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mesa: Add a helper function _mesa_unpack_format_to_base_format()
[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 "enums.h"
32
33 enum {
34 ZERO = 4,
35 ONE = 5
36 };
37
38 enum {
39 IDX_LUMINANCE = 0,
40 IDX_ALPHA,
41 IDX_INTENSITY,
42 IDX_LUMINANCE_ALPHA,
43 IDX_RGB,
44 IDX_RGBA,
45 IDX_RED,
46 IDX_GREEN,
47 IDX_BLUE,
48 IDX_BGR,
49 IDX_BGRA,
50 IDX_ABGR,
51 IDX_RG,
52 MAX_IDX
53 };
54
55 #define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
56 #define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
57 #define MAP3(x,y,z) MAP4(x, y, z, ZERO)
58 #define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
59
60 static const struct {
61 GLubyte format_idx;
62 GLubyte to_rgba[6];
63 GLubyte from_rgba[6];
64 } mappings[MAX_IDX] =
65 {
66 {
67 IDX_LUMINANCE,
68 MAP4(0,0,0,ONE),
69 MAP1(0)
70 },
71
72 {
73 IDX_ALPHA,
74 MAP4(ZERO, ZERO, ZERO, 0),
75 MAP1(3)
76 },
77
78 {
79 IDX_INTENSITY,
80 MAP4(0, 0, 0, 0),
81 MAP1(0),
82 },
83
84 {
85 IDX_LUMINANCE_ALPHA,
86 MAP4(0,0,0,1),
87 MAP2(0,3)
88 },
89
90 {
91 IDX_RGB,
92 MAP4(0,1,2,ONE),
93 MAP3(0,1,2)
94 },
95
96 {
97 IDX_RGBA,
98 MAP4(0,1,2,3),
99 MAP4(0,1,2,3),
100 },
101
102 {
103 IDX_RED,
104 MAP4(0, ZERO, ZERO, ONE),
105 MAP1(0),
106 },
107
108 {
109 IDX_GREEN,
110 MAP4(ZERO, 0, ZERO, ONE),
111 MAP1(1),
112 },
113
114 {
115 IDX_BLUE,
116 MAP4(ZERO, ZERO, 0, ONE),
117 MAP1(2),
118 },
119
120 {
121 IDX_BGR,
122 MAP4(2,1,0,ONE),
123 MAP3(2,1,0)
124 },
125
126 {
127 IDX_BGRA,
128 MAP4(2,1,0,3),
129 MAP4(2,1,0,3)
130 },
131
132 {
133 IDX_ABGR,
134 MAP4(3,2,1,0),
135 MAP4(3,2,1,0)
136 },
137
138 {
139 IDX_RG,
140 MAP4(0, 1, ZERO, ONE),
141 MAP2(0, 1)
142 },
143 };
144
145 /**
146 * Convert a GL image format enum to an IDX_* value (see above).
147 */
148 static int
149 get_map_idx(GLenum value)
150 {
151 switch (value) {
152 case GL_LUMINANCE:
153 case GL_LUMINANCE_INTEGER_EXT:
154 return IDX_LUMINANCE;
155 case GL_ALPHA:
156 case GL_ALPHA_INTEGER:
157 return IDX_ALPHA;
158 case GL_INTENSITY:
159 return IDX_INTENSITY;
160 case GL_LUMINANCE_ALPHA:
161 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
162 return IDX_LUMINANCE_ALPHA;
163 case GL_RGB:
164 case GL_RGB_INTEGER:
165 return IDX_RGB;
166 case GL_RGBA:
167 case GL_RGBA_INTEGER:
168 return IDX_RGBA;
169 case GL_RED:
170 case GL_RED_INTEGER:
171 return IDX_RED;
172 case GL_GREEN:
173 return IDX_GREEN;
174 case GL_BLUE:
175 return IDX_BLUE;
176 case GL_BGR:
177 case GL_BGR_INTEGER:
178 return IDX_BGR;
179 case GL_BGRA:
180 case GL_BGRA_INTEGER:
181 return IDX_BGRA;
182 case GL_ABGR_EXT:
183 return IDX_ABGR;
184 case GL_RG:
185 case GL_RG_INTEGER:
186 return IDX_RG;
187 default:
188 _mesa_problem(NULL, "Unexpected inFormat %s",
189 _mesa_enum_to_string(value));
190 return 0;
191 }
192 }
193
194 /**
195 * When promoting texture formats (see below) we need to compute the
196 * mapping of dest components back to source components.
197 * This function does that.
198 * \param inFormat the incoming format of the texture
199 * \param outFormat the final texture format
200 * \return map[6] a full 6-component map
201 */
202 void
203 _mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
204 {
205 const int inFmt = get_map_idx(inFormat);
206 const int outFmt = get_map_idx(outFormat);
207 const GLubyte *in2rgba = mappings[inFmt].to_rgba;
208 const GLubyte *rgba2out = mappings[outFmt].from_rgba;
209 int i;
210
211 for (i = 0; i < 4; i++)
212 map[i] = in2rgba[rgba2out[i]];
213
214 map[ZERO] = ZERO;
215 map[ONE] = ONE;
216
217 #if 0
218 printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
219 inFormat, _mesa_enum_to_string(inFormat),
220 outFormat, _mesa_enum_to_string(outFormat),
221 map[0],
222 map[1],
223 map[2],
224 map[3],
225 map[4],
226 map[5]);
227 #endif
228 }
229
230 /**
231 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
232 */
233 GLboolean
234 _mesa_type_is_packed(GLenum type)
235 {
236 switch (type) {
237 case GL_UNSIGNED_BYTE_3_3_2:
238 case GL_UNSIGNED_BYTE_2_3_3_REV:
239 case MESA_UNSIGNED_BYTE_4_4:
240 case GL_UNSIGNED_SHORT_5_6_5:
241 case GL_UNSIGNED_SHORT_5_6_5_REV:
242 case GL_UNSIGNED_SHORT_4_4_4_4:
243 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
244 case GL_UNSIGNED_SHORT_5_5_5_1:
245 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
246 case GL_UNSIGNED_INT_8_8_8_8:
247 case GL_UNSIGNED_INT_8_8_8_8_REV:
248 case GL_UNSIGNED_INT_10_10_10_2:
249 case GL_UNSIGNED_INT_2_10_10_10_REV:
250 case GL_UNSIGNED_SHORT_8_8_MESA:
251 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
252 case GL_UNSIGNED_INT_24_8_EXT:
253 case GL_UNSIGNED_INT_5_9_9_9_REV:
254 case GL_UNSIGNED_INT_10F_11F_11F_REV:
255 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
256 return GL_TRUE;
257 }
258
259 return GL_FALSE;
260 }
261
262
263 /**
264 * Get the size of a GL data type.
265 *
266 * \param type GL data type.
267 *
268 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
269 * if an invalid type enum.
270 */
271 GLint
272 _mesa_sizeof_type(GLenum type)
273 {
274 switch (type) {
275 case GL_BITMAP:
276 return 0;
277 case GL_UNSIGNED_BYTE:
278 return sizeof(GLubyte);
279 case GL_BYTE:
280 return sizeof(GLbyte);
281 case GL_UNSIGNED_SHORT:
282 return sizeof(GLushort);
283 case GL_SHORT:
284 return sizeof(GLshort);
285 case GL_UNSIGNED_INT:
286 return sizeof(GLuint);
287 case GL_INT:
288 return sizeof(GLint);
289 case GL_FLOAT:
290 return sizeof(GLfloat);
291 case GL_DOUBLE:
292 return sizeof(GLdouble);
293 case GL_HALF_FLOAT_ARB:
294 case GL_HALF_FLOAT_OES:
295 return sizeof(GLhalfARB);
296 case GL_FIXED:
297 return sizeof(GLfixed);
298 default:
299 return -1;
300 }
301 }
302
303
304 /**
305 * Same as _mesa_sizeof_type() but also accepting the packed pixel
306 * format data types.
307 */
308 GLint
309 _mesa_sizeof_packed_type(GLenum type)
310 {
311 switch (type) {
312 case GL_BITMAP:
313 return 0;
314 case GL_UNSIGNED_BYTE:
315 return sizeof(GLubyte);
316 case GL_BYTE:
317 return sizeof(GLbyte);
318 case GL_UNSIGNED_SHORT:
319 return sizeof(GLushort);
320 case GL_SHORT:
321 return sizeof(GLshort);
322 case GL_UNSIGNED_INT:
323 return sizeof(GLuint);
324 case GL_INT:
325 return sizeof(GLint);
326 case GL_HALF_FLOAT_ARB:
327 case GL_HALF_FLOAT_OES:
328 return sizeof(GLhalfARB);
329 case GL_FLOAT:
330 return sizeof(GLfloat);
331 case GL_UNSIGNED_BYTE_3_3_2:
332 case GL_UNSIGNED_BYTE_2_3_3_REV:
333 case MESA_UNSIGNED_BYTE_4_4:
334 return sizeof(GLubyte);
335 case GL_UNSIGNED_SHORT_5_6_5:
336 case GL_UNSIGNED_SHORT_5_6_5_REV:
337 case GL_UNSIGNED_SHORT_4_4_4_4:
338 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
339 case GL_UNSIGNED_SHORT_5_5_5_1:
340 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
341 case GL_UNSIGNED_SHORT_8_8_MESA:
342 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
343 return sizeof(GLushort);
344 case GL_UNSIGNED_INT_8_8_8_8:
345 case GL_UNSIGNED_INT_8_8_8_8_REV:
346 case GL_UNSIGNED_INT_10_10_10_2:
347 case GL_UNSIGNED_INT_2_10_10_10_REV:
348 case GL_UNSIGNED_INT_24_8_EXT:
349 case GL_UNSIGNED_INT_5_9_9_9_REV:
350 case GL_UNSIGNED_INT_10F_11F_11F_REV:
351 return sizeof(GLuint);
352 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
353 return 8;
354 default:
355 return -1;
356 }
357 }
358
359
360 /**
361 * Get the number of components in a pixel format.
362 *
363 * \param format pixel format.
364 *
365 * \return the number of components in the given format, or -1 if a bad format.
366 */
367 GLint
368 _mesa_components_in_format(GLenum format)
369 {
370 switch (format) {
371 case GL_COLOR_INDEX:
372 case GL_STENCIL_INDEX:
373 case GL_DEPTH_COMPONENT:
374 case GL_RED:
375 case GL_RED_INTEGER_EXT:
376 case GL_GREEN:
377 case GL_GREEN_INTEGER_EXT:
378 case GL_BLUE:
379 case GL_BLUE_INTEGER_EXT:
380 case GL_ALPHA:
381 case GL_ALPHA_INTEGER_EXT:
382 case GL_LUMINANCE:
383 case GL_LUMINANCE_INTEGER_EXT:
384 case GL_INTENSITY:
385 return 1;
386
387 case GL_LUMINANCE_ALPHA:
388 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
389 case GL_RG:
390 case GL_YCBCR_MESA:
391 case GL_DEPTH_STENCIL_EXT:
392 case GL_RG_INTEGER:
393 return 2;
394
395 case GL_RGB:
396 case GL_BGR:
397 case GL_RGB_INTEGER_EXT:
398 case GL_BGR_INTEGER_EXT:
399 return 3;
400
401 case GL_RGBA:
402 case GL_BGRA:
403 case GL_ABGR_EXT:
404 case GL_RGBA_INTEGER_EXT:
405 case GL_BGRA_INTEGER_EXT:
406 return 4;
407
408 default:
409 return -1;
410 }
411 }
412
413
414 /**
415 * Get the bytes per pixel of pixel format type pair.
416 *
417 * \param format pixel format.
418 * \param type pixel type.
419 *
420 * \return bytes per pixel, or -1 if a bad format or type was given.
