Quake-III-Arena

win_glimp.c (39965B)

---

 /*
 ===========================================================================
 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
 ===========================================================================
 */
 /*
 ** WIN_GLIMP.C
 **
 ** This file contains ALL Win32 specific stuff having to do with the
 ** OpenGL refresh.  When a port is being made the following functions
 ** must be implemented by the port:
 **
 ** GLimp_EndFrame
 ** GLimp_Init
 ** GLimp_LogComment
 ** GLimp_Shutdown
 **
 ** Note that the GLW_xxx functions are Windows specific GL-subsystem
 ** related functions that are relevant ONLY to win_glimp.c
 */
 #include <assert.h>
 #include "../renderer/tr_local.h"
 #include "../qcommon/qcommon.h"
 #include "resource.h"
 #include "glw_win.h"
 #include "win_local.h"
 
 extern void WG_CheckHardwareGamma( void );
 extern void WG_RestoreGamma( void );
 
 typedef enum {
 	RSERR_OK,
 
 	RSERR_INVALID_FULLSCREEN,
 	RSERR_INVALID_MODE,
 
 	RSERR_UNKNOWN
 } rserr_t;
 
 #define TRY_PFD_SUCCESS		0
 #define TRY_PFD_FAIL_SOFT	1
 #define TRY_PFD_FAIL_HARD	2
 
 #define	WINDOW_CLASS_NAME	"Quake 3: Arena"
 
 static void		GLW_InitExtensions( void );
 static rserr_t	GLW_SetMode( const char *drivername, 
 							 int mode, 
 							 int colorbits, 
 							 qboolean cdsFullscreen );
 
 static qboolean s_classRegistered = qfalse;
 
 //
 // function declaration
 //
 void	 QGL_EnableLogging( qboolean enable );
 qboolean QGL_Init( const char *dllname );
 void     QGL_Shutdown( void );
 
 //
 // variable declarations
 //
 glwstate_t glw_state;
 
 cvar_t	*r_allowSoftwareGL;		// don't abort out if the pixelformat claims software
 cvar_t	*r_maskMinidriver;		// allow a different dll name to be treated as if it were opengl32.dll
 
 
 
 /*
 ** GLW_StartDriverAndSetMode
 */
 static qboolean GLW_StartDriverAndSetMode( const char *drivername, 
 										   int mode, 
 										   int colorbits,
 										   qboolean cdsFullscreen )
 {
 	rserr_t err;
 
 	err = GLW_SetMode( drivername, r_mode->integer, colorbits, cdsFullscreen );
 
 	switch ( err )
 	{
 	case RSERR_INVALID_FULLSCREEN:
 		ri.Printf( PRINT_ALL, "...WARNING: fullscreen unavailable in this mode\n" );
 		return qfalse;
 	case RSERR_INVALID_MODE:
 		ri.Printf( PRINT_ALL, "...WARNING: could not set the given mode (%d)\n", mode );
 		return qfalse;
 	default:
 		break;
 	}
 	return qtrue;
 }
 
 /*
 ** ChoosePFD
 **
 ** Helper function that replaces ChoosePixelFormat.
 */
 #define MAX_PFDS 256
 
 static int GLW_ChoosePFD( HDC hDC, PIXELFORMATDESCRIPTOR *pPFD )
 {
 	PIXELFORMATDESCRIPTOR pfds[MAX_PFDS+1];
 	int maxPFD = 0;
 	int i;
 	int bestMatch = 0;
 
 	ri.Printf( PRINT_ALL, "...GLW_ChoosePFD( %d, %d, %d )\n", ( int ) pPFD->cColorBits, ( int ) pPFD->cDepthBits, ( int ) pPFD->cStencilBits );
 
 	// count number of PFDs
 	if ( glConfig.driverType > GLDRV_ICD )
 	{
 		maxPFD = qwglDescribePixelFormat( hDC, 1, sizeof( PIXELFORMATDESCRIPTOR ), &pfds[0] );
 	}
 	else
 	{
 		maxPFD = DescribePixelFormat( hDC, 1, sizeof( PIXELFORMATDESCRIPTOR ), &pfds[0] );
 	}
 	if ( maxPFD > MAX_PFDS )
 	{
 		ri.Printf( PRINT_WARNING, "...numPFDs > MAX_PFDS (%d > %d)\n", maxPFD, MAX_PFDS );
 		maxPFD = MAX_PFDS;
 	}
 
 	ri.Printf( PRINT_ALL, "...%d PFDs found\n", maxPFD - 1 );
 
 	// grab information
 	for ( i = 1; i <= maxPFD; i++ )
 	{
 		if ( glConfig.driverType > GLDRV_ICD )
 		{
 			qwglDescribePixelFormat( hDC, i, sizeof( PIXELFORMATDESCRIPTOR ), &pfds[i] );
 		}
 		else
 		{
 			DescribePixelFormat( hDC, i, sizeof( PIXELFORMATDESCRIPTOR ), &pfds[i] );
 		}
 	}
 
 	// look for a best match
 	for ( i = 1; i <= maxPFD; i++ )
 	{
 		//
 		// make sure this has hardware acceleration
 		//
 		if ( ( pfds[i].dwFlags & PFD_GENERIC_FORMAT ) != 0 ) 
 		{
 			if ( !r_allowSoftwareGL->integer )
 			{
 				if ( r_verbose->integer )
 				{
 					ri.Printf( PRINT_ALL, "...PFD %d rejected, software acceleration\n", i );
 				}
 				continue;
 			}
 		}
 
 		// verify pixel type
 		if ( pfds[i].iPixelType != PFD_TYPE_RGBA )
 		{
 			if ( r_verbose->integer )
 			{
 				ri.Printf( PRINT_ALL, "...PFD %d rejected, not RGBA\n", i );
 			}
 			continue;
 		}
 
 		// verify proper flags
 		if ( ( ( pfds[i].dwFlags & pPFD->dwFlags ) & pPFD->dwFlags ) != pPFD->dwFlags ) 
 		{
 			if ( r_verbose->integer )
 			{
 				ri.Printf( PRINT_ALL, "...PFD %d rejected, improper flags (%x instead of %x)\n", i, pfds[i].dwFlags, pPFD->dwFlags );
 			}
 			continue;
 		}
 
 		// verify enough bits
 		if ( pfds[i].cDepthBits < 15 )
 		{
 			continue;
 		}
 		if ( ( pfds[i].cStencilBits < 4 ) && ( pPFD->cStencilBits > 0 ) )
 		{
 			continue;
 		}
 
 		//
 		// selection criteria (in order of priority):
 		// 
 		//  PFD_STEREO
 		//  colorBits
 		//  depthBits
 		//  stencilBits
 		//
 		if ( bestMatch )
 		{
 			// check stereo
 			if ( ( pfds[i].dwFlags & PFD_STEREO ) && ( !( pfds[bestMatch].dwFlags & PFD_STEREO ) ) && ( pPFD->dwFlags & PFD_STEREO ) )
 			{
 				bestMatch = i;
 				continue;
 			}
 			
 			if ( !( pfds[i].dwFlags & PFD_STEREO ) && ( pfds[bestMatch].dwFlags & PFD_STEREO ) && ( pPFD->dwFlags & PFD_STEREO ) )
 			{
 				bestMatch = i;
 				continue;
 			}
 
