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mesa/main: Expose EXT_texture_compression_s3tc_srgb
[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_has_S3_s3tc(ctx);
1356 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1357 return _mesa_has_ATI_texture_compression_3dc(ctx);
1358 case GL_PALETTE4_RGB8_OES:
1359 case GL_PALETTE4_RGBA8_OES:
1360 case GL_PALETTE4_R5_G6_B5_OES:
1361 case GL_PALETTE4_RGBA4_OES:
1362 case GL_PALETTE4_RGB5_A1_OES:
1363 case GL_PALETTE8_RGB8_OES:
1364 case GL_PALETTE8_RGBA8_OES:
1365 case GL_PALETTE8_R5_G6_B5_OES:
1366 case GL_PALETTE8_RGBA4_OES:
1367 case GL_PALETTE8_RGB5_A1_OES:
1368 return ctx->API == API_OPENGLES;
1369 }
1370
1371 switch (_mesa_get_format_layout(m_format)) {
1372 case MESA_FORMAT_LAYOUT_S3TC:
1373 if (_mesa_get_format_color_encoding(m_format) == GL_LINEAR) {
1374 return _mesa_has_EXT_texture_compression_s3tc(ctx);
1375 } else {
1376 return (_mesa_has_EXT_texture_sRGB(ctx) ||
1377 _mesa_has_EXT_texture_compression_s3tc_srgb(ctx)) &&
1378 _mesa_has_EXT_texture_compression_s3tc(ctx);
1379 }
1380 case MESA_FORMAT_LAYOUT_FXT1:
1381 return _mesa_has_3DFX_texture_compression_FXT1(ctx);
1382 case MESA_FORMAT_LAYOUT_RGTC:
1383 return _mesa_has_ARB_texture_compression_rgtc(ctx) ||
1384 _mesa_has_EXT_texture_compression_rgtc(ctx);
1385 case MESA_FORMAT_LAYOUT_LATC:
1386 return _mesa_has_EXT_texture_compression_latc(ctx);
1387 case MESA_FORMAT_LAYOUT_ETC1:
1388 return _mesa_has_OES_compressed_ETC1_RGB8_texture(ctx);
1389 case MESA_FORMAT_LAYOUT_ETC2:
1390 return _mesa_is_gles3(ctx) || _mesa_has_ARB_ES3_compatibility(ctx);
1391 case MESA_FORMAT_LAYOUT_BPTC:
1392 return _mesa_has_ARB_texture_compression_bptc(ctx) ||
1393 _mesa_has_EXT_texture_compression_bptc(ctx);
1394 case MESA_FORMAT_LAYOUT_ASTC:
1395 return _mesa_has_KHR_texture_compression_astc_ldr(ctx);
1396 default:
1397 return GL_FALSE;
1398 }
1399 }
1400
1401 /**
1402 * Test if the given format represents an sRGB format.
1403 * \param format the GL format (can be an internal format)
1404 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1405 */
1406 GLboolean
1407 _mesa_is_srgb_format(GLenum format)
1408 {
1409 switch (format) {
1410 case GL_SRGB:
1411 case GL_SRGB8:
1412 case GL_SRGB_ALPHA:
1413 case GL_SRGB8_ALPHA8:
1414 case GL_COMPRESSED_SRGB:
1415 case GL_COMPRESSED_SRGB_ALPHA:
1416 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1417 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1418 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1419 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1420 case GL_COMPRESSED_SRGB8_ETC2:
1421 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1422 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1423 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1424 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1425 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1426 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1427 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1428 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1429 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1430 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1431 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1432 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1433 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1434 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1435 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1436 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1437 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1438 return GL_TRUE;
1439 default:
1440 break;
1441 }
1442
1443 return GL_FALSE;
1444 }
1445
1446 /**
1447 * Convert various unpack formats to the corresponding base format.
1448 */
1449 GLenum
1450 _mesa_unpack_format_to_base_format(GLenum format)
1451 {
1452 switch(format) {
1453 case GL_RED_INTEGER:
1454 return GL_RED;
1455 case GL_GREEN_INTEGER:
1456 return GL_GREEN;
1457 case GL_BLUE_INTEGER:
1458 return GL_BLUE;
1459 case GL_ALPHA_INTEGER:
1460 return GL_ALPHA;
1461 case GL_RG_INTEGER:
1462 return GL_RG;
1463 case GL_RGB_INTEGER:
1464 return GL_RGB;
1465 case GL_RGBA_INTEGER:
1466 return GL_RGBA;
1467 case GL_BGR_INTEGER:
1468 return GL_BGR;
1469 case GL_BGRA_INTEGER:
1470 return GL_BGRA;
1471 case GL_LUMINANCE_INTEGER_EXT:
1472 return GL_LUMINANCE;
1473 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1474 return GL_LUMINANCE_ALPHA;
1475 case GL_RED:
1476 case GL_GREEN:
1477 case GL_BLUE:
1478 case GL_RG:
1479 case GL_RGB:
1480 case GL_RGBA:
1481 case GL_BGR:
1482 case GL_BGRA:
1483 case GL_ALPHA:
1484 case GL_LUMINANCE:
1485 case GL_LUMINANCE_ALPHA:
1486 default:
1487 return format;
1488 }
1489 }
1490
1491 /**
1492 * Convert various base formats to the corresponding integer format.
1493 */
1494 GLenum
1495 _mesa_base_format_to_integer_format(GLenum format)
1496 {
1497 switch(format) {
1498 case GL_RED:
1499 return GL_RED_INTEGER;
1500 case GL_GREEN:
1501 return GL_GREEN_INTEGER;
1502 case GL_BLUE:
1503 return GL_BLUE_INTEGER;
1504 case GL_RG:
1505 return GL_RG_INTEGER;
1506 case GL_RGB:
1507 return GL_RGB_INTEGER;
1508 case GL_RGBA:
1509 return GL_RGBA_INTEGER;
1510 case GL_BGR:
1511 return GL_BGR_INTEGER;
1512 case GL_BGRA:
1513 return GL_BGRA_INTEGER;
1514 case GL_ALPHA:
1515 return GL_ALPHA_INTEGER;
1516 case GL_LUMINANCE:
1517 return GL_LUMINANCE_INTEGER_EXT;
1518 case GL_LUMINANCE_ALPHA:
1519 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1520 }
1521
1522 return format;
1523 }
1524
1525
1526 /**
1527 * Does the given base texture/renderbuffer format have the channel
1528 * named by 'pname'?
1529 */
1530 GLboolean
1531 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1532 {
1533 switch (pname) {
1534 case GL_TEXTURE_RED_SIZE:
1535 case GL_TEXTURE_RED_TYPE:
1536 case GL_RENDERBUFFER_RED_SIZE_EXT:
1537 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1538 case GL_INTERNALFORMAT_RED_SIZE:
1539 case GL_INTERNALFORMAT_RED_TYPE:
1540 if (base_format == GL_RED ||
1541 base_format == GL_RG ||
1542 base_format == GL_RGB ||
1543 base_format == GL_RGBA) {
1544 return GL_TRUE;
1545 }
1546 return GL_FALSE;
1547 case GL_TEXTURE_GREEN_SIZE:
1548 case GL_TEXTURE_GREEN_TYPE:
1549 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1550 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1551 case GL_INTERNALFORMAT_GREEN_SIZE:
1552 case GL_INTERNALFORMAT_GREEN_TYPE:
1553 if (base_format == GL_RG ||
1554 base_format == GL_RGB ||
1555 base_format == GL_RGBA) {
1556 return GL_TRUE;
1557 }
1558 return GL_FALSE;
1559 case GL_TEXTURE_BLUE_SIZE:
1560 case GL_TEXTURE_BLUE_TYPE:
1561 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1562 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1563 case GL_INTERNALFORMAT_BLUE_SIZE:
1564 case GL_INTERNALFORMAT_BLUE_TYPE:
1565 if (base_format == GL_RGB ||
1566 base_format == GL_RGBA) {
1567 return GL_TRUE;
1568 }
1569 return GL_FALSE;
1570 case GL_TEXTURE_ALPHA_SIZE:
1571 case GL_TEXTURE_ALPHA_TYPE:
1572 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1573 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1574 case GL_INTERNALFORMAT_ALPHA_SIZE:
1575 case GL_INTERNALFORMAT_ALPHA_TYPE:
1576 if (base_format == GL_RGBA ||
1577 base_format == GL_ALPHA ||
1578 base_format == GL_LUMINANCE_ALPHA) {
1579 return GL_TRUE;
1580 }
1581 return GL_FALSE;
1582 case GL_TEXTURE_LUMINANCE_SIZE:
1583 case GL_TEXTURE_LUMINANCE_TYPE:
1584 if (base_format == GL_LUMINANCE ||
1585 base_format == GL_LUMINANCE_ALPHA) {
1586 return GL_TRUE;
1587 }
1588 return GL_FALSE;
1589 case GL_TEXTURE_INTENSITY_SIZE:
1590 case GL_TEXTURE_INTENSITY_TYPE:
1591 if (base_format == GL_INTENSITY) {
1592 return GL_TRUE;
1593 }
1594 return GL_FALSE;
1595 case GL_TEXTURE_DEPTH_SIZE:
1596 case GL_TEXTURE_DEPTH_TYPE:
1597 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1598 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1599 case GL_INTERNALFORMAT_DEPTH_SIZE:
1600 case GL_INTERNALFORMAT_DEPTH_TYPE:
1601 if (base_format == GL_DEPTH_STENCIL ||
1602 base_format == GL_DEPTH_COMPONENT) {
1603 return GL_TRUE;
1604 }
1605 return GL_FALSE;
1606 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1607 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1608 case GL_INTERNALFORMAT_STENCIL_SIZE:
1609 case GL_INTERNALFORMAT_STENCIL_TYPE:
1610 if (base_format == GL_DEPTH_STENCIL ||
1611 base_format == GL_STENCIL_INDEX) {
1612 return GL_TRUE;
1613 }
1614 return GL_FALSE;
1615 default:
1616 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1617 __func__, pname);
1618 return GL_FALSE;
1619 }
1620
1621 return GL_FALSE;
1622 }
1623
1624
1625 /**
1626 * If format is a generic compressed format, return the corresponding
1627 * non-compressed format. For other formats, return the format as-is.
1628 */
1629 GLenum
1630 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1631 {
1632 switch (format) {
1633 case GL_COMPRESSED_RED:
1634 return GL_RED;
1635 case GL_COMPRESSED_RG:
1636 return GL_RG;
1637 case GL_COMPRESSED_RGB:
1638 return GL_RGB;
1639 case GL_COMPRESSED_RGBA:
1640 return GL_RGBA;
1641 case GL_COMPRESSED_ALPHA:
1642 return GL_ALPHA;
1643 case GL_COMPRESSED_LUMINANCE:
1644 return GL_LUMINANCE;
1645 case GL_COMPRESSED_LUMINANCE_ALPHA:
1646 return GL_LUMINANCE_ALPHA;
1647 case GL_COMPRESSED_INTENSITY:
1648 return GL_INTENSITY;
1649 /* sRGB formats */
1650 case GL_COMPRESSED_SRGB:
1651 return GL_SRGB;
1652 case GL_COMPRESSED_SRGB_ALPHA:
1653 return GL_SRGB_ALPHA;
1654 case GL_COMPRESSED_SLUMINANCE:
1655 return GL_SLUMINANCE;
1656 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1657 return GL_SLUMINANCE_ALPHA;
1658 default:
1659 return format;
1660 }
1661 }
1662
1663
1664 /**
1665 * Return the equivalent non-generic internal format.
