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

Return to Castle Wolfenstein single player GPL Source Code
Copyright (C) 1999-2010 id Software LLC, a ZeniMax Media company. 

This file is part of the Return to Castle Wolfenstein single player GPL Source Code (RTCW SP Source Code).  

RTCW SP 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 3 of the License, or
(at your option) any later version.

RTCW SP 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 RTCW SP Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the RTCW SP Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the RTCW SP Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

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

/*
 * name:		tr_image.c
 *
 * desc:
 *
*/

#include "tr_local.h"

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      4096
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->flags & IMGFLAG_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;
	int estTotalSize = 0;

	ri.Printf(PRINT_ALL, "\n      -w-- -h-- type  -size- --name-------\n");

	for ( i = 0 ; i < tr.numImages ; i++ )
	{
		image_t *image = tr.images[i];
		char *format = "???? ";
		char *sizeSuffix;
		int estSize;
		int displaySize;

		estSize = image->uploadHeight * image->uploadWidth;

		switch(image->internalFormat)
		{
#ifndef USE_OPENGLES
			case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
				format = "sDXT1";
				// 64 bits per 16 pixels, so 4 bits per pixel
				estSize /= 2;
				break;
			case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
				format = "sDXT5";
				// 128 bits per 16 pixels, so 1 byte per pixel
				break;
			case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB:
				format = "sBPTC";
				// 128 bits per 16 pixels, so 1 byte per pixel
				break;
			case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
				format = "LATC ";
				// 128 bits per 16 pixels, so 1 byte per pixel
				break;
			case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
				format = "DXT1 ";
				// 64 bits per 16 pixels, so 4 bits per pixel
				estSize /= 2;
				break;
			case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
				format = "DXT5 ";
				// 128 bits per 16 pixels, so 1 byte per pixel
				break;
			case GL_COMPRESSED_RGBA_BPTC_UNORM_ARB:
				format = "BPTC ";
				// 128 bits per 16 pixels, so 1 byte per pixel
				break;
			case GL_RGB4_S3TC:
				format = "S3TC ";
				// same as DXT1?
				estSize /= 2;
				break;
#endif
			case GL_RGBA4:
#ifndef USE_OPENGLES
			case GL_RGBA8:
#endif
			case GL_RGBA:
				format = "RGBA ";
				// 4 bytes per pixel
				estSize *= 4;
				break;
#ifndef USE_OPENGLES
			case GL_LUMINANCE8:
#endif
			case GL_LUMINANCE:
				format = "L    ";
				// 1 byte per pixel?
				break;
			case GL_RGB5:
#ifndef USE_OPENGLES
			case GL_RGB8:
#endif
			case GL_RGB:
				format = "RGB  ";
				// 3 bytes per pixel?
				estSize *= 3;
				break;
#ifndef USE_OPENGLES
			case GL_LUMINANCE8_ALPHA8:
#endif
			case GL_LUMINANCE_ALPHA:
				format = "LA   ";
				// 2 bytes per pixel?
				estSize *= 2;
				break;
#ifndef USE_OPENGLES
			case GL_SRGB_EXT:
			case GL_SRGB8_EXT:
				format = "sRGB ";
				// 3 bytes per pixel?
				estSize *= 3;
				break;
			case GL_SRGB_ALPHA_EXT:
			case GL_SRGB8_ALPHA8_EXT:
				format = "sRGBA";
				// 4 bytes per pixel?
				estSize *= 4;
				break;
			case GL_SLUMINANCE_EXT:
			case GL_SLUMINANCE8_EXT:
				format = "sL   ";
				// 1 byte per pixel?
				break;
			case GL_SLUMINANCE_ALPHA_EXT:
			case GL_SLUMINANCE8_ALPHA8_EXT:
				format = "sLA  ";
				// 2 byte per pixel?
				estSize *= 2;
				break;
#endif
		}

		// mipmap adds about 50%
		if (image->flags & IMGFLAG_MIPMAP)
			estSize += estSize / 2;

		sizeSuffix = "b ";
		displaySize = estSize;

		if (displaySize > 1024)
		{
			displaySize /= 1024;
			sizeSuffix = "kb";
		}

		if (displaySize > 1024)
		{
			displaySize /= 1024;
			sizeSuffix = "Mb";
		}

		if (displaySize > 1024)
		{
			displaySize /= 1024;
			sizeSuffix = "Gb";
		}

		ri.Printf(PRINT_ALL, "%4i: %4ix%4i %s %4i%s %s\n", i, image->uploadWidth, image->uploadHeight, format, displaySize, sizeSuffix, image->imgName);
		estTotalSize += estSize;
	}

	ri.Printf (PRINT_ALL, " ---------\n");
	ri.Printf (PRINT_ALL, " approx %i bytes\n", estTotalSize);
	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[1024], p2[1024];
	byte        *pix1, *pix2, *pix3, *pix4;

	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 );
		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;
			}
		}
	}

	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_MipMap

Operates in place, quartering the size of the texture
================
*/
static float R_RMSE( byte *in, int width, int height ) {
	int i, j;
	float out, rmse, rtemp;
	int row;

	rmse = 0.0f;

	if ( width <= 32 || height <= 32 ) {
		return 9999.0f;
	}

	row = width * 4;

	width >>= 1;
	height >>= 1;

	for ( i = 0 ; i < height ; i++, in += row ) {
		for ( j = 0 ; j < width ; j++, out += 4, in += 8 ) {
			out = ( in[0] + in[4] + in[row + 0] + in[row + 4] ) >> 2;
			rtemp = ( ( fabs( out - in[0] ) + fabs( out - in[4] ) + fabs( out - in[row + 0] ) + fabs( out - in[row + 4] ) ) );
			rtemp = rtemp * rtemp;
			rmse += rtemp;
			out = ( in[1] + in[5] + in[row + 1] + in[row + 5] ) >> 2;
			rtemp = ( ( fabs( out - in[1] ) + fabs( out - in[5] ) + fabs( out - in[row + 1] ) + fabs( out - in[row + 5] ) ) );
			rtemp = rtemp * rtemp;
			rmse += rtemp;
			out = ( in[2] + in[6] + in[row + 2] + in[row + 6] ) >> 2;
			rtemp = ( ( fabs( out - in[2] ) + fabs( out - in[6] ) + fabs( out - in[row + 2] ) + fabs( out - in[row + 6] ) ) );
			rtemp = rtemp * rtemp;
			rmse += rtemp;
			out = ( in[3] + in[7] + in[row + 3] + in[row + 7] ) >> 2;
			rtemp = ( ( fabs( out - in[3] ) + fabs( out - in[7] ) + fabs( out - in[row + 3] ) + fabs( out - in[row + 7] ) ) );
			rtemp = rtemp * rtemp;
			rmse += rtemp;
		}
	}
	rmse = sqrt( rmse / ( height * width * 4 ) );
	return rmse;
}


