openmohaa/code/renderergl1/tr_init.c

/*
===========================================================================
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
===========================================================================
*/
// tr_init.c -- functions that are not called every frame

#include "tr_local.h"

glconfig_t	glConfig;
qboolean	textureFilterAnisotropic = qfalse;
int		 maxAnisotropy = 0;
float	   displayAspect = 0;
qboolean	haveClampToEdge;
glstate_t	glState;
int r_sequencenumber;

static void GfxInfo_f( void );

cvar_t	*r_flareSize;
cvar_t	*r_flareFade;

cvar_t	*r_ignoreFastPath;

cvar_t	*r_verbose;
cvar_t	*r_ignore;

cvar_t	*r_displayRefresh;

cvar_t	*r_znear;

cvar_t	*r_skipBackEnd;

cvar_t	*r_ignorehwgamma;
cvar_t	*r_measureOverdraw;

cvar_t	*r_inGameVideo;
cvar_t	*r_fastsky;
cvar_t	*r_fastdlights;
cvar_t	*r_drawSun;
cvar_t	*r_dlightBacks;

cvar_t	*r_lodscale;

cvar_t	*r_norefresh;
cvar_t	*r_drawentities;
cvar_t	*r_drawentitypoly;
cvar_t	*r_drawstaticmodels;
cvar_t	*r_drawstaticmodelpoly;
cvar_t	*r_drawbrushes;
cvar_t	*r_drawbrushmodels;
cvar_t	*r_drawstaticdecals;
cvar_t	*r_drawterrain;
cvar_t	*r_drawsprites;
cvar_t	*r_drawspherelights;
cvar_t	*r_drawworld;
cvar_t	*r_speeds;
cvar_t	*r_fullbright;
cvar_t	*r_novis;
cvar_t	*r_nocull;
cvar_t	*r_showcull;
cvar_t	*r_facePlaneCull;
cvar_t	*r_showcluster;
cvar_t	*r_nocurves;

cvar_t	*r_allowExtensions;

cvar_t	*r_ext_compressed_textures;
cvar_t	*r_ext_gamma_control;
cvar_t	*r_ext_multitexture;
cvar_t	*r_ext_compiled_vertex_array;
cvar_t	*r_ext_texture_env_add;

cvar_t	*r_ext_texture_env_combine;
cvar_t	*r_ext_aniso_filter;
cvar_t	*r_ext_max_anisotropy;
cvar_t	*r_forceClampToEdge;
cvar_t	*r_geForce3WorkAround;
cvar_t	*r_reset_tc_array;

cvar_t	*r_ignoreGLErrors;
cvar_t	*r_logFile;

cvar_t	*r_stencilbits;
cvar_t	*r_depthbits;
cvar_t	*r_colorbits;
cvar_t	*r_stereo;
cvar_t	*r_primitives;
cvar_t	*r_largemap;
cvar_t	*r_textureDetails;
cvar_t	*r_texturebits;

cvar_t	*r_drawBuffer;
cvar_t  *r_glDriver;
cvar_t	*r_lightmap;
cvar_t	*r_vertexLight;
cvar_t	*r_shadows;
cvar_t	*r_entlight_scale;
cvar_t	*r_entlight_errbound;
cvar_t	*r_entlight_cubelevel;
cvar_t	*r_entlight_cubefraction;
cvar_t	*r_entlight_maxcalc;
cvar_t	*r_flares;
cvar_t	*r_mode;
cvar_t	*r_maxmode;
cvar_t	*r_vidmode1024;
cvar_t	*r_vidmodemax;
cvar_t	*r_nobind;
cvar_t	*r_singleShader;
cvar_t	*r_lerpmodels;
cvar_t	*r_roundImagesDown;
cvar_t	*r_colorMipLevels;
cvar_t	*r_picmip;
cvar_t	*r_picmip_cap;
cvar_t	*r_showtris;
cvar_t	*r_showsky;
cvar_t	*r_shownormals;
cvar_t	*r_showhbox;
cvar_t	*r_showstaticbboxes;
cvar_t	*r_finish;
cvar_t	*r_clear;
cvar_t	*r_swapInterval;
cvar_t	*r_textureMode;
cvar_t	*r_offsetFactor;
cvar_t	*r_offsetUnits;
cvar_t	*r_gamma;
cvar_t	*r_intensity;
cvar_t	*r_lockpvs;
cvar_t	*r_noportals;
cvar_t	*r_entlightmap;
cvar_t	*r_fastentlight;
cvar_t	*r_portalOnly;

cvar_t	*r_subdivisions;
cvar_t	*r_lodCurveError;

cvar_t	*r_fullscreen;

cvar_t	*r_customwidth;
cvar_t	*r_customheight;
cvar_t	*r_customaspect;

cvar_t	*r_overBrightBits;
cvar_t	*r_mapOverBrightBits;

cvar_t	*r_debugSurface;

cvar_t	*r_showImages;
cvar_t	*r_showlod;
cvar_t	*r_showstaticlod;

cvar_t	*r_ambientScale;
cvar_t	*r_directedScale;
cvar_t	*r_debugSort;
cvar_t	*r_printShaders;
cvar_t	*r_saveFontData;

cvar_t	*r_maxpolys;
int		max_polys;
cvar_t	*r_maxpolyverts;
int		max_polyverts;
cvar_t* r_maxtermarks;
int		max_termarks;
cvar_t* r_precacheimages;

cvar_t* r_staticlod;
cvar_t* r_lodscale;
cvar_t* r_lodcap;
cvar_t* r_lodviewmodelcap;

cvar_t* r_uselod;
cvar_t* lod_LOD;
cvar_t* lod_minLOD;
cvar_t* lod_maxLOD;
cvar_t* lod_LOD_slider;
cvar_t* lod_curve_0_val;
cvar_t* lod_curve_1_val;
cvar_t* lod_curve_2_val;
cvar_t* lod_curve_3_val;
cvar_t* lod_curve_4_val;
cvar_t* lod_edit_0;
cvar_t* lod_edit_1;
cvar_t* lod_edit_2;
cvar_t* lod_edit_3;
cvar_t* lod_edit_4;
cvar_t* lod_curve_0_slider;
cvar_t* lod_curve_1_slider;
cvar_t* lod_curve_2_slider;
cvar_t* lod_curve_3_slider;
cvar_t* lod_curve_4_slider;
cvar_t* lod_pitch_val;
cvar_t* lod_zee_val;
cvar_t* lod_mesh;
cvar_t* lod_meshname;
cvar_t* lod_tikiname;
cvar_t* lod_metric;
cvar_t* lod_tris;
cvar_t* lod_position;
cvar_t* lod_save;
cvar_t* lod_tool;

cvar_t* sys_cpuid;
cvar_t* r_sse;
cvar_t* r_static_shaderdata0;
cvar_t* r_static_shaderdata1;
cvar_t* r_static_shaderdata2;
cvar_t* r_static_shaderdata3;
cvar_t* r_static_shadermultiplier0;
cvar_t* r_static_shadermultiplier1;
cvar_t* r_static_shadermultiplier2;
cvar_t* r_static_shadermultiplier3;

cvar_t* r_numdebuglines;


cvar_t* r_stipplelines;
cvar_t* r_light_lines;
cvar_t* r_light_sun_line;
cvar_t* r_light_int_scale;
cvar_t* r_light_nolight;
cvar_t* r_light_showgrid;
cvar_t* r_skyportal;
cvar_t* r_skyportal_origin;
cvar_t* r_farplane;
cvar_t* r_farplane_bias;
cvar_t* r_farplane_color;
cvar_t* r_farplane_nocull;
cvar_t* r_farplane_nofog;
cvar_t* r_skybox_farplane;
cvar_t* r_farclip;
cvar_t* r_lightcoronasize;
cvar_t* r_useglfog;
cvar_t* r_debuglines_depthmask;
cvar_t* r_smoothsmokelight;
cvar_t* r_showportal;
cvar_t* ter_minMarkRadius;
cvar_t* ter_fastMarks;
cvar_t* r_alpha_foliage1;
cvar_t* r_alpha_foliage2;
cvar_t* r_blendtrees;
cvar_t* r_blendbushes;
cvar_t* r_bumpmap;
cvar_t* r_loadjpg;
cvar_t* r_loadftx;

cvar_t* r_showSkeleton;

cvar_t* r_ext_multisample;
cvar_t* r_noborder;
cvar_t* r_ext_texture_filter_anisotropic;
cvar_t* r_stereoEnabled;
cvar_t* r_anaglyphMode;

cvar_t* r_aviMotionJpegQuality;
cvar_t* r_screenshotJpegQuality;

cvar_t* r_developer;
cvar_t* r_fps;

static char infostring[8192];

static void AssertCvarRange( cvar_t *cv, float minVal, float maxVal, qboolean shouldBeIntegral )
{
	if ( shouldBeIntegral )
	{
		if ( ( int ) cv->value != cv->integer )
		{
			ri.Printf( PRINT_WARNING, "WARNING: cvar '%s' must be integral (%f)\n", cv->name, cv->value );
			ri.Cvar_Set( cv->name, va( "%d", cv->integer ) );
		}
	}

	if ( cv->value < minVal )
	{
		ri.Printf( PRINT_WARNING, "WARNING: cvar '%s' out of range (%f < %f)\n", cv->name, cv->value, minVal );
		ri.Cvar_Set( cv->name, va( "%f", minVal ) );
	}
	else if ( cv->value > maxVal )
	{
		ri.Printf( PRINT_WARNING, "WARNING: cvar '%s' out of range (%f > %f)\n", cv->name, cv->value, maxVal );
		ri.Cvar_Set( cv->name, va( "%f", maxVal ) );
	}
}


/*
** InitOpenGL
**
** This function is responsible for initializing a valid OpenGL subsystem.  This
** is done by calling GLimp_Init (which gives us a working OGL subsystem) then
** setting variables, checking GL constants, and reporting the gfx system config
** to the user.
*/
static void InitOpenGL( void )
{
	char renderer_buffer[1024];

	//
	// initialize OS specific portions of the renderer
	//
	// GLimp_Init directly or indirectly references the following cvars:
	//		- r_fullscreen
	//		- r_glDriver
	//		- r_mode
	//		- r_(color|depth|stencil)bits
	//		- r_ignorehwgamma
	//		- r_gamma
	//
	
	if ( glConfig.vidWidth == 0 )
	{
		GLint		temp;
		
