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[mesa.git] / src / mesa / main / glformats.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008-2009 VMware, Inc.
6 * Copyright (c) 2012 Intel Corporation
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28 #include "context.h"
29 #include "glformats.h"
30 #include "formats.h"
31 #include "texcompress.h"
32 #include "enums.h"
33
34 enum {
35 ZERO = 4,
36 ONE = 5
37 };
38
39 enum {
40 IDX_LUMINANCE = 0,
41 IDX_ALPHA,
42 IDX_INTENSITY,
43 IDX_LUMINANCE_ALPHA,
44 IDX_RGB,
45 IDX_RGBA,
46 IDX_RED,
47 IDX_GREEN,
48 IDX_BLUE,
49 IDX_BGR,
50 IDX_BGRA,
51 IDX_ABGR,
52 IDX_RG,
53 MAX_IDX
54 };
55
56 #define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
57 #define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
58 #define MAP3(x,y,z) MAP4(x, y, z, ZERO)
59 #define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
60
61 static const struct {
62 GLubyte format_idx;
63 GLubyte to_rgba[6];
64 GLubyte from_rgba[6];
65 } mappings[MAX_IDX] =
66 {
67 {
68 IDX_LUMINANCE,
69 MAP4(0,0,0,ONE),
70 MAP1(0)
71 },
72
73 {
74 IDX_ALPHA,
75 MAP4(ZERO, ZERO, ZERO, 0),
76 MAP1(3)
77 },
78
79 {
80 IDX_INTENSITY,
81 MAP4(0, 0, 0, 0),
82 MAP1(0),
83 },
84
85 {
86 IDX_LUMINANCE_ALPHA,
87 MAP4(0,0,0,1),
88 MAP2(0,3)
89 },
90
91 {
92 IDX_RGB,
93 MAP4(0,1,2,ONE),
94 MAP3(0,1,2)
95 },
96
97 {
98 IDX_RGBA,
99 MAP4(0,1,2,3),
100 MAP4(0,1,2,3),
101 },
102
103 {
104 IDX_RED,
105 MAP4(0, ZERO, ZERO, ONE),
106 MAP1(0),
107 },
108
109 {
110 IDX_GREEN,
111 MAP4(ZERO, 0, ZERO, ONE),
112 MAP1(1),
113 },
114
115 {
116 IDX_BLUE,
117 MAP4(ZERO, ZERO, 0, ONE),
118 MAP1(2),
119 },
120
121 {
122 IDX_BGR,
123 MAP4(2,1,0,ONE),
124 MAP3(2,1,0)
125 },
126
127 {
128 IDX_BGRA,
129 MAP4(2,1,0,3),
130 MAP4(2,1,0,3)
131 },
132
133 {
134 IDX_ABGR,
135 MAP4(3,2,1,0),
136 MAP4(3,2,1,0)
137 },
138
139 {
140 IDX_RG,
141 MAP4(0, 1, ZERO, ONE),
142 MAP2(0, 1)
143 },
144 };
145
146 /**
147 * Convert a GL image format enum to an IDX_* value (see above).
148 */
149 static int
150 get_map_idx(GLenum value)
151 {
152 switch (value) {
153 case GL_LUMINANCE:
154 case GL_LUMINANCE_INTEGER_EXT:
155 return IDX_LUMINANCE;
156 case GL_ALPHA:
157 case GL_ALPHA_INTEGER:
158 return IDX_ALPHA;
159 case GL_INTENSITY:
160 return IDX_INTENSITY;
161 case GL_LUMINANCE_ALPHA:
162 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
163 return IDX_LUMINANCE_ALPHA;
164 case GL_RGB:
165 case GL_RGB_INTEGER:
166 return IDX_RGB;
167 case GL_RGBA:
168 case GL_RGBA_INTEGER:
169 return IDX_RGBA;
170 case GL_RED:
171 case GL_RED_INTEGER:
172 return IDX_RED;
173 case GL_GREEN:
174 return IDX_GREEN;
175 case GL_BLUE:
176 return IDX_BLUE;
177 case GL_BGR:
178 case GL_BGR_INTEGER:
179 return IDX_BGR;
180 case GL_BGRA:
181 case GL_BGRA_INTEGER:
182 return IDX_BGRA;
183 case GL_ABGR_EXT:
184 return IDX_ABGR;
185 case GL_RG:
186 case GL_RG_INTEGER:
187 return IDX_RG;
188 default:
189 _mesa_problem(NULL, "Unexpected inFormat %s",
190 _mesa_enum_to_string(value));
191 return 0;
192 }
193 }
194
195 /**
196 * When promoting texture formats (see below) we need to compute the
197 * mapping of dest components back to source components.
198 * This function does that.
