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Merge remote branch 'origin/master' into pipe-video
[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 return info->StrName;
867 }
868
869
870
871 /**
872 * Return bytes needed to store a block of pixels in the given format.
873 * Normally, a block is 1x1 (a single pixel). But for compressed formats
874 * a block may be 4x4 or 8x4, etc.
875 */
876 GLuint
877 _mesa_get_format_bytes(gl_format format)
878 {
879 const struct gl_format_info *info = _mesa_get_format_info(format);
880 ASSERT(info->BytesPerBlock);
881 return info->BytesPerBlock;
882 }
883
884
885 /**
886 * Return bits per component for the given format.
887 * \param format one of MESA_FORMAT_x
888 * \param pname the component, such as GL_RED_BITS, GL_TEXTURE_BLUE_BITS, etc.
889 */
890 GLint
891 _mesa_get_format_bits(gl_format format, GLenum pname)
892 {
893 const struct gl_format_info *info = _mesa_get_format_info(format);
894
895 switch (pname) {
896 case GL_RED_BITS:
897 case GL_TEXTURE_RED_SIZE:
898 case GL_RENDERBUFFER_RED_SIZE_EXT:
899 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
900 return info->RedBits;
901 case GL_GREEN_BITS:
902 case GL_TEXTURE_GREEN_SIZE:
903 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
904 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
905 return info->GreenBits;
906 case GL_BLUE_BITS:
907 case GL_TEXTURE_BLUE_SIZE:
908 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
909 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
910 return info->BlueBits;
911 case GL_ALPHA_BITS:
912 case GL_TEXTURE_ALPHA_SIZE:
913 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
914 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
915 return info->AlphaBits;
916 case GL_TEXTURE_INTENSITY_SIZE:
917 return info->IntensityBits;
918 case GL_TEXTURE_LUMINANCE_SIZE:
919 return info->LuminanceBits;
920 case GL_INDEX_BITS:
921 case GL_TEXTURE_INDEX_SIZE_EXT:
922 return info->IndexBits;
923 case GL_DEPTH_BITS:
924 case GL_TEXTURE_DEPTH_SIZE_ARB:
925 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
926 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
927 return info->DepthBits;
928 case GL_STENCIL_BITS:
929 case GL_TEXTURE_STENCIL_SIZE_EXT:
930 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
931 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
932 return info->StencilBits;
933 default:
934 _mesa_problem(NULL, "bad pname in _mesa_get_format_bits()");
935 return 0;
936 }
937 }
938
939
940 /**
941 * Return the data type (or more specifically, the data representation)
942 * for the given format.
943 * The return value will be one of:
944 * GL_UNSIGNED_NORMALIZED = unsigned int representing [0,1]
945 * GL_SIGNED_NORMALIZED = signed int representing [-1, 1]
946 * GL_UNSIGNED_INT = an ordinary unsigned integer
947 * GL_INT = an ordinary signed 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 * Is the given format a signed/unsigned integer color format?
1011 */
1012 GLboolean
1013 _mesa_is_format_integer_color(gl_format format)
1014 {
1015 const struct gl_format_info *info = _mesa_get_format_info(format);
1016 return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT) &&
1017 info->BaseFormat != GL_DEPTH_COMPONENT &&
1018 info->BaseFormat != GL_DEPTH_STENCIL &&
1019 info->BaseFormat != GL_STENCIL_INDEX;
1020 }
1021
1022
1023 /**
1024 * Return color encoding for given format.
1025 * \return GL_LINEAR or GL_SRGB
1026 */
1027 GLenum
1028 _mesa_get_format_color_encoding(gl_format format)
1029 {
1030 /* XXX this info should be encoded in gl_format_info */
1031 switch (format) {
1032 case MESA_FORMAT_SRGB8:
1033 case MESA_FORMAT_SRGBA8:
1034 case MESA_FORMAT_SARGB8:
1035 case MESA_FORMAT_SL8:
1036 case MESA_FORMAT_SLA8:
1037 case MESA_FORMAT_SRGB_DXT1:
1038 case MESA_FORMAT_SRGBA_DXT1:
1039 case MESA_FORMAT_SRGBA_DXT3:
1040 case MESA_FORMAT_SRGBA_DXT5:
1041 return GL_SRGB;
1042 default:
1043 return GL_LINEAR;
1044 }
1045 }
1046
1047
1048 /**
1049 * Return number of bytes needed to store an image of the given size
1050 * in the given format.