		GLimp_Init(qtrue);

		strcpy( renderer_buffer, glConfig.renderer_string );
		Q_strlwr( renderer_buffer );

		// OpenGL driver constants
		qglGetIntegerv( GL_MAX_TEXTURE_SIZE, &temp );
		glConfig.maxTextureSize = temp;

		// stubbed or broken drivers may have reported 0...
		if ( glConfig.maxTextureSize <= 0 ) 
		{
			glConfig.maxTextureSize = 0;
		}

		if (haveClampToEdge) {
			ri.Cvar_Set("r_forceClampToEdge", "1");
		}
	}

	// print info
	GfxInfo_f();

	// set default state
	GL_SetDefaultState();
}

/*
==================
GL_CheckErrors
==================
*/
void GL_CheckErrors( void ) {
	int		err;
	char	s[64];

	err = qglGetError();
	if ( err == GL_NO_ERROR ) {
		return;
	}
	if ( r_ignoreGLErrors->integer ) {
		return;
	}
	switch( err ) {
		case GL_INVALID_ENUM:
			strcpy( s, "GL_INVALID_ENUM" );
			break;
		case GL_INVALID_VALUE:
			strcpy( s, "GL_INVALID_VALUE" );
			break;
		case GL_INVALID_OPERATION:
			strcpy( s, "GL_INVALID_OPERATION" );
			break;
		case GL_STACK_OVERFLOW:
			strcpy( s, "GL_STACK_OVERFLOW" );
			break;
		case GL_STACK_UNDERFLOW:
			strcpy( s, "GL_STACK_UNDERFLOW" );
			break;
		case GL_OUT_OF_MEMORY:
			strcpy( s, "GL_OUT_OF_MEMORY" );
			break;
		default:
			Com_sprintf( s, sizeof(s), "%i", err);
			break;
	}

	ri.Error( ERR_FATAL, "GL_CheckErrors: %s", s );
}


/*
** R_GetModeInfo
*/
typedef struct vidmode_s
{
	const char *description;
	int		 width, height;
	float		pixelAspect;		// pixel width / height
} vidmode_t;

vidmode_t r_vidModes[] =
{
	{ "Mode  0: 320x240",		320,	240,	1 },
	{ "Mode  1: 400x300",		400,	300,	1 },
	{ "Mode  2: 512x384",		512,	384,	1 },
	{ "Mode  3: 640x480",		640,	480,	1 },
	{ "Mode  4: 800x600",		800,	600,	1 },
	{ "Mode  5: 960x720",		960,	720,	1 },
	{ "Mode  6: 1024x768",		1024,	768,	1 },
	{ "Mode  7: 1152x864",		1152,	864,	1 },
	{ "Mode  8: 1280x1024",		1280,	1024,	1 },
	{ "Mode  9: 1600x1200",		1600,	1200,	1 },
	{ "Mode 10: 2048x1536",		2048,	1536,	1 },
	{ "Mode 11: 856x480 (wide)",856,	480,	1 }
};
static int	s_numVidModes = ( sizeof( r_vidModes ) / sizeof( r_vidModes[0] ) );

qboolean R_GetModeInfo( int *width, int *height, float *windowAspect, int mode ) {
	vidmode_t	*vm;

	if ( mode < -1 ) {
		return qfalse;
	}
	if ( mode >= s_numVidModes ) {
		return qfalse;
	}

	if ( mode == -1 ) {
		*width = r_customwidth->integer;
		*height = r_customheight->integer;
		*windowAspect = r_customaspect->value;
		return qtrue;
	}

	vm = &r_vidModes[mode];

	*width  = vm->width;
	*height = vm->height;
	*windowAspect = (float)vm->width / ( vm->height * vm->pixelAspect );

	return qtrue;
}

/*
** R_ModeList_f
*/
static void R_ModeList_f( void )
{
	int i;

	ri.Printf( PRINT_ALL, "\n" );
	for ( i = 0; i < s_numVidModes; i++ )
	{
		ri.Printf( PRINT_ALL, "%s\n", r_vidModes[i].description );
	}
	ri.Printf( PRINT_ALL, "\n" );
}


/* 
============================================================================== 
 
						SCREEN SHOTS 

NOTE TTimo
some thoughts about the screenshots system:
screenshots get written in fs_homepath + fs_gamedir
vanilla q3 .. baseq3/screenshots/ *.tga
team arena .. missionpack/screenshots/ *.tga

two commands: "screenshot" and "screenshotJPEG"
we use statics to store a count and start writing the first screenshot/screenshot????.tga (.jpg) available
(with FS_FileExists / FS_FOpenFileWrite calls)
FIXME: the statics don't get a reinit between fs_game changes

============================================================================== 
*/ 

/* 
================== 
RB_ReadPixels

Reads an image but takes care of alignment issues for reading RGB images.

Reads a minimum offset for where the RGB data starts in the image from
integer stored at pointer offset. When the function has returned the actual
offset was written back to address offset. This address will always have an
alignment of packAlign to ensure efficient copying.

Stores the length of padding after a line of pixels to address padlen

Return value must be freed with ri.Hunk_FreeTempMemory()
================== 
*/  

byte *RB_ReadPixels(int x, int y, int width, int height, size_t *offset, int *padlen)
{
	byte *buffer, *bufstart;
	int padwidth, linelen;
	GLint packAlign;
	
	qglGetIntegerv(GL_PACK_ALIGNMENT, &packAlign);
	
	linelen = width * 3;
	padwidth = PAD(linelen, packAlign);
	
	// Allocate a few more bytes so that we can choose an alignment we like
	buffer = ri.Hunk_AllocateTempMemory(padwidth * height + *offset + packAlign - 1);
	
	bufstart = PADP((intptr_t) buffer + *offset, packAlign);
	qglReadPixels(x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, bufstart);
	
	*offset = bufstart - buffer;
	*padlen = padwidth - linelen;
	
	return buffer;
}

/*
==================
RB_TakeScreenshot
==================
*/
void RB_TakeScreenshot( int x, int y, int width, int height, char *fileName ) {
	byte *allbuf, *buffer;
	byte *srcptr, *destptr;
	byte *endline, *endmem;
	byte temp;
	
	int linelen, padlen;
	size_t offset = 18, memcount;
		
	allbuf = RB_ReadPixels(x, y, width, height, &offset, &padlen);
	buffer = allbuf + offset - 18;
	
	Com_Memset (buffer, 0, 18);
	buffer[2] = 2;		// uncompressed type
	buffer[12] = width & 255;
	buffer[13] = width >> 8;
	buffer[14] = height & 255;
	buffer[15] = height >> 8;
	buffer[16] = 24;	// pixel size

	// swap rgb to bgr and remove padding from line endings
	linelen = width * 3;
	
	srcptr = destptr = allbuf + offset;
	endmem = srcptr + (linelen + padlen) * height;
	
	while(srcptr < endmem)
	{
		endline = srcptr + linelen;

		while(srcptr < endline)
		{
			temp = srcptr[0];
			*destptr++ = srcptr[2];
			*destptr++ = srcptr[1];
			*destptr++ = temp;
			
			srcptr += 3;
		}
		
		// Skip the pad
		srcptr += padlen;
	}

	memcount = linelen * height;

	// gamma correct
	if(glConfig.deviceSupportsGamma)
		R_GammaCorrect(allbuf + offset, memcount);

	ri.FS_WriteFile(fileName, buffer, memcount + 18);

	ri.Hunk_FreeTempMemory(allbuf);
}

/* 
================== 
RB_TakeScreenshotJPEG
================== 
*/  
void RB_TakeScreenshotJPEG( int x, int y, int width, int height, char *fileName ) {
	byte *buffer;
	size_t offset = 0, memcount;
	int padlen;

	buffer = RB_ReadPixels(x, y, width, height, &offset, &padlen);
	memcount = (width * 3 + padlen) * height;

	// gamma correct
	if(glConfig.deviceSupportsGamma)
		R_GammaCorrect(buffer + offset, memcount);

	RE_SaveJPG(fileName, r_screenshotJpegQuality->integer, width, height, buffer + offset, padlen);
	ri.Hunk_FreeTempMemory(buffer);
}

/*
==================
RB_TakeScreenshotCmd
==================
*/
const void *RB_TakeScreenshotCmd( const void *data ) {
	const screenshotCommand_t	*cmd;
	
	cmd = (const screenshotCommand_t *)data;
	
	if (cmd->jpeg)
		RB_TakeScreenshotJPEG( cmd->x, cmd->y, cmd->width, cmd->height, cmd->fileName);
	else
		RB_TakeScreenshot( cmd->x, cmd->y, cmd->width, cmd->height, cmd->fileName);
	
	return (const void *)(cmd + 1);	
}

/*
==================
R_TakeScreenshot
==================
*/
void R_TakeScreenshot( int x, int y, int width, int height, char *name, qboolean jpeg ) {
	static char	fileName[MAX_OSPATH]; // bad things if two screenshots per frame?
	screenshotCommand_t	*cmd;

	cmd = R_GetCommandBuffer( sizeof( *cmd ) );
	if ( !cmd ) {
		return;
	}
	cmd->commandId = RC_SCREENSHOT;

	cmd->x = x;
	cmd->y = y;
	cmd->width = width;
	cmd->height = height;
	Q_strncpyz( fileName, name, sizeof(fileName) );
	cmd->fileName = fileName;
	cmd->jpeg = jpeg;
}

/* 
================== 
R_ScreenshotFilename
================== 
*/  
void R_ScreenshotFilename( int lastNumber, char *fileName ) {
	int		a,b,c,d;

	if ( lastNumber < 0 || lastNumber > 9999 ) {
		Com_sprintf( fileName, MAX_OSPATH, "screenshots/shot9999.tga" );
		return;
	}

	a = lastNumber / 1000;
	lastNumber -= a*1000;
	b = lastNumber / 100;
	lastNumber -= b*100;
	c = lastNumber / 10;
	lastNumber -= c*10;
	d = lastNumber;

