1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008 VMware, Inc.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26
27 /**
28 * \file texcompress_s3tc.c
29 * GL_EXT_texture_compression_s3tc support.
30 */
31
32 #include "glheader.h"
33
34 #include "image.h"
35 #include "macros.h"
36 #include "mtypes.h"
37 #include "texcompress.h"
38 #include "texcompress_s3tc.h"
39 #include "texcompress_s3tc_tmp.h"
40 #include "texstore.h"
41 #include "format_unpack.h"
42 #include "util/format_srgb.h"
43
44
45 /**
46 * Store user's image in rgb_dxt1 format.
47 */
48 GLboolean
_mesa_texstore_rgb_dxt1(TEXSTORE_PARAMS)49 _mesa_texstore_rgb_dxt1(TEXSTORE_PARAMS)
50 {
51 const GLubyte *pixels;
52 GLubyte *dst;
53 const GLubyte *tempImage = NULL;
54 int srccomps = srcFormat == GL_RGB ? 3 : 4;
55
56 assert(dstFormat == MESA_FORMAT_RGB_DXT1 ||
57 dstFormat == MESA_FORMAT_SRGB_DXT1);
58
59 if (!(srcFormat == GL_RGB || srcFormat == GL_RGBA) ||
60 srcType != GL_UNSIGNED_BYTE ||
61 ctx->_ImageTransferState ||
62 _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType) != srccomps * srcWidth * sizeof(GLubyte) ||
63 srcPacking->SkipImages ||
64 srcPacking->SwapBytes) {
65 /* convert image to RGB/GLubyte */
66 GLubyte *tempImageSlices[1];
67 int rgbRowStride = 3 * srcWidth * sizeof(GLubyte);
68 tempImage = malloc(srcWidth * srcHeight * 3 * sizeof(GLubyte));
69 if (!tempImage)
70 return GL_FALSE; /* out of memory */
71 tempImageSlices[0] = (GLubyte *) tempImage;
72 _mesa_texstore(ctx, dims,
73 baseInternalFormat,
74 MESA_FORMAT_RGB_UNORM8,
75 rgbRowStride, tempImageSlices,
76 srcWidth, srcHeight, srcDepth,
77 srcFormat, srcType, srcAddr,
78 srcPacking);
79 pixels = tempImage;
80 srcFormat = GL_RGB;
81 srccomps = 3;
82 }
83 else {
84 pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight,
85 srcFormat, srcType, 0, 0);
86 }
87
88 dst = dstSlices[0];
89
90 tx_compress_dxt1(srccomps, srcWidth, srcHeight, pixels,
91 dst, dstRowStride, 3);
92
93 free((void *) tempImage);
94
95 return GL_TRUE;
96 }
97
98
99 /**
100 * Store user's image in rgba_dxt1 format.
101 */
102 GLboolean
_mesa_texstore_rgba_dxt1(TEXSTORE_PARAMS)103 _mesa_texstore_rgba_dxt1(TEXSTORE_PARAMS)
104 {
105 const GLubyte *pixels;
106 GLubyte *dst;
107 const GLubyte *tempImage = NULL;
108 int rgbaRowStride = 4 * srcWidth * sizeof(GLubyte);
109
110 assert(dstFormat == MESA_FORMAT_RGBA_DXT1 ||
111 dstFormat == MESA_FORMAT_SRGBA_DXT1);
112
113 if (srcFormat != GL_RGBA ||
114 srcType != GL_UNSIGNED_BYTE ||
115 ctx->_ImageTransferState ||
116 _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType) != rgbaRowStride ||
117 srcPacking->SkipImages ||
118 srcPacking->SwapBytes) {
119 /* convert image to RGBA/GLubyte */
120 GLubyte *tempImageSlices[1];
121 tempImage = malloc(srcWidth * srcHeight * 4 * sizeof(GLubyte));
122 if (!tempImage)
123 return GL_FALSE; /* out of memory */
124 tempImageSlices[0] = (GLubyte *) tempImage;
125 _mesa_texstore(ctx, dims,
126 baseInternalFormat,
127 #if UTIL_ARCH_LITTLE_ENDIAN
128 MESA_FORMAT_R8G8B8A8_UNORM,
129 #else
130 MESA_FORMAT_A8B8G8R8_UNORM,
131 #endif
132 rgbaRowStride, tempImageSlices,
133 srcWidth, srcHeight, srcDepth,
134 srcFormat, srcType, srcAddr,
135 srcPacking);
136 pixels = tempImage;
137 srcFormat = GL_RGBA;
138 }
139 else {
140 pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight,
141 srcFormat, srcType, 0, 0);
142 }
143
144 dst = dstSlices[0];
145
146 tx_compress_dxt1(4, srcWidth, srcHeight, pixels, dst, dstRowStride, 4);
147
148 free((void*) tempImage);
149
150 return GL_TRUE;
151 }
152
153
154 /**
155 * Store user's image in rgba_dxt3 format.
