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mesa/main: rename format-check function
[mesa.git] / src / mesa / main / glformats.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008-2009 VMware, Inc.
6 * Copyright (c) 2012 Intel Corporation
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28 #include "context.h"
29 #include "glformats.h"
30 #include "formats.h"
31 #include "texcompress.h"
32 #include "enums.h"
33
34 enum {
35 ZERO = 4,
36 ONE = 5
37 };
38
39 enum {
40 IDX_LUMINANCE = 0,
41 IDX_ALPHA,
42 IDX_INTENSITY,
43 IDX_LUMINANCE_ALPHA,
44 IDX_RGB,
45 IDX_RGBA,
46 IDX_RED,
47 IDX_GREEN,
48 IDX_BLUE,
49 IDX_BGR,
50 IDX_BGRA,
51 IDX_ABGR,
52 IDX_RG,
53 MAX_IDX
54 };
55
56 #define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
57 #define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
58 #define MAP3(x,y,z) MAP4(x, y, z, ZERO)
59 #define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
60
61 static const struct {
62 GLubyte format_idx;
63 GLubyte to_rgba[6];
64 GLubyte from_rgba[6];
65 } mappings[MAX_IDX] =
66 {
67 {
68 IDX_LUMINANCE,
69 MAP4(0,0,0,ONE),
70 MAP1(0)
71 },
72
73 {
74 IDX_ALPHA,
75 MAP4(ZERO, ZERO, ZERO, 0),
76 MAP1(3)
77 },
78
79 {
80 IDX_INTENSITY,
81 MAP4(0, 0, 0, 0),
82 MAP1(0),
83 },
84
85 {
86 IDX_LUMINANCE_ALPHA,
87 MAP4(0,0,0,1),
88 MAP2(0,3)
89 },
90
91 {
92 IDX_RGB,
93 MAP4(0,1,2,ONE),
94 MAP3(0,1,2)
95 },
96
97 {
98 IDX_RGBA,
99 MAP4(0,1,2,3),
100 MAP4(0,1,2,3),
101 },
102
103 {
104 IDX_RED,
105 MAP4(0, ZERO, ZERO, ONE),
106 MAP1(0),
107 },
108
109 {
110 IDX_GREEN,
111 MAP4(ZERO, 0, ZERO, ONE),
112 MAP1(1),
113 },
114
115 {
116 IDX_BLUE,
117 MAP4(ZERO, ZERO, 0, ONE),
118 MAP1(2),
119 },
120
121 {
122 IDX_BGR,
123 MAP4(2,1,0,ONE),
124 MAP3(2,1,0)
125 },
126
127 {
128 IDX_BGRA,
129 MAP4(2,1,0,3),
130 MAP4(2,1,0,3)
131 },
132
133 {
134 IDX_ABGR,
135 MAP4(3,2,1,0),
136 MAP4(3,2,1,0)
137 },
138
139 {
140 IDX_RG,
141 MAP4(0, 1, ZERO, ONE),
142 MAP2(0, 1)
143 },
144 };
145
146 /**
147 * Convert a GL image format enum to an IDX_* value (see above).
148 */
149 static int
150 get_map_idx(GLenum value)
151 {
152 switch (value) {
153 case GL_LUMINANCE:
154 case GL_LUMINANCE_INTEGER_EXT:
155 return IDX_LUMINANCE;
156 case GL_ALPHA:
157 case GL_ALPHA_INTEGER:
158 return IDX_ALPHA;
159 case GL_INTENSITY:
160 return IDX_INTENSITY;
161 case GL_LUMINANCE_ALPHA:
162 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
163 return IDX_LUMINANCE_ALPHA;
164 case GL_RGB:
165 case GL_RGB_INTEGER:
166 return IDX_RGB;
167 case GL_RGBA:
168 case GL_RGBA_INTEGER:
169 return IDX_RGBA;
170 case GL_RED:
171 case GL_RED_INTEGER:
172 return IDX_RED;
173 case GL_GREEN:
174 return IDX_GREEN;
175 case GL_BLUE:
176 return IDX_BLUE;
177 case GL_BGR:
178 case GL_BGR_INTEGER:
179 return IDX_BGR;
180 case GL_BGRA:
181 case GL_BGRA_INTEGER:
182 return IDX_BGRA;
183 case GL_ABGR_EXT:
184 return IDX_ABGR;
185 case GL_RG:
186 case GL_RG_INTEGER:
187 return IDX_RG;
188 default:
189 _mesa_problem(NULL, "Unexpected inFormat %s",
190 _mesa_enum_to_string(value));
191 return 0;
192 }
193 }
194
195 /**
196 * When promoting texture formats (see below) we need to compute the
197 * mapping of dest components back to source components.
198 * This function does that.
199 * \param inFormat the incoming format of the texture
200 * \param outFormat the final texture format
201 * \return map[6] a full 6-component map
202 */
203 void
204 _mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
205 {
206 const int inFmt = get_map_idx(inFormat);
207 const int outFmt = get_map_idx(outFormat);
208 const GLubyte *in2rgba = mappings[inFmt].to_rgba;
209 const GLubyte *rgba2out = mappings[outFmt].from_rgba;
210 int i;
211
212 for (i = 0; i < 4; i++)
213 map[i] = in2rgba[rgba2out[i]];
214
215 map[ZERO] = ZERO;
216 map[ONE] = ONE;
217
218 #if 0
219 printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
220 inFormat, _mesa_enum_to_string(inFormat),
221 outFormat, _mesa_enum_to_string(outFormat),
222 map[0],
223 map[1],
224 map[2],
225 map[3],
226 map[4],
227 map[5]);
228 #endif
229 }
230
231 /**
232 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
233 */
234 GLboolean
235 _mesa_type_is_packed(GLenum type)
236 {
237 switch (type) {
238 case GL_UNSIGNED_BYTE_3_3_2:
239 case GL_UNSIGNED_BYTE_2_3_3_REV:
240 case MESA_UNSIGNED_BYTE_4_4:
241 case GL_UNSIGNED_SHORT_5_6_5:
242 case GL_UNSIGNED_SHORT_5_6_5_REV:
243 case GL_UNSIGNED_SHORT_4_4_4_4:
244 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
245 case GL_UNSIGNED_SHORT_5_5_5_1:
246 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
247 case GL_UNSIGNED_INT_8_8_8_8:
248 case GL_UNSIGNED_INT_8_8_8_8_REV:
249 case GL_UNSIGNED_INT_10_10_10_2:
250 case GL_UNSIGNED_INT_2_10_10_10_REV:
251 case GL_UNSIGNED_SHORT_8_8_MESA:
252 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
253 case GL_UNSIGNED_INT_24_8_EXT:
254 case GL_UNSIGNED_INT_5_9_9_9_REV:
255 case GL_UNSIGNED_INT_10F_11F_11F_REV:
256 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
257 return GL_TRUE;
258 }
259
260 return GL_FALSE;
261 }
262
263
264 /**
265 * Get the size of a GL data type.
266 *
267 * \param type GL data type.
268 *
269 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
270 * if an invalid type enum.
271 */
272 GLint
273 _mesa_sizeof_type(GLenum type)
274 {
275 switch (type) {
276 case GL_BITMAP:
277 return 0;
278 case GL_UNSIGNED_BYTE:
279 return sizeof(GLubyte);
280 case GL_BYTE:
281 return sizeof(GLbyte);
282 case GL_UNSIGNED_SHORT:
283 return sizeof(GLushort);
284 case GL_SHORT:
285 return sizeof(GLshort);
286 case GL_UNSIGNED_INT:
287 return sizeof(GLuint);
288 case GL_INT:
289 return sizeof(GLint);
290 case GL_FLOAT:
291 return sizeof(GLfloat);
292 case GL_DOUBLE:
293 return sizeof(GLdouble);
294 case GL_HALF_FLOAT_ARB:
295 case GL_HALF_FLOAT_OES:
296 return sizeof(GLhalfARB);
297 case GL_FIXED:
298 return sizeof(GLfixed);
299 default:
300 return -1;
301 }
302 }
303
304
305 /**
306 * Same as _mesa_sizeof_type() but also accepting the packed pixel
307 * format data types.
308 */
309 GLint
310 _mesa_sizeof_packed_type(GLenum type)
311 {
312 switch (type) {
313 case GL_BITMAP:
314 return 0;
315 case GL_UNSIGNED_BYTE:
316 return sizeof(GLubyte);
317 case GL_BYTE:
318 return sizeof(GLbyte);
319 case GL_UNSIGNED_SHORT:
320 return sizeof(GLushort);
321 case GL_SHORT:
322 return sizeof(GLshort);
323 case GL_UNSIGNED_INT:
324 return sizeof(GLuint);
325 case GL_INT:
326 return sizeof(GLint);
327 case GL_HALF_FLOAT_ARB:
328 case GL_HALF_FLOAT_OES:
329 return sizeof(GLhalfARB);
330 case GL_FLOAT:
331 return sizeof(GLfloat);
332 case GL_UNSIGNED_BYTE_3_3_2:
333 case GL_UNSIGNED_BYTE_2_3_3_REV:
334 case MESA_UNSIGNED_BYTE_4_4:
335 return sizeof(GLubyte);
336 case GL_UNSIGNED_SHORT_5_6_5:
337 case GL_UNSIGNED_SHORT_5_6_5_REV:
338 case GL_UNSIGNED_SHORT_4_4_4_4:
339 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
340 case GL_UNSIGNED_SHORT_5_5_5_1:
341 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
342 case GL_UNSIGNED_SHORT_8_8_MESA:
343 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
344 return sizeof(GLushort);
345 case GL_UNSIGNED_INT_8_8_8_8:
346 case GL_UNSIGNED_INT_8_8_8_8_REV:
347 case GL_UNSIGNED_INT_10_10_10_2:
348 case GL_UNSIGNED_INT_2_10_10_10_REV:
349 case GL_UNSIGNED_INT_24_8_EXT:
350 case GL_UNSIGNED_INT_5_9_9_9_REV:
351 case GL_UNSIGNED_INT_10F_11F_11F_REV:
352 return sizeof(GLuint);
353 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
354 return 8;
355 default:
356 return -1;
357 }
358 }
359
360
361 /**
362 * Get the number of components in a pixel format.
363 *
364 * \param format pixel format.
365 *
366 * \return the number of components in the given format, or -1 if a bad format.
367 */
368 GLint
369 _mesa_components_in_format(GLenum format)
370 {
371 switch (format) {
372 case GL_COLOR_INDEX:
373 case GL_STENCIL_INDEX:
374 case GL_DEPTH_COMPONENT:
375 case GL_RED:
376 case GL_RED_INTEGER_EXT:
377 case GL_GREEN:
378 case GL_GREEN_INTEGER_EXT:
379 case GL_BLUE:
380 case GL_BLUE_INTEGER_EXT:
381 case GL_ALPHA:
382 case GL_ALPHA_INTEGER_EXT:
383 case GL_LUMINANCE:
384 case GL_LUMINANCE_INTEGER_EXT:
385 case GL_INTENSITY:
386 return 1;
387
388 case GL_LUMINANCE_ALPHA:
389 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
390 case GL_RG:
391 case GL_YCBCR_MESA:
392 case GL_DEPTH_STENCIL_EXT:
393 case GL_RG_INTEGER:
394 return 2;
395
396 case GL_RGB:
397 case GL_BGR:
398 case GL_RGB_INTEGER_EXT:
399 case GL_BGR_INTEGER_EXT:
400 return 3;
401
402 case GL_RGBA:
403 case GL_BGRA:
404 case GL_ABGR_EXT:
405 case GL_RGBA_INTEGER_EXT:
406 case GL_BGRA_INTEGER_EXT:
407 return 4;
408
409 default:
410 return -1;
411 }
412 }
413
414
415 /**
416 * Get the bytes per pixel of pixel format type pair.
417 *
418 * \param format pixel format.
419 * \param type pixel type.
420 *
421 * \return bytes per pixel, or -1 if a bad format or type was given.
422 */
423 GLint
424 _mesa_bytes_per_pixel(GLenum format, GLenum type)
425 {
426 GLint comps = _mesa_components_in_format(format);
427 if (comps < 0)
428 return -1;
429
430 switch (type) {
431 case GL_BITMAP:
432 return 0; /* special case */
433 case GL_BYTE:
434 case GL_UNSIGNED_BYTE:
435 return comps * sizeof(GLubyte);
436 case GL_SHORT:
437 case GL_UNSIGNED_SHORT:
438 return comps * sizeof(GLshort);
439 case GL_INT:
440 case GL_UNSIGNED_INT:
441 return comps * sizeof(GLint);
442 case GL_FLOAT:
443 return comps * sizeof(GLfloat);
444 case GL_HALF_FLOAT_ARB:
445 case GL_HALF_FLOAT_OES:
446 return comps * sizeof(GLhalfARB);
447 case GL_UNSIGNED_BYTE_3_3_2:
448 case GL_UNSIGNED_BYTE_2_3_3_REV:
449 if (format == GL_RGB || format == GL_BGR ||
450 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
451 return sizeof(GLubyte);
452 else
453 return -1; /* error */
454 case GL_UNSIGNED_SHORT_5_6_5:
455 case GL_UNSIGNED_SHORT_5_6_5_REV:
456 if (format == GL_RGB || format == GL_BGR ||
457 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
458 return sizeof(GLushort);
459 else
460 return -1; /* error */
461 case GL_UNSIGNED_SHORT_4_4_4_4:
462 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
463 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
464 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
465 return sizeof(GLushort);
466 else
467 return -1;
468 case GL_UNSIGNED_SHORT_5_5_5_1:
469 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
470 if (format == GL_RGBA || format == GL_BGRA ||
471 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
472 return sizeof(GLushort);
473 else
474 return -1;
475 case GL_UNSIGNED_INT_8_8_8_8:
476 case GL_UNSIGNED_INT_8_8_8_8_REV:
477 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
478 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
479 format == GL_RGB)
480 return sizeof(GLuint);
481 else
482 return -1;
483 case GL_UNSIGNED_INT_10_10_10_2:
484 case GL_UNSIGNED_INT_2_10_10_10_REV:
485 if (format == GL_RGBA || format == GL_BGRA ||
486 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
487 format == GL_RGB)
488 return sizeof(GLuint);
489 else
490 return -1;
491 case GL_UNSIGNED_SHORT_8_8_MESA:
492 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
493 if (format == GL_YCBCR_MESA)
494 return sizeof(GLushort);
495 else
496 return -1;
497 case GL_UNSIGNED_INT_24_8_EXT:
498 if (format == GL_DEPTH_COMPONENT ||
499 format == GL_DEPTH_STENCIL_EXT)
500 return sizeof(GLuint);
501 else
502 return -1;
503 case GL_UNSIGNED_INT_5_9_9_9_REV:
504 if (format == GL_RGB)
505 return sizeof(GLuint);
506 else
507 return -1;
508 case GL_UNSIGNED_INT_10F_11F_11F_REV:
509 if (format == GL_RGB)
510 return sizeof(GLuint);
511 else
512 return -1;
513 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
514 if (format == GL_DEPTH_STENCIL)
515 return 8;
516 else
517 return -1;
518 default:
519 return -1;
520 }
521 }
522
523
524 /**
525 * Get the number of bytes for a vertex attrib with the given number of
526 * components and type.
527 *
528 * \param comps number of components.
529 * \param type data type.
530 *
531 * \return bytes per attribute, or -1 if a bad comps/type combination was given.
