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mesa/glformats: refactor compressed format support function
[mesa.git] / src / mesa / main / glformats.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008-2009 VMware, Inc.
6 * Copyright (c) 2012 Intel Corporation
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28 #include "context.h"
29 #include "glformats.h"
30 #include "formats.h"
31 #include "texcompress.h"
32 #include "enums.h"
33
34 enum {
35 ZERO = 4,
36 ONE = 5
37 };
38
39 enum {
40 IDX_LUMINANCE = 0,
41 IDX_ALPHA,
42 IDX_INTENSITY,
43 IDX_LUMINANCE_ALPHA,
44 IDX_RGB,
45 IDX_RGBA,
46 IDX_RED,
47 IDX_GREEN,
48 IDX_BLUE,
49 IDX_BGR,
50 IDX_BGRA,
51 IDX_ABGR,
52 IDX_RG,
53 MAX_IDX
54 };
55
56 #define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
57 #define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
58 #define MAP3(x,y,z) MAP4(x, y, z, ZERO)
59 #define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
60
61 static const struct {
62 GLubyte format_idx;
63 GLubyte to_rgba[6];
64 GLubyte from_rgba[6];
65 } mappings[MAX_IDX] =
66 {
67 {
68 IDX_LUMINANCE,
69 MAP4(0,0,0,ONE),
70 MAP1(0)
71 },
72
73 {
74 IDX_ALPHA,
75 MAP4(ZERO, ZERO, ZERO, 0),
76 MAP1(3)
77 },
78
79 {
80 IDX_INTENSITY,
81 MAP4(0, 0, 0, 0),
82 MAP1(0),
83 },
84
85 {
86 IDX_LUMINANCE_ALPHA,
87 MAP4(0,0,0,1),
88 MAP2(0,3)
89 },
90
91 {
92 IDX_RGB,
93 MAP4(0,1,2,ONE),
94 MAP3(0,1,2)
95 },
96
97 {
98 IDX_RGBA,
99 MAP4(0,1,2,3),
100 MAP4(0,1,2,3),
101 },
102
103 {
104 IDX_RED,
105 MAP4(0, ZERO, ZERO, ONE),
106 MAP1(0),
107 },
108
109 {
110 IDX_GREEN,
111 MAP4(ZERO, 0, ZERO, ONE),
112 MAP1(1),
113 },
114
115 {
116 IDX_BLUE,
117 MAP4(ZERO, ZERO, 0, ONE),
118 MAP1(2),
119 },
120
121 {
122 IDX_BGR,
123 MAP4(2,1,0,ONE),
124 MAP3(2,1,0)
125 },
126
127 {
128 IDX_BGRA,
129 MAP4(2,1,0,3),
130 MAP4(2,1,0,3)
131 },
132
133 {
134 IDX_ABGR,
135 MAP4(3,2,1,0),
136 MAP4(3,2,1,0)
137 },
138
139 {
140 IDX_RG,
141 MAP4(0, 1, ZERO, ONE),
142 MAP2(0, 1)
143 },
144 };
145
146 /**
147 * Convert a GL image format enum to an IDX_* value (see above).
148 */
149 static int
150 get_map_idx(GLenum value)
151 {
152 switch (value) {
153 case GL_LUMINANCE:
154 case GL_LUMINANCE_INTEGER_EXT:
155 return IDX_LUMINANCE;
156 case GL_ALPHA:
157 case GL_ALPHA_INTEGER:
158 return IDX_ALPHA;
159 case GL_INTENSITY:
160 return IDX_INTENSITY;
161 case GL_LUMINANCE_ALPHA:
162 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
163 return IDX_LUMINANCE_ALPHA;
164 case GL_RGB:
165 case GL_RGB_INTEGER:
166 return IDX_RGB;
167 case GL_RGBA:
168 case GL_RGBA_INTEGER:
169 return IDX_RGBA;
170 case GL_RED:
171 case GL_RED_INTEGER:
172 return IDX_RED;
173 case GL_GREEN:
174 return IDX_GREEN;
175 case GL_BLUE:
176 return IDX_BLUE;
177 case GL_BGR:
178 case GL_BGR_INTEGER:
179 return IDX_BGR;
180 case GL_BGRA:
181 case GL_BGRA_INTEGER:
182 return IDX_BGRA;
183 case GL_ABGR_EXT:
184 return IDX_ABGR;
185 case GL_RG:
186 case GL_RG_INTEGER:
187 return IDX_RG;
188 default:
189 _mesa_problem(NULL, "Unexpected inFormat %s",
190 _mesa_enum_to_string(value));
191 return 0;
192 }
193 }
194
195 /**
196 * When promoting texture formats (see below) we need to compute the
197 * mapping of dest components back to source components.
198 * This function does that.
199 * \param inFormat the incoming format of the texture
200 * \param outFormat the final texture format
201 * \return map[6] a full 6-component map
202 */
203 void
204 _mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
205 {
206 const int inFmt = get_map_idx(inFormat);
207 const int outFmt = get_map_idx(outFormat);
208 const GLubyte *in2rgba = mappings[inFmt].to_rgba;
209 const GLubyte *rgba2out = mappings[outFmt].from_rgba;
210 int i;
211
212 for (i = 0; i < 4; i++)
213 map[i] = in2rgba[rgba2out[i]];
214
215 map[ZERO] = ZERO;
216 map[ONE] = ONE;
217
218 #if 0
219 printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
220 inFormat, _mesa_enum_to_string(inFormat),
221 outFormat, _mesa_enum_to_string(outFormat),
222 map[0],
223 map[1],
224 map[2],
225 map[3],
226 map[4],
227 map[5]);
228 #endif
229 }
230
231 /**
232 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
233 */
234 GLboolean
235 _mesa_type_is_packed(GLenum type)
236 {
237 switch (type) {
238 case GL_UNSIGNED_BYTE_3_3_2:
239 case GL_UNSIGNED_BYTE_2_3_3_REV:
240 case MESA_UNSIGNED_BYTE_4_4:
241 case GL_UNSIGNED_SHORT_5_6_5:
242 case GL_UNSIGNED_SHORT_5_6_5_REV:
243 case GL_UNSIGNED_SHORT_4_4_4_4:
244 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
245 case GL_UNSIGNED_SHORT_5_5_5_1:
246 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
247 case GL_UNSIGNED_INT_8_8_8_8:
248 case GL_UNSIGNED_INT_8_8_8_8_REV:
249 case GL_UNSIGNED_INT_10_10_10_2:
250 case GL_UNSIGNED_INT_2_10_10_10_REV:
251 case GL_UNSIGNED_SHORT_8_8_MESA:
252 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
253 case GL_UNSIGNED_INT_24_8_EXT:
254 case GL_UNSIGNED_INT_5_9_9_9_REV:
255 case GL_UNSIGNED_INT_10F_11F_11F_REV:
256 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
257 return GL_TRUE;
258 }
259
260 return GL_FALSE;
261 }
262
263
264 /**
265 * Get the size of a GL data type.
266 *
267 * \param type GL data type.
268 *
269 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
270 * if an invalid type enum.
271 */
272 GLint
273 _mesa_sizeof_type(GLenum type)
274 {
275 switch (type) {
276 case GL_BITMAP:
277 return 0;
278 case GL_UNSIGNED_BYTE:
279 return sizeof(GLubyte);
280 case GL_BYTE:
281 return sizeof(GLbyte);
282 case GL_UNSIGNED_SHORT:
283 return sizeof(GLushort);
284 case GL_SHORT:
285 return sizeof(GLshort);
286 case GL_UNSIGNED_INT:
287 return sizeof(GLuint);
288 case GL_INT:
289 return sizeof(GLint);
290 case GL_FLOAT:
291 return sizeof(GLfloat);
292 case GL_DOUBLE:
293 return sizeof(GLdouble);
294 case GL_HALF_FLOAT_ARB:
295 case GL_HALF_FLOAT_OES:
296 return sizeof(GLhalfARB);
297 case GL_FIXED:
298 return sizeof(GLfixed);
299 default:
300 return -1;
301 }
302 }
303
304
305 /**
306 * Same as _mesa_sizeof_type() but also accepting the packed pixel
307 * format data types.
308 */
309 GLint
310 _mesa_sizeof_packed_type(GLenum type)
311 {
312 switch (type) {
313 case GL_BITMAP:
314 return 0;
315 case GL_UNSIGNED_BYTE:
316 return sizeof(GLubyte);
317 case GL_BYTE:
318 return sizeof(GLbyte);
319 case GL_UNSIGNED_SHORT:
320 return sizeof(GLushort);
321 case GL_SHORT:
322 return sizeof(GLshort);
323 case GL_UNSIGNED_INT:
324 return sizeof(GLuint);
325 case GL_INT:
326 return sizeof(GLint);
327 case GL_HALF_FLOAT_ARB:
328 case GL_HALF_FLOAT_OES:
329 return sizeof(GLhalfARB);
330 case GL_FLOAT:
331 return sizeof(GLfloat);
332 case GL_UNSIGNED_BYTE_3_3_2:
333 case GL_UNSIGNED_BYTE_2_3_3_REV:
334 case MESA_UNSIGNED_BYTE_4_4:
335 return sizeof(GLubyte);
336 case GL_UNSIGNED_SHORT_5_6_5:
337 case GL_UNSIGNED_SHORT_5_6_5_REV:
338 case GL_UNSIGNED_SHORT_4_4_4_4:
339 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
340 case GL_UNSIGNED_SHORT_5_5_5_1:
341 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
342 case GL_UNSIGNED_SHORT_8_8_MESA:
343 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
344 return sizeof(GLushort);
345 case GL_UNSIGNED_INT_8_8_8_8:
346 case GL_UNSIGNED_INT_8_8_8_8_REV:
347 case GL_UNSIGNED_INT_10_10_10_2:
348 case GL_UNSIGNED_INT_2_10_10_10_REV:
349 case GL_UNSIGNED_INT_24_8_EXT:
350 case GL_UNSIGNED_INT_5_9_9_9_REV:
351 case GL_UNSIGNED_INT_10F_11F_11F_REV:
352 return sizeof(GLuint);
353 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
354 return 8;
355 default:
356 return -1;
357 }
358 }
359
360
361 /**
362 * Get the number of components in a pixel format.
363 *
364 * \param format pixel format.
365 *
366 * \return the number of components in the given format, or -1 if a bad format.
367 */
368 GLint
369 _mesa_components_in_format(GLenum format)
370 {
371 switch (format) {
372 case GL_COLOR_INDEX:
373 case GL_STENCIL_INDEX:
374 case GL_DEPTH_COMPONENT:
375 case GL_RED:
376 case GL_RED_INTEGER_EXT:
377 case GL_GREEN:
378 case GL_GREEN_INTEGER_EXT:
379 case GL_BLUE:
380 case GL_BLUE_INTEGER_EXT:
381 case GL_ALPHA:
382 case GL_ALPHA_INTEGER_EXT:
383 case GL_LUMINANCE:
384 case GL_LUMINANCE_INTEGER_EXT:
385 case GL_INTENSITY:
386 return 1;
387
388 case GL_LUMINANCE_ALPHA:
389 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
390 case GL_RG:
391 case GL_YCBCR_MESA:
392 case GL_DEPTH_STENCIL_EXT:
393 case GL_RG_INTEGER:
394 return 2;
395
396 case GL_RGB:
397 case GL_BGR:
398 case GL_RGB_INTEGER_EXT:
399 case GL_BGR_INTEGER_EXT:
400 return 3;
401
402 case GL_RGBA:
403 case GL_BGRA:
404 case GL_ABGR_EXT:
405 case GL_RGBA_INTEGER_EXT:
406 case GL_BGRA_INTEGER_EXT:
407 return 4;
408
409 default:
410 return -1;
411 }
412 }
413
414
415 /**
416 * Get the bytes per pixel of pixel format type pair.
417 *
418 * \param format pixel format.
419 * \param type pixel type.
420 *
421 * \return bytes per pixel, or -1 if a bad format or type was given.
