commit fa5e1faa10e2cff02f79c6d137409b0305e54cd9
parent 38732fe79da42e605dcc3294b63d6ef6e57178f9
Author: falkTX <falktx@gmail.com>
Date: Mon, 27 Apr 2015 23:05:23 +0200
Cleanup
Diffstat:
8 files changed, 0 insertions(+), 13463 deletions(-)
diff --git a/dgl/src/nanovg2/LICENSE.txt b/dgl/src/nanovg2/LICENSE.txt
@@ -1,18 +0,0 @@
-Copyright (c) 2013 Mikko Mononen memon@inside.org
-
-This software is provided 'as-is', without any express or implied
-warranty. In no event will the authors be held liable for any damages
-arising from the use of this software.
-
-Permission is granted to anyone to use this software for any purpose,
-including commercial applications, and to alter it and redistribute it
-freely, subject to the following restrictions:
-
-1. The origin of this software must not be misrepresented; you must not
-claim that you wrote the original software. If you use this software
-in a product, an acknowledgment in the product documentation would be
-appreciated but is not required.
-2. Altered source versions must be plainly marked as such, and must not be
-misrepresented as being the original software.
-3. This notice may not be removed or altered from any source distribution.
-
diff --git a/dgl/src/nanovg2/fontstash.h b/dgl/src/nanovg2/fontstash.h
@@ -1,1688 +0,0 @@
-//
-// Copyright (c) 2009-2013 Mikko Mononen memon@inside.org
-//
-// This software is provided 'as-is', without any express or implied
-// warranty. In no event will the authors be held liable for any damages
-// arising from the use of this software.
-// Permission is granted to anyone to use this software for any purpose,
-// including commercial applications, and to alter it and redistribute it
-// freely, subject to the following restrictions:
-// 1. The origin of this software must not be misrepresented; you must not
-// claim that you wrote the original software. If you use this software
-// in a product, an acknowledgment in the product documentation would be
-// appreciated but is not required.
-// 2. Altered source versions must be plainly marked as such, and must not be
-// misrepresented as being the original software.
-// 3. This notice may not be removed or altered from any source distribution.
-//
-
-#ifndef FONS_H
-#define FONS_H
-
-#define FONS_INVALID -1
-
-enum FONSflags {
- FONS_ZERO_TOPLEFT = 1,
- FONS_ZERO_BOTTOMLEFT = 2,
-};
-
-enum FONSalign {
- // Horizontal align
- FONS_ALIGN_LEFT = 1<<0, // Default
- FONS_ALIGN_CENTER = 1<<1,
- FONS_ALIGN_RIGHT = 1<<2,
- // Vertical align
- FONS_ALIGN_TOP = 1<<3,
- FONS_ALIGN_MIDDLE = 1<<4,
- FONS_ALIGN_BOTTOM = 1<<5,
- FONS_ALIGN_BASELINE = 1<<6, // Default
-};
-
-enum FONSerrorCode {
- // Font atlas is full.
- FONS_ATLAS_FULL = 1,
- // Scratch memory used to render glyphs is full, requested size reported in 'val', you may need to bump up FONS_SCRATCH_BUF_SIZE.
- FONS_SCRATCH_FULL = 2,
- // Calls to fonsPushState has created too large stack, if you need deep state stack bump up FONS_MAX_STATES.
- FONS_STATES_OVERFLOW = 3,
- // Trying to pop too many states fonsPopState().
- FONS_STATES_UNDERFLOW = 4,
-};
-
-struct FONSparams {
- int width, height;
- unsigned char flags;
- void* userPtr;
- int (*renderCreate)(void* uptr, int width, int height);
- int (*renderResize)(void* uptr, int width, int height);
- void (*renderUpdate)(void* uptr, int* rect, const unsigned char* data);
- void (*renderDraw)(void* uptr, const float* verts, const float* tcoords, const unsigned int* colors, int nverts);
- void (*renderDelete)(void* uptr);
-};
-typedef struct FONSparams FONSparams;
-
-struct FONSquad
-{
- float x0,y0,s0,t0;
- float x1,y1,s1,t1;
-};
-typedef struct FONSquad FONSquad;
-
-struct FONStextIter {
- float x, y, nextx, nexty, scale, spacing;
- unsigned int codepoint;
- short isize, iblur;
- struct FONSfont* font;
- int prevGlyphIndex;
- const char* str;
- const char* next;
- const char* end;
- unsigned int utf8state;
-};
-typedef struct FONStextIter FONStextIter;
-
-typedef struct FONScontext FONScontext;
-
-// Constructor and destructor.
-FONScontext* fonsCreateInternal(FONSparams* params);
-void fonsDeleteInternal(FONScontext* s);
-
-void fonsSetErrorCallback(FONScontext* s, void (*callback)(void* uptr, int error, int val), void* uptr);
-// Returns current atlas size.
-void fonsGetAtlasSize(FONScontext* s, int* width, int* height);
-// Expands the atlas size.
-int fonsExpandAtlas(FONScontext* s, int width, int height);
-// Resets the whole stash.
-int fonsResetAtlas(FONScontext* stash, int width, int height);
-
-// Add fonts
-int fonsAddFont(FONScontext* s, const char* name, const char* path);
-int fonsAddFontMem(FONScontext* s, const char* name, unsigned char* data, int ndata, int freeData);
-int fonsGetFontByName(FONScontext* s, const char* name);
-
-// State handling
-void fonsPushState(FONScontext* s);
-void fonsPopState(FONScontext* s);
-void fonsClearState(FONScontext* s);
-
-// State setting
-void fonsSetSize(FONScontext* s, float size);
-void fonsSetColor(FONScontext* s, unsigned int color);
-void fonsSetSpacing(FONScontext* s, float spacing);
-void fonsSetBlur(FONScontext* s, float blur);
-void fonsSetAlign(FONScontext* s, int align);
-void fonsSetFont(FONScontext* s, int font);
-
-// Draw text
-float fonsDrawText(FONScontext* s, float x, float y, const char* string, const char* end);
-
-// Measure text
-float fonsTextBounds(FONScontext* s, float x, float y, const char* string, const char* end, float* bounds);
-void fonsLineBounds(FONScontext* s, float y, float* miny, float* maxy);
-void fonsVertMetrics(FONScontext* s, float* ascender, float* descender, float* lineh);
-
-// Text iterator
-int fonsTextIterInit(FONScontext* stash, FONStextIter* iter, float x, float y, const char* str, const char* end);
-int fonsTextIterNext(FONScontext* stash, FONStextIter* iter, struct FONSquad* quad);
-
-// Pull texture changes
-const unsigned char* fonsGetTextureData(FONScontext* stash, int* width, int* height);
-int fonsValidateTexture(FONScontext* s, int* dirty);
-
-// Draws the stash texture for debugging
-void fonsDrawDebug(FONScontext* s, float x, float y);
-
-#endif // FONTSTASH_H
-
-
-#ifdef FONTSTASH_IMPLEMENTATION
-
-#define FONS_NOTUSED(v) (void)sizeof(v)
-
-#ifdef FONS_USE_FREETYPE
-
-#include <ft2build.h>
-#include FT_FREETYPE_H
-#include FT_ADVANCES_H
-#include <math.h>
-
-struct FONSttFontImpl {
- FT_Face font;
-};
-typedef struct FONSttFontImpl FONSttFontImpl;
-
-static FT_Library ftLibrary;
-
-int fons__tt_init(FONScontext *context)
-{
- FT_Error ftError;
- FONS_NOTUSED(context);
- ftError = FT_Init_FreeType(&ftLibrary);
- return ftError == 0;
-}
-
-int fons__tt_loadFont(FONScontext *context, FONSttFontImpl *font, unsigned char *data, int dataSize)
-{
- FT_Error ftError;
- FONS_NOTUSED(context);
-
- //font->font.userdata = stash;
- ftError = FT_New_Memory_Face(ftLibrary, (const FT_Byte*)data, dataSize, 0, &font->font);
- return ftError == 0;
-}
-
-void fons__tt_getFontVMetrics(FONSttFontImpl *font, int *ascent, int *descent, int *lineGap)
-{
- *ascent = font->font->ascender;
- *descent = font->font->descender;
- *lineGap = font->font->height - (*ascent - *descent);
-}
-
-float fons__tt_getPixelHeightScale(FONSttFontImpl *font, float size)
-{
- return size / (font->font->ascender - font->font->descender);
-}
-
-int fons__tt_getGlyphIndex(FONSttFontImpl *font, int codepoint)
-{
- return FT_Get_Char_Index(font->font, codepoint);
-}
-
-int fons__tt_buildGlyphBitmap(FONSttFontImpl *font, int glyph, float size, float scale,
- int *advance, int *lsb, int *x0, int *y0, int *x1, int *y1)
-{
- FT_Error ftError;
- FT_GlyphSlot ftGlyph;
- FONS_NOTUSED(scale);
-
- ftError = FT_Set_Pixel_Sizes(font->font, 0, (FT_UInt)(size * (float)font->font->units_per_EM / (float)(font->font->ascender - font->font->descender)));
- if (ftError) return 0;
- ftError = FT_Load_Glyph(font->font, glyph, FT_LOAD_RENDER);
- if (ftError) return 0;
- ftError = FT_Get_Advance(font->font, glyph, FT_LOAD_NO_SCALE, (FT_Fixed*)advance);
- if (ftError) return 0;
- ftGlyph = font->font->glyph;
- *lsb = ftGlyph->metrics.horiBearingX;
- *x0 = ftGlyph->bitmap_left;
- *x1 = *x0 + ftGlyph->bitmap.width;
- *y0 = -ftGlyph->bitmap_top;
- *y1 = *y0 + ftGlyph->bitmap.rows;
- return 1;
-}
-
-void fons__tt_renderGlyphBitmap(FONSttFontImpl *font, unsigned char *output, int outWidth, int outHeight, int outStride,
- float scaleX, float scaleY, int glyph)
-{
- FT_GlyphSlot ftGlyph = font->font->glyph;
- int ftGlyphOffset = 0;
- int x, y;
- FONS_NOTUSED(outWidth);
- FONS_NOTUSED(outHeight);
- FONS_NOTUSED(scaleX);
- FONS_NOTUSED(scaleY);
- FONS_NOTUSED(glyph); // glyph has already been loaded by fons__tt_buildGlyphBitmap
-
- for ( y = 0; y < ftGlyph->bitmap.rows; y++ ) {
- for ( x = 0; x < ftGlyph->bitmap.width; x++ ) {
- output[(y * outStride) + x] = ftGlyph->bitmap.buffer[ftGlyphOffset++];
- }
- }
-}
-
-int fons__tt_getGlyphKernAdvance(FONSttFontImpl *font, int glyph1, int glyph2)
-{
- FT_Vector ftKerning;
- FT_Get_Kerning(font->font, glyph1, glyph2, FT_KERNING_DEFAULT, &ftKerning);
- return ftKerning.x;
-}
-
-#else
-
-#define STB_TRUETYPE_IMPLEMENTATION
-static void* fons__tmpalloc(size_t size, void* up);
-static void fons__tmpfree(void* ptr, void* up);
-#define STBTT_malloc(x,u) fons__tmpalloc(x,u)
-#define STBTT_free(x,u) fons__tmpfree(x,u)
-#include "stb_truetype.h"
-
-struct FONSttFontImpl {
- stbtt_fontinfo font;
-};
-typedef struct FONSttFontImpl FONSttFontImpl;
-
-int fons__tt_init(FONScontext *context)
-{
- FONS_NOTUSED(context);
- return 1;
-}
-
-int fons__tt_loadFont(FONScontext *context, FONSttFontImpl *font, unsigned char *data, int dataSize)
-{
- int stbError;
- FONS_NOTUSED(dataSize);
-
- font->font.userdata = context;
- stbError = stbtt_InitFont(&font->font, data, 0);
- return stbError;
-}
-
-void fons__tt_getFontVMetrics(FONSttFontImpl *font, int *ascent, int *descent, int *lineGap)
-{
- stbtt_GetFontVMetrics(&font->font, ascent, descent, lineGap);
-}
-
-float fons__tt_getPixelHeightScale(FONSttFontImpl *font, float size)
-{
- return stbtt_ScaleForPixelHeight(&font->font, size);
-}
-
-int fons__tt_getGlyphIndex(FONSttFontImpl *font, int codepoint)
-{
- return stbtt_FindGlyphIndex(&font->font, codepoint);
-}
-
-int fons__tt_buildGlyphBitmap(FONSttFontImpl *font, int glyph, float size, float scale,
- int *advance, int *lsb, int *x0, int *y0, int *x1, int *y1)
-{
- FONS_NOTUSED(size);
- stbtt_GetGlyphHMetrics(&font->font, glyph, advance, lsb);
- stbtt_GetGlyphBitmapBox(&font->font, glyph, scale, scale, x0, y0, x1, y1);
- return 1;
-}
-
-void fons__tt_renderGlyphBitmap(FONSttFontImpl *font, unsigned char *output, int outWidth, int outHeight, int outStride,
- float scaleX, float scaleY, int glyph)
-{
- stbtt_MakeGlyphBitmap(&font->font, output, outWidth, outHeight, outStride, scaleX, scaleY, glyph);
-}
-
-int fons__tt_getGlyphKernAdvance(FONSttFontImpl *font, int glyph1, int glyph2)
-{
- return stbtt_GetGlyphKernAdvance(&font->font, glyph1, glyph2);
-}
-
-#endif
-
-#ifndef FONS_SCRATCH_BUF_SIZE
-# define FONS_SCRATCH_BUF_SIZE 16000
-#endif
-#ifndef FONS_HASH_LUT_SIZE
-# define FONS_HASH_LUT_SIZE 256
-#endif
-#ifndef FONS_INIT_FONTS
-# define FONS_INIT_FONTS 4
-#endif
-#ifndef FONS_INIT_GLYPHS
-# define FONS_INIT_GLYPHS 256
-#endif
-#ifndef FONS_INIT_ATLAS_NODES
-# define FONS_INIT_ATLAS_NODES 256
-#endif
-#ifndef FONS_VERTEX_COUNT
-# define FONS_VERTEX_COUNT 1024
-#endif
-#ifndef FONS_MAX_STATES
-# define FONS_MAX_STATES 20
-#endif
-
-static unsigned int fons__hashint(unsigned int a)
-{
- a += ~(a<<15);
- a ^= (a>>10);
- a += (a<<3);
- a ^= (a>>6);
- a += ~(a<<11);
- a ^= (a>>16);
- return a;
-}
-
-static int fons__mini(int a, int b)
-{
- return a < b ? a : b;
-}
-
-static int fons__maxi(int a, int b)
-{
- return a > b ? a : b;
-}
-
-struct FONSglyph
-{
- unsigned int codepoint;
- int index;
- int next;
- short size, blur;
- short x0,y0,x1,y1;
- short xadv,xoff,yoff;
-};
-typedef struct FONSglyph FONSglyph;
-
-struct FONSfont
-{
- FONSttFontImpl font;
- char name[64];
- unsigned char* data;
- int dataSize;
- unsigned char freeData;
- float ascender;
- float descender;
- float lineh;
- FONSglyph* glyphs;
- int cglyphs;
- int nglyphs;
- int lut[FONS_HASH_LUT_SIZE];
-};
-typedef struct FONSfont FONSfont;
-
-struct FONSstate
-{
- int font;
- int align;
- float size;
- unsigned int color;
- float blur;
- float spacing;
-};
-typedef struct FONSstate FONSstate;
-
-struct FONSatlasNode {
- short x, y, width;
-};
-typedef struct FONSatlasNode FONSatlasNode;
-
-struct FONSatlas
-{
- int width, height;
- FONSatlasNode* nodes;
- int nnodes;
- int cnodes;
-};
-typedef struct FONSatlas FONSatlas;
-
-struct FONScontext
-{
- FONSparams params;
- float itw,ith;
- unsigned char* texData;
- int dirtyRect[4];
- FONSfont** fonts;
- FONSatlas* atlas;
- int cfonts;
- int nfonts;
- float verts[FONS_VERTEX_COUNT*2];
- float tcoords[FONS_VERTEX_COUNT*2];
- unsigned int colors[FONS_VERTEX_COUNT];
- int nverts;
- unsigned char* scratch;
- int nscratch;
- FONSstate states[FONS_MAX_STATES];
- int nstates;
- void (*handleError)(void* uptr, int error, int val);
- void* errorUptr;
-};
-
-static void* fons__tmpalloc(size_t size, void* up)
-{
- unsigned char* ptr;
- FONScontext* stash = (FONScontext*)up;
-
- // 16-byte align the returned pointer
- size = (size + 0xf) & ~0xf;
-
- if (stash->nscratch+(int)size > FONS_SCRATCH_BUF_SIZE) {
- if (stash->handleError)
- stash->handleError(stash->errorUptr, FONS_SCRATCH_FULL, stash->nscratch+(int)size);
- return NULL;
- }
- ptr = stash->scratch + stash->nscratch;
- stash->nscratch += (int)size;
- return ptr;
-}
-
-static void fons__tmpfree(void* ptr, void* up)
-{
- (void)ptr;
- (void)up;
- // empty
-}
-
-// Copyright (c) 2008-2010 Bjoern Hoehrmann <bjoern@hoehrmann.de>
-// See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
-
-#define FONS_UTF8_ACCEPT 0
-#define FONS_UTF8_REJECT 12
-
-static unsigned int fons__decutf8(unsigned int* state, unsigned int* codep, unsigned int byte)
-{
- static const unsigned char utf8d[] = {
- // The first part of the table maps bytes to character classes that
- // to reduce the size of the transition table and create bitmasks.
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
- 10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8,
-
- // The second part is a transition table that maps a combination
- // of a state of the automaton and a character class to a state.
- 0,12,24,36,60,96,84,12,12,12,48,72, 12,12,12,12,12,12,12,12,12,12,12,12,
- 12, 0,12,12,12,12,12, 0,12, 0,12,12, 12,24,12,12,12,12,12,24,12,24,12,12,
- 12,12,12,12,12,12,12,24,12,12,12,12, 12,24,12,12,12,12,12,12,12,24,12,12,
- 12,12,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,36,12,36,12,12,
- 12,36,12,12,12,12,12,12,12,12,12,12,
- };
-
- unsigned int type = utf8d[byte];
-
- *codep = (*state != FONS_UTF8_ACCEPT) ?
- (byte & 0x3fu) | (*codep << 6) :
- (0xff >> type) & (byte);
-
- *state = utf8d[256 + *state + type];
- return *state;
-}
-
-// Atlas based on Skyline Bin Packer by Jukka Jylänki
-
-static void fons__deleteAtlas(FONSatlas* atlas)
-{
- if (atlas == NULL) return;
- if (atlas->nodes != NULL) free(atlas->nodes);
- free(atlas);
-}
-
-static FONSatlas* fons__allocAtlas(int w, int h, int nnodes)
-{
- FONSatlas* atlas = NULL;
-
- // Allocate memory for the font stash.
- atlas = (FONSatlas*)malloc(sizeof(FONSatlas));
- if (atlas == NULL) goto error;
- memset(atlas, 0, sizeof(FONSatlas));
-
- atlas->width = w;
- atlas->height = h;
-
- // Allocate space for skyline nodes
- atlas->nodes = (FONSatlasNode*)malloc(sizeof(FONSatlasNode) * nnodes);
- if (atlas->nodes == NULL) goto error;
- memset(atlas->nodes, 0, sizeof(FONSatlasNode) * nnodes);
- atlas->nnodes = 0;
- atlas->cnodes = nnodes;
-
- // Init root node.
- atlas->nodes[0].x = 0;
- atlas->nodes[0].y = 0;
- atlas->nodes[0].width = (short)w;
- atlas->nnodes++;
-
- return atlas;
-
-error:
- if (atlas) fons__deleteAtlas(atlas);
- return NULL;
-}
-
-static int fons__atlasInsertNode(FONSatlas* atlas, int idx, int x, int y, int w)
-{
- int i;
- // Insert node
- if (atlas->nnodes+1 > atlas->cnodes) {
- atlas->cnodes = atlas->cnodes == 0 ? 8 : atlas->cnodes * 2;
- atlas->nodes = (FONSatlasNode*)realloc(atlas->nodes, sizeof(FONSatlasNode) * atlas->cnodes);
- if (atlas->nodes == NULL)
- return 0;
- }
- for (i = atlas->nnodes; i > idx; i--)
- atlas->nodes[i] = atlas->nodes[i-1];
- atlas->nodes[idx].x = (short)x;
- atlas->nodes[idx].y = (short)y;
- atlas->nodes[idx].width = (short)w;
- atlas->nnodes++;
-
- return 1;
-}
-
-static void fons__atlasRemoveNode(FONSatlas* atlas, int idx)
-{
- int i;
- if (atlas->nnodes == 0) return;
- for (i = idx; i < atlas->nnodes-1; i++)
- atlas->nodes[i] = atlas->nodes[i+1];
- atlas->nnodes--;
-}
-
-static void fons__atlasExpand(FONSatlas* atlas, int w, int h)
-{
- // Insert node for empty space
- if (w > atlas->width)
- fons__atlasInsertNode(atlas, atlas->nnodes, atlas->width, 0, w - atlas->width);
- atlas->width = w;
- atlas->height = h;
-}
-
-static void fons__atlasReset(FONSatlas* atlas, int w, int h)
-{
- atlas->width = w;
- atlas->height = h;
- atlas->nnodes = 0;
-
- // Init root node.
- atlas->nodes[0].x = 0;
- atlas->nodes[0].y = 0;
- atlas->nodes[0].width = (short)w;
- atlas->nnodes++;
-}
-
-static int fons__atlasAddSkylineLevel(FONSatlas* atlas, int idx, int x, int y, int w, int h)
-{
- int i;
-
- // Insert new node
- if (fons__atlasInsertNode(atlas, idx, x, y+h, w) == 0)
- return 0;
-
- // Delete skyline segments that fall under the shadow of the new segment.
- for (i = idx+1; i < atlas->nnodes; i++) {
- if (atlas->nodes[i].x < atlas->nodes[i-1].x + atlas->nodes[i-1].width) {
- int shrink = atlas->nodes[i-1].x + atlas->nodes[i-1].width - atlas->nodes[i].x;
- atlas->nodes[i].x += (short)shrink;
- atlas->nodes[i].width -= (short)shrink;
- if (atlas->nodes[i].width <= 0) {
- fons__atlasRemoveNode(atlas, i);
- i--;
- } else {
- break;
- }
- } else {
- break;
- }
- }
-
- // Merge same height skyline segments that are next to each other.
- for (i = 0; i < atlas->nnodes-1; i++) {
- if (atlas->nodes[i].y == atlas->nodes[i+1].y) {
- atlas->nodes[i].width += atlas->nodes[i+1].width;
- fons__atlasRemoveNode(atlas, i+1);
- i--;
- }
- }
-
- return 1;
-}
-
-static int fons__atlasRectFits(FONSatlas* atlas, int i, int w, int h)
-{
- // Checks if there is enough space at the location of skyline span 'i',
- // and return the max height of all skyline spans under that at that location,
- // (think tetris block being dropped at that position). Or -1 if no space found.
- int x = atlas->nodes[i].x;
- int y = atlas->nodes[i].y;
- int spaceLeft;
- if (x + w > atlas->width)
- return -1;
- spaceLeft = w;
- while (spaceLeft > 0) {
- if (i == atlas->nnodes) return -1;
- y = fons__maxi(y, atlas->nodes[i].y);
- if (y + h > atlas->height) return -1;
- spaceLeft -= atlas->nodes[i].width;
- ++i;
- }
- return y;
-}
-
-static int fons__atlasAddRect(FONSatlas* atlas, int rw, int rh, int* rx, int* ry)
-{
- int besth = atlas->height, bestw = atlas->width, besti = -1;
- int bestx = -1, besty = -1, i;
-
- // Bottom left fit heuristic.
- for (i = 0; i < atlas->nnodes; i++) {
- int y = fons__atlasRectFits(atlas, i, rw, rh);
- if (y != -1) {
- if (y + rh < besth || (y + rh == besth && atlas->nodes[i].width < bestw)) {
- besti = i;
- bestw = atlas->nodes[i].width;
- besth = y + rh;
- bestx = atlas->nodes[i].x;
- besty = y;
- }
- }
- }
-
- if (besti == -1)
- return 0;
-
- // Perform the actual packing.
- if (fons__atlasAddSkylineLevel(atlas, besti, bestx, besty, rw, rh) == 0)
- return 0;
-
- *rx = bestx;
- *ry = besty;
-
- return 1;
-}
-
-static void fons__addWhiteRect(FONScontext* stash, int w, int h)
-{
- int x, y, gx, gy;
- unsigned char* dst;
- if (fons__atlasAddRect(stash->atlas, w, h, &gx, &gy) == 0)
- return;
-
- // Rasterize
- dst = &stash->texData[gx + gy * stash->params.width];
- for (y = 0; y < h; y++) {
- for (x = 0; x < w; x++)
- dst[x] = 0xff;
- dst += stash->params.width;
- }
-
- stash->dirtyRect[0] = fons__mini(stash->dirtyRect[0], gx);
- stash->dirtyRect[1] = fons__mini(stash->dirtyRect[1], gy);
- stash->dirtyRect[2] = fons__maxi(stash->dirtyRect[2], gx+w);
- stash->dirtyRect[3] = fons__maxi(stash->dirtyRect[3], gy+h);
-}
-
-FONScontext* fonsCreateInternal(FONSparams* params)
-{
- FONScontext* stash = NULL;
-
- // Allocate memory for the font stash.
- stash = (FONScontext*)malloc(sizeof(FONScontext));
- if (stash == NULL) goto error;
- memset(stash, 0, sizeof(FONScontext));
-
- stash->params = *params;
-
- // Allocate scratch buffer.
- stash->scratch = (unsigned char*)malloc(FONS_SCRATCH_BUF_SIZE);
- if (stash->scratch == NULL) goto error;
-
- // Initialize implementation library
- if (!fons__tt_init(stash)) goto error;
-
- if (stash->params.renderCreate != NULL) {
- if (stash->params.renderCreate(stash->params.userPtr, stash->params.width, stash->params.height) == 0)
- goto error;
- }
-
- stash->atlas = fons__allocAtlas(stash->params.width, stash->params.height, FONS_INIT_ATLAS_NODES);
- if (stash->atlas == NULL) goto error;
-
- // Allocate space for fonts.
- stash->fonts = (FONSfont**)malloc(sizeof(FONSfont*) * FONS_INIT_FONTS);
- if (stash->fonts == NULL) goto error;
- memset(stash->fonts, 0, sizeof(FONSfont*) * FONS_INIT_FONTS);
- stash->cfonts = FONS_INIT_FONTS;
- stash->nfonts = 0;
-
- // Create texture for the cache.
- stash->itw = 1.0f/stash->params.width;
- stash->ith = 1.0f/stash->params.height;
- stash->texData = (unsigned char*)malloc(stash->params.width * stash->params.height);
- if (stash->texData == NULL) goto error;
- memset(stash->texData, 0, stash->params.width * stash->params.height);
-
- stash->dirtyRect[0] = stash->params.width;
- stash->dirtyRect[1] = stash->params.height;
- stash->dirtyRect[2] = 0;
- stash->dirtyRect[3] = 0;
-
- // Add white rect at 0,0 for debug drawing.
- fons__addWhiteRect(stash, 2,2);
-
- fonsPushState(stash);
- fonsClearState(stash);
-
- return stash;
-
-error:
- fonsDeleteInternal(stash);
- return NULL;
-}
-
-static FONSstate* fons__getState(FONScontext* stash)
-{
- return &stash->states[stash->nstates-1];
-}
-
-void fonsSetSize(FONScontext* stash, float size)
-{
- fons__getState(stash)->size = size;
-}
-
-void fonsSetColor(FONScontext* stash, unsigned int color)
-{
- fons__getState(stash)->color = color;
-}
-
-void fonsSetSpacing(FONScontext* stash, float spacing)
-{
- fons__getState(stash)->spacing = spacing;
-}
-
-void fonsSetBlur(FONScontext* stash, float blur)
-{
- fons__getState(stash)->blur = blur;
-}
-
-void fonsSetAlign(FONScontext* stash, int align)
-{
- fons__getState(stash)->align = align;
-}
-
-void fonsSetFont(FONScontext* stash, int font)
-{
- fons__getState(stash)->font = font;
-}
-
-void fonsPushState(FONScontext* stash)
-{
- if (stash->nstates >= FONS_MAX_STATES) {
- if (stash->handleError)
- stash->handleError(stash->errorUptr, FONS_STATES_OVERFLOW, 0);
- return;
- }
- if (stash->nstates > 0)
- memcpy(&stash->states[stash->nstates], &stash->states[stash->nstates-1], sizeof(FONSstate));
- stash->nstates++;
-}
-
-void fonsPopState(FONScontext* stash)
-{
- if (stash->nstates <= 1) {
- if (stash->handleError)
- stash->handleError(stash->errorUptr, FONS_STATES_UNDERFLOW, 0);
- return;
- }
- stash->nstates--;
-}
-
-void fonsClearState(FONScontext* stash)
-{
- FONSstate* state = fons__getState(stash);
- state->size = 12.0f;
- state->color = 0xffffffff;
- state->font = 0;
- state->blur = 0;
- state->spacing = 0;
- state->align = FONS_ALIGN_LEFT | FONS_ALIGN_BASELINE;
-}
-
-static void fons__freeFont(FONSfont* font)
-{
- if (font == NULL) return;
- if (font->glyphs) free(font->glyphs);
- if (font->freeData && font->data) free(font->data);
- free(font);
-}
-
-static int fons__allocFont(FONScontext* stash)
-{
- FONSfont* font = NULL;
- if (stash->nfonts+1 > stash->cfonts) {
- stash->cfonts = stash->cfonts == 0 ? 8 : stash->cfonts * 2;
- stash->fonts = (FONSfont**)realloc(stash->fonts, sizeof(FONSfont*) * stash->cfonts);
- if (stash->fonts == NULL)
- return -1;
- }
- font = (FONSfont*)malloc(sizeof(FONSfont));
- if (font == NULL) goto error;
- memset(font, 0, sizeof(FONSfont));
-
- font->glyphs = (FONSglyph*)malloc(sizeof(FONSglyph) * FONS_INIT_GLYPHS);
- if (font->glyphs == NULL) goto error;
- font->cglyphs = FONS_INIT_GLYPHS;
- font->nglyphs = 0;
-
- stash->fonts[stash->nfonts++] = font;
- return stash->nfonts-1;
-
-error:
- fons__freeFont(font);
-
- return FONS_INVALID;
-}
-
-int fonsAddFont(FONScontext* stash, const char* name, const char* path)
-{
- FILE* fp = 0;
- int dataSize = 0;
- unsigned char* data = NULL;
-
- // Read in the font data.
- fp = fopen(path, "rb");
- if (fp == NULL) goto error;
- fseek(fp,0,SEEK_END);
- dataSize = (int)ftell(fp);
- fseek(fp,0,SEEK_SET);
- data = (unsigned char*)malloc(dataSize);
- if (data == NULL) goto error;
- fread(data, 1, dataSize, fp);
- fclose(fp);
- fp = 0;
-
- return fonsAddFontMem(stash, name, data, dataSize, 1);
-
-error:
- if (data) free(data);
- if (fp) fclose(fp);
- return FONS_INVALID;
-}
-
-int fonsAddFontMem(FONScontext* stash, const char* name, unsigned char* data, int dataSize, int freeData)
-{
- int i, ascent, descent, fh, lineGap;
- FONSfont* font;
-
- int idx = fons__allocFont(stash);
- if (idx == FONS_INVALID)
- return FONS_INVALID;
-
- font = stash->fonts[idx];
-
- strncpy(font->name, name, sizeof(font->name));
- font->name[sizeof(font->name)-1] = '\0';
-
- // Init hash lookup.
- for (i = 0; i < FONS_HASH_LUT_SIZE; ++i)
- font->lut[i] = -1;
-
- // Read in the font data.
- font->dataSize = dataSize;
- font->data = data;
- font->freeData = (unsigned char)freeData;
-
- // Init font
- stash->nscratch = 0;
- if (!fons__tt_loadFont(stash, &font->font, data, dataSize)) goto error;
-
- // Store normalized line height. The real line height is got
- // by multiplying the lineh by font size.
- fons__tt_getFontVMetrics( &font->font, &ascent, &descent, &lineGap);
- fh = ascent - descent;
- font->ascender = (float)ascent / (float)fh;
- font->descender = (float)descent / (float)fh;
- font->lineh = (float)(fh + lineGap) / (float)fh;
-
- return idx;
-
-error:
- fons__freeFont(font);
- stash->nfonts--;
- return FONS_INVALID;
-}
-
-int fonsGetFontByName(FONScontext* s, const char* name)
-{
- int i;
- for (i = 0; i < s->nfonts; i++) {
- if (strcmp(s->fonts[i]->name, name) == 0)
- return i;
- }
- return FONS_INVALID;
-}
-
-
-static FONSglyph* fons__allocGlyph(FONSfont* font)
-{
- if (font->nglyphs+1 > font->cglyphs) {
- font->cglyphs = font->cglyphs == 0 ? 8 : font->cglyphs * 2;
- font->glyphs = (FONSglyph*)realloc(font->glyphs, sizeof(FONSglyph) * font->cglyphs);
- if (font->glyphs == NULL) return NULL;
- }
- font->nglyphs++;
- return &font->glyphs[font->nglyphs-1];
-}
-
-
-// Based on Exponential blur, Jani Huhtanen, 2006
-
-#define APREC 16
-#define ZPREC 7
-
-static void fons__blurCols(unsigned char* dst, int w, int h, int dstStride, int alpha)
-{
- int x, y;
- for (y = 0; y < h; y++) {
- int z = 0; // force zero border
- for (x = 1; x < w; x++) {
- z += (alpha * (((int)(dst[x]) << ZPREC) - z)) >> APREC;
- dst[x] = (unsigned char)(z >> ZPREC);
- }
- dst[w-1] = 0; // force zero border
- z = 0;
- for (x = w-2; x >= 0; x--) {
- z += (alpha * (((int)(dst[x]) << ZPREC) - z)) >> APREC;
- dst[x] = (unsigned char)(z >> ZPREC);
- }
- dst[0] = 0; // force zero border
- dst += dstStride;
- }
-}
-
-static void fons__blurRows(unsigned char* dst, int w, int h, int dstStride, int alpha)
-{
- int x, y;
- for (x = 0; x < w; x++) {
- int z = 0; // force zero border
- for (y = dstStride; y < h*dstStride; y += dstStride) {
- z += (alpha * (((int)(dst[y]) << ZPREC) - z)) >> APREC;
- dst[y] = (unsigned char)(z >> ZPREC);
- }
- dst[(h-1)*dstStride] = 0; // force zero border
- z = 0;
- for (y = (h-2)*dstStride; y >= 0; y -= dstStride) {
- z += (alpha * (((int)(dst[y]) << ZPREC) - z)) >> APREC;
- dst[y] = (unsigned char)(z >> ZPREC);
- }
- dst[0] = 0; // force zero border
- dst++;
- }
-}
-
-
-static void fons__blur(FONScontext* stash, unsigned char* dst, int w, int h, int dstStride, int blur)
-{
- int alpha;
- float sigma;
- (void)stash;
-
- if (blur < 1)
- return;
- // Calculate the alpha such that 90% of the kernel is within the radius. (Kernel extends to infinity)
- sigma = (float)blur * 0.57735f; // 1 / sqrt(3)
- alpha = (int)((1<<APREC) * (1.0f - expf(-2.3f / (sigma+1.0f))));
- fons__blurRows(dst, w, h, dstStride, alpha);
- fons__blurCols(dst, w, h, dstStride, alpha);
- fons__blurRows(dst, w, h, dstStride, alpha);
- fons__blurCols(dst, w, h, dstStride, alpha);
-// fons__blurrows(dst, w, h, dstStride, alpha);
-// fons__blurcols(dst, w, h, dstStride, alpha);
-}
-
-static FONSglyph* fons__getGlyph(FONScontext* stash, FONSfont* font, unsigned int codepoint,
- short isize, short iblur)
-{
- int i, g, advance, lsb, x0, y0, x1, y1, gw, gh, gx, gy, x, y;
- float scale;
- FONSglyph* glyph = NULL;
- unsigned int h;
- float size = isize/10.0f;
- int pad, added;
- unsigned char* bdst;
- unsigned char* dst;
-
- if (isize < 2) return NULL;
- if (iblur > 20) iblur = 20;
- pad = iblur+2;
-
- // Reset allocator.
- stash->nscratch = 0;
-
- // Find code point and size.
- h = fons__hashint(codepoint) & (FONS_HASH_LUT_SIZE-1);
- i = font->lut[h];
- while (i != -1) {
- if (font->glyphs[i].codepoint == codepoint && font->glyphs[i].size == isize && font->glyphs[i].blur == iblur)
- return &font->glyphs[i];
- i = font->glyphs[i].next;
- }
-
- // Could not find glyph, create it.
- scale = fons__tt_getPixelHeightScale(&font->font, size);
- g = fons__tt_getGlyphIndex(&font->font, codepoint);
- fons__tt_buildGlyphBitmap(&font->font, g, size, scale, &advance, &lsb, &x0, &y0, &x1, &y1);
- gw = x1-x0 + pad*2;
- gh = y1-y0 + pad*2;
-
- // Find free spot for the rect in the atlas
- added = fons__atlasAddRect(stash->atlas, gw, gh, &gx, &gy);
- if (added == 0 && stash->handleError != NULL) {
- // Atlas is full, let the user to resize the atlas (or not), and try again.
- stash->handleError(stash->errorUptr, FONS_ATLAS_FULL, 0);
- added = fons__atlasAddRect(stash->atlas, gw, gh, &gx, &gy);
- }
- if (added == 0) return NULL;
-
- // Init glyph.
- glyph = fons__allocGlyph(font);
- glyph->codepoint = codepoint;
- glyph->size = isize;
- glyph->blur = iblur;
- glyph->index = g;
- glyph->x0 = (short)gx;
- glyph->y0 = (short)gy;
- glyph->x1 = (short)(glyph->x0+gw);
- glyph->y1 = (short)(glyph->y0+gh);
- glyph->xadv = (short)(scale * advance * 10.0f);
- glyph->xoff = (short)(x0 - pad);
- glyph->yoff = (short)(y0 - pad);
- glyph->next = 0;
-
- // Insert char to hash lookup.
- glyph->next = font->lut[h];
- font->lut[h] = font->nglyphs-1;
-
- // Rasterize
- dst = &stash->texData[(glyph->x0+pad) + (glyph->y0+pad) * stash->params.width];
- fons__tt_renderGlyphBitmap(&font->font, dst, gw-pad*2,gh-pad*2, stash->params.width, scale,scale, g);
-
- // Make sure there is one pixel empty border.
- dst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width];
- for (y = 0; y < gh; y++) {
- dst[y*stash->params.width] = 0;
- dst[gw-1 + y*stash->params.width] = 0;
- }
- for (x = 0; x < gw; x++) {
- dst[x] = 0;
- dst[x + (gh-1)*stash->params.width] = 0;
- }
-
- // Debug code to color the glyph background
-/* unsigned char* fdst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width];
- for (y = 0; y < gh; y++) {
- for (x = 0; x < gw; x++) {
- int a = (int)fdst[x+y*stash->params.width] + 20;
- if (a > 255) a = 255;
- fdst[x+y*stash->params.width] = a;
- }
- }*/
-
- // Blur
- if (iblur > 0) {
- stash->nscratch = 0;
- bdst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width];
- fons__blur(stash, bdst, gw,gh, stash->params.width, iblur);
- }
-
- stash->dirtyRect[0] = fons__mini(stash->dirtyRect[0], glyph->x0);
- stash->dirtyRect[1] = fons__mini(stash->dirtyRect[1], glyph->y0);
- stash->dirtyRect[2] = fons__maxi(stash->dirtyRect[2], glyph->x1);
- stash->dirtyRect[3] = fons__maxi(stash->dirtyRect[3], glyph->y1);
-
- return glyph;
-}
-
-static void fons__getQuad(FONScontext* stash, FONSfont* font,
- int prevGlyphIndex, FONSglyph* glyph,
- float scale, float spacing, float* x, float* y, FONSquad* q)
-{
- float rx,ry,xoff,yoff,x0,y0,x1,y1;
-
- if (prevGlyphIndex != -1) {
- float adv = fons__tt_getGlyphKernAdvance(&font->font, prevGlyphIndex, glyph->index) * scale;
- *x += (int)(adv + spacing + 0.5f);
- }
-
- // Each glyph has 2px border to allow good interpolation,
- // one pixel to prevent leaking, and one to allow good interpolation for rendering.
- // Inset the texture region by one pixel for correct interpolation.
- xoff = (short)(glyph->xoff+1);
- yoff = (short)(glyph->yoff+1);
- x0 = (float)(glyph->x0+1);
- y0 = (float)(glyph->y0+1);
- x1 = (float)(glyph->x1-1);
- y1 = (float)(glyph->y1-1);
-
- if (stash->params.flags & FONS_ZERO_TOPLEFT) {
- rx = (float)(int)(*x + xoff);
- ry = (float)(int)(*y + yoff);
-
- q->x0 = rx;
- q->y0 = ry;
- q->x1 = rx + x1 - x0;
- q->y1 = ry + y1 - y0;
-
- q->s0 = x0 * stash->itw;
- q->t0 = y0 * stash->ith;
- q->s1 = x1 * stash->itw;
- q->t1 = y1 * stash->ith;
- } else {
- rx = (float)(int)(*x + xoff);
- ry = (float)(int)(*y - yoff);
-
- q->x0 = rx;
- q->y0 = ry;
- q->x1 = rx + x1 - x0;
- q->y1 = ry - y1 + y0;
-
- q->s0 = x0 * stash->itw;
- q->t0 = y0 * stash->ith;
- q->s1 = x1 * stash->itw;
- q->t1 = y1 * stash->ith;
- }
-
- *x += (int)(glyph->xadv / 10.0f + 0.5f);
-}
-
-static void fons__flush(FONScontext* stash)
-{
- // Flush texture
- if (stash->dirtyRect[0] < stash->dirtyRect[2] && stash->dirtyRect[1] < stash->dirtyRect[3]) {
- if (stash->params.renderUpdate != NULL)
- stash->params.renderUpdate(stash->params.userPtr, stash->dirtyRect, stash->texData);
- // Reset dirty rect
- stash->dirtyRect[0] = stash->params.width;
- stash->dirtyRect[1] = stash->params.height;
- stash->dirtyRect[2] = 0;
- stash->dirtyRect[3] = 0;
- }
-
- // Flush triangles
- if (stash->nverts > 0) {
- if (stash->params.renderDraw != NULL)
- stash->params.renderDraw(stash->params.userPtr, stash->verts, stash->tcoords, stash->colors, stash->nverts);
- stash->nverts = 0;
- }
-}
-
-static __inline void fons__vertex(FONScontext* stash, float x, float y, float s, float t, unsigned int c)
-{
- stash->verts[stash->nverts*2+0] = x;
- stash->verts[stash->nverts*2+1] = y;
- stash->tcoords[stash->nverts*2+0] = s;
- stash->tcoords[stash->nverts*2+1] = t;
- stash->colors[stash->nverts] = c;
- stash->nverts++;
-}
-
-static float fons__getVertAlign(FONScontext* stash, FONSfont* font, int align, short isize)
-{
- if (stash->params.flags & FONS_ZERO_TOPLEFT) {
- if (align & FONS_ALIGN_TOP) {
- return font->ascender * (float)isize/10.0f;
- } else if (align & FONS_ALIGN_MIDDLE) {
- return (font->ascender + font->descender) / 2.0f * (float)isize/10.0f;
- } else if (align & FONS_ALIGN_BASELINE) {
- return 0.0f;
- } else if (align & FONS_ALIGN_BOTTOM) {
- return font->descender * (float)isize/10.0f;
- }
- } else {
- if (align & FONS_ALIGN_TOP) {
- return -font->ascender * (float)isize/10.0f;
- } else if (align & FONS_ALIGN_MIDDLE) {
- return -(font->ascender + font->descender) / 2.0f * (float)isize/10.0f;
- } else if (align & FONS_ALIGN_BASELINE) {
- return 0.0f;
- } else if (align & FONS_ALIGN_BOTTOM) {
- return -font->descender * (float)isize/10.0f;
- }
- }
- return 0.0;
-}
-
-float fonsDrawText(FONScontext* stash,
- float x, float y,
- const char* str, const char* end)
-{
- FONSstate* state = fons__getState(stash);
- unsigned int codepoint;
- unsigned int utf8state = 0;
- FONSglyph* glyph = NULL;
- FONSquad q;
- int prevGlyphIndex = -1;
- short isize = (short)(state->size*10.0f);
- short iblur = (short)state->blur;
- float scale;
- FONSfont* font;
- float width;
-
- if (stash == NULL) return x;
- if (state->font < 0 || state->font >= stash->nfonts) return x;
- font = stash->fonts[state->font];
- if (font->data == NULL) return x;
-
- scale = fons__tt_getPixelHeightScale(&font->font, (float)isize/10.0f);
-
- if (end == NULL)
- end = str + strlen(str);
-
- // Align horizontally
- if (state->align & FONS_ALIGN_LEFT) {
- // empty
- } else if (state->align & FONS_ALIGN_RIGHT) {
- width = fonsTextBounds(stash, x,y, str, end, NULL);
- x -= width;
- } else if (state->align & FONS_ALIGN_CENTER) {
- width = fonsTextBounds(stash, x,y, str, end, NULL);
- x -= width * 0.5f;
- }
- // Align vertically.
- y += fons__getVertAlign(stash, font, state->align, isize);
-
- for (; str != end; ++str) {
- if (fons__decutf8(&utf8state, &codepoint, *(const unsigned char*)str))
- continue;
- glyph = fons__getGlyph(stash, font, codepoint, isize, iblur);
- if (glyph != NULL) {
- fons__getQuad(stash, font, prevGlyphIndex, glyph, scale, state->spacing, &x, &y, &q);
-
- if (stash->nverts+6 > FONS_VERTEX_COUNT)
- fons__flush(stash);
-
- fons__vertex(stash, q.x0, q.y0, q.s0, q.t0, state->color);
- fons__vertex(stash, q.x1, q.y1, q.s1, q.t1, state->color);
- fons__vertex(stash, q.x1, q.y0, q.s1, q.t0, state->color);
-
- fons__vertex(stash, q.x0, q.y0, q.s0, q.t0, state->color);
- fons__vertex(stash, q.x0, q.y1, q.s0, q.t1, state->color);
- fons__vertex(stash, q.x1, q.y1, q.s1, q.t1, state->color);
- }
- prevGlyphIndex = glyph != NULL ? glyph->index : -1;
- }
- fons__flush(stash);
-
- return x;
-}
-
-int fonsTextIterInit(FONScontext* stash, FONStextIter* iter,
- float x, float y, const char* str, const char* end)
-{
- FONSstate* state = fons__getState(stash);
- float width;
-
- memset(iter, 0, sizeof(*iter));
-
- if (stash == NULL) return 0;
- if (state->font < 0 || state->font >= stash->nfonts) return 0;
- iter->font = stash->fonts[state->font];
- if (iter->font->data == NULL) return 0;
-
- iter->isize = (short)(state->size*10.0f);
- iter->iblur = (short)state->blur;
- iter->scale = fons__tt_getPixelHeightScale(&iter->font->font, (float)iter->isize/10.0f);
-
- // Align horizontally
- if (state->align & FONS_ALIGN_LEFT) {
- // empty
- } else if (state->align & FONS_ALIGN_RIGHT) {
- width = fonsTextBounds(stash, x,y, str, end, NULL);
- x -= width;
- } else if (state->align & FONS_ALIGN_CENTER) {
- width = fonsTextBounds(stash, x,y, str, end, NULL);
- x -= width * 0.5f;
- }
- // Align vertically.
- y += fons__getVertAlign(stash, iter->font, state->align, iter->isize);
-
- if (end == NULL)
- end = str + strlen(str);
-
- iter->x = iter->nextx = x;
- iter->y = iter->nexty = y;
- iter->spacing = state->spacing;
- iter->str = str;
- iter->next = str;
- iter->end = end;
- iter->codepoint = 0;
- iter->prevGlyphIndex = -1;
-
- return 1;
-}
-
-int fonsTextIterNext(FONScontext* stash, FONStextIter* iter, FONSquad* quad)
-{
- FONSglyph* glyph = NULL;
- const char* str = iter->next;
- iter->str = iter->next;
-
- if (str == iter->end)
- return 0;
-
- for (; str != iter->end; str++) {
- if (fons__decutf8(&iter->utf8state, &iter->codepoint, *(const unsigned char*)str))
- continue;
- str++;
- // Get glyph and quad
- iter->x = iter->nextx;
- iter->y = iter->nexty;
- glyph = fons__getGlyph(stash, iter->font, iter->codepoint, iter->isize, iter->iblur);
- if (glyph != NULL)
- fons__getQuad(stash, iter->font, iter->prevGlyphIndex, glyph, iter->scale, iter->spacing, &iter->nextx, &iter->nexty, quad);
- iter->prevGlyphIndex = glyph != NULL ? glyph->index : -1;
- break;
- }
- iter->next = str;
-
- return 1;
-}
-
-void fonsDrawDebug(FONScontext* stash, float x, float y)
-{
- int i;
- int w = stash->params.width;
- int h = stash->params.height;
- float u = w == 0 ? 0 : (1.0f / w);
- float v = h == 0 ? 0 : (1.0f / h);
-
- if (stash->nverts+6+6 > FONS_VERTEX_COUNT)
- fons__flush(stash);
-
- // Draw background
- fons__vertex(stash, x+0, y+0, u, v, 0x0fffffff);
- fons__vertex(stash, x+w, y+h, u, v, 0x0fffffff);
- fons__vertex(stash, x+w, y+0, u, v, 0x0fffffff);
-
- fons__vertex(stash, x+0, y+0, u, v, 0x0fffffff);
- fons__vertex(stash, x+0, y+h, u, v, 0x0fffffff);
- fons__vertex(stash, x+w, y+h, u, v, 0x0fffffff);
-
- // Draw texture
- fons__vertex(stash, x+0, y+0, 0, 0, 0xffffffff);
- fons__vertex(stash, x+w, y+h, 1, 1, 0xffffffff);
- fons__vertex(stash, x+w, y+0, 1, 0, 0xffffffff);
-
- fons__vertex(stash, x+0, y+0, 0, 0, 0xffffffff);
- fons__vertex(stash, x+0, y+h, 0, 1, 0xffffffff);
- fons__vertex(stash, x+w, y+h, 1, 1, 0xffffffff);
-
- // Drawbug draw atlas
- for (i = 0; i < stash->atlas->nnodes; i++) {
- FONSatlasNode* n = &stash->atlas->nodes[i];
-
- if (stash->nverts+6 > FONS_VERTEX_COUNT)
- fons__flush(stash);
-
- fons__vertex(stash, x+n->x+0, y+n->y+0, u, v, 0xc00000ff);
- fons__vertex(stash, x+n->x+n->width, y+n->y+1, u, v, 0xc00000ff);
- fons__vertex(stash, x+n->x+n->width, y+n->y+0, u, v, 0xc00000ff);
-
- fons__vertex(stash, x+n->x+0, y+n->y+0, u, v, 0xc00000ff);
- fons__vertex(stash, x+n->x+0, y+n->y+1, u, v, 0xc00000ff);
- fons__vertex(stash, x+n->x+n->width, y+n->y+1, u, v, 0xc00000ff);
- }
-
- fons__flush(stash);
-}
-
-float fonsTextBounds(FONScontext* stash,
- float x, float y,
- const char* str, const char* end,
- float* bounds)
-{
- FONSstate* state = fons__getState(stash);
- unsigned int codepoint;
- unsigned int utf8state = 0;
- FONSquad q;
- FONSglyph* glyph = NULL;
- int prevGlyphIndex = -1;
- short isize = (short)(state->size*10.0f);
- short iblur = (short)state->blur;
- float scale;
- FONSfont* font;
- float startx, advance;
- float minx, miny, maxx, maxy;
-
- if (stash == NULL) return 0;
- if (state->font < 0 || state->font >= stash->nfonts) return 0;
- font = stash->fonts[state->font];
- if (font->data == NULL) return 0;
-
- scale = fons__tt_getPixelHeightScale(&font->font, (float)isize/10.0f);
-
- // Align vertically.
- y += fons__getVertAlign(stash, font, state->align, isize);
-
- minx = maxx = x;
- miny = maxy = y;
- startx = x;
-
- if (end == NULL)
- end = str + strlen(str);
-
- for (; str != end; ++str) {
- if (fons__decutf8(&utf8state, &codepoint, *(const unsigned char*)str))
- continue;
- glyph = fons__getGlyph(stash, font, codepoint, isize, iblur);
- if (glyph != NULL) {
- fons__getQuad(stash, font, prevGlyphIndex, glyph, scale, state->spacing, &x, &y, &q);
- if (q.x0 < minx) minx = q.x0;
- if (q.x1 > maxx) maxx = q.x1;
- if (stash->params.flags & FONS_ZERO_TOPLEFT) {
- if (q.y0 < miny) miny = q.y0;
- if (q.y1 > maxy) maxy = q.y1;
- } else {
- if (q.y1 < miny) miny = q.y1;
- if (q.y0 > maxy) maxy = q.y0;
- }
- }
- prevGlyphIndex = glyph != NULL ? glyph->index : -1;
- }
-
- advance = x - startx;
-
- // Align horizontally
- if (state->align & FONS_ALIGN_LEFT) {
- // empty
- } else if (state->align & FONS_ALIGN_RIGHT) {
- minx -= advance;
- maxx -= advance;
- } else if (state->align & FONS_ALIGN_CENTER) {
- minx -= advance * 0.5f;
- maxx -= advance * 0.5f;
- }
-
- if (bounds) {
- bounds[0] = minx;
- bounds[1] = miny;
- bounds[2] = maxx;
- bounds[3] = maxy;
- }
-
- return advance;
-}
-
-void fonsVertMetrics(FONScontext* stash,
- float* ascender, float* descender, float* lineh)
-{
- FONSfont* font;
- FONSstate* state = fons__getState(stash);
- short isize;
-
- if (stash == NULL) return;
- if (state->font < 0 || state->font >= stash->nfonts) return;
- font = stash->fonts[state->font];
- isize = (short)(state->size*10.0f);
- if (font->data == NULL) return;
-
- if (ascender)
- *ascender = font->ascender*isize/10.0f;
- if (descender)
- *descender = font->descender*isize/10.0f;
- if (lineh)
- *lineh = font->lineh*isize/10.0f;
-}
-
-void fonsLineBounds(FONScontext* stash, float y, float* miny, float* maxy)
-{
- FONSfont* font;
- FONSstate* state = fons__getState(stash);
- short isize;
-
- if (stash == NULL) return;
- if (state->font < 0 || state->font >= stash->nfonts) return;
- font = stash->fonts[state->font];
- isize = (short)(state->size*10.0f);
- if (font->data == NULL) return;
-
- y += fons__getVertAlign(stash, font, state->align, isize);
-
- if (stash->params.flags & FONS_ZERO_TOPLEFT) {
- *miny = y - font->ascender * (float)isize/10.0f;
- *maxy = *miny + font->lineh*isize/10.0f;
- } else {
- *maxy = y + font->descender * (float)isize/10.0f;
- *miny = *maxy - font->lineh*isize/10.0f;
- }
-}
-
-const unsigned char* fonsGetTextureData(FONScontext* stash, int* width, int* height)
-{
- if (width != NULL)
- *width = stash->params.width;
- if (height != NULL)
- *height = stash->params.height;
- return stash->texData;
-}
-
-int fonsValidateTexture(FONScontext* stash, int* dirty)
-{
- if (stash->dirtyRect[0] < stash->dirtyRect[2] && stash->dirtyRect[1] < stash->dirtyRect[3]) {
- dirty[0] = stash->dirtyRect[0];
- dirty[1] = stash->dirtyRect[1];
- dirty[2] = stash->dirtyRect[2];
- dirty[3] = stash->dirtyRect[3];
- // Reset dirty rect
- stash->dirtyRect[0] = stash->params.width;
- stash->dirtyRect[1] = stash->params.height;
- stash->dirtyRect[2] = 0;
- stash->dirtyRect[3] = 0;
- return 1;
- }
- return 0;
-}
-
-void fonsDeleteInternal(FONScontext* stash)
-{
- int i;
- if (stash == NULL) return;
-
- if (stash->params.renderDelete)
- stash->params.renderDelete(stash->params.userPtr);
-
- for (i = 0; i < stash->nfonts; ++i)
- fons__freeFont(stash->fonts[i]);
-
- if (stash->atlas) fons__deleteAtlas(stash->atlas);
- if (stash->fonts) free(stash->fonts);
- if (stash->texData) free(stash->texData);
- if (stash->scratch) free(stash->scratch);
- free(stash);
-}
-
-void fonsSetErrorCallback(FONScontext* stash, void (*callback)(void* uptr, int error, int val), void* uptr)
-{
- if (stash == NULL) return;
- stash->handleError = callback;
- stash->errorUptr = uptr;
-}
-
-void fonsGetAtlasSize(FONScontext* stash, int* width, int* height)
-{
- if (stash == NULL) return;
- *width = stash->params.width;
- *height = stash->params.height;
-}
-
-int fonsExpandAtlas(FONScontext* stash, int width, int height)
-{
- int i, maxy = 0;
- unsigned char* data = NULL;
- if (stash == NULL) return 0;
-
- width = fons__maxi(width, stash->params.width);
- height = fons__maxi(height, stash->params.height);
-
- if (width == stash->params.width && height == stash->params.height)
- return 1;
-
- // Flush pending glyphs.
- fons__flush(stash);
-
- // Create new texture
- if (stash->params.renderResize != NULL) {
- if (stash->params.renderResize(stash->params.userPtr, width, height) == 0)
- return 0;
- }
- // Copy old texture data over.
