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Merge remote-tracking branch 'mesa-public/master' into vulkan
[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 * Return the simple base format for a given internal texture format.
2144 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2145 *
2146 * \param ctx GL context.
2147 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2148 *
2149 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2150 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2151 *
2152 * This is the format which is used during texture application (i.e. the
2153 * texture format and env mode determine the arithmetic used.
2154 */
2155 GLint
2156 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2157 {
2158 switch (internalFormat) {
2159 case GL_ALPHA:
2160 case GL_ALPHA4:
2161 case GL_ALPHA8:
2162 case GL_ALPHA12:
2163 case GL_ALPHA16:
2164 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2165 case 1:
2166 case GL_LUMINANCE:
2167 case GL_LUMINANCE4:
2168 case GL_LUMINANCE8:
2169 case GL_LUMINANCE12:
2170 case GL_LUMINANCE16:
2171 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2172 case 2:
2173 case GL_LUMINANCE_ALPHA:
2174 case GL_LUMINANCE4_ALPHA4:
2175 case GL_LUMINANCE6_ALPHA2:
2176 case GL_LUMINANCE8_ALPHA8:
2177 case GL_LUMINANCE12_ALPHA4:
2178 case GL_LUMINANCE12_ALPHA12:
2179 case GL_LUMINANCE16_ALPHA16:
2180 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2181 case GL_INTENSITY:
2182 case GL_INTENSITY4:
2183 case GL_INTENSITY8:
2184 case GL_INTENSITY12:
2185 case GL_INTENSITY16:
2186 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2187 case 3:
2188 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2189 case GL_RGB:
2190 case GL_R3_G3_B2:
2191 case GL_RGB4:
2192 case GL_RGB5:
2193 case GL_RGB8:
2194 case GL_RGB10:
2195 case GL_RGB12:
2196 case GL_RGB16:
2197 return GL_RGB;
2198 case 4:
2199 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2200 case GL_RGBA:
2201 case GL_RGBA2:
2202 case GL_RGBA4:
2203 case GL_RGB5_A1:
2204 case GL_RGBA8:
2205 case GL_RGB10_A2:
2206 case GL_RGBA12:
2207 case GL_RGBA16:
2208 return GL_RGBA;
2209 default:
2210 ; /* fallthrough */
2211 }
2212
2213 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2214 */
2215 if (_mesa_is_gles(ctx)) {
2216 switch (internalFormat) {
2217 case GL_BGRA:
2218 return GL_RGBA;
2219 default:
2220 ; /* fallthrough */
2221 }
2222 }
2223
2224 if (ctx->Extensions.ARB_ES2_compatibility) {
2225 switch (internalFormat) {
2226 case GL_RGB565:
2227 return GL_RGB;
2228 default:
2229 ; /* fallthrough */
2230 }
2231 }
2232
2233 if (ctx->Extensions.ARB_depth_texture) {
2234 switch (internalFormat) {
2235 case GL_DEPTH_COMPONENT:
2236 case GL_DEPTH_COMPONENT16:
2237 case GL_DEPTH_COMPONENT24:
2238 case GL_DEPTH_COMPONENT32:
2239 return GL_DEPTH_COMPONENT;
2240 case GL_DEPTH_STENCIL:
2241 case GL_DEPTH24_STENCIL8:
2242 return GL_DEPTH_STENCIL;
2243 default:
2244 ; /* fallthrough */
2245 }
2246 }
2247
2248 if (ctx->Extensions.ARB_texture_stencil8) {
2249 switch (internalFormat) {
2250 case GL_STENCIL_INDEX:
2251 case GL_STENCIL_INDEX1:
2252 case GL_STENCIL_INDEX4:
2253 case GL_STENCIL_INDEX8:
2254 case GL_STENCIL_INDEX16:
2255 return GL_STENCIL_INDEX;
2256 default:
2257 ; /* fallthrough */
2258 }
2259 }
2260
2261 switch (internalFormat) {
2262 case GL_COMPRESSED_ALPHA:
2263 return GL_ALPHA;
2264 case GL_COMPRESSED_LUMINANCE:
2265 return GL_LUMINANCE;
2266 case GL_COMPRESSED_LUMINANCE_ALPHA:
2267 return GL_LUMINANCE_ALPHA;
2268 case GL_COMPRESSED_INTENSITY:
2269 return GL_INTENSITY;
2270 case GL_COMPRESSED_RGB:
2271 return GL_RGB;
2272 case GL_COMPRESSED_RGBA:
2273 return GL_RGBA;
2274 default:
2275 ; /* fallthrough */
2276 }
2277
2278 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2279 GLenum base_compressed =
2280 _mesa_gl_compressed_format_base_format(internalFormat);
2281 if (base_compressed)
2282 return base_compressed;
2283 }
2284
2285 if (ctx->Extensions.KHR_texture_compression_astc_ldr &&
2286 _mesa_is_astc_format(internalFormat))
2287 return GL_RGBA;
2288
2289 if (ctx->Extensions.MESA_ycbcr_texture) {
2290 if (internalFormat == GL_YCBCR_MESA)
2291 return GL_YCBCR_MESA;
2292 }
2293
2294 if (ctx->Extensions.ARB_texture_float) {
2295 switch (internalFormat) {
2296 case GL_ALPHA16F_ARB:
2297 case GL_ALPHA32F_ARB:
2298 return GL_ALPHA;
