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Merge branch 'glsl2-head' into glsl2
[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 "config.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_SIGNED_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_Z24_S8, /* Name */
325 "MESA_FORMAT_Z24_S8", /* StrName */
326 GL_DEPTH_STENCIL, /* BaseFormat */
327 GL_UNSIGNED_INT, /* DataType */
328 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
329 0, 0, 0, 24, 8, /* Lum/Int/Index/Depth/StencilBits */
330 1, 1, 4 /* BlockWidth/Height,Bytes */
331 },
332 {
333 MESA_FORMAT_S8_Z24, /* Name */
334 "MESA_FORMAT_S8_Z24", /* StrName */
335 GL_DEPTH_STENCIL, /* BaseFormat */
336 GL_UNSIGNED_INT, /* DataType */
337 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
338 0, 0, 0, 24, 8, /* Lum/Int/Index/Depth/StencilBits */
339 1, 1, 4 /* BlockWidth/Height,Bytes */
340 },
341 {
342 MESA_FORMAT_Z16, /* Name */
343 "MESA_FORMAT_Z16", /* StrName */
344 GL_DEPTH_COMPONENT, /* BaseFormat */
345 GL_UNSIGNED_INT, /* DataType */
346 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
347 0, 0, 0, 16, 0, /* Lum/Int/Index/Depth/StencilBits */
348 1, 1, 2 /* BlockWidth/Height,Bytes */
349 },
350 {
351 MESA_FORMAT_X8_Z24, /* Name */
352 "MESA_FORMAT_X8_Z24", /* StrName */
353 GL_DEPTH_COMPONENT, /* BaseFormat */
354 GL_UNSIGNED_INT, /* DataType */
355 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
356 0, 0, 0, 24, 0, /* Lum/Int/Index/Depth/StencilBits */
357 1, 1, 4 /* BlockWidth/Height,Bytes */
358 },
359 {
360 MESA_FORMAT_Z24_X8, /* Name */
361 "MESA_FORMAT_Z24_X8", /* StrName */
362 GL_DEPTH_COMPONENT, /* BaseFormat */
363 GL_UNSIGNED_INT, /* DataType */
364 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
365 0, 0, 0, 24, 0, /* Lum/Int/Index/Depth/StencilBits */
366 1, 1, 4 /* BlockWidth/Height,Bytes */
367 },
368 {
369 MESA_FORMAT_Z32, /* Name */
370 "MESA_FORMAT_Z32", /* StrName */
371 GL_DEPTH_COMPONENT, /* BaseFormat */
372 GL_UNSIGNED_INT, /* DataType */
373 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
374 0, 0, 0, 32, 0, /* Lum/Int/Index/Depth/StencilBits */
375 1, 1, 4 /* BlockWidth/Height,Bytes */
376 },
377 {
378 MESA_FORMAT_S8, /* Name */
379 "MESA_FORMAT_S8", /* StrName */
380 GL_STENCIL_INDEX, /* BaseFormat */
381 GL_UNSIGNED_INT, /* DataType */
382 0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
383 0, 0, 0, 0, 8, /* Lum/Int/Index/Depth/StencilBits */
384 1, 1, 1 /* BlockWidth/Height,Bytes */
385 },
386 {
387 MESA_FORMAT_SRGB8,
388 "MESA_FORMAT_SRGB8",
389 GL_RGB,
390 GL_UNSIGNED_NORMALIZED,
391 8, 8, 8, 0,
392 0, 0, 0, 0, 0,
393 1, 1, 3