532 */
533 GLint
534 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
535 {
536 switch (type) {
537 case GL_BYTE:
538 case GL_UNSIGNED_BYTE:
539 return comps * sizeof(GLubyte);
540 case GL_SHORT:
541 case GL_UNSIGNED_SHORT:
542 return comps * sizeof(GLshort);
543 case GL_INT:
544 case GL_UNSIGNED_INT:
545 return comps * sizeof(GLint);
546 case GL_FLOAT:
547 return comps * sizeof(GLfloat);
548 case GL_HALF_FLOAT_ARB:
549 case GL_HALF_FLOAT_OES:
550 return comps * sizeof(GLhalfARB);
551 case GL_DOUBLE:
552 return comps * sizeof(GLdouble);
553 case GL_FIXED:
554 return comps * sizeof(GLfixed);
555 case GL_INT_2_10_10_10_REV:
556 case GL_UNSIGNED_INT_2_10_10_10_REV:
557 if (comps == 4)
558 return sizeof(GLuint);
559 else
560 return -1;
561 case GL_UNSIGNED_INT_10F_11F_11F_REV:
562 if (comps == 3)
563 return sizeof(GLuint);
564 else
565 return -1;
566 case GL_UNSIGNED_INT64_ARB:
567 return comps * 8;
568 default:
569 return -1;
570 }
571 }
572
573 /**
574 * Test if the given format is unsized.
575 */
576 GLboolean
577 _mesa_is_enum_format_unsized(GLenum format)
578 {
579 switch (format) {
580 case GL_RGBA:
581 case GL_BGRA:
582 case GL_ABGR_EXT:
583 case GL_RGB:
584 case GL_BGR:
585 case GL_RG:
586 case GL_RED:
587 case GL_GREEN:
588 case GL_BLUE:
589 case GL_ALPHA:
590 case GL_INTENSITY:
591 case GL_LUMINANCE:
592 case GL_LUMINANCE_ALPHA:
593
594 case GL_SRGB:
595 case GL_SRGB_ALPHA:
596 case GL_SLUMINANCE:
597 case GL_SLUMINANCE_ALPHA:
598
599 case GL_RGBA_SNORM:
600 case GL_RGB_SNORM:
601 case GL_RG_SNORM:
602 case GL_RED_SNORM:
603 case GL_ALPHA_SNORM:
604 case GL_INTENSITY_SNORM:
605 case GL_LUMINANCE_SNORM:
606 case GL_LUMINANCE_ALPHA_SNORM:
607
608 case GL_RED_INTEGER:
609 case GL_GREEN_INTEGER:
610 case GL_BLUE_INTEGER:
611 case GL_ALPHA_INTEGER:
612 case GL_RGB_INTEGER:
613 case GL_RGBA_INTEGER:
614 case GL_BGR_INTEGER:
615 case GL_BGRA_INTEGER:
616 case GL_RG_INTEGER:
617 case GL_LUMINANCE_INTEGER_EXT:
618 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
619
620 case GL_DEPTH_COMPONENT:
621 case GL_DEPTH_STENCIL:
622 case GL_STENCIL_INDEX:
623 return GL_TRUE;
624 default:
625 return GL_FALSE;
626 }
627 }
628
629 /**
630 * Test if the given format is a UNORM (unsigned-normalized) format.
631 */
632 GLboolean
633 _mesa_is_enum_format_unorm(GLenum format)
634 {
635 switch(format) {
636 case GL_RED:
637 case GL_GREEN:
638 case GL_BLUE:
639 case GL_ALPHA:
640 case GL_ALPHA4:
641 case GL_ALPHA8:
642 case GL_ALPHA12:
643 case GL_ALPHA16:
644 case 1:
645 case GL_LUMINANCE:
646 case GL_SLUMINANCE:
647 case GL_LUMINANCE4:
648 case GL_LUMINANCE8:
649 case GL_LUMINANCE12:
650 case GL_LUMINANCE16:
651 case 2:
652 case GL_LUMINANCE_ALPHA:
653 case GL_SLUMINANCE_ALPHA:
654 case GL_LUMINANCE4_ALPHA4:
655 case GL_LUMINANCE6_ALPHA2:
656 case GL_LUMINANCE8_ALPHA8:
657 case GL_LUMINANCE12_ALPHA4:
658 case GL_LUMINANCE12_ALPHA12:
659 case GL_LUMINANCE16_ALPHA16:
660 case GL_INTENSITY:
661 case GL_INTENSITY4:
662 case GL_INTENSITY8:
663 case GL_INTENSITY12:
664 case GL_INTENSITY16:
665 case GL_R8:
666 case GL_R16:
667 case GL_RG:
668 case GL_RG8:
669 case GL_RG16:
670 case 3:
671 case GL_RGB:
672 case GL_BGR:
673 case GL_SRGB:
674 case GL_R3_G3_B2:
675 case GL_RGB4:
676 case GL_RGB5:
677 case GL_RGB565:
678 case GL_RGB8:
679 case GL_RGB10:
680 case GL_RGB12:
681 case GL_RGB16:
682 case 4:
683 case GL_ABGR_EXT:
684 case GL_RGBA:
685 case GL_BGRA:
686 case GL_SRGB_ALPHA:
687 case GL_RGBA2:
688 case GL_RGBA4:
689 case GL_RGB5_A1:
690 case GL_RGBA8:
691 case GL_RGB10_A2:
692 case GL_RGBA12:
693 case GL_RGBA16:
694 return GL_TRUE;
695 default:
696 return GL_FALSE;
697 }
698 }
699
700 /**
701 * Test if the given format is a SNORM (signed-normalized) format.
702 */
703 GLboolean
704 _mesa_is_enum_format_snorm(GLenum format)
705 {
706 switch (format) {
707 /* signed, normalized texture formats */
708 case GL_RED_SNORM:
709 case GL_R8_SNORM:
710 case GL_R16_SNORM:
711 case GL_RG_SNORM:
712 case GL_RG8_SNORM:
713 case GL_RG16_SNORM:
714 case GL_RGB_SNORM:
715 case GL_RGB8_SNORM:
716 case GL_RGB16_SNORM:
717 case GL_RGBA_SNORM:
718 case GL_RGBA8_SNORM:
719 case GL_RGBA16_SNORM:
720 case GL_ALPHA_SNORM:
721 case GL_ALPHA8_SNORM:
722 case GL_ALPHA16_SNORM:
723 case GL_LUMINANCE_SNORM:
724 case GL_LUMINANCE8_SNORM:
725 case GL_LUMINANCE16_SNORM:
726 case GL_LUMINANCE_ALPHA_SNORM:
727 case GL_LUMINANCE8_ALPHA8_SNORM:
728 case GL_LUMINANCE16_ALPHA16_SNORM:
729 case GL_INTENSITY_SNORM:
730 case GL_INTENSITY8_SNORM:
731 case GL_INTENSITY16_SNORM:
732 return GL_TRUE;
733 default:
734 return GL_FALSE;
735 }
736 }
737
738 /**
739 * Test if the given format is an integer (non-normalized) format.
740 */
741 GLboolean
742 _mesa_is_enum_format_unsigned_int(GLenum format)
743 {
744 switch (format) {
745 /* specific integer formats */
746 case GL_RGBA32UI_EXT:
747 case GL_RGB32UI_EXT:
748 case GL_RG32UI:
749 case GL_R32UI:
750 case GL_ALPHA32UI_EXT:
751 case GL_INTENSITY32UI_EXT:
752 case GL_LUMINANCE32UI_EXT:
753 case GL_LUMINANCE_ALPHA32UI_EXT:
754 case GL_RGBA16UI_EXT:
755 case GL_RGB16UI_EXT:
756 case GL_RG16UI:
757 case GL_R16UI:
758 case GL_ALPHA16UI_EXT:
759 case GL_INTENSITY16UI_EXT:
760 case GL_LUMINANCE16UI_EXT:
761 case GL_LUMINANCE_ALPHA16UI_EXT:
762 case GL_RGBA8UI_EXT:
763 case GL_RGB8UI_EXT:
764 case GL_RG8UI:
765 case GL_R8UI:
766 case GL_ALPHA8UI_EXT:
767 case GL_INTENSITY8UI_EXT:
768 case GL_LUMINANCE8UI_EXT:
769 case GL_LUMINANCE_ALPHA8UI_EXT:
770 case GL_RGB10_A2UI:
771 return GL_TRUE;
772 default:
773 return GL_FALSE;
774 }
775 }
776
777
778 /**
779 * Test if the given format is an integer (non-normalized) format.
780 */
781 GLboolean
782 _mesa_is_enum_format_signed_int(GLenum format)
783 {
784 switch (format) {
785 /* generic integer formats */
786 case GL_RED_INTEGER_EXT:
787 case GL_GREEN_INTEGER_EXT:
788 case GL_BLUE_INTEGER_EXT:
789 case GL_ALPHA_INTEGER_EXT:
790 case GL_RGB_INTEGER_EXT:
791 case GL_RGBA_INTEGER_EXT:
792 case GL_BGR_INTEGER_EXT:
793 case GL_BGRA_INTEGER_EXT:
794 case GL_LUMINANCE_INTEGER_EXT:
795 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
796 case GL_RG_INTEGER:
797 /* specific integer formats */
798 case GL_RGBA32I_EXT:
799 case GL_RGB32I_EXT:
800 case GL_RG32I:
801 case GL_R32I:
802 case GL_ALPHA32I_EXT:
803 case GL_INTENSITY32I_EXT:
804 case GL_LUMINANCE32I_EXT:
805 case GL_LUMINANCE_ALPHA32I_EXT:
806 case GL_RGBA16I_EXT:
807 case GL_RGB16I_EXT:
808 case GL_RG16I:
809 case GL_R16I:
810 case GL_ALPHA16I_EXT:
811 case GL_INTENSITY16I_EXT:
812 case GL_LUMINANCE16I_EXT:
813 case GL_LUMINANCE_ALPHA16I_EXT:
814 case GL_RGBA8I_EXT:
815 case GL_RGB8I_EXT:
816 case GL_RG8I:
817 case GL_R8I:
818 case GL_ALPHA8I_EXT:
819 case GL_INTENSITY8I_EXT:
820 case GL_LUMINANCE8I_EXT:
821 case GL_LUMINANCE_ALPHA8I_EXT:
822 return GL_TRUE;
823 default:
824 return GL_FALSE;
825 }
826 }
827
828 /**
829 * Test if the given format is an ASTC 2D format.
830 */
831 static bool
832 is_astc_2d_format(GLenum internalFormat)
833 {
834 switch (internalFormat) {
835 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
844 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
845 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
846 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
847 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
848 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
858 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
859 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
860 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
861 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
862 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
863 return true;
864 default:
865 return false;
866 }
867 }
868
869 /**
870 * Test if the given format is an ASTC 3D format.
871 */
872 static bool
873 is_astc_3d_format(GLenum internalFormat)
874 {
875 switch (internalFormat) {
876 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
877 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
878 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
879 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
880 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
881 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
882 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
883 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
884 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
885 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
886 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
887 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
888 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
889 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
890 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
891 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
892 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
893 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
894 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
895 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
896 return true;
897 default:
898 return false;
899 }
900 }
901
902 /**
903 * Test if the given format is an ASTC format.
904 */
905 GLboolean
906 _mesa_is_astc_format(GLenum internalFormat)
907 {
908 return is_astc_2d_format(internalFormat) ||
909 is_astc_3d_format(internalFormat);
910 }
911
912 /**
913 * Test if the given format is an ETC2 format.
914 */
915 GLboolean
916 _mesa_is_etc2_format(GLenum internalFormat)
917 {
918 switch (internalFormat) {
919 case GL_COMPRESSED_RGB8_ETC2:
920 case GL_COMPRESSED_SRGB8_ETC2:
921 case GL_COMPRESSED_RGBA8_ETC2_EAC:
922 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
923 case GL_COMPRESSED_R11_EAC:
924 case GL_COMPRESSED_RG11_EAC:
925 case GL_COMPRESSED_SIGNED_R11_EAC:
926 case GL_COMPRESSED_SIGNED_RG11_EAC:
927 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
928 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
929 return true;
930 default:
931 return false;
932 }
933 }
934
935 /**
936 * Test if the given format is an integer (non-normalized) format.
937 */
938 GLboolean
939 _mesa_is_enum_format_integer(GLenum format)
940 {
941 return _mesa_is_enum_format_unsigned_int(format) ||
942 _mesa_is_enum_format_signed_int(format);
943 }
944
945
946 GLboolean
947 _mesa_is_type_unsigned(GLenum type)
948 {
949 switch (type) {
950 case GL_UNSIGNED_INT:
951 case GL_UNSIGNED_INT_8_8_8_8:
952 case GL_UNSIGNED_INT_8_8_8_8_REV:
953 case GL_UNSIGNED_INT_10_10_10_2:
954 case GL_UNSIGNED_INT_2_10_10_10_REV:
955
956 case GL_UNSIGNED_SHORT:
957 case GL_UNSIGNED_SHORT_4_4_4_4:
958 case GL_UNSIGNED_SHORT_5_5_5_1:
959 case GL_UNSIGNED_SHORT_5_6_5:
960 case GL_UNSIGNED_SHORT_5_6_5_REV:
961 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
962 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
963 case GL_UNSIGNED_SHORT_8_8_MESA:
964 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
965
966 case GL_UNSIGNED_BYTE:
967 case GL_UNSIGNED_BYTE_3_3_2:
968 case GL_UNSIGNED_BYTE_2_3_3_REV:
969 return GL_TRUE;
970
971 default:
972 return GL_FALSE;
973 }
974 }
975
976
977 /**
978 * Test if the given image format is a color/RGBA format (i.e., not color
979 * index, depth, stencil, etc).