1666 * This is useful for comparing whether two internal formats are equivalent.
1667 */
1668 GLenum
1669 _mesa_get_nongeneric_internalformat(GLenum format)
1670 {
1671 switch (format) {
1672 /* GL 1.1 formats. */
1673 case 4:
1674 case GL_RGBA:
1675 return GL_RGBA8;
1676 case 3:
1677 case GL_RGB:
1678 return GL_RGB8;
1679 case 2:
1680 case GL_LUMINANCE_ALPHA:
1681 return GL_LUMINANCE8_ALPHA8;
1682 case 1:
1683 case GL_LUMINANCE:
1684 return GL_LUMINANCE8;
1685 case GL_ALPHA:
1686 return GL_ALPHA8;
1687 case GL_INTENSITY:
1688 return GL_INTENSITY8;
1689
1690 /* GL_ARB_texture_rg */
1691 case GL_RED:
1692 return GL_R8;
1693 case GL_RG:
1694 return GL_RG8;
1695
1696 /* GL_EXT_texture_sRGB */
1697 case GL_SRGB:
1698 return GL_SRGB8;
1699 case GL_SRGB_ALPHA:
1700 return GL_SRGB8_ALPHA8;
1701 case GL_SLUMINANCE:
1702 return GL_SLUMINANCE8;
1703 case GL_SLUMINANCE_ALPHA:
1704 return GL_SLUMINANCE8_ALPHA8;
1705
1706 /* GL_EXT_texture_snorm */
1707 case GL_RGBA_SNORM:
1708 return GL_RGBA8_SNORM;
1709 case GL_RGB_SNORM:
1710 return GL_RGB8_SNORM;
1711 case GL_RG_SNORM:
1712 return GL_RG8_SNORM;
1713 case GL_RED_SNORM:
1714 return GL_R8_SNORM;
1715 case GL_LUMINANCE_ALPHA_SNORM:
1716 return GL_LUMINANCE8_ALPHA8_SNORM;
1717 case GL_LUMINANCE_SNORM:
1718 return GL_LUMINANCE8_SNORM;
1719 case GL_ALPHA_SNORM:
1720 return GL_ALPHA8_SNORM;
1721 case GL_INTENSITY_SNORM:
1722 return GL_INTENSITY8_SNORM;
1723
1724 default:
1725 return format;
1726 }
1727 }
1728
1729
1730 /**
1731 * Convert an sRGB internal format to linear.
1732 */
1733 GLenum
1734 _mesa_get_linear_internalformat(GLenum format)
1735 {
1736 switch (format) {
1737 case GL_SRGB:
1738 return GL_RGB;
1739 case GL_SRGB_ALPHA:
1740 return GL_RGBA;
1741 case GL_SRGB8:
1742 return GL_RGB8;
1743 case GL_SRGB8_ALPHA8:
1744 return GL_RGBA8;
1745 case GL_SLUMINANCE8:
1746 return GL_LUMINANCE8;
1747 case GL_SLUMINANCE:
1748 return GL_LUMINANCE;
1749 case GL_SLUMINANCE_ALPHA:
1750 return GL_LUMINANCE_ALPHA;
1751 case GL_SLUMINANCE8_ALPHA8:
1752 return GL_LUMINANCE8_ALPHA8;
1753 default:
1754 return format;
1755 }
1756 }
1757
1758
1759 /**
1760 * Do error checking of format/type combinations for glReadPixels,
1761 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1762 * and type values, we may either generate GL_INVALID_OPERATION or
1763 * GL_INVALID_ENUM.
1764 *
1765 * \param format pixel format.
1766 * \param type pixel type.
1767 *
1768 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1769 */
1770 GLenum
1771 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1772 GLenum format, GLenum type)
1773 {
1774 /* From OpenGL 3.3 spec, page 220:
1775 * "If the format is DEPTH_STENCIL, then values are taken from
1776 * both the depth buffer and the stencil buffer. If there is no
1777 * depth buffer or if there is no stencil buffer, then the error
1778 * INVALID_OPERATION occurs. If the type parameter is not
1779 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1780 * error INVALID_ENUM occurs."
1781 *
1782 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1783 * cannot be used to read depth or stencil in that API.
1784 */
1785 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1786 && type != GL_UNSIGNED_INT_24_8
1787 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1788 return GL_INVALID_ENUM;
1789
1790 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1791 switch (type) {
1792 case GL_BITMAP:
1793 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1794 return GL_INVALID_ENUM;
1795 }
1796 break;
1797
1798 case GL_UNSIGNED_BYTE_3_3_2:
1799 case GL_UNSIGNED_BYTE_2_3_3_REV:
1800 case GL_UNSIGNED_SHORT_5_6_5:
1801 case GL_UNSIGNED_SHORT_5_6_5_REV:
1802 if (format == GL_RGB) {
1803 break; /* OK */
1804 }
1805 if (format == GL_RGB_INTEGER_EXT &&
1806 _mesa_has_texture_rgb10_a2ui(ctx)) {
1807 break; /* OK */
1808 }
1809 return GL_INVALID_OPERATION;
1810
1811 case GL_UNSIGNED_SHORT_4_4_4_4:
1812 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1813 case GL_UNSIGNED_INT_8_8_8_8:
1814 case GL_UNSIGNED_INT_8_8_8_8_REV:
1815 if (format == GL_RGBA ||
1816 format == GL_BGRA ||
1817 format == GL_ABGR_EXT) {
1818 break; /* OK */
1819 }
1820 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1821 _mesa_has_texture_rgb10_a2ui(ctx)) {
1822 break; /* OK */
1823 }
1824 return GL_INVALID_OPERATION;
1825
1826 case GL_UNSIGNED_SHORT_5_5_5_1:
1827 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1828 case GL_UNSIGNED_INT_10_10_10_2:
1829 case GL_UNSIGNED_INT_2_10_10_10_REV:
1830 if (format == GL_RGBA ||
1831 format == GL_BGRA) {
1832 break; /* OK */
1833 }
1834 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1835 _mesa_has_texture_rgb10_a2ui(ctx)) {
1836 break; /* OK */
1837 }
1838 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1839 ctx->API == API_OPENGLES2) {
1840 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1841 }
1842 return GL_INVALID_OPERATION;
1843
1844 case GL_UNSIGNED_INT_24_8:
1845 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1846 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1847 return GL_NO_ERROR;
1848
1849 if (format != GL_DEPTH_STENCIL) {
1850 return GL_INVALID_OPERATION;
1851 }
1852 return GL_NO_ERROR;
1853
1854 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1855 if (!_mesa_has_float_depth_buffer(ctx)) {
1856 return GL_INVALID_ENUM;
1857 }
1858 if (format != GL_DEPTH_STENCIL) {
1859 return GL_INVALID_OPERATION;
1860 }
1861 return GL_NO_ERROR;
1862
1863 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1864 if (!_mesa_has_packed_float(ctx)) {
1865 return GL_INVALID_ENUM;
1866 }
1867 if (format != GL_RGB) {
1868 return GL_INVALID_OPERATION;
1869 }
1870 return GL_NO_ERROR;
1871
1872 case GL_HALF_FLOAT_OES:
1873 switch (format) {
1874 case GL_RGBA:
1875 case GL_RGB:
1876 case GL_LUMINANCE_ALPHA:
1877 case GL_LUMINANCE:
1878 case GL_ALPHA:
1879 return GL_NO_ERROR;
1880 case GL_RG:
1881 case GL_RED:
1882 if (_mesa_has_rg_textures(ctx))
1883 return GL_NO_ERROR;
1884 default:
1885 return GL_INVALID_OPERATION;
1886 }
1887
1888 default:
1889 ; /* fall-through */
1890 }
1891
1892 /* now, for each format, check the type for compatibility */
1893 switch (format) {
1894 case GL_COLOR_INDEX:
1895 case GL_STENCIL_INDEX:
1896 switch (type) {
1897 case GL_BITMAP:
1898 case GL_BYTE:
1899 case GL_UNSIGNED_BYTE:
1900 case GL_SHORT:
1901 case GL_UNSIGNED_SHORT:
1902 case GL_INT:
1903 case GL_UNSIGNED_INT:
1904 case GL_FLOAT:
1905 case GL_HALF_FLOAT:
1906 return GL_NO_ERROR;
1907 default:
1908 return GL_INVALID_ENUM;
1909 }
1910
1911 case GL_RED:
1912 case GL_GREEN:
1913 case GL_BLUE:
1914 case GL_ALPHA:
1915 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1916 case GL_INTENSITY:
1917 #endif
1918 case GL_LUMINANCE:
1919 case GL_LUMINANCE_ALPHA:
1920 case GL_DEPTH_COMPONENT:
1921 switch (type) {
1922 case GL_BYTE:
1923 case GL_UNSIGNED_BYTE:
1924 case GL_SHORT:
1925 case GL_UNSIGNED_SHORT:
1926 case GL_INT:
1927 case GL_UNSIGNED_INT:
1928 case GL_FLOAT:
1929 case GL_HALF_FLOAT:
1930 return GL_NO_ERROR;
1931 default:
1932 return GL_INVALID_ENUM;
1933 }
1934
1935 case GL_RG:
1936 if (!_mesa_has_rg_textures(ctx))
1937 return GL_INVALID_ENUM;
1938 switch (type) {
1939 case GL_BYTE:
1940 case GL_UNSIGNED_BYTE:
1941 case GL_SHORT:
1942 case GL_UNSIGNED_SHORT:
1943 case GL_INT:
1944 case GL_UNSIGNED_INT:
1945 case GL_FLOAT:
1946 case GL_HALF_FLOAT:
1947 return GL_NO_ERROR;
1948 default:
1949 return GL_INVALID_ENUM;
1950 }
1951
1952 case GL_RGB:
1953 switch (type) {
1954 case GL_BYTE:
1955 case GL_UNSIGNED_BYTE:
1956 case GL_SHORT:
1957 case GL_UNSIGNED_SHORT:
1958 case GL_INT:
1959 case GL_UNSIGNED_INT:
1960 case GL_FLOAT:
1961 case GL_UNSIGNED_BYTE_3_3_2:
1962 case GL_UNSIGNED_BYTE_2_3_3_REV:
1963 case GL_UNSIGNED_SHORT_5_6_5:
1964 case GL_UNSIGNED_SHORT_5_6_5_REV:
1965 case GL_HALF_FLOAT:
1966 return GL_NO_ERROR;
1967 case GL_UNSIGNED_INT_2_10_10_10_REV:
1968 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1969 return (ctx->API == API_OPENGLES2)
1970 ? GL_NO_ERROR : GL_INVALID_ENUM;
1971 case GL_UNSIGNED_INT_5_9_9_9_REV:
1972 return _mesa_has_texture_shared_exponent(ctx)
1973 ? GL_NO_ERROR : GL_INVALID_ENUM;
1974 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1975 return _mesa_has_packed_float(ctx)
1976 ? GL_NO_ERROR : GL_INVALID_ENUM;
1977 default:
1978 return GL_INVALID_ENUM;
1979 }
1980
1981 case GL_BGR:
1982 switch (type) {
1983 /* NOTE: no packed types are supported with BGR. That's
1984 * intentional, according to the GL spec.
