/*
===========================================================================
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 Quake III Arena source code; 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 = 0.0f;

glstate_t	glState;

static void GfxInfo_f( void );

#ifdef USE_RENDERER_DLOPEN
cvar_t  *com_altivec;
#endif

cvar_t	*r_flareSize;
cvar_t	*r_flareFade;
cvar_t	*r_flareCoeff;

cvar_t	*r_railWidth;
cvar_t	*r_railCoreWidth;
cvar_t	*r_railSegmentLength;

cvar_t	*r_ignoreFastPath;

cvar_t	*r_verbose;
cvar_t	*r_ignore;

cvar_t	*r_detailTextures;

cvar_t	*r_znear;
cvar_t	*r_zproj;
cvar_t	*r_stereoSeparation;

cvar_t	*r_smp;
cvar_t	*r_showSmp;
cvar_t	*r_skipBackEnd;

cvar_t	*r_stereoEnabled;
cvar_t	*r_anaglyphMode;

cvar_t	*r_greyscale;

cvar_t	*r_ignorehwgamma;
cvar_t	*r_measureOverdraw;

cvar_t	*r_inGameVideo;
cvar_t	*r_fastsky;
cvar_t	*r_drawSun;
cvar_t	*r_dynamiclight;
cvar_t	*r_dlightBacks;

cvar_t	*r_lodbias;
cvar_t	*r_lodscale;

cvar_t	*r_norefresh;
cvar_t	*r_drawentities;
cvar_t	*r_drawworld;
cvar_t	*r_speeds;
cvar_t	*r_fullbright;
cvar_t	*r_novis;
cvar_t	*r_nocull;
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_multitexture;
cvar_t	*r_ext_compiled_vertex_array;
cvar_t	*r_ext_texture_env_add;
cvar_t	*r_ext_texture_filter_anisotropic;
cvar_t	*r_ext_max_anisotropy;

cvar_t	*r_ignoreGLErrors;
cvar_t	*r_logFile;

cvar_t	*r_stencilbits;
cvar_t	*r_depthbits;
cvar_t	*r_colorbits;
cvar_t	*r_primitives;
cvar_t	*r_texturebits;
cvar_t  *r_ext_multisample;

cvar_t	*r_drawBuffer;
cvar_t	*r_lightmap;
cvar_t	*r_vertexLight;
cvar_t	*r_uiFullScreen;
cvar_t	*r_shadows;
cvar_t	*r_flares;
cvar_t	*r_mode;
cvar_t	*r_nobind;
cvar_t	*r_singleShader;
cvar_t	*r_roundImagesDown;
cvar_t	*r_colorMipLevels;
cvar_t	*r_picmip;
#ifdef IOQ3ZTM // CELSHADING
cvar_t	*r_celshadalgo; // Cel shading algorithm selection.
cvar_t	*r_celoutline; // Cel border width.
#endif
cvar_t	*r_showtris;
cvar_t	*r_showsky;
cvar_t	*r_shownormals;
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_portalOnly;

cvar_t	*r_subdivisions;
cvar_t	*r_lodCurveError;

cvar_t	*r_fullscreen;
cvar_t  *r_noborder;

cvar_t	*r_customwidth;
cvar_t	*r_customheight;
cvar_t	*r_customPixelAspect;

cvar_t	*r_overBrightBits;
cvar_t	*r_mapOverBrightBits;

cvar_t	*r_debugSurface;
cvar_t	*r_simpleMipMaps;

cvar_t	*r_showImages;

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

cvar_t	*r_marksOnTriangleMeshes;

cvar_t	*r_aviMotionJpegQuality;
cvar_t	*r_screenshotJpegQuality;

cvar_t	*r_maxpolys;
int		max_polys;
cvar_t	*r_maxpolyverts;
int		max_polyverts;

/*
** 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 )
{
	static qboolean firstTime = qtrue;
	char renderer_buffer[1024];

