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mesa: GL_EXT_texture_norm16 extension plumbing
[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 default:
567 return -1;
568 }
569 }
570
571 /**
572 * Test if the given format is unsized.
573 */
574 GLboolean
575 _mesa_is_enum_format_unsized(GLenum format)
576 {
577 switch (format) {
578 case GL_RGBA:
579 case GL_BGRA:
580 case GL_ABGR_EXT:
581 case GL_RGB:
582 case GL_BGR:
583 case GL_RG:
584 case GL_RED:
585 case GL_GREEN:
586 case GL_BLUE:
587 case GL_ALPHA:
588 case GL_INTENSITY:
589 case GL_LUMINANCE:
590 case GL_LUMINANCE_ALPHA:
591
592 case GL_SRGB:
593 case GL_SRGB_ALPHA:
594 case GL_SLUMINANCE:
595 case GL_SLUMINANCE_ALPHA:
596
597 case GL_RGBA_SNORM:
598 case GL_RGB_SNORM:
599 case GL_RG_SNORM:
600 case GL_RED_SNORM:
601 case GL_ALPHA_SNORM:
602 case GL_INTENSITY_SNORM:
603 case GL_LUMINANCE_SNORM:
604 case GL_LUMINANCE_ALPHA_SNORM:
605
606 case GL_RED_INTEGER:
607 case GL_GREEN_INTEGER:
608 case GL_BLUE_INTEGER:
609 case GL_ALPHA_INTEGER:
610 case GL_RGB_INTEGER:
611 case GL_RGBA_INTEGER:
612 case GL_BGR_INTEGER:
613 case GL_BGRA_INTEGER:
614 case GL_RG_INTEGER:
615 case GL_LUMINANCE_INTEGER_EXT:
616 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
617
618 case GL_DEPTH_COMPONENT:
619 case GL_DEPTH_STENCIL:
620 case GL_STENCIL_INDEX:
621 return GL_TRUE;
622 default:
623 return GL_FALSE;
624 }
625 }
626
627 /**
628 * Test if the given format is a UNORM (unsigned-normalized) format.
629 */
630 GLboolean
631 _mesa_is_enum_format_unorm(GLenum format)
632 {
633 switch(format) {
634 case GL_RED:
635 case GL_GREEN:
636 case GL_BLUE:
637 case GL_ALPHA:
638 case GL_ALPHA4:
639 case GL_ALPHA8:
640 case GL_ALPHA12:
641 case GL_ALPHA16:
642 case 1:
643 case GL_LUMINANCE:
644 case GL_SLUMINANCE:
645 case GL_LUMINANCE4:
646 case GL_LUMINANCE8:
647 case GL_LUMINANCE12:
648 case GL_LUMINANCE16:
649 case 2:
650 case GL_LUMINANCE_ALPHA:
651 case GL_SLUMINANCE_ALPHA:
652 case GL_LUMINANCE4_ALPHA4:
653 case GL_LUMINANCE6_ALPHA2:
654 case GL_LUMINANCE8_ALPHA8:
655 case GL_LUMINANCE12_ALPHA4:
656 case GL_LUMINANCE12_ALPHA12:
657 case GL_LUMINANCE16_ALPHA16:
658 case GL_INTENSITY:
659 case GL_INTENSITY4:
660 case GL_INTENSITY8:
661 case GL_INTENSITY12:
662 case GL_INTENSITY16:
663 case GL_R8:
664 case GL_R16:
665 case GL_RG:
666 case GL_RG8:
667 case GL_RG16:
668 case 3:
669 case GL_RGB:
670 case GL_BGR:
671 case GL_SRGB:
672 case GL_R3_G3_B2:
673 case GL_RGB4:
674 case GL_RGB5:
675 case GL_RGB565:
676 case GL_RGB8:
677 case GL_RGB10:
678 case GL_RGB12:
679 case GL_RGB16:
680 case 4:
681 case GL_ABGR_EXT:
682 case GL_RGBA:
683 case GL_BGRA:
684 case GL_SRGB_ALPHA:
685 case GL_RGBA2:
686 case GL_RGBA4:
687 case GL_RGB5_A1:
688 case GL_RGBA8:
689 case GL_RGB10_A2:
690 case GL_RGBA12:
691 case GL_RGBA16:
692 return GL_TRUE;
693 default:
694 return GL_FALSE;
695 }
696 }
697
698 /**
699 * Test if the given format is a SNORM (signed-normalized) format.
700 */
701 GLboolean
702 _mesa_is_enum_format_snorm(GLenum format)
703 {
704 switch (format) {
705 /* signed, normalized texture formats */
706 case GL_RED_SNORM:
707 case GL_R8_SNORM:
708 case GL_R16_SNORM:
709 case GL_RG_SNORM:
710 case GL_RG8_SNORM:
711 case GL_RG16_SNORM:
712 case GL_RGB_SNORM:
713 case GL_RGB8_SNORM:
714 case GL_RGB16_SNORM:
715 case GL_RGBA_SNORM:
716 case GL_RGBA8_SNORM:
717 case GL_RGBA16_SNORM:
718 case GL_ALPHA_SNORM:
719 case GL_ALPHA8_SNORM:
720 case GL_ALPHA16_SNORM:
721 case GL_LUMINANCE_SNORM:
722 case GL_LUMINANCE8_SNORM:
723 case GL_LUMINANCE16_SNORM:
724 case GL_LUMINANCE_ALPHA_SNORM:
725 case GL_LUMINANCE8_ALPHA8_SNORM:
726 case GL_LUMINANCE16_ALPHA16_SNORM:
727 case GL_INTENSITY_SNORM:
728 case GL_INTENSITY8_SNORM:
729 case GL_INTENSITY16_SNORM:
730 return GL_TRUE;
731 default:
732 return GL_FALSE;
733 }
734 }
735
736 /**
737 * Test if the given format is an integer (non-normalized) format.
738 */
739 GLboolean
740 _mesa_is_enum_format_unsigned_int(GLenum format)
741 {
742 switch (format) {
743 /* specific integer formats */
744 case GL_RGBA32UI_EXT:
745 case GL_RGB32UI_EXT:
746 case GL_RG32UI:
747 case GL_R32UI:
748 case GL_ALPHA32UI_EXT:
749 case GL_INTENSITY32UI_EXT:
750 case GL_LUMINANCE32UI_EXT:
751 case GL_LUMINANCE_ALPHA32UI_EXT:
752 case GL_RGBA16UI_EXT:
753 case GL_RGB16UI_EXT:
754 case GL_RG16UI:
755 case GL_R16UI:
756 case GL_ALPHA16UI_EXT:
757 case GL_INTENSITY16UI_EXT:
758 case GL_LUMINANCE16UI_EXT:
759 case GL_LUMINANCE_ALPHA16UI_EXT:
760 case GL_RGBA8UI_EXT:
761 case GL_RGB8UI_EXT:
762 case GL_RG8UI:
763 case GL_R8UI:
764 case GL_ALPHA8UI_EXT:
765 case GL_INTENSITY8UI_EXT:
766 case GL_LUMINANCE8UI_EXT:
767 case GL_LUMINANCE_ALPHA8UI_EXT:
768 case GL_RGB10_A2UI:
769 return GL_TRUE;
770 default:
771 return GL_FALSE;
772 }
773 }
774
775
776 /**
777 * Test if the given format is an integer (non-normalized) format.
778 */
779 GLboolean
780 _mesa_is_enum_format_signed_int(GLenum format)
781 {
782 switch (format) {
783 /* generic integer formats */
784 case GL_RED_INTEGER_EXT:
785 case GL_GREEN_INTEGER_EXT:
786 case GL_BLUE_INTEGER_EXT:
787 case GL_ALPHA_INTEGER_EXT:
788 case GL_RGB_INTEGER_EXT:
789 case GL_RGBA_INTEGER_EXT:
790 case GL_BGR_INTEGER_EXT:
791 case GL_BGRA_INTEGER_EXT:
792 case GL_LUMINANCE_INTEGER_EXT:
793 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
794 case GL_RG_INTEGER:
795 /* specific integer formats */
796 case GL_RGBA32I_EXT:
797 case GL_RGB32I_EXT:
798 case GL_RG32I:
799 case GL_R32I:
800 case GL_ALPHA32I_EXT:
801 case GL_INTENSITY32I_EXT:
802 case GL_LUMINANCE32I_EXT:
803 case GL_LUMINANCE_ALPHA32I_EXT:
804 case GL_RGBA16I_EXT:
805 case GL_RGB16I_EXT:
806 case GL_RG16I:
807 case GL_R16I:
808 case GL_ALPHA16I_EXT:
809 case GL_INTENSITY16I_EXT:
810 case GL_LUMINANCE16I_EXT:
811 case GL_LUMINANCE_ALPHA16I_EXT:
812 case GL_RGBA8I_EXT:
813 case GL_RGB8I_EXT:
814 case GL_RG8I:
815 case GL_R8I:
816 case GL_ALPHA8I_EXT:
817 case GL_INTENSITY8I_EXT:
818 case GL_LUMINANCE8I_EXT:
819 case GL_LUMINANCE_ALPHA8I_EXT:
820 return GL_TRUE;
821 default:
822 return GL_FALSE;
823 }
824 }
825
826 /**
827 * Test if the given format is an ASTC 2D format.
828 */
829 static bool
830 is_astc_2d_format(GLenum internalFormat)
831 {
832 switch (internalFormat) {
833 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
834 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
835 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
844 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
845 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
846 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
847 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
848 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
858 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
859 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
860 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
861 return true;
862 default:
863 return false;
864 }
865 }
866
867 /**
868 * Test if the given format is an ASTC 3D format.
869 */
870 static bool
871 is_astc_3d_format(GLenum internalFormat)
872 {
873 switch (internalFormat) {
874 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
875 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
876 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
877 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
878 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
879 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
880 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
881 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
882 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
883 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
884 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
885 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
886 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
887 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
888 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
889 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
890 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
891 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
892 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
893 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
894 return true;
895 default:
896 return false;
897 }
898 }
899
900 /**
901 * Test if the given format is an ASTC format.
902 */
903 GLboolean
904 _mesa_is_astc_format(GLenum internalFormat)
905 {
906 return is_astc_2d_format(internalFormat) ||
907 is_astc_3d_format(internalFormat);
908 }
909
910 /**
911 * Test if the given format is an ETC2 format.
912 */
913 GLboolean
914 _mesa_is_etc2_format(GLenum internalFormat)
915 {
916 switch (internalFormat) {
917 case GL_COMPRESSED_RGB8_ETC2:
918 case GL_COMPRESSED_SRGB8_ETC2:
919 case GL_COMPRESSED_RGBA8_ETC2_EAC:
920 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
921 case GL_COMPRESSED_R11_EAC:
922 case GL_COMPRESSED_RG11_EAC:
923 case GL_COMPRESSED_SIGNED_R11_EAC:
924 case GL_COMPRESSED_SIGNED_RG11_EAC:
925 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
926 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
927 return true;
928 default:
929 return false;
930 }
931 }
932
933 /**
934 * Test if the given format is an integer (non-normalized) format.
935 */
936 GLboolean
937 _mesa_is_enum_format_integer(GLenum format)
938 {
939 return _mesa_is_enum_format_unsigned_int(format) ||
940 _mesa_is_enum_format_signed_int(format);
941 }
942
943
944 GLboolean
945 _mesa_is_type_unsigned(GLenum type)
946 {
947 switch (type) {
948 case GL_UNSIGNED_INT:
949 case GL_UNSIGNED_INT_8_8_8_8:
950 case GL_UNSIGNED_INT_8_8_8_8_REV:
951 case GL_UNSIGNED_INT_10_10_10_2:
952 case GL_UNSIGNED_INT_2_10_10_10_REV:
953
954 case GL_UNSIGNED_SHORT:
955 case GL_UNSIGNED_SHORT_4_4_4_4:
956 case GL_UNSIGNED_SHORT_5_5_5_1:
957 case GL_UNSIGNED_SHORT_5_6_5:
958 case GL_UNSIGNED_SHORT_5_6_5_REV:
959 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
960 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
961 case GL_UNSIGNED_SHORT_8_8_MESA:
962 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
963
964 case GL_UNSIGNED_BYTE:
965 case GL_UNSIGNED_BYTE_3_3_2:
966 case GL_UNSIGNED_BYTE_2_3_3_REV:
967 return GL_TRUE;
968
969 default:
970 return GL_FALSE;
971 }
972 }
973
974
975 /**
976 * Test if the given image format is a color/RGBA format (i.e., not color
977 * index, depth, stencil, etc).