980 * \param format the image format value (may by an internal texture format)
981 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
982 */
983 GLboolean
984 _mesa_is_color_format(GLenum format)
985 {
986 switch (format) {
987 case GL_RED:
988 case GL_GREEN:
989 case GL_BLUE:
990 case GL_ALPHA:
991 case GL_ALPHA4:
992 case GL_ALPHA8:
993 case GL_ALPHA12:
994 case GL_ALPHA16:
995 case 1:
996 case GL_LUMINANCE:
997 case GL_LUMINANCE4:
998 case GL_LUMINANCE8:
999 case GL_LUMINANCE12:
1000 case GL_LUMINANCE16:
1001 case 2:
1002 case GL_LUMINANCE_ALPHA:
1003 case GL_LUMINANCE4_ALPHA4:
1004 case GL_LUMINANCE6_ALPHA2:
1005 case GL_LUMINANCE8_ALPHA8:
1006 case GL_LUMINANCE12_ALPHA4:
1007 case GL_LUMINANCE12_ALPHA12:
1008 case GL_LUMINANCE16_ALPHA16:
1009 case GL_INTENSITY:
1010 case GL_INTENSITY4:
1011 case GL_INTENSITY8:
1012 case GL_INTENSITY12:
1013 case GL_INTENSITY16:
1014 case GL_R8:
1015 case GL_R16:
1016 case GL_RG:
1017 case GL_RG8:
1018 case GL_RG16:
1019 case 3:
1020 case GL_RGB:
1021 case GL_BGR:
1022 case GL_R3_G3_B2:
1023 case GL_RGB4:
1024 case GL_RGB5:
1025 case GL_RGB565:
1026 case GL_RGB8:
1027 case GL_RGB10:
1028 case GL_RGB12:
1029 case GL_RGB16:
1030 case 4:
1031 case GL_ABGR_EXT:
1032 case GL_RGBA:
1033 case GL_BGRA:
1034 case GL_RGBA2:
1035 case GL_RGBA4:
1036 case GL_RGB5_A1:
1037 case GL_RGBA8:
1038 case GL_RGB10_A2:
1039 case GL_RGBA12:
1040 case GL_RGBA16:
1041 /* float texture formats */
1042 case GL_ALPHA16F_ARB:
1043 case GL_ALPHA32F_ARB:
1044 case GL_LUMINANCE16F_ARB:
1045 case GL_LUMINANCE32F_ARB:
1046 case GL_LUMINANCE_ALPHA16F_ARB:
1047 case GL_LUMINANCE_ALPHA32F_ARB:
1048 case GL_INTENSITY16F_ARB:
1049 case GL_INTENSITY32F_ARB:
1050 case GL_R16F:
1051 case GL_R32F:
1052 case GL_RG16F:
1053 case GL_RG32F:
1054 case GL_RGB16F_ARB:
1055 case GL_RGB32F_ARB:
1056 case GL_RGBA16F_ARB:
1057 case GL_RGBA32F_ARB:
1058 /* compressed formats */
1059 case GL_COMPRESSED_ALPHA:
1060 case GL_COMPRESSED_LUMINANCE:
1061 case GL_COMPRESSED_LUMINANCE_ALPHA:
1062 case GL_COMPRESSED_INTENSITY:
1063 case GL_COMPRESSED_RED:
1064 case GL_COMPRESSED_RG:
1065 case GL_COMPRESSED_RGB:
1066 case GL_COMPRESSED_RGBA:
1067 case GL_RGB_S3TC:
1068 case GL_RGB4_S3TC:
1069 case GL_RGBA_S3TC:
1070 case GL_RGBA4_S3TC:
1071 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1072 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1073 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1074 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1075 case GL_COMPRESSED_RGB_FXT1_3DFX:
1076 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1077 case GL_SRGB_EXT:
1078 case GL_SRGB8_EXT:
1079 case GL_SRGB_ALPHA_EXT:
1080 case GL_SRGB8_ALPHA8_EXT:
1081 case GL_SLUMINANCE_ALPHA_EXT:
1082 case GL_SLUMINANCE8_ALPHA8_EXT:
1083 case GL_SLUMINANCE_EXT:
1084 case GL_SLUMINANCE8_EXT:
1085 case GL_COMPRESSED_SRGB_EXT:
1086 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1087 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1088 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1089 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1090 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1091 case GL_COMPRESSED_SLUMINANCE_EXT:
1092 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1093 case GL_COMPRESSED_RED_RGTC1:
1094 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1095 case GL_COMPRESSED_RG_RGTC2:
1096 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1097 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1098 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1099 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1100 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1101 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1102 case GL_ETC1_RGB8_OES:
1103 case GL_COMPRESSED_RGB8_ETC2:
1104 case GL_COMPRESSED_SRGB8_ETC2:
1105 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1106 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1107 case GL_COMPRESSED_R11_EAC:
1108 case GL_COMPRESSED_RG11_EAC:
1109 case GL_COMPRESSED_SIGNED_R11_EAC:
1110 case GL_COMPRESSED_SIGNED_RG11_EAC:
1111 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1112 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1113 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1114 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1115 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1116 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1117 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1118 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1119 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1120 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1121 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1122 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1123 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1124 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1125 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1126 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1127 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1128 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1129 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1130 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1131 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1132 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1133 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1134 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1135 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1136 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1137 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1138 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1139 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1140 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1141 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1142 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1143 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1144 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1145 /* generic integer formats */
1146 case GL_RED_INTEGER_EXT:
1147 case GL_GREEN_INTEGER_EXT:
1148 case GL_BLUE_INTEGER_EXT:
1149 case GL_ALPHA_INTEGER_EXT:
1150 case GL_RGB_INTEGER_EXT:
1151 case GL_RGBA_INTEGER_EXT:
1152 case GL_BGR_INTEGER_EXT:
1153 case GL_BGRA_INTEGER_EXT:
1154 case GL_RG_INTEGER:
1155 case GL_LUMINANCE_INTEGER_EXT:
1156 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1157 /* sized integer formats */
1158 case GL_RGBA32UI_EXT:
1159 case GL_RGB32UI_EXT:
1160 case GL_RG32UI:
1161 case GL_R32UI:
1162 case GL_ALPHA32UI_EXT:
1163 case GL_INTENSITY32UI_EXT:
1164 case GL_LUMINANCE32UI_EXT:
1165 case GL_LUMINANCE_ALPHA32UI_EXT:
1166 case GL_RGBA16UI_EXT:
1167 case GL_RGB16UI_EXT:
1168 case GL_RG16UI:
1169 case GL_R16UI:
1170 case GL_ALPHA16UI_EXT:
1171 case GL_INTENSITY16UI_EXT:
1172 case GL_LUMINANCE16UI_EXT:
1173 case GL_LUMINANCE_ALPHA16UI_EXT:
1174 case GL_RGBA8UI_EXT:
1175 case GL_RGB8UI_EXT:
1176 case GL_RG8UI:
1177 case GL_R8UI:
1178 case GL_ALPHA8UI_EXT:
1179 case GL_INTENSITY8UI_EXT:
1180 case GL_LUMINANCE8UI_EXT:
1181 case GL_LUMINANCE_ALPHA8UI_EXT:
1182 case GL_RGBA32I_EXT:
1183 case GL_RGB32I_EXT:
1184 case GL_RG32I:
1185 case GL_R32I:
1186 case GL_ALPHA32I_EXT:
1187 case GL_INTENSITY32I_EXT:
1188 case GL_LUMINANCE32I_EXT:
1189 case GL_LUMINANCE_ALPHA32I_EXT:
1190 case GL_RGBA16I_EXT:
1191 case GL_RGB16I_EXT:
1192 case GL_RG16I:
1193 case GL_R16I:
1194 case GL_ALPHA16I_EXT:
1195 case GL_INTENSITY16I_EXT:
1196 case GL_LUMINANCE16I_EXT:
1197 case GL_LUMINANCE_ALPHA16I_EXT:
1198 case GL_RGBA8I_EXT:
1199 case GL_RGB8I_EXT:
1200 case GL_RG8I:
1201 case GL_R8I:
1202 case GL_ALPHA8I_EXT:
1203 case GL_INTENSITY8I_EXT:
1204 case GL_LUMINANCE8I_EXT:
1205 case GL_LUMINANCE_ALPHA8I_EXT:
1206 /* signed, normalized texture formats */
1207 case GL_RED_SNORM:
1208 case GL_R8_SNORM:
1209 case GL_R16_SNORM:
1210 case GL_RG_SNORM:
1211 case GL_RG8_SNORM:
1212 case GL_RG16_SNORM:
1213 case GL_RGB_SNORM:
1214 case GL_RGB8_SNORM:
1215 case GL_RGB16_SNORM:
1216 case GL_RGBA_SNORM:
1217 case GL_RGBA8_SNORM:
1218 case GL_RGBA16_SNORM:
1219 case GL_ALPHA_SNORM:
1220 case GL_ALPHA8_SNORM:
1221 case GL_ALPHA16_SNORM:
1222 case GL_LUMINANCE_SNORM:
1223 case GL_LUMINANCE8_SNORM:
1224 case GL_LUMINANCE16_SNORM:
1225 case GL_LUMINANCE_ALPHA_SNORM:
1226 case GL_LUMINANCE8_ALPHA8_SNORM:
1227 case GL_LUMINANCE16_ALPHA16_SNORM:
1228 case GL_INTENSITY_SNORM:
1229 case GL_INTENSITY8_SNORM:
1230 case GL_INTENSITY16_SNORM:
1231 case GL_RGB9_E5:
1232 case GL_R11F_G11F_B10F:
1233 case GL_RGB10_A2UI:
1234 return GL_TRUE;
1235 case GL_YCBCR_MESA: /* not considered to be RGB */
1236 /* fall-through */
1237 default:
1238 return GL_FALSE;
1239 }
1240 }
1241
1242
1243 /**
1244 * Test if the given image format is a depth component format.
1245 */
1246 GLboolean
1247 _mesa_is_depth_format(GLenum format)
1248 {
1249 switch (format) {
1250 case GL_DEPTH_COMPONENT:
1251 case GL_DEPTH_COMPONENT16:
1252 case GL_DEPTH_COMPONENT24:
1253 case GL_DEPTH_COMPONENT32:
1254 case GL_DEPTH_COMPONENT32F:
1255 return GL_TRUE;
1256 default:
1257 return GL_FALSE;
1258 }
1259 }
1260
1261
1262 /**
1263 * Test if the given image format is a stencil format.
1264 */
1265 GLboolean
1266 _mesa_is_stencil_format(GLenum format)
1267 {
1268 switch (format) {
1269 case GL_STENCIL_INDEX:
1270 return GL_TRUE;
1271 default:
1272 return GL_FALSE;
1273 }
1274 }
1275
1276
1277 /**
1278 * Test if the given image format is a YCbCr format.
1279 */
1280 GLboolean
1281 _mesa_is_ycbcr_format(GLenum format)
1282 {
1283 switch (format) {
1284 case GL_YCBCR_MESA:
1285 return GL_TRUE;
1286 default:
1287 return GL_FALSE;
1288 }
1289 }
1290
1291
1292 /**
1293 * Test if the given image format is a depth+stencil format.
1294 */
1295 GLboolean
1296 _mesa_is_depthstencil_format(GLenum format)
1297 {
1298 switch (format) {
1299 case GL_DEPTH24_STENCIL8_EXT:
1300 case GL_DEPTH_STENCIL_EXT:
1301 case GL_DEPTH32F_STENCIL8:
1302 return GL_TRUE;
1303 default:
1304 return GL_FALSE;
1305 }
1306 }
1307
1308
1309 /**
1310 * Test if the given image format is a depth or stencil format.
1311 */
1312 GLboolean
1313 _mesa_is_depth_or_stencil_format(GLenum format)
1314 {
1315 switch (format) {
1316 case GL_DEPTH_COMPONENT:
1317 case GL_DEPTH_COMPONENT16:
1318 case GL_DEPTH_COMPONENT24:
1319 case GL_DEPTH_COMPONENT32:
1320 case GL_STENCIL_INDEX:
1321 case GL_STENCIL_INDEX1_EXT:
1322 case GL_STENCIL_INDEX4_EXT:
1323 case GL_STENCIL_INDEX8_EXT:
1324 case GL_STENCIL_INDEX16_EXT:
1325 case GL_DEPTH_STENCIL_EXT:
1326 case GL_DEPTH24_STENCIL8_EXT:
1327 case GL_DEPTH_COMPONENT32F:
1328 case GL_DEPTH32F_STENCIL8:
1329 return GL_TRUE;
1330 default:
1331 return GL_FALSE;
1332 }
1333 }
1334
1335
1336 /**
1337 * Test if an image format is a supported compressed format.
1338 * \param format the internal format token provided by the user.
1339 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1340 */
1341 GLboolean
1342 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1343 {
1344 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1345
1346 /* Some formats in this switch have an equivalent mesa_format_layout
1347 * to the compressed formats in the layout switch below and thus
1348 * must be handled first.
1349 */
1350 switch (format) {
1351 case GL_RGB_S3TC:
1352 case GL_RGB4_S3TC:
1353 case GL_RGBA_S3TC:
1354 case GL_RGBA4_S3TC:
1355 return _mesa_is_desktop_gl(ctx) &&
1356 ctx->Extensions.ANGLE_texture_compression_dxt;
1357 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1358 return ctx->API == API_OPENGL_COMPAT
1359 && ctx->Extensions.ATI_texture_compression_3dc;
1360 case GL_PALETTE4_RGB8_OES:
1361 case GL_PALETTE4_RGBA8_OES:
1362 case GL_PALETTE4_R5_G6_B5_OES:
1363 case GL_PALETTE4_RGBA4_OES:
1364 case GL_PALETTE4_RGB5_A1_OES:
1365 case GL_PALETTE8_RGB8_OES:
1366 case GL_PALETTE8_RGBA8_OES:
1367 case GL_PALETTE8_R5_G6_B5_OES:
1368 case GL_PALETTE8_RGBA4_OES:
1369 case GL_PALETTE8_RGB5_A1_OES:
1370 return ctx->API == API_OPENGLES;
1371 }
1372
1373 switch (_mesa_get_format_layout(m_format)) {
1374 case MESA_FORMAT_LAYOUT_S3TC:
1375 if (_mesa_get_format_color_encoding(m_format) == GL_LINEAR) {
1376 /* Assume that the ANGLE flag will always be set if the
1377 * EXT flag is set.
1378 */
1379 return ctx->Extensions.ANGLE_texture_compression_dxt;
1380 } else {
1381 return _mesa_is_desktop_gl(ctx)
1382 && ctx->Extensions.EXT_texture_sRGB
1383 && ctx->Extensions.EXT_texture_compression_s3tc;
1384 }
1385 case MESA_FORMAT_LAYOUT_FXT1:
1386 return _mesa_is_desktop_gl(ctx)
1387 && ctx->Extensions.TDFX_texture_compression_FXT1;
1388 case MESA_FORMAT_LAYOUT_RGTC:
1389 return _mesa_is_desktop_gl(ctx)
1390 && ctx->Extensions.ARB_texture_compression_rgtc;
1391 case MESA_FORMAT_LAYOUT_LATC:
1392 return ctx->API == API_OPENGL_COMPAT
1393 && ctx->Extensions.EXT_texture_compression_latc;
1394 case MESA_FORMAT_LAYOUT_ETC1:
1395 return _mesa_is_gles(ctx)
1396 && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
1397 case MESA_FORMAT_LAYOUT_ETC2:
1398 return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
1399 case MESA_FORMAT_LAYOUT_BPTC:
1400 return _mesa_is_desktop_gl(ctx) &&
1401 ctx->Extensions.ARB_texture_compression_bptc;
1402 case MESA_FORMAT_LAYOUT_ASTC:
1403 return ctx->Extensions.KHR_texture_compression_astc_ldr;
1404 default:
1405 return GL_FALSE;
1406 }
1407 }
1408
1409 /**
1410 * Test if the given format represents an sRGB format.
1411 * \param format the GL format (can be an internal format)
1412 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1413 */
1414 GLboolean
1415 _mesa_is_srgb_format(GLenum format)
1416 {
1417 switch (format) {
1418 case GL_SRGB:
1419 case GL_SRGB8:
1420 case GL_SRGB_ALPHA:
1421 case GL_SRGB8_ALPHA8:
1422 case GL_COMPRESSED_SRGB:
1423 case GL_COMPRESSED_SRGB_ALPHA:
1424 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1425 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1426 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1427 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1428 case GL_COMPRESSED_SRGB8_ETC2:
1429 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1430 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1431 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1432 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1433 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1434 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1435 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1436 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1437 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1438 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1439 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1440 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1441 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1442 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1443 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1444 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1445 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1446 return GL_TRUE;
1447 default:
1448 break;
1449 }
1450
1451 return GL_FALSE;
1452 }
1453
1454 /**
1455 * Convert various unpack formats to the corresponding base format.
1456 */
1457 GLenum
1458 _mesa_unpack_format_to_base_format(GLenum format)
1459 {
1460 switch(format) {
1461 case GL_RED_INTEGER:
1462 return GL_RED;
1463 case GL_GREEN_INTEGER:
1464 return GL_GREEN;
1465 case GL_BLUE_INTEGER:
1466 return GL_BLUE;
1467 case GL_ALPHA_INTEGER:
1468 return GL_ALPHA;
1469 case GL_RG_INTEGER:
1470 return GL_RG;
1471 case GL_RGB_INTEGER:
1472 return GL_RGB;
1473 case GL_RGBA_INTEGER:
1474 return GL_RGBA;
1475 case GL_BGR_INTEGER:
1476 return GL_BGR;
1477 case GL_BGRA_INTEGER:
1478 return GL_BGRA;
1479 case GL_LUMINANCE_INTEGER_EXT:
1480 return GL_LUMINANCE;
1481 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1482 return GL_LUMINANCE_ALPHA;
1483 case GL_RED:
1484 case GL_GREEN:
1485 case GL_BLUE:
1486 case GL_RG:
1487 case GL_RGB:
1488 case GL_RGBA:
1489 case GL_BGR:
1490 case GL_BGRA:
1491 case GL_ALPHA:
1492 case GL_LUMINANCE:
1493 case GL_LUMINANCE_ALPHA:
1494 default:
1495 return format;
1496 }
1497 }
1498
1499 /**
1500 * Convert various base formats to the corresponding integer format.
1501 */
1502 GLenum
1503 _mesa_base_format_to_integer_format(GLenum format)
1504 {
1505 switch(format) {
1506 case GL_RED:
1507 return GL_RED_INTEGER;
1508 case GL_GREEN:
1509 return GL_GREEN_INTEGER;
1510 case GL_BLUE:
1511 return GL_BLUE_INTEGER;
1512 case GL_RG:
1513 return GL_RG_INTEGER;
1514 case GL_RGB:
1515 return GL_RGB_INTEGER;
1516 case GL_RGBA:
1517 return GL_RGBA_INTEGER;
1518 case GL_BGR:
1519 return GL_BGR_INTEGER;
1520 case GL_BGRA:
1521 return GL_BGRA_INTEGER;
1522 case GL_ALPHA:
1523 return GL_ALPHA_INTEGER;
1524 case GL_LUMINANCE:
1525 return GL_LUMINANCE_INTEGER_EXT;
1526 case GL_LUMINANCE_ALPHA:
1527 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1528 }
1529
1530 return format;
1531 }
1532
1533
1534 /**
1535 * Does the given base texture/renderbuffer format have the channel
1536 * named by 'pname'?
