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mesa/texformat: add integer fallbacks to other formats
[mesa.git] / src / mesa / main / texformat.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 /**
28 * \file texformat.c
29 * Texture formats.
30 *
31 * \author Gareth Hughes
32 * \author Brian Paul
33 */
34
35
36 #include "context.h"
37 #include "mfeatures.h"
38 #include "mtypes.h"
39 #include "texcompress.h"
40 #include "texformat.h"
41
42 #define RETURN_IF_SUPPORTED(f) do { \
43 if (ctx->TextureFormatSupported[f]) \
44 return f; \
45 } while (0)
46
47 /**
48 * Choose an appropriate texture format given the format, type and
49 * internalFormat parameters passed to glTexImage().
50 *
51 * \param ctx the GL context.
52 * \param internalFormat user's prefered internal texture format.
53 * \param format incoming image pixel format.
54 * \param type incoming image data type.
55 *
56 * \return a pointer to a gl_texture_format object which describes the
57 * choosen texture format, or NULL on failure.
58 *
59 * This is called via dd_function_table::ChooseTextureFormat. Hardware drivers
60 * will typically override this function with a specialized version.
61 */
62 gl_format
63 _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
64 GLenum format, GLenum type )
65 {
66 (void) format;
67 (void) type;
68
69 switch (internalFormat) {
70 /* shallow RGBA formats */
71 case 4:
72 case GL_RGBA:
73 if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
74 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
75 } else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
76 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);
77 }
78 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
79 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
80 break;
81
82 case GL_RGBA8:
83 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
84 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
85 break;
86 case GL_RGB5_A1:
87 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);
88 break;
89 case GL_RGBA2:
90 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444_REV); /* just to test another format*/
91 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
92 break;
93 case GL_RGBA4:
94 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
95 break;
96
97 /* deep RGBA formats */
98 case GL_RGB10_A2:
99 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB2101010);
100 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
101 break;
102 case GL_RGBA12:
103 case GL_RGBA16:
104 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
105 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
106 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
107 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
108 break;
109
110 /* shallow RGB formats */
111 case 3:
112 case GL_RGB:
113 case GL_RGB8:
114 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
115 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
116 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
117 break;
118 case GL_R3_G3_B2:
119 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB332);
120 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
121 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
122 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
123 break;
124 case GL_RGB4:
125 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565_REV); /* just to test another format */
126 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
127 break;
128 case GL_RGB5:
129 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
130 break;
131
132 /* deep RGB formats */
133 case GL_RGB10:
134 case GL_RGB12:
135 case GL_RGB16:
136 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
137 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
138 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
139 break;
140
141 /* Alpha formats */
142 case GL_ALPHA:
143 case GL_ALPHA4:
144 case GL_ALPHA8:
145 RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
146 break;
147
148 case GL_ALPHA12:
149 case GL_ALPHA16:
150 RETURN_IF_SUPPORTED(MESA_FORMAT_A16);
151 RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
152 break;
153
154 /* Luminance formats */
155 case 1:
156 case GL_LUMINANCE:
157 case GL_LUMINANCE4:
158 case GL_LUMINANCE8:
159 RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
160 break;
161
162 case GL_LUMINANCE12:
163 case GL_LUMINANCE16:
164 RETURN_IF_SUPPORTED(MESA_FORMAT_L16);
165 RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
166 break;
167
168 /* Luminance/Alpha formats */
169 case GL_LUMINANCE4_ALPHA4:
170 RETURN_IF_SUPPORTED(MESA_FORMAT_AL44);
171 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
172 break;
173
174 case 2:
175 case GL_LUMINANCE_ALPHA:
176 case GL_LUMINANCE6_ALPHA2:
177 case GL_LUMINANCE8_ALPHA8:
178 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
179 break;
180
181 case GL_LUMINANCE12_ALPHA4:
