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mesa/glformats: recognize ASTC formats as compressed
[mesa.git] / src / mesa / main / glformats.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008-2009 VMware, Inc.
6 * Copyright (c) 2012 Intel Corporation
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28 #include "context.h"
29 #include "glformats.h"
30 #include "formats.h"
31 #include "enums.h"
32
33 enum {
34 ZERO = 4,
35 ONE = 5
36 };
37
38 enum {
39 IDX_LUMINANCE = 0,
40 IDX_ALPHA,
41 IDX_INTENSITY,
42 IDX_LUMINANCE_ALPHA,
43 IDX_RGB,
44 IDX_RGBA,
45 IDX_RED,
46 IDX_GREEN,
47 IDX_BLUE,
48 IDX_BGR,
49 IDX_BGRA,
50 IDX_ABGR,
51 IDX_RG,
52 MAX_IDX
53 };
54
55 #define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
56 #define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
57 #define MAP3(x,y,z) MAP4(x, y, z, ZERO)
58 #define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
59
60 static const struct {
61 GLubyte format_idx;
62 GLubyte to_rgba[6];
63 GLubyte from_rgba[6];
64 } mappings[MAX_IDX] =
65 {
66 {
67 IDX_LUMINANCE,
68 MAP4(0,0,0,ONE),
69 MAP1(0)
70 },
71
72 {
73 IDX_ALPHA,
74 MAP4(ZERO, ZERO, ZERO, 0),
75 MAP1(3)
76 },
77
78 {
79 IDX_INTENSITY,
80 MAP4(0, 0, 0, 0),
81 MAP1(0),
82 },
83
84 {
85 IDX_LUMINANCE_ALPHA,
86 MAP4(0,0,0,1),
87 MAP2(0,3)
88 },
89
90 {
91 IDX_RGB,
92 MAP4(0,1,2,ONE),
93 MAP3(0,1,2)
94 },
95
96 {
97 IDX_RGBA,
98 MAP4(0,1,2,3),
99 MAP4(0,1,2,3),
100 },
101
102 {
103 IDX_RED,
104 MAP4(0, ZERO, ZERO, ONE),
105 MAP1(0),
106 },
107
108 {
109 IDX_GREEN,
110 MAP4(ZERO, 0, ZERO, ONE),
111 MAP1(1),
112 },
113
114 {
115 IDX_BLUE,
116 MAP4(ZERO, ZERO, 0, ONE),
117 MAP1(2),
118 },
119
120 {
121 IDX_BGR,
122 MAP4(2,1,0,ONE),
123 MAP3(2,1,0)
124 },
125
126 {
127 IDX_BGRA,
128 MAP4(2,1,0,3),
129 MAP4(2,1,0,3)
130 },
131
132 {
133 IDX_ABGR,
134 MAP4(3,2,1,0),
135 MAP4(3,2,1,0)
136 },
137
138 {
139 IDX_RG,
140 MAP4(0, 1, ZERO, ONE),
141 MAP2(0, 1)
142 },
143 };
144
145 /**
146 * Convert a GL image format enum to an IDX_* value (see above).
147 */
148 static int
149 get_map_idx(GLenum value)
150 {
151 switch (value) {
152 case GL_LUMINANCE:
153 case GL_LUMINANCE_INTEGER_EXT:
154 return IDX_LUMINANCE;
155 case GL_ALPHA:
156 case GL_ALPHA_INTEGER:
157 return IDX_ALPHA;
158 case GL_INTENSITY:
159 return IDX_INTENSITY;
160 case GL_LUMINANCE_ALPHA:
161 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
162 return IDX_LUMINANCE_ALPHA;
163 case GL_RGB:
164 case GL_RGB_INTEGER:
165 return IDX_RGB;
166 case GL_RGBA:
167 case GL_RGBA_INTEGER:
168 return IDX_RGBA;
169 case GL_RED:
170 case GL_RED_INTEGER:
171 return IDX_RED;
172 case GL_GREEN:
173 return IDX_GREEN;
174 case GL_BLUE:
175 return IDX_BLUE;
176 case GL_BGR:
177 case GL_BGR_INTEGER:
178 return IDX_BGR;
179 case GL_BGRA:
180 case GL_BGRA_INTEGER:
181 return IDX_BGRA;
182 case GL_ABGR_EXT:
183 return IDX_ABGR;
184 case GL_RG:
185 case GL_RG_INTEGER:
186 return IDX_RG;
187 default:
188 _mesa_problem(NULL, "Unexpected inFormat %s",
189 _mesa_enum_to_string(value));
190 return 0;
191 }
192 }
193
194 /**
195 * When promoting texture formats (see below) we need to compute the
196 * mapping of dest components back to source components.
197 * This function does that.
198 * \param inFormat the incoming format of the texture
199 * \param outFormat the final texture format
200 * \return map[6] a full 6-component map
201 */
202 void
203 _mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
204 {
205 const int inFmt = get_map_idx(inFormat);
206 const int outFmt = get_map_idx(outFormat);
207 const GLubyte *in2rgba = mappings[inFmt].to_rgba;
208 const GLubyte *rgba2out = mappings[outFmt].from_rgba;
209 int i;
210
211 for (i = 0; i < 4; i++)
212 map[i] = in2rgba[rgba2out[i]];
213
214 map[ZERO] = ZERO;
215 map[ONE] = ONE;
216
217 #if 0
218 printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
219 inFormat, _mesa_enum_to_string(inFormat),
220 outFormat, _mesa_enum_to_string(outFormat),
221 map[0],
222 map[1],
223 map[2],
224 map[3],
225 map[4],
226 map[5]);
227 #endif
228 }
229
230 /**
231 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
232 */
233 GLboolean
234 _mesa_type_is_packed(GLenum type)
235 {
236 switch (type) {
237 case GL_UNSIGNED_BYTE_3_3_2:
238 case GL_UNSIGNED_BYTE_2_3_3_REV:
239 case MESA_UNSIGNED_BYTE_4_4:
240 case GL_UNSIGNED_SHORT_5_6_5:
241 case GL_UNSIGNED_SHORT_5_6_5_REV:
242 case GL_UNSIGNED_SHORT_4_4_4_4:
243 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
244 case GL_UNSIGNED_SHORT_5_5_5_1:
245 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
246 case GL_UNSIGNED_INT_8_8_8_8:
247 case GL_UNSIGNED_INT_8_8_8_8_REV:
248 case GL_UNSIGNED_INT_10_10_10_2:
249 case GL_UNSIGNED_INT_2_10_10_10_REV:
250 case GL_UNSIGNED_SHORT_8_8_MESA:
251 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
252 case GL_UNSIGNED_INT_24_8_EXT:
253 case GL_UNSIGNED_INT_5_9_9_9_REV:
254 case GL_UNSIGNED_INT_10F_11F_11F_REV:
255 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
256 return GL_TRUE;
257 }
258
259 return GL_FALSE;
260 }
261
262
263 /**
264 * Get the size of a GL data type.
265 *
266 * \param type GL data type.
267 *
268 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
269 * if an invalid type enum.
270 */
271 GLint
272 _mesa_sizeof_type(GLenum type)
273 {
274 switch (type) {
275 case GL_BITMAP:
276 return 0;
277 case GL_UNSIGNED_BYTE:
278 return sizeof(GLubyte);
279 case GL_BYTE:
280 return sizeof(GLbyte);
281 case GL_UNSIGNED_SHORT:
282 return sizeof(GLushort);
283 case GL_SHORT:
284 return sizeof(GLshort);
285 case GL_UNSIGNED_INT:
286 return sizeof(GLuint);
287 case GL_INT:
288 return sizeof(GLint);
289 case GL_FLOAT:
290 return sizeof(GLfloat);
291 case GL_DOUBLE:
292 return sizeof(GLdouble);
293 case GL_HALF_FLOAT_ARB:
294 case GL_HALF_FLOAT_OES:
295 return sizeof(GLhalfARB);
296 case GL_FIXED:
297 return sizeof(GLfixed);
298 default:
299 return -1;
300 }
301 }
302
303
304 /**
305 * Same as _mesa_sizeof_type() but also accepting the packed pixel
306 * format data types.
307 */
308 GLint
309 _mesa_sizeof_packed_type(GLenum type)
310 {
311 switch (type) {
312 case GL_BITMAP:
313 return 0;
314 case GL_UNSIGNED_BYTE:
315 return sizeof(GLubyte);
316 case GL_BYTE:
317 return sizeof(GLbyte);
318 case GL_UNSIGNED_SHORT:
319 return sizeof(GLushort);
320 case GL_SHORT:
321 return sizeof(GLshort);
322 case GL_UNSIGNED_INT:
323 return sizeof(GLuint);
324 case GL_INT:
325 return sizeof(GLint);
326 case GL_HALF_FLOAT_ARB:
327 case GL_HALF_FLOAT_OES:
328 return sizeof(GLhalfARB);
329 case GL_FLOAT:
330 return sizeof(GLfloat);
331 case GL_UNSIGNED_BYTE_3_3_2:
332 case GL_UNSIGNED_BYTE_2_3_3_REV:
333 case MESA_UNSIGNED_BYTE_4_4:
334 return sizeof(GLubyte);
335 case GL_UNSIGNED_SHORT_5_6_5:
336 case GL_UNSIGNED_SHORT_5_6_5_REV:
337 case GL_UNSIGNED_SHORT_4_4_4_4:
338 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
339 case GL_UNSIGNED_SHORT_5_5_5_1:
340 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
341 case GL_UNSIGNED_SHORT_8_8_MESA:
342 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
343 return sizeof(GLushort);
344 case GL_UNSIGNED_INT_8_8_8_8:
345 case GL_UNSIGNED_INT_8_8_8_8_REV:
346 case GL_UNSIGNED_INT_10_10_10_2:
347 case GL_UNSIGNED_INT_2_10_10_10_REV:
348 case GL_UNSIGNED_INT_24_8_EXT:
349 case GL_UNSIGNED_INT_5_9_9_9_REV:
350 case GL_UNSIGNED_INT_10F_11F_11F_REV:
351 return sizeof(GLuint);
352 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
353 return 8;
354 default:
355 return -1;
356 }
357 }
358
359
360 /**
361 * Get the number of components in a pixel format.
362 *
363 * \param format pixel format.
364 *
365 * \return the number of components in the given format, or -1 if a bad format.
366 */
367 GLint
368 _mesa_components_in_format(GLenum format)
369 {
370 switch (format) {
371 case GL_COLOR_INDEX:
372 case GL_STENCIL_INDEX:
373 case GL_DEPTH_COMPONENT:
374 case GL_RED:
375 case GL_RED_INTEGER_EXT:
376 case GL_GREEN:
377 case GL_GREEN_INTEGER_EXT:
378 case GL_BLUE:
379 case GL_BLUE_INTEGER_EXT:
380 case GL_ALPHA:
381 case GL_ALPHA_INTEGER_EXT:
382 case GL_LUMINANCE:
383 case GL_LUMINANCE_INTEGER_EXT:
384 case GL_INTENSITY:
385 return 1;
386
387 case GL_LUMINANCE_ALPHA:
388 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
389 case GL_RG:
390 case GL_YCBCR_MESA:
391 case GL_DEPTH_STENCIL_EXT:
392 case GL_RG_INTEGER:
393 return 2;
394
395 case GL_RGB:
396 case GL_BGR:
397 case GL_RGB_INTEGER_EXT:
398 case GL_BGR_INTEGER_EXT:
399 return 3;
400
401 case GL_RGBA:
402 case GL_BGRA:
403 case GL_ABGR_EXT:
404 case GL_RGBA_INTEGER_EXT:
405 case GL_BGRA_INTEGER_EXT:
406 return 4;
407
408 default:
409 return -1;
410 }
411 }
412
413
414 /**
415 * Get the bytes per pixel of pixel format type pair.
416 *
417 * \param format pixel format.
418 * \param type pixel type.
419 *
420 * \return bytes per pixel, or -1 if a bad format or type was given.