422 */
423 GLint
424 _mesa_bytes_per_pixel(GLenum format, GLenum type)
425 {
426 GLint comps = _mesa_components_in_format(format);
427 if (comps < 0)
428 return -1;
429
430 switch (type) {
431 case GL_BITMAP:
432 return 0; /* special case */
433 case GL_BYTE:
434 case GL_UNSIGNED_BYTE:
435 return comps * sizeof(GLubyte);
436 case GL_SHORT:
437 case GL_UNSIGNED_SHORT:
438 return comps * sizeof(GLshort);
439 case GL_INT:
440 case GL_UNSIGNED_INT:
441 return comps * sizeof(GLint);
442 case GL_FLOAT:
443 return comps * sizeof(GLfloat);
444 case GL_HALF_FLOAT_ARB:
445 case GL_HALF_FLOAT_OES:
446 return comps * sizeof(GLhalfARB);
447 case GL_UNSIGNED_BYTE_3_3_2:
448 case GL_UNSIGNED_BYTE_2_3_3_REV:
449 if (format == GL_RGB || format == GL_BGR ||
450 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
451 return sizeof(GLubyte);
452 else
453 return -1; /* error */
454 case GL_UNSIGNED_SHORT_5_6_5:
455 case GL_UNSIGNED_SHORT_5_6_5_REV:
456 if (format == GL_RGB || format == GL_BGR ||
457 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
458 return sizeof(GLushort);
459 else
460 return -1; /* error */
461 case GL_UNSIGNED_SHORT_4_4_4_4:
462 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
463 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
464 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
465 return sizeof(GLushort);
466 else
467 return -1;
468 case GL_UNSIGNED_SHORT_5_5_5_1:
469 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
470 if (format == GL_RGBA || format == GL_BGRA ||
471 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
472 return sizeof(GLushort);
473 else
474 return -1;
475 case GL_UNSIGNED_INT_8_8_8_8:
476 case GL_UNSIGNED_INT_8_8_8_8_REV:
477 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
478 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
479 format == GL_RGB)
480 return sizeof(GLuint);
481 else
482 return -1;
483 case GL_UNSIGNED_INT_10_10_10_2:
484 case GL_UNSIGNED_INT_2_10_10_10_REV:
485 if (format == GL_RGBA || format == GL_BGRA ||
486 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
487 format == GL_RGB)
488 return sizeof(GLuint);
489 else
490 return -1;
491 case GL_UNSIGNED_SHORT_8_8_MESA:
492 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
493 if (format == GL_YCBCR_MESA)
494 return sizeof(GLushort);
495 else
496 return -1;
497 case GL_UNSIGNED_INT_24_8_EXT:
498 if (format == GL_DEPTH_COMPONENT ||
499 format == GL_DEPTH_STENCIL_EXT)
500 return sizeof(GLuint);
501 else
502 return -1;
503 case GL_UNSIGNED_INT_5_9_9_9_REV:
504 if (format == GL_RGB)
505 return sizeof(GLuint);
506 else
507 return -1;
508 case GL_UNSIGNED_INT_10F_11F_11F_REV:
509 if (format == GL_RGB)
510 return sizeof(GLuint);
511 else
512 return -1;
513 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
514 if (format == GL_DEPTH_STENCIL)
515 return 8;
516 else
517 return -1;
518 default:
519 return -1;
520 }
521 }
522
523
524 /**
525 * Get the number of bytes for a vertex attrib with the given number of
526 * components and type.
527 *
528 * \param comps number of components.
529 * \param type data type.
530 *
531 * \return bytes per attribute, or -1 if a bad comps/type combination was given.
532 */
533 GLint
534 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
535 {
536 switch (type) {
537 case GL_BYTE:
538 case GL_UNSIGNED_BYTE:
539 return comps * sizeof(GLubyte);
540 case GL_SHORT:
541 case GL_UNSIGNED_SHORT:
542 return comps * sizeof(GLshort);
543 case GL_INT:
544 case GL_UNSIGNED_INT:
545 return comps * sizeof(GLint);
546 case GL_FLOAT:
547 return comps * sizeof(GLfloat);
548 case GL_HALF_FLOAT_ARB:
549 return comps * sizeof(GLhalfARB);
550 case GL_DOUBLE:
551 return comps * sizeof(GLdouble);
552 case GL_FIXED:
553 return comps * sizeof(GLfixed);
554 case GL_INT_2_10_10_10_REV:
555 case GL_UNSIGNED_INT_2_10_10_10_REV:
556 if (comps == 4)
557 return sizeof(GLuint);
558 else
559 return -1;
560 case GL_UNSIGNED_INT_10F_11F_11F_REV:
561 if (comps == 3)
562 return sizeof(GLuint);
563 else
564 return -1;
565 default:
566 return -1;
567 }
568 }
569
570 /**
571 * Test if the given format is unsized.
572 */
573 GLboolean
574 _mesa_is_enum_format_unsized(GLenum format)
575 {
576 switch (format) {
577 case GL_RGBA:
578 case GL_BGRA:
579 case GL_ABGR_EXT:
580 case GL_RGB:
581 case GL_BGR:
582 case GL_RG:
583 case GL_RED:
584 case GL_GREEN:
585 case GL_BLUE:
586 case GL_ALPHA:
587 case GL_INTENSITY:
588 case GL_LUMINANCE:
589 case GL_LUMINANCE_ALPHA:
590
591 case GL_SRGB:
592 case GL_SRGB_ALPHA:
593 case GL_SLUMINANCE:
594 case GL_SLUMINANCE_ALPHA:
595
596 case GL_RGBA_SNORM:
597 case GL_RGB_SNORM:
598 case GL_RG_SNORM:
599 case GL_RED_SNORM:
600 case GL_ALPHA_SNORM:
601 case GL_INTENSITY_SNORM:
602 case GL_LUMINANCE_SNORM:
603 case GL_LUMINANCE_ALPHA_SNORM:
604
605 case GL_RED_INTEGER:
606 case GL_GREEN_INTEGER:
607 case GL_BLUE_INTEGER:
608 case GL_ALPHA_INTEGER:
609 case GL_RGB_INTEGER:
610 case GL_RGBA_INTEGER:
611 case GL_BGR_INTEGER:
612 case GL_BGRA_INTEGER:
613 case GL_RG_INTEGER:
614 case GL_LUMINANCE_INTEGER_EXT:
615 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
616
617 case GL_DEPTH_COMPONENT:
618 case GL_DEPTH_STENCIL:
619 case GL_STENCIL_INDEX:
620 return GL_TRUE;
621 default:
622 return GL_FALSE;
623 }
624 }
625
626 /**
627 * Test if the given format is a UNORM (unsigned-normalized) format.
628 */
629 GLboolean
630 _mesa_is_enum_format_unorm(GLenum format)
631 {
632 switch(format) {
633 case GL_RED:
634 case GL_GREEN:
635 case GL_BLUE:
636 case GL_ALPHA:
637 case GL_ALPHA4:
638 case GL_ALPHA8:
639 case GL_ALPHA12:
640 case GL_ALPHA16:
641 case 1:
642 case GL_LUMINANCE:
643 case GL_SLUMINANCE:
644 case GL_LUMINANCE4:
645 case GL_LUMINANCE8:
646 case GL_LUMINANCE12:
647 case GL_LUMINANCE16:
648 case 2:
649 case GL_LUMINANCE_ALPHA:
650 case GL_SLUMINANCE_ALPHA:
651 case GL_LUMINANCE4_ALPHA4:
652 case GL_LUMINANCE6_ALPHA2:
653 case GL_LUMINANCE8_ALPHA8:
654 case GL_LUMINANCE12_ALPHA4:
655 case GL_LUMINANCE12_ALPHA12:
656 case GL_LUMINANCE16_ALPHA16:
657 case GL_INTENSITY:
658 case GL_INTENSITY4:
659 case GL_INTENSITY8:
660 case GL_INTENSITY12:
661 case GL_INTENSITY16:
662 case GL_R8:
663 case GL_R16:
664 case GL_RG:
665 case GL_RG8:
666 case GL_RG16:
667 case 3:
668 case GL_RGB:
669 case GL_BGR:
670 case GL_SRGB:
671 case GL_R3_G3_B2:
672 case GL_RGB4:
673 case GL_RGB5:
674 case GL_RGB565:
675 case GL_RGB8:
676 case GL_RGB10:
677 case GL_RGB12:
678 case GL_RGB16:
679 case 4:
680 case GL_ABGR_EXT:
681 case GL_RGBA:
682 case GL_BGRA:
683 case GL_SRGB_ALPHA:
684 case GL_RGBA2:
685 case GL_RGBA4:
686 case GL_RGB5_A1:
687 case GL_RGBA8:
688 case GL_RGB10_A2:
689 case GL_RGBA12:
690 case GL_RGBA16:
691 return GL_TRUE;
692 default:
693 return GL_FALSE;
694 }
695 }
696
697 /**
698 * Test if the given format is a SNORM (signed-normalized) format.
699 */
700 GLboolean
701 _mesa_is_enum_format_snorm(GLenum format)
702 {
703 switch (format) {
704 /* signed, normalized texture formats */
705 case GL_RED_SNORM:
706 case GL_R8_SNORM:
707 case GL_R16_SNORM:
708 case GL_RG_SNORM:
709 case GL_RG8_SNORM:
710 case GL_RG16_SNORM:
711 case GL_RGB_SNORM:
712 case GL_RGB8_SNORM:
713 case GL_RGB16_SNORM:
714 case GL_RGBA_SNORM:
715 case GL_RGBA8_SNORM:
716 case GL_RGBA16_SNORM:
717 case GL_ALPHA_SNORM:
718 case GL_ALPHA8_SNORM:
719 case GL_ALPHA16_SNORM:
720 case GL_LUMINANCE_SNORM:
721 case GL_LUMINANCE8_SNORM:
722 case GL_LUMINANCE16_SNORM:
723 case GL_LUMINANCE_ALPHA_SNORM:
724 case GL_LUMINANCE8_ALPHA8_SNORM:
725 case GL_LUMINANCE16_ALPHA16_SNORM:
726 case GL_INTENSITY_SNORM:
727 case GL_INTENSITY8_SNORM:
728 case GL_INTENSITY16_SNORM:
729 return GL_TRUE;
730 default:
731 return GL_FALSE;
732 }
733 }
734
735 /**
736 * Test if the given format is an integer (non-normalized) format.
737 */
738 GLboolean
739 _mesa_is_enum_format_unsigned_int(GLenum format)
740 {
741 switch (format) {
742 /* specific integer formats */
743 case GL_RGBA32UI_EXT:
744 case GL_RGB32UI_EXT:
745 case GL_RG32UI:
746 case GL_R32UI:
747 case GL_ALPHA32UI_EXT:
748 case GL_INTENSITY32UI_EXT:
749 case GL_LUMINANCE32UI_EXT:
750 case GL_LUMINANCE_ALPHA32UI_EXT:
751 case GL_RGBA16UI_EXT:
752 case GL_RGB16UI_EXT:
753 case GL_RG16UI:
754 case GL_R16UI:
755 case GL_ALPHA16UI_EXT:
756 case GL_INTENSITY16UI_EXT:
757 case GL_LUMINANCE16UI_EXT:
758 case GL_LUMINANCE_ALPHA16UI_EXT:
759 case GL_RGBA8UI_EXT:
760 case GL_RGB8UI_EXT:
761 case GL_RG8UI:
762 case GL_R8UI:
763 case GL_ALPHA8UI_EXT:
764 case GL_INTENSITY8UI_EXT:
765 case GL_LUMINANCE8UI_EXT:
766 case GL_LUMINANCE_ALPHA8UI_EXT:
767 case GL_RGB10_A2UI:
768 return GL_TRUE;
769 default:
770 return GL_FALSE;
771 }
772 }
773
774
775 /**
776 * Test if the given format is an integer (non-normalized) format.