1051 */
1052 GLuint
1053 _mesa_format_image_size(gl_format format, GLsizei width,
1054 GLsizei height, GLsizei depth)
1055 {
1056 const struct gl_format_info *info = _mesa_get_format_info(format);
1057 /* Strictly speaking, a conditional isn't needed here */
1058 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
1059 /* compressed format (2D only for now) */
1060 const GLuint bw = info->BlockWidth, bh = info->BlockHeight;
1061 const GLuint wblocks = (width + bw - 1) / bw;
1062 const GLuint hblocks = (height + bh - 1) / bh;
1063 const GLuint sz = wblocks * hblocks * info->BytesPerBlock;
1064 assert(depth == 1);
1065 return sz;
1066 }
1067 else {
1068 /* non-compressed */
1069 const GLuint sz = width * height * depth * info->BytesPerBlock;
1070 return sz;
1071 }
1072 }
1073
1074
1075 /**
1076 * Same as _mesa_format_image_size() but returns a 64-bit value to
1077 * accomodate very large textures.
1078 */
1079 uint64_t
1080 _mesa_format_image_size64(gl_format format, GLsizei width,
1081 GLsizei height, GLsizei depth)
1082 {
1083 const struct gl_format_info *info = _mesa_get_format_info(format);
1084 /* Strictly speaking, a conditional isn't needed here */
1085 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
1086 /* compressed format (2D only for now) */
1087 const uint64_t bw = info->BlockWidth, bh = info->BlockHeight;
1088 const uint64_t wblocks = (width + bw - 1) / bw;
1089 const uint64_t hblocks = (height + bh - 1) / bh;
1090 const uint64_t sz = wblocks * hblocks * info->BytesPerBlock;
1091 assert(depth == 1);
1092 return sz;
1093 }
1094 else {
1095 /* non-compressed */
1096 const uint64_t sz = ((uint64_t) width *
1097 (uint64_t) height *
1098 (uint64_t) depth *
1099 info->BytesPerBlock);
1100 return sz;
1101 }
1102 }
1103
1104
1105
1106 GLint
1107 _mesa_format_row_stride(gl_format format, GLsizei width)
1108 {
1109 const struct gl_format_info *info = _mesa_get_format_info(format);
1110 /* Strictly speaking, a conditional isn't needed here */
1111 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
1112 /* compressed format */
1113 const GLuint bw = info->BlockWidth;
1114 const GLuint wblocks = (width + bw - 1) / bw;
1115 const GLint stride = wblocks * info->BytesPerBlock;
1116 return stride;
1117 }
1118 else {
1119 const GLint stride = width * info->BytesPerBlock;
1120 return stride;
1121 }
1122 }
1123
1124
1125
1126 /**
1127 * Do sanity checking of the format info table.
1128 */
1129 void
1130 _mesa_test_formats(void)
1131 {
1132 GLuint i;
1133
1134 assert(Elements(format_info) == MESA_FORMAT_COUNT);
1135
1136 for (i = 0; i < MESA_FORMAT_COUNT; i++) {
1137 const struct gl_format_info *info = _mesa_get_format_info(i);
1138 assert(info);
1139
1140 assert(info->Name == i);
1141
1142 if (info->Name == MESA_FORMAT_NONE)
1143 continue;
1144
1145 if (info->BlockWidth == 1 && info->BlockHeight == 1) {
1146 if (info->RedBits > 0) {