421 */
422 GLint
423 _mesa_bytes_per_pixel(GLenum format, GLenum type)
424 {
425 GLint comps = _mesa_components_in_format(format);
426 if (comps < 0)
427 return -1;
428
429 switch (type) {
430 case GL_BITMAP:
431 return 0; /* special case */
432 case GL_BYTE:
433 case GL_UNSIGNED_BYTE:
434 return comps * sizeof(GLubyte);
435 case GL_SHORT:
436 case GL_UNSIGNED_SHORT:
437 return comps * sizeof(GLshort);
438 case GL_INT:
439 case GL_UNSIGNED_INT:
440 return comps * sizeof(GLint);
441 case GL_FLOAT:
442 return comps * sizeof(GLfloat);
443 case GL_HALF_FLOAT_ARB:
444 case GL_HALF_FLOAT_OES:
445 return comps * sizeof(GLhalfARB);
446 case GL_UNSIGNED_BYTE_3_3_2:
447 case GL_UNSIGNED_BYTE_2_3_3_REV:
448 if (format == GL_RGB || format == GL_BGR ||
449 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
450 return sizeof(GLubyte);
451 else
452 return -1; /* error */
453 case GL_UNSIGNED_SHORT_5_6_5:
454 case GL_UNSIGNED_SHORT_5_6_5_REV:
455 if (format == GL_RGB || format == GL_BGR ||
456 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
457 return sizeof(GLushort);
458 else
459 return -1; /* error */
460 case GL_UNSIGNED_SHORT_4_4_4_4:
461 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
462 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
463 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
464 return sizeof(GLushort);
465 else
466 return -1;
467 case GL_UNSIGNED_SHORT_5_5_5_1:
468 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
469 if (format == GL_RGBA || format == GL_BGRA ||
470 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
471 return sizeof(GLushort);
472 else
473 return -1;
474 case GL_UNSIGNED_INT_8_8_8_8:
475 case GL_UNSIGNED_INT_8_8_8_8_REV:
476 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
477 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
478 format == GL_RGB)
479 return sizeof(GLuint);
480 else
481 return -1;
482 case GL_UNSIGNED_INT_10_10_10_2:
483 case GL_UNSIGNED_INT_2_10_10_10_REV:
484 if (format == GL_RGBA || format == GL_BGRA ||
485 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
486 format == GL_RGB)
487 return sizeof(GLuint);
488 else
489 return -1;
490 case GL_UNSIGNED_SHORT_8_8_MESA:
491 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
492 if (format == GL_YCBCR_MESA)
493 return sizeof(GLushort);
494 else
495 return -1;
496 case GL_UNSIGNED_INT_24_8_EXT:
497 if (format == GL_DEPTH_STENCIL_EXT)
498 return sizeof(GLuint);
499 else
500 return -1;
501 case GL_UNSIGNED_INT_5_9_9_9_REV:
502 if (format == GL_RGB)
503 return sizeof(GLuint);
504 else
505 return -1;
506 case GL_UNSIGNED_INT_10F_11F_11F_REV:
507 if (format == GL_RGB)
508 return sizeof(GLuint);
509 else
510 return -1;
511 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
512 if (format == GL_DEPTH_STENCIL)
513 return 8;
514 else
515 return -1;
516 default:
517 return -1;
518 }
519 }
520
521
522 /**
523 * Get the number of bytes for a vertex attrib with the given number of
524 * components and type.
525 *
526 * \param comps number of components.
527 * \param type data type.
528 *
529 * \return bytes per attribute, or -1 if a bad comps/type combination was given.
530 */
531 GLint
532 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
533 {
534 switch (type) {
535 case GL_BYTE:
536 case GL_UNSIGNED_BYTE:
537 return comps * sizeof(GLubyte);
538 case GL_SHORT:
539 case GL_UNSIGNED_SHORT:
540 return comps * sizeof(GLshort);
541 case GL_INT:
542 case GL_UNSIGNED_INT:
543 return comps * sizeof(GLint);
544 case GL_FLOAT:
545 return comps * sizeof(GLfloat);
546 case GL_HALF_FLOAT_ARB:
547 return comps * sizeof(GLhalfARB);
548 case GL_DOUBLE:
549 return comps * sizeof(GLdouble);
550 case GL_FIXED:
551 return comps * sizeof(GLfixed);
552 case GL_INT_2_10_10_10_REV:
553 case GL_UNSIGNED_INT_2_10_10_10_REV:
554 if (comps == 4)
555 return sizeof(GLuint);
556 else
557 return -1;
558 case GL_UNSIGNED_INT_10F_11F_11F_REV:
559 if (comps == 3)
560 return sizeof(GLuint);
561 else
562 return -1;
563 default:
564 return -1;
565 }
566 }
567
568 /**
569 * Test if the given format is unsized.
570 */
571 GLboolean
572 _mesa_is_enum_format_unsized(GLenum format)
573 {
574 switch (format) {
575 case GL_RGBA:
576 case GL_BGRA:
577 case GL_ABGR_EXT:
578 case GL_RGB:
579 case GL_BGR:
580 case GL_RG:
581 case GL_RED:
582 case GL_GREEN:
583 case GL_BLUE:
584 case GL_ALPHA:
585 case GL_INTENSITY:
586 case GL_LUMINANCE:
587 case GL_LUMINANCE_ALPHA:
588
589 case GL_SRGB:
590 case GL_SRGB_ALPHA:
591 case GL_SLUMINANCE:
592 case GL_SLUMINANCE_ALPHA:
593
594 case GL_RGBA_SNORM:
595 case GL_RGB_SNORM:
596 case GL_RG_SNORM:
597 case GL_RED_SNORM:
598 case GL_ALPHA_SNORM:
599 case GL_INTENSITY_SNORM:
600 case GL_LUMINANCE_SNORM:
601 case GL_LUMINANCE_ALPHA_SNORM:
602
603 case GL_RED_INTEGER:
604 case GL_GREEN_INTEGER:
605 case GL_BLUE_INTEGER:
606 case GL_ALPHA_INTEGER:
607 case GL_RGB_INTEGER:
608 case GL_RGBA_INTEGER:
609 case GL_BGR_INTEGER:
610 case GL_BGRA_INTEGER:
611 case GL_RG_INTEGER:
612 case GL_LUMINANCE_INTEGER_EXT:
613 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
614
615 case GL_DEPTH_COMPONENT:
616 case GL_DEPTH_STENCIL:
617 case GL_STENCIL_INDEX:
618 return GL_TRUE;
619 default:
620 return GL_FALSE;
621 }
622 }
623
624 /**
625 * Test if the given format is a UNORM (unsigned-normalized) format.
626 */
627 GLboolean
628 _mesa_is_enum_format_unorm(GLenum format)
629 {
630 switch(format) {
631 case GL_RED:
632 case GL_GREEN:
633 case GL_BLUE:
634 case GL_ALPHA:
635 case GL_ALPHA4:
636 case GL_ALPHA8:
637 case GL_ALPHA12:
638 case GL_ALPHA16:
639 case 1:
640 case GL_LUMINANCE:
641 case GL_SLUMINANCE:
642 case GL_LUMINANCE4:
643 case GL_LUMINANCE8:
644 case GL_LUMINANCE12:
645 case GL_LUMINANCE16:
646 case 2:
647 case GL_LUMINANCE_ALPHA:
648 case GL_SLUMINANCE_ALPHA:
649 case GL_LUMINANCE4_ALPHA4:
650 case GL_LUMINANCE6_ALPHA2:
651 case GL_LUMINANCE8_ALPHA8:
652 case GL_LUMINANCE12_ALPHA4:
653 case GL_LUMINANCE12_ALPHA12:
654 case GL_LUMINANCE16_ALPHA16:
655 case GL_INTENSITY:
656 case GL_INTENSITY4:
657 case GL_INTENSITY8:
658 case GL_INTENSITY12:
659 case GL_INTENSITY16:
660 case GL_R8:
661 case GL_R16:
662 case GL_RG:
663 case GL_RG8:
664 case GL_RG16:
665 case 3:
666 case GL_RGB:
667 case GL_BGR:
668 case GL_SRGB:
669 case GL_R3_G3_B2:
670 case GL_RGB4:
671 case GL_RGB5:
672 case GL_RGB565:
673 case GL_RGB8:
674 case GL_RGB10:
675 case GL_RGB12:
676 case GL_RGB16:
677 case 4:
678 case GL_ABGR_EXT:
679 case GL_RGBA:
680 case GL_BGRA:
681 case GL_SRGB_ALPHA:
682 case GL_RGBA2:
683 case GL_RGBA4:
684 case GL_RGB5_A1:
685 case GL_RGBA8:
686 case GL_RGB10_A2:
687 case GL_RGBA12:
688 case GL_RGBA16:
689 return GL_TRUE;
690 default:
691 return GL_FALSE;
692 }
693 }
694
695 /**
696 * Test if the given format is a SNORM (signed-normalized) format.
697 */
698 GLboolean
699 _mesa_is_enum_format_snorm(GLenum format)
700 {
701 switch (format) {
702 /* signed, normalized texture formats */
703 case GL_RED_SNORM:
704 case GL_R8_SNORM:
705 case GL_R16_SNORM:
706 case GL_RG_SNORM:
707 case GL_RG8_SNORM:
708 case GL_RG16_SNORM:
709 case GL_RGB_SNORM:
710 case GL_RGB8_SNORM:
711 case GL_RGB16_SNORM:
712 case GL_RGBA_SNORM:
713 case GL_RGBA8_SNORM:
714 case GL_RGBA16_SNORM:
715 case GL_ALPHA_SNORM:
716 case GL_ALPHA8_SNORM:
717 case GL_ALPHA16_SNORM:
718 case GL_LUMINANCE_SNORM:
719 case GL_LUMINANCE8_SNORM:
720 case GL_LUMINANCE16_SNORM:
721 case GL_LUMINANCE_ALPHA_SNORM:
722 case GL_LUMINANCE8_ALPHA8_SNORM:
723 case GL_LUMINANCE16_ALPHA16_SNORM:
724 case GL_INTENSITY_SNORM:
725 case GL_INTENSITY8_SNORM:
726 case GL_INTENSITY16_SNORM:
727 return GL_TRUE;
728 default:
729 return GL_FALSE;
730 }
731 }
732
733 /**
734 * Test if the given format is an integer (non-normalized) format.
735 */
736 GLboolean
737 _mesa_is_enum_format_unsigned_int(GLenum format)
738 {
739 switch (format) {
740 /* specific integer formats */
741 case GL_RGBA32UI_EXT:
742 case GL_RGB32UI_EXT:
743 case GL_RG32UI:
744 case GL_R32UI:
745 case GL_ALPHA32UI_EXT:
746 case GL_INTENSITY32UI_EXT:
747 case GL_LUMINANCE32UI_EXT:
748 case GL_LUMINANCE_ALPHA32UI_EXT:
749 case GL_RGBA16UI_EXT:
750 case GL_RGB16UI_EXT:
751 case GL_RG16UI:
752 case GL_R16UI:
753 case GL_ALPHA16UI_EXT:
754 case GL_INTENSITY16UI_EXT:
755 case GL_LUMINANCE16UI_EXT:
756 case GL_LUMINANCE_ALPHA16UI_EXT:
757 case GL_RGBA8UI_EXT:
758 case GL_RGB8UI_EXT:
759 case GL_RG8UI:
760 case GL_R8UI:
761 case GL_ALPHA8UI_EXT:
762 case GL_INTENSITY8UI_EXT:
763 case GL_LUMINANCE8UI_EXT:
764 case GL_LUMINANCE_ALPHA8UI_EXT:
765 case GL_RGB10_A2UI:
766 return GL_TRUE;
767 default:
768 return GL_FALSE;
769 }
770 }
771
772
773 /**
774 * Test if the given format is an integer (non-normalized) format.