/*
==================
R_BlendOverTexture

Apply a color blend over a set of pixels
==================
*/
#ifndef USE_OPENGLES
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;
	}
}
#endif

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},
};


#ifdef USE_OPENGLES
// helper function for GLES format conversions
byte * gles_convertRGB(byte * data, int width, int height)
{
	byte * temp = (byte *) ri.Z_Malloc (width*height*3);
	byte *src = data;
	byte *dst = temp;
	int i,j;
	
	for (i=0; i<width*height; i++) {
		for (j=0; j<3; j++)
			*(dst++) = *(src++);
		src++;
	}
	
	return temp;
}
byte *  gles_convertRGBA4(byte * data, int width, int height)
{
	byte * temp = (byte *) ri.Z_Malloc (width*height*2);
	int i;
	
	unsigned int * input = ( unsigned int *)(data);
	unsigned short* output = (unsigned short*)(temp);

	for (i = 0; i < width*height; i++) {
		unsigned int pixel = input[i];

		// Unpack the source data as 8 bit values
		unsigned int r = pixel & 0xff;
		unsigned int g = (pixel >> 8) & 0xff;
		unsigned int b = (pixel >> 16) & 0xff;
		unsigned int a = (pixel >> 24) & 0xff;

		// Convert to 4 bit vales
		r >>= 4; g >>= 4; b >>= 4; a >>= 4;
		output[i] = r << 12 | g << 8 | b << 4 | a;
	}

	return temp;
}
byte * gles_convertRGB5(byte * data, int width, int height)
{
	byte * temp = (byte *) ri.Z_Malloc (width*height*2);
	int i;
	
	unsigned int * input = ( unsigned int *)(data);
	unsigned short* output = (unsigned short*)(temp);

	for (i = 0; i < width*height; i++) {
		unsigned int pixel = input[i];

		// Unpack the source data as 8 bit values
		unsigned int r = pixel & 0xff;
		unsigned int g = (pixel >> 8) & 0xff;
		unsigned int b = (pixel >> 16) & 0xff;

		// Convert to 4 bit vales
		r >>= 3; g >>= 2; b >>= 3; 
		output[i] = r << 11 | g << 5 | b;
	}

	return temp;
}
byte * gles_convertLuminance(byte * data, int width, int height)
{
	byte * temp = (byte *) ri.Z_Malloc (width*height);
	int i;
	
	unsigned int * input = ( unsigned int *)(data);
	byte* output = (byte*)(temp);

	for (i = 0; i < width*height; i++) {
		unsigned int pixel = input[i];

		// Unpack the source data as 8 bit values
		unsigned int r = pixel & 0xff;
		output[i] = r;
	}

	return temp;
}
byte * gles_convertLuminanceAlpha(byte * data, int width, int height)
{
	byte * temp = (byte *) ri.Z_Malloc (width*height*2);
	int i;
	
	unsigned int * input = ( unsigned int *)(data);
	unsigned short* output = (unsigned short*)(temp);

	for (i = 0; i < width*height; i++) {
		unsigned int pixel = input[i];

		// Unpack the source data as 8 bit values
		unsigned int r = pixel & 0xff;
		unsigned int a = (pixel >> 24) & 0xff;
		output[i] = r | a<<8;
	}

	return temp;
}
#endif

/*
===============
Upload32

===============
*/
static void Upload32(   unsigned *data,
						int width, int height,
						qboolean mipmap,
						qboolean picmip,
						qboolean characterMip,  //----(SA)	added
						qboolean lightMap,
						int *format,
						int *pUploadWidth, int *pUploadHeight,
						qboolean noCompress ) {
	int samples;
	int scaled_width, scaled_height;
	unsigned    *scaledBuffer = NULL;
	unsigned    *resampledBuffer = NULL;
	int i, c;
	byte        *scan;
	GLenum internalFormat = GL_RGB;
	float rMax = 0, gMax = 0, bMax = 0;
	static int rmse_saved = 0;
#ifndef USE_BLOOM
	float rmse;
#endif

	// do the root mean square error stuff first
	if ( r_rmse->value ) {
		while ( R_RMSE( (byte *)data, width, height ) < r_rmse->value ) {
			rmse_saved += ( height * width * 4 ) - ( ( width >> 1 ) * ( height >> 1 ) * 4 );
			resampledBuffer = ri.Hunk_AllocateTempMemory( ( width >> 1 ) * ( height >> 1 ) * 4 );
			ResampleTexture( data, width, height, resampledBuffer, width >> 1, height >> 1 );
			data = resampledBuffer;
			width = width >> 1;
			height = height >> 1;
			ri.Printf( PRINT_ALL, "r_rmse of %f has saved %dkb\n", r_rmse->value, ( rmse_saved / 1024 ) );
		}
	}
#ifndef USE_BLOOM
	else
	{
		// just do the RMSE of 1 (reduce perfect)
		while ( R_RMSE( (byte *)data, width, height ) < 1.0 ) {
			rmse_saved += ( height * width * 4 ) - ( ( width >> 1 ) * ( height >> 1 ) * 4 );
			resampledBuffer = ri.Hunk_AllocateTempMemory( ( width >> 1 ) * ( height >> 1 ) * 4 );
			ResampleTexture( data, width, height, resampledBuffer, width >> 1, height >> 1 );
			data = resampledBuffer;
			width = width >> 1;
			height = height >> 1;
			ri.Printf( PRINT_ALL, "r_rmse of %f has saved %dkb\n", r_rmse->value, ( rmse_saved / 1024 ) );
		}
	}
#endif
	//
	// 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 ) {
		if ( characterMip ) {
			scaled_width >>= r_picmip2->integer;
			scaled_height >>= r_picmip2->integer;
		} else {
			scaled_width >>= r_picmip->integer;
			scaled_height >>= r_picmip->integer;
		}
	}

	//
	// 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;
	}

#ifndef USE_BLOOM
	rmse = R_RMSE( (byte *)data, width, height );

	if ( r_lowMemTextureSize->integer && ( scaled_width > r_lowMemTextureSize->integer || scaled_height > r_lowMemTextureSize->integer ) && rmse < r_lowMemTextureThreshold->value ) {
		int scale;

		for ( scale = 1 ; scale < r_lowMemTextureSize->integer; scale <<= 1 ) {
			;
		}

		while ( scaled_width > scale || scaled_height > scale ) {
			scaled_width >>= 1;
			scaled_height >>= 1;
		}

		ri.Printf( PRINT_ALL, "r_lowMemTextureSize forcing reduction from %i x %i to %i x %i\n", width, height, scaled_width, scaled_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;

