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448577e059fa922b1deb4faeb3731930edb1077a
[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 2D format.
827 */
828 static bool
829 is_astc_2d_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 * Test if the given format is an ASTC 3D format.
868 */
869 static bool
870 is_astc_3d_format(GLenum internalFormat)
871 {
872 switch (internalFormat) {
873 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
874 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
875 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
876 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
877 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
878 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
879 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
880 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
881 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
882 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
883 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
884 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
885 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
886 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
887 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
888 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
889 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
890 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
891 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
892 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
893 return true;
894 default:
895 return false;
896 }
897 }
898
899 /**
900 * Test if the given format is an ASTC format.
901 */
902 GLboolean
903 _mesa_is_astc_format(GLenum internalFormat)
904 {
905 return is_astc_2d_format(internalFormat) ||
906 is_astc_3d_format(internalFormat);
907 }
908
909 /**
910 * Test if the given format is an integer (non-normalized) format.
911 */
912 GLboolean
913 _mesa_is_enum_format_integer(GLenum format)
914 {
915 return _mesa_is_enum_format_unsigned_int(format) ||
916 _mesa_is_enum_format_signed_int(format);
917 }
918
919
920 GLboolean
921 _mesa_is_type_unsigned(GLenum type)
922 {
923 switch (type) {
924 case GL_UNSIGNED_INT:
925 case GL_UNSIGNED_INT_8_8_8_8:
926 case GL_UNSIGNED_INT_8_8_8_8_REV:
927 case GL_UNSIGNED_INT_10_10_10_2:
928 case GL_UNSIGNED_INT_2_10_10_10_REV:
929
930 case GL_UNSIGNED_SHORT:
931 case GL_UNSIGNED_SHORT_4_4_4_4:
932 case GL_UNSIGNED_SHORT_5_5_5_1:
933 case GL_UNSIGNED_SHORT_5_6_5:
934 case GL_UNSIGNED_SHORT_5_6_5_REV:
935 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
936 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
937 case GL_UNSIGNED_SHORT_8_8_MESA:
938 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
939
940 case GL_UNSIGNED_BYTE:
941 case GL_UNSIGNED_BYTE_3_3_2:
942 case GL_UNSIGNED_BYTE_2_3_3_REV:
943 return GL_TRUE;
944
945 default:
946 return GL_FALSE;
947 }
948 }
949
950
951 /**
952 * Test if the given image format is a color/RGBA format (i.e., not color
953 * index, depth, stencil, etc).
954 * \param format the image format value (may by an internal texture format)
955 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
956 */
957 GLboolean
958 _mesa_is_color_format(GLenum format)
959 {
960 switch (format) {
961 case GL_RED:
962 case GL_GREEN:
963 case GL_BLUE:
964 case GL_ALPHA:
965 case GL_ALPHA4:
966 case GL_ALPHA8:
967 case GL_ALPHA12:
968 case GL_ALPHA16:
969 case 1:
970 case GL_LUMINANCE:
971 case GL_LUMINANCE4:
972 case GL_LUMINANCE8:
973 case GL_LUMINANCE12:
974 case GL_LUMINANCE16:
975 case 2:
976 case GL_LUMINANCE_ALPHA:
977 case GL_LUMINANCE4_ALPHA4:
978 case GL_LUMINANCE6_ALPHA2:
979 case GL_LUMINANCE8_ALPHA8:
980 case GL_LUMINANCE12_ALPHA4:
981 case GL_LUMINANCE12_ALPHA12:
982 case GL_LUMINANCE16_ALPHA16:
983 case GL_INTENSITY:
984 case GL_INTENSITY4:
985 case GL_INTENSITY8:
986 case GL_INTENSITY12:
987 case GL_INTENSITY16:
988 case GL_R8:
989 case GL_R16:
990 case GL_RG:
991 case GL_RG8:
992 case GL_RG16:
993 case 3:
994 case GL_RGB:
995 case GL_BGR:
996 case GL_R3_G3_B2:
997 case GL_RGB4:
998 case GL_RGB5:
999 case GL_RGB565:
1000 case GL_RGB8:
1001 case GL_RGB10:
1002 case GL_RGB12:
1003 case GL_RGB16:
1004 case 4:
1005 case GL_ABGR_EXT:
1006 case GL_RGBA:
1007 case GL_BGRA:
1008 case GL_RGBA2:
1009 case GL_RGBA4:
1010 case GL_RGB5_A1:
1011 case GL_RGBA8:
1012 case GL_RGB10_A2:
1013 case GL_RGBA12:
1014 case GL_RGBA16:
1015 /* float texture formats */
1016 case GL_ALPHA16F_ARB:
1017 case GL_ALPHA32F_ARB:
1018 case GL_LUMINANCE16F_ARB:
1019 case GL_LUMINANCE32F_ARB:
1020 case GL_LUMINANCE_ALPHA16F_ARB:
1021 case GL_LUMINANCE_ALPHA32F_ARB:
1022 case GL_INTENSITY16F_ARB:
1023 case GL_INTENSITY32F_ARB:
1024 case GL_R16F:
1025 case GL_R32F:
1026 case GL_RG16F:
1027 case GL_RG32F:
1028 case GL_RGB16F_ARB:
1029 case GL_RGB32F_ARB:
1030 case GL_RGBA16F_ARB:
1031 case GL_RGBA32F_ARB:
1032 /* compressed formats */
1033 case GL_COMPRESSED_ALPHA:
1034 case GL_COMPRESSED_LUMINANCE:
1035 case GL_COMPRESSED_LUMINANCE_ALPHA:
1036 case GL_COMPRESSED_INTENSITY:
1037 case GL_COMPRESSED_RED:
1038 case GL_COMPRESSED_RG:
1039 case GL_COMPRESSED_RGB:
1040 case GL_COMPRESSED_RGBA:
1041 case GL_RGB_S3TC:
1042 case GL_RGB4_S3TC:
1043 case GL_RGBA_S3TC:
1044 case GL_RGBA4_S3TC:
1045 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1046 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1047 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1048 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1049 case GL_COMPRESSED_RGB_FXT1_3DFX:
1050 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1051 case GL_SRGB_EXT:
1052 case GL_SRGB8_EXT:
1053 case GL_SRGB_ALPHA_EXT:
1054 case GL_SRGB8_ALPHA8_EXT:
1055 case GL_SLUMINANCE_ALPHA_EXT:
1056 case GL_SLUMINANCE8_ALPHA8_EXT:
1057 case GL_SLUMINANCE_EXT:
1058 case GL_SLUMINANCE8_EXT:
1059 case GL_COMPRESSED_SRGB_EXT:
1060 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1061 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1062 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1063 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1064 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1065 case GL_COMPRESSED_SLUMINANCE_EXT:
1066 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1067 case GL_COMPRESSED_RED_RGTC1:
1068 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1069 case GL_COMPRESSED_RG_RGTC2:
1070 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1071 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1072 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1073 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1074 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1075 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1076 case GL_ETC1_RGB8_OES:
1077 case GL_COMPRESSED_RGB8_ETC2:
1078 case GL_COMPRESSED_SRGB8_ETC2:
1079 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1080 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1081 case GL_COMPRESSED_R11_EAC:
1082 case GL_COMPRESSED_RG11_EAC:
1083 case GL_COMPRESSED_SIGNED_R11_EAC:
1084 case GL_COMPRESSED_SIGNED_RG11_EAC:
1085 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1086 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1087 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1088 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1089 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1090 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1091 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1092 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1093 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1094 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1095 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1096 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1097 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1098 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1099 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1100 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1101 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1102 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1103 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1104 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1105 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1106 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1107 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1108 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1109 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1110 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1111 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1112 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1113 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1114 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1115 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1116 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1117 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1118 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1119 /* generic integer formats */
1120 case GL_RED_INTEGER_EXT:
1121 case GL_GREEN_INTEGER_EXT:
1122 case GL_BLUE_INTEGER_EXT:
1123 case GL_ALPHA_INTEGER_EXT:
1124 case GL_RGB_INTEGER_EXT:
1125 case GL_RGBA_INTEGER_EXT:
1126 case GL_BGR_INTEGER_EXT:
1127 case GL_BGRA_INTEGER_EXT:
1128 case GL_RG_INTEGER:
1129 case GL_LUMINANCE_INTEGER_EXT:
1130 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1131 /* sized integer formats */
1132 case GL_RGBA32UI_EXT:
1133 case GL_RGB32UI_EXT:
1134 case GL_RG32UI:
1135 case GL_R32UI:
1136 case GL_ALPHA32UI_EXT:
1137 case GL_INTENSITY32UI_EXT:
1138 case GL_LUMINANCE32UI_EXT:
1139 case GL_LUMINANCE_ALPHA32UI_EXT:
1140 case GL_RGBA16UI_EXT:
1141 case GL_RGB16UI_EXT:
1142 case GL_RG16UI:
1143 case GL_R16UI:
1144 case GL_ALPHA16UI_EXT:
1145 case GL_INTENSITY16UI_EXT:
1146 case GL_LUMINANCE16UI_EXT:
1147 case GL_LUMINANCE_ALPHA16UI_EXT:
1148 case GL_RGBA8UI_EXT:
1149 case GL_RGB8UI_EXT:
1150 case GL_RG8UI:
1151 case GL_R8UI:
1152 case GL_ALPHA8UI_EXT:
1153 case GL_INTENSITY8UI_EXT:
1154 case GL_LUMINANCE8UI_EXT:
1155 case GL_LUMINANCE_ALPHA8UI_EXT:
1156 case GL_RGBA32I_EXT:
1157 case GL_RGB32I_EXT:
1158 case GL_RG32I:
1159 case GL_R32I:
1160 case GL_ALPHA32I_EXT:
1161 case GL_INTENSITY32I_EXT:
1162 case GL_LUMINANCE32I_EXT:
1163 case GL_LUMINANCE_ALPHA32I_EXT:
1164 case GL_RGBA16I_EXT:
1165 case GL_RGB16I_EXT:
1166 case GL_RG16I:
1167 case GL_R16I:
1168 case GL_ALPHA16I_EXT:
1169 case GL_INTENSITY16I_EXT:
1170 case GL_LUMINANCE16I_EXT:
1171 case GL_LUMINANCE_ALPHA16I_EXT:
1172 case GL_RGBA8I_EXT:
1173 case GL_RGB8I_EXT:
1174 case GL_RG8I:
1175 case GL_R8I:
1176 case GL_ALPHA8I_EXT:
1177 case GL_INTENSITY8I_EXT:
1178 case GL_LUMINANCE8I_EXT:
1179 case GL_LUMINANCE_ALPHA8I_EXT:
1180 /* signed, normalized texture formats */
1181 case GL_RED_SNORM:
1182 case GL_R8_SNORM:
1183 case GL_R16_SNORM:
1184 case GL_RG_SNORM:
1185 case GL_RG8_SNORM:
1186 case GL_RG16_SNORM:
1187 case GL_RGB_SNORM:
1188 case GL_RGB8_SNORM:
1189 case GL_RGB16_SNORM:
1190 case GL_RGBA_SNORM:
1191 case GL_RGBA8_SNORM:
1192 case GL_RGBA16_SNORM:
1193 case GL_ALPHA_SNORM:
1194 case GL_ALPHA8_SNORM:
1195 case GL_ALPHA16_SNORM:
1196 case GL_LUMINANCE_SNORM:
1197 case GL_LUMINANCE8_SNORM:
1198 case GL_LUMINANCE16_SNORM:
1199 case GL_LUMINANCE_ALPHA_SNORM:
1200 case GL_LUMINANCE8_ALPHA8_SNORM:
1201 case GL_LUMINANCE16_ALPHA16_SNORM:
1202 case GL_INTENSITY_SNORM:
1203 case GL_INTENSITY8_SNORM:
1204 case GL_INTENSITY16_SNORM:
1205 case GL_RGB9_E5:
1206 case GL_R11F_G11F_B10F:
1207 case GL_RGB10_A2UI:
1208 return GL_TRUE;
1209 case GL_YCBCR_MESA: /* not considered to be RGB */
1210 /* fall-through */
1211 default:
1212 return GL_FALSE;
1213 }
1214 }
1215
1216
1217 /**
1218 * Test if the given image format is a depth component format.