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

		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;
		}
	}

	// init command buffers and SMP
	R_InitCommandBuffers();

	if (firstTime)
	{
		firstTime = qfalse;

		// 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 = ARRAY_LEN( r_vidModes );

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

#ifdef IOQ3ZTM
	if ( mode < -2 )
#else
	if ( mode < -1 )
#endif
	{
		return qfalse;
	}
	if ( mode >= s_numVidModes ) {
		return qfalse;
	}

#ifdef IOQ3ZTM
	if ( mode == -2 ) {
		// Must set width and height to display size before calling this function!
		pixelAspect = 1.0f;
	} else
#endif
	if ( mode == -1 ) {
		*width = r_customwidth->integer;
		*height = r_customheight->integer;
		pixelAspect = r_customPixelAspect->value;
	} else {
		vm = &r_vidModes[mode];

		*width  = vm->width;
		*height = vm->height;
		pixelAspect = vm->pixelAspect;
	}

	*windowAspect = (float)*width / ( *height * 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;
}

#ifdef IOQ3ZTM // PNG_SCREENSHOTS
/* 
================== 
RB_TakeScreenshot
================== 
*/
void RB_TakeScreenshot(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_SavePNG(fileName, width, height, buffer + offset, padlen);
	ri.Hunk_FreeTempMemory(buffer);
}
#else
/* 
================== 
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);
}
#endif

/* 
================== 
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 ) {
#ifdef IOQ3ZTM // PNG_SCREENSHOTS
		Com_sprintf( fileName, MAX_OSPATH, "screenshots/shot9999.png" );
#else
		Com_sprintf( fileName, MAX_OSPATH, "screenshots/shot9999.tga" );
#endif
		return;
	}

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

#ifdef IOQ3ZTM // PNG_SCREENSHOTS
	Com_sprintf( fileName, MAX_OSPATH, "screenshots/shot%i%i%i%i.png"
		, a, b, c, d );
#else
	Com_sprintf( fileName, MAX_OSPATH, "screenshots/shot%i%i%i%i.tga"
		, a, b, c, d );
#endif
}

/* 
================== 
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_LevelShot

levelshots are specialized 128*128 thumbnails for
the menu system, sampled down from full screen distorted images
====================
*/
#ifdef IOQ3ZTM // TEAMARENA_LEVELSHOTS PNG_SCREENSHOTS
void R_LevelShot( qboolean jpg ) {
	char		fileName[MAX_OSPATH];
	byte		*source;
	byte		*resample, *resamplestart;
	size_t		offset = 0, memcount;
	int			spadlen, rpadlen;
	int			padwidth, linelen;
	GLint		packAlign;
	byte		*src, *dst;
	int			x, y;
	int			r, g, b;
	float		xScale, yScale;
	int			xx, yy;
	int			arg;
	// ZTM: NOTE: Q3 used 128x128, Team Arena used 192x192
#ifdef IOQ3ZTM // TEAMARENA_LEVELSHOTS
	int width = 192;
	int height = 192;
#else
	int width = 128;
	int height = 128;
#endif

	// Allow custom resample width/height
	arg = atoi(ri.Cmd_Argv(2));
	if (arg > 0)
		width = height = arg;

	arg = atoi(ri.Cmd_Argv(3));
	if (arg > 0)
		height = arg;

	if (width > glConfig.vidWidth)
		width = glConfig.vidWidth;
	if (height > glConfig.vidHeight)
		height = glConfig.vidHeight;

#ifdef IOQ3ZTM // TEAMARENA_LEVELSHOTS
	Com_sprintf(fileName, sizeof(fileName), "levelshots/%s_small.%s", tr.world->baseName, jpg ? "jpg" : "png");
#else
	Com_sprintf(fileName, sizeof(fileName), "levelshots/%s.%s", tr.world->baseName, jpg ? "jpg" : "png");
#endif

	source = RB_ReadPixels(0, 0, glConfig.vidWidth, glConfig.vidHeight, &offset, &spadlen);