 			// check color
 			if ( pfds[bestMatch].cColorBits != pPFD->cColorBits )
 			{
 				// prefer perfect match
 				if ( pfds[i].cColorBits == pPFD->cColorBits )
 				{
 					bestMatch = i;
 					continue;
 				}
 				// otherwise if this PFD has more bits than our best, use it
 				else if ( pfds[i].cColorBits > pfds[bestMatch].cColorBits )
 				{
 					bestMatch = i;
 					continue;
 				}
 			}
 
 			// check depth
 			if ( pfds[bestMatch].cDepthBits != pPFD->cDepthBits )
 			{
 				// prefer perfect match
 				if ( pfds[i].cDepthBits == pPFD->cDepthBits )
 				{
 					bestMatch = i;
 					continue;
 				}
 				// otherwise if this PFD has more bits than our best, use it
 				else if ( pfds[i].cDepthBits > pfds[bestMatch].cDepthBits )
 				{
 					bestMatch = i;
 					continue;
 				}
 			}
 
 			// check stencil
 			if ( pfds[bestMatch].cStencilBits != pPFD->cStencilBits )
 			{
 				// prefer perfect match
 				if ( pfds[i].cStencilBits == pPFD->cStencilBits )
 				{
 					bestMatch = i;
 					continue;
 				}
 				// otherwise if this PFD has more bits than our best, use it
 				else if ( ( pfds[i].cStencilBits > pfds[bestMatch].cStencilBits ) && 
 					 ( pPFD->cStencilBits > 0 ) )
 				{
 					bestMatch = i;
 					continue;
 				}
 			}
 		}
 		else
 		{
 			bestMatch = i;
 		}
 	}
 	
 	if ( !bestMatch )
 		return 0;
 
 	if ( ( pfds[bestMatch].dwFlags & PFD_GENERIC_FORMAT ) != 0 )
 	{
 		if ( !r_allowSoftwareGL->integer )
 		{
 			ri.Printf( PRINT_ALL, "...no hardware acceleration found\n" );
 			return 0;
 		}
 		else
 		{
 			ri.Printf( PRINT_ALL, "...using software emulation\n" );
 		}
 	}
 	else if ( pfds[bestMatch].dwFlags & PFD_GENERIC_ACCELERATED )
 	{
 		ri.Printf( PRINT_ALL, "...MCD acceleration found\n" );
 	}
 	else
 	{
 		ri.Printf( PRINT_ALL, "...hardware acceleration found\n" );
 	}
 
 	*pPFD = pfds[bestMatch];
 
 	return bestMatch;
 }
 
 /*
 ** void GLW_CreatePFD
 **
 ** Helper function zeros out then fills in a PFD
 */
 static void GLW_CreatePFD( PIXELFORMATDESCRIPTOR *pPFD, int colorbits, int depthbits, int stencilbits, qboolean stereo )
 {
     PIXELFORMATDESCRIPTOR src = 
 	{
 		sizeof(PIXELFORMATDESCRIPTOR),	// size of this pfd
 		1,								// version number
 		PFD_DRAW_TO_WINDOW |			// support window
 		PFD_SUPPORT_OPENGL |			// support OpenGL
 		PFD_DOUBLEBUFFER,				// double buffered
 		PFD_TYPE_RGBA,					// RGBA type
 		24,								// 24-bit color depth
 		0, 0, 0, 0, 0, 0,				// color bits ignored
 		0,								// no alpha buffer
 		0,								// shift bit ignored
 		0,								// no accumulation buffer
 		0, 0, 0, 0, 					// accum bits ignored
 		24,								// 24-bit z-buffer	
 		8,								// 8-bit stencil buffer
 		0,								// no auxiliary buffer
 		PFD_MAIN_PLANE,					// main layer
 		0,								// reserved
 		0, 0, 0							// layer masks ignored
     };
 
 	src.cColorBits = colorbits;
 	src.cDepthBits = depthbits;
 	src.cStencilBits = stencilbits;
 
 	if ( stereo )
 	{
 		ri.Printf( PRINT_ALL, "...attempting to use stereo\n" );
 		src.dwFlags |= PFD_STEREO;
 		glConfig.stereoEnabled = qtrue;
 	}
 	else
 	{
 		glConfig.stereoEnabled = qfalse;
 	}
 
 	*pPFD = src;
 }
 
 /*
 ** GLW_MakeContext
 */
 static int GLW_MakeContext( PIXELFORMATDESCRIPTOR *pPFD )
 {
 	int pixelformat;
 
 	//
 	// don't putz around with pixelformat if it's already set (e.g. this is a soft
 	// reset of the graphics system)
 	//
 	if ( !glw_state.pixelFormatSet )
 	{
 		//
 		// choose, set, and describe our desired pixel format.  If we're
 		// using a minidriver then we need to bypass the GDI functions,
 		// otherwise use the GDI functions.
 		//
 		if ( ( pixelformat = GLW_ChoosePFD( glw_state.hDC, pPFD ) ) == 0 )
 		{
 			ri.Printf( PRINT_ALL, "...GLW_ChoosePFD failed\n");
 			return TRY_PFD_FAIL_SOFT;
 		}
 		ri.Printf( PRINT_ALL, "...PIXELFORMAT %d selected\n", pixelformat );
 
 		if ( glConfig.driverType > GLDRV_ICD )
 		{
 			qwglDescribePixelFormat( glw_state.hDC, pixelformat, sizeof( *pPFD ), pPFD );
 			if ( qwglSetPixelFormat( glw_state.hDC, pixelformat, pPFD ) == FALSE )
 			{
 				ri.Printf ( PRINT_ALL, "...qwglSetPixelFormat failed\n");
 				return TRY_PFD_FAIL_SOFT;
 			}
 		}
 		else
 		{
 			DescribePixelFormat( glw_state.hDC, pixelformat, sizeof( *pPFD ), pPFD );
 
 			if ( SetPixelFormat( glw_state.hDC, pixelformat, pPFD ) == FALSE )
 			{
 				ri.Printf (PRINT_ALL, "...SetPixelFormat failed\n", glw_state.hDC );
 				return TRY_PFD_FAIL_SOFT;
 			}
 		}
 
 		glw_state.pixelFormatSet = qtrue;
 	}
 
 	//
 	// startup the OpenGL subsystem by creating a context and making it current
 	//
 	if ( !glw_state.hGLRC )
 	{
 		ri.Printf( PRINT_ALL, "...creating GL context: " );
 		if ( ( glw_state.hGLRC = qwglCreateContext( glw_state.hDC ) ) == 0 )
 		{
 			ri.Printf (PRINT_ALL, "failed\n");
 
 			return TRY_PFD_FAIL_HARD;
 		}
 		ri.Printf( PRINT_ALL, "succeeded\n" );
 
 		ri.Printf( PRINT_ALL, "...making context current: " );
 		if ( !qwglMakeCurrent( glw_state.hDC, glw_state.hGLRC ) )
 		{
 			qwglDeleteContext( glw_state.hGLRC );
 			glw_state.hGLRC = NULL;
 			ri.Printf (PRINT_ALL, "failed\n");
 			return TRY_PFD_FAIL_HARD;
 		}
 		ri.Printf( PRINT_ALL, "succeeded\n" );
 	}
 
 	return TRY_PFD_SUCCESS;
 }
 
 
 /*
 ** GLW_InitDriver
 **
 ** - get a DC if one doesn't exist
 ** - create an HGLRC if one doesn't exist
 */
 static qboolean GLW_InitDriver( const char *drivername, int colorbits )
 {
 	int		tpfd;
 	int		depthbits, stencilbits;
 	static PIXELFORMATDESCRIPTOR pfd;		// save between frames since 'tr' gets cleared
 
 	ri.Printf( PRINT_ALL, "Initializing OpenGL driver\n" );
 
