* Copied ioq3 src to trunk

1 files changed, 2570 insertions, 0 deletions

diff --git a/src/renderer/tr_image.c b/src/renderer/tr_image.c
new file mode 100644
index 00000000..15d6c7ec
--- /dev/null
+++ b/src/renderer/tr_image.c
@@ -0,0 +1,2570 @@
+/*
+===========================================================================
+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_image.c
+#include "tr_local.h"
+
+/*
+ * Include file for users of JPEG library.
+ * You will need to have included system headers that define at least
+ * the typedefs FILE and size_t before you can include jpeglib.h.
+ * (stdio.h is sufficient on ANSI-conforming systems.)
+ * You may also wish to include "jerror.h".
+ */
+
+#define JPEG_INTERNALS
+#include "../jpeg-6/jpeglib.h"
+
+
+static void LoadBMP( const char *name, byte **pic, int *width, int *height );
+static void LoadTGA( const char *name, byte **pic, int *width, int *height );
+static void LoadJPG( const char *name, byte **pic, int *width, int *height );
+
+static byte			 s_intensitytable[256];
+static unsigned char s_gammatable[256];
+
+int		gl_filter_min = GL_LINEAR_MIPMAP_NEAREST;
+int		gl_filter_max = GL_LINEAR;
+
+#define FILE_HASH_SIZE		1024
+static	image_t*		hashTable[FILE_HASH_SIZE];
+
+/*
+** R_GammaCorrect
+*/
+void R_GammaCorrect( byte *buffer, int bufSize ) {
+	int i;
+
+	for ( i = 0; i < bufSize; i++ ) {
+		buffer[i] = s_gammatable[buffer[i]];
+	}
+}
+
+typedef struct {
+	char *name;
+	int	minimize, maximize;
+} textureMode_t;
+
+textureMode_t modes[] = {
+	{"GL_NEAREST", GL_NEAREST, GL_NEAREST},
+	{"GL_LINEAR", GL_LINEAR, GL_LINEAR},
+	{"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
+	{"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
+	{"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
+	{"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
+};
+
+/*
+================
+return a hash value for the filename
+================
+*/
+static long generateHashValue( const char *fname ) {
+	int		i;
+	long	hash;
+	char	letter;
+
+	hash = 0;
+	i = 0;
+	while (fname[i] != '\0') {
+		letter = tolower(fname[i]);
+		if (letter =='.') break;				// don't include extension
+		if (letter =='\\') letter = '/';		// damn path names
+		hash+=(long)(letter)*(i+119);
+		i++;
+	}
+	hash &= (FILE_HASH_SIZE-1);
+	return hash;
+}
+
+/*
+===============
+GL_TextureMode
+===============
+*/
+void GL_TextureMode( const char *string ) {
+	int		i;
+	image_t	*glt;
+
+	for ( i=0 ; i< 6 ; i++ ) {
+		if ( !Q_stricmp( modes[i].name, string ) ) {
+			break;
+		}
+	}
+
+	// hack to prevent trilinear from being set on voodoo,
+	// because their driver freaks...
+	if ( i == 5 && glConfig.hardwareType == GLHW_3DFX_2D3D ) {
+		ri.Printf( PRINT_ALL, "Refusing to set trilinear on a voodoo.\n" );
+		i = 3;
+	}
+
+
+	if ( i == 6 ) {
+		ri.Printf (PRINT_ALL, "bad filter name\n");
+		return;
+	}
+
+	gl_filter_min = modes[i].minimize;
+	gl_filter_max = modes[i].maximize;
+
+	// change all the existing mipmap texture objects
+	for ( i = 0 ; i < tr.numImages ; i++ ) {
+		glt = tr.images[ i ];
+		if ( glt->mipmap ) {
+			GL_Bind (glt);
+			qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
+			qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
+		}
+	}
+}
+
+/*
+===============
+R_SumOfUsedImages
+===============
+*/
+int R_SumOfUsedImages( void ) {
+	int	total;
+	int i;
+
+	total = 0;
+	for ( i = 0; i < tr.numImages; i++ ) {
+		if ( tr.images[i]->frameUsed == tr.frameCount ) {
+			total += tr.images[i]->uploadWidth * tr.images[i]->uploadHeight;
+		}
+	}
+
+	return total;
+}
+
+/*
+===============
+R_ImageList_f
+===============
+*/
+void R_ImageList_f( void ) {
+	int		i;
+	image_t	*image;
+	int		texels;
+	const char *yesno[] = {
+		"no ", "yes"
+	};
+
+	ri.Printf (PRINT_ALL, "\n      -w-- -h-- -mm- -TMU- -if-- wrap --name-------\n");
+	texels = 0;
+
+	for ( i = 0 ; i < tr.numImages ; i++ ) {
+		image = tr.images[ i ];
+
+		texels += image->uploadWidth*image->uploadHeight;
+		ri.Printf (PRINT_ALL,  "%4i: %4i %4i  %s   %d   ",
+			i, image->uploadWidth, image->uploadHeight, yesno[image->mipmap], image->TMU );
+		switch ( image->internalFormat ) {
+		case 1:
+			ri.Printf( PRINT_ALL, "I    " );
+			break;
+		case 2:
+			ri.Printf( PRINT_ALL, "IA   " );
+			break;
+		case 3:
+			ri.Printf( PRINT_ALL, "RGB  " );
+			break;
+		case 4:
+			ri.Printf( PRINT_ALL, "RGBA " );
+			break;
+		case GL_RGBA8:
+			ri.Printf( PRINT_ALL, "RGBA8" );
+			break;
+		case GL_RGB8:
+			ri.Printf( PRINT_ALL, "RGB8" );
+			break;
+		case GL_RGB4_S3TC:
+			ri.Printf( PRINT_ALL, "S3TC " );
+			break;
+		case GL_RGBA4:
+			ri.Printf( PRINT_ALL, "RGBA4" );
+			break;
+		case GL_RGB5:
+			ri.Printf( PRINT_ALL, "RGB5 " );
+			break;
+		default:
+			ri.Printf( PRINT_ALL, "???? " );
+		}
+
+		switch ( image->wrapClampMode ) {
+		case GL_REPEAT:
+			ri.Printf( PRINT_ALL, "rept " );
+			break;
+		case GL_CLAMP:
+			ri.Printf( PRINT_ALL, "clmp " );
+			break;
+		default:
+			ri.Printf( PRINT_ALL, "%4i ", image->wrapClampMode );
+			break;
+		}
+		
+		ri.Printf( PRINT_ALL, " %s\n", image->imgName );
+	}
+	ri.Printf (PRINT_ALL, " ---------\n");
+	ri.Printf (PRINT_ALL, " %i total texels (not including mipmaps)\n", texels);
+	ri.Printf (PRINT_ALL, " %i total images\n\n", tr.numImages );
+}
+
+//=======================================================================
+
+/*
+================
+ResampleTexture
+
+Used to resample images in a more general than quartering fashion.
+
+This will only be filtered properly if the resampled size
+is greater than half the original size.
+
+If a larger shrinking is needed, use the mipmap function 
+before or after.
+================
+*/
+static void ResampleTexture( unsigned *in, int inwidth, int inheight, unsigned *out,  
+							int outwidth, int outheight ) {
+	int		i, j;
+	unsigned	*inrow, *inrow2;
+	unsigned	frac, fracstep;
+	unsigned	p1[2048], p2[2048];
+	byte		*pix1, *pix2, *pix3, *pix4;
+
+	if (outwidth>2048)
+		ri.Error(ERR_DROP, "ResampleTexture: max width");
+								
+	fracstep = inwidth*0x10000/outwidth;
+
+	frac = fracstep>>2;
+	for ( i=0 ; i<outwidth ; i++ ) {
+		p1[i] = 4*(frac>>16);
+		frac += fracstep;
+	}
+	frac = 3*(fracstep>>2);
+	for ( i=0 ; i<outwidth ; i++ ) {
+		p2[i] = 4*(frac>>16);
+		frac += fracstep;
+	}
+
+	for (i=0 ; i<outheight ; i++, out += outwidth) {
+		inrow = in + inwidth*(int)((i+0.25)*inheight/outheight);
+		inrow2 = in + inwidth*(int)((i+0.75)*inheight/outheight);
+		frac = fracstep >> 1;
+		for (j=0 ; j<outwidth ; j++) {
+			pix1 = (byte *)inrow + p1[j];
+			pix2 = (byte *)inrow + p2[j];
+			pix3 = (byte *)inrow2 + p1[j];
+			pix4 = (byte *)inrow2 + p2[j];
+			((byte *)(out+j))[0] = (pix1[0] + pix2[0] + pix3[0] + pix4[0])>>2;
+			((byte *)(out+j))[1] = (pix1[1] + pix2[1] + pix3[1] + pix4[1])>>2;
+			((byte *)(out+j))[2] = (pix1[2] + pix2[2] + pix3[2] + pix4[2])>>2;
+			((byte *)(out+j))[3] = (pix1[3] + pix2[3] + pix3[3] + pix4[3])>>2;
+		}
+	}
+}
+
+/*
+================
+R_LightScaleTexture
+
+Scale up the pixel values in a texture to increase the
+lighting range
+================
+*/
+void R_LightScaleTexture (unsigned *in, int inwidth, int inheight, qboolean only_gamma )
+{
+	if ( only_gamma )
+	{
+		if ( !glConfig.deviceSupportsGamma )
+		{
+			int		i, c;
+			byte	*p;
+
+			p = (byte *)in;
+
+			c = inwidth*inheight;
+			for (i=0 ; i<c ; i++, p+=4)
+			{
+				p[0] = s_gammatable[p[0]];
+				p[1] = s_gammatable[p[1]];
+				p[2] = s_gammatable[p[2]];
+			}
+		}
+	}
+	else
+	{
+		int		i, c;
+		byte	*p;
+
+		p = (byte *)in;
+
+		c = inwidth*inheight;
+
+		if ( glConfig.deviceSupportsGamma )
+		{
+			for (i=0 ; i<c ; i++, p+=4)
+			{
+				p[0] = s_intensitytable[p[0]];
+				p[1] = s_intensitytable[p[1]];
+				p[2] = s_intensitytable[p[2]];
+			}
+		}
+		else
+		{
+			for (i=0 ; i<c ; i++, p+=4)
+			{
+				p[0] = s_gammatable[s_intensitytable[p[0]]];
+				p[1] = s_gammatable[s_intensitytable[p[1]]];
+				p[2] = s_gammatable[s_intensitytable[p[2]]];
+			}
+		}
+	}
+}
+
+
+/*
+================
+R_MipMap2
+
+Operates in place, quartering the size of the texture
+Proper linear filter
+================
+*/
+static void R_MipMap2( unsigned *in, int inWidth, int inHeight ) {
+	int			i, j, k;
+	byte		*outpix;
+	int			inWidthMask, inHeightMask;
+	int			total;
+	int			outWidth, outHeight;
+	unsigned	*temp;
+
+	outWidth = inWidth >> 1;
+	outHeight = inHeight >> 1;
+	temp = ri.Hunk_AllocateTempMemory( outWidth * outHeight * 4 );