421 */
422 GLint
423 _mesa_bytes_per_pixel(GLenum format, GLenum type)
424 {
425 GLint comps = _mesa_components_in_format(format);
426 if (comps < 0)
427 return -1;
428
429 switch (type) {
430 case GL_BITMAP:
431 return 0; /* special case */
432 case GL_BYTE:
433 case GL_UNSIGNED_BYTE:
434 return comps * sizeof(GLubyte);
435 case GL_SHORT:
436 case GL_UNSIGNED_SHORT:
437 return comps * sizeof(GLshort);
438 case GL_INT:
439 case GL_UNSIGNED_INT:
440 return comps * sizeof(GLint);
441 case GL_FLOAT:
442 return comps * sizeof(GLfloat);
443 case GL_HALF_FLOAT_ARB:
444 case GL_HALF_FLOAT_OES:
445 return comps * sizeof(GLhalfARB);
446 case GL_UNSIGNED_BYTE_3_3_2:
447 case GL_UNSIGNED_BYTE_2_3_3_REV:
448 if (format == GL_RGB || format == GL_BGR ||
449 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
450 return sizeof(GLubyte);
451 else
452 return -1; /* error */
453 case GL_UNSIGNED_SHORT_5_6_5:
454 case GL_UNSIGNED_SHORT_5_6_5_REV:
455 if (format == GL_RGB || format == GL_BGR ||
456 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
457 return sizeof(GLushort);
458 else
459 return -1; /* error */
460 case GL_UNSIGNED_SHORT_4_4_4_4:
461 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
462 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
463 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
464 return sizeof(GLushort);
465 else
466 return -1;
467 case GL_UNSIGNED_SHORT_5_5_5_1:
468 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
469 if (format == GL_RGBA || format == GL_BGRA ||
470 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
471 return sizeof(GLushort);
472 else
473 return -1;
474 case GL_UNSIGNED_INT_8_8_8_8:
475 case GL_UNSIGNED_INT_8_8_8_8_REV:
476 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
477 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
478 format == GL_RGB)
479 return sizeof(GLuint);
480 else
481 return -1;
482 case GL_UNSIGNED_INT_10_10_10_2:
483 case GL_UNSIGNED_INT_2_10_10_10_REV:
484 if (format == GL_RGBA || format == GL_BGRA ||
485 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
486 format == GL_RGB)
487 return sizeof(GLuint);
488 else
489 return -1;
490 case GL_UNSIGNED_SHORT_8_8_MESA:
491 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
492 if (format == GL_YCBCR_MESA)
493 return sizeof(GLushort);
494 else
495 return -1;
496 case GL_UNSIGNED_INT_24_8_EXT:
497 if (format == GL_DEPTH_STENCIL_EXT)
498 return sizeof(GLuint);
499 else
500 return -1;
501 case GL_UNSIGNED_INT_5_9_9_9_REV:
502 if (format == GL_RGB)
503 return sizeof(GLuint);
504 else
505 return -1;
506 case GL_UNSIGNED_INT_10F_11F_11F_REV:
507 if (format == GL_RGB)
508 return sizeof(GLuint);
509 else
510 return -1;
511 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
512 if (format == GL_DEPTH_STENCIL)
513 return 8;
514 else
515 return -1;
516 default:
517 return -1;
518 }
519 }
520
521
522 /**
523 * Get the number of bytes for a vertex attrib with the given number of
524 * components and type.
525 *
526 * \param comps number of components.
527 * \param type data type.
528 *
529 * \return bytes per attribute, or -1 if a bad comps/type combination was given.
530 */
531 GLint
532 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
533 {
534 switch (type) {
535 case GL_BYTE:
536 case GL_UNSIGNED_BYTE:
537 return comps * sizeof(GLubyte);
538 case GL_SHORT:
539 case GL_UNSIGNED_SHORT:
540 return comps * sizeof(GLshort);
541 case GL_INT:
542 case GL_UNSIGNED_INT:
543 return comps * sizeof(GLint);
544 case GL_FLOAT:
545 return comps * sizeof(GLfloat);
546 case GL_HALF_FLOAT_ARB:
547 return comps * sizeof(GLhalfARB);
548 case GL_DOUBLE:
549 return comps * sizeof(GLdouble);
550 case GL_FIXED:
551 return comps * sizeof(GLfixed);
552 case GL_INT_2_10_10_10_REV:
553 case GL_UNSIGNED_INT_2_10_10_10_REV:
554 if (comps == 4)
555 return sizeof(GLuint);
556 else
557 return -1;
558 case GL_UNSIGNED_INT_10F_11F_11F_REV:
559 if (comps == 3)
560 return sizeof(GLuint);
561 else
562 return -1;
563 default:
564 return -1;
565 }
566 }
567
568 /**
569 * Test if the given format is unsized.
570 */
571 GLboolean
572 _mesa_is_enum_format_unsized(GLenum format)
573 {
574 switch (format) {
575 case GL_RGBA:
576 case GL_BGRA:
577 case GL_ABGR_EXT:
578 case GL_RGB:
579 case GL_BGR:
580 case GL_RG:
581 case GL_RED:
582 case GL_GREEN:
583 case GL_BLUE:
584 case GL_ALPHA:
585 case GL_INTENSITY:
586 case GL_LUMINANCE:
587 case GL_LUMINANCE_ALPHA:
588
589 case GL_SRGB:
590 case GL_SRGB_ALPHA:
591 case GL_SLUMINANCE:
592 case GL_SLUMINANCE_ALPHA:
593
594 case GL_RGBA_SNORM:
595 case GL_RGB_SNORM:
596 case GL_RG_SNORM:
597 case GL_RED_SNORM:
598 case GL_ALPHA_SNORM:
599 case GL_INTENSITY_SNORM:
600 case GL_LUMINANCE_SNORM:
601 case GL_LUMINANCE_ALPHA_SNORM:
602
603 case GL_RED_INTEGER:
604 case GL_GREEN_INTEGER:
605 case GL_BLUE_INTEGER:
606 case GL_ALPHA_INTEGER:
607 case GL_RGB_INTEGER:
608 case GL_RGBA_INTEGER:
609 case GL_BGR_INTEGER:
610 case GL_BGRA_INTEGER:
611 case GL_RG_INTEGER:
612 case GL_LUMINANCE_INTEGER_EXT:
613 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
614
615 case GL_DEPTH_COMPONENT:
616 case GL_DEPTH_STENCIL:
617 case GL_STENCIL_INDEX:
618 return GL_TRUE;
619 default:
620 return GL_FALSE;
621 }
622 }
623
624 /**
625 * Test if the given format is a UNORM (unsigned-normalized) format.
626 */
627 GLboolean
628 _mesa_is_enum_format_unorm(GLenum format)
629 {
630 switch(format) {
631 case GL_RED:
632 case GL_GREEN:
633 case GL_BLUE:
634 case GL_ALPHA:
635 case GL_ALPHA4:
636 case GL_ALPHA8:
637 case GL_ALPHA12:
638 case GL_ALPHA16:
639 case 1:
640 case GL_LUMINANCE:
641 case GL_SLUMINANCE:
642 case GL_LUMINANCE4:
643 case GL_LUMINANCE8:
644 case GL_LUMINANCE12:
645 case GL_LUMINANCE16:
646 case 2:
647 case GL_LUMINANCE_ALPHA:
648 case GL_SLUMINANCE_ALPHA:
649 case GL_LUMINANCE4_ALPHA4:
650 case GL_LUMINANCE6_ALPHA2:
651 case GL_LUMINANCE8_ALPHA8:
652 case GL_LUMINANCE12_ALPHA4:
653 case GL_LUMINANCE12_ALPHA12:
654 case GL_LUMINANCE16_ALPHA16:
655 case GL_INTENSITY:
656 case GL_INTENSITY4:
657 case GL_INTENSITY8:
658 case GL_INTENSITY12:
659 case GL_INTENSITY16:
660 case GL_R8:
661 case GL_R16:
662 case GL_RG:
663 case GL_RG8:
664 case GL_RG16:
665 case 3:
666 case GL_RGB:
667 case GL_BGR:
668 case GL_SRGB:
669 case GL_R3_G3_B2:
670 case GL_RGB4:
671 case GL_RGB5:
672 case GL_RGB565:
673 case GL_RGB8:
674 case GL_RGB10:
675 case GL_RGB12:
676 case GL_RGB16:
677 case 4:
678 case GL_ABGR_EXT:
679 case GL_RGBA:
680 case GL_BGRA:
681 case GL_SRGB_ALPHA:
682 case GL_RGBA2:
683 case GL_RGBA4:
684 case GL_RGB5_A1:
685 case GL_RGBA8:
686 case GL_RGB10_A2:
687 case GL_RGBA12:
688 case GL_RGBA16:
689 return GL_TRUE;
690 default:
691 return GL_FALSE;
692 }
693 }
694
695 /**
696 * Test if the given format is a SNORM (signed-normalized) format.
697 */
698 GLboolean
699 _mesa_is_enum_format_snorm(GLenum format)
700 {
701 switch (format) {
702 /* signed, normalized texture formats */
703 case GL_RED_SNORM:
704 case GL_R8_SNORM:
705 case GL_R16_SNORM:
706 case GL_RG_SNORM:
707 case GL_RG8_SNORM:
708 case GL_RG16_SNORM:
709 case GL_RGB_SNORM:
710 case GL_RGB8_SNORM:
711 case GL_RGB16_SNORM:
712 case GL_RGBA_SNORM:
713 case GL_RGBA8_SNORM:
714 case GL_RGBA16_SNORM:
715 case GL_ALPHA_SNORM:
716 case GL_ALPHA8_SNORM:
717 case GL_ALPHA16_SNORM:
718 case GL_LUMINANCE_SNORM:
719 case GL_LUMINANCE8_SNORM:
720 case GL_LUMINANCE16_SNORM:
721 case GL_LUMINANCE_ALPHA_SNORM:
722 case GL_LUMINANCE8_ALPHA8_SNORM:
723 case GL_LUMINANCE16_ALPHA16_SNORM:
724 case GL_INTENSITY_SNORM:
725 case GL_INTENSITY8_SNORM:
726 case GL_INTENSITY16_SNORM:
727 return GL_TRUE;
728 default:
729 return GL_FALSE;
730 }
731 }
732
733 /**
734 * Test if the given format is an integer (non-normalized) format.
735 */
736 GLboolean
737 _mesa_is_enum_format_unsigned_int(GLenum format)
738 {
739 switch (format) {
740 /* specific integer formats */
741 case GL_RGBA32UI_EXT:
742 case GL_RGB32UI_EXT:
743 case GL_RG32UI:
744 case GL_R32UI:
745 case GL_ALPHA32UI_EXT:
746 case GL_INTENSITY32UI_EXT:
747 case GL_LUMINANCE32UI_EXT:
748 case GL_LUMINANCE_ALPHA32UI_EXT:
749 case GL_RGBA16UI_EXT:
750 case GL_RGB16UI_EXT:
751 case GL_RG16UI:
752 case GL_R16UI:
753 case GL_ALPHA16UI_EXT:
754 case GL_INTENSITY16UI_EXT:
755 case GL_LUMINANCE16UI_EXT:
756 case GL_LUMINANCE_ALPHA16UI_EXT:
757 case GL_RGBA8UI_EXT:
758 case GL_RGB8UI_EXT:
759 case GL_RG8UI:
760 case GL_R8UI:
761 case GL_ALPHA8UI_EXT:
762 case GL_INTENSITY8UI_EXT:
763 case GL_LUMINANCE8UI_EXT:
764 case GL_LUMINANCE_ALPHA8UI_EXT:
765 case GL_RGB10_A2UI:
766 return GL_TRUE;
767 default:
768 return GL_FALSE;
769 }
770 }
771
772
773 /**
774 * Test if the given format is an integer (non-normalized) format.
