projects / mesa.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
Merge remote branch 'origin/master' into lp-setup-llvm
[mesa.git] / src / mesa / main / formats.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.7
4 *
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (c) 2008-2009 VMware, Inc.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26
27 #include "imports.h"
28 #include "formats.h"
29 #include "mfeatures.h"
30
31
32 /**
33 * Information about texture formats.
34 */
35 struct gl_format_info
36 {
37 gl_format Name;
38
39 /** text name for debugging */
40 const char *StrName;
41
42 /**
43 * Base format is one of GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE,
44 * GL_LUMINANCE_ALPHA, GL_INTENSITY, GL_YCBCR_MESA, GL_COLOR_INDEX,
45 * GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
46 */
47 GLenum BaseFormat;
48
49 /**
50 * Logical data type: one of GL_UNSIGNED_NORMALIZED, GL_SIGNED_NORMALED,
51 * GL_UNSIGNED_INT, GL_INT, GL_FLOAT.
52 */
53 GLenum DataType;
54
55 GLubyte RedBits;
56 GLubyte GreenBits;
57 GLubyte BlueBits;
58 GLubyte AlphaBits;
59 GLubyte LuminanceBits;
60 GLubyte IntensityBits;
61 GLubyte IndexBits;
62 GLubyte DepthBits;
63 GLubyte StencilBits;
64
65 /**
66 * To describe compressed formats. If not compressed, Width=Height=1.
67 */
68 GLubyte BlockWidth, BlockHeight;
69 GLubyte BytesPerBlock;
70 };
71
72
73 /**
74 * Info about each format.
75 * These must be in the same order as the MESA_FORMAT_* enums so that
76 * we can do lookups without searching.
77 */
78 static struct gl_format_info format_info[MESA_FORMAT_COUNT] =
79 {
80 {
81 MESA_FORMAT_NONE, /* Name */
82 "MESA_FORMAT_NONE", /* StrName */
83 GL_NONE, /* BaseFormat */
84 GL_NONE, /* DataType */
85 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
86 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
87 0, 0, 0 /* BlockWidth/Height,Bytes */
88 },
89 {
90 MESA_FORMAT_RGBA8888, /* Name */
91 "MESA_FORMAT_RGBA8888", /* StrName */
92 GL_RGBA, /* BaseFormat */
93 GL_UNSIGNED_NORMALIZED, /* DataType */
94 8, 8, 8, 8, /* Red/Green/Blue/AlphaBits */
95 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
96 1, 1, 4 /* BlockWidth/Height,Bytes */
97 },
98 {
99 MESA_FORMAT_RGBA8888_REV, /* Name */
100 "MESA_FORMAT_RGBA8888_REV", /* StrName */
101 GL_RGBA, /* BaseFormat */
102 GL_UNSIGNED_NORMALIZED, /* DataType */
103 8, 8, 8, 8, /* Red/Green/Blue/AlphaBits */
104 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
105 1, 1, 4 /* BlockWidth/Height,Bytes */
106 },
107 {
108 MESA_FORMAT_ARGB8888, /* Name */
109 "MESA_FORMAT_ARGB8888", /* StrName */
110 GL_RGBA, /* BaseFormat */
111 GL_UNSIGNED_NORMALIZED, /* DataType */
112 8, 8, 8, 8, /* Red/Green/Blue/AlphaBits */
113 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
114 1, 1, 4 /* BlockWidth/Height,Bytes */
115 },
116 {
117 MESA_FORMAT_ARGB8888_REV, /* Name */
118 "MESA_FORMAT_ARGB8888_REV", /* StrName */
119 GL_RGBA, /* BaseFormat */
120 GL_UNSIGNED_NORMALIZED, /* DataType */
121 8, 8, 8, 8, /* Red/Green/Blue/AlphaBits */
122 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
123 1, 1, 4 /* BlockWidth/Height,Bytes */
124 },
125 {
126 MESA_FORMAT_XRGB8888, /* Name */
127 "MESA_FORMAT_XRGB8888", /* StrName */
128 GL_RGB, /* BaseFormat */
129 GL_UNSIGNED_NORMALIZED, /* DataType */
130 8, 8, 8, 0, /* Red/Green/Blue/AlphaBits */
131 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
132 1, 1, 4 /* BlockWidth/Height,Bytes */
133 },
134 {
135 MESA_FORMAT_XRGB8888_REV, /* Name */
136 "MESA_FORMAT_XRGB8888_REV", /* StrName */
137 GL_RGB, /* BaseFormat */
138 GL_UNSIGNED_NORMALIZED, /* DataType */
139 8, 8, 8, 0, /* Red/Green/Blue/AlphaBits */
140 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
141 1, 1, 4 /* BlockWidth/Height,Bytes */
142 },
143 {
144 MESA_FORMAT_RGB888, /* Name */
145 "MESA_FORMAT_RGB888", /* StrName */
146 GL_RGB, /* BaseFormat */
147 GL_UNSIGNED_NORMALIZED, /* DataType */
148 8, 8, 8, 0, /* Red/Green/Blue/AlphaBits */
149 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
150 1, 1, 3 /* BlockWidth/Height,Bytes */
151 },
152 {
153 MESA_FORMAT_BGR888, /* Name */
154 "MESA_FORMAT_BGR888", /* StrName */
155 GL_RGB, /* BaseFormat */
156 GL_UNSIGNED_NORMALIZED, /* DataType */
157 8, 8, 8, 0, /* Red/Green/Blue/AlphaBits */
158 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
159 1, 1, 3 /* BlockWidth/Height,Bytes */
