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[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 * Test if the given format represents an sRGB format.
1343 * \param format the GL format (can be an internal format)
1344 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1345 */
1346 GLboolean
1347 _mesa_is_srgb_format(GLenum format)
1348 {
1349 switch (format) {
1350 case GL_SRGB:
1351 case GL_SRGB8:
1352 case GL_SRGB_ALPHA:
1353 case GL_SRGB8_ALPHA8:
1354 case GL_COMPRESSED_SRGB:
1355 case GL_COMPRESSED_SRGB_ALPHA:
1356 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1357 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1358 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1359 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1360 case GL_COMPRESSED_SRGB8_ETC2:
1361 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1362 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1363 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1364 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1365 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1366 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1367 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1368 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1369 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1370 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1371 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1372 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1373 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1374 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1375 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1376 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1377 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1378 return GL_TRUE;
1379 default:
1380 break;
1381 }
1382
1383 return GL_FALSE;
1384 }
1385
1386 /**
1387 * Convert various unpack formats to the corresponding base format.
1388 */
1389 GLenum
1390 _mesa_unpack_format_to_base_format(GLenum format)
1391 {
1392 switch(format) {
1393 case GL_RED_INTEGER:
1394 return GL_RED;
1395 case GL_GREEN_INTEGER:
1396 return GL_GREEN;
1397 case GL_BLUE_INTEGER:
1398 return GL_BLUE;
1399 case GL_ALPHA_INTEGER:
1400 return GL_ALPHA;
1401 case GL_RG_INTEGER:
1402 return GL_RG;
1403 case GL_RGB_INTEGER:
1404 return GL_RGB;
1405 case GL_RGBA_INTEGER:
1406 return GL_RGBA;
1407 case GL_BGR_INTEGER:
1408 return GL_BGR;
1409 case GL_BGRA_INTEGER:
1410 return GL_BGRA;
1411 case GL_LUMINANCE_INTEGER_EXT:
1412 return GL_LUMINANCE;
1413 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1414 return GL_LUMINANCE_ALPHA;
1415 case GL_RED:
1416 case GL_GREEN:
1417 case GL_BLUE:
1418 case GL_RG:
1419 case GL_RGB:
1420 case GL_RGBA:
1421 case GL_BGR:
1422 case GL_BGRA:
1423 case GL_ALPHA:
1424 case GL_LUMINANCE:
1425 case GL_LUMINANCE_ALPHA:
1426 default:
1427 return format;
1428 }
1429 }
1430
1431 /**
1432 * Convert various base formats to the corresponding integer format.
1433 */
1434 GLenum
1435 _mesa_base_format_to_integer_format(GLenum format)
1436 {
1437 switch(format) {
1438 case GL_RED:
1439 return GL_RED_INTEGER;
1440 case GL_GREEN:
1441 return GL_GREEN_INTEGER;
1442 case GL_BLUE:
1443 return GL_BLUE_INTEGER;
1444 case GL_RG:
1445 return GL_RG_INTEGER;
1446 case GL_RGB:
1447 return GL_RGB_INTEGER;
1448 case GL_RGBA:
1449 return GL_RGBA_INTEGER;
1450 case GL_BGR:
1451 return GL_BGR_INTEGER;
1452 case GL_BGRA:
1453 return GL_BGRA_INTEGER;
1454 case GL_ALPHA:
1455 return GL_ALPHA_INTEGER;
1456 case GL_LUMINANCE:
1457 return GL_LUMINANCE_INTEGER_EXT;
1458 case GL_LUMINANCE_ALPHA:
1459 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1460 }
1461
1462 return format;
1463 }
1464
1465
1466 /**
1467 * Does the given base texture/renderbuffer format have the channel
1468 * named by 'pname'?
1469 */
1470 GLboolean
1471 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1472 {
1473 switch (pname) {
1474 case GL_TEXTURE_RED_SIZE:
1475 case GL_TEXTURE_RED_TYPE:
1476 case GL_RENDERBUFFER_RED_SIZE_EXT:
1477 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1478 case GL_INTERNALFORMAT_RED_SIZE:
1479 case GL_INTERNALFORMAT_RED_TYPE:
1480 if (base_format == GL_RED ||
1481 base_format == GL_RG ||
1482 base_format == GL_RGB ||
1483 base_format == GL_RGBA) {
1484 return GL_TRUE;
1485 }
1486 return GL_FALSE;
1487 case GL_TEXTURE_GREEN_SIZE:
1488 case GL_TEXTURE_GREEN_TYPE:
1489 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1490 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1491 case GL_INTERNALFORMAT_GREEN_SIZE:
1492 case GL_INTERNALFORMAT_GREEN_TYPE:
1493 if (base_format == GL_RG ||
1494 base_format == GL_RGB ||
1495 base_format == GL_RGBA) {
1496 return GL_TRUE;
1497 }
1498 return GL_FALSE;
1499 case GL_TEXTURE_BLUE_SIZE:
1500 case GL_TEXTURE_BLUE_TYPE:
1501 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1502 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1503 case GL_INTERNALFORMAT_BLUE_SIZE:
1504 case GL_INTERNALFORMAT_BLUE_TYPE:
1505 if (base_format == GL_RGB ||
1506 base_format == GL_RGBA) {
1507 return GL_TRUE;
1508 }
1509 return GL_FALSE;
1510 case GL_TEXTURE_ALPHA_SIZE:
1511 case GL_TEXTURE_ALPHA_TYPE:
1512 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1513 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1514 case GL_INTERNALFORMAT_ALPHA_SIZE:
1515 case GL_INTERNALFORMAT_ALPHA_TYPE:
1516 if (base_format == GL_RGBA ||
1517 base_format == GL_ALPHA ||
1518 base_format == GL_LUMINANCE_ALPHA) {
1519 return GL_TRUE;
1520 }
1521 return GL_FALSE;
1522 case GL_TEXTURE_LUMINANCE_SIZE:
1523 case GL_TEXTURE_LUMINANCE_TYPE:
1524 if (base_format == GL_LUMINANCE ||
1525 base_format == GL_LUMINANCE_ALPHA) {
1526 return GL_TRUE;
1527 }
1528 return GL_FALSE;
1529 case GL_TEXTURE_INTENSITY_SIZE:
1530 case GL_TEXTURE_INTENSITY_TYPE:
1531 if (base_format == GL_INTENSITY) {
1532 return GL_TRUE;
1533 }
1534 return GL_FALSE;
1535 case GL_TEXTURE_DEPTH_SIZE:
1536 case GL_TEXTURE_DEPTH_TYPE:
1537 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1538 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1539 case GL_INTERNALFORMAT_DEPTH_SIZE:
1540 case GL_INTERNALFORMAT_DEPTH_TYPE:
1541 if (base_format == GL_DEPTH_STENCIL ||
1542 base_format == GL_DEPTH_COMPONENT) {
1543 return GL_TRUE;
1544 }
1545 return GL_FALSE;
1546 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1547 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1548 case GL_INTERNALFORMAT_STENCIL_SIZE:
1549 case GL_INTERNALFORMAT_STENCIL_TYPE:
1550 if (base_format == GL_DEPTH_STENCIL ||
1551 base_format == GL_STENCIL_INDEX) {
1552 return GL_TRUE;
1553 }
1554 return GL_FALSE;
1555 default:
1556 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1557 __func__, pname);
1558 return GL_FALSE;
1559 }
1560
1561 return GL_FALSE;
1562 }
1563
1564
1565 /**
1566 * Returns the number of channels/components for a base format.
1567 */
1568 GLint
1569 _mesa_base_format_component_count(GLenum base_format)
1570 {
1571 switch (base_format) {
1572 case GL_LUMINANCE:
1573 case GL_RED:
1574 case GL_ALPHA:
1575 case GL_INTENSITY:
1576 case GL_DEPTH_COMPONENT:
1577 return 1;
1578 case GL_RG:
1579 case GL_LUMINANCE_ALPHA:
1580 case GL_DEPTH_STENCIL:
1581 return 2;
1582 case GL_RGB:
1583 return 3;
1584 case GL_RGBA:
1585 return 4;
1586 default:
1587 return -1;
1588 }
1589 }
1590
1591
1592 /**
1593 * If format is a generic compressed format, return the corresponding
1594 * non-compressed format. For other formats, return the format as-is.
1595 */
1596 GLenum
1597 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1598 {
1599 switch (format) {
1600 case GL_COMPRESSED_RED:
1601 return GL_RED;
1602 case GL_COMPRESSED_RG:
1603 return GL_RG;
1604 case GL_COMPRESSED_RGB:
1605 return GL_RGB;
1606 case GL_COMPRESSED_RGBA:
1607 return GL_RGBA;
1608 case GL_COMPRESSED_ALPHA:
1609 return GL_ALPHA;
1610 case GL_COMPRESSED_LUMINANCE:
1611 return GL_LUMINANCE;
1612 case GL_COMPRESSED_LUMINANCE_ALPHA:
1613 return GL_LUMINANCE_ALPHA;
1614 case GL_COMPRESSED_INTENSITY:
1615 return GL_INTENSITY;
1616 /* sRGB formats */
1617 case GL_COMPRESSED_SRGB:
1618 return GL_SRGB;
1619 case GL_COMPRESSED_SRGB_ALPHA:
1620 return GL_SRGB_ALPHA;
1621 case GL_COMPRESSED_SLUMINANCE:
1622 return GL_SLUMINANCE;
1623 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1624 return GL_SLUMINANCE_ALPHA;
1625 default:
1626 return format;
1627 }
1628 }
1629
1630
1631 /**
1632 * Return the equivalent non-generic internal format.
1633 * This is useful for comparing whether two internal formats are equivalent.
