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cnq3/code/renderer/tr_image.cpp

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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"
#include <setjmp.h>
#if defined (_MSC_VER)
# pragma warning (disable: 4611) // setjmp and C++ destructors
#endif
#define IMAGE_HASH_SIZE 1024
static image_t* hashTable[IMAGE_HASH_SIZE];
static byte s_intensitytable[256];
static int gl_filter_min = GL_LINEAR_MIPMAP_NEAREST;
static int gl_filter_max = GL_LINEAR;
typedef struct {
const char* name;
int minimize, maximize;
} textureMode_t;
static const 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 },
{ 0 }
};
void GL_TextureMode( const char* string )
{
int i;
for (i = 0; modes[i].name; ++i) {
if ( !Q_stricmp( modes[i].name, string ) ) {
break;
}
}
if (!modes[i].name) {
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++ ) {
const image_t* glt = tr.images[ i ];
if ( !(glt->flags & IMG_NOMIPMAP) ) {
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 );
}
}
}
void R_ImageList_f( void )
{
int i, vram = 0;
ri.Printf( PRINT_ALL, "\nwide high MPI W format name\n" );
for ( i = 0; i < tr.numImages; ++i ) {
const image_t* image = tr.images[i];
GL_Bind( image );
GLint compressed;
qglGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_ARB, &compressed );
if (compressed)
qglGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB, &compressed );
else
compressed = image->width * image->height;
if ( !(image->flags & IMG_NOMIPMAP) && (image->width > 1) && (image->height > 1) )
vram += compressed * 1.33f; // will overestimate, but that's what we want anyway
vram += compressed;
ri.Printf( PRINT_ALL, "%4i %4i %c%c%c ",
image->width, image->height,
(image->flags & IMG_NOMIPMAP) ? ' ' : 'M',
(image->flags & IMG_NOPICMIP) ? ' ' : 'P',
(image->flags & IMG_NOIMANIP) ? ' ' : 'I'
);
switch ( image->wrapClampMode ) {
case GL_REPEAT: ri.Printf( PRINT_ALL, "R " ); break;
case GL_CLAMP: ri.Printf( PRINT_ALL, "C " ); break;
case GL_CLAMP_TO_EDGE: ri.Printf( PRINT_ALL, "E " ); break;
default: ri.Printf( PRINT_ALL, "? " ); break;
}
switch ( image->format ) {
case GL_RGB: ri.Printf( PRINT_ALL, "RGB " ); break;
case GL_RGB5: ri.Printf( PRINT_ALL, "RGB5 " ); break;
case GL_RGB8: ri.Printf( PRINT_ALL, "RGB8 " ); break;
case GL_RGBA: ri.Printf( PRINT_ALL, "RGBA " ); break;
case GL_RGBA4: ri.Printf( PRINT_ALL, "RGBA4 " ); break;
case GL_RGBA8: ri.Printf( PRINT_ALL, "RGBA8 " ); break;
case GL_LUMINANCE_ALPHA: ri.Printf( PRINT_ALL, "L8A8 " ); break;
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: ri.Printf( PRINT_ALL, "DXT1 " ); break;
default:
ri.Printf( PRINT_ALL, "%5i ", image->format );
break;
}
ri.Printf( PRINT_ALL, " %s\n", image->name );
}
ri.Printf( PRINT_ALL, "---------\n" );
ri.Printf( PRINT_ALL, "%i images\n", tr.numImages );
// just assume/pretend that everything is 4-component
ri.Printf( PRINT_ALL, "Estimated VRAM use: %iMB\n\n", vram / (1024 * 1024 / 4) );
}
///////////////////////////////////////////////////////////////
/*
================
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;
}
}
}
// scale up the pixel values in a texture to increase the lighting range
static void R_LightScaleTexture( byte* p, int width, int height )
{
const int pixels = width * height;
for (int i = 0 ; i < pixels; ++i) {
p[0] = s_intensitytable[p[0]];
p[1] = s_intensitytable[p[1]];
p[2] = s_intensitytable[p[2]];
p += 4;
