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mesa/main: do not allow type_2_10_10_10_REV enums before gles3
[mesa.git] / src / mesa / main / glformats.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008-2009 VMware, Inc.
6 * Copyright (c) 2012 Intel Corporation
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28 #include "context.h"
29 #include "glformats.h"
30 #include "formats.h"
31 #include "texcompress.h"
32 #include "enums.h"
33
34 enum {
35 ZERO = 4,
36 ONE = 5
37 };
38
39 enum {
40 IDX_LUMINANCE = 0,
41 IDX_ALPHA,
42 IDX_INTENSITY,
43 IDX_LUMINANCE_ALPHA,
44 IDX_RGB,
45 IDX_RGBA,
46 IDX_RED,
47 IDX_GREEN,
48 IDX_BLUE,
49 IDX_BGR,
50 IDX_BGRA,
51 IDX_ABGR,
52 IDX_RG,
53 MAX_IDX
54 };
55
56 #define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
57 #define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
58 #define MAP3(x,y,z) MAP4(x, y, z, ZERO)
59 #define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
60
61 static const struct {
62 GLubyte format_idx;
63 GLubyte to_rgba[6];
64 GLubyte from_rgba[6];
65 } mappings[MAX_IDX] =
66 {
67 {
68 IDX_LUMINANCE,
69 MAP4(0,0,0,ONE),
70 MAP1(0)
71 },
72
73 {
74 IDX_ALPHA,
75 MAP4(ZERO, ZERO, ZERO, 0),
76 MAP1(3)
77 },
78
79 {
80 IDX_INTENSITY,
81 MAP4(0, 0, 0, 0),
82 MAP1(0),
83 },
84
85 {
86 IDX_LUMINANCE_ALPHA,
87 MAP4(0,0,0,1),
88 MAP2(0,3)
89 },
90
91 {
92 IDX_RGB,
93 MAP4(0,1,2,ONE),
94 MAP3(0,1,2)
95 },
96
97 {
98 IDX_RGBA,
99 MAP4(0,1,2,3),
100 MAP4(0,1,2,3),
101 },
102
103 {
104 IDX_RED,
105 MAP4(0, ZERO, ZERO, ONE),
106 MAP1(0),
107 },
108
109 {
110 IDX_GREEN,
111 MAP4(ZERO, 0, ZERO, ONE),
112 MAP1(1),
113 },
114
115 {
116 IDX_BLUE,
117 MAP4(ZERO, ZERO, 0, ONE),
118 MAP1(2),
119 },
120
121 {
122 IDX_BGR,
123 MAP4(2,1,0,ONE),
124 MAP3(2,1,0)
125 },
126
127 {
128 IDX_BGRA,
129 MAP4(2,1,0,3),
130 MAP4(2,1,0,3)
131 },
132
133 {
134 IDX_ABGR,
135 MAP4(3,2,1,0),
136 MAP4(3,2,1,0)
137 },
138
139 {
140 IDX_RG,
141 MAP4(0, 1, ZERO, ONE),
142 MAP2(0, 1)
143 },
144 };
145
146 /**
147 * Convert a GL image format enum to an IDX_* value (see above).
148 */
149 static int
150 get_map_idx(GLenum value)
151 {
152 switch (value) {
153 case GL_LUMINANCE:
154 case GL_LUMINANCE_INTEGER_EXT:
155 return IDX_LUMINANCE;
156 case GL_ALPHA:
157 case GL_ALPHA_INTEGER:
158 return IDX_ALPHA;
159 case GL_INTENSITY:
160 return IDX_INTENSITY;
161 case GL_LUMINANCE_ALPHA:
162 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
163 return IDX_LUMINANCE_ALPHA;
164 case GL_RGB:
165 case GL_RGB_INTEGER:
166 return IDX_RGB;
167 case GL_RGBA:
168 case GL_RGBA_INTEGER:
169 return IDX_RGBA;
170 case GL_RED:
171 case GL_RED_INTEGER:
172 return IDX_RED;
173 case GL_GREEN:
174 return IDX_GREEN;
175 case GL_BLUE:
176 return IDX_BLUE;
177 case GL_BGR:
178 case GL_BGR_INTEGER:
179 return IDX_BGR;
180 case GL_BGRA:
181 case GL_BGRA_INTEGER:
182 return IDX_BGRA;
183 case GL_ABGR_EXT:
184 return IDX_ABGR;
185 case GL_RG:
186 case GL_RG_INTEGER:
187 return IDX_RG;
188 default:
189 _mesa_problem(NULL, "Unexpected inFormat %s",
190 _mesa_enum_to_string(value));
191 return 0;
192 }
193 }
194
195 /**
196 * When promoting texture formats (see below) we need to compute the
197 * mapping of dest components back to source components.
198 * This function does that.
199 * \param inFormat the incoming format of the texture
200 * \param outFormat the final texture format
201 * \return map[6] a full 6-component map
202 */
203 void
204 _mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
205 {
206 const int inFmt = get_map_idx(inFormat);
207 const int outFmt = get_map_idx(outFormat);
208 const GLubyte *in2rgba = mappings[inFmt].to_rgba;
209 const GLubyte *rgba2out = mappings[outFmt].from_rgba;
210 int i;
211
212 for (i = 0; i < 4; i++)
213 map[i] = in2rgba[rgba2out[i]];
214
215 map[ZERO] = ZERO;
216 map[ONE] = ONE;
217
218 #if 0
219 printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
220 inFormat, _mesa_enum_to_string(inFormat),
221 outFormat, _mesa_enum_to_string(outFormat),
222 map[0],
223 map[1],
224 map[2],
225 map[3],
226 map[4],
227 map[5]);
228 #endif
229 }
230
231 /**
232 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
233 */
234 GLboolean
235 _mesa_type_is_packed(GLenum type)
236 {
237 switch (type) {
238 case GL_UNSIGNED_BYTE_3_3_2:
239 case GL_UNSIGNED_BYTE_2_3_3_REV:
240 case MESA_UNSIGNED_BYTE_4_4:
241 case GL_UNSIGNED_SHORT_5_6_5:
242 case GL_UNSIGNED_SHORT_5_6_5_REV:
243 case GL_UNSIGNED_SHORT_4_4_4_4:
244 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
245 case GL_UNSIGNED_SHORT_5_5_5_1:
246 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
247 case GL_UNSIGNED_INT_8_8_8_8:
248 case GL_UNSIGNED_INT_8_8_8_8_REV:
249 case GL_UNSIGNED_INT_10_10_10_2:
250 case GL_UNSIGNED_INT_2_10_10_10_REV:
251 case GL_UNSIGNED_SHORT_8_8_MESA:
252 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
253 case GL_UNSIGNED_INT_24_8_EXT:
254 case GL_UNSIGNED_INT_5_9_9_9_REV:
255 case GL_UNSIGNED_INT_10F_11F_11F_REV:
256 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
257 return GL_TRUE;
258 }
259
260 return GL_FALSE;
261 }
262
263
264 /**
265 * Get the size of a GL data type.
266 *
267 * \param type GL data type.
268 *
269 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
270 * if an invalid type enum.
271 */
272 GLint
273 _mesa_sizeof_type(GLenum type)
274 {
275 switch (type) {
276 case GL_BITMAP:
277 return 0;
278 case GL_UNSIGNED_BYTE:
279 return sizeof(GLubyte);
280 case GL_BYTE:
281 return sizeof(GLbyte);
282 case GL_UNSIGNED_SHORT:
283 return sizeof(GLushort);
284 case GL_SHORT:
285 return sizeof(GLshort);
286 case GL_UNSIGNED_INT:
287 return sizeof(GLuint);
288 case GL_INT:
289 return sizeof(GLint);
290 case GL_FLOAT:
291 return sizeof(GLfloat);
292 case GL_DOUBLE:
293 return sizeof(GLdouble);
294 case GL_HALF_FLOAT_ARB:
295 case GL_HALF_FLOAT_OES:
296 return sizeof(GLhalfARB);
297 case GL_FIXED:
298 return sizeof(GLfixed);
299 default:
300 return -1;
301 }
302 }
303
304
305 /**
306 * Same as _mesa_sizeof_type() but also accepting the packed pixel
307 * format data types.
308 */
309 GLint
310 _mesa_sizeof_packed_type(GLenum type)
311 {
312 switch (type) {
313 case GL_BITMAP:
314 return 0;
315 case GL_UNSIGNED_BYTE:
316 return sizeof(GLubyte);
317 case GL_BYTE:
318 return sizeof(GLbyte);
319 case GL_UNSIGNED_SHORT:
320 return sizeof(GLushort);
321 case GL_SHORT:
322 return sizeof(GLshort);
323 case GL_UNSIGNED_INT:
324 return sizeof(GLuint);
325 case GL_INT:
326 return sizeof(GLint);
327 case GL_HALF_FLOAT_ARB:
328 case GL_HALF_FLOAT_OES:
329 return sizeof(GLhalfARB);
330 case GL_FLOAT:
331 return sizeof(GLfloat);
332 case GL_UNSIGNED_BYTE_3_3_2:
333 case GL_UNSIGNED_BYTE_2_3_3_REV:
334 case MESA_UNSIGNED_BYTE_4_4:
335 return sizeof(GLubyte);
336 case GL_UNSIGNED_SHORT_5_6_5:
337 case GL_UNSIGNED_SHORT_5_6_5_REV:
338 case GL_UNSIGNED_SHORT_4_4_4_4:
339 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
340 case GL_UNSIGNED_SHORT_5_5_5_1:
341 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
342 case GL_UNSIGNED_SHORT_8_8_MESA:
343 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
344 return sizeof(GLushort);
345 case GL_UNSIGNED_INT_8_8_8_8:
346 case GL_UNSIGNED_INT_8_8_8_8_REV:
347 case GL_UNSIGNED_INT_10_10_10_2:
348 case GL_UNSIGNED_INT_2_10_10_10_REV:
349 case GL_UNSIGNED_INT_24_8_EXT:
350 case GL_UNSIGNED_INT_5_9_9_9_REV:
351 case GL_UNSIGNED_INT_10F_11F_11F_REV:
352 return sizeof(GLuint);
353 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
354 return 8;
355 default:
356 return -1;
357 }
358 }
359
360
361 /**
362 * Get the number of components in a pixel format.
363 *
364 * \param format pixel format.
365 *
366 * \return the number of components in the given format, or -1 if a bad format.
367 */
368 GLint
369 _mesa_components_in_format(GLenum format)
370 {
371 switch (format) {
372 case GL_COLOR_INDEX:
373 case GL_STENCIL_INDEX:
374 case GL_DEPTH_COMPONENT:
375 case GL_RED:
376 case GL_RED_INTEGER_EXT:
377 case GL_GREEN:
378 case GL_GREEN_INTEGER_EXT:
379 case GL_BLUE:
380 case GL_BLUE_INTEGER_EXT:
381 case GL_ALPHA:
382 case GL_ALPHA_INTEGER_EXT:
383 case GL_LUMINANCE:
384 case GL_LUMINANCE_INTEGER_EXT:
385 case GL_INTENSITY:
386 return 1;
387
388 case GL_LUMINANCE_ALPHA:
389 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
390 case GL_RG:
391 case GL_YCBCR_MESA:
392 case GL_DEPTH_STENCIL_EXT:
393 case GL_RG_INTEGER:
394 return 2;
395
396 case GL_RGB:
397 case GL_BGR:
398 case GL_RGB_INTEGER_EXT:
399 case GL_BGR_INTEGER_EXT:
400 return 3;
401
402 case GL_RGBA:
403 case GL_BGRA:
404 case GL_ABGR_EXT:
405 case GL_RGBA_INTEGER_EXT:
406 case GL_BGRA_INTEGER_EXT:
407 return 4;
408
409 default:
410 return -1;
411 }
412 }
413
414
415 /**
416 * Get the bytes per pixel of pixel format type pair.
417 *
418 * \param format pixel format.
419 * \param type pixel type.
420 *
421 * \return bytes per pixel, or -1 if a bad format or type was given.
422 */
423 GLint
424 _mesa_bytes_per_pixel(GLenum format, GLenum type)
425 {
426 GLint comps = _mesa_components_in_format(format);
427 if (comps < 0)
428 return -1;
429
430 switch (type) {
431 case GL_BITMAP:
432 return 0; /* special case */
433 case GL_BYTE:
434 case GL_UNSIGNED_BYTE:
435 return comps * sizeof(GLubyte);
436 case GL_SHORT:
437 case GL_UNSIGNED_SHORT:
438 return comps * sizeof(GLshort);
439 case GL_INT:
440 case GL_UNSIGNED_INT:
441 return comps * sizeof(GLint);
442 case GL_FLOAT:
443 return comps * sizeof(GLfloat);
444 case GL_HALF_FLOAT_ARB:
445 case GL_HALF_FLOAT_OES:
446 return comps * sizeof(GLhalfARB);
447 case GL_UNSIGNED_BYTE_3_3_2:
448 case GL_UNSIGNED_BYTE_2_3_3_REV:
449 if (format == GL_RGB || format == GL_BGR ||
450 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
451 return sizeof(GLubyte);
452 else
453 return -1; /* error */
454 case GL_UNSIGNED_SHORT_5_6_5:
455 case GL_UNSIGNED_SHORT_5_6_5_REV:
456 if (format == GL_RGB || format == GL_BGR ||
457 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
458 return sizeof(GLushort);
459 else
460 return -1; /* error */
461 case GL_UNSIGNED_SHORT_4_4_4_4:
462 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
463 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
464 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
465 return sizeof(GLushort);
466 else
467 return -1;
468 case GL_UNSIGNED_SHORT_5_5_5_1:
469 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
470 if (format == GL_RGBA || format == GL_BGRA ||
471 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
472 return sizeof(GLushort);
473 else
474 return -1;
475 case GL_UNSIGNED_INT_8_8_8_8:
476 case GL_UNSIGNED_INT_8_8_8_8_REV:
477 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
478 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
479 format == GL_RGB)
480 return sizeof(GLuint);
481 else
482 return -1;
483 case GL_UNSIGNED_INT_10_10_10_2:
484 case GL_UNSIGNED_INT_2_10_10_10_REV:
485 if (format == GL_RGBA || format == GL_BGRA ||
486 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
487 format == GL_RGB)
488 return sizeof(GLuint);
489 else
490 return -1;
491 case GL_UNSIGNED_SHORT_8_8_MESA:
492 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
493 if (format == GL_YCBCR_MESA)
494 return sizeof(GLushort);
495 else
496 return -1;
497 case GL_UNSIGNED_INT_24_8_EXT:
498 if (format == GL_DEPTH_COMPONENT ||
499 format == GL_DEPTH_STENCIL_EXT)
500 return sizeof(GLuint);
501 else
502 return -1;
503 case GL_UNSIGNED_INT_5_9_9_9_REV:
504 if (format == GL_RGB)
505 return sizeof(GLuint);
506 else
507 return -1;
508 case GL_UNSIGNED_INT_10F_11F_11F_REV:
509 if (format == GL_RGB)
510 return sizeof(GLuint);
511 else
512 return -1;
513 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
514 if (format == GL_DEPTH_STENCIL)
515 return 8;
516 else
517 return -1;
518 default:
519 return -1;
520 }
521 }
522
523
524 /**
525 * Get the number of bytes for a vertex attrib with the given number of
526 * components and type.
527 *
528 * \param comps number of components.
529 * \param type data type.
530 *
531 * \return bytes per attribute, or -1 if a bad comps/type combination was given.
532 */
533 GLint
534 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
535 {
536 switch (type) {
537 case GL_BYTE:
538 case GL_UNSIGNED_BYTE:
539 return comps * sizeof(GLubyte);
540 case GL_SHORT:
541 case GL_UNSIGNED_SHORT:
542 return comps * sizeof(GLshort);
543 case GL_INT:
544 case GL_UNSIGNED_INT:
545 return comps * sizeof(GLint);
546 case GL_FLOAT:
547 return comps * sizeof(GLfloat);
548 case GL_HALF_FLOAT_ARB:
549 case GL_HALF_FLOAT_OES:
550 return comps * sizeof(GLhalfARB);
551 case GL_DOUBLE:
552 return comps * sizeof(GLdouble);
553 case GL_FIXED:
554 return comps * sizeof(GLfixed);
555 case GL_INT_2_10_10_10_REV:
556 case GL_UNSIGNED_INT_2_10_10_10_REV:
557 if (comps == 4)
558 return sizeof(GLuint);
559 else
560 return -1;
561 case GL_UNSIGNED_INT_10F_11F_11F_REV:
562 if (comps == 3)
563 return sizeof(GLuint);
564 else
565 return -1;
566 case GL_UNSIGNED_INT64_ARB:
567 return comps * 8;
568 default:
569 return -1;
570 }
571 }
572
573 /**
574 * Test if the given format is unsized.