1634 */
1635 GLenum
1636 _mesa_get_nongeneric_internalformat(GLenum format)
1637 {
1638 switch (format) {
1639 /* GL 1.1 formats. */
1640 case 4:
1641 case GL_RGBA:
1642 return GL_RGBA8;
1643 case 3:
1644 case GL_RGB:
1645 return GL_RGB8;
1646 case 2:
1647 case GL_LUMINANCE_ALPHA:
1648 return GL_LUMINANCE8_ALPHA8;
1649 case 1:
1650 case GL_LUMINANCE:
1651 return GL_LUMINANCE8;
1652 case GL_ALPHA:
1653 return GL_ALPHA8;
1654 case GL_INTENSITY:
1655 return GL_INTENSITY8;
1656
1657 /* GL_ARB_texture_rg */
1658 case GL_RED:
1659 return GL_R8;
1660 case GL_RG:
1661 return GL_RG8;
1662
1663 /* GL_EXT_texture_sRGB */
1664 case GL_SRGB:
1665 return GL_SRGB8;
1666 case GL_SRGB_ALPHA:
1667 return GL_SRGB8_ALPHA8;
1668 case GL_SLUMINANCE:
1669 return GL_SLUMINANCE8;
1670 case GL_SLUMINANCE_ALPHA:
1671 return GL_SLUMINANCE8_ALPHA8;
1672
1673 /* GL_EXT_texture_snorm */
1674 case GL_RGBA_SNORM:
1675 return GL_RGBA8_SNORM;
1676 case GL_RGB_SNORM:
1677 return GL_RGB8_SNORM;
1678 case GL_RG_SNORM:
1679 return GL_RG8_SNORM;
1680 case GL_RED_SNORM:
1681 return GL_R8_SNORM;
1682 case GL_LUMINANCE_ALPHA_SNORM:
1683 return GL_LUMINANCE8_ALPHA8_SNORM;
1684 case GL_LUMINANCE_SNORM:
1685 return GL_LUMINANCE8_SNORM;
1686 case GL_ALPHA_SNORM:
1687 return GL_ALPHA8_SNORM;
1688 case GL_INTENSITY_SNORM:
1689 return GL_INTENSITY8_SNORM;
1690
1691 default:
1692 return format;
1693 }
1694 }
1695
1696
1697 /**
1698 * Convert an sRGB internal format to linear.
1699 */
1700 GLenum
1701 _mesa_get_linear_internalformat(GLenum format)
1702 {
1703 switch (format) {
1704 case GL_SRGB:
1705 return GL_RGB;
1706 case GL_SRGB_ALPHA:
1707 return GL_RGBA;
1708 case GL_SRGB8:
1709 return GL_RGB8;
1710 case GL_SRGB8_ALPHA8:
1711 return GL_RGBA8;
1712 case GL_SLUMINANCE8:
1713 return GL_LUMINANCE8;
1714 case GL_SLUMINANCE:
1715 return GL_LUMINANCE;
1716 case GL_SLUMINANCE_ALPHA:
1717 return GL_LUMINANCE_ALPHA;
1718 case GL_SLUMINANCE8_ALPHA8:
1719 return GL_LUMINANCE8_ALPHA8;
1720 default:
1721 return format;
1722 }
1723 }
1724
1725
1726 /**
1727 * Do error checking of format/type combinations for glReadPixels,
1728 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1729 * and type values, we may either generate GL_INVALID_OPERATION or
1730 * GL_INVALID_ENUM.
1731 *
1732 * \param format pixel format.
1733 * \param type pixel type.
1734 *
1735 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1736 */
1737 GLenum
1738 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1739 GLenum format, GLenum type)
1740 {
1741 /* From OpenGL 3.3 spec, page 220:
1742 * "If the format is DEPTH_STENCIL, then values are taken from
1743 * both the depth buffer and the stencil buffer. If there is no
1744 * depth buffer or if there is no stencil buffer, then the error
1745 * INVALID_OPERATION occurs. If the type parameter is not
1746 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1747 * error INVALID_ENUM occurs."
1748 *
1749 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1750 * cannot be used to read depth or stencil in that API.
1751 */
1752 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1753 && type != GL_UNSIGNED_INT_24_8
1754 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1755 return GL_INVALID_ENUM;
1756
1757 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1758 switch (type) {
1759 case GL_BITMAP:
1760 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1761 return GL_INVALID_ENUM;
1762 }
1763 break;
1764
1765 case GL_UNSIGNED_BYTE_3_3_2:
1766 case GL_UNSIGNED_BYTE_2_3_3_REV:
1767 case GL_UNSIGNED_SHORT_5_6_5:
1768 case GL_UNSIGNED_SHORT_5_6_5_REV:
1769 if (format == GL_RGB) {
1770 break; /* OK */
1771 }
1772 if (format == GL_RGB_INTEGER_EXT &&
1773 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1774 break; /* OK */
1775 }
1776 return GL_INVALID_OPERATION;
1777
1778 case GL_UNSIGNED_SHORT_4_4_4_4:
1779 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1780 case GL_UNSIGNED_INT_8_8_8_8:
1781 case GL_UNSIGNED_INT_8_8_8_8_REV:
1782 if (format == GL_RGBA ||
1783 format == GL_BGRA ||
1784 format == GL_ABGR_EXT) {
1785 break; /* OK */
1786 }
1787 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1788 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1789 break; /* OK */
1790 }
1791 return GL_INVALID_OPERATION;
1792
1793 case GL_UNSIGNED_SHORT_5_5_5_1:
1794 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1795 case GL_UNSIGNED_INT_10_10_10_2:
1796 case GL_UNSIGNED_INT_2_10_10_10_REV:
1797 if (format == GL_RGBA ||
1798 format == GL_BGRA) {
1799 break; /* OK */
1800 }
1801 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1802 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1803 break; /* OK */
1804 }
1805 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1806 ctx->API == API_OPENGLES2) {
1807 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1808 }
1809 return GL_INVALID_OPERATION;
1810
1811 case GL_UNSIGNED_INT_24_8:
1812 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1813 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1814 return GL_NO_ERROR;
1815
1816 if (format != GL_DEPTH_STENCIL) {
1817 return GL_INVALID_OPERATION;
1818 }
1819 return GL_NO_ERROR;
1820
1821 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1822 if (!ctx->Extensions.ARB_depth_buffer_float) {
1823 return GL_INVALID_ENUM;
1824 }
1825 if (format != GL_DEPTH_STENCIL) {
1826 return GL_INVALID_OPERATION;
1827 }
1828 return GL_NO_ERROR;
1829
1830 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1831 if (!ctx->Extensions.EXT_packed_float) {
1832 return GL_INVALID_ENUM;
1833 }
1834 if (format != GL_RGB) {
1835 return GL_INVALID_OPERATION;
1836 }
1837 return GL_NO_ERROR;
1838
1839 case GL_HALF_FLOAT_OES:
1840 switch (format) {
1841 case GL_RGBA:
1842 case GL_RGB:
1843 case GL_LUMINANCE_ALPHA:
1844 case GL_LUMINANCE:
1845 case GL_ALPHA:
1846 return GL_NO_ERROR;
1847 case GL_RG:
1848 case GL_RED:
1849 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1850 return GL_NO_ERROR;
1851 default:
1852 return GL_INVALID_OPERATION;
1853 }
1854
1855 default:
1856 ; /* fall-through */
1857 }
1858
1859 /* now, for each format, check the type for compatibility */
1860 switch (format) {
1861 case GL_COLOR_INDEX:
1862 case GL_STENCIL_INDEX:
1863 switch (type) {
1864 case GL_BITMAP:
1865 case GL_BYTE:
1866 case GL_UNSIGNED_BYTE:
1867 case GL_SHORT:
1868 case GL_UNSIGNED_SHORT:
1869 case GL_INT:
1870 case GL_UNSIGNED_INT:
1871 case GL_FLOAT:
1872 case GL_HALF_FLOAT:
1873 return GL_NO_ERROR;
1874 default:
1875 return GL_INVALID_ENUM;
1876 }
1877
1878 case GL_RED:
1879 case GL_GREEN:
1880 case GL_BLUE:
1881 case GL_ALPHA:
1882 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1883 case GL_INTENSITY:
1884 #endif
1885 case GL_LUMINANCE:
1886 case GL_LUMINANCE_ALPHA:
1887 case GL_DEPTH_COMPONENT:
1888 switch (type) {
1889 case GL_BYTE:
1890 case GL_UNSIGNED_BYTE:
1891 case GL_SHORT:
1892 case GL_UNSIGNED_SHORT:
1893 case GL_INT:
1894 case GL_UNSIGNED_INT:
1895 case GL_FLOAT:
1896 case GL_HALF_FLOAT:
1897 return GL_NO_ERROR;
1898 default:
1899 return GL_INVALID_ENUM;
1900 }
1901
1902 case GL_RG:
1903 if (!ctx->Extensions.ARB_texture_rg)
1904 return GL_INVALID_ENUM;
1905 switch (type) {
1906 case GL_BYTE:
1907 case GL_UNSIGNED_BYTE:
1908 case GL_SHORT:
1909 case GL_UNSIGNED_SHORT:
1910 case GL_INT:
1911 case GL_UNSIGNED_INT:
1912 case GL_FLOAT:
1913 case GL_HALF_FLOAT:
1914 return GL_NO_ERROR;
1915 default:
1916 return GL_INVALID_ENUM;
1917 }
1918
1919 case GL_RGB:
1920 switch (type) {
1921 case GL_BYTE:
1922 case GL_UNSIGNED_BYTE:
1923 case GL_SHORT:
1924 case GL_UNSIGNED_SHORT:
1925 case GL_INT:
1926 case GL_UNSIGNED_INT:
1927 case GL_FLOAT:
1928 case GL_UNSIGNED_BYTE_3_3_2:
1929 case GL_UNSIGNED_BYTE_2_3_3_REV:
1930 case GL_UNSIGNED_SHORT_5_6_5:
1931 case GL_UNSIGNED_SHORT_5_6_5_REV:
1932 case GL_HALF_FLOAT:
1933 return GL_NO_ERROR;
1934 case GL_UNSIGNED_INT_2_10_10_10_REV:
1935 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1936 return (ctx->API == API_OPENGLES2)
1937 ? GL_NO_ERROR : GL_INVALID_ENUM;
1938 case GL_UNSIGNED_INT_5_9_9_9_REV:
1939 return ctx->Extensions.EXT_texture_shared_exponent
1940 ? GL_NO_ERROR : GL_INVALID_ENUM;
1941 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1942 return ctx->Extensions.EXT_packed_float
1943 ? GL_NO_ERROR : GL_INVALID_ENUM;
1944 default:
1945 return GL_INVALID_ENUM;
1946 }
1947
1948 case GL_BGR:
1949 switch (type) {
1950 /* NOTE: no packed types are supported with BGR. That's
1951 * intentional, according to the GL spec.
