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mesa/main: clean up S3_s3tc check
[mesa.git] / src / mesa / main / glformats.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008-2009 VMware, Inc.
6 * Copyright (c) 2012 Intel Corporation
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28 #include "context.h"
29 #include "glformats.h"
30 #include "formats.h"
31 #include "texcompress.h"
32 #include "enums.h"
33
34 enum {
35 ZERO = 4,
36 ONE = 5
37 };
38
39 enum {
40 IDX_LUMINANCE = 0,
41 IDX_ALPHA,
42 IDX_INTENSITY,
43 IDX_LUMINANCE_ALPHA,
44 IDX_RGB,
45 IDX_RGBA,
46 IDX_RED,
47 IDX_GREEN,
48 IDX_BLUE,
49 IDX_BGR,
50 IDX_BGRA,
51 IDX_ABGR,
52 IDX_RG,
53 MAX_IDX
54 };
55
56 #define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
57 #define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
58 #define MAP3(x,y,z) MAP4(x, y, z, ZERO)
59 #define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
60
61 static const struct {
62 GLubyte format_idx;
63 GLubyte to_rgba[6];
64 GLubyte from_rgba[6];
65 } mappings[MAX_IDX] =
66 {
67 {
68 IDX_LUMINANCE,
69 MAP4(0,0,0,ONE),
70 MAP1(0)
71 },
72
73 {
74 IDX_ALPHA,
75 MAP4(ZERO, ZERO, ZERO, 0),
76 MAP1(3)
77 },
78
79 {
80 IDX_INTENSITY,
81 MAP4(0, 0, 0, 0),
82 MAP1(0),
83 },
84
85 {
86 IDX_LUMINANCE_ALPHA,
87 MAP4(0,0,0,1),
88 MAP2(0,3)
89 },
90
91 {
92 IDX_RGB,
93 MAP4(0,1,2,ONE),
94 MAP3(0,1,2)
95 },
96
97 {
98 IDX_RGBA,
99 MAP4(0,1,2,3),
100 MAP4(0,1,2,3),
101 },
102
103 {
104 IDX_RED,
105 MAP4(0, ZERO, ZERO, ONE),
106 MAP1(0),
107 },
108
109 {
110 IDX_GREEN,
111 MAP4(ZERO, 0, ZERO, ONE),
112 MAP1(1),
113 },
114
115 {
116 IDX_BLUE,
117 MAP4(ZERO, ZERO, 0, ONE),
118 MAP1(2),
119 },
120
121 {
122 IDX_BGR,
123 MAP4(2,1,0,ONE),
124 MAP3(2,1,0)
125 },
126
127 {
128 IDX_BGRA,
129 MAP4(2,1,0,3),
130 MAP4(2,1,0,3)
131 },
132
133 {
134 IDX_ABGR,
135 MAP4(3,2,1,0),
136 MAP4(3,2,1,0)
137 },
138
139 {
140 IDX_RG,
141 MAP4(0, 1, ZERO, ONE),
142 MAP2(0, 1)
143 },
144 };
145
146 /**
147 * Convert a GL image format enum to an IDX_* value (see above).
148 */
149 static int
150 get_map_idx(GLenum value)
151 {
152 switch (value) {
153 case GL_LUMINANCE:
154 case GL_LUMINANCE_INTEGER_EXT:
155 return IDX_LUMINANCE;
156 case GL_ALPHA:
157 case GL_ALPHA_INTEGER:
158 return IDX_ALPHA;
159 case GL_INTENSITY:
160 return IDX_INTENSITY;
161 case GL_LUMINANCE_ALPHA:
162 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
163 return IDX_LUMINANCE_ALPHA;
164 case GL_RGB:
165 case GL_RGB_INTEGER:
166 return IDX_RGB;
167 case GL_RGBA:
168 case GL_RGBA_INTEGER:
169 return IDX_RGBA;
170 case GL_RED:
171 case GL_RED_INTEGER:
172 return IDX_RED;
173 case GL_GREEN:
174 return IDX_GREEN;
175 case GL_BLUE:
176 return IDX_BLUE;
177 case GL_BGR:
178 case GL_BGR_INTEGER:
179 return IDX_BGR;
180 case GL_BGRA:
181 case GL_BGRA_INTEGER:
182 return IDX_BGRA;
183 case GL_ABGR_EXT:
184 return IDX_ABGR;
185 case GL_RG:
186 case GL_RG_INTEGER:
187 return IDX_RG;
188 default:
189 _mesa_problem(NULL, "Unexpected inFormat %s",
190 _mesa_enum_to_string(value));
191 return 0;
192 }
193 }
194
195 /**
196 * When promoting texture formats (see below) we need to compute the
197 * mapping of dest components back to source components.
198 * This function does that.
199 * \param inFormat the incoming format of the texture
200 * \param outFormat the final texture format
201 * \return map[6] a full 6-component map
202 */
203 void
204 _mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
205 {
206 const int inFmt = get_map_idx(inFormat);
207 const int outFmt = get_map_idx(outFormat);
208 const GLubyte *in2rgba = mappings[inFmt].to_rgba;
209 const GLubyte *rgba2out = mappings[outFmt].from_rgba;
210 int i;
211
212 for (i = 0; i < 4; i++)
213 map[i] = in2rgba[rgba2out[i]];
214
215 map[ZERO] = ZERO;
216 map[ONE] = ONE;
217
218 #if 0
219 printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
220 inFormat, _mesa_enum_to_string(inFormat),
221 outFormat, _mesa_enum_to_string(outFormat),
222 map[0],
223 map[1],
224 map[2],
225 map[3],
226 map[4],
227 map[5]);
228 #endif
229 }
230
231 /**
232 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
233 */
234 GLboolean
235 _mesa_type_is_packed(GLenum type)
236 {
237 switch (type) {
238 case GL_UNSIGNED_BYTE_3_3_2:
239 case GL_UNSIGNED_BYTE_2_3_3_REV:
240 case MESA_UNSIGNED_BYTE_4_4:
241 case GL_UNSIGNED_SHORT_5_6_5:
242 case GL_UNSIGNED_SHORT_5_6_5_REV:
243 case GL_UNSIGNED_SHORT_4_4_4_4:
244 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
245 case GL_UNSIGNED_SHORT_5_5_5_1:
246 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
247 case GL_UNSIGNED_INT_8_8_8_8:
248 case GL_UNSIGNED_INT_8_8_8_8_REV:
249 case GL_UNSIGNED_INT_10_10_10_2:
250 case GL_UNSIGNED_INT_2_10_10_10_REV:
251 case GL_UNSIGNED_SHORT_8_8_MESA:
252 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
253 case GL_UNSIGNED_INT_24_8_EXT:
254 case GL_UNSIGNED_INT_5_9_9_9_REV:
255 case GL_UNSIGNED_INT_10F_11F_11F_REV:
256 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
257 return GL_TRUE;
258 }
259
260 return GL_FALSE;
261 }
262
263
264 /**
265 * Get the size of a GL data type.
266 *
267 * \param type GL data type.
268 *
269 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
270 * if an invalid type enum.
271 */
272 GLint
273 _mesa_sizeof_type(GLenum type)
274 {
275 switch (type) {
276 case GL_BITMAP:
277 return 0;
278 case GL_UNSIGNED_BYTE:
279 return sizeof(GLubyte);
280 case GL_BYTE:
281 return sizeof(GLbyte);
282 case GL_UNSIGNED_SHORT:
283 return sizeof(GLushort);
284 case GL_SHORT:
285 return sizeof(GLshort);
286 case GL_UNSIGNED_INT:
287 return sizeof(GLuint);
288 case GL_INT:
289 return sizeof(GLint);
290 case GL_FLOAT:
291 return sizeof(GLfloat);
292 case GL_DOUBLE:
293 return sizeof(GLdouble);
294 case GL_HALF_FLOAT_ARB:
295 case GL_HALF_FLOAT_OES:
296 return sizeof(GLhalfARB);
297 case GL_FIXED:
298 return sizeof(GLfixed);
299 default:
300 return -1;
301 }
302 }
303
304
305 /**
306 * Same as _mesa_sizeof_type() but also accepting the packed pixel
307 * format data types.
308 */
309 GLint
310 _mesa_sizeof_packed_type(GLenum type)
311 {
312 switch (type) {
313 case GL_BITMAP:
314 return 0;
315 case GL_UNSIGNED_BYTE:
316 return sizeof(GLubyte);
317 case GL_BYTE:
318 return sizeof(GLbyte);
319 case GL_UNSIGNED_SHORT:
320 return sizeof(GLushort);
321 case GL_SHORT:
322 return sizeof(GLshort);
323 case GL_UNSIGNED_INT:
324 return sizeof(GLuint);
325 case GL_INT:
326 return sizeof(GLint);
327 case GL_HALF_FLOAT_ARB:
328 case GL_HALF_FLOAT_OES:
329 return sizeof(GLhalfARB);
330 case GL_FLOAT:
331 return sizeof(GLfloat);
332 case GL_UNSIGNED_BYTE_3_3_2:
333 case GL_UNSIGNED_BYTE_2_3_3_REV:
334 case MESA_UNSIGNED_BYTE_4_4:
335 return sizeof(GLubyte);
336 case GL_UNSIGNED_SHORT_5_6_5:
337 case GL_UNSIGNED_SHORT_5_6_5_REV:
338 case GL_UNSIGNED_SHORT_4_4_4_4:
339 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
340 case GL_UNSIGNED_SHORT_5_5_5_1:
341 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
342 case GL_UNSIGNED_SHORT_8_8_MESA:
343 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
344 return sizeof(GLushort);
345 case GL_UNSIGNED_INT_8_8_8_8:
346 case GL_UNSIGNED_INT_8_8_8_8_REV:
347 case GL_UNSIGNED_INT_10_10_10_2:
348 case GL_UNSIGNED_INT_2_10_10_10_REV:
349 case GL_UNSIGNED_INT_24_8_EXT:
350 case GL_UNSIGNED_INT_5_9_9_9_REV:
351 case GL_UNSIGNED_INT_10F_11F_11F_REV:
352 return sizeof(GLuint);
353 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
354 return 8;
355 default:
356 return -1;
357 }
358 }
359
360
361 /**
362 * Get the number of components in a pixel format.
363 *
364 * \param format pixel format.
365 *
366 * \return the number of components in the given format, or -1 if a bad format.
367 */
368 GLint
369 _mesa_components_in_format(GLenum format)
370 {
371 switch (format) {
372 case GL_COLOR_INDEX:
373 case GL_STENCIL_INDEX:
374 case GL_DEPTH_COMPONENT:
375 case GL_RED:
376 case GL_RED_INTEGER_EXT:
377 case GL_GREEN:
378 case GL_GREEN_INTEGER_EXT:
379 case GL_BLUE:
380 case GL_BLUE_INTEGER_EXT:
381 case GL_ALPHA:
382 case GL_ALPHA_INTEGER_EXT:
383 case GL_LUMINANCE:
384 case GL_LUMINANCE_INTEGER_EXT:
385 case GL_INTENSITY:
386 return 1;
387
388 case GL_LUMINANCE_ALPHA:
389 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
390 case GL_RG:
391 case GL_YCBCR_MESA:
392 case GL_DEPTH_STENCIL_EXT:
393 case GL_RG_INTEGER:
394 return 2;
395
396 case GL_RGB:
397 case GL_BGR:
398 case GL_RGB_INTEGER_EXT:
399 case GL_BGR_INTEGER_EXT:
400 return 3;
401
402 case GL_RGBA:
403 case GL_BGRA:
404 case GL_ABGR_EXT:
405 case GL_RGBA_INTEGER_EXT:
406 case GL_BGRA_INTEGER_EXT:
407 return 4;
408
409 default:
410 return -1;
411 }
412 }
413
414
415 /**
416 * Get the bytes per pixel of pixel format type pair.
417 *
418 * \param format pixel format.
419 * \param type pixel type.
420 *
421 * \return bytes per pixel, or -1 if a bad format or type was given.
422 */
423 GLint
424 _mesa_bytes_per_pixel(GLenum format, GLenum type)
425 {
426 GLint comps = _mesa_components_in_format(format);
427 if (comps < 0)
428 return -1;
429
430 switch (type) {
431 case GL_BITMAP:
432 return 0; /* special case */
433 case GL_BYTE:
434 case GL_UNSIGNED_BYTE:
435 return comps * sizeof(GLubyte);
436 case GL_SHORT:
437 case GL_UNSIGNED_SHORT:
438 return comps * sizeof(GLshort);
439 case GL_INT:
440 case GL_UNSIGNED_INT:
441 return comps * sizeof(GLint);
442 case GL_FLOAT:
443 return comps * sizeof(GLfloat);
444 case GL_HALF_FLOAT_ARB:
445 case GL_HALF_FLOAT_OES:
446 return comps * sizeof(GLhalfARB);
447 case GL_UNSIGNED_BYTE_3_3_2:
448 case GL_UNSIGNED_BYTE_2_3_3_REV:
449 if (format == GL_RGB || format == GL_BGR ||
450 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
451 return sizeof(GLubyte);
452 else
453 return -1; /* error */
454 case GL_UNSIGNED_SHORT_5_6_5:
455 case GL_UNSIGNED_SHORT_5_6_5_REV:
456 if (format == GL_RGB || format == GL_BGR ||
457 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
458 return sizeof(GLushort);
459 else
460 return -1; /* error */
461 case GL_UNSIGNED_SHORT_4_4_4_4:
462 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
463 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
464 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
465 return sizeof(GLushort);
466 else
467 return -1;
468 case GL_UNSIGNED_SHORT_5_5_5_1:
469 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
470 if (format == GL_RGBA || format == GL_BGRA ||
471 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
472 return sizeof(GLushort);
473 else
474 return -1;
475 case GL_UNSIGNED_INT_8_8_8_8:
476 case GL_UNSIGNED_INT_8_8_8_8_REV:
477 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
478 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
479 format == GL_RGB)
480 return sizeof(GLuint);
481 else
482 return -1;
483 case GL_UNSIGNED_INT_10_10_10_2:
484 case GL_UNSIGNED_INT_2_10_10_10_REV:
485 if (format == GL_RGBA || format == GL_BGRA ||
486 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
487 format == GL_RGB)
488 return sizeof(GLuint);
489 else
490 return -1;
491 case GL_UNSIGNED_SHORT_8_8_MESA:
492 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
493 if (format == GL_YCBCR_MESA)
494 return sizeof(GLushort);
495 else
496 return -1;
497 case GL_UNSIGNED_INT_24_8_EXT:
498 if (format == GL_DEPTH_COMPONENT ||
499 format == GL_DEPTH_STENCIL_EXT)
500 return sizeof(GLuint);
501 else
502 return -1;
503 case GL_UNSIGNED_INT_5_9_9_9_REV:
504 if (format == GL_RGB)
505 return sizeof(GLuint);
506 else
507 return -1;
508 case GL_UNSIGNED_INT_10F_11F_11F_REV:
509 if (format == GL_RGB)
510 return sizeof(GLuint);
511 else
512 return -1;
513 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
514 if (format == GL_DEPTH_STENCIL)
515 return 8;
516 else
517 return -1;
518 default:
519 return -1;
520 }
521 }
522
523
524 /**
525 * Get the number of bytes for a vertex attrib with the given number of
526 * components and type.
527 *
528 * \param comps number of components.
529 * \param type data type.
530 *
531 * \return bytes per attribute, or -1 if a bad comps/type combination was given.
532 */
533 GLint
534 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
535 {
536 switch (type) {
537 case GL_BYTE:
538 case GL_UNSIGNED_BYTE:
539 return comps * sizeof(GLubyte);
540 case GL_SHORT:
541 case GL_UNSIGNED_SHORT:
542 return comps * sizeof(GLshort);
543 case GL_INT:
544 case GL_UNSIGNED_INT:
545 return comps * sizeof(GLint);
546 case GL_FLOAT:
547 return comps * sizeof(GLfloat);
548 case GL_HALF_FLOAT_ARB:
549 case GL_HALF_FLOAT_OES:
550 return comps * sizeof(GLhalfARB);
551 case GL_DOUBLE:
552 return comps * sizeof(GLdouble);
553 case GL_FIXED:
554 return comps * sizeof(GLfixed);
555 case GL_INT_2_10_10_10_REV:
556 case GL_UNSIGNED_INT_2_10_10_10_REV:
557 if (comps == 4)
558 return sizeof(GLuint);
559 else
560 return -1;
561 case GL_UNSIGNED_INT_10F_11F_11F_REV:
562 if (comps == 3)
563 return sizeof(GLuint);
564 else
565 return -1;
566 case GL_UNSIGNED_INT64_ARB:
567 return comps * 8;
568 default:
569 return -1;
570 }
571 }
572
573 /**
574 * Test if the given format is unsized.
