| /* |
| * Mesa 3-D graphics library |
| * |
| * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. |
| * Copyright (c) 2008 VMware, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included |
| * in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| |
| /** |
| * \file texcompress_s3tc.c |
| * GL_EXT_texture_compression_s3tc support. |
| */ |
| |
| #include "glheader.h" |
| #include "imports.h" |
| #include "dlopen.h" |
| #include "image.h" |
| #include "macros.h" |
| #include "mtypes.h" |
| #include "texcompress.h" |
| #include "texcompress_s3tc.h" |
| #include "texstore.h" |
| #include "format_unpack.h" |
| #include "util/format_srgb.h" |
| |
| |
| #if defined(_WIN32) || defined(WIN32) |
| #define DXTN_LIBNAME "dxtn.dll" |
| #define RTLD_LAZY 0 |
| #define RTLD_GLOBAL 0 |
| #elif defined(__CYGWIN__) |
| #define DXTN_LIBNAME "cygtxc_dxtn.dll" |
| #else |
| #define DXTN_LIBNAME "libtxc_dxtn.so" |
| #endif |
| |
| typedef void (*dxtFetchTexelFuncExt)( GLint srcRowstride, const GLubyte *pixdata, GLint col, GLint row, GLvoid *texelOut ); |
| |
| static dxtFetchTexelFuncExt fetch_ext_rgb_dxt1 = NULL; |
| static dxtFetchTexelFuncExt fetch_ext_rgba_dxt1 = NULL; |
| static dxtFetchTexelFuncExt fetch_ext_rgba_dxt3 = NULL; |
| static dxtFetchTexelFuncExt fetch_ext_rgba_dxt5 = NULL; |
| |
| typedef void (*dxtCompressTexFuncExt)(GLint srccomps, GLint width, |
| GLint height, const GLubyte *srcPixData, |
| GLenum destformat, GLubyte *dest, |
| GLint dstRowStride); |
| |
| static dxtCompressTexFuncExt ext_tx_compress_dxtn = NULL; |
| |
| static void *dxtlibhandle = NULL; |
| |
| |
| void |
| _mesa_init_texture_s3tc( struct gl_context *ctx ) |
| { |
| /* called during context initialization */ |
| ctx->Mesa_DXTn = GL_FALSE; |
| if (!dxtlibhandle) { |
| dxtlibhandle = _mesa_dlopen(DXTN_LIBNAME, 0); |
| 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; |
| } |
| } |
| |
| /** |
| * Store user's image in rgb_dxt1 format. |
| */ |
| GLboolean |
| _mesa_texstore_rgb_dxt1(TEXSTORE_PARAMS) |
| { |
| const GLubyte *pixels; |
| GLubyte *dst; |
| const GLubyte *tempImage = NULL; |
| |
| assert(dstFormat == MESA_FORMAT_RGB_DXT1 || |
| dstFormat == MESA_FORMAT_SRGB_DXT1); |
| |
| if (srcFormat != GL_RGB || |
| srcType != GL_UNSIGNED_BYTE || |
| ctx->_ImageTransferState || |
| ALIGN(srcPacking->RowLength, srcPacking->Alignment) != srcWidth || |
| srcPacking->SwapBytes) { |
| /* convert image to RGB/GLubyte */ |
| GLubyte *tempImageSlices[1]; |
| int rgbRowStride = 3 * srcWidth * sizeof(GLubyte); |
| tempImage = malloc(srcWidth * srcHeight * 3 * sizeof(GLubyte)); |
| if (!tempImage) |
| return GL_FALSE; /* out of memory */ |
| tempImageSlices[0] = (GLubyte *) tempImage; |
| _mesa_texstore(ctx, dims, |
| baseInternalFormat, |
| MESA_FORMAT_RGB_UNORM8, |
| rgbRowStride, tempImageSlices, |
| srcWidth, srcHeight, srcDepth, |
| srcFormat, srcType, srcAddr, |
| srcPacking); |
| pixels = tempImage; |
| srcFormat = GL_RGB; |
| } |
| else { |
| pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight, |
| srcFormat, srcType, 0, 0); |
| } |
| |
| dst = dstSlices[0]; |
| |
| if (ext_tx_compress_dxtn) { |
| (*ext_tx_compress_dxtn)(3, srcWidth, srcHeight, pixels, |
| GL_COMPRESSED_RGB_S3TC_DXT1_EXT, |
| dst, dstRowStride); |
| } |
| else { |
| _mesa_warning(ctx, "external dxt library not available: texstore_rgb_dxt1"); |