1537 */
1538 GLboolean
1539 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1540 {
1541 switch (pname) {
1542 case GL_TEXTURE_RED_SIZE:
1543 case GL_TEXTURE_RED_TYPE:
1544 case GL_RENDERBUFFER_RED_SIZE_EXT:
1545 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1546 case GL_INTERNALFORMAT_RED_SIZE:
1547 case GL_INTERNALFORMAT_RED_TYPE:
1548 if (base_format == GL_RED ||
1549 base_format == GL_RG ||
1550 base_format == GL_RGB ||
1551 base_format == GL_RGBA) {
1552 return GL_TRUE;
1553 }
1554 return GL_FALSE;
1555 case GL_TEXTURE_GREEN_SIZE:
1556 case GL_TEXTURE_GREEN_TYPE:
1557 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1558 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1559 case GL_INTERNALFORMAT_GREEN_SIZE:
1560 case GL_INTERNALFORMAT_GREEN_TYPE:
1561 if (base_format == GL_RG ||
1562 base_format == GL_RGB ||
1563 base_format == GL_RGBA) {
1564 return GL_TRUE;
1565 }
1566 return GL_FALSE;
1567 case GL_TEXTURE_BLUE_SIZE:
1568 case GL_TEXTURE_BLUE_TYPE:
1569 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1570 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1571 case GL_INTERNALFORMAT_BLUE_SIZE:
1572 case GL_INTERNALFORMAT_BLUE_TYPE:
1573 if (base_format == GL_RGB ||
1574 base_format == GL_RGBA) {
1575 return GL_TRUE;
1576 }
1577 return GL_FALSE;
1578 case GL_TEXTURE_ALPHA_SIZE:
1579 case GL_TEXTURE_ALPHA_TYPE:
1580 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1581 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1582 case GL_INTERNALFORMAT_ALPHA_SIZE:
1583 case GL_INTERNALFORMAT_ALPHA_TYPE:
1584 if (base_format == GL_RGBA ||
1585 base_format == GL_ALPHA ||
1586 base_format == GL_LUMINANCE_ALPHA) {
1587 return GL_TRUE;
1588 }
1589 return GL_FALSE;
1590 case GL_TEXTURE_LUMINANCE_SIZE:
1591 case GL_TEXTURE_LUMINANCE_TYPE:
1592 if (base_format == GL_LUMINANCE ||
1593 base_format == GL_LUMINANCE_ALPHA) {
1594 return GL_TRUE;
1595 }
1596 return GL_FALSE;
1597 case GL_TEXTURE_INTENSITY_SIZE:
1598 case GL_TEXTURE_INTENSITY_TYPE:
1599 if (base_format == GL_INTENSITY) {
1600 return GL_TRUE;
1601 }
1602 return GL_FALSE;
1603 case GL_TEXTURE_DEPTH_SIZE:
1604 case GL_TEXTURE_DEPTH_TYPE:
1605 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1606 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1607 case GL_INTERNALFORMAT_DEPTH_SIZE:
1608 case GL_INTERNALFORMAT_DEPTH_TYPE:
1609 if (base_format == GL_DEPTH_STENCIL ||
1610 base_format == GL_DEPTH_COMPONENT) {
1611 return GL_TRUE;
1612 }
1613 return GL_FALSE;
1614 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1615 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1616 case GL_INTERNALFORMAT_STENCIL_SIZE:
1617 case GL_INTERNALFORMAT_STENCIL_TYPE:
1618 if (base_format == GL_DEPTH_STENCIL ||
1619 base_format == GL_STENCIL_INDEX) {
1620 return GL_TRUE;
1621 }
1622 return GL_FALSE;
1623 default:
1624 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1625 __func__, pname);
1626 return GL_FALSE;
1627 }
1628
1629 return GL_FALSE;
1630 }
1631
1632
1633 /**
1634 * If format is a generic compressed format, return the corresponding
1635 * non-compressed format. For other formats, return the format as-is.
1636 */
1637 GLenum
1638 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1639 {
1640 switch (format) {
1641 case GL_COMPRESSED_RED:
1642 return GL_RED;
1643 case GL_COMPRESSED_RG:
1644 return GL_RG;
1645 case GL_COMPRESSED_RGB:
1646 return GL_RGB;
1647 case GL_COMPRESSED_RGBA:
1648 return GL_RGBA;
1649 case GL_COMPRESSED_ALPHA:
1650 return GL_ALPHA;
1651 case GL_COMPRESSED_LUMINANCE:
1652 return GL_LUMINANCE;
1653 case GL_COMPRESSED_LUMINANCE_ALPHA:
1654 return GL_LUMINANCE_ALPHA;
1655 case GL_COMPRESSED_INTENSITY:
1656 return GL_INTENSITY;
1657 /* sRGB formats */
1658 case GL_COMPRESSED_SRGB:
1659 return GL_SRGB;
1660 case GL_COMPRESSED_SRGB_ALPHA:
1661 return GL_SRGB_ALPHA;
1662 case GL_COMPRESSED_SLUMINANCE:
1663 return GL_SLUMINANCE;
1664 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1665 return GL_SLUMINANCE_ALPHA;
1666 default:
1667 return format;
1668 }
1669 }
1670
1671
1672 /**
1673 * Return the equivalent non-generic internal format.
1674 * This is useful for comparing whether two internal formats are equivalent.
1675 */
1676 GLenum
1677 _mesa_get_nongeneric_internalformat(GLenum format)
1678 {
1679 switch (format) {
1680 /* GL 1.1 formats. */
1681 case 4:
1682 case GL_RGBA:
1683 return GL_RGBA8;
1684 case 3:
1685 case GL_RGB:
1686 return GL_RGB8;
1687 case 2:
1688 case GL_LUMINANCE_ALPHA:
1689 return GL_LUMINANCE8_ALPHA8;
1690 case 1:
1691 case GL_LUMINANCE:
1692 return GL_LUMINANCE8;
1693 case GL_ALPHA:
1694 return GL_ALPHA8;
1695 case GL_INTENSITY:
1696 return GL_INTENSITY8;
1697
1698 /* GL_ARB_texture_rg */
1699 case GL_RED:
1700 return GL_R8;
1701 case GL_RG:
1702 return GL_RG8;
1703
1704 /* GL_EXT_texture_sRGB */
1705 case GL_SRGB:
1706 return GL_SRGB8;
1707 case GL_SRGB_ALPHA:
1708 return GL_SRGB8_ALPHA8;
1709 case GL_SLUMINANCE:
1710 return GL_SLUMINANCE8;
1711 case GL_SLUMINANCE_ALPHA:
1712 return GL_SLUMINANCE8_ALPHA8;
1713
1714 /* GL_EXT_texture_snorm */
1715 case GL_RGBA_SNORM:
1716 return GL_RGBA8_SNORM;
1717 case GL_RGB_SNORM:
1718 return GL_RGB8_SNORM;
1719 case GL_RG_SNORM:
1720 return GL_RG8_SNORM;
1721 case GL_RED_SNORM:
1722 return GL_R8_SNORM;
1723 case GL_LUMINANCE_ALPHA_SNORM:
1724 return GL_LUMINANCE8_ALPHA8_SNORM;
1725 case GL_LUMINANCE_SNORM:
1726 return GL_LUMINANCE8_SNORM;
1727 case GL_ALPHA_SNORM:
1728 return GL_ALPHA8_SNORM;
1729 case GL_INTENSITY_SNORM:
1730 return GL_INTENSITY8_SNORM;
1731
1732 default:
1733 return format;
1734 }
1735 }
1736
1737
1738 /**
1739 * Convert an sRGB internal format to linear.
1740 */
1741 GLenum
1742 _mesa_get_linear_internalformat(GLenum format)
1743 {
1744 switch (format) {
1745 case GL_SRGB:
1746 return GL_RGB;
1747 case GL_SRGB_ALPHA:
1748 return GL_RGBA;
1749 case GL_SRGB8:
1750 return GL_RGB8;
1751 case GL_SRGB8_ALPHA8:
1752 return GL_RGBA8;
1753 case GL_SLUMINANCE8:
1754 return GL_LUMINANCE8;
1755 case GL_SLUMINANCE:
1756 return GL_LUMINANCE;
1757 case GL_SLUMINANCE_ALPHA:
1758 return GL_LUMINANCE_ALPHA;
1759 case GL_SLUMINANCE8_ALPHA8:
1760 return GL_LUMINANCE8_ALPHA8;
1761 default:
1762 return format;
1763 }
1764 }
1765
1766
1767 /**
1768 * Do error checking of format/type combinations for glReadPixels,
1769 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1770 * and type values, we may either generate GL_INVALID_OPERATION or
1771 * GL_INVALID_ENUM.
1772 *
1773 * \param format pixel format.
1774 * \param type pixel type.
1775 *
1776 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1777 */
1778 GLenum
1779 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1780 GLenum format, GLenum type)
1781 {
1782 /* From OpenGL 3.3 spec, page 220:
1783 * "If the format is DEPTH_STENCIL, then values are taken from
1784 * both the depth buffer and the stencil buffer. If there is no
1785 * depth buffer or if there is no stencil buffer, then the error
1786 * INVALID_OPERATION occurs. If the type parameter is not
1787 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1788 * error INVALID_ENUM occurs."
1789 *
1790 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1791 * cannot be used to read depth or stencil in that API.
1792 */
1793 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1794 && type != GL_UNSIGNED_INT_24_8
1795 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1796 return GL_INVALID_ENUM;
1797
1798 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1799 switch (type) {
1800 case GL_BITMAP:
1801 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1802 return GL_INVALID_ENUM;
1803 }
1804 break;
1805
1806 case GL_UNSIGNED_BYTE_3_3_2:
1807 case GL_UNSIGNED_BYTE_2_3_3_REV:
1808 case GL_UNSIGNED_SHORT_5_6_5:
1809 case GL_UNSIGNED_SHORT_5_6_5_REV:
1810 if (format == GL_RGB) {
1811 break; /* OK */
1812 }
1813 if (format == GL_RGB_INTEGER_EXT &&
1814 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1815 break; /* OK */
1816 }
1817 return GL_INVALID_OPERATION;
1818
1819 case GL_UNSIGNED_SHORT_4_4_4_4:
1820 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1821 case GL_UNSIGNED_INT_8_8_8_8:
1822 case GL_UNSIGNED_INT_8_8_8_8_REV:
1823 if (format == GL_RGBA ||
1824 format == GL_BGRA ||
1825 format == GL_ABGR_EXT) {
1826 break; /* OK */
1827 }
1828 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1829 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1830 break; /* OK */
1831 }
1832 return GL_INVALID_OPERATION;
1833
1834 case GL_UNSIGNED_SHORT_5_5_5_1:
1835 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1836 case GL_UNSIGNED_INT_10_10_10_2:
1837 case GL_UNSIGNED_INT_2_10_10_10_REV:
1838 if (format == GL_RGBA ||
1839 format == GL_BGRA) {
1840 break; /* OK */
1841 }
1842 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1843 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1844 break; /* OK */
1845 }
1846 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1847 ctx->API == API_OPENGLES2) {
1848 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1849 }
1850 return GL_INVALID_OPERATION;
1851
1852 case GL_UNSIGNED_INT_24_8:
1853 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1854 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1855 return GL_NO_ERROR;
1856
1857 if (format != GL_DEPTH_STENCIL) {
1858 return GL_INVALID_OPERATION;
1859 }
1860 return GL_NO_ERROR;
1861
1862 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1863 if (!ctx->Extensions.ARB_depth_buffer_float) {
1864 return GL_INVALID_ENUM;
1865 }
1866 if (format != GL_DEPTH_STENCIL) {
1867 return GL_INVALID_OPERATION;
1868 }
1869 return GL_NO_ERROR;
1870
1871 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1872 if (!ctx->Extensions.EXT_packed_float) {
1873 return GL_INVALID_ENUM;
1874 }
1875 if (format != GL_RGB) {
1876 return GL_INVALID_OPERATION;
1877 }
1878 return GL_NO_ERROR;
1879
1880 case GL_HALF_FLOAT_OES:
1881 switch (format) {
1882 case GL_RGBA:
1883 case GL_RGB:
1884 case GL_LUMINANCE_ALPHA:
1885 case GL_LUMINANCE:
1886 case GL_ALPHA:
1887 return GL_NO_ERROR;
1888 case GL_RG:
1889 case GL_RED:
1890 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1891 return GL_NO_ERROR;
1892 default:
1893 return GL_INVALID_OPERATION;
1894 }
1895
1896 default:
1897 ; /* fall-through */
1898 }
1899
1900 /* now, for each format, check the type for compatibility */
1901 switch (format) {
1902 case GL_COLOR_INDEX:
1903 case GL_STENCIL_INDEX:
1904 switch (type) {
1905 case GL_BITMAP:
1906 case GL_BYTE:
1907 case GL_UNSIGNED_BYTE:
1908 case GL_SHORT:
1909 case GL_UNSIGNED_SHORT:
1910 case GL_INT:
1911 case GL_UNSIGNED_INT:
1912 case GL_FLOAT:
1913 case GL_HALF_FLOAT:
1914 return GL_NO_ERROR;
1915 default:
1916 return GL_INVALID_ENUM;
1917 }
1918
1919 case GL_RED:
1920 case GL_GREEN:
1921 case GL_BLUE:
1922 case GL_ALPHA:
1923 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1924 case GL_INTENSITY:
1925 #endif
1926 case GL_LUMINANCE:
1927 case GL_LUMINANCE_ALPHA:
1928 case GL_DEPTH_COMPONENT:
1929 switch (type) {
1930 case GL_BYTE:
1931 case GL_UNSIGNED_BYTE:
1932 case GL_SHORT:
1933 case GL_UNSIGNED_SHORT:
1934 case GL_INT:
1935 case GL_UNSIGNED_INT:
1936 case GL_FLOAT:
1937 case GL_HALF_FLOAT:
1938 return GL_NO_ERROR;
1939 default:
1940 return GL_INVALID_ENUM;
1941 }
1942
1943 case GL_RG:
1944 if (!ctx->Extensions.ARB_texture_rg)
1945 return GL_INVALID_ENUM;
1946 switch (type) {
1947 case GL_BYTE:
1948 case GL_UNSIGNED_BYTE:
1949 case GL_SHORT:
1950 case GL_UNSIGNED_SHORT:
1951 case GL_INT:
1952 case GL_UNSIGNED_INT:
1953 case GL_FLOAT:
1954 case GL_HALF_FLOAT:
1955 return GL_NO_ERROR;
1956 default:
1957 return GL_INVALID_ENUM;
1958 }
1959
1960 case GL_RGB:
1961 switch (type) {
1962 case GL_BYTE:
1963 case GL_UNSIGNED_BYTE:
1964 case GL_SHORT:
1965 case GL_UNSIGNED_SHORT:
1966 case GL_INT:
1967 case GL_UNSIGNED_INT:
1968 case GL_FLOAT:
1969 case GL_UNSIGNED_BYTE_3_3_2:
1970 case GL_UNSIGNED_BYTE_2_3_3_REV:
1971 case GL_UNSIGNED_SHORT_5_6_5:
1972 case GL_UNSIGNED_SHORT_5_6_5_REV:
1973 case GL_HALF_FLOAT:
1974 return GL_NO_ERROR;
1975 case GL_UNSIGNED_INT_2_10_10_10_REV:
1976 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1977 return (ctx->API == API_OPENGLES2)
1978 ? GL_NO_ERROR : GL_INVALID_ENUM;
1979 case GL_UNSIGNED_INT_5_9_9_9_REV:
1980 return ctx->Extensions.EXT_texture_shared_exponent
1981 ? GL_NO_ERROR : GL_INVALID_ENUM;
1982 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1983 return ctx->Extensions.EXT_packed_float
1984 ? GL_NO_ERROR : GL_INVALID_ENUM;
1985 default:
1986 return GL_INVALID_ENUM;
1987 }
1988
1989 case GL_BGR:
1990 switch (type) {
1991 /* NOTE: no packed types are supported with BGR. That's
1992 * intentional, according to the GL spec.