777 */
778 GLboolean
779 _mesa_is_enum_format_signed_int(GLenum format)
780 {
781 switch (format) {
782 /* generic integer formats */
783 case GL_RED_INTEGER_EXT:
784 case GL_GREEN_INTEGER_EXT:
785 case GL_BLUE_INTEGER_EXT:
786 case GL_ALPHA_INTEGER_EXT:
787 case GL_RGB_INTEGER_EXT:
788 case GL_RGBA_INTEGER_EXT:
789 case GL_BGR_INTEGER_EXT:
790 case GL_BGRA_INTEGER_EXT:
791 case GL_LUMINANCE_INTEGER_EXT:
792 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
793 case GL_RG_INTEGER:
794 /* specific integer formats */
795 case GL_RGBA32I_EXT:
796 case GL_RGB32I_EXT:
797 case GL_RG32I:
798 case GL_R32I:
799 case GL_ALPHA32I_EXT:
800 case GL_INTENSITY32I_EXT:
801 case GL_LUMINANCE32I_EXT:
802 case GL_LUMINANCE_ALPHA32I_EXT:
803 case GL_RGBA16I_EXT:
804 case GL_RGB16I_EXT:
805 case GL_RG16I:
806 case GL_R16I:
807 case GL_ALPHA16I_EXT:
808 case GL_INTENSITY16I_EXT:
809 case GL_LUMINANCE16I_EXT:
810 case GL_LUMINANCE_ALPHA16I_EXT:
811 case GL_RGBA8I_EXT:
812 case GL_RGB8I_EXT:
813 case GL_RG8I:
814 case GL_R8I:
815 case GL_ALPHA8I_EXT:
816 case GL_INTENSITY8I_EXT:
817 case GL_LUMINANCE8I_EXT:
818 case GL_LUMINANCE_ALPHA8I_EXT:
819 return GL_TRUE;
820 default:
821 return GL_FALSE;
822 }
823 }
824
825 /**
826 * Test if the given format is an ASTC format.
827 */
828 GLboolean
829 _mesa_is_astc_format(GLenum internalFormat)
830 {
831 switch (internalFormat) {
832 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
833 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
834 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
835 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
844 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
845 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
846 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
847 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
848 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
858 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
859 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
860 return true;
861 default:
862 return false;
863 }
864 }
865
866
867 /**
868 * Test if the given format is an integer (non-normalized) format.
869 */
870 GLboolean
871 _mesa_is_enum_format_integer(GLenum format)
872 {
873 return _mesa_is_enum_format_unsigned_int(format) ||
874 _mesa_is_enum_format_signed_int(format);
875 }
876
877
878 GLboolean
879 _mesa_is_type_unsigned(GLenum type)
880 {
881 switch (type) {
882 case GL_UNSIGNED_INT:
883 case GL_UNSIGNED_INT_8_8_8_8:
884 case GL_UNSIGNED_INT_8_8_8_8_REV:
885 case GL_UNSIGNED_INT_10_10_10_2:
886 case GL_UNSIGNED_INT_2_10_10_10_REV:
887
888 case GL_UNSIGNED_SHORT:
889 case GL_UNSIGNED_SHORT_4_4_4_4:
890 case GL_UNSIGNED_SHORT_5_5_5_1:
891 case GL_UNSIGNED_SHORT_5_6_5:
892 case GL_UNSIGNED_SHORT_5_6_5_REV:
893 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
894 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
895 case GL_UNSIGNED_SHORT_8_8_MESA:
896 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
897
898 case GL_UNSIGNED_BYTE:
899 case GL_UNSIGNED_BYTE_3_3_2:
900 case GL_UNSIGNED_BYTE_2_3_3_REV:
901 return GL_TRUE;
902
903 default:
904 return GL_FALSE;
905 }
906 }
907
908
909 /**
910 * Test if the given image format is a color/RGBA format (i.e., not color
911 * index, depth, stencil, etc).
912 * \param format the image format value (may by an internal texture format)
913 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
914 */
915 GLboolean
916 _mesa_is_color_format(GLenum format)
917 {
918 switch (format) {
919 case GL_RED:
920 case GL_GREEN:
921 case GL_BLUE:
922 case GL_ALPHA:
923 case GL_ALPHA4:
924 case GL_ALPHA8:
925 case GL_ALPHA12:
926 case GL_ALPHA16:
927 case 1:
928 case GL_LUMINANCE:
929 case GL_LUMINANCE4:
930 case GL_LUMINANCE8:
931 case GL_LUMINANCE12:
932 case GL_LUMINANCE16:
933 case 2:
934 case GL_LUMINANCE_ALPHA:
935 case GL_LUMINANCE4_ALPHA4:
936 case GL_LUMINANCE6_ALPHA2:
937 case GL_LUMINANCE8_ALPHA8:
938 case GL_LUMINANCE12_ALPHA4:
939 case GL_LUMINANCE12_ALPHA12:
940 case GL_LUMINANCE16_ALPHA16:
941 case GL_INTENSITY:
942 case GL_INTENSITY4:
943 case GL_INTENSITY8:
944 case GL_INTENSITY12:
945 case GL_INTENSITY16:
946 case GL_R8:
947 case GL_R16:
948 case GL_RG:
949 case GL_RG8:
950 case GL_RG16:
951 case 3:
952 case GL_RGB:
953 case GL_BGR:
954 case GL_R3_G3_B2:
955 case GL_RGB4:
956 case GL_RGB5:
957 case GL_RGB565:
958 case GL_RGB8:
959 case GL_RGB10:
960 case GL_RGB12:
961 case GL_RGB16:
962 case 4:
963 case GL_ABGR_EXT:
964 case GL_RGBA:
965 case GL_BGRA:
966 case GL_RGBA2:
967 case GL_RGBA4:
968 case GL_RGB5_A1:
969 case GL_RGBA8:
970 case GL_RGB10_A2:
971 case GL_RGBA12:
972 case GL_RGBA16:
973 /* float texture formats */
974 case GL_ALPHA16F_ARB:
975 case GL_ALPHA32F_ARB:
976 case GL_LUMINANCE16F_ARB:
977 case GL_LUMINANCE32F_ARB:
978 case GL_LUMINANCE_ALPHA16F_ARB:
979 case GL_LUMINANCE_ALPHA32F_ARB:
980 case GL_INTENSITY16F_ARB:
981 case GL_INTENSITY32F_ARB:
982 case GL_R16F:
983 case GL_R32F:
984 case GL_RG16F:
985 case GL_RG32F:
986 case GL_RGB16F_ARB:
987 case GL_RGB32F_ARB:
988 case GL_RGBA16F_ARB:
989 case GL_RGBA32F_ARB:
990 /* compressed formats */
991 case GL_COMPRESSED_ALPHA:
992 case GL_COMPRESSED_LUMINANCE:
993 case GL_COMPRESSED_LUMINANCE_ALPHA:
994 case GL_COMPRESSED_INTENSITY:
995 case GL_COMPRESSED_RED:
996 case GL_COMPRESSED_RG:
997 case GL_COMPRESSED_RGB:
998 case GL_COMPRESSED_RGBA:
999 case GL_RGB_S3TC:
1000 case GL_RGB4_S3TC:
1001 case GL_RGBA_S3TC:
1002 case GL_RGBA4_S3TC:
1003 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1004 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1005 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1006 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1007 case GL_COMPRESSED_RGB_FXT1_3DFX:
1008 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1009 case GL_SRGB_EXT:
1010 case GL_SRGB8_EXT:
1011 case GL_SRGB_ALPHA_EXT:
1012 case GL_SRGB8_ALPHA8_EXT:
1013 case GL_SLUMINANCE_ALPHA_EXT:
1014 case GL_SLUMINANCE8_ALPHA8_EXT:
1015 case GL_SLUMINANCE_EXT:
1016 case GL_SLUMINANCE8_EXT:
1017 case GL_COMPRESSED_SRGB_EXT:
1018 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1019 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1020 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1021 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1022 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1023 case GL_COMPRESSED_SLUMINANCE_EXT:
1024 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1025 case GL_COMPRESSED_RED_RGTC1:
1026 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1027 case GL_COMPRESSED_RG_RGTC2:
1028 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1029 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1030 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1031 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1032 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1033 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1034 case GL_ETC1_RGB8_OES:
1035 case GL_COMPRESSED_RGB8_ETC2:
1036 case GL_COMPRESSED_SRGB8_ETC2:
1037 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1038 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1039 case GL_COMPRESSED_R11_EAC:
1040 case GL_COMPRESSED_RG11_EAC:
1041 case GL_COMPRESSED_SIGNED_R11_EAC:
1042 case GL_COMPRESSED_SIGNED_RG11_EAC:
1043 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1044 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1045 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1046 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1047 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1048 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1049 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1050 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1051 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1052 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1053 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1054 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1055 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1056 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1057 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1058 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1059 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1060 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1061 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1062 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1063 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1064 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1065 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1066 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1067 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1068 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1069 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1070 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1071 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1072 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1073 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1074 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1075 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1076 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1077 /* generic integer formats */
1078 case GL_RED_INTEGER_EXT:
1079 case GL_GREEN_INTEGER_EXT:
1080 case GL_BLUE_INTEGER_EXT:
1081 case GL_ALPHA_INTEGER_EXT:
1082 case GL_RGB_INTEGER_EXT:
1083 case GL_RGBA_INTEGER_EXT:
1084 case GL_BGR_INTEGER_EXT:
1085 case GL_BGRA_INTEGER_EXT:
1086 case GL_RG_INTEGER:
1087 case GL_LUMINANCE_INTEGER_EXT:
1088 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1089 /* sized integer formats */
1090 case GL_RGBA32UI_EXT:
1091 case GL_RGB32UI_EXT:
1092 case GL_RG32UI:
1093 case GL_R32UI:
1094 case GL_ALPHA32UI_EXT:
1095 case GL_INTENSITY32UI_EXT:
1096 case GL_LUMINANCE32UI_EXT:
1097 case GL_LUMINANCE_ALPHA32UI_EXT:
1098 case GL_RGBA16UI_EXT:
1099 case GL_RGB16UI_EXT:
1100 case GL_RG16UI:
1101 case GL_R16UI:
1102 case GL_ALPHA16UI_EXT:
1103 case GL_INTENSITY16UI_EXT:
1104 case GL_LUMINANCE16UI_EXT:
1105 case GL_LUMINANCE_ALPHA16UI_EXT:
1106 case GL_RGBA8UI_EXT:
1107 case GL_RGB8UI_EXT:
1108 case GL_RG8UI:
1109 case GL_R8UI:
1110 case GL_ALPHA8UI_EXT:
1111 case GL_INTENSITY8UI_EXT:
1112 case GL_LUMINANCE8UI_EXT:
1113 case GL_LUMINANCE_ALPHA8UI_EXT:
1114 case GL_RGBA32I_EXT:
1115 case GL_RGB32I_EXT:
1116 case GL_RG32I:
1117 case GL_R32I:
1118 case GL_ALPHA32I_EXT:
1119 case GL_INTENSITY32I_EXT:
1120 case GL_LUMINANCE32I_EXT:
1121 case GL_LUMINANCE_ALPHA32I_EXT:
1122 case GL_RGBA16I_EXT:
1123 case GL_RGB16I_EXT:
1124 case GL_RG16I:
1125 case GL_R16I:
1126 case GL_ALPHA16I_EXT:
1127 case GL_INTENSITY16I_EXT:
1128 case GL_LUMINANCE16I_EXT:
1129 case GL_LUMINANCE_ALPHA16I_EXT:
1130 case GL_RGBA8I_EXT:
1131 case GL_RGB8I_EXT:
1132 case GL_RG8I:
1133 case GL_R8I:
1134 case GL_ALPHA8I_EXT:
1135 case GL_INTENSITY8I_EXT:
1136 case GL_LUMINANCE8I_EXT:
1137 case GL_LUMINANCE_ALPHA8I_EXT:
1138 /* signed, normalized texture formats */
1139 case GL_RED_SNORM:
1140 case GL_R8_SNORM:
1141 case GL_R16_SNORM:
1142 case GL_RG_SNORM:
1143 case GL_RG8_SNORM:
1144 case GL_RG16_SNORM:
1145 case GL_RGB_SNORM:
1146 case GL_RGB8_SNORM:
1147 case GL_RGB16_SNORM:
1148 case GL_RGBA_SNORM:
1149 case GL_RGBA8_SNORM:
1150 case GL_RGBA16_SNORM:
1151 case GL_ALPHA_SNORM:
1152 case GL_ALPHA8_SNORM:
1153 case GL_ALPHA16_SNORM:
1154 case GL_LUMINANCE_SNORM:
1155 case GL_LUMINANCE8_SNORM:
1156 case GL_LUMINANCE16_SNORM:
1157 case GL_LUMINANCE_ALPHA_SNORM:
1158 case GL_LUMINANCE8_ALPHA8_SNORM:
1159 case GL_LUMINANCE16_ALPHA16_SNORM:
1160 case GL_INTENSITY_SNORM:
1161 case GL_INTENSITY8_SNORM:
1162 case GL_INTENSITY16_SNORM:
1163 case GL_RGB9_E5:
1164 case GL_R11F_G11F_B10F:
1165 case GL_RGB10_A2UI:
1166 return GL_TRUE;
1167 case GL_YCBCR_MESA: /* not considered to be RGB */
1168 /* fall-through */
1169 default:
1170 return GL_FALSE;
1171 }
1172 }
1173
1174
1175 /**
1176 * Test if the given image format is a depth component format.