 	//
 	// get a DC for our window if we don't already have one allocated
 	//
 	if ( glw_state.hDC == NULL )
 	{
 		ri.Printf( PRINT_ALL, "...getting DC: " );
 
 		if ( ( glw_state.hDC = GetDC( g_wv.hWnd ) ) == NULL )
 		{
 			ri.Printf( PRINT_ALL, "failed\n" );
 			return qfalse;
 		}
 		ri.Printf( PRINT_ALL, "succeeded\n" );
 	}
 
 	if ( colorbits == 0 )
 	{
 		colorbits = glw_state.desktopBitsPixel;
 	}
 
 	//
 	// implicitly assume Z-buffer depth == desktop color depth
 	//
 	if ( r_depthbits->integer == 0 ) {
 		if ( colorbits > 16 ) {
 			depthbits = 24;
 		} else {
 			depthbits = 16;
 		}
 	} else {
 		depthbits = r_depthbits->integer;
 	}
 
 	//
 	// do not allow stencil if Z-buffer depth likely won't contain it
 	//
 	stencilbits = r_stencilbits->integer;
 	if ( depthbits < 24 )
 	{
 		stencilbits = 0;
 	}
 
 	//
 	// make two attempts to set the PIXELFORMAT
 	//
 
 	//
 	// first attempt: r_colorbits, depthbits, and r_stencilbits
 	//
 	if ( !glw_state.pixelFormatSet )
 	{
 		GLW_CreatePFD( &pfd, colorbits, depthbits, stencilbits, r_stereo->integer );
 		if ( ( tpfd = GLW_MakeContext( &pfd ) ) != TRY_PFD_SUCCESS )
 		{
 			if ( tpfd == TRY_PFD_FAIL_HARD )
 			{
 				ri.Printf( PRINT_WARNING, "...failed hard\n" );
 				return qfalse;
 			}
 
 			//
 			// punt if we've already tried the desktop bit depth and no stencil bits
 			//
 			if ( ( r_colorbits->integer == glw_state.desktopBitsPixel ) &&
 				 ( stencilbits == 0 ) )
 			{
 				ReleaseDC( g_wv.hWnd, glw_state.hDC );
 				glw_state.hDC = NULL;
 
 				ri.Printf( PRINT_ALL, "...failed to find an appropriate PIXELFORMAT\n" );
 
 				return qfalse;
 			}
 
 			//
 			// second attempt: desktop's color bits and no stencil
 			//
 			if ( colorbits > glw_state.desktopBitsPixel )
 			{
 				colorbits = glw_state.desktopBitsPixel;
 			}
 			GLW_CreatePFD( &pfd, colorbits, depthbits, 0, r_stereo->integer );
 			if ( GLW_MakeContext( &pfd ) != TRY_PFD_SUCCESS )
 			{
 				if ( glw_state.hDC )
 				{
 					ReleaseDC( g_wv.hWnd, glw_state.hDC );
 					glw_state.hDC = NULL;
 				}
 
 				ri.Printf( PRINT_ALL, "...failed to find an appropriate PIXELFORMAT\n" );
 
 				return qfalse;
 			}
 		}
 
 		/*
 		** report if stereo is desired but unavailable
 		*/
 		if ( !( pfd.dwFlags & PFD_STEREO ) && ( r_stereo->integer != 0 ) ) 
 		{
 			ri.Printf( PRINT_ALL, "...failed to select stereo pixel format\n" );
 			glConfig.stereoEnabled = qfalse;
 		}
 	}
 
 	/*
 	** store PFD specifics 
 	*/
 	glConfig.colorBits = ( int ) pfd.cColorBits;
 	glConfig.depthBits = ( int ) pfd.cDepthBits;
 	glConfig.stencilBits = ( int ) pfd.cStencilBits;
 
 	return qtrue;
 }
 
 /*
 ** GLW_CreateWindow
 **
 ** Responsible for creating the Win32 window and initializing the OpenGL driver.
 */
 #define	WINDOW_STYLE	(WS_OVERLAPPED|WS_BORDER|WS_CAPTION|WS_VISIBLE)
 static qboolean GLW_CreateWindow( const char *drivername, int width, int height, int colorbits, qboolean cdsFullscreen )
 {
 	RECT			r;
 	cvar_t			*vid_xpos, *vid_ypos;
 	int				stylebits;
 	int				x, y, w, h;
 	int				exstyle;
 
 	//
 	// register the window class if necessary
 	//
 	if ( !s_classRegistered )
 	{
 		WNDCLASS wc;
 
 		memset( &wc, 0, sizeof( wc ) );
 
 		wc.style         = 0;
 		wc.lpfnWndProc   = (WNDPROC) glw_state.wndproc;
 		wc.cbClsExtra    = 0;
 		wc.cbWndExtra    = 0;
 		wc.hInstance     = g_wv.hInstance;
 		wc.hIcon         = LoadIcon( g_wv.hInstance, MAKEINTRESOURCE(IDI_ICON1));
 		wc.hCursor       = LoadCursor (NULL,IDC_ARROW);
 		wc.hbrBackground = (void *)COLOR_GRAYTEXT;
 		wc.lpszMenuName  = 0;
 		wc.lpszClassName = WINDOW_CLASS_NAME;
 
 		if ( !RegisterClass( &wc ) )
 		{
 			ri.Error( ERR_FATAL, "GLW_CreateWindow: could not register window class" );
 		}
 		s_classRegistered = qtrue;
 		ri.Printf( PRINT_ALL, "...registered window class\n" );
 	}
 
 	//
 	// create the HWND if one does not already exist
 	//
 	if ( !g_wv.hWnd )
 	{
 		//
 		// compute width and height
 		//
 		r.left = 0;
 		r.top = 0;
 		r.right  = width;
 		r.bottom = height;
 
 		if ( cdsFullscreen || !Q_stricmp( _3DFX_DRIVER_NAME, drivername ) )
 		{
 			exstyle = WS_EX_TOPMOST;
 			stylebits = WS_POPUP|WS_VISIBLE|WS_SYSMENU;
 		}
 		else
 		{
 			exstyle = 0;
 			stylebits = WINDOW_STYLE|WS_SYSMENU;
 			AdjustWindowRect (&r, stylebits, FALSE);
 		}
 
 		w = r.right - r.left;
 		h = r.bottom - r.top;
 
 		if ( cdsFullscreen || !Q_stricmp( _3DFX_DRIVER_NAME, drivername ) )
 		{
 			x = 0;
 			y = 0;
 		}
 		else
 		{
 			vid_xpos = ri.Cvar_Get ("vid_xpos", "", 0);
 			vid_ypos = ri.Cvar_Get ("vid_ypos", "", 0);
 			x = vid_xpos->integer;
 			y = vid_ypos->integer;
 