182 case GL_LUMINANCE12_ALPHA12:
183 case GL_LUMINANCE16_ALPHA16:
184 RETURN_IF_SUPPORTED(MESA_FORMAT_AL1616);
185 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
186 break;
187
188 case GL_INTENSITY:
189 case GL_INTENSITY4:
190 case GL_INTENSITY8:
191 RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
192 break;
193
194 case GL_INTENSITY12:
195 case GL_INTENSITY16:
196 RETURN_IF_SUPPORTED(MESA_FORMAT_I16);
197 RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
198 break;
199
200 default:
201 ; /* fallthrough */
202 }
203
204 if (ctx->Extensions.ARB_depth_texture) {
205 switch (internalFormat) {
206 case GL_DEPTH_COMPONENT:
207 case GL_DEPTH_COMPONENT24:
208 case GL_DEPTH_COMPONENT32:
209 RETURN_IF_SUPPORTED(MESA_FORMAT_Z32);
210 RETURN_IF_SUPPORTED(MESA_FORMAT_X8_Z24);
211 RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
212 break;
213 case GL_DEPTH_COMPONENT16:
214 RETURN_IF_SUPPORTED(MESA_FORMAT_Z16);
215 RETURN_IF_SUPPORTED(MESA_FORMAT_X8_Z24);
216 RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
217 default:
218 ; /* fallthrough */
219 }
220 }
221
222 switch (internalFormat) {
223 case GL_COMPRESSED_ALPHA_ARB:
224 RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
225 break;
226 case GL_COMPRESSED_LUMINANCE_ARB:
227 RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
228 break;
229 case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
230 RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
231 break;
232 case GL_COMPRESSED_INTENSITY_ARB:
233 RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
234 break;
235 case GL_COMPRESSED_RGB_ARB:
236 if (ctx->Extensions.EXT_texture_compression_s3tc ||
237 ctx->Extensions.S3_s3tc)
238 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
239 if (ctx->Extensions.TDFX_texture_compression_FXT1)
240 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
241 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
242 RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
243 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
244 break;
245 case GL_COMPRESSED_RGBA_ARB:
246 if (ctx->Extensions.EXT_texture_compression_s3tc ||
247 ctx->Extensions.S3_s3tc)
248 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */
249 if (ctx->Extensions.TDFX_texture_compression_FXT1)
250 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
251 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
252 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
253 break;
254 default:
255 ; /* fallthrough */
256 }
257
258 if (ctx->Extensions.MESA_ycbcr_texture) {
259 if (internalFormat == GL_YCBCR_MESA) {
260 if (type == GL_UNSIGNED_SHORT_8_8_MESA)
261 RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR);
262 else
263 RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR_REV);
264 }
265 }
266
267 #if FEATURE_texture_fxt1
268 if (ctx->Extensions.TDFX_texture_compression_FXT1) {
269 switch (internalFormat) {
270 case GL_COMPRESSED_RGB_FXT1_3DFX:
271 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
272 break;
273 case GL_COMPRESSED_RGBA_FXT1_3DFX:
274 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
275 break;
276 default:
277 ; /* fallthrough */
278 }
279 }
280 #endif
281
282 #if FEATURE_texture_s3tc
283 if (ctx->Extensions.EXT_texture_compression_s3tc) {
284 switch (internalFormat) {
285 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
286 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
287 break;
288 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
289 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT1);
290 break;
291 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
292 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);
293 break;
294 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
295 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT5);
296 break;
297 default:
298 ; /* fallthrough */
299 }
300 }
301
302 if (ctx->Extensions.S3_s3tc) {
303 switch (internalFormat) {
304 case GL_RGB_S3TC:
305 case GL_RGB4_S3TC:
306 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
307 break;
308 case GL_RGBA_S3TC:
309 case GL_RGBA4_S3TC:
310 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);
311 break;
312 default:
313 ; /* fallthrough */
314 }
315 }
316 #endif
317
318 if (ctx->Extensions.ARB_texture_float) {
319 switch (internalFormat) {
320 case GL_ALPHA16F_ARB:
321 RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT16);
322 RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT32);
323 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
324 break;
325 case GL_ALPHA32F_ARB:
326 RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT32);
327 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
328 break;
329 case GL_LUMINANCE16F_ARB:
330 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT16);
331 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT32);
332 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