}
}
// operates in place, quartering the size of the texture - proper linear filter
static void R_MipMap( unsigned* in, int inWidth, int inHeight )
{
int i, j, k;
byte *outpix;
int total;
int outWidth = inWidth >> 1;
int outHeight = inHeight >> 1;
unsigned* temp = (unsigned*)ri.Hunk_AllocateTempMemory( outWidth * outHeight * 4 );
int inWidthMask = inWidth - 1;
int 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 );
}
// apply a color blend over a set of pixels - used for r_colorMipLevels
static void R_BlendOverTexture( byte *data, int pixelCount, const byte blend[4] )
{
int premult[3];
int inverseAlpha = 255 - blend[3];
premult[0] = blend[0] * blend[3];
premult[1] = blend[1] * blend[3];
premult[2] = blend[2] * blend[3];
for (int 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;
}
}
static const 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},
};
// note that the "32" here is for the image's STRIDE - it has nothing to do with the actual COMPONENTS
static void Upload32( image_t* image, unsigned int* data )
{
int scaled_width, scaled_height;
// convert to exact power of 2 sizes
//
for ( scaled_width = 1; scaled_width < image->width; scaled_width <<= 1 )
;
for ( scaled_height = 1; scaled_height < image->height; scaled_height <<=1 )
;
if ( r_roundImagesDown->integer && scaled_width > image->width )
scaled_width >>= 1;
if ( r_roundImagesDown->integer && scaled_height > image->height )
scaled_height >>= 1;
RI_AutoPtr pResampled;
if ( scaled_width != image->width || scaled_height != image->height ) {
pResampled.Alloc( scaled_width * scaled_height * 4 );
ResampleTexture( data, image->width, image->height, pResampled.Get<unsigned int>(), scaled_width, scaled_height );
data = pResampled.Get<unsigned int>();
image->width = scaled_width;
image->height = scaled_height;
}
// perform optional picmip operation
if ( !(image->flags & IMG_NOPICMIP) ) {
scaled_width >>= r_picmip->integer;
scaled_height >>= r_picmip->integer;
}
// clamp to minimum size
scaled_width = max( scaled_width, 1 );
scaled_height = max( 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 > glInfo.maxTextureSize || scaled_height > glInfo.maxTextureSize ) {
scaled_width >>= 1;
scaled_height >>= 1;
}
// validate and/or override the internal format
switch (image->format) {
case GL_RGB:
image->format = GL_RGB8;
break;
case GL_RGBA:
image->format = GL_RGBA8;
break;
case GL_LUMINANCE_ALPHA:
break;
default:
ri.Error( ERR_DROP, "Upload32: Invalid format %d\n", image->format );
}
RI_AutoPtr pScaled( sizeof(unsigned) * scaled_width * scaled_height );
// copy or resample data as appropriate for first MIP level
if ( ( scaled_width == image->width ) && ( scaled_height == image->height ) ) {
if ( image->flags & IMG_NOMIPMAP ) {
qglTexImage2D( GL_TEXTURE_2D, 0, image->format, image->width, image->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data );
goto done;
}
Com_Memcpy( pScaled, data, image->width * image->height * 4 );
}
else
{
// use the normal mip-mapping function to go down from here
while ( image->width > scaled_width || image->height > scaled_height ) {
R_MipMap( (unsigned*)data, image->width, image->height );
image->width = max( image->width >> 1, 1 );
image->height = max( image->height >> 1, 1 );
}
Com_Memcpy( pScaled, data, image->width * image->height * 4 );
}
if ( !(image->flags & IMG_NOIMANIP) )
R_LightScaleTexture( pScaled.Get<byte>(), scaled_width, scaled_height );
