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mesa: add ASTC 2D LDR decoder
[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 "texcompress.h"
32 #include "enums.h"
33
34 enum {
35 ZERO = 4,
36 ONE = 5
37 };
38
39 enum {
40 IDX_LUMINANCE = 0,
41 IDX_ALPHA,
42 IDX_INTENSITY,
43 IDX_LUMINANCE_ALPHA,
44 IDX_RGB,
45 IDX_RGBA,
46 IDX_RED,
47 IDX_GREEN,
48 IDX_BLUE,
49 IDX_BGR,
50 IDX_BGRA,
51 IDX_ABGR,
52 IDX_RG,
53 MAX_IDX
54 };
55
56 #define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
57 #define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
58 #define MAP3(x,y,z) MAP4(x, y, z, ZERO)
59 #define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
60
61 static const struct {
62 GLubyte format_idx;
63 GLubyte to_rgba[6];
64 GLubyte from_rgba[6];
65 } mappings[MAX_IDX] =
66 {
67 {
68 IDX_LUMINANCE,
69 MAP4(0,0,0,ONE),
70 MAP1(0)
71 },
72
73 {
74 IDX_ALPHA,
75 MAP4(ZERO, ZERO, ZERO, 0),
76 MAP1(3)
77 },
78
79 {
80 IDX_INTENSITY,
81 MAP4(0, 0, 0, 0),
82 MAP1(0),
83 },
84
85 {
86 IDX_LUMINANCE_ALPHA,
87 MAP4(0,0,0,1),
88 MAP2(0,3)
89 },
90
91 {
92 IDX_RGB,
93 MAP4(0,1,2,ONE),
94 MAP3(0,1,2)
95 },
96
97 {
98 IDX_RGBA,
99 MAP4(0,1,2,3),
100 MAP4(0,1,2,3),
101 },
102
103 {
104 IDX_RED,
105 MAP4(0, ZERO, ZERO, ONE),
106 MAP1(0),
107 },
108
109 {
110 IDX_GREEN,
111 MAP4(ZERO, 0, ZERO, ONE),
112 MAP1(1),
113 },
114
115 {
116 IDX_BLUE,
117 MAP4(ZERO, ZERO, 0, ONE),
118 MAP1(2),
119 },
120
121 {
122 IDX_BGR,
123 MAP4(2,1,0,ONE),
124 MAP3(2,1,0)
125 },
126
127 {
128 IDX_BGRA,
129 MAP4(2,1,0,3),
130 MAP4(2,1,0,3)
131 },
132
133 {
134 IDX_ABGR,
135 MAP4(3,2,1,0),
136 MAP4(3,2,1,0)
137 },
138
139 {
140 IDX_RG,
141 MAP4(0, 1, ZERO, ONE),
142 MAP2(0, 1)
143 },
144 };
145
146 /**
147 * Convert a GL image format enum to an IDX_* value (see above).
148 */
149 static int
150 get_map_idx(GLenum value)
151 {
152 switch (value) {
153 case GL_LUMINANCE:
154 case GL_LUMINANCE_INTEGER_EXT:
155 return IDX_LUMINANCE;
156 case GL_ALPHA:
157 case GL_ALPHA_INTEGER:
158 return IDX_ALPHA;
159 case GL_INTENSITY:
160 return IDX_INTENSITY;
161 case GL_LUMINANCE_ALPHA:
162 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
163 return IDX_LUMINANCE_ALPHA;
164 case GL_RGB:
165 case GL_RGB_INTEGER:
166 return IDX_RGB;
167 case GL_RGBA:
168 case GL_RGBA_INTEGER:
169 return IDX_RGBA;
170 case GL_RED:
171 case GL_RED_INTEGER:
172 return IDX_RED;
173 case GL_GREEN:
174 return IDX_GREEN;
175 case GL_BLUE:
176 return IDX_BLUE;
177 case GL_BGR:
178 case GL_BGR_INTEGER:
179 return IDX_BGR;
180 case GL_BGRA:
181 case GL_BGRA_INTEGER:
182 return IDX_BGRA;
183 case GL_ABGR_EXT:
184 return IDX_ABGR;
185 case GL_RG:
186 case GL_RG_INTEGER:
187 return IDX_RG;
188 default:
189 _mesa_problem(NULL, "Unexpected inFormat %s",
190 _mesa_enum_to_string(value));
191 return 0;
192 }
193 }
194
195 /**
196 * When promoting texture formats (see below) we need to compute the
197 * mapping of dest components back to source components.
198 * This function does that.
199 * \param inFormat the incoming format of the texture
200 * \param outFormat the final texture format
201 * \return map[6] a full 6-component map
202 */
203 void
204 _mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
205 {
206 const int inFmt = get_map_idx(inFormat);
207 const int outFmt = get_map_idx(outFormat);
208 const GLubyte *in2rgba = mappings[inFmt].to_rgba;
209 const GLubyte *rgba2out = mappings[outFmt].from_rgba;
210 int i;
211
212 for (i = 0; i < 4; i++)
213 map[i] = in2rgba[rgba2out[i]];
214
215 map[ZERO] = ZERO;
216 map[ONE] = ONE;
217
218 #if 0
219 printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
220 inFormat, _mesa_enum_to_string(inFormat),
221 outFormat, _mesa_enum_to_string(outFormat),
222 map[0],
223 map[1],
224 map[2],
225 map[3],
226 map[4],
227 map[5]);
228 #endif
229 }
230
231 /**
232 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
233 */
234 GLboolean
235 _mesa_type_is_packed(GLenum type)
236 {
237 switch (type) {
238 case GL_UNSIGNED_BYTE_3_3_2:
239 case GL_UNSIGNED_BYTE_2_3_3_REV:
240 case MESA_UNSIGNED_BYTE_4_4:
241 case GL_UNSIGNED_SHORT_5_6_5:
242 case GL_UNSIGNED_SHORT_5_6_5_REV:
243 case GL_UNSIGNED_SHORT_4_4_4_4:
244 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
245 case GL_UNSIGNED_SHORT_5_5_5_1:
246 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
247 case GL_UNSIGNED_INT_8_8_8_8:
248 case GL_UNSIGNED_INT_8_8_8_8_REV:
249 case GL_UNSIGNED_INT_10_10_10_2:
250 case GL_UNSIGNED_INT_2_10_10_10_REV:
251 case GL_UNSIGNED_SHORT_8_8_MESA:
252 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
253 case GL_UNSIGNED_INT_24_8_EXT:
254 case GL_UNSIGNED_INT_5_9_9_9_REV:
255 case GL_UNSIGNED_INT_10F_11F_11F_REV:
256 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
257 return GL_TRUE;
258 }
259
260 return GL_FALSE;
261 }
262
263
264 /**
265 * Get the size of a GL data type.
266 *
267 * \param type GL data type.
268 *
269 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
270 * if an invalid type enum.
271 */
272 GLint
273 _mesa_sizeof_type(GLenum type)
274 {
275 switch (type) {
276 case GL_BITMAP:
277 return 0;
278 case GL_UNSIGNED_BYTE:
279 return sizeof(GLubyte);
280 case GL_BYTE:
281 return sizeof(GLbyte);
282 case GL_UNSIGNED_SHORT:
283 return sizeof(GLushort);
284 case GL_SHORT:
285 return sizeof(GLshort);
286 case GL_UNSIGNED_INT:
287 return sizeof(GLuint);
288 case GL_INT:
289 return sizeof(GLint);
290 case GL_FLOAT:
291 return sizeof(GLfloat);
292 case GL_DOUBLE:
293 return sizeof(GLdouble);
294 case GL_HALF_FLOAT_ARB:
295 case GL_HALF_FLOAT_OES:
296 return sizeof(GLhalfARB);
297 case GL_FIXED:
298 return sizeof(GLfixed);
299 default:
300 return -1;
301 }
302 }
303
304
305 /**
306 * Same as _mesa_sizeof_type() but also accepting the packed pixel
307 * format data types.
308 */
309 GLint
310 _mesa_sizeof_packed_type(GLenum type)
311 {
312 switch (type) {
313 case GL_BITMAP:
314 return 0;
315 case GL_UNSIGNED_BYTE:
316 return sizeof(GLubyte);
317 case GL_BYTE:
318 return sizeof(GLbyte);
319 case GL_UNSIGNED_SHORT:
320 return sizeof(GLushort);
321 case GL_SHORT:
322 return sizeof(GLshort);
323 case GL_UNSIGNED_INT:
324 return sizeof(GLuint);
325 case GL_INT:
326 return sizeof(GLint);
327 case GL_HALF_FLOAT_ARB:
328 case GL_HALF_FLOAT_OES:
329 return sizeof(GLhalfARB);
330 case GL_FLOAT:
331 return sizeof(GLfloat);
332 case GL_UNSIGNED_BYTE_3_3_2:
333 case GL_UNSIGNED_BYTE_2_3_3_REV:
334 case MESA_UNSIGNED_BYTE_4_4:
335 return sizeof(GLubyte);
336 case GL_UNSIGNED_SHORT_5_6_5:
337 case GL_UNSIGNED_SHORT_5_6_5_REV:
338 case GL_UNSIGNED_SHORT_4_4_4_4:
339 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
340 case GL_UNSIGNED_SHORT_5_5_5_1:
341 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
342 case GL_UNSIGNED_SHORT_8_8_MESA:
343 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
344 return sizeof(GLushort);
345 case GL_UNSIGNED_INT_8_8_8_8:
346 case GL_UNSIGNED_INT_8_8_8_8_REV:
347 case GL_UNSIGNED_INT_10_10_10_2:
348 case GL_UNSIGNED_INT_2_10_10_10_REV:
349 case GL_UNSIGNED_INT_24_8_EXT:
350 case GL_UNSIGNED_INT_5_9_9_9_REV:
351 case GL_UNSIGNED_INT_10F_11F_11F_REV:
352 return sizeof(GLuint);
353 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
354 return 8;
355 default:
356 return -1;
357 }
358 }
359
360
361 /**
362 * Get the number of components in a pixel format.
363 *
364 * \param format pixel format.
365 *
366 * \return the number of components in the given format, or -1 if a bad format.
367 */
368 GLint
369 _mesa_components_in_format(GLenum format)
370 {
371 switch (format) {
372 case GL_COLOR_INDEX:
373 case GL_STENCIL_INDEX:
374 case GL_DEPTH_COMPONENT:
375 case GL_RED:
376 case GL_RED_INTEGER_EXT:
377 case GL_GREEN:
378 case GL_GREEN_INTEGER_EXT:
379 case GL_BLUE:
380 case GL_BLUE_INTEGER_EXT:
381 case GL_ALPHA:
382 case GL_ALPHA_INTEGER_EXT:
383 case GL_LUMINANCE:
384 case GL_LUMINANCE_INTEGER_EXT:
385 case GL_INTENSITY:
386 return 1;
387
388 case GL_LUMINANCE_ALPHA:
389 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
390 case GL_RG:
391 case GL_YCBCR_MESA:
392 case GL_DEPTH_STENCIL_EXT:
393 case GL_RG_INTEGER:
394 return 2;
395
396 case GL_RGB:
397 case GL_BGR:
398 case GL_RGB_INTEGER_EXT:
399 case GL_BGR_INTEGER_EXT:
400 return 3;
401
402 case GL_RGBA:
403 case GL_BGRA:
404 case GL_ABGR_EXT:
405 case GL_RGBA_INTEGER_EXT:
406 case GL_BGRA_INTEGER_EXT:
407 return 4;
408
409 default:
410 return -1;
411 }
412 }
413
414
415 /**
416 * Get the bytes per pixel of pixel format type pair.
417 *
418 * \param format pixel format.
419 * \param type pixel type.
420 *
421 * \return bytes per pixel, or -1 if a bad format or type was given.
422 */
423 GLint
424 _mesa_bytes_per_pixel(GLenum format, GLenum type)
425 {
426 GLint comps = _mesa_components_in_format(format);
427 if (comps < 0)
428 return -1;
429
430 switch (type) {
431 case GL_BITMAP:
432 return 0; /* special case */
433 case GL_BYTE:
434 case GL_UNSIGNED_BYTE:
435 return comps * sizeof(GLubyte);
436 case GL_SHORT:
437 case GL_UNSIGNED_SHORT:
438 return comps * sizeof(GLshort);
439 case GL_INT:
440 case GL_UNSIGNED_INT:
441 return comps * sizeof(GLint);
442 case GL_FLOAT:
443 return comps * sizeof(GLfloat);
444 case GL_HALF_FLOAT_ARB:
445 case GL_HALF_FLOAT_OES:
446 return comps * sizeof(GLhalfARB);
447 case GL_UNSIGNED_BYTE_3_3_2:
448 case GL_UNSIGNED_BYTE_2_3_3_REV:
449 if (format == GL_RGB || format == GL_BGR ||
450 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
451 return sizeof(GLubyte);
452 else
453 return -1; /* error */
454 case GL_UNSIGNED_SHORT_5_6_5:
455 case GL_UNSIGNED_SHORT_5_6_5_REV:
456 if (format == GL_RGB || format == GL_BGR ||
457 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
458 return sizeof(GLushort);
459 else
460 return -1; /* error */
461 case GL_UNSIGNED_SHORT_4_4_4_4:
462 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
463 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
464 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
465 return sizeof(GLushort);
466 else
467 return -1;
468 case GL_UNSIGNED_SHORT_5_5_5_1:
469 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
470 if (format == GL_RGBA || format == GL_BGRA ||
471 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
472 return sizeof(GLushort);
473 else
474 return -1;
475 case GL_UNSIGNED_INT_8_8_8_8:
476 case GL_UNSIGNED_INT_8_8_8_8_REV:
477 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
478 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
479 format == GL_RGB)
480 return sizeof(GLuint);
481 else
482 return -1;
483 case GL_UNSIGNED_INT_10_10_10_2:
484 case GL_UNSIGNED_INT_2_10_10_10_REV:
485 if (format == GL_RGBA || format == GL_BGRA ||
486 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
487 format == GL_RGB)
488 return sizeof(GLuint);
489 else
490 return -1;
491 case GL_UNSIGNED_SHORT_8_8_MESA:
492 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
493 if (format == GL_YCBCR_MESA)
494 return sizeof(GLushort);
495 else
496 return -1;
497 case GL_UNSIGNED_INT_24_8_EXT:
498 if (format == GL_DEPTH_COMPONENT ||
499 format == GL_DEPTH_STENCIL_EXT)
500 return sizeof(GLuint);
501 else
502 return -1;
503 case GL_UNSIGNED_INT_5_9_9_9_REV:
504 if (format == GL_RGB)
505 return sizeof(GLuint);
506 else
507 return -1;
508 case GL_UNSIGNED_INT_10F_11F_11F_REV:
509 if (format == GL_RGB)
510 return sizeof(GLuint);
511 else
512 return -1;
513 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
514 if (format == GL_DEPTH_STENCIL)
515 return 8;
516 else
517 return -1;
518 default:
519 return -1;
520 }
521 }
522
523
524 /**
525 * Get the number of bytes for a vertex attrib with the given number of
526 * components and type.
527 *
528 * \param comps number of components.
529 * \param type data type.
530 *
531 * \return bytes per attribute, or -1 if a bad comps/type combination was given.
532 */
533 GLint
534 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
535 {
536 switch (type) {
537 case GL_BYTE:
538 case GL_UNSIGNED_BYTE:
539 return comps * sizeof(GLubyte);
540 case GL_SHORT:
541 case GL_UNSIGNED_SHORT:
542 return comps * sizeof(GLshort);
543 case GL_INT:
544 case GL_UNSIGNED_INT:
545 return comps * sizeof(GLint);
546 case GL_FLOAT:
547 return comps * sizeof(GLfloat);
548 case GL_HALF_FLOAT_ARB:
549 case GL_HALF_FLOAT_OES:
550 return comps * sizeof(GLhalfARB);
551 case GL_DOUBLE:
552 return comps * sizeof(GLdouble);
553 case GL_FIXED:
554 return comps * sizeof(GLfixed);
555 case GL_INT_2_10_10_10_REV:
556 case GL_UNSIGNED_INT_2_10_10_10_REV:
557 if (comps == 4)
558 return sizeof(GLuint);
559 else
560 return -1;
561 case GL_UNSIGNED_INT_10F_11F_11F_REV:
562 if (comps == 3)
563 return sizeof(GLuint);
564 else
565 return -1;
566 case GL_UNSIGNED_INT64_ARB:
567 return comps * 8;
568 default:
569 return -1;
570 }
571 }
572
573 /**
574 * Test if the given format is unsized.
