mesa: add fallthrough comments to glformats.c
[mesa.git] / src / mesa / main / glformats.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008-2009 VMware, Inc.
6 * Copyright (c) 2012 Intel Corporation
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28 #include "context.h"
29 #include "glformats.h"
30 #include "formats.h"
31 #include "texcompress.h"
32 #include "enums.h"
33
34 enum {
35 ZERO = 4,
36 ONE = 5
37 };
38
39 enum {
40 IDX_LUMINANCE = 0,
41 IDX_ALPHA,
42 IDX_INTENSITY,
43 IDX_LUMINANCE_ALPHA,
44 IDX_RGB,
45 IDX_RGBA,
46 IDX_RED,
47 IDX_GREEN,
48 IDX_BLUE,
49 IDX_BGR,
50 IDX_BGRA,
51 IDX_ABGR,
52 IDX_RG,
53 MAX_IDX
54 };
55
56 #define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
57 #define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
58 #define MAP3(x,y,z) MAP4(x, y, z, ZERO)
59 #define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
60
61 static const struct {
62 GLubyte format_idx;
63 GLubyte to_rgba[6];
64 GLubyte from_rgba[6];
65 } mappings[MAX_IDX] =
66 {
67 {
68 IDX_LUMINANCE,
69 MAP4(0,0,0,ONE),
70 MAP1(0)
71 },
72
73 {
74 IDX_ALPHA,
75 MAP4(ZERO, ZERO, ZERO, 0),
76 MAP1(3)
77 },
78
79 {
80 IDX_INTENSITY,
81 MAP4(0, 0, 0, 0),
82 MAP1(0),
83 },
84
85 {
86 IDX_LUMINANCE_ALPHA,
87 MAP4(0,0,0,1),
88 MAP2(0,3)
89 },
90
91 {
92 IDX_RGB,
93 MAP4(0,1,2,ONE),
94 MAP3(0,1,2)
95 },
96
97 {
98 IDX_RGBA,
99 MAP4(0,1,2,3),
100 MAP4(0,1,2,3),
101 },
102
103 {
104 IDX_RED,
105 MAP4(0, ZERO, ZERO, ONE),
106 MAP1(0),
107 },
108
109 {
110 IDX_GREEN,
111 MAP4(ZERO, 0, ZERO, ONE),
112 MAP1(1),
113 },
114
115 {
116 IDX_BLUE,
117 MAP4(ZERO, ZERO, 0, ONE),
118 MAP1(2),
119 },
120
121 {
122 IDX_BGR,
123 MAP4(2,1,0,ONE),
124 MAP3(2,1,0)
125 },
126
127 {
128 IDX_BGRA,
129 MAP4(2,1,0,3),
130 MAP4(2,1,0,3)
131 },
132
133 {
134 IDX_ABGR,
135 MAP4(3,2,1,0),
136 MAP4(3,2,1,0)
137 },
138
139 {
140 IDX_RG,
141 MAP4(0, 1, ZERO, ONE),
142 MAP2(0, 1)
143 },
144 };
145
146 /**
147 * Convert a GL image format enum to an IDX_* value (see above).
148 */
149 static int
150 get_map_idx(GLenum value)
151 {
152 switch (value) {
153 case GL_LUMINANCE:
154 case GL_LUMINANCE_INTEGER_EXT:
155 return IDX_LUMINANCE;
156 case GL_ALPHA:
157 case GL_ALPHA_INTEGER:
158 return IDX_ALPHA;
159 case GL_INTENSITY:
160 return IDX_INTENSITY;
161 case GL_LUMINANCE_ALPHA:
162 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
163 return IDX_LUMINANCE_ALPHA;
164 case GL_RGB:
165 case GL_RGB_INTEGER:
166 return IDX_RGB;
167 case GL_RGBA:
168 case GL_RGBA_INTEGER:
169 return IDX_RGBA;
170 case GL_RED:
171 case GL_RED_INTEGER:
172 return IDX_RED;
173 case GL_GREEN:
174 return IDX_GREEN;
175 case GL_BLUE:
176 return IDX_BLUE;
177 case GL_BGR:
178 case GL_BGR_INTEGER:
179 return IDX_BGR;
180 case GL_BGRA:
181 case GL_BGRA_INTEGER:
182 return IDX_BGRA;
183 case GL_ABGR_EXT:
184 return IDX_ABGR;
185 case GL_RG:
186 case GL_RG_INTEGER:
187 return IDX_RG;
188 default:
189 _mesa_problem(NULL, "Unexpected inFormat %s",
190 _mesa_enum_to_string(value));
191 return 0;
192 }
193 }
194
195 /**
196 * When promoting texture formats (see below) we need to compute the
197 * mapping of dest components back to source components.
198 * This function does that.
199 * \param inFormat the incoming format of the texture
200 * \param outFormat the final texture format
201 * \return map[6] a full 6-component map
202 */
203 void
204 _mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
205 {
206 const int inFmt = get_map_idx(inFormat);
207 const int outFmt = get_map_idx(outFormat);
208 const GLubyte *in2rgba = mappings[inFmt].to_rgba;
209 const GLubyte *rgba2out = mappings[outFmt].from_rgba;
210 int i;
211
212 for (i = 0; i < 4; i++)
213 map[i] = in2rgba[rgba2out[i]];
214
215 map[ZERO] = ZERO;
216 map[ONE] = ONE;
217
218 #if 0
219 printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
220 inFormat, _mesa_enum_to_string(inFormat),
221 outFormat, _mesa_enum_to_string(outFormat),
222 map[0],
223 map[1],
224 map[2],
225 map[3],
226 map[4],
227 map[5]);
228 #endif
229 }
230
231 /**
232 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
233 */
234 GLboolean
235 _mesa_type_is_packed(GLenum type)
236 {
237 switch (type) {
238 case GL_UNSIGNED_BYTE_3_3_2:
239 case GL_UNSIGNED_BYTE_2_3_3_REV:
240 case MESA_UNSIGNED_BYTE_4_4:
241 case GL_UNSIGNED_SHORT_5_6_5:
242 case GL_UNSIGNED_SHORT_5_6_5_REV:
243 case GL_UNSIGNED_SHORT_4_4_4_4:
244 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
245 case GL_UNSIGNED_SHORT_5_5_5_1:
246 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
247 case GL_UNSIGNED_INT_8_8_8_8:
248 case GL_UNSIGNED_INT_8_8_8_8_REV:
249 case GL_UNSIGNED_INT_10_10_10_2:
250 case GL_UNSIGNED_INT_2_10_10_10_REV:
251 case GL_UNSIGNED_SHORT_8_8_MESA:
252 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
253 case GL_UNSIGNED_INT_24_8_EXT:
254 case GL_UNSIGNED_INT_5_9_9_9_REV:
255 case GL_UNSIGNED_INT_10F_11F_11F_REV:
256 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
257 return GL_TRUE;
258 }
259
260 return GL_FALSE;
261 }
262
263
264 /**
265 * Get the size of a GL data type.
266 *
267 * \param type GL data type.
268 *
269 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
270 * if an invalid type enum.
271 */
272 GLint
273 _mesa_sizeof_type(GLenum type)
274 {
275 switch (type) {
276 case GL_BITMAP:
277 return 0;
278 case GL_UNSIGNED_BYTE:
279 return sizeof(GLubyte);
280 case GL_BYTE:
281 return sizeof(GLbyte);
282 case GL_UNSIGNED_SHORT:
283 return sizeof(GLushort);
284 case GL_SHORT:
285 return sizeof(GLshort);
286 case GL_UNSIGNED_INT:
287 return sizeof(GLuint);
288 case GL_INT:
289 return sizeof(GLint);
290 case GL_FLOAT:
291 return sizeof(GLfloat);
292 case GL_DOUBLE:
293 return sizeof(GLdouble);
294 case GL_HALF_FLOAT_ARB:
295 case GL_HALF_FLOAT_OES:
296 return sizeof(GLhalfARB);
297 case GL_FIXED:
298 return sizeof(GLfixed);
299 default:
300 return -1;
301 }
302 }
303
304
305 /**
306 * Same as _mesa_sizeof_type() but also accepting the packed pixel
307 * format data types.
308 */
309 GLint
310 _mesa_sizeof_packed_type(GLenum type)
311 {
312 switch (type) {
313 case GL_BITMAP:
314 return 0;
315 case GL_UNSIGNED_BYTE:
316 return sizeof(GLubyte);
317 case GL_BYTE:
318 return sizeof(GLbyte);
319 case GL_UNSIGNED_SHORT:
320 return sizeof(GLushort);
321 case GL_SHORT:
322 return sizeof(GLshort);
323 case GL_UNSIGNED_INT:
324 return sizeof(GLuint);
325 case GL_INT:
326 return sizeof(GLint);
327 case GL_HALF_FLOAT_ARB:
328 case GL_HALF_FLOAT_OES:
329 return sizeof(GLhalfARB);
330 case GL_FLOAT:
331 return sizeof(GLfloat);
332 case GL_UNSIGNED_BYTE_3_3_2:
333 case GL_UNSIGNED_BYTE_2_3_3_REV:
334 case MESA_UNSIGNED_BYTE_4_4:
335 return sizeof(GLubyte);
336 case GL_UNSIGNED_SHORT_5_6_5:
337 case GL_UNSIGNED_SHORT_5_6_5_REV:
338 case GL_UNSIGNED_SHORT_4_4_4_4:
339 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
340 case GL_UNSIGNED_SHORT_5_5_5_1:
341 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
342 case GL_UNSIGNED_SHORT_8_8_MESA:
343 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
344 return sizeof(GLushort);
345 case GL_UNSIGNED_INT_8_8_8_8:
346 case GL_UNSIGNED_INT_8_8_8_8_REV:
347 case GL_UNSIGNED_INT_10_10_10_2:
348 case GL_UNSIGNED_INT_2_10_10_10_REV:
349 case GL_UNSIGNED_INT_24_8_EXT:
350 case GL_UNSIGNED_INT_5_9_9_9_REV:
351 case GL_UNSIGNED_INT_10F_11F_11F_REV:
352 return sizeof(GLuint);
353 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
354 return 8;
355 default:
356 return -1;
357 }
358 }
359
360
361 /**
362 * Get the number of components in a pixel format.
363 *
364 * \param format pixel format.
365 *
366 * \return the number of components in the given format, or -1 if a bad format.
367 */
368 GLint
369 _mesa_components_in_format(GLenum format)
370 {
371 switch (format) {
372 case GL_COLOR_INDEX:
373 case GL_STENCIL_INDEX:
374 case GL_DEPTH_COMPONENT:
375 case GL_RED:
376 case GL_RED_INTEGER_EXT:
377 case GL_GREEN:
378 case GL_GREEN_INTEGER_EXT:
379 case GL_BLUE:
380 case GL_BLUE_INTEGER_EXT:
381 case GL_ALPHA:
382 case GL_ALPHA_INTEGER_EXT:
383 case GL_LUMINANCE:
384 case GL_LUMINANCE_INTEGER_EXT:
385 case GL_INTENSITY:
386 return 1;
387
388 case GL_LUMINANCE_ALPHA:
389 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
390 case GL_RG:
391 case GL_YCBCR_MESA:
392 case GL_DEPTH_STENCIL_EXT:
393 case GL_RG_INTEGER:
394 return 2;
395
396 case GL_RGB:
397 case GL_BGR:
398 case GL_RGB_INTEGER_EXT:
399 case GL_BGR_INTEGER_EXT:
400 return 3;
401
402 case GL_RGBA:
403 case GL_BGRA:
404 case GL_ABGR_EXT:
405 case GL_RGBA_INTEGER_EXT:
406 case GL_BGRA_INTEGER_EXT:
407 return 4;
408
409 default:
410 return -1;
411 }
412 }
413
414
415 /**
416 * Get the bytes per pixel of pixel format type pair.
417 *
418 * \param format pixel format.
419 * \param type pixel type.
420 *
421 * \return bytes per pixel, or -1 if a bad format or type was given.
422 */
423 GLint
424 _mesa_bytes_per_pixel(GLenum format, GLenum type)
425 {
426 GLint comps = _mesa_components_in_format(format);
427 if (comps < 0)
428 return -1;
429
430 switch (type) {
431 case GL_BITMAP:
432 return 0; /* special case */
433 case GL_BYTE:
434 case GL_UNSIGNED_BYTE:
435 return comps * sizeof(GLubyte);
436 case GL_SHORT:
437 case GL_UNSIGNED_SHORT:
438 return comps * sizeof(GLshort);
439 case GL_INT:
440 case GL_UNSIGNED_INT:
441 return comps * sizeof(GLint);
442 case GL_FLOAT:
443 return comps * sizeof(GLfloat);
444 case GL_HALF_FLOAT_ARB:
445 case GL_HALF_FLOAT_OES:
446 return comps * sizeof(GLhalfARB);
447 case GL_UNSIGNED_BYTE_3_3_2:
448 case GL_UNSIGNED_BYTE_2_3_3_REV:
449 if (format == GL_RGB || format == GL_BGR ||
450 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
451 return sizeof(GLubyte);
452 else
453 return -1; /* error */
454 case GL_UNSIGNED_SHORT_5_6_5:
455 case GL_UNSIGNED_SHORT_5_6_5_REV:
456 if (format == GL_RGB || format == GL_BGR ||
457 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
458 return sizeof(GLushort);
459 else
460 return -1; /* error */
461 case GL_UNSIGNED_SHORT_4_4_4_4:
462 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
463 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
464 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
465 return sizeof(GLushort);
466 else
467 return -1;
468 case GL_UNSIGNED_SHORT_5_5_5_1:
469 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
470 if (format == GL_RGBA || format == GL_BGRA ||
471 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
472 return sizeof(GLushort);
473 else
474 return -1;
475 case GL_UNSIGNED_INT_8_8_8_8:
476 case GL_UNSIGNED_INT_8_8_8_8_REV:
477 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
478 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
479 format == GL_RGB)
480 return sizeof(GLuint);
481 else
482 return -1;
483 case GL_UNSIGNED_INT_10_10_10_2:
484 case GL_UNSIGNED_INT_2_10_10_10_REV:
485 if (format == GL_RGBA || format == GL_BGRA ||
486 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
487 format == GL_RGB)
488 return sizeof(GLuint);
489 else
490 return -1;
491 case GL_UNSIGNED_SHORT_8_8_MESA:
492 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
493 if (format == GL_YCBCR_MESA)
494 return sizeof(GLushort);
495 else
496 return -1;
497 case GL_UNSIGNED_INT_24_8_EXT:
498 if (format == GL_DEPTH_COMPONENT ||
499 format == GL_DEPTH_STENCIL_EXT)
500 return sizeof(GLuint);
501 else
502 return -1;
503 case GL_UNSIGNED_INT_5_9_9_9_REV:
504 if (format == GL_RGB)
505 return sizeof(GLuint);
506 else
507 return -1;
508 case GL_UNSIGNED_INT_10F_11F_11F_REV:
509 if (format == GL_RGB)
510 return sizeof(GLuint);
511 else
512 return -1;
513 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
514 if (format == GL_DEPTH_STENCIL)
515 return 8;
516 else
517 return -1;
518 default:
519 return -1;
520 }
521 }
522
523
524 /**
525 * Get the number of bytes for a vertex attrib with the given number of
526 * components and type.
