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texcompress_s3tc.c
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00001 /* 00002 * Mesa 3-D graphics library 00003 * Version: 6.5.3 00004 * 00005 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. 00006 * 00007 * Permission is hereby granted, free of charge, to any person obtaining a 00008 * copy of this software and associated documentation files (the "Software"), 00009 * to deal in the Software without restriction, including without limitation 00010 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 00011 * and/or sell copies of the Software, and to permit persons to whom the 00012 * Software is furnished to do so, subject to the following conditions: 00013 * 00014 * The above copyright notice and this permission notice shall be included 00015 * in all copies or substantial portions of the Software. 00016 * 00017 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 00018 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00019 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 00020 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 00021 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 00022 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00023 */ 00024 00025 00031 #ifndef USE_EXTERNAL_DXTN_LIB 00032 #define USE_EXTERNAL_DXTN_LIB 1 00033 #endif 00034 00035 #include "glheader.h" 00036 #include "imports.h" 00037 #include "colormac.h" 00038 #include "context.h" 00039 #include "convolve.h" 00040 #include "dlopen.h" 00041 #include "image.h" 00042 #include "texcompress.h" 00043 #include "texformat.h" 00044 #include "texstore.h" 00045 00046 #ifdef __MINGW32__ 00047 #define DXTN_LIBNAME "dxtn.dll" 00048 #define RTLD_LAZY 0 00049 #define RTLD_GLOBAL 0 00050 #elif defined(__DJGPP__) 00051 #define DXTN_LIBNAME "dxtn.dxe" 00052 #else 00053 #define DXTN_LIBNAME "libtxc_dxtn.so" 00054 #endif 00055 00056 00057 typedef void (*dxtFetchTexelFuncExt)( GLint srcRowstride, GLubyte *pixdata, GLint col, GLint row, GLvoid *texelOut ); 00058 00059 dxtFetchTexelFuncExt fetch_ext_rgb_dxt1 = NULL; 00060 dxtFetchTexelFuncExt fetch_ext_rgba_dxt1 = NULL; 00061 dxtFetchTexelFuncExt fetch_ext_rgba_dxt3 = NULL; 00062 dxtFetchTexelFuncExt fetch_ext_rgba_dxt5 = NULL; 00063 00064 typedef void (*dxtCompressTexFuncExt)(GLint srccomps, GLint width, 00065 GLint height, const GLchan *srcPixData, 00066 GLenum destformat, GLubyte *dest, 00067 GLint dstRowStride); 00068 00069 static dxtCompressTexFuncExt ext_tx_compress_dxtn = NULL; 00070 00071 static void *dxtlibhandle = NULL; 00072 00073 00074 void 00075 _mesa_init_texture_s3tc( GLcontext *ctx ) 00076 { 00077 /* called during context initialization */ 00078 ctx->Mesa_DXTn = GL_FALSE; 00079 #if USE_EXTERNAL_DXTN_LIB 00080 if (!dxtlibhandle) { 00081 dxtlibhandle = _mesa_dlopen(DXTN_LIBNAME, 0); 00082 if (!dxtlibhandle) { 00083 _mesa_warning(ctx, "couldn't open " DXTN_LIBNAME ", software DXTn " 00084 "compression/decompression unavailable"); 00085 } 00086 else { 00087 /* the fetch functions are not per context! Might be problematic... */ 00088 fetch_ext_rgb_dxt1 = (dxtFetchTexelFuncExt) 00089 _mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgb_dxt1"); 00090 fetch_ext_rgba_dxt1 = (dxtFetchTexelFuncExt) 00091 _mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt1"); 