575 */
576 GLboolean
577 _mesa_is_enum_format_unsized(GLenum format)
578 {
579 switch (format) {
580 case GL_RGBA:
581 case GL_BGRA:
582 case GL_ABGR_EXT:
583 case GL_RGB:
584 case GL_BGR:
585 case GL_RG:
586 case GL_RED:
587 case GL_GREEN:
588 case GL_BLUE:
589 case GL_ALPHA:
590 case GL_INTENSITY:
591 case GL_LUMINANCE:
592 case GL_LUMINANCE_ALPHA:
593
594 case GL_SRGB:
595 case GL_SRGB_ALPHA:
596 case GL_SLUMINANCE:
597 case GL_SLUMINANCE_ALPHA:
598
599 case GL_RGBA_SNORM:
600 case GL_RGB_SNORM:
601 case GL_RG_SNORM:
602 case GL_RED_SNORM:
603 case GL_ALPHA_SNORM:
604 case GL_INTENSITY_SNORM:
605 case GL_LUMINANCE_SNORM:
606 case GL_LUMINANCE_ALPHA_SNORM:
607
608 case GL_RED_INTEGER:
609 case GL_GREEN_INTEGER:
610 case GL_BLUE_INTEGER:
611 case GL_ALPHA_INTEGER:
612 case GL_RGB_INTEGER:
613 case GL_RGBA_INTEGER:
614 case GL_BGR_INTEGER:
615 case GL_BGRA_INTEGER:
616 case GL_RG_INTEGER:
617 case GL_LUMINANCE_INTEGER_EXT:
618 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
619
620 case GL_DEPTH_COMPONENT:
621 case GL_DEPTH_STENCIL:
622 case GL_STENCIL_INDEX:
623 return GL_TRUE;
624 default:
625 return GL_FALSE;
626 }
627 }
628
629 /**
630 * Test if the given format is a UNORM (unsigned-normalized) format.
631 */
632 GLboolean
633 _mesa_is_enum_format_unorm(GLenum format)
634 {
635 switch(format) {
636 case GL_RED:
637 case GL_GREEN:
638 case GL_BLUE:
639 case GL_ALPHA:
640 case GL_ALPHA4:
641 case GL_ALPHA8:
642 case GL_ALPHA12:
643 case GL_ALPHA16:
644 case 1:
645 case GL_LUMINANCE:
646 case GL_SLUMINANCE:
647 case GL_LUMINANCE4:
648 case GL_LUMINANCE8:
649 case GL_LUMINANCE12:
650 case GL_LUMINANCE16:
651 case 2:
652 case GL_LUMINANCE_ALPHA:
653 case GL_SLUMINANCE_ALPHA:
654 case GL_LUMINANCE4_ALPHA4:
655 case GL_LUMINANCE6_ALPHA2:
656 case GL_LUMINANCE8_ALPHA8:
657 case GL_LUMINANCE12_ALPHA4:
658 case GL_LUMINANCE12_ALPHA12:
659 case GL_LUMINANCE16_ALPHA16:
660 case GL_INTENSITY:
661 case GL_INTENSITY4:
662 case GL_INTENSITY8:
663 case GL_INTENSITY12:
664 case GL_INTENSITY16:
665 case GL_R8:
666 case GL_R16:
667 case GL_RG:
668 case GL_RG8:
669 case GL_RG16:
670 case 3:
671 case GL_RGB:
672 case GL_BGR:
673 case GL_SRGB:
674 case GL_R3_G3_B2:
675 case GL_RGB4:
676 case GL_RGB5:
677 case GL_RGB565:
678 case GL_RGB8:
679 case GL_RGB10:
680 case GL_RGB12:
681 case GL_RGB16:
682 case 4:
683 case GL_ABGR_EXT:
684 case GL_RGBA:
685 case GL_BGRA:
686 case GL_SRGB_ALPHA:
687 case GL_RGBA2:
688 case GL_RGBA4:
689 case GL_RGB5_A1:
690 case GL_RGBA8:
691 case GL_RGB10_A2:
692 case GL_RGBA12:
693 case GL_RGBA16:
694 return GL_TRUE;
695 default:
696 return GL_FALSE;
697 }
698 }
699
700 /**
701 * Test if the given format is a SNORM (signed-normalized) format.
702 */
703 GLboolean
704 _mesa_is_enum_format_snorm(GLenum format)
705 {
706 switch (format) {
707 /* signed, normalized texture formats */
708 case GL_RED_SNORM:
709 case GL_R8_SNORM:
710 case GL_R16_SNORM:
711 case GL_RG_SNORM:
712 case GL_RG8_SNORM:
713 case GL_RG16_SNORM:
714 case GL_RGB_SNORM:
715 case GL_RGB8_SNORM:
716 case GL_RGB16_SNORM:
717 case GL_RGBA_SNORM:
718 case GL_RGBA8_SNORM:
719 case GL_RGBA16_SNORM:
720 case GL_ALPHA_SNORM:
721 case GL_ALPHA8_SNORM:
722 case GL_ALPHA16_SNORM:
723 case GL_LUMINANCE_SNORM:
724 case GL_LUMINANCE8_SNORM:
725 case GL_LUMINANCE16_SNORM:
726 case GL_LUMINANCE_ALPHA_SNORM:
727 case GL_LUMINANCE8_ALPHA8_SNORM:
728 case GL_LUMINANCE16_ALPHA16_SNORM:
729 case GL_INTENSITY_SNORM:
730 case GL_INTENSITY8_SNORM:
731 case GL_INTENSITY16_SNORM:
732 return GL_TRUE;
733 default:
734 return GL_FALSE;
735 }
736 }
737
738 /**
739 * Test if the given format is an integer (non-normalized) format.
740 */
741 GLboolean
742 _mesa_is_enum_format_unsigned_int(GLenum format)
743 {
744 switch (format) {
745 /* specific integer formats */
746 case GL_RGBA32UI_EXT:
747 case GL_RGB32UI_EXT:
748 case GL_RG32UI:
749 case GL_R32UI:
750 case GL_ALPHA32UI_EXT:
751 case GL_INTENSITY32UI_EXT:
752 case GL_LUMINANCE32UI_EXT:
753 case GL_LUMINANCE_ALPHA32UI_EXT:
754 case GL_RGBA16UI_EXT:
755 case GL_RGB16UI_EXT:
756 case GL_RG16UI:
757 case GL_R16UI:
758 case GL_ALPHA16UI_EXT:
759 case GL_INTENSITY16UI_EXT:
760 case GL_LUMINANCE16UI_EXT:
761 case GL_LUMINANCE_ALPHA16UI_EXT:
762 case GL_RGBA8UI_EXT:
763 case GL_RGB8UI_EXT:
764 case GL_RG8UI:
765 case GL_R8UI:
766 case GL_ALPHA8UI_EXT:
767 case GL_INTENSITY8UI_EXT:
768 case GL_LUMINANCE8UI_EXT:
769 case GL_LUMINANCE_ALPHA8UI_EXT:
770 case GL_RGB10_A2UI:
771 return GL_TRUE;
772 default:
773 return GL_FALSE;
774 }
775 }
776
777
778 /**
779 * Test if the given format is an integer (non-normalized) format.
780 */
781 GLboolean
782 _mesa_is_enum_format_signed_int(GLenum format)
783 {
784 switch (format) {
785 /* generic integer formats */
786 case GL_RED_INTEGER_EXT:
787 case GL_GREEN_INTEGER_EXT:
788 case GL_BLUE_INTEGER_EXT:
789 case GL_ALPHA_INTEGER_EXT:
790 case GL_RGB_INTEGER_EXT:
791 case GL_RGBA_INTEGER_EXT:
792 case GL_BGR_INTEGER_EXT:
793 case GL_BGRA_INTEGER_EXT:
794 case GL_LUMINANCE_INTEGER_EXT:
795 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
796 case GL_RG_INTEGER:
797 /* specific integer formats */
798 case GL_RGBA32I_EXT:
799 case GL_RGB32I_EXT:
800 case GL_RG32I:
801 case GL_R32I:
802 case GL_ALPHA32I_EXT:
803 case GL_INTENSITY32I_EXT:
804 case GL_LUMINANCE32I_EXT:
805 case GL_LUMINANCE_ALPHA32I_EXT:
806 case GL_RGBA16I_EXT:
807 case GL_RGB16I_EXT:
808 case GL_RG16I:
809 case GL_R16I:
810 case GL_ALPHA16I_EXT:
811 case GL_INTENSITY16I_EXT:
812 case GL_LUMINANCE16I_EXT:
813 case GL_LUMINANCE_ALPHA16I_EXT:
814 case GL_RGBA8I_EXT:
815 case GL_RGB8I_EXT:
816 case GL_RG8I:
817 case GL_R8I:
818 case GL_ALPHA8I_EXT:
819 case GL_INTENSITY8I_EXT:
820 case GL_LUMINANCE8I_EXT:
821 case GL_LUMINANCE_ALPHA8I_EXT:
822 return GL_TRUE;
823 default:
824 return GL_FALSE;
825 }
826 }
827
828 /**
829 * Test if the given format is an ASTC 2D format.
830 */
831 static bool
832 is_astc_2d_format(GLenum internalFormat)
833 {
834 switch (internalFormat) {
835 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
844 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
845 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
846 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
847 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
848 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
858 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
859 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
860 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
861 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
862 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
863 return true;
864 default:
865 return false;
866 }
867 }
868
869 /**
870 * Test if the given format is an ASTC 3D format.
871 */
872 static bool
873 is_astc_3d_format(GLenum internalFormat)
874 {
875 switch (internalFormat) {
876 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
877 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
878 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
879 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
880 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
881 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
882 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
883 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
884 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
885 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
886 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
887 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
888 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
889 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
890 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
891 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
892 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
893 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
894 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
895 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
896 return true;
897 default:
898 return false;
899 }
900 }
901
902 /**
903 * Test if the given format is an ASTC format.
904 */
905 GLboolean
906 _mesa_is_astc_format(GLenum internalFormat)
907 {
908 return is_astc_2d_format(internalFormat) ||
909 is_astc_3d_format(internalFormat);
910 }
911
912 /**
913 * Test if the given format is an ETC2 format.
914 */
915 GLboolean
916 _mesa_is_etc2_format(GLenum internalFormat)
917 {
918 switch (internalFormat) {
919 case GL_COMPRESSED_RGB8_ETC2:
920 case GL_COMPRESSED_SRGB8_ETC2:
921 case GL_COMPRESSED_RGBA8_ETC2_EAC:
922 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
923 case GL_COMPRESSED_R11_EAC:
924 case GL_COMPRESSED_RG11_EAC:
925 case GL_COMPRESSED_SIGNED_R11_EAC:
926 case GL_COMPRESSED_SIGNED_RG11_EAC:
927 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
928 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
929 return true;
930 default:
931 return false;
932 }
933 }
934
935 /**
936 * Test if the given format is an integer (non-normalized) format.
937 */
938 GLboolean
939 _mesa_is_enum_format_integer(GLenum format)
940 {
941 return _mesa_is_enum_format_unsigned_int(format) ||
942 _mesa_is_enum_format_signed_int(format);
943 }
944
945
946 GLboolean
947 _mesa_is_type_unsigned(GLenum type)
948 {
949 switch (type) {
950 case GL_UNSIGNED_INT:
951 case GL_UNSIGNED_INT_8_8_8_8:
952 case GL_UNSIGNED_INT_8_8_8_8_REV:
953 case GL_UNSIGNED_INT_10_10_10_2:
954 case GL_UNSIGNED_INT_2_10_10_10_REV:
955
956 case GL_UNSIGNED_SHORT:
957 case GL_UNSIGNED_SHORT_4_4_4_4:
958 case GL_UNSIGNED_SHORT_5_5_5_1:
959 case GL_UNSIGNED_SHORT_5_6_5:
960 case GL_UNSIGNED_SHORT_5_6_5_REV:
961 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
962 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
963 case GL_UNSIGNED_SHORT_8_8_MESA:
964 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
965
966 case GL_UNSIGNED_BYTE:
967 case GL_UNSIGNED_BYTE_3_3_2:
968 case GL_UNSIGNED_BYTE_2_3_3_REV:
969 return GL_TRUE;
970
971 default:
972 return GL_FALSE;
973 }
974 }
975
976
977 /**
978 * Test if the given image format is a color/RGBA format (i.e., not color
979 * index, depth, stencil, etc).