qglTexImage2D( GL_TEXTURE_2D, 0, image->format, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pScaled );
if ( !(image->flags & IMG_NOMIPMAP) )
{
int miplevel = 0;
while (scaled_width > 1 || scaled_height > 1)
{
R_MipMap( pScaled.Get<unsigned>(), scaled_width, scaled_height );
scaled_width = max( scaled_width >> 1, 1 );
scaled_height = max( scaled_height >> 1, 1 );
++miplevel;
if ( r_colorMipLevels->integer )
R_BlendOverTexture( pScaled, scaled_width * scaled_height, mipBlendColors[miplevel] );
qglTexImage2D( GL_TEXTURE_2D, miplevel, image->format, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pScaled );
}
}
done:
qglGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, (GLint*)&image->format );
if ( glInfo.maxAnisotropy >= 2 && r_ext_max_anisotropy->integer >= 2 )
qglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, min( r_ext_max_anisotropy->integer, glInfo.maxAnisotropy ) );
if ( image->flags & IMG_NOMIPMAP ) {
qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
} else {
qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, gl_filter_min );
qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, gl_filter_max );
}
GL_CheckErrors();
}
// this is the only way any image_t are created
// !!! i'm pretty sure this DOESN'T work correctly for non-POT images
image_t* R_CreateImage( const char* name, byte* pic, int width, int height, GLenum format, int flags, int glWrapClampMode )
{
if (strlen(name) >= MAX_QPATH)
ri.Error( ERR_DROP, "R_CreateImage: \"%s\" is too long\n", name );
if ( tr.numImages == MAX_DRAWIMAGES )
ri.Error( ERR_DROP, "R_CreateImage: MAX_DRAWIMAGES hit\n" );
image_t* image = tr.images[tr.numImages] = RI_New<image_t>();
qglGenTextures( 1, &image->texnum );
tr.numImages++;
strcpy( image->name, name );
image->format = format;
image->flags = flags;
image->width = width;
image->height = height;
image->wrapClampMode = glWrapClampMode;
GL_Bind( image );
Upload32( image, (unsigned int*)pic );
qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, glWrapClampMode );
qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, glWrapClampMode );
// KHB there are times we have no interest in naming an image at all (notably, font glyphs)
// but atm the rest of the system is too dependent on everything being named
//if (name) {
int hash = Q_FileHash(name, IMAGE_HASH_SIZE);
image->next = hashTable[hash];
hashTable[hash] = image;
//}
return image;
}
///////////////////////////////////////////////////////////////
typedef struct {
jmp_buf jumpBuffer;
const char* fileName;
qbool load;
} engineJPEGInfo_t;
// The only memory allocation function pointers we can override are the ones exposed in jpeg_memory_mgr.
// The problem is that it's the wrong layer for us: we want to replace malloc and free,
// not change how the pooling of allocations works.
// We are therefore re-implementing jmemnobs.c to use the engine's allocator.
extern "C"
{
#define JPEG_INTERNALS
#include "../libjpeg-turbo/jinclude.h"
#include "../libjpeg-turbo/jpeglib.h"
#include "../libjpeg-turbo/jmemsys.h"
void* jpeg_get_small( j_common_ptr cinfo, size_t sizeofobject ) { return (void*)ri.Malloc(sizeofobject); }
void jpeg_free_small( j_common_ptr cinfo, void* object, size_t sizeofobject ) { ri.Free(object); }
void* jpeg_get_large( j_common_ptr cinfo, size_t sizeofobject ) { return jpeg_get_small( cinfo, sizeofobject ); }