575 */
576 GLboolean
577 _mesa_is_enum_format_unsized(GLenum format)
578 {
579 switch (format) {
580 case GL_RGBA:
581 case GL_BGRA:
582 case GL_ABGR_EXT:
583 case GL_RGB:
584 case GL_BGR:
585 case GL_RG:
586 case GL_RED:
587 case GL_GREEN:
588 case GL_BLUE:
589 case GL_ALPHA:
590 case GL_INTENSITY:
591 case GL_LUMINANCE:
592 case GL_LUMINANCE_ALPHA:
593
594 case GL_SRGB:
595 case GL_SRGB_ALPHA:
596 case GL_SLUMINANCE:
597 case GL_SLUMINANCE_ALPHA:
598
599 case GL_RGBA_SNORM:
600 case GL_RGB_SNORM:
601 case GL_RG_SNORM:
602 case GL_RED_SNORM:
603 case GL_ALPHA_SNORM:
604 case GL_INTENSITY_SNORM:
605 case GL_LUMINANCE_SNORM:
606 case GL_LUMINANCE_ALPHA_SNORM:
607
608 case GL_RED_INTEGER:
609 case GL_GREEN_INTEGER:
610 case GL_BLUE_INTEGER:
611 case GL_ALPHA_INTEGER:
612 case GL_RGB_INTEGER:
613 case GL_RGBA_INTEGER:
614 case GL_BGR_INTEGER:
615 case GL_BGRA_INTEGER:
616 case GL_RG_INTEGER:
617 case GL_LUMINANCE_INTEGER_EXT:
618 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
619
620 case GL_DEPTH_COMPONENT:
621 case GL_DEPTH_STENCIL:
622 case GL_STENCIL_INDEX:
623 return GL_TRUE;
624 default:
625 return GL_FALSE;
626 }
627 }
628
629 /**
630 * Test if the given format is a UNORM (unsigned-normalized) format.
631 */
632 GLboolean
633 _mesa_is_enum_format_unorm(GLenum format)
634 {
635 switch(format) {
636 case GL_RED:
637 case GL_GREEN:
638 case GL_BLUE:
639 case GL_ALPHA:
640 case GL_ALPHA4:
641 case GL_ALPHA8:
642 case GL_ALPHA12:
643 case GL_ALPHA16:
644 case 1:
645 case GL_LUMINANCE:
646 case GL_SLUMINANCE:
647 case GL_LUMINANCE4:
648 case GL_LUMINANCE8:
649 case GL_LUMINANCE12:
650 case GL_LUMINANCE16:
651 case 2:
652 case GL_LUMINANCE_ALPHA:
653 case GL_SLUMINANCE_ALPHA:
654 case GL_LUMINANCE4_ALPHA4:
655 case GL_LUMINANCE6_ALPHA2:
656 case GL_LUMINANCE8_ALPHA8:
657 case GL_LUMINANCE12_ALPHA4:
658 case GL_LUMINANCE12_ALPHA12:
659 case GL_LUMINANCE16_ALPHA16:
660 case GL_INTENSITY:
661 case GL_INTENSITY4:
662 case GL_INTENSITY8:
663 case GL_INTENSITY12:
664 case GL_INTENSITY16:
665 case GL_R8:
666 case GL_R16:
667 case GL_RG:
668 case GL_RG8:
669 case GL_RG16:
670 case 3:
671 case GL_RGB:
672 case GL_BGR:
673 case GL_SRGB:
674 case GL_R3_G3_B2:
675 case GL_RGB4:
676 case GL_RGB5:
677 case GL_RGB565:
678 case GL_RGB8:
679 case GL_RGB10:
680 case GL_RGB12:
681 case GL_RGB16:
682 case 4:
683 case GL_ABGR_EXT:
684 case GL_RGBA:
685 case GL_BGRA:
686 case GL_SRGB_ALPHA:
687 case GL_RGBA2:
688 case GL_RGBA4:
689 case GL_RGB5_A1:
690 case GL_RGBA8:
691 case GL_RGB10_A2:
692 case GL_RGBA12:
693 case GL_RGBA16:
694 return GL_TRUE;
695 default:
696 return GL_FALSE;
697 }
698 }
699
700 /**
701 * Test if the given format is a SNORM (signed-normalized) format.
702 */
703 GLboolean
704 _mesa_is_enum_format_snorm(GLenum format)
705 {
706 switch (format) {
707 /* signed, normalized texture formats */
708 case GL_RED_SNORM:
709 case GL_R8_SNORM:
710 case GL_R16_SNORM:
711 case GL_RG_SNORM:
712 case GL_RG8_SNORM:
713 case GL_RG16_SNORM:
714 case GL_RGB_SNORM:
715 case GL_RGB8_SNORM:
716 case GL_RGB16_SNORM:
717 case GL_RGBA_SNORM:
718 case GL_RGBA8_SNORM:
719 case GL_RGBA16_SNORM:
720 case GL_ALPHA_SNORM:
721 case GL_ALPHA8_SNORM:
722 case GL_ALPHA16_SNORM:
723 case GL_LUMINANCE_SNORM:
724 case GL_LUMINANCE8_SNORM:
725 case GL_LUMINANCE16_SNORM:
726 case GL_LUMINANCE_ALPHA_SNORM:
727 case GL_LUMINANCE8_ALPHA8_SNORM:
728 case GL_LUMINANCE16_ALPHA16_SNORM:
729 case GL_INTENSITY_SNORM:
730 case GL_INTENSITY8_SNORM:
731 case GL_INTENSITY16_SNORM:
732 return GL_TRUE;
733 default:
734 return GL_FALSE;
735 }
736 }
737
738 /**
739 * Test if the given format is an integer (non-normalized) format.
740 */
741 GLboolean
742 _mesa_is_enum_format_unsigned_int(GLenum format)
743 {
744 switch (format) {
745 /* specific integer formats */
746 case GL_RGBA32UI_EXT:
747 case GL_RGB32UI_EXT:
748 case GL_RG32UI:
749 case GL_R32UI:
750 case GL_ALPHA32UI_EXT:
751 case GL_INTENSITY32UI_EXT:
752 case GL_LUMINANCE32UI_EXT:
753 case GL_LUMINANCE_ALPHA32UI_EXT:
754 case GL_RGBA16UI_EXT:
755 case GL_RGB16UI_EXT:
756 case GL_RG16UI:
757 case GL_R16UI:
758 case GL_ALPHA16UI_EXT:
759 case GL_INTENSITY16UI_EXT:
760 case GL_LUMINANCE16UI_EXT:
761 case GL_LUMINANCE_ALPHA16UI_EXT:
762 case GL_RGBA8UI_EXT:
763 case GL_RGB8UI_EXT:
764 case GL_RG8UI:
765 case GL_R8UI:
766 case GL_ALPHA8UI_EXT:
767 case GL_INTENSITY8UI_EXT:
768 case GL_LUMINANCE8UI_EXT:
769 case GL_LUMINANCE_ALPHA8UI_EXT:
770 case GL_RGB10_A2UI:
771 return GL_TRUE;
772 default:
773 return GL_FALSE;
774 }
775 }
776
777
778 /**
779 * Test if the given format is an integer (non-normalized) format.
780 */
781 GLboolean
782 _mesa_is_enum_format_signed_int(GLenum format)
783 {
784 switch (format) {
785 /* generic integer formats */
786 case GL_RED_INTEGER_EXT:
787 case GL_GREEN_INTEGER_EXT:
788 case GL_BLUE_INTEGER_EXT:
789 case GL_ALPHA_INTEGER_EXT:
790 case GL_RGB_INTEGER_EXT:
791 case GL_RGBA_INTEGER_EXT:
792 case GL_BGR_INTEGER_EXT:
793 case GL_BGRA_INTEGER_EXT:
794 case GL_LUMINANCE_INTEGER_EXT:
795 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
796 case GL_RG_INTEGER:
797 /* specific integer formats */
798 case GL_RGBA32I_EXT:
799 case GL_RGB32I_EXT:
800 case GL_RG32I:
801 case GL_R32I:
802 case GL_ALPHA32I_EXT:
803 case GL_INTENSITY32I_EXT:
804 case GL_LUMINANCE32I_EXT:
805 case GL_LUMINANCE_ALPHA32I_EXT:
806 case GL_RGBA16I_EXT:
807 case GL_RGB16I_EXT:
808 case GL_RG16I:
809 case GL_R16I:
810 case GL_ALPHA16I_EXT:
811 case GL_INTENSITY16I_EXT:
812 case GL_LUMINANCE16I_EXT:
813 case GL_LUMINANCE_ALPHA16I_EXT:
814 case GL_RGBA8I_EXT:
815 case GL_RGB8I_EXT:
816 case GL_RG8I:
817 case GL_R8I:
818 case GL_ALPHA8I_EXT:
819 case GL_INTENSITY8I_EXT:
820 case GL_LUMINANCE8I_EXT:
821 case GL_LUMINANCE_ALPHA8I_EXT:
822 return GL_TRUE;
823 default:
824 return GL_FALSE;
825 }
826 }
827
828 /**
829 * Test if the given format is an ASTC 2D format.
830 */
831 static bool
832 is_astc_2d_format(GLenum internalFormat)
833 {
834 switch (internalFormat) {
835 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
844 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
845 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
846 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
847 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
848 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
858 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
859 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
860 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
861 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
862 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
863 return true;
864 default:
865 return false;
866 }
867 }
868
869 /**
870 * Test if the given format is an ASTC 3D format.
871 */
872 static bool
873 is_astc_3d_format(GLenum internalFormat)
874 {
875 switch (internalFormat) {
876 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
877 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
878 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
879 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
880 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
881 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
882 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
883 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
884 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
885 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
886 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
887 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
888 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
889 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
890 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
891 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
892 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
893 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
894 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
895 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
896 return true;
897 default:
898 return false;
899 }
900 }
901
902 /**
903 * Test if the given format is an ASTC format.
904 */
905 GLboolean
906 _mesa_is_astc_format(GLenum internalFormat)
907 {
908 return is_astc_2d_format(internalFormat) ||
909 is_astc_3d_format(internalFormat);
910 }
911
912 /**
913 * Test if the given format is an ETC2 format.
914 */
915 GLboolean
916 _mesa_is_etc2_format(GLenum internalFormat)
917 {
918 switch (internalFormat) {
919 case GL_COMPRESSED_RGB8_ETC2:
920 case GL_COMPRESSED_SRGB8_ETC2:
921 case GL_COMPRESSED_RGBA8_ETC2_EAC:
922 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
923 case GL_COMPRESSED_R11_EAC:
924 case GL_COMPRESSED_RG11_EAC:
925 case GL_COMPRESSED_SIGNED_R11_EAC:
926 case GL_COMPRESSED_SIGNED_RG11_EAC:
927 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
928 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
929 return true;
930 default:
931 return false;
932 }
933 }
934
935 /**
936 * Test if the given format is an integer (non-normalized) format.
937 */
938 GLboolean
939 _mesa_is_enum_format_integer(GLenum format)
940 {
941 return _mesa_is_enum_format_unsigned_int(format) ||
942 _mesa_is_enum_format_signed_int(format);
943 }
944
945
946 GLboolean
947 _mesa_is_type_unsigned(GLenum type)
948 {
949 switch (type) {
950 case GL_UNSIGNED_INT:
951 case GL_UNSIGNED_INT_8_8_8_8:
952 case GL_UNSIGNED_INT_8_8_8_8_REV:
953 case GL_UNSIGNED_INT_10_10_10_2:
954 case GL_UNSIGNED_INT_2_10_10_10_REV:
955
956 case GL_UNSIGNED_SHORT:
957 case GL_UNSIGNED_SHORT_4_4_4_4:
958 case GL_UNSIGNED_SHORT_5_5_5_1:
959 case GL_UNSIGNED_SHORT_5_6_5:
960 case GL_UNSIGNED_SHORT_5_6_5_REV:
961 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
962 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
963 case GL_UNSIGNED_SHORT_8_8_MESA:
964 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
965
966 case GL_UNSIGNED_BYTE:
967 case GL_UNSIGNED_BYTE_3_3_2:
968 case GL_UNSIGNED_BYTE_2_3_3_REV:
969 return GL_TRUE;
970
971 default:
972 return GL_FALSE;
973 }
974 }
975
976
977 /**
978 * Test if the given image format is a color/RGBA format (i.e., not color
979 * index, depth, stencil, etc).