775 */
776 GLboolean
777 _mesa_is_enum_format_signed_int(GLenum format)
778 {
779 switch (format) {
780 /* generic integer formats */
781 case GL_RED_INTEGER_EXT:
782 case GL_GREEN_INTEGER_EXT:
783 case GL_BLUE_INTEGER_EXT:
784 case GL_ALPHA_INTEGER_EXT:
785 case GL_RGB_INTEGER_EXT:
786 case GL_RGBA_INTEGER_EXT:
787 case GL_BGR_INTEGER_EXT:
788 case GL_BGRA_INTEGER_EXT:
789 case GL_LUMINANCE_INTEGER_EXT:
790 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
791 case GL_RG_INTEGER:
792 /* specific integer formats */
793 case GL_RGBA32I_EXT:
794 case GL_RGB32I_EXT:
795 case GL_RG32I:
796 case GL_R32I:
797 case GL_ALPHA32I_EXT:
798 case GL_INTENSITY32I_EXT:
799 case GL_LUMINANCE32I_EXT:
800 case GL_LUMINANCE_ALPHA32I_EXT:
801 case GL_RGBA16I_EXT:
802 case GL_RGB16I_EXT:
803 case GL_RG16I:
804 case GL_R16I:
805 case GL_ALPHA16I_EXT:
806 case GL_INTENSITY16I_EXT:
807 case GL_LUMINANCE16I_EXT:
808 case GL_LUMINANCE_ALPHA16I_EXT:
809 case GL_RGBA8I_EXT:
810 case GL_RGB8I_EXT:
811 case GL_RG8I:
812 case GL_R8I:
813 case GL_ALPHA8I_EXT:
814 case GL_INTENSITY8I_EXT:
815 case GL_LUMINANCE8I_EXT:
816 case GL_LUMINANCE_ALPHA8I_EXT:
817 return GL_TRUE;
818 default:
819 return GL_FALSE;
820 }
821 }
822
823
824 /**
825 * Test if the given format is an integer (non-normalized) format.
826 */
827 GLboolean
828 _mesa_is_enum_format_integer(GLenum format)
829 {
830 return _mesa_is_enum_format_unsigned_int(format) ||
831 _mesa_is_enum_format_signed_int(format);
832 }
833
834
835 GLboolean
836 _mesa_is_type_unsigned(GLenum type)
837 {
838 switch (type) {
839 case GL_UNSIGNED_INT:
840 case GL_UNSIGNED_INT_8_8_8_8:
841 case GL_UNSIGNED_INT_8_8_8_8_REV:
842 case GL_UNSIGNED_INT_10_10_10_2:
843 case GL_UNSIGNED_INT_2_10_10_10_REV:
844
845 case GL_UNSIGNED_SHORT:
846 case GL_UNSIGNED_SHORT_4_4_4_4:
847 case GL_UNSIGNED_SHORT_5_5_5_1:
848 case GL_UNSIGNED_SHORT_5_6_5:
849 case GL_UNSIGNED_SHORT_5_6_5_REV:
850 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
851 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
852 case GL_UNSIGNED_SHORT_8_8_MESA:
853 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
854
855 case GL_UNSIGNED_BYTE:
856 case GL_UNSIGNED_BYTE_3_3_2:
857 case GL_UNSIGNED_BYTE_2_3_3_REV:
858 return GL_TRUE;
859
860 default:
861 return GL_FALSE;
862 }
863 }
864
865
866 /**
867 * Test if the given image format is a color/RGBA format (i.e., not color
868 * index, depth, stencil, etc).
869 * \param format the image format value (may by an internal texture format)
870 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
871 */
872 GLboolean
873 _mesa_is_color_format(GLenum format)
874 {
875 switch (format) {
876 case GL_RED:
877 case GL_GREEN:
878 case GL_BLUE:
879 case GL_ALPHA:
880 case GL_ALPHA4:
881 case GL_ALPHA8:
882 case GL_ALPHA12:
883 case GL_ALPHA16:
884 case 1:
885 case GL_LUMINANCE:
886 case GL_LUMINANCE4:
887 case GL_LUMINANCE8:
888 case GL_LUMINANCE12:
889 case GL_LUMINANCE16:
890 case 2:
891 case GL_LUMINANCE_ALPHA:
892 case GL_LUMINANCE4_ALPHA4:
893 case GL_LUMINANCE6_ALPHA2:
894 case GL_LUMINANCE8_ALPHA8:
895 case GL_LUMINANCE12_ALPHA4:
896 case GL_LUMINANCE12_ALPHA12:
897 case GL_LUMINANCE16_ALPHA16:
898 case GL_INTENSITY:
899 case GL_INTENSITY4:
900 case GL_INTENSITY8:
901 case GL_INTENSITY12:
902 case GL_INTENSITY16:
903 case GL_R8:
904 case GL_R16:
905 case GL_RG:
906 case GL_RG8:
907 case GL_RG16:
908 case 3:
909 case GL_RGB:
910 case GL_BGR:
911 case GL_R3_G3_B2:
912 case GL_RGB4:
913 case GL_RGB5:
914 case GL_RGB565:
915 case GL_RGB8:
916 case GL_RGB10:
917 case GL_RGB12:
918 case GL_RGB16:
919 case 4:
920 case GL_ABGR_EXT:
921 case GL_RGBA:
922 case GL_BGRA:
923 case GL_RGBA2:
924 case GL_RGBA4:
925 case GL_RGB5_A1:
926 case GL_RGBA8:
927 case GL_RGB10_A2:
928 case GL_RGBA12:
929 case GL_RGBA16:
930 /* float texture formats */
931 case GL_ALPHA16F_ARB:
932 case GL_ALPHA32F_ARB:
933 case GL_LUMINANCE16F_ARB:
934 case GL_LUMINANCE32F_ARB:
935 case GL_LUMINANCE_ALPHA16F_ARB:
936 case GL_LUMINANCE_ALPHA32F_ARB:
937 case GL_INTENSITY16F_ARB:
938 case GL_INTENSITY32F_ARB:
939 case GL_R16F:
940 case GL_R32F:
941 case GL_RG16F:
942 case GL_RG32F:
943 case GL_RGB16F_ARB:
944 case GL_RGB32F_ARB:
945 case GL_RGBA16F_ARB:
946 case GL_RGBA32F_ARB:
947 /* compressed formats */
948 case GL_COMPRESSED_ALPHA:
949 case GL_COMPRESSED_LUMINANCE:
950 case GL_COMPRESSED_LUMINANCE_ALPHA:
951 case GL_COMPRESSED_INTENSITY:
952 case GL_COMPRESSED_RED:
953 case GL_COMPRESSED_RG:
954 case GL_COMPRESSED_RGB:
955 case GL_COMPRESSED_RGBA:
956 case GL_RGB_S3TC:
957 case GL_RGB4_S3TC:
958 case GL_RGBA_S3TC:
959 case GL_RGBA4_S3TC:
960 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
961 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
962 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
963 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
964 case GL_COMPRESSED_RGB_FXT1_3DFX:
965 case GL_COMPRESSED_RGBA_FXT1_3DFX:
966 case GL_SRGB_EXT:
967 case GL_SRGB8_EXT:
968 case GL_SRGB_ALPHA_EXT:
969 case GL_SRGB8_ALPHA8_EXT:
970 case GL_SLUMINANCE_ALPHA_EXT:
971 case GL_SLUMINANCE8_ALPHA8_EXT:
972 case GL_SLUMINANCE_EXT:
973 case GL_SLUMINANCE8_EXT:
974 case GL_COMPRESSED_SRGB_EXT:
975 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
976 case GL_COMPRESSED_SRGB_ALPHA_EXT:
977 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
978 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
979 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
980 case GL_COMPRESSED_SLUMINANCE_EXT:
981 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
982 case GL_COMPRESSED_RED_RGTC1:
983 case GL_COMPRESSED_SIGNED_RED_RGTC1:
984 case GL_COMPRESSED_RG_RGTC2:
985 case GL_COMPRESSED_SIGNED_RG_RGTC2:
986 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
987 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
988 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
989 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
990 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
991 case GL_ETC1_RGB8_OES:
992 case GL_COMPRESSED_RGB8_ETC2:
993 case GL_COMPRESSED_SRGB8_ETC2:
994 case GL_COMPRESSED_RGBA8_ETC2_EAC:
995 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
996 case GL_COMPRESSED_R11_EAC:
997 case GL_COMPRESSED_RG11_EAC:
998 case GL_COMPRESSED_SIGNED_R11_EAC:
999 case GL_COMPRESSED_SIGNED_RG11_EAC:
1000 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1001 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1002 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1003 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1004 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1005 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1006 /* generic integer formats */
1007 case GL_RED_INTEGER_EXT:
1008 case GL_GREEN_INTEGER_EXT:
1009 case GL_BLUE_INTEGER_EXT:
1010 case GL_ALPHA_INTEGER_EXT:
1011 case GL_RGB_INTEGER_EXT:
1012 case GL_RGBA_INTEGER_EXT:
1013 case GL_BGR_INTEGER_EXT:
1014 case GL_BGRA_INTEGER_EXT:
1015 case GL_RG_INTEGER:
1016 case GL_LUMINANCE_INTEGER_EXT:
1017 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1018 /* sized integer formats */
1019 case GL_RGBA32UI_EXT:
1020 case GL_RGB32UI_EXT:
1021 case GL_RG32UI:
1022 case GL_R32UI:
1023 case GL_ALPHA32UI_EXT:
1024 case GL_INTENSITY32UI_EXT:
1025 case GL_LUMINANCE32UI_EXT:
1026 case GL_LUMINANCE_ALPHA32UI_EXT:
1027 case GL_RGBA16UI_EXT:
1028 case GL_RGB16UI_EXT:
1029 case GL_RG16UI:
1030 case GL_R16UI:
1031 case GL_ALPHA16UI_EXT:
1032 case GL_INTENSITY16UI_EXT:
1033 case GL_LUMINANCE16UI_EXT:
1034 case GL_LUMINANCE_ALPHA16UI_EXT:
1035 case GL_RGBA8UI_EXT:
1036 case GL_RGB8UI_EXT:
1037 case GL_RG8UI:
1038 case GL_R8UI:
1039 case GL_ALPHA8UI_EXT:
1040 case GL_INTENSITY8UI_EXT:
1041 case GL_LUMINANCE8UI_EXT:
1042 case GL_LUMINANCE_ALPHA8UI_EXT:
1043 case GL_RGBA32I_EXT:
1044 case GL_RGB32I_EXT:
1045 case GL_RG32I:
1046 case GL_R32I:
1047 case GL_ALPHA32I_EXT:
1048 case GL_INTENSITY32I_EXT:
1049 case GL_LUMINANCE32I_EXT:
1050 case GL_LUMINANCE_ALPHA32I_EXT:
1051 case GL_RGBA16I_EXT:
1052 case GL_RGB16I_EXT:
1053 case GL_RG16I:
1054 case GL_R16I:
1055 case GL_ALPHA16I_EXT:
1056 case GL_INTENSITY16I_EXT:
1057 case GL_LUMINANCE16I_EXT:
1058 case GL_LUMINANCE_ALPHA16I_EXT:
1059 case GL_RGBA8I_EXT:
1060 case GL_RGB8I_EXT:
1061 case GL_RG8I:
1062 case GL_R8I:
1063 case GL_ALPHA8I_EXT:
1064 case GL_INTENSITY8I_EXT:
1065 case GL_LUMINANCE8I_EXT:
1066 case GL_LUMINANCE_ALPHA8I_EXT:
1067 /* signed, normalized texture formats */
1068 case GL_RED_SNORM:
1069 case GL_R8_SNORM:
1070 case GL_R16_SNORM:
1071 case GL_RG_SNORM:
1072 case GL_RG8_SNORM:
1073 case GL_RG16_SNORM:
1074 case GL_RGB_SNORM:
1075 case GL_RGB8_SNORM:
1076 case GL_RGB16_SNORM:
1077 case GL_RGBA_SNORM:
1078 case GL_RGBA8_SNORM:
1079 case GL_RGBA16_SNORM:
1080 case GL_ALPHA_SNORM:
1081 case GL_ALPHA8_SNORM:
1082 case GL_ALPHA16_SNORM:
1083 case GL_LUMINANCE_SNORM:
1084 case GL_LUMINANCE8_SNORM:
1085 case GL_LUMINANCE16_SNORM:
1086 case GL_LUMINANCE_ALPHA_SNORM:
1087 case GL_LUMINANCE8_ALPHA8_SNORM:
1088 case GL_LUMINANCE16_ALPHA16_SNORM:
1089 case GL_INTENSITY_SNORM:
1090 case GL_INTENSITY8_SNORM:
1091 case GL_INTENSITY16_SNORM:
1092 case GL_RGB9_E5:
1093 case GL_R11F_G11F_B10F:
1094 case GL_RGB10_A2UI:
1095 return GL_TRUE;
1096 case GL_YCBCR_MESA: /* not considered to be RGB */
1097 /* fall-through */
1098 default:
1099 return GL_FALSE;
1100 }
1101 }
1102
1103
1104 /**
1105 * Test if the given image format is a depth component format.