1177 */
1178 GLboolean
1179 _mesa_is_depth_format(GLenum format)
1180 {
1181 switch (format) {
1182 case GL_DEPTH_COMPONENT:
1183 case GL_DEPTH_COMPONENT16:
1184 case GL_DEPTH_COMPONENT24:
1185 case GL_DEPTH_COMPONENT32:
1186 case GL_DEPTH_COMPONENT32F:
1187 return GL_TRUE;
1188 default:
1189 return GL_FALSE;
1190 }
1191 }
1192
1193
1194 /**
1195 * Test if the given image format is a stencil format.
1196 */
1197 GLboolean
1198 _mesa_is_stencil_format(GLenum format)
1199 {
1200 switch (format) {
1201 case GL_STENCIL_INDEX:
1202 return GL_TRUE;
1203 default:
1204 return GL_FALSE;
1205 }
1206 }
1207
1208
1209 /**
1210 * Test if the given image format is a YCbCr format.
1211 */
1212 GLboolean
1213 _mesa_is_ycbcr_format(GLenum format)
1214 {
1215 switch (format) {
1216 case GL_YCBCR_MESA:
1217 return GL_TRUE;
1218 default:
1219 return GL_FALSE;
1220 }
1221 }
1222
1223
1224 /**
1225 * Test if the given image format is a depth+stencil format.
1226 */
1227 GLboolean
1228 _mesa_is_depthstencil_format(GLenum format)
1229 {
1230 switch (format) {
1231 case GL_DEPTH24_STENCIL8_EXT:
1232 case GL_DEPTH_STENCIL_EXT:
1233 case GL_DEPTH32F_STENCIL8:
1234 return GL_TRUE;
1235 default:
1236 return GL_FALSE;
1237 }
1238 }
1239
1240
1241 /**
1242 * Test if the given image format is a depth or stencil format.
1243 */
1244 GLboolean
1245 _mesa_is_depth_or_stencil_format(GLenum format)
1246 {
1247 switch (format) {
1248 case GL_DEPTH_COMPONENT:
1249 case GL_DEPTH_COMPONENT16:
1250 case GL_DEPTH_COMPONENT24:
1251 case GL_DEPTH_COMPONENT32:
1252 case GL_STENCIL_INDEX:
1253 case GL_STENCIL_INDEX1_EXT:
1254 case GL_STENCIL_INDEX4_EXT:
1255 case GL_STENCIL_INDEX8_EXT:
1256 case GL_STENCIL_INDEX16_EXT:
1257 case GL_DEPTH_STENCIL_EXT:
1258 case GL_DEPTH24_STENCIL8_EXT:
1259 case GL_DEPTH_COMPONENT32F:
1260 case GL_DEPTH32F_STENCIL8:
1261 return GL_TRUE;
1262 default:
1263 return GL_FALSE;
1264 }
1265 }
1266
1267
1268 /**
1269 * Test if an image format is a supported compressed format.
1270 * \param format the internal format token provided by the user.
1271 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1272 */
1273 GLboolean
1274 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1275 {
1276 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1277
1278 /* Some formats in this switch have an equivalent mesa_format_layout
1279 * to the compressed formats in the layout switch below and thus
1280 * must be handled first.
1281 */
1282 switch (format) {
1283 case GL_RGB_S3TC:
1284 case GL_RGB4_S3TC:
1285 case GL_RGBA_S3TC:
1286 case GL_RGBA4_S3TC:
1287 return _mesa_is_desktop_gl(ctx) &&
1288 ctx->Extensions.ANGLE_texture_compression_dxt;
1289 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1290 return ctx->API == API_OPENGL_COMPAT
1291 && ctx->Extensions.ATI_texture_compression_3dc;
1292 case GL_PALETTE4_RGB8_OES:
1293 case GL_PALETTE4_RGBA8_OES:
1294 case GL_PALETTE4_R5_G6_B5_OES:
1295 case GL_PALETTE4_RGBA4_OES:
1296 case GL_PALETTE4_RGB5_A1_OES:
1297 case GL_PALETTE8_RGB8_OES:
1298 case GL_PALETTE8_RGBA8_OES:
1299 case GL_PALETTE8_R5_G6_B5_OES:
1300 case GL_PALETTE8_RGBA4_OES:
1301 case GL_PALETTE8_RGB5_A1_OES:
1302 return ctx->API == API_OPENGLES;
1303 }
1304
1305 switch (_mesa_get_format_layout(m_format)) {
1306 case MESA_FORMAT_LAYOUT_S3TC:
1307 if (_mesa_get_format_color_encoding(m_format) == GL_LINEAR) {
1308 /* Assume that the ANGLE flag will always be set if the
1309 * EXT flag is set.
1310 */
1311 return ctx->Extensions.ANGLE_texture_compression_dxt;
1312 } else {
1313 return _mesa_is_desktop_gl(ctx)
1314 && ctx->Extensions.EXT_texture_sRGB
1315 && ctx->Extensions.EXT_texture_compression_s3tc;
1316 }
1317 case MESA_FORMAT_LAYOUT_FXT1:
1318 return _mesa_is_desktop_gl(ctx)
1319 && ctx->Extensions.TDFX_texture_compression_FXT1;
1320 case MESA_FORMAT_LAYOUT_RGTC:
1321 return _mesa_is_desktop_gl(ctx)
1322 && ctx->Extensions.ARB_texture_compression_rgtc;
1323 case MESA_FORMAT_LAYOUT_LATC:
1324 return ctx->API == API_OPENGL_COMPAT
1325 && ctx->Extensions.EXT_texture_compression_latc;
1326 case MESA_FORMAT_LAYOUT_ETC1:
1327 return _mesa_is_gles(ctx)
1328 && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
1329 case MESA_FORMAT_LAYOUT_ETC2:
1330 return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
1331 case MESA_FORMAT_LAYOUT_BPTC:
1332 return _mesa_is_desktop_gl(ctx) &&
1333 ctx->Extensions.ARB_texture_compression_bptc;
1334 case MESA_FORMAT_LAYOUT_ASTC:
1335 return ctx->Extensions.KHR_texture_compression_astc_ldr;
1336 default:
1337 return GL_FALSE;
1338 }
1339 }
1340
1341 /**
1342 * Convert various unpack formats to the corresponding base format.
1343 */
1344 GLenum
1345 _mesa_unpack_format_to_base_format(GLenum format)
1346 {
1347 switch(format) {
1348 case GL_RED_INTEGER:
1349 return GL_RED;
1350 case GL_GREEN_INTEGER:
1351 return GL_GREEN;
1352 case GL_BLUE_INTEGER:
1353 return GL_BLUE;
1354 case GL_ALPHA_INTEGER:
1355 return GL_ALPHA;
1356 case GL_RG_INTEGER:
1357 return GL_RG;
1358 case GL_RGB_INTEGER:
1359 return GL_RGB;
1360 case GL_RGBA_INTEGER:
1361 return GL_RGBA;
1362 case GL_BGR_INTEGER:
1363 return GL_BGR;
1364 case GL_BGRA_INTEGER:
1365 return GL_BGRA;
1366 case GL_LUMINANCE_INTEGER_EXT:
1367 return GL_LUMINANCE;
1368 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1369 return GL_LUMINANCE_ALPHA;
1370 case GL_RED:
1371 case GL_GREEN:
1372 case GL_BLUE:
1373 case GL_RG:
1374 case GL_RGB:
1375 case GL_RGBA:
1376 case GL_BGR:
1377 case GL_BGRA:
1378 case GL_ALPHA:
1379 case GL_LUMINANCE:
1380 case GL_LUMINANCE_ALPHA:
1381 default:
1382 return format;
1383 }
1384 }
1385
1386 /**
1387 * Convert various base formats to the corresponding integer format.
1388 */
1389 GLenum
1390 _mesa_base_format_to_integer_format(GLenum format)
1391 {
1392 switch(format) {
1393 case GL_RED:
1394 return GL_RED_INTEGER;
1395 case GL_GREEN:
1396 return GL_GREEN_INTEGER;
1397 case GL_BLUE:
1398 return GL_BLUE_INTEGER;
1399 case GL_RG:
1400 return GL_RG_INTEGER;
1401 case GL_RGB:
1402 return GL_RGB_INTEGER;
1403 case GL_RGBA:
1404 return GL_RGBA_INTEGER;
1405 case GL_BGR:
1406 return GL_BGR_INTEGER;
1407 case GL_BGRA:
1408 return GL_BGRA_INTEGER;
1409 case GL_ALPHA:
1410 return GL_ALPHA_INTEGER;
1411 case GL_LUMINANCE:
1412 return GL_LUMINANCE_INTEGER_EXT;
1413 case GL_LUMINANCE_ALPHA:
1414 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1415 }
1416
1417 return format;
1418 }
1419
1420
1421 /**
1422 * Does the given base texture/renderbuffer format have the channel
1423 * named by 'pname'?
1424 */
1425 GLboolean
1426 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1427 {
1428 switch (pname) {
1429 case GL_TEXTURE_RED_SIZE:
1430 case GL_TEXTURE_RED_TYPE:
1431 case GL_RENDERBUFFER_RED_SIZE_EXT:
1432 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1433 if (base_format == GL_RED ||
1434 base_format == GL_RG ||
1435 base_format == GL_RGB ||
1436 base_format == GL_RGBA) {
1437 return GL_TRUE;
1438 }
1439 return GL_FALSE;
1440 case GL_TEXTURE_GREEN_SIZE:
1441 case GL_TEXTURE_GREEN_TYPE:
1442 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1443 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1444 if (base_format == GL_RG ||
1445 base_format == GL_RGB ||
1446 base_format == GL_RGBA) {
1447 return GL_TRUE;
1448 }
1449 return GL_FALSE;
1450 case GL_TEXTURE_BLUE_SIZE:
1451 case GL_TEXTURE_BLUE_TYPE:
1452 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1453 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1454 if (base_format == GL_RGB ||
1455 base_format == GL_RGBA) {
1456 return GL_TRUE;
1457 }
1458 return GL_FALSE;
1459 case GL_TEXTURE_ALPHA_SIZE:
1460 case GL_TEXTURE_ALPHA_TYPE:
1461 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1462 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1463 if (base_format == GL_RGBA ||
1464 base_format == GL_ALPHA ||
1465 base_format == GL_LUMINANCE_ALPHA) {
1466 return GL_TRUE;
1467 }
1468 return GL_FALSE;
1469 case GL_TEXTURE_LUMINANCE_SIZE:
1470 case GL_TEXTURE_LUMINANCE_TYPE:
1471 if (base_format == GL_LUMINANCE ||
1472 base_format == GL_LUMINANCE_ALPHA) {
1473 return GL_TRUE;
1474 }
1475 return GL_FALSE;
1476 case GL_TEXTURE_INTENSITY_SIZE:
1477 case GL_TEXTURE_INTENSITY_TYPE:
1478 if (base_format == GL_INTENSITY) {
1479 return GL_TRUE;
1480 }
1481 return GL_FALSE;
1482 case GL_TEXTURE_DEPTH_SIZE:
1483 case GL_TEXTURE_DEPTH_TYPE:
1484 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1485 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1486 if (base_format == GL_DEPTH_STENCIL ||
1487 base_format == GL_DEPTH_COMPONENT) {
1488 return GL_TRUE;
1489 }
1490 return GL_FALSE;
1491 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1492 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1493 if (base_format == GL_DEPTH_STENCIL ||
1494 base_format == GL_STENCIL_INDEX) {
1495 return GL_TRUE;
1496 }
1497 return GL_FALSE;
1498 default:
1499 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1500 __func__, pname);
1501 return GL_FALSE;
1502 }
1503
1504 return GL_FALSE;
1505 }
1506
1507
1508 /**
1509 * Returns the number of channels/components for a base format.
