Quake-III-Arena

shaders.c (14989B)

---

 /*
 ===========================================================================
 Copyright (C) 1999-2005 Id Software, Inc.
 
 This file is part of Quake III Arena source code.
 
 Quake III Arena source code is free software; you can redistribute it
 and/or modify it under the terms of the GNU General Public License as
 published by the Free Software Foundation; either version 2 of the License,
 or (at your option) any later version.
 
 Quake III Arena source code is distributed in the hope that it will be
 useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with Foobar; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 ===========================================================================
 */
 
 #include <string.h>
 #include <math.h>
 #include "cmdlib.h"
 #include "mathlib.h"
 #include "imagelib.h"
 #include "scriplib.h"
 
 #ifdef _TTIMOBUILD
 #include "../common/qfiles.h"
 #include "../common/surfaceflags.h"
 #else
 #include "../code/qcommon/qfiles.h"
 #include "../code/game/surfaceflags.h"
 #endif
 
 #include "shaders.h"
 #ifdef _WIN32
 
 #ifdef _TTIMOBUILD
 #include "pakstuff.h"
 #include "jpeglib.h"
 #else
 #include "../libs/pakstuff.h"
 #include "../libs/jpeglib.h"
 #endif
 
 #endif
 
 
 // 5% backsplash by default
 #define	DEFAULT_BACKSPLASH_FRACTION		0.05
 #define	DEFAULT_BACKSPLASH_DISTANCE		24
 
 
 #define	MAX_SURFACE_INFO	4096
 
 shaderInfo_t	defaultInfo;
 shaderInfo_t	shaderInfo[MAX_SURFACE_INFO];
 int				numShaderInfo;
 
 
 typedef struct {
 	char	*name;
 	int		clearSolid, surfaceFlags, contents;
 } infoParm_t;
 
 infoParm_t	infoParms[] = {
 	// server relevant contents
 	{"water",		1,	0,	CONTENTS_WATER },
 	{"slime",		1,	0,	CONTENTS_SLIME },		// mildly damaging
 	{"lava",		1,	0,	CONTENTS_LAVA },		// very damaging
 	{"playerclip",	1,	0,	CONTENTS_PLAYERCLIP },
 	{"monsterclip",	1,	0,	CONTENTS_MONSTERCLIP },
 	{"nodrop",		1,	0,	CONTENTS_NODROP },		// don't drop items or leave bodies (death fog, lava, etc)
 	{"nonsolid",	1,	SURF_NONSOLID,	0},						// clears the solid flag
 
 	// utility relevant attributes
 	{"origin",		1,	0,	CONTENTS_ORIGIN },		// center of rotating brushes
 	{"trans",		0,	0,	CONTENTS_TRANSLUCENT },	// don't eat contained surfaces
 	{"detail",		0,	0,	CONTENTS_DETAIL },		// don't include in structural bsp
 	{"structural",	0,	0,	CONTENTS_STRUCTURAL },	// force into structural bsp even if trnas
 	{"areaportal",	1,	0,	CONTENTS_AREAPORTAL },	// divides areas
 	{"clusterportal",1, 0,  CONTENTS_CLUSTERPORTAL },// for bots
 	{"donotenter",  1,  0,  CONTENTS_DONOTENTER },	// for bots
 	{"botclip",     1,  0,  CONTENTS_BOTCLIP },		// for bots
 	{"nobotclip",	0,	0,	CONTENTS_NOBOTCLIP },	// don't use for bot clipping
 
 	{"fog",			1,	0,	CONTENTS_FOG},			// carves surfaces entering
 	{"sky",			0,	SURF_SKY,		0 },		// emit light from an environment map
 	{"lightfilter",	0,	SURF_LIGHTFILTER, 0 },		// filter light going through it
 	{"alphashadow",	0,	SURF_ALPHASHADOW, 0 },		// test light on a per-pixel basis
 	{"hint",		0,	SURF_HINT,		0 },		// use as a primary splitter
 