	}
#endif

	//
	// clamp to minimum size
	//
	if ( scaled_width < 1 ) {
		scaled_width = 1;
	}
	if ( scaled_height < 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( r_greyscale->integer )
	{
		for ( i = 0; i < c; i++ )
		{
			byte luma = LUMA(scan[i*4], scan[i*4 + 1], scan[i*4 + 2]);
			scan[i*4] = luma;
			scan[i*4 + 1] = luma;
			scan[i*4 + 2] = luma;
		}
	}
	else if( r_greyscale->value )
	{
		for ( i = 0; i < c; i++ )
		{
			float luma = LUMA(scan[i*4], scan[i*4 + 1], scan[i*4 + 2]);
			scan[i*4] = LERP(scan[i*4], luma, r_greyscale->value);
			scan[i*4 + 1] = LERP(scan[i*4 + 1], luma, r_greyscale->value);
			scan[i*4 + 2] = LERP(scan[i*4 + 2], luma, r_greyscale->value);
		}
	}

	if(lightMap)
	{
		if(r_greyscale->integer)
			internalFormat = GL_LUMINANCE;
		else
			internalFormat = GL_RGB;
	}
	else
	{
		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(r_greyscale->integer)
			{
#ifndef USE_OPENGLES
				if(r_texturebits->integer == 16 || r_texturebits->integer == 32)
					internalFormat = GL_LUMINANCE8;
				else
#endif
					internalFormat = GL_LUMINANCE;
			}
			else
			{
#ifndef USE_OPENGLES
				if ( !noCompress && glConfig.textureCompression == TC_EXT_COMP_S3TC )
				{
					// TODO: which format is best for which textures?
					internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
				}
				else if ( !noCompress && glConfig.textureCompression == TC_S3TC )
				{
					internalFormat = GL_RGB4_S3TC;
				}
				else
#endif
				if ( r_texturebits->integer == 16 )
				{
					internalFormat = GL_RGB5;
				}
#ifndef USE_OPENGLES
				else if ( r_texturebits->integer == 32 )
				{
					internalFormat = GL_RGB8;
				}
#endif
				else
				{
					internalFormat = GL_RGB;
				}
			}
		}
		else if ( samples == 4 )
		{

			if(r_greyscale->integer)
			{
#ifndef USE_OPENGLES
				if(r_texturebits->integer == 16 || r_texturebits->integer == 32)
					internalFormat = GL_LUMINANCE8_ALPHA8;
				else
#endif
					internalFormat = GL_LUMINANCE_ALPHA;
			}
			else
			{
#ifndef USE_OPENGLES
				if ( !noCompress && glConfig.textureCompression == TC_EXT_COMP_S3TC )
				{
					// TODO: which format is best for which textures?
					internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
				}
				else
#endif
				if ( r_texturebits->integer == 16 )
				{
					internalFormat = GL_RGBA4;
				}
#ifndef USE_OPENGLES
				else if ( r_texturebits->integer == 32 )
				{
					internalFormat = GL_RGBA8;
				}
#endif
				else
				{
					internalFormat = GL_RGBA;
				}
			}
		}
	}

	// copy or resample data as appropriate for first MIP level
#ifdef USE_OPENGLES
		if ( ( scaled_width == width ) && 
			( scaled_height == height ) ) {
			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 );

		qglTexParameteri( GL_TEXTURE_2D, GL_GENERATE_MIPMAP, (mipmap)?GL_TRUE:GL_FALSE );

		// and now, convert if needed and upload
		// GLES doesn't do convertion itself, so we have to handle that
		byte *temp;
		switch ( internalFormat ) {
		 case GL_RGB5:
			temp = gles_convertRGB5((byte*)scaledBuffer, scaled_width, scaled_height);
			qglTexImage2D (GL_TEXTURE_2D, 0, GL_RGB, scaled_width, scaled_height, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, temp);
			ri.Free(temp);
			break;
		 case GL_RGBA4:
			temp = gles_convertRGBA4((byte*)scaledBuffer, width, height);
			qglTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, temp);
			ri.Free(temp);
			break;
		 case GL_RGB:
			temp = gles_convertRGB((byte*)scaledBuffer, width, height);
			qglTexImage2D (GL_TEXTURE_2D, 0, GL_RGB, scaled_width, scaled_height, 0, GL_RGB, GL_UNSIGNED_BYTE, temp);
			ri.Free(temp);
			break;
		 case GL_LUMINANCE:
			temp = gles_convertLuminance((byte*)scaledBuffer, width, height);
			qglTexImage2D (GL_TEXTURE_2D, 0, GL_LUMINANCE, scaled_width, scaled_height, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, temp);
			ri.Free(temp);
			break;
		 case GL_LUMINANCE_ALPHA:
			temp = gles_convertLuminanceAlpha((byte*)scaledBuffer, width, height);
			qglTexImage2D (GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, scaled_width, scaled_height, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, temp);
			ri.Free(temp);
			break;
		 default:
			internalFormat = GL_RGBA;
			qglTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, scaledBuffer);
		}

	*pUploadWidth = scaled_width;
	*pUploadHeight = scaled_height;
	*format = internalFormat;
		
	//	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
	//	qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
#else
	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;
		}
		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;
			}
		}
		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:
#endif

	if ( mipmap ) {
		if ( textureFilterAnisotropic )
			qglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT,
					(GLint)Com_Clamp( 1, maxAnisotropy, r_ext_max_anisotropy->integer ) );
		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min );
		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max );
	}
	else
	{
		if ( textureFilterAnisotropic )
			qglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, 1 );
		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 );
}



//----(SA)	modified

/*
================
R_CreateImage

This is the only way any image_t are created
================
*/
image_t *R_CreateImageExt( const char *name, byte *pic, int width, int height, imgType_t type, imgFlags_t flags, int internalFormat, qboolean characterMip )
{
	image_t     *image;
	qboolean isLightmap = qfalse;
	int         glWrapClampMode;
	long hash;
	qboolean noCompress = qfalse;

	if ( strlen( name ) >= MAX_QPATH ) {
		ri.Error( ERR_DROP, "R_CreateImage: \"%s\" is too long", name );
	}
	if ( !strncmp( name, "*lightmap", 9 ) ) {
		isLightmap = qtrue;
		noCompress = qtrue;
	}
	if ( !noCompress && strstr( name, "skies" ) ) {
		noCompress = qtrue;
	}
	if ( !noCompress && strstr( name, "weapons" ) ) {    // don't compress view weapon skins
		noCompress = qtrue;
	}
	// RF, if the shader hasn't specifically asked for it, don't allow compression
	if ( r_ext_compressed_textures->integer == 2 && ( tr.allowCompress != qtrue ) ) {
		noCompress = qtrue;
	} else if ( r_ext_compressed_textures->integer == 1 && ( tr.allowCompress < 0 ) )     {
		noCompress = qtrue;
	}

	if ( tr.numImages == MAX_DRAWIMAGES ) {
		ri.Error( ERR_DROP, "R_CreateImage: MAX_DRAWIMAGES hit" );
	}