 			// adjust window coordinates if necessary 
 			// so that the window is completely on screen
 			if ( x < 0 )
 				x = 0;
 			if ( y < 0 )
 				y = 0;
 
 			if ( w < glw_state.desktopWidth &&
 				 h < glw_state.desktopHeight )
 			{
 				if ( x + w > glw_state.desktopWidth )
 					x = ( glw_state.desktopWidth - w );
 				if ( y + h > glw_state.desktopHeight )
 					y = ( glw_state.desktopHeight - h );
 			}
 		}
 
 		g_wv.hWnd = CreateWindowEx (
 			 exstyle, 
 			 WINDOW_CLASS_NAME,
 			 "Quake 3: Arena",
 			 stylebits,
 			 x, y, w, h,
 			 NULL,
 			 NULL,
 			 g_wv.hInstance,
 			 NULL);
 
 		if ( !g_wv.hWnd )
 		{
 			ri.Error (ERR_FATAL, "GLW_CreateWindow() - Couldn't create window");
 		}
 	
 		ShowWindow( g_wv.hWnd, SW_SHOW );
 		UpdateWindow( g_wv.hWnd );
 		ri.Printf( PRINT_ALL, "...created window@%d,%d (%dx%d)\n", x, y, w, h );
 	}
 	else
 	{
 		ri.Printf( PRINT_ALL, "...window already present, CreateWindowEx skipped\n" );
 	}
 
 	if ( !GLW_InitDriver( drivername, colorbits ) )
 	{
 		ShowWindow( g_wv.hWnd, SW_HIDE );
 		DestroyWindow( g_wv.hWnd );
 		g_wv.hWnd = NULL;
 
 		return qfalse;
 	}
 
 	SetForegroundWindow( g_wv.hWnd );
 	SetFocus( g_wv.hWnd );
 
 	return qtrue;
 }
 
 static void PrintCDSError( int value )
 {
 	switch ( value )
 	{
 	case DISP_CHANGE_RESTART:
 		ri.Printf( PRINT_ALL, "restart required\n" );
 		break;
 	case DISP_CHANGE_BADPARAM:
 		ri.Printf( PRINT_ALL, "bad param\n" );
 		break;
 	case DISP_CHANGE_BADFLAGS:
 		ri.Printf( PRINT_ALL, "bad flags\n" );
 		break;
 	case DISP_CHANGE_FAILED:
 		ri.Printf( PRINT_ALL, "DISP_CHANGE_FAILED\n" );
 		break;
 	case DISP_CHANGE_BADMODE:
 		ri.Printf( PRINT_ALL, "bad mode\n" );
 		break;
 	case DISP_CHANGE_NOTUPDATED:
 		ri.Printf( PRINT_ALL, "not updated\n" );
 		break;
 	default:
 		ri.Printf( PRINT_ALL, "unknown error %d\n", value );
 		break;
 	}
 }
 
 /*
 ** GLW_SetMode
 */
 static rserr_t GLW_SetMode( const char *drivername, 
 						    int mode, 
 							int colorbits, 
 							qboolean cdsFullscreen )
 {
 	HDC hDC;
 	const char *win_fs[] = { "W", "FS" };
 	int		cdsRet;
 	DEVMODE dm;
 		
 	//
 	// print out informational messages
 	//
 	ri.Printf( PRINT_ALL, "...setting mode %d:", mode );
 	if ( !R_GetModeInfo( &glConfig.vidWidth, &glConfig.vidHeight, &glConfig.windowAspect, mode ) )
 	{
 		ri.Printf( PRINT_ALL, " invalid mode\n" );
 		return RSERR_INVALID_MODE;
 	}
 	ri.Printf( PRINT_ALL, " %d %d %s\n", glConfig.vidWidth, glConfig.vidHeight, win_fs[cdsFullscreen] );
 
 	//
 	// check our desktop attributes
 	//
 	hDC = GetDC( GetDesktopWindow() );
 	glw_state.desktopBitsPixel = GetDeviceCaps( hDC, BITSPIXEL );
 	glw_state.desktopWidth = GetDeviceCaps( hDC, HORZRES );
 	glw_state.desktopHeight = GetDeviceCaps( hDC, VERTRES );
 	ReleaseDC( GetDesktopWindow(), hDC );
 
 	//
 	// verify desktop bit depth
 	//
 	if ( glConfig.driverType != GLDRV_VOODOO )
 	{
 		if ( glw_state.desktopBitsPixel < 15 || glw_state.desktopBitsPixel == 24 )
 		{
 			if ( colorbits == 0 || ( !cdsFullscreen && colorbits >= 15 ) )
 			{
 				if ( MessageBox( NULL,
 							"It is highly unlikely that a correct\n"
 							"windowed display can be initialized with\n"
 							"the current desktop display depth.  Select\n"
 							"'OK' to try anyway.  Press 'Cancel' if you\n"
 							"have a 3Dfx Voodoo, Voodoo-2, or Voodoo Rush\n"
 							"3D accelerator installed, or if you otherwise\n"
 							"wish to quit.",
 							"Low Desktop Color Depth",
 							MB_OKCANCEL | MB_ICONEXCLAMATION ) != IDOK )
 				{
 					return RSERR_INVALID_MODE;
 				}
 			}
 		}
 	}
 
 	// do a CDS if needed
 	if ( cdsFullscreen )
 	{
 		memset( &dm, 0, sizeof( dm ) );
 		
 		dm.dmSize = sizeof( dm );
 		
 		dm.dmPelsWidth  = glConfig.vidWidth;
 		dm.dmPelsHeight = glConfig.vidHeight;
 		dm.dmFields     = DM_PELSWIDTH | DM_PELSHEIGHT;
 
 		if ( r_displayRefresh->integer != 0 )
 		{
 			dm.dmDisplayFrequency = r_displayRefresh->integer;
 			dm.dmFields |= DM_DISPLAYFREQUENCY;
 		}
 		
 		// try to change color depth if possible
 		if ( colorbits != 0 )
 		{
 			if ( glw_state.allowdisplaydepthchange )
 			{
 				dm.dmBitsPerPel = colorbits;
 				dm.dmFields |= DM_BITSPERPEL;
 				ri.Printf( PRINT_ALL, "...using colorsbits of %d\n", colorbits );
 			}
 			else
 			{
 				ri.Printf( PRINT_ALL, "WARNING:...changing depth not supported on Win95 < pre-OSR 2.x\n" );
 			}
 		}
 		else
 		{
 			ri.Printf( PRINT_ALL, "...using desktop display depth of %d\n", glw_state.desktopBitsPixel );
 		}
 
 		//
 		// if we're already in fullscreen then just create the window
 		//
 		if ( glw_state.cdsFullscreen )
 		{
 			ri.Printf( PRINT_ALL, "...already fullscreen, avoiding redundant CDS\n" );
 
 			if ( !GLW_CreateWindow ( drivername, glConfig.vidWidth, glConfig.vidHeight, colorbits, qtrue ) )
 			{
 				ri.Printf( PRINT_ALL, "...restoring display settings\n" );
 				ChangeDisplaySettings( 0, 0 );
 				return RSERR_INVALID_MODE;
 			}
 		}
 		//
 		// need to call CDS
 		//
 		else
 		{
 			ri.Printf( PRINT_ALL, "...calling CDS: " );
 			