775 */
776 GLboolean
777 _mesa_is_enum_format_signed_int(GLenum format)
778 {
779 switch (format) {
780 /* generic integer formats */
781 case GL_RED_INTEGER_EXT:
782 case GL_GREEN_INTEGER_EXT:
783 case GL_BLUE_INTEGER_EXT:
784 case GL_ALPHA_INTEGER_EXT:
785 case GL_RGB_INTEGER_EXT:
786 case GL_RGBA_INTEGER_EXT:
787 case GL_BGR_INTEGER_EXT:
788 case GL_BGRA_INTEGER_EXT:
789 case GL_LUMINANCE_INTEGER_EXT:
790 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
791 case GL_RG_INTEGER:
792 /* specific integer formats */
793 case GL_RGBA32I_EXT:
794 case GL_RGB32I_EXT:
795 case GL_RG32I:
796 case GL_R32I:
797 case GL_ALPHA32I_EXT:
798 case GL_INTENSITY32I_EXT:
799 case GL_LUMINANCE32I_EXT:
800 case GL_LUMINANCE_ALPHA32I_EXT:
801 case GL_RGBA16I_EXT:
802 case GL_RGB16I_EXT:
803 case GL_RG16I:
804 case GL_R16I:
805 case GL_ALPHA16I_EXT:
806 case GL_INTENSITY16I_EXT:
807 case GL_LUMINANCE16I_EXT:
808 case GL_LUMINANCE_ALPHA16I_EXT:
809 case GL_RGBA8I_EXT:
810 case GL_RGB8I_EXT:
811 case GL_RG8I:
812 case GL_R8I:
813 case GL_ALPHA8I_EXT:
814 case GL_INTENSITY8I_EXT:
815 case GL_LUMINANCE8I_EXT:
816 case GL_LUMINANCE_ALPHA8I_EXT:
817 return GL_TRUE;
818 default:
819 return GL_FALSE;
820 }
821 }
822
823 /**
824 * Test if the given format is an ASTC format.
825 */
826 GLboolean
827 _mesa_is_astc_format(GLenum internalFormat)
828 {
829 switch (internalFormat) {
830 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
831 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
832 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
833 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
834 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
835 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
844 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
845 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
846 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
847 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
848 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
858 return true;
859 default:
860 return false;
861 }
862 }
863
864
865 /**
866 * Test if the given format is an integer (non-normalized) format.
867 */
868 GLboolean
869 _mesa_is_enum_format_integer(GLenum format)
870 {
871 return _mesa_is_enum_format_unsigned_int(format) ||
872 _mesa_is_enum_format_signed_int(format);
873 }
874
875
876 GLboolean
877 _mesa_is_type_unsigned(GLenum type)
878 {
879 switch (type) {
880 case GL_UNSIGNED_INT:
881 case GL_UNSIGNED_INT_8_8_8_8:
882 case GL_UNSIGNED_INT_8_8_8_8_REV:
883 case GL_UNSIGNED_INT_10_10_10_2:
884 case GL_UNSIGNED_INT_2_10_10_10_REV:
885
886 case GL_UNSIGNED_SHORT:
887 case GL_UNSIGNED_SHORT_4_4_4_4:
888 case GL_UNSIGNED_SHORT_5_5_5_1:
889 case GL_UNSIGNED_SHORT_5_6_5:
890 case GL_UNSIGNED_SHORT_5_6_5_REV:
891 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
892 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
893 case GL_UNSIGNED_SHORT_8_8_MESA:
894 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
895
896 case GL_UNSIGNED_BYTE:
897 case GL_UNSIGNED_BYTE_3_3_2:
898 case GL_UNSIGNED_BYTE_2_3_3_REV:
899 return GL_TRUE;
900
901 default:
902 return GL_FALSE;
903 }
904 }
905
906
907 /**
908 * Test if the given image format is a color/RGBA format (i.e., not color
909 * index, depth, stencil, etc).
910 * \param format the image format value (may by an internal texture format)
911 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
912 */
913 GLboolean
914 _mesa_is_color_format(GLenum format)
915 {
916 switch (format) {
917 case GL_RED:
918 case GL_GREEN:
919 case GL_BLUE:
920 case GL_ALPHA:
921 case GL_ALPHA4:
922 case GL_ALPHA8:
923 case GL_ALPHA12:
924 case GL_ALPHA16:
925 case 1:
926 case GL_LUMINANCE:
927 case GL_LUMINANCE4:
928 case GL_LUMINANCE8:
929 case GL_LUMINANCE12:
930 case GL_LUMINANCE16:
931 case 2:
932 case GL_LUMINANCE_ALPHA:
933 case GL_LUMINANCE4_ALPHA4:
934 case GL_LUMINANCE6_ALPHA2:
935 case GL_LUMINANCE8_ALPHA8:
936 case GL_LUMINANCE12_ALPHA4:
937 case GL_LUMINANCE12_ALPHA12:
938 case GL_LUMINANCE16_ALPHA16:
939 case GL_INTENSITY:
940 case GL_INTENSITY4:
941 case GL_INTENSITY8:
942 case GL_INTENSITY12:
943 case GL_INTENSITY16:
944 case GL_R8:
945 case GL_R16:
946 case GL_RG:
947 case GL_RG8:
948 case GL_RG16:
949 case 3:
950 case GL_RGB:
951 case GL_BGR:
952 case GL_R3_G3_B2:
953 case GL_RGB4:
954 case GL_RGB5:
955 case GL_RGB565:
956 case GL_RGB8:
957 case GL_RGB10:
958 case GL_RGB12:
959 case GL_RGB16:
960 case 4:
961 case GL_ABGR_EXT:
962 case GL_RGBA:
963 case GL_BGRA:
964 case GL_RGBA2:
965 case GL_RGBA4:
966 case GL_RGB5_A1:
967 case GL_RGBA8:
968 case GL_RGB10_A2:
969 case GL_RGBA12:
970 case GL_RGBA16:
971 /* float texture formats */
972 case GL_ALPHA16F_ARB:
973 case GL_ALPHA32F_ARB:
974 case GL_LUMINANCE16F_ARB:
975 case GL_LUMINANCE32F_ARB:
976 case GL_LUMINANCE_ALPHA16F_ARB:
977 case GL_LUMINANCE_ALPHA32F_ARB:
978 case GL_INTENSITY16F_ARB:
979 case GL_INTENSITY32F_ARB:
980 case GL_R16F:
981 case GL_R32F:
982 case GL_RG16F:
983 case GL_RG32F:
984 case GL_RGB16F_ARB:
985 case GL_RGB32F_ARB:
986 case GL_RGBA16F_ARB:
987 case GL_RGBA32F_ARB:
988 /* compressed formats */
989 case GL_COMPRESSED_ALPHA:
990 case GL_COMPRESSED_LUMINANCE:
991 case GL_COMPRESSED_LUMINANCE_ALPHA:
992 case GL_COMPRESSED_INTENSITY:
993 case GL_COMPRESSED_RED:
994 case GL_COMPRESSED_RG:
995 case GL_COMPRESSED_RGB:
996 case GL_COMPRESSED_RGBA:
997 case GL_RGB_S3TC:
998 case GL_RGB4_S3TC:
999 case GL_RGBA_S3TC:
1000 case GL_RGBA4_S3TC:
1001 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1002 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1003 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1004 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1005 case GL_COMPRESSED_RGB_FXT1_3DFX:
1006 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1007 case GL_SRGB_EXT:
1008 case GL_SRGB8_EXT:
1009 case GL_SRGB_ALPHA_EXT:
1010 case GL_SRGB8_ALPHA8_EXT:
1011 case GL_SLUMINANCE_ALPHA_EXT:
1012 case GL_SLUMINANCE8_ALPHA8_EXT:
1013 case GL_SLUMINANCE_EXT:
1014 case GL_SLUMINANCE8_EXT:
1015 case GL_COMPRESSED_SRGB_EXT:
1016 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1017 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1018 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1019 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1020 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1021 case GL_COMPRESSED_SLUMINANCE_EXT:
1022 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1023 case GL_COMPRESSED_RED_RGTC1:
1024 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1025 case GL_COMPRESSED_RG_RGTC2:
1026 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1027 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1028 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1029 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1030 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1031 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1032 case GL_ETC1_RGB8_OES:
1033 case GL_COMPRESSED_RGB8_ETC2:
1034 case GL_COMPRESSED_SRGB8_ETC2:
1035 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1036 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1037 case GL_COMPRESSED_R11_EAC:
1038 case GL_COMPRESSED_RG11_EAC:
1039 case GL_COMPRESSED_SIGNED_R11_EAC:
1040 case GL_COMPRESSED_SIGNED_RG11_EAC:
1041 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1042 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1043 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1044 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1045 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1046 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1047 /* generic integer formats */
1048 case GL_RED_INTEGER_EXT:
1049 case GL_GREEN_INTEGER_EXT:
1050 case GL_BLUE_INTEGER_EXT:
1051 case GL_ALPHA_INTEGER_EXT:
1052 case GL_RGB_INTEGER_EXT:
1053 case GL_RGBA_INTEGER_EXT:
1054 case GL_BGR_INTEGER_EXT:
1055 case GL_BGRA_INTEGER_EXT:
1056 case GL_RG_INTEGER:
1057 case GL_LUMINANCE_INTEGER_EXT:
1058 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1059 /* sized integer formats */
1060 case GL_RGBA32UI_EXT:
1061 case GL_RGB32UI_EXT:
1062 case GL_RG32UI:
1063 case GL_R32UI:
1064 case GL_ALPHA32UI_EXT:
1065 case GL_INTENSITY32UI_EXT:
1066 case GL_LUMINANCE32UI_EXT:
1067 case GL_LUMINANCE_ALPHA32UI_EXT:
1068 case GL_RGBA16UI_EXT:
1069 case GL_RGB16UI_EXT:
1070 case GL_RG16UI:
1071 case GL_R16UI:
1072 case GL_ALPHA16UI_EXT:
1073 case GL_INTENSITY16UI_EXT:
1074 case GL_LUMINANCE16UI_EXT:
1075 case GL_LUMINANCE_ALPHA16UI_EXT:
1076 case GL_RGBA8UI_EXT:
1077 case GL_RGB8UI_EXT:
1078 case GL_RG8UI:
1079 case GL_R8UI:
1080 case GL_ALPHA8UI_EXT:
1081 case GL_INTENSITY8UI_EXT:
1082 case GL_LUMINANCE8UI_EXT:
1083 case GL_LUMINANCE_ALPHA8UI_EXT:
1084 case GL_RGBA32I_EXT:
1085 case GL_RGB32I_EXT:
1086 case GL_RG32I:
1087 case GL_R32I:
1088 case GL_ALPHA32I_EXT:
1089 case GL_INTENSITY32I_EXT:
1090 case GL_LUMINANCE32I_EXT:
1091 case GL_LUMINANCE_ALPHA32I_EXT:
1092 case GL_RGBA16I_EXT:
1093 case GL_RGB16I_EXT:
1094 case GL_RG16I:
1095 case GL_R16I:
1096 case GL_ALPHA16I_EXT:
1097 case GL_INTENSITY16I_EXT:
1098 case GL_LUMINANCE16I_EXT:
1099 case GL_LUMINANCE_ALPHA16I_EXT:
1100 case GL_RGBA8I_EXT:
1101 case GL_RGB8I_EXT:
1102 case GL_RG8I:
1103 case GL_R8I:
1104 case GL_ALPHA8I_EXT:
1105 case GL_INTENSITY8I_EXT:
1106 case GL_LUMINANCE8I_EXT:
1107 case GL_LUMINANCE_ALPHA8I_EXT:
1108 /* signed, normalized texture formats */
1109 case GL_RED_SNORM:
1110 case GL_R8_SNORM:
1111 case GL_R16_SNORM:
1112 case GL_RG_SNORM:
1113 case GL_RG8_SNORM:
1114 case GL_RG16_SNORM:
1115 case GL_RGB_SNORM:
1116 case GL_RGB8_SNORM:
1117 case GL_RGB16_SNORM:
1118 case GL_RGBA_SNORM:
1119 case GL_RGBA8_SNORM:
1120 case GL_RGBA16_SNORM:
1121 case GL_ALPHA_SNORM:
1122 case GL_ALPHA8_SNORM:
1123 case GL_ALPHA16_SNORM:
1124 case GL_LUMINANCE_SNORM:
1125 case GL_LUMINANCE8_SNORM:
1126 case GL_LUMINANCE16_SNORM:
1127 case GL_LUMINANCE_ALPHA_SNORM:
1128 case GL_LUMINANCE8_ALPHA8_SNORM:
1129 case GL_LUMINANCE16_ALPHA16_SNORM:
1130 case GL_INTENSITY_SNORM:
1131 case GL_INTENSITY8_SNORM:
1132 case GL_INTENSITY16_SNORM:
1133 case GL_RGB9_E5:
1134 case GL_R11F_G11F_B10F:
1135 case GL_RGB10_A2UI:
1136 return GL_TRUE;
1137 case GL_YCBCR_MESA: /* not considered to be RGB */
1138 /* fall-through */
1139 default:
1140 return GL_FALSE;
1141 }
1142 }
1143
1144
1145 /**
1146 * Test if the given image format is a depth component format.