156 */
157 GLboolean
_mesa_texstore_rgba_dxt3(TEXSTORE_PARAMS)158 _mesa_texstore_rgba_dxt3(TEXSTORE_PARAMS)
159 {
160 const GLubyte *pixels;
161 GLubyte *dst;
162 const GLubyte *tempImage = NULL;
163 int rgbaRowStride = 4 * srcWidth * sizeof(GLubyte);
164
165 assert(dstFormat == MESA_FORMAT_RGBA_DXT3 ||
166 dstFormat == MESA_FORMAT_SRGBA_DXT3);
167
168 if (srcFormat != GL_RGBA ||
169 srcType != GL_UNSIGNED_BYTE ||
170 ctx->_ImageTransferState ||
171 _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType) != rgbaRowStride ||
172 srcPacking->SkipImages ||
173 srcPacking->SwapBytes) {
174 /* convert image to RGBA/GLubyte */
175 GLubyte *tempImageSlices[1];
176 tempImage = malloc(srcWidth * srcHeight * 4 * sizeof(GLubyte));
177 if (!tempImage)
178 return GL_FALSE; /* out of memory */
179 tempImageSlices[0] = (GLubyte *) tempImage;
180 _mesa_texstore(ctx, dims,
181 baseInternalFormat,
182 #if UTIL_ARCH_LITTLE_ENDIAN
183 MESA_FORMAT_R8G8B8A8_UNORM,
184 #else
185 MESA_FORMAT_A8B8G8R8_UNORM,
186 #endif
187 rgbaRowStride, tempImageSlices,
188 srcWidth, srcHeight, srcDepth,
189 srcFormat, srcType, srcAddr,
190 srcPacking);
191 pixels = tempImage;
192 }
193 else {
194 pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight,
195 srcFormat, srcType, 0, 0);
196 }
197
198 dst = dstSlices[0];
199
200 tx_compress_dxt3(4, srcWidth, srcHeight, pixels, dst, dstRowStride);
201
202 free((void *) tempImage);
203
204 return GL_TRUE;
205 }
206
207
208 /**
209 * Store user's image in rgba_dxt5 format.