 	// server attributes
 	{"slick",		0,	SURF_SLICK,		0 },
 	{"noimpact",	0,	SURF_NOIMPACT,	0 },		// don't make impact explosions or marks
 	{"nomarks",		0,	SURF_NOMARKS,	0 },		// don't make impact marks, but still explode
 	{"ladder",		0,	SURF_LADDER,	0 },
 	{"nodamage",	0,	SURF_NODAMAGE,	0 },
 	{"metalsteps",	0,	SURF_METALSTEPS,0 },
 	{"flesh",		0,	SURF_FLESH,		0 },
 	{"nosteps",		0,	SURF_NOSTEPS,	0 },
 
 	// drawsurf attributes
 	{"nodraw",		0,	SURF_NODRAW,	0 },		// don't generate a drawsurface (or a lightmap)
 	{"pointlight",	0,	SURF_POINTLIGHT, 0 },		// sample lighting at vertexes
 	{"nolightmap",	0,	SURF_NOLIGHTMAP,0 },		// don't generate a lightmap
 	{"nodlight",	0,	SURF_NODLIGHT, 0 },			// don't ever add dynamic lights
 	{"dust",		0,	SURF_DUST, 0}				// leave dust trail when walking on this surface
 };
 
 
 /*
 ===============
 LoadShaderImage
 ===============
 */
 
 byte* LoadImageFile(char *filename, qboolean *bTGA)
 {
   byte *buffer = NULL;
   int nLen = 0;
   *bTGA = qtrue;
   if (FileExists(filename))
   {
     LoadFileBlock(filename, &buffer);
   }
 #ifdef _WIN32
   else
   {
     PakLoadAnyFile(filename, &buffer);
   }
 #endif
   if ( buffer == NULL)
   {
     nLen = strlen(filename);
     filename[nLen-3] = 'j';
     filename[nLen-2] = 'p';
     filename[nLen-1] = 'g';
     if (FileExists(filename))
     {
       LoadFileBlock(filename, &buffer);
     }
 #ifdef _WIN32
     else
     {
       PakLoadAnyFile(filename, &buffer);
     }
 #endif
     if ( buffer )
     {
       *bTGA = qfalse;
     }
   }
   return buffer;
 }
 
 /*
 ===============
 LoadShaderImage
 ===============
 */
 static void LoadShaderImage( shaderInfo_t *si ) {
 	char			filename[1024];
 	int				i, count;
 	float			color[4];
   byte      *buffer;
   qboolean  bTGA = qtrue;
 
 	// look for the lightimage if it is specified
 	if ( si->lightimage[0] ) {
 		sprintf( filename, "%s%s", gamedir, si->lightimage );
 		DefaultExtension( filename, ".tga" );
     buffer = LoadImageFile(filename, &bTGA);
     if ( buffer != NULL) {
       goto loadTga;
     }
   }
 
 	// look for the editorimage if it is specified
 	if ( si->editorimage[0] ) {
 		sprintf( filename, "%s%s", gamedir, si->editorimage );
 		DefaultExtension( filename, ".tga" );
     buffer = LoadImageFile(filename, &bTGA);
     if ( buffer != NULL) {
       goto loadTga;
     }
   }
 
   // just try the shader name with a .tga
 	// on unix, we have case sensitivity problems...
   sprintf( filename, "%s%s.tga", gamedir, si->shader );
   buffer = LoadImageFile(filename, &bTGA);
   if ( buffer != NULL) {
 		goto loadTga;
 	}
 
   sprintf( filename, "%s%s.TGA", gamedir, si->shader );
   buffer = LoadImageFile(filename, &bTGA);
   if ( buffer != NULL) {
 		goto loadTga;
 	}
 
 	// couldn't load anything
 	_printf("WARNING: Couldn't find image for shader %s\n", si->shader );
 
 	si->color[0] = 1;
 	si->color[1] = 1;
 	si->color[2] = 1;
 	si->width = 64;
 	si->height = 64;
 	si->pixels = malloc( si->width * si->height * 4 );
 	memset ( si->pixels, 255, si->width * si->height * 4 );
 	return;
 