1106 */
1107 GLboolean
1108 _mesa_is_depth_format(GLenum format)
1109 {
1110 switch (format) {
1111 case GL_DEPTH_COMPONENT:
1112 case GL_DEPTH_COMPONENT16:
1113 case GL_DEPTH_COMPONENT24:
1114 case GL_DEPTH_COMPONENT32:
1115 case GL_DEPTH_COMPONENT32F:
1116 return GL_TRUE;
1117 default:
1118 return GL_FALSE;
1119 }
1120 }
1121
1122
1123 /**
1124 * Test if the given image format is a stencil format.
1125 */
1126 GLboolean
1127 _mesa_is_stencil_format(GLenum format)
1128 {
1129 switch (format) {
1130 case GL_STENCIL_INDEX:
1131 return GL_TRUE;
1132 default:
1133 return GL_FALSE;
1134 }
1135 }
1136
1137
1138 /**
1139 * Test if the given image format is a YCbCr format.
1140 */
1141 GLboolean
1142 _mesa_is_ycbcr_format(GLenum format)
1143 {
1144 switch (format) {
1145 case GL_YCBCR_MESA:
1146 return GL_TRUE;
1147 default:
1148 return GL_FALSE;
1149 }
1150 }
1151
1152
1153 /**
1154 * Test if the given image format is a depth+stencil format.
1155 */
1156 GLboolean
1157 _mesa_is_depthstencil_format(GLenum format)
1158 {
1159 switch (format) {
1160 case GL_DEPTH24_STENCIL8_EXT:
1161 case GL_DEPTH_STENCIL_EXT:
1162 case GL_DEPTH32F_STENCIL8:
1163 return GL_TRUE;
1164 default:
1165 return GL_FALSE;
1166 }
1167 }
1168
1169
1170 /**
1171 * Test if the given image format is a depth or stencil format.
1172 */
1173 GLboolean
1174 _mesa_is_depth_or_stencil_format(GLenum format)
1175 {
1176 switch (format) {
1177 case GL_DEPTH_COMPONENT:
1178 case GL_DEPTH_COMPONENT16:
1179 case GL_DEPTH_COMPONENT24:
1180 case GL_DEPTH_COMPONENT32:
1181 case GL_STENCIL_INDEX:
1182 case GL_STENCIL_INDEX1_EXT:
1183 case GL_STENCIL_INDEX4_EXT:
1184 case GL_STENCIL_INDEX8_EXT:
1185 case GL_STENCIL_INDEX16_EXT:
1186 case GL_DEPTH_STENCIL_EXT:
1187 case GL_DEPTH24_STENCIL8_EXT:
1188 case GL_DEPTH_COMPONENT32F:
1189 case GL_DEPTH32F_STENCIL8:
1190 return GL_TRUE;
1191 default:
1192 return GL_FALSE;
1193 }
1194 }
1195
1196
1197 /**
1198 * Test if an image format is a supported compressed format.
1199 * \param format the internal format token provided by the user.
1200 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1201 */
1202 GLboolean
1203 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1204 {
1205 switch (format) {
1206 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1207 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1208 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1209 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1210 /* Assume that the ANGLE flag will always be set if the EXT flag is set.
1211 */
1212 return ctx->Extensions.ANGLE_texture_compression_dxt;
1213 case GL_RGB_S3TC:
1214 case GL_RGB4_S3TC:
1215 case GL_RGBA_S3TC:
1216 case GL_RGBA4_S3TC:
1217 return _mesa_is_desktop_gl(ctx) &&
1218 ctx->Extensions.ANGLE_texture_compression_dxt;
1219 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1220 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1221 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1222 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1223 return _mesa_is_desktop_gl(ctx)
1224 && ctx->Extensions.EXT_texture_sRGB
1225 && ctx->Extensions.EXT_texture_compression_s3tc;
1226 case GL_COMPRESSED_RGB_FXT1_3DFX:
1227 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1228 return _mesa_is_desktop_gl(ctx)
1229 && ctx->Extensions.TDFX_texture_compression_FXT1;
1230 case GL_COMPRESSED_RED_RGTC1:
1231 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1232 case GL_COMPRESSED_RG_RGTC2:
1233 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1234 return _mesa_is_desktop_gl(ctx)
1235 && ctx->Extensions.ARB_texture_compression_rgtc;
1236 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1237 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1238 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1239 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1240 return ctx->API == API_OPENGL_COMPAT
1241 && ctx->Extensions.EXT_texture_compression_latc;
1242 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1243 return ctx->API == API_OPENGL_COMPAT
1244 && ctx->Extensions.ATI_texture_compression_3dc;
1245 case GL_ETC1_RGB8_OES:
1246 return _mesa_is_gles(ctx)
1247 && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
1248 case GL_COMPRESSED_RGB8_ETC2:
1249 case GL_COMPRESSED_SRGB8_ETC2:
1250 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1251 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1252 case GL_COMPRESSED_R11_EAC:
1253 case GL_COMPRESSED_RG11_EAC:
1254 case GL_COMPRESSED_SIGNED_R11_EAC:
1255 case GL_COMPRESSED_SIGNED_RG11_EAC:
1256 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1257 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1258 return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
1259 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1260 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1261 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1262 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1263 return _mesa_is_desktop_gl(ctx) &&
1264 ctx->Extensions.ARB_texture_compression_bptc;
1265 case GL_PALETTE4_RGB8_OES:
1266 case GL_PALETTE4_RGBA8_OES:
1267 case GL_PALETTE4_R5_G6_B5_OES:
1268 case GL_PALETTE4_RGBA4_OES:
1269 case GL_PALETTE4_RGB5_A1_OES:
1270 case GL_PALETTE8_RGB8_OES:
1271 case GL_PALETTE8_RGBA8_OES:
1272 case GL_PALETTE8_R5_G6_B5_OES:
1273 case GL_PALETTE8_RGBA4_OES:
1274 case GL_PALETTE8_RGB5_A1_OES:
1275 return ctx->API == API_OPENGLES;
1276 default:
1277 return GL_FALSE;
1278 }
1279 }
1280
1281 /**
1282 * Convert various unpack formats to the corresponding base format.
1283 */
1284 GLenum
1285 _mesa_unpack_format_to_base_format(GLenum format)
1286 {
1287 switch(format) {
1288 case GL_RED_INTEGER:
1289 return GL_RED;
1290 case GL_GREEN_INTEGER:
1291 return GL_GREEN;
1292 case GL_BLUE_INTEGER:
1293 return GL_BLUE;
1294 case GL_ALPHA_INTEGER:
1295 return GL_ALPHA;
1296 case GL_RG_INTEGER:
1297 return GL_RG;
1298 case GL_RGB_INTEGER:
1299 return GL_RGB;
1300 case GL_RGBA_INTEGER:
1301 return GL_RGBA;
1302 case GL_BGR_INTEGER:
1303 return GL_BGR;
1304 case GL_BGRA_INTEGER:
1305 return GL_BGRA;
1306 case GL_LUMINANCE_INTEGER_EXT:
1307 return GL_LUMINANCE;
1308 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1309 return GL_LUMINANCE_ALPHA;
1310 case GL_RED:
1311 case GL_GREEN:
1312 case GL_BLUE:
1313 case GL_RG:
1314 case GL_RGB:
1315 case GL_RGBA:
1316 case GL_BGR:
1317 case GL_BGRA:
1318 case GL_ALPHA:
1319 case GL_LUMINANCE:
1320 case GL_LUMINANCE_ALPHA:
1321 default:
1322 return format;
1323 }
1324 }
1325
1326 /**
1327 * Convert various base formats to the cooresponding integer format.
1328 */
1329 GLenum
1330 _mesa_base_format_to_integer_format(GLenum format)
1331 {
1332 switch(format) {
1333 case GL_RED:
1334 return GL_RED_INTEGER;
1335 case GL_GREEN:
1336 return GL_GREEN_INTEGER;
1337 case GL_BLUE:
1338 return GL_BLUE_INTEGER;
1339 case GL_RG:
1340 return GL_RG_INTEGER;
1341 case GL_RGB:
1342 return GL_RGB_INTEGER;
1343 case GL_RGBA:
1344 return GL_RGBA_INTEGER;
1345 case GL_BGR:
1346 return GL_BGR_INTEGER;
1347 case GL_BGRA:
1348 return GL_BGRA_INTEGER;
1349 case GL_ALPHA:
1350 return GL_ALPHA_INTEGER;
1351 case GL_LUMINANCE:
1352 return GL_LUMINANCE_INTEGER_EXT;
1353 case GL_LUMINANCE_ALPHA:
1354 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1355 }
1356
1357 return format;
1358 }
1359
1360
1361 /**
1362 * Does the given base texture/renderbuffer format have the channel
1363 * named by 'pname'?
1364 */
1365 GLboolean
1366 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1367 {
1368 switch (pname) {
1369 case GL_TEXTURE_RED_SIZE:
1370 case GL_TEXTURE_RED_TYPE:
1371 case GL_RENDERBUFFER_RED_SIZE_EXT:
1372 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1373 if (base_format == GL_RED ||
1374 base_format == GL_RG ||
1375 base_format == GL_RGB ||
1376 base_format == GL_RGBA) {
1377 return GL_TRUE;
1378 }
1379 return GL_FALSE;
1380 case GL_TEXTURE_GREEN_SIZE:
1381 case GL_TEXTURE_GREEN_TYPE:
1382 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1383 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1384 if (base_format == GL_RG ||
1385 base_format == GL_RGB ||
1386 base_format == GL_RGBA) {
1387 return GL_TRUE;
1388 }
1389 return GL_FALSE;
1390 case GL_TEXTURE_BLUE_SIZE:
1391 case GL_TEXTURE_BLUE_TYPE:
1392 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1393 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1394 if (base_format == GL_RGB ||
1395 base_format == GL_RGBA) {
1396 return GL_TRUE;
1397 }
1398 return GL_FALSE;
1399 case GL_TEXTURE_ALPHA_SIZE:
1400 case GL_TEXTURE_ALPHA_TYPE:
1401 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1402 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1403 if (base_format == GL_RGBA ||
1404 base_format == GL_ALPHA ||
1405 base_format == GL_LUMINANCE_ALPHA) {
1406 return GL_TRUE;
1407 }
1408 return GL_FALSE;
1409 case GL_TEXTURE_LUMINANCE_SIZE:
1410 case GL_TEXTURE_LUMINANCE_TYPE:
1411 if (base_format == GL_LUMINANCE ||
1412 base_format == GL_LUMINANCE_ALPHA) {
1413 return GL_TRUE;
1414 }
1415 return GL_FALSE;
1416 case GL_TEXTURE_INTENSITY_SIZE:
1417 case GL_TEXTURE_INTENSITY_TYPE:
1418 if (base_format == GL_INTENSITY) {
1419 return GL_TRUE;
1420 }
1421 return GL_FALSE;
1422 case GL_TEXTURE_DEPTH_SIZE:
1423 case GL_TEXTURE_DEPTH_TYPE:
1424 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1425 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1426 if (base_format == GL_DEPTH_STENCIL ||
1427 base_format == GL_DEPTH_COMPONENT) {
1428 return GL_TRUE;
1429 }
1430 return GL_FALSE;
1431 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1432 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1433 if (base_format == GL_DEPTH_STENCIL ||
1434 base_format == GL_STENCIL_INDEX) {
1435 return GL_TRUE;
1436 }
1437 return GL_FALSE;
1438 default:
1439 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1440 __func__, pname);
1441 return GL_FALSE;
1442 }
1443
1444 return GL_FALSE;
1445 }
1446
1447
1448 /**
1449 * Returns the number of channels/components for a base format.