1219 */
1220 GLboolean
1221 _mesa_is_depth_format(GLenum format)
1222 {
1223 switch (format) {
1224 case GL_DEPTH_COMPONENT:
1225 case GL_DEPTH_COMPONENT16:
1226 case GL_DEPTH_COMPONENT24:
1227 case GL_DEPTH_COMPONENT32:
1228 case GL_DEPTH_COMPONENT32F:
1229 return GL_TRUE;
1230 default:
1231 return GL_FALSE;
1232 }
1233 }
1234
1235
1236 /**
1237 * Test if the given image format is a stencil format.
1238 */
1239 GLboolean
1240 _mesa_is_stencil_format(GLenum format)
1241 {
1242 switch (format) {
1243 case GL_STENCIL_INDEX:
1244 return GL_TRUE;
1245 default:
1246 return GL_FALSE;
1247 }
1248 }
1249
1250
1251 /**
1252 * Test if the given image format is a YCbCr format.
1253 */
1254 GLboolean
1255 _mesa_is_ycbcr_format(GLenum format)
1256 {
1257 switch (format) {
1258 case GL_YCBCR_MESA:
1259 return GL_TRUE;
1260 default:
1261 return GL_FALSE;
1262 }
1263 }
1264
1265
1266 /**
1267 * Test if the given image format is a depth+stencil format.
1268 */
1269 GLboolean
1270 _mesa_is_depthstencil_format(GLenum format)
1271 {
1272 switch (format) {
1273 case GL_DEPTH24_STENCIL8_EXT:
1274 case GL_DEPTH_STENCIL_EXT:
1275 case GL_DEPTH32F_STENCIL8:
1276 return GL_TRUE;
1277 default:
1278 return GL_FALSE;
1279 }
1280 }
1281
1282
1283 /**
1284 * Test if the given image format is a depth or stencil format.
1285 */
1286 GLboolean
1287 _mesa_is_depth_or_stencil_format(GLenum format)
1288 {
1289 switch (format) {
1290 case GL_DEPTH_COMPONENT:
1291 case GL_DEPTH_COMPONENT16:
1292 case GL_DEPTH_COMPONENT24:
1293 case GL_DEPTH_COMPONENT32:
1294 case GL_STENCIL_INDEX:
1295 case GL_STENCIL_INDEX1_EXT:
1296 case GL_STENCIL_INDEX4_EXT:
1297 case GL_STENCIL_INDEX8_EXT:
1298 case GL_STENCIL_INDEX16_EXT:
1299 case GL_DEPTH_STENCIL_EXT:
1300 case GL_DEPTH24_STENCIL8_EXT:
1301 case GL_DEPTH_COMPONENT32F:
1302 case GL_DEPTH32F_STENCIL8:
1303 return GL_TRUE;
1304 default:
1305 return GL_FALSE;
1306 }
1307 }
1308
1309
1310 /**
1311 * Test if an image format is a supported compressed format.
1312 * \param format the internal format token provided by the user.
1313 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1314 */
1315 GLboolean
1316 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1317 {
1318 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1319
1320 /* Some formats in this switch have an equivalent mesa_format_layout
1321 * to the compressed formats in the layout switch below and thus
1322 * must be handled first.
1323 */
1324 switch (format) {
1325 case GL_RGB_S3TC:
1326 case GL_RGB4_S3TC:
1327 case GL_RGBA_S3TC:
1328 case GL_RGBA4_S3TC:
1329 return _mesa_is_desktop_gl(ctx) &&
1330 ctx->Extensions.ANGLE_texture_compression_dxt;
1331 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1332 return ctx->API == API_OPENGL_COMPAT
1333 && ctx->Extensions.ATI_texture_compression_3dc;
1334 case GL_PALETTE4_RGB8_OES:
1335 case GL_PALETTE4_RGBA8_OES:
1336 case GL_PALETTE4_R5_G6_B5_OES:
1337 case GL_PALETTE4_RGBA4_OES:
1338 case GL_PALETTE4_RGB5_A1_OES:
1339 case GL_PALETTE8_RGB8_OES:
1340 case GL_PALETTE8_RGBA8_OES:
1341 case GL_PALETTE8_R5_G6_B5_OES:
1342 case GL_PALETTE8_RGBA4_OES:
1343 case GL_PALETTE8_RGB5_A1_OES:
1344 return ctx->API == API_OPENGLES;
1345 }
1346
1347 switch (_mesa_get_format_layout(m_format)) {
1348 case MESA_FORMAT_LAYOUT_S3TC:
1349 if (_mesa_get_format_color_encoding(m_format) == GL_LINEAR) {
1350 /* Assume that the ANGLE flag will always be set if the
1351 * EXT flag is set.
1352 */
1353 return ctx->Extensions.ANGLE_texture_compression_dxt;
1354 } else {
1355 return _mesa_is_desktop_gl(ctx)
1356 && ctx->Extensions.EXT_texture_sRGB
1357 && ctx->Extensions.EXT_texture_compression_s3tc;
1358 }
1359 case MESA_FORMAT_LAYOUT_FXT1:
1360 return _mesa_is_desktop_gl(ctx)
1361 && ctx->Extensions.TDFX_texture_compression_FXT1;
1362 case MESA_FORMAT_LAYOUT_RGTC:
1363 return _mesa_is_desktop_gl(ctx)
1364 && ctx->Extensions.ARB_texture_compression_rgtc;
1365 case MESA_FORMAT_LAYOUT_LATC:
1366 return ctx->API == API_OPENGL_COMPAT
1367 && ctx->Extensions.EXT_texture_compression_latc;
1368 case MESA_FORMAT_LAYOUT_ETC1:
1369 return _mesa_is_gles(ctx)
1370 && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
1371 case MESA_FORMAT_LAYOUT_ETC2:
1372 return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
1373 case MESA_FORMAT_LAYOUT_BPTC:
1374 return _mesa_is_desktop_gl(ctx) &&
1375 ctx->Extensions.ARB_texture_compression_bptc;
1376 case MESA_FORMAT_LAYOUT_ASTC:
1377 return ctx->Extensions.KHR_texture_compression_astc_ldr;
1378 default:
1379 return GL_FALSE;
1380 }
1381 }
1382
1383 /**
1384 * Test if the given format represents an sRGB format.
1385 * \param format the GL format (can be an internal format)
1386 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1387 */
1388 GLboolean
1389 _mesa_is_srgb_format(GLenum format)
1390 {
1391 switch (format) {
1392 case GL_SRGB:
1393 case GL_SRGB8:
1394 case GL_SRGB_ALPHA:
1395 case GL_SRGB8_ALPHA8:
1396 case GL_COMPRESSED_SRGB:
1397 case GL_COMPRESSED_SRGB_ALPHA:
1398 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1399 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1400 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1401 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1402 case GL_COMPRESSED_SRGB8_ETC2:
1403 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1404 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1405 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1406 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1407 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1408 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1409 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1410 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1411 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1412 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1413 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1414 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1415 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1416 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1417 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1418 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1419 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1420 return GL_TRUE;
1421 default:
1422 break;
1423 }
1424
1425 return GL_FALSE;
1426 }
1427
1428 /**
1429 * Convert various unpack formats to the corresponding base format.
1430 */
1431 GLenum
1432 _mesa_unpack_format_to_base_format(GLenum format)
1433 {
1434 switch(format) {
1435 case GL_RED_INTEGER:
1436 return GL_RED;
1437 case GL_GREEN_INTEGER:
1438 return GL_GREEN;
1439 case GL_BLUE_INTEGER:
1440 return GL_BLUE;
1441 case GL_ALPHA_INTEGER:
1442 return GL_ALPHA;
1443 case GL_RG_INTEGER:
1444 return GL_RG;
1445 case GL_RGB_INTEGER:
1446 return GL_RGB;
1447 case GL_RGBA_INTEGER:
1448 return GL_RGBA;
1449 case GL_BGR_INTEGER:
1450 return GL_BGR;
1451 case GL_BGRA_INTEGER:
1452 return GL_BGRA;
1453 case GL_LUMINANCE_INTEGER_EXT:
1454 return GL_LUMINANCE;
1455 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1456 return GL_LUMINANCE_ALPHA;
1457 case GL_RED:
1458 case GL_GREEN:
1459 case GL_BLUE:
1460 case GL_RG:
1461 case GL_RGB:
1462 case GL_RGBA:
1463 case GL_BGR:
1464 case GL_BGRA:
1465 case GL_ALPHA:
1466 case GL_LUMINANCE:
1467 case GL_LUMINANCE_ALPHA:
1468 default:
1469 return format;
1470 }
1471 }
1472
1473 /**
1474 * Convert various base formats to the corresponding integer format.
1475 */
1476 GLenum
1477 _mesa_base_format_to_integer_format(GLenum format)
1478 {
1479 switch(format) {
1480 case GL_RED:
1481 return GL_RED_INTEGER;
1482 case GL_GREEN:
1483 return GL_GREEN_INTEGER;
1484 case GL_BLUE:
1485 return GL_BLUE_INTEGER;
1486 case GL_RG:
1487 return GL_RG_INTEGER;
1488 case GL_RGB:
1489 return GL_RGB_INTEGER;
1490 case GL_RGBA:
1491 return GL_RGBA_INTEGER;
1492 case GL_BGR:
1493 return GL_BGR_INTEGER;
1494 case GL_BGRA:
1495 return GL_BGRA_INTEGER;
1496 case GL_ALPHA:
1497 return GL_ALPHA_INTEGER;
1498 case GL_LUMINANCE:
1499 return GL_LUMINANCE_INTEGER_EXT;
1500 case GL_LUMINANCE_ALPHA:
1501 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1502 }
1503
1504 return format;
1505 }
1506
1507
1508 /**
1509 * Does the given base texture/renderbuffer format have the channel
1510 * named by 'pname'?
1511 */
1512 GLboolean
1513 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1514 {
1515 switch (pname) {
1516 case GL_TEXTURE_RED_SIZE:
1517 case GL_TEXTURE_RED_TYPE:
1518 case GL_RENDERBUFFER_RED_SIZE_EXT:
1519 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1520 case GL_INTERNALFORMAT_RED_SIZE:
1521 case GL_INTERNALFORMAT_RED_TYPE:
1522 if (base_format == GL_RED ||
1523 base_format == GL_RG ||
1524 base_format == GL_RGB ||
1525 base_format == GL_RGBA) {
1526 return GL_TRUE;
1527 }
1528 return GL_FALSE;
1529 case GL_TEXTURE_GREEN_SIZE:
1530 case GL_TEXTURE_GREEN_TYPE:
1531 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1532 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1533 case GL_INTERNALFORMAT_GREEN_SIZE:
1534 case GL_INTERNALFORMAT_GREEN_TYPE:
1535 if (base_format == GL_RG ||
1536 base_format == GL_RGB ||
1537 base_format == GL_RGBA) {
1538 return GL_TRUE;
1539 }
1540 return GL_FALSE;
1541 case GL_TEXTURE_BLUE_SIZE:
1542 case GL_TEXTURE_BLUE_TYPE:
1543 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1544 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1545 case GL_INTERNALFORMAT_BLUE_SIZE:
1546 case GL_INTERNALFORMAT_BLUE_TYPE:
1547 if (base_format == GL_RGB ||
1548 base_format == GL_RGBA) {
1549 return GL_TRUE;
1550 }
1551 return GL_FALSE;
1552 case GL_TEXTURE_ALPHA_SIZE:
1553 case GL_TEXTURE_ALPHA_TYPE:
1554 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1555 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1556 case GL_INTERNALFORMAT_ALPHA_SIZE:
1557 case GL_INTERNALFORMAT_ALPHA_TYPE:
1558 if (base_format == GL_RGBA ||
1559 base_format == GL_ALPHA ||
1560 base_format == GL_LUMINANCE_ALPHA) {
1561 return GL_TRUE;
1562 }
1563 return GL_FALSE;
1564 case GL_TEXTURE_LUMINANCE_SIZE:
1565 case GL_TEXTURE_LUMINANCE_TYPE:
1566 if (base_format == GL_LUMINANCE ||
1567 base_format == GL_LUMINANCE_ALPHA) {
1568 return GL_TRUE;
1569 }
1570 return GL_FALSE;
1571 case GL_TEXTURE_INTENSITY_SIZE:
1572 case GL_TEXTURE_INTENSITY_TYPE:
1573 if (base_format == GL_INTENSITY) {
1574 return GL_TRUE;
1575 }
1576 return GL_FALSE;
1577 case GL_TEXTURE_DEPTH_SIZE:
1578 case GL_TEXTURE_DEPTH_TYPE:
1579 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1580 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1581 case GL_INTERNALFORMAT_DEPTH_SIZE:
1582 case GL_INTERNALFORMAT_DEPTH_TYPE:
1583 if (base_format == GL_DEPTH_STENCIL ||
1584 base_format == GL_DEPTH_COMPONENT) {
1585 return GL_TRUE;
1586 }
1587 return GL_FALSE;
1588 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1589 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1590 case GL_INTERNALFORMAT_STENCIL_SIZE:
1591 case GL_INTERNALFORMAT_STENCIL_TYPE:
1592 if (base_format == GL_DEPTH_STENCIL ||
1593 base_format == GL_STENCIL_INDEX) {
1594 return GL_TRUE;
1595 }
1596 return GL_FALSE;
1597 default:
1598 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1599 __func__, pname);
1600 return GL_FALSE;
1601 }
1602
1603 return GL_FALSE;
1604 }
1605
1606
1607 /**
1608 * Returns the number of channels/components for a base format.