210 */
211 GLboolean
_mesa_texstore_rgba_dxt5(TEXSTORE_PARAMS)212 _mesa_texstore_rgba_dxt5(TEXSTORE_PARAMS)
213 {
214 const GLubyte *pixels;
215 GLubyte *dst;
216 const GLubyte *tempImage = NULL;
217 int rgbaRowStride = 4 * srcWidth * sizeof(GLubyte);
218
219 assert(dstFormat == MESA_FORMAT_RGBA_DXT5 ||
220 dstFormat == MESA_FORMAT_SRGBA_DXT5);
221
222 if (srcFormat != GL_RGBA ||
223 srcType != GL_UNSIGNED_BYTE ||
224 ctx->_ImageTransferState ||
225 _mesa_image_row_stride(srcPacking, srcWidth, srcFormat, srcType) != rgbaRowStride ||
226 srcPacking->SkipImages ||
227 srcPacking->SwapBytes) {
228 /* convert image to RGBA/GLubyte */
229 GLubyte *tempImageSlices[1];
230 tempImage = malloc(srcWidth * srcHeight * 4 * sizeof(GLubyte));
231 if (!tempImage)
232 return GL_FALSE; /* out of memory */
233 tempImageSlices[0] = (GLubyte *) tempImage;
234 _mesa_texstore(ctx, dims,
235 baseInternalFormat,
236 #if UTIL_ARCH_LITTLE_ENDIAN
237 MESA_FORMAT_R8G8B8A8_UNORM,
238 #else
239 MESA_FORMAT_A8B8G8R8_UNORM,
240 #endif
241 rgbaRowStride, tempImageSlices,
242 srcWidth, srcHeight, srcDepth,
243 srcFormat, srcType, srcAddr,
244 srcPacking);
245 pixels = tempImage;
246 }
247 else {
248 pixels = _mesa_image_address2d(srcPacking, srcAddr, srcWidth, srcHeight,
249 srcFormat, srcType, 0, 0);
250 }
251
252 dst = dstSlices[0];
253
254 tx_compress_dxt5(4, srcWidth, srcHeight, pixels, dst, dstRowStride);
255
256 free((void *) tempImage);
257
258 return GL_TRUE;
259 }
260
261
262 static void
fetch_rgb_dxt1(const GLubyte * map,GLint rowStride,GLint i,GLint j,GLfloat * texel)263 fetch_rgb_dxt1(const GLubyte *map,
264 GLint rowStride, GLint i, GLint j, GLfloat *texel)
265 {
266 GLubyte tex[4];
267 fetch_2d_texel_rgb_dxt1(rowStride, map, i, j, tex);
268 texel[RCOMP] = UBYTE_TO_FLOAT(tex[RCOMP]);
269 texel[GCOMP] = UBYTE_TO_FLOAT(tex[GCOMP]);
270 texel[BCOMP] = UBYTE_TO_FLOAT(tex[BCOMP]);
271 texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]);
272 }
273
274 static void
fetch_rgba_dxt1(const GLubyte * map,GLint rowStride,GLint i,GLint j,GLfloat * texel)275 fetch_rgba_dxt1(const GLubyte *map,
276 GLint rowStride, GLint i, GLint j, GLfloat *texel)
277 {
278 GLubyte tex[4];
279 fetch_2d_texel_rgba_dxt1(rowStride, map, i, j, tex);
280 texel[RCOMP] = UBYTE_TO_FLOAT(tex[RCOMP]);
281 texel[GCOMP] = UBYTE_TO_FLOAT(tex[GCOMP]);
282 texel[BCOMP] = UBYTE_TO_FLOAT(tex[BCOMP]);
283 texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]);
284 }
285
286 static void
fetch_rgba_dxt3(const GLubyte * map,GLint rowStride,GLint i,GLint j,GLfloat * texel)287 fetch_rgba_dxt3(const GLubyte *map,
288 GLint rowStride, GLint i, GLint j, GLfloat *texel)
289 {
290 GLubyte tex[4];
291 fetch_2d_texel_rgba_dxt3(rowStride, map, i, j, tex);
292 texel[RCOMP] = UBYTE_TO_FLOAT(tex[RCOMP]);
293 texel[GCOMP] = UBYTE_TO_FLOAT(tex[GCOMP]);
294 texel[BCOMP] = UBYTE_TO_FLOAT(tex[BCOMP]);
295 texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]);
296 }
297
298 static void
fetch_rgba_dxt5(const GLubyte * map,GLint rowStride,GLint i,GLint j,GLfloat * texel)299 fetch_rgba_dxt5(const GLubyte *map,
300 GLint rowStride, GLint i, GLint j, GLfloat *texel)
301 {
302 GLubyte tex[4];
303 fetch_2d_texel_rgba_dxt5(rowStride, map, i, j, tex);