1450 */
1451 GLint
1452 _mesa_base_format_component_count(GLenum base_format)
1453 {
1454 switch (base_format) {
1455 case GL_RED:
1456 case GL_ALPHA:
1457 case GL_INTENSITY:
1458 case GL_DEPTH_COMPONENT:
1459 return 1;
1460 case GL_RG:
1461 case GL_LUMINANCE_ALPHA:
1462 case GL_DEPTH_STENCIL:
1463 return 2;
1464 case GL_RGB:
1465 return 3;
1466 case GL_RGBA:
1467 return 4;
1468 default:
1469 return -1;
1470 }
1471 }
1472
1473
1474 /**
1475 * If format is a generic compressed format, return the corresponding
1476 * non-compressed format. For other formats, return the format as-is.
1477 */
1478 GLenum
1479 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1480 {
1481 switch (format) {
1482 case GL_COMPRESSED_RED:
1483 return GL_RED;
1484 case GL_COMPRESSED_RG:
1485 return GL_RG;
1486 case GL_COMPRESSED_RGB:
1487 return GL_RGB;
1488 case GL_COMPRESSED_RGBA:
1489 return GL_RGBA;
1490 case GL_COMPRESSED_ALPHA:
1491 return GL_ALPHA;
1492 case GL_COMPRESSED_LUMINANCE:
1493 return GL_LUMINANCE;
1494 case GL_COMPRESSED_LUMINANCE_ALPHA:
1495 return GL_LUMINANCE_ALPHA;
1496 case GL_COMPRESSED_INTENSITY:
1497 return GL_INTENSITY;
1498 /* sRGB formats */
1499 case GL_COMPRESSED_SRGB:
1500 return GL_SRGB;
1501 case GL_COMPRESSED_SRGB_ALPHA:
1502 return GL_SRGB_ALPHA;
1503 case GL_COMPRESSED_SLUMINANCE:
1504 return GL_SLUMINANCE;
1505 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1506 return GL_SLUMINANCE_ALPHA;
1507 default:
1508 return format;
1509 }
1510 }
1511
1512
1513 /**
1514 * Return the equivalent non-generic internal format.
1515 * This is useful for comparing whether two internal formats are equivalent.
1516 */
1517 GLenum
1518 _mesa_get_nongeneric_internalformat(GLenum format)
1519 {
1520 switch (format) {
1521 /* GL 1.1 formats. */
1522 case 4:
1523 case GL_RGBA:
1524 return GL_RGBA8;
1525 case 3:
1526 case GL_RGB:
1527 return GL_RGB8;
1528 case 2:
1529 case GL_LUMINANCE_ALPHA:
1530 return GL_LUMINANCE8_ALPHA8;
1531 case 1:
1532 case GL_LUMINANCE:
1533 return GL_LUMINANCE8;
1534 case GL_ALPHA:
1535 return GL_ALPHA8;
1536 case GL_INTENSITY:
1537 return GL_INTENSITY8;
1538
1539 /* GL_ARB_texture_rg */
1540 case GL_RED:
1541 return GL_R8;
1542 case GL_RG:
1543 return GL_RG8;
1544
1545 /* GL_EXT_texture_sRGB */
1546 case GL_SRGB:
1547 return GL_SRGB8;
1548 case GL_SRGB_ALPHA:
1549 return GL_SRGB8_ALPHA8;
1550 case GL_SLUMINANCE:
1551 return GL_SLUMINANCE8;
1552 case GL_SLUMINANCE_ALPHA:
1553 return GL_SLUMINANCE8_ALPHA8;
1554
1555 /* GL_EXT_texture_snorm */
1556 case GL_RGBA_SNORM:
1557 return GL_RGBA8_SNORM;
1558 case GL_RGB_SNORM:
1559 return GL_RGB8_SNORM;
1560 case GL_RG_SNORM:
1561 return GL_RG8_SNORM;
1562 case GL_RED_SNORM:
1563 return GL_R8_SNORM;
1564 case GL_LUMINANCE_ALPHA_SNORM:
1565 return GL_LUMINANCE8_ALPHA8_SNORM;
1566 case GL_LUMINANCE_SNORM:
1567 return GL_LUMINANCE8_SNORM;
1568 case GL_ALPHA_SNORM:
1569 return GL_ALPHA8_SNORM;
1570 case GL_INTENSITY_SNORM:
1571 return GL_INTENSITY8_SNORM;
1572
1573 default:
1574 return format;
1575 }
1576 }
1577
1578
1579 /**
1580 * Convert an sRGB internal format to linear.
1581 */
1582 GLenum
1583 _mesa_get_linear_internalformat(GLenum format)
1584 {
1585 switch (format) {
1586 case GL_SRGB:
1587 return GL_RGB;
1588 case GL_SRGB_ALPHA:
1589 return GL_RGBA;
1590 case GL_SRGB8:
1591 return GL_RGB8;
1592 case GL_SRGB8_ALPHA8:
1593 return GL_RGBA8;
1594 case GL_SLUMINANCE8:
1595 return GL_LUMINANCE8;
1596 case GL_SLUMINANCE:
1597 return GL_LUMINANCE;
1598 case GL_SLUMINANCE_ALPHA:
1599 return GL_LUMINANCE_ALPHA;
1600 case GL_SLUMINANCE8_ALPHA8:
1601 return GL_LUMINANCE8_ALPHA8;
1602 default:
1603 return format;
1604 }
1605 }
1606
1607
1608 /**
1609 * Do error checking of format/type combinations for glReadPixels,
1610 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1611 * and type values, we may either generate GL_INVALID_OPERATION or
1612 * GL_INVALID_ENUM.
1613 *
1614 * \param format pixel format.
1615 * \param type pixel type.
1616 *
1617 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1618 */
1619 GLenum
1620 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1621 GLenum format, GLenum type)
1622 {
1623 /* From OpenGL 3.3 spec, page 220:
1624 * "If the format is DEPTH_STENCIL, then values are taken from
1625 * both the depth buffer and the stencil buffer. If there is no
1626 * depth buffer or if there is no stencil buffer, then the error
1627 * INVALID_OPERATION occurs. If the type parameter is not
1628 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1629 * error INVALID_ENUM occurs."
1630 *
1631 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1632 * cannot be used to read depth or stencil in that API.
1633 */
1634 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1635 && type != GL_UNSIGNED_INT_24_8
1636 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1637 return GL_INVALID_ENUM;
1638
1639 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1640 switch (type) {
1641 case GL_BITMAP:
1642 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1643 return GL_INVALID_ENUM;
1644 }
1645 break;
1646
1647 case GL_UNSIGNED_BYTE_3_3_2:
1648 case GL_UNSIGNED_BYTE_2_3_3_REV:
1649 case GL_UNSIGNED_SHORT_5_6_5:
1650 case GL_UNSIGNED_SHORT_5_6_5_REV:
1651 if (format == GL_RGB) {
1652 break; /* OK */
1653 }
1654 if (format == GL_RGB_INTEGER_EXT &&
1655 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1656 break; /* OK */
1657 }
1658 return GL_INVALID_OPERATION;
1659
1660 case GL_UNSIGNED_SHORT_4_4_4_4:
1661 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1662 case GL_UNSIGNED_INT_8_8_8_8:
1663 case GL_UNSIGNED_INT_8_8_8_8_REV:
1664 if (format == GL_RGBA ||
1665 format == GL_BGRA ||
1666 format == GL_ABGR_EXT) {
1667 break; /* OK */
1668 }
1669 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1670 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1671 break; /* OK */
1672 }
1673 return GL_INVALID_OPERATION;
1674
1675 case GL_UNSIGNED_SHORT_5_5_5_1:
1676 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1677 case GL_UNSIGNED_INT_10_10_10_2:
1678 case GL_UNSIGNED_INT_2_10_10_10_REV:
1679 if (format == GL_RGBA ||
1680 format == GL_BGRA) {
1681 break; /* OK */
1682 }
1683 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1684 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1685 break; /* OK */
1686 }
1687 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1688 ctx->API == API_OPENGLES2) {
1689 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1690 }
1691 return GL_INVALID_OPERATION;
1692
1693 case GL_UNSIGNED_INT_24_8:
1694 if (format != GL_DEPTH_STENCIL) {
1695 return GL_INVALID_OPERATION;
1696 }
1697 return GL_NO_ERROR;
1698
1699 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1700 if (!ctx->Extensions.ARB_depth_buffer_float) {
1701 return GL_INVALID_ENUM;
1702 }
1703 if (format != GL_DEPTH_STENCIL) {
1704 return GL_INVALID_OPERATION;
1705 }
1706 return GL_NO_ERROR;
1707
1708 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1709 if (!ctx->Extensions.EXT_packed_float) {
1710 return GL_INVALID_ENUM;
1711 }
1712 if (format != GL_RGB) {
1713 return GL_INVALID_OPERATION;
1714 }
1715 return GL_NO_ERROR;
1716
1717 case GL_HALF_FLOAT_OES:
1718 switch (format) {
1719 case GL_RGBA:
1720 case GL_RGB:
1721 case GL_LUMINANCE_ALPHA:
1722 case GL_LUMINANCE:
1723 case GL_ALPHA:
1724 return GL_NO_ERROR;
1725 case GL_RG:
1726 case GL_RED:
1727 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1728 return GL_NO_ERROR;
1729 default:
1730 return GL_INVALID_OPERATION;
1731 }
1732
1733 default:
1734 ; /* fall-through */
1735 }
1736
1737 /* now, for each format, check the type for compatibility */
1738 switch (format) {
1739 case GL_COLOR_INDEX:
1740 case GL_STENCIL_INDEX:
1741 switch (type) {
1742 case GL_BITMAP:
1743 case GL_BYTE:
1744 case GL_UNSIGNED_BYTE:
1745 case GL_SHORT:
1746 case GL_UNSIGNED_SHORT:
1747 case GL_INT:
1748 case GL_UNSIGNED_INT:
1749 case GL_FLOAT:
1750 case GL_HALF_FLOAT:
1751 return GL_NO_ERROR;
1752 default:
1753 return GL_INVALID_ENUM;
1754 }
1755
1756 case GL_RED:
1757 case GL_GREEN:
1758 case GL_BLUE:
1759 case GL_ALPHA:
1760 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1761 case GL_INTENSITY:
1762 #endif
1763 case GL_LUMINANCE:
1764 case GL_LUMINANCE_ALPHA:
1765 case GL_DEPTH_COMPONENT:
1766 switch (type) {
1767 case GL_BYTE:
1768 case GL_UNSIGNED_BYTE:
1769 case GL_SHORT:
1770 case GL_UNSIGNED_SHORT:
1771 case GL_INT:
1772 case GL_UNSIGNED_INT:
1773 case GL_FLOAT:
1774 case GL_HALF_FLOAT:
1775 return GL_NO_ERROR;
1776 default:
1777 return GL_INVALID_ENUM;
1778 }
1779
1780 case GL_RG:
1781 if (!ctx->Extensions.ARB_texture_rg)
1782 return GL_INVALID_ENUM;
1783 switch (type) {
1784 case GL_BYTE:
1785 case GL_UNSIGNED_BYTE:
1786 case GL_SHORT:
1787 case GL_UNSIGNED_SHORT:
1788 case GL_INT:
1789 case GL_UNSIGNED_INT:
1790 case GL_FLOAT:
1791 case GL_HALF_FLOAT:
1792 return GL_NO_ERROR;
1793 default:
1794 return GL_INVALID_ENUM;
1795 }
1796
1797 case GL_RGB:
1798 switch (type) {
1799 case GL_BYTE:
1800 case GL_UNSIGNED_BYTE:
1801 case GL_SHORT:
1802 case GL_UNSIGNED_SHORT:
1803 case GL_INT:
1804 case GL_UNSIGNED_INT:
1805 case GL_FLOAT:
1806 case GL_UNSIGNED_BYTE_3_3_2:
1807 case GL_UNSIGNED_BYTE_2_3_3_REV:
1808 case GL_UNSIGNED_SHORT_5_6_5:
1809 case GL_UNSIGNED_SHORT_5_6_5_REV:
1810 case GL_HALF_FLOAT:
1811 return GL_NO_ERROR;
1812 case GL_UNSIGNED_INT_2_10_10_10_REV:
1813 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1814 return (ctx->API == API_OPENGLES2)
1815 ? GL_NO_ERROR : GL_INVALID_ENUM;
1816 case GL_UNSIGNED_INT_5_9_9_9_REV:
1817 return ctx->Extensions.EXT_texture_shared_exponent
1818 ? GL_NO_ERROR : GL_INVALID_ENUM;
1819 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1820 return ctx->Extensions.EXT_packed_float
1821 ? GL_NO_ERROR : GL_INVALID_ENUM;
1822 default:
1823 return GL_INVALID_ENUM;
1824 }
1825
1826 case GL_BGR:
1827 switch (type) {
1828 /* NOTE: no packed types are supported with BGR. That's
1829 * intentional, according to the GL spec.