 			// try setting the exact mode requested, because some drivers don't report
 			// the low res modes in EnumDisplaySettings, but still work
 			if ( ( cdsRet = ChangeDisplaySettings( &dm, CDS_FULLSCREEN ) ) == DISP_CHANGE_SUCCESSFUL )
 			{
 				ri.Printf( PRINT_ALL, "ok\n" );
 
 				if ( !GLW_CreateWindow ( drivername, glConfig.vidWidth, glConfig.vidHeight, colorbits, qtrue) )
 				{
 					ri.Printf( PRINT_ALL, "...restoring display settings\n" );
 					ChangeDisplaySettings( 0, 0 );
 					return RSERR_INVALID_MODE;
 				}
 				
 				glw_state.cdsFullscreen = qtrue;
 			}
 			else
 			{
 				//
 				// the exact mode failed, so scan EnumDisplaySettings for the next largest mode
 				//
 				DEVMODE		devmode;
 				int			modeNum;
 
 				ri.Printf( PRINT_ALL, "failed, " );
 				
 				PrintCDSError( cdsRet );
 			
 				ri.Printf( PRINT_ALL, "...trying next higher resolution:" );
 				
 				// we could do a better matching job here...
 				for ( modeNum = 0 ; ; modeNum++ ) {
 					if ( !EnumDisplaySettings( NULL, modeNum, &devmode ) ) {
 						modeNum = -1;
 						break;
 					}
 					if ( devmode.dmPelsWidth >= glConfig.vidWidth
 						&& devmode.dmPelsHeight >= glConfig.vidHeight
 						&& devmode.dmBitsPerPel >= 15 ) {
 						break;
 					}
 				}
 
 				if ( modeNum != -1 && ( cdsRet = ChangeDisplaySettings( &devmode, CDS_FULLSCREEN ) ) == DISP_CHANGE_SUCCESSFUL )
 				{
 					ri.Printf( PRINT_ALL, " ok\n" );
 					if ( !GLW_CreateWindow( drivername, glConfig.vidWidth, glConfig.vidHeight, colorbits, qtrue) )
 					{
 						ri.Printf( PRINT_ALL, "...restoring display settings\n" );
 						ChangeDisplaySettings( 0, 0 );
 						return RSERR_INVALID_MODE;
 					}
 					
 					glw_state.cdsFullscreen = qtrue;
 				}
 				else
 				{
 					ri.Printf( PRINT_ALL, " failed, " );
 					
 					PrintCDSError( cdsRet );
 					
 					ri.Printf( PRINT_ALL, "...restoring display settings\n" );
 					ChangeDisplaySettings( 0, 0 );
 					
 					glw_state.cdsFullscreen = qfalse;
 					glConfig.isFullscreen = qfalse;
 					if ( !GLW_CreateWindow( drivername, glConfig.vidWidth, glConfig.vidHeight, colorbits, qfalse) )
 					{
 						return RSERR_INVALID_MODE;
 					}
 					return RSERR_INVALID_FULLSCREEN;
 				}
 			}
 		}
 	}
 	else
 	{
 		if ( glw_state.cdsFullscreen )
 		{
 			ChangeDisplaySettings( 0, 0 );
 		}
 
 		glw_state.cdsFullscreen = qfalse;
 		if ( !GLW_CreateWindow( drivername, glConfig.vidWidth, glConfig.vidHeight, colorbits, qfalse ) )
 		{
 			return RSERR_INVALID_MODE;
 		}
 	}
 
 	//
 	// success, now check display frequency, although this won't be valid on Voodoo(2)
 	//
 	memset( &dm, 0, sizeof( dm ) );
 	dm.dmSize = sizeof( dm );
 	if ( EnumDisplaySettings( NULL, ENUM_CURRENT_SETTINGS, &dm ) )
 	{
 		glConfig.displayFrequency = dm.dmDisplayFrequency;
 	}
 
 	// NOTE: this is overridden later on standalone 3Dfx drivers
 	glConfig.isFullscreen = cdsFullscreen;
 
 	return RSERR_OK;
 }
 
 /*
 ** GLW_InitExtensions
 */
 static void GLW_InitExtensions( void )
 {
 	if ( !r_allowExtensions->integer )
 	{
 		ri.Printf( PRINT_ALL, "*** IGNORING OPENGL EXTENSIONS ***\n" );
 		return;
 	}
 
 	ri.Printf( PRINT_ALL, "Initializing OpenGL extensions\n" );
 
 	// GL_S3_s3tc
 	glConfig.textureCompression = TC_NONE;
 	if ( strstr( glConfig.extensions_string, "GL_S3_s3tc" ) )
 	{
 		if ( r_ext_compressed_textures->integer )
 		{
 			glConfig.textureCompression = TC_S3TC;
 			ri.Printf( PRINT_ALL, "...using GL_S3_s3tc\n" );
 		}
 		else
 		{
 			glConfig.textureCompression = TC_NONE;
 			ri.Printf( PRINT_ALL, "...ignoring GL_S3_s3tc\n" );
 		}
 	}
 	else
 	{
 		ri.Printf( PRINT_ALL, "...GL_S3_s3tc not found\n" );
 	}
 
 	// GL_EXT_texture_env_add
 	glConfig.textureEnvAddAvailable = qfalse;
 	if ( strstr( glConfig.extensions_string, "EXT_texture_env_add" ) )
 	{
 		if ( r_ext_texture_env_add->integer )
 		{
 			glConfig.textureEnvAddAvailable = qtrue;
 			ri.Printf( PRINT_ALL, "...using GL_EXT_texture_env_add\n" );
 		}
 		else
 		{
 			glConfig.textureEnvAddAvailable = qfalse;
 			ri.Printf( PRINT_ALL, "...ignoring GL_EXT_texture_env_add\n" );
 		}
 	}
 	else
 	{
 		ri.Printf( PRINT_ALL, "...GL_EXT_texture_env_add not found\n" );
 	}
 
 	// WGL_EXT_swap_control
 	qwglSwapIntervalEXT = ( BOOL (WINAPI *)(int)) qwglGetProcAddress( "wglSwapIntervalEXT" );
 	if ( qwglSwapIntervalEXT )
 	{
 		ri.Printf( PRINT_ALL, "...using WGL_EXT_swap_control\n" );
 		r_swapInterval->modified = qtrue;	// force a set next frame
 	}
 	else
 	{
 		ri.Printf( PRINT_ALL, "...WGL_EXT_swap_control not found\n" );
 	}
 