- data = (unsigned char*)malloc(width * height);
- if (data == NULL)
- return 0;
- for (i = 0; i < stash->params.height; i++) {
- unsigned char* dst = &data[i*width];
- unsigned char* src = &stash->texData[i*stash->params.width];
- memcpy(dst, src, stash->params.width);
- if (width > stash->params.width)
- memset(dst+stash->params.width, 0, width - stash->params.width);
- }
- if (height > stash->params.height)
- memset(&data[stash->params.height * width], 0, (height - stash->params.height) * width);
-
- free(stash->texData);
- stash->texData = data;
-
- // Increase atlas size
- fons__atlasExpand(stash->atlas, width, height);
-
- // Add existing data as dirty.
- for (i = 0; i < stash->atlas->nnodes; i++)
- maxy = fons__maxi(maxy, stash->atlas->nodes[i].y);
- stash->dirtyRect[0] = 0;
- stash->dirtyRect[1] = 0;
- stash->dirtyRect[2] = stash->params.width;
- stash->dirtyRect[3] = maxy;
-
- stash->params.width = width;
- stash->params.height = height;
- stash->itw = 1.0f/stash->params.width;
- stash->ith = 1.0f/stash->params.height;
-
- return 1;
-}
-
-int fonsResetAtlas(FONScontext* stash, int width, int height)
-{
- int i, j;
- if (stash == NULL) return 0;
-
- // Flush pending glyphs.
- fons__flush(stash);
-
- // Create new texture
- if (stash->params.renderResize != NULL) {
- if (stash->params.renderResize(stash->params.userPtr, width, height) == 0)
- return 0;
- }
-
- // Reset atlas
- fons__atlasReset(stash->atlas, width, height);
-
- // Clear texture data.
- stash->texData = (unsigned char*)realloc(stash->texData, width * height);
- if (stash->texData == NULL) return 0;
- memset(stash->texData, 0, width * height);
-
- // Reset dirty rect
- stash->dirtyRect[0] = width;
- stash->dirtyRect[1] = height;
- stash->dirtyRect[2] = 0;
- stash->dirtyRect[3] = 0;
-
- // Reset cached glyphs
- for (i = 0; i < stash->nfonts; i++) {
- FONSfont* font = stash->fonts[i];
- font->nglyphs = 0;
- for (j = 0; j < FONS_HASH_LUT_SIZE; j++)
- font->lut[j] = -1;
- }
-
- stash->params.width = width;
- stash->params.height = height;
- stash->itw = 1.0f/stash->params.width;
- stash->ith = 1.0f/stash->params.height;
-
- // Add white rect at 0,0 for debug drawing.
- fons__addWhiteRect(stash, 2,2);
-
- return 1;
-}
-
-
-#endif
diff --git a/dgl/src/nanovg2/nanovg.c b/dgl/src/nanovg2/nanovg.c
@@ -1,2752 +0,0 @@
-//
-// Copyright (c) 2013 Mikko Mononen memon@inside.org
-//
-// This software is provided 'as-is', without any express or implied
-// warranty. In no event will the authors be held liable for any damages
-// arising from the use of this software.
-// Permission is granted to anyone to use this software for any purpose,
-// including commercial applications, and to alter it and redistribute it
-// freely, subject to the following restrictions:
-// 1. The origin of this software must not be misrepresented; you must not
-// claim that you wrote the original software. If you use this software
-// in a product, an acknowledgment in the product documentation would be
-// appreciated but is not required.
-// 2. Altered source versions must be plainly marked as such, and must not be
-// misrepresented as being the original software.
-// 3. This notice may not be removed or altered from any source distribution.
-//
-
-#include <stdio.h>
-#include <math.h>
-#include "nanovg.h"
-#define FONTSTASH_IMPLEMENTATION
-#include "fontstash.h"
-#define STB_IMAGE_IMPLEMENTATION
-#include "stb_image.h"
-
-#ifdef _MSC_VER
-#pragma warning(disable: 4100) // unreferenced formal parameter
-#pragma warning(disable: 4127) // conditional expression is constant
-#pragma warning(disable: 4204) // nonstandard extension used : non-constant aggregate initializer
-#pragma warning(disable: 4706) // assignment within conditional expression
-#endif
-
-#define NVG_INIT_FONTIMAGE_SIZE 512
-#define NVG_MAX_FONTIMAGE_SIZE 2048
-#define NVG_MAX_FONTIMAGES 4
-
-#define NVG_INIT_COMMANDS_SIZE 256
-#define NVG_INIT_POINTS_SIZE 128
-#define NVG_INIT_PATHS_SIZE 16
-#define NVG_INIT_VERTS_SIZE 256
-#define NVG_MAX_STATES 32
-
-#define NVG_KAPPA90 0.5522847493f // Length proportional to radius of a cubic bezier handle for 90deg arcs.
-
-#define NVG_COUNTOF(arr) (sizeof(arr) / sizeof(0[arr]))
-
-
-enum NVGcommands {
- NVG_MOVETO = 0,
- NVG_LINETO = 1,
- NVG_BEZIERTO = 2,
- NVG_CLOSE = 3,
- NVG_WINDING = 4,
-};
-
-enum NVGpointFlags
-{
- NVG_PT_CORNER = 0x01,
- NVG_PT_LEFT = 0x02,
- NVG_PT_BEVEL = 0x04,
- NVG_PR_INNERBEVEL = 0x08,
-};
-
-struct NVGstate {
- NVGpaint fill;
- NVGpaint stroke;
- float strokeWidth;
- float miterLimit;
- int lineJoin;
- int lineCap;
- float alpha;
- float xform[6];
- NVGscissor scissor;
- float fontSize;
- float letterSpacing;
- float lineHeight;
- float fontBlur;
- int textAlign;
- int fontId;
-};
-typedef struct NVGstate NVGstate;
-
-struct NVGpoint {
- float x,y;
- float dx, dy;
- float len;
- float dmx, dmy;
- unsigned char flags;
-};
-typedef struct NVGpoint NVGpoint;
-
-struct NVGpathCache {
- NVGpoint* points;
- int npoints;
- int cpoints;
- NVGpath* paths;
- int npaths;
- int cpaths;
- NVGvertex* verts;
- int nverts;
- int cverts;
- float bounds[4];
-};
-typedef struct NVGpathCache NVGpathCache;
-
-struct NVGcontext {
- NVGparams params;
- float* commands;
- int ccommands;
- int ncommands;
- float commandx, commandy;
- NVGstate states[NVG_MAX_STATES];
- int nstates;
- NVGpathCache* cache;
- float tessTol;
- float distTol;
- float fringeWidth;
- float devicePxRatio;
- struct FONScontext* fs;
- int fontImages[NVG_MAX_FONTIMAGES];
- int fontImageIdx;
- int drawCallCount;
- int fillTriCount;
- int strokeTriCount;
- int textTriCount;
-};
-
-static float nvg__sqrtf(float a) { return sqrtf(a); }
-static float nvg__modf(float a, float b) { return fmodf(a, b); }
-static float nvg__sinf(float a) { return sinf(a); }
-static float nvg__cosf(float a) { return cosf(a); }
-static float nvg__tanf(float a) { return tanf(a); }
-static float nvg__atan2f(float a,float b) { return atan2f(a, b); }
-static float nvg__acosf(float a) { return acosf(a); }
-
-static int nvg__mini(int a, int b) { return a < b ? a : b; }
-static int nvg__maxi(int a, int b) { return a > b ? a : b; }
-static int nvg__clampi(int a, int mn, int mx) { return a < mn ? mn : (a > mx ? mx : a); }
-static float nvg__minf(float a, float b) { return a < b ? a : b; }
-static float nvg__maxf(float a, float b) { return a > b ? a : b; }
-static float nvg__absf(float a) { return a >= 0.0f ? a : -a; }
-static float nvg__signf(float a) { return a >= 0.0f ? 1.0f : -1.0f; }
-static float nvg__clampf(float a, float mn, float mx) { return a < mn ? mn : (a > mx ? mx : a); }
-static float nvg__cross(float dx0, float dy0, float dx1, float dy1) { return dx1*dy0 - dx0*dy1; }
-
-static float nvg__normalize(float *x, float* y)
-{
- float d = nvg__sqrtf((*x)*(*x) + (*y)*(*y));
- if (d > 1e-6f) {
- float id = 1.0f / d;
- *x *= id;
- *y *= id;
- }
- return d;
-}
-
-
-static void nvg__deletePathCache(NVGpathCache* c)
-{
- if (c == NULL) return;
- if (c->points != NULL) free(c->points);
- if (c->paths != NULL) free(c->paths);
- if (c->verts != NULL) free(c->verts);
- free(c);
-}
-
-static NVGpathCache* nvg__allocPathCache(void)
-{
- NVGpathCache* c = (NVGpathCache*)malloc(sizeof(NVGpathCache));
- if (c == NULL) goto error;
- memset(c, 0, sizeof(NVGpathCache));
-
- c->points = (NVGpoint*)malloc(sizeof(NVGpoint)*NVG_INIT_POINTS_SIZE);
- if (!c->points) goto error;
- c->npoints = 0;
- c->cpoints = NVG_INIT_POINTS_SIZE;
-
- c->paths = (NVGpath*)malloc(sizeof(NVGpath)*NVG_INIT_PATHS_SIZE);
- if (!c->paths) goto error;
- c->npaths = 0;
- c->cpaths = NVG_INIT_PATHS_SIZE;
-
- c->verts = (NVGvertex*)malloc(sizeof(NVGvertex)*NVG_INIT_VERTS_SIZE);
- if (!c->verts) goto error;
- c->nverts = 0;
- c->cverts = NVG_INIT_VERTS_SIZE;
-
- return c;
-error:
- nvg__deletePathCache(c);
- return NULL;
-}
-
-static void nvg__setDevicePixelRatio(NVGcontext* ctx, float ratio)
-{
- ctx->tessTol = 0.25f / ratio;
- ctx->distTol = 0.01f / ratio;
- ctx->fringeWidth = 1.0f / ratio;
- ctx->devicePxRatio = ratio;
-}
-
-NVGcontext* nvgCreateInternal(NVGparams* params)
-{
- FONSparams fontParams;
- NVGcontext* ctx = (NVGcontext*)malloc(sizeof(NVGcontext));
- int i;
- if (ctx == NULL) goto error;
- memset(ctx, 0, sizeof(NVGcontext));
-
- ctx->params = *params;
- for (i = 0; i < NVG_MAX_FONTIMAGES; i++)
- ctx->fontImages[i] = 0;
-
- ctx->commands = (float*)malloc(sizeof(float)*NVG_INIT_COMMANDS_SIZE);
- if (!ctx->commands) goto error;
- ctx->ncommands = 0;
- ctx->ccommands = NVG_INIT_COMMANDS_SIZE;
-
- ctx->cache = nvg__allocPathCache();
- if (ctx->cache == NULL) goto error;
-
- nvgSave(ctx);
- nvgReset(ctx);
-
- nvg__setDevicePixelRatio(ctx, 1.0f);
-
- if (ctx->params.renderCreate(ctx->params.userPtr) == 0) goto error;
-
- // Init font rendering
- memset(&fontParams, 0, sizeof(fontParams));
- fontParams.width = NVG_INIT_FONTIMAGE_SIZE;
- fontParams.height = NVG_INIT_FONTIMAGE_SIZE;
- fontParams.flags = FONS_ZERO_TOPLEFT;
- fontParams.renderCreate = NULL;
- fontParams.renderUpdate = NULL;
- fontParams.renderDraw = NULL;
- fontParams.renderDelete = NULL;
- fontParams.userPtr = NULL;
- ctx->fs = fonsCreateInternal(&fontParams);
- if (ctx->fs == NULL) goto error;
-
- // Create font texture
- ctx->fontImages[0] = ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_ALPHA, fontParams.width, fontParams.height, 0, NULL);
- if (ctx->fontImages[0] == 0) goto error;
- ctx->fontImageIdx = 0;
-
- return ctx;
-
-error:
- nvgDeleteInternal(ctx);
- return 0;
-}
-
-NVGparams* nvgInternalParams(NVGcontext* ctx)
-{
- return &ctx->params;
-}
-
-void nvgDeleteInternal(NVGcontext* ctx)
-{
- int i;
- if (ctx == NULL) return;
- if (ctx->commands != NULL) free(ctx->commands);
- if (ctx->cache != NULL) nvg__deletePathCache(ctx->cache);
-
- if (ctx->fs)
- fonsDeleteInternal(ctx->fs);
-
- for (i = 0; i < NVG_MAX_FONTIMAGES; i++) {
- if (ctx->fontImages[i] != 0) {
- nvgDeleteImage(ctx, ctx->fontImages[i]);
- ctx->fontImages[i] = 0;
- }
- }
-
- if (ctx->params.renderDelete != NULL)
- ctx->params.renderDelete(ctx->params.userPtr);
-
- free(ctx);
-}
-
-void nvgBeginFrame(NVGcontext* ctx, int windowWidth, int windowHeight, float devicePixelRatio)
-{
-/* printf("Tris: draws:%d fill:%d stroke:%d text:%d TOT:%d\n",
- ctx->drawCallCount, ctx->fillTriCount, ctx->strokeTriCount, ctx->textTriCount,
- ctx->fillTriCount+ctx->strokeTriCount+ctx->textTriCount);*/
-
- ctx->nstates = 0;
- nvgSave(ctx);
- nvgReset(ctx);
-
- nvg__setDevicePixelRatio(ctx, devicePixelRatio);
-
- ctx->params.renderViewport(ctx->params.userPtr, windowWidth, windowHeight);
-
- ctx->drawCallCount = 0;
- ctx->fillTriCount = 0;
- ctx->strokeTriCount = 0;
- ctx->textTriCount = 0;
-}
-
-void nvgCancelFrame(NVGcontext* ctx)
-{
- ctx->params.renderCancel(ctx->params.userPtr);
-}
-
-void nvgEndFrame(NVGcontext* ctx)
-{
- ctx->params.renderFlush(ctx->params.userPtr);
- if (ctx->fontImageIdx != 0) {
- int fontImage = ctx->fontImages[ctx->fontImageIdx];
- int i, j, iw, ih;
- // delete images that smaller than current one
- if (fontImage == 0)
- return;
- nvgImageSize(ctx, fontImage, &iw, &ih);
- for (i = j = 0; i < ctx->fontImageIdx; i++) {
- if (ctx->fontImages[i] != 0) {
- int nw, nh;
- nvgImageSize(ctx, ctx->fontImages[i], &nw, &nh);
- if (nw < iw || nh < ih)
- nvgDeleteImage(ctx, ctx->fontImages[i]);
- else
- ctx->fontImages[j++] = ctx->fontImages[i];
- }
- }
- // make current font image to first
- ctx->fontImages[j++] = ctx->fontImages[0];
- ctx->fontImages[0] = fontImage;
- ctx->fontImageIdx = 0;
- // clear all images after j
- for (i = j; i < NVG_MAX_FONTIMAGES; i++)
- ctx->fontImages[i] = 0;
- }
-}
-
-NVGcolor nvgRGB(unsigned char r, unsigned char g, unsigned char b)
-{
- return nvgRGBA(r,g,b,255);
-}
-
-NVGcolor nvgRGBf(float r, float g, float b)
-{
- return nvgRGBAf(r,g,b,1.0f);
-}
-
-NVGcolor nvgRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
-{
- NVGcolor color;
- // Use longer initialization to suppress warning.
- color.r = r / 255.0f;
- color.g = g / 255.0f;
- color.b = b / 255.0f;
- color.a = a / 255.0f;
- return color;
-}
-
-NVGcolor nvgRGBAf(float r, float g, float b, float a)
-{
- NVGcolor color;
- // Use longer initialization to suppress warning.
- color.r = r;
- color.g = g;
- color.b = b;
- color.a = a;
- return color;
-}
-
-NVGcolor nvgTransRGBA(NVGcolor c, unsigned char a)
-{
- c.a = a / 255.0f;
- return c;
-}
-
-NVGcolor nvgTransRGBAf(NVGcolor c, float a)
-{
- c.a = a;
- return c;
-}
-
-NVGcolor nvgLerpRGBA(NVGcolor c0, NVGcolor c1, float u)
-{
- int i;
- float oneminu;
- NVGcolor cint;
-
- u = nvg__clampf(u, 0.0f, 1.0f);
- oneminu = 1.0f - u;
- for( i = 0; i <4; i++ )
- {
- cint.rgba[i] = c0.rgba[i] * oneminu + c1.rgba[i] * u;
- }
-
- return cint;
-}
-
-NVGcolor nvgHSL(float h, float s, float l)
-{
- return nvgHSLA(h,s,l,255);
-}
-
-static float nvg__hue(float h, float m1, float m2)
-{
- if (h < 0) h += 1;
- if (h > 1) h -= 1;
- if (h < 1.0f/6.0f)
- return m1 + (m2 - m1) * h * 6.0f;
- else if (h < 3.0f/6.0f)
- return m2;
- else if (h < 4.0f/6.0f)
- return m1 + (m2 - m1) * (2.0f/3.0f - h) * 6.0f;
- return m1;
-}
-
-NVGcolor nvgHSLA(float h, float s, float l, unsigned char a)
-{
- float m1, m2;
- NVGcolor col;
- h = nvg__modf(h, 1.0f);
- if (h < 0.0f) h += 1.0f;
- s = nvg__clampf(s, 0.0f, 1.0f);
- l = nvg__clampf(l, 0.0f, 1.0f);
- m2 = l <= 0.5f ? (l * (1 + s)) : (l + s - l * s);
- m1 = 2 * l - m2;
- col.r = nvg__clampf(nvg__hue(h + 1.0f/3.0f, m1, m2), 0.0f, 1.0f);
- col.g = nvg__clampf(nvg__hue(h, m1, m2), 0.0f, 1.0f);
- col.b = nvg__clampf(nvg__hue(h - 1.0f/3.0f, m1, m2), 0.0f, 1.0f);
- col.a = a/255.0f;
- return col;
-}
-
-
-static NVGstate* nvg__getState(NVGcontext* ctx)
-{
- return &ctx->states[ctx->nstates-1];
-}
-
-void nvgTransformIdentity(float* t)
-{
- t[0] = 1.0f; t[1] = 0.0f;
- t[2] = 0.0f; t[3] = 1.0f;
- t[4] = 0.0f; t[5] = 0.0f;
-}
-
-void nvgTransformTranslate(float* t, float tx, float ty)
-{
- t[0] = 1.0f; t[1] = 0.0f;
- t[2] = 0.0f; t[3] = 1.0f;
- t[4] = tx; t[5] = ty;
-}
-
-void nvgTransformScale(float* t, float sx, float sy)
-{
- t[0] = sx; t[1] = 0.0f;
- t[2] = 0.0f; t[3] = sy;
- t[4] = 0.0f; t[5] = 0.0f;
-}
-
-void nvgTransformRotate(float* t, float a)
-{
- float cs = nvg__cosf(a), sn = nvg__sinf(a);
- t[0] = cs; t[1] = sn;
- t[2] = -sn; t[3] = cs;
- t[4] = 0.0f; t[5] = 0.0f;
-}
-
-void nvgTransformSkewX(float* t, float a)
-{
- t[0] = 1.0f; t[1] = 0.0f;
- t[2] = nvg__tanf(a); t[3] = 1.0f;
- t[4] = 0.0f; t[5] = 0.0f;
-}
-
-void nvgTransformSkewY(float* t, float a)
-{
- t[0] = 1.0f; t[1] = nvg__tanf(a);
- t[2] = 0.0f; t[3] = 1.0f;
- t[4] = 0.0f; t[5] = 0.0f;
-}
-
-void nvgTransformMultiply(float* t, const float* s)
-{
- float t0 = t[0] * s[0] + t[1] * s[2];
- float t2 = t[2] * s[0] + t[3] * s[2];
- float t4 = t[4] * s[0] + t[5] * s[2] + s[4];
- t[1] = t[0] * s[1] + t[1] * s[3];
- t[3] = t[2] * s[1] + t[3] * s[3];
- t[5] = t[4] * s[1] + t[5] * s[3] + s[5];
- t[0] = t0;
- t[2] = t2;
- t[4] = t4;
-}
-
-void nvgTransformPremultiply(float* t, const float* s)
-{
- float s2[6];
- memcpy(s2, s, sizeof(float)*6);
- nvgTransformMultiply(s2, t);
- memcpy(t, s2, sizeof(float)*6);
-}
-
-int nvgTransformInverse(float* inv, const float* t)
-{
- double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1];
- if (det > -1e-6 && det < 1e-6) {
- nvgTransformIdentity(inv);
- return 0;
- }
- invdet = 1.0 / det;
- inv[0] = (float)(t[3] * invdet);
- inv[2] = (float)(-t[2] * invdet);
- inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet);
- inv[1] = (float)(-t[1] * invdet);
- inv[3] = (float)(t[0] * invdet);
- inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet);
- return 1;
-}
-
-void nvgTransformPoint(float* dx, float* dy, const float* t, float sx, float sy)
-{
- *dx = sx*t[0] + sy*t[2] + t[4];
- *dy = sx*t[1] + sy*t[3] + t[5];
-}
-
-float nvgDegToRad(float deg)
-{
- return deg / 180.0f * NVG_PI;
-}
-
-float nvgRadToDeg(float rad)
-{
- return rad / NVG_PI * 180.0f;
-}
-
-static void nvg__setPaintColor(NVGpaint* p, NVGcolor color)
-{
- memset(p, 0, sizeof(*p));
- nvgTransformIdentity(p->xform);
- p->radius = 0.0f;
- p->feather = 1.0f;
- p->innerColor = color;
- p->outerColor = color;
-}
-
-
-// State handling
-void nvgSave(NVGcontext* ctx)
-{
- if (ctx->nstates >= NVG_MAX_STATES)
- return;
- if (ctx->nstates > 0)
- memcpy(&ctx->states[ctx->nstates], &ctx->states[ctx->nstates-1], sizeof(NVGstate));
- ctx->nstates++;
-}
-
-void nvgRestore(NVGcontext* ctx)
-{
- if (ctx->nstates <= 1)
- return;
- ctx->nstates--;
-}
-
-void nvgReset(NVGcontext* ctx)
-{
- NVGstate* state = nvg__getState(ctx);
- memset(state, 0, sizeof(*state));
-
- nvg__setPaintColor(&state->fill, nvgRGBA(255,255,255,255));
- nvg__setPaintColor(&state->stroke, nvgRGBA(0,0,0,255));
- state->strokeWidth = 1.0f;
- state->miterLimit = 10.0f;
- state->lineCap = NVG_BUTT;
- state->lineJoin = NVG_MITER;
- state->alpha = 1.0f;
- nvgTransformIdentity(state->xform);
-
- state->scissor.extent[0] = -1.0f;
- state->scissor.extent[1] = -1.0f;
-
- state->fontSize = 16.0f;
- state->letterSpacing = 0.0f;
- state->lineHeight = 1.0f;
- state->fontBlur = 0.0f;
- state->textAlign = NVG_ALIGN_LEFT | NVG_ALIGN_BASELINE;
- state->fontId = 0;
-}
-
-// State setting
-void nvgStrokeWidth(NVGcontext* ctx, float width)
-{
- NVGstate* state = nvg__getState(ctx);
- state->strokeWidth = width;
-}
-
-void nvgMiterLimit(NVGcontext* ctx, float limit)
-{
- NVGstate* state = nvg__getState(ctx);
- state->miterLimit = limit;
-}
-
-void nvgLineCap(NVGcontext* ctx, int cap)
-{
- NVGstate* state = nvg__getState(ctx);
- state->lineCap = cap;
-}
-
-void nvgLineJoin(NVGcontext* ctx, int join)
-{
- NVGstate* state = nvg__getState(ctx);
- state->lineJoin = join;
-}
-
-void nvgGlobalAlpha(NVGcontext* ctx, float alpha)
-{
- NVGstate* state = nvg__getState(ctx);
- state->alpha = alpha;
-}
-
-void nvgTransform(NVGcontext* ctx, float a, float b, float c, float d, float e, float f)
-{
- NVGstate* state = nvg__getState(ctx);
- float t[6] = { a, b, c, d, e, f };
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgResetTransform(NVGcontext* ctx)
-{
- NVGstate* state = nvg__getState(ctx);
- nvgTransformIdentity(state->xform);
-}
-
-void nvgTranslate(NVGcontext* ctx, float x, float y)
-{
- NVGstate* state = nvg__getState(ctx);
- float t[6];
- nvgTransformTranslate(t, x,y);
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgRotate(NVGcontext* ctx, float angle)
-{
- NVGstate* state = nvg__getState(ctx);
- float t[6];
- nvgTransformRotate(t, angle);
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgSkewX(NVGcontext* ctx, float angle)
-{
- NVGstate* state = nvg__getState(ctx);
- float t[6];
- nvgTransformSkewX(t, angle);
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgSkewY(NVGcontext* ctx, float angle)
-{
- NVGstate* state = nvg__getState(ctx);
- float t[6];
- nvgTransformSkewY(t, angle);
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgScale(NVGcontext* ctx, float x, float y)
-{
- NVGstate* state = nvg__getState(ctx);
- float t[6];
- nvgTransformScale(t, x,y);
- nvgTransformPremultiply(state->xform, t);
-}
-
-void nvgCurrentTransform(NVGcontext* ctx, float* xform)
-{
- NVGstate* state = nvg__getState(ctx);
- if (xform == NULL) return;
- memcpy(xform, state->xform, sizeof(float)*6);
-}
-
-void nvgStrokeColor(NVGcontext* ctx, NVGcolor color)
-{
- NVGstate* state = nvg__getState(ctx);
- nvg__setPaintColor(&state->stroke, color);
-}
-
-void nvgStrokePaint(NVGcontext* ctx, NVGpaint paint)
-{
- NVGstate* state = nvg__getState(ctx);
- state->stroke = paint;
- nvgTransformMultiply(state->stroke.xform, state->xform);
-}
-
-void nvgFillColor(NVGcontext* ctx, NVGcolor color)
-{
- NVGstate* state = nvg__getState(ctx);
- nvg__setPaintColor(&state->fill, color);
-}
-
-void nvgFillPaint(NVGcontext* ctx, NVGpaint paint)
-{
- NVGstate* state = nvg__getState(ctx);
- state->fill = paint;
- nvgTransformMultiply(state->fill.xform, state->xform);
-}
-
-int nvgCreateImage(NVGcontext* ctx, const char* filename, int imageFlags)
-{
- int w, h, n, image;
- unsigned char* img;
- stbi_set_unpremultiply_on_load(1);
- stbi_convert_iphone_png_to_rgb(1);
- img = stbi_load(filename, &w, &h, &n, 4);
- if (img == NULL) {
-// printf("Failed to load %s - %s\n", filename, stbi_failure_reason());
- return 0;
- }
- image = nvgCreateImageRGBA(ctx, w, h, imageFlags, img);
- stbi_image_free(img);
- return image;
-}
-
-int nvgCreateImageMem(NVGcontext* ctx, int imageFlags, unsigned char* data, int ndata)
-{
- int w, h, n, image;
- unsigned char* img = stbi_load_from_memory(data, ndata, &w, &h, &n, 4);
- if (img == NULL) {
-// printf("Failed to load %s - %s\n", filename, stbi_failure_reason());
- return 0;
- }
- image = nvgCreateImageRGBA(ctx, w, h, imageFlags, img);
- stbi_image_free(img);
- return image;
-}
-
-int nvgCreateImageRGBA(NVGcontext* ctx, int w, int h, int imageFlags, const unsigned char* data)
-{
- return ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_RGBA, w, h, imageFlags, data);
-}
-
-void nvgUpdateImage(NVGcontext* ctx, int image, const unsigned char* data)
-{
- int w, h;
- ctx->params.renderGetTextureSize(ctx->params.userPtr, image, &w, &h);
- ctx->params.renderUpdateTexture(ctx->params.userPtr, image, 0,0, w,h, data);
-}
-
-void nvgImageSize(NVGcontext* ctx, int image, int* w, int* h)
-{
- ctx->params.renderGetTextureSize(ctx->params.userPtr, image, w, h);
-}
-
-void nvgDeleteImage(NVGcontext* ctx, int image)
-{
- ctx->params.renderDeleteTexture(ctx->params.userPtr, image);
-}
-
-NVGpaint nvgLinearGradient(NVGcontext* ctx,
- float sx, float sy, float ex, float ey,
- NVGcolor icol, NVGcolor ocol)
-{
- NVGpaint p;
- float dx, dy, d;
- const float large = 1e5;
- NVG_NOTUSED(ctx);
- memset(&p, 0, sizeof(p));
-
- // Calculate transform aligned to the line
- dx = ex - sx;
- dy = ey - sy;
- d = sqrtf(dx*dx + dy*dy);
- if (d > 0.0001f) {
- dx /= d;
- dy /= d;
- } else {
- dx = 0;
- dy = 1;
- }
-
- p.xform[0] = dy; p.xform[1] = -dx;
- p.xform[2] = dx; p.xform[3] = dy;
- p.xform[4] = sx - dx*large; p.xform[5] = sy - dy*large;
-
- p.extent[0] = large;
- p.extent[1] = large + d*0.5f;
-
- p.radius = 0.0f;
-
- p.feather = nvg__maxf(1.0f, d);
-
- p.innerColor = icol;
- p.outerColor = ocol;
-
- return p;
-}
-
-NVGpaint nvgRadialGradient(NVGcontext* ctx,
- float cx, float cy, float inr, float outr,
- NVGcolor icol, NVGcolor ocol)
-{
- NVGpaint p;
- float r = (inr+outr)*0.5f;
- float f = (outr-inr);
- NVG_NOTUSED(ctx);
- memset(&p, 0, sizeof(p));
-
- nvgTransformIdentity(p.xform);
- p.xform[4] = cx;
- p.xform[5] = cy;
-
- p.extent[0] = r;
- p.extent[1] = r;
-
- p.radius = r;
-
- p.feather = nvg__maxf(1.0f, f);
-
- p.innerColor = icol;
- p.outerColor = ocol;
-
- return p;
-}
-
-NVGpaint nvgBoxGradient(NVGcontext* ctx,
- float x, float y, float w, float h, float r, float f,
- NVGcolor icol, NVGcolor ocol)
-{
- NVGpaint p;
- NVG_NOTUSED(ctx);
- memset(&p, 0, sizeof(p));
-
- nvgTransformIdentity(p.xform);
- p.xform[4] = x+w*0.5f;
- p.xform[5] = y+h*0.5f;
-
- p.extent[0] = w*0.5f;
- p.extent[1] = h*0.5f;
-
- p.radius = r;
-
- p.feather = nvg__maxf(1.0f, f);
-
- p.innerColor = icol;
- p.outerColor = ocol;
-
- return p;
-}
-
-
-NVGpaint nvgImagePattern(NVGcontext* ctx,
- float cx, float cy, float w, float h, float angle,
- int image, float alpha)
-{
- NVGpaint p;
- NVG_NOTUSED(ctx);
- memset(&p, 0, sizeof(p));
-
- nvgTransformRotate(p.xform, angle);
- p.xform[4] = cx;
- p.xform[5] = cy;
-
- p.extent[0] = w;
- p.extent[1] = h;
-
- p.image = image;
-
- p.innerColor = p.outerColor = nvgRGBAf(1,1,1,alpha);
-
- return p;
-}
-
-// Scissoring
-void nvgScissor(NVGcontext* ctx, float x, float y, float w, float h)
-{
- NVGstate* state = nvg__getState(ctx);
-
- w = nvg__maxf(0.0f, w);
- h = nvg__maxf(0.0f, h);
-
- nvgTransformIdentity(state->scissor.xform);
- state->scissor.xform[4] = x+w*0.5f;
- state->scissor.xform[5] = y+h*0.5f;
- nvgTransformMultiply(state->scissor.xform, state->xform);
-
- state->scissor.extent[0] = w*0.5f;
- state->scissor.extent[1] = h*0.5f;
-}
-
-static void nvg__isectRects(float* dst,
- float ax, float ay, float aw, float ah,
- float bx, float by, float bw, float bh)
-{
- float minx = nvg__maxf(ax, bx);
- float miny = nvg__maxf(ay, by);
- float maxx = nvg__minf(ax+aw, bx+bw);
- float maxy = nvg__minf(ay+ah, by+bh);
- dst[0] = minx;
- dst[1] = miny;
- dst[2] = nvg__maxf(0.0f, maxx - minx);
- dst[3] = nvg__maxf(0.0f, maxy - miny);
-}
-
-void nvgIntersectScissor(NVGcontext* ctx, float x, float y, float w, float h)
-{
- NVGstate* state = nvg__getState(ctx);
- float pxform[6], invxorm[6];
- float rect[4];
- float ex, ey, tex, tey;
-
- // If no previous scissor has been set, set the scissor as current scissor.
- if (state->scissor.extent[0] < 0) {
- nvgScissor(ctx, x, y, w, h);
- return;
- }
-
- // Transform the current scissor rect into current transform space.
- // If there is difference in rotation, this will be approximation.
- memcpy(pxform, state->scissor.xform, sizeof(float)*6);
- ex = state->scissor.extent[0];
- ey = state->scissor.extent[1];
- nvgTransformInverse(invxorm, state->xform);
- nvgTransformMultiply(pxform, invxorm);
- tex = ex*nvg__absf(pxform[0]) + ey*nvg__absf(pxform[2]);
- tey = ex*nvg__absf(pxform[1]) + ey*nvg__absf(pxform[3]);
-
- // Intersect rects.
- nvg__isectRects(rect, pxform[4]-tex,pxform[5]-tey,tex*2,tey*2, x,y,w,h);
-
- nvgScissor(ctx, rect[0], rect[1], rect[2], rect[3]);
-}
-
-void nvgResetScissor(NVGcontext* ctx)
-{
- NVGstate* state = nvg__getState(ctx);
- memset(state->scissor.xform, 0, sizeof(state->scissor.xform));
- state->scissor.extent[0] = -1.0f;
- state->scissor.extent[1] = -1.0f;
-}
-
-static int nvg__ptEquals(float x1, float y1, float x2, float y2, float tol)
-{
- float dx = x2 - x1;
- float dy = y2 - y1;
- return dx*dx + dy*dy < tol*tol;
-}
-
-static float nvg__distPtSeg(float x, float y, float px, float py, float qx, float qy)
-{
- float pqx, pqy, dx, dy, d, t;
- pqx = qx-px;
- pqy = qy-py;
- dx = x-px;
- dy = y-py;
- d = pqx*pqx + pqy*pqy;
- t = pqx*dx + pqy*dy;
- if (d > 0) t /= d;
- if (t < 0) t = 0;
- else if (t > 1) t = 1;
- dx = px + t*pqx - x;
- dy = py + t*pqy - y;
- return dx*dx + dy*dy;
-}
-
-static void nvg__appendCommands(NVGcontext* ctx, float* vals, int nvals)
-{
- NVGstate* state = nvg__getState(ctx);
- int i;
-
- if (ctx->ncommands+nvals > ctx->ccommands) {
- float* commands;
- int ccommands = ctx->ncommands+nvals + ctx->ccommands/2;
- commands = (float*)realloc(ctx->commands, sizeof(float)*ccommands);
- if (commands == NULL) return;
- ctx->commands = commands;
- ctx->ccommands = ccommands;
- }
-
- if ((int)vals[0] != NVG_CLOSE && (int)vals[0] != NVG_WINDING) {
- ctx->commandx = vals[nvals-2];
- ctx->commandy = vals[nvals-1];
- }
-
- // transform commands
- i = 0;
- while (i < nvals) {
- int cmd = (int)vals[i];
- switch (cmd) {
- case NVG_MOVETO:
- nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]);
- i += 3;
- break;
- case NVG_LINETO:
- nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]);
- i += 3;
- break;
- case NVG_BEZIERTO:
- nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]);
- nvgTransformPoint(&vals[i+3],&vals[i+4], state->xform, vals[i+3],vals[i+4]);
- nvgTransformPoint(&vals[i+5],&vals[i+6], state->xform, vals[i+5],vals[i+6]);
- i += 7;
- break;
- case NVG_CLOSE:
- i++;
- break;
- case NVG_WINDING:
- i += 2;
- break;
- default:
- i++;
- }
- }
-
- memcpy(&ctx->commands[ctx->ncommands], vals, nvals*sizeof(float));
-
- ctx->ncommands += nvals;
-}
-
-
-static void nvg__clearPathCache(NVGcontext* ctx)
-{
- ctx->cache->npoints = 0;
- ctx->cache->npaths = 0;
-}
-
-static NVGpath* nvg__lastPath(NVGcontext* ctx)
-{
- if (ctx->cache->npaths > 0)
- return &ctx->cache->paths[ctx->cache->npaths-1];
- return NULL;
-}
-
-static void nvg__addPath(NVGcontext* ctx)
-{
- NVGpath* path;
- if (ctx->cache->npaths+1 > ctx->cache->cpaths) {
- NVGpath* paths;
- int cpaths = ctx->cache->npaths+1 + ctx->cache->cpaths/2;
- paths = (NVGpath*)realloc(ctx->cache->paths, sizeof(NVGpath)*cpaths);
- if (paths == NULL) return;
- ctx->cache->paths = paths;
- ctx->cache->cpaths = cpaths;
- }
- path = &ctx->cache->paths[ctx->cache->npaths];
- memset(path, 0, sizeof(*path));
- path->first = ctx->cache->npoints;
- path->winding = NVG_CCW;
-
- ctx->cache->npaths++;
-}
-
-static NVGpoint* nvg__lastPoint(NVGcontext* ctx)
-{
- if (ctx->cache->npoints > 0)
- return &ctx->cache->points[ctx->cache->npoints-1];
- return NULL;
-}
-
-static void nvg__addPoint(NVGcontext* ctx, float x, float y, int flags)
-{
- NVGpath* path = nvg__lastPath(ctx);
- NVGpoint* pt;
- if (path == NULL) return;
-
- if (path->count > 0 && ctx->cache->npoints > 0) {
- pt = nvg__lastPoint(ctx);
- if (nvg__ptEquals(pt->x,pt->y, x,y, ctx->distTol)) {
- pt->flags |= flags;
- return;
- }
- }
-
- if (ctx->cache->npoints+1 > ctx->cache->cpoints) {
- NVGpoint* points;
- int cpoints = ctx->cache->npoints+1 + ctx->cache->cpoints/2;
- points = (NVGpoint*)realloc(ctx->cache->points, sizeof(NVGpoint)*cpoints);
- if (points == NULL) return;
- ctx->cache->points = points;
- ctx->cache->cpoints = cpoints;
- }
-
- pt = &ctx->cache->points[ctx->cache->npoints];
- memset(pt, 0, sizeof(*pt));
- pt->x = x;
- pt->y = y;
- pt->flags = (unsigned char)flags;
-
- ctx->cache->npoints++;
- path->count++;
-}
-
-static void nvg__closePath(NVGcontext* ctx)
-{
- NVGpath* path = nvg__lastPath(ctx);
- if (path == NULL) return;
- path->closed = 1;
-}
-
-static void nvg__pathWinding(NVGcontext* ctx, int winding)
-{
- NVGpath* path = nvg__lastPath(ctx);
- if (path == NULL) return;
- path->winding = winding;
-}
-
-static float nvg__getAverageScale(float *t)
-{
- float sx = sqrtf(t[0]*t[0] + t[2]*t[2]);
- float sy = sqrtf(t[1]*t[1] + t[3]*t[3]);
- return (sx + sy) * 0.5f;
-}
-
-static NVGvertex* nvg__allocTempVerts(NVGcontext* ctx, int nverts)
-{
- if (nverts > ctx->cache->cverts) {
- NVGvertex* verts;
- int cverts = (nverts + 0xff) & ~0xff; // Round up to prevent allocations when things change just slightly.
- verts = (NVGvertex*)realloc(ctx->cache->verts, sizeof(NVGvertex)*cverts);
- if (verts == NULL) return NULL;
- ctx->cache->verts = verts;
- ctx->cache->cverts = cverts;
- }
-
- return ctx->cache->verts;
-}
-
-static float nvg__triarea2(float ax, float ay, float bx, float by, float cx, float cy)
-{
- float abx = bx - ax;
- float aby = by - ay;
- float acx = cx - ax;
- float acy = cy - ay;
- return acx*aby - abx*acy;
-}
-
-static float nvg__polyArea(NVGpoint* pts, int npts)
-{
- int i;
- float area = 0;
- for (i = 2; i < npts; i++) {
- NVGpoint* a = &pts[0];
- NVGpoint* b = &pts[i-1];
- NVGpoint* c = &pts[i];
- area += nvg__triarea2(a->x,a->y, b->x,b->y, c->x,c->y);
- }
- return area * 0.5f;
-}
-
-static void nvg__polyReverse(NVGpoint* pts, int npts)
-{
- NVGpoint tmp;
- int i = 0, j = npts-1;
- while (i < j) {
- tmp = pts[i];
- pts[i] = pts[j];
- pts[j] = tmp;
- i++;
- j--;
- }
-}
-
-
-static void nvg__vset(NVGvertex* vtx, float x, float y, float u, float v)
-{
- vtx->x = x;
- vtx->y = y;
- vtx->u = u;
- vtx->v = v;
-}
-
-static void nvg__tesselateBezier(NVGcontext* ctx,
- float x1, float y1, float x2, float y2,
- float x3, float y3, float x4, float y4,
- int level, int type)
-{
- float x12,y12,x23,y23,x34,y34,x123,y123,x234,y234,x1234,y1234;
- float dx,dy,d2,d3;
-
- if (level > 10) return;
-
- x12 = (x1+x2)*0.5f;
- y12 = (y1+y2)*0.5f;
- x23 = (x2+x3)*0.5f;
- y23 = (y2+y3)*0.5f;
- x34 = (x3+x4)*0.5f;
- y34 = (y3+y4)*0.5f;
- x123 = (x12+x23)*0.5f;
- y123 = (y12+y23)*0.5f;
-
- dx = x4 - x1;
- dy = y4 - y1;
- d2 = nvg__absf(((x2 - x4) * dy - (y2 - y4) * dx));
- d3 = nvg__absf(((x3 - x4) * dy - (y3 - y4) * dx));
-
- if ((d2 + d3)*(d2 + d3) < ctx->tessTol * (dx*dx + dy*dy)) {
- nvg__addPoint(ctx, x4, y4, type);
- return;
- }
-
-/* if (nvg__absf(x1+x3-x2-x2) + nvg__absf(y1+y3-y2-y2) + nvg__absf(x2+x4-x3-x3) + nvg__absf(y2+y4-y3-y3) < ctx->tessTol) {
- nvg__addPoint(ctx, x4, y4, type);
- return;
- }*/
-
- x234 = (x23+x34)*0.5f;
- y234 = (y23+y34)*0.5f;
- x1234 = (x123+x234)*0.5f;
- y1234 = (y123+y234)*0.5f;
-
- nvg__tesselateBezier(ctx, x1,y1, x12,y12, x123,y123, x1234,y1234, level+1, 0);
- nvg__tesselateBezier(ctx, x1234,y1234, x234,y234, x34,y34, x4,y4, level+1, type);
-}
-
-static void nvg__flattenPaths(NVGcontext* ctx)
-{
- NVGpathCache* cache = ctx->cache;
-// NVGstate* state = nvg__getState(ctx);
- NVGpoint* last;
- NVGpoint* p0;
- NVGpoint* p1;
- NVGpoint* pts;
- NVGpath* path;
- int i, j;
- float* cp1;
- float* cp2;
- float* p;
- float area;
-
- if (cache->npaths > 0)
- return;
-
- // Flatten
- i = 0;
- while (i < ctx->ncommands) {
- int cmd = (int)ctx->commands[i];
- switch (cmd) {
- case NVG_MOVETO:
- nvg__addPath(ctx);
- p = &ctx->commands[i+1];
- nvg__addPoint(ctx, p[0], p[1], NVG_PT_CORNER);
- i += 3;
- break;
- case NVG_LINETO:
- p = &ctx->commands[i+1];
- nvg__addPoint(ctx, p[0], p[1], NVG_PT_CORNER);
- i += 3;
- break;
- case NVG_BEZIERTO:
- last = nvg__lastPoint(ctx);
- if (last != NULL) {
- cp1 = &ctx->commands[i+1];
- cp2 = &ctx->commands[i+3];
- p = &ctx->commands[i+5];
- nvg__tesselateBezier(ctx, last->x,last->y, cp1[0],cp1[1], cp2[0],cp2[1], p[0],p[1], 0, NVG_PT_CORNER);
- }
- i += 7;
- break;
- case NVG_CLOSE:
- nvg__closePath(ctx);
- i++;
- break;
- case NVG_WINDING:
- nvg__pathWinding(ctx, (int)ctx->commands[i+1]);
- i += 2;
- break;
- default:
- i++;
- }
- }
-
- cache->bounds[0] = cache->bounds[1] = 1e6f;
- cache->bounds[2] = cache->bounds[3] = -1e6f;
-
- // Calculate the direction and length of line segments.
- for (j = 0; j < cache->npaths; j++) {
- path = &cache->paths[j];
- pts = &cache->points[path->first];
-
- // If the first and last points are the same, remove the last, mark as closed path.
- p0 = &pts[path->count-1];
- p1 = &pts[0];
- if (nvg__ptEquals(p0->x,p0->y, p1->x,p1->y, ctx->distTol)) {
- path->count--;
- p0 = &pts[path->count-1];
- path->closed = 1;
- }
-
- // Enforce winding.
- if (path->count > 2) {
- area = nvg__polyArea(pts, path->count);
- if (path->winding == NVG_CCW && area < 0.0f)
- nvg__polyReverse(pts, path->count);
- if (path->winding == NVG_CW && area > 0.0f)
- nvg__polyReverse(pts, path->count);
- }
-
- for(i = 0; i < path->count; i++) {
- // Calculate segment direction and length
- p0->dx = p1->x - p0->x;
- p0->dy = p1->y - p0->y;
- p0->len = nvg__normalize(&p0->dx, &p0->dy);
- // Update bounds
- cache->bounds[0] = nvg__minf(cache->bounds[0], p0->x);
- cache->bounds[1] = nvg__minf(cache->bounds[1], p0->y);
- cache->bounds[2] = nvg__maxf(cache->bounds[2], p0->x);
- cache->bounds[3] = nvg__maxf(cache->bounds[3], p0->y);
- // Advance
- p0 = p1++;
- }
- }
-}
-
-static int nvg__curveDivs(float r, float arc, float tol)
-{
- float da = acosf(r / (r + tol)) * 2.0f;
- return nvg__maxi(2, (int)ceilf(arc / da));
-}
-
-static void nvg__chooseBevel(int bevel, NVGpoint* p0, NVGpoint* p1, float w,
- float* x0, float* y0, float* x1, float* y1)
-{
- if (bevel) {
- *x0 = p1->x + p0->dy * w;
- *y0 = p1->y - p0->dx * w;
- *x1 = p1->x + p1->dy * w;
- *y1 = p1->y - p1->dx * w;
- } else {
- *x0 = p1->x + p1->dmx * w;
- *y0 = p1->y + p1->dmy * w;
- *x1 = p1->x + p1->dmx * w;
- *y1 = p1->y + p1->dmy * w;
- }
-}
-
-static NVGvertex* nvg__roundJoin(NVGvertex* dst, NVGpoint* p0, NVGpoint* p1,
- float lw, float rw, float lu, float ru, int ncap, float fringe)
-{
- int i, n;
- float dlx0 = p0->dy;
- float dly0 = -p0->dx;
- float dlx1 = p1->dy;
- float dly1 = -p1->dx;
- NVG_NOTUSED(fringe);
-
- if (p1->flags & NVG_PT_LEFT) {
- float lx0,ly0,lx1,ly1,a0,a1;
- nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, lw, &lx0,&ly0, &lx1,&ly1);
- a0 = atan2f(-dly0, -dlx0);
- a1 = atan2f(-dly1, -dlx1);
- if (a1 > a0) a1 -= NVG_PI*2;
-
- nvg__vset(dst, lx0, ly0, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
-
- n = nvg__clampi((int)ceilf(((a0 - a1) / NVG_PI) * ncap), 2, ncap);
- for (i = 0; i < n; i++) {
- float u = i/(float)(n-1);
- float a = a0 + u*(a1-a0);
- float rx = p1->x + cosf(a) * rw;
- float ry = p1->y + sinf(a) * rw;
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
- nvg__vset(dst, rx, ry, ru,1); dst++;
- }
-
- nvg__vset(dst, lx1, ly1, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
-
- } else {
- float rx0,ry0,rx1,ry1,a0,a1;
- nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, -rw, &rx0,&ry0, &rx1,&ry1);
- a0 = atan2f(dly0, dlx0);
- a1 = atan2f(dly1, dlx1);
- if (a1 < a0) a1 += NVG_PI*2;
-
- nvg__vset(dst, p1->x + dlx0*rw, p1->y + dly0*rw, lu,1); dst++;
- nvg__vset(dst, rx0, ry0, ru,1); dst++;
-
- n = nvg__clampi((int)ceilf(((a1 - a0) / NVG_PI) * ncap), 2, ncap);
- for (i = 0; i < n; i++) {
- float u = i/(float)(n-1);
- float a = a0 + u*(a1-a0);
- float lx = p1->x + cosf(a) * lw;
- float ly = p1->y + sinf(a) * lw;
- nvg__vset(dst, lx, ly, lu,1); dst++;
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
- }
-
- nvg__vset(dst, p1->x + dlx1*rw, p1->y + dly1*rw, lu,1); dst++;
- nvg__vset(dst, rx1, ry1, ru,1); dst++;
-
- }
- return dst;
-}
-
-static NVGvertex* nvg__bevelJoin(NVGvertex* dst, NVGpoint* p0, NVGpoint* p1,
- float lw, float rw, float lu, float ru, float fringe)
-{
- float rx0,ry0,rx1,ry1;
- float lx0,ly0,lx1,ly1;
- float dlx0 = p0->dy;
- float dly0 = -p0->dx;
- float dlx1 = p1->dy;
- float dly1 = -p1->dx;
- NVG_NOTUSED(fringe);
-
- if (p1->flags & NVG_PT_LEFT) {
- nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, lw, &lx0,&ly0, &lx1,&ly1);
-
- nvg__vset(dst, lx0, ly0, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
-
- if (p1->flags & NVG_PT_BEVEL) {
- nvg__vset(dst, lx0, ly0, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
-
- nvg__vset(dst, lx1, ly1, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
- } else {
- rx0 = p1->x - p1->dmx * rw;
- ry0 = p1->y - p1->dmy * rw;
-
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
- nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
-
- nvg__vset(dst, rx0, ry0, ru,1); dst++;
- nvg__vset(dst, rx0, ry0, ru,1); dst++;
-
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
- nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
- }
-
- nvg__vset(dst, lx1, ly1, lu,1); dst++;
- nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
-
- } else {
- nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, -rw, &rx0,&ry0, &rx1,&ry1);
-
- nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++;
- nvg__vset(dst, rx0, ry0, ru,1); dst++;
-
- if (p1->flags & NVG_PT_BEVEL) {
- nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++;
- nvg__vset(dst, rx0, ry0, ru,1); dst++;
-
- nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++;
- nvg__vset(dst, rx1, ry1, ru,1); dst++;
- } else {
- lx0 = p1->x + p1->dmx * lw;
- ly0 = p1->y + p1->dmy * lw;
-
- nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++;
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
-
- nvg__vset(dst, lx0, ly0, lu,1); dst++;
- nvg__vset(dst, lx0, ly0, lu,1); dst++;
-
- nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++;
- nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
- }
-
- nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++;
- nvg__vset(dst, rx1, ry1, ru,1); dst++;
- }
-
- return dst;
-}
-
-static NVGvertex* nvg__buttCapStart(NVGvertex* dst, NVGpoint* p,
- float dx, float dy, float w, float d, float aa)
-{
- float px = p->x - dx*d;
- float py = p->y - dy*d;
- float dlx = dy;
- float dly = -dx;
- nvg__vset(dst, px + dlx*w - dx*aa, py + dly*w - dy*aa, 0,0); dst++;
- nvg__vset(dst, px - dlx*w - dx*aa, py - dly*w - dy*aa, 1,0); dst++;
- nvg__vset(dst, px + dlx*w, py + dly*w, 0,1); dst++;
- nvg__vset(dst, px - dlx*w, py - dly*w, 1,1); dst++;
- return dst;
-}
-
-static NVGvertex* nvg__buttCapEnd(NVGvertex* dst, NVGpoint* p,
- float dx, float dy, float w, float d, float aa)
-{
- float px = p->x + dx*d;
- float py = p->y + dy*d;
- float dlx = dy;
- float dly = -dx;
- nvg__vset(dst, px + dlx*w, py + dly*w, 0,1); dst++;
- nvg__vset(dst, px - dlx*w, py - dly*w, 1,1); dst++;
- nvg__vset(dst, px + dlx*w + dx*aa, py + dly*w + dy*aa, 0,0); dst++;
- nvg__vset(dst, px - dlx*w + dx*aa, py - dly*w + dy*aa, 1,0); dst++;
- return dst;
-}
-
-
-static NVGvertex* nvg__roundCapStart(NVGvertex* dst, NVGpoint* p,
- float dx, float dy, float w, int ncap, float aa)
-{
- int i;
- float px = p->x;
- float py = p->y;
- float dlx = dy;
- float dly = -dx;
- NVG_NOTUSED(aa);
- for (i = 0; i < ncap; i++) {
- float a = i/(float)(ncap-1)*NVG_PI;
- float ax = cosf(a) * w, ay = sinf(a) * w;
- nvg__vset(dst, px - dlx*ax - dx*ay, py - dly*ax - dy*ay, 0,1); dst++;
- nvg__vset(dst, px, py, 0.5f,1); dst++;
- }
- nvg__vset(dst, px + dlx*w, py + dly*w, 0,1); dst++;
- nvg__vset(dst, px - dlx*w, py - dly*w, 1,1); dst++;
- return dst;
-}
-
-static NVGvertex* nvg__roundCapEnd(NVGvertex* dst, NVGpoint* p,
- float dx, float dy, float w, int ncap, float aa)
-{
- int i;
- float px = p->x;
- float py = p->y;
- float dlx = dy;
- float dly = -dx;
- NVG_NOTUSED(aa);
- nvg__vset(dst, px + dlx*w, py + dly*w, 0,1); dst++;
- nvg__vset(dst, px - dlx*w, py - dly*w, 1,1); dst++;
- for (i = 0; i < ncap; i++) {
- float a = i/(float)(ncap-1)*NVG_PI;
- float ax = cosf(a) * w, ay = sinf(a) * w;
- nvg__vset(dst, px, py, 0.5f,1); dst++;
- nvg__vset(dst, px - dlx*ax + dx*ay, py - dly*ax + dy*ay, 0,1); dst++;
- }
- return dst;
-}
-
-
-static void nvg__calculateJoins(NVGcontext* ctx, float w, int lineJoin, float miterLimit)
-{
- NVGpathCache* cache = ctx->cache;
- int i, j;
- float iw = 0.0f;
-
- if (w > 0.0f) iw = 1.0f / w;
-
- // Calculate which joins needs extra vertices to append, and gather vertex count.
- for (i = 0; i < cache->npaths; i++) {
- NVGpath* path = &cache->paths[i];
- NVGpoint* pts = &cache->points[path->first];
- NVGpoint* p0 = &pts[path->count-1];
- NVGpoint* p1 = &pts[0];
- int nleft = 0;
-
- path->nbevel = 0;
-
- for (j = 0; j < path->count; j++) {
- float dlx0, dly0, dlx1, dly1, dmr2, cross, limit;
- dlx0 = p0->dy;
- dly0 = -p0->dx;
- dlx1 = p1->dy;
- dly1 = -p1->dx;
- // Calculate extrusions
- p1->dmx = (dlx0 + dlx1) * 0.5f;
- p1->dmy = (dly0 + dly1) * 0.5f;
- dmr2 = p1->dmx*p1->dmx + p1->dmy*p1->dmy;
- if (dmr2 > 0.000001f) {
- float scale = 1.0f / dmr2;
- if (scale > 600.0f) {
- scale = 600.0f;
- }
- p1->dmx *= scale;
- p1->dmy *= scale;
- }
-
- // Clear flags, but keep the corner.
- p1->flags = (p1->flags & NVG_PT_CORNER) ? NVG_PT_CORNER : 0;
-
- // Keep track of left turns.
- cross = p1->dx * p0->dy - p0->dx * p1->dy;
- if (cross > 0.0f) {
- nleft++;
- p1->flags |= NVG_PT_LEFT;
- }
-
- // Calculate if we should use bevel or miter for inner join.
- limit = nvg__maxf(1.01f, nvg__minf(p0->len, p1->len) * iw);
- if ((dmr2 * limit*limit) < 1.0f)
- p1->flags |= NVG_PR_INNERBEVEL;
-
- // Check to see if the corner needs to be beveled.
- if (p1->flags & NVG_PT_CORNER) {
- if ((dmr2 * miterLimit*miterLimit) < 1.0f || lineJoin == NVG_BEVEL || lineJoin == NVG_ROUND) {
- p1->flags |= NVG_PT_BEVEL;
- }
- }
-
- if ((p1->flags & (NVG_PT_BEVEL | NVG_PR_INNERBEVEL)) != 0)
- path->nbevel++;
-
- p0 = p1++;
- }
-
- path->convex = (nleft == path->count) ? 1 : 0;
- }
-}
-
-
-static int nvg__expandStroke(NVGcontext* ctx, float w, int lineCap, int lineJoin, float miterLimit)
-{
- NVGpathCache* cache = ctx->cache;
- NVGvertex* verts;
- NVGvertex* dst;
- int cverts, i, j;
- float aa = ctx->fringeWidth;
- int ncap = nvg__curveDivs(w, NVG_PI, ctx->tessTol); // Calculate divisions per half circle.
-
- nvg__calculateJoins(ctx, w, lineJoin, miterLimit);
-
- // Calculate max vertex usage.