199 * \param inFormat the incoming format of the texture
200 * \param outFormat the final texture format
201 * \return map[6] a full 6-component map
202 */
203 void
204 _mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
205 {
206 const int inFmt = get_map_idx(inFormat);
207 const int outFmt = get_map_idx(outFormat);
208 const GLubyte *in2rgba = mappings[inFmt].to_rgba;
209 const GLubyte *rgba2out = mappings[outFmt].from_rgba;
210 int i;
211
212 for (i = 0; i < 4; i++)
213 map[i] = in2rgba[rgba2out[i]];
214
215 map[ZERO] = ZERO;
216 map[ONE] = ONE;
217
218 #if 0
219 printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
220 inFormat, _mesa_enum_to_string(inFormat),
221 outFormat, _mesa_enum_to_string(outFormat),
222 map[0],
223 map[1],
224 map[2],
225 map[3],
226 map[4],
227 map[5]);
228 #endif
229 }
230
231 /**
232 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
233 */
234 GLboolean
235 _mesa_type_is_packed(GLenum type)
236 {
237 switch (type) {
238 case GL_UNSIGNED_BYTE_3_3_2:
239 case GL_UNSIGNED_BYTE_2_3_3_REV:
240 case MESA_UNSIGNED_BYTE_4_4:
241 case GL_UNSIGNED_SHORT_5_6_5:
242 case GL_UNSIGNED_SHORT_5_6_5_REV:
243 case GL_UNSIGNED_SHORT_4_4_4_4:
244 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
245 case GL_UNSIGNED_SHORT_5_5_5_1:
246 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
247 case GL_UNSIGNED_INT_8_8_8_8:
248 case GL_UNSIGNED_INT_8_8_8_8_REV:
249 case GL_UNSIGNED_INT_10_10_10_2:
250 case GL_UNSIGNED_INT_2_10_10_10_REV:
251 case GL_UNSIGNED_SHORT_8_8_MESA:
252 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
253 case GL_UNSIGNED_INT_24_8_EXT:
254 case GL_UNSIGNED_INT_5_9_9_9_REV:
255 case GL_UNSIGNED_INT_10F_11F_11F_REV:
256 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
257 return GL_TRUE;
258 }
259
260 return GL_FALSE;
261 }
262
263
264 /**
265 * Get the size of a GL data type.
266 *
267 * \param type GL data type.
268 *
269 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
270 * if an invalid type enum.
271 */
272 GLint
273 _mesa_sizeof_type(GLenum type)
274 {
275 switch (type) {
276 case GL_BITMAP:
277 return 0;
278 case GL_UNSIGNED_BYTE:
279 return sizeof(GLubyte);
280 case GL_BYTE:
281 return sizeof(GLbyte);
282 case GL_UNSIGNED_SHORT:
283 return sizeof(GLushort);
284 case GL_SHORT:
285 return sizeof(GLshort);
286 case GL_UNSIGNED_INT:
287 return sizeof(GLuint);
288 case GL_INT:
289 return sizeof(GLint);
290 case GL_FLOAT:
291 return sizeof(GLfloat);
292 case GL_DOUBLE:
293 return sizeof(GLdouble);
294 case GL_HALF_FLOAT_ARB:
295 case GL_HALF_FLOAT_OES:
296 return sizeof(GLhalfARB);
297 case GL_FIXED:
298 return sizeof(GLfixed);
299 default:
300 return -1;
301 }
302 }
303
304
305 /**
306 * Same as _mesa_sizeof_type() but also accepting the packed pixel
307 * format data types.
308 */
309 GLint
310 _mesa_sizeof_packed_type(GLenum type)
311 {
312 switch (type) {
313 case GL_BITMAP:
314 return 0;
315 case GL_UNSIGNED_BYTE:
316 return sizeof(GLubyte);
317 case GL_BYTE:
318 return sizeof(GLbyte);
319 case GL_UNSIGNED_SHORT:
320 return sizeof(GLushort);
321 case GL_SHORT:
322 return sizeof(GLshort);
323 case GL_UNSIGNED_INT:
324 return sizeof(GLuint);
325 case GL_INT:
326 return sizeof(GLint);
327 case GL_HALF_FLOAT_ARB:
328 case GL_HALF_FLOAT_OES:
329 return sizeof(GLhalfARB);
330 case GL_FLOAT:
331 return sizeof(GLfloat);
332 case GL_UNSIGNED_BYTE_3_3_2:
333 case GL_UNSIGNED_BYTE_2_3_3_REV:
334 case MESA_UNSIGNED_BYTE_4_4:
335 return sizeof(GLubyte);
336 case GL_UNSIGNED_SHORT_5_6_5:
337 case GL_UNSIGNED_SHORT_5_6_5_REV:
338 case GL_UNSIGNED_SHORT_4_4_4_4:
339 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
340 case GL_UNSIGNED_SHORT_5_5_5_1:
341 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
342 case GL_UNSIGNED_SHORT_8_8_MESA:
343 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
344 return sizeof(GLushort);
345 case GL_UNSIGNED_INT_8_8_8_8:
346 case GL_UNSIGNED_INT_8_8_8_8_REV:
347 case GL_UNSIGNED_INT_10_10_10_2:
348 case GL_UNSIGNED_INT_2_10_10_10_REV:
349 case GL_UNSIGNED_INT_24_8_EXT:
350 case GL_UNSIGNED_INT_5_9_9_9_REV:
351 case GL_UNSIGNED_INT_10F_11F_11F_REV:
352 return sizeof(GLuint);
353 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
354 return 8;
355 default:
356 return -1;
357 }
358 }
359
360
361 /**
362 * Get the number of components in a pixel format.
363 *
364 * \param format pixel format.
365 *
366 * \return the number of components in the given format, or -1 if a bad format.
367 */
368 GLint
369 _mesa_components_in_format(GLenum format)
370 {
371 switch (format) {
372 case GL_COLOR_INDEX:
373 case GL_STENCIL_INDEX:
374 case GL_DEPTH_COMPONENT:
375 case GL_RED:
376 case GL_RED_INTEGER_EXT:
377 case GL_GREEN:
378 case GL_GREEN_INTEGER_EXT:
379 case GL_BLUE:
380 case GL_BLUE_INTEGER_EXT:
381 case GL_ALPHA:
382 case GL_