980 * \param format the image format value (may by an internal texture format)
981 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
982 */
983 GLboolean
984 _mesa_is_color_format(GLenum format)
985 {
986 switch (format) {
987 case GL_RED:
988 case GL_GREEN:
989 case GL_BLUE:
990 case GL_ALPHA:
991 case GL_ALPHA4:
992 case GL_ALPHA8:
993 case GL_ALPHA12:
994 case GL_ALPHA16:
995 case 1:
996 case GL_LUMINANCE:
997 case GL_LUMINANCE4:
998 case GL_LUMINANCE8:
999 case GL_LUMINANCE12:
1000 case GL_LUMINANCE16:
1001 case 2:
1002 case GL_LUMINANCE_ALPHA:
1003 case GL_LUMINANCE4_ALPHA4:
1004 case GL_LUMINANCE6_ALPHA2:
1005 case GL_LUMINANCE8_ALPHA8:
1006 case GL_LUMINANCE12_ALPHA4:
1007 case GL_LUMINANCE12_ALPHA12:
1008 case GL_LUMINANCE16_ALPHA16:
1009 case GL_INTENSITY:
1010 case GL_INTENSITY4:
1011 case GL_INTENSITY8:
1012 case GL_INTENSITY12:
1013 case GL_INTENSITY16:
1014 case GL_R8:
1015 case GL_R16:
1016 case GL_RG:
1017 case GL_RG8:
1018 case GL_RG16:
1019 case 3:
1020 case GL_RGB:
1021 case GL_BGR:
1022 case GL_R3_G3_B2:
1023 case GL_RGB4:
1024 case GL_RGB5:
1025 case GL_RGB565:
1026 case GL_RGB8:
1027 case GL_RGB10:
1028 case GL_RGB12:
1029 case GL_RGB16:
1030 case 4:
1031 case GL_ABGR_EXT:
1032 case GL_RGBA:
1033 case GL_BGRA:
1034 case GL_RGBA2:
1035 case GL_RGBA4:
1036 case GL_RGB5_A1:
1037 case GL_RGBA8:
1038 case GL_RGB10_A2:
1039 case GL_RGBA12:
1040 case GL_RGBA16:
1041 /* float texture formats */
1042 case GL_ALPHA16F_ARB:
1043 case GL_ALPHA32F_ARB:
1044 case GL_LUMINANCE16F_ARB:
1045 case GL_LUMINANCE32F_ARB:
1046 case GL_LUMINANCE_ALPHA16F_ARB:
1047 case GL_LUMINANCE_ALPHA32F_ARB:
1048 case GL_INTENSITY16F_ARB:
1049 case GL_INTENSITY32F_ARB:
1050 case GL_R16F:
1051 case GL_R32F:
1052 case GL_RG16F:
1053 case GL_RG32F:
1054 case GL_RGB16F_ARB:
1055 case GL_RGB32F_ARB:
1056 case GL_RGBA16F_ARB:
1057 case GL_RGBA32F_ARB:
1058 /* compressed formats */
1059 case GL_COMPRESSED_ALPHA:
1060 case GL_COMPRESSED_LUMINANCE:
1061 case GL_COMPRESSED_LUMINANCE_ALPHA:
1062 case GL_COMPRESSED_INTENSITY:
1063 case GL_COMPRESSED_RED:
1064 case GL_COMPRESSED_RG:
1065 case GL_COMPRESSED_RGB:
1066 case GL_COMPRESSED_RGBA:
1067 case GL_RGB_S3TC:
1068 case GL_RGB4_S3TC:
1069 case GL_RGBA_S3TC:
1070 case GL_RGBA4_S3TC:
1071 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1072 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1073 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1074 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1075 case GL_COMPRESSED_RGB_FXT1_3DFX:
1076 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1077 case GL_SRGB_EXT:
1078 case GL_SRGB8_EXT:
1079 case GL_SRGB_ALPHA_EXT:
1080 case GL_SRGB8_ALPHA8_EXT:
1081 case GL_SLUMINANCE_ALPHA_EXT:
1082 case GL_SLUMINANCE8_ALPHA8_EXT:
1083 case GL_SLUMINANCE_EXT:
1084 case GL_SLUMINANCE8_EXT:
1085 case GL_COMPRESSED_SRGB_EXT:
1086 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1087 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1088 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1089 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1090 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1091 case GL_COMPRESSED_SLUMINANCE_EXT:
1092 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1093 case GL_COMPRESSED_RED_RGTC1:
1094 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1095 case GL_COMPRESSED_RG_RGTC2:
1096 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1097 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1098 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1099 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1100 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1101 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1102 case GL_ETC1_RGB8_OES:
1103 case GL_COMPRESSED_RGB8_ETC2:
1104 case GL_COMPRESSED_SRGB8_ETC2:
1105 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1106 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1107 case GL_COMPRESSED_R11_EAC:
1108 case GL_COMPRESSED_RG11_EAC:
1109 case GL_COMPRESSED_SIGNED_R11_EAC:
1110 case GL_COMPRESSED_SIGNED_RG11_EAC:
1111 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1112 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1113 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1114 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1115 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1116 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1117 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1118 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1119 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1120 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1121 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1122 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1123 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1124 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1125 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1126 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1127 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1128 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1129 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1130 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1131 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1132 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1133 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1134 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1135 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1136 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1137 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1138 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1139 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1140 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1141 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1142 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1143 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1144 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1145 /* generic integer formats */
1146 case GL_RED_INTEGER_EXT:
1147 case GL_GREEN_INTEGER_EXT:
1148 case GL_BLUE_INTEGER_EXT:
1149 case GL_ALPHA_INTEGER_EXT:
1150 case GL_RGB_INTEGER_EXT:
1151 case GL_RGBA_INTEGER_EXT:
1152 case GL_BGR_INTEGER_EXT:
1153 case GL_BGRA_INTEGER_EXT:
1154 case GL_RG_INTEGER:
1155 case GL_LUMINANCE_INTEGER_EXT:
1156 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1157 /* sized integer formats */
1158 case GL_RGBA32UI_EXT:
1159 case GL_RGB32UI_EXT:
1160 case GL_RG32UI:
1161 case GL_R32UI:
1162 case GL_ALPHA32UI_EXT:
1163 case GL_INTENSITY32UI_EXT:
1164 case GL_LUMINANCE32UI_EXT:
1165 case GL_LUMINANCE_ALPHA32UI_EXT:
1166 case GL_RGBA16UI_EXT:
1167 case GL_RGB16UI_EXT:
1168 case GL_RG16UI:
1169 case GL_R16UI:
1170 case GL_ALPHA16UI_EXT:
1171 case GL_INTENSITY16UI_EXT:
1172 case GL_LUMINANCE16UI_EXT:
1173 case GL_LUMINANCE_ALPHA16UI_EXT:
1174 case GL_RGBA8UI_EXT:
1175 case GL_RGB8UI_EXT:
1176 case GL_RG8UI:
1177 case GL_R8UI:
1178 case GL_ALPHA8UI_EXT:
1179 case GL_INTENSITY8UI_EXT:
1180 case GL_LUMINANCE8UI_EXT:
1181 case GL_LUMINANCE_ALPHA8UI_EXT:
1182 case GL_RGBA32I_EXT:
1183 case GL_RGB32I_EXT:
1184 case GL_RG32I:
1185 case GL_R32I:
1186 case GL_ALPHA32I_EXT:
1187 case GL_INTENSITY32I_EXT:
1188 case GL_LUMINANCE32I_EXT:
1189 case GL_LUMINANCE_ALPHA32I_EXT:
1190 case GL_RGBA16I_EXT:
1191 case GL_RGB16I_EXT:
1192 case GL_RG16I:
1193 case GL_R16I:
1194 case GL_ALPHA16I_EXT:
1195 case GL_INTENSITY16I_EXT:
1196 case GL_LUMINANCE16I_EXT:
1197 case GL_LUMINANCE_ALPHA16I_EXT:
1198 case GL_RGBA8I_EXT:
1199 case GL_RGB8I_EXT:
1200 case GL_RG8I:
1201 case GL_R8I:
1202 case GL_ALPHA8I_EXT:
1203 case GL_INTENSITY8I_EXT:
1204 case GL_LUMINANCE8I_EXT:
1205 case GL_LUMINANCE_ALPHA8I_EXT:
1206 /* signed, normalized texture formats */
1207 case GL_RED_SNORM:
1208 case GL_R8_SNORM:
1209 case GL_R16_SNORM:
1210 case GL_RG_SNORM:
1211 case GL_RG8_SNORM:
1212 case GL_RG16_SNORM:
1213 case GL_RGB_SNORM:
1214 case GL_RGB8_SNORM:
1215 case GL_RGB16_SNORM:
1216 case GL_RGBA_SNORM:
1217 case GL_RGBA8_SNORM:
1218 case GL_RGBA16_SNORM:
1219 case GL_ALPHA_SNORM:
1220 case GL_ALPHA8_SNORM:
1221 case GL_ALPHA16_SNORM:
1222 case GL_LUMINANCE_SNORM:
1223 case GL_LUMINANCE8_SNORM:
1224 case GL_LUMINANCE16_SNORM:
1225 case GL_LUMINANCE_ALPHA_SNORM:
1226 case GL_LUMINANCE8_ALPHA8_SNORM:
1227 case GL_LUMINANCE16_ALPHA16_SNORM:
1228 case GL_INTENSITY_SNORM:
1229 case GL_INTENSITY8_SNORM:
1230 case GL_INTENSITY16_SNORM:
1231 case GL_RGB9_E5:
1232 case GL_R11F_G11F_B10F:
1233 case GL_RGB10_A2UI:
1234 return GL_TRUE;
1235 case GL_YCBCR_MESA: /* not considered to be RGB */
1236 /* fall-through */
1237 default:
1238 return GL_FALSE;
1239 }
1240 }
1241
1242
1243 /**
1244 * Test if the given image format is a depth component format.
1245 */
1246 GLboolean
1247 _mesa_is_depth_format(GLenum format)
1248 {
1249 switch (format) {
1250 case GL_DEPTH_COMPONENT:
1251 case GL_DEPTH_COMPONENT16:
1252 case GL_DEPTH_COMPONENT24:
1253 case GL_DEPTH_COMPONENT32:
1254 case GL_DEPTH_COMPONENT32F:
1255 return GL_TRUE;
1256 default:
1257 return GL_FALSE;
1258 }
1259 }
1260
1261
1262 /**
1263 * Test if the given image format is a stencil format.
1264 */
1265 GLboolean
1266 _mesa_is_stencil_format(GLenum format)
1267 {
1268 switch (format) {
1269 case GL_STENCIL_INDEX:
1270 return GL_TRUE;
1271 default:
1272 return GL_FALSE;
1273 }
1274 }
1275
1276
1277 /**
1278 * Test if the given image format is a YCbCr format.
1279 */
1280 GLboolean
1281 _mesa_is_ycbcr_format(GLenum format)
1282 {
1283 switch (format) {
1284 case GL_YCBCR_MESA:
1285 return GL_TRUE;
1286 default:
1287 return GL_FALSE;
1288 }
1289 }
1290
1291
1292 /**
1293 * Test if the given image format is a depth+stencil format.
1294 */
1295 GLboolean
1296 _mesa_is_depthstencil_format(GLenum format)
1297 {
1298 switch (format) {
1299 case GL_DEPTH24_STENCIL8_EXT:
1300 case GL_DEPTH_STENCIL_EXT:
1301 case GL_DEPTH32F_STENCIL8:
1302 return GL_TRUE;
1303 default:
1304 return GL_FALSE;
1305 }
1306 }
1307
1308
1309 /**
1310 * Test if the given image format is a depth or stencil format.
1311 */
1312 GLboolean
1313 _mesa_is_depth_or_stencil_format(GLenum format)
1314 {
1315 switch (format) {
1316 case GL_DEPTH_COMPONENT:
1317 case GL_DEPTH_COMPONENT16:
1318 case GL_DEPTH_COMPONENT24:
1319 case GL_DEPTH_COMPONENT32:
1320 case GL_STENCIL_INDEX:
1321 case GL_STENCIL_INDEX1_EXT:
1322 case GL_STENCIL_INDEX4_EXT:
1323 case GL_STENCIL_INDEX8_EXT:
1324 case GL_STENCIL_INDEX16_EXT:
1325 case GL_DEPTH_STENCIL_EXT:
1326 case GL_DEPTH24_STENCIL8_EXT:
1327 case GL_DEPTH_COMPONENT32F:
1328 case GL_DEPTH32F_STENCIL8:
1329 return GL_TRUE;
1330 default:
1331 return GL_FALSE;
1332 }
1333 }
1334
1335
1336 /**
1337 * Test if an image format is a supported compressed format.
1338 * \param format the internal format token provided by the user.
1339 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1340 */
1341 GLboolean
1342 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1343 {
1344 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1345
1346 /* Some formats in this switch have an equivalent mesa_format_layout
1347 * to the compressed formats in the layout switch below and thus
1348 * must be handled first.
1349 */
1350 switch (format) {
1351 case GL_RGB_S3TC:
1352 case GL_RGB4_S3TC:
1353 case GL_RGBA_S3TC:
1354 case GL_RGBA4_S3TC:
1355 return _mesa_is_desktop_gl(ctx) &&
1356 ctx->Extensions.ANGLE_texture_compression_dxt;
1357 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1358 return ctx->API == API_OPENGL_COMPAT
1359 && ctx->Extensions.ATI_texture_compression_3dc;
1360 case GL_PALETTE4_RGB8_OES:
1361 case GL_PALETTE4_RGBA8_OES:
1362 case GL_PALETTE4_R5_G6_B5_OES:
1363 case GL_PALETTE4_RGBA4_OES:
1364 case GL_PALETTE4_RGB5_A1_OES:
1365 case GL_PALETTE8_RGB8_OES:
1366 case GL_PALETTE8_RGBA8_OES:
1367 case GL_PALETTE8_R5_G6_B5_OES:
1368 case GL_PALETTE8_RGBA4_OES:
1369 case GL_PALETTE8_RGB5_A1_OES:
1370 return ctx->API == API_OPENGLES;
1371 }
1372
1373 switch (_mesa_get_format_layout(m_format)) {
1374 case MESA_FORMAT_LAYOUT_S3TC:
1375 if (_mesa_get_format_color_encoding(m_format) == GL_LINEAR) {
1376 /* Assume that the ANGLE flag will always be set if the
1377 * EXT flag is set.
1378 */
1379 return ctx->Extensions.ANGLE_texture_compression_dxt;
1380 } else {
1381 return _mesa_is_desktop_gl(ctx)
1382 && ctx->Extensions.EXT_texture_sRGB
1383 && ctx->Extensions.EXT_texture_compression_s3tc;
1384 }
1385 case MESA_FORMAT_LAYOUT_FXT1:
1386 return _mesa_is_desktop_gl(ctx)
1387 && ctx->Extensions.TDFX_texture_compression_FXT1;
1388 case MESA_FORMAT_LAYOUT_RGTC:
1389 return _mesa_is_desktop_gl(ctx)
1390 && ctx->Extensions.ARB_texture_compression_rgtc;
1391 case MESA_FORMAT_LAYOUT_LATC:
1392 return ctx->API == API_OPENGL_COMPAT
1393 && ctx->Extensions.EXT_texture_compression_latc;
1394 case MESA_FORMAT_LAYOUT_ETC1:
1395 return _mesa_is_gles(ctx)
1396 && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
1397 case MESA_FORMAT_LAYOUT_ETC2:
1398 return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
1399 case MESA_FORMAT_LAYOUT_BPTC:
1400 return _mesa_is_desktop_gl(ctx) &&
1401 ctx->Extensions.ARB_texture_compression_bptc;
1402 case MESA_FORMAT_LAYOUT_ASTC:
1403 return ctx->Extensions.KHR_texture_compression_astc_ldr;
1404 default:
1405 return GL_FALSE;
1406 }
1407 }
1408
1409 /**
1410 * Test if the given format represents an sRGB format.
1411 * \param format the GL format (can be an internal format)
1412 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1413 */
1414 GLboolean
1415 _mesa_is_srgb_format(GLenum format)
1416 {
1417 switch (format) {
1418 case GL_SRGB:
1419 case GL_SRGB8:
1420 case GL_SRGB_ALPHA:
1421 case GL_SRGB8_ALPHA8:
1422 case GL_COMPRESSED_SRGB:
1423 case GL_COMPRESSED_SRGB_ALPHA:
1424 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1425 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1426 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1427 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1428 case GL_COMPRESSED_SRGB8_ETC2:
1429 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1430 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1431 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1432 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1433 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1434 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1435 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1436 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1437 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1438 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1439 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1440 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1441 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1442 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1443 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1444 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1445 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1446 return GL_TRUE;
1447 default:
1448 break;
1449 }
1450
1451 return GL_FALSE;
1452 }
1453
1454 /**
1455 * Convert various unpack formats to the corresponding base format.
1456 */
1457 GLenum
1458 _mesa_unpack_format_to_base_format(GLenum format)
1459 {
1460 switch(format) {
1461 case GL_RED_INTEGER:
1462 return GL_RED;
1463 case GL_GREEN_INTEGER:
1464 return GL_GREEN;
1465 case GL_BLUE_INTEGER:
1466 return GL_BLUE;
1467 case GL_ALPHA_INTEGER:
1468 return GL_ALPHA;
1469 case GL_RG_INTEGER:
1470 return GL_RG;
1471 case GL_RGB_INTEGER:
1472 return GL_RGB;
1473 case GL_RGBA_INTEGER:
1474 return GL_RGBA;
1475 case GL_BGR_INTEGER:
1476 return GL_BGR;
1477 case GL_BGRA_INTEGER:
1478 return GL_BGRA;
1479 case GL_LUMINANCE_INTEGER_EXT:
1480 return GL_LUMINANCE;
1481 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1482 return GL_LUMINANCE_ALPHA;
1483 case GL_RED:
1484 case GL_GREEN:
1485 case GL_BLUE:
1486 case GL_RG:
1487 case GL_RGB:
1488 case GL_RGBA:
1489 case GL_BGR:
1490 case GL_BGRA:
1491 case GL_ALPHA:
1492 case GL_LUMINANCE:
1493 case GL_LUMINANCE_ALPHA:
1494 default:
1495 return format;
1496 }
1497 }
1498
1499 /**
1500 * Convert various base formats to the corresponding integer format.
1501 */
1502 GLenum
1503 _mesa_base_format_to_integer_format(GLenum format)
1504 {
1505 switch(format) {
1506 case GL_RED:
1507 return GL_RED_INTEGER;
1508 case GL_GREEN:
1509 return GL_GREEN_INTEGER;
1510 case GL_BLUE:
1511 return GL_BLUE_INTEGER;
1512 case GL_RG:
1513 return GL_RG_INTEGER;
1514 case GL_RGB:
1515 return GL_RGB_INTEGER;
1516 case GL_RGBA:
1517 return GL_RGBA_INTEGER;
1518 case GL_BGR:
1519 return GL_BGR_INTEGER;
1520 case GL_BGRA:
1521 return GL_BGRA_INTEGER;
1522 case GL_ALPHA:
1523 return GL_ALPHA_INTEGER;
1524 case GL_LUMINANCE:
1525 return GL_LUMINANCE_INTEGER_EXT;
1526 case GL_LUMINANCE_ALPHA:
1527 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1528 }
1529
1530 return format;
1531 }
1532
1533
1534 /**
1535 * Does the given base texture/renderbuffer format have the channel
1536 * named by 'pname'?