1993 */
1994 case GL_BYTE:
1995 case GL_UNSIGNED_BYTE:
1996 case GL_SHORT:
1997 case GL_UNSIGNED_SHORT:
1998 case GL_INT:
1999 case GL_UNSIGNED_INT:
2000 case GL_FLOAT:
2001 case GL_HALF_FLOAT:
2002 return GL_NO_ERROR;
2003 default:
2004 return GL_INVALID_ENUM;
2005 }
2006
2007 case GL_RGBA:
2008 case GL_BGRA:
2009 switch (type) {
2010 case GL_BYTE:
2011 case GL_UNSIGNED_BYTE:
2012 case GL_SHORT:
2013 case GL_UNSIGNED_SHORT:
2014 case GL_INT:
2015 case GL_UNSIGNED_INT:
2016 case GL_FLOAT:
2017 case GL_UNSIGNED_SHORT_4_4_4_4:
2018 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2019 case GL_UNSIGNED_SHORT_5_5_5_1:
2020 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2021 case GL_UNSIGNED_INT_8_8_8_8:
2022 case GL_UNSIGNED_INT_8_8_8_8_REV:
2023 case GL_UNSIGNED_INT_10_10_10_2:
2024 case GL_UNSIGNED_INT_2_10_10_10_REV:
2025 case GL_HALF_FLOAT:
2026 return GL_NO_ERROR;
2027 default:
2028 return GL_INVALID_ENUM;
2029 }
2030
2031 case GL_ABGR_EXT:
2032 switch (type) {
2033 case GL_BYTE:
2034 case GL_UNSIGNED_BYTE:
2035 case GL_SHORT:
2036 case GL_UNSIGNED_SHORT:
2037 case GL_INT:
2038 case GL_UNSIGNED_INT:
2039 case GL_FLOAT:
2040 case GL_UNSIGNED_SHORT_4_4_4_4:
2041 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2042 case GL_UNSIGNED_INT_8_8_8_8:
2043 case GL_UNSIGNED_INT_8_8_8_8_REV:
2044 case GL_HALF_FLOAT:
2045 return GL_NO_ERROR;
2046 default:
2047 return GL_INVALID_ENUM;
2048 }
2049
2050 case GL_YCBCR_MESA:
2051 if (!ctx->Extensions.MESA_ycbcr_texture)
2052 return GL_INVALID_ENUM;
2053 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2054 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2055 return GL_NO_ERROR;
2056 else
2057 return GL_INVALID_OPERATION;
2058
2059 case GL_DEPTH_STENCIL:
2060 if (type == GL_UNSIGNED_INT_24_8)
2061 return GL_NO_ERROR;
2062 else if (ctx->Extensions.ARB_depth_buffer_float &&
2063 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2064 return GL_NO_ERROR;
2065 else
2066 return GL_INVALID_ENUM;
2067
2068 /* integer-valued formats */
2069 case GL_RED_INTEGER_EXT:
2070 case GL_GREEN_INTEGER_EXT:
2071 case GL_BLUE_INTEGER_EXT:
2072 case GL_ALPHA_INTEGER_EXT:
2073 case GL_RG_INTEGER:
2074 switch (type) {
2075 case GL_BYTE:
2076 case GL_UNSIGNED_BYTE:
2077 case GL_SHORT:
2078 case GL_UNSIGNED_SHORT:
2079 case GL_INT:
2080 case GL_UNSIGNED_INT:
2081 return (ctx->Version >= 30 ||
2082 ctx->Extensions.EXT_texture_integer)
2083 ? GL_NO_ERROR : GL_INVALID_ENUM;
2084 default:
2085 return GL_INVALID_ENUM;
2086 }
2087
2088 case GL_RGB_INTEGER_EXT:
2089 switch (type) {
2090 case GL_BYTE:
2091 case GL_UNSIGNED_BYTE:
2092 case GL_SHORT:
2093 case GL_UNSIGNED_SHORT:
2094 case GL_INT:
2095 case GL_UNSIGNED_INT:
2096 return (ctx->Version >= 30 ||
2097 ctx->Extensions.EXT_texture_integer)
2098 ? GL_NO_ERROR : GL_INVALID_ENUM;
2099 case GL_UNSIGNED_BYTE_3_3_2:
2100 case GL_UNSIGNED_BYTE_2_3_3_REV:
2101 case GL_UNSIGNED_SHORT_5_6_5:
2102 case GL_UNSIGNED_SHORT_5_6_5_REV:
2103 return ctx->Extensions.ARB_texture_rgb10_a2ui
2104 ? GL_NO_ERROR : GL_INVALID_ENUM;
2105 default:
2106 return GL_INVALID_ENUM;
2107 }
2108
2109 case GL_BGR_INTEGER_EXT:
2110 switch (type) {
2111 case GL_BYTE:
2112 case GL_UNSIGNED_BYTE:
2113 case GL_SHORT:
2114 case GL_UNSIGNED_SHORT:
2115 case GL_INT:
2116 case GL_UNSIGNED_INT:
2117 /* NOTE: no packed formats w/ BGR format */
2118 return (ctx->Version >= 30 ||
2119 ctx->Extensions.EXT_texture_integer)
2120 ? GL_NO_ERROR : GL_INVALID_ENUM;
2121 default:
2122 return GL_INVALID_ENUM;
2123 }
2124
2125 case GL_RGBA_INTEGER_EXT:
2126 case GL_BGRA_INTEGER_EXT:
2127 switch (type) {
2128 case GL_BYTE:
2129 case GL_UNSIGNED_BYTE:
2130 case GL_SHORT:
2131 case GL_UNSIGNED_SHORT:
2132 case GL_INT:
2133 case GL_UNSIGNED_INT:
2134 return (ctx->Version >= 30 ||
2135 ctx->Extensions.EXT_texture_integer)
2136 ? GL_NO_ERROR : GL_INVALID_ENUM;
2137 case GL_UNSIGNED_SHORT_4_4_4_4:
2138 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2139 case GL_UNSIGNED_SHORT_5_5_5_1:
2140 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2141 case GL_UNSIGNED_INT_8_8_8_8:
2142 case GL_UNSIGNED_INT_8_8_8_8_REV:
2143 case GL_UNSIGNED_INT_10_10_10_2:
2144 case GL_UNSIGNED_INT_2_10_10_10_REV:
2145 return ctx->Extensions.ARB_texture_rgb10_a2ui
2146 ? GL_NO_ERROR : GL_INVALID_ENUM;
2147 default:
2148 return GL_INVALID_ENUM;
2149 }
2150
2151 case GL_LUMINANCE_INTEGER_EXT:
2152 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2153 switch (type) {
2154 case GL_BYTE:
2155 case GL_UNSIGNED_BYTE:
2156 case GL_SHORT:
2157 case GL_UNSIGNED_SHORT:
2158 case GL_INT:
2159 case GL_UNSIGNED_INT:
2160 return ctx->Extensions.EXT_texture_integer
2161 ? GL_NO_ERROR : GL_INVALID_ENUM;
2162 default:
2163 return GL_INVALID_ENUM;
2164 }
2165
2166 default:
2167 return GL_INVALID_ENUM;
2168 }
2169 return GL_NO_ERROR;
2170 }
2171
2172
2173 /**
2174 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2175 * and glTex[Sub]Image.
2176 * \return error code, or GL_NO_ERROR.
2177 */
2178 GLenum
2179 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2180 GLenum format, GLenum type,
2181 unsigned dimensions)
2182 {
2183 GLboolean type_valid = GL_TRUE;
2184
2185 switch (format) {
2186 case GL_RED:
2187 case GL_RG:
2188 if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_texture_rg)
2189 return GL_INVALID_VALUE;
2190 /* fallthrough */
2191 case GL_ALPHA:
2192 case GL_LUMINANCE:
2193 case GL_LUMINANCE_ALPHA:
2194 type_valid = (type == GL_UNSIGNED_BYTE
2195 || type == GL_FLOAT
2196 || type == GL_HALF_FLOAT_OES);
2197 break;
2198
2199 case GL_RGB:
2200 type_valid = (type == GL_UNSIGNED_BYTE
2201 || type == GL_UNSIGNED_SHORT_5_6_5
2202 || type == GL_FLOAT
2203 || type == GL_HALF_FLOAT_OES);
2204 break;
2205
2206 case GL_RGBA:
2207 type_valid = (type == GL_UNSIGNED_BYTE
2208 || type == GL_UNSIGNED_SHORT_4_4_4_4
2209 || type == GL_UNSIGNED_SHORT_5_5_5_1
2210 || type == GL_FLOAT
2211 || type == GL_HALF_FLOAT_OES
2212 || (ctx->Extensions.EXT_texture_type_2_10_10_10_REV &&
2213 type == GL_UNSIGNED_INT_2_10_10_10_REV));
2214 break;
2215
2216 case GL_DEPTH_COMPONENT:
2217 /* This format is filtered against invalid dimensionalities elsewhere.
2218 */
2219 type_valid = (type == GL_UNSIGNED_SHORT
2220 || type == GL_UNSIGNED_INT);
2221 break;
2222
2223 case GL_DEPTH_STENCIL:
2224 /* This format is filtered against invalid dimensionalities elsewhere.
2225 */
2226 type_valid = (type == GL_UNSIGNED_INT_24_8);
2227 break;
2228
2229 case GL_BGRA_EXT:
2230 type_valid = (type == GL_UNSIGNED_BYTE);
2231
2232 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2233 * the format does not appear to be allowed for 3D textures in OpenGL
2234 * ES.
2235 */
2236 if (dimensions != 2)
2237 return GL_INVALID_VALUE;
2238
2239 break;
2240
2241 default:
2242 return GL_INVALID_VALUE;
2243 }
2244
2245 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2246 }
2247
2248 /**
2249 * Return the simple base format for a given internal texture format.
2250 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2251 *
2252 * \param ctx GL context.
2253 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2254 *
2255 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2256 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2257 *
2258 * This is the format which is used during texture application (i.e. the
2259 * texture format and env mode determine the arithmetic used.
2260 */
2261 GLint
2262 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2263 {
2264 switch (internalFormat) {
2265 case GL_ALPHA:
2266 case GL_ALPHA4:
2267 case GL_ALPHA8:
2268 case GL_ALPHA12:
2269 case GL_ALPHA16:
2270 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2271 case 1:
2272 case GL_LUMINANCE:
2273 case GL_LUMINANCE4:
2274 case GL_LUMINANCE8:
2275 case GL_LUMINANCE12:
2276 case GL_LUMINANCE16:
2277 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2278 case 2:
2279 case GL_LUMINANCE_ALPHA:
2280 case GL_LUMINANCE4_ALPHA4:
2281 case GL_LUMINANCE6_ALPHA2:
2282 case GL_LUMINANCE8_ALPHA8:
2283 case GL_LUMINANCE12_ALPHA4:
2284 case GL_LUMINANCE12_ALPHA12:
2285 case GL_LUMINANCE16_ALPHA16:
2286 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2287 case GL_INTENSITY:
2288 case GL_INTENSITY4:
2289 case GL_INTENSITY8:
2290 case GL_INTENSITY12:
2291 case GL_INTENSITY16:
2292 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2293 case 3:
2294 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2295 case GL_RGB:
2296 case GL_R3_G3_B2:
2297 case GL_RGB4:
2298 case GL_RGB5:
2299 case GL_RGB8:
2300 case GL_RGB10:
2301 case GL_RGB12:
2302 case GL_RGB16:
2303 return GL_RGB;
2304 case 4:
2305 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2306 case GL_RGBA:
2307 case GL_RGBA2:
2308 case GL_RGBA4:
2309 case GL_RGB5_A1:
2310 case GL_RGBA8:
2311 case GL_RGB10_A2:
2312 case GL_RGBA12:
2313 case GL_RGBA16:
2314 return GL_RGBA;
2315 default:
2316 ; /* fallthrough */
2317 }
2318
2319 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2320 */
2321 if (_mesa_is_gles(ctx)) {
2322 switch (internalFormat) {
2323 case GL_BGRA:
2324 return GL_RGBA;
2325 default:
2326 ; /* fallthrough */
2327 }
2328 }
2329
2330 if (ctx->Extensions.ARB_ES2_compatibility) {
2331 switch (internalFormat) {
2332 case GL_RGB565:
2333 return GL_RGB;
2334 default:
2335 ; /* fallthrough */
2336 }
2337 }
2338
2339 if (ctx->Extensions.ARB_depth_texture) {
2340 switch (internalFormat) {
2341 case GL_DEPTH_COMPONENT:
2342 case GL_DEPTH_COMPONENT16:
2343 case GL_DEPTH_COMPONENT24:
2344 case GL_DEPTH_COMPONENT32:
2345 return GL_DEPTH_COMPONENT;
2346 case GL_DEPTH_STENCIL:
2347 case GL_DEPTH24_STENCIL8:
2348 return GL_DEPTH_STENCIL;
2349 default:
2350 ; /* fallthrough */
2351 }
2352 }
2353
2354 if (ctx->Extensions.ARB_texture_stencil8) {
2355 switch (internalFormat) {
2356 case GL_STENCIL_INDEX:
2357 case GL_STENCIL_INDEX1:
2358 case GL_STENCIL_INDEX4:
2359 case GL_STENCIL_INDEX8:
2360 case GL_STENCIL_INDEX16:
2361 return GL_STENCIL_INDEX;
2362 default:
2363 ; /* fallthrough */
2364 }
2365 }
2366
2367 switch (internalFormat) {
2368 case GL_COMPRESSED_ALPHA:
2369 return GL_ALPHA;
2370 case GL_COMPRESSED_LUMINANCE:
2371 return GL_LUMINANCE;
2372 case GL_COMPRESSED_LUMINANCE_ALPHA:
2373 return GL_LUMINANCE_ALPHA;
2374 case GL_COMPRESSED_INTENSITY:
2375 return GL_INTENSITY;
2376 case GL_COMPRESSED_RGB:
2377 return GL_RGB;
2378 case GL_COMPRESSED_RGBA:
2379 return GL_RGBA;
2380 default:
2381 ; /* fallthrough */
2382 }
2383
2384 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2385 GLenum base_compressed =
2386 _mesa_gl_compressed_format_base_format(internalFormat);
2387 if (base_compressed)
2388 return base_compressed;
2389 }
2390
2391 if ((ctx->Extensions.KHR_texture_compression_astc_ldr &&
2392 is_astc_2d_format(internalFormat)) ||
2393 (ctx->Extensions.OES_texture_compression_astc &&
2394 is_astc_3d_format(internalFormat)))
2395 return GL_RGBA;
2396
2397 if (ctx->Extensions.MESA_ycbcr_texture) {
2398 if (internalFormat == GL_YCBCR_MESA)
2399 return GL_YCBCR_MESA;
2400 }
2401
2402 if (ctx->Extensions.ARB_texture_float) {
2403 switch (internalFormat) {
2404 case GL_ALPHA16F_ARB:
2405 case GL_ALPHA32F_ARB:
2406 return GL_ALPHA;
2407 case GL_RGBA16F_ARB:
2408 case GL_RGBA32F_ARB:
2409 return GL_RGBA;
2410 case GL_RGB16F_ARB:
2411 case GL_RGB32F_ARB:
2412 return GL_RGB;
2413 case GL_INTENSITY16F_ARB:
2414 case GL_INTENSITY32F_ARB:
2415 return GL_INTENSITY;
2416 case GL_LUMINANCE16F_ARB:
2417 case GL_LUMINANCE32F_ARB:
2418 return GL_LUMINANCE;
2419 case GL_LUMINANCE_ALPHA16F_ARB:
2420 case GL_LUMINANCE_ALPHA32F_ARB:
2421 return GL_LUMINANCE_ALPHA;
2422 default:
2423 ; /* fallthrough */
2424 }
2425 }
2426
2427 if (ctx->Extensions.EXT_texture_snorm) {
2428 switch (internalFormat) {
2429 case GL_RED_SNORM:
2430 case GL_R8_SNORM:
2431 case GL_R16_SNORM:
2432 return GL_RED;
2433 case GL_RG_SNORM:
2434 case GL_RG8_SNORM:
2435 case GL_RG16_SNORM:
2436 return GL_RG;
2437 case GL_RGB_SNORM:
2438 case GL_RGB8_SNORM:
2439 case GL_RGB16_SNORM:
2440 return GL_RGB;
2441 case GL_RGBA_SNORM:
2442 case GL_RGBA8_SNORM:
2443 case GL_RGBA16_SNORM:
2444 return GL_RGBA;
2445 case GL_ALPHA_SNORM:
2446 case GL_ALPHA8_SNORM:
2447 case GL_ALPHA16_SNORM:
2448 return GL_ALPHA;
2449 case GL_LUMINANCE_SNORM:
2450 case GL_LUMINANCE8_SNORM:
2451 case GL_LUMINANCE16_SNORM:
2452 return GL_LUMINANCE;
2453 case GL_LUMINANCE_ALPHA_SNORM:
2454 case GL_LUMINANCE8_ALPHA8_SNORM:
2455 case GL_LUMINANCE16_ALPHA16_SNORM:
2456 return GL_LUMINANCE_ALPHA;
2457 case GL_INTENSITY_SNORM:
2458 case GL_INTENSITY8_SNORM:
2459 case GL_INTENSITY16_SNORM:
2460 return GL_INTENSITY;
2461 default:
2462 ; /* fallthrough */
2463 }
2464 }
2465
2466 if (ctx->Extensions.EXT_texture_sRGB) {
2467 switch (internalFormat) {
2468 case GL_SRGB_EXT:
2469 case GL_SRGB8_EXT:
2470 case GL_COMPRESSED_SRGB_EXT:
2471 return GL_RGB;
2472 case GL_SRGB_ALPHA_EXT:
2473 case GL_SRGB8_ALPHA8_EXT:
2474 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2475 return GL_RGBA;
2476 case GL_SLUMINANCE_ALPHA_EXT:
2477 case GL_SLUMINANCE8_ALPHA8_EXT:
2478 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2479 return GL_LUMINANCE_ALPHA;
2480 case GL_SLUMINANCE_EXT:
2481 case GL_SLUMINANCE8_EXT:
2482 case GL_COMPRESSED_SLUMINANCE_EXT:
2483 return GL_LUMINANCE;
2484 default:
2485 ; /* fallthrough */
2486 }
2487 }
2488
2489 if (ctx->Extensions.EXT_texture_sRGB_R8) {
2490 switch (internalFormat) {
2491 case GL_SR8_EXT:
2492 return GL_RED;
2493 default:
2494 ; /* fallthrough */
2495 }
2496 }
2497
2498 if (ctx->Version >= 30 ||
2499 ctx->Extensions.EXT_texture_integer) {
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 (ctx->Extensions.ARB_texture_rgb10_a2ui) {
2519 switch (internalFormat) {