- cverts = 0;
- for (i = 0; i < cache->npaths; i++) {
- NVGpath* path = &cache->paths[i];
- int loop = (path->closed == 0) ? 0 : 1;
- if (lineJoin == NVG_ROUND)
- cverts += (path->count + path->nbevel*(ncap+2) + 1) * 2; // plus one for loop
- else
- cverts += (path->count + path->nbevel*5 + 1) * 2; // plus one for loop
- if (loop == 0) {
- // space for caps
- if (lineCap == NVG_ROUND) {
- cverts += (ncap*2 + 2)*2;
- } else {
- cverts += (3+3)*2;
- }
- }
- }
-
- verts = nvg__allocTempVerts(ctx, cverts);
- if (verts == NULL) return 0;
-
- for (i = 0; i < cache->npaths; i++) {
- NVGpath* path = &cache->paths[i];
- NVGpoint* pts = &cache->points[path->first];
- NVGpoint* p0;
- NVGpoint* p1;
- int s, e, loop;
- float dx, dy;
-
- path->fill = 0;
- path->nfill = 0;
-
- // Calculate fringe or stroke
- loop = (path->closed == 0) ? 0 : 1;
- dst = verts;
- path->stroke = dst;
-
- if (loop) {
- // Looping
- p0 = &pts[path->count-1];
- p1 = &pts[0];
- s = 0;
- e = path->count;
- } else {
- // Add cap
- p0 = &pts[0];
- p1 = &pts[1];
- s = 1;
- e = path->count-1;
- }
-
- if (loop == 0) {
- // Add cap
- dx = p1->x - p0->x;
- dy = p1->y - p0->y;
- nvg__normalize(&dx, &dy);
- if (lineCap == NVG_BUTT)
- dst = nvg__buttCapStart(dst, p0, dx, dy, w, -aa*0.5f, aa);
- else if (lineCap == NVG_BUTT || lineCap == NVG_SQUARE)
- dst = nvg__buttCapStart(dst, p0, dx, dy, w, w-aa, aa);
- else if (lineCap == NVG_ROUND)
- dst = nvg__roundCapStart(dst, p0, dx, dy, w, ncap, aa);
- }
-
- for (j = s; j < e; ++j) {
- if ((p1->flags & (NVG_PT_BEVEL | NVG_PR_INNERBEVEL)) != 0) {
- if (lineJoin == NVG_ROUND) {
- dst = nvg__roundJoin(dst, p0, p1, w, w, 0, 1, ncap, aa);
- } else {
- dst = nvg__bevelJoin(dst, p0, p1, w, w, 0, 1, aa);
- }
- } else {
- nvg__vset(dst, p1->x + (p1->dmx * w), p1->y + (p1->dmy * w), 0,1); dst++;
- nvg__vset(dst, p1->x - (p1->dmx * w), p1->y - (p1->dmy * w), 1,1); dst++;
- }
- p0 = p1++;
- }
-
- if (loop) {
- // Loop it
- nvg__vset(dst, verts[0].x, verts[0].y, 0,1); dst++;
- nvg__vset(dst, verts[1].x, verts[1].y, 1,1); dst++;
- } else {
- // Add cap
- dx = p1->x - p0->x;
- dy = p1->y - p0->y;
- nvg__normalize(&dx, &dy);
- if (lineCap == NVG_BUTT)
- dst = nvg__buttCapEnd(dst, p1, dx, dy, w, -aa*0.5f, aa);
- else if (lineCap == NVG_BUTT || lineCap == NVG_SQUARE)
- dst = nvg__buttCapEnd(dst, p1, dx, dy, w, w-aa, aa);
- else if (lineCap == NVG_ROUND)
- dst = nvg__roundCapEnd(dst, p1, dx, dy, w, ncap, aa);
- }
-
- path->nstroke = (int)(dst - verts);
-
- verts = dst;
- }
-
- return 1;
-}
-
-static int nvg__expandFill(NVGcontext* ctx, float w, int lineJoin, float miterLimit)
-{
- NVGpathCache* cache = ctx->cache;
- NVGvertex* verts;
- NVGvertex* dst;
- int cverts, convex, i, j;
- float aa = ctx->fringeWidth;
- int fringe = w > 0.0f;
-
- nvg__calculateJoins(ctx, w, lineJoin, miterLimit);
-
- // Calculate max vertex usage.
- cverts = 0;
- for (i = 0; i < cache->npaths; i++) {
- NVGpath* path = &cache->paths[i];
- cverts += path->count + path->nbevel + 1;
- if (fringe)
- cverts += (path->count + path->nbevel*5 + 1) * 2; // plus one for loop
- }
-
- verts = nvg__allocTempVerts(ctx, cverts);
- if (verts == NULL) return 0;
-
- convex = cache->npaths == 1 && cache->paths[0].convex;
-
- for (i = 0; i < cache->npaths; i++) {
- NVGpath* path = &cache->paths[i];
- NVGpoint* pts = &cache->points[path->first];
- NVGpoint* p0;
- NVGpoint* p1;
- float rw, lw, woff;
- float ru, lu;
-
- // Calculate shape vertices.
- woff = 0.5f*aa;
- dst = verts;
- path->fill = dst;
-
- if (fringe) {
- // Looping
- p0 = &pts[path->count-1];
- p1 = &pts[0];
- for (j = 0; j < path->count; ++j) {
- if (p1->flags & NVG_PT_BEVEL) {
- float dlx0 = p0->dy;
- float dly0 = -p0->dx;
- float dlx1 = p1->dy;
- float dly1 = -p1->dx;
- if (p1->flags & NVG_PT_LEFT) {
- float lx = p1->x + p1->dmx * woff;
- float ly = p1->y + p1->dmy * woff;
- nvg__vset(dst, lx, ly, 0.5f,1); dst++;
- } else {
- float lx0 = p1->x + dlx0 * woff;
- float ly0 = p1->y + dly0 * woff;
- float lx1 = p1->x + dlx1 * woff;
- float ly1 = p1->y + dly1 * woff;
- nvg__vset(dst, lx0, ly0, 0.5f,1); dst++;
- nvg__vset(dst, lx1, ly1, 0.5f,1); dst++;
- }
- } else {
- nvg__vset(dst, p1->x + (p1->dmx * woff), p1->y + (p1->dmy * woff), 0.5f,1); dst++;
- }
- p0 = p1++;
- }
- } else {
- for (j = 0; j < path->count; ++j) {
- nvg__vset(dst, pts[j].x, pts[j].y, 0.5f,1);
- dst++;
- }
- }
-
- path->nfill = (int)(dst - verts);
- verts = dst;
-
- // Calculate fringe
- if (fringe) {
- lw = w + woff;
- rw = w - woff;
- lu = 0;
- ru = 1;
- dst = verts;
- path->stroke = dst;
-
- // Create only half a fringe for convex shapes so that
- // the shape can be rendered without stenciling.
- if (convex) {
- lw = woff; // This should generate the same vertex as fill inset above.
- lu = 0.5f; // Set outline fade at middle.
- }
-
- // Looping
- p0 = &pts[path->count-1];
- p1 = &pts[0];
-
- for (j = 0; j < path->count; ++j) {
- if ((p1->flags & (NVG_PT_BEVEL | NVG_PR_INNERBEVEL)) != 0) {
- dst = nvg__bevelJoin(dst, p0, p1, lw, rw, lu, ru, ctx->fringeWidth);
- } else {
- nvg__vset(dst, p1->x + (p1->dmx * lw), p1->y + (p1->dmy * lw), lu,1); dst++;
- nvg__vset(dst, p1->x - (p1->dmx * rw), p1->y - (p1->dmy * rw), ru,1); dst++;
- }
- p0 = p1++;
- }
-
- // Loop it
- nvg__vset(dst, verts[0].x, verts[0].y, lu,1); dst++;
- nvg__vset(dst, verts[1].x, verts[1].y, ru,1); dst++;
-
- path->nstroke = (int)(dst - verts);
- verts = dst;
- } else {
- path->stroke = NULL;
- path->nstroke = 0;
- }
- }
-
- return 1;
-}
-
-
-// Draw
-void nvgBeginPath(NVGcontext* ctx)
-{
- ctx->ncommands = 0;
- nvg__clearPathCache(ctx);
-}
-
-void nvgMoveTo(NVGcontext* ctx, float x, float y)
-{
- float vals[] = { NVG_MOVETO, x, y };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgLineTo(NVGcontext* ctx, float x, float y)
-{
- float vals[] = { NVG_LINETO, x, y };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgBezierTo(NVGcontext* ctx, float c1x, float c1y, float c2x, float c2y, float x, float y)
-{
- float vals[] = { NVG_BEZIERTO, c1x, c1y, c2x, c2y, x, y };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgQuadTo(NVGcontext* ctx, float cx, float cy, float x, float y)
-{
- float x0 = ctx->commandx;
- float y0 = ctx->commandy;
- float vals[] = { NVG_BEZIERTO,
- x0 + 2.0f/3.0f*(cx - x0), y0 + 2.0f/3.0f*(cy - y0),
- x + 2.0f/3.0f*(cx - x), y + 2.0f/3.0f*(cy - y),
- x, y };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgArcTo(NVGcontext* ctx, float x1, float y1, float x2, float y2, float radius)
-{
- float x0 = ctx->commandx;
- float y0 = ctx->commandy;
- float dx0,dy0, dx1,dy1, a, d, cx,cy, a0,a1;
- int dir;
-
- if (ctx->ncommands == 0) {
- return;
- }
-
- // Handle degenerate cases.
- if (nvg__ptEquals(x0,y0, x1,y1, ctx->distTol) ||
- nvg__ptEquals(x1,y1, x2,y2, ctx->distTol) ||
- nvg__distPtSeg(x1,y1, x0,y0, x2,y2) < ctx->distTol*ctx->distTol ||
- radius < ctx->distTol) {
- nvgLineTo(ctx, x1,y1);
- return;
- }
-
- // Calculate tangential circle to lines (x0,y0)-(x1,y1) and (x1,y1)-(x2,y2).
- dx0 = x0-x1;
- dy0 = y0-y1;
- dx1 = x2-x1;
- dy1 = y2-y1;
- nvg__normalize(&dx0,&dy0);
- nvg__normalize(&dx1,&dy1);
- a = nvg__acosf(dx0*dx1 + dy0*dy1);
- d = radius / nvg__tanf(a/2.0f);
-
-// printf("a=%f° d=%f\n", a/NVG_PI*180.0f, d);
-
- if (d > 10000.0f) {
- nvgLineTo(ctx, x1,y1);
- return;
- }
-
- if (nvg__cross(dx0,dy0, dx1,dy1) > 0.0f) {
- cx = x1 + dx0*d + dy0*radius;
- cy = y1 + dy0*d + -dx0*radius;
- a0 = nvg__atan2f(dx0, -dy0);
- a1 = nvg__atan2f(-dx1, dy1);
- dir = NVG_CW;
-// printf("CW c=(%f, %f) a0=%f° a1=%f°\n", cx, cy, a0/NVG_PI*180.0f, a1/NVG_PI*180.0f);
- } else {
- cx = x1 + dx0*d + -dy0*radius;
- cy = y1 + dy0*d + dx0*radius;
- a0 = nvg__atan2f(-dx0, dy0);
- a1 = nvg__atan2f(dx1, -dy1);
- dir = NVG_CCW;
-// printf("CCW c=(%f, %f) a0=%f° a1=%f°\n", cx, cy, a0/NVG_PI*180.0f, a1/NVG_PI*180.0f);
- }
-
- nvgArc(ctx, cx, cy, radius, a0, a1, dir);
-}
-
-void nvgClosePath(NVGcontext* ctx)
-{
- float vals[] = { NVG_CLOSE };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgPathWinding(NVGcontext* ctx, int dir)
-{
- float vals[] = { NVG_WINDING, (float)dir };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgArc(NVGcontext* ctx, float cx, float cy, float r, float a0, float a1, int dir)
-{
- float a = 0, da = 0, hda = 0, kappa = 0;
- float dx = 0, dy = 0, x = 0, y = 0, tanx = 0, tany = 0;
- float px = 0, py = 0, ptanx = 0, ptany = 0;
- float vals[3 + 5*7 + 100];
- int i, ndivs, nvals;
- int move = ctx->ncommands > 0 ? NVG_LINETO : NVG_MOVETO;
-
- // Clamp angles
- da = a1 - a0;
- if (dir == NVG_CW) {
- if (nvg__absf(da) >= NVG_PI*2) {
- da = NVG_PI*2;
- } else {
- while (da < 0.0f) da += NVG_PI*2;
- }
- } else {
- if (nvg__absf(da) >= NVG_PI*2) {
- da = -NVG_PI*2;
- } else {
- while (da > 0.0f) da -= NVG_PI*2;
- }
- }
-
- // Split arc into max 90 degree segments.
- ndivs = nvg__maxi(1, nvg__mini((int)(nvg__absf(da) / (NVG_PI*0.5f) + 0.5f), 5));
- hda = (da / (float)ndivs) / 2.0f;
- kappa = nvg__absf(4.0f / 3.0f * (1.0f - nvg__cosf(hda)) / nvg__sinf(hda));
-
- if (dir == NVG_CCW)
- kappa = -kappa;
-
- nvals = 0;
- for (i = 0; i <= ndivs; i++) {
- a = a0 + da * (i/(float)ndivs);
- dx = nvg__cosf(a);
- dy = nvg__sinf(a);
- x = cx + dx*r;
- y = cy + dy*r;
- tanx = -dy*r*kappa;
- tany = dx*r*kappa;
-
- if (i == 0) {
- vals[nvals++] = (float)move;
- vals[nvals++] = x;
- vals[nvals++] = y;
- } else {
- vals[nvals++] = NVG_BEZIERTO;
- vals[nvals++] = px+ptanx;
- vals[nvals++] = py+ptany;
- vals[nvals++] = x-tanx;
- vals[nvals++] = y-tany;
- vals[nvals++] = x;
- vals[nvals++] = y;
- }
- px = x;
- py = y;
- ptanx = tanx;
- ptany = tany;
- }
-
- nvg__appendCommands(ctx, vals, nvals);
-}
-
-void nvgRect(NVGcontext* ctx, float x, float y, float w, float h)
-{
- float vals[] = {
- NVG_MOVETO, x,y,
- NVG_LINETO, x,y+h,
- NVG_LINETO, x+w,y+h,
- NVG_LINETO, x+w,y,
- NVG_CLOSE
- };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgRoundedRect(NVGcontext* ctx, float x, float y, float w, float h, float r)
-{
- if (r < 0.1f) {
- nvgRect(ctx, x,y,w,h);
- return;
- }
- else {
- float rx = nvg__minf(r, nvg__absf(w)*0.5f) * nvg__signf(w), ry = nvg__minf(r, nvg__absf(h)*0.5f) * nvg__signf(h);
- float vals[] = {
- NVG_MOVETO, x, y+ry,
- NVG_LINETO, x, y+h-ry,
- NVG_BEZIERTO, x, y+h-ry*(1-NVG_KAPPA90), x+rx*(1-NVG_KAPPA90), y+h, x+rx, y+h,
- NVG_LINETO, x+w-rx, y+h,
- NVG_BEZIERTO, x+w-rx*(1-NVG_KAPPA90), y+h, x+w, y+h-ry*(1-NVG_KAPPA90), x+w, y+h-ry,
- NVG_LINETO, x+w, y+ry,
- NVG_BEZIERTO, x+w, y+ry*(1-NVG_KAPPA90), x+w-rx*(1-NVG_KAPPA90), y, x+w-rx, y,
- NVG_LINETO, x+rx, y,
- NVG_BEZIERTO, x+rx*(1-NVG_KAPPA90), y, x, y+ry*(1-NVG_KAPPA90), x, y+ry,
- NVG_CLOSE
- };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
- }
-}
-
-void nvgEllipse(NVGcontext* ctx, float cx, float cy, float rx, float ry)
-{
- float vals[] = {
- NVG_MOVETO, cx-rx, cy,
- NVG_BEZIERTO, cx-rx, cy+ry*NVG_KAPPA90, cx-rx*NVG_KAPPA90, cy+ry, cx, cy+ry,
- NVG_BEZIERTO, cx+rx*NVG_KAPPA90, cy+ry, cx+rx, cy+ry*NVG_KAPPA90, cx+rx, cy,
- NVG_BEZIERTO, cx+rx, cy-ry*NVG_KAPPA90, cx+rx*NVG_KAPPA90, cy-ry, cx, cy-ry,
- NVG_BEZIERTO, cx-rx*NVG_KAPPA90, cy-ry, cx-rx, cy-ry*NVG_KAPPA90, cx-rx, cy,
- NVG_CLOSE
- };
- nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
-}
-
-void nvgCircle(NVGcontext* ctx, float cx, float cy, float r)
-{
- nvgEllipse(ctx, cx,cy, r,r);
-}
-
-void nvgDebugDumpPathCache(NVGcontext* ctx)
-{
- const NVGpath* path;
- int i, j;
-
- printf("Dumping %d cached paths\n", ctx->cache->npaths);
- for (i = 0; i < ctx->cache->npaths; i++) {
- path = &ctx->cache->paths[i];
- printf(" - Path %d\n", i);
- if (path->nfill) {
- printf(" - fill: %d\n", path->nfill);
- for (j = 0; j < path->nfill; j++)
- printf("%f\t%f\n", path->fill[j].x, path->fill[j].y);
- }
- if (path->nstroke) {
- printf(" - stroke: %d\n", path->nstroke);
- for (j = 0; j < path->nstroke; j++)
- printf("%f\t%f\n", path->stroke[j].x, path->stroke[j].y);
- }
- }
-}
-
-void nvgFill(NVGcontext* ctx)
-{
- NVGstate* state = nvg__getState(ctx);
- const NVGpath* path;
- NVGpaint fillPaint = state->fill;
- int i;
-
- nvg__flattenPaths(ctx);
- if (ctx->params.edgeAntiAlias)
- nvg__expandFill(ctx, ctx->fringeWidth, NVG_MITER, 2.4f);
- else
- nvg__expandFill(ctx, 0.0f, NVG_MITER, 2.4f);
-
- // Apply global alpha
- fillPaint.innerColor.a *= state->alpha;
- fillPaint.outerColor.a *= state->alpha;
-
- ctx->params.renderFill(ctx->params.userPtr, &fillPaint, &state->scissor, ctx->fringeWidth,
- ctx->cache->bounds, ctx->cache->paths, ctx->cache->npaths);
-
- // Count triangles
- for (i = 0; i < ctx->cache->npaths; i++) {
- path = &ctx->cache->paths[i];
- ctx->fillTriCount += path->nfill-2;
- ctx->fillTriCount += path->nstroke-2;
- ctx->drawCallCount += 2;
- }
-}
-
-void nvgStroke(NVGcontext* ctx)
-{
- NVGstate* state = nvg__getState(ctx);
- float scale = nvg__getAverageScale(state->xform);
- float strokeWidth = nvg__clampf(state->strokeWidth * scale, 0.0f, 200.0f);
- NVGpaint strokePaint = state->stroke;
- const NVGpath* path;
- int i;
-
- if (strokeWidth < ctx->fringeWidth) {
- // If the stroke width is less than pixel size, use alpha to emulate coverage.
- // Since coverage is area, scale by alpha*alpha.
- float alpha = nvg__clampf(strokeWidth / ctx->fringeWidth, 0.0f, 1.0f);
- strokePaint.innerColor.a *= alpha*alpha;
- strokePaint.outerColor.a *= alpha*alpha;
- strokeWidth = ctx->fringeWidth;
- }
-
- // Apply global alpha
- strokePaint.innerColor.a *= state->alpha;
- strokePaint.outerColor.a *= state->alpha;
-
- nvg__flattenPaths(ctx);
-
- if (ctx->params.edgeAntiAlias)
- nvg__expandStroke(ctx, strokeWidth*0.5f + ctx->fringeWidth*0.5f, state->lineCap, state->lineJoin, state->miterLimit);
- else
- nvg__expandStroke(ctx, strokeWidth*0.5f, state->lineCap, state->lineJoin, state->miterLimit);
-
- ctx->params.renderStroke(ctx->params.userPtr, &strokePaint, &state->scissor, ctx->fringeWidth,
- strokeWidth, ctx->cache->paths, ctx->cache->npaths);
-
- // Count triangles
- for (i = 0; i < ctx->cache->npaths; i++) {
- path = &ctx->cache->paths[i];
- ctx->strokeTriCount += path->nstroke-2;
- ctx->drawCallCount++;
- }
-}
-
-// Add fonts
-int nvgCreateFont(NVGcontext* ctx, const char* name, const char* path)
-{
- return fonsAddFont(ctx->fs, name, path);
-}
-
-int nvgCreateFontMem(NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData)
-{
- return fonsAddFontMem(ctx->fs, name, data, ndata, freeData);
-}
-
-int nvgFindFont(NVGcontext* ctx, const char* name)
-{
- if (name == NULL) return -1;
- return fonsGetFontByName(ctx->fs, name);
-}
-
-// State setting
-void nvgFontSize(NVGcontext* ctx, float size)
-{
- NVGstate* state = nvg__getState(ctx);
- state->fontSize = size;
-}
-
-void nvgFontBlur(NVGcontext* ctx, float blur)
-{
- NVGstate* state = nvg__getState(ctx);
- state->fontBlur = blur;
-}
-
-void nvgTextLetterSpacing(NVGcontext* ctx, float spacing)
-{
- NVGstate* state = nvg__getState(ctx);
- state->letterSpacing = spacing;
-}
-
-void nvgTextLineHeight(NVGcontext* ctx, float lineHeight)
-{
- NVGstate* state = nvg__getState(ctx);
- state->lineHeight = lineHeight;
-}
-
-void nvgTextAlign(NVGcontext* ctx, int align)
-{
- NVGstate* state = nvg__getState(ctx);
- state->textAlign = align;
-}
-
-void nvgFontFaceId(NVGcontext* ctx, int font)
-{
- NVGstate* state = nvg__getState(ctx);
- state->fontId = font;
-}
-
-void nvgFontFace(NVGcontext* ctx, const char* font)
-{
- NVGstate* state = nvg__getState(ctx);
- state->fontId = fonsGetFontByName(ctx->fs, font);
-}
-
-static float nvg__quantize(float a, float d)
-{
- return ((int)(a / d + 0.5f)) * d;
-}
-
-static float nvg__getFontScale(NVGstate* state)
-{
- return nvg__minf(nvg__quantize(nvg__getAverageScale(state->xform), 0.01f), 4.0f);
-}
-
-static void nvg__flushTextTexture(NVGcontext* ctx)
-{
- int dirty[4];
-
- if (fonsValidateTexture(ctx->fs, dirty)) {
- int fontImage = ctx->fontImages[ctx->fontImageIdx];
- // Update texture
- if (fontImage != 0) {
- int iw, ih;
- const unsigned char* data = fonsGetTextureData(ctx->fs, &iw, &ih);
- int x = dirty[0];
- int y = dirty[1];
- int w = dirty[2] - dirty[0];
- int h = dirty[3] - dirty[1];
- ctx->params.renderUpdateTexture(ctx->params.userPtr, fontImage, x,y, w,h, data);
- }
- }
-}
-
-static int nvg__allocTextAtlas(NVGcontext* ctx)
-{
- int iw, ih;
- nvg__flushTextTexture(ctx);
- if (ctx->fontImageIdx >= NVG_MAX_FONTIMAGES-1)
- return 0;
- // if next fontImage already have a texture
- if (ctx->fontImages[ctx->fontImageIdx+1] != 0)
- nvgImageSize(ctx, ctx->fontImages[ctx->fontImageIdx+1], &iw, &ih);
- else { // calculate the new font image size and create it.
- nvgImageSize(ctx, ctx->fontImages[ctx->fontImageIdx], &iw, &ih);
- if (iw > ih)
- ih *= 2;
- else
- iw *= 2;
- if (iw > NVG_MAX_FONTIMAGE_SIZE || ih > NVG_MAX_FONTIMAGE_SIZE)
- iw = ih = NVG_MAX_FONTIMAGE_SIZE;
- ctx->fontImages[ctx->fontImageIdx+1] = ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_ALPHA, iw, ih, 0, NULL);
- }
- ++ctx->fontImageIdx;
- fonsResetAtlas(ctx->fs, iw, ih);
- return 1;
-}
-
-static void nvg__renderText(NVGcontext* ctx, NVGvertex* verts, int nverts)
-{
- NVGstate* state = nvg__getState(ctx);
- NVGpaint paint = state->fill;
-
- // Render triangles.
- paint.image = ctx->fontImages[ctx->fontImageIdx];
-
- // Apply global alpha
- paint.innerColor.a *= state->alpha;
- paint.outerColor.a *= state->alpha;
-
- ctx->params.renderTriangles(ctx->params.userPtr, &paint, &state->scissor, verts, nverts);
-
- ctx->drawCallCount++;
- ctx->textTriCount += nverts/3;
-}
-
-float nvgText(NVGcontext* ctx, float x, float y, const char* string, const char* end)
-{
- NVGstate* state = nvg__getState(ctx);
- FONStextIter iter, prevIter;
- FONSquad q;
- NVGvertex* verts;
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
- int cverts = 0;
- int nverts = 0;
-
- if (end == NULL)
- end = string + strlen(string);
-
- if (state->fontId == FONS_INVALID) return x;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
-
- cverts = nvg__maxi(2, (int)(end - string)) * 6; // conservative estimate.
- verts = nvg__allocTempVerts(ctx, cverts);
- if (verts == NULL) return x;
-
- fonsTextIterInit(ctx->fs, &iter, x*scale, y*scale, string, end);
- prevIter = iter;
- while (fonsTextIterNext(ctx->fs, &iter, &q)) {
- float c[4*2];
- if (iter.prevGlyphIndex == -1) { // can not retrieve glyph?
- if (!nvg__allocTextAtlas(ctx))
- break; // no memory :(
- if (nverts != 0) {
- nvg__renderText(ctx, verts, nverts);
- nverts = 0;
- }
- iter = prevIter;
- fonsTextIterNext(ctx->fs, &iter, &q); // try again
- if (iter.prevGlyphIndex == -1) // still can not find glyph?
- break;
- }
- prevIter = iter;
- // Transform corners.
- nvgTransformPoint(&c[0],&c[1], state->xform, q.x0*invscale, q.y0*invscale);
- nvgTransformPoint(&c[2],&c[3], state->xform, q.x1*invscale, q.y0*invscale);
- nvgTransformPoint(&c[4],&c[5], state->xform, q.x1*invscale, q.y1*invscale);
- nvgTransformPoint(&c[6],&c[7], state->xform, q.x0*invscale, q.y1*invscale);
- // Create triangles
- if (nverts+6 <= cverts) {
- nvg__vset(&verts[nverts], c[0], c[1], q.s0, q.t0); nverts++;
- nvg__vset(&verts[nverts], c[4], c[5], q.s1, q.t1); nverts++;
- nvg__vset(&verts[nverts], c[2], c[3], q.s1, q.t0); nverts++;
- nvg__vset(&verts[nverts], c[0], c[1], q.s0, q.t0); nverts++;
- nvg__vset(&verts[nverts], c[6], c[7], q.s0, q.t1); nverts++;
- nvg__vset(&verts[nverts], c[4], c[5], q.s1, q.t1); nverts++;
- }
- }
-
- // TODO: add back-end bit to do this just once per frame.
- nvg__flushTextTexture(ctx);
-
- nvg__renderText(ctx, verts, nverts);
-
- return iter.x;
-}
-
-void nvgTextBox(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end)
-{
- NVGstate* state = nvg__getState(ctx);
- NVGtextRow rows[2];
- int nrows = 0, i;
- int oldAlign = state->textAlign;
- int haling = state->textAlign & (NVG_ALIGN_LEFT | NVG_ALIGN_CENTER | NVG_ALIGN_RIGHT);
- int valign = state->textAlign & (NVG_ALIGN_TOP | NVG_ALIGN_MIDDLE | NVG_ALIGN_BOTTOM | NVG_ALIGN_BASELINE);
- float lineh = 0;
-
- if (state->fontId == FONS_INVALID) return;
-
- nvgTextMetrics(ctx, NULL, NULL, &lineh);
-
- state->textAlign = NVG_ALIGN_LEFT | valign;
-
- while ((nrows = nvgTextBreakLines(ctx, string, end, breakRowWidth, rows, 2))) {
- for (i = 0; i < nrows; i++) {
- NVGtextRow* row = &rows[i];
- if (haling & NVG_ALIGN_LEFT)
- nvgText(ctx, x, y, row->start, row->end);
- else if (haling & NVG_ALIGN_CENTER)
- nvgText(ctx, x + breakRowWidth*0.5f - row->width*0.5f, y, row->start, row->end);
- else if (haling & NVG_ALIGN_RIGHT)
- nvgText(ctx, x + breakRowWidth - row->width, y, row->start, row->end);
- y += lineh * state->lineHeight;
- }
- string = rows[nrows-1].next;
- }
-
- state->textAlign = oldAlign;
-}
-
-int nvgTextGlyphPositions(NVGcontext* ctx, float x, float y, const char* string, const char* end, NVGglyphPosition* positions, int maxPositions)
-{
- NVGstate* state = nvg__getState(ctx);
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
- FONStextIter iter, prevIter;
- FONSquad q;
- int npos = 0;
-
- if (state->fontId == FONS_INVALID) return 0;
-
- if (end == NULL)
- end = string + strlen(string);
-
- if (string == end)
- return 0;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
-
- fonsTextIterInit(ctx->fs, &iter, x*scale, y*scale, string, end);
- prevIter = iter;
- while (fonsTextIterNext(ctx->fs, &iter, &q)) {
- if (iter.prevGlyphIndex < 0 && nvg__allocTextAtlas(ctx)) { // can not retrieve glyph?
- iter = prevIter;
- fonsTextIterNext(ctx->fs, &iter, &q); // try again
- }
- prevIter = iter;
- positions[npos].str = iter.str;
- positions[npos].x = iter.x * invscale;
- positions[npos].minx = nvg__minf(iter.x, q.x0) * invscale;
- positions[npos].maxx = nvg__maxf(iter.nextx, q.x1) * invscale;
- npos++;
- if (npos >= maxPositions)
- break;
- }
-
- return npos;
-}
-
-enum NVGcodepointType {
- NVG_SPACE,
- NVG_NEWLINE,
- NVG_CHAR,
-};
-
-int nvgTextBreakLines(NVGcontext* ctx, const char* string, const char* end, float breakRowWidth, NVGtextRow* rows, int maxRows)
-{
- NVGstate* state = nvg__getState(ctx);
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
- FONStextIter iter, prevIter;
- FONSquad q;
- int nrows = 0;
- float rowStartX = 0;
- float rowWidth = 0;
- float rowMinX = 0;
- float rowMaxX = 0;
- const char* rowStart = NULL;
- const char* rowEnd = NULL;
- const char* wordStart = NULL;
- float wordStartX = 0;
- float wordMinX = 0;
- const char* breakEnd = NULL;
- float breakWidth = 0;
- float breakMaxX = 0;
- int type = NVG_SPACE, ptype = NVG_SPACE;
- unsigned int pcodepoint = 0;
-
- if (maxRows == 0) return 0;
- if (state->fontId == FONS_INVALID) return 0;
-
- if (end == NULL)
- end = string + strlen(string);
-
- if (string == end) return 0;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
-
- breakRowWidth *= scale;
-
- fonsTextIterInit(ctx->fs, &iter, 0, 0, string, end);
- prevIter = iter;
- while (fonsTextIterNext(ctx->fs, &iter, &q)) {
- if (iter.prevGlyphIndex < 0 && nvg__allocTextAtlas(ctx)) { // can not retrieve glyph?
- iter = prevIter;
- fonsTextIterNext(ctx->fs, &iter, &q); // try again
- }
- prevIter = iter;
- switch (iter.codepoint) {
- case 9: // \t
- case 11: // \v
- case 12: // \f
- case 32: // space
- case 0x00a0: // NBSP
- type = NVG_SPACE;
- break;
- case 10: // \n
- type = pcodepoint == 13 ? NVG_SPACE : NVG_NEWLINE;
- break;
- case 13: // \r
- type = pcodepoint == 10 ? NVG_SPACE : NVG_NEWLINE;
- break;
- case 0x0085: // NEL
- type = NVG_NEWLINE;
- break;
- default:
- type = NVG_CHAR;
- break;
- }
-
- if (type == NVG_NEWLINE) {
- // Always handle new lines.
- rows[nrows].start = rowStart != NULL ? rowStart : iter.str;
- rows[nrows].end = rowEnd != NULL ? rowEnd : iter.str;
- rows[nrows].width = rowWidth * invscale;
- rows[nrows].minx = rowMinX * invscale;
- rows[nrows].maxx = rowMaxX * invscale;
- rows[nrows].next = iter.next;
- nrows++;
- if (nrows >= maxRows)
- return nrows;
- // Set null break point
- breakEnd = rowStart;
- breakWidth = 0.0;
- breakMaxX = 0.0;
- // Indicate to skip the white space at the beginning of the row.
- rowStart = NULL;
- rowEnd = NULL;
- rowWidth = 0;
- rowMinX = rowMaxX = 0;
- } else {
- if (rowStart == NULL) {
- // Skip white space until the beginning of the line
- if (type == NVG_CHAR) {
- // The current char is the row so far
- rowStartX = iter.x;
- rowStart = iter.str;
- rowEnd = iter.next;
- rowWidth = iter.nextx - rowStartX; // q.x1 - rowStartX;
- rowMinX = q.x0 - rowStartX;
- rowMaxX = q.x1 - rowStartX;
- wordStart = iter.str;
- wordStartX = iter.x;
- wordMinX = q.x0 - rowStartX;
- // Set null break point
- breakEnd = rowStart;
- breakWidth = 0.0;
- breakMaxX = 0.0;
- }
- } else {
- float nextWidth = iter.nextx - rowStartX;
-
- // track last non-white space character
- if (type == NVG_CHAR) {
- rowEnd = iter.next;
- rowWidth = iter.nextx - rowStartX;
- rowMaxX = q.x1 - rowStartX;
- }
- // track last end of a word
- if (ptype == NVG_CHAR && type == NVG_SPACE) {
- breakEnd = iter.str;
- breakWidth = rowWidth;
- breakMaxX = rowMaxX;
- }
- // track last beginning of a word
- if (ptype == NVG_SPACE && type == NVG_CHAR) {
- wordStart = iter.str;
- wordStartX = iter.x;
- wordMinX = q.x0 - rowStartX;
- }
-
- // Break to new line when a character is beyond break width.
- if (type == NVG_CHAR && nextWidth > breakRowWidth) {
- // The run length is too long, need to break to new line.
- if (breakEnd == rowStart) {
- // The current word is longer than the row length, just break it from here.
- rows[nrows].start = rowStart;
- rows[nrows].end = iter.str;
- rows[nrows].width = rowWidth * invscale;
- rows[nrows].minx = rowMinX * invscale;
- rows[nrows].maxx = rowMaxX * invscale;
- rows[nrows].next = iter.str;
- nrows++;
- if (nrows >= maxRows)
- return nrows;
- rowStartX = iter.x;
- rowStart = iter.str;
- rowEnd = iter.next;
- rowWidth = iter.nextx - rowStartX;
- rowMinX = q.x0 - rowStartX;
- rowMaxX = q.x1 - rowStartX;
- wordStart = iter.str;
- wordStartX = iter.x;
- wordMinX = q.x0 - rowStartX;
- } else {
- // Break the line from the end of the last word, and start new line from the beginning of the new.
- rows[nrows].start = rowStart;
- rows[nrows].end = breakEnd;
- rows[nrows].width = breakWidth * invscale;
- rows[nrows].minx = rowMinX * invscale;
- rows[nrows].maxx = breakMaxX * invscale;
- rows[nrows].next = wordStart;
- nrows++;
- if (nrows >= maxRows)
- return nrows;
- rowStartX = wordStartX;
- rowStart = wordStart;
- rowEnd = iter.next;
- rowWidth = iter.nextx - rowStartX;
- rowMinX = wordMinX;
- rowMaxX = q.x1 - rowStartX;
- // No change to the word start
- }
- // Set null break point
- breakEnd = rowStart;
- breakWidth = 0.0;
- breakMaxX = 0.0;
- }
- }
- }
-
- pcodepoint = iter.codepoint;
- ptype = type;
- }
-
- // Break the line from the end of the last word, and start new line from the beginning of the new.
- if (rowStart != NULL) {
- rows[nrows].start = rowStart;
- rows[nrows].end = rowEnd;
- rows[nrows].width = rowWidth * invscale;
- rows[nrows].minx = rowMinX * invscale;
- rows[nrows].maxx = rowMaxX * invscale;
- rows[nrows].next = end;
- nrows++;
- }
-
- return nrows;
-}
-
-float nvgTextBounds(NVGcontext* ctx, float x, float y, const char* string, const char* end, float* bounds)
-{
- NVGstate* state = nvg__getState(ctx);
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
- float width;
-
- if (state->fontId == FONS_INVALID) return 0;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
-
- width = fonsTextBounds(ctx->fs, x*scale, y*scale, string, end, bounds);
- if (bounds != NULL) {
- // Use line bounds for height.
- fonsLineBounds(ctx->fs, y*scale, &bounds[1], &bounds[3]);
- bounds[0] *= invscale;
- bounds[1] *= invscale;
- bounds[2] *= invscale;
- bounds[3] *= invscale;
- }
- return width * invscale;
-}
-
-void nvgTextBoxBounds(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end, float* bounds)
-{
- NVGstate* state = nvg__getState(ctx);
- NVGtextRow rows[2];
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
- int nrows = 0, i;
- int oldAlign = state->textAlign;
- int haling = state->textAlign & (NVG_ALIGN_LEFT | NVG_ALIGN_CENTER | NVG_ALIGN_RIGHT);
- int valign = state->textAlign & (NVG_ALIGN_TOP | NVG_ALIGN_MIDDLE | NVG_ALIGN_BOTTOM | NVG_ALIGN_BASELINE);
- float lineh = 0, rminy = 0, rmaxy = 0;
- float minx, miny, maxx, maxy;
-
- if (state->fontId == FONS_INVALID) {
- if (bounds != NULL)
- bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0f;
- return;
- }
-
- nvgTextMetrics(ctx, NULL, NULL, &lineh);
-
- state->textAlign = NVG_ALIGN_LEFT | valign;
-
- minx = maxx = x;
- miny = maxy = y;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
- fonsLineBounds(ctx->fs, 0, &rminy, &rmaxy);
- rminy *= invscale;
- rmaxy *= invscale;
-
- while ((nrows = nvgTextBreakLines(ctx, string, end, breakRowWidth, rows, 2))) {
- for (i = 0; i < nrows; i++) {
- NVGtextRow* row = &rows[i];
- float rminx, rmaxx, dx = 0;
- // Horizontal bounds
- if (haling & NVG_ALIGN_LEFT)
- dx = 0;
- else if (haling & NVG_ALIGN_CENTER)
- dx = breakRowWidth*0.5f - row->width*0.5f;
- else if (haling & NVG_ALIGN_RIGHT)
- dx = breakRowWidth - row->width;
- rminx = x + row->minx + dx;
- rmaxx = x + row->maxx + dx;
- minx = nvg__minf(minx, rminx);
- maxx = nvg__maxf(maxx, rmaxx);
- // Vertical bounds.
- miny = nvg__minf(miny, y + rminy);
- maxy = nvg__maxf(maxy, y + rmaxy);
-
- y += lineh * state->lineHeight;
- }
- string = rows[nrows-1].next;
- }
-
- state->textAlign = oldAlign;
-
- if (bounds != NULL) {
- bounds[0] = minx;
- bounds[1] = miny;
- bounds[2] = maxx;
- bounds[3] = maxy;
- }
-}
-
-void nvgTextMetrics(NVGcontext* ctx, float* ascender, float* descender, float* lineh)
-{
- NVGstate* state = nvg__getState(ctx);
- float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
- float invscale = 1.0f / scale;
-
- if (state->fontId == FONS_INVALID) return;
-
- fonsSetSize(ctx->fs, state->fontSize*scale);
- fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
- fonsSetBlur(ctx->fs, state->fontBlur*scale);
- fonsSetAlign(ctx->fs, state->textAlign);
- fonsSetFont(ctx->fs, state->fontId);
-
- fonsVertMetrics(ctx->fs, ascender, descender, lineh);
- if (ascender != NULL)
- *ascender *= invscale;
- if (descender != NULL)
- *descender *= invscale;
- if (lineh != NULL)
- *lineh *= invscale;
-}
-// vim: ft=c nu noet ts=4
diff --git a/dgl/src/nanovg2/nanovg.h b/dgl/src/nanovg2/nanovg.h
@@ -1,620 +0,0 @@
-//
-// Copyright (c) 2013 Mikko Mononen memon@inside.org
-//
-// This software is provided 'as-is', without any express or implied
-// warranty. In no event will the authors be held liable for any damages
-// arising from the use of this software.
-// Permission is granted to anyone to use this software for any purpose,
-// including commercial applications, and to alter it and redistribute it
-// freely, subject to the following restrictions:
-// 1. The origin of this software must not be misrepresented; you must not
-// claim that you wrote the original software. If you use this software
-// in a product, an acknowledgment in the product documentation would be
-// appreciated but is not required.
-// 2. Altered source versions must be plainly marked as such, and must not be
-// misrepresented as being the original software.
-// 3. This notice may not be removed or altered from any source distribution.
-//
-
-#ifndef NANOVG_H
-#define NANOVG_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define NVG_PI 3.14159265358979323846264338327f
-
-#ifdef _MSC_VER
-#pragma warning(push)
-#pragma warning(disable: 4201) // nonstandard extension used : nameless struct/union
-#endif
-
-typedef struct NVGcontext NVGcontext;
-
-struct NVGcolor {
- union {
- float rgba[4];
- struct {
- float r,g,b,a;
- };
- };
-};
-typedef struct NVGcolor NVGcolor;
-
-struct NVGpaint {
- float xform[6];
- float extent[2];
- float radius;
- float feather;
- NVGcolor innerColor;
- NVGcolor outerColor;
- int image;
-};
-typedef struct NVGpaint NVGpaint;
-
-enum NVGwinding {
- NVG_CCW = 1, // Winding for solid shapes
- NVG_CW = 2, // Winding for holes
-};
-
-enum NVGsolidity {
- NVG_SOLID = 1, // CCW
- NVG_HOLE = 2, // CW
-};
-
-enum NVGlineCap {
- NVG_BUTT,
- NVG_ROUND,
- NVG_SQUARE,
- NVG_BEVEL,
- NVG_MITER,
-};
-
-enum NVGalign {
- // Horizontal align
- NVG_ALIGN_LEFT = 1<<0, // Default, align text horizontally to left.
- NVG_ALIGN_CENTER = 1<<1, // Align text horizontally to center.
- NVG_ALIGN_RIGHT = 1<<2, // Align text horizontally to right.
- // Vertical align
- NVG_ALIGN_TOP = 1<<3, // Align text vertically to top.
- NVG_ALIGN_MIDDLE = 1<<4, // Align text vertically to middle.
- NVG_ALIGN_BOTTOM = 1<<5, // Align text vertically to bottom.
- NVG_ALIGN_BASELINE = 1<<6, // Default, align text vertically to baseline.
-};
-
-struct NVGglyphPosition {
- const char* str; // Position of the glyph in the input string.
- float x; // The x-coordinate of the logical glyph position.
- float minx, maxx; // The bounds of the glyph shape.
-};
-typedef struct NVGglyphPosition NVGglyphPosition;
-
-struct NVGtextRow {
- const char* start; // Pointer to the input text where the row starts.
- const char* end; // Pointer to the input text where the row ends (one past the last character).
- const char* next; // Pointer to the beginning of the next row.
- float width; // Logical width of the row.
- float minx, maxx; // Actual bounds of the row. Logical with and bounds can differ because of kerning and some parts over extending.
-};
-typedef struct NVGtextRow NVGtextRow;
-
-enum NVGimageFlags {
- NVG_IMAGE_GENERATE_MIPMAPS = 1<<0, // Generate mipmaps during creation of the image.
- NVG_IMAGE_REPEATX = 1<<1, // Repeat image in X direction.
- NVG_IMAGE_REPEATY = 1<<2, // Repeat image in Y direction.
- NVG_IMAGE_FLIPY = 1<<3, // Flips (inverses) image in Y direction when rendered.
- NVG_IMAGE_PREMULTIPLIED = 1<<4, // Image data has premultiplied alpha.
-};
-
-// Begin drawing a new frame
-// Calls to nanovg drawing API should be wrapped in nvgBeginFrame() & nvgEndFrame()
-// nvgBeginFrame() defines the size of the window to render to in relation currently
-// set viewport (i.e. glViewport on GL backends). Device pixel ration allows to
-// control the rendering on Hi-DPI devices.
-// For example, GLFW returns two dimension for an opened window: window size and
-// frame buffer size. In that case you would set windowWidth/Height to the window size
-// devicePixelRatio to: frameBufferWidth / windowWidth.
-void nvgBeginFrame(NVGcontext* ctx, int windowWidth, int windowHeight, float devicePixelRatio);
-
-// Cancels drawing the current frame.
-void nvgCancelFrame(NVGcontext* ctx);
-
-// Ends drawing flushing remaining render state.
-void nvgEndFrame(NVGcontext* ctx);
-
-//
-// Color utils
-//
-// Colors in NanoVG are stored as unsigned ints in ABGR format.
-
-// Returns a color value from red, green, blue values. Alpha will be set to 255 (1.0f).
-NVGcolor nvgRGB(unsigned char r, unsigned char g, unsigned char b);
-
-// Returns a color value from red, green, blue values. Alpha will be set to 1.0f.
-NVGcolor nvgRGBf(float r, float g, float b);
-
-
-// Returns a color value from red, green, blue and alpha values.
-NVGcolor nvgRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a);
-
-// Returns a color value from red, green, blue and alpha values.
-NVGcolor nvgRGBAf(float r, float g, float b, float a);
-
-
-// Linearly interpolates from color c0 to c1, and returns resulting color value.
-NVGcolor nvgLerpRGBA(NVGcolor c0, NVGcolor c1, float u);
-
-// Sets transparency of a color value.
-NVGcolor nvgTransRGBA(NVGcolor c0, unsigned char a);
-
-// Sets transparency of a color value.
-NVGcolor nvgTransRGBAf(NVGcolor c0, float a);
-
-// Returns color value specified by hue, saturation and lightness.
-// HSL values are all in range [0..1], alpha will be set to 255.
-NVGcolor nvgHSL(float h, float s, float l);
-
-// Returns color value specified by hue, saturation and lightness and alpha.
-// HSL values are all in range [0..1], alpha in range [0..255]
-NVGcolor nvgHSLA(float h, float s, float l, unsigned char a);
-
-//
-// State Handling
-//
-// NanoVG contains state which represents how paths will be rendered.
-// The state contains transform, fill and stroke styles, text and font styles,
-// and scissor clipping.
-
-// Pushes and saves the current render state into a state stack.
-// A matching nvgRestore() must be used to restore the state.
-void nvgSave(NVGcontext* ctx);
-
-// Pops and restores current render state.
-void nvgRestore(NVGcontext* ctx);
-
-// Resets current render state to default values. Does not affect the render state stack.
-void nvgReset(NVGcontext* ctx);
-
-//
-// Render styles
-//
-// Fill and stroke render style can be either a solid color or a paint which is a gradient or a pattern.
-// Solid color is simply defined as a color value, different kinds of paints can be created
-// using nvgLinearGradient(), nvgBoxGradient(), nvgRadialGradient() and nvgImagePattern().
-//
-// Current render style can be saved and restored using nvgSave() and nvgRestore().
-
-// Sets current stroke style to a solid color.
-void nvgStrokeColor(NVGcontext* ctx, NVGcolor color);
-
-// Sets current stroke style to a paint, which can be a one of the gradients or a pattern.
-void nvgStrokePaint(NVGcontext* ctx, NVGpaint paint);
-
-// Sets current fill style to a solid color.
-void nvgFillColor(NVGcontext* ctx, NVGcolor color);
-
-// Sets current fill style to a paint, which can be a one of the gradients or a pattern.
-void nvgFillPaint(NVGcontext* ctx, NVGpaint paint);
-
-// Sets the miter limit of the stroke style.
-// Miter limit controls when a sharp corner is beveled.
-void nvgMiterLimit(NVGcontext* ctx, float limit);
-
-// Sets the stroke width of the stroke style.
-void nvgStrokeWidth(NVGcontext* ctx, float size);
-
-// Sets how the end of the line (cap) is drawn,
-// Can be one of: NVG_BUTT (default), NVG_ROUND, NVG_SQUARE.
-void nvgLineCap(NVGcontext* ctx, int cap);
-
-// Sets how sharp path corners are drawn.
-// Can be one of NVG_MITER (default), NVG_ROUND, NVG_BEVEL.
-void nvgLineJoin(NVGcontext* ctx, int join);
-
-// Sets the transparency applied to all rendered shapes.
-// Already transparent paths will get proportionally more transparent as well.
-void nvgGlobalAlpha(NVGcontext* ctx, float alpha);
-
-//
-// Transforms
-//
-// The paths, gradients, patterns and scissor region are transformed by an transformation
-// matrix at the time when they are passed to the API.
-// The current transformation matrix is a affine matrix:
-// [sx kx tx]
-// [ky sy ty]
-// [ 0 0 1]
-// Where: sx,sy define scaling, kx,ky skewing, and tx,ty translation.
-// The last row is assumed to be 0,0,1 and is not stored.
-//
-// Apart from nvgResetTransform(), each transformation function first creates
-// specific transformation matrix and pre-multiplies the current transformation by it.
-//
-// Current coordinate system (transformation) can be saved and restored using nvgSave() and nvgRestore().
-
-// Resets current transform to a identity matrix.
-void nvgResetTransform(NVGcontext* ctx);
-
-// Premultiplies current coordinate system by specified matrix.
-// The parameters are interpreted as matrix as follows:
-// [a c e]
-// [b d f]
-// [0 0 1]
-void nvgTransform(NVGcontext* ctx, float a, float b, float c, float d, float e, float f);
-
-// Translates current coordinate system.
-void nvgTranslate(NVGcontext* ctx, float x, float y);
-
-// Rotates current coordinate system. Angle is specified in radians.
-void nvgRotate(NVGcontext* ctx, float angle);
-
-// Skews the current coordinate system along X axis. Angle is specified in radians.
-void nvgSkewX(NVGcontext* ctx, float angle);
-
-// Skews the current coordinate system along Y axis. Angle is specified in radians.
-void nvgSkewY(NVGcontext* ctx, float angle);
-
-// Scales the current coordinate system.
-void nvgScale(NVGcontext* ctx, float x, float y);
-
-// Stores the top part (a-f) of the current transformation matrix in to the specified buffer.
-// [a c e]
-// [b d f]
-// [0 0 1]
-// There should be space for 6 floats in the return buffer for the values a-f.
-void nvgCurrentTransform(NVGcontext* ctx, float* xform);
-
-
-// The following functions can be used to make calculations on 2x3 transformation matrices.
-// A 2x3 matrix is represented as float[6].
-
-// Sets the transform to identity matrix.
-void nvgTransformIdentity(float* dst);
-
-// Sets the transform to translation matrix matrix.
-void nvgTransformTranslate(float* dst, float tx, float ty);
-
-// Sets the transform to scale matrix.
-void nvgTransformScale(float* dst, float sx, float sy);
-
-// Sets the transform to rotate matrix. Angle is specified in radians.
-void nvgTransformRotate(float* dst, float a);
-
-// Sets the transform to skew-x matrix. Angle is specified in radians.
-void nvgTransformSkewX(float* dst, float a);
-
-// Sets the transform to skew-y matrix. Angle is specified in radians.
-void nvgTransformSkewY(float* dst, float a);
-
-// Sets the transform to the result of multiplication of two transforms, of A = A*B.
-void nvgTransformMultiply(float* dst, const float* src);
-
-// Sets the transform to the result of multiplication of two transforms, of A = B*A.
-void nvgTransformPremultiply(float* dst, const float* src);
-
-// Sets the destination to inverse of specified transform.
-// Returns 1 if the inverse could be calculated, else 0.
-int nvgTransformInverse(float* dst, const float* src);
-
-// Transform a point by given transform.
-void nvgTransformPoint(float* dstx, float* dsty, const float* xform, float srcx, float srcy);
-
-// Converts degrees to radians and vice versa.
-float nvgDegToRad(float deg);
-float nvgRadToDeg(float rad);
-
-//
-// Images
-//
-// NanoVG allows you to load jpg, png, psd, tga, pic and gif files to be used for rendering.
-// In addition you can upload your own image. The image loading is provided by stb_image.
-// The parameter imageFlags is combination of flags defined in NVGimageFlags.
-
-// Creates image by loading it from the disk from specified file name.
-// Returns handle to the image.
-int nvgCreateImage(NVGcontext* ctx, const char* filename, int imageFlags);
-
-// Creates image by loading it from the specified chunk of memory.
-// Returns handle to the image.
-int nvgCreateImageMem(NVGcontext* ctx, int imageFlags, unsigned char* data, int ndata);
-
-// Creates image from specified image data.
-// Returns handle to the image.
-int nvgCreateImageRGBA(NVGcontext* ctx, int w, int h, int imageFlags, const unsigned char* data);
-
-// Updates image data specified by image handle.
-void nvgUpdateImage(NVGcontext* ctx, int image, const unsigned char* data);
-
-// Returns the dimensions of a created image.
-void nvgImageSize(NVGcontext* ctx, int image, int* w, int* h);
-
-// Deletes created image.
-void nvgDeleteImage(NVGcontext* ctx, int image);
-
-//
-// Paints
-//
-// NanoVG supports four types of paints: linear gradient, box gradient, radial gradient and image pattern.
-// These can be used as paints for strokes and fills.
-
-// Creates and returns a linear gradient. Parameters (sx,sy)-(ex,ey) specify the start and end coordinates
-// of the linear gradient, icol specifies the start color and ocol the end color.
-// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint().
-NVGpaint nvgLinearGradient(NVGcontext* ctx, float sx, float sy, float ex, float ey,
- NVGcolor icol, NVGcolor ocol);
-
-// Creates and returns a box gradient. Box gradient is a feathered rounded rectangle, it is useful for rendering
-// drop shadows or highlights for boxes. Parameters (x,y) define the top-left corner of the rectangle,
-// (w,h) define the size of the rectangle, r defines the corner radius, and f feather. Feather defines how blurry
-// the border of the rectangle is. Parameter icol specifies the inner color and ocol the outer color of the gradient.
-// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint().
-NVGpaint nvgBoxGradient(NVGcontext* ctx, float x, float y, float w, float h,
- float r, float f, NVGcolor icol, NVGcolor ocol);
-
-// Creates and returns a radial gradient. Parameters (cx,cy) specify the center, inr and outr specify
-// the inner and outer radius of the gradient, icol specifies the start color and ocol the end color.
-// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint().
-NVGpaint nvgRadialGradient(NVGcontext* ctx, float cx, float cy, float inr, float outr,
- NVGcolor icol, NVGcolor ocol);
-
-// Creates and returns an image patter. Parameters (ox,oy) specify the left-top location of the image pattern,
-// (ex,ey) the size of one image, angle rotation around the top-left corner, image is handle to the image to render.
-// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint().
-NVGpaint nvgImagePattern(NVGcontext* ctx, float ox, float oy, float ex, float ey,
- float angle, int image, float alpha);
-
-//
-// Scissoring
-//
-// Scissoring allows you to clip the rendering into a rectangle. This is useful for various
-// user interface cases like rendering a text edit or a timeline.
-
-// Sets the current scissor rectangle.
-// The scissor rectangle is transformed by the current transform.
-void nvgScissor(NVGcontext* ctx, float x, float y, float w, float h);
-
-// Intersects current scissor rectangle with the specified rectangle.
-// The scissor rectangle is transformed by the current transform.
-// Note: in case the rotation of previous scissor rect differs from
-// the current one, the intersection will be done between the specified
-// rectangle and the previous scissor rectangle transformed in the current
-// transform space. The resulting shape is always rectangle.
-void nvgIntersectScissor(NVGcontext* ctx, float x, float y, float w, float h);
-
-// Reset and disables scissoring.
-void nvgResetScissor(NVGcontext* ctx);
-
-//
-// Paths
-//
-// Drawing a new shape starts with nvgBeginPath(), it clears all the currently defined paths.
-// Then you define one or more paths and sub-paths which describe the shape. The are functions
-// to draw common shapes like rectangles and circles, and lower level step-by-step functions,
-// which allow to define a path curve by curve.
-//
-// NanoVG uses even-odd fill rule to draw the shapes. Solid shapes should have counter clockwise
-// winding and holes should have counter clockwise order. To specify winding of a path you can
-// call nvgPathWinding(). This is useful especially for the common shapes, which are drawn CCW.
-//
-// Finally you can fill the path using current fill style by calling nvgFill(), and stroke it
-// with current stroke style by calling nvgStroke().
-//
-// The curve segments and sub-paths are transformed by the current transform.
-
-// Clears the current path and sub-paths.
-void nvgBeginPath(NVGcontext* ctx);
-
-// Starts new sub-path with specified point as first point.
-void nvgMoveTo(NVGcontext* ctx, float x, float y);
-
-// Adds line segment from the last point in the path to the specified point.
-void nvgLineTo(NVGcontext* ctx, float x, float y);
-
-// Adds cubic bezier segment from last point in the path via two control points to the specified point.
-void nvgBezierTo(NVGcontext* ctx, float c1x, float c1y, float c2x, float c2y, float x, float y);
-
-// Adds quadratic bezier segment from last point in the path via a control point to the specified point.
-void nvgQuadTo(NVGcontext* ctx, float cx, float cy, float x, float y);
-
-// Adds an arc segment at the corner defined by the last path point, and two specified points.
-void nvgArcTo(NVGcontext* ctx, float x1, float y1, float x2, float y2, float radius);
-
-// Closes current sub-path with a line segment.
-void nvgClosePath(NVGcontext* ctx);
-
-// Sets the current sub-path winding, see NVGwinding and NVGsolidity.
-void nvgPathWinding(NVGcontext* ctx, int dir);
-
-// Creates new circle arc shaped sub-path. The arc center is at cx,cy, the arc radius is r,
-// and the arc is drawn from angle a0 to a1, and swept in direction dir (NVG_CCW, or NVG_CW).
-// Angles are specified in radians.