527 *
528 * \param comps number of components.
529 * \param type data type.
530 *
531 * \return bytes per attribute, or -1 if a bad comps/type combination was given.
532 */
533 GLint
534 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
535 {
536 switch (type) {
537 case GL_BYTE:
538 case GL_UNSIGNED_BYTE:
539 return comps * sizeof(GLubyte);
540 case GL_SHORT:
541 case GL_UNSIGNED_SHORT:
542 return comps * sizeof(GLshort);
543 case GL_INT:
544 case GL_UNSIGNED_INT:
545 return comps * sizeof(GLint);
546 case GL_FLOAT:
547 return comps * sizeof(GLfloat);
548 case GL_HALF_FLOAT_ARB:
549 case GL_HALF_FLOAT_OES:
550 return comps * sizeof(GLhalfARB);
551 case GL_DOUBLE:
552 return comps * sizeof(GLdouble);
553 case GL_FIXED:
554 return comps * sizeof(GLfixed);
555 case GL_INT_2_10_10_10_REV:
556 case GL_UNSIGNED_INT_2_10_10_10_REV:
557 if (comps == 4)
558 return sizeof(GLuint);
559 else
560 return -1;
561 case GL_UNSIGNED_INT_10F_11F_11F_REV:
562 if (comps == 3)
563 return sizeof(GLuint);
564 else
565 return -1;
566 case GL_UNSIGNED_INT64_ARB:
567 return comps * 8;
568 default:
569 return -1;
570 }
571 }
572
573 /**
574 * Test if the given format is unsized.
575 */
576 GLboolean
577 _mesa_is_enum_format_unsized(GLenum format)
578 {
579 switch (format) {
580 case GL_RGBA:
581 case GL_BGRA:
582 case GL_ABGR_EXT:
583 case GL_RGB:
584 case GL_BGR:
585 case GL_RG:
586 case GL_RED:
587 case GL_GREEN:
588 case GL_BLUE:
589 case GL_ALPHA:
590 case GL_INTENSITY:
591 case GL_LUMINANCE:
592 case GL_LUMINANCE_ALPHA:
593
594 case GL_SRGB:
595 case GL_SRGB_ALPHA:
596 case GL_SLUMINANCE:
597 case GL_SLUMINANCE_ALPHA:
598
599 case GL_RGBA_SNORM:
600 case GL_RGB_SNORM:
601 case GL_RG_SNORM:
602 case GL_RED_SNORM:
603 case GL_ALPHA_SNORM:
604 case GL_INTENSITY_SNORM:
605 case GL_LUMINANCE_SNORM:
606 case GL_LUMINANCE_ALPHA_SNORM:
607
608 case GL_RED_INTEGER:
609 case GL_GREEN_INTEGER:
610 case GL_BLUE_INTEGER:
611 case GL_ALPHA_INTEGER:
612 case GL_RGB_INTEGER:
613 case GL_RGBA_INTEGER:
614 case GL_BGR_INTEGER:
615 case GL_BGRA_INTEGER:
616 case GL_RG_INTEGER:
617 case GL_LUMINANCE_INTEGER_EXT:
618 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
619
620 case GL_DEPTH_COMPONENT:
621 case GL_DEPTH_STENCIL:
622 case GL_STENCIL_INDEX:
623 return GL_TRUE;
624 default:
625 return GL_FALSE;
626 }
627 }
628
629 /**
630 * Test if the given format is a UNORM (unsigned-normalized) format.
631 */
632 GLboolean
633 _mesa_is_enum_format_unorm(GLenum format)
634 {
635 switch(format) {
636 case GL_RED:
637 case GL_GREEN:
638 case GL_BLUE:
639 case GL_ALPHA:
640 case GL_ALPHA4:
641 case GL_ALPHA8:
642 case GL_ALPHA12:
643 case GL_ALPHA16:
644 case 1:
645 case GL_LUMINANCE:
646 case GL_SLUMINANCE:
647 case GL_LUMINANCE4:
648 case GL_LUMINANCE8:
649 case GL_LUMINANCE12:
650 case GL_LUMINANCE16:
651 case 2:
652 case GL_LUMINANCE_ALPHA:
653 case GL_SLUMINANCE_ALPHA:
654 case GL_LUMINANCE4_ALPHA4:
655 case GL_LUMINANCE6_ALPHA2:
656 case GL_LUMINANCE8_ALPHA8:
657 case GL_LUMINANCE12_ALPHA4:
658 case GL_LUMINANCE12_ALPHA12:
659 case GL_LUMINANCE16_ALPHA16:
660 case GL_INTENSITY:
661 case GL_INTENSITY4:
662 case GL_INTENSITY8:
663 case GL_INTENSITY12:
664 case GL_INTENSITY16:
665 case GL_R8:
666 case GL_R16:
667 case GL_RG:
668 case GL_RG8:
669 case GL_RG16:
670 case 3:
671 case GL_RGB:
672 case GL_BGR:
673 case GL_SRGB:
674 case GL_R3_G3_B2:
675 case GL_RGB4:
676 case GL_RGB5:
677 case GL_RGB565:
678 case GL_RGB8:
679 case GL_RGB10:
680 case GL_RGB12:
681 case GL_RGB16:
682 case 4:
683 case GL_ABGR_EXT:
684 case GL_RGBA:
685 case GL_BGRA:
686 case GL_SRGB_ALPHA:
687 case GL_RGBA2:
688 case GL_RGBA4:
689 case GL_RGB5_A1:
690 case GL_RGBA8:
691 case GL_RGB10_A2:
692 case GL_RGBA12:
693 case GL_RGBA16:
694 return GL_TRUE;
695 default:
696 return GL_FALSE;
697 }
698 }
699
700 /**
701 * Test if the given format is a SNORM (signed-normalized) format.
702 */
703 GLboolean
704 _mesa_is_enum_format_snorm(GLenum format)
705 {
706 switch (format) {
707 /* signed, normalized texture formats */
708 case GL_RED_SNORM:
709 case GL_R8_SNORM:
710 case GL_R16_SNORM:
711 case GL_RG_SNORM:
712 case GL_RG8_SNORM:
713 case GL_RG16_SNORM:
714 case GL_RGB_SNORM:
715 case GL_RGB8_SNORM:
716 case GL_RGB16_SNORM:
717 case GL_RGBA_SNORM:
718 case GL_RGBA8_SNORM:
719 case GL_RGBA16_SNORM:
720 case GL_ALPHA_SNORM:
721 case GL_ALPHA8_SNORM:
722 case GL_ALPHA16_SNORM:
723 case GL_LUMINANCE_SNORM:
724 case GL_LUMINANCE8_SNORM:
725 case GL_LUMINANCE16_SNORM:
726 case GL_LUMINANCE_ALPHA_SNORM:
727 case GL_LUMINANCE8_ALPHA8_SNORM:
728 case GL_LUMINANCE16_ALPHA16_SNORM:
729 case GL_INTENSITY_SNORM:
730 case GL_INTENSITY8_SNORM:
731 case GL_INTENSITY16_SNORM:
732 return GL_TRUE;
733 default:
734 return GL_FALSE;
735 }
736 }
737
738 /**
739 * Test if the given format is an integer (non-normalized) format.
740 */
741 GLboolean
742 _mesa_is_enum_format_unsigned_int(GLenum format)
743 {
744 switch (format) {
745 /* specific integer formats */
746 case GL_RGBA32UI_EXT:
747 case GL_RGB32UI_EXT:
748 case GL_RG32UI:
749 case GL_R32UI:
750 case GL_ALPHA32UI_EXT:
751 case GL_INTENSITY32UI_EXT:
752 case GL_LUMINANCE32UI_EXT:
753 case GL_LUMINANCE_ALPHA32UI_EXT:
754 case GL_RGBA16UI_EXT:
755 case GL_RGB16UI_EXT:
756 case GL_RG16UI:
757 case GL_R16UI:
758 case GL_ALPHA16UI_EXT:
759 case GL_INTENSITY16UI_EXT:
760 case GL_LUMINANCE16UI_EXT:
761 case GL_LUMINANCE_ALPHA16UI_EXT:
762 case GL_RGBA8UI_EXT:
763 case GL_RGB8UI_EXT:
764 case GL_RG8UI:
765 case GL_R8UI:
766 case GL_ALPHA8UI_EXT:
767 case GL_INTENSITY8UI_EXT:
768 case GL_LUMINANCE8UI_EXT:
769 case GL_LUMINANCE_ALPHA8UI_EXT:
770 case GL_RGB10_A2UI:
771 return GL_TRUE;
772 default:
773 return GL_FALSE;
774 }
775 }
776
777
778 /**
779 * Test if the given format is an integer (non-normalized) format.
780 */
781 GLboolean
782 _mesa_is_enum_format_signed_int(GLenum format)
783 {
784 switch (format) {
785 /* generic integer formats */
786 case GL_RED_INTEGER_EXT:
787 case GL_GREEN_INTEGER_EXT:
788 case GL_BLUE_INTEGER_EXT:
789 case GL_ALPHA_INTEGER_EXT:
790 case GL_RGB_INTEGER_EXT:
791 case GL_RGBA_INTEGER_EXT:
792 case GL_BGR_INTEGER_EXT:
793 case GL_BGRA_INTEGER_EXT:
794 case GL_LUMINANCE_INTEGER_EXT:
795 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
796 case GL_RG_INTEGER:
797 /* specific integer formats */
798 case GL_RGBA32I_EXT:
799 case GL_RGB32I_EXT:
800 case GL_RG32I:
801 case GL_R32I:
802 case GL_ALPHA32I_EXT:
803 case GL_INTENSITY32I_EXT:
804 case GL_LUMINANCE32I_EXT:
805 case GL_LUMINANCE_ALPHA32I_EXT:
806 case GL_RGBA16I_EXT:
807 case GL_RGB16I_EXT:
808 case GL_RG16I:
809 case GL_R16I:
810 case GL_ALPHA16I_EXT:
811 case GL_INTENSITY16I_EXT:
812 case GL_LUMINANCE16I_EXT:
813 case GL_LUMINANCE_ALPHA16I_EXT:
814 case GL_RGBA8I_EXT:
815 case GL_RGB8I_EXT:
816 case GL_RG8I:
817 case GL_R8I:
818 case GL_ALPHA8I_EXT:
819 case GL_INTENSITY8I_EXT:
820 case GL_LUMINANCE8I_EXT:
821 case GL_LUMINANCE_ALPHA8I_EXT:
822 return GL_TRUE;
823 default:
824 return GL_FALSE;
825 }
826 }
827
828 /**
829 * Test if the given format is an ASTC 2D format.
830 */
831 static bool
832 is_astc_2d_format(GLenum internalFormat)
833 {
834 switch (internalFormat) {
835 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
844 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
845 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
846 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
847 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
848 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
858 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
859 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
860 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
861 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
862 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
863 return true;
864 default:
865 return false;
866 }
867 }
868
869 /**
870 * Test if the given format is an ASTC 3D format.
871 */
872 static bool
873 is_astc_3d_format(GLenum internalFormat)
874 {
875 switch (internalFormat) {
876 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
877 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
878 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
879 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
880 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
881 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
882 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
883 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
884 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
885 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
886 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
887 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
888 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
889 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
890 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
891 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
892 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
893 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
894 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
895 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
896 return true;
897 default:
898 return false;
899 }
900 }
901
902 /**
903 * Test if the given format is an ASTC format.
904 */
905 GLboolean
906 _mesa_is_astc_format(GLenum internalFormat)
907 {
908 return is_astc_2d_format(internalFormat) ||
909 is_astc_3d_format(internalFormat);
910 }
911
912 /**
913 * Test if the given format is an ETC2 format.
914 */
915 GLboolean
916 _mesa_is_etc2_format(GLenum internalFormat)
917 {
918 switch (internalFormat) {
919 case GL_COMPRESSED_RGB8_ETC2:
920 case GL_COMPRESSED_SRGB8_ETC2:
921 case GL_COMPRESSED_RGBA8_ETC2_EAC:
922 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
923 case GL_COMPRESSED_R11_EAC:
924 case GL_COMPRESSED_RG11_EAC:
925 case GL_COMPRESSED_SIGNED_R11_EAC:
926 case GL_COMPRESSED_SIGNED_RG11_EAC:
927 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
928 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
929 return true;
930 default:
931 return false;
932 }
933 }
934
935 /**
936 * Test if the given format is an integer (non-normalized) format.
937 */
938 GLboolean
939 _mesa_is_enum_format_integer(GLenum format)
940 {
941 return _mesa_is_enum_format_unsigned_int(format) ||
942 _mesa_is_enum_format_signed_int(format);
943 }
944
945
946 GLboolean
947 _mesa_is_type_unsigned(GLenum type)
948 {
949 switch (type) {
950 case GL_UNSIGNED_INT:
951 case GL_UNSIGNED_INT_8_8_8_8:
952 case GL_UNSIGNED_INT_8_8_8_8_REV:
953 case GL_UNSIGNED_INT_10_10_10_2:
954 case GL_UNSIGNED_INT_2_10_10_10_REV:
955
956 case GL_UNSIGNED_SHORT:
957 case GL_UNSIGNED_SHORT_4_4_4_4:
958 case GL_UNSIGNED_SHORT_5_5_5_1:
959 case GL_UNSIGNED_SHORT_5_6_5:
960 case GL_UNSIGNED_SHORT_5_6_5_REV:
961 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
962 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
963 case GL_UNSIGNED_SHORT_8_8_MESA:
964 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
965
966 case GL_UNSIGNED_BYTE:
967 case GL_UNSIGNED_BYTE_3_3_2:
968 case GL_UNSIGNED_BYTE_2_3_3_REV:
969 return GL_TRUE;
970
971 default:
972 return GL_FALSE;
973 }
974 }
975
976
977 /**
978 * Test if the given image format is a color/RGBA format (i.e., not color
979 * index, depth, stencil, etc).