1609 */
1610 GLint
1611 _mesa_base_format_component_count(GLenum base_format)
1612 {
1613 switch (base_format) {
1614 case GL_LUMINANCE:
1615 case GL_RED:
1616 case GL_ALPHA:
1617 case GL_INTENSITY:
1618 case GL_DEPTH_COMPONENT:
1619 return 1;
1620 case GL_RG:
1621 case GL_LUMINANCE_ALPHA:
1622 case GL_DEPTH_STENCIL:
1623 return 2;
1624 case GL_RGB:
1625 return 3;
1626 case GL_RGBA:
1627 return 4;
1628 default:
1629 return -1;
1630 }
1631 }
1632
1633
1634 /**
1635 * If format is a generic compressed format, return the corresponding
1636 * non-compressed format. For other formats, return the format as-is.
1637 */
1638 GLenum
1639 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1640 {
1641 switch (format) {
1642 case GL_COMPRESSED_RED:
1643 return GL_RED;
1644 case GL_COMPRESSED_RG:
1645 return GL_RG;
1646 case GL_COMPRESSED_RGB:
1647 return GL_RGB;
1648 case GL_COMPRESSED_RGBA:
1649 return GL_RGBA;
1650 case GL_COMPRESSED_ALPHA:
1651 return GL_ALPHA;
1652 case GL_COMPRESSED_LUMINANCE:
1653 return GL_LUMINANCE;
1654 case GL_COMPRESSED_LUMINANCE_ALPHA:
1655 return GL_LUMINANCE_ALPHA;
1656 case GL_COMPRESSED_INTENSITY:
1657 return GL_INTENSITY;
1658 /* sRGB formats */
1659 case GL_COMPRESSED_SRGB:
1660 return GL_SRGB;
1661 case GL_COMPRESSED_SRGB_ALPHA:
1662 return GL_SRGB_ALPHA;
1663 case GL_COMPRESSED_SLUMINANCE:
1664 return GL_SLUMINANCE;
1665 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1666 return GL_SLUMINANCE_ALPHA;
1667 default:
1668 return format;
1669 }
1670 }
1671
1672
1673 /**
1674 * Return the equivalent non-generic internal format.
1675 * This is useful for comparing whether two internal formats are equivalent.
1676 */
1677 GLenum
1678 _mesa_get_nongeneric_internalformat(GLenum format)
1679 {
1680 switch (format) {
1681 /* GL 1.1 formats. */
1682 case 4:
1683 case GL_RGBA:
1684 return GL_RGBA8;
1685 case 3:
1686 case GL_RGB:
1687 return GL_RGB8;
1688 case 2:
1689 case GL_LUMINANCE_ALPHA:
1690 return GL_LUMINANCE8_ALPHA8;
1691 case 1:
1692 case GL_LUMINANCE:
1693 return GL_LUMINANCE8;
1694 case GL_ALPHA:
1695 return GL_ALPHA8;
1696 case GL_INTENSITY:
1697 return GL_INTENSITY8;
1698
1699 /* GL_ARB_texture_rg */
1700 case GL_RED:
1701 return GL_R8;
1702 case GL_RG:
1703 return GL_RG8;
1704
1705 /* GL_EXT_texture_sRGB */
1706 case GL_SRGB:
1707 return GL_SRGB8;
1708 case GL_SRGB_ALPHA:
1709 return GL_SRGB8_ALPHA8;
1710 case GL_SLUMINANCE:
1711 return GL_SLUMINANCE8;
1712 case GL_SLUMINANCE_ALPHA:
1713 return GL_SLUMINANCE8_ALPHA8;
1714
1715 /* GL_EXT_texture_snorm */
1716 case GL_RGBA_SNORM:
1717 return GL_RGBA8_SNORM;
1718 case GL_RGB_SNORM:
1719 return GL_RGB8_SNORM;
1720 case GL_RG_SNORM:
1721 return GL_RG8_SNORM;
1722 case GL_RED_SNORM:
1723 return GL_R8_SNORM;
1724 case GL_LUMINANCE_ALPHA_SNORM:
1725 return GL_LUMINANCE8_ALPHA8_SNORM;
1726 case GL_LUMINANCE_SNORM:
1727 return GL_LUMINANCE8_SNORM;
1728 case GL_ALPHA_SNORM:
1729 return GL_ALPHA8_SNORM;
1730 case GL_INTENSITY_SNORM:
1731 return GL_INTENSITY8_SNORM;
1732
1733 default:
1734 return format;
1735 }
1736 }
1737
1738
1739 /**
1740 * Convert an sRGB internal format to linear.
1741 */
1742 GLenum
1743 _mesa_get_linear_internalformat(GLenum format)
1744 {
1745 switch (format) {
1746 case GL_SRGB:
1747 return GL_RGB;
1748 case GL_SRGB_ALPHA:
1749 return GL_RGBA;
1750 case GL_SRGB8:
1751 return GL_RGB8;
1752 case GL_SRGB8_ALPHA8:
1753 return GL_RGBA8;
1754 case GL_SLUMINANCE8:
1755 return GL_LUMINANCE8;
1756 case GL_SLUMINANCE:
1757 return GL_LUMINANCE;
1758 case GL_SLUMINANCE_ALPHA:
1759 return GL_LUMINANCE_ALPHA;
1760 case GL_SLUMINANCE8_ALPHA8:
1761 return GL_LUMINANCE8_ALPHA8;
1762 default:
1763 return format;
1764 }
1765 }
1766
1767
1768 /**
1769 * Do error checking of format/type combinations for glReadPixels,
1770 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1771 * and type values, we may either generate GL_INVALID_OPERATION or
1772 * GL_INVALID_ENUM.
1773 *
1774 * \param format pixel format.
1775 * \param type pixel type.
1776 *
1777 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1778 */
1779 GLenum
1780 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1781 GLenum format, GLenum type)
1782 {
1783 /* From OpenGL 3.3 spec, page 220:
1784 * "If the format is DEPTH_STENCIL, then values are taken from
1785 * both the depth buffer and the stencil buffer. If there is no
1786 * depth buffer or if there is no stencil buffer, then the error
1787 * INVALID_OPERATION occurs. If the type parameter is not
1788 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1789 * error INVALID_ENUM occurs."
1790 *
1791 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1792 * cannot be used to read depth or stencil in that API.
1793 */
1794 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1795 && type != GL_UNSIGNED_INT_24_8
1796 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1797 return GL_INVALID_ENUM;
1798
1799 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1800 switch (type) {
1801 case GL_BITMAP:
1802 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1803 return GL_INVALID_ENUM;
1804 }
1805 break;
1806
1807 case GL_UNSIGNED_BYTE_3_3_2:
1808 case GL_UNSIGNED_BYTE_2_3_3_REV:
1809 case GL_UNSIGNED_SHORT_5_6_5:
1810 case GL_UNSIGNED_SHORT_5_6_5_REV:
1811 if (format == GL_RGB) {
1812 break; /* OK */
1813 }
1814 if (format == GL_RGB_INTEGER_EXT &&
1815 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1816 break; /* OK */
1817 }
1818 return GL_INVALID_OPERATION;
1819
1820 case GL_UNSIGNED_SHORT_4_4_4_4:
1821 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1822 case GL_UNSIGNED_INT_8_8_8_8:
1823 case GL_UNSIGNED_INT_8_8_8_8_REV:
1824 if (format == GL_RGBA ||
1825 format == GL_BGRA ||
1826 format == GL_ABGR_EXT) {
1827 break; /* OK */
1828 }
1829 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1830 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1831 break; /* OK */
1832 }
1833 return GL_INVALID_OPERATION;
1834
1835 case GL_UNSIGNED_SHORT_5_5_5_1:
1836 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1837 case GL_UNSIGNED_INT_10_10_10_2:
1838 case GL_UNSIGNED_INT_2_10_10_10_REV:
1839 if (format == GL_RGBA ||
1840 format == GL_BGRA) {
1841 break; /* OK */
1842 }
1843 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1844 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1845 break; /* OK */
1846 }
1847 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1848 ctx->API == API_OPENGLES2) {
1849 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1850 }
1851 return GL_INVALID_OPERATION;
1852
1853 case GL_UNSIGNED_INT_24_8:
1854 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1855 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1856 return GL_NO_ERROR;
1857
1858 if (format != GL_DEPTH_STENCIL) {
1859 return GL_INVALID_OPERATION;
1860 }
1861 return GL_NO_ERROR;
1862
1863 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1864 if (!ctx->Extensions.ARB_depth_buffer_float) {
1865 return GL_INVALID_ENUM;
1866 }
1867 if (format != GL_DEPTH_STENCIL) {
1868 return GL_INVALID_OPERATION;
1869 }
1870 return GL_NO_ERROR;
1871
1872 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1873 if (!ctx->Extensions.EXT_packed_float) {
1874 return GL_INVALID_ENUM;
1875 }
1876 if (format != GL_RGB) {
1877 return GL_INVALID_OPERATION;
1878 }
1879 return GL_NO_ERROR;
1880
1881 case GL_HALF_FLOAT_OES:
1882 switch (format) {
1883 case GL_RGBA:
1884 case GL_RGB:
1885 case GL_LUMINANCE_ALPHA:
1886 case GL_LUMINANCE:
1887 case GL_ALPHA:
1888 return GL_NO_ERROR;
1889 case GL_RG:
1890 case GL_RED:
1891 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1892 return GL_NO_ERROR;
1893 default:
1894 return GL_INVALID_OPERATION;
1895 }
1896
1897 default:
1898 ; /* fall-through */
1899 }
1900
1901 /* now, for each format, check the type for compatibility */
1902 switch (format) {
1903 case GL_COLOR_INDEX:
1904 case GL_STENCIL_INDEX:
1905 switch (type) {
1906 case GL_BITMAP:
1907 case GL_BYTE:
1908 case GL_UNSIGNED_BYTE:
1909 case GL_SHORT:
1910 case GL_UNSIGNED_SHORT:
1911 case GL_INT:
1912 case GL_UNSIGNED_INT:
1913 case GL_FLOAT:
1914 case GL_HALF_FLOAT:
1915 return GL_NO_ERROR;
1916 default:
1917 return GL_INVALID_ENUM;
1918 }
1919
1920 case GL_RED:
1921 case GL_GREEN:
1922 case GL_BLUE:
1923 case GL_ALPHA:
1924 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1925 case GL_INTENSITY:
1926 #endif
1927 case GL_LUMINANCE:
1928 case GL_LUMINANCE_ALPHA:
1929 case GL_DEPTH_COMPONENT:
1930 switch (type) {
1931 case GL_BYTE:
1932 case GL_UNSIGNED_BYTE:
1933 case GL_SHORT:
1934 case GL_UNSIGNED_SHORT:
1935 case GL_INT:
1936 case GL_UNSIGNED_INT:
1937 case GL_FLOAT:
1938 case GL_HALF_FLOAT:
1939 return GL_NO_ERROR;
1940 default:
1941 return GL_INVALID_ENUM;
1942 }
1943
1944 case GL_RG:
1945 if (!ctx->Extensions.ARB_texture_rg)
1946 return GL_INVALID_ENUM;
1947 switch (type) {
1948 case GL_BYTE:
1949 case GL_UNSIGNED_BYTE:
1950 case GL_SHORT:
1951 case GL_UNSIGNED_SHORT:
1952 case GL_INT:
1953 case GL_UNSIGNED_INT:
1954 case GL_FLOAT:
1955 case GL_HALF_FLOAT:
1956 return GL_NO_ERROR;
1957 default:
1958 return GL_INVALID_ENUM;
1959 }
1960
1961 case GL_RGB:
1962 switch (type) {
1963 case GL_BYTE:
1964 case GL_UNSIGNED_BYTE:
1965 case GL_SHORT:
1966 case GL_UNSIGNED_SHORT:
1967 case GL_INT:
1968 case GL_UNSIGNED_INT:
1969 case GL_FLOAT:
1970 case GL_UNSIGNED_BYTE_3_3_2:
1971 case GL_UNSIGNED_BYTE_2_3_3_REV:
1972 case GL_UNSIGNED_SHORT_5_6_5:
1973 case GL_UNSIGNED_SHORT_5_6_5_REV:
1974 case GL_HALF_FLOAT:
1975 return GL_NO_ERROR;
1976 case GL_UNSIGNED_INT_2_10_10_10_REV:
1977 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1978 return (ctx->API == API_OPENGLES2)
1979 ? GL_NO_ERROR : GL_INVALID_ENUM;
1980 case GL_UNSIGNED_INT_5_9_9_9_REV:
1981 return ctx->Extensions.EXT_texture_shared_exponent
1982 ? GL_NO_ERROR : GL_INVALID_ENUM;
1983 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1984 return ctx->Extensions.EXT_packed_float
1985 ? GL_NO_ERROR : GL_INVALID_ENUM;
1986 default:
1987 return GL_INVALID_ENUM;
1988 }
1989
1990 case GL_BGR:
1991 switch (type) {
1992 /* NOTE: no packed types are supported with BGR. That's
1993 * intentional, according to the GL spec.
