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[mesa.git] / src / mesa / main / glformats.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008-2009 VMware, Inc.
6 * Copyright (c) 2012 Intel Corporation
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28 #include "context.h"
29 #include "glformats.h"
30 #include "formats.h"
31 #include "texcompress.h"
32 #include "enums.h"
33
34 enum {
35 ZERO = 4,
36 ONE = 5
37 };
38
39 enum {
40 IDX_LUMINANCE = 0,
41 IDX_ALPHA,
42 IDX_INTENSITY,
43 IDX_LUMINANCE_ALPHA,
44 IDX_RGB,
45 IDX_RGBA,
46 IDX_RED,
47 IDX_GREEN,
48 IDX_BLUE,
49 IDX_BGR,
50 IDX_BGRA,
51 IDX_ABGR,
52 IDX_RG,
53 MAX_IDX
54 };
55
56 #define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
57 #define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
58 #define MAP3(x,y,z) MAP4(x, y, z, ZERO)
59 #define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
60
61 static const struct {
62 GLubyte format_idx;
63 GLubyte to_rgba[6];
64 GLubyte from_rgba[6];
65 } mappings[MAX_IDX] =
66 {
67 {
68 IDX_LUMINANCE,
69 MAP4(0,0,0,ONE),
70 MAP1(0)
71 },
72
73 {
74 IDX_ALPHA,
75 MAP4(ZERO, ZERO, ZERO, 0),
76 MAP1(3)
77 },
78
79 {
80 IDX_INTENSITY,
81 MAP4(0, 0, 0, 0),
82 MAP1(0),
83 },
84
85 {
86 IDX_LUMINANCE_ALPHA,
87 MAP4(0,0,0,1),
88 MAP2(0,3)
89 },
90
91 {
92 IDX_RGB,
93 MAP4(0,1,2,ONE),
94 MAP3(0,1,2)
95 },
96
97 {
98 IDX_RGBA,
99 MAP4(0,1,2,3),
100 MAP4(0,1,2,3),
101 },
102
103 {
104 IDX_RED,
105 MAP4(0, ZERO, ZERO, ONE),
106 MAP1(0),
107 },
108
109 {
110 IDX_GREEN,
111 MAP4(ZERO, 0, ZERO, ONE),
112 MAP1(1),
113 },
114
115 {
116 IDX_BLUE,
117 MAP4(ZERO, ZERO, 0, ONE),
118 MAP1(2),
119 },
120
121 {
122 IDX_BGR,
123 MAP4(2,1,0,ONE),
124 MAP3(2,1,0)
125 },
126
127 {
128 IDX_BGRA,
129 MAP4(2,1,0,3),
130 MAP4(2,1,0,3)
131 },
132
133 {
134 IDX_ABGR,
135 MAP4(3,2,1,0),
136 MAP4(3,2,1,0)
137 },
138
139 {
140 IDX_RG,
141 MAP4(0, 1, ZERO, ONE),
142 MAP2(0, 1)
143 },
144 };
145
146 /**
147 * Convert a GL image format enum to an IDX_* value (see above).
148 */
149 static int
150 get_map_idx(GLenum value)
151 {
152 switch (value) {
153 case GL_LUMINANCE:
154 case GL_LUMINANCE_INTEGER_EXT:
155 return IDX_LUMINANCE;
156 case GL_ALPHA:
157 case GL_ALPHA_INTEGER:
158 return IDX_ALPHA;
159 case GL_INTENSITY:
160 return IDX_INTENSITY;
161 case GL_LUMINANCE_ALPHA:
162 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
163 return IDX_LUMINANCE_ALPHA;
164 case GL_RGB:
165 case GL_RGB_INTEGER:
166 return IDX_RGB;
167 case GL_RGBA:
168 case GL_RGBA_INTEGER:
169 return IDX_RGBA;
170 case GL_RED:
171 case GL_RED_INTEGER:
172 return IDX_RED;
173 case GL_GREEN:
174 return IDX_GREEN;
175 case GL_BLUE:
176 return IDX_BLUE;
177 case GL_BGR:
178 case GL_BGR_INTEGER:
179 return IDX_BGR;
180 case GL_BGRA:
181 case GL_BGRA_INTEGER:
182 return IDX_BGRA;
183 case GL_ABGR_EXT:
184 return IDX_ABGR;
185 case GL_RG:
186 case GL_RG_INTEGER:
187 return IDX_RG;
188 default:
189 _mesa_problem(NULL, "Unexpected inFormat %s",
190 _mesa_enum_to_string(value));
191 return 0;
192 }
193 }
194
195 /**
196 * When promoting texture formats (see below) we need to compute the
197 * mapping of dest components back to source components.
198 * This function does that.
199 * \param inFormat the incoming format of the texture
200 * \param outFormat the final texture format
201 * \return map[6] a full 6-component map
202 */
203 void
204 _mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
205 {
206 const int inFmt = get_map_idx(inFormat);
207 const int outFmt = get_map_idx(outFormat);
208 const GLubyte *in2rgba = mappings[inFmt].to_rgba;
209 const GLubyte *rgba2out = mappings[outFmt].from_rgba;
210 int i;
211
212 for (i = 0; i < 4; i++)
213 map[i] = in2rgba[rgba2out[i]];
214
215 map[ZERO] = ZERO;
216 map[ONE] = ONE;
217
218 #if 0
219 printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
220 inFormat, _mesa_enum_to_string(inFormat),
221 outFormat, _mesa_enum_to_string(outFormat),
222 map[0],
223 map[1],
224 map[2],
225 map[3],
226 map[4],
227 map[5]);
228 #endif
229 }
230
231 /**
232 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
233 */
234 GLboolean
235 _mesa_type_is_packed(GLenum type)
236 {
237 switch (type) {
238 case GL_UNSIGNED_BYTE_3_3_2:
239 case GL_UNSIGNED_BYTE_2_3_3_REV:
240 case MESA_UNSIGNED_BYTE_4_4:
241 case GL_UNSIGNED_SHORT_5_6_5:
242 case GL_UNSIGNED_SHORT_5_6_5_REV:
243 case GL_UNSIGNED_SHORT_4_4_4_4:
244 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
245 case GL_UNSIGNED_SHORT_5_5_5_1:
246 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
247 case GL_UNSIGNED_INT_8_8_8_8:
248 case GL_UNSIGNED_INT_8_8_8_8_REV:
249 case GL_UNSIGNED_INT_10_10_10_2:
250 case GL_UNSIGNED_INT_2_10_10_10_REV:
251 case GL_UNSIGNED_SHORT_8_8_MESA:
252 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
253 case GL_UNSIGNED_INT_24_8_EXT:
254 case GL_UNSIGNED_INT_5_9_9_9_REV:
255 case GL_UNSIGNED_INT_10F_11F_11F_REV:
256 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
257 return GL_TRUE;
258 }
259
260 return GL_FALSE;
261 }
262
263
264 /**
265 * Get the size of a GL data type.
266 *
267 * \param type GL data type.
268 *
269 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
270 * if an invalid type enum.
271 */
272 GLint
273 _mesa_sizeof_type(GLenum type)
274 {
275 switch (type) {
276 case GL_BITMAP:
277 return 0;
278 case GL_UNSIGNED_BYTE:
279 return sizeof(GLubyte);
280 case GL_BYTE:
281 return sizeof(GLbyte);
282 case GL_UNSIGNED_SHORT:
283 return sizeof(GLushort);
284 case GL_SHORT:
285 return sizeof(GLshort);
286 case GL_UNSIGNED_INT:
287 return sizeof(GLuint);
288 case GL_INT:
289 return sizeof(GLint);
290 case GL_FLOAT:
291 return sizeof(GLfloat);
292 case GL_DOUBLE:
293 return sizeof(GLdouble);
294 case GL_HALF_FLOAT_ARB:
295 case GL_HALF_FLOAT_OES:
296 return sizeof(GLhalfARB);
297 case GL_FIXED:
298 return sizeof(GLfixed);
299 default:
300 return -1;
301 }
302 }
303
304
305 /**
306 * Same as _mesa_sizeof_type() but also accepting the packed pixel
307 * format data types.
308 */
309 GLint
310 _mesa_sizeof_packed_type(GLenum type)
311 {
312 switch (type) {
313 case GL_BITMAP:
314 return 0;
315 case GL_UNSIGNED_BYTE:
316 return sizeof(GLubyte);
317 case GL_BYTE:
318 return sizeof(GLbyte);
319 case GL_UNSIGNED_SHORT:
320 return sizeof(GLushort);
321 case GL_SHORT:
322 return sizeof(GLshort);
323 case GL_UNSIGNED_INT:
324 return sizeof(GLuint);
325 case GL_INT:
326 return sizeof(GLint);
327 case GL_HALF_FLOAT_ARB:
328 case GL_HALF_FLOAT_OES:
329 return sizeof(GLhalfARB);
330 case GL_FLOAT:
331 return sizeof(GLfloat);
332 case GL_UNSIGNED_BYTE_3_3_2:
333 case GL_UNSIGNED_BYTE_2_3_3_REV:
334 case MESA_UNSIGNED_BYTE_4_4:
335 return sizeof(GLubyte);
336 case GL_UNSIGNED_SHORT_5_6_5:
337 case GL_UNSIGNED_SHORT_5_6_5_REV:
338 case GL_UNSIGNED_SHORT_4_4_4_4:
339 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
340 case GL_UNSIGNED_SHORT_5_5_5_1:
341 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
342 case GL_UNSIGNED_SHORT_8_8_MESA:
343 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
344 return sizeof(GLushort);
345 case GL_UNSIGNED_INT_8_8_8_8:
346 case GL_UNSIGNED_INT_8_8_8_8_REV:
347 case GL_UNSIGNED_INT_10_10_10_2:
348 case GL_UNSIGNED_INT_2_10_10_10_REV:
349 case GL_UNSIGNED_INT_24_8_EXT:
350 case GL_UNSIGNED_INT_5_9_9_9_REV:
351 case GL_UNSIGNED_INT_10F_11F_11F_REV:
352 return sizeof(GLuint);
353 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
354 return 8;
355 default:
356 return -1;
357 }
358 }
359
360
361 /**
362 * Get the number of components in a pixel format.
363 *
364 * \param format pixel format.
365 *
366 * \return the number of components in the given format, or -1 if a bad format.
367 */
368 GLint
369 _mesa_components_in_format(GLenum format)
370 {
371 switch (format) {
372 case GL_COLOR_INDEX:
373 case GL_STENCIL_INDEX:
374 case GL_DEPTH_COMPONENT:
375 case GL_RED:
376 case GL_RED_INTEGER_EXT:
377 case GL_GREEN:
378 case GL_GREEN_INTEGER_EXT:
379 case GL_BLUE:
380 case GL_BLUE_INTEGER_EXT:
381 case GL_ALPHA:
382 case GL_ALPHA_INTEGER_EXT:
383 case GL_LUMINANCE:
384 case GL_LUMINANCE_INTEGER_EXT:
385 case GL_INTENSITY:
386 return 1;
387
388 case GL_LUMINANCE_ALPHA:
389 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
390 case GL_RG:
391 case GL_YCBCR_MESA:
392 case GL_DEPTH_STENCIL_EXT:
393 case GL_RG_INTEGER:
394 return 2;
395
396 case GL_RGB:
397 case GL_BGR:
398 case GL_RGB_INTEGER_EXT:
399 case GL_BGR_INTEGER_EXT:
400 return 3;
401
402 case GL_RGBA:
403 case GL_BGRA:
404 case GL_ABGR_EXT:
405 case GL_RGBA_INTEGER_EXT:
406 case GL_BGRA_INTEGER_EXT:
407 return 4;
408
409 default:
410 return -1;
411 }
412 }
413
414
415 /**
416 * Get the bytes per pixel of pixel format type pair.
417 *
418 * \param format pixel format.
419 * \param type pixel type.
420 *
421 * \return bytes per pixel, or -1 if a bad format or type was given.
422 */
423 GLint
424 _mesa_bytes_per_pixel(GLenum format, GLenum type)
425 {
426 GLint comps = _mesa_components_in_format(format);
427 if (comps < 0)
428 return -1;
429
430 switch (type) {
431 case GL_BITMAP:
432 return 0; /* special case */
433 case GL_BYTE:
434 case GL_UNSIGNED_BYTE:
435 return comps * sizeof(GLubyte);
436 case GL_SHORT:
437 case GL_UNSIGNED_SHORT:
438 return comps * sizeof(GLshort);
439 case GL_INT:
440 case GL_UNSIGNED_INT:
441 return comps * sizeof(GLint);
442 case GL_FLOAT:
443 return comps * sizeof(GLfloat);
444 case GL_HALF_FLOAT_ARB:
445 case GL_HALF_FLOAT_OES:
446 return comps * sizeof(GLhalfARB);
447 case GL_UNSIGNED_BYTE_3_3_2:
448 case GL_UNSIGNED_BYTE_2_3_3_REV:
449 if (format == GL_RGB || format == GL_BGR ||
450 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
451 return sizeof(GLubyte);
452 else
453 return -1; /* error */
454 case GL_UNSIGNED_SHORT_5_6_5:
455 case GL_UNSIGNED_SHORT_5_6_5_REV:
456 if (format == GL_RGB || format == GL_BGR ||
457 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
458 return sizeof(GLushort);
459 else
460 return -1; /* error */
461 case GL_UNSIGNED_SHORT_4_4_4_4:
462 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
463 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
464 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
465 return sizeof(GLushort);
466 else
467 return -1;
468 case GL_UNSIGNED_SHORT_5_5_5_1:
469 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
470 if (format == GL_RGBA || format == GL_BGRA ||
471 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
472 return sizeof(GLushort);
473 else
474 return -1;
475 case GL_UNSIGNED_INT_8_8_8_8:
476 case GL_UNSIGNED_INT_8_8_8_8_REV:
477 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
478 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
479 format == GL_RGB)
480 return sizeof(GLuint);
481 else
482 return -1;
483 case GL_UNSIGNED_INT_10_10_10_2:
484 case GL_UNSIGNED_INT_2_10_10_10_REV:
485 if (format == GL_RGBA || format == GL_BGRA ||
486 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
487 format == GL_RGB)
488 return sizeof(GLuint);
489 else
490 return -1;
491 case GL_UNSIGNED_SHORT_8_8_MESA:
492 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
493 if (format == GL_YCBCR_MESA)
494 return sizeof(GLushort);
495 else
496 return -1;
497 case GL_UNSIGNED_INT_24_8_EXT:
498 if (format == GL_DEPTH_COMPONENT ||
499 format == GL_DEPTH_STENCIL_EXT)
500 return sizeof(GLuint);
501 else
502 return -1;
503 case GL_UNSIGNED_INT_5_9_9_9_REV:
504 if (format == GL_RGB)
505 return sizeof(GLuint);
506 else
507 return -1;
508 case GL_UNSIGNED_INT_10F_11F_11F_REV:
509 if (format == GL_RGB)
510 return sizeof(GLuint);
511 else
512 return -1;
513 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
514 if (format == GL_DEPTH_STENCIL)
515 return 8;
516 else
517 return -1;
518 default:
519 return -1;
520 }
521 }
522
523
524 /**
525 * Get the number of bytes for a vertex attrib with the given number of
526 * components and type.
527 *
528 * \param comps number of components.
529 * \param type data type.
530 *
531 * \return bytes per attribute, or -1 if a bad comps/type combination was given.
532 */
533 GLint
534 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
535 {
536 switch (type) {
537 case GL_BYTE:
538 case GL_UNSIGNED_BYTE:
539 return comps * sizeof(GLubyte);
540 case GL_SHORT:
541 case GL_UNSIGNED_SHORT:
542 return comps * sizeof(GLshort);
543 case GL_INT:
544 case GL_UNSIGNED_INT:
545 return comps * sizeof(GLint);
546 case GL_FLOAT:
547 return comps * sizeof(GLfloat);
548 case GL_HALF_FLOAT_ARB:
549 case GL_HALF_FLOAT_OES:
550 return comps * sizeof(GLhalfARB);
551 case GL_DOUBLE:
552 return comps * sizeof(GLdouble);
553 case GL_FIXED:
554 return comps * sizeof(GLfixed);
555 case GL_INT_2_10_10_10_REV:
556 case GL_UNSIGNED_INT_2_10_10_10_REV:
557 if (comps == 4)
558 return sizeof(GLuint);
559 else
560 return -1;
561 case GL_UNSIGNED_INT_10F_11F_11F_REV:
562 if (comps == 3)
563 return sizeof(GLuint);
564 else
565 return -1;
566 case GL_UNSIGNED_INT64_ARB:
567 return comps * 8;
568 default:
569 return -1;
570 }
571 }
572
573 /**
574 * Test if the given format is unsized.