1147 GLuint t = info->RedBits + info->GreenBits
1148 + info->BlueBits + info->AlphaBits;
1149 assert(t / 8 == info->BytesPerBlock);
1150 (void) t;
1151 }
1152 }
1153
1154 assert(info->DataType == GL_UNSIGNED_NORMALIZED ||
1155 info->DataType == GL_SIGNED_NORMALIZED ||
1156 info->DataType == GL_UNSIGNED_INT ||
1157 info->DataType == GL_FLOAT);
1158
1159 if (info->BaseFormat == GL_RGB) {
1160 assert(info->RedBits > 0);
1161 assert(info->GreenBits > 0);
1162 assert(info->BlueBits > 0);
1163 assert(info->AlphaBits == 0);
1164 assert(info->LuminanceBits == 0);
1165 assert(info->IntensityBits == 0);
1166 }
1167 else if (info->BaseFormat == GL_RGBA) {
1168 assert(info->RedBits > 0);
1169 assert(info->GreenBits > 0);
1170 assert(info->BlueBits > 0);
1171 assert(info->AlphaBits > 0);
1172 assert(info->LuminanceBits == 0);
1173 assert(info->IntensityBits == 0);
1174 }
1175 else if (info->BaseFormat == GL_RG) {
1176 assert(info->RedBits > 0);
1177 assert(info->GreenBits > 0);
1178 assert(info->BlueBits == 0);
1179 assert(info->AlphaBits == 0);
1180 assert(info->LuminanceBits == 0);
1181 assert(info->IntensityBits == 0);
1182 }
1183 else if (info->BaseFormat == GL_RED) {
1184 assert(info->RedBits > 0);
1185 assert(info->GreenBits == 0);
1186 assert(info->BlueBits == 0);
1187 assert(info->AlphaBits == 0);
1188 assert(info->LuminanceBits == 0);
1189 assert(info->IntensityBits == 0);
1190 }
1191 else if (info->BaseFormat == GL_LUMINANCE) {
1192 assert(info->RedBits == 0);
1193 assert(info->GreenBits == 0);
1194 assert(info->BlueBits == 0);
1195 assert(info->AlphaBits == 0);
1196 assert(info->LuminanceBits > 0);
1197 assert(info->IntensityBits == 0);
1198 }
1199 else if (info->BaseFormat == GL_INTENSITY) {
1200 assert(info->RedBits == 0);
1201 assert(info->GreenBits == 0);
1202 assert(info->BlueBits == 0);
1203 assert(info->AlphaBits == 0);
1204 assert(info->LuminanceBits == 0);
1205 assert(info->IntensityBits > 0);
1206 }
1207
1208 }
1209 }
1210
1211
1212
1213 /**
1214 * Return datatype and number of components per texel for the given gl_format.
1215 * Only used for mipmap generation code.
1216 */
1217 void
1218 _mesa_format_to_type_and_comps(gl_format format,
1219 GLenum *datatype, GLuint *comps)
1220 {
1221 switch (format) {
1222 case MESA_FORMAT_RGBA8888:
1223 case MESA_FORMAT_RGBA8888_REV:
1224 case MESA_FORMAT_ARGB8888:
1225 case MESA_FORMAT_ARGB8888_REV:
1226 case MESA_FORMAT_XRGB8888:
1227 case MESA_FORMAT_XRGB8888_REV:
1228 *datatype = GL_UNSIGNED_BYTE;
1229 *comps = 4;
1230 return;
1231 case MESA_FORMAT_RGB888:
1232 case MESA_FORMAT_BGR888:
1233 *datatype = GL_UNSIGNED_BYTE;
1234 *comps = 3;
1235 return;
1236 case MESA_FORMAT_RGB565:
1237 case MESA_FORMAT_RGB565_REV:
1238 *datatype = GL_UNSIGNED_SHORT_5_6_5;
1239 *comps = 3;
1240 return;
1241
1242 case MESA_FORMAT_ARGB4444:
1243 case MESA_FORMAT_ARGB4444_REV:
1244 *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1245 *comps = 4;