	//
	// Based on RB_ReadPixels
	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
	resample = ri.Hunk_AllocateTempMemory(padwidth * height + offset + packAlign - 1);

	resamplestart = PADP((intptr_t) resample + offset, packAlign);

	offset = resamplestart - resample;
	rpadlen = padwidth - linelen;
	//

	// resample from source
	xScale = glConfig.vidWidth / (float)(width * 4.0f);
	yScale = glConfig.vidHeight / (float)(height * 3.0f);
	for ( y = 0 ; y < height ; y++ ) {
		for ( x = 0 ; x < width ; x++ ) {
			r = g = b = 0;
			for ( yy = 0 ; yy < 3 ; yy++ ) {
				for ( xx = 0 ; xx < 4 ; xx++ ) {
					src = source + (3 * glConfig.vidWidth + spadlen) * (int)((y*3 + yy) * yScale) +
						3 * (int) ((x*4 + xx) * xScale);
					r += src[0];
					g += src[1];
					b += src[2];
				}
			}
			dst = resample + 3 * ( y * width + x );
			dst[0] = r / 12;
			dst[1] = g / 12;
			dst[2] = b / 12;
		}
	}

	memcount = (width * 3 + rpadlen) * height;

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

	if (jpg)
		RE_SaveJPG(fileName, r_screenshotJpegQuality->integer, width, height, resample + offset, rpadlen);
	else
		RE_SavePNG(fileName, width, height, resample + offset, rpadlen);

	ri.Hunk_FreeTempMemory(resample);
	ri.Hunk_FreeTempMemory(source);

	ri.Printf( PRINT_ALL, "Wrote %s\n", fileName );
}
#else
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 );
}
#endif

/* 
================== 
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;
	qboolean	silent;
#ifdef IOQ3ZTM // TEAMARENA_LEVELSHOTS
	qboolean	levelshot;
#endif

	if ( !strcmp( ri.Cmd_Argv(1), "levelshot" ) ) {
#ifdef IOQ3ZTM // TEAMARENA_LEVELSHOTS
		R_LevelShot(qfalse);
		levelshot = qtrue;
#else
		R_LevelShot();
		return;
#endif
	}
#ifdef IOQ3ZTM // TEAMARENA_LEVELSHOTS
	else {
		levelshot = qfalse;
	}
#endif

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

#ifdef IOQ3ZTM // TEAMARENA_LEVELSHOTS PNG_SCREENSHOTS
	if (levelshot)
	{
		sprintf( checkname, "levelshots/%s.png", tr.world->baseName );
	}
	else
#endif
	if ( ri.Cmd_Argc() == 2 && !silent ) {
		// explicit filename
#ifdef IOQ3ZTM // PNG_SCREENSHOTS
		Com_sprintf( checkname, MAX_OSPATH, "screenshots/%s.png", ri.Cmd_Argv( 1 ) );
#else
		Com_sprintf( checkname, MAX_OSPATH, "screenshots/%s.tga", ri.Cmd_Argv( 1 ) );
#endif
	} 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++;
	}

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

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

void R_ScreenShotJPEG_f (void) {
	char		checkname[MAX_OSPATH];
	static	int	lastNumber = -1;
	qboolean	silent;
#ifdef IOQ3ZTM // TEAMARENA_LEVELSHOTS
	qboolean	levelshot;
#endif

	if ( !strcmp( ri.Cmd_Argv(1), "levelshot" ) ) {
#ifdef IOQ3ZTM // TEAMARENA_LEVELSHOTS
		R_LevelShot(qtrue);
		levelshot = qtrue;
#else
		R_LevelShot();
		return;
#endif
	}
#ifdef IOQ3ZTM // TEAMARENA_LEVELSHOTS
	else {
		levelshot = qfalse;
	}
#endif

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

#ifdef IOQ3ZTM // TEAMARENA_LEVELSHOTS
	if (levelshot)
	{
		sprintf( checkname, "levelshots/%s.jpg", tr.world->baseName );
	}
	else
#endif
	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 );
}