394 },
395 {
396 MESA_FORMAT_SRGBA8,
397 "MESA_FORMAT_SRGBA8",
398 GL_RGBA,
399 GL_UNSIGNED_NORMALIZED,
400 8, 8, 8, 8,
401 0, 0, 0, 0, 0,
402 1, 1, 4
403 },
404 {
405 MESA_FORMAT_SARGB8,
406 "MESA_FORMAT_SARGB8",
407 GL_RGBA,
408 GL_UNSIGNED_NORMALIZED,
409 8, 8, 8, 8,
410 0, 0, 0, 0, 0,
411 1, 1, 4
412 },
413 {
414 MESA_FORMAT_SL8,
415 "MESA_FORMAT_SL8",
416 GL_LUMINANCE,
417 GL_UNSIGNED_NORMALIZED,
418 0, 0, 0, 0,
419 8, 0, 0, 0, 0,
420 1, 1, 1
421 },
422 {
423 MESA_FORMAT_SLA8,
424 "MESA_FORMAT_SLA8",
425 GL_LUMINANCE_ALPHA,
426 GL_UNSIGNED_NORMALIZED,
427 0, 0, 0, 8,
428 8, 0, 0, 0, 0,
429 1, 1, 2
430 },
431 {
432 MESA_FORMAT_SRGB_DXT1, /* Name */
433 "MESA_FORMAT_SRGB_DXT1", /* StrName */
434 GL_RGB, /* BaseFormat */
435 GL_UNSIGNED_NORMALIZED, /* DataType */
436 4, 4, 4, 0, /* approx Red/Green/Blue/AlphaBits */
437 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
438 4, 4, 8 /* 8 bytes per 4x4 block */
439 },
440 {
441 MESA_FORMAT_SRGBA_DXT1,
442 "MESA_FORMAT_SRGBA_DXT1",
443 GL_RGBA,
444 GL_UNSIGNED_NORMALIZED,
445 4, 4, 4, 4,
446 0, 0, 0, 0, 0,
447 4, 4, 8 /* 8 bytes per 4x4 block */
448 },
449 {
450 MESA_FORMAT_SRGBA_DXT3,
451 "MESA_FORMAT_SRGBA_DXT3",
452 GL_RGBA,
453 GL_UNSIGNED_NORMALIZED,
454 4, 4, 4, 4,
455 0, 0, 0, 0, 0,
456 4, 4, 16 /* 16 bytes per 4x4 block */
457 },
458 {
459 MESA_FORMAT_SRGBA_DXT5,
460 "MESA_FORMAT_SRGBA_DXT5",
461 GL_RGBA,
462 GL_UNSIGNED_NORMALIZED,
463 4, 4, 4, 4,
464 0, 0, 0, 0, 0,
465 4, 4, 16 /* 16 bytes per 4x4 block */
466 },
467
468 {
469 MESA_FORMAT_RGB_FXT1,
470 "MESA_FORMAT_RGB_FXT1",
471 GL_RGB,
472 GL_UNSIGNED_NORMALIZED,
473 4, 4, 4, 0, /* approx Red/Green/BlueBits */
474 0, 0, 0, 0, 0,
475 8, 4, 16 /* 16 bytes per 8x4 block */
476 },
477 {
478 MESA_FORMAT_RGBA_FXT1,
479 "MESA_FORMAT_RGBA_FXT1",
480 GL_RGBA,
481 GL_UNSIGNED_NORMALIZED,
482 4, 4, 4, 1, /* approx Red/Green/Blue/AlphaBits */
483 0, 0, 0, 0, 0,
484 8, 4, 16 /* 16 bytes per 8x4 block */
485 },
486
487 {
488 MESA_FORMAT_RGB_DXT1, /* Name */
489 "MESA_FORMAT_RGB_DXT1", /* StrName */
490 GL_RGB, /* BaseFormat */
491 GL_UNSIGNED_NORMALIZED, /* DataType */
492 4, 4, 4, 0, /* approx Red/Green/Blue/AlphaBits */
493 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
494 4, 4, 8 /* 8 bytes per 4x4 block */
495 },
496 {
497 MESA_FORMAT_RGBA_DXT1,
498 "MESA_FORMAT_RGBA_DXT1",
499 GL_RGBA,
500 GL_UNSIGNED_NORMALIZED,
501 4, 4, 4, 4,
502 0, 0, 0, 0, 0,
503 4, 4, 8 /* 8 bytes per 4x4 block */
504 },
505 {
506 MESA_FORMAT_RGBA_DXT3,
507 "MESA_FORMAT_RGBA_DXT3",
508 GL_RGBA,
509 GL_UNSIGNED_NORMALIZED,
510 4, 4, 4, 4,
511 0, 0, 0, 0, 0,
512 4, 4, 16 /* 16 bytes per 4x4 block */