1952 */
1953 case GL_BYTE:
1954 case GL_UNSIGNED_BYTE:
1955 case GL_SHORT:
1956 case GL_UNSIGNED_SHORT:
1957 case GL_INT:
1958 case GL_UNSIGNED_INT:
1959 case GL_FLOAT:
1960 case GL_HALF_FLOAT:
1961 return GL_NO_ERROR;
1962 default:
1963 return GL_INVALID_ENUM;
1964 }
1965
1966 case GL_RGBA:
1967 case GL_BGRA:
1968 switch (type) {
1969 case GL_BYTE:
1970 case GL_UNSIGNED_BYTE:
1971 case GL_SHORT:
1972 case GL_UNSIGNED_SHORT:
1973 case GL_INT:
1974 case GL_UNSIGNED_INT:
1975 case GL_FLOAT:
1976 case GL_UNSIGNED_SHORT_4_4_4_4:
1977 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1978 case GL_UNSIGNED_SHORT_5_5_5_1:
1979 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1980 case GL_UNSIGNED_INT_8_8_8_8:
1981 case GL_UNSIGNED_INT_8_8_8_8_REV:
1982 case GL_UNSIGNED_INT_10_10_10_2:
1983 case GL_UNSIGNED_INT_2_10_10_10_REV:
1984 case GL_HALF_FLOAT:
1985 return GL_NO_ERROR;
1986 default:
1987 return GL_INVALID_ENUM;
1988 }
1989
1990 case GL_ABGR_EXT:
1991 switch (type) {
1992 case GL_BYTE:
1993 case GL_UNSIGNED_BYTE:
1994 case GL_SHORT:
1995 case GL_UNSIGNED_SHORT:
1996 case GL_INT:
1997 case GL_UNSIGNED_INT:
1998 case GL_FLOAT:
1999 case GL_UNSIGNED_SHORT_4_4_4_4:
2000 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2001 case GL_UNSIGNED_INT_8_8_8_8:
2002 case GL_UNSIGNED_INT_8_8_8_8_REV:
2003 case GL_HALF_FLOAT:
2004 return GL_NO_ERROR;
2005 default:
2006 return GL_INVALID_ENUM;
2007 }
2008
2009 case GL_YCBCR_MESA:
2010 if (!ctx->Extensions.MESA_ycbcr_texture)
2011 return GL_INVALID_ENUM;
2012 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2013 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2014 return GL_NO_ERROR;
2015 else
2016 return GL_INVALID_OPERATION;
2017
2018 case GL_DEPTH_STENCIL:
2019 if (type == GL_UNSIGNED_INT_24_8)
2020 return GL_NO_ERROR;
2021 else if (ctx->Extensions.ARB_depth_buffer_float &&
2022 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2023 return GL_NO_ERROR;
2024 else
2025 return GL_INVALID_ENUM;
2026
2027 /* integer-valued formats */
2028 case GL_RED_INTEGER_EXT:
2029 case GL_GREEN_INTEGER_EXT:
2030 case GL_BLUE_INTEGER_EXT:
2031 case GL_ALPHA_INTEGER_EXT:
2032 case GL_RG_INTEGER:
2033 switch (type) {
2034 case GL_BYTE:
2035 case GL_UNSIGNED_BYTE:
2036 case GL_SHORT:
2037 case GL_UNSIGNED_SHORT:
2038 case GL_INT:
2039 case GL_UNSIGNED_INT:
2040 return (ctx->Version >= 30 ||
2041 ctx->Extensions.EXT_texture_integer)
2042 ? GL_NO_ERROR : GL_INVALID_ENUM;
2043 default:
2044 return GL_INVALID_ENUM;
2045 }
2046
2047 case GL_RGB_INTEGER_EXT:
2048 switch (type) {
2049 case GL_BYTE:
2050 case GL_UNSIGNED_BYTE:
2051 case GL_SHORT:
2052 case GL_UNSIGNED_SHORT:
2053 case GL_INT:
2054 case GL_UNSIGNED_INT:
2055 return (ctx->Version >= 30 ||
2056 ctx->Extensions.EXT_texture_integer)
2057 ? GL_NO_ERROR : GL_INVALID_ENUM;
2058 case GL_UNSIGNED_BYTE_3_3_2:
2059 case GL_UNSIGNED_BYTE_2_3_3_REV:
2060 case GL_UNSIGNED_SHORT_5_6_5:
2061 case GL_UNSIGNED_SHORT_5_6_5_REV:
2062 return ctx->Extensions.ARB_texture_rgb10_a2ui
2063 ? GL_NO_ERROR : GL_INVALID_ENUM;
2064 default:
2065 return GL_INVALID_ENUM;
2066 }
2067
2068 case GL_BGR_INTEGER_EXT:
2069 switch (type) {
2070 case GL_BYTE:
2071 case GL_UNSIGNED_BYTE:
2072 case GL_SHORT:
2073 case GL_UNSIGNED_SHORT:
2074 case GL_INT:
2075 case GL_UNSIGNED_INT:
2076 /* NOTE: no packed formats w/ BGR format */
2077 return (ctx->Version >= 30 ||
2078 ctx->Extensions.EXT_texture_integer)
2079 ? GL_NO_ERROR : GL_INVALID_ENUM;
2080 default:
2081 return GL_INVALID_ENUM;
2082 }
2083
2084 case GL_RGBA_INTEGER_EXT:
2085 case GL_BGRA_INTEGER_EXT:
2086 switch (type) {
2087 case GL_BYTE:
2088 case GL_UNSIGNED_BYTE:
2089 case GL_SHORT:
2090 case GL_UNSIGNED_SHORT:
2091 case GL_INT:
2092 case GL_UNSIGNED_INT:
2093 return (ctx->Version >= 30 ||
2094 ctx->Extensions.EXT_texture_integer)
2095 ? GL_NO_ERROR : GL_INVALID_ENUM;
2096 case GL_UNSIGNED_SHORT_4_4_4_4:
2097 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2098 case GL_UNSIGNED_SHORT_5_5_5_1:
2099 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2100 case GL_UNSIGNED_INT_8_8_8_8:
2101 case GL_UNSIGNED_INT_8_8_8_8_REV:
2102 case GL_UNSIGNED_INT_10_10_10_2:
2103 case GL_UNSIGNED_INT_2_10_10_10_REV:
2104 return ctx->Extensions.ARB_texture_rgb10_a2ui
2105 ? GL_NO_ERROR : GL_INVALID_ENUM;
2106 default:
2107 return GL_INVALID_ENUM;
2108 }
2109
2110 case GL_LUMINANCE_INTEGER_EXT:
2111 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2112 switch (type) {
2113 case GL_BYTE:
2114 case GL_UNSIGNED_BYTE:
2115 case GL_SHORT:
2116 case GL_UNSIGNED_SHORT:
2117 case GL_INT:
2118 case GL_UNSIGNED_INT:
2119 return ctx->Extensions.EXT_texture_integer
2120 ? GL_NO_ERROR : GL_INVALID_ENUM;
2121 default:
2122 return GL_INVALID_ENUM;
2123 }
2124
2125 default:
2126 return GL_INVALID_ENUM;
2127 }
2128 return GL_NO_ERROR;
2129 }
2130
2131
2132 /**
2133 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2134 * and glTex[Sub]Image.
2135 * \return error code, or GL_NO_ERROR.
2136 */
2137 GLenum
2138 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2139 GLenum format, GLenum type,
2140 unsigned dimensions)
2141 {
2142 GLboolean type_valid = GL_TRUE;
2143
2144 switch (format) {
2145 case GL_RED:
2146 case GL_RG:
2147 if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_texture_rg)
2148 return GL_INVALID_VALUE;
2149 /* fallthrough */
2150 case GL_ALPHA:
2151 case GL_LUMINANCE:
2152 case GL_LUMINANCE_ALPHA:
2153 type_valid = (type == GL_UNSIGNED_BYTE
2154 || type == GL_FLOAT
2155 || type == GL_HALF_FLOAT_OES);
2156 break;
2157
2158 case GL_RGB:
2159 type_valid = (type == GL_UNSIGNED_BYTE
2160 || type == GL_UNSIGNED_SHORT_5_6_5
2161 || type == GL_FLOAT
2162 || type == GL_HALF_FLOAT_OES);
2163 break;
2164
2165 case GL_RGBA:
2166 type_valid = (type == GL_UNSIGNED_BYTE
2167 || type == GL_UNSIGNED_SHORT_4_4_4_4
2168 || type == GL_UNSIGNED_SHORT_5_5_5_1
2169 || type == GL_FLOAT
2170 || type == GL_HALF_FLOAT_OES
2171 || type == GL_UNSIGNED_INT_2_10_10_10_REV);
2172 break;
2173
2174 case GL_DEPTH_COMPONENT:
2175 /* This format is filtered against invalid dimensionalities elsewhere.
2176 */
2177 type_valid = (type == GL_UNSIGNED_SHORT
2178 || type == GL_UNSIGNED_INT);
2179 break;
2180
2181 case GL_DEPTH_STENCIL:
2182 /* This format is filtered against invalid dimensionalities elsewhere.
2183 */
2184 type_valid = (type == GL_UNSIGNED_INT_24_8);
2185 break;
2186
2187 case GL_BGRA_EXT:
2188 type_valid = (type == GL_UNSIGNED_BYTE);
2189
2190 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2191 * the format does not appear to be allowed for 3D textures in OpenGL
2192 * ES.