575 */
576 GLboolean
577 _mesa_is_enum_format_unsized(GLenum format)
578 {
579 switch (format) {
580 case GL_RGBA:
581 case GL_BGRA:
582 case GL_ABGR_EXT:
583 case GL_RGB:
584 case GL_BGR:
585 case GL_RG:
586 case GL_RED:
587 case GL_GREEN:
588 case GL_BLUE:
589 case GL_ALPHA:
590 case GL_INTENSITY:
591 case GL_LUMINANCE:
592 case GL_LUMINANCE_ALPHA:
593
594 case GL_SRGB:
595 case GL_SRGB_ALPHA:
596 case GL_SLUMINANCE:
597 case GL_SLUMINANCE_ALPHA:
598
599 case GL_RGBA_SNORM:
600 case GL_RGB_SNORM:
601 case GL_RG_SNORM:
602 case GL_RED_SNORM:
603 case GL_ALPHA_SNORM:
604 case GL_INTENSITY_SNORM:
605 case GL_LUMINANCE_SNORM:
606 case GL_LUMINANCE_ALPHA_SNORM:
607
608 case GL_RED_INTEGER:
609 case GL_GREEN_INTEGER:
610 case GL_BLUE_INTEGER:
611 case GL_ALPHA_INTEGER:
612 case GL_RGB_INTEGER:
613 case GL_RGBA_INTEGER:
614 case GL_BGR_INTEGER:
615 case GL_BGRA_INTEGER:
616 case GL_RG_INTEGER:
617 case GL_LUMINANCE_INTEGER_EXT:
618 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
619
620 case GL_DEPTH_COMPONENT:
621 case GL_DEPTH_STENCIL:
622 case GL_STENCIL_INDEX:
623 return GL_TRUE;
624 default:
625 return GL_FALSE;
626 }
627 }
628
629 /**
630 * Test if the given format is a UNORM (unsigned-normalized) format.
631 */
632 GLboolean
633 _mesa_is_enum_format_unorm(GLenum format)
634 {
635 switch(format) {
636 case GL_RED:
637 case GL_GREEN:
638 case GL_BLUE:
639 case GL_ALPHA:
640 case GL_ALPHA4:
641 case GL_ALPHA8:
642 case GL_ALPHA12:
643 case GL_ALPHA16:
644 case 1:
645 case GL_LUMINANCE:
646 case GL_SLUMINANCE:
647 case GL_LUMINANCE4:
648 case GL_LUMINANCE8:
649 case GL_LUMINANCE12:
650 case GL_LUMINANCE16:
651 case 2:
652 case GL_LUMINANCE_ALPHA:
653 case GL_SLUMINANCE_ALPHA:
654 case GL_LUMINANCE4_ALPHA4:
655 case GL_LUMINANCE6_ALPHA2:
656 case GL_LUMINANCE8_ALPHA8:
657 case GL_LUMINANCE12_ALPHA4:
658 case GL_LUMINANCE12_ALPHA12:
659 case GL_LUMINANCE16_ALPHA16:
660 case GL_INTENSITY:
661 case GL_INTENSITY4:
662 case GL_INTENSITY8:
663 case GL_INTENSITY12:
664 case GL_INTENSITY16:
665 case GL_R8:
666 case GL_R16:
667 case GL_RG:
668 case GL_RG8:
669 case GL_RG16:
670 case 3:
671 case GL_RGB:
672 case GL_BGR:
673 case GL_SRGB:
674 case GL_R3_G3_B2:
675 case GL_RGB4:
676 case GL_RGB5:
677 case GL_RGB565:
678 case GL_RGB8:
679 case GL_RGB10:
680 case GL_RGB12:
681 case GL_RGB16:
682 case 4:
683 case GL_ABGR_EXT:
684 case GL_RGBA:
685 case GL_BGRA:
686 case GL_SRGB_ALPHA:
687 case GL_RGBA2:
688 case GL_RGBA4:
689 case GL_RGB5_A1:
690 case GL_RGBA8:
691 case GL_RGB10_A2:
692 case GL_RGBA12:
693 case GL_RGBA16:
694 return GL_TRUE;
695 default:
696 return GL_FALSE;
697 }
698 }
699
700 /**
701 * Test if the given format is a SNORM (signed-normalized) format.
702 */
703 GLboolean
704 _mesa_is_enum_format_snorm(GLenum format)
705 {
706 switch (format) {
707 /* signed, normalized texture formats */
708 case GL_RED_SNORM:
709 case GL_R8_SNORM:
710 case GL_R16_SNORM:
711 case GL_RG_SNORM:
712 case GL_RG8_SNORM:
713 case GL_RG16_SNORM:
714 case GL_RGB_SNORM:
715 case GL_RGB8_SNORM:
716 case GL_RGB16_SNORM:
717 case GL_RGBA_SNORM:
718 case GL_RGBA8_SNORM:
719 case GL_RGBA16_SNORM:
720 case GL_ALPHA_SNORM:
721 case GL_ALPHA8_SNORM:
722 case GL_ALPHA16_SNORM:
723 case GL_LUMINANCE_SNORM:
724 case GL_LUMINANCE8_SNORM:
725 case GL_LUMINANCE16_SNORM:
726 case GL_LUMINANCE_ALPHA_SNORM:
727 case GL_LUMINANCE8_ALPHA8_SNORM:
728 case GL_LUMINANCE16_ALPHA16_SNORM:
729 case GL_INTENSITY_SNORM:
730 case GL_INTENSITY8_SNORM:
731 case GL_INTENSITY16_SNORM:
732 return GL_TRUE;
733 default:
734 return GL_FALSE;
735 }
736 }
737
738 /**
739 * Test if the given format is an integer (non-normalized) format.
740 */
741 GLboolean
742 _mesa_is_enum_format_unsigned_int(GLenum format)
743 {
744 switch (format) {
745 /* specific integer formats */
746 case GL_RGBA32UI_EXT:
747 case GL_RGB32UI_EXT:
748 case GL_RG32UI:
749 case GL_R32UI:
750 case GL_ALPHA32UI_EXT:
751 case GL_INTENSITY32UI_EXT:
752 case GL_LUMINANCE32UI_EXT:
753 case GL_LUMINANCE_ALPHA32UI_EXT:
754 case GL_RGBA16UI_EXT:
755 case GL_RGB16UI_EXT:
756 case GL_RG16UI:
757 case GL_R16UI:
758 case GL_ALPHA16UI_EXT:
759 case GL_INTENSITY16UI_EXT:
760 case GL_LUMINANCE16UI_EXT:
761 case GL_LUMINANCE_ALPHA16UI_EXT:
762 case GL_RGBA8UI_EXT:
763 case GL_RGB8UI_EXT:
764 case GL_RG8UI:
765 case GL_R8UI:
766 case GL_ALPHA8UI_EXT:
767 case GL_INTENSITY8UI_EXT:
768 case GL_LUMINANCE8UI_EXT:
769 case GL_LUMINANCE_ALPHA8UI_EXT:
770 case GL_RGB10_A2UI:
771 return GL_TRUE;
772 default:
773 return GL_FALSE;
774 }
775 }
776
777
778 /**
779 * Test if the given format is an integer (non-normalized) format.
780 */
781 GLboolean
782 _mesa_is_enum_format_signed_int(GLenum format)
783 {
784 switch (format) {
785 /* generic integer formats */
786 case GL_RED_INTEGER_EXT:
787 case GL_GREEN_INTEGER_EXT:
788 case GL_BLUE_INTEGER_EXT:
789 case GL_ALPHA_INTEGER_EXT:
790 case GL_RGB_INTEGER_EXT:
791 case GL_RGBA_INTEGER_EXT:
792 case GL_BGR_INTEGER_EXT:
793 case GL_BGRA_INTEGER_EXT:
794 case GL_LUMINANCE_INTEGER_EXT:
795 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
796 case GL_RG_INTEGER:
797 /* specific integer formats */
798 case GL_RGBA32I_EXT:
799 case GL_RGB32I_EXT:
800 case GL_RG32I:
801 case GL_R32I:
802 case GL_ALPHA32I_EXT:
803 case GL_INTENSITY32I_EXT:
804 case GL_LUMINANCE32I_EXT:
805 case GL_LUMINANCE_ALPHA32I_EXT:
806 case GL_RGBA16I_EXT:
807 case GL_RGB16I_EXT:
808 case GL_RG16I:
809 case GL_R16I:
810 case GL_ALPHA16I_EXT:
811 case GL_INTENSITY16I_EXT:
812 case GL_LUMINANCE16I_EXT:
813 case GL_LUMINANCE_ALPHA16I_EXT:
814 case GL_RGBA8I_EXT:
815 case GL_RGB8I_EXT:
816 case GL_RG8I:
817 case GL_R8I:
818 case GL_ALPHA8I_EXT:
819 case GL_INTENSITY8I_EXT:
820 case GL_LUMINANCE8I_EXT:
821 case GL_LUMINANCE_ALPHA8I_EXT:
822 return GL_TRUE;
823 default:
824 return GL_FALSE;
825 }
826 }
827
828 /**
829 * Test if the given format is an ASTC 2D format.
830 */
831 static bool
832 is_astc_2d_format(GLenum internalFormat)
833 {
834 switch (internalFormat) {
835 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
844 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
845 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
846 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
847 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
848 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
858 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
859 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
860 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
861 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
862 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
863 return true;
864 default:
865 return false;
866 }
867 }
868
869 /**
870 * Test if the given format is an ASTC 3D format.
871 */
872 static bool
873 is_astc_3d_format(GLenum internalFormat)
874 {
875 switch (internalFormat) {
876 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
877 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
878 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
879 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
880 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
881 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
882 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
883 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
884 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
885 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
886 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
887 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
888 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
889 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
890 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
891 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
892 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
893 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
894 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
895 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
896 return true;
897 default:
898 return false;
899 }
900 }
901
902 /**
903 * Test if the given format is an ASTC format.
904 */
905 GLboolean
906 _mesa_is_astc_format(GLenum internalFormat)
907 {
908 return is_astc_2d_format(internalFormat) ||
909 is_astc_3d_format(internalFormat);
910 }
911
912 /**
913 * Test if the given format is an ETC2 format.
914 */
915 GLboolean
916 _mesa_is_etc2_format(GLenum internalFormat)
917 {
918 switch (internalFormat) {
919 case GL_COMPRESSED_RGB8_ETC2:
920 case GL_COMPRESSED_SRGB8_ETC2:
921 case GL_COMPRESSED_RGBA8_ETC2_EAC:
922 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
923 case GL_COMPRESSED_R11_EAC:
924 case GL_COMPRESSED_RG11_EAC:
925 case GL_COMPRESSED_SIGNED_R11_EAC:
926 case GL_COMPRESSED_SIGNED_RG11_EAC:
927 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
928 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
929 return true;
930 default:
931 return false;
932 }
933 }
934
935 /**
936 * Test if the given format is an integer (non-normalized) format.
937 */
938 GLboolean
939 _mesa_is_enum_format_integer(GLenum format)
940 {
941 return _mesa_is_enum_format_unsigned_int(format) ||
942 _mesa_is_enum_format_signed_int(format);
943 }
944
945
946 GLboolean
947 _mesa_is_type_unsigned(GLenum type)
948 {
949 switch (type) {
950 case GL_UNSIGNED_INT:
951 case GL_UNSIGNED_INT_8_8_8_8:
952 case GL_UNSIGNED_INT_8_8_8_8_REV:
953 case GL_UNSIGNED_INT_10_10_10_2:
954 case GL_UNSIGNED_INT_2_10_10_10_REV:
955
956 case GL_UNSIGNED_SHORT:
957 case GL_UNSIGNED_SHORT_4_4_4_4:
958 case GL_UNSIGNED_SHORT_5_5_5_1:
959 case GL_UNSIGNED_SHORT_5_6_5:
960 case GL_UNSIGNED_SHORT_5_6_5_REV:
961 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
962 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
963 case GL_UNSIGNED_SHORT_8_8_MESA:
964 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
965
966 case GL_UNSIGNED_BYTE:
967 case GL_UNSIGNED_BYTE_3_3_2:
968 case GL_UNSIGNED_BYTE_2_3_3_REV:
969 return GL_TRUE;
970
971 default:
972 return GL_FALSE;
973 }
974 }
975
976
977 /**
978 * Test if the given image format is a color/RGBA format (i.e., not color
979 * index, depth, stencil, etc).