1994 */
1995 case GL_BYTE:
1996 case GL_UNSIGNED_BYTE:
1997 case GL_SHORT:
1998 case GL_UNSIGNED_SHORT:
1999 case GL_INT:
2000 case GL_UNSIGNED_INT:
2001 case GL_FLOAT:
2002 case GL_HALF_FLOAT:
2003 return GL_NO_ERROR;
2004 default:
2005 return GL_INVALID_ENUM;
2006 }
2007
2008 case GL_RGBA:
2009 case GL_BGRA:
2010 switch (type) {
2011 case GL_BYTE:
2012 case GL_UNSIGNED_BYTE:
2013 case GL_SHORT:
2014 case GL_UNSIGNED_SHORT:
2015 case GL_INT:
2016 case GL_UNSIGNED_INT:
2017 case GL_FLOAT:
2018 case GL_UNSIGNED_SHORT_4_4_4_4:
2019 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2020 case GL_UNSIGNED_SHORT_5_5_5_1:
2021 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2022 case GL_UNSIGNED_INT_8_8_8_8:
2023 case GL_UNSIGNED_INT_8_8_8_8_REV:
2024 case GL_UNSIGNED_INT_10_10_10_2:
2025 case GL_UNSIGNED_INT_2_10_10_10_REV:
2026 case GL_HALF_FLOAT:
2027 return GL_NO_ERROR;
2028 default:
2029 return GL_INVALID_ENUM;
2030 }
2031
2032 case GL_ABGR_EXT:
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 case GL_FLOAT:
2041 case GL_UNSIGNED_SHORT_4_4_4_4:
2042 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2043 case GL_UNSIGNED_INT_8_8_8_8:
2044 case GL_UNSIGNED_INT_8_8_8_8_REV:
2045 case GL_HALF_FLOAT:
2046 return GL_NO_ERROR;
2047 default:
2048 return GL_INVALID_ENUM;
2049 }
2050
2051 case GL_YCBCR_MESA:
2052 if (!ctx->Extensions.MESA_ycbcr_texture)
2053 return GL_INVALID_ENUM;
2054 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2055 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2056 return GL_NO_ERROR;
2057 else
2058 return GL_INVALID_OPERATION;
2059
2060 case GL_DEPTH_STENCIL:
2061 if (type == GL_UNSIGNED_INT_24_8)
2062 return GL_NO_ERROR;
2063 else if (ctx->Extensions.ARB_depth_buffer_float &&
2064 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2065 return GL_NO_ERROR;
2066 else
2067 return GL_INVALID_ENUM;
2068
2069 /* integer-valued formats */
2070 case GL_RED_INTEGER_EXT:
2071 case GL_GREEN_INTEGER_EXT:
2072 case GL_BLUE_INTEGER_EXT:
2073 case GL_ALPHA_INTEGER_EXT:
2074 case GL_RG_INTEGER:
2075 switch (type) {
2076 case GL_BYTE:
2077 case GL_UNSIGNED_BYTE:
2078 case GL_SHORT:
2079 case GL_UNSIGNED_SHORT:
2080 case GL_INT:
2081 case GL_UNSIGNED_INT:
2082 return (ctx->Version >= 30 ||
2083 ctx->Extensions.EXT_texture_integer)
2084 ? GL_NO_ERROR : GL_INVALID_ENUM;
2085 default:
2086 return GL_INVALID_ENUM;
2087 }
2088
2089 case GL_RGB_INTEGER_EXT:
2090 switch (type) {
2091 case GL_BYTE:
2092 case GL_UNSIGNED_BYTE:
2093 case GL_SHORT:
2094 case GL_UNSIGNED_SHORT:
2095 case GL_INT:
2096 case GL_UNSIGNED_INT:
2097 return (ctx->Version >= 30 ||
2098 ctx->Extensions.EXT_texture_integer)
2099 ? GL_NO_ERROR : GL_INVALID_ENUM;
2100 case GL_UNSIGNED_BYTE_3_3_2:
2101 case GL_UNSIGNED_BYTE_2_3_3_REV:
2102 case GL_UNSIGNED_SHORT_5_6_5:
2103 case GL_UNSIGNED_SHORT_5_6_5_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_BGR_INTEGER_EXT:
2111 switch (type) {
2112 case GL_BYTE:
2113 case GL_UNSIGNED_BYTE:
2114 case GL_SHORT:
2115 case GL_UNSIGNED_SHORT:
2116 case GL_INT:
2117 case GL_UNSIGNED_INT:
2118 /* NOTE: no packed formats w/ BGR format */
2119 return (ctx->Version >= 30 ||
2120 ctx->Extensions.EXT_texture_integer)
2121 ? GL_NO_ERROR : GL_INVALID_ENUM;
2122 default:
2123 return GL_INVALID_ENUM;
2124 }
2125
2126 case GL_RGBA_INTEGER_EXT:
2127 case GL_BGRA_INTEGER_EXT:
2128 switch (type) {
2129 case GL_BYTE:
2130 case GL_UNSIGNED_BYTE:
2131 case GL_SHORT:
2132 case GL_UNSIGNED_SHORT:
2133 case GL_INT:
2134 case GL_UNSIGNED_INT:
2135 return (ctx->Version >= 30 ||
2136 ctx->Extensions.EXT_texture_integer)
2137 ? GL_NO_ERROR : GL_INVALID_ENUM;
2138 case GL_UNSIGNED_SHORT_4_4_4_4:
2139 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2140 case GL_UNSIGNED_SHORT_5_5_5_1:
2141 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2142 case GL_UNSIGNED_INT_8_8_8_8:
2143 case GL_UNSIGNED_INT_8_8_8_8_REV:
2144 case GL_UNSIGNED_INT_10_10_10_2:
2145 case GL_UNSIGNED_INT_2_10_10_10_REV:
2146 return ctx->Extensions.ARB_texture_rgb10_a2ui
2147 ? GL_NO_ERROR : GL_INVALID_ENUM;
2148 default:
2149 return GL_INVALID_ENUM;
2150 }
2151
2152 case GL_LUMINANCE_INTEGER_EXT:
2153 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2154 switch (type) {
2155 case GL_BYTE:
2156 case GL_UNSIGNED_BYTE:
2157 case GL_SHORT:
2158 case GL_UNSIGNED_SHORT:
2159 case GL_INT:
2160 case GL_UNSIGNED_INT:
2161 return ctx->Extensions.EXT_texture_integer
2162 ? GL_NO_ERROR : GL_INVALID_ENUM;
2163 default:
2164 return GL_INVALID_ENUM;
2165 }
2166
2167 default:
2168 return GL_INVALID_ENUM;
2169 }
2170 return GL_NO_ERROR;
2171 }
2172
2173
2174 /**
2175 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2176 * and glTex[Sub]Image.
2177 * \return error code, or GL_NO_ERROR.
2178 */
2179 GLenum
2180 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2181 GLenum format, GLenum type,
2182 unsigned dimensions)
2183 {
2184 GLboolean type_valid = GL_TRUE;
2185
2186 switch (format) {
2187 case GL_RED:
2188 case GL_RG:
2189 if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_texture_rg)
2190 return GL_INVALID_VALUE;
2191 /* fallthrough */
2192 case GL_ALPHA:
2193 case GL_LUMINANCE:
2194 case GL_LUMINANCE_ALPHA:
2195 type_valid = (type == GL_UNSIGNED_BYTE
2196 || type == GL_FLOAT
2197 || type == GL_HALF_FLOAT_OES);
2198 break;
2199
2200 case GL_RGB:
2201 type_valid = (type == GL_UNSIGNED_BYTE
2202 || type == GL_UNSIGNED_SHORT_5_6_5
2203 || type == GL_FLOAT
2204 || type == GL_HALF_FLOAT_OES);
2205 break;
2206
2207 case GL_RGBA:
2208 type_valid = (type == GL_UNSIGNED_BYTE
2209 || type == GL_UNSIGNED_SHORT_4_4_4_4
2210 || type == GL_UNSIGNED_SHORT_5_5_5_1
2211 || type == GL_FLOAT
2212 || type == GL_HALF_FLOAT_OES
2213 || type == GL_UNSIGNED_INT_2_10_10_10_REV);
2214 break;
2215
2216 case GL_DEPTH_COMPONENT:
2217 /* This format is filtered against invalid dimensionalities elsewhere.
2218 */
2219 type_valid = (type == GL_UNSIGNED_SHORT
2220 || type == GL_UNSIGNED_INT);
2221 break;
2222
2223 case GL_DEPTH_STENCIL:
2224 /* This format is filtered against invalid dimensionalities elsewhere.
2225 */
2226 type_valid = (type == GL_UNSIGNED_INT_24_8);
2227 break;
2228
2229 case GL_BGRA_EXT:
2230 type_valid = (type == GL_UNSIGNED_BYTE);
2231
2232 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2233 * the format does not appear to be allowed for 3D textures in OpenGL
2234 * ES.
2235 */
2236 if (dimensions != 2)
2237 return GL_INVALID_VALUE;
2238
2239 break;
2240
2241 default:
2242 return GL_INVALID_VALUE;
2243 }
2244
2245 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2246 }
2247
2248 /**
2249 * Return the simple base format for a given internal texture format.
2250 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2251 *
2252 * \param ctx GL context.
2253 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2254 *
2255 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2256 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2257 *
2258 * This is the format which is used during texture application (i.e. the
2259 * texture format and env mode determine the arithmetic used.