/*
================
GfxInfo_f
================
*/
void GfxInfo_f( void ) 
{
	const char *enablestrings[] =
	{
		"disabled",
		"enabled"
	};
	const char *fsstrings[] =
	{
		"windowed",
		"fullscreen"
	};

	ri.Printf( PRINT_ALL, "\nGL_VENDOR: %s\n", glConfig.vendor_string );
	ri.Printf( PRINT_ALL, "GL_RENDERER: %s\n", glConfig.renderer_string );
	ri.Printf( PRINT_ALL, "GL_VERSION: %s\n", glConfig.version_string );
	ri.Printf( PRINT_ALL, "GL_EXTENSIONS: %s\n", glConfig.extensions_string );
	ri.Printf( PRINT_ALL, "GL_MAX_TEXTURE_SIZE: %d\n", glConfig.maxTextureSize );
	ri.Printf( PRINT_ALL, "GL_MAX_TEXTURE_UNITS_ARB: %d\n", glConfig.numTextureUnits );
	ri.Printf( PRINT_ALL, "\nPIXELFORMAT: color(%d-bits) Z(%d-bit) stencil(%d-bits)\n", glConfig.colorBits, glConfig.depthBits, glConfig.stencilBits );
	ri.Printf( PRINT_ALL, "MODE: %d, %d x %d %s hz:", r_mode->integer, glConfig.vidWidth, glConfig.vidHeight, fsstrings[r_fullscreen->integer == 1] );
	if ( glConfig.displayFrequency )
	{
		ri.Printf( PRINT_ALL, "%d\n", glConfig.displayFrequency );
	}
	else
	{
		ri.Printf( PRINT_ALL, "N/A\n" );
	}
	if ( glConfig.deviceSupportsGamma )
	{
		ri.Printf( PRINT_ALL, "GAMMA: hardware w/ %d overbright bits\n", tr.overbrightBits );
	}
	else
	{
		ri.Printf( PRINT_ALL, "GAMMA: software w/ %d overbright bits\n", tr.overbrightBits );
	}

	// rendering primitives
	{
		int		primitives;

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

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

/*
===============
R_Register
===============
*/
void R_Register( void ) 
{
	#ifdef USE_RENDERER_DLOPEN
	com_altivec = ri.Cvar_Get("com_altivec", "1", CVAR_ARCHIVE);
	#endif	

	//
	// latched and archived variables
	//
	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_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);
	r_ext_texture_env_add = ri.Cvar_Get( "r_ext_texture_env_add", "1", CVAR_ARCHIVE | CVAR_LATCH);

	r_ext_texture_filter_anisotropic = ri.Cvar_Get( "r_ext_texture_filter_anisotropic",
			"0", CVAR_ARCHIVE | CVAR_LATCH );
	r_ext_max_anisotropy = ri.Cvar_Get( "r_ext_max_anisotropy", "2", CVAR_ARCHIVE | CVAR_LATCH );