	// Ridah
	image = tr.images[tr.numImages] = ri.Hunk_Alloc( sizeof( image_t ), h_low );
	qglGenTextures( 1, &image->texnum );
	tr.numImages++;

	image->type = type;
	image->flags = flags;

	strcpy( image->imgName, name );

	image->width = width;
	image->height = height;
	if (flags & IMGFLAG_CLAMPTOEDGE)
		glWrapClampMode = GL_CLAMP_TO_EDGE;
	else
		glWrapClampMode = GL_REPEAT;

	// 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->flags & IMGFLAG_MIPMAP,
			  image->flags & IMGFLAG_PICMIP,
			  characterMip,                     //----(SA)	added
			  isLightmap,
			  &image->internalFormat,
			  &image->uploadWidth,
			  &image->uploadHeight,
			  noCompress );

	qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, glWrapClampMode );
	qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, glWrapClampMode );

	glState.currenttextures[glState.currenttmu] = 0;
	qglBindTexture( GL_TEXTURE_2D, 0 );

	if ( image->TMU == 1 ) {
		GL_SelectTexture( 0 );
	}

	hash = generateHashValue( name );
	image->next = hashTable[hash];
	hashTable[hash] = image;

	// Ridah
	image->hash = hash;

	return image;
}

image_t *R_CreateImage( const char *name, byte *pic, int width, int height,
		imgType_t type, imgFlags_t flags, int internalFormat ) {
	return R_CreateImageExt( name, pic, width, height, type, flags, 0, qfalse );
}

//----(SA)	end

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

typedef struct
{
	char *ext;
	void (*ImageLoader)( const char *, unsigned char **, int *, int * );
} imageExtToLoaderMap_t;

// Note that the ordering indicates the order of preference used
// when there are multiple images of different formats available
static imageExtToLoaderMap_t imageLoaders[ ] =
{
	{ "tga",  R_LoadTGA },
	{ "jpg",  R_LoadJPG },
	{ "jpeg", R_LoadJPG },
	{ "png",  R_LoadPNG },
	{ "pcx",  R_LoadPCX },
	{ "bmp",  R_LoadBMP }
};
 
static int numImageLoaders = ARRAY_LEN( imageLoaders );


/*
=================
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 )
{
	qboolean orgNameFailed = qfalse;
	int orgLoader = -1;
	int i;
	char localName[ MAX_QPATH ];
	const char *ext;
	char *altName;

	*pic = NULL;
	*width = 0;
	*height = 0;

	Q_strncpyz( localName, name, MAX_QPATH );

	ext = COM_GetExtension( localName );

	if( *ext )
	{
		// Look for the correct loader and use it
		for( i = 0; i < numImageLoaders; i++ )
		{
			if( !Q_stricmp( ext, imageLoaders[ i ].ext ) )
			{
				// Load
				imageLoaders[ i ].ImageLoader( localName, pic, width, height );
				break;
			}
		}

		// A loader was found
		if( i < numImageLoaders )
		{
			if( *pic == NULL )
			{
				// Loader failed, most likely because the file isn't there;
				// try again without the extension
				orgNameFailed = qtrue;
				orgLoader = i;
				COM_StripExtension( name, localName, MAX_QPATH );
			}
			else
			{
				// Something loaded
				return;
			}
		}
	}

	// Try and find a suitable match using all
	// the image formats supported
	for( i = 0; i < numImageLoaders; i++ )
	{
		if (i == orgLoader)
			continue;

		altName = va( "%s.%s", localName, imageLoaders[ i ].ext );

		// Load
		imageLoaders[ i ].ImageLoader( altName, pic, width, height );

		if( *pic )
		{
			if( orgNameFailed )
			{
				ri.Printf( PRINT_DEVELOPER, "WARNING: %s not present, using %s instead\n",
						name, altName );
			}

			break;
		}
	}
}


//----(SA)	modified
/*
===============
R_FindImageFile

Finds or loads the given image.
Returns NULL if it fails, not a default image.
==============
*/


image_t *R_FindImageFileExt( const char *name, imgType_t type, imgFlags_t flags, qboolean characterMIP ) {
	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 ( !Q_stricmp( 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->flags != flags ) {
					ri.Printf( PRINT_DEVELOPER, "WARNING: reused image %s with mixed flags (%i vs %i)\n", name, image->flags, flags );
				}
				if ( image->characterMIP != characterMIP ) {
					ri.Printf( PRINT_DEVELOPER, "WARNING: reused image %s with mixed characterMIP parm\n", name );
				}
			}
			return image;
		}
	}

	//
	// load the pic from disk
	//
	R_LoadImage( name, &pic, &width, &height );
	if ( pic == NULL ) {
		return NULL;
	}

	image = R_CreateImageExt( ( char * ) name, pic, width, height, type, flags, 0, characterMIP );
	ri.Free( pic );
	return image;
}


image_t *R_FindImageFile( const char *name, imgType_t type, imgFlags_t flags ) {
	return R_FindImageFileExt( name, type, flags, qfalse );
}

//----(SA)	end

/*
================
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, IMGTYPE_COLORALPHA, IMGFLAG_CLAMPTOEDGE, 0 );
}


/*
=================
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 d;

	data = ri.Hunk_AllocateTempMemory( FOG_S * FOG_T * 4 );

	// 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;
		}
	}
	tr.fogImage = R_CreateImage( "*fog", (byte *)data, FOG_S, FOG_T, IMGTYPE_COLORALPHA, IMGFLAG_CLAMPTOEDGE, 0 );
	ri.Hunk_FreeTempMemory( data );
}

