/*
* Mesa 3-D graphics library
- * Version: 6.1
+ * Version: 6.5.2
*
- * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* GL_EXT_texture_compression_s3tc support.
*/
+#ifndef USE_EXTERNAL_DXTN_LIB
+#define USE_EXTERNAL_DXTN_LIB 0
+#endif
#include "glheader.h"
#include "imports.h"
#include "texformat.h"
#include "texstore.h"
+#if USE_EXTERNAL_DXTN_LIB && !defined(__MINGW32__)
+#include <dlfcn.h>
+#endif
+
+#ifdef __MINGW32__
+#define DXTN_LIBNAME "dxtn.dll"
+#define RTLD_LAZY 0
+#define RTLD_GLOBAL 0
+#elif defined(__DJGPP__)
+#define DXTN_LIBNAME "dxtn.dxe"
+#else
+#define DXTN_LIBNAME "libtxc_dxtn.so"
+#endif
+
+
+typedef void (*dxtFetchTexelFuncExt)( GLint srcRowstride, GLubyte *pixdata, GLint col, GLint row, GLvoid *texelOut );
+
+dxtFetchTexelFuncExt fetch_ext_rgb_dxt1 = NULL;
+dxtFetchTexelFuncExt fetch_ext_rgba_dxt1 = NULL;
+dxtFetchTexelFuncExt fetch_ext_rgba_dxt3 = NULL;
+dxtFetchTexelFuncExt fetch_ext_rgba_dxt5 = NULL;
+
+typedef void (*dxtCompressTexFuncExt)(GLint srccomps, GLint width,
+ GLint height, const GLchan *srcPixData,
+ GLenum destformat, GLubyte *dest,
+ GLint dstRowStride);
+
+static dxtCompressTexFuncExt ext_tx_compress_dxtn = NULL;
+
+static void *dxtlibhandle = NULL;
+
+
+typedef void (*GenericFunc)(void);
+
+
+/**
+ * Wrapper for dlopen().
+ * XXX Probably move this and the following wrappers into imports.h someday.
+ */
+static void *
+_mesa_dlopen(const char *libname, int flags)
+{
+#if USE_EXTERNAL_DXTN_LIB
+#ifdef __MINGW32__
+ return LoadLibrary(libname);
+#else
+ return dlopen(libname, flags);
+#endif
+#else
+ return (GenericFunc) NULL;
+#endif /* USE_EXTERNAL_DXTN_LIB */
+}
+
+
+/**
+ * Wrapper for dlsym() that does a cast to a generic function type,
+ * rather than a void *. This reduces the number of warnings that are
+ * generated.
+ */
+static GenericFunc
+_mesa_dlsym(void *handle, const char *fname)
+{
+#if USE_EXTERNAL_DXTN_LIB
+#ifdef __MINGW32__
+ return (GenericFunc) GetProcAddress(handle, fname);
+#elif defined(__DJGPP__)
+ /* need '_' prefix on symbol names */
+ char fname2[1000];
+ fname2[0] = '_';
+ _mesa_strncpy(fname2 + 1, fname, 998);
+ fname2[999] = 0;
+ return (GenericFunc) dlsym(handle, fname2);
+#else
+ return (GenericFunc) dlsym(handle, fname);
+#endif
+#else
+ return (GenericFunc) NULL;
+#endif /* USE_EXTERNAL_DXTN_LIB */
+}
+
+
+/**
+ * Wrapper for dlclose().
+ */
+static void
+_mesa_dlclose(void *handle)
+{
+#if USE_EXTERNAL_DXTN_LIB
+#ifdef __MINGW32__
+ FreeLibrary(handle);
+#else
+ dlclose(handle);
+#endif
+#endif
+}
+
void
_mesa_init_texture_s3tc( GLcontext *ctx )
{
/* called during context initialization */
+ ctx->Mesa_DXTn = GL_FALSE;
+#if USE_EXTERNAL_DXTN_LIB
+ if (!dxtlibhandle) {
+ dxtlibhandle = _mesa_dlopen(DXTN_LIBNAME, RTLD_LAZY | RTLD_GLOBAL);
+ if (!dxtlibhandle) {
+ _mesa_warning(ctx, "couldn't open " DXTN_LIBNAME ", software DXTn "
+ "compression/decompression unavailable");
+ }
+ else {
+ /* the fetch functions are not per context! Might be problematic... */
+ fetch_ext_rgb_dxt1 = (dxtFetchTexelFuncExt)
+ _mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgb_dxt1");
+ fetch_ext_rgba_dxt1 = (dxtFetchTexelFuncExt)
+ _mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt1");
+ fetch_ext_rgba_dxt3 = (dxtFetchTexelFuncExt)
+ _mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt3");
+ fetch_ext_rgba_dxt5 = (dxtFetchTexelFuncExt)
+ _mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt5");
+ ext_tx_compress_dxtn = (dxtCompressTexFuncExt)
+ _mesa_dlsym(dxtlibhandle, "tx_compress_dxtn");
+
+ if (!fetch_ext_rgb_dxt1 ||
+ !fetch_ext_rgba_dxt1 ||
+ !fetch_ext_rgba_dxt3 ||
+ !fetch_ext_rgba_dxt5 ||
+ !ext_tx_compress_dxtn) {
+ _mesa_warning(ctx, "couldn't reference all symbols in "
+ DXTN_LIBNAME ", software DXTn compression/decompression "
+ "unavailable");
+ fetch_ext_rgb_dxt1 = NULL;
+ fetch_ext_rgba_dxt1 = NULL;
+ fetch_ext_rgba_dxt3 = NULL;
+ fetch_ext_rgba_dxt5 = NULL;
+ ext_tx_compress_dxtn = NULL;
+ _mesa_dlclose(dxtlibhandle);
+ dxtlibhandle = NULL;
+ }
+ }
+ }
+ if (dxtlibhandle) {
+ ctx->Mesa_DXTn = GL_TRUE;
+ _mesa_warning(ctx, "software DXTn compression/decompression available");
+ }
+#else
+ (void) ctx;
+#endif
}
-
/**
* Called via TexFormat->StoreImage to store an RGB_DXT1 texture.