 	// load the image to get dimensions and color
 loadTga:
   if ( bTGA) {
 	  LoadTGABuffer( buffer, &si->pixels, &si->width, &si->height );
   }
   else {
 #ifdef _WIN32
     LoadJPGBuff(buffer, &si->pixels, &si->width, &si->height );
 #endif
   }
 
   free(buffer);
 
 	count = si->width * si->height;
 
 	VectorClear( color );
 	color[ 3 ] = 0;
 	for ( i = 0 ; i < count ; i++ ) {
 		color[0] += si->pixels[ i * 4 + 0 ];
 		color[1] += si->pixels[ i * 4 + 1 ];
 		color[2] += si->pixels[ i * 4 + 2 ];
 		color[3] += si->pixels[ i * 4 + 3 ];
 	}
 	ColorNormalize( color, si->color );
 	VectorScale( color, 1.0/count, si->averageColor );
 }
 
 /*
 ===============
 AllocShaderInfo
 ===============
 */
 static shaderInfo_t	*AllocShaderInfo( void ) {
 	shaderInfo_t	*si;
 
 	if ( numShaderInfo == MAX_SURFACE_INFO ) {
 		Error( "MAX_SURFACE_INFO" );
 	}
 	si = &shaderInfo[ numShaderInfo ];
 	numShaderInfo++;
 
 	// set defaults
 
 	si->contents = CONTENTS_SOLID;
 
 	si->backsplashFraction = DEFAULT_BACKSPLASH_FRACTION;
 	si->backsplashDistance = DEFAULT_BACKSPLASH_DISTANCE;
 
 	si->lightmapSampleSize = 0;
 	si->forceTraceLight = qfalse;
 	si->forceVLight = qfalse;
 	si->patchShadows = qfalse;
 	si->vertexShadows = qfalse;
 	si->noVertexShadows = qfalse;
 	si->forceSunLight = qfalse;
 	si->vertexScale = 1.0;
 	si->notjunc = qfalse;
 
 	return si;
 }
 
 /*
 ===============
 ShaderInfoForShader
 ===============
 */
 shaderInfo_t	*ShaderInfoForShader( const char *shaderName ) {
 	int				i;
 	shaderInfo_t	*si;
 	char			shader[MAX_QPATH];
 
 	// strip off extension
 	strcpy( shader, shaderName );
 	StripExtension( shader );
 
 	// search for it
 	for ( i = 0 ; i < numShaderInfo ; i++ ) {
 		si = &shaderInfo[ i ];
 		if ( !Q_stricmp( shader, si->shader ) ) {
 			if ( !si->width ) {
 				LoadShaderImage( si );
 			}
 			return si;
 		}
 	}
 
 	si = AllocShaderInfo();
 	strcpy( si->shader, shader );
 
 	LoadShaderImage( si );
 
 	return si;
 }
 
 /*
 ===============
 ParseShaderFile
 ===============
 */
 static void ParseShaderFile( const char *filename ) {
 	int		i;
 	int		numInfoParms = sizeof(infoParms) / sizeof(infoParms[0]);
 	shaderInfo_t	*si;
 
 //	qprintf( "shaderFile: %s\n", filename );
 	LoadScriptFile( filename );
 	while ( 1 ) {
 		if ( !GetToken( qtrue ) ) {
 			break;
 		}
 
 		si = AllocShaderInfo();
 		strcpy( si->shader, token );
 		MatchToken( "{" );
 		while ( 1 ) {
 			if ( !GetToken( qtrue ) ) {
 				break;
 			}
 			if ( !strcmp( token, "}" ) ) {
 				break;
 			}
 
 			// skip internal braced sections
 			if ( !strcmp( token, "{" ) ) {
 				si->hasPasses = qtrue;
 				while ( 1 ) {
 					if ( !GetToken( qtrue ) ) {
 						break;
 					}
 					if ( !strcmp( token, "}" ) ) {
 						break;
 					}
 				}
 				continue;
 			}
 
 			if ( !Q_stricmp( token, "surfaceparm" ) ) {
 				GetToken( qfalse );
 				for ( i = 0 ; i < numInfoParms ; i++ ) {
 					if ( !Q_stricmp( token, infoParms[i].name ) ) {
 						si->surfaceFlags |= infoParms[i].surfaceFlags;
 						si->contents |= infoParms[i].contents;
 						if ( infoParms[i].clearSolid ) {
 							si->contents &= ~CONTENTS_SOLID;
 						}
 						break;
 					}
 				}
 				if ( i == numInfoParms ) {
 					// we will silently ignore all tokens beginning with qer,
 					// which are QuakeEdRadient parameters
 					if ( Q_strncasecmp( token, "qer", 3 ) ) {
 						_printf( "Unknown surfaceparm: \"%s\"\n", token );
 					}
 				}
 				continue;
 			}
 