#ifdef TURTLEARENA
	r_picmip = ri.Cvar_Get ("r_picmip", "0", CVAR_ARCHIVE | CVAR_LATCH );
#else
	r_picmip = ri.Cvar_Get ("r_picmip", "1", CVAR_ARCHIVE | CVAR_LATCH );
#endif
	r_roundImagesDown = ri.Cvar_Get ("r_roundImagesDown", "1", CVAR_ARCHIVE | CVAR_LATCH );
	r_colorMipLevels = ri.Cvar_Get ("r_colorMipLevels", "0", CVAR_LATCH );
	ri.Cvar_CheckRange( r_picmip, 0, 16, qtrue );
	r_detailTextures = ri.Cvar_Get( "r_detailtextures", "1", CVAR_ARCHIVE | CVAR_LATCH );
#ifdef TURTLEARENA
	r_texturebits = ri.Cvar_Get( "r_texturebits", "32", CVAR_ARCHIVE | CVAR_LATCH );
#else
	r_texturebits = ri.Cvar_Get( "r_texturebits", "0", CVAR_ARCHIVE | CVAR_LATCH );
#endif
	r_colorbits = ri.Cvar_Get( "r_colorbits", "0", CVAR_ARCHIVE | CVAR_LATCH );
	r_stencilbits = ri.Cvar_Get( "r_stencilbits", "8", CVAR_ARCHIVE | CVAR_LATCH );
	r_depthbits = ri.Cvar_Get( "r_depthbits", "0", CVAR_ARCHIVE | CVAR_LATCH );
	r_ext_multisample = ri.Cvar_Get( "r_ext_multisample", "0", CVAR_ARCHIVE | CVAR_LATCH );
	ri.Cvar_CheckRange( r_ext_multisample, 0, 4, qtrue );
	r_overBrightBits = ri.Cvar_Get ("r_overBrightBits", "0", CVAR_ARCHIVE | CVAR_LATCH );
	r_ignorehwgamma = ri.Cvar_Get( "r_ignorehwgamma", "0", CVAR_ARCHIVE | CVAR_LATCH);
#ifdef IOQ3ZTM // ZTM: Default to display resolution!
	r_mode = ri.Cvar_Get( "r_mode", "-2", CVAR_ARCHIVE | CVAR_LATCH );
#else
	r_mode = ri.Cvar_Get( "r_mode", "3", CVAR_ARCHIVE | CVAR_LATCH );
#endif
	r_fullscreen = ri.Cvar_Get( "r_fullscreen", "1", CVAR_ARCHIVE );
	r_noborder = ri.Cvar_Get("r_noborder", "0", CVAR_ARCHIVE);
	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_customPixelAspect = ri.Cvar_Get( "r_customPixelAspect", "1", CVAR_ARCHIVE | CVAR_LATCH );
	r_simpleMipMaps = ri.Cvar_Get( "r_simpleMipMaps", "1", CVAR_ARCHIVE | CVAR_LATCH );
	r_vertexLight = ri.Cvar_Get( "r_vertexLight", "0", CVAR_ARCHIVE | CVAR_LATCH );
	r_uiFullScreen = ri.Cvar_Get( "r_uifullscreen", "0", 0);
	r_subdivisions = ri.Cvar_Get ("r_subdivisions", "4", CVAR_ARCHIVE | CVAR_LATCH);
	r_smp = ri.Cvar_Get( "r_smp", "0", CVAR_ARCHIVE | CVAR_LATCH);
	r_stereoEnabled = ri.Cvar_Get( "r_stereoEnabled", "0", CVAR_ARCHIVE | CVAR_LATCH);
	r_ignoreFastPath = ri.Cvar_Get( "r_ignoreFastPath", "1", CVAR_ARCHIVE | CVAR_LATCH );
	r_greyscale = ri.Cvar_Get("r_greyscale", "0", CVAR_ARCHIVE | CVAR_LATCH);
	ri.Cvar_CheckRange(r_greyscale, 0, 1, qfalse);

	//
	// temporary latched variables that can only change over a restart
	//
	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_singleShader = ri.Cvar_Get ("r_singleShader", "0", CVAR_CHEAT | CVAR_LATCH );