-void nvgArc(NVGcontext* ctx, float cx, float cy, float r, float a0, float a1, int dir);
-
-// Creates new rectangle shaped sub-path.
-void nvgRect(NVGcontext* ctx, float x, float y, float w, float h);
-
-// Creates new rounded rectangle shaped sub-path.
-void nvgRoundedRect(NVGcontext* ctx, float x, float y, float w, float h, float r);
-
-// Creates new ellipse shaped sub-path.
-void nvgEllipse(NVGcontext* ctx, float cx, float cy, float rx, float ry);
-
-// Creates new circle shaped sub-path.
-void nvgCircle(NVGcontext* ctx, float cx, float cy, float r);
-
-// Fills the current path with current fill style.
-void nvgFill(NVGcontext* ctx);
-
-// Fills the current path with current stroke style.
-void nvgStroke(NVGcontext* ctx);
-
-
-//
-// Text
-//
-// NanoVG allows you to load .ttf files and use the font to render text.
-//
-// The appearance of the text can be defined by setting the current text style
-// and by specifying the fill color. Common text and font settings such as
-// font size, letter spacing and text align are supported. Font blur allows you
-// to create simple text effects such as drop shadows.
-//
-// At render time the font face can be set based on the font handles or name.
-//
-// Font measure functions return values in local space, the calculations are
-// carried in the same resolution as the final rendering. This is done because
-// the text glyph positions are snapped to the nearest pixels sharp rendering.
-//
-// The local space means that values are not rotated or scale as per the current
-// transformation. For example if you set font size to 12, which would mean that
-// line height is 16, then regardless of the current scaling and rotation, the
-// returned line height is always 16. Some measures may vary because of the scaling
-// since aforementioned pixel snapping.
-//
-// While this may sound a little odd, the setup allows you to always render the
-// same way regardless of scaling. I.e. following works regardless of scaling:
-//
-// const char* txt = "Text me up.";
-// nvgTextBounds(vg, x,y, txt, NULL, bounds);
-// nvgBeginPath(vg);
-// nvgRoundedRect(vg, bounds[0],bounds[1], bounds[2]-bounds[0], bounds[3]-bounds[1]);
-// nvgFill(vg);
-//
-// Note: currently only solid color fill is supported for text.
-
-// Creates font by loading it from the disk from specified file name.
-// Returns handle to the font.
-int nvgCreateFont(NVGcontext* ctx, const char* name, const char* filename);
-
-// Creates image by loading it from the specified memory chunk.
-// Returns handle to the font.
-int nvgCreateFontMem(NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData);
-
-// Finds a loaded font of specified name, and returns handle to it, or -1 if the font is not found.
-int nvgFindFont(NVGcontext* ctx, const char* name);
-
-// Sets the font size of current text style.
-void nvgFontSize(NVGcontext* ctx, float size);
-
-// Sets the blur of current text style.
-void nvgFontBlur(NVGcontext* ctx, float blur);
-
-// Sets the letter spacing of current text style.
-void nvgTextLetterSpacing(NVGcontext* ctx, float spacing);
-
-// Sets the proportional line height of current text style. The line height is specified as multiple of font size.
-void nvgTextLineHeight(NVGcontext* ctx, float lineHeight);
-
-// Sets the text align of current text style, see NVGalign for options.
-void nvgTextAlign(NVGcontext* ctx, int align);
-
-// Sets the font face based on specified id of current text style.
-void nvgFontFaceId(NVGcontext* ctx, int font);
-
-// Sets the font face based on specified name of current text style.
-void nvgFontFace(NVGcontext* ctx, const char* font);
-
-// Draws text string at specified location. If end is specified only the sub-string up to the end is drawn.
-float nvgText(NVGcontext* ctx, float x, float y, const char* string, const char* end);
-
-// Draws multi-line text string at specified location wrapped at the specified width. If end is specified only the sub-string up to the end is drawn.
-// White space is stripped at the beginning of the rows, the text is split at word boundaries or when new-line characters are encountered.
-// Words longer than the max width are slit at nearest character (i.e. no hyphenation).
-void nvgTextBox(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end);
-
-// Measures the specified text string. Parameter bounds should be a pointer to float[4],
-// if the bounding box of the text should be returned. The bounds value are [xmin,ymin, xmax,ymax]
-// Returns the horizontal advance of the measured text (i.e. where the next character should drawn).
-// Measured values are returned in local coordinate space.
-float nvgTextBounds(NVGcontext* ctx, float x, float y, const char* string, const char* end, float* bounds);
-
-// Measures the specified multi-text string. Parameter bounds should be a pointer to float[4],
-// if the bounding box of the text should be returned. The bounds value are [xmin,ymin, xmax,ymax]
-// Measured values are returned in local coordinate space.
-void nvgTextBoxBounds(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end, float* bounds);
-
-// Calculates the glyph x positions of the specified text. If end is specified only the sub-string will be used.
-// Measured values are returned in local coordinate space.
-int nvgTextGlyphPositions(NVGcontext* ctx, float x, float y, const char* string, const char* end, NVGglyphPosition* positions, int maxPositions);
-
-// Returns the vertical metrics based on the current text style.
-// Measured values are returned in local coordinate space.
-void nvgTextMetrics(NVGcontext* ctx, float* ascender, float* descender, float* lineh);
-
-// Breaks the specified text into lines. If end is specified only the sub-string will be used.
-// White space is stripped at the beginning of the rows, the text is split at word boundaries or when new-line characters are encountered.
-// Words longer than the max width are slit at nearest character (i.e. no hyphenation).
-int nvgTextBreakLines(NVGcontext* ctx, const char* string, const char* end, float breakRowWidth, NVGtextRow* rows, int maxRows);
-
-//
-// Internal Render API
-//
-enum NVGtexture {
- NVG_TEXTURE_ALPHA = 0x01,
- NVG_TEXTURE_RGBA = 0x02,
-};
-
-struct NVGscissor {
- float xform[6];
- float extent[2];
-};
-typedef struct NVGscissor NVGscissor;
-
-struct NVGvertex {
- float x,y,u,v;
-};
-typedef struct NVGvertex NVGvertex;
-
-struct NVGpath {
- int first;
- int count;
- unsigned char closed;
- int nbevel;
- NVGvertex* fill;
- int nfill;
- NVGvertex* stroke;
- int nstroke;
- int winding;
- int convex;
-};
-typedef struct NVGpath NVGpath;
-
-struct NVGparams {
- void* userPtr;
- int edgeAntiAlias;
- int (*renderCreate)(void* uptr);
- int (*renderCreateTexture)(void* uptr, int type, int w, int h, int imageFlags, const unsigned char* data);
- int (*renderDeleteTexture)(void* uptr, int image);
- int (*renderUpdateTexture)(void* uptr, int image, int x, int y, int w, int h, const unsigned char* data);
- int (*renderGetTextureSize)(void* uptr, int image, int* w, int* h);
- void (*renderViewport)(void* uptr, int width, int height);
- void (*renderCancel)(void* uptr);
- void (*renderFlush)(void* uptr);
- void (*renderFill)(void* uptr, NVGpaint* paint, NVGscissor* scissor, float fringe, const float* bounds, const NVGpath* paths, int npaths);
- void (*renderStroke)(void* uptr, NVGpaint* paint, NVGscissor* scissor, float fringe, float strokeWidth, const NVGpath* paths, int npaths);
- void (*renderTriangles)(void* uptr, NVGpaint* paint, NVGscissor* scissor, const NVGvertex* verts, int nverts);
- void (*renderDelete)(void* uptr);
-};
-typedef struct NVGparams NVGparams;
-
-// Constructor and destructor, called by the render back-end.
-NVGcontext* nvgCreateInternal(NVGparams* params);
-void nvgDeleteInternal(NVGcontext* ctx);
-
-NVGparams* nvgInternalParams(NVGcontext* ctx);
-
-// Debug function to dump cached path data.
-void nvgDebugDumpPathCache(NVGcontext* ctx);
-
-#ifdef _MSC_VER
-#pragma warning(pop)
-#endif
-
-#define NVG_NOTUSED(v) for (;;) { (void)(1 ? (void)0 : ( (void)(v) ) ); break; }
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif // NANOVG_H
diff --git a/dgl/src/nanovg2/nanovg_gl.h b/dgl/src/nanovg2/nanovg_gl.h
@@ -1,1525 +0,0 @@
-//
-// Copyright (c) 2009-2013 Mikko Mononen memon@inside.org
-//
-// This software is provided 'as-is', without any express or implied
-// warranty. In no event will the authors be held liable for any damages
-// arising from the use of this software.
-// Permission is granted to anyone to use this software for any purpose,
-// including commercial applications, and to alter it and redistribute it
-// freely, subject to the following restrictions:
-// 1. The origin of this software must not be misrepresented; you must not
-// claim that you wrote the original software. If you use this software
-// in a product, an acknowledgment in the product documentation would be
-// appreciated but is not required.
-// 2. Altered source versions must be plainly marked as such, and must not be
-// misrepresented as being the original software.
-// 3. This notice may not be removed or altered from any source distribution.
-//
-#ifndef NANOVG_GL_H
-#define NANOVG_GL_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// Create flags
-
-enum NVGcreateFlags {
- // Flag indicating if geometry based anti-aliasing is used (may not be needed when using MSAA).
- NVG_ANTIALIAS = 1<<0,
- // Flag indicating if strokes should be drawn using stencil buffer. The rendering will be a little
- // slower, but path overlaps (i.e. self-intersecting or sharp turns) will be drawn just once.
- NVG_STENCIL_STROKES = 1<<1,
- // Flag indicating that additional debug checks are done.
- NVG_DEBUG = 1<<2,
-};
-
-#if defined NANOVG_GL2_IMPLEMENTATION
-# define NANOVG_GL2 1
-# define NANOVG_GL_IMPLEMENTATION 1
-#elif defined NANOVG_GL3_IMPLEMENTATION
-# define NANOVG_GL3 1
-# define NANOVG_GL_IMPLEMENTATION 1
-# define NANOVG_GL_USE_UNIFORMBUFFER 1
-#elif defined NANOVG_GLES2_IMPLEMENTATION
-# define NANOVG_GLES2 1
-# define NANOVG_GL_IMPLEMENTATION 1
-#elif defined NANOVG_GLES3_IMPLEMENTATION
-# define NANOVG_GLES3 1
-# define NANOVG_GL_IMPLEMENTATION 1
-#endif
-
-#define NANOVG_GL_USE_STATE_FILTER (1)
-
-// Creates NanoVG contexts for different OpenGL (ES) versions.
-// Flags should be combination of the create flags above.
-
-#if defined NANOVG_GL2
-
-NVGcontext* nvgCreateGL2(int flags);
-void nvgDeleteGL2(NVGcontext* ctx);
-
-#endif
-
-#if defined NANOVG_GL3
-
-NVGcontext* nvgCreateGL3(int flags);
-void nvgDeleteGL3(NVGcontext* ctx);
-
-#endif
-
-#if defined NANOVG_GLES2
-
-NVGcontext* nvgCreateGLES2(int flags);
-void nvgDeleteGLES2(NVGcontext* ctx);
-
-#endif
-
-#if defined NANOVG_GLES3
-
-NVGcontext* nvgCreateGLES3(int flags);
-void nvgDeleteGLES3(NVGcontext* ctx);
-
-#endif
-
-// These are additional flags on top of NVGimageFlags.
-enum NVGimageFlagsGL {
- NVG_IMAGE_NODELETE = 1<<16, // Do not delete GL texture handle.
-};
-
-int nvglCreateImageFromHandle(NVGcontext* ctx, GLuint textureId, int w, int h, int flags);
-GLuint nvglImageHandle(NVGcontext* ctx, int image);
-
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* NANOVG_GL_H */
-
-#ifdef NANOVG_GL_IMPLEMENTATION
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <math.h>
-#include "nanovg.h"
-
-enum GLNVGuniformLoc {
- GLNVG_LOC_VIEWSIZE,
- GLNVG_LOC_TEX,
- GLNVG_LOC_FRAG,
- GLNVG_MAX_LOCS
-};
-
-enum GLNVGshaderType {
- NSVG_SHADER_FILLGRAD,
- NSVG_SHADER_FILLIMG,
- NSVG_SHADER_SIMPLE,
- NSVG_SHADER_IMG
-};
-
-#if NANOVG_GL_USE_UNIFORMBUFFER
-enum GLNVGuniformBindings {
- GLNVG_FRAG_BINDING = 0,
-};
-#endif
-
-struct GLNVGshader {
- GLuint prog;
- GLuint frag;
- GLuint vert;
- GLint loc[GLNVG_MAX_LOCS];
-};
-typedef struct GLNVGshader GLNVGshader;
-
-struct GLNVGtexture {
- int id;
- GLuint tex;
- int width, height;
- int type;
- int flags;
-};
-typedef struct GLNVGtexture GLNVGtexture;
-
-enum GLNVGcallType {
- GLNVG_NONE = 0,
- GLNVG_FILL,
- GLNVG_CONVEXFILL,
- GLNVG_STROKE,
- GLNVG_TRIANGLES,
-};
-
-struct GLNVGcall {
- int type;
- int image;
- int pathOffset;
- int pathCount;
- int triangleOffset;
- int triangleCount;
- int uniformOffset;
-};
-typedef struct GLNVGcall GLNVGcall;
-
-struct GLNVGpath {
- int fillOffset;
- int fillCount;
- int strokeOffset;
- int strokeCount;
-};
-typedef struct GLNVGpath GLNVGpath;
-
-struct GLNVGfragUniforms {
- #if NANOVG_GL_USE_UNIFORMBUFFER
- float scissorMat[12]; // matrices are actually 3 vec4s
- float paintMat[12];
- struct NVGcolor innerCol;
- struct NVGcolor outerCol;
- float scissorExt[2];
- float scissorScale[2];
- float extent[2];
- float radius;
- float feather;
- float strokeMult;
- float strokeThr;
- int texType;
- int type;
- #else
- // note: after modifying layout or size of uniform array,
- // don't forget to also update the fragment shader source!
- #define NANOVG_GL_UNIFORMARRAY_SIZE 11
- union {
- struct {
- float scissorMat[12]; // matrices are actually 3 vec4s
- float paintMat[12];
- struct NVGcolor innerCol;
- struct NVGcolor outerCol;
- float scissorExt[2];
- float scissorScale[2];
- float extent[2];
- float radius;
- float feather;
- float strokeMult;
- float strokeThr;
- float texType;
- float type;
- };
- float uniformArray[NANOVG_GL_UNIFORMARRAY_SIZE][4];
- };
- #endif
-};
-typedef struct GLNVGfragUniforms GLNVGfragUniforms;
-
-struct GLNVGcontext {
- GLNVGshader shader;
- GLNVGtexture* textures;
- float view[2];
- int ntextures;
- int ctextures;
- int textureId;
- GLuint vertBuf;
-#if defined NANOVG_GL3
- GLuint vertArr;
-#endif
-#if NANOVG_GL_USE_UNIFORMBUFFER
- GLuint fragBuf;
-#endif
- int fragSize;
- int flags;
-
- // Per frame buffers
- GLNVGcall* calls;
- int ccalls;
- int ncalls;
- GLNVGpath* paths;
- int cpaths;
- int npaths;
- struct NVGvertex* verts;
- int cverts;
- int nverts;
- unsigned char* uniforms;
- int cuniforms;
- int nuniforms;
-
- // cached state
- #if NANOVG_GL_USE_STATE_FILTER
- GLuint boundTexture;
- GLuint stencilMask;
- GLenum stencilFunc;
- GLint stencilFuncRef;
- GLuint stencilFuncMask;
- #endif
-};
-typedef struct GLNVGcontext GLNVGcontext;
-
-static int glnvg__maxi(int a, int b) { return a > b ? a : b; }
-
-#ifdef NANOVG_GLES2
-static unsigned int glnvg__nearestPow2(unsigned int num)
-{
- unsigned n = num > 0 ? num - 1 : 0;
- n |= n >> 1;
- n |= n >> 2;
- n |= n >> 4;
- n |= n >> 8;
- n |= n >> 16;
- n++;
- return n;
-}
-#endif
-
-static void glnvg__bindTexture(GLNVGcontext* gl, GLuint tex)
-{
-#if NANOVG_GL_USE_STATE_FILTER
- if (gl->boundTexture != tex) {
- gl->boundTexture = tex;
- glBindTexture(GL_TEXTURE_2D, tex);
- }
-#else
- glBindTexture(GL_TEXTURE_2D, tex);
-#endif
-}
-
-static void glnvg__stencilMask(GLNVGcontext* gl, GLuint mask)
-{
-#if NANOVG_GL_USE_STATE_FILTER
- if (gl->stencilMask != mask) {
- gl->stencilMask = mask;
- glStencilMask(mask);
- }
-#else
- glStencilMask(mask);
-#endif
-}
-
-static void glnvg__stencilFunc(GLNVGcontext* gl, GLenum func, GLint ref, GLuint mask)
-{
-#if NANOVG_GL_USE_STATE_FILTER
- if ((gl->stencilFunc != func) ||
- (gl->stencilFuncRef != ref) ||
- (gl->stencilFuncMask != mask)) {
-
- gl->stencilFunc = func;
- gl->stencilFuncRef = ref;
- gl->stencilFuncMask = mask;
- glStencilFunc(func, ref, mask);
- }
-#else
- glStencilFunc(func, ref, mask);
-#endif
-}
-
-static GLNVGtexture* glnvg__allocTexture(GLNVGcontext* gl)
-{
- GLNVGtexture* tex = NULL;
- int i;
-
- for (i = 0; i < gl->ntextures; i++) {
- if (gl->textures[i].id == 0) {
- tex = &gl->textures[i];
- break;
- }
- }
- if (tex == NULL) {
- if (gl->ntextures+1 > gl->ctextures) {
- GLNVGtexture* textures;
- int ctextures = glnvg__maxi(gl->ntextures+1, 4) + gl->ctextures/2; // 1.5x Overallocate
- textures = (GLNVGtexture*)realloc(gl->textures, sizeof(GLNVGtexture)*ctextures);
- if (textures == NULL) return NULL;
- gl->textures = textures;
- gl->ctextures = ctextures;
- }
- tex = &gl->textures[gl->ntextures++];
- }
-
- memset(tex, 0, sizeof(*tex));
- tex->id = ++gl->textureId;
-
- return tex;
-}
-
-static GLNVGtexture* glnvg__findTexture(GLNVGcontext* gl, int id)
-{
- int i;
- for (i = 0; i < gl->ntextures; i++)
- if (gl->textures[i].id == id)
- return &gl->textures[i];
- return NULL;
-}
-
-static int glnvg__deleteTexture(GLNVGcontext* gl, int id)
-{
- int i;
- for (i = 0; i < gl->ntextures; i++) {
- if (gl->textures[i].id == id) {
- if (gl->textures[i].tex != 0 && (gl->textures[i].flags & NVG_IMAGE_NODELETE) == 0)
- glDeleteTextures(1, &gl->textures[i].tex);
- memset(&gl->textures[i], 0, sizeof(gl->textures[i]));
- return 1;
- }
- }
- return 0;
-}
-
-static void glnvg__dumpShaderError(GLuint shader, const char* name, const char* type)
-{
- char str[512+1];
- int len = 0;
- glGetShaderInfoLog(shader, 512, &len, str);
- if (len > 512) len = 512;
- str[len] = '\0';
- printf("Shader %s/%s error:\n%s\n", name, type, str);
-}
-
-static void glnvg__dumpProgramError(GLuint prog, const char* name)
-{
- char str[512+1];
- int len = 0;
- glGetProgramInfoLog(prog, 512, &len, str);
- if (len > 512) len = 512;
- str[len] = '\0';
- printf("Program %s error:\n%s\n", name, str);
-}
-
-static void glnvg__checkError(GLNVGcontext* gl, const char* str)
-{
- GLenum err;
- if ((gl->flags & NVG_DEBUG) == 0) return;
- err = glGetError();
- if (err != GL_NO_ERROR) {
- printf("Error %08x after %s\n", err, str);
- return;
- }
-}
-
-static int glnvg__createShader(GLNVGshader* shader, const char* name, const char* header, const char* opts, const char* vshader, const char* fshader)
-{
- GLint status;
- GLuint prog, vert, frag;
- const char* str[3];
- str[0] = header;
- str[1] = opts != NULL ? opts : "";
-
- memset(shader, 0, sizeof(*shader));
-
- prog = glCreateProgram();
- vert = glCreateShader(GL_VERTEX_SHADER);
- frag = glCreateShader(GL_FRAGMENT_SHADER);
- str[2] = vshader;
- glShaderSource(vert, 3, str, 0);
- str[2] = fshader;
- glShaderSource(frag, 3, str, 0);
-
- glCompileShader(vert);
- glGetShaderiv(vert, GL_COMPILE_STATUS, &status);
- if (status != GL_TRUE) {
- glnvg__dumpShaderError(vert, name, "vert");
- return 0;
- }
-
- glCompileShader(frag);
- glGetShaderiv(frag, GL_COMPILE_STATUS, &status);
- if (status != GL_TRUE) {
- glnvg__dumpShaderError(frag, name, "frag");
- return 0;
- }
-
- glAttachShader(prog, vert);
- glAttachShader(prog, frag);
-
- glBindAttribLocation(prog, 0, "vertex");
- glBindAttribLocation(prog, 1, "tcoord");
-
- glLinkProgram(prog);
- glGetProgramiv(prog, GL_LINK_STATUS, &status);
- if (status != GL_TRUE) {
- glnvg__dumpProgramError(prog, name);
- return 0;
- }
-
- shader->prog = prog;
- shader->vert = vert;
- shader->frag = frag;
-
- return 1;
-}
-
-static void glnvg__deleteShader(GLNVGshader* shader)
-{
- if (shader->prog != 0)
- glDeleteProgram(shader->prog);
- if (shader->vert != 0)
- glDeleteShader(shader->vert);
- if (shader->frag != 0)
- glDeleteShader(shader->frag);
-}
-
-static void glnvg__getUniforms(GLNVGshader* shader)
-{
- shader->loc[GLNVG_LOC_VIEWSIZE] = glGetUniformLocation(shader->prog, "viewSize");
- shader->loc[GLNVG_LOC_TEX] = glGetUniformLocation(shader->prog, "tex");
-
-#if NANOVG_GL_USE_UNIFORMBUFFER
- shader->loc[GLNVG_LOC_FRAG] = glGetUniformBlockIndex(shader->prog, "frag");
-#else
- shader->loc[GLNVG_LOC_FRAG] = glGetUniformLocation(shader->prog, "frag");
-#endif
-}
-
-static int glnvg__renderCreate(void* uptr)
-{
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- int align = 4;
-
- // TODO: mediump float may not be enough for GLES2 in iOS.
- // see the following discussion: https://github.com/memononen/nanovg/issues/46
- static const char* shaderHeader =
-#if defined NANOVG_GL2
- "#define NANOVG_GL2 1\n"
-#elif defined NANOVG_GL3
- "#version 150 core\n"
- "#define NANOVG_GL3 1\n"
-#elif defined NANOVG_GLES2
- "#version 100\n"
- "#define NANOVG_GL2 1\n"
-#elif defined NANOVG_GLES3
- "#version 300 es\n"
- "#define NANOVG_GL3 1\n"
-#endif
-
-#if NANOVG_GL_USE_UNIFORMBUFFER
- "#define USE_UNIFORMBUFFER 1\n"
-#else
- "#define UNIFORMARRAY_SIZE 11\n"
-#endif
- "\n";
-
- static const char* fillVertShader =
- "#ifdef NANOVG_GL3\n"
- " uniform vec2 viewSize;\n"
- " in vec2 vertex;\n"
- " in vec2 tcoord;\n"
- " out vec2 ftcoord;\n"
- " out vec2 fpos;\n"
- "#else\n"
- " uniform vec2 viewSize;\n"
- " attribute vec2 vertex;\n"
- " attribute vec2 tcoord;\n"
- " varying vec2 ftcoord;\n"
- " varying vec2 fpos;\n"
- "#endif\n"
- "void main(void) {\n"
- " ftcoord = tcoord;\n"
- " fpos = vertex;\n"
- " gl_Position = vec4(2.0*vertex.x/viewSize.x - 1.0, 1.0 - 2.0*vertex.y/viewSize.y, 0, 1);\n"
- "}\n";
-
- static const char* fillFragShader =
- "#ifdef GL_ES\n"
- "#if defined(GL_FRAGMENT_PRECISION_HIGH) || defined(NANOVG_GL3)\n"
- " precision highp float;\n"
- "#else\n"
- " precision mediump float;\n"
- "#endif\n"
- "#endif\n"
- "#ifdef NANOVG_GL3\n"
- "#ifdef USE_UNIFORMBUFFER\n"
- " layout(std140) uniform frag {\n"
- " mat3 scissorMat;\n"
- " mat3 paintMat;\n"
- " vec4 innerCol;\n"
- " vec4 outerCol;\n"
- " vec2 scissorExt;\n"
- " vec2 scissorScale;\n"
- " vec2 extent;\n"
- " float radius;\n"
- " float feather;\n"
- " float strokeMult;\n"
- " float strokeThr;\n"
- " int texType;\n"
- " int type;\n"
- " };\n"
- "#else\n" // NANOVG_GL3 && !USE_UNIFORMBUFFER
- " uniform vec4 frag[UNIFORMARRAY_SIZE];\n"
- "#endif\n"
- " uniform sampler2D tex;\n"
- " in vec2 ftcoord;\n"
- " in vec2 fpos;\n"
- " out vec4 outColor;\n"
- "#else\n" // !NANOVG_GL3
- " uniform vec4 frag[UNIFORMARRAY_SIZE];\n"
- " uniform sampler2D tex;\n"
- " varying vec2 ftcoord;\n"
- " varying vec2 fpos;\n"
- "#endif\n"
- "#ifndef USE_UNIFORMBUFFER\n"
- " #define scissorMat mat3(frag[0].xyz, frag[1].xyz, frag[2].xyz)\n"
- " #define paintMat mat3(frag[3].xyz, frag[4].xyz, frag[5].xyz)\n"
- " #define innerCol frag[6]\n"
- " #define outerCol frag[7]\n"
- " #define scissorExt frag[8].xy\n"
- " #define scissorScale frag[8].zw\n"
- " #define extent frag[9].xy\n"
- " #define radius frag[9].z\n"
- " #define feather frag[9].w\n"
- " #define strokeMult frag[10].x\n"
- " #define strokeThr frag[10].y\n"
- " #define texType int(frag[10].z)\n"
- " #define type int(frag[10].w)\n"
- "#endif\n"
- "\n"
- "float sdroundrect(vec2 pt, vec2 ext, float rad) {\n"
- " vec2 ext2 = ext - vec2(rad,rad);\n"
- " vec2 d = abs(pt) - ext2;\n"
- " return min(max(d.x,d.y),0.0) + length(max(d,0.0)) - rad;\n"
- "}\n"
- "\n"
- "// Scissoring\n"
- "float scissorMask(vec2 p) {\n"
- " vec2 sc = (abs((scissorMat * vec3(p,1.0)).xy) - scissorExt);\n"
- " sc = vec2(0.5,0.5) - sc * scissorScale;\n"
- " return clamp(sc.x,0.0,1.0) * clamp(sc.y,0.0,1.0);\n"
- "}\n"
- "#ifdef EDGE_AA\n"
- "// Stroke - from [0..1] to clipped pyramid, where the slope is 1px.\n"
- "float strokeMask() {\n"
- " return min(1.0, (1.0-abs(ftcoord.x*2.0-1.0))*strokeMult) * min(1.0, ftcoord.y);\n"
- "}\n"
- "#endif\n"
- "\n"
- "void main(void) {\n"
- " vec4 result;\n"
- " float scissor = scissorMask(fpos);\n"
- "#ifdef EDGE_AA\n"
- " float strokeAlpha = strokeMask();\n"
- "#else\n"
- " float strokeAlpha = 1.0;\n"
- "#endif\n"
- " if (type == 0) { // Gradient\n"
- " // Calculate gradient color using box gradient\n"
- " vec2 pt = (paintMat * vec3(fpos,1.0)).xy;\n"
- " float d = clamp((sdroundrect(pt, extent, radius) + feather*0.5) / feather, 0.0, 1.0);\n"
- " vec4 color = mix(innerCol,outerCol,d);\n"
- " // Combine alpha\n"
- " color *= strokeAlpha * scissor;\n"
- " result = color;\n"
- " } else if (type == 1) { // Image\n"
- " // Calculate color fron texture\n"
- " vec2 pt = (paintMat * vec3(fpos,1.0)).xy / extent;\n"
- "#ifdef NANOVG_GL3\n"
- " vec4 color = texture(tex, pt);\n"
- "#else\n"
- " vec4 color = texture2D(tex, pt);\n"
- "#endif\n"
- " if (texType == 1) color = vec4(color.xyz*color.w,color.w);"
- " if (texType == 2) color = vec4(color.x);"
- " // Apply color tint and alpha.\n"
- " color *= innerCol;\n"
- " // Combine alpha\n"
- " color *= strokeAlpha * scissor;\n"
- " result = color;\n"
- " } else if (type == 2) { // Stencil fill\n"
- " result = vec4(1,1,1,1);\n"
- " } else if (type == 3) { // Textured tris\n"
- "#ifdef NANOVG_GL3\n"
- " vec4 color = texture(tex, ftcoord);\n"
- "#else\n"
- " vec4 color = texture2D(tex, ftcoord);\n"
- "#endif\n"
- " if (texType == 1) color = vec4(color.xyz*color.w,color.w);"
- " if (texType == 2) color = vec4(color.x);"
- " color *= scissor;\n"
- " result = color * innerCol;\n"
- " }\n"
- "#ifdef EDGE_AA\n"
- " if (strokeAlpha < strokeThr) discard;\n"
- "#endif\n"
- "#ifdef NANOVG_GL3\n"
- " outColor = result;\n"
- "#else\n"
- " gl_FragColor = result;\n"
- "#endif\n"
- "}\n";
-
- glnvg__checkError(gl, "init");
-
- if (gl->flags & NVG_ANTIALIAS) {
- if (glnvg__createShader(&gl->shader, "shader", shaderHeader, "#define EDGE_AA 1\n", fillVertShader, fillFragShader) == 0)
- return 0;
- } else {
- if (glnvg__createShader(&gl->shader, "shader", shaderHeader, NULL, fillVertShader, fillFragShader) == 0)
- return 0;
- }
-
- glnvg__checkError(gl, "uniform locations");
- glnvg__getUniforms(&gl->shader);
-
- // Create dynamic vertex array
-#if defined NANOVG_GL3
- glGenVertexArrays(1, &gl->vertArr);
-#endif
- glGenBuffers(1, &gl->vertBuf);
-
-#if NANOVG_GL_USE_UNIFORMBUFFER
- // Create UBOs
- glUniformBlockBinding(gl->shader.prog, gl->shader.loc[GLNVG_LOC_FRAG], GLNVG_FRAG_BINDING);
- glGenBuffers(1, &gl->fragBuf);
- glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &align);
-#endif
- gl->fragSize = sizeof(GLNVGfragUniforms) + align - sizeof(GLNVGfragUniforms) % align;
-
- glnvg__checkError(gl, "create done");
-
- glFinish();
-
- return 1;
-}
-
-static int glnvg__renderCreateTexture(void* uptr, int type, int w, int h, int imageFlags, const unsigned char* data)
-{
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- GLNVGtexture* tex = glnvg__allocTexture(gl);
-
- if (tex == NULL) return 0;
-
-#ifdef NANOVG_GLES2
- // Check for non-power of 2.
- if (glnvg__nearestPow2(w) != (unsigned int)w || glnvg__nearestPow2(h) != (unsigned int)h) {
- // No repeat
- if ((imageFlags & NVG_IMAGE_REPEATX) != 0 || (imageFlags & NVG_IMAGE_REPEATY) != 0) {
- printf("Repeat X/Y is not supported for non power-of-two textures (%d x %d)\n", w, h);
- imageFlags &= ~(NVG_IMAGE_REPEATX | NVG_IMAGE_REPEATY);
- }
- // No mips.
- if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) {
- printf("Mip-maps is not support for non power-of-two textures (%d x %d)\n", w, h);
- imageFlags &= ~NVG_IMAGE_GENERATE_MIPMAPS;
- }
- }
-#endif
-
- glGenTextures(1, &tex->tex);
- tex->width = w;
- tex->height = h;
- tex->type = type;
- tex->flags = imageFlags;
- glnvg__bindTexture(gl, tex->tex);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT,1);
-#ifndef NANOVG_GLES2
- glPixelStorei(GL_UNPACK_ROW_LENGTH, tex->width);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
-#endif
-
-#if defined (NANOVG_GL2)
- // GL 1.4 and later has support for generating mipmaps using a tex parameter.
- if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) {
- glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
- }
-#endif
-
- if (type == NVG_TEXTURE_RGBA)
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
- else
-#if defined(NANOVG_GLES2)
- glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, w, h, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, data);
-#elif defined(NANOVG_GLES3)
- glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, w, h, 0, GL_RED, GL_UNSIGNED_BYTE, data);
-#else
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, w, h, 0, GL_RED, GL_UNSIGNED_BYTE, data);
-#endif
-
- if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) {
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
- } else {
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- }
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- if (imageFlags & NVG_IMAGE_REPEATX)
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
- else
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-
- if (imageFlags & NVG_IMAGE_REPEATY)
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
- else
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
-#ifndef NANOVG_GLES2
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
-#endif
-
- // The new way to build mipmaps on GLES and GL3
-#if !defined(NANOVG_GL2)
- if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) {
- glGenerateMipmap(GL_TEXTURE_2D);
- }
-#endif
-
- glnvg__checkError(gl, "create tex");
- glnvg__bindTexture(gl, 0);
-
- return tex->id;
-}
-
-
-static int glnvg__renderDeleteTexture(void* uptr, int image)
-{
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- return glnvg__deleteTexture(gl, image);
-}
-
-static int glnvg__renderUpdateTexture(void* uptr, int image, int x, int y, int w, int h, const unsigned char* data)
-{
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- GLNVGtexture* tex = glnvg__findTexture(gl, image);
-
- if (tex == NULL) return 0;
- glnvg__bindTexture(gl, tex->tex);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT,1);
-
-#ifndef NANOVG_GLES2
- glPixelStorei(GL_UNPACK_ROW_LENGTH, tex->width);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, x);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, y);
-#else
- // No support for all of skip, need to update a whole row at a time.
- if (tex->type == NVG_TEXTURE_RGBA)
- data += y*tex->width*4;
- else
- data += y*tex->width;
- x = 0;
- w = tex->width;
-#endif
-
- if (tex->type == NVG_TEXTURE_RGBA)
- glTexSubImage2D(GL_TEXTURE_2D, 0, x,y, w,h, GL_RGBA, GL_UNSIGNED_BYTE, data);
- else
-#ifdef NANOVG_GLES2
- glTexSubImage2D(GL_TEXTURE_2D, 0, x,y, w,h, GL_LUMINANCE, GL_UNSIGNED_BYTE, data);
-#else
- glTexSubImage2D(GL_TEXTURE_2D, 0, x,y, w,h, GL_RED, GL_UNSIGNED_BYTE, data);
-#endif
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
-#ifndef NANOVG_GLES2
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
- glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
-#endif
-
- glnvg__bindTexture(gl, 0);
-
- return 1;
-}
-
-static int glnvg__renderGetTextureSize(void* uptr, int image, int* w, int* h)
-{
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- GLNVGtexture* tex = glnvg__findTexture(gl, image);
- if (tex == NULL) return 0;
- *w = tex->width;
- *h = tex->height;
- return 1;
-}
-
-static void glnvg__xformToMat3x4(float* m3, float* t)
-{
- m3[0] = t[0];
- m3[1] = t[1];
- m3[2] = 0.0f;
- m3[3] = 0.0f;
- m3[4] = t[2];
- m3[5] = t[3];
- m3[6] = 0.0f;
- m3[7] = 0.0f;
- m3[8] = t[4];
- m3[9] = t[5];
- m3[10] = 1.0f;
- m3[11] = 0.0f;
-}
-
-static NVGcolor glnvg__premulColor(NVGcolor c)
-{
- c.r *= c.a;
- c.g *= c.a;
- c.b *= c.a;
- return c;
-}
-
-static int glnvg__convertPaint(GLNVGcontext* gl, GLNVGfragUniforms* frag, NVGpaint* paint,
- NVGscissor* scissor, float width, float fringe, float strokeThr)
-{
- GLNVGtexture* tex = NULL;
- float invxform[6];
-
- memset(frag, 0, sizeof(*frag));
-
- frag->innerCol = glnvg__premulColor(paint->innerColor);
- frag->outerCol = glnvg__premulColor(paint->outerColor);
-
- if (scissor->extent[0] < -0.5f || scissor->extent[1] < -0.5f) {
- memset(frag->scissorMat, 0, sizeof(frag->scissorMat));
- frag->scissorExt[0] = 1.0f;
- frag->scissorExt[1] = 1.0f;
- frag->scissorScale[0] = 1.0f;
- frag->scissorScale[1] = 1.0f;
- } else {
- nvgTransformInverse(invxform, scissor->xform);
- glnvg__xformToMat3x4(frag->scissorMat, invxform);
- frag->scissorExt[0] = scissor->extent[0];
- frag->scissorExt[1] = scissor->extent[1];
- frag->scissorScale[0] = sqrtf(scissor->xform[0]*scissor->xform[0] + scissor->xform[2]*scissor->xform[2]) / fringe;
- frag->scissorScale[1] = sqrtf(scissor->xform[1]*scissor->xform[1] + scissor->xform[3]*scissor->xform[3]) / fringe;
- }
-
- memcpy(frag->extent, paint->extent, sizeof(frag->extent));
- frag->strokeMult = (width*0.5f + fringe*0.5f) / fringe;
- frag->strokeThr = strokeThr;
-
- if (paint->image != 0) {
- tex = glnvg__findTexture(gl, paint->image);
- if (tex == NULL) return 0;
- if ((tex->flags & NVG_IMAGE_FLIPY) != 0) {
- float flipped[6];
- nvgTransformScale(flipped, 1.0f, -1.0f);
- nvgTransformMultiply(flipped, paint->xform);
- nvgTransformInverse(invxform, flipped);
- } else {
- nvgTransformInverse(invxform, paint->xform);
- }
- frag->type = NSVG_SHADER_FILLIMG;
-
- if (tex->type == NVG_TEXTURE_RGBA)
- frag->texType = (tex->flags & NVG_IMAGE_PREMULTIPLIED) ? 0 : 1;
- else
- frag->texType = 2;
-// printf("frag->texType = %d\n", frag->texType);
- } else {
- frag->type = NSVG_SHADER_FILLGRAD;
- frag->radius = paint->radius;
- frag->feather = paint->feather;
- nvgTransformInverse(invxform, paint->xform);
- }
-
- glnvg__xformToMat3x4(frag->paintMat, invxform);
-
- return 1;
-}
-
-static GLNVGfragUniforms* nvg__fragUniformPtr(GLNVGcontext* gl, int i);
-
-static void glnvg__setUniforms(GLNVGcontext* gl, int uniformOffset, int image)
-{
-#if NANOVG_GL_USE_UNIFORMBUFFER
- glBindBufferRange(GL_UNIFORM_BUFFER, GLNVG_FRAG_BINDING, gl->fragBuf, uniformOffset, sizeof(GLNVGfragUniforms));
-#else
- GLNVGfragUniforms* frag = nvg__fragUniformPtr(gl, uniformOffset);
- glUniform4fv(gl->shader.loc[GLNVG_LOC_FRAG], NANOVG_GL_UNIFORMARRAY_SIZE, &(frag->uniformArray[0][0]));
-#endif
-
- if (image != 0) {
- GLNVGtexture* tex = glnvg__findTexture(gl, image);
- glnvg__bindTexture(gl, tex != NULL ? tex->tex : 0);
- glnvg__checkError(gl, "tex paint tex");
- } else {
- glnvg__bindTexture(gl, 0);
- }
-}
-
-static void glnvg__renderViewport(void* uptr, int width, int height)
-{
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- gl->view[0] = (float)width;
- gl->view[1] = (float)height;
-}
-
-static void glnvg__fill(GLNVGcontext* gl, GLNVGcall* call)
-{
- GLNVGpath* paths = &gl->paths[call->pathOffset];
- int i, npaths = call->pathCount;
-
- // Draw shapes
- glEnable(GL_STENCIL_TEST);
- glnvg__stencilMask(gl, 0xff);
- glnvg__stencilFunc(gl, GL_ALWAYS, 0, 0xff);
- glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
-
- // set bindpoint for solid loc
- glnvg__setUniforms(gl, call->uniformOffset, 0);
- glnvg__checkError(gl, "fill simple");
-
- glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, GL_INCR_WRAP);
- glStencilOpSeparate(GL_BACK, GL_KEEP, GL_KEEP, GL_DECR_WRAP);
- glDisable(GL_CULL_FACE);
- for (i = 0; i < npaths; i++)
- glDrawArrays(GL_TRIANGLE_FAN, paths[i].fillOffset, paths[i].fillCount);
- glEnable(GL_CULL_FACE);
-
- // Draw anti-aliased pixels
- glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
-
- glnvg__setUniforms(gl, call->uniformOffset + gl->fragSize, call->image);
- glnvg__checkError(gl, "fill fill");
-
- if (gl->flags & NVG_ANTIALIAS) {
- glnvg__stencilFunc(gl, GL_EQUAL, 0x00, 0xff);
- glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
- // Draw fringes
- for (i = 0; i < npaths; i++)
- glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
- }
-
- // Draw fill
- glnvg__stencilFunc(gl, GL_NOTEQUAL, 0x0, 0xff);
- glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO);
- glDrawArrays(GL_TRIANGLES, call->triangleOffset, call->triangleCount);
-
- glDisable(GL_STENCIL_TEST);
-}
-
-static void glnvg__convexFill(GLNVGcontext* gl, GLNVGcall* call)
-{
- GLNVGpath* paths = &gl->paths[call->pathOffset];
- int i, npaths = call->pathCount;
-
- glnvg__setUniforms(gl, call->uniformOffset, call->image);
- glnvg__checkError(gl, "convex fill");
-
- for (i = 0; i < npaths; i++)
- glDrawArrays(GL_TRIANGLE_FAN, paths[i].fillOffset, paths[i].fillCount);
- if (gl->flags & NVG_ANTIALIAS) {
- // Draw fringes
- for (i = 0; i < npaths; i++)
- glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
- }
-}
-
-static void glnvg__stroke(GLNVGcontext* gl, GLNVGcall* call)
-{
- GLNVGpath* paths = &gl->paths[call->pathOffset];
- int npaths = call->pathCount, i;
-
- if (gl->flags & NVG_STENCIL_STROKES) {
-
- glEnable(GL_STENCIL_TEST);
- glnvg__stencilMask(gl, 0xff);
-
- // Fill the stroke base without overlap
- glnvg__stencilFunc(gl, GL_EQUAL, 0x0, 0xff);
- glStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
- glnvg__setUniforms(gl, call->uniformOffset + gl->fragSize, call->image);
- glnvg__checkError(gl, "stroke fill 0");
- for (i = 0; i < npaths; i++)
- glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
-
- // Draw anti-aliased pixels.
- glnvg__setUniforms(gl, call->uniformOffset, call->image);
- glnvg__stencilFunc(gl, GL_EQUAL, 0x00, 0xff);
- glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
- for (i = 0; i < npaths; i++)
- glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
-
- // Clear stencil buffer.
- glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
- glnvg__stencilFunc(gl, GL_ALWAYS, 0x0, 0xff);
- glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO);
- glnvg__checkError(gl, "stroke fill 1");
- for (i = 0; i < npaths; i++)
- glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
- glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
-
- glDisable(GL_STENCIL_TEST);
-
-// glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset + gl->fragSize), paint, scissor, strokeWidth, fringe, 1.0f - 0.5f/255.0f);
-
- } else {
- glnvg__setUniforms(gl, call->uniformOffset, call->image);
- glnvg__checkError(gl, "stroke fill");
- // Draw Strokes
- for (i = 0; i < npaths; i++)
- glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
- }
-}
-
-static void glnvg__triangles(GLNVGcontext* gl, GLNVGcall* call)
-{
- glnvg__setUniforms(gl, call->uniformOffset, call->image);
- glnvg__checkError(gl, "triangles fill");
-
- glDrawArrays(GL_TRIANGLES, call->triangleOffset, call->triangleCount);
-}
-
-static void glnvg__renderCancel(void* uptr) {
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- gl->nverts = 0;
- gl->npaths = 0;
- gl->ncalls = 0;
- gl->nuniforms = 0;
-}
-
-static void glnvg__renderFlush(void* uptr)
-{
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- int i;
-
- if (gl->ncalls > 0) {
-
- // Setup require GL state.
- glUseProgram(gl->shader.prog);
-
- glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
- glEnable(GL_CULL_FACE);
- glCullFace(GL_BACK);
- glFrontFace(GL_CCW);
- glEnable(GL_BLEND);
- glDisable(GL_DEPTH_TEST);
- glDisable(GL_SCISSOR_TEST);
- glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
- glStencilMask(0xffffffff);
- glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
- glStencilFunc(GL_ALWAYS, 0, 0xffffffff);
- glActiveTexture(GL_TEXTURE0);
- glBindTexture(GL_TEXTURE_2D, 0);
- #if NANOVG_GL_USE_STATE_FILTER
- gl->boundTexture = 0;
- gl->stencilMask = 0xffffffff;
- gl->stencilFunc = GL_ALWAYS;
- gl->stencilFuncRef = 0;
- gl->stencilFuncMask = 0xffffffff;
- #endif
-
-#if NANOVG_GL_USE_UNIFORMBUFFER
- // Upload ubo for frag shaders
- glBindBuffer(GL_UNIFORM_BUFFER, gl->fragBuf);
- glBufferData(GL_UNIFORM_BUFFER, gl->nuniforms * gl->fragSize, gl->uniforms, GL_STREAM_DRAW);
-#endif
-
- // Upload vertex data
-#if defined NANOVG_GL3
- glBindVertexArray(gl->vertArr);
-#endif
- glBindBuffer(GL_ARRAY_BUFFER, gl->vertBuf);
- glBufferData(GL_ARRAY_BUFFER, gl->nverts * sizeof(NVGvertex), gl->verts, GL_STREAM_DRAW);
- glEnableVertexAttribArray(0);
- glEnableVertexAttribArray(1);
- glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(NVGvertex), (const GLvoid*)(size_t)0);
- glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(NVGvertex), (const GLvoid*)(0 + 2*sizeof(float)));
-
- // Set view and texture just once per frame.
- glUniform1i(gl->shader.loc[GLNVG_LOC_TEX], 0);
- glUniform2fv(gl->shader.loc[GLNVG_LOC_VIEWSIZE], 1, gl->view);
-
-#if NANOVG_GL_USE_UNIFORMBUFFER
- glBindBuffer(GL_UNIFORM_BUFFER, gl->fragBuf);
-#endif
-
- for (i = 0; i < gl->ncalls; i++) {
- GLNVGcall* call = &gl->calls[i];
- if (call->type == GLNVG_FILL)
- glnvg__fill(gl, call);
- else if (call->type == GLNVG_CONVEXFILL)
- glnvg__convexFill(gl, call);
- else if (call->type == GLNVG_STROKE)
- glnvg__stroke(gl, call);
- else if (call->type == GLNVG_TRIANGLES)
- glnvg__triangles(gl, call);
- }
-
- glDisableVertexAttribArray(0);
- glDisableVertexAttribArray(1);
-#if defined NANOVG_GL3
- glBindVertexArray(0);
-#endif
- glDisable(GL_CULL_FACE);
- glBindBuffer(GL_ARRAY_BUFFER, 0);
- glUseProgram(0);
- glnvg__bindTexture(gl, 0);
- }
-
- // Reset calls
- gl->nverts = 0;
- gl->npaths = 0;
- gl->ncalls = 0;
- gl->nuniforms = 0;
-}
-
-static int glnvg__maxVertCount(const NVGpath* paths, int npaths)
-{
- int i, count = 0;
- for (i = 0; i < npaths; i++) {
- count += paths[i].nfill;
- count += paths[i].nstroke;
- }
- return count;
-}
-
-static GLNVGcall* glnvg__allocCall(GLNVGcontext* gl)
-{
- GLNVGcall* ret = NULL;
- if (gl->ncalls+1 > gl->ccalls) {
- GLNVGcall* calls;
- int ccalls = glnvg__maxi(gl->ncalls+1, 128) + gl->ccalls/2; // 1.5x Overallocate
- calls = (GLNVGcall*)realloc(gl->calls, sizeof(GLNVGcall) * ccalls);
- if (calls == NULL) return NULL;
- gl->calls = calls;
- gl->ccalls = ccalls;
- }
- ret = &gl->calls[gl->ncalls++];
- memset(ret, 0, sizeof(GLNVGcall));
- return ret;
-}
-
-static int glnvg__allocPaths(GLNVGcontext* gl, int n)
-{
- int ret = 0;
- if (gl->npaths+n > gl->cpaths) {
- GLNVGpath* paths;
- int cpaths = glnvg__maxi(gl->npaths + n, 128) + gl->cpaths/2; // 1.5x Overallocate
- paths = (GLNVGpath*)realloc(gl->paths, sizeof(GLNVGpath) * cpaths);
- if (paths == NULL) return -1;
- gl->paths = paths;
- gl->cpaths = cpaths;
- }
- ret = gl->npaths;
- gl->npaths += n;
- return ret;
-}
-
-static int glnvg__allocVerts(GLNVGcontext* gl, int n)
-{
- int ret = 0;
- if (gl->nverts+n > gl->cverts) {
- NVGvertex* verts;
- int cverts = glnvg__maxi(gl->nverts + n, 4096) + gl->cverts/2; // 1.5x Overallocate
- verts = (NVGvertex*)realloc(gl->verts, sizeof(NVGvertex) * cverts);
- if (verts == NULL) return -1;
- gl->verts = verts;
- gl->cverts = cverts;
- }
- ret = gl->nverts;
- gl->nverts += n;
- return ret;
-}
-
-static int glnvg__allocFragUniforms(GLNVGcontext* gl, int n)
-{
- int ret = 0, structSize = gl->fragSize;
- if (gl->nuniforms+n > gl->cuniforms) {
- unsigned char* uniforms;
- int cuniforms = glnvg__maxi(gl->nuniforms+n, 128) + gl->cuniforms/2; // 1.5x Overallocate
- uniforms = (unsigned char*)realloc(gl->uniforms, structSize * cuniforms);
- if (uniforms == NULL) return -1;
- gl->uniforms = uniforms;
- gl->cuniforms = cuniforms;
- }
- ret = gl->nuniforms * structSize;
- gl->nuniforms += n;
- return ret;
-}
-
-static GLNVGfragUniforms* nvg__fragUniformPtr(GLNVGcontext* gl, int i)
-{
- return (GLNVGfragUniforms*)&gl->uniforms[i];
-}
-
-static void glnvg__vset(NVGvertex* vtx, float x, float y, float u, float v)
-{
- vtx->x = x;
- vtx->y = y;
- vtx->u = u;
- vtx->v = v;
-}
-
-static void glnvg__renderFill(void* uptr, NVGpaint* paint, NVGscissor* scissor, float fringe,
- const float* bounds, const NVGpath* paths, int npaths)
-{
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- GLNVGcall* call = glnvg__allocCall(gl);
- NVGvertex* quad;
- GLNVGfragUniforms* frag;
- int i, maxverts, offset;
-
- if (call == NULL) return;
-
- call->type = GLNVG_FILL;
- call->pathOffset = glnvg__allocPaths(gl, npaths);
- if (call->pathOffset == -1) goto error;
- call->pathCount = npaths;
- call->image = paint->image;
-
- if (npaths == 1 && paths[0].convex)
- call->type = GLNVG_CONVEXFILL;
-
- // Allocate vertices for all the paths.
- maxverts = glnvg__maxVertCount(paths, npaths) + 6;
- offset = glnvg__allocVerts(gl, maxverts);
- if (offset == -1) goto error;
-
- for (i = 0; i < npaths; i++) {
- GLNVGpath* copy = &gl->paths[call->pathOffset + i];
- const NVGpath* path = &paths[i];
- memset(copy, 0, sizeof(GLNVGpath));
- if (path->nfill > 0) {
- copy->fillOffset = offset;
- copy->fillCount = path->nfill;
- memcpy(&gl->verts[offset], path->fill, sizeof(NVGvertex) * path->nfill);
- offset += path->nfill;
- }
- if (path->nstroke > 0) {
- copy->strokeOffset = offset;
- copy->strokeCount = path->nstroke;
- memcpy(&gl->verts[offset], path->stroke, sizeof(NVGvertex) * path->nstroke);
- offset += path->nstroke;
- }
- }
-
- // Quad
- call->triangleOffset = offset;
- call->triangleCount = 6;
- quad = &gl->verts[call->triangleOffset];
- glnvg__vset(&quad[0], bounds[0], bounds[3], 0.5f, 1.0f);
- glnvg__vset(&quad[1], bounds[2], bounds[3], 0.5f, 1.0f);
- glnvg__vset(&quad[2], bounds[2], bounds[1], 0.5f, 1.0f);
-
- glnvg__vset(&quad[3], bounds[0], bounds[3], 0.5f, 1.0f);
- glnvg__vset(&quad[4], bounds[2], bounds[1], 0.5f, 1.0f);
- glnvg__vset(&quad[5], bounds[0], bounds[1], 0.5f, 1.0f);
-
- // Setup uniforms for draw calls
- if (call->type == GLNVG_FILL) {
- call->uniformOffset = glnvg__allocFragUniforms(gl, 2);
- if (call->uniformOffset == -1) goto error;
- // Simple shader for stencil
- frag = nvg__fragUniformPtr(gl, call->uniformOffset);
- memset(frag, 0, sizeof(*frag));
- frag->strokeThr = -1.0f;
- frag->type = NSVG_SHADER_SIMPLE;
- // Fill shader
- glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset + gl->fragSize), paint, scissor, fringe, fringe, -1.0f);
- } else {
- call->uniformOffset = glnvg__allocFragUniforms(gl, 1);
- if (call->uniformOffset == -1) goto error;
- // Fill shader
- glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset), paint, scissor, fringe, fringe, -1.0f);
- }
-
- return;
-
-error:
- // We get here if call alloc was ok, but something else is not.
- // Roll back the last call to prevent drawing it.
- if (gl->ncalls > 0) gl->ncalls--;
-}
-
-static void glnvg__renderStroke(void* uptr, NVGpaint* paint, NVGscissor* scissor, float fringe,
- float strokeWidth, const NVGpath* paths, int npaths)
-{
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- GLNVGcall* call = glnvg__allocCall(gl);
- int i, maxverts, offset;
-
- if (call == NULL) return;
-
- call->type = GLNVG_STROKE;
- call->pathOffset = glnvg__allocPaths(gl, npaths);
- if (call->pathOffset == -1) goto error;
- call->pathCount = npaths;
- call->image = paint->image;
-
- // Allocate vertices for all the paths.
- maxverts = glnvg__maxVertCount(paths, npaths);
- offset = glnvg__allocVerts(gl, maxverts);
- if (offset == -1) goto error;
-
- for (i = 0; i < npaths; i++) {
- GLNVGpath* copy = &gl->paths[call->pathOffset + i];
- const NVGpath* path = &paths[i];
- memset(copy, 0, sizeof(GLNVGpath));
- if (path->nstroke) {
- copy->strokeOffset = offset;
- copy->strokeCount = path->nstroke;
- memcpy(&gl->verts[offset], path->stroke, sizeof(NVGvertex) * path->nstroke);
- offset += path->nstroke;
- }
- }
-
- if (gl->flags & NVG_STENCIL_STROKES) {
- // Fill shader
- call->uniformOffset = glnvg__allocFragUniforms(gl, 2);
- if (call->uniformOffset == -1) goto error;
-
- glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset), paint, scissor, strokeWidth, fringe, -1.0f);
- glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset + gl->fragSize), paint, scissor, strokeWidth, fringe, 1.0f - 0.5f/255.0f);
-
- } else {
- // Fill shader
- call->uniformOffset = glnvg__allocFragUniforms(gl, 1);
- if (call->uniformOffset == -1) goto error;
- glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset), paint, scissor, strokeWidth, fringe, -1.0f);
- }
-
- return;
-
-error:
- // We get here if call alloc was ok, but something else is not.
- // Roll back the last call to prevent drawing it.
- if (gl->ncalls > 0) gl->ncalls--;
-}
-
-static void glnvg__renderTriangles(void* uptr, NVGpaint* paint, NVGscissor* scissor,
- const NVGvertex* verts, int nverts)
-{
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- GLNVGcall* call = glnvg__allocCall(gl);
- GLNVGfragUniforms* frag;
-
- if (call == NULL) return;
-
- call->type = GLNVG_TRIANGLES;
- call->image = paint->image;
-
- // Allocate vertices for all the paths.
- call->triangleOffset = glnvg__allocVerts(gl, nverts);
- if (call->triangleOffset == -1) goto error;
- call->triangleCount = nverts;
-
- memcpy(&gl->verts[call->triangleOffset], verts, sizeof(NVGvertex) * nverts);
-
- // Fill shader
- call->uniformOffset = glnvg__allocFragUniforms(gl, 1);
- if (call->uniformOffset == -1) goto error;
- frag = nvg__fragUniformPtr(gl, call->uniformOffset);
- glnvg__convertPaint(gl, frag, paint, scissor, 1.0f, 1.0f, -1.0f);
- frag->type = NSVG_SHADER_IMG;
-
- return;
-
-error:
- // We get here if call alloc was ok, but something else is not.
- // Roll back the last call to prevent drawing it.