2193 */
2194 if (dimensions != 2)
2195 return GL_INVALID_VALUE;
2196
2197 break;
2198
2199 default:
2200 return GL_INVALID_VALUE;
2201 }
2202
2203 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2204 }
2205
2206 /**
2207 * Return the simple base format for a given internal texture format.
2208 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2209 *
2210 * \param ctx GL context.
2211 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2212 *
2213 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2214 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2215 *
2216 * This is the format which is used during texture application (i.e. the
2217 * texture format and env mode determine the arithmetic used.
2218 */
2219 GLint
2220 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2221 {
2222 switch (internalFormat) {
2223 case GL_ALPHA:
2224 case GL_ALPHA4:
2225 case GL_ALPHA8:
2226 case GL_ALPHA12:
2227 case GL_ALPHA16:
2228 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2229 case 1:
2230 case GL_LUMINANCE:
2231 case GL_LUMINANCE4:
2232 case GL_LUMINANCE8:
2233 case GL_LUMINANCE12:
2234 case GL_LUMINANCE16:
2235 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2236 case 2:
2237 case GL_LUMINANCE_ALPHA:
2238 case GL_LUMINANCE4_ALPHA4:
2239 case GL_LUMINANCE6_ALPHA2:
2240 case GL_LUMINANCE8_ALPHA8:
2241 case GL_LUMINANCE12_ALPHA4:
2242 case GL_LUMINANCE12_ALPHA12:
2243 case GL_LUMINANCE16_ALPHA16:
2244 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2245 case GL_INTENSITY:
2246 case GL_INTENSITY4:
2247 case GL_INTENSITY8:
2248 case GL_INTENSITY12:
2249 case GL_INTENSITY16:
2250 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2251 case 3:
2252 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2253 case GL_RGB:
2254 case GL_R3_G3_B2:
2255 case GL_RGB4:
2256 case GL_RGB5:
2257 case GL_RGB8:
2258 case GL_RGB10:
2259 case GL_RGB12:
2260 case GL_RGB16:
2261 return GL_RGB;
2262 case 4:
2263 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2264 case GL_RGBA:
2265 case GL_RGBA2:
2266 case GL_RGBA4:
2267 case GL_RGB5_A1:
2268 case GL_RGBA8:
2269 case GL_RGB10_A2:
2270 case GL_RGBA12:
2271 case GL_RGBA16:
2272 return GL_RGBA;
2273 default:
2274 ; /* fallthrough */
2275 }
2276
2277 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2278 */
2279 if (_mesa_is_gles(ctx)) {
2280 switch (internalFormat) {
2281 case GL_BGRA:
2282 return GL_RGBA;
2283 default:
2284 ; /* fallthrough */
2285 }
2286 }
2287
2288 if (ctx->Extensions.ARB_ES2_compatibility) {
2289 switch (internalFormat) {
2290 case GL_RGB565:
2291 return GL_RGB;
2292 default:
2293 ; /* fallthrough */
2294 }
2295 }
2296
2297 if (ctx->Extensions.ARB_depth_texture) {
2298 switch (internalFormat) {
2299 case GL_DEPTH_COMPONENT:
2300 case GL_DEPTH_COMPONENT16:
2301 case GL_DEPTH_COMPONENT24:
2302 case GL_DEPTH_COMPONENT32:
2303 return GL_DEPTH_COMPONENT;
2304 case GL_DEPTH_STENCIL:
2305 case GL_DEPTH24_STENCIL8:
2306 return GL_DEPTH_STENCIL;
2307 default:
2308 ; /* fallthrough */
2309 }
2310 }
2311
2312 if (ctx->Extensions.ARB_texture_stencil8) {
2313 switch (internalFormat) {
2314 case GL_STENCIL_INDEX:
2315 case GL_STENCIL_INDEX1:
2316 case GL_STENCIL_INDEX4:
2317 case GL_STENCIL_INDEX8:
2318 case GL_STENCIL_INDEX16:
2319 return GL_STENCIL_INDEX;
2320 default:
2321 ; /* fallthrough */
2322 }
2323 }
2324
2325 switch (internalFormat) {
2326 case GL_COMPRESSED_ALPHA:
2327 return GL_ALPHA;
2328 case GL_COMPRESSED_LUMINANCE:
2329 return GL_LUMINANCE;
2330 case GL_COMPRESSED_LUMINANCE_ALPHA:
2331 return GL_LUMINANCE_ALPHA;
2332 case GL_COMPRESSED_INTENSITY:
2333 return GL_INTENSITY;
2334 case GL_COMPRESSED_RGB:
2335 return GL_RGB;
2336 case GL_COMPRESSED_RGBA:
2337 return GL_RGBA;
2338 default:
2339 ; /* fallthrough */
2340 }
2341
2342 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2343 GLenum base_compressed =
2344 _mesa_gl_compressed_format_base_format(internalFormat);
2345 if (base_compressed)
2346 return base_compressed;
2347 }
2348
2349 if (ctx->Extensions.KHR_texture_compression_astc_ldr &&
2350 _mesa_is_astc_format(internalFormat))
2351 return GL_RGBA;
2352
2353 if (ctx->Extensions.MESA_ycbcr_texture) {
2354 if (internalFormat == GL_YCBCR_MESA)
2355 return GL_YCBCR_MESA;
2356 }
2357
2358 if (ctx->Extensions.ARB_texture_float) {
2359 switch (internalFormat) {
2360 case GL_ALPHA16F_ARB:
2361 case GL_ALPHA32F_ARB:
2362 return GL_ALPHA;
2363 case GL_RGBA16F_ARB:
2364 case GL_RGBA32F_ARB:
2365 return GL_RGBA;
2366 case GL_RGB16F_ARB:
2367 case GL_RGB32F_ARB:
2368 return GL_RGB;
2369 case GL_INTENSITY16F_ARB:
2370 case GL_INTENSITY32F_ARB:
2371 return GL_INTENSITY;
2372 case GL_LUMINANCE16F_ARB:
2373 case GL_LUMINANCE32F_ARB:
2374 return GL_LUMINANCE;
2375 case GL_LUMINANCE_ALPHA16F_ARB:
2376 case GL_LUMINANCE_ALPHA32F_ARB:
2377 return GL_LUMINANCE_ALPHA;
2378 default:
2379 ; /* fallthrough */
2380 }
2381 }
2382
2383 if (ctx->Extensions.EXT_texture_snorm) {
2384 switch (internalFormat) {
2385 case GL_RED_SNORM:
2386 case GL_R8_SNORM:
2387 case GL_R16_SNORM:
2388 return GL_RED;
2389 case GL_RG_SNORM:
2390 case GL_RG8_SNORM:
2391 case GL_RG16_SNORM:
2392 return GL_RG;
2393 case GL_RGB_SNORM:
2394 case GL_RGB8_SNORM:
2395 case GL_RGB16_SNORM:
2396 return GL_RGB;
2397 case GL_RGBA_SNORM:
2398 case GL_RGBA8_SNORM:
2399 case GL_RGBA16_SNORM:
2400 return GL_RGBA;
2401 case GL_ALPHA_SNORM:
2402 case GL_ALPHA8_SNORM:
2403 case GL_ALPHA16_SNORM:
2404 return GL_ALPHA;
2405 case GL_LUMINANCE_SNORM:
2406 case GL_LUMINANCE8_SNORM:
2407 case GL_LUMINANCE16_SNORM:
2408 return GL_LUMINANCE;
2409 case GL_LUMINANCE_ALPHA_SNORM:
2410 case GL_LUMINANCE8_ALPHA8_SNORM:
2411 case GL_LUMINANCE16_ALPHA16_SNORM:
2412 return GL_LUMINANCE_ALPHA;
2413 case GL_INTENSITY_SNORM:
2414 case GL_INTENSITY8_SNORM:
2415 case GL_INTENSITY16_SNORM:
2416 return GL_INTENSITY;
2417 default:
2418 ; /* fallthrough */
2419 }
2420 }
2421
2422 if (ctx->Extensions.EXT_texture_sRGB) {
2423 switch (internalFormat) {
2424 case GL_SRGB_EXT:
2425 case GL_SRGB8_EXT:
2426 case GL_COMPRESSED_SRGB_EXT:
2427 return GL_RGB;
2428 case GL_SRGB_ALPHA_EXT:
2429 case GL_SRGB8_ALPHA8_EXT:
2430 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2431 return GL_RGBA;
2432 case GL_SLUMINANCE_ALPHA_EXT:
2433 case GL_SLUMINANCE8_ALPHA8_EXT:
2434 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2435 return GL_LUMINANCE_ALPHA;
2436 case GL_SLUMINANCE_EXT:
2437 case GL_SLUMINANCE8_EXT:
2438 case GL_COMPRESSED_SLUMINANCE_EXT:
2439 return GL_LUMINANCE;
2440 default:
2441 ; /* fallthrough */
2442 }
2443 }
2444
2445 if (ctx->Version >= 30 ||
2446 ctx->Extensions.EXT_texture_integer) {
2447 switch (internalFormat) {
2448 case GL_RGBA8UI_EXT:
2449 case GL_RGBA16UI_EXT:
2450 case GL_RGBA32UI_EXT:
2451 case GL_RGBA8I_EXT:
2452 case GL_RGBA16I_EXT:
2453 case GL_RGBA32I_EXT:
2454 case GL_RGB10_A2UI:
2455 return GL_RGBA;
2456 case GL_RGB8UI_EXT:
2457 case GL_RGB16UI_EXT:
2458 case GL_RGB32UI_EXT:
2459 case GL_RGB8I_EXT:
2460 case GL_RGB16I_EXT:
2461 case GL_RGB32I_EXT:
2462 return GL_RGB;
2463 }
2464 }
2465
2466 if (ctx->Extensions.EXT_texture_integer) {
2467 switch (internalFormat) {
2468 case GL_ALPHA8UI_EXT:
2469 case GL_ALPHA16UI_EXT:
2470 case GL_ALPHA32UI_EXT:
2471 case GL_ALPHA8I_EXT:
2472 case GL_ALPHA16I_EXT:
2473 case GL_ALPHA32I_EXT:
2474 return GL_ALPHA;
2475 case GL_INTENSITY8UI_EXT:
2476 case GL_INTENSITY16UI_EXT:
2477 case GL_INTENSITY32UI_EXT:
2478 case GL_INTENSITY8I_EXT:
2479 case GL_INTENSITY16I_EXT:
2480 case GL_INTENSITY32I_EXT:
2481 return GL_INTENSITY;
2482 case GL_LUMINANCE8UI_EXT:
2483 case GL_LUMINANCE16UI_EXT:
2484 case GL_LUMINANCE32UI_EXT:
2485 case GL_LUMINANCE8I_EXT:
2486 case GL_LUMINANCE16I_EXT:
2487 case GL_LUMINANCE32I_EXT:
2488 return GL_LUMINANCE;
2489 case GL_LUMINANCE_ALPHA8UI_EXT:
2490 case GL_LUMINANCE_ALPHA16UI_EXT:
2491 case GL_LUMINANCE_ALPHA32UI_EXT:
2492 case GL_LUMINANCE_ALPHA8I_EXT:
2493 case GL_LUMINANCE_ALPHA16I_EXT:
2494 case GL_LUMINANCE_ALPHA32I_EXT:
2495 return GL_LUMINANCE_ALPHA;
2496 default:
2497 ; /* fallthrough */
2498 }
2499 }
2500
2501 if (ctx->Extensions.ARB_texture_rg) {
2502 switch (internalFormat) {
2503 case GL_R16F:
2504 case GL_R32F:
2505 if (!ctx->Extensions.ARB_texture_float)
2506 break;
2507 return GL_RED;
2508 case GL_R8I:
2509 case GL_R8UI:
2510 case GL_R16I:
2511 case GL_R16UI:
2512 case GL_R32I:
2513 case GL_R32UI:
2514 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2515 break;
2516 /* FALLTHROUGH */
2517 case GL_R8:
2518 case GL_R16:
2519 case GL_RED:
2520 case GL_COMPRESSED_RED:
2521 return GL_RED;
2522
2523 case GL_RG16F:
2524 case GL_RG32F:
2525 if (!ctx->Extensions.ARB_texture_float)
2526 break;
2527 return GL_RG;
2528 case GL_RG8I:
2529 case GL_RG8UI:
2530 case GL_RG16I:
2531 case GL_RG16UI:
2532 case GL_RG32I:
2533 case GL_RG32UI:
2534 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2535 break;
2536 /* FALLTHROUGH */
2537 case GL_RG:
2538 case GL_RG8:
2539 case GL_RG16:
2540 case GL_COMPRESSED_RG:
2541 return GL_RG;
2542 default:
2543 ; /* fallthrough */
2544 }
2545 }
2546
2547 if (ctx->Extensions.EXT_texture_shared_exponent) {
2548 switch (internalFormat) {
2549 case GL_RGB9_E5_EXT:
2550 return GL_RGB;
2551 default:
2552 ; /* fallthrough */
2553 }
2554 }
2555
2556 if (ctx->Extensions.EXT_packed_float) {
2557 switch (internalFormat) {
2558 case GL_R11F_G11F_B10F_EXT:
2559 return GL_RGB;
2560 default:
2561 ; /* fallthrough */
2562 }
2563 }
2564
2565 if (ctx->Extensions.ARB_depth_buffer_float) {
2566 switch (internalFormat) {
2567 case GL_DEPTH_COMPONENT32F:
2568 return GL_DEPTH_COMPONENT;
2569 case GL_DEPTH32F_STENCIL8:
2570 return GL_DEPTH_STENCIL;
2571 default:
2572 ; /* fallthrough */
2573 }
2574 }
2575
2576 return -1; /* error */
2577 }
2578
2579 /**
2580 * Returns the effective internal format from a texture format and type.
2581 * This is used by texture image operations internally for validation, when
2582 * the specified internal format is a base (unsized) format.
2583 *
2584 * This method will only return a valid effective internal format if the
2585 * combination of format, type and internal format in base form, is acceptable.
2586 *
2587 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2588 * in extensions, to unambiguously correspond to the given base format, then
2589 * that internal format is returned as the effective. Otherwise, if the
2590 * combination is accepted but a single effective format is not defined, the
2591 * passed base format will be returned instead.
2592 *
2593 * \param format the texture format
2594 * \param type the texture type
2595 */
2596 static GLenum
2597 _mesa_es3_effective_internal_format_for_format_and_type(GLenum format,
2598 GLenum type)
2599 {
2600 switch (type) {
2601 case GL_UNSIGNED_BYTE:
2602 switch (format) {
2603 case GL_RGBA:
2604 return GL_RGBA8;
2605 case GL_RGB:
2606 return GL_RGB8;
2607 case GL_RG:
2608 return GL_RG8;
2609 case GL_RED:
2610 return GL_R8;
2611 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2612 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2613 * internal formats, they do not correspond to GL constants, so the base
2614 * format is returned instead.
2615 */
2616 case GL_BGRA_EXT:
2617 case GL_LUMINANCE_ALPHA:
2618 case GL_LUMINANCE:
2619 case GL_ALPHA:
2620 return format;
2621 }
2622 break;
2623
2624 case GL_UNSIGNED_SHORT_4_4_4_4:
2625 if (format == GL_RGBA)
2626 return GL_RGBA4;
2627 break;
2628
2629 case GL_UNSIGNED_SHORT_5_5_5_1:
2630 if (format == GL_RGBA)
2631 return GL_RGB5_A1;
2632 break;
2633
2634 case GL_UNSIGNED_SHORT_5_6_5:
2635 if (format == GL_RGB)
2636 return GL_RGB565;
2637 break;
2638
2639 /* OES_packed_depth_stencil */
2640 case GL_UNSIGNED_INT_24_8:
2641 if (format == GL_DEPTH_STENCIL)
2642 return GL_DEPTH24_STENCIL8;
2643 break;
2644
2645 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2646 if (format == GL_DEPTH_STENCIL)
2647 return GL_DEPTH32F_STENCIL8;
2648 break;
2649
2650 case GL_UNSIGNED_SHORT:
2651 if (format == GL_DEPTH_COMPONENT)
2652 return GL_DEPTH_COMPONENT16;
2653 break;
2654
2655 case GL_UNSIGNED_INT:
2656 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2657 * the format.
2658 */
2659 if (format == GL_DEPTH_COMPONENT)
2660 return format;
2661 break;
2662
2663 /* OES_texture_float and OES_texture_half_float */
2664 case GL_FLOAT:
2665 if (format == GL_DEPTH_COMPONENT)
2666 return GL_DEPTH_COMPONENT32F;
2667 /* fall through */
2668 case GL_HALF_FLOAT_OES:
2669 switch (format) {
2670 case GL_RGBA:
2671 case GL_RGB:
2672 case GL_LUMINANCE_ALPHA:
2673 case GL_LUMINANCE:
2674 case GL_ALPHA:
2675 case GL_RED:
2676 case GL_RG:
2677 return format;
2678 }
2679 break;
2680 case GL_HALF_FLOAT:
2681 switch (format) {
2682 case GL_RG:
2683 case GL_RED:
2684 return format;
2685 }
2686 break;
2687
2688 /* GL_EXT_texture_type_2_10_10_10_REV */
2689 case GL_UNSIGNED_INT_2_10_10_10_REV:
2690 switch (format) {
2691 case GL_RGBA:
2692 case GL_RGB:
2693 return format;
2694 }
2695 break;
2696
2697 default:
2698 /* fall through and return NONE */
2699 break;
2700 }
2701
2702 return GL_NONE;
2703 }
2704
2705 /**
2706 * Do error checking of format/type combinations for OpenGL ES 3
2707 * glTex[Sub]Image.
2708 * \return error code, or GL_NO_ERROR.
2709 */
2710 GLenum
2711 _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
2712 GLenum format, GLenum type,
2713 GLenum internalFormat)
2714 {
2715 /* If internalFormat is an unsized format, then the effective internal
2716 * format derived from format and type should be used instead. Page 127,
2717 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2718 *
2719 * "if internalformat is a base internal format, the effective
2720 * internal format is a sized internal format that is derived
2721 * from the format and type for internal use by the GL.
2722 * Table 3.12 specifies the mapping of format and type to effective
2723 * internal formats. The effective internal format is used by the GL
2724 * for purposes such as texture completeness or type checks for
2725 * CopyTex* commands. In these cases, the GL is required to operate
2726 * as if the effective internal format was used as the internalformat
2727 * when specifying the texture data."
2728 */
2729 if (_mesa_is_enum_format_unsized(internalFormat)) {
2730 GLenum effectiveInternalFormat =
2731 _mesa_es3_effective_internal_format_for_format_and_type(format, type);
2732
2733 if (effectiveInternalFormat == GL_NONE)
2734 return GL_INVALID_OPERATION;
2735
2736 GLenum baseInternalFormat;
2737 if (internalFormat == GL_BGRA_EXT) {
2738 /* Unfortunately, _mesa_base_tex_format returns a base format of
2739 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2740 * asking the question, "what channels does this format have?"
2741 * However, if we're trying to determine if two internal formats
2742 * match in the ES3 sense, we actually want GL_BGRA.