1985 */
1986 case GL_BYTE:
1987 case GL_UNSIGNED_BYTE:
1988 case GL_SHORT:
1989 case GL_UNSIGNED_SHORT:
1990 case GL_INT:
1991 case GL_UNSIGNED_INT:
1992 case GL_FLOAT:
1993 case GL_HALF_FLOAT:
1994 return GL_NO_ERROR;
1995 default:
1996 return GL_INVALID_ENUM;
1997 }
1998
1999 case GL_RGBA:
2000 case GL_BGRA:
2001 switch (type) {
2002 case GL_BYTE:
2003 case GL_UNSIGNED_BYTE:
2004 case GL_SHORT:
2005 case GL_UNSIGNED_SHORT:
2006 case GL_INT:
2007 case GL_UNSIGNED_INT:
2008 case GL_FLOAT:
2009 case GL_UNSIGNED_SHORT_4_4_4_4:
2010 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2011 case GL_UNSIGNED_SHORT_5_5_5_1:
2012 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2013 case GL_UNSIGNED_INT_8_8_8_8:
2014 case GL_UNSIGNED_INT_8_8_8_8_REV:
2015 case GL_UNSIGNED_INT_10_10_10_2:
2016 case GL_UNSIGNED_INT_2_10_10_10_REV:
2017 case GL_HALF_FLOAT:
2018 return GL_NO_ERROR;
2019 default:
2020 return GL_INVALID_ENUM;
2021 }
2022
2023 case GL_ABGR_EXT:
2024 switch (type) {
2025 case GL_BYTE:
2026 case GL_UNSIGNED_BYTE:
2027 case GL_SHORT:
2028 case GL_UNSIGNED_SHORT:
2029 case GL_INT:
2030 case GL_UNSIGNED_INT:
2031 case GL_FLOAT:
2032 case GL_UNSIGNED_SHORT_4_4_4_4:
2033 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2034 case GL_UNSIGNED_INT_8_8_8_8:
2035 case GL_UNSIGNED_INT_8_8_8_8_REV:
2036 case GL_HALF_FLOAT:
2037 return GL_NO_ERROR;
2038 default:
2039 return GL_INVALID_ENUM;
2040 }
2041
2042 case GL_YCBCR_MESA:
2043 if (!_mesa_has_MESA_ycbcr_texture(ctx))
2044 return GL_INVALID_ENUM;
2045 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2046 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2047 return GL_NO_ERROR;
2048 else
2049 return GL_INVALID_OPERATION;
2050
2051 case GL_DEPTH_STENCIL:
2052 if (type == GL_UNSIGNED_INT_24_8)
2053 return GL_NO_ERROR;
2054 else if (_mesa_has_float_depth_buffer(ctx) &&
2055 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2056 return GL_NO_ERROR;
2057 else
2058 return GL_INVALID_ENUM;
2059
2060 /* integer-valued formats */
2061 case GL_RED_INTEGER_EXT:
2062 case GL_GREEN_INTEGER_EXT:
2063 case GL_BLUE_INTEGER_EXT:
2064 case GL_ALPHA_INTEGER_EXT:
2065 case GL_RG_INTEGER:
2066 switch (type) {
2067 case GL_BYTE:
2068 case GL_UNSIGNED_BYTE:
2069 case GL_SHORT:
2070 case GL_UNSIGNED_SHORT:
2071 case GL_INT:
2072 case GL_UNSIGNED_INT:
2073 return _mesa_has_integer_textures(ctx)
2074 ? GL_NO_ERROR : GL_INVALID_ENUM;
2075 default:
2076 return GL_INVALID_ENUM;
2077 }
2078
2079 case GL_RGB_INTEGER_EXT:
2080 switch (type) {
2081 case GL_BYTE:
2082 case GL_UNSIGNED_BYTE:
2083 case GL_SHORT:
2084 case GL_UNSIGNED_SHORT:
2085 case GL_INT:
2086 case GL_UNSIGNED_INT:
2087 return _mesa_has_integer_textures(ctx)
2088 ? GL_NO_ERROR : GL_INVALID_ENUM;
2089 case GL_UNSIGNED_BYTE_3_3_2:
2090 case GL_UNSIGNED_BYTE_2_3_3_REV:
2091 case GL_UNSIGNED_SHORT_5_6_5:
2092 case GL_UNSIGNED_SHORT_5_6_5_REV:
2093 return _mesa_has_texture_rgb10_a2ui(ctx)
2094 ? GL_NO_ERROR : GL_INVALID_ENUM;
2095 default:
2096 return GL_INVALID_ENUM;
2097 }
2098
2099 case GL_BGR_INTEGER_EXT:
2100 switch (type) {
2101 case GL_BYTE:
2102 case GL_UNSIGNED_BYTE:
2103 case GL_SHORT:
2104 case GL_UNSIGNED_SHORT:
2105 case GL_INT:
2106 case GL_UNSIGNED_INT:
2107 /* NOTE: no packed formats w/ BGR format */
2108 return _mesa_has_integer_textures(ctx)
2109 ? GL_NO_ERROR : GL_INVALID_ENUM;
2110 default:
2111 return GL_INVALID_ENUM;
2112 }
2113
2114 case GL_RGBA_INTEGER_EXT:
2115 case GL_BGRA_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 _mesa_has_integer_textures(ctx)
2124 ? GL_NO_ERROR : GL_INVALID_ENUM;
2125 case GL_UNSIGNED_SHORT_4_4_4_4:
2126 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2127 case GL_UNSIGNED_SHORT_5_5_5_1:
2128 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2129 case GL_UNSIGNED_INT_8_8_8_8:
2130 case GL_UNSIGNED_INT_8_8_8_8_REV:
2131 case GL_UNSIGNED_INT_10_10_10_2:
2132 case GL_UNSIGNED_INT_2_10_10_10_REV:
2133 return _mesa_has_texture_rgb10_a2ui(ctx)
2134 ? GL_NO_ERROR : GL_INVALID_ENUM;
2135 default:
2136 return GL_INVALID_ENUM;
2137 }
2138
2139 case GL_LUMINANCE_INTEGER_EXT:
2140 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2141 switch (type) {
2142 case GL_BYTE:
2143 case GL_UNSIGNED_BYTE:
2144 case GL_SHORT:
2145 case GL_UNSIGNED_SHORT:
2146 case GL_INT:
2147 case GL_UNSIGNED_INT:
2148 return _mesa_has_integer_textures(ctx)
2149 ? GL_NO_ERROR : GL_INVALID_ENUM;
2150 default:
2151 return GL_INVALID_ENUM;
2152 }
2153
2154 default:
2155 return GL_INVALID_ENUM;
2156 }
2157 return GL_NO_ERROR;
2158 }
2159
2160
2161 /**
2162 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2163 * and glTex[Sub]Image.
2164 * \return error code, or GL_NO_ERROR.
2165 */
2166 GLenum
2167 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2168 GLenum format, GLenum type,
2169 unsigned dimensions)
2170 {
2171 GLboolean type_valid = GL_TRUE;
2172
2173 switch (format) {
2174 case GL_RED:
2175 case GL_RG:
2176 if (!_mesa_has_rg_textures(ctx))
2177 return GL_INVALID_VALUE;
2178 /* fallthrough */
2179 case GL_ALPHA:
2180 case GL_LUMINANCE:
2181 case GL_LUMINANCE_ALPHA:
2182 type_valid = (type == GL_UNSIGNED_BYTE
2183 || type == GL_FLOAT
2184 || type == GL_HALF_FLOAT_OES);
2185 break;
2186
2187 case GL_RGB:
2188 type_valid = (type == GL_UNSIGNED_BYTE
2189 || type == GL_UNSIGNED_SHORT_5_6_5
2190 || type == GL_FLOAT
2191 || type == GL_HALF_FLOAT_OES);
2192 break;
2193
2194 case GL_RGBA:
2195 type_valid = (type == GL_UNSIGNED_BYTE
2196 || type == GL_UNSIGNED_SHORT_4_4_4_4
2197 || type == GL_UNSIGNED_SHORT_5_5_5_1
2198 || type == GL_FLOAT
2199 || type == GL_HALF_FLOAT_OES
2200 || (_mesa_has_texture_type_2_10_10_10_REV(ctx) &&
2201 type == GL_UNSIGNED_INT_2_10_10_10_REV));
2202 break;
2203
2204 case GL_DEPTH_COMPONENT:
2205 /* This format is filtered against invalid dimensionalities elsewhere.
2206 */
2207 type_valid = (type == GL_UNSIGNED_SHORT
2208 || type == GL_UNSIGNED_INT);
2209 break;
2210
2211 case GL_DEPTH_STENCIL:
2212 /* This format is filtered against invalid dimensionalities elsewhere.
2213 */
2214 type_valid = (type == GL_UNSIGNED_INT_24_8);
2215 break;
2216
2217 case GL_BGRA_EXT:
2218 type_valid = (type == GL_UNSIGNED_BYTE);
2219
2220 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2221 * the format does not appear to be allowed for 3D textures in OpenGL
2222 * ES.
2223 */
2224 if (dimensions != 2)
2225 return GL_INVALID_VALUE;
2226
2227 break;
2228
2229 default:
2230 return GL_INVALID_VALUE;
2231 }
2232
2233 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2234 }
2235
2236 /**
2237 * Return the simple base format for a given internal texture format.
2238 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2239 *
2240 * \param ctx GL context.
2241 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2242 *
2243 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2244 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2245 *
2246 * This is the format which is used during texture application (i.e. the
2247 * texture format and env mode determine the arithmetic used.