980 * \param format the image format value (may by an internal texture format)
981 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
982 */
983 GLboolean
984 _mesa_is_color_format(GLenum format)
985 {
986 switch (format) {
987 case GL_RED:
988 case GL_GREEN:
989 case GL_BLUE:
990 case GL_ALPHA:
991 case GL_ALPHA4:
992 case GL_ALPHA8:
993 case GL_ALPHA12:
994 case GL_ALPHA16:
995 case 1:
996 case GL_LUMINANCE:
997 case GL_LUMINANCE4:
998 case GL_LUMINANCE8:
999 case GL_LUMINANCE12:
1000 case GL_LUMINANCE16:
1001 case 2:
1002 case GL_LUMINANCE_ALPHA:
1003 case GL_LUMINANCE4_ALPHA4:
1004 case GL_LUMINANCE6_ALPHA2:
1005 case GL_LUMINANCE8_ALPHA8:
1006 case GL_LUMINANCE12_ALPHA4:
1007 case GL_LUMINANCE12_ALPHA12:
1008 case GL_LUMINANCE16_ALPHA16:
1009 case GL_INTENSITY:
1010 case GL_INTENSITY4:
1011 case GL_INTENSITY8:
1012 case GL_INTENSITY12:
1013 case GL_INTENSITY16:
1014 case GL_R8:
1015 case GL_R16:
1016 case GL_RG:
1017 case GL_RG8:
1018 case GL_RG16:
1019 case 3:
1020 case GL_RGB:
1021 case GL_BGR:
1022 case GL_R3_G3_B2:
1023 case GL_RGB4:
1024 case GL_RGB5:
1025 case GL_RGB565:
1026 case GL_RGB8:
1027 case GL_RGB10:
1028 case GL_RGB12:
1029 case GL_RGB16:
1030 case 4:
1031 case GL_ABGR_EXT:
1032 case GL_RGBA:
1033 case GL_BGRA:
1034 case GL_RGBA2:
1035 case GL_RGBA4:
1036 case GL_RGB5_A1:
1037 case GL_RGBA8:
1038 case GL_RGB10_A2:
1039 case GL_RGBA12:
1040 case GL_RGBA16:
1041 /* float texture formats */
1042 case GL_ALPHA16F_ARB:
1043 case GL_ALPHA32F_ARB:
1044 case GL_LUMINANCE16F_ARB:
1045 case GL_LUMINANCE32F_ARB:
1046 case GL_LUMINANCE_ALPHA16F_ARB:
1047 case GL_LUMINANCE_ALPHA32F_ARB:
1048 case GL_INTENSITY16F_ARB:
1049 case GL_INTENSITY32F_ARB:
1050 case GL_R16F:
1051 case GL_R32F:
1052 case GL_RG16F:
1053 case GL_RG32F:
1054 case GL_RGB16F_ARB:
1055 case GL_RGB32F_ARB:
1056 case GL_RGBA16F_ARB:
1057 case GL_RGBA32F_ARB:
1058 /* compressed formats */
1059 case GL_COMPRESSED_ALPHA:
1060 case GL_COMPRESSED_LUMINANCE:
1061 case GL_COMPRESSED_LUMINANCE_ALPHA:
1062 case GL_COMPRESSED_INTENSITY:
1063 case GL_COMPRESSED_RED:
1064 case GL_COMPRESSED_RG:
1065 case GL_COMPRESSED_RGB:
1066 case GL_COMPRESSED_RGBA:
1067 case GL_RGB_S3TC:
1068 case GL_RGB4_S3TC:
1069 case GL_RGBA_S3TC:
1070 case GL_RGBA4_S3TC:
1071 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1072 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1073 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1074 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1075 case GL_COMPRESSED_RGB_FXT1_3DFX:
1076 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1077 case GL_SRGB_EXT:
1078 case GL_SRGB8_EXT:
1079 case GL_SRGB_ALPHA_EXT:
1080 case GL_SRGB8_ALPHA8_EXT:
1081 case GL_SLUMINANCE_ALPHA_EXT:
1082 case GL_SLUMINANCE8_ALPHA8_EXT:
1083 case GL_SLUMINANCE_EXT:
1084 case GL_SLUMINANCE8_EXT:
1085 case GL_COMPRESSED_SRGB_EXT:
1086 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1087 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1088 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1089 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1090 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1091 case GL_COMPRESSED_SLUMINANCE_EXT:
1092 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1093 case GL_COMPRESSED_RED_RGTC1:
1094 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1095 case GL_COMPRESSED_RG_RGTC2:
1096 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1097 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1098 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1099 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1100 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1101 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1102 case GL_ETC1_RGB8_OES:
1103 case GL_COMPRESSED_RGB8_ETC2:
1104 case GL_COMPRESSED_SRGB8_ETC2:
1105 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1106 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1107 case GL_COMPRESSED_R11_EAC:
1108 case GL_COMPRESSED_RG11_EAC:
1109 case GL_COMPRESSED_SIGNED_R11_EAC:
1110 case GL_COMPRESSED_SIGNED_RG11_EAC:
1111 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1112 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1113 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1114 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1115 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1116 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1117 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1118 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1119 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1120 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1121 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1122 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1123 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1124 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1125 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1126 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1127 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1128 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1129 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1130 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1131 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1132 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1133 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1134 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1135 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1136 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1137 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1138 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1139 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1140 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1141 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1142 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1143 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1144 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1145 case GL_ATC_RGB_AMD:
1146 case GL_ATC_RGBA_EXPLICIT_ALPHA_AMD:
1147 case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
1148 /* generic integer formats */
1149 case GL_RED_INTEGER_EXT:
1150 case GL_GREEN_INTEGER_EXT:
1151 case GL_BLUE_INTEGER_EXT:
1152 case GL_ALPHA_INTEGER_EXT:
1153 case GL_RGB_INTEGER_EXT:
1154 case GL_RGBA_INTEGER_EXT:
1155 case GL_BGR_INTEGER_EXT:
1156 case GL_BGRA_INTEGER_EXT:
1157 case GL_RG_INTEGER:
1158 case GL_LUMINANCE_INTEGER_EXT:
1159 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1160 /* sized integer formats */
1161 case GL_RGBA32UI_EXT:
1162 case GL_RGB32UI_EXT:
1163 case GL_RG32UI:
1164 case GL_R32UI:
1165 case GL_ALPHA32UI_EXT:
1166 case GL_INTENSITY32UI_EXT:
1167 case GL_LUMINANCE32UI_EXT:
1168 case GL_LUMINANCE_ALPHA32UI_EXT:
1169 case GL_RGBA16UI_EXT:
1170 case GL_RGB16UI_EXT:
1171 case GL_RG16UI:
1172 case GL_R16UI:
1173 case GL_ALPHA16UI_EXT:
1174 case GL_INTENSITY16UI_EXT:
1175 case GL_LUMINANCE16UI_EXT:
1176 case GL_LUMINANCE_ALPHA16UI_EXT:
1177 case GL_RGBA8UI_EXT:
1178 case GL_RGB8UI_EXT:
1179 case GL_RG8UI:
1180 case GL_R8UI:
1181 case GL_ALPHA8UI_EXT:
1182 case GL_INTENSITY8UI_EXT:
1183 case GL_LUMINANCE8UI_EXT:
1184 case GL_LUMINANCE_ALPHA8UI_EXT:
1185 case GL_RGBA32I_EXT:
1186 case GL_RGB32I_EXT:
1187 case GL_RG32I:
1188 case GL_R32I:
1189 case GL_ALPHA32I_EXT:
1190 case GL_INTENSITY32I_EXT:
1191 case GL_LUMINANCE32I_EXT:
1192 case GL_LUMINANCE_ALPHA32I_EXT:
1193 case GL_RGBA16I_EXT:
1194 case GL_RGB16I_EXT:
1195 case GL_RG16I:
1196 case GL_R16I:
1197 case GL_ALPHA16I_EXT:
1198 case GL_INTENSITY16I_EXT:
1199 case GL_LUMINANCE16I_EXT:
1200 case GL_LUMINANCE_ALPHA16I_EXT:
1201 case GL_RGBA8I_EXT:
1202 case GL_RGB8I_EXT:
1203 case GL_RG8I:
1204 case GL_R8I:
1205 case GL_ALPHA8I_EXT:
1206 case GL_INTENSITY8I_EXT:
1207 case GL_LUMINANCE8I_EXT:
1208 case GL_LUMINANCE_ALPHA8I_EXT:
1209 /* signed, normalized texture formats */
1210 case GL_RED_SNORM:
1211 case GL_R8_SNORM:
1212 case GL_R16_SNORM:
1213 case GL_RG_SNORM:
1214 case GL_RG8_SNORM:
1215 case GL_RG16_SNORM:
1216 case GL_RGB_SNORM:
1217 case GL_RGB8_SNORM:
1218 case GL_RGB16_SNORM:
1219 case GL_RGBA_SNORM:
1220 case GL_RGBA8_SNORM:
1221 case GL_RGBA16_SNORM:
1222 case GL_ALPHA_SNORM:
1223 case GL_ALPHA8_SNORM:
1224 case GL_ALPHA16_SNORM:
1225 case GL_LUMINANCE_SNORM:
1226 case GL_LUMINANCE8_SNORM:
1227 case GL_LUMINANCE16_SNORM:
1228 case GL_LUMINANCE_ALPHA_SNORM:
1229 case GL_LUMINANCE8_ALPHA8_SNORM:
1230 case GL_LUMINANCE16_ALPHA16_SNORM:
1231 case GL_INTENSITY_SNORM:
1232 case GL_INTENSITY8_SNORM:
1233 case GL_INTENSITY16_SNORM:
1234 case GL_RGB9_E5:
1235 case GL_R11F_G11F_B10F:
1236 case GL_RGB10_A2UI:
1237 return GL_TRUE;
1238 case GL_YCBCR_MESA: /* not considered to be RGB */
1239 /* fall-through */
1240 default:
1241 return GL_FALSE;
1242 }
1243 }
1244
1245
1246 /**
1247 * Test if the given image format is a depth component format.
1248 */
1249 GLboolean
1250 _mesa_is_depth_format(GLenum format)
1251 {
1252 switch (format) {
1253 case GL_DEPTH_COMPONENT:
1254 case GL_DEPTH_COMPONENT16:
1255 case GL_DEPTH_COMPONENT24:
1256 case GL_DEPTH_COMPONENT32:
1257 case GL_DEPTH_COMPONENT32F:
1258 return GL_TRUE;
1259 default:
1260 return GL_FALSE;
1261 }
1262 }
1263
1264
1265 /**
1266 * Test if the given image format is a stencil format.
1267 */
1268 GLboolean
1269 _mesa_is_stencil_format(GLenum format)
1270 {
1271 switch (format) {
1272 case GL_STENCIL_INDEX:
1273 return GL_TRUE;
1274 default:
1275 return GL_FALSE;
1276 }
1277 }
1278
1279
1280 /**
1281 * Test if the given image format is a YCbCr format.
1282 */
1283 GLboolean
1284 _mesa_is_ycbcr_format(GLenum format)
1285 {
1286 switch (format) {
1287 case GL_YCBCR_MESA:
1288 return GL_TRUE;
1289 default:
1290 return GL_FALSE;
1291 }
1292 }
1293
1294
1295 /**
1296 * Test if the given image format is a depth+stencil format.
1297 */
1298 GLboolean
1299 _mesa_is_depthstencil_format(GLenum format)
1300 {
1301 switch (format) {
1302 case GL_DEPTH24_STENCIL8_EXT:
1303 case GL_DEPTH_STENCIL_EXT:
1304 case GL_DEPTH32F_STENCIL8:
1305 return GL_TRUE;
1306 default:
1307 return GL_FALSE;
1308 }
1309 }
1310
1311
1312 /**
1313 * Test if the given image format is a depth or stencil format.
1314 */
1315 GLboolean
1316 _mesa_is_depth_or_stencil_format(GLenum format)
1317 {
1318 switch (format) {
1319 case GL_DEPTH_COMPONENT:
1320 case GL_DEPTH_COMPONENT16:
1321 case GL_DEPTH_COMPONENT24:
1322 case GL_DEPTH_COMPONENT32:
1323 case GL_STENCIL_INDEX:
1324 case GL_STENCIL_INDEX1_EXT:
1325 case GL_STENCIL_INDEX4_EXT:
1326 case GL_STENCIL_INDEX8_EXT:
1327 case GL_STENCIL_INDEX16_EXT:
1328 case GL_DEPTH_STENCIL_EXT:
1329 case GL_DEPTH24_STENCIL8_EXT:
1330 case GL_DEPTH_COMPONENT32F:
1331 case GL_DEPTH32F_STENCIL8:
1332 return GL_TRUE;
1333 default:
1334 return GL_FALSE;
1335 }
1336 }
1337
1338
1339 /**
1340 * Test if an image format is a supported compressed format.
1341 * \param format the internal format token provided by the user.
1342 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1343 */
1344 GLboolean
1345 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1346 {
1347 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1348
1349 /* Some formats in this switch have an equivalent mesa_format_layout
1350 * to the compressed formats in the layout switch below and thus
1351 * must be handled first.
1352 */
1353 switch (format) {
1354 case GL_RGB_S3TC:
1355 case GL_RGB4_S3TC:
1356 case GL_RGBA_S3TC:
1357 case GL_RGBA4_S3TC:
1358 return _mesa_has_S3_s3tc(ctx);
1359 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1360 return _mesa_has_ATI_texture_compression_3dc(ctx);
1361 case GL_PALETTE4_RGB8_OES:
1362 case GL_PALETTE4_RGBA8_OES:
1363 case GL_PALETTE4_R5_G6_B5_OES:
1364 case GL_PALETTE4_RGBA4_OES:
1365 case GL_PALETTE4_RGB5_A1_OES:
1366 case GL_PALETTE8_RGB8_OES:
1367 case GL_PALETTE8_RGBA8_OES:
1368 case GL_PALETTE8_R5_G6_B5_OES:
1369 case GL_PALETTE8_RGBA4_OES:
1370 case GL_PALETTE8_RGB5_A1_OES:
1371 return ctx->API == API_OPENGLES;
1372 }
1373
1374 switch (_mesa_get_format_layout(m_format)) {
1375 case MESA_FORMAT_LAYOUT_S3TC:
1376 if (!_mesa_is_format_srgb(m_format)) {
1377 return _mesa_has_EXT_texture_compression_s3tc(ctx);
1378 } else {
1379 return (_mesa_has_EXT_texture_sRGB(ctx) ||
1380 _mesa_has_EXT_texture_compression_s3tc_srgb(ctx)) &&
1381 _mesa_has_EXT_texture_compression_s3tc(ctx);
1382 }
1383 case MESA_FORMAT_LAYOUT_FXT1:
1384 return _mesa_has_3DFX_texture_compression_FXT1(ctx);
1385 case MESA_FORMAT_LAYOUT_RGTC:
1386 return _mesa_has_ARB_texture_compression_rgtc(ctx) ||
1387 _mesa_has_EXT_texture_compression_rgtc(ctx);
1388 case MESA_FORMAT_LAYOUT_LATC:
1389 return _mesa_has_EXT_texture_compression_latc(ctx);
1390 case MESA_FORMAT_LAYOUT_ETC1:
1391 return _mesa_has_OES_compressed_ETC1_RGB8_texture(ctx);
1392 case MESA_FORMAT_LAYOUT_ETC2:
1393 return _mesa_is_gles3(ctx) || _mesa_has_ARB_ES3_compatibility(ctx);
1394 case MESA_FORMAT_LAYOUT_BPTC:
1395 return _mesa_has_ARB_texture_compression_bptc(ctx) ||
1396 _mesa_has_EXT_texture_compression_bptc(ctx);
1397 case MESA_FORMAT_LAYOUT_ASTC:
1398 return _mesa_has_KHR_texture_compression_astc_ldr(ctx);
1399 case MESA_FORMAT_LAYOUT_ATC:
1400 return _mesa_has_AMD_compressed_ATC_texture(ctx);
1401 default:
1402 return GL_FALSE;
1403 }
1404 }
1405
1406 /**
1407 * Test if the given format represents an sRGB format.