/*
==================
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
	memset( data, 32, sizeof( data ) );
	for ( x = 0 ; x < DEFAULT_SIZE ; x++ ) {
		data[0][x][0] =
			data[0][x][1] =
				data[0][x][2] = 0; //----(SA) to make the default grid noticable but not blinding
		data[0][x][3] = 255;

		data[x][0][0] =
			data[x][0][1] =
				data[x][0][2] = 0; //----(SA) to make the default grid noticable but not blinding
		data[x][0][3] = 255;

		data[DEFAULT_SIZE - 1][x][0] =
			data[DEFAULT_SIZE - 1][x][1] =
				data[DEFAULT_SIZE - 1][x][2] = 0; //----(SA) to make the default grid noticable but not blinding
		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] = 0; //----(SA) to make the default grid noticable but not blinding
		data[x][DEFAULT_SIZE - 1][3] = 255;
	}
	tr.defaultImage = R_CreateImage( "*default", (byte *)data, DEFAULT_SIZE, DEFAULT_SIZE, IMGTYPE_COLORALPHA, IMGFLAG_MIPMAP, 0 );
}

/*
==================
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
	memset( data, 255, sizeof( data ) );
	tr.whiteImage = R_CreateImage( "*white", (byte *)data, 8, 8, IMGTYPE_COLORALPHA, IMGFLAG_NONE, 0 );

	// 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, IMGTYPE_COLORALPHA, IMGFLAG_NONE, 0 );


	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, IMGTYPE_COLORALPHA, IMGFLAG_PICMIP | IMGFLAG_CLAMPTOEDGE, 0 );
	}

	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 ) {
	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 ( 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] == '/' )
		{
			data += 2;
			while ( *data && *data != '\n' ) {
				data++;
			}
		}
		// skip /* */ comments
		else if ( c == '/' && data[1] == '*' )
		{
			data += 2;
			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 - 1 ) {
				com_token[len] = c;
				len++;
			}
		}
	}

	// parse a regular word
	do
	{
		if ( len < MAX_TOKEN_CHARS - 1 ) {
			com_token[len] = c;
			len++;
		}
		data++;
		c = *data;
	} while ( c > 32 && c != ',' );

	com_token[len] = 0;

	*data_p = ( char * ) data;
	return com_token;
}


//----(SA) added so client can see what model or scale for the model was specified in a skin
/*
==============
RE_GetSkinModel
==============
*/
qboolean RE_GetSkinModel( qhandle_t skinid, const char *type, char *name ) {
	int i;
	skin_t      *bar;

	if ( skinid < 1 || skinid >= tr.numSkins ) {
		return qfalse;
	}

	bar = tr.skins[skinid];

	if ( !Q_stricmp( type, "playerscale" ) ) {    // client is requesting scale from the skin rather than a model
		Com_sprintf( name, MAX_QPATH, "%.2f %.2f %.2f", bar->scale[0], bar->scale[1], bar->scale[2] );
		return qtrue;
	}

	for ( i = 0; i < bar->numModels; i++ )
	{
		if ( !Q_stricmp( bar->models[i]->type, type ) ) { // (SA) whoops, should've been this way
			Q_strncpyz( name, bar->models[i]->model, sizeof( bar->models[i]->model ) );
			return qtrue;
		}
	}
	return qfalse;
}

/*
==============
RE_GetShaderFromModel
	return a shader index for a given model's surface
	'withlightmap' set to '0' will create a new shader that is a copy of the one found
	on the model, without the lighmap stage, if the shader has a lightmap stage

	NOTE: only works for bmodels right now.  Could modify for other models (md3's etc.)
==============
*/
qhandle_t RE_GetShaderFromModel( qhandle_t modelid, int surfnum, int withlightmap ) {
	model_t     *model;
	bmodel_t    *bmodel;
	msurface_t  *surf;
	shader_t    *shd;

	if ( surfnum < 0 ) {
		surfnum = 0;
	}

	model = R_GetModelByHandle( modelid );  // (SA) should be correct now

	if ( model ) {
		bmodel  = model->bmodel;
		if ( bmodel && bmodel->firstSurface ) {
			if ( surfnum >= bmodel->numSurfaces ) { // if it's out of range, return the first surface
				surfnum = 0;
			}

			surf = bmodel->firstSurface + surfnum;
//			if(surf->shader->lightmapIndex != LIGHTMAP_NONE) {
			if ( surf->shader->lightmapIndex > LIGHTMAP_NONE ) {
				image_t *image;
				long hash;
				qboolean mip = qtrue;   // mip generation on by default

				// get mipmap info for original texture
				hash = generateHashValue( surf->shader->name );
				for ( image = hashTable[hash]; image; image = image->next ) {
					if ( !strcmp( surf->shader->name, image->imgName ) ) {
						mip = image->flags & IMGFLAG_MIPMAP;
						break;
					}
				}
				shd = R_FindShader( surf->shader->name, LIGHTMAP_NONE, mip );
				shd->stages[0]->rgbGen = CGEN_LIGHTING_DIFFUSE; // (SA) new
			} else {
				shd = surf->shader;
			}

			return shd->index;
		}
	}

	return 0;
}

//----(SA) end

/*
===============
RE_RegisterSkin

===============
*/
qhandle_t RE_RegisterSkin( const char *name ) {
	skinSurface_t parseSurfaces[MAX_SKIN_SURFACES];
	qhandle_t hSkin;
	skin_t      *skin;
	skinSurface_t   *surf;
	skinModel_t *model;          //----(SA) added
	union {
		char *c;
		void *v;
	} text;
	char		*text_p;
	char        *token;
	char surfName[MAX_QPATH];
	int			totalSurfaces;

	if ( !name || !name[0] ) {
		ri.Printf( PRINT_DEVELOPER, "Empty name passed to RE_RegisterSkin\n" );
		return 0;
	}

	if ( strlen( name ) >= MAX_QPATH ) {
		ri.Printf( PRINT_DEVELOPER, "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;
	}


//----(SA)	moved things around slightly to fix the problem where you restart
//			a map that has ai characters who had invalid skin names entered
//			in thier "skin" or "head" field

	R_IssuePendingRenderCommands();

	// If not a .skin file, load as a single shader
	if ( strcmp( name + strlen( name ) - 5, ".skin" ) ) {
		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;
		skin->numModels     = 0;    //----(SA) added
		skin->numSurfaces = 1;
		skin->surfaces = ri.Hunk_Alloc( sizeof( skinSurface_t ), h_low );
		skin->surfaces[0].shader = R_FindShader( name, LIGHTMAP_NONE, qtrue );
		return hSkin;
	}

	// load and parse the skin file
	ri.FS_ReadFile( name, &text.v );
	if ( !text.c ) {
		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;
	skin->numModels     = 0;    //----(SA) added