1147 */
1148 GLboolean
1149 _mesa_is_depth_format(GLenum format)
1150 {
1151 switch (format) {
1152 case GL_DEPTH_COMPONENT:
1153 case GL_DEPTH_COMPONENT16:
1154 case GL_DEPTH_COMPONENT24:
1155 case GL_DEPTH_COMPONENT32:
1156 case GL_DEPTH_COMPONENT32F:
1157 return GL_TRUE;
1158 default:
1159 return GL_FALSE;
1160 }
1161 }
1162
1163
1164 /**
1165 * Test if the given image format is a stencil format.
1166 */
1167 GLboolean
1168 _mesa_is_stencil_format(GLenum format)
1169 {
1170 switch (format) {
1171 case GL_STENCIL_INDEX:
1172 return GL_TRUE;
1173 default:
1174 return GL_FALSE;
1175 }
1176 }
1177
1178
1179 /**
1180 * Test if the given image format is a YCbCr format.
1181 */
1182 GLboolean
1183 _mesa_is_ycbcr_format(GLenum format)
1184 {
1185 switch (format) {
1186 case GL_YCBCR_MESA:
1187 return GL_TRUE;
1188 default:
1189 return GL_FALSE;
1190 }
1191 }
1192
1193
1194 /**
1195 * Test if the given image format is a depth+stencil format.
1196 */
1197 GLboolean
1198 _mesa_is_depthstencil_format(GLenum format)
1199 {
1200 switch (format) {
1201 case GL_DEPTH24_STENCIL8_EXT:
1202 case GL_DEPTH_STENCIL_EXT:
1203 case GL_DEPTH32F_STENCIL8:
1204 return GL_TRUE;
1205 default:
1206 return GL_FALSE;
1207 }
1208 }
1209
1210
1211 /**
1212 * Test if the given image format is a depth or stencil format.
1213 */
1214 GLboolean
1215 _mesa_is_depth_or_stencil_format(GLenum format)
1216 {
1217 switch (format) {
1218 case GL_DEPTH_COMPONENT:
1219 case GL_DEPTH_COMPONENT16:
1220 case GL_DEPTH_COMPONENT24:
1221 case GL_DEPTH_COMPONENT32:
1222 case GL_STENCIL_INDEX:
1223 case GL_STENCIL_INDEX1_EXT:
1224 case GL_STENCIL_INDEX4_EXT:
1225 case GL_STENCIL_INDEX8_EXT:
1226 case GL_STENCIL_INDEX16_EXT:
1227 case GL_DEPTH_STENCIL_EXT:
1228 case GL_DEPTH24_STENCIL8_EXT:
1229 case GL_DEPTH_COMPONENT32F:
1230 case GL_DEPTH32F_STENCIL8:
1231 return GL_TRUE;
1232 default:
1233 return GL_FALSE;
1234 }
1235 }
1236
1237
1238 /**
1239 * Test if an image format is a supported compressed format.
1240 * \param format the internal format token provided by the user.
1241 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1242 */
1243 GLboolean
1244 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1245 {
1246 switch (format) {
1247 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1248 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1249 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1250 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1251 /* Assume that the ANGLE flag will always be set if the EXT flag is set.
1252 */
1253 return ctx->Extensions.ANGLE_texture_compression_dxt;
1254 case GL_RGB_S3TC:
1255 case GL_RGB4_S3TC:
1256 case GL_RGBA_S3TC:
1257 case GL_RGBA4_S3TC:
1258 return _mesa_is_desktop_gl(ctx) &&
1259 ctx->Extensions.ANGLE_texture_compression_dxt;
1260 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1261 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1262 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1263 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1264 return _mesa_is_desktop_gl(ctx)
1265 && ctx->Extensions.EXT_texture_sRGB
1266 && ctx->Extensions.EXT_texture_compression_s3tc;
1267 case GL_COMPRESSED_RGB_FXT1_3DFX:
1268 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1269 return _mesa_is_desktop_gl(ctx)
1270 && ctx->Extensions.TDFX_texture_compression_FXT1;
1271 case GL_COMPRESSED_RED_RGTC1:
1272 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1273 case GL_COMPRESSED_RG_RGTC2:
1274 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1275 return _mesa_is_desktop_gl(ctx)
1276 && ctx->Extensions.ARB_texture_compression_rgtc;
1277 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1278 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1279 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1280 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1281 return ctx->API == API_OPENGL_COMPAT
1282 && ctx->Extensions.EXT_texture_compression_latc;
1283 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1284 return ctx->API == API_OPENGL_COMPAT
1285 && ctx->Extensions.ATI_texture_compression_3dc;
1286 case GL_ETC1_RGB8_OES:
1287 return _mesa_is_gles(ctx)
1288 && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
1289 case GL_COMPRESSED_RGB8_ETC2:
1290 case GL_COMPRESSED_SRGB8_ETC2:
1291 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1292 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1293 case GL_COMPRESSED_R11_EAC:
1294 case GL_COMPRESSED_RG11_EAC:
1295 case GL_COMPRESSED_SIGNED_R11_EAC:
1296 case GL_COMPRESSED_SIGNED_RG11_EAC:
1297 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1298 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1299 return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
1300 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1301 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1302 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1303 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1304 return _mesa_is_desktop_gl(ctx) &&
1305 ctx->Extensions.ARB_texture_compression_bptc;
1306 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1307 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1308 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1309 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1310 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1311 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1312 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1313 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1314 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1315 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1316 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1317 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1318 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1319 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1320 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1321 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1322 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1323 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1324 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1325 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1326 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1327 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1328 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1329 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1330 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1331 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1332 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1333 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1334 return ctx->Extensions.KHR_texture_compression_astc_ldr;
1335 case GL_PALETTE4_RGB8_OES:
1336 case GL_PALETTE4_RGBA8_OES:
1337 case GL_PALETTE4_R5_G6_B5_OES:
1338 case GL_PALETTE4_RGBA4_OES:
1339 case GL_PALETTE4_RGB5_A1_OES:
1340 case GL_PALETTE8_RGB8_OES:
1341 case GL_PALETTE8_RGBA8_OES:
1342 case GL_PALETTE8_R5_G6_B5_OES:
1343 case GL_PALETTE8_RGBA4_OES:
1344 case GL_PALETTE8_RGB5_A1_OES:
1345 return ctx->API == API_OPENGLES;
1346 default:
1347 return GL_FALSE;
1348 }
1349 }
1350
1351 /**
1352 * Convert various unpack formats to the corresponding base format.
1353 */
1354 GLenum
1355 _mesa_unpack_format_to_base_format(GLenum format)
1356 {
1357 switch(format) {
1358 case GL_RED_INTEGER:
1359 return GL_RED;
1360 case GL_GREEN_INTEGER:
1361 return GL_GREEN;
1362 case GL_BLUE_INTEGER:
1363 return GL_BLUE;
1364 case GL_ALPHA_INTEGER:
1365 return GL_ALPHA;
1366 case GL_RG_INTEGER:
1367 return GL_RG;
1368 case GL_RGB_INTEGER:
1369 return GL_RGB;
1370 case GL_RGBA_INTEGER:
1371 return GL_RGBA;
1372 case GL_BGR_INTEGER:
1373 return GL_BGR;
1374 case GL_BGRA_INTEGER:
1375 return GL_BGRA;
1376 case GL_LUMINANCE_INTEGER_EXT:
1377 return GL_LUMINANCE;
1378 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1379 return GL_LUMINANCE_ALPHA;
1380 case GL_RED:
1381 case GL_GREEN:
1382 case GL_BLUE:
1383 case GL_RG:
1384 case GL_RGB:
1385 case GL_RGBA:
1386 case GL_BGR:
1387 case GL_BGRA:
1388 case GL_ALPHA:
1389 case GL_LUMINANCE:
1390 case GL_LUMINANCE_ALPHA:
1391 default:
1392 return format;
1393 }
1394 }
1395
1396 /**
1397 * Convert various base formats to the corresponding integer format.
1398 */
1399 GLenum
1400 _mesa_base_format_to_integer_format(GLenum format)
1401 {
1402 switch(format) {
1403 case GL_RED:
1404 return GL_RED_INTEGER;
1405 case GL_GREEN:
1406 return GL_GREEN_INTEGER;
1407 case GL_BLUE:
1408 return GL_BLUE_INTEGER;
1409 case GL_RG:
1410 return GL_RG_INTEGER;
1411 case GL_RGB:
1412 return GL_RGB_INTEGER;
1413 case GL_RGBA:
1414 return GL_RGBA_INTEGER;
1415 case GL_BGR:
1416 return GL_BGR_INTEGER;
1417 case GL_BGRA:
1418 return GL_BGRA_INTEGER;
1419 case GL_ALPHA:
1420 return GL_ALPHA_INTEGER;
1421 case GL_LUMINANCE:
1422 return GL_LUMINANCE_INTEGER_EXT;
1423 case GL_LUMINANCE_ALPHA:
1424 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1425 }
1426
1427 return format;
1428 }
1429
1430
1431 /**
1432 * Does the given base texture/renderbuffer format have the channel
1433 * named by 'pname'?
1434 */
1435 GLboolean
1436 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1437 {
1438 switch (pname) {
1439 case GL_TEXTURE_RED_SIZE:
1440 case GL_TEXTURE_RED_TYPE:
1441 case GL_RENDERBUFFER_RED_SIZE_EXT:
1442 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1443 if (base_format == GL_RED ||
1444 base_format == GL_RG ||
1445 base_format == GL_RGB ||
1446 base_format == GL_RGBA) {
1447 return GL_TRUE;
1448 }
1449 return GL_FALSE;
1450 case GL_TEXTURE_GREEN_SIZE:
1451 case GL_TEXTURE_GREEN_TYPE:
1452 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1453 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1454 if (base_format == GL_RG ||
1455 base_format == GL_RGB ||
1456 base_format == GL_RGBA) {
1457 return GL_TRUE;
1458 }
1459 return GL_FALSE;
1460 case GL_TEXTURE_BLUE_SIZE:
1461 case GL_TEXTURE_BLUE_TYPE:
1462 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1463 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1464 if (base_format == GL_RGB ||
1465 base_format == GL_RGBA) {
1466 return GL_TRUE;
1467 }
1468 return GL_FALSE;
1469 case GL_TEXTURE_ALPHA_SIZE:
1470 case GL_TEXTURE_ALPHA_TYPE:
1471 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1472 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1473 if (base_format == GL_RGBA ||
1474 base_format == GL_ALPHA ||
1475 base_format == GL_LUMINANCE_ALPHA) {
1476 return GL_TRUE;
1477 }
1478 return GL_FALSE;
1479 case GL_TEXTURE_LUMINANCE_SIZE:
1480 case GL_TEXTURE_LUMINANCE_TYPE:
1481 if (base_format == GL_LUMINANCE ||
1482 base_format == GL_LUMINANCE_ALPHA) {
1483 return GL_TRUE;
1484 }
1485 return GL_FALSE;
1486 case GL_TEXTURE_INTENSITY_SIZE:
1487 case GL_TEXTURE_INTENSITY_TYPE:
1488 if (base_format == GL_INTENSITY) {
1489 return GL_TRUE;
1490 }
1491 return GL_FALSE;
1492 case GL_TEXTURE_DEPTH_SIZE:
1493 case GL_TEXTURE_DEPTH_TYPE:
1494 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1495 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1496 if (base_format == GL_DEPTH_STENCIL ||
1497 base_format == GL_DEPTH_COMPONENT) {
1498 return GL_TRUE;
1499 }
1500 return GL_FALSE;
1501 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1502 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1503 if (base_format == GL_DEPTH_STENCIL ||
1504 base_format == GL_STENCIL_INDEX) {
1505 return GL_TRUE;
1506 }
1507 return GL_FALSE;
1508 default:
1509 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1510 __func__, pname);
1511 return GL_FALSE;
1512 }
1513
1514 return GL_FALSE;
1515 }
1516
1517
1518 /**
1519 * Returns the number of channels/components for a base format.