1510 */
1511 GLint
1512 _mesa_base_format_component_count(GLenum base_format)
1513 {
1514 switch (base_format) {
1515 case GL_RED:
1516 case GL_ALPHA:
1517 case GL_INTENSITY:
1518 case GL_DEPTH_COMPONENT:
1519 return 1;
1520 case GL_RG:
1521 case GL_LUMINANCE_ALPHA:
1522 case GL_DEPTH_STENCIL:
1523 return 2;
1524 case GL_RGB:
1525 return 3;
1526 case GL_RGBA:
1527 return 4;
1528 default:
1529 return -1;
1530 }
1531 }
1532
1533
1534 /**
1535 * If format is a generic compressed format, return the corresponding
1536 * non-compressed format. For other formats, return the format as-is.
1537 */
1538 GLenum
1539 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1540 {
1541 switch (format) {
1542 case GL_COMPRESSED_RED:
1543 return GL_RED;
1544 case GL_COMPRESSED_RG:
1545 return GL_RG;
1546 case GL_COMPRESSED_RGB:
1547 return GL_RGB;
1548 case GL_COMPRESSED_RGBA:
1549 return GL_RGBA;
1550 case GL_COMPRESSED_ALPHA:
1551 return GL_ALPHA;
1552 case GL_COMPRESSED_LUMINANCE:
1553 return GL_LUMINANCE;
1554 case GL_COMPRESSED_LUMINANCE_ALPHA:
1555 return GL_LUMINANCE_ALPHA;
1556 case GL_COMPRESSED_INTENSITY:
1557 return GL_INTENSITY;
1558 /* sRGB formats */
1559 case GL_COMPRESSED_SRGB:
1560 return GL_SRGB;
1561 case GL_COMPRESSED_SRGB_ALPHA:
1562 return GL_SRGB_ALPHA;
1563 case GL_COMPRESSED_SLUMINANCE:
1564 return GL_SLUMINANCE;
1565 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1566 return GL_SLUMINANCE_ALPHA;
1567 default:
1568 return format;
1569 }
1570 }
1571
1572
1573 /**
1574 * Return the equivalent non-generic internal format.
1575 * This is useful for comparing whether two internal formats are equivalent.
1576 */
1577 GLenum
1578 _mesa_get_nongeneric_internalformat(GLenum format)
1579 {
1580 switch (format) {
1581 /* GL 1.1 formats. */
1582 case 4:
1583 case GL_RGBA:
1584 return GL_RGBA8;
1585 case 3:
1586 case GL_RGB:
1587 return GL_RGB8;
1588 case 2:
1589 case GL_LUMINANCE_ALPHA:
1590 return GL_LUMINANCE8_ALPHA8;
1591 case 1:
1592 case GL_LUMINANCE:
1593 return GL_LUMINANCE8;
1594 case GL_ALPHA:
1595 return GL_ALPHA8;
1596 case GL_INTENSITY:
1597 return GL_INTENSITY8;
1598
1599 /* GL_ARB_texture_rg */
1600 case GL_RED:
1601 return GL_R8;
1602 case GL_RG:
1603 return GL_RG8;
1604
1605 /* GL_EXT_texture_sRGB */
1606 case GL_SRGB:
1607 return GL_SRGB8;
1608 case GL_SRGB_ALPHA:
1609 return GL_SRGB8_ALPHA8;
1610 case GL_SLUMINANCE:
1611 return GL_SLUMINANCE8;
1612 case GL_SLUMINANCE_ALPHA:
1613 return GL_SLUMINANCE8_ALPHA8;
1614
1615 /* GL_EXT_texture_snorm */
1616 case GL_RGBA_SNORM:
1617 return GL_RGBA8_SNORM;
1618 case GL_RGB_SNORM:
1619 return GL_RGB8_SNORM;
1620 case GL_RG_SNORM:
1621 return GL_RG8_SNORM;
1622 case GL_RED_SNORM:
1623 return GL_R8_SNORM;
1624 case GL_LUMINANCE_ALPHA_SNORM:
1625 return GL_LUMINANCE8_ALPHA8_SNORM;
1626 case GL_LUMINANCE_SNORM:
1627 return GL_LUMINANCE8_SNORM;
1628 case GL_ALPHA_SNORM:
1629 return GL_ALPHA8_SNORM;
1630 case GL_INTENSITY_SNORM:
1631 return GL_INTENSITY8_SNORM;
1632
1633 default:
1634 return format;
1635 }
1636 }
1637
1638
1639 /**
1640 * Convert an sRGB internal format to linear.
1641 */
1642 GLenum
1643 _mesa_get_linear_internalformat(GLenum format)
1644 {
1645 switch (format) {
1646 case GL_SRGB:
1647 return GL_RGB;
1648 case GL_SRGB_ALPHA:
1649 return GL_RGBA;
1650 case GL_SRGB8:
1651 return GL_RGB8;
1652 case GL_SRGB8_ALPHA8:
1653 return GL_RGBA8;
1654 case GL_SLUMINANCE8:
1655 return GL_LUMINANCE8;
1656 case GL_SLUMINANCE:
1657 return GL_LUMINANCE;
1658 case GL_SLUMINANCE_ALPHA:
1659 return GL_LUMINANCE_ALPHA;
1660 case GL_SLUMINANCE8_ALPHA8:
1661 return GL_LUMINANCE8_ALPHA8;
1662 default:
1663 return format;
1664 }
1665 }
1666
1667
1668 /**
1669 * Do error checking of format/type combinations for glReadPixels,
1670 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1671 * and type values, we may either generate GL_INVALID_OPERATION or
1672 * GL_INVALID_ENUM.
1673 *
1674 * \param format pixel format.
1675 * \param type pixel type.
1676 *
1677 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1678 */
1679 GLenum
1680 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1681 GLenum format, GLenum type)
1682 {
1683 /* From OpenGL 3.3 spec, page 220:
1684 * "If the format is DEPTH_STENCIL, then values are taken from
1685 * both the depth buffer and the stencil buffer. If there is no
1686 * depth buffer or if there is no stencil buffer, then the error
1687 * INVALID_OPERATION occurs. If the type parameter is not
1688 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1689 * error INVALID_ENUM occurs."
1690 *
1691 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1692 * cannot be used to read depth or stencil in that API.
1693 */
1694 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1695 && type != GL_UNSIGNED_INT_24_8
1696 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1697 return GL_INVALID_ENUM;
1698
1699 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1700 switch (type) {
1701 case GL_BITMAP:
1702 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1703 return GL_INVALID_ENUM;
1704 }
1705 break;
1706
1707 case GL_UNSIGNED_BYTE_3_3_2:
1708 case GL_UNSIGNED_BYTE_2_3_3_REV:
1709 case GL_UNSIGNED_SHORT_5_6_5:
1710 case GL_UNSIGNED_SHORT_5_6_5_REV:
1711 if (format == GL_RGB) {
1712 break; /* OK */
1713 }
1714 if (format == GL_RGB_INTEGER_EXT &&
1715 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1716 break; /* OK */
1717 }
1718 return GL_INVALID_OPERATION;
1719
1720 case GL_UNSIGNED_SHORT_4_4_4_4:
1721 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1722 case GL_UNSIGNED_INT_8_8_8_8:
1723 case GL_UNSIGNED_INT_8_8_8_8_REV:
1724 if (format == GL_RGBA ||
1725 format == GL_BGRA ||
1726 format == GL_ABGR_EXT) {
1727 break; /* OK */
1728 }
1729 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1730 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1731 break; /* OK */
1732 }
1733 return GL_INVALID_OPERATION;
1734
1735 case GL_UNSIGNED_SHORT_5_5_5_1:
1736 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1737 case GL_UNSIGNED_INT_10_10_10_2:
1738 case GL_UNSIGNED_INT_2_10_10_10_REV:
1739 if (format == GL_RGBA ||
1740 format == GL_BGRA) {
1741 break; /* OK */
1742 }
1743 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1744 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1745 break; /* OK */
1746 }
1747 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1748 ctx->API == API_OPENGLES2) {
1749 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1750 }
1751 return GL_INVALID_OPERATION;
1752
1753 case GL_UNSIGNED_INT_24_8:
1754 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1755 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1756 return GL_NO_ERROR;
1757
1758 if (format != GL_DEPTH_STENCIL) {
1759 return GL_INVALID_OPERATION;
1760 }
1761 return GL_NO_ERROR;
1762
1763 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1764 if (!ctx->Extensions.ARB_depth_buffer_float) {
1765 return GL_INVALID_ENUM;
1766 }
1767 if (format != GL_DEPTH_STENCIL) {
1768 return GL_INVALID_OPERATION;
1769 }
1770 return GL_NO_ERROR;
1771
1772 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1773 if (!ctx->Extensions.EXT_packed_float) {
1774 return GL_INVALID_ENUM;
1775 }
1776 if (format != GL_RGB) {
1777 return GL_INVALID_OPERATION;
1778 }
1779 return GL_NO_ERROR;
1780
1781 case GL_HALF_FLOAT_OES:
1782 switch (format) {
1783 case GL_RGBA:
1784 case GL_RGB:
1785 case GL_LUMINANCE_ALPHA:
1786 case GL_LUMINANCE:
1787 case GL_ALPHA:
1788 return GL_NO_ERROR;
1789 case GL_RG:
1790 case GL_RED:
1791 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1792 return GL_NO_ERROR;
1793 default:
1794 return GL_INVALID_OPERATION;
1795 }
1796
1797 default:
1798 ; /* fall-through */
1799 }
1800
1801 /* now, for each format, check the type for compatibility */
1802 switch (format) {
1803 case GL_COLOR_INDEX:
1804 case GL_STENCIL_INDEX:
1805 switch (type) {
1806 case GL_BITMAP:
1807 case GL_BYTE:
1808 case GL_UNSIGNED_BYTE:
1809 case GL_SHORT:
1810 case GL_UNSIGNED_SHORT:
1811 case GL_INT:
1812 case GL_UNSIGNED_INT:
1813 case GL_FLOAT:
1814 case GL_HALF_FLOAT:
1815 return GL_NO_ERROR;
1816 default:
1817 return GL_INVALID_ENUM;
1818 }
1819
1820 case GL_RED:
1821 case GL_GREEN:
1822 case GL_BLUE:
1823 case GL_ALPHA:
1824 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1825 case GL_INTENSITY:
1826 #endif
1827 case GL_LUMINANCE:
1828 case GL_LUMINANCE_ALPHA:
1829 case GL_DEPTH_COMPONENT:
1830 switch (type) {
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_RG:
1845 if (!ctx->Extensions.ARB_texture_rg)
1846 return GL_INVALID_ENUM;
1847 switch (type) {
1848 case GL_BYTE:
1849 case GL_UNSIGNED_BYTE:
1850 case GL_SHORT:
1851 case GL_UNSIGNED_SHORT:
1852 case GL_INT:
1853 case GL_UNSIGNED_INT:
1854 case GL_FLOAT:
1855 case GL_HALF_FLOAT:
1856 return GL_NO_ERROR;
1857 default:
1858 return GL_INVALID_ENUM;
1859 }
1860
1861 case GL_RGB:
1862 switch (type) {
1863 case GL_BYTE:
1864 case GL_UNSIGNED_BYTE:
1865 case GL_SHORT:
1866 case GL_UNSIGNED_SHORT:
1867 case GL_INT:
1868 case GL_UNSIGNED_INT:
1869 case GL_FLOAT:
1870 case GL_UNSIGNED_BYTE_3_3_2:
1871 case GL_UNSIGNED_BYTE_2_3_3_REV:
1872 case GL_UNSIGNED_SHORT_5_6_5:
1873 case GL_UNSIGNED_SHORT_5_6_5_REV:
1874 case GL_HALF_FLOAT:
1875 return GL_NO_ERROR;
1876 case GL_UNSIGNED_INT_2_10_10_10_REV:
1877 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1878 return (ctx->API == API_OPENGLES2)
1879 ? GL_NO_ERROR : GL_INVALID_ENUM;
1880 case GL_UNSIGNED_INT_5_9_9_9_REV:
1881 return ctx->Extensions.EXT_texture_shared_exponent
1882 ? GL_NO_ERROR : GL_INVALID_ENUM;
1883 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1884 return ctx->Extensions.EXT_packed_float
1885 ? GL_NO_ERROR : GL_INVALID_ENUM;
1886 default:
1887 return GL_INVALID_ENUM;
1888 }
1889
1890 case GL_BGR:
1891 switch (type) {
1892 /* NOTE: no packed types are supported with BGR. That's
1893 * intentional, according to the GL spec.