333 break;
334 case GL_LUMINANCE32F_ARB:
335 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT32);
336 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
337 break;
338 case GL_LUMINANCE_ALPHA16F_ARB:
339 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16);
340 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32);
341 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
342 break;
343 case GL_LUMINANCE_ALPHA32F_ARB:
344 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32);
345 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
346 break;
347 case GL_INTENSITY16F_ARB:
348 RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT16);
349 RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT32);
350 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
351 break;
352 case GL_INTENSITY32F_ARB:
353 RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT32);
354 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
355 break;
356 case GL_RGB16F_ARB:
357 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
358 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
359 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
360 break;
361 case GL_RGB32F_ARB:
362 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
363 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
364 break;
365 case GL_RGBA16F_ARB:
366 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
367 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
368 break;
369 case GL_RGBA32F_ARB:
370 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
371 break;
372 default:
373 ; /* fallthrough */
374 }
375 }
376
377 if (ctx->Extensions.EXT_texture_shared_exponent) {
378 switch (internalFormat) {
379 case GL_RGB9_E5:
380 ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_RGB9_E5_FLOAT]);
381 return MESA_FORMAT_RGB9_E5_FLOAT;
382 default:
383 ; /* fallthrough */
384 }
385 }
386
387 if (ctx->Extensions.EXT_packed_float) {
388 switch (internalFormat) {
389 case GL_R11F_G11F_B10F:
390 ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_R11_G11_B10_FLOAT]);
391 return MESA_FORMAT_R11_G11_B10_FLOAT;
392 default:
393 ; /* fallthrough */
394 }
395 }
396
397 if (ctx->Extensions.EXT_packed_depth_stencil) {
398 switch (internalFormat) {
399 case GL_DEPTH_STENCIL_EXT:
400 case GL_DEPTH24_STENCIL8_EXT:
401 RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_S8);
402 RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
403 break;
404 default:
405 ; /* fallthrough */
406 }
407 }
408
409 if (ctx->Extensions.ARB_depth_buffer_float) {
410 switch (internalFormat) {
411 case GL_DEPTH_COMPONENT32F:
412 ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_Z32_FLOAT]);
413 return MESA_FORMAT_Z32_FLOAT;
414 case GL_DEPTH32F_STENCIL8:
415 ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_Z32_FLOAT_X24S8]);
416 return MESA_FORMAT_Z32_FLOAT_X24S8;
417 default:
418 ; /* fallthrough */
419 }
420 }
421
422 if (ctx->Extensions.ATI_envmap_bumpmap) {
423 switch (internalFormat) {
424 case GL_DUDV_ATI:
425 case GL_DU8DV8_ATI:
426 RETURN_IF_SUPPORTED(MESA_FORMAT_DUDV8);
427 break;
428 default:
429 ; /* fallthrough */
430 }
431 }
432
433 if (ctx->Extensions.EXT_texture_snorm) {
434 switch (internalFormat) {
435 case GL_RED_SNORM:
436 case GL_R8_SNORM:
437 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R8);
438 break;
439 case GL_RG_SNORM:
440 case GL_RG8_SNORM:
441 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG88_REV);
442 break;
443 case GL_RGB_SNORM:
444 case GL_RGB8_SNORM:
445 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBX8888);
446 /* FALLTHROUGH */
447 case GL_RGBA_SNORM:
448 case GL_RGBA8_SNORM:
449 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
450 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
451 break;
452 case GL_ALPHA_SNORM:
453 case GL_ALPHA8_SNORM:
454 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_A8);
455 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
456 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
457 break;
458 case GL_LUMINANCE_SNORM:
459 case GL_LUMINANCE8_SNORM:
460 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_L8);
461 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBX8888);
462 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
463 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
464 break;
465 case GL_LUMINANCE_ALPHA_SNORM:
466 case GL_LUMINANCE8_ALPHA8_SNORM:
467 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_AL88);
468 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
469 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
470 break;
471 case GL_INTENSITY_SNORM:
472 case GL_INTENSITY8_SNORM:
473 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_I8);
474 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
475 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
476 break;
477 case GL_R16_SNORM:
478 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R16);