00092 fetch_ext_rgba_dxt3 = (dxtFetchTexelFuncExt) 00093 _mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt3"); 00094 fetch_ext_rgba_dxt5 = (dxtFetchTexelFuncExt) 00095 _mesa_dlsym(dxtlibhandle, "fetch_2d_texel_rgba_dxt5"); 00096 ext_tx_compress_dxtn = (dxtCompressTexFuncExt) 00097 _mesa_dlsym(dxtlibhandle, "tx_compress_dxtn"); 00098 00099 if (!fetch_ext_rgb_dxt1 || 00100 !fetch_ext_rgba_dxt1 || 00101 !fetch_ext_rgba_dxt3 || 00102 !fetch_ext_rgba_dxt5 || 00103 !ext_tx_compress_dxtn) { 00104 _mesa_warning(ctx, "couldn't reference all symbols in " 00105 DXTN_LIBNAME ", software DXTn compression/decompression " 00106 "unavailable"); 00107 fetch_ext_rgb_dxt1 = NULL; 00108 fetch_ext_rgba_dxt1 = NULL; 00109 fetch_ext_rgba_dxt3 = NULL; 00110 fetch_ext_rgba_dxt5 = NULL; 00111 ext_tx_compress_dxtn = NULL; 00112 _mesa_dlclose(dxtlibhandle); 00113 dxtlibhandle = NULL; 00114 } 00115 } 00116 } 00117 if (dxtlibhandle) { 00118 ctx->Mesa_DXTn = GL_TRUE; 00119 _mesa_warning(ctx, "software DXTn compression/decompression available"); 00120 } 00121 #else 00122 (void) ctx; 00123 #endif 00124 } 00125 00129 static GLboolean 00130 texstore_rgb_dxt1(TEXSTORE_PARAMS) 00131 { 00132 const GLchan *pixels; 00133 GLint srcRowStride; 00134 GLubyte *dst; 00135 const GLint texWidth = dstRowStride * 4 / 8; /* a bit of a hack */ 00136 const GLchan *tempImage = NULL; 00137 00138 ASSERT(dstFormat == &_mesa_texformat_rgb_dxt1); 00139 ASSERT(dstXoffset % 4 == 0); 00140 ASSERT(dstYoffset % 4 == 0); 00141 ASSERT(dstZoffset % 4 == 0); 00142 (void) dstZoffset; 00143 (void) dstImageOffsets; 00144 00145 if (srcFormat != GL_RGB || 00146 srcType != CHAN_TYPE || 00147 ctx->_ImageTransferState || 00148 srcPacking->SwapBytes) { 00149 /* convert image to RGB/GLchan */ 00150 tempImage = _mesa_make_temp_chan_image(ctx, dims, 00151 baseInternalFormat, 00152 dstFormat->BaseFormat, 00153 srcWidth, srcHeight, srcDepth, 00154 srcFormat, srcType, srcAddr, 00155 srcPacking); 00156 if (!tempImage) 00157 return GL_FALSE; /* out of memory */ 00158 _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight); 00159 pixels = tempImage; 00160 srcRowStride = 3 * srcWidth; 00161 srcFormat = GL_RGB; 00162 } 00163 else { 00164 pixels = (const GLchan *) srcAddr; 00165 srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, 00166 srcType) / sizeof(GLchan); 00167 } 00168 00169 dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0, 00170 dstFormat->MesaFormat, 00171 texWidth, (GLubyte *) dstAddr); 00172 00173 if (ext_tx_compress_dxtn) { 00174 (*ext_tx_compress_dxtn)(3, srcWidth, srcHeight, pixels, 00175 GL_COMPRESSED_RGB_S3TC_DXT1_EXT, 00176 dst, dstRowStride); 00177 } 00178 else { 00179 _mesa_warning(ctx, "external dxt library not available"); 00180 } 00181 00182 if (tempImage) 00183 _mesa_free((void *) tempImage); 00184 00185 return GL_TRUE; 00186 } 00187 00188 00192 static GLboolean 00193 texstore_rgba_dxt1(TEXSTORE_PARAMS) 00194 { 00195 const GLchan *pixels; 00196 GLint srcRowStride; 00197 GLubyte *dst; 00198 const GLint texWidth = dstRowStride * 4 / 8; /* a bit of a hack */ 00199 const GLchan *tempImage = NULL; 00200 00201 ASSERT(dstFormat == &_mesa_texformat_rgba_dxt1); 00202 ASSERT(dstXoffset % 4 == 0); 00203 ASSERT(dstYoffset % 4 == 0); 00204 ASSERT(dstZoffset % 4 == 0); 00205 (void) dstZoffset; 00206 (void) dstImageOffsets; 00207 00208 if (srcFormat != GL_RGBA || 00209 srcType != CHAN_TYPE || 00210 ctx->_ImageTransferState || 00211 srcPacking->SwapBytes) { 00212 /* convert image to RGBA/GLchan */ 00213 tempImage = _mesa_make_temp_chan_image(ctx, dims, 00214 baseInternalFormat, 00215 dstFormat->BaseFormat, 00216 srcWidth, srcHeight, srcDepth, 00217 srcFormat, srcType, srcAddr, 00218 srcPacking); 00219 if (!tempImage) 00220 return GL_FALSE; /* out of memory */ 00221 _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight); 00222 pixels = tempImage; 00223 srcRowStride = 4 * srcWidth; 00224 srcFormat = GL_RGBA; 00225 } 00226 else { 00227 pixels = (const GLchan *) srcAddr; 00228 srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, 00229 srcType) / sizeof(GLchan); 00230 } 00231 00232 dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0, 00233 dstFormat->MesaFormat, 00234 texWidth, (GLubyte *) dstAddr); 00235 if (ext_tx_compress_dxtn) { 00236 (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, 00237 GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, 00238 dst, dstRowStride); 00239 } 00240 else { 00241 _mesa_warning(ctx, "external dxt library not available"); 00242 } 00243 00244 if (tempImage) 00245 _mesa_free((void*) tempImage); 00246 00247 return GL_TRUE; 00248 } 00249 00250 00254 static GLboolean 00255 texstore_rgba_dxt3(TEXSTORE_PARAMS) 00256 { 00257 const GLchan *pixels; 00258 GLint srcRowStride; 00259 GLubyte *dst; 00260 const GLint texWidth = dstRowStride * 4 / 16; /* a bit of a hack */ 00261 const GLchan *tempImage = NULL; 00262 00263 ASSERT(dstFormat == &_mesa_texformat_rgba_dxt3); 00264 ASSERT(dstXoffset % 4 == 0); 00265 ASSERT(dstYoffset % 4 == 0); 00266 ASSERT(dstZoffset % 4 == 0); 00267 (void) dstZoffset; 00268 (void) dstImageOffsets; 00269 00270 if (srcFormat != GL_RGBA || 00271 srcType != CHAN_TYPE || 00272 ctx->_ImageTransferState || 00273 srcPacking->SwapBytes) { 00274 /* convert image to RGBA/GLchan */ 00275 tempImage = _mesa_make_temp_chan_image(ctx, dims, 00276 baseInternalFormat, 00277 dstFormat->BaseFormat, 00278 srcWidth, srcHeight, srcDepth, 00279 srcFormat, srcType, srcAddr, 00280 srcPacking); 00281 if (!tempImage) 00282 return GL_FALSE; /* out of memory */ 00283 _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight); 00284 pixels = tempImage; 00285 srcRowStride = 4 * srcWidth; 00286 } 00287 else { 00288 pixels = (const GLchan *) srcAddr; 00289 srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, 00290 srcType) / sizeof(GLchan); 00291 } 00292 00293 dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0, 00294 dstFormat->MesaFormat, 00295 texWidth, (GLubyte *) dstAddr); 00296 if (ext_tx_compress_dxtn) { 00297 (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, 00298 GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, 00299 dst, dstRowStride); 00300 } 00301 else { 00302 _mesa_warning(ctx, "external dxt library not available"); 00303 } 00304 00305 if (tempImage) 00306 _mesa_free((void *) tempImage); 00307 00308 return GL_TRUE; 00309 } 00310 00311 00315 static GLboolean 00316 texstore_rgba_dxt5(TEXSTORE_PARAMS) 00317 { 00318 const GLchan *pixels; 00319 GLint srcRowStride; 00320 GLubyte *dst; 00321 const GLint texWidth = dstRowStride * 4 / 16; /* a bit of a hack */ 00322 const GLchan *tempImage = NULL; 