1520 */
1521 GLint
1522 _mesa_base_format_component_count(GLenum base_format)
1523 {
1524 switch (base_format) {
1525 case GL_RED:
1526 case GL_ALPHA:
1527 case GL_INTENSITY:
1528 case GL_DEPTH_COMPONENT:
1529 return 1;
1530 case GL_RG:
1531 case GL_LUMINANCE_ALPHA:
1532 case GL_DEPTH_STENCIL:
1533 return 2;
1534 case GL_RGB:
1535 return 3;
1536 case GL_RGBA:
1537 return 4;
1538 default:
1539 return -1;
1540 }
1541 }
1542
1543
1544 /**
1545 * If format is a generic compressed format, return the corresponding
1546 * non-compressed format. For other formats, return the format as-is.
1547 */
1548 GLenum
1549 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1550 {
1551 switch (format) {
1552 case GL_COMPRESSED_RED:
1553 return GL_RED;
1554 case GL_COMPRESSED_RG:
1555 return GL_RG;
1556 case GL_COMPRESSED_RGB:
1557 return GL_RGB;
1558 case GL_COMPRESSED_RGBA:
1559 return GL_RGBA;
1560 case GL_COMPRESSED_ALPHA:
1561 return GL_ALPHA;
1562 case GL_COMPRESSED_LUMINANCE:
1563 return GL_LUMINANCE;
1564 case GL_COMPRESSED_LUMINANCE_ALPHA:
1565 return GL_LUMINANCE_ALPHA;
1566 case GL_COMPRESSED_INTENSITY:
1567 return GL_INTENSITY;
1568 /* sRGB formats */
1569 case GL_COMPRESSED_SRGB:
1570 return GL_SRGB;
1571 case GL_COMPRESSED_SRGB_ALPHA:
1572 return GL_SRGB_ALPHA;
1573 case GL_COMPRESSED_SLUMINANCE:
1574 return GL_SLUMINANCE;
1575 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1576 return GL_SLUMINANCE_ALPHA;
1577 default:
1578 return format;
1579 }
1580 }
1581
1582
1583 /**
1584 * Return the equivalent non-generic internal format.
1585 * This is useful for comparing whether two internal formats are equivalent.
1586 */
1587 GLenum
1588 _mesa_get_nongeneric_internalformat(GLenum format)
1589 {
1590 switch (format) {
1591 /* GL 1.1 formats. */
1592 case 4:
1593 case GL_RGBA:
1594 return GL_RGBA8;
1595 case 3:
1596 case GL_RGB:
1597 return GL_RGB8;
1598 case 2:
1599 case GL_LUMINANCE_ALPHA:
1600 return GL_LUMINANCE8_ALPHA8;
1601 case 1:
1602 case GL_LUMINANCE:
1603 return GL_LUMINANCE8;
1604 case GL_ALPHA:
1605 return GL_ALPHA8;
1606 case GL_INTENSITY:
1607 return GL_INTENSITY8;
1608
1609 /* GL_ARB_texture_rg */
1610 case GL_RED:
1611 return GL_R8;
1612 case GL_RG:
1613 return GL_RG8;
1614
1615 /* GL_EXT_texture_sRGB */
1616 case GL_SRGB:
1617 return GL_SRGB8;
1618 case GL_SRGB_ALPHA:
1619 return GL_SRGB8_ALPHA8;
1620 case GL_SLUMINANCE:
1621 return GL_SLUMINANCE8;
1622 case GL_SLUMINANCE_ALPHA:
1623 return GL_SLUMINANCE8_ALPHA8;
1624
1625 /* GL_EXT_texture_snorm */
1626 case GL_RGBA_SNORM:
1627 return GL_RGBA8_SNORM;
1628 case GL_RGB_SNORM:
1629 return GL_RGB8_SNORM;
1630 case GL_RG_SNORM:
1631 return GL_RG8_SNORM;
1632 case GL_RED_SNORM:
1633 return GL_R8_SNORM;
1634 case GL_LUMINANCE_ALPHA_SNORM:
1635 return GL_LUMINANCE8_ALPHA8_SNORM;
1636 case GL_LUMINANCE_SNORM:
1637 return GL_LUMINANCE8_SNORM;
1638 case GL_ALPHA_SNORM:
1639 return GL_ALPHA8_SNORM;
1640 case GL_INTENSITY_SNORM:
1641 return GL_INTENSITY8_SNORM;
1642
1643 default:
1644 return format;
1645 }
1646 }
1647
1648
1649 /**
1650 * Convert an sRGB internal format to linear.
1651 */
1652 GLenum
1653 _mesa_get_linear_internalformat(GLenum format)
1654 {
1655 switch (format) {
1656 case GL_SRGB:
1657 return GL_RGB;
1658 case GL_SRGB_ALPHA:
1659 return GL_RGBA;
1660 case GL_SRGB8:
1661 return GL_RGB8;
1662 case GL_SRGB8_ALPHA8:
1663 return GL_RGBA8;
1664 case GL_SLUMINANCE8:
1665 return GL_LUMINANCE8;
1666 case GL_SLUMINANCE:
1667 return GL_LUMINANCE;
1668 case GL_SLUMINANCE_ALPHA:
1669 return GL_LUMINANCE_ALPHA;
1670 case GL_SLUMINANCE8_ALPHA8:
1671 return GL_LUMINANCE8_ALPHA8;
1672 default:
1673 return format;
1674 }
1675 }
1676
1677
1678 /**
1679 * Do error checking of format/type combinations for glReadPixels,
1680 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1681 * and type values, we may either generate GL_INVALID_OPERATION or
1682 * GL_INVALID_ENUM.
1683 *
1684 * \param format pixel format.
1685 * \param type pixel type.
1686 *
1687 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1688 */
1689 GLenum
1690 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1691 GLenum format, GLenum type)
1692 {
1693 /* From OpenGL 3.3 spec, page 220:
1694 * "If the format is DEPTH_STENCIL, then values are taken from
1695 * both the depth buffer and the stencil buffer. If there is no
1696 * depth buffer or if there is no stencil buffer, then the error
1697 * INVALID_OPERATION occurs. If the type parameter is not
1698 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1699 * error INVALID_ENUM occurs."
1700 *
1701 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1702 * cannot be used to read depth or stencil in that API.
1703 */
1704 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1705 && type != GL_UNSIGNED_INT_24_8
1706 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1707 return GL_INVALID_ENUM;
1708
1709 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1710 switch (type) {
1711 case GL_BITMAP:
1712 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1713 return GL_INVALID_ENUM;
1714 }
1715 break;
1716
1717 case GL_UNSIGNED_BYTE_3_3_2:
1718 case GL_UNSIGNED_BYTE_2_3_3_REV:
1719 case GL_UNSIGNED_SHORT_5_6_5:
1720 case GL_UNSIGNED_SHORT_5_6_5_REV:
1721 if (format == GL_RGB) {
1722 break; /* OK */
1723 }
1724 if (format == GL_RGB_INTEGER_EXT &&
1725 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1726 break; /* OK */
1727 }
1728 return GL_INVALID_OPERATION;
1729
1730 case GL_UNSIGNED_SHORT_4_4_4_4:
1731 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1732 case GL_UNSIGNED_INT_8_8_8_8:
1733 case GL_UNSIGNED_INT_8_8_8_8_REV:
1734 if (format == GL_RGBA ||
1735 format == GL_BGRA ||
1736 format == GL_ABGR_EXT) {
1737 break; /* OK */
1738 }
1739 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1740 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1741 break; /* OK */
1742 }
1743 return GL_INVALID_OPERATION;
1744
1745 case GL_UNSIGNED_SHORT_5_5_5_1:
1746 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1747 case GL_UNSIGNED_INT_10_10_10_2:
1748 case GL_UNSIGNED_INT_2_10_10_10_REV:
1749 if (format == GL_RGBA ||
1750 format == GL_BGRA) {
1751 break; /* OK */
1752 }
1753 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1754 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1755 break; /* OK */
1756 }
1757 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1758 ctx->API == API_OPENGLES2) {
1759 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1760 }
1761 return GL_INVALID_OPERATION;
1762
1763 case GL_UNSIGNED_INT_24_8:
1764 if (format != GL_DEPTH_STENCIL) {
1765 return GL_INVALID_OPERATION;
1766 }
1767 return GL_NO_ERROR;
1768
1769 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1770 if (!ctx->Extensions.ARB_depth_buffer_float) {
1771 return GL_INVALID_ENUM;
1772 }
1773 if (format != GL_DEPTH_STENCIL) {
1774 return GL_INVALID_OPERATION;
1775 }
1776 return GL_NO_ERROR;
1777
1778 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1779 if (!ctx->Extensions.EXT_packed_float) {
1780 return GL_INVALID_ENUM;
1781 }
1782 if (format != GL_RGB) {
1783 return GL_INVALID_OPERATION;
1784 }
1785 return GL_NO_ERROR;
1786
1787 case GL_HALF_FLOAT_OES:
1788 switch (format) {
1789 case GL_RGBA:
1790 case GL_RGB:
1791 case GL_LUMINANCE_ALPHA:
1792 case GL_LUMINANCE:
1793 case GL_ALPHA:
1794 return GL_NO_ERROR;
1795 case GL_RG:
1796 case GL_RED:
1797 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1798 return GL_NO_ERROR;
1799 default:
1800 return GL_INVALID_OPERATION;
1801 }
1802
1803 default:
1804 ; /* fall-through */
1805 }
1806
1807 /* now, for each format, check the type for compatibility */
1808 switch (format) {
1809 case GL_COLOR_INDEX:
1810 case GL_STENCIL_INDEX:
1811 switch (type) {
1812 case GL_BITMAP:
1813 case GL_BYTE:
1814 case GL_UNSIGNED_BYTE:
1815 case GL_SHORT:
1816 case GL_UNSIGNED_SHORT:
1817 case GL_INT:
1818 case GL_UNSIGNED_INT:
1819 case GL_FLOAT:
1820 case GL_HALF_FLOAT:
1821 return GL_NO_ERROR;
1822 default:
1823 return GL_INVALID_ENUM;
1824 }
1825
1826 case GL_RED:
1827 case GL_GREEN:
1828 case GL_BLUE:
1829 case GL_ALPHA:
1830 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1831 case GL_INTENSITY:
1832 #endif
1833 case GL_LUMINANCE:
1834 case GL_LUMINANCE_ALPHA:
1835 case GL_DEPTH_COMPONENT:
1836 switch (type) {
1837 case GL_BYTE:
1838 case GL_UNSIGNED_BYTE:
1839 case GL_SHORT:
1840 case GL_UNSIGNED_SHORT:
1841 case GL_INT:
1842 case GL_UNSIGNED_INT:
1843 case GL_FLOAT:
1844 case GL_HALF_FLOAT:
1845 return GL_NO_ERROR;
1846 default:
1847 return GL_INVALID_ENUM;
1848 }
1849
1850 case GL_RG:
1851 if (!ctx->Extensions.ARB_texture_rg)
1852 return GL_INVALID_ENUM;
1853 switch (type) {
1854 case GL_BYTE:
1855 case GL_UNSIGNED_BYTE:
1856 case GL_SHORT:
1857 case GL_UNSIGNED_SHORT:
1858 case GL_INT:
1859 case GL_UNSIGNED_INT:
1860 case GL_FLOAT:
1861 case GL_HALF_FLOAT:
1862 return GL_NO_ERROR;
1863 default:
1864 return GL_INVALID_ENUM;
1865 }
1866
1867 case GL_RGB:
1868 switch (type) {
1869 case GL_BYTE:
1870 case GL_UNSIGNED_BYTE:
1871 case GL_SHORT:
1872 case GL_UNSIGNED_SHORT:
1873 case GL_INT:
1874 case GL_UNSIGNED_INT:
1875 case GL_FLOAT:
1876 case GL_UNSIGNED_BYTE_3_3_2:
1877 case GL_UNSIGNED_BYTE_2_3_3_REV:
1878 case GL_UNSIGNED_SHORT_5_6_5:
1879 case GL_UNSIGNED_SHORT_5_6_5_REV:
1880 case GL_HALF_FLOAT:
1881 return GL_NO_ERROR;
1882 case GL_UNSIGNED_INT_2_10_10_10_REV:
1883 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1884 return (ctx->API == API_OPENGLES2)
1885 ? GL_NO_ERROR : GL_INVALID_ENUM;
1886 case GL_UNSIGNED_INT_5_9_9_9_REV:
1887 return ctx->Extensions.EXT_texture_shared_exponent
1888 ? GL_NO_ERROR : GL_INVALID_ENUM;
1889 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1890 return ctx->Extensions.EXT_packed_float
1891 ? GL_NO_ERROR : GL_INVALID_ENUM;
1892 default:
1893 return GL_INVALID_ENUM;
1894 }
1895
1896 case GL_BGR:
1897 switch (type) {
1898 /* NOTE: no packed types are supported with BGR. That's
1899 * intentional, according to the GL spec.