1246 return;
1247
1248 case MESA_FORMAT_ARGB1555:
1249 case MESA_FORMAT_ARGB1555_REV:
1250 *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
1251 *comps = 4;
1252 return;
1253
1254 case MESA_FORMAT_RGBA5551:
1255 *datatype = GL_UNSIGNED_SHORT_5_5_5_1;
1256 *comps = 4;
1257 return;
1258
1259 case MESA_FORMAT_AL88:
1260 case MESA_FORMAT_AL88_REV:
1261 case MESA_FORMAT_RG88:
1262 case MESA_FORMAT_RG88_REV:
1263 *datatype = GL_UNSIGNED_BYTE;
1264 *comps = 2;
1265 return;
1266
1267 case MESA_FORMAT_AL1616:
1268 case MESA_FORMAT_AL1616_REV:
1269 case MESA_FORMAT_RG1616:
1270 case MESA_FORMAT_RG1616_REV:
1271 *datatype = GL_UNSIGNED_SHORT;
1272 *comps = 2;
1273 return;
1274
1275 case MESA_FORMAT_R16:
1276 *datatype = GL_UNSIGNED_SHORT;
1277 *comps = 1;
1278 return;
1279
1280 case MESA_FORMAT_RGB332:
1281 *datatype = GL_UNSIGNED_BYTE_3_3_2;
1282 *comps = 3;
1283 return;
1284
1285 case MESA_FORMAT_A8:
1286 case MESA_FORMAT_L8:
1287 case MESA_FORMAT_I8:
1288 case MESA_FORMAT_CI8:
1289 case MESA_FORMAT_R8:
1290 case MESA_FORMAT_S8:
1291 *datatype = GL_UNSIGNED_BYTE;
1292 *comps = 1;
1293 return;
1294
1295 case MESA_FORMAT_YCBCR:
1296 case MESA_FORMAT_YCBCR_REV:
1297 *datatype = GL_UNSIGNED_SHORT;
1298 *comps = 2;
1299 return;
1300
1301 case MESA_FORMAT_Z24_S8:
1302 *datatype = GL_UNSIGNED_INT;
1303 *comps = 1; /* XXX OK? */
1304 return;
1305
1306 case MESA_FORMAT_S8_Z24:
1307 *datatype = GL_UNSIGNED_INT;
1308 *comps = 1; /* XXX OK? */
1309 return;
1310
1311 case MESA_FORMAT_Z16:
1312 *datatype = GL_UNSIGNED_SHORT;
1313 *comps = 1;
1314 return;
1315
1316 case MESA_FORMAT_X8_Z24:
1317 *datatype = GL_UNSIGNED_INT;
1318 *comps = 1;
1319 return;
1320
1321 case MESA_FORMAT_Z24_X8:
1322 *datatype = GL_UNSIGNED_INT;
1323 *comps = 1;
1324 return;
1325
1326 case MESA_FORMAT_Z32:
1327 *datatype = GL_UNSIGNED_INT;
1328 *comps = 1;
1329 return;
1330
1331 case MESA_FORMAT_DUDV8:
1332 *datatype = GL_BYTE;
1333 *comps = 2;
1334 return;
1335
1336 case MESA_FORMAT_SIGNED_R8:
1337 *datatype = GL_BYTE;
1338 *comps = 1;
1339 return;
1340 case MESA_FORMAT_SIGNED_RG88:
1341 *datatype = GL_BYTE;
1342 *comps = 2;
1343 return;
1344 case MESA_FORMAT_SIGNED_RGBA8888:
1345 case MESA_FORMAT_SIGNED_RGBA8888_REV:
1346 case MESA_FORMAT_SIGNED_RGBX8888:
1347 *datatype = GL_BYTE;
1348 *comps = 4;
1349 return;
1350
1351 case MESA_FORMAT_RGBA_16:
1352 *datatype = GL_UNSIGNED_SHORT;
1353 *comps = 4;
1354 return;
1355
1356 case MESA_FORMAT_SIGNED_R_16:
1357 *datatype = GL_SHORT;
1358 *comps = 1;
1359 return;
1360 case MESA_FORMAT_SIGNED_RG_16:
1361 *datatype = GL_SHORT;
1362 *comps = 2;
1363 return;
1364 case MESA_FORMAT_SIGNED_RGB_16:
1365 *datatype = GL_SHORT;
1366 *comps = 3;
1367 return;
1368 case MESA_FORMAT_SIGNED_RGBA_16:
1369 *datatype = GL_SHORT;
1370 *comps = 4;
1371 return;
1372
1373 #if FEATURE_EXT_texture_sRGB
1374 case MESA_FORMAT_SRGB8:
1375 *datatype = GL_UNSIGNED_BYTE;