+
+	inWidthMask = inWidth - 1;
+	inHeightMask = inHeight - 1;
+
+	for ( i = 0 ; i < outHeight ; i++ ) {
+		for ( j = 0 ; j < outWidth ; j++ ) {
+			outpix = (byte *) ( temp + i * outWidth + j );
+			for ( k = 0 ; k < 4 ; k++ ) {
+				total = 
+					1 * ((byte *)&in[ ((i*2-1)&inHeightMask)*inWidth + ((j*2-1)&inWidthMask) ])[k] +
+					2 * ((byte *)&in[ ((i*2-1)&inHeightMask)*inWidth + ((j*2)&inWidthMask) ])[k] +
+					2 * ((byte *)&in[ ((i*2-1)&inHeightMask)*inWidth + ((j*2+1)&inWidthMask) ])[k] +
+					1 * ((byte *)&in[ ((i*2-1)&inHeightMask)*inWidth + ((j*2+2)&inWidthMask) ])[k] +
+
+					2 * ((byte *)&in[ ((i*2)&inHeightMask)*inWidth + ((j*2-1)&inWidthMask) ])[k] +
+					4 * ((byte *)&in[ ((i*2)&inHeightMask)*inWidth + ((j*2)&inWidthMask) ])[k] +
+					4 * ((byte *)&in[ ((i*2)&inHeightMask)*inWidth + ((j*2+1)&inWidthMask) ])[k] +
+					2 * ((byte *)&in[ ((i*2)&inHeightMask)*inWidth + ((j*2+2)&inWidthMask) ])[k] +
+
+					2 * ((byte *)&in[ ((i*2+1)&inHeightMask)*inWidth + ((j*2-1)&inWidthMask) ])[k] +
+					4 * ((byte *)&in[ ((i*2+1)&inHeightMask)*inWidth + ((j*2)&inWidthMask) ])[k] +
+					4 * ((byte *)&in[ ((i*2+1)&inHeightMask)*inWidth + ((j*2+1)&inWidthMask) ])[k] +
+					2 * ((byte *)&in[ ((i*2+1)&inHeightMask)*inWidth + ((j*2+2)&inWidthMask) ])[k] +
+
+					1 * ((byte *)&in[ ((i*2+2)&inHeightMask)*inWidth + ((j*2-1)&inWidthMask) ])[k] +
+					2 * ((byte *)&in[ ((i*2+2)&inHeightMask)*inWidth + ((j*2)&inWidthMask) ])[k] +
+					2 * ((byte *)&in[ ((i*2+2)&inHeightMask)*inWidth + ((j*2+1)&inWidthMask) ])[k] +
+					1 * ((byte *)&in[ ((i*2+2)&inHeightMask)*inWidth + ((j*2+2)&inWidthMask) ])[k];
+				outpix[k] = total / 36;
+			}
+		}
+	}
+
+	Com_Memcpy( in, temp, outWidth * outHeight * 4 );
+	ri.Hunk_FreeTempMemory( temp );
+}
+
+/*
+================
+R_MipMap
+
+Operates in place, quartering the size of the texture
+================
+*/
+static void R_MipMap (byte *in, int width, int height) {
+	int		i, j;
+	byte	*out;
+	int		row;
+
+	if ( !r_simpleMipMaps->integer ) {
+		R_MipMap2( (unsigned *)in, width, height );
+		return;
+	}
+
+	if ( width == 1 && height == 1 ) {
+		return;
+	}
+
+	row = width * 4;
+	out = in;
+	width >>= 1;
+	height >>= 1;
+
+	if ( width == 0 || height == 0 ) {
+		width += height;	// get largest
+		for (i=0 ; i<width ; i++, out+=4, in+=8 ) {
+			out[0] = ( in[0] + in[4] )>>1;
+			out[1] = ( in[1] + in[5] )>>1;
+			out[2] = ( in[2] + in[6] )>>1;
+			out[3] = ( in[3] + in[7] )>>1;
+		}
+		return;
+	}
+
+	for (i=0 ; i<height ; i++, in+=row) {
+		for (j=0 ; j<width ; j++, out+=4, in+=8) {
+			out[0] = (in[0] + in[4] + in[row+0] + in[row+4])>>2;
+			out[1] = (in[1] + in[5] + in[row+1] + in[row+5])>>2;
+			out[2] = (in[2] + in[6] + in[row+2] + in[row+6])>>2;
+			out[3] = (in[3] + in[7] + in[row+3] + in[row+7])>>2;
+		}
+	}
+}
+
+
+/*
+==================
+R_BlendOverTexture
+
+Apply a color blend over a set of pixels
+==================
+*/
+static void R_BlendOverTexture( byte *data, int pixelCount, byte blend[4] ) {
+	int		i;
+	int		inverseAlpha;
+	int		premult[3];
+
+	inverseAlpha = 255 - blend[3];
+	premult[0] = blend[0] * blend[3];
+	premult[1] = blend[1] * blend[3];
+	premult[2] = blend[2] * blend[3];
+
+	for ( i = 0 ; i < pixelCount ; i++, data+=4 ) {
+		data[0] = ( data[0] * inverseAlpha + premult[0] ) >> 9;
+		data[1] = ( data[1] * inverseAlpha + premult[1] ) >> 9;
+		data[2] = ( data[2] * inverseAlpha + premult[2] ) >> 9;
+	}
+}
+
+byte	mipBlendColors[16][4] = {
+	{0,0,0,0},
+	{255,0,0,128},
+	{0,255,0,128},
+	{0,0,255,128},
+	{255,0,0,128},
+	{0,255,0,128},
+	{0,0,255,128},
+	{255,0,0,128},
+	{0,255,0,128},
+	{0,0,255,128},
+	{255,0,0,128},
+	{0,255,0,128},
+	{0,0,255,128},
+	{255,0,0,128},
+	{0,255,0,128},
+	{0,0,255,128},
+};
+
+
+/*
+===============
+Upload32
+
+===============
+*/
+extern qboolean charSet;
+static void Upload32( unsigned *data, 
+						  int width, int height, 
+						  qboolean mipmap, 
+						  qboolean picmip, 
+							qboolean lightMap,
+						  int *format, 
+						  int *pUploadWidth, int *pUploadHeight )
+{
+	int			samples;
+	unsigned	*scaledBuffer = NULL;
+	unsigned	*resampledBuffer = NULL;
+	int			scaled_width, scaled_height;
+	int			i, c;
+	byte		*scan;
+	GLenum		internalFormat = GL_RGB;
+	float		rMax = 0, gMax = 0, bMax = 0;
+
+	//
+	// convert to exact power of 2 sizes
+	//
+	for (scaled_width = 1 ; scaled_width < width ; scaled_width<<=1)
+		;
+	for (scaled_height = 1 ; scaled_height < height ; scaled_height<<=1)
+		;
+	if ( r_roundImagesDown->integer && scaled_width > width )
+		scaled_width >>= 1;
+	if ( r_roundImagesDown->integer && scaled_height > height )
+		scaled_height >>= 1;
+
+	if ( scaled_width != width || scaled_height != height ) {
+		resampledBuffer = ri.Hunk_AllocateTempMemory( scaled_width * scaled_height * 4 );
+		ResampleTexture (data, width, height, resampledBuffer, scaled_width, scaled_height);
+		data = resampledBuffer;
+		width = scaled_width;
+		height = scaled_height;
+	}
+
+	//
+	// perform optional picmip operation
+	//
+	if ( picmip ) {
+		scaled_width >>= r_picmip->integer;
+		scaled_height >>= r_picmip->integer;
+	}
+
+	//
+	// clamp to minimum size
+	//
+	if (scaled_width < 1) {
+		scaled_width = 1;
+	}
+	if (scaled_height < 1) {
+		scaled_height = 1;
+	}
+
+	//
+	// clamp to the current upper OpenGL limit
+	// scale both axis down equally so we don't have to
+	// deal with a half mip resampling
+	//
+	while ( scaled_width > glConfig.maxTextureSize
+		|| scaled_height > glConfig.maxTextureSize ) {
+		scaled_width >>= 1;
+		scaled_height >>= 1;
+	}
+
+	scaledBuffer = ri.Hunk_AllocateTempMemory( sizeof( unsigned ) * scaled_width * scaled_height );
+
+	//
+	// scan the texture for each channel's max values
+	// and verify if the alpha channel is being used or not
+	//
+	c = width*height;
+	scan = ((byte *)data);
+	samples = 3;
+	if (!lightMap) {
+		for ( i = 0; i < c; i++ )
+		{
+			if ( scan[i*4+0] > rMax )
+			{
+				rMax = scan[i*4+0];
+			}
+			if ( scan[i*4+1] > gMax )
+			{
+				gMax = scan[i*4+1];
+			}
+			if ( scan[i*4+2] > bMax )
+			{
+				bMax = scan[i*4+2];
+			}
+			if ( scan[i*4 + 3] != 255 ) 
+			{
+				samples = 4;
+				break;
+			}
+		}
+		// select proper internal format
+		if ( samples == 3 )
+		{
+			if ( glConfig.textureCompression == TC_S3TC )
+			{
+				internalFormat = GL_RGB4_S3TC;
+			}
+			else if ( r_texturebits->integer == 16 )
+			{
+				internalFormat = GL_RGB5;
+			}
+			else if ( r_texturebits->integer == 32 )
+			{
+				internalFormat = GL_RGB8;
+			}
+			else
+			{
+				internalFormat = 3;
+			}
+		}
+		else if ( samples == 4 )
+		{
+			if ( r_texturebits->integer == 16 )
+			{
+				internalFormat = GL_RGBA4;
+			}
+			else if ( r_texturebits->integer == 32 )
+			{
+				internalFormat = GL_RGBA8;
+			}
+			else
+			{
+				internalFormat = 4;
+			}
+		}
+	} else {
+		internalFormat = 3;
+	}
+	// copy or resample data as appropriate for first MIP level
+	if ( ( scaled_width == width ) && 
+		( scaled_height == height ) ) {
+		if (!mipmap)
+		{
+			qglTexImage2D (GL_TEXTURE_2D, 0, internalFormat, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
+			*pUploadWidth = scaled_width;
+			*pUploadHeight = scaled_height;
+			*format = internalFormat;
+
+			goto done;
+		}
+		Com_Memcpy (scaledBuffer, data, width*height*4);
+	}
+	else
+	{
+		// use the normal mip-mapping function to go down from here
+		while ( width > scaled_width || height > scaled_height ) {
+			R_MipMap( (byte *)data, width, height );
+			width >>= 1;
+			height >>= 1;
+			if ( width < 1 ) {
+				width = 1;
+			}
+			if ( height < 1 ) {
+				height = 1;
+			}
+		}
+		Com_Memcpy( scaledBuffer, data, width * height * 4 );
+	}
+
+	R_LightScaleTexture (scaledBuffer, scaled_width, scaled_height, !mipmap );
+
+	*pUploadWidth = scaled_width;
+	*pUploadHeight = scaled_height;
+	*format = internalFormat;
+
+	qglTexImage2D (GL_TEXTURE_2D, 0, internalFormat, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaledBuffer );
+
+	if (mipmap)
+	{
+		int		miplevel;
+
+		miplevel = 0;
+		while (scaled_width > 1 || scaled_height > 1)
+		{
+			R_MipMap( (byte *)scaledBuffer, scaled_width, scaled_height );
+			scaled_width >>= 1;
+			scaled_height >>= 1;
+			if (scaled_width < 1)
+				scaled_width = 1;
+			if (scaled_height < 1)
+				scaled_height = 1;
+			miplevel++;
+
+			if ( r_colorMipLevels->integer ) {
+				R_BlendOverTexture( (byte *)scaledBuffer, scaled_width * scaled_height, mipBlendColors[miplevel] );