2299 case GL_RGBA16F_ARB:
2300 case GL_RGBA32F_ARB:
2301 return GL_RGBA;
2302 case GL_RGB16F_ARB:
2303 case GL_RGB32F_ARB:
2304 return GL_RGB;
2305 case GL_INTENSITY16F_ARB:
2306 case GL_INTENSITY32F_ARB:
2307 return GL_INTENSITY;
2308 case GL_LUMINANCE16F_ARB:
2309 case GL_LUMINANCE32F_ARB:
2310 return GL_LUMINANCE;
2311 case GL_LUMINANCE_ALPHA16F_ARB:
2312 case GL_LUMINANCE_ALPHA32F_ARB:
2313 return GL_LUMINANCE_ALPHA;
2314 default:
2315 ; /* fallthrough */
2316 }
2317 }
2318
2319 if (ctx->Extensions.EXT_texture_snorm) {
2320 switch (internalFormat) {
2321 case GL_RED_SNORM:
2322 case GL_R8_SNORM:
2323 case GL_R16_SNORM:
2324 return GL_RED;
2325 case GL_RG_SNORM:
2326 case GL_RG8_SNORM:
2327 case GL_RG16_SNORM:
2328 return GL_RG;
2329 case GL_RGB_SNORM:
2330 case GL_RGB8_SNORM:
2331 case GL_RGB16_SNORM:
2332 return GL_RGB;
2333 case GL_RGBA_SNORM:
2334 case GL_RGBA8_SNORM:
2335 case GL_RGBA16_SNORM:
2336 return GL_RGBA;
2337 case GL_ALPHA_SNORM:
2338 case GL_ALPHA8_SNORM:
2339 case GL_ALPHA16_SNORM:
2340 return GL_ALPHA;
2341 case GL_LUMINANCE_SNORM:
2342 case GL_LUMINANCE8_SNORM:
2343 case GL_LUMINANCE16_SNORM:
2344 return GL_LUMINANCE;
2345 case GL_LUMINANCE_ALPHA_SNORM:
2346 case GL_LUMINANCE8_ALPHA8_SNORM:
2347 case GL_LUMINANCE16_ALPHA16_SNORM:
2348 return GL_LUMINANCE_ALPHA;
2349 case GL_INTENSITY_SNORM:
2350 case GL_INTENSITY8_SNORM:
2351 case GL_INTENSITY16_SNORM:
2352 return GL_INTENSITY;
2353 default:
2354 ; /* fallthrough */
2355 }
2356 }
2357
2358 if (ctx->Extensions.EXT_texture_sRGB) {
2359 switch (internalFormat) {
2360 case GL_SRGB_EXT:
2361 case GL_SRGB8_EXT:
2362 case GL_COMPRESSED_SRGB_EXT:
2363 return GL_RGB;
2364 case GL_SRGB_ALPHA_EXT:
2365 case GL_SRGB8_ALPHA8_EXT:
2366 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2367 return GL_RGBA;
2368 case GL_SLUMINANCE_ALPHA_EXT:
2369 case GL_SLUMINANCE8_ALPHA8_EXT:
2370 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2371 return GL_LUMINANCE_ALPHA;
2372 case GL_SLUMINANCE_EXT:
2373 case GL_SLUMINANCE8_EXT:
2374 case GL_COMPRESSED_SLUMINANCE_EXT:
2375 return GL_LUMINANCE;
2376 default:
2377 ; /* fallthrough */
2378 }
2379 }
2380
2381 if (ctx->Version >= 30 ||
2382 ctx->Extensions.EXT_texture_integer) {
2383 switch (internalFormat) {
2384 case GL_RGBA8UI_EXT:
2385 case GL_RGBA16UI_EXT:
2386 case GL_RGBA32UI_EXT:
2387 case GL_RGBA8I_EXT:
2388 case GL_RGBA16I_EXT:
2389 case GL_RGBA32I_EXT:
2390 case GL_RGB10_A2UI:
2391 return GL_RGBA;
2392 case GL_RGB8UI_EXT:
2393 case GL_RGB16UI_EXT:
2394 case GL_RGB32UI_EXT:
2395 case GL_RGB8I_EXT:
2396 case GL_RGB16I_EXT:
2397 case GL_RGB32I_EXT:
2398 return GL_RGB;
2399 }
2400 }
2401
2402 if (ctx->Extensions.EXT_texture_integer) {
2403 switch (internalFormat) {
2404 case GL_ALPHA8UI_EXT:
2405 case GL_ALPHA16UI_EXT:
2406 case GL_ALPHA32UI_EXT:
2407 case GL_ALPHA8I_EXT:
2408 case GL_ALPHA16I_EXT:
2409 case GL_ALPHA32I_EXT:
2410 return GL_ALPHA;
2411 case GL_INTENSITY8UI_EXT:
2412 case GL_INTENSITY16UI_EXT:
2413 case GL_INTENSITY32UI_EXT:
2414 case GL_INTENSITY8I_EXT:
2415 case GL_INTENSITY16I_EXT:
2416 case GL_INTENSITY32I_EXT:
2417 return GL_INTENSITY;
2418 case GL_LUMINANCE8UI_EXT:
2419 case GL_LUMINANCE16UI_EXT:
2420 case GL_LUMINANCE32UI_EXT:
2421 case GL_LUMINANCE8I_EXT:
2422 case GL_LUMINANCE16I_EXT:
2423 case GL_LUMINANCE32I_EXT:
2424 return GL_LUMINANCE;
2425 case GL_LUMINANCE_ALPHA8UI_EXT:
2426 case GL_LUMINANCE_ALPHA16UI_EXT:
2427 case GL_LUMINANCE_ALPHA32UI_EXT:
2428 case GL_LUMINANCE_ALPHA8I_EXT:
2429 case GL_LUMINANCE_ALPHA16I_EXT:
2430 case GL_LUMINANCE_ALPHA32I_EXT:
2431 return GL_LUMINANCE_ALPHA;
2432 default:
2433 ; /* fallthrough */
2434 }
2435 }
2436
2437 if (ctx->Extensions.ARB_texture_rg) {
2438 switch (internalFormat) {
2439 case GL_R16F:
2440 case GL_R32F:
2441 if (!ctx->Extensions.ARB_texture_float)
2442 break;
2443 return GL_RED;
2444 case GL_R8I:
2445 case GL_R8UI:
2446 case GL_R16I:
2447 case GL_R16UI:
2448 case GL_R32I:
2449 case GL_R32UI:
2450 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2451 break;
2452 /* FALLTHROUGH */
2453 case GL_R8:
2454 case GL_R16:
2455 case GL_RED:
2456 case GL_COMPRESSED_RED:
2457 return GL_RED;
2458
2459 case GL_RG16F:
2460 case GL_RG32F:
2461 if (!ctx->Extensions.ARB_texture_float)
2462 break;
2463 return GL_RG;
2464 case GL_RG8I:
2465 case GL_RG8UI:
2466 case GL_RG16I:
2467 case GL_RG16UI:
2468 case GL_RG32I:
2469 case GL_RG32UI:
2470 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2471 break;
2472 /* FALLTHROUGH */
2473 case GL_RG:
2474 case GL_RG8:
2475 case GL_RG16:
2476 case GL_COMPRESSED_RG:
2477 return GL_RG;
2478 default:
2479 ; /* fallthrough */
2480 }
2481 }
2482
2483 if (ctx->Extensions.EXT_texture_shared_exponent) {
2484 switch (internalFormat) {
2485 case GL_RGB9_E5_EXT:
2486 return GL_RGB;
2487 default:
2488 ; /* fallthrough */
2489 }
2490 }
2491
2492 if (ctx->Extensions.EXT_packed_float) {
2493 switch (internalFormat) {
2494 case GL_R11F_G11F_B10F_EXT:
2495 return GL_RGB;
2496 default:
2497 ; /* fallthrough */
2498 }
2499 }
2500
2501 if (ctx->Extensions.ARB_depth_buffer_float) {
2502 switch (internalFormat) {
2503 case GL_DEPTH_COMPONENT32F:
2504 return GL_DEPTH_COMPONENT;
2505 case GL_DEPTH32F_STENCIL8:
2506 return GL_DEPTH_STENCIL;
2507 default:
2508 ; /* fallthrough */
2509 }
2510 }
2511
2512 return -1; /* error */
2513 }
2514
2515 /**
2516 * Returns the effective internal format from a texture format and type.
2517 * This is used by texture image operations internally for validation, when
2518 * the specified internal format is a base (unsized) format.
2519 *
2520 * This method will only return a valid effective internal format if the
2521 * combination of format, type and internal format in base form, is acceptable.
2522 *
2523 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2524 * in extensions, to unambiguously correspond to the given base format, then
2525 * that internal format is returned as the effective. Otherwise, if the
2526 * combination is accepted but a single effective format is not defined, the
2527 * passed base format will be returned instead.
2528 *
2529 * \param format the texture format
2530 * \param type the texture type
2531 */
2532 static GLenum
2533 _mesa_es3_effective_internal_format_for_format_and_type(GLenum format,
2534 GLenum type)
2535 {
2536 switch (type) {
2537 case GL_UNSIGNED_BYTE:
2538 switch (format) {
2539 case GL_RGBA:
2540 return GL_RGBA8;
2541 case GL_RGB:
2542 return GL_RGB8;
2543 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2544 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2545 * internal formats, they do not correspond to GL constants, so the base
2546 * format is returned instead.
2547 */
2548 case GL_BGRA_EXT:
2549 case GL_LUMINANCE_ALPHA:
2550 case GL_LUMINANCE:
2551 case GL_ALPHA:
2552 return format;
2553 }
2554 break;
2555
2556 case GL_UNSIGNED_SHORT_4_4_4_4:
2557 if (format == GL_RGBA)
2558 return GL_RGBA4;
2559 break;
2560
2561 case GL_UNSIGNED_SHORT_5_5_5_1:
2562 if (format == GL_RGBA)
2563 return GL_RGB5_A1;
2564 break;
2565
2566 case GL_UNSIGNED_SHORT_5_6_5:
2567 if (format == GL_RGB)
2568 return GL_RGB565;
2569 break;
2570
2571 /* OES_packed_depth_stencil */
2572 case GL_UNSIGNED_INT_24_8:
2573 if (format == GL_DEPTH_STENCIL)
2574 return GL_DEPTH24_STENCIL8;
2575 break;
2576
2577 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2578 if (format == GL_DEPTH_STENCIL)
2579 return GL_DEPTH32F_STENCIL8;
2580 break;
2581
2582 case GL_UNSIGNED_SHORT:
2583 if (format == GL_DEPTH_COMPONENT)
2584 return GL_DEPTH_COMPONENT16;
2585 break;
2586
2587 case GL_UNSIGNED_INT:
2588 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2589 * the format.
2590 */
2591 if (format == GL_DEPTH_COMPONENT)
2592 return format;
2593 break;
2594
2595 /* OES_texture_float and OES_texture_half_float */
2596 case GL_FLOAT:
2597 if (format == GL_DEPTH_COMPONENT)
2598 return GL_DEPTH_COMPONENT32F;
2599 /* fall through */
2600 case GL_HALF_FLOAT_OES:
2601 switch (format) {
2602 case GL_RGBA:
2603 case GL_RGB:
2604 case GL_LUMINANCE_ALPHA:
2605 case GL_LUMINANCE:
2606 case GL_ALPHA:
2607 case GL_RED:
2608 case GL_RG:
2609 return format;
2610 }
2611 break;
2612 case GL_HALF_FLOAT:
2613 switch (format) {
2614 case GL_RG:
2615 case GL_RED:
2616 return format;
2617 }
2618 break;
2619
2620 /* GL_EXT_texture_type_2_10_10_10_REV */
2621 case GL_UNSIGNED_INT_2_10_10_10_REV:
2622 switch (format) {
2623 case GL_RGBA:
2624 case GL_RGB:
2625 return format;
2626 }
2627 break;
2628
2629 default:
2630 /* fall through and return NONE */
2631 break;
2632 }
2633
2634 return GL_NONE;
2635 }
2636
2637 /**
2638 * Do error checking of format/type combinations for OpenGL ES 3
2639 * glTex[Sub]Image.