980 * \param format the image format value (may by an internal texture format)
981 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
982 */
983 GLboolean
984 _mesa_is_color_format(GLenum format)
985 {
986 switch (format) {
987 case GL_RED:
988 case GL_GREEN:
989 case GL_BLUE:
990 case GL_ALPHA:
991 case GL_ALPHA4:
992 case GL_ALPHA8:
993 case GL_ALPHA12:
994 case GL_ALPHA16:
995 case 1:
996 case GL_LUMINANCE:
997 case GL_LUMINANCE4:
998 case GL_LUMINANCE8:
999 case GL_LUMINANCE12:
1000 case GL_LUMINANCE16:
1001 case 2:
1002 case GL_LUMINANCE_ALPHA:
1003 case GL_LUMINANCE4_ALPHA4:
1004 case GL_LUMINANCE6_ALPHA2:
1005 case GL_LUMINANCE8_ALPHA8:
1006 case GL_LUMINANCE12_ALPHA4:
1007 case GL_LUMINANCE12_ALPHA12:
1008 case GL_LUMINANCE16_ALPHA16:
1009 case GL_INTENSITY:
1010 case GL_INTENSITY4:
1011 case GL_INTENSITY8:
1012 case GL_INTENSITY12:
1013 case GL_INTENSITY16:
1014 case GL_R8:
1015 case GL_R16:
1016 case GL_RG:
1017 case GL_RG8:
1018 case GL_RG16:
1019 case 3:
1020 case GL_RGB:
1021 case GL_BGR:
1022 case GL_R3_G3_B2:
1023 case GL_RGB4:
1024 case GL_RGB5:
1025 case GL_RGB565:
1026 case GL_RGB8:
1027 case GL_RGB10:
1028 case GL_RGB12:
1029 case GL_RGB16:
1030 case 4:
1031 case GL_ABGR_EXT:
1032 case GL_RGBA:
1033 case GL_BGRA:
1034 case GL_RGBA2:
1035 case GL_RGBA4:
1036 case GL_RGB5_A1:
1037 case GL_RGBA8:
1038 case GL_RGB10_A2:
1039 case GL_RGBA12:
1040 case GL_RGBA16:
1041 /* float texture formats */
1042 case GL_ALPHA16F_ARB:
1043 case GL_ALPHA32F_ARB:
1044 case GL_LUMINANCE16F_ARB:
1045 case GL_LUMINANCE32F_ARB:
1046 case GL_LUMINANCE_ALPHA16F_ARB:
1047 case GL_LUMINANCE_ALPHA32F_ARB:
1048 case GL_INTENSITY16F_ARB:
1049 case GL_INTENSITY32F_ARB:
1050 case GL_R16F:
1051 case GL_R32F:
1052 case GL_RG16F:
1053 case GL_RG32F:
1054 case GL_RGB16F_ARB:
1055 case GL_RGB32F_ARB:
1056 case GL_RGBA16F_ARB:
1057 case GL_RGBA32F_ARB:
1058 /* compressed formats */
1059 case GL_COMPRESSED_ALPHA:
1060 case GL_COMPRESSED_LUMINANCE:
1061 case GL_COMPRESSED_LUMINANCE_ALPHA:
1062 case GL_COMPRESSED_INTENSITY:
1063 case GL_COMPRESSED_RED:
1064 case GL_COMPRESSED_RG:
1065 case GL_COMPRESSED_RGB:
1066 case GL_COMPRESSED_RGBA:
1067 case GL_RGB_S3TC:
1068 case GL_RGB4_S3TC:
1069 case GL_RGBA_S3TC:
1070 case GL_RGBA4_S3TC:
1071 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1072 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1073 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1074 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1075 case GL_COMPRESSED_RGB_FXT1_3DFX:
1076 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1077 case GL_SRGB_EXT:
1078 case GL_SRGB8_EXT:
1079 case GL_SRGB_ALPHA_EXT:
1080 case GL_SRGB8_ALPHA8_EXT:
1081 case GL_SLUMINANCE_ALPHA_EXT:
1082 case GL_SLUMINANCE8_ALPHA8_EXT:
1083 case GL_SLUMINANCE_EXT:
1084 case GL_SLUMINANCE8_EXT:
1085 case GL_COMPRESSED_SRGB_EXT:
1086 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1087 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1088 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1089 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1090 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1091 case GL_COMPRESSED_SLUMINANCE_EXT:
1092 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1093 case GL_COMPRESSED_RED_RGTC1:
1094 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1095 case GL_COMPRESSED_RG_RGTC2:
1096 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1097 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1098 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1099 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1100 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1101 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1102 case GL_ETC1_RGB8_OES:
1103 case GL_COMPRESSED_RGB8_ETC2:
1104 case GL_COMPRESSED_SRGB8_ETC2:
1105 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1106 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1107 case GL_COMPRESSED_R11_EAC:
1108 case GL_COMPRESSED_RG11_EAC:
1109 case GL_COMPRESSED_SIGNED_R11_EAC:
1110 case GL_COMPRESSED_SIGNED_RG11_EAC:
1111 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1112 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1113 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1114 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1115 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1116 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1117 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1118 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1119 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1120 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1121 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1122 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1123 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1124 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1125 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1126 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1127 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1128 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1129 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1130 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1131 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1132 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1133 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1134 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1135 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1136 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1137 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1138 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1139 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1140 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1141 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1142 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1143 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1144 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1145 /* generic integer formats */
1146 case GL_RED_INTEGER_EXT:
1147 case GL_GREEN_INTEGER_EXT:
1148 case GL_BLUE_INTEGER_EXT:
1149 case GL_ALPHA_INTEGER_EXT:
1150 case GL_RGB_INTEGER_EXT:
1151 case GL_RGBA_INTEGER_EXT:
1152 case GL_BGR_INTEGER_EXT:
1153 case GL_BGRA_INTEGER_EXT:
1154 case GL_RG_INTEGER:
1155 case GL_LUMINANCE_INTEGER_EXT:
1156 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1157 /* sized integer formats */
1158 case GL_RGBA32UI_EXT:
1159 case GL_RGB32UI_EXT:
1160 case GL_RG32UI:
1161 case GL_R32UI:
1162 case GL_ALPHA32UI_EXT:
1163 case GL_INTENSITY32UI_EXT:
1164 case GL_LUMINANCE32UI_EXT:
1165 case GL_LUMINANCE_ALPHA32UI_EXT:
1166 case GL_RGBA16UI_EXT:
1167 case GL_RGB16UI_EXT:
1168 case GL_RG16UI:
1169 case GL_R16UI:
1170 case GL_ALPHA16UI_EXT:
1171 case GL_INTENSITY16UI_EXT:
1172 case GL_LUMINANCE16UI_EXT:
1173 case GL_LUMINANCE_ALPHA16UI_EXT:
1174 case GL_RGBA8UI_EXT:
1175 case GL_RGB8UI_EXT:
1176 case GL_RG8UI:
1177 case GL_R8UI:
1178 case GL_ALPHA8UI_EXT:
1179 case GL_INTENSITY8UI_EXT:
1180 case GL_LUMINANCE8UI_EXT:
1181 case GL_LUMINANCE_ALPHA8UI_EXT:
1182 case GL_RGBA32I_EXT:
1183 case GL_RGB32I_EXT:
1184 case GL_RG32I:
1185 case GL_R32I:
1186 case GL_ALPHA32I_EXT:
1187 case GL_INTENSITY32I_EXT:
1188 case GL_LUMINANCE32I_EXT:
1189 case GL_LUMINANCE_ALPHA32I_EXT:
1190 case GL_RGBA16I_EXT:
1191 case GL_RGB16I_EXT:
1192 case GL_RG16I:
1193 case GL_R16I:
1194 case GL_ALPHA16I_EXT:
1195 case GL_INTENSITY16I_EXT:
1196 case GL_LUMINANCE16I_EXT:
1197 case GL_LUMINANCE_ALPHA16I_EXT:
1198 case GL_RGBA8I_EXT:
1199 case GL_RGB8I_EXT:
1200 case GL_RG8I:
1201 case GL_R8I:
1202 case GL_ALPHA8I_EXT:
1203 case GL_INTENSITY8I_EXT:
1204 case GL_LUMINANCE8I_EXT:
1205 case GL_LUMINANCE_ALPHA8I_EXT:
1206 /* signed, normalized texture formats */
1207 case GL_RED_SNORM:
1208 case GL_R8_SNORM:
1209 case GL_R16_SNORM:
1210 case GL_RG_SNORM:
1211 case GL_RG8_SNORM:
1212 case GL_RG16_SNORM:
1213 case GL_RGB_SNORM:
1214 case GL_RGB8_SNORM:
1215 case GL_RGB16_SNORM:
1216 case GL_RGBA_SNORM:
1217 case GL_RGBA8_SNORM:
1218 case GL_RGBA16_SNORM:
1219 case GL_ALPHA_SNORM:
1220 case GL_ALPHA8_SNORM:
1221 case GL_ALPHA16_SNORM:
1222 case GL_LUMINANCE_SNORM:
1223 case GL_LUMINANCE8_SNORM:
1224 case GL_LUMINANCE16_SNORM:
1225 case GL_LUMINANCE_ALPHA_SNORM:
1226 case GL_LUMINANCE8_ALPHA8_SNORM:
1227 case GL_LUMINANCE16_ALPHA16_SNORM:
1228 case GL_INTENSITY_SNORM:
1229 case GL_INTENSITY8_SNORM:
1230 case GL_INTENSITY16_SNORM:
1231 case GL_RGB9_E5:
1232 case GL_R11F_G11F_B10F:
1233 case GL_RGB10_A2UI:
1234 return GL_TRUE;
1235 case GL_YCBCR_MESA: /* not considered to be RGB */
1236 /* fall-through */
1237 default:
1238 return GL_FALSE;
1239 }
1240 }
1241
1242
1243 /**
1244 * Test if the given image format is a depth component format.
1245 */
1246 GLboolean
1247 _mesa_is_depth_format(GLenum format)
1248 {
1249 switch (format) {
1250 case GL_DEPTH_COMPONENT:
1251 case GL_DEPTH_COMPONENT16:
1252 case GL_DEPTH_COMPONENT24:
1253 case GL_DEPTH_COMPONENT32:
1254 case GL_DEPTH_COMPONENT32F:
1255 return GL_TRUE;
1256 default:
1257 return GL_FALSE;
1258 }
1259 }
1260
1261
1262 /**
1263 * Test if the given image format is a stencil format.
1264 */
1265 GLboolean
1266 _mesa_is_stencil_format(GLenum format)
1267 {
1268 switch (format) {
1269 case GL_STENCIL_INDEX:
1270 return GL_TRUE;
1271 default:
1272 return GL_FALSE;
1273 }
1274 }
1275
1276
1277 /**
1278 * Test if the given image format is a YCbCr format.
1279 */
1280 GLboolean
1281 _mesa_is_ycbcr_format(GLenum format)
1282 {
1283 switch (format) {
1284 case GL_YCBCR_MESA:
1285 return GL_TRUE;
1286 default:
1287 return GL_FALSE;
1288 }
1289 }
1290
1291
1292 /**
1293 * Test if the given image format is a depth+stencil format.
1294 */
1295 GLboolean
1296 _mesa_is_depthstencil_format(GLenum format)
1297 {
1298 switch (format) {
1299 case GL_DEPTH24_STENCIL8_EXT:
1300 case GL_DEPTH_STENCIL_EXT:
1301 case GL_DEPTH32F_STENCIL8:
1302 return GL_TRUE;
1303 default:
1304 return GL_FALSE;
1305 }
1306 }
1307
1308
1309 /**
1310 * Test if the given image format is a depth or stencil format.
1311 */
1312 GLboolean
1313 _mesa_is_depth_or_stencil_format(GLenum format)
1314 {
1315 switch (format) {
1316 case GL_DEPTH_COMPONENT:
1317 case GL_DEPTH_COMPONENT16:
1318 case GL_DEPTH_COMPONENT24:
1319 case GL_DEPTH_COMPONENT32:
1320 case GL_STENCIL_INDEX:
1321 case GL_STENCIL_INDEX1_EXT:
1322 case GL_STENCIL_INDEX4_EXT:
1323 case GL_STENCIL_INDEX8_EXT:
1324 case GL_STENCIL_INDEX16_EXT:
1325 case GL_DEPTH_STENCIL_EXT:
1326 case GL_DEPTH24_STENCIL8_EXT:
1327 case GL_DEPTH_COMPONENT32F:
1328 case GL_DEPTH32F_STENCIL8:
1329 return GL_TRUE;
1330 default:
1331 return GL_FALSE;
1332 }
1333 }
1334
1335
1336 /**
1337 * Test if an image format is a supported compressed format.
1338 * \param format the internal format token provided by the user.
1339 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1340 */
1341 GLboolean
1342 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1343 {
1344 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1345
1346 /* Some formats in this switch have an equivalent mesa_format_layout
1347 * to the compressed formats in the layout switch below and thus
1348 * must be handled first.
1349 */
1350 switch (format) {
1351 case GL_RGB_S3TC:
1352 case GL_RGB4_S3TC:
1353 case GL_RGBA_S3TC:
1354 case GL_RGBA4_S3TC:
1355 return _mesa_has_S3_s3tc(ctx);
1356 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1357 return ctx->API == API_OPENGL_COMPAT
1358 && ctx->Extensions.ATI_texture_compression_3dc;
1359 case GL_PALETTE4_RGB8_OES:
1360 case GL_PALETTE4_RGBA8_OES:
1361 case GL_PALETTE4_R5_G6_B5_OES:
1362 case GL_PALETTE4_RGBA4_OES:
1363 case GL_PALETTE4_RGB5_A1_OES:
1364 case GL_PALETTE8_RGB8_OES:
1365 case GL_PALETTE8_RGBA8_OES:
1366 case GL_PALETTE8_R5_G6_B5_OES:
1367 case GL_PALETTE8_RGBA4_OES:
1368 case GL_PALETTE8_RGB5_A1_OES:
1369 return ctx->API == API_OPENGLES;
1370 }
1371
1372 switch (_mesa_get_format_layout(m_format)) {
1373 case MESA_FORMAT_LAYOUT_S3TC:
1374 if (_mesa_get_format_color_encoding(m_format) == GL_LINEAR) {
1375 /* Assume that the ANGLE flag will always be set if the
1376 * EXT flag is set.
1377 */
1378 return ctx->Extensions.ANGLE_texture_compression_dxt;
1379 } else {
1380 return _mesa_has_EXT_texture_sRGB(ctx) &&
1381 _mesa_has_EXT_texture_compression_s3tc(ctx);
1382 }
1383 case MESA_FORMAT_LAYOUT_FXT1:
1384 return _mesa_is_desktop_gl(ctx)
1385 && ctx->Extensions.TDFX_texture_compression_FXT1;
1386 case MESA_FORMAT_LAYOUT_RGTC:
1387 return _mesa_is_desktop_gl(ctx)
1388 && ctx->Extensions.ARB_texture_compression_rgtc;
1389 case MESA_FORMAT_LAYOUT_LATC:
1390 return ctx->API == API_OPENGL_COMPAT
1391 && ctx->Extensions.EXT_texture_compression_latc;
1392 case MESA_FORMAT_LAYOUT_ETC1:
1393 return _mesa_is_gles(ctx)
1394 && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
1395 case MESA_FORMAT_LAYOUT_ETC2:
1396 return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
1397 case MESA_FORMAT_LAYOUT_BPTC:
1398 return _mesa_is_desktop_gl(ctx) &&
1399 ctx->Extensions.ARB_texture_compression_bptc;
1400 case MESA_FORMAT_LAYOUT_ASTC:
1401 return ctx->Extensions.KHR_texture_compression_astc_ldr;
1402 default:
1403 return GL_FALSE;
1404 }
1405 }
1406
1407 /**
1408 * Test if the given format represents an sRGB format.
1409 * \param format the GL format (can be an internal format)
1410 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1411 */
1412 GLboolean
1413 _mesa_is_srgb_format(GLenum format)
1414 {
1415 switch (format) {
1416 case GL_SRGB:
1417 case GL_SRGB8:
1418 case GL_SRGB_ALPHA:
1419 case GL_SRGB8_ALPHA8:
1420 case GL_COMPRESSED_SRGB:
1421 case GL_COMPRESSED_SRGB_ALPHA:
1422 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1423 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1424 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1425 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1426 case GL_COMPRESSED_SRGB8_ETC2:
1427 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1428 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1429 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1430 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1431 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1432 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1433 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1434 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1435 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1436 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1437 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1438 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1439 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1440 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1441 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1442 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1443 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1444 return GL_TRUE;
1445 default:
1446 break;
1447 }
1448
1449 return GL_FALSE;
1450 }
1451
1452 /**
1453 * Convert various unpack formats to the corresponding base format.
1454 */
1455 GLenum
1456 _mesa_unpack_format_to_base_format(GLenum format)
1457 {
1458 switch(format) {
1459 case GL_RED_INTEGER:
1460 return GL_RED;
1461 case GL_GREEN_INTEGER:
1462 return GL_GREEN;
1463 case GL_BLUE_INTEGER:
1464 return GL_BLUE;
1465 case GL_ALPHA_INTEGER:
1466 return GL_ALPHA;
1467 case GL_RG_INTEGER:
1468 return GL_RG;
1469 case GL_RGB_INTEGER:
1470 return GL_RGB;
1471 case GL_RGBA_INTEGER:
1472 return GL_RGBA;
1473 case GL_BGR_INTEGER:
1474 return GL_BGR;
1475 case GL_BGRA_INTEGER:
1476 return GL_BGRA;
1477 case GL_LUMINANCE_INTEGER_EXT:
1478 return GL_LUMINANCE;
1479 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1480 return GL_LUMINANCE_ALPHA;
1481 case GL_RED:
1482 case GL_GREEN:
1483 case GL_BLUE:
1484 case GL_RG:
1485 case GL_RGB:
1486 case GL_RGBA:
1487 case GL_BGR:
1488 case GL_BGRA:
1489 case GL_ALPHA:
1490 case GL_LUMINANCE:
1491 case GL_LUMINANCE_ALPHA:
1492 default:
1493 return format;
1494 }
1495 }
1496
1497 /**
1498 * Convert various base formats to the corresponding integer format.
1499 */
1500 GLenum
1501 _mesa_base_format_to_integer_format(GLenum format)
1502 {
1503 switch(format) {
1504 case GL_RED:
1505 return GL_RED_INTEGER;
1506 case GL_GREEN:
1507 return GL_GREEN_INTEGER;
1508 case GL_BLUE:
1509 return GL_BLUE_INTEGER;
1510 case GL_RG:
1511 return GL_RG_INTEGER;
1512 case GL_RGB:
1513 return GL_RGB_INTEGER;
1514 case GL_RGBA:
1515 return GL_RGBA_INTEGER;
1516 case GL_BGR:
1517 return GL_BGR_INTEGER;
1518 case GL_BGRA:
1519 return GL_BGRA_INTEGER;
1520 case GL_ALPHA:
1521 return GL_ALPHA_INTEGER;
1522 case GL_LUMINANCE:
1523 return GL_LUMINANCE_INTEGER_EXT;
1524 case GL_LUMINANCE_ALPHA:
1525 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1526 }
1527
1528 return format;
1529 }
1530
1531
1532 /**
1533 * Does the given base texture/renderbuffer format have the channel
1534 * named by 'pname'?