1537 */
1538 GLboolean
1539 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1540 {
1541 switch (pname) {
1542 case GL_TEXTURE_RED_SIZE:
1543 case GL_TEXTURE_RED_TYPE:
1544 case GL_RENDERBUFFER_RED_SIZE_EXT:
1545 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1546 case GL_INTERNALFORMAT_RED_SIZE:
1547 case GL_INTERNALFORMAT_RED_TYPE:
1548 if (base_format == GL_RED ||
1549 base_format == GL_RG ||
1550 base_format == GL_RGB ||
1551 base_format == GL_RGBA) {
1552 return GL_TRUE;
1553 }
1554 return GL_FALSE;
1555 case GL_TEXTURE_GREEN_SIZE:
1556 case GL_TEXTURE_GREEN_TYPE:
1557 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1558 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1559 case GL_INTERNALFORMAT_GREEN_SIZE:
1560 case GL_INTERNALFORMAT_GREEN_TYPE:
1561 if (base_format == GL_RG ||
1562 base_format == GL_RGB ||
1563 base_format == GL_RGBA) {
1564 return GL_TRUE;
1565 }
1566 return GL_FALSE;
1567 case GL_TEXTURE_BLUE_SIZE:
1568 case GL_TEXTURE_BLUE_TYPE:
1569 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1570 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1571 case GL_INTERNALFORMAT_BLUE_SIZE:
1572 case GL_INTERNALFORMAT_BLUE_TYPE:
1573 if (base_format == GL_RGB ||
1574 base_format == GL_RGBA) {
1575 return GL_TRUE;
1576 }
1577 return GL_FALSE;
1578 case GL_TEXTURE_ALPHA_SIZE:
1579 case GL_TEXTURE_ALPHA_TYPE:
1580 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1581 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1582 case GL_INTERNALFORMAT_ALPHA_SIZE:
1583 case GL_INTERNALFORMAT_ALPHA_TYPE:
1584 if (base_format == GL_RGBA ||
1585 base_format == GL_ALPHA ||
1586 base_format == GL_LUMINANCE_ALPHA) {
1587 return GL_TRUE;
1588 }
1589 return GL_FALSE;
1590 case GL_TEXTURE_LUMINANCE_SIZE:
1591 case GL_TEXTURE_LUMINANCE_TYPE:
1592 if (base_format == GL_LUMINANCE ||
1593 base_format == GL_LUMINANCE_ALPHA) {
1594 return GL_TRUE;
1595 }
1596 return GL_FALSE;
1597 case GL_TEXTURE_INTENSITY_SIZE:
1598 case GL_TEXTURE_INTENSITY_TYPE:
1599 if (base_format == GL_INTENSITY) {
1600 return GL_TRUE;
1601 }
1602 return GL_FALSE;
1603 case GL_TEXTURE_DEPTH_SIZE:
1604 case GL_TEXTURE_DEPTH_TYPE:
1605 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1606 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1607 case GL_INTERNALFORMAT_DEPTH_SIZE:
1608 case GL_INTERNALFORMAT_DEPTH_TYPE:
1609 if (base_format == GL_DEPTH_STENCIL ||
1610 base_format == GL_DEPTH_COMPONENT) {
1611 return GL_TRUE;
1612 }
1613 return GL_FALSE;
1614 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1615 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1616 case GL_INTERNALFORMAT_STENCIL_SIZE:
1617 case GL_INTERNALFORMAT_STENCIL_TYPE:
1618 if (base_format == GL_DEPTH_STENCIL ||
1619 base_format == GL_STENCIL_INDEX) {
1620 return GL_TRUE;
1621 }
1622 return GL_FALSE;
1623 default:
1624 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1625 __func__, pname);
1626 return GL_FALSE;
1627 }
1628
1629 return GL_FALSE;
1630 }
1631
1632
1633 /**
1634 * Returns the number of channels/components for a base format.
1635 */
1636 GLint
1637 _mesa_base_format_component_count(GLenum base_format)
1638 {
1639 switch (base_format) {
1640 case GL_LUMINANCE:
1641 case GL_RED:
1642 case GL_ALPHA:
1643 case GL_INTENSITY:
1644 case GL_DEPTH_COMPONENT:
1645 return 1;
1646 case GL_RG:
1647 case GL_LUMINANCE_ALPHA:
1648 case GL_DEPTH_STENCIL:
1649 return 2;
1650 case GL_RGB:
1651 return 3;
1652 case GL_RGBA:
1653 return 4;
1654 default:
1655 return -1;
1656 }
1657 }
1658
1659
1660 /**
1661 * If format is a generic compressed format, return the corresponding
1662 * non-compressed format. For other formats, return the format as-is.
1663 */
1664 GLenum
1665 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1666 {
1667 switch (format) {
1668 case GL_COMPRESSED_RED:
1669 return GL_RED;
1670 case GL_COMPRESSED_RG:
1671 return GL_RG;
1672 case GL_COMPRESSED_RGB:
1673 return GL_RGB;
1674 case GL_COMPRESSED_RGBA:
1675 return GL_RGBA;
1676 case GL_COMPRESSED_ALPHA:
1677 return GL_ALPHA;
1678 case GL_COMPRESSED_LUMINANCE:
1679 return GL_LUMINANCE;
1680 case GL_COMPRESSED_LUMINANCE_ALPHA:
1681 return GL_LUMINANCE_ALPHA;
1682 case GL_COMPRESSED_INTENSITY:
1683 return GL_INTENSITY;
1684 /* sRGB formats */
1685 case GL_COMPRESSED_SRGB:
1686 return GL_SRGB;
1687 case GL_COMPRESSED_SRGB_ALPHA:
1688 return GL_SRGB_ALPHA;
1689 case GL_COMPRESSED_SLUMINANCE:
1690 return GL_SLUMINANCE;
1691 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1692 return GL_SLUMINANCE_ALPHA;
1693 default:
1694 return format;
1695 }
1696 }
1697
1698
1699 /**
1700 * Return the equivalent non-generic internal format.
1701 * This is useful for comparing whether two internal formats are equivalent.
1702 */
1703 GLenum
1704 _mesa_get_nongeneric_internalformat(GLenum format)
1705 {
1706 switch (format) {
1707 /* GL 1.1 formats. */
1708 case 4:
1709 case GL_RGBA:
1710 return GL_RGBA8;
1711 case 3:
1712 case GL_RGB:
1713 return GL_RGB8;
1714 case 2:
1715 case GL_LUMINANCE_ALPHA:
1716 return GL_LUMINANCE8_ALPHA8;
1717 case 1:
1718 case GL_LUMINANCE:
1719 return GL_LUMINANCE8;
1720 case GL_ALPHA:
1721 return GL_ALPHA8;
1722 case GL_INTENSITY:
1723 return GL_INTENSITY8;
1724
1725 /* GL_ARB_texture_rg */
1726 case GL_RED:
1727 return GL_R8;
1728 case GL_RG:
1729 return GL_RG8;
1730
1731 /* GL_EXT_texture_sRGB */
1732 case GL_SRGB:
1733 return GL_SRGB8;
1734 case GL_SRGB_ALPHA:
1735 return GL_SRGB8_ALPHA8;
1736 case GL_SLUMINANCE:
1737 return GL_SLUMINANCE8;
1738 case GL_SLUMINANCE_ALPHA:
1739 return GL_SLUMINANCE8_ALPHA8;
1740
1741 /* GL_EXT_texture_snorm */
1742 case GL_RGBA_SNORM:
1743 return GL_RGBA8_SNORM;
1744 case GL_RGB_SNORM:
1745 return GL_RGB8_SNORM;
1746 case GL_RG_SNORM:
1747 return GL_RG8_SNORM;
1748 case GL_RED_SNORM:
1749 return GL_R8_SNORM;
1750 case GL_LUMINANCE_ALPHA_SNORM:
1751 return GL_LUMINANCE8_ALPHA8_SNORM;
1752 case GL_LUMINANCE_SNORM:
1753 return GL_LUMINANCE8_SNORM;
1754 case GL_ALPHA_SNORM:
1755 return GL_ALPHA8_SNORM;
1756 case GL_INTENSITY_SNORM:
1757 return GL_INTENSITY8_SNORM;
1758
1759 default:
1760 return format;
1761 }
1762 }
1763
1764
1765 /**
1766 * Convert an sRGB internal format to linear.
1767 */
1768 GLenum
1769 _mesa_get_linear_internalformat(GLenum format)
1770 {
1771 switch (format) {
1772 case GL_SRGB:
1773 return GL_RGB;
1774 case GL_SRGB_ALPHA:
1775 return GL_RGBA;
1776 case GL_SRGB8:
1777 return GL_RGB8;
1778 case GL_SRGB8_ALPHA8:
1779 return GL_RGBA8;
1780 case GL_SLUMINANCE8:
1781 return GL_LUMINANCE8;
1782 case GL_SLUMINANCE:
1783 return GL_LUMINANCE;
1784 case GL_SLUMINANCE_ALPHA:
1785 return GL_LUMINANCE_ALPHA;
1786 case GL_SLUMINANCE8_ALPHA8:
1787 return GL_LUMINANCE8_ALPHA8;
1788 default:
1789 return format;
1790 }
1791 }
1792
1793
1794 /**
1795 * Do error checking of format/type combinations for glReadPixels,
1796 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1797 * and type values, we may either generate GL_INVALID_OPERATION or
1798 * GL_INVALID_ENUM.
1799 *
1800 * \param format pixel format.
1801 * \param type pixel type.
1802 *
1803 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1804 */
1805 GLenum
1806 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1807 GLenum format, GLenum type)
1808 {
1809 /* From OpenGL 3.3 spec, page 220:
1810 * "If the format is DEPTH_STENCIL, then values are taken from
1811 * both the depth buffer and the stencil buffer. If there is no
1812 * depth buffer or if there is no stencil buffer, then the error
1813 * INVALID_OPERATION occurs. If the type parameter is not
1814 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1815 * error INVALID_ENUM occurs."
1816 *
1817 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1818 * cannot be used to read depth or stencil in that API.
1819 */
1820 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1821 && type != GL_UNSIGNED_INT_24_8
1822 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1823 return GL_INVALID_ENUM;
1824
1825 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1826 switch (type) {
1827 case GL_BITMAP:
1828 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1829 return GL_INVALID_ENUM;
1830 }
1831 break;
1832
1833 case GL_UNSIGNED_BYTE_3_3_2:
1834 case GL_UNSIGNED_BYTE_2_3_3_REV:
1835 case GL_UNSIGNED_SHORT_5_6_5:
1836 case GL_UNSIGNED_SHORT_5_6_5_REV:
1837 if (format == GL_RGB) {
1838 break; /* OK */
1839 }
1840 if (format == GL_RGB_INTEGER_EXT &&
1841 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1842 break; /* OK */
1843 }
1844 return GL_INVALID_OPERATION;
1845
1846 case GL_UNSIGNED_SHORT_4_4_4_4:
1847 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1848 case GL_UNSIGNED_INT_8_8_8_8:
1849 case GL_UNSIGNED_INT_8_8_8_8_REV:
1850 if (format == GL_RGBA ||
1851 format == GL_BGRA ||
1852 format == GL_ABGR_EXT) {
1853 break; /* OK */
1854 }
1855 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1856 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1857 break; /* OK */
1858 }
1859 return GL_INVALID_OPERATION;
1860
1861 case GL_UNSIGNED_SHORT_5_5_5_1:
1862 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1863 case GL_UNSIGNED_INT_10_10_10_2:
1864 case GL_UNSIGNED_INT_2_10_10_10_REV:
1865 if (format == GL_RGBA ||
1866 format == GL_BGRA) {
1867 break; /* OK */
1868 }
1869 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1870 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1871 break; /* OK */
1872 }
1873 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1874 ctx->API == API_OPENGLES2) {
1875 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1876 }
1877 return GL_INVALID_OPERATION;
1878
1879 case GL_UNSIGNED_INT_24_8:
1880 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1881 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1882 return GL_NO_ERROR;
1883
1884 if (format != GL_DEPTH_STENCIL) {
1885 return GL_INVALID_OPERATION;
1886 }
1887 return GL_NO_ERROR;
1888
1889 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1890 if (!ctx->Extensions.ARB_depth_buffer_float) {
1891 return GL_INVALID_ENUM;
1892 }
1893 if (format != GL_DEPTH_STENCIL) {
1894 return GL_INVALID_OPERATION;
1895 }
1896 return GL_NO_ERROR;
1897
1898 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1899 if (!ctx->Extensions.EXT_packed_float) {
1900 return GL_INVALID_ENUM;
1901 }
1902 if (format != GL_RGB) {
1903 return GL_INVALID_OPERATION;
1904 }
1905 return GL_NO_ERROR;
1906
1907 case GL_HALF_FLOAT_OES:
1908 switch (format) {
1909 case GL_RGBA:
1910 case GL_RGB:
1911 case GL_LUMINANCE_ALPHA:
1912 case GL_LUMINANCE:
1913 case GL_ALPHA:
1914 return GL_NO_ERROR;
1915 case GL_RG:
1916 case GL_RED:
1917 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1918 return GL_NO_ERROR;
1919 default:
1920 return GL_INVALID_OPERATION;
1921 }
1922
1923 default:
1924 ; /* fall-through */
1925 }
1926
1927 /* now, for each format, check the type for compatibility */
1928 switch (format) {
1929 case GL_COLOR_INDEX:
1930 case GL_STENCIL_INDEX:
1931 switch (type) {
1932 case GL_BITMAP:
1933 case GL_BYTE:
1934 case GL_UNSIGNED_BYTE:
1935 case GL_SHORT:
1936 case GL_UNSIGNED_SHORT:
1937 case GL_INT:
1938 case GL_UNSIGNED_INT:
1939 case GL_FLOAT:
1940 case GL_HALF_FLOAT:
1941 return GL_NO_ERROR;
1942 default:
1943 return GL_INVALID_ENUM;
1944 }
1945
1946 case GL_RED:
1947 case GL_GREEN:
1948 case GL_BLUE:
1949 case GL_ALPHA:
1950 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1951 case GL_INTENSITY:
1952 #endif
1953 case GL_LUMINANCE:
1954 case GL_LUMINANCE_ALPHA:
1955 case GL_DEPTH_COMPONENT:
1956 switch (type) {
1957 case GL_BYTE:
1958 case GL_UNSIGNED_BYTE:
1959 case GL_SHORT:
1960 case GL_UNSIGNED_SHORT:
1961 case GL_INT:
1962 case GL_UNSIGNED_INT:
1963 case GL_FLOAT:
1964 case GL_HALF_FLOAT:
1965 return GL_NO_ERROR;
1966 default:
1967 return GL_INVALID_ENUM;
1968 }
1969
1970 case GL_RG:
1971 if (!ctx->Extensions.ARB_texture_rg)
1972 return GL_INVALID_ENUM;
1973 switch (type) {
1974 case GL_BYTE:
1975 case GL_UNSIGNED_BYTE:
1976 case GL_SHORT:
1977 case GL_UNSIGNED_SHORT:
1978 case GL_INT:
1979 case GL_UNSIGNED_INT:
1980 case GL_FLOAT:
1981 case GL_HALF_FLOAT:
1982 return GL_NO_ERROR;
1983 default:
1984 return GL_INVALID_ENUM;
1985 }
1986
1987 case GL_RGB:
1988 switch (type) {
1989 case GL_BYTE:
1990 case GL_UNSIGNED_BYTE:
1991 case GL_SHORT:
1992 case GL_UNSIGNED_SHORT:
1993 case GL_INT:
1994 case GL_UNSIGNED_INT:
1995 case GL_FLOAT:
1996 case GL_UNSIGNED_BYTE_3_3_2:
1997 case GL_UNSIGNED_BYTE_2_3_3_REV:
1998 case GL_UNSIGNED_SHORT_5_6_5:
1999 case GL_UNSIGNED_SHORT_5_6_5_REV:
2000 case GL_HALF_FLOAT:
2001 return GL_NO_ERROR;
2002 case GL_UNSIGNED_INT_2_10_10_10_REV:
2003 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
2004 return (ctx->API == API_OPENGLES2)
2005 ? GL_NO_ERROR : GL_INVALID_ENUM;
2006 case GL_UNSIGNED_INT_5_9_9_9_REV:
2007 return ctx->Extensions.EXT_texture_shared_exponent
2008 ? GL_NO_ERROR : GL_INVALID_ENUM;
2009 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2010 return ctx->Extensions.EXT_packed_float
2011 ? GL_NO_ERROR : GL_INVALID_ENUM;
2012 default:
2013 return GL_INVALID_ENUM;
2014 }
2015
2016 case GL_BGR:
2017 switch (type) {
2018 /* NOTE: no packed types are supported with BGR. That's
2019 * intentional, according to the GL spec.
