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mesa: Rename _mesa_lookup_enum_by_nr() to _mesa_enum_to_string().
[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 /**
1283 * Convert various base formats to the cooresponding integer format.
1284 */
1285 GLenum
1286 _mesa_base_format_to_integer_format(GLenum format)
1287 {
1288 switch(format) {
1289 case GL_RED:
1290 return GL_RED_INTEGER;
1291 case GL_GREEN:
1292 return GL_GREEN_INTEGER;
1293 case GL_BLUE:
1294 return GL_BLUE_INTEGER;
1295 case GL_RG:
1296 return GL_RG_INTEGER;
1297 case GL_RGB:
1298 return GL_RGB_INTEGER;
1299 case GL_RGBA:
1300 return GL_RGBA_INTEGER;
1301 case GL_BGR:
1302 return GL_BGR_INTEGER;
1303 case GL_BGRA:
1304 return GL_BGRA_INTEGER;
1305 case GL_ALPHA:
1306 return GL_ALPHA_INTEGER;
1307 case GL_LUMINANCE:
1308 return GL_LUMINANCE_INTEGER_EXT;
1309 case GL_LUMINANCE_ALPHA:
1310 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1311 }
1312
1313 return format;
1314 }
1315
1316
1317 /**
1318 * Does the given base texture/renderbuffer format have the channel
1319 * named by 'pname'?
1320 */
1321 GLboolean
1322 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1323 {
1324 switch (pname) {
1325 case GL_TEXTURE_RED_SIZE:
1326 case GL_TEXTURE_RED_TYPE:
1327 case GL_RENDERBUFFER_RED_SIZE_EXT:
1328 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1329 if (base_format == GL_RED ||
1330 base_format == GL_RG ||
1331 base_format == GL_RGB ||
1332 base_format == GL_RGBA) {
1333 return GL_TRUE;
1334 }
1335 return GL_FALSE;
1336 case GL_TEXTURE_GREEN_SIZE:
1337 case GL_TEXTURE_GREEN_TYPE:
1338 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1339 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1340 if (base_format == GL_RG ||
1341 base_format == GL_RGB ||
1342 base_format == GL_RGBA) {
1343 return GL_TRUE;
1344 }
1345 return GL_FALSE;
1346 case GL_TEXTURE_BLUE_SIZE:
1347 case GL_TEXTURE_BLUE_TYPE:
1348 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1349 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1350 if (base_format == GL_RGB ||
1351 base_format == GL_RGBA) {
1352 return GL_TRUE;
1353 }
1354 return GL_FALSE;
1355 case GL_TEXTURE_ALPHA_SIZE:
1356 case GL_TEXTURE_ALPHA_TYPE:
1357 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1358 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1359 if (base_format == GL_RGBA ||
1360 base_format == GL_ALPHA ||
1361 base_format == GL_LUMINANCE_ALPHA) {
1362 return GL_TRUE;
1363 }
1364 return GL_FALSE;
1365 case GL_TEXTURE_LUMINANCE_SIZE:
1366 case GL_TEXTURE_LUMINANCE_TYPE:
1367 if (base_format == GL_LUMINANCE ||
1368 base_format == GL_LUMINANCE_ALPHA) {
1369 return GL_TRUE;
1370 }
1371 return GL_FALSE;
1372 case GL_TEXTURE_INTENSITY_SIZE:
1373 case GL_TEXTURE_INTENSITY_TYPE:
1374 if (base_format == GL_INTENSITY) {
1375 return GL_TRUE;
1376 }
1377 return GL_FALSE;
1378 case GL_TEXTURE_DEPTH_SIZE:
1379 case GL_TEXTURE_DEPTH_TYPE:
1380 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1381 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1382 if (base_format == GL_DEPTH_STENCIL ||
1383 base_format == GL_DEPTH_COMPONENT) {
1384 return GL_TRUE;
1385 }
1386 return GL_FALSE;
1387 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1388 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1389 if (base_format == GL_DEPTH_STENCIL ||
1390 base_format == GL_STENCIL_INDEX) {
1391 return GL_TRUE;
1392 }
1393 return GL_FALSE;
1394 default:
1395 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1396 __func__, pname);
1397 return GL_FALSE;
1398 }
1399
1400 return GL_FALSE;
1401 }
1402
1403
1404 /**
1405 * Returns the number of channels/components for a base format.
1406 */
1407 GLint
1408 _mesa_base_format_component_count(GLenum base_format)
1409 {
1410 switch (base_format) {
1411 case GL_RED:
1412 case GL_ALPHA:
1413 case GL_INTENSITY:
1414 case GL_DEPTH_COMPONENT:
1415 return 1;
1416 case GL_RG:
1417 case GL_LUMINANCE_ALPHA:
1418 case GL_DEPTH_STENCIL:
1419 return 2;
1420 case GL_RGB:
1421 return 3;
1422 case GL_RGBA:
1423 return 4;
1424 default:
1425 return -1;
1426 }
1427 }
1428
1429
1430 /**
1431 * If format is a generic compressed format, return the corresponding
1432 * non-compressed format. For other formats, return the format as-is.
1433 */
1434 GLenum
1435 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1436 {
1437 switch (format) {
1438 case GL_COMPRESSED_RED:
1439 return GL_RED;
1440 case GL_COMPRESSED_RG:
1441 return GL_RG;
1442 case GL_COMPRESSED_RGB:
1443 return GL_RGB;
1444 case GL_COMPRESSED_RGBA:
1445 return GL_RGBA;
1446 case GL_COMPRESSED_ALPHA:
1447 return GL_ALPHA;
1448 case GL_COMPRESSED_LUMINANCE:
1449 return GL_LUMINANCE;
1450 case GL_COMPRESSED_LUMINANCE_ALPHA:
1451 return GL_LUMINANCE_ALPHA;
1452 case GL_COMPRESSED_INTENSITY:
1453 return GL_INTENSITY;
1454 /* sRGB formats */
1455 case GL_COMPRESSED_SRGB:
1456 return GL_SRGB;
1457 case GL_COMPRESSED_SRGB_ALPHA:
1458 return GL_SRGB_ALPHA;
1459 case GL_COMPRESSED_SLUMINANCE:
1460 return GL_SLUMINANCE;
1461 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1462 return GL_SLUMINANCE_ALPHA;
1463 default:
1464 return format;
1465 }
1466 }
1467
1468
1469 /**
1470 * Return the equivalent non-generic internal format.
1471 * This is useful for comparing whether two internal formats are equivalent.