160 },
161 {
162 MESA_FORMAT_RGB565, /* Name */
163 "MESA_FORMAT_RGB565", /* StrName */
164 GL_RGB, /* BaseFormat */
165 GL_UNSIGNED_NORMALIZED, /* DataType */
166 5, 6, 5, 0, /* Red/Green/Blue/AlphaBits */
167 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
168 1, 1, 2 /* BlockWidth/Height,Bytes */
169 },
170 {
171 MESA_FORMAT_RGB565_REV, /* Name */
172 "MESA_FORMAT_RGB565_REV", /* StrName */
173 GL_RGB, /* BaseFormat */
174 GL_UNSIGNED_NORMALIZED, /* DataType */
175 5, 6, 5, 0, /* Red/Green/Blue/AlphaBits */
176 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
177 1, 1, 2 /* BlockWidth/Height,Bytes */
178 },
179 {
180 MESA_FORMAT_ARGB4444, /* Name */
181 "MESA_FORMAT_ARGB4444", /* StrName */
182 GL_RGBA, /* BaseFormat */
183 GL_UNSIGNED_NORMALIZED, /* DataType */
184 4, 4, 4, 4, /* Red/Green/Blue/AlphaBits */
185 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
186 1, 1, 2 /* BlockWidth/Height,Bytes */
187 },
188 {
189 MESA_FORMAT_ARGB4444_REV, /* Name */
190 "MESA_FORMAT_ARGB4444_REV", /* StrName */
191 GL_RGBA, /* BaseFormat */
192 GL_UNSIGNED_NORMALIZED, /* DataType */
193 4, 4, 4, 4, /* Red/Green/Blue/AlphaBits */
194 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
195 1, 1, 2 /* BlockWidth/Height,Bytes */
196 },
197 {
198 MESA_FORMAT_RGBA5551, /* Name */
199 "MESA_FORMAT_RGBA5551", /* StrName */
200 GL_RGBA, /* BaseFormat */
201 GL_UNSIGNED_NORMALIZED, /* DataType */
202 5, 5, 5, 1, /* Red/Green/Blue/AlphaBits */
203 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
204 1, 1, 2 /* BlockWidth/Height,Bytes */
205 },
206 {
207 MESA_FORMAT_ARGB1555, /* Name */
208 "MESA_FORMAT_ARGB1555", /* StrName */
209 GL_RGBA, /* BaseFormat */
210 GL_UNSIGNED_NORMALIZED, /* DataType */
211 5, 5, 5, 1, /* Red/Green/Blue/AlphaBits */
212 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
213 1, 1, 2 /* BlockWidth/Height,Bytes */
214 },
215 {
216 MESA_FORMAT_ARGB1555_REV, /* Name */
217 "MESA_FORMAT_ARGB1555_REV", /* StrName */
218 GL_RGBA, /* BaseFormat */
219 GL_UNSIGNED_NORMALIZED, /* DataType */
220 5, 5, 5, 1, /* Red/Green/Blue/AlphaBits */
221 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
222 1, 1, 2 /* BlockWidth/Height,Bytes */
223 },
224 {
225 MESA_FORMAT_AL88, /* Name */
226 "MESA_FORMAT_AL88", /* StrName */
227 GL_LUMINANCE_ALPHA, /* BaseFormat */
228 GL_UNSIGNED_NORMALIZED, /* DataType */
229 0, 0, 0, 8, /* Red/Green/Blue/AlphaBits */
230 8, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
231 1, 1, 2 /* BlockWidth/Height,Bytes */
232 },
233 {
234 MESA_FORMAT_AL88_REV, /* Name */
235 "MESA_FORMAT_AL88_REV", /* StrName */
236 GL_LUMINANCE_ALPHA, /* BaseFormat */
237 GL_UNSIGNED_NORMALIZED, /* DataType */
238 0, 0, 0, 8, /* Red/Green/Blue/AlphaBits */
239 8, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
240 1, 1, 2 /* BlockWidth/Height,Bytes */
241 },
242 {
243 MESA_FORMAT_AL1616, /* Name */
244 "MESA_FORMAT_AL1616", /* StrName */
245 GL_LUMINANCE_ALPHA, /* BaseFormat */
246 GL_UNSIGNED_NORMALIZED, /* DataType */
247 0, 0, 0, 16, /* Red/Green/Blue/AlphaBits */
248 16, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
249 1, 1, 4 /* BlockWidth/Height,Bytes */
250 },
251 {
252 MESA_FORMAT_AL1616_REV, /* Name */
253 "MESA_FORMAT_AL1616_REV", /* StrName */
254 GL_LUMINANCE_ALPHA, /* BaseFormat */
255 GL_UNSIGNED_NORMALIZED, /* DataType */
256 0, 0, 0, 16, /* Red/Green/Blue/AlphaBits */
257 16, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
258 1, 1, 4 /* BlockWidth/Height,Bytes */
259 },
260 {
261 MESA_FORMAT_RGB332, /* Name */
262 "MESA_FORMAT_RGB332", /* StrName */
263 GL_RGB, /* BaseFormat */
264 GL_UNSIGNED_NORMALIZED, /* DataType */
265 3, 3, 2, 0, /* Red/Green/Blue/AlphaBits */
266 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
267 1, 1, 1 /* BlockWidth/Height,Bytes */
268 },
269 {
270 MESA_FORMAT_A8, /* Name */
271 "MESA_FORMAT_A8", /* StrName */
272 GL_ALPHA, /* BaseFormat */
273 GL_UNSIGNED_NORMALIZED, /* DataType */
274 0, 0, 0, 8, /* Red/Green/Blue/AlphaBits */
275 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
276 1, 1, 1 /* BlockWidth/Height,Bytes */
277 },
278 {
279 MESA_FORMAT_L8, /* Name */
280 "MESA_FORMAT_L8", /* StrName */
281 GL_LUMINANCE, /* BaseFormat */
282 GL_UNSIGNED_NORMALIZED, /* DataType */
283 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
284 8, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