1535 */
1536 GLboolean
1537 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1538 {
1539 switch (pname) {
1540 case GL_TEXTURE_RED_SIZE:
1541 case GL_TEXTURE_RED_TYPE:
1542 case GL_RENDERBUFFER_RED_SIZE_EXT:
1543 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1544 case GL_INTERNALFORMAT_RED_SIZE:
1545 case GL_INTERNALFORMAT_RED_TYPE:
1546 if (base_format == GL_RED ||
1547 base_format == GL_RG ||
1548 base_format == GL_RGB ||
1549 base_format == GL_RGBA) {
1550 return GL_TRUE;
1551 }
1552 return GL_FALSE;
1553 case GL_TEXTURE_GREEN_SIZE:
1554 case GL_TEXTURE_GREEN_TYPE:
1555 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1556 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1557 case GL_INTERNALFORMAT_GREEN_SIZE:
1558 case GL_INTERNALFORMAT_GREEN_TYPE:
1559 if (base_format == GL_RG ||
1560 base_format == GL_RGB ||
1561 base_format == GL_RGBA) {
1562 return GL_TRUE;
1563 }
1564 return GL_FALSE;
1565 case GL_TEXTURE_BLUE_SIZE:
1566 case GL_TEXTURE_BLUE_TYPE:
1567 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1568 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1569 case GL_INTERNALFORMAT_BLUE_SIZE:
1570 case GL_INTERNALFORMAT_BLUE_TYPE:
1571 if (base_format == GL_RGB ||
1572 base_format == GL_RGBA) {
1573 return GL_TRUE;
1574 }
1575 return GL_FALSE;
1576 case GL_TEXTURE_ALPHA_SIZE:
1577 case GL_TEXTURE_ALPHA_TYPE:
1578 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1579 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1580 case GL_INTERNALFORMAT_ALPHA_SIZE:
1581 case GL_INTERNALFORMAT_ALPHA_TYPE:
1582 if (base_format == GL_RGBA ||
1583 base_format == GL_ALPHA ||
1584 base_format == GL_LUMINANCE_ALPHA) {
1585 return GL_TRUE;
1586 }
1587 return GL_FALSE;
1588 case GL_TEXTURE_LUMINANCE_SIZE:
1589 case GL_TEXTURE_LUMINANCE_TYPE:
1590 if (base_format == GL_LUMINANCE ||
1591 base_format == GL_LUMINANCE_ALPHA) {
1592 return GL_TRUE;
1593 }
1594 return GL_FALSE;
1595 case GL_TEXTURE_INTENSITY_SIZE:
1596 case GL_TEXTURE_INTENSITY_TYPE:
1597 if (base_format == GL_INTENSITY) {
1598 return GL_TRUE;
1599 }
1600 return GL_FALSE;
1601 case GL_TEXTURE_DEPTH_SIZE:
1602 case GL_TEXTURE_DEPTH_TYPE:
1603 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1604 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1605 case GL_INTERNALFORMAT_DEPTH_SIZE:
1606 case GL_INTERNALFORMAT_DEPTH_TYPE:
1607 if (base_format == GL_DEPTH_STENCIL ||
1608 base_format == GL_DEPTH_COMPONENT) {
1609 return GL_TRUE;
1610 }
1611 return GL_FALSE;
1612 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1613 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1614 case GL_INTERNALFORMAT_STENCIL_SIZE:
1615 case GL_INTERNALFORMAT_STENCIL_TYPE:
1616 if (base_format == GL_DEPTH_STENCIL ||
1617 base_format == GL_STENCIL_INDEX) {
1618 return GL_TRUE;
1619 }
1620 return GL_FALSE;
1621 default:
1622 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1623 __func__, pname);
1624 return GL_FALSE;
1625 }
1626
1627 return GL_FALSE;
1628 }
1629
1630
1631 /**
1632 * If format is a generic compressed format, return the corresponding
1633 * non-compressed format. For other formats, return the format as-is.
1634 */
1635 GLenum
1636 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1637 {
1638 switch (format) {
1639 case GL_COMPRESSED_RED:
1640 return GL_RED;
1641 case GL_COMPRESSED_RG:
1642 return GL_RG;
1643 case GL_COMPRESSED_RGB:
1644 return GL_RGB;
1645 case GL_COMPRESSED_RGBA:
1646 return GL_RGBA;
1647 case GL_COMPRESSED_ALPHA:
1648 return GL_ALPHA;
1649 case GL_COMPRESSED_LUMINANCE:
1650 return GL_LUMINANCE;
1651 case GL_COMPRESSED_LUMINANCE_ALPHA:
1652 return GL_LUMINANCE_ALPHA;
1653 case GL_COMPRESSED_INTENSITY:
1654 return GL_INTENSITY;
1655 /* sRGB formats */
1656 case GL_COMPRESSED_SRGB:
1657 return GL_SRGB;
1658 case GL_COMPRESSED_SRGB_ALPHA:
1659 return GL_SRGB_ALPHA;
1660 case GL_COMPRESSED_SLUMINANCE:
1661 return GL_SLUMINANCE;
1662 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1663 return GL_SLUMINANCE_ALPHA;
1664 default:
1665 return format;
1666 }
1667 }
1668
1669
1670 /**
1671 * Return the equivalent non-generic internal format.
1672 * This is useful for comparing whether two internal formats are equivalent.
1673 */
1674 GLenum
1675 _mesa_get_nongeneric_internalformat(GLenum format)
1676 {
1677 switch (format) {
1678 /* GL 1.1 formats. */
1679 case 4:
1680 case GL_RGBA:
1681 return GL_RGBA8;
1682 case 3:
1683 case GL_RGB:
1684 return GL_RGB8;
1685 case 2:
1686 case GL_LUMINANCE_ALPHA:
1687 return GL_LUMINANCE8_ALPHA8;
1688 case 1:
1689 case GL_LUMINANCE:
1690 return GL_LUMINANCE8;
1691 case GL_ALPHA:
1692 return GL_ALPHA8;
1693 case GL_INTENSITY:
1694 return GL_INTENSITY8;
1695
1696 /* GL_ARB_texture_rg */
1697 case GL_RED:
1698 return GL_R8;
1699 case GL_RG:
1700 return GL_RG8;
1701
1702 /* GL_EXT_texture_sRGB */
1703 case GL_SRGB:
1704 return GL_SRGB8;
1705 case GL_SRGB_ALPHA:
1706 return GL_SRGB8_ALPHA8;
1707 case GL_SLUMINANCE:
1708 return GL_SLUMINANCE8;
1709 case GL_SLUMINANCE_ALPHA:
1710 return GL_SLUMINANCE8_ALPHA8;
1711
1712 /* GL_EXT_texture_snorm */
1713 case GL_RGBA_SNORM:
1714 return GL_RGBA8_SNORM;
1715 case GL_RGB_SNORM:
1716 return GL_RGB8_SNORM;
1717 case GL_RG_SNORM:
1718 return GL_RG8_SNORM;
1719 case GL_RED_SNORM:
1720 return GL_R8_SNORM;
1721 case GL_LUMINANCE_ALPHA_SNORM:
1722 return GL_LUMINANCE8_ALPHA8_SNORM;
1723 case GL_LUMINANCE_SNORM:
1724 return GL_LUMINANCE8_SNORM;
1725 case GL_ALPHA_SNORM:
1726 return GL_ALPHA8_SNORM;
1727 case GL_INTENSITY_SNORM:
1728 return GL_INTENSITY8_SNORM;
1729
1730 default:
1731 return format;
1732 }
1733 }
1734
1735
1736 /**
1737 * Convert an sRGB internal format to linear.
1738 */
1739 GLenum
1740 _mesa_get_linear_internalformat(GLenum format)
1741 {
1742 switch (format) {
1743 case GL_SRGB:
1744 return GL_RGB;
1745 case GL_SRGB_ALPHA:
1746 return GL_RGBA;
1747 case GL_SRGB8:
1748 return GL_RGB8;
1749 case GL_SRGB8_ALPHA8:
1750 return GL_RGBA8;
1751 case GL_SLUMINANCE8:
1752 return GL_LUMINANCE8;
1753 case GL_SLUMINANCE:
1754 return GL_LUMINANCE;
1755 case GL_SLUMINANCE_ALPHA:
1756 return GL_LUMINANCE_ALPHA;
1757 case GL_SLUMINANCE8_ALPHA8:
1758 return GL_LUMINANCE8_ALPHA8;
1759 default:
1760 return format;
1761 }
1762 }
1763
1764
1765 /**
1766 * Do error checking of format/type combinations for glReadPixels,
1767 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1768 * and type values, we may either generate GL_INVALID_OPERATION or
1769 * GL_INVALID_ENUM.
1770 *
1771 * \param format pixel format.
1772 * \param type pixel type.
1773 *
1774 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1775 */
1776 GLenum
1777 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1778 GLenum format, GLenum type)
1779 {
1780 /* From OpenGL 3.3 spec, page 220:
1781 * "If the format is DEPTH_STENCIL, then values are taken from
1782 * both the depth buffer and the stencil buffer. If there is no
1783 * depth buffer or if there is no stencil buffer, then the error
1784 * INVALID_OPERATION occurs. If the type parameter is not
1785 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1786 * error INVALID_ENUM occurs."
1787 *
1788 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1789 * cannot be used to read depth or stencil in that API.
1790 */
1791 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1792 && type != GL_UNSIGNED_INT_24_8
1793 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1794 return GL_INVALID_ENUM;
1795
1796 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1797 switch (type) {
1798 case GL_BITMAP:
1799 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1800 return GL_INVALID_ENUM;
1801 }
1802 break;
1803
1804 case GL_UNSIGNED_BYTE_3_3_2:
1805 case GL_UNSIGNED_BYTE_2_3_3_REV:
1806 case GL_UNSIGNED_SHORT_5_6_5:
1807 case GL_UNSIGNED_SHORT_5_6_5_REV:
1808 if (format == GL_RGB) {
1809 break; /* OK */
1810 }
1811 if (format == GL_RGB_INTEGER_EXT &&
1812 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1813 break; /* OK */
1814 }
1815 return GL_INVALID_OPERATION;
1816
1817 case GL_UNSIGNED_SHORT_4_4_4_4:
1818 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1819 case GL_UNSIGNED_INT_8_8_8_8:
1820 case GL_UNSIGNED_INT_8_8_8_8_REV:
1821 if (format == GL_RGBA ||
1822 format == GL_BGRA ||
1823 format == GL_ABGR_EXT) {
1824 break; /* OK */
1825 }
1826 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1827 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1828 break; /* OK */
1829 }
1830 return GL_INVALID_OPERATION;
1831
1832 case GL_UNSIGNED_SHORT_5_5_5_1:
1833 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1834 case GL_UNSIGNED_INT_10_10_10_2:
1835 case GL_UNSIGNED_INT_2_10_10_10_REV:
1836 if (format == GL_RGBA ||
1837 format == GL_BGRA) {
1838 break; /* OK */
1839 }
1840 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1841 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1842 break; /* OK */
1843 }
1844 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1845 ctx->API == API_OPENGLES2) {
1846 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1847 }
1848 return GL_INVALID_OPERATION;
1849
1850 case GL_UNSIGNED_INT_24_8:
1851 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1852 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1853 return GL_NO_ERROR;
1854
1855 if (format != GL_DEPTH_STENCIL) {
1856 return GL_INVALID_OPERATION;
1857 }
1858 return GL_NO_ERROR;
1859
1860 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1861 if (!ctx->Extensions.ARB_depth_buffer_float) {
1862 return GL_INVALID_ENUM;
1863 }
1864 if (format != GL_DEPTH_STENCIL) {
1865 return GL_INVALID_OPERATION;
1866 }
1867 return GL_NO_ERROR;
1868
1869 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1870 if (!ctx->Extensions.EXT_packed_float) {
1871 return GL_INVALID_ENUM;
1872 }
1873 if (format != GL_RGB) {
1874 return GL_INVALID_OPERATION;
1875 }
1876 return GL_NO_ERROR;
1877
1878 case GL_HALF_FLOAT_OES:
1879 switch (format) {
1880 case GL_RGBA:
1881 case GL_RGB:
1882 case GL_LUMINANCE_ALPHA:
1883 case GL_LUMINANCE:
1884 case GL_ALPHA:
1885 return GL_NO_ERROR;
1886 case GL_RG:
1887 case GL_RED:
1888 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1889 return GL_NO_ERROR;
1890 default:
1891 return GL_INVALID_OPERATION;
1892 }
1893
1894 default:
1895 ; /* fall-through */
1896 }
1897
1898 /* now, for each format, check the type for compatibility */
1899 switch (format) {
1900 case GL_COLOR_INDEX:
1901 case GL_STENCIL_INDEX:
1902 switch (type) {
1903 case GL_BITMAP:
1904 case GL_BYTE:
1905 case GL_UNSIGNED_BYTE:
1906 case GL_SHORT:
1907 case GL_UNSIGNED_SHORT:
1908 case GL_INT:
1909 case GL_UNSIGNED_INT:
1910 case GL_FLOAT:
1911 case GL_HALF_FLOAT:
1912 return GL_NO_ERROR;
1913 default:
1914 return GL_INVALID_ENUM;
1915 }
1916
1917 case GL_RED:
1918 case GL_GREEN:
1919 case GL_BLUE:
1920 case GL_ALPHA:
1921 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1922 case GL_INTENSITY:
1923 #endif
1924 case GL_LUMINANCE:
1925 case GL_LUMINANCE_ALPHA:
1926 case GL_DEPTH_COMPONENT:
1927 switch (type) {
1928 case GL_BYTE:
1929 case GL_UNSIGNED_BYTE:
1930 case GL_SHORT:
1931 case GL_UNSIGNED_SHORT:
1932 case GL_INT:
1933 case GL_UNSIGNED_INT:
1934 case GL_FLOAT:
1935 case GL_HALF_FLOAT:
1936 return GL_NO_ERROR;
1937 default:
1938 return GL_INVALID_ENUM;
1939 }
1940
1941 case GL_RG:
1942 if (!ctx->Extensions.ARB_texture_rg)
1943 return GL_INVALID_ENUM;
1944 switch (type) {
1945 case GL_BYTE:
1946 case GL_UNSIGNED_BYTE:
1947 case GL_SHORT:
1948 case GL_UNSIGNED_SHORT:
1949 case GL_INT:
1950 case GL_UNSIGNED_INT:
1951 case GL_FLOAT:
1952 case GL_HALF_FLOAT:
1953 return GL_NO_ERROR;
1954 default:
1955 return GL_INVALID_ENUM;
1956 }
1957
1958 case GL_RGB:
1959 switch (type) {
1960 case GL_BYTE:
1961 case GL_UNSIGNED_BYTE:
1962 case GL_SHORT:
1963 case GL_UNSIGNED_SHORT:
1964 case GL_INT:
1965 case GL_UNSIGNED_INT:
1966 case GL_FLOAT:
1967 case GL_UNSIGNED_BYTE_3_3_2:
1968 case GL_UNSIGNED_BYTE_2_3_3_REV:
1969 case GL_UNSIGNED_SHORT_5_6_5:
1970 case GL_UNSIGNED_SHORT_5_6_5_REV:
1971 case GL_HALF_FLOAT:
1972 return GL_NO_ERROR;
1973 case GL_UNSIGNED_INT_2_10_10_10_REV:
1974 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1975 return (ctx->API == API_OPENGLES2)
1976 ? GL_NO_ERROR : GL_INVALID_ENUM;
1977 case GL_UNSIGNED_INT_5_9_9_9_REV:
1978 return ctx->Extensions.EXT_texture_shared_exponent
1979 ? GL_NO_ERROR : GL_INVALID_ENUM;
1980 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1981 return ctx->Extensions.EXT_packed_float
1982 ? GL_NO_ERROR : GL_INVALID_ENUM;
1983 default:
1984 return GL_INVALID_ENUM;
1985 }
1986
1987 case GL_BGR:
1988 switch (type) {
1989 /* NOTE: no packed types are supported with BGR. That's
1990 * intentional, according to the GL spec.