2520 case GL_RGB10_A2UI:
2521 return GL_RGBA;
2522 }
2523 }
2524
2525 if (ctx->Extensions.EXT_texture_integer) {
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 (ctx->Extensions.ARB_texture_rg) {
2561 switch (internalFormat) {
2562 case GL_R16F:
2563 case GL_R32F:
2564 if (!ctx->Extensions.ARB_texture_float)
2565 break;
2566 return GL_RED;
2567 case GL_R8I:
2568 case GL_R8UI:
2569 case GL_R16I:
2570 case GL_R16UI:
2571 case GL_R32I:
2572 case GL_R32UI:
2573 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2574 break;
2575 /* FALLTHROUGH */
2576 case GL_R8:
2577 case GL_R16:
2578 case GL_RED:
2579 case GL_COMPRESSED_RED:
2580 return GL_RED;
2581
2582 case GL_RG16F:
2583 case GL_RG32F:
2584 if (!ctx->Extensions.ARB_texture_float)
2585 break;
2586 return GL_RG;
2587 case GL_RG8I:
2588 case GL_RG8UI:
2589 case GL_RG16I:
2590 case GL_RG16UI:
2591 case GL_RG32I:
2592 case GL_RG32UI:
2593 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2594 break;
2595 /* FALLTHROUGH */
2596 case GL_RG:
2597 case GL_RG8:
2598 case GL_RG16:
2599 case GL_COMPRESSED_RG:
2600 return GL_RG;
2601 default:
2602 ; /* fallthrough */
2603 }
2604 }
2605
2606 if (ctx->Extensions.EXT_texture_shared_exponent) {
2607 switch (internalFormat) {
2608 case GL_RGB9_E5_EXT:
2609 return GL_RGB;
2610 default:
2611 ; /* fallthrough */
2612 }
2613 }
2614
2615 if (ctx->Extensions.EXT_packed_float) {
2616 switch (internalFormat) {
2617 case GL_R11F_G11F_B10F_EXT:
2618 return GL_RGB;
2619 default:
2620 ; /* fallthrough */
2621 }
2622 }
2623
2624 if (ctx->Extensions.ARB_depth_buffer_float) {
2625 switch (internalFormat) {
2626 case GL_DEPTH_COMPONENT32F:
2627 return GL_DEPTH_COMPONENT;
2628 case GL_DEPTH32F_STENCIL8:
2629 return GL_DEPTH_STENCIL;
2630 default:
2631 ; /* fallthrough */
2632 }
2633 }
2634
2635 return -1; /* error */
2636 }
2637
2638 /**
2639 * Returns the effective internal format from a texture format and type.
2640 * This is used by texture image operations internally for validation, when
2641 * the specified internal format is a base (unsized) format.
2642 *
2643 * This method will only return a valid effective internal format if the
2644 * combination of format, type and internal format in base form, is acceptable.
2645 *
2646 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2647 * in extensions, to unambiguously correspond to the given base format, then
2648 * that internal format is returned as the effective. Otherwise, if the
2649 * combination is accepted but a single effective format is not defined, the
2650 * passed base format will be returned instead.
2651 *
2652 * \param format the texture format
2653 * \param type the texture type
2654 */
2655 static GLenum
2656 gles_effective_internal_format_for_format_and_type(GLenum format,
2657 GLenum type)
2658 {
2659 switch (type) {
2660 case GL_UNSIGNED_BYTE:
2661 switch (format) {
2662 case GL_RGBA:
2663 return GL_RGBA8;
2664 case GL_RGB:
2665 return GL_RGB8;
2666 case GL_RG:
2667 return GL_RG8;
2668 case GL_RED:
2669 return GL_R8;
2670 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2671 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2672 * internal formats, they do not correspond to GL constants, so the base
2673 * format is returned instead.
2674 */
2675 case GL_BGRA_EXT:
2676 case GL_LUMINANCE_ALPHA:
2677 case GL_LUMINANCE:
2678 case GL_ALPHA:
2679 return format;
2680 }
2681 break;
2682
2683 case GL_UNSIGNED_SHORT_4_4_4_4:
2684 if (format == GL_RGBA)
2685 return GL_RGBA4;
2686 break;
2687
2688 case GL_UNSIGNED_SHORT_5_5_5_1:
2689 if (format == GL_RGBA)
2690 return GL_RGB5_A1;
2691 break;
2692
2693 case GL_UNSIGNED_SHORT_5_6_5:
2694 if (format == GL_RGB)
2695 return GL_RGB565;
2696 break;
2697
2698 /* OES_packed_depth_stencil */
2699 case GL_UNSIGNED_INT_24_8:
2700 if (format == GL_DEPTH_STENCIL)
2701 return GL_DEPTH24_STENCIL8;
2702 break;
2703
2704 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2705 if (format == GL_DEPTH_STENCIL)
2706 return GL_DEPTH32F_STENCIL8;
2707 break;
2708
2709 case GL_UNSIGNED_SHORT:
2710 if (format == GL_DEPTH_COMPONENT)
2711 return GL_DEPTH_COMPONENT16;
2712 break;
2713
2714 case GL_UNSIGNED_INT:
2715 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2716 * the format.
2717 */
2718 if (format == GL_DEPTH_COMPONENT)
2719 return format;
2720 break;
2721
2722 /* OES_texture_float and OES_texture_half_float */
2723 case GL_FLOAT:
2724 if (format == GL_DEPTH_COMPONENT)
2725 return GL_DEPTH_COMPONENT32F;
2726 /* fall through */
2727 case GL_HALF_FLOAT_OES:
2728 switch (format) {
2729 case GL_RGBA:
2730 case GL_RGB:
2731 case GL_LUMINANCE_ALPHA:
2732 case GL_LUMINANCE:
2733 case GL_ALPHA:
2734 case GL_RED:
2735 case GL_RG:
2736 return format;
2737 }
2738 break;
2739 case GL_HALF_FLOAT:
2740 switch (format) {
2741 case GL_RG:
2742 case GL_RED:
2743 return format;
2744 }
2745 break;
2746
2747 /* GL_EXT_texture_type_2_10_10_10_REV */
2748 case GL_UNSIGNED_INT_2_10_10_10_REV:
2749 switch (format) {
2750 case GL_RGBA:
2751 case GL_RGB:
2752 return format;
2753 }
2754 break;
2755
2756 default:
2757 /* fall through and return NONE */
2758 break;
2759 }
2760
2761 return GL_NONE;
2762 }
2763
2764 /**
2765 * Do error checking of format/type combinations for OpenGL ES 3
2766 * glTex[Sub]Image, or ES1/ES2 with GL_OES_required_internalformat.
2767 * \return error code, or GL_NO_ERROR.
2768 */
2769 GLenum
2770 _mesa_gles_error_check_format_and_type(const struct gl_context *ctx,
2771 GLenum format, GLenum type,
2772 GLenum internalFormat)
2773 {
2774 /* If internalFormat is an unsized format, then the effective internal
2775 * format derived from format and type should be used instead. Page 127,
2776 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2777 *
2778 * "if internalformat is a base internal format, the effective
2779 * internal format is a sized internal format that is derived
2780 * from the format and type for internal use by the GL.
2781 * Table 3.12 specifies the mapping of format and type to effective
2782 * internal formats. The effective internal format is used by the GL
2783 * for purposes such as texture completeness or type checks for
2784 * CopyTex* commands. In these cases, the GL is required to operate
2785 * as if the effective internal format was used as the internalformat
2786 * when specifying the texture data."
2787 */
2788 if (_mesa_is_enum_format_unsized(internalFormat)) {
2789 GLenum effectiveInternalFormat =
2790 gles_effective_internal_format_for_format_and_type(format, type);
2791
2792 if (effectiveInternalFormat == GL_NONE)
2793 return GL_INVALID_OPERATION;
2794
2795 GLenum baseInternalFormat;
2796 if (internalFormat == GL_BGRA_EXT) {
2797 /* Unfortunately, _mesa_base_tex_format returns a base format of
2798 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2799 * asking the question, "what channels does this format have?"
2800 * However, if we're trying to determine if two internal formats
2801 * match in the ES3 sense, we actually want GL_BGRA.
2802 */
2803 baseInternalFormat = GL_BGRA_EXT;
2804 } else {
2805 baseInternalFormat =
2806 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2807 }
2808
2809 if (internalFormat != baseInternalFormat)
2810 return GL_INVALID_OPERATION;
2811
2812 internalFormat = effectiveInternalFormat;
2813 }
2814
2815 /* The GLES variant of EXT_texture_compression_s3tc is very vague and
2816 * doesn't list valid types. Just do exactly what the spec says.
2817 */
2818 if (ctx->Extensions.EXT_texture_compression_s3tc &&
2819 (internalFormat == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||
2820 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ||
2821 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT3_EXT ||
2822 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT5_EXT))
2823 return format == GL_RGB || format == GL_RGBA ? GL_NO_ERROR :
2824 GL_INVALID_OPERATION;
2825
2826 switch (format) {
2827 case GL_BGRA_EXT:
2828 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2829 return GL_INVALID_OPERATION;
2830 break;
2831
2832 case GL_RGBA:
2833 switch (type) {
2834 case GL_UNSIGNED_BYTE:
2835 switch (internalFormat) {
2836 case GL_RGBA:
2837 case GL_RGBA8:
2838 case GL_RGB5_A1:
2839 case GL_RGBA4:
2840 break;
2841 case GL_SRGB8_ALPHA8_EXT:
2842 if (ctx->Version <= 20)
2843 return GL_INVALID_OPERATION;
2844 break;
2845 default:
2846 return GL_INVALID_OPERATION;
2847 }
2848 break;
2849
2850 case GL_BYTE:
2851 if (ctx->Version <= 20 || internalFormat != GL_RGBA8_SNORM)
2852 return GL_INVALID_OPERATION;
2853 break;
2854
2855 case GL_UNSIGNED_SHORT:
2856 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGBA16)
2857 return GL_INVALID_OPERATION;
2858 break;
2859
2860 case GL_SHORT:
2861 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2862 internalFormat != GL_RGBA16_SNORM)
2863 return GL_INVALID_OPERATION;
2864 break;
2865
2866 case GL_UNSIGNED_SHORT_4_4_4_4:
2867 switch (internalFormat) {
2868 case GL_RGBA:
2869 case GL_RGBA4:
2870 break;
2871 default:
2872 return GL_INVALID_OPERATION;
2873 }
2874 break;
2875
2876 case GL_UNSIGNED_SHORT_5_5_5_1:
2877 switch (internalFormat) {
2878 case GL_RGBA:
2879 case GL_RGB5_A1:
2880 break;
2881 default:
2882 return GL_INVALID_OPERATION;
2883 }
2884 break;
2885
2886 case GL_UNSIGNED_INT_2_10_10_10_REV:
2887 switch (internalFormat) {
2888 case GL_RGBA:
2889 case GL_RGB10_A2:
2890 case GL_RGB5_A1:
2891 if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
2892 return GL_INVALID_OPERATION;
2893 break;
2894 default:
2895 return GL_INVALID_OPERATION;
2896 }
2897 break;
2898
2899 case GL_HALF_FLOAT:
2900 if (ctx->Version <= 20 || internalFormat != GL_RGBA16F)
2901 return GL_INVALID_OPERATION;
2902 break;
2903
2904 case GL_FLOAT:
2905 switch (internalFormat) {
2906 case GL_RGBA16F:
2907 case GL_RGBA32F:
2908 if (ctx->Version <= 20)
2909 return GL_INVALID_OPERATION;
2910 break;
2911 case GL_RGBA:
2912 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2913 break;
2914 default:
2915 return GL_INVALID_OPERATION;
2916 }
2917 break;
2918
2919 case GL_HALF_FLOAT_OES:
2920 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2921 break;
2922 default:
2923 return GL_INVALID_OPERATION;
2924 }
2925 break;
2926
2927 case GL_RGBA_INTEGER:
2928 if (ctx->Version <= 20)
2929 return GL_INVALID_OPERATION;
2930 switch (type) {
2931 case GL_UNSIGNED_BYTE:
2932 if (internalFormat != GL_RGBA8UI)
2933 return GL_INVALID_OPERATION;
2934 break;
2935
2936 case GL_BYTE:
2937 if (internalFormat != GL_RGBA8I)
2938 return GL_INVALID_OPERATION;
2939 break;
2940
2941 case GL_UNSIGNED_SHORT:
2942 if (internalFormat != GL_RGBA16UI)
2943 return GL_INVALID_OPERATION;
2944 break;
2945
2946 case GL_SHORT:
2947 if (internalFormat != GL_RGBA16I)
2948 return GL_INVALID_OPERATION;
2949 break;
2950
2951 case GL_UNSIGNED_INT:
2952 if (internalFormat != GL_RGBA32UI)
2953 return GL_INVALID_OPERATION;
2954 break;
2955
2956 case GL_INT:
2957 if (internalFormat != GL_RGBA32I)
2958 return GL_INVALID_OPERATION;
2959 break;
2960
2961 case GL_UNSIGNED_INT_2_10_10_10_REV:
2962 if (internalFormat != GL_RGB10_A2UI)
2963 return GL_INVALID_OPERATION;
2964 break;
2965
2966 default:
2967 return GL_INVALID_OPERATION;
2968 }
2969 break;
2970
2971 case GL_RGB:
2972 switch (type) {
2973 case GL_UNSIGNED_BYTE:
2974 switch (internalFormat) {
2975 case GL_RGB:
2976 case GL_RGB8:
2977 case GL_RGB565:
2978 break;
2979 case GL_SRGB8:
2980 if (ctx->Version <= 20)
2981 return GL_INVALID_OPERATION;
2982 break;
2983 default:
2984 return GL_INVALID_OPERATION;
2985 }
2986 break;
2987
2988 case GL_BYTE:
2989 if (ctx->Version <= 20 || internalFormat != GL_RGB8_SNORM)
2990 return GL_INVALID_OPERATION;
2991 break;
2992
2993 case GL_UNSIGNED_SHORT:
2994 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGB16)
2995 return GL_INVALID_OPERATION;
2996 break;
2997
2998 case GL_SHORT:
2999 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3000 internalFormat != GL_RGB16_SNORM)
3001 return GL_INVALID_OPERATION;
3002 break;
3003
3004 case GL_UNSIGNED_SHORT_5_6_5:
3005 switch (internalFormat) {
3006 case GL_RGB:
3007 case GL_RGB565:
3008 break;
3009 default:
3010 return GL_INVALID_OPERATION;
3011 }
3012 break;
3013
3014 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3015 if (ctx->Version <= 20 || internalFormat != GL_R11F_G11F_B10F)
3016 return GL_INVALID_OPERATION;
3017 break;
3018
3019 case GL_UNSIGNED_INT_5_9_9_9_REV:
3020 if (ctx->Version <= 20 || internalFormat != GL_RGB9_E5)
3021 return GL_INVALID_OPERATION;
3022 break;
3023
3024 case GL_HALF_FLOAT:
3025 if (ctx->Version <= 20)
3026 return GL_INVALID_OPERATION;
3027 switch (internalFormat) {
3028 case GL_RGB16F:
3029 case GL_R11F_G11F_B10F:
3030 case GL_RGB9_E5:
3031 break;
3032 default:
3033 return GL_INVALID_OPERATION;
3034 }
3035 break;
3036
3037 case GL_FLOAT:
3038 switch (internalFormat) {
3039 case GL_RGB16F:
3040 case GL_RGB32F:
3041 case GL_R11F_G11F_B10F:
3042 case GL_RGB9_E5:
3043 if (ctx->Version <= 20)
3044 return GL_INVALID_OPERATION;
3045 break;
3046 case GL_RGB:
3047 if (ctx->Extensions.OES_texture_float && internalFormat == format)
3048 break;
3049 default:
3050 return GL_INVALID_OPERATION;
3051 }
3052 break;
3053
3054 case GL_HALF_FLOAT_OES:
3055 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3056 return GL_INVALID_OPERATION;
3057 break;
3058
3059 case GL_UNSIGNED_INT_2_10_10_10_REV:
3060 switch (internalFormat) {
3061 case GL_RGB:
3062 case GL_RGB10:
3063 case GL_RGB8:
3064 case GL_RGB565:
3065 /* GL_EXT_texture_type_2_10_10_10_REV allows GL_RGB even though
3066 * GLES3 doesn't, and GL_OES_required_internalformat extends that
3067 * to allow the sized RGB internalformats as well.