- if (gl->ncalls > 0) gl->ncalls--;
-}
-
-static void glnvg__renderDelete(void* uptr)
-{
- GLNVGcontext* gl = (GLNVGcontext*)uptr;
- int i;
- if (gl == NULL) return;
-
- glnvg__deleteShader(&gl->shader);
-
-#if NANOVG_GL3
-#if NANOVG_GL_USE_UNIFORMBUFFER
- if (gl->fragBuf != 0)
- glDeleteBuffers(1, &gl->fragBuf);
-#endif
- if (gl->vertArr != 0)
- glDeleteVertexArrays(1, &gl->vertArr);
-#endif
- if (gl->vertBuf != 0)
- glDeleteBuffers(1, &gl->vertBuf);
-
- for (i = 0; i < gl->ntextures; i++) {
- if (gl->textures[i].tex != 0 && (gl->textures[i].flags & NVG_IMAGE_NODELETE) == 0)
- glDeleteTextures(1, &gl->textures[i].tex);
- }
- free(gl->textures);
-
- free(gl->paths);
- free(gl->verts);
- free(gl->uniforms);
- free(gl->calls);
-
- free(gl);
-}
-
-
-#if defined NANOVG_GL2
-NVGcontext* nvgCreateGL2(int flags)
-#elif defined NANOVG_GL3
-NVGcontext* nvgCreateGL3(int flags)
-#elif defined NANOVG_GLES2
-NVGcontext* nvgCreateGLES2(int flags)
-#elif defined NANOVG_GLES3
-NVGcontext* nvgCreateGLES3(int flags)
-#endif
-{
- NVGparams params;
- NVGcontext* ctx = NULL;
- GLNVGcontext* gl = (GLNVGcontext*)malloc(sizeof(GLNVGcontext));
- if (gl == NULL) goto error;
- memset(gl, 0, sizeof(GLNVGcontext));
-
- memset(¶ms, 0, sizeof(params));
- params.renderCreate = glnvg__renderCreate;
- params.renderCreateTexture = glnvg__renderCreateTexture;
- params.renderDeleteTexture = glnvg__renderDeleteTexture;
- params.renderUpdateTexture = glnvg__renderUpdateTexture;
- params.renderGetTextureSize = glnvg__renderGetTextureSize;
- params.renderViewport = glnvg__renderViewport;
- params.renderCancel = glnvg__renderCancel;
- params.renderFlush = glnvg__renderFlush;
- params.renderFill = glnvg__renderFill;
- params.renderStroke = glnvg__renderStroke;
- params.renderTriangles = glnvg__renderTriangles;
- params.renderDelete = glnvg__renderDelete;
- params.userPtr = gl;
- params.edgeAntiAlias = flags & NVG_ANTIALIAS ? 1 : 0;
-
- gl->flags = flags;
-
- ctx = nvgCreateInternal(¶ms);
- if (ctx == NULL) goto error;
-
- return ctx;
-
-error:
- // 'gl' is freed by nvgDeleteInternal.
- if (ctx != NULL) nvgDeleteInternal(ctx);
- return NULL;
-}
-
-#if defined NANOVG_GL2
-void nvgDeleteGL2(NVGcontext* ctx)
-#elif defined NANOVG_GL3
-void nvgDeleteGL3(NVGcontext* ctx)
-#elif defined NANOVG_GLES2
-void nvgDeleteGLES2(NVGcontext* ctx)
-#elif defined NANOVG_GLES3
-void nvgDeleteGLES3(NVGcontext* ctx)
-#endif
-{
- nvgDeleteInternal(ctx);
-}
-
-int nvglCreateImageFromHandle(NVGcontext* ctx, GLuint textureId, int w, int h, int imageFlags)
-{
- GLNVGcontext* gl = (GLNVGcontext*)nvgInternalParams(ctx)->userPtr;
- GLNVGtexture* tex = glnvg__allocTexture(gl);
-
- if (tex == NULL) return 0;
-
- tex->type = NVG_TEXTURE_RGBA;
- tex->tex = textureId;
- tex->flags = imageFlags;
- tex->width = w;
- tex->height = h;
-
- return tex->id;
-}
-
-GLuint nvglImageHandle(NVGcontext* ctx, int image)
-{
- GLNVGcontext* gl = (GLNVGcontext*)nvgInternalParams(ctx)->userPtr;
- GLNVGtexture* tex = glnvg__findTexture(gl, image);
- return tex->tex;
-}
-
-#endif /* NANOVG_GL_IMPLEMENTATION */
diff --git a/dgl/src/nanovg2/nanovg_gl_utils.h b/dgl/src/nanovg2/nanovg_gl_utils.h
@@ -1,132 +0,0 @@
-//
-// Copyright (c) 2009-2013 Mikko Mononen memon@inside.org
-//
-// This software is provided 'as-is', without any express or implied
-// warranty. In no event will the authors be held liable for any damages
-// arising from the use of this software.
-// Permission is granted to anyone to use this software for any purpose,
-// including commercial applications, and to alter it and redistribute it
-// freely, subject to the following restrictions:
-// 1. The origin of this software must not be misrepresented; you must not
-// claim that you wrote the original software. If you use this software
-// in a product, an acknowledgment in the product documentation would be
-// appreciated but is not required.
-// 2. Altered source versions must be plainly marked as such, and must not be
-// misrepresented as being the original software.
-// 3. This notice may not be removed or altered from any source distribution.
-//
-#ifndef NANOVG_GL_UTILS_H
-#define NANOVG_GL_UTILS_H
-
-struct NVGLUframebuffer {
- NVGcontext* ctx;
- GLuint fbo;
- GLuint rbo;
- GLuint texture;
- int image;
-};
-typedef struct NVGLUframebuffer NVGLUframebuffer;
-
-// Helper function to create GL frame buffer to render to.
-void nvgluBindFramebuffer(NVGLUframebuffer* fb);
-NVGLUframebuffer* nvgluCreateFramebuffer(NVGcontext* ctx, int w, int h, int imageFlags);
-void nvgluDeleteFramebuffer(NVGcontext* ctx, NVGLUframebuffer* fb);
-
-#endif // NANOVG_GL_UTILS_H
-
-#ifdef NANOVG_GL_IMPLEMENTATION
-
-#if defined(NANOVG_GL3) || defined(NANOVG_GLES2) || defined(NANOVG_GLES3)
-// FBO is core in OpenGL 3>.
-# define NANOVG_FBO_VALID 1
-#elif defined(NANOVG_GL2)
-// On OS X including glext defines FBO on GL2 too.
-# ifdef __APPLE__
-# include <OpenGL/glext.h>
-# define NANOVG_FBO_VALID 1
-# endif
-#endif
-
-static GLint defaultFBO = -1;
-
-NVGLUframebuffer* nvgluCreateFramebuffer(NVGcontext* ctx, int w, int h, int imageFlags)
-{
-#ifdef NANOVG_FBO_VALID
- GLint defaultFBO;
- GLint defaultRBO;
- NVGLUframebuffer* fb = NULL;
-
- glGetIntegerv(GL_FRAMEBUFFER_BINDING, &defaultFBO);
- glGetIntegerv(GL_RENDERBUFFER_BINDING, &defaultRBO);
-
- fb = (NVGLUframebuffer*)malloc(sizeof(NVGLUframebuffer));
- if (fb == NULL) goto error;
- memset(fb, 0, sizeof(NVGLUframebuffer));
-
- fb->image = nvgCreateImageRGBA(ctx, w, h, imageFlags | NVG_IMAGE_FLIPY | NVG_IMAGE_PREMULTIPLIED, NULL);
- fb->texture = nvglImageHandle(ctx, fb->image);
-
- // frame buffer object
- glGenFramebuffers(1, &fb->fbo);
- glBindFramebuffer(GL_FRAMEBUFFER, fb->fbo);
-
- // render buffer object
- glGenRenderbuffers(1, &fb->rbo);
- glBindRenderbuffer(GL_RENDERBUFFER, fb->rbo);
- glRenderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX8, w, h);
-
- // combine all
- glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, fb->texture, 0);
- glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, fb->rbo);
-
- if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) goto error;
-
- glBindFramebuffer(GL_FRAMEBUFFER, defaultFBO);
- glBindRenderbuffer(GL_RENDERBUFFER, defaultRBO);
- return fb;
-error:
- glBindFramebuffer(GL_FRAMEBUFFER, defaultFBO);
- glBindRenderbuffer(GL_RENDERBUFFER, defaultRBO);
- nvgluDeleteFramebuffer(ctx, fb);
- return NULL;
-#else
- NVG_NOTUSED(ctx);
- NVG_NOTUSED(w);
- NVG_NOTUSED(h);
- NVG_NOTUSED(imageFlags);
- return NULL;
-#endif
-}
-
-void nvgluBindFramebuffer(NVGLUframebuffer* fb)
-{
-#ifdef NANOVG_FBO_VALID
- if (defaultFBO == -1) glGetIntegerv(GL_FRAMEBUFFER_BINDING, &defaultFBO);
- glBindFramebuffer(GL_FRAMEBUFFER, fb != NULL ? fb->fbo : defaultFBO);
-#else
- NVG_NOTUSED(fb);
-#endif
-}
-
-void nvgluDeleteFramebuffer(NVGcontext* ctx, NVGLUframebuffer* fb)
-{
-#ifdef NANOVG_FBO_VALID
- if (fb == NULL) return;
- if (fb->fbo != 0)
- glDeleteFramebuffers(1, &fb->fbo);
- if (fb->rbo != 0)
- glDeleteRenderbuffers(1, &fb->rbo);
- if (fb->image >= 0)
- nvgDeleteImage(ctx, fb->image);
- fb->fbo = 0;
- fb->rbo = 0;
- fb->texture = 0;
- fb->image = -1;
- free(fb);
-#else
- NVG_NOTUSED(ctx);
- NVG_NOTUSED(fb);
-#endif
-}
-
-#endif // NANOVG_GL_IMPLEMENTATION
diff --git a/dgl/src/nanovg2/stb_image.h b/dgl/src/nanovg2/stb_image.h
@@ -1,4647 +0,0 @@
-/* stb_image - v1.39 - public domain JPEG/PNG reader - http://nothings.org/stb_image.c
- when you control the images you're loading
- no warranty implied; use at your own risk
-
- Do this:
- #define STB_IMAGE_IMPLEMENTATION
- before you include this file in *one* C or C++ file to create the implementation.
-
- QUICK NOTES:
- Primarily of interest to game developers and other people who can
- avoid problematic images and only need the trivial interface
-
- JPEG baseline (no JPEG progressive)
- PNG 8-bit-per-channel only
-
- TGA (not sure what subset, if a subset)
- BMP non-1bpp, non-RLE
- PSD (composited view only, no extra channels)
-
- GIF (*comp always reports as 4-channel)
- HDR (radiance rgbE format)
- PIC (Softimage PIC)
-
- - stbi__jpeg_huff_decode from memory or through FILE (define STBI_NO_STDIO to remove code)
- - stbi__jpeg_huff_decode from arbitrary I/O callbacks
- - overridable dequantizing-IDCT, YCbCr-to-RGB conversion (define STBI_SIMD)
-
- Latest revisions:
- 1.39 (2014-06-15) TGA optimization fix, multiple BMP fixes
- 1.38 (2014-06-06) suppress MSVC run-time warnings, fix accidental rename of 'skip'
- 1.37 (2014-06-04) remove duplicate typedef
- 1.36 (2014-06-03) converted to header file, allow reading incorrect iphoned-images without iphone flag
- 1.35 (2014-05-27) warnings, bugfixes, TGA optimization, etc
- 1.34 (unknown ) warning fix
- 1.33 (2011-07-14) minor fixes suggested by Dave Moore
-
- See end of file for full revision history.
-
- TODO:
- stbi_info support for BMP,PSD,HDR,PIC
-
-
- ============================ Contributors =========================
-
- Image formats Bug fixes & warning fixes
- Sean Barrett (jpeg, png, bmp) Marc LeBlanc
- Nicolas Schulz (hdr, psd) Christpher Lloyd
- Jonathan Dummer (tga) Dave Moore
- Jean-Marc Lienher (gif) Won Chun
- Tom Seddon (pic) the Horde3D community
- Thatcher Ulrich (psd) Janez Zemva
- Jonathan Blow
- Laurent Gomila
- Extensions, features Aruelien Pocheville
- Jetro Lauha (stbi_info) Ryamond Barbiero
- James "moose2000" Brown (iPhone PNG) David Woo
- Ben "Disch" Wenger (io callbacks) Roy Eltham
- Martin "SpartanJ" Golini Luke Graham
- Thomas Ruf
- John Bartholomew
- Optimizations & bugfixes Ken Hamada
- Fabian "ryg" Giesen Cort Stratton
- Arseny Kapoulkine Blazej Dariusz Roszkowski
- Thibault Reuille
- If your name should be here but Paul Du Bois
- isn't, let Sean know. Guillaume George
- Jerry Jansson
- Hayaki Saito
-*/
-
-#ifndef STBI_INCLUDE_STB_IMAGE_H
-#define STBI_INCLUDE_STB_IMAGE_H
-
-// Limitations:
-// - no jpeg progressive support
-// - non-HDR formats support 8-bit samples only (jpeg, png)
-// - no delayed line count (jpeg) -- IJG doesn't support either
-// - no 1-bit BMP
-// - GIF always returns *comp=4
-//
-// Basic usage (see HDR discussion below):
-// int x,y,n;
-// unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
-// // ... process data if not NULL ...
-// // ... x = width, y = height, n = # 8-bit components per pixel ...
-// // ... replace '0' with '1'..'4' to force that many components per pixel
-// // ... but 'n' will always be the number that it would have been if you said 0
-// stbi_image_free(data)
-//
-// Standard parameters:
-// int *x -- outputs image width in pixels
-// int *y -- outputs image height in pixels
-// int *comp -- outputs # of image components in image file
-// int req_comp -- if non-zero, # of image components requested in result
-//
-// The return value from an image loader is an 'unsigned char *' which points
-// to the pixel data. The pixel data consists of *y scanlines of *x pixels,
-// with each pixel consisting of N interleaved 8-bit components; the first
-// pixel pointed to is top-left-most in the image. There is no padding between
-// image scanlines or between pixels, regardless of format. The number of
-// components N is 'req_comp' if req_comp is non-zero, or *comp otherwise.
-// If req_comp is non-zero, *comp has the number of components that _would_
-// have been output otherwise. E.g. if you set req_comp to 4, you will always
-// get RGBA output, but you can check *comp to easily see if it's opaque.
-//
-// An output image with N components has the following components interleaved
-// in this order in each pixel:
-//
-// N=#comp components
-// 1 grey
-// 2 grey, alpha
-// 3 red, green, blue
-// 4 red, green, blue, alpha
-//
-// If image loading fails for any reason, the return value will be NULL,
-// and *x, *y, *comp will be unchanged. The function stbi_failure_reason()
-// can be queried for an extremely brief, end-user unfriendly explanation
-// of why the load failed. Define STBI_NO_FAILURE_STRINGS to avoid
-// compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly
-// more user-friendly ones.
-//
-// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
-//
-// ===========================================================================
-//
-// iPhone PNG support:
-//
-// By default we convert iphone-formatted PNGs back to RGB; nominally they
-// would silently load as BGR, except the existing code should have just
-// failed on such iPhone PNGs. But you can disable this conversion by
-// by calling stbi_convert_iphone_png_to_rgb(0), in which case
-// you will always just get the native iphone "format" through.
-//
-// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
-// pixel to remove any premultiplied alpha *only* if the image file explicitly
-// says there's premultiplied data (currently only happens in iPhone images,
-// and only if iPhone convert-to-rgb processing is on).
-//
-// ===========================================================================
-//
-// HDR image support (disable by defining STBI_NO_HDR)
-//
-// stb_image now supports loading HDR images in general, and currently
-// the Radiance .HDR file format, although the support is provided
-// generically. You can still load any file through the existing interface;
-// if you attempt to load an HDR file, it will be automatically remapped to
-// LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1;
-// both of these constants can be reconfigured through this interface:
-//
-// stbi_hdr_to_ldr_gamma(2.2f);
-// stbi_hdr_to_ldr_scale(1.0f);
-//
-// (note, do not use _inverse_ constants; stbi_image will invert them
-// appropriately).
-//
-// Additionally, there is a new, parallel interface for loading files as
-// (linear) floats to preserve the full dynamic range:
-//
-// float *data = stbi_loadf(filename, &x, &y, &n, 0);
-//
-// If you load LDR images through this interface, those images will
-// be promoted to floating point values, run through the inverse of
-// constants corresponding to the above:
-//
-// stbi_ldr_to_hdr_scale(1.0f);
-// stbi_ldr_to_hdr_gamma(2.2f);
-//
-// Finally, given a filename (or an open file or memory block--see header
-// file for details) containing image data, you can query for the "most
-// appropriate" interface to use (that is, whether the image is HDR or
-// not), using:
-//
-// stbi_is_hdr(char *filename);
-//
-// ===========================================================================
-//
-// I/O callbacks
-//
-// I/O callbacks allow you to read from arbitrary sources, like packaged
-// files or some other source. Data read from callbacks are processed
-// through a small internal buffer (currently 128 bytes) to try to reduce
-// overhead.
-//
-// The three functions you must define are "read" (reads some bytes of data),
-// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end).
-
-
-#ifndef STBI_NO_STDIO
-
-#if defined(_MSC_VER) && _MSC_VER >= 1400
-#define _CRT_SECURE_NO_WARNINGS // suppress warnings about fopen()
-#pragma warning(push)
-#pragma warning(disable:4996) // suppress even more warnings about fopen()
-#endif
-#include <stdio.h>
-#endif // STBI_NO_STDIO
-
-#define STBI_VERSION 1
-
-enum
-{
- STBI_default = 0, // only used for req_comp
-
- STBI_grey = 1,
- STBI_grey_alpha = 2,
- STBI_rgb = 3,
- STBI_rgb_alpha = 4
-};
-
-typedef unsigned char stbi_uc;
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifdef STB_IMAGE_STATIC
-#define STBIDEF static
-#else
-#define STBIDEF extern
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// PRIMARY API - works on images of any type
-//
-
-//
-// load image by filename, open file, or memory buffer
-//
-
-STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
-
-#ifndef STBI_NO_STDIO
-STBIDEF stbi_uc *stbi_load (char const *filename, int *x, int *y, int *comp, int req_comp);
-STBIDEF stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp);
-// for stbi_load_from_file, file pointer is left pointing immediately after image
-#endif
-
-typedef struct
-{
- int (*read) (void *user,char *data,int size); // fill 'data' with 'size' bytes. return number of bytes actually read
- void (*skip) (void *user,int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative
- int (*eof) (void *user); // returns nonzero if we are at end of file/data
-} stbi_io_callbacks;
-
-STBIDEF stbi_uc *stbi_load_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp);
-
-#ifndef STBI_NO_HDR
- STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
-
- #ifndef STBI_NO_STDIO
- STBIDEF float *stbi_loadf (char const *filename, int *x, int *y, int *comp, int req_comp);
- STBIDEF float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *comp, int req_comp);
- #endif
-
- STBIDEF float *stbi_loadf_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp);
-
- STBIDEF void stbi_hdr_to_ldr_gamma(float gamma);
- STBIDEF void stbi_hdr_to_ldr_scale(float scale);
-
- STBIDEF void stbi_ldr_to_hdr_gamma(float gamma);
- STBIDEF void stbi_ldr_to_hdr_scale(float scale);
-#endif // STBI_NO_HDR
-
-// stbi_is_hdr is always defined
-STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user);
-STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len);
-#ifndef STBI_NO_STDIO
-STBIDEF int stbi_is_hdr (char const *filename);
-STBIDEF int stbi_is_hdr_from_file(FILE *f);
-#endif // STBI_NO_STDIO
-
-
-// get a VERY brief reason for failure
-// NOT THREADSAFE
-STBIDEF const char *stbi_failure_reason (void);
-
-// free the loaded image -- this is just free()
-STBIDEF void stbi_image_free (void *retval_from_stbi_load);
-
-// get image dimensions & components without fully decoding
-STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp);
-STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp);
-
-#ifndef STBI_NO_STDIO
-STBIDEF int stbi_info (char const *filename, int *x, int *y, int *comp);
-STBIDEF int stbi_info_from_file (FILE *f, int *x, int *y, int *comp);
-
-#endif
-
-
-
-// for image formats that explicitly notate that they have premultiplied alpha,
-// we just return the colors as stored in the file. set this flag to force
-// unpremultiplication. results are undefined if the unpremultiply overflow.
-STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply);
-
-// indicate whether we should process iphone images back to canonical format,
-// or just pass them through "as-is"
-STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert);
-
-
-// ZLIB client - used by PNG, available for other purposes
-
-STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen);
-STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header);
-STBIDEF char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen);
-STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
-
-STBIDEF char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen);
-STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
-
-
-// define faster low-level operations (typically SIMD support)
-#ifdef STBI_SIMD
-typedef void (*stbi_idct_8x8)(stbi_uc *out, int out_stride, short data[64], unsigned short *dequantize);
-// compute an integer IDCT on "input"
-// input[x] = data[x] * dequantize[x]
-// write results to 'out': 64 samples, each run of 8 spaced by 'out_stride'
-// CLAMP results to 0..255
-typedef void (*stbi_YCbCr_to_RGB_run)(stbi_uc *output, stbi_uc const *y, stbi_uc const *cb, stbi_uc const *cr, int count, int step);
-// compute a conversion from YCbCr to RGB
-// 'count' pixels
-// write pixels to 'output'; each pixel is 'step' bytes (either 3 or 4; if 4, write '255' as 4th), order R,G,B
-// y: Y input channel
-// cb: Cb input channel; scale/biased to be 0..255
-// cr: Cr input channel; scale/biased to be 0..255
-
-STBIDEF void stbi_install_idct(stbi_idct_8x8 func);
-STBIDEF void stbi_install_YCbCr_to_RGB(stbi_YCbCr_to_RGB_run func);
-#endif // STBI_SIMD
-
-
-#ifdef __cplusplus
-}
-#endif
-
-//
-//
-//// end header file /////////////////////////////////////////////////////
-#endif // STBI_INCLUDE_STB_IMAGE_H
-
-#ifdef STB_IMAGE_IMPLEMENTATION
-
-#ifndef STBI_NO_HDR
-#include <math.h> // ldexp
-#include <string.h> // strcmp, strtok
-#endif
-
-#ifndef STBI_NO_STDIO
-#include <stdio.h>
-#endif
-#include <stdlib.h>
-#include <memory.h>
-#include <assert.h>
-#include <stdarg.h>
-#include <stddef.h> // ptrdiff_t on osx
-
-#ifndef _MSC_VER
- #ifdef __cplusplus
- #define stbi_inline inline
- #else
- #define stbi_inline
- #endif
-#else
- #define stbi_inline __forceinline
-#endif
-
-
-#ifdef _MSC_VER
-typedef unsigned short stbi__uint16;
-typedef signed short stbi__int16;
-typedef unsigned int stbi__uint32;
-typedef signed int stbi__int32;
-#else
-#include <stdint.h>
-typedef uint16_t stbi__uint16;
-typedef int16_t stbi__int16;
-typedef uint32_t stbi__uint32;
-typedef int32_t stbi__int32;
-#endif
-
-// should produce compiler error if size is wrong
-typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1];
-
-#ifdef _MSC_VER
-#define STBI_NOTUSED(v) (void)(v)
-#else
-#define STBI_NOTUSED(v) (void)sizeof(v)
-#endif
-
-#ifdef _MSC_VER
-#define STBI_HAS_LROTL
-#endif
-
-#ifdef STBI_HAS_LROTL
- #define stbi_lrot(x,y) _lrotl(x,y)
-#else
- #define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y))))
-#endif
-
-///////////////////////////////////////////////
-//
-// stbi__context struct and start_xxx functions
-
-// stbi__context structure is our basic context used by all images, so it
-// contains all the IO context, plus some basic image information
-typedef struct
-{
- stbi__uint32 img_x, img_y;
- int img_n, img_out_n;
-
- stbi_io_callbacks io;
- void *io_user_data;
-
- int read_from_callbacks;
- int buflen;
- stbi_uc buffer_start[128];
-
- stbi_uc *img_buffer, *img_buffer_end;
- stbi_uc *img_buffer_original;
-} stbi__context;
-
-
-static void stbi__refill_buffer(stbi__context *s);
-
-// initialize a memory-stbi__jpeg_huff_decode context
-static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len)
-{
- s->io.read = NULL;
- s->read_from_callbacks = 0;
- s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer;
- s->img_buffer_end = (stbi_uc *) buffer+len;
-}
-
-// initialize a callback-based context
-static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void *user)
-{
- s->io = *c;
- s->io_user_data = user;
- s->buflen = sizeof(s->buffer_start);
- s->read_from_callbacks = 1;
- s->img_buffer_original = s->buffer_start;
- stbi__refill_buffer(s);
-}
-
-#ifndef STBI_NO_STDIO
-
-static int stbi__stdio_read(void *user, char *data, int size)
-{
- return (int) fread(data,1,size,(FILE*) user);
-}
-
-static void stbi__stdio_skip(void *user, int n)
-{
- fseek((FILE*) user, n, SEEK_CUR);
-}
-
-static int stbi__stdio_eof(void *user)
-{
- return feof((FILE*) user);
-}
-
-static stbi_io_callbacks stbi__stdio_callbacks =
-{
- stbi__stdio_read,
- stbi__stdio_skip,
- stbi__stdio_eof,
-};
-
-static void stbi__start_file(stbi__context *s, FILE *f)
-{
- stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f);
-}
-
-//static void stop_file(stbi__context *s) { }
-
-#endif // !STBI_NO_STDIO
-
-static void stbi__rewind(stbi__context *s)
-{
- // conceptually rewind SHOULD rewind to the beginning of the stream,
- // but we just rewind to the beginning of the initial buffer, because
- // we only use it after doing 'test', which only ever looks at at most 92 bytes
- s->img_buffer = s->img_buffer_original;
-}
-
-static int stbi__jpeg_test(stbi__context *s);
-static stbi_uc *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp);
-static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp);
-static int stbi__png_test(stbi__context *s);
-static stbi_uc *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp);
-static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp);
-static int stbi__bmp_test(stbi__context *s);
-static stbi_uc *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp);
-static int stbi__tga_test(stbi__context *s);
-static stbi_uc *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp);
-static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp);
-static int stbi__psd_test(stbi__context *s);
-static stbi_uc *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp);
-#ifndef STBI_NO_HDR
-static int stbi__hdr_test(stbi__context *s);
-static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp);
-#endif
-static int stbi__pic_test(stbi__context *s);
-static stbi_uc *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp);
-static int stbi__gif_test(stbi__context *s);
-static stbi_uc *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp);
-static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp);
-
-
-// this is not threadsafe
-static const char *stbi__g_failure_reason;
-
-STBIDEF const char *stbi_failure_reason(void)
-{
- return stbi__g_failure_reason;
-}
-
-static int stbi__err(const char *str)
-{
- stbi__g_failure_reason = str;
- return 0;
-}
-
-// stbi__err - error
-// stbi__errpf - error returning pointer to float
-// stbi__errpuc - error returning pointer to unsigned char
-
-#ifdef STBI_NO_FAILURE_STRINGS
- #define stbi__err(x,y) 0
-#elif defined(STBI_FAILURE_USERMSG)
- #define stbi__err(x,y) stbi__err(y)
-#else
- #define stbi__err(x,y) stbi__err(x)
-#endif
-
-#define stbi__errpf(x,y) ((float *) (stbi__err(x,y)?NULL:NULL))
-#define stbi__errpuc(x,y) ((unsigned char *) (stbi__err(x,y)?NULL:NULL))
-
-STBIDEF void stbi_image_free(void *retval_from_stbi_load)
-{
- free(retval_from_stbi_load);
-}
-
-#ifndef STBI_NO_HDR
-static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp);
-static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp);
-#endif
-
-static unsigned char *stbi_load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
- if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp);
- if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp);
- if (stbi__bmp_test(s)) return stbi__bmp_load(s,x,y,comp,req_comp);
- if (stbi__gif_test(s)) return stbi__gif_load(s,x,y,comp,req_comp);
- if (stbi__psd_test(s)) return stbi__psd_load(s,x,y,comp,req_comp);
- if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp);
-
- #ifndef STBI_NO_HDR
- if (stbi__hdr_test(s)) {
- float *hdr = stbi__hdr_load(s, x,y,comp,req_comp);
- return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp);
- }
- #endif
-
- // test tga last because it's a crappy test!
- if (stbi__tga_test(s))
- return stbi__tga_load(s,x,y,comp,req_comp);
- return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt");
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF unsigned char *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp)
-{
- FILE *f = fopen(filename, "rb");
- unsigned char *result;
- if (!f) return stbi__errpuc("can't fopen", "Unable to open file");
- result = stbi_load_from_file(f,x,y,comp,req_comp);
- fclose(f);
- return result;
-}
-
-STBIDEF unsigned char *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
- unsigned char *result;
- stbi__context s;
- stbi__start_file(&s,f);
- result = stbi_load_main(&s,x,y,comp,req_comp);
- if (result) {
- // need to 'unget' all the characters in the IO buffer
- fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
- }
- return result;
-}
-#endif //!STBI_NO_STDIO
-
-STBIDEF unsigned char *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
- stbi__context s;
- stbi__start_mem(&s,buffer,len);
- return stbi_load_main(&s,x,y,comp,req_comp);
-}
-
-unsigned char *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
-{
- stbi__context s;
- stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
- return stbi_load_main(&s,x,y,comp,req_comp);
-}
-
-#ifndef STBI_NO_HDR
-
-float *stbi_loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
- unsigned char *data;
- #ifndef STBI_NO_HDR
- if (stbi__hdr_test(s))
- return stbi__hdr_load(s,x,y,comp,req_comp);
- #endif
- data = stbi_load_main(s, x, y, comp, req_comp);
- if (data)
- return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp);
- return stbi__errpf("unknown image type", "Image not of any known type, or corrupt");
-}
-
-float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
- stbi__context s;
- stbi__start_mem(&s,buffer,len);
- return stbi_loadf_main(&s,x,y,comp,req_comp);
-}
-
-float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
-{
- stbi__context s;
- stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
- return stbi_loadf_main(&s,x,y,comp,req_comp);
-}
-
-#ifndef STBI_NO_STDIO
-float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
-{
- FILE *f = fopen(filename, "rb");
- float *result;
- if (!f) return stbi__errpf("can't fopen", "Unable to open file");
- result = stbi_loadf_from_file(f,x,y,comp,req_comp);
- fclose(f);
- return result;
-}
-
-float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
- stbi__context s;
- stbi__start_file(&s,f);
- return stbi_loadf_main(&s,x,y,comp,req_comp);
-}
-#endif // !STBI_NO_STDIO
-
-#endif // !STBI_NO_HDR
-
-// these is-hdr-or-not is defined independent of whether STBI_NO_HDR is
-// defined, for API simplicity; if STBI_NO_HDR is defined, it always
-// reports false!
-
-int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
-{
- #ifndef STBI_NO_HDR
- stbi__context s;
- stbi__start_mem(&s,buffer,len);
- return stbi__hdr_test(&s);
- #else
- STBI_NOTUSED(buffer);
- STBI_NOTUSED(len);
- return 0;
- #endif
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF int stbi_is_hdr (char const *filename)
-{
- FILE *f = fopen(filename, "rb");
- int result=0;
- if (f) {
- result = stbi_is_hdr_from_file(f);
- fclose(f);
- }
- return result;
-}
-
-STBIDEF int stbi_is_hdr_from_file(FILE *f)
-{
- #ifndef STBI_NO_HDR
- stbi__context s;
- stbi__start_file(&s,f);
- return stbi__hdr_test(&s);
- #else
- return 0;
- #endif
-}
-#endif // !STBI_NO_STDIO
-
-STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
-{
- #ifndef STBI_NO_HDR
- stbi__context s;
- stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
- return stbi__hdr_test(&s);
- #else
- return 0;
- #endif
-}
-
-#ifndef STBI_NO_HDR
-static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f;
-static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f;
-
-void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
-void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
-
-void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
-void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
-#endif
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// Common code used by all image loaders
-//
-
-enum
-{
- SCAN_load=0,
- SCAN_type,
- SCAN_header
-};
-
-static void stbi__refill_buffer(stbi__context *s)
-{
- int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen);
- if (n == 0) {
- // at end of file, treat same as if from memory, but need to handle case
- // where s->img_buffer isn't pointing to safe memory, stbi__err.g. 0-byte file
- s->read_from_callbacks = 0;
- s->img_buffer = s->buffer_start;
- s->img_buffer_end = s->buffer_start+1;
- *s->img_buffer = 0;
- } else {
- s->img_buffer = s->buffer_start;
- s->img_buffer_end = s->buffer_start + n;
- }
-}
-
-stbi_inline static stbi_uc stbi__get8(stbi__context *s)
-{
- if (s->img_buffer < s->img_buffer_end)
- return *s->img_buffer++;
- if (s->read_from_callbacks) {
- stbi__refill_buffer(s);
- return *s->img_buffer++;
- }
- return 0;
-}
-
-stbi_inline static int stbi__at_eof(stbi__context *s)
-{
- if (s->io.read) {
- if (!(s->io.eof)(s->io_user_data)) return 0;
- // if feof() is true, check if buffer = end
- // special case: we've only got the special 0 character at the end
- if (s->read_from_callbacks == 0) return 1;
- }
-
- return s->img_buffer >= s->img_buffer_end;
-}
-
-static void stbi__skip(stbi__context *s, int n)
-{
- if (s->io.read) {
- int blen = (int) (s->img_buffer_end - s->img_buffer);
- if (blen < n) {
- s->img_buffer = s->img_buffer_end;
- (s->io.skip)(s->io_user_data, n - blen);
- return;
- }
- }
- s->img_buffer += n;
-}
-
-static int stbi__getn(stbi__context *s, stbi_uc *buffer, int n)
-{
- if (s->io.read) {
- int blen = (int) (s->img_buffer_end - s->img_buffer);
- if (blen < n) {
- int res, count;
-
- memcpy(buffer, s->img_buffer, blen);
-
- count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen);
- res = (count == (n-blen));
- s->img_buffer = s->img_buffer_end;
- return res;
- }
- }
-
- if (s->img_buffer+n <= s->img_buffer_end) {
- memcpy(buffer, s->img_buffer, n);
- s->img_buffer += n;
- return 1;
- } else
- return 0;
-}
-
-static int stbi__get16be(stbi__context *s)
-{
- int z = stbi__get8(s);
- return (z << 8) + stbi__get8(s);
-}
-
-static stbi__uint32 stbi__get32be(stbi__context *s)
-{
- stbi__uint32 z = stbi__get16be(s);
- return (z << 16) + stbi__get16be(s);
-}
-
-static int stbi__get16le(stbi__context *s)
-{
- int z = stbi__get8(s);
- return z + (stbi__get8(s) << 8);
-}
-
-static stbi__uint32 stbi__get32le(stbi__context *s)
-{
- stbi__uint32 z = stbi__get16le(s);
- return z + (stbi__get16le(s) << 16);
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// generic converter from built-in img_n to req_comp
-// individual types do this automatically as much as possible (stbi__err.g. jpeg
-// does all cases internally since it needs to colorspace convert anyway,
-// and it never has alpha, so very few cases ). png can automatically
-// interleave an alpha=255 channel, but falls back to this for other cases
-//
-// assume data buffer is malloced, so malloc a new one and free that one
-// only failure mode is malloc failing
-
-static stbi_uc stbi__compute_y(int r, int g, int b)
-{
- return (stbi_uc) (((r*77) + (g*150) + (29*b)) >> 8);
-}
-
-static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y)
-{
- int i,j;
- unsigned char *good;
-
- if (req_comp == img_n) return data;
- assert(req_comp >= 1 && req_comp <= 4);
-
- good = (unsigned char *) malloc(req_comp * x * y);
- if (good == NULL) {
- free(data);
- return stbi__errpuc("outofmem", "Out of memory");
- }
-
- for (j=0; j < (int) y; ++j) {
- unsigned char *src = data + j * x * img_n ;
- unsigned char *dest = good + j * x * req_comp;
-
- #define COMBO(a,b) ((a)*8+(b))
- #define CASE(a,b) case COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
- // convert source image with img_n components to one with req_comp components;
- // avoid switch per pixel, so use switch per scanline and massive macros
- switch (COMBO(img_n, req_comp)) {
- CASE(1,2) dest[0]=src[0], dest[1]=255; break;
- CASE(1,3) dest[0]=dest[1]=dest[2]=src[0]; break;
- CASE(1,4) dest[0]=dest[1]=dest[2]=src[0], dest[3]=255; break;
- CASE(2,1) dest[0]=src[0]; break;
- CASE(2,3) dest[0]=dest[1]=dest[2]=src[0]; break;
- CASE(2,4) dest[0]=dest[1]=dest[2]=src[0], dest[3]=src[1]; break;
- CASE(3,4) dest[0]=src[0],dest[1]=src[1],dest[2]=src[2],dest[3]=255; break;
- CASE(3,1) dest[0]=stbi__compute_y(src[0],src[1],src[2]); break;
- CASE(3,2) dest[0]=stbi__compute_y(src[0],src[1],src[2]), dest[1] = 255; break;
- CASE(4,1) dest[0]=stbi__compute_y(src[0],src[1],src[2]); break;
- CASE(4,2) dest[0]=stbi__compute_y(src[0],src[1],src[2]), dest[1] = src[3]; break;
- CASE(4,3) dest[0]=src[0],dest[1]=src[1],dest[2]=src[2]; break;
- default: assert(0);
- }
- #undef CASE
- }
-
- free(data);
- return good;
-}
-
-#ifndef STBI_NO_HDR
-static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp)
-{
- int i,k,n;
- float *output = (float *) malloc(x * y * comp * sizeof(float));
- if (output == NULL) { free(data); return stbi__errpf("outofmem", "Out of memory"); }
- // compute number of non-alpha components
- if (comp & 1) n = comp; else n = comp-1;
- for (i=0; i < x*y; ++i) {
- for (k=0; k < n; ++k) {
- output[i*comp + k] = (float) (pow(data[i*comp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale);
- }
- if (k < comp) output[i*comp + k] = data[i*comp+k]/255.0f;
- }
- free(data);
- return output;
-}
-
-#define stbi__float2int(x) ((int) (x))
-static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp)
-{
- int i,k,n;
- stbi_uc *output = (stbi_uc *) malloc(x * y * comp);
- if (output == NULL) { free(data); return stbi__errpuc("outofmem", "Out of memory"); }
- // compute number of non-alpha components
- if (comp & 1) n = comp; else n = comp-1;
- for (i=0; i < x*y; ++i) {
- for (k=0; k < n; ++k) {
- float z = (float) pow(data[i*comp+k]*stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f;
- if (z < 0) z = 0;
- if (z > 255) z = 255;
- output[i*comp + k] = (stbi_uc) stbi__float2int(z);
- }
- if (k < comp) {
- float z = data[i*comp+k] * 255 + 0.5f;
- if (z < 0) z = 0;
- if (z > 255) z = 255;
- output[i*comp + k] = (stbi_uc) stbi__float2int(z);
- }
- }
- free(data);
- return output;
-}
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// "baseline" JPEG/JFIF decoder (not actually fully baseline implementation)
-//
-// simple implementation
-// - channel subsampling of at most 2 in each dimension
-// - doesn't support delayed output of y-dimension
-// - simple interface (only one output format: 8-bit interleaved RGB)
-// - doesn't try to recover corrupt jpegs
-// - doesn't allow partial loading, loading multiple at once
-// - still fast on x86 (copying globals into locals doesn't help x86)
-// - allocates lots of intermediate memory (full size of all components)
-// - non-interleaved case requires this anyway
-// - allows good upsampling (see next)
-// high-quality
-// - upsampled channels are bilinearly interpolated, even across blocks
-// - quality integer IDCT derived from IJG's 'slow'
-// performance
-// - fast huffman; reasonable integer IDCT
-// - uses a lot of intermediate memory, could cache poorly
-// - load http://nothings.org/remote/anemones.jpg 3 times on 2.8Ghz P4
-// stb_jpeg: 1.34 seconds (MSVC6, default release build)
-// stb_jpeg: 1.06 seconds (MSVC6, processor = Pentium Pro)
-// IJL11.dll: 1.08 seconds (compiled by intel)
-// IJG 1998: 0.98 seconds (MSVC6, makefile provided by IJG)
-// IJG 1998: 0.95 seconds (MSVC6, makefile + proc=PPro)
-
-// huffman decoding acceleration
-#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache
-
-typedef struct
-{
- stbi_uc fast[1 << FAST_BITS];
- // weirdly, repacking this into AoS is a 10% speed loss, instead of a win
- stbi__uint16 code[256];
- stbi_uc values[256];
- stbi_uc size[257];
- unsigned int maxcode[18];
- int delta[17]; // old 'firstsymbol' - old 'firstcode'
-} stbi__huffman;
-
-typedef struct
-{
- #ifdef STBI_SIMD
- unsigned short dequant2[4][64];
- #endif
- stbi__context *s;
- stbi__huffman huff_dc[4];
- stbi__huffman huff_ac[4];
- stbi_uc dequant[4][64];
-
-// sizes for components, interleaved MCUs
- int img_h_max, img_v_max;
- int img_mcu_x, img_mcu_y;
- int img_mcu_w, img_mcu_h;
-
-// definition of jpeg image component
- struct
- {
- int id;
- int h,v;
- int tq;
- int hd,ha;
- int dc_pred;
-
- int x,y,w2,h2;
- stbi_uc *data;
- void *raw_data;
- stbi_uc *linebuf;
- } img_comp[4];
-
- stbi__uint32 code_buffer; // jpeg entropy-coded buffer
- int code_bits; // number of valid bits
- unsigned char marker; // marker seen while filling entropy buffer
- int nomore; // flag if we saw a marker so must stop
-
- int scan_n, order[4];
- int restart_interval, todo;
-} stbi__jpeg;
-
-static int stbi__build_huffman(stbi__huffman *h, int *count)
-{
- int i,j,k=0,code;
- // build size list for each symbol (from JPEG spec)
- for (i=0; i < 16; ++i)
- for (j=0; j < count[i]; ++j)
- h->size[k++] = (stbi_uc) (i+1);
- h->size[k] = 0;
-
- // compute actual symbols (from jpeg spec)
- code = 0;
- k = 0;
- for(j=1; j <= 16; ++j) {
- // compute delta to add to code to compute symbol id
- h->delta[j] = k - code;
- if (h->size[k] == j) {
- while (h->size[k] == j)
- h->code[k++] = (stbi__uint16) (code++);
- if (code-1 >= (1 << j)) return stbi__err("bad code lengths","Corrupt JPEG");
- }
- // compute largest code + 1 for this size, preshifted as needed later
- h->maxcode[j] = code << (16-j);
- code <<= 1;
- }
- h->maxcode[j] = 0xffffffff;
-
- // build non-spec acceleration table; 255 is flag for not-accelerated
- memset(h->fast, 255, 1 << FAST_BITS);
- for (i=0; i < k; ++i) {
- int s = h->size[i];
- if (s <= FAST_BITS) {
- int c = h->code[i] << (FAST_BITS-s);
- int m = 1 << (FAST_BITS-s);
- for (j=0; j < m; ++j) {
- h->fast[c+j] = (stbi_uc) i;
- }
- }
- }
- return 1;
-}
-
-static void stbi__grow_buffer_unsafe(stbi__jpeg *j)
-{
- do {
- int b = j->nomore ? 0 : stbi__get8(j->s);
- if (b == 0xff) {
- int c = stbi__get8(j->s);
- if (c != 0) {
- j->marker = (unsigned char) c;
- j->nomore = 1;
- return;
- }
- }
- j->code_buffer |= b << (24 - j->code_bits);
- j->code_bits += 8;
- } while (j->code_bits <= 24);
-}
-
-// (1 << n) - 1
-static stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535};
-
-// stbi__jpeg_huff_decode a jpeg huffman value from the bitstream
-stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h)
-{
- unsigned int temp;
- int c,k;
-
- if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
-
- // look at the top FAST_BITS and determine what symbol ID it is,
- // if the code is <= FAST_BITS
- c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
- k = h->fast[c];
- if (k < 255) {
- int s = h->size[k];
- if (s > j->code_bits)
- return -1;
- j->code_buffer <<= s;
- j->code_bits -= s;
- return h->values[k];
- }
-
- // naive test is to shift the code_buffer down so k bits are
- // valid, then test against maxcode. To speed this up, we've
- // preshifted maxcode left so that it has (16-k) 0s at the
- // end; in other words, regardless of the number of bits, it
- // wants to be compared against something shifted to have 16;
- // that way we don't need to shift inside the loop.
- temp = j->code_buffer >> 16;
- for (k=FAST_BITS+1 ; ; ++k)
- if (temp < h->maxcode[k])
- break;
- if (k == 17) {
- // error! code not found
- j->code_bits -= 16;
- return -1;
- }
-
- if (k > j->code_bits)
- return -1;
-
- // convert the huffman code to the symbol id
- c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k];
- assert((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]);
-
- // convert the id to a symbol
- j->code_bits -= k;
- j->code_buffer <<= k;
- return h->values[c];
-}
-
-// combined JPEG 'receive' and JPEG 'extend', since baseline
-// always extends everything it receives.
-stbi_inline static int stbi__extend_receive(stbi__jpeg *j, int n)
-{
- unsigned int m = 1 << (n-1);
- unsigned int k;
- if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
-
- #if 1
- k = stbi_lrot(j->code_buffer, n);
- j->code_buffer = k & ~stbi__bmask[n];
- k &= stbi__bmask[n];
- j->code_bits -= n;
- #else
- k = (j->code_buffer >> (32 - n)) & stbi__bmask[n];
- j->code_bits -= n;
- j->code_buffer <<= n;
- #endif
- // the following test is probably a random branch that won't
- // predict well. I tried to table accelerate it but failed.
- // maybe it's compiling as a conditional move?
- if (k < m)
- return (-1 << n) + k + 1;
- else
- return k;
-}
-
-// given a value that's at position X in the zigzag stream,
-// where does it appear in the 8x8 matrix coded as row-major?
-static stbi_uc stbi__jpeg_dezigzag[64+15] =
-{
- 0, 1, 8, 16, 9, 2, 3, 10,
- 17, 24, 32, 25, 18, 11, 4, 5,
- 12, 19, 26, 33, 40, 48, 41, 34,
- 27, 20, 13, 6, 7, 14, 21, 28,
- 35, 42, 49, 56, 57, 50, 43, 36,
- 29, 22, 15, 23, 30, 37, 44, 51,
- 58, 59, 52, 45, 38, 31, 39, 46,
- 53, 60, 61, 54, 47, 55, 62, 63,
- // let corrupt input sample past end
- 63, 63, 63, 63, 63, 63, 63, 63,
- 63, 63, 63, 63, 63, 63, 63
-};
-
-// stbi__jpeg_huff_decode one 64-entry block--
-static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, int b)
-{
- int diff,dc,k;
- int t = stbi__jpeg_huff_decode(j, hdc);
- if (t < 0) return stbi__err("bad huffman code","Corrupt JPEG");
-
- // 0 all the ac values now so we can do it 32-bits at a time
- memset(data,0,64*sizeof(data[0]));
-
- diff = t ? stbi__extend_receive(j, t) : 0;
- dc = j->img_comp[b].dc_pred + diff;
- j->img_comp[b].dc_pred = dc;
- data[0] = (short) dc;
-
- // stbi__jpeg_huff_decode AC components, see JPEG spec
- k = 1;
- do {
- int r,s;
- int rs = stbi__jpeg_huff_decode(j, hac);
- if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
- s = rs & 15;
- r = rs >> 4;
- if (s == 0) {
- if (rs != 0xf0) break; // end block
- k += 16;
- } else {
- k += r;
- // stbi__jpeg_huff_decode into unzigzag'd location
- data[stbi__jpeg_dezigzag[k++]] = (short) stbi__extend_receive(j,s);
- }
- } while (k < 64);
- return 1;
-}
-
-// take a -128..127 value and stbi__clamp it and convert to 0..255
-stbi_inline static stbi_uc stbi__clamp(int x)
-{
- // trick to use a single test to catch both cases
- if ((unsigned int) x > 255) {
- if (x < 0) return 0;
- if (x > 255) return 255;
- }
- return (stbi_uc) x;
-}
-
-#define stbi__f2f(x) (int) (((x) * 4096 + 0.5))
-#define stbi__fsh(x) ((x) << 12)
-
-// derived from jidctint -- DCT_ISLOW
-#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \
- int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \
- p2 = s2; \
- p3 = s6; \
- p1 = (p2+p3) * stbi__f2f(0.5411961f); \
- t2 = p1 + p3*stbi__f2f(-1.847759065f); \
- t3 = p1 + p2*stbi__f2f( 0.765366865f); \
- p2 = s0; \
- p3 = s4; \
- t0 = stbi__fsh(p2+p3); \
- t1 = stbi__fsh(p2-p3); \
- x0 = t0+t3; \
- x3 = t0-t3; \
- x1 = t1+t2; \
- x2 = t1-t2; \
- t0 = s7; \
- t1 = s5; \
- t2 = s3; \
- t3 = s1; \
- p3 = t0+t2; \
- p4 = t1+t3; \
- p1 = t0+t3; \
- p2 = t1+t2; \
- p5 = (p3+p4)*stbi__f2f( 1.175875602f); \
- t0 = t0*stbi__f2f( 0.298631336f); \
- t1 = t1*stbi__f2f( 2.053119869f); \
- t2 = t2*stbi__f2f( 3.072711026f); \
- t3 = t3*stbi__f2f( 1.501321110f); \
- p1 = p5 + p1*stbi__f2f(-0.899976223f); \
- p2 = p5 + p2*stbi__f2f(-2.562915447f); \
- p3 = p3*stbi__f2f(-1.961570560f); \
- p4 = p4*stbi__f2f(-0.390180644f); \
- t3 += p1+p4; \
- t2 += p2+p3; \
- t1 += p2+p4; \
- t0 += p1+p3;
-
-#ifdef STBI_SIMD
-typedef unsigned short stbi_dequantize_t;
-#else
-typedef stbi_uc stbi_dequantize_t;
-#endif
-
-// .344 seconds on 3*anemones.jpg
-static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64], stbi_dequantize_t *dequantize)
-{
- int i,val[64],*v=val;
- stbi_dequantize_t *dq = dequantize;
- stbi_uc *o;
- short *d = data;
-
- // columns
- for (i=0; i < 8; ++i,++d,++dq, ++v) {
- // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing
- if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0
- && d[40]==0 && d[48]==0 && d[56]==0) {
- // no shortcut 0 seconds
- // (1|2|3|4|5|6|7)==0 0 seconds
- // all separate -0.047 seconds
- // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds
- int dcterm = d[0] * dq[0] << 2;
- v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm;
- } else {
- STBI__IDCT_1D(d[ 0]*dq[ 0],d[ 8]*dq[ 8],d[16]*dq[16],d[24]*dq[24],
- d[32]*dq[32],d[40]*dq[40],d[48]*dq[48],d[56]*dq[56])
- // constants scaled things up by 1<<12; let's bring them back
- // down, but keep 2 extra bits of precision
- x0 += 512; x1 += 512; x2 += 512; x3 += 512;
- v[ 0] = (x0+t3) >> 10;
- v[56] = (x0-t3) >> 10;
- v[ 8] = (x1+t2) >> 10;
- v[48] = (x1-t2) >> 10;
- v[16] = (x2+t1) >> 10;
- v[40] = (x2-t1) >> 10;
- v[24] = (x3+t0) >> 10;
- v[32] = (x3-t0) >> 10;
- }
- }
-
- for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) {
- // no fast case since the first 1D IDCT spread components out
- STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7])
- // constants scaled things up by 1<<12, plus we had 1<<2 from first
- // loop, plus horizontal and vertical each scale by sqrt(8) so together
- // we've got an extra 1<<3, so 1<<17 total we need to remove.
- // so we want to round that, which means adding 0.5 * 1<<17,
- // aka 65536. Also, we'll end up with -128 to 127 that we want
- // to encode as 0..255 by adding 128, so we'll add that before the shift
- x0 += 65536 + (128<<17);
- x1 += 65536 + (128<<17);
- x2 += 65536 + (128<<17);
- x3 += 65536 + (128<<17);
- // tried computing the shifts into temps, or'ing the temps to see
- // if any were out of range, but that was slower
- o[0] = stbi__clamp((x0+t3) >> 17);
- o[7] = stbi__clamp((x0-t3) >> 17);
- o[1] = stbi__clamp((x1+t2) >> 17);
- o[6] = stbi__clamp((x1-t2) >> 17);
- o[2] = stbi__clamp((x2+t1) >> 17);
- o[5] = stbi__clamp((x2-t1) >> 17);
- o[3] = stbi__clamp((x3+t0) >> 17);
- o[4] = stbi__clamp((x3-t0) >> 17);
- }
-}
-
-#ifdef STBI_SIMD
-static stbi_idct_8x8 stbi__idct_installed = stbi__idct_block;
-
-STBIDEF void stbi_install_idct(stbi_idct_8x8 func)
-{
- stbi__idct_installed = func;
-}
-#endif
-
-#define STBI__MARKER_none 0xff
-// if there's a pending marker from the entropy stream, return that
-// otherwise, fetch from the stream and get a marker. if there's no
-// marker, return 0xff, which is never a valid marker value
-static stbi_uc stbi__get_marker(stbi__jpeg *j)
-{
- stbi_uc x;
- if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; }
- x = stbi__get8(j->s);
- if (x != 0xff) return STBI__MARKER_none;
- while (x == 0xff)
- x = stbi__get8(j->s);
- return x;
-}
-
-// in each scan, we'll have scan_n components, and the order
-// of the components is specified by order[]
-#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7)
-
-// after a restart interval, stbi__jpeg_reset the entropy decoder and
-// the dc prediction
-static void stbi__jpeg_reset(stbi__jpeg *j)
-{
- j->code_bits = 0;
- j->code_buffer = 0;
- j->nomore = 0;
- j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = 0;
- j->marker = STBI__MARKER_none;
- j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff;
- // no more than 1<<31 MCUs if no restart_interal? that's plenty safe,
- // since we don't even allow 1<<30 pixels
-}
-
-static int stbi__parse_entropy_coded_data(stbi__jpeg *z)
-{
- stbi__jpeg_reset(z);
- if (z->scan_n == 1) {
- int i,j;
- #ifdef STBI_SIMD
- __declspec(align(16))
- #endif
- short data[64];
- int n = z->order[0];
- // non-interleaved data, we just need to process one block at a time,
- // in trivial scanline order
- // number of blocks to do just depends on how many actual "pixels" this
- // component has, independent of interleaved MCU blocking and such
- int w = (z->img_comp[n].x+7) >> 3;
- int h = (z->img_comp[n].y+7) >> 3;
- for (j=0; j < h; ++j) {
- for (i=0; i < w; ++i) {
- if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+z->img_comp[n].ha, n)) return 0;
- #ifdef STBI_SIMD
- stbi__idct_installed(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data, z->dequant2[z->img_comp[n].tq]);
- #else
- stbi__idct_block(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data, z->dequant[z->img_comp[n].tq]);
- #endif
- // every data block is an MCU, so countdown the restart interval
- if (--z->todo <= 0) {
- if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
- // if it's NOT a restart, then just bail, so we get corrupt data
- // rather than no data
- if (!STBI__RESTART(z->marker)) return 1;
- stbi__jpeg_reset(z);
- }
- }
- }
- } else { // interleaved!
- int i,j,k,x,y;
- short data[64];
- for (j=0; j < z->img_mcu_y; ++j) {
- for (i=0; i < z->img_mcu_x; ++i) {
- // scan an interleaved mcu... process scan_n components in order
- for (k=0; k < z->scan_n; ++k) {
- int n = z->order[k];
- // scan out an mcu's worth of this component; that's just determined
- // by the basic H and V specified for the component
- for (y=0; y < z->img_comp[n].v; ++y) {
- for (x=0; x < z->img_comp[n].h; ++x) {
- int x2 = (i*z->img_comp[n].h + x)*8;
- int y2 = (j*z->img_comp[n].v + y)*8;
- if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+z->img_comp[n].ha, n)) return 0;
- #ifdef STBI_SIMD
- stbi__idct_installed(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data, z->dequant2[z->img_comp[n].tq]);
- #else
- stbi__idct_block(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data, z->dequant[z->img_comp[n].tq]);
- #endif
- }
- }
- }
- // after all interleaved components, that's an interleaved MCU,
- // so now count down the restart interval
- if (--z->todo <= 0) {
- if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
- // if it's NOT a restart, then just bail, so we get corrupt data
- // rather than no data
- if (!STBI__RESTART(z->marker)) return 1;
- stbi__jpeg_reset(z);
- }
- }
- }
- }
- return 1;
-}
-
-static int stbi__process_marker(stbi__jpeg *z, int m)
-{
- int L;
- switch (m) {
- case STBI__MARKER_none: // no marker found
- return stbi__err("expected marker","Corrupt JPEG");
-
- case 0xC2: // stbi__SOF - progressive
- return stbi__err("progressive jpeg","JPEG format not supported (progressive)");
-
- case 0xDD: // DRI - specify restart interval
- if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG");
- z->restart_interval = stbi__get16be(z->s);
- return 1;
-
- case 0xDB: // DQT - define quantization table
- L = stbi__get16be(z->s)-2;
- while (L > 0) {
- int q = stbi__get8(z->s);
- int p = q >> 4;
- int t = q & 15,i;
- if (p != 0) return stbi__err("bad DQT type","Corrupt JPEG");
- if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG");
- for (i=0; i < 64; ++i)
- z->dequant[t][stbi__jpeg_dezigzag[i]] = stbi__get8(z->s);
- #ifdef STBI_SIMD
- for (i=0; i < 64; ++i)
- z->dequant2[t][i] = z->dequant[t][i];
- #endif
- L -= 65;
- }
- return L==0;
-
- case 0xC4: // DHT - define huffman table
- L = stbi__get16be(z->s)-2;
- while (L > 0) {
- stbi_uc *v;
- int sizes[16],i,n=0;
- int q = stbi__get8(z->s);
- int tc = q >> 4;
- int th = q & 15;
- if (tc > 1 || th > 3) return stbi__err("bad DHT header","Corrupt JPEG");
- for (i=0; i < 16; ++i) {
- sizes[i] = stbi__get8(z->s);
- n += sizes[i];
- }
- L -= 17;
- if (tc == 0) {
- if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0;
- v = z->huff_dc[th].values;
- } else {
- if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0;
- v = z->huff_ac[th].values;
- }
- for (i=0; i < n; ++i)
- v[i] = stbi__get8(z->s);
- L -= n;
- }
- return L==0;
- }
- // check for comment block or APP blocks
- if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) {
- stbi__skip(z->s, stbi__get16be(z->s)-2);
- return 1;
- }
- return 0;
-}
-
-// after we see stbi__SOS
-static int stbi__process_scan_header(stbi__jpeg *z)
-{
- int i;
- int Ls = stbi__get16be(z->s);
- z->scan_n = stbi__get8(z->s);
- if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return stbi__err("bad stbi__SOS component count","Corrupt JPEG");
- if (Ls != 6+2*z->scan_n) return stbi__err("bad stbi__SOS len","Corrupt JPEG");
- for (i=0; i < z->scan_n; ++i) {
- int id = stbi__get8(z->s), which;
- int q = stbi__get8(z->s);
- for (which = 0; which < z->s->img_n; ++which)
- if (z->img_comp[which].id == id)
- break;
- if (which == z->s->img_n) return 0;
- z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG");
- z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG");
- z->order[i] = which;
- }
- if (stbi__get8(z->s) != 0) return stbi__err("bad stbi__SOS","Corrupt JPEG");
- stbi__get8(z->s); // should be 63, but might be 0
- if (stbi__get8(z->s) != 0) return stbi__err("bad stbi__SOS","Corrupt JPEG");
-
- return 1;
-}
-
-static int stbi__process_frame_header(stbi__jpeg *z, int scan)
-{
- stbi__context *s = z->s;
- int Lf,p,i,q, h_max=1,v_max=1,c;
- Lf = stbi__get16be(s); if (Lf < 11) return stbi__err("bad stbi__SOF len","Corrupt JPEG"); // JPEG
- p = stbi__get8(s); if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline
- s->img_y = stbi__get16be(s); if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG
- s->img_x = stbi__get16be(s); if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires
- c = stbi__get8(s);
- if (c != 3 && c != 1) return stbi__err("bad component count","Corrupt JPEG"); // JFIF requires
- s->img_n = c;
- for (i=0; i < c; ++i) {
- z->img_comp[i].data = NULL;
- z->img_comp[i].linebuf = NULL;
- }
-
- if (Lf != 8+3*s->img_n) return stbi__err("bad stbi__SOF len","Corrupt JPEG");
-
- for (i=0; i < s->img_n; ++i) {
- z->img_comp[i].id = stbi__get8(s);
- if (z->img_comp[i].id != i+1) // JFIF requires
- if (z->img_comp[i].id != i) // some version of jpegtran outputs non-JFIF-compliant files!