+			}
+
+			qglTexImage2D (GL_TEXTURE_2D, miplevel, internalFormat, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaledBuffer );
+		}
+	}
+done:
+
+	if (mipmap)
+	{
+		qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min);
+		qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max);
+	}
+	else
+	{
+		qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+		qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+	}
+
+	GL_CheckErrors();
+
+	if ( scaledBuffer != 0 )
+		ri.Hunk_FreeTempMemory( scaledBuffer );
+	if ( resampledBuffer != 0 )
+		ri.Hunk_FreeTempMemory( resampledBuffer );
+}
+
+
+/*
+================
+R_CreateImage
+
+This is the only way any image_t are created
+================
+*/
+image_t *R_CreateImage( const char *name, const byte *pic, int width, int height, 
+					   qboolean mipmap, qboolean allowPicmip, int glWrapClampMode ) {
+	image_t		*image;
+	qboolean	isLightmap = qfalse;
+	long		hash;
+
+	if (strlen(name) >= MAX_QPATH ) {
+		ri.Error (ERR_DROP, "R_CreateImage: \"%s\" is too long\n", name);
+	}
+	if ( !strncmp( name, "*lightmap", 9 ) ) {
+		isLightmap = qtrue;
+	}
+
+	if ( tr.numImages == MAX_DRAWIMAGES ) {
+		ri.Error( ERR_DROP, "R_CreateImage: MAX_DRAWIMAGES hit\n");
+	}
+
+	image = tr.images[tr.numImages] = ri.Hunk_Alloc( sizeof( image_t ), h_low );
+	image->texnum = 1024 + tr.numImages;
+	tr.numImages++;
+
+	image->mipmap = mipmap;
+	image->allowPicmip = allowPicmip;
+
+	strcpy (image->imgName, name);
+
+	image->width = width;
+	image->height = height;
+	image->wrapClampMode = glWrapClampMode;
+
+	// lightmaps are always allocated on TMU 1
+	if ( qglActiveTextureARB && isLightmap ) {
+		image->TMU = 1;
+	} else {
+		image->TMU = 0;
+	}
+
+	if ( qglActiveTextureARB ) {
+		GL_SelectTexture( image->TMU );
+	}
+
+	GL_Bind(image);
+
+	Upload32( (unsigned *)pic, image->width, image->height, 
+								image->mipmap,
+								allowPicmip,
+								isLightmap,
+								&image->internalFormat,
+								&image->uploadWidth,
+								&image->uploadHeight );
+
+	qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, glWrapClampMode );
+	qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, glWrapClampMode );
+
+	qglBindTexture( GL_TEXTURE_2D, 0 );
+
+	if ( image->TMU == 1 ) {
+		GL_SelectTexture( 0 );
+	}
+
+	hash = generateHashValue(name);
+	image->next = hashTable[hash];
+	hashTable[hash] = image;
+
+	return image;
+}
+
+
+/*
+=========================================================
+
+BMP LOADING
+
+=========================================================
+*/
+typedef struct
+{
+	char id[2];
+	unsigned long fileSize;
+	unsigned long reserved0;
+	unsigned long bitmapDataOffset;
+	unsigned long bitmapHeaderSize;
+	unsigned long width;
+	unsigned long height;
+	unsigned short planes;
+	unsigned short bitsPerPixel;
+	unsigned long compression;
+	unsigned long bitmapDataSize;
+	unsigned long hRes;
+	unsigned long vRes;
+	unsigned long colors;
+	unsigned long importantColors;
+	unsigned char palette[256][4];
+} BMPHeader_t;
+
+static void LoadBMP( const char *name, byte **pic, int *width, int *height )
+{
+	int		columns, rows;
+	unsigned	numPixels;
+	byte	*pixbuf;
+	int		row, column;
+	byte	*buf_p;
+	byte	*buffer;
+	int		length;
+	BMPHeader_t bmpHeader;
+	byte		*bmpRGBA;
+
+	*pic = NULL;
+
+	//
+	// load the file
+	//
+	length = ri.FS_ReadFile( ( char * ) name, (void **)&buffer);
+	if (!buffer) {
+		return;
+	}
+
+	buf_p = buffer;
+
+	bmpHeader.id[0] = *buf_p++;
+	bmpHeader.id[1] = *buf_p++;
+	bmpHeader.fileSize = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+	bmpHeader.reserved0 = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+	bmpHeader.bitmapDataOffset = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+	bmpHeader.bitmapHeaderSize = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+	bmpHeader.width = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+	bmpHeader.height = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+	bmpHeader.planes = LittleShort( * ( short * ) buf_p );
+	buf_p += 2;
+	bmpHeader.bitsPerPixel = LittleShort( * ( short * ) buf_p );
+	buf_p += 2;
+	bmpHeader.compression = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+	bmpHeader.bitmapDataSize = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+	bmpHeader.hRes = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+	bmpHeader.vRes = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+	bmpHeader.colors = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+	bmpHeader.importantColors = LittleLong( * ( long * ) buf_p );
+	buf_p += 4;
+
+	Com_Memcpy( bmpHeader.palette, buf_p, sizeof( bmpHeader.palette ) );
+
+	if ( bmpHeader.bitsPerPixel == 8 )
+		buf_p += 1024;
+
+	if ( bmpHeader.id[0] != 'B' && bmpHeader.id[1] != 'M' ) 
+	{
+		ri.Error( ERR_DROP, "LoadBMP: only Windows-style BMP files supported (%s)\n", name );
+	}
+	if ( bmpHeader.fileSize != length )
+	{
+		ri.Error( ERR_DROP, "LoadBMP: header size does not match file size (%d vs. %d) (%s)\n", bmpHeader.fileSize, length, name );
+	}
+	if ( bmpHeader.compression != 0 )
+	{
+		ri.Error( ERR_DROP, "LoadBMP: only uncompressed BMP files supported (%s)\n", name );
+	}
+	if ( bmpHeader.bitsPerPixel < 8 )
+	{
+		ri.Error( ERR_DROP, "LoadBMP: monochrome and 4-bit BMP files not supported (%s)\n", name );
+	}
+
+	columns = bmpHeader.width;
+	rows = bmpHeader.height;
+	if ( rows < 0 )
+		rows = -rows;
+	numPixels = columns * rows;
+
+	if(columns <= 0 || !rows || numPixels > 0x1FFFFFFF // 4*1FFFFFFF == 0x7FFFFFFC < 0x7FFFFFFF
+	    || ((numPixels * 4) / columns) / 4 != rows)
+	{
+	  ri.Error (ERR_DROP, "LoadBMP: %s has an invalid image size\n", name);
+	}
+
+	if ( width ) 
+		*width = columns;
+	if ( height )
+		*height = rows;
+
+	bmpRGBA = ri.Malloc( numPixels * 4 );
+	*pic = bmpRGBA;
+
+
+	for ( row = rows-1; row >= 0; row-- )
+	{
+		pixbuf = bmpRGBA + row*columns*4;
+
+		for ( column = 0; column < columns; column++ )
+		{
+			unsigned char red, green, blue, alpha;
+			int palIndex;
+			unsigned short shortPixel;
+
+			switch ( bmpHeader.bitsPerPixel )
+			{
+			case 8:
+				palIndex = *buf_p++;
+				*pixbuf++ = bmpHeader.palette[palIndex][2];
+				*pixbuf++ = bmpHeader.palette[palIndex][1];
+				*pixbuf++ = bmpHeader.palette[palIndex][0];
+				*pixbuf++ = 0xff;
+				break;
+			case 16:
+				shortPixel = * ( unsigned short * ) pixbuf;
+				pixbuf += 2;
+				*pixbuf++ = ( shortPixel & ( 31 << 10 ) ) >> 7;
+				*pixbuf++ = ( shortPixel & ( 31 << 5 ) ) >> 2;
+				*pixbuf++ = ( shortPixel & ( 31 ) ) << 3;
+				*pixbuf++ = 0xff;
+				break;
+
+			case 24:
+				blue = *buf_p++;
+				green = *buf_p++;
+				red = *buf_p++;
+				*pixbuf++ = red;
+				*pixbuf++ = green;
+				*pixbuf++ = blue;
+				*pixbuf++ = 255;
+				break;
+			case 32:
+				blue = *buf_p++;
+				green = *buf_p++;
+				red = *buf_p++;
+				alpha = *buf_p++;
+				*pixbuf++ = red;
+				*pixbuf++ = green;
+				*pixbuf++ = blue;
+				*pixbuf++ = alpha;
+				break;
+			default:
+				ri.Error( ERR_DROP, "LoadBMP: illegal pixel_size '%d' in file '%s'\n", bmpHeader.bitsPerPixel, name );
+				break;
+			}
+		}
+	}
+
+	ri.FS_FreeFile( buffer );
+
+}
+
+
+/*
+=================================================================
+
+PCX LOADING
+
+=================================================================
+*/
+
+
+/*
+==============
+LoadPCX
+==============
+*/
+static void LoadPCX ( const char *filename, byte **pic, byte **palette, int *width, int *height)
+{
+	byte	*raw;
+	pcx_t	*pcx;
+	int		x, y;
+	int		len;
+	int		dataByte, runLength;
+	byte	*out, *pix;
+	unsigned		xmax, ymax;
+
+	*pic = NULL;
+	*palette = NULL;
+
+	//
+	// load the file
+	//
+	len = ri.FS_ReadFile( ( char * ) filename, (void **)&raw);
+	if (!raw) {
+		return;
+	}
+
+	//
+	// parse the PCX file
+	//
+	pcx = (pcx_t *)raw;
+	raw = &pcx->data;
+
+  	xmax = LittleShort(pcx->xmax);
+    ymax = LittleShort(pcx->ymax);
+
+	if (pcx->manufacturer != 0x0a
+		|| pcx->version != 5
+		|| pcx->encoding != 1
+		|| pcx->bits_per_pixel != 8
+		|| xmax >= 1024
+		|| ymax >= 1024)
+	{
+		ri.Printf (PRINT_ALL, "Bad pcx file %s (%i x %i) (%i x %i)\n", filename, xmax+1, ymax+1, pcx->xmax, pcx->ymax);
+		return;
+	}
+
+	out = ri.Malloc ( (ymax+1) * (xmax+1) );
+
+	*pic = out;
+
+	pix = out;
+
+	if (palette)
+	{
+		*palette = ri.Malloc(768);
+		Com_Memcpy (*palette, (byte *)pcx + len - 768, 768);
+	}
+
+	if (width)
+		*width = xmax+1;
+	if (height)
+		*height = ymax+1;
+// FIXME: use bytes_per_line here?