1472 */
1473 GLenum
1474 _mesa_get_nongeneric_internalformat(GLenum format)
1475 {
1476 switch (format) {
1477 /* GL 1.1 formats. */
1478 case 4:
1479 case GL_RGBA:
1480 return GL_RGBA8;
1481 case 3:
1482 case GL_RGB:
1483 return GL_RGB8;
1484 case 2:
1485 case GL_LUMINANCE_ALPHA:
1486 return GL_LUMINANCE8_ALPHA8;
1487 case 1:
1488 case GL_LUMINANCE:
1489 return GL_LUMINANCE8;
1490 case GL_ALPHA:
1491 return GL_ALPHA8;
1492 case GL_INTENSITY:
1493 return GL_INTENSITY8;
1494
1495 /* GL_ARB_texture_rg */
1496 case GL_RED:
1497 return GL_R8;
1498 case GL_RG:
1499 return GL_RG8;
1500
1501 /* GL_EXT_texture_sRGB */
1502 case GL_SRGB:
1503 return GL_SRGB8;
1504 case GL_SRGB_ALPHA:
1505 return GL_SRGB8_ALPHA8;
1506 case GL_SLUMINANCE:
1507 return GL_SLUMINANCE8;
1508 case GL_SLUMINANCE_ALPHA:
1509 return GL_SLUMINANCE8_ALPHA8;
1510
1511 /* GL_EXT_texture_snorm */
1512 case GL_RGBA_SNORM:
1513 return GL_RGBA8_SNORM;
1514 case GL_RGB_SNORM:
1515 return GL_RGB8_SNORM;
1516 case GL_RG_SNORM:
1517 return GL_RG8_SNORM;
1518 case GL_RED_SNORM:
1519 return GL_R8_SNORM;
1520 case GL_LUMINANCE_ALPHA_SNORM:
1521 return GL_LUMINANCE8_ALPHA8_SNORM;
1522 case GL_LUMINANCE_SNORM:
1523 return GL_LUMINANCE8_SNORM;
1524 case GL_ALPHA_SNORM:
1525 return GL_ALPHA8_SNORM;
1526 case GL_INTENSITY_SNORM:
1527 return GL_INTENSITY8_SNORM;
1528
1529 default:
1530 return format;
1531 }
1532 }
1533
1534
1535 /**
1536 * Convert an sRGB internal format to linear.
1537 */
1538 GLenum
1539 _mesa_get_linear_internalformat(GLenum format)
1540 {
1541 switch (format) {
1542 case GL_SRGB:
1543 return GL_RGB;
1544 case GL_SRGB_ALPHA:
1545 return GL_RGBA;
1546 case GL_SRGB8:
1547 return GL_RGB8;
1548 case GL_SRGB8_ALPHA8:
1549 return GL_RGBA8;
1550 case GL_SLUMINANCE8:
1551 return GL_LUMINANCE8;
1552 case GL_SLUMINANCE:
1553 return GL_LUMINANCE;
1554 case GL_SLUMINANCE_ALPHA:
1555 return GL_LUMINANCE_ALPHA;
1556 case GL_SLUMINANCE8_ALPHA8:
1557 return GL_LUMINANCE8_ALPHA8;
1558 default:
1559 return format;
1560 }
1561 }
1562
1563
1564 /**
1565 * Do error checking of format/type combinations for glReadPixels,
1566 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1567 * and type values, we may either generate GL_INVALID_OPERATION or
1568 * GL_INVALID_ENUM.
1569 *
1570 * \param format pixel format.
1571 * \param type pixel type.
1572 *
1573 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1574 */
1575 GLenum
1576 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1577 GLenum format, GLenum type)
1578 {
1579 /* From OpenGL 3.3 spec, page 220:
1580 * "If the format is DEPTH_STENCIL, then values are taken from
1581 * both the depth buffer and the stencil buffer. If there is no
1582 * depth buffer or if there is no stencil buffer, then the error
1583 * INVALID_OPERATION occurs. If the type parameter is not
1584 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1585 * error INVALID_ENUM occurs."
1586 *
1587 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1588 * cannot be used to read depth or stencil in that API.
1589 */
1590 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1591 && type != GL_UNSIGNED_INT_24_8
1592 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1593 return GL_INVALID_ENUM;
1594
1595 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1596 switch (type) {
1597 case GL_BITMAP:
1598 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1599 return GL_INVALID_ENUM;
1600 }
1601 break;
1602
1603 case GL_UNSIGNED_BYTE_3_3_2:
1604 case GL_UNSIGNED_BYTE_2_3_3_REV:
1605 case GL_UNSIGNED_SHORT_5_6_5:
1606 case GL_UNSIGNED_SHORT_5_6_5_REV:
1607 if (format == GL_RGB) {
1608 break; /* OK */
1609 }
1610 if (format == GL_RGB_INTEGER_EXT &&
1611 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1612 break; /* OK */
1613 }
1614 return GL_INVALID_OPERATION;
1615
1616 case GL_UNSIGNED_SHORT_4_4_4_4:
1617 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1618 case GL_UNSIGNED_INT_8_8_8_8:
1619 case GL_UNSIGNED_INT_8_8_8_8_REV:
1620 if (format == GL_RGBA ||
1621 format == GL_BGRA ||
1622 format == GL_ABGR_EXT) {
1623 break; /* OK */
1624 }
1625 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1626 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1627 break; /* OK */
1628 }
1629 return GL_INVALID_OPERATION;
1630
1631 case GL_UNSIGNED_SHORT_5_5_5_1:
1632 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1633 case GL_UNSIGNED_INT_10_10_10_2:
1634 case GL_UNSIGNED_INT_2_10_10_10_REV:
1635 if (format == GL_RGBA ||
1636 format == GL_BGRA) {
1637 break; /* OK */
1638 }
1639 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1640 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1641 break; /* OK */
1642 }
1643 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1644 ctx->API == API_OPENGLES2) {