978 * \param format the image format value (may by an internal texture format)
979 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
980 */
981 GLboolean
982 _mesa_is_color_format(GLenum format)
983 {
984 switch (format) {
985 case GL_RED:
986 case GL_GREEN:
987 case GL_BLUE:
988 case GL_ALPHA:
989 case GL_ALPHA4:
990 case GL_ALPHA8:
991 case GL_ALPHA12:
992 case GL_ALPHA16:
993 case 1:
994 case GL_LUMINANCE:
995 case GL_LUMINANCE4:
996 case GL_LUMINANCE8:
997 case GL_LUMINANCE12:
998 case GL_LUMINANCE16:
999 case 2:
1000 case GL_LUMINANCE_ALPHA:
1001 case GL_LUMINANCE4_ALPHA4:
1002 case GL_LUMINANCE6_ALPHA2:
1003 case GL_LUMINANCE8_ALPHA8:
1004 case GL_LUMINANCE12_ALPHA4:
1005 case GL_LUMINANCE12_ALPHA12:
1006 case GL_LUMINANCE16_ALPHA16:
1007 case GL_INTENSITY:
1008 case GL_INTENSITY4:
1009 case GL_INTENSITY8:
1010 case GL_INTENSITY12:
1011 case GL_INTENSITY16:
1012 case GL_R8:
1013 case GL_R16:
1014 case GL_RG:
1015 case GL_RG8:
1016 case GL_RG16:
1017 case 3:
1018 case GL_RGB:
1019 case GL_BGR:
1020 case GL_R3_G3_B2:
1021 case GL_RGB4:
1022 case GL_RGB5:
1023 case GL_RGB565:
1024 case GL_RGB8:
1025 case GL_RGB10:
1026 case GL_RGB12:
1027 case GL_RGB16:
1028 case 4:
1029 case GL_ABGR_EXT:
1030 case GL_RGBA:
1031 case GL_BGRA:
1032 case GL_RGBA2:
1033 case GL_RGBA4:
1034 case GL_RGB5_A1:
1035 case GL_RGBA8:
1036 case GL_RGB10_A2:
1037 case GL_RGBA12:
1038 case GL_RGBA16:
1039 /* float texture formats */
1040 case GL_ALPHA16F_ARB:
1041 case GL_ALPHA32F_ARB:
1042 case GL_LUMINANCE16F_ARB:
1043 case GL_LUMINANCE32F_ARB:
1044 case GL_LUMINANCE_ALPHA16F_ARB:
1045 case GL_LUMINANCE_ALPHA32F_ARB:
1046 case GL_INTENSITY16F_ARB:
1047 case GL_INTENSITY32F_ARB:
1048 case GL_R16F:
1049 case GL_R32F:
1050 case GL_RG16F:
1051 case GL_RG32F:
1052 case GL_RGB16F_ARB:
1053 case GL_RGB32F_ARB:
1054 case GL_RGBA16F_ARB:
1055 case GL_RGBA32F_ARB:
1056 /* compressed formats */
1057 case GL_COMPRESSED_ALPHA:
1058 case GL_COMPRESSED_LUMINANCE:
1059 case GL_COMPRESSED_LUMINANCE_ALPHA:
1060 case GL_COMPRESSED_INTENSITY:
1061 case GL_COMPRESSED_RED:
1062 case GL_COMPRESSED_RG:
1063 case GL_COMPRESSED_RGB:
1064 case GL_COMPRESSED_RGBA:
1065 case GL_RGB_S3TC:
1066 case GL_RGB4_S3TC:
1067 case GL_RGBA_S3TC:
1068 case GL_RGBA4_S3TC:
1069 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1070 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1071 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1072 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1073 case GL_COMPRESSED_RGB_FXT1_3DFX:
1074 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1075 case GL_SRGB_EXT:
1076 case GL_SRGB8_EXT:
1077 case GL_SRGB_ALPHA_EXT:
1078 case GL_SRGB8_ALPHA8_EXT:
1079 case GL_SLUMINANCE_ALPHA_EXT:
1080 case GL_SLUMINANCE8_ALPHA8_EXT:
1081 case GL_SLUMINANCE_EXT:
1082 case GL_SLUMINANCE8_EXT:
1083 case GL_COMPRESSED_SRGB_EXT:
1084 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1085 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1086 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1087 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1088 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1089 case GL_COMPRESSED_SLUMINANCE_EXT:
1090 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1091 case GL_COMPRESSED_RED_RGTC1:
1092 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1093 case GL_COMPRESSED_RG_RGTC2:
1094 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1095 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1096 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1097 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1098 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1099 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1100 case GL_ETC1_RGB8_OES:
1101 case GL_COMPRESSED_RGB8_ETC2:
1102 case GL_COMPRESSED_SRGB8_ETC2:
1103 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1104 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1105 case GL_COMPRESSED_R11_EAC:
1106 case GL_COMPRESSED_RG11_EAC:
1107 case GL_COMPRESSED_SIGNED_R11_EAC:
1108 case GL_COMPRESSED_SIGNED_RG11_EAC:
1109 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1110 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1111 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1112 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1113 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1114 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1115 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1116 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1117 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1118 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1119 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1120 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1121 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1122 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1123 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1124 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1125 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1126 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1127 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1128 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1129 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1130 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1131 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1132 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1133 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1134 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1135 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1136 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1137 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1138 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1139 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1140 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1141 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1142 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1143 /* generic integer formats */
1144 case GL_RED_INTEGER_EXT:
1145 case GL_GREEN_INTEGER_EXT:
1146 case GL_BLUE_INTEGER_EXT:
1147 case GL_ALPHA_INTEGER_EXT:
1148 case GL_RGB_INTEGER_EXT:
1149 case GL_RGBA_INTEGER_EXT:
1150 case GL_BGR_INTEGER_EXT:
1151 case GL_BGRA_INTEGER_EXT:
1152 case GL_RG_INTEGER:
1153 case GL_LUMINANCE_INTEGER_EXT:
1154 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1155 /* sized integer formats */
1156 case GL_RGBA32UI_EXT:
1157 case GL_RGB32UI_EXT:
1158 case GL_RG32UI:
1159 case GL_R32UI:
1160 case GL_ALPHA32UI_EXT:
1161 case GL_INTENSITY32UI_EXT:
1162 case GL_LUMINANCE32UI_EXT:
1163 case GL_LUMINANCE_ALPHA32UI_EXT:
1164 case GL_RGBA16UI_EXT:
1165 case GL_RGB16UI_EXT:
1166 case GL_RG16UI:
1167 case GL_R16UI:
1168 case GL_ALPHA16UI_EXT:
1169 case GL_INTENSITY16UI_EXT:
1170 case GL_LUMINANCE16UI_EXT:
1171 case GL_LUMINANCE_ALPHA16UI_EXT:
1172 case GL_RGBA8UI_EXT:
1173 case GL_RGB8UI_EXT:
1174 case GL_RG8UI:
1175 case GL_R8UI:
1176 case GL_ALPHA8UI_EXT:
1177 case GL_INTENSITY8UI_EXT:
1178 case GL_LUMINANCE8UI_EXT:
1179 case GL_LUMINANCE_ALPHA8UI_EXT:
1180 case GL_RGBA32I_EXT:
1181 case GL_RGB32I_EXT:
1182 case GL_RG32I:
1183 case GL_R32I:
1184 case GL_ALPHA32I_EXT:
1185 case GL_INTENSITY32I_EXT:
1186 case GL_LUMINANCE32I_EXT:
1187 case GL_LUMINANCE_ALPHA32I_EXT:
1188 case GL_RGBA16I_EXT:
1189 case GL_RGB16I_EXT:
1190 case GL_RG16I:
1191 case GL_R16I:
1192 case GL_ALPHA16I_EXT:
1193 case GL_INTENSITY16I_EXT:
1194 case GL_LUMINANCE16I_EXT:
1195 case GL_LUMINANCE_ALPHA16I_EXT:
1196 case GL_RGBA8I_EXT:
1197 case GL_RGB8I_EXT:
1198 case GL_RG8I:
1199 case GL_R8I:
1200 case GL_ALPHA8I_EXT:
1201 case GL_INTENSITY8I_EXT:
1202 case GL_LUMINANCE8I_EXT:
1203 case GL_LUMINANCE_ALPHA8I_EXT:
1204 /* signed, normalized texture formats */
1205 case GL_RED_SNORM:
1206 case GL_R8_SNORM:
1207 case GL_R16_SNORM:
1208 case GL_RG_SNORM:
1209 case GL_RG8_SNORM:
1210 case GL_RG16_SNORM:
1211 case GL_RGB_SNORM:
1212 case GL_RGB8_SNORM:
1213 case GL_RGB16_SNORM:
1214 case GL_RGBA_SNORM:
1215 case GL_RGBA8_SNORM:
1216 case GL_RGBA16_SNORM:
1217 case GL_ALPHA_SNORM:
1218 case GL_ALPHA8_SNORM:
1219 case GL_ALPHA16_SNORM:
1220 case GL_LUMINANCE_SNORM:
1221 case GL_LUMINANCE8_SNORM:
1222 case GL_LUMINANCE16_SNORM:
1223 case GL_LUMINANCE_ALPHA_SNORM:
1224 case GL_LUMINANCE8_ALPHA8_SNORM:
1225 case GL_LUMINANCE16_ALPHA16_SNORM:
1226 case GL_INTENSITY_SNORM:
1227 case GL_INTENSITY8_SNORM:
1228 case GL_INTENSITY16_SNORM:
1229 case GL_RGB9_E5:
1230 case GL_R11F_G11F_B10F:
1231 case GL_RGB10_A2UI:
1232 return GL_TRUE;
1233 case GL_YCBCR_MESA: /* not considered to be RGB */
1234 /* fall-through */
1235 default:
1236 return GL_FALSE;
1237 }
1238 }
1239
1240
1241 /**
1242 * Test if the given image format is a depth component format.
1243 */
1244 GLboolean
1245 _mesa_is_depth_format(GLenum format)
1246 {
1247 switch (format) {
1248 case GL_DEPTH_COMPONENT:
1249 case GL_DEPTH_COMPONENT16:
1250 case GL_DEPTH_COMPONENT24:
1251 case GL_DEPTH_COMPONENT32:
1252 case GL_DEPTH_COMPONENT32F:
1253 return GL_TRUE;
1254 default:
1255 return GL_FALSE;
1256 }
1257 }
1258
1259
1260 /**
1261 * Test if the given image format is a stencil format.
1262 */
1263 GLboolean
1264 _mesa_is_stencil_format(GLenum format)
1265 {
1266 switch (format) {
1267 case GL_STENCIL_INDEX:
1268 return GL_TRUE;
1269 default:
1270 return GL_FALSE;
1271 }
1272 }
1273
1274
1275 /**
1276 * Test if the given image format is a YCbCr format.
1277 */
1278 GLboolean
1279 _mesa_is_ycbcr_format(GLenum format)
1280 {
1281 switch (format) {
1282 case GL_YCBCR_MESA:
1283 return GL_TRUE;
1284 default:
1285 return GL_FALSE;
1286 }
1287 }
1288
1289
1290 /**
1291 * Test if the given image format is a depth+stencil format.
1292 */
1293 GLboolean
1294 _mesa_is_depthstencil_format(GLenum format)
1295 {
1296 switch (format) {
1297 case GL_DEPTH24_STENCIL8_EXT:
1298 case GL_DEPTH_STENCIL_EXT:
1299 case GL_DEPTH32F_STENCIL8:
1300 return GL_TRUE;
1301 default:
1302 return GL_FALSE;
1303 }
1304 }
1305
1306
1307 /**
1308 * Test if the given image format is a depth or stencil format.
1309 */
1310 GLboolean
1311 _mesa_is_depth_or_stencil_format(GLenum format)
1312 {
1313 switch (format) {
1314 case GL_DEPTH_COMPONENT:
1315 case GL_DEPTH_COMPONENT16:
1316 case GL_DEPTH_COMPONENT24:
1317 case GL_DEPTH_COMPONENT32:
1318 case GL_STENCIL_INDEX:
1319 case GL_STENCIL_INDEX1_EXT:
1320 case GL_STENCIL_INDEX4_EXT:
1321 case GL_STENCIL_INDEX8_EXT:
1322 case GL_STENCIL_INDEX16_EXT:
1323 case GL_DEPTH_STENCIL_EXT:
1324 case GL_DEPTH24_STENCIL8_EXT:
1325 case GL_DEPTH_COMPONENT32F:
1326 case GL_DEPTH32F_STENCIL8:
1327 return GL_TRUE;
1328 default:
1329 return GL_FALSE;
1330 }
1331 }
1332
1333
1334 /**
1335 * Test if an image format is a supported compressed format.
1336 * \param format the internal format token provided by the user.
1337 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1338 */
1339 GLboolean
1340 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1341 {
1342 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1343
1344 /* Some formats in this switch have an equivalent mesa_format_layout
1345 * to the compressed formats in the layout switch below and thus
1346 * must be handled first.
1347 */
1348 switch (format) {
1349 case GL_RGB_S3TC:
1350 case GL_RGB4_S3TC:
1351 case GL_RGBA_S3TC:
1352 case GL_RGBA4_S3TC:
1353 return _mesa_is_desktop_gl(ctx) &&
1354 ctx->Extensions.ANGLE_texture_compression_dxt;
1355 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1356 return ctx->API == API_OPENGL_COMPAT
1357 && ctx->Extensions.ATI_texture_compression_3dc;
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 /* Assume that the ANGLE flag will always be set if the
1375 * EXT flag is set.
1376 */
1377 return ctx->Extensions.ANGLE_texture_compression_dxt;
1378 } else {
1379 return _mesa_is_desktop_gl(ctx)
1380 && ctx->Extensions.EXT_texture_sRGB
1381 && ctx->Extensions.EXT_texture_compression_s3tc;
1382 }
1383 case MESA_FORMAT_LAYOUT_FXT1:
1384 return _mesa_is_desktop_gl(ctx)
1385 && ctx->Extensions.TDFX_texture_compression_FXT1;
1386 case MESA_FORMAT_LAYOUT_RGTC:
1387 return _mesa_is_desktop_gl(ctx)
1388 && ctx->Extensions.ARB_texture_compression_rgtc;
1389 case MESA_FORMAT_LAYOUT_LATC:
1390 return ctx->API == API_OPENGL_COMPAT
1391 && ctx->Extensions.EXT_texture_compression_latc;
1392 case MESA_FORMAT_LAYOUT_ETC1:
1393 return _mesa_is_gles(ctx)
1394 && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
1395 case MESA_FORMAT_LAYOUT_ETC2:
1396 return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
1397 case MESA_FORMAT_LAYOUT_BPTC:
1398 return _mesa_is_desktop_gl(ctx) &&
1399 ctx->Extensions.ARB_texture_compression_bptc;
1400 case MESA_FORMAT_LAYOUT_ASTC:
1401 return ctx->Extensions.KHR_texture_compression_astc_ldr;
1402 default:
1403 return GL_FALSE;
1404 }
1405 }
1406
1407 /**
1408 * Test if the given format represents an sRGB format.
1409 * \param format the GL format (can be an internal format)
1410 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1411 */
1412 GLboolean
1413 _mesa_is_srgb_format(GLenum format)
1414 {
1415 switch (format) {
1416 case GL_SRGB:
1417 case GL_SRGB8:
1418 case GL_SRGB_ALPHA:
1419 case GL_SRGB8_ALPHA8:
1420 case GL_COMPRESSED_SRGB:
1421 case GL_COMPRESSED_SRGB_ALPHA:
1422 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1423 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1424 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1425 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1426 case GL_COMPRESSED_SRGB8_ETC2:
1427 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1428 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1429 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1430 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1431 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1432 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1433 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1434 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1435 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1436 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1437 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1438 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1439 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1440 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1441 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1442 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1443 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1444 return GL_TRUE;
1445 default:
1446 break;
1447 }
1448
1449 return GL_FALSE;
1450 }
1451
1452 /**
1453 * Convert various unpack formats to the corresponding base format.