00323 00324 ASSERT(dstFormat == &_mesa_texformat_rgba_dxt5); 00325 ASSERT(dstXoffset % 4 == 0); 00326 ASSERT(dstYoffset % 4 == 0); 00327 ASSERT(dstZoffset % 4 == 0); 00328 (void) dstZoffset; 00329 (void) dstImageOffsets; 00330 00331 if (srcFormat != GL_RGBA || 00332 srcType != CHAN_TYPE || 00333 ctx->_ImageTransferState || 00334 srcPacking->SwapBytes) { 00335 /* convert image to RGBA/GLchan */ 00336 tempImage = _mesa_make_temp_chan_image(ctx, dims, 00337 baseInternalFormat, 00338 dstFormat->BaseFormat, 00339 srcWidth, srcHeight, srcDepth, 00340 srcFormat, srcType, srcAddr, 00341 srcPacking); 00342 if (!tempImage) 00343 return GL_FALSE; /* out of memory */ 00344 _mesa_adjust_image_for_convolution(ctx, dims, &srcWidth, &srcHeight); 00345 pixels = tempImage; 00346 srcRowStride = 4 * srcWidth; 00347 } 00348 else { 00349 pixels = (const GLchan *) srcAddr; 00350 srcRowStride = _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, 00351 srcType) / sizeof(GLchan); 00352 } 00353 00354 dst = _mesa_compressed_image_address(dstXoffset, dstYoffset, 0, 00355 dstFormat->MesaFormat, 00356 texWidth, (GLubyte *) dstAddr); 00357 if (ext_tx_compress_dxtn) { 00358 (*ext_tx_compress_dxtn)(4, srcWidth, srcHeight, pixels, 00359 GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, 00360 dst, dstRowStride); 00361 } 00362 else { 00363 _mesa_warning(ctx, "external dxt library not available"); 00364 } 00365 00366 if (tempImage) 00367 _mesa_free((void *) tempImage); 00368 00369 return GL_TRUE; 00370 } 00371 00372 00373 static void 00374 fetch_texel_2d_rgb_dxt1( const struct gl_texture_image *texImage, 00375 GLint i, GLint j, GLint k, GLchan *texel ) 00376 { 00377 (void) k; 00378 if (fetch_ext_rgb_dxt1) { 00379 ASSERT (sizeof(GLchan) == sizeof(GLubyte)); 00380 fetch_ext_rgb_dxt1(texImage->RowStride, 00381 (GLubyte *)(texImage)->Data, i, j, texel); 00382 } 00383 else 00384 _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); 00385 } 00386 00387 00388 static void 00389 fetch_texel_2d_f_rgb_dxt1( const struct gl_texture_image *texImage, 00390 GLint i, GLint j, GLint k, GLfloat *texel ) 00391 { 00392 /* just sample as GLchan and convert to float here */ 00393 GLchan rgba[4]; 00394 fetch_texel_2d_rgb_dxt1(texImage, i, j, k, rgba); 00395 texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]); 00396 texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]); 00397 texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]); 00398 texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); 00399 } 00400 00401 00402 static void 00403 fetch_texel_2d_rgba_dxt1( const struct gl_texture_image *texImage, 00404 GLint i, GLint j, GLint k, GLchan *texel ) 00405 { 00406 (void) k; 00407 if (fetch_ext_rgba_dxt1) { 00408 fetch_ext_rgba_dxt1(texImage->RowStride, 00409 (GLubyte *)(texImage)->Data, i, j, texel); 00410 } 00411 else 00412 _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); 00413 } 00414 00415 00416 static void 00417 fetch_texel_2d_f_rgba_dxt1( const struct gl_texture_image *texImage, 00418 GLint i, GLint j, GLint k, GLfloat *texel ) 00419 { 00420 /* just sample as GLchan and convert to float here */ 00421 GLchan rgba[4]; 00422 fetch_texel_2d_rgba_dxt1(texImage, i, j, k, rgba); 00423 texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]); 00424 texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]); 