980 * \param format the image format value (may by an internal texture format)
981 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
982 */
983 GLboolean
984 _mesa_is_color_format(GLenum format)
985 {
986 switch (format) {
987 case GL_RED:
988 case GL_GREEN:
989 case GL_BLUE:
990 case GL_ALPHA:
991 case GL_ALPHA4:
992 case GL_ALPHA8:
993 case GL_ALPHA12:
994 case GL_ALPHA16:
995 case 1:
996 case GL_LUMINANCE:
997 case GL_LUMINANCE4:
998 case GL_LUMINANCE8:
999 case GL_LUMINANCE12:
1000 case GL_LUMINANCE16:
1001 case 2:
1002 case GL_LUMINANCE_ALPHA:
1003 case GL_LUMINANCE4_ALPHA4:
1004 case GL_LUMINANCE6_ALPHA2:
1005 case GL_LUMINANCE8_ALPHA8:
1006 case GL_LUMINANCE12_ALPHA4:
1007 case GL_LUMINANCE12_ALPHA12:
1008 case GL_LUMINANCE16_ALPHA16:
1009 case GL_INTENSITY:
1010 case GL_INTENSITY4:
1011 case GL_INTENSITY8:
1012 case GL_INTENSITY12:
1013 case GL_INTENSITY16:
1014 case GL_R8:
1015 case GL_R16:
1016 case GL_RG:
1017 case GL_RG8:
1018 case GL_RG16:
1019 case 3:
1020 case GL_RGB:
1021 case GL_BGR:
1022 case GL_R3_G3_B2:
1023 case GL_RGB4:
1024 case GL_RGB5:
1025 case GL_RGB565:
1026 case GL_RGB8:
1027 case GL_RGB10:
1028 case GL_RGB12:
1029 case GL_RGB16:
1030 case 4:
1031 case GL_ABGR_EXT:
1032 case GL_RGBA:
1033 case GL_BGRA:
1034 case GL_RGBA2:
1035 case GL_RGBA4:
1036 case GL_RGB5_A1:
1037 case GL_RGBA8:
1038 case GL_RGB10_A2:
1039 case GL_RGBA12:
1040 case GL_RGBA16:
1041 /* float texture formats */
1042 case GL_ALPHA16F_ARB:
1043 case GL_ALPHA32F_ARB:
1044 case GL_LUMINANCE16F_ARB:
1045 case GL_LUMINANCE32F_ARB:
1046 case GL_LUMINANCE_ALPHA16F_ARB:
1047 case GL_LUMINANCE_ALPHA32F_ARB:
1048 case GL_INTENSITY16F_ARB:
1049 case GL_INTENSITY32F_ARB:
1050 case GL_R16F:
1051 case GL_R32F:
1052 case GL_RG16F:
1053 case GL_RG32F:
1054 case GL_RGB16F_ARB:
1055 case GL_RGB32F_ARB:
1056 case GL_RGBA16F_ARB:
1057 case GL_RGBA32F_ARB:
1058 /* compressed formats */
1059 case GL_COMPRESSED_ALPHA:
1060 case GL_COMPRESSED_LUMINANCE:
1061 case GL_COMPRESSED_LUMINANCE_ALPHA:
1062 case GL_COMPRESSED_INTENSITY:
1063 case GL_COMPRESSED_RED:
1064 case GL_COMPRESSED_RG:
1065 case GL_COMPRESSED_RGB:
1066 case GL_COMPRESSED_RGBA:
1067 case GL_RGB_S3TC:
1068 case GL_RGB4_S3TC:
1069 case GL_RGBA_S3TC:
1070 case GL_RGBA4_S3TC:
1071 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1072 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1073 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1074 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1075 case GL_COMPRESSED_RGB_FXT1_3DFX:
1076 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1077 case GL_SRGB_EXT:
1078 case GL_SRGB8_EXT:
1079 case GL_SRGB_ALPHA_EXT:
1080 case GL_SRGB8_ALPHA8_EXT:
1081 case GL_SLUMINANCE_ALPHA_EXT:
1082 case GL_SLUMINANCE8_ALPHA8_EXT:
1083 case GL_SLUMINANCE_EXT:
1084 case GL_SLUMINANCE8_EXT:
1085 case GL_COMPRESSED_SRGB_EXT:
1086 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1087 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1088 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1089 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1090 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1091 case GL_COMPRESSED_SLUMINANCE_EXT:
1092 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1093 case GL_COMPRESSED_RED_RGTC1:
1094 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1095 case GL_COMPRESSED_RG_RGTC2:
1096 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1097 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1098 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1099 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1100 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1101 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1102 case GL_ETC1_RGB8_OES:
1103 case GL_COMPRESSED_RGB8_ETC2:
1104 case GL_COMPRESSED_SRGB8_ETC2:
1105 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1106 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1107 case GL_COMPRESSED_R11_EAC:
1108 case GL_COMPRESSED_RG11_EAC:
1109 case GL_COMPRESSED_SIGNED_R11_EAC:
1110 case GL_COMPRESSED_SIGNED_RG11_EAC:
1111 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1112 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1113 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1114 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1115 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1116 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1117 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1118 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1119 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1120 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1121 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1122 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1123 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1124 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1125 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1126 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1127 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1128 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1129 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1130 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1131 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1132 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1133 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1134 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1135 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1136 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1137 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1138 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1139 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1140 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1141 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1142 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1143 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1144 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1145 /* generic integer formats */
1146 case GL_RED_INTEGER_EXT:
1147 case GL_GREEN_INTEGER_EXT:
1148 case GL_BLUE_INTEGER_EXT:
1149 case GL_ALPHA_INTEGER_EXT:
1150 case GL_RGB_INTEGER_EXT:
1151 case GL_RGBA_INTEGER_EXT:
1152 case GL_BGR_INTEGER_EXT:
1153 case GL_BGRA_INTEGER_EXT:
1154 case GL_RG_INTEGER:
1155 case GL_LUMINANCE_INTEGER_EXT:
1156 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1157 /* sized integer formats */
1158 case GL_RGBA32UI_EXT:
1159 case GL_RGB32UI_EXT:
1160 case GL_RG32UI:
1161 case GL_R32UI:
1162 case GL_ALPHA32UI_EXT:
1163 case GL_INTENSITY32UI_EXT:
1164 case GL_LUMINANCE32UI_EXT:
1165 case GL_LUMINANCE_ALPHA32UI_EXT:
1166 case GL_RGBA16UI_EXT:
1167 case GL_RGB16UI_EXT:
1168 case GL_RG16UI:
1169 case GL_R16UI:
1170 case GL_ALPHA16UI_EXT:
1171 case GL_INTENSITY16UI_EXT:
1172 case GL_LUMINANCE16UI_EXT:
1173 case GL_LUMINANCE_ALPHA16UI_EXT:
1174 case GL_RGBA8UI_EXT:
1175 case GL_RGB8UI_EXT:
1176 case GL_RG8UI:
1177 case GL_R8UI:
1178 case GL_ALPHA8UI_EXT:
1179 case GL_INTENSITY8UI_EXT:
1180 case GL_LUMINANCE8UI_EXT:
1181 case GL_LUMINANCE_ALPHA8UI_EXT:
1182 case GL_RGBA32I_EXT:
1183 case GL_RGB32I_EXT:
1184 case GL_RG32I:
1185 case GL_R32I:
1186 case GL_ALPHA32I_EXT:
1187 case GL_INTENSITY32I_EXT:
1188 case GL_LUMINANCE32I_EXT:
1189 case GL_LUMINANCE_ALPHA32I_EXT:
1190 case GL_RGBA16I_EXT:
1191 case GL_RGB16I_EXT:
1192 case GL_RG16I:
1193 case GL_R16I:
1194 case GL_ALPHA16I_EXT:
1195 case GL_INTENSITY16I_EXT:
1196 case GL_LUMINANCE16I_EXT:
1197 case GL_LUMINANCE_ALPHA16I_EXT:
1198 case GL_RGBA8I_EXT:
1199 case GL_RGB8I_EXT:
1200 case GL_RG8I:
1201 case GL_R8I:
1202 case GL_ALPHA8I_EXT:
1203 case GL_INTENSITY8I_EXT:
1204 case GL_LUMINANCE8I_EXT:
1205 case GL_LUMINANCE_ALPHA8I_EXT:
1206 /* signed, normalized texture formats */
1207 case GL_RED_SNORM:
1208 case GL_R8_SNORM:
1209 case GL_R16_SNORM:
1210 case GL_RG_SNORM:
1211 case GL_RG8_SNORM:
1212 case GL_RG16_SNORM:
1213 case GL_RGB_SNORM:
1214 case GL_RGB8_SNORM:
1215 case GL_RGB16_SNORM:
1216 case GL_RGBA_SNORM:
1217 case GL_RGBA8_SNORM:
1218 case GL_RGBA16_SNORM:
1219 case GL_ALPHA_SNORM:
1220 case GL_ALPHA8_SNORM:
1221 case GL_ALPHA16_SNORM:
1222 case GL_LUMINANCE_SNORM:
1223 case GL_LUMINANCE8_SNORM:
1224 case GL_LUMINANCE16_SNORM:
1225 case GL_LUMINANCE_ALPHA_SNORM:
1226 case GL_LUMINANCE8_ALPHA8_SNORM:
1227 case GL_LUMINANCE16_ALPHA16_SNORM:
1228 case GL_INTENSITY_SNORM:
1229 case GL_INTENSITY8_SNORM:
1230 case GL_INTENSITY16_SNORM:
1231 case GL_RGB9_E5:
1232 case GL_R11F_G11F_B10F:
1233 case GL_RGB10_A2UI:
1234 return GL_TRUE;
1235 case GL_YCBCR_MESA: /* not considered to be RGB */
1236 /* fall-through */
1237 default:
1238 return GL_FALSE;
1239 }
1240 }
1241
1242
1243 /**
1244 * Test if the given image format is a depth component format.
1245 */
1246 GLboolean
1247 _mesa_is_depth_format(GLenum format)
1248 {
1249 switch (format) {
1250 case GL_DEPTH_COMPONENT:
1251 case GL_DEPTH_COMPONENT16:
1252 case GL_DEPTH_COMPONENT24:
1253 case GL_DEPTH_COMPONENT32:
1254 case GL_DEPTH_COMPONENT32F:
1255 return GL_TRUE;
1256 default:
1257 return GL_FALSE;
1258 }
1259 }
1260
1261
1262 /**
1263 * Test if the given image format is a stencil format.
1264 */
1265 GLboolean
1266 _mesa_is_stencil_format(GLenum format)
1267 {
1268 switch (format) {
1269 case GL_STENCIL_INDEX:
1270 return GL_TRUE;
1271 default:
1272 return GL_FALSE;
1273 }
1274 }
1275
1276
1277 /**
1278 * Test if the given image format is a YCbCr format.
1279 */
1280 GLboolean
1281 _mesa_is_ycbcr_format(GLenum format)
1282 {
1283 switch (format) {
1284 case GL_YCBCR_MESA:
1285 return GL_TRUE;
1286 default:
1287 return GL_FALSE;
1288 }
1289 }
1290
1291
1292 /**
1293 * Test if the given image format is a depth+stencil format.
1294 */
1295 GLboolean
1296 _mesa_is_depthstencil_format(GLenum format)
1297 {
1298 switch (format) {
1299 case GL_DEPTH24_STENCIL8_EXT:
1300 case GL_DEPTH_STENCIL_EXT:
1301 case GL_DEPTH32F_STENCIL8:
1302 return GL_TRUE;
1303 default:
1304 return GL_FALSE;
1305 }
1306 }
1307
1308
1309 /**
1310 * Test if the given image format is a depth or stencil format.
1311 */
1312 GLboolean
1313 _mesa_is_depth_or_stencil_format(GLenum format)
1314 {
1315 switch (format) {
1316 case GL_DEPTH_COMPONENT:
1317 case GL_DEPTH_COMPONENT16:
1318 case GL_DEPTH_COMPONENT24:
1319 case GL_DEPTH_COMPONENT32:
1320 case GL_STENCIL_INDEX:
1321 case GL_STENCIL_INDEX1_EXT:
1322 case GL_STENCIL_INDEX4_EXT:
1323 case GL_STENCIL_INDEX8_EXT:
1324 case GL_STENCIL_INDEX16_EXT:
1325 case GL_DEPTH_STENCIL_EXT:
1326 case GL_DEPTH24_STENCIL8_EXT:
1327 case GL_DEPTH_COMPONENT32F:
1328 case GL_DEPTH32F_STENCIL8:
1329 return GL_TRUE;
1330 default:
1331 return GL_FALSE;
1332 }
1333 }
1334
1335
1336 /**
1337 * Test if an image format is a supported compressed format.
1338 * \param format the internal format token provided by the user.
1339 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1340 */
1341 GLboolean
1342 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1343 {
1344 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1345
1346 /* Some formats in this switch have an equivalent mesa_format_layout
1347 * to the compressed formats in the layout switch below and thus
1348 * must be handled first.
1349 */
1350 switch (format) {
1351 case GL_RGB_S3TC:
1352 case GL_RGB4_S3TC:
1353 case GL_RGBA_S3TC:
1354 case GL_RGBA4_S3TC:
1355 return _mesa_has_S3_s3tc(ctx);
1356 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1357 return ctx->API == API_OPENGL_COMPAT
1358 && ctx->Extensions.ATI_texture_compression_3dc;
1359 case GL_PALETTE4_RGB8_OES:
1360 case GL_PALETTE4_RGBA8_OES:
1361 case GL_PALETTE4_R5_G6_B5_OES:
1362 case GL_PALETTE4_RGBA4_OES:
1363 case GL_PALETTE4_RGB5_A1_OES:
1364 case GL_PALETTE8_RGB8_OES:
1365 case GL_PALETTE8_RGBA8_OES:
1366 case GL_PALETTE8_R5_G6_B5_OES:
1367 case GL_PALETTE8_RGBA4_OES:
1368 case GL_PALETTE8_RGB5_A1_OES:
1369 return ctx->API == API_OPENGLES;
1370 }
1371
1372 switch (_mesa_get_format_layout(m_format)) {
1373 case MESA_FORMAT_LAYOUT_S3TC:
1374 if (_mesa_get_format_color_encoding(m_format) == GL_LINEAR) {
1375 /* Assume that the ANGLE flag will always be set if the
1376 * EXT flag is set.
1377 */
1378 return ctx->Extensions.ANGLE_texture_compression_dxt;
1379 } else {
1380 return _mesa_has_EXT_texture_sRGB(ctx) &&
1381 _mesa_has_EXT_texture_compression_s3tc(ctx);
1382 }
1383 case MESA_FORMAT_LAYOUT_FXT1:
1384 return _mesa_is_desktop_gl(ctx)
1385 && ctx->Extensions.TDFX_texture_compression_FXT1;
1386 case MESA_FORMAT_LAYOUT_RGTC:
1387 return _mesa_is_desktop_gl(ctx)
1388 && ctx->Extensions.ARB_texture_compression_rgtc;
1389 case MESA_FORMAT_LAYOUT_LATC:
1390 return ctx->API == API_OPENGL_COMPAT
1391 && ctx->Extensions.EXT_texture_compression_latc;
1392 case MESA_FORMAT_LAYOUT_ETC1:
1393 return _mesa_is_gles(ctx)
1394 && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
1395 case MESA_FORMAT_LAYOUT_ETC2:
1396 return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
1397 case MESA_FORMAT_LAYOUT_BPTC:
1398 return _mesa_is_desktop_gl(ctx) &&
1399 ctx->Extensions.ARB_texture_compression_bptc;
1400 case MESA_FORMAT_LAYOUT_ASTC:
1401 return ctx->Extensions.KHR_texture_compression_astc_ldr;
1402 default:
1403 return GL_FALSE;
1404 }
1405 }
1406
1407 /**
1408 * Test if the given format represents an sRGB format.
1409 * \param format the GL format (can be an internal format)
1410 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1411 */
1412 GLboolean
1413 _mesa_is_srgb_format(GLenum format)
1414 {
1415 switch (format) {
1416 case GL_SRGB:
1417 case GL_SRGB8:
1418 case GL_SRGB_ALPHA:
1419 case GL_SRGB8_ALPHA8:
1420 case GL_COMPRESSED_SRGB:
1421 case GL_COMPRESSED_SRGB_ALPHA:
1422 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1423 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1424 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1425 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1426 case GL_COMPRESSED_SRGB8_ETC2:
1427 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1428 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1429 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1430 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1431 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1432 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1433 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1434 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1435 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1436 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1437 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1438 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1439 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1440 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1441 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1442 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1443 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1444 return GL_TRUE;
1445 default:
1446 break;
1447 }
1448
1449 return GL_FALSE;
1450 }
1451
1452 /**
1453 * Convert various unpack formats to the corresponding base format.
1454 */
1455 GLenum
1456 _mesa_unpack_format_to_base_format(GLenum format)
1457 {
1458 switch(format) {
1459 case GL_RED_INTEGER:
1460 return GL_RED;
1461 case GL_GREEN_INTEGER:
1462 return GL_GREEN;
1463 case GL_BLUE_INTEGER:
1464 return GL_BLUE;
1465 case GL_ALPHA_INTEGER:
1466 return GL_ALPHA;
1467 case GL_RG_INTEGER:
1468 return GL_RG;
1469 case GL_RGB_INTEGER:
1470 return GL_RGB;
1471 case GL_RGBA_INTEGER:
1472 return GL_RGBA;
1473 case GL_BGR_INTEGER:
1474 return GL_BGR;
1475 case GL_BGRA_INTEGER:
1476 return GL_BGRA;
1477 case GL_LUMINANCE_INTEGER_EXT:
1478 return GL_LUMINANCE;
1479 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1480 return GL_LUMINANCE_ALPHA;
1481 case GL_RED:
1482 case GL_GREEN:
1483 case GL_BLUE:
1484 case GL_RG:
1485 case GL_RGB:
1486 case GL_RGBA:
1487 case GL_BGR:
1488 case GL_BGRA:
1489 case GL_ALPHA:
1490 case GL_LUMINANCE:
1491 case GL_LUMINANCE_ALPHA:
1492 default:
1493 return format;
1494 }
1495 }
1496
1497 /**
1498 * Convert various base formats to the corresponding integer format.
1499 */
1500 GLenum
1501 _mesa_base_format_to_integer_format(GLenum format)
1502 {
1503 switch(format) {
1504 case GL_RED:
1505 return GL_RED_INTEGER;
1506 case GL_GREEN:
1507 return GL_GREEN_INTEGER;
1508 case GL_BLUE:
1509 return GL_BLUE_INTEGER;
1510 case GL_RG:
1511 return GL_RG_INTEGER;
1512 case GL_RGB:
1513 return GL_RGB_INTEGER;
1514 case GL_RGBA:
1515 return GL_RGBA_INTEGER;
1516 case GL_BGR:
1517 return GL_BGR_INTEGER;
1518 case GL_BGRA:
1519 return GL_BGRA_INTEGER;
1520 case GL_ALPHA:
1521 return GL_ALPHA_INTEGER;
1522 case GL_LUMINANCE:
1523 return GL_LUMINANCE_INTEGER_EXT;
1524 case GL_LUMINANCE_ALPHA:
1525 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1526 }
1527
1528 return format;
1529 }
1530
1531
1532 /**
1533 * Does the given base texture/renderbuffer format have the channel
1534 * named by 'pname'?