1830 */
1831 case GL_BYTE:
1832 case GL_UNSIGNED_BYTE:
1833 case GL_SHORT:
1834 case GL_UNSIGNED_SHORT:
1835 case GL_INT:
1836 case GL_UNSIGNED_INT:
1837 case GL_FLOAT:
1838 case GL_HALF_FLOAT:
1839 return GL_NO_ERROR;
1840 default:
1841 return GL_INVALID_ENUM;
1842 }
1843
1844 case GL_RGBA:
1845 case GL_BGRA:
1846 switch (type) {
1847 case GL_BYTE:
1848 case GL_UNSIGNED_BYTE:
1849 case GL_SHORT:
1850 case GL_UNSIGNED_SHORT:
1851 case GL_INT:
1852 case GL_UNSIGNED_INT:
1853 case GL_FLOAT:
1854 case GL_UNSIGNED_SHORT_4_4_4_4:
1855 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1856 case GL_UNSIGNED_SHORT_5_5_5_1:
1857 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1858 case GL_UNSIGNED_INT_8_8_8_8:
1859 case GL_UNSIGNED_INT_8_8_8_8_REV:
1860 case GL_UNSIGNED_INT_10_10_10_2:
1861 case GL_UNSIGNED_INT_2_10_10_10_REV:
1862 case GL_HALF_FLOAT:
1863 return GL_NO_ERROR;
1864 default:
1865 return GL_INVALID_ENUM;
1866 }
1867
1868 case GL_ABGR_EXT:
1869 switch (type) {
1870 case GL_BYTE:
1871 case GL_UNSIGNED_BYTE:
1872 case GL_SHORT:
1873 case GL_UNSIGNED_SHORT:
1874 case GL_INT:
1875 case GL_UNSIGNED_INT:
1876 case GL_FLOAT:
1877 case GL_UNSIGNED_SHORT_4_4_4_4:
1878 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1879 case GL_UNSIGNED_INT_8_8_8_8:
1880 case GL_UNSIGNED_INT_8_8_8_8_REV:
1881 case GL_HALF_FLOAT:
1882 return GL_NO_ERROR;
1883 default:
1884 return GL_INVALID_ENUM;
1885 }
1886
1887 case GL_YCBCR_MESA:
1888 if (!ctx->Extensions.MESA_ycbcr_texture)
1889 return GL_INVALID_ENUM;
1890 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
1891 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
1892 return GL_NO_ERROR;
1893 else
1894 return GL_INVALID_OPERATION;
1895
1896 case GL_DEPTH_STENCIL:
1897 if (type == GL_UNSIGNED_INT_24_8)
1898 return GL_NO_ERROR;
1899 else if (ctx->Extensions.ARB_depth_buffer_float &&
1900 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1901 return GL_NO_ERROR;
1902 else
1903 return GL_INVALID_ENUM;
1904
1905 /* integer-valued formats */
1906 case GL_RED_INTEGER_EXT:
1907 case GL_GREEN_INTEGER_EXT:
1908 case GL_BLUE_INTEGER_EXT:
1909 case GL_ALPHA_INTEGER_EXT:
1910 case GL_RG_INTEGER:
1911 switch (type) {
1912 case GL_BYTE:
1913 case GL_UNSIGNED_BYTE:
1914 case GL_SHORT:
1915 case GL_UNSIGNED_SHORT:
1916 case GL_INT:
1917 case GL_UNSIGNED_INT:
1918 return (ctx->Version >= 30 ||
1919 ctx->Extensions.EXT_texture_integer)
1920 ? GL_NO_ERROR : GL_INVALID_ENUM;
1921 default:
1922 return GL_INVALID_ENUM;
1923 }
1924
1925 case GL_RGB_INTEGER_EXT:
1926 switch (type) {
1927 case GL_BYTE:
1928 case GL_UNSIGNED_BYTE:
1929 case GL_SHORT:
1930 case GL_UNSIGNED_SHORT:
1931 case GL_INT:
1932 case GL_UNSIGNED_INT:
1933 return (ctx->Version >= 30 ||
1934 ctx->Extensions.EXT_texture_integer)
1935 ? GL_NO_ERROR : GL_INVALID_ENUM;
1936 case GL_UNSIGNED_BYTE_3_3_2:
1937 case GL_UNSIGNED_BYTE_2_3_3_REV:
1938 case GL_UNSIGNED_SHORT_5_6_5:
1939 case GL_UNSIGNED_SHORT_5_6_5_REV:
1940 return ctx->Extensions.ARB_texture_rgb10_a2ui
1941 ? GL_NO_ERROR : GL_INVALID_ENUM;
1942 default:
1943 return GL_INVALID_ENUM;
1944 }
1945
1946 case GL_BGR_INTEGER_EXT:
1947 switch (type) {
1948 case GL_BYTE:
1949 case GL_UNSIGNED_BYTE:
1950 case GL_SHORT:
1951 case GL_UNSIGNED_SHORT:
1952 case GL_INT:
1953 case GL_UNSIGNED_INT:
1954 /* NOTE: no packed formats w/ BGR format */
1955 return (ctx->Version >= 30 ||
1956 ctx->Extensions.EXT_texture_integer)
1957 ? GL_NO_ERROR : GL_INVALID_ENUM;
1958 default:
1959 return GL_INVALID_ENUM;
1960 }
1961
1962 case GL_RGBA_INTEGER_EXT:
1963 case GL_BGRA_INTEGER_EXT:
1964 switch (type) {
1965 case GL_BYTE:
1966 case GL_UNSIGNED_BYTE:
1967 case GL_SHORT:
1968 case GL_UNSIGNED_SHORT:
1969 case GL_INT:
1970 case GL_UNSIGNED_INT:
1971 return (ctx->Version >= 30 ||
1972 ctx->Extensions.EXT_texture_integer)
1973 ? GL_NO_ERROR : GL_INVALID_ENUM;
1974 case GL_UNSIGNED_SHORT_4_4_4_4:
1975 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1976 case GL_UNSIGNED_SHORT_5_5_5_1:
1977 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1978 case GL_UNSIGNED_INT_8_8_8_8:
1979 case GL_UNSIGNED_INT_8_8_8_8_REV:
1980 case GL_UNSIGNED_INT_10_10_10_2:
1981 case GL_UNSIGNED_INT_2_10_10_10_REV:
1982 return ctx->Extensions.ARB_texture_rgb10_a2ui
1983 ? GL_NO_ERROR : GL_INVALID_ENUM;
1984 default:
1985 return GL_INVALID_ENUM;
1986 }
1987
1988 case GL_LUMINANCE_INTEGER_EXT:
1989 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1990 switch (type) {
1991 case GL_BYTE:
1992 case GL_UNSIGNED_BYTE:
1993 case GL_SHORT:
1994 case GL_UNSIGNED_SHORT:
1995 case GL_INT:
1996 case GL_UNSIGNED_INT:
1997 return ctx->Extensions.EXT_texture_integer
1998 ? GL_NO_ERROR : GL_INVALID_ENUM;
1999 default:
2000 return GL_INVALID_ENUM;
2001 }
2002
2003 default:
2004 return GL_INVALID_ENUM;
2005 }
2006 return GL_NO_ERROR;
2007 }
2008
2009
2010 /**
2011 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2012 * and glTex[Sub]Image.
2013 * \return error code, or GL_NO_ERROR.
2014 */
2015 GLenum
2016 _mesa_es_error_check_format_and_type(GLenum format, GLenum type,
2017 unsigned dimensions)
2018 {
2019 GLboolean type_valid = GL_TRUE;
2020
2021 switch (format) {
2022 case GL_ALPHA:
2023 case GL_LUMINANCE:
2024 case GL_LUMINANCE_ALPHA:
2025 type_valid = (type == GL_UNSIGNED_BYTE
2026 || type == GL_FLOAT
2027 || type == GL_HALF_FLOAT_OES);
2028 break;
2029
2030 case GL_RGB:
2031 type_valid = (type == GL_UNSIGNED_BYTE
2032 || type == GL_UNSIGNED_SHORT_5_6_5
2033 || type == GL_FLOAT
2034 || type == GL_HALF_FLOAT_OES);
2035 break;
2036
2037 case GL_RGBA:
2038 type_valid = (type == GL_UNSIGNED_BYTE
2039 || type == GL_UNSIGNED_SHORT_4_4_4_4
2040 || type == GL_UNSIGNED_SHORT_5_5_5_1
2041 || type == GL_FLOAT
2042 || type == GL_HALF_FLOAT_OES
2043 || type == GL_UNSIGNED_INT_2_10_10_10_REV);
2044 break;
2045
2046 case GL_DEPTH_COMPONENT:
2047 /* This format is filtered against invalid dimensionalities elsewhere.
2048 */
2049 type_valid = (type == GL_UNSIGNED_SHORT
2050 || type == GL_UNSIGNED_INT);
2051 break;
2052
2053 case GL_DEPTH_STENCIL:
2054 /* This format is filtered against invalid dimensionalities elsewhere.
2055 */
2056 type_valid = (type == GL_UNSIGNED_INT_24_8);
2057 break;
2058
2059 case GL_BGRA_EXT:
2060 type_valid = (type == GL_UNSIGNED_BYTE);
2061
2062 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2063 * the format does not appear to be allowed for 3D textures in OpenGL
2064 * ES.
2065 */
2066 if (dimensions != 2)
2067 return GL_INVALID_VALUE;
2068
2069 break;
2070
2071 default:
2072 return GL_INVALID_VALUE;
2073 }
2074
2075 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2076 }
2077
2078
2079 /**
2080 * Do error checking of format/type combinations for OpenGL ES 3
2081 * glTex[Sub]Image.
2082 * \return error code, or GL_NO_ERROR.