1645 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1646 }
1647 return GL_INVALID_OPERATION;
1648
1649 case GL_UNSIGNED_INT_24_8:
1650 if (format != GL_DEPTH_STENCIL) {
1651 return GL_INVALID_OPERATION;
1652 }
1653 return GL_NO_ERROR;
1654
1655 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1656 if (!ctx->Extensions.ARB_depth_buffer_float) {
1657 return GL_INVALID_ENUM;
1658 }
1659 if (format != GL_DEPTH_STENCIL) {
1660 return GL_INVALID_OPERATION;
1661 }
1662 return GL_NO_ERROR;
1663
1664 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1665 if (!ctx->Extensions.EXT_packed_float) {
1666 return GL_INVALID_ENUM;
1667 }
1668 if (format != GL_RGB) {
1669 return GL_INVALID_OPERATION;
1670 }
1671 return GL_NO_ERROR;
1672
1673 case GL_HALF_FLOAT_OES:
1674 switch (format) {
1675 case GL_RGBA:
1676 case GL_RGB:
1677 case GL_LUMINANCE_ALPHA:
1678 case GL_LUMINANCE:
1679 case GL_ALPHA:
1680 return GL_NO_ERROR;
1681 case GL_RG:
1682 case GL_RED:
1683 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1684 return GL_NO_ERROR;
1685 default:
1686 return GL_INVALID_OPERATION;
1687 }
1688
1689 default:
1690 ; /* fall-through */
1691 }
1692
1693 /* now, for each format, check the type for compatibility */
1694 switch (format) {
1695 case GL_COLOR_INDEX:
1696 case GL_STENCIL_INDEX:
1697 switch (type) {
1698 case GL_BITMAP:
1699 case GL_BYTE:
1700 case GL_UNSIGNED_BYTE:
1701 case GL_SHORT:
1702 case GL_UNSIGNED_SHORT:
1703 case GL_INT:
1704 case GL_UNSIGNED_INT:
1705 case GL_FLOAT:
1706 case GL_HALF_FLOAT:
1707 return GL_NO_ERROR;
1708 default:
1709 return GL_INVALID_ENUM;
1710 }
1711
1712 case GL_RED:
1713 case GL_GREEN:
1714 case GL_BLUE:
1715 case GL_ALPHA:
1716 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1717 case GL_INTENSITY:
1718 #endif
1719 case GL_LUMINANCE:
1720 case GL_LUMINANCE_ALPHA:
1721 case GL_DEPTH_COMPONENT:
1722 switch (type) {
1723 case GL_BYTE:
1724 case GL_UNSIGNED_BYTE:
1725 case GL_SHORT:
1726 case GL_UNSIGNED_SHORT:
1727 case GL_INT:
1728 case GL_UNSIGNED_INT:
1729 case GL_FLOAT:
1730 case GL_HALF_FLOAT:
1731 return GL_NO_ERROR;
1732 default:
1733 return GL_INVALID_ENUM;
1734 }
1735
1736 case GL_RG:
1737 if (!ctx->Extensions.ARB_texture_rg)
1738 return GL_INVALID_ENUM;
1739 switch (type) {
1740 case GL_BYTE:
1741 case GL_UNSIGNED_BYTE:
1742 case GL_SHORT:
1743 case GL_UNSIGNED_SHORT:
1744 case GL_INT:
1745 case GL_UNSIGNED_INT:
1746 case GL_FLOAT:
1747 case GL_HALF_FLOAT:
1748 return GL_NO_ERROR;
1749 default:
1750 return GL_INVALID_ENUM;
1751 }
1752
1753 case GL_RGB:
1754 switch (type) {
1755 case GL_BYTE:
1756 case GL_UNSIGNED_BYTE:
1757 case GL_SHORT:
1758 case GL_UNSIGNED_SHORT:
1759 case GL_INT:
1760 case GL_UNSIGNED_INT:
1761 case GL_FLOAT:
1762 case GL_UNSIGNED_BYTE_3_3_2:
1763 case GL_UNSIGNED_BYTE_2_3_3_REV:
1764 case GL_UNSIGNED_SHORT_5_6_5:
1765 case GL_UNSIGNED_SHORT_5_6_5_REV:
1766 case GL_HALF_FLOAT:
1767 return GL_NO_ERROR;
1768 case GL_UNSIGNED_INT_2_10_10_10_REV:
1769 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1770 return (ctx->API == API_OPENGLES2)
1771 ? GL_NO_ERROR : GL_INVALID_ENUM;
1772 case GL_UNSIGNED_INT_5_9_9_9_REV:
1773 return ctx->Extensions.EXT_texture_shared_exponent
1774 ? GL_NO_ERROR : GL_INVALID_ENUM;
1775 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1776 return ctx->Extensions.EXT_packed_float
1777 ? GL_NO_ERROR : GL_INVALID_ENUM;
1778 default:
1779 return GL_INVALID_ENUM;
1780 }
1781
1782 case GL_BGR:
1783 switch (type) {
1784 /* NOTE: no packed types are supported with BGR. That's
1785 * intentional, according to the GL spec.
1786 */
1787 case GL_BYTE:
1788 case GL_UNSIGNED_BYTE:
1789 case GL_SHORT:
1790 case GL_UNSIGNED_SHORT:
1791 case GL_INT:
1792 case GL_UNSIGNED_INT:
1793 case GL_FLOAT:
1794 case GL_HALF_FLOAT:
1795 return GL_NO_ERROR;
1796 default:
1797 return GL_INVALID_ENUM;
1798 }
1799
1800 case GL_RGBA:
1801 case GL_BGRA:
1802 switch (type) {
1803 case GL_BYTE:
1804 case GL_UNSIGNED_BYTE:
1805 case GL_SHORT:
1806 case GL_UNSIGNED_SHORT:
1807 case GL_INT:
1808 case GL_UNSIGNED_INT:
1809 case GL_FLOAT:
1810 case GL_UNSIGNED_SHORT_4_4_4_4:
1811 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1812 case GL_UNSIGNED_SHORT_5_5_5_1:
1813 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1814 case GL_UNSIGNED_INT_8_8_8_8:
1815 case GL_UNSIGNED_INT_8_8_8_8_REV:
1816 case GL_UNSIGNED_INT_10_10_10_2:
1817 case GL_UNSIGNED_INT_2_10_10_10_REV:
1818 case GL_HALF_FLOAT:
1819 return GL_NO_ERROR;
1820 default:
1821 return GL_INVALID_ENUM;
1822 }
1823
1824 case GL_ABGR_EXT:
1825 switch (type) {
1826 case GL_BYTE:
1827 case GL_UNSIGNED_BYTE:
1828 case GL_SHORT:
1829 case GL_UNSIGNED_SHORT:
1830 case GL_INT:
1831 case GL_UNSIGNED_INT:
1832 case GL_FLOAT:
1833 case GL_UNSIGNED_SHORT_4_4_4_4:
1834 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1835 case GL_UNSIGNED_INT_8_8_8_8:
1836 case GL_UNSIGNED_INT_8_8_8_8_REV:
1837 case GL_HALF_FLOAT:
1838 return GL_NO_ERROR;
1839 default:
1840 return GL_INVALID_ENUM;
1841 }
1842
1843 case GL_YCBCR_MESA:
1844 if (!ctx->Extensions.MESA_ycbcr_texture)
1845 return GL_INVALID_ENUM;
1846 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
1847 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
1848 return GL_NO_ERROR;
1849 else
1850 return GL_INVALID_OPERATION;
1851
1852 case GL_DEPTH_STENCIL:
1853 if (type == GL_UNSIGNED_INT_24_8)
1854 return GL_NO_ERROR;
1855 else if (ctx->Extensions.ARB_depth_buffer_float &&
1856 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1857 return GL_NO_ERROR;
1858 else
1859 return GL_INVALID_ENUM;
1860
1861 /* integer-valued formats */
1862 case GL_RED_INTEGER_EXT:
1863 case GL_GREEN_INTEGER_EXT:
1864 case GL_BLUE_INTEGER_EXT:
1865 case GL_ALPHA_INTEGER_EXT:
1866 case GL_RG_INTEGER:
1867 switch (type) {
1868 case GL_BYTE:
1869 case GL_UNSIGNED_BYTE:
1870 case GL_SHORT:
1871 case GL_UNSIGNED_SHORT:
1872 case GL_INT:
1873 case GL_UNSIGNED_INT:
1874 return (ctx->Version >= 30 ||
1875 ctx->Extensions.EXT_texture_integer)
1876 ? GL_NO_ERROR : GL_INVALID_ENUM;
1877 default:
1878 return GL_INVALID_ENUM;
1879 }
1880
1881 case GL_RGB_INTEGER_EXT:
1882 switch (type) {
1883 case GL_BYTE:
1884 case GL_UNSIGNED_BYTE:
1885 case GL_SHORT:
1886 case GL_UNSIGNED_SHORT:
1887 case GL_INT:
1888 case GL_UNSIGNED_INT:
1889 return (ctx->Version >= 30 ||
1890 ctx->Extensions.EXT_texture_integer)
1891 ? GL_NO_ERROR : GL_INVALID_ENUM;
1892 case GL_UNSIGNED_BYTE_3_3_2:
1893 case GL_UNSIGNED_BYTE_2_3_3_REV:
1894 case GL_UNSIGNED_SHORT_5_6_5:
1895 case GL_UNSIGNED_SHORT_5_6_5_REV:
1896 return ctx->Extensions.ARB_texture_rgb10_a2ui
1897 ? GL_NO_ERROR : GL_INVALID_ENUM;
1898 default:
1899 return GL_INVALID_ENUM;
1900 }
1901
1902 case GL_BGR_INTEGER_EXT:
1903 switch (type) {
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 /* NOTE: no packed formats w/ BGR format */
1911 return (ctx->Version >= 30 ||
1912 ctx->Extensions.EXT_texture_integer)
1913 ? GL_NO_ERROR : GL_INVALID_ENUM;
1914 default:
1915 return GL_INVALID_ENUM;
1916 }
1917
1918 case GL_RGBA_INTEGER_EXT:
1919 case GL_BGRA_INTEGER_EXT:
1920 switch (type) {
1921 case GL_BYTE:
1922 case GL_UNSIGNED_BYTE:
1923 case GL_SHORT:
1924 case GL_UNSIGNED_SHORT:
1925 case GL_INT:
1926 case GL_UNSIGNED_INT:
1927 return (ctx->Version >= 30 ||
1928 ctx->Extensions.EXT_texture_integer)
1929 ? GL_NO_ERROR : GL_INVALID_ENUM;
1930 case GL_UNSIGNED_SHORT_4_4_4_4:
1931 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1932 case GL_UNSIGNED_SHORT_5_5_5_1:
1933 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1934 case GL_UNSIGNED_INT_8_8_8_8:
1935 case GL_UNSIGNED_INT_8_8_8_8_REV:
1936 case GL_UNSIGNED_INT_10_10_10_2:
1937 case GL_UNSIGNED_INT_2_10_10_10_REV:
1938 return ctx->Extensions.ARB_texture_rgb10_a2ui
1939 ? GL_NO_ERROR : GL_INVALID_ENUM;
1940 default:
1941 return GL_INVALID_ENUM;
1942 }
1943
1944 case GL_LUMINANCE_INTEGER_EXT:
1945 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1946 switch (type) {
1947 case GL_BYTE:
1948 case GL_UNSIGNED_BYTE:
1949 case GL_SHORT:
1950 case GL_UNSIGNED_SHORT:
1951 case GL_INT:
1952 case GL_UNSIGNED_INT:
1953 return ctx->Extensions.EXT_texture_integer
1954 ? GL_NO_ERROR : GL_INVALID_ENUM;
1955 default:
1956 return GL_INVALID_ENUM;
1957 }
1958
1959 default:
1960 return GL_INVALID_ENUM;
1961 }
1962 return GL_NO_ERROR;
1963 }
1964
1965
1966 /**
1967 * Do error checking of format/type combinations for OpenGL ES glReadPixels
1968 * and glTex[Sub]Image.
1969 * \return error code, or GL_NO_ERROR.
1970 */
1971 GLenum
1972 _mesa_es_error_check_format_and_type(GLenum format, GLenum type,
1973 unsigned dimensions)
1974 {
1975 GLboolean type_valid = GL_TRUE;
1976
1977 switch (format) {
1978 case GL_ALPHA:
1979 case GL_LUMINANCE:
1980 case GL_LUMINANCE_ALPHA:
1981 type_valid = (type == GL_UNSIGNED_BYTE
1982 || type == GL_FLOAT
1983 || type == GL_HALF_FLOAT_OES);
1984 break;
1985
1986 case GL_RGB:
1987 type_valid = (type == GL_UNSIGNED_BYTE
1988 || type == GL_UNSIGNED_SHORT_5_6_5
1989 || type == GL_FLOAT
1990 || type == GL_HALF_FLOAT_OES);
1991 break;
1992
1993 case GL_RGBA:
1994 type_valid = (type == GL_UNSIGNED_BYTE
1995 || type == GL_UNSIGNED_SHORT_4_4_4_4
1996 || type == GL_UNSIGNED_SHORT_5_5_5_1
1997 || type == GL_FLOAT
1998 || type == GL_HALF_FLOAT_OES
1999 || type == GL_UNSIGNED_INT_2_10_10_10_REV);
2000 break;
2001
2002 case GL_DEPTH_COMPONENT:
2003 /* This format is filtered against invalid dimensionalities elsewhere.