//----(SA)	end

	totalSurfaces = 0;
	text_p = text.c;
	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;
		}

		if ( strstr( token, "md3_" ) ) {  // this is specifying a model
			if ( skin->numModels >= MAX_PART_MODELS ) {
				ri.Printf( PRINT_WARNING, "WARNING: Ignoring models in '%s', the max is %d!\n", name, MAX_PART_MODELS );
				break;
			}

			model = skin->models[ skin->numModels ] = ri.Hunk_Alloc( sizeof( *skin->models[0] ), h_low );
			Q_strncpyz( model->type, token, sizeof( model->type ) );

			// get the model name
			token = CommaParse( &text_p );

			Q_strncpyz( model->model, token, sizeof( model->model ) );

			skin->numModels++;
			continue;
		}

//----(SA)	added
		if ( strstr( token, "playerscale" ) ) {
			token = CommaParse( &text_p );
			skin->scale[0] = atof( token );   // uniform scaling for now
			skin->scale[1] = atof( token );
			skin->scale[2] = atof( token );
			continue;
		}
//----(SA) end

		// parse the shader name
		token = CommaParse( &text_p );

		if ( skin->numSurfaces < MAX_SKIN_SURFACES ) {
			surf = &parseSurfaces[skin->numSurfaces];
			Q_strncpyz( surf->name, surfName, sizeof( surf->name ) );
			surf->shader = R_FindShader( token, LIGHTMAP_NONE, qtrue );
			skin->numSurfaces++;
		}

		totalSurfaces++;
	}

	ri.FS_FreeFile( text.v );

	if ( totalSurfaces > MAX_SKIN_SURFACES ) {
		ri.Printf( PRINT_WARNING, "WARNING: Ignoring excess surfaces (found %d, max is %d) in skin '%s'!\n",
					totalSurfaces, MAX_SKIN_SURFACES, name );
	}

	// never let a skin have 0 shaders
	//----(SA)	allow this for the (current) special case of the loper's upper body
	//			(it's upper body has no surfaces, only tags)
	if ( skin->numSurfaces == 0 ) {
		if ( !( strstr( name, "loper" ) && strstr( name, "upper" ) ) ) {
			return 0;       // use default skin
		}
	}

	// copy surfaces to skin
	skin->surfaces = ri.Hunk_Alloc( skin->numSurfaces * sizeof( skinSurface_t ), h_low );
	memcpy( skin->surfaces, parseSurfaces, skin->numSurfaces * sizeof( skinSurface_t ) );

	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 = ri.Hunk_Alloc( sizeof( skinSurface_t ), 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 (%d surfaces)\n", i, skin->name, skin->numSurfaces );
		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" );
}

// Ridah, utility for automatically cropping and numbering a bunch of images in a directory
/*
=============
SaveTGA

  saves out to 24 bit uncompressed format (no alpha)
=============
*/
void SaveTGA( char *name, byte **pic, int width, int height ) {
	byte    *inpixel, *outpixel;
	byte    *outbuf, *b;

	outbuf = ri.Hunk_AllocateTempMemory( width * height * 4 + 18 );
	b = outbuf;

	memset( b, 0, 18 );
	b[2] = 2;       // uncompressed type
	b[12] = width & 255;
	b[13] = width >> 8;
	b[14] = height & 255;
	b[15] = height >> 8;
	b[16] = 24; // pixel size

	{
		int row, col;
		int rows, cols;

		rows = ( height );
		cols = ( width );

		outpixel = b + 18;

		for ( row = ( rows - 1 ); row >= 0; row-- )
		{
			inpixel = ( ( *pic ) + ( row * cols ) * 4 );

			for ( col = 0; col < cols; col++ )
			{
				*outpixel++ = *( inpixel + 2 );   // blue
				*outpixel++ = *( inpixel + 1 );   // green
				*outpixel++ = *( inpixel + 0 );   // red
				//*outpixel++ = *(inpixel + 3);	// alpha

				inpixel += 4;
			}
		}
	}

	ri.FS_WriteFile( name, outbuf, (int)( outpixel - outbuf ) );

	ri.Hunk_FreeTempMemory( outbuf );

}

/*
=============
SaveTGAAlpha

  saves out to 32 bit uncompressed format (with alpha)
=============
*/
void SaveTGAAlpha( char *name, byte **pic, int width, int height ) {
	byte    *inpixel, *outpixel;
	byte    *outbuf, *b;

	outbuf = ri.Hunk_AllocateTempMemory( width * height * 4 + 18 );
	b = outbuf;

	memset( b, 0, 18 );
	b[2] = 2;       // uncompressed type
	b[12] = width & 255;
	b[13] = width >> 8;
	b[14] = height & 255;
	b[15] = height >> 8;
	b[16] = 32; // pixel size

	{
		int row, col;
		int rows, cols;

		rows = ( height );
		cols = ( width );

		outpixel = b + 18;

		for ( row = ( rows - 1 ); row >= 0; row-- )
		{
			inpixel = ( ( *pic ) + ( row * cols ) * 4 );

			for ( col = 0; col < cols; col++ )
			{
				*outpixel++ = *( inpixel + 2 );   // blue
				*outpixel++ = *( inpixel + 1 );   // green
				*outpixel++ = *( inpixel + 0 );   // red
				*outpixel++ = *( inpixel + 3 );   // alpha

				inpixel += 4;
			}
		}
	}

	ri.FS_WriteFile( name, outbuf, (int)( outpixel - outbuf ) );

	ri.Hunk_FreeTempMemory( outbuf );

}

/*
==============
R_CropImage
==============
*/
#define CROPIMAGES_ENABLED
//#define FUNNEL_HACK
#define RESIZE
//#define QUICKTIME_BANNER
#define TWILTB2_HACK

qboolean R_CropImage( char *name, byte **pic, int border, int *width, int *height, int lastBox[2] ) {
#ifdef CROPIMAGES_ENABLED
	int row, col;
	int rows, cols;
	byte    *inpixel, *temppic, *outpixel;
	int mins[2], maxs[2];
	int diff[2];
	//int	newWidth;
	int /*a, max,*/ i;
	int alpha;
	//int	*center;
	qboolean /*invalid,*/ skip;
	vec3_t fCol, fScale;
	qboolean filterColors = qfalse;
	int fCount;
	float f,c;
#define FADE_BORDER_RANGE   ( ( *width ) / 40 )

	rows = ( *height );
	cols = ( *width );

	mins[0] = 99999;
	mins[1] = 99999;
	maxs[0] = -99999;
	maxs[1] = -99999;