1454 */
1455 GLenum
1456 _mesa_unpack_format_to_base_format(GLenum format)
1457 {
1458 switch(format) {
1459 case GL_RED_INTEGER:
1460 return GL_RED;
1461 case GL_GREEN_INTEGER:
1462 return GL_GREEN;
1463 case GL_BLUE_INTEGER:
1464 return GL_BLUE;
1465 case GL_ALPHA_INTEGER:
1466 return GL_ALPHA;
1467 case GL_RG_INTEGER:
1468 return GL_RG;
1469 case GL_RGB_INTEGER:
1470 return GL_RGB;
1471 case GL_RGBA_INTEGER:
1472 return GL_RGBA;
1473 case GL_BGR_INTEGER:
1474 return GL_BGR;
1475 case GL_BGRA_INTEGER:
1476 return GL_BGRA;
1477 case GL_LUMINANCE_INTEGER_EXT:
1478 return GL_LUMINANCE;
1479 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1480 return GL_LUMINANCE_ALPHA;
1481 case GL_RED:
1482 case GL_GREEN:
1483 case GL_BLUE:
1484 case GL_RG:
1485 case GL_RGB:
1486 case GL_RGBA:
1487 case GL_BGR:
1488 case GL_BGRA:
1489 case GL_ALPHA:
1490 case GL_LUMINANCE:
1491 case GL_LUMINANCE_ALPHA:
1492 default:
1493 return format;
1494 }
1495 }
1496
1497 /**
1498 * Convert various base formats to the corresponding integer format.
1499 */
1500 GLenum
1501 _mesa_base_format_to_integer_format(GLenum format)
1502 {
1503 switch(format) {
1504 case GL_RED:
1505 return GL_RED_INTEGER;
1506 case GL_GREEN:
1507 return GL_GREEN_INTEGER;
1508 case GL_BLUE:
1509 return GL_BLUE_INTEGER;
1510 case GL_RG:
1511 return GL_RG_INTEGER;
1512 case GL_RGB:
1513 return GL_RGB_INTEGER;
1514 case GL_RGBA:
1515 return GL_RGBA_INTEGER;
1516 case GL_BGR:
1517 return GL_BGR_INTEGER;
1518 case GL_BGRA:
1519 return GL_BGRA_INTEGER;
1520 case GL_ALPHA:
1521 return GL_ALPHA_INTEGER;
1522 case GL_LUMINANCE:
1523 return GL_LUMINANCE_INTEGER_EXT;
1524 case GL_LUMINANCE_ALPHA:
1525 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1526 }
1527
1528 return format;
1529 }
1530
1531
1532 /**
1533 * Does the given base texture/renderbuffer format have the channel
1534 * named by 'pname'?
1535 */
1536 GLboolean
1537 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1538 {
1539 switch (pname) {
1540 case GL_TEXTURE_RED_SIZE:
1541 case GL_TEXTURE_RED_TYPE:
1542 case GL_RENDERBUFFER_RED_SIZE_EXT:
1543 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1544 case GL_INTERNALFORMAT_RED_SIZE:
1545 case GL_INTERNALFORMAT_RED_TYPE:
1546 if (base_format == GL_RED ||
1547 base_format == GL_RG ||
1548 base_format == GL_RGB ||
1549 base_format == GL_RGBA) {
1550 return GL_TRUE;
1551 }
1552 return GL_FALSE;
1553 case GL_TEXTURE_GREEN_SIZE:
1554 case GL_TEXTURE_GREEN_TYPE:
1555 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1556 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1557 case GL_INTERNALFORMAT_GREEN_SIZE:
1558 case GL_INTERNALFORMAT_GREEN_TYPE:
1559 if (base_format == GL_RG ||
1560 base_format == GL_RGB ||
1561 base_format == GL_RGBA) {
1562 return GL_TRUE;
1563 }
1564 return GL_FALSE;
1565 case GL_TEXTURE_BLUE_SIZE:
1566 case GL_TEXTURE_BLUE_TYPE:
1567 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1568 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1569 case GL_INTERNALFORMAT_BLUE_SIZE:
1570 case GL_INTERNALFORMAT_BLUE_TYPE:
1571 if (base_format == GL_RGB ||
1572 base_format == GL_RGBA) {
1573 return GL_TRUE;
1574 }
1575 return GL_FALSE;
1576 case GL_TEXTURE_ALPHA_SIZE:
1577 case GL_TEXTURE_ALPHA_TYPE:
1578 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1579 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1580 case GL_INTERNALFORMAT_ALPHA_SIZE:
1581 case GL_INTERNALFORMAT_ALPHA_TYPE:
1582 if (base_format == GL_RGBA ||
1583 base_format == GL_ALPHA ||
1584 base_format == GL_LUMINANCE_ALPHA) {
1585 return GL_TRUE;
1586 }
1587 return GL_FALSE;
1588 case GL_TEXTURE_LUMINANCE_SIZE:
1589 case GL_TEXTURE_LUMINANCE_TYPE:
1590 if (base_format == GL_LUMINANCE ||
1591 base_format == GL_LUMINANCE_ALPHA) {
1592 return GL_TRUE;
1593 }
1594 return GL_FALSE;
1595 case GL_TEXTURE_INTENSITY_SIZE:
1596 case GL_TEXTURE_INTENSITY_TYPE:
1597 if (base_format == GL_INTENSITY) {
1598 return GL_TRUE;
1599 }
1600 return GL_FALSE;
1601 case GL_TEXTURE_DEPTH_SIZE:
1602 case GL_TEXTURE_DEPTH_TYPE:
1603 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1604 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1605 case GL_INTERNALFORMAT_DEPTH_SIZE:
1606 case GL_INTERNALFORMAT_DEPTH_TYPE:
1607 if (base_format == GL_DEPTH_STENCIL ||
1608 base_format == GL_DEPTH_COMPONENT) {
1609 return GL_TRUE;
1610 }
1611 return GL_FALSE;
1612 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1613 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1614 case GL_INTERNALFORMAT_STENCIL_SIZE:
1615 case GL_INTERNALFORMAT_STENCIL_TYPE:
1616 if (base_format == GL_DEPTH_STENCIL ||
1617 base_format == GL_STENCIL_INDEX) {
1618 return GL_TRUE;
1619 }
1620 return GL_FALSE;
1621 default:
1622 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1623 __func__, pname);
1624 return GL_FALSE;
1625 }
1626
1627 return GL_FALSE;
1628 }
1629
1630
1631 /**
1632 * Returns the number of channels/components for a base format.
1633 */
1634 GLint
1635 _mesa_base_format_component_count(GLenum base_format)
1636 {
1637 switch (base_format) {
1638 case GL_LUMINANCE:
1639 case GL_RED:
1640 case GL_ALPHA:
1641 case GL_INTENSITY:
1642 case GL_DEPTH_COMPONENT:
1643 return 1;
1644 case GL_RG:
1645 case GL_LUMINANCE_ALPHA:
1646 case GL_DEPTH_STENCIL:
1647 return 2;
1648 case GL_RGB:
1649 return 3;
1650 case GL_RGBA:
1651 return 4;
1652 default:
1653 return -1;
1654 }
1655 }
1656
1657
1658 /**
1659 * If format is a generic compressed format, return the corresponding
1660 * non-compressed format. For other formats, return the format as-is.
1661 */
1662 GLenum
1663 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1664 {
1665 switch (format) {
1666 case GL_COMPRESSED_RED:
1667 return GL_RED;
1668 case GL_COMPRESSED_RG:
1669 return GL_RG;
1670 case GL_COMPRESSED_RGB:
1671 return GL_RGB;
1672 case GL_COMPRESSED_RGBA:
1673 return GL_RGBA;
1674 case GL_COMPRESSED_ALPHA:
1675 return GL_ALPHA;
1676 case GL_COMPRESSED_LUMINANCE:
1677 return GL_LUMINANCE;
1678 case GL_COMPRESSED_LUMINANCE_ALPHA:
1679 return GL_LUMINANCE_ALPHA;
1680 case GL_COMPRESSED_INTENSITY:
1681 return GL_INTENSITY;
1682 /* sRGB formats */
1683 case GL_COMPRESSED_SRGB:
1684 return GL_SRGB;
1685 case GL_COMPRESSED_SRGB_ALPHA:
1686 return GL_SRGB_ALPHA;
1687 case GL_COMPRESSED_SLUMINANCE:
1688 return GL_SLUMINANCE;
1689 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1690 return GL_SLUMINANCE_ALPHA;
1691 default:
1692 return format;
1693 }
1694 }
1695
1696
1697 /**
1698 * Return the equivalent non-generic internal format.
1699 * This is useful for comparing whether two internal formats are equivalent.
1700 */
1701 GLenum
1702 _mesa_get_nongeneric_internalformat(GLenum format)
1703 {
1704 switch (format) {
1705 /* GL 1.1 formats. */
1706 case 4:
1707 case GL_RGBA:
1708 return GL_RGBA8;
1709 case 3:
1710 case GL_RGB:
1711 return GL_RGB8;
1712 case 2:
1713 case GL_LUMINANCE_ALPHA:
1714 return GL_LUMINANCE8_ALPHA8;
1715 case 1:
1716 case GL_LUMINANCE:
1717 return GL_LUMINANCE8;
1718 case GL_ALPHA:
1719 return GL_ALPHA8;
1720 case GL_INTENSITY:
1721 return GL_INTENSITY8;
1722
1723 /* GL_ARB_texture_rg */
1724 case GL_RED:
1725 return GL_R8;
1726 case GL_RG:
1727 return GL_RG8;
1728
1729 /* GL_EXT_texture_sRGB */
1730 case GL_SRGB:
1731 return GL_SRGB8;
1732 case GL_SRGB_ALPHA:
1733 return GL_SRGB8_ALPHA8;
1734 case GL_SLUMINANCE:
1735 return GL_SLUMINANCE8;
1736 case GL_SLUMINANCE_ALPHA:
1737 return GL_SLUMINANCE8_ALPHA8;
1738
1739 /* GL_EXT_texture_snorm */
1740 case GL_RGBA_SNORM:
1741 return GL_RGBA8_SNORM;
1742 case GL_RGB_SNORM:
1743 return GL_RGB8_SNORM;
1744 case GL_RG_SNORM:
1745 return GL_RG8_SNORM;
1746 case GL_RED_SNORM:
1747 return GL_R8_SNORM;
1748 case GL_LUMINANCE_ALPHA_SNORM:
1749 return GL_LUMINANCE8_ALPHA8_SNORM;
1750 case GL_LUMINANCE_SNORM:
1751 return GL_LUMINANCE8_SNORM;
1752 case GL_ALPHA_SNORM:
1753 return GL_ALPHA8_SNORM;
1754 case GL_INTENSITY_SNORM:
1755 return GL_INTENSITY8_SNORM;
1756
1757 default:
1758 return format;
1759 }
1760 }
1761
1762
1763 /**
1764 * Convert an sRGB internal format to linear.
1765 */
1766 GLenum
1767 _mesa_get_linear_internalformat(GLenum format)
1768 {
1769 switch (format) {
1770 case GL_SRGB:
1771 return GL_RGB;
1772 case GL_SRGB_ALPHA:
1773 return GL_RGBA;
1774 case GL_SRGB8:
1775 return GL_RGB8;
1776 case GL_SRGB8_ALPHA8:
1777 return GL_RGBA8;
1778 case GL_SLUMINANCE8:
1779 return GL_LUMINANCE8;
1780 case GL_SLUMINANCE:
1781 return GL_LUMINANCE;
1782 case GL_SLUMINANCE_ALPHA:
1783 return GL_LUMINANCE_ALPHA;
1784 case GL_SLUMINANCE8_ALPHA8:
1785 return GL_LUMINANCE8_ALPHA8;
1786 default:
1787 return format;
1788 }
1789 }
1790
1791
1792 /**
1793 * Do error checking of format/type combinations for glReadPixels,
1794 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1795 * and type values, we may either generate GL_INVALID_OPERATION or
1796 * GL_INVALID_ENUM.
1797 *
1798 * \param format pixel format.
1799 * \param type pixel type.
1800 *
1801 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1802 */
1803 GLenum
1804 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1805 GLenum format, GLenum type)
1806 {
1807 /* From OpenGL 3.3 spec, page 220:
1808 * "If the format is DEPTH_STENCIL, then values are taken from
1809 * both the depth buffer and the stencil buffer. If there is no
1810 * depth buffer or if there is no stencil buffer, then the error
1811 * INVALID_OPERATION occurs. If the type parameter is not
1812 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1813 * error INVALID_ENUM occurs."
1814 *
1815 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1816 * cannot be used to read depth or stencil in that API.