+
+	for (y=0 ; y<=ymax ; y++, pix += xmax+1)
+	{
+		for (x=0 ; x<=xmax ; )
+		{
+			dataByte = *raw++;
+
+			if((dataByte & 0xC0) == 0xC0)
+			{
+				runLength = dataByte & 0x3F;
+				dataByte = *raw++;
+			}
+			else
+				runLength = 1;
+
+			while(runLength-- > 0)
+				pix[x++] = dataByte;
+		}
+
+	}
+
+	if ( raw - (byte *)pcx > len)
+	{
+		ri.Printf (PRINT_DEVELOPER, "PCX file %s was malformed", filename);
+		ri.Free (*pic);
+		*pic = NULL;
+	}
+
+	ri.FS_FreeFile (pcx);
+}
+
+
+/*
+==============
+LoadPCX32
+==============
+*/
+static void LoadPCX32 ( const char *filename, byte **pic, int *width, int *height) {
+	byte	*palette;
+	byte	*pic8;
+	int		i, c, p;
+	byte	*pic32;
+
+	LoadPCX (filename, &pic8, &palette, width, height);
+	if (!pic8) {
+		*pic = NULL;
+		return;
+	}
+
+	// LoadPCX32 ensures width, height < 1024
+	c = (*width) * (*height);
+	pic32 = *pic = ri.Malloc(4 * c );
+	for (i = 0 ; i < c ; i++) {
+		p = pic8[i];
+		pic32[0] = palette[p*3];
+		pic32[1] = palette[p*3 + 1];
+		pic32[2] = palette[p*3 + 2];
+		pic32[3] = 255;
+		pic32 += 4;
+	}
+
+	ri.Free (pic8);
+	ri.Free (palette);
+}
+
+/*
+=========================================================
+
+TARGA LOADING
+
+=========================================================
+*/
+
+/*
+=============
+LoadTGA
+=============
+*/
+static void LoadTGA ( const char *name, byte **pic, int *width, int *height)
+{
+	unsigned	columns, rows, numPixels;
+	byte	*pixbuf;
+	int		row, column;
+	byte	*buf_p;
+	byte	*buffer;
+	TargaHeader	targa_header;
+	byte		*targa_rgba;
+
+	*pic = NULL;
+
+	//
+	// load the file
+	//
+	ri.FS_ReadFile ( ( char * ) name, (void **)&buffer);
+	if (!buffer) {
+		return;
+	}
+
+	buf_p = buffer;
+
+	targa_header.id_length = buf_p[0];
+	targa_header.colormap_type = buf_p[1];
+	targa_header.image_type = buf_p[2];
+	
+	memcpy(&targa_header.colormap_index, &buf_p[3], 2);
+	memcpy(&targa_header.colormap_length, &buf_p[5], 2);
+	targa_header.colormap_size = buf_p[7];
+	memcpy(&targa_header.x_origin, &buf_p[8], 2);
+	memcpy(&targa_header.y_origin, &buf_p[10], 2);
+	memcpy(&targa_header.width, &buf_p[12], 2);
+	memcpy(&targa_header.height, &buf_p[14], 2);
+	targa_header.pixel_size = buf_p[16];
+	targa_header.attributes = buf_p[17];
+
+	targa_header.colormap_index = LittleShort(targa_header.colormap_index);
+	targa_header.colormap_length = LittleShort(targa_header.colormap_length);
+	targa_header.x_origin = LittleShort(targa_header.x_origin);
+	targa_header.y_origin = LittleShort(targa_header.y_origin);
+	targa_header.width = LittleShort(targa_header.width);
+	targa_header.height = LittleShort(targa_header.height);
+
+	buf_p += 18;
+
+	if (targa_header.image_type!=2 
+		&& targa_header.image_type!=10
+		&& targa_header.image_type != 3 ) 
+	{
+		ri.Error (ERR_DROP, "LoadTGA: Only type 2 (RGB), 3 (gray), and 10 (RGB) TGA images supported\n");
+	}
+
+	if ( targa_header.colormap_type != 0 )
+	{
+		ri.Error( ERR_DROP, "LoadTGA: colormaps not supported\n" );
+	}
+
+	if ( ( targa_header.pixel_size != 32 && targa_header.pixel_size != 24 ) && targa_header.image_type != 3 )
+	{
+		ri.Error (ERR_DROP, "LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n");
+	}
+
+	columns = targa_header.width;
+	rows = targa_header.height;
+	numPixels = columns * rows * 4;
+
+	if (width)
+		*width = columns;
+	if (height)
+		*height = rows;
+
+	if(!columns || !rows || numPixels > 0x7FFFFFFF || numPixels / columns / 4 != rows)
+	{
+		ri.Error (ERR_DROP, "LoadTGA: %s has an invalid image size\n", name);
+	}
+
+	targa_rgba = ri.Malloc (numPixels);
+	*pic = targa_rgba;
+
+	if (targa_header.id_length != 0)
+		buf_p += targa_header.id_length;  // skip TARGA image comment
+	
+	if ( targa_header.image_type==2 || targa_header.image_type == 3 )
+	{ 
+		// Uncompressed RGB or gray scale image
+		for(row=rows-1; row>=0; row--) 
+		{
+			pixbuf = targa_rgba + row*columns*4;
+			for(column=0; column<columns; column++) 
+			{
+				unsigned char red,green,blue,alphabyte;
+				switch (targa_header.pixel_size) 
+				{
+					
+				case 8:
+					blue = *buf_p++;
+					green = blue;
+					red = blue;
+					*pixbuf++ = red;
+					*pixbuf++ = green;
+					*pixbuf++ = blue;
+					*pixbuf++ = 255;
+					break;
+
+				case 24:
+					blue = *buf_p++;
+					green = *buf_p++;
+					red = *buf_p++;
+					*pixbuf++ = red;
+					*pixbuf++ = green;
+					*pixbuf++ = blue;
+					*pixbuf++ = 255;
+					break;
+				case 32:
+					blue = *buf_p++;
+					green = *buf_p++;
+					red = *buf_p++;
+					alphabyte = *buf_p++;
+					*pixbuf++ = red;
+					*pixbuf++ = green;
+					*pixbuf++ = blue;
+					*pixbuf++ = alphabyte;
+					break;
+				default:
+					ri.Error( ERR_DROP, "LoadTGA: illegal pixel_size '%d' in file '%s'\n", targa_header.pixel_size, name );
+					break;
+				}
+			}
+		}
+	}
+	else if (targa_header.image_type==10) {   // Runlength encoded RGB images
+		unsigned char red,green,blue,alphabyte,packetHeader,packetSize,j;
+
+		red = 0;
+		green = 0;
+		blue = 0;
+		alphabyte = 0xff;
+
+		for(row=rows-1; row>=0; row--) {
+			pixbuf = targa_rgba + row*columns*4;
+			for(column=0; column<columns; ) {
+				packetHeader= *buf_p++;
+				packetSize = 1 + (packetHeader & 0x7f);
+				if (packetHeader & 0x80) {        // run-length packet
+					switch (targa_header.pixel_size) {
+						case 24:
+								blue = *buf_p++;
+								green = *buf_p++;
+								red = *buf_p++;
+								alphabyte = 255;
+								break;
+						case 32:
+								blue = *buf_p++;
+								green = *buf_p++;
+								red = *buf_p++;
+								alphabyte = *buf_p++;
+								break;
+						default:
+							ri.Error( ERR_DROP, "LoadTGA: illegal pixel_size '%d' in file '%s'\n", targa_header.pixel_size, name );
+							break;
+					}
+	
+					for(j=0;j<packetSize;j++) {
+						*pixbuf++=red;
+						*pixbuf++=green;
+						*pixbuf++=blue;
+						*pixbuf++=alphabyte;
+						column++;
+						if (column==columns) { // run spans across rows
+							column=0;
+							if (row>0)
+								row--;
+							else
+								goto breakOut;
+							pixbuf = targa_rgba + row*columns*4;
+						}
+					}
+				}
+				else {                            // non run-length packet
+					for(j=0;j<packetSize;j++) {
+						switch (targa_header.pixel_size) {
+							case 24:
+									blue = *buf_p++;
+									green = *buf_p++;
+									red = *buf_p++;
+									*pixbuf++ = red;
+									*pixbuf++ = green;
+									*pixbuf++ = blue;
+									*pixbuf++ = 255;
+									break;
+							case 32:
+									blue = *buf_p++;
+									green = *buf_p++;
+									red = *buf_p++;
+									alphabyte = *buf_p++;
+									*pixbuf++ = red;
+									*pixbuf++ = green;
+									*pixbuf++ = blue;
+									*pixbuf++ = alphabyte;
+									break;
+							default:
+								ri.Error( ERR_DROP, "LoadTGA: illegal pixel_size '%d' in file '%s'\n", targa_header.pixel_size, name );
+								break;
+						}
+						column++;
+						if (column==columns) { // pixel packet run spans across rows
+							column=0;
+							if (row>0)
+								row--;
+							else
+								goto breakOut;
+							pixbuf = targa_rgba + row*columns*4;
+						}						
+					}
+				}
+			}
+			breakOut:;
+		}
+	}
+
+#if 0 
+  // TTimo: this is the chunk of code to ensure a behavior that meets TGA specs 
+  // bk0101024 - fix from Leonardo
+  // bit 5 set => top-down
+  if (targa_header.attributes & 0x20) {
+    unsigned char *flip = (unsigned char*)malloc (columns*4);
+    unsigned char *src, *dst;
+
+    for (row = 0; row < rows/2; row++) {
+      src = targa_rgba + row * 4 * columns;
+      dst = targa_rgba + (rows - row - 1) * 4 * columns;
+
+      memcpy (flip, src, columns*4);
+      memcpy (src, dst, columns*4);
+      memcpy (dst, flip, columns*4);
+    }
+    free (flip);
+  }
+#endif
+  // instead we just print a warning
+  if (targa_header.attributes & 0x20) {
+    ri.Printf( PRINT_WARNING, "WARNING: '%s' TGA file header declares top-down image, ignoring\n", name);
+  }
+
+  ri.FS_FreeFile (buffer);
+}
+
+static void LoadJPG( const char *filename, unsigned char **pic, int *width, int *height ) {
+  /* This struct contains the JPEG decompression parameters and pointers to
+   * working space (which is allocated as needed by the JPEG library).