3068 */
3069 if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
3070 return GL_INVALID_OPERATION;
3071 break;
3072 default:
3073 return GL_INVALID_OPERATION;
3074 }
3075 break;
3076
3077 default:
3078 return GL_INVALID_OPERATION;
3079 }
3080 break;
3081
3082 case GL_RGB_INTEGER:
3083 if (ctx->Version <= 20)
3084 return GL_INVALID_OPERATION;
3085 switch (type) {
3086 case GL_UNSIGNED_BYTE:
3087 if (internalFormat != GL_RGB8UI)
3088 return GL_INVALID_OPERATION;
3089 break;
3090
3091 case GL_BYTE:
3092 if (internalFormat != GL_RGB8I)
3093 return GL_INVALID_OPERATION;
3094 break;
3095
3096 case GL_UNSIGNED_SHORT:
3097 if (internalFormat != GL_RGB16UI)
3098 return GL_INVALID_OPERATION;
3099 break;
3100
3101 case GL_SHORT:
3102 if (internalFormat != GL_RGB16I)
3103 return GL_INVALID_OPERATION;
3104 break;
3105
3106 case GL_UNSIGNED_INT:
3107 if (internalFormat != GL_RGB32UI)
3108 return GL_INVALID_OPERATION;
3109 break;
3110
3111 case GL_INT:
3112 if (internalFormat != GL_RGB32I)
3113 return GL_INVALID_OPERATION;
3114 break;
3115
3116 default:
3117 return GL_INVALID_OPERATION;
3118 }
3119 break;
3120
3121 case GL_RG:
3122 if (!ctx->Extensions.ARB_texture_rg)
3123 return GL_INVALID_OPERATION;
3124 switch (type) {
3125 case GL_UNSIGNED_BYTE:
3126 if (internalFormat != GL_RG8)
3127 return GL_INVALID_OPERATION;
3128 break;
3129
3130 case GL_BYTE:
3131 if (internalFormat != GL_RG8_SNORM)
3132 return GL_INVALID_OPERATION;
3133 break;
3134
3135 case GL_UNSIGNED_SHORT:
3136 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RG16)
3137 return GL_INVALID_OPERATION;
3138 break;
3139
3140 case GL_SHORT:
3141 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3142 internalFormat != GL_RG16_SNORM)
3143 return GL_INVALID_OPERATION;
3144 break;
3145
3146 case GL_HALF_FLOAT:
3147 case GL_HALF_FLOAT_OES:
3148 switch (internalFormat) {
3149 case GL_RG16F:
3150 if (ctx->Version <= 20)
3151 return GL_INVALID_OPERATION;
3152 break;
3153 case GL_RG:
3154 if (ctx->Extensions.ARB_texture_rg &&
3155 ctx->Extensions.OES_texture_half_float)
3156 break;
3157 /* fallthrough */
3158 default:
3159 return GL_INVALID_OPERATION;
3160 }
3161 break;
3162
3163 case GL_FLOAT:
3164 switch (internalFormat) {
3165 case GL_RG16F:
3166 case GL_RG32F:
3167 break;
3168 case GL_RG:
3169 if (ctx->Extensions.ARB_texture_rg &&
3170 ctx->Extensions.OES_texture_float)
3171 break;
3172 /* fallthrough */
3173 default:
3174 return GL_INVALID_OPERATION;
3175 }
3176 break;
3177
3178 default:
3179 return GL_INVALID_OPERATION;
3180 }
3181 break;
3182
3183 case GL_RG_INTEGER:
3184 if (ctx->Version <= 20)
3185 return GL_INVALID_OPERATION;
3186 switch (type) {
3187 case GL_UNSIGNED_BYTE:
3188 if (internalFormat != GL_RG8UI)
3189 return GL_INVALID_OPERATION;
3190 break;
3191
3192 case GL_BYTE:
3193 if (internalFormat != GL_RG8I)
3194 return GL_INVALID_OPERATION;
3195 break;
3196
3197 case GL_UNSIGNED_SHORT:
3198 if (internalFormat != GL_RG16UI)
3199 return GL_INVALID_OPERATION;
3200 break;
3201
3202 case GL_SHORT:
3203 if (internalFormat != GL_RG16I)
3204 return GL_INVALID_OPERATION;
3205 break;
3206
3207 case GL_UNSIGNED_INT:
3208 if (internalFormat != GL_RG32UI)
3209 return GL_INVALID_OPERATION;
3210 break;
3211
3212 case GL_INT:
3213 if (internalFormat != GL_RG32I)
3214 return GL_INVALID_OPERATION;
3215 break;
3216
3217 default:
3218 return GL_INVALID_OPERATION;
3219 }
3220 break;
3221
3222 case GL_RED:
3223 if (!ctx->Extensions.ARB_texture_rg)
3224 return GL_INVALID_OPERATION;
3225 switch (type) {
3226 case GL_UNSIGNED_BYTE:
3227 if (internalFormat == GL_R8 ||
3228 ((internalFormat == GL_SR8_EXT) &&
3229 ctx->Extensions.EXT_texture_sRGB_R8))
3230 break;
3231 return GL_INVALID_OPERATION;
3232
3233 case GL_BYTE:
3234 if (internalFormat != GL_R8_SNORM)
3235 return GL_INVALID_OPERATION;
3236 break;
3237
3238 case GL_UNSIGNED_SHORT:
3239 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_R16)
3240 return GL_INVALID_OPERATION;
3241 break;
3242
3243 case GL_SHORT:
3244 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3245 internalFormat != GL_R16_SNORM)
3246 return GL_INVALID_OPERATION;
3247 break;
3248
3249 case GL_HALF_FLOAT:
3250 case GL_HALF_FLOAT_OES:
3251 switch (internalFormat) {
3252 case GL_R16F:
3253 if (ctx->Version <= 20)
3254 return GL_INVALID_OPERATION;
3255 break;
3256 case GL_RG:
3257 case GL_RED:
3258 if (ctx->Extensions.ARB_texture_rg &&
3259 ctx->Extensions.OES_texture_half_float)
3260 break;
3261 /* fallthrough */
3262 default:
3263 return GL_INVALID_OPERATION;
3264 }
3265 break;
3266
3267 case GL_FLOAT:
3268 switch (internalFormat) {
3269 case GL_R16F:
3270 case GL_R32F:
3271 break;
3272 case GL_RED:
3273 if (ctx->Extensions.ARB_texture_rg &&
3274 ctx->Extensions.OES_texture_float)
3275 break;
3276 /* fallthrough */
3277 default:
3278 return GL_INVALID_OPERATION;
3279 }
3280 break;
3281
3282 default:
3283 return GL_INVALID_OPERATION;
3284 }
3285 break;
3286
3287 case GL_RED_INTEGER:
3288 if (ctx->Version <= 20)
3289 return GL_INVALID_OPERATION;
3290 switch (type) {
3291 case GL_UNSIGNED_BYTE:
3292 if (internalFormat != GL_R8UI)
3293 return GL_INVALID_OPERATION;
3294 break;
3295
3296 case GL_BYTE:
3297 if (internalFormat != GL_R8I)
3298 return GL_INVALID_OPERATION;
3299 break;
3300
3301 case GL_UNSIGNED_SHORT:
3302 if (internalFormat != GL_R16UI)
3303 return GL_INVALID_OPERATION;
3304 break;
3305
3306 case GL_SHORT:
3307 if (internalFormat != GL_R16I)
3308 return GL_INVALID_OPERATION;
3309 break;
3310
3311 case GL_UNSIGNED_INT:
3312 if (internalFormat != GL_R32UI)
3313 return GL_INVALID_OPERATION;
3314 break;
3315
3316 case GL_INT:
3317 if (internalFormat != GL_R32I)
3318 return GL_INVALID_OPERATION;
3319 break;
3320
3321 default:
3322 return GL_INVALID_OPERATION;
3323 }
3324 break;
3325
3326 case GL_DEPTH_COMPONENT:
3327 switch (type) {
3328 case GL_UNSIGNED_SHORT:
3329 if (internalFormat != GL_DEPTH_COMPONENT
3330 && internalFormat != GL_DEPTH_COMPONENT16)
3331 return GL_INVALID_OPERATION;
3332 break;
3333
3334 case GL_UNSIGNED_INT:
3335 switch (internalFormat) {
3336 case GL_DEPTH_COMPONENT:
3337 case GL_DEPTH_COMPONENT16:
3338 case GL_DEPTH_COMPONENT24:
3339 break;
3340 default:
3341 return GL_INVALID_OPERATION;
3342 }
3343 break;
3344
3345 case GL_FLOAT:
3346 if (ctx->Version <= 20 || internalFormat != GL_DEPTH_COMPONENT32F)
3347 return GL_INVALID_OPERATION;
3348 break;
3349
3350 default:
3351 return GL_INVALID_OPERATION;
3352 }
3353 break;
3354
3355 case GL_DEPTH_STENCIL:
3356 switch (type) {
3357 case GL_UNSIGNED_INT_24_8:
3358 if (internalFormat != GL_DEPTH_STENCIL
3359 && internalFormat != GL_DEPTH24_STENCIL8)
3360 return GL_INVALID_OPERATION;
3361 break;
3362
3363 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3364 if (ctx->Version <= 20 || internalFormat != GL_DEPTH32F_STENCIL8)
3365 return GL_INVALID_OPERATION;
3366 break;
3367
3368 default:
3369 return GL_INVALID_OPERATION;
3370 }
3371 break;
3372
3373 case GL_STENCIL_INDEX:
3374 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3375 type != GL_UNSIGNED_BYTE ||
3376 internalFormat != GL_STENCIL_INDEX8) {
3377 return GL_INVALID_OPERATION;
3378 }
3379 break;
3380
3381 case GL_ALPHA:
3382 case GL_LUMINANCE:
3383 case GL_LUMINANCE_ALPHA:
3384 switch (type) {
3385 case GL_FLOAT:
3386 if (!ctx->Extensions.OES_texture_float || internalFormat != format)
3387 return GL_INVALID_OPERATION;
3388 break;
3389 case GL_HALF_FLOAT_OES:
3390 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3391 return GL_INVALID_OPERATION;
3392 break;
3393 case GL_UNSIGNED_BYTE:
3394 if (!(format == internalFormat ||
3395 (format == GL_ALPHA && internalFormat == GL_ALPHA8) ||
3396 (format == GL_LUMINANCE && internalFormat == GL_LUMINANCE8) ||
3397 (format == GL_LUMINANCE_ALPHA &&
3398 ((internalFormat == GL_LUMINANCE8_ALPHA8) ||
3399 (internalFormat == GL_LUMINANCE4_ALPHA4))))) {
3400 return GL_INVALID_OPERATION;
3401 }
3402 break;
3403 default:
3404 return GL_INVALID_OPERATION;
3405 }
3406 break;
3407 }
3408
3409 return GL_NO_ERROR;
3410 }
3411
3412 static void
3413 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3414 {
3415 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3416 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3417 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3418 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3419 }
3420
3421 static bool
3422 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3423 {
3424 switch (format) {
3425 case GL_RGBA:
3426 case GL_RGBA_INTEGER_EXT:
3427 set_swizzle(swizzle, 0, 1, 2, 3);
3428 return true;
3429 case GL_BGRA:
3430 case GL_BGRA_INTEGER_EXT:
3431 set_swizzle(swizzle, 2, 1, 0, 3);
3432 return true;
3433 case GL_ABGR_EXT:
3434 set_swizzle(swizzle, 3, 2, 1, 0);
3435 return true;
3436 case GL_RGB:
3437 case GL_RGB_INTEGER_EXT:
3438 set_swizzle(swizzle, 0, 1, 2, 5);
3439 return true;
3440 case GL_BGR:
3441 case GL_BGR_INTEGER_EXT:
3442 set_swizzle(swizzle, 2, 1, 0, 5);
3443 return true;
3444 case GL_LUMINANCE_ALPHA:
3445 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3446 set_swizzle(swizzle, 0, 0, 0, 1);
3447 return true;
3448 case GL_RG:
3449 case GL_RG_INTEGER:
3450 set_swizzle(swizzle, 0, 1, 4, 5);
3451 return true;
3452 case GL_RED:
3453 case GL_RED_INTEGER_EXT:
3454 set_swizzle(swizzle, 0, 4, 4, 5);
3455 return true;
3456 case GL_GREEN:
3457 case GL_GREEN_INTEGER_EXT:
3458 set_swizzle(swizzle, 4, 0, 4, 5);
3459 return true;
3460 case GL_BLUE:
3461 case GL_BLUE_INTEGER_EXT:
3462 set_swizzle(swizzle, 4, 4, 0, 5);
3463 return true;
3464 case GL_ALPHA:
3465 case GL_ALPHA_INTEGER_EXT:
3466 set_swizzle(swizzle, 4, 4, 4, 0);
3467 return true;
3468 case GL_LUMINANCE:
3469 case GL_LUMINANCE_INTEGER_EXT:
3470 set_swizzle(swizzle, 0, 0, 0, 5);
3471 return true;
3472 case GL_INTENSITY:
3473 set_swizzle(swizzle, 0, 0, 0, 0);
3474 return true;
3475 default:
3476 return false;
3477 }
3478 }
3479
3480 /**
3481 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3482 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3483 * otherwise (for non-array formats).