1991 */
1992 case GL_BYTE:
1993 case GL_UNSIGNED_BYTE:
1994 case GL_SHORT:
1995 case GL_UNSIGNED_SHORT:
1996 case GL_INT:
1997 case GL_UNSIGNED_INT:
1998 case GL_FLOAT:
1999 case GL_HALF_FLOAT:
2000 return GL_NO_ERROR;
2001 default:
2002 return GL_INVALID_ENUM;
2003 }
2004
2005 case GL_RGBA:
2006 case GL_BGRA:
2007 switch (type) {
2008 case GL_BYTE:
2009 case GL_UNSIGNED_BYTE:
2010 case GL_SHORT:
2011 case GL_UNSIGNED_SHORT:
2012 case GL_INT:
2013 case GL_UNSIGNED_INT:
2014 case GL_FLOAT:
2015 case GL_UNSIGNED_SHORT_4_4_4_4:
2016 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2017 case GL_UNSIGNED_SHORT_5_5_5_1:
2018 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2019 case GL_UNSIGNED_INT_8_8_8_8:
2020 case GL_UNSIGNED_INT_8_8_8_8_REV:
2021 case GL_UNSIGNED_INT_10_10_10_2:
2022 case GL_UNSIGNED_INT_2_10_10_10_REV:
2023 case GL_HALF_FLOAT:
2024 return GL_NO_ERROR;
2025 default:
2026 return GL_INVALID_ENUM;
2027 }
2028
2029 case GL_ABGR_EXT:
2030 switch (type) {
2031 case GL_BYTE:
2032 case GL_UNSIGNED_BYTE:
2033 case GL_SHORT:
2034 case GL_UNSIGNED_SHORT:
2035 case GL_INT:
2036 case GL_UNSIGNED_INT:
2037 case GL_FLOAT:
2038 case GL_UNSIGNED_SHORT_4_4_4_4:
2039 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2040 case GL_UNSIGNED_INT_8_8_8_8:
2041 case GL_UNSIGNED_INT_8_8_8_8_REV:
2042 case GL_HALF_FLOAT:
2043 return GL_NO_ERROR;
2044 default:
2045 return GL_INVALID_ENUM;
2046 }
2047
2048 case GL_YCBCR_MESA:
2049 if (!ctx->Extensions.MESA_ycbcr_texture)
2050 return GL_INVALID_ENUM;
2051 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2052 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2053 return GL_NO_ERROR;
2054 else
2055 return GL_INVALID_OPERATION;
2056
2057 case GL_DEPTH_STENCIL:
2058 if (type == GL_UNSIGNED_INT_24_8)
2059 return GL_NO_ERROR;
2060 else if (ctx->Extensions.ARB_depth_buffer_float &&
2061 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2062 return GL_NO_ERROR;
2063 else
2064 return GL_INVALID_ENUM;
2065
2066 /* integer-valued formats */
2067 case GL_RED_INTEGER_EXT:
2068 case GL_GREEN_INTEGER_EXT:
2069 case GL_BLUE_INTEGER_EXT:
2070 case GL_ALPHA_INTEGER_EXT:
2071 case GL_RG_INTEGER:
2072 switch (type) {
2073 case GL_BYTE:
2074 case GL_UNSIGNED_BYTE:
2075 case GL_SHORT:
2076 case GL_UNSIGNED_SHORT:
2077 case GL_INT:
2078 case GL_UNSIGNED_INT:
2079 return (ctx->Version >= 30 ||
2080 ctx->Extensions.EXT_texture_integer)
2081 ? GL_NO_ERROR : GL_INVALID_ENUM;
2082 default:
2083 return GL_INVALID_ENUM;
2084 }
2085
2086 case GL_RGB_INTEGER_EXT:
2087 switch (type) {
2088 case GL_BYTE:
2089 case GL_UNSIGNED_BYTE:
2090 case GL_SHORT:
2091 case GL_UNSIGNED_SHORT:
2092 case GL_INT:
2093 case GL_UNSIGNED_INT:
2094 return (ctx->Version >= 30 ||
2095 ctx->Extensions.EXT_texture_integer)
2096 ? GL_NO_ERROR : GL_INVALID_ENUM;
2097 case GL_UNSIGNED_BYTE_3_3_2:
2098 case GL_UNSIGNED_BYTE_2_3_3_REV:
2099 case GL_UNSIGNED_SHORT_5_6_5:
2100 case GL_UNSIGNED_SHORT_5_6_5_REV:
2101 return ctx->Extensions.ARB_texture_rgb10_a2ui
2102 ? GL_NO_ERROR : GL_INVALID_ENUM;
2103 default:
2104 return GL_INVALID_ENUM;
2105 }
2106
2107 case GL_BGR_INTEGER_EXT:
2108 switch (type) {
2109 case GL_BYTE:
2110 case GL_UNSIGNED_BYTE:
2111 case GL_SHORT:
2112 case GL_UNSIGNED_SHORT:
2113 case GL_INT:
2114 case GL_UNSIGNED_INT:
2115 /* NOTE: no packed formats w/ BGR format */
2116 return (ctx->Version >= 30 ||
2117 ctx->Extensions.EXT_texture_integer)
2118 ? GL_NO_ERROR : GL_INVALID_ENUM;
2119 default:
2120 return GL_INVALID_ENUM;
2121 }
2122
2123 case GL_RGBA_INTEGER_EXT:
2124 case GL_BGRA_INTEGER_EXT:
2125 switch (type) {
2126 case GL_BYTE:
2127 case GL_UNSIGNED_BYTE:
2128 case GL_SHORT:
2129 case GL_UNSIGNED_SHORT:
2130 case GL_INT:
2131 case GL_UNSIGNED_INT:
2132 return (ctx->Version >= 30 ||
2133 ctx->Extensions.EXT_texture_integer)
2134 ? GL_NO_ERROR : GL_INVALID_ENUM;
2135 case GL_UNSIGNED_SHORT_4_4_4_4:
2136 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2137 case GL_UNSIGNED_SHORT_5_5_5_1:
2138 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2139 case GL_UNSIGNED_INT_8_8_8_8:
2140 case GL_UNSIGNED_INT_8_8_8_8_REV:
2141 case GL_UNSIGNED_INT_10_10_10_2:
2142 case GL_UNSIGNED_INT_2_10_10_10_REV:
2143 return ctx->Extensions.ARB_texture_rgb10_a2ui
2144 ? GL_NO_ERROR : GL_INVALID_ENUM;
2145 default:
2146 return GL_INVALID_ENUM;
2147 }
2148
2149 case GL_LUMINANCE_INTEGER_EXT:
2150 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2151 switch (type) {
2152 case GL_BYTE:
2153 case GL_UNSIGNED_BYTE:
2154 case GL_SHORT:
2155 case GL_UNSIGNED_SHORT:
2156 case GL_INT:
2157 case GL_UNSIGNED_INT:
2158 return ctx->Extensions.EXT_texture_integer
2159 ? GL_NO_ERROR : GL_INVALID_ENUM;
2160 default:
2161 return GL_INVALID_ENUM;
2162 }
2163
2164 default:
2165 return GL_INVALID_ENUM;
2166 }
2167 return GL_NO_ERROR;
2168 }
2169
2170
2171 /**
2172 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2173 * and glTex[Sub]Image.
2174 * \return error code, or GL_NO_ERROR.
2175 */
2176 GLenum
2177 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2178 GLenum format, GLenum type,
2179 unsigned dimensions)
2180 {
2181 GLboolean type_valid = GL_TRUE;
2182
2183 switch (format) {
2184 case GL_RED:
2185 case GL_RG:
2186 if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_texture_rg)
2187 return GL_INVALID_VALUE;
2188 /* fallthrough */
2189 case GL_ALPHA:
2190 case GL_LUMINANCE:
2191 case GL_LUMINANCE_ALPHA:
2192 type_valid = (type == GL_UNSIGNED_BYTE
2193 || type == GL_FLOAT
2194 || type == GL_HALF_FLOAT_OES);
2195 break;
2196
2197 case GL_RGB:
2198 type_valid = (type == GL_UNSIGNED_BYTE
2199 || type == GL_UNSIGNED_SHORT_5_6_5
2200 || type == GL_FLOAT
2201 || type == GL_HALF_FLOAT_OES);
2202 break;
2203
2204 case GL_RGBA:
2205 type_valid = (type == GL_UNSIGNED_BYTE
2206 || type == GL_UNSIGNED_SHORT_4_4_4_4
2207 || type == GL_UNSIGNED_SHORT_5_5_5_1
2208 || type == GL_FLOAT
2209 || type == GL_HALF_FLOAT_OES
2210 || (ctx->Extensions.EXT_texture_type_2_10_10_10_REV &&
2211 type == GL_UNSIGNED_INT_2_10_10_10_REV));
2212 break;
2213
2214 case GL_DEPTH_COMPONENT:
2215 /* This format is filtered against invalid dimensionalities elsewhere.
2216 */
2217 type_valid = (type == GL_UNSIGNED_SHORT
2218 || type == GL_UNSIGNED_INT);
2219 break;
2220
2221 case GL_DEPTH_STENCIL:
2222 /* This format is filtered against invalid dimensionalities elsewhere.
2223 */
2224 type_valid = (type == GL_UNSIGNED_INT_24_8);
2225 break;
2226
2227 case GL_BGRA_EXT:
2228 type_valid = (type == GL_UNSIGNED_BYTE);
2229
2230 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2231 * the format does not appear to be allowed for 3D textures in OpenGL
2232 * ES.
2233 */
2234 if (dimensions != 2)
2235 return GL_INVALID_VALUE;
2236
2237 break;
2238
2239 default:
2240 return GL_INVALID_VALUE;
2241 }
2242
2243 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2244 }
2245
2246 /**
2247 * Return the simple base format for a given internal texture format.
2248 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2249 *
2250 * \param ctx GL context.
2251 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2252 *
2253 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2254 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2255 *
2256 * This is the format which is used during texture application (i.e. the
2257 * texture format and env mode determine the arithmetic used.
2258 */
2259 GLint
2260 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2261 {
2262 switch (internalFormat) {
2263 case GL_ALPHA:
2264 case GL_ALPHA4:
2265 case GL_ALPHA8:
2266 case GL_ALPHA12:
2267 case GL_ALPHA16:
2268 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2269 case 1:
2270 case GL_LUMINANCE:
2271 case GL_LUMINANCE4:
2272 case GL_LUMINANCE8:
2273 case GL_LUMINANCE12:
2274 case GL_LUMINANCE16:
2275 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2276 case 2:
2277 case GL_LUMINANCE_ALPHA:
2278 case GL_LUMINANCE4_ALPHA4:
2279 case GL_LUMINANCE6_ALPHA2:
2280 case GL_LUMINANCE8_ALPHA8:
2281 case GL_LUMINANCE12_ALPHA4:
2282 case GL_LUMINANCE12_ALPHA12:
2283 case GL_LUMINANCE16_ALPHA16:
2284 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2285 case GL_INTENSITY:
2286 case GL_INTENSITY4:
2287 case GL_INTENSITY8:
2288 case GL_INTENSITY12:
2289 case GL_INTENSITY16:
2290 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2291 case 3:
2292 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2293 case GL_RGB:
2294 case GL_R3_G3_B2:
2295 case GL_RGB4:
2296 case GL_RGB5:
2297 case GL_RGB8:
2298 case GL_RGB10:
2299 case GL_RGB12:
2300 case GL_RGB16:
2301 return GL_RGB;
2302 case 4:
2303 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2304 case GL_RGBA:
2305 case GL_RGBA2:
2306 case GL_RGBA4:
2307 case GL_RGB5_A1:
2308 case GL_RGBA8:
2309 case GL_RGB10_A2:
2310 case GL_RGBA12:
2311 case GL_RGBA16:
2312 return GL_RGBA;
2313 default:
2314 ; /* fallthrough */
2315 }
2316
2317 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2318 */
2319 if (_mesa_is_gles(ctx)) {
2320 switch (internalFormat) {
2321 case GL_BGRA:
2322 return GL_RGBA;
2323 default:
2324 ; /* fallthrough */
2325 }
2326 }
2327
2328 if (ctx->Extensions.ARB_ES2_compatibility) {
2329 switch (internalFormat) {
2330 case GL_RGB565:
2331 return GL_RGB;
2332 default:
2333 ; /* fallthrough */
2334 }
2335 }
2336
2337 if (ctx->Extensions.ARB_depth_texture) {
2338 switch (internalFormat) {
2339 case GL_DEPTH_COMPONENT:
2340 case GL_DEPTH_COMPONENT16:
2341 case GL_DEPTH_COMPONENT24:
2342 case GL_DEPTH_COMPONENT32:
2343 return GL_DEPTH_COMPONENT;
2344 case GL_DEPTH_STENCIL:
2345 case GL_DEPTH24_STENCIL8:
2346 return GL_DEPTH_STENCIL;
2347 default:
2348 ; /* fallthrough */
2349 }
2350 }
2351
2352 if (ctx->Extensions.ARB_texture_stencil8) {
2353 switch (internalFormat) {
2354 case GL_STENCIL_INDEX:
2355 case GL_STENCIL_INDEX1:
2356 case GL_STENCIL_INDEX4:
2357 case GL_STENCIL_INDEX8:
2358 case GL_STENCIL_INDEX16:
2359 return GL_STENCIL_INDEX;
2360 default:
2361 ; /* fallthrough */
2362 }
2363 }
2364
2365 switch (internalFormat) {
2366 case GL_COMPRESSED_ALPHA:
2367 return GL_ALPHA;
2368 case GL_COMPRESSED_LUMINANCE:
2369 return GL_LUMINANCE;
2370 case GL_COMPRESSED_LUMINANCE_ALPHA:
2371 return GL_LUMINANCE_ALPHA;
2372 case GL_COMPRESSED_INTENSITY:
2373 return GL_INTENSITY;
2374 case GL_COMPRESSED_RGB:
2375 return GL_RGB;
2376 case GL_COMPRESSED_RGBA:
2377 return GL_RGBA;
2378 default:
2379 ; /* fallthrough */
2380 }
2381
2382 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2383 GLenum base_compressed =
2384 _mesa_gl_compressed_format_base_format(internalFormat);
2385 if (base_compressed)
2386 return base_compressed;
2387 }
2388
2389 if ((ctx->Extensions.KHR_texture_compression_astc_ldr &&
2390 is_astc_2d_format(internalFormat)) ||
2391 (ctx->Extensions.OES_texture_compression_astc &&
2392 is_astc_3d_format(internalFormat)))
2393 return GL_RGBA;
2394
2395 if (ctx->Extensions.MESA_ycbcr_texture) {
2396 if (internalFormat == GL_YCBCR_MESA)
2397 return GL_YCBCR_MESA;
2398 }
2399
2400 if (ctx->Extensions.ARB_texture_float) {
2401 switch (internalFormat) {
2402 case GL_ALPHA16F_ARB:
2403 case GL_ALPHA32F_ARB:
2404 return GL_ALPHA;
2405 case GL_RGBA16F_ARB:
2406 case GL_RGBA32F_ARB:
2407 return GL_RGBA;
2408 case GL_RGB16F_ARB:
2409 case GL_RGB32F_ARB:
2410 return GL_RGB;
2411 case GL_INTENSITY16F_ARB:
2412 case GL_INTENSITY32F_ARB:
2413 return GL_INTENSITY;
2414 case GL_LUMINANCE16F_ARB:
2415 case GL_LUMINANCE32F_ARB:
2416 return GL_LUMINANCE;
2417 case GL_LUMINANCE_ALPHA16F_ARB:
2418 case GL_LUMINANCE_ALPHA32F_ARB:
2419 return GL_LUMINANCE_ALPHA;
2420 default:
2421 ; /* fallthrough */
2422 }
2423 }
2424
2425 if (ctx->Extensions.EXT_texture_snorm) {
2426 switch (internalFormat) {
2427 case GL_RED_SNORM:
2428 case GL_R8_SNORM:
2429 case GL_R16_SNORM:
2430 return GL_RED;
2431 case GL_RG_SNORM:
2432 case GL_RG8_SNORM:
2433 case GL_RG16_SNORM:
2434 return GL_RG;
2435 case GL_RGB_SNORM:
2436 case GL_RGB8_SNORM:
2437 case GL_RGB16_SNORM:
2438 return GL_RGB;
2439 case GL_RGBA_SNORM:
2440 case GL_RGBA8_SNORM:
2441 case GL_RGBA16_SNORM:
2442 return GL_RGBA;
2443 case GL_ALPHA_SNORM:
2444 case GL_ALPHA8_SNORM:
2445 case GL_ALPHA16_SNORM:
2446 return GL_ALPHA;
2447 case GL_LUMINANCE_SNORM:
2448 case GL_LUMINANCE8_SNORM:
2449 case GL_LUMINANCE16_SNORM:
2450 return GL_LUMINANCE;
2451 case GL_LUMINANCE_ALPHA_SNORM:
2452 case GL_LUMINANCE8_ALPHA8_SNORM:
2453 case GL_LUMINANCE16_ALPHA16_SNORM:
2454 return GL_LUMINANCE_ALPHA;
2455 case GL_INTENSITY_SNORM:
2456 case GL_INTENSITY8_SNORM:
2457 case GL_INTENSITY16_SNORM:
2458 return GL_INTENSITY;
2459 default:
2460 ; /* fallthrough */
2461 }
2462 }
2463
2464 if (ctx->Extensions.EXT_texture_sRGB) {
2465 switch (internalFormat) {
2466 case GL_SRGB_EXT:
2467 case GL_SRGB8_EXT:
2468 case GL_COMPRESSED_SRGB_EXT:
2469 return GL_RGB;
2470 case GL_SRGB_ALPHA_EXT:
2471 case GL_SRGB8_ALPHA8_EXT:
2472 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2473 return GL_RGBA;
2474 case GL_SLUMINANCE_ALPHA_EXT:
2475 case GL_SLUMINANCE8_ALPHA8_EXT:
2476 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2477 return GL_LUMINANCE_ALPHA;
2478 case GL_SLUMINANCE_EXT:
2479 case GL_SLUMINANCE8_EXT:
2480 case GL_COMPRESSED_SLUMINANCE_EXT:
2481 return GL_LUMINANCE;
2482 default:
2483 ; /* fallthrough */
2484 }
2485 }
2486
2487 if (ctx->Extensions.EXT_texture_sRGB_R8) {
2488 switch (internalFormat) {
2489 case GL_SR8_EXT:
2490 return GL_RED;
2491 default:
2492 ; /* fallthrough */
2493 }
2494 }
2495
2496 if (ctx->Version >= 30 ||
2497 ctx->Extensions.EXT_texture_integer) {
2498 switch (internalFormat) {
2499 case GL_RGBA8UI_EXT:
2500 case GL_RGBA16UI_EXT:
2501 case GL_RGBA32UI_EXT:
2502 case GL_RGBA8I_EXT:
2503 case GL_RGBA16I_EXT:
2504 case GL_RGBA32I_EXT:
2505 return GL_RGBA;
2506 case GL_RGB8UI_EXT:
2507 case GL_RGB16UI_EXT:
2508 case GL_RGB32UI_EXT:
2509 case GL_RGB8I_EXT:
2510 case GL_RGB16I_EXT:
2511 case GL_RGB32I_EXT:
2512 return GL_RGB;
2513 }
2514 }
2515
2516 if (ctx->Extensions.ARB_texture_rgb10_a2ui) {
2517 switch (internalFormat) {
2518 case GL_RGB10_A2UI:
2519 return GL_RGBA;
2520 }
2521 }
2522
2523 if (ctx->Extensions.EXT_texture_integer) {
2524 switch (internalFormat) {
2525 case GL_ALPHA8UI_EXT:
2526 case GL_ALPHA16UI_EXT:
2527 case GL_ALPHA32UI_EXT:
2528 case GL_ALPHA8I_EXT:
2529 case GL_ALPHA16I_EXT:
2530 case GL_ALPHA32I_EXT:
2531 return GL_ALPHA;
2532 case GL_INTENSITY8UI_EXT:
2533 case GL_INTENSITY16UI_EXT:
2534 case GL_INTENSITY32UI_EXT:
2535 case GL_INTENSITY8I_EXT:
2536 case GL_INTENSITY16I_EXT:
2537 case GL_INTENSITY32I_EXT:
2538 return GL_INTENSITY;
2539 case GL_LUMINANCE8UI_EXT:
2540 case GL_LUMINANCE16UI_EXT:
2541 case GL_LUMINANCE32UI_EXT:
2542 case GL_LUMINANCE8I_EXT:
2543 case GL_LUMINANCE16I_EXT:
2544 case GL_LUMINANCE32I_EXT:
2545 return GL_LUMINANCE;
2546 case GL_LUMINANCE_ALPHA8UI_EXT:
2547 case GL_LUMINANCE_ALPHA16UI_EXT:
2548 case GL_LUMINANCE_ALPHA32UI_EXT:
2549 case GL_LUMINANCE_ALPHA8I_EXT:
2550 case GL_LUMINANCE_ALPHA16I_EXT:
2551 case GL_LUMINANCE_ALPHA32I_EXT:
2552 return GL_LUMINANCE_ALPHA;
2553 default:
2554 ; /* fallthrough */
2555 }
2556 }
2557
2558 if (ctx->Extensions.ARB_texture_rg) {
2559 switch (internalFormat) {
2560 case GL_R16F:
2561 case GL_R32F:
2562 if (!ctx->Extensions.ARB_texture_float)
2563 break;
2564 return GL_RED;
2565 case GL_R8I:
2566 case GL_R8UI:
2567 case GL_R16I:
2568 case GL_R16UI:
2569 case GL_R32I:
2570 case GL_R32UI:
2571 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2572 break;
2573 /* FALLTHROUGH */
2574 case GL_R8:
2575 case GL_R16:
2576 case GL_RED:
2577 case GL_COMPRESSED_RED:
2578 return GL_RED;
2579
2580 case GL_RG16F:
2581 case GL_RG32F:
2582 if (!ctx->Extensions.ARB_texture_float)
2583 break;
2584 return GL_RG;
2585 case GL_RG8I:
2586 case GL_RG8UI:
2587 case GL_RG16I:
2588 case GL_RG16UI:
2589 case GL_RG32I:
2590 case GL_RG32UI:
2591 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2592 break;
2593 /* FALLTHROUGH */
2594 case GL_RG:
2595 case GL_RG8:
2596 case GL_RG16:
2597 case GL_COMPRESSED_RG:
2598 return GL_RG;
2599 default:
2600 ; /* fallthrough */
2601 }
2602 }
2603
2604 if (ctx->Extensions.EXT_texture_shared_exponent) {
2605 switch (internalFormat) {
2606 case GL_RGB9_E5_EXT:
2607 return GL_RGB;
2608 default:
2609 ; /* fallthrough */
2610 }
2611 }
2612
2613 if (ctx->Extensions.EXT_packed_float) {
2614 switch (internalFormat) {
2615 case GL_R11F_G11F_B10F_EXT:
2616 return GL_RGB;
2617 default:
2618 ; /* fallthrough */
2619 }
2620 }
2621
2622 if (ctx->Extensions.ARB_depth_buffer_float) {
2623 switch (internalFormat) {
2624 case GL_DEPTH_COMPONENT32F:
2625 return GL_DEPTH_COMPONENT;
2626 case GL_DEPTH32F_STENCIL8:
2627 return GL_DEPTH_STENCIL;
2628 default:
2629 ; /* fallthrough */
2630 }
2631 }
2632
2633 return -1; /* error */
2634 }
2635
2636 /**
2637 * Returns the effective internal format from a texture format and type.
2638 * This is used by texture image operations internally for validation, when
2639 * the specified internal format is a base (unsized) format.
2640 *
2641 * This method will only return a valid effective internal format if the
2642 * combination of format, type and internal format in base form, is acceptable.
2643 *
2644 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2645 * in extensions, to unambiguously correspond to the given base format, then
2646 * that internal format is returned as the effective. Otherwise, if the
2647 * combination is accepted but a single effective format is not defined, the
2648 * passed base format will be returned instead.
2649 *
2650 * \param format the texture format
2651 * \param type the texture type
2652 */
2653 static GLenum
2654 gles_effective_internal_format_for_format_and_type(GLenum format,
2655 GLenum type)
2656 {
2657 switch (type) {
2658 case GL_UNSIGNED_BYTE:
2659 switch (format) {
2660 case GL_RGBA:
2661 return GL_RGBA8;
2662 case GL_RGB:
2663 return GL_RGB8;
2664 case GL_RG:
2665 return GL_RG8;
2666 case GL_RED:
2667 return GL_R8;
2668 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2669 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2670 * internal formats, they do not correspond to GL constants, so the base
2671 * format is returned instead.
2672 */
2673 case GL_BGRA_EXT:
2674 case GL_LUMINANCE_ALPHA:
2675 case GL_LUMINANCE:
2676 case GL_ALPHA:
2677 return format;
2678 }
2679 break;
2680
2681 case GL_UNSIGNED_SHORT_4_4_4_4:
2682 if (format == GL_RGBA)
2683 return GL_RGBA4;
2684 break;
2685
2686 case GL_UNSIGNED_SHORT_5_5_5_1:
2687 if (format == GL_RGBA)
2688 return GL_RGB5_A1;
2689 break;
2690
2691 case GL_UNSIGNED_SHORT_5_6_5:
2692 if (format == GL_RGB)
2693 return GL_RGB565;
2694 break;
2695
2696 /* OES_packed_depth_stencil */
2697 case GL_UNSIGNED_INT_24_8:
2698 if (format == GL_DEPTH_STENCIL)
2699 return GL_DEPTH24_STENCIL8;
2700 break;
2701
2702 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2703 if (format == GL_DEPTH_STENCIL)
2704 return GL_DEPTH32F_STENCIL8;
2705 break;
2706
2707 case GL_UNSIGNED_SHORT:
2708 if (format == GL_DEPTH_COMPONENT)
2709 return GL_DEPTH_COMPONENT16;
2710 break;
2711
2712 case GL_UNSIGNED_INT:
2713 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2714 * the format.
2715 */
2716 if (format == GL_DEPTH_COMPONENT)
2717 return format;
2718 break;
2719
2720 /* OES_texture_float and OES_texture_half_float */
2721 case GL_FLOAT:
2722 if (format == GL_DEPTH_COMPONENT)
2723 return GL_DEPTH_COMPONENT32F;
2724 /* fall through */
2725 case GL_HALF_FLOAT_OES:
2726 switch (format) {
2727 case GL_RGBA:
2728 case GL_RGB:
2729 case GL_LUMINANCE_ALPHA:
2730 case GL_LUMINANCE:
2731 case GL_ALPHA:
2732 case GL_RED:
2733 case GL_RG:
2734 return format;
2735 }
2736 break;
2737 case GL_HALF_FLOAT:
2738 switch (format) {
2739 case GL_RG:
2740 case GL_RED:
2741 return format;
2742 }
2743 break;
2744
2745 /* GL_EXT_texture_type_2_10_10_10_REV */
2746 case GL_UNSIGNED_INT_2_10_10_10_REV:
2747 switch (format) {
2748 case GL_RGBA:
2749 case GL_RGB:
2750 return format;
2751 }
2752 break;
2753
2754 default:
2755 /* fall through and return NONE */
2756 break;
2757 }
2758
2759 return GL_NONE;
2760 }
2761
2762 /**
2763 * Do error checking of format/type combinations for OpenGL ES 3
2764 * glTex[Sub]Image, or ES1/ES2 with GL_OES_required_internalformat.
2765 * \return error code, or GL_NO_ERROR.
2766 */
2767 GLenum
2768 _mesa_gles_error_check_format_and_type(const struct gl_context *ctx,
2769 GLenum format, GLenum type,
2770 GLenum internalFormat)
2771 {
2772 /* If internalFormat is an unsized format, then the effective internal
2773 * format derived from format and type should be used instead. Page 127,
2774 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2775 *
2776 * "if internalformat is a base internal format, the effective
2777 * internal format is a sized internal format that is derived
2778 * from the format and type for internal use by the GL.
2779 * Table 3.12 specifies the mapping of format and type to effective
2780 * internal formats. The effective internal format is used by the GL
2781 * for purposes such as texture completeness or type checks for
2782 * CopyTex* commands. In these cases, the GL is required to operate
2783 * as if the effective internal format was used as the internalformat
2784 * when specifying the texture data."
2785 */
2786 if (_mesa_is_enum_format_unsized(internalFormat)) {
2787 GLenum effectiveInternalFormat =
2788 gles_effective_internal_format_for_format_and_type(format, type);
2789
2790 if (effectiveInternalFormat == GL_NONE)
2791 return GL_INVALID_OPERATION;
2792
2793 GLenum baseInternalFormat;
2794 if (internalFormat == GL_BGRA_EXT) {
2795 /* Unfortunately, _mesa_base_tex_format returns a base format of
2796 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2797 * asking the question, "what channels does this format have?"
2798 * However, if we're trying to determine if two internal formats
2799 * match in the ES3 sense, we actually want GL_BGRA.
2800 */
2801 baseInternalFormat = GL_BGRA_EXT;
2802 } else {
2803 baseInternalFormat =
2804 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2805 }
2806
2807 if (internalFormat != baseInternalFormat)
2808 return GL_INVALID_OPERATION;
2809
2810 internalFormat = effectiveInternalFormat;
2811 }
2812
2813 /* The GLES variant of EXT_texture_compression_s3tc is very vague and
2814 * doesn't list valid types. Just do exactly what the spec says.