1535 */
1536 GLboolean
1537 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1538 {
1539 switch (pname) {
1540 case GL_TEXTURE_RED_SIZE:
1541 case GL_TEXTURE_RED_TYPE:
1542 case GL_RENDERBUFFER_RED_SIZE_EXT:
1543 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1544 case GL_INTERNALFORMAT_RED_SIZE:
1545 case GL_INTERNALFORMAT_RED_TYPE:
1546 if (base_format == GL_RED ||
1547 base_format == GL_RG ||
1548 base_format == GL_RGB ||
1549 base_format == GL_RGBA) {
1550 return GL_TRUE;
1551 }
1552 return GL_FALSE;
1553 case GL_TEXTURE_GREEN_SIZE:
1554 case GL_TEXTURE_GREEN_TYPE:
1555 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1556 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1557 case GL_INTERNALFORMAT_GREEN_SIZE:
1558 case GL_INTERNALFORMAT_GREEN_TYPE:
1559 if (base_format == GL_RG ||
1560 base_format == GL_RGB ||
1561 base_format == GL_RGBA) {
1562 return GL_TRUE;
1563 }
1564 return GL_FALSE;
1565 case GL_TEXTURE_BLUE_SIZE:
1566 case GL_TEXTURE_BLUE_TYPE:
1567 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1568 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1569 case GL_INTERNALFORMAT_BLUE_SIZE:
1570 case GL_INTERNALFORMAT_BLUE_TYPE:
1571 if (base_format == GL_RGB ||
1572 base_format == GL_RGBA) {
1573 return GL_TRUE;
1574 }
1575 return GL_FALSE;
1576 case GL_TEXTURE_ALPHA_SIZE:
1577 case GL_TEXTURE_ALPHA_TYPE:
1578 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1579 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1580 case GL_INTERNALFORMAT_ALPHA_SIZE:
1581 case GL_INTERNALFORMAT_ALPHA_TYPE:
1582 if (base_format == GL_RGBA ||
1583 base_format == GL_ALPHA ||
1584 base_format == GL_LUMINANCE_ALPHA) {
1585 return GL_TRUE;
1586 }
1587 return GL_FALSE;
1588 case GL_TEXTURE_LUMINANCE_SIZE:
1589 case GL_TEXTURE_LUMINANCE_TYPE:
1590 if (base_format == GL_LUMINANCE ||
1591 base_format == GL_LUMINANCE_ALPHA) {
1592 return GL_TRUE;
1593 }
1594 return GL_FALSE;
1595 case GL_TEXTURE_INTENSITY_SIZE:
1596 case GL_TEXTURE_INTENSITY_TYPE:
1597 if (base_format == GL_INTENSITY) {
1598 return GL_TRUE;
1599 }
1600 return GL_FALSE;
1601 case GL_TEXTURE_DEPTH_SIZE:
1602 case GL_TEXTURE_DEPTH_TYPE:
1603 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1604 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1605 case GL_INTERNALFORMAT_DEPTH_SIZE:
1606 case GL_INTERNALFORMAT_DEPTH_TYPE:
1607 if (base_format == GL_DEPTH_STENCIL ||
1608 base_format == GL_DEPTH_COMPONENT) {
1609 return GL_TRUE;
1610 }
1611 return GL_FALSE;
1612 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1613 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1614 case GL_INTERNALFORMAT_STENCIL_SIZE:
1615 case GL_INTERNALFORMAT_STENCIL_TYPE:
1616 if (base_format == GL_DEPTH_STENCIL ||
1617 base_format == GL_STENCIL_INDEX) {
1618 return GL_TRUE;
1619 }
1620 return GL_FALSE;
1621 default:
1622 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1623 __func__, pname);
1624 return GL_FALSE;
1625 }
1626
1627 return GL_FALSE;
1628 }
1629
1630
1631 /**
1632 * If format is a generic compressed format, return the corresponding
1633 * non-compressed format. For other formats, return the format as-is.
1634 */
1635 GLenum
1636 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1637 {
1638 switch (format) {
1639 case GL_COMPRESSED_RED:
1640 return GL_RED;
1641 case GL_COMPRESSED_RG:
1642 return GL_RG;
1643 case GL_COMPRESSED_RGB:
1644 return GL_RGB;
1645 case GL_COMPRESSED_RGBA:
1646 return GL_RGBA;
1647 case GL_COMPRESSED_ALPHA:
1648 return GL_ALPHA;
1649 case GL_COMPRESSED_LUMINANCE:
1650 return GL_LUMINANCE;
1651 case GL_COMPRESSED_LUMINANCE_ALPHA:
1652 return GL_LUMINANCE_ALPHA;
1653 case GL_COMPRESSED_INTENSITY:
1654 return GL_INTENSITY;
1655 /* sRGB formats */
1656 case GL_COMPRESSED_SRGB:
1657 return GL_SRGB;
1658 case GL_COMPRESSED_SRGB_ALPHA:
1659 return GL_SRGB_ALPHA;
1660 case GL_COMPRESSED_SLUMINANCE:
1661 return GL_SLUMINANCE;
1662 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1663 return GL_SLUMINANCE_ALPHA;
1664 default:
1665 return format;
1666 }
1667 }
1668
1669
1670 /**
1671 * Return the equivalent non-generic internal format.
1672 * This is useful for comparing whether two internal formats are equivalent.
1673 */
1674 GLenum
1675 _mesa_get_nongeneric_internalformat(GLenum format)
1676 {
1677 switch (format) {
1678 /* GL 1.1 formats. */
1679 case 4:
1680 case GL_RGBA:
1681 return GL_RGBA8;
1682 case 3:
1683 case GL_RGB:
1684 return GL_RGB8;
1685 case 2:
1686 case GL_LUMINANCE_ALPHA:
1687 return GL_LUMINANCE8_ALPHA8;
1688 case 1:
1689 case GL_LUMINANCE:
1690 return GL_LUMINANCE8;
1691 case GL_ALPHA:
1692 return GL_ALPHA8;
1693 case GL_INTENSITY:
1694 return GL_INTENSITY8;
1695
1696 /* GL_ARB_texture_rg */
1697 case GL_RED:
1698 return GL_R8;
1699 case GL_RG:
1700 return GL_RG8;
1701
1702 /* GL_EXT_texture_sRGB */
1703 case GL_SRGB:
1704 return GL_SRGB8;
1705 case GL_SRGB_ALPHA:
1706 return GL_SRGB8_ALPHA8;
1707 case GL_SLUMINANCE:
1708 return GL_SLUMINANCE8;
1709 case GL_SLUMINANCE_ALPHA:
1710 return GL_SLUMINANCE8_ALPHA8;
1711
1712 /* GL_EXT_texture_snorm */
1713 case GL_RGBA_SNORM:
1714 return GL_RGBA8_SNORM;
1715 case GL_RGB_SNORM:
1716 return GL_RGB8_SNORM;
1717 case GL_RG_SNORM:
1718 return GL_RG8_SNORM;
1719 case GL_RED_SNORM:
1720 return GL_R8_SNORM;
1721 case GL_LUMINANCE_ALPHA_SNORM:
1722 return GL_LUMINANCE8_ALPHA8_SNORM;
1723 case GL_LUMINANCE_SNORM:
1724 return GL_LUMINANCE8_SNORM;
1725 case GL_ALPHA_SNORM:
1726 return GL_ALPHA8_SNORM;
1727 case GL_INTENSITY_SNORM:
1728 return GL_INTENSITY8_SNORM;
1729
1730 default:
1731 return format;
1732 }
1733 }
1734
1735
1736 /**
1737 * Convert an sRGB internal format to linear.
1738 */
1739 GLenum
1740 _mesa_get_linear_internalformat(GLenum format)
1741 {
1742 switch (format) {
1743 case GL_SRGB:
1744 return GL_RGB;
1745 case GL_SRGB_ALPHA:
1746 return GL_RGBA;
1747 case GL_SRGB8:
1748 return GL_RGB8;
1749 case GL_SRGB8_ALPHA8:
1750 return GL_RGBA8;
1751 case GL_SLUMINANCE8:
1752 return GL_LUMINANCE8;
1753 case GL_SLUMINANCE:
1754 return GL_LUMINANCE;
1755 case GL_SLUMINANCE_ALPHA:
1756 return GL_LUMINANCE_ALPHA;
1757 case GL_SLUMINANCE8_ALPHA8:
1758 return GL_LUMINANCE8_ALPHA8;
1759 default:
1760 return format;
1761 }
1762 }
1763
1764
1765 /**
1766 * Do error checking of format/type combinations for glReadPixels,
1767 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1768 * and type values, we may either generate GL_INVALID_OPERATION or
1769 * GL_INVALID_ENUM.
1770 *
1771 * \param format pixel format.
1772 * \param type pixel type.
1773 *
1774 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1775 */
1776 GLenum
1777 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1778 GLenum format, GLenum type)
1779 {
1780 /* From OpenGL 3.3 spec, page 220:
1781 * "If the format is DEPTH_STENCIL, then values are taken from
1782 * both the depth buffer and the stencil buffer. If there is no
1783 * depth buffer or if there is no stencil buffer, then the error
1784 * INVALID_OPERATION occurs. If the type parameter is not
1785 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1786 * error INVALID_ENUM occurs."
1787 *
1788 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1789 * cannot be used to read depth or stencil in that API.
1790 */
1791 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1792 && type != GL_UNSIGNED_INT_24_8
1793 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1794 return GL_INVALID_ENUM;
1795
1796 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1797 switch (type) {
1798 case GL_BITMAP:
1799 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1800 return GL_INVALID_ENUM;
1801 }
1802 break;
1803
1804 case GL_UNSIGNED_BYTE_3_3_2:
1805 case GL_UNSIGNED_BYTE_2_3_3_REV:
1806 case GL_UNSIGNED_SHORT_5_6_5:
1807 case GL_UNSIGNED_SHORT_5_6_5_REV:
1808 if (format == GL_RGB) {
1809 break; /* OK */
1810 }
1811 if (format == GL_RGB_INTEGER_EXT &&
1812 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1813 break; /* OK */
1814 }
1815 return GL_INVALID_OPERATION;
1816
1817 case GL_UNSIGNED_SHORT_4_4_4_4:
1818 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1819 case GL_UNSIGNED_INT_8_8_8_8:
1820 case GL_UNSIGNED_INT_8_8_8_8_REV:
1821 if (format == GL_RGBA ||
1822 format == GL_BGRA ||
1823 format == GL_ABGR_EXT) {
1824 break; /* OK */
1825 }
1826 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1827 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1828 break; /* OK */
1829 }
1830 return GL_INVALID_OPERATION;
1831
1832 case GL_UNSIGNED_SHORT_5_5_5_1:
1833 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1834 case GL_UNSIGNED_INT_10_10_10_2:
1835 case GL_UNSIGNED_INT_2_10_10_10_REV:
1836 if (format == GL_RGBA ||
1837 format == GL_BGRA) {
1838 break; /* OK */
1839 }
1840 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1841 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1842 break; /* OK */
1843 }
1844 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1845 ctx->API == API_OPENGLES2) {
1846 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1847 }
1848 return GL_INVALID_OPERATION;
1849
1850 case GL_UNSIGNED_INT_24_8:
1851 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1852 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1853 return GL_NO_ERROR;
1854
1855 if (format != GL_DEPTH_STENCIL) {
1856 return GL_INVALID_OPERATION;
1857 }
1858 return GL_NO_ERROR;
1859
1860 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1861 if (!ctx->Extensions.ARB_depth_buffer_float) {
1862 return GL_INVALID_ENUM;
1863 }
1864 if (format != GL_DEPTH_STENCIL) {
1865 return GL_INVALID_OPERATION;
1866 }
1867 return GL_NO_ERROR;
1868
1869 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1870 if (!ctx->Extensions.EXT_packed_float) {
1871 return GL_INVALID_ENUM;
1872 }
1873 if (format != GL_RGB) {
1874 return GL_INVALID_OPERATION;
1875 }
1876 return GL_NO_ERROR;
1877
1878 case GL_HALF_FLOAT_OES:
1879 switch (format) {
1880 case GL_RGBA:
1881 case GL_RGB:
1882 case GL_LUMINANCE_ALPHA:
1883 case GL_LUMINANCE:
1884 case GL_ALPHA:
1885 return GL_NO_ERROR;
1886 case GL_RG:
1887 case GL_RED:
1888 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1889 return GL_NO_ERROR;
1890 default:
1891 return GL_INVALID_OPERATION;
1892 }
1893
1894 default:
1895 ; /* fall-through */
1896 }
1897
1898 /* now, for each format, check the type for compatibility */
1899 switch (format) {
1900 case GL_COLOR_INDEX:
1901 case GL_STENCIL_INDEX:
1902 switch (type) {
1903 case GL_BITMAP:
1904 case GL_BYTE:
1905 case GL_UNSIGNED_BYTE:
1906 case GL_SHORT:
1907 case GL_UNSIGNED_SHORT:
1908 case GL_INT:
1909 case GL_UNSIGNED_INT:
1910 case GL_FLOAT:
1911 case GL_HALF_FLOAT:
1912 return GL_NO_ERROR;
1913 default:
1914 return GL_INVALID_ENUM;
1915 }
1916
1917 case GL_RED:
1918 case GL_GREEN:
1919 case GL_BLUE:
1920 case GL_ALPHA:
1921 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1922 case GL_INTENSITY:
1923 #endif
1924 case GL_LUMINANCE:
1925 case GL_LUMINANCE_ALPHA:
1926 case GL_DEPTH_COMPONENT:
1927 switch (type) {
1928 case GL_BYTE:
1929 case GL_UNSIGNED_BYTE:
1930 case GL_SHORT:
1931 case GL_UNSIGNED_SHORT:
1932 case GL_INT:
1933 case GL_UNSIGNED_INT:
1934 case GL_FLOAT:
1935 case GL_HALF_FLOAT:
1936 return GL_NO_ERROR;
1937 default:
1938 return GL_INVALID_ENUM;
1939 }
1940
1941 case GL_RG:
1942 if (!ctx->Extensions.ARB_texture_rg)
1943 return GL_INVALID_ENUM;
1944 switch (type) {
1945 case GL_BYTE:
1946 case GL_UNSIGNED_BYTE:
1947 case GL_SHORT:
1948 case GL_UNSIGNED_SHORT:
1949 case GL_INT:
1950 case GL_UNSIGNED_INT:
1951 case GL_FLOAT:
1952 case GL_HALF_FLOAT:
1953 return GL_NO_ERROR;
1954 default:
1955 return GL_INVALID_ENUM;
1956 }
1957
1958 case GL_RGB:
1959 switch (type) {
1960 case GL_BYTE:
1961 case GL_UNSIGNED_BYTE:
1962 case GL_SHORT:
1963 case GL_UNSIGNED_SHORT:
1964 case GL_INT:
1965 case GL_UNSIGNED_INT:
1966 case GL_FLOAT:
1967 case GL_UNSIGNED_BYTE_3_3_2:
1968 case GL_UNSIGNED_BYTE_2_3_3_REV:
1969 case GL_UNSIGNED_SHORT_5_6_5:
1970 case GL_UNSIGNED_SHORT_5_6_5_REV:
1971 case GL_HALF_FLOAT:
1972 return GL_NO_ERROR;
1973 case GL_UNSIGNED_INT_2_10_10_10_REV:
1974 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1975 return (ctx->API == API_OPENGLES2)
1976 ? GL_NO_ERROR : GL_INVALID_ENUM;
1977 case GL_UNSIGNED_INT_5_9_9_9_REV:
1978 return ctx->Extensions.EXT_texture_shared_exponent
1979 ? GL_NO_ERROR : GL_INVALID_ENUM;
1980 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1981 return ctx->Extensions.EXT_packed_float
1982 ? GL_NO_ERROR : GL_INVALID_ENUM;
1983 default:
1984 return GL_INVALID_ENUM;
1985 }
1986
1987 case GL_BGR:
1988 switch (type) {
1989 /* NOTE: no packed types are supported with BGR. That's
1990 * intentional, according to the GL spec.