*/
static GLboolean
-texstore_rgb_dxt1(STORE_PARAMS)
+texstore_rgb_dxt1(TEXSTORE_PARAMS)
{
const GLchan *pixels;
GLint srcRowStride;
ASSERT(dstXoffset % 4 == 0);
ASSERT(dstYoffset % 4 == 0);
ASSERT(dstZoffset % 4 == 0);
+ (void) dstZoffset;
+ (void) dstImageOffsets;
if (srcFormat != GL_RGB ||
srcType != CHAN_TYPE ||
}
dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
- GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
+ dstFormat->MesaFormat,
texWidth, (GLubyte *) dstAddr);
-#if 0
- compress_dxt1(ctx, srcWidth, srcHeight, srcFormat, pixels, srcRowStride,
- dst, dstRowStride);
-#endif
+ if (ext_tx_compress_dxtn) {
+ (*ext_tx_compress_dxtn)(3, srcWidth, srcHeight, pixels,
+ GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
+ dst, dstRowStride);
+ }
+ else {
+ _mesa_problem(ctx, "external dxt library not available");
+ }
if (tempImage)
_mesa_free((void *) tempImage);
* Called via TexFormat->StoreImage to store an RGBA_DXT1 texture.
*/
static GLboolean
-texstore_rgba_dxt1(STORE_PARAMS)
+texstore_rgba_dxt1(TEXSTORE_PARAMS)
{
const GLchan *pixels;
GLint srcRowStride;
ASSERT(dstXoffset % 4 == 0);
ASSERT(dstYoffset % 4 == 0);
ASSERT(dstZoffset % 4 == 0);
+ (void) dstZoffset;
+ (void) dstImageOffsets;
if (srcFormat != GL_RGBA ||
srcType != CHAN_TYPE ||
}
dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
- GL_COMPRESSED_RGBA_S3TC_DXT1_EXT,
+ dstFormat->MesaFormat,
texWidth, (GLubyte *) dstAddr);
-#if 0
- compress_dxt1(ctx, srcWidth, srcHeight, srcFormat, pixels, srcRowStride,
- dst, dstRowStride);
-#endif
+ if (ext_tx_compress_dxtn) {
+ (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels,
+ GL_COMPRESSED_RGBA_S3TC_DXT1_EXT,
+ dst, dstRowStride);
+ }
+ else {
+ _mesa_problem(ctx, "external dxt library not available");
+ }
+
if (tempImage)
_mesa_free((void*) tempImage);
* Called via TexFormat->StoreImage to store an RGBA_DXT3 texture.
*/
static GLboolean
-texstore_rgba_dxt3(STORE_PARAMS)
+texstore_rgba_dxt3(TEXSTORE_PARAMS)
{
const GLchan *pixels;
GLint srcRowStride;
ASSERT(dstXoffset % 4 == 0);
ASSERT(dstYoffset % 4 == 0);
ASSERT(dstZoffset % 4 == 0);
+ (void) dstZoffset;
+ (void) dstImageOffsets;
if (srcFormat != GL_RGBA ||
srcType != CHAN_TYPE ||
}
dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
- GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,
+ dstFormat->MesaFormat,
texWidth, (GLubyte *) dstAddr);
-#if 0
- compress_rgba_dxt3(ctx, srcWidth, srcHeight, pixels,
- srcRowStride, dst, dstRowStride);
-#endif
+ if (ext_tx_compress_dxtn) {
+ (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels,
+ GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,
+ dst, dstRowStride);
+ }
+ else {
+ _mesa_problem(ctx, "external dxt library not available");
+ }
+
if (tempImage)
_mesa_free((void *) tempImage);
* Called via TexFormat->StoreImage to store an RGBA_DXT5 texture.