2743 */
2744 baseInternalFormat = GL_BGRA_EXT;
2745 } else {
2746 baseInternalFormat =
2747 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2748 }
2749
2750 if (internalFormat != baseInternalFormat)
2751 return GL_INVALID_OPERATION;
2752
2753 internalFormat = effectiveInternalFormat;
2754 }
2755
2756 switch (format) {
2757 case GL_BGRA_EXT:
2758 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2759 return GL_INVALID_OPERATION;
2760 break;
2761
2762 case GL_RGBA:
2763 switch (type) {
2764 case GL_UNSIGNED_BYTE:
2765 switch (internalFormat) {
2766 case GL_RGBA:
2767 case GL_RGBA8:
2768 case GL_RGB5_A1:
2769 case GL_RGBA4:
2770 case GL_SRGB8_ALPHA8_EXT:
2771 break;
2772 default:
2773 return GL_INVALID_OPERATION;
2774 }
2775 break;
2776
2777 case GL_BYTE:
2778 if (internalFormat != GL_RGBA8_SNORM)
2779 return GL_INVALID_OPERATION;
2780 break;
2781
2782 case GL_UNSIGNED_SHORT_4_4_4_4:
2783 switch (internalFormat) {
2784 case GL_RGBA:
2785 case GL_RGBA4:
2786 break;
2787 default:
2788 return GL_INVALID_OPERATION;
2789 }
2790 break;
2791
2792 case GL_UNSIGNED_SHORT_5_5_5_1:
2793 switch (internalFormat) {
2794 case GL_RGBA:
2795 case GL_RGB5_A1:
2796 break;
2797 default:
2798 return GL_INVALID_OPERATION;
2799 }
2800 break;
2801
2802 case GL_UNSIGNED_INT_2_10_10_10_REV:
2803 switch (internalFormat) {
2804 case GL_RGBA: /* GL_EXT_texture_type_2_10_10_10_REV */
2805 case GL_RGB10_A2:
2806 case GL_RGB5_A1:
2807 break;
2808 default:
2809 return GL_INVALID_OPERATION;
2810 }
2811 break;
2812
2813 case GL_HALF_FLOAT:
2814 if (internalFormat != GL_RGBA16F)
2815 return GL_INVALID_OPERATION;
2816 break;
2817
2818 case GL_FLOAT:
2819 switch (internalFormat) {
2820 case GL_RGBA16F:
2821 case GL_RGBA32F:
2822 break;
2823 case GL_RGBA:
2824 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2825 break;
2826 default:
2827 return GL_INVALID_OPERATION;
2828 }
2829 break;
2830
2831 case GL_HALF_FLOAT_OES:
2832 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2833 break;
2834 default:
2835 return GL_INVALID_OPERATION;
2836 }
2837 break;
2838
2839 case GL_RGBA_INTEGER:
2840 switch (type) {
2841 case GL_UNSIGNED_BYTE:
2842 if (internalFormat != GL_RGBA8UI)
2843 return GL_INVALID_OPERATION;
2844 break;
2845
2846 case GL_BYTE:
2847 if (internalFormat != GL_RGBA8I)
2848 return GL_INVALID_OPERATION;
2849 break;
2850
2851 case GL_UNSIGNED_SHORT:
2852 if (internalFormat != GL_RGBA16UI)
2853 return GL_INVALID_OPERATION;
2854 break;
2855
2856 case GL_SHORT:
2857 if (internalFormat != GL_RGBA16I)
2858 return GL_INVALID_OPERATION;
2859 break;
2860
2861 case GL_UNSIGNED_INT:
2862 if (internalFormat != GL_RGBA32UI)
2863 return GL_INVALID_OPERATION;
2864 break;
2865
2866 case GL_INT:
2867 if (internalFormat != GL_RGBA32I)
2868 return GL_INVALID_OPERATION;
2869 break;
2870
2871 case GL_UNSIGNED_INT_2_10_10_10_REV:
2872 if (internalFormat != GL_RGB10_A2UI)
2873 return GL_INVALID_OPERATION;
2874 break;
2875
2876 default:
2877 return GL_INVALID_OPERATION;
2878 }
2879 break;
2880
2881 case GL_RGB:
2882 switch (type) {
2883 case GL_UNSIGNED_BYTE:
2884 switch (internalFormat) {
2885 case GL_RGB:
2886 case GL_RGB8:
2887 case GL_RGB565:
2888 case GL_SRGB8:
2889 break;
2890 default:
2891 return GL_INVALID_OPERATION;
2892 }
2893 break;
2894
2895 case GL_BYTE:
2896 if (internalFormat != GL_RGB8_SNORM)
2897 return GL_INVALID_OPERATION;
2898 break;
2899
2900 case GL_UNSIGNED_SHORT_5_6_5:
2901 switch (internalFormat) {
2902 case GL_RGB:
2903 case GL_RGB565:
2904 break;
2905 default:
2906 return GL_INVALID_OPERATION;
2907 }
2908 break;
2909
2910 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2911 if (internalFormat != GL_R11F_G11F_B10F)
2912 return GL_INVALID_OPERATION;
2913 break;
2914
2915 case GL_UNSIGNED_INT_5_9_9_9_REV:
2916 if (internalFormat != GL_RGB9_E5)
2917 return GL_INVALID_OPERATION;
2918 break;
2919
2920 case GL_HALF_FLOAT:
2921 switch (internalFormat) {
2922 case GL_RGB16F:
2923 case GL_R11F_G11F_B10F:
2924 case GL_RGB9_E5:
2925 break;
2926 default:
2927 return GL_INVALID_OPERATION;
2928 }
2929 break;
2930
2931 case GL_FLOAT:
2932 switch (internalFormat) {
2933 case GL_RGB16F:
2934 case GL_RGB32F:
2935 case GL_R11F_G11F_B10F:
2936 case GL_RGB9_E5:
2937 break;
2938 case GL_RGB:
2939 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2940 break;
2941 default:
2942 return GL_INVALID_OPERATION;
2943 }
2944 break;
2945
2946 case GL_HALF_FLOAT_OES:
2947 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
2948 return GL_INVALID_OPERATION;
2949 break;
2950
2951 case GL_UNSIGNED_INT_2_10_10_10_REV:
2952 switch (internalFormat) {
2953 case GL_RGB: /* GL_EXT_texture_type_2_10_10_10_REV */
2954 break;
2955 default:
2956 return GL_INVALID_OPERATION;
2957 }
2958 break;
2959
2960 default:
2961 return GL_INVALID_OPERATION;
2962 }
2963 break;
2964
2965 case GL_RGB_INTEGER:
2966 switch (type) {
2967 case GL_UNSIGNED_BYTE:
2968 if (internalFormat != GL_RGB8UI)
2969 return GL_INVALID_OPERATION;
2970 break;
2971
2972 case GL_BYTE:
2973 if (internalFormat != GL_RGB8I)
2974 return GL_INVALID_OPERATION;
2975 break;
2976
2977 case GL_UNSIGNED_SHORT:
2978 if (internalFormat != GL_RGB16UI)
2979 return GL_INVALID_OPERATION;
2980 break;
2981
2982 case GL_SHORT:
2983 if (internalFormat != GL_RGB16I)
2984 return GL_INVALID_OPERATION;
2985 break;
2986
2987 case GL_UNSIGNED_INT:
2988 if (internalFormat != GL_RGB32UI)
2989 return GL_INVALID_OPERATION;
2990 break;
2991
2992 case GL_INT:
2993 if (internalFormat != GL_RGB32I)
2994 return GL_INVALID_OPERATION;
2995 break;
2996
2997 default:
2998 return GL_INVALID_OPERATION;
2999 }
3000 break;
3001
3002 case GL_RG:
3003 switch (type) {
3004 case GL_UNSIGNED_BYTE:
3005 if (internalFormat != GL_RG8)
3006 return GL_INVALID_OPERATION;
3007 break;
3008
3009 case GL_BYTE:
3010 if (internalFormat != GL_RG8_SNORM)
3011 return GL_INVALID_OPERATION;
3012 break;
3013
3014 case GL_HALF_FLOAT:
3015 case GL_HALF_FLOAT_OES:
3016 switch (internalFormat) {
3017 case GL_RG16F:
3018 break;
3019 case GL_RG:
3020 if (ctx->Extensions.ARB_texture_rg &&
3021 ctx->Extensions.OES_texture_half_float)
3022 break;
3023 /* fallthrough */
3024 default:
3025 return GL_INVALID_OPERATION;
3026 }
3027 break;
3028
3029 case GL_FLOAT:
3030 switch (internalFormat) {
3031 case GL_RG16F:
3032 case GL_RG32F:
3033 break;
3034 case GL_RG:
3035 if (ctx->Extensions.ARB_texture_rg &&
3036 ctx->Extensions.OES_texture_float)
3037 break;
3038 /* fallthrough */
3039 default:
3040 return GL_INVALID_OPERATION;
3041 }
3042 break;
3043
3044 default:
3045 return GL_INVALID_OPERATION;
3046 }
3047 break;
3048
3049 case GL_RG_INTEGER:
3050 switch (type) {
3051 case GL_UNSIGNED_BYTE:
3052 if (internalFormat != GL_RG8UI)
3053 return GL_INVALID_OPERATION;
3054 break;
3055
3056 case GL_BYTE:
3057 if (internalFormat != GL_RG8I)