3484 *
3485 * This function will typically be used to compute a mesa format from a GL type
3486 * so we can then call _mesa_format_convert. This function does
3487 * not consider byte swapping, so it returns types assuming that no byte
3488 * swapping is involved. If byte swapping is involved then clients are supposed
3489 * to handle that on their side before calling _mesa_format_convert.
3490 *
3491 * This function returns an uint32_t that can pack a mesa_format or a
3492 * mesa_array_format. Clients must check the mesa array format bit
3493 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3494 * format is a mesa_array_format or a mesa_format.
3495 */
3496 uint32_t
3497 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3498 {
3499 bool is_array_format = true;
3500 uint8_t swizzle[4];
3501 bool normalized = false, is_float = false, is_signed = false;
3502 int num_channels = 0, type_size = 0;
3503
3504 /* Extract array format type information from the OpenGL data type */
3505 switch (type) {
3506 case GL_UNSIGNED_BYTE:
3507 type_size = 1;
3508 break;
3509 case GL_BYTE:
3510 type_size = 1;
3511 is_signed = true;
3512 break;
3513 case GL_UNSIGNED_SHORT:
3514 type_size = 2;
3515 break;
3516 case GL_SHORT:
3517 type_size = 2;
3518 is_signed = true;
3519 break;
3520 case GL_UNSIGNED_INT:
3521 type_size = 4;
3522 break;
3523 case GL_INT:
3524 type_size = 4;
3525 is_signed = true;
3526 break;
3527 case GL_HALF_FLOAT:
3528 case GL_HALF_FLOAT_OES:
3529 type_size = 2;
3530 is_signed = true;
3531 is_float = true;
3532 break;
3533 case GL_FLOAT:
3534 type_size = 4;
3535 is_signed = true;
3536 is_float = true;
3537 break;
3538 default:
3539 is_array_format = false;
3540 break;
3541 }
3542
3543 /* Extract array format swizzle information from the OpenGL format */
3544 if (is_array_format)
3545 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3546
3547 /* If this is an array format type after checking data type and format,
3548 * create the array format
3549 */
3550 if (is_array_format) {
3551 normalized = !_mesa_is_enum_format_integer(format);
3552 num_channels = _mesa_components_in_format(format);
3553
3554 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
3555 normalized, num_channels,
3556 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3557 }
3558
3559 /* Otherwise this is not an array format, so return the mesa_format
3560 * matching the OpenGL format and data type
3561 */
3562 switch (type) {
3563 case GL_UNSIGNED_SHORT_5_6_5:
3564 if (format == GL_RGB)
3565 return MESA_FORMAT_B5G6R5_UNORM;
3566 else if (format == GL_BGR)
3567 return MESA_FORMAT_R5G6B5_UNORM;
3568 else if (format == GL_RGB_INTEGER)
3569 return MESA_FORMAT_B5G6R5_UINT;
3570 break;
3571 case GL_UNSIGNED_SHORT_5_6_5_REV:
3572 if (format == GL_RGB)
3573 return MESA_FORMAT_R5G6B5_UNORM;
3574 else if (format == GL_BGR)
3575 return MESA_FORMAT_B5G6R5_UNORM;
3576 else if (format == GL_RGB_INTEGER)
3577 return MESA_FORMAT_R5G6B5_UINT;
3578 break;
3579 case GL_UNSIGNED_SHORT_4_4_4_4:
3580 if (format == GL_RGBA)
3581 return MESA_FORMAT_A4B4G4R4_UNORM;
3582 else if (format == GL_BGRA)
3583 return MESA_FORMAT_A4R4G4B4_UNORM;
3584 else if (format == GL_ABGR_EXT)
3585 return MESA_FORMAT_R4G4B4A4_UNORM;
3586 else if (format == GL_RGBA_INTEGER)
3587 return MESA_FORMAT_A4B4G4R4_UINT;
3588 else if (format == GL_BGRA_INTEGER)
3589 return MESA_FORMAT_A4R4G4B4_UINT;
3590 break;
3591 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3592 if (format == GL_RGBA)
3593 return MESA_FORMAT_R4G4B4A4_UNORM;
3594 else if (format == GL_BGRA)
3595 return MESA_FORMAT_B4G4R4A4_UNORM;
3596 else if (format == GL_ABGR_EXT)
3597 return MESA_FORMAT_A4B4G4R4_UNORM;
3598 else if (format == GL_RGBA_INTEGER)
3599 return MESA_FORMAT_R4G4B4A4_UINT;
3600 else if (format == GL_BGRA_INTEGER)
3601 return MESA_FORMAT_B4G4R4A4_UINT;
3602 break;
3603 case GL_UNSIGNED_SHORT_5_5_5_1:
3604 if (format == GL_RGBA)
3605 return MESA_FORMAT_A1B5G5R5_UNORM;
3606 else if (format == GL_BGRA)
3607 return MESA_FORMAT_A1R5G5B5_UNORM;
3608 else if (format == GL_RGBA_INTEGER)
3609 return MESA_FORMAT_A1B5G5R5_UINT;
3610 else if (format == GL_BGRA_INTEGER)
3611 return MESA_FORMAT_A1R5G5B5_UINT;
3612 break;
3613 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3614 if (format == GL_RGBA)
3615 return MESA_FORMAT_R5G5B5A1_UNORM;
3616 else if (format == GL_BGRA)
3617 return MESA_FORMAT_B5G5R5A1_UNORM;
3618 else if (format == GL_RGBA_INTEGER)
3619 return MESA_FORMAT_R5G5B5A1_UINT;
3620 else if (format == GL_BGRA_INTEGER)
3621 return MESA_FORMAT_B5G5R5A1_UINT;
3622 break;
3623 case GL_UNSIGNED_BYTE_3_3_2:
3624 if (format == GL_RGB)
3625 return MESA_FORMAT_B2G3R3_UNORM;
3626 else if (format == GL_RGB_INTEGER)
3627 return MESA_FORMAT_B2G3R3_UINT;
3628 break;
3629 case GL_UNSIGNED_BYTE_2_3_3_REV:
3630 if (format == GL_RGB)
3631 return MESA_FORMAT_R3G3B2_UNORM;
3632 else if (format == GL_RGB_INTEGER)
3633 return MESA_FORMAT_R3G3B2_UINT;
3634 break;
3635 case GL_UNSIGNED_INT_5_9_9_9_REV:
3636 if (format == GL_RGB)
3637 return MESA_FORMAT_R9G9B9E5_FLOAT;
3638 break;
3639 case GL_UNSIGNED_INT_10_10_10_2:
3640 if (format == GL_RGBA)
3641 return MESA_FORMAT_A2B10G10R10_UNORM;
3642 else if (format == GL_RGBA_INTEGER)
3643 return MESA_FORMAT_A2B10G10R10_UINT;
3644 else if (format == GL_BGRA)
3645 return MESA_FORMAT_A2R10G10B10_UNORM;
3646 else if (format == GL_BGRA_INTEGER)
3647 return MESA_FORMAT_A2R10G10B10_UINT;
3648 break;
3649 case GL_UNSIGNED_INT_2_10_10_10_REV:
3650 if (format == GL_RGB)
3651 return MESA_FORMAT_R10G10B10X2_UNORM;
3652 if (format == GL_RGBA)
3653 return MESA_FORMAT_R10G10B10A2_UNORM;
3654 else if (format == GL_RGBA_INTEGER)
3655 return MESA_FORMAT_R10G10B10A2_UINT;
3656 else if (format == GL_BGRA)
3657 return MESA_FORMAT_B10G10R10A2_UNORM;
3658 else if (format == GL_BGRA_INTEGER)
3659 return MESA_FORMAT_B10G10R10A2_UINT;
3660 break;
3661 case GL_UNSIGNED_INT_8_8_8_8:
3662 if (format == GL_RGBA)
3663 return MESA_FORMAT_A8B8G8R8_UNORM;
3664 else if (format == GL_BGRA)
3665 return MESA_FORMAT_A8R8G8B8_UNORM;
3666 else if (format == GL_ABGR_EXT)
3667 return MESA_FORMAT_R8G8B8A8_UNORM;
3668 else if (format == GL_RGBA_INTEGER)
3669 return MESA_FORMAT_A8B8G8R8_UINT;
3670 else if (format == GL_BGRA_INTEGER)
3671 return MESA_FORMAT_A8R8G8B8_UINT;
3672 break;
3673 case GL_UNSIGNED_INT_8_8_8_8_REV:
3674 if (format == GL_RGBA)
3675 return MESA_FORMAT_R8G8B8A8_UNORM;
3676 else if (format == GL_BGRA)
3677 return MESA_FORMAT_B8G8R8A8_UNORM;
3678 else if (format == GL_ABGR_EXT)
3679 return MESA_FORMAT_A8B8G8R8_UNORM;
3680 else if (format == GL_RGBA_INTEGER)
3681 return MESA_FORMAT_R8G8B8A8_UINT;
3682 else if (format == GL_BGRA_INTEGER)
3683 return MESA_FORMAT_B8G8R8A8_UINT;
3684 break;
3685 case GL_UNSIGNED_SHORT_8_8_MESA:
3686 if (format == GL_YCBCR_MESA)
3687 return MESA_FORMAT_YCBCR;
3688 break;
3689 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3690 if (format == GL_YCBCR_MESA)
3691 return MESA_FORMAT_YCBCR_REV;
3692 break;
3693 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3694 if (format == GL_RGB)
3695 return MESA_FORMAT_R11G11B10_FLOAT;
3696 break;
3697 case GL_FLOAT:
3698 if (format == GL_DEPTH_COMPONENT)
3699 return MESA_FORMAT_Z_FLOAT32;
3700 break;
3701 case GL_UNSIGNED_INT:
3702 if (format == GL_DEPTH_COMPONENT)
3703 return MESA_FORMAT_Z_UNORM32;
3704 break;
3705 case GL_UNSIGNED_SHORT:
3706 if (format == GL_DEPTH_COMPONENT)
3707 return MESA_FORMAT_Z_UNORM16;
3708 break;
3709 case GL_UNSIGNED_INT_24_8:
3710 if (format == GL_DEPTH_STENCIL)
3711 return MESA_FORMAT_Z24_UNORM_S8_UINT;
3712 break;
3713 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3714 if (format == GL_DEPTH_STENCIL)
3715 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3716 break;
3717 default:
3718 break;
3719 }
3720
3721 /* If we got here it means that we could not find a Mesa format that
3722 * matches the GL format/type provided. We may need to add a new Mesa
3723 * format in that case.
3724 */
3725 unreachable("Unsupported format");
3726 }
3727
3728 uint32_t
3729 _mesa_tex_format_from_format_and_type(const struct gl_context *ctx,
3730 GLenum gl_format, GLenum type)
3731 {
3732 mesa_format format = _mesa_format_from_format_and_type(gl_format, type);
3733
3734 if (_mesa_format_is_mesa_array_format(format))
3735 format = _mesa_format_from_array_format(format);
3736
3737 if (format == MESA_FORMAT_NONE || !ctx->TextureFormatSupported[format])
3738 return MESA_FORMAT_NONE;
3739
3740 return format;
3741 }
3742
3743 /**
3744 * Returns true if \p internal_format is a sized internal format that
3745 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
3746 */
3747 bool
3748 _mesa_is_es3_color_renderable(const struct gl_context *ctx,
3749 GLenum internal_format)
3750 {
3751 switch (internal_format) {
3752 case GL_R8:
3753 case GL_RG8:
3754 case GL_RGB8:
3755 case GL_RGB565:
3756 case GL_RGBA4:
3757 case GL_RGB5_A1:
3758 case GL_RGBA8:
3759 case GL_RGB10_A2:
3760 case GL_RGB10_A2UI:
3761 case GL_SRGB8_ALPHA8:
3762 case GL_R16F:
3763 case GL_RG16F:
3764 case GL_RGBA16F:
3765 case GL_R32F:
3766 case GL_RG32F:
3767 case GL_RGBA32F:
3768 case GL_R11F_G11F_B10F:
3769 case GL_R8I:
3770 case GL_R8UI:
3771 case GL_R16I:
3772 case GL_R16UI:
3773 case GL_R32I:
3774 case GL_R32UI:
3775 case GL_RG8I:
3776 case GL_RG8UI:
3777 case GL_RG16I:
3778 case GL_RG16UI:
3779 case GL_RG32I:
3780 case GL_RG32UI:
3781 case GL_RGBA8I:
3782 case GL_RGBA8UI:
3783 case GL_RGBA16I:
3784 case GL_RGBA16UI:
3785 case GL_RGBA32I:
3786 case GL_RGBA32UI:
3787 return true;
3788 case GL_R16:
3789 case GL_RG16:
3790 case GL_RGBA16:
3791 return _mesa_has_EXT_texture_norm16(ctx);
3792 case GL_R8_SNORM:
3793 case GL_RG8_SNORM:
3794 case GL_RGBA8_SNORM:
3795 return _mesa_has_EXT_render_snorm(ctx);
3796 case GL_R16_SNORM:
3797 case GL_RG16_SNORM:
3798 case GL_RGBA16_SNORM:
3799 return _mesa_has_EXT_texture_norm16(ctx) &&
3800 _mesa_has_EXT_render_snorm(ctx);
3801 default:
3802 return false;
3803 }
3804 }
3805
3806 /**
3807 * Returns true if \p internal_format is a sized internal format that
3808 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
3809 */
3810 bool
3811 _mesa_is_es3_texture_filterable(const struct gl_context *ctx,
3812 GLenum internal_format)
3813 {
3814 switch (internal_format) {
3815 case GL_R8:
3816 case GL_R8_SNORM:
3817 case GL_RG8:
3818 case GL_RG8_SNORM:
3819 case GL_RGB8:
3820 case GL_RGB8_SNORM:
3821 case GL_RGB565:
3822 case GL_RGBA4:
3823 case GL_RGB5_A1:
3824 case GL_RGBA8:
3825 case GL_RGBA8_SNORM:
3826 case GL_RGB10_A2:
3827 case GL_SRGB8:
3828 case GL_SRGB8_ALPHA8:
3829 case GL_R16F:
3830 case GL_RG16F:
3831 case GL_RGB16F:
3832 case GL_RGBA16F:
3833 case GL_R11F_G11F_B10F:
3834 case GL_RGB9_E5:
3835 return true;
3836 case GL_R16:
3837 case GL_R16_SNORM:
3838 case GL_RG16:
3839 case GL_RG16_SNORM:
3840 case GL_RGB16:
3841 case GL_RGB16_SNORM:
3842 case GL_RGBA16:
3843 case GL_RGBA16_SNORM:
3844 return _mesa_has_EXT_texture_norm16(ctx);
3845 case GL_R32F:
3846 case GL_RG32F:
3847 case GL_RGB32F:
3848 case GL_RGBA32F:
3849 /* The OES_texture_float_linear spec says:
3850 *
3851 * "When implemented against OpenGL ES 3.0 or later versions, sized
3852 * 32-bit floating-point formats become texture-filterable. This
3853 * should be noted by, for example, checking the ``TF'' column of
3854 * table 8.13 in the ES 3.1 Specification (``Correspondence of sized
3855 * internal formats to base internal formats ... and use cases ...'')
3856 * for the R32F, RG32F, RGB32F, and RGBA32F formats."
3857 */
3858 return ctx->Extensions.OES_texture_float_linear;
3859 default:
3860 return false;
3861 }
3862 }