285 1, 1, 1 /* BlockWidth/Height,Bytes */
286 },
287 {
288 MESA_FORMAT_I8, /* Name */
289 "MESA_FORMAT_I8", /* StrName */
290 GL_INTENSITY, /* BaseFormat */
291 GL_UNSIGNED_NORMALIZED, /* DataType */
292 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
293 0, 8, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
294 1, 1, 1 /* BlockWidth/Height,Bytes */
295 },
296 {
297 MESA_FORMAT_CI8, /* Name */
298 "MESA_FORMAT_CI8", /* StrName */
299 GL_COLOR_INDEX, /* BaseFormat */
300 GL_UNSIGNED_INT, /* DataType */
301 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
302 0, 0, 8, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
303 1, 1, 1 /* BlockWidth/Height,Bytes */
304 },
305 {
306 MESA_FORMAT_YCBCR, /* Name */
307 "MESA_FORMAT_YCBCR", /* StrName */
308 GL_YCBCR_MESA, /* BaseFormat */
309 GL_UNSIGNED_NORMALIZED, /* DataType */
310 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
311 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
312 1, 1, 2 /* BlockWidth/Height,Bytes */
313 },
314 {
315 MESA_FORMAT_YCBCR_REV, /* Name */
316 "MESA_FORMAT_YCBCR_REV", /* StrName */
317 GL_YCBCR_MESA, /* BaseFormat */
318 GL_UNSIGNED_NORMALIZED, /* DataType */
319 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
320 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
321 1, 1, 2 /* BlockWidth/Height,Bytes */
322 },
323 {
324 MESA_FORMAT_R8,
325 "MESA_FORMAT_R8",
326 GL_RED,
327 GL_UNSIGNED_NORMALIZED,
328 8, 0, 0, 0,
329 0, 0, 0, 0, 0,
330 1, 1, 1
331 },
332 {
333 MESA_FORMAT_RG88,
334 "MESA_FORMAT_RG88",
335 GL_RG,
336 GL_UNSIGNED_NORMALIZED,
337 8, 8, 0, 0,
338 0, 0, 0, 0, 0,
339 1, 1, 2
340 },
341 {
342 MESA_FORMAT_RG88_REV,
343 "MESA_FORMAT_RG88_REV",
344 GL_RG,
345 GL_UNSIGNED_NORMALIZED,
346 8, 8, 0, 0,
347 0, 0, 0, 0, 0,
348 1, 1, 2
349 },
350 {
351 MESA_FORMAT_R16,
352 "MESA_FORMAT_R16",
353 GL_RED,
354 GL_UNSIGNED_NORMALIZED,
355 16, 0, 0, 0,
356 0, 0, 0, 0, 0,
357 1, 1, 2
358 },
359 {
360 MESA_FORMAT_RG1616,
361 "MESA_FORMAT_RG1616",
362 GL_RG,
363 GL_UNSIGNED_NORMALIZED,
364 16, 16, 0, 0,
365 0, 0, 0, 0, 0,
366 1, 1, 4
367 },
368 {
369 MESA_FORMAT_RG1616_REV,
370 "MESA_FORMAT_RG1616_REV",
371 GL_RG,
372 GL_UNSIGNED_NORMALIZED,
373 16, 16, 0, 0,
374 0, 0, 0, 0, 0,
375 1, 1, 4
376 },
377 {
378 MESA_FORMAT_Z24_S8, /* Name */
379 "MESA_FORMAT_Z24_S8", /* StrName */
380 GL_DEPTH_STENCIL, /* BaseFormat */
381 GL_UNSIGNED_INT, /* DataType */
382 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
383 0, 0, 0, 24, 8, /* Lum/Int/Index/Depth/StencilBits */
384 1, 1, 4 /* BlockWidth/Height,Bytes */
385 },
386 {
387 MESA_FORMAT_S8_Z24, /* Name */
388 "MESA_FORMAT_S8_Z24", /* StrName */
389 GL_DEPTH_STENCIL, /* BaseFormat */
390 GL_UNSIGNED_INT, /* DataType */
391 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
392 0, 0, 0, 24, 8, /* Lum/Int/Index/Depth/StencilBits */
393 1, 1, 4 /* BlockWidth/Height,Bytes */
394 },
395 {
396 MESA_FORMAT_Z16, /* Name */
397 "MESA_FORMAT_Z16", /* StrName */
398 GL_DEPTH_COMPONENT, /* BaseFormat */
399 GL_UNSIGNED_INT, /* DataType */
400 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
401 0, 0, 0, 16, 0, /* Lum/Int/Index/Depth/StencilBits */
402 1, 1, 2 /* BlockWidth/Height,Bytes */
403 },
404 {
405 MESA_FORMAT_X8_Z24, /* Name */
406 "MESA_FORMAT_X8_Z24", /* StrName */
407 GL_DEPTH_COMPONENT, /* BaseFormat */
408 GL_UNSIGNED_INT, /* DataType */
409 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
410 0, 0, 0, 24, 0, /* Lum/Int/Index/Depth/StencilBits */
411 1, 1, 4 /* BlockWidth/Height,Bytes */
412 },
413 {
414 MESA_FORMAT_Z24_X8, /* Name */
415 "MESA_FORMAT_Z24_X8", /* StrName */
416 GL_DEPTH_COMPONENT, /* BaseFormat */
417 GL_UNSIGNED_INT, /* DataType */
418 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
419 0, 0, 0, 24, 0, /* Lum/Int/Index/Depth/StencilBits */
420 1, 1, 4 /* BlockWidth/Height,Bytes */
421 },
422 {
423 MESA_FORMAT_Z32, /* Name */
424 "MESA_FORMAT_Z32", /* StrName */
425 GL_DEPTH_COMPONENT, /* BaseFormat */
426 GL_UNSIGNED_INT, /* DataType */
427 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
428 0, 0, 0, 32, 0, /* Lum/Int/Index/Depth/StencilBits */
429 1, 1, 4 /* BlockWidth/Height,Bytes */
430 },
431 {
432 MESA_FORMAT_S8, /* Name */
433 "MESA_FORMAT_S8", /* StrName */
434 GL_STENCIL_INDEX, /* BaseFormat */
435 GL_UNSIGNED_INT, /* DataType */
436 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