575 */
576 GLboolean
577 _mesa_is_enum_format_unsized(GLenum format)
578 {
579 switch (format) {
580 case GL_RGBA:
581 case GL_BGRA:
582 case GL_ABGR_EXT:
583 case GL_RGB:
584 case GL_BGR:
585 case GL_RG:
586 case GL_RED:
587 case GL_GREEN:
588 case GL_BLUE:
589 case GL_ALPHA:
590 case GL_INTENSITY:
591 case GL_LUMINANCE:
592 case GL_LUMINANCE_ALPHA:
593
594 case GL_SRGB:
595 case GL_SRGB_ALPHA:
596 case GL_SLUMINANCE:
597 case GL_SLUMINANCE_ALPHA:
598
599 case GL_RGBA_SNORM:
600 case GL_RGB_SNORM:
601 case GL_RG_SNORM:
602 case GL_RED_SNORM:
603 case GL_ALPHA_SNORM:
604 case GL_INTENSITY_SNORM:
605 case GL_LUMINANCE_SNORM:
606 case GL_LUMINANCE_ALPHA_SNORM:
607
608 case GL_RED_INTEGER:
609 case GL_GREEN_INTEGER:
610 case GL_BLUE_INTEGER:
611 case GL_ALPHA_INTEGER:
612 case GL_RGB_INTEGER:
613 case GL_RGBA_INTEGER:
614 case GL_BGR_INTEGER:
615 case GL_BGRA_INTEGER:
616 case GL_RG_INTEGER:
617 case GL_LUMINANCE_INTEGER_EXT:
618 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
619
620 case GL_DEPTH_COMPONENT:
621 case GL_DEPTH_STENCIL:
622 case GL_STENCIL_INDEX:
623 return GL_TRUE;
624 default:
625 return GL_FALSE;
626 }
627 }
628
629 /**
630 * Test if the given format is a UNORM (unsigned-normalized) format.
631 */
632 GLboolean
633 _mesa_is_enum_format_unorm(GLenum format)
634 {
635 switch(format) {
636 case GL_RED:
637 case GL_GREEN:
638 case GL_BLUE:
639 case GL_ALPHA:
640 case GL_ALPHA4:
641 case GL_ALPHA8:
642 case GL_ALPHA12:
643 case GL_ALPHA16:
644 case 1:
645 case GL_LUMINANCE:
646 case GL_SLUMINANCE:
647 case GL_LUMINANCE4:
648 case GL_LUMINANCE8:
649 case GL_LUMINANCE12:
650 case GL_LUMINANCE16:
651 case 2:
652 case GL_LUMINANCE_ALPHA:
653 case GL_SLUMINANCE_ALPHA:
654 case GL_LUMINANCE4_ALPHA4:
655 case GL_LUMINANCE6_ALPHA2:
656 case GL_LUMINANCE8_ALPHA8:
657 case GL_LUMINANCE12_ALPHA4:
658 case GL_LUMINANCE12_ALPHA12:
659 case GL_LUMINANCE16_ALPHA16:
660 case GL_INTENSITY:
661 case GL_INTENSITY4:
662 case GL_INTENSITY8:
663 case GL_INTENSITY12:
664 case GL_INTENSITY16:
665 case GL_R8:
666 case GL_R16:
667 case GL_RG:
668 case GL_RG8:
669 case GL_RG16:
670 case 3:
671 case GL_RGB:
672 case GL_BGR:
673 case GL_SRGB:
674 case GL_R3_G3_B2:
675 case GL_RGB4:
676 case GL_RGB5:
677 case GL_RGB565:
678 case GL_RGB8:
679 case GL_RGB10:
680 case GL_RGB12:
681 case GL_RGB16:
682 case 4:
683 case GL_ABGR_EXT:
684 case GL_RGBA:
685 case GL_BGRA:
686 case GL_SRGB_ALPHA:
687 case GL_RGBA2:
688 case GL_RGBA4:
689 case GL_RGB5_A1:
690 case GL_RGBA8:
691 case GL_RGB10_A2:
692 case GL_RGBA12:
693 case GL_RGBA16:
694 return GL_TRUE;
695 default:
696 return GL_FALSE;
697 }
698 }
699
700 /**
701 * Test if the given format is a SNORM (signed-normalized) format.
702 */
703 GLboolean
704 _mesa_is_enum_format_snorm(GLenum format)
705 {
706 switch (format) {
707 /* signed, normalized texture formats */
708 case GL_RED_SNORM:
709 case GL_R8_SNORM:
710 case GL_R16_SNORM:
711 case GL_RG_SNORM:
712 case GL_RG8_SNORM:
713 case GL_RG16_SNORM:
714 case GL_RGB_SNORM:
715 case GL_RGB8_SNORM:
716 case GL_RGB16_SNORM:
717 case GL_RGBA_SNORM:
718 case GL_RGBA8_SNORM:
719 case GL_RGBA16_SNORM:
720 case GL_ALPHA_SNORM:
721 case GL_ALPHA8_SNORM:
722 case GL_ALPHA16_SNORM:
723 case GL_LUMINANCE_SNORM:
724 case GL_LUMINANCE8_SNORM:
725 case GL_LUMINANCE16_SNORM:
726 case GL_LUMINANCE_ALPHA_SNORM:
727 case GL_LUMINANCE8_ALPHA8_SNORM:
728 case GL_LUMINANCE16_ALPHA16_SNORM:
729 case GL_INTENSITY_SNORM:
730 case GL_INTENSITY8_SNORM:
731 case GL_INTENSITY16_SNORM:
732 return GL_TRUE;
733 default:
734 return GL_FALSE;
735 }
736 }
737
738 /**
739 * Test if the given format is an integer (non-normalized) format.
740 */
741 GLboolean
742 _mesa_is_enum_format_unsigned_int(GLenum format)
743 {
744 switch (format) {
745 /* specific integer formats */
746 case GL_RGBA32UI_EXT:
747 case GL_RGB32UI_EXT:
748 case GL_RG32UI:
749 case GL_R32UI:
750 case GL_ALPHA32UI_EXT:
751 case GL_INTENSITY32UI_EXT:
752 case GL_LUMINANCE32UI_EXT:
753 case GL_LUMINANCE_ALPHA32UI_EXT:
754 case GL_RGBA16UI_EXT:
755 case GL_RGB16UI_EXT:
756 case GL_RG16UI:
757 case GL_R16UI:
758 case GL_ALPHA16UI_EXT:
759 case GL_INTENSITY16UI_EXT:
760 case GL_LUMINANCE16UI_EXT:
761 case GL_LUMINANCE_ALPHA16UI_EXT:
762 case GL_RGBA8UI_EXT:
763 case GL_RGB8UI_EXT:
764 case GL_RG8UI:
765 case GL_R8UI:
766 case GL_ALPHA8UI_EXT:
767 case GL_INTENSITY8UI_EXT:
768 case GL_LUMINANCE8UI_EXT:
769 case GL_LUMINANCE_ALPHA8UI_EXT:
770 case GL_RGB10_A2UI:
771 return GL_TRUE;
772 default:
773 return GL_FALSE;
774 }
775 }
776
777
778 /**
779 * Test if the given format is an integer (non-normalized) format.
780 */
781 GLboolean
782 _mesa_is_enum_format_signed_int(GLenum format)
783 {
784 switch (format) {
785 /* generic integer formats */
786 case GL_RED_INTEGER_EXT:
787 case GL_GREEN_INTEGER_EXT:
788 case GL_BLUE_INTEGER_EXT:
789 case GL_ALPHA_INTEGER_EXT:
790 case GL_RGB_INTEGER_EXT:
791 case GL_RGBA_INTEGER_EXT:
792 case GL_BGR_INTEGER_EXT:
793 case GL_BGRA_INTEGER_EXT:
794 case GL_LUMINANCE_INTEGER_EXT:
795 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
796 case GL_RG_INTEGER:
797 /* specific integer formats */
798 case GL_RGBA32I_EXT:
799 case GL_RGB32I_EXT:
800 case GL_RG32I:
801 case GL_R32I:
802 case GL_ALPHA32I_EXT:
803 case GL_INTENSITY32I_EXT:
804 case GL_LUMINANCE32I_EXT:
805 case GL_LUMINANCE_ALPHA32I_EXT:
806 case GL_RGBA16I_EXT:
807 case GL_RGB16I_EXT:
808 case GL_RG16I:
809 case GL_R16I:
810 case GL_ALPHA16I_EXT:
811 case GL_INTENSITY16I_EXT:
812 case GL_LUMINANCE16I_EXT:
813 case GL_LUMINANCE_ALPHA16I_EXT:
814 case GL_RGBA8I_EXT:
815 case GL_RGB8I_EXT:
816 case GL_RG8I:
817 case GL_R8I:
818 case GL_ALPHA8I_EXT:
819 case GL_INTENSITY8I_EXT:
820 case GL_LUMINANCE8I_EXT:
821 case GL_LUMINANCE_ALPHA8I_EXT:
822 return GL_TRUE;
823 default:
824 return GL_FALSE;
825 }
826 }
827
828 /**
829 * Test if the given format is an ASTC 2D format.
830 */
831 static bool
832 is_astc_2d_format(GLenum internalFormat)
833 {
834 switch (internalFormat) {
835 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
844 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
845 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
846 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
847 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
848 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
858 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
859 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
860 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
861 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
862 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
863 return true;
864 default:
865 return false;
866 }
867 }
868
869 /**
870 * Test if the given format is an ASTC 3D format.
871 */
872 static bool
873 is_astc_3d_format(GLenum internalFormat)
874 {
875 switch (internalFormat) {
876 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
877 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
878 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
879 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
880 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
881 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
882 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
883 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
884 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
885 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
886 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
887 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
888 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
889 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
890 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
891 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
892 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
893 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
894 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
895 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
896 return true;
897 default:
898 return false;
899 }
900 }
901
902 /**
903 * Test if the given format is an ASTC format.
904 */
905 GLboolean
906 _mesa_is_astc_format(GLenum internalFormat)
907 {
908 return is_astc_2d_format(internalFormat) ||
909 is_astc_3d_format(internalFormat);
910 }
911
912 /**
913 * Test if the given format is an ETC2 format.
914 */
915 GLboolean
916 _mesa_is_etc2_format(GLenum internalFormat)
917 {
918 switch (internalFormat) {
919 case GL_COMPRESSED_RGB8_ETC2:
920 case GL_COMPRESSED_SRGB8_ETC2:
921 case GL_COMPRESSED_RGBA8_ETC2_EAC:
922 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
923 case GL_COMPRESSED_R11_EAC:
924 case GL_COMPRESSED_RG11_EAC:
925 case GL_COMPRESSED_SIGNED_R11_EAC:
926 case GL_COMPRESSED_SIGNED_RG11_EAC:
927 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
928 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
929 return true;
930 default:
931 return false;
932 }
933 }
934
935 /**
936 * Test if the given format is an integer (non-normalized) format.
937 */
938 GLboolean
939 _mesa_is_enum_format_integer(GLenum format)
940 {
941 return _mesa_is_enum_format_unsigned_int(format) ||
942 _mesa_is_enum_format_signed_int(format);
943 }
944
945
946 GLboolean
947 _mesa_is_type_unsigned(GLenum type)
948 {
949 switch (type) {
950 case GL_UNSIGNED_INT:
951 case GL_UNSIGNED_INT_8_8_8_8:
952 case GL_UNSIGNED_INT_8_8_8_8_REV:
953 case GL_UNSIGNED_INT_10_10_10_2:
954 case GL_UNSIGNED_INT_2_10_10_10_REV:
955
956 case GL_UNSIGNED_SHORT:
957 case GL_UNSIGNED_SHORT_4_4_4_4:
958 case GL_UNSIGNED_SHORT_5_5_5_1:
959 case GL_UNSIGNED_SHORT_5_6_5:
960 case GL_UNSIGNED_SHORT_5_6_5_REV:
961 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
962 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
963 case GL_UNSIGNED_SHORT_8_8_MESA:
964 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
965
966 case GL_UNSIGNED_BYTE:
967 case GL_UNSIGNED_BYTE_3_3_2:
968 case GL_UNSIGNED_BYTE_2_3_3_REV:
969 return GL_TRUE;
970
971 default:
972 return GL_FALSE;
973 }
974 }
975
976
977 /**
978 * Test if the given image format is a color/RGBA format (i.e., not color
979 * index, depth, stencil, etc).