+   */
+  struct jpeg_decompress_struct cinfo = {NULL};
+  /* We use our private extension JPEG error handler.
+   * Note that this struct must live as long as the main JPEG parameter
+   * struct, to avoid dangling-pointer problems.
+   */
+  /* This struct represents a JPEG error handler.  It is declared separately
+   * because applications often want to supply a specialized error handler
+   * (see the second half of this file for an example).  But here we just
+   * take the easy way out and use the standard error handler, which will
+   * print a message on stderr and call exit() if compression fails.
+   * Note that this struct must live as long as the main JPEG parameter
+   * struct, to avoid dangling-pointer problems.
+   */
+  struct jpeg_error_mgr jerr;
+  /* More stuff */
+  JSAMPARRAY buffer;		/* Output row buffer */
+  unsigned row_stride;		/* physical row width in output buffer */
+  unsigned pixelcount, memcount;
+  unsigned char *out;
+  byte	*fbuffer;
+  byte  *buf;
+
+  /* In this example we want to open the input file before doing anything else,
+   * so that the setjmp() error recovery below can assume the file is open.
+   * VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
+   * requires it in order to read binary files.
+   */
+
+  ri.FS_ReadFile ( ( char * ) filename, (void **)&fbuffer);
+  if (!fbuffer) {
+	return;
+  }
+
+  /* Step 1: allocate and initialize JPEG decompression object */
+
+  /* We have to set up the error handler first, in case the initialization
+   * step fails.  (Unlikely, but it could happen if you are out of memory.)
+   * This routine fills in the contents of struct jerr, and returns jerr's
+   * address which we place into the link field in cinfo.
+   */
+  cinfo.err = jpeg_std_error(&jerr);
+
+  /* Now we can initialize the JPEG decompression object. */
+  jpeg_create_decompress(&cinfo);
+
+  /* Step 2: specify data source (eg, a file) */
+
+  jpeg_stdio_src(&cinfo, fbuffer);
+
+  /* Step 3: read file parameters with jpeg_read_header() */
+
+  (void) jpeg_read_header(&cinfo, TRUE);
+  /* We can ignore the return value from jpeg_read_header since
+   *   (a) suspension is not possible with the stdio data source, and
+   *   (b) we passed TRUE to reject a tables-only JPEG file as an error.
+   * See libjpeg.doc for more info.
+   */
+
+  /* Step 4: set parameters for decompression */
+
+  /* In this example, we don't need to change any of the defaults set by
+   * jpeg_read_header(), so we do nothing here.
+   */
+
+  /* Step 5: Start decompressor */
+
+  (void) jpeg_start_decompress(&cinfo);
+  /* We can ignore the return value since suspension is not possible
+   * with the stdio data source.
+   */
+
+  /* We may need to do some setup of our own at this point before reading
+   * the data.  After jpeg_start_decompress() we have the correct scaled
+   * output image dimensions available, as well as the output colormap
+   * if we asked for color quantization.
+   * In this example, we need to make an output work buffer of the right size.
+   */ 
+  /* JSAMPLEs per row in output buffer */
+
+  pixelcount = cinfo.output_width * cinfo.output_height;
+
+  if(!cinfo.output_width || !cinfo.output_height
+      || ((pixelcount * 4) / cinfo.output_width) / 4 != cinfo.output_height
+      || pixelcount > 0x1FFFFFFF || cinfo.output_components > 4) // 4*1FFFFFFF == 0x7FFFFFFC < 0x7FFFFFFF
+  {
+    ri.Error (ERR_DROP, "LoadJPG: %s has an invalid image size: %dx%d*4=%d, components: %d\n", filename,
+		    cinfo.output_width, cinfo.output_height, pixelcount * 4, cinfo.output_components);
+  }
+
+  memcount = pixelcount * 4;
+  row_stride = cinfo.output_width * cinfo.output_components;
+
+  out = ri.Malloc(memcount);
+
+  *width = cinfo.output_width;
+  *height = cinfo.output_height;
+
+  /* Step 6: while (scan lines remain to be read) */
+  /*           jpeg_read_scanlines(...); */
+
+  /* Here we use the library's state variable cinfo.output_scanline as the
+   * loop counter, so that we don't have to keep track ourselves.
+   */
+  while (cinfo.output_scanline < cinfo.output_height) {
+    /* jpeg_read_scanlines expects an array of pointers to scanlines.
+     * Here the array is only one element long, but you could ask for
+     * more than one scanline at a time if that's more convenient.
+     */
+	buf = ((out+(row_stride*cinfo.output_scanline)));
+	buffer = &buf;
+    (void) jpeg_read_scanlines(&cinfo, buffer, 1);
+  }
+  
+  buf = out;
+
+  // If we are processing an 8-bit JPEG (greyscale), we'll have to convert
+  // the greyscale values to RGBA.
+  if(cinfo.output_components == 1)
+  {
+  	int sindex = pixelcount, dindex = memcount;
+	unsigned char greyshade;
+
+	// Only pixelcount number of bytes have been written.
+	// Expand the color values over the rest of the buffer, starting
+	// from the end.
+	do
+	{
+		greyshade = buf[--sindex];
+
+		buf[--dindex] = 255;
+		buf[--dindex] = greyshade;
+		buf[--dindex] = greyshade;
+		buf[--dindex] = greyshade;
+	} while(sindex);
+  }
+  else
+  {
+	// clear all the alphas to 255
+	int	i;
+
+	for ( i = 3 ; i < memcount ; i+=4 )
+	{
+		buf[i] = 255;
+	}
+  }
+
+  *pic = out;
+
+  /* Step 7: Finish decompression */
+
+  (void) jpeg_finish_decompress(&cinfo);
+  /* We can ignore the return value since suspension is not possible
+   * with the stdio data source.
+   */
+
+  /* Step 8: Release JPEG decompression object */
+
+  /* This is an important step since it will release a good deal of memory. */
+  jpeg_destroy_decompress(&cinfo);
+
+  /* After finish_decompress, we can close the input file.
+   * Here we postpone it until after no more JPEG errors are possible,
+   * so as to simplify the setjmp error logic above.  (Actually, I don't
+   * think that jpeg_destroy can do an error exit, but why assume anything...)
+   */
+  ri.FS_FreeFile (fbuffer);
+
+  /* At this point you may want to check to see whether any corrupt-data
+   * warnings occurred (test whether jerr.pub.num_warnings is nonzero).
+   */
+
+  /* And we're done! */
+}
+
+
+/* Expanded data destination object for stdio output */
+
+typedef struct {
+  struct jpeg_destination_mgr pub; /* public fields */
+
+  byte* outfile;		/* target stream */
+  int	size;
+} my_destination_mgr;
+
+typedef my_destination_mgr * my_dest_ptr;
+
+
+/*
+ * Initialize destination --- called by jpeg_start_compress
+ * before any data is actually written.
+ */
+
+void init_destination (j_compress_ptr cinfo)
+{
+  my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
+
+  dest->pub.next_output_byte = dest->outfile;
+  dest->pub.free_in_buffer = dest->size;
+}
+
+
+/*
+ * Empty the output buffer --- called whenever buffer fills up.
+ *
+ * In typical applications, this should write the entire output buffer
+ * (ignoring the current state of next_output_byte & free_in_buffer),
+ * reset the pointer & count to the start of the buffer, and return TRUE
+ * indicating that the buffer has been dumped.
+ *
+ * In applications that need to be able to suspend compression due to output
+ * overrun, a FALSE return indicates that the buffer cannot be emptied now.
+ * In this situation, the compressor will return to its caller (possibly with
+ * an indication that it has not accepted all the supplied scanlines).  The
+ * application should resume compression after it has made more room in the
+ * output buffer.  Note that there are substantial restrictions on the use of
+ * suspension --- see the documentation.
+ *
+ * When suspending, the compressor will back up to a convenient restart point
+ * (typically the start of the current MCU). next_output_byte & free_in_buffer
+ * indicate where the restart point will be if the current call returns FALSE.
+ * Data beyond this point will be regenerated after resumption, so do not
+ * write it out when emptying the buffer externally.
+ */
+
+boolean empty_output_buffer (j_compress_ptr cinfo)
+{
+  return TRUE;
+}
+
+
+/*
+ * Compression initialization.
+ * Before calling this, all parameters and a data destination must be set up.