	Com_sprintf( fileName, MAX_OSPATH, "screenshots/shot%i%i%i%i.tga"
		, a, b, c, d );
}

/* 
================== 
R_ScreenshotFilename
================== 
*/  
void R_ScreenshotFilenameJPEG( int lastNumber, char *fileName ) {
	int		a,b,c,d;

	if ( lastNumber < 0 || lastNumber > 9999 ) {
		Com_sprintf( fileName, MAX_OSPATH, "screenshots/shot9999.jpg" );
		return;
	}

	a = lastNumber / 1000;
	lastNumber -= a*1000;
	b = lastNumber / 100;
	lastNumber -= b*100;
	c = lastNumber / 10;
	lastNumber -= c*10;
	d = lastNumber;

	Com_sprintf( fileName, MAX_OSPATH, "screenshots/shot%i%i%i%i.jpg"
		, a, b, c, d );
}

/*
====================
R_ResampledScreenShot
====================
*/
void R_ResampledScreenShot(const char* filename, int destwidth, int destheight) {
	char		checkname[MAX_OSPATH];
	byte		*buffer;
	byte		*source, *allsource;
	byte		*src, *dst;
	size_t			offset = 0;
	int			padlen;
	int			x, y;
	int			r, g, b;
	float		xScale, yScale;
	int			xx, yy;

	allsource = RB_ReadPixels(0, 0, glConfig.vidWidth, glConfig.vidHeight, &offset, &padlen);
	source = allsource + offset;

	buffer = ri.Hunk_AllocateTempMemory(destheight * destwidth * 3 + 18);
	Com_Memset (buffer, 0, 18);
	buffer[2]  = 2;		// uncompressed type
	buffer[12] = destwidth & 255;
	buffer[13] = destwidth >> 8;
	buffer[14] = destheight & 255;
	buffer[15] = destheight >> 8;
	buffer[16] = 24;	// pixel size

	// resample from source
	xScale = glConfig.vidWidth / (float)(destwidth * 4);
	yScale = glConfig.vidHeight / (float)(destheight * 3);
	for ( y = 0 ; y < destheight ; y++ ) {
		for ( x = 0 ; x < destwidth ; x++ ) {
			r = g = b = 0;
			for ( yy = 0 ; yy < 3 ; yy++ ) {
				for ( xx = 0 ; xx < 4 ; xx++ ) {
					src = source + (3 * glConfig.vidWidth + padlen) * (int)((y*3 + yy) * yScale) +
						3 * (int) ((x*4 + xx) * xScale);
					r += src[0];
					g += src[1];
					b += src[2];
				}
			}
			dst = buffer + 18 + 3 * ( y * destwidth + x );
			dst[0] = b / 12;
			dst[1] = g / 12;
			dst[2] = r / 12;
		}
	}

	// gamma correct
	if ( glConfig.deviceSupportsGamma ) {
		R_GammaCorrect( buffer + 18, destheight * destwidth * 3 );
	}

	ri.FS_WriteFile( filename, buffer, destheight * destwidth * 3 + 18 );

	ri.Hunk_FreeTempMemory( buffer );
	ri.Hunk_FreeTempMemory( allsource );
}

/*
====================
R_LevelShot

levelshots are specialized 128*128 thumbnails for
the menu system, sampled down from full screen distorted images
====================
*/
void R_LevelShot( void ) {
	char		checkname[MAX_OSPATH];
	byte		*buffer;
	byte		*source, *allsource;
	byte		*src, *dst;
	size_t			offset = 0;
	int			padlen;
	int			x, y;
	int			r, g, b;
	float		xScale, yScale;
	int			xx, yy;

	Com_sprintf(checkname, sizeof(checkname), "levelshots/%s.tga", tr.world->baseName);

	allsource = RB_ReadPixels(0, 0, glConfig.vidWidth, glConfig.vidHeight, &offset, &padlen);
	source = allsource + offset;

	buffer = ri.Hunk_AllocateTempMemory(128 * 128*3 + 18);
	Com_Memset (buffer, 0, 18);
	buffer[2] = 2;		// uncompressed type
	buffer[12] = 128;
	buffer[14] = 128;
	buffer[16] = 24;	// pixel size

	// resample from source
	xScale = glConfig.vidWidth / 512.0f;
	yScale = glConfig.vidHeight / 384.0f;
	for ( y = 0 ; y < 128 ; y++ ) {
		for ( x = 0 ; x < 128 ; x++ ) {
			r = g = b = 0;
			for ( yy = 0 ; yy < 3 ; yy++ ) {
				for ( xx = 0 ; xx < 4 ; xx++ ) {
					src = source + (3 * glConfig.vidWidth + padlen) * (int)((y*3 + yy) * yScale) +
						3 * (int) ((x*4 + xx) * xScale);
					r += src[0];
					g += src[1];
					b += src[2];
				}
			}
			dst = buffer + 18 + 3 * ( y * 128 + x );
			dst[0] = b / 12;
			dst[1] = g / 12;
			dst[2] = r / 12;
		}
	}

	// gamma correct
	if ( glConfig.deviceSupportsGamma ) {
		R_GammaCorrect( buffer + 18, 128 * 128 * 3 );
	}

	ri.FS_WriteFile( checkname, buffer, 128 * 128*3 + 18 );

	ri.Hunk_FreeTempMemory(buffer);
	ri.Hunk_FreeTempMemory(allsource);

	ri.Printf( PRINT_ALL, "Wrote %s\n", checkname );
}

/* 
================== 
R_ScreenShot_f

screenshot
screenshot [silent]
screenshot [levelshot]
screenshot [filename]

Doesn't print the pacifier message if there is a second arg
================== 
*/  
void R_ScreenShot_f(void) {
	char	checkname[MAX_OSPATH];
	static int	lastNumber = -1;
	int		width, height;
	qboolean	silent;

	if (!strcmp(ri.Cmd_Argv(1), "levelshot")) {
		R_LevelShot();
		return;
	}

	if (!strcmp(ri.Cmd_Argv(1), "silent")) {
		silent = qtrue;
	} else {
		silent = qfalse;
	}

	width = 0;
	height = 0;

	if (ri.Cmd_Argc() >= 2 && !silent) {
		// explicit filename
		const char* name = ri.Cmd_Argv(1);
		if (strchr(name, '/')) {
			Q_strncpyz(checkname, name, sizeof(checkname));
		} else {
			Com_sprintf(checkname, MAX_OSPATH, "screenshots/%s.tga", ri.Cmd_Argv(1));
		}

		if (ri.Cmd_Argc() > 2) {
			width = atoi(ri.Cmd_Argv(2));
			height = atoi(ri.Cmd_Argv(3));
		}
	} else {
		// scan for a free filename

		// if we have saved a previous screenshot, don't scan
		// again, because recording demo avis can involve
		// thousands of shots
		if (lastNumber == -1) {
			lastNumber = 0;
		}
		// scan for a free number
		for (; lastNumber <= 9999; lastNumber++) {
			R_ScreenshotFilename(lastNumber, checkname);

			if (!ri.FS_FileExists(checkname))
			{
				break; // file doesn't exist
			}
		}

		if (lastNumber >= 9999) {
			ri.Printf(PRINT_ALL, "ScreenShot: Couldn't create a file\n");
			return;
		}

		lastNumber++;
	}

	if (!width || !height) {
		R_TakeScreenshot(0, 0, glConfig.vidWidth, glConfig.vidHeight, checkname, qfalse);

		if (!silent) {
			char message[64];

			Com_sprintf(message, sizeof(message), "centerprint \"%s %s\"\n", ri.LV_ConvertString("Wrote"), checkname);
			ri.Cmd_ExecuteText(EXEC_NOW, message);
		}
	} else {
		R_ResampledScreenShot(checkname, width, height);
	}
}

/*
==================
RB_TakeScreenshot
==================
*/
void R_ScreenShotJPEG_f (void) {
	char		checkname[MAX_OSPATH];
	static	int	lastNumber = -1;
	qboolean	silent;

	if ( !strcmp( ri.Cmd_Argv(1), "levelshot" ) ) {
		R_LevelShot();
		return;
	}

	if ( !strcmp( ri.Cmd_Argv(1), "silent" ) ) {
		silent = qtrue;
	} else {
		silent = qfalse;
	}

	if ( ri.Cmd_Argc() == 2 && !silent ) {
		// explicit filename
		Com_sprintf( checkname, MAX_OSPATH, "screenshots/%s.jpg", ri.Cmd_Argv( 1 ) );
	} else {
		// scan for a free filename

		// if we have saved a previous screenshot, don't scan
		// again, because recording demo avis can involve
		// thousands of shots
		if ( lastNumber == -1 ) {
			lastNumber = 0;
		}
		// scan for a free number
		for ( ; lastNumber <= 9999 ; lastNumber++ ) {
			R_ScreenshotFilenameJPEG( lastNumber, checkname );

	  if (!ri.FS_FileExists( checkname ))
	  {
		break; // file doesn't exist
	  }
		}

		if ( lastNumber == 10000 ) {
			ri.Printf (PRINT_ALL, "ScreenShot: Couldn't create a file\n"); 
			return;
 		}

		lastNumber++;
	}

	R_TakeScreenshot( 0, 0, glConfig.vidWidth, glConfig.vidHeight, checkname, qtrue );

	if ( !silent ) {
		ri.Printf (PRINT_ALL, "Wrote %s\n", checkname);
	}
} 

//============================================================================

/*
==================
RB_TakeVideoFrameCmd
==================
*/
const void *RB_TakeVideoFrameCmd( const void *data )
{
	const videoFrameCommand_t	*cmd;
	byte				*cBuf;
	size_t				memcount, linelen;
	int				padwidth, avipadwidth, padlen, avipadlen;
	GLint packAlign;
	
	cmd = (const videoFrameCommand_t *)data;
	
	qglGetIntegerv(GL_PACK_ALIGNMENT, &packAlign);

	linelen = cmd->width * 3;

	// Alignment stuff for glReadPixels
	padwidth = PAD(linelen, packAlign);
	padlen = padwidth - linelen;
	// AVI line padding
	avipadwidth = PAD(linelen, AVI_LINE_PADDING);
	avipadlen = avipadwidth - linelen;

	cBuf = PADP(cmd->captureBuffer, packAlign);
		
	qglReadPixels(0, 0, cmd->width, cmd->height, GL_RGB,
		GL_UNSIGNED_BYTE, cBuf);

	memcount = padwidth * cmd->height;