2020 */
2021 case GL_BYTE:
2022 case GL_UNSIGNED_BYTE:
2023 case GL_SHORT:
2024 case GL_UNSIGNED_SHORT:
2025 case GL_INT:
2026 case GL_UNSIGNED_INT:
2027 case GL_FLOAT:
2028 case GL_HALF_FLOAT:
2029 return GL_NO_ERROR;
2030 default:
2031 return GL_INVALID_ENUM;
2032 }
2033
2034 case GL_RGBA:
2035 case GL_BGRA:
2036 switch (type) {
2037 case GL_BYTE:
2038 case GL_UNSIGNED_BYTE:
2039 case GL_SHORT:
2040 case GL_UNSIGNED_SHORT:
2041 case GL_INT:
2042 case GL_UNSIGNED_INT:
2043 case GL_FLOAT:
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 case GL_HALF_FLOAT:
2053 return GL_NO_ERROR;
2054 default:
2055 return GL_INVALID_ENUM;
2056 }
2057
2058 case GL_ABGR_EXT:
2059 switch (type) {
2060 case GL_BYTE:
2061 case GL_UNSIGNED_BYTE:
2062 case GL_SHORT:
2063 case GL_UNSIGNED_SHORT:
2064 case GL_INT:
2065 case GL_UNSIGNED_INT:
2066 case GL_FLOAT:
2067 case GL_UNSIGNED_SHORT_4_4_4_4:
2068 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2069 case GL_UNSIGNED_INT_8_8_8_8:
2070 case GL_UNSIGNED_INT_8_8_8_8_REV:
2071 case GL_HALF_FLOAT:
2072 return GL_NO_ERROR;
2073 default:
2074 return GL_INVALID_ENUM;
2075 }
2076
2077 case GL_YCBCR_MESA:
2078 if (!ctx->Extensions.MESA_ycbcr_texture)
2079 return GL_INVALID_ENUM;
2080 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2081 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2082 return GL_NO_ERROR;
2083 else
2084 return GL_INVALID_OPERATION;
2085
2086 case GL_DEPTH_STENCIL:
2087 if (type == GL_UNSIGNED_INT_24_8)
2088 return GL_NO_ERROR;
2089 else if (ctx->Extensions.ARB_depth_buffer_float &&
2090 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2091 return GL_NO_ERROR;
2092 else
2093 return GL_INVALID_ENUM;
2094
2095 /* integer-valued formats */
2096 case GL_RED_INTEGER_EXT:
2097 case GL_GREEN_INTEGER_EXT:
2098 case GL_BLUE_INTEGER_EXT:
2099 case GL_ALPHA_INTEGER_EXT:
2100 case GL_RG_INTEGER:
2101 switch (type) {
2102 case GL_BYTE:
2103 case GL_UNSIGNED_BYTE:
2104 case GL_SHORT:
2105 case GL_UNSIGNED_SHORT:
2106 case GL_INT:
2107 case GL_UNSIGNED_INT:
2108 return (ctx->Version >= 30 ||
2109 ctx->Extensions.EXT_texture_integer)
2110 ? GL_NO_ERROR : GL_INVALID_ENUM;
2111 default:
2112 return GL_INVALID_ENUM;
2113 }
2114
2115 case GL_RGB_INTEGER_EXT:
2116 switch (type) {
2117 case GL_BYTE:
2118 case GL_UNSIGNED_BYTE:
2119 case GL_SHORT:
2120 case GL_UNSIGNED_SHORT:
2121 case GL_INT:
2122 case GL_UNSIGNED_INT:
2123 return (ctx->Version >= 30 ||
2124 ctx->Extensions.EXT_texture_integer)
2125 ? GL_NO_ERROR : GL_INVALID_ENUM;
2126 case GL_UNSIGNED_BYTE_3_3_2:
2127 case GL_UNSIGNED_BYTE_2_3_3_REV:
2128 case GL_UNSIGNED_SHORT_5_6_5:
2129 case GL_UNSIGNED_SHORT_5_6_5_REV:
2130 return ctx->Extensions.ARB_texture_rgb10_a2ui
2131 ? GL_NO_ERROR : GL_INVALID_ENUM;
2132 default:
2133 return GL_INVALID_ENUM;
2134 }
2135
2136 case GL_BGR_INTEGER_EXT:
2137 switch (type) {
2138 case GL_BYTE:
2139 case GL_UNSIGNED_BYTE:
2140 case GL_SHORT:
2141 case GL_UNSIGNED_SHORT:
2142 case GL_INT:
2143 case GL_UNSIGNED_INT:
2144 /* NOTE: no packed formats w/ BGR format */
2145 return (ctx->Version >= 30 ||
2146 ctx->Extensions.EXT_texture_integer)
2147 ? GL_NO_ERROR : GL_INVALID_ENUM;
2148 default:
2149 return GL_INVALID_ENUM;
2150 }
2151
2152 case GL_RGBA_INTEGER_EXT:
2153 case GL_BGRA_INTEGER_EXT:
2154 switch (type) {
2155 case GL_BYTE:
2156 case GL_UNSIGNED_BYTE:
2157 case GL_SHORT:
2158 case GL_UNSIGNED_SHORT:
2159 case GL_INT:
2160 case GL_UNSIGNED_INT:
2161 return (ctx->Version >= 30 ||
2162 ctx->Extensions.EXT_texture_integer)
2163 ? GL_NO_ERROR : GL_INVALID_ENUM;
2164 case GL_UNSIGNED_SHORT_4_4_4_4:
2165 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2166 case GL_UNSIGNED_SHORT_5_5_5_1:
2167 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2168 case GL_UNSIGNED_INT_8_8_8_8:
2169 case GL_UNSIGNED_INT_8_8_8_8_REV:
2170 case GL_UNSIGNED_INT_10_10_10_2:
2171 case GL_UNSIGNED_INT_2_10_10_10_REV:
2172 return ctx->Extensions.ARB_texture_rgb10_a2ui
2173 ? GL_NO_ERROR : GL_INVALID_ENUM;
2174 default:
2175 return GL_INVALID_ENUM;
2176 }
2177
2178 case GL_LUMINANCE_INTEGER_EXT:
2179 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2180 switch (type) {
2181 case GL_BYTE:
2182 case GL_UNSIGNED_BYTE:
2183 case GL_SHORT:
2184 case GL_UNSIGNED_SHORT:
2185 case GL_INT:
2186 case GL_UNSIGNED_INT:
2187 return ctx->Extensions.EXT_texture_integer
2188 ? GL_NO_ERROR : GL_INVALID_ENUM;
2189 default:
2190 return GL_INVALID_ENUM;
2191 }
2192
2193 default:
2194 return GL_INVALID_ENUM;
2195 }
2196 return GL_NO_ERROR;
2197 }
2198
2199
2200 /**
2201 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2202 * and glTex[Sub]Image.
2203 * \return error code, or GL_NO_ERROR.
2204 */
2205 GLenum
2206 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2207 GLenum format, GLenum type,
2208 unsigned dimensions)
2209 {
2210 GLboolean type_valid = GL_TRUE;
2211
2212 switch (format) {
2213 case GL_RED:
2214 case GL_RG:
2215 if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_texture_rg)
2216 return GL_INVALID_VALUE;
2217 /* fallthrough */
2218 case GL_ALPHA:
2219 case GL_LUMINANCE:
2220 case GL_LUMINANCE_ALPHA:
2221 type_valid = (type == GL_UNSIGNED_BYTE
2222 || type == GL_FLOAT
2223 || type == GL_HALF_FLOAT_OES);
2224 break;
2225
2226 case GL_RGB:
2227 type_valid = (type == GL_UNSIGNED_BYTE
2228 || type == GL_UNSIGNED_SHORT_5_6_5
2229 || type == GL_FLOAT
2230 || type == GL_HALF_FLOAT_OES);
2231 break;
2232
2233 case GL_RGBA:
2234 type_valid = (type == GL_UNSIGNED_BYTE
2235 || type == GL_UNSIGNED_SHORT_4_4_4_4
2236 || type == GL_UNSIGNED_SHORT_5_5_5_1
2237 || type == GL_FLOAT
2238 || type == GL_HALF_FLOAT_OES
2239 || (ctx->Extensions.EXT_texture_type_2_10_10_10_REV &&
2240 type == GL_UNSIGNED_INT_2_10_10_10_REV));
2241 break;
2242
2243 case GL_DEPTH_COMPONENT:
2244 /* This format is filtered against invalid dimensionalities elsewhere.
2245 */
2246 type_valid = (type == GL_UNSIGNED_SHORT
2247 || type == GL_UNSIGNED_INT);
2248 break;
2249
2250 case GL_DEPTH_STENCIL:
2251 /* This format is filtered against invalid dimensionalities elsewhere.
2252 */
2253 type_valid = (type == GL_UNSIGNED_INT_24_8);
2254 break;
2255
2256 case GL_BGRA_EXT:
2257 type_valid = (type == GL_UNSIGNED_BYTE);
2258
2259 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2260 * the format does not appear to be allowed for 3D textures in OpenGL
2261 * ES.
2262 */
2263 if (dimensions != 2)
2264 return GL_INVALID_VALUE;
2265
2266 break;
2267
2268 default:
2269 return GL_INVALID_VALUE;
2270 }
2271
2272 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2273 }
2274
2275 /**
2276 * Return the simple base format for a given internal texture format.
2277 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2278 *
2279 * \param ctx GL context.
2280 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2281 *
2282 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2283 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2284 *
2285 * This is the format which is used during texture application (i.e. the
2286 * texture format and env mode determine the arithmetic used.
2287 */
2288 GLint
2289 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2290 {
2291 switch (internalFormat) {
2292 case GL_ALPHA:
2293 case GL_ALPHA4:
2294 case GL_ALPHA8:
2295 case GL_ALPHA12:
2296 case GL_ALPHA16:
2297 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2298 case 1:
2299 case GL_LUMINANCE:
2300 case GL_LUMINANCE4:
2301 case GL_LUMINANCE8:
2302 case GL_LUMINANCE12:
2303 case GL_LUMINANCE16:
2304 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2305 case 2:
2306 case GL_LUMINANCE_ALPHA:
2307 case GL_LUMINANCE4_ALPHA4:
2308 case GL_LUMINANCE6_ALPHA2:
2309 case GL_LUMINANCE8_ALPHA8:
2310 case GL_LUMINANCE12_ALPHA4:
2311 case GL_LUMINANCE12_ALPHA12:
2312 case GL_LUMINANCE16_ALPHA16:
2313 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2314 case GL_INTENSITY:
2315 case GL_INTENSITY4:
2316 case GL_INTENSITY8:
2317 case GL_INTENSITY12:
2318 case GL_INTENSITY16:
2319 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2320 case 3:
2321 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2322 case GL_RGB:
2323 case GL_R3_G3_B2:
2324 case GL_RGB4:
2325 case GL_RGB5:
2326 case GL_RGB8:
2327 case GL_RGB10:
2328 case GL_RGB12:
2329 case GL_RGB16:
2330 return GL_RGB;
2331 case 4:
2332 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2333 case GL_RGBA:
2334 case GL_RGBA2:
2335 case GL_RGBA4:
2336 case GL_RGB5_A1:
2337 case GL_RGBA8:
2338 case GL_RGB10_A2:
2339 case GL_RGBA12:
2340 case GL_RGBA16:
2341 return GL_RGBA;
2342 default:
2343 ; /* fallthrough */
2344 }
2345
2346 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2347 */
2348 if (_mesa_is_gles(ctx)) {
2349 switch (internalFormat) {
2350 case GL_BGRA:
2351 return GL_RGBA;
2352 default:
2353 ; /* fallthrough */
2354 }
2355 }
2356
2357 if (ctx->Extensions.ARB_ES2_compatibility) {
2358 switch (internalFormat) {
2359 case GL_RGB565:
2360 return GL_RGB;
2361 default:
2362 ; /* fallthrough */
2363 }
2364 }
2365
2366 if (ctx->Extensions.ARB_depth_texture) {
2367 switch (internalFormat) {
2368 case GL_DEPTH_COMPONENT:
2369 case GL_DEPTH_COMPONENT16:
2370 case GL_DEPTH_COMPONENT24:
2371 case GL_DEPTH_COMPONENT32:
2372 return GL_DEPTH_COMPONENT;
2373 case GL_DEPTH_STENCIL:
2374 case GL_DEPTH24_STENCIL8:
2375 return GL_DEPTH_STENCIL;
2376 default:
2377 ; /* fallthrough */
2378 }
2379 }
2380
2381 if (ctx->Extensions.ARB_texture_stencil8) {
2382 switch (internalFormat) {
2383 case GL_STENCIL_INDEX:
2384 case GL_STENCIL_INDEX1:
2385 case GL_STENCIL_INDEX4:
2386 case GL_STENCIL_INDEX8:
2387 case GL_STENCIL_INDEX16:
2388 return GL_STENCIL_INDEX;
2389 default:
2390 ; /* fallthrough */
2391 }
2392 }
2393
2394 switch (internalFormat) {
2395 case GL_COMPRESSED_ALPHA:
2396 return GL_ALPHA;
2397 case GL_COMPRESSED_LUMINANCE:
2398 return GL_LUMINANCE;
2399 case GL_COMPRESSED_LUMINANCE_ALPHA:
2400 return GL_LUMINANCE_ALPHA;
2401 case GL_COMPRESSED_INTENSITY:
2402 return GL_INTENSITY;
2403 case GL_COMPRESSED_RGB:
2404 return GL_RGB;
2405 case GL_COMPRESSED_RGBA:
2406 return GL_RGBA;
2407 default:
2408 ; /* fallthrough */
2409 }
2410
2411 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2412 GLenum base_compressed =
2413 _mesa_gl_compressed_format_base_format(internalFormat);
2414 if (base_compressed)
2415 return base_compressed;
2416 }
2417
2418 if ((ctx->Extensions.KHR_texture_compression_astc_ldr &&
2419 is_astc_2d_format(internalFormat)) ||
2420 (ctx->Extensions.OES_texture_compression_astc &&
2421 is_astc_3d_format(internalFormat)))
2422 return GL_RGBA;
2423
2424 if (ctx->Extensions.MESA_ycbcr_texture) {
2425 if (internalFormat == GL_YCBCR_MESA)
2426 return GL_YCBCR_MESA;
2427 }
2428
2429 if (ctx->Extensions.ARB_texture_float) {