1894 */
1895 case GL_BYTE:
1896 case GL_UNSIGNED_BYTE:
1897 case GL_SHORT:
1898 case GL_UNSIGNED_SHORT:
1899 case GL_INT:
1900 case GL_UNSIGNED_INT:
1901 case GL_FLOAT:
1902 case GL_HALF_FLOAT:
1903 return GL_NO_ERROR;
1904 default:
1905 return GL_INVALID_ENUM;
1906 }
1907
1908 case GL_RGBA:
1909 case GL_BGRA:
1910 switch (type) {
1911 case GL_BYTE:
1912 case GL_UNSIGNED_BYTE:
1913 case GL_SHORT:
1914 case GL_UNSIGNED_SHORT:
1915 case GL_INT:
1916 case GL_UNSIGNED_INT:
1917 case GL_FLOAT:
1918 case GL_UNSIGNED_SHORT_4_4_4_4:
1919 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1920 case GL_UNSIGNED_SHORT_5_5_5_1:
1921 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1922 case GL_UNSIGNED_INT_8_8_8_8:
1923 case GL_UNSIGNED_INT_8_8_8_8_REV:
1924 case GL_UNSIGNED_INT_10_10_10_2:
1925 case GL_UNSIGNED_INT_2_10_10_10_REV:
1926 case GL_HALF_FLOAT:
1927 return GL_NO_ERROR;
1928 default:
1929 return GL_INVALID_ENUM;
1930 }
1931
1932 case GL_ABGR_EXT:
1933 switch (type) {
1934 case GL_BYTE:
1935 case GL_UNSIGNED_BYTE:
1936 case GL_SHORT:
1937 case GL_UNSIGNED_SHORT:
1938 case GL_INT:
1939 case GL_UNSIGNED_INT:
1940 case GL_FLOAT:
1941 case GL_UNSIGNED_SHORT_4_4_4_4:
1942 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1943 case GL_UNSIGNED_INT_8_8_8_8:
1944 case GL_UNSIGNED_INT_8_8_8_8_REV:
1945 case GL_HALF_FLOAT:
1946 return GL_NO_ERROR;
1947 default:
1948 return GL_INVALID_ENUM;
1949 }
1950
1951 case GL_YCBCR_MESA:
1952 if (!ctx->Extensions.MESA_ycbcr_texture)
1953 return GL_INVALID_ENUM;
1954 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
1955 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
1956 return GL_NO_ERROR;
1957 else
1958 return GL_INVALID_OPERATION;
1959
1960 case GL_DEPTH_STENCIL:
1961 if (type == GL_UNSIGNED_INT_24_8)
1962 return GL_NO_ERROR;
1963 else if (ctx->Extensions.ARB_depth_buffer_float &&
1964 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1965 return GL_NO_ERROR;
1966 else
1967 return GL_INVALID_ENUM;
1968
1969 /* integer-valued formats */
1970 case GL_RED_INTEGER_EXT:
1971 case GL_GREEN_INTEGER_EXT:
1972 case GL_BLUE_INTEGER_EXT:
1973 case GL_ALPHA_INTEGER_EXT:
1974 case GL_RG_INTEGER:
1975 switch (type) {
1976 case GL_BYTE:
1977 case GL_UNSIGNED_BYTE:
1978 case GL_SHORT:
1979 case GL_UNSIGNED_SHORT:
1980 case GL_INT:
1981 case GL_UNSIGNED_INT:
1982 return (ctx->Version >= 30 ||
1983 ctx->Extensions.EXT_texture_integer)
1984 ? GL_NO_ERROR : GL_INVALID_ENUM;
1985 default:
1986 return GL_INVALID_ENUM;
1987 }
1988
1989 case GL_RGB_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->Version >= 30 ||
1998 ctx->Extensions.EXT_texture_integer)
1999 ? GL_NO_ERROR : GL_INVALID_ENUM;
2000 case GL_UNSIGNED_BYTE_3_3_2:
2001 case GL_UNSIGNED_BYTE_2_3_3_REV:
2002 case GL_UNSIGNED_SHORT_5_6_5:
2003 case GL_UNSIGNED_SHORT_5_6_5_REV:
2004 return ctx->Extensions.ARB_texture_rgb10_a2ui
2005 ? GL_NO_ERROR : GL_INVALID_ENUM;
2006 default:
2007 return GL_INVALID_ENUM;
2008 }
2009
2010 case GL_BGR_INTEGER_EXT:
2011 switch (type) {
2012 case GL_BYTE:
2013 case GL_UNSIGNED_BYTE:
2014 case GL_SHORT:
2015 case GL_UNSIGNED_SHORT:
2016 case GL_INT:
2017 case GL_UNSIGNED_INT:
2018 /* NOTE: no packed formats w/ BGR format */
2019 return (ctx->Version >= 30 ||
2020 ctx->Extensions.EXT_texture_integer)
2021 ? GL_NO_ERROR : GL_INVALID_ENUM;
2022 default:
2023 return GL_INVALID_ENUM;
2024 }
2025
2026 case GL_RGBA_INTEGER_EXT:
2027 case GL_BGRA_INTEGER_EXT:
2028 switch (type) {
2029 case GL_BYTE:
2030 case GL_UNSIGNED_BYTE:
2031 case GL_SHORT:
2032 case GL_UNSIGNED_SHORT:
2033 case GL_INT:
2034 case GL_UNSIGNED_INT:
2035 return (ctx->Version >= 30 ||
2036 ctx->Extensions.EXT_texture_integer)
2037 ? GL_NO_ERROR : GL_INVALID_ENUM;
2038 case GL_UNSIGNED_SHORT_4_4_4_4:
2039 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2040 case GL_UNSIGNED_SHORT_5_5_5_1:
2041 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2042 case GL_UNSIGNED_INT_8_8_8_8:
2043 case GL_UNSIGNED_INT_8_8_8_8_REV:
2044 case GL_UNSIGNED_INT_10_10_10_2:
2045 case GL_UNSIGNED_INT_2_10_10_10_REV:
2046 return ctx->Extensions.ARB_texture_rgb10_a2ui
2047 ? GL_NO_ERROR : GL_INVALID_ENUM;
2048 default:
2049 return GL_INVALID_ENUM;
2050 }
2051
2052 case GL_LUMINANCE_INTEGER_EXT:
2053 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2054 switch (type) {
2055 case GL_BYTE:
2056 case GL_UNSIGNED_BYTE:
2057 case GL_SHORT:
2058 case GL_UNSIGNED_SHORT:
2059 case GL_INT:
2060 case GL_UNSIGNED_INT:
2061 return ctx->Extensions.EXT_texture_integer
2062 ? GL_NO_ERROR : GL_INVALID_ENUM;
2063 default:
2064 return GL_INVALID_ENUM;
2065 }
2066
2067 default:
2068 return GL_INVALID_ENUM;
2069 }
2070 return GL_NO_ERROR;
2071 }
2072
2073
2074 /**
2075 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2076 * and glTex[Sub]Image.
2077 * \return error code, or GL_NO_ERROR.
2078 */
2079 GLenum
2080 _mesa_es_error_check_format_and_type(GLenum format, GLenum type,
2081 unsigned dimensions)
2082 {
2083 GLboolean type_valid = GL_TRUE;
2084
2085 switch (format) {
2086 case GL_ALPHA:
2087 case GL_LUMINANCE:
2088 case GL_LUMINANCE_ALPHA:
2089 type_valid = (type == GL_UNSIGNED_BYTE
2090 || type == GL_FLOAT
2091 || type == GL_HALF_FLOAT_OES);
2092 break;
2093
2094 case GL_RGB:
2095 type_valid = (type == GL_UNSIGNED_BYTE
2096 || type == GL_UNSIGNED_SHORT_5_6_5
2097 || type == GL_FLOAT
2098 || type == GL_HALF_FLOAT_OES);
2099 break;
2100
2101 case GL_RGBA:
2102 type_valid = (type == GL_UNSIGNED_BYTE
2103 || type == GL_UNSIGNED_SHORT_4_4_4_4
2104 || type == GL_UNSIGNED_SHORT_5_5_5_1
2105 || type == GL_FLOAT
2106 || type == GL_HALF_FLOAT_OES
2107 || type == GL_UNSIGNED_INT_2_10_10_10_REV);
2108 break;
2109
2110 case GL_DEPTH_COMPONENT:
2111 /* This format is filtered against invalid dimensionalities elsewhere.
2112 */
2113 type_valid = (type == GL_UNSIGNED_SHORT
2114 || type == GL_UNSIGNED_INT);
2115 break;
2116
2117 case GL_DEPTH_STENCIL:
2118 /* This format is filtered against invalid dimensionalities elsewhere.
2119 */
2120 type_valid = (type == GL_UNSIGNED_INT_24_8);
2121 break;
2122
2123 case GL_BGRA_EXT:
2124 type_valid = (type == GL_UNSIGNED_BYTE);
2125
2126 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2127 * the format does not appear to be allowed for 3D textures in OpenGL
2128 * ES.
2129 */
2130 if (dimensions != 2)
2131 return GL_INVALID_VALUE;
2132
2133 break;
2134
2135 default:
2136 return GL_INVALID_VALUE;
2137 }
2138
2139 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2140 }
2141
2142
2143 /**
2144 * Do error checking of format/type combinations for OpenGL ES 3
2145 * glTex[Sub]Image.
2146 * \return error code, or GL_NO_ERROR.