2815 */
2816 if (ctx->Extensions.EXT_texture_compression_s3tc &&
2817 (internalFormat == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||
2818 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ||
2819 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT3_EXT ||
2820 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT5_EXT))
2821 return format == GL_RGB || format == GL_RGBA ? GL_NO_ERROR :
2822 GL_INVALID_OPERATION;
2823
2824 switch (format) {
2825 case GL_BGRA_EXT:
2826 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2827 return GL_INVALID_OPERATION;
2828 break;
2829
2830 case GL_RGBA:
2831 switch (type) {
2832 case GL_UNSIGNED_BYTE:
2833 switch (internalFormat) {
2834 case GL_RGBA:
2835 case GL_RGBA8:
2836 case GL_RGB5_A1:
2837 case GL_RGBA4:
2838 break;
2839 case GL_SRGB8_ALPHA8_EXT:
2840 if (ctx->Version <= 20)
2841 return GL_INVALID_OPERATION;
2842 break;
2843 default:
2844 return GL_INVALID_OPERATION;
2845 }
2846 break;
2847
2848 case GL_BYTE:
2849 if (ctx->Version <= 20 || internalFormat != GL_RGBA8_SNORM)
2850 return GL_INVALID_OPERATION;
2851 break;
2852
2853 case GL_UNSIGNED_SHORT:
2854 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGBA16)
2855 return GL_INVALID_OPERATION;
2856 break;
2857
2858 case GL_SHORT:
2859 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2860 internalFormat != GL_RGBA16_SNORM)
2861 return GL_INVALID_OPERATION;
2862 break;
2863
2864 case GL_UNSIGNED_SHORT_4_4_4_4:
2865 switch (internalFormat) {
2866 case GL_RGBA:
2867 case GL_RGBA4:
2868 break;
2869 default:
2870 return GL_INVALID_OPERATION;
2871 }
2872 break;
2873
2874 case GL_UNSIGNED_SHORT_5_5_5_1:
2875 switch (internalFormat) {
2876 case GL_RGBA:
2877 case GL_RGB5_A1:
2878 break;
2879 default:
2880 return GL_INVALID_OPERATION;
2881 }
2882 break;
2883
2884 case GL_UNSIGNED_INT_2_10_10_10_REV:
2885 switch (internalFormat) {
2886 case GL_RGBA:
2887 case GL_RGB10_A2:
2888 case GL_RGB5_A1:
2889 if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
2890 return GL_INVALID_OPERATION;
2891 break;
2892 default:
2893 return GL_INVALID_OPERATION;
2894 }
2895 break;
2896
2897 case GL_HALF_FLOAT:
2898 if (ctx->Version <= 20 || internalFormat != GL_RGBA16F)
2899 return GL_INVALID_OPERATION;
2900 break;
2901
2902 case GL_FLOAT:
2903 switch (internalFormat) {
2904 case GL_RGBA16F:
2905 case GL_RGBA32F:
2906 if (ctx->Version <= 20)
2907 return GL_INVALID_OPERATION;
2908 break;
2909 case GL_RGBA:
2910 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2911 break;
2912 default:
2913 return GL_INVALID_OPERATION;
2914 }
2915 break;
2916
2917 case GL_HALF_FLOAT_OES:
2918 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2919 break;
2920 default:
2921 return GL_INVALID_OPERATION;
2922 }
2923 break;
2924
2925 case GL_RGBA_INTEGER:
2926 if (ctx->Version <= 20)
2927 return GL_INVALID_OPERATION;
2928 switch (type) {
2929 case GL_UNSIGNED_BYTE:
2930 if (internalFormat != GL_RGBA8UI)
2931 return GL_INVALID_OPERATION;
2932 break;
2933
2934 case GL_BYTE:
2935 if (internalFormat != GL_RGBA8I)
2936 return GL_INVALID_OPERATION;
2937 break;
2938
2939 case GL_UNSIGNED_SHORT:
2940 if (internalFormat != GL_RGBA16UI)
2941 return GL_INVALID_OPERATION;
2942 break;
2943
2944 case GL_SHORT:
2945 if (internalFormat != GL_RGBA16I)
2946 return GL_INVALID_OPERATION;
2947 break;
2948
2949 case GL_UNSIGNED_INT:
2950 if (internalFormat != GL_RGBA32UI)
2951 return GL_INVALID_OPERATION;
2952 break;
2953
2954 case GL_INT:
2955 if (internalFormat != GL_RGBA32I)
2956 return GL_INVALID_OPERATION;
2957 break;
2958
2959 case GL_UNSIGNED_INT_2_10_10_10_REV:
2960 if (internalFormat != GL_RGB10_A2UI)
2961 return GL_INVALID_OPERATION;
2962 break;
2963
2964 default:
2965 return GL_INVALID_OPERATION;
2966 }
2967 break;
2968
2969 case GL_RGB:
2970 switch (type) {
2971 case GL_UNSIGNED_BYTE:
2972 switch (internalFormat) {
2973 case GL_RGB:
2974 case GL_RGB8:
2975 case GL_RGB565:
2976 break;
2977 case GL_SRGB8:
2978 if (ctx->Version <= 20)
2979 return GL_INVALID_OPERATION;
2980 break;
2981 default:
2982 return GL_INVALID_OPERATION;
2983 }
2984 break;
2985
2986 case GL_BYTE:
2987 if (ctx->Version <= 20 || internalFormat != GL_RGB8_SNORM)
2988 return GL_INVALID_OPERATION;
2989 break;
2990
2991 case GL_UNSIGNED_SHORT:
2992 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGB16)
2993 return GL_INVALID_OPERATION;
2994 break;
2995
2996 case GL_SHORT:
2997 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2998 internalFormat != GL_RGB16_SNORM)
2999 return GL_INVALID_OPERATION;
3000 break;
3001
3002 case GL_UNSIGNED_SHORT_5_6_5:
3003 switch (internalFormat) {
3004 case GL_RGB:
3005 case GL_RGB565:
3006 break;
3007 default:
3008 return GL_INVALID_OPERATION;
3009 }
3010 break;
3011
3012 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3013 if (ctx->Version <= 20 || internalFormat != GL_R11F_G11F_B10F)
3014 return GL_INVALID_OPERATION;
3015 break;
3016
3017 case GL_UNSIGNED_INT_5_9_9_9_REV:
3018 if (ctx->Version <= 20 || internalFormat != GL_RGB9_E5)
3019 return GL_INVALID_OPERATION;
3020 break;
3021
3022 case GL_HALF_FLOAT:
3023 if (ctx->Version <= 20)
3024 return GL_INVALID_OPERATION;
3025 switch (internalFormat) {
3026 case GL_RGB16F:
3027 case GL_R11F_G11F_B10F:
3028 case GL_RGB9_E5:
3029 break;
3030 default:
3031 return GL_INVALID_OPERATION;
3032 }
3033 break;
3034
3035 case GL_FLOAT:
3036 switch (internalFormat) {
3037 case GL_RGB16F:
3038 case GL_RGB32F:
3039 case GL_R11F_G11F_B10F:
3040 case GL_RGB9_E5:
3041 if (ctx->Version <= 20)
3042 return GL_INVALID_OPERATION;
3043 break;
3044 case GL_RGB:
3045 if (ctx->Extensions.OES_texture_float && internalFormat == format)
3046 break;
3047 default:
3048 return GL_INVALID_OPERATION;
3049 }
3050 break;
3051
3052 case GL_HALF_FLOAT_OES:
3053 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3054 return GL_INVALID_OPERATION;
3055 break;
3056
3057 case GL_UNSIGNED_INT_2_10_10_10_REV:
3058 switch (internalFormat) {
3059 case GL_RGB:
3060 case GL_RGB10:
3061 case GL_RGB8:
3062 case GL_RGB565:
3063 /* GL_EXT_texture_type_2_10_10_10_REV allows GL_RGB even though
3064 * GLES3 doesn't, and GL_OES_required_internalformat extends that
3065 * to allow the sized RGB internalformats as well.
3066 */
3067 if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
3068 return GL_INVALID_OPERATION;
3069 break;
3070 default:
3071 return GL_INVALID_OPERATION;
3072 }
3073 break;
3074
3075 default:
3076 return GL_INVALID_OPERATION;
3077 }
3078 break;
3079
3080 case GL_RGB_INTEGER:
3081 if (ctx->Version <= 20)
3082 return GL_INVALID_OPERATION;
3083 switch (type) {
3084 case GL_UNSIGNED_BYTE:
3085 if (internalFormat != GL_RGB8UI)
3086 return GL_INVALID_OPERATION;
3087 break;
3088
3089 case GL_BYTE:
3090 if (internalFormat != GL_RGB8I)
3091 return GL_INVALID_OPERATION;
3092 break;
3093
3094 case GL_UNSIGNED_SHORT:
3095 if (internalFormat != GL_RGB16UI)
3096 return GL_INVALID_OPERATION;
3097 break;
3098
3099 case GL_SHORT:
3100 if (internalFormat != GL_RGB16I)
3101 return GL_INVALID_OPERATION;
3102 break;
3103
3104 case GL_UNSIGNED_INT:
3105 if (internalFormat != GL_RGB32UI)
3106 return GL_INVALID_OPERATION;
3107 break;
3108
3109 case GL_INT:
3110 if (internalFormat != GL_RGB32I)
3111 return GL_INVALID_OPERATION;
3112 break;
3113
3114 default:
3115 return GL_INVALID_OPERATION;
3116 }
3117 break;
3118
3119 case GL_RG:
3120 if (!ctx->Extensions.ARB_texture_rg)
3121 return GL_INVALID_OPERATION;
3122 switch (type) {
3123 case GL_UNSIGNED_BYTE:
3124 if (internalFormat != GL_RG8)
3125 return GL_INVALID_OPERATION;
3126 break;
3127
3128 case GL_BYTE:
3129 if (internalFormat != GL_RG8_SNORM)
3130 return GL_INVALID_OPERATION;
3131 break;
3132
3133 case GL_UNSIGNED_SHORT:
3134 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RG16)
3135 return GL_INVALID_OPERATION;
3136 break;
3137
3138 case GL_SHORT:
3139 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3140 internalFormat != GL_RG16_SNORM)
3141 return GL_INVALID_OPERATION;
3142 break;
3143
3144 case GL_HALF_FLOAT:
3145 case GL_HALF_FLOAT_OES:
3146 switch (internalFormat) {
3147 case GL_RG16F:
3148 if (ctx->Version <= 20)
3149 return GL_INVALID_OPERATION;
3150 break;
3151 case GL_RG:
3152 if (ctx->Extensions.ARB_texture_rg &&
3153 ctx->Extensions.OES_texture_half_float)
3154 break;
3155 /* fallthrough */
3156 default:
3157 return GL_INVALID_OPERATION;
3158 }
3159 break;
3160
3161 case GL_FLOAT:
3162 switch (internalFormat) {
3163 case GL_RG16F:
3164 case GL_RG32F:
3165 break;
3166 case GL_RG:
3167 if (ctx->Extensions.ARB_texture_rg &&
3168 ctx->Extensions.OES_texture_float)
3169 break;
3170 /* fallthrough */
3171 default:
3172 return GL_INVALID_OPERATION;
3173 }
3174 break;
3175
3176 default:
3177 return GL_INVALID_OPERATION;
3178 }
3179 break;
3180
3181 case GL_RG_INTEGER:
3182 if (ctx->Version <= 20)
3183 return GL_INVALID_OPERATION;
3184 switch (type) {
3185 case GL_UNSIGNED_BYTE:
3186 if (internalFormat != GL_RG8UI)
3187 return GL_INVALID_OPERATION;
3188 break;
3189
3190 case GL_BYTE:
3191 if (internalFormat != GL_RG8I)
3192 return GL_INVALID_OPERATION;
3193 break;
3194
3195 case GL_UNSIGNED_SHORT:
3196 if (internalFormat != GL_RG16UI)
3197 return GL_INVALID_OPERATION;
3198 break;
3199
3200 case GL_SHORT:
3201 if (internalFormat != GL_RG16I)
3202 return GL_INVALID_OPERATION;
3203 break;
3204
3205 case GL_UNSIGNED_INT:
3206 if (internalFormat != GL_RG32UI)
3207 return GL_INVALID_OPERATION;
3208 break;
3209
3210 case GL_INT:
3211 if (internalFormat != GL_RG32I)
3212 return GL_INVALID_OPERATION;
3213 break;
3214
3215 default:
3216 return GL_INVALID_OPERATION;
3217 }
3218 break;
3219
3220 case GL_RED:
3221 if (!ctx->Extensions.ARB_texture_rg)
3222 return GL_INVALID_OPERATION;
3223 switch (type) {
3224 case GL_UNSIGNED_BYTE:
3225 if (internalFormat == GL_R8 ||
3226 ((internalFormat == GL_SR8_EXT) &&
3227 ctx->Extensions.EXT_texture_sRGB_R8))
3228 break;
3229 return GL_INVALID_OPERATION;
3230
3231 case GL_BYTE:
3232 if (internalFormat != GL_R8_SNORM)
3233 return GL_INVALID_OPERATION;
3234 break;
3235
3236 case GL_UNSIGNED_SHORT:
3237 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_R16)
3238 return GL_INVALID_OPERATION;
3239 break;
3240
3241 case GL_SHORT:
3242 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3243 internalFormat != GL_R16_SNORM)
3244 return GL_INVALID_OPERATION;
3245 break;
3246
3247 case GL_HALF_FLOAT:
3248 case GL_HALF_FLOAT_OES:
3249 switch (internalFormat) {
3250 case GL_R16F:
3251 if (ctx->Version <= 20)
3252 return GL_INVALID_OPERATION;
3253 break;
3254 case GL_RG:
3255 case GL_RED:
3256 if (ctx->Extensions.ARB_texture_rg &&
3257 ctx->Extensions.OES_texture_half_float)
3258 break;
3259 /* fallthrough */
3260 default:
3261 return GL_INVALID_OPERATION;
3262 }
3263 break;
3264
3265 case GL_FLOAT:
3266 switch (internalFormat) {
3267 case GL_R16F:
3268 case GL_R32F:
3269 break;
3270 case GL_RED:
3271 if (ctx->Extensions.ARB_texture_rg &&
3272 ctx->Extensions.OES_texture_float)
3273 break;
3274 /* fallthrough */
3275 default:
3276 return GL_INVALID_OPERATION;
3277 }
3278 break;
3279
3280 default:
3281 return GL_INVALID_OPERATION;
3282 }
3283 break;
3284
3285 case GL_RED_INTEGER:
3286 if (ctx->Version <= 20)
3287 return GL_INVALID_OPERATION;
3288 switch (type) {
3289 case GL_UNSIGNED_BYTE:
3290 if (internalFormat != GL_R8UI)
3291 return GL_INVALID_OPERATION;
3292 break;
3293
3294 case GL_BYTE:
3295 if (internalFormat != GL_R8I)
3296 return GL_INVALID_OPERATION;
3297 break;
3298
3299 case GL_UNSIGNED_SHORT:
3300 if (internalFormat != GL_R16UI)
3301 return GL_INVALID_OPERATION;
3302 break;
3303
3304 case GL_SHORT:
3305 if (internalFormat != GL_R16I)
3306 return GL_INVALID_OPERATION;
3307 break;
3308
3309 case GL_UNSIGNED_INT:
3310 if (internalFormat != GL_R32UI)
3311 return GL_INVALID_OPERATION;
3312 break;
3313
3314 case GL_INT:
3315 if (internalFormat != GL_R32I)
3316 return GL_INVALID_OPERATION;
3317 break;
3318
3319 default:
3320 return GL_INVALID_OPERATION;
3321 }
3322 break;
3323
3324 case GL_DEPTH_COMPONENT:
3325 switch (type) {
3326 case GL_UNSIGNED_SHORT:
3327 if (internalFormat != GL_DEPTH_COMPONENT
3328 && internalFormat != GL_DEPTH_COMPONENT16)
3329 return GL_INVALID_OPERATION;
3330 break;
3331
3332 case GL_UNSIGNED_INT:
3333 switch (internalFormat) {
3334 case GL_DEPTH_COMPONENT:
3335 case GL_DEPTH_COMPONENT16:
3336 case GL_DEPTH_COMPONENT24:
3337 break;
3338 default:
3339 return GL_INVALID_OPERATION;
3340 }
3341 break;
3342
3343 case GL_FLOAT:
3344 if (ctx->Version <= 20 || internalFormat != GL_DEPTH_COMPONENT32F)
3345 return GL_INVALID_OPERATION;
3346 break;
3347
3348 default:
3349 return GL_INVALID_OPERATION;
3350 }
3351 break;
3352
3353 case GL_DEPTH_STENCIL:
3354 switch (type) {
3355 case GL_UNSIGNED_INT_24_8:
3356 if (internalFormat != GL_DEPTH_STENCIL
3357 && internalFormat != GL_DEPTH24_STENCIL8)
3358 return GL_INVALID_OPERATION;
3359 break;
3360
3361 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3362 if (ctx->Version <= 20 || internalFormat != GL_DEPTH32F_STENCIL8)
3363 return GL_INVALID_OPERATION;
3364 break;
3365
3366 default:
3367 return GL_INVALID_OPERATION;
3368 }
3369 break;
3370
3371 case GL_STENCIL_INDEX:
3372 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3373 type != GL_UNSIGNED_BYTE ||
3374 internalFormat != GL_STENCIL_INDEX8) {
3375 return GL_INVALID_OPERATION;
3376 }
3377 break;
3378
3379 case GL_ALPHA:
3380 case GL_LUMINANCE:
3381 case GL_LUMINANCE_ALPHA:
3382 switch (type) {
3383 case GL_FLOAT:
3384 if (!ctx->Extensions.OES_texture_float || internalFormat != format)
3385 return GL_INVALID_OPERATION;
3386 break;
3387 case GL_HALF_FLOAT_OES:
3388 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3389 return GL_INVALID_OPERATION;
3390 break;
3391 case GL_UNSIGNED_BYTE:
3392 if (!(format == internalFormat ||
3393 (format == GL_ALPHA && internalFormat == GL_ALPHA8) ||
3394 (format == GL_LUMINANCE && internalFormat == GL_LUMINANCE8) ||
3395 (format == GL_LUMINANCE_ALPHA &&
3396 ((internalFormat == GL_LUMINANCE8_ALPHA8) ||
3397 (internalFormat == GL_LUMINANCE4_ALPHA4))))) {
3398 return GL_INVALID_OPERATION;
3399 }
3400 break;
3401 default:
3402 return GL_INVALID_OPERATION;
3403 }
3404 break;
3405 }
3406
3407 return GL_NO_ERROR;
3408 }
3409
3410 static void
3411 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3412 {
3413 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3414 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3415 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3416 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3417 }
3418
3419 static bool
3420 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3421 {
3422 switch (format) {
3423 case GL_RGBA:
3424 case GL_RGBA_INTEGER_EXT:
3425 set_swizzle(swizzle, 0, 1, 2, 3);
3426 return true;
3427 case GL_BGRA:
3428 case GL_BGRA_INTEGER_EXT:
3429 set_swizzle(swizzle, 2, 1, 0, 3);
3430 return true;
3431 case GL_ABGR_EXT:
3432 set_swizzle(swizzle, 3, 2, 1, 0);
3433 return true;
3434 case GL_RGB:
3435 case GL_RGB_INTEGER_EXT:
3436 set_swizzle(swizzle, 0, 1, 2, 5);
3437 return true;
3438 case GL_BGR:
3439 case GL_BGR_INTEGER_EXT:
3440 set_swizzle(swizzle, 2, 1, 0, 5);
3441 return true;
3442 case GL_LUMINANCE_ALPHA:
3443 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3444 set_swizzle(swizzle, 0, 0, 0, 1);
3445 return true;
3446 case GL_RG:
3447 case GL_RG_INTEGER:
3448 set_swizzle(swizzle, 0, 1, 4, 5);
3449 return true;
3450 case GL_RED:
3451 case GL_RED_INTEGER_EXT:
3452 set_swizzle(swizzle, 0, 4, 4, 5);
3453 return true;
3454 case GL_GREEN:
3455 case GL_GREEN_INTEGER_EXT:
3456 set_swizzle(swizzle, 4, 0, 4, 5);
3457 return true;
3458 case GL_BLUE:
3459 case GL_BLUE_INTEGER_EXT:
3460 set_swizzle(swizzle, 4, 4, 0, 5);
3461 return true;
3462 case GL_ALPHA:
3463 case GL_ALPHA_INTEGER_EXT:
3464 set_swizzle(swizzle, 4, 4, 4, 0);
3465 return true;
3466 case GL_LUMINANCE:
3467 case GL_LUMINANCE_INTEGER_EXT:
3468 set_swizzle(swizzle, 0, 0, 0, 5);
3469 return true;
3470 case GL_INTENSITY:
3471 set_swizzle(swizzle, 0, 0, 0, 0);
3472 return true;
3473 default:
3474 return false;
3475 }
3476 }
3477
3478 /**
3479 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3480 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3481 * otherwise (for non-array formats).