437 0, 0, 0, 0, 8, /* Lum/Int/Index/Depth/StencilBits */
438 1, 1, 1 /* BlockWidth/Height,Bytes */
439 },
440 {
441 MESA_FORMAT_SRGB8,
442 "MESA_FORMAT_SRGB8",
443 GL_RGB,
444 GL_UNSIGNED_NORMALIZED,
445 8, 8, 8, 0,
446 0, 0, 0, 0, 0,
447 1, 1, 3
448 },
449 {
450 MESA_FORMAT_SRGBA8,
451 "MESA_FORMAT_SRGBA8",
452 GL_RGBA,
453 GL_UNSIGNED_NORMALIZED,
454 8, 8, 8, 8,
455 0, 0, 0, 0, 0,
456 1, 1, 4
457 },
458 {
459 MESA_FORMAT_SARGB8,
460 "MESA_FORMAT_SARGB8",
461 GL_RGBA,
462 GL_UNSIGNED_NORMALIZED,
463 8, 8, 8, 8,
464 0, 0, 0, 0, 0,
465 1, 1, 4
466 },
467 {
468 MESA_FORMAT_SL8,
469 "MESA_FORMAT_SL8",
470 GL_LUMINANCE,
471 GL_UNSIGNED_NORMALIZED,
472 0, 0, 0, 0,
473 8, 0, 0, 0, 0,
474 1, 1, 1
475 },
476 {
477 MESA_FORMAT_SLA8,
478 "MESA_FORMAT_SLA8",
479 GL_LUMINANCE_ALPHA,
480 GL_UNSIGNED_NORMALIZED,
481 0, 0, 0, 8,
482 8, 0, 0, 0, 0,
483 1, 1, 2
484 },
485 {
486 MESA_FORMAT_SRGB_DXT1, /* Name */
487 "MESA_FORMAT_SRGB_DXT1", /* StrName */
488 GL_RGB, /* BaseFormat */
489 GL_UNSIGNED_NORMALIZED, /* DataType */
490 4, 4, 4, 0, /* approx Red/Green/Blue/AlphaBits */
491 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
492 4, 4, 8 /* 8 bytes per 4x4 block */
493 },
494 {
495 MESA_FORMAT_SRGBA_DXT1,
496 "MESA_FORMAT_SRGBA_DXT1",
497 GL_RGBA,
498 GL_UNSIGNED_NORMALIZED,
499 4, 4, 4, 4,
500 0, 0, 0, 0, 0,
501 4, 4, 8 /* 8 bytes per 4x4 block */
502 },
503 {
504 MESA_FORMAT_SRGBA_DXT3,
505 "MESA_FORMAT_SRGBA_DXT3",
506 GL_RGBA,
507 GL_UNSIGNED_NORMALIZED,
508 4, 4, 4, 4,
509 0, 0, 0, 0, 0,
510 4, 4, 16 /* 16 bytes per 4x4 block */
511 },
512 {
513 MESA_FORMAT_SRGBA_DXT5,
514 "MESA_FORMAT_SRGBA_DXT5",
515 GL_RGBA,
516 GL_UNSIGNED_NORMALIZED,
517 4, 4, 4, 4,
518 0, 0, 0, 0, 0,
519 4, 4, 16 /* 16 bytes per 4x4 block */
520 },
521
522 {
523 MESA_FORMAT_RGB_FXT1,
524 "MESA_FORMAT_RGB_FXT1",
525 GL_RGB,
526 GL_UNSIGNED_NORMALIZED,
527 4, 4, 4, 0, /* approx Red/Green/BlueBits */
528 0, 0, 0, 0, 0,
529 8, 4, 16 /* 16 bytes per 8x4 block */
530 },
531 {
532 MESA_FORMAT_RGBA_FXT1,
533 "MESA_FORMAT_RGBA_FXT1",
534 GL_RGBA,
535 GL_UNSIGNED_NORMALIZED,
536 4, 4, 4, 1, /* approx Red/Green/Blue/AlphaBits */
537 0, 0, 0, 0, 0,
538 8, 4, 16 /* 16 bytes per 8x4 block */
539 },
540
541 {
542 MESA_FORMAT_RGB_DXT1, /* Name */
543 "MESA_FORMAT_RGB_DXT1", /* StrName */
544 GL_RGB, /* BaseFormat */
545 GL_UNSIGNED_NORMALIZED, /* DataType */
546 4, 4, 4, 0, /* approx Red/Green/Blue/AlphaBits */
547 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
548 4, 4, 8 /* 8 bytes per 4x4 block */
549 },
550 {
551 MESA_FORMAT_RGBA_DXT1,
552 "MESA_FORMAT_RGBA_DXT1",
553 GL_RGBA,
554 GL_UNSIGNED_NORMALIZED,
555 4, 4, 4, 4,
556 0, 0, 0, 0, 0,
557 4, 4, 8 /* 8 bytes per 4x4 block */
558 },
559 {
560 MESA_FORMAT_RGBA_DXT3,
561 "MESA_FORMAT_RGBA_DXT3",
562 GL_RGBA,
563 GL_UNSIGNED_NORMALIZED,
564 4, 4, 4, 4,
565 0, 0, 0, 0, 0,
566 4, 4, 16 /* 16 bytes per 4x4 block */
567 },
568 {
569 MESA_FORMAT_RGBA_DXT5,
570 "MESA_FORMAT_RGBA_DXT5",
571 GL_RGBA,
572 GL_UNSIGNED_NORMALIZED,
573 4, 4, 4, 4,
574 0, 0, 0, 0, 0,
575 4, 4, 16 /* 16 bytes per 4x4 block */
576 },
577 {
578 MESA_FORMAT_RGBA_FLOAT32,
579 "MESA_FORMAT_RGBA_FLOAT32",
580 GL_RGBA,
581 GL_FLOAT,
582 32, 32, 32, 32,
583 0, 0, 0, 0, 0,
584 1, 1, 16
585 },
586 {
587 MESA_FORMAT_RGBA_FLOAT16,
588 "MESA_FORMAT_RGBA_FLOAT16",
589 GL_RGBA,
590 GL_FLOAT,
591 16, 16, 16, 16,
592 0, 0, 0, 0, 0,
593 1, 1, 8
594 },
595 {
596 MESA_FORMAT_RGB_FLOAT32,
597 "MESA_FORMAT_RGB_FLOAT32",
598 GL_RGB,
599 GL_FLOAT,
600 32, 32, 32, 0,
601 0, 0, 0, 0, 0,
602 1, 1, 12
603 },
604 {
605 MESA_FORMAT_RGB_FLOAT16,
606 "MESA_FORMAT_RGB_FLOAT16",
607 GL_RGB,
608 GL_FLOAT,
609 16, 16, 16, 0,
610 0, 0, 0, 0, 0,
611 1, 1, 6
612 },
613 {
614 MESA_FORMAT_ALPHA_FLOAT32,
615 "MESA_FORMAT_ALPHA_FLOAT32",
616 GL_ALPHA,
617 GL_FLOAT,
618 0, 0, 0, 32,
619 0, 0, 0, 0, 0,
620 1, 1, 4
621 },
622 {
623 MESA_FORMAT_ALPHA_FLOAT16,
624 "MESA_FORMAT_ALPHA_FLOAT16",
625 GL_ALPHA,
626 GL_FLOAT,
627 0, 0, 0, 16,
628 0, 0, 0, 0, 0,
629 1, 1, 2
630 },
631 {
632 MESA_FORMAT_LUMINANCE_FLOAT32,
633 "MESA_FORMAT_LUMINANCE_FLOAT32",
634 GL_ALPHA,
635 GL_FLOAT,
636 0, 0, 0, 0,
637 32, 0, 0, 0, 0,
638 1, 1, 4
639 },
640 {
641 MESA_FORMAT_LUMINANCE_FLOAT16,
642 "MESA_FORMAT_LUMINANCE_FLOAT16",
643 GL_ALPHA,
644 GL_FLOAT,
645 0, 0, 0, 0,
646 16, 0, 0, 0, 0,
647 1, 1, 2
648 },
649 {
650 MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