	// gamma correct
	if(glConfig.deviceSupportsGamma)
		R_GammaCorrect(cBuf, memcount);

	if(cmd->motionJpeg)
	{
		memcount = RE_SaveJPGToBuffer(cmd->encodeBuffer, linelen * cmd->height,
			r_aviMotionJpegQuality->integer,
			cmd->width, cmd->height, cBuf, padlen);
		ri.CL_WriteAVIVideoFrame(cmd->encodeBuffer, memcount);
	}
	else
	{
		byte *lineend, *memend;
		byte *srcptr, *destptr;
	
		srcptr = cBuf;
		destptr = cmd->encodeBuffer;
		memend = srcptr + memcount;
		
		// swap R and B and remove line paddings
		while(srcptr < memend)
		{
			lineend = srcptr + linelen;
			while(srcptr < lineend)
			{
				*destptr++ = srcptr[2];
				*destptr++ = srcptr[1];
				*destptr++ = srcptr[0];
				srcptr += 3;
			}
			
			Com_Memset(destptr, '\0', avipadlen);
			destptr += avipadlen;
			
			srcptr += padlen;
		}
		
		ri.CL_WriteAVIVideoFrame(cmd->encodeBuffer, avipadwidth * cmd->height);
	}

	return (const void *)(cmd + 1);	
}

//============================================================================

/*
** GL_SetDefaultState
*/
void GL_SetDefaultState( void )
{
	qglClearDepth( 1.0f );

	qglCullFace(GL_FRONT);

	qglColor4f (1,1,1,1);

	// initialize downstream texture unit if we're running
	// in a multitexture environment
	if ( qglActiveTextureARB ) {
		GL_SelectTexture( 1 );
		GL_TextureMode( r_textureMode->string );
		GL_TexEnv( GL_MODULATE );
		qglDisable( GL_TEXTURE_2D );
		GL_SelectTexture( 0 );
	}

	qglEnable(GL_TEXTURE_2D);
	GL_TextureMode( r_textureMode->string );
	GL_TexEnv( GL_MODULATE );

	qglShadeModel( GL_SMOOTH );
	qglDepthFunc( GL_LEQUAL );

	// the vertex array is always enabled, but the color and texture
	// arrays are enabled and disabled around the compiled vertex array call
	qglEnableClientState (GL_VERTEX_ARRAY);

	//
	// make sure our GL state vector is set correctly
	//
	glState.glStateBits = GLS_DEPTHTEST_DISABLE | GLS_DEPTHMASK_TRUE;

	qglPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
	qglDepthMask( GL_TRUE );
	qglDisable( GL_DEPTH_TEST );
	qglEnable( GL_SCISSOR_TEST );
	qglDisable( GL_CULL_FACE );
	qglDisable( GL_BLEND );

	qglFogi(GL_FOG_MODE, GL_LINEAR);

	glState.fFogColor[0] = 0.0;
	glState.fFogColor[1] = 0.0;
	glState.fFogColor[2] = 0.0;
	glState.fFogColor[3] = 1.0;
}

/*
==================
PrintAndAppendString
==================
*/
void PrintAndAppendString(char* string, size_t maxlen, char* fmt, ...) {
	char msg[1024];
	size_t len;
	va_list va;

	va_start(va, fmt);
	Q_vsnprintf(msg, sizeof(msg), fmt, va);
	va_end(va);

	ri.Printf(PRINT_ALL, "%s", msg);

	Q_strcat(string, maxlen, msg);
}

/*
==================
RE_GetGraphicsInfo
==================
*/
const char* RE_GetGraphicsInfo() {
	return infostring;
}

/*
================
R_PrintLongString

Workaround for ri.Printf's 1024 characters buffer limit.
================
*/
void R_PrintLongString(char* dest, size_t destsize, const char *string) {
	char buffer[1024];
	const char *p;
	int size = strlen(string);

	p = string;
	while(size > 0)
	{
		Q_strncpyz(buffer, p, sizeof (buffer) );
		PrintAndAppendString( dest, destsize, "%s", buffer );
		p += 1023;
		size -= 1023;
	}
}

/*
==================
BuildGfxInfo
==================
*/
void BuildGfxInfo(char* dest, size_t destsize) {
	cvar_t *sys_cpustring = ri.Cvar_Get( "sys_cpustring", "", 0 );
	const char *enablestrings[] =
	{
		"disabled",
		"enabled"
	};
	const char *fsstrings[] =
	{
		"windowed",
		"fullscreen"
	};

	PrintAndAppendString( dest, destsize, "\nGL_VENDOR: %s\n", glConfig.vendor_string );
	PrintAndAppendString( dest, destsize, "GL_RENDERER: %s\n", glConfig.renderer_string );
	PrintAndAppendString( dest, destsize, "GL_VERSION: %s\n", glConfig.version_string );
	PrintAndAppendString( dest, destsize, "GL_EXTENSIONS: " );
	// glConfig.extensions_string is a limited length so get the full list directly
	if ( qglGetStringi )
	{
		GLint numExtensions;
		int i;

		qglGetIntegerv( GL_NUM_EXTENSIONS, &numExtensions );
		for ( i = 0; i < numExtensions; i++ )
		{
			PrintAndAppendString( dest, destsize, "%s ", qglGetStringi( GL_EXTENSIONS, i ) );
		}
	}
	else
	{
		R_PrintLongString( dest, destsize, (char *) qglGetString( GL_EXTENSIONS ) );
	}
	PrintAndAppendString( dest, destsize, "\n" );
	PrintAndAppendString( dest, destsize, "GL_MAX_TEXTURE_SIZE: %d\n", glConfig.maxTextureSize );
	PrintAndAppendString( dest, destsize, "GL_MAX_TEXTURE_UNITS_ARB: %d\n", glConfig.numTextureUnits );
	PrintAndAppendString( dest, destsize, "\nPIXELFORMAT: color(%d-bits) Z(%d-bit) stencil(%d-bits)\n", glConfig.colorBits, glConfig.depthBits, glConfig.stencilBits );
	PrintAndAppendString( dest, destsize, "MODE: %d, %d x %d %s hz:", r_mode->integer, glConfig.vidWidth, glConfig.vidHeight, fsstrings[r_fullscreen->integer == 1] );
	if ( glConfig.displayFrequency )
	{
		PrintAndAppendString( dest, destsize, "%d\n", glConfig.displayFrequency );
	}
	else
	{
		PrintAndAppendString( dest, destsize, "N/A\n" );
	}
	if ( glConfig.deviceSupportsGamma )
	{
		PrintAndAppendString( dest, destsize, "GAMMA: hardware w/ %d overbright bits\n", tr.overbrightBits );
	}
	else
	{
		PrintAndAppendString( dest, destsize, "GAMMA: software w/ %d overbright bits\n", tr.overbrightBits );
	}
	PrintAndAppendString( dest, destsize, "CPU: %s\n", sys_cpustring->string );

	// rendering primitives
	{
		int		primitives;

		// default is to use triangles if compiled vertex arrays are present
		PrintAndAppendString( dest, destsize, "rendering primitives: " );
		primitives = r_primitives->integer;
		if ( primitives == 0 ) {
			if ( qglLockArraysEXT ) {
				primitives = 2;
			} else {
				primitives = 1;
			}
		}
		if ( primitives == -1 ) {
			PrintAndAppendString( dest, destsize, "none\n" );
		} else if ( primitives == 2 ) {
			PrintAndAppendString( dest, destsize, "single glDrawElements\n" );
		} else if ( primitives == 1 ) {
			PrintAndAppendString( dest, destsize, "multiple glArrayElement\n" );
		} else if ( primitives == 3 ) {
			PrintAndAppendString( dest, destsize, "multiple glColor4ubv + glTexCoord2fv + glVertex3fv\n" );
		}
	}

	PrintAndAppendString( dest, destsize, "texturemode: %s\n", r_textureMode->string );
	PrintAndAppendString( dest, destsize, "picmip: %d\n", r_picmip->integer );
	PrintAndAppendString( dest, destsize, "texture bits: %d\n", r_texturebits->integer );
	PrintAndAppendString( dest, destsize, "multitexture: %s\n", enablestrings[qglActiveTextureARB != 0] );
	PrintAndAppendString( dest, destsize, "compiled vertex arrays: %s\n", enablestrings[qglLockArraysEXT != 0 ] );
	PrintAndAppendString( dest, destsize, "texenv add: %s\n", enablestrings[glConfig.textureEnvAddAvailable != 0] );
	PrintAndAppendString( dest, destsize, "compressed textures: %s\n", enablestrings[glConfig.textureCompression!=TC_NONE] );
	if ( r_vertexLight->integer || glConfig.hardwareType == GLHW_PERMEDIA2 )
	{
		PrintAndAppendString( dest, destsize, "HACK: using vertex lightmap approximation\n" );
	}
	if ( glConfig.hardwareType == GLHW_RAGEPRO )
	{
		PrintAndAppendString( dest, destsize, "HACK: ragePro approximations\n" );
	}
	if ( glConfig.hardwareType == GLHW_RIVA128 )
	{
		PrintAndAppendString( dest, destsize, "HACK: riva128 approximations\n" );
	}
	if ( glConfig.smpActive ) {
		PrintAndAppendString( dest, destsize, "Using dual processor acceleration\n" );
	}
	if ( r_finish->integer ) {
		PrintAndAppendString( dest, destsize, "Forcing glFinish\n" );
	}
}

/*
================
GfxInfo_f
================
*/
void GfxInfo_f( void ) 
{
	BuildGfxInfo(infostring, sizeof(infostring));
	ri.Cvar_Set("r_gfxinfo", infostring);
}