980 * \param format the image format value (may by an internal texture format)
981 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
982 */
983 GLboolean
984 _mesa_is_color_format(GLenum format)
985 {
986 switch (format) {
987 case GL_RED:
988 case GL_GREEN:
989 case GL_BLUE:
990 case GL_ALPHA:
991 case GL_ALPHA4:
992 case GL_ALPHA8:
993 case GL_ALPHA12:
994 case GL_ALPHA16:
995 case 1:
996 case GL_LUMINANCE:
997 case GL_LUMINANCE4:
998 case GL_LUMINANCE8:
999 case GL_LUMINANCE12:
1000 case GL_LUMINANCE16:
1001 case 2:
1002 case GL_LUMINANCE_ALPHA:
1003 case GL_LUMINANCE4_ALPHA4:
1004 case GL_LUMINANCE6_ALPHA2:
1005 case GL_LUMINANCE8_ALPHA8:
1006 case GL_LUMINANCE12_ALPHA4:
1007 case GL_LUMINANCE12_ALPHA12:
1008 case GL_LUMINANCE16_ALPHA16:
1009 case GL_INTENSITY:
1010 case GL_INTENSITY4:
1011 case GL_INTENSITY8:
1012 case GL_INTENSITY12:
1013 case GL_INTENSITY16:
1014 case GL_R8:
1015 case GL_R16:
1016 case GL_RG:
1017 case GL_RG8:
1018 case GL_RG16:
1019 case 3:
1020 case GL_RGB:
1021 case GL_BGR:
1022 case GL_R3_G3_B2:
1023 case GL_RGB4:
1024 case GL_RGB5:
1025 case GL_RGB565:
1026 case GL_RGB8:
1027 case GL_RGB10:
1028 case GL_RGB12:
1029 case GL_RGB16:
1030 case 4:
1031 case GL_ABGR_EXT:
1032 case GL_RGBA:
1033 case GL_BGRA:
1034 case GL_RGBA2:
1035 case GL_RGBA4:
1036 case GL_RGB5_A1:
1037 case GL_RGBA8:
1038 case GL_RGB10_A2:
1039 case GL_RGBA12:
1040 case GL_RGBA16:
1041 /* float texture formats */
1042 case GL_ALPHA16F_ARB:
1043 case GL_ALPHA32F_ARB:
1044 case GL_LUMINANCE16F_ARB:
1045 case GL_LUMINANCE32F_ARB:
1046 case GL_LUMINANCE_ALPHA16F_ARB:
1047 case GL_LUMINANCE_ALPHA32F_ARB:
1048 case GL_INTENSITY16F_ARB:
1049 case GL_INTENSITY32F_ARB:
1050 case GL_R16F:
1051 case GL_R32F:
1052 case GL_RG16F:
1053 case GL_RG32F:
1054 case GL_RGB16F_ARB:
1055 case GL_RGB32F_ARB:
1056 case GL_RGBA16F_ARB:
1057 case GL_RGBA32F_ARB:
1058 /* compressed formats */
1059 case GL_COMPRESSED_ALPHA:
1060 case GL_COMPRESSED_LUMINANCE:
1061 case GL_COMPRESSED_LUMINANCE_ALPHA:
1062 case GL_COMPRESSED_INTENSITY:
1063 case GL_COMPRESSED_RED:
1064 case GL_COMPRESSED_RG:
1065 case GL_COMPRESSED_RGB:
1066 case GL_COMPRESSED_RGBA:
1067 case GL_RGB_S3TC:
1068 case GL_RGB4_S3TC:
1069 case GL_RGBA_S3TC:
1070 case GL_RGBA4_S3TC:
1071 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1072 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1073 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1074 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1075 case GL_COMPRESSED_RGB_FXT1_3DFX:
1076 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1077 case GL_SRGB_EXT:
1078 case GL_SRGB8_EXT:
1079 case GL_SRGB_ALPHA_EXT:
1080 case GL_SRGB8_ALPHA8_EXT:
1081 case GL_SLUMINANCE_ALPHA_EXT:
1082 case GL_SLUMINANCE8_ALPHA8_EXT:
1083 case GL_SLUMINANCE_EXT:
1084 case GL_SLUMINANCE8_EXT:
1085 case GL_COMPRESSED_SRGB_EXT:
1086 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1087 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1088 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1089 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1090 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1091 case GL_COMPRESSED_SLUMINANCE_EXT:
1092 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1093 case GL_COMPRESSED_RED_RGTC1:
1094 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1095 case GL_COMPRESSED_RG_RGTC2:
1096 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1097 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1098 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1099 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1100 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1101 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1102 case GL_ETC1_RGB8_OES:
1103 case GL_COMPRESSED_RGB8_ETC2:
1104 case GL_COMPRESSED_SRGB8_ETC2:
1105 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1106 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1107 case GL_COMPRESSED_R11_EAC:
1108 case GL_COMPRESSED_RG11_EAC:
1109 case GL_COMPRESSED_SIGNED_R11_EAC:
1110 case GL_COMPRESSED_SIGNED_RG11_EAC:
1111 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1112 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1113 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1114 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1115 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1116 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1117 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1118 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1119 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1120 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1121 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1122 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1123 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1124 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1125 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1126 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1127 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1128 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1129 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1130 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1131 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1132 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1133 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1134 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1135 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1136 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1137 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1138 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1139 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1140 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1141 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1142 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1143 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1144 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1145 /* generic integer formats */
1146 case GL_RED_INTEGER_EXT:
1147 case GL_GREEN_INTEGER_EXT:
1148 case GL_BLUE_INTEGER_EXT:
1149 case GL_ALPHA_INTEGER_EXT:
1150 case GL_RGB_INTEGER_EXT:
1151 case GL_RGBA_INTEGER_EXT:
1152 case GL_BGR_INTEGER_EXT:
1153 case GL_BGRA_INTEGER_EXT:
1154 case GL_RG_INTEGER:
1155 case GL_LUMINANCE_INTEGER_EXT:
1156 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1157 /* sized integer formats */
1158 case GL_RGBA32UI_EXT:
1159 case GL_RGB32UI_EXT:
1160 case GL_RG32UI:
1161 case GL_R32UI:
1162 case GL_ALPHA32UI_EXT:
1163 case GL_INTENSITY32UI_EXT:
1164 case GL_LUMINANCE32UI_EXT:
1165 case GL_LUMINANCE_ALPHA32UI_EXT:
1166 case GL_RGBA16UI_EXT:
1167 case GL_RGB16UI_EXT:
1168 case GL_RG16UI:
1169 case GL_R16UI:
1170 case GL_ALPHA16UI_EXT:
1171 case GL_INTENSITY16UI_EXT:
1172 case GL_LUMINANCE16UI_EXT:
1173 case GL_LUMINANCE_ALPHA16UI_EXT:
1174 case GL_RGBA8UI_EXT:
1175 case GL_RGB8UI_EXT:
1176 case GL_RG8UI:
1177 case GL_R8UI:
1178 case GL_ALPHA8UI_EXT:
1179 case GL_INTENSITY8UI_EXT:
1180 case GL_LUMINANCE8UI_EXT:
1181 case GL_LUMINANCE_ALPHA8UI_EXT:
1182 case GL_RGBA32I_EXT:
1183 case GL_RGB32I_EXT:
1184 case GL_RG32I:
1185 case GL_R32I:
1186 case GL_ALPHA32I_EXT:
1187 case GL_INTENSITY32I_EXT:
1188 case GL_LUMINANCE32I_EXT:
1189 case GL_LUMINANCE_ALPHA32I_EXT:
1190 case GL_RGBA16I_EXT:
1191 case GL_RGB16I_EXT:
1192 case GL_RG16I:
1193 case GL_R16I:
1194 case GL_ALPHA16I_EXT:
1195 case GL_INTENSITY16I_EXT:
1196 case GL_LUMINANCE16I_EXT:
1197 case GL_LUMINANCE_ALPHA16I_EXT:
1198 case GL_RGBA8I_EXT:
1199 case GL_RGB8I_EXT:
1200 case GL_RG8I:
1201 case GL_R8I:
1202 case GL_ALPHA8I_EXT:
1203 case GL_INTENSITY8I_EXT:
1204 case GL_LUMINANCE8I_EXT:
1205 case GL_LUMINANCE_ALPHA8I_EXT:
1206 /* signed, normalized texture formats */
1207 case GL_RED_SNORM:
1208 case GL_R8_SNORM:
1209 case GL_R16_SNORM:
1210 case GL_RG_SNORM:
1211 case GL_RG8_SNORM:
1212 case GL_RG16_SNORM:
1213 case GL_RGB_SNORM:
1214 case GL_RGB8_SNORM:
1215 case GL_RGB16_SNORM:
1216 case GL_RGBA_SNORM:
1217 case GL_RGBA8_SNORM:
1218 case GL_RGBA16_SNORM:
1219 case GL_ALPHA_SNORM:
1220 case GL_ALPHA8_SNORM:
1221 case GL_ALPHA16_SNORM:
1222 case GL_LUMINANCE_SNORM:
1223 case GL_LUMINANCE8_SNORM:
1224 case GL_LUMINANCE16_SNORM:
1225 case GL_LUMINANCE_ALPHA_SNORM:
1226 case GL_LUMINANCE8_ALPHA8_SNORM:
1227 case GL_LUMINANCE16_ALPHA16_SNORM:
1228 case GL_INTENSITY_SNORM:
1229 case GL_INTENSITY8_SNORM:
1230 case GL_INTENSITY16_SNORM:
1231 case GL_RGB9_E5:
1232 case GL_R11F_G11F_B10F:
1233 case GL_RGB10_A2UI:
1234 return GL_TRUE;
1235 case GL_YCBCR_MESA: /* not considered to be RGB */
1236 /* fall-through */
1237 default:
1238 return GL_FALSE;
1239 }
1240 }
1241
1242
1243 /**
1244 * Test if the given image format is a depth component format.
1245 */
1246 GLboolean
1247 _mesa_is_depth_format(GLenum format)
1248 {
1249 switch (format) {
1250 case GL_DEPTH_COMPONENT:
1251 case GL_DEPTH_COMPONENT16:
1252 case GL_DEPTH_COMPONENT24:
1253 case GL_DEPTH_COMPONENT32:
1254 case GL_DEPTH_COMPONENT32F:
1255 return GL_TRUE;
1256 default:
1257 return GL_FALSE;
1258 }
1259 }
1260
1261
1262 /**
1263 * Test if the given image format is a stencil format.
1264 */
1265 GLboolean
1266 _mesa_is_stencil_format(GLenum format)
1267 {
1268 switch (format) {
1269 case GL_STENCIL_INDEX:
1270 return GL_TRUE;
1271 default:
1272 return GL_FALSE;
1273 }
1274 }
1275
1276
1277 /**
1278 * Test if the given image format is a YCbCr format.
1279 */
1280 GLboolean
1281 _mesa_is_ycbcr_format(GLenum format)
1282 {
1283 switch (format) {
1284 case GL_YCBCR_MESA:
1285 return GL_TRUE;
1286 default:
1287 return GL_FALSE;
1288 }
1289 }
1290
1291
1292 /**
1293 * Test if the given image format is a depth+stencil format.
1294 */
1295 GLboolean
1296 _mesa_is_depthstencil_format(GLenum format)
1297 {
1298 switch (format) {
1299 case GL_DEPTH24_STENCIL8_EXT:
1300 case GL_DEPTH_STENCIL_EXT:
1301 case GL_DEPTH32F_STENCIL8:
1302 return GL_TRUE;
1303 default:
1304 return GL_FALSE;
1305 }
1306 }
1307
1308
1309 /**
1310 * Test if the given image format is a depth or stencil format.
1311 */
1312 GLboolean
1313 _mesa_is_depth_or_stencil_format(GLenum format)
1314 {
1315 switch (format) {
1316 case GL_DEPTH_COMPONENT:
1317 case GL_DEPTH_COMPONENT16:
1318 case GL_DEPTH_COMPONENT24:
1319 case GL_DEPTH_COMPONENT32:
1320 case GL_STENCIL_INDEX:
1321 case GL_STENCIL_INDEX1_EXT:
1322 case GL_STENCIL_INDEX4_EXT:
1323 case GL_STENCIL_INDEX8_EXT:
1324 case GL_STENCIL_INDEX16_EXT:
1325 case GL_DEPTH_STENCIL_EXT:
1326 case GL_DEPTH24_STENCIL8_EXT:
1327 case GL_DEPTH_COMPONENT32F:
1328 case GL_DEPTH32F_STENCIL8:
1329 return GL_TRUE;
1330 default:
1331 return GL_FALSE;
1332 }
1333 }
1334
1335
1336 /**
1337 * Test if an image format is a supported compressed format.
1338 * \param format the internal format token provided by the user.
1339 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1340 */
1341 GLboolean
1342 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1343 {
1344 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1345
1346 /* Some formats in this switch have an equivalent mesa_format_layout
1347 * to the compressed formats in the layout switch below and thus
1348 * must be handled first.
1349 */
1350 switch (format) {
1351 case GL_RGB_S3TC:
1352 case GL_RGB4_S3TC:
1353 case GL_RGBA_S3TC:
1354 case GL_RGBA4_S3TC:
1355 return _mesa_has_S3_s3tc(ctx);
1356 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1357 return _mesa_has_ATI_texture_compression_3dc(ctx);
1358 case GL_PALETTE4_RGB8_OES:
1359 case GL_PALETTE4_RGBA8_OES:
1360 case GL_PALETTE4_R5_G6_B5_OES:
1361 case GL_PALETTE4_RGBA4_OES:
1362 case GL_PALETTE4_RGB5_A1_OES:
1363 case GL_PALETTE8_RGB8_OES:
1364 case GL_PALETTE8_RGBA8_OES:
1365 case GL_PALETTE8_R5_G6_B5_OES:
1366 case GL_PALETTE8_RGBA4_OES:
1367 case GL_PALETTE8_RGB5_A1_OES:
1368 return ctx->API == API_OPENGLES;
1369 }
1370
1371 switch (_mesa_get_format_layout(m_format)) {
1372 case MESA_FORMAT_LAYOUT_S3TC:
1373 if (_mesa_get_format_color_encoding(m_format) == GL_LINEAR) {
1374 return _mesa_has_EXT_texture_compression_s3tc(ctx);
1375 } else {
1376 return _mesa_has_EXT_texture_sRGB(ctx) &&
1377 _mesa_has_EXT_texture_compression_s3tc(ctx);
1378 }
1379 case MESA_FORMAT_LAYOUT_FXT1:
1380 return _mesa_has_3DFX_texture_compression_FXT1(ctx);
1381 case MESA_FORMAT_LAYOUT_RGTC:
1382 return _mesa_has_ARB_texture_compression_rgtc(ctx);
1383 case MESA_FORMAT_LAYOUT_LATC:
1384 return _mesa_has_EXT_texture_compression_latc(ctx);
1385 case MESA_FORMAT_LAYOUT_ETC1:
1386 return _mesa_has_OES_compressed_ETC1_RGB8_texture(ctx);
1387 case MESA_FORMAT_LAYOUT_ETC2:
1388 return _mesa_is_gles3(ctx) || _mesa_has_ARB_ES3_compatibility(ctx);
1389 case MESA_FORMAT_LAYOUT_BPTC:
1390 return _mesa_has_ARB_texture_compression_bptc(ctx);
1391 case MESA_FORMAT_LAYOUT_ASTC:
1392 return _mesa_has_KHR_texture_compression_astc_ldr(ctx);
1393 default:
1394 return GL_FALSE;
1395 }
1396 }
1397
1398 /**
1399 * Test if the given format represents an sRGB format.
1400 * \param format the GL format (can be an internal format)
1401 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1402 */
1403 GLboolean
1404 _mesa_is_srgb_format(GLenum format)
1405 {
1406 switch (format) {
1407 case GL_SRGB:
1408 case GL_SRGB8:
1409 case GL_SRGB_ALPHA:
1410 case GL_SRGB8_ALPHA8:
1411 case GL_COMPRESSED_SRGB:
1412 case GL_COMPRESSED_SRGB_ALPHA:
1413 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1414 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1415 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1416 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1417 case GL_COMPRESSED_SRGB8_ETC2:
1418 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1419 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1420 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1421 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1422 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1423 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1424 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1425 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1426 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1427 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1428 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1429 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1430 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1431 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1432 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1433 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1434 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1435 return GL_TRUE;
1436 default:
1437 break;
1438 }
1439
1440 return GL_FALSE;
1441 }
1442
1443 /**
1444 * Convert various unpack formats to the corresponding base format.
1445 */
1446 GLenum
1447 _mesa_unpack_format_to_base_format(GLenum format)
1448 {
1449 switch(format) {
1450 case GL_RED_INTEGER:
1451 return GL_RED;
1452 case GL_GREEN_INTEGER:
1453 return GL_GREEN;
1454 case GL_BLUE_INTEGER:
1455 return GL_BLUE;
1456 case GL_ALPHA_INTEGER:
1457 return GL_ALPHA;
1458 case GL_RG_INTEGER:
1459 return GL_RG;
1460 case GL_RGB_INTEGER:
1461 return GL_RGB;
1462 case GL_RGBA_INTEGER:
1463 return GL_RGBA;
1464 case GL_BGR_INTEGER:
1465 return GL_BGR;
1466 case GL_BGRA_INTEGER:
1467 return GL_BGRA;
1468 case GL_LUMINANCE_INTEGER_EXT:
1469 return GL_LUMINANCE;
1470 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1471 return GL_LUMINANCE_ALPHA;
1472 case GL_RED:
1473 case GL_GREEN:
1474 case GL_BLUE:
1475 case GL_RG:
1476 case GL_RGB:
1477 case GL_RGBA:
1478 case GL_BGR:
1479 case GL_BGRA:
1480 case GL_ALPHA:
1481 case GL_LUMINANCE:
1482 case GL_LUMINANCE_ALPHA:
1483 default:
1484 return format;
1485 }
1486 }
1487
1488 /**
1489 * Convert various base formats to the corresponding integer format.
1490 */
1491 GLenum
1492 _mesa_base_format_to_integer_format(GLenum format)
1493 {
1494 switch(format) {
1495 case GL_RED:
1496 return GL_RED_INTEGER;
1497 case GL_GREEN:
1498 return GL_GREEN_INTEGER;
1499 case GL_BLUE:
1500 return GL_BLUE_INTEGER;
1501 case GL_RG:
1502 return GL_RG_INTEGER;
1503 case GL_RGB:
1504 return GL_RGB_INTEGER;
1505 case GL_RGBA:
1506 return GL_RGBA_INTEGER;
1507 case GL_BGR:
1508 return GL_BGR_INTEGER;
1509 case GL_BGRA:
1510 return GL_BGRA_INTEGER;
1511 case GL_ALPHA:
1512 return GL_ALPHA_INTEGER;
1513 case GL_LUMINANCE:
1514 return GL_LUMINANCE_INTEGER_EXT;
1515 case GL_LUMINANCE_ALPHA:
1516 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1517 }
1518
1519 return format;
1520 }
1521
1522
1523 /**
1524 * Does the given base texture/renderbuffer format have the channel
1525 * named by 'pname'?