1817 */
1818 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1819 && type != GL_UNSIGNED_INT_24_8
1820 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1821 return GL_INVALID_ENUM;
1822
1823 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1824 switch (type) {
1825 case GL_BITMAP:
1826 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1827 return GL_INVALID_ENUM;
1828 }
1829 break;
1830
1831 case GL_UNSIGNED_BYTE_3_3_2:
1832 case GL_UNSIGNED_BYTE_2_3_3_REV:
1833 case GL_UNSIGNED_SHORT_5_6_5:
1834 case GL_UNSIGNED_SHORT_5_6_5_REV:
1835 if (format == GL_RGB) {
1836 break; /* OK */
1837 }
1838 if (format == GL_RGB_INTEGER_EXT &&
1839 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1840 break; /* OK */
1841 }
1842 return GL_INVALID_OPERATION;
1843
1844 case GL_UNSIGNED_SHORT_4_4_4_4:
1845 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1846 case GL_UNSIGNED_INT_8_8_8_8:
1847 case GL_UNSIGNED_INT_8_8_8_8_REV:
1848 if (format == GL_RGBA ||
1849 format == GL_BGRA ||
1850 format == GL_ABGR_EXT) {
1851 break; /* OK */
1852 }
1853 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1854 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1855 break; /* OK */
1856 }
1857 return GL_INVALID_OPERATION;
1858
1859 case GL_UNSIGNED_SHORT_5_5_5_1:
1860 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1861 case GL_UNSIGNED_INT_10_10_10_2:
1862 case GL_UNSIGNED_INT_2_10_10_10_REV:
1863 if (format == GL_RGBA ||
1864 format == GL_BGRA) {
1865 break; /* OK */
1866 }
1867 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1868 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1869 break; /* OK */
1870 }
1871 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1872 ctx->API == API_OPENGLES2) {
1873 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1874 }
1875 return GL_INVALID_OPERATION;
1876
1877 case GL_UNSIGNED_INT_24_8:
1878 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1879 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1880 return GL_NO_ERROR;
1881
1882 if (format != GL_DEPTH_STENCIL) {
1883 return GL_INVALID_OPERATION;
1884 }
1885 return GL_NO_ERROR;
1886
1887 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1888 if (!ctx->Extensions.ARB_depth_buffer_float) {
1889 return GL_INVALID_ENUM;
1890 }
1891 if (format != GL_DEPTH_STENCIL) {
1892 return GL_INVALID_OPERATION;
1893 }
1894 return GL_NO_ERROR;
1895
1896 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1897 if (!ctx->Extensions.EXT_packed_float) {
1898 return GL_INVALID_ENUM;
1899 }
1900 if (format != GL_RGB) {
1901 return GL_INVALID_OPERATION;
1902 }
1903 return GL_NO_ERROR;
1904
1905 case GL_HALF_FLOAT_OES:
1906 switch (format) {
1907 case GL_RGBA:
1908 case GL_RGB:
1909 case GL_LUMINANCE_ALPHA:
1910 case GL_LUMINANCE:
1911 case GL_ALPHA:
1912 return GL_NO_ERROR;
1913 case GL_RG:
1914 case GL_RED:
1915 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1916 return GL_NO_ERROR;
1917 default:
1918 return GL_INVALID_OPERATION;
1919 }
1920
1921 default:
1922 ; /* fall-through */
1923 }
1924
1925 /* now, for each format, check the type for compatibility */
1926 switch (format) {
1927 case GL_COLOR_INDEX:
1928 case GL_STENCIL_INDEX:
1929 switch (type) {
1930 case GL_BITMAP:
1931 case GL_BYTE:
1932 case GL_UNSIGNED_BYTE:
1933 case GL_SHORT:
1934 case GL_UNSIGNED_SHORT:
1935 case GL_INT:
1936 case GL_UNSIGNED_INT:
1937 case GL_FLOAT:
1938 case GL_HALF_FLOAT:
1939 return GL_NO_ERROR;
1940 default:
1941 return GL_INVALID_ENUM;
1942 }
1943
1944 case GL_RED:
1945 case GL_GREEN:
1946 case GL_BLUE:
1947 case GL_ALPHA:
1948 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1949 case GL_INTENSITY:
1950 #endif
1951 case GL_LUMINANCE:
1952 case GL_LUMINANCE_ALPHA:
1953 case GL_DEPTH_COMPONENT:
1954 switch (type) {
1955 case GL_BYTE:
1956 case GL_UNSIGNED_BYTE:
1957 case GL_SHORT:
1958 case GL_UNSIGNED_SHORT:
1959 case GL_INT:
1960 case GL_UNSIGNED_INT:
1961 case GL_FLOAT:
1962 case GL_HALF_FLOAT:
1963 return GL_NO_ERROR;
1964 default:
1965 return GL_INVALID_ENUM;
1966 }
1967
1968 case GL_RG:
1969 if (!ctx->Extensions.ARB_texture_rg)
1970 return GL_INVALID_ENUM;
1971 switch (type) {
1972 case GL_BYTE:
1973 case GL_UNSIGNED_BYTE:
1974 case GL_SHORT:
1975 case GL_UNSIGNED_SHORT:
1976 case GL_INT:
1977 case GL_UNSIGNED_INT:
1978 case GL_FLOAT:
1979 case GL_HALF_FLOAT:
1980 return GL_NO_ERROR;
1981 default:
1982 return GL_INVALID_ENUM;
1983 }
1984
1985 case GL_RGB:
1986 switch (type) {
1987 case GL_BYTE:
1988 case GL_UNSIGNED_BYTE:
1989 case GL_SHORT:
1990 case GL_UNSIGNED_SHORT:
1991 case GL_INT:
1992 case GL_UNSIGNED_INT:
1993 case GL_FLOAT:
1994 case GL_UNSIGNED_BYTE_3_3_2:
1995 case GL_UNSIGNED_BYTE_2_3_3_REV:
1996 case GL_UNSIGNED_SHORT_5_6_5:
1997 case GL_UNSIGNED_SHORT_5_6_5_REV:
1998 case GL_HALF_FLOAT:
1999 return GL_NO_ERROR;
2000 case GL_UNSIGNED_INT_2_10_10_10_REV:
2001 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
2002 return (ctx->API == API_OPENGLES2)
2003 ? GL_NO_ERROR : GL_INVALID_ENUM;
2004 case GL_UNSIGNED_INT_5_9_9_9_REV:
2005 return ctx->Extensions.EXT_texture_shared_exponent
2006 ? GL_NO_ERROR : GL_INVALID_ENUM;
2007 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2008 return ctx->Extensions.EXT_packed_float
2009 ? GL_NO_ERROR : GL_INVALID_ENUM;
2010 default:
2011 return GL_INVALID_ENUM;
2012 }
2013
2014 case GL_BGR:
2015 switch (type) {
2016 /* NOTE: no packed types are supported with BGR. That's
2017 * intentional, according to the GL spec.
2018 */
2019 case GL_BYTE:
2020 case GL_UNSIGNED_BYTE:
2021 case GL_SHORT:
2022 case GL_UNSIGNED_SHORT:
2023 case GL_INT:
2024 case GL_UNSIGNED_INT:
2025 case GL_FLOAT:
2026 case GL_HALF_FLOAT:
2027 return GL_NO_ERROR;
2028 default:
2029 return GL_INVALID_ENUM;
2030 }
2031
2032 case GL_RGBA:
2033 case GL_BGRA:
2034 switch (type) {
2035 case GL_BYTE:
2036 case GL_UNSIGNED_BYTE:
2037 case GL_SHORT:
2038 case GL_UNSIGNED_SHORT:
2039 case GL_INT:
2040 case GL_UNSIGNED_INT:
2041 case GL_FLOAT:
2042 case GL_UNSIGNED_SHORT_4_4_4_4:
2043 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2044 case GL_UNSIGNED_SHORT_5_5_5_1:
2045 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2046 case GL_UNSIGNED_INT_8_8_8_8:
2047 case GL_UNSIGNED_INT_8_8_8_8_REV:
2048 case GL_UNSIGNED_INT_10_10_10_2:
2049 case GL_UNSIGNED_INT_2_10_10_10_REV:
2050 case GL_HALF_FLOAT:
2051 return GL_NO_ERROR;
2052 default:
2053 return GL_INVALID_ENUM;
2054 }
2055
2056 case GL_ABGR_EXT:
2057 switch (type) {
2058 case GL_BYTE:
2059 case GL_UNSIGNED_BYTE:
2060 case GL_SHORT:
2061 case GL_UNSIGNED_SHORT:
2062 case GL_INT:
2063 case GL_UNSIGNED_INT:
2064 case GL_FLOAT:
2065 case GL_UNSIGNED_SHORT_4_4_4_4:
2066 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2067 case GL_UNSIGNED_INT_8_8_8_8:
2068 case GL_UNSIGNED_INT_8_8_8_8_REV:
2069 case GL_HALF_FLOAT:
2070 return GL_NO_ERROR;
2071 default:
2072 return GL_INVALID_ENUM;
2073 }
2074
2075 case GL_YCBCR_MESA:
2076 if (!ctx->Extensions.MESA_ycbcr_texture)
2077 return GL_INVALID_ENUM;
2078 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2079 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2080 return GL_NO_ERROR;
2081 else
2082 return GL_INVALID_OPERATION;
2083
2084 case GL_DEPTH_STENCIL:
2085 if (type == GL_UNSIGNED_INT_24_8)
2086 return GL_NO_ERROR;
2087 else if (ctx->Extensions.ARB_depth_buffer_float &&
2088 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2089 return GL_NO_ERROR;
2090 else
2091 return GL_INVALID_ENUM;
2092
2093 /* integer-valued formats */
2094 case GL_RED_INTEGER_EXT:
2095 case GL_GREEN_INTEGER_EXT:
2096 case GL_BLUE_INTEGER_EXT:
2097 case GL_ALPHA_INTEGER_EXT:
2098 case GL_RG_INTEGER:
2099 switch (type) {
2100 case GL_BYTE:
2101 case GL_UNSIGNED_BYTE:
2102 case GL_SHORT:
2103 case GL_UNSIGNED_SHORT:
2104 case GL_INT:
2105 case GL_UNSIGNED_INT:
2106 return (ctx->Version >= 30 ||
2107 ctx->Extensions.EXT_texture_integer)
2108 ? GL_NO_ERROR : GL_INVALID_ENUM;
2109 default:
2110 return GL_INVALID_ENUM;
2111 }
2112
2113 case GL_RGB_INTEGER_EXT:
2114 switch (type) {
2115 case GL_BYTE:
2116 case GL_UNSIGNED_BYTE:
2117 case GL_SHORT:
2118 case GL_UNSIGNED_SHORT:
2119 case GL_INT:
2120 case GL_UNSIGNED_INT:
2121 return (ctx->Version >= 30 ||
2122 ctx->Extensions.EXT_texture_integer)
2123 ? GL_NO_ERROR : GL_INVALID_ENUM;
2124 case GL_UNSIGNED_BYTE_3_3_2:
2125 case GL_UNSIGNED_BYTE_2_3_3_REV:
2126 case GL_UNSIGNED_SHORT_5_6_5:
2127 case GL_UNSIGNED_SHORT_5_6_5_REV:
2128 return ctx->Extensions.ARB_texture_rgb10_a2ui
2129 ? GL_NO_ERROR : GL_INVALID_ENUM;
2130 default:
2131 return GL_INVALID_ENUM;
2132 }
2133
2134 case GL_BGR_INTEGER_EXT:
2135 switch (type) {
2136 case GL_BYTE:
2137 case GL_UNSIGNED_BYTE:
2138 case GL_SHORT:
2139 case GL_UNSIGNED_SHORT:
2140 case GL_INT:
2141 case GL_UNSIGNED_INT:
2142 /* NOTE: no packed formats w/ BGR format */
2143 return (ctx->Version >= 30 ||
2144 ctx->Extensions.EXT_texture_integer)
2145 ? GL_NO_ERROR : GL_INVALID_ENUM;
2146 default:
2147 return GL_INVALID_ENUM;
2148 }
2149
2150 case GL_RGBA_INTEGER_EXT:
2151 case GL_BGRA_INTEGER_EXT:
2152 switch (type) {
2153 case GL_BYTE:
2154 case GL_UNSIGNED_BYTE:
2155 case GL_SHORT:
2156 case GL_UNSIGNED_SHORT:
2157 case GL_INT:
2158 case GL_UNSIGNED_INT:
2159 return (ctx->Version >= 30 ||
2160 ctx->Extensions.EXT_texture_integer)
2161 ? GL_NO_ERROR : GL_INVALID_ENUM;
2162 case GL_UNSIGNED_SHORT_4_4_4_4:
2163 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2164 case GL_UNSIGNED_SHORT_5_5_5_1:
2165 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2166 case GL_UNSIGNED_INT_8_8_8_8:
2167 case GL_UNSIGNED_INT_8_8_8_8_REV:
2168 case GL_UNSIGNED_INT_10_10_10_2:
2169 case GL_UNSIGNED_INT_2_10_10_10_REV:
2170 return ctx->Extensions.ARB_texture_rgb10_a2ui
2171 ? GL_NO_ERROR : GL_INVALID_ENUM;
2172 default:
2173 return GL_INVALID_ENUM;
2174 }
2175
2176 case GL_LUMINANCE_INTEGER_EXT:
2177 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2178 switch (type) {
2179 case GL_BYTE:
2180 case GL_UNSIGNED_BYTE:
2181 case GL_SHORT:
2182 case GL_UNSIGNED_SHORT:
2183 case GL_INT:
2184 case GL_UNSIGNED_INT:
2185 return ctx->Extensions.EXT_texture_integer
2186 ? GL_NO_ERROR : GL_INVALID_ENUM;
2187 default:
2188 return GL_INVALID_ENUM;
2189 }
2190
2191 default:
2192 return GL_INVALID_ENUM;
2193 }
2194 return GL_NO_ERROR;
2195 }
2196
2197
2198 /**
2199 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2200 * and glTex[Sub]Image.
2201 * \return error code, or GL_NO_ERROR.
2202 */
2203 GLenum
2204 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2205 GLenum format, GLenum type,
2206 unsigned dimensions)
2207 {
2208 GLboolean type_valid = GL_TRUE;
2209
2210 switch (format) {
2211 case GL_RED:
2212 case GL_RG:
2213 if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_texture_rg)
2214 return GL_INVALID_VALUE;
2215 /* fallthrough */
2216 case GL_ALPHA:
2217 case GL_LUMINANCE:
2218 case GL_LUMINANCE_ALPHA:
2219 type_valid = (type == GL_UNSIGNED_BYTE
2220 || type == GL_FLOAT
2221 || type == GL_HALF_FLOAT_OES);
2222 break;
2223
2224 case GL_RGB:
2225 type_valid = (type == GL_UNSIGNED_BYTE
2226 || type == GL_UNSIGNED_SHORT_5_6_5
2227 || type == GL_FLOAT
2228 || type == GL_HALF_FLOAT_OES);
2229 break;
2230
2231 case GL_RGBA:
2232 type_valid = (type == GL_UNSIGNED_BYTE
2233 || type == GL_UNSIGNED_SHORT_4_4_4_4
2234 || type == GL_UNSIGNED_SHORT_5_5_5_1
2235 || type == GL_FLOAT
2236 || type == GL_HALF_FLOAT_OES
2237 || (ctx->Extensions.EXT_texture_type_2_10_10_10_REV &&
2238 type == GL_UNSIGNED_INT_2_10_10_10_REV));
2239 break;
2240
2241 case GL_DEPTH_COMPONENT:
2242 /* This format is filtered against invalid dimensionalities elsewhere.