304 texel[RCOMP] = UBYTE_TO_FLOAT(tex[RCOMP]);
305 texel[GCOMP] = UBYTE_TO_FLOAT(tex[GCOMP]);
306 texel[BCOMP] = UBYTE_TO_FLOAT(tex[BCOMP]);
307 texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]);
308 }
309
310
311 static void
fetch_srgb_dxt1(const GLubyte * map,GLint rowStride,GLint i,GLint j,GLfloat * texel)312 fetch_srgb_dxt1(const GLubyte *map,
313 GLint rowStride, GLint i, GLint j, GLfloat *texel)
314 {
315 GLubyte tex[4];
316 fetch_2d_texel_rgb_dxt1(rowStride, map, i, j, tex);
317 texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(tex[RCOMP]);
318 texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(tex[GCOMP]);
319 texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(tex[BCOMP]);
320 texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]);
321 }
322
323 static void
fetch_srgba_dxt1(const GLubyte * map,GLint rowStride,GLint i,GLint j,GLfloat * texel)324 fetch_srgba_dxt1(const GLubyte *map,
325 GLint rowStride, GLint i, GLint j, GLfloat *texel)
326 {
327 GLubyte tex[4];
328 fetch_2d_texel_rgba_dxt1(rowStride, map, i, j, tex);
329 texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(tex[RCOMP]);
330 texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(tex[GCOMP]);
331 texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(tex[BCOMP]);
332 texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]);
333 }
334
335 static void
fetch_srgba_dxt3(const GLubyte * map,GLint rowStride,GLint i,GLint j,GLfloat * texel)336 fetch_srgba_dxt3(const GLubyte *map,
337 GLint rowStride, GLint i, GLint j, GLfloat *texel)
338 {
339 GLubyte tex[4];
340 fetch_2d_texel_rgba_dxt3(rowStride, map, i, j, tex);
341 texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(tex[RCOMP]);
342 texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(tex[GCOMP]);
343 texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(tex[BCOMP]);
344 texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]);
345 }
346
347 static void
fetch_srgba_dxt5(const GLubyte * map,GLint rowStride,GLint i,GLint j,GLfloat * texel)348 fetch_srgba_dxt5(const GLubyte *map,
349 GLint rowStride, GLint i, GLint j, GLfloat *texel)
350 {
351 GLubyte tex[4];
352 fetch_2d_texel_rgba_dxt5(rowStride, map, i, j, tex);
353 texel[RCOMP] = util_format_srgb_8unorm_to_linear_float(tex[RCOMP]);
354 texel[GCOMP] = util_format_srgb_8unorm_to_linear_float(tex[GCOMP]);
355 texel[BCOMP] = util_format_srgb_8unorm_to_linear_float(tex[BCOMP]);
356 texel[ACOMP] = UBYTE_TO_FLOAT(tex[ACOMP]);
357 }
358
359
360
361 compressed_fetch_func
_mesa_get_dxt_fetch_func(mesa_format format)362 _mesa_get_dxt_fetch_func(mesa_format format)
363 {
364 switch (format) {
365 case MESA_FORMAT_RGB_DXT1:
366 return fetch_rgb_dxt1;
367 case MESA_FORMAT_RGBA_DXT1:
368 return fetch_rgba_dxt1;
369 case MESA_FORMAT_RGBA_DXT3:
370 return fetch_rgba_dxt3;
371 case MESA_FORMAT_RGBA_DXT5:
372 return fetch_rgba_dxt5;
373 case MESA_FORMAT_SRGB_DXT1:
374 return fetch_srgb_dxt1;
375 case MESA_FORMAT_SRGBA_DXT1:
376 return fetch_srgba_dxt1;
377 case MESA_FORMAT_SRGBA_DXT3:
378 return fetch_srgba_dxt3;
379 case MESA_FORMAT_SRGBA_DXT5:
380 return fetch_srgba_dxt5;
381 default:
382 return NULL;
383 }
384 }
385