2083 */
2084 GLenum
2085 _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
2086 GLenum format, GLenum type,
2087 GLenum internalFormat)
2088 {
2089 switch (format) {
2090 case GL_RGBA:
2091 switch (type) {
2092 case GL_UNSIGNED_BYTE:
2093 switch (internalFormat) {
2094 case GL_RGBA:
2095 case GL_RGBA8:
2096 case GL_RGB5_A1:
2097 case GL_RGBA4:
2098 case GL_SRGB8_ALPHA8_EXT:
2099 break;
2100 default:
2101 return GL_INVALID_OPERATION;
2102 }
2103 break;
2104
2105 case GL_BYTE:
2106 if (internalFormat != GL_RGBA8_SNORM)
2107 return GL_INVALID_OPERATION;
2108 break;
2109
2110 case GL_UNSIGNED_SHORT_4_4_4_4:
2111 switch (internalFormat) {
2112 case GL_RGBA:
2113 case GL_RGBA4:
2114 break;
2115 default:
2116 return GL_INVALID_OPERATION;
2117 }
2118 break;
2119
2120 case GL_UNSIGNED_SHORT_5_5_5_1:
2121 switch (internalFormat) {
2122 case GL_RGBA:
2123 case GL_RGB5_A1:
2124 break;
2125 default:
2126 return GL_INVALID_OPERATION;
2127 }
2128 break;
2129
2130 case GL_UNSIGNED_INT_2_10_10_10_REV:
2131 switch (internalFormat) {
2132 case GL_RGBA: /* GL_EXT_texture_type_2_10_10_10_REV */
2133 case GL_RGB10_A2:
2134 case GL_RGB5_A1:
2135 break;
2136 default:
2137 return GL_INVALID_OPERATION;
2138 }
2139 break;
2140
2141 case GL_HALF_FLOAT:
2142 if (internalFormat != GL_RGBA16F)
2143 return GL_INVALID_OPERATION;
2144 break;
2145
2146 case GL_FLOAT:
2147 switch (internalFormat) {
2148 case GL_RGBA16F:
2149 case GL_RGBA32F:
2150 break;
2151 case GL_RGBA:
2152 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2153 break;
2154 default:
2155 return GL_INVALID_OPERATION;
2156 }
2157 break;
2158
2159 case GL_HALF_FLOAT_OES:
2160 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2161 break;
2162 default:
2163 return GL_INVALID_OPERATION;
2164 }
2165 break;
2166
2167 case GL_RGBA_INTEGER:
2168 switch (type) {
2169 case GL_UNSIGNED_BYTE:
2170 if (internalFormat != GL_RGBA8UI)
2171 return GL_INVALID_OPERATION;
2172 break;
2173
2174 case GL_BYTE:
2175 if (internalFormat != GL_RGBA8I)
2176 return GL_INVALID_OPERATION;
2177 break;
2178
2179 case GL_UNSIGNED_SHORT:
2180 if (internalFormat != GL_RGBA16UI)
2181 return GL_INVALID_OPERATION;
2182 break;
2183
2184 case GL_SHORT:
2185 if (internalFormat != GL_RGBA16I)
2186 return GL_INVALID_OPERATION;
2187 break;
2188
2189 case GL_UNSIGNED_INT:
2190 if (internalFormat != GL_RGBA32UI)
2191 return GL_INVALID_OPERATION;
2192 break;
2193
2194 case GL_INT:
2195 if (internalFormat != GL_RGBA32I)
2196 return GL_INVALID_OPERATION;
2197 break;
2198
2199 case GL_UNSIGNED_INT_2_10_10_10_REV:
2200 if (internalFormat != GL_RGB10_A2UI)
2201 return GL_INVALID_OPERATION;
2202 break;
2203
2204 default:
2205 return GL_INVALID_OPERATION;
2206 }
2207 break;
2208
2209 case GL_RGB:
2210 switch (type) {
2211 case GL_UNSIGNED_BYTE:
2212 switch (internalFormat) {
2213 case GL_RGB:
2214 case GL_RGB8:
2215 case GL_RGB565:
2216 case GL_SRGB8:
2217 break;
2218 default:
2219 return GL_INVALID_OPERATION;
2220 }
2221 break;
2222
2223 case GL_BYTE:
2224 if (internalFormat != GL_RGB8_SNORM)
2225 return GL_INVALID_OPERATION;
2226 break;
2227
2228 case GL_UNSIGNED_SHORT_5_6_5:
2229 switch (internalFormat) {
2230 case GL_RGB:
2231 case GL_RGB565:
2232 break;
2233 default:
2234 return GL_INVALID_OPERATION;
2235 }
2236 break;
2237
2238 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2239 if (internalFormat != GL_R11F_G11F_B10F)
2240 return GL_INVALID_OPERATION;
2241 break;
2242
2243 case GL_UNSIGNED_INT_5_9_9_9_REV:
2244 if (internalFormat != GL_RGB9_E5)
2245 return GL_INVALID_OPERATION;
2246 break;
2247
2248 case GL_HALF_FLOAT:
2249 switch (internalFormat) {
2250 case GL_RGB16F:
2251 case GL_R11F_G11F_B10F:
2252 case GL_RGB9_E5:
2253 break;
2254 default:
2255 return GL_INVALID_OPERATION;
2256 }
2257 break;
2258
2259 case GL_FLOAT:
2260 switch (internalFormat) {
2261 case GL_RGB16F:
2262 case GL_RGB32F:
2263 case GL_R11F_G11F_B10F:
2264 case GL_RGB9_E5:
2265 break;
2266 case GL_RGB:
2267 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2268 break;
2269 default:
2270 return GL_INVALID_OPERATION;
2271 }
2272 break;
2273
2274 case GL_HALF_FLOAT_OES:
2275 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
2276 return GL_INVALID_OPERATION;
2277 break;
2278
2279 case GL_UNSIGNED_INT_2_10_10_10_REV:
2280 switch (internalFormat) {
2281 case GL_RGB: /* GL_EXT_texture_type_2_10_10_10_REV */
2282 break;
2283 default:
2284 return GL_INVALID_OPERATION;
2285 }
2286 break;
2287
2288 default:
2289 return GL_INVALID_OPERATION;
2290 }
2291 break;
2292
2293 case GL_RGB_INTEGER:
2294 switch (type) {
2295 case GL_UNSIGNED_BYTE:
2296 if (internalFormat != GL_RGB8UI)
2297 return GL_INVALID_OPERATION;
2298 break;
2299
2300 case GL_BYTE:
2301 if (internalFormat != GL_RGB8I)
2302 return GL_INVALID_OPERATION;
2303 break;
2304
2305 case GL_UNSIGNED_SHORT:
2306 if (internalFormat != GL_RGB16UI)
2307 return GL_INVALID_OPERATION;
2308 break;
2309
2310 case GL_SHORT:
2311 if (internalFormat != GL_RGB16I)
2312 return GL_INVALID_OPERATION;
2313 break;
2314
2315 case GL_UNSIGNED_INT:
2316 if (internalFormat != GL_RGB32UI)
2317 return GL_INVALID_OPERATION;
2318 break;
2319
2320 case GL_INT:
2321 if (internalFormat != GL_RGB32I)
2322 return GL_INVALID_OPERATION;
2323 break;
2324
2325 default:
2326 return GL_INVALID_OPERATION;
2327 }
2328 break;
2329
2330 case GL_RG:
2331 switch (type) {
2332 case GL_UNSIGNED_BYTE:
2333 if (internalFormat != GL_RG8)
2334 return GL_INVALID_OPERATION;
2335 break;
2336
2337 case GL_BYTE:
2338 if (internalFormat != GL_RG8_SNORM)
2339 return GL_INVALID_OPERATION;
2340 break;
2341
2342 case GL_HALF_FLOAT:
2343 case GL_HALF_FLOAT_OES:
2344 switch (internalFormat) {
2345 case GL_RG16F:
2346 break;
2347 case GL_RG:
2348 if (ctx->Extensions.ARB_texture_rg &&
2349 ctx->Extensions.OES_texture_half_float)
2350 break;
2351 /* fallthrough */
2352 default:
2353 return GL_INVALID_OPERATION;
2354 }
2355 break;
2356
2357 case GL_FLOAT:
2358 switch (internalFormat) {
2359 case GL_RG16F:
2360 case GL_RG32F:
2361 break;
2362 case GL_RG:
2363 if (ctx->Extensions.ARB_texture_rg &&
2364 ctx->Extensions.OES_texture_float)
2365 break;
2366 /* fallthrough */
2367 default:
2368 return GL_INVALID_OPERATION;
2369 }
2370 break;
2371
2372 default:
2373 return GL_INVALID_OPERATION;
2374 }
2375 break;
2376
2377 case GL_RG_INTEGER:
2378 switch (type) {
2379 case GL_UNSIGNED_BYTE:
2380 if (internalFormat != GL_RG8UI)
2381 return GL_INVALID_OPERATION;
2382 break;
2383
2384 case GL_BYTE:
2385 if (internalFormat != GL_RG8I)
2386 return GL_INVALID_OPERATION;
2387 break;
2388
2389 case GL_UNSIGNED_SHORT:
2390 if (internalFormat != GL_RG16UI)
2391 return GL_INVALID_OPERATION;
2392 break;
2393
2394 case GL_SHORT:
2395 if (internalFormat != GL_RG16I)
2396 return GL_INVALID_OPERATION;
2397 break;
2398
2399 case GL_UNSIGNED_INT:
2400 if (internalFormat != GL_RG32UI)
2401 return GL_INVALID_OPERATION;
2402 break;
2403
2404 case GL_INT:
2405 if (internalFormat != GL_RG32I)
2406 return GL_INVALID_OPERATION;
2407 break;
2408
2409 default:
2410 return GL_INVALID_OPERATION;
2411 }
2412 break;
2413
2414 case GL_RED:
2415 switch (type) {
2416 case GL_UNSIGNED_BYTE:
2417 if (internalFormat != GL_R8)
2418 return GL_INVALID_OPERATION;
2419 break;
2420
2421 case GL_BYTE:
2422 if (internalFormat != GL_R8_SNORM)
2423 return GL_INVALID_OPERATION;
2424 break;
2425
2426 case GL_HALF_FLOAT:
2427 case GL_HALF_FLOAT_OES:
2428 switch (internalFormat) {
2429 case GL_R16F:
2430 break;
2431 case GL_RG:
2432 case GL_RED:
2433 if (ctx->Extensions.ARB_texture_rg &&
2434 ctx->Extensions.OES_texture_half_float)
2435 break;
2436 /* fallthrough */
2437 default:
2438 return GL_INVALID_OPERATION;
2439 }
2440 break;
2441
2442 case GL_FLOAT:
2443 switch (internalFormat) {
2444 case GL_R16F:
2445 case GL_R32F:
2446 break;
2447 case GL_RED:
2448 if (ctx->Extensions.ARB_texture_rg &&
2449 ctx->Extensions.OES_texture_float)
2450 break;
2451 /* fallthrough */
2452 default:
2453 return GL_INVALID_OPERATION;
2454 }
2455 break;
2456
2457 default:
2458 return GL_INVALID_OPERATION;
2459 }
2460 break;
2461
2462 case GL_RED_INTEGER:
2463 switch (type) {
2464 case GL_UNSIGNED_BYTE:
2465 if (internalFormat != GL_R8UI)
2466 return GL_INVALID_OPERATION;
2467 break;
2468
2469 case GL_BYTE:
2470 if (internalFormat != GL_R8I)
2471 return GL_INVALID_OPERATION;
2472 break;
2473
2474 case GL_UNSIGNED_SHORT:
2475 if (internalFormat != GL_R16UI)
2476 return GL_INVALID_OPERATION;
2477 break;
2478
2479 case GL_SHORT:
2480 if (internalFormat != GL_R16I)
2481 return GL_INVALID_OPERATION;
2482 break;
2483
2484 case GL_UNSIGNED_INT:
2485 if (internalFormat != GL_R32UI)
2486 return GL_INVALID_OPERATION;
2487 break;
2488
2489 case GL_INT:
2490 if (internalFormat != GL_R32I)
2491 return GL_INVALID_OPERATION;
2492 break;
2493
2494 default:
2495 return GL_INVALID_OPERATION;
2496 }
2497 break;
2498
2499 case GL_DEPTH_COMPONENT:
2500 switch (type) {
2501 case GL_UNSIGNED_SHORT:
2502 if (internalFormat != GL_DEPTH_COMPONENT
2503 && internalFormat != GL_DEPTH_COMPONENT16)
2504 return GL_INVALID_OPERATION;
2505 break;
2506
2507 case GL_UNSIGNED_INT:
2508 switch (internalFormat) {
2509 case GL_DEPTH_COMPONENT:
2510 case GL_DEPTH_COMPONENT16:
2511 case GL_DEPTH_COMPONENT24:
2512 break;
2513 default:
2514 return GL_INVALID_OPERATION;
2515 }
2516 break;
2517
2518 case GL_FLOAT:
2519 if (internalFormat != GL_DEPTH_COMPONENT32F)