2243 */
2244 type_valid = (type == GL_UNSIGNED_SHORT
2245 || type == GL_UNSIGNED_INT);
2246 break;
2247
2248 case GL_DEPTH_STENCIL:
2249 /* This format is filtered against invalid dimensionalities elsewhere.
2250 */
2251 type_valid = (type == GL_UNSIGNED_INT_24_8);
2252 break;
2253
2254 case GL_BGRA_EXT:
2255 type_valid = (type == GL_UNSIGNED_BYTE);
2256
2257 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2258 * the format does not appear to be allowed for 3D textures in OpenGL
2259 * ES.
2260 */
2261 if (dimensions != 2)
2262 return GL_INVALID_VALUE;
2263
2264 break;
2265
2266 default:
2267 return GL_INVALID_VALUE;
2268 }
2269
2270 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2271 }
2272
2273 /**
2274 * Return the simple base format for a given internal texture format.
2275 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2276 *
2277 * \param ctx GL context.
2278 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2279 *
2280 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2281 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2282 *
2283 * This is the format which is used during texture application (i.e. the
2284 * texture format and env mode determine the arithmetic used.
2285 */
2286 GLint
2287 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2288 {
2289 switch (internalFormat) {
2290 case GL_ALPHA:
2291 case GL_ALPHA4:
2292 case GL_ALPHA8:
2293 case GL_ALPHA12:
2294 case GL_ALPHA16:
2295 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2296 case 1:
2297 case GL_LUMINANCE:
2298 case GL_LUMINANCE4:
2299 case GL_LUMINANCE8:
2300 case GL_LUMINANCE12:
2301 case GL_LUMINANCE16:
2302 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2303 case 2:
2304 case GL_LUMINANCE_ALPHA:
2305 case GL_LUMINANCE4_ALPHA4:
2306 case GL_LUMINANCE6_ALPHA2:
2307 case GL_LUMINANCE8_ALPHA8:
2308 case GL_LUMINANCE12_ALPHA4:
2309 case GL_LUMINANCE12_ALPHA12:
2310 case GL_LUMINANCE16_ALPHA16:
2311 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2312 case GL_INTENSITY:
2313 case GL_INTENSITY4:
2314 case GL_INTENSITY8:
2315 case GL_INTENSITY12:
2316 case GL_INTENSITY16:
2317 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2318 case 3:
2319 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2320 case GL_RGB:
2321 case GL_R3_G3_B2:
2322 case GL_RGB4:
2323 case GL_RGB5:
2324 case GL_RGB8:
2325 case GL_RGB10:
2326 case GL_RGB12:
2327 case GL_RGB16:
2328 return GL_RGB;
2329 case 4:
2330 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2331 case GL_RGBA:
2332 case GL_RGBA2:
2333 case GL_RGBA4:
2334 case GL_RGB5_A1:
2335 case GL_RGBA8:
2336 case GL_RGB10_A2:
2337 case GL_RGBA12:
2338 case GL_RGBA16:
2339 return GL_RGBA;
2340 default:
2341 ; /* fallthrough */
2342 }
2343
2344 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2345 */
2346 if (_mesa_is_gles(ctx)) {
2347 switch (internalFormat) {
2348 case GL_BGRA:
2349 return GL_RGBA;
2350 default:
2351 ; /* fallthrough */
2352 }
2353 }
2354
2355 if (ctx->Extensions.ARB_ES2_compatibility) {
2356 switch (internalFormat) {
2357 case GL_RGB565:
2358 return GL_RGB;
2359 default:
2360 ; /* fallthrough */
2361 }
2362 }
2363
2364 if (ctx->Extensions.ARB_depth_texture) {
2365 switch (internalFormat) {
2366 case GL_DEPTH_COMPONENT:
2367 case GL_DEPTH_COMPONENT16:
2368 case GL_DEPTH_COMPONENT24:
2369 case GL_DEPTH_COMPONENT32:
2370 return GL_DEPTH_COMPONENT;
2371 case GL_DEPTH_STENCIL:
2372 case GL_DEPTH24_STENCIL8:
2373 return GL_DEPTH_STENCIL;
2374 default:
2375 ; /* fallthrough */
2376 }
2377 }
2378
2379 if (ctx->Extensions.ARB_texture_stencil8) {
2380 switch (internalFormat) {
2381 case GL_STENCIL_INDEX:
2382 case GL_STENCIL_INDEX1:
2383 case GL_STENCIL_INDEX4:
2384 case GL_STENCIL_INDEX8:
2385 case GL_STENCIL_INDEX16:
2386 return GL_STENCIL_INDEX;
2387 default:
2388 ; /* fallthrough */
2389 }
2390 }
2391
2392 switch (internalFormat) {
2393 case GL_COMPRESSED_ALPHA:
2394 return GL_ALPHA;
2395 case GL_COMPRESSED_LUMINANCE:
2396 return GL_LUMINANCE;
2397 case GL_COMPRESSED_LUMINANCE_ALPHA:
2398 return GL_LUMINANCE_ALPHA;
2399 case GL_COMPRESSED_INTENSITY:
2400 return GL_INTENSITY;
2401 case GL_COMPRESSED_RGB:
2402 return GL_RGB;
2403 case GL_COMPRESSED_RGBA:
2404 return GL_RGBA;
2405 default:
2406 ; /* fallthrough */
2407 }
2408
2409 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2410 GLenum base_compressed =
2411 _mesa_gl_compressed_format_base_format(internalFormat);
2412 if (base_compressed)
2413 return base_compressed;
2414 }
2415
2416 if ((ctx->Extensions.KHR_texture_compression_astc_ldr &&
2417 is_astc_2d_format(internalFormat)) ||
2418 (ctx->Extensions.OES_texture_compression_astc &&
2419 is_astc_3d_format(internalFormat)))
2420 return GL_RGBA;
2421
2422 if (ctx->Extensions.MESA_ycbcr_texture) {
2423 if (internalFormat == GL_YCBCR_MESA)
2424 return GL_YCBCR_MESA;
2425 }
2426
2427 if (ctx->Extensions.ARB_texture_float) {
2428 switch (internalFormat) {
2429 case GL_ALPHA16F_ARB:
2430 case GL_ALPHA32F_ARB:
2431 return GL_ALPHA;
2432 case GL_RGBA16F_ARB:
2433 case GL_RGBA32F_ARB:
2434 return GL_RGBA;
2435 case GL_RGB16F_ARB:
2436 case GL_RGB32F_ARB:
2437 return GL_RGB;
2438 case GL_INTENSITY16F_ARB:
2439 case GL_INTENSITY32F_ARB:
2440 return GL_INTENSITY;
2441 case GL_LUMINANCE16F_ARB:
2442 case GL_LUMINANCE32F_ARB:
2443 return GL_LUMINANCE;
2444 case GL_LUMINANCE_ALPHA16F_ARB:
2445 case GL_LUMINANCE_ALPHA32F_ARB:
2446 return GL_LUMINANCE_ALPHA;
2447 default:
2448 ; /* fallthrough */
2449 }
2450 }
2451
2452 if (ctx->Extensions.EXT_texture_snorm) {
2453 switch (internalFormat) {
2454 case GL_RED_SNORM:
2455 case GL_R8_SNORM:
2456 case GL_R16_SNORM:
2457 return GL_RED;
2458 case GL_RG_SNORM:
2459 case GL_RG8_SNORM:
2460 case GL_RG16_SNORM:
2461 return GL_RG;
2462 case GL_RGB_SNORM:
2463 case GL_RGB8_SNORM:
2464 case GL_RGB16_SNORM:
2465 return GL_RGB;
2466 case GL_RGBA_SNORM:
2467 case GL_RGBA8_SNORM:
2468 case GL_RGBA16_SNORM:
2469 return GL_RGBA;
2470 case GL_ALPHA_SNORM:
2471 case GL_ALPHA8_SNORM:
2472 case GL_ALPHA16_SNORM:
2473 return GL_ALPHA;
2474 case GL_LUMINANCE_SNORM:
2475 case GL_LUMINANCE8_SNORM:
2476 case GL_LUMINANCE16_SNORM:
2477 return GL_LUMINANCE;
2478 case GL_LUMINANCE_ALPHA_SNORM:
2479 case GL_LUMINANCE8_ALPHA8_SNORM:
2480 case GL_LUMINANCE16_ALPHA16_SNORM:
2481 return GL_LUMINANCE_ALPHA;
2482 case GL_INTENSITY_SNORM:
2483 case GL_INTENSITY8_SNORM:
2484 case GL_INTENSITY16_SNORM:
2485 return GL_INTENSITY;
2486 default:
2487 ; /* fallthrough */
2488 }
2489 }
2490
2491 if (ctx->Extensions.EXT_texture_sRGB) {
2492 switch (internalFormat) {
2493 case GL_SRGB_EXT:
2494 case GL_SRGB8_EXT:
2495 case GL_COMPRESSED_SRGB_EXT:
2496 return GL_RGB;
2497 case GL_SRGB_ALPHA_EXT:
2498 case GL_SRGB8_ALPHA8_EXT:
2499 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2500 return GL_RGBA;
2501 case GL_SLUMINANCE_ALPHA_EXT:
2502 case GL_SLUMINANCE8_ALPHA8_EXT:
2503 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2504 return GL_LUMINANCE_ALPHA;
2505 case GL_SLUMINANCE_EXT:
2506 case GL_SLUMINANCE8_EXT:
2507 case GL_COMPRESSED_SLUMINANCE_EXT:
2508 return GL_LUMINANCE;
2509 default:
2510 ; /* fallthrough */
2511 }
2512 }
2513
2514 if (ctx->Version >= 30 ||
2515 ctx->Extensions.EXT_texture_integer) {
2516 switch (internalFormat) {
2517 case GL_RGBA8UI_EXT:
2518 case GL_RGBA16UI_EXT:
2519 case GL_RGBA32UI_EXT:
2520 case GL_RGBA8I_EXT:
2521 case GL_RGBA16I_EXT:
2522 case GL_RGBA32I_EXT:
2523 return GL_RGBA;
2524 case GL_RGB8UI_EXT:
2525 case GL_RGB16UI_EXT:
2526 case GL_RGB32UI_EXT:
2527 case GL_RGB8I_EXT:
2528 case GL_RGB16I_EXT:
2529 case GL_RGB32I_EXT:
2530 return GL_RGB;
2531 }
2532 }
2533
2534 if (ctx->Extensions.ARB_texture_rgb10_a2ui) {
2535 switch (internalFormat) {
2536 case GL_RGB10_A2UI:
2537 return GL_RGBA;
2538 }
2539 }
2540
2541 if (ctx->Extensions.EXT_texture_integer) {
2542 switch (internalFormat) {
2543 case GL_ALPHA8UI_EXT:
2544 case GL_ALPHA16UI_EXT:
2545 case GL_ALPHA32UI_EXT:
2546 case GL_ALPHA8I_EXT:
2547 case GL_ALPHA16I_EXT:
2548 case GL_ALPHA32I_EXT:
2549 return GL_ALPHA;
2550 case GL_INTENSITY8UI_EXT:
2551 case GL_INTENSITY16UI_EXT:
2552 case GL_INTENSITY32UI_EXT:
2553 case GL_INTENSITY8I_EXT:
2554 case GL_INTENSITY16I_EXT:
2555 case GL_INTENSITY32I_EXT:
2556 return GL_INTENSITY;
2557 case GL_LUMINANCE8UI_EXT:
2558 case GL_LUMINANCE16UI_EXT:
2559 case GL_LUMINANCE32UI_EXT:
2560 case GL_LUMINANCE8I_EXT:
2561 case GL_LUMINANCE16I_EXT:
2562 case GL_LUMINANCE32I_EXT:
2563 return GL_LUMINANCE;
2564 case GL_LUMINANCE_ALPHA8UI_EXT:
2565 case GL_LUMINANCE_ALPHA16UI_EXT:
2566 case GL_LUMINANCE_ALPHA32UI_EXT:
2567 case GL_LUMINANCE_ALPHA8I_EXT:
2568 case GL_LUMINANCE_ALPHA16I_EXT:
2569 case GL_LUMINANCE_ALPHA32I_EXT:
2570 return GL_LUMINANCE_ALPHA;
2571 default:
2572 ; /* fallthrough */
2573 }
2574 }
2575
2576 if (ctx->Extensions.ARB_texture_rg) {
2577 switch (internalFormat) {
2578 case GL_R16F:
2579 case GL_R32F:
2580 if (!ctx->Extensions.ARB_texture_float)
2581 break;
2582 return GL_RED;
2583 case GL_R8I:
2584 case GL_R8UI:
2585 case GL_R16I:
2586 case GL_R16UI:
2587 case GL_R32I:
2588 case GL_R32UI:
2589 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2590 break;
2591 /* FALLTHROUGH */
2592 case GL_R8:
2593 case GL_R16:
2594 case GL_RED:
2595 case GL_COMPRESSED_RED:
2596 return GL_RED;
2597
2598 case GL_RG16F:
2599 case GL_RG32F:
2600 if (!ctx->Extensions.ARB_texture_float)
2601 break;
2602 return GL_RG;
2603 case GL_RG8I:
2604 case GL_RG8UI:
2605 case GL_RG16I:
2606 case GL_RG16UI:
2607 case GL_RG32I:
2608 case GL_RG32UI:
2609 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2610 break;
2611 /* FALLTHROUGH */
2612 case GL_RG:
2613 case GL_RG8:
2614 case GL_RG16:
2615 case GL_COMPRESSED_RG:
2616 return GL_RG;
2617 default:
2618 ; /* fallthrough */
2619 }
2620 }
2621
2622 if (ctx->Extensions.EXT_texture_shared_exponent) {
2623 switch (internalFormat) {
2624 case GL_RGB9_E5_EXT:
2625 return GL_RGB;
2626 default:
2627 ; /* fallthrough */
2628 }
2629 }
2630
2631 if (ctx->Extensions.EXT_packed_float) {
2632 switch (internalFormat) {
2633 case GL_R11F_G11F_B10F_EXT:
2634 return GL_RGB;
2635 default:
2636 ; /* fallthrough */
2637 }
2638 }
2639
2640 if (ctx->Extensions.ARB_depth_buffer_float) {
2641 switch (internalFormat) {
2642 case GL_DEPTH_COMPONENT32F:
2643 return GL_DEPTH_COMPONENT;
2644 case GL_DEPTH32F_STENCIL8:
2645 return GL_DEPTH_STENCIL;
2646 default:
2647 ; /* fallthrough */
2648 }
2649 }
2650
2651 return -1; /* error */
2652 }
2653
2654 /**
2655 * Returns the effective internal format from a texture format and type.