2640 * \return error code, or GL_NO_ERROR.
2641 */
2642 GLenum
2643 _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
2644 GLenum format, GLenum type,
2645 GLenum internalFormat)
2646 {
2647 /* If internalFormat is an unsized format, then the effective internal
2648 * format derived from format and type should be used instead. Page 127,
2649 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2650 *
2651 * "if internalformat is a base internal format, the effective
2652 * internal format is a sized internal format that is derived
2653 * from the format and type for internal use by the GL.
2654 * Table 3.12 specifies the mapping of format and type to effective
2655 * internal formats. The effective internal format is used by the GL
2656 * for purposes such as texture completeness or type checks for
2657 * CopyTex* commands. In these cases, the GL is required to operate
2658 * as if the effective internal format was used as the internalformat
2659 * when specifying the texture data."
2660 */
2661 if (_mesa_is_enum_format_unsized(internalFormat)) {
2662 GLenum effectiveInternalFormat =
2663 _mesa_es3_effective_internal_format_for_format_and_type(format, type);
2664
2665 if (effectiveInternalFormat == GL_NONE)
2666 return GL_INVALID_OPERATION;
2667
2668 GLenum baseInternalFormat;
2669 if (internalFormat == GL_BGRA_EXT) {
2670 /* Unfortunately, _mesa_base_tex_format returns a base format of
2671 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2672 * asking the question, "what channels does this format have?"
2673 * However, if we're trying to determine if two internal formats
2674 * match in the ES3 sense, we actually want GL_BGRA.
2675 */
2676 baseInternalFormat = GL_BGRA_EXT;
2677 } else {
2678 baseInternalFormat =
2679 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2680 }
2681
2682 if (internalFormat != baseInternalFormat)
2683 return GL_INVALID_OPERATION;
2684
2685 internalFormat = effectiveInternalFormat;
2686 }
2687
2688 switch (format) {
2689 case GL_BGRA_EXT:
2690 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2691 return GL_INVALID_OPERATION;
2692 break;
2693
2694 case GL_RGBA:
2695 switch (type) {
2696 case GL_UNSIGNED_BYTE:
2697 switch (internalFormat) {
2698 case GL_RGBA:
2699 case GL_RGBA8:
2700 case GL_RGB5_A1:
2701 case GL_RGBA4:
2702 case GL_SRGB8_ALPHA8_EXT:
2703 break;
2704 default:
2705 return GL_INVALID_OPERATION;
2706 }
2707 break;
2708
2709 case GL_BYTE:
2710 if (internalFormat != GL_RGBA8_SNORM)
2711 return GL_INVALID_OPERATION;
2712 break;
2713
2714 case GL_UNSIGNED_SHORT_4_4_4_4:
2715 switch (internalFormat) {
2716 case GL_RGBA:
2717 case GL_RGBA4:
2718 break;
2719 default:
2720 return GL_INVALID_OPERATION;
2721 }
2722 break;
2723
2724 case GL_UNSIGNED_SHORT_5_5_5_1:
2725 switch (internalFormat) {
2726 case GL_RGBA:
2727 case GL_RGB5_A1:
2728 break;
2729 default:
2730 return GL_INVALID_OPERATION;
2731 }
2732 break;
2733
2734 case GL_UNSIGNED_INT_2_10_10_10_REV:
2735 switch (internalFormat) {
2736 case GL_RGBA: /* GL_EXT_texture_type_2_10_10_10_REV */
2737 case GL_RGB10_A2:
2738 case GL_RGB5_A1:
2739 break;
2740 default:
2741 return GL_INVALID_OPERATION;
2742 }
2743 break;
2744
2745 case GL_HALF_FLOAT:
2746 if (internalFormat != GL_RGBA16F)
2747 return GL_INVALID_OPERATION;
2748 break;
2749
2750 case GL_FLOAT:
2751 switch (internalFormat) {
2752 case GL_RGBA16F:
2753 case GL_RGBA32F:
2754 break;
2755 case GL_RGBA:
2756 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2757 break;
2758 default:
2759 return GL_INVALID_OPERATION;
2760 }
2761 break;
2762
2763 case GL_HALF_FLOAT_OES:
2764 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2765 break;
2766 default:
2767 return GL_INVALID_OPERATION;
2768 }
2769 break;
2770
2771 case GL_RGBA_INTEGER:
2772 switch (type) {
2773 case GL_UNSIGNED_BYTE:
2774 if (internalFormat != GL_RGBA8UI)
2775 return GL_INVALID_OPERATION;
2776 break;
2777
2778 case GL_BYTE:
2779 if (internalFormat != GL_RGBA8I)
2780 return GL_INVALID_OPERATION;
2781 break;
2782
2783 case GL_UNSIGNED_SHORT:
2784 if (internalFormat != GL_RGBA16UI)
2785 return GL_INVALID_OPERATION;
2786 break;
2787
2788 case GL_SHORT:
2789 if (internalFormat != GL_RGBA16I)
2790 return GL_INVALID_OPERATION;
2791 break;
2792
2793 case GL_UNSIGNED_INT:
2794 if (internalFormat != GL_RGBA32UI)
2795 return GL_INVALID_OPERATION;
2796 break;
2797