	//
	// archived variables that can change at any time
	//
	r_lodCurveError = ri.Cvar_Get( "r_lodCurveError", "250", CVAR_ARCHIVE|CVAR_CHEAT );
	r_lodbias = ri.Cvar_Get( "r_lodbias", "0", CVAR_ARCHIVE );
#ifdef IOQ3ZTM // Enable light flares by default
	r_flares = ri.Cvar_Get ("r_flares", "1", CVAR_ARCHIVE );
#else
	r_flares = ri.Cvar_Get ("r_flares", "0", CVAR_ARCHIVE );
#endif
	r_znear = ri.Cvar_Get( "r_znear", "4", CVAR_CHEAT );
	ri.Cvar_CheckRange( r_znear, 0.001f, 200, qfalse );
	r_zproj = ri.Cvar_Get( "r_zproj", "64", CVAR_ARCHIVE );
	r_stereoSeparation = ri.Cvar_Get( "r_stereoSeparation", "64", CVAR_ARCHIVE );
	r_ignoreGLErrors = ri.Cvar_Get( "r_ignoreGLErrors", "1", CVAR_ARCHIVE );
	r_fastsky = ri.Cvar_Get( "r_fastsky", "0", CVAR_ARCHIVE );
	r_inGameVideo = ri.Cvar_Get( "r_inGameVideo", "1", CVAR_ARCHIVE );
	r_drawSun = ri.Cvar_Get( "r_drawSun", "0", CVAR_ARCHIVE );
	r_dynamiclight = ri.Cvar_Get( "r_dynamiclight", "1", CVAR_ARCHIVE );
	r_dlightBacks = ri.Cvar_Get( "r_dlightBacks", "1", CVAR_ARCHIVE );
	r_finish = ri.Cvar_Get ("r_finish", "0", CVAR_ARCHIVE);
#ifdef TURTLEARENA
	r_textureMode = ri.Cvar_Get( "r_textureMode", "GL_LINEAR_MIPMAP_LINEAR", CVAR_ARCHIVE );
#else
	r_textureMode = ri.Cvar_Get( "r_textureMode", "GL_LINEAR_MIPMAP_NEAREST", CVAR_ARCHIVE );
#endif
	r_swapInterval = ri.Cvar_Get( "r_swapInterval", "0",
					CVAR_ARCHIVE | CVAR_LATCH );
	r_gamma = ri.Cvar_Get( "r_gamma", "1", CVAR_ARCHIVE );
	r_facePlaneCull = ri.Cvar_Get ("r_facePlaneCull", "1", CVAR_ARCHIVE );

	r_railWidth = ri.Cvar_Get( "r_railWidth", "16", CVAR_ARCHIVE );
	r_railCoreWidth = ri.Cvar_Get( "r_railCoreWidth", "6", CVAR_ARCHIVE );
	r_railSegmentLength = ri.Cvar_Get( "r_railSegmentLength", "32", 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_debugLight = ri.Cvar_Get( "r_debuglight", "0", CVAR_TEMP );
	r_debugSort = ri.Cvar_Get( "r_debugSort", "0", CVAR_CHEAT );
	r_printShaders = ri.Cvar_Get( "r_printShaders", "0", 0 );
	r_saveFontData = ri.Cvar_Get( "r_saveFontData", "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_flareCoeff = ri.Cvar_Get ("r_flareCoeff", FLARE_STDCOEFF, CVAR_CHEAT);

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

	r_measureOverdraw = ri.Cvar_Get( "r_measureOverdraw", "0", CVAR_CHEAT );
	r_lodscale = ri.Cvar_Get( "r_lodscale", "5", CVAR_CHEAT );
	r_norefresh = ri.Cvar_Get ("r_norefresh", "0", CVAR_CHEAT);
	r_drawentities = ri.Cvar_Get ("r_drawentities", "1", CVAR_CHEAT );
	r_ignore = ri.Cvar_Get( "r_ignore", "1", CVAR_CHEAT );
	r_nocull = ri.Cvar_Get ("r_nocull", "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);
#ifdef IOQ3ZTM // CELSHADING
	r_celshadalgo = ri.Cvar_Get ("r_celshadalgo", "0", CVAR_ARCHIVE|CVAR_LATCH);
	r_celoutline = ri.Cvar_Get("r_celoutline","0", CVAR_ARCHIVE);
#endif
	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_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_shadows = ri.Cvar_Get( "cg_shadows", "1", 0 );

	r_marksOnTriangleMeshes = ri.Cvar_Get("r_marksOnTriangleMeshes", "1", CVAR_ARCHIVE);

	r_aviMotionJpegQuality = ri.Cvar_Get("r_aviMotionJpegQuality", "90", CVAR_ARCHIVE);
	r_screenshotJpegQuality = ri.Cvar_Get("r_screenshotJpegQuality", "90", CVAR_ARCHIVE);