void jpeg_free_large( j_common_ptr cinfo, void* object, size_t sizeofobject ) { jpeg_free_small( cinfo, object, sizeofobject ); }
size_t jpeg_mem_available( j_common_ptr cinfo, size_t min_bytes_needed, size_t max_bytes_needed, size_t already_allocated ) { return max_bytes_needed; }
void jpeg_open_backing_store( j_common_ptr cinfo, backing_store_ptr info, long total_bytes_needed ) { ERREXIT(cinfo, JERR_NO_BACKING_STORE); }
long jpeg_mem_init( j_common_ptr cinfo) { return 0; }
void jpeg_mem_term( j_common_ptr cinfo) {}
void error_exit( j_common_ptr cinfo )
{
char buffer[JMSG_LENGTH_MAX];
(*cinfo->err->format_message)(cinfo, buffer);
engineJPEGInfo_t* const extra = (engineJPEGInfo_t*)cinfo->client_data;
ri.Printf(PRINT_WARNING, "libjpeg-turbo: couldn't %s %s: %s\n", extra->load ? "load" : "save", extra->fileName, buffer);
jpeg_destroy(cinfo);
longjmp(extra->jumpBuffer, -1);
}
void output_message( j_common_ptr cinfo )
{
char buffer[JMSG_LENGTH_MAX];
(*cinfo->err->format_message)(cinfo, buffer);
const engineJPEGInfo_t* const extra = (const engineJPEGInfo_t*)cinfo->client_data;
ri.Printf(PRINT_ALL, "libjpeg-turbo: while %s %s: %s\n", extra->load ? "loading" : "saving", extra->fileName, buffer);
}
};
static qbool LoadJPG( const char* fileName, byte* buffer, int len, byte** pic, int* w, int* h, GLenum* format )
{
jpeg_decompress_struct cinfo;
jpeg_error_mgr jerr;
engineJPEGInfo_t extra;
if (setjmp(extra.jumpBuffer))
return qfalse;
extra.load = qtrue;
extra.fileName = fileName;
cinfo.err = jpeg_std_error( &jerr );
cinfo.err->error_exit = &error_exit;
cinfo.err->output_message = &output_message;
cinfo.client_data = &extra;
jpeg_create_decompress( &cinfo );
jpeg_mem_src( &cinfo, buffer, len );
jpeg_read_header( &cinfo, TRUE );
jpeg_start_decompress( &cinfo );
const unsigned numBytes = cinfo.output_width * cinfo.output_height * 4;
*pic = (byte*)ri.Malloc(numBytes);
*w = cinfo.output_width;
*h = cinfo.output_height;
// We set JCS_EXT_RGBA to instruct libjpeg-turbo to always
// write the alpha value as 255.
cinfo.out_color_space = JCS_EXT_RGBA;
cinfo.output_components = 4;
// go for speed
cinfo.dither_mode = JDITHER_NONE;
cinfo.dct_method = JDCT_FASTEST;
cinfo.do_fancy_upsampling = FALSE;
const unsigned rowStride = cinfo.output_width * 4;
JSAMPROW rowPointer = *pic;
while (cinfo.output_scanline < cinfo.output_height) {
jpeg_read_scanlines( &cinfo, &rowPointer, 1 );
rowPointer += rowStride;
}
jpeg_finish_decompress( &cinfo );
jpeg_destroy_decompress( &cinfo );
*format = GL_RGB;
return qtrue;
}
int SaveJPGToBuffer( byte* out, int quality, int image_width, int image_height, byte* image_buffer )
{
static const char* fileName = "memory buffer";
jpeg_compress_struct cinfo;
jpeg_error_mgr jerr;
engineJPEGInfo_t extra;
if (setjmp(extra.jumpBuffer))
return qfalse;
extra.load = qfalse;
extra.fileName = fileName;
cinfo.err = jpeg_std_error( &jerr );
cinfo.err->error_exit = &error_exit;
cinfo.err->output_message = &output_message;
cinfo.client_data = &extra;
jpeg_create_compress( &cinfo );
// jpeg_mem_dest only calls malloc if both outSize and outBuffer are 0
unsigned long outSize = image_width * image_height * 4;
unsigned char* outBuffer = out;
jpeg_mem_dest( &cinfo, &outBuffer, &outSize );
cinfo.image_width = image_width;
cinfo.image_height = image_height;
cinfo.input_components = 4;
cinfo.in_color_space = JCS_EXT_RGBA;
jpeg_set_defaults( &cinfo );
jpeg_set_quality( &cinfo, quality, TRUE );