*/
static GLboolean
-texstore_rgba_dxt5(STORE_PARAMS)
+texstore_rgba_dxt5(TEXSTORE_PARAMS)
{
const GLchan *pixels;
GLint srcRowStride;
ASSERT(dstXoffset % 4 == 0);
ASSERT(dstYoffset % 4 == 0);
ASSERT(dstZoffset % 4 == 0);
+ (void) dstZoffset;
+ (void) dstImageOffsets;
if (srcFormat != GL_RGBA ||
srcType != CHAN_TYPE ||
}
dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0,
- GL_COMPRESSED_RGBA_S3TC_DXT5_EXT,
+ dstFormat->MesaFormat,
texWidth, (GLubyte *) dstAddr);
-#if 0
- compress_rgba_dxt5(ctx, srcWidth, srcHeight, pixels,
- srcRowStride, dst, dstRowStride);
-#endif
+ if (ext_tx_compress_dxtn) {
+ (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels,
+ GL_COMPRESSED_RGBA_S3TC_DXT5_EXT,
+ dst, dstRowStride);
+ }
+ else {
+ _mesa_problem(ctx, "external dxt library not available");
+ }
+
if (tempImage)
_mesa_free((void *) tempImage);
fetch_texel_2d_rgb_dxt1( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
+ (void) k;
+ if (fetch_ext_rgb_dxt1) {
+ ASSERT (sizeof(GLchan) == sizeof(GLubyte));
+ fetch_ext_rgb_dxt1(texImage->RowStride,
+ (GLubyte *)(texImage)->Data, i, j, texel);
+ }
+ else
+ _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n");
}
fetch_texel_2d_rgba_dxt1( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
+ (void) k;
+ if (fetch_ext_rgba_dxt1) {
+ fetch_ext_rgba_dxt1(texImage->RowStride,
+ (GLubyte *)(texImage)->Data, i, j, texel);
+ }
+ else
+ _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n");
}
fetch_texel_2d_rgba_dxt3( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
+ (void) k;
+ if (fetch_ext_rgba_dxt3) {
+ ASSERT (sizeof(GLchan) == sizeof(GLubyte));
+ fetch_ext_rgba_dxt3(texImage->RowStride, (GLubyte *)(texImage)->Data,
+ i, j, texel);
+ }
+ else
+ _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n");
}
fetch_texel_2d_rgba_dxt5( const struct gl_texture_image *texImage,
GLint i, GLint j, GLint k, GLchan *texel )
{
+ (void) k;
+ if (fetch_ext_rgba_dxt5) {
+ fetch_ext_rgba_dxt5(texImage->RowStride, (GLubyte *)(texImage)->Data,
+ i, j, texel);
+ }
+ else
+ _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n");
}
0, /* IntensityBits */
0, /* IndexBits */
0, /* DepthBits */
+ 0, /* StencilBits */
0, /* TexelBytes */
texstore_rgb_dxt1, /* StoreTexImageFunc */
NULL, /*impossible*/ /* FetchTexel1D */
NULL, /*impossible*/ /* FetchTexel1Df */
fetch_texel_2d_f_rgb_dxt1, /* FetchTexel2Df */
NULL, /*impossible*/ /* FetchTexel3Df */
+ NULL /* StoreTexel */
};
const struct gl_texture_format _mesa_texformat_rgba_dxt1 = {
0, /* IntensityBits */
0, /* IndexBits */
0, /* DepthBits */
+ 0, /* StencilBits */
0, /* TexelBytes */
texstore_rgba_dxt1, /* StoreTexImageFunc */
NULL, /*impossible*/ /* FetchTexel1D */
NULL, /*impossible*/ /* FetchTexel1Df */
fetch_texel_2d_f_rgba_dxt1, /* FetchTexel2Df */
NULL, /*impossible*/ /* FetchTexel3Df */
+ NULL /* StoreTexel */
};
const struct gl_texture_format _mesa_texformat_rgba_dxt3 = {
0, /* IntensityBits */
0, /* IndexBits */
0, /* DepthBits */
+ 0, /* StencilBits */
0, /* TexelBytes */
texstore_rgba_dxt3, /* StoreTexImageFunc */
NULL, /*impossible*/ /* FetchTexel1D */
NULL, /*impossible*/ /* FetchTexel1Df */
fetch_texel_2d_f_rgba_dxt3, /* FetchTexel2Df */
NULL, /*impossible*/ /* FetchTexel3Df */
+ NULL /* StoreTexel */
};
const struct gl_texture_format _mesa_texformat_rgba_dxt5 = {
0, /* IntensityBits */
0, /* IndexBits */
0, /* DepthBits */
+ 0, /* StencilBits */
0, /* TexelBytes */
texstore_rgba_dxt5, /* StoreTexImageFunc */
NULL, /*impossible*/ /* FetchTexel1D */
NULL, /*impossible*/ /* FetchTexel1Df */
fetch_texel_2d_f_rgba_dxt5, /* FetchTexel2Df */
NULL, /*impossible*/ /* FetchTexel3Df */
+ NULL /* StoreTexel */
};
projects / mesa.git / blobdiff