2004 */
2005 type_valid = (type == GL_UNSIGNED_SHORT
2006 || type == GL_UNSIGNED_INT);
2007 break;
2008
2009 case GL_DEPTH_STENCIL:
2010 /* This format is filtered against invalid dimensionalities elsewhere.
2011 */
2012 type_valid = (type == GL_UNSIGNED_INT_24_8);
2013 break;
2014
2015 case GL_BGRA_EXT:
2016 type_valid = (type == GL_UNSIGNED_BYTE);
2017
2018 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2019 * the format does not appear to be allowed for 3D textures in OpenGL
2020 * ES.
2021 */
2022 if (dimensions != 2)
2023 return GL_INVALID_VALUE;
2024
2025 break;
2026
2027 default:
2028 return GL_INVALID_VALUE;
2029 }
2030
2031 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2032 }
2033
2034
2035 /**
2036 * Do error checking of format/type combinations for OpenGL ES 3
2037 * glTex[Sub]Image.
2038 * \return error code, or GL_NO_ERROR.
2039 */
2040 GLenum
2041 _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
2042 GLenum format, GLenum type,
2043 GLenum internalFormat)
2044 {
2045 switch (format) {
2046 case GL_RGBA:
2047 switch (type) {
2048 case GL_UNSIGNED_BYTE:
2049 switch (internalFormat) {
2050 case GL_RGBA:
2051 case GL_RGBA8:
2052 case GL_RGB5_A1:
2053 case GL_RGBA4:
2054 case GL_SRGB8_ALPHA8_EXT:
2055 break;
2056 default:
2057 return GL_INVALID_OPERATION;
2058 }
2059 break;
2060
2061 case GL_BYTE:
2062 if (internalFormat != GL_RGBA8_SNORM)
2063 return GL_INVALID_OPERATION;
2064 break;
2065
2066 case GL_UNSIGNED_SHORT_4_4_4_4:
2067 switch (internalFormat) {
2068 case GL_RGBA:
2069 case GL_RGBA4:
2070 break;
2071 default:
2072 return GL_INVALID_OPERATION;
2073 }
2074 break;
2075
2076 case GL_UNSIGNED_SHORT_5_5_5_1:
2077 switch (internalFormat) {
2078 case GL_RGBA:
2079 case GL_RGB5_A1:
2080 break;
2081 default:
2082 return GL_INVALID_OPERATION;
2083 }
2084 break;
2085
2086 case GL_UNSIGNED_INT_2_10_10_10_REV:
2087 switch (internalFormat) {
2088 case GL_RGBA: /* GL_EXT_texture_type_2_10_10_10_REV */
2089 case GL_RGB10_A2:
2090 case GL_RGB5_A1:
2091 break;
2092 default:
2093 return GL_INVALID_OPERATION;
2094 }
2095 break;
2096
2097 case GL_HALF_FLOAT:
2098 if (internalFormat != GL_RGBA16F)
2099 return GL_INVALID_OPERATION;
2100 break;
2101
2102 case GL_FLOAT:
2103 switch (internalFormat) {
2104 case GL_RGBA16F:
2105 case GL_RGBA32F:
2106 break;
2107 case GL_RGBA:
2108 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2109 break;
2110 default:
2111 return GL_INVALID_OPERATION;
2112 }
2113 break;
2114
2115 case GL_HALF_FLOAT_OES:
2116 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2117 break;
2118 default:
2119 return GL_INVALID_OPERATION;
2120 }
2121 break;
2122
2123 case GL_RGBA_INTEGER:
2124 switch (type) {
2125 case GL_UNSIGNED_BYTE:
2126 if (internalFormat != GL_RGBA8UI)
2127 return GL_INVALID_OPERATION;
2128 break;
2129
2130 case GL_BYTE:
2131 if (internalFormat != GL_RGBA8I)
2132 return GL_INVALID_OPERATION;
2133 break;
2134
2135 case GL_UNSIGNED_SHORT:
2136 if (internalFormat != GL_RGBA16UI)
2137 return GL_INVALID_OPERATION;
2138 break;
2139
2140 case GL_SHORT:
2141 if (internalFormat != GL_RGBA16I)
2142 return GL_INVALID_OPERATION;
2143 break;
2144
2145 case GL_UNSIGNED_INT:
2146 if (internalFormat != GL_RGBA32UI)
2147 return GL_INVALID_OPERATION;
2148 break;
2149
2150 case GL_INT:
2151 if (internalFormat != GL_RGBA32I)
2152 return GL_INVALID_OPERATION;
2153 break;
2154
2155 case GL_UNSIGNED_INT_2_10_10_10_REV:
2156 if (internalFormat != GL_RGB10_A2UI)
2157 return GL_INVALID_OPERATION;
2158 break;
2159
2160 default:
2161 return GL_INVALID_OPERATION;
2162 }
2163 break;
2164
2165 case GL_RGB:
2166 switch (type) {
2167 case GL_UNSIGNED_BYTE:
2168 switch (internalFormat) {
2169 case GL_RGB:
2170 case GL_RGB8:
2171 case GL_RGB565:
2172 case GL_SRGB8:
2173 break;
2174 default:
2175 return GL_INVALID_OPERATION;
2176 }
2177 break;
2178
2179 case GL_BYTE:
2180 if (internalFormat != GL_RGB8_SNORM)
2181 return GL_INVALID_OPERATION;
2182 break;
2183
2184 case GL_UNSIGNED_SHORT_5_6_5:
2185 switch (internalFormat) {
2186 case GL_RGB:
2187 case GL_RGB565:
2188 break;
2189 default:
2190 return GL_INVALID_OPERATION;
2191 }
2192 break;
2193
2194 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2195 if (internalFormat != GL_R11F_G11F_B10F)
2196 return GL_INVALID_OPERATION;
2197 break;
2198
2199 case GL_UNSIGNED_INT_5_9_9_9_REV:
2200 if (internalFormat != GL_RGB9_E5)
2201 return GL_INVALID_OPERATION;
2202 break;
2203
2204 case GL_HALF_FLOAT:
2205 switch (internalFormat) {
2206 case GL_RGB16F:
2207 case GL_R11F_G11F_B10F:
2208 case GL_RGB9_E5:
2209 break;
2210 default:
2211 return GL_INVALID_OPERATION;
2212 }
2213 break;
2214
2215 case GL_FLOAT:
2216 switch (internalFormat) {
2217 case GL_RGB16F:
2218 case GL_RGB32F:
2219 case GL_R11F_G11F_B10F:
2220 case GL_RGB9_E5:
2221 break;
2222 case GL_RGB:
2223 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2224 break;
2225 default:
2226 return GL_INVALID_OPERATION;
2227 }
2228 break;
2229
2230 case GL_HALF_FLOAT_OES:
2231 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
2232 return GL_INVALID_OPERATION;
2233 break;
2234
2235 case GL_UNSIGNED_INT_2_10_10_10_REV:
2236 switch (internalFormat) {
2237 case GL_RGB: /* GL_EXT_texture_type_2_10_10_10_REV */
2238 break;
2239 default:
2240 return GL_INVALID_OPERATION;
2241 }
2242 break;
2243
2244 default:
2245 return GL_INVALID_OPERATION;
2246 }
2247 break;
2248
2249 case GL_RGB_INTEGER:
2250 switch (type) {
2251 case GL_UNSIGNED_BYTE:
2252 if (internalFormat != GL_RGB8UI)
2253 return GL_INVALID_OPERATION;
2254 break;
2255
2256 case GL_BYTE:
2257 if (internalFormat != GL_RGB8I)
2258 return GL_INVALID_OPERATION;
2259 break;
2260
2261 case GL_UNSIGNED_SHORT:
2262 if (internalFormat != GL_RGB16UI)
2263 return GL_INVALID_OPERATION;
2264 break;
2265
2266 case GL_SHORT:
2267 if (internalFormat != GL_RGB16I)
2268 return GL_INVALID_OPERATION;
2269 break;
2270
2271 case GL_UNSIGNED_INT:
2272 if (internalFormat != GL_RGB32UI)
2273 return GL_INVALID_OPERATION;
2274 break;
2275
2276 case GL_INT:
2277 if (internalFormat != GL_RGB32I)
2278 return GL_INVALID_OPERATION;
2279 break;
2280
2281 default:
2282 return GL_INVALID_OPERATION;
2283 }
2284 break;
2285
2286 case GL_RG:
2287 switch (type) {
2288 case GL_UNSIGNED_BYTE:
2289 if (internalFormat != GL_RG8)
2290 return GL_INVALID_OPERATION;
2291 break;
2292
2293 case GL_BYTE:
2294 if (internalFormat != GL_RG8_SNORM)
2295 return GL_INVALID_OPERATION;
2296 break;
2297
2298 case GL_HALF_FLOAT:
2299 case GL_HALF_FLOAT_OES:
2300 switch (internalFormat) {
2301 case GL_RG16F:
2302 break;
2303 case GL_RG:
2304 if (ctx->Extensions.ARB_texture_rg &&
2305 ctx->Extensions.OES_texture_half_float)
2306 break;
2307 /* fallthrough */
2308 default:
2309 return GL_INVALID_OPERATION;
2310 }
2311 break;
2312
2313 case GL_FLOAT:
2314 switch (internalFormat) {
2315 case GL_RG16F:
2316 case GL_RG32F:
2317 break;
2318 case GL_RG:
2319 if (ctx->Extensions.ARB_texture_rg &&
2320 ctx->Extensions.OES_texture_float)
2321 break;
2322 /* fallthrough */
2323 default:
2324 return GL_INVALID_OPERATION;
2325 }
2326 break;
2327
2328 default:
2329 return GL_INVALID_OPERATION;
2330 }
2331 break;
2332
2333 case GL_RG_INTEGER:
2334 switch (type) {
2335 case GL_UNSIGNED_BYTE:
2336 if (internalFormat != GL_RG8UI)
2337 return GL_INVALID_OPERATION;
2338 break;
2339
2340 case GL_BYTE:
2341 if (internalFormat != GL_RG8I)
2342 return GL_INVALID_OPERATION;
2343 break;
2344
2345 case GL_UNSIGNED_SHORT:
2346 if (internalFormat != GL_RG16UI)
2347 return GL_INVALID_OPERATION;
2348 break;
2349
2350 case GL_SHORT:
2351 if (internalFormat != GL_RG16I)
2352 return GL_INVALID_OPERATION;
2353 break;
2354
2355 case GL_UNSIGNED_INT:
2356 if (internalFormat != GL_RG32UI)
2357 return GL_INVALID_OPERATION;
2358 break;
2359
2360 case GL_INT:
2361 if (internalFormat != GL_RG32I)
2362 return GL_INVALID_OPERATION;
2363 break;
2364
2365 default:
2366 return GL_INVALID_OPERATION;
2367 }
2368 break;
2369
2370 case GL_RED:
2371 switch (type) {
2372 case GL_UNSIGNED_BYTE:
2373 if (internalFormat != GL_R8)
2374 return GL_INVALID_OPERATION;
2375 break;
2376
2377 case GL_BYTE:
2378 if (internalFormat != GL_R8_SNORM)
2379 return GL_INVALID_OPERATION;
2380 break;
2381
2382 case GL_HALF_FLOAT:
2383 case GL_HALF_FLOAT_OES:
2384 switch (internalFormat) {
2385 case GL_R16F:
2386 break;
2387 case GL_RG:
2388 case GL_RED:
2389 if (ctx->Extensions.ARB_texture_rg &&
2390 ctx->Extensions.OES_texture_half_float)
2391 break;
2392 /* fallthrough */
2393 default:
2394 return GL_INVALID_OPERATION;
2395 }
2396 break;
2397
2398 case GL_FLOAT:
2399 switch (internalFormat) {
2400 case GL_R16F:
2401 case GL_R32F:
2402 break;
2403 case GL_RED:
2404 if (ctx->Extensions.ARB_texture_rg &&
2405 ctx->Extensions.OES_texture_float)
2406 break;
2407 /* fallthrough */
2408 default:
2409 return GL_INVALID_OPERATION;
2410 }
2411 break;
2412
2413 default:
2414 return GL_INVALID_OPERATION;
2415 }
2416 break;
2417
2418 case GL_RED_INTEGER:
2419 switch (type) {
2420 case GL_UNSIGNED_BYTE:
2421 if (internalFormat != GL_R8UI)
2422 return GL_INVALID_OPERATION;
2423 break;
2424
2425 case GL_BYTE:
2426 if (internalFormat != GL_R8I)
2427 return GL_INVALID_OPERATION;
2428 break;
2429
2430 case GL_UNSIGNED_SHORT:
2431 if (internalFormat != GL_R16UI)
2432 return GL_INVALID_OPERATION;
2433 break;