2798 case GL_INT:
2799 if (internalFormat != GL_RGBA32I)
2800 return GL_INVALID_OPERATION;
2801 break;
2802
2803 case GL_UNSIGNED_INT_2_10_10_10_REV:
2804 if (internalFormat != GL_RGB10_A2UI)
2805 return GL_INVALID_OPERATION;
2806 break;
2807
2808 default:
2809 return GL_INVALID_OPERATION;
2810 }
2811 break;
2812
2813 case GL_RGB:
2814 switch (type) {
2815 case GL_UNSIGNED_BYTE:
2816 switch (internalFormat) {
2817 case GL_RGB:
2818 case GL_RGB8:
2819 case GL_RGB565:
2820 case GL_SRGB8:
2821 break;
2822 default:
2823 return GL_INVALID_OPERATION;
2824 }
2825 break;
2826
2827 case GL_BYTE:
2828 if (internalFormat != GL_RGB8_SNORM)
2829 return GL_INVALID_OPERATION;
2830 break;
2831
2832 case GL_UNSIGNED_SHORT_5_6_5:
2833 switch (internalFormat) {
2834 case GL_RGB:
2835 case GL_RGB565:
2836 break;
2837 default:
2838 return GL_INVALID_OPERATION;
2839 }
2840 break;
2841
2842 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2843 if (internalFormat != GL_R11F_G11F_B10F)
2844 return GL_INVALID_OPERATION;
2845 break;
2846
2847 case GL_UNSIGNED_INT_5_9_9_9_REV:
2848 if (internalFormat != GL_RGB9_E5)
2849 return GL_INVALID_OPERATION;
2850 break;
2851
2852 case GL_HALF_FLOAT:
2853 switch (internalFormat) {
2854 case GL_RGB16F:
2855 case GL_R11F_G11F_B10F:
2856 case GL_RGB9_E5:
2857 break;
2858 default:
2859 return GL_INVALID_OPERATION;
2860 }
2861 break;
2862
2863 case GL_FLOAT:
2864 switch (internalFormat) {
2865 case GL_RGB16F:
2866 case GL_RGB32F:
2867 case GL_R11F_G11F_B10F:
2868 case GL_RGB9_E5:
2869 break;
2870 case GL_RGB:
2871 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2872 break;
2873 default:
2874 return GL_INVALID_OPERATION;
2875 }
2876 break;
2877
2878 case GL_HALF_FLOAT_OES:
2879 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
2880 return GL_INVALID_OPERATION;
2881 break;
2882
2883 case GL_UNSIGNED_INT_2_10_10_10_REV:
2884 switch (internalFormat) {
2885 case GL_RGB: /* GL_EXT_texture_type_2_10_10_10_REV */
2886 break;
2887 default:
2888 return GL_INVALID_OPERATION;
2889 }
2890 break;
2891
2892 default:
2893 return GL_INVALID_OPERATION;
2894 }
2895 break;
2896
2897 case GL_RGB_INTEGER:
2898 switch (type) {
2899 case GL_UNSIGNED_BYTE:
2900 if (internalFormat != GL_RGB8UI)
2901 return GL_INVALID_OPERATION;
2902 break;
2903
2904 case GL_BYTE:
2905 if (internalFormat != GL_RGB8I)
2906 return GL_INVALID_OPERATION;
2907 break;
2908
2909 case GL_UNSIGNED_SHORT:
2910 if (internalFormat != GL_RGB16UI)
2911 return GL_INVALID_OPERATION;
2912 break;
2913
2914 case GL_SHORT:
2915 if (internalFormat != GL_RGB16I)
2916 return GL_INVALID_OPERATION;
2917 break;
2918
2919 case GL_UNSIGNED_INT:
2920 if (internalFormat != GL_RGB32UI)
2921 return GL_INVALID_OPERATION;
2922 break;
2923
2924 case GL_INT:
2925 if (internalFormat != GL_RGB32I)
2926 return GL_INVALID_OPERATION;
2927 break;
2928
2929 default:
2930 return GL_INVALID_OPERATION;
2931 }
2932 break;
2933
2934 case GL_RG:
2935 switch (type) {
2936 case GL_UNSIGNED_BYTE:
2937 if (internalFormat != GL_RG8)
2938 return GL_INVALID_OPERATION;
2939 break;
2940
2941 case GL_BYTE:
2942 if (internalFormat != GL_RG8_SNORM)
2943 return GL_INVALID_OPERATION;
2944 break;
2945
2946 case GL_HALF_FLOAT:
2947 case GL_HALF_FLOAT_OES:
2948 switch (internalFormat) {
2949 case GL_RG16F:
2950 break;
2951 case GL_RG:
2952 if (ctx->Extensions.ARB_texture_rg &&
2953 ctx->Extensions.OES_texture_half_float)
2954 break;
2955 /* fallthrough */
2956 default:
2957 return GL_INVALID_OPERATION;
2958 }
2959 break;
2960
2961 case GL_FLOAT:
2962 switch (internalFormat) {
2963 case GL_RG16F:
2964 case GL_RG32F:
2965 break;
2966 case GL_RG:
2967 if (ctx->Extensions.ARB_texture_rg &&
2968 ctx->Extensions.OES_texture_float)
2969 break;
2970 /* fallthrough */
2971 default:
2972 return GL_INVALID_OPERATION;
2973 }
2974 break;
2975
2976 default:
2977 return GL_INVALID_OPERATION;
2978 }
2979 break;
2980
2981 case GL_RG_INTEGER:
2982 switch (type) {
2983 case GL_UNSIGNED_BYTE:
2984 if (internalFormat != GL_RG8UI)
2985 return GL_INVALID_OPERATION;
2986 break;
2987
2988 case GL_BYTE:
2989 if (internalFormat != GL_RG8I)
2990 return GL_INVALID_OPERATION;
2991 break;
2992
2993 case GL_UNSIGNED_SHORT:
2994 if (internalFormat != GL_RG16UI)
2995 return GL_INVALID_OPERATION;
2996 break;
2997
2998 case GL_SHORT:
2999 if (internalFormat != GL_RG16I)
3000 return GL_INVALID_OPERATION;