1900 */
1901 case GL_BYTE:
1902 case GL_UNSIGNED_BYTE:
1903 case GL_SHORT:
1904 case GL_UNSIGNED_SHORT:
1905 case GL_INT:
1906 case GL_UNSIGNED_INT:
1907 case GL_FLOAT:
1908 case GL_HALF_FLOAT:
1909 return GL_NO_ERROR;
1910 default:
1911 return GL_INVALID_ENUM;
1912 }
1913
1914 case GL_RGBA:
1915 case GL_BGRA:
1916 switch (type) {
1917 case GL_BYTE:
1918 case GL_UNSIGNED_BYTE:
1919 case GL_SHORT:
1920 case GL_UNSIGNED_SHORT:
1921 case GL_INT:
1922 case GL_UNSIGNED_INT:
1923 case GL_FLOAT:
1924 case GL_UNSIGNED_SHORT_4_4_4_4:
1925 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1926 case GL_UNSIGNED_SHORT_5_5_5_1:
1927 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1928 case GL_UNSIGNED_INT_8_8_8_8:
1929 case GL_UNSIGNED_INT_8_8_8_8_REV:
1930 case GL_UNSIGNED_INT_10_10_10_2:
1931 case GL_UNSIGNED_INT_2_10_10_10_REV:
1932 case GL_HALF_FLOAT:
1933 return GL_NO_ERROR;
1934 default:
1935 return GL_INVALID_ENUM;
1936 }
1937
1938 case GL_ABGR_EXT:
1939 switch (type) {
1940 case GL_BYTE:
1941 case GL_UNSIGNED_BYTE:
1942 case GL_SHORT:
1943 case GL_UNSIGNED_SHORT:
1944 case GL_INT:
1945 case GL_UNSIGNED_INT:
1946 case GL_FLOAT:
1947 case GL_UNSIGNED_SHORT_4_4_4_4:
1948 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1949 case GL_UNSIGNED_INT_8_8_8_8:
1950 case GL_UNSIGNED_INT_8_8_8_8_REV:
1951 case GL_HALF_FLOAT:
1952 return GL_NO_ERROR;
1953 default:
1954 return GL_INVALID_ENUM;
1955 }
1956
1957 case GL_YCBCR_MESA:
1958 if (!ctx->Extensions.MESA_ycbcr_texture)
1959 return GL_INVALID_ENUM;
1960 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
1961 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
1962 return GL_NO_ERROR;
1963 else
1964 return GL_INVALID_OPERATION;
1965
1966 case GL_DEPTH_STENCIL:
1967 if (type == GL_UNSIGNED_INT_24_8)
1968 return GL_NO_ERROR;
1969 else if (ctx->Extensions.ARB_depth_buffer_float &&
1970 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1971 return GL_NO_ERROR;
1972 else
1973 return GL_INVALID_ENUM;
1974
1975 /* integer-valued formats */
1976 case GL_RED_INTEGER_EXT:
1977 case GL_GREEN_INTEGER_EXT:
1978 case GL_BLUE_INTEGER_EXT:
1979 case GL_ALPHA_INTEGER_EXT:
1980 case GL_RG_INTEGER:
1981 switch (type) {
1982 case GL_BYTE:
1983 case GL_UNSIGNED_BYTE:
1984 case GL_SHORT:
1985 case GL_UNSIGNED_SHORT:
1986 case GL_INT:
1987 case GL_UNSIGNED_INT:
1988 return (ctx->Version >= 30 ||
1989 ctx->Extensions.EXT_texture_integer)
1990 ? GL_NO_ERROR : GL_INVALID_ENUM;
1991 default:
1992 return GL_INVALID_ENUM;
1993 }
1994
1995 case GL_RGB_INTEGER_EXT:
1996 switch (type) {
1997 case GL_BYTE:
1998 case GL_UNSIGNED_BYTE:
1999 case GL_SHORT:
2000 case GL_UNSIGNED_SHORT:
2001 case GL_INT:
2002 case GL_UNSIGNED_INT:
2003 return (ctx->Version >= 30 ||
2004 ctx->Extensions.EXT_texture_integer)
2005 ? GL_NO_ERROR : GL_INVALID_ENUM;
2006 case GL_UNSIGNED_BYTE_3_3_2:
2007 case GL_UNSIGNED_BYTE_2_3_3_REV:
2008 case GL_UNSIGNED_SHORT_5_6_5:
2009 case GL_UNSIGNED_SHORT_5_6_5_REV:
2010 return ctx->Extensions.ARB_texture_rgb10_a2ui
2011 ? GL_NO_ERROR : GL_INVALID_ENUM;
2012 default:
2013 return GL_INVALID_ENUM;
2014 }
2015
2016 case GL_BGR_INTEGER_EXT:
2017 switch (type) {
2018 case GL_BYTE:
2019 case GL_UNSIGNED_BYTE:
2020 case GL_SHORT:
2021 case GL_UNSIGNED_SHORT:
2022 case GL_INT:
2023 case GL_UNSIGNED_INT:
2024 /* NOTE: no packed formats w/ BGR format */
2025 return (ctx->Version >= 30 ||
2026 ctx->Extensions.EXT_texture_integer)
2027 ? GL_NO_ERROR : GL_INVALID_ENUM;
2028 default:
2029 return GL_INVALID_ENUM;
2030 }
2031
2032 case GL_RGBA_INTEGER_EXT:
2033 case GL_BGRA_INTEGER_EXT:
2034 switch (type) {
2035 case GL_BYTE:
2036 case GL_UNSIGNED_BYTE:
2037 case GL_SHORT:
2038 case GL_UNSIGNED_SHORT:
2039 case GL_INT:
2040 case GL_UNSIGNED_INT:
2041 return (ctx->Version >= 30 ||
2042 ctx->Extensions.EXT_texture_integer)
2043 ? GL_NO_ERROR : GL_INVALID_ENUM;
2044 case GL_UNSIGNED_SHORT_4_4_4_4:
2045 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2046 case GL_UNSIGNED_SHORT_5_5_5_1:
2047 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2048 case GL_UNSIGNED_INT_8_8_8_8:
2049 case GL_UNSIGNED_INT_8_8_8_8_REV:
2050 case GL_UNSIGNED_INT_10_10_10_2:
2051 case GL_UNSIGNED_INT_2_10_10_10_REV:
2052 return ctx->Extensions.ARB_texture_rgb10_a2ui
2053 ? GL_NO_ERROR : GL_INVALID_ENUM;
2054 default:
2055 return GL_INVALID_ENUM;
2056 }
2057
2058 case GL_LUMINANCE_INTEGER_EXT:
2059 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2060 switch (type) {
2061 case GL_BYTE:
2062 case GL_UNSIGNED_BYTE:
2063 case GL_SHORT:
2064 case GL_UNSIGNED_SHORT:
2065 case GL_INT:
2066 case GL_UNSIGNED_INT:
2067 return ctx->Extensions.EXT_texture_integer
2068 ? GL_NO_ERROR : GL_INVALID_ENUM;
2069 default:
2070 return GL_INVALID_ENUM;
2071 }
2072
2073 default:
2074 return GL_INVALID_ENUM;
2075 }
2076 return GL_NO_ERROR;
2077 }
2078
2079
2080 /**
2081 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2082 * and glTex[Sub]Image.
2083 * \return error code, or GL_NO_ERROR.
2084 */
2085 GLenum
2086 _mesa_es_error_check_format_and_type(GLenum format, GLenum type,
2087 unsigned dimensions)
2088 {
2089 GLboolean type_valid = GL_TRUE;
2090
2091 switch (format) {
2092 case GL_ALPHA:
2093 case GL_LUMINANCE:
2094 case GL_LUMINANCE_ALPHA:
2095 type_valid = (type == GL_UNSIGNED_BYTE
2096 || type == GL_FLOAT
2097 || type == GL_HALF_FLOAT_OES);
2098 break;
2099
2100 case GL_RGB:
2101 type_valid = (type == GL_UNSIGNED_BYTE
2102 || type == GL_UNSIGNED_SHORT_5_6_5
2103 || type == GL_FLOAT
2104 || type == GL_HALF_FLOAT_OES);
2105 break;
2106
2107 case GL_RGBA:
2108 type_valid = (type == GL_UNSIGNED_BYTE
2109 || type == GL_UNSIGNED_SHORT_4_4_4_4
2110 || type == GL_UNSIGNED_SHORT_5_5_5_1
2111 || type == GL_FLOAT
2112 || type == GL_HALF_FLOAT_OES
2113 || type == GL_UNSIGNED_INT_2_10_10_10_REV);
2114 break;
2115
2116 case GL_DEPTH_COMPONENT:
2117 /* This format is filtered against invalid dimensionalities elsewhere.
2118 */
2119 type_valid = (type == GL_UNSIGNED_SHORT
2120 || type == GL_UNSIGNED_INT);
2121 break;
2122
2123 case GL_DEPTH_STENCIL:
2124 /* This format is filtered against invalid dimensionalities elsewhere.
2125 */
2126 type_valid = (type == GL_UNSIGNED_INT_24_8);
2127 break;
2128
2129 case GL_BGRA_EXT:
2130 type_valid = (type == GL_UNSIGNED_BYTE);
2131
2132 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2133 * the format does not appear to be allowed for 3D textures in OpenGL
2134 * ES.
2135 */
2136 if (dimensions != 2)
2137 return GL_INVALID_VALUE;
2138
2139 break;
2140
2141 default:
2142 return GL_INVALID_VALUE;
2143 }
2144
2145 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2146 }
2147
2148
2149 /**
2150 * Do error checking of format/type combinations for OpenGL ES 3
2151 * glTex[Sub]Image.
2152 * \return error code, or GL_NO_ERROR.