479 break;
480 case GL_RG16_SNORM:
481 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_GR1616);
482 break;
483 case GL_RGB16_SNORM:
484 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGB_16);
485 /* FALLTHROUGH */
486 case GL_RGBA16_SNORM:
487 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
488 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
489 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
490 break;
491 case GL_ALPHA16_SNORM:
492 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_A16);
493 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
494 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
495 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
496 break;
497 case GL_LUMINANCE16_SNORM:
498 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_L16);
499 /* FALLTHROUGH */
500 case GL_LUMINANCE16_ALPHA16_SNORM:
501 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_AL1616);
502 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
503 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
504 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
505 break;
506 case GL_INTENSITY16_SNORM:
507 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_I16);
508 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
509 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
510 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
511 break;
512 default:
513 ; /* fall-through */
514 }
515 }
516
517 #if FEATURE_EXT_texture_sRGB
518 if (ctx->Extensions.EXT_texture_sRGB) {
519 switch (internalFormat) {
520 case GL_SRGB_EXT:
521 case GL_SRGB8_EXT:
522 RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
523 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
524 break;
525 case GL_SRGB_ALPHA_EXT:
526 case GL_SRGB8_ALPHA8_EXT:
527 RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
528 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
529 break;
530 case GL_SLUMINANCE_EXT:
531 case GL_SLUMINANCE8_EXT:
532 RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
533 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
534 break;
535 case GL_SLUMINANCE_ALPHA_EXT:
536 case GL_SLUMINANCE8_ALPHA8_EXT:
537 RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
538 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
539 break;
540 case GL_COMPRESSED_SLUMINANCE_EXT:
541 RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
542 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
543 break;
544 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
545 RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
546 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
547 break;
548 case GL_COMPRESSED_SRGB_EXT:
549 #if FEATURE_texture_s3tc
550 if (ctx->Extensions.EXT_texture_compression_s3tc)
551 RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
552 #endif
553 RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
554 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
555 break;
556 case GL_COMPRESSED_SRGB_ALPHA_EXT:
557 #if FEATURE_texture_s3tc
558 if (ctx->Extensions.EXT_texture_compression_s3tc)
559 RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */
560 #endif
561 RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
562 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
563 break;
564 #if FEATURE_texture_s3tc
565 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
566 if (ctx->Extensions.EXT_texture_compression_s3tc)
567 RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
568 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
569 break;
570 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
571 if (ctx->Extensions.EXT_texture_compression_s3tc)
572 RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT1);
573 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
574 break;
575 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
576 if (ctx->Extensions.EXT_texture_compression_s3tc)
577 RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3);
578 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
579 break;
580 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
581 if (ctx->Extensions.EXT_texture_compression_s3tc)
582 RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT5);
583 RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
584 break;
585 #endif
586 default:
587 ; /* fallthrough */
588 }
589 }
590 #endif /* FEATURE_EXT_texture_sRGB */
591
592 if (ctx->Extensions.EXT_texture_integer) {
593 switch (internalFormat) {
594 case GL_ALPHA8UI_EXT:
595 RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_UINT8);
596 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
597 break;
598 case GL_ALPHA16UI_EXT:
599 RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_UINT16);
600 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
601 break;
602 case GL_ALPHA32UI_EXT:
603 RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_UINT32);