2434
2435 case GL_SHORT:
2436 if (internalFormat != GL_R16I)
2437 return GL_INVALID_OPERATION;
2438 break;
2439
2440 case GL_UNSIGNED_INT:
2441 if (internalFormat != GL_R32UI)
2442 return GL_INVALID_OPERATION;
2443 break;
2444
2445 case GL_INT:
2446 if (internalFormat != GL_R32I)
2447 return GL_INVALID_OPERATION;
2448 break;
2449
2450 default:
2451 return GL_INVALID_OPERATION;
2452 }
2453 break;
2454
2455 case GL_DEPTH_COMPONENT:
2456 switch (type) {
2457 case GL_UNSIGNED_SHORT:
2458 if (internalFormat != GL_DEPTH_COMPONENT
2459 && internalFormat != GL_DEPTH_COMPONENT16)
2460 return GL_INVALID_OPERATION;
2461 break;
2462
2463 case GL_UNSIGNED_INT:
2464 switch (internalFormat) {
2465 case GL_DEPTH_COMPONENT:
2466 case GL_DEPTH_COMPONENT16:
2467 case GL_DEPTH_COMPONENT24:
2468 break;
2469 default:
2470 return GL_INVALID_OPERATION;
2471 }
2472 break;
2473
2474 case GL_FLOAT:
2475 if (internalFormat != GL_DEPTH_COMPONENT32F)
2476 return GL_INVALID_OPERATION;
2477 break;
2478
2479 default:
2480 return GL_INVALID_OPERATION;
2481 }
2482 break;
2483
2484 case GL_DEPTH_STENCIL:
2485 switch (type) {
2486 case GL_UNSIGNED_INT_24_8:
2487 if (internalFormat != GL_DEPTH_STENCIL
2488 && internalFormat != GL_DEPTH24_STENCIL8)
2489 return GL_INVALID_OPERATION;
2490 break;
2491
2492 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2493 if (internalFormat != GL_DEPTH32F_STENCIL8)
2494 return GL_INVALID_OPERATION;
2495 break;
2496
2497 default:
2498 return GL_INVALID_OPERATION;
2499 }
2500 break;
2501
2502 case GL_ALPHA:
2503 case GL_LUMINANCE:
2504 case GL_LUMINANCE_ALPHA:
2505 switch (type) {
2506 case GL_FLOAT:
2507 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2508 break;
2509 case GL_HALF_FLOAT_OES:
2510 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2511 break;
2512 default:
2513 if (type != GL_UNSIGNED_BYTE || format != internalFormat)
2514 return GL_INVALID_OPERATION;
2515 }
2516 }
2517
2518 return GL_NO_ERROR;
2519 }
2520
2521 static void
2522 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
2523 {
2524 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
2525 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
2526 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
2527 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
2528 }
2529
2530 static bool
2531 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
2532 {
2533 switch (format) {
2534 case GL_RGBA:
2535 case GL_RGBA_INTEGER_EXT:
2536 set_swizzle(swizzle, 0, 1, 2, 3);
2537 return true;
2538 case GL_BGRA:
2539 case GL_BGRA_INTEGER_EXT:
2540 set_swizzle(swizzle, 2, 1, 0, 3);
2541 return true;
2542 case GL_ABGR_EXT:
2543 set_swizzle(swizzle, 3, 2, 1, 0);
2544 return true;
2545 case GL_RGB:
2546 case GL_RGB_INTEGER_EXT:
2547 set_swizzle(swizzle, 0, 1, 2, 5);
2548 return true;
2549 case GL_BGR:
2550 case GL_BGR_INTEGER_EXT:
2551 set_swizzle(swizzle, 2, 1, 0, 5);
2552 return true;
2553 case GL_LUMINANCE_ALPHA:
2554 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2555 set_swizzle(swizzle, 0, 0, 0, 1);
2556 return true;
2557 case GL_RG:
2558 case GL_RG_INTEGER:
2559 set_swizzle(swizzle, 0, 1, 4, 5);
2560 return true;
2561 case GL_RED:
2562 case GL_RED_INTEGER_EXT:
2563 set_swizzle(swizzle, 0, 4, 4, 5);
2564 return true;
2565 case GL_GREEN:
2566 case GL_GREEN_INTEGER_EXT:
2567 set_swizzle(swizzle, 4, 0, 4, 5);
2568 return true;
2569 case GL_BLUE:
2570 case GL_BLUE_INTEGER_EXT:
2571 set_swizzle(swizzle, 4, 4, 0, 5);
2572 return true;
2573 case GL_ALPHA:
2574 case GL_ALPHA_INTEGER_EXT:
2575 set_swizzle(swizzle, 4, 4, 4, 0);
2576 return true;
2577 case GL_LUMINANCE:
2578 case GL_LUMINANCE_INTEGER_EXT:
2579 set_swizzle(swizzle, 0, 0, 0, 5);
2580 return true;
2581 case GL_INTENSITY:
2582 set_swizzle(swizzle, 0, 0, 0, 0);
2583 return true;
2584 default:
2585 return false;
2586 }
2587 }
2588
2589 /**
2590 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
2591 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
2592 * otherwise (for non-array formats).
2593 *
2594 * This function will typically be used to compute a mesa format from a GL type
2595 * so we can then call _mesa_format_convert. This function does
2596 * not consider byte swapping, so it returns types assuming that no byte
2597 * swapping is involved. If byte swapping is involved then clients are supposed
2598 * to handle that on their side before calling _mesa_format_convert.
2599 *
2600 * This function returns an uint32_t that can pack a mesa_format or a
2601 * mesa_array_format. Clients must check the mesa array format bit
2602 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
2603 * format is a mesa_array_format or a mesa_format.