2248 */
2249 GLint
2250 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2251 {
2252 switch (internalFormat) {
2253 case GL_ALPHA:
2254 case GL_ALPHA4:
2255 case GL_ALPHA8:
2256 case GL_ALPHA12:
2257 case GL_ALPHA16:
2258 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2259 case 1:
2260 case GL_LUMINANCE:
2261 case GL_LUMINANCE4:
2262 case GL_LUMINANCE8:
2263 case GL_LUMINANCE12:
2264 case GL_LUMINANCE16:
2265 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2266 case 2:
2267 case GL_LUMINANCE_ALPHA:
2268 case GL_LUMINANCE4_ALPHA4:
2269 case GL_LUMINANCE6_ALPHA2:
2270 case GL_LUMINANCE8_ALPHA8:
2271 case GL_LUMINANCE12_ALPHA4:
2272 case GL_LUMINANCE12_ALPHA12:
2273 case GL_LUMINANCE16_ALPHA16:
2274 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2275 case GL_INTENSITY:
2276 case GL_INTENSITY4:
2277 case GL_INTENSITY8:
2278 case GL_INTENSITY12:
2279 case GL_INTENSITY16:
2280 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2281 case 3:
2282 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2283 case GL_RGB:
2284 case GL_R3_G3_B2:
2285 case GL_RGB4:
2286 case GL_RGB5:
2287 case GL_RGB8:
2288 case GL_RGB10:
2289 case GL_RGB12:
2290 case GL_RGB16:
2291 return GL_RGB;
2292 case 4:
2293 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2294 case GL_RGBA:
2295 case GL_RGBA2:
2296 case GL_RGBA4:
2297 case GL_RGB5_A1:
2298 case GL_RGBA8:
2299 case GL_RGB10_A2:
2300 case GL_RGBA12:
2301 case GL_RGBA16:
2302 return GL_RGBA;
2303 default:
2304 ; /* fallthrough */
2305 }
2306
2307 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2308 */
2309 if (_mesa_is_gles(ctx)) {
2310 switch (internalFormat) {
2311 case GL_BGRA:
2312 return GL_RGBA;
2313 default:
2314 ; /* fallthrough */
2315 }
2316 }
2317
2318 if (_mesa_has_ARB_ES2_compatibility(ctx) ||
2319 _mesa_has_OES_framebuffer_object(ctx) ||
2320 ctx->API == API_OPENGLES2) {
2321 switch (internalFormat) {
2322 case GL_RGB565:
2323 return GL_RGB;
2324 default:
2325 ; /* fallthrough */
2326 }
2327 }
2328
2329 if (_mesa_has_ARB_depth_texture(ctx) || _mesa_has_OES_depth_texture(ctx) ||
2330 ctx->API == API_OPENGL_CORE) {
2331 switch (internalFormat) {
2332 case GL_DEPTH_COMPONENT:
2333 case GL_DEPTH_COMPONENT16:
2334 case GL_DEPTH_COMPONENT24:
2335 case GL_DEPTH_COMPONENT32:
2336 return GL_DEPTH_COMPONENT;
2337 case GL_DEPTH_STENCIL:
2338 case GL_DEPTH24_STENCIL8:
2339 return GL_DEPTH_STENCIL;
2340 default:
2341 ; /* fallthrough */
2342 }
2343 }
2344
2345 if (_mesa_has_ARB_texture_stencil8(ctx) ||
2346 _mesa_has_OES_texture_stencil8(ctx)) {
2347 switch (internalFormat) {
2348 case GL_STENCIL_INDEX:
2349 case GL_STENCIL_INDEX1:
2350 case GL_STENCIL_INDEX4:
2351 case GL_STENCIL_INDEX8:
2352 case GL_STENCIL_INDEX16:
2353 return GL_STENCIL_INDEX;
2354 default:
2355 ; /* fallthrough */
2356 }
2357 }
2358
2359 switch (internalFormat) {
2360 case GL_COMPRESSED_ALPHA:
2361 return GL_ALPHA;
2362 case GL_COMPRESSED_LUMINANCE:
2363 return GL_LUMINANCE;
2364 case GL_COMPRESSED_LUMINANCE_ALPHA:
2365 return GL_LUMINANCE_ALPHA;
2366 case GL_COMPRESSED_INTENSITY:
2367 return GL_INTENSITY;
2368 case GL_COMPRESSED_RGB:
2369 return GL_RGB;
2370 case GL_COMPRESSED_RGBA:
2371 return GL_RGBA;
2372 default:
2373 ; /* fallthrough */
2374 }
2375
2376 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2377 GLenum base_compressed =
2378 _mesa_gl_compressed_format_base_format(internalFormat);
2379 if (base_compressed)
2380 return base_compressed;
2381 }
2382
2383 if ((_mesa_has_KHR_texture_compression_astc_ldr(ctx) &&
2384 is_astc_2d_format(internalFormat)) ||
2385 (_mesa_has_OES_texture_compression_astc(ctx) &&
2386 is_astc_3d_format(internalFormat)))
2387 return GL_RGBA;
2388
2389 if (!_mesa_has_MESA_ycbcr_texture(ctx)) {
2390 if (internalFormat == GL_YCBCR_MESA)
2391 return GL_YCBCR_MESA;
2392 }
2393
2394 if (_mesa_has_half_float_textures(ctx)) {
2395 switch (internalFormat) {
2396 case GL_ALPHA16F_ARB:
2397 return GL_ALPHA;
2398 case GL_RGBA16F_ARB:
2399 return GL_RGBA;
2400 case GL_RGB16F_ARB:
2401 return GL_RGB;
2402 case GL_INTENSITY16F_ARB:
2403 return GL_INTENSITY;
2404 case GL_LUMINANCE16F_ARB:
2405 return GL_LUMINANCE;
2406 case GL_LUMINANCE_ALPHA16F_ARB:
2407 return GL_LUMINANCE_ALPHA;
2408 }
2409 }
2410
2411 if (_mesa_has_float_textures(ctx)) {
2412 switch (internalFormat) {
2413 case GL_ALPHA32F_ARB:
2414 return GL_ALPHA;
2415 case GL_RGBA32F_ARB:
2416 return GL_RGBA;
2417 case GL_RGB32F_ARB:
2418 return GL_RGB;
2419 case GL_INTENSITY32F_ARB:
2420 return GL_INTENSITY;
2421 case GL_LUMINANCE32F_ARB:
2422 return GL_LUMINANCE;
2423 case GL_LUMINANCE_ALPHA32F_ARB:
2424 return GL_LUMINANCE_ALPHA;
2425 }
2426 }
2427
2428 if (_mesa_has_EXT_texture_snorm(ctx) || _mesa_is_gles3(ctx)) {
2429 switch (internalFormat) {
2430 case GL_RED_SNORM:
2431 case GL_R8_SNORM:
2432 case GL_R16_SNORM:
2433 return GL_RED;
2434 case GL_RG_SNORM:
2435 case GL_RG8_SNORM:
2436 case GL_RG16_SNORM:
2437 return GL_RG;
2438 case GL_RGB_SNORM:
2439 case GL_RGB8_SNORM:
2440 case GL_RGB16_SNORM:
2441 return GL_RGB;
2442 case GL_RGBA_SNORM:
2443 case GL_RGBA8_SNORM:
2444 case GL_RGBA16_SNORM:
2445 return GL_RGBA;
2446 case GL_ALPHA_SNORM:
2447 case GL_ALPHA8_SNORM:
2448 case GL_ALPHA16_SNORM:
2449 return GL_ALPHA;
2450 case GL_LUMINANCE_SNORM:
2451 case GL_LUMINANCE8_SNORM:
2452 case GL_LUMINANCE16_SNORM:
2453 return GL_LUMINANCE;
2454 case GL_LUMINANCE_ALPHA_SNORM:
2455 case GL_LUMINANCE8_ALPHA8_SNORM:
2456 case GL_LUMINANCE16_ALPHA16_SNORM:
2457 return GL_LUMINANCE_ALPHA;
2458 case GL_INTENSITY_SNORM:
2459 case GL_INTENSITY8_SNORM:
2460 case GL_INTENSITY16_SNORM:
2461 return GL_INTENSITY;
2462 default:
2463 ; /* fallthrough */
2464 }
2465 }
2466
2467 if (_mesa_has_EXT_texture_sRGB(ctx) || _mesa_is_gles3(ctx)) {
2468 switch (internalFormat) {
2469 case GL_SRGB_EXT:
2470 case GL_SRGB8_EXT:
2471 case GL_COMPRESSED_SRGB_EXT:
2472 return GL_RGB;
2473 case GL_SRGB_ALPHA_EXT:
2474 case GL_SRGB8_ALPHA8_EXT:
2475 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2476 return GL_RGBA;
2477 case GL_SLUMINANCE_ALPHA_EXT:
2478 case GL_SLUMINANCE8_ALPHA8_EXT:
2479 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2480 return GL_LUMINANCE_ALPHA;
2481 case GL_SLUMINANCE_EXT:
2482 case GL_SLUMINANCE8_EXT:
2483 case GL_COMPRESSED_SLUMINANCE_EXT:
2484 return GL_LUMINANCE;
2485 default:
2486 ; /* fallthrough */
2487 }
2488 }
2489
2490 if (_mesa_has_EXT_texture_sRGB_R8(ctx)) {
2491 switch (internalFormat) {
2492 case GL_SR8_EXT:
2493 return GL_RED;
2494 default:
2495 ; /* fallthrough */
2496 }
2497 }
2498
2499 if (_mesa_has_integer_textures(ctx)) {
2500 switch (internalFormat) {
2501 case GL_RGBA8UI_EXT:
2502 case GL_RGBA16UI_EXT:
2503 case GL_RGBA32UI_EXT:
2504 case GL_RGBA8I_EXT:
2505 case GL_RGBA16I_EXT:
2506 case GL_RGBA32I_EXT:
2507 return GL_RGBA;
2508 case GL_RGB8UI_EXT:
2509 case GL_RGB16UI_EXT:
2510 case GL_RGB32UI_EXT:
2511 case GL_RGB8I_EXT:
2512 case GL_RGB16I_EXT:
2513 case GL_RGB32I_EXT:
2514 return GL_RGB;
2515 }
2516 }
2517
2518 if (_mesa_has_texture_rgb10_a2ui(ctx)) {
2519 switch (internalFormat) {
2520 case GL_RGB10_A2UI:
2521 return GL_RGBA;
2522 }
2523 }
2524
2525 if (_mesa_has_integer_textures(ctx)) {
2526 switch (internalFormat) {
2527 case GL_ALPHA8UI_EXT:
2528 case GL_ALPHA16UI_EXT:
2529 case GL_ALPHA32UI_EXT:
2530 case GL_ALPHA8I_EXT:
2531 case GL_ALPHA16I_EXT:
2532 case GL_ALPHA32I_EXT:
2533 return GL_ALPHA;
2534 case GL_INTENSITY8UI_EXT:
2535 case GL_INTENSITY16UI_EXT:
2536 case GL_INTENSITY32UI_EXT:
2537 case GL_INTENSITY8I_EXT:
2538 case GL_INTENSITY16I_EXT:
2539 case GL_INTENSITY32I_EXT:
2540 return GL_INTENSITY;
2541 case GL_LUMINANCE8UI_EXT:
2542 case GL_LUMINANCE16UI_EXT:
2543 case GL_LUMINANCE32UI_EXT:
2544 case GL_LUMINANCE8I_EXT:
2545 case GL_LUMINANCE16I_EXT:
2546 case GL_LUMINANCE32I_EXT:
2547 return GL_LUMINANCE;
2548 case GL_LUMINANCE_ALPHA8UI_EXT:
2549 case GL_LUMINANCE_ALPHA16UI_EXT:
2550 case GL_LUMINANCE_ALPHA32UI_EXT:
2551 case GL_LUMINANCE_ALPHA8I_EXT:
2552 case GL_LUMINANCE_ALPHA16I_EXT:
2553 case GL_LUMINANCE_ALPHA32I_EXT:
2554 return GL_LUMINANCE_ALPHA;
2555 default:
2556 ; /* fallthrough */
2557 }
2558 }
2559
2560 if (_mesa_has_rg_textures(ctx)) {
2561 switch (internalFormat) {
2562 case GL_R16F:
2563 if (!_mesa_has_half_float_textures(ctx))
2564 break;
2565 return GL_RED;
2566 case GL_R32F:
2567 if (!_mesa_has_float_textures(ctx))
2568 break;
2569 return GL_RED;
2570 case GL_R8I:
2571 case GL_R8UI:
2572 case GL_R16I:
2573 case GL_R16UI:
2574 case GL_R32I:
2575 case GL_R32UI:
2576 if (!_mesa_has_integer_textures(ctx))
2577 break;
2578 /* FALLTHROUGH */
2579 case GL_R8:
2580 case GL_R16:
2581 case GL_RED:
2582 case GL_COMPRESSED_RED:
2583 return GL_RED;
2584
2585 case GL_RG16F:
2586 if (!_mesa_has_half_float_textures(ctx))
2587 break;
2588 return GL_RG;
2589 case GL_RG32F:
2590 if (!_mesa_has_float_textures(ctx))
2591 break;
2592 return GL_RG;
2593 case GL_RG8I:
2594 case GL_RG8UI:
2595 case GL_RG16I:
2596 case GL_RG16UI:
2597 case GL_RG32I:
2598 case GL_RG32UI:
2599 if (!_mesa_has_integer_textures(ctx))
2600 break;
2601 /* FALLTHROUGH */
2602 case GL_RG:
2603 case GL_RG8:
2604 case GL_RG16:
2605 case GL_COMPRESSED_RG:
2606 return GL_RG;
2607 default:
2608 ; /* fallthrough */
2609 }
2610 }
2611
2612 if (_mesa_has_texture_shared_exponent(ctx)) {
2613 switch (internalFormat) {
2614 case GL_RGB9_E5_EXT:
2615 return GL_RGB;
2616 default:
2617 ; /* fallthrough */
2618 }
2619 }
2620
2621 if (_mesa_has_packed_float(ctx)) {
2622 switch (internalFormat) {
2623 case GL_R11F_G11F_B10F_EXT:
2624 return GL_RGB;
2625 default:
2626 ; /* fallthrough */
2627 }
2628 }
2629
2630 if (_mesa_has_float_depth_buffer(ctx)) {
2631 switch (internalFormat) {
2632 case GL_DEPTH_COMPONENT32F:
2633 return GL_DEPTH_COMPONENT;
2634 case GL_DEPTH32F_STENCIL8:
2635 return GL_DEPTH_STENCIL;
2636 default:
2637 ; /* fallthrough */
2638 }
2639 }
2640
2641 return -1; /* error */
2642 }
2643
2644 /**
2645 * Returns the effective internal format from a texture format and type.