604 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
605 break;
606 case GL_ALPHA8I_EXT:
607 RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_INT8);
608 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
609 break;
610 case GL_ALPHA16I_EXT:
611 RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_INT16);
612 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
613 break;
614 case GL_ALPHA32I_EXT:
615 RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_INT32);
616 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
617 break;
618 case GL_LUMINANCE8UI_EXT:
619 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_UINT8);
620 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
621 break;
622 case GL_LUMINANCE16UI_EXT:
623 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_UINT16);
624 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
625 break;
626 case GL_LUMINANCE32UI_EXT:
627 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_UINT32);
628 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
629 break;
630 case GL_LUMINANCE8I_EXT:
631 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_INT8);
632 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
633 break;
634 case GL_LUMINANCE16I_EXT:
635 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_INT16);
636 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
637 break;
638 case GL_LUMINANCE32I_EXT:
639 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_INT32);
640 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
641 break;
642 case GL_LUMINANCE_ALPHA8UI_EXT:
643 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_UINT8);
644 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
645 break;
646 case GL_LUMINANCE_ALPHA16UI_EXT:
647 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_UINT16);
648 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
649 break;
650 case GL_LUMINANCE_ALPHA32UI_EXT:
651 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_UINT32);
652 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
653 break;
654 case GL_LUMINANCE_ALPHA8I_EXT:
655 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_INT8);
656 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
657 break;
658 case GL_LUMINANCE_ALPHA16I_EXT:
659 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_INT16);
660 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
661 break;
662 case GL_LUMINANCE_ALPHA32I_EXT:
663 RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_INT32);
664 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
665 break;
666 case GL_INTENSITY8UI_EXT:
667 RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_UINT8);
668 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
669 break;
670 case GL_INTENSITY16UI_EXT:
671 RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_UINT16);
672 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
673 break;
674 case GL_INTENSITY32UI_EXT:
675 RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_UINT32);
676 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
677 break;
678 case GL_INTENSITY8I_EXT:
679 RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_INT8);
680 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
681 break;
682 case GL_INTENSITY16I_EXT:
683 RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_INT16);
684 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
685 break;
686 case GL_INTENSITY32I_EXT:
687 RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_INT32);
688 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
689 break;
690 case GL_RGB8UI_EXT:
691 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT8);
692 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
693 break;
694 case GL_RGB16UI_EXT:
695 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT16);
696 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
697 break;
698 case GL_RGB32UI_EXT:
699 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT32);
700 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
701 break;
702 case GL_RGB8I_EXT:
703 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT8);
704 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
705 break;
706 case GL_RGB16I_EXT:
707 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT16);
708 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
709 break;
710 case GL_RGB32I_EXT:
711 RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT32);
712 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
713 break;
714 case GL_RGBA8UI_EXT:
715 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
716 break;
717 case GL_RGBA16UI_EXT:
718 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
719 break;
720 case GL_RGBA32UI_EXT:
721 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
722 break;
723 case GL_RGBA8I_EXT:
724 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
725 break;