651 "MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32",
652 GL_LUMINANCE_ALPHA,
653 GL_FLOAT,
654 0, 0, 0, 32,
655 32, 0, 0, 0, 0,
656 1, 1, 8
657 },
658 {
659 MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
660 "MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16",
661 GL_LUMINANCE_ALPHA,
662 GL_FLOAT,
663 0, 0, 0, 16,
664 16, 0, 0, 0, 0,
665 1, 1, 4
666 },
667 {
668 MESA_FORMAT_INTENSITY_FLOAT32,
669 "MESA_FORMAT_INTENSITY_FLOAT32",
670 GL_INTENSITY,
671 GL_FLOAT,
672 0, 0, 0, 0,
673 0, 32, 0, 0, 0,
674 1, 1, 4
675 },
676 {
677 MESA_FORMAT_INTENSITY_FLOAT16,
678 "MESA_FORMAT_INTENSITY_FLOAT16",
679 GL_INTENSITY,
680 GL_FLOAT,
681 0, 0, 0, 0,
682 0, 16, 0, 0, 0,
683 1, 1, 2
684 },
685
686 /* unnormalized signed int formats */
687 {
688 MESA_FORMAT_RGBA_INT8,
689 "MESA_FORMAT_RGBA_INT8",
690 GL_RGBA,
691 GL_INT,
692 8, 8, 8, 8,
693 0, 0, 0, 0, 0,
694 1, 1, 4
695 },
696 {
697 MESA_FORMAT_RGBA_INT16,
698 "MESA_FORMAT_RGBA_INT16",
699 GL_RGBA,
700 GL_INT,
701 16, 16, 16, 16,
702 0, 0, 0, 0, 0,
703 1, 1, 8
704 },
705 {
706 MESA_FORMAT_RGBA_INT32,
707 "MESA_FORMAT_RGBA_INT32",
708 GL_RGBA,
709 GL_INT,
710 32, 32, 32, 32,
711 0, 0, 0, 0, 0,
712 1, 1, 16
713 },
714
715 /* unnormalized unsigned int formats */
716 {
717 MESA_FORMAT_RGBA_UINT8,
718 "MESA_FORMAT_RGBA_UINT8",
719 GL_RGBA,
720 GL_UNSIGNED_INT,
721 8, 8, 8, 8,
722 0, 0, 0, 0, 0,
723 1, 1, 4
724 },
725 {
726 MESA_FORMAT_RGBA_UINT16,
727 "MESA_FORMAT_RGBA_UINT16",
728 GL_RGBA,
729 GL_UNSIGNED_INT,
730 16, 16, 16, 16,
731 0, 0, 0, 0, 0,
732 1, 1, 8
733 },
734 {
735 MESA_FORMAT_RGBA_UINT32,
736 "MESA_FORMAT_RGBA_UINT32",
737 GL_RGBA,
738 GL_UNSIGNED_INT,
739 32, 32, 32, 32,
740 0, 0, 0, 0, 0,
741 1, 1, 16
742 },
743
744
745 {
746 MESA_FORMAT_DUDV8,
747 "MESA_FORMAT_DUDV8",
748 GL_DUDV_ATI,
749 GL_SIGNED_NORMALIZED,
750 0, 0, 0, 0,
751 0, 0, 0, 0, 0,
752 1, 1, 2
753 },
754
755 /* Signed 8 bits / channel */
756 {
757 MESA_FORMAT_SIGNED_R8, /* Name */
758 "MESA_FORMAT_SIGNED_R8", /* StrName */
759 GL_RGBA, /* BaseFormat */
760 GL_SIGNED_NORMALIZED, /* DataType */
761 8, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
762 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
763 1, 1, 1 /* BlockWidth/Height,Bytes */
764 },
765 {
766 MESA_FORMAT_SIGNED_RG88,
767 "MESA_FORMAT_SIGNED_RG88",
768 GL_RGBA,
769 GL_SIGNED_NORMALIZED,
770 8, 8, 0, 0,
771 0, 0, 0, 0, 0,
772 1, 1, 2
773 },
774 {
775 MESA_FORMAT_SIGNED_RGBX8888,
776 "MESA_FORMAT_SIGNED_RGBX8888",
777 GL_RGBA,
778 GL_SIGNED_NORMALIZED,
779 8, 8, 8, 0,
780 0, 0, 0, 0, 0,
781 1, 1, 4 /* 4 bpp, but no alpha */
782 },
783 {
784 MESA_FORMAT_SIGNED_RGBA8888,
785 "MESA_FORMAT_SIGNED_RGBA8888",
786 GL_RGBA,
787 GL_SIGNED_NORMALIZED,
788 8, 8, 8, 8,
789 0, 0, 0, 0, 0,
790 1, 1, 4
791 },
792 {
793 MESA_FORMAT_SIGNED_RGBA8888_REV,
794 "MESA_FORMAT_SIGNED_RGBA8888_REV",
795 GL_RGBA,
796 GL_SIGNED_NORMALIZED,
797 8, 8, 8, 8,
798 0, 0, 0, 0, 0,
799 1, 1, 4
800 },
801
802 /* Signed 16 bits / channel */
803 {
804 MESA_FORMAT_SIGNED_R_16,
805 "MESA_FORMAT_SIGNED_R_16",
806 GL_RGBA,
807 GL_SIGNED_NORMALIZED,
808 16, 0, 0, 0,
809 0, 0, 0, 0, 0,
810 1, 1, 2
811 },
812 {
813 MESA_FORMAT_SIGNED_RG_16,
814 "MESA_FORMAT_SIGNED_RG_16",
815 GL_RGBA,
816 GL_SIGNED_NORMALIZED,
817 16, 16, 0, 0,
818 0, 0, 0, 0, 0,
819 1, 1, 4
820 },
821 {
822 MESA_FORMAT_SIGNED_RGB_16,
823 "MESA_FORMAT_SIGNED_RGB_16",
824 GL_RGBA,
825 GL_SIGNED_NORMALIZED,
826 16, 16, 16, 0,
827 0, 0, 0, 0, 0,
828 1, 1, 6
829 },
830 {
831 MESA_FORMAT_SIGNED_RGBA_16,
832 "MESA_FORMAT_SIGNED_RGBA_16",
833 GL_RGBA,
834 GL_SIGNED_NORMALIZED,
835 16, 16, 16, 16,
836 0, 0, 0, 0, 0,
837 1, 1, 8
838 },
839 {
840 MESA_FORMAT_RGBA_16,
841 "MESA_FORMAT_RGBA_16",
842 GL_RGBA,
843 GL_UNSIGNED_NORMALIZED,
844 16, 16, 16, 16,
845 0, 0, 0, 0, 0,
846 1, 1, 8
847 }
848 };
849
850
851
852 static const struct gl_format_info *
853 _mesa_get_format_info(gl_format format)
854 {
855 const struct gl_format_info *info = &format_info[format];
856 assert(info->Name == format);
857 return info;
858 }
859
860
861 /** Return string name of format (for debugging) */
862 const char *
863 _mesa_get_format_name(gl_format format)
864 {
865 const struct gl_format_info *info = _mesa_get_format_info(format);
866 ASSERT(info->BytesPerBlock);
867 return info->StrName;
868 }
869
870
871
872 /**
873 * Return bytes needed to store a block of pixels in the given format.