 
 			// qer_editorimage <image>
 			if ( !Q_stricmp( token, "qer_editorimage" ) ) {
 				GetToken( qfalse );
 				strcpy( si->editorimage, token );
 				DefaultExtension( si->editorimage, ".tga" );
 				continue;
 			}
 
 			// q3map_lightimage <image>
 			if ( !Q_stricmp( token, "q3map_lightimage" ) ) {
 				GetToken( qfalse );
 				strcpy( si->lightimage, token );
 				DefaultExtension( si->lightimage, ".tga" );
 				continue;
 			}
 
 			// q3map_surfacelight <value>
 			if ( !Q_stricmp( token, "q3map_surfacelight" )  ) {
 				GetToken( qfalse );
 				si->value = atoi( token );
 				continue;
 			}
 
 			// q3map_lightsubdivide <value>
 			if ( !Q_stricmp( token, "q3map_lightsubdivide" )  ) {
 				GetToken( qfalse );
 				si->lightSubdivide = atoi( token );
 				continue;
 			}
 
 			// q3map_lightmapsamplesize <value>
 			if ( !Q_stricmp( token, "q3map_lightmapsamplesize" ) ) {
 				GetToken( qfalse );
 				si->lightmapSampleSize = atoi( token );
 				continue;
 			}
 
 			// q3map_tracelight
 			if ( !Q_stricmp( token, "q3map_tracelight" ) ) {
 				si->forceTraceLight = qtrue;
 				continue;
 			}
 
 			// q3map_vlight
 			if ( !Q_stricmp( token, "q3map_vlight" ) ) {
 				si->forceVLight = qtrue;
 				continue;
 			}
 
 			// q3map_patchshadows
 			if ( !Q_stricmp( token, "q3map_patchshadows" ) ) {
 				si->patchShadows = qtrue;
 				continue;
 			}
 
 			// q3map_vertexshadows
 			if ( !Q_stricmp( token, "q3map_vertexshadows" ) ) {
 				si->vertexShadows = qtrue;
 				continue;
 			}
 
 			// q3map_novertexshadows
 			if ( !Q_stricmp( token, "q3map_novertexshadows" ) ) {
 				si->noVertexShadows = qtrue;
 				continue;
 			}
 
 			// q3map_forcesunlight
 			if ( !Q_stricmp( token, "q3map_forcesunlight" ) ) {
 				si->forceSunLight = qtrue;
 				continue;
 			}
 
 			// q3map_vertexscale
 			if ( !Q_stricmp( token, "q3map_vertexscale" ) ) {
 				GetToken( qfalse );
 				si->vertexScale = atof(token);
 				continue;
 			}
 
 			// q3map_notjunc
 			if ( !Q_stricmp( token, "q3map_notjunc" ) ) {
 				si->notjunc = qtrue;
 				continue;
 			}
 
 			// q3map_globaltexture
 			if ( !Q_stricmp( token, "q3map_globaltexture" )  ) {
 				si->globalTexture = qtrue;
 				continue;
 			}
 
 			// q3map_backsplash <percent> <distance>
 			if ( !Q_stricmp( token, "q3map_backsplash" ) ) {
 				GetToken( qfalse );
 				si->backsplashFraction = atof( token ) * 0.01;
 				GetToken( qfalse );
 				si->backsplashDistance = atof( token );
 				continue;
 			}
 
 			// q3map_backshader <shader>
 			if ( !Q_stricmp( token, "q3map_backshader" ) ) {
 				GetToken( qfalse );
 				strcpy( si->backShader, token );
 				continue;
 			}
 