2153 */
2154 GLenum
2155 _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
2156 GLenum format, GLenum type,
2157 GLenum internalFormat)
2158 {
2159 switch (format) {
2160 case GL_RGBA:
2161 switch (type) {
2162 case GL_UNSIGNED_BYTE:
2163 switch (internalFormat) {
2164 case GL_RGBA:
2165 case GL_RGBA8:
2166 case GL_RGB5_A1:
2167 case GL_RGBA4:
2168 case GL_SRGB8_ALPHA8_EXT:
2169 break;
2170 default:
2171 return GL_INVALID_OPERATION;
2172 }
2173 break;
2174
2175 case GL_BYTE:
2176 if (internalFormat != GL_RGBA8_SNORM)
2177 return GL_INVALID_OPERATION;
2178 break;
2179
2180 case GL_UNSIGNED_SHORT_4_4_4_4:
2181 switch (internalFormat) {
2182 case GL_RGBA:
2183 case GL_RGBA4:
2184 break;
2185 default:
2186 return GL_INVALID_OPERATION;
2187 }
2188 break;
2189
2190 case GL_UNSIGNED_SHORT_5_5_5_1:
2191 switch (internalFormat) {
2192 case GL_RGBA:
2193 case GL_RGB5_A1:
2194 break;
2195 default:
2196 return GL_INVALID_OPERATION;
2197 }
2198 break;
2199
2200 case GL_UNSIGNED_INT_2_10_10_10_REV:
2201 switch (internalFormat) {
2202 case GL_RGBA: /* GL_EXT_texture_type_2_10_10_10_REV */
2203 case GL_RGB10_A2:
2204 case GL_RGB5_A1:
2205 break;
2206 default:
2207 return GL_INVALID_OPERATION;
2208 }
2209 break;
2210
2211 case GL_HALF_FLOAT:
2212 if (internalFormat != GL_RGBA16F)
2213 return GL_INVALID_OPERATION;
2214 break;
2215
2216 case GL_FLOAT:
2217 switch (internalFormat) {
2218 case GL_RGBA16F:
2219 case GL_RGBA32F:
2220 break;
2221 case GL_RGBA:
2222 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2223 break;
2224 default:
2225 return GL_INVALID_OPERATION;
2226 }
2227 break;
2228
2229 case GL_HALF_FLOAT_OES:
2230 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2231 break;
2232 default:
2233 return GL_INVALID_OPERATION;
2234 }
2235 break;
2236
2237 case GL_RGBA_INTEGER:
2238 switch (type) {
2239 case GL_UNSIGNED_BYTE:
2240 if (internalFormat != GL_RGBA8UI)
2241 return GL_INVALID_OPERATION;
2242 break;
2243
2244 case GL_BYTE:
2245 if (internalFormat != GL_RGBA8I)
2246 return GL_INVALID_OPERATION;
2247 break;
2248
2249 case GL_UNSIGNED_SHORT:
2250 if (internalFormat != GL_RGBA16UI)
2251 return GL_INVALID_OPERATION;
2252 break;
2253
2254 case GL_SHORT:
2255 if (internalFormat != GL_RGBA16I)
2256 return GL_INVALID_OPERATION;
2257 break;
2258
2259 case GL_UNSIGNED_INT:
2260 if (internalFormat != GL_RGBA32UI)
2261 return GL_INVALID_OPERATION;
2262 break;
2263
2264 case GL_INT:
2265 if (internalFormat != GL_RGBA32I)
2266 return GL_INVALID_OPERATION;
2267 break;
2268
2269 case GL_UNSIGNED_INT_2_10_10_10_REV:
2270 if (internalFormat != GL_RGB10_A2UI)
2271 return GL_INVALID_OPERATION;
2272 break;
2273
2274 default:
2275 return GL_INVALID_OPERATION;
2276 }
2277 break;
2278
2279 case GL_RGB:
2280 switch (type) {
2281 case GL_UNSIGNED_BYTE:
2282 switch (internalFormat) {
2283 case GL_RGB:
2284 case GL_RGB8:
2285 case GL_RGB565:
2286 case GL_SRGB8:
2287 break;
2288 default:
2289 return GL_INVALID_OPERATION;
2290 }
2291 break;
2292
2293 case GL_BYTE:
2294 if (internalFormat != GL_RGB8_SNORM)
2295 return GL_INVALID_OPERATION;
2296 break;
2297
2298 case GL_UNSIGNED_SHORT_5_6_5:
2299 switch (internalFormat) {
2300 case GL_RGB:
2301 case GL_RGB565:
2302 break;
2303 default:
2304 return GL_INVALID_OPERATION;
2305 }
2306 break;
2307
2308 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2309 if (internalFormat != GL_R11F_G11F_B10F)
2310 return GL_INVALID_OPERATION;
2311 break;
2312
2313 case GL_UNSIGNED_INT_5_9_9_9_REV:
2314 if (internalFormat != GL_RGB9_E5)
2315 return GL_INVALID_OPERATION;
2316 break;
2317
2318 case GL_HALF_FLOAT:
2319 switch (internalFormat) {
2320 case GL_RGB16F:
2321 case GL_R11F_G11F_B10F:
2322 case GL_RGB9_E5:
2323 break;
2324 default:
2325 return GL_INVALID_OPERATION;
2326 }
2327 break;
2328
2329 case GL_FLOAT:
2330 switch (internalFormat) {
2331 case GL_RGB16F:
2332 case GL_RGB32F:
2333 case GL_R11F_G11F_B10F:
2334 case GL_RGB9_E5:
2335 break;
2336 case GL_RGB:
2337 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2338 break;
2339 default:
2340 return GL_INVALID_OPERATION;
2341 }
2342 break;
2343
2344 case GL_HALF_FLOAT_OES:
2345 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
2346 return GL_INVALID_OPERATION;
2347 break;
2348
2349 case GL_UNSIGNED_INT_2_10_10_10_REV:
2350 switch (internalFormat) {
2351 case GL_RGB: /* GL_EXT_texture_type_2_10_10_10_REV */
2352 break;
2353 default:
2354 return GL_INVALID_OPERATION;
2355 }
2356 break;
2357
2358 default:
2359 return GL_INVALID_OPERATION;
2360 }
2361 break;
2362
2363 case GL_RGB_INTEGER:
2364 switch (type) {
2365 case GL_UNSIGNED_BYTE:
2366 if (internalFormat != GL_RGB8UI)
2367 return GL_INVALID_OPERATION;
2368 break;
2369
2370 case GL_BYTE:
2371 if (internalFormat != GL_RGB8I)
2372 return GL_INVALID_OPERATION;
2373 break;
2374
2375 case GL_UNSIGNED_SHORT:
2376 if (internalFormat != GL_RGB16UI)
2377 return GL_INVALID_OPERATION;
2378 break;
2379
2380 case GL_SHORT:
2381 if (internalFormat != GL_RGB16I)
2382 return GL_INVALID_OPERATION;
2383 break;
2384
2385 case GL_UNSIGNED_INT:
2386 if (internalFormat != GL_RGB32UI)
2387 return GL_INVALID_OPERATION;
2388 break;
2389
2390 case GL_INT:
2391 if (internalFormat != GL_RGB32I)
2392 return GL_INVALID_OPERATION;
2393 break;
2394
2395 default:
2396 return GL_INVALID_OPERATION;
2397 }
2398 break;
2399
2400 case GL_RG:
2401 switch (type) {
2402 case GL_UNSIGNED_BYTE:
2403 if (internalFormat != GL_RG8)
2404 return GL_INVALID_OPERATION;
2405 break;
2406
2407 case GL_BYTE:
2408 if (internalFormat != GL_RG8_SNORM)
2409 return GL_INVALID_OPERATION;
2410 break;
2411
2412 case GL_HALF_FLOAT:
2413 case GL_HALF_FLOAT_OES:
2414 switch (internalFormat) {
2415 case GL_RG16F:
2416 break;
2417 case GL_RG:
2418 if (ctx->Extensions.ARB_texture_rg &&
2419 ctx->Extensions.OES_texture_half_float)
2420 break;
2421 /* fallthrough */
2422 default:
2423 return GL_INVALID_OPERATION;
2424 }
2425 break;
2426
2427 case GL_FLOAT:
2428 switch (internalFormat) {
2429 case GL_RG16F:
2430 case GL_RG32F:
2431 break;
2432 case GL_RG:
2433 if (ctx->Extensions.ARB_texture_rg &&
2434 ctx->Extensions.OES_texture_float)
2435 break;
2436 /* fallthrough */
2437 default:
2438 return GL_INVALID_OPERATION;
2439 }
2440 break;
2441
2442 default:
2443 return GL_INVALID_OPERATION;
2444 }
2445 break;
2446
2447 case GL_RG_INTEGER:
2448 switch (type) {
2449 case GL_UNSIGNED_BYTE:
2450 if (internalFormat != GL_RG8UI)
2451 return GL_INVALID_OPERATION;
2452 break;
2453
2454 case GL_BYTE:
2455 if (internalFormat != GL_RG8I)
2456 return GL_INVALID_OPERATION;
2457 break;
2458
2459 case GL_UNSIGNED_SHORT:
2460 if (internalFormat != GL_RG16UI)
2461 return GL_INVALID_OPERATION;
2462 break;
2463
2464 case GL_SHORT:
2465 if (internalFormat != GL_RG16I)
2466 return GL_INVALID_OPERATION;
2467 break;
2468
2469 case GL_UNSIGNED_INT:
2470 if (internalFormat != GL_RG32UI)
2471 return GL_INVALID_OPERATION;
2472 break;
2473
2474 case GL_INT:
2475 if (internalFormat != GL_RG32I)
2476 return GL_INVALID_OPERATION;
2477 break;
2478
2479 default:
2480 return GL_INVALID_OPERATION;
2481 }
2482 break;
2483
2484 case GL_RED:
2485 switch (type) {
2486 case GL_UNSIGNED_BYTE:
2487 if (internalFormat != GL_R8)
2488 return GL_INVALID_OPERATION;
2489 break;
2490
2491 case GL_BYTE:
2492 if (internalFormat != GL_R8_SNORM)
2493 return GL_INVALID_OPERATION;
2494 break;
2495
2496 case GL_HALF_FLOAT:
2497 case GL_HALF_FLOAT_OES:
2498 switch (internalFormat) {
2499 case GL_R16F:
2500 break;
2501 case GL_RG:
2502 case GL_RED:
2503 if (ctx->Extensions.ARB_texture_rg &&
2504 ctx->Extensions.OES_texture_half_float)
2505 break;
2506 /* fallthrough */
2507 default:
2508 return GL_INVALID_OPERATION;
2509 }
2510 break;
2511
2512 case GL_FLOAT:
2513 switch (internalFormat) {
2514 case GL_R16F:
2515 case GL_R32F:
2516 break;
2517 case GL_RED:
2518 if (ctx->Extensions.ARB_texture_rg &&
2519 ctx->Extensions.OES_texture_float)
2520 break;
2521 /* fallthrough */
2522 default:
2523 return GL_INVALID_OPERATION;
2524 }
2525 break;
2526
2527 default:
2528 return GL_INVALID_OPERATION;
2529 }
2530 break;
2531
2532 case GL_RED_INTEGER:
2533 switch (type) {
2534 case GL_UNSIGNED_BYTE:
2535 if (internalFormat != GL_R8UI)
2536 return GL_INVALID_OPERATION;
2537 break;
2538
2539 case GL_BYTE:
2540 if (internalFormat != GL_R8I)
2541 return GL_INVALID_OPERATION;
2542 break;
2543
2544 case GL_UNSIGNED_SHORT:
2545 if (internalFormat != GL_R16UI)
2546 return GL_INVALID_OPERATION;
2547 break;
2548
2549 case GL_SHORT:
2550 if (internalFormat != GL_R16I)
2551 return GL_INVALID_OPERATION;
2552 break;
2553
2554 case GL_UNSIGNED_INT:
2555 if (internalFormat != GL_R32UI)
2556 return GL_INVALID_OPERATION;
2557 break;
2558
2559 case GL_INT:
2560 if (internalFormat != GL_R32I)
2561 return GL_INVALID_OPERATION;
2562 break;
2563
2564 default:
2565 return GL_INVALID_OPERATION;
2566 }
2567 break;
2568
2569 case GL_DEPTH_COMPONENT:
2570 switch (type) {
2571 case GL_UNSIGNED_SHORT:
2572 if (internalFormat != GL_DEPTH_COMPONENT
2573 && internalFormat != GL_DEPTH_COMPONENT16)
2574 return GL_INVALID_OPERATION;
2575 break;
2576
2577 case GL_UNSIGNED_INT:
2578 switch (internalFormat) {
2579 case GL_DEPTH_COMPONENT:
2580 case GL_DEPTH_COMPONENT16:
2581 case GL_DEPTH_COMPONENT24:
2582 break;
2583 default:
2584 return GL_INVALID_OPERATION;