+ *
+ * We require a write_all_tables parameter as a failsafe check when writing
+ * multiple datastreams from the same compression object.  Since prior runs
+ * will have left all the tables marked sent_table=TRUE, a subsequent run
+ * would emit an abbreviated stream (no tables) by default.  This may be what
+ * is wanted, but for safety's sake it should not be the default behavior:
+ * programmers should have to make a deliberate choice to emit abbreviated
+ * images.  Therefore the documentation and examples should encourage people
+ * to pass write_all_tables=TRUE; then it will take active thought to do the
+ * wrong thing.
+ */
+
+GLOBAL void
+jpeg_start_compress (j_compress_ptr cinfo, boolean write_all_tables)
+{
+  if (cinfo->global_state != CSTATE_START)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  if (write_all_tables)
+    jpeg_suppress_tables(cinfo, FALSE);	/* mark all tables to be written */
+
+  /* (Re)initialize error mgr and destination modules */
+  (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
+  (*cinfo->dest->init_destination) (cinfo);
+  /* Perform master selection of active modules */
+  jinit_compress_master(cinfo);
+  /* Set up for the first pass */
+  (*cinfo->master->prepare_for_pass) (cinfo);
+  /* Ready for application to drive first pass through jpeg_write_scanlines
+   * or jpeg_write_raw_data.
+   */
+  cinfo->next_scanline = 0;
+  cinfo->global_state = (cinfo->raw_data_in ? CSTATE_RAW_OK : CSTATE_SCANNING);
+}
+
+
+/*
+ * Write some scanlines of data to the JPEG compressor.
+ *
+ * The return value will be the number of lines actually written.
+ * This should be less than the supplied num_lines only in case that
+ * the data destination module has requested suspension of the compressor,
+ * or if more than image_height scanlines are passed in.
+ *
+ * Note: we warn about excess calls to jpeg_write_scanlines() since
+ * this likely signals an application programmer error.  However,
+ * excess scanlines passed in the last valid call are *silently* ignored,
+ * so that the application need not adjust num_lines for end-of-image
+ * when using a multiple-scanline buffer.
+ */
+
+GLOBAL JDIMENSION
+jpeg_write_scanlines (j_compress_ptr cinfo, JSAMPARRAY scanlines,
+		      JDIMENSION num_lines)
+{
+  JDIMENSION row_ctr, rows_left;
+
+  if (cinfo->global_state != CSTATE_SCANNING)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  if (cinfo->next_scanline >= cinfo->image_height)
+    WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
+
+  /* Call progress monitor hook if present */
+  if (cinfo->progress != NULL) {
+    cinfo->progress->pass_counter = (long) cinfo->next_scanline;
+    cinfo->progress->pass_limit = (long) cinfo->image_height;
+    (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
+  }
+
+  /* Give master control module another chance if this is first call to
+   * jpeg_write_scanlines.  This lets output of the frame/scan headers be
+   * delayed so that application can write COM, etc, markers between
+   * jpeg_start_compress and jpeg_write_scanlines.
+   */
+  if (cinfo->master->call_pass_startup)
+    (*cinfo->master->pass_startup) (cinfo);
+
+  /* Ignore any extra scanlines at bottom of image. */
+  rows_left = cinfo->image_height - cinfo->next_scanline;
+  if (num_lines > rows_left)
+    num_lines = rows_left;
+
+  row_ctr = 0;
+  (*cinfo->main->process_data) (cinfo, scanlines, &row_ctr, num_lines);
+  cinfo->next_scanline += row_ctr;
+  return row_ctr;
+}
+
+/*
+ * Terminate destination --- called by jpeg_finish_compress
+ * after all data has been written.  Usually needs to flush buffer.
+ *
+ * NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
+ * application must deal with any cleanup that should happen even
+ * for error exit.
+ */
+
+static int hackSize;
+
+void term_destination (j_compress_ptr cinfo)
+{
+  my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
+  size_t datacount = dest->size - dest->pub.free_in_buffer;
+  hackSize = datacount;
+}
+
+
+/*
+ * Prepare for output to a stdio stream.
+ * The caller must have already opened the stream, and is responsible
+ * for closing it after finishing compression.
+ */
+
+void jpegDest (j_compress_ptr cinfo, byte* outfile, int size)
+{
+  my_dest_ptr dest;
+
+  /* The destination object is made permanent so that multiple JPEG images
+   * can be written to the same file without re-executing jpeg_stdio_dest.
+   * This makes it dangerous to use this manager and a different destination
+   * manager serially with the same JPEG object, because their private object
+   * sizes may be different.  Caveat programmer.
+   */
+  if (cinfo->dest == NULL) {	/* first time for this JPEG object? */
+    cinfo->dest = (struct jpeg_destination_mgr *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+				  sizeof(my_destination_mgr));
+  }
+
+  dest = (my_dest_ptr) cinfo->dest;
+  dest->pub.init_destination = init_destination;
+  dest->pub.empty_output_buffer = empty_output_buffer;
+  dest->pub.term_destination = term_destination;
+  dest->outfile = outfile;
+  dest->size = size;
+}
+
+void SaveJPG(char * filename, int quality, int image_width, int image_height, unsigned char *image_buffer) {
+  /* This struct contains the JPEG compression parameters and pointers to
+   * working space (which is allocated as needed by the JPEG library).
+   * It is possible to have several such structures, representing multiple
+   * compression/decompression processes, in existence at once.  We refer
+   * to any one struct (and its associated working data) as a "JPEG object".
+   */
+  struct jpeg_compress_struct cinfo;
+  /* This struct represents a JPEG error handler.  It is declared separately
+   * because applications often want to supply a specialized error handler
+   * (see the second half of this file for an example).  But here we just
+   * take the easy way out and use the standard error handler, which will
+   * print a message on stderr and call exit() if compression fails.
+   * Note that this struct must live as long as the main JPEG parameter
+   * struct, to avoid dangling-pointer problems.
+   */
+  struct jpeg_error_mgr jerr;
+  /* More stuff */
+  JSAMPROW row_pointer[1];	/* pointer to JSAMPLE row[s] */
+  int row_stride;		/* physical row width in image buffer */
+  unsigned char *out;
+
+  /* Step 1: allocate and initialize JPEG compression object */
+
+  /* We have to set up the error handler first, in case the initialization
+   * step fails.  (Unlikely, but it could happen if you are out of memory.)
+   * This routine fills in the contents of struct jerr, and returns jerr's
+   * address which we place into the link field in cinfo.
+   */
+  cinfo.err = jpeg_std_error(&jerr);
+  /* Now we can initialize the JPEG compression object. */
+  jpeg_create_compress(&cinfo);
+
+  /* Step 2: specify data destination (eg, a file) */
+  /* Note: steps 2 and 3 can be done in either order. */
+
+  /* Here we use the library-supplied code to send compressed data to a
+   * stdio stream.  You can also write your own code to do something else.
+   * VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
+   * requires it in order to write binary files.
+   */
+  out = ri.Hunk_AllocateTempMemory(image_width*image_height*4);
+  jpegDest(&cinfo, out, image_width*image_height*4);
+
+  /* Step 3: set parameters for compression */
+
+  /* First we supply a description of the input image.
+   * Four fields of the cinfo struct must be filled in:
+   */
+  cinfo.image_width = image_width; 	/* image width and height, in pixels */
+  cinfo.image_height = image_height;
+  cinfo.input_components = 4;		/* # of color components per pixel */
+  cinfo.in_color_space = JCS_RGB; 	/* colorspace of input image */
+  /* Now use the library's routine to set default compression parameters.
+   * (You must set at least cinfo.in_color_space before calling this,
+   * since the defaults depend on the source color space.)
+   */
+  jpeg_set_defaults(&cinfo);
+  /* Now you can set any non-default parameters you wish to.
+   * Here we just illustrate the use of quality (quantization table) scaling:
+   */
+  jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
+
+  /* Step 4: Start compressor */
+
+  /* TRUE ensures that we will write a complete interchange-JPEG file.
+   * Pass TRUE unless you are very sure of what you're doing.
+   */
+  jpeg_start_compress(&cinfo, TRUE);
+
+  /* Step 5: while (scan lines remain to be written) */
+  /*           jpeg_write_scanlines(...); */
+
+  /* Here we use the library's state variable cinfo.next_scanline as the
+   * loop counter, so that we don't have to keep track ourselves.
+   * To keep things simple, we pass one scanline per call; you can pass
+   * more if you wish, though.
+   */
+  row_stride = image_width * 4;	/* JSAMPLEs per row in image_buffer */
+
+  while (cinfo.next_scanline < cinfo.image_height) {
+    /* jpeg_write_scanlines expects an array of pointers to scanlines.
+     * Here the array is only one element long, but you could pass
+     * more than one scanline at a time if that's more convenient.
+     */
+    row_pointer[0] = & image_buffer[((cinfo.image_height-1)*row_stride)-cinfo.next_scanline * row_stride];
+    (void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
+  }
+
+  /* Step 6: Finish compression */
+
+  jpeg_finish_compress(&cinfo);
+  /* After finish_compress, we can close the output file. */
+  ri.FS_WriteFile( filename, out, hackSize );
+
+  ri.Hunk_FreeTempMemory(out);
+
+  /* Step 7: release JPEG compression object */
+
+  /* This is an important step since it will release a good deal of memory. */
+  jpeg_destroy_compress(&cinfo);
+
+  /* And we're done! */
+}
+
+//===================================================================
+
+/*
+=================
+R_LoadImage
+
+Loads any of the supported image types into a cannonical
+32 bit format.
+=================
+*/
+void R_LoadImage( const char *name, byte **pic, int *width, int *height ) {
+	int		len;
+
+	*pic = NULL;
+	*width = 0;
+	*height = 0;
+
+	len = strlen(name);
+	if (len<5) {
+		return;
+	}
+
+	if ( !Q_stricmp( name+len-4, ".tga" ) ) {
+	  LoadTGA( name, pic, width, height );            // try tga first
+    if (!*pic) {                                    //
+		  char altname[MAX_QPATH];                      // try jpg in place of tga 
+      strcpy( altname, name );                      
+      len = strlen( altname );                  
+      altname[len-3] = 'j';
+      altname[len-2] = 'p';
+      altname[len-1] = 'g';
+			LoadJPG( altname, pic, width, height );
+		}
+  } else if ( !Q_stricmp(name+len-4, ".pcx") ) {
+    LoadPCX32( name, pic, width, height );
+	} else if ( !Q_stricmp( name+len-4, ".bmp" ) ) {
+		LoadBMP( name, pic, width, height );
+	} else if ( !Q_stricmp( name+len-4, ".jpg" ) ) {
+		LoadJPG( name, pic, width, height );
+	}
+}
+
+
+/*
+===============
+R_FindImageFile
+
+Finds or loads the given image.