2260 */
2261 GLint
2262 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2263 {
2264 switch (internalFormat) {
2265 case GL_ALPHA:
2266 case GL_ALPHA4:
2267 case GL_ALPHA8:
2268 case GL_ALPHA12:
2269 case GL_ALPHA16:
2270 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2271 case 1:
2272 case GL_LUMINANCE:
2273 case GL_LUMINANCE4:
2274 case GL_LUMINANCE8:
2275 case GL_LUMINANCE12:
2276 case GL_LUMINANCE16:
2277 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2278 case 2:
2279 case GL_LUMINANCE_ALPHA:
2280 case GL_LUMINANCE4_ALPHA4:
2281 case GL_LUMINANCE6_ALPHA2:
2282 case GL_LUMINANCE8_ALPHA8:
2283 case GL_LUMINANCE12_ALPHA4:
2284 case GL_LUMINANCE12_ALPHA12:
2285 case GL_LUMINANCE16_ALPHA16:
2286 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2287 case GL_INTENSITY:
2288 case GL_INTENSITY4:
2289 case GL_INTENSITY8:
2290 case GL_INTENSITY12:
2291 case GL_INTENSITY16:
2292 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2293 case 3:
2294 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2295 case GL_RGB:
2296 case GL_R3_G3_B2:
2297 case GL_RGB4:
2298 case GL_RGB5:
2299 case GL_RGB8:
2300 case GL_RGB10:
2301 case GL_RGB12:
2302 case GL_RGB16:
2303 return GL_RGB;
2304 case 4:
2305 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2306 case GL_RGBA:
2307 case GL_RGBA2:
2308 case GL_RGBA4:
2309 case GL_RGB5_A1:
2310 case GL_RGBA8:
2311 case GL_RGB10_A2:
2312 case GL_RGBA12:
2313 case GL_RGBA16:
2314 return GL_RGBA;
2315 default:
2316 ; /* fallthrough */
2317 }
2318
2319 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2320 */
2321 if (_mesa_is_gles(ctx)) {
2322 switch (internalFormat) {
2323 case GL_BGRA:
2324 return GL_RGBA;
2325 default:
2326 ; /* fallthrough */
2327 }
2328 }
2329
2330 if (ctx->Extensions.ARB_ES2_compatibility) {
2331 switch (internalFormat) {
2332 case GL_RGB565:
2333 return GL_RGB;
2334 default:
2335 ; /* fallthrough */
2336 }
2337 }
2338
2339 if (ctx->Extensions.ARB_depth_texture) {
2340 switch (internalFormat) {
2341 case GL_DEPTH_COMPONENT:
2342 case GL_DEPTH_COMPONENT16:
2343 case GL_DEPTH_COMPONENT24:
2344 case GL_DEPTH_COMPONENT32:
2345 return GL_DEPTH_COMPONENT;
2346 case GL_DEPTH_STENCIL:
2347 case GL_DEPTH24_STENCIL8:
2348 return GL_DEPTH_STENCIL;
2349 default:
2350 ; /* fallthrough */
2351 }
2352 }
2353
2354 if (ctx->Extensions.ARB_texture_stencil8) {
2355 switch (internalFormat) {
2356 case GL_STENCIL_INDEX:
2357 case GL_STENCIL_INDEX1:
2358 case GL_STENCIL_INDEX4:
2359 case GL_STENCIL_INDEX8:
2360 case GL_STENCIL_INDEX16:
2361 return GL_STENCIL_INDEX;
2362 default:
2363 ; /* fallthrough */
2364 }
2365 }
2366
2367 switch (internalFormat) {
2368 case GL_COMPRESSED_ALPHA:
2369 return GL_ALPHA;
2370 case GL_COMPRESSED_LUMINANCE:
2371 return GL_LUMINANCE;
2372 case GL_COMPRESSED_LUMINANCE_ALPHA:
2373 return GL_LUMINANCE_ALPHA;
2374 case GL_COMPRESSED_INTENSITY:
2375 return GL_INTENSITY;
2376 case GL_COMPRESSED_RGB:
2377 return GL_RGB;
2378 case GL_COMPRESSED_RGBA:
2379 return GL_RGBA;
2380 default:
2381 ; /* fallthrough */
2382 }
2383
2384 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2385 GLenum base_compressed =
2386 _mesa_gl_compressed_format_base_format(internalFormat);
2387 if (base_compressed)
2388 return base_compressed;
2389 }
2390
2391 if ((ctx->Extensions.KHR_texture_compression_astc_ldr &&
2392 is_astc_2d_format(internalFormat)) ||
2393 (ctx->Extensions.OES_texture_compression_astc &&
2394 is_astc_3d_format(internalFormat)))
2395 return GL_RGBA;
2396
2397 if (ctx->Extensions.MESA_ycbcr_texture) {
2398 if (internalFormat == GL_YCBCR_MESA)
2399 return GL_YCBCR_MESA;
2400 }
2401
2402 if (ctx->Extensions.ARB_texture_float) {
2403 switch (internalFormat) {
2404 case GL_ALPHA16F_ARB:
2405 case GL_ALPHA32F_ARB:
2406 return GL_ALPHA;
2407 case GL_RGBA16F_ARB:
2408 case GL_RGBA32F_ARB:
2409 return GL_RGBA;
2410 case GL_RGB16F_ARB:
2411 case GL_RGB32F_ARB:
2412 return GL_RGB;
2413 case GL_INTENSITY16F_ARB:
2414 case GL_INTENSITY32F_ARB:
2415 return GL_INTENSITY;
2416 case GL_LUMINANCE16F_ARB:
2417 case GL_LUMINANCE32F_ARB:
2418 return GL_LUMINANCE;
2419 case GL_LUMINANCE_ALPHA16F_ARB:
2420 case GL_LUMINANCE_ALPHA32F_ARB:
2421 return GL_LUMINANCE_ALPHA;
2422 default:
2423 ; /* fallthrough */
2424 }
2425 }
2426
2427 if (ctx->Extensions.EXT_texture_snorm) {
2428 switch (internalFormat) {
2429 case GL_RED_SNORM:
2430 case GL_R8_SNORM:
2431 case GL_R16_SNORM:
2432 return GL_RED;
2433 case GL_RG_SNORM:
2434 case GL_RG8_SNORM:
2435 case GL_RG16_SNORM:
2436 return GL_RG;
2437 case GL_RGB_SNORM:
2438 case GL_RGB8_SNORM:
2439 case GL_RGB16_SNORM:
2440 return GL_RGB;
2441 case GL_RGBA_SNORM:
2442 case GL_RGBA8_SNORM:
2443 case GL_RGBA16_SNORM:
2444 return GL_RGBA;
2445 case GL_ALPHA_SNORM:
2446 case GL_ALPHA8_SNORM:
2447 case GL_ALPHA16_SNORM:
2448 return GL_ALPHA;
2449 case GL_LUMINANCE_SNORM:
2450 case GL_LUMINANCE8_SNORM:
2451 case GL_LUMINANCE16_SNORM:
2452 return GL_LUMINANCE;
2453 case GL_LUMINANCE_ALPHA_SNORM:
2454 case GL_LUMINANCE8_ALPHA8_SNORM:
2455 case GL_LUMINANCE16_ALPHA16_SNORM:
2456 return GL_LUMINANCE_ALPHA;
2457 case GL_INTENSITY_SNORM:
2458 case GL_INTENSITY8_SNORM:
2459 case GL_INTENSITY16_SNORM:
2460 return GL_INTENSITY;
2461 default:
2462 ; /* fallthrough */
2463 }
2464 }
2465
2466 if (ctx->Extensions.EXT_texture_sRGB) {
2467 switch (internalFormat) {
2468 case GL_SRGB_EXT:
2469 case GL_SRGB8_EXT:
2470 case GL_COMPRESSED_SRGB_EXT:
2471 return GL_RGB;
2472 case GL_SRGB_ALPHA_EXT:
2473 case GL_SRGB8_ALPHA8_EXT:
2474 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2475 return GL_RGBA;
2476 case GL_SLUMINANCE_ALPHA_EXT:
2477 case GL_SLUMINANCE8_ALPHA8_EXT:
2478 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2479 return GL_LUMINANCE_ALPHA;
2480 case GL_SLUMINANCE_EXT:
2481 case GL_SLUMINANCE8_EXT:
2482 case GL_COMPRESSED_SLUMINANCE_EXT:
2483 return GL_LUMINANCE;
2484 default:
2485 ; /* fallthrough */
2486 }
2487 }
2488
2489 if (ctx->Version >= 30 ||
2490 ctx->Extensions.EXT_texture_integer) {
2491 switch (internalFormat) {
2492 case GL_RGBA8UI_EXT:
2493 case GL_RGBA16UI_EXT:
2494 case GL_RGBA32UI_EXT:
2495 case GL_RGBA8I_EXT:
2496 case GL_RGBA16I_EXT:
2497 case GL_RGBA32I_EXT:
2498 case GL_RGB10_A2UI:
2499 return GL_RGBA;
2500 case GL_RGB8UI_EXT:
2501 case GL_RGB16UI_EXT:
2502 case GL_RGB32UI_EXT:
2503 case GL_RGB8I_EXT:
2504 case GL_RGB16I_EXT:
2505 case GL_RGB32I_EXT:
2506 return GL_RGB;
2507 }
2508 }
2509
2510 if (ctx->Extensions.EXT_texture_integer) {
2511 switch (internalFormat) {
2512 case GL_ALPHA8UI_EXT:
2513 case GL_ALPHA16UI_EXT:
2514 case GL_ALPHA32UI_EXT:
2515 case GL_ALPHA8I_EXT:
2516 case GL_ALPHA16I_EXT:
2517 case GL_ALPHA32I_EXT:
2518 return GL_ALPHA;
2519 case GL_INTENSITY8UI_EXT:
2520 case GL_INTENSITY16UI_EXT:
2521 case GL_INTENSITY32UI_EXT:
2522 case GL_INTENSITY8I_EXT:
2523 case GL_INTENSITY16I_EXT:
2524 case GL_INTENSITY32I_EXT:
2525 return GL_INTENSITY;
2526 case GL_LUMINANCE8UI_EXT:
2527 case GL_LUMINANCE16UI_EXT:
2528 case GL_LUMINANCE32UI_EXT:
2529 case GL_LUMINANCE8I_EXT:
2530 case GL_LUMINANCE16I_EXT:
2531 case GL_LUMINANCE32I_EXT:
2532 return GL_LUMINANCE;
2533 case GL_LUMINANCE_ALPHA8UI_EXT:
2534 case GL_LUMINANCE_ALPHA16UI_EXT:
2535 case GL_LUMINANCE_ALPHA32UI_EXT:
2536 case GL_LUMINANCE_ALPHA8I_EXT:
2537 case GL_LUMINANCE_ALPHA16I_EXT:
2538 case GL_LUMINANCE_ALPHA32I_EXT:
2539 return GL_LUMINANCE_ALPHA;
2540 default:
2541 ; /* fallthrough */
2542 }
2543 }
2544
2545 if (ctx->Extensions.ARB_texture_rg) {
2546 switch (internalFormat) {
2547 case GL_R16F:
2548 case GL_R32F:
2549 if (!ctx->Extensions.ARB_texture_float)
2550 break;
2551 return GL_RED;
2552 case GL_R8I:
2553 case GL_R8UI:
2554 case GL_R16I:
2555 case GL_R16UI:
2556 case GL_R32I:
2557 case GL_R32UI:
2558 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2559 break;
2560 /* FALLTHROUGH */
2561 case GL_R8:
2562 case GL_R16:
2563 case GL_RED:
2564 case GL_COMPRESSED_RED:
2565 return GL_RED;
2566
2567 case GL_RG16F:
2568 case GL_RG32F:
2569 if (!ctx->Extensions.ARB_texture_float)
2570 break;
2571 return GL_RG;
2572 case GL_RG8I:
2573 case GL_RG8UI:
2574 case GL_RG16I:
2575 case GL_RG16UI:
2576 case GL_RG32I:
2577 case GL_RG32UI:
2578 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2579 break;
2580 /* FALLTHROUGH */
2581 case GL_RG:
2582 case GL_RG8:
2583 case GL_RG16:
2584 case GL_COMPRESSED_RG:
2585 return GL_RG;
2586 default:
2587 ; /* fallthrough */
2588 }
2589 }
2590
2591 if (ctx->Extensions.EXT_texture_shared_exponent) {
2592 switch (internalFormat) {
2593 case GL_RGB9_E5_EXT:
2594 return GL_RGB;
2595 default:
2596 ; /* fallthrough */
2597 }
2598 }
2599
2600 if (ctx->Extensions.EXT_packed_float) {
2601 switch (internalFormat) {
2602 case GL_R11F_G11F_B10F_EXT:
2603 return GL_RGB;
2604 default:
2605 ; /* fallthrough */
2606 }
2607 }
2608
2609 if (ctx->Extensions.ARB_depth_buffer_float) {
2610 switch (internalFormat) {
2611 case GL_DEPTH_COMPONENT32F:
2612 return GL_DEPTH_COMPONENT;
2613 case GL_DEPTH32F_STENCIL8:
2614 return GL_DEPTH_STENCIL;
2615 default:
2616 ; /* fallthrough */
2617 }
2618 }
2619
2620 return -1; /* error */
2621 }
2622
2623 /**
2624 * Returns the effective internal format from a texture format and type.