- return stbi__err("bad component ID","Corrupt JPEG");
- q = stbi__get8(s);
- z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG");
- z->img_comp[i].v = q & 15; if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG");
- z->img_comp[i].tq = stbi__get8(s); if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG");
- }
-
- if (scan != SCAN_load) return 1;
-
- if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to stbi__jpeg_huff_decode");
-
- for (i=0; i < s->img_n; ++i) {
- if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h;
- if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v;
- }
-
- // compute interleaved mcu info
- z->img_h_max = h_max;
- z->img_v_max = v_max;
- z->img_mcu_w = h_max * 8;
- z->img_mcu_h = v_max * 8;
- z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w;
- z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h;
-
- for (i=0; i < s->img_n; ++i) {
- // number of effective pixels (stbi__err.g. for non-interleaved MCU)
- z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max;
- z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max;
- // to simplify generation, we'll allocate enough memory to stbi__jpeg_huff_decode
- // the bogus oversized data from using interleaved MCUs and their
- // big blocks (stbi__err.g. a 16x16 iMCU on an image of width 33); we won't
- // discard the extra data until colorspace conversion
- z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8;
- z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8;
- z->img_comp[i].raw_data = malloc(z->img_comp[i].w2 * z->img_comp[i].h2+15);
- if (z->img_comp[i].raw_data == NULL) {
- for(--i; i >= 0; --i) {
- free(z->img_comp[i].raw_data);
- z->img_comp[i].data = NULL;
- }
- return stbi__err("outofmem", "Out of memory");
- }
- // align blocks for installable-idct using mmx/sse
- z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15);
- z->img_comp[i].linebuf = NULL;
- }
-
- return 1;
-}
-
-// use comparisons since in some cases we handle more than one case (stbi__err.g. stbi__SOF)
-#define stbi__DNL(x) ((x) == 0xdc)
-#define stbi__SOI(x) ((x) == 0xd8)
-#define stbi__EOI(x) ((x) == 0xd9)
-#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1)
-#define stbi__SOS(x) ((x) == 0xda)
-
-static int decode_jpeg_header(stbi__jpeg *z, int scan)
-{
- int m;
- z->marker = STBI__MARKER_none; // initialize cached marker to empty
- m = stbi__get_marker(z);
- if (!stbi__SOI(m)) return stbi__err("no stbi__SOI","Corrupt JPEG");
- if (scan == SCAN_type) return 1;
- m = stbi__get_marker(z);
- while (!stbi__SOF(m)) {
- if (!stbi__process_marker(z,m)) return 0;
- m = stbi__get_marker(z);
- while (m == STBI__MARKER_none) {
- // some files have extra padding after their blocks, so ok, we'll scan
- if (stbi__at_eof(z->s)) return stbi__err("no stbi__SOF", "Corrupt JPEG");
- m = stbi__get_marker(z);
- }
- }
- if (!stbi__process_frame_header(z, scan)) return 0;
- return 1;
-}
-
-static int decode_jpeg_image(stbi__jpeg *j)
-{
- int m;
- j->restart_interval = 0;
- if (!decode_jpeg_header(j, SCAN_load)) return 0;
- m = stbi__get_marker(j);
- while (!stbi__EOI(m)) {
- if (stbi__SOS(m)) {
- if (!stbi__process_scan_header(j)) return 0;
- if (!stbi__parse_entropy_coded_data(j)) return 0;
- if (j->marker == STBI__MARKER_none ) {
- // handle 0s at the end of image data from IP Kamera 9060
- while (!stbi__at_eof(j->s)) {
- int x = stbi__get8(j->s);
- if (x == 255) {
- j->marker = stbi__get8(j->s);
- break;
- } else if (x != 0) {
- return 0;
- }
- }
- // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0
- }
- } else {
- if (!stbi__process_marker(j, m)) return 0;
- }
- m = stbi__get_marker(j);
- }
- return 1;
-}
-
-// static jfif-centered resampling (across block boundaries)
-
-typedef stbi_uc *(*resample_row_func)(stbi_uc *out, stbi_uc *in0, stbi_uc *in1,
- int w, int hs);
-
-#define stbi__div4(x) ((stbi_uc) ((x) >> 2))
-
-static stbi_uc *resample_row_1(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
- STBI_NOTUSED(out);
- STBI_NOTUSED(in_far);
- STBI_NOTUSED(w);
- STBI_NOTUSED(hs);
- return in_near;
-}
-
-static stbi_uc* stbi__resample_row_v_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
- // need to generate two samples vertically for every one in input
- int i;
- STBI_NOTUSED(hs);
- for (i=0; i < w; ++i)
- out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2);
- return out;
-}
-
-static stbi_uc* stbi__resample_row_h_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
- // need to generate two samples horizontally for every one in input
- int i;
- stbi_uc *input = in_near;
-
- if (w == 1) {
- // if only one sample, can't do any interpolation
- out[0] = out[1] = input[0];
- return out;
- }
-
- out[0] = input[0];
- out[1] = stbi__div4(input[0]*3 + input[1] + 2);
- for (i=1; i < w-1; ++i) {
- int n = 3*input[i]+2;
- out[i*2+0] = stbi__div4(n+input[i-1]);
- out[i*2+1] = stbi__div4(n+input[i+1]);
- }
- out[i*2+0] = stbi__div4(input[w-2]*3 + input[w-1] + 2);
- out[i*2+1] = input[w-1];
-
- STBI_NOTUSED(in_far);
- STBI_NOTUSED(hs);
-
- return out;
-}
-
-#define stbi__div16(x) ((stbi_uc) ((x) >> 4))
-
-static stbi_uc *stbi__resample_row_hv_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
- // need to generate 2x2 samples for every one in input
- int i,t0,t1;
- if (w == 1) {
- out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
- return out;
- }
-
- t1 = 3*in_near[0] + in_far[0];
- out[0] = stbi__div4(t1+2);
- for (i=1; i < w; ++i) {
- t0 = t1;
- t1 = 3*in_near[i]+in_far[i];
- out[i*2-1] = stbi__div16(3*t0 + t1 + 8);
- out[i*2 ] = stbi__div16(3*t1 + t0 + 8);
- }
- out[w*2-1] = stbi__div4(t1+2);
-
- STBI_NOTUSED(hs);
-
- return out;
-}
-
-static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
- // resample with nearest-neighbor
- int i,j;
- STBI_NOTUSED(in_far);
- for (i=0; i < w; ++i)
- for (j=0; j < hs; ++j)
- out[i*hs+j] = in_near[i];
- return out;
-}
-
-#define float2fixed(x) ((int) ((x) * 65536 + 0.5))
-
-// 0.38 seconds on 3*anemones.jpg (0.25 with processor = Pro)
-// VC6 without processor=Pro is generating multiple LEAs per multiply!
-static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step)
-{
- int i;
- for (i=0; i < count; ++i) {
- int y_fixed = (y[i] << 16) + 32768; // rounding
- int r,g,b;
- int cr = pcr[i] - 128;
- int cb = pcb[i] - 128;
- r = y_fixed + cr*float2fixed(1.40200f);
- g = y_fixed - cr*float2fixed(0.71414f) - cb*float2fixed(0.34414f);
- b = y_fixed + cb*float2fixed(1.77200f);
- r >>= 16;
- g >>= 16;
- b >>= 16;
- if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
- if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
- if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
- out[0] = (stbi_uc)r;
- out[1] = (stbi_uc)g;
- out[2] = (stbi_uc)b;
- out[3] = 255;
- out += step;
- }
-}
-
-#ifdef STBI_SIMD
-static stbi_YCbCr_to_RGB_run stbi__YCbCr_installed = stbi__YCbCr_to_RGB_row;
-
-STBIDEF void stbi_install_YCbCr_to_RGB(stbi_YCbCr_to_RGB_run func)
-{
- stbi__YCbCr_installed = func;
-}
-#endif
-
-
-// clean up the temporary component buffers
-static void stbi__cleanup_jpeg(stbi__jpeg *j)
-{
- int i;
- for (i=0; i < j->s->img_n; ++i) {
- if (j->img_comp[i].data) {
- free(j->img_comp[i].raw_data);
- j->img_comp[i].data = NULL;
- }
- if (j->img_comp[i].linebuf) {
- free(j->img_comp[i].linebuf);
- j->img_comp[i].linebuf = NULL;
- }
- }
-}
-
-typedef struct
-{
- resample_row_func resample;
- stbi_uc *line0,*line1;
- int hs,vs; // expansion factor in each axis
- int w_lores; // horizontal pixels pre-expansion
- int ystep; // how far through vertical expansion we are
- int ypos; // which pre-expansion row we're on
-} stbi__resample;
-
-static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp)
-{
- int n, decode_n;
- // validate req_comp
- if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
- z->s->img_n = 0;
-
- // load a jpeg image from whichever source
- if (!decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; }
-
- // determine actual number of components to generate
- n = req_comp ? req_comp : z->s->img_n;
-
- if (z->s->img_n == 3 && n < 3)
- decode_n = 1;
- else
- decode_n = z->s->img_n;
-
- // resample and color-convert
- {
- int k;
- unsigned int i,j;
- stbi_uc *output;
- stbi_uc *coutput[4];
-
- stbi__resample res_comp[4];
-
- for (k=0; k < decode_n; ++k) {
- stbi__resample *r = &res_comp[k];
-
- // allocate line buffer big enough for upsampling off the edges
- // with upsample factor of 4
- z->img_comp[k].linebuf = (stbi_uc *) malloc(z->s->img_x + 3);
- if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
-
- r->hs = z->img_h_max / z->img_comp[k].h;
- r->vs = z->img_v_max / z->img_comp[k].v;
- r->ystep = r->vs >> 1;
- r->w_lores = (z->s->img_x + r->hs-1) / r->hs;
- r->ypos = 0;
- r->line0 = r->line1 = z->img_comp[k].data;
-
- if (r->hs == 1 && r->vs == 1) r->resample = resample_row_1;
- else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2;
- else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2;
- else if (r->hs == 2 && r->vs == 2) r->resample = stbi__resample_row_hv_2;
- else r->resample = stbi__resample_row_generic;
- }
-
- // can't error after this so, this is safe
- output = (stbi_uc *) malloc(n * z->s->img_x * z->s->img_y + 1);
- if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
-
- // now go ahead and resample
- for (j=0; j < z->s->img_y; ++j) {
- stbi_uc *out = output + n * z->s->img_x * j;
- for (k=0; k < decode_n; ++k) {
- stbi__resample *r = &res_comp[k];
- int y_bot = r->ystep >= (r->vs >> 1);
- coutput[k] = r->resample(z->img_comp[k].linebuf,
- y_bot ? r->line1 : r->line0,
- y_bot ? r->line0 : r->line1,
- r->w_lores, r->hs);
- if (++r->ystep >= r->vs) {
- r->ystep = 0;
- r->line0 = r->line1;
- if (++r->ypos < z->img_comp[k].y)
- r->line1 += z->img_comp[k].w2;
- }
- }
- if (n >= 3) {
- stbi_uc *y = coutput[0];
- if (z->s->img_n == 3) {
- #ifdef STBI_SIMD
- stbi__YCbCr_installed(out, y, coutput[1], coutput[2], z->s->img_x, n);
- #else
- stbi__YCbCr_to_RGB_row(out, y, coutput[1], coutput[2], z->s->img_x, n);
- #endif
- } else
- for (i=0; i < z->s->img_x; ++i) {
- out[0] = out[1] = out[2] = y[i];
- out[3] = 255; // not used if n==3
- out += n;
- }
- } else {
- stbi_uc *y = coutput[0];
- if (n == 1)
- for (i=0; i < z->s->img_x; ++i) out[i] = y[i];
- else
- for (i=0; i < z->s->img_x; ++i) *out++ = y[i], *out++ = 255;
- }
- }
- stbi__cleanup_jpeg(z);
- *out_x = z->s->img_x;
- *out_y = z->s->img_y;
- if (comp) *comp = z->s->img_n; // report original components, not output
- return output;
- }
-}
-
-static unsigned char *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
- stbi__jpeg j;
- j.s = s;
- return load_jpeg_image(&j, x,y,comp,req_comp);
-}
-
-static int stbi__jpeg_test(stbi__context *s)
-{
- int r;
- stbi__jpeg j;
- j.s = s;
- r = decode_jpeg_header(&j, SCAN_type);
- stbi__rewind(s);
- return r;
-}
-
-static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp)
-{
- if (!decode_jpeg_header(j, SCAN_header)) {
- stbi__rewind( j->s );
- return 0;
- }
- if (x) *x = j->s->img_x;
- if (y) *y = j->s->img_y;
- if (comp) *comp = j->s->img_n;
- return 1;
-}
-
-static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp)
-{
- stbi__jpeg j;
- j.s = s;
- return stbi__jpeg_info_raw(&j, x, y, comp);
-}
-
-// public domain zlib stbi__jpeg_huff_decode v0.2 Sean Barrett 2006-11-18
-// simple implementation
-// - all input must be provided in an upfront buffer
-// - all output is written to a single output buffer (can malloc/realloc)
-// performance
-// - fast huffman
-
-// fast-way is faster to check than jpeg huffman, but slow way is slower
-#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables
-#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1)
-
-// zlib-style huffman encoding
-// (jpegs packs from left, zlib from right, so can't share code)
-typedef struct
-{
- stbi__uint16 fast[1 << STBI__ZFAST_BITS];
- stbi__uint16 firstcode[16];
- int maxcode[17];
- stbi__uint16 firstsymbol[16];
- stbi_uc size[288];
- stbi__uint16 value[288];
-} stbi__zhuffman;
-
-stbi_inline static int stbi__bitreverse16(int n)
-{
- n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1);
- n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2);
- n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4);
- n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8);
- return n;
-}
-
-stbi_inline static int stbi__bit_reverse(int v, int bits)
-{
- assert(bits <= 16);
- // to bit reverse n bits, reverse 16 and shift
- // stbi__err.g. 11 bits, bit reverse and shift away 5
- return stbi__bitreverse16(v) >> (16-bits);
-}
-
-static int stbi__zbuild_huffman(stbi__zhuffman *z, stbi_uc *sizelist, int num)
-{
- int i,k=0;
- int code, next_code[16], sizes[17];
-
- // DEFLATE spec for generating codes
- memset(sizes, 0, sizeof(sizes));
- memset(z->fast, 255, sizeof(z->fast));
- for (i=0; i < num; ++i)
- ++sizes[sizelist[i]];
- sizes[0] = 0;
- for (i=1; i < 16; ++i)
- assert(sizes[i] <= (1 << i));
- code = 0;
- for (i=1; i < 16; ++i) {
- next_code[i] = code;
- z->firstcode[i] = (stbi__uint16) code;
- z->firstsymbol[i] = (stbi__uint16) k;
- code = (code + sizes[i]);
- if (sizes[i])
- if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt JPEG");
- z->maxcode[i] = code << (16-i); // preshift for inner loop
- code <<= 1;
- k += sizes[i];
- }
- z->maxcode[16] = 0x10000; // sentinel
- for (i=0; i < num; ++i) {
- int s = sizelist[i];
- if (s) {
- int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
- z->size [c] = (stbi_uc ) s;
- z->value[c] = (stbi__uint16) i;
- if (s <= STBI__ZFAST_BITS) {
- int k = stbi__bit_reverse(next_code[s],s);
- while (k < (1 << STBI__ZFAST_BITS)) {
- z->fast[k] = (stbi__uint16) c;
- k += (1 << s);
- }
- }
- ++next_code[s];
- }
- }
- return 1;
-}
-
-// zlib-from-memory implementation for PNG reading
-// because PNG allows splitting the zlib stream arbitrarily,
-// and it's annoying structurally to have PNG call ZLIB call PNG,
-// we require PNG read all the IDATs and combine them into a single
-// memory buffer
-
-typedef struct
-{
- stbi_uc *zbuffer, *zbuffer_end;
- int num_bits;
- stbi__uint32 code_buffer;
-
- char *zout;
- char *zout_start;
- char *zout_end;
- int z_expandable;
-
- stbi__zhuffman z_length, z_distance;
-} stbi__zbuf;
-
-stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z)
-{
- if (z->zbuffer >= z->zbuffer_end) return 0;
- return *z->zbuffer++;
-}
-
-static void stbi__fill_bits(stbi__zbuf *z)
-{
- do {
- assert(z->code_buffer < (1U << z->num_bits));
- z->code_buffer |= stbi__zget8(z) << z->num_bits;
- z->num_bits += 8;
- } while (z->num_bits <= 24);
-}
-
-stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n)
-{
- unsigned int k;
- if (z->num_bits < n) stbi__fill_bits(z);
- k = z->code_buffer & ((1 << n) - 1);
- z->code_buffer >>= n;
- z->num_bits -= n;
- return k;
-}
-
-stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z)
-{
- int b,s,k;
- if (a->num_bits < 16) stbi__fill_bits(a);
- b = z->fast[a->code_buffer & STBI__ZFAST_MASK];
- if (b < 0xffff) {
- s = z->size[b];
- a->code_buffer >>= s;
- a->num_bits -= s;
- return z->value[b];
- }
-
- // not resolved by fast table, so compute it the slow way
- // use jpeg approach, which requires MSbits at top
- k = stbi__bit_reverse(a->code_buffer, 16);
- for (s=STBI__ZFAST_BITS+1; ; ++s)
- if (k < z->maxcode[s])
- break;
- if (s == 16) return -1; // invalid code!
- // code size is s, so:
- b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s];
- assert(z->size[b] == s);
- a->code_buffer >>= s;
- a->num_bits -= s;
- return z->value[b];
-}
-
-static int stbi__zexpand(stbi__zbuf *z, int n) // need to make room for n bytes
-{
- char *q;
- int cur, limit;
- if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG");
- cur = (int) (z->zout - z->zout_start);
- limit = (int) (z->zout_end - z->zout_start);
- while (cur + n > limit)
- limit *= 2;
- q = (char *) realloc(z->zout_start, limit);
- if (q == NULL) return stbi__err("outofmem", "Out of memory");
- z->zout_start = q;
- z->zout = q + cur;
- z->zout_end = q + limit;
- return 1;
-}
-
-static int stbi__zlength_base[31] = {
- 3,4,5,6,7,8,9,10,11,13,
- 15,17,19,23,27,31,35,43,51,59,
- 67,83,99,115,131,163,195,227,258,0,0 };
-
-static int stbi__zlength_extra[31]=
-{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 };
-
-static int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,
-257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0};
-
-static int stbi__zdist_extra[32] =
-{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
-
-static int stbi__parse_huffman_block(stbi__zbuf *a)
-{
- for(;;) {
- int z = stbi__zhuffman_decode(a, &a->z_length);
- if (z < 256) {
- if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes
- if (a->zout >= a->zout_end) if (!stbi__zexpand(a, 1)) return 0;
- *a->zout++ = (char) z;
- } else {
- stbi_uc *p;
- int len,dist;
- if (z == 256) return 1;
- z -= 257;
- len = stbi__zlength_base[z];
- if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]);
- z = stbi__zhuffman_decode(a, &a->z_distance);
- if (z < 0) return stbi__err("bad huffman code","Corrupt PNG");
- dist = stbi__zdist_base[z];
- if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]);
- if (a->zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG");
- if (a->zout + len > a->zout_end) if (!stbi__zexpand(a, len)) return 0;
- p = (stbi_uc *) (a->zout - dist);
- while (len--)
- *a->zout++ = *p++;
- }
- }
-}
-
-static int stbi__compute_huffman_codes(stbi__zbuf *a)
-{
- static stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 };
- stbi__zhuffman z_codelength;
- stbi_uc lencodes[286+32+137];//padding for maximum single op
- stbi_uc codelength_sizes[19];
- int i,n;
-
- int hlit = stbi__zreceive(a,5) + 257;
- int hdist = stbi__zreceive(a,5) + 1;
- int hclen = stbi__zreceive(a,4) + 4;
-
- memset(codelength_sizes, 0, sizeof(codelength_sizes));
- for (i=0; i < hclen; ++i) {
- int s = stbi__zreceive(a,3);
- codelength_sizes[length_dezigzag[i]] = (stbi_uc) s;
- }
- if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0;
-
- n = 0;
- while (n < hlit + hdist) {
- int c = stbi__zhuffman_decode(a, &z_codelength);
- assert(c >= 0 && c < 19);
- if (c < 16)
- lencodes[n++] = (stbi_uc) c;
- else if (c == 16) {
- c = stbi__zreceive(a,2)+3;
- memset(lencodes+n, lencodes[n-1], c);
- n += c;
- } else if (c == 17) {
- c = stbi__zreceive(a,3)+3;
- memset(lencodes+n, 0, c);
- n += c;
- } else {
- assert(c == 18);
- c = stbi__zreceive(a,7)+11;
- memset(lencodes+n, 0, c);
- n += c;
- }
- }
- if (n != hlit+hdist) return stbi__err("bad codelengths","Corrupt PNG");
- if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0;
- if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0;
- return 1;
-}
-
-static int stbi__parse_uncomperssed_block(stbi__zbuf *a)
-{
- stbi_uc header[4];
- int len,nlen,k;
- if (a->num_bits & 7)
- stbi__zreceive(a, a->num_bits & 7); // discard
- // drain the bit-packed data into header
- k = 0;
- while (a->num_bits > 0) {
- header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check
- a->code_buffer >>= 8;
- a->num_bits -= 8;
- }
- assert(a->num_bits == 0);
- // now fill header the normal way
- while (k < 4)
- header[k++] = stbi__zget8(a);
- len = header[1] * 256 + header[0];
- nlen = header[3] * 256 + header[2];
- if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG");
- if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG");
- if (a->zout + len > a->zout_end)
- if (!stbi__zexpand(a, len)) return 0;
- memcpy(a->zout, a->zbuffer, len);
- a->zbuffer += len;
- a->zout += len;
- return 1;
-}
-
-static int stbi__parse_zlib_header(stbi__zbuf *a)
-{
- int cmf = stbi__zget8(a);
- int cm = cmf & 15;
- /* int cinfo = cmf >> 4; */
- int flg = stbi__zget8(a);
- if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec
- if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png
- if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png
- // window = 1 << (8 + cinfo)... but who cares, we fully buffer output
- return 1;
-}
-
-// @TODO: should statically initialize these for optimal thread safety
-static stbi_uc stbi__zdefault_length[288], stbi__zdefault_distance[32];
-static void stbi__init_zdefaults(void)
-{
- int i; // use <= to match clearly with spec
- for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8;
- for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9;
- for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7;
- for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8;
-
- for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5;
-}
-
-static int stbi__parse_zlib(stbi__zbuf *a, int parse_header)
-{
- int final, type;
- if (parse_header)
- if (!stbi__parse_zlib_header(a)) return 0;
- a->num_bits = 0;
- a->code_buffer = 0;
- do {
- final = stbi__zreceive(a,1);
- type = stbi__zreceive(a,2);
- if (type == 0) {
- if (!stbi__parse_uncomperssed_block(a)) return 0;
- } else if (type == 3) {
- return 0;
- } else {
- if (type == 1) {
- // use fixed code lengths
- if (!stbi__zdefault_distance[31]) stbi__init_zdefaults();
- if (!stbi__zbuild_huffman(&a->z_length , stbi__zdefault_length , 288)) return 0;
- if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0;
- } else {
- if (!stbi__compute_huffman_codes(a)) return 0;
- }
- if (!stbi__parse_huffman_block(a)) return 0;
- }
- } while (!final);
- return 1;
-}
-
-static int stbi__do_zlib(stbi__zbuf *a, char *obuf, int olen, int exp, int parse_header)
-{
- a->zout_start = obuf;
- a->zout = obuf;
- a->zout_end = obuf + olen;
- a->z_expandable = exp;
-
- return stbi__parse_zlib(a, parse_header);
-}
-
-STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen)
-{
- stbi__zbuf a;
- char *p = (char *) malloc(initial_size);
- if (p == NULL) return NULL;
- a.zbuffer = (stbi_uc *) buffer;
- a.zbuffer_end = (stbi_uc *) buffer + len;
- if (stbi__do_zlib(&a, p, initial_size, 1, 1)) {
- if (outlen) *outlen = (int) (a.zout - a.zout_start);
- return a.zout_start;
- } else {
- free(a.zout_start);
- return NULL;
- }
-}
-
-STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
-{
- return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen);
-}
-
-STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header)
-{
- stbi__zbuf a;
- char *p = (char *) malloc(initial_size);
- if (p == NULL) return NULL;
- a.zbuffer = (stbi_uc *) buffer;
- a.zbuffer_end = (stbi_uc *) buffer + len;
- if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) {
- if (outlen) *outlen = (int) (a.zout - a.zout_start);
- return a.zout_start;
- } else {
- free(a.zout_start);
- return NULL;
- }
-}
-
-STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
-{
- stbi__zbuf a;
- a.zbuffer = (stbi_uc *) ibuffer;
- a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
- if (stbi__do_zlib(&a, obuffer, olen, 0, 1))
- return (int) (a.zout - a.zout_start);
- else
- return -1;
-}
-
-STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
-{
- stbi__zbuf a;
- char *p = (char *) malloc(16384);
- if (p == NULL) return NULL;
- a.zbuffer = (stbi_uc *) buffer;
- a.zbuffer_end = (stbi_uc *) buffer+len;
- if (stbi__do_zlib(&a, p, 16384, 1, 0)) {
- if (outlen) *outlen = (int) (a.zout - a.zout_start);
- return a.zout_start;
- } else {
- free(a.zout_start);
- return NULL;
- }
-}
-
-STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
-{
- stbi__zbuf a;
- a.zbuffer = (stbi_uc *) ibuffer;
- a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
- if (stbi__do_zlib(&a, obuffer, olen, 0, 0))
- return (int) (a.zout - a.zout_start);
- else
- return -1;
-}
-
-// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18
-// simple implementation
-// - only 8-bit samples
-// - no CRC checking
-// - allocates lots of intermediate memory
-// - avoids problem of streaming data between subsystems
-// - avoids explicit window management
-// performance
-// - uses stb_zlib, a PD zlib implementation with fast huffman decoding
-
-
-typedef struct
-{
- stbi__uint32 length;
- stbi__uint32 type;
-} stbi__pngchunk;
-
-#define PNG_TYPE(a,b,c,d) (((a) << 24) + ((b) << 16) + ((c) << 8) + (d))
-
-static stbi__pngchunk stbi__get_chunk_header(stbi__context *s)
-{
- stbi__pngchunk c;
- c.length = stbi__get32be(s);
- c.type = stbi__get32be(s);
- return c;
-}
-
-static int stbi__check_png_header(stbi__context *s)
-{
- static stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 };
- int i;
- for (i=0; i < 8; ++i)
- if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG");
- return 1;
-}
-
-typedef struct
-{
- stbi__context *s;
- stbi_uc *idata, *expanded, *out;
-} stbi__png;
-
-
-enum {
- STBI__F_none=0, STBI__F_sub=1, STBI__F_up=2, STBI__F_avg=3, STBI__F_paeth=4,
- STBI__F_avg_first, STBI__F_paeth_first
-};
-
-static stbi_uc first_row_filter[5] =
-{
- STBI__F_none, STBI__F_sub, STBI__F_none, STBI__F_avg_first, STBI__F_paeth_first
-};
-
-static int stbi__paeth(int a, int b, int c)
-{
- int p = a + b - c;
- int pa = abs(p-a);
- int pb = abs(p-b);
- int pc = abs(p-c);
- if (pa <= pb && pa <= pc) return a;
- if (pb <= pc) return b;
- return c;
-}
-
-#define STBI__BYTECAST(x) ((stbi_uc) ((x) & 255)) // truncate int to byte without warnings
-
-// create the png data from post-deflated data
-static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y)
-{
- stbi__context *s = a->s;
- stbi__uint32 i,j,stride = x*out_n;
- int k;
- int img_n = s->img_n; // copy it into a local for later
- assert(out_n == s->img_n || out_n == s->img_n+1);
- a->out = (stbi_uc *) malloc(x * y * out_n);
- if (!a->out) return stbi__err("outofmem", "Out of memory");
- if (s->img_x == x && s->img_y == y) {
- if (raw_len != (img_n * x + 1) * y) return stbi__err("not enough pixels","Corrupt PNG");
- } else { // interlaced:
- if (raw_len < (img_n * x + 1) * y) return stbi__err("not enough pixels","Corrupt PNG");
- }
- for (j=0; j < y; ++j) {
- stbi_uc *cur = a->out + stride*j;
- stbi_uc *prior = cur - stride;
- int filter = *raw++;
- if (filter > 4) return stbi__err("invalid filter","Corrupt PNG");
- // if first row, use special filter that doesn't sample previous row
- if (j == 0) filter = first_row_filter[filter];
- // handle first pixel explicitly
- for (k=0; k < img_n; ++k) {
- switch (filter) {
- case STBI__F_none : cur[k] = raw[k]; break;
- case STBI__F_sub : cur[k] = raw[k]; break;
- case STBI__F_up : cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break;
- case STBI__F_avg : cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1)); break;
- case STBI__F_paeth : cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0,prior[k],0)); break;
- case STBI__F_avg_first : cur[k] = raw[k]; break;
- case STBI__F_paeth_first: cur[k] = raw[k]; break;
- }
- }
- if (img_n != out_n) cur[img_n] = 255;
- raw += img_n;
- cur += out_n;
- prior += out_n;
- // this is a little gross, so that we don't switch per-pixel or per-component
- if (img_n == out_n) {
- #define CASE(f) \
- case f: \
- for (i=x-1; i >= 1; --i, raw+=img_n,cur+=img_n,prior+=img_n) \
- for (k=0; k < img_n; ++k)
- switch (filter) {
- CASE(STBI__F_none) cur[k] = raw[k]; break;
- CASE(STBI__F_sub) cur[k] = STBI__BYTECAST(raw[k] + cur[k-img_n]); break;
- CASE(STBI__F_up) cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break;
- CASE(STBI__F_avg) cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-img_n])>>1)); break;
- CASE(STBI__F_paeth) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-img_n],prior[k],prior[k-img_n])); break;
- CASE(STBI__F_avg_first) cur[k] = STBI__BYTECAST(raw[k] + (cur[k-img_n] >> 1)); break;
- CASE(STBI__F_paeth_first) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-img_n],0,0)); break;
- }
- #undef CASE
- } else {
- assert(img_n+1 == out_n);
- #define CASE(f) \
- case f: \
- for (i=x-1; i >= 1; --i, cur[img_n]=255,raw+=img_n,cur+=out_n,prior+=out_n) \
- for (k=0; k < img_n; ++k)
- switch (filter) {
- CASE(STBI__F_none) cur[k] = raw[k]; break;
- CASE(STBI__F_sub) cur[k] = STBI__BYTECAST(raw[k] + cur[k-out_n]); break;
- CASE(STBI__F_up) cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break;
- CASE(STBI__F_avg) cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-out_n])>>1)); break;
- CASE(STBI__F_paeth) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-out_n],prior[k],prior[k-out_n])); break;
- CASE(STBI__F_avg_first) cur[k] = STBI__BYTECAST(raw[k] + (cur[k-out_n] >> 1)); break;
- CASE(STBI__F_paeth_first) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-out_n],0,0)); break;
- }
- #undef CASE
- }
- }
- return 1;
-}
-
-static int stbi__create_png_image(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, int interlaced)
-{
- stbi_uc *final;
- int p;
- if (!interlaced)
- return stbi__create_png_image_raw(a, raw, raw_len, out_n, a->s->img_x, a->s->img_y);
-
- // de-interlacing
- final = (stbi_uc *) malloc(a->s->img_x * a->s->img_y * out_n);
- for (p=0; p < 7; ++p) {
- int xorig[] = { 0,4,0,2,0,1,0 };
- int yorig[] = { 0,0,4,0,2,0,1 };
- int xspc[] = { 8,8,4,4,2,2,1 };
- int yspc[] = { 8,8,8,4,4,2,2 };
- int i,j,x,y;
- // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1
- x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p];
- y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p];
- if (x && y) {
- if (!stbi__create_png_image_raw(a, raw, raw_len, out_n, x, y)) {
- free(final);
- return 0;
- }
- for (j=0; j < y; ++j)
- for (i=0; i < x; ++i)
- memcpy(final + (j*yspc[p]+yorig[p])*a->s->img_x*out_n + (i*xspc[p]+xorig[p])*out_n,
- a->out + (j*x+i)*out_n, out_n);
- free(a->out);
- raw += (x*out_n+1)*y;
- raw_len -= (x*out_n+1)*y;
- }
- }
- a->out = final;
-
- return 1;
-}
-
-static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n)
-{
- stbi__context *s = z->s;
- stbi__uint32 i, pixel_count = s->img_x * s->img_y;
- stbi_uc *p = z->out;
-
- // compute color-based transparency, assuming we've
- // already got 255 as the alpha value in the output
- assert(out_n == 2 || out_n == 4);
-
- if (out_n == 2) {
- for (i=0; i < pixel_count; ++i) {
- p[1] = (p[0] == tc[0] ? 0 : 255);
- p += 2;
- }
- } else {
- for (i=0; i < pixel_count; ++i) {
- if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
- p[3] = 0;
- p += 4;
- }
- }
- return 1;
-}
-
-static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n)
-{
- stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y;
- stbi_uc *p, *temp_out, *orig = a->out;
-
- p = (stbi_uc *) malloc(pixel_count * pal_img_n);
- if (p == NULL) return stbi__err("outofmem", "Out of memory");
-
- // between here and free(out) below, exitting would leak
- temp_out = p;
-
- if (pal_img_n == 3) {
- for (i=0; i < pixel_count; ++i) {
- int n = orig[i]*4;
- p[0] = palette[n ];
- p[1] = palette[n+1];
- p[2] = palette[n+2];
- p += 3;
- }
- } else {
- for (i=0; i < pixel_count; ++i) {
- int n = orig[i]*4;
- p[0] = palette[n ];
- p[1] = palette[n+1];
- p[2] = palette[n+2];
- p[3] = palette[n+3];
- p += 4;
- }
- }
- free(a->out);
- a->out = temp_out;
-
- STBI_NOTUSED(len);
-
- return 1;
-}
-
-static int stbi__unpremultiply_on_load = 0;
-static int stbi__de_iphone_flag = 0;
-
-STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
-{
- stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply;
-}
-
-STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
-{
- stbi__de_iphone_flag = flag_true_if_should_convert;
-}
-
-static void stbi__de_iphone(stbi__png *z)
-{
- stbi__context *s = z->s;
- stbi__uint32 i, pixel_count = s->img_x * s->img_y;
- stbi_uc *p = z->out;
-
- if (s->img_out_n == 3) { // convert bgr to rgb
- for (i=0; i < pixel_count; ++i) {
- stbi_uc t = p[0];
- p[0] = p[2];
- p[2] = t;
- p += 3;
- }
- } else {
- assert(s->img_out_n == 4);
- if (stbi__unpremultiply_on_load) {
- // convert bgr to rgb and unpremultiply
- for (i=0; i < pixel_count; ++i) {
- stbi_uc a = p[3];
- stbi_uc t = p[0];
- if (a) {
- p[0] = p[2] * 255 / a;
- p[1] = p[1] * 255 / a;
- p[2] = t * 255 / a;
- } else {
- p[0] = p[2];
- p[2] = t;
- }
- p += 4;
- }
- } else {
- // convert bgr to rgb
- for (i=0; i < pixel_count; ++i) {
- stbi_uc t = p[0];
- p[0] = p[2];
- p[2] = t;
- p += 4;
- }
- }
- }
-}
-
-static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp)
-{
- stbi_uc palette[1024], pal_img_n=0;
- stbi_uc has_trans=0, tc[3];
- stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0;
- int first=1,k,interlace=0, is_iphone=0;
- stbi__context *s = z->s;
-
- z->expanded = NULL;
- z->idata = NULL;
- z->out = NULL;
-
- if (!stbi__check_png_header(s)) return 0;
-
- if (scan == SCAN_type) return 1;
-
- for (;;) {
- stbi__pngchunk c = stbi__get_chunk_header(s);
- switch (c.type) {
- case PNG_TYPE('C','g','B','I'):
- is_iphone = 1;
- stbi__skip(s, c.length);
- break;
- case PNG_TYPE('I','H','D','R'): {
- int depth,color,comp,filter;
- if (!first) return stbi__err("multiple IHDR","Corrupt PNG");
- first = 0;
- if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG");
- s->img_x = stbi__get32be(s); if (s->img_x > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)");
- s->img_y = stbi__get32be(s); if (s->img_y > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)");
- depth = stbi__get8(s); if (depth != 8) return stbi__err("8bit only","PNG not supported: 8-bit only");
- color = stbi__get8(s); if (color > 6) return stbi__err("bad ctype","Corrupt PNG");
- if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG");
- comp = stbi__get8(s); if (comp) return stbi__err("bad comp method","Corrupt PNG");
- filter= stbi__get8(s); if (filter) return stbi__err("bad filter method","Corrupt PNG");
- interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG");
- if (!s->img_x || !s->img_y) return stbi__err("0-pixel image","Corrupt PNG");
- if (!pal_img_n) {
- s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0);
- if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to stbi__jpeg_huff_decode");
- if (scan == SCAN_header) return 1;
- } else {
- // if paletted, then pal_n is our final components, and
- // img_n is # components to decompress/filter.
- s->img_n = 1;
- if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG");
- // if SCAN_header, have to scan to see if we have a tRNS
- }
- break;
- }
-
- case PNG_TYPE('P','L','T','E'): {
- if (first) return stbi__err("first not IHDR", "Corrupt PNG");
- if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG");
- pal_len = c.length / 3;
- if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG");
- for (i=0; i < pal_len; ++i) {
- palette[i*4+0] = stbi__get8(s);
- palette[i*4+1] = stbi__get8(s);
- palette[i*4+2] = stbi__get8(s);
- palette[i*4+3] = 255;
- }
- break;
- }
-
- case PNG_TYPE('t','R','N','S'): {
- if (first) return stbi__err("first not IHDR", "Corrupt PNG");
- if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG");
- if (pal_img_n) {
- if (scan == SCAN_header) { s->img_n = 4; return 1; }
- if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG");
- if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG");
- pal_img_n = 4;
- for (i=0; i < c.length; ++i)
- palette[i*4+3] = stbi__get8(s);
- } else {
- if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG");
- if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG");
- has_trans = 1;
- for (k=0; k < s->img_n; ++k)
- tc[k] = (stbi_uc) (stbi__get16be(s) & 255); // non 8-bit images will be larger
- }
- break;
- }
-
- case PNG_TYPE('I','D','A','T'): {
- if (first) return stbi__err("first not IHDR", "Corrupt PNG");
- if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG");
- if (scan == SCAN_header) { s->img_n = pal_img_n; return 1; }
- if (ioff + c.length > idata_limit) {
- stbi_uc *p;
- if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096;
- while (ioff + c.length > idata_limit)
- idata_limit *= 2;
- p = (stbi_uc *) realloc(z->idata, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory");
- z->idata = p;
- }
- if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG");
- ioff += c.length;
- break;
- }
-
- case PNG_TYPE('I','E','N','D'): {
- stbi__uint32 raw_len;
- if (first) return stbi__err("first not IHDR", "Corrupt PNG");
- if (scan != SCAN_load) return 1;
- if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG");
- z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, 16384, (int *) &raw_len, !is_iphone);
- if (z->expanded == NULL) return 0; // zlib should set error
- free(z->idata); z->idata = NULL;
- if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans)
- s->img_out_n = s->img_n+1;
- else
- s->img_out_n = s->img_n;
- if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, interlace)) return 0;
- if (has_trans)
- if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0;
- if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2)
- stbi__de_iphone(z);
- if (pal_img_n) {
- // pal_img_n == 3 or 4
- s->img_n = pal_img_n; // record the actual colors we had
- s->img_out_n = pal_img_n;
- if (req_comp >= 3) s->img_out_n = req_comp;
- if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n))
- return 0;
- }
- free(z->expanded); z->expanded = NULL;
- return 1;
- }
-
- default:
- // if critical, fail
- if (first) return stbi__err("first not IHDR", "Corrupt PNG");
- if ((c.type & (1 << 29)) == 0) {
- #ifndef STBI_NO_FAILURE_STRINGS
- // not threadsafe
- static char invalid_chunk[] = "XXXX PNG chunk not known";
- invalid_chunk[0] = STBI__BYTECAST(c.type >> 24);
- invalid_chunk[1] = STBI__BYTECAST(c.type >> 16);
- invalid_chunk[2] = STBI__BYTECAST(c.type >> 8);
- invalid_chunk[3] = STBI__BYTECAST(c.type >> 0);
- #endif
- return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type");
- }
- stbi__skip(s, c.length);
- break;
- }
- // end of PNG chunk, read and skip CRC
- stbi__get32be(s);
- }
-}
-
-static unsigned char *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp)
-{
- unsigned char *result=NULL;
- if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
- if (stbi__parse_png_file(p, SCAN_load, req_comp)) {
- result = p->out;
- p->out = NULL;
- if (req_comp && req_comp != p->s->img_out_n) {
- result = stbi__convert_format(result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
- p->s->img_out_n = req_comp;
- if (result == NULL) return result;
- }
- *x = p->s->img_x;
- *y = p->s->img_y;
- if (n) *n = p->s->img_n;
- }
- free(p->out); p->out = NULL;
- free(p->expanded); p->expanded = NULL;
- free(p->idata); p->idata = NULL;
-
- return result;
-}
-
-static unsigned char *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
- stbi__png p;
- p.s = s;
- return stbi__do_png(&p, x,y,comp,req_comp);
-}
-
-static int stbi__png_test(stbi__context *s)
-{
- int r;
- r = stbi__check_png_header(s);
- stbi__rewind(s);
- return r;
-}
-
-static int stbi__png_info_raw(stbi__png *p, int *x, int *y, int *comp)
-{
- if (!stbi__parse_png_file(p, SCAN_header, 0)) {
- stbi__rewind( p->s );
- return 0;
- }
- if (x) *x = p->s->img_x;
- if (y) *y = p->s->img_y;
- if (comp) *comp = p->s->img_n;
- return 1;
-}
-
-static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp)
-{
- stbi__png p;
- p.s = s;
- return stbi__png_info_raw(&p, x, y, comp);
-}
-
-// Microsoft/Windows BMP image
-static int stbi__bmp_test_raw(stbi__context *s)
-{
- int r;
- int sz;
- if (stbi__get8(s) != 'B') return 0;
- if (stbi__get8(s) != 'M') return 0;
- stbi__get32le(s); // discard filesize
- stbi__get16le(s); // discard reserved
- stbi__get16le(s); // discard reserved
- stbi__get32le(s); // discard data offset
- sz = stbi__get32le(s);
- r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124);
- return r;
-}
-
-static int stbi__bmp_test(stbi__context *s)
-{
- int r = stbi__bmp_test_raw(s);
- stbi__rewind(s);
- return r;
-}
-
-
-// returns 0..31 for the highest set bit
-static int stbi__high_bit(unsigned int z)
-{
- int n=0;
- if (z == 0) return -1;
- if (z >= 0x10000) n += 16, z >>= 16;
- if (z >= 0x00100) n += 8, z >>= 8;
- if (z >= 0x00010) n += 4, z >>= 4;
- if (z >= 0x00004) n += 2, z >>= 2;
- if (z >= 0x00002) n += 1, z >>= 1;
- return n;
-}
-
-static int stbi__bitcount(unsigned int a)
-{
- a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2
- a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4
- a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits
- a = (a + (a >> 8)); // max 16 per 8 bits
- a = (a + (a >> 16)); // max 32 per 8 bits
- return a & 0xff;
-}
-
-static int stbi__shiftsigned(int v, int shift, int bits)
-{
- int result;
- int z=0;
-
- if (shift < 0) v <<= -shift;
- else v >>= shift;
- result = v;
-
- z = bits;
- while (z < 8) {
- result += v >> z;
- z += bits;
- }
- return result;
-}
-
-static stbi_uc *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
- stbi_uc *out;
- unsigned int mr=0,mg=0,mb=0,ma=0, fake_a=0;
- stbi_uc pal[256][4];
- int psize=0,i,j,compress=0,width;
- int bpp, flip_vertically, pad, target, offset, hsz;
- if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP");
- stbi__get32le(s); // discard filesize
- stbi__get16le(s); // discard reserved
- stbi__get16le(s); // discard reserved
- offset = stbi__get32le(s);
- hsz = stbi__get32le(s);
- if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown");
- if (hsz == 12) {
- s->img_x = stbi__get16le(s);
- s->img_y = stbi__get16le(s);
- } else {
- s->img_x = stbi__get32le(s);
- s->img_y = stbi__get32le(s);
- }
- if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP");
- bpp = stbi__get16le(s);
- if (bpp == 1) return stbi__errpuc("monochrome", "BMP type not supported: 1-bit");
- flip_vertically = ((int) s->img_y) > 0;
- s->img_y = abs((int) s->img_y);
- if (hsz == 12) {
- if (bpp < 24)
- psize = (offset - 14 - 24) / 3;
- } else {
- compress = stbi__get32le(s);
- if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE");
- stbi__get32le(s); // discard sizeof
- stbi__get32le(s); // discard hres
- stbi__get32le(s); // discard vres
- stbi__get32le(s); // discard colorsused
- stbi__get32le(s); // discard max important
- if (hsz == 40 || hsz == 56) {
- if (hsz == 56) {
- stbi__get32le(s);
- stbi__get32le(s);
- stbi__get32le(s);
- stbi__get32le(s);
- }
- if (bpp == 16 || bpp == 32) {
- mr = mg = mb = 0;
- if (compress == 0) {
- if (bpp == 32) {
- mr = 0xffu << 16;
- mg = 0xffu << 8;
- mb = 0xffu << 0;
- ma = 0xffu << 24;
- fake_a = 1; // @TODO: check for cases like alpha value is all 0 and switch it to 255
- STBI_NOTUSED(fake_a);
- } else {
- mr = 31u << 10;
- mg = 31u << 5;
- mb = 31u << 0;
- }
- } else if (compress == 3) {
- mr = stbi__get32le(s);
- mg = stbi__get32le(s);
- mb = stbi__get32le(s);
- // not documented, but generated by photoshop and handled by mspaint
- if (mr == mg && mg == mb) {
- // ?!?!?
- return stbi__errpuc("bad BMP", "bad BMP");
- }
- } else
- return stbi__errpuc("bad BMP", "bad BMP");
- }
- } else {
- assert(hsz == 108 || hsz == 124);
- mr = stbi__get32le(s);
- mg = stbi__get32le(s);
- mb = stbi__get32le(s);
- ma = stbi__get32le(s);
- stbi__get32le(s); // discard color space
- for (i=0; i < 12; ++i)
- stbi__get32le(s); // discard color space parameters
- if (hsz == 124) {
- stbi__get32le(s); // discard rendering intent
- stbi__get32le(s); // discard offset of profile data
- stbi__get32le(s); // discard size of profile data
- stbi__get32le(s); // discard reserved
- }
- }
- if (bpp < 16)
- psize = (offset - 14 - hsz) >> 2;
- }
- s->img_n = ma ? 4 : 3;
- if (req_comp && req_comp >= 3) // we can directly stbi__jpeg_huff_decode 3 or 4
- target = req_comp;
- else
- target = s->img_n; // if they want monochrome, we'll post-convert
- out = (stbi_uc *) malloc(target * s->img_x * s->img_y);
- if (!out) return stbi__errpuc("outofmem", "Out of memory");
- if (bpp < 16) {
- int z=0;
- if (psize == 0 || psize > 256) { free(out); return stbi__errpuc("invalid", "Corrupt BMP"); }
- for (i=0; i < psize; ++i) {
- pal[i][2] = stbi__get8(s);
- pal[i][1] = stbi__get8(s);
- pal[i][0] = stbi__get8(s);
- if (hsz != 12) stbi__get8(s);
- pal[i][3] = 255;
- }
- stbi__skip(s, offset - 14 - hsz - psize * (hsz == 12 ? 3 : 4));
- if (bpp == 4) width = (s->img_x + 1) >> 1;
- else if (bpp == 8) width = s->img_x;
- else { free(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); }
- pad = (-width)&3;
- for (j=0; j < (int) s->img_y; ++j) {
- for (i=0; i < (int) s->img_x; i += 2) {
- int v=stbi__get8(s),v2=0;
- if (bpp == 4) {
- v2 = v & 15;
- v >>= 4;
- }
- out[z++] = pal[v][0];
- out[z++] = pal[v][1];
- out[z++] = pal[v][2];
- if (target == 4) out[z++] = 255;
- if (i+1 == (int) s->img_x) break;
- v = (bpp == 8) ? stbi__get8(s) : v2;
- out[z++] = pal[v][0];
- out[z++] = pal[v][1];
- out[z++] = pal[v][2];
- if (target == 4) out[z++] = 255;
- }
- stbi__skip(s, pad);
- }
- } else {
- int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0;
- int z = 0;
- int easy=0;
- stbi__skip(s, offset - 14 - hsz);
- if (bpp == 24) width = 3 * s->img_x;
- else if (bpp == 16) width = 2*s->img_x;
- else /* bpp = 32 and pad = 0 */ width=0;
- pad = (-width) & 3;
- if (bpp == 24) {
- easy = 1;
- } else if (bpp == 32) {
- if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000)
- easy = 2;
- }
- if (!easy) {
- if (!mr || !mg || !mb) { free(out); return stbi__errpuc("bad masks", "Corrupt BMP"); }
- // right shift amt to put high bit in position #7
- rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr);
- gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg);
- bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb);
- ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma);
- }
- for (j=0; j < (int) s->img_y; ++j) {
- if (easy) {
- for (i=0; i < (int) s->img_x; ++i) {
- unsigned char a;
- out[z+2] = stbi__get8(s);
- out[z+1] = stbi__get8(s);
- out[z+0] = stbi__get8(s);
- z += 3;
- a = (easy == 2 ? stbi__get8(s) : 255);
- if (target == 4) out[z++] = a;
- }
- } else {
- for (i=0; i < (int) s->img_x; ++i) {
- stbi__uint32 v = (stbi__uint32) (bpp == 16 ? stbi__get16le(s) : stbi__get32le(s));
- int a;
- out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount));
- out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount));
- out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount));
- a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255);
- if (target == 4) out[z++] = STBI__BYTECAST(a);
- }
- }
- stbi__skip(s, pad);
- }
- }
- if (flip_vertically) {
- stbi_uc t;
- for (j=0; j < (int) s->img_y>>1; ++j) {
- stbi_uc *p1 = out + j *s->img_x*target;
- stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target;
- for (i=0; i < (int) s->img_x*target; ++i) {
- t = p1[i], p1[i] = p2[i], p2[i] = t;
- }
- }
- }
-
- if (req_comp && req_comp != target) {
- out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y);
- if (out == NULL) return out; // stbi__convert_format frees input on failure
- }
-
- *x = s->img_x;
- *y = s->img_y;
- if (comp) *comp = s->img_n;
- return out;
-}
-
-// Targa Truevision - TGA
-// by Jonathan Dummer
-
-static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp)
-{
- int tga_w, tga_h, tga_comp;
- int sz;
- stbi__get8(s); // discard Offset
- sz = stbi__get8(s); // color type
- if( sz > 1 ) {
- stbi__rewind(s);
- return 0; // only RGB or indexed allowed
- }
- sz = stbi__get8(s); // image type
- // only RGB or grey allowed, +/- RLE
- if ((sz != 1) && (sz != 2) && (sz != 3) && (sz != 9) && (sz != 10) && (sz != 11)) return 0;
- stbi__skip(s,9);
- tga_w = stbi__get16le(s);
- if( tga_w < 1 ) {
- stbi__rewind(s);
- return 0; // test width
- }
- tga_h = stbi__get16le(s);
- if( tga_h < 1 ) {
- stbi__rewind(s);
- return 0; // test height
- }
- sz = stbi__get8(s); // bits per pixel
- // only RGB or RGBA or grey allowed
- if ((sz != 8) && (sz != 16) && (sz != 24) && (sz != 32)) {
- stbi__rewind(s);
- return 0;
- }
- tga_comp = sz;
- if (x) *x = tga_w;
- if (y) *y = tga_h;
- if (comp) *comp = tga_comp / 8;
- return 1; // seems to have passed everything
-}
-
-static int stbi__tga_test(stbi__context *s)
-{
- int res;
- int sz;
- stbi__get8(s); // discard Offset
- sz = stbi__get8(s); // color type
- if ( sz > 1 ) return 0; // only RGB or indexed allowed
- sz = stbi__get8(s); // image type
- if ( (sz != 1) && (sz != 2) && (sz != 3) && (sz != 9) && (sz != 10) && (sz != 11) ) return 0; // only RGB or grey allowed, +/- RLE
- stbi__get16be(s); // discard palette start
- stbi__get16be(s); // discard palette length
- stbi__get8(s); // discard bits per palette color entry
- stbi__get16be(s); // discard x origin
- stbi__get16be(s); // discard y origin
- if ( stbi__get16be(s) < 1 ) return 0; // test width
- if ( stbi__get16be(s) < 1 ) return 0; // test height
- sz = stbi__get8(s); // bits per pixel
- if ( (sz != 8) && (sz != 16) && (sz != 24) && (sz != 32) )
- res = 0;
- else
- res = 1;
- stbi__rewind(s);
- return res;
-}
-
-static stbi_uc *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
- // read in the TGA header stuff
- int tga_offset = stbi__get8(s);
- int tga_indexed = stbi__get8(s);
- int tga_image_type = stbi__get8(s);
- int tga_is_RLE = 0;
- int tga_palette_start = stbi__get16le(s);
- int tga_palette_len = stbi__get16le(s);
- int tga_palette_bits = stbi__get8(s);
- int tga_x_origin = stbi__get16le(s);
- int tga_y_origin = stbi__get16le(s);
- int tga_width = stbi__get16le(s);
- int tga_height = stbi__get16le(s);
- int tga_bits_per_pixel = stbi__get8(s);
- int tga_comp = tga_bits_per_pixel / 8;
- int tga_inverted = stbi__get8(s);
- // image data
- unsigned char *tga_data;
- unsigned char *tga_palette = NULL;
- int i, j;
- unsigned char raw_data[4];
- int RLE_count = 0;
- int RLE_repeating = 0;
- int read_next_pixel = 1;
-
- // do a tiny bit of precessing
- if ( tga_image_type >= 8 )
- {
- tga_image_type -= 8;
- tga_is_RLE = 1;
- }
- /* int tga_alpha_bits = tga_inverted & 15; */
- tga_inverted = 1 - ((tga_inverted >> 5) & 1);
-
- // error check
- if ( //(tga_indexed) ||
- (tga_width < 1) || (tga_height < 1) ||
- (tga_image_type < 1) || (tga_image_type > 3) ||
- ((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16) &&
- (tga_bits_per_pixel != 24) && (tga_bits_per_pixel != 32))
- )
- {
- return NULL; // we don't report this as a bad TGA because we don't even know if it's TGA
- }
-
- // If I'm paletted, then I'll use the number of bits from the palette
- if ( tga_indexed )
- {
- tga_comp = tga_palette_bits / 8;
- }
-
- // tga info
- *x = tga_width;
- *y = tga_height;
- if (comp) *comp = tga_comp;
-
- tga_data = (unsigned char*)malloc( tga_width * tga_height * tga_comp );
- if (!tga_data) return stbi__errpuc("outofmem", "Out of memory");
-
- // skip to the data's starting position (offset usually = 0)
- stbi__skip(s, tga_offset );
-
- if ( !tga_indexed && !tga_is_RLE) {
- for (i=0; i < tga_height; ++i) {
- int y = tga_inverted ? tga_height -i - 1 : i;
- stbi_uc *tga_row = tga_data + y*tga_width*tga_comp;
- stbi__getn(s, tga_row, tga_width * tga_comp);
- }
- } else {
- // do I need to load a palette?