| } |
| |
| free((void *) tempImage); |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** |
| * Store user's image in rgba_dxt1 format. |
| */ |
| GLboolean |
| _mesa_texstore_rgba_dxt1(TEXSTORE_PARAMS) |
| { |
| const GLubyte *pixels; |
| GLubyte *dst; |
| const GLubyte *tempImage = NULL; |
| |
| assert(dstFormat == MESA_FORMAT_RGBA_DXT1 || |
| dstFormat == MESA_FORMAT_SRGBA_DXT1); |
| |
| if (srcFormat != GL_RGBA || |
| srcType != GL_UNSIGNED_BYTE || |
| ctx->_ImageTransferState || |
| ALIGN(srcPacking->RowLength, srcPacking->Alignment) != srcWidth || |
| srcPacking->SwapBytes) { |
| /* convert image to RGBA/GLubyte */ |
| GLubyte *tempImageSlices[1]; |
| int rgbaRowStride = 4 * srcWidth * sizeof(GLubyte); |
| tempImage = malloc(srcWidth * srcHeight * 4 * sizeof(GLubyte)); |
| if (!tempImage) |
| return GL_FALSE; /* out of memory */ |
| tempImageSlices[0] = (GLubyte *) tempImage; |
| _mesa_texstore(ctx, dims, |
| baseInternalFormat, |
| _mesa_little_endian() ? MESA_FORMAT_R8G8B8A8_UNORM |
| : MESA_FORMAT_A8B8G8R8_UNORM, |
| rgbaRowStride, tempImageSlices, |
| srcWidth, srcHeight, srcDepth, |
| srcFormat, srcType, srcAddr, |
| srcPacking); |
| pixels = tempImage; |
| srcFormat = GL_RGBA; |
| } |
| else { |
| pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight, |
| srcFormat, srcType, 0, 0); |
| } |
| |
| dst = dstSlices[0]; |
| |
| if (ext_tx_compress_dxtn) { |
| (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, |
| GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, |
| dst, dstRowStride); |
| } |
| else { |
| _mesa_warning(ctx, "external dxt library not available: texstore_rgba_dxt1"); |
| } |
| |
| free((void*) tempImage); |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** |
| * Store user's image in rgba_dxt3 format. |
| */ |
| GLboolean |
| _mesa_texstore_rgba_dxt3(TEXSTORE_PARAMS) |
| { |
| const GLubyte *pixels; |
| GLubyte *dst; |
| const GLubyte *tempImage = NULL; |
| |
| assert(dstFormat == MESA_FORMAT_RGBA_DXT3 || |
| dstFormat == MESA_FORMAT_SRGBA_DXT3); |
| |
| if (srcFormat != GL_RGBA || |
| srcType != GL_UNSIGNED_BYTE || |
| ctx->_ImageTransferState || |
| ALIGN(srcPacking->RowLength, srcPacking->Alignment) != srcWidth || |
| srcPacking->SwapBytes) { |
| /* convert image to RGBA/GLubyte */ |
| GLubyte *tempImageSlices[1]; |
| int rgbaRowStride = 4 * srcWidth * sizeof(GLubyte); |
| tempImage = malloc(srcWidth * srcHeight * 4 * sizeof(GLubyte)); |
| if (!tempImage) |
| return GL_FALSE; /* out of memory */ |
| tempImageSlices[0] = (GLubyte *) tempImage; |
| _mesa_texstore(ctx, dims, |
| baseInternalFormat, |
| _mesa_little_endian() ? MESA_FORMAT_R8G8B8A8_UNORM |
| : MESA_FORMAT_A8B8G8R8_UNORM, |
| rgbaRowStride, tempImageSlices, |
| srcWidth, srcHeight, srcDepth, |
| srcFormat, srcType, srcAddr, |
| srcPacking); |
| pixels = tempImage; |
| } |
| else { |
| pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight, |
| srcFormat, srcType, 0, 0); |
| } |
| |
| dst = dstSlices[0]; |
| |
| if (ext_tx_compress_dxtn) { |
| (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, |
| GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, |
| dst, dstRowStride); |
| } |
| else { |
| _mesa_warning(ctx, "external dxt library not available: texstore_rgba_dxt3"); |
| } |
| |
| free((void *) tempImage); |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** |