2430 switch (internalFormat) {
2431 case GL_ALPHA16F_ARB:
2432 case GL_ALPHA32F_ARB:
2433 return GL_ALPHA;
2434 case GL_RGBA16F_ARB:
2435 case GL_RGBA32F_ARB:
2436 return GL_RGBA;
2437 case GL_RGB16F_ARB:
2438 case GL_RGB32F_ARB:
2439 return GL_RGB;
2440 case GL_INTENSITY16F_ARB:
2441 case GL_INTENSITY32F_ARB:
2442 return GL_INTENSITY;
2443 case GL_LUMINANCE16F_ARB:
2444 case GL_LUMINANCE32F_ARB:
2445 return GL_LUMINANCE;
2446 case GL_LUMINANCE_ALPHA16F_ARB:
2447 case GL_LUMINANCE_ALPHA32F_ARB:
2448 return GL_LUMINANCE_ALPHA;
2449 default:
2450 ; /* fallthrough */
2451 }
2452 }
2453
2454 if (ctx->Extensions.EXT_texture_snorm) {
2455 switch (internalFormat) {
2456 case GL_RED_SNORM:
2457 case GL_R8_SNORM:
2458 case GL_R16_SNORM:
2459 return GL_RED;
2460 case GL_RG_SNORM:
2461 case GL_RG8_SNORM:
2462 case GL_RG16_SNORM:
2463 return GL_RG;
2464 case GL_RGB_SNORM:
2465 case GL_RGB8_SNORM:
2466 case GL_RGB16_SNORM:
2467 return GL_RGB;
2468 case GL_RGBA_SNORM:
2469 case GL_RGBA8_SNORM:
2470 case GL_RGBA16_SNORM:
2471 return GL_RGBA;
2472 case GL_ALPHA_SNORM:
2473 case GL_ALPHA8_SNORM:
2474 case GL_ALPHA16_SNORM:
2475 return GL_ALPHA;
2476 case GL_LUMINANCE_SNORM:
2477 case GL_LUMINANCE8_SNORM:
2478 case GL_LUMINANCE16_SNORM:
2479 return GL_LUMINANCE;
2480 case GL_LUMINANCE_ALPHA_SNORM:
2481 case GL_LUMINANCE8_ALPHA8_SNORM:
2482 case GL_LUMINANCE16_ALPHA16_SNORM:
2483 return GL_LUMINANCE_ALPHA;
2484 case GL_INTENSITY_SNORM:
2485 case GL_INTENSITY8_SNORM:
2486 case GL_INTENSITY16_SNORM:
2487 return GL_INTENSITY;
2488 default:
2489 ; /* fallthrough */
2490 }
2491 }
2492
2493 if (ctx->Extensions.EXT_texture_sRGB) {
2494 switch (internalFormat) {
2495 case GL_SRGB_EXT:
2496 case GL_SRGB8_EXT:
2497 case GL_COMPRESSED_SRGB_EXT:
2498 return GL_RGB;
2499 case GL_SRGB_ALPHA_EXT:
2500 case GL_SRGB8_ALPHA8_EXT:
2501 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2502 return GL_RGBA;
2503 case GL_SLUMINANCE_ALPHA_EXT:
2504 case GL_SLUMINANCE8_ALPHA8_EXT:
2505 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2506 return GL_LUMINANCE_ALPHA;
2507 case GL_SLUMINANCE_EXT:
2508 case GL_SLUMINANCE8_EXT:
2509 case GL_COMPRESSED_SLUMINANCE_EXT:
2510 return GL_LUMINANCE;
2511 default:
2512 ; /* fallthrough */
2513 }
2514 }
2515
2516 if (ctx->Version >= 30 ||
2517 ctx->Extensions.EXT_texture_integer) {
2518 switch (internalFormat) {
2519 case GL_RGBA8UI_EXT:
2520 case GL_RGBA16UI_EXT:
2521 case GL_RGBA32UI_EXT:
2522 case GL_RGBA8I_EXT:
2523 case GL_RGBA16I_EXT:
2524 case GL_RGBA32I_EXT:
2525 return GL_RGBA;
2526 case GL_RGB8UI_EXT:
2527 case GL_RGB16UI_EXT:
2528 case GL_RGB32UI_EXT:
2529 case GL_RGB8I_EXT:
2530 case GL_RGB16I_EXT:
2531 case GL_RGB32I_EXT:
2532 return GL_RGB;
2533 }
2534 }
2535
2536 if (ctx->Extensions.ARB_texture_rgb10_a2ui) {
2537 switch (internalFormat) {
2538 case GL_RGB10_A2UI:
2539 return GL_RGBA;
2540 }
2541 }
2542
2543 if (ctx->Extensions.EXT_texture_integer) {
2544 switch (internalFormat) {
2545 case GL_ALPHA8UI_EXT:
2546 case GL_ALPHA16UI_EXT:
2547 case GL_ALPHA32UI_EXT:
2548 case GL_ALPHA8I_EXT:
2549 case GL_ALPHA16I_EXT:
2550 case GL_ALPHA32I_EXT:
2551 return GL_ALPHA;
2552 case GL_INTENSITY8UI_EXT:
2553 case GL_INTENSITY16UI_EXT:
2554 case GL_INTENSITY32UI_EXT:
2555 case GL_INTENSITY8I_EXT:
2556 case GL_INTENSITY16I_EXT:
2557 case GL_INTENSITY32I_EXT:
2558 return GL_INTENSITY;
2559 case GL_LUMINANCE8UI_EXT:
2560 case GL_LUMINANCE16UI_EXT:
2561 case GL_LUMINANCE32UI_EXT:
2562 case GL_LUMINANCE8I_EXT:
2563 case GL_LUMINANCE16I_EXT:
2564 case GL_LUMINANCE32I_EXT:
2565 return GL_LUMINANCE;
2566 case GL_LUMINANCE_ALPHA8UI_EXT:
2567 case GL_LUMINANCE_ALPHA16UI_EXT:
2568 case GL_LUMINANCE_ALPHA32UI_EXT:
2569 case GL_LUMINANCE_ALPHA8I_EXT:
2570 case GL_LUMINANCE_ALPHA16I_EXT:
2571 case GL_LUMINANCE_ALPHA32I_EXT:
2572 return GL_LUMINANCE_ALPHA;
2573 default:
2574 ; /* fallthrough */
2575 }
2576 }
2577
2578 if (ctx->Extensions.ARB_texture_rg) {
2579 switch (internalFormat) {
2580 case GL_R16F:
2581 case GL_R32F:
2582 if (!ctx->Extensions.ARB_texture_float)
2583 break;
2584 return GL_RED;
2585 case GL_R8I:
2586 case GL_R8UI:
2587 case GL_R16I:
2588 case GL_R16UI:
2589 case GL_R32I:
2590 case GL_R32UI:
2591 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2592 break;
2593 /* FALLTHROUGH */
2594 case GL_R8:
2595 case GL_R16:
2596 case GL_RED:
2597 case GL_COMPRESSED_RED:
2598 return GL_RED;
2599
2600 case GL_RG16F:
2601 case GL_RG32F:
2602 if (!ctx->Extensions.ARB_texture_float)
2603 break;
2604 return GL_RG;
2605 case GL_RG8I:
2606 case GL_RG8UI:
2607 case GL_RG16I:
2608 case GL_RG16UI:
2609 case GL_RG32I:
2610 case GL_RG32UI:
2611 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2612 break;
2613 /* FALLTHROUGH */
2614 case GL_RG:
2615 case GL_RG8:
2616 case GL_RG16:
2617 case GL_COMPRESSED_RG:
2618 return GL_RG;
2619 default:
2620 ; /* fallthrough */
2621 }
2622 }
2623
2624 if (ctx->Extensions.EXT_texture_shared_exponent) {
2625 switch (internalFormat) {
2626 case GL_RGB9_E5_EXT:
2627 return GL_RGB;
2628 default:
2629 ; /* fallthrough */
2630 }
2631 }
2632
2633 if (ctx->Extensions.EXT_packed_float) {
2634 switch (internalFormat) {
2635 case GL_R11F_G11F_B10F_EXT:
2636 return GL_RGB;
2637 default:
2638 ; /* fallthrough */
2639 }
2640 }
2641
2642 if (ctx->Extensions.ARB_depth_buffer_float) {
2643 switch (internalFormat) {
2644 case GL_DEPTH_COMPONENT32F:
2645 return GL_DEPTH_COMPONENT;
2646 case GL_DEPTH32F_STENCIL8:
2647 return GL_DEPTH_STENCIL;
2648 default:
2649 ; /* fallthrough */
2650 }
2651 }
2652
2653 return -1; /* error */
2654 }
2655
2656 /**
2657 * Returns the effective internal format from a texture format and type.
2658 * This is used by texture image operations internally for validation, when
2659 * the specified internal format is a base (unsized) format.
2660 *
2661 * This method will only return a valid effective internal format if the
2662 * combination of format, type and internal format in base form, is acceptable.
2663 *
2664 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2665 * in extensions, to unambiguously correspond to the given base format, then
2666 * that internal format is returned as the effective. Otherwise, if the
2667 * combination is accepted but a single effective format is not defined, the
2668 * passed base format will be returned instead.
2669 *
2670 * \param format the texture format
2671 * \param type the texture type
2672 */
2673 static GLenum
2674 _mesa_es3_effective_internal_format_for_format_and_type(GLenum format,
2675 GLenum type)
2676 {
2677 switch (type) {
2678 case GL_UNSIGNED_BYTE:
2679 switch (format) {
2680 case GL_RGBA:
2681 return GL_RGBA8;
2682 case GL_RGB:
2683 return GL_RGB8;
2684 case GL_RG:
2685 return GL_RG8;
2686 case GL_RED:
2687 return GL_R8;
2688 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2689 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2690 * internal formats, they do not correspond to GL constants, so the base
2691 * format is returned instead.
2692 */
2693 case GL_BGRA_EXT:
2694 case GL_LUMINANCE_ALPHA:
2695 case GL_LUMINANCE:
2696 case GL_ALPHA:
2697 return format;
2698 }
2699 break;
2700
2701 case GL_UNSIGNED_SHORT_4_4_4_4:
2702 if (format == GL_RGBA)
2703 return GL_RGBA4;
2704 break;
2705
2706 case GL_UNSIGNED_SHORT_5_5_5_1:
2707 if (format == GL_RGBA)
2708 return GL_RGB5_A1;
2709 break;
2710
2711 case GL_UNSIGNED_SHORT_5_6_5:
2712 if (format == GL_RGB)
2713 return GL_RGB565;
2714 break;
2715
2716 /* OES_packed_depth_stencil */
2717 case GL_UNSIGNED_INT_24_8:
2718 if (format == GL_DEPTH_STENCIL)
2719 return GL_DEPTH24_STENCIL8;
2720 break;
2721
2722 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2723 if (format == GL_DEPTH_STENCIL)
2724 return GL_DEPTH32F_STENCIL8;
2725 break;
2726
2727 case GL_UNSIGNED_SHORT:
2728 if (format == GL_DEPTH_COMPONENT)
2729 return GL_DEPTH_COMPONENT16;
2730 break;
2731
2732 case GL_UNSIGNED_INT:
2733 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2734 * the format.
2735 */
2736 if (format == GL_DEPTH_COMPONENT)
2737 return format;
2738 break;
2739
2740 /* OES_texture_float and OES_texture_half_float */
2741 case GL_FLOAT:
2742 if (format == GL_DEPTH_COMPONENT)
2743 return GL_DEPTH_COMPONENT32F;
2744 /* fall through */
2745 case GL_HALF_FLOAT_OES:
2746 switch (format) {
2747 case GL_RGBA:
2748 case GL_RGB:
2749 case GL_LUMINANCE_ALPHA:
2750 case GL_LUMINANCE:
2751 case GL_ALPHA:
2752 case GL_RED:
2753 case GL_RG:
2754 return format;
2755 }
2756 break;
2757 case GL_HALF_FLOAT:
2758 switch (format) {
2759 case GL_RG:
2760 case GL_RED:
2761 return format;
2762 }
2763 break;
2764
2765 /* GL_EXT_texture_type_2_10_10_10_REV */
2766 case GL_UNSIGNED_INT_2_10_10_10_REV:
2767 switch (format) {
2768 case GL_RGBA:
2769 case GL_RGB:
2770 return format;
2771 }
2772 break;
2773
2774 default:
2775 /* fall through and return NONE */
2776 break;
2777 }
2778
2779 return GL_NONE;
2780 }
2781
2782 /**
2783 * Do error checking of format/type combinations for OpenGL ES 3
2784 * glTex[Sub]Image, or ES1/ES2 with GL_OES_required_internalformat.
2785 * \return error code, or GL_NO_ERROR.
2786 */
2787 GLenum
2788 _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
2789 GLenum format, GLenum type,
2790 GLenum internalFormat)
2791 {
2792 /* If internalFormat is an unsized format, then the effective internal
2793 * format derived from format and type should be used instead. Page 127,
2794 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2795 *
2796 * "if internalformat is a base internal format, the effective
2797 * internal format is a sized internal format that is derived
2798 * from the format and type for internal use by the GL.
2799 * Table 3.12 specifies the mapping of format and type to effective
2800 * internal formats. The effective internal format is used by the GL
2801 * for purposes such as texture completeness or type checks for
2802 * CopyTex* commands. In these cases, the GL is required to operate
2803 * as if the effective internal format was used as the internalformat
2804 * when specifying the texture data."
2805 */
2806 if (_mesa_is_enum_format_unsized(internalFormat)) {
2807 GLenum effectiveInternalFormat =
2808 _mesa_es3_effective_internal_format_for_format_and_type(format, type);
2809
2810 if (effectiveInternalFormat == GL_NONE)
2811 return GL_INVALID_OPERATION;
2812
2813 GLenum baseInternalFormat;
2814 if (internalFormat == GL_BGRA_EXT) {
2815 /* Unfortunately, _mesa_base_tex_format returns a base format of
2816 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2817 * asking the question, "what channels does this format have?"
2818 * However, if we're trying to determine if two internal formats
2819 * match in the ES3 sense, we actually want GL_BGRA.