726 case GL_RGBA16I_EXT:
727 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
728 break;
729 case GL_RGBA32I_EXT:
730 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
731 break;
732 }
733 }
734
735 if (ctx->Extensions.ARB_texture_rg) {
736 switch (internalFormat) {
737 case GL_R8:
738 case GL_RED:
739 RETURN_IF_SUPPORTED(MESA_FORMAT_R8);
740 break;
741
742 case GL_COMPRESSED_RED:
743 RETURN_IF_SUPPORTED(MESA_FORMAT_RED_RGTC1);
744 RETURN_IF_SUPPORTED(MESA_FORMAT_R8);
745 break;
746
747 case GL_R16:
748 RETURN_IF_SUPPORTED(MESA_FORMAT_R16);
749 break;
750
751 case GL_RG:
752 case GL_RG8:
753 RETURN_IF_SUPPORTED(MESA_FORMAT_RG88);
754 break;
755
756 case GL_COMPRESSED_RG:
757 RETURN_IF_SUPPORTED(MESA_FORMAT_RG_RGTC2);
758 RETURN_IF_SUPPORTED(MESA_FORMAT_RG88);
759 break;
760
761 case GL_RG16:
762 RETURN_IF_SUPPORTED(MESA_FORMAT_RG1616);
763 break;
764
765 default:
766 ; /* fallthrough */
767 }
768 }
769
770 if (ctx->Extensions.ARB_texture_rg && ctx->Extensions.ARB_texture_float) {
771 switch (internalFormat) {
772 case GL_R16F:
773 RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT16);
774 RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
775 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
776 break;
777 case GL_R32F:
778 RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
779 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
780 break;
781 case GL_RG16F:
782 RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
783 RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
784 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
785 break;
786 case GL_RG32F:
787 RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
788 RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
789 break;
790
791 default:
792 ; /* fallthrough */
793 }
794 }
795
796 if (ctx->Extensions.ARB_texture_rg && ctx->Extensions.EXT_texture_integer) {
797 switch (internalFormat) {
798 case GL_R8UI:
799 RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT8);
800 break;
801 case GL_RG8UI:
802 RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT8);
803 break;
804 case GL_R16UI:
805 RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT16);
806 break;
807 case GL_RG16UI:
808 RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT16);
809 break;
810 case GL_R32UI:
811 RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT32);
812 break;
813 case GL_RG32UI:
814 RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT32);
815 break;
816 case GL_R8I:
817 RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT8);
818 break;
819 case GL_RG8I:
820 RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT8);
821 break;
822 case GL_R16I:
823 RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT16);
824 break;
825 case GL_RG16I:
826 RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT16);
827 break;
828 case GL_R32I:
829 RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT32);
830 break;
831 case GL_RG32I:
832 RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT32);
833 break;
834 default:
835 break;
836 }
837 }
838
839 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
840 */
841 if (ctx->API != API_OPENGL) {
842 switch (internalFormat) {
843 case GL_BGRA:
844 RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
845 break;
846
847 default:
848 ; /* fallthrough */
849 }
850 }
851
852 if (ctx->Extensions.ARB_texture_compression_rgtc) {
853 switch (internalFormat) {
854 case GL_COMPRESSED_RED_RGTC1:
855 RETURN_IF_SUPPORTED(MESA_FORMAT_RED_RGTC1);
856 break;
857 case GL_COMPRESSED_SIGNED_RED_RGTC1:
858 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RED_RGTC1);
859 break;
860 case GL_COMPRESSED_RG_RGTC2:
861 RETURN_IF_SUPPORTED(MESA_FORMAT_RG_RGTC2);
862 break;
863 case GL_COMPRESSED_SIGNED_RG_RGTC2:
864 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG_RGTC2);
865 break;
866 default:
867 ; /* fallthrough */
868 }
869 }
870
871 if (ctx->Extensions.EXT_texture_compression_latc) {
872 switch (internalFormat) {
873 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
874 RETURN_IF_SUPPORTED(MESA_FORMAT_L_LATC1);
875 break;
876 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
877 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_L_LATC1);
878 break;
879 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
880 RETURN_IF_SUPPORTED(MESA_FORMAT_LA_LATC2);
881 break;
882 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
883 RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_LA_LATC2);
884 break;
885 default:
886 ; /* fallthrough */
887 }
888 }
889
890 if (ctx->Extensions.ATI_texture_compression_3dc) {
891 switch (internalFormat) {
892 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
893 RETURN_IF_SUPPORTED(MESA_FORMAT_LA_LATC2);
894 break;
895 default:
896 ; /* fallthrough */
897 }
898 }
899
900 _mesa_problem(ctx, "unexpected format in _mesa_choose_tex_format()");
901 return MESA_FORMAT_NONE;
902 }
903