2604 */
2605 uint32_t
2606 _mesa_format_from_format_and_type(GLenum format, GLenum type)
2607 {
2608 mesa_array_format array_format;
2609
2610 bool is_array_format = true;
2611 uint8_t swizzle[4];
2612 bool normalized = false, is_float = false, is_signed = false;
2613 int num_channels = 0, type_size = 0;
2614
2615 /* Extract array format type information from the OpenGL data type */
2616 switch (type) {
2617 case GL_UNSIGNED_BYTE:
2618 type_size = 1;
2619 break;
2620 case GL_BYTE:
2621 type_size = 1;
2622 is_signed = true;
2623 break;
2624 case GL_UNSIGNED_SHORT:
2625 type_size = 2;
2626 break;
2627 case GL_SHORT:
2628 type_size = 2;
2629 is_signed = true;
2630 break;
2631 case GL_UNSIGNED_INT:
2632 type_size = 4;
2633 break;
2634 case GL_INT:
2635 type_size = 4;
2636 is_signed = true;
2637 break;
2638 case GL_HALF_FLOAT:
2639 case GL_HALF_FLOAT_OES:
2640 type_size = 2;
2641 is_signed = true;
2642 is_float = true;
2643 break;
2644 case GL_FLOAT:
2645 type_size = 4;
2646 is_signed = true;
2647 is_float = true;
2648 break;
2649 default:
2650 is_array_format = false;
2651 break;
2652 }
2653
2654 /* Extract array format swizzle information from the OpenGL format */
2655 if (is_array_format)
2656 is_array_format = get_swizzle_from_gl_format(format, swizzle);
2657
2658 /* If this is an array format type after checking data type and format,
2659 * create the array format
2660 */
2661 if (is_array_format) {
2662 normalized = !_mesa_is_enum_format_integer(format);
2663 num_channels = _mesa_components_in_format(format);
2664
2665 array_format =
2666 MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
2667 normalized, num_channels,
2668 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
2669
2670 if (!_mesa_little_endian())
2671 array_format = _mesa_array_format_flip_channels(array_format);
2672
2673 return array_format;
2674 }
2675
2676 /* Otherwise this is not an array format, so return the mesa_format
2677 * matching the OpenGL format and data type
2678 */
2679 switch (type) {
2680 case GL_UNSIGNED_SHORT_5_6_5:
2681 if (format == GL_RGB)
2682 return MESA_FORMAT_B5G6R5_UNORM;
2683 else if (format == GL_BGR)
2684 return MESA_FORMAT_R5G6B5_UNORM;
2685 break;
2686 case GL_UNSIGNED_SHORT_5_6_5_REV:
2687 if (format == GL_RGB)
2688 return MESA_FORMAT_R5G6B5_UNORM;
2689 else if (format == GL_BGR)
2690 return MESA_FORMAT_B5G6R5_UNORM;
2691 break;
2692 case GL_UNSIGNED_SHORT_4_4_4_4:
2693 if (format == GL_RGBA)
2694 return MESA_FORMAT_A4B4G4R4_UNORM;
2695 else if (format == GL_BGRA)
2696 return MESA_FORMAT_A4R4G4B4_UNORM;
2697 else if (format == GL_ABGR_EXT)
2698 return MESA_FORMAT_R4G4B4A4_UNORM;
2699 break;
2700 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2701 if (format == GL_RGBA)
2702 return MESA_FORMAT_R4G4B4A4_UNORM;
2703 else if (format == GL_BGRA)
2704 return MESA_FORMAT_B4G4R4A4_UNORM;
2705 else if (format == GL_ABGR_EXT)
2706 return MESA_FORMAT_A4B4G4R4_UNORM;
2707 break;
2708 case GL_UNSIGNED_SHORT_5_5_5_1:
2709 if (format == GL_RGBA)
2710 return MESA_FORMAT_A1B5G5R5_UNORM;
2711 else if (format == GL_BGRA)
2712 return MESA_FORMAT_A1R5G5B5_UNORM;
2713 break;
2714 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2715 if (format == GL_RGBA)
2716 return MESA_FORMAT_R5G5B5A1_UNORM;
2717 else if (format == GL_BGRA)
2718 return MESA_FORMAT_B5G5R5A1_UNORM;
2719 break;
2720 case GL_UNSIGNED_BYTE_3_3_2:
2721 if (format == GL_RGB)
2722 return MESA_FORMAT_B2G3R3_UNORM;
2723 break;
2724 case GL_UNSIGNED_BYTE_2_3_3_REV:
2725 if (format == GL_RGB)
2726 return MESA_FORMAT_R3G3B2_UNORM;
2727 break;
2728 case GL_UNSIGNED_INT_5_9_9_9_REV:
2729 if (format == GL_RGB)
2730 return MESA_FORMAT_R9G9B9E5_FLOAT;
2731 break;
2732 case GL_UNSIGNED_INT_10_10_10_2:
2733 if (format == GL_RGBA)
2734 return MESA_FORMAT_A2B10G10R10_UNORM;
2735 else if (format == GL_RGBA_INTEGER)
2736 return MESA_FORMAT_A2B10G10R10_UINT;
2737 else if (format == GL_BGRA)
2738 return MESA_FORMAT_A2R10G10B10_UNORM;
2739 else if (format == GL_BGRA_INTEGER)
2740 return MESA_FORMAT_A2R10G10B10_UINT;
2741 break;
2742 case GL_UNSIGNED_INT_2_10_10_10_REV:
2743 if (format == GL_RGB)
2744 return MESA_FORMAT_R10G10B10X2_UNORM;
2745 if (format == GL_RGBA)
2746 return MESA_FORMAT_R10G10B10A2_UNORM;
2747 else if (format == GL_RGBA_INTEGER)
2748 return MESA_FORMAT_R10G10B10A2_UINT;
2749 else if (format == GL_BGRA)
2750 return MESA_FORMAT_B10G10R10A2_UNORM;
2751 else if (format == GL_BGRA_INTEGER)
2752 return MESA_FORMAT_B10G10R10A2_UINT;
2753 break;
2754 case GL_UNSIGNED_INT_8_8_8_8:
2755 if (format == GL_RGBA)
2756 return MESA_FORMAT_A8B8G8R8_UNORM;
2757 else if (format == GL_BGRA)
2758 return MESA_FORMAT_A8R8G8B8_UNORM;
2759 else if (format == GL_ABGR_EXT)
2760 return MESA_FORMAT_R8G8B8A8_UNORM;
2761 break;
2762 case GL_UNSIGNED_INT_8_8_8_8_REV:
2763 if (format == GL_RGBA)
2764 return MESA_FORMAT_R8G8B8A8_UNORM;
2765 else if (format == GL_BGRA)
2766 return MESA_FORMAT_B8G8R8A8_UNORM;
2767 else if (format == GL_ABGR_EXT)
2768 return MESA_FORMAT_A8B8G8R8_UNORM;
2769 break;
2770 case GL_UNSIGNED_SHORT_8_8_MESA:
2771 if (format == GL_YCBCR_MESA)
2772 return MESA_FORMAT_YCBCR;
2773 break;
2774 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
2775 if (format == GL_YCBCR_MESA)
2776 return MESA_FORMAT_YCBCR_REV;
2777 break;
2778 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2779 if (format == GL_RGB)
2780 return MESA_FORMAT_R11G11B10_FLOAT;
2781 default:
2782 break;
2783 }
2784
2785 /* If we got here it means that we could not find a Mesa format that
2786 * matches the GL format/type provided. We may need to add a new Mesa
2787 * format in that case.
2788 */
2789 unreachable("Unsupported format");
2790 }