#ifdef TWILTB2_HACK
	// find the filter color (use first few pixels)
	filterColors = qtrue;
	inpixel = ( *pic );
	VectorClear( fCol );
	for ( fCount = 0; fCount < 8; fCount++, inpixel += 4 ) {
		for ( i = 0; i < 3; i++ ) {
			if ( *( inpixel + i ) > 70 ) {
				continue;   // too bright, cant be noise
			}
			if ( fCol[i] < *( inpixel + i ) ) {
				fCol[i] = *( inpixel + i );
			}
		}
	}
	//VectorScale( fCol, 1.0/fCount, fCol );
	for ( i = 0; i < 3; i++ ) {
		fCol[i] += 4;
		fScale[i] = 255.0 / ( 255.0 - fCol[i] );
	}
#endif

	for ( row = 0; row < rows; row++ )
	{
		inpixel = ( ( *pic ) + ( row * cols ) * 4 );

		for ( col = 0; col < cols; col++, inpixel += 4 )
		{
			if ( filterColors ) {
				// special code for filtering the twiltb series
				for ( i = 0; i < 3; i++ ) {
					f = *( inpixel + i );
					f -= fCol[i];
					if ( f <= 0 ) {
						f = 0;
					} else { f *= fScale[i];}
					if ( f > 255 ) {
						f = 255;
					}
					*( inpixel + i ) = f;
				}
				// if this pixel is near the edge, then fade it out (just do a brightness fade)
				if ( (int *)inpixel ) {
					// calc the fade scale
					f = (float)row / FADE_BORDER_RANGE;
					if ( f > (float)( rows - row - 1 ) / FADE_BORDER_RANGE ) {
						f = (float)( rows - row - 1 ) / FADE_BORDER_RANGE;
					}
					if ( f > (float)( cols - col - 1 ) / FADE_BORDER_RANGE ) {
						f = (float)( cols - col - 1 ) / FADE_BORDER_RANGE;
					}
					if ( f > (float)( col ) / FADE_BORDER_RANGE ) {
						f = (float)( col ) / FADE_BORDER_RANGE;
					}
					if ( f < 1.0 ) {
						if ( f <= 0 ) {
							*( (int *)inpixel ) = 0;
						} else {
							f += 0.2 * crandom();
							if ( f < 1.0 ) {
								if ( f <= 0 ) {
									*( (int *)inpixel ) = 0;
								} else {
									f = 1.0 - f;
									for ( i = 0; i < 3; i++ ) {
										c = *( inpixel + i );
										c -= f * c;
										if ( c < 0 ) {
											c = 0;
										}
										*( inpixel + i ) = c;
									}
								}
							}
						}
					}
				}
				continue;
			}

			skip = qfalse;
#ifdef QUICKTIME_BANNER
			// hack for quicktime ripped images
			if ( ( col > cols - 3 || row > rows - 36 ) ) {
				// filter this pixel out
				*( inpixel + 0 ) = 0;
				*( inpixel + 1 ) = 0;
				*( inpixel + 2 ) = 0;
				skip = qtrue;
			}
#endif

			if ( !skip ) {
				if (    ( *( inpixel + 0 ) > 20 )       // blue
						||  ( *( inpixel + 1 ) > 20 ) // green
						||  ( *( inpixel + 2 ) > 20 ) ) { // red

					if ( col < mins[0] ) {
						mins[0] = col;
					}
					if ( col > maxs[0] ) {
						maxs[0] = col;
					}
					if ( row < mins[1] ) {
						mins[1] = row;
					}
					if ( row > maxs[1] ) {
						maxs[1] = row;
					}

				} else {
					// filter this pixel out
					*( inpixel + 0 ) = 0;
					*( inpixel + 1 ) = 0;
					*( inpixel + 2 ) = 0;
				}
			}

#ifdef FUNNEL_HACK  // scale brightness down
			for ( i = 0; i < 3; i++ ) {
				alpha = *( inpixel + i );
				if ( ( alpha -= 20 ) < 0 ) {
					alpha = 0;
				}
				*( inpixel + i ) = alpha;
			}
#endif

			// set the alpha component
			alpha = *( inpixel + 0 ); // + *(inpixel + 1) + *(inpixel + 2);
			if ( *( inpixel + 1 ) > alpha ) {
				alpha = *( inpixel + 1 );
			}
			if ( *( inpixel + 2 ) > alpha ) {
				alpha = *( inpixel + 2 );
			}
			//alpha = (int)((float)alpha / 3.0);
			//alpha /= 3;
			if ( alpha > 255 ) {
				alpha = 255;
			}
			*( inpixel + 3 ) = (byte)alpha;
		}
	}

#ifdef RESIZE
	return qtrue;
#endif

	// convert it so that the center is the center of the image
	// this is used for some explosions
	/*
	for (i=0; i<2; i++) {
		if (i==0)	center = width;
		else		center = height;

		if ((*center/2 - mins[i]) > (maxs[i] - *center/2)) {
			maxs[i] = *center/2 + (*center/2 - mins[i]);
		} else {
			mins[i] = *center/2 - (maxs[i] - *center/2);
		}
	}
	*/

	// HACK for funnel
#ifdef FUNNEL_HACK
	mins[0] = 210;
	maxs[0] = 430;
	mins[1] = 0;
	maxs[1] = *height - 1;

	for ( i = 0; i < 2; i++ ) {
		diff[i] = maxs[i] - mins[i];
	}
#else

#ifndef RESIZE
	// apply the border
	for ( i = 0; i < 2; i++ ) {
		mins[i] -= border;
		if ( mins[i] < 0 ) {
			mins[i] = 0;
		}
		maxs[i] += border;
		if ( i == 0 ) {
			if ( maxs[i] > *width - 1 ) {
				maxs[i] = *width - 1;
			}
		} else {
			if ( maxs[i] > *height - 1 ) {
				maxs[i] = *height - 1;
			}
		}
	}

	// we have the mins/maxs, so work out the best square to crop to
	for ( i = 0; i < 2; i++ ) {
		diff[i] = maxs[i] - mins[i];
	}

	// widen the axis that has the smallest diff
	a = -1;
	if ( diff[1] > diff[0] ) {
		a = 0;
		max = *width - 1;
	} else if ( diff[0] > diff[1] ) {
		a = 1;
		max = *height - 1;
	}
	if ( a >= 0 ) {
		invalid = qfalse;
		while ( diff[a] < diff[!a] ) {
			if ( invalid ) {
				Com_Printf( "unable to find a good crop size\n" );
				return qfalse;
			}
			invalid = qtrue;
			if ( mins[a] > 0 ) {
				mins[a] -= 1;
				diff[a] = maxs[a] - mins[a];
				invalid = qfalse;
			}
			if ( ( diff[a] < diff[!a] ) && ( maxs[a] < max ) ) {
				maxs[a] += 1;
				diff[a] = maxs[a] - mins[a];
				invalid = qfalse;
			}
		}
	}