513 },
514 {
515 MESA_FORMAT_RGBA_DXT5,
516 "MESA_FORMAT_RGBA_DXT5",
517 GL_RGBA,
518 GL_UNSIGNED_NORMALIZED,
519 4, 4, 4, 4,
520 0, 0, 0, 0, 0,
521 4, 4, 16 /* 16 bytes per 4x4 block */
522 },
523 {
524 MESA_FORMAT_RGBA_FLOAT32,
525 "MESA_FORMAT_RGBA_FLOAT32",
526 GL_RGBA,
527 GL_FLOAT,
528 32, 32, 32, 32,
529 0, 0, 0, 0, 0,
530 1, 1, 16
531 },
532 {
533 MESA_FORMAT_RGBA_FLOAT16,
534 "MESA_FORMAT_RGBA_FLOAT16",
535 GL_RGBA,
536 GL_FLOAT,
537 16, 16, 16, 16,
538 0, 0, 0, 0, 0,
539 1, 1, 8
540 },
541 {
542 MESA_FORMAT_RGB_FLOAT32,
543 "MESA_FORMAT_RGB_FLOAT32",
544 GL_RGB,
545 GL_FLOAT,
546 32, 32, 32, 0,
547 0, 0, 0, 0, 0,
548 1, 1, 12
549 },
550 {
551 MESA_FORMAT_RGB_FLOAT16,
552 "MESA_FORMAT_RGB_FLOAT16",
553 GL_RGB,
554 GL_FLOAT,
555 16, 16, 16, 0,
556 0, 0, 0, 0, 0,
557 1, 1, 6
558 },
559 {
560 MESA_FORMAT_ALPHA_FLOAT32,
561 "MESA_FORMAT_ALPHA_FLOAT32",
562 GL_ALPHA,
563 GL_FLOAT,
564 0, 0, 0, 32,
565 0, 0, 0, 0, 0,
566 1, 1, 4
567 },
568 {
569 MESA_FORMAT_ALPHA_FLOAT16,
570 "MESA_FORMAT_ALPHA_FLOAT16",
571 GL_ALPHA,
572 GL_FLOAT,
573 0, 0, 0, 16,
574 0, 0, 0, 0, 0,
575 1, 1, 2
576 },
577 {
578 MESA_FORMAT_LUMINANCE_FLOAT32,
579 "MESA_FORMAT_LUMINANCE_FLOAT32",
580 GL_ALPHA,
581 GL_FLOAT,
582 0, 0, 0, 0,
583 32, 0, 0, 0, 0,
584 1, 1, 4
585 },
586 {
587 MESA_FORMAT_LUMINANCE_FLOAT16,
588 "MESA_FORMAT_LUMINANCE_FLOAT16",
589 GL_ALPHA,
590 GL_FLOAT,
591 0, 0, 0, 0,
592 16, 0, 0, 0, 0,
593 1, 1, 2
594 },
595 {
596 MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
597 "MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32",
598 GL_LUMINANCE_ALPHA,
599 GL_FLOAT,
600 0, 0, 0, 32,
601 32, 0, 0, 0, 0,
602 1, 1, 8
603 },
604 {
605 MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
606 "MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16",
607 GL_LUMINANCE_ALPHA,
608 GL_FLOAT,
609 0, 0, 0, 16,
610 16, 0, 0, 0, 0,
611 1, 1, 4
612 },
613 {
614 MESA_FORMAT_INTENSITY_FLOAT32,
615 "MESA_FORMAT_INTENSITY_FLOAT32",
616 GL_INTENSITY,
617 GL_FLOAT,
618 0, 0, 0, 0,
619 0, 32, 0, 0, 0,
620 1, 1, 4
621 },
622 {
623 MESA_FORMAT_INTENSITY_FLOAT16,
624 "MESA_FORMAT_INTENSITY_FLOAT16",
625 GL_INTENSITY,
626 GL_FLOAT,
627 0, 0, 0, 0,
628 0, 16, 0, 0, 0,
629 1, 1, 2
630 },
631 {
632 MESA_FORMAT_DUDV8,
633 "MESA_FORMAT_DUDV8",
634 GL_DUDV_ATI,
635 GL_SIGNED_NORMALIZED,
636 0, 0, 0, 0,
637 0, 0, 0, 0, 0,
638 1, 1, 2
639 },
640
641 /* Signed 8 bits / channel */
642 {
643 MESA_FORMAT_SIGNED_R8, /* Name */
644 "MESA_FORMAT_SIGNED_R8", /* StrName */
645 GL_RGBA, /* BaseFormat */
646 GL_SIGNED_NORMALIZED, /* DataType */
647 8, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