/*
==================
FarPlaneInfo_f
==================
*/
void FarPlaneInfo_f(void) {
	ri.Printf(PRINT_ALL, "Current fog settings:\n");
	ri.Printf(PRINT_ALL, "Distance: %i\n", (int)tr.viewParms.farplane_distance);
	ri.Printf(PRINT_ALL, 
		"Color: %f  %f  %f\n",
		tr.viewParms.farplane_color[0],
		tr.viewParms.farplane_color[1],
		tr.viewParms.farplane_color[2]);
	if (tr.viewParms.farplane_cull) {
		ri.Printf(PRINT_ALL, "Cull: on\n");
	} else {
		ri.Printf(PRINT_ALL, "Cull: off\n");
	}
}

/*
==================
R_SetMode
==================
*/
qboolean R_SetMode(int mode, const glconfig_t* glConfig) {
    // FIXME: unimplemented
	ri.Printf(PRINT_WARNING, "R_SetMode is unimplemented. To change the video mode, set the \"r_mode\" variable and execute the \"vid_restart\" command.\n");
	return qfalse;
}

/*
==================
R_SetFullscreen
==================
*/
void R_SetFullscreen(qboolean fullscreen) {
    // FIXME: unimplemented
    ri.Printf(PRINT_WARNING, "R_SetFullscreen is unimplemented. To change the fullscreen mode, set the \"r_fullscreen\" variable and execute the \"vid_restart\" command.\n");
}

/*
===============
R_Register
===============
*/
void R_Register( void ) 
{
	//
	// latched and archived variables
	//
	r_glDriver = ri.Cvar_Get( "r_glDriver", OPENGL_DRIVER_NAME, CVAR_ARCHIVE | CVAR_LATCH );
	r_allowExtensions = ri.Cvar_Get( "r_allowExtensions", "1", CVAR_ARCHIVE | CVAR_LATCH );
	r_ext_compressed_textures = ri.Cvar_Get( "r_ext_compressed_textures", "0", CVAR_ARCHIVE | CVAR_LATCH );
	r_ext_gamma_control = ri.Cvar_Get( "r_ext_gamma_control", "1", CVAR_ARCHIVE | CVAR_LATCH );
	r_ext_multitexture = ri.Cvar_Get( "r_ext_multitexture", "1", CVAR_ARCHIVE | CVAR_LATCH );
	r_ext_compiled_vertex_array = ri.Cvar_Get( "r_ext_compiled_vertex_array", "1", CVAR_ARCHIVE | CVAR_LATCH);
#ifdef __linux__ // broken on linux
	r_ext_texture_env_add = ri.Cvar_Get( "r_ext_texture_env_add", "0", CVAR_ARCHIVE | CVAR_LATCH);
#else
	r_ext_texture_env_add = ri.Cvar_Get( "r_ext_texture_env_add", "1", CVAR_ARCHIVE | CVAR_LATCH);
#endif
	r_ext_texture_env_combine = ri.Cvar_Get("r_ext_texture_env_combine", "0", CVAR_ARCHIVE | CVAR_LATCH);
	r_ext_aniso_filter = ri.Cvar_Get("r_ext_aniso_filter", "0", CVAR_ARCHIVE | CVAR_LATCH);
	r_ext_max_anisotropy = ri.Cvar_Get("r_ext_max_anisotropy", "2", CVAR_ARCHIVE | CVAR_LATCH);
	r_forceClampToEdge = ri.Cvar_Get("r_forceClampToEdge", "0", CVAR_ROM);
	r_geForce3WorkAround = ri.Cvar_Get("r_geForce3WorkAround", "1", CVAR_ARCHIVE);
	r_reset_tc_array = ri.Cvar_Get("r_reset_tc_array", "1", CVAR_ARCHIVE);

	r_picmip = ri.Cvar_Get ("r_picmip", "1", CVAR_ARCHIVE | CVAR_LATCH );
	r_picmip_cap = ri.Cvar_Get ("r_picmip_cap", "0", CVAR_ARCHIVE | CVAR_LATCH );
    if (r_picmip->integer < r_picmip_cap->integer) {
        ri.Cvar_Set("r_picmip", r_picmip_cap->string);
    }

    if (r_picmip->integer < 2) {
        r_largemap = ri.Cvar_Get("r_largemap", "1", 0);
	} else {
		r_largemap = ri.Cvar_Get("r_largemap", "0", 0);
	}
	
	r_roundImagesDown = ri.Cvar_Get ("r_roundImagesDown", "1", CVAR_ARCHIVE | CVAR_LATCH );
	r_colorMipLevels = ri.Cvar_Get ("r_colorMipLevels", "0", CVAR_LATCH );
	AssertCvarRange( r_picmip, 0, 16, qtrue );
	r_textureDetails = ri.Cvar_Get("r_textureDetails", "1", 33);
	r_texturebits = ri.Cvar_Get( "r_texturebits", "0", CVAR_ARCHIVE | CVAR_LATCH );
	r_colorbits = ri.Cvar_Get( "r_colorbits", "0", CVAR_ARCHIVE | CVAR_LATCH );
	r_stereo = ri.Cvar_Get( "r_stereo", "0", CVAR_ARCHIVE | CVAR_LATCH );
#ifdef __linux__
	r_stencilbits = ri.Cvar_Get( "r_stencilbits", "0", CVAR_ARCHIVE | CVAR_LATCH );
#else
	r_stencilbits = ri.Cvar_Get( "r_stencilbits", "8", CVAR_ARCHIVE | CVAR_LATCH );
#endif
	r_depthbits = ri.Cvar_Get("r_depthbits", "0", CVAR_ARCHIVE | CVAR_LATCH);
	r_overBrightBits = ri.Cvar_Get ("r_overBrightBits", "0", CVAR_ARCHIVE | CVAR_LATCH );
	r_ignorehwgamma = ri.Cvar_Get( "r_ignorehwgamma", "0", CVAR_ARCHIVE | CVAR_LATCH);
	r_maxmode = ri.Cvar_Get("r_maxmode", "6", CVAR_ARCHIVE | CVAR_LATCH);
	r_vidmode1024 = ri.Cvar_Get("r_vidmode1024", "1", CVAR_ARCHIVE | CVAR_LATCH);
	r_vidmodemax = ri.Cvar_Get("r_vidmodemax", "1", CVAR_ARCHIVE | CVAR_LATCH);
	r_mode = ri.Cvar_Get("r_mode", "3", CVAR_ARCHIVE | CVAR_LATCH);
	
	// Added in 2.0
	//  But removed because it's kind of annoying
	//if (r_mode->integer > r_maxmode->integer)
	//{
	//	char buf[8];
	//
	//	Com_sprintf(buf, sizeof(buf), "%d", r_maxmode->integer);
	//	ri.Cvar_Set("r_mode", buf);
	//	r_mode = ri.Cvar_Get("r_mode", "3", CVAR_ARCHIVE | CVAR_LATCH);
	//}
	r_fullscreen = ri.Cvar_Get("r_fullscreen", "1", CVAR_ARCHIVE | CVAR_LATCH);
	r_customwidth = ri.Cvar_Get( "r_customwidth", "1600", CVAR_ARCHIVE | CVAR_LATCH );
	r_customheight = ri.Cvar_Get( "r_customheight", "1024", CVAR_ARCHIVE | CVAR_LATCH );
	r_customaspect = ri.Cvar_Get( "r_customaspect", "1", CVAR_ARCHIVE | CVAR_LATCH );
	r_vertexLight = ri.Cvar_Get("r_vertexLight", "0", CVAR_ARCHIVE | CVAR_LATCH);
	r_ignoreFastPath = ri.Cvar_Get("r_ignoreFastPath", "0", CVAR_ARCHIVE | CVAR_LATCH);
	r_subdivisions = ri.Cvar_Get("r_subdivisions", "4", CVAR_ARCHIVE | CVAR_LATCH);

	//
	// temporary latched variables that can only change over a restart
	//
	r_displayRefresh = ri.Cvar_Get( "r_displayRefresh", "0", CVAR_LATCH );
	AssertCvarRange( r_displayRefresh, 0, 200, qtrue );
	r_fullbright = ri.Cvar_Get ("r_fullbright", "0", CVAR_LATCH|CVAR_CHEAT );
	r_mapOverBrightBits = ri.Cvar_Get ("r_mapOverBrightBits", "1", CVAR_LATCH );
	r_intensity = ri.Cvar_Get ("r_intensity", "1", CVAR_LATCH );
	r_numdebuglines = ri.Cvar_Get("g_numdebuglines", "4096", CVAR_LATCH);
	r_singleShader = ri.Cvar_Get ("r_singleShader", "0", CVAR_CHEAT | CVAR_LATCH );

	//
	// archived variables that can change at any time
	//
	r_lerpmodels = ri.Cvar_Get("r_lerpmodels", "1", 0);
	r_lodCurveError = ri.Cvar_Get( "r_lodCurveError", "250", CVAR_ARCHIVE|CVAR_CHEAT );
	r_flares = ri.Cvar_Get ("r_flares", "0", CVAR_ARCHIVE );
	r_znear = ri.Cvar_Get( "r_znear", "4", CVAR_CHEAT );
	AssertCvarRange( r_znear, 0.001f, 200, qtrue );
	r_ignoreGLErrors = ri.Cvar_Get( "r_ignoreGLErrors", "1", CVAR_ARCHIVE );
	r_fastsky = ri.Cvar_Get( "r_fastsky", "0", 0 );
	r_fastdlights = ri.Cvar_Get("r_fastdlights", "1", CVAR_ARCHIVE | CVAR_LATCH);
	r_drawSun = ri.Cvar_Get( "r_drawSun", "0", CVAR_ARCHIVE );
	r_dlightBacks = ri.Cvar_Get( "r_dlightBacks", "1", CVAR_ARCHIVE );
	r_finish = ri.Cvar_Get ("r_finish", "0", CVAR_ARCHIVE);
	r_textureMode = ri.Cvar_Get( "r_textureMode", "GL_LINEAR_MIPMAP_NEAREST", CVAR_ARCHIVE );
	r_swapInterval = ri.Cvar_Get( "r_swapInterval", "0", CVAR_ARCHIVE );
	r_gamma = ri.Cvar_Get( "r_gamma", "1", CVAR_ARCHIVE );
	r_facePlaneCull = ri.Cvar_Get ("r_facePlaneCull", "1", CVAR_ARCHIVE );

	r_primitives = ri.Cvar_Get( "r_primitives", "0", CVAR_ARCHIVE );

	r_ambientScale = ri.Cvar_Get( "r_ambientScale", "0.6", CVAR_CHEAT );
	r_directedScale = ri.Cvar_Get( "r_directedScale", "1", CVAR_CHEAT );

	r_anaglyphMode = ri.Cvar_Get("r_anaglyphMode", "0", CVAR_ARCHIVE);

