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tr_image.c
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tr_image.c
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/*
===========================================================================
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"
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->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)
{
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;
case GL_RGBA4:
case GL_RGBA8:
case GL_RGBA:
format = "RGBA ";
// 4 bytes per pixel
estSize *= 4;
break;
case GL_LUMINANCE8:
case GL_LUMINANCE16:
case GL_LUMINANCE:
format = "L ";
// 1 byte per pixel?
break;
case GL_RGB5:
case GL_RGB8:
case GL_RGB:
format = "RGB ";
// 3 bytes per pixel?
estSize *= 3;
break;
case GL_LUMINANCE8_ALPHA8:
case GL_LUMINANCE16_ALPHA16:
case GL_LUMINANCE_ALPHA:
format = "LA ";
// 2 bytes per pixel?
estSize *= 2;
break;
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;
}
// 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[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);
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
===============
*/
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( 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)
{
if(r_texturebits->integer == 16)
internalFormat = GL_LUMINANCE8;
else if(r_texturebits->integer == 32)
internalFormat = GL_LUMINANCE16;
else
internalFormat = GL_LUMINANCE;
}
else
{
if ( glConfig.textureCompression == TC_S3TC_ARB )
{
internalFormat = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
}
else 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 = GL_RGB;
}
}
}
else if ( samples == 4 )
{
if(r_greyscale->integer)
{
if(r_texturebits->integer == 16)
internalFormat = GL_LUMINANCE8_ALPHA8;
else if(r_texturebits->integer == 32)
internalFormat = GL_LUMINANCE16_ALPHA16;
else
internalFormat = GL_LUMINANCE_ALPHA;
}
else
{
if ( r_texturebits->integer == 16 )
{
internalFormat = GL_RGBA4;
}
else if ( r_texturebits->integer == 32 )
{
internalFormat = GL_RGBA8;
}
else
{
internalFormat = GL_RGBA;
}
}
}
}
// 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)
{
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 );
}
/*
================
R_CreateImage
This is the only way any image_t are created
================
*/
image_t *R_CreateImage( const char *name, byte *pic, int width, int height,
imgType_t type, imgFlags_t flags, int internalFormat ) {
image_t *image;
qboolean isLightmap = qfalse;
long hash;
int glWrapClampMode;
if (strlen(name) >= MAX_QPATH ) {
ri.Error (ERR_DROP, "R_CreateImage: \"%s\" is too long", name);
}
if ( !strncmp( name, "*lightmap", 9 ) ) {
isLightmap = qtrue;
}
if ( tr.numImages == MAX_DRAWIMAGES ) {
ri.Error( ERR_DROP, "R_CreateImage: MAX_DRAWIMAGES hit");
}
image = tr.images[tr.numImages] = ri.Hunk_Alloc( sizeof( image_t ), h_low );
image->texnum = 1024 + tr.numImages;
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,
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 );
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;
return image;
}
//===================================================================
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;