jpeg_start_compress( &cinfo, TRUE );
const unsigned rowStride = image_width * 4;
JSAMPROW rowPointer = image_buffer + (cinfo.image_height - 1) * rowStride;
while (cinfo.next_scanline < cinfo.image_height) {
jpeg_write_scanlines( &cinfo, &rowPointer, 1 );
rowPointer -= rowStride;
}
jpeg_finish_compress( &cinfo );
const int csize = (int)(cinfo.dest->next_output_byte - outBuffer);
jpeg_destroy_compress( &cinfo );
return csize;
}
///////////////////////////////////////////////////////////////
extern qbool LoadSTB( const char* fileName, byte* buffer, int len, byte** pic, int* w, int* h, GLenum* format );
typedef qbool (*imageLoaderFunc)( const char* fileName, byte* buffer, int len, byte** pic, int* w, int* h, GLenum* format );
typedef struct {
const char* extension;
imageLoaderFunc function;
} imageLoader_t;
static const imageLoader_t imageLoaders[] = {
{ ".jpg", &LoadJPG },
{ ".tga", &LoadSTB },
{ ".png", &LoadSTB },
{ ".jpeg", &LoadJPG }
};
static void R_LoadImage( const char* name, byte** pic, int* w, int* h, GLenum* format )
{
*pic = NULL;
*w = 0;
*h = 0;
const int loaderCount = ARRAY_LEN( imageLoaders );
char altName[MAX_QPATH];
byte* buffer;
int bufferSize = ri.FS_ReadFile( name, (void**)&buffer );
if ( buffer == NULL ) {
const char* lastDot = strrchr( name, '.' );
const int nameLength = lastDot != NULL ? (int)(lastDot - name) : (int)strlen( name );
if ( nameLength >= MAX_QPATH )
return;
for ( int i = 0; i < loaderCount; ++i ) {
memcpy( altName, name, nameLength );
altName[nameLength] = '\0';
Q_strcat( altName, sizeof(altName), imageLoaders[i].extension );
bufferSize = ri.FS_ReadFile( altName, (void**)&buffer );
if ( buffer != NULL ) {
name = altName;
break;
}
}
if ( buffer == NULL )
return;
}
const int nameLength = (int)strlen( name );
for ( int i = 0; i < loaderCount; ++i ) {
const int extLength = (int)strlen( imageLoaders[i].extension );
if ( extLength < nameLength &&
Q_stricmp(name + nameLength - extLength, imageLoaders[i].extension) == 0 ) {
(*imageLoaders[i].function)( name, buffer, bufferSize, pic, w, h, format );
break;
}
}
ri.FS_FreeFile( buffer );
}
struct forcedLoadImage_t {
const char* mapName;
const char* shaderName;
int shaderNameHash;
};
// map-specific fixes for textures that are used with different (incompatible) settings
static const forcedLoadImage_t g_forcedLoadImages[] = {
{ "ct3ctf1", "textures/ct3ctf1/grate_02.tga", 716 }
};
// finds or loads the given image - returns NULL if it fails, not a default image
const image_t* R_FindImageFile( const char* name, int flags, int glWrapClampMode )
{
if ( !name )
return NULL;
qbool forcedLoad = qfalse;
const int hash = Q_FileHash( name, IMAGE_HASH_SIZE );
const int forcedLoadImageCount = ARRAY_LEN( g_forcedLoadImages );
for ( int i = 0; i < forcedLoadImageCount; ++i ) {
const forcedLoadImage_t* const fli = g_forcedLoadImages + i;
if ( hash == fli->shaderNameHash &&
strcmp( R_GetMapName(), fli->mapName ) == 0 &&
strcmp( name, fli->shaderName ) == 0 )
forcedLoad = qtrue;
}
// see if the image is already loaded
//
if ( !forcedLoad ) {
image_t* image;
for ( image = hashTable[hash]; image; image=image->next ) {
if ( strcmp( name, image->name ) )
continue;
if ( strcmp( name, "*white" ) )
return image;
// since this WASN'T enforced as an error, half the shaders out there (including most of id's)
// have been getting it wrong for years
// the white image can be used with any set of parms, but other mismatches are errors