- if ( tga_indexed)
- {
- // any data to skip? (offset usually = 0)
- stbi__skip(s, tga_palette_start );
- // load the palette
- tga_palette = (unsigned char*)malloc( tga_palette_len * tga_palette_bits / 8 );
- if (!tga_palette) {
- free(tga_data);
- return stbi__errpuc("outofmem", "Out of memory");
- }
- if (!stbi__getn(s, tga_palette, tga_palette_len * tga_palette_bits / 8 )) {
- free(tga_data);
- free(tga_palette);
- return stbi__errpuc("bad palette", "Corrupt TGA");
- }
- }
- // load the data
- for (i=0; i < tga_width * tga_height; ++i)
- {
- // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk?
- if ( tga_is_RLE )
- {
- if ( RLE_count == 0 )
- {
- // yep, get the next byte as a RLE command
- int RLE_cmd = stbi__get8(s);
- RLE_count = 1 + (RLE_cmd & 127);
- RLE_repeating = RLE_cmd >> 7;
- read_next_pixel = 1;
- } else if ( !RLE_repeating )
- {
- read_next_pixel = 1;
- }
- } else
- {
- read_next_pixel = 1;
- }
- // OK, if I need to read a pixel, do it now
- if ( read_next_pixel )
- {
- // load however much data we did have
- if ( tga_indexed )
- {
- // read in 1 byte, then perform the lookup
- int pal_idx = stbi__get8(s);
- if ( pal_idx >= tga_palette_len )
- {
- // invalid index
- pal_idx = 0;
- }
- pal_idx *= tga_bits_per_pixel / 8;
- for (j = 0; j*8 < tga_bits_per_pixel; ++j)
- {
- raw_data[j] = tga_palette[pal_idx+j];
- }
- } else
- {
- // read in the data raw
- for (j = 0; j*8 < tga_bits_per_pixel; ++j)
- {
- raw_data[j] = stbi__get8(s);
- }
- }
- // clear the reading flag for the next pixel
- read_next_pixel = 0;
- } // end of reading a pixel
-
- // copy data
- for (j = 0; j < tga_comp; ++j)
- tga_data[i*tga_comp+j] = raw_data[j];
-
- // in case we're in RLE mode, keep counting down
- --RLE_count;
- }
- // do I need to invert the image?
- if ( tga_inverted )
- {
- for (j = 0; j*2 < tga_height; ++j)
- {
- int index1 = j * tga_width * tga_comp;
- int index2 = (tga_height - 1 - j) * tga_width * tga_comp;
- for (i = tga_width * tga_comp; i > 0; --i)
- {
- unsigned char temp = tga_data[index1];
- tga_data[index1] = tga_data[index2];
- tga_data[index2] = temp;
- ++index1;
- ++index2;
- }
- }
- }
- // clear my palette, if I had one
- if ( tga_palette != NULL )
- {
- free( tga_palette );
- }
- }
-
- // swap RGB
- if (tga_comp >= 3)
- {
- unsigned char* tga_pixel = tga_data;
- for (i=0; i < tga_width * tga_height; ++i)
- {
- unsigned char temp = tga_pixel[0];
- tga_pixel[0] = tga_pixel[2];
- tga_pixel[2] = temp;
- tga_pixel += tga_comp;
- }
- }
-
- // convert to target component count
- if (req_comp && req_comp != tga_comp)
- tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height);
-
- // the things I do to get rid of an error message, and yet keep
- // Microsoft's C compilers happy... [8^(
- tga_palette_start = tga_palette_len = tga_palette_bits =
- tga_x_origin = tga_y_origin = 0;
- // OK, done
- return tga_data;
-}
-
-// *************************************************************************************************
-// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB
-
-static int stbi__psd_test(stbi__context *s)
-{
- int r = (stbi__get32be(s) == 0x38425053);
- stbi__rewind(s);
- return r;
-}
-
-static stbi_uc *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
- int pixelCount;
- int channelCount, compression;
- int channel, i, count, len;
- int w,h;
- stbi_uc *out;
-
- // Check identifier
- if (stbi__get32be(s) != 0x38425053) // "8BPS"
- return stbi__errpuc("not PSD", "Corrupt PSD image");
-
- // Check file type version.
- if (stbi__get16be(s) != 1)
- return stbi__errpuc("wrong version", "Unsupported version of PSD image");
-
- // Skip 6 reserved bytes.
- stbi__skip(s, 6 );
-
- // Read the number of channels (R, G, B, A, etc).
- channelCount = stbi__get16be(s);
- if (channelCount < 0 || channelCount > 16)
- return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image");
-
- // Read the rows and columns of the image.
- h = stbi__get32be(s);
- w = stbi__get32be(s);
-
- // Make sure the depth is 8 bits.
- if (stbi__get16be(s) != 8)
- return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 bit");
-
- // Make sure the color mode is RGB.
- // Valid options are:
- // 0: Bitmap
- // 1: Grayscale
- // 2: Indexed color
- // 3: RGB color
- // 4: CMYK color
- // 7: Multichannel
- // 8: Duotone
- // 9: Lab color
- if (stbi__get16be(s) != 3)
- return stbi__errpuc("wrong color format", "PSD is not in RGB color format");
-
- // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.)
- stbi__skip(s,stbi__get32be(s) );
-
- // Skip the image resources. (resolution, pen tool paths, etc)
- stbi__skip(s, stbi__get32be(s) );
-
- // Skip the reserved data.
- stbi__skip(s, stbi__get32be(s) );
-
- // Find out if the data is compressed.
- // Known values:
- // 0: no compression
- // 1: RLE compressed
- compression = stbi__get16be(s);
- if (compression > 1)
- return stbi__errpuc("bad compression", "PSD has an unknown compression format");
-
- // Create the destination image.
- out = (stbi_uc *) malloc(4 * w*h);
- if (!out) return stbi__errpuc("outofmem", "Out of memory");
- pixelCount = w*h;
-
- // Initialize the data to zero.
- //memset( out, 0, pixelCount * 4 );
-
- // Finally, the image data.
- if (compression) {
- // RLE as used by .PSD and .TIFF
- // Loop until you get the number of unpacked bytes you are expecting:
- // Read the next source byte into n.
- // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally.
- // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times.
- // Else if n is 128, noop.
- // Endloop
-
- // The RLE-compressed data is preceeded by a 2-byte data count for each row in the data,
- // which we're going to just skip.
- stbi__skip(s, h * channelCount * 2 );
-
- // Read the RLE data by channel.
- for (channel = 0; channel < 4; channel++) {
- stbi_uc *p;
-
- p = out+channel;
- if (channel >= channelCount) {
- // Fill this channel with default data.
- for (i = 0; i < pixelCount; i++) *p = (channel == 3 ? 255 : 0), p += 4;
- } else {
- // Read the RLE data.
- count = 0;
- while (count < pixelCount) {
- len = stbi__get8(s);
- if (len == 128) {
- // No-op.
- } else if (len < 128) {
- // Copy next len+1 bytes literally.
- len++;
- count += len;
- while (len) {
- *p = stbi__get8(s);
- p += 4;
- len--;
- }
- } else if (len > 128) {
- stbi_uc val;
- // Next -len+1 bytes in the dest are replicated from next source byte.
- // (Interpret len as a negative 8-bit int.)
- len ^= 0x0FF;
- len += 2;
- val = stbi__get8(s);
- count += len;
- while (len) {
- *p = val;
- p += 4;
- len--;
- }
- }
- }
- }
- }
-
- } else {
- // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...)
- // where each channel consists of an 8-bit value for each pixel in the image.
-
- // Read the data by channel.
- for (channel = 0; channel < 4; channel++) {
- stbi_uc *p;
-
- p = out + channel;
- if (channel > channelCount) {
- // Fill this channel with default data.
- for (i = 0; i < pixelCount; i++) *p = channel == 3 ? 255 : 0, p += 4;
- } else {
- // Read the data.
- for (i = 0; i < pixelCount; i++)
- *p = stbi__get8(s), p += 4;
- }
- }
- }
-
- if (req_comp && req_comp != 4) {
- out = stbi__convert_format(out, 4, req_comp, w, h);
- if (out == NULL) return out; // stbi__convert_format frees input on failure
- }
-
- if (comp) *comp = channelCount;
- *y = h;
- *x = w;
-
- return out;
-}
-
-// *************************************************************************************************
-// Softimage PIC loader
-// by Tom Seddon
-//
-// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format
-// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/
-
-static int stbi__pic_is4(stbi__context *s,const char *str)
-{
- int i;
- for (i=0; i<4; ++i)
- if (stbi__get8(s) != (stbi_uc)str[i])
- return 0;
-
- return 1;
-}
-
-static int stbi__pic_test_core(stbi__context *s)
-{
- int i;
-
- if (!stbi__pic_is4(s,"\x53\x80\xF6\x34"))
- return 0;
-
- for(i=0;i<84;++i)
- stbi__get8(s);
-
- if (!stbi__pic_is4(s,"PICT"))
- return 0;
-
- return 1;
-}
-
-typedef struct
-{
- stbi_uc size,type,channel;
-} stbi__pic_packet;
-
-static stbi_uc *stbi__readval(stbi__context *s, int channel, stbi_uc *dest)
-{
- int mask=0x80, i;
-
- for (i=0; i<4; ++i, mask>>=1) {
- if (channel & mask) {
- if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short");
- dest[i]=stbi__get8(s);
- }
- }
-
- return dest;
-}
-
-static void stbi__copyval(int channel,stbi_uc *dest,const stbi_uc *src)
-{
- int mask=0x80,i;
-
- for (i=0;i<4; ++i, mask>>=1)
- if (channel&mask)
- dest[i]=src[i];
-}
-
-static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *comp, stbi_uc *result)
-{
- int act_comp=0,num_packets=0,y,chained;
- stbi__pic_packet packets[10];
-
- // this will (should...) cater for even some bizarre stuff like having data
- // for the same channel in multiple packets.
- do {
- stbi__pic_packet *packet;
-
- if (num_packets==sizeof(packets)/sizeof(packets[0]))
- return stbi__errpuc("bad format","too many packets");
-
- packet = &packets[num_packets++];
-
- chained = stbi__get8(s);
- packet->size = stbi__get8(s);
- packet->type = stbi__get8(s);
- packet->channel = stbi__get8(s);
-
- act_comp |= packet->channel;
-
- if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (reading packets)");
- if (packet->size != 8) return stbi__errpuc("bad format","packet isn't 8bpp");
- } while (chained);
-
- *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel?
-
- for(y=0; y<height; ++y) {
- int packet_idx;
-
- for(packet_idx=0; packet_idx < num_packets; ++packet_idx) {
- stbi__pic_packet *packet = &packets[packet_idx];
- stbi_uc *dest = result+y*width*4;
-
- switch (packet->type) {
- default:
- return stbi__errpuc("bad format","packet has bad compression type");
-
- case 0: {//uncompressed
- int x;
-
- for(x=0;x<width;++x, dest+=4)
- if (!stbi__readval(s,packet->channel,dest))
- return 0;
- break;
- }
-
- case 1://Pure RLE
- {
- int left=width, i;
-
- while (left>0) {
- stbi_uc count,value[4];
-
- count=stbi__get8(s);
- if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pure read count)");
-
- if (count > left)
- count = (stbi_uc) left;
-
- if (!stbi__readval(s,packet->channel,value)) return 0;
-
- for(i=0; i<count; ++i,dest+=4)
- stbi__copyval(packet->channel,dest,value);
- left -= count;
- }
- }
- break;
-
- case 2: {//Mixed RLE
- int left=width;
- while (left>0) {
- int count = stbi__get8(s), i;
- if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (mixed read count)");
-
- if (count >= 128) { // Repeated
- stbi_uc value[4];
- int i;
-
- if (count==128)
- count = stbi__get16be(s);
- else
- count -= 127;
- if (count > left)
- return stbi__errpuc("bad file","scanline overrun");
-
- if (!stbi__readval(s,packet->channel,value))
- return 0;
-
- for(i=0;i<count;++i, dest += 4)
- stbi__copyval(packet->channel,dest,value);
- } else { // Raw
- ++count;
- if (count>left) return stbi__errpuc("bad file","scanline overrun");
-
- for(i=0;i<count;++i, dest+=4)
- if (!stbi__readval(s,packet->channel,dest))
- return 0;
- }
- left-=count;
- }
- break;
- }
- }
- }
- }
-
- return result;
-}
-
-static stbi_uc *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp)
-{
- stbi_uc *result;
- int i, x,y;
-
- for (i=0; i<92; ++i)
- stbi__get8(s);
-
- x = stbi__get16be(s);
- y = stbi__get16be(s);
- if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pic header)");
- if ((1 << 28) / x < y) return stbi__errpuc("too large", "Image too large to stbi__jpeg_huff_decode");
-
- stbi__get32be(s); //skip `ratio'
- stbi__get16be(s); //skip `fields'
- stbi__get16be(s); //skip `pad'
-
- // intermediate buffer is RGBA
- result = (stbi_uc *) malloc(x*y*4);
- memset(result, 0xff, x*y*4);
-
- if (!stbi__pic_load_core(s,x,y,comp, result)) {
- free(result);
- result=0;
- }
- *px = x;
- *py = y;
- if (req_comp == 0) req_comp = *comp;
- result=stbi__convert_format(result,4,req_comp,x,y);
-
- return result;
-}
-
-static int stbi__pic_test(stbi__context *s)
-{
- int r = stbi__pic_test_core(s);
- stbi__rewind(s);
- return r;
-}
-
-// *************************************************************************************************
-// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb
-typedef struct
-{
- stbi__int16 prefix;
- stbi_uc first;
- stbi_uc suffix;
-} stbi__gif_lzw;
-
-typedef struct
-{
- int w,h;
- stbi_uc *out; // output buffer (always 4 components)
- int flags, bgindex, ratio, transparent, eflags;
- stbi_uc pal[256][4];
- stbi_uc lpal[256][4];
- stbi__gif_lzw codes[4096];
- stbi_uc *color_table;
- int parse, step;
- int lflags;
- int start_x, start_y;
- int max_x, max_y;
- int cur_x, cur_y;
- int line_size;
-} stbi__gif;
-
-static int stbi__gif_test_raw(stbi__context *s)
-{
- int sz;
- if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0;
- sz = stbi__get8(s);
- if (sz != '9' && sz != '7') return 0;
- if (stbi__get8(s) != 'a') return 0;
- return 1;
-}
-
-static int stbi__gif_test(stbi__context *s)
-{
- int r = stbi__gif_test_raw(s);
- stbi__rewind(s);
- return r;
-}
-
-static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp)
-{
- int i;
- for (i=0; i < num_entries; ++i) {
- pal[i][2] = stbi__get8(s);
- pal[i][1] = stbi__get8(s);
- pal[i][0] = stbi__get8(s);
- pal[i][3] = transp ? 0 : 255;
- }
-}
-
-static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_info)
-{
- stbi_uc version;
- if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8')
- return stbi__err("not GIF", "Corrupt GIF");
-
- version = stbi__get8(s);
- if (version != '7' && version != '9') return stbi__err("not GIF", "Corrupt GIF");
- if (stbi__get8(s) != 'a') return stbi__err("not GIF", "Corrupt GIF");
-
- stbi__g_failure_reason = "";
- g->w = stbi__get16le(s);
- g->h = stbi__get16le(s);
- g->flags = stbi__get8(s);
- g->bgindex = stbi__get8(s);
- g->ratio = stbi__get8(s);
- g->transparent = -1;
-
- if (comp != 0) *comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments
-
- if (is_info) return 1;
-
- if (g->flags & 0x80)
- stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1);
-
- return 1;
-}
-
-static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp)
-{
- stbi__gif g;
- if (!stbi__gif_header(s, &g, comp, 1)) {
- stbi__rewind( s );
- return 0;
- }
- if (x) *x = g.w;
- if (y) *y = g.h;
- return 1;
-}
-
-static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code)
-{
- stbi_uc *p, *c;
-
- // recurse to stbi__jpeg_huff_decode the prefixes, since the linked-list is backwards,
- // and working backwards through an interleaved image would be nasty
- if (g->codes[code].prefix >= 0)
- stbi__out_gif_code(g, g->codes[code].prefix);
-
- if (g->cur_y >= g->max_y) return;
-
- p = &g->out[g->cur_x + g->cur_y];
- c = &g->color_table[g->codes[code].suffix * 4];
-
- if (c[3] >= 128) {
- p[0] = c[2];
- p[1] = c[1];
- p[2] = c[0];
- p[3] = c[3];
- }
- g->cur_x += 4;
-
- if (g->cur_x >= g->max_x) {
- g->cur_x = g->start_x;
- g->cur_y += g->step;
-
- while (g->cur_y >= g->max_y && g->parse > 0) {
- g->step = (1 << g->parse) * g->line_size;
- g->cur_y = g->start_y + (g->step >> 1);
- --g->parse;
- }
- }
-}
-
-static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g)
-{
- stbi_uc lzw_cs;
- stbi__int32 len, code;
- stbi__uint32 first;
- stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear;
- stbi__gif_lzw *p;
-
- lzw_cs = stbi__get8(s);
- clear = 1 << lzw_cs;
- first = 1;
- codesize = lzw_cs + 1;
- codemask = (1 << codesize) - 1;
- bits = 0;
- valid_bits = 0;
- for (code = 0; code < clear; code++) {
- g->codes[code].prefix = -1;
- g->codes[code].first = (stbi_uc) code;
- g->codes[code].suffix = (stbi_uc) code;
- }
-
- // support no starting clear code
- avail = clear+2;
- oldcode = -1;
-
- len = 0;
- for(;;) {
- if (valid_bits < codesize) {
- if (len == 0) {
- len = stbi__get8(s); // start new block
- if (len == 0)
- return g->out;
- }
- --len;
- bits |= (stbi__int32) stbi__get8(s) << valid_bits;
- valid_bits += 8;
- } else {
- stbi__int32 code = bits & codemask;
- bits >>= codesize;
- valid_bits -= codesize;
- // @OPTIMIZE: is there some way we can accelerate the non-clear path?
- if (code == clear) { // clear code
- codesize = lzw_cs + 1;
- codemask = (1 << codesize) - 1;
- avail = clear + 2;
- oldcode = -1;
- first = 0;
- } else if (code == clear + 1) { // end of stream code
- stbi__skip(s, len);
- while ((len = stbi__get8(s)) > 0)
- stbi__skip(s,len);
- return g->out;
- } else if (code <= avail) {
- if (first) return stbi__errpuc("no clear code", "Corrupt GIF");
-
- if (oldcode >= 0) {
- p = &g->codes[avail++];
- if (avail > 4096) return stbi__errpuc("too many codes", "Corrupt GIF");
- p->prefix = (stbi__int16) oldcode;
- p->first = g->codes[oldcode].first;
- p->suffix = (code == avail) ? p->first : g->codes[code].first;
- } else if (code == avail)
- return stbi__errpuc("illegal code in raster", "Corrupt GIF");
-
- stbi__out_gif_code(g, (stbi__uint16) code);
-
- if ((avail & codemask) == 0 && avail <= 0x0FFF) {
- codesize++;
- codemask = (1 << codesize) - 1;
- }
-
- oldcode = code;
- } else {
- return stbi__errpuc("illegal code in raster", "Corrupt GIF");
- }
- }
- }
-}
-
-static void stbi__fill_gif_background(stbi__gif *g)
-{
- int i;
- stbi_uc *c = g->pal[g->bgindex];
- // @OPTIMIZE: write a dword at a time
- for (i = 0; i < g->w * g->h * 4; i += 4) {
- stbi_uc *p = &g->out[i];
- p[0] = c[2];
- p[1] = c[1];
- p[2] = c[0];
- p[3] = c[3];
- }
-}
-
-// this function is designed to support animated gifs, although stb_image doesn't support it
-static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp)
-{
- int i;
- stbi_uc *old_out = 0;
-
- if (g->out == 0) {
- if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header
- g->out = (stbi_uc *) malloc(4 * g->w * g->h);
- if (g->out == 0) return stbi__errpuc("outofmem", "Out of memory");
- stbi__fill_gif_background(g);
- } else {
- // animated-gif-only path
- if (((g->eflags & 0x1C) >> 2) == 3) {
- old_out = g->out;
- g->out = (stbi_uc *) malloc(4 * g->w * g->h);
- if (g->out == 0) return stbi__errpuc("outofmem", "Out of memory");
- memcpy(g->out, old_out, g->w*g->h*4);
- }
- }
-
- for (;;) {
- switch (stbi__get8(s)) {
- case 0x2C: /* Image Descriptor */
- {
- stbi__int32 x, y, w, h;
- stbi_uc *o;
-
- x = stbi__get16le(s);
- y = stbi__get16le(s);
- w = stbi__get16le(s);
- h = stbi__get16le(s);
- if (((x + w) > (g->w)) || ((y + h) > (g->h)))
- return stbi__errpuc("bad Image Descriptor", "Corrupt GIF");
-
- g->line_size = g->w * 4;
- g->start_x = x * 4;
- g->start_y = y * g->line_size;
- g->max_x = g->start_x + w * 4;
- g->max_y = g->start_y + h * g->line_size;
- g->cur_x = g->start_x;
- g->cur_y = g->start_y;
-
- g->lflags = stbi__get8(s);
-
- if (g->lflags & 0x40) {
- g->step = 8 * g->line_size; // first interlaced spacing
- g->parse = 3;
- } else {
- g->step = g->line_size;
- g->parse = 0;
- }
-
- if (g->lflags & 0x80) {
- stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1);
- g->color_table = (stbi_uc *) g->lpal;
- } else if (g->flags & 0x80) {
- for (i=0; i < 256; ++i) // @OPTIMIZE: stbi__jpeg_reset only the previous transparent
- g->pal[i][3] = 255;
- if (g->transparent >= 0 && (g->eflags & 0x01))
- g->pal[g->transparent][3] = 0;
- g->color_table = (stbi_uc *) g->pal;
- } else
- return stbi__errpuc("missing color table", "Corrupt GIF");
-
- o = stbi__process_gif_raster(s, g);
- if (o == NULL) return NULL;
-
- if (req_comp && req_comp != 4)
- o = stbi__convert_format(o, 4, req_comp, g->w, g->h);
- return o;
- }
-
- case 0x21: // Comment Extension.
- {
- int len;
- if (stbi__get8(s) == 0xF9) { // Graphic Control Extension.
- len = stbi__get8(s);
- if (len == 4) {
- g->eflags = stbi__get8(s);
- stbi__get16le(s); // delay
- g->transparent = stbi__get8(s);
- } else {
- stbi__skip(s, len);
- break;
- }
- }
- while ((len = stbi__get8(s)) != 0)
- stbi__skip(s, len);
- break;
- }
-
- case 0x3B: // gif stream termination code
- return (stbi_uc *) 1;
-
- default:
- return stbi__errpuc("unknown code", "Corrupt GIF");
- }
- }
-}
-
-static stbi_uc *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
- stbi_uc *u = 0;
- stbi__gif g={0};
-
- u = stbi__gif_load_next(s, &g, comp, req_comp);
- if (u == (void *) 1) u = 0; // end of animated gif marker
- if (u) {
- *x = g.w;
- *y = g.h;
- }
-
- return u;
-}
-
-static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp)
-{
- return stbi__gif_info_raw(s,x,y,comp);
-}
-
-
-// *************************************************************************************************
-// Radiance RGBE HDR loader
-// originally by Nicolas Schulz
-#ifndef STBI_NO_HDR
-static int stbi__hdr_test_core(stbi__context *s)
-{
- const char *signature = "#?RADIANCE\n";
- int i;
- for (i=0; signature[i]; ++i)
- if (stbi__get8(s) != signature[i])
- return 0;
- return 1;
-}
-
-static int stbi__hdr_test(stbi__context* s)
-{
- int r = stbi__hdr_test_core(s);
- stbi__rewind(s);
- return r;
-}
-
-#define STBI__HDR_BUFLEN 1024
-static char *stbi__hdr_gettoken(stbi__context *z, char *buffer)
-{
- int len=0;
- char c = '\0';
-
- c = (char) stbi__get8(z);
-
- while (!stbi__at_eof(z) && c != '\n') {
- buffer[len++] = c;
- if (len == STBI__HDR_BUFLEN-1) {
- // flush to end of line
- while (!stbi__at_eof(z) && stbi__get8(z) != '\n')
- ;
- break;
- }
- c = (char) stbi__get8(z);
- }
-
- buffer[len] = 0;
- return buffer;
-}
-
-static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp)
-{
- if ( input[3] != 0 ) {
- float f1;
- // Exponent
- f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8));
- if (req_comp <= 2)
- output[0] = (input[0] + input[1] + input[2]) * f1 / 3;
- else {
- output[0] = input[0] * f1;
- output[1] = input[1] * f1;
- output[2] = input[2] * f1;
- }
- if (req_comp == 2) output[1] = 1;
- if (req_comp == 4) output[3] = 1;
- } else {
- switch (req_comp) {
- case 4: output[3] = 1; /* fallthrough */
- case 3: output[0] = output[1] = output[2] = 0;
- break;
- case 2: output[1] = 1; /* fallthrough */
- case 1: output[0] = 0;
- break;
- }
- }
-}
-
-static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
- char buffer[STBI__HDR_BUFLEN];
- char *token;
- int valid = 0;
- int width, height;
- stbi_uc *scanline;
- float *hdr_data;
- int len;
- unsigned char count, value;
- int i, j, k, c1,c2, z;
-
-
- // Check identifier
- if (strcmp(stbi__hdr_gettoken(s,buffer), "#?RADIANCE") != 0)
- return stbi__errpf("not HDR", "Corrupt HDR image");
-
- // Parse header
- for(;;) {
- token = stbi__hdr_gettoken(s,buffer);
- if (token[0] == 0) break;
- if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
- }
-
- if (!valid) return stbi__errpf("unsupported format", "Unsupported HDR format");
-
- // Parse width and height
- // can't use sscanf() if we're not using stdio!
- token = stbi__hdr_gettoken(s,buffer);
- if (strncmp(token, "-Y ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format");
- token += 3;
- height = (int) strtol(token, &token, 10);
- while (*token == ' ') ++token;
- if (strncmp(token, "+X ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format");
- token += 3;
- width = (int) strtol(token, NULL, 10);
-
- *x = width;
- *y = height;
-
- if (comp) *comp = 3;
- if (req_comp == 0) req_comp = 3;
-
- // Read data
- hdr_data = (float *) malloc(height * width * req_comp * sizeof(float));
-
- // Load image data
- // image data is stored as some number of sca
- if ( width < 8 || width >= 32768) {
- // Read flat data
- for (j=0; j < height; ++j) {
- for (i=0; i < width; ++i) {
- stbi_uc rgbe[4];
- main_decode_loop:
- stbi__getn(s, rgbe, 4);
- stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp);
- }
- }
- } else {
- // Read RLE-encoded data
- scanline = NULL;
-
- for (j = 0; j < height; ++j) {
- c1 = stbi__get8(s);
- c2 = stbi__get8(s);
- len = stbi__get8(s);
- if (c1 != 2 || c2 != 2 || (len & 0x80)) {
- // not run-length encoded, so we have to actually use THIS data as a decoded
- // pixel (note this can't be a valid pixel--one of RGB must be >= 128)
- stbi_uc rgbe[4];
- rgbe[0] = (stbi_uc) c1;
- rgbe[1] = (stbi_uc) c2;
- rgbe[2] = (stbi_uc) len;
- rgbe[3] = (stbi_uc) stbi__get8(s);
- stbi__hdr_convert(hdr_data, rgbe, req_comp);
- i = 1;
- j = 0;
- free(scanline);
- goto main_decode_loop; // yes, this makes no sense
- }
- len <<= 8;
- len |= stbi__get8(s);
- if (len != width) { free(hdr_data); free(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); }
- if (scanline == NULL) scanline = (stbi_uc *) malloc(width * 4);
-
- for (k = 0; k < 4; ++k) {
- i = 0;
- while (i < width) {
- count = stbi__get8(s);
- if (count > 128) {
- // Run
- value = stbi__get8(s);
- count -= 128;
- for (z = 0; z < count; ++z)
- scanline[i++ * 4 + k] = value;
- } else {
- // Dump
- for (z = 0; z < count; ++z)
- scanline[i++ * 4 + k] = stbi__get8(s);
- }
- }
- }
- for (i=0; i < width; ++i)
- stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp);
- }
- free(scanline);
- }
-
- return hdr_data;
-}
-
-static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp)
-{
- char buffer[STBI__HDR_BUFLEN];
- char *token;
- int valid = 0;
-
- if (strcmp(stbi__hdr_gettoken(s,buffer), "#?RADIANCE") != 0) {
- stbi__rewind( s );
- return 0;
- }
-
- for(;;) {
- token = stbi__hdr_gettoken(s,buffer);
- if (token[0] == 0) break;
- if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
- }
-
- if (!valid) {
- stbi__rewind( s );
- return 0;
- }
- token = stbi__hdr_gettoken(s,buffer);
- if (strncmp(token, "-Y ", 3)) {
- stbi__rewind( s );
- return 0;
- }
- token += 3;
- *y = (int) strtol(token, &token, 10);
- while (*token == ' ') ++token;
- if (strncmp(token, "+X ", 3)) {
- stbi__rewind( s );
- return 0;
- }
- token += 3;
- *x = (int) strtol(token, NULL, 10);
- *comp = 3;
- return 1;
-}
-#endif // STBI_NO_HDR
-
-static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp)
-{
- int hsz;
- if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') {
- stbi__rewind( s );
- return 0;
- }
- stbi__skip(s,12);
- hsz = stbi__get32le(s);
- if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) {
- stbi__rewind( s );
- return 0;
- }
- if (hsz == 12) {
- *x = stbi__get16le(s);
- *y = stbi__get16le(s);
- } else {
- *x = stbi__get32le(s);
- *y = stbi__get32le(s);
- }
- if (stbi__get16le(s) != 1) {
- stbi__rewind( s );
- return 0;
- }
- *comp = stbi__get16le(s) / 8;
- return 1;
-}
-
-static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp)
-{
- int channelCount;
- if (stbi__get32be(s) != 0x38425053) {
- stbi__rewind( s );
- return 0;
- }
- if (stbi__get16be(s) != 1) {
- stbi__rewind( s );
- return 0;
- }
- stbi__skip(s, 6);
- channelCount = stbi__get16be(s);
- if (channelCount < 0 || channelCount > 16) {
- stbi__rewind( s );
- return 0;
- }
- *y = stbi__get32be(s);
- *x = stbi__get32be(s);
- if (stbi__get16be(s) != 8) {
- stbi__rewind( s );
- return 0;
- }
- if (stbi__get16be(s) != 3) {
- stbi__rewind( s );
- return 0;
- }
- *comp = 4;
- return 1;
-}
-
-static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp)
-{
- int act_comp=0,num_packets=0,chained;
- stbi__pic_packet packets[10];
-
- stbi__skip(s, 92);
-
- *x = stbi__get16be(s);
- *y = stbi__get16be(s);
- if (stbi__at_eof(s)) return 0;
- if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) {
- stbi__rewind( s );
- return 0;
- }
-
- stbi__skip(s, 8);
-
- do {
- stbi__pic_packet *packet;
-
- if (num_packets==sizeof(packets)/sizeof(packets[0]))
- return 0;
-
- packet = &packets[num_packets++];
- chained = stbi__get8(s);
- packet->size = stbi__get8(s);
- packet->type = stbi__get8(s);
- packet->channel = stbi__get8(s);
- act_comp |= packet->channel;
-
- if (stbi__at_eof(s)) {
- stbi__rewind( s );
- return 0;
- }
- if (packet->size != 8) {
- stbi__rewind( s );
- return 0;
- }
- } while (chained);
-
- *comp = (act_comp & 0x10 ? 4 : 3);
-
- return 1;
-}
-
-static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp)
-{
- if (stbi__jpeg_info(s, x, y, comp))
- return 1;
- if (stbi__png_info(s, x, y, comp))
- return 1;
- if (stbi__gif_info(s, x, y, comp))
- return 1;
- if (stbi__bmp_info(s, x, y, comp))
- return 1;
- if (stbi__psd_info(s, x, y, comp))
- return 1;
- if (stbi__pic_info(s, x, y, comp))
- return 1;
- #ifndef STBI_NO_HDR
- if (stbi__hdr_info(s, x, y, comp))
- return 1;
- #endif
- // test tga last because it's a crappy test!
- if (stbi__tga_info(s, x, y, comp))
- return 1;
- return stbi__err("unknown image type", "Image not of any known type, or corrupt");
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
-{
- FILE *f = fopen(filename, "rb");
- int result;
- if (!f) return stbi__err("can't fopen", "Unable to open file");
- result = stbi_info_from_file(f, x, y, comp);
- fclose(f);
- return result;
-}
-
-STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp)
-{
- int r;
- stbi__context s;
- long pos = ftell(f);
- stbi__start_file(&s, f);
- r = stbi__info_main(&s,x,y,comp);
- fseek(f,pos,SEEK_SET);
- return r;
-}
-#endif // !STBI_NO_STDIO
-
-STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
-{
- stbi__context s;
- stbi__start_mem(&s,buffer,len);
- return stbi__info_main(&s,x,y,comp);
-}
-
-STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
-{
- stbi__context s;
- stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
- return stbi__info_main(&s,x,y,comp);
-}
-
-#endif // STB_IMAGE_IMPLEMENTATION
-
-#if !defined(STBI_NO_STDIO) && defined(_MSC_VER) && _MSC_VER >= 1400
-#pragma warning(pop)
-#endif
-
-
-/*
- revision history:
- 1.39 (2014-06-15)
- fix to TGA optimization when req_comp != number of components in TGA;
- fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite)
- add support for BMP version 5 (more ignored fields)
- 1.38 (2014-06-06)
- suppress MSVC warnings on integer casts truncating values
- fix accidental rename of 'skip' field of I/O
- 1.37 (2014-06-04)
- remove duplicate typedef
- 1.36 (2014-06-03)
- convert to header file single-file library
- if de-iphone isn't set, load iphone images color-swapped instead of returning NULL
- 1.35 (2014-05-27)
- various warnings
- fix broken STBI_SIMD path
- fix bug where stbi_load_from_file no longer left file pointer in correct place
- fix broken non-easy path for 32-bit BMP (possibly never used)
- TGA optimization by Arseny Kapoulkine
- 1.34 (unknown)
- use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case
- 1.33 (2011-07-14)
- make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements
- 1.32 (2011-07-13)
- support for "info" function for all supported filetypes (SpartanJ)
- 1.31 (2011-06-20)
- a few more leak fixes, bug in PNG handling (SpartanJ)
- 1.30 (2011-06-11)
- added ability to load files via callbacks to accomidate custom input streams (Ben Wenger)
- removed deprecated format-specific test/load functions
- removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway
- error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha)
- fix inefficiency in decoding 32-bit BMP (David Woo)
- 1.29 (2010-08-16)
- various warning fixes from Aurelien Pocheville
- 1.28 (2010-08-01)
- fix bug in GIF palette transparency (SpartanJ)
- 1.27 (2010-08-01)
- cast-to-stbi_uc to fix warnings
- 1.26 (2010-07-24)
- fix bug in file buffering for PNG reported by SpartanJ
- 1.25 (2010-07-17)
- refix trans_data warning (Won Chun)
- 1.24 (2010-07-12)
- perf improvements reading from files on platforms with lock-heavy fgetc()
- minor perf improvements for jpeg
- deprecated type-specific functions so we'll get feedback if they're needed
- attempt to fix trans_data warning (Won Chun)
- 1.23 fixed bug in iPhone support
- 1.22 (2010-07-10)
- removed image *writing* support
- stbi_info support from Jetro Lauha
- GIF support from Jean-Marc Lienher
- iPhone PNG-extensions from James Brown
- warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva)
- 1.21 fix use of 'stbi_uc' in header (reported by jon blow)
- 1.20 added support for Softimage PIC, by Tom Seddon
- 1.19 bug in interlaced PNG corruption check (found by ryg)
- 1.18 2008-08-02
- fix a threading bug (local mutable static)
- 1.17 support interlaced PNG
- 1.16 major bugfix - stbi__convert_format converted one too many pixels
- 1.15 initialize some fields for thread safety
- 1.14 fix threadsafe conversion bug
- header-file-only version (#define STBI_HEADER_FILE_ONLY before including)
- 1.13 threadsafe
- 1.12 const qualifiers in the API
- 1.11 Support installable IDCT, colorspace conversion routines
- 1.10 Fixes for 64-bit (don't use "unsigned long")
- optimized upsampling by Fabian "ryg" Giesen
- 1.09 Fix format-conversion for PSD code (bad global variables!)
- 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz
- 1.07 attempt to fix C++ warning/errors again
- 1.06 attempt to fix C++ warning/errors again
- 1.05 fix TGA loading to return correct *comp and use good luminance calc
- 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free
- 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR
- 1.02 support for (subset of) HDR files, float interface for preferred access to them
- 1.01 fix bug: possible bug in handling right-side up bmps... not sure
- fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all
- 1.00 interface to zlib that skips zlib header
- 0.99 correct handling of alpha in palette
- 0.98 TGA loader by lonesock; dynamically add loaders (untested)
- 0.97 jpeg errors on too large a file; also catch another malloc failure
- 0.96 fix detection of invalid v value - particleman@mollyrocket forum
- 0.95 during header scan, seek to markers in case of padding
- 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same
- 0.93 handle jpegtran output; verbose errors
- 0.92 read 4,8,16,24,32-bit BMP files of several formats
- 0.91 output 24-bit Windows 3.0 BMP files
- 0.90 fix a few more warnings; bump version number to approach 1.0
- 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd
- 0.60 fix compiling as c++
- 0.59 fix warnings: merge Dave Moore's -Wall fixes
- 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian
- 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available
- 0.56 fix bug: zlib uncompressed mode len vs. nlen
- 0.55 fix bug: restart_interval not initialized to 0
- 0.54 allow NULL for 'int *comp'
- 0.53 fix bug in png 3->4; speedup png decoding
- 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments
- 0.51 obey req_comp requests, 1-component jpegs return as 1-component,
- on 'test' only check type, not whether we support this variant
- 0.50 first released version
-*/
diff --git a/dgl/src/nanovg2/stb_truetype.h b/dgl/src/nanovg2/stb_truetype.h
@@ -1,2081 +0,0 @@
-// stb_truetype.h - v0.8 - public domain
-// authored from 2009-2013 by Sean Barrett / RAD Game Tools
-//
-// This library processes TrueType files:
-// parse files
-// extract glyph metrics
-// extract glyph shapes
-// render glyphs to one-channel bitmaps with antialiasing (box filter)
-//
-// Todo:
-// non-MS cmaps
-// crashproof on bad data
-// hinting? (no longer patented)
-// cleartype-style AA?
-// optimize: use simple memory allocator for intermediates
-// optimize: build edge-list directly from curves
-// optimize: rasterize directly from curves?
-//
-// ADDITIONAL CONTRIBUTORS
-//
-// Mikko Mononen: compound shape support, more cmap formats
-// Tor Andersson: kerning, subpixel rendering
-//
-// Bug/warning reports:
-// "Zer" on mollyrocket (with fix)
-// Cass Everitt
-// stoiko (Haemimont Games)
-// Brian Hook
-// Walter van Niftrik
-// David Gow
-// David Given
-// Ivan-Assen Ivanov
-// Anthony Pesch
-//
-// VERSION HISTORY
-//
-// 0.8 (2014-05-25) fix a few more warnings
-// 0.7 (2013-09-25) bugfix: subpixel glyph bug fixed in 0.5 had come back
-// 0.6c (2012-07-24) improve documentation
-// 0.6b (2012-07-20) fix a few more warnings
-// 0.6 (2012-07-17) fix warnings; added stbtt_ScaleForMappingEmToPixels,
-// stbtt_GetFontBoundingBox, stbtt_IsGlyphEmpty
-// 0.5 (2011-12-09) bugfixes:
-// subpixel glyph renderer computed wrong bounding box
-// first vertex of shape can be off-curve (FreeSans)
-// 0.4b (2011-12-03) fixed an error in the font baking example
-// 0.4 (2011-12-01) kerning, subpixel rendering (tor)
-// bugfixes for:
-// codepoint-to-glyph conversion using table fmt=12
-// codepoint-to-glyph conversion using table fmt=4
-// stbtt_GetBakedQuad with non-square texture (Zer)
-// updated Hello World! sample to use kerning and subpixel
-// fixed some warnings
-// 0.3 (2009-06-24) cmap fmt=12, compound shapes (MM)
-// userdata, malloc-from-userdata, non-zero fill (STB)
-// 0.2 (2009-03-11) Fix unsigned/signed char warnings
-// 0.1 (2009-03-09) First public release
-//
-// LICENSE
-//
-// This software is in the public domain. Where that dedication is not
-// recognized, you are granted a perpetual, irrevokable license to copy
-// and modify this file as you see fit.
-//
-// USAGE
-//
-// Include this file in whatever places neeed to refer to it. In ONE C/C++
-// file, write:
-// #define STB_TRUETYPE_IMPLEMENTATION
-// before the #include of this file. This expands out the actual
-// implementation into that C/C++ file.
-//
-// Simple 3D API (don't ship this, but it's fine for tools and quick start,
-// and you can cut and paste from it to move to more advanced)
-// stbtt_BakeFontBitmap() -- bake a font to a bitmap for use as texture
-// stbtt_GetBakedQuad() -- compute quad to draw for a given char
-//
-// "Load" a font file from a memory buffer (you have to keep the buffer loaded)
-// stbtt_InitFont()
-// stbtt_GetFontOffsetForIndex() -- use for TTC font collections
-//
-// Render a unicode codepoint to a bitmap
-// stbtt_GetCodepointBitmap() -- allocates and returns a bitmap
-// stbtt_MakeCodepointBitmap() -- renders into bitmap you provide
-// stbtt_GetCodepointBitmapBox() -- how big the bitmap must be
-//
-// Character advance/positioning
-// stbtt_GetCodepointHMetrics()
-// stbtt_GetFontVMetrics()
-// stbtt_GetCodepointKernAdvance()
-//
-// ADDITIONAL DOCUMENTATION
-//
-// Immediately after this block comment are a series of sample programs.
-//
-// After the sample programs is the "header file" section. This section
-// includes documentation for each API function.
-//
-// Some important concepts to understand to use this library:
-//
-// Codepoint
-// Characters are defined by unicode codepoints, e.g. 65 is
-// uppercase A, 231 is lowercase c with a cedilla, 0x7e30 is
-// the hiragana for "ma".
-//
-// Glyph
-// A visual character shape (every codepoint is rendered as
-// some glyph)
-//
-// Glyph index
-// A font-specific integer ID representing a glyph
-//
-// Baseline
-// Glyph shapes are defined relative to a baseline, which is the
-// bottom of uppercase characters. Characters extend both above
-// and below the baseline.
-//
-// Current Point
-// As you draw text to the screen, you keep track of a "current point"
-// which is the origin of each character. The current point's vertical
-// position is the baseline. Even "baked fonts" use this model.
-//
-// Vertical Font Metrics
-// The vertical qualities of the font, used to vertically position
-// and space the characters. See docs for stbtt_GetFontVMetrics.
-//
-// Font Size in Pixels or Points
-// The preferred interface for specifying font sizes in stb_truetype
-// is to specify how tall the font's vertical extent should be in pixels.
-// If that sounds good enough, skip the next paragraph.
-//
-// Most font APIs instead use "points", which are a common typographic
-// measurement for describing font size, defined as 72 points per inch.
-// stb_truetype provides a point API for compatibility. However, true
-// "per inch" conventions don't make much sense on computer displays
-// since they different monitors have different number of pixels per
-// inch. For example, Windows traditionally uses a convention that
-// there are 96 pixels per inch, thus making 'inch' measurements have
-// nothing to do with inches, and thus effectively defining a point to
-// be 1.333 pixels. Additionally, the TrueType font data provides
-// an explicit scale factor to scale a given font's glyphs to points,
-// but the author has observed that this scale factor is often wrong
-// for non-commercial fonts, thus making fonts scaled in points
-// according to the TrueType spec incoherently sized in practice.
-//
-// ADVANCED USAGE
-//
-// Quality:
-//
-// - Use the functions with Subpixel at the end to allow your characters
-// to have subpixel positioning. Since the font is anti-aliased, not
-// hinted, this is very import for quality. (This is not possible with
-// baked fonts.)
-//
-// - Kerning is now supported, and if you're supporting subpixel rendering
-// then kerning is worth using to give your text a polished look.
-//
-// Performance:
-//
-// - Convert Unicode codepoints to glyph indexes and operate on the glyphs;
-// if you don't do this, stb_truetype is forced to do the conversion on
-// every call.
-//
-// - There are a lot of memory allocations. We should modify it to take
-// a temp buffer and allocate from the temp buffer (without freeing),
-// should help performance a lot.
-//
-// NOTES
-//
-// The system uses the raw data found in the .ttf file without changing it
-// and without building auxiliary data structures. This is a bit inefficient
-// on little-endian systems (the data is big-endian), but assuming you're
-// caching the bitmaps or glyph shapes this shouldn't be a big deal.
-//
-// It appears to be very hard to programmatically determine what font a
-// given file is in a general way. I provide an API for this, but I don't
-// recommend it.
-//
-//
-// SOURCE STATISTICS (based on v0.6c, 2050 LOC)
-//
-// Documentation & header file 520 LOC \___ 660 LOC documentation
-// Sample code 140 LOC /
-// Truetype parsing 620 LOC ---- 620 LOC TrueType
-// Software rasterization 240 LOC \ .
-// Curve tesselation 120 LOC \__ 550 LOC Bitmap creation
-// Bitmap management 100 LOC /
-// Baked bitmap interface 70 LOC /
-// Font name matching & access 150 LOC ---- 150
-// C runtime library abstraction 60 LOC ---- 60
-
-
-//////////////////////////////////////////////////////////////////////////////
-//////////////////////////////////////////////////////////////////////////////
-////
-//// SAMPLE PROGRAMS
-////
-//
-// Incomplete text-in-3d-api example, which draws quads properly aligned to be lossless
-//
-#if 0
-#define STB_TRUETYPE_IMPLEMENTATION // force following include to generate implementation
-#include "stb_truetype.h"
-
-char ttf_buffer[1<<20];
-unsigned char temp_bitmap[512*512];
-
-stbtt_bakedchar cdata[96]; // ASCII 32..126 is 95 glyphs
-GLstbtt_uint ftex;
-
-void my_stbtt_initfont(void)
-{
- fread(ttf_buffer, 1, 1<<20, fopen("c:/windows/fonts/times.ttf", "rb"));
- stbtt_BakeFontBitmap(data,0, 32.0, temp_bitmap,512,512, 32,96, cdata); // no guarantee this fits!
- // can free ttf_buffer at this point
- glGenTextures(1, &ftex);
- glBindTexture(GL_TEXTURE_2D, ftex);
- glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 512,512, 0, GL_ALPHA, GL_UNSIGNED_BYTE, temp_bitmap);
- // can free temp_bitmap at this point
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-}
-
-void my_stbtt_print(float x, float y, char *text)
-{
- // assume orthographic projection with units = screen pixels, origin at top left
- glBindTexture(GL_TEXTURE_2D, ftex);
- glBegin(GL_QUADS);
- while (*text) {
- if (*text >= 32 && *text < 128) {
- stbtt_aligned_quad q;
- stbtt_GetBakedQuad(cdata, 512,512, *text-32, &x,&y,&q,1);//1=opengl & d3d10+,0=d3d9
- glTexCoord2f(q.s0,q.t1); glVertex2f(q.x0,q.y0);
- glTexCoord2f(q.s1,q.t1); glVertex2f(q.x1,q.y0);
- glTexCoord2f(q.s1,q.t0); glVertex2f(q.x1,q.y1);
- glTexCoord2f(q.s0,q.t0); glVertex2f(q.x0,q.y1);
- }
- ++text;
- }
- glEnd();
-}
-#endif
-//
-//
-//////////////////////////////////////////////////////////////////////////////
-//
-// Complete program (this compiles): get a single bitmap, print as ASCII art
-//
-#if 0
-#include <stdio.h>
-#define STB_TRUETYPE_IMPLEMENTATION // force following include to generate implementation
-#include "stb_truetype.h"
-
-char ttf_buffer[1<<25];
-
-int main(int argc, char **argv)
-{
- stbtt_fontinfo font;
- unsigned char *bitmap;
- int w,h,i,j,c = (argc > 1 ? atoi(argv[1]) : 'a'), s = (argc > 2 ? atoi(argv[2]) : 20);
-
- fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/windows/fonts/arialbd.ttf", "rb"));
-
- stbtt_InitFont(&font, ttf_buffer, stbtt_GetFontOffsetForIndex(ttf_buffer,0));
- bitmap = stbtt_GetCodepointBitmap(&font, 0,stbtt_ScaleForPixelHeight(&font, s), c, &w, &h, 0,0);
-
- for (j=0; j < h; ++j) {
- for (i=0; i < w; ++i)
- putchar(" .:ioVM@"[bitmap[j*w+i]>>5]);
- putchar('\n');
- }
- return 0;
-}
-#endif
-//
-// Output:
-//
-// .ii.
-// @@@@@@.
-// V@Mio@@o
-// :i. V@V
-// :oM@@M
-// :@@@MM@M
-// @@o o@M
-// :@@. M@M
-// @@@o@@@@
-// :M@@V:@@.
-//
-//////////////////////////////////////////////////////////////////////////////
-//
-// Complete program: print "Hello World!" banner, with bugs
-//
-#if 0
-char buffer[24<<20];
-unsigned char screen[20][79];
-
-int main(int arg, char **argv)
-{
- stbtt_fontinfo font;
- int i,j,ascent,baseline,ch=0;
- float scale, xpos=2; // leave a little padding in case the character extends left
- char *text = "Heljo World!";
-
- fread(buffer, 1, 1000000, fopen("c:/windows/fonts/arialbd.ttf", "rb"));
- stbtt_InitFont(&font, buffer, 0);
-
- scale = stbtt_ScaleForPixelHeight(&font, 15);
- stbtt_GetFontVMetrics(&font, &ascent,0,0);
- baseline = (int) (ascent*scale);
-
- while (text[ch]) {
- int advance,lsb,x0,y0,x1,y1;
- float x_shift = xpos - (float) floor(xpos);
- stbtt_GetCodepointHMetrics(&font, text[ch], &advance, &lsb);
- stbtt_GetCodepointBitmapBoxSubpixel(&font, text[ch], scale,scale,x_shift,0, &x0,&y0,&x1,&y1);
- stbtt_MakeCodepointBitmapSubpixel(&font, &screen[baseline + y0][(int) xpos + x0], x1-x0,y1-y0, 79, scale,scale,x_shift,0, text[ch]);
- // note that this stomps the old data, so where character boxes overlap (e.g. 'lj') it's wrong
- // because this API is really for baking character bitmaps into textures. if you want to render
- // a sequence of characters, you really need to render each bitmap to a temp buffer, then
- // "alpha blend" that into the working buffer
- xpos += (advance * scale);
- if (text[ch+1])
- xpos += scale*stbtt_GetCodepointKernAdvance(&font, text[ch],text[ch+1]);
- ++ch;
- }
-
- for (j=0; j < 20; ++j) {
- for (i=0; i < 78; ++i)
- putchar(" .:ioVM@"[screen[j][i]>>5]);
- putchar('\n');
- }
-
- return 0;
-}
-#endif
-
-
-//////////////////////////////////////////////////////////////////////////////
-//////////////////////////////////////////////////////////////////////////////
-////
-//// INTEGRATION WITH YOUR CODEBASE
-////
-//// The following sections allow you to supply alternate definitions
-//// of C library functions used by stb_truetype.
-
-#ifdef STB_TRUETYPE_IMPLEMENTATION
- // #define your own (u)stbtt_int8/16/32 before including to override this
- #ifndef stbtt_uint8
- typedef unsigned char stbtt_uint8;
- typedef signed char stbtt_int8;
- typedef unsigned short stbtt_uint16;
- typedef signed short stbtt_int16;
- typedef unsigned int stbtt_uint32;
- typedef signed int stbtt_int32;
- #endif
-
- typedef char stbtt__check_size32[sizeof(stbtt_int32)==4 ? 1 : -1];
- typedef char stbtt__check_size16[sizeof(stbtt_int16)==2 ? 1 : -1];
-
- // #define your own STBTT_sort() to override this to avoid qsort
- #ifndef STBTT_sort
- #include <stdlib.h>
- #define STBTT_sort(data,num_items,item_size,compare_func) qsort(data,num_items,item_size,compare_func)
- #endif
-
- // #define your own STBTT_ifloor/STBTT_iceil() to avoid math.h
- #ifndef STBTT_ifloor
- #include <math.h>
- #define STBTT_ifloor(x) ((int) floor(x))
- #define STBTT_iceil(x) ((int) ceil(x))
- #endif
-
- #ifndef STBTT_sqrt
- #include <math.h>
- #define STBTT_sqrt(x) sqrt(x)
- #endif
-
- // #define your own functions "STBTT_malloc" / "STBTT_free" to avoid malloc.h
- #ifndef STBTT_malloc
- #include <stdlib.h>
- #define STBTT_malloc(x,u) ((void)(u),malloc(x))
- #define STBTT_free(x,u) free(x)
- #endif
-
- #ifndef STBTT_assert
- #include <assert.h>
- #define STBTT_assert(x) assert(x)
- #endif
-
- #ifndef STBTT_strlen
- #include <string.h>
- #define STBTT_strlen(x) strlen(x)
- #endif
-
- #ifndef STBTT_memcpy
- #include <memory.h>
- #define STBTT_memcpy memcpy
- #define STBTT_memset memset
- #endif
-#endif
-
-///////////////////////////////////////////////////////////////////////////////
-///////////////////////////////////////////////////////////////////////////////
-////
-//// INTERFACE
-////
-////
-
-#ifndef __STB_INCLUDE_STB_TRUETYPE_H__
-#define __STB_INCLUDE_STB_TRUETYPE_H__
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// TEXTURE BAKING API
-//
-// If you use this API, you only have to call two functions ever.
-//
-
-typedef struct
-{
- unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap
- float xoff,yoff,xadvance;
-} stbtt_bakedchar;
-
-extern int stbtt_BakeFontBitmap(const unsigned char *data, int offset, // font location (use offset=0 for plain .ttf)
- float pixel_height, // height of font in pixels
- unsigned char *pixels, int pw, int ph, // bitmap to be filled in
- int first_char, int num_chars, // characters to bake
- stbtt_bakedchar *chardata); // you allocate this, it's num_chars long
-// if return is positive, the first unused row of the bitmap
-// if return is negative, returns the negative of the number of characters that fit
-// if return is 0, no characters fit and no rows were used
-// This uses a very crappy packing.
-
-typedef struct
-{
- float x0,y0,s0,t0; // top-left
- float x1,y1,s1,t1; // bottom-right
-} stbtt_aligned_quad;
-
-extern void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, // same data as above
- int char_index, // character to display
- float *xpos, float *ypos, // pointers to current position in screen pixel space
- stbtt_aligned_quad *q, // output: quad to draw
- int opengl_fillrule); // true if opengl fill rule; false if DX9 or earlier
-// Call GetBakedQuad with char_index = 'character - first_char', and it
-// creates the quad you need to draw and advances the current position.
-//
-// The coordinate system used assumes y increases downwards.
-//
-// Characters will extend both above and below the current position;
-// see discussion of "BASELINE" above.
-//
-// It's inefficient; you might want to c&p it and optimize it.
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// FONT LOADING
-//
-//
-
-extern int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index);
-// Each .ttf/.ttc file may have more than one font. Each font has a sequential
-// index number starting from 0. Call this function to get the font offset for
-// a given index; it returns -1 if the index is out of range. A regular .ttf
-// file will only define one font and it always be at offset 0, so it will
-// return '0' for index 0, and -1 for all other indices. You can just skip
-// this step if you know it's that kind of font.
-
-
-// The following structure is defined publically so you can declare one on
-// the stack or as a global or etc, but you should treat it as opaque.
-typedef struct stbtt_fontinfo
-{
- void * userdata;
- unsigned char * data; // pointer to .ttf file
- int fontstart; // offset of start of font
-
- int numGlyphs; // number of glyphs, needed for range checking
-
- int loca,head,glyf,hhea,hmtx,kern; // table locations as offset from start of .ttf
- int index_map; // a cmap mapping for our chosen character encoding
- int indexToLocFormat; // format needed to map from glyph index to glyph
-} stbtt_fontinfo;
-
-extern int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset);
-// Given an offset into the file that defines a font, this function builds
-// the necessary cached info for the rest of the system. You must allocate
-// the stbtt_fontinfo yourself, and stbtt_InitFont will fill it out. You don't
-// need to do anything special to free it, because the contents are pure
-// value data with no additional data structures. Returns 0 on failure.
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// CHARACTER TO GLYPH-INDEX CONVERSIOn
-
-int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint);
-// If you're going to perform multiple operations on the same character
-// and you want a speed-up, call this function with the character you're
-// going to process, then use glyph-based functions instead of the
-// codepoint-based functions.
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// CHARACTER PROPERTIES
-//
-
-extern float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float pixels);
-// computes a scale factor to produce a font whose "height" is 'pixels' tall.
-// Height is measured as the distance from the highest ascender to the lowest
-// descender; in other words, it's equivalent to calling stbtt_GetFontVMetrics
-// and computing:
-// scale = pixels / (ascent - descent)
-// so if you prefer to measure height by the ascent only, use a similar calculation.
-
-extern float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels);
-// computes a scale factor to produce a font whose EM size is mapped to
-// 'pixels' tall. This is probably what traditional APIs compute, but
-// I'm not positive.