2585 }
2586 break;
2587
2588 case GL_FLOAT:
2589 if (internalFormat != GL_DEPTH_COMPONENT32F)
2590 return GL_INVALID_OPERATION;
2591 break;
2592
2593 default:
2594 return GL_INVALID_OPERATION;
2595 }
2596 break;
2597
2598 case GL_DEPTH_STENCIL:
2599 switch (type) {
2600 case GL_UNSIGNED_INT_24_8:
2601 if (internalFormat != GL_DEPTH_STENCIL
2602 && internalFormat != GL_DEPTH24_STENCIL8)
2603 return GL_INVALID_OPERATION;
2604 break;
2605
2606 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2607 if (internalFormat != GL_DEPTH32F_STENCIL8)
2608 return GL_INVALID_OPERATION;
2609 break;
2610
2611 default:
2612 return GL_INVALID_OPERATION;
2613 }
2614 break;
2615
2616 case GL_ALPHA:
2617 case GL_LUMINANCE:
2618 case GL_LUMINANCE_ALPHA:
2619 switch (type) {
2620 case GL_FLOAT:
2621 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2622 break;
2623 case GL_HALF_FLOAT_OES:
2624 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2625 break;
2626 default:
2627 if (type != GL_UNSIGNED_BYTE || format != internalFormat)
2628 return GL_INVALID_OPERATION;
2629 }
2630 }
2631
2632 return GL_NO_ERROR;
2633 }
2634
2635 static void
2636 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
2637 {
2638 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
2639 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
2640 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
2641 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
2642 }
2643
2644 static bool
2645 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
2646 {
2647 switch (format) {
2648 case GL_RGBA:
2649 case GL_RGBA_INTEGER_EXT:
2650 set_swizzle(swizzle, 0, 1, 2, 3);
2651 return true;
2652 case GL_BGRA:
2653 case GL_BGRA_INTEGER_EXT:
2654 set_swizzle(swizzle, 2, 1, 0, 3);
2655 return true;
2656 case GL_ABGR_EXT:
2657 set_swizzle(swizzle, 3, 2, 1, 0);
2658 return true;
2659 case GL_RGB:
2660 case GL_RGB_INTEGER_EXT:
2661 set_swizzle(swizzle, 0, 1, 2, 5);
2662 return true;
2663 case GL_BGR:
2664 case GL_BGR_INTEGER_EXT:
2665 set_swizzle(swizzle, 2, 1, 0, 5);
2666 return true;
2667 case GL_LUMINANCE_ALPHA:
2668 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2669 set_swizzle(swizzle, 0, 0, 0, 1);
2670 return true;
2671 case GL_RG:
2672 case GL_RG_INTEGER:
2673 set_swizzle(swizzle, 0, 1, 4, 5);
2674 return true;
2675 case GL_RED:
2676 case GL_RED_INTEGER_EXT:
2677 set_swizzle(swizzle, 0, 4, 4, 5);
2678 return true;
2679 case GL_GREEN:
2680 case GL_GREEN_INTEGER_EXT:
2681 set_swizzle(swizzle, 4, 0, 4, 5);
2682 return true;
2683 case GL_BLUE:
2684 case GL_BLUE_INTEGER_EXT:
2685 set_swizzle(swizzle, 4, 4, 0, 5);
2686 return true;
2687 case GL_ALPHA:
2688 case GL_ALPHA_INTEGER_EXT:
2689 set_swizzle(swizzle, 4, 4, 4, 0);
2690 return true;
2691 case GL_LUMINANCE:
2692 case GL_LUMINANCE_INTEGER_EXT:
2693 set_swizzle(swizzle, 0, 0, 0, 5);
2694 return true;
2695 case GL_INTENSITY:
2696 set_swizzle(swizzle, 0, 0, 0, 0);
2697 return true;
2698 default:
2699 return false;
2700 }
2701 }
2702
2703 /**
2704 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
2705 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
2706 * otherwise (for non-array formats).
2707 *
2708 * This function will typically be used to compute a mesa format from a GL type
2709 * so we can then call _mesa_format_convert. This function does
2710 * not consider byte swapping, so it returns types assuming that no byte
2711 * swapping is involved. If byte swapping is involved then clients are supposed
2712 * to handle that on their side before calling _mesa_format_convert.
2713 *
2714 * This function returns an uint32_t that can pack a mesa_format or a
2715 * mesa_array_format. Clients must check the mesa array format bit
2716 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
2717 * format is a mesa_array_format or a mesa_format.
2718 */
2719 uint32_t
2720 _mesa_format_from_format_and_type(GLenum format, GLenum type)
2721 {
2722 bool is_array_format = true;
2723 uint8_t swizzle[4];
2724 bool normalized = false, is_float = false, is_signed = false;
2725 int num_channels = 0, type_size = 0;
2726
2727 /* Extract array format type information from the OpenGL data type */
2728 switch (type) {
2729 case GL_UNSIGNED_BYTE:
2730 type_size = 1;
2731 break;
2732 case GL_BYTE:
2733 type_size = 1;
2734 is_signed = true;
2735 break;
2736 case GL_UNSIGNED_SHORT:
2737 type_size = 2;
2738 break;
2739 case GL_SHORT:
2740 type_size = 2;
2741 is_signed = true;
2742 break;
2743 case GL_UNSIGNED_INT:
2744 type_size = 4;
2745 break;
2746 case GL_INT:
2747 type_size = 4;
2748 is_signed = true;
2749 break;
2750 case GL_HALF_FLOAT:
2751 case GL_HALF_FLOAT_OES:
2752 type_size = 2;
2753 is_signed = true;
2754 is_float = true;
2755 break;
2756 case GL_FLOAT:
2757 type_size = 4;
2758 is_signed = true;
2759 is_float = true;
2760 break;
2761 default:
2762 is_array_format = false;
2763 break;
2764 }
2765
2766 /* Extract array format swizzle information from the OpenGL format */
2767 if (is_array_format)
2768 is_array_format = get_swizzle_from_gl_format(format, swizzle);
2769
2770 /* If this is an array format type after checking data type and format,
2771 * create the array format
2772 */
2773 if (is_array_format) {
2774 normalized = !_mesa_is_enum_format_integer(format);
2775 num_channels = _mesa_components_in_format(format);
2776
2777 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
2778 normalized, num_channels,
2779 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
2780 }
2781
2782 /* Otherwise this is not an array format, so return the mesa_format
2783 * matching the OpenGL format and data type
2784 */
2785 switch (type) {
2786 case GL_UNSIGNED_SHORT_5_6_5:
2787 if (format == GL_RGB)
2788 return MESA_FORMAT_B5G6R5_UNORM;
2789 else if (format == GL_BGR)
2790 return MESA_FORMAT_R5G6B5_UNORM;
2791 break;
2792 case GL_UNSIGNED_SHORT_5_6_5_REV:
2793 if (format == GL_RGB)
2794 return MESA_FORMAT_R5G6B5_UNORM;
2795 else if (format == GL_BGR)
2796 return MESA_FORMAT_B5G6R5_UNORM;
2797 break;
2798 case GL_UNSIGNED_SHORT_4_4_4_4:
2799 if (format == GL_RGBA)
2800 return MESA_FORMAT_A4B4G4R4_UNORM;
2801 else if (format == GL_BGRA)
2802 return MESA_FORMAT_A4R4G4B4_UNORM;
2803 else if (format == GL_ABGR_EXT)
2804 return MESA_FORMAT_R4G4B4A4_UNORM;
2805 break;
2806 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2807 if (format == GL_RGBA)
2808 return MESA_FORMAT_R4G4B4A4_UNORM;
2809 else if (format == GL_BGRA)
2810 return MESA_FORMAT_B4G4R4A4_UNORM;
2811 else if (format == GL_ABGR_EXT)
2812 return MESA_FORMAT_A4B4G4R4_UNORM;
2813 break;
2814 case GL_UNSIGNED_SHORT_5_5_5_1:
2815 if (format == GL_RGBA)
2816 return MESA_FORMAT_A1B5G5R5_UNORM;
2817 else if (format == GL_BGRA)
2818 return MESA_FORMAT_A1R5G5B5_UNORM;
2819 break;
2820 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2821 if (format == GL_RGBA)
2822 return MESA_FORMAT_R5G5B5A1_UNORM;
2823 else if (format == GL_BGRA)
2824 return MESA_FORMAT_B5G5R5A1_UNORM;
2825 break;
2826 case GL_UNSIGNED_BYTE_3_3_2:
2827 if (format == GL_RGB)
2828 return MESA_FORMAT_B2G3R3_UNORM;
2829 break;
2830 case GL_UNSIGNED_BYTE_2_3_3_REV:
2831 if (format == GL_RGB)
2832 return MESA_FORMAT_R3G3B2_UNORM;
2833 break;
2834 case GL_UNSIGNED_INT_5_9_9_9_REV:
2835 if (format == GL_RGB)
2836 return MESA_FORMAT_R9G9B9E5_FLOAT;
2837 break;
2838 case GL_UNSIGNED_INT_10_10_10_2:
2839 if (format == GL_RGBA)
2840 return MESA_FORMAT_A2B10G10R10_UNORM;
2841 else if (format == GL_RGBA_INTEGER)
2842 return MESA_FORMAT_A2B10G10R10_UINT;
2843 else if (format == GL_BGRA)
2844 return MESA_FORMAT_A2R10G10B10_UNORM;
2845 else if (format == GL_BGRA_INTEGER)
2846 return MESA_FORMAT_A2R10G10B10_UINT;
2847 break;
2848 case GL_UNSIGNED_INT_2_10_10_10_REV:
2849 if (format == GL_RGB)
2850 return MESA_FORMAT_R10G10B10X2_UNORM;
2851 if (format == GL_RGBA)
2852 return MESA_FORMAT_R10G10B10A2_UNORM;
2853 else if (format == GL_RGBA_INTEGER)
2854 return MESA_FORMAT_R10G10B10A2_UINT;
2855 else if (format == GL_BGRA)
2856 return MESA_FORMAT_B10G10R10A2_UNORM;
2857 else if (format == GL_BGRA_INTEGER)
2858 return MESA_FORMAT_B10G10R10A2_UINT;
2859 break;
2860 case GL_UNSIGNED_INT_8_8_8_8:
2861 if (format == GL_RGBA)
2862 return MESA_FORMAT_A8B8G8R8_UNORM;
2863 else if (format == GL_BGRA)
2864 return MESA_FORMAT_A8R8G8B8_UNORM;
2865 else if (format == GL_ABGR_EXT)
2866 return MESA_FORMAT_R8G8B8A8_UNORM;
2867 break;
2868 case GL_UNSIGNED_INT_8_8_8_8_REV:
2869 if (format == GL_RGBA)
2870 return MESA_FORMAT_R8G8B8A8_UNORM;
2871 else if (format == GL_BGRA)
2872 return MESA_FORMAT_B8G8R8A8_UNORM;
2873 else if (format == GL_ABGR_EXT)
2874 return MESA_FORMAT_A8B8G8R8_UNORM;
2875 break;
2876 case GL_UNSIGNED_SHORT_8_8_MESA:
2877 if (format == GL_YCBCR_MESA)
2878 return MESA_FORMAT_YCBCR;
2879 break;
2880 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
2881 if (format == GL_YCBCR_MESA)
2882 return MESA_FORMAT_YCBCR_REV;
2883 break;
2884 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2885 if (format == GL_RGB)
2886 return MESA_FORMAT_R11G11B10_FLOAT;
2887 default:
2888 break;
2889 }
2890
2891 /* If we got here it means that we could not find a Mesa format that
2892 * matches the GL format/type provided. We may need to add a new Mesa
2893 * format in that case.
2894 */
2895 unreachable("Unsupported format");
2896 }