1991 */
1992 case GL_BYTE:
1993 case GL_UNSIGNED_BYTE:
1994 case GL_SHORT:
1995 case GL_UNSIGNED_SHORT:
1996 case GL_INT:
1997 case GL_UNSIGNED_INT:
1998 case GL_FLOAT:
1999 case GL_HALF_FLOAT:
2000 return GL_NO_ERROR;
2001 default:
2002 return GL_INVALID_ENUM;
2003 }
2004
2005 case GL_RGBA:
2006 case GL_BGRA:
2007 switch (type) {
2008 case GL_BYTE:
2009 case GL_UNSIGNED_BYTE:
2010 case GL_SHORT:
2011 case GL_UNSIGNED_SHORT:
2012 case GL_INT:
2013 case GL_UNSIGNED_INT:
2014 case GL_FLOAT:
2015 case GL_UNSIGNED_SHORT_4_4_4_4:
2016 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2017 case GL_UNSIGNED_SHORT_5_5_5_1:
2018 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2019 case GL_UNSIGNED_INT_8_8_8_8:
2020 case GL_UNSIGNED_INT_8_8_8_8_REV:
2021 case GL_UNSIGNED_INT_10_10_10_2:
2022 case GL_UNSIGNED_INT_2_10_10_10_REV:
2023 case GL_HALF_FLOAT:
2024 return GL_NO_ERROR;
2025 default:
2026 return GL_INVALID_ENUM;
2027 }
2028
2029 case GL_ABGR_EXT:
2030 switch (type) {
2031 case GL_BYTE:
2032 case GL_UNSIGNED_BYTE:
2033 case GL_SHORT:
2034 case GL_UNSIGNED_SHORT:
2035 case GL_INT:
2036 case GL_UNSIGNED_INT:
2037 case GL_FLOAT:
2038 case GL_UNSIGNED_SHORT_4_4_4_4:
2039 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2040 case GL_UNSIGNED_INT_8_8_8_8:
2041 case GL_UNSIGNED_INT_8_8_8_8_REV:
2042 case GL_HALF_FLOAT:
2043 return GL_NO_ERROR;
2044 default:
2045 return GL_INVALID_ENUM;
2046 }
2047
2048 case GL_YCBCR_MESA:
2049 if (!ctx->Extensions.MESA_ycbcr_texture)
2050 return GL_INVALID_ENUM;
2051 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2052 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2053 return GL_NO_ERROR;
2054 else
2055 return GL_INVALID_OPERATION;
2056
2057 case GL_DEPTH_STENCIL:
2058 if (type == GL_UNSIGNED_INT_24_8)
2059 return GL_NO_ERROR;
2060 else if (ctx->Extensions.ARB_depth_buffer_float &&
2061 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2062 return GL_NO_ERROR;
2063 else
2064 return GL_INVALID_ENUM;
2065
2066 /* integer-valued formats */
2067 case GL_RED_INTEGER_EXT:
2068 case GL_GREEN_INTEGER_EXT:
2069 case GL_BLUE_INTEGER_EXT:
2070 case GL_ALPHA_INTEGER_EXT:
2071 case GL_RG_INTEGER:
2072 switch (type) {
2073 case GL_BYTE:
2074 case GL_UNSIGNED_BYTE:
2075 case GL_SHORT:
2076 case GL_UNSIGNED_SHORT:
2077 case GL_INT:
2078 case GL_UNSIGNED_INT:
2079 return _mesa_has_integer_textures(ctx)
2080 ? GL_NO_ERROR : GL_INVALID_ENUM;
2081 default:
2082 return GL_INVALID_ENUM;
2083 }
2084
2085 case GL_RGB_INTEGER_EXT:
2086 switch (type) {
2087 case GL_BYTE:
2088 case GL_UNSIGNED_BYTE:
2089 case GL_SHORT:
2090 case GL_UNSIGNED_SHORT:
2091 case GL_INT:
2092 case GL_UNSIGNED_INT:
2093 return _mesa_has_integer_textures(ctx)
2094 ? GL_NO_ERROR : GL_INVALID_ENUM;
2095 case GL_UNSIGNED_BYTE_3_3_2:
2096 case GL_UNSIGNED_BYTE_2_3_3_REV:
2097 case GL_UNSIGNED_SHORT_5_6_5:
2098 case GL_UNSIGNED_SHORT_5_6_5_REV:
2099 return ctx->Extensions.ARB_texture_rgb10_a2ui
2100 ? GL_NO_ERROR : GL_INVALID_ENUM;
2101 default:
2102 return GL_INVALID_ENUM;
2103 }
2104
2105 case GL_BGR_INTEGER_EXT:
2106 switch (type) {
2107 case GL_BYTE:
2108 case GL_UNSIGNED_BYTE:
2109 case GL_SHORT:
2110 case GL_UNSIGNED_SHORT:
2111 case GL_INT:
2112 case GL_UNSIGNED_INT:
2113 /* NOTE: no packed formats w/ BGR format */
2114 return _mesa_has_integer_textures(ctx)
2115 ? GL_NO_ERROR : GL_INVALID_ENUM;
2116 default:
2117 return GL_INVALID_ENUM;
2118 }
2119
2120 case GL_RGBA_INTEGER_EXT:
2121 case GL_BGRA_INTEGER_EXT:
2122 switch (type) {
2123 case GL_BYTE:
2124 case GL_UNSIGNED_BYTE:
2125 case GL_SHORT:
2126 case GL_UNSIGNED_SHORT:
2127 case GL_INT:
2128 case GL_UNSIGNED_INT:
2129 return _mesa_has_integer_textures(ctx)
2130 ? GL_NO_ERROR : GL_INVALID_ENUM;
2131 case GL_UNSIGNED_SHORT_4_4_4_4:
2132 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2133 case GL_UNSIGNED_SHORT_5_5_5_1:
2134 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2135 case GL_UNSIGNED_INT_8_8_8_8:
2136 case GL_UNSIGNED_INT_8_8_8_8_REV:
2137 case GL_UNSIGNED_INT_10_10_10_2:
2138 case GL_UNSIGNED_INT_2_10_10_10_REV:
2139 return ctx->Extensions.ARB_texture_rgb10_a2ui
2140 ? GL_NO_ERROR : GL_INVALID_ENUM;
2141 default:
2142 return GL_INVALID_ENUM;
2143 }
2144
2145 case GL_LUMINANCE_INTEGER_EXT:
2146 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2147 switch (type) {
2148 case GL_BYTE:
2149 case GL_UNSIGNED_BYTE:
2150 case GL_SHORT:
2151 case GL_UNSIGNED_SHORT:
2152 case GL_INT:
2153 case GL_UNSIGNED_INT:
2154 return ctx->Extensions.EXT_texture_integer
2155 ? GL_NO_ERROR : GL_INVALID_ENUM;
2156 default:
2157 return GL_INVALID_ENUM;
2158 }
2159
2160 default:
2161 return GL_INVALID_ENUM;
2162 }
2163 return GL_NO_ERROR;
2164 }
2165
2166
2167 /**
2168 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2169 * and glTex[Sub]Image.
2170 * \return error code, or GL_NO_ERROR.
2171 */
2172 GLenum
2173 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2174 GLenum format, GLenum type,
2175 unsigned dimensions)
2176 {
2177 GLboolean type_valid = GL_TRUE;
2178
2179 switch (format) {
2180 case GL_RED:
2181 case GL_RG:
2182 if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_texture_rg)
2183 return GL_INVALID_VALUE;
2184 /* fallthrough */
2185 case GL_ALPHA:
2186 case GL_LUMINANCE:
2187 case GL_LUMINANCE_ALPHA:
2188 type_valid = (type == GL_UNSIGNED_BYTE
2189 || type == GL_FLOAT
2190 || type == GL_HALF_FLOAT_OES);
2191 break;
2192
2193 case GL_RGB:
2194 type_valid = (type == GL_UNSIGNED_BYTE
2195 || type == GL_UNSIGNED_SHORT_5_6_5
2196 || type == GL_FLOAT
2197 || type == GL_HALF_FLOAT_OES);
2198 break;
2199
2200 case GL_RGBA:
2201 type_valid = (type == GL_UNSIGNED_BYTE
2202 || type == GL_UNSIGNED_SHORT_4_4_4_4
2203 || type == GL_UNSIGNED_SHORT_5_5_5_1
2204 || type == GL_FLOAT
2205 || type == GL_HALF_FLOAT_OES
2206 || (ctx->Extensions.EXT_texture_type_2_10_10_10_REV &&
2207 type == GL_UNSIGNED_INT_2_10_10_10_REV));
2208 break;
2209
2210 case GL_DEPTH_COMPONENT:
2211 /* This format is filtered against invalid dimensionalities elsewhere.
2212 */
2213 type_valid = (type == GL_UNSIGNED_SHORT
2214 || type == GL_UNSIGNED_INT);
2215 break;
2216
2217 case GL_DEPTH_STENCIL:
2218 /* This format is filtered against invalid dimensionalities elsewhere.
2219 */
2220 type_valid = (type == GL_UNSIGNED_INT_24_8);
2221 break;
2222
2223 case GL_BGRA_EXT:
2224 type_valid = (type == GL_UNSIGNED_BYTE);
2225
2226 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2227 * the format does not appear to be allowed for 3D textures in OpenGL
2228 * ES.
2229 */
2230 if (dimensions != 2)
2231 return GL_INVALID_VALUE;
2232
2233 break;
2234
2235 default:
2236 return GL_INVALID_VALUE;
2237 }
2238
2239 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2240 }
2241
2242 /**
2243 * Return the simple base format for a given internal texture format.
2244 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2245 *
2246 * \param ctx GL context.
2247 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2248 *
2249 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2250 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2251 *
2252 * This is the format which is used during texture application (i.e. the
2253 * texture format and env mode determine the arithmetic used.
2254 */
2255 GLint
2256 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2257 {
2258 switch (internalFormat) {
2259 case GL_ALPHA:
2260 case GL_ALPHA4:
2261 case GL_ALPHA8:
2262 case GL_ALPHA12:
2263 case GL_ALPHA16:
2264 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2265 case 1:
2266 case GL_LUMINANCE:
2267 case GL_LUMINANCE4:
2268 case GL_LUMINANCE8:
2269 case GL_LUMINANCE12:
2270 case GL_LUMINANCE16:
2271 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2272 case 2:
2273 case GL_LUMINANCE_ALPHA:
2274 case GL_LUMINANCE4_ALPHA4:
2275 case GL_LUMINANCE6_ALPHA2:
2276 case GL_LUMINANCE8_ALPHA8:
2277 case GL_LUMINANCE12_ALPHA4:
2278 case GL_LUMINANCE12_ALPHA12:
2279 case GL_LUMINANCE16_ALPHA16:
2280 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2281 case GL_INTENSITY:
2282 case GL_INTENSITY4:
2283 case GL_INTENSITY8:
2284 case GL_INTENSITY12:
2285 case GL_INTENSITY16:
2286 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2287 case 3:
2288 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2289 case GL_RGB:
2290 case GL_R3_G3_B2:
2291 case GL_RGB4:
2292 case GL_RGB5:
2293 case GL_RGB8:
2294 case GL_RGB10:
2295 case GL_RGB12:
2296 case GL_RGB16:
2297 return GL_RGB;
2298 case 4:
2299 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2300 case GL_RGBA:
2301 case GL_RGBA2:
2302 case GL_RGBA4:
2303 case GL_RGB5_A1:
2304 case GL_RGBA8:
2305 case GL_RGB10_A2:
2306 case GL_RGBA12:
2307 case GL_RGBA16:
2308 return GL_RGBA;
2309 default:
2310 ; /* fallthrough */
2311 }
2312
2313 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2314 */
2315 if (_mesa_is_gles(ctx)) {
2316 switch (internalFormat) {
2317 case GL_BGRA:
2318 return GL_RGBA;
2319 default:
2320 ; /* fallthrough */
2321 }
2322 }
2323
2324 if (_mesa_has_ARB_ES2_compatibility(ctx) || _mesa_is_gles(ctx)) {
2325 switch (internalFormat) {
2326 case GL_RGB565:
2327 return GL_RGB;
2328 default:
2329 ; /* fallthrough */
2330 }
2331 }
2332
2333 if (ctx->Extensions.ARB_depth_texture) {
2334 switch (internalFormat) {
2335 case GL_DEPTH_COMPONENT:
2336 case GL_DEPTH_COMPONENT16:
2337 case GL_DEPTH_COMPONENT24:
2338 case GL_DEPTH_COMPONENT32:
2339 return GL_DEPTH_COMPONENT;
2340 case GL_DEPTH_STENCIL:
2341 case GL_DEPTH24_STENCIL8:
2342 return GL_DEPTH_STENCIL;
2343 default:
2344 ; /* fallthrough */
2345 }
2346 }
2347
2348 if (ctx->Extensions.ARB_texture_stencil8) {
2349 switch (internalFormat) {
2350 case GL_STENCIL_INDEX:
2351 case GL_STENCIL_INDEX1:
2352 case GL_STENCIL_INDEX4:
2353 case GL_STENCIL_INDEX8:
2354 case GL_STENCIL_INDEX16:
2355 return GL_STENCIL_INDEX;
2356 default:
2357 ; /* fallthrough */
2358 }
2359 }
2360
2361 switch (internalFormat) {
2362 case GL_COMPRESSED_ALPHA:
2363 return GL_ALPHA;
2364 case GL_COMPRESSED_LUMINANCE:
2365 return GL_LUMINANCE;
2366 case GL_COMPRESSED_LUMINANCE_ALPHA:
2367 return GL_LUMINANCE_ALPHA;
2368 case GL_COMPRESSED_INTENSITY:
2369 return GL_INTENSITY;
2370 case GL_COMPRESSED_RGB:
2371 return GL_RGB;
2372 case GL_COMPRESSED_RGBA:
2373 return GL_RGBA;
2374 default:
2375 ; /* fallthrough */
2376 }
2377
2378 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2379 GLenum base_compressed =
2380 _mesa_gl_compressed_format_base_format(internalFormat);
2381 if (base_compressed)
2382 return base_compressed;
2383 }
2384
2385 if ((ctx->Extensions.KHR_texture_compression_astc_ldr &&
2386 is_astc_2d_format(internalFormat)) ||
2387 (ctx->Extensions.OES_texture_compression_astc &&
2388 is_astc_3d_format(internalFormat)))
2389 return GL_RGBA;
2390
2391 if (ctx->Extensions.MESA_ycbcr_texture) {
2392 if (internalFormat == GL_YCBCR_MESA)
2393 return GL_YCBCR_MESA;
2394 }
2395
2396 if (ctx->Extensions.ARB_texture_float) {
2397 switch (internalFormat) {
2398 case GL_ALPHA16F_ARB:
2399 case GL_ALPHA32F_ARB:
2400 return GL_ALPHA;
2401 case GL_RGBA16F_ARB:
2402 case GL_RGBA32F_ARB:
2403 return GL_RGBA;