648 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
649 1, 1, 1 /* BlockWidth/Height,Bytes */
650 },
651 {
652 MESA_FORMAT_SIGNED_RG88,
653 "MESA_FORMAT_SIGNED_RG88",
654 GL_RGBA,
655 GL_SIGNED_NORMALIZED,
656 8, 8, 0, 0,
657 0, 0, 0, 0, 0,
658 1, 1, 2
659 },
660 {
661 MESA_FORMAT_SIGNED_RGBX8888,
662 "MESA_FORMAT_SIGNED_RGBX8888",
663 GL_RGBA,
664 GL_SIGNED_NORMALIZED,
665 8, 8, 8, 0,
666 0, 0, 0, 0, 0,
667 1, 1, 4 /* 4 bpp, but no alpha */
668 },
669 {
670 MESA_FORMAT_SIGNED_RGBA8888,
671 "MESA_FORMAT_SIGNED_RGBA8888",
672 GL_RGBA,
673 GL_SIGNED_NORMALIZED,
674 8, 8, 8, 8,
675 0, 0, 0, 0, 0,
676 1, 1, 4
677 },
678 {
679 MESA_FORMAT_SIGNED_RGBA8888_REV,
680 "MESA_FORMAT_SIGNED_RGBA8888_REV",
681 GL_RGBA,
682 GL_SIGNED_NORMALIZED,
683 8, 8, 8, 8,
684 0, 0, 0, 0, 0,
685 1, 1, 4
686 },
687
688 /* Signed 16 bits / channel */
689 {
690 MESA_FORMAT_SIGNED_R_16,
691 "MESA_FORMAT_SIGNED_R_16",
692 GL_RGBA,
693 GL_SIGNED_NORMALIZED,
694 16, 0, 0, 0,
695 0, 0, 0, 0, 0,
696 1, 1, 2
697 },
698 {
699 MESA_FORMAT_SIGNED_RG_16,
700 "MESA_FORMAT_SIGNED_RG_16",
701 GL_RGBA,
702 GL_SIGNED_NORMALIZED,
703 16, 16, 0, 0,
704 0, 0, 0, 0, 0,
705 1, 1, 4
706 },
707 {
708 MESA_FORMAT_SIGNED_RGB_16,
709 "MESA_FORMAT_SIGNED_RGB_16",
710 GL_RGBA,
711 GL_SIGNED_NORMALIZED,
712 16, 16, 16, 0,
713 0, 0, 0, 0, 0,
714 1, 1, 6
715 },
716 {
717 MESA_FORMAT_SIGNED_RGBA_16,
718 "MESA_FORMAT_SIGNED_RGBA_16",
719 GL_RGBA,
720 GL_SIGNED_NORMALIZED,
721 16, 16, 16, 16,
722 0, 0, 0, 0, 0,
723 1, 1, 8
724 },
725 {
726 MESA_FORMAT_RGBA_16,
727 "MESA_FORMAT_RGBA_16",
728 GL_RGBA,
729 GL_UNSIGNED_NORMALIZED,
730 16, 16, 16, 16,
731 0, 0, 0, 0, 0,
732 1, 1, 8
733 }
734 };
735
736
737
738 static const struct gl_format_info *
739 _mesa_get_format_info(gl_format format)
740 {
741 const struct gl_format_info *info = &format_info[format];
742 assert(info->Name == format);
743 return info;
744 }
745
746
747 /** Return string name of format (for debugging) */
748 const char *
749 _mesa_get_format_name(gl_format format)
750 {
751 const struct gl_format_info *info = _mesa_get_format_info(format);
752 ASSERT(info->BytesPerBlock);
753 return info->StrName;
754 }
755
756
757
758 /**
759 * Return bytes needed to store a block of pixels in the given format.
760 * Normally, a block is 1x1 (a single pixel). But for compressed formats
761 * a block may be 4x4 or 8x4, etc.
762 */
763 GLuint
764 _mesa_get_format_bytes(gl_format format)
765 {
766 const struct gl_format_info *info = _mesa_get_format_info(format);
767 ASSERT(info->BytesPerBlock);
768 return info->BytesPerBlock;
769 }
770
771
772 /**
773 * Return bits per component for the given format.