2147 */
2148 GLenum
2149 _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
2150 GLenum format, GLenum type,
2151 GLenum internalFormat)
2152 {
2153 switch (format) {
2154 case GL_RGBA:
2155 switch (type) {
2156 case GL_UNSIGNED_BYTE:
2157 switch (internalFormat) {
2158 case GL_RGBA:
2159 case GL_RGBA8:
2160 case GL_RGB5_A1:
2161 case GL_RGBA4:
2162 case GL_SRGB8_ALPHA8_EXT:
2163 break;
2164 default:
2165 return GL_INVALID_OPERATION;
2166 }
2167 break;
2168
2169 case GL_BYTE:
2170 if (internalFormat != GL_RGBA8_SNORM)
2171 return GL_INVALID_OPERATION;
2172 break;
2173
2174 case GL_UNSIGNED_SHORT_4_4_4_4:
2175 switch (internalFormat) {
2176 case GL_RGBA:
2177 case GL_RGBA4:
2178 break;
2179 default:
2180 return GL_INVALID_OPERATION;
2181 }
2182 break;
2183
2184 case GL_UNSIGNED_SHORT_5_5_5_1:
2185 switch (internalFormat) {
2186 case GL_RGBA:
2187 case GL_RGB5_A1:
2188 break;
2189 default:
2190 return GL_INVALID_OPERATION;
2191 }
2192 break;
2193
2194 case GL_UNSIGNED_INT_2_10_10_10_REV:
2195 switch (internalFormat) {
2196 case GL_RGBA: /* GL_EXT_texture_type_2_10_10_10_REV */
2197 case GL_RGB10_A2:
2198 case GL_RGB5_A1:
2199 break;
2200 default:
2201 return GL_INVALID_OPERATION;
2202 }
2203 break;
2204
2205 case GL_HALF_FLOAT:
2206 if (internalFormat != GL_RGBA16F)
2207 return GL_INVALID_OPERATION;
2208 break;
2209
2210 case GL_FLOAT:
2211 switch (internalFormat) {
2212 case GL_RGBA16F:
2213 case GL_RGBA32F:
2214 break;
2215 case GL_RGBA:
2216 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2217 break;
2218 default:
2219 return GL_INVALID_OPERATION;
2220 }
2221 break;
2222
2223 case GL_HALF_FLOAT_OES:
2224 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2225 break;
2226 default:
2227 return GL_INVALID_OPERATION;
2228 }
2229 break;
2230
2231 case GL_RGBA_INTEGER:
2232 switch (type) {
2233 case GL_UNSIGNED_BYTE:
2234 if (internalFormat != GL_RGBA8UI)
2235 return GL_INVALID_OPERATION;
2236 break;
2237
2238 case GL_BYTE:
2239 if (internalFormat != GL_RGBA8I)
2240 return GL_INVALID_OPERATION;
2241 break;
2242
2243 case GL_UNSIGNED_SHORT:
2244 if (internalFormat != GL_RGBA16UI)
2245 return GL_INVALID_OPERATION;
2246 break;
2247
2248 case GL_SHORT:
2249 if (internalFormat != GL_RGBA16I)
2250 return GL_INVALID_OPERATION;
2251 break;
2252
2253 case GL_UNSIGNED_INT:
2254 if (internalFormat != GL_RGBA32UI)
2255 return GL_INVALID_OPERATION;
2256 break;
2257
2258 case GL_INT:
2259 if (internalFormat != GL_RGBA32I)
2260 return GL_INVALID_OPERATION;
2261 break;
2262
2263 case GL_UNSIGNED_INT_2_10_10_10_REV:
2264 if (internalFormat != GL_RGB10_A2UI)
2265 return GL_INVALID_OPERATION;
2266 break;
2267
2268 default:
2269 return GL_INVALID_OPERATION;
2270 }
2271 break;
2272
2273 case GL_RGB:
2274 switch (type) {
2275 case GL_UNSIGNED_BYTE:
2276 switch (internalFormat) {
2277 case GL_RGB:
2278 case GL_RGB8:
2279 case GL_RGB565:
2280 case GL_SRGB8:
2281 break;
2282 default:
2283 return GL_INVALID_OPERATION;
2284 }
2285 break;
2286
2287 case GL_BYTE:
2288 if (internalFormat != GL_RGB8_SNORM)
2289 return GL_INVALID_OPERATION;
2290 break;
2291
2292 case GL_UNSIGNED_SHORT_5_6_5:
2293 switch (internalFormat) {
2294 case GL_RGB:
2295 case GL_RGB565:
2296 break;
2297 default:
2298 return GL_INVALID_OPERATION;
2299 }
2300 break;
2301
2302 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2303 if (internalFormat != GL_R11F_G11F_B10F)
2304 return GL_INVALID_OPERATION;
2305 break;
2306
2307 case GL_UNSIGNED_INT_5_9_9_9_REV:
2308 if (internalFormat != GL_RGB9_E5)
2309 return GL_INVALID_OPERATION;
2310 break;
2311
2312 case GL_HALF_FLOAT:
2313 switch (internalFormat) {
2314 case GL_RGB16F:
2315 case GL_R11F_G11F_B10F:
2316 case GL_RGB9_E5:
2317 break;
2318 default:
2319 return GL_INVALID_OPERATION;
2320 }
2321 break;
2322
2323 case GL_FLOAT:
2324 switch (internalFormat) {
2325 case GL_RGB16F:
2326 case GL_RGB32F:
2327 case GL_R11F_G11F_B10F:
2328 case GL_RGB9_E5:
2329 break;
2330 case GL_RGB:
2331 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2332 break;
2333 default:
2334 return GL_INVALID_OPERATION;
2335 }
2336 break;
2337
2338 case GL_HALF_FLOAT_OES:
2339 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
2340 return GL_INVALID_OPERATION;
2341 break;
2342
2343 case GL_UNSIGNED_INT_2_10_10_10_REV:
2344 switch (internalFormat) {
2345 case GL_RGB: /* GL_EXT_texture_type_2_10_10_10_REV */
2346 break;
2347 default:
2348 return GL_INVALID_OPERATION;
2349 }
2350 break;
2351
2352 default:
2353 return GL_INVALID_OPERATION;
2354 }
2355 break;
2356
2357 case GL_RGB_INTEGER:
2358 switch (type) {
2359 case GL_UNSIGNED_BYTE:
2360 if (internalFormat != GL_RGB8UI)
2361 return GL_INVALID_OPERATION;
2362 break;
2363
2364 case GL_BYTE:
2365 if (internalFormat != GL_RGB8I)
2366 return GL_INVALID_OPERATION;
2367 break;
2368
2369 case GL_UNSIGNED_SHORT:
2370 if (internalFormat != GL_RGB16UI)
2371 return GL_INVALID_OPERATION;
2372 break;
2373
2374 case GL_SHORT:
2375 if (internalFormat != GL_RGB16I)
2376 return GL_INVALID_OPERATION;
2377 break;
2378
2379 case GL_UNSIGNED_INT:
2380 if (internalFormat != GL_RGB32UI)
2381 return GL_INVALID_OPERATION;
2382 break;
2383
2384 case GL_INT:
2385 if (internalFormat != GL_RGB32I)
2386 return GL_INVALID_OPERATION;
2387 break;
2388
2389 default:
2390 return GL_INVALID_OPERATION;
2391 }
2392 break;
2393
2394 case GL_RG:
2395 switch (type) {
2396 case GL_UNSIGNED_BYTE:
2397 if (internalFormat != GL_RG8)
2398 return GL_INVALID_OPERATION;
2399 break;
2400
2401 case GL_BYTE:
2402 if (internalFormat != GL_RG8_SNORM)
2403 return GL_INVALID_OPERATION;
2404 break;
2405
2406 case GL_HALF_FLOAT:
2407 case GL_HALF_FLOAT_OES:
2408 switch (internalFormat) {
2409 case GL_RG16F:
2410 break;
2411 case GL_RG:
2412 if (ctx->Extensions.ARB_texture_rg &&
2413 ctx->Extensions.OES_texture_half_float)
2414 break;
2415 /* fallthrough */
2416 default:
2417 return GL_INVALID_OPERATION;
2418 }
2419 break;
2420
2421 case GL_FLOAT:
2422 switch (internalFormat) {
2423 case GL_RG16F:
2424 case GL_RG32F:
2425 break;
2426 case GL_RG:
2427 if (ctx->Extensions.ARB_texture_rg &&
2428 ctx->Extensions.OES_texture_float)
2429 break;
2430 /* fallthrough */
2431 default:
2432 return GL_INVALID_OPERATION;
2433 }
2434 break;
2435
2436 default:
2437 return GL_INVALID_OPERATION;
2438 }
2439 break;
2440
2441 case GL_RG_INTEGER:
2442 switch (type) {
2443 case GL_UNSIGNED_BYTE:
2444 if (internalFormat != GL_RG8UI)
2445 return GL_INVALID_OPERATION;
2446 break;
2447
2448 case GL_BYTE:
2449 if (internalFormat != GL_RG8I)
2450 return GL_INVALID_OPERATION;
2451 break;
2452
2453 case GL_UNSIGNED_SHORT:
2454 if (internalFormat != GL_RG16UI)
2455 return GL_INVALID_OPERATION;
2456 break;
2457
2458 case GL_SHORT:
2459 if (internalFormat != GL_RG16I)
2460 return GL_INVALID_OPERATION;
2461 break;
2462
2463 case GL_UNSIGNED_INT:
2464 if (internalFormat != GL_RG32UI)
2465 return GL_INVALID_OPERATION;
2466 break;
2467
2468 case GL_INT:
2469 if (internalFormat != GL_RG32I)
2470 return GL_INVALID_OPERATION;
2471 break;
2472
2473 default:
2474 return GL_INVALID_OPERATION;
2475 }
2476 break;
2477
2478 case GL_RED:
2479 switch (type) {
2480 case GL_UNSIGNED_BYTE:
2481 if (internalFormat != GL_R8)
2482 return GL_INVALID_OPERATION;
2483 break;
2484
2485 case GL_BYTE:
2486 if (internalFormat != GL_R8_SNORM)
2487 return GL_INVALID_OPERATION;
2488 break;
2489
2490 case GL_HALF_FLOAT:
2491 case GL_HALF_FLOAT_OES:
2492 switch (internalFormat) {
2493 case GL_R16F:
2494 break;
2495 case GL_RG:
2496 case GL_RED:
2497 if (ctx->Extensions.ARB_texture_rg &&
2498 ctx->Extensions.OES_texture_half_float)
2499 break;
2500 /* fallthrough */
2501 default:
2502 return GL_INVALID_OPERATION;
2503 }
2504 break;
2505
2506 case GL_FLOAT:
2507 switch (internalFormat) {
2508 case GL_R16F:
2509 case GL_R32F:
2510 break;
2511 case GL_RED:
2512 if (ctx->Extensions.ARB_texture_rg &&
2513 ctx->Extensions.OES_texture_float)
2514 break;
2515 /* fallthrough */
2516 default:
2517 return GL_INVALID_OPERATION;
2518 }
2519 break;
2520
2521 default:
2522 return GL_INVALID_OPERATION;
2523 }
2524 break;
2525
2526 case GL_RED_INTEGER:
2527 switch (type) {
2528 case GL_UNSIGNED_BYTE:
2529 if (internalFormat != GL_R8UI)
2530 return GL_INVALID_OPERATION;
2531 break;
2532
2533 case GL_BYTE:
2534 if (internalFormat != GL_R8I)
2535 return GL_INVALID_OPERATION;
2536 break;
2537
2538 case GL_UNSIGNED_SHORT:
2539 if (internalFormat != GL_R16UI)
2540 return GL_INVALID_OPERATION;
2541 break;
2542
2543 case GL_SHORT:
2544 if (internalFormat != GL_R16I)
2545 return GL_INVALID_OPERATION;
2546 break;
2547
2548 case GL_UNSIGNED_INT:
2549 if (internalFormat != GL_R32UI)
2550 return GL_INVALID_OPERATION;
2551 break;
2552
2553 case GL_INT:
2554 if (internalFormat != GL_R32I)
2555 return GL_INVALID_OPERATION;
2556 break;
2557
2558 default:
2559 return GL_INVALID_OPERATION;
2560 }
2561 break;
2562
2563 case GL_DEPTH_COMPONENT:
2564 switch (type) {
2565 case GL_UNSIGNED_SHORT:
2566 if (internalFormat != GL_DEPTH_COMPONENT
2567 && internalFormat != GL_DEPTH_COMPONENT16)
2568 return GL_INVALID_OPERATION;
2569 break;
2570
2571 case GL_UNSIGNED_INT:
2572 switch (internalFormat) {
2573 case GL_DEPTH_COMPONENT:
2574 case GL_DEPTH_COMPONENT16:
2575 case GL_DEPTH_COMPONENT24:
2576 break;
2577 default:
2578 return GL_INVALID_OPERATION;
2579 }
2580 break;
2581
2582 case GL_FLOAT:
2583 if (internalFormat != GL_DEPTH_COMPONENT32F)
2584 return GL_INVALID_OPERATION;
2585 break;
2586
2587 default:
2588 return GL_INVALID_OPERATION;
2589 }
2590 break;
2591
2592 case GL_DEPTH_STENCIL:
2593 switch (type) {
2594 case GL_UNSIGNED_INT_24_8:
2595 if (internalFormat != GL_DEPTH_STENCIL
2596 && internalFormat != GL_DEPTH24_STENCIL8)
2597 return GL_INVALID_OPERATION;
2598 break;
2599
2600 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2601 if (internalFormat != GL_DEPTH32F_STENCIL8)
2602 return GL_INVALID_OPERATION;
2603 break;
2604
2605 default:
2606 return GL_INVALID_OPERATION;
2607 }
2608 break;
2609
2610 case GL_ALPHA:
2611 case GL_LUMINANCE:
2612 case GL_LUMINANCE_ALPHA:
2613 switch (type) {
2614 case GL_FLOAT:
2615 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2616 break;
2617 case GL_HALF_FLOAT_OES:
2618 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2619 break;
2620 default:
2621 if (type != GL_UNSIGNED_BYTE || format != internalFormat)
2622 return GL_INVALID_OPERATION;
2623 }
2624 }
2625
2626 return GL_NO_ERROR;
2627 }
2628
2629 static void
2630 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
2631 {
2632 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
2633 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
2634 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
2635 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
2636 }
2637
2638 static bool
2639 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
2640 {
2641 switch (format) {
2642 case GL_RGBA:
2643 case GL_RGBA_INTEGER_EXT:
2644 set_swizzle(swizzle, 0, 1, 2, 3);
2645 return true;
2646 case GL_BGRA:
2647 case GL_BGRA_INTEGER_EXT:
2648 set_swizzle(swizzle, 2, 1, 0, 3);
2649 return true;
2650 case GL_ABGR_EXT:
2651 set_swizzle(swizzle, 3, 2, 1, 0);
2652 return true;
2653 case GL_RGB:
2654 case GL_RGB_INTEGER_EXT:
2655 set_swizzle(swizzle, 0, 1, 2, 5);
2656 return true;
2657 case GL_BGR:
2658 case GL_BGR_INTEGER_EXT:
2659 set_swizzle(swizzle, 2, 1, 0, 5);
2660 return true;
2661 case GL_LUMINANCE_ALPHA:
2662 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2663 set_swizzle(swizzle, 0, 0, 0, 1);
2664 return true;
2665 case GL_RG:
2666 case GL_RG_INTEGER:
2667 set_swizzle(swizzle, 0, 1, 4, 5);
2668 return true;
2669 case GL_RED:
2670 case GL_RED_INTEGER_EXT:
2671 set_swizzle(swizzle, 0, 4, 4, 5);
2672 return true;
2673 case GL_GREEN:
2674 case GL_GREEN_INTEGER_EXT:
2675 set_swizzle(swizzle, 4, 0, 4, 5);
2676 return true;
2677 case GL_BLUE:
2678 case GL_BLUE_INTEGER_EXT:
2679 set_swizzle(swizzle, 4, 4, 0, 5);
2680 return true;
2681 case GL_ALPHA:
2682 case GL_ALPHA_INTEGER_EXT:
2683 set_swizzle(swizzle, 4, 4, 4, 0);
2684 return true;
2685 case GL_LUMINANCE:
2686 case GL_LUMINANCE_INTEGER_EXT:
2687 set_swizzle(swizzle, 0, 0, 0, 5);
2688 return true;
2689 case GL_INTENSITY:
2690 set_swizzle(swizzle, 0, 0, 0, 0);
2691 return true;
2692 default:
2693 return false;
2694 }
2695 }
2696
2697 /**
2698 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
2699 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
2700 * otherwise (for non-array formats).