2656 * This is used by texture image operations internally for validation, when
2657 * the specified internal format is a base (unsized) format.
2658 *
2659 * This method will only return a valid effective internal format if the
2660 * combination of format, type and internal format in base form, is acceptable.
2661 *
2662 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2663 * in extensions, to unambiguously correspond to the given base format, then
2664 * that internal format is returned as the effective. Otherwise, if the
2665 * combination is accepted but a single effective format is not defined, the
2666 * passed base format will be returned instead.
2667 *
2668 * \param format the texture format
2669 * \param type the texture type
2670 */
2671 static GLenum
2672 _mesa_es3_effective_internal_format_for_format_and_type(GLenum format,
2673 GLenum type)
2674 {
2675 switch (type) {
2676 case GL_UNSIGNED_BYTE:
2677 switch (format) {
2678 case GL_RGBA:
2679 return GL_RGBA8;
2680 case GL_RGB:
2681 return GL_RGB8;
2682 case GL_RG:
2683 return GL_RG8;
2684 case GL_RED:
2685 return GL_R8;
2686 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2687 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2688 * internal formats, they do not correspond to GL constants, so the base
2689 * format is returned instead.
2690 */
2691 case GL_BGRA_EXT:
2692 case GL_LUMINANCE_ALPHA:
2693 case GL_LUMINANCE:
2694 case GL_ALPHA:
2695 return format;
2696 }
2697 break;
2698
2699 case GL_UNSIGNED_SHORT_4_4_4_4:
2700 if (format == GL_RGBA)
2701 return GL_RGBA4;
2702 break;
2703
2704 case GL_UNSIGNED_SHORT_5_5_5_1:
2705 if (format == GL_RGBA)
2706 return GL_RGB5_A1;
2707 break;
2708
2709 case GL_UNSIGNED_SHORT_5_6_5:
2710 if (format == GL_RGB)
2711 return GL_RGB565;
2712 break;
2713
2714 /* OES_packed_depth_stencil */
2715 case GL_UNSIGNED_INT_24_8:
2716 if (format == GL_DEPTH_STENCIL)
2717 return GL_DEPTH24_STENCIL8;
2718 break;
2719
2720 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2721 if (format == GL_DEPTH_STENCIL)
2722 return GL_DEPTH32F_STENCIL8;
2723 break;
2724
2725 case GL_UNSIGNED_SHORT:
2726 if (format == GL_DEPTH_COMPONENT)
2727 return GL_DEPTH_COMPONENT16;
2728 break;
2729
2730 case GL_UNSIGNED_INT:
2731 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2732 * the format.
2733 */
2734 if (format == GL_DEPTH_COMPONENT)
2735 return format;
2736 break;
2737
2738 /* OES_texture_float and OES_texture_half_float */
2739 case GL_FLOAT:
2740 if (format == GL_DEPTH_COMPONENT)
2741 return GL_DEPTH_COMPONENT32F;
2742 /* fall through */
2743 case GL_HALF_FLOAT_OES:
2744 switch (format) {
2745 case GL_RGBA:
2746 case GL_RGB:
2747 case GL_LUMINANCE_ALPHA:
2748 case GL_LUMINANCE:
2749 case GL_ALPHA:
2750 case GL_RED:
2751 case GL_RG:
2752 return format;
2753 }
2754 break;
2755 case GL_HALF_FLOAT:
2756 switch (format) {
2757 case GL_RG:
2758 case GL_RED:
2759 return format;
2760 }
2761 break;
2762
2763 /* GL_EXT_texture_type_2_10_10_10_REV */
2764 case GL_UNSIGNED_INT_2_10_10_10_REV:
2765 switch (format) {
2766 case GL_RGBA:
2767 case GL_RGB:
2768 return format;
2769 }
2770 break;
2771
2772 default:
2773 /* fall through and return NONE */
2774 break;
2775 }
2776
2777 return GL_NONE;
2778 }
2779
2780 /**
2781 * Do error checking of format/type combinations for OpenGL ES 3
2782 * glTex[Sub]Image, or ES1/ES2 with GL_OES_required_internalformat.
2783 * \return error code, or GL_NO_ERROR.
2784 */
2785 GLenum
2786 _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
2787 GLenum format, GLenum type,
2788 GLenum internalFormat)
2789 {
2790 /* If internalFormat is an unsized format, then the effective internal
2791 * format derived from format and type should be used instead. Page 127,
2792 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2793 *
2794 * "if internalformat is a base internal format, the effective
2795 * internal format is a sized internal format that is derived
2796 * from the format and type for internal use by the GL.
2797 * Table 3.12 specifies the mapping of format and type to effective
2798 * internal formats. The effective internal format is used by the GL
2799 * for purposes such as texture completeness or type checks for
2800 * CopyTex* commands. In these cases, the GL is required to operate
2801 * as if the effective internal format was used as the internalformat
2802 * when specifying the texture data."
2803 */
2804 if (_mesa_is_enum_format_unsized(internalFormat)) {
2805 GLenum effectiveInternalFormat =
2806 _mesa_es3_effective_internal_format_for_format_and_type(format, type);
2807
2808 if (effectiveInternalFormat == GL_NONE)
2809 return GL_INVALID_OPERATION;
2810
2811 GLenum baseInternalFormat;
2812 if (internalFormat == GL_BGRA_EXT) {
2813 /* Unfortunately, _mesa_base_tex_format returns a base format of
2814 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2815 * asking the question, "what channels does this format have?"
2816 * However, if we're trying to determine if two internal formats
2817 * match in the ES3 sense, we actually want GL_BGRA.
2818 */
2819 baseInternalFormat = GL_BGRA_EXT;
2820 } else {
2821 baseInternalFormat =
2822 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2823 }
2824
2825 if (internalFormat != baseInternalFormat)
2826 return GL_INVALID_OPERATION;
2827
2828 internalFormat = effectiveInternalFormat;
2829 }
2830
2831 switch (format) {
2832 case GL_BGRA_EXT:
2833 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2834 return GL_INVALID_OPERATION;
2835 break;
2836
2837 case GL_RGBA:
2838 switch (type) {
2839 case GL_UNSIGNED_BYTE:
2840 switch (internalFormat) {
2841 case GL_RGBA:
2842 case GL_RGBA8:
2843 case GL_RGB5_A1:
2844 case GL_RGBA4:
2845 break;
2846 case GL_SRGB8_ALPHA8_EXT:
2847 if (ctx->Version <= 20)
2848 return GL_INVALID_OPERATION;
2849 break;
2850 default:
2851 return GL_INVALID_OPERATION;
2852 }
2853 break;
2854
2855 case GL_BYTE:
2856 if (ctx->Version <= 20 || internalFormat != GL_RGBA8_SNORM)
2857 return GL_INVALID_OPERATION;
2858 break;
2859
2860 case GL_UNSIGNED_SHORT:
2861 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGBA16)
2862 return GL_INVALID_OPERATION;
2863 break;
2864
2865 case GL_SHORT:
2866 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2867 internalFormat != GL_RGBA16_SNORM)
2868 return GL_INVALID_OPERATION;
2869 break;
2870
2871 case GL_UNSIGNED_SHORT_4_4_4_4:
2872 switch (internalFormat) {
2873 case GL_RGBA:
2874 case GL_RGBA4:
2875 break;
2876 default:
2877 return GL_INVALID_OPERATION;
2878 }
2879 break;
2880
2881 case GL_UNSIGNED_SHORT_5_5_5_1:
2882 switch (internalFormat) {
2883 case GL_RGBA:
2884 case GL_RGB5_A1:
2885 break;
2886 default:
2887 return GL_INVALID_OPERATION;
2888 }
2889 break;
2890
2891 case GL_UNSIGNED_INT_2_10_10_10_REV:
2892 switch (internalFormat) {
2893 case GL_RGBA:
2894 case GL_RGB10_A2:
2895 case GL_RGB5_A1:
2896 if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
2897 return GL_INVALID_OPERATION;
2898 break;
2899 default:
2900 return GL_INVALID_OPERATION;
2901 }
2902 break;
2903
2904 case GL_HALF_FLOAT:
2905 if (ctx->Version <= 20 || internalFormat != GL_RGBA16F)
2906 return GL_INVALID_OPERATION;
2907 break;
2908
2909 case GL_FLOAT:
2910 switch (internalFormat) {
2911 case GL_RGBA16F:
2912 case GL_RGBA32F:
2913 if (ctx->Version <= 20)
2914 return GL_INVALID_OPERATION;
2915 break;
2916 case GL_RGBA:
2917 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2918 break;
2919 default:
2920 return GL_INVALID_OPERATION;
2921 }
2922 break;
2923
2924 case GL_HALF_FLOAT_OES:
2925 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2926 break;
2927 default:
2928 return GL_INVALID_OPERATION;
2929 }
2930 break;
2931
2932 case GL_RGBA_INTEGER:
2933 if (ctx->Version <= 20)
2934 return GL_INVALID_OPERATION;
2935 switch (type) {
2936 case GL_UNSIGNED_BYTE:
2937 if (internalFormat != GL_RGBA8UI)
2938 return GL_INVALID_OPERATION;
2939 break;
2940
2941 case GL_BYTE:
2942 if (internalFormat != GL_RGBA8I)
2943 return GL_INVALID_OPERATION;
2944 break;
2945
2946 case GL_UNSIGNED_SHORT:
2947 if (internalFormat != GL_RGBA16UI)
2948 return GL_INVALID_OPERATION;
2949 break;
2950
2951 case GL_SHORT:
2952 if (internalFormat != GL_RGBA16I)
2953 return GL_INVALID_OPERATION;
2954 break;
2955
2956 case GL_UNSIGNED_INT:
2957 if (internalFormat != GL_RGBA32UI)
2958 return GL_INVALID_OPERATION;
2959 break;
2960
2961 case GL_INT:
2962 if (internalFormat != GL_RGBA32I)
2963 return GL_INVALID_OPERATION;
2964 break;
2965
2966 case GL_UNSIGNED_INT_2_10_10_10_REV:
2967 if (internalFormat != GL_RGB10_A2UI)
2968 return GL_INVALID_OPERATION;
2969 break;
2970
2971 default:
2972 return GL_INVALID_OPERATION;
2973 }
2974 break;
2975
2976 case GL_RGB:
2977 switch (type) {
2978 case GL_UNSIGNED_BYTE:
2979 switch (internalFormat) {
2980 case GL_RGB:
2981 case GL_RGB8:
2982 case GL_RGB565:
2983 break;
2984 case GL_SRGB8:
2985 if (ctx->Version <= 20)
2986 return GL_INVALID_OPERATION;
2987 break;
2988 default:
2989 return GL_INVALID_OPERATION;
2990 }
2991 break;
2992
2993 case GL_BYTE:
2994 if (ctx->Version <= 20 || internalFormat != GL_RGB8_SNORM)
2995 return GL_INVALID_OPERATION;
2996 break;
2997
2998 case GL_UNSIGNED_SHORT:
2999 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGB16)
3000 return GL_INVALID_OPERATION;
3001 break;
3002
3003 case GL_SHORT:
3004 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3005 internalFormat != GL_RGB16_SNORM)
3006 return GL_INVALID_OPERATION;
3007 break;
3008
3009 case GL_UNSIGNED_SHORT_5_6_5:
3010 switch (internalFormat) {
3011 case GL_RGB:
3012 case GL_RGB565:
3013 break;
3014 default:
3015 return GL_INVALID_OPERATION;
3016 }
3017 break;
3018
3019 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3020 if (ctx->Version <= 20 || internalFormat != GL_R11F_G11F_B10F)
3021 return GL_INVALID_OPERATION;
3022 break;
3023
3024 case GL_UNSIGNED_INT_5_9_9_9_REV:
3025 if (ctx->Version <= 20 || internalFormat != GL_RGB9_E5)
3026 return GL_INVALID_OPERATION;
3027 break;
3028
3029 case GL_HALF_FLOAT:
3030 if (ctx->Version <= 20)
3031 return GL_INVALID_OPERATION;
3032 switch (internalFormat) {
3033 case GL_RGB16F:
3034 case GL_R11F_G11F_B10F:
3035 case GL_RGB9_E5:
3036 break;
3037 default:
3038 return GL_INVALID_OPERATION;
3039 }
3040 break;
3041
3042 case GL_FLOAT:
3043 switch (internalFormat) {
3044 case GL_RGB16F:
3045 case GL_RGB32F:
3046 case GL_R11F_G11F_B10F:
3047 case GL_RGB9_E5:
3048 if (ctx->Version <= 20)
3049 return GL_INVALID_OPERATION;
3050 break;
3051 case GL_RGB:
3052 if (ctx->Extensions.OES_texture_float && internalFormat == format)
3053 break;
3054 default:
3055 return GL_INVALID_OPERATION;
3056 }
3057 break;
3058
3059 case GL_HALF_FLOAT_OES:
3060 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3061 return GL_INVALID_OPERATION;
3062 break;
3063
3064 case GL_UNSIGNED_INT_2_10_10_10_REV:
3065 switch (internalFormat) {
3066 case GL_RGB:
3067 case GL_RGB10:
3068 case GL_RGB8:
3069 case GL_RGB565:
3070 /* GL_EXT_texture_type_2_10_10_10_REV allows GL_RGB even though
3071 * GLES3 doesn't, and GL_OES_required_internalformat extends that
3072 * to allow the sized RGB internalformats as well.