2646 * This is used by texture image operations internally for validation, when
2647 * the specified internal format is a base (unsized) format.
2648 *
2649 * This method will only return a valid effective internal format if the
2650 * combination of format, type and internal format in base form, is acceptable.
2651 *
2652 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2653 * in extensions, to unambiguously correspond to the given base format, then
2654 * that internal format is returned as the effective. Otherwise, if the
2655 * combination is accepted but a single effective format is not defined, the
2656 * passed base format will be returned instead.
2657 *
2658 * \param format the texture format
2659 * \param type the texture type
2660 */
2661 static GLenum
2662 gles_effective_internal_format_for_format_and_type(GLenum format,
2663 GLenum type)
2664 {
2665 switch (type) {
2666 case GL_UNSIGNED_BYTE:
2667 switch (format) {
2668 case GL_RGBA:
2669 return GL_RGBA8;
2670 case GL_RGB:
2671 return GL_RGB8;
2672 case GL_RG:
2673 return GL_RG8;
2674 case GL_RED:
2675 return GL_R8;
2676 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2677 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2678 * internal formats, they do not correspond to GL constants, so the base
2679 * format is returned instead.
2680 */
2681 case GL_BGRA_EXT:
2682 case GL_LUMINANCE_ALPHA:
2683 case GL_LUMINANCE:
2684 case GL_ALPHA:
2685 return format;
2686 }
2687 break;
2688
2689 case GL_UNSIGNED_SHORT_4_4_4_4:
2690 if (format == GL_RGBA)
2691 return GL_RGBA4;
2692 break;
2693
2694 case GL_UNSIGNED_SHORT_5_5_5_1:
2695 if (format == GL_RGBA)
2696 return GL_RGB5_A1;
2697 break;
2698
2699 case GL_UNSIGNED_SHORT_5_6_5:
2700 if (format == GL_RGB)
2701 return GL_RGB565;
2702 break;
2703
2704 /* OES_packed_depth_stencil */
2705 case GL_UNSIGNED_INT_24_8:
2706 if (format == GL_DEPTH_STENCIL)
2707 return GL_DEPTH24_STENCIL8;
2708 break;
2709
2710 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2711 if (format == GL_DEPTH_STENCIL)
2712 return GL_DEPTH32F_STENCIL8;
2713 break;
2714
2715 case GL_UNSIGNED_SHORT:
2716 if (format == GL_DEPTH_COMPONENT)
2717 return GL_DEPTH_COMPONENT16;
2718 break;
2719
2720 case GL_UNSIGNED_INT:
2721 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2722 * the format.
2723 */
2724 if (format == GL_DEPTH_COMPONENT)
2725 return format;
2726 break;
2727
2728 /* OES_texture_float and OES_texture_half_float */
2729 case GL_FLOAT:
2730 if (format == GL_DEPTH_COMPONENT)
2731 return GL_DEPTH_COMPONENT32F;
2732 /* fall through */
2733 case GL_HALF_FLOAT_OES:
2734 switch (format) {
2735 case GL_RGBA:
2736 case GL_RGB:
2737 case GL_LUMINANCE_ALPHA:
2738 case GL_LUMINANCE:
2739 case GL_ALPHA:
2740 case GL_RED:
2741 case GL_RG:
2742 return format;
2743 }
2744 break;
2745 case GL_HALF_FLOAT:
2746 switch (format) {
2747 case GL_RG:
2748 case GL_RED:
2749 return format;
2750 }
2751 break;
2752
2753 /* GL_EXT_texture_type_2_10_10_10_REV */
2754 case GL_UNSIGNED_INT_2_10_10_10_REV:
2755 switch (format) {
2756 case GL_RGBA:
2757 case GL_RGB:
2758 return format;
2759 }
2760 break;
2761
2762 default:
2763 /* fall through and return NONE */
2764 break;
2765 }
2766
2767 return GL_NONE;
2768 }
2769
2770 /**
2771 * Do error checking of format/type combinations for OpenGL ES 3
2772 * glTex[Sub]Image, or ES1/ES2 with GL_OES_required_internalformat.
2773 * \return error code, or GL_NO_ERROR.
2774 */
2775 GLenum
2776 _mesa_gles_error_check_format_and_type(const struct gl_context *ctx,
2777 GLenum format, GLenum type,
2778 GLenum internalFormat)
2779 {
2780 /* If internalFormat is an unsized format, then the effective internal
2781 * format derived from format and type should be used instead. Page 127,
2782 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2783 *
2784 * "if internalformat is a base internal format, the effective
2785 * internal format is a sized internal format that is derived
2786 * from the format and type for internal use by the GL.
2787 * Table 3.12 specifies the mapping of format and type to effective
2788 * internal formats. The effective internal format is used by the GL
2789 * for purposes such as texture completeness or type checks for
2790 * CopyTex* commands. In these cases, the GL is required to operate
2791 * as if the effective internal format was used as the internalformat
2792 * when specifying the texture data."
2793 */
2794 if (_mesa_is_enum_format_unsized(internalFormat)) {
2795 GLenum effectiveInternalFormat =
2796 gles_effective_internal_format_for_format_and_type(format, type);
2797
2798 if (effectiveInternalFormat == GL_NONE)
2799 return GL_INVALID_OPERATION;
2800
2801 GLenum baseInternalFormat;
2802 if (internalFormat == GL_BGRA_EXT) {
2803 /* Unfortunately, _mesa_base_tex_format returns a base format of
2804 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2805 * asking the question, "what channels does this format have?"
2806 * However, if we're trying to determine if two internal formats
2807 * match in the ES3 sense, we actually want GL_BGRA.
2808 */
2809 baseInternalFormat = GL_BGRA_EXT;
2810 } else {
2811 baseInternalFormat =
2812 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2813 }
2814
2815 if (internalFormat != baseInternalFormat)
2816 return GL_INVALID_OPERATION;
2817
2818 internalFormat = effectiveInternalFormat;
2819 }
2820
2821 /* The GLES variant of EXT_texture_compression_s3tc is very vague and
2822 * doesn't list valid types. Just do exactly what the spec says.
2823 */
2824 if (_mesa_has_EXT_texture_compression_s3tc(ctx) &&
2825 (internalFormat == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||
2826 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ||
2827 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT3_EXT ||
2828 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT5_EXT))
2829 return format == GL_RGB || format == GL_RGBA ? GL_NO_ERROR :
2830 GL_INVALID_OPERATION;
2831
2832 switch (format) {
2833 case GL_BGRA_EXT:
2834 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2835 return GL_INVALID_OPERATION;
2836 break;
2837
2838 case GL_RGBA:
2839 switch (type) {
2840 case GL_UNSIGNED_BYTE:
2841 switch (internalFormat) {
2842 case GL_RGBA:
2843 case GL_RGBA8:
2844 case GL_RGB5_A1:
2845 case GL_RGBA4:
2846 break;
2847 case GL_SRGB8_ALPHA8_EXT:
2848 if (ctx->Version <= 20)
2849 return GL_INVALID_OPERATION;
2850 break;
2851 case GL_COMPRESSED_RGBA_BPTC_UNORM:
2852 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
2853 if (!_mesa_has_EXT_texture_compression_bptc(ctx))
2854 return GL_INVALID_OPERATION;
2855 break;
2856 default:
2857 return GL_INVALID_OPERATION;
2858 }
2859 break;
2860
2861 case GL_BYTE:
2862 if (ctx->Version <= 20 || internalFormat != GL_RGBA8_SNORM)
2863 return GL_INVALID_OPERATION;
2864 break;
2865
2866 case GL_UNSIGNED_SHORT:
2867 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGBA16)
2868 return GL_INVALID_OPERATION;
2869 break;
2870
2871 case GL_SHORT:
2872 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2873 internalFormat != GL_RGBA16_SNORM)
2874 return GL_INVALID_OPERATION;
2875 break;
2876
2877 case GL_UNSIGNED_SHORT_4_4_4_4:
2878 switch (internalFormat) {
2879 case GL_RGBA:
2880 case GL_RGBA4:
2881 break;
2882 default:
2883 return GL_INVALID_OPERATION;
2884 }
2885 break;
2886
2887 case GL_UNSIGNED_SHORT_5_5_5_1:
2888 switch (internalFormat) {
2889 case GL_RGBA:
2890 case GL_RGB5_A1:
2891 break;
2892 default:
2893 return GL_INVALID_OPERATION;
2894 }
2895 break;
2896
2897 case GL_UNSIGNED_INT_2_10_10_10_REV:
2898 switch (internalFormat) {
2899 case GL_RGBA:
2900 case GL_RGB10_A2:
2901 case GL_RGB5_A1:
2902 if (!_mesa_has_texture_type_2_10_10_10_REV(ctx))
2903 return GL_INVALID_OPERATION;
2904 break;
2905 default:
2906 return GL_INVALID_OPERATION;
2907 }
2908 break;
2909
2910 case GL_HALF_FLOAT:
2911 if (ctx->Version <= 20 || internalFormat != GL_RGBA16F)
2912 return GL_INVALID_OPERATION;
2913 break;
2914
2915 case GL_FLOAT:
2916 switch (internalFormat) {
2917 case GL_RGBA16F:
2918 case GL_RGBA32F:
2919 if (ctx->Version <= 20)
2920 return GL_INVALID_OPERATION;
2921 break;
2922 case GL_RGBA:
2923 if (_mesa_has_OES_texture_float(ctx) && internalFormat == format)
2924 break;
2925 default:
2926 return GL_INVALID_OPERATION;
2927 }
2928 break;
2929
2930 case GL_HALF_FLOAT_OES:
2931 if (_mesa_has_OES_texture_half_float(ctx) && internalFormat == format)
2932 break;
2933 default:
2934 return GL_INVALID_OPERATION;
2935 }
2936 break;
2937
2938 case GL_RGBA_INTEGER:
2939 if (ctx->Version <= 20)
2940 return GL_INVALID_OPERATION;