2625 * This is used by texture image operations internally for validation, when
2626 * the specified internal format is a base (unsized) format.
2627 *
2628 * This method will only return a valid effective internal format if the
2629 * combination of format, type and internal format in base form, is acceptable.
2630 *
2631 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2632 * in extensions, to unambiguously correspond to the given base format, then
2633 * that internal format is returned as the effective. Otherwise, if the
2634 * combination is accepted but a single effective format is not defined, the
2635 * passed base format will be returned instead.
2636 *
2637 * \param format the texture format
2638 * \param type the texture type
2639 */
2640 static GLenum
2641 _mesa_es3_effective_internal_format_for_format_and_type(GLenum format,
2642 GLenum type)
2643 {
2644 switch (type) {
2645 case GL_UNSIGNED_BYTE:
2646 switch (format) {
2647 case GL_RGBA:
2648 return GL_RGBA8;
2649 case GL_RGB:
2650 return GL_RGB8;
2651 case GL_RG:
2652 return GL_RG8;
2653 case GL_RED:
2654 return GL_R8;
2655 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2656 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2657 * internal formats, they do not correspond to GL constants, so the base
2658 * format is returned instead.
2659 */
2660 case GL_BGRA_EXT:
2661 case GL_LUMINANCE_ALPHA:
2662 case GL_LUMINANCE:
2663 case GL_ALPHA:
2664 return format;
2665 }
2666 break;
2667
2668 case GL_UNSIGNED_SHORT_4_4_4_4:
2669 if (format == GL_RGBA)
2670 return GL_RGBA4;
2671 break;
2672
2673 case GL_UNSIGNED_SHORT_5_5_5_1:
2674 if (format == GL_RGBA)
2675 return GL_RGB5_A1;
2676 break;
2677
2678 case GL_UNSIGNED_SHORT_5_6_5:
2679 if (format == GL_RGB)
2680 return GL_RGB565;
2681 break;
2682
2683 /* OES_packed_depth_stencil */
2684 case GL_UNSIGNED_INT_24_8:
2685 if (format == GL_DEPTH_STENCIL)
2686 return GL_DEPTH24_STENCIL8;
2687 break;
2688
2689 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2690 if (format == GL_DEPTH_STENCIL)
2691 return GL_DEPTH32F_STENCIL8;
2692 break;
2693
2694 case GL_UNSIGNED_SHORT:
2695 if (format == GL_DEPTH_COMPONENT)
2696 return GL_DEPTH_COMPONENT16;
2697 break;
2698
2699 case GL_UNSIGNED_INT:
2700 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2701 * the format.
2702 */
2703 if (format == GL_DEPTH_COMPONENT)
2704 return format;
2705 break;
2706
2707 /* OES_texture_float and OES_texture_half_float */
2708 case GL_FLOAT:
2709 if (format == GL_DEPTH_COMPONENT)
2710 return GL_DEPTH_COMPONENT32F;
2711 /* fall through */
2712 case GL_HALF_FLOAT_OES:
2713 switch (format) {
2714 case GL_RGBA:
2715 case GL_RGB:
2716 case GL_LUMINANCE_ALPHA:
2717 case GL_LUMINANCE:
2718 case GL_ALPHA:
2719 case GL_RED:
2720 case GL_RG:
2721 return format;
2722 }
2723 break;
2724 case GL_HALF_FLOAT:
2725 switch (format) {
2726 case GL_RG:
2727 case GL_RED:
2728 return format;
2729 }
2730 break;
2731
2732 /* GL_EXT_texture_type_2_10_10_10_REV */
2733 case GL_UNSIGNED_INT_2_10_10_10_REV:
2734 switch (format) {
2735 case GL_RGBA:
2736 case GL_RGB:
2737 return format;
2738 }
2739 break;
2740
2741 default:
2742 /* fall through and return NONE */
2743 break;
2744 }
2745
2746 return GL_NONE;
2747 }
2748
2749 /**
2750 * Do error checking of format/type combinations for OpenGL ES 3
2751 * glTex[Sub]Image.
2752 * \return error code, or GL_NO_ERROR.
2753 */
2754 GLenum
2755 _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
2756 GLenum format, GLenum type,
2757 GLenum internalFormat)
2758 {
2759 /* If internalFormat is an unsized format, then the effective internal
2760 * format derived from format and type should be used instead. Page 127,
2761 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2762 *
2763 * "if internalformat is a base internal format, the effective
2764 * internal format is a sized internal format that is derived
2765 * from the format and type for internal use by the GL.
2766 * Table 3.12 specifies the mapping of format and type to effective
2767 * internal formats. The effective internal format is used by the GL
2768 * for purposes such as texture completeness or type checks for
2769 * CopyTex* commands. In these cases, the GL is required to operate
2770 * as if the effective internal format was used as the internalformat
2771 * when specifying the texture data."
2772 */
2773 if (_mesa_is_enum_format_unsized(internalFormat)) {
2774 GLenum effectiveInternalFormat =
2775 _mesa_es3_effective_internal_format_for_format_and_type(format, type);
2776
2777 if (effectiveInternalFormat == GL_NONE)
2778 return GL_INVALID_OPERATION;
2779
2780 GLenum baseInternalFormat;
2781 if (internalFormat == GL_BGRA_EXT) {
2782 /* Unfortunately, _mesa_base_tex_format returns a base format of
2783 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2784 * asking the question, "what channels does this format have?"
2785 * However, if we're trying to determine if two internal formats
2786 * match in the ES3 sense, we actually want GL_BGRA.
2787 */
2788 baseInternalFormat = GL_BGRA_EXT;
2789 } else {
2790 baseInternalFormat =
2791 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2792 }
2793
2794 if (internalFormat != baseInternalFormat)
2795 return GL_INVALID_OPERATION;
2796
2797 internalFormat = effectiveInternalFormat;
2798 }
2799
2800 switch (format) {
2801 case GL_BGRA_EXT:
2802 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2803 return GL_INVALID_OPERATION;
2804 break;
2805
2806 case GL_RGBA:
2807 switch (type) {
2808 case GL_UNSIGNED_BYTE:
2809 switch (internalFormat) {
2810 case GL_RGBA:
2811 case GL_RGBA8:
2812 case GL_RGB5_A1:
2813 case GL_RGBA4:
2814 case GL_SRGB8_ALPHA8_EXT:
2815 break;
2816 default:
2817 return GL_INVALID_OPERATION;
2818 }
2819 break;
2820
2821 case GL_BYTE:
2822 if (internalFormat != GL_RGBA8_SNORM)
2823 return GL_INVALID_OPERATION;
2824 break;
2825
2826 case GL_UNSIGNED_SHORT_4_4_4_4:
2827 switch (internalFormat) {
2828 case GL_RGBA:
2829 case GL_RGBA4:
2830 break;
2831 default:
2832 return GL_INVALID_OPERATION;
2833 }
2834 break;
2835
2836 case GL_UNSIGNED_SHORT_5_5_5_1:
2837 switch (internalFormat) {
2838 case GL_RGBA:
2839 case GL_RGB5_A1:
2840 break;
2841 default:
2842 return GL_INVALID_OPERATION;
2843 }
2844 break;
2845
2846 case GL_UNSIGNED_INT_2_10_10_10_REV:
2847 switch (internalFormat) {
2848 case GL_RGBA: /* GL_EXT_texture_type_2_10_10_10_REV */
2849 case GL_RGB10_A2:
2850 case GL_RGB5_A1:
2851 break;
2852 default:
2853 return GL_INVALID_OPERATION;
2854 }
2855 break;
2856
2857 case GL_HALF_FLOAT:
2858 if (internalFormat != GL_RGBA16F)
2859 return GL_INVALID_OPERATION;
2860 break;
2861
2862 case GL_FLOAT:
2863 switch (internalFormat) {
2864 case GL_RGBA16F:
2865 case GL_RGBA32F:
2866 break;
2867 case GL_RGBA:
2868 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2869 break;
2870 default:
2871 return GL_INVALID_OPERATION;
2872 }
2873 break;
2874
2875 case GL_HALF_FLOAT_OES:
2876 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2877 break;
2878 default:
2879 return GL_INVALID_OPERATION;
2880 }
2881 break;
2882
2883 case GL_RGBA_INTEGER:
2884 switch (type) {
2885 case GL_UNSIGNED_BYTE:
2886 if (internalFormat != GL_RGBA8UI)
2887 return GL_INVALID_OPERATION;
2888 break;
2889
2890 case GL_BYTE:
2891 if (internalFormat != GL_RGBA8I)
2892 return GL_INVALID_OPERATION;
2893 break;
2894
2895 case GL_UNSIGNED_SHORT:
2896 if (internalFormat != GL_RGBA16UI)
2897 return GL_INVALID_OPERATION;
2898 break;
2899
2900 case GL_SHORT:
2901 if (internalFormat != GL_RGBA16I)
2902 return GL_INVALID_OPERATION;
2903 break;
2904
2905 case GL_UNSIGNED_INT:
2906 if (internalFormat != GL_RGBA32UI)
2907 return GL_INVALID_OPERATION;
2908 break;
2909
2910 case GL_INT:
2911 if (internalFormat != GL_RGBA32I)
2912 return GL_INVALID_OPERATION;
2913 break;
2914
2915 case GL_UNSIGNED_INT_2_10_10_10_REV:
2916 if (internalFormat != GL_RGB10_A2UI)
2917 return GL_INVALID_OPERATION;
2918 break;
2919
2920 default:
2921 return GL_INVALID_OPERATION;
2922 }
2923 break;
2924
2925 case GL_RGB:
2926 switch (type) {
2927 case GL_UNSIGNED_BYTE:
2928 switch (internalFormat) {
2929 case GL_RGB:
2930 case GL_RGB8:
2931 case GL_RGB565:
2932 case GL_SRGB8:
2933 break;
2934 default:
2935 return GL_INVALID_OPERATION;
2936 }
2937 break;
2938
2939 case GL_BYTE:
2940 if (internalFormat != GL_RGB8_SNORM)
2941 return GL_INVALID_OPERATION;
2942 break;
2943
2944 case GL_UNSIGNED_SHORT_5_6_5:
2945 switch (internalFormat) {
2946 case GL_RGB:
2947 case GL_RGB565:
2948 break;
2949 default:
2950 return GL_INVALID_OPERATION;
2951 }
2952 break;
2953
2954 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2955 if (internalFormat != GL_R11F_G11F_B10F)
2956 return GL_INVALID_OPERATION;
2957 break;
2958
2959 case GL_UNSIGNED_INT_5_9_9_9_REV:
2960 if (internalFormat != GL_RGB9_E5)
2961 return GL_INVALID_OPERATION;
2962 break;
2963
2964 case GL_HALF_FLOAT:
2965 switch (internalFormat) {
2966 case GL_RGB16F:
2967 case GL_R11F_G11F_B10F:
2968 case GL_RGB9_E5:
2969 break;
2970 default:
2971 return GL_INVALID_OPERATION;
2972 }
2973 break;
2974
2975 case GL_FLOAT:
2976 switch (internalFormat) {
2977 case GL_RGB16F:
2978 case GL_RGB32F:
2979 case GL_R11F_G11F_B10F:
2980 case GL_RGB9_E5:
2981 break;
2982 case GL_RGB:
2983 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2984 break;