874 * Normally, a block is 1x1 (a single pixel). But for compressed formats
875 * a block may be 4x4 or 8x4, etc.
876 */
877 GLuint
878 _mesa_get_format_bytes(gl_format format)
879 {
880 const struct gl_format_info *info = _mesa_get_format_info(format);
881 ASSERT(info->BytesPerBlock);
882 return info->BytesPerBlock;
883 }
884
885
886 /**
887 * Return bits per component for the given format.
888 * \param format one of MESA_FORMAT_x
889 * \param pname the component, such as GL_RED_BITS, GL_TEXTURE_BLUE_BITS, etc.
890 */
891 GLint
892 _mesa_get_format_bits(gl_format format, GLenum pname)
893 {
894 const struct gl_format_info *info = _mesa_get_format_info(format);
895
896 switch (pname) {
897 case GL_RED_BITS:
898 case GL_TEXTURE_RED_SIZE:
899 case GL_RENDERBUFFER_RED_SIZE_EXT:
900 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
901 return info->RedBits;
902 case GL_GREEN_BITS:
903 case GL_TEXTURE_GREEN_SIZE:
904 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
905 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
906 return info->GreenBits;
907 case GL_BLUE_BITS:
908 case GL_TEXTURE_BLUE_SIZE:
909 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
910 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
911 return info->BlueBits;
912 case GL_ALPHA_BITS:
913 case GL_TEXTURE_ALPHA_SIZE:
914 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
915 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
916 return info->AlphaBits;
917 case GL_TEXTURE_INTENSITY_SIZE:
918 return info->IntensityBits;
919 case GL_TEXTURE_LUMINANCE_SIZE:
920 return info->LuminanceBits;
921 case GL_INDEX_BITS:
922 case GL_TEXTURE_INDEX_SIZE_EXT:
923 return info->IndexBits;
924 case GL_DEPTH_BITS:
925 case GL_TEXTURE_DEPTH_SIZE_ARB:
926 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
927 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
928 return info->DepthBits;
929 case GL_STENCIL_BITS:
930 case GL_TEXTURE_STENCIL_SIZE_EXT:
931 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
932 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
933 return info->StencilBits;
934 default:
935 _mesa_problem(NULL, "bad pname in _mesa_get_format_bits()");
936 return 0;
937 }
938 }
939
940
941 /**
942 * Return the data type (or more specifically, the data representation)
943 * for the given format.
944 * The return value will be one of:
945 * GL_UNSIGNED_NORMALIZED = unsigned int representing [0,1]
946 * GL_SIGNED_NORMALIZED = signed int representing [-1, 1]
947 * GL_UNSIGNED_INT = an ordinary unsigned integer
948 * GL_FLOAT = an ordinary float
949 */
950 GLenum
951 _mesa_get_format_datatype(gl_format format)
952 {
953 const struct gl_format_info *info = _mesa_get_format_info(format);
954 return info->DataType;
955 }
956
957
958 /**
959 * Return the basic format for the given type. The result will be
960 * one of GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA,
961 * GL_INTENSITY, GL_YCBCR_MESA, GL_COLOR_INDEX, GL_DEPTH_COMPONENT,
962 * GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
963 */
964 GLenum
965 _mesa_get_format_base_format(gl_format format)
966 {
967 const struct gl_format_info *info = _mesa_get_format_info(format);
968 return info->BaseFormat;
969 }
970
971
972 /**
973 * Return the block size (in pixels) for the given format. Normally
974 * the block size is 1x1. But compressed formats will have block sizes
975 * of 4x4 or 8x4 pixels, etc.
976 * \param bw returns block width in pixels
977 * \param bh returns block height in pixels
978 */
979 void
980 _mesa_get_format_block_size(gl_format format, GLuint *bw, GLuint *bh)
981 {
982 const struct gl_format_info *info = _mesa_get_format_info(format);
983 *bw = info->BlockWidth;
984 *bh = info->BlockHeight;
985 }
986
987
988 /** Is the given format a compressed format? */
989 GLboolean
990 _mesa_is_format_compressed(gl_format format)
991 {
992 const struct gl_format_info *info = _mesa_get_format_info(format);
993 return info->BlockWidth > 1 || info->BlockHeight > 1;
994 }
995
996
997 /**
998 * Determine if the given format represents a packed depth/stencil buffer.
999 */
1000 GLboolean
1001 _mesa_is_format_packed_depth_stencil(gl_format format)
1002 {
1003 const struct gl_format_info *info = _mesa_get_format_info(format);
1004
1005 return info->BaseFormat == GL_DEPTH_STENCIL;
1006 }
1007
1008
1009 /**
1010 * Return color encoding for given format.
1011 * \return GL_LINEAR or GL_SRGB
1012 */
1013 GLenum
1014 _mesa_get_format_color_encoding(gl_format format)
1015 {
1016 /* XXX this info should be encoded in gl_format_info */
1017 switch (format) {
1018 case MESA_FORMAT_SRGB8:
1019 case MESA_FORMAT_SRGBA8:
1020 case MESA_FORMAT_SARGB8:
1021 case MESA_FORMAT_SL8:
1022 case MESA_FORMAT_SLA8:
1023 case MESA_FORMAT_SRGB_DXT1:
1024 case MESA_FORMAT_SRGBA_DXT1:
1025 case MESA_FORMAT_SRGBA_DXT3:
1026 case MESA_FORMAT_SRGBA_DXT5:
1027 return GL_SRGB;
1028 default:
1029 return GL_LINEAR;
1030 }
1031 }
1032
1033
1034 /**
1035 * Return number of bytes needed to store an image of the given size
1036 * in the given format.
1037 */
1038 GLuint
1039 _mesa_format_image_size(gl_format format, GLsizei width,
1040 GLsizei height, GLsizei depth)
1041 {
1042 const struct gl_format_info *info = _mesa_get_format_info(format);
1043 /* Strictly speaking, a conditional isn't needed here */
1044 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
1045 /* compressed format */
1046 const GLuint bw = info->BlockWidth, bh = info->BlockHeight;
1047 const GLuint wblocks = (width + bw - 1) / bw;
1048 const GLuint hblocks = (height + bh - 1) / bh;
1049 const GLuint sz = wblocks * hblocks * info->BytesPerBlock;
1050 return sz;
1051 }
1052 else {
1053 /* non-compressed */
1054 const GLuint sz = width * height * depth * info->BytesPerBlock;
1055 return sz;
1056 }
1057 }
1058
1059
1060
1061 GLint
1062 _mesa_format_row_stride(gl_format format, GLsizei width)
1063 {
1064 const struct gl_format_info *info = _mesa_get_format_info(format);
1065 /* Strictly speaking, a conditional isn't needed here */
1066 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
1067 /* compressed format */
1068 const GLuint bw = info->BlockWidth;
1069 const GLuint wblocks = (width + bw - 1) / bw;
1070 const GLint stride = wblocks * info->BytesPerBlock;
1071 return stride;
1072 }
1073 else {
1074 const GLint stride = width * info->BytesPerBlock;
1075 return stride;
1076 }
1077 }
1078
1079
1080
1081 /**
1082 * Do sanity checking of the format info table.