2941 switch (type) {
2942 case GL_UNSIGNED_BYTE:
2943 if (internalFormat != GL_RGBA8UI)
2944 return GL_INVALID_OPERATION;
2945 break;
2946
2947 case GL_BYTE:
2948 if (internalFormat != GL_RGBA8I)
2949 return GL_INVALID_OPERATION;
2950 break;
2951
2952 case GL_UNSIGNED_SHORT:
2953 if (internalFormat != GL_RGBA16UI)
2954 return GL_INVALID_OPERATION;
2955 break;
2956
2957 case GL_SHORT:
2958 if (internalFormat != GL_RGBA16I)
2959 return GL_INVALID_OPERATION;
2960 break;
2961
2962 case GL_UNSIGNED_INT:
2963 if (internalFormat != GL_RGBA32UI)
2964 return GL_INVALID_OPERATION;
2965 break;
2966
2967 case GL_INT:
2968 if (internalFormat != GL_RGBA32I)
2969 return GL_INVALID_OPERATION;
2970 break;
2971
2972 case GL_UNSIGNED_INT_2_10_10_10_REV:
2973 if (internalFormat != GL_RGB10_A2UI)
2974 return GL_INVALID_OPERATION;
2975 break;
2976
2977 default:
2978 return GL_INVALID_OPERATION;
2979 }
2980 break;
2981
2982 case GL_RGB:
2983 switch (type) {
2984 case GL_UNSIGNED_BYTE:
2985 switch (internalFormat) {
2986 case GL_RGB:
2987 case GL_RGB8:
2988 case GL_RGB565:
2989 break;
2990 case GL_SRGB8:
2991 if (ctx->Version <= 20)
2992 return GL_INVALID_OPERATION;
2993 break;
2994 default:
2995 return GL_INVALID_OPERATION;
2996 }
2997 break;
2998
2999 case GL_BYTE:
3000 if (ctx->Version <= 20 || internalFormat != GL_RGB8_SNORM)
3001 return GL_INVALID_OPERATION;
3002 break;
3003
3004 case GL_UNSIGNED_SHORT:
3005 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGB16)
3006 return GL_INVALID_OPERATION;
3007 break;
3008
3009 case GL_SHORT:
3010 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3011 internalFormat != GL_RGB16_SNORM)
3012 return GL_INVALID_OPERATION;
3013 break;
3014
3015 case GL_UNSIGNED_SHORT_5_6_5:
3016 switch (internalFormat) {
3017 case GL_RGB:
3018 case GL_RGB565:
3019 break;
3020 default:
3021 return GL_INVALID_OPERATION;
3022 }
3023 break;
3024
3025 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3026 if (ctx->Version <= 20 || internalFormat != GL_R11F_G11F_B10F)
3027 return GL_INVALID_OPERATION;
3028 break;
3029
3030 case GL_UNSIGNED_INT_5_9_9_9_REV:
3031 if (ctx->Version <= 20 || internalFormat != GL_RGB9_E5)
3032 return GL_INVALID_OPERATION;
3033 break;
3034
3035 case GL_HALF_FLOAT:
3036 if (ctx->Version <= 20)
3037 return GL_INVALID_OPERATION;
3038 switch (internalFormat) {
3039 case GL_RGB16F:
3040 case GL_R11F_G11F_B10F:
3041 case GL_RGB9_E5:
3042 break;
3043 default:
3044 return GL_INVALID_OPERATION;
3045 }
3046 break;
3047
3048 case GL_FLOAT:
3049 switch (internalFormat) {
3050 case GL_RGB16F:
3051 case GL_RGB32F:
3052 case GL_R11F_G11F_B10F:
3053 case GL_RGB9_E5:
3054 if (ctx->Version <= 20)
3055 return GL_INVALID_OPERATION;
3056 break;
3057 case GL_RGB:
3058 if (_mesa_has_OES_texture_float(ctx) && internalFormat == format)
3059 break;
3060 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
3061 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
3062 if (!_mesa_has_EXT_texture_compression_bptc(ctx))
3063 return GL_INVALID_OPERATION;
3064 break;
3065 default:
3066 return GL_INVALID_OPERATION;
3067 }
3068 break;
3069
3070 case GL_HALF_FLOAT_OES:
3071 if (!_mesa_has_OES_texture_half_float(ctx) || internalFormat != format)
3072 return GL_INVALID_OPERATION;
3073 break;
3074
3075 case GL_UNSIGNED_INT_2_10_10_10_REV:
3076 switch (internalFormat) {
3077 case GL_RGB:
3078 case GL_RGB10:
3079 case GL_RGB8:
3080 case GL_RGB565:
3081 /* GL_EXT_texture_type_2_10_10_10_REV allows GL_RGB even though
3082 * GLES3 doesn't, and GL_OES_required_internalformat extends that
3083 * to allow the sized RGB internalformats as well.
3084 */
3085 if (!_mesa_has_texture_type_2_10_10_10_REV(ctx))
3086 return GL_INVALID_OPERATION;
3087 break;
3088 default:
3089 return GL_INVALID_OPERATION;
3090 }
3091 break;
3092
3093 default:
3094 return GL_INVALID_OPERATION;
3095 }
3096 break;
3097
3098 case GL_RGB_INTEGER:
3099 if (ctx->Version <= 20)
3100 return GL_INVALID_OPERATION;
3101 switch (type) {
3102 case GL_UNSIGNED_BYTE:
3103 if (internalFormat != GL_RGB8UI)
3104 return GL_INVALID_OPERATION;
3105 break;
3106
3107 case GL_BYTE:
3108 if (internalFormat != GL_RGB8I)
3109 return GL_INVALID_OPERATION;
3110 break;
3111
3112 case GL_UNSIGNED_SHORT:
3113 if (internalFormat != GL_RGB16UI)
3114 return GL_INVALID_OPERATION;
3115 break;
3116
3117 case GL_SHORT:
3118 if (internalFormat != GL_RGB16I)
3119 return GL_INVALID_OPERATION;
3120 break;
3121
3122 case GL_UNSIGNED_INT:
3123 if (internalFormat != GL_RGB32UI)
3124 return GL_INVALID_OPERATION;
3125 break;
3126
3127 case GL_INT:
3128 if (internalFormat != GL_RGB32I)
3129 return GL_INVALID_OPERATION;
3130 break;
3131
3132 default:
3133 return GL_INVALID_OPERATION;
3134 }
3135 break;
3136
3137 case GL_RG:
3138 if (!_mesa_has_rg_textures(ctx))
3139 return GL_INVALID_OPERATION;
3140 switch (type) {
3141 case GL_UNSIGNED_BYTE:
3142 if (internalFormat != GL_RG8 &&
3143 (!_mesa_has_EXT_texture_compression_rgtc(ctx) ||
3144 internalFormat != GL_COMPRESSED_RED_GREEN_RGTC2_EXT))
3145 return GL_INVALID_OPERATION;
3146 break;
3147
3148 case GL_BYTE:
3149 if (internalFormat != GL_RG8_SNORM &&
3150 (!_mesa_has_EXT_texture_compression_rgtc(ctx) ||
3151 internalFormat != GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT))
3152 return GL_INVALID_OPERATION;
3153 break;
3154
3155 case GL_UNSIGNED_SHORT:
3156 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RG16)
3157 return GL_INVALID_OPERATION;
3158 break;
3159
3160 case GL_SHORT:
3161 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3162 internalFormat != GL_RG16_SNORM)
3163 return GL_INVALID_OPERATION;
3164 break;
3165
3166 case GL_HALF_FLOAT:
3167 case GL_HALF_FLOAT_OES:
3168 switch (internalFormat) {
3169 case GL_RG16F:
3170 if (ctx->Version <= 20)
3171 return GL_INVALID_OPERATION;
3172 break;
3173 case GL_RG:
3174 if (_mesa_has_rg_textures(ctx) &&
3175 _mesa_has_OES_texture_half_float(ctx))
3176 break;
3177 /* fallthrough */
3178 default:
3179 return GL_INVALID_OPERATION;
3180 }
3181 break;
3182
3183 case GL_FLOAT:
3184 switch (internalFormat) {
3185 case GL_RG16F:
3186 case GL_RG32F:
3187 break;
3188 case GL_RG:
3189 if (_mesa_has_rg_textures(ctx) &&
3190 _mesa_has_OES_texture_float(ctx))
3191 break;
3192 /* fallthrough */
3193 default:
3194 return GL_INVALID_OPERATION;
3195 }
3196 break;
3197
3198 default:
3199 return GL_INVALID_OPERATION;
3200 }
3201 break;
3202
3203 case GL_RG_INTEGER:
3204 if (ctx->Version <= 20)
3205 return GL_INVALID_OPERATION;
3206 switch (type) {
3207 case GL_UNSIGNED_BYTE:
3208 if (internalFormat != GL_RG8UI)
3209 return GL_INVALID_OPERATION;
3210 break;
3211
3212 case GL_BYTE:
3213 if (internalFormat != GL_RG8I)
3214 return GL_INVALID_OPERATION;
3215 break;
3216
3217 case GL_UNSIGNED_SHORT:
3218 if (internalFormat != GL_RG16UI)
3219 return GL_INVALID_OPERATION;
3220 break;
3221
3222 case GL_SHORT:
3223 if (internalFormat != GL_RG16I)
3224 return GL_INVALID_OPERATION;
3225 break;
3226
3227 case GL_UNSIGNED_INT:
3228 if (internalFormat != GL_RG32UI)
3229 return GL_INVALID_OPERATION;
3230 break;
3231
3232 case GL_INT:
3233 if (internalFormat != GL_RG32I)
3234 return GL_INVALID_OPERATION;
3235 break;
3236
3237 default:
3238 return GL_INVALID_OPERATION;
3239 }
3240 break;
3241
3242 case GL_RED:
3243 if (!_mesa_has_rg_textures(ctx))
3244 return GL_INVALID_OPERATION;
3245 switch (type) {
3246 case GL_UNSIGNED_BYTE:
3247 if (internalFormat == GL_R8 ||
3248 ((internalFormat == GL_SR8_EXT) &&
3249 _mesa_has_EXT_texture_sRGB_R8(ctx)) ||
3250 (internalFormat == GL_COMPRESSED_RED_RGTC1_EXT &&
3251 _mesa_has_EXT_texture_compression_rgtc(ctx)))
3252 break;
3253 return GL_INVALID_OPERATION;
3254
3255 case GL_BYTE:
3256 if (internalFormat != GL_R8_SNORM &&
3257 (!_mesa_has_EXT_texture_compression_rgtc(ctx) ||
3258 internalFormat != GL_COMPRESSED_SIGNED_RED_RGTC1_EXT))
3259 return GL_INVALID_OPERATION;
3260 break;
3261
3262 case GL_UNSIGNED_SHORT:
3263 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_R16)
3264 return GL_INVALID_OPERATION;
3265 break;
3266
3267 case GL_SHORT:
3268 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3269 internalFormat != GL_R16_SNORM)
3270 return GL_INVALID_OPERATION;
3271 break;
3272
3273 case GL_HALF_FLOAT:
3274 case GL_HALF_FLOAT_OES:
3275 switch (internalFormat) {
3276 case GL_R16F:
3277 if (ctx->Version <= 20)
3278 return GL_INVALID_OPERATION;
3279 break;
3280 case GL_RG:
3281 case GL_RED:
3282 if (_mesa_has_rg_textures(ctx) &&
3283 _mesa_has_OES_texture_half_float(ctx))
3284 break;
3285 /* fallthrough */
3286 default:
3287 return GL_INVALID_OPERATION;