 			// q3map_flare <shader>
 			if ( !Q_stricmp( token, "q3map_flare" ) ) {
 				GetToken( qfalse );
 				strcpy( si->flareShader, token );
 				continue;
 			}
 
 			// light <value> 
 			// old style flare specification
 			if ( !Q_stricmp( token, "light" ) ) {
 				GetToken( qfalse );
 				strcpy( si->flareShader, "flareshader" );
 				continue;
 			}
 
 			// q3map_sun <red> <green> <blue> <intensity> <degrees> <elivation>
 			// color will be normalized, so it doesn't matter what range you use
 			// intensity falls off with angle but not distance 100 is a fairly bright sun
 			// degree of 0 = from the east, 90 = north, etc.  altitude of 0 = sunrise/set, 90 = noon
 			if ( !Q_stricmp( token, "q3map_sun" ) ) {
 				float	a, b;
 
 				GetToken( qfalse );
 				si->sunLight[0] = atof( token );
 				GetToken( qfalse );
 				si->sunLight[1] = atof( token );
 				GetToken( qfalse );
 				si->sunLight[2] = atof( token );
 				
 				VectorNormalize( si->sunLight, si->sunLight);
 
 				GetToken( qfalse );
 				a = atof( token );
 				VectorScale( si->sunLight, a, si->sunLight);
 
 				GetToken( qfalse );
 				a = atof( token );
 				a = a / 180 * Q_PI;
 
 				GetToken( qfalse );
 				b = atof( token );
 				b = b / 180 * Q_PI;
 
 				si->sunDirection[0] = cos( a ) * cos( b );
 				si->sunDirection[1] = sin( a ) * cos( b );
 				si->sunDirection[2] = sin( b );
 
 				si->surfaceFlags |= SURF_SKY;
 				continue;
 			}
 
 			// tesssize is used to force liquid surfaces to subdivide
 			if ( !Q_stricmp( token, "tesssize" ) ) {
 				GetToken( qfalse );
 				si->subdivisions = atof( token );
 				continue;
 			}
 
 			// cull none will set twoSided
 			if ( !Q_stricmp( token, "cull" ) ) {
 				GetToken( qfalse );
 				if ( !Q_stricmp( token, "none" ) ) {
 					si->twoSided = qtrue;
 				}
 				continue;
 			}
 
 
 			// deformVertexes autosprite[2]
 			// we catch this so autosprited surfaces become point
 			// lights instead of area lights
 			if ( !Q_stricmp( token, "deformVertexes" ) ) {
 				GetToken( qfalse );
 				if ( !Q_strncasecmp( token, "autosprite", 10 ) ) {
 					si->autosprite = qtrue;
           si->contents = CONTENTS_DETAIL;
 				}
 				continue;
 			}
 
 
 			// ignore all other tokens on the line
 
 			while ( TokenAvailable() ) {
 				GetToken( qfalse );
 			}
 		}			
 	}
 }
 
 /*
 ===============
 LoadShaderInfo
 ===============
 */
 #define	MAX_SHADER_FILES	64
 void LoadShaderInfo( void ) {
 	char			filename[1024];
 	int				i;
 	char			*shaderFiles[MAX_SHADER_FILES];
 	int				numShaderFiles;
 
 	sprintf( filename, "%sscripts/shaderlist.txt", gamedir );
 	LoadScriptFile( filename );
 
 	numShaderFiles = 0;
 	while ( 1 ) {
 		if ( !GetToken( qtrue ) ) {
 			break;
 		}
     shaderFiles[numShaderFiles] = malloc(MAX_OS_PATH);
 		strcpy( shaderFiles[ numShaderFiles ], token );
 		numShaderFiles++;
 	}
 
 	for ( i = 0 ; i < numShaderFiles ; i++ ) {
 		sprintf( filename, "%sscripts/%s.shader", gamedir, shaderFiles[i] );
 		ParseShaderFile( filename );
     free(shaderFiles[i]);
 	}
 
 	qprintf( "%5i shaderInfo\n", numShaderInfo);
 }