774 * \param format one of MESA_FORMAT_x
775 * \param pname the component, such as GL_RED_BITS, GL_TEXTURE_BLUE_BITS, etc.
776 */
777 GLint
778 _mesa_get_format_bits(gl_format format, GLenum pname)
779 {
780 const struct gl_format_info *info = _mesa_get_format_info(format);
781
782 switch (pname) {
783 case GL_RED_BITS:
784 case GL_TEXTURE_RED_SIZE:
785 case GL_RENDERBUFFER_RED_SIZE_EXT:
786 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
787 return info->RedBits;
788 case GL_GREEN_BITS:
789 case GL_TEXTURE_GREEN_SIZE:
790 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
791 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
792 return info->GreenBits;
793 case GL_BLUE_BITS:
794 case GL_TEXTURE_BLUE_SIZE:
795 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
796 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
797 return info->BlueBits;
798 case GL_ALPHA_BITS:
799 case GL_TEXTURE_ALPHA_SIZE:
800 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
801 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
802 return info->AlphaBits;
803 case GL_TEXTURE_INTENSITY_SIZE:
804 return info->IntensityBits;
805 case GL_TEXTURE_LUMINANCE_SIZE:
806 return info->LuminanceBits;
807 case GL_INDEX_BITS:
808 case GL_TEXTURE_INDEX_SIZE_EXT:
809 return info->IndexBits;
810 case GL_DEPTH_BITS:
811 case GL_TEXTURE_DEPTH_SIZE_ARB:
812 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
813 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
814 return info->DepthBits;
815 case GL_STENCIL_BITS:
816 case GL_TEXTURE_STENCIL_SIZE_EXT:
817 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
818 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
819 return info->StencilBits;
820 default:
821 _mesa_problem(NULL, "bad pname in _mesa_get_format_bits()");
822 return 0;
823 }
824 }
825
826
827 /**
828 * Return the data type (or more specifically, the data representation)
829 * for the given format.
830 * The return value will be one of:
831 * GL_UNSIGNED_NORMALIZED = unsigned int representing [0,1]
832 * GL_SIGNED_NORMALIZED = signed int representing [-1, 1]
833 * GL_UNSIGNED_INT = an ordinary unsigned integer
834 * GL_FLOAT = an ordinary float
835 */
836 GLenum
837 _mesa_get_format_datatype(gl_format format)
838 {
839 const struct gl_format_info *info = _mesa_get_format_info(format);
840 return info->DataType;
841 }
842
843
844 /**
845 * Return the basic format for the given type. The result will be
846 * one of GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA,
847 * GL_INTENSITY, GL_YCBCR_MESA, GL_COLOR_INDEX, GL_DEPTH_COMPONENT,
848 * GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
849 */
850 GLenum
851 _mesa_get_format_base_format(gl_format format)
852 {
853 const struct gl_format_info *info = _mesa_get_format_info(format);
854 return info->BaseFormat;
855 }
856
857
858 /**
859 * Return the block size (in pixels) for the given format. Normally
860 * the block size is 1x1. But compressed formats will have block sizes
861 * of 4x4 or 8x4 pixels, etc.
862 * \param bw returns block width in pixels
863 * \param bh returns block height in pixels
864 */
865 void
866 _mesa_get_format_block_size(gl_format format, GLuint *bw, GLuint *bh)
867 {
868 const struct gl_format_info *info = _mesa_get_format_info(format);
869 *bw = info->BlockWidth;
870 *bh = info->BlockHeight;
871 }
872
873
874 /** Is the given format a compressed format? */
875 GLboolean
876 _mesa_is_format_compressed(gl_format format)
877 {
878 const struct gl_format_info *info = _mesa_get_format_info(format);
879 return info->BlockWidth > 1 || info->BlockHeight > 1;
880 }
881
882
883 /**
884 * Return color encoding for given format.