-
-extern void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap);
-// ascent is the coordinate above the baseline the font extends; descent
-// is the coordinate below the baseline the font extends (i.e. it is typically negative)
-// lineGap is the spacing between one row's descent and the next row's ascent...
-// so you should advance the vertical position by "*ascent - *descent + *lineGap"
-// these are expressed in unscaled coordinates, so you must multiply by
-// the scale factor for a given size
-
-extern void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1);
-// the bounding box around all possible characters
-
-extern void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing);
-// leftSideBearing is the offset from the current horizontal position to the left edge of the character
-// advanceWidth is the offset from the current horizontal position to the next horizontal position
-// these are expressed in unscaled coordinates
-
-extern int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2);
-// an additional amount to add to the 'advance' value between ch1 and ch2
-
-extern int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1);
-// Gets the bounding box of the visible part of the glyph, in unscaled coordinates
-
-extern void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing);
-extern int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2);
-extern int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1);
-// as above, but takes one or more glyph indices for greater efficiency
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// GLYPH SHAPES (you probably don't need these, but they have to go before
-// the bitmaps for C declaration-order reasons)
-//
-
-#ifndef STBTT_vmove // you can predefine these to use different values (but why?)
- enum {
- STBTT_vmove=1,
- STBTT_vline,
- STBTT_vcurve
- };
-#endif
-
-#ifndef stbtt_vertex // you can predefine this to use different values
- // (we share this with other code at RAD)
- #define stbtt_vertex_type short // can't use stbtt_int16 because that's not visible in the header file
- typedef struct
- {
- stbtt_vertex_type x,y,cx,cy;
- unsigned char type,padding;
- } stbtt_vertex;
-#endif
-
-extern int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index);
-// returns non-zero if nothing is drawn for this glyph
-
-extern int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices);
-extern int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **vertices);
-// returns # of vertices and fills *vertices with the pointer to them
-// these are expressed in "unscaled" coordinates
-//
-// The shape is a series of countours. Each one starts with
-// a STBTT_moveto, then consists of a series of mixed
-// STBTT_lineto and STBTT_curveto segments. A lineto
-// draws a line from previous endpoint to its x,y; a curveto
-// draws a quadratic bezier from previous endpoint to
-// its x,y, using cx,cy as the bezier control point.
-
-extern void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *vertices);
-// frees the data allocated above
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// BITMAP RENDERING
-//
-
-extern void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata);
-// frees the bitmap allocated below
-
-extern unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
-// allocates a large-enough single-channel 8bpp bitmap and renders the
-// specified character/glyph at the specified scale into it, with
-// antialiasing. 0 is no coverage (transparent), 255 is fully covered (opaque).
-// *width & *height are filled out with the width & height of the bitmap,
-// which is stored left-to-right, top-to-bottom.
-//
-// xoff/yoff are the offset it pixel space from the glyph origin to the top-left of the bitmap
-
-extern unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
-// the same as stbtt_GetCodepoitnBitmap, but you can specify a subpixel
-// shift for the character
-
-extern void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint);
-// the same as stbtt_GetCodepointBitmap, but you pass in storage for the bitmap
-// in the form of 'output', with row spacing of 'out_stride' bytes. the bitmap
-// is clipped to out_w/out_h bytes. Call stbtt_GetCodepointBitmapBox to get the
-// width and height and positioning info for it first.
-
-extern void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint);
-// same as stbtt_MakeCodepointBitmap, but you can specify a subpixel
-// shift for the character
-
-extern void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
-// get the bbox of the bitmap centered around the glyph origin; so the
-// bitmap width is ix1-ix0, height is iy1-iy0, and location to place
-// the bitmap top left is (leftSideBearing*scale,iy0).
-// (Note that the bitmap uses y-increases-down, but the shape uses
-// y-increases-up, so CodepointBitmapBox and CodepointBox are inverted.)
-
-extern void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);
-// same as stbtt_GetCodepointBitmapBox, but you can specify a subpixel
-// shift for the character
-
-// the following functions are equivalent to the above functions, but operate
-// on glyph indices instead of Unicode codepoints (for efficiency)
-extern unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff);
-extern unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff);
-extern void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph);
-extern void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph);
-extern void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
-extern void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);
-
-
-// @TODO: don't expose this structure
-typedef struct
-{
- int w,h,stride;
- unsigned char *pixels;
-} stbtt__bitmap;
-
-extern void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata);
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// Finding the right font...
-//
-// You should really just solve this offline, keep your own tables
-// of what font is what, and don't try to get it out of the .ttf file.
-// That's because getting it out of the .ttf file is really hard, because
-// the names in the file can appear in many possible encodings, in many
-// possible languages, and e.g. if you need a case-insensitive comparison,
-// the details of that depend on the encoding & language in a complex way
-// (actually underspecified in truetype, but also gigantic).
-//
-// But you can use the provided functions in two possible ways:
-// stbtt_FindMatchingFont() will use *case-sensitive* comparisons on
-// unicode-encoded names to try to find the font you want;
-// you can run this before calling stbtt_InitFont()
-//
-// stbtt_GetFontNameString() lets you get any of the various strings
-// from the file yourself and do your own comparisons on them.
-// You have to have called stbtt_InitFont() first.
-
-
-extern int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags);
-// returns the offset (not index) of the font that matches, or -1 if none
-// if you use STBTT_MACSTYLE_DONTCARE, use a font name like "Arial Bold".
-// if you use any other flag, use a font name like "Arial"; this checks
-// the 'macStyle' header field; i don't know if fonts set this consistently
-#define STBTT_MACSTYLE_DONTCARE 0
-#define STBTT_MACSTYLE_BOLD 1
-#define STBTT_MACSTYLE_ITALIC 2
-#define STBTT_MACSTYLE_UNDERSCORE 4
-#define STBTT_MACSTYLE_NONE 8 // <= not same as 0, this makes us check the bitfield is 0
-
-extern int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2);
-// returns 1/0 whether the first string interpreted as utf8 is identical to
-// the second string interpreted as big-endian utf16... useful for strings from next func
-
-extern const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID);
-// returns the string (which may be big-endian double byte, e.g. for unicode)
-// and puts the length in bytes in *length.
-//
-// some of the values for the IDs are below; for more see the truetype spec:
-// http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6name.html
-// http://www.microsoft.com/typography/otspec/name.htm
-
-enum { // platformID
- STBTT_PLATFORM_ID_UNICODE =0,
- STBTT_PLATFORM_ID_MAC =1,
- STBTT_PLATFORM_ID_ISO =2,
- STBTT_PLATFORM_ID_MICROSOFT =3
-};
-
-enum { // encodingID for STBTT_PLATFORM_ID_UNICODE
- STBTT_UNICODE_EID_UNICODE_1_0 =0,
- STBTT_UNICODE_EID_UNICODE_1_1 =1,
- STBTT_UNICODE_EID_ISO_10646 =2,
- STBTT_UNICODE_EID_UNICODE_2_0_BMP=3,
- STBTT_UNICODE_EID_UNICODE_2_0_FULL=4
-};
-
-enum { // encodingID for STBTT_PLATFORM_ID_MICROSOFT
- STBTT_MS_EID_SYMBOL =0,
- STBTT_MS_EID_UNICODE_BMP =1,
- STBTT_MS_EID_SHIFTJIS =2,
- STBTT_MS_EID_UNICODE_FULL =10
-};
-
-enum { // encodingID for STBTT_PLATFORM_ID_MAC; same as Script Manager codes
- STBTT_MAC_EID_ROMAN =0, STBTT_MAC_EID_ARABIC =4,
- STBTT_MAC_EID_JAPANESE =1, STBTT_MAC_EID_HEBREW =5,
- STBTT_MAC_EID_CHINESE_TRAD =2, STBTT_MAC_EID_GREEK =6,
- STBTT_MAC_EID_KOREAN =3, STBTT_MAC_EID_RUSSIAN =7
-};
-
-enum { // languageID for STBTT_PLATFORM_ID_MICROSOFT; same as LCID...
- // problematic because there are e.g. 16 english LCIDs and 16 arabic LCIDs
- STBTT_MS_LANG_ENGLISH =0x0409, STBTT_MS_LANG_ITALIAN =0x0410,
- STBTT_MS_LANG_CHINESE =0x0804, STBTT_MS_LANG_JAPANESE =0x0411,
- STBTT_MS_LANG_DUTCH =0x0413, STBTT_MS_LANG_KOREAN =0x0412,
- STBTT_MS_LANG_FRENCH =0x040c, STBTT_MS_LANG_RUSSIAN =0x0419,
- STBTT_MS_LANG_GERMAN =0x0407, STBTT_MS_LANG_SPANISH =0x0409,
- STBTT_MS_LANG_HEBREW =0x040d, STBTT_MS_LANG_SWEDISH =0x041D
-};
-
-enum { // languageID for STBTT_PLATFORM_ID_MAC
- STBTT_MAC_LANG_ENGLISH =0 , STBTT_MAC_LANG_JAPANESE =11,
- STBTT_MAC_LANG_ARABIC =12, STBTT_MAC_LANG_KOREAN =23,
- STBTT_MAC_LANG_DUTCH =4 , STBTT_MAC_LANG_RUSSIAN =32,
- STBTT_MAC_LANG_FRENCH =1 , STBTT_MAC_LANG_SPANISH =6 ,
- STBTT_MAC_LANG_GERMAN =2 , STBTT_MAC_LANG_SWEDISH =5 ,
- STBTT_MAC_LANG_HEBREW =10, STBTT_MAC_LANG_CHINESE_SIMPLIFIED =33,
- STBTT_MAC_LANG_ITALIAN =3 , STBTT_MAC_LANG_CHINESE_TRAD =19
-};
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif // __STB_INCLUDE_STB_TRUETYPE_H__
-
-///////////////////////////////////////////////////////////////////////////////
-///////////////////////////////////////////////////////////////////////////////
-////
-//// IMPLEMENTATION
-////
-////
-
-#ifdef STB_TRUETYPE_IMPLEMENTATION
-
-//////////////////////////////////////////////////////////////////////////
-//
-// accessors to parse data from file
-//
-
-// on platforms that don't allow misaligned reads, if we want to allow
-// truetype fonts that aren't padded to alignment, define ALLOW_UNALIGNED_TRUETYPE
-
-#define ttBYTE(p) (* (stbtt_uint8 *) (p))
-#define ttCHAR(p) (* (stbtt_int8 *) (p))
-#define ttFixed(p) ttLONG(p)
-
-#if defined(STB_TRUETYPE_BIGENDIAN) && !defined(ALLOW_UNALIGNED_TRUETYPE)
-
- #define ttUSHORT(p) (* (stbtt_uint16 *) (p))
- #define ttSHORT(p) (* (stbtt_int16 *) (p))
- #define ttULONG(p) (* (stbtt_uint32 *) (p))
- #define ttLONG(p) (* (stbtt_int32 *) (p))
-
-#else
-
- stbtt_uint16 ttUSHORT(const stbtt_uint8 *p) { return p[0]*256 + p[1]; }
- stbtt_int16 ttSHORT(const stbtt_uint8 *p) { return p[0]*256 + p[1]; }
- stbtt_uint32 ttULONG(const stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
- stbtt_int32 ttLONG(const stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
-
-#endif
-
-#define stbtt_tag4(p,c0,c1,c2,c3) ((p)[0] == (c0) && (p)[1] == (c1) && (p)[2] == (c2) && (p)[3] == (c3))
-#define stbtt_tag(p,str) stbtt_tag4(p,str[0],str[1],str[2],str[3])
-
-static int stbtt__isfont(const stbtt_uint8 *font)
-{
- // check the version number
- if (stbtt_tag4(font, '1',0,0,0)) return 1; // TrueType 1
- if (stbtt_tag(font, "typ1")) return 1; // TrueType with type 1 font -- we don't support this!
- if (stbtt_tag(font, "OTTO")) return 1; // OpenType with CFF
- if (stbtt_tag4(font, 0,1,0,0)) return 1; // OpenType 1.0
- return 0;
-}
-
-// @OPTIMIZE: binary search
-static stbtt_uint32 stbtt__find_table(stbtt_uint8 *data, stbtt_uint32 fontstart, const char *tag)
-{
- stbtt_int32 num_tables = ttUSHORT(data+fontstart+4);
- stbtt_uint32 tabledir = fontstart + 12;
- stbtt_int32 i;
- for (i=0; i < num_tables; ++i) {
- stbtt_uint32 loc = tabledir + 16*i;
- if (stbtt_tag(data+loc+0, tag))
- return ttULONG(data+loc+8);
- }
- return 0;
-}
-
-int stbtt_GetFontOffsetForIndex(const unsigned char *font_collection, int index)
-{
- // if it's just a font, there's only one valid index
- if (stbtt__isfont(font_collection))
- return index == 0 ? 0 : -1;
-
- // check if it's a TTC
- if (stbtt_tag(font_collection, "ttcf")) {
- // version 1?
- if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) {
- stbtt_int32 n = ttLONG(font_collection+8);
- if (index >= n)
- return -1;
- return ttULONG(font_collection+12+index*14);
- }
- }
- return -1;
-}
-
-int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data2, int fontstart)
-{
- stbtt_uint8 *data = (stbtt_uint8 *) data2;
- stbtt_uint32 cmap, t;
- stbtt_int32 i,numTables;
-
- info->data = data;
- info->fontstart = fontstart;
-
- cmap = stbtt__find_table(data, fontstart, "cmap"); // required
- info->loca = stbtt__find_table(data, fontstart, "loca"); // required
- info->head = stbtt__find_table(data, fontstart, "head"); // required
- info->glyf = stbtt__find_table(data, fontstart, "glyf"); // required
- info->hhea = stbtt__find_table(data, fontstart, "hhea"); // required
- info->hmtx = stbtt__find_table(data, fontstart, "hmtx"); // required
- info->kern = stbtt__find_table(data, fontstart, "kern"); // not required
- if (!cmap || !info->loca || !info->head || !info->glyf || !info->hhea || !info->hmtx)
- return 0;
-
- t = stbtt__find_table(data, fontstart, "maxp");
- if (t)
- info->numGlyphs = ttUSHORT(data+t+4);
- else
- info->numGlyphs = 0xffff;
-
- // find a cmap encoding table we understand *now* to avoid searching
- // later. (todo: could make this installable)
- // the same regardless of glyph.
- numTables = ttUSHORT(data + cmap + 2);
- info->index_map = 0;
- for (i=0; i < numTables; ++i) {
- stbtt_uint32 encoding_record = cmap + 4 + 8 * i;
- // find an encoding we understand:
- switch(ttUSHORT(data+encoding_record)) {
- case STBTT_PLATFORM_ID_MICROSOFT:
- switch (ttUSHORT(data+encoding_record+2)) {
- case STBTT_MS_EID_UNICODE_BMP:
- case STBTT_MS_EID_UNICODE_FULL:
- // MS/Unicode
- info->index_map = cmap + ttULONG(data+encoding_record+4);
- break;
- }
- break;
- }
- }
- if (info->index_map == 0)
- return 0;
-
- info->indexToLocFormat = ttUSHORT(data+info->head + 50);
- return 1;
-}
-
-int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint)
-{
- stbtt_uint8 *data = info->data;
- stbtt_uint32 index_map = info->index_map;
-
- stbtt_uint16 format = ttUSHORT(data + index_map + 0);
- if (format == 0) { // apple byte encoding
- stbtt_int32 bytes = ttUSHORT(data + index_map + 2);
- if (unicode_codepoint < bytes-6)
- return ttBYTE(data + index_map + 6 + unicode_codepoint);
- return 0;
- } else if (format == 6) {
- stbtt_uint32 first = ttUSHORT(data + index_map + 6);
- stbtt_uint32 count = ttUSHORT(data + index_map + 8);
- if ((stbtt_uint32) unicode_codepoint >= first && (stbtt_uint32) unicode_codepoint < first+count)
- return ttUSHORT(data + index_map + 10 + (unicode_codepoint - first)*2);
- return 0;
- } else if (format == 2) {
- STBTT_assert(0); // @TODO: high-byte mapping for japanese/chinese/korean
- return 0;
- } else if (format == 4) { // standard mapping for windows fonts: binary search collection of ranges
- stbtt_uint16 segcount = ttUSHORT(data+index_map+6) >> 1;
- stbtt_uint16 searchRange = ttUSHORT(data+index_map+8) >> 1;
- stbtt_uint16 entrySelector = ttUSHORT(data+index_map+10);
- stbtt_uint16 rangeShift = ttUSHORT(data+index_map+12) >> 1;
- stbtt_uint16 item, offset, start, end;
-
- // do a binary search of the segments
- stbtt_uint32 endCount = index_map + 14;
- stbtt_uint32 search = endCount;
-
- if (unicode_codepoint > 0xffff)
- return 0;
-
- // they lie from endCount .. endCount + segCount
- // but searchRange is the nearest power of two, so...
- if (unicode_codepoint >= ttUSHORT(data + search + rangeShift*2))
- search += rangeShift*2;
-
- // now decrement to bias correctly to find smallest
- search -= 2;
- while (entrySelector) {
- searchRange >>= 1;
- start = ttUSHORT(data + search + searchRange*2 + segcount*2 + 2);
- end = ttUSHORT(data + search + searchRange*2);
- if (unicode_codepoint > end)
- search += searchRange*2;
- --entrySelector;
- }
- search += 2;
-
- item = (stbtt_uint16) ((search - endCount) >> 1);
-
- STBTT_assert(unicode_codepoint <= ttUSHORT(data + endCount + 2*item));
- start = ttUSHORT(data + index_map + 14 + segcount*2 + 2 + 2*item);
- end = ttUSHORT(data + index_map + 14 + 2 + 2*item);
- if (unicode_codepoint < start)
- return 0;
-
- offset = ttUSHORT(data + index_map + 14 + segcount*6 + 2 + 2*item);
- if (offset == 0)
- return (stbtt_uint16) (unicode_codepoint + ttSHORT(data + index_map + 14 + segcount*4 + 2 + 2*item));
-
- return ttUSHORT(data + offset + (unicode_codepoint-start)*2 + index_map + 14 + segcount*6 + 2 + 2*item);
- } else if (format == 12 || format == 13) {
- stbtt_uint32 ngroups = ttULONG(data+index_map+12);
- stbtt_int32 low,high;
- low = 0; high = (stbtt_int32)ngroups;
- // Binary search the right group.
- while (low < high) {
- stbtt_int32 mid = low + ((high-low) >> 1); // rounds down, so low <= mid < high
- stbtt_uint32 start_char = ttULONG(data+index_map+16+mid*12);
- stbtt_uint32 end_char = ttULONG(data+index_map+16+mid*12+4);
- if ((stbtt_uint32) unicode_codepoint < start_char)
- high = mid;
- else if ((stbtt_uint32) unicode_codepoint > end_char)
- low = mid+1;
- else {
- stbtt_uint32 start_glyph = ttULONG(data+index_map+16+mid*12+8);
- if (format == 12)
- return start_glyph + unicode_codepoint-start_char;
- else // format == 13
- return start_glyph;
- }
- }
- return 0; // not found
- }
- // @TODO
- STBTT_assert(0);
- return 0;
-}
-
-int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices)
-{
- return stbtt_GetGlyphShape(info, stbtt_FindGlyphIndex(info, unicode_codepoint), vertices);
-}
-
-static void stbtt_setvertex(stbtt_vertex *v, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy)
-{
- v->type = type;
- v->x = (stbtt_int16) x;
- v->y = (stbtt_int16) y;
- v->cx = (stbtt_int16) cx;
- v->cy = (stbtt_int16) cy;
-}
-
-static int stbtt__GetGlyfOffset(const stbtt_fontinfo *info, int glyph_index)
-{
- int g1,g2;
-
- if (glyph_index >= info->numGlyphs) return -1; // glyph index out of range
- if (info->indexToLocFormat >= 2) return -1; // unknown index->glyph map format
-
- if (info->indexToLocFormat == 0) {
- g1 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2) * 2;
- g2 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2 + 2) * 2;
- } else {
- g1 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4);
- g2 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4 + 4);
- }
-
- return g1==g2 ? -1 : g1; // if length is 0, return -1
-}
-
-int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1)
-{
- int g = stbtt__GetGlyfOffset(info, glyph_index);
- if (g < 0) return 0;
-
- if (x0) *x0 = ttSHORT(info->data + g + 2);
- if (y0) *y0 = ttSHORT(info->data + g + 4);
- if (x1) *x1 = ttSHORT(info->data + g + 6);
- if (y1) *y1 = ttSHORT(info->data + g + 8);
- return 1;
-}
-
-int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1)
-{
- return stbtt_GetGlyphBox(info, stbtt_FindGlyphIndex(info,codepoint), x0,y0,x1,y1);
-}
-
-int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index)
-{
- stbtt_int16 numberOfContours;
- int g = stbtt__GetGlyfOffset(info, glyph_index);
- if (g < 0) return 1;
- numberOfContours = ttSHORT(info->data + g);
- return numberOfContours == 0;
-}
-
-static int stbtt__close_shape(stbtt_vertex *vertices, int num_vertices, int was_off, int start_off,
- stbtt_int32 sx, stbtt_int32 sy, stbtt_int32 scx, stbtt_int32 scy, stbtt_int32 cx, stbtt_int32 cy)
-{
- if (start_off) {
- if (was_off)
- stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+scx)>>1, (cy+scy)>>1, cx,cy);
- stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, sx,sy,scx,scy);
- } else {
- if (was_off)
- stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve,sx,sy,cx,cy);
- else
- stbtt_setvertex(&vertices[num_vertices++], STBTT_vline,sx,sy,0,0);
- }
- return num_vertices;
-}
-
-int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
-{
- stbtt_int16 numberOfContours;
- stbtt_uint8 *endPtsOfContours;
- stbtt_uint8 *data = info->data;
- stbtt_vertex *vertices=0;
- int num_vertices=0;
- int g = stbtt__GetGlyfOffset(info, glyph_index);
-
- *pvertices = NULL;
-
- if (g < 0) return 0;
-
- numberOfContours = ttSHORT(data + g);
-
- if (numberOfContours > 0) {
- stbtt_uint8 flags=0,flagcount;
- stbtt_int32 ins, i,j=0,m,n, next_move, was_off=0, off, start_off=0;
- stbtt_int32 x,y,cx,cy,sx,sy, scx,scy;
- stbtt_uint8 *points;
- endPtsOfContours = (data + g + 10);
- ins = ttUSHORT(data + g + 10 + numberOfContours * 2);
- points = data + g + 10 + numberOfContours * 2 + 2 + ins;
-
- n = 1+ttUSHORT(endPtsOfContours + numberOfContours*2-2);
-
- m = n + 2*numberOfContours; // a loose bound on how many vertices we might need
- vertices = (stbtt_vertex *) STBTT_malloc(m * sizeof(vertices[0]), info->userdata);
- if (vertices == 0)
- return 0;
-
- next_move = 0;
- flagcount=0;
-
- // in first pass, we load uninterpreted data into the allocated array
- // above, shifted to the end of the array so we won't overwrite it when
- // we create our final data starting from the front
-
- off = m - n; // starting offset for uninterpreted data, regardless of how m ends up being calculated
-
- // first load flags
-
- for (i=0; i < n; ++i) {
- if (flagcount == 0) {
- flags = *points++;
- if (flags & 8)
- flagcount = *points++;
- } else
- --flagcount;
- vertices[off+i].type = flags;
- }
-
- // now load x coordinates
- x=0;
- for (i=0; i < n; ++i) {
- flags = vertices[off+i].type;
- if (flags & 2) {
- stbtt_int16 dx = *points++;
- x += (flags & 16) ? dx : -dx; // ???
- } else {
- if (!(flags & 16)) {
- x = x + (stbtt_int16) (points[0]*256 + points[1]);
- points += 2;
- }
- }
- vertices[off+i].x = (stbtt_int16) x;
- }
-
- // now load y coordinates
- y=0;
- for (i=0; i < n; ++i) {
- flags = vertices[off+i].type;
- if (flags & 4) {
- stbtt_int16 dy = *points++;
- y += (flags & 32) ? dy : -dy; // ???
- } else {
- if (!(flags & 32)) {
- y = y + (stbtt_int16) (points[0]*256 + points[1]);
- points += 2;
- }
- }
- vertices[off+i].y = (stbtt_int16) y;
- }
-
- // now convert them to our format
- num_vertices=0;
- sx = sy = cx = cy = scx = scy = 0;
- for (i=0; i < n; ++i) {
- flags = vertices[off+i].type;
- x = (stbtt_int16) vertices[off+i].x;
- y = (stbtt_int16) vertices[off+i].y;
-
- if (next_move == i) {
- if (i != 0)
- num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy);
-
- // now start the new one
- start_off = !(flags & 1);
- if (start_off) {
- // if we start off with an off-curve point, then when we need to find a point on the curve
- // where we can start, and we need to save some state for when we wraparound.
- scx = x;
- scy = y;
- if (!(vertices[off+i+1].type & 1)) {
- // next point is also a curve point, so interpolate an on-point curve
- sx = (x + (stbtt_int32) vertices[off+i+1].x) >> 1;
- sy = (y + (stbtt_int32) vertices[off+i+1].y) >> 1;
- } else {
- // otherwise just use the next point as our start point
- sx = (stbtt_int32) vertices[off+i+1].x;
- sy = (stbtt_int32) vertices[off+i+1].y;
- ++i; // we're using point i+1 as the starting point, so skip it
- }
- } else {
- sx = x;
- sy = y;
- }
- stbtt_setvertex(&vertices[num_vertices++], STBTT_vmove,sx,sy,0,0);
- was_off = 0;
- next_move = 1 + ttUSHORT(endPtsOfContours+j*2);
- ++j;
- } else {
- if (!(flags & 1)) { // if it's a curve
- if (was_off) // two off-curve control points in a row means interpolate an on-curve midpoint
- stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+x)>>1, (cy+y)>>1, cx, cy);
- cx = x;
- cy = y;
- was_off = 1;
- } else {
- if (was_off)
- stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, x,y, cx, cy);
- else
- stbtt_setvertex(&vertices[num_vertices++], STBTT_vline, x,y,0,0);
- was_off = 0;
- }
- }
- }
- num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy);
- } else if (numberOfContours == -1) {
- // Compound shapes.
- int more = 1;
- stbtt_uint8 *comp = data + g + 10;
- num_vertices = 0;
- vertices = 0;
- while (more) {
- stbtt_uint16 flags, gidx;
- int comp_num_verts = 0, i;
- stbtt_vertex *comp_verts = 0, *tmp = 0;
- float mtx[6] = {1,0,0,1,0,0}, m, n;
-
- flags = ttSHORT(comp); comp+=2;
- gidx = ttSHORT(comp); comp+=2;
-
- if (flags & 2) { // XY values
- if (flags & 1) { // shorts
- mtx[4] = ttSHORT(comp); comp+=2;
- mtx[5] = ttSHORT(comp); comp+=2;
- } else {
- mtx[4] = ttCHAR(comp); comp+=1;
- mtx[5] = ttCHAR(comp); comp+=1;
- }
- }
- else {
- // @TODO handle matching point
- STBTT_assert(0);
- }
- if (flags & (1<<3)) { // WE_HAVE_A_SCALE
- mtx[0] = mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
- mtx[1] = mtx[2] = 0;
- } else if (flags & (1<<6)) { // WE_HAVE_AN_X_AND_YSCALE
- mtx[0] = ttSHORT(comp)/16384.0f; comp+=2;
- mtx[1] = mtx[2] = 0;
- mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
- } else if (flags & (1<<7)) { // WE_HAVE_A_TWO_BY_TWO
- mtx[0] = ttSHORT(comp)/16384.0f; comp+=2;
- mtx[1] = ttSHORT(comp)/16384.0f; comp+=2;
- mtx[2] = ttSHORT(comp)/16384.0f; comp+=2;
- mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
- }
-
- // Find transformation scales.
- m = (float) STBTT_sqrt(mtx[0]*mtx[0] + mtx[1]*mtx[1]);
- n = (float) STBTT_sqrt(mtx[2]*mtx[2] + mtx[3]*mtx[3]);
-
- // Get indexed glyph.
- comp_num_verts = stbtt_GetGlyphShape(info, gidx, &comp_verts);
- if (comp_num_verts > 0) {
- // Transform vertices.
- for (i = 0; i < comp_num_verts; ++i) {
- stbtt_vertex* v = &comp_verts[i];
- stbtt_vertex_type x,y;
- x=v->x; y=v->y;
- v->x = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4]));
- v->y = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5]));
- x=v->cx; y=v->cy;
- v->cx = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4]));
- v->cy = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5]));
- }
- // Append vertices.
- tmp = (stbtt_vertex*)STBTT_malloc((num_vertices+comp_num_verts)*sizeof(stbtt_vertex), info->userdata);
- if (!tmp) {
- if (vertices) STBTT_free(vertices, info->userdata);
- if (comp_verts) STBTT_free(comp_verts, info->userdata);
- return 0;
- }
- if (num_vertices > 0) STBTT_memcpy(tmp, vertices, num_vertices*sizeof(stbtt_vertex));
- STBTT_memcpy(tmp+num_vertices, comp_verts, comp_num_verts*sizeof(stbtt_vertex));
- if (vertices) STBTT_free(vertices, info->userdata);
- vertices = tmp;
- STBTT_free(comp_verts, info->userdata);
- num_vertices += comp_num_verts;
- }
- // More components ?
- more = flags & (1<<5);
- }
- } else if (numberOfContours < 0) {
- // @TODO other compound variations?
- STBTT_assert(0);
- } else {
- // numberOfCounters == 0, do nothing
- }
-
- *pvertices = vertices;
- return num_vertices;
-}
-
-void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing)
-{
- stbtt_uint16 numOfLongHorMetrics = ttUSHORT(info->data+info->hhea + 34);
- if (glyph_index < numOfLongHorMetrics) {
- if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*glyph_index);
- if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*glyph_index + 2);
- } else {
- if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*(numOfLongHorMetrics-1));
- if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*numOfLongHorMetrics + 2*(glyph_index - numOfLongHorMetrics));
- }
-}
-
-int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2)
-{
- stbtt_uint8 *data = info->data + info->kern;
- stbtt_uint32 needle, straw;
- int l, r, m;
-
- // we only look at the first table. it must be 'horizontal' and format 0.
- if (!info->kern)
- return 0;
- if (ttUSHORT(data+2) < 1) // number of tables, need at least 1
- return 0;
- if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format
- return 0;
-
- l = 0;
- r = ttUSHORT(data+10) - 1;
- needle = glyph1 << 16 | glyph2;
- while (l <= r) {
- m = (l + r) >> 1;
- straw = ttULONG(data+18+(m*6)); // note: unaligned read
- if (needle < straw)
- r = m - 1;
- else if (needle > straw)
- l = m + 1;
- else
- return ttSHORT(data+22+(m*6));
- }
- return 0;
-}
-
-int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2)
-{
- if (!info->kern) // if no kerning table, don't waste time looking up both codepoint->glyphs
- return 0;
- return stbtt_GetGlyphKernAdvance(info, stbtt_FindGlyphIndex(info,ch1), stbtt_FindGlyphIndex(info,ch2));
-}
-
-void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing)
-{
- stbtt_GetGlyphHMetrics(info, stbtt_FindGlyphIndex(info,codepoint), advanceWidth, leftSideBearing);
-}
-
-void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap)
-{
- if (ascent ) *ascent = ttSHORT(info->data+info->hhea + 4);
- if (descent) *descent = ttSHORT(info->data+info->hhea + 6);
- if (lineGap) *lineGap = ttSHORT(info->data+info->hhea + 8);
-}
-
-void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1)
-{
- *x0 = ttSHORT(info->data + info->head + 36);
- *y0 = ttSHORT(info->data + info->head + 38);
- *x1 = ttSHORT(info->data + info->head + 40);
- *y1 = ttSHORT(info->data + info->head + 42);
-}
-
-float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float height)
-{
- int fheight = ttSHORT(info->data + info->hhea + 4) - ttSHORT(info->data + info->hhea + 6);
- return (float) height / fheight;
-}
-
-float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels)
-{
- int unitsPerEm = ttUSHORT(info->data + info->head + 18);
- return pixels / unitsPerEm;
-}
-
-void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v)
-{
- STBTT_free(v, info->userdata);
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// antialiasing software rasterizer
-//
-
-void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1)
-{
- int x0,y0,x1,y1;
- if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1))
- x0=y0=x1=y1=0; // e.g. space character
- // now move to integral bboxes (treating pixels as little squares, what pixels get touched)?
- if (ix0) *ix0 = STBTT_ifloor(x0 * scale_x + shift_x);
- if (iy0) *iy0 = -STBTT_iceil (y1 * scale_y + shift_y);
- if (ix1) *ix1 = STBTT_iceil (x1 * scale_x + shift_x);
- if (iy1) *iy1 = -STBTT_ifloor(y0 * scale_y + shift_y);
-}
-void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
-{
- stbtt_GetGlyphBitmapBoxSubpixel(font, glyph, scale_x, scale_y,0.0f,0.0f, ix0, iy0, ix1, iy1);
-}
-
-void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1)
-{
- stbtt_GetGlyphBitmapBoxSubpixel(font, stbtt_FindGlyphIndex(font,codepoint), scale_x, scale_y,shift_x,shift_y, ix0,iy0,ix1,iy1);
-}
-
-void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
-{
- stbtt_GetCodepointBitmapBoxSubpixel(font, codepoint, scale_x, scale_y,0.0f,0.0f, ix0,iy0,ix1,iy1);
-}
-
-typedef struct stbtt__edge {
- float x0,y0, x1,y1;
- int invert;
-} stbtt__edge;
-
-typedef struct stbtt__active_edge
-{
- int x,dx;
- float ey;
- struct stbtt__active_edge *next;
- int valid;
-} stbtt__active_edge;
-
-#define FIXSHIFT 10
-#define FIX (1 << FIXSHIFT)
-#define FIXMASK (FIX-1)
-
-static stbtt__active_edge *new_active(stbtt__edge *e, int off_x, float start_point, void *userdata)
-{
- stbtt__active_edge *z = (stbtt__active_edge *) STBTT_malloc(sizeof(*z), userdata); // @TODO: make a pool of these!!!
- float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
- STBTT_assert(e->y0 <= start_point);
- if (!z) return z;
- // round dx down to avoid going too far
- if (dxdy < 0)
- z->dx = -STBTT_ifloor(FIX * -dxdy);
- else
- z->dx = STBTT_ifloor(FIX * dxdy);
- z->x = STBTT_ifloor(FIX * (e->x0 + dxdy * (start_point - e->y0)));
- z->x -= off_x * FIX;
- z->ey = e->y1;
- z->next = 0;
- z->valid = e->invert ? 1 : -1;
- return z;
-}
-
-// note: this routine clips fills that extend off the edges... ideally this
-// wouldn't happen, but it could happen if the truetype glyph bounding boxes
-// are wrong, or if the user supplies a too-small bitmap
-static void stbtt__fill_active_edges(unsigned char *scanline, int len, stbtt__active_edge *e, int max_weight)
-{
- // non-zero winding fill
- int x0=0, w=0;
-
- while (e) {
- if (w == 0) {
- // if we're currently at zero, we need to record the edge start point
- x0 = e->x; w += e->valid;
- } else {
- int x1 = e->x; w += e->valid;
- // if we went to zero, we need to draw
- if (w == 0) {
- int i = x0 >> FIXSHIFT;
- int j = x1 >> FIXSHIFT;
-
- if (i < len && j >= 0) {
- if (i == j) {
- // x0,x1 are the same pixel, so compute combined coverage
- scanline[i] = scanline[i] + (stbtt_uint8) ((x1 - x0) * max_weight >> FIXSHIFT);
- } else {
- if (i >= 0) // add antialiasing for x0
- scanline[i] = scanline[i] + (stbtt_uint8) (((FIX - (x0 & FIXMASK)) * max_weight) >> FIXSHIFT);
- else
- i = -1; // clip
-
- if (j < len) // add antialiasing for x1
- scanline[j] = scanline[j] + (stbtt_uint8) (((x1 & FIXMASK) * max_weight) >> FIXSHIFT);
- else
- j = len; // clip
-
- for (++i; i < j; ++i) // fill pixels between x0 and x1
- scanline[i] = scanline[i] + (stbtt_uint8) max_weight;
- }
- }
- }
- }
-
- e = e->next;
- }
-}
-
-static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata)
-{
- stbtt__active_edge *active = NULL;
- int y,j=0;
- int max_weight = (255 / vsubsample); // weight per vertical scanline
- int s; // vertical subsample index
- unsigned char scanline_data[512], *scanline;
-
- if (result->w > 512)
- scanline = (unsigned char *) STBTT_malloc(result->w, userdata);
- else
- scanline = scanline_data;
-
- y = off_y * vsubsample;
- e[n].y0 = (off_y + result->h) * (float) vsubsample + 1;
-
- while (j < result->h) {
- STBTT_memset(scanline, 0, result->w);
- for (s=0; s < vsubsample; ++s) {
- // find center of pixel for this scanline
- float scan_y = y + 0.5f;
- stbtt__active_edge **step = &active;
-
- // update all active edges;
- // remove all active edges that terminate before the center of this scanline
- while (*step) {
- stbtt__active_edge * z = *step;
- if (z->ey <= scan_y) {
- *step = z->next; // delete from list
- STBTT_assert(z->valid);
- z->valid = 0;
- STBTT_free(z, userdata);
- } else {
- z->x += z->dx; // advance to position for current scanline
- step = &((*step)->next); // advance through list
- }
- }
-
- // resort the list if needed
- for(;;) {
- int changed=0;
- step = &active;
- while (*step && (*step)->next) {
- if ((*step)->x > (*step)->next->x) {
- stbtt__active_edge *t = *step;
- stbtt__active_edge *q = t->next;
-
- t->next = q->next;
- q->next = t;
- *step = q;
- changed = 1;
- }
- step = &(*step)->next;
- }
- if (!changed) break;
- }
-
- // insert all edges that start before the center of this scanline -- omit ones that also end on this scanline
- while (e->y0 <= scan_y) {
- if (e->y1 > scan_y) {
- stbtt__active_edge *z = new_active(e, off_x, scan_y, userdata);
- // find insertion point
- if (active == NULL)
- active = z;
- else if (z->x < active->x) {
- // insert at front
- z->next = active;
- active = z;
- } else {
- // find thing to insert AFTER
- stbtt__active_edge *p = active;
- while (p->next && p->next->x < z->x)
- p = p->next;
- // at this point, p->next->x is NOT < z->x
- z->next = p->next;
- p->next = z;
- }
- }
- ++e;
- }
-
- // now process all active edges in XOR fashion
- if (active)
- stbtt__fill_active_edges(scanline, result->w, active, max_weight);
-
- ++y;
- }
- STBTT_memcpy(result->pixels + j * result->stride, scanline, result->w);
- ++j;
- }
-
- while (active) {
- stbtt__active_edge *z = active;
- active = active->next;
- STBTT_free(z, userdata);
- }
-
- if (scanline != scanline_data)
- STBTT_free(scanline, userdata);
-}
-
-static int stbtt__edge_compare(const void *p, const void *q)
-{
- stbtt__edge *a = (stbtt__edge *) p;
- stbtt__edge *b = (stbtt__edge *) q;
-
- if (a->y0 < b->y0) return -1;
- if (a->y0 > b->y0) return 1;
- return 0;
-}
-
-typedef struct
-{
- float x,y;
-} stbtt__point;
-
-static void stbtt__rasterize(stbtt__bitmap *result, stbtt__point *pts, int *wcount, int windings, float scale_x, float scale_y, float shift_x, float shift_y, int off_x, int off_y, int invert, void *userdata)
-{
- float y_scale_inv = invert ? -scale_y : scale_y;
- stbtt__edge *e;
- int n,i,j,k,m;
- int vsubsample = result->h < 8 ? 15 : 5;
- // vsubsample should divide 255 evenly; otherwise we won't reach full opacity
-
- // now we have to blow out the windings into explicit edge lists
- n = 0;
- for (i=0; i < windings; ++i)
- n += wcount[i];
-
- e = (stbtt__edge *) STBTT_malloc(sizeof(*e) * (n+1), userdata); // add an extra one as a sentinel
- if (e == 0) return;
- n = 0;
-
- m=0;
- for (i=0; i < windings; ++i) {
- stbtt__point *p = pts + m;
- m += wcount[i];
- j = wcount[i]-1;
- for (k=0; k < wcount[i]; j=k++) {
- int a=k,b=j;
- // skip the edge if horizontal
- if (p[j].y == p[k].y)
- continue;
- // add edge from j to k to the list
- e[n].invert = 0;
- if (invert ? p[j].y > p[k].y : p[j].y < p[k].y) {
- e[n].invert = 1;
- a=j,b=k;
- }
- e[n].x0 = p[a].x * scale_x + shift_x;
- e[n].y0 = p[a].y * y_scale_inv * vsubsample + shift_y;
- e[n].x1 = p[b].x * scale_x + shift_x;
- e[n].y1 = p[b].y * y_scale_inv * vsubsample + shift_y;
- ++n;
- }
- }
-
- // now sort the edges by their highest point (should snap to integer, and then by x)
- STBTT_sort(e, n, sizeof(e[0]), stbtt__edge_compare);
-
- // now, traverse the scanlines and find the intersections on each scanline, use xor winding rule
- stbtt__rasterize_sorted_edges(result, e, n, vsubsample, off_x, off_y, userdata);
-
- STBTT_free(e, userdata);
-}
-
-static void stbtt__add_point(stbtt__point *points, int n, float x, float y)
-{
- if (!points) return; // during first pass, it's unallocated
- points[n].x = x;
- points[n].y = y;
-}
-
-// tesselate until threshhold p is happy... @TODO warped to compensate for non-linear stretching
-static int stbtt__tesselate_curve(stbtt__point *points, int *num_points, float x0, float y0, float x1, float y1, float x2, float y2, float objspace_flatness_squared, int n)
-{
- // midpoint
- float mx = (x0 + 2*x1 + x2)/4;
- float my = (y0 + 2*y1 + y2)/4;
- // versus directly drawn line
- float dx = (x0+x2)/2 - mx;
- float dy = (y0+y2)/2 - my;
- if (n > 16) // 65536 segments on one curve better be enough!
- return 1;
- if (dx*dx+dy*dy > objspace_flatness_squared) { // half-pixel error allowed... need to be smaller if AA
- stbtt__tesselate_curve(points, num_points, x0,y0, (x0+x1)/2.0f,(y0+y1)/2.0f, mx,my, objspace_flatness_squared,n+1);
- stbtt__tesselate_curve(points, num_points, mx,my, (x1+x2)/2.0f,(y1+y2)/2.0f, x2,y2, objspace_flatness_squared,n+1);
- } else {
- stbtt__add_point(points, *num_points,x2,y2);
- *num_points = *num_points+1;
- }
- return 1;
-}
-
-// returns number of contours
-stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness, int **contour_lengths, int *num_contours, void *userdata)
-{
- stbtt__point *points=0;
- int num_points=0;
-
- float objspace_flatness_squared = objspace_flatness * objspace_flatness;
- int i,n=0,start=0, pass;
-
- // count how many "moves" there are to get the contour count
- for (i=0; i < num_verts; ++i)
- if (vertices[i].type == STBTT_vmove)
- ++n;
-
- *num_contours = n;
- if (n == 0) return 0;
-
- *contour_lengths = (int *) STBTT_malloc(sizeof(**contour_lengths) * n, userdata);
-
- if (*contour_lengths == 0) {
- *num_contours = 0;
- return 0;
- }
-
- // make two passes through the points so we don't need to realloc
- for (pass=0; pass < 2; ++pass) {
- float x=0,y=0;
- if (pass == 1) {
- points = (stbtt__point *) STBTT_malloc(num_points * sizeof(points[0]), userdata);
- if (points == NULL) goto error;
- }
- num_points = 0;
- n= -1;
- for (i=0; i < num_verts; ++i) {
- switch (vertices[i].type) {
- case STBTT_vmove:
- // start the next contour
- if (n >= 0)
- (*contour_lengths)[n] = num_points - start;
- ++n;
- start = num_points;
-
- x = vertices[i].x, y = vertices[i].y;
- stbtt__add_point(points, num_points++, x,y);
- break;
- case STBTT_vline:
- x = vertices[i].x, y = vertices[i].y;
- stbtt__add_point(points, num_points++, x, y);
- break;
- case STBTT_vcurve:
- stbtt__tesselate_curve(points, &num_points, x,y,
- vertices[i].cx, vertices[i].cy,
- vertices[i].x, vertices[i].y,
- objspace_flatness_squared, 0);
- x = vertices[i].x, y = vertices[i].y;
- break;
- }
- }
- (*contour_lengths)[n] = num_points - start;
- }
-
- return points;
-error:
- STBTT_free(points, userdata);
- STBTT_free(*contour_lengths, userdata);
- *contour_lengths = 0;
- *num_contours = 0;
- return NULL;
-}
-
-void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata)
-{
- float scale = scale_x > scale_y ? scale_y : scale_x;
- int winding_count, *winding_lengths;
- stbtt__point *windings = stbtt_FlattenCurves(vertices, num_verts, flatness_in_pixels / scale, &winding_lengths, &winding_count, userdata);
- if (windings) {
- stbtt__rasterize(result, windings, winding_lengths, winding_count, scale_x, scale_y, shift_x, shift_y, x_off, y_off, invert, userdata);
- STBTT_free(winding_lengths, userdata);
- STBTT_free(windings, userdata);
- }
-}
-
-void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata)
-{
- STBTT_free(bitmap, userdata);
-}
-
-unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff)
-{
- int ix0,iy0,ix1,iy1;
- stbtt__bitmap gbm;
- stbtt_vertex *vertices;
- int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices);
-
- if (scale_x == 0) scale_x = scale_y;
- if (scale_y == 0) {
- if (scale_x == 0) return NULL;
- scale_y = scale_x;
- }
-
- stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,&ix1,&iy1);
-
- // now we get the size
- gbm.w = (ix1 - ix0);
- gbm.h = (iy1 - iy0);
- gbm.pixels = NULL; // in case we error
-
- if (width ) *width = gbm.w;
- if (height) *height = gbm.h;
- if (xoff ) *xoff = ix0;
- if (yoff ) *yoff = iy0;
-
- if (gbm.w && gbm.h) {
- gbm.pixels = (unsigned char *) STBTT_malloc(gbm.w * gbm.h, info->userdata);
- if (gbm.pixels) {
- gbm.stride = gbm.w;
-
- stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0, iy0, 1, info->userdata);
- }
- }
- STBTT_free(vertices, info->userdata);
- return gbm.pixels;
-}
-
-unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff)
-{
- return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y, 0.0f, 0.0f, glyph, width, height, xoff, yoff);
-}
-
-void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph)
-{
- int ix0,iy0;
- stbtt_vertex *vertices;
- int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices);
- stbtt__bitmap gbm;
-
- stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,0,0);
- gbm.pixels = output;
- gbm.w = out_w;
- gbm.h = out_h;
- gbm.stride = out_stride;
-
- if (gbm.w && gbm.h)
- stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0,iy0, 1, info->userdata);
-
- STBTT_free(vertices, info->userdata);
-}
-
-void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph)
-{
- stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, glyph);
-}
-
-unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff)
-{
- return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y,shift_x,shift_y, stbtt_FindGlyphIndex(info,codepoint), width,height,xoff,yoff);
-}
-
-void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint)
-{
- stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, shift_x, shift_y, stbtt_FindGlyphIndex(info,codepoint));
-}
-
-unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff)
-{
- return stbtt_GetCodepointBitmapSubpixel(info, scale_x, scale_y, 0.0f,0.0f, codepoint, width,height,xoff,yoff);
-}
-
-void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint)
-{
- stbtt_MakeCodepointBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, codepoint);
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// bitmap baking
-//
-// This is SUPER-CRAPPY packing to keep source code small
-
-extern int stbtt_BakeFontBitmap(const unsigned char *data, int offset, // font location (use offset=0 for plain .ttf)
- float pixel_height, // height of font in pixels
- unsigned char *pixels, int pw, int ph, // bitmap to be filled in
- int first_char, int num_chars, // characters to bake
- stbtt_bakedchar *chardata)
-{
- float scale;
- int x,y,bottom_y, i;
- stbtt_fontinfo f;
- stbtt_InitFont(&f, data, offset);
- STBTT_memset(pixels, 0, pw*ph); // background of 0 around pixels
- x=y=1;
- bottom_y = 1;
-
- scale = stbtt_ScaleForPixelHeight(&f, pixel_height);
-
- for (i=0; i < num_chars; ++i) {
- int advance, lsb, x0,y0,x1,y1,gw,gh;
- int g = stbtt_FindGlyphIndex(&f, first_char + i);
- stbtt_GetGlyphHMetrics(&f, g, &advance, &lsb);
- stbtt_GetGlyphBitmapBox(&f, g, scale,scale, &x0,&y0,&x1,&y1);
- gw = x1-x0;
- gh = y1-y0;
- if (x + gw + 1 >= pw)
- y = bottom_y, x = 1; // advance to next row
- if (y + gh + 1 >= ph) // check if it fits vertically AFTER potentially moving to next row
- return -i;
- STBTT_assert(x+gw < pw);
- STBTT_assert(y+gh < ph);
- stbtt_MakeGlyphBitmap(&f, pixels+x+y*pw, gw,gh,pw, scale,scale, g);
- chardata[i].x0 = (stbtt_int16) x;
- chardata[i].y0 = (stbtt_int16) y;
- chardata[i].x1 = (stbtt_int16) (x + gw);
- chardata[i].y1 = (stbtt_int16) (y + gh);
- chardata[i].xadvance = scale * advance;
- chardata[i].xoff = (float) x0;
- chardata[i].yoff = (float) y0;
- x = x + gw + 2;
- if (y+gh+2 > bottom_y)
- bottom_y = y+gh+2;
- }
- return bottom_y;
-}
-
-void stbtt_GetBakedQuad(stbtt_bakedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int opengl_fillrule)
-{
- float d3d_bias = opengl_fillrule ? 0 : -0.5f;
- float ipw = 1.0f / pw, iph = 1.0f / ph;
- stbtt_bakedchar *b = chardata + char_index;
- int round_x = STBTT_ifloor((*xpos + b->xoff) + 0.5);
- int round_y = STBTT_ifloor((*ypos + b->yoff) + 0.5);
-
- q->x0 = round_x + d3d_bias;
- q->y0 = round_y + d3d_bias;
- q->x1 = round_x + b->x1 - b->x0 + d3d_bias;
- q->y1 = round_y + b->y1 - b->y0 + d3d_bias;
-
- q->s0 = b->x0 * ipw;
- q->t0 = b->y0 * iph;
- q->s1 = b->x1 * ipw;
- q->t1 = b->y1 * iph;
-
- *xpos += b->xadvance;
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// font name matching -- recommended not to use this
-//
-
-// check if a utf8 string contains a prefix which is the utf16 string; if so return length of matching utf8 string
-static stbtt_int32 stbtt__CompareUTF8toUTF16_bigendian_prefix(const stbtt_uint8 *s1, stbtt_int32 len1, const stbtt_uint8 *s2, stbtt_int32 len2)
-{
- stbtt_int32 i=0;
-
- // convert utf16 to utf8 and compare the results while converting
- while (len2) {
- stbtt_uint16 ch = s2[0]*256 + s2[1];
- if (ch < 0x80) {
- if (i >= len1) return -1;
- if (s1[i++] != ch) return -1;
- } else if (ch < 0x800) {
- if (i+1 >= len1) return -1;
- if (s1[i++] != 0xc0 + (ch >> 6)) return -1;
- if (s1[i++] != 0x80 + (ch & 0x3f)) return -1;
- } else if (ch >= 0xd800 && ch < 0xdc00) {
- stbtt_uint32 c;
- stbtt_uint16 ch2 = s2[2]*256 + s2[3];
- if (i+3 >= len1) return -1;
- c = ((ch - 0xd800) << 10) + (ch2 - 0xdc00) + 0x10000;
- if (s1[i++] != 0xf0 + (c >> 18)) return -1;
- if (s1[i++] != 0x80 + ((c >> 12) & 0x3f)) return -1;
- if (s1[i++] != 0x80 + ((c >> 6) & 0x3f)) return -1;
- if (s1[i++] != 0x80 + ((c ) & 0x3f)) return -1;
- s2 += 2; // plus another 2 below
- len2 -= 2;
- } else if (ch >= 0xdc00 && ch < 0xe000) {
- return -1;
- } else {
- if (i+2 >= len1) return -1;
- if (s1[i++] != 0xe0 + (ch >> 12)) return -1;
- if (s1[i++] != 0x80 + ((ch >> 6) & 0x3f)) return -1;
- if (s1[i++] != 0x80 + ((ch ) & 0x3f)) return -1;
- }
- s2 += 2;
- len2 -= 2;
- }
- return i;
-}
-
-int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2)
-{
- return len1 == stbtt__CompareUTF8toUTF16_bigendian_prefix((const stbtt_uint8*) s1, len1, (const stbtt_uint8*) s2, len2);
-}
-
-// returns results in whatever encoding you request... but note that 2-byte encodings
-// will be BIG-ENDIAN... use stbtt_CompareUTF8toUTF16_bigendian() to compare
-const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID)
-{
- stbtt_int32 i,count,stringOffset;
- stbtt_uint8 *fc = font->data;
- stbtt_uint32 offset = font->fontstart;
- stbtt_uint32 nm = stbtt__find_table(fc, offset, "name");
- if (!nm) return NULL;
-
- count = ttUSHORT(fc+nm+2);
- stringOffset = nm + ttUSHORT(fc+nm+4);
- for (i=0; i < count; ++i) {
- stbtt_uint32 loc = nm + 6 + 12 * i;
- if (platformID == ttUSHORT(fc+loc+0) && encodingID == ttUSHORT(fc+loc+2)
- && languageID == ttUSHORT(fc+loc+4) && nameID == ttUSHORT(fc+loc+6)) {
- *length = ttUSHORT(fc+loc+8);
- return (const char *) (fc+stringOffset+ttUSHORT(fc+loc+10));
- }
- }
- return NULL;
-}
-
-static int stbtt__matchpair(stbtt_uint8 *fc, stbtt_uint32 nm, stbtt_uint8 *name, stbtt_int32 nlen, stbtt_int32 target_id, stbtt_int32 next_id)
-{
- stbtt_int32 i;
- stbtt_int32 count = ttUSHORT(fc+nm+2);
- stbtt_int32 stringOffset = nm + ttUSHORT(fc+nm+4);
-
- for (i=0; i < count; ++i) {
- stbtt_uint32 loc = nm + 6 + 12 * i;
- stbtt_int32 id = ttUSHORT(fc+loc+6);
- if (id == target_id) {
- // find the encoding
- stbtt_int32 platform = ttUSHORT(fc+loc+0), encoding = ttUSHORT(fc+loc+2), language = ttUSHORT(fc+loc+4);
-
- // is this a Unicode encoding?
- if (platform == 0 || (platform == 3 && encoding == 1) || (platform == 3 && encoding == 10)) {
- stbtt_int32 slen = ttUSHORT(fc+loc+8);
- stbtt_int32 off = ttUSHORT(fc+loc+10);
-
- // check if there's a prefix match
- stbtt_int32 matchlen = stbtt__CompareUTF8toUTF16_bigendian_prefix(name, nlen, fc+stringOffset+off,slen);
- if (matchlen >= 0) {
- // check for target_id+1 immediately following, with same encoding & language
- if (i+1 < count && ttUSHORT(fc+loc+12+6) == next_id && ttUSHORT(fc+loc+12) == platform && ttUSHORT(fc+loc+12+2) == encoding && ttUSHORT(fc+loc+12+4) == language) {
- slen = ttUSHORT(fc+loc+12+8);
- off = ttUSHORT(fc+loc+12+10);
- if (slen == 0) {
- if (matchlen == nlen)
- return 1;
- } else if (matchlen < nlen && name[matchlen] == ' ') {
- ++matchlen;
- if (stbtt_CompareUTF8toUTF16_bigendian((char*) (name+matchlen), nlen-matchlen, (char*)(fc+stringOffset+off),slen))
- return 1;
- }
- } else {
- // if nothing immediately following
- if (matchlen == nlen)
- return 1;
- }
- }
- }
-
- // @TODO handle other encodings
- }
- }
- return 0;
-}
-
-static int stbtt__matches(stbtt_uint8 *fc, stbtt_uint32 offset, stbtt_uint8 *name, stbtt_int32 flags)
-{
- stbtt_int32 nlen = (stbtt_int32) STBTT_strlen((char *) name);
- stbtt_uint32 nm,hd;
- if (!stbtt__isfont(fc+offset)) return 0;
-
- // check italics/bold/underline flags in macStyle...
- if (flags) {
- hd = stbtt__find_table(fc, offset, "head");
- if ((ttUSHORT(fc+hd+44) & 7) != (flags & 7)) return 0;
- }
-
- nm = stbtt__find_table(fc, offset, "name");
- if (!nm) return 0;
-
- if (flags) {
- // if we checked the macStyle flags, then just check the family and ignore the subfamily
- if (stbtt__matchpair(fc, nm, name, nlen, 16, -1)) return 1;
- if (stbtt__matchpair(fc, nm, name, nlen, 1, -1)) return 1;
- if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1;
- } else {
- if (stbtt__matchpair(fc, nm, name, nlen, 16, 17)) return 1;
- if (stbtt__matchpair(fc, nm, name, nlen, 1, 2)) return 1;
- if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1;
- }
-
- return 0;
-}
-
-int stbtt_FindMatchingFont(const unsigned char *font_collection, const char *name_utf8, stbtt_int32 flags)
-{
- stbtt_int32 i;
- for (i=0;;++i) {
- stbtt_int32 off = stbtt_GetFontOffsetForIndex(font_collection, i);
- if (off < 0) return off;
- if (stbtt__matches((stbtt_uint8 *) font_collection, off, (stbtt_uint8*) name_utf8, flags))
- return off;
- }
-}
-
-#endif // STB_TRUETYPE_IMPLEMENTATION