3073 */
3074 if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
3075 return GL_INVALID_OPERATION;
3076 break;
3077 default:
3078 return GL_INVALID_OPERATION;
3079 }
3080 break;
3081
3082 default:
3083 return GL_INVALID_OPERATION;
3084 }
3085 break;
3086
3087 case GL_RGB_INTEGER:
3088 if (ctx->Version <= 20)
3089 return GL_INVALID_OPERATION;
3090 switch (type) {
3091 case GL_UNSIGNED_BYTE:
3092 if (internalFormat != GL_RGB8UI)
3093 return GL_INVALID_OPERATION;
3094 break;
3095
3096 case GL_BYTE:
3097 if (internalFormat != GL_RGB8I)
3098 return GL_INVALID_OPERATION;
3099 break;
3100
3101 case GL_UNSIGNED_SHORT:
3102 if (internalFormat != GL_RGB16UI)
3103 return GL_INVALID_OPERATION;
3104 break;
3105
3106 case GL_SHORT:
3107 if (internalFormat != GL_RGB16I)
3108 return GL_INVALID_OPERATION;
3109 break;
3110
3111 case GL_UNSIGNED_INT:
3112 if (internalFormat != GL_RGB32UI)
3113 return GL_INVALID_OPERATION;
3114 break;
3115
3116 case GL_INT:
3117 if (internalFormat != GL_RGB32I)
3118 return GL_INVALID_OPERATION;
3119 break;
3120
3121 default:
3122 return GL_INVALID_OPERATION;
3123 }
3124 break;
3125
3126 case GL_RG:
3127 if (!ctx->Extensions.ARB_texture_rg)
3128 return GL_INVALID_OPERATION;
3129 switch (type) {
3130 case GL_UNSIGNED_BYTE:
3131 if (internalFormat != GL_RG8)
3132 return GL_INVALID_OPERATION;
3133 break;
3134
3135 case GL_BYTE:
3136 if (internalFormat != GL_RG8_SNORM)
3137 return GL_INVALID_OPERATION;
3138 break;
3139
3140 case GL_UNSIGNED_SHORT:
3141 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RG16)
3142 return GL_INVALID_OPERATION;
3143 break;
3144
3145 case GL_SHORT:
3146 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3147 internalFormat != GL_RG16_SNORM)
3148 return GL_INVALID_OPERATION;
3149 break;
3150
3151 case GL_HALF_FLOAT:
3152 case GL_HALF_FLOAT_OES:
3153 switch (internalFormat) {
3154 case GL_RG16F:
3155 if (ctx->Version <= 20)
3156 return GL_INVALID_OPERATION;
3157 break;
3158 case GL_RG:
3159 if (ctx->Extensions.ARB_texture_rg &&
3160 ctx->Extensions.OES_texture_half_float)
3161 break;
3162 /* fallthrough */
3163 default:
3164 return GL_INVALID_OPERATION;
3165 }
3166 break;
3167
3168 case GL_FLOAT:
3169 switch (internalFormat) {
3170 case GL_RG16F:
3171 case GL_RG32F:
3172 break;
3173 case GL_RG:
3174 if (ctx->Extensions.ARB_texture_rg &&
3175 ctx->Extensions.OES_texture_float)
3176 break;
3177 /* fallthrough */
3178 default:
3179 return GL_INVALID_OPERATION;
3180 }
3181 break;
3182
3183 default:
3184 return GL_INVALID_OPERATION;
3185 }
3186 break;
3187
3188 case GL_RG_INTEGER:
3189 if (ctx->Version <= 20)
3190 return GL_INVALID_OPERATION;
3191 switch (type) {
3192 case GL_UNSIGNED_BYTE:
3193 if (internalFormat != GL_RG8UI)
3194 return GL_INVALID_OPERATION;
3195 break;
3196
3197 case GL_BYTE:
3198 if (internalFormat != GL_RG8I)
3199 return GL_INVALID_OPERATION;
3200 break;
3201
3202 case GL_UNSIGNED_SHORT:
3203 if (internalFormat != GL_RG16UI)
3204 return GL_INVALID_OPERATION;
3205 break;
3206
3207 case GL_SHORT:
3208 if (internalFormat != GL_RG16I)
3209 return GL_INVALID_OPERATION;
3210 break;
3211
3212 case GL_UNSIGNED_INT:
3213 if (internalFormat != GL_RG32UI)
3214 return GL_INVALID_OPERATION;
3215 break;
3216
3217 case GL_INT:
3218 if (internalFormat != GL_RG32I)
3219 return GL_INVALID_OPERATION;
3220 break;
3221
3222 default:
3223 return GL_INVALID_OPERATION;
3224 }
3225 break;
3226
3227 case GL_RED:
3228 if (!ctx->Extensions.ARB_texture_rg)
3229 return GL_INVALID_OPERATION;
3230 switch (type) {
3231 case GL_UNSIGNED_BYTE:
3232 if (internalFormat != GL_R8)
3233 return GL_INVALID_OPERATION;
3234 break;
3235
3236 case GL_BYTE:
3237 if (internalFormat != GL_R8_SNORM)
3238 return GL_INVALID_OPERATION;
3239 break;
3240
3241 case GL_UNSIGNED_SHORT:
3242 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_R16)
3243 return GL_INVALID_OPERATION;
3244 break;
3245
3246 case GL_SHORT:
3247 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3248 internalFormat != GL_R16_SNORM)
3249 return GL_INVALID_OPERATION;
3250 break;
3251
3252 case GL_HALF_FLOAT:
3253 case GL_HALF_FLOAT_OES:
3254 switch (internalFormat) {
3255 case GL_R16F:
3256 if (ctx->Version <= 20)
3257 return GL_INVALID_OPERATION;
3258 break;
3259 case GL_RG:
3260 case GL_RED:
3261 if (ctx->Extensions.ARB_texture_rg &&
3262 ctx->Extensions.OES_texture_half_float)
3263 break;
3264 /* fallthrough */
3265 default:
3266 return GL_INVALID_OPERATION;
3267 }
3268 break;
3269
3270 case GL_FLOAT:
3271 switch (internalFormat) {
3272 case GL_R16F:
3273 case GL_R32F:
3274 break;
3275 case GL_RED:
3276 if (ctx->Extensions.ARB_texture_rg &&
3277 ctx->Extensions.OES_texture_float)
3278 break;
3279 /* fallthrough */
3280 default:
3281 return GL_INVALID_OPERATION;
3282 }
3283 break;
3284
3285 default:
3286 return GL_INVALID_OPERATION;
3287 }
3288 break;
3289
3290 case GL_RED_INTEGER:
3291 if (ctx->Version <= 20)
3292 return GL_INVALID_OPERATION;
3293 switch (type) {
3294 case GL_UNSIGNED_BYTE:
3295 if (internalFormat != GL_R8UI)
3296 return GL_INVALID_OPERATION;
3297 break;
3298
3299 case GL_BYTE:
3300 if (internalFormat != GL_R8I)
3301 return GL_INVALID_OPERATION;
3302 break;
3303
3304 case GL_UNSIGNED_SHORT:
3305 if (internalFormat != GL_R16UI)
3306 return GL_INVALID_OPERATION;
3307 break;
3308
3309 case GL_SHORT:
3310 if (internalFormat != GL_R16I)
3311 return GL_INVALID_OPERATION;
3312 break;
3313
3314 case GL_UNSIGNED_INT:
3315 if (internalFormat != GL_R32UI)
3316 return GL_INVALID_OPERATION;
3317 break;
3318
3319 case GL_INT:
3320 if (internalFormat != GL_R32I)
3321 return GL_INVALID_OPERATION;
3322 break;
3323
3324 default:
3325 return GL_INVALID_OPERATION;
3326 }
3327 break;
3328
3329 case GL_DEPTH_COMPONENT:
3330 switch (type) {
3331 case GL_UNSIGNED_SHORT:
3332 if (internalFormat != GL_DEPTH_COMPONENT
3333 && internalFormat != GL_DEPTH_COMPONENT16)
3334 return GL_INVALID_OPERATION;
3335 break;
3336
3337 case GL_UNSIGNED_INT:
3338 switch (internalFormat) {
3339 case GL_DEPTH_COMPONENT:
3340 case GL_DEPTH_COMPONENT16:
3341 case GL_DEPTH_COMPONENT24:
3342 break;
3343 default:
3344 return GL_INVALID_OPERATION;
3345 }
3346 break;
3347
3348 case GL_FLOAT:
3349 if (ctx->Version <= 20 || internalFormat != GL_DEPTH_COMPONENT32F)
3350 return GL_INVALID_OPERATION;
3351 break;
3352
3353 default:
3354 return GL_INVALID_OPERATION;
3355 }
3356 break;
3357
3358 case GL_DEPTH_STENCIL:
3359 switch (type) {
3360 case GL_UNSIGNED_INT_24_8:
3361 if (internalFormat != GL_DEPTH_STENCIL
3362 && internalFormat != GL_DEPTH24_STENCIL8)
3363 return GL_INVALID_OPERATION;
3364 break;
3365
3366 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3367 if (ctx->Version <= 20 || internalFormat != GL_DEPTH32F_STENCIL8)
3368 return GL_INVALID_OPERATION;
3369 break;
3370
3371 default:
3372 return GL_INVALID_OPERATION;
3373 }
3374 break;
3375
3376 case GL_STENCIL_INDEX:
3377 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3378 type != GL_UNSIGNED_BYTE ||
3379 internalFormat != GL_STENCIL_INDEX8) {
3380 return GL_INVALID_OPERATION;
3381 }
3382 break;
3383
3384 case GL_ALPHA:
3385 case GL_LUMINANCE:
3386 case GL_LUMINANCE_ALPHA:
3387 switch (type) {
3388 case GL_FLOAT:
3389 if (!ctx->Extensions.OES_texture_float || internalFormat != format)
3390 return GL_INVALID_OPERATION;
3391 break;
3392 case GL_HALF_FLOAT_OES:
3393 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3394 return GL_INVALID_OPERATION;
3395 break;
3396 case GL_UNSIGNED_BYTE:
3397 if (!(format == internalFormat ||
3398 (format == GL_ALPHA && internalFormat == GL_ALPHA8) ||
3399 (format == GL_LUMINANCE && internalFormat == GL_LUMINANCE8) ||
3400 (format == GL_LUMINANCE_ALPHA &&
3401 ((internalFormat == GL_LUMINANCE8_ALPHA8) ||
3402 (internalFormat == GL_LUMINANCE4_ALPHA4))))) {
3403 return GL_INVALID_OPERATION;
3404 }
3405 break;
3406 default:
3407 return GL_INVALID_OPERATION;
3408 }
3409 break;
3410 }
3411
3412 return GL_NO_ERROR;
3413 }
3414
3415 static void
3416 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3417 {
3418 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3419 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3420 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3421 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3422 }
3423
3424 static bool
3425 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3426 {
3427 switch (format) {
3428 case GL_RGBA:
3429 case GL_RGBA_INTEGER_EXT:
3430 set_swizzle(swizzle, 0, 1, 2, 3);
3431 return true;
3432 case GL_BGRA:
3433 case GL_BGRA_INTEGER_EXT:
3434 set_swizzle(swizzle, 2, 1, 0, 3);
3435 return true;
3436 case GL_ABGR_EXT:
3437 set_swizzle(swizzle, 3, 2, 1, 0);
3438 return true;
3439 case GL_RGB:
3440 case GL_RGB_INTEGER_EXT:
3441 set_swizzle(swizzle, 0, 1, 2, 5);
3442 return true;
3443 case GL_BGR:
3444 case GL_BGR_INTEGER_EXT:
3445 set_swizzle(swizzle, 2, 1, 0, 5);
3446 return true;
3447 case GL_LUMINANCE_ALPHA:
3448 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3449 set_swizzle(swizzle, 0, 0, 0, 1);
3450 return true;
3451 case GL_RG:
3452 case GL_RG_INTEGER:
3453 set_swizzle(swizzle, 0, 1, 4, 5);
3454 return true;
3455 case GL_RED:
3456 case GL_RED_INTEGER_EXT:
3457 set_swizzle(swizzle, 0, 4, 4, 5);
3458 return true;
3459 case GL_GREEN:
3460 case GL_GREEN_INTEGER_EXT:
3461 set_swizzle(swizzle, 4, 0, 4, 5);
3462 return true;
3463 case GL_BLUE:
3464 case GL_BLUE_INTEGER_EXT:
3465 set_swizzle(swizzle, 4, 4, 0, 5);
3466 return true;
3467 case GL_ALPHA:
3468 case GL_ALPHA_INTEGER_EXT:
3469 set_swizzle(swizzle, 4, 4, 4, 0);
3470 return true;
3471 case GL_LUMINANCE:
3472 case GL_LUMINANCE_INTEGER_EXT:
3473 set_swizzle(swizzle, 0, 0, 0, 5);
3474 return true;
3475 case GL_INTENSITY:
3476 set_swizzle(swizzle, 0, 0, 0, 0);
3477 return true;
3478 default:
3479 return false;
3480 }
3481 }
3482
3483 /**
3484 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3485 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3486 * otherwise (for non-array formats).
3487 *
3488 * This function will typically be used to compute a mesa format from a GL type
3489 * so we can then call _mesa_format_convert. This function does
3490 * not consider byte swapping, so it returns types assuming that no byte
3491 * swapping is involved. If byte swapping is involved then clients are supposed
3492 * to handle that on their side before calling _mesa_format_convert.
3493 *
3494 * This function returns an uint32_t that can pack a mesa_format or a
3495 * mesa_array_format. Clients must check the mesa array format bit
3496 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3497 * format is a mesa_array_format or a mesa_format.