2701 *
2702 * This function will typically be used to compute a mesa format from a GL type
2703 * so we can then call _mesa_format_convert. This function does
2704 * not consider byte swapping, so it returns types assuming that no byte
2705 * swapping is involved. If byte swapping is involved then clients are supposed
2706 * to handle that on their side before calling _mesa_format_convert.
2707 *
2708 * This function returns an uint32_t that can pack a mesa_format or a
2709 * mesa_array_format. Clients must check the mesa array format bit
2710 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
2711 * format is a mesa_array_format or a mesa_format.
2712 */
2713 uint32_t
2714 _mesa_format_from_format_and_type(GLenum format, GLenum type)
2715 {
2716 bool is_array_format = true;
2717 uint8_t swizzle[4];
2718 bool normalized = false, is_float = false, is_signed = false;
2719 int num_channels = 0, type_size = 0;
2720
2721 /* Extract array format type information from the OpenGL data type */
2722 switch (type) {
2723 case GL_UNSIGNED_BYTE:
2724 type_size = 1;
2725 break;
2726 case GL_BYTE:
2727 type_size = 1;
2728 is_signed = true;
2729 break;
2730 case GL_UNSIGNED_SHORT:
2731 type_size = 2;
2732 break;
2733 case GL_SHORT:
2734 type_size = 2;
2735 is_signed = true;
2736 break;
2737 case GL_UNSIGNED_INT:
2738 type_size = 4;
2739 break;
2740 case GL_INT:
2741 type_size = 4;
2742 is_signed = true;
2743 break;
2744 case GL_HALF_FLOAT:
2745 case GL_HALF_FLOAT_OES:
2746 type_size = 2;
2747 is_signed = true;
2748 is_float = true;
2749 break;
2750 case GL_FLOAT:
2751 type_size = 4;
2752 is_signed = true;
2753 is_float = true;
2754 break;
2755 default:
2756 is_array_format = false;
2757 break;
2758 }
2759
2760 /* Extract array format swizzle information from the OpenGL format */
2761 if (is_array_format)
2762 is_array_format = get_swizzle_from_gl_format(format, swizzle);
2763
2764 /* If this is an array format type after checking data type and format,
2765 * create the array format
2766 */
2767 if (is_array_format) {
2768 normalized = !_mesa_is_enum_format_integer(format);
2769 num_channels = _mesa_components_in_format(format);
2770
2771 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
2772 normalized, num_channels,
2773 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
2774 }
2775
2776 /* Otherwise this is not an array format, so return the mesa_format
2777 * matching the OpenGL format and data type
2778 */
2779 switch (type) {
2780 case GL_UNSIGNED_SHORT_5_6_5:
2781 if (format == GL_RGB)
2782 return MESA_FORMAT_B5G6R5_UNORM;
2783 else if (format == GL_BGR)
2784 return MESA_FORMAT_R5G6B5_UNORM;
2785 else if (format == GL_RGB_INTEGER)
2786 return MESA_FORMAT_B5G6R5_UINT;
2787 break;
2788 case GL_UNSIGNED_SHORT_5_6_5_REV:
2789 if (format == GL_RGB)
2790 return MESA_FORMAT_R5G6B5_UNORM;
2791 else if (format == GL_BGR)
2792 return MESA_FORMAT_B5G6R5_UNORM;
2793 else if (format == GL_RGB_INTEGER)
2794 return MESA_FORMAT_R5G6B5_UINT;
2795 break;
2796 case GL_UNSIGNED_SHORT_4_4_4_4:
2797 if (format == GL_RGBA)
2798 return MESA_FORMAT_A4B4G4R4_UNORM;
2799 else if (format == GL_BGRA)
2800 return MESA_FORMAT_A4R4G4B4_UNORM;
2801 else if (format == GL_ABGR_EXT)
2802 return MESA_FORMAT_R4G4B4A4_UNORM;
2803 else if (format == GL_RGBA_INTEGER)
2804 return MESA_FORMAT_A4B4G4R4_UINT;
2805 else if (format == GL_BGRA_INTEGER)
2806 return MESA_FORMAT_A4R4G4B4_UINT;
2807 break;
2808 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2809 if (format == GL_RGBA)
2810 return MESA_FORMAT_R4G4B4A4_UNORM;
2811 else if (format == GL_BGRA)
2812 return MESA_FORMAT_B4G4R4A4_UNORM;
2813 else if (format == GL_ABGR_EXT)
2814 return MESA_FORMAT_A4B4G4R4_UNORM;
2815 else if (format == GL_RGBA_INTEGER)
2816 return MESA_FORMAT_R4G4B4A4_UINT;
2817 else if (format == GL_BGRA_INTEGER)
2818 return MESA_FORMAT_B4G4R4A4_UINT;
2819 break;
2820 case GL_UNSIGNED_SHORT_5_5_5_1:
2821 if (format == GL_RGBA)
2822 return MESA_FORMAT_A1B5G5R5_UNORM;
2823 else if (format == GL_BGRA)
2824 return MESA_FORMAT_A1R5G5B5_UNORM;
2825 else if (format == GL_RGBA_INTEGER)
2826 return MESA_FORMAT_A1B5G5R5_UINT;
2827 else if (format == GL_BGRA_INTEGER)
2828 return MESA_FORMAT_A1R5G5B5_UINT;
2829 break;
2830 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2831 if (format == GL_RGBA)
2832 return MESA_FORMAT_R5G5B5A1_UNORM;
2833 else if (format == GL_BGRA)
2834 return MESA_FORMAT_B5G5R5A1_UNORM;
2835 else if (format == GL_RGBA_INTEGER)
2836 return MESA_FORMAT_R5G5B5A1_UINT;
2837 else if (format == GL_BGRA_INTEGER)
2838 return MESA_FORMAT_B5G5R5A1_UINT;
2839 break;
2840 case GL_UNSIGNED_BYTE_3_3_2:
2841 if (format == GL_RGB)
2842 return MESA_FORMAT_B2G3R3_UNORM;
2843 else if (format == GL_RGB_INTEGER)
2844 return MESA_FORMAT_B2G3R3_UINT;
2845 break;
2846 case GL_UNSIGNED_BYTE_2_3_3_REV:
2847 if (format == GL_RGB)
2848 return MESA_FORMAT_R3G3B2_UNORM;
2849 else if (format == GL_RGB_INTEGER)
2850 return MESA_FORMAT_R3G3B2_UINT;
2851 break;
2852 case GL_UNSIGNED_INT_5_9_9_9_REV:
2853 if (format == GL_RGB)
2854 return MESA_FORMAT_R9G9B9E5_FLOAT;
2855 break;
2856 case GL_UNSIGNED_INT_10_10_10_2:
2857 if (format == GL_RGBA)
2858 return MESA_FORMAT_A2B10G10R10_UNORM;
2859 else if (format == GL_RGBA_INTEGER)
2860 return MESA_FORMAT_A2B10G10R10_UINT;
2861 else if (format == GL_BGRA)
2862 return MESA_FORMAT_A2R10G10B10_UNORM;
2863 else if (format == GL_BGRA_INTEGER)
2864 return MESA_FORMAT_A2R10G10B10_UINT;
2865 break;
2866 case GL_UNSIGNED_INT_2_10_10_10_REV:
2867 if (format == GL_RGB)
2868 return MESA_FORMAT_R10G10B10X2_UNORM;
2869 if (format == GL_RGBA)
2870 return MESA_FORMAT_R10G10B10A2_UNORM;
2871 else if (format == GL_RGBA_INTEGER)
2872 return MESA_FORMAT_R10G10B10A2_UINT;
2873 else if (format == GL_BGRA)
2874 return MESA_FORMAT_B10G10R10A2_UNORM;
2875 else if (format == GL_BGRA_INTEGER)
2876 return MESA_FORMAT_B10G10R10A2_UINT;
2877 break;
2878 case GL_UNSIGNED_INT_8_8_8_8:
2879 if (format == GL_RGBA)
2880 return MESA_FORMAT_A8B8G8R8_UNORM;
2881 else if (format == GL_BGRA)
2882 return MESA_FORMAT_A8R8G8B8_UNORM;
2883 else if (format == GL_ABGR_EXT)
2884 return MESA_FORMAT_R8G8B8A8_UNORM;
2885 else if (format == GL_RGBA_INTEGER)
2886 return MESA_FORMAT_A8B8G8R8_UINT;
2887 else if (format == GL_BGRA_INTEGER)
2888 return MESA_FORMAT_A8R8G8B8_UINT;
2889 break;
2890 case GL_UNSIGNED_INT_8_8_8_8_REV:
2891 if (format == GL_RGBA)
2892 return MESA_FORMAT_R8G8B8A8_UNORM;
2893 else if (format == GL_BGRA)
2894 return MESA_FORMAT_B8G8R8A8_UNORM;
2895 else if (format == GL_ABGR_EXT)
2896 return MESA_FORMAT_A8B8G8R8_UNORM;
2897 else if (format == GL_RGBA_INTEGER)
2898 return MESA_FORMAT_R8G8B8A8_UINT;
2899 else if (format == GL_BGRA_INTEGER)
2900 return MESA_FORMAT_B8G8R8A8_UINT;
2901 break;
2902 case GL_UNSIGNED_SHORT_8_8_MESA:
2903 if (format == GL_YCBCR_MESA)
2904 return MESA_FORMAT_YCBCR;
2905 break;
2906 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
2907 if (format == GL_YCBCR_MESA)
2908 return MESA_FORMAT_YCBCR_REV;
2909 break;
2910 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2911 if (format == GL_RGB)
2912 return MESA_FORMAT_R11G11B10_FLOAT;
2913 default:
2914 break;
2915 }
2916
2917 /* If we got here it means that we could not find a Mesa format that
2918 * matches the GL format/type provided. We may need to add a new Mesa
2919 * format in that case.
2920 */
2921 unreachable("Unsupported format");
2922 }