1408 * \param format the GL format (can be an internal format)
1409 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1410 */
1411 GLboolean
1412 _mesa_is_srgb_format(GLenum format)
1413 {
1414 switch (format) {
1415 case GL_SRGB:
1416 case GL_SRGB8:
1417 case GL_SRGB_ALPHA:
1418 case GL_SRGB8_ALPHA8:
1419 case GL_COMPRESSED_SRGB:
1420 case GL_COMPRESSED_SRGB_ALPHA:
1421 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1422 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1423 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1424 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1425 case GL_COMPRESSED_SRGB8_ETC2:
1426 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1427 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1428 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1429 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1430 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1431 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1432 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1433 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1434 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1435 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1436 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1437 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1438 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1439 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1440 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1441 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1442 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1443 return GL_TRUE;
1444 default:
1445 break;
1446 }
1447
1448 return GL_FALSE;
1449 }
1450
1451 /**
1452 * Convert various unpack formats to the corresponding base format.
1453 */
1454 GLenum
1455 _mesa_unpack_format_to_base_format(GLenum format)
1456 {
1457 switch(format) {
1458 case GL_RED_INTEGER:
1459 return GL_RED;
1460 case GL_GREEN_INTEGER:
1461 return GL_GREEN;
1462 case GL_BLUE_INTEGER:
1463 return GL_BLUE;
1464 case GL_ALPHA_INTEGER:
1465 return GL_ALPHA;
1466 case GL_RG_INTEGER:
1467 return GL_RG;
1468 case GL_RGB_INTEGER:
1469 return GL_RGB;
1470 case GL_RGBA_INTEGER:
1471 return GL_RGBA;
1472 case GL_BGR_INTEGER:
1473 return GL_BGR;
1474 case GL_BGRA_INTEGER:
1475 return GL_BGRA;
1476 case GL_LUMINANCE_INTEGER_EXT:
1477 return GL_LUMINANCE;
1478 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1479 return GL_LUMINANCE_ALPHA;
1480 case GL_RED:
1481 case GL_GREEN:
1482 case GL_BLUE:
1483 case GL_RG:
1484 case GL_RGB:
1485 case GL_RGBA:
1486 case GL_BGR:
1487 case GL_BGRA:
1488 case GL_ALPHA:
1489 case GL_LUMINANCE:
1490 case GL_LUMINANCE_ALPHA:
1491 default:
1492 return format;
1493 }
1494 }
1495
1496 /**
1497 * Convert various base formats to the corresponding integer format.
1498 */
1499 GLenum
1500 _mesa_base_format_to_integer_format(GLenum format)
1501 {
1502 switch(format) {
1503 case GL_RED:
1504 return GL_RED_INTEGER;
1505 case GL_GREEN:
1506 return GL_GREEN_INTEGER;
1507 case GL_BLUE:
1508 return GL_BLUE_INTEGER;
1509 case GL_RG:
1510 return GL_RG_INTEGER;
1511 case GL_RGB:
1512 return GL_RGB_INTEGER;
1513 case GL_RGBA:
1514 return GL_RGBA_INTEGER;
1515 case GL_BGR:
1516 return GL_BGR_INTEGER;
1517 case GL_BGRA:
1518 return GL_BGRA_INTEGER;
1519 case GL_ALPHA:
1520 return GL_ALPHA_INTEGER;
1521 case GL_LUMINANCE:
1522 return GL_LUMINANCE_INTEGER_EXT;
1523 case GL_LUMINANCE_ALPHA:
1524 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1525 }
1526
1527 return format;
1528 }
1529
1530
1531 /**
1532 * Does the given base texture/renderbuffer format have the channel
1533 * named by 'pname'?
1534 */
1535 GLboolean
1536 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1537 {
1538 switch (pname) {
1539 case GL_TEXTURE_RED_SIZE:
1540 case GL_TEXTURE_RED_TYPE:
1541 case GL_RENDERBUFFER_RED_SIZE_EXT:
1542 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1543 case GL_INTERNALFORMAT_RED_SIZE:
1544 case GL_INTERNALFORMAT_RED_TYPE:
1545 if (base_format == GL_RED ||
1546 base_format == GL_RG ||
1547 base_format == GL_RGB ||
1548 base_format == GL_RGBA) {
1549 return GL_TRUE;
1550 }
1551 return GL_FALSE;
1552 case GL_TEXTURE_GREEN_SIZE:
1553 case GL_TEXTURE_GREEN_TYPE:
1554 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1555 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1556 case GL_INTERNALFORMAT_GREEN_SIZE:
1557 case GL_INTERNALFORMAT_GREEN_TYPE:
1558 if (base_format == GL_RG ||
1559 base_format == GL_RGB ||
1560 base_format == GL_RGBA) {
1561 return GL_TRUE;
1562 }
1563 return GL_FALSE;
1564 case GL_TEXTURE_BLUE_SIZE:
1565 case GL_TEXTURE_BLUE_TYPE:
1566 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1567 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1568 case GL_INTERNALFORMAT_BLUE_SIZE:
1569 case GL_INTERNALFORMAT_BLUE_TYPE:
1570 if (base_format == GL_RGB ||
1571 base_format == GL_RGBA) {
1572 return GL_TRUE;
1573 }
1574 return GL_FALSE;
1575 case GL_TEXTURE_ALPHA_SIZE:
1576 case GL_TEXTURE_ALPHA_TYPE:
1577 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1578 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1579 case GL_INTERNALFORMAT_ALPHA_SIZE:
1580 case GL_INTERNALFORMAT_ALPHA_TYPE:
1581 if (base_format == GL_RGBA ||
1582 base_format == GL_ALPHA ||
1583 base_format == GL_LUMINANCE_ALPHA) {
1584 return GL_TRUE;
1585 }
1586 return GL_FALSE;
1587 case GL_TEXTURE_LUMINANCE_SIZE:
1588 case GL_TEXTURE_LUMINANCE_TYPE:
1589 if (base_format == GL_LUMINANCE ||
1590 base_format == GL_LUMINANCE_ALPHA) {
1591 return GL_TRUE;
1592 }
1593 return GL_FALSE;
1594 case GL_TEXTURE_INTENSITY_SIZE:
1595 case GL_TEXTURE_INTENSITY_TYPE:
1596 if (base_format == GL_INTENSITY) {
1597 return GL_TRUE;
1598 }
1599 return GL_FALSE;
1600 case GL_TEXTURE_DEPTH_SIZE:
1601 case GL_TEXTURE_DEPTH_TYPE:
1602 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1603 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1604 case GL_INTERNALFORMAT_DEPTH_SIZE:
1605 case GL_INTERNALFORMAT_DEPTH_TYPE:
1606 if (base_format == GL_DEPTH_STENCIL ||
1607 base_format == GL_DEPTH_COMPONENT) {
1608 return GL_TRUE;
1609 }
1610 return GL_FALSE;
1611 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1612 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1613 case GL_INTERNALFORMAT_STENCIL_SIZE:
1614 case GL_INTERNALFORMAT_STENCIL_TYPE:
1615 if (base_format == GL_DEPTH_STENCIL ||
1616 base_format == GL_STENCIL_INDEX) {
1617 return GL_TRUE;
1618 }
1619 return GL_FALSE;
1620 default:
1621 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1622 __func__, pname);
1623 return GL_FALSE;
1624 }
1625
1626 return GL_FALSE;
1627 }
1628
1629
1630 /**
1631 * If format is a generic compressed format, return the corresponding
1632 * non-compressed format. For other formats, return the format as-is.
1633 */
1634 GLenum
1635 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1636 {
1637 switch (format) {
1638 case GL_COMPRESSED_RED:
1639 return GL_RED;
1640 case GL_COMPRESSED_RG:
1641 return GL_RG;
1642 case GL_COMPRESSED_RGB:
1643 return GL_RGB;
1644 case GL_COMPRESSED_RGBA:
1645 return GL_RGBA;
1646 case GL_COMPRESSED_ALPHA:
1647 return GL_ALPHA;
1648 case GL_COMPRESSED_LUMINANCE:
1649 return GL_LUMINANCE;
1650 case GL_COMPRESSED_LUMINANCE_ALPHA:
1651 return GL_LUMINANCE_ALPHA;
1652 case GL_COMPRESSED_INTENSITY:
1653 return GL_INTENSITY;
1654 /* sRGB formats */
1655 case GL_COMPRESSED_SRGB:
1656 return GL_SRGB;
1657 case GL_COMPRESSED_SRGB_ALPHA:
1658 return GL_SRGB_ALPHA;
1659 case GL_COMPRESSED_SLUMINANCE:
1660 return GL_SLUMINANCE;
1661 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1662 return GL_SLUMINANCE_ALPHA;
1663 default:
1664 return format;
1665 }
1666 }
1667
1668
1669 /**
1670 * Return the equivalent non-generic internal format.
1671 * This is useful for comparing whether two internal formats are equivalent.
1672 */
1673 GLenum
1674 _mesa_get_nongeneric_internalformat(GLenum format)
1675 {
1676 switch (format) {
1677 /* GL 1.1 formats. */
1678 case 4:
1679 case GL_RGBA:
1680 return GL_RGBA8;
1681 case 3:
1682 case GL_RGB:
1683 return GL_RGB8;
1684 case 2:
1685 case GL_LUMINANCE_ALPHA:
1686 return GL_LUMINANCE8_ALPHA8;
1687 case 1:
1688 case GL_LUMINANCE:
1689 return GL_LUMINANCE8;
1690 case GL_ALPHA:
1691 return GL_ALPHA8;
1692 case GL_INTENSITY:
1693 return GL_INTENSITY8;
1694
1695 /* GL_ARB_texture_rg */
1696 case GL_RED:
1697 return GL_R8;
1698 case GL_RG:
1699 return GL_RG8;
1700
1701 /* GL_EXT_texture_sRGB */
1702 case GL_SRGB:
1703 return GL_SRGB8;
1704 case GL_SRGB_ALPHA:
1705 return GL_SRGB8_ALPHA8;
1706 case GL_SLUMINANCE:
1707 return GL_SLUMINANCE8;
1708 case GL_SLUMINANCE_ALPHA:
1709 return GL_SLUMINANCE8_ALPHA8;
1710
1711 /* GL_EXT_texture_snorm */
1712 case GL_RGBA_SNORM:
1713 return GL_RGBA8_SNORM;
1714 case GL_RGB_SNORM:
1715 return GL_RGB8_SNORM;
1716 case GL_RG_SNORM:
1717 return GL_RG8_SNORM;
1718 case GL_RED_SNORM:
1719 return GL_R8_SNORM;
1720 case GL_LUMINANCE_ALPHA_SNORM:
1721 return GL_LUMINANCE8_ALPHA8_SNORM;
1722 case GL_LUMINANCE_SNORM:
1723 return GL_LUMINANCE8_SNORM;
1724 case GL_ALPHA_SNORM:
1725 return GL_ALPHA8_SNORM;
1726 case GL_INTENSITY_SNORM:
1727 return GL_INTENSITY8_SNORM;
1728
1729 default:
1730 return format;
1731 }
1732 }
1733
1734
1735 /**
1736 * Convert an sRGB internal format to linear.
1737 */
1738 GLenum
1739 _mesa_get_linear_internalformat(GLenum format)
1740 {
1741 switch (format) {
1742 case GL_SRGB:
1743 return GL_RGB;
1744 case GL_SRGB_ALPHA:
1745 return GL_RGBA;
1746 case GL_SRGB8:
1747 return GL_RGB8;
1748 case GL_SRGB8_ALPHA8:
1749 return GL_RGBA8;
1750 case GL_SLUMINANCE8:
1751 return GL_LUMINANCE8;
1752 case GL_SLUMINANCE:
1753 return GL_LUMINANCE;
1754 case GL_SLUMINANCE_ALPHA:
1755 return GL_LUMINANCE_ALPHA;
1756 case GL_SLUMINANCE8_ALPHA8:
1757 return GL_LUMINANCE8_ALPHA8;
1758 default:
1759 return format;
1760 }
1761 }
1762
1763
1764 /**
1765 * Do error checking of format/type combinations for glReadPixels,
1766 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1767 * and type values, we may either generate GL_INVALID_OPERATION or
1768 * GL_INVALID_ENUM.
1769 *
1770 * \param format pixel format.
1771 * \param type pixel type.
1772 *
1773 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1774 */
1775 GLenum
1776 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1777 GLenum format, GLenum type)
1778 {
1779 /* From OpenGL 3.3 spec, page 220:
1780 * "If the format is DEPTH_STENCIL, then values are taken from
1781 * both the depth buffer and the stencil buffer. If there is no
1782 * depth buffer or if there is no stencil buffer, then the error
1783 * INVALID_OPERATION occurs. If the type parameter is not
1784 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1785 * error INVALID_ENUM occurs."
1786 *
1787 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1788 * cannot be used to read depth or stencil in that API.