2404 case GL_RGB16F_ARB:
2405 case GL_RGB32F_ARB:
2406 return GL_RGB;
2407 case GL_INTENSITY16F_ARB:
2408 case GL_INTENSITY32F_ARB:
2409 return GL_INTENSITY;
2410 case GL_LUMINANCE16F_ARB:
2411 case GL_LUMINANCE32F_ARB:
2412 return GL_LUMINANCE;
2413 case GL_LUMINANCE_ALPHA16F_ARB:
2414 case GL_LUMINANCE_ALPHA32F_ARB:
2415 return GL_LUMINANCE_ALPHA;
2416 default:
2417 ; /* fallthrough */
2418 }
2419 }
2420
2421 if (ctx->Extensions.EXT_texture_snorm) {
2422 switch (internalFormat) {
2423 case GL_RED_SNORM:
2424 case GL_R8_SNORM:
2425 case GL_R16_SNORM:
2426 return GL_RED;
2427 case GL_RG_SNORM:
2428 case GL_RG8_SNORM:
2429 case GL_RG16_SNORM:
2430 return GL_RG;
2431 case GL_RGB_SNORM:
2432 case GL_RGB8_SNORM:
2433 case GL_RGB16_SNORM:
2434 return GL_RGB;
2435 case GL_RGBA_SNORM:
2436 case GL_RGBA8_SNORM:
2437 case GL_RGBA16_SNORM:
2438 return GL_RGBA;
2439 case GL_ALPHA_SNORM:
2440 case GL_ALPHA8_SNORM:
2441 case GL_ALPHA16_SNORM:
2442 return GL_ALPHA;
2443 case GL_LUMINANCE_SNORM:
2444 case GL_LUMINANCE8_SNORM:
2445 case GL_LUMINANCE16_SNORM:
2446 return GL_LUMINANCE;
2447 case GL_LUMINANCE_ALPHA_SNORM:
2448 case GL_LUMINANCE8_ALPHA8_SNORM:
2449 case GL_LUMINANCE16_ALPHA16_SNORM:
2450 return GL_LUMINANCE_ALPHA;
2451 case GL_INTENSITY_SNORM:
2452 case GL_INTENSITY8_SNORM:
2453 case GL_INTENSITY16_SNORM:
2454 return GL_INTENSITY;
2455 default:
2456 ; /* fallthrough */
2457 }
2458 }
2459
2460 if (ctx->Extensions.EXT_texture_sRGB) {
2461 switch (internalFormat) {
2462 case GL_SRGB_EXT:
2463 case GL_SRGB8_EXT:
2464 case GL_COMPRESSED_SRGB_EXT:
2465 return GL_RGB;
2466 case GL_SRGB_ALPHA_EXT:
2467 case GL_SRGB8_ALPHA8_EXT:
2468 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2469 return GL_RGBA;
2470 case GL_SLUMINANCE_ALPHA_EXT:
2471 case GL_SLUMINANCE8_ALPHA8_EXT:
2472 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2473 return GL_LUMINANCE_ALPHA;
2474 case GL_SLUMINANCE_EXT:
2475 case GL_SLUMINANCE8_EXT:
2476 case GL_COMPRESSED_SLUMINANCE_EXT:
2477 return GL_LUMINANCE;
2478 default:
2479 ; /* fallthrough */
2480 }
2481 }
2482
2483 if (ctx->Extensions.EXT_texture_sRGB_R8) {
2484 switch (internalFormat) {
2485 case GL_SR8_EXT:
2486 return GL_RED;
2487 default:
2488 ; /* fallthrough */
2489 }
2490 }
2491
2492 if (_mesa_has_integer_textures(ctx)) {
2493 switch (internalFormat) {
2494 case GL_RGBA8UI_EXT:
2495 case GL_RGBA16UI_EXT:
2496 case GL_RGBA32UI_EXT:
2497 case GL_RGBA8I_EXT:
2498 case GL_RGBA16I_EXT:
2499 case GL_RGBA32I_EXT:
2500 return GL_RGBA;
2501 case GL_RGB8UI_EXT:
2502 case GL_RGB16UI_EXT:
2503 case GL_RGB32UI_EXT:
2504 case GL_RGB8I_EXT:
2505 case GL_RGB16I_EXT:
2506 case GL_RGB32I_EXT:
2507 return GL_RGB;
2508 }
2509 }
2510
2511 if (ctx->Extensions.ARB_texture_rgb10_a2ui) {
2512 switch (internalFormat) {
2513 case GL_RGB10_A2UI:
2514 return GL_RGBA;
2515 }
2516 }
2517
2518 if (ctx->Extensions.EXT_texture_integer) {
2519 switch (internalFormat) {
2520 case GL_ALPHA8UI_EXT:
2521 case GL_ALPHA16UI_EXT:
2522 case GL_ALPHA32UI_EXT:
2523 case GL_ALPHA8I_EXT:
2524 case GL_ALPHA16I_EXT:
2525 case GL_ALPHA32I_EXT:
2526 return GL_ALPHA;
2527 case GL_INTENSITY8UI_EXT:
2528 case GL_INTENSITY16UI_EXT:
2529 case GL_INTENSITY32UI_EXT:
2530 case GL_INTENSITY8I_EXT:
2531 case GL_INTENSITY16I_EXT:
2532 case GL_INTENSITY32I_EXT:
2533 return GL_INTENSITY;
2534 case GL_LUMINANCE8UI_EXT:
2535 case GL_LUMINANCE16UI_EXT:
2536 case GL_LUMINANCE32UI_EXT:
2537 case GL_LUMINANCE8I_EXT:
2538 case GL_LUMINANCE16I_EXT:
2539 case GL_LUMINANCE32I_EXT:
2540 return GL_LUMINANCE;
2541 case GL_LUMINANCE_ALPHA8UI_EXT:
2542 case GL_LUMINANCE_ALPHA16UI_EXT:
2543 case GL_LUMINANCE_ALPHA32UI_EXT:
2544 case GL_LUMINANCE_ALPHA8I_EXT:
2545 case GL_LUMINANCE_ALPHA16I_EXT:
2546 case GL_LUMINANCE_ALPHA32I_EXT:
2547 return GL_LUMINANCE_ALPHA;
2548 default:
2549 ; /* fallthrough */
2550 }
2551 }
2552
2553 if (ctx->Extensions.ARB_texture_rg) {
2554 switch (internalFormat) {
2555 case GL_R16F:
2556 case GL_R32F:
2557 if (!ctx->Extensions.ARB_texture_float)
2558 break;
2559 return GL_RED;
2560 case GL_R8I:
2561 case GL_R8UI:
2562 case GL_R16I:
2563 case GL_R16UI:
2564 case GL_R32I:
2565 case GL_R32UI:
2566 if (!_mesa_has_integer_textures(ctx))
2567 break;
2568 /* FALLTHROUGH */
2569 case GL_R8:
2570 case GL_R16:
2571 case GL_RED:
2572 case GL_COMPRESSED_RED:
2573 return GL_RED;
2574
2575 case GL_RG16F:
2576 case GL_RG32F:
2577 if (!ctx->Extensions.ARB_texture_float)
2578 break;
2579 return GL_RG;
2580 case GL_RG8I:
2581 case GL_RG8UI:
2582 case GL_RG16I:
2583 case GL_RG16UI:
2584 case GL_RG32I:
2585 case GL_RG32UI:
2586 if (!_mesa_has_integer_textures(ctx))
2587 break;
2588 /* FALLTHROUGH */
2589 case GL_RG:
2590 case GL_RG8:
2591 case GL_RG16:
2592 case GL_COMPRESSED_RG:
2593 return GL_RG;
2594 default:
2595 ; /* fallthrough */
2596 }
2597 }
2598
2599 if (ctx->Extensions.EXT_texture_shared_exponent) {
2600 switch (internalFormat) {
2601 case GL_RGB9_E5_EXT:
2602 return GL_RGB;
2603 default:
2604 ; /* fallthrough */
2605 }
2606 }
2607
2608 if (ctx->Extensions.EXT_packed_float) {
2609 switch (internalFormat) {
2610 case GL_R11F_G11F_B10F_EXT:
2611 return GL_RGB;
2612 default:
2613 ; /* fallthrough */
2614 }
2615 }
2616
2617 if (ctx->Extensions.ARB_depth_buffer_float) {
2618 switch (internalFormat) {
2619 case GL_DEPTH_COMPONENT32F:
2620 return GL_DEPTH_COMPONENT;
2621 case GL_DEPTH32F_STENCIL8:
2622 return GL_DEPTH_STENCIL;
2623 default:
2624 ; /* fallthrough */
2625 }
2626 }
2627
2628 return -1; /* error */
2629 }
2630
2631 /**
2632 * Returns the effective internal format from a texture format and type.
2633 * This is used by texture image operations internally for validation, when
2634 * the specified internal format is a base (unsized) format.
2635 *
2636 * This method will only return a valid effective internal format if the
2637 * combination of format, type and internal format in base form, is acceptable.
2638 *
2639 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2640 * in extensions, to unambiguously correspond to the given base format, then
2641 * that internal format is returned as the effective. Otherwise, if the
2642 * combination is accepted but a single effective format is not defined, the
2643 * passed base format will be returned instead.
2644 *
2645 * \param format the texture format
2646 * \param type the texture type
2647 */
2648 static GLenum
2649 gles_effective_internal_format_for_format_and_type(GLenum format,
2650 GLenum type)
2651 {
2652 switch (type) {
2653 case GL_UNSIGNED_BYTE:
2654 switch (format) {
2655 case GL_RGBA:
2656 return GL_RGBA8;
2657 case GL_RGB:
2658 return GL_RGB8;
2659 case GL_RG:
2660 return GL_RG8;
2661 case GL_RED:
2662 return GL_R8;
2663 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2664 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2665 * internal formats, they do not correspond to GL constants, so the base
2666 * format is returned instead.
2667 */
2668 case GL_BGRA_EXT:
2669 case GL_LUMINANCE_ALPHA:
2670 case GL_LUMINANCE:
2671 case GL_ALPHA:
2672 return format;
2673 }
2674 break;
2675
2676 case GL_UNSIGNED_SHORT_4_4_4_4:
2677 if (format == GL_RGBA)
2678 return GL_RGBA4;
2679 break;
2680
2681 case GL_UNSIGNED_SHORT_5_5_5_1:
2682 if (format == GL_RGBA)
2683 return GL_RGB5_A1;
2684 break;
2685
2686 case GL_UNSIGNED_SHORT_5_6_5:
2687 if (format == GL_RGB)
2688 return GL_RGB565;
2689 break;
2690
2691 /* OES_packed_depth_stencil */
2692 case GL_UNSIGNED_INT_24_8:
2693 if (format == GL_DEPTH_STENCIL)
2694 return GL_DEPTH24_STENCIL8;
2695 break;
2696
2697 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2698 if (format == GL_DEPTH_STENCIL)
2699 return GL_DEPTH32F_STENCIL8;
2700 break;
2701
2702 case GL_UNSIGNED_SHORT:
2703 if (format == GL_DEPTH_COMPONENT)
2704 return GL_DEPTH_COMPONENT16;
2705 break;
2706
2707 case GL_UNSIGNED_INT:
2708 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2709 * the format.
2710 */
2711 if (format == GL_DEPTH_COMPONENT)
2712 return format;
2713 break;
2714
2715 /* OES_texture_float and OES_texture_half_float */
2716 case GL_FLOAT:
2717 if (format == GL_DEPTH_COMPONENT)
2718 return GL_DEPTH_COMPONENT32F;
2719 /* fall through */
2720 case GL_HALF_FLOAT_OES:
2721 switch (format) {
2722 case GL_RGBA:
2723 case GL_RGB:
2724 case GL_LUMINANCE_ALPHA:
2725 case GL_LUMINANCE:
2726 case GL_ALPHA:
2727 case GL_RED:
2728 case GL_RG:
2729 return format;
2730 }
2731 break;
2732 case GL_HALF_FLOAT:
2733 switch (format) {
2734 case GL_RG:
2735 case GL_RED:
2736 return format;
2737 }
2738 break;
2739
2740 /* GL_EXT_texture_type_2_10_10_10_REV */
2741 case GL_UNSIGNED_INT_2_10_10_10_REV:
2742 switch (format) {
2743 case GL_RGBA:
2744 case GL_RGB:
2745 return format;
2746 }
2747 break;
2748
2749 default:
2750 /* fall through and return NONE */
2751 break;
2752 }
2753
2754 return GL_NONE;
2755 }
2756
2757 /**
2758 * Do error checking of format/type combinations for OpenGL ES 3
2759 * glTex[Sub]Image, or ES1/ES2 with GL_OES_required_internalformat.
2760 * \return error code, or GL_NO_ERROR.
2761 */
2762 GLenum
2763 _mesa_gles_error_check_format_and_type(const struct gl_context *ctx,
2764 GLenum format, GLenum type,
2765 GLenum internalFormat)
2766 {
2767 /* If internalFormat is an unsized format, then the effective internal
2768 * format derived from format and type should be used instead. Page 127,
2769 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2770 *
2771 * "if internalformat is a base internal format, the effective
2772 * internal format is a sized internal format that is derived
2773 * from the format and type for internal use by the GL.
2774 * Table 3.12 specifies the mapping of format and type to effective
2775 * internal formats. The effective internal format is used by the GL
2776 * for purposes such as texture completeness or type checks for
2777 * CopyTex* commands. In these cases, the GL is required to operate
2778 * as if the effective internal format was used as the internalformat
2779 * when specifying the texture data."
2780 */
2781 if (_mesa_is_enum_format_unsized(internalFormat)) {
2782 GLenum effectiveInternalFormat =
2783 gles_effective_internal_format_for_format_and_type(format, type);
2784
2785 if (effectiveInternalFormat == GL_NONE)
2786 return GL_INVALID_OPERATION;
2787
2788 GLenum baseInternalFormat;
2789 if (internalFormat == GL_BGRA_EXT) {
2790 /* Unfortunately, _mesa_base_tex_format returns a base format of
2791 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2792 * asking the question, "what channels does this format have?"
2793 * However, if we're trying to determine if two internal formats
2794 * match in the ES3 sense, we actually want GL_BGRA.
2795 */
2796 baseInternalFormat = GL_BGRA_EXT;
2797 } else {
2798 baseInternalFormat =
2799 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2800 }
2801
2802 if (internalFormat != baseInternalFormat)
2803 return GL_INVALID_OPERATION;
2804
2805 internalFormat = effectiveInternalFormat;
2806 }
2807
2808 /* The GLES variant of EXT_texture_compression_s3tc is very vague and
2809 * doesn't list valid types. Just do exactly what the spec says.