885 * \return GL_LINEAR or GL_SRGB
886 */
887 GLenum
888 _mesa_get_format_color_encoding(gl_format format)
889 {
890 /* XXX this info should be encoded in gl_format_info */
891 switch (format) {
892 case MESA_FORMAT_SRGB8:
893 case MESA_FORMAT_SRGBA8:
894 case MESA_FORMAT_SARGB8:
895 case MESA_FORMAT_SL8:
896 case MESA_FORMAT_SLA8:
897 case MESA_FORMAT_SRGB_DXT1:
898 case MESA_FORMAT_SRGBA_DXT1:
899 case MESA_FORMAT_SRGBA_DXT3:
900 case MESA_FORMAT_SRGBA_DXT5:
901 return GL_SRGB;
902 default:
903 return GL_LINEAR;
904 }
905 }
906
907
908 /**
909 * Return number of bytes needed to store an image of the given size
910 * in the given format.
911 */
912 GLuint
913 _mesa_format_image_size(gl_format format, GLsizei width,
914 GLsizei height, GLsizei depth)
915 {
916 const struct gl_format_info *info = _mesa_get_format_info(format);
917 /* Strictly speaking, a conditional isn't needed here */
918 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
919 /* compressed format */
920 const GLuint bw = info->BlockWidth, bh = info->BlockHeight;
921 const GLuint wblocks = (width + bw - 1) / bw;
922 const GLuint hblocks = (height + bh - 1) / bh;
923 const GLuint sz = wblocks * hblocks * info->BytesPerBlock;
924 return sz;
925 }
926 else {
927 /* non-compressed */
928 const GLuint sz = width * height * depth * info->BytesPerBlock;
929 return sz;
930 }
931 }
932
933
934
935 GLint
936 _mesa_format_row_stride(gl_format format, GLsizei width)
937 {
938 const struct gl_format_info *info = _mesa_get_format_info(format);
939 /* Strictly speaking, a conditional isn't needed here */
940 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
941 /* compressed format */
942 const GLuint bw = info->BlockWidth;
943 const GLuint wblocks = (width + bw - 1) / bw;
944 const GLint stride = wblocks * info->BytesPerBlock;
945 return stride;
946 }
947 else {
948 const GLint stride = width * info->BytesPerBlock;
949 return stride;
950 }
951 }
952
953
954
955 /**
956 * Do sanity checking of the format info table.
957 */
958 void
959 _mesa_test_formats(void)
960 {
961 GLuint i;
962
963 assert(Elements(format_info) == MESA_FORMAT_COUNT);
964
965 for (i = 0; i < MESA_FORMAT_COUNT; i++) {
966 const struct gl_format_info *info = _mesa_get_format_info(i);
967 assert(info);
968
969 assert(info->Name == i);
970
971 if (info->Name == MESA_FORMAT_NONE)
972 continue;
973
974 if (info->BlockWidth == 1 && info->BlockHeight == 1) {
975 if (info->RedBits > 0) {
976 GLuint t = info->RedBits + info->GreenBits
977 + info->BlueBits + info->AlphaBits;
978 assert(t / 8 == info->BytesPerBlock);
979 (void) t;
980 }
981 }
982
983 assert(info->DataType == GL_UNSIGNED_NORMALIZED ||
984 info->DataType == GL_SIGNED_NORMALIZED ||
985 info->DataType == GL_UNSIGNED_INT ||
986 info->DataType == GL_FLOAT);
987
988 if (info->BaseFormat == GL_RGB) {
989 assert(info->RedBits > 0);
990 assert(info->GreenBits > 0);
991 assert(info->BlueBits > 0);
992 assert(info->AlphaBits == 0);
993 assert(info->LuminanceBits == 0);
994 assert(info->IntensityBits == 0);
995 }
996 else if (info->BaseFormat == GL_RGBA) {
997 assert(info->RedBits > 0);
998 assert(info->GreenBits > 0);
999 assert(info->BlueBits > 0);
1000 assert(info->AlphaBits > 0);
1001 assert(info->LuminanceBits == 0);
1002 assert(info->IntensityBits == 0);
1003 }
1004 else if (info->BaseFormat == GL_LUMINANCE) {
1005 assert(info->RedBits == 0);
1006 assert(info->GreenBits == 0);
1007 assert(info->BlueBits == 0);
1008 assert(info->AlphaBits == 0);
1009 assert(info->LuminanceBits > 0);
1010 assert(info->IntensityBits == 0);
1011 }
1012 else if (info->BaseFormat == GL_INTENSITY) {
1013 assert(info->RedBits == 0);
1014 assert(info->GreenBits == 0);
1015 assert(info->BlueBits == 0);
1016 assert(info->AlphaBits == 0);
1017 assert(info->LuminanceBits == 0);
1018 assert(info->IntensityBits > 0);
1019 }
1020
1021 }
1022 }
1023
1024
1025
1026 /**
1027 * Return datatype and number of components per texel for the given gl_format.