1789 */
1790 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1791 && type != GL_UNSIGNED_INT_24_8
1792 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1793 return GL_INVALID_ENUM;
1794
1795 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1796 switch (type) {
1797 case GL_BITMAP:
1798 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1799 return GL_INVALID_ENUM;
1800 }
1801 break;
1802
1803 case GL_UNSIGNED_BYTE_3_3_2:
1804 case GL_UNSIGNED_BYTE_2_3_3_REV:
1805 case GL_UNSIGNED_SHORT_5_6_5:
1806 case GL_UNSIGNED_SHORT_5_6_5_REV:
1807 if (format == GL_RGB) {
1808 break; /* OK */
1809 }
1810 if (format == GL_RGB_INTEGER_EXT &&
1811 _mesa_has_texture_rgb10_a2ui(ctx)) {
1812 break; /* OK */
1813 }
1814 return GL_INVALID_OPERATION;
1815
1816 case GL_UNSIGNED_SHORT_4_4_4_4:
1817 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1818 case GL_UNSIGNED_INT_8_8_8_8:
1819 case GL_UNSIGNED_INT_8_8_8_8_REV:
1820 if (format == GL_RGBA ||
1821 format == GL_BGRA ||
1822 format == GL_ABGR_EXT) {
1823 break; /* OK */
1824 }
1825 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1826 _mesa_has_texture_rgb10_a2ui(ctx)) {
1827 break; /* OK */
1828 }
1829 return GL_INVALID_OPERATION;
1830
1831 case GL_UNSIGNED_SHORT_5_5_5_1:
1832 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1833 case GL_UNSIGNED_INT_10_10_10_2:
1834 case GL_UNSIGNED_INT_2_10_10_10_REV:
1835 if (format == GL_RGBA ||
1836 format == GL_BGRA) {
1837 break; /* OK */
1838 }
1839 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1840 _mesa_has_texture_rgb10_a2ui(ctx)) {
1841 break; /* OK */
1842 }
1843 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1844 ctx->API == API_OPENGLES2) {
1845 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1846 }
1847 return GL_INVALID_OPERATION;
1848
1849 case GL_UNSIGNED_INT_24_8:
1850 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1851 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1852 return GL_NO_ERROR;
1853
1854 if (format != GL_DEPTH_STENCIL) {
1855 return GL_INVALID_OPERATION;
1856 }
1857 return GL_NO_ERROR;
1858
1859 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1860 if (!_mesa_has_float_depth_buffer(ctx)) {
1861 return GL_INVALID_ENUM;
1862 }
1863 if (format != GL_DEPTH_STENCIL) {
1864 return GL_INVALID_OPERATION;
1865 }
1866 return GL_NO_ERROR;
1867
1868 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1869 if (!_mesa_has_packed_float(ctx)) {
1870 return GL_INVALID_ENUM;
1871 }
1872 if (format != GL_RGB) {
1873 return GL_INVALID_OPERATION;
1874 }
1875 return GL_NO_ERROR;
1876
1877 case GL_HALF_FLOAT_OES:
1878 switch (format) {
1879 case GL_RGBA:
1880 case GL_RGB:
1881 case GL_LUMINANCE_ALPHA:
1882 case GL_LUMINANCE:
1883 case GL_ALPHA:
1884 return GL_NO_ERROR;
1885 case GL_RG:
1886 case GL_RED:
1887 if (_mesa_has_rg_textures(ctx))
1888 return GL_NO_ERROR;
1889 /* fallthrough */
1890 default:
1891 return GL_INVALID_OPERATION;
1892 }
1893
1894 default:
1895 ; /* fall-through */
1896 }
1897
1898 /* now, for each format, check the type for compatibility */
1899 switch (format) {
1900 case GL_COLOR_INDEX:
1901 case GL_STENCIL_INDEX:
1902 switch (type) {
1903 case GL_BITMAP:
1904 case GL_BYTE:
1905 case GL_UNSIGNED_BYTE:
1906 case GL_SHORT:
1907 case GL_UNSIGNED_SHORT:
1908 case GL_INT:
1909 case GL_UNSIGNED_INT:
1910 case GL_FLOAT:
1911 case GL_HALF_FLOAT:
1912 return GL_NO_ERROR;
1913 default:
1914 return GL_INVALID_ENUM;
1915 }
1916
1917 case GL_RED:
1918 case GL_GREEN:
1919 case GL_BLUE:
1920 case GL_ALPHA:
1921 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1922 case GL_INTENSITY:
1923 #endif
1924 case GL_LUMINANCE:
1925 case GL_LUMINANCE_ALPHA:
1926 case GL_DEPTH_COMPONENT:
1927 switch (type) {
1928 case GL_BYTE:
1929 case GL_UNSIGNED_BYTE:
1930 case GL_SHORT:
1931 case GL_UNSIGNED_SHORT:
1932 case GL_INT:
1933 case GL_UNSIGNED_INT:
1934 case GL_FLOAT:
1935 case GL_HALF_FLOAT:
1936 return GL_NO_ERROR;
1937 default:
1938 return GL_INVALID_ENUM;
1939 }
1940
1941 case GL_RG:
1942 if (!_mesa_has_rg_textures(ctx))
1943 return GL_INVALID_ENUM;
1944 switch (type) {
1945 case GL_BYTE:
1946 case GL_UNSIGNED_BYTE:
1947 case GL_SHORT:
1948 case GL_UNSIGNED_SHORT:
1949 case GL_INT:
1950 case GL_UNSIGNED_INT:
1951 case GL_FLOAT:
1952 case GL_HALF_FLOAT:
1953 return GL_NO_ERROR;
1954 default:
1955 return GL_INVALID_ENUM;
1956 }
1957
1958 case GL_RGB:
1959 switch (type) {
1960 case GL_BYTE:
1961 case GL_UNSIGNED_BYTE:
1962 case GL_SHORT:
1963 case GL_UNSIGNED_SHORT:
1964 case GL_INT:
1965 case GL_UNSIGNED_INT:
1966 case GL_FLOAT:
1967 case GL_UNSIGNED_BYTE_3_3_2:
1968 case GL_UNSIGNED_BYTE_2_3_3_REV:
1969 case GL_UNSIGNED_SHORT_5_6_5:
1970 case GL_UNSIGNED_SHORT_5_6_5_REV:
1971 case GL_HALF_FLOAT:
1972 return GL_NO_ERROR;
1973 case GL_UNSIGNED_INT_2_10_10_10_REV:
1974 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1975 return (ctx->API == API_OPENGLES2)
1976 ? GL_NO_ERROR : GL_INVALID_ENUM;
1977 case GL_UNSIGNED_INT_5_9_9_9_REV:
1978 return _mesa_has_texture_shared_exponent(ctx)
1979 ? GL_NO_ERROR : GL_INVALID_ENUM;
1980 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1981 return _mesa_has_packed_float(ctx)
1982 ? GL_NO_ERROR : GL_INVALID_ENUM;
1983 default:
1984 return GL_INVALID_ENUM;
1985 }
1986
1987 case GL_BGR:
1988 switch (type) {
1989 /* NOTE: no packed types are supported with BGR. That's
1990 * intentional, according to the GL spec.
1991 */
1992 case GL_BYTE:
1993 case GL_UNSIGNED_BYTE:
1994 case GL_SHORT:
1995 case GL_UNSIGNED_SHORT:
1996 case GL_INT:
1997 case GL_UNSIGNED_INT:
1998 case GL_FLOAT:
1999 case GL_HALF_FLOAT:
2000 return GL_NO_ERROR;
2001 default:
2002 return GL_INVALID_ENUM;
2003 }
2004
2005 case GL_RGBA:
2006 case GL_BGRA:
2007 switch (type) {
2008 case GL_BYTE:
2009 case GL_UNSIGNED_BYTE:
2010 case GL_SHORT:
2011 case GL_UNSIGNED_SHORT:
2012 case GL_INT:
2013 case GL_UNSIGNED_INT:
2014 case GL_FLOAT:
2015 case GL_UNSIGNED_SHORT_4_4_4_4:
2016 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2017 case GL_UNSIGNED_SHORT_5_5_5_1:
2018 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2019 case GL_UNSIGNED_INT_8_8_8_8:
2020 case GL_UNSIGNED_INT_8_8_8_8_REV:
2021 case GL_UNSIGNED_INT_10_10_10_2:
2022 case GL_UNSIGNED_INT_2_10_10_10_REV:
2023 case GL_HALF_FLOAT:
2024 return GL_NO_ERROR;
2025 default:
2026 return GL_INVALID_ENUM;
2027 }
2028
2029 case GL_ABGR_EXT:
2030 switch (type) {
2031 case GL_BYTE:
2032 case GL_UNSIGNED_BYTE:
2033 case GL_SHORT:
2034 case GL_UNSIGNED_SHORT:
2035 case GL_INT:
2036 case GL_UNSIGNED_INT:
2037 case GL_FLOAT:
2038 case GL_UNSIGNED_SHORT_4_4_4_4:
2039 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2040 case GL_UNSIGNED_INT_8_8_8_8:
2041 case GL_UNSIGNED_INT_8_8_8_8_REV:
2042 case GL_HALF_FLOAT:
2043 return GL_NO_ERROR;
2044 default:
2045 return GL_INVALID_ENUM;
2046 }
2047
2048 case GL_YCBCR_MESA:
2049 if (!_mesa_has_MESA_ycbcr_texture(ctx))
2050 return GL_INVALID_ENUM;
2051 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2052 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2053 return GL_NO_ERROR;
2054 else
2055 return GL_INVALID_OPERATION;
2056
2057 case GL_DEPTH_STENCIL:
2058 if (type == GL_UNSIGNED_INT_24_8)
2059 return GL_NO_ERROR;
2060 else if (_mesa_has_float_depth_buffer(ctx) &&
2061 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2062 return GL_NO_ERROR;
2063 else
2064 return GL_INVALID_ENUM;
2065
2066 /* integer-valued formats */
2067 case GL_RED_INTEGER_EXT:
2068 case GL_GREEN_INTEGER_EXT:
2069 case GL_BLUE_INTEGER_EXT:
2070 case GL_ALPHA_INTEGER_EXT:
2071 case GL_RG_INTEGER:
2072 switch (type) {
2073 case GL_BYTE:
2074 case GL_UNSIGNED_BYTE:
2075 case GL_SHORT:
2076 case GL_UNSIGNED_SHORT:
2077 case GL_INT:
2078 case GL_UNSIGNED_INT:
2079 return _mesa_has_integer_textures(ctx)
2080 ? GL_NO_ERROR : GL_INVALID_ENUM;
2081 default:
2082 return GL_INVALID_ENUM;
2083 }
2084
2085 case GL_RGB_INTEGER_EXT:
2086 switch (type) {
2087 case GL_BYTE:
2088 case GL_UNSIGNED_BYTE:
2089 case GL_SHORT:
2090 case GL_UNSIGNED_SHORT:
2091 case GL_INT:
2092 case GL_UNSIGNED_INT:
2093 return _mesa_has_integer_textures(ctx)
2094 ? GL_NO_ERROR : GL_INVALID_ENUM;
2095 case GL_UNSIGNED_BYTE_3_3_2:
2096 case GL_UNSIGNED_BYTE_2_3_3_REV:
2097 case GL_UNSIGNED_SHORT_5_6_5:
2098 case GL_UNSIGNED_SHORT_5_6_5_REV:
2099 return _mesa_has_texture_rgb10_a2ui(ctx)
2100 ? GL_NO_ERROR : GL_INVALID_ENUM;
2101 default:
2102 return GL_INVALID_ENUM;
2103 }
2104
2105 case GL_BGR_INTEGER_EXT:
2106 switch (type) {
2107 case GL_BYTE:
2108 case GL_UNSIGNED_BYTE:
2109 case GL_SHORT:
2110 case GL_UNSIGNED_SHORT:
2111 case GL_INT:
2112 case GL_UNSIGNED_INT:
2113 /* NOTE: no packed formats w/ BGR format */
2114 return _mesa_has_integer_textures(ctx)
2115 ? GL_NO_ERROR : GL_INVALID_ENUM;
2116 default:
2117 return GL_INVALID_ENUM;
2118 }
2119
2120 case GL_RGBA_INTEGER_EXT:
2121 case GL_BGRA_INTEGER_EXT:
2122 switch (type) {
2123 case GL_BYTE:
2124 case GL_UNSIGNED_BYTE:
2125 case GL_SHORT:
2126 case GL_UNSIGNED_SHORT:
2127 case GL_INT:
2128 case GL_UNSIGNED_INT:
2129 return _mesa_has_integer_textures(ctx)
2130 ? GL_NO_ERROR : GL_INVALID_ENUM;
2131 case GL_UNSIGNED_SHORT_4_4_4_4:
2132 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2133 case GL_UNSIGNED_SHORT_5_5_5_1:
2134 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2135 case GL_UNSIGNED_INT_8_8_8_8:
2136 case GL_UNSIGNED_INT_8_8_8_8_REV:
2137 case GL_UNSIGNED_INT_10_10_10_2:
2138 case GL_UNSIGNED_INT_2_10_10_10_REV:
2139 return _mesa_has_texture_rgb10_a2ui(ctx)
2140 ? GL_NO_ERROR : GL_INVALID_ENUM;
2141 default:
2142 return GL_INVALID_ENUM;
2143 }
2144
2145 case GL_LUMINANCE_INTEGER_EXT:
2146 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2147 switch (type) {
2148 case GL_BYTE:
2149 case GL_UNSIGNED_BYTE:
2150 case GL_SHORT:
2151 case GL_UNSIGNED_SHORT:
2152 case GL_INT:
2153 case GL_UNSIGNED_INT:
2154 return _mesa_has_integer_textures(ctx)
2155 ? GL_NO_ERROR : GL_INVALID_ENUM;
2156 default:
2157 return GL_INVALID_ENUM;
2158 }
2159
2160 default:
2161 return GL_INVALID_ENUM;
2162 }
2163 return GL_NO_ERROR;
2164 }
2165
2166
2167 /**
2168 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2169 * and glTex[Sub]Image.
2170 * \return error code, or GL_NO_ERROR.
2171 */
2172 GLenum
2173 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2174 GLenum format, GLenum type,
2175 unsigned dimensions)
2176 {
2177 GLboolean type_valid = GL_TRUE;
2178
2179 switch (format) {
2180 case GL_RED:
2181 case GL_RG:
2182 if (!_mesa_has_rg_textures(ctx))
2183 return GL_INVALID_VALUE;
2184 /* fallthrough */
2185 case GL_ALPHA:
2186 case GL_LUMINANCE:
2187 case GL_LUMINANCE_ALPHA:
2188 type_valid = (type == GL_UNSIGNED_BYTE
2189 || type == GL_FLOAT
2190 || type == GL_HALF_FLOAT_OES);
2191 break;
2192
2193 case GL_RGB:
2194 type_valid = (type == GL_UNSIGNED_BYTE
2195 || type == GL_UNSIGNED_SHORT_5_6_5
2196 || type == GL_FLOAT
2197 || type == GL_HALF_FLOAT_OES);
2198 break;
2199
2200 case GL_RGBA:
2201 type_valid = (type == GL_UNSIGNED_BYTE
2202 || type == GL_UNSIGNED_SHORT_4_4_4_4
2203 || type == GL_UNSIGNED_SHORT_5_5_5_1
2204 || type == GL_FLOAT
2205 || type == GL_HALF_FLOAT_OES
2206 || (_mesa_has_texture_type_2_10_10_10_REV(ctx) &&
2207 type == GL_UNSIGNED_INT_2_10_10_10_REV));
2208 break;
2209
2210 case GL_DEPTH_COMPONENT:
2211 /* This format is filtered against invalid dimensionalities elsewhere.
2212 */
2213 type_valid = (type == GL_UNSIGNED_SHORT
2214 || type == GL_UNSIGNED_INT);
2215 break;
2216
2217 case GL_DEPTH_STENCIL:
2218 /* This format is filtered against invalid dimensionalities elsewhere.
2219 */
2220 type_valid = (type == GL_UNSIGNED_INT_24_8);
2221 break;
2222
2223 case GL_BGRA_EXT:
2224 type_valid = (type == GL_UNSIGNED_BYTE);
2225
2226 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2227 * the format does not appear to be allowed for 3D textures in OpenGL
2228 * ES.
2229 */
2230 if (dimensions != 2)
2231 return GL_INVALID_VALUE;
2232
2233 break;
2234
2235 default:
2236 return GL_INVALID_VALUE;
2237 }
2238
2239 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2240 }
2241
2242 /**
2243 * Return the simple base format for a given internal texture format.
2244 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2245 *
2246 * \param ctx GL context.
2247 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2248 *
2249 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2250 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2251 *
2252 * This is the format which is used during texture application (i.e. the
2253 * texture format and env mode determine the arithmetic used.