if ( (image->flags & IMG_NOMIPMAP) != (flags & IMG_NOMIPMAP) ) {
ri.Printf( PRINT_DEVELOPER, "WARNING: reused image %s with mixed nomipmap settings\n", name );
}
if ( (image->flags & IMG_NOPICMIP) != (image->flags & IMG_NOPICMIP) ) {
ri.Printf( PRINT_DEVELOPER, "WARNING: reused image %s with mixed nomipmaps settings\n", name );
}
if ( image->wrapClampMode != glWrapClampMode ) {
ri.Printf( PRINT_DEVELOPER, "WARNING: reused image %s with mixed clamp settings (map vs clampMap)\n", name );
}
return image;
}
}
// load the pic from disk
//
byte* pic;
int width, height;
GLenum format;
R_LoadImage( name, &pic, &width, &height, &format );
if ( !pic )
return NULL;
image_t* const image = R_CreateImage( name, pic, width, height, format, flags, glWrapClampMode );
ri.Free( pic );
return image;
}
void R_InitFogTable()
{
const float exp = 0.5;
for (int i = 0; i < FOG_TABLE_SIZE; ++i) {
tr.fogTable[i] = pow( (float)i/(FOG_TABLE_SIZE-1), exp );
}
}
/*
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 )
{
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;
}
return tr.fogTable[ (int)(s * (FOG_TABLE_SIZE-1)) ];
}
static void R_CreateFogImage()
{
const int FOG_S = 256;
const int FOG_T = 32;
RI_AutoPtr ap( FOG_S * FOG_T * 4 );
byte* p = ap;
// S is distance, T is depth
for (int x = 0; x < FOG_S; ++x) {
for (int y = 0; y < FOG_T; ++y) {
float d = R_FogFactor( ( x + 0.5f ) / FOG_S, ( y + 0.5f ) / FOG_T );
p[(y*FOG_S+x)*4+0] = p[(y*FOG_S+x)*4+1] = p[(y*FOG_S+x)*4+2] = 255;
p[(y*FOG_S+x)*4+3] = 255*d;
}
}
tr.fogImage = R_CreateImage( "*fog", p, FOG_S, FOG_T, GL_RGBA, IMG_NOPICMIP, GL_CLAMP_TO_EDGE );
qglTexParameterfv( GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, colorWhite );
}
static void R_CreateDefaultImage()
{
const int DEFAULT_SIZE = 16;
byte data[DEFAULT_SIZE][DEFAULT_SIZE][4];
// the default image is a box showing increasing s and t
Com_Memset( data, 32, sizeof( data ) );
for ( int i = 0; i < DEFAULT_SIZE; ++i ) {
byte b = (byte)( 64 + (128 * i / DEFAULT_SIZE) );
data[0][i][0] = b;
data[0][i][3] = 255;
data[i][0][1] = b;
data[i][0][3] = 255;
data[i][i][0] = data[i][i][1] = b;
data[i][i][3] = 255;
}
tr.defaultImage = R_CreateImage( "*default", (byte*)data, DEFAULT_SIZE, DEFAULT_SIZE, GL_RGBA, IMG_NOPICMIP, GL_REPEAT );
}
static void R_CreateBuiltinImages()
{
int i;
byte data[4];
R_CreateDefaultImage();
// we use a solid white image instead of disabling texturing
Com_Memset( data, 255, 4 );
tr.whiteImage = R_CreateImage( "*white", data, 1, 1, GL_RGBA, IMG_NOMIPMAP, GL_REPEAT );
// scratchimages usually used for cinematic drawing (signal-quality effects)
// these are just placeholders: RE_StretchRaw will regenerate them when it wants them
for (i = 0; i < 16; ++i) // MAX_VIDEO_HANDLES
tr.scratchImage[i] = R_CreateImage( "*scratch", data, 1, 1, GL_RGBA, IMG_NOMIPMAP | IMG_NOPICMIP, GL_CLAMP );
R_CreateFogImage();
}
void R_SetColorMappings()
{
tr.identityLight = 1.0f / r_brightness->value;
tr.identityLightByte = (int)( 255.0f * tr.identityLight );
for (int i = 0; i < 256; ++i) {
s_intensitytable[i] = (byte)min( r_intensity->value * i, 255.0f );
}
}
void R_InitImages()
{
Com_Memset( hashTable, 0, sizeof(hashTable) );
R_SetColorMappings(); // build brightness translation tables
R_CreateBuiltinImages(); // create default textures (white, fog, etc)
}
void R_DeleteTextures()
{
for ( int i = 0; i < tr.numImages; ++i )