1028 * Only used for mipmap generation code.
1029 */
1030 void
1031 _mesa_format_to_type_and_comps(gl_format format,
1032 GLenum *datatype, GLuint *comps)
1033 {
1034 switch (format) {
1035 case MESA_FORMAT_RGBA8888:
1036 case MESA_FORMAT_RGBA8888_REV:
1037 case MESA_FORMAT_ARGB8888:
1038 case MESA_FORMAT_ARGB8888_REV:
1039 case MESA_FORMAT_XRGB8888:
1040 *datatype = GL_UNSIGNED_BYTE;
1041 *comps = 4;
1042 return;
1043 case MESA_FORMAT_RGB888:
1044 case MESA_FORMAT_BGR888:
1045 *datatype = GL_UNSIGNED_BYTE;
1046 *comps = 3;
1047 return;
1048 case MESA_FORMAT_RGB565:
1049 case MESA_FORMAT_RGB565_REV:
1050 *datatype = GL_UNSIGNED_SHORT_5_6_5;
1051 *comps = 3;
1052 return;
1053
1054 case MESA_FORMAT_ARGB4444:
1055 case MESA_FORMAT_ARGB4444_REV:
1056 *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1057 *comps = 4;
1058 return;
1059
1060 case MESA_FORMAT_ARGB1555:
1061 case MESA_FORMAT_ARGB1555_REV:
1062 *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
1063 *comps = 4;
1064 return;
1065
1066 case MESA_FORMAT_AL88:
1067 case MESA_FORMAT_AL88_REV:
1068 *datatype = GL_UNSIGNED_BYTE;
1069 *comps = 2;
1070 return;
1071
1072 case MESA_FORMAT_AL1616:
1073 case MESA_FORMAT_AL1616_REV:
1074 *datatype = GL_UNSIGNED_SHORT;
1075 *comps = 2;
1076 return;
1077
1078 case MESA_FORMAT_RGB332:
1079 *datatype = GL_UNSIGNED_BYTE_3_3_2;
1080 *comps = 3;
1081 return;
1082
1083 case MESA_FORMAT_A8:
1084 case MESA_FORMAT_L8:
1085 case MESA_FORMAT_I8:
1086 case MESA_FORMAT_CI8:
1087 *datatype = GL_UNSIGNED_BYTE;
1088 *comps = 1;
1089 return;
1090
1091 case MESA_FORMAT_YCBCR:
1092 case MESA_FORMAT_YCBCR_REV:
1093 *datatype = GL_UNSIGNED_SHORT;
1094 *comps = 2;
1095 return;
1096
1097 case MESA_FORMAT_Z24_S8:
1098 *datatype = GL_UNSIGNED_INT;
1099 *comps = 1; /* XXX OK? */
1100 return;
1101
1102 case MESA_FORMAT_S8_Z24:
1103 *datatype = GL_UNSIGNED_INT;
1104 *comps = 1; /* XXX OK? */
1105 return;
1106
1107 case MESA_FORMAT_Z16:
1108 *datatype = GL_UNSIGNED_SHORT;
1109 *comps = 1;
1110 return;
1111
1112 case MESA_FORMAT_X8_Z24:
1113 *datatype = GL_UNSIGNED_INT;
1114 *comps = 1;
1115 return;
1116
1117 case MESA_FORMAT_Z24_X8:
1118 *datatype = GL_UNSIGNED_INT;
1119 *comps = 1;
1120 return;
1121
1122 case MESA_FORMAT_Z32:
1123 *datatype = GL_UNSIGNED_INT;
1124 *comps = 1;
1125 return;
1126
1127 case MESA_FORMAT_DUDV8:
1128 *datatype = GL_BYTE;
1129 *comps = 2;
1130 return;
1131
1132 case MESA_FORMAT_SIGNED_RGBA8888:
1133 case MESA_FORMAT_SIGNED_RGBA8888_REV:
1134 *datatype = GL_BYTE;
1135 *comps = 4;
1136 return;
1137