2520 return GL_INVALID_OPERATION;
2521 break;
2522
2523 default:
2524 return GL_INVALID_OPERATION;
2525 }
2526 break;
2527
2528 case GL_DEPTH_STENCIL:
2529 switch (type) {
2530 case GL_UNSIGNED_INT_24_8:
2531 if (internalFormat != GL_DEPTH_STENCIL
2532 && internalFormat != GL_DEPTH24_STENCIL8)
2533 return GL_INVALID_OPERATION;
2534 break;
2535
2536 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2537 if (internalFormat != GL_DEPTH32F_STENCIL8)
2538 return GL_INVALID_OPERATION;
2539 break;
2540
2541 default:
2542 return GL_INVALID_OPERATION;
2543 }
2544 break;
2545
2546 case GL_ALPHA:
2547 case GL_LUMINANCE:
2548 case GL_LUMINANCE_ALPHA:
2549 switch (type) {
2550 case GL_FLOAT:
2551 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2552 break;
2553 case GL_HALF_FLOAT_OES:
2554 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2555 break;
2556 default:
2557 if (type != GL_UNSIGNED_BYTE || format != internalFormat)
2558 return GL_INVALID_OPERATION;
2559 }
2560 }
2561
2562 return GL_NO_ERROR;
2563 }
2564
2565 static void
2566 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
2567 {
2568 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
2569 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
2570 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
2571 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
2572 }
2573
2574 static bool
2575 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
2576 {
2577 switch (format) {
2578 case GL_RGBA:
2579 case GL_RGBA_INTEGER_EXT:
2580 set_swizzle(swizzle, 0, 1, 2, 3);
2581 return true;
2582 case GL_BGRA:
2583 case GL_BGRA_INTEGER_EXT:
2584 set_swizzle(swizzle, 2, 1, 0, 3);
2585 return true;
2586 case GL_ABGR_EXT:
2587 set_swizzle(swizzle, 3, 2, 1, 0);
2588 return true;
2589 case GL_RGB:
2590 case GL_RGB_INTEGER_EXT:
2591 set_swizzle(swizzle, 0, 1, 2, 5);
2592 return true;
2593 case GL_BGR:
2594 case GL_BGR_INTEGER_EXT:
2595 set_swizzle(swizzle, 2, 1, 0, 5);
2596 return true;
2597 case GL_LUMINANCE_ALPHA:
2598 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2599 set_swizzle(swizzle, 0, 0, 0, 1);
2600 return true;
2601 case GL_RG:
2602 case GL_RG_INTEGER:
2603 set_swizzle(swizzle, 0, 1, 4, 5);
2604 return true;
2605 case GL_RED:
2606 case GL_RED_INTEGER_EXT:
2607 set_swizzle(swizzle, 0, 4, 4, 5);
2608 return true;
2609 case GL_GREEN:
2610 case GL_GREEN_INTEGER_EXT:
2611 set_swizzle(swizzle, 4, 0, 4, 5);
2612 return true;
2613 case GL_BLUE:
2614 case GL_BLUE_INTEGER_EXT:
2615 set_swizzle(swizzle, 4, 4, 0, 5);
2616 return true;
2617 case GL_ALPHA:
2618 case GL_ALPHA_INTEGER_EXT:
2619 set_swizzle(swizzle, 4, 4, 4, 0);
2620 return true;
2621 case GL_LUMINANCE:
2622 case GL_LUMINANCE_INTEGER_EXT:
2623 set_swizzle(swizzle, 0, 0, 0, 5);
2624 return true;
2625 case GL_INTENSITY:
2626 set_swizzle(swizzle, 0, 0, 0, 0);
2627 return true;
2628 default:
2629 return false;
2630 }
2631 }
2632
2633 /**
2634 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
2635 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
2636 * otherwise (for non-array formats).
2637 *
2638 * This function will typically be used to compute a mesa format from a GL type
2639 * so we can then call _mesa_format_convert. This function does
2640 * not consider byte swapping, so it returns types assuming that no byte
2641 * swapping is involved. If byte swapping is involved then clients are supposed
2642 * to handle that on their side before calling _mesa_format_convert.
2643 *
2644 * This function returns an uint32_t that can pack a mesa_format or a
2645 * mesa_array_format. Clients must check the mesa array format bit
2646 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
2647 * format is a mesa_array_format or a mesa_format.
2648 */
2649 uint32_t
2650 _mesa_format_from_format_and_type(GLenum format, GLenum type)
2651 {
2652 mesa_array_format array_format;
2653
2654 bool is_array_format = true;
2655 uint8_t swizzle[4];
2656 bool normalized = false, is_float = false, is_signed = false;
2657 int num_channels = 0, type_size = 0;
2658
2659 /* Extract array format type information from the OpenGL data type */
2660 switch (type) {
2661 case GL_UNSIGNED_BYTE:
2662 type_size = 1;
2663 break;
2664 case GL_BYTE:
2665 type_size = 1;
2666 is_signed = true;
2667 break;
2668 case GL_UNSIGNED_SHORT:
2669 type_size = 2;
2670 break;
2671 case GL_SHORT:
2672 type_size = 2;
2673 is_signed = true;
2674 break;
2675 case GL_UNSIGNED_INT:
2676 type_size = 4;
2677 break;
2678 case GL_INT:
2679 type_size = 4;
2680 is_signed = true;
2681 break;
2682 case GL_HALF_FLOAT:
2683 case GL_HALF_FLOAT_OES:
2684 type_size = 2;
2685 is_signed = true;
2686 is_float = true;
2687 break;
2688 case GL_FLOAT:
2689 type_size = 4;
2690 is_signed = true;
2691 is_float = true;
2692 break;
2693 default:
2694 is_array_format = false;
2695 break;
2696 }
2697
2698 /* Extract array format swizzle information from the OpenGL format */
2699 if (is_array_format)
2700 is_array_format = get_swizzle_from_gl_format(format, swizzle);
2701
2702 /* If this is an array format type after checking data type and format,
2703 * create the array format
2704 */
2705 if (is_array_format) {
2706 normalized = !_mesa_is_enum_format_integer(format);
2707 num_channels = _mesa_components_in_format(format);
2708
2709 array_format =
2710 MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
2711 normalized, num_channels,
2712 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
2713
2714 if (!_mesa_little_endian())
2715 array_format = _mesa_array_format_flip_channels(array_format);
2716
2717 return array_format;
2718 }
2719
2720 /* Otherwise this is not an array format, so return the mesa_format
2721 * matching the OpenGL format and data type
2722 */
2723 switch (type) {
2724 case GL_UNSIGNED_SHORT_5_6_5:
2725 if (format == GL_RGB)
2726 return MESA_FORMAT_B5G6R5_UNORM;
2727 else if (format == GL_BGR)
2728 return MESA_FORMAT_R5G6B5_UNORM;
2729 break;
2730 case GL_UNSIGNED_SHORT_5_6_5_REV:
2731 if (format == GL_RGB)
2732 return MESA_FORMAT_R5G6B5_UNORM;
2733 else if (format == GL_BGR)
2734 return MESA_FORMAT_B5G6R5_UNORM;
2735 break;
2736 case GL_UNSIGNED_SHORT_4_4_4_4:
2737 if (format == GL_RGBA)
2738 return MESA_FORMAT_A4B4G4R4_UNORM;
2739 else if (format == GL_BGRA)
2740 return MESA_FORMAT_A4R4G4B4_UNORM;
2741 else if (format == GL_ABGR_EXT)
2742 return MESA_FORMAT_R4G4B4A4_UNORM;
2743 break;
2744 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2745 if (format == GL_RGBA)
2746 return MESA_FORMAT_R4G4B4A4_UNORM;
2747 else if (format == GL_BGRA)
2748 return MESA_FORMAT_B4G4R4A4_UNORM;
2749 else if (format == GL_ABGR_EXT)
2750 return MESA_FORMAT_A4B4G4R4_UNORM;
2751 break;
2752 case GL_UNSIGNED_SHORT_5_5_5_1:
2753 if (format == GL_RGBA)
2754 return MESA_FORMAT_A1B5G5R5_UNORM;
2755 else if (format == GL_BGRA)
2756 return MESA_FORMAT_A1R5G5B5_UNORM;
2757 break;
2758 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2759 if (format == GL_RGBA)
2760 return MESA_FORMAT_R5G5B5A1_UNORM;
2761 else if (format == GL_BGRA)
2762 return MESA_FORMAT_B5G5R5A1_UNORM;
2763 break;
2764 case GL_UNSIGNED_BYTE_3_3_2:
2765 if (format == GL_RGB)
2766 return MESA_FORMAT_B2G3R3_UNORM;
2767 break;
2768 case GL_UNSIGNED_BYTE_2_3_3_REV:
2769 if (format == GL_RGB)
2770 return MESA_FORMAT_R3G3B2_UNORM;
2771 break;
2772 case GL_UNSIGNED_INT_5_9_9_9_REV:
2773 if (format == GL_RGB)
2774 return MESA_FORMAT_R9G9B9E5_FLOAT;
2775 break;
2776 case GL_UNSIGNED_INT_10_10_10_2:
2777 if (format == GL_RGBA)
2778 return MESA_FORMAT_A2B10G10R10_UNORM;
2779 else if (format == GL_RGBA_INTEGER)
2780 return MESA_FORMAT_A2B10G10R10_UINT;
2781 else if (format == GL_BGRA)
2782 return MESA_FORMAT_A2R10G10B10_UNORM;
2783 else if (format == GL_BGRA_INTEGER)
2784 return MESA_FORMAT_A2R10G10B10_UINT;
2785 break;
2786 case GL_UNSIGNED_INT_2_10_10_10_REV:
2787 if (format == GL_RGB)
2788 return MESA_FORMAT_R10G10B10X2_UNORM;
2789 if (format == GL_RGBA)
2790 return MESA_FORMAT_R10G10B10A2_UNORM;
2791 else if (format == GL_RGBA_INTEGER)
2792 return MESA_FORMAT_R10G10B10A2_UINT;
2793 else if (format == GL_BGRA)
2794 return MESA_FORMAT_B10G10R10A2_UNORM;
2795 else if (format == GL_BGRA_INTEGER)
2796 return MESA_FORMAT_B10G10R10A2_UINT;
2797 break;
2798 case GL_UNSIGNED_INT_8_8_8_8:
2799 if (format == GL_RGBA)
2800 return MESA_FORMAT_A8B8G8R8_UNORM;
2801 else if (format == GL_BGRA)
2802 return MESA_FORMAT_A8R8G8B8_UNORM;
2803 else if (format == GL_ABGR_EXT)
2804 return MESA_FORMAT_R8G8B8A8_UNORM;
2805 break;
2806 case GL_UNSIGNED_INT_8_8_8_8_REV:
2807 if (format == GL_RGBA)
2808 return MESA_FORMAT_R8G8B8A8_UNORM;
2809 else if (format == GL_BGRA)
2810 return MESA_FORMAT_B8G8R8A8_UNORM;
2811 else if (format == GL_ABGR_EXT)
2812 return MESA_FORMAT_A8B8G8R8_UNORM;
2813 break;
2814 case GL_UNSIGNED_SHORT_8_8_MESA:
2815 if (format == GL_YCBCR_MESA)
2816 return MESA_FORMAT_YCBCR;
2817 break;
2818 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
2819 if (format == GL_YCBCR_MESA)
2820 return MESA_FORMAT_YCBCR_REV;
2821 break;
2822 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2823 if (format == GL_RGB)
2824 return MESA_FORMAT_R11G11B10_FLOAT;
2825 default:
2826 break;
2827 }
2828
2829 /* If we got here it means that we could not find a Mesa format that
2830 * matches the GL format/type provided. We may need to add a new Mesa
2831 * format in that case.
2832 */
2833 unreachable("Unsupported format");
2834 }