2254 */
2255 GLint
2256 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2257 {
2258 switch (internalFormat) {
2259 case GL_ALPHA:
2260 case GL_ALPHA4:
2261 case GL_ALPHA8:
2262 case GL_ALPHA12:
2263 case GL_ALPHA16:
2264 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2265 case 1:
2266 case GL_LUMINANCE:
2267 case GL_LUMINANCE4:
2268 case GL_LUMINANCE8:
2269 case GL_LUMINANCE12:
2270 case GL_LUMINANCE16:
2271 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2272 case 2:
2273 case GL_LUMINANCE_ALPHA:
2274 case GL_LUMINANCE4_ALPHA4:
2275 case GL_LUMINANCE6_ALPHA2:
2276 case GL_LUMINANCE8_ALPHA8:
2277 case GL_LUMINANCE12_ALPHA4:
2278 case GL_LUMINANCE12_ALPHA12:
2279 case GL_LUMINANCE16_ALPHA16:
2280 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2281 case GL_INTENSITY:
2282 case GL_INTENSITY4:
2283 case GL_INTENSITY8:
2284 case GL_INTENSITY12:
2285 case GL_INTENSITY16:
2286 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2287 case 3:
2288 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2289 case GL_RGB:
2290 case GL_R3_G3_B2:
2291 case GL_RGB4:
2292 case GL_RGB5:
2293 case GL_RGB8:
2294 case GL_RGB10:
2295 case GL_RGB12:
2296 case GL_RGB16:
2297 return GL_RGB;
2298 case 4:
2299 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2300 case GL_RGBA:
2301 case GL_RGBA2:
2302 case GL_RGBA4:
2303 case GL_RGB5_A1:
2304 case GL_RGBA8:
2305 case GL_RGB10_A2:
2306 case GL_RGBA12:
2307 case GL_RGBA16:
2308 return GL_RGBA;
2309 default:
2310 ; /* fallthrough */
2311 }
2312
2313 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2314 */
2315 if (_mesa_is_gles(ctx)) {
2316 switch (internalFormat) {
2317 case GL_BGRA:
2318 return GL_RGBA;
2319 default:
2320 ; /* fallthrough */
2321 }
2322 }
2323
2324 if (_mesa_has_ARB_ES2_compatibility(ctx) ||
2325 _mesa_has_OES_framebuffer_object(ctx) ||
2326 ctx->API == API_OPENGLES2) {
2327 switch (internalFormat) {
2328 case GL_RGB565:
2329 return GL_RGB;
2330 default:
2331 ; /* fallthrough */
2332 }
2333 }
2334
2335 if (_mesa_has_ARB_depth_texture(ctx) || _mesa_has_OES_depth_texture(ctx) ||
2336 ctx->API == API_OPENGL_CORE) {
2337 switch (internalFormat) {
2338 case GL_DEPTH_COMPONENT:
2339 case GL_DEPTH_COMPONENT16:
2340 case GL_DEPTH_COMPONENT24:
2341 case GL_DEPTH_COMPONENT32:
2342 return GL_DEPTH_COMPONENT;
2343 case GL_DEPTH_STENCIL:
2344 case GL_DEPTH24_STENCIL8:
2345 return GL_DEPTH_STENCIL;
2346 default:
2347 ; /* fallthrough */
2348 }
2349 }
2350
2351 if (_mesa_has_ARB_texture_stencil8(ctx) ||
2352 _mesa_has_OES_texture_stencil8(ctx)) {
2353 switch (internalFormat) {
2354 case GL_STENCIL_INDEX:
2355 case GL_STENCIL_INDEX1:
2356 case GL_STENCIL_INDEX4:
2357 case GL_STENCIL_INDEX8:
2358 case GL_STENCIL_INDEX16:
2359 return GL_STENCIL_INDEX;
2360 default:
2361 ; /* fallthrough */
2362 }
2363 }
2364
2365 switch (internalFormat) {
2366 case GL_COMPRESSED_ALPHA:
2367 return GL_ALPHA;
2368 case GL_COMPRESSED_LUMINANCE:
2369 return GL_LUMINANCE;
2370 case GL_COMPRESSED_LUMINANCE_ALPHA:
2371 return GL_LUMINANCE_ALPHA;
2372 case GL_COMPRESSED_INTENSITY:
2373 return GL_INTENSITY;
2374 case GL_COMPRESSED_RGB:
2375 return GL_RGB;
2376 case GL_COMPRESSED_RGBA:
2377 return GL_RGBA;
2378 default:
2379 ; /* fallthrough */
2380 }
2381
2382 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2383 GLenum base_compressed =
2384 _mesa_gl_compressed_format_base_format(internalFormat);
2385 if (base_compressed)
2386 return base_compressed;
2387 }
2388
2389 if ((_mesa_has_KHR_texture_compression_astc_ldr(ctx) &&
2390 is_astc_2d_format(internalFormat)) ||
2391 (_mesa_has_OES_texture_compression_astc(ctx) &&
2392 is_astc_3d_format(internalFormat)))
2393 return GL_RGBA;
2394
2395 if (_mesa_has_MESA_ycbcr_texture(ctx)) {
2396 if (internalFormat == GL_YCBCR_MESA)
2397 return GL_YCBCR_MESA;
2398 }
2399
2400 if (_mesa_has_half_float_textures(ctx)) {
2401 switch (internalFormat) {
2402 case GL_ALPHA16F_ARB:
2403 return GL_ALPHA;
2404 case GL_RGBA16F_ARB:
2405 return GL_RGBA;
2406 case GL_RGB16F_ARB:
2407 return GL_RGB;
2408 case GL_INTENSITY16F_ARB:
2409 return GL_INTENSITY;
2410 case GL_LUMINANCE16F_ARB:
2411 return GL_LUMINANCE;
2412 case GL_LUMINANCE_ALPHA16F_ARB:
2413 return GL_LUMINANCE_ALPHA;
2414 }
2415 }
2416
2417 if (_mesa_has_float_textures(ctx)) {
2418 switch (internalFormat) {
2419 case GL_ALPHA32F_ARB:
2420 return GL_ALPHA;
2421 case GL_RGBA32F_ARB:
2422 return GL_RGBA;
2423 case GL_RGB32F_ARB:
2424 return GL_RGB;
2425 case GL_INTENSITY32F_ARB:
2426 return GL_INTENSITY;
2427 case GL_LUMINANCE32F_ARB:
2428 return GL_LUMINANCE;
2429 case GL_LUMINANCE_ALPHA32F_ARB:
2430 return GL_LUMINANCE_ALPHA;
2431 }
2432 }
2433
2434 if (_mesa_has_EXT_texture_snorm(ctx) || _mesa_is_gles3(ctx)) {
2435 switch (internalFormat) {
2436 case GL_RED_SNORM:
2437 case GL_R8_SNORM:
2438 case GL_R16_SNORM:
2439 return GL_RED;
2440 case GL_RG_SNORM:
2441 case GL_RG8_SNORM:
2442 case GL_RG16_SNORM:
2443 return GL_RG;
2444 case GL_RGB_SNORM:
2445 case GL_RGB8_SNORM:
2446 case GL_RGB16_SNORM:
2447 return GL_RGB;
2448 case GL_RGBA_SNORM:
2449 case GL_RGBA8_SNORM:
2450 case GL_RGBA16_SNORM:
2451 return GL_RGBA;
2452 case GL_ALPHA_SNORM:
2453 case GL_ALPHA8_SNORM:
2454 case GL_ALPHA16_SNORM:
2455 return GL_ALPHA;
2456 case GL_LUMINANCE_SNORM:
2457 case GL_LUMINANCE8_SNORM:
2458 case GL_LUMINANCE16_SNORM:
2459 return GL_LUMINANCE;
2460 case GL_LUMINANCE_ALPHA_SNORM:
2461 case GL_LUMINANCE8_ALPHA8_SNORM:
2462 case GL_LUMINANCE16_ALPHA16_SNORM:
2463 return GL_LUMINANCE_ALPHA;
2464 case GL_INTENSITY_SNORM:
2465 case GL_INTENSITY8_SNORM:
2466 case GL_INTENSITY16_SNORM:
2467 return GL_INTENSITY;
2468 default:
2469 ; /* fallthrough */
2470 }
2471 }
2472
2473 if (_mesa_has_EXT_texture_sRGB(ctx) || _mesa_is_gles3(ctx)) {
2474 switch (internalFormat) {
2475 case GL_SRGB_EXT:
2476 case GL_SRGB8_EXT:
2477 case GL_COMPRESSED_SRGB_EXT:
2478 return GL_RGB;
2479 case GL_SRGB_ALPHA_EXT:
2480 case GL_SRGB8_ALPHA8_EXT:
2481 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2482 return GL_RGBA;
2483 case GL_SLUMINANCE_ALPHA_EXT:
2484 case GL_SLUMINANCE8_ALPHA8_EXT:
2485 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2486 return GL_LUMINANCE_ALPHA;
2487 case GL_SLUMINANCE_EXT:
2488 case GL_SLUMINANCE8_EXT:
2489 case GL_COMPRESSED_SLUMINANCE_EXT:
2490 return GL_LUMINANCE;
2491 default:
2492 ; /* fallthrough */
2493 }
2494 }
2495
2496 if (_mesa_has_EXT_texture_sRGB_R8(ctx)) {
2497 switch (internalFormat) {
2498 case GL_SR8_EXT:
2499 return GL_RED;
2500 default:
2501 ; /* fallthrough */
2502 }
2503 }
2504
2505 if (_mesa_has_integer_textures(ctx)) {
2506 switch (internalFormat) {
2507 case GL_RGBA8UI_EXT:
2508 case GL_RGBA16UI_EXT:
2509 case GL_RGBA32UI_EXT:
2510 case GL_RGBA8I_EXT:
2511 case GL_RGBA16I_EXT:
2512 case GL_RGBA32I_EXT:
2513 return GL_RGBA;
2514 case GL_RGB8UI_EXT:
2515 case GL_RGB16UI_EXT:
2516 case GL_RGB32UI_EXT:
2517 case GL_RGB8I_EXT:
2518 case GL_RGB16I_EXT:
2519 case GL_RGB32I_EXT:
2520 return GL_RGB;
2521 }
2522 }
2523
2524 if (_mesa_has_texture_rgb10_a2ui(ctx)) {
2525 switch (internalFormat) {
2526 case GL_RGB10_A2UI:
2527 return GL_RGBA;
2528 }
2529 }
2530
2531 if (_mesa_has_integer_textures(ctx)) {
2532 switch (internalFormat) {
2533 case GL_ALPHA8UI_EXT:
2534 case GL_ALPHA16UI_EXT:
2535 case GL_ALPHA32UI_EXT:
2536 case GL_ALPHA8I_EXT:
2537 case GL_ALPHA16I_EXT:
2538 case GL_ALPHA32I_EXT:
2539 return GL_ALPHA;
2540 case GL_INTENSITY8UI_EXT:
2541 case GL_INTENSITY16UI_EXT:
2542 case GL_INTENSITY32UI_EXT:
2543 case GL_INTENSITY8I_EXT:
2544 case GL_INTENSITY16I_EXT:
2545 case GL_INTENSITY32I_EXT:
2546 return GL_INTENSITY;
2547 case GL_LUMINANCE8UI_EXT:
2548 case GL_LUMINANCE16UI_EXT:
2549 case GL_LUMINANCE32UI_EXT:
2550 case GL_LUMINANCE8I_EXT:
2551 case GL_LUMINANCE16I_EXT:
2552 case GL_LUMINANCE32I_EXT:
2553 return GL_LUMINANCE;
2554 case GL_LUMINANCE_ALPHA8UI_EXT:
2555 case GL_LUMINANCE_ALPHA16UI_EXT:
2556 case GL_LUMINANCE_ALPHA32UI_EXT:
2557 case GL_LUMINANCE_ALPHA8I_EXT:
2558 case GL_LUMINANCE_ALPHA16I_EXT:
2559 case GL_LUMINANCE_ALPHA32I_EXT:
2560 return GL_LUMINANCE_ALPHA;
2561 default:
2562 ; /* fallthrough */
2563 }
2564 }
2565
2566 if (_mesa_has_rg_textures(ctx)) {
2567 switch (internalFormat) {
2568 case GL_R16F:
2569 if (!_mesa_has_half_float_textures(ctx))
2570 break;
2571 return GL_RED;
2572 case GL_R32F:
2573 if (!_mesa_has_float_textures(ctx))
2574 break;
2575 return GL_RED;
2576 case GL_R8I:
2577 case GL_R8UI:
2578 case GL_R16I:
2579 case GL_R16UI:
2580 case GL_R32I:
2581 case GL_R32UI:
2582 if (!_mesa_has_integer_textures(ctx))
2583 break;
2584 /* FALLTHROUGH */
2585 case GL_R8:
2586 case GL_R16:
2587 case GL_RED:
2588 case GL_COMPRESSED_RED:
2589 return GL_RED;
2590
2591 case GL_RG16F:
2592 if (!_mesa_has_half_float_textures(ctx))
2593 break;
2594 return GL_RG;
2595 case GL_RG32F:
2596 if (!_mesa_has_float_textures(ctx))
2597 break;
2598 return GL_RG;
2599 case GL_RG8I:
2600 case GL_RG8UI:
2601 case GL_RG16I:
2602 case GL_RG16UI:
2603 case GL_RG32I:
2604 case GL_RG32UI:
2605 if (!_mesa_has_integer_textures(ctx))
2606 break;
2607 /* FALLTHROUGH */
2608 case GL_RG:
2609 case GL_RG8:
2610 case GL_RG16:
2611 case GL_COMPRESSED_RG:
2612 return GL_RG;
2613 default:
2614 ; /* fallthrough */
2615 }
2616 }
2617
2618 if (_mesa_has_texture_shared_exponent(ctx)) {
2619 switch (internalFormat) {
2620 case GL_RGB9_E5_EXT:
2621 return GL_RGB;
2622 default:
2623 ; /* fallthrough */
2624 }
2625 }
2626
2627 if (_mesa_has_packed_float(ctx)) {
2628 switch (internalFormat) {
2629 case GL_R11F_G11F_B10F_EXT:
2630 return GL_RGB;
2631 default:
2632 ; /* fallthrough */
2633 }
2634 }
2635
2636 if (_mesa_has_float_depth_buffer(ctx)) {
2637 switch (internalFormat) {
2638 case GL_DEPTH_COMPONENT32F:
2639 return GL_DEPTH_COMPONENT;
2640 case GL_DEPTH32F_STENCIL8:
2641 return GL_DEPTH_STENCIL;
2642 default:
2643 ; /* fallthrough */
2644 }
2645 }
2646
2647 return -1; /* error */
2648 }
2649
2650 /**
2651 * Returns the effective internal format from a texture format and type.
2652 * This is used by texture image operations internally for validation, when
2653 * the specified internal format is a base (unsized) format.
2654 *
2655 * This method will only return a valid effective internal format if the
2656 * combination of format, type and internal format in base form, is acceptable.
2657 *
2658 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2659 * in extensions, to unambiguously correspond to the given base format, then
2660 * that internal format is returned as the effective. Otherwise, if the
2661 * combination is accepted but a single effective format is not defined, the
2662 * passed base format will be returned instead.