2985 default:
2986 return GL_INVALID_OPERATION;
2987 }
2988 break;
2989
2990 case GL_HALF_FLOAT_OES:
2991 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
2992 return GL_INVALID_OPERATION;
2993 break;
2994
2995 case GL_UNSIGNED_INT_2_10_10_10_REV:
2996 switch (internalFormat) {
2997 case GL_RGB: /* GL_EXT_texture_type_2_10_10_10_REV */
2998 break;
2999 default:
3000 return GL_INVALID_OPERATION;
3001 }
3002 break;
3003
3004 default:
3005 return GL_INVALID_OPERATION;
3006 }
3007 break;
3008
3009 case GL_RGB_INTEGER:
3010 switch (type) {
3011 case GL_UNSIGNED_BYTE:
3012 if (internalFormat != GL_RGB8UI)
3013 return GL_INVALID_OPERATION;
3014 break;
3015
3016 case GL_BYTE:
3017 if (internalFormat != GL_RGB8I)
3018 return GL_INVALID_OPERATION;
3019 break;
3020
3021 case GL_UNSIGNED_SHORT:
3022 if (internalFormat != GL_RGB16UI)
3023 return GL_INVALID_OPERATION;
3024 break;
3025
3026 case GL_SHORT:
3027 if (internalFormat != GL_RGB16I)
3028 return GL_INVALID_OPERATION;
3029 break;
3030
3031 case GL_UNSIGNED_INT:
3032 if (internalFormat != GL_RGB32UI)
3033 return GL_INVALID_OPERATION;
3034 break;
3035
3036 case GL_INT:
3037 if (internalFormat != GL_RGB32I)
3038 return GL_INVALID_OPERATION;
3039 break;
3040
3041 default:
3042 return GL_INVALID_OPERATION;
3043 }
3044 break;
3045
3046 case GL_RG:
3047 switch (type) {
3048 case GL_UNSIGNED_BYTE:
3049 if (internalFormat != GL_RG8)
3050 return GL_INVALID_OPERATION;
3051 break;
3052
3053 case GL_BYTE:
3054 if (internalFormat != GL_RG8_SNORM)
3055 return GL_INVALID_OPERATION;
3056 break;
3057
3058 case GL_HALF_FLOAT:
3059 case GL_HALF_FLOAT_OES:
3060 switch (internalFormat) {
3061 case GL_RG16F:
3062 break;
3063 case GL_RG:
3064 if (ctx->Extensions.ARB_texture_rg &&
3065 ctx->Extensions.OES_texture_half_float)
3066 break;
3067 /* fallthrough */
3068 default:
3069 return GL_INVALID_OPERATION;
3070 }
3071 break;
3072
3073 case GL_FLOAT:
3074 switch (internalFormat) {
3075 case GL_RG16F:
3076 case GL_RG32F:
3077 break;
3078 case GL_RG:
3079 if (ctx->Extensions.ARB_texture_rg &&
3080 ctx->Extensions.OES_texture_float)
3081 break;
3082 /* fallthrough */
3083 default:
3084 return GL_INVALID_OPERATION;
3085 }
3086 break;
3087
3088 default:
3089 return GL_INVALID_OPERATION;
3090 }
3091 break;
3092
3093 case GL_RG_INTEGER:
3094 switch (type) {
3095 case GL_UNSIGNED_BYTE:
3096 if (internalFormat != GL_RG8UI)
3097 return GL_INVALID_OPERATION;
3098 break;
3099
3100 case GL_BYTE:
3101 if (internalFormat != GL_RG8I)
3102 return GL_INVALID_OPERATION;
3103 break;
3104
3105 case GL_UNSIGNED_SHORT:
3106 if (internalFormat != GL_RG16UI)
3107 return GL_INVALID_OPERATION;
3108 break;
3109
3110 case GL_SHORT:
3111 if (internalFormat != GL_RG16I)
3112 return GL_INVALID_OPERATION;
3113 break;
3114
3115 case GL_UNSIGNED_INT:
3116 if (internalFormat != GL_RG32UI)
3117 return GL_INVALID_OPERATION;
3118 break;
3119
3120 case GL_INT:
3121 if (internalFormat != GL_RG32I)
3122 return GL_INVALID_OPERATION;
3123 break;
3124
3125 default:
3126 return GL_INVALID_OPERATION;
3127 }
3128 break;
3129
3130 case GL_RED:
3131 switch (type) {
3132 case GL_UNSIGNED_BYTE:
3133 if (internalFormat != GL_R8)
3134 return GL_INVALID_OPERATION;
3135 break;
3136
3137 case GL_BYTE:
3138 if (internalFormat != GL_R8_SNORM)
3139 return GL_INVALID_OPERATION;
3140 break;
3141
3142 case GL_HALF_FLOAT:
3143 case GL_HALF_FLOAT_OES:
3144 switch (internalFormat) {
3145 case GL_R16F:
3146 break;
3147 case GL_RG:
3148 case GL_RED:
3149 if (ctx->Extensions.ARB_texture_rg &&
3150 ctx->Extensions.OES_texture_half_float)
3151 break;
3152 /* fallthrough */
3153 default:
3154 return GL_INVALID_OPERATION;
3155 }
3156 break;
3157
3158 case GL_FLOAT:
3159 switch (internalFormat) {
3160 case GL_R16F:
3161 case GL_R32F:
3162 break;
3163 case GL_RED:
3164 if (ctx->Extensions.ARB_texture_rg &&
3165 ctx->Extensions.OES_texture_float)
3166 break;
3167 /* fallthrough */
3168 default:
3169 return GL_INVALID_OPERATION;
3170 }
3171 break;
3172
3173 default:
3174 return GL_INVALID_OPERATION;
3175 }
3176 break;
3177
3178 case GL_RED_INTEGER:
3179 switch (type) {
3180 case GL_UNSIGNED_BYTE:
3181 if (internalFormat != GL_R8UI)
3182 return GL_INVALID_OPERATION;
3183 break;
3184
3185 case GL_BYTE:
3186 if (internalFormat != GL_R8I)
3187 return GL_INVALID_OPERATION;
3188 break;
3189
3190 case GL_UNSIGNED_SHORT:
3191 if (internalFormat != GL_R16UI)
3192 return GL_INVALID_OPERATION;
3193 break;
3194
3195 case GL_SHORT:
3196 if (internalFormat != GL_R16I)
3197 return GL_INVALID_OPERATION;
3198 break;
3199
3200 case GL_UNSIGNED_INT:
3201 if (internalFormat != GL_R32UI)
3202 return GL_INVALID_OPERATION;
3203 break;
3204
3205 case GL_INT:
3206 if (internalFormat != GL_R32I)
3207 return GL_INVALID_OPERATION;
3208 break;
3209
3210 default:
3211 return GL_INVALID_OPERATION;
3212 }
3213 break;
3214
3215 case GL_DEPTH_COMPONENT:
3216 switch (type) {
3217 case GL_UNSIGNED_SHORT:
3218 if (internalFormat != GL_DEPTH_COMPONENT
3219 && internalFormat != GL_DEPTH_COMPONENT16)
3220 return GL_INVALID_OPERATION;
3221 break;
3222
3223 case GL_UNSIGNED_INT:
3224 switch (internalFormat) {
3225 case GL_DEPTH_COMPONENT:
3226 case GL_DEPTH_COMPONENT16:
3227 case GL_DEPTH_COMPONENT24:
3228 break;
3229 default:
3230 return GL_INVALID_OPERATION;
3231 }
3232 break;
3233
3234 case GL_FLOAT:
3235 if (internalFormat != GL_DEPTH_COMPONENT32F)
3236 return GL_INVALID_OPERATION;
3237 break;
3238
3239 default:
3240 return GL_INVALID_OPERATION;
3241 }
3242 break;
3243
3244 case GL_DEPTH_STENCIL:
3245 switch (type) {
3246 case GL_UNSIGNED_INT_24_8:
3247 if (internalFormat != GL_DEPTH_STENCIL
3248 && internalFormat != GL_DEPTH24_STENCIL8)
3249 return GL_INVALID_OPERATION;
3250 break;
3251
3252 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3253 if (internalFormat != GL_DEPTH32F_STENCIL8)
3254 return GL_INVALID_OPERATION;
3255 break;
3256
3257 default:
3258 return GL_INVALID_OPERATION;
3259 }
3260 break;
3261
3262 case GL_STENCIL_INDEX:
3263 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3264 type != GL_UNSIGNED_BYTE ||
3265 internalFormat != GL_STENCIL_INDEX8) {
3266 return GL_INVALID_OPERATION;
3267 }
3268 break;
3269
3270 case GL_ALPHA:
3271 case GL_LUMINANCE:
3272 case GL_LUMINANCE_ALPHA:
3273 switch (type) {
3274 case GL_FLOAT:
3275 if (ctx->Extensions.OES_texture_float && internalFormat == format)
3276 break;
3277 case GL_HALF_FLOAT_OES:
3278 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
3279 break;
3280 default:
3281 if (type != GL_UNSIGNED_BYTE || format != internalFormat)
3282 return GL_INVALID_OPERATION;
3283 }
3284 }
3285
3286 return GL_NO_ERROR;
3287 }
3288
3289 static void
3290 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3291 {
3292 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3293 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3294 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3295 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3296 }
3297
3298 static bool
3299 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3300 {
3301 switch (format) {
3302 case GL_RGBA:
3303 case GL_RGBA_INTEGER_EXT:
3304 set_swizzle(swizzle, 0, 1, 2, 3);
3305 return true;
3306 case GL_BGRA:
3307 case GL_BGRA_INTEGER_EXT:
3308 set_swizzle(swizzle, 2, 1, 0, 3);
3309 return true;
3310 case GL_ABGR_EXT:
3311 set_swizzle(swizzle, 3, 2, 1, 0);
3312 return true;
3313 case GL_RGB:
3314 case GL_RGB_INTEGER_EXT:
3315 set_swizzle(swizzle, 0, 1, 2, 5);
3316 return true;
3317 case GL_BGR:
3318 case GL_BGR_INTEGER_EXT:
3319 set_swizzle(swizzle, 2, 1, 0, 5);
3320 return true;
3321 case GL_LUMINANCE_ALPHA:
3322 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3323 set_swizzle(swizzle, 0, 0, 0, 1);
3324 return true;
3325 case GL_RG:
3326 case GL_RG_INTEGER:
3327 set_swizzle(swizzle, 0, 1, 4, 5);
3328 return true;
3329 case GL_RED:
3330 case GL_RED_INTEGER_EXT:
3331 set_swizzle(swizzle, 0, 4, 4, 5);
3332 return true;
3333 case GL_GREEN:
3334 case GL_GREEN_INTEGER_EXT:
3335 set_swizzle(swizzle, 4, 0, 4, 5);
3336 return true;
3337 case GL_BLUE:
3338 case GL_BLUE_INTEGER_EXT:
3339 set_swizzle(swizzle, 4, 4, 0, 5);
3340 return true;
3341 case GL_ALPHA:
3342 case GL_ALPHA_INTEGER_EXT:
3343 set_swizzle(swizzle, 4, 4, 4, 0);
3344 return true;
3345 case GL_LUMINANCE:
3346 case GL_LUMINANCE_INTEGER_EXT:
3347 set_swizzle(swizzle, 0, 0, 0, 5);
3348 return true;
3349 case GL_INTENSITY:
3350 set_swizzle(swizzle, 0, 0, 0, 0);
3351 return true;
3352 default:
3353 return false;
3354 }
3355 }
3356
3357 /**
3358 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3359 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3360 * otherwise (for non-array formats).
3361 *
3362 * This function will typically be used to compute a mesa format from a GL type
3363 * so we can then call _mesa_format_convert. This function does
3364 * not consider byte swapping, so it returns types assuming that no byte
3365 * swapping is involved. If byte swapping is involved then clients are supposed
3366 * to handle that on their side before calling _mesa_format_convert.
3367 *
3368 * This function returns an uint32_t that can pack a mesa_format or a
3369 * mesa_array_format. Clients must check the mesa array format bit
3370 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3371 * format is a mesa_array_format or a mesa_format.