	//
	// temporary variables that can change at any time
	//
	r_showImages = ri.Cvar_Get( "r_showImages", "0", CVAR_TEMP );
	r_showlod = ri.Cvar_Get("r_showlod", "0", CVAR_TEMP);
	r_showstaticlod = ri.Cvar_Get("r_showstaticlod", "0", CVAR_TEMP);
	r_uselod = ri.Cvar_Get("r_uselod", "1", CVAR_TEMP);
	lod_LOD = ri.Cvar_Get("lod_LOD", "0", CVAR_TEMP);
	lod_minLOD = ri.Cvar_Get("lod_minLOD", "1.0", CVAR_TEMP);
	lod_maxLOD = ri.Cvar_Get("lod_maxLOD", "0.3", CVAR_TEMP);
	lod_LOD_slider = ri.Cvar_Get("lod_LOD_slider", "0.5", CVAR_TEMP);
	lod_edit_0 = ri.Cvar_Get("lod_edit_0", "0", CVAR_TEMP);
	lod_edit_1 = ri.Cvar_Get("lod_edit_1", "0", CVAR_TEMP);
	lod_edit_2 = ri.Cvar_Get("lod_edit_2", "0", CVAR_TEMP);
	lod_edit_3 = ri.Cvar_Get("lod_edit_3", "0", CVAR_TEMP);
	lod_edit_4 = ri.Cvar_Get("lod_edit_4", "0", CVAR_TEMP);
	lod_curve_0_val = ri.Cvar_Get("lod_curve_0_val", "0", CVAR_TEMP);
	lod_curve_1_val = ri.Cvar_Get("lod_curve_1_val", "0", CVAR_TEMP);
	lod_curve_2_val = ri.Cvar_Get("lod_curve_2_val", "0", CVAR_TEMP);
	lod_curve_3_val = ri.Cvar_Get("lod_curve_3_val", "0", CVAR_TEMP);
	lod_curve_4_val = ri.Cvar_Get("lod_curve_4_val", "0", CVAR_TEMP);
	lod_curve_0_slider = ri.Cvar_Get("lod_curve_0_slider", "0", CVAR_TEMP);
	lod_curve_1_slider = ri.Cvar_Get("lod_curve_1_slider", "0", CVAR_TEMP);
	lod_curve_2_slider = ri.Cvar_Get("lod_curve_2_slider", "0", CVAR_TEMP);
	lod_curve_3_slider = ri.Cvar_Get("lod_curve_3_slider", "0", CVAR_TEMP);
	lod_curve_4_slider = ri.Cvar_Get("lod_curve_4_slider", "0", CVAR_TEMP);
	lod_pitch_val = ri.Cvar_Get("lod_pitch_val", "0", CVAR_TEMP);
	lod_zee_val = ri.Cvar_Get("lod_zee_val", "0", CVAR_TEMP);
	lod_mesh = ri.Cvar_Get("lod_mesh", "0", CVAR_TEMP);
	lod_meshname = ri.Cvar_Get("lod_meshname", "", CVAR_TEMP);
	lod_tikiname = ri.Cvar_Get("lod_tikiname", "", CVAR_TEMP);
	lod_metric = ri.Cvar_Get("lod_metric", "0.0", CVAR_TEMP);
	lod_tris = ri.Cvar_Get("lod_tris", "", CVAR_TEMP);
	lod_save = ri.Cvar_Get("lod_save", "0", CVAR_TEMP);
	lod_position = ri.Cvar_Get("lod_position", "0 0 0", CVAR_TEMP);
	lod_tool = ri.Cvar_Get("lod_tool", "0", CVAR_TEMP);

	r_debugSort = ri.Cvar_Get( "r_debugSort", "0", CVAR_CHEAT );
	r_printShaders = ri.Cvar_Get( "r_printShaders", "0", 0 );

	r_nocurves = ri.Cvar_Get ("r_nocurves", "0", CVAR_CHEAT );
	r_drawworld = ri.Cvar_Get ("r_drawworld", "1", CVAR_CHEAT );
	r_lightmap = ri.Cvar_Get ("r_lightmap", "0", 0 );
	r_portalOnly = ri.Cvar_Get ("r_portalOnly", "0", CVAR_CHEAT );

	r_flareSize = ri.Cvar_Get ("r_flareSize", "40", CVAR_CHEAT);
	r_flareFade = ri.Cvar_Get ("r_flareFade", "7", CVAR_CHEAT);

	r_skipBackEnd = ri.Cvar_Get ("r_skipBackEnd", "0", CVAR_CHEAT);

	r_measureOverdraw = ri.Cvar_Get( "r_measureOverdraw", "0", CVAR_CHEAT );
	r_norefresh = ri.Cvar_Get("r_norefresh", "0", CVAR_CHEAT);
	r_drawentities = ri.Cvar_Get("r_drawentities", "1", CVAR_CHEAT);
	r_drawentitypoly = ri.Cvar_Get("r_drawentitypoly", "1", CVAR_CHEAT);
	r_drawstaticmodels = ri.Cvar_Get("r_drawstaticmodels", "1", CVAR_CHEAT);
	r_drawstaticmodelpoly = ri.Cvar_Get("r_drawstaticmodelpoly", "1", CVAR_CHEAT);
	r_drawbrushes = ri.Cvar_Get("r_drawbrushes", "1", CVAR_CHEAT);
	r_drawbrushmodels = ri.Cvar_Get("r_drawbrushmodels", "1", CVAR_CHEAT);
	r_drawstaticdecals = ri.Cvar_Get("r_drawstaticdecals", "0", 0);
	r_drawterrain = ri.Cvar_Get("r_drawterrain", "1", CVAR_CHEAT);
	r_drawsprites = ri.Cvar_Get("r_drawsprites", "1", CVAR_CHEAT);
	r_drawspherelights = ri.Cvar_Get("r_drawspherelights", "1", CVAR_CHEAT);
	r_staticlod = ri.Cvar_Get("r_staticlod", "1", CVAR_CHEAT);
	r_lodscale = ri.Cvar_Get("r_lodscale", "5", CVAR_ARCHIVE);
	r_lodcap = ri.Cvar_Get("r_lodcap", "0.35", CVAR_ARCHIVE);
	r_lodviewmodelcap = ri.Cvar_Get("r_lodviewmodelcap", "0.25", CVAR_ARCHIVE);
	r_ignore = ri.Cvar_Get( "r_ignore", "1", CVAR_CHEAT );
	r_nocull = ri.Cvar_Get ("r_nocull", "0", CVAR_CHEAT);
	r_showcull = ri.Cvar_Get("r_showcull", "0", CVAR_CHEAT);
	r_novis = ri.Cvar_Get ("r_novis", "0", CVAR_CHEAT);
	r_showcluster = ri.Cvar_Get ("r_showcluster", "0", CVAR_CHEAT);
	r_speeds = ri.Cvar_Get ("r_speeds", "0", CVAR_CHEAT);
	r_verbose = ri.Cvar_Get( "r_verbose", "0", CVAR_CHEAT );
	r_logFile = ri.Cvar_Get( "r_logFile", "0", CVAR_CHEAT );
	r_debugSurface = ri.Cvar_Get ("r_debugSurface", "0", CVAR_CHEAT);
	r_nobind = ri.Cvar_Get ("r_nobind", "0", CVAR_CHEAT);
	r_showtris = ri.Cvar_Get ("r_showtris", "0", CVAR_CHEAT);
	r_showsky = ri.Cvar_Get ("r_showsky", "0", CVAR_CHEAT);
	r_shownormals = ri.Cvar_Get ("r_shownormals", "0", CVAR_CHEAT);
	r_showhbox = ri.Cvar_Get("r_showhbox", "0", CVAR_CHEAT);
	r_showstaticbboxes = ri.Cvar_Get("r_showstaticbboxes", "0", CVAR_CHEAT);
	r_clear = ri.Cvar_Get ("r_clear", "0", CVAR_CHEAT);
	r_offsetFactor = ri.Cvar_Get( "r_offsetfactor", "-1", CVAR_CHEAT );
	r_offsetUnits = ri.Cvar_Get( "r_offsetunits", "-2", CVAR_CHEAT );
	r_drawBuffer = ri.Cvar_Get( "r_drawBuffer", "GL_BACK", CVAR_CHEAT );
	r_lockpvs = ri.Cvar_Get ("r_lockpvs", "0", CVAR_CHEAT);
	r_noportals = ri.Cvar_Get ("r_noportals", "0", CVAR_CHEAT);
	r_entlightmap = ri.Cvar_Get("r_entlightmap", "0", CVAR_CHEAT);
	r_fastentlight = ri.Cvar_Get("r_fastentlight", "1", CVAR_ARCHIVE);
	r_entlight_scale = ri.Cvar_Get("r_entlight_scale", "1.3", CVAR_CHEAT);
	r_entlight_errbound = ri.Cvar_Get("r_entlight_errbound", "6", CVAR_ARCHIVE);
	r_entlight_cubelevel = ri.Cvar_Get("r_entlight_cubelevel", "0", CVAR_ARCHIVE);
	r_entlight_cubefraction = ri.Cvar_Get("r_entlight_cubefraction", "0.5", CVAR_ARCHIVE);
	r_entlight_maxcalc = ri.Cvar_Get("r_entlight_maxcalc", "2", CVAR_ARCHIVE);
	r_shadows = ri.Cvar_Get( "cg_shadows", "1", 0 );

	r_maxpolys = ri.Cvar_Get( "r_maxpolys", va("%d", MAX_POLYS), 0);
	r_maxpolyverts = ri.Cvar_Get( "r_maxpolyverts", va("%d", MAX_POLYVERTS), 0);
	r_maxtermarks = ri.Cvar_Get("r_maxtermarks", va("%d", MAX_TERMARKS), 0);