2663 *
2664 * \param format the texture format
2665 * \param type the texture type
2666 */
2667 static GLenum
2668 gles_effective_internal_format_for_format_and_type(GLenum format,
2669 GLenum type)
2670 {
2671 switch (type) {
2672 case GL_UNSIGNED_BYTE:
2673 switch (format) {
2674 case GL_RGBA:
2675 return GL_RGBA8;
2676 case GL_RGB:
2677 return GL_RGB8;
2678 case GL_RG:
2679 return GL_RG8;
2680 case GL_RED:
2681 return GL_R8;
2682 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2683 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2684 * internal formats, they do not correspond to GL constants, so the base
2685 * format is returned instead.
2686 */
2687 case GL_BGRA_EXT:
2688 case GL_LUMINANCE_ALPHA:
2689 case GL_LUMINANCE:
2690 case GL_ALPHA:
2691 return format;
2692 }
2693 break;
2694
2695 case GL_UNSIGNED_SHORT_4_4_4_4:
2696 if (format == GL_RGBA)
2697 return GL_RGBA4;
2698 break;
2699
2700 case GL_UNSIGNED_SHORT_5_5_5_1:
2701 if (format == GL_RGBA)
2702 return GL_RGB5_A1;
2703 break;
2704
2705 case GL_UNSIGNED_SHORT_5_6_5:
2706 if (format == GL_RGB)
2707 return GL_RGB565;
2708 break;
2709
2710 /* OES_packed_depth_stencil */
2711 case GL_UNSIGNED_INT_24_8:
2712 if (format == GL_DEPTH_STENCIL)
2713 return GL_DEPTH24_STENCIL8;
2714 break;
2715
2716 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2717 if (format == GL_DEPTH_STENCIL)
2718 return GL_DEPTH32F_STENCIL8;
2719 break;
2720
2721 case GL_UNSIGNED_SHORT:
2722 if (format == GL_DEPTH_COMPONENT)
2723 return GL_DEPTH_COMPONENT16;
2724 break;
2725
2726 case GL_UNSIGNED_INT:
2727 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2728 * the format.
2729 */
2730 if (format == GL_DEPTH_COMPONENT)
2731 return format;
2732 break;
2733
2734 /* OES_texture_float and OES_texture_half_float */
2735 case GL_FLOAT:
2736 if (format == GL_DEPTH_COMPONENT)
2737 return GL_DEPTH_COMPONENT32F;
2738 /* fall through */
2739 case GL_HALF_FLOAT_OES:
2740 switch (format) {
2741 case GL_RGBA:
2742 case GL_RGB:
2743 case GL_LUMINANCE_ALPHA:
2744 case GL_LUMINANCE:
2745 case GL_ALPHA:
2746 case GL_RED:
2747 case GL_RG:
2748 return format;
2749 }
2750 break;
2751 case GL_HALF_FLOAT:
2752 switch (format) {
2753 case GL_RG:
2754 case GL_RED:
2755 return format;
2756 }
2757 break;
2758
2759 /* GL_EXT_texture_type_2_10_10_10_REV */
2760 case GL_UNSIGNED_INT_2_10_10_10_REV:
2761 switch (format) {
2762 case GL_RGBA:
2763 case GL_RGB:
2764 return format;
2765 }
2766 break;
2767
2768 default:
2769 /* fall through and return NONE */
2770 break;
2771 }
2772
2773 return GL_NONE;
2774 }
2775
2776 /**
2777 * Do error checking of format/type combinations for OpenGL ES 3
2778 * glTex[Sub]Image, or ES1/ES2 with GL_OES_required_internalformat.
2779 * \return error code, or GL_NO_ERROR.
2780 */
2781 GLenum
2782 _mesa_gles_error_check_format_and_type(const struct gl_context *ctx,
2783 GLenum format, GLenum type,
2784 GLenum internalFormat)
2785 {
2786 /* If internalFormat is an unsized format, then the effective internal
2787 * format derived from format and type should be used instead. Page 127,
2788 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2789 *
2790 * "if internalformat is a base internal format, the effective
2791 * internal format is a sized internal format that is derived
2792 * from the format and type for internal use by the GL.
2793 * Table 3.12 specifies the mapping of format and type to effective
2794 * internal formats. The effective internal format is used by the GL
2795 * for purposes such as texture completeness or type checks for
2796 * CopyTex* commands. In these cases, the GL is required to operate
2797 * as if the effective internal format was used as the internalformat
2798 * when specifying the texture data."
2799 */
2800 if (_mesa_is_enum_format_unsized(internalFormat)) {
2801 GLenum effectiveInternalFormat =
2802 gles_effective_internal_format_for_format_and_type(format, type);
2803
2804 if (effectiveInternalFormat == GL_NONE)
2805 return GL_INVALID_OPERATION;
2806
2807 GLenum baseInternalFormat;
2808 if (internalFormat == GL_BGRA_EXT) {
2809 /* Unfortunately, _mesa_base_tex_format returns a base format of
2810 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2811 * asking the question, "what channels does this format have?"
2812 * However, if we're trying to determine if two internal formats
2813 * match in the ES3 sense, we actually want GL_BGRA.
2814 */
2815 baseInternalFormat = GL_BGRA_EXT;
2816 } else {
2817 baseInternalFormat =
2818 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2819 }
2820
2821 if (internalFormat != baseInternalFormat)
2822 return GL_INVALID_OPERATION;
2823
2824 internalFormat = effectiveInternalFormat;
2825 }
2826
2827 /* The GLES variant of EXT_texture_compression_s3tc is very vague and
2828 * doesn't list valid types. Just do exactly what the spec says.
2829 */
2830 if (_mesa_has_EXT_texture_compression_s3tc(ctx) &&
2831 (internalFormat == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||
2832 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ||
2833 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT3_EXT ||
2834 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT5_EXT))
2835 return format == GL_RGB || format == GL_RGBA ? GL_NO_ERROR :
2836 GL_INVALID_OPERATION;
2837
2838 switch (format) {
2839 case GL_BGRA_EXT:
2840 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2841 return GL_INVALID_OPERATION;
2842 break;
2843
2844 case GL_RGBA:
2845 switch (type) {
2846 case GL_UNSIGNED_BYTE:
2847 switch (internalFormat) {
2848 case GL_RGBA:
2849 case GL_RGBA8:
2850 case GL_RGB5_A1:
2851 case GL_RGBA4:
2852 break;
2853 case GL_SRGB8_ALPHA8_EXT:
2854 if (ctx->Version <= 20)
2855 return GL_INVALID_OPERATION;
2856 break;
2857 case GL_COMPRESSED_RGBA_BPTC_UNORM:
2858 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
2859 if (!_mesa_has_EXT_texture_compression_bptc(ctx))
2860 return GL_INVALID_OPERATION;
2861 break;
2862 default:
2863 return GL_INVALID_OPERATION;
2864 }
2865 break;
2866
2867 case GL_BYTE:
2868 if (ctx->Version <= 20 || internalFormat != GL_RGBA8_SNORM)
2869 return GL_INVALID_OPERATION;
2870 break;
2871
2872 case GL_UNSIGNED_SHORT:
2873 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGBA16)
2874 return GL_INVALID_OPERATION;
2875 break;
2876
2877 case GL_SHORT:
2878 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2879 internalFormat != GL_RGBA16_SNORM)
2880 return GL_INVALID_OPERATION;
2881 break;
2882
2883 case GL_UNSIGNED_SHORT_4_4_4_4:
2884 switch (internalFormat) {
2885 case GL_RGBA:
2886 case GL_RGBA4:
2887 break;
2888 default:
2889 return GL_INVALID_OPERATION;
2890 }
2891 break;
2892
2893 case GL_UNSIGNED_SHORT_5_5_5_1:
2894 switch (internalFormat) {
2895 case GL_RGBA:
2896 case GL_RGB5_A1:
2897 break;
2898 default:
2899 return GL_INVALID_OPERATION;
2900 }
2901 break;
2902
2903 case GL_UNSIGNED_INT_2_10_10_10_REV:
2904 switch (internalFormat) {
2905 case GL_RGBA:
2906 case GL_RGB10_A2:
2907 case GL_RGB5_A1:
2908 if (!_mesa_has_texture_type_2_10_10_10_REV(ctx))
2909 return GL_INVALID_OPERATION;
2910 break;
2911 default:
2912 return GL_INVALID_OPERATION;
2913 }
2914 break;
2915
2916 case GL_HALF_FLOAT:
2917 if (ctx->Version <= 20 || internalFormat != GL_RGBA16F)
2918 return GL_INVALID_OPERATION;
2919 break;
2920
2921 case GL_FLOAT:
2922 switch (internalFormat) {
2923 case GL_RGBA16F:
2924 case GL_RGBA32F:
2925 if (ctx->Version <= 20)
2926 return GL_INVALID_OPERATION;
2927 break;
2928 case GL_RGBA:
2929 if (_mesa_has_OES_texture_float(ctx) && internalFormat == format)
2930 break;
2931 /* fallthrough */
2932 default:
2933 return GL_INVALID_OPERATION;
2934 }
2935 break;
2936
2937 case GL_HALF_FLOAT_OES:
2938 if (_mesa_has_OES_texture_half_float(ctx) && internalFormat == format)
2939 break;
2940 /* fallthrough */
2941 default:
2942 return GL_INVALID_OPERATION;
2943 }
2944 break;
2945
2946 case GL_RGBA_INTEGER:
2947 if (ctx->Version <= 20)
2948 return GL_INVALID_OPERATION;
2949 switch (type) {
2950 case GL_UNSIGNED_BYTE:
2951 if (internalFormat != GL_RGBA8UI)
2952 return GL_INVALID_OPERATION;
2953 break;
2954
2955 case GL_BYTE:
2956 if (internalFormat != GL_RGBA8I)
2957 return GL_INVALID_OPERATION;
2958 break;
2959
2960 case GL_UNSIGNED_SHORT:
2961 if (internalFormat != GL_RGBA16UI)
2962 return GL_INVALID_OPERATION;
2963 break;
2964
2965 case GL_SHORT:
2966 if (internalFormat != GL_RGBA16I)
2967 return GL_INVALID_OPERATION;
2968 break;
2969
2970 case GL_UNSIGNED_INT:
2971 if (internalFormat != GL_RGBA32UI)
2972 return GL_INVALID_OPERATION;
2973 break;
2974
2975 case GL_INT:
2976 if (internalFormat != GL_RGBA32I)
2977 return GL_INVALID_OPERATION;
2978 break;
2979
2980 case GL_UNSIGNED_INT_2_10_10_10_REV:
2981 if (internalFormat != GL_RGB10_A2UI)
2982 return GL_INVALID_OPERATION;
2983 break;
2984
2985 default:
2986 return GL_INVALID_OPERATION;
2987 }
2988 break;
2989
2990 case GL_RGB:
2991 switch (type) {
2992 case GL_UNSIGNED_BYTE:
2993 switch (internalFormat) {
2994 case GL_RGB:
2995 case GL_RGB8:
2996 case GL_RGB565:
2997 break;
2998 case GL_SRGB8:
2999 if (ctx->Version <= 20)
3000 return GL_INVALID_OPERATION;
3001 break;
3002 default:
3003 return GL_INVALID_OPERATION;
3004 }
3005 break;
3006
3007 case GL_BYTE:
3008 if (ctx->Version <= 20 || internalFormat != GL_RGB8_SNORM)
3009 return GL_INVALID_OPERATION;
3010 break;
3011
3012 case GL_UNSIGNED_SHORT:
3013 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGB16)
3014 return GL_INVALID_OPERATION;
3015 break;
3016
3017 case GL_SHORT:
3018 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3019 internalFormat != GL_RGB16_SNORM)
3020 return GL_INVALID_OPERATION;
3021 break;
3022
3023 case GL_UNSIGNED_SHORT_5_6_5:
3024 switch (internalFormat) {
3025 case GL_RGB:
3026 case GL_RGB565:
3027 break;
3028 default:
3029 return GL_INVALID_OPERATION;
3030 }
3031 break;
3032
3033 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3034 if (ctx->Version <= 20 || internalFormat != GL_R11F_G11F_B10F)
3035 return GL_INVALID_OPERATION;
3036 break;
3037
3038 case GL_UNSIGNED_INT_5_9_9_9_REV:
3039 if (ctx->Version <= 20 || internalFormat != GL_RGB9_E5)
3040 return GL_INVALID_OPERATION;
3041 break;
3042
3043 case GL_HALF_FLOAT:
3044 if (ctx->Version <= 20)
3045 return GL_INVALID_OPERATION;
3046 switch (internalFormat) {
3047 case GL_RGB16F:
3048 case GL_R11F_G11F_B10F:
3049 case GL_RGB9_E5:
3050 break;
3051 default:
3052 return GL_INVALID_OPERATION;
3053 }
3054 break;
3055
3056 case GL_FLOAT:
3057 switch (internalFormat) {
3058 case GL_RGB16F:
3059 case GL_RGB32F:
3060 case GL_R11F_G11F_B10F:
3061 case GL_RGB9_E5:
3062 if (ctx->Version <= 20)
3063 return GL_INVALID_OPERATION;
3064 break;
3065 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
3066 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
3067 if (!_mesa_has_EXT_texture_compression_bptc(ctx))
3068 return GL_INVALID_OPERATION;
3069 break;
3070 case GL_RGB:
3071 if (_mesa_has_OES_texture_float(ctx) && internalFormat == format)
3072 break;
3073 /* fallthrough */
3074 default:
3075 return GL_INVALID_OPERATION;
3076 }
3077 break;
3078
3079 case GL_HALF_FLOAT_OES:
3080 if (!_mesa_has_OES_texture_half_float(ctx) || internalFormat != format)
3081 return GL_INVALID_OPERATION;
3082 break;
3083
3084 case GL_UNSIGNED_INT_2_10_10_10_REV:
3085 switch (internalFormat) {
3086 case GL_RGB:
3087 case GL_RGB10:
3088 case GL_RGB8:
3089 case GL_RGB565:
3090 /* GL_EXT_texture_type_2_10_10_10_REV allows GL_RGB even though
3091 * GLES3 doesn't, and GL_OES_required_internalformat extends that
3092 * to allow the sized RGB internalformats as well.