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

	// 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( "minimize", GLimp_Minimize );
}

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

	ri.Printf(PRINT_DEVELOPER, "----- 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 ) );

#ifdef IOQ3ZTM
	if(sizeof(glconfig_t) != 11340)
		ri.Error( ERR_FATAL, "Mod ABI incompatible: sizeof(glconfig_t) == %u != 11340", (unsigned int) sizeof(glconfig_t));
#else
	if(sizeof(glconfig_t) != 11332)
		ri.Error( ERR_FATAL, "Mod ABI incompatible: sizeof(glconfig_t) == %u != 11332", (unsigned int) sizeof(glconfig_t));
#endif

//	Swap_Init();

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

#ifdef IOQ3ZTM // IOSTVEF_NOISE
	R_NoiseInit();
#endif

	//
	// 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];
#ifdef IOQ3ZTM // IOSTVEF_NOISE
		tr.noiseTable[i] = R_NoiseGet4f(0, 0, 0, i);
#endif

		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];
		}
	}

	R_InitFogTable();

#ifndef IOQ3ZTM // IOSTVEF_NOISE
	R_NoiseInit();
#endif

	R_Register();

#ifdef TA_BLOOM
	R_BloomInit();
#endif

	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;

	ptr = ri.Hunk_Alloc( sizeof( *backEndData[0] ) + sizeof(srfPoly_t) * max_polys + sizeof(polyVert_t) * max_polyverts, h_low);
	backEndData[0] = (backEndData_t *) ptr;
	backEndData[0]->polys = (srfPoly_t *) ((char *) ptr + sizeof( *backEndData[0] ));
	backEndData[0]->polyVerts = (polyVert_t *) ((char *) ptr + sizeof( *backEndData[0] ) + sizeof(srfPoly_t) * max_polys);
	if ( r_smp->integer ) {
		ptr = ri.Hunk_Alloc( sizeof( *backEndData[1] ) + sizeof(srfPoly_t) * max_polys + sizeof(polyVert_t) * max_polyverts, h_low);
		backEndData[1] = (backEndData_t *) ptr;
		backEndData[1]->polys = (srfPoly_t *) ((char *) ptr + sizeof( *backEndData[1] ));
		backEndData[1]->polyVerts = (polyVert_t *) ((char *) ptr + sizeof( *backEndData[1] ) + sizeof(srfPoly_t) * max_polys);
	} else {
		backEndData[1] = NULL;
	}
	R_ToggleSmpFrame();

	InitOpenGL();

	R_InitImages();

	R_InitShaders();

	R_InitSkins();

	R_ModelInit();

	R_InitFreeType();


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

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

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

	ri.Printf(PRINT_DEVELOPER, "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("minimize");
	ri.Cmd_RemoveCommand( "modelist" );
	ri.Cmd_RemoveCommand( "shaderstate" );


	if ( tr.registered ) {
		R_SyncRenderThread();
		R_ShutdownCommandBuffers();
		R_DeleteTextures();
	}

	R_DoneFreeType();

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

	tr.registered = qfalse;
}


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

Touch all images to make sure they are resident
=============
*/
void RE_EndRegistration( void ) {
	R_SyncRenderThread();
	if (!ri.Sys_LowPhysicalMemory()) {
		RB_ShowImages();
	}
}


/*
@@@@@@@@@@@@@@@@@@@@@
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;
	}

	// 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;

#ifdef IOQ3ZTM // BONES
	re.JointIndexForName = RE_JointIndexForName;
	re.SetupSkeleton = RE_SetupSkeleton;
	re.SetupPlayerSkeleton = RE_SetupPlayerSkeleton;
	re.MakeSkeletonAbsolute = R_MakeSkeletonAbsolute;
#endif

	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;

	return &re;
}