+Returns NULL if it fails, not a default image.
+==============
+*/
+image_t	*R_FindImageFile( const char *name, qboolean mipmap, qboolean allowPicmip, int glWrapClampMode ) {
+	image_t	*image;
+	int		width, height;
+	byte	*pic;
+	long	hash;
+
+	if (!name) {
+		return NULL;
+	}
+
+	hash = generateHashValue(name);
+
+	//
+	// see if the image is already loaded
+	//
+	for (image=hashTable[hash]; image; image=image->next) {
+		if ( !strcmp( name, image->imgName ) ) {
+			// the white image can be used with any set of parms, but other mismatches are errors
+			if ( strcmp( name, "*white" ) ) {
+				if ( image->mipmap != mipmap ) {
+					ri.Printf( PRINT_DEVELOPER, "WARNING: reused image %s with mixed mipmap parm\n", name );
+				}
+				if ( image->allowPicmip != allowPicmip ) {
+					ri.Printf( PRINT_DEVELOPER, "WARNING: reused image %s with mixed allowPicmip parm\n", name );
+				}
+				if ( image->wrapClampMode != glWrapClampMode ) {
+					ri.Printf( PRINT_ALL, "WARNING: reused image %s with mixed glWrapClampMode parm\n", name );
+				}
+			}
+			return image;
+		}
+	}
+
+	//
+	// load the pic from disk
+	//
+	R_LoadImage( name, &pic, &width, &height );
+	if ( pic == NULL ) {                                    // if we dont get a successful load
+	  char altname[MAX_QPATH];                              // copy the name
+    int len;                                              //  
+    strcpy( altname, name );                              //
+    len = strlen( altname );                              // 
+    altname[len-3] = toupper(altname[len-3]);             // and try upper case extension for unix systems
+    altname[len-2] = toupper(altname[len-2]);             //
+    altname[len-1] = toupper(altname[len-1]);             //
+		ri.Printf( PRINT_ALL, "trying %s...\n", altname );    // 
+	  R_LoadImage( altname, &pic, &width, &height );        //
+    if (pic == NULL) {                                    // if that fails
+      return NULL;                                        // bail
+    }
+	}
+
+	image = R_CreateImage( ( char * ) name, pic, width, height, mipmap, allowPicmip, glWrapClampMode );
+	ri.Free( pic );
+	return image;
+}
+
+
+/*
+================
+R_CreateDlightImage
+================
+*/
+#define	DLIGHT_SIZE	16
+static void R_CreateDlightImage( void ) {
+	int		x,y;
+	byte	data[DLIGHT_SIZE][DLIGHT_SIZE][4];
+	int		b;
+
+	// make a centered inverse-square falloff blob for dynamic lighting
+	for (x=0 ; x<DLIGHT_SIZE ; x++) {
+		for (y=0 ; y<DLIGHT_SIZE ; y++) {
+			float	d;
+
+			d = ( DLIGHT_SIZE/2 - 0.5f - x ) * ( DLIGHT_SIZE/2 - 0.5f - x ) +
+				( DLIGHT_SIZE/2 - 0.5f - y ) * ( DLIGHT_SIZE/2 - 0.5f - y );
+			b = 4000 / d;
+			if (b > 255) {
+				b = 255;
+			} else if ( b < 75 ) {
+				b = 0;
+			}
+			data[y][x][0] = 
+			data[y][x][1] = 
+			data[y][x][2] = b;
+			data[y][x][3] = 255;			
+		}
+	}
+	tr.dlightImage = R_CreateImage("*dlight", (byte *)data, DLIGHT_SIZE, DLIGHT_SIZE, qfalse, qfalse, GL_CLAMP );
+}
+
+
+/*
+=================
+R_InitFogTable
+=================
+*/
+void R_InitFogTable( void ) {
+	int		i;
+	float	d;
+	float	exp;
+	
+	exp = 0.5;
+
+	for ( i = 0 ; i < FOG_TABLE_SIZE ; i++ ) {
+		d = pow ( (float)i/(FOG_TABLE_SIZE-1), exp );
+
+		tr.fogTable[i] = d;
+	}
+}
+
+/*
+================
+R_FogFactor
+
+Returns a 0.0 to 1.0 fog density value
+This is called for each texel of the fog texture on startup
+and for each vertex of transparent shaders in fog dynamically
+================
+*/
+float	R_FogFactor( float s, float t ) {
+	float	d;
+
+	s -= 1.0/512;
+	if ( s < 0 ) {
+		return 0;
+	}
+	if ( t < 1.0/32 ) {
+		return 0;
+	}
+	if ( t < 31.0/32 ) {
+		s *= (t - 1.0f/32.0f) / (30.0f/32.0f);
+	}
+
+	// we need to leave a lot of clamp range
+	s *= 8;
+
+	if ( s > 1.0 ) {
+		s = 1.0;
+	}
+
+	d = tr.fogTable[ (int)(s * (FOG_TABLE_SIZE-1)) ];
+
+	return d;
+}
+
+/*
+================
+R_CreateFogImage
+================
+*/
+#define	FOG_S	256
+#define	FOG_T	32
+static void R_CreateFogImage( void ) {
+	int		x,y;
+	byte	*data;
+	float	g;
+	float	d;
+	float	borderColor[4];
+
+	data = ri.Hunk_AllocateTempMemory( FOG_S * FOG_T * 4 );
+
+	g = 2.0;
+
+	// S is distance, T is depth
+	for (x=0 ; x<FOG_S ; x++) {
+		for (y=0 ; y<FOG_T ; y++) {
+			d = R_FogFactor( ( x + 0.5f ) / FOG_S, ( y + 0.5f ) / FOG_T );
+
+			data[(y*FOG_S+x)*4+0] = 
+			data[(y*FOG_S+x)*4+1] = 
+			data[(y*FOG_S+x)*4+2] = 255;
+			data[(y*FOG_S+x)*4+3] = 255*d;
+		}
+	}
+	// standard openGL clamping doesn't really do what we want -- it includes
+	// the border color at the edges.  OpenGL 1.2 has clamp-to-edge, which does
+	// what we want.
+	tr.fogImage = R_CreateImage("*fog", (byte *)data, FOG_S, FOG_T, qfalse, qfalse, GL_CLAMP );
+	ri.Hunk_FreeTempMemory( data );
+
+	borderColor[0] = 1.0;
+	borderColor[1] = 1.0;
+	borderColor[2] = 1.0;
+	borderColor[3] = 1;
+
+	qglTexParameterfv( GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor );
+}
+
+/*
+==================
+R_CreateDefaultImage
+==================
+*/
+#define	DEFAULT_SIZE	16
+static void R_CreateDefaultImage( void ) {
+	int		x;
+	byte	data[DEFAULT_SIZE][DEFAULT_SIZE][4];
+
+	// the default image will be a box, to allow you to see the mapping coordinates
+	Com_Memset( data, 32, sizeof( data ) );
+	for ( x = 0 ; x < DEFAULT_SIZE ; x++ ) {
+		data[0][x][0] =
+		data[0][x][1] =
+		data[0][x][2] =
+		data[0][x][3] = 255;
+
+		data[x][0][0] =
+		data[x][0][1] =
+		data[x][0][2] =
+		data[x][0][3] = 255;
+
+		data[DEFAULT_SIZE-1][x][0] =
+		data[DEFAULT_SIZE-1][x][1] =
+		data[DEFAULT_SIZE-1][x][2] =
+		data[DEFAULT_SIZE-1][x][3] = 255;
+
+		data[x][DEFAULT_SIZE-1][0] =
+		data[x][DEFAULT_SIZE-1][1] =
+		data[x][DEFAULT_SIZE-1][2] =
+		data[x][DEFAULT_SIZE-1][3] = 255;
+	}
+	tr.defaultImage = R_CreateImage("*default", (byte *)data, DEFAULT_SIZE, DEFAULT_SIZE, qtrue, qfalse, GL_REPEAT );
+}
+
+/*
+==================
+R_CreateBuiltinImages
+==================
+*/
+void R_CreateBuiltinImages( void ) {
+	int		x,y;
+	byte	data[DEFAULT_SIZE][DEFAULT_SIZE][4];
+
+	R_CreateDefaultImage();
+
+	// we use a solid white image instead of disabling texturing
+	Com_Memset( data, 255, sizeof( data ) );
+	tr.whiteImage = R_CreateImage("*white", (byte *)data, 8, 8, qfalse, qfalse, GL_REPEAT );
+
+	// with overbright bits active, we need an image which is some fraction of full color,
+	// for default lightmaps, etc
+	for (x=0 ; x<DEFAULT_SIZE ; x++) {
+		for (y=0 ; y<DEFAULT_SIZE ; y++) {
+			data[y][x][0] = 
+			data[y][x][1] = 
+			data[y][x][2] = tr.identityLightByte;
+			data[y][x][3] = 255;			
+		}
+	}
+
+	tr.identityLightImage = R_CreateImage("*identityLight", (byte *)data, 8, 8, qfalse, qfalse, GL_REPEAT );
+
+
+	for(x=0;x<32;x++) {
+		// scratchimage is usually used for cinematic drawing
+		tr.scratchImage[x] = R_CreateImage("*scratch", (byte *)data, DEFAULT_SIZE, DEFAULT_SIZE, qfalse, qtrue, GL_CLAMP );
+	}
+
+	R_CreateDlightImage();
+	R_CreateFogImage();
+}
+
+
+/*
+===============
+R_SetColorMappings
+===============
+*/
+void R_SetColorMappings( void ) {
+	int		i, j;
+	float	g;
+	int		inf;
+	int		shift;
+
+	// setup the overbright lighting
+	tr.overbrightBits = r_overBrightBits->integer;
+	if ( !glConfig.deviceSupportsGamma ) {
+		tr.overbrightBits = 0;		// need hardware gamma for overbright
+	}
+
+	// never overbright in windowed mode
+	if ( !glConfig.isFullscreen ) 
+	{
+		tr.overbrightBits = 0;
+	}
+
+	// allow 2 overbright bits in 24 bit, but only 1 in 16 bit