3058 return GL_INVALID_OPERATION;
3059 break;
3060
3061 case GL_UNSIGNED_SHORT:
3062 if (internalFormat != GL_RG16UI)
3063 return GL_INVALID_OPERATION;
3064 break;
3065
3066 case GL_SHORT:
3067 if (internalFormat != GL_RG16I)
3068 return GL_INVALID_OPERATION;
3069 break;
3070
3071 case GL_UNSIGNED_INT:
3072 if (internalFormat != GL_RG32UI)
3073 return GL_INVALID_OPERATION;
3074 break;
3075
3076 case GL_INT:
3077 if (internalFormat != GL_RG32I)
3078 return GL_INVALID_OPERATION;
3079 break;
3080
3081 default:
3082 return GL_INVALID_OPERATION;
3083 }
3084 break;
3085
3086 case GL_RED:
3087 switch (type) {
3088 case GL_UNSIGNED_BYTE:
3089 if (internalFormat != GL_R8)
3090 return GL_INVALID_OPERATION;
3091 break;
3092
3093 case GL_BYTE:
3094 if (internalFormat != GL_R8_SNORM)
3095 return GL_INVALID_OPERATION;
3096 break;
3097
3098 case GL_HALF_FLOAT:
3099 case GL_HALF_FLOAT_OES:
3100 switch (internalFormat) {
3101 case GL_R16F:
3102 break;
3103 case GL_RG:
3104 case GL_RED:
3105 if (ctx->Extensions.ARB_texture_rg &&
3106 ctx->Extensions.OES_texture_half_float)
3107 break;
3108 /* fallthrough */
3109 default:
3110 return GL_INVALID_OPERATION;
3111 }
3112 break;
3113
3114 case GL_FLOAT:
3115 switch (internalFormat) {
3116 case GL_R16F:
3117 case GL_R32F:
3118 break;
3119 case GL_RED:
3120 if (ctx->Extensions.ARB_texture_rg &&
3121 ctx->Extensions.OES_texture_float)
3122 break;
3123 /* fallthrough */
3124 default:
3125 return GL_INVALID_OPERATION;
3126 }
3127 break;
3128
3129 default:
3130 return GL_INVALID_OPERATION;
3131 }
3132 break;
3133
3134 case GL_RED_INTEGER:
3135 switch (type) {
3136 case GL_UNSIGNED_BYTE:
3137 if (internalFormat != GL_R8UI)
3138 return GL_INVALID_OPERATION;
3139 break;
3140
3141 case GL_BYTE:
3142 if (internalFormat != GL_R8I)
3143 return GL_INVALID_OPERATION;
3144 break;
3145
3146 case GL_UNSIGNED_SHORT:
3147 if (internalFormat != GL_R16UI)
3148 return GL_INVALID_OPERATION;
3149 break;
3150
3151 case GL_SHORT:
3152 if (internalFormat != GL_R16I)
3153 return GL_INVALID_OPERATION;
3154 break;
3155
3156 case GL_UNSIGNED_INT:
3157 if (internalFormat != GL_R32UI)
3158 return GL_INVALID_OPERATION;
3159 break;
3160
3161 case GL_INT:
3162 if (internalFormat != GL_R32I)
3163 return GL_INVALID_OPERATION;
3164 break;
3165
3166 default:
3167 return GL_INVALID_OPERATION;
3168 }
3169 break;
3170
3171 case GL_DEPTH_COMPONENT:
3172 switch (type) {
3173 case GL_UNSIGNED_SHORT:
3174 if (internalFormat != GL_DEPTH_COMPONENT
3175 && internalFormat != GL_DEPTH_COMPONENT16)
3176 return GL_INVALID_OPERATION;
3177 break;
3178
3179 case GL_UNSIGNED_INT:
3180 switch (internalFormat) {
3181 case GL_DEPTH_COMPONENT:
3182 case GL_DEPTH_COMPONENT16:
3183 case GL_DEPTH_COMPONENT24:
3184 break;
3185 default:
3186 return GL_INVALID_OPERATION;
3187 }
3188 break;
3189
3190 case GL_FLOAT:
3191 if (internalFormat != GL_DEPTH_COMPONENT32F)
3192 return GL_INVALID_OPERATION;
3193 break;
3194
3195 default:
3196 return GL_INVALID_OPERATION;
3197 }
3198 break;
3199
3200 case GL_DEPTH_STENCIL:
3201 switch (type) {
3202 case GL_UNSIGNED_INT_24_8:
3203 if (internalFormat != GL_DEPTH_STENCIL
3204 && internalFormat != GL_DEPTH24_STENCIL8)
3205 return GL_INVALID_OPERATION;
3206 break;
3207
3208 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3209 if (internalFormat != GL_DEPTH32F_STENCIL8)
3210 return GL_INVALID_OPERATION;
3211 break;
3212
3213 default:
3214 return GL_INVALID_OPERATION;
3215 }
3216 break;
3217
3218 case GL_STENCIL_INDEX:
3219 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3220 type != GL_UNSIGNED_BYTE ||
3221 internalFormat != GL_STENCIL_INDEX8) {
3222 return GL_INVALID_OPERATION;
3223 }
3224 break;
3225
3226 case GL_ALPHA:
3227 case GL_LUMINANCE:
3228 case GL_LUMINANCE_ALPHA:
3229 switch (type) {
3230 case GL_FLOAT:
3231 if (ctx->Extensions.OES_texture_float && internalFormat == format)
3232 break;
3233 case GL_HALF_FLOAT_OES:
3234 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
3235 break;
3236 default:
3237 if (type != GL_UNSIGNED_BYTE || format != internalFormat)
3238 return GL_INVALID_OPERATION;
3239 }
3240 }
3241
3242 return GL_NO_ERROR;
3243 }
3244
3245 static void
3246 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3247 {
3248 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3249 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3250 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3251 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3252 }
3253
3254 static bool
3255 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3256 {
3257 switch (format) {
3258 case GL_RGBA:
3259 case GL_RGBA_INTEGER_EXT:
3260 set_swizzle(swizzle, 0, 1, 2, 3);
3261 return true;
3262 case GL_BGRA:
3263 case GL_BGRA_INTEGER_EXT:
3264 set_swizzle(swizzle, 2, 1, 0, 3);
3265 return true;
3266 case GL_ABGR_EXT:
3267 set_swizzle(swizzle, 3, 2, 1, 0);
3268 return true;
3269 case GL_RGB:
3270 case GL_RGB_INTEGER_EXT:
3271 set_swizzle(swizzle, 0, 1, 2, 5);
3272 return true;
3273 case GL_BGR:
3274 case GL_BGR_INTEGER_EXT:
3275 set_swizzle(swizzle, 2, 1, 0, 5);
3276 return true;
3277 case GL_LUMINANCE_ALPHA:
3278 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3279 set_swizzle(swizzle, 0, 0, 0, 1);
3280 return true;
3281 case GL_RG:
3282 case GL_RG_INTEGER:
3283 set_swizzle(swizzle, 0, 1, 4, 5);
3284 return true;
3285 case GL_RED:
3286 case GL_RED_INTEGER_EXT:
3287 set_swizzle(swizzle, 0, 4, 4, 5);
3288 return true;
3289 case GL_GREEN:
3290 case GL_GREEN_INTEGER_EXT:
3291 set_swizzle(swizzle, 4, 0, 4, 5);
3292 return true;
3293 case GL_BLUE:
3294 case GL_BLUE_INTEGER_EXT:
3295 set_swizzle(swizzle, 4, 4, 0, 5);
3296 return true;
3297 case GL_ALPHA:
3298 case GL_ALPHA_INTEGER_EXT:
3299 set_swizzle(swizzle, 4, 4, 4, 0);
3300 return true;
3301 case GL_LUMINANCE:
3302 case GL_LUMINANCE_INTEGER_EXT:
3303 set_swizzle(swizzle, 0, 0, 0, 5);
3304 return true;
3305 case GL_INTENSITY:
3306 set_swizzle(swizzle, 0, 0, 0, 0);
3307 return true;
3308 default:
3309 return false;
3310 }
3311 }
3312
3313 /**
3314 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3315 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3316 * otherwise (for non-array formats).
3317 *
3318 * This function will typically be used to compute a mesa format from a GL type
3319 * so we can then call _mesa_format_convert. This function does
3320 * not consider byte swapping, so it returns types assuming that no byte
3321 * swapping is involved. If byte swapping is involved then clients are supposed
3322 * to handle that on their side before calling _mesa_format_convert.
3323 *
3324 * This function returns an uint32_t that can pack a mesa_format or a
3325 * mesa_array_format. Clients must check the mesa array format bit
3326 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3327 * format is a mesa_array_format or a mesa_format.