 	// GL_ARB_multitexture
 	qglMultiTexCoord2fARB = NULL;
 	qglActiveTextureARB = NULL;
 	qglClientActiveTextureARB = NULL;
 	if ( strstr( glConfig.extensions_string, "GL_ARB_multitexture" )  )
 	{
 		if ( r_ext_multitexture->integer )
 		{
 			qglMultiTexCoord2fARB = ( PFNGLMULTITEXCOORD2FARBPROC ) qwglGetProcAddress( "glMultiTexCoord2fARB" );
 			qglActiveTextureARB = ( PFNGLACTIVETEXTUREARBPROC ) qwglGetProcAddress( "glActiveTextureARB" );
 			qglClientActiveTextureARB = ( PFNGLCLIENTACTIVETEXTUREARBPROC ) qwglGetProcAddress( "glClientActiveTextureARB" );
 
 			if ( qglActiveTextureARB )
 			{
 				qglGetIntegerv( GL_MAX_ACTIVE_TEXTURES_ARB, &glConfig.maxActiveTextures );
 
 				if ( glConfig.maxActiveTextures > 1 )
 				{
 					ri.Printf( PRINT_ALL, "...using GL_ARB_multitexture\n" );
 				}
 				else
 				{
 					qglMultiTexCoord2fARB = NULL;
 					qglActiveTextureARB = NULL;
 					qglClientActiveTextureARB = NULL;
 					ri.Printf( PRINT_ALL, "...not using GL_ARB_multitexture, < 2 texture units\n" );
 				}
 			}
 		}
 		else
 		{
 			ri.Printf( PRINT_ALL, "...ignoring GL_ARB_multitexture\n" );
 		}
 	}
 	else
 	{
 		ri.Printf( PRINT_ALL, "...GL_ARB_multitexture not found\n" );
 	}
 
 	// GL_EXT_compiled_vertex_array
 	qglLockArraysEXT = NULL;
 	qglUnlockArraysEXT = NULL;
 	if ( strstr( glConfig.extensions_string, "GL_EXT_compiled_vertex_array" ) && ( glConfig.hardwareType != GLHW_RIVA128 ) )
 	{
 		if ( r_ext_compiled_vertex_array->integer )
 		{
 			ri.Printf( PRINT_ALL, "...using GL_EXT_compiled_vertex_array\n" );
 			qglLockArraysEXT = ( void ( APIENTRY * )( int, int ) ) qwglGetProcAddress( "glLockArraysEXT" );
 			qglUnlockArraysEXT = ( void ( APIENTRY * )( void ) ) qwglGetProcAddress( "glUnlockArraysEXT" );
 			if (!qglLockArraysEXT || !qglUnlockArraysEXT) {
 				ri.Error (ERR_FATAL, "bad getprocaddress");
 			}
 		}
 		else
 		{
 			ri.Printf( PRINT_ALL, "...ignoring GL_EXT_compiled_vertex_array\n" );
 		}
 	}
 	else
 	{
 		ri.Printf( PRINT_ALL, "...GL_EXT_compiled_vertex_array not found\n" );
 	}
 
 	// WGL_3DFX_gamma_control
 	qwglGetDeviceGammaRamp3DFX = NULL;
 	qwglSetDeviceGammaRamp3DFX = NULL;
 
 	if ( strstr( glConfig.extensions_string, "WGL_3DFX_gamma_control" ) )
 	{
 		if ( !r_ignorehwgamma->integer && r_ext_gamma_control->integer )
 		{
 			qwglGetDeviceGammaRamp3DFX = ( BOOL ( WINAPI * )( HDC, LPVOID ) ) qwglGetProcAddress( "wglGetDeviceGammaRamp3DFX" );
 			qwglSetDeviceGammaRamp3DFX = ( BOOL ( WINAPI * )( HDC, LPVOID ) ) qwglGetProcAddress( "wglSetDeviceGammaRamp3DFX" );
 
 			if ( qwglGetDeviceGammaRamp3DFX && qwglSetDeviceGammaRamp3DFX )
 			{
 				ri.Printf( PRINT_ALL, "...using WGL_3DFX_gamma_control\n" );
 			}
 			else
 			{
 				qwglGetDeviceGammaRamp3DFX = NULL;
 				qwglSetDeviceGammaRamp3DFX = NULL;
 			}
 		}
 		else
 		{
 			ri.Printf( PRINT_ALL, "...ignoring WGL_3DFX_gamma_control\n" );
 		}
 	}
 	else
 	{
 		ri.Printf( PRINT_ALL, "...WGL_3DFX_gamma_control not found\n" );
 	}
 }
 
 /*
 ** GLW_CheckOSVersion
 */
 static qboolean GLW_CheckOSVersion( void )
 {
 #define OSR2_BUILD_NUMBER 1111
 
 	OSVERSIONINFO	vinfo;
 
 	vinfo.dwOSVersionInfoSize = sizeof(vinfo);
 
 	glw_state.allowdisplaydepthchange = qfalse;
 
 	if ( GetVersionEx( &vinfo) )
 	{
 		if ( vinfo.dwMajorVersion > 4 )
 		{
 			glw_state.allowdisplaydepthchange = qtrue;
 		}
 		else if ( vinfo.dwMajorVersion == 4 )
 		{
 			if ( vinfo.dwPlatformId == VER_PLATFORM_WIN32_NT )
 			{
 				glw_state.allowdisplaydepthchange = qtrue;
 			}
 			else if ( vinfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS )
 			{
 				if ( LOWORD( vinfo.dwBuildNumber ) >= OSR2_BUILD_NUMBER )
 				{
 					glw_state.allowdisplaydepthchange = qtrue;
 				}
 			}
 		}
 	}
 	else
 	{
 		ri.Printf( PRINT_ALL, "GLW_CheckOSVersion() - GetVersionEx failed\n" );
 		return qfalse;
 	}
 
 	return qtrue;
 }
 
 /*
 ** GLW_LoadOpenGL
 **
 ** GLimp_win.c internal function that attempts to load and use 
 ** a specific OpenGL DLL.
 */
 static qboolean GLW_LoadOpenGL( const char *drivername )
 {
 	char buffer[1024];
 	qboolean cdsFullscreen;
 
 	Q_strncpyz( buffer, drivername, sizeof(buffer) );
 	Q_strlwr(buffer);
 
 	//
 	// determine if we're on a standalone driver
 	//
 	if ( strstr( buffer, "opengl32" ) != 0 || r_maskMinidriver->integer )
 	{
 		glConfig.driverType = GLDRV_ICD;
 	}
 	else
 	{
 		glConfig.driverType = GLDRV_STANDALONE;
 
 		ri.Printf( PRINT_ALL, "...assuming '%s' is a standalone driver\n", drivername );
 
 		if ( strstr( buffer, _3DFX_DRIVER_NAME ) )
 		{
 			glConfig.driverType = GLDRV_VOODOO;
 		}
 	}
 
 	// disable the 3Dfx splash screen
 	_putenv("FX_GLIDE_NO_SPLASH=0");
 
 	//
 	// load the driver and bind our function pointers to it
 	// 
 	if ( QGL_Init( buffer ) ) 
 	{
 		cdsFullscreen = r_fullscreen->integer;
 
 		// create the window and set up the context
 		if ( !GLW_StartDriverAndSetMode( drivername, r_mode->integer, r_colorbits->integer, cdsFullscreen ) )
 		{
 			// if we're on a 24/32-bit desktop and we're going fullscreen on an ICD,
 			// try it again but with a 16-bit desktop
 			if ( glConfig.driverType == GLDRV_ICD )
 			{
 				if ( r_colorbits->integer != 16 ||
 					 cdsFullscreen != qtrue ||
 					 r_mode->integer != 3 )
 				{
 					if ( !GLW_StartDriverAndSetMode( drivername, 3, 16, qtrue ) )
 					{
 						goto fail;
 					}
 				}
 			}
 			else
 			{
 				goto fail;
 			}
 		}
 
 		if ( glConfig.driverType == GLDRV_VOODOO )
 		{
 			glConfig.isFullscreen = qtrue;
 		}
 
 		return qtrue;
 	}
 fail:
 