1083 */
1084 void
1085 _mesa_test_formats(void)
1086 {
1087 GLuint i;
1088
1089 assert(Elements(format_info) == MESA_FORMAT_COUNT);
1090
1091 for (i = 0; i < MESA_FORMAT_COUNT; i++) {
1092 const struct gl_format_info *info = _mesa_get_format_info(i);
1093 assert(info);
1094
1095 assert(info->Name == i);
1096
1097 if (info->Name == MESA_FORMAT_NONE)
1098 continue;
1099
1100 if (info->BlockWidth == 1 && info->BlockHeight == 1) {
1101 if (info->RedBits > 0) {
1102 GLuint t = info->RedBits + info->GreenBits
1103 + info->BlueBits + info->AlphaBits;
1104 assert(t / 8 == info->BytesPerBlock);
1105 (void) t;
1106 }
1107 }
1108
1109 assert(info->DataType == GL_UNSIGNED_NORMALIZED ||
1110 info->DataType == GL_SIGNED_NORMALIZED ||
1111 info->DataType == GL_UNSIGNED_INT ||
1112 info->DataType == GL_FLOAT);
1113
1114 if (info->BaseFormat == GL_RGB) {
1115 assert(info->RedBits > 0);
1116 assert(info->GreenBits > 0);
1117 assert(info->BlueBits > 0);
1118 assert(info->AlphaBits == 0);
1119 assert(info->LuminanceBits == 0);
1120 assert(info->IntensityBits == 0);
1121 }
1122 else if (info->BaseFormat == GL_RGBA) {
1123 assert(info->RedBits > 0);
1124 assert(info->GreenBits > 0);
1125 assert(info->BlueBits > 0);
1126 assert(info->AlphaBits > 0);
1127 assert(info->LuminanceBits == 0);
1128 assert(info->IntensityBits == 0);
1129 }
1130 else if (info->BaseFormat == GL_RG) {
1131 assert(info->RedBits > 0);
1132 assert(info->GreenBits > 0);
1133 assert(info->BlueBits == 0);
1134 assert(info->AlphaBits == 0);
1135 assert(info->LuminanceBits == 0);
1136 assert(info->IntensityBits == 0);
1137 }
1138 else if (info->BaseFormat == GL_RED) {
1139 assert(info->RedBits > 0);
1140 assert(info->GreenBits == 0);
1141 assert(info->BlueBits == 0);
1142 assert(info->AlphaBits == 0);
1143 assert(info->LuminanceBits == 0);
1144 assert(info->IntensityBits == 0);
1145 }
1146 else if (info->BaseFormat == GL_LUMINANCE) {
1147 assert(info->RedBits == 0);
1148 assert(info->GreenBits == 0);
1149 assert(info->BlueBits == 0);
1150 assert(info->AlphaBits == 0);
1151 assert(info->LuminanceBits > 0);
1152 assert(info->IntensityBits == 0);
1153 }
1154 else if (info->BaseFormat == GL_INTENSITY) {
1155 assert(info->RedBits == 0);
1156 assert(info->GreenBits == 0);
1157 assert(info->BlueBits == 0);
1158 assert(info->AlphaBits == 0);
1159 assert(info->LuminanceBits == 0);
1160 assert(info->IntensityBits > 0);
1161 }
1162
1163 }
1164 }
1165
1166
1167
1168 /**
1169 * Return datatype and number of components per texel for the given gl_format.
1170 * Only used for mipmap generation code.
1171 */
1172 void
1173 _mesa_format_to_type_and_comps(gl_format format,
1174 GLenum *datatype, GLuint *comps)
1175 {
1176 switch (format) {
1177 case MESA_FORMAT_RGBA8888:
1178 case MESA_FORMAT_RGBA8888_REV:
1179 case MESA_FORMAT_ARGB8888:
1180 case MESA_FORMAT_ARGB8888_REV:
1181 case MESA_FORMAT_XRGB8888:
1182 *datatype = GL_UNSIGNED_BYTE;
1183 *comps = 4;
1184 return;
1185 case MESA_FORMAT_RGB888:
1186 case MESA_FORMAT_BGR888:
1187 *datatype = GL_UNSIGNED_BYTE;
1188 *comps = 3;
1189 return;
1190 case MESA_FORMAT_RGB565:
1191 case MESA_FORMAT_RGB565_REV:
1192 *datatype = GL_UNSIGNED_SHORT_5_6_5;
1193 *comps = 3;
1194 return;
1195
1196 case MESA_FORMAT_ARGB4444:
1197 case MESA_FORMAT_ARGB4444_REV:
1198 *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1199 *comps = 4;
1200 return;
1201
1202 case MESA_FORMAT_ARGB1555:
1203 case MESA_FORMAT_ARGB1555_REV:
1204 *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
1205 *comps = 4;
1206 return;
1207
1208 case MESA_FORMAT_AL88:
1209 case MESA_FORMAT_AL88_REV:
1210 case MESA_FORMAT_RG88:
1211 case MESA_FORMAT_RG88_REV:
1212 *datatype = GL_UNSIGNED_BYTE;
1213 *comps = 2;
1214 return;
1215
1216 case MESA_FORMAT_AL1616:
1217 case MESA_FORMAT_AL1616_REV:
1218 case MESA_FORMAT_RG1616:
1219 case MESA_FORMAT_RG1616_REV:
1220 *datatype = GL_UNSIGNED_SHORT;
1221 *comps = 2;
1222 return;
1223
1224 case MESA_FORMAT_R16:
1225 *datatype = GL_UNSIGNED_SHORT;
1226 *comps = 1;
1227 return;
1228
1229 case MESA_FORMAT_RGB332:
1230 *datatype = GL_UNSIGNED_BYTE_3_3_2;
1231 *comps = 3;
1232 return;
1233
1234 case MESA_FORMAT_A8:
1235 case MESA_FORMAT_L8:
1236 case MESA_FORMAT_I8:
1237 case MESA_FORMAT_CI8:
1238 case MESA_FORMAT_R8:
1239 *datatype = GL_UNSIGNED_BYTE;
1240 *comps = 1;
1241 return;
1242
1243 case MESA_FORMAT_YCBCR:
1244 case MESA_FORMAT_YCBCR_REV:
1245 *datatype = GL_UNSIGNED_SHORT;
1246 *comps = 2;
1247 return;
1248
1249 case MESA_FORMAT_Z24_S8:
1250 *datatype = GL_UNSIGNED_INT;
1251 *comps = 1; /* XXX OK? */
1252 return;
1253
1254 case MESA_FORMAT_S8_Z24:
1255 *datatype = GL_UNSIGNED_INT;
1256 *comps = 1; /* XXX OK? */
1257 return;
1258
1259 case MESA_FORMAT_Z16:
1260 *datatype = GL_UNSIGNED_SHORT;
1261 *comps = 1;
1262 return;
1263
1264 case MESA_FORMAT_X8_Z24:
1265 *datatype = GL_UNSIGNED_INT;
1266 *comps = 1;
1267 return;
1268
1269 case MESA_FORMAT_Z24_X8:
1270 *datatype = GL_UNSIGNED_INT;
1271 *comps = 1;
1272 return;
1273
1274 case MESA_FORMAT_Z32:
1275 *datatype = GL_UNSIGNED_INT;
1276 *comps = 1;
1277 return;
1278
1279 case MESA_FORMAT_DUDV8:
1280 *datatype = GL_BYTE;
1281 *comps = 2;
1282 return;
1283
1284 case MESA_FORMAT_SIGNED_RGBA8888:
1285 case MESA_FORMAT_SIGNED_RGBA8888_REV:
1286 *datatype = GL_BYTE;
1287 *comps = 4;
1288 return;
1289
1290 case MESA_FORMAT_SIGNED_R_16:
1291 *datatype = GL_SHORT;
1292 *comps = 1;
1293 return;
1294 case MESA_FORMAT_SIGNED_RG_16:
1295 *datatype = GL_SHORT;
1296 *comps = 2;
1297 return;
1298 case MESA_FORMAT_SIGNED_RGB_16:
1299 *datatype = GL_SHORT;
1300 *comps = 3;
1301 return;
1302 case MESA_FORMAT_SIGNED_RGBA_16:
1303 *datatype = GL_SHORT;
1304 *comps = 4;
1305 return;
1306
1307 #if FEATURE_EXT_texture_sRGB
1308 case MESA_FORMAT_SRGB8:
1309 *datatype = GL_UNSIGNED_BYTE;
1310 *comps = 3;
1311 return;
1312 case MESA_FORMAT_SRGBA8:
1313 case MESA_FORMAT_SARGB8:
1314 *datatype = GL_UNSIGNED_BYTE;
1315 *comps = 4;
1316 return;
1317 case MESA_FORMAT_SL8:
1318 *datatype = GL_UNSIGNED_BYTE;
1319 *comps = 1;
1320 return;
1321 case MESA_FORMAT_SLA8:
1322 *datatype = GL_UNSIGNED_BYTE;
1323 *comps = 2;
1324 return;
1325 #endif
1326
1327 #if FEATURE_texture_fxt1
1328 case MESA_FORMAT_RGB_FXT1:
1329 case MESA_FORMAT_RGBA_FXT1:
1330 #endif
1331 #if FEATURE_texture_s3tc
1332 case MESA_FORMAT_RGB_DXT1:
1333 case MESA_FORMAT_RGBA_DXT1:
1334 case MESA_FORMAT_RGBA_DXT3:
1335 case MESA_FORMAT_RGBA_DXT5:
1336 #if FEATURE_EXT_texture_sRGB
1337 case MESA_FORMAT_SRGB_DXT1:
1338 case MESA_FORMAT_SRGBA_DXT1:
1339 case MESA_FORMAT_SRGBA_DXT3:
1340 case MESA_FORMAT_SRGBA_DXT5:
1341 #endif
1342 #endif
1343 /* XXX generate error instead? */
1344 *datatype = GL_UNSIGNED_BYTE;
1345 *comps = 0;
1346 return;
1347
1348 case MESA_FORMAT_RGBA_FLOAT32:
1349 *datatype = GL_FLOAT;
1350 *comps = 4;
1351 return;
1352 case MESA_FORMAT_RGBA_FLOAT16:
1353 *datatype = GL_HALF_FLOAT_ARB;
1354 *comps = 4;
1355 return;
1356 case MESA_FORMAT_RGB_FLOAT32:
1357 *datatype = GL_FLOAT;
1358 *comps = 3;
1359 return;
1360 case MESA_FORMAT_RGB_FLOAT16:
1361 *datatype = GL_HALF_FLOAT_ARB;
1362 *comps = 3;
1363 return;
1364 case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:
1365 *datatype = GL_FLOAT;
1366 *comps = 2;
1367 return;
1368 case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:
1369 *datatype = GL_HALF_FLOAT_ARB;
1370 *comps = 2;
1371 return;
1372 case MESA_FORMAT_ALPHA_FLOAT32:
1373 case MESA_FORMAT_LUMINANCE_FLOAT32:
1374 case MESA_FORMAT_INTENSITY_FLOAT32:
1375 *datatype = GL_FLOAT;
1376 *comps = 1;
1377 return;
1378 case MESA_FORMAT_ALPHA_FLOAT16:
1379 case MESA_FORMAT_LUMINANCE_FLOAT16:
1380 case MESA_FORMAT_INTENSITY_FLOAT16:
1381 *datatype = GL_HALF_FLOAT_ARB;
1382 *comps = 1;
1383 return;
1384
1385 case MESA_FORMAT_RGBA_INT8:
1386 *datatype = GL_BYTE;
1387 *comps = 4;
1388 return;
1389 case MESA_FORMAT_RGBA_INT16:
1390 *datatype = GL_SHORT;
1391 *comps = 4;
1392 return;
1393 case MESA_FORMAT_RGBA_INT32:
1394 *datatype = GL_INT;
1395 *comps = 4;
1396 return;
1397
1398 /**
1399 * \name Non-normalized unsigned integer formats.
1400 */
1401 case MESA_FORMAT_RGBA_UINT8:
1402 *datatype = GL_UNSIGNED_BYTE;
1403 *comps = 4;
1404 return;
1405 case MESA_FORMAT_RGBA_UINT16:
1406 *datatype = GL_UNSIGNED_SHORT;
1407 *comps = 4;
1408 return;
1409 case MESA_FORMAT_RGBA_UINT32:
1410 *datatype = GL_UNSIGNED_INT;
1411 *comps = 4;
1412 return;
1413
1414
1415 default:
1416 _mesa_problem(NULL, "bad format in _mesa_format_to_type_and_comps");
1417 *datatype = 0;
1418 *comps = 1;
1419 }
1420 }