1138 case MESA_FORMAT_SIGNED_R_16:
1139 *datatype = GL_SHORT;
1140 *comps = 1;
1141 return;
1142 case MESA_FORMAT_SIGNED_RG_16:
1143 *datatype = GL_SHORT;
1144 *comps = 2;
1145 return;
1146 case MESA_FORMAT_SIGNED_RGB_16:
1147 *datatype = GL_SHORT;
1148 *comps = 3;
1149 return;
1150 case MESA_FORMAT_SIGNED_RGBA_16:
1151 *datatype = GL_SHORT;
1152 *comps = 4;
1153 return;
1154
1155 #if FEATURE_EXT_texture_sRGB
1156 case MESA_FORMAT_SRGB8:
1157 *datatype = GL_UNSIGNED_BYTE;
1158 *comps = 3;
1159 return;
1160 case MESA_FORMAT_SRGBA8:
1161 case MESA_FORMAT_SARGB8:
1162 *datatype = GL_UNSIGNED_BYTE;
1163 *comps = 4;
1164 return;
1165 case MESA_FORMAT_SL8:
1166 *datatype = GL_UNSIGNED_BYTE;
1167 *comps = 1;
1168 return;
1169 case MESA_FORMAT_SLA8:
1170 *datatype = GL_UNSIGNED_BYTE;
1171 *comps = 2;
1172 return;
1173 #endif
1174
1175 #if FEATURE_texture_fxt1
1176 case MESA_FORMAT_RGB_FXT1:
1177 case MESA_FORMAT_RGBA_FXT1:
1178 #endif
1179 #if FEATURE_texture_s3tc
1180 case MESA_FORMAT_RGB_DXT1:
1181 case MESA_FORMAT_RGBA_DXT1:
1182 case MESA_FORMAT_RGBA_DXT3:
1183 case MESA_FORMAT_RGBA_DXT5:
1184 #if FEATURE_EXT_texture_sRGB
1185 case MESA_FORMAT_SRGB_DXT1:
1186 case MESA_FORMAT_SRGBA_DXT1:
1187 case MESA_FORMAT_SRGBA_DXT3:
1188 case MESA_FORMAT_SRGBA_DXT5:
1189 #endif
1190 /* XXX generate error instead? */
1191 *datatype = GL_UNSIGNED_BYTE;
1192 *comps = 0;
1193 return;
1194 #endif
1195
1196 case MESA_FORMAT_RGBA_FLOAT32:
1197 *datatype = GL_FLOAT;
1198 *comps = 4;
1199 return;
1200 case MESA_FORMAT_RGBA_FLOAT16:
1201 *datatype = GL_HALF_FLOAT_ARB;
1202 *comps = 4;
1203 return;
1204 case MESA_FORMAT_RGB_FLOAT32:
1205 *datatype = GL_FLOAT;
1206 *comps = 3;
1207 return;
1208 case MESA_FORMAT_RGB_FLOAT16:
1209 *datatype = GL_HALF_FLOAT_ARB;
1210 *comps = 3;
1211 return;
1212 case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:
1213 *datatype = GL_FLOAT;
1214 *comps = 2;
1215 return;
1216 case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:
1217 *datatype = GL_HALF_FLOAT_ARB;
1218 *comps = 2;
1219 return;
1220 case MESA_FORMAT_ALPHA_FLOAT32:
1221 case MESA_FORMAT_LUMINANCE_FLOAT32:
1222 case MESA_FORMAT_INTENSITY_FLOAT32:
1223 *datatype = GL_FLOAT;
1224 *comps = 1;
1225 return;
1226 case MESA_FORMAT_ALPHA_FLOAT16:
1227 case MESA_FORMAT_LUMINANCE_FLOAT16:
1228 case MESA_FORMAT_INTENSITY_FLOAT16:
1229 *datatype = GL_HALF_FLOAT_ARB;
1230 *comps = 1;
1231 return;
1232
1233 default:
1234 _mesa_problem(NULL, "bad format in _mesa_format_to_type_and_comps");
1235 *datatype = 0;
1236 *comps = 1;
1237 }
1238 }