3372 */
3373 uint32_t
3374 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3375 {
3376 bool is_array_format = true;
3377 uint8_t swizzle[4];
3378 bool normalized = false, is_float = false, is_signed = false;
3379 int num_channels = 0, type_size = 0;
3380
3381 /* Extract array format type information from the OpenGL data type */
3382 switch (type) {
3383 case GL_UNSIGNED_BYTE:
3384 type_size = 1;
3385 break;
3386 case GL_BYTE:
3387 type_size = 1;
3388 is_signed = true;
3389 break;
3390 case GL_UNSIGNED_SHORT:
3391 type_size = 2;
3392 break;
3393 case GL_SHORT:
3394 type_size = 2;
3395 is_signed = true;
3396 break;
3397 case GL_UNSIGNED_INT:
3398 type_size = 4;
3399 break;
3400 case GL_INT:
3401 type_size = 4;
3402 is_signed = true;
3403 break;
3404 case GL_HALF_FLOAT:
3405 case GL_HALF_FLOAT_OES:
3406 type_size = 2;
3407 is_signed = true;
3408 is_float = true;
3409 break;
3410 case GL_FLOAT:
3411 type_size = 4;
3412 is_signed = true;
3413 is_float = true;
3414 break;
3415 default:
3416 is_array_format = false;
3417 break;
3418 }
3419
3420 /* Extract array format swizzle information from the OpenGL format */
3421 if (is_array_format)
3422 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3423
3424 /* If this is an array format type after checking data type and format,
3425 * create the array format
3426 */
3427 if (is_array_format) {
3428 normalized = !_mesa_is_enum_format_integer(format);
3429 num_channels = _mesa_components_in_format(format);
3430
3431 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
3432 normalized, num_channels,
3433 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3434 }
3435
3436 /* Otherwise this is not an array format, so return the mesa_format
3437 * matching the OpenGL format and data type
3438 */
3439 switch (type) {
3440 case GL_UNSIGNED_SHORT_5_6_5:
3441 if (format == GL_RGB)
3442 return MESA_FORMAT_B5G6R5_UNORM;
3443 else if (format == GL_BGR)
3444 return MESA_FORMAT_R5G6B5_UNORM;
3445 else if (format == GL_RGB_INTEGER)
3446 return MESA_FORMAT_B5G6R5_UINT;
3447 break;
3448 case GL_UNSIGNED_SHORT_5_6_5_REV:
3449 if (format == GL_RGB)
3450 return MESA_FORMAT_R5G6B5_UNORM;
3451 else if (format == GL_BGR)
3452 return MESA_FORMAT_B5G6R5_UNORM;
3453 else if (format == GL_RGB_INTEGER)
3454 return MESA_FORMAT_R5G6B5_UINT;
3455 break;
3456 case GL_UNSIGNED_SHORT_4_4_4_4:
3457 if (format == GL_RGBA)
3458 return MESA_FORMAT_A4B4G4R4_UNORM;
3459 else if (format == GL_BGRA)
3460 return MESA_FORMAT_A4R4G4B4_UNORM;
3461 else if (format == GL_ABGR_EXT)
3462 return MESA_FORMAT_R4G4B4A4_UNORM;
3463 else if (format == GL_RGBA_INTEGER)
3464 return MESA_FORMAT_A4B4G4R4_UINT;
3465 else if (format == GL_BGRA_INTEGER)
3466 return MESA_FORMAT_A4R4G4B4_UINT;
3467 break;
3468 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3469 if (format == GL_RGBA)
3470 return MESA_FORMAT_R4G4B4A4_UNORM;
3471 else if (format == GL_BGRA)
3472 return MESA_FORMAT_B4G4R4A4_UNORM;
3473 else if (format == GL_ABGR_EXT)
3474 return MESA_FORMAT_A4B4G4R4_UNORM;
3475 else if (format == GL_RGBA_INTEGER)
3476 return MESA_FORMAT_R4G4B4A4_UINT;
3477 else if (format == GL_BGRA_INTEGER)
3478 return MESA_FORMAT_B4G4R4A4_UINT;
3479 break;
3480 case GL_UNSIGNED_SHORT_5_5_5_1:
3481 if (format == GL_RGBA)
3482 return MESA_FORMAT_A1B5G5R5_UNORM;
3483 else if (format == GL_BGRA)
3484 return MESA_FORMAT_A1R5G5B5_UNORM;
3485 else if (format == GL_RGBA_INTEGER)
3486 return MESA_FORMAT_A1B5G5R5_UINT;
3487 else if (format == GL_BGRA_INTEGER)
3488 return MESA_FORMAT_A1R5G5B5_UINT;
3489 break;
3490 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3491 if (format == GL_RGBA)
3492 return MESA_FORMAT_R5G5B5A1_UNORM;
3493 else if (format == GL_BGRA)
3494 return MESA_FORMAT_B5G5R5A1_UNORM;
3495 else if (format == GL_RGBA_INTEGER)
3496 return MESA_FORMAT_R5G5B5A1_UINT;
3497 else if (format == GL_BGRA_INTEGER)
3498 return MESA_FORMAT_B5G5R5A1_UINT;
3499 break;
3500 case GL_UNSIGNED_BYTE_3_3_2:
3501 if (format == GL_RGB)
3502 return MESA_FORMAT_B2G3R3_UNORM;
3503 else if (format == GL_RGB_INTEGER)
3504 return MESA_FORMAT_B2G3R3_UINT;
3505 break;
3506 case GL_UNSIGNED_BYTE_2_3_3_REV:
3507 if (format == GL_RGB)
3508 return MESA_FORMAT_R3G3B2_UNORM;
3509 else if (format == GL_RGB_INTEGER)
3510 return MESA_FORMAT_R3G3B2_UINT;
3511 break;
3512 case GL_UNSIGNED_INT_5_9_9_9_REV:
3513 if (format == GL_RGB)
3514 return MESA_FORMAT_R9G9B9E5_FLOAT;
3515 break;
3516 case GL_UNSIGNED_INT_10_10_10_2:
3517 if (format == GL_RGBA)
3518 return MESA_FORMAT_A2B10G10R10_UNORM;
3519 else if (format == GL_RGBA_INTEGER)
3520 return MESA_FORMAT_A2B10G10R10_UINT;
3521 else if (format == GL_BGRA)
3522 return MESA_FORMAT_A2R10G10B10_UNORM;
3523 else if (format == GL_BGRA_INTEGER)
3524 return MESA_FORMAT_A2R10G10B10_UINT;
3525 break;
3526 case GL_UNSIGNED_INT_2_10_10_10_REV:
3527 if (format == GL_RGB)
3528 return MESA_FORMAT_R10G10B10X2_UNORM;
3529 if (format == GL_RGBA)
3530 return MESA_FORMAT_R10G10B10A2_UNORM;
3531 else if (format == GL_RGBA_INTEGER)
3532 return MESA_FORMAT_R10G10B10A2_UINT;
3533 else if (format == GL_BGRA)
3534 return MESA_FORMAT_B10G10R10A2_UNORM;
3535 else if (format == GL_BGRA_INTEGER)
3536 return MESA_FORMAT_B10G10R10A2_UINT;
3537 break;
3538 case GL_UNSIGNED_INT_8_8_8_8:
3539 if (format == GL_RGBA)
3540 return MESA_FORMAT_A8B8G8R8_UNORM;
3541 else if (format == GL_BGRA)
3542 return MESA_FORMAT_A8R8G8B8_UNORM;
3543 else if (format == GL_ABGR_EXT)
3544 return MESA_FORMAT_R8G8B8A8_UNORM;
3545 else if (format == GL_RGBA_INTEGER)
3546 return MESA_FORMAT_A8B8G8R8_UINT;
3547 else if (format == GL_BGRA_INTEGER)
3548 return MESA_FORMAT_A8R8G8B8_UINT;
3549 break;
3550 case GL_UNSIGNED_INT_8_8_8_8_REV:
3551 if (format == GL_RGBA)
3552 return MESA_FORMAT_R8G8B8A8_UNORM;
3553 else if (format == GL_BGRA)
3554 return MESA_FORMAT_B8G8R8A8_UNORM;
3555 else if (format == GL_ABGR_EXT)
3556 return MESA_FORMAT_A8B8G8R8_UNORM;
3557 else if (format == GL_RGBA_INTEGER)
3558 return MESA_FORMAT_R8G8B8A8_UINT;
3559 else if (format == GL_BGRA_INTEGER)
3560 return MESA_FORMAT_B8G8R8A8_UINT;
3561 break;
3562 case GL_UNSIGNED_SHORT_8_8_MESA:
3563 if (format == GL_YCBCR_MESA)
3564 return MESA_FORMAT_YCBCR;
3565 break;
3566 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3567 if (format == GL_YCBCR_MESA)
3568 return MESA_FORMAT_YCBCR_REV;
3569 break;
3570 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3571 if (format == GL_RGB)
3572 return MESA_FORMAT_R11G11B10_FLOAT;
3573 break;
3574 case GL_FLOAT:
3575 if (format == GL_DEPTH_COMPONENT)
3576 return MESA_FORMAT_Z_FLOAT32;
3577 break;
3578 case GL_UNSIGNED_INT:
3579 if (format == GL_DEPTH_COMPONENT)
3580 return MESA_FORMAT_Z_UNORM32;
3581 break;
3582 case GL_UNSIGNED_SHORT:
3583 if (format == GL_DEPTH_COMPONENT)
3584 return MESA_FORMAT_Z_UNORM16;
3585 break;
3586 case GL_UNSIGNED_INT_24_8:
3587 if (format == GL_DEPTH_STENCIL)
3588 return MESA_FORMAT_Z24_UNORM_S8_UINT;
3589 break;
3590 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3591 if (format == GL_DEPTH_STENCIL)
3592 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3593 break;
3594 default:
3595 break;
3596 }
3597
3598 /* If we got here it means that we could not find a Mesa format that
3599 * matches the GL format/type provided. We may need to add a new Mesa
3600 * format in that case.
3601 */
3602 unreachable("Unsupported format");
3603 }
3604
3605 /**
3606 * Returns true if \p internal_format is a sized internal format that
3607 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
3608 */
3609 bool
3610 _mesa_is_es3_color_renderable(GLenum internal_format)
3611 {
3612 switch (internal_format) {
3613 case GL_R8:
3614 case GL_RG8:
3615 case GL_RGB8:
3616 case GL_RGB565:
3617 case GL_RGBA4:
3618 case GL_RGB5_A1:
3619 case GL_RGBA8:
3620 case GL_RGB10_A2:
3621 case GL_RGB10_A2UI:
3622 case GL_SRGB8_ALPHA8:
3623 case GL_R16F:
3624 case GL_RG16F:
3625 case GL_RGBA16F:
3626 case GL_R32F:
3627 case GL_RG32F:
3628 case GL_RGBA32F:
3629 case GL_R11F_G11F_B10F:
3630 case GL_R8I:
3631 case GL_R8UI:
3632 case GL_R16I:
3633 case GL_R16UI:
3634 case GL_R32I:
3635 case GL_R32UI:
3636 case GL_RG8I:
3637 case GL_RG8UI:
3638 case GL_RG16I:
3639 case GL_RG16UI:
3640 case GL_RG32I:
3641 case GL_RG32UI:
3642 case GL_RGBA8I:
3643 case GL_RGBA8UI:
3644 case GL_RGBA16I:
3645 case GL_RGBA16UI:
3646 case GL_RGBA32I:
3647 case GL_RGBA32UI:
3648 return true;
3649 default:
3650 return false;
3651 }
3652 }
3653
3654 /**
3655 * Returns true if \p internal_format is a sized internal format that
3656 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
3657 */
3658 bool
3659 _mesa_is_es3_texture_filterable(const struct gl_context *ctx,
3660 GLenum internal_format)
3661 {
3662 switch (internal_format) {
3663 case GL_R8:
3664 case GL_R8_SNORM:
3665 case GL_RG8:
3666 case GL_RG8_SNORM:
3667 case GL_RGB8:
3668 case GL_RGB8_SNORM:
3669 case GL_RGB565:
3670 case GL_RGBA4:
3671 case GL_RGB5_A1:
3672 case GL_RGBA8:
3673 case GL_RGBA8_SNORM:
3674 case GL_RGB10_A2:
3675 case GL_SRGB8:
3676 case GL_SRGB8_ALPHA8:
3677 case GL_R16F:
3678 case GL_RG16F:
3679 case GL_RGB16F:
3680 case GL_RGBA16F:
3681 case GL_R11F_G11F_B10F:
3682 case GL_RGB9_E5:
3683 return true;
3684 case GL_R32F:
3685 case GL_RG32F:
3686 case GL_RGB32F:
3687 case GL_RGBA32F:
3688 /* The OES_texture_float_linear spec says:
3689 *
3690 * "When implemented against OpenGL ES 3.0 or later versions, sized
3691 * 32-bit floating-point formats become texture-filterable. This
3692 * should be noted by, for example, checking the ``TF'' column of
3693 * table 8.13 in the ES 3.1 Specification (``Correspondence of sized
3694 * internal formats to base internal formats ... and use cases ...'')
3695 * for the R32F, RG32F, RGB32F, and RGBA32F formats."
3696 */
3697 return ctx->Extensions.OES_texture_float_linear;
3698 default:
3699 return false;
3700 }
3701 }