2810 */
2811 if (ctx->Extensions.EXT_texture_compression_s3tc &&
2812 (internalFormat == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||
2813 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ||
2814 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT3_EXT ||
2815 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT5_EXT))
2816 return format == GL_RGB || format == GL_RGBA ? GL_NO_ERROR :
2817 GL_INVALID_OPERATION;
2818
2819 switch (format) {
2820 case GL_BGRA_EXT:
2821 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2822 return GL_INVALID_OPERATION;
2823 break;
2824
2825 case GL_RGBA:
2826 switch (type) {
2827 case GL_UNSIGNED_BYTE:
2828 switch (internalFormat) {
2829 case GL_RGBA:
2830 case GL_RGBA8:
2831 case GL_RGB5_A1:
2832 case GL_RGBA4:
2833 break;
2834 case GL_SRGB8_ALPHA8_EXT:
2835 if (ctx->Version <= 20)
2836 return GL_INVALID_OPERATION;
2837 break;
2838 default:
2839 return GL_INVALID_OPERATION;
2840 }
2841 break;
2842
2843 case GL_BYTE:
2844 if (ctx->Version <= 20 || internalFormat != GL_RGBA8_SNORM)
2845 return GL_INVALID_OPERATION;
2846 break;
2847
2848 case GL_UNSIGNED_SHORT:
2849 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGBA16)
2850 return GL_INVALID_OPERATION;
2851 break;
2852
2853 case GL_SHORT:
2854 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2855 internalFormat != GL_RGBA16_SNORM)
2856 return GL_INVALID_OPERATION;
2857 break;
2858
2859 case GL_UNSIGNED_SHORT_4_4_4_4:
2860 switch (internalFormat) {
2861 case GL_RGBA:
2862 case GL_RGBA4:
2863 break;
2864 default:
2865 return GL_INVALID_OPERATION;
2866 }
2867 break;
2868
2869 case GL_UNSIGNED_SHORT_5_5_5_1:
2870 switch (internalFormat) {
2871 case GL_RGBA:
2872 case GL_RGB5_A1:
2873 break;
2874 default:
2875 return GL_INVALID_OPERATION;
2876 }
2877 break;
2878
2879 case GL_UNSIGNED_INT_2_10_10_10_REV:
2880 switch (internalFormat) {
2881 case GL_RGBA:
2882 case GL_RGB10_A2:
2883 case GL_RGB5_A1:
2884 if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
2885 return GL_INVALID_OPERATION;
2886 break;
2887 default:
2888 return GL_INVALID_OPERATION;
2889 }
2890 break;
2891
2892 case GL_HALF_FLOAT:
2893 if (ctx->Version <= 20 || internalFormat != GL_RGBA16F)
2894 return GL_INVALID_OPERATION;
2895 break;
2896
2897 case GL_FLOAT:
2898 switch (internalFormat) {
2899 case GL_RGBA16F:
2900 case GL_RGBA32F:
2901 if (ctx->Version <= 20)
2902 return GL_INVALID_OPERATION;
2903 break;
2904 case GL_RGBA:
2905 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2906 break;
2907 default:
2908 return GL_INVALID_OPERATION;
2909 }
2910 break;
2911
2912 case GL_HALF_FLOAT_OES:
2913 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2914 break;
2915 default:
2916 return GL_INVALID_OPERATION;
2917 }
2918 break;
2919
2920 case GL_RGBA_INTEGER:
2921 if (ctx->Version <= 20)
2922 return GL_INVALID_OPERATION;
2923 switch (type) {
2924 case GL_UNSIGNED_BYTE:
2925 if (internalFormat != GL_RGBA8UI)
2926 return GL_INVALID_OPERATION;
2927 break;
2928
2929 case GL_BYTE:
2930 if (internalFormat != GL_RGBA8I)
2931 return GL_INVALID_OPERATION;
2932 break;
2933
2934 case GL_UNSIGNED_SHORT:
2935 if (internalFormat != GL_RGBA16UI)
2936 return GL_INVALID_OPERATION;
2937 break;
2938
2939 case GL_SHORT:
2940 if (internalFormat != GL_RGBA16I)
2941 return GL_INVALID_OPERATION;
2942 break;
2943
2944 case GL_UNSIGNED_INT:
2945 if (internalFormat != GL_RGBA32UI)
2946 return GL_INVALID_OPERATION;
2947 break;
2948
2949 case GL_INT:
2950 if (internalFormat != GL_RGBA32I)
2951 return GL_INVALID_OPERATION;
2952 break;
2953
2954 case GL_UNSIGNED_INT_2_10_10_10_REV:
2955 if (internalFormat != GL_RGB10_A2UI)
2956 return GL_INVALID_OPERATION;
2957 break;
2958
2959 default:
2960 return GL_INVALID_OPERATION;
2961 }
2962 break;
2963
2964 case GL_RGB:
2965 switch (type) {
2966 case GL_UNSIGNED_BYTE:
2967 switch (internalFormat) {
2968 case GL_RGB:
2969 case GL_RGB8:
2970 case GL_RGB565:
2971 break;
2972 case GL_SRGB8:
2973 if (ctx->Version <= 20)
2974 return GL_INVALID_OPERATION;
2975 break;
2976 default:
2977 return GL_INVALID_OPERATION;
2978 }
2979 break;
2980
2981 case GL_BYTE:
2982 if (ctx->Version <= 20 || internalFormat != GL_RGB8_SNORM)
2983 return GL_INVALID_OPERATION;
2984 break;
2985
2986 case GL_UNSIGNED_SHORT:
2987 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGB16)
2988 return GL_INVALID_OPERATION;
2989 break;
2990
2991 case GL_SHORT:
2992 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2993 internalFormat != GL_RGB16_SNORM)
2994 return GL_INVALID_OPERATION;
2995 break;
2996
2997 case GL_UNSIGNED_SHORT_5_6_5:
2998 switch (internalFormat) {
2999 case GL_RGB:
3000 case GL_RGB565:
3001 break;
3002 default:
3003 return GL_INVALID_OPERATION;
3004 }
3005 break;
3006
3007 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3008 if (ctx->Version <= 20 || internalFormat != GL_R11F_G11F_B10F)
3009 return GL_INVALID_OPERATION;
3010 break;
3011
3012 case GL_UNSIGNED_INT_5_9_9_9_REV:
3013 if (ctx->Version <= 20 || internalFormat != GL_RGB9_E5)
3014 return GL_INVALID_OPERATION;
3015 break;
3016
3017 case GL_HALF_FLOAT:
3018 if (ctx->Version <= 20)
3019 return GL_INVALID_OPERATION;
3020 switch (internalFormat) {
3021 case GL_RGB16F:
3022 case GL_R11F_G11F_B10F:
3023 case GL_RGB9_E5:
3024 break;
3025 default:
3026 return GL_INVALID_OPERATION;
3027 }
3028 break;
3029
3030 case GL_FLOAT:
3031 switch (internalFormat) {
3032 case GL_RGB16F:
3033 case GL_RGB32F:
3034 case GL_R11F_G11F_B10F:
3035 case GL_RGB9_E5:
3036 if (ctx->Version <= 20)
3037 return GL_INVALID_OPERATION;
3038 break;
3039 case GL_RGB:
3040 if (ctx->Extensions.OES_texture_float && internalFormat == format)
3041 break;
3042 default:
3043 return GL_INVALID_OPERATION;
3044 }
3045 break;
3046
3047 case GL_HALF_FLOAT_OES:
3048 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3049 return GL_INVALID_OPERATION;
3050 break;
3051
3052 case GL_UNSIGNED_INT_2_10_10_10_REV:
3053 switch (internalFormat) {
3054 case GL_RGB:
3055 case GL_RGB10:
3056 case GL_RGB8:
3057 case GL_RGB565:
3058 /* GL_EXT_texture_type_2_10_10_10_REV allows GL_RGB even though
3059 * GLES3 doesn't, and GL_OES_required_internalformat extends that
3060 * to allow the sized RGB internalformats as well.
3061 */
3062 if (!ctx->Extensions.EXT_texture_type_2_10_10_10_REV)
3063 return GL_INVALID_OPERATION;
3064 break;
3065 default:
3066 return GL_INVALID_OPERATION;
3067 }
3068 break;
3069
3070 default:
3071 return GL_INVALID_OPERATION;
3072 }
3073 break;
3074
3075 case GL_RGB_INTEGER:
3076 if (ctx->Version <= 20)
3077 return GL_INVALID_OPERATION;
3078 switch (type) {
3079 case GL_UNSIGNED_BYTE:
3080 if (internalFormat != GL_RGB8UI)
3081 return GL_INVALID_OPERATION;
3082 break;
3083
3084 case GL_BYTE:
3085 if (internalFormat != GL_RGB8I)
3086 return GL_INVALID_OPERATION;
3087 break;
3088
3089 case GL_UNSIGNED_SHORT:
3090 if (internalFormat != GL_RGB16UI)
3091 return GL_INVALID_OPERATION;
3092 break;
3093
3094 case GL_SHORT:
3095 if (internalFormat != GL_RGB16I)
3096 return GL_INVALID_OPERATION;
3097 break;
3098
3099 case GL_UNSIGNED_INT:
3100 if (internalFormat != GL_RGB32UI)
3101 return GL_INVALID_OPERATION;
3102 break;
3103
3104 case GL_INT:
3105 if (internalFormat != GL_RGB32I)
3106 return GL_INVALID_OPERATION;
3107 break;
3108
3109 default:
3110 return GL_INVALID_OPERATION;
3111 }
3112 break;
3113
3114 case GL_RG:
3115 if (!ctx->Extensions.ARB_texture_rg)
3116 return GL_INVALID_OPERATION;
3117 switch (type) {
3118 case GL_UNSIGNED_BYTE:
3119 if (internalFormat != GL_RG8)
3120 return GL_INVALID_OPERATION;
3121 break;
3122
3123 case GL_BYTE:
3124 if (internalFormat != GL_RG8_SNORM)
3125 return GL_INVALID_OPERATION;
3126 break;
3127
3128 case GL_UNSIGNED_SHORT:
3129 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RG16)
3130 return GL_INVALID_OPERATION;
3131 break;
3132
3133 case GL_SHORT:
3134 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3135 internalFormat != GL_RG16_SNORM)
3136 return GL_INVALID_OPERATION;
3137 break;
3138
3139 case GL_HALF_FLOAT:
3140 case GL_HALF_FLOAT_OES:
3141 switch (internalFormat) {
3142 case GL_RG16F:
3143 if (ctx->Version <= 20)
3144 return GL_INVALID_OPERATION;
3145 break;
3146 case GL_RG:
3147 if (ctx->Extensions.ARB_texture_rg &&
3148 ctx->Extensions.OES_texture_half_float)
3149 break;
3150 /* fallthrough */
3151 default:
3152 return GL_INVALID_OPERATION;
3153 }
3154 break;
3155
3156 case GL_FLOAT:
3157 switch (internalFormat) {
3158 case GL_RG16F:
3159 case GL_RG32F:
3160 break;
3161 case GL_RG:
3162 if (ctx->Extensions.ARB_texture_rg &&
3163 ctx->Extensions.OES_texture_float)
3164 break;
3165 /* fallthrough */
3166 default:
3167 return GL_INVALID_OPERATION;
3168 }
3169 break;
3170
3171 default:
3172 return GL_INVALID_OPERATION;
3173 }
3174 break;
3175
3176 case GL_RG_INTEGER:
3177 if (ctx->Version <= 20)
3178 return GL_INVALID_OPERATION;
3179 switch (type) {
3180 case GL_UNSIGNED_BYTE:
3181 if (internalFormat != GL_RG8UI)
3182 return GL_INVALID_OPERATION;
3183 break;
3184
3185 case GL_BYTE:
3186 if (internalFormat != GL_RG8I)
3187 return GL_INVALID_OPERATION;
3188 break;
3189
3190 case GL_UNSIGNED_SHORT:
3191 if (internalFormat != GL_RG16UI)
3192 return GL_INVALID_OPERATION;
3193 break;
3194
3195 case GL_SHORT:
3196 if (internalFormat != GL_RG16I)
3197 return GL_INVALID_OPERATION;
3198 break;
3199
3200 case GL_UNSIGNED_INT:
3201 if (internalFormat != GL_RG32UI)
3202 return GL_INVALID_OPERATION;
3203 break;
3204
3205 case GL_INT:
3206 if (internalFormat != GL_RG32I)
3207 return GL_INVALID_OPERATION;
3208 break;
3209
3210 default:
3211 return GL_INVALID_OPERATION;
3212 }
3213 break;
3214
3215 case GL_RED:
3216 if (!ctx->Extensions.ARB_texture_rg)
3217 return GL_INVALID_OPERATION;
3218 switch (type) {
3219 case GL_UNSIGNED_BYTE:
3220 if (internalFormat == GL_R8 ||
3221 ((internalFormat == GL_SR8_EXT) &&
3222 ctx->Extensions.EXT_texture_sRGB_R8))
3223 break;
3224 return GL_INVALID_OPERATION;
3225
3226 case GL_BYTE:
3227 if (internalFormat != GL_R8_SNORM)
3228 return GL_INVALID_OPERATION;
3229 break;
3230
3231 case GL_UNSIGNED_SHORT:
3232 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_R16)
3233 return GL_INVALID_OPERATION;
3234 break;
3235
3236 case GL_SHORT:
3237 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3238 internalFormat != GL_R16_SNORM)
3239 return GL_INVALID_OPERATION;
3240 break;
3241
3242 case GL_HALF_FLOAT:
3243 case GL_HALF_FLOAT_OES:
3244 switch (internalFormat) {
3245 case GL_R16F:
3246 if (ctx->Version <= 20)
3247 return GL_INVALID_OPERATION;
3248 break;
3249 case GL_RG:
3250 case GL_RED:
3251 if (ctx->Extensions.ARB_texture_rg &&
3252 ctx->Extensions.OES_texture_half_float)
3253 break;
3254 /* fallthrough */
3255 default:
3256 return GL_INVALID_OPERATION;
3257 }
3258 break;
3259
3260 case GL_FLOAT:
3261 switch (internalFormat) {
3262 case GL_R16F:
3263 case GL_R32F:
3264 break;
3265 case GL_RED:
3266 if (ctx->Extensions.ARB_texture_rg &&
3267 ctx->Extensions.OES_texture_float)
3268 break;
3269 /* fallthrough */
3270 default:
3271 return GL_INVALID_OPERATION;
3272 }
3273 break;
3274
3275 default:
3276 return GL_INVALID_OPERATION;
3277 }
3278 break;
3279
3280 case GL_RED_INTEGER:
3281 if (ctx->Version <= 20)
3282 return GL_INVALID_OPERATION;
3283 switch (type) {
3284 case GL_UNSIGNED_BYTE:
3285 if (internalFormat != GL_R8UI)
3286 return GL_INVALID_OPERATION;
3287 break;
3288
3289 case GL_BYTE:
3290 if (internalFormat != GL_R8I)
3291 return GL_INVALID_OPERATION;
3292 break;
3293
3294 case GL_UNSIGNED_SHORT:
3295 if (internalFormat != GL_R16UI)
3296 return GL_INVALID_OPERATION;
3297 break;
3298
3299 case GL_SHORT:
3300 if (internalFormat != GL_R16I)
3301 return GL_INVALID_OPERATION;
3302 break;
3303
3304 case GL_UNSIGNED_INT:
3305 if (internalFormat != GL_R32UI)
3306 return GL_INVALID_OPERATION;
3307 break;
3308
3309 case GL_INT:
3310 if (internalFormat != GL_R32I)
3311 return GL_INVALID_OPERATION;
3312 break;
3313
3314 default:
3315 return GL_INVALID_OPERATION;
3316 }
3317 break;
3318
3319 case GL_DEPTH_COMPONENT:
3320 switch (type) {
3321 case GL_UNSIGNED_SHORT:
3322 if (internalFormat != GL_DEPTH_COMPONENT
3323 && internalFormat != GL_DEPTH_COMPONENT16)
3324 return GL_INVALID_OPERATION;
3325 break;
3326
3327 case GL_UNSIGNED_INT:
3328 switch (internalFormat) {
3329 case GL_DEPTH_COMPONENT:
3330 case GL_DEPTH_COMPONENT16:
3331 case GL_DEPTH_COMPONENT24:
3332 break;
3333 default:
3334 return GL_INVALID_OPERATION;
3335 }
3336 break;
3337
3338 case GL_FLOAT:
3339 if (ctx->Version <= 20 || internalFormat != GL_DEPTH_COMPONENT32F)
3340 return GL_INVALID_OPERATION;
3341 break;
3342
3343 default:
3344 return GL_INVALID_OPERATION;
3345 }
3346 break;
3347
3348 case GL_DEPTH_STENCIL:
3349 switch (type) {
3350 case GL_UNSIGNED_INT_24_8:
3351 if (internalFormat != GL_DEPTH_STENCIL
3352 && internalFormat != GL_DEPTH24_STENCIL8)
3353 return GL_INVALID_OPERATION;
3354 break;
3355
3356 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3357 if (ctx->Version <= 20 || internalFormat != GL_DEPTH32F_STENCIL8)
3358 return GL_INVALID_OPERATION;
3359 break;
3360
3361 default:
3362 return GL_INVALID_OPERATION;
3363 }
3364 break;
3365
3366 case GL_STENCIL_INDEX:
3367 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3368 type != GL_UNSIGNED_BYTE ||
3369 internalFormat != GL_STENCIL_INDEX8) {
3370 return GL_INVALID_OPERATION;
3371 }
3372 break;
3373
3374 case GL_ALPHA:
3375 case GL_LUMINANCE:
3376 case GL_LUMINANCE_ALPHA:
3377 switch (type) {
3378 case GL_FLOAT:
3379 if (!ctx->Extensions.OES_texture_float || internalFormat != format)
3380 return GL_INVALID_OPERATION;
3381 break;
3382 case GL_HALF_FLOAT_OES:
3383 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3384 return GL_INVALID_OPERATION;
3385 break;
3386 case GL_UNSIGNED_BYTE:
3387 if (!(format == internalFormat ||
3388 (format == GL_ALPHA && internalFormat == GL_ALPHA8) ||
3389 (format == GL_LUMINANCE && internalFormat == GL_LUMINANCE8) ||
3390 (format == GL_LUMINANCE_ALPHA &&
3391 ((internalFormat == GL_LUMINANCE8_ALPHA8) ||
3392 (internalFormat == GL_LUMINANCE4_ALPHA4))))) {
3393 return GL_INVALID_OPERATION;
3394 }
3395 break;
3396 default:
3397 return GL_INVALID_OPERATION;
3398 }
3399 break;
3400 }
3401
3402 return GL_NO_ERROR;
3403 }
3404
3405 static void
3406 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3407 {
3408 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3409 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3410 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3411 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3412 }
3413
3414 static bool
3415 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3416 {
3417 switch (format) {
3418 case GL_RGBA:
3419 case GL_RGBA_INTEGER_EXT:
3420 set_swizzle(swizzle, 0, 1, 2, 3);
3421 return true;
3422 case GL_BGRA:
3423 case GL_BGRA_INTEGER_EXT:
3424 set_swizzle(swizzle, 2, 1, 0, 3);
3425 return true;
3426 case GL_ABGR_EXT:
3427 set_swizzle(swizzle, 3, 2, 1, 0);
3428 return true;
3429 case GL_RGB:
3430 case GL_RGB_INTEGER_EXT:
3431 set_swizzle(swizzle, 0, 1, 2, 5);
3432 return true;
3433 case GL_BGR:
3434 case GL_BGR_INTEGER_EXT:
3435 set_swizzle(swizzle, 2, 1, 0, 5);
3436 return true;
3437 case GL_LUMINANCE_ALPHA:
3438 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3439 set_swizzle(swizzle, 0, 0, 0, 1);
3440 return true;
3441 case GL_RG:
3442 case GL_RG_INTEGER:
3443 set_swizzle(swizzle, 0, 1, 4, 5);
3444 return true;
3445 case GL_RED:
3446 case GL_RED_INTEGER_EXT:
3447 set_swizzle(swizzle, 0, 4, 4, 5);
3448 return true;
3449 case GL_GREEN:
3450 case GL_GREEN_INTEGER_EXT:
3451 set_swizzle(swizzle, 4, 0, 4, 5);
3452 return true;
3453 case GL_BLUE:
3454 case GL_BLUE_INTEGER_EXT:
3455 set_swizzle(swizzle, 4, 4, 0, 5);
3456 return true;
3457 case GL_ALPHA:
3458 case GL_ALPHA_INTEGER_EXT:
3459 set_swizzle(swizzle, 4, 4, 4, 0);
3460 return true;
3461 case GL_LUMINANCE:
3462 case GL_LUMINANCE_INTEGER_EXT:
3463 set_swizzle(swizzle, 0, 0, 0, 5);
3464 return true;
3465 case GL_INTENSITY:
3466 set_swizzle(swizzle, 0, 0, 0, 0);
3467 return true;
3468 default:
3469 return false;
3470 }
3471 }
3472
3473 /**
3474 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3475 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3476 * otherwise (for non-array formats).