1376 *comps = 3;
1377 return;
1378 case MESA_FORMAT_SRGBA8:
1379 case MESA_FORMAT_SARGB8:
1380 *datatype = GL_UNSIGNED_BYTE;
1381 *comps = 4;
1382 return;
1383 case MESA_FORMAT_SL8:
1384 *datatype = GL_UNSIGNED_BYTE;
1385 *comps = 1;
1386 return;
1387 case MESA_FORMAT_SLA8:
1388 *datatype = GL_UNSIGNED_BYTE;
1389 *comps = 2;
1390 return;
1391 #endif
1392
1393 #if FEATURE_texture_fxt1
1394 case MESA_FORMAT_RGB_FXT1:
1395 case MESA_FORMAT_RGBA_FXT1:
1396 #endif
1397 #if FEATURE_texture_s3tc
1398 case MESA_FORMAT_RGB_DXT1:
1399 case MESA_FORMAT_RGBA_DXT1:
1400 case MESA_FORMAT_RGBA_DXT3:
1401 case MESA_FORMAT_RGBA_DXT5:
1402 #if FEATURE_EXT_texture_sRGB
1403 case MESA_FORMAT_SRGB_DXT1:
1404 case MESA_FORMAT_SRGBA_DXT1:
1405 case MESA_FORMAT_SRGBA_DXT3:
1406 case MESA_FORMAT_SRGBA_DXT5:
1407 #endif
1408 #endif
1409 /* XXX generate error instead? */
1410 *datatype = GL_UNSIGNED_BYTE;
1411 *comps = 0;
1412 return;
1413
1414 case MESA_FORMAT_RGBA_FLOAT32:
1415 *datatype = GL_FLOAT;
1416 *comps = 4;
1417 return;
1418 case MESA_FORMAT_RGBA_FLOAT16:
1419 *datatype = GL_HALF_FLOAT_ARB;
1420 *comps = 4;
1421 return;
1422 case MESA_FORMAT_RGB_FLOAT32:
1423 *datatype = GL_FLOAT;
1424 *comps = 3;
1425 return;
1426 case MESA_FORMAT_RGB_FLOAT16:
1427 *datatype = GL_HALF_FLOAT_ARB;
1428 *comps = 3;
1429 return;
1430 case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:
1431 *datatype = GL_FLOAT;
1432 *comps = 2;
1433 return;
1434 case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:
1435 *datatype = GL_HALF_FLOAT_ARB;
1436 *comps = 2;
1437 return;
1438 case MESA_FORMAT_ALPHA_FLOAT32:
1439 case MESA_FORMAT_LUMINANCE_FLOAT32:
1440 case MESA_FORMAT_INTENSITY_FLOAT32:
1441 *datatype = GL_FLOAT;
1442 *comps = 1;
1443 return;
1444 case MESA_FORMAT_ALPHA_FLOAT16:
1445 case MESA_FORMAT_LUMINANCE_FLOAT16:
1446 case MESA_FORMAT_INTENSITY_FLOAT16:
1447 *datatype = GL_HALF_FLOAT_ARB;
1448 *comps = 1;
1449 return;
1450
1451 case MESA_FORMAT_RGBA_INT8:
1452 *datatype = GL_BYTE;
1453 *comps = 4;
1454 return;
1455 case MESA_FORMAT_RGBA_INT16:
1456 *datatype = GL_SHORT;
1457 *comps = 4;
1458 return;
1459 case MESA_FORMAT_RGBA_INT32:
1460 *datatype = GL_INT;
1461 *comps = 4;
1462 return;
1463
1464 /**
1465 * \name Non-normalized unsigned integer formats.
1466 */
1467 case MESA_FORMAT_RGBA_UINT8:
1468 *datatype = GL_UNSIGNED_BYTE;
1469 *comps = 4;
1470 return;
1471 case MESA_FORMAT_RGBA_UINT16:
1472 *datatype = GL_UNSIGNED_SHORT;
1473 *comps = 4;
1474 return;
1475 case MESA_FORMAT_RGBA_UINT32:
1476 *datatype = GL_UNSIGNED_INT;
1477 *comps = 4;
1478 return;
1479
1480 case MESA_FORMAT_NONE:
1481 case MESA_FORMAT_COUNT:
1482 /* For debug builds, warn if any formats are not handled */
1483 #ifndef DEBUG
1484 default:
1485 #endif
1486 _mesa_problem(NULL, "bad format %s in _mesa_format_to_type_and_comps",
1487 _mesa_get_format_name(format));
1488 *datatype = 0;
1489 *comps = 1;
1490 }
1491 }