3288 }
3289 break;
3290
3291 case GL_FLOAT:
3292 switch (internalFormat) {
3293 case GL_R16F:
3294 case GL_R32F:
3295 break;
3296 case GL_RED:
3297 if (_mesa_has_rg_textures(ctx) &&
3298 _mesa_has_OES_texture_float(ctx))
3299 break;
3300 /* fallthrough */
3301 default:
3302 return GL_INVALID_OPERATION;
3303 }
3304 break;
3305
3306 default:
3307 return GL_INVALID_OPERATION;
3308 }
3309 break;
3310
3311 case GL_RED_INTEGER:
3312 if (ctx->Version <= 20)
3313 return GL_INVALID_OPERATION;
3314 switch (type) {
3315 case GL_UNSIGNED_BYTE:
3316 if (internalFormat != GL_R8UI)
3317 return GL_INVALID_OPERATION;
3318 break;
3319
3320 case GL_BYTE:
3321 if (internalFormat != GL_R8I)
3322 return GL_INVALID_OPERATION;
3323 break;
3324
3325 case GL_UNSIGNED_SHORT:
3326 if (internalFormat != GL_R16UI)
3327 return GL_INVALID_OPERATION;
3328 break;
3329
3330 case GL_SHORT:
3331 if (internalFormat != GL_R16I)
3332 return GL_INVALID_OPERATION;
3333 break;
3334
3335 case GL_UNSIGNED_INT:
3336 if (internalFormat != GL_R32UI)
3337 return GL_INVALID_OPERATION;
3338 break;
3339
3340 case GL_INT:
3341 if (internalFormat != GL_R32I)
3342 return GL_INVALID_OPERATION;
3343 break;
3344
3345 default:
3346 return GL_INVALID_OPERATION;
3347 }
3348 break;
3349
3350 case GL_DEPTH_COMPONENT:
3351 switch (type) {
3352 case GL_UNSIGNED_SHORT:
3353 if (internalFormat != GL_DEPTH_COMPONENT
3354 && internalFormat != GL_DEPTH_COMPONENT16)
3355 return GL_INVALID_OPERATION;
3356 break;
3357
3358 case GL_UNSIGNED_INT:
3359 switch (internalFormat) {
3360 case GL_DEPTH_COMPONENT:
3361 case GL_DEPTH_COMPONENT16:
3362 case GL_DEPTH_COMPONENT24:
3363 break;
3364 default:
3365 return GL_INVALID_OPERATION;
3366 }
3367 break;
3368
3369 case GL_FLOAT:
3370 if (ctx->Version <= 20 || internalFormat != GL_DEPTH_COMPONENT32F)
3371 return GL_INVALID_OPERATION;
3372 break;
3373
3374 default:
3375 return GL_INVALID_OPERATION;
3376 }
3377 break;
3378
3379 case GL_DEPTH_STENCIL:
3380 switch (type) {
3381 case GL_UNSIGNED_INT_24_8:
3382 if (internalFormat != GL_DEPTH_STENCIL
3383 && internalFormat != GL_DEPTH24_STENCIL8)
3384 return GL_INVALID_OPERATION;
3385 break;
3386
3387 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3388 if (ctx->Version <= 20 || internalFormat != GL_DEPTH32F_STENCIL8)
3389 return GL_INVALID_OPERATION;
3390 break;
3391
3392 default:
3393 return GL_INVALID_OPERATION;
3394 }
3395 break;
3396
3397 case GL_STENCIL_INDEX:
3398 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3399 type != GL_UNSIGNED_BYTE ||
3400 internalFormat != GL_STENCIL_INDEX8) {
3401 return GL_INVALID_OPERATION;
3402 }
3403 break;
3404
3405 case GL_ALPHA:
3406 case GL_LUMINANCE:
3407 case GL_LUMINANCE_ALPHA:
3408 switch (type) {
3409 case GL_FLOAT:
3410 if (!_mesa_has_OES_texture_float(ctx) || internalFormat != format)
3411 return GL_INVALID_OPERATION;
3412 break;
3413 case GL_HALF_FLOAT_OES:
3414 if (!_mesa_has_OES_texture_half_float(ctx) || internalFormat != format)
3415 return GL_INVALID_OPERATION;
3416 break;
3417 case GL_UNSIGNED_BYTE:
3418 if (!(format == internalFormat ||
3419 (format == GL_ALPHA && internalFormat == GL_ALPHA8) ||
3420 (format == GL_LUMINANCE && internalFormat == GL_LUMINANCE8) ||
3421 (format == GL_LUMINANCE_ALPHA &&
3422 ((internalFormat == GL_LUMINANCE8_ALPHA8) ||
3423 (internalFormat == GL_LUMINANCE4_ALPHA4))))) {
3424 return GL_INVALID_OPERATION;
3425 }
3426 break;
3427 default:
3428 return GL_INVALID_OPERATION;
3429 }
3430 break;
3431 }
3432
3433 return GL_NO_ERROR;
3434 }
3435
3436 static void
3437 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3438 {
3439 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3440 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3441 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3442 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3443 }
3444
3445 static bool
3446 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3447 {
3448 switch (format) {
3449 case GL_RGBA:
3450 case GL_RGBA_INTEGER_EXT:
3451 set_swizzle(swizzle, 0, 1, 2, 3);
3452 return true;
3453 case GL_BGRA:
3454 case GL_BGRA_INTEGER_EXT:
3455 set_swizzle(swizzle, 2, 1, 0, 3);
3456 return true;
3457 case GL_ABGR_EXT:
3458 set_swizzle(swizzle, 3, 2, 1, 0);
3459 return true;
3460 case GL_RGB:
3461 case GL_RGB_INTEGER_EXT:
3462 set_swizzle(swizzle, 0, 1, 2, 5);
3463 return true;
3464 case GL_BGR:
3465 case GL_BGR_INTEGER_EXT:
3466 set_swizzle(swizzle, 2, 1, 0, 5);
3467 return true;
3468 case GL_LUMINANCE_ALPHA:
3469 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3470 set_swizzle(swizzle, 0, 0, 0, 1);
3471 return true;
3472 case GL_RG:
3473 case GL_RG_INTEGER:
3474 set_swizzle(swizzle, 0, 1, 4, 5);
3475 return true;
3476 case GL_RED:
3477 case GL_RED_INTEGER_EXT:
3478 set_swizzle(swizzle, 0, 4, 4, 5);
3479 return true;
3480 case GL_GREEN:
3481 case GL_GREEN_INTEGER_EXT:
3482 set_swizzle(swizzle, 4, 0, 4, 5);
3483 return true;
3484 case GL_BLUE:
3485 case GL_BLUE_INTEGER_EXT:
3486 set_swizzle(swizzle, 4, 4, 0, 5);
3487 return true;
3488 case GL_ALPHA:
3489 case GL_ALPHA_INTEGER_EXT:
3490 set_swizzle(swizzle, 4, 4, 4, 0);
3491 return true;
3492 case GL_LUMINANCE:
3493 case GL_LUMINANCE_INTEGER_EXT:
3494 set_swizzle(swizzle, 0, 0, 0, 5);
3495 return true;
3496 case GL_INTENSITY:
3497 set_swizzle(swizzle, 0, 0, 0, 0);
3498 return true;
3499 default:
3500 return false;
3501 }
3502 }
3503
3504 /**
3505 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3506 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3507 * otherwise (for non-array formats).
3508 *
3509 * This function will typically be used to compute a mesa format from a GL type
3510 * so we can then call _mesa_format_convert. This function does
3511 * not consider byte swapping, so it returns types assuming that no byte
3512 * swapping is involved. If byte swapping is involved then clients are supposed
3513 * to handle that on their side before calling _mesa_format_convert.
3514 *
3515 * This function returns an uint32_t that can pack a mesa_format or a
3516 * mesa_array_format. Clients must check the mesa array format bit
3517 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3518 * format is a mesa_array_format or a mesa_format.
3519 */
3520 uint32_t
3521 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3522 {
3523 bool is_array_format = true;
3524 uint8_t swizzle[4];
3525 bool normalized = false, is_float = false, is_signed = false;
3526 int num_channels = 0, type_size = 0;
3527
3528 /* Extract array format type information from the OpenGL data type */
3529 switch (type) {
3530 case GL_UNSIGNED_BYTE:
3531 type_size = 1;
3532 break;
3533 case GL_BYTE:
3534 type_size = 1;
3535 is_signed = true;
3536 break;
3537 case GL_UNSIGNED_SHORT:
3538 type_size = 2;
3539 break;
3540 case GL_SHORT:
3541 type_size = 2;
3542 is_signed = true;
3543 break;
3544 case GL_UNSIGNED_INT:
3545 type_size = 4;
3546 break;
3547 case GL_INT:
3548 type_size = 4;
3549 is_signed = true;
3550 break;
3551 case GL_HALF_FLOAT:
3552 case GL_HALF_FLOAT_OES:
3553 type_size = 2;
3554 is_signed = true;
3555 is_float = true;
3556 break;
3557 case GL_FLOAT:
3558 type_size = 4;
3559 is_signed = true;
3560 is_float = true;
3561 break;
3562 default:
3563 is_array_format = false;
3564 break;
3565 }
3566
3567 /* Extract array format swizzle information from the OpenGL format */
3568 if (is_array_format)
3569 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3570
3571 /* If this is an array format type after checking data type and format,
3572 * create the array format
3573 */
3574 if (is_array_format) {
3575 normalized = !_mesa_is_enum_format_integer(format);
3576 num_channels = _mesa_components_in_format(format);
3577
3578 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
3579 normalized, num_channels,
3580 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3581 }
3582
3583 /* Otherwise this is not an array format, so return the mesa_format
3584 * matching the OpenGL format and data type
3585 */
3586 switch (type) {
3587 case GL_UNSIGNED_SHORT_5_6_5:
3588 if (format == GL_RGB)
3589 return MESA_FORMAT_B5G6R5_UNORM;
3590 else if (format == GL_BGR)
3591 return MESA_FORMAT_R5G6B5_UNORM;
3592 else if (format == GL_RGB_INTEGER)
3593 return MESA_FORMAT_B5G6R5_UINT;
3594 break;
3595 case GL_UNSIGNED_SHORT_5_6_5_REV:
3596 if (format == GL_RGB)
3597 return MESA_FORMAT_R5G6B5_UNORM;
3598 else if (format == GL_BGR)
3599 return MESA_FORMAT_B5G6R5_UNORM;
3600 else if (format == GL_RGB_INTEGER)
3601 return MESA_FORMAT_R5G6B5_UINT;
3602 break;
3603 case GL_UNSIGNED_SHORT_4_4_4_4:
3604 if (format == GL_RGBA)