3477 *
3478 * This function will typically be used to compute a mesa format from a GL type
3479 * so we can then call _mesa_format_convert. This function does
3480 * not consider byte swapping, so it returns types assuming that no byte
3481 * swapping is involved. If byte swapping is involved then clients are supposed
3482 * to handle that on their side before calling _mesa_format_convert.
3483 *
3484 * This function returns an uint32_t that can pack a mesa_format or a
3485 * mesa_array_format. Clients must check the mesa array format bit
3486 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3487 * format is a mesa_array_format or a mesa_format.
3488 */
3489 uint32_t
3490 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3491 {
3492 bool is_array_format = true;
3493 uint8_t swizzle[4];
3494 bool normalized = false, is_float = false, is_signed = false;
3495 int num_channels = 0, type_size = 0;
3496
3497 /* Extract array format type information from the OpenGL data type */
3498 switch (type) {
3499 case GL_UNSIGNED_BYTE:
3500 type_size = 1;
3501 break;
3502 case GL_BYTE:
3503 type_size = 1;
3504 is_signed = true;
3505 break;
3506 case GL_UNSIGNED_SHORT:
3507 type_size = 2;
3508 break;
3509 case GL_SHORT:
3510 type_size = 2;
3511 is_signed = true;
3512 break;
3513 case GL_UNSIGNED_INT:
3514 type_size = 4;
3515 break;
3516 case GL_INT:
3517 type_size = 4;
3518 is_signed = true;
3519 break;
3520 case GL_HALF_FLOAT:
3521 case GL_HALF_FLOAT_OES:
3522 type_size = 2;
3523 is_signed = true;
3524 is_float = true;
3525 break;
3526 case GL_FLOAT:
3527 type_size = 4;
3528 is_signed = true;
3529 is_float = true;
3530 break;
3531 default:
3532 is_array_format = false;
3533 break;
3534 }
3535
3536 /* Extract array format swizzle information from the OpenGL format */
3537 if (is_array_format)
3538 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3539
3540 /* If this is an array format type after checking data type and format,
3541 * create the array format
3542 */
3543 if (is_array_format) {
3544 normalized = !_mesa_is_enum_format_integer(format);
3545 num_channels = _mesa_components_in_format(format);
3546
3547 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
3548 normalized, num_channels,
3549 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3550 }
3551
3552 /* Otherwise this is not an array format, so return the mesa_format
3553 * matching the OpenGL format and data type
3554 */
3555 switch (type) {
3556 case GL_UNSIGNED_SHORT_5_6_5:
3557 if (format == GL_RGB)
3558 return MESA_FORMAT_B5G6R5_UNORM;
3559 else if (format == GL_BGR)
3560 return MESA_FORMAT_R5G6B5_UNORM;
3561 else if (format == GL_RGB_INTEGER)
3562 return MESA_FORMAT_B5G6R5_UINT;
3563 break;
3564 case GL_UNSIGNED_SHORT_5_6_5_REV:
3565 if (format == GL_RGB)
3566 return MESA_FORMAT_R5G6B5_UNORM;
3567 else if (format == GL_BGR)
3568 return MESA_FORMAT_B5G6R5_UNORM;
3569 else if (format == GL_RGB_INTEGER)
3570 return MESA_FORMAT_R5G6B5_UINT;
3571 break;
3572 case GL_UNSIGNED_SHORT_4_4_4_4:
3573 if (format == GL_RGBA)
3574 return MESA_FORMAT_A4B4G4R4_UNORM;
3575 else if (format == GL_BGRA)
3576 return MESA_FORMAT_A4R4G4B4_UNORM;
3577 else if (format == GL_ABGR_EXT)
3578 return MESA_FORMAT_R4G4B4A4_UNORM;
3579 else if (format == GL_RGBA_INTEGER)
3580 return MESA_FORMAT_A4B4G4R4_UINT;
3581 else if (format == GL_BGRA_INTEGER)
3582 return MESA_FORMAT_A4R4G4B4_UINT;
3583 break;
3584 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3585 if (format == GL_RGBA)
3586 return MESA_FORMAT_R4G4B4A4_UNORM;
3587 else if (format == GL_BGRA)
3588 return MESA_FORMAT_B4G4R4A4_UNORM;
3589 else if (format == GL_ABGR_EXT)
3590 return MESA_FORMAT_A4B4G4R4_UNORM;
3591 else if (format == GL_RGBA_INTEGER)
3592 return MESA_FORMAT_R4G4B4A4_UINT;
3593 else if (format == GL_BGRA_INTEGER)
3594 return MESA_FORMAT_B4G4R4A4_UINT;
3595 break;
3596 case GL_UNSIGNED_SHORT_5_5_5_1:
3597 if (format == GL_RGBA)
3598 return MESA_FORMAT_A1B5G5R5_UNORM;
3599 else if (format == GL_BGRA)
3600 return MESA_FORMAT_A1R5G5B5_UNORM;
3601 else if (format == GL_RGBA_INTEGER)
3602 return MESA_FORMAT_A1B5G5R5_UINT;
3603 else if (format == GL_BGRA_INTEGER)
3604 return MESA_FORMAT_A1R5G5B5_UINT;
3605 break;
3606 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3607 if (format == GL_RGBA)
3608 return MESA_FORMAT_R5G5B5A1_UNORM;
3609 else if (format == GL_BGRA)
3610 return MESA_FORMAT_B5G5R5A1_UNORM;
3611 else if (format == GL_RGBA_INTEGER)
3612 return MESA_FORMAT_R5G5B5A1_UINT;
3613 else if (format == GL_BGRA_INTEGER)
3614 return MESA_FORMAT_B5G5R5A1_UINT;
3615 break;
3616 case GL_UNSIGNED_BYTE_3_3_2:
3617 if (format == GL_RGB)
3618 return MESA_FORMAT_B2G3R3_UNORM;
3619 else if (format == GL_RGB_INTEGER)
3620 return MESA_FORMAT_B2G3R3_UINT;
3621 break;
3622 case GL_UNSIGNED_BYTE_2_3_3_REV:
3623 if (format == GL_RGB)
3624 return MESA_FORMAT_R3G3B2_UNORM;
3625 else if (format == GL_RGB_INTEGER)
3626 return MESA_FORMAT_R3G3B2_UINT;
3627 break;
3628 case GL_UNSIGNED_INT_5_9_9_9_REV:
3629 if (format == GL_RGB)
3630 return MESA_FORMAT_R9G9B9E5_FLOAT;
3631 break;
3632 case GL_UNSIGNED_INT_10_10_10_2:
3633 if (format == GL_RGBA)
3634 return MESA_FORMAT_A2B10G10R10_UNORM;
3635 else if (format == GL_RGBA_INTEGER)
3636 return MESA_FORMAT_A2B10G10R10_UINT;
3637 else if (format == GL_BGRA)
3638 return MESA_FORMAT_A2R10G10B10_UNORM;
3639 else if (format == GL_BGRA_INTEGER)
3640 return MESA_FORMAT_A2R10G10B10_UINT;
3641 break;
3642 case GL_UNSIGNED_INT_2_10_10_10_REV:
3643 if (format == GL_RGB)
3644 return MESA_FORMAT_R10G10B10X2_UNORM;
3645 if (format == GL_RGBA)
3646 return MESA_FORMAT_R10G10B10A2_UNORM;
3647 else if (format == GL_RGBA_INTEGER)
3648 return MESA_FORMAT_R10G10B10A2_UINT;
3649 else if (format == GL_BGRA)
3650 return MESA_FORMAT_B10G10R10A2_UNORM;
3651 else if (format == GL_BGRA_INTEGER)
3652 return MESA_FORMAT_B10G10R10A2_UINT;
3653 break;
3654 case GL_UNSIGNED_INT_8_8_8_8:
3655 if (format == GL_RGBA)
3656 return MESA_FORMAT_A8B8G8R8_UNORM;
3657 else if (format == GL_BGRA)
3658 return MESA_FORMAT_A8R8G8B8_UNORM;
3659 else if (format == GL_ABGR_EXT)
3660 return MESA_FORMAT_R8G8B8A8_UNORM;
3661 else if (format == GL_RGBA_INTEGER)
3662 return MESA_FORMAT_A8B8G8R8_UINT;
3663 else if (format == GL_BGRA_INTEGER)
3664 return MESA_FORMAT_A8R8G8B8_UINT;
3665 break;
3666 case GL_UNSIGNED_INT_8_8_8_8_REV:
3667 if (format == GL_RGBA)
3668 return MESA_FORMAT_R8G8B8A8_UNORM;
3669 else if (format == GL_BGRA)
3670 return MESA_FORMAT_B8G8R8A8_UNORM;
3671 else if (format == GL_ABGR_EXT)
3672 return MESA_FORMAT_A8B8G8R8_UNORM;
3673 else if (format == GL_RGBA_INTEGER)
3674 return MESA_FORMAT_R8G8B8A8_UINT;
3675 else if (format == GL_BGRA_INTEGER)
3676 return MESA_FORMAT_B8G8R8A8_UINT;
3677 break;
3678 case GL_UNSIGNED_SHORT_8_8_MESA:
3679 if (format == GL_YCBCR_MESA)
3680 return MESA_FORMAT_YCBCR;
3681 break;
3682 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3683 if (format == GL_YCBCR_MESA)
3684 return MESA_FORMAT_YCBCR_REV;
3685 break;
3686 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3687 if (format == GL_RGB)
3688 return MESA_FORMAT_R11G11B10_FLOAT;
3689 break;
3690 case GL_FLOAT:
3691 if (format == GL_DEPTH_COMPONENT)
3692 return MESA_FORMAT_Z_FLOAT32;
3693 break;
3694 case GL_UNSIGNED_INT:
3695 if (format == GL_DEPTH_COMPONENT)
3696 return MESA_FORMAT_Z_UNORM32;
3697 break;
3698 case GL_UNSIGNED_SHORT:
3699 if (format == GL_DEPTH_COMPONENT)
3700 return MESA_FORMAT_Z_UNORM16;
3701 break;
3702 case GL_UNSIGNED_INT_24_8:
3703 if (format == GL_DEPTH_STENCIL)
3704 return MESA_FORMAT_Z24_UNORM_S8_UINT;
3705 break;
3706 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3707 if (format == GL_DEPTH_STENCIL)
3708 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3709 break;
3710 default:
3711 break;
3712 }
3713
3714 /* If we got here it means that we could not find a Mesa format that
3715 * matches the GL format/type provided. We may need to add a new Mesa
3716 * format in that case.
3717 */
3718 unreachable("Unsupported format");
3719 }
3720
3721 uint32_t
3722 _mesa_tex_format_from_format_and_type(const struct gl_context *ctx,
3723 GLenum gl_format, GLenum type)
3724 {
3725 mesa_format format = _mesa_format_from_format_and_type(gl_format, type);
3726
3727 if (_mesa_format_is_mesa_array_format(format))
3728 format = _mesa_format_from_array_format(format);
3729
3730 if (format == MESA_FORMAT_NONE || !ctx->TextureFormatSupported[format])
3731 return MESA_FORMAT_NONE;
3732
3733 return format;
3734 }
3735
3736 /**
3737 * Returns true if \p internal_format is a sized internal format that
3738 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
3739 */
3740 bool
3741 _mesa_is_es3_color_renderable(const struct gl_context *ctx,
3742 GLenum internal_format)
3743 {
3744 switch (internal_format) {
3745 case GL_R8:
3746 case GL_RG8:
3747 case GL_RGB8:
3748 case GL_RGB565:
3749 case GL_RGBA4:
3750 case GL_RGB5_A1:
3751 case GL_RGBA8:
3752 case GL_RGB10_A2:
3753 case GL_RGB10_A2UI:
3754 case GL_SRGB8_ALPHA8:
3755 case GL_R16F:
3756 case GL_RG16F:
3757 case GL_RGBA16F:
3758 case GL_R32F:
3759 case GL_RG32F:
3760 case GL_RGBA32F:
3761 case GL_R11F_G11F_B10F:
3762 case GL_R8I:
3763 case GL_R8UI:
3764 case GL_R16I:
3765 case GL_R16UI:
3766 case GL_R32I:
3767 case GL_R32UI:
3768 case GL_RG8I:
3769 case GL_RG8UI:
3770 case GL_RG16I:
3771 case GL_RG16UI:
3772 case GL_RG32I:
3773 case GL_RG32UI:
3774 case GL_RGBA8I:
3775 case GL_RGBA8UI:
3776 case GL_RGBA16I:
3777 case GL_RGBA16UI:
3778 case GL_RGBA32I:
3779 case GL_RGBA32UI:
3780 return true;
3781 case GL_R16:
3782 case GL_RG16:
3783 case GL_RGBA16:
3784 return _mesa_has_EXT_texture_norm16(ctx);
3785 case GL_R8_SNORM:
3786 case GL_RG8_SNORM:
3787 case GL_RGBA8_SNORM:
3788 return _mesa_has_EXT_render_snorm(ctx);
3789 case GL_R16_SNORM:
3790 case GL_RG16_SNORM:
3791 case GL_RGBA16_SNORM:
3792 return _mesa_has_EXT_texture_norm16(ctx) &&
3793 _mesa_has_EXT_render_snorm(ctx);
3794 default:
3795 return false;
3796 }
3797 }
3798
3799 /**
3800 * Returns true if \p internal_format is a sized internal format that
3801 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
3802 */
3803 bool
3804 _mesa_is_es3_texture_filterable(const struct gl_context *ctx,
3805 GLenum internal_format)
3806 {
3807 switch (internal_format) {
3808 case GL_R8:
3809 case GL_R8_SNORM:
3810 case GL_RG8:
3811 case GL_RG8_SNORM:
3812 case GL_RGB8:
3813 case GL_RGB8_SNORM:
3814 case GL_RGB565:
3815 case GL_RGBA4:
3816 case GL_RGB5_A1:
3817 case GL_RGBA8:
3818 case GL_RGBA8_SNORM:
3819 case GL_RGB10_A2:
3820 case GL_SRGB8:
3821 case GL_SRGB8_ALPHA8:
3822 case GL_R16F:
3823 case GL_RG16F:
3824 case GL_RGB16F:
3825 case GL_RGBA16F:
3826 case GL_R11F_G11F_B10F:
3827 case GL_RGB9_E5:
3828 return true;
3829 case GL_R16:
3830 case GL_R16_SNORM:
3831 case GL_RG16:
3832 case GL_RG16_SNORM:
3833 case GL_RGB16:
3834 case GL_RGB16_SNORM:
3835 case GL_RGBA16:
3836 case GL_RGBA16_SNORM:
3837 return _mesa_has_EXT_texture_norm16(ctx);
3838 case GL_R32F:
3839 case GL_RG32F:
3840 case GL_RGB32F:
3841 case GL_RGBA32F:
3842 /* The OES_texture_float_linear spec says:
3843 *
3844 * "When implemented against OpenGL ES 3.0 or later versions, sized
3845 * 32-bit floating-point formats become texture-filterable. This
3846 * should be noted by, for example, checking the ``TF'' column of
3847 * table 8.13 in the ES 3.1 Specification (``Correspondence of sized
3848 * internal formats to base internal formats ... and use cases ...'')
3849 * for the R32F, RG32F, RGB32F, and RGBA32F formats."
3850 */
3851 return _mesa_has_OES_texture_float_linear(ctx);
3852 default:
3853 return false;
3854 }
3855 }