 	QGL_Shutdown();
 
 	return qfalse;
 }
 
 /*
 ** GLimp_EndFrame
 */
 void GLimp_EndFrame (void)
 {
 	//
 	// swapinterval stuff
 	//
 	if ( r_swapInterval->modified ) {
 		r_swapInterval->modified = qfalse;
 
 		if ( !glConfig.stereoEnabled ) {	// why?
 			if ( qwglSwapIntervalEXT ) {
 				qwglSwapIntervalEXT( r_swapInterval->integer );
 			}
 		}
 	}
 
 
 	// don't flip if drawing to front buffer
 	if ( Q_stricmp( r_drawBuffer->string, "GL_FRONT" ) != 0 )
 	{
 		if ( glConfig.driverType > GLDRV_ICD )
 		{
 			if ( !qwglSwapBuffers( glw_state.hDC ) )
 			{
 				ri.Error( ERR_FATAL, "GLimp_EndFrame() - SwapBuffers() failed!\n" );
 			}
 		}
 		else
 		{
 			SwapBuffers( glw_state.hDC );
 		}
 	}
 
 	// check logging
 	QGL_EnableLogging( r_logFile->integer );
 }
 
 static void GLW_StartOpenGL( void )
 {
 	qboolean attemptedOpenGL32 = qfalse;
 	qboolean attempted3Dfx = qfalse;
 
 	//
 	// load and initialize the specific OpenGL driver
 	//
 	if ( !GLW_LoadOpenGL( r_glDriver->string ) )
 	{
 		if ( !Q_stricmp( r_glDriver->string, OPENGL_DRIVER_NAME ) )
 		{
 			attemptedOpenGL32 = qtrue;
 		}
 		else if ( !Q_stricmp( r_glDriver->string, _3DFX_DRIVER_NAME ) )
 		{
 			attempted3Dfx = qtrue;
 		}
 
 		if ( !attempted3Dfx )
 		{
 			attempted3Dfx = qtrue;
 			if ( GLW_LoadOpenGL( _3DFX_DRIVER_NAME ) )
 			{
 				ri.Cvar_Set( "r_glDriver", _3DFX_DRIVER_NAME );
 				r_glDriver->modified = qfalse;
 			}
 			else
 			{
 				if ( !attemptedOpenGL32 )
 				{
 					if ( !GLW_LoadOpenGL( OPENGL_DRIVER_NAME ) )
 					{
 						ri.Error( ERR_FATAL, "GLW_StartOpenGL() - could not load OpenGL subsystem\n" );
 					}
 					ri.Cvar_Set( "r_glDriver", OPENGL_DRIVER_NAME );
 					r_glDriver->modified = qfalse;
 				}
 				else
 				{
 					ri.Error( ERR_FATAL, "GLW_StartOpenGL() - could not load OpenGL subsystem\n" );
 				}
 			}
 		}
 		else if ( !attemptedOpenGL32 )
 		{
 			attemptedOpenGL32 = qtrue;
 			if ( GLW_LoadOpenGL( OPENGL_DRIVER_NAME ) )
 			{
 				ri.Cvar_Set( "r_glDriver", OPENGL_DRIVER_NAME );
 				r_glDriver->modified = qfalse;
 			}
 			else
 			{
 				ri.Error( ERR_FATAL, "GLW_StartOpenGL() - could not load OpenGL subsystem\n" );
 			}
 		}
 	}
 }
 
 /*
 ** GLimp_Init
 **
 ** This is the platform specific OpenGL initialization function.  It
 ** is responsible for loading OpenGL, initializing it, setting
 ** extensions, creating a window of the appropriate size, doing
 ** fullscreen manipulations, etc.  Its overall responsibility is
 ** to make sure that a functional OpenGL subsystem is operating
 ** when it returns to the ref.
 */
 void GLimp_Init( void )
 {
 	char	buf[1024];
 	cvar_t *lastValidRenderer = ri.Cvar_Get( "r_lastValidRenderer", "(uninitialized)", CVAR_ARCHIVE );
 	cvar_t	*cv;
 
 	ri.Printf( PRINT_ALL, "Initializing OpenGL subsystem\n" );
 
 	//
 	// check OS version to see if we can do fullscreen display changes
 	//
 	if ( !GLW_CheckOSVersion() )
 	{
 		ri.Error( ERR_FATAL, "GLimp_Init() - incorrect operating system\n" );
 	}
 
 	// save off hInstance and wndproc
 	cv = ri.Cvar_Get( "win_hinstance", "", 0 );
 	sscanf( cv->string, "%i", (int *)&g_wv.hInstance );
 
 	cv = ri.Cvar_Get( "win_wndproc", "", 0 );
 	sscanf( cv->string, "%i", (int *)&glw_state.wndproc );
 
 	r_allowSoftwareGL = ri.Cvar_Get( "r_allowSoftwareGL", "0", CVAR_LATCH );
 	r_maskMinidriver = ri.Cvar_Get( "r_maskMinidriver", "0", CVAR_LATCH );
 
 	// load appropriate DLL and initialize subsystem
 	GLW_StartOpenGL();
 
 	// get our config strings
 	Q_strncpyz( glConfig.vendor_string, qglGetString (GL_VENDOR), sizeof( glConfig.vendor_string ) );
 	Q_strncpyz( glConfig.renderer_string, qglGetString (GL_RENDERER), sizeof( glConfig.renderer_string ) );
 	Q_strncpyz( glConfig.version_string, qglGetString (GL_VERSION), sizeof( glConfig.version_string ) );
 	Q_strncpyz( glConfig.extensions_string, qglGetString (GL_EXTENSIONS), sizeof( glConfig.extensions_string ) );
 
 	//
 	// chipset specific configuration
 	//
 	Q_strncpyz( buf, glConfig.renderer_string, sizeof(buf) );
 	Q_strlwr( buf );
 
 	//
 	// NOTE: if changing cvars, do it within this block.  This allows them
 	// to be overridden when testing driver fixes, etc. but only sets
 	// them to their default state when the hardware is first installed/run.
 	//
 	if ( Q_stricmp( lastValidRenderer->string, glConfig.renderer_string ) )
 	{
 		glConfig.hardwareType = GLHW_GENERIC;
 
 		ri.Cvar_Set( "r_textureMode", "GL_LINEAR_MIPMAP_NEAREST" );
 
 		// VOODOO GRAPHICS w/ 2MB
 		if ( strstr( buf, "voodoo graphics/1 tmu/2 mb" ) )
 		{
 			ri.Cvar_Set( "r_picmip", "2" );
 			ri.Cvar_Get( "r_picmip", "1", CVAR_ARCHIVE | CVAR_LATCH );
 		}
 		else
 		{
 			ri.Cvar_Set( "r_picmip", "1" );
 
 			if ( strstr( buf, "rage 128" ) || strstr( buf, "rage128" ) )
 			{
 				ri.Cvar_Set( "r_finish", "0" );
 			}
 			// Savage3D and Savage4 should always have trilinear enabled
 			else if ( strstr( buf, "savage3d" ) || strstr( buf, "s3 savage4" ) )
 			{
 				ri.Cvar_Set( "r_texturemode", "GL_LINEAR_MIPMAP_LINEAR" );
 			}
 		}
 	}
 	