	r_stipplelines = ri.Cvar_Get("r_stipplelines", "1", CVAR_ARCHIVE);
	r_light_lines = ri.Cvar_Get("r_light_lines", "0", CVAR_CHEAT);
	r_light_sun_line = ri.Cvar_Get("r_light_sun_line", "0", CVAR_CHEAT);
	r_light_int_scale = ri.Cvar_Get("r_light_int_scale", "0.05", CVAR_ARCHIVE);
	r_light_nolight = ri.Cvar_Get("r_light_nolight", "0", CVAR_CHEAT | CVAR_ARCHIVE);
	r_light_showgrid = ri.Cvar_Get("r_light_showgrid", "0", CVAR_CHEAT);
	r_skyportal = ri.Cvar_Get("r_skyportal", "0", 0);
	r_skyportal_origin = ri.Cvar_Get("r_skyportal_origin", "0 0 0", 0);
	r_farplane = ri.Cvar_Get("r_farplane", "0", CVAR_CHEAT);
	r_farplane_bias = ri.Cvar_Get("r_farplane_bias", "0", CVAR_CHEAT);
	r_farplane_color = ri.Cvar_Get("r_farplane_color", ".5 .5 .5", CVAR_CHEAT);
	r_farplane_nocull = ri.Cvar_Get("r_farplane_nocull", "0", CVAR_CHEAT);
	r_farplane_nofog = ri.Cvar_Get("r_farplane_nofog", "0", CVAR_CHEAT);
	r_skybox_farplane = ri.Cvar_Get("r_skybox_farplane", "0", CVAR_CHEAT);
	r_farclip = ri.Cvar_Get("r_farclip", "0", CVAR_CHEAT);
	r_skyportal = ri.Cvar_Get("r_skyportal", "0", 0);
	r_skyportal_origin = ri.Cvar_Get("r_skyportal_origin", "0 0 0", 0);
	r_lightcoronasize = ri.Cvar_Get("r_lightcoronasize", ".1", CVAR_ARCHIVE);
	r_useglfog = ri.Cvar_Get("r_useglfog", "1", 64);
	r_debuglines_depthmask = ri.Cvar_Get("r_debuglines_depthmask", "0", CVAR_ARCHIVE);
	r_smoothsmokelight = ri.Cvar_Get("vss_smoothsmokelight", "1", CVAR_ARCHIVE);
	r_showportal = ri.Cvar_Get("r_showportal", "0", 0);
	sys_cpuid = ri.Cvar_Get("sys_cpuid", "0", 0);
	r_sse = ri.Cvar_Get("r_sse", "0", CVAR_ARCHIVE);
	r_static_shaderdata0 = ri.Cvar_Get("r_static_shaderdata0", "0", CVAR_SYSTEMINFO);
	r_static_shaderdata1 = ri.Cvar_Get("r_static_shaderdata1", "0", CVAR_SYSTEMINFO);
	r_static_shaderdata2 = ri.Cvar_Get("r_static_shaderdata2", "0", CVAR_SYSTEMINFO);
	r_static_shaderdata3 = ri.Cvar_Get("r_static_shaderdata3", "0", CVAR_SYSTEMINFO);
	r_static_shadermultiplier0 = ri.Cvar_Get("r_static_shadermultiplier0", "1", CVAR_SYSTEMINFO);
	r_static_shadermultiplier1 = ri.Cvar_Get("r_static_shadermultiplier1", "1", CVAR_SYSTEMINFO);
	r_static_shadermultiplier2 = ri.Cvar_Get("r_static_shadermultiplier2", "1", CVAR_SYSTEMINFO);
	r_static_shadermultiplier3 = ri.Cvar_Get("r_static_shadermultiplier3", "1", CVAR_SYSTEMINFO);
	r_precacheimages = ri.Cvar_Get("r_precacheimages", "0", 0);
	ter_minMarkRadius = ri.Cvar_Get("ter_minMarkRadius", "8", CVAR_ARCHIVE);
	ter_fastMarks = ri.Cvar_Get("ter_fastMarks", "1", CVAR_ARCHIVE);
	r_alpha_foliage1 = ri.Cvar_Get("r_alpha_foliage1", "0.75", CVAR_CHEAT);
	r_alpha_foliage2 = ri.Cvar_Get("r_alpha_foliage2", "0.75", CVAR_CHEAT);
	r_blendtrees = ri.Cvar_Get("r_blendtrees", "0", CVAR_LATCH);
	r_blendbushes = ri.Cvar_Get("r_blendbushes", "0", CVAR_LATCH);
	r_fps = ri.Cvar_Get("fps", "0", 0);
	r_loadjpg = ri.Cvar_Get("r_loadjpg", "1", CVAR_LATCH);
	r_loadftx = ri.Cvar_Get("r_loadftx", "0", CVAR_LATCH);

	r_ext_multisample = ri.Cvar_Get("r_ext_multisample", "0", CVAR_ARCHIVE | CVAR_LATCH);
	r_noborder = ri.Cvar_Get("r_noborder", "0", CVAR_ARCHIVE | CVAR_LATCH);
	r_ext_texture_filter_anisotropic = ri.Cvar_Get("r_ext_texture_filter_anisotropic",
		"0", CVAR_ARCHIVE | CVAR_LATCH);
	r_stereoEnabled = ri.Cvar_Get("r_stereoEnabled", "0", CVAR_ARCHIVE | CVAR_LATCH);

	// make sure all the commands added here are also
	// removed in R_Shutdown
	ri.Cmd_AddCommand( "imagelist", R_ImageList_f );
	ri.Cmd_AddCommand( "shaderlist", R_ShaderList_f );
	ri.Cmd_AddCommand( "skinlist", R_SkinList_f );
	ri.Cmd_AddCommand( "modellist", R_Modellist_f );
	ri.Cmd_AddCommand( "modelist", R_ModeList_f );
	ri.Cmd_AddCommand( "screenshot", R_ScreenShot_f );
	ri.Cmd_AddCommand( "screenshotJPEG", R_ScreenShotJPEG_f );
	ri.Cmd_AddCommand( "gfxinfo", GfxInfo_f );
	ri.Cmd_AddCommand( "farplane_info", FarPlaneInfo_f );
	ri.Cmd_AddCommand( "r_infostaticmodels", R_InfoStaticModels_f );
	ri.Cmd_AddCommand( "r_infoworldtris", R_InfoWorldTris_f );

	//
	// Added in OPM
	//

	r_developer = ri.Cvar_Get("developer", "", 0);
    r_showSkeleton = ri.Cvar_Get("r_showSkeleton", "0", CVAR_CHEAT);
	r_aviMotionJpegQuality = ri.Cvar_Get("r_aviMotionJpegQuality", "90", CVAR_ARCHIVE);
    r_screenshotJpegQuality = ri.Cvar_Get("r_screenshotJpegQuality", "90", CVAR_ARCHIVE);

	ri.Cmd_AddCommand( "ter_crater", R_TerrainCrater_f );
}

void R_InitExtensions() {
	// FIXME: qglTextureEnvCombineExists
	glState.cntTexEnvExt = 0;
	glState.cntnvblendmode = 0;

	qglTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_RGB, 34165.0);
	qglTexEnvf(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, 8448.0);
	qglTexEnvf(GL_TEXTURE_ENV, GL_SOURCE0_RGB, 0x47057700);
	qglTexEnvf(GL_TEXTURE_ENV, GL_OPERAND0_RGB, 0x44400000);
	qglTexEnvf(GL_TEXTURE_ENV, GL_SOURCE1_RGB, 5890.0);
	qglTexEnvf(GL_TEXTURE_ENV, GL_OPERAND1_RGB, 0x44400000);
	qglTexEnvf(GL_TEXTURE_ENV, GL_SOURCE2_RGB, 0x47057700);
	qglTexEnvf(GL_TEXTURE_ENV, GL_OPERAND2_RGB, 770.0);
}

/*
===============
R_Init
===============
*/
void R_Init( void ) {	
	int	err;
	int i;
	byte *ptr;

	ri.Printf( PRINT_ALL, "----- R_Init -----\n" );

	// clear all our internal state
	Com_Memset( &tr, 0, sizeof( tr ) );
	Com_Memset( &backEnd, 0, sizeof( backEnd ) );
	Com_Memset( &tess, 0, sizeof( tess ) );

//	Swap_Init();

	if ( (intptr_t)tess.xyz & 15 ) {
		ri.Printf(PRINT_ALL,  "WARNING: tess.xyz not 16 byte aligned\n" );
	}
	Com_Memset( tess.constantColor255, 255, sizeof( tess.constantColor255 ) );

	tr.worldEntity.e.shaderRGBA[0] = -1;
	tr.worldEntity.e.shaderRGBA[1] = 0;
	tr.worldEntity.e.shaderRGBA[2] = -1;
	tr.worldEntity.e.shaderRGBA[3] = -1;

	//
	// init function tables
	//
	for ( i = 0; i < FUNCTABLE_SIZE; i++ )
	{
		tr.sinTable[i]		= sin( DEG2RAD( i * 360.0f / ( ( float ) ( FUNCTABLE_SIZE - 1 ) ) ) );
		tr.squareTable[i]	= ( i < FUNCTABLE_SIZE/2 ) ? 1.0f : -1.0f;
		tr.sawToothTable[i] = (float)i / FUNCTABLE_SIZE;
		tr.inverseSawToothTable[i] = 1.0f - tr.sawToothTable[i];

		if ( i < FUNCTABLE_SIZE / 2 )
		{
			if ( i < FUNCTABLE_SIZE / 4 )
			{
				tr.triangleTable[i] = ( float ) i / ( FUNCTABLE_SIZE / 4 );
			}
			else
			{
				tr.triangleTable[i] = 1.0f - tr.triangleTable[i-FUNCTABLE_SIZE / 4];
			}
		}
		else
		{
			tr.triangleTable[i] = -tr.triangleTable[i-FUNCTABLE_SIZE/2];
		}
	}

	tr.rendererhandle = ri.Milliseconds();

	if (!tr.rendererhandle) {
		tr.rendererhandle = -1;
	}

	R_NoiseInit();

	R_Sky_Init();