3482 *
3483 * This function will typically be used to compute a mesa format from a GL type
3484 * so we can then call _mesa_format_convert. This function does
3485 * not consider byte swapping, so it returns types assuming that no byte
3486 * swapping is involved. If byte swapping is involved then clients are supposed
3487 * to handle that on their side before calling _mesa_format_convert.
3488 *
3489 * This function returns an uint32_t that can pack a mesa_format or a
3490 * mesa_array_format. Clients must check the mesa array format bit
3491 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3492 * format is a mesa_array_format or a mesa_format.
3493 */
3494 uint32_t
3495 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3496 {
3497 bool is_array_format = true;
3498 uint8_t swizzle[4];
3499 bool normalized = false, is_float = false, is_signed = false;
3500 int num_channels = 0, type_size = 0;
3501
3502 /* Extract array format type information from the OpenGL data type */
3503 switch (type) {
3504 case GL_UNSIGNED_BYTE:
3505 type_size = 1;
3506 break;
3507 case GL_BYTE:
3508 type_size = 1;
3509 is_signed = true;
3510 break;
3511 case GL_UNSIGNED_SHORT:
3512 type_size = 2;
3513 break;
3514 case GL_SHORT:
3515 type_size = 2;
3516 is_signed = true;
3517 break;
3518 case GL_UNSIGNED_INT:
3519 type_size = 4;
3520 break;
3521 case GL_INT:
3522 type_size = 4;
3523 is_signed = true;
3524 break;
3525 case GL_HALF_FLOAT:
3526 case GL_HALF_FLOAT_OES:
3527 type_size = 2;
3528 is_signed = true;
3529 is_float = true;
3530 break;
3531 case GL_FLOAT:
3532 type_size = 4;
3533 is_signed = true;
3534 is_float = true;
3535 break;
3536 default:
3537 is_array_format = false;
3538 break;
3539 }
3540
3541 /* Extract array format swizzle information from the OpenGL format */
3542 if (is_array_format)
3543 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3544
3545 /* If this is an array format type after checking data type and format,
3546 * create the array format
3547 */
3548 if (is_array_format) {
3549 normalized = !_mesa_is_enum_format_integer(format);
3550 num_channels = _mesa_components_in_format(format);
3551
3552 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
3553 normalized, num_channels,
3554 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3555 }
3556
3557 /* Otherwise this is not an array format, so return the mesa_format
3558 * matching the OpenGL format and data type
3559 */
3560 switch (type) {
3561 case GL_UNSIGNED_SHORT_5_6_5:
3562 if (format == GL_RGB)
3563 return MESA_FORMAT_B5G6R5_UNORM;
3564 else if (format == GL_BGR)
3565 return MESA_FORMAT_R5G6B5_UNORM;
3566 else if (format == GL_RGB_INTEGER)
3567 return MESA_FORMAT_B5G6R5_UINT;
3568 break;
3569 case GL_UNSIGNED_SHORT_5_6_5_REV:
3570 if (format == GL_RGB)
3571 return MESA_FORMAT_R5G6B5_UNORM;
3572 else if (format == GL_BGR)
3573 return MESA_FORMAT_B5G6R5_UNORM;
3574 else if (format == GL_RGB_INTEGER)
3575 return MESA_FORMAT_R5G6B5_UINT;
3576 break;
3577 case GL_UNSIGNED_SHORT_4_4_4_4:
3578 if (format == GL_RGBA)
3579 return MESA_FORMAT_A4B4G4R4_UNORM;
3580 else if (format == GL_BGRA)
3581 return MESA_FORMAT_A4R4G4B4_UNORM;
3582 else if (format == GL_ABGR_EXT)
3583 return MESA_FORMAT_R4G4B4A4_UNORM;
3584 else if (format == GL_RGBA_INTEGER)
3585 return MESA_FORMAT_A4B4G4R4_UINT;
3586 else if (format == GL_BGRA_INTEGER)
3587 return MESA_FORMAT_A4R4G4B4_UINT;
3588 break;
3589 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3590 if (format == GL_RGBA)
3591 return MESA_FORMAT_R4G4B4A4_UNORM;
3592 else if (format == GL_BGRA)
3593 return MESA_FORMAT_B4G4R4A4_UNORM;
3594 else if (format == GL_ABGR_EXT)
3595 return MESA_FORMAT_A4B4G4R4_UNORM;
3596 else if (format == GL_RGBA_INTEGER)
3597 return MESA_FORMAT_R4G4B4A4_UINT;
3598 else if (format == GL_BGRA_INTEGER)
3599 return MESA_FORMAT_B4G4R4A4_UINT;
3600 break;
3601 case GL_UNSIGNED_SHORT_5_5_5_1:
3602 if (format == GL_RGBA)
3603 return MESA_FORMAT_A1B5G5R5_UNORM;
3604 else if (format == GL_BGRA)
3605 return MESA_FORMAT_A1R5G5B5_UNORM;
3606 else if (format == GL_RGBA_INTEGER)
3607 return MESA_FORMAT_A1B5G5R5_UINT;
3608 else if (format == GL_BGRA_INTEGER)
3609 return MESA_FORMAT_A1R5G5B5_UINT;
3610 break;
3611 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3612 if (format == GL_RGBA)
3613 return MESA_FORMAT_R5G5B5A1_UNORM;
3614 else if (format == GL_BGRA)
3615 return MESA_FORMAT_B5G5R5A1_UNORM;
3616 else if (format == GL_RGBA_INTEGER)
3617 return MESA_FORMAT_R5G5B5A1_UINT;
3618 else if (format == GL_BGRA_INTEGER)
3619 return MESA_FORMAT_B5G5R5A1_UINT;
3620 break;
3621 case GL_UNSIGNED_BYTE_3_3_2:
3622 if (format == GL_RGB)
3623 return MESA_FORMAT_B2G3R3_UNORM;
3624 else if (format == GL_RGB_INTEGER)
3625 return MESA_FORMAT_B2G3R3_UINT;
3626 break;
3627 case GL_UNSIGNED_BYTE_2_3_3_REV:
3628 if (format == GL_RGB)
3629 return MESA_FORMAT_R3G3B2_UNORM;
3630 else if (format == GL_RGB_INTEGER)
3631 return MESA_FORMAT_R3G3B2_UINT;
3632 break;
3633 case GL_UNSIGNED_INT_5_9_9_9_REV:
3634 if (format == GL_RGB)
3635 return MESA_FORMAT_R9G9B9E5_FLOAT;
3636 break;
3637 case GL_UNSIGNED_INT_10_10_10_2:
3638 if (format == GL_RGBA)
3639 return MESA_FORMAT_A2B10G10R10_UNORM;
3640 else if (format == GL_RGBA_INTEGER)
3641 return MESA_FORMAT_A2B10G10R10_UINT;
3642 else if (format == GL_BGRA)
3643 return MESA_FORMAT_A2R10G10B10_UNORM;
3644 else if (format == GL_BGRA_INTEGER)
3645 return MESA_FORMAT_A2R10G10B10_UINT;
3646 break;
3647 case GL_UNSIGNED_INT_2_10_10_10_REV:
3648 if (format == GL_RGB)
3649 return MESA_FORMAT_R10G10B10X2_UNORM;
3650 if (format == GL_RGBA)
3651 return MESA_FORMAT_R10G10B10A2_UNORM;
3652 else if (format == GL_RGBA_INTEGER)
3653 return MESA_FORMAT_R10G10B10A2_UINT;
3654 else if (format == GL_BGRA)
3655 return MESA_FORMAT_B10G10R10A2_UNORM;
3656 else if (format == GL_BGRA_INTEGER)
3657 return MESA_FORMAT_B10G10R10A2_UINT;
3658 break;
3659 case GL_UNSIGNED_INT_8_8_8_8:
3660 if (format == GL_RGBA)
3661 return MESA_FORMAT_A8B8G8R8_UNORM;
3662 else if (format == GL_BGRA)
3663 return MESA_FORMAT_A8R8G8B8_UNORM;
3664 else if (format == GL_ABGR_EXT)
3665 return MESA_FORMAT_R8G8B8A8_UNORM;
3666 else if (format == GL_RGBA_INTEGER)
3667 return MESA_FORMAT_A8B8G8R8_UINT;
3668 else if (format == GL_BGRA_INTEGER)
3669 return MESA_FORMAT_A8R8G8B8_UINT;
3670 break;
3671 case GL_UNSIGNED_INT_8_8_8_8_REV:
3672 if (format == GL_RGBA)
3673 return MESA_FORMAT_R8G8B8A8_UNORM;
3674 else if (format == GL_BGRA)
3675 return MESA_FORMAT_B8G8R8A8_UNORM;
3676 else if (format == GL_ABGR_EXT)
3677 return MESA_FORMAT_A8B8G8R8_UNORM;
3678 else if (format == GL_RGBA_INTEGER)
3679 return MESA_FORMAT_R8G8B8A8_UINT;
3680 else if (format == GL_BGRA_INTEGER)
3681 return MESA_FORMAT_B8G8R8A8_UINT;
3682 break;
3683 case GL_UNSIGNED_SHORT_8_8_MESA:
3684 if (format == GL_YCBCR_MESA)
3685 return MESA_FORMAT_YCBCR;
3686 break;
3687 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3688 if (format == GL_YCBCR_MESA)
3689 return MESA_FORMAT_YCBCR_REV;
3690 break;
3691 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3692 if (format == GL_RGB)
3693 return MESA_FORMAT_R11G11B10_FLOAT;
3694 break;
3695 case GL_FLOAT:
3696 if (format == GL_DEPTH_COMPONENT)
3697 return MESA_FORMAT_Z_FLOAT32;
3698 break;
3699 case GL_UNSIGNED_INT:
3700 if (format == GL_DEPTH_COMPONENT)
3701 return MESA_FORMAT_Z_UNORM32;
3702 break;
3703 case GL_UNSIGNED_SHORT:
3704 if (format == GL_DEPTH_COMPONENT)
3705 return MESA_FORMAT_Z_UNORM16;
3706 break;
3707 case GL_UNSIGNED_INT_24_8:
3708 if (format == GL_DEPTH_STENCIL)
3709 return MESA_FORMAT_Z24_UNORM_S8_UINT;
3710 break;
3711 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3712 if (format == GL_DEPTH_STENCIL)
3713 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3714 break;
3715 default:
3716 break;
3717 }
3718
3719 /* If we got here it means that we could not find a Mesa format that
3720 * matches the GL format/type provided. We may need to add a new Mesa
3721 * format in that case.
3722 */
3723 unreachable("Unsupported format");
3724 }
3725
3726 uint32_t
3727 _mesa_tex_format_from_format_and_type(const struct gl_context *ctx,
3728 GLenum gl_format, GLenum type)
3729 {
3730 mesa_format format = _mesa_format_from_format_and_type(gl_format, type);
3731
3732 if (_mesa_format_is_mesa_array_format(format))
3733 format = _mesa_format_from_array_format(format);
3734
3735 if (format == MESA_FORMAT_NONE || !ctx->TextureFormatSupported[format])
3736 return MESA_FORMAT_NONE;
3737
3738 return format;
3739 }
3740
3741 /**
3742 * Returns true if \p internal_format is a sized internal format that
3743 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
3744 */
3745 bool
3746 _mesa_is_es3_color_renderable(const struct gl_context *ctx,
3747 GLenum internal_format)
3748 {
3749 switch (internal_format) {
3750 case GL_R8:
3751 case GL_RG8:
3752 case GL_RGB8:
3753 case GL_RGB565:
3754 case GL_RGBA4:
3755 case GL_RGB5_A1:
3756 case GL_RGBA8:
3757 case GL_RGB10_A2:
3758 case GL_RGB10_A2UI:
3759 case GL_SRGB8_ALPHA8:
3760 case GL_R16F:
3761 case GL_RG16F:
3762 case GL_RGBA16F:
3763 case GL_R32F:
3764 case GL_RG32F:
3765 case GL_RGBA32F:
3766 case GL_R11F_G11F_B10F:
3767 case GL_R8I:
3768 case GL_R8UI:
3769 case GL_R16I:
3770 case GL_R16UI:
3771 case GL_R32I:
3772 case GL_R32UI:
3773 case GL_RG8I:
3774 case GL_RG8UI:
3775 case GL_RG16I:
3776 case GL_RG16UI:
3777 case GL_RG32I:
3778 case GL_RG32UI:
3779 case GL_RGBA8I:
3780 case GL_RGBA8UI:
3781 case GL_RGBA16I:
3782 case GL_RGBA16UI:
3783 case GL_RGBA32I:
3784 case GL_RGBA32UI:
3785 return true;
3786 case GL_R16:
3787 case GL_RG16:
3788 case GL_RGBA16:
3789 return _mesa_has_EXT_texture_norm16(ctx);
3790 case GL_R8_SNORM:
3791 case GL_RG8_SNORM:
3792 case GL_RGBA8_SNORM:
3793 return _mesa_has_EXT_render_snorm(ctx);
3794 case GL_R16_SNORM:
3795 case GL_RG16_SNORM:
3796 case GL_RGBA16_SNORM:
3797 return _mesa_has_EXT_texture_norm16(ctx) &&
3798 _mesa_has_EXT_render_snorm(ctx);
3799 default:
3800 return false;
3801 }
3802 }
3803
3804 /**
3805 * Returns true if \p internal_format is a sized internal format that
3806 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
3807 */
3808 bool
3809 _mesa_is_es3_texture_filterable(const struct gl_context *ctx,
3810 GLenum internal_format)
3811 {
3812 switch (internal_format) {
3813 case GL_R8:
3814 case GL_R8_SNORM:
3815 case GL_RG8:
3816 case GL_RG8_SNORM:
3817 case GL_RGB8:
3818 case GL_RGB8_SNORM:
3819 case GL_RGB565:
3820 case GL_RGBA4:
3821 case GL_RGB5_A1:
3822 case GL_RGBA8:
3823 case GL_RGBA8_SNORM:
3824 case GL_RGB10_A2:
3825 case GL_SRGB8:
3826 case GL_SRGB8_ALPHA8:
3827 case GL_R16F:
3828 case GL_RG16F:
3829 case GL_RGB16F:
3830 case GL_RGBA16F:
3831 case GL_R11F_G11F_B10F:
3832 case GL_RGB9_E5:
3833 return true;
3834 case GL_R16:
3835 case GL_R16_SNORM:
3836 case GL_RG16:
3837 case GL_RG16_SNORM:
3838 case GL_RGB16:
3839 case GL_RGB16_SNORM:
3840 case GL_RGBA16:
3841 case GL_RGBA16_SNORM:
3842 return _mesa_has_EXT_texture_norm16(ctx);
3843 case GL_R32F:
3844 case GL_RG32F:
3845 case GL_RGB32F:
3846 case GL_RGBA32F:
3847 /* The OES_texture_float_linear spec says:
3848 *
3849 * "When implemented against OpenGL ES 3.0 or later versions, sized
3850 * 32-bit floating-point formats become texture-filterable. This
3851 * should be noted by, for example, checking the ``TF'' column of
3852 * table 8.13 in the ES 3.1 Specification (``Correspondence of sized
3853 * internal formats to base internal formats ... and use cases ...'')
3854 * for the R32F, RG32F, RGB32F, and RGBA32F formats."
3855 */
3856 return ctx->Extensions.OES_texture_float_linear;
3857 default:
3858 return false;
3859 }
3860 }