3093 */
3094 if (!_mesa_has_texture_type_2_10_10_10_REV(ctx))
3095 return GL_INVALID_OPERATION;
3096 break;
3097 default:
3098 return GL_INVALID_OPERATION;
3099 }
3100 break;
3101
3102 default:
3103 return GL_INVALID_OPERATION;
3104 }
3105 break;
3106
3107 case GL_RGB_INTEGER:
3108 if (ctx->Version <= 20)
3109 return GL_INVALID_OPERATION;
3110 switch (type) {
3111 case GL_UNSIGNED_BYTE:
3112 if (internalFormat != GL_RGB8UI)
3113 return GL_INVALID_OPERATION;
3114 break;
3115
3116 case GL_BYTE:
3117 if (internalFormat != GL_RGB8I)
3118 return GL_INVALID_OPERATION;
3119 break;
3120
3121 case GL_UNSIGNED_SHORT:
3122 if (internalFormat != GL_RGB16UI)
3123 return GL_INVALID_OPERATION;
3124 break;
3125
3126 case GL_SHORT:
3127 if (internalFormat != GL_RGB16I)
3128 return GL_INVALID_OPERATION;
3129 break;
3130
3131 case GL_UNSIGNED_INT:
3132 if (internalFormat != GL_RGB32UI)
3133 return GL_INVALID_OPERATION;
3134 break;
3135
3136 case GL_INT:
3137 if (internalFormat != GL_RGB32I)
3138 return GL_INVALID_OPERATION;
3139 break;
3140
3141 default:
3142 return GL_INVALID_OPERATION;
3143 }
3144 break;
3145
3146 case GL_RG:
3147 if (!_mesa_has_rg_textures(ctx))
3148 return GL_INVALID_OPERATION;
3149 switch (type) {
3150 case GL_UNSIGNED_BYTE:
3151 if (internalFormat != GL_RG8 &&
3152 (!_mesa_has_EXT_texture_compression_rgtc(ctx) ||
3153 internalFormat != GL_COMPRESSED_RED_GREEN_RGTC2_EXT))
3154 return GL_INVALID_OPERATION;
3155 break;
3156
3157 case GL_BYTE:
3158 if (internalFormat != GL_RG8_SNORM &&
3159 (!_mesa_has_EXT_texture_compression_rgtc(ctx) ||
3160 internalFormat != GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT))
3161 return GL_INVALID_OPERATION;
3162 break;
3163
3164 case GL_UNSIGNED_SHORT:
3165 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RG16)
3166 return GL_INVALID_OPERATION;
3167 break;
3168
3169 case GL_SHORT:
3170 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3171 internalFormat != GL_RG16_SNORM)
3172 return GL_INVALID_OPERATION;
3173 break;
3174
3175 case GL_HALF_FLOAT:
3176 case GL_HALF_FLOAT_OES:
3177 switch (internalFormat) {
3178 case GL_RG16F:
3179 if (ctx->Version <= 20)
3180 return GL_INVALID_OPERATION;
3181 break;
3182 case GL_RG:
3183 if (_mesa_has_rg_textures(ctx) &&
3184 _mesa_has_OES_texture_half_float(ctx))
3185 break;
3186 /* fallthrough */
3187 default:
3188 return GL_INVALID_OPERATION;
3189 }
3190 break;
3191
3192 case GL_FLOAT:
3193 switch (internalFormat) {
3194 case GL_RG16F:
3195 case GL_RG32F:
3196 break;
3197 case GL_RG:
3198 if (_mesa_has_rg_textures(ctx) &&
3199 _mesa_has_OES_texture_float(ctx))
3200 break;
3201 /* fallthrough */
3202 default:
3203 return GL_INVALID_OPERATION;
3204 }
3205 break;
3206
3207 default:
3208 return GL_INVALID_OPERATION;
3209 }
3210 break;
3211
3212 case GL_RG_INTEGER:
3213 if (ctx->Version <= 20)
3214 return GL_INVALID_OPERATION;
3215 switch (type) {
3216 case GL_UNSIGNED_BYTE:
3217 if (internalFormat != GL_RG8UI)
3218 return GL_INVALID_OPERATION;
3219 break;
3220
3221 case GL_BYTE:
3222 if (internalFormat != GL_RG8I)
3223 return GL_INVALID_OPERATION;
3224 break;
3225
3226 case GL_UNSIGNED_SHORT:
3227 if (internalFormat != GL_RG16UI)
3228 return GL_INVALID_OPERATION;
3229 break;
3230
3231 case GL_SHORT:
3232 if (internalFormat != GL_RG16I)
3233 return GL_INVALID_OPERATION;
3234 break;
3235
3236 case GL_UNSIGNED_INT:
3237 if (internalFormat != GL_RG32UI)
3238 return GL_INVALID_OPERATION;
3239 break;
3240
3241 case GL_INT:
3242 if (internalFormat != GL_RG32I)
3243 return GL_INVALID_OPERATION;
3244 break;
3245
3246 default:
3247 return GL_INVALID_OPERATION;
3248 }
3249 break;
3250
3251 case GL_RED:
3252 if (!_mesa_has_rg_textures(ctx))
3253 return GL_INVALID_OPERATION;
3254 switch (type) {
3255 case GL_UNSIGNED_BYTE:
3256 if (internalFormat == GL_R8 ||
3257 ((internalFormat == GL_SR8_EXT) &&
3258 _mesa_has_EXT_texture_sRGB_R8(ctx)) ||
3259 (internalFormat == GL_COMPRESSED_RED_RGTC1_EXT &&
3260 _mesa_has_EXT_texture_compression_rgtc(ctx)))
3261 break;
3262 return GL_INVALID_OPERATION;
3263
3264 case GL_BYTE:
3265 if (internalFormat != GL_R8_SNORM &&
3266 (!_mesa_has_EXT_texture_compression_rgtc(ctx) ||
3267 internalFormat != GL_COMPRESSED_SIGNED_RED_RGTC1_EXT))
3268 return GL_INVALID_OPERATION;
3269 break;
3270
3271 case GL_UNSIGNED_SHORT:
3272 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_R16)
3273 return GL_INVALID_OPERATION;
3274 break;
3275
3276 case GL_SHORT:
3277 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3278 internalFormat != GL_R16_SNORM)
3279 return GL_INVALID_OPERATION;
3280 break;
3281
3282 case GL_HALF_FLOAT:
3283 case GL_HALF_FLOAT_OES:
3284 switch (internalFormat) {
3285 case GL_R16F:
3286 if (ctx->Version <= 20)
3287 return GL_INVALID_OPERATION;
3288 break;
3289 case GL_RG:
3290 case GL_RED:
3291 if (_mesa_has_rg_textures(ctx) &&
3292 _mesa_has_OES_texture_half_float(ctx))
3293 break;
3294 /* fallthrough */
3295 default:
3296 return GL_INVALID_OPERATION;
3297 }
3298 break;
3299
3300 case GL_FLOAT:
3301 switch (internalFormat) {
3302 case GL_R16F:
3303 case GL_R32F:
3304 break;
3305 case GL_RED:
3306 if (_mesa_has_rg_textures(ctx) &&
3307 _mesa_has_OES_texture_float(ctx))
3308 break;
3309 /* fallthrough */
3310 default:
3311 return GL_INVALID_OPERATION;
3312 }
3313 break;
3314
3315 default:
3316 return GL_INVALID_OPERATION;
3317 }
3318 break;
3319
3320 case GL_RED_INTEGER:
3321 if (ctx->Version <= 20)
3322 return GL_INVALID_OPERATION;
3323 switch (type) {
3324 case GL_UNSIGNED_BYTE:
3325 if (internalFormat != GL_R8UI)
3326 return GL_INVALID_OPERATION;
3327 break;
3328
3329 case GL_BYTE:
3330 if (internalFormat != GL_R8I)
3331 return GL_INVALID_OPERATION;
3332 break;
3333
3334 case GL_UNSIGNED_SHORT:
3335 if (internalFormat != GL_R16UI)
3336 return GL_INVALID_OPERATION;
3337 break;
3338
3339 case GL_SHORT:
3340 if (internalFormat != GL_R16I)
3341 return GL_INVALID_OPERATION;
3342 break;
3343
3344 case GL_UNSIGNED_INT:
3345 if (internalFormat != GL_R32UI)
3346 return GL_INVALID_OPERATION;
3347 break;
3348
3349 case GL_INT:
3350 if (internalFormat != GL_R32I)
3351 return GL_INVALID_OPERATION;
3352 break;
3353
3354 default:
3355 return GL_INVALID_OPERATION;
3356 }
3357 break;
3358
3359 case GL_DEPTH_COMPONENT:
3360 switch (type) {
3361 case GL_UNSIGNED_SHORT:
3362 if (internalFormat != GL_DEPTH_COMPONENT
3363 && internalFormat != GL_DEPTH_COMPONENT16)
3364 return GL_INVALID_OPERATION;
3365 break;
3366
3367 case GL_UNSIGNED_INT:
3368 switch (internalFormat) {
3369 case GL_DEPTH_COMPONENT:
3370 case GL_DEPTH_COMPONENT16:
3371 case GL_DEPTH_COMPONENT24:
3372 break;
3373 default:
3374 return GL_INVALID_OPERATION;
3375 }
3376 break;
3377
3378 case GL_FLOAT:
3379 if (ctx->Version <= 20 || internalFormat != GL_DEPTH_COMPONENT32F)
3380 return GL_INVALID_OPERATION;
3381 break;
3382
3383 default:
3384 return GL_INVALID_OPERATION;
3385 }
3386 break;
3387
3388 case GL_DEPTH_STENCIL:
3389 switch (type) {
3390 case GL_UNSIGNED_INT_24_8:
3391 if (internalFormat != GL_DEPTH_STENCIL
3392 && internalFormat != GL_DEPTH24_STENCIL8)
3393 return GL_INVALID_OPERATION;
3394 break;
3395
3396 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3397 if (ctx->Version <= 20 || internalFormat != GL_DEPTH32F_STENCIL8)
3398 return GL_INVALID_OPERATION;
3399 break;
3400
3401 default:
3402 return GL_INVALID_OPERATION;
3403 }
3404 break;
3405
3406 case GL_STENCIL_INDEX:
3407 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3408 type != GL_UNSIGNED_BYTE ||
3409 internalFormat != GL_STENCIL_INDEX8) {
3410 return GL_INVALID_OPERATION;
3411 }
3412 break;
3413
3414 case GL_ALPHA:
3415 case GL_LUMINANCE:
3416 case GL_LUMINANCE_ALPHA:
3417 switch (type) {
3418 case GL_FLOAT:
3419 if (!_mesa_has_OES_texture_float(ctx) || internalFormat != format)
3420 return GL_INVALID_OPERATION;
3421 break;
3422 case GL_HALF_FLOAT_OES:
3423 if (!_mesa_has_OES_texture_half_float(ctx) || internalFormat != format)
3424 return GL_INVALID_OPERATION;
3425 break;
3426 case GL_UNSIGNED_BYTE:
3427 if (!(format == internalFormat ||
3428 (format == GL_ALPHA && internalFormat == GL_ALPHA8) ||
3429 (format == GL_LUMINANCE && internalFormat == GL_LUMINANCE8) ||
3430 (format == GL_LUMINANCE_ALPHA &&
3431 ((internalFormat == GL_LUMINANCE8_ALPHA8) ||
3432 (internalFormat == GL_LUMINANCE4_ALPHA4))))) {
3433 return GL_INVALID_OPERATION;
3434 }
3435 break;
3436 default:
3437 return GL_INVALID_OPERATION;
3438 }
3439 break;
3440 }
3441
3442 return GL_NO_ERROR;
3443 }
3444
3445 static void
3446 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3447 {
3448 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3449 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3450 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3451 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3452 }
3453
3454 static bool
3455 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3456 {
3457 switch (format) {
3458 case GL_RGBA:
3459 case GL_RGBA_INTEGER_EXT:
3460 set_swizzle(swizzle, 0, 1, 2, 3);
3461 return true;
3462 case GL_BGRA:
3463 case GL_BGRA_INTEGER_EXT:
3464 set_swizzle(swizzle, 2, 1, 0, 3);
3465 return true;
3466 case GL_ABGR_EXT:
3467 set_swizzle(swizzle, 3, 2, 1, 0);
3468 return true;
3469 case GL_RGB:
3470 case GL_RGB_INTEGER_EXT:
3471 set_swizzle(swizzle, 0, 1, 2, 5);
3472 return true;
3473 case GL_BGR:
3474 case GL_BGR_INTEGER_EXT:
3475 set_swizzle(swizzle, 2, 1, 0, 5);
3476 return true;
3477 case GL_LUMINANCE_ALPHA:
3478 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3479 set_swizzle(swizzle, 0, 0, 0, 1);
3480 return true;
3481 case GL_RG:
3482 case GL_RG_INTEGER:
3483 set_swizzle(swizzle, 0, 1, 4, 5);
3484 return true;
3485 case GL_RED:
3486 case GL_RED_INTEGER_EXT:
3487 set_swizzle(swizzle, 0, 4, 4, 5);
3488 return true;
3489 case GL_GREEN:
3490 case GL_GREEN_INTEGER_EXT:
3491 set_swizzle(swizzle, 4, 0, 4, 5);
3492 return true;
3493 case GL_BLUE:
3494 case GL_BLUE_INTEGER_EXT:
3495 set_swizzle(swizzle, 4, 4, 0, 5);
3496 return true;
3497 case GL_ALPHA:
3498 case GL_ALPHA_INTEGER_EXT:
3499 set_swizzle(swizzle, 4, 4, 4, 0);
3500 return true;
3501 case GL_LUMINANCE:
3502 case GL_LUMINANCE_INTEGER_EXT:
3503 set_swizzle(swizzle, 0, 0, 0, 5);
3504 return true;
3505 case GL_INTENSITY:
3506 set_swizzle(swizzle, 0, 0, 0, 0);
3507 return true;
3508 case GL_DEPTH_COMPONENT:
3509 set_swizzle(swizzle, 0, 6, 6, 6);
3510 return true;
3511 case GL_STENCIL_INDEX:
3512 set_swizzle(swizzle, 6, 0, 6, 6);
3513 return true;
3514 default:
3515 return false;
3516 }
3517 }
3518
3519 bool
3520 _mesa_swap_bytes_in_type_enum(GLenum *type)
3521 {
3522 switch (*type) {
3523 case GL_UNSIGNED_INT_8_8_8_8:
3524 *type = GL_UNSIGNED_INT_8_8_8_8_REV;
3525 return true;
3526 case GL_UNSIGNED_INT_8_8_8_8_REV:
3527 *type = GL_UNSIGNED_INT_8_8_8_8;
3528 return true;
3529 case GL_UNSIGNED_SHORT_8_8_MESA:
3530 *type = GL_UNSIGNED_SHORT_8_8_REV_MESA;
3531 return true;
3532 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3533 *type = GL_UNSIGNED_SHORT_8_8_MESA;
3534 return true;
3535 case GL_BYTE:
3536 case GL_UNSIGNED_BYTE:
3537 /* format/types that are arrays of 8-bit values are unaffected by
3538 * swapBytes.
3539 */
3540 return true;
3541 default:
3542 /* swapping bytes on 4444, 1555, or >8 bit per channel types etc. will
3543 * never match a Mesa format.
3544 */
3545 return false;
3546 }
3547 }
3548
3549 /**
3550 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3551 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3552 * otherwise (for non-array formats).
3553 *
3554 * This function will typically be used to compute a mesa format from a GL type
3555 * so we can then call _mesa_format_convert. This function does
3556 * not consider byte swapping, so it returns types assuming that no byte
3557 * swapping is involved. If byte swapping is involved then clients are supposed
3558 * to handle that on their side before calling _mesa_format_convert.
3559 *
3560 * This function returns an uint32_t that can pack a mesa_format or a
3561 * mesa_array_format. Clients must check the mesa array format bit
3562 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3563 * format is a mesa_array_format or a mesa_format.
3564 */
3565 uint32_t