3328 */
3329 uint32_t
3330 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3331 {
3332 bool is_array_format = true;
3333 uint8_t swizzle[4];
3334 bool normalized = false, is_float = false, is_signed = false;
3335 int num_channels = 0, type_size = 0;
3336
3337 /* Extract array format type information from the OpenGL data type */
3338 switch (type) {
3339 case GL_UNSIGNED_BYTE:
3340 type_size = 1;
3341 break;
3342 case GL_BYTE:
3343 type_size = 1;
3344 is_signed = true;
3345 break;
3346 case GL_UNSIGNED_SHORT:
3347 type_size = 2;
3348 break;
3349 case GL_SHORT:
3350 type_size = 2;
3351 is_signed = true;
3352 break;
3353 case GL_UNSIGNED_INT:
3354 type_size = 4;
3355 break;
3356 case GL_INT:
3357 type_size = 4;
3358 is_signed = true;
3359 break;
3360 case GL_HALF_FLOAT:
3361 case GL_HALF_FLOAT_OES:
3362 type_size = 2;
3363 is_signed = true;
3364 is_float = true;
3365 break;
3366 case GL_FLOAT:
3367 type_size = 4;
3368 is_signed = true;
3369 is_float = true;
3370 break;
3371 default:
3372 is_array_format = false;
3373 break;
3374 }
3375
3376 /* Extract array format swizzle information from the OpenGL format */
3377 if (is_array_format)
3378 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3379
3380 /* If this is an array format type after checking data type and format,
3381 * create the array format
3382 */
3383 if (is_array_format) {
3384 normalized = !_mesa_is_enum_format_integer(format);
3385 num_channels = _mesa_components_in_format(format);
3386
3387 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
3388 normalized, num_channels,
3389 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3390 }
3391
3392 /* Otherwise this is not an array format, so return the mesa_format
3393 * matching the OpenGL format and data type
3394 */
3395 switch (type) {
3396 case GL_UNSIGNED_SHORT_5_6_5:
3397 if (format == GL_RGB)
3398 return MESA_FORMAT_B5G6R5_UNORM;
3399 else if (format == GL_BGR)
3400 return MESA_FORMAT_R5G6B5_UNORM;
3401 else if (format == GL_RGB_INTEGER)
3402 return MESA_FORMAT_B5G6R5_UINT;
3403 break;
3404 case GL_UNSIGNED_SHORT_5_6_5_REV:
3405 if (format == GL_RGB)
3406 return MESA_FORMAT_R5G6B5_UNORM;
3407 else if (format == GL_BGR)
3408 return MESA_FORMAT_B5G6R5_UNORM;
3409 else if (format == GL_RGB_INTEGER)
3410 return MESA_FORMAT_R5G6B5_UINT;
3411 break;
3412 case GL_UNSIGNED_SHORT_4_4_4_4:
3413 if (format == GL_RGBA)
3414 return MESA_FORMAT_A4B4G4R4_UNORM;
3415 else if (format == GL_BGRA)
3416 return MESA_FORMAT_A4R4G4B4_UNORM;
3417 else if (format == GL_ABGR_EXT)
3418 return MESA_FORMAT_R4G4B4A4_UNORM;
3419 else if (format == GL_RGBA_INTEGER)
3420 return MESA_FORMAT_A4B4G4R4_UINT;
3421 else if (format == GL_BGRA_INTEGER)
3422 return MESA_FORMAT_A4R4G4B4_UINT;
3423 break;
3424 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3425 if (format == GL_RGBA)
3426 return MESA_FORMAT_R4G4B4A4_UNORM;
3427 else if (format == GL_BGRA)
3428 return MESA_FORMAT_B4G4R4A4_UNORM;
3429 else if (format == GL_ABGR_EXT)
3430 return MESA_FORMAT_A4B4G4R4_UNORM;
3431 else if (format == GL_RGBA_INTEGER)
3432 return MESA_FORMAT_R4G4B4A4_UINT;
3433 else if (format == GL_BGRA_INTEGER)
3434 return MESA_FORMAT_B4G4R4A4_UINT;
3435 break;
3436 case GL_UNSIGNED_SHORT_5_5_5_1:
3437 if (format == GL_RGBA)
3438 return MESA_FORMAT_A1B5G5R5_UNORM;
3439 else if (format == GL_BGRA)
3440 return MESA_FORMAT_A1R5G5B5_UNORM;
3441 else if (format == GL_RGBA_INTEGER)
3442 return MESA_FORMAT_A1B5G5R5_UINT;
3443 else if (format == GL_BGRA_INTEGER)
3444 return MESA_FORMAT_A1R5G5B5_UINT;
3445 break;
3446 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3447 if (format == GL_RGBA)
3448 return MESA_FORMAT_R5G5B5A1_UNORM;
3449 else if (format == GL_BGRA)
3450 return MESA_FORMAT_B5G5R5A1_UNORM;
3451 else if (format == GL_RGBA_INTEGER)
3452 return MESA_FORMAT_R5G5B5A1_UINT;
3453 else if (format == GL_BGRA_INTEGER)
3454 return MESA_FORMAT_B5G5R5A1_UINT;
3455 break;
3456 case GL_UNSIGNED_BYTE_3_3_2:
3457 if (format == GL_RGB)
3458 return MESA_FORMAT_B2G3R3_UNORM;
3459 else if (format == GL_RGB_INTEGER)
3460 return MESA_FORMAT_B2G3R3_UINT;
3461 break;
3462 case GL_UNSIGNED_BYTE_2_3_3_REV:
3463 if (format == GL_RGB)
3464 return MESA_FORMAT_R3G3B2_UNORM;
3465 else if (format == GL_RGB_INTEGER)
3466 return MESA_FORMAT_R3G3B2_UINT;
3467 break;
3468 case GL_UNSIGNED_INT_5_9_9_9_REV:
3469 if (format == GL_RGB)
3470 return MESA_FORMAT_R9G9B9E5_FLOAT;
3471 break;
3472 case GL_UNSIGNED_INT_10_10_10_2:
3473 if (format == GL_RGBA)
3474 return MESA_FORMAT_A2B10G10R10_UNORM;
3475 else if (format == GL_RGBA_INTEGER)
3476 return MESA_FORMAT_A2B10G10R10_UINT;
3477 else if (format == GL_BGRA)
3478 return MESA_FORMAT_A2R10G10B10_UNORM;
3479 else if (format == GL_BGRA_INTEGER)
3480 return MESA_FORMAT_A2R10G10B10_UINT;
3481 break;
3482 case GL_UNSIGNED_INT_2_10_10_10_REV:
3483 if (format == GL_RGB)
3484 return MESA_FORMAT_R10G10B10X2_UNORM;
3485 if (format == GL_RGBA)
3486 return MESA_FORMAT_R10G10B10A2_UNORM;
3487 else if (format == GL_RGBA_INTEGER)
3488 return MESA_FORMAT_R10G10B10A2_UINT;
3489 else if (format == GL_BGRA)
3490 return MESA_FORMAT_B10G10R10A2_UNORM;
3491 else if (format == GL_BGRA_INTEGER)
3492 return MESA_FORMAT_B10G10R10A2_UINT;
3493 break;
3494 case GL_UNSIGNED_INT_8_8_8_8:
3495 if (format == GL_RGBA)
3496 return MESA_FORMAT_A8B8G8R8_UNORM;
3497 else if (format == GL_BGRA)
3498 return MESA_FORMAT_A8R8G8B8_UNORM;
3499 else if (format == GL_ABGR_EXT)
3500 return MESA_FORMAT_R8G8B8A8_UNORM;
3501 else if (format == GL_RGBA_INTEGER)
3502 return MESA_FORMAT_A8B8G8R8_UINT;
3503 else if (format == GL_BGRA_INTEGER)
3504 return MESA_FORMAT_A8R8G8B8_UINT;
3505 break;
3506 case GL_UNSIGNED_INT_8_8_8_8_REV:
3507 if (format == GL_RGBA)
3508 return MESA_FORMAT_R8G8B8A8_UNORM;
3509 else if (format == GL_BGRA)
3510 return MESA_FORMAT_B8G8R8A8_UNORM;
3511 else if (format == GL_ABGR_EXT)
3512 return MESA_FORMAT_A8B8G8R8_UNORM;
3513 else if (format == GL_RGBA_INTEGER)
3514 return MESA_FORMAT_R8G8B8A8_UINT;
3515 else if (format == GL_BGRA_INTEGER)
3516 return MESA_FORMAT_B8G8R8A8_UINT;
3517 break;
3518 case GL_UNSIGNED_SHORT_8_8_MESA:
3519 if (format == GL_YCBCR_MESA)
3520 return MESA_FORMAT_YCBCR;
3521 break;
3522 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3523 if (format == GL_YCBCR_MESA)
3524 return MESA_FORMAT_YCBCR_REV;
3525 break;
3526 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3527 if (format == GL_RGB)
3528 return MESA_FORMAT_R11G11B10_FLOAT;
3529 break;
3530 case GL_FLOAT:
3531 if (format == GL_DEPTH_COMPONENT)
3532 return MESA_FORMAT_Z_FLOAT32;
3533 break;
3534 case GL_UNSIGNED_INT:
3535 if (format == GL_DEPTH_COMPONENT)
3536 return MESA_FORMAT_Z_UNORM32;
3537 break;
3538 case GL_UNSIGNED_SHORT:
3539 if (format == GL_DEPTH_COMPONENT)
3540 return MESA_FORMAT_Z_UNORM16;
3541 break;
3542 case GL_UNSIGNED_INT_24_8:
3543 if (format == GL_DEPTH_STENCIL)
3544 return MESA_FORMAT_Z24_UNORM_S8_UINT;
3545 break;
3546 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3547 if (format == GL_DEPTH_STENCIL)
3548 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3549 break;
3550 default:
3551 break;
3552 }
3553
3554 /* If we got here it means that we could not find a Mesa format that
3555 * matches the GL format/type provided. We may need to add a new Mesa
3556 * format in that case.
3557 */
3558 unreachable("Unsupported format");
3559 }
3560
3561 /**
3562 * Returns true if \p internal_format is a sized internal format that
3563 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
3564 */
3565 bool
3566 _mesa_is_es3_color_renderable(GLenum internal_format)
3567 {
3568 switch (internal_format) {
3569 case GL_R8:
3570 case GL_RG8:
3571 case GL_RGB8:
3572 case GL_RGB565:
3573 case GL_RGBA4:
3574 case GL_RGB5_A1:
3575 case GL_RGBA8:
3576 case GL_RGB10_A2:
3577 case GL_RGB10_A2UI:
3578 case GL_SRGB8_ALPHA8:
3579 case GL_R16F:
3580 case GL_RG16F:
3581 case GL_RGBA16F:
3582 case GL_R32F:
3583 case GL_RG32F:
3584 case GL_RGBA32F:
3585 case GL_R11F_G11F_B10F:
3586 case GL_R8I:
3587 case GL_R8UI:
3588 case GL_R16I:
3589 case GL_R16UI:
3590 case GL_R32I:
3591 case GL_R32UI:
3592 case GL_RG8I:
3593 case GL_RG8UI:
3594 case GL_RG16I:
3595 case GL_RG16UI:
3596 case GL_RG32I:
3597 case GL_RG32UI:
3598 case GL_RGBA8I:
3599 case GL_RGBA8UI:
3600 case GL_RGBA16I:
3601 case GL_RGBA16UI:
3602 case GL_RGBA32I:
3603 case GL_RGBA32UI:
3604 return true;
3605 default:
3606 return false;
3607 }
3608 }
3609
3610 /**
3611 * Returns true if \p internal_format is a sized internal format that
3612 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
3613 */
3614 bool
3615 _mesa_is_es3_texture_filterable(GLenum internal_format)
3616 {
3617 switch (internal_format) {
3618 case GL_R8:
3619 case GL_R8_SNORM:
3620 case GL_RG8:
3621 case GL_RG8_SNORM:
3622 case GL_RGB8:
3623 case GL_RGB8_SNORM:
3624 case GL_RGB565:
3625 case GL_RGBA4:
3626 case GL_RGB5_A1:
3627 case GL_RGBA8:
3628 case GL_RGBA8_SNORM:
3629 case GL_RGB10_A2:
3630 case GL_SRGB8:
3631 case GL_SRGB8_ALPHA8:
3632 case GL_R16F:
3633 case GL_RG16F:
3634 case GL_RGB16F:
3635 case GL_RGBA16F:
3636 case GL_R11F_G11F_B10F:
3637 case GL_RGB9_E5:
3638 return true;
3639 default:
3640 return false;
3641 }
3642 }