qglDeleteTextures( 1, &tr.images[i]->texnum );
tr.numImages = 0;
Com_Memset( tr.images, 0, sizeof( tr.images ) );
Com_Memset( glState.texID, 0, sizeof( glState.texID ) );
for ( int i = MAX_TMUS - 1; i >= 0; --i ) {
GL_SelectTexture( i );
qglBindTexture( GL_TEXTURE_2D, 0 );
}
}
/*
============================================================================
SKINS
============================================================================
*/
// unfortunatly, skin files aren't compatible with our normal parsing rules. oops :/
static const char* CommaParse( const char** data )
{
static char com_token[MAX_TOKEN_CHARS];
int c = 0;
const char* p = *data;
while (*p && (*p < 32))
++p;
while ((*p > 32) && (*p != ',') && (c < MAX_TOKEN_CHARS-1))
com_token[c++] = *p++;
*data = p;
com_token[c] = 0;
return com_token;
}
qhandle_t RE_RegisterSkin( const char* name )
{
if (!name || !name[0] || (strlen(name) >= MAX_QPATH))
ri.Error( ERR_DROP, "RE_RegisterSkin: invalid name [%s]\n", name ? name : "NULL" );
skin_t* skin;
qhandle_t hSkin;
// see if the skin is already loaded
for (hSkin = 1; hSkin < tr.numSkins; ++hSkin) {
skin = tr.skins[hSkin];
if ( !Q_stricmp( skin->name, name ) ) {
return (skin->numSurfaces ? hSkin : 0);
}
}
// 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_New<skin_t>();
tr.skins[hSkin] = skin;
Q_strncpyz( skin->name, name, sizeof( skin->name ) );
skin->numSurfaces = 0;
// make sure the render thread is stopped
// KHB why? we're not uploading anything... R_SyncRenderThread();
// if not a .skin file, load as a single shader
if ( Q_stricmpn( name + strlen( name ) - 5, ".skin", 6 ) ) {
skin->numSurfaces = 1;
skin->surfaces[0] = RI_New<skinSurface_t>();
skin->surfaces[0]->shader = R_FindShader( name, LIGHTMAP_NONE, qtrue );
return hSkin;
}
char* text;
// load and parse the skin file
ri.FS_ReadFile( name, (void **)&text );
if (!text)
return 0;
const char* token;
const char* p = text;
char surfName[MAX_QPATH];
while (p && *p) {
// get surface name
token = CommaParse( &p );
Q_strncpyz( surfName, token, sizeof( surfName ) );
if ( !token[0] )
break;
// lowercase the surface name so skin compares are faster
Q_strlwr( surfName );
if (*p == ',')
++p;
if ( strstr( token, "tag_" ) )
continue;
// parse the shader name
token = CommaParse( &p );
skinSurface_t* surf = skin->surfaces[ skin->numSurfaces ] = RI_New<skinSurface_t>();
Q_strncpyz( surf->name, surfName, sizeof( surf->name ) );
surf->shader = R_FindShader( token, LIGHTMAP_NONE, qtrue );
skin->numSurfaces++;
}
ri.FS_FreeFile( text );
return (skin->numSurfaces ? hSkin : 0); // never let a skin have 0 shaders
}
void R_InitSkins()
{
tr.numSkins = 1;
// make the default skin have all default shaders
tr.skins[0] = RI_New<skin_t>();
tr.skins[0]->numSurfaces = 1;
tr.skins[0]->surfaces[0] = RI_New<skinSurface_t>();
tr.skins[0]->surfaces[0]->shader = tr.defaultShader;
Q_strncpyz( tr.skins[0]->name, "<default skin>", sizeof( tr.skins[0]->name ) );
}
const skin_t* R_GetSkinByHandle( qhandle_t hSkin )
{
return ((hSkin > 0) && (hSkin < tr.numSkins) ? tr.skins[hSkin] : tr.skins[0]);
}
void R_SkinList_f( void )
{
ri.Printf( PRINT_ALL, "------------------\n" );
for (int i = 0; i < tr.numSkins; ++i) {
const skin_t* skin = tr.skins[i];
ri.Printf( PRINT_ALL, "%3i:%s\n", i, skin->name );
for (int 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" );
}
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