1526 */
1527 GLboolean
1528 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1529 {
1530 switch (pname) {
1531 case GL_TEXTURE_RED_SIZE:
1532 case GL_TEXTURE_RED_TYPE:
1533 case GL_RENDERBUFFER_RED_SIZE_EXT:
1534 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1535 case GL_INTERNALFORMAT_RED_SIZE:
1536 case GL_INTERNALFORMAT_RED_TYPE:
1537 if (base_format == GL_RED ||
1538 base_format == GL_RG ||
1539 base_format == GL_RGB ||
1540 base_format == GL_RGBA) {
1541 return GL_TRUE;
1542 }
1543 return GL_FALSE;
1544 case GL_TEXTURE_GREEN_SIZE:
1545 case GL_TEXTURE_GREEN_TYPE:
1546 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1547 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1548 case GL_INTERNALFORMAT_GREEN_SIZE:
1549 case GL_INTERNALFORMAT_GREEN_TYPE:
1550 if (base_format == GL_RG ||
1551 base_format == GL_RGB ||
1552 base_format == GL_RGBA) {
1553 return GL_TRUE;
1554 }
1555 return GL_FALSE;
1556 case GL_TEXTURE_BLUE_SIZE:
1557 case GL_TEXTURE_BLUE_TYPE:
1558 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1559 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1560 case GL_INTERNALFORMAT_BLUE_SIZE:
1561 case GL_INTERNALFORMAT_BLUE_TYPE:
1562 if (base_format == GL_RGB ||
1563 base_format == GL_RGBA) {
1564 return GL_TRUE;
1565 }
1566 return GL_FALSE;
1567 case GL_TEXTURE_ALPHA_SIZE:
1568 case GL_TEXTURE_ALPHA_TYPE:
1569 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1570 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1571 case GL_INTERNALFORMAT_ALPHA_SIZE:
1572 case GL_INTERNALFORMAT_ALPHA_TYPE:
1573 if (base_format == GL_RGBA ||
1574 base_format == GL_ALPHA ||
1575 base_format == GL_LUMINANCE_ALPHA) {
1576 return GL_TRUE;
1577 }
1578 return GL_FALSE;
1579 case GL_TEXTURE_LUMINANCE_SIZE:
1580 case GL_TEXTURE_LUMINANCE_TYPE:
1581 if (base_format == GL_LUMINANCE ||
1582 base_format == GL_LUMINANCE_ALPHA) {
1583 return GL_TRUE;
1584 }
1585 return GL_FALSE;
1586 case GL_TEXTURE_INTENSITY_SIZE:
1587 case GL_TEXTURE_INTENSITY_TYPE:
1588 if (base_format == GL_INTENSITY) {
1589 return GL_TRUE;
1590 }
1591 return GL_FALSE;
1592 case GL_TEXTURE_DEPTH_SIZE:
1593 case GL_TEXTURE_DEPTH_TYPE:
1594 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1595 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1596 case GL_INTERNALFORMAT_DEPTH_SIZE:
1597 case GL_INTERNALFORMAT_DEPTH_TYPE:
1598 if (base_format == GL_DEPTH_STENCIL ||
1599 base_format == GL_DEPTH_COMPONENT) {
1600 return GL_TRUE;
1601 }
1602 return GL_FALSE;
1603 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1604 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1605 case GL_INTERNALFORMAT_STENCIL_SIZE:
1606 case GL_INTERNALFORMAT_STENCIL_TYPE:
1607 if (base_format == GL_DEPTH_STENCIL ||
1608 base_format == GL_STENCIL_INDEX) {
1609 return GL_TRUE;
1610 }
1611 return GL_FALSE;
1612 default:
1613 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1614 __func__, pname);
1615 return GL_FALSE;
1616 }
1617
1618 return GL_FALSE;
1619 }
1620
1621
1622 /**
1623 * If format is a generic compressed format, return the corresponding
1624 * non-compressed format. For other formats, return the format as-is.
1625 */
1626 GLenum
1627 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1628 {
1629 switch (format) {
1630 case GL_COMPRESSED_RED:
1631 return GL_RED;
1632 case GL_COMPRESSED_RG:
1633 return GL_RG;
1634 case GL_COMPRESSED_RGB:
1635 return GL_RGB;
1636 case GL_COMPRESSED_RGBA:
1637 return GL_RGBA;
1638 case GL_COMPRESSED_ALPHA:
1639 return GL_ALPHA;
1640 case GL_COMPRESSED_LUMINANCE:
1641 return GL_LUMINANCE;
1642 case GL_COMPRESSED_LUMINANCE_ALPHA:
1643 return GL_LUMINANCE_ALPHA;
1644 case GL_COMPRESSED_INTENSITY:
1645 return GL_INTENSITY;
1646 /* sRGB formats */
1647 case GL_COMPRESSED_SRGB:
1648 return GL_SRGB;
1649 case GL_COMPRESSED_SRGB_ALPHA:
1650 return GL_SRGB_ALPHA;
1651 case GL_COMPRESSED_SLUMINANCE:
1652 return GL_SLUMINANCE;
1653 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1654 return GL_SLUMINANCE_ALPHA;
1655 default:
1656 return format;
1657 }
1658 }
1659
1660
1661 /**
1662 * Return the equivalent non-generic internal format.
1663 * This is useful for comparing whether two internal formats are equivalent.
1664 */
1665 GLenum
1666 _mesa_get_nongeneric_internalformat(GLenum format)
1667 {
1668 switch (format) {
1669 /* GL 1.1 formats. */
1670 case 4:
1671 case GL_RGBA:
1672 return GL_RGBA8;
1673 case 3:
1674 case GL_RGB:
1675 return GL_RGB8;
1676 case 2:
1677 case GL_LUMINANCE_ALPHA:
1678 return GL_LUMINANCE8_ALPHA8;
1679 case 1:
1680 case GL_LUMINANCE:
1681 return GL_LUMINANCE8;
1682 case GL_ALPHA:
1683 return GL_ALPHA8;
1684 case GL_INTENSITY:
1685 return GL_INTENSITY8;
1686
1687 /* GL_ARB_texture_rg */
1688 case GL_RED:
1689 return GL_R8;
1690 case GL_RG:
1691 return GL_RG8;
1692
1693 /* GL_EXT_texture_sRGB */
1694 case GL_SRGB:
1695 return GL_SRGB8;
1696 case GL_SRGB_ALPHA:
1697 return GL_SRGB8_ALPHA8;
1698 case GL_SLUMINANCE:
1699 return GL_SLUMINANCE8;
1700 case GL_SLUMINANCE_ALPHA:
1701 return GL_SLUMINANCE8_ALPHA8;
1702
1703 /* GL_EXT_texture_snorm */
1704 case GL_RGBA_SNORM:
1705 return GL_RGBA8_SNORM;
1706 case GL_RGB_SNORM:
1707 return GL_RGB8_SNORM;
1708 case GL_RG_SNORM:
1709 return GL_RG8_SNORM;
1710 case GL_RED_SNORM:
1711 return GL_R8_SNORM;
1712 case GL_LUMINANCE_ALPHA_SNORM:
1713 return GL_LUMINANCE8_ALPHA8_SNORM;
1714 case GL_LUMINANCE_SNORM:
1715 return GL_LUMINANCE8_SNORM;
1716 case GL_ALPHA_SNORM:
1717 return GL_ALPHA8_SNORM;
1718 case GL_INTENSITY_SNORM:
1719 return GL_INTENSITY8_SNORM;
1720
1721 default:
1722 return format;
1723 }
1724 }
1725
1726
1727 /**
1728 * Convert an sRGB internal format to linear.
1729 */
1730 GLenum
1731 _mesa_get_linear_internalformat(GLenum format)
1732 {
1733 switch (format) {
1734 case GL_SRGB:
1735 return GL_RGB;
1736 case GL_SRGB_ALPHA:
1737 return GL_RGBA;
1738 case GL_SRGB8:
1739 return GL_RGB8;
1740 case GL_SRGB8_ALPHA8:
1741 return GL_RGBA8;
1742 case GL_SLUMINANCE8:
1743 return GL_LUMINANCE8;
1744 case GL_SLUMINANCE:
1745 return GL_LUMINANCE;
1746 case GL_SLUMINANCE_ALPHA:
1747 return GL_LUMINANCE_ALPHA;
1748 case GL_SLUMINANCE8_ALPHA8:
1749 return GL_LUMINANCE8_ALPHA8;
1750 default:
1751 return format;
1752 }
1753 }
1754
1755
1756 /**
1757 * Do error checking of format/type combinations for glReadPixels,
1758 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1759 * and type values, we may either generate GL_INVALID_OPERATION or
1760 * GL_INVALID_ENUM.
1761 *
1762 * \param format pixel format.
1763 * \param type pixel type.
1764 *
1765 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1766 */
1767 GLenum
1768 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1769 GLenum format, GLenum type)
1770 {
1771 /* From OpenGL 3.3 spec, page 220:
1772 * "If the format is DEPTH_STENCIL, then values are taken from
1773 * both the depth buffer and the stencil buffer. If there is no
1774 * depth buffer or if there is no stencil buffer, then the error
1775 * INVALID_OPERATION occurs. If the type parameter is not
1776 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1777 * error INVALID_ENUM occurs."
1778 *
1779 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1780 * cannot be used to read depth or stencil in that API.
1781 */
1782 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1783 && type != GL_UNSIGNED_INT_24_8
1784 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1785 return GL_INVALID_ENUM;
1786
1787 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1788 switch (type) {
1789 case GL_BITMAP:
1790 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1791 return GL_INVALID_ENUM;
1792 }
1793 break;
1794
1795 case GL_UNSIGNED_BYTE_3_3_2:
1796 case GL_UNSIGNED_BYTE_2_3_3_REV:
1797 case GL_UNSIGNED_SHORT_5_6_5:
1798 case GL_UNSIGNED_SHORT_5_6_5_REV:
1799 if (format == GL_RGB) {
1800 break; /* OK */
1801 }
1802 if (format == GL_RGB_INTEGER_EXT &&
1803 _mesa_has_texture_rgb10_a2ui(ctx)) {
1804 break; /* OK */
1805 }
1806 return GL_INVALID_OPERATION;
1807
1808 case GL_UNSIGNED_SHORT_4_4_4_4:
1809 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1810 case GL_UNSIGNED_INT_8_8_8_8:
1811 case GL_UNSIGNED_INT_8_8_8_8_REV:
1812 if (format == GL_RGBA ||
1813 format == GL_BGRA ||
1814 format == GL_ABGR_EXT) {
1815 break; /* OK */
1816 }
1817 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1818 _mesa_has_texture_rgb10_a2ui(ctx)) {
1819 break; /* OK */
1820 }
1821 return GL_INVALID_OPERATION;
1822
1823 case GL_UNSIGNED_SHORT_5_5_5_1:
1824 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1825 case GL_UNSIGNED_INT_10_10_10_2:
1826 case GL_UNSIGNED_INT_2_10_10_10_REV:
1827 if (format == GL_RGBA ||
1828 format == GL_BGRA) {
1829 break; /* OK */
1830 }
1831 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1832 _mesa_has_texture_rgb10_a2ui(ctx)) {
1833 break; /* OK */
1834 }
1835 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1836 ctx->API == API_OPENGLES2) {
1837 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1838 }
1839 return GL_INVALID_OPERATION;
1840
1841 case GL_UNSIGNED_INT_24_8:
1842 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1843 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1844 return GL_NO_ERROR;
1845
1846 if (format != GL_DEPTH_STENCIL) {
1847 return GL_INVALID_OPERATION;
1848 }
1849 return GL_NO_ERROR;
1850
1851 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1852 if (!_mesa_has_float_depth_buffer(ctx)) {
1853 return GL_INVALID_ENUM;
1854 }
1855 if (format != GL_DEPTH_STENCIL) {
1856 return GL_INVALID_OPERATION;
1857 }
1858 return GL_NO_ERROR;
1859
1860 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1861 if (!_mesa_has_packed_float(ctx)) {
1862 return GL_INVALID_ENUM;
1863 }
1864 if (format != GL_RGB) {
1865 return GL_INVALID_OPERATION;
1866 }
1867 return GL_NO_ERROR;
1868
1869 case GL_HALF_FLOAT_OES:
1870 switch (format) {
1871 case GL_RGBA:
1872 case GL_RGB:
1873 case GL_LUMINANCE_ALPHA:
1874 case GL_LUMINANCE:
1875 case GL_ALPHA:
1876 return GL_NO_ERROR;
1877 case GL_RG:
1878 case GL_RED:
1879 if (_mesa_has_rg_textures(ctx))
1880 return GL_NO_ERROR;
1881 default:
1882 return GL_INVALID_OPERATION;
1883 }
1884
1885 default:
1886 ; /* fall-through */
1887 }
1888
1889 /* now, for each format, check the type for compatibility */
1890 switch (format) {
1891 case GL_COLOR_INDEX:
1892 case GL_STENCIL_INDEX:
1893 switch (type) {
1894 case GL_BITMAP:
1895 case GL_BYTE:
1896 case GL_UNSIGNED_BYTE:
1897 case GL_SHORT:
1898 case GL_UNSIGNED_SHORT:
1899 case GL_INT:
1900 case GL_UNSIGNED_INT:
1901 case GL_FLOAT:
1902 case GL_HALF_FLOAT:
1903 return GL_NO_ERROR;
1904 default:
1905 return GL_INVALID_ENUM;
1906 }
1907
1908 case GL_RED:
1909 case GL_GREEN:
1910 case GL_BLUE:
1911 case GL_ALPHA:
1912 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1913 case GL_INTENSITY:
1914 #endif
1915 case GL_LUMINANCE:
1916 case GL_LUMINANCE_ALPHA:
1917 case GL_DEPTH_COMPONENT:
1918 switch (type) {
1919 case GL_BYTE:
1920 case GL_UNSIGNED_BYTE:
1921 case GL_SHORT:
1922 case GL_UNSIGNED_SHORT:
1923 case GL_INT:
1924 case GL_UNSIGNED_INT:
1925 case GL_FLOAT:
1926 case GL_HALF_FLOAT:
1927 return GL_NO_ERROR;
1928 default:
1929 return GL_INVALID_ENUM;
1930 }
1931
1932 case GL_RG:
1933 if (!_mesa_has_rg_textures(ctx))
1934 return GL_INVALID_ENUM;
1935 switch (type) {
1936 case GL_BYTE:
1937 case GL_UNSIGNED_BYTE:
1938 case GL_SHORT:
1939 case GL_UNSIGNED_SHORT:
1940 case GL_INT:
1941 case GL_UNSIGNED_INT:
1942 case GL_FLOAT:
1943 case GL_HALF_FLOAT:
1944 return GL_NO_ERROR;
1945 default:
1946 return GL_INVALID_ENUM;
1947 }
1948
1949 case GL_RGB:
1950 switch (type) {
1951 case GL_BYTE:
1952 case GL_UNSIGNED_BYTE:
1953 case GL_SHORT:
1954 case GL_UNSIGNED_SHORT:
1955 case GL_INT:
1956 case GL_UNSIGNED_INT:
1957 case GL_FLOAT:
1958 case GL_UNSIGNED_BYTE_3_3_2:
1959 case GL_UNSIGNED_BYTE_2_3_3_REV:
1960 case GL_UNSIGNED_SHORT_5_6_5:
1961 case GL_UNSIGNED_SHORT_5_6_5_REV:
1962 case GL_HALF_FLOAT:
1963 return GL_NO_ERROR;
1964 case GL_UNSIGNED_INT_2_10_10_10_REV:
1965 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1966 return (ctx->API == API_OPENGLES2)
1967 ? GL_NO_ERROR : GL_INVALID_ENUM;
1968 case GL_UNSIGNED_INT_5_9_9_9_REV:
1969 return _mesa_has_texture_shared_exponent(ctx)
1970 ? GL_NO_ERROR : GL_INVALID_ENUM;
1971 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1972 return _mesa_has_packed_float(ctx)
1973 ? GL_NO_ERROR : GL_INVALID_ENUM;
1974 default:
1975 return GL_INVALID_ENUM;
1976 }
1977
1978 case GL_BGR:
1979 switch (type) {
1980 /* NOTE: no packed types are supported with BGR. That's
1981 * intentional, according to the GL spec.