3498 */
3499 uint32_t
3500 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3501 {
3502 bool is_array_format = true;
3503 uint8_t swizzle[4];
3504 bool normalized = false, is_float = false, is_signed = false;
3505 int num_channels = 0, type_size = 0;
3506
3507 /* Extract array format type information from the OpenGL data type */
3508 switch (type) {
3509 case GL_UNSIGNED_BYTE:
3510 type_size = 1;
3511 break;
3512 case GL_BYTE:
3513 type_size = 1;
3514 is_signed = true;
3515 break;
3516 case GL_UNSIGNED_SHORT:
3517 type_size = 2;
3518 break;
3519 case GL_SHORT:
3520 type_size = 2;
3521 is_signed = true;
3522 break;
3523 case GL_UNSIGNED_INT:
3524 type_size = 4;
3525 break;
3526 case GL_INT:
3527 type_size = 4;
3528 is_signed = true;
3529 break;
3530 case GL_HALF_FLOAT:
3531 case GL_HALF_FLOAT_OES:
3532 type_size = 2;
3533 is_signed = true;
3534 is_float = true;
3535 break;
3536 case GL_FLOAT:
3537 type_size = 4;
3538 is_signed = true;
3539 is_float = true;
3540 break;
3541 default:
3542 is_array_format = false;
3543 break;
3544 }
3545
3546 /* Extract array format swizzle information from the OpenGL format */
3547 if (is_array_format)
3548 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3549
3550 /* If this is an array format type after checking data type and format,
3551 * create the array format
3552 */
3553 if (is_array_format) {
3554 normalized = !_mesa_is_enum_format_integer(format);
3555 num_channels = _mesa_components_in_format(format);
3556
3557 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
3558 normalized, num_channels,
3559 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3560 }
3561
3562 /* Otherwise this is not an array format, so return the mesa_format
3563 * matching the OpenGL format and data type
3564 */
3565 switch (type) {
3566 case GL_UNSIGNED_SHORT_5_6_5:
3567 if (format == GL_RGB)
3568 return MESA_FORMAT_B5G6R5_UNORM;
3569 else if (format == GL_BGR)
3570 return MESA_FORMAT_R5G6B5_UNORM;
3571 else if (format == GL_RGB_INTEGER)
3572 return MESA_FORMAT_B5G6R5_UINT;
3573 break;
3574 case GL_UNSIGNED_SHORT_5_6_5_REV:
3575 if (format == GL_RGB)
3576 return MESA_FORMAT_R5G6B5_UNORM;
3577 else if (format == GL_BGR)
3578 return MESA_FORMAT_B5G6R5_UNORM;
3579 else if (format == GL_RGB_INTEGER)
3580 return MESA_FORMAT_R5G6B5_UINT;
3581 break;
3582 case GL_UNSIGNED_SHORT_4_4_4_4:
3583 if (format == GL_RGBA)
3584 return MESA_FORMAT_A4B4G4R4_UNORM;
3585 else if (format == GL_BGRA)
3586 return MESA_FORMAT_A4R4G4B4_UNORM;
3587 else if (format == GL_ABGR_EXT)
3588 return MESA_FORMAT_R4G4B4A4_UNORM;
3589 else if (format == GL_RGBA_INTEGER)
3590 return MESA_FORMAT_A4B4G4R4_UINT;
3591 else if (format == GL_BGRA_INTEGER)
3592 return MESA_FORMAT_A4R4G4B4_UINT;
3593 break;
3594 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3595 if (format == GL_RGBA)
3596 return MESA_FORMAT_R4G4B4A4_UNORM;
3597 else if (format == GL_BGRA)
3598 return MESA_FORMAT_B4G4R4A4_UNORM;
3599 else if (format == GL_ABGR_EXT)
3600 return MESA_FORMAT_A4B4G4R4_UNORM;
3601 else if (format == GL_RGBA_INTEGER)
3602 return MESA_FORMAT_R4G4B4A4_UINT;
3603 else if (format == GL_BGRA_INTEGER)
3604 return MESA_FORMAT_B4G4R4A4_UINT;
3605 break;
3606 case GL_UNSIGNED_SHORT_5_5_5_1:
3607 if (format == GL_RGBA)
3608 return MESA_FORMAT_A1B5G5R5_UNORM;
3609 else if (format == GL_BGRA)
3610 return MESA_FORMAT_A1R5G5B5_UNORM;
3611 else if (format == GL_RGBA_INTEGER)
3612 return MESA_FORMAT_A1B5G5R5_UINT;
3613 else if (format == GL_BGRA_INTEGER)
3614 return MESA_FORMAT_A1R5G5B5_UINT;
3615 break;
3616 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3617 if (format == GL_RGBA)
3618 return MESA_FORMAT_R5G5B5A1_UNORM;
3619 else if (format == GL_BGRA)
3620 return MESA_FORMAT_B5G5R5A1_UNORM;
3621 else if (format == GL_RGBA_INTEGER)
3622 return MESA_FORMAT_R5G5B5A1_UINT;
3623 else if (format == GL_BGRA_INTEGER)
3624 return MESA_FORMAT_B5G5R5A1_UINT;
3625 break;
3626 case GL_UNSIGNED_BYTE_3_3_2:
3627 if (format == GL_RGB)
3628 return MESA_FORMAT_B2G3R3_UNORM;
3629 else if (format == GL_RGB_INTEGER)
3630 return MESA_FORMAT_B2G3R3_UINT;
3631 break;
3632 case GL_UNSIGNED_BYTE_2_3_3_REV:
3633 if (format == GL_RGB)
3634 return MESA_FORMAT_R3G3B2_UNORM;
3635 else if (format == GL_RGB_INTEGER)
3636 return MESA_FORMAT_R3G3B2_UINT;
3637 break;
3638 case GL_UNSIGNED_INT_5_9_9_9_REV:
3639 if (format == GL_RGB)
3640 return MESA_FORMAT_R9G9B9E5_FLOAT;
3641 break;
3642 case GL_UNSIGNED_INT_10_10_10_2:
3643 if (format == GL_RGBA)
3644 return MESA_FORMAT_A2B10G10R10_UNORM;
3645 else if (format == GL_RGBA_INTEGER)
3646 return MESA_FORMAT_A2B10G10R10_UINT;
3647 else if (format == GL_BGRA)
3648 return MESA_FORMAT_A2R10G10B10_UNORM;
3649 else if (format == GL_BGRA_INTEGER)
3650 return MESA_FORMAT_A2R10G10B10_UINT;
3651 break;
3652 case GL_UNSIGNED_INT_2_10_10_10_REV:
3653 if (format == GL_RGB)
3654 return MESA_FORMAT_R10G10B10X2_UNORM;
3655 if (format == GL_RGBA)
3656 return MESA_FORMAT_R10G10B10A2_UNORM;
3657 else if (format == GL_RGBA_INTEGER)
3658 return MESA_FORMAT_R10G10B10A2_UINT;
3659 else if (format == GL_BGRA)
3660 return MESA_FORMAT_B10G10R10A2_UNORM;
3661 else if (format == GL_BGRA_INTEGER)
3662 return MESA_FORMAT_B10G10R10A2_UINT;
3663 break;
3664 case GL_UNSIGNED_INT_8_8_8_8:
3665 if (format == GL_RGBA)
3666 return MESA_FORMAT_A8B8G8R8_UNORM;
3667 else if (format == GL_BGRA)
3668 return MESA_FORMAT_A8R8G8B8_UNORM;
3669 else if (format == GL_ABGR_EXT)
3670 return MESA_FORMAT_R8G8B8A8_UNORM;
3671 else if (format == GL_RGBA_INTEGER)
3672 return MESA_FORMAT_A8B8G8R8_UINT;
3673 else if (format == GL_BGRA_INTEGER)
3674 return MESA_FORMAT_A8R8G8B8_UINT;
3675 break;
3676 case GL_UNSIGNED_INT_8_8_8_8_REV:
3677 if (format == GL_RGBA)
3678 return MESA_FORMAT_R8G8B8A8_UNORM;
3679 else if (format == GL_BGRA)
3680 return MESA_FORMAT_B8G8R8A8_UNORM;
3681 else if (format == GL_ABGR_EXT)
3682 return MESA_FORMAT_A8B8G8R8_UNORM;
3683 else if (format == GL_RGBA_INTEGER)
3684 return MESA_FORMAT_R8G8B8A8_UINT;
3685 else if (format == GL_BGRA_INTEGER)
3686 return MESA_FORMAT_B8G8R8A8_UINT;
3687 break;
3688 case GL_UNSIGNED_SHORT_8_8_MESA:
3689 if (format == GL_YCBCR_MESA)
3690 return MESA_FORMAT_YCBCR;
3691 break;
3692 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3693 if (format == GL_YCBCR_MESA)
3694 return MESA_FORMAT_YCBCR_REV;
3695 break;
3696 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3697 if (format == GL_RGB)
3698 return MESA_FORMAT_R11G11B10_FLOAT;
3699 break;
3700 case GL_FLOAT:
3701 if (format == GL_DEPTH_COMPONENT)
3702 return MESA_FORMAT_Z_FLOAT32;
3703 break;
3704 case GL_UNSIGNED_INT:
3705 if (format == GL_DEPTH_COMPONENT)
3706 return MESA_FORMAT_Z_UNORM32;
3707 break;
3708 case GL_UNSIGNED_SHORT:
3709 if (format == GL_DEPTH_COMPONENT)
3710 return MESA_FORMAT_Z_UNORM16;
3711 break;
3712 case GL_UNSIGNED_INT_24_8:
3713 if (format == GL_DEPTH_STENCIL)
3714 return MESA_FORMAT_Z24_UNORM_S8_UINT;
3715 break;
3716 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3717 if (format == GL_DEPTH_STENCIL)
3718 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3719 break;
3720 default:
3721 break;
3722 }
3723
3724 /* If we got here it means that we could not find a Mesa format that
3725 * matches the GL format/type provided. We may need to add a new Mesa
3726 * format in that case.
3727 */
3728 unreachable("Unsupported format");
3729 }
3730
3731 uint32_t
3732 _mesa_tex_format_from_format_and_type(const struct gl_context *ctx,
3733 GLenum gl_format, GLenum type)
3734 {
3735 mesa_format format = _mesa_format_from_format_and_type(gl_format, type);
3736
3737 if (_mesa_format_is_mesa_array_format(format))
3738 format = _mesa_format_from_array_format(format);
3739
3740 if (format == MESA_FORMAT_NONE || !ctx->TextureFormatSupported[format])
3741 return MESA_FORMAT_NONE;
3742
3743 return format;
3744 }
3745
3746 /**
3747 * Returns true if \p internal_format is a sized internal format that
3748 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
3749 */
3750 bool
3751 _mesa_is_es3_color_renderable(const struct gl_context *ctx,
3752 GLenum internal_format)
3753 {
3754 switch (internal_format) {
3755 case GL_R8:
3756 case GL_RG8:
3757 case GL_RGB8:
3758 case GL_RGB565:
3759 case GL_RGBA4:
3760 case GL_RGB5_A1:
3761 case GL_RGBA8:
3762 case GL_RGB10_A2:
3763 case GL_RGB10_A2UI:
3764 case GL_SRGB8_ALPHA8:
3765 case GL_R16F:
3766 case GL_RG16F:
3767 case GL_RGBA16F:
3768 case GL_R32F:
3769 case GL_RG32F:
3770 case GL_RGBA32F:
3771 case GL_R11F_G11F_B10F:
3772 case GL_R8I:
3773 case GL_R8UI:
3774 case GL_R16I:
3775 case GL_R16UI:
3776 case GL_R32I:
3777 case GL_R32UI:
3778 case GL_RG8I:
3779 case GL_RG8UI:
3780 case GL_RG16I:
3781 case GL_RG16UI:
3782 case GL_RG32I:
3783 case GL_RG32UI:
3784 case GL_RGBA8I:
3785 case GL_RGBA8UI:
3786 case GL_RGBA16I:
3787 case GL_RGBA16UI:
3788 case GL_RGBA32I:
3789 case GL_RGBA32UI:
3790 return true;
3791 case GL_R16:
3792 case GL_RG16:
3793 case GL_RGBA16:
3794 return _mesa_has_EXT_texture_norm16(ctx);
3795 default:
3796 return false;
3797 }
3798 }
3799
3800 /**
3801 * Returns true if \p internal_format is a sized internal format that
3802 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
3803 */
3804 bool
3805 _mesa_is_es3_texture_filterable(const struct gl_context *ctx,
3806 GLenum internal_format)
3807 {
3808 switch (internal_format) {
3809 case GL_R8:
3810 case GL_R8_SNORM:
3811 case GL_RG8:
3812 case GL_RG8_SNORM:
3813 case GL_RGB8:
3814 case GL_RGB8_SNORM:
3815 case GL_RGB565:
3816 case GL_RGBA4:
3817 case GL_RGB5_A1:
3818 case GL_RGBA8:
3819 case GL_RGBA8_SNORM:
3820 case GL_RGB10_A2:
3821 case GL_SRGB8:
3822 case GL_SRGB8_ALPHA8:
3823 case GL_R16F:
3824 case GL_RG16F:
3825 case GL_RGB16F:
3826 case GL_RGBA16F:
3827 case GL_R11F_G11F_B10F:
3828 case GL_RGB9_E5:
3829 return true;
3830 case GL_R16:
3831 case GL_R16_SNORM:
3832 case GL_RG16:
3833 case GL_RG16_SNORM:
3834 case GL_RGB16:
3835 case GL_RGB16_SNORM:
3836 case GL_RGBA16:
3837 case GL_RGBA16_SNORM:
3838 return _mesa_has_EXT_texture_norm16(ctx);
3839 case GL_R32F:
3840 case GL_RG32F:
3841 case GL_RGB32F:
3842 case GL_RGBA32F:
3843 /* The OES_texture_float_linear spec says:
3844 *
3845 * "When implemented against OpenGL ES 3.0 or later versions, sized
3846 * 32-bit floating-point formats become texture-filterable. This
3847 * should be noted by, for example, checking the ``TF'' column of
3848 * table 8.13 in the ES 3.1 Specification (``Correspondence of sized
3849 * internal formats to base internal formats ... and use cases ...'')
3850 * for the R32F, RG32F, RGB32F, and RGBA32F formats."
3851 */
3852 return ctx->Extensions.OES_texture_float_linear;
3853 default:
3854 return false;
3855 }
3856 }