00425 texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]); 00426 texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); 00427 } 00428 00429 00430 static void 00431 fetch_texel_2d_rgba_dxt3( const struct gl_texture_image *texImage, 00432 GLint i, GLint j, GLint k, GLchan *texel ) 00433 { 00434 (void) k; 00435 if (fetch_ext_rgba_dxt3) { 00436 ASSERT (sizeof(GLchan) == sizeof(GLubyte)); 00437 fetch_ext_rgba_dxt3(texImage->RowStride, (GLubyte *)(texImage)->Data, 00438 i, j, texel); 00439 } 00440 else 00441 _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); 00442 } 00443 00444 00445 static void 00446 fetch_texel_2d_f_rgba_dxt3( const struct gl_texture_image *texImage, 00447 GLint i, GLint j, GLint k, GLfloat *texel ) 00448 { 00449 /* just sample as GLchan and convert to float here */ 00450 GLchan rgba[4]; 00451 fetch_texel_2d_rgba_dxt3(texImage, i, j, k, rgba); 00452 texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]); 00453 texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]); 00454 texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]); 00455 texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); 00456 } 00457 00458 00459 static void 00460 fetch_texel_2d_rgba_dxt5( const struct gl_texture_image *texImage, 00461 GLint i, GLint j, GLint k, GLchan *texel ) 00462 { 00463 (void) k; 00464 if (fetch_ext_rgba_dxt5) { 00465 fetch_ext_rgba_dxt5(texImage->RowStride, (GLubyte *)(texImage)->Data, 00466 i, j, texel); 00467 } 00468 else 00469 _mesa_debug(NULL, "attempted to decode s3tc texture without library available\n"); 00470 } 00471 00472 00473 static void 00474 fetch_texel_2d_f_rgba_dxt5( const struct gl_texture_image *texImage, 00475 GLint i, GLint j, GLint k, GLfloat *texel ) 00476 { 00477 /* just sample as GLchan and convert to float here */ 00478 GLchan rgba[4]; 00479 fetch_texel_2d_rgba_dxt5(texImage, i, j, k, rgba); 00480 texel[RCOMP] = CHAN_TO_FLOAT(rgba[RCOMP]); 00481 texel[GCOMP] = CHAN_TO_FLOAT(rgba[GCOMP]); 00482 texel[BCOMP] = CHAN_TO_FLOAT(rgba[BCOMP]); 00483 texel[ACOMP] = CHAN_TO_FLOAT(rgba[ACOMP]); 00484 } 00485 00486 00487 const struct gl_texture_format _mesa_texformat_rgb_dxt1 = { 00488 MESA_FORMAT_RGB_DXT1, /* MesaFormat */ 00489 GL_RGB, /* BaseFormat */ 00490 GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 00491 4, /*approx*/ /* RedBits */ 00492 4, /*approx*/ /* GreenBits */ 00493 4, /*approx*/ /* BlueBits */ 00494 0, /* AlphaBits */ 00495 0, /* LuminanceBits */ 00496 0, /* IntensityBits */ 00497 0, /* IndexBits */ 00498 0, /* DepthBits */ 00499 0, /* StencilBits */ 00500 0, /* TexelBytes */ 00501 texstore_rgb_dxt1, /* StoreTexImageFunc */ 00502 NULL, /*impossible*/ /* FetchTexel1D */ 00503 fetch_texel_2d_rgb_dxt1, /* FetchTexel2D */ 00504 NULL, /*impossible*/ /* FetchTexel3D */ 00505 NULL, /*impossible*/ /* FetchTexel1Df */ 00506 fetch_texel_2d_f_rgb_dxt1, /* FetchTexel2Df */ 00507 NULL, /*impossible*/ /* FetchTexel3Df */ 00508 NULL /* StoreTexel */ 00509 }; 00510 00511 #if FEATURE_EXT_texture_sRGB 00512 const struct gl_texture_format _mesa_texformat_srgb_dxt1 = { 00513 MESA_FORMAT_SRGB_DXT1, /* MesaFormat */ 00514 GL_RGB, /* BaseFormat */ 00515 GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 00516 4, /*approx*/ /* RedBits */ 00517 4, /*approx*/ /* GreenBits */ 00518 