| * Store user's image in rgba_dxt5 format. |
| */ |
| GLboolean |
| _mesa_texstore_rgba_dxt5(TEXSTORE_PARAMS) |
| { |
| const GLubyte *pixels; |
| GLubyte *dst; |
| const GLubyte *tempImage = NULL; |
| |
| assert(dstFormat == MESA_FORMAT_RGBA_DXT5 || |
| dstFormat == MESA_FORMAT_SRGBA_DXT5); |
| |
| if (srcFormat != GL_RGBA || |
| srcType != GL_UNSIGNED_BYTE || |
| ctx->_ImageTransferState || |
| ALIGN(srcPacking->RowLength, srcPacking->Alignment) != srcWidth || |
| srcPacking->SwapBytes) { |
| /* convert image to RGBA/GLubyte */ |
| GLubyte *tempImageSlices[1]; |
| int rgbaRowStride = 4 * srcWidth * sizeof(GLubyte); |
| tempImage = malloc(srcWidth * srcHeight * 4 * sizeof(GLubyte)); |
| if (!tempImage) |
| return GL_FALSE; /* out of memory */ |
| tempImageSlices[0] = (GLubyte *) tempImage; |
| _mesa_texstore(ctx, dims, |
| baseInternalFormat, |
| _mesa_little_endian() ? MESA_FORMAT_R8G8B8A8_UNORM |
| : MESA_FORMAT_A8B8G8R8_UNORM, |
| rgbaRowStride, tempImageSlices, |
| srcWidth, srcHeight, srcDepth, |
| srcFormat, srcType, srcAddr, |
| srcPacking); |
| pixels = tempImage; |
| } |
| else { |
| pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight, |
| srcFormat, srcType, 0, 0); |
| } |
| |
| dst = dstSlices[0]; |
| |
| if (ext_tx_compress_dxtn) { |
| (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, |
| GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, |
| dst, dstRowStride); |
| } |
| else { |
| _mesa_warning(ctx, "external dxt library not available: texstore_rgba_dxt5"); |
| } |
| |
| free((void *) tempImage); |
| |
| return GL_TRUE; |
| } |
| |
| |
| /** Report problem with dxt texture decompression, once */ |
| static void |
| problem(const char *func) |
| { |
| static GLboolean warned = GL_FALSE; |
| if (!warned) { |
| _mesa_debug(NULL, "attempted to decode DXT texture without " |
| "library available: %s\n", func); |
| warned = GL_TRUE; |
| } |
| } |
| |
| |
| static void |
| fetch_rgb_dxt1(const GLubyte *map, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| if (fetch_ext_rgb_dxt1) { |
| GLubyte tex[4]; |
| fetch_ext_rgb_dxt1(rowStride, map, i, j, tex); |
| texel[RCOMP] = UBYTE_TO_FLOAT(tex[RCOMP]); |
| texel[GCOMP] = UBYTE_TO_FLOAT(tex[GCOMP]); |
| texel[BCOMP] = UBYTE_TO_FLOAT(tex[BCOMP]); |
| texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]); |
| } |
| else { |
| problem("rgb_dxt1"); |
| } |
| } |
| |
| static void |
| fetch_rgba_dxt1(const GLubyte *map, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| if (fetch_ext_rgba_dxt1) { |
| GLubyte tex[4]; |
| fetch_ext_rgba_dxt1(rowStride, map, i, j, tex); |
| texel[RCOMP] = UBYTE_TO_FLOAT(tex[RCOMP]); |
| texel[GCOMP] = UBYTE_TO_FLOAT(tex[GCOMP]); |
| texel[BCOMP] = UBYTE_TO_FLOAT(tex[BCOMP]); |
| texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]); |
| } |
| else { |
| problem("rgba_dxt1"); |
| } |
| } |
| |
| static void |
| fetch_rgba_dxt3(const GLubyte *map, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| if (fetch_ext_rgba_dxt3) { |
| GLubyte tex[4]; |
| fetch_ext_rgba_dxt3(rowStride, map, i, j, tex); |
| texel[RCOMP] = UBYTE_TO_FLOAT(tex[RCOMP]); |
| texel[GCOMP] = UBYTE_TO_FLOAT(tex[GCOMP]); |
| texel[BCOMP] = UBYTE_TO_FLOAT(tex[BCOMP]); |
| texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]); |
| } |
| else { |
| problem("rgba_dxt3"); |
| } |
| } |
| |