 	//
 	// this is where hardware specific workarounds that should be
 	// detected/initialized every startup should go.
 	//
 	if ( strstr( buf, "banshee" ) || strstr( buf, "voodoo3" ) )
 	{
 		glConfig.hardwareType = GLHW_3DFX_2D3D;
 	}
 	// VOODOO GRAPHICS w/ 2MB
 	else if ( strstr( buf, "voodoo graphics/1 tmu/2 mb" ) )
 	{
 	}
 	else if ( strstr( buf, "glzicd" ) )
 	{
 	}
 	else if ( strstr( buf, "rage pro" ) || strstr( buf, "Rage Pro" ) || strstr( buf, "ragepro" ) )
 	{
 		glConfig.hardwareType = GLHW_RAGEPRO;
 	}
 	else if ( strstr( buf, "rage 128" ) )
 	{
 	}
 	else if ( strstr( buf, "permedia2" ) )
 	{
 		glConfig.hardwareType = GLHW_PERMEDIA2;
 	}
 	else if ( strstr( buf, "riva 128" ) )
 	{
 		glConfig.hardwareType = GLHW_RIVA128;
 	}
 	else if ( strstr( buf, "riva tnt " ) )
 	{
 	}
 
 	ri.Cvar_Set( "r_lastValidRenderer", glConfig.renderer_string );
 
 	GLW_InitExtensions();
 	WG_CheckHardwareGamma();
 }
 
 /*
 ** GLimp_Shutdown
 **
 ** This routine does all OS specific shutdown procedures for the OpenGL
 ** subsystem.
 */
 void GLimp_Shutdown( void )
 {
 //	const char *strings[] = { "soft", "hard" };
 	const char *success[] = { "failed", "success" };
 	int retVal;
 
 	// FIXME: Brian, we need better fallbacks from partially initialized failures
 	if ( !qwglMakeCurrent ) {
 		return;
 	}
 
 	ri.Printf( PRINT_ALL, "Shutting down OpenGL subsystem\n" );
 
 	// restore gamma.  We do this first because 3Dfx's extension needs a valid OGL subsystem
 	WG_RestoreGamma();
 
 	// set current context to NULL
 	if ( qwglMakeCurrent )
 	{
 		retVal = qwglMakeCurrent( NULL, NULL ) != 0;
 
 		ri.Printf( PRINT_ALL, "...wglMakeCurrent( NULL, NULL ): %s\n", success[retVal] );
 	}
 
 	// delete HGLRC
 	if ( glw_state.hGLRC )
 	{
 		retVal = qwglDeleteContext( glw_state.hGLRC ) != 0;
 		ri.Printf( PRINT_ALL, "...deleting GL context: %s\n", success[retVal] );
 		glw_state.hGLRC = NULL;
 	}
 
 	// release DC
 	if ( glw_state.hDC )
 	{
 		retVal = ReleaseDC( g_wv.hWnd, glw_state.hDC ) != 0;
 		ri.Printf( PRINT_ALL, "...releasing DC: %s\n", success[retVal] );
 		glw_state.hDC   = NULL;
 	}
 
 	// destroy window
 	if ( g_wv.hWnd )
 	{
 		ri.Printf( PRINT_ALL, "...destroying window\n" );
 		ShowWindow( g_wv.hWnd, SW_HIDE );
 		DestroyWindow( g_wv.hWnd );
 		g_wv.hWnd = NULL;
 		glw_state.pixelFormatSet = qfalse;
 	}
 
 	// close the r_logFile
 	if ( glw_state.log_fp )
 	{
 		fclose( glw_state.log_fp );
 		glw_state.log_fp = 0;
 	}
 
 	// reset display settings
 	if ( glw_state.cdsFullscreen )
 	{
 		ri.Printf( PRINT_ALL, "...resetting display\n" );
 		ChangeDisplaySettings( 0, 0 );
 		glw_state.cdsFullscreen = qfalse;
 	}
 
 	// shutdown QGL subsystem
 	QGL_Shutdown();
 
 	memset( &glConfig, 0, sizeof( glConfig ) );
 	memset( &glState, 0, sizeof( glState ) );
 }
 
 /*
 ** GLimp_LogComment
 */
 void GLimp_LogComment( char *comment ) 
 {
 	if ( glw_state.log_fp ) {
 		fprintf( glw_state.log_fp, "%s", comment );
 	}
 }
 
 
 /*
 ===========================================================
 
 SMP acceleration
 
 ===========================================================
 */
 
 HANDLE	renderCommandsEvent;
 HANDLE	renderCompletedEvent;
 HANDLE	renderActiveEvent;
 
 void (*glimpRenderThread)( void );
 
 void GLimp_RenderThreadWrapper( void ) {
 	glimpRenderThread();
 
 	// unbind the context before we die
 	qwglMakeCurrent( glw_state.hDC, NULL );
 }
 
 /*
 =======================
 GLimp_SpawnRenderThread
 =======================
 */
 HANDLE	renderThreadHandle;
 int		renderThreadId;
 qboolean GLimp_SpawnRenderThread( void (*function)( void ) ) {
 
 	renderCommandsEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
 	renderCompletedEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
 	renderActiveEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
 
 	glimpRenderThread = function;
 
 	renderThreadHandle = CreateThread(
 	   NULL,	// LPSECURITY_ATTRIBUTES lpsa,
 	   0,		// DWORD cbStack,
 	   (LPTHREAD_START_ROUTINE)GLimp_RenderThreadWrapper,	// LPTHREAD_START_ROUTINE lpStartAddr,
 	   0,			// LPVOID lpvThreadParm,
 	   0,			//   DWORD fdwCreate,
 	   &renderThreadId );
 
 	if ( !renderThreadHandle ) {
 		return qfalse;
 	}
 
 	return qtrue;
 }
 
 static	void	*smpData;
 static	int		wglErrors;
 
 void *GLimp_RendererSleep( void ) {
 	void	*data;
 
 	if ( !qwglMakeCurrent( glw_state.hDC, NULL ) ) {
 		wglErrors++;
 	}
 
 	ResetEvent( renderActiveEvent );
 
 	// after this, the front end can exit GLimp_FrontEndSleep
 	SetEvent( renderCompletedEvent );
 
 	WaitForSingleObject( renderCommandsEvent, INFINITE );
 
 	if ( !qwglMakeCurrent( glw_state.hDC, glw_state.hGLRC ) ) {
 		wglErrors++;
 	}
 
 	ResetEvent( renderCompletedEvent );
 	ResetEvent( renderCommandsEvent );
 
 	data = smpData;
 
 	// after this, the main thread can exit GLimp_WakeRenderer
 	SetEvent( renderActiveEvent );
 
 	return data;
 }
 
 
 void GLimp_FrontEndSleep( void ) {
 	WaitForSingleObject( renderCompletedEvent, INFINITE );
 
 	if ( !qwglMakeCurrent( glw_state.hDC, glw_state.hGLRC ) ) {
 		wglErrors++;
 	}
 }
 
 
 void GLimp_WakeRenderer( void *data ) {
 	smpData = data;
 
 	if ( !qwglMakeCurrent( glw_state.hDC, NULL ) ) {
 		wglErrors++;
 	}
 
 	// after this, the renderer can continue through GLimp_RendererSleep
 	SetEvent( renderCommandsEvent );
 
 	WaitForSingleObject( renderActiveEvent, INFINITE );
 }