3001 break;
3002
3003 case GL_UNSIGNED_INT:
3004 if (internalFormat != GL_RG32UI)
3005 return GL_INVALID_OPERATION;
3006 break;
3007
3008 case GL_INT:
3009 if (internalFormat != GL_RG32I)
3010 return GL_INVALID_OPERATION;
3011 break;
3012
3013 default:
3014 return GL_INVALID_OPERATION;
3015 }
3016 break;
3017
3018 case GL_RED:
3019 switch (type) {
3020 case GL_UNSIGNED_BYTE:
3021 if (internalFormat != GL_R8)
3022 return GL_INVALID_OPERATION;
3023 break;
3024
3025 case GL_BYTE:
3026 if (internalFormat != GL_R8_SNORM)
3027 return GL_INVALID_OPERATION;
3028 break;
3029
3030 case GL_HALF_FLOAT:
3031 case GL_HALF_FLOAT_OES:
3032 switch (internalFormat) {
3033 case GL_R16F:
3034 break;
3035 case GL_RG:
3036 case GL_RED:
3037 if (ctx->Extensions.ARB_texture_rg &&
3038 ctx->Extensions.OES_texture_half_float)
3039 break;
3040 /* fallthrough */
3041 default:
3042 return GL_INVALID_OPERATION;
3043 }
3044 break;
3045
3046 case GL_FLOAT:
3047 switch (internalFormat) {
3048 case GL_R16F:
3049 case GL_R32F:
3050 break;
3051 case GL_RED:
3052 if (ctx->Extensions.ARB_texture_rg &&
3053 ctx->Extensions.OES_texture_float)
3054 break;
3055 /* fallthrough */
3056 default:
3057 return GL_INVALID_OPERATION;
3058 }
3059 break;
3060
3061 default:
3062 return GL_INVALID_OPERATION;
3063 }
3064 break;
3065
3066 case GL_RED_INTEGER:
3067 switch (type) {
3068 case GL_UNSIGNED_BYTE:
3069 if (internalFormat != GL_R8UI)
3070 return GL_INVALID_OPERATION;
3071 break;
3072
3073 case GL_BYTE:
3074 if (internalFormat != GL_R8I)
3075 return GL_INVALID_OPERATION;
3076 break;
3077
3078 case GL_UNSIGNED_SHORT:
3079 if (internalFormat != GL_R16UI)
3080 return GL_INVALID_OPERATION;
3081 break;
3082
3083 case GL_SHORT:
3084 if (internalFormat != GL_R16I)
3085 return GL_INVALID_OPERATION;
3086 break;
3087
3088 case GL_UNSIGNED_INT:
3089 if (internalFormat != GL_R32UI)
3090 return GL_INVALID_OPERATION;
3091 break;
3092
3093 case GL_INT:
3094 if (internalFormat != GL_R32I)
3095 return GL_INVALID_OPERATION;
3096 break;
3097
3098 default:
3099 return GL_INVALID_OPERATION;
3100 }
3101 break;
3102
3103 case GL_DEPTH_COMPONENT:
3104 switch (type) {
3105 case GL_UNSIGNED_SHORT:
3106 if (internalFormat != GL_DEPTH_COMPONENT
3107 && internalFormat != GL_DEPTH_COMPONENT16)
3108 return GL_INVALID_OPERATION;
3109 break;
3110
3111 case GL_UNSIGNED_INT:
3112 switch (internalFormat) {
3113 case GL_DEPTH_COMPONENT:
3114 case GL_DEPTH_COMPONENT16:
3115 case GL_DEPTH_COMPONENT24:
3116 break;
3117 default:
3118 return GL_INVALID_OPERATION;
3119 }
3120 break;
3121
3122 case GL_FLOAT:
3123 if (internalFormat != GL_DEPTH_COMPONENT32F)
3124 return GL_INVALID_OPERATION;
3125 break;
3126
3127 default:
3128 return GL_INVALID_OPERATION;
3129 }
3130 break;
3131
3132 case GL_DEPTH_STENCIL:
3133 switch (type) {
3134 case GL_UNSIGNED_INT_24_8:
3135 if (internalFormat != GL_DEPTH_STENCIL
3136 && internalFormat != GL_DEPTH24_STENCIL8)
3137 return GL_INVALID_OPERATION;
3138 break;
3139
3140 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3141 if (internalFormat != GL_DEPTH32F_STENCIL8)
3142 return GL_INVALID_OPERATION;
3143 break;
3144
3145 default:
3146 return GL_INVALID_OPERATION;
3147 }
3148 break;
3149
3150 case GL_ALPHA:
3151 case GL_LUMINANCE:
3152 case GL_LUMINANCE_ALPHA:
3153 switch (type) {
3154 case GL_FLOAT:
3155 if (ctx->Extensions.OES_texture_float && internalFormat == format)
3156 break;
3157 case GL_HALF_FLOAT_OES:
3158 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
3159 break;
3160 default:
3161 if (type != GL_UNSIGNED_BYTE || format != internalFormat)
3162 return GL_INVALID_OPERATION;
3163 }
3164 }
3165
3166 return GL_NO_ERROR;
3167 }
3168
3169 static void
3170 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3171 {
3172 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3173 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3174 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3175 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3176 }
3177
3178 static bool
3179 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3180 {
3181 switch (format) {
3182 case GL_RGBA:
3183 case GL_RGBA_INTEGER_EXT:
3184 set_swizzle(swizzle, 0, 1, 2, 3);
3185 return true;
3186 case GL_BGRA:
3187 case GL_BGRA_INTEGER_EXT:
3188 set_swizzle(swizzle, 2, 1, 0, 3);
3189 return true;
3190 case GL_ABGR_EXT:
3191 set_swizzle(swizzle, 3, 2, 1, 0);
3192 return true;
3193 case GL_RGB:
3194 case GL_RGB_INTEGER_EXT:
3195 set_swizzle(swizzle, 0, 1, 2, 5);
3196 return true;
3197 case GL_BGR:
3198 case GL_BGR_INTEGER_EXT:
3199 set_swizzle(swizzle, 2, 1, 0, 5);
3200 return true;
3201 case GL_LUMINANCE_ALPHA:
3202 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3203 set_swizzle(swizzle, 0, 0, 0, 1);
3204 return true;
3205 case GL_RG:
3206 case GL_RG_INTEGER:
3207 set_swizzle(swizzle, 0, 1, 4, 5);
3208 return true;
3209 case GL_RED:
3210 case GL_RED_INTEGER_EXT:
3211 set_swizzle(swizzle, 0, 4, 4, 5);
3212 return true;
3213 case GL_GREEN:
3214 case GL_GREEN_INTEGER_EXT:
3215 set_swizzle(swizzle, 4, 0, 4, 5);
3216 return true;
3217 case GL_BLUE:
3218 case GL_BLUE_INTEGER_EXT:
3219 set_swizzle(swizzle, 4, 4, 0, 5);
3220 return true;
3221 case GL_ALPHA:
3222 case GL_ALPHA_INTEGER_EXT:
3223 set_swizzle(swizzle, 4, 4, 4, 0);
3224 return true;
3225 case GL_LUMINANCE:
3226 case GL_LUMINANCE_INTEGER_EXT:
3227 set_swizzle(swizzle, 0, 0, 0, 5);
3228 return true;
3229 case GL_INTENSITY:
3230 set_swizzle(swizzle, 0, 0, 0, 0);
3231 return true;
3232 default:
3233 return false;
3234 }
3235 }
3236
3237 /**
3238 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3239 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3240 * otherwise (for non-array formats).
3241 *
3242 * This function will typically be used to compute a mesa format from a GL type
3243 * so we can then call _mesa_format_convert. This function does
3244 * not consider byte swapping, so it returns types assuming that no byte
3245 * swapping is involved. If byte swapping is involved then clients are supposed
3246 * to handle that on their side before calling _mesa_format_convert.
3247 *
3248 * This function returns an uint32_t that can pack a mesa_format or a
3249 * mesa_array_format. Clients must check the mesa array format bit
3250 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3251 * format is a mesa_array_format or a mesa_format.
3252 */
3253 uint32_t
3254 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3255 {
3256 bool is_array_format = true;
3257 uint8_t swizzle[4];
3258 bool normalized = false, is_float = false, is_signed = false;
3259 int num_channels = 0, type_size = 0;
3260
3261 /* Extract array format type information from the OpenGL data type */
3262 switch (type) {
3263 case GL_UNSIGNED_BYTE:
3264 type_size = 1;
3265 break;
3266 case GL_BYTE:
3267 type_size = 1;
3268 is_signed = true;
3269 break;
3270 case GL_UNSIGNED_SHORT:
3271 type_size = 2;
3272 break;
3273 case GL_SHORT:
3274 type_size = 2;
3275 is_signed = true;
3276 break;
3277 case GL_UNSIGNED_INT:
3278 type_size = 4;
3279 break;
3280 case GL_INT:
3281 type_size = 4;
3282 is_signed = true;
3283 break;
3284 case GL_HALF_FLOAT:
3285 case GL_HALF_FLOAT_OES:
3286 type_size = 2;
3287 is_signed = true;
3288 is_float = true;
3289 break;
3290 case GL_FLOAT:
3291 type_size = 4;
3292 is_signed = true;
3293 is_float = true;
3294 break;
3295 default:
3296 is_array_format = false;
3297 break;
3298 }
3299
3300 /* Extract array format swizzle information from the OpenGL format */
3301 if (is_array_format)
3302 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3303
3304 /* If this is an array format type after checking data type and format,
3305 * create the array format
3306 */
3307 if (is_array_format) {
3308 normalized = !_mesa_is_enum_format_integer(format);
3309 num_channels = _mesa_components_in_format(format);
3310
3311 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
3312 normalized, num_channels,
3313 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3314 }
3315
3316 /* Otherwise this is not an array format, so return the mesa_format
3317 * matching the OpenGL format and data type
3318 */
3319 switch (type) {
3320 case GL_UNSIGNED_SHORT_5_6_5:
3321 if (format == GL_RGB)
3322 return MESA_FORMAT_B5G6R5_UNORM;
3323 else if (format == GL_BGR)
3324 return MESA_FORMAT_R5G6B5_UNORM;
3325 else if (format == GL_RGB_INTEGER)
3326 return MESA_FORMAT_B5G6R5_UINT;
3327 break;
3328 case GL_UNSIGNED_SHORT_5_6_5_REV:
3329 if (format == GL_RGB)
3330 return MESA_FORMAT_R5G6B5_UNORM;
3331 else if (format == GL_BGR)
3332 return MESA_FORMAT_B5G6R5_UNORM;
3333 else if (format == GL_RGB_INTEGER)
3334 return MESA_FORMAT_R5G6B5_UINT;
3335 break;
3336 case GL_UNSIGNED_SHORT_4_4_4_4:
3337 if (format == GL_RGBA)
3338 return MESA_FORMAT_A4B4G4R4_UNORM;
3339 else if (format == GL_BGRA)
3340 return MESA_FORMAT_A4R4G4B4_UNORM;
3341 else if (format == GL_ABGR_EXT)
3342 return MESA_FORMAT_R4G4B4A4_UNORM;
3343 else if (format == GL_RGBA_INTEGER)
3344 return MESA_FORMAT_A4B4G4R4_UINT;
3345 else if (format == GL_BGRA_INTEGER)
3346 return MESA_FORMAT_A4R4G4B4_UINT;
3347 break;
3348 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3349 if (format == GL_RGBA)
3350 return MESA_FORMAT_R4G4B4A4_UNORM;
3351 else if (format == GL_BGRA)
3352 return MESA_FORMAT_B4G4R4A4_UNORM;
3353 else if (format == GL_ABGR_EXT)
3354 return MESA_FORMAT_A4B4G4R4_UNORM;
3355 else if (format == GL_RGBA_INTEGER)
3356 return MESA_FORMAT_R4G4B4A4_UINT;
3357 else if (format == GL_BGRA_INTEGER)
3358 return MESA_FORMAT_B4G4R4A4_UINT;
3359 break;
3360 case GL_UNSIGNED_SHORT_5_5_5_1:
3361 if (format == GL_RGBA)
3362 return MESA_FORMAT_A1B5G5R5_UNORM;
3363 else if (format == GL_BGRA)
3364 return MESA_FORMAT_A1R5G5B5_UNORM;
3365 else if (format == GL_RGBA_INTEGER)
3366 return MESA_FORMAT_A1B5G5R5_UINT;
3367 else if (format == GL_BGRA_INTEGER)
3368 return MESA_FORMAT_A1R5G5B5_UINT;
3369 break;
3370 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3371 if (format == GL_RGBA)
3372 return MESA_FORMAT_R5G5B5A1_UNORM;
3373 else if (format == GL_BGRA)
3374 return MESA_FORMAT_B5G5R5A1_UNORM;
3375 else if (format == GL_RGBA_INTEGER)
3376 return MESA_FORMAT_R5G5B5A1_UINT;
3377 else if (format == GL_BGRA_INTEGER)
3378 return MESA_FORMAT_B5G5R5A1_UINT;
3379 break;
3380 case GL_UNSIGNED_BYTE_3_3_2:
3381 if (format == GL_RGB)
3382 return MESA_FORMAT_B2G3R3_UNORM;
3383 else if (format == GL_RGB_INTEGER)
3384 return MESA_FORMAT_B2G3R3_UINT;
3385 break;
3386 case GL_UNSIGNED_BYTE_2_3_3_REV:
3387 if (format == GL_RGB)
3388 return MESA_FORMAT_R3G3B2_UNORM;
3389 else if (format == GL_RGB_INTEGER)
3390 return MESA_FORMAT_R3G3B2_UINT;
3391 break;
3392 case GL_UNSIGNED_INT_5_9_9_9_REV:
3393 if (format == GL_RGB)
3394 return MESA_FORMAT_R9G9B9E5_FLOAT;
3395 break;
3396 case GL_UNSIGNED_INT_10_10_10_2:
3397 if (format == GL_RGBA)
3398 return MESA_FORMAT_A2B10G10R10_UNORM;
3399 else if (format == GL_RGBA_INTEGER)
3400 return MESA_FORMAT_A2B10G10R10_UINT;
3401 else if (format == GL_BGRA)
3402 return MESA_FORMAT_A2R10G10B10_UNORM;
3403 else if (format == GL_BGRA_INTEGER)
3404 return MESA_FORMAT_A2R10G10B10_UINT;
3405 break;
3406 case GL_UNSIGNED_INT_2_10_10_10_REV:
3407 if (format == GL_RGB)
3408 return MESA_FORMAT_R10G10B10X2_UNORM;
3409 if (format == GL_RGBA)
3410 return MESA_FORMAT_R10G10B10A2_UNORM;
3411 else if (format == GL_RGBA_INTEGER)
3412 return MESA_FORMAT_R10G10B10A2_UINT;
3413 else if (format == GL_BGRA)
3414 return MESA_FORMAT_B10G10R10A2_UNORM;
3415 else if (format == GL_BGRA_INTEGER)
3416 return MESA_FORMAT_B10G10R10A2_UINT;
3417 break;
3418 case GL_UNSIGNED_INT_8_8_8_8:
3419 if (format == GL_RGBA)
3420 return MESA_FORMAT_A8B8G8R8_UNORM;
3421 else if (format == GL_BGRA)
3422 return MESA_FORMAT_A8R8G8B8_UNORM;
3423 else if (format == GL_ABGR_EXT)
3424 return MESA_FORMAT_R8G8B8A8_UNORM;
3425 else if (format == GL_RGBA_INTEGER)
3426 return MESA_FORMAT_A8B8G8R8_UINT;
3427 else if (format == GL_BGRA_INTEGER)
3428 return MESA_FORMAT_A8R8G8B8_UINT;
3429 break;
3430 case GL_UNSIGNED_INT_8_8_8_8_REV:
3431 if (format == GL_RGBA)
3432 return MESA_FORMAT_R8G8B8A8_UNORM;
3433 else if (format == GL_BGRA)
3434 return MESA_FORMAT_B8G8R8A8_UNORM;
3435 else if (format == GL_ABGR_EXT)
3436 return MESA_FORMAT_A8B8G8R8_UNORM;
3437 else if (format == GL_RGBA_INTEGER)
3438 return MESA_FORMAT_R8G8B8A8_UINT;
3439 else if (format == GL_BGRA_INTEGER)
3440 return MESA_FORMAT_B8G8R8A8_UINT;
3441 break;
3442 case GL_UNSIGNED_SHORT_8_8_MESA:
3443 if (format == GL_YCBCR_MESA)
3444 return MESA_FORMAT_YCBCR;
3445 break;
3446 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3447 if (format == GL_YCBCR_MESA)
3448 return MESA_FORMAT_YCBCR_REV;
3449 break;
3450 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3451 if (format == GL_RGB)
3452 return MESA_FORMAT_R11G11B10_FLOAT;
3453 default:
3454 break;
3455 }
3456
3457 /* If we got here it means that we could not find a Mesa format that
3458 * matches the GL format/type provided. We may need to add a new Mesa
3459 * format in that case.
3460 */
3461 unreachable("Unsupported format");
3462 }