1982 */
1983 case GL_BYTE:
1984 case GL_UNSIGNED_BYTE:
1985 case GL_SHORT:
1986 case GL_UNSIGNED_SHORT:
1987 case GL_INT:
1988 case GL_UNSIGNED_INT:
1989 case GL_FLOAT:
1990 case GL_HALF_FLOAT:
1991 return GL_NO_ERROR;
1992 default:
1993 return GL_INVALID_ENUM;
1994 }
1995
1996 case GL_RGBA:
1997 case GL_BGRA:
1998 switch (type) {
1999 case GL_BYTE:
2000 case GL_UNSIGNED_BYTE:
2001 case GL_SHORT:
2002 case GL_UNSIGNED_SHORT:
2003 case GL_INT:
2004 case GL_UNSIGNED_INT:
2005 case GL_FLOAT:
2006 case GL_UNSIGNED_SHORT_4_4_4_4:
2007 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2008 case GL_UNSIGNED_SHORT_5_5_5_1:
2009 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2010 case GL_UNSIGNED_INT_8_8_8_8:
2011 case GL_UNSIGNED_INT_8_8_8_8_REV:
2012 case GL_UNSIGNED_INT_10_10_10_2:
2013 case GL_UNSIGNED_INT_2_10_10_10_REV:
2014 case GL_HALF_FLOAT:
2015 return GL_NO_ERROR;
2016 default:
2017 return GL_INVALID_ENUM;
2018 }
2019
2020 case GL_ABGR_EXT:
2021 switch (type) {
2022 case GL_BYTE:
2023 case GL_UNSIGNED_BYTE:
2024 case GL_SHORT:
2025 case GL_UNSIGNED_SHORT:
2026 case GL_INT:
2027 case GL_UNSIGNED_INT:
2028 case GL_FLOAT:
2029 case GL_UNSIGNED_SHORT_4_4_4_4:
2030 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2031 case GL_UNSIGNED_INT_8_8_8_8:
2032 case GL_UNSIGNED_INT_8_8_8_8_REV:
2033 case GL_HALF_FLOAT:
2034 return GL_NO_ERROR;
2035 default:
2036 return GL_INVALID_ENUM;
2037 }
2038
2039 case GL_YCBCR_MESA:
2040 if (!_mesa_has_MESA_ycbcr_texture(ctx))
2041 return GL_INVALID_ENUM;
2042 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2043 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2044 return GL_NO_ERROR;
2045 else
2046 return GL_INVALID_OPERATION;
2047
2048 case GL_DEPTH_STENCIL:
2049 if (type == GL_UNSIGNED_INT_24_8)
2050 return GL_NO_ERROR;
2051 else if (_mesa_has_float_depth_buffer(ctx) &&
2052 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2053 return GL_NO_ERROR;
2054 else
2055 return GL_INVALID_ENUM;
2056
2057 /* integer-valued formats */
2058 case GL_RED_INTEGER_EXT:
2059 case GL_GREEN_INTEGER_EXT:
2060 case GL_BLUE_INTEGER_EXT:
2061 case GL_ALPHA_INTEGER_EXT:
2062 case GL_RG_INTEGER:
2063 switch (type) {
2064 case GL_BYTE:
2065 case GL_UNSIGNED_BYTE:
2066 case GL_SHORT:
2067 case GL_UNSIGNED_SHORT:
2068 case GL_INT:
2069 case GL_UNSIGNED_INT:
2070 return _mesa_has_integer_textures(ctx)
2071 ? GL_NO_ERROR : GL_INVALID_ENUM;
2072 default:
2073 return GL_INVALID_ENUM;
2074 }
2075
2076 case GL_RGB_INTEGER_EXT:
2077 switch (type) {
2078 case GL_BYTE:
2079 case GL_UNSIGNED_BYTE:
2080 case GL_SHORT:
2081 case GL_UNSIGNED_SHORT:
2082 case GL_INT:
2083 case GL_UNSIGNED_INT:
2084 return _mesa_has_integer_textures(ctx)
2085 ? GL_NO_ERROR : GL_INVALID_ENUM;
2086 case GL_UNSIGNED_BYTE_3_3_2:
2087 case GL_UNSIGNED_BYTE_2_3_3_REV:
2088 case GL_UNSIGNED_SHORT_5_6_5:
2089 case GL_UNSIGNED_SHORT_5_6_5_REV:
2090 return _mesa_has_texture_rgb10_a2ui(ctx)
2091 ? GL_NO_ERROR : GL_INVALID_ENUM;
2092 default:
2093 return GL_INVALID_ENUM;
2094 }
2095
2096 case GL_BGR_INTEGER_EXT:
2097 switch (type) {
2098 case GL_BYTE:
2099 case GL_UNSIGNED_BYTE:
2100 case GL_SHORT:
2101 case GL_UNSIGNED_SHORT:
2102 case GL_INT:
2103 case GL_UNSIGNED_INT:
2104 /* NOTE: no packed formats w/ BGR format */
2105 return _mesa_has_integer_textures(ctx)
2106 ? GL_NO_ERROR : GL_INVALID_ENUM;
2107 default:
2108 return GL_INVALID_ENUM;
2109 }
2110
2111 case GL_RGBA_INTEGER_EXT:
2112 case GL_BGRA_INTEGER_EXT:
2113 switch (type) {
2114 case GL_BYTE:
2115 case GL_UNSIGNED_BYTE:
2116 case GL_SHORT:
2117 case GL_UNSIGNED_SHORT:
2118 case GL_INT:
2119 case GL_UNSIGNED_INT:
2120 return _mesa_has_integer_textures(ctx)
2121 ? GL_NO_ERROR : GL_INVALID_ENUM;
2122 case GL_UNSIGNED_SHORT_4_4_4_4:
2123 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2124 case GL_UNSIGNED_SHORT_5_5_5_1:
2125 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2126 case GL_UNSIGNED_INT_8_8_8_8:
2127 case GL_UNSIGNED_INT_8_8_8_8_REV:
2128 case GL_UNSIGNED_INT_10_10_10_2:
2129 case GL_UNSIGNED_INT_2_10_10_10_REV:
2130 return _mesa_has_texture_rgb10_a2ui(ctx)
2131 ? GL_NO_ERROR : GL_INVALID_ENUM;
2132 default:
2133 return GL_INVALID_ENUM;
2134 }
2135
2136 case GL_LUMINANCE_INTEGER_EXT:
2137 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2138 switch (type) {
2139 case GL_BYTE:
2140 case GL_UNSIGNED_BYTE:
2141 case GL_SHORT:
2142 case GL_UNSIGNED_SHORT:
2143 case GL_INT:
2144 case GL_UNSIGNED_INT:
2145 return _mesa_has_integer_textures(ctx)
2146 ? GL_NO_ERROR : GL_INVALID_ENUM;
2147 default:
2148 return GL_INVALID_ENUM;
2149 }
2150
2151 default:
2152 return GL_INVALID_ENUM;
2153 }
2154 return GL_NO_ERROR;
2155 }
2156
2157
2158 /**
2159 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2160 * and glTex[Sub]Image.
2161 * \return error code, or GL_NO_ERROR.
2162 */
2163 GLenum
2164 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2165 GLenum format, GLenum type,
2166 unsigned dimensions)
2167 {
2168 GLboolean type_valid = GL_TRUE;
2169
2170 switch (format) {
2171 case GL_RED:
2172 case GL_RG:
2173 if (!_mesa_has_rg_textures(ctx))
2174 return GL_INVALID_VALUE;
2175 /* fallthrough */
2176 case GL_ALPHA:
2177 case GL_LUMINANCE:
2178 case GL_LUMINANCE_ALPHA:
2179 type_valid = (type == GL_UNSIGNED_BYTE
2180 || type == GL_FLOAT
2181 || type == GL_HALF_FLOAT_OES);
2182 break;
2183
2184 case GL_RGB:
2185 type_valid = (type == GL_UNSIGNED_BYTE
2186 || type == GL_UNSIGNED_SHORT_5_6_5
2187 || type == GL_FLOAT
2188 || type == GL_HALF_FLOAT_OES);
2189 break;
2190
2191 case GL_RGBA:
2192 type_valid = (type == GL_UNSIGNED_BYTE
2193 || type == GL_UNSIGNED_SHORT_4_4_4_4
2194 || type == GL_UNSIGNED_SHORT_5_5_5_1
2195 || type == GL_FLOAT
2196 || type == GL_HALF_FLOAT_OES
2197 || (_mesa_has_texture_type_2_10_10_10_REV(ctx) &&
2198 type == GL_UNSIGNED_INT_2_10_10_10_REV));
2199 break;
2200
2201 case GL_DEPTH_COMPONENT:
2202 /* This format is filtered against invalid dimensionalities elsewhere.
2203 */
2204 type_valid = (type == GL_UNSIGNED_SHORT
2205 || type == GL_UNSIGNED_INT);
2206 break;
2207
2208 case GL_DEPTH_STENCIL:
2209 /* This format is filtered against invalid dimensionalities elsewhere.
2210 */
2211 type_valid = (type == GL_UNSIGNED_INT_24_8);
2212 break;
2213
2214 case GL_BGRA_EXT:
2215 type_valid = (type == GL_UNSIGNED_BYTE);
2216
2217 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2218 * the format does not appear to be allowed for 3D textures in OpenGL
2219 * ES.
2220 */
2221 if (dimensions != 2)
2222 return GL_INVALID_VALUE;
2223
2224 break;
2225
2226 default:
2227 return GL_INVALID_VALUE;
2228 }
2229
2230 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2231 }
2232
2233 /**
2234 * Return the simple base format for a given internal texture format.
2235 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2236 *
2237 * \param ctx GL context.
2238 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2239 *
2240 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2241 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2242 *
2243 * This is the format which is used during texture application (i.e. the
2244 * texture format and env mode determine the arithmetic used.
2245 */
2246 GLint
2247 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2248 {
2249 switch (internalFormat) {
2250 case GL_ALPHA:
2251 case GL_ALPHA4:
2252 case GL_ALPHA8:
2253 case GL_ALPHA12:
2254 case GL_ALPHA16:
2255 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2256 case 1:
2257 case GL_LUMINANCE:
2258 case GL_LUMINANCE4:
2259 case GL_LUMINANCE8:
2260 case GL_LUMINANCE12:
2261 case GL_LUMINANCE16:
2262 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2263 case 2:
2264 case GL_LUMINANCE_ALPHA:
2265 case GL_LUMINANCE4_ALPHA4:
2266 case GL_LUMINANCE6_ALPHA2:
2267 case GL_LUMINANCE8_ALPHA8:
2268 case GL_LUMINANCE12_ALPHA4:
2269 case GL_LUMINANCE12_ALPHA12:
2270 case GL_LUMINANCE16_ALPHA16:
2271 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2272 case GL_INTENSITY:
2273 case GL_INTENSITY4:
2274 case GL_INTENSITY8:
2275 case GL_INTENSITY12:
2276 case GL_INTENSITY16:
2277 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2278 case 3:
2279 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2280 case GL_RGB:
2281 case GL_R3_G3_B2:
2282 case GL_RGB4:
2283 case GL_RGB5:
2284 case GL_RGB8:
2285 case GL_RGB10:
2286 case GL_RGB12:
2287 case GL_RGB16:
2288 return GL_RGB;
2289 case 4:
2290 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2291 case GL_RGBA:
2292 case GL_RGBA2:
2293 case GL_RGBA4:
2294 case GL_RGB5_A1:
2295 case GL_RGBA8:
2296 case GL_RGB10_A2:
2297 case GL_RGBA12:
2298 case GL_RGBA16:
2299 return GL_RGBA;
2300 default:
2301 ; /* fallthrough */
2302 }
2303
2304 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2305 */
2306 if (_mesa_is_gles(ctx)) {
2307 switch (internalFormat) {
2308 case GL_BGRA:
2309 return GL_RGBA;
2310 default:
2311 ; /* fallthrough */
2312 }
2313 }
2314
2315 if (_mesa_has_ARB_ES2_compatibility(ctx) || _mesa_is_gles(ctx)) {
2316 switch (internalFormat) {
2317 case GL_RGB565:
2318 return GL_RGB;
2319 default:
2320 ; /* fallthrough */
2321 }
2322 }
2323
2324 if (_mesa_has_ARB_depth_texture(ctx) || _mesa_has_OES_depth_texture(ctx) ||
2325 ctx->API == API_OPENGL_CORE) {
2326 switch (internalFormat) {
2327 case GL_DEPTH_COMPONENT:
2328 case GL_DEPTH_COMPONENT16:
2329 case GL_DEPTH_COMPONENT24:
2330 case GL_DEPTH_COMPONENT32:
2331 return GL_DEPTH_COMPONENT;
2332 case GL_DEPTH_STENCIL:
2333 case GL_DEPTH24_STENCIL8:
2334 return GL_DEPTH_STENCIL;
2335 default:
2336 ; /* fallthrough */
2337 }
2338 }
2339
2340 if (_mesa_has_ARB_texture_stencil8(ctx) ||
2341 _mesa_has_OES_texture_stencil8(ctx)) {
2342 switch (internalFormat) {
2343 case GL_STENCIL_INDEX:
2344 case GL_STENCIL_INDEX1:
2345 case GL_STENCIL_INDEX4:
2346 case GL_STENCIL_INDEX8:
2347 case GL_STENCIL_INDEX16:
2348 return GL_STENCIL_INDEX;
2349 default:
2350 ; /* fallthrough */
2351 }
2352 }
2353
2354 switch (internalFormat) {
2355 case GL_COMPRESSED_ALPHA:
2356 return GL_ALPHA;
2357 case GL_COMPRESSED_LUMINANCE:
2358 return GL_LUMINANCE;
2359 case GL_COMPRESSED_LUMINANCE_ALPHA:
2360 return GL_LUMINANCE_ALPHA;
2361 case GL_COMPRESSED_INTENSITY:
2362 return GL_INTENSITY;
2363 case GL_COMPRESSED_RGB:
2364 return GL_RGB;
2365 case GL_COMPRESSED_RGBA:
2366 return GL_RGBA;
2367 default:
2368 ; /* fallthrough */
2369 }
2370
2371 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2372 GLenum base_compressed =
2373 _mesa_gl_compressed_format_base_format(internalFormat);
2374 if (base_compressed)
2375 return base_compressed;
2376 }
2377
2378 if ((_mesa_has_KHR_texture_compression_astc_ldr(ctx) &&
2379 is_astc_2d_format(internalFormat)) ||
2380 (_mesa_has_OES_texture_compression_astc(ctx) &&
2381 is_astc_3d_format(internalFormat)))
2382 return GL_RGBA;
2383
2384 if (!_mesa_has_MESA_ycbcr_texture(ctx)) {
2385 if (internalFormat == GL_YCBCR_MESA)
2386 return GL_YCBCR_MESA;
2387 }
2388
2389 if (ctx->Extensions.ARB_texture_float) {
2390 switch (internalFormat) {
2391 case GL_ALPHA16F_ARB:
2392 case GL_ALPHA32F_ARB:
2393 return GL_ALPHA;
2394 case GL_RGBA16F_ARB:
2395 case GL_RGBA32F_ARB:
2396 return GL_RGBA;
2397 case GL_RGB16F_ARB:
2398 case GL_RGB32F_ARB:
2399 return GL_RGB;
2400 case GL_INTENSITY16F_ARB:
2401 case GL_INTENSITY32F_ARB:
2402 return GL_INTENSITY;
2403 case GL_LUMINANCE16F_ARB:
2404 case GL_LUMINANCE32F_ARB:
2405 return GL_LUMINANCE;
2406 case GL_LUMINANCE_ALPHA16F_ARB:
2407 case GL_LUMINANCE_ALPHA32F_ARB:
2408 return GL_LUMINANCE_ALPHA;
2409 default:
2410 ; /* fallthrough */
2411 }
2412 }
2413
2414 if (ctx->Extensions.EXT_texture_snorm) {
2415 switch (internalFormat) {
2416 case GL_RED_SNORM:
2417 case GL_R8_SNORM:
2418 case GL_R16_SNORM:
2419 return GL_RED;
2420 case GL_RG_SNORM:
2421 case GL_RG8_SNORM:
2422 case GL_RG16_SNORM:
2423 return GL_RG;
2424 case GL_RGB_SNORM:
2425 case GL_RGB8_SNORM:
2426 case GL_RGB16_SNORM:
2427 return GL_RGB;
2428 case GL_RGBA_SNORM:
2429 case GL_RGBA8_SNORM:
2430 case GL_RGBA16_SNORM:
2431 return GL_RGBA;
2432 case GL_ALPHA_SNORM:
2433 case GL_ALPHA8_SNORM:
2434 case GL_ALPHA16_SNORM:
2435 return GL_ALPHA;
2436 case GL_LUMINANCE_SNORM:
2437 case GL_LUMINANCE8_SNORM:
2438 case GL_LUMINANCE16_SNORM:
2439 return GL_LUMINANCE;
2440 case GL_LUMINANCE_ALPHA_SNORM:
2441 case GL_LUMINANCE8_ALPHA8_SNORM:
2442 case GL_LUMINANCE16_ALPHA16_SNORM:
2443 return GL_LUMINANCE_ALPHA;
2444 case GL_INTENSITY_SNORM:
2445 case GL_INTENSITY8_SNORM:
2446 case GL_INTENSITY16_SNORM:
2447 return GL_INTENSITY;
2448 default:
2449 ; /* fallthrough */
2450 }
2451 }
2452
2453 if (ctx->Extensions.EXT_texture_sRGB) {
2454 switch (internalFormat) {
2455 case GL_SRGB_EXT:
2456 case GL_SRGB8_EXT:
2457 case GL_COMPRESSED_SRGB_EXT:
2458 return GL_RGB;
2459 case GL_SRGB_ALPHA_EXT:
2460 case GL_SRGB8_ALPHA8_EXT:
2461 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2462 return GL_RGBA;
2463 case GL_SLUMINANCE_ALPHA_EXT:
2464 case GL_SLUMINANCE8_ALPHA8_EXT:
2465 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2466 return GL_LUMINANCE_ALPHA;
2467 case GL_SLUMINANCE_EXT:
2468 case GL_SLUMINANCE8_EXT:
2469 case GL_COMPRESSED_SLUMINANCE_EXT:
2470 return GL_LUMINANCE;
2471 default:
2472 ; /* fallthrough */
2473 }
2474 }
2475
2476 if (ctx->Extensions.EXT_texture_sRGB_R8) {
2477 switch (internalFormat) {
2478 case GL_SR8_EXT:
2479 return GL_RED;
2480 default:
2481 ; /* fallthrough */
2482 }
2483 }
2484
2485 if (_mesa_has_integer_textures(ctx)) {
2486 switch (internalFormat) {
2487 case GL_RGBA8UI_EXT:
2488 case GL_RGBA16UI_EXT:
2489 case GL_RGBA32UI_EXT:
2490 case GL_RGBA8I_EXT:
2491 case GL_RGBA16I_EXT:
2492 case GL_RGBA32I_EXT:
2493 return GL_RGBA;
2494 case GL_RGB8UI_EXT:
2495 case GL_RGB16UI_EXT:
2496 case GL_RGB32UI_EXT:
2497 case GL_RGB8I_EXT:
2498 case GL_RGB16I_EXT:
2499 case GL_RGB32I_EXT:
2500 return GL_RGB;
2501 }
2502 }
2503
2504 if (_mesa_has_texture_rgb10_a2ui(ctx)) {
2505 switch (internalFormat) {
2506 case GL_RGB10_A2UI:
2507 return GL_RGBA;
2508 }
2509 }
2510
2511 if (_mesa_has_integer_textures(ctx)) {
2512 switch (internalFormat) {
2513 case GL_ALPHA8UI_EXT:
2514 case GL_ALPHA16UI_EXT:
2515 case GL_ALPHA32UI_EXT:
2516 case GL_ALPHA8I_EXT:
2517 case GL_ALPHA16I_EXT:
2518 case GL_ALPHA32I_EXT:
2519 return GL_ALPHA;
2520 case GL_INTENSITY8UI_EXT:
2521 case GL_INTENSITY16UI_EXT:
2522 case GL_INTENSITY32UI_EXT:
2523 case GL_INTENSITY8I_EXT:
2524 case GL_INTENSITY16I_EXT:
2525 case GL_INTENSITY32I_EXT:
2526 return GL_INTENSITY;
2527 case GL_LUMINANCE8UI_EXT:
2528 case GL_LUMINANCE16UI_EXT:
2529 case GL_LUMINANCE32UI_EXT:
2530 case GL_LUMINANCE8I_EXT:
2531 case GL_LUMINANCE16I_EXT:
2532 case GL_LUMINANCE32I_EXT:
2533 return GL_LUMINANCE;
2534 case GL_LUMINANCE_ALPHA8UI_EXT:
2535 case GL_LUMINANCE_ALPHA16UI_EXT:
2536 case GL_LUMINANCE_ALPHA32UI_EXT:
2537 case GL_LUMINANCE_ALPHA8I_EXT:
2538 case GL_LUMINANCE_ALPHA16I_EXT:
2539 case GL_LUMINANCE_ALPHA32I_EXT:
2540 return GL_LUMINANCE_ALPHA;
2541 default:
2542 ; /* fallthrough */
2543 }
2544 }
2545
2546 if (_mesa_has_rg_textures(ctx)) {
2547 switch (internalFormat) {
2548 case GL_R16F:
2549 case GL_R32F:
2550 if (!ctx->Extensions.ARB_texture_float)
2551 break;
2552 return GL_RED;
2553 case GL_R8I:
2554 case GL_R8UI:
2555 case GL_R16I:
2556 case GL_R16UI:
2557 case GL_R32I:
2558 case GL_R32UI:
2559 if (!_mesa_has_integer_textures(ctx))
2560 break;
2561 /* FALLTHROUGH */
2562 case GL_R8:
2563 case GL_R16:
2564 case GL_RED:
2565 case GL_COMPRESSED_RED:
2566 return GL_RED;
2567
2568 case GL_RG16F:
2569 case GL_RG32F:
2570 if (!ctx->Extensions.ARB_texture_float)
2571 break;
2572 return GL_RG;
2573 case GL_RG8I:
2574 case GL_RG8UI:
2575 case GL_RG16I:
2576 case GL_RG16UI:
2577 case GL_RG32I:
2578 case GL_RG32UI:
2579 if (!_mesa_has_integer_textures(ctx))
2580 break;
2581 /* FALLTHROUGH */
2582 case GL_RG:
2583 case GL_RG8:
2584 case GL_RG16:
2585 case GL_COMPRESSED_RG:
2586 return GL_RG;
2587 default:
2588 ; /* fallthrough */
2589 }
2590 }
2591
2592 if (_mesa_has_texture_shared_exponent(ctx)) {
2593 switch (internalFormat) {
2594 case GL_RGB9_E5_EXT:
2595 return GL_RGB;
2596 default:
2597 ; /* fallthrough */
2598 }
2599 }
2600
2601 if (_mesa_has_packed_float(ctx)) {
2602 switch (internalFormat) {
2603 case GL_R11F_G11F_B10F_EXT:
2604 return GL_RGB;
2605 default:
2606 ; /* fallthrough */
2607 }
2608 }
2609
2610 if (_mesa_has_float_depth_buffer(ctx)) {
2611 switch (internalFormat) {
2612 case GL_DEPTH_COMPONENT32F:
2613 return GL_DEPTH_COMPONENT;
2614 case GL_DEPTH32F_STENCIL8:
2615 return GL_DEPTH_STENCIL;
2616 default:
2617 ; /* fallthrough */
2618 }
2619 }
2620
2621 return -1; /* error */
2622 }
2623
2624 /**
2625 * Returns the effective internal format from a texture format and type.
2626 * This is used by texture image operations internally for validation, when
2627 * the specified internal format is a base (unsized) format.
2628 *
2629 * This method will only return a valid effective internal format if the
2630 * combination of format, type and internal format in base form, is acceptable.
2631 *
2632 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2633 * in extensions, to unambiguously correspond to the given base format, then
2634 * that internal format is returned as the effective. Otherwise, if the
2635 * combination is accepted but a single effective format is not defined, the
2636 * passed base format will be returned instead.
2637 *
2638 * \param format the texture format
2639 * \param type the texture type
2640 */
2641 static GLenum
2642 gles_effective_internal_format_for_format_and_type(GLenum format,
2643 GLenum type)
2644 {
2645 switch (type) {
2646 case GL_UNSIGNED_BYTE:
2647 switch (format) {
2648 case GL_RGBA:
2649 return GL_RGBA8;
2650 case GL_RGB:
2651 return GL_RGB8;
2652 case GL_RG:
2653 return GL_RG8;
2654 case GL_RED:
2655 return GL_R8;
2656 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2657 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2658 * internal formats, they do not correspond to GL constants, so the base
2659 * format is returned instead.
2660 */
2661 case GL_BGRA_EXT:
2662 case GL_LUMINANCE_ALPHA:
2663 case GL_LUMINANCE:
2664 case GL_ALPHA:
2665 return format;
2666 }
2667 break;
2668
2669 case GL_UNSIGNED_SHORT_4_4_4_4:
2670 if (format == GL_RGBA)
2671 return GL_RGBA4;
2672 break;
2673
2674 case GL_UNSIGNED_SHORT_5_5_5_1:
2675 if (format == GL_RGBA)
2676 return GL_RGB5_A1;
2677 break;
2678
2679 case GL_UNSIGNED_SHORT_5_6_5:
2680 if (format == GL_RGB)
2681 return GL_RGB565;
2682 break;
2683
2684 /* OES_packed_depth_stencil */
2685 case GL_UNSIGNED_INT_24_8:
2686 if (format == GL_DEPTH_STENCIL)
2687 return GL_DEPTH24_STENCIL8;
2688 break;
2689
2690 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2691 if (format == GL_DEPTH_STENCIL)
2692 return GL_DEPTH32F_STENCIL8;
2693 break;
2694
2695 case GL_UNSIGNED_SHORT:
2696 if (format == GL_DEPTH_COMPONENT)
2697 return GL_DEPTH_COMPONENT16;
2698 break;
2699
2700 case GL_UNSIGNED_INT:
2701 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2702 * the format.
2703 */
2704 if (format == GL_DEPTH_COMPONENT)
2705 return format;
2706 break;
2707
2708 /* OES_texture_float and OES_texture_half_float */
2709 case GL_FLOAT:
2710 if (format == GL_DEPTH_COMPONENT)
2711 return GL_DEPTH_COMPONENT32F;
2712 /* fall through */
2713 case GL_HALF_FLOAT_OES:
2714 switch (format) {
2715 case GL_RGBA:
2716 case GL_RGB:
2717 case GL_LUMINANCE_ALPHA:
2718 case GL_LUMINANCE:
2719 case GL_ALPHA:
2720 case GL_RED:
2721 case GL_RG:
2722 return format;
2723 }
2724 break;
2725 case GL_HALF_FLOAT:
2726 switch (format) {
2727 case GL_RG:
2728 case GL_RED:
2729 return format;
2730 }
2731 break;
2732
2733 /* GL_EXT_texture_type_2_10_10_10_REV */
2734 case GL_UNSIGNED_INT_2_10_10_10_REV:
2735 switch (format) {
2736 case GL_RGBA:
2737 case GL_RGB:
2738 return format;
2739 }
2740 break;
2741
2742 default:
2743 /* fall through and return NONE */
2744 break;
2745 }
2746
2747 return GL_NONE;
2748 }
2749
2750 /**
2751 * Do error checking of format/type combinations for OpenGL ES 3
2752 * glTex[Sub]Image, or ES1/ES2 with GL_OES_required_internalformat.
2753 * \return error code, or GL_NO_ERROR.
2754 */
2755 GLenum
2756 _mesa_gles_error_check_format_and_type(const struct gl_context *ctx,
2757 GLenum format, GLenum type,
2758 GLenum internalFormat)
2759 {
2760 /* If internalFormat is an unsized format, then the effective internal
2761 * format derived from format and type should be used instead. Page 127,
2762 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2763 *
2764 * "if internalformat is a base internal format, the effective
2765 * internal format is a sized internal format that is derived
2766 * from the format and type for internal use by the GL.
2767 * Table 3.12 specifies the mapping of format and type to effective
2768 * internal formats. The effective internal format is used by the GL
2769 * for purposes such as texture completeness or type checks for
2770 * CopyTex* commands. In these cases, the GL is required to operate
2771 * as if the effective internal format was used as the internalformat
2772 * when specifying the texture data."
2773 */
2774 if (_mesa_is_enum_format_unsized(internalFormat)) {
2775 GLenum effectiveInternalFormat =
2776 gles_effective_internal_format_for_format_and_type(format, type);
2777
2778 if (effectiveInternalFormat == GL_NONE)
2779 return GL_INVALID_OPERATION;
2780
2781 GLenum baseInternalFormat;
2782 if (internalFormat == GL_BGRA_EXT) {
2783 /* Unfortunately, _mesa_base_tex_format returns a base format of
2784 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2785 * asking the question, "what channels does this format have?"
2786 * However, if we're trying to determine if two internal formats
2787 * match in the ES3 sense, we actually want GL_BGRA.
2788 */
2789 baseInternalFormat = GL_BGRA_EXT;
2790 } else {
2791 baseInternalFormat =
2792 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2793 }
2794
2795 if (internalFormat != baseInternalFormat)
2796 return GL_INVALID_OPERATION;
2797
2798 internalFormat = effectiveInternalFormat;
2799 }
2800
2801 /* The GLES variant of EXT_texture_compression_s3tc is very vague and
2802 * doesn't list valid types. Just do exactly what the spec says.