4, /*approx*/ /* BlueBits */ 00519 0, /* AlphaBits */ 00520 0, /* LuminanceBits */ 00521 0, /* IntensityBits */ 00522 0, /* IndexBits */ 00523 0, /* DepthBits */ 00524 0, /* StencilBits */ 00525 0, /* TexelBytes */ 00526 texstore_rgb_dxt1, /* StoreTexImageFunc */ 00527 NULL, /*impossible*/ /* FetchTexel1D */ 00528 fetch_texel_2d_rgb_dxt1, /* FetchTexel2D */ 00529 NULL, /*impossible*/ /* FetchTexel3D */ 00530 NULL, /*impossible*/ /* FetchTexel1Df */ 00531 fetch_texel_2d_f_rgb_dxt1, /* FetchTexel2Df */ 00532 NULL, /*impossible*/ /* FetchTexel3Df */ 00533 NULL /* StoreTexel */ 00534 }; 00535 #endif 00536 00537 const struct gl_texture_format _mesa_texformat_rgba_dxt1 = { 00538 MESA_FORMAT_RGBA_DXT1, /* MesaFormat */ 00539 GL_RGBA, /* BaseFormat */ 00540 GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 00541 4, /*approx*/ /* RedBits */ 00542 4, /*approx*/ /* GreenBits */ 00543 4, /*approx*/ /* BlueBits */ 00544 1, /*approx*/ /* AlphaBits */ 00545 0, /* LuminanceBits */ 00546 0, /* IntensityBits */ 00547 0, /* IndexBits */ 00548 0, /* DepthBits */ 00549 0, /* StencilBits */ 00550 0, /* TexelBytes */ 00551 texstore_rgba_dxt1, /* StoreTexImageFunc */ 00552 NULL, /*impossible*/ /* FetchTexel1D */ 00553 fetch_texel_2d_rgba_dxt1, /* FetchTexel2D */ 00554 NULL, /*impossible*/ /* FetchTexel3D */ 00555 NULL, /*impossible*/ /* FetchTexel1Df */ 00556 fetch_texel_2d_f_rgba_dxt1, /* FetchTexel2Df */ 00557 NULL, /*impossible*/ /* FetchTexel3Df */ 00558 NULL /* StoreTexel */ 00559 }; 00560 00561 const struct gl_texture_format _mesa_texformat_rgba_dxt3 = { 00562 MESA_FORMAT_RGBA_DXT3, /* MesaFormat */ 00563 GL_RGBA, /* BaseFormat */ 00564 GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 00565 4, /*approx*/ /* RedBits */ 00566 4, /*approx*/ /* GreenBits */ 00567 4, /*approx*/ /* BlueBits */ 00568 4, /*approx*/ /* AlphaBits */ 00569 0, /* LuminanceBits */ 00570 0, /* IntensityBits */ 00571 0, /* IndexBits */ 00572 0, /* DepthBits */ 00573 0, /* StencilBits */ 00574 0, /* TexelBytes */ 00575 texstore_rgba_dxt3, /* StoreTexImageFunc */ 00576 NULL, /*impossible*/ /* FetchTexel1D */ 00577 fetch_texel_2d_rgba_dxt3, /* FetchTexel2D */ 00578 NULL, /*impossible*/ /* FetchTexel3D */ 00579 NULL, /*impossible*/ /* FetchTexel1Df */ 00580 fetch_texel_2d_f_rgba_dxt3, /* FetchTexel2Df */ 00581 NULL, /*impossible*/ /* FetchTexel3Df */ 00582 NULL /* StoreTexel */ 00583 }; 00584 00585 const struct gl_texture_format _mesa_texformat_rgba_dxt5 = { 00586 MESA_FORMAT_RGBA_DXT5, /* MesaFormat */ 00587 GL_RGBA, /* BaseFormat */ 00588 GL_UNSIGNED_NORMALIZED_ARB, /* DataType */ 00589 4,/*approx*/ /* RedBits */ 00590 4,/*approx*/ /* GreenBits */ 00591 4,/*approx*/ /* BlueBits */ 00592 4,/*approx*/ /* AlphaBits */ 00593 0, /* LuminanceBits */ 00594 0, /* IntensityBits */ 00595 0, /* IndexBits */ 00596 0, /* DepthBits */ 00597 0, /* StencilBits */ 00598 0, /* TexelBytes */ 00599 texstore_rgba_dxt5, /* StoreTexImageFunc */ 00600 NULL, /*impossible*/ /* FetchTexel1D */ 00601 fetch_texel_2d_rgba_dxt5, /* FetchTexel2D */ 00602 NULL, /*impossible*/ /* FetchTexel3D */ 00603 NULL, /*impossible*/ /* FetchTexel1Df */ 00604 fetch_texel_2d_f_rgba_dxt5, /* FetchTexel2Df */ 00605 NULL, /*impossible*/ /* FetchTexel3Df */ 00606 NULL /* StoreTexel */ 00607 };
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