	R_Register();

	max_polys = r_maxpolys->integer;
	if (max_polys < MAX_POLYS)
		max_polys = MAX_POLYS;

	max_polyverts = r_maxpolyverts->integer;
	if (max_polyverts < MAX_POLYVERTS)
		max_polyverts = MAX_POLYVERTS;

	max_termarks = r_maxtermarks->integer;
	if (max_termarks < MAX_TERMARKS)
		max_termarks = MAX_TERMARKS;

	ptr = ri.Malloc(sizeof(*backEndData) + sizeof(srfPoly_t) * max_polys + sizeof(polyVert_t) * max_polyverts + sizeof(srfMarkFragment_t) * max_termarks);
	backEndData = (backEndData_t*)ptr;
	backEndData->polys = (srfPoly_t*)((char*)ptr + sizeof(*backEndData));
	backEndData->polyVerts = (polyVert_t*)((char*)ptr + sizeof(*backEndData) + sizeof(srfPoly_t) * max_polys);
	backEndData->terMarks = (srfMarkFragment_t*)((char*)ptr + sizeof(*backEndData) + sizeof(srfPoly_t) * max_polys + sizeof(polyVert_t) * max_polyverts);
	backEndData->staticModels = NULL;
	backEndData->staticModelData = NULL;
	R_InitNextFrame();

	InitOpenGL();

	R_InitExtensions();

	R_InitImages();

	R_StartupShaders();

	R_ModelInit();

	R_LevelMarksInit();

	tr.pFontDebugStrings = R_LoadFont("verdana-14");
	g_bInfoworldtris = qfalse;

	err = qglGetError();
	if ( err != GL_NO_ERROR )
		ri.Printf (PRINT_ALL, "glGetError() = 0x%x\n", err);

	ri.Printf( PRINT_ALL, "----- finished R_Init -----\n" );
}

/*
===============
RE_Shutdown
===============
*/
void RE_Shutdown( qboolean destroyWindow ) {	

	ri.Printf( PRINT_ALL, "RE_Shutdown( %i )\n", destroyWindow );

	ri.Cmd_RemoveCommand ("modellist");
	ri.Cmd_RemoveCommand ("screenshotJPEG");
	ri.Cmd_RemoveCommand ("screenshot");
	ri.Cmd_RemoveCommand ("imagelist");
	ri.Cmd_RemoveCommand ("shaderlist");
	ri.Cmd_RemoveCommand ("skinlist");
	ri.Cmd_RemoveCommand ("gfxinfo");
	ri.Cmd_RemoveCommand( "modelist" );
	ri.Cmd_RemoveCommand( "shaderstate" );


	if ( tr.registered ) {
		R_IssuePendingRenderCommands();
		R_DeleteTextures();
	}

	// shut down platform specific OpenGL stuff
	if ( destroyWindow ) {
		GLimp_Shutdown();

		Com_Memset( &glConfig, 0, sizeof( glConfig ) );
		textureFilterAnisotropic = qfalse;
		maxAnisotropy = 0;
		displayAspect = 0.0f;
		haveClampToEdge = qfalse;

		Com_Memset( &glState, 0, sizeof( glState ) );
	}

	R_ShutdownFont();

	tr.registered = qfalse;
}

//extern qboolean scr_initialized;

/*
** RE_BeginRegistration
*/
void RE_BeginRegistration(glconfig_t* glconfigOut) {

	ri.UI_LoadResource("*123");
	//scr_initialized = 0;

	R_IssuePendingRenderCommands();

	R_LevelMarksFree();
	ri.Hunk_Clear();

	*glconfigOut = glConfig;

	r_sequencenumber++;
	tr.viewCluster = -1;		// force markleafs to regenerate
	R_ClearFlares();
	RE_ClearScene();

	// Added in OPM
	//  Clear the world because some components
	//  like the mark system access the world object
	//  to free allocated marks
	R_ClearWorld();

	R_SetupShaders();
	R_InitLensFlare();
	R_LevelMarksInit();

	tr.registered = qtrue;

	//scr_initialized = 1;
	ri.UI_LoadResource("*124");
}

/*
=============
RE_EndRegistration

Touch all images to make sure they are resident
=============
*/
void RE_EndRegistration( void ) {
	R_IssuePendingRenderCommands();
	if (r_precacheimages->integer) {
		int start, end;

		start = ri.Milliseconds();

		RB_ShowImages(qtrue);

		end = ri.Milliseconds();

		ri.Printf(PRINT_ALL, "RB_ShowImages: %5.2f seconds\n", (float)((end - start) / 1000.f));
	}

	R_FreeUnusedImages();
}

/*
=============
RE_SetRenderTime
=============
*/
void RE_SetRenderTime(int t) {
	backEnd.refdef.floatTime = (long double)t / 1000.0;
	R_UpdateGhostTextures();
}

/*
@@@@@@@@@@@@@@@@@@@@@
GetRefAPI

@@@@@@@@@@@@@@@@@@@@@
*/
#ifdef USE_RENDERER_DLOPEN
Q_EXPORT refexport_t* QDECL GetRefAPI ( int apiVersion, refimport_t *rimp ) {
#else
refexport_t *GetRefAPI ( int apiVersion, refimport_t *rimp ) {
#endif

	static refexport_t	re;

	ri = *rimp;

	Com_Memset( &re, 0, sizeof( re ) );

	if ( apiVersion != REF_API_VERSION ) {
		ri.Printf(PRINT_ALL, "Mismatched REF_API_VERSION: expected %i, got %i\n", 
			REF_API_VERSION, apiVersion );
		return NULL;
	}

	R_Init();

	// the RE_ functions are Renderer Entry points

	re.Shutdown = RE_Shutdown;

	re.BeginRegistration = RE_BeginRegistration;
	re.RegisterModel = RE_RegisterModel;
	re.RegisterSkin = RE_RegisterSkin;
	re.RegisterShader = RE_RegisterShader;
	re.RegisterShaderNoMip = RE_RegisterShaderNoMip;
	re.LoadWorld = RE_LoadWorldMap;
	re.SetWorldVisData = RE_SetWorldVisData;
	re.EndRegistration = RE_EndRegistration;

	re.BeginFrame = RE_BeginFrame;
	re.EndFrame = RE_EndFrame;

	re.MarkFragments = R_MarkFragments;
	re.LerpTag = R_LerpTag;
	re.ModelBounds = R_ModelBounds;

	re.ClearScene = RE_ClearScene;
	re.AddRefEntityToScene = RE_AddRefEntityToScene;
	re.AddPolyToScene = RE_AddPolyToScene;
	re.LightForPoint = R_LightForPoint;
	re.AddLightToScene = RE_AddLightToScene;
	re.AddAdditiveLightToScene = RE_AddAdditiveLightToScene;
	re.RenderScene = RE_RenderScene;

	re.SetColor = RE_SetColor;
	re.DrawStretchPic = RE_StretchPic;
	re.DrawStretchRaw = RE_StretchRaw;
	re.UploadCinematic = RE_UploadCinematic;

	re.RegisterFont = RE_RegisterFont;
	re.RemapShader = R_RemapShader;
	re.GetEntityToken = R_GetEntityToken;
	re.inPVS = R_inPVS;

	re.TakeVideoFrame = RE_TakeVideoFrame;

	//
	// After ioquake3 imports
	//

    re.FreeModels = RE_FreeModels;
	re.EndRegistration = RE_EndRegistration;
    re.SpawnEffectModel = RE_SpawnEffectModel;
    re.RegisterServerModel = RE_RegisterServerModel;
    re.UnregisterServerModel = RE_UnregisterServerModel;
	re.RefreshShaderNoMip = RE_RefreshShaderNoMip;
	re.PrintBSPFileSizes = RE_PrintBSPFileSizes;
	re.MapVersion = RE_MapVersion;
    re.LoadFont = R_LoadFont;

    re.MarkFragmentsForInlineModel = R_MarkFragmentsForInlineModel;
    re.GetInlineModelBounds = R_GetInlineModelBounds;
    re.GetLightingForDecal = R_GetLightingForDecal;
    re.GetLightingForSmoke = R_GetLightingForSmoke;
    re.R_GatherLightSources = R_GatherLightSources;
    re.ModelRadius = R_ModelRadius;
    re.AddRefSpriteToScene = RE_AddRefSpriteToScene;
    re.AddTerrainMarkToScene = RE_AddTerrainMarkToScene;

    re.GetRenderEntity = RE_GetRenderEntity;

	re.SavePerformanceCounters = R_SavePerformanceCounters;

	re.R_Model_GetHandle = R_Model_GetHandle;
	re.SetColor = Draw_SetColor;
	re.DrawStretchPic = Draw_StretchPic;
	re.DrawStretchPic2 = Draw_StretchPic2;
	re.DrawStretchRaw = RE_StretchRaw;
	re.DebugLine = R_DebugLine;
	re.DrawTilePic = Draw_TilePic;
	re.DrawTilePicOffset = Draw_TilePicOffset;
	re.DrawTrianglePic = Draw_TrianglePic;
	re.DrawBox = DrawBox;
	re.AddBox = AddBox;
	re.Set2DWindow = Set2DWindow;
	re.Scissor = RE_Scissor;
	re.DrawLineLoop = DrawLineLoop;
	re.DrawString = R_DrawString;
	re.GetFontHeight = R_GetFontHeight;
	re.GetFontStringWidth = R_GetFontStringWidth;
	re.SwipeBegin = RE_SwipeBegin;
	re.SwipeEnd = RE_SwipeEnd;
	re.SetRenderTime = RE_SetRenderTime;
	re.Noise = R_NoiseGet4f;

	re.SetMode = R_SetMode;
	re.SetFullscreen = R_SetFullscreen;

	re.GetShaderHeight = RE_GetShaderHeight;
	re.GetShaderWidth = RE_GetShaderWidth;
	re.GetShaderName = RE_GetShaderName;
	re.GetModelName = RE_GetModelName;
	re.GetGraphicsInfo = RE_GetGraphicsInfo;
	re.ForceUpdatePose = RE_ForceUpdatePose;
	re.TIKI_Orientation = RE_TIKI_Orientation;
	re.TIKI_IsOnGround = RE_TIKI_IsOnGround;
	re.SetFrameNumber = RE_SetFrameNumber;

	re.ImageExists = R_ImageExists;
	re.CountTextureMemory = R_CountTextureMemory;

	return &re;
}