2803 */
2804 if (_mesa_has_EXT_texture_compression_s3tc(ctx) &&
2805 (internalFormat == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||
2806 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ||
2807 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT3_EXT ||
2808 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT5_EXT))
2809 return format == GL_RGB || format == GL_RGBA ? GL_NO_ERROR :
2810 GL_INVALID_OPERATION;
2811
2812 switch (format) {
2813 case GL_BGRA_EXT:
2814 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2815 return GL_INVALID_OPERATION;
2816 break;
2817
2818 case GL_RGBA:
2819 switch (type) {
2820 case GL_UNSIGNED_BYTE:
2821 switch (internalFormat) {
2822 case GL_RGBA:
2823 case GL_RGBA8:
2824 case GL_RGB5_A1:
2825 case GL_RGBA4:
2826 break;
2827 case GL_SRGB8_ALPHA8_EXT:
2828 if (ctx->Version <= 20)
2829 return GL_INVALID_OPERATION;
2830 break;
2831 default:
2832 return GL_INVALID_OPERATION;
2833 }
2834 break;
2835
2836 case GL_BYTE:
2837 if (ctx->Version <= 20 || internalFormat != GL_RGBA8_SNORM)
2838 return GL_INVALID_OPERATION;
2839 break;
2840
2841 case GL_UNSIGNED_SHORT:
2842 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGBA16)
2843 return GL_INVALID_OPERATION;
2844 break;
2845
2846 case GL_SHORT:
2847 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2848 internalFormat != GL_RGBA16_SNORM)
2849 return GL_INVALID_OPERATION;
2850 break;
2851
2852 case GL_UNSIGNED_SHORT_4_4_4_4:
2853 switch (internalFormat) {
2854 case GL_RGBA:
2855 case GL_RGBA4:
2856 break;
2857 default:
2858 return GL_INVALID_OPERATION;
2859 }
2860 break;
2861
2862 case GL_UNSIGNED_SHORT_5_5_5_1:
2863 switch (internalFormat) {
2864 case GL_RGBA:
2865 case GL_RGB5_A1:
2866 break;
2867 default:
2868 return GL_INVALID_OPERATION;
2869 }
2870 break;
2871
2872 case GL_UNSIGNED_INT_2_10_10_10_REV:
2873 switch (internalFormat) {
2874 case GL_RGBA:
2875 case GL_RGB10_A2:
2876 case GL_RGB5_A1:
2877 if (!_mesa_has_texture_type_2_10_10_10_REV(ctx))
2878 return GL_INVALID_OPERATION;
2879 break;
2880 default:
2881 return GL_INVALID_OPERATION;
2882 }
2883 break;
2884
2885 case GL_HALF_FLOAT:
2886 if (ctx->Version <= 20 || internalFormat != GL_RGBA16F)
2887 return GL_INVALID_OPERATION;
2888 break;
2889
2890 case GL_FLOAT:
2891 switch (internalFormat) {
2892 case GL_RGBA16F:
2893 case GL_RGBA32F:
2894 if (ctx->Version <= 20)
2895 return GL_INVALID_OPERATION;
2896 break;
2897 case GL_RGBA:
2898 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2899 break;
2900 default:
2901 return GL_INVALID_OPERATION;
2902 }
2903 break;
2904
2905 case GL_HALF_FLOAT_OES:
2906 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2907 break;
2908 default:
2909 return GL_INVALID_OPERATION;
2910 }
2911 break;
2912
2913 case GL_RGBA_INTEGER:
2914 if (ctx->Version <= 20)
2915 return GL_INVALID_OPERATION;
2916 switch (type) {
2917 case GL_UNSIGNED_BYTE:
2918 if (internalFormat != GL_RGBA8UI)
2919 return GL_INVALID_OPERATION;
2920 break;
2921
2922 case GL_BYTE:
2923 if (internalFormat != GL_RGBA8I)
2924 return GL_INVALID_OPERATION;
2925 break;
2926
2927 case GL_UNSIGNED_SHORT:
2928 if (internalFormat != GL_RGBA16UI)
2929 return GL_INVALID_OPERATION;
2930 break;
2931
2932 case GL_SHORT:
2933 if (internalFormat != GL_RGBA16I)
2934 return GL_INVALID_OPERATION;
2935 break;
2936
2937 case GL_UNSIGNED_INT:
2938 if (internalFormat != GL_RGBA32UI)
2939 return GL_INVALID_OPERATION;
2940 break;
2941
2942 case GL_INT:
2943 if (internalFormat != GL_RGBA32I)
2944 return GL_INVALID_OPERATION;
2945 break;
2946
2947 case GL_UNSIGNED_INT_2_10_10_10_REV:
2948 if (internalFormat != GL_RGB10_A2UI)
2949 return GL_INVALID_OPERATION;
2950 break;
2951
2952 default:
2953 return GL_INVALID_OPERATION;
2954 }
2955 break;
2956
2957 case GL_RGB:
2958 switch (type) {
2959 case GL_UNSIGNED_BYTE:
2960 switch (internalFormat) {
2961 case GL_RGB:
2962 case GL_RGB8:
2963 case GL_RGB565:
2964 break;
2965 case GL_SRGB8:
2966 if (ctx->Version <= 20)
2967 return GL_INVALID_OPERATION;
2968 break;
2969 default:
2970 return GL_INVALID_OPERATION;
2971 }
2972 break;
2973
2974 case GL_BYTE:
2975 if (ctx->Version <= 20 || internalFormat != GL_RGB8_SNORM)
2976 return GL_INVALID_OPERATION;
2977 break;
2978
2979 case GL_UNSIGNED_SHORT:
2980 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGB16)
2981 return GL_INVALID_OPERATION;
2982 break;
2983
2984 case GL_SHORT:
2985 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2986 internalFormat != GL_RGB16_SNORM)
2987 return GL_INVALID_OPERATION;
2988 break;
2989
2990 case GL_UNSIGNED_SHORT_5_6_5:
2991 switch (internalFormat) {
2992 case GL_RGB:
2993 case GL_RGB565:
2994 break;
2995 default:
2996 return GL_INVALID_OPERATION;
2997 }
2998 break;
2999
3000 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3001 if (ctx->Version <= 20 || internalFormat != GL_R11F_G11F_B10F)
3002 return GL_INVALID_OPERATION;
3003 break;
3004
3005 case GL_UNSIGNED_INT_5_9_9_9_REV:
3006 if (ctx->Version <= 20 || internalFormat != GL_RGB9_E5)
3007 return GL_INVALID_OPERATION;
3008 break;
3009
3010 case GL_HALF_FLOAT:
3011 if (ctx->Version <= 20)
3012 return GL_INVALID_OPERATION;
3013 switch (internalFormat) {
3014 case GL_RGB16F:
3015 case GL_R11F_G11F_B10F:
3016 case GL_RGB9_E5:
3017 break;
3018 default:
3019 return GL_INVALID_OPERATION;
3020 }
3021 break;
3022
3023 case GL_FLOAT:
3024 switch (internalFormat) {
3025 case GL_RGB16F:
3026 case GL_RGB32F:
3027 case GL_R11F_G11F_B10F:
3028 case GL_RGB9_E5:
3029 if (ctx->Version <= 20)
3030 return GL_INVALID_OPERATION;
3031 break;
3032 case GL_RGB:
3033 if (ctx->Extensions.OES_texture_float && internalFormat == format)
3034 break;
3035 default:
3036 return GL_INVALID_OPERATION;
3037 }
3038 break;
3039
3040 case GL_HALF_FLOAT_OES:
3041 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3042 return GL_INVALID_OPERATION;
3043 break;
3044
3045 case GL_UNSIGNED_INT_2_10_10_10_REV:
3046 switch (internalFormat) {
3047 case GL_RGB:
3048 case GL_RGB10:
3049 case GL_RGB8:
3050 case GL_RGB565:
3051 /* GL_EXT_texture_type_2_10_10_10_REV allows GL_RGB even though
3052 * GLES3 doesn't, and GL_OES_required_internalformat extends that
3053 * to allow the sized RGB internalformats as well.
3054 */
3055 if (!_mesa_has_texture_type_2_10_10_10_REV(ctx))
3056 return GL_INVALID_OPERATION;
3057 break;
3058 default:
3059 return GL_INVALID_OPERATION;
3060 }
3061 break;
3062
3063 default:
3064 return GL_INVALID_OPERATION;
3065 }
3066 break;
3067
3068 case GL_RGB_INTEGER:
3069 if (ctx->Version <= 20)
3070 return GL_INVALID_OPERATION;
3071 switch (type) {
3072 case GL_UNSIGNED_BYTE:
3073 if (internalFormat != GL_RGB8UI)
3074 return GL_INVALID_OPERATION;
3075 break;
3076
3077 case GL_BYTE:
3078 if (internalFormat != GL_RGB8I)
3079 return GL_INVALID_OPERATION;
3080 break;
3081
3082 case GL_UNSIGNED_SHORT:
3083 if (internalFormat != GL_RGB16UI)
3084 return GL_INVALID_OPERATION;
3085 break;
3086
3087 case GL_SHORT:
3088 if (internalFormat != GL_RGB16I)
3089 return GL_INVALID_OPERATION;
3090 break;
3091
3092 case GL_UNSIGNED_INT:
3093 if (internalFormat != GL_RGB32UI)
3094 return GL_INVALID_OPERATION;
3095 break;
3096
3097 case GL_INT:
3098 if (internalFormat != GL_RGB32I)
3099 return GL_INVALID_OPERATION;
3100 break;
3101
3102 default:
3103 return GL_INVALID_OPERATION;
3104 }
3105 break;
3106
3107 case GL_RG:
3108 if (!_mesa_has_rg_textures(ctx))
3109 return GL_INVALID_OPERATION;
3110 switch (type) {
3111 case GL_UNSIGNED_BYTE:
3112 if (internalFormat != GL_RG8)
3113 return GL_INVALID_OPERATION;
3114 break;
3115
3116 case GL_BYTE:
3117 if (internalFormat != GL_RG8_SNORM)
3118 return GL_INVALID_OPERATION;
3119 break;
3120
3121 case GL_UNSIGNED_SHORT:
3122 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RG16)
3123 return GL_INVALID_OPERATION;
3124 break;
3125
3126 case GL_SHORT:
3127 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3128 internalFormat != GL_RG16_SNORM)
3129 return GL_INVALID_OPERATION;
3130 break;
3131
3132 case GL_HALF_FLOAT:
3133 case GL_HALF_FLOAT_OES:
3134 switch (internalFormat) {
3135 case GL_RG16F:
3136 if (ctx->Version <= 20)
3137 return GL_INVALID_OPERATION;
3138 break;
3139 case GL_RG:
3140 if (_mesa_has_rg_textures(ctx) &&
3141 ctx->Extensions.OES_texture_half_float)
3142 break;
3143 /* fallthrough */
3144 default:
3145 return GL_INVALID_OPERATION;
3146 }
3147 break;
3148
3149 case GL_FLOAT:
3150 switch (internalFormat) {
3151 case GL_RG16F:
3152 case GL_RG32F:
3153 break;
3154 case GL_RG:
3155 if (_mesa_has_rg_textures(ctx) &&
3156 ctx->Extensions.OES_texture_float)
3157 break;
3158 /* fallthrough */
3159 default:
3160 return GL_INVALID_OPERATION;
3161 }
3162 break;
3163
3164 default:
3165 return GL_INVALID_OPERATION;
3166 }
3167 break;
3168
3169 case GL_RG_INTEGER:
3170 if (ctx->Version <= 20)
3171 return GL_INVALID_OPERATION;
3172 switch (type) {
3173 case GL_UNSIGNED_BYTE:
3174 if (internalFormat != GL_RG8UI)
3175 return GL_INVALID_OPERATION;
3176 break;
3177
3178 case GL_BYTE:
3179 if (internalFormat != GL_RG8I)
3180 return GL_INVALID_OPERATION;
3181 break;
3182
3183 case GL_UNSIGNED_SHORT:
3184 if (internalFormat != GL_RG16UI)
3185 return GL_INVALID_OPERATION;
3186 break;
3187
3188 case GL_SHORT:
3189 if (internalFormat != GL_RG16I)
3190 return GL_INVALID_OPERATION;
3191 break;
3192
3193 case GL_UNSIGNED_INT:
3194 if (internalFormat != GL_RG32UI)
3195 return GL_INVALID_OPERATION;
3196 break;
3197
3198 case GL_INT:
3199 if (internalFormat != GL_RG32I)
3200 return GL_INVALID_OPERATION;
3201 break;
3202
3203 default:
3204 return GL_INVALID_OPERATION;
3205 }
3206 break;
3207
3208 case GL_RED:
3209 if (!_mesa_has_rg_textures(ctx))
3210 return GL_INVALID_OPERATION;
3211 switch (type) {
3212 case GL_UNSIGNED_BYTE:
3213 if (internalFormat == GL_R8 ||
3214 ((internalFormat == GL_SR8_EXT) &&
3215 ctx->Extensions.EXT_texture_sRGB_R8))
3216 break;
3217 return GL_INVALID_OPERATION;
3218
3219 case GL_BYTE:
3220 if (internalFormat != GL_R8_SNORM)
3221 return GL_INVALID_OPERATION;
3222 break;
3223
3224 case GL_UNSIGNED_SHORT:
3225 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_R16)
3226 return GL_INVALID_OPERATION;
3227 break;
3228
3229 case GL_SHORT:
3230 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3231 internalFormat != GL_R16_SNORM)
3232 return GL_INVALID_OPERATION;
3233 break;
3234
3235 case GL_HALF_FLOAT:
3236 case GL_HALF_FLOAT_OES:
3237 switch (internalFormat) {
3238 case GL_R16F:
3239 if (ctx->Version <= 20)
3240 return GL_INVALID_OPERATION;
3241 break;
3242 case GL_RG:
3243 case GL_RED:
3244 if (_mesa_has_rg_textures(ctx) &&
3245 ctx->Extensions.OES_texture_half_float)
3246 break;
3247 /* fallthrough */
3248 default:
3249 return GL_INVALID_OPERATION;
3250 }
3251 break;
3252
3253 case GL_FLOAT:
3254 switch (internalFormat) {
3255 case GL_R16F:
3256 case GL_R32F:
3257 break;
3258 case GL_RED:
3259 if (_mesa_has_rg_textures(ctx) &&
3260 ctx->Extensions.OES_texture_float)
3261 break;
3262 /* fallthrough */
3263 default:
3264 return GL_INVALID_OPERATION;
3265 }
3266 break;
3267
3268 default:
3269 return GL_INVALID_OPERATION;
3270 }
3271 break;
3272
3273 case GL_RED_INTEGER:
3274 if (ctx->Version <= 20)
3275 return GL_INVALID_OPERATION;
3276 switch (type) {
3277 case GL_UNSIGNED_BYTE:
3278 if (internalFormat != GL_R8UI)
3279 return GL_INVALID_OPERATION;
3280 break;
3281
3282 case GL_BYTE:
3283 if (internalFormat != GL_R8I)
3284 return GL_INVALID_OPERATION;
3285 break;
3286
3287 case GL_UNSIGNED_SHORT:
3288 if (internalFormat != GL_R16UI)
3289 return GL_INVALID_OPERATION;
3290 break;
3291
3292 case GL_SHORT:
3293 if (internalFormat != GL_R16I)
3294 return GL_INVALID_OPERATION;
3295 break;
3296
3297 case GL_UNSIGNED_INT:
3298 if (internalFormat != GL_R32UI)
3299 return GL_INVALID_OPERATION;
3300 break;
3301
3302 case GL_INT:
3303 if (internalFormat != GL_R32I)
3304 return GL_INVALID_OPERATION;
3305 break;
3306
3307 default:
3308 return GL_INVALID_OPERATION;
3309 }
3310 break;
3311
3312 case GL_DEPTH_COMPONENT:
3313 switch (type) {
3314 case GL_UNSIGNED_SHORT:
3315 if (internalFormat != GL_DEPTH_COMPONENT
3316 && internalFormat != GL_DEPTH_COMPONENT16)
3317 return GL_INVALID_OPERATION;
3318 break;
3319
3320 case GL_UNSIGNED_INT:
3321 switch (internalFormat) {
3322 case GL_DEPTH_COMPONENT:
3323 case GL_DEPTH_COMPONENT16:
3324 case GL_DEPTH_COMPONENT24:
3325 break;
3326 default:
3327 return GL_INVALID_OPERATION;
3328 }
3329 break;
3330
3331 case GL_FLOAT:
3332 if (ctx->Version <= 20 || internalFormat != GL_DEPTH_COMPONENT32F)
3333 return GL_INVALID_OPERATION;
3334 break;
3335
3336 default:
3337 return GL_INVALID_OPERATION;
3338 }
3339 break;
3340
3341 case GL_DEPTH_STENCIL:
3342 switch (type) {
3343 case GL_UNSIGNED_INT_24_8:
3344 if (internalFormat != GL_DEPTH_STENCIL
3345 && internalFormat != GL_DEPTH24_STENCIL8)
3346 return GL_INVALID_OPERATION;
3347 break;
3348
3349 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3350 if (ctx->Version <= 20 || internalFormat != GL_DEPTH32F_STENCIL8)
3351 return GL_INVALID_OPERATION;
3352 break;
3353
3354 default:
3355 return GL_INVALID_OPERATION;
3356 }
3357 break;
3358
3359 case GL_STENCIL_INDEX:
3360 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3361 type != GL_UNSIGNED_BYTE ||
3362 internalFormat != GL_STENCIL_INDEX8) {
3363 return GL_INVALID_OPERATION;
3364 }
3365 break;
3366
3367 case GL_ALPHA:
3368 case GL_LUMINANCE:
3369 case GL_LUMINANCE_ALPHA:
3370 switch (type) {
3371 case GL_FLOAT:
3372 if (!ctx->Extensions.OES_texture_float || internalFormat != format)
3373 return GL_INVALID_OPERATION;
3374 break;
3375 case GL_HALF_FLOAT_OES:
3376 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3377 return GL_INVALID_OPERATION;
3378 break;
3379 case GL_UNSIGNED_BYTE:
3380 if (!(format == internalFormat ||
3381 (format == GL_ALPHA && internalFormat == GL_ALPHA8) ||
3382 (format == GL_LUMINANCE && internalFormat == GL_LUMINANCE8) ||
3383 (format == GL_LUMINANCE_ALPHA &&
3384 ((internalFormat == GL_LUMINANCE8_ALPHA8) ||
3385 (internalFormat == GL_LUMINANCE4_ALPHA4))))) {
3386 return GL_INVALID_OPERATION;
3387 }
3388 break;
3389 default:
3390 return GL_INVALID_OPERATION;
3391 }
3392 break;
3393 }
3394
3395 return GL_NO_ERROR;
3396 }
3397
3398 static void
3399 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3400 {
3401 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3402 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3403 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3404 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3405 }
3406
3407 static bool
3408 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3409 {
3410 switch (format) {
3411 case GL_RGBA:
3412 case GL_RGBA_INTEGER_EXT:
3413 set_swizzle(swizzle, 0, 1, 2, 3);
3414 return true;
3415 case GL_BGRA:
3416 case GL_BGRA_INTEGER_EXT:
3417 set_swizzle(swizzle, 2, 1, 0, 3);
3418 return true;
3419 case GL_ABGR_EXT:
3420 set_swizzle(swizzle, 3, 2, 1, 0);
3421 return true;
3422 case GL_RGB:
3423 case GL_RGB_INTEGER_EXT:
3424 set_swizzle(swizzle, 0, 1, 2, 5);
3425 return true;
3426 case GL_BGR:
3427 case GL_BGR_INTEGER_EXT:
3428 set_swizzle(swizzle, 2, 1, 0, 5);
3429 return true;
3430 case GL_LUMINANCE_ALPHA:
3431 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3432 set_swizzle(swizzle, 0, 0, 0, 1);
3433 return true;
3434 case GL_RG:
3435 case GL_RG_INTEGER:
3436 set_swizzle(swizzle, 0, 1, 4, 5);
3437 return true;
3438 case GL_RED:
3439 case GL_RED_INTEGER_EXT:
3440 set_swizzle(swizzle, 0, 4, 4, 5);
3441 return true;
3442 case GL_GREEN:
3443 case GL_GREEN_INTEGER_EXT:
3444 set_swizzle(swizzle, 4, 0, 4, 5);
3445 return true;
3446 case GL_BLUE:
3447 case GL_BLUE_INTEGER_EXT:
3448 set_swizzle(swizzle, 4, 4, 0, 5);
3449 return true;
3450 case GL_ALPHA:
3451 case GL_ALPHA_INTEGER_EXT:
3452 set_swizzle(swizzle, 4, 4, 4, 0);
3453 return true;
3454 case GL_LUMINANCE:
3455 case GL_LUMINANCE_INTEGER_EXT:
3456 set_swizzle(swizzle, 0, 0, 0, 5);
3457 return true;
3458 case GL_INTENSITY:
3459 set_swizzle(swizzle, 0, 0, 0, 0);
3460 return true;
3461 default:
3462 return false;
3463 }
3464 }
3465
3466 /**
3467 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3468 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3469 * otherwise (for non-array formats).