3605 return MESA_FORMAT_A4B4G4R4_UNORM;
3606 else if (format == GL_BGRA)
3607 return MESA_FORMAT_A4R4G4B4_UNORM;
3608 else if (format == GL_ABGR_EXT)
3609 return MESA_FORMAT_R4G4B4A4_UNORM;
3610 else if (format == GL_RGBA_INTEGER)
3611 return MESA_FORMAT_A4B4G4R4_UINT;
3612 else if (format == GL_BGRA_INTEGER)
3613 return MESA_FORMAT_A4R4G4B4_UINT;
3614 break;
3615 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3616 if (format == GL_RGBA)
3617 return MESA_FORMAT_R4G4B4A4_UNORM;
3618 else if (format == GL_BGRA)
3619 return MESA_FORMAT_B4G4R4A4_UNORM;
3620 else if (format == GL_ABGR_EXT)
3621 return MESA_FORMAT_A4B4G4R4_UNORM;
3622 else if (format == GL_RGBA_INTEGER)
3623 return MESA_FORMAT_R4G4B4A4_UINT;
3624 else if (format == GL_BGRA_INTEGER)
3625 return MESA_FORMAT_B4G4R4A4_UINT;
3626 break;
3627 case GL_UNSIGNED_SHORT_5_5_5_1:
3628 if (format == GL_RGBA)
3629 return MESA_FORMAT_A1B5G5R5_UNORM;
3630 else if (format == GL_BGRA)
3631 return MESA_FORMAT_A1R5G5B5_UNORM;
3632 else if (format == GL_RGBA_INTEGER)
3633 return MESA_FORMAT_A1B5G5R5_UINT;
3634 else if (format == GL_BGRA_INTEGER)
3635 return MESA_FORMAT_A1R5G5B5_UINT;
3636 break;
3637 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3638 if (format == GL_RGBA)
3639 return MESA_FORMAT_R5G5B5A1_UNORM;
3640 else if (format == GL_BGRA)
3641 return MESA_FORMAT_B5G5R5A1_UNORM;
3642 else if (format == GL_RGBA_INTEGER)
3643 return MESA_FORMAT_R5G5B5A1_UINT;
3644 else if (format == GL_BGRA_INTEGER)
3645 return MESA_FORMAT_B5G5R5A1_UINT;
3646 break;
3647 case GL_UNSIGNED_BYTE_3_3_2:
3648 if (format == GL_RGB)
3649 return MESA_FORMAT_B2G3R3_UNORM;
3650 else if (format == GL_RGB_INTEGER)
3651 return MESA_FORMAT_B2G3R3_UINT;
3652 break;
3653 case GL_UNSIGNED_BYTE_2_3_3_REV:
3654 if (format == GL_RGB)
3655 return MESA_FORMAT_R3G3B2_UNORM;
3656 else if (format == GL_RGB_INTEGER)
3657 return MESA_FORMAT_R3G3B2_UINT;
3658 break;
3659 case GL_UNSIGNED_INT_5_9_9_9_REV:
3660 if (format == GL_RGB)
3661 return MESA_FORMAT_R9G9B9E5_FLOAT;
3662 break;
3663 case GL_UNSIGNED_INT_10_10_10_2:
3664 if (format == GL_RGBA)
3665 return MESA_FORMAT_A2B10G10R10_UNORM;
3666 else if (format == GL_RGBA_INTEGER)
3667 return MESA_FORMAT_A2B10G10R10_UINT;
3668 else if (format == GL_BGRA)
3669 return MESA_FORMAT_A2R10G10B10_UNORM;
3670 else if (format == GL_BGRA_INTEGER)
3671 return MESA_FORMAT_A2R10G10B10_UINT;
3672 break;
3673 case GL_UNSIGNED_INT_2_10_10_10_REV:
3674 if (format == GL_RGB)
3675 return MESA_FORMAT_R10G10B10X2_UNORM;
3676 if (format == GL_RGBA)
3677 return MESA_FORMAT_R10G10B10A2_UNORM;
3678 else if (format == GL_RGBA_INTEGER)
3679 return MESA_FORMAT_R10G10B10A2_UINT;
3680 else if (format == GL_BGRA)
3681 return MESA_FORMAT_B10G10R10A2_UNORM;
3682 else if (format == GL_BGRA_INTEGER)
3683 return MESA_FORMAT_B10G10R10A2_UINT;
3684 break;
3685 case GL_UNSIGNED_INT_8_8_8_8:
3686 if (format == GL_RGBA)
3687 return MESA_FORMAT_A8B8G8R8_UNORM;
3688 else if (format == GL_BGRA)
3689 return MESA_FORMAT_A8R8G8B8_UNORM;
3690 else if (format == GL_ABGR_EXT)
3691 return MESA_FORMAT_R8G8B8A8_UNORM;
3692 else if (format == GL_RGBA_INTEGER)
3693 return MESA_FORMAT_A8B8G8R8_UINT;
3694 else if (format == GL_BGRA_INTEGER)
3695 return MESA_FORMAT_A8R8G8B8_UINT;
3696 break;
3697 case GL_UNSIGNED_INT_8_8_8_8_REV:
3698 if (format == GL_RGBA)
3699 return MESA_FORMAT_R8G8B8A8_UNORM;
3700 else if (format == GL_BGRA)
3701 return MESA_FORMAT_B8G8R8A8_UNORM;
3702 else if (format == GL_ABGR_EXT)
3703 return MESA_FORMAT_A8B8G8R8_UNORM;
3704 else if (format == GL_RGBA_INTEGER)
3705 return MESA_FORMAT_R8G8B8A8_UINT;
3706 else if (format == GL_BGRA_INTEGER)
3707 return MESA_FORMAT_B8G8R8A8_UINT;
3708 break;
3709 case GL_UNSIGNED_SHORT_8_8_MESA:
3710 if (format == GL_YCBCR_MESA)
3711 return MESA_FORMAT_YCBCR;
3712 break;
3713 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3714 if (format == GL_YCBCR_MESA)
3715 return MESA_FORMAT_YCBCR_REV;
3716 break;
3717 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3718 if (format == GL_RGB)
3719 return MESA_FORMAT_R11G11B10_FLOAT;
3720 break;
3721 case GL_FLOAT:
3722 if (format == GL_DEPTH_COMPONENT)
3723 return MESA_FORMAT_Z_FLOAT32;
3724 break;
3725 case GL_UNSIGNED_INT:
3726 if (format == GL_DEPTH_COMPONENT)
3727 return MESA_FORMAT_Z_UNORM32;
3728 break;
3729 case GL_UNSIGNED_SHORT:
3730 if (format == GL_DEPTH_COMPONENT)
3731 return MESA_FORMAT_Z_UNORM16;
3732 break;
3733 case GL_UNSIGNED_INT_24_8:
3734 if (format == GL_DEPTH_STENCIL)
3735 return MESA_FORMAT_Z24_UNORM_S8_UINT;
3736 break;
3737 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3738 if (format == GL_DEPTH_STENCIL)
3739 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3740 break;
3741 default:
3742 break;
3743 }
3744
3745 /* If we got here it means that we could not find a Mesa format that
3746 * matches the GL format/type provided. We may need to add a new Mesa
3747 * format in that case.
3748 */
3749 unreachable("Unsupported format");
3750 }
3751
3752 uint32_t
3753 _mesa_tex_format_from_format_and_type(const struct gl_context *ctx,
3754 GLenum gl_format, GLenum type)
3755 {
3756 mesa_format format = _mesa_format_from_format_and_type(gl_format, type);
3757
3758 if (_mesa_format_is_mesa_array_format(format))
3759 format = _mesa_format_from_array_format(format);
3760
3761 if (format == MESA_FORMAT_NONE || !ctx->TextureFormatSupported[format])
3762 return MESA_FORMAT_NONE;
3763
3764 return format;
3765 }
3766
3767 /**
3768 * Returns true if \p internal_format is a sized internal format that
3769 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
3770 */
3771 bool
3772 _mesa_is_es3_color_renderable(const struct gl_context *ctx,
3773 GLenum internal_format)
3774 {
3775 switch (internal_format) {
3776 case GL_R8:
3777 case GL_RG8:
3778 case GL_RGB8:
3779 case GL_RGB565:
3780 case GL_RGBA4:
3781 case GL_RGB5_A1:
3782 case GL_RGBA8:
3783 case GL_RGB10_A2:
3784 case GL_RGB10_A2UI:
3785 case GL_SRGB8_ALPHA8:
3786 case GL_R16F:
3787 case GL_RG16F:
3788 case GL_RGBA16F:
3789 case GL_R32F:
3790 case GL_RG32F:
3791 case GL_RGBA32F:
3792 case GL_R11F_G11F_B10F:
3793 case GL_R8I:
3794 case GL_R8UI:
3795 case GL_R16I:
3796 case GL_R16UI:
3797 case GL_R32I:
3798 case GL_R32UI:
3799 case GL_RG8I:
3800 case GL_RG8UI:
3801 case GL_RG16I:
3802 case GL_RG16UI:
3803 case GL_RG32I:
3804 case GL_RG32UI:
3805 case GL_RGBA8I:
3806 case GL_RGBA8UI:
3807 case GL_RGBA16I:
3808 case GL_RGBA16UI:
3809 case GL_RGBA32I:
3810 case GL_RGBA32UI:
3811 return true;
3812 case GL_R16:
3813 case GL_RG16:
3814 case GL_RGBA16:
3815 return _mesa_has_EXT_texture_norm16(ctx);
3816 case GL_R8_SNORM:
3817 case GL_RG8_SNORM:
3818 case GL_RGBA8_SNORM:
3819 return _mesa_has_EXT_render_snorm(ctx);
3820 case GL_R16_SNORM:
3821 case GL_RG16_SNORM:
3822 case GL_RGBA16_SNORM:
3823 return _mesa_has_EXT_texture_norm16(ctx) &&
3824 _mesa_has_EXT_render_snorm(ctx);
3825 default:
3826 return false;
3827 }
3828 }
3829
3830 /**
3831 * Returns true if \p internal_format is a sized internal format that
3832 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
3833 */
3834 bool
3835 _mesa_is_es3_texture_filterable(const struct gl_context *ctx,
3836 GLenum internal_format)
3837 {
3838 switch (internal_format) {
3839 case GL_R8:
3840 case GL_R8_SNORM:
3841 case GL_RG8:
3842 case GL_RG8_SNORM:
3843 case GL_RGB8:
3844 case GL_RGB8_SNORM:
3845 case GL_RGB565:
3846 case GL_RGBA4:
3847 case GL_RGB5_A1:
3848 case GL_RGBA8:
3849 case GL_RGBA8_SNORM:
3850 case GL_RGB10_A2:
3851 case GL_SRGB8:
3852 case GL_SRGB8_ALPHA8:
3853 case GL_R16F:
3854 case GL_RG16F:
3855 case GL_RGB16F:
3856 case GL_RGBA16F:
3857 case GL_R11F_G11F_B10F:
3858 case GL_RGB9_E5:
3859 return true;
3860 case GL_R16:
3861 case GL_R16_SNORM:
3862 case GL_RG16:
3863 case GL_RG16_SNORM:
3864 case GL_RGB16:
3865 case GL_RGB16_SNORM:
3866 case GL_RGBA16:
3867 case GL_RGBA16_SNORM:
3868 return _mesa_has_EXT_texture_norm16(ctx);
3869 case GL_R32F:
3870 case GL_RG32F:
3871 case GL_RGB32F:
3872 case GL_RGBA32F:
3873 /* The OES_texture_float_linear spec says:
3874 *
3875 * "When implemented against OpenGL ES 3.0 or later versions, sized
3876 * 32-bit floating-point formats become texture-filterable. This
3877 * should be noted by, for example, checking the ``TF'' column of
3878 * table 8.13 in the ES 3.1 Specification (``Correspondence of sized
3879 * internal formats to base internal formats ... and use cases ...'')
3880 * for the R32F, RG32F, RGB32F, and RGBA32F formats."
3881 */
3882 return _mesa_has_OES_texture_float_linear(ctx);
3883 default:
3884 return false;
3885 }
3886 }