| static void |
| fetch_rgba_dxt5(const GLubyte *map, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| if (fetch_ext_rgba_dxt5) { |
| GLubyte tex[4]; |
| fetch_ext_rgba_dxt5(rowStride, map, i, j, tex); |
| texel[RCOMP] = UBYTE_TO_FLOAT(tex[RCOMP]); |
| texel[GCOMP] = UBYTE_TO_FLOAT(tex[GCOMP]); |
| texel[BCOMP] = UBYTE_TO_FLOAT(tex[BCOMP]); |
| texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]); |
| } |
| else { |
| problem("rgba_dxt5"); |
| } |
| } |
| |
| |
| static void |
| fetch_srgb_dxt1(const GLubyte *map, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| if (fetch_ext_rgb_dxt1) { |
| GLubyte tex[4]; |
| fetch_ext_rgb_dxt1(rowStride, map, i, j, tex); |
| texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(tex[RCOMP]); |
| texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(tex[GCOMP]); |
| texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(tex[BCOMP]); |
| texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]); |
| } |
| else { |
| problem("srgb_dxt1"); |
| } |
| } |
| |
| static void |
| fetch_srgba_dxt1(const GLubyte *map, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| if (fetch_ext_rgba_dxt1) { |
| GLubyte tex[4]; |
| fetch_ext_rgba_dxt1(rowStride, map, i, j, tex); |
| texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(tex[RCOMP]); |
| texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(tex[GCOMP]); |
| texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(tex[BCOMP]); |
| texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]); |
| } |
| else { |
| problem("srgba_dxt1"); |
| } |
| } |
| |
| static void |
| fetch_srgba_dxt3(const GLubyte *map, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| if (fetch_ext_rgba_dxt3) { |
| GLubyte tex[4]; |
| fetch_ext_rgba_dxt3(rowStride, map, i, j, tex); |
| texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(tex[RCOMP]); |
| texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(tex[GCOMP]); |
| texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(tex[BCOMP]); |
| texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]); |
| } |
| else { |
| problem("srgba_dxt3"); |
| } |
| } |
| |
| static void |
| fetch_srgba_dxt5(const GLubyte *map, |
| GLint rowStride, GLint i, GLint j, GLfloat *texel) |
| { |
| if (fetch_ext_rgba_dxt5) { |
| GLubyte tex[4]; |
| fetch_ext_rgba_dxt5(rowStride, map, i, j, tex); |
| texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(tex[RCOMP]); |
| texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(tex[GCOMP]); |
| texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(tex[BCOMP]); |
| texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]); |
| } |
| else { |
| problem("srgba_dxt5"); |
| } |
| } |
| |
| |
| |
| compressed_fetch_func |
| _mesa_get_dxt_fetch_func(mesa_format format) |
| { |
| switch (format) { |
| case MESA_FORMAT_RGB_DXT1: |
| return fetch_rgb_dxt1; |
| case MESA_FORMAT_RGBA_DXT1: |
| return fetch_rgba_dxt1; |
| case MESA_FORMAT_RGBA_DXT3: |
| return fetch_rgba_dxt3; |
| case MESA_FORMAT_RGBA_DXT5: |
| return fetch_rgba_dxt5; |
| case MESA_FORMAT_SRGB_DXT1: |
| return fetch_srgb_dxt1; |
| case MESA_FORMAT_SRGBA_DXT1: |
| return fetch_srgba_dxt1; |
| case MESA_FORMAT_SRGBA_DXT3: |
| return fetch_srgba_dxt3; |
| case MESA_FORMAT_SRGBA_DXT5: |
| return fetch_srgba_dxt5; |
| default: |
| return NULL; |
| } |
| } |