2820 */
2821 baseInternalFormat = GL_BGRA_EXT;
2822 } else {
2823 baseInternalFormat =
2824 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2825 }
2826
2827 if (internalFormat != baseInternalFormat)
2828 return GL_INVALID_OPERATION;
2829
2830 internalFormat = effectiveInternalFormat;
2831 }
2832
2833 switch (format) {
2834 case GL_BGRA_EXT:
2835 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2836 return GL_INVALID_OPERATION;
2837 break;
2838
2839 case GL_RGBA:
2840 switch (type) {
2841 case GL_UNSIGNED_BYTE:
2842 switch (internalFormat) {
2843 case GL_RGBA:
2844 case GL_RGBA8:
2845 case GL_RGB5_A1:
2846 case GL_RGBA4:
2847 break;
2848 case GL_SRGB8_ALPHA8_EXT:
2849 if (ctx->Version <= 20)
2850 return GL_INVALID_OPERATION;
2851 break;
2852 default:
2853 return GL_INVALID_OPERATION;
2854 }
2855 break;
2856
2857 case GL_BYTE:
2858 if (ctx->Version <= 20 || internalFormat != GL_RGBA8_SNORM)
2859 return GL_INVALID_OPERATION;
2860 break;
2861
2862 case GL_UNSIGNED_SHORT:
2863 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGBA16)
2864 return GL_INVALID_OPERATION;
2865 break;
2866
2867 case GL_SHORT:
2868 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2869 internalFormat != GL_RGBA16_SNORM)
2870 return GL_INVALID_OPERATION;
2871 break;
2872
2873 case GL_UNSIGNED_SHORT_4_4_4_4:
2874 switch (internalFormat) {
2875 case GL_RGBA:
2876 case GL_RGBA4:
2877 break;
2878 default:
2879 return GL_INVALID_OPERATION;
2880 }
2881 break;
2882
2883 case GL_UNSIGNED_SHORT_5_5_5_1:
2884 switch (internalFormat) {
2885 case GL_RGBA:
2886 case GL_RGB5_A1:
2887 break;
2888 default:
2889 return GL_INVALID_OPERATION;
2890 }
2891 break;
2892
2893 case GL_UNSIGNED_INT_2_10_10_10_REV:
2894 switch (internalFormat) {
2895 case GL_RGBA:
2896 case GL_RGB10_A2:
2897 case GL_RGB5_A1:
2898 if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
2899 return GL_INVALID_OPERATION;
2900 break;
2901 default:
2902 return GL_INVALID_OPERATION;
2903 }
2904 break;
2905
2906 case GL_HALF_FLOAT:
2907 if (ctx->Version <= 20 || internalFormat != GL_RGBA16F)
2908 return GL_INVALID_OPERATION;
2909 break;
2910
2911 case GL_FLOAT:
2912 switch (internalFormat) {
2913 case GL_RGBA16F:
2914 case GL_RGBA32F:
2915 if (ctx->Version <= 20)
2916 return GL_INVALID_OPERATION;
2917 break;
2918 case GL_RGBA:
2919 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2920 break;
2921 default:
2922 return GL_INVALID_OPERATION;
2923 }
2924 break;
2925
2926 case GL_HALF_FLOAT_OES:
2927 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2928 break;
2929 default:
2930 return GL_INVALID_OPERATION;
2931 }
2932 break;
2933
2934 case GL_RGBA_INTEGER:
2935 if (ctx->Version <= 20)
2936 return GL_INVALID_OPERATION;
2937 switch (type) {
2938 case GL_UNSIGNED_BYTE:
2939 if (internalFormat != GL_RGBA8UI)
2940 return GL_INVALID_OPERATION;
2941 break;
2942
2943 case GL_BYTE:
2944 if (internalFormat != GL_RGBA8I)
2945 return GL_INVALID_OPERATION;
2946 break;
2947
2948 case GL_UNSIGNED_SHORT:
2949 if (internalFormat != GL_RGBA16UI)
2950 return GL_INVALID_OPERATION;
2951 break;
2952
2953 case GL_SHORT:
2954 if (internalFormat != GL_RGBA16I)
2955 return GL_INVALID_OPERATION;
2956 break;
2957
2958 case GL_UNSIGNED_INT:
2959 if (internalFormat != GL_RGBA32UI)
2960 return GL_INVALID_OPERATION;
2961 break;
2962
2963 case GL_INT:
2964 if (internalFormat != GL_RGBA32I)
2965 return GL_INVALID_OPERATION;
2966 break;
2967
2968 case GL_UNSIGNED_INT_2_10_10_10_REV:
2969 if (internalFormat != GL_RGB10_A2UI)
2970 return GL_INVALID_OPERATION;
2971 break;
2972
2973 default:
2974 return GL_INVALID_OPERATION;
2975 }
2976 break;
2977
2978 case GL_RGB:
2979 switch (type) {
2980 case GL_UNSIGNED_BYTE:
2981 switch (internalFormat) {
2982 case GL_RGB:
2983 case GL_RGB8:
2984 case GL_RGB565:
2985 break;
2986 case GL_SRGB8:
2987 if (ctx->Version <= 20)
2988 return GL_INVALID_OPERATION;
2989 break;
2990 default:
2991 return GL_INVALID_OPERATION;
2992 }
2993 break;
2994
2995 case GL_BYTE:
2996 if (ctx->Version <= 20 || internalFormat != GL_RGB8_SNORM)
2997 return GL_INVALID_OPERATION;
2998 break;
2999
3000 case GL_UNSIGNED_SHORT:
3001 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGB16)
3002 return GL_INVALID_OPERATION;
3003 break;
3004
3005 case GL_SHORT:
3006 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3007 internalFormat != GL_RGB16_SNORM)
3008 return GL_INVALID_OPERATION;
3009 break;
3010
3011 case GL_UNSIGNED_SHORT_5_6_5:
3012 switch (internalFormat) {
3013 case GL_RGB:
3014 case GL_RGB565:
3015 break;
3016 default:
3017 return GL_INVALID_OPERATION;
3018 }
3019 break;
3020
3021 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3022 if (ctx->Version <= 20 || internalFormat != GL_R11F_G11F_B10F)
3023 return GL_INVALID_OPERATION;
3024 break;
3025
3026 case GL_UNSIGNED_INT_5_9_9_9_REV:
3027 if (ctx->Version <= 20 || internalFormat != GL_RGB9_E5)
3028 return GL_INVALID_OPERATION;
3029 break;
3030
3031 case GL_HALF_FLOAT:
3032 if (ctx->Version <= 20)
3033 return GL_INVALID_OPERATION;
3034 switch (internalFormat) {
3035 case GL_RGB16F:
3036 case GL_R11F_G11F_B10F:
3037 case GL_RGB9_E5:
3038 break;
3039 default:
3040 return GL_INVALID_OPERATION;
3041 }
3042 break;
3043
3044 case GL_FLOAT:
3045 switch (internalFormat) {
3046 case GL_RGB16F:
3047 case GL_RGB32F:
3048 case GL_R11F_G11F_B10F:
3049 case GL_RGB9_E5:
3050 if (ctx->Version <= 20)
3051 return GL_INVALID_OPERATION;
3052 break;
3053 case GL_RGB:
3054 if (ctx->Extensions.OES_texture_float && internalFormat == format)
3055 break;
3056 default:
3057 return GL_INVALID_OPERATION;
3058 }
3059 break;
3060
3061 case GL_HALF_FLOAT_OES:
3062 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3063 return GL_INVALID_OPERATION;
3064 break;
3065
3066 case GL_UNSIGNED_INT_2_10_10_10_REV:
3067 switch (internalFormat) {
3068 case GL_RGB:
3069 case GL_RGB10:
3070 case GL_RGB8:
3071 case GL_RGB565:
3072 /* GL_EXT_texture_type_2_10_10_10_REV allows GL_RGB even though
3073 * GLES3 doesn't, and GL_OES_required_internalformat extends that
3074 * to allow the sized RGB internalformats as well.
3075 */
3076 if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
3077 return GL_INVALID_OPERATION;
3078 break;
3079 default:
3080 return GL_INVALID_OPERATION;
3081 }
3082 break;
3083
3084 default:
3085 return GL_INVALID_OPERATION;
3086 }
3087 break;
3088
3089 case GL_RGB_INTEGER:
3090 if (ctx->Version <= 20)
3091 return GL_INVALID_OPERATION;
3092 switch (type) {
3093 case GL_UNSIGNED_BYTE:
3094 if (internalFormat != GL_RGB8UI)
3095 return GL_INVALID_OPERATION;
3096 break;
3097
3098 case GL_BYTE:
3099 if (internalFormat != GL_RGB8I)
3100 return GL_INVALID_OPERATION;
3101 break;
3102
3103 case GL_UNSIGNED_SHORT:
3104 if (internalFormat != GL_RGB16UI)
3105 return GL_INVALID_OPERATION;
3106 break;
3107
3108 case GL_SHORT:
3109 if (internalFormat != GL_RGB16I)
3110 return GL_INVALID_OPERATION;
3111 break;
3112
3113 case GL_UNSIGNED_INT:
3114 if (internalFormat != GL_RGB32UI)
3115 return GL_INVALID_OPERATION;
3116 break;
3117
3118 case GL_INT:
3119 if (internalFormat != GL_RGB32I)
3120 return GL_INVALID_OPERATION;
3121 break;
3122
3123 default:
3124 return GL_INVALID_OPERATION;
3125 }
3126 break;
3127
3128 case GL_RG:
3129 if (!ctx->Extensions.ARB_texture_rg)
3130 return GL_INVALID_OPERATION;
3131 switch (type) {
3132 case GL_UNSIGNED_BYTE:
3133 if (internalFormat != GL_RG8)
3134 return GL_INVALID_OPERATION;
3135 break;
3136
3137 case GL_BYTE:
3138 if (internalFormat != GL_RG8_SNORM)
3139 return GL_INVALID_OPERATION;
3140 break;
3141
3142 case GL_UNSIGNED_SHORT:
3143 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RG16)
3144 return GL_INVALID_OPERATION;
3145 break;
3146
3147 case GL_SHORT:
3148 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3149 internalFormat != GL_RG16_SNORM)
3150 return GL_INVALID_OPERATION;
3151 break;
3152
3153 case GL_HALF_FLOAT:
3154 case GL_HALF_FLOAT_OES:
3155 switch (internalFormat) {
3156 case GL_RG16F:
3157 if (ctx->Version <= 20)
3158 return GL_INVALID_OPERATION;
3159 break;
3160 case GL_RG:
3161 if (ctx->Extensions.ARB_texture_rg &&
3162 ctx->Extensions.OES_texture_half_float)
3163 break;
3164 /* fallthrough */
3165 default:
3166 return GL_INVALID_OPERATION;
3167 }
3168 break;
3169
3170 case GL_FLOAT:
3171 switch (internalFormat) {
3172 case GL_RG16F:
3173 case GL_RG32F:
3174 break;
3175 case GL_RG:
3176 if (ctx->Extensions.ARB_texture_rg &&
3177 ctx->Extensions.OES_texture_float)
3178 break;
3179 /* fallthrough */
3180 default:
3181 return GL_INVALID_OPERATION;
3182 }
3183 break;
3184
3185 default:
3186 return GL_INVALID_OPERATION;
3187 }
3188 break;
3189
3190 case GL_RG_INTEGER:
3191 if (ctx->Version <= 20)
3192 return GL_INVALID_OPERATION;
3193 switch (type) {
3194 case GL_UNSIGNED_BYTE:
3195 if (internalFormat != GL_RG8UI)
3196 return GL_INVALID_OPERATION;
3197 break;
3198
3199 case GL_BYTE:
3200 if (internalFormat != GL_RG8I)
3201 return GL_INVALID_OPERATION;
3202 break;
3203
3204 case GL_UNSIGNED_SHORT:
3205 if (internalFormat != GL_RG16UI)
3206 return GL_INVALID_OPERATION;
3207 break;
3208
3209 case GL_SHORT:
3210 if (internalFormat != GL_RG16I)
3211 return GL_INVALID_OPERATION;
3212 break;
3213
3214 case GL_UNSIGNED_INT:
3215 if (internalFormat != GL_RG32UI)
3216 return GL_INVALID_OPERATION;
3217 break;
3218
3219 case GL_INT:
3220 if (internalFormat != GL_RG32I)
3221 return GL_INVALID_OPERATION;
3222 break;
3223
3224 default:
3225 return GL_INVALID_OPERATION;
3226 }
3227 break;
3228
3229 case GL_RED:
3230 if (!ctx->Extensions.ARB_texture_rg)
3231 return GL_INVALID_OPERATION;
3232 switch (type) {
3233 case GL_UNSIGNED_BYTE:
3234 if (internalFormat != GL_R8)
3235 return GL_INVALID_OPERATION;
3236 break;
3237
3238 case GL_BYTE:
3239 if (internalFormat != GL_R8_SNORM)
3240 return GL_INVALID_OPERATION;
3241 break;
3242
3243 case GL_UNSIGNED_SHORT:
3244 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_R16)
3245 return GL_INVALID_OPERATION;
3246 break;
3247
3248 case GL_SHORT:
3249 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3250 internalFormat != GL_R16_SNORM)
3251 return GL_INVALID_OPERATION;
3252 break;
3253
3254 case GL_HALF_FLOAT:
3255 case GL_HALF_FLOAT_OES:
3256 switch (internalFormat) {
3257 case GL_R16F:
3258 if (ctx->Version <= 20)
3259 return GL_INVALID_OPERATION;
3260 break;
3261 case GL_RG:
3262 case GL_RED:
3263 if (ctx->Extensions.ARB_texture_rg &&
3264 ctx->Extensions.OES_texture_half_float)
3265 break;
3266 /* fallthrough */
3267 default:
3268 return GL_INVALID_OPERATION;
3269 }
3270 break;
3271
3272 case GL_FLOAT:
3273 switch (internalFormat) {
3274 case GL_R16F:
3275 case GL_R32F:
3276 break;
3277 case GL_RED:
3278 if (ctx->Extensions.ARB_texture_rg &&
3279 ctx->Extensions.OES_texture_float)
3280 break;
3281 /* fallthrough */
3282 default:
3283 return GL_INVALID_OPERATION;
3284 }
3285 break;
3286
3287 default:
3288 return GL_INVALID_OPERATION;
3289 }
3290 break;
3291
3292 case GL_RED_INTEGER:
3293 if (ctx->Version <= 20)
3294 return GL_INVALID_OPERATION;
3295 switch (type) {
3296 case GL_UNSIGNED_BYTE:
3297 if (internalFormat != GL_R8UI)
3298 return GL_INVALID_OPERATION;
3299 break;
3300
3301 case GL_BYTE:
3302 if (internalFormat != GL_R8I)
3303 return GL_INVALID_OPERATION;
3304 break;
3305
3306 case GL_UNSIGNED_SHORT:
3307 if (internalFormat != GL_R16UI)
3308 return GL_INVALID_OPERATION;
3309 break;
3310
3311 case GL_SHORT:
3312 if (internalFormat != GL_R16I)
3313 return GL_INVALID_OPERATION;
3314 break;
3315
3316 case GL_UNSIGNED_INT:
3317 if (internalFormat != GL_R32UI)
3318 return GL_INVALID_OPERATION;
3319 break;
3320
3321 case GL_INT:
3322 if (internalFormat != GL_R32I)
3323 return GL_INVALID_OPERATION;
3324 break;
3325
3326 default:
3327 return GL_INVALID_OPERATION;
3328 }
3329 break;
3330
3331 case GL_DEPTH_COMPONENT:
3332 switch (type) {
3333 case GL_UNSIGNED_SHORT:
3334 if (internalFormat != GL_DEPTH_COMPONENT
3335 && internalFormat != GL_DEPTH_COMPONENT16)
3336 return GL_INVALID_OPERATION;
3337 break;
3338
3339 case GL_UNSIGNED_INT:
3340 switch (internalFormat) {
3341 case GL_DEPTH_COMPONENT:
3342 case GL_DEPTH_COMPONENT16:
3343 case GL_DEPTH_COMPONENT24:
3344 break;
3345 default:
3346 return GL_INVALID_OPERATION;
3347 }
3348 break;
3349
3350 case GL_FLOAT:
3351 if (ctx->Version <= 20 || internalFormat != GL_DEPTH_COMPONENT32F)
3352 return GL_INVALID_OPERATION;
3353 break;
3354
3355 default:
3356 return GL_INVALID_OPERATION;
3357 }
3358 break;
3359
3360 case GL_DEPTH_STENCIL:
3361 switch (type) {
3362 case GL_UNSIGNED_INT_24_8:
3363 if (internalFormat != GL_DEPTH_STENCIL
3364 && internalFormat != GL_DEPTH24_STENCIL8)
3365 return GL_INVALID_OPERATION;
3366 break;
3367
3368 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3369 if (ctx->Version <= 20 || internalFormat != GL_DEPTH32F_STENCIL8)
3370 return GL_INVALID_OPERATION;
3371 break;
3372
3373 default:
3374 return GL_INVALID_OPERATION;
3375 }
3376 break;
3377
3378 case GL_STENCIL_INDEX:
3379 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3380 type != GL_UNSIGNED_BYTE ||
3381 internalFormat != GL_STENCIL_INDEX8) {
3382 return GL_INVALID_OPERATION;
3383 }
3384 break;
3385
3386 case GL_ALPHA:
3387 case GL_LUMINANCE:
3388 case GL_LUMINANCE_ALPHA:
3389 switch (type) {
3390 case GL_FLOAT:
3391 if (!ctx->Extensions.OES_texture_float || internalFormat != format)
3392 return GL_INVALID_OPERATION;
3393 break;
3394 case GL_HALF_FLOAT_OES:
3395 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3396 return GL_INVALID_OPERATION;
3397 break;
3398 case GL_UNSIGNED_BYTE:
3399 if (!(format == internalFormat ||
3400 (format == GL_ALPHA && internalFormat == GL_ALPHA8) ||
3401 (format == GL_LUMINANCE && internalFormat == GL_LUMINANCE8) ||
3402 (format == GL_LUMINANCE_ALPHA &&
3403 ((internalFormat == GL_LUMINANCE8_ALPHA8) ||
3404 (internalFormat == GL_LUMINANCE4_ALPHA4))))) {
3405 return GL_INVALID_OPERATION;
3406 }
3407 break;
3408 default:
3409 return GL_INVALID_OPERATION;
3410 }
3411 break;
3412 }
3413
3414 return GL_NO_ERROR;
3415 }
3416
3417 static void
3418 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3419 {
3420 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3421 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3422 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3423 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3424 }
3425
3426 static bool
3427 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3428 {
3429 switch (format) {
3430 case GL_RGBA:
3431 case GL_RGBA_INTEGER_EXT:
3432 set_swizzle(swizzle, 0, 1, 2, 3);
3433 return true;
3434 case GL_BGRA:
3435 case GL_BGRA_INTEGER_EXT:
3436 set_swizzle(swizzle, 2, 1, 0, 3);
3437 return true;
3438 case GL_ABGR_EXT:
3439 set_swizzle(swizzle, 3, 2, 1, 0);
3440 return true;
3441 case GL_RGB:
3442 case GL_RGB_INTEGER_EXT:
3443 set_swizzle(swizzle, 0, 1, 2, 5);
3444 return true;
3445 case GL_BGR:
3446 case GL_BGR_INTEGER_EXT:
3447 set_swizzle(swizzle, 2, 1, 0, 5);
3448 return true;
3449 case GL_LUMINANCE_ALPHA:
3450 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3451 set_swizzle(swizzle, 0, 0, 0, 1);
3452 return true;
3453 case GL_RG:
3454 case GL_RG_INTEGER:
3455 set_swizzle(swizzle, 0, 1, 4, 5);
3456 return true;
3457 case GL_RED:
3458 case GL_RED_INTEGER_EXT:
3459 set_swizzle(swizzle, 0, 4, 4, 5);
3460 return true;
3461 case GL_GREEN:
3462 case GL_GREEN_INTEGER_EXT:
3463 set_swizzle(swizzle, 4, 0, 4, 5);
3464 return true;
3465 case GL_BLUE:
3466 case GL_BLUE_INTEGER_EXT:
3467 set_swizzle(swizzle, 4, 4, 0, 5);
3468 return true;
3469 case GL_ALPHA:
3470 case GL_ALPHA_INTEGER_EXT:
3471 set_swizzle(swizzle, 4, 4, 4, 0);
3472 return true;
3473 case GL_LUMINANCE:
3474 case GL_LUMINANCE_INTEGER_EXT:
3475 set_swizzle(swizzle, 0, 0, 0, 5);
3476 return true;
3477 case GL_INTENSITY:
3478 set_swizzle(swizzle, 0, 0, 0, 0);
3479 return true;
3480 default:
3481 return false;
3482 }
3483 }
3484
3485 /**
3486 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3487 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3488 * otherwise (for non-array formats).