3470 *
3471 * This function will typically be used to compute a mesa format from a GL type
3472 * so we can then call _mesa_format_convert. This function does
3473 * not consider byte swapping, so it returns types assuming that no byte
3474 * swapping is involved. If byte swapping is involved then clients are supposed
3475 * to handle that on their side before calling _mesa_format_convert.
3476 *
3477 * This function returns an uint32_t that can pack a mesa_format or a
3478 * mesa_array_format. Clients must check the mesa array format bit
3479 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3480 * format is a mesa_array_format or a mesa_format.
3481 */
3482 uint32_t
3483 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3484 {
3485 bool is_array_format = true;
3486 uint8_t swizzle[4];
3487 bool normalized = false, is_float = false, is_signed = false;
3488 int num_channels = 0, type_size = 0;
3489
3490 /* Extract array format type information from the OpenGL data type */
3491 switch (type) {
3492 case GL_UNSIGNED_BYTE:
3493 type_size = 1;
3494 break;
3495 case GL_BYTE:
3496 type_size = 1;
3497 is_signed = true;
3498 break;
3499 case GL_UNSIGNED_SHORT:
3500 type_size = 2;
3501 break;
3502 case GL_SHORT:
3503 type_size = 2;
3504 is_signed = true;
3505 break;
3506 case GL_UNSIGNED_INT:
3507 type_size = 4;
3508 break;
3509 case GL_INT:
3510 type_size = 4;
3511 is_signed = true;
3512 break;
3513 case GL_HALF_FLOAT:
3514 case GL_HALF_FLOAT_OES:
3515 type_size = 2;
3516 is_signed = true;
3517 is_float = true;
3518 break;
3519 case GL_FLOAT:
3520 type_size = 4;
3521 is_signed = true;
3522 is_float = true;
3523 break;
3524 default:
3525 is_array_format = false;
3526 break;
3527 }
3528
3529 /* Extract array format swizzle information from the OpenGL format */
3530 if (is_array_format)
3531 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3532
3533 /* If this is an array format type after checking data type and format,
3534 * create the array format
3535 */
3536 if (is_array_format) {
3537 normalized = !_mesa_is_enum_format_integer(format);
3538 num_channels = _mesa_components_in_format(format);
3539
3540 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
3541 normalized, num_channels,
3542 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3543 }
3544
3545 /* Otherwise this is not an array format, so return the mesa_format
3546 * matching the OpenGL format and data type
3547 */
3548 switch (type) {
3549 case GL_UNSIGNED_SHORT_5_6_5:
3550 if (format == GL_RGB)
3551 return MESA_FORMAT_B5G6R5_UNORM;
3552 else if (format == GL_BGR)
3553 return MESA_FORMAT_R5G6B5_UNORM;
3554 else if (format == GL_RGB_INTEGER)
3555 return MESA_FORMAT_B5G6R5_UINT;
3556 break;
3557 case GL_UNSIGNED_SHORT_5_6_5_REV:
3558 if (format == GL_RGB)
3559 return MESA_FORMAT_R5G6B5_UNORM;
3560 else if (format == GL_BGR)
3561 return MESA_FORMAT_B5G6R5_UNORM;
3562 else if (format == GL_RGB_INTEGER)
3563 return MESA_FORMAT_R5G6B5_UINT;
3564 break;
3565 case GL_UNSIGNED_SHORT_4_4_4_4:
3566 if (format == GL_RGBA)
3567 return MESA_FORMAT_A4B4G4R4_UNORM;
3568 else if (format == GL_BGRA)
3569 return MESA_FORMAT_A4R4G4B4_UNORM;
3570 else if (format == GL_ABGR_EXT)
3571 return MESA_FORMAT_R4G4B4A4_UNORM;
3572 else if (format == GL_RGBA_INTEGER)
3573 return MESA_FORMAT_A4B4G4R4_UINT;
3574 else if (format == GL_BGRA_INTEGER)
3575 return MESA_FORMAT_A4R4G4B4_UINT;
3576 break;
3577 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3578 if (format == GL_RGBA)
3579 return MESA_FORMAT_R4G4B4A4_UNORM;
3580 else if (format == GL_BGRA)
3581 return MESA_FORMAT_B4G4R4A4_UNORM;
3582 else if (format == GL_ABGR_EXT)
3583 return MESA_FORMAT_A4B4G4R4_UNORM;
3584 else if (format == GL_RGBA_INTEGER)
3585 return MESA_FORMAT_R4G4B4A4_UINT;
3586 else if (format == GL_BGRA_INTEGER)
3587 return MESA_FORMAT_B4G4R4A4_UINT;
3588 break;
3589 case GL_UNSIGNED_SHORT_5_5_5_1:
3590 if (format == GL_RGBA)
3591 return MESA_FORMAT_A1B5G5R5_UNORM;
3592 else if (format == GL_BGRA)
3593 return MESA_FORMAT_A1R5G5B5_UNORM;
3594 else if (format == GL_RGBA_INTEGER)
3595 return MESA_FORMAT_A1B5G5R5_UINT;
3596 else if (format == GL_BGRA_INTEGER)
3597 return MESA_FORMAT_A1R5G5B5_UINT;
3598 break;
3599 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3600 if (format == GL_RGBA)
3601 return MESA_FORMAT_R5G5B5A1_UNORM;
3602 else if (format == GL_BGRA)
3603 return MESA_FORMAT_B5G5R5A1_UNORM;
3604 else if (format == GL_RGBA_INTEGER)
3605 return MESA_FORMAT_R5G5B5A1_UINT;
3606 else if (format == GL_BGRA_INTEGER)
3607 return MESA_FORMAT_B5G5R5A1_UINT;
3608 break;
3609 case GL_UNSIGNED_BYTE_3_3_2:
3610 if (format == GL_RGB)
3611 return MESA_FORMAT_B2G3R3_UNORM;
3612 else if (format == GL_RGB_INTEGER)
3613 return MESA_FORMAT_B2G3R3_UINT;
3614 break;
3615 case GL_UNSIGNED_BYTE_2_3_3_REV:
3616 if (format == GL_RGB)
3617 return MESA_FORMAT_R3G3B2_UNORM;
3618 else if (format == GL_RGB_INTEGER)
3619 return MESA_FORMAT_R3G3B2_UINT;
3620 break;
3621 case GL_UNSIGNED_INT_5_9_9_9_REV:
3622 if (format == GL_RGB)
3623 return MESA_FORMAT_R9G9B9E5_FLOAT;
3624 break;
3625 case GL_UNSIGNED_INT_10_10_10_2:
3626 if (format == GL_RGBA)
3627 return MESA_FORMAT_A2B10G10R10_UNORM;
3628 else if (format == GL_RGBA_INTEGER)
3629 return MESA_FORMAT_A2B10G10R10_UINT;
3630 else if (format == GL_BGRA)
3631 return MESA_FORMAT_A2R10G10B10_UNORM;
3632 else if (format == GL_BGRA_INTEGER)
3633 return MESA_FORMAT_A2R10G10B10_UINT;
3634 break;
3635 case GL_UNSIGNED_INT_2_10_10_10_REV:
3636 if (format == GL_RGB)
3637 return MESA_FORMAT_R10G10B10X2_UNORM;
3638 if (format == GL_RGBA)
3639 return MESA_FORMAT_R10G10B10A2_UNORM;
3640 else if (format == GL_RGBA_INTEGER)
3641 return MESA_FORMAT_R10G10B10A2_UINT;
3642 else if (format == GL_BGRA)
3643 return MESA_FORMAT_B10G10R10A2_UNORM;
3644 else if (format == GL_BGRA_INTEGER)
3645 return MESA_FORMAT_B10G10R10A2_UINT;
3646 break;
3647 case GL_UNSIGNED_INT_8_8_8_8:
3648 if (format == GL_RGBA)
3649 return MESA_FORMAT_A8B8G8R8_UNORM;
3650 else if (format == GL_BGRA)
3651 return MESA_FORMAT_A8R8G8B8_UNORM;
3652 else if (format == GL_ABGR_EXT)
3653 return MESA_FORMAT_R8G8B8A8_UNORM;
3654 else if (format == GL_RGBA_INTEGER)
3655 return MESA_FORMAT_A8B8G8R8_UINT;
3656 else if (format == GL_BGRA_INTEGER)
3657 return MESA_FORMAT_A8R8G8B8_UINT;
3658 break;
3659 case GL_UNSIGNED_INT_8_8_8_8_REV:
3660 if (format == GL_RGBA)
3661 return MESA_FORMAT_R8G8B8A8_UNORM;
3662 else if (format == GL_BGRA)
3663 return MESA_FORMAT_B8G8R8A8_UNORM;
3664 else if (format == GL_ABGR_EXT)
3665 return MESA_FORMAT_A8B8G8R8_UNORM;
3666 else if (format == GL_RGBA_INTEGER)
3667 return MESA_FORMAT_R8G8B8A8_UINT;
3668 else if (format == GL_BGRA_INTEGER)
3669 return MESA_FORMAT_B8G8R8A8_UINT;
3670 break;
3671 case GL_UNSIGNED_SHORT_8_8_MESA:
3672 if (format == GL_YCBCR_MESA)
3673 return MESA_FORMAT_YCBCR;
3674 break;
3675 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3676 if (format == GL_YCBCR_MESA)
3677 return MESA_FORMAT_YCBCR_REV;
3678 break;
3679 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3680 if (format == GL_RGB)
3681 return MESA_FORMAT_R11G11B10_FLOAT;
3682 break;
3683 case GL_FLOAT:
3684 if (format == GL_DEPTH_COMPONENT)
3685 return MESA_FORMAT_Z_FLOAT32;
3686 break;
3687 case GL_UNSIGNED_INT:
3688 if (format == GL_DEPTH_COMPONENT)
3689 return MESA_FORMAT_Z_UNORM32;
3690 break;
3691 case GL_UNSIGNED_SHORT:
3692 if (format == GL_DEPTH_COMPONENT)
3693 return MESA_FORMAT_Z_UNORM16;
3694 break;
3695 case GL_UNSIGNED_INT_24_8:
3696 if (format == GL_DEPTH_STENCIL)
3697 return MESA_FORMAT_Z24_UNORM_S8_UINT;
3698 break;
3699 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3700 if (format == GL_DEPTH_STENCIL)
3701 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3702 break;
3703 default:
3704 break;
3705 }
3706
3707 /* If we got here it means that we could not find a Mesa format that
3708 * matches the GL format/type provided. We may need to add a new Mesa
3709 * format in that case.
3710 */
3711 unreachable("Unsupported format");
3712 }
3713
3714 uint32_t
3715 _mesa_tex_format_from_format_and_type(const struct gl_context *ctx,
3716 GLenum gl_format, GLenum type)
3717 {
3718 mesa_format format = _mesa_format_from_format_and_type(gl_format, type);
3719
3720 if (_mesa_format_is_mesa_array_format(format))
3721 format = _mesa_format_from_array_format(format);
3722
3723 if (format == MESA_FORMAT_NONE || !ctx->TextureFormatSupported[format])
3724 return MESA_FORMAT_NONE;
3725
3726 return format;
3727 }
3728
3729 /**
3730 * Returns true if \p internal_format is a sized internal format that
3731 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
3732 */
3733 bool
3734 _mesa_is_es3_color_renderable(const struct gl_context *ctx,
3735 GLenum internal_format)
3736 {
3737 switch (internal_format) {
3738 case GL_R8:
3739 case GL_RG8:
3740 case GL_RGB8:
3741 case GL_RGB565:
3742 case GL_RGBA4:
3743 case GL_RGB5_A1:
3744 case GL_RGBA8:
3745 case GL_RGB10_A2:
3746 case GL_RGB10_A2UI:
3747 case GL_SRGB8_ALPHA8:
3748 case GL_R16F:
3749 case GL_RG16F:
3750 case GL_RGBA16F:
3751 case GL_R32F:
3752 case GL_RG32F:
3753 case GL_RGBA32F:
3754 case GL_R11F_G11F_B10F:
3755 case GL_R8I:
3756 case GL_R8UI:
3757 case GL_R16I:
3758 case GL_R16UI:
3759 case GL_R32I:
3760 case GL_R32UI:
3761 case GL_RG8I:
3762 case GL_RG8UI:
3763 case GL_RG16I:
3764 case GL_RG16UI:
3765 case GL_RG32I:
3766 case GL_RG32UI:
3767 case GL_RGBA8I:
3768 case GL_RGBA8UI:
3769 case GL_RGBA16I:
3770 case GL_RGBA16UI:
3771 case GL_RGBA32I:
3772 case GL_RGBA32UI:
3773 return true;
3774 case GL_R16:
3775 case GL_RG16:
3776 case GL_RGBA16:
3777 return _mesa_has_EXT_texture_norm16(ctx);
3778 case GL_R8_SNORM:
3779 case GL_RG8_SNORM:
3780 case GL_RGBA8_SNORM:
3781 return _mesa_has_EXT_render_snorm(ctx);
3782 case GL_R16_SNORM:
3783 case GL_RG16_SNORM:
3784 case GL_RGBA16_SNORM:
3785 return _mesa_has_EXT_texture_norm16(ctx) &&
3786 _mesa_has_EXT_render_snorm(ctx);
3787 default:
3788 return false;
3789 }
3790 }
3791
3792 /**
3793 * Returns true if \p internal_format is a sized internal format that
3794 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
3795 */
3796 bool
3797 _mesa_is_es3_texture_filterable(const struct gl_context *ctx,
3798 GLenum internal_format)
3799 {
3800 switch (internal_format) {
3801 case GL_R8:
3802 case GL_R8_SNORM:
3803 case GL_RG8:
3804 case GL_RG8_SNORM:
3805 case GL_RGB8:
3806 case GL_RGB8_SNORM:
3807 case GL_RGB565:
3808 case GL_RGBA4:
3809 case GL_RGB5_A1:
3810 case GL_RGBA8:
3811 case GL_RGBA8_SNORM:
3812 case GL_RGB10_A2:
3813 case GL_SRGB8:
3814 case GL_SRGB8_ALPHA8:
3815 case GL_R16F:
3816 case GL_RG16F:
3817 case GL_RGB16F:
3818 case GL_RGBA16F:
3819 case GL_R11F_G11F_B10F:
3820 case GL_RGB9_E5:
3821 return true;
3822 case GL_R16:
3823 case GL_R16_SNORM:
3824 case GL_RG16:
3825 case GL_RG16_SNORM:
3826 case GL_RGB16:
3827 case GL_RGB16_SNORM:
3828 case GL_RGBA16:
3829 case GL_RGBA16_SNORM:
3830 return _mesa_has_EXT_texture_norm16(ctx);
3831 case GL_R32F:
3832 case GL_RG32F:
3833 case GL_RGB32F:
3834 case GL_RGBA32F:
3835 /* The OES_texture_float_linear spec says:
3836 *
3837 * "When implemented against OpenGL ES 3.0 or later versions, sized
3838 * 32-bit floating-point formats become texture-filterable. This
3839 * should be noted by, for example, checking the ``TF'' column of
3840 * table 8.13 in the ES 3.1 Specification (``Correspondence of sized
3841 * internal formats to base internal formats ... and use cases ...'')
3842 * for the R32F, RG32F, RGB32F, and RGBA32F formats."
3843 */
3844 return _mesa_has_OES_texture_float_linear(ctx);
3845 default:
3846 return false;
3847 }
3848 }