+	if ( glConfig.colorBits > 16 ) {
+		if ( tr.overbrightBits > 2 ) {
+			tr.overbrightBits = 2;
+		}
+	} else {
+		if ( tr.overbrightBits > 1 ) {
+			tr.overbrightBits = 1;
+		}
+	}
+	if ( tr.overbrightBits < 0 ) {
+		tr.overbrightBits = 0;
+	}
+
+	tr.identityLight = 1.0f / ( 1 << tr.overbrightBits );
+	tr.identityLightByte = 255 * tr.identityLight;
+
+
+	if ( r_intensity->value <= 1 ) {
+		ri.Cvar_Set( "r_intensity", "1" );
+	}
+
+	if ( r_gamma->value < 0.5f ) {
+		ri.Cvar_Set( "r_gamma", "0.5" );
+	} else if ( r_gamma->value > 3.0f ) {
+		ri.Cvar_Set( "r_gamma", "3.0" );
+	}
+
+	g = r_gamma->value;
+
+	shift = tr.overbrightBits;
+
+	for ( i = 0; i < 256; i++ ) {
+		if ( g == 1 ) {
+			inf = i;
+		} else {
+			inf = 255 * pow ( i/255.0f, 1.0f / g ) + 0.5f;
+		}
+		inf <<= shift;
+		if (inf < 0) {
+			inf = 0;
+		}
+		if (inf > 255) {
+			inf = 255;
+		}
+		s_gammatable[i] = inf;
+	}
+
+	for (i=0 ; i<256 ; i++) {
+		j = i * r_intensity->value;
+		if (j > 255) {
+			j = 255;
+		}
+		s_intensitytable[i] = j;
+	}
+
+	if ( glConfig.deviceSupportsGamma )
+	{
+		GLimp_SetGamma( s_gammatable, s_gammatable, s_gammatable );
+	}
+}
+
+/*
+===============
+R_InitImages
+===============
+*/
+void	R_InitImages( void ) {
+	Com_Memset(hashTable, 0, sizeof(hashTable));
+	// build brightness translation tables
+	R_SetColorMappings();
+
+	// create default texture and white texture
+	R_CreateBuiltinImages();
+}
+
+/*
+===============
+R_DeleteTextures
+===============
+*/
+void R_DeleteTextures( void ) {
+	int		i;
+
+	for ( i=0; i<tr.numImages ; i++ ) {
+		qglDeleteTextures( 1, &tr.images[i]->texnum );
+	}
+	Com_Memset( tr.images, 0, sizeof( tr.images ) );
+
+	tr.numImages = 0;
+
+	Com_Memset( glState.currenttextures, 0, sizeof( glState.currenttextures ) );
+	if ( qglBindTexture ) {
+		if ( qglActiveTextureARB ) {
+			GL_SelectTexture( 1 );
+			qglBindTexture( GL_TEXTURE_2D, 0 );
+			GL_SelectTexture( 0 );
+			qglBindTexture( GL_TEXTURE_2D, 0 );
+		} else {
+			qglBindTexture( GL_TEXTURE_2D, 0 );
+		}
+	}
+}
+
+/*
+============================================================================
+
+SKINS
+
+============================================================================
+*/
+
+/*
+==================
+CommaParse
+
+This is unfortunate, but the skin files aren't
+compatable with our normal parsing rules.
+==================
+*/
+static char *CommaParse( char **data_p ) {
+	int c = 0, len;
+	char *data;
+	static	char	com_token[MAX_TOKEN_CHARS];
+
+	data = *data_p;
+	len = 0;
+	com_token[0] = 0;
+
+	// make sure incoming data is valid
+	if ( !data ) {
+		*data_p = NULL;
+		return com_token;
+	}
+
+	while ( 1 ) {
+		// skip whitespace
+		while( (c = *data) <= ' ') {
+			if( !c ) {
+				break;
+			}
+			data++;
+		}
+
+
+		c = *data;
+
+		// skip double slash comments
+		if ( c == '/' && data[1] == '/' )
+		{
+			while (*data && *data != '\n')
+				data++;
+		}
+		// skip /* */ comments
+		else if ( c=='/' && data[1] == '*' ) 
+		{
+			while ( *data && ( *data != '*' || data[1] != '/' ) ) 
+			{
+				data++;
+			}
+			if ( *data ) 
+			{
+				data += 2;
+			}
+		}
+		else
+		{
+			break;
+		}
+	}
+
+	if ( c == 0 ) {
+		return "";
+	}
+
+	// handle quoted strings
+	if (c == '\"')
+	{
+		data++;
+		while (1)
+		{
+			c = *data++;
+			if (c=='\"' || !c)
+			{
+				com_token[len] = 0;
+				*data_p = ( char * ) data;
+				return com_token;
+			}
+			if (len < MAX_TOKEN_CHARS)
+			{
+				com_token[len] = c;
+				len++;
+			}
+		}
+	}
+
+	// parse a regular word
+	do
+	{
+		if (len < MAX_TOKEN_CHARS)
+		{
+			com_token[len] = c;
+			len++;
+		}
+		data++;
+		c = *data;
+	} while (c>32 && c != ',' );
+
+	if (len == MAX_TOKEN_CHARS)
+	{
+//		Com_Printf ("Token exceeded %i chars, discarded.\n", MAX_TOKEN_CHARS);
+		len = 0;
+	}
+	com_token[len] = 0;
+
+	*data_p = ( char * ) data;
+	return com_token;
+}
+
+
+/*
+===============
+RE_RegisterSkin
+
+===============
+*/
+qhandle_t RE_RegisterSkin( const char *name ) {
+	qhandle_t	hSkin;
+	skin_t		*skin;
+	skinSurface_t	*surf;
+	char		*text, *text_p;
+	char		*token;
+	char		surfName[MAX_QPATH];
+
+	if ( !name || !name[0] ) {
+		Com_Printf( "Empty name passed to RE_RegisterSkin\n" );
+		return 0;
+	}
+
+	if ( strlen( name ) >= MAX_QPATH ) {
+		Com_Printf( "Skin name exceeds MAX_QPATH\n" );
+		return 0;
+	}
+
+
+	// see if the skin is already loaded
+	for ( hSkin = 1; hSkin < tr.numSkins ; hSkin++ ) {
+		skin = tr.skins[hSkin];
+		if ( !Q_stricmp( skin->name, name ) ) {
+			if( skin->numSurfaces == 0 ) {
+				return 0;		// default skin
+			}
+			return hSkin;
+		}
+	}
+
+	// allocate a new skin
+	if ( tr.numSkins == MAX_SKINS ) {
+		ri.Printf( PRINT_WARNING, "WARNING: RE_RegisterSkin( '%s' ) MAX_SKINS hit\n", name );
+		return 0;
+	}
+	tr.numSkins++;
+	skin = ri.Hunk_Alloc( sizeof( skin_t ), h_low );
+	tr.skins[hSkin] = skin;
+	Q_strncpyz( skin->name, name, sizeof( skin->name ) );
+	skin->numSurfaces = 0;
+
+	// make sure the render thread is stopped
+	R_SyncRenderThread();
+
+	// If not a .skin file, load as a single shader
+	if ( strcmp( name + strlen( name ) - 5, ".skin" ) ) {
+		skin->numSurfaces = 1;
+		skin->surfaces[0] = ri.Hunk_Alloc( sizeof(skin->surfaces[0]), h_low );
+		skin->surfaces[0]->shader = R_FindShader( name, LIGHTMAP_NONE, qtrue );
+		return hSkin;
+	}
+
+	// load and parse the skin file
+    ri.FS_ReadFile( name, (void **)&text );
+	if ( !text ) {
+		return 0;
+	}
+
+	text_p = text;
+	while ( text_p && *text_p ) {
+		// get surface name
+		token = CommaParse( &text_p );
+		Q_strncpyz( surfName, token, sizeof( surfName ) );
+
+		if ( !token[0] ) {
+			break;
+		}
+		// lowercase the surface name so skin compares are faster
+		Q_strlwr( surfName );
+
+		if ( *text_p == ',' ) {
+			text_p++;
+		}
+
+		if ( strstr( token, "tag_" ) ) {
+			continue;
+		}
+		
+		// parse the shader name
+		token = CommaParse( &text_p );
+
+		surf = skin->surfaces[ skin->numSurfaces ] = ri.Hunk_Alloc( sizeof( *skin->surfaces[0] ), h_low );
+		Q_strncpyz( surf->name, surfName, sizeof( surf->name ) );
+		surf->shader = R_FindShader( token, LIGHTMAP_NONE, qtrue );
+		skin->numSurfaces++;
+	}
+
+	ri.FS_FreeFile( text );
+
+
+	// never let a skin have 0 shaders
+	if ( skin->numSurfaces == 0 ) {
+		return 0;		// use default skin
+	}
+
+	return hSkin;
+}
+
+
+/*
+===============
+R_InitSkins
+===============
+*/
+void	R_InitSkins( void ) {
+	skin_t		*skin;
+
+	tr.numSkins = 1;
+
+	// make the default skin have all default shaders
+	skin = tr.skins[0] = ri.Hunk_Alloc( sizeof( skin_t ), h_low );
+	Q_strncpyz( skin->name, "<default skin>", sizeof( skin->name )  );
+	skin->numSurfaces = 1;
+	skin->surfaces[0] = ri.Hunk_Alloc( sizeof( *skin->surfaces ), h_low );
+	skin->surfaces[0]->shader = tr.defaultShader;
+}
+
+/*
+===============
+R_GetSkinByHandle
+===============
+*/
+skin_t	*R_GetSkinByHandle( qhandle_t hSkin ) {
+	if ( hSkin < 1 || hSkin >= tr.numSkins ) {
+		return tr.skins[0];
+	}
+	return tr.skins[ hSkin ];
+}
+
+/*
+===============
+R_SkinList_f
+===============
+*/
+void	R_SkinList_f( void ) {
+	int			i, j;
+	skin_t		*skin;
+
+	ri.Printf (PRINT_ALL, "------------------\n");
+
+	for ( i = 0 ; i < tr.numSkins ; i++ ) {
+		skin = tr.skins[i];
+
+		ri.Printf( PRINT_ALL, "%3i:%s\n", i, skin->name );
+		for ( j = 0 ; j < skin->numSurfaces ; j++ ) {
+			ri.Printf( PRINT_ALL, "       %s = %s\n", 
+				skin->surfaces[j]->name, skin->surfaces[j]->shader->name );
+		}
+	}
+	ri.Printf (PRINT_ALL, "------------------\n");
+}
+