	// make sure it's bigger or equal to the last one
	for ( i = 0; i < 2; i++ ) {
		if ( ( maxs[i] - mins[i] ) < lastBox[i] ) {
			if ( i == 0 ) {
				center = width;
			} else { center = height;}

			maxs[i] = *center / 2 + ( lastBox[i] / 2 );
			mins[i] = maxs[i] - lastBox[i];
			diff[i] = lastBox[i];
		}
	}
#else
	for ( i = 0; i < 2; i++ ) {
		diff[i] = maxs[i] - mins[i];
		lastBox[i] = diff[i];
	}
#endif  // RESIZE
#endif  // FUNNEL_HACK

	temppic = ri.Z_Malloc( sizeof( unsigned int ) * diff[0] * diff[1] );
	outpixel = temppic;

	for ( row = mins[1]; row < maxs[1]; row++ )
	{
		inpixel = ( ( *pic ) + ( row * cols ) * 4 );
		inpixel += mins[0] * 4;

		for ( col = mins[0]; col < maxs[0]; col++ )
		{
			*outpixel++ = *( inpixel + 0 );   // blue
			*outpixel++ = *( inpixel + 1 );   // green
			*outpixel++ = *( inpixel + 2 );   // red
			*outpixel++ = *( inpixel + 3 );   // alpha

			inpixel += 4;
		}
	}

	// for some reason this causes memory drop, not worth investigating (dev command only)
	//ri.Free( *pic );

	*pic = temppic;

	*width = diff[0];
	*height = diff[1];

	return qtrue;
#else
	return qtrue;   // shutup the compiler
#endif
}


/*
===============
R_CropAndNumberImagesInDirectory
===============
*/
void    R_CropAndNumberImagesInDirectory( char *dir, char *ext, int maxWidth, int maxHeight, int withAlpha ) {
#ifdef CROPIMAGES_ENABLED
	char    **fileList;
	int numFiles, j;
#ifndef RESIZE
	int i;
#endif
	byte    *pic, *temppic;
	int width, height, newWidth, newHeight;
	char    *pch;
	int b,c,d,lastNumber;
	int lastBox[2] = {0,0};

	fileList = ri.FS_ListFiles( dir, ext, &numFiles );

	if ( !numFiles ) {
		ri.Printf( PRINT_ALL, "no '%s' files in directory '%s'\n", ext, dir );
		return;
	}

	ri.Printf( PRINT_ALL, "%i files found, beginning processing..\n", numFiles );

	for ( j = 0; j < numFiles; j++ ) {
		char filename[MAX_QPATH], outfilename[MAX_QPATH];

		if ( !Q_strncmp( fileList[j], "spr", 3 ) ) {
			continue;
		}

		Com_sprintf( filename, sizeof( filename ), "%s/%s", dir, fileList[j] );
		ri.Printf( PRINT_ALL, "...cropping '%s'.. ", filename );

		R_LoadImage( filename, &pic, &width, &height );
		if ( !pic ) {
			ri.Printf( PRINT_ALL, "error reading file, ignoring.\n" );
			continue;
		}

		// file has been read, crop it, resize it down to a power of 2, then save
		if ( !R_CropImage( filename, &pic, 6, &width, &height, lastBox ) ) {
			ri.Printf( PRINT_ALL, "unable to crop image.\n" );
			//ri.Free( pic );
			break;
		}
#ifndef RESIZE
		for ( i = 2; ( 1 << i ) <= maxWidth; i++ ) {
			if ( ( width < ( 1 << i ) ) && ( width > ( 1 << ( i - 1 ) ) ) ) {
				newWidth = ( 1 << ( i - 1 ) );
				if ( newWidth > maxWidth ) {
					newWidth = maxWidth;
				}
				newHeight = newWidth;
				temppic = ri.Z_Malloc( sizeof( unsigned int ) * newWidth * newHeight );
				ResampleTexture( (unsigned int *)pic, width, height, (unsigned int *)temppic, newWidth, newHeight );
				memcpy( pic, temppic, sizeof( unsigned int ) * newWidth * newHeight );
				ri.Free( temppic );
				width = height = newWidth;
				break;
			}
		}
		if ( width > maxWidth ) {
			// we need to force the scale downwards
			newWidth = maxWidth;
			newHeight = maxWidth;
			temppic = ri.Z_Malloc( sizeof( unsigned int ) * newWidth * newHeight );
			ResampleTexture( (unsigned int *)pic, width, height, (unsigned int *)temppic, newWidth, newHeight );
			memcpy( pic, temppic, sizeof( unsigned int ) * newWidth * newHeight );
			ri.Free( temppic );
			width = newWidth;
			height = newHeight;
		}
#else
		newWidth = maxWidth;
		newHeight = maxHeight;
		temppic = ri.Z_Malloc( sizeof( unsigned int ) * newWidth * newHeight );
		ResampleTexture( (unsigned int *)pic, width, height, (unsigned int *)temppic, newWidth, newHeight );
		memcpy( pic, temppic, sizeof( unsigned int ) * newWidth * newHeight );
		ri.Free( temppic );
		width = newWidth;
		height = newHeight;
#endif

		// set the new filename
		pch = strrchr( filename, '/' );
		*pch = '\0';
		lastNumber = j;
		b = lastNumber / 100;
		lastNumber -= b * 100;
		c = lastNumber / 10;
		lastNumber -= c * 10;
		d = lastNumber;
		Com_sprintf( outfilename, sizeof( outfilename ), "%s/spr%i%i%i.tga", filename, b, c, d );

		if ( withAlpha ) {
			SaveTGAAlpha( outfilename, &pic, width, height );
		} else {
			SaveTGA( outfilename, &pic, width, height );
		}

		// free the pixel data
		//ri.Free( pic );

		ri.Printf( PRINT_ALL, "done.\n" );
	}
#endif
}

/*
==============
R_CropImages_f
==============
*/
void R_CropImages_f( void ) {
#ifdef CROPIMAGES_ENABLED
	if ( ri.Cmd_Argc() < 5 ) {
		ri.Printf( PRINT_ALL, "syntax: cropimages <dir> <extension> <maxWidth> <maxHeight> <alpha 0/1>\neg: 'cropimages sprites/fire1 .tga 64 64 0'\n" );
		return;
	}
	R_CropAndNumberImagesInDirectory( ri.Cmd_Argv( 1 ), ri.Cmd_Argv( 2 ), atoi( ri.Cmd_Argv( 3 ) ), atoi( ri.Cmd_Argv( 4 ) ), atoi( ri.Cmd_Argv( 5 ) ) );
#else
	ri.Printf( PRINT_ALL, "This command has been disabled.\n" );
#endif
}
// done.