3489 *
3490 * This function will typically be used to compute a mesa format from a GL type
3491 * so we can then call _mesa_format_convert. This function does
3492 * not consider byte swapping, so it returns types assuming that no byte
3493 * swapping is involved. If byte swapping is involved then clients are supposed
3494 * to handle that on their side before calling _mesa_format_convert.
3495 *
3496 * This function returns an uint32_t that can pack a mesa_format or a
3497 * mesa_array_format. Clients must check the mesa array format bit
3498 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3499 * format is a mesa_array_format or a mesa_format.
3500 */
3501 uint32_t
3502 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3503 {
3504 bool is_array_format = true;
3505 uint8_t swizzle[4];
3506 bool normalized = false, is_float = false, is_signed = false;
3507 int num_channels = 0, type_size = 0;
3508
3509 /* Extract array format type information from the OpenGL data type */
3510 switch (type) {
3511 case GL_UNSIGNED_BYTE:
3512 type_size = 1;
3513 break;
3514 case GL_BYTE:
3515 type_size = 1;
3516 is_signed = true;
3517 break;
3518 case GL_UNSIGNED_SHORT:
3519 type_size = 2;
3520 break;
3521 case GL_SHORT:
3522 type_size = 2;
3523 is_signed = true;
3524 break;
3525 case GL_UNSIGNED_INT:
3526 type_size = 4;
3527 break;
3528 case GL_INT:
3529 type_size = 4;
3530 is_signed = true;
3531 break;
3532 case GL_HALF_FLOAT:
3533 case GL_HALF_FLOAT_OES:
3534 type_size = 2;
3535 is_signed = true;
3536 is_float = true;
3537 break;
3538 case GL_FLOAT:
3539 type_size = 4;
3540 is_signed = true;
3541 is_float = true;
3542 break;
3543 default:
3544 is_array_format = false;
3545 break;
3546 }
3547
3548 /* Extract array format swizzle information from the OpenGL format */
3549 if (is_array_format)
3550 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3551
3552 /* If this is an array format type after checking data type and format,
3553 * create the array format
3554 */
3555 if (is_array_format) {
3556 normalized = !_mesa_is_enum_format_integer(format);
3557 num_channels = _mesa_components_in_format(format);
3558
3559 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
3560 normalized, num_channels,
3561 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3562 }
3563
3564 /* Otherwise this is not an array format, so return the mesa_format
3565 * matching the OpenGL format and data type
3566 */
3567 switch (type) {
3568 case GL_UNSIGNED_SHORT_5_6_5:
3569 if (format == GL_RGB)
3570 return MESA_FORMAT_B5G6R5_UNORM;
3571 else if (format == GL_BGR)
3572 return MESA_FORMAT_R5G6B5_UNORM;
3573 else if (format == GL_RGB_INTEGER)
3574 return MESA_FORMAT_B5G6R5_UINT;
3575 break;
3576 case GL_UNSIGNED_SHORT_5_6_5_REV:
3577 if (format == GL_RGB)
3578 return MESA_FORMAT_R5G6B5_UNORM;
3579 else if (format == GL_BGR)
3580 return MESA_FORMAT_B5G6R5_UNORM;
3581 else if (format == GL_RGB_INTEGER)
3582 return MESA_FORMAT_R5G6B5_UINT;
3583 break;
3584 case GL_UNSIGNED_SHORT_4_4_4_4:
3585 if (format == GL_RGBA)
3586 return MESA_FORMAT_A4B4G4R4_UNORM;
3587 else if (format == GL_BGRA)
3588 return MESA_FORMAT_A4R4G4B4_UNORM;
3589 else if (format == GL_ABGR_EXT)
3590 return MESA_FORMAT_R4G4B4A4_UNORM;
3591 else if (format == GL_RGBA_INTEGER)
3592 return MESA_FORMAT_A4B4G4R4_UINT;
3593 else if (format == GL_BGRA_INTEGER)
3594 return MESA_FORMAT_A4R4G4B4_UINT;
3595 break;
3596 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3597 if (format == GL_RGBA)
3598 return MESA_FORMAT_R4G4B4A4_UNORM;
3599 else if (format == GL_BGRA)
3600 return MESA_FORMAT_B4G4R4A4_UNORM;
3601 else if (format == GL_ABGR_EXT)
3602 return MESA_FORMAT_A4B4G4R4_UNORM;
3603 else if (format == GL_RGBA_INTEGER)
3604 return MESA_FORMAT_R4G4B4A4_UINT;
3605 else if (format == GL_BGRA_INTEGER)
3606 return MESA_FORMAT_B4G4R4A4_UINT;
3607 break;
3608 case GL_UNSIGNED_SHORT_5_5_5_1:
3609 if (format == GL_RGBA)
3610 return MESA_FORMAT_A1B5G5R5_UNORM;
3611 else if (format == GL_BGRA)
3612 return MESA_FORMAT_A1R5G5B5_UNORM;
3613 else if (format == GL_RGBA_INTEGER)
3614 return MESA_FORMAT_A1B5G5R5_UINT;
3615 else if (format == GL_BGRA_INTEGER)
3616 return MESA_FORMAT_A1R5G5B5_UINT;
3617 break;
3618 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3619 if (format == GL_RGBA)
3620 return MESA_FORMAT_R5G5B5A1_UNORM;
3621 else if (format == GL_BGRA)
3622 return MESA_FORMAT_B5G5R5A1_UNORM;
3623 else if (format == GL_RGBA_INTEGER)
3624 return MESA_FORMAT_R5G5B5A1_UINT;
3625 else if (format == GL_BGRA_INTEGER)
3626 return MESA_FORMAT_B5G5R5A1_UINT;
3627 break;
3628 case GL_UNSIGNED_BYTE_3_3_2:
3629 if (format == GL_RGB)
3630 return MESA_FORMAT_B2G3R3_UNORM;
3631 else if (format == GL_RGB_INTEGER)
3632 return MESA_FORMAT_B2G3R3_UINT;
3633 break;
3634 case GL_UNSIGNED_BYTE_2_3_3_REV:
3635 if (format == GL_RGB)
3636 return MESA_FORMAT_R3G3B2_UNORM;
3637 else if (format == GL_RGB_INTEGER)
3638 return MESA_FORMAT_R3G3B2_UINT;
3639 break;
3640 case GL_UNSIGNED_INT_5_9_9_9_REV:
3641 if (format == GL_RGB)
3642 return MESA_FORMAT_R9G9B9E5_FLOAT;
3643 break;
3644 case GL_UNSIGNED_INT_10_10_10_2:
3645 if (format == GL_RGBA)
3646 return MESA_FORMAT_A2B10G10R10_UNORM;
3647 else if (format == GL_RGBA_INTEGER)
3648 return MESA_FORMAT_A2B10G10R10_UINT;
3649 else if (format == GL_BGRA)
3650 return MESA_FORMAT_A2R10G10B10_UNORM;
3651 else if (format == GL_BGRA_INTEGER)
3652 return MESA_FORMAT_A2R10G10B10_UINT;
3653 break;
3654 case GL_UNSIGNED_INT_2_10_10_10_REV:
3655 if (format == GL_RGB)
3656 return MESA_FORMAT_R10G10B10X2_UNORM;
3657 if (format == GL_RGBA)
3658 return MESA_FORMAT_R10G10B10A2_UNORM;
3659 else if (format == GL_RGBA_INTEGER)
3660 return MESA_FORMAT_R10G10B10A2_UINT;
3661 else if (format == GL_BGRA)
3662 return MESA_FORMAT_B10G10R10A2_UNORM;
3663 else if (format == GL_BGRA_INTEGER)
3664 return MESA_FORMAT_B10G10R10A2_UINT;
3665 break;
3666 case GL_UNSIGNED_INT_8_8_8_8:
3667 if (format == GL_RGBA)
3668 return MESA_FORMAT_A8B8G8R8_UNORM;
3669 else if (format == GL_BGRA)
3670 return MESA_FORMAT_A8R8G8B8_UNORM;
3671 else if (format == GL_ABGR_EXT)
3672 return MESA_FORMAT_R8G8B8A8_UNORM;
3673 else if (format == GL_RGBA_INTEGER)
3674 return MESA_FORMAT_A8B8G8R8_UINT;
3675 else if (format == GL_BGRA_INTEGER)
3676 return MESA_FORMAT_A8R8G8B8_UINT;
3677 break;
3678 case GL_UNSIGNED_INT_8_8_8_8_REV:
3679 if (format == GL_RGBA)
3680 return MESA_FORMAT_R8G8B8A8_UNORM;
3681 else if (format == GL_BGRA)
3682 return MESA_FORMAT_B8G8R8A8_UNORM;
3683 else if (format == GL_ABGR_EXT)
3684 return MESA_FORMAT_A8B8G8R8_UNORM;
3685 else if (format == GL_RGBA_INTEGER)
3686 return MESA_FORMAT_R8G8B8A8_UINT;
3687 else if (format == GL_BGRA_INTEGER)
3688 return MESA_FORMAT_B8G8R8A8_UINT;
3689 break;
3690 case GL_UNSIGNED_SHORT_8_8_MESA:
3691 if (format == GL_YCBCR_MESA)
3692 return MESA_FORMAT_YCBCR;
3693 break;
3694 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3695 if (format == GL_YCBCR_MESA)
3696 return MESA_FORMAT_YCBCR_REV;
3697 break;
3698 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3699 if (format == GL_RGB)
3700 return MESA_FORMAT_R11G11B10_FLOAT;
3701 break;
3702 case GL_FLOAT:
3703 if (format == GL_DEPTH_COMPONENT)
3704 return MESA_FORMAT_Z_FLOAT32;
3705 break;
3706 case GL_UNSIGNED_INT:
3707 if (format == GL_DEPTH_COMPONENT)
3708 return MESA_FORMAT_Z_UNORM32;
3709 break;
3710 case GL_UNSIGNED_SHORT:
3711 if (format == GL_DEPTH_COMPONENT)
3712 return MESA_FORMAT_Z_UNORM16;
3713 break;
3714 case GL_UNSIGNED_INT_24_8:
3715 if (format == GL_DEPTH_STENCIL)
3716 return MESA_FORMAT_Z24_UNORM_S8_UINT;
3717 break;
3718 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3719 if (format == GL_DEPTH_STENCIL)
3720 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3721 break;
3722 default:
3723 break;
3724 }
3725
3726 /* If we got here it means that we could not find a Mesa format that
3727 * matches the GL format/type provided. We may need to add a new Mesa
3728 * format in that case.
3729 */
3730 unreachable("Unsupported format");
3731 }
3732
3733 uint32_t
3734 _mesa_tex_format_from_format_and_type(const struct gl_context *ctx,
3735 GLenum gl_format, GLenum type)
3736 {
3737 mesa_format format = _mesa_format_from_format_and_type(gl_format, type);
3738
3739 if (_mesa_format_is_mesa_array_format(format))
3740 format = _mesa_format_from_array_format(format);
3741
3742 if (format == MESA_FORMAT_NONE || !ctx->TextureFormatSupported[format])
3743 return MESA_FORMAT_NONE;
3744
3745 return format;
3746 }
3747
3748 /**
3749 * Returns true if \p internal_format is a sized internal format that
3750 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
3751 */
3752 bool
3753 _mesa_is_es3_color_renderable(const struct gl_context *ctx,
3754 GLenum internal_format)
3755 {
3756 switch (internal_format) {
3757 case GL_R8:
3758 case GL_RG8:
3759 case GL_RGB8:
3760 case GL_RGB565:
3761 case GL_RGBA4:
3762 case GL_RGB5_A1:
3763 case GL_RGBA8:
3764 case GL_RGB10_A2:
3765 case GL_RGB10_A2UI:
3766 case GL_SRGB8_ALPHA8:
3767 case GL_R16F:
3768 case GL_RG16F:
3769 case GL_RGBA16F:
3770 case GL_R32F:
3771 case GL_RG32F:
3772 case GL_RGBA32F:
3773 case GL_R11F_G11F_B10F:
3774 case GL_R8I:
3775 case GL_R8UI:
3776 case GL_R16I:
3777 case GL_R16UI:
3778 case GL_R32I:
3779 case GL_R32UI:
3780 case GL_RG8I:
3781 case GL_RG8UI:
3782 case GL_RG16I:
3783 case GL_RG16UI:
3784 case GL_RG32I:
3785 case GL_RG32UI:
3786 case GL_RGBA8I:
3787 case GL_RGBA8UI:
3788 case GL_RGBA16I:
3789 case GL_RGBA16UI:
3790 case GL_RGBA32I:
3791 case GL_RGBA32UI:
3792 return true;
3793 case GL_R16:
3794 case GL_RG16:
3795 case GL_RGBA16:
3796 return _mesa_has_EXT_texture_norm16(ctx);
3797 default:
3798 return false;
3799 }
3800 }
3801
3802 /**
3803 * Returns true if \p internal_format is a sized internal format that
3804 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
3805 */
3806 bool
3807 _mesa_is_es3_texture_filterable(const struct gl_context *ctx,
3808 GLenum internal_format)
3809 {
3810 switch (internal_format) {
3811 case GL_R8:
3812 case GL_R8_SNORM:
3813 case GL_RG8:
3814 case GL_RG8_SNORM:
3815 case GL_RGB8:
3816 case GL_RGB8_SNORM:
3817 case GL_RGB565:
3818 case GL_RGBA4:
3819 case GL_RGB5_A1:
3820 case GL_RGBA8:
3821 case GL_RGBA8_SNORM:
3822 case GL_RGB10_A2:
3823 case GL_SRGB8:
3824 case GL_SRGB8_ALPHA8:
3825 case GL_R16F:
3826 case GL_RG16F:
3827 case GL_RGB16F:
3828 case GL_RGBA16F:
3829 case GL_R11F_G11F_B10F:
3830 case GL_RGB9_E5:
3831 return true;
3832 case GL_R16:
3833 case GL_R16_SNORM:
3834 case GL_RG16:
3835 case GL_RG16_SNORM:
3836 case GL_RGB16:
3837 case GL_RGB16_SNORM:
3838 case GL_RGBA16:
3839 case GL_RGBA16_SNORM:
3840 return _mesa_has_EXT_texture_norm16(ctx);
3841 case GL_R32F:
3842 case GL_RG32F:
3843 case GL_RGB32F:
3844 case GL_RGBA32F:
3845 /* The OES_texture_float_linear spec says:
3846 *
3847 * "When implemented against OpenGL ES 3.0 or later versions, sized
3848 * 32-bit floating-point formats become texture-filterable. This
3849 * should be noted by, for example, checking the ``TF'' column of
3850 * table 8.13 in the ES 3.1 Specification (``Correspondence of sized
3851 * internal formats to base internal formats ... and use cases ...'')
3852 * for the R32F, RG32F, RGB32F, and RGBA32F formats."
3853 */
3854 return ctx->Extensions.OES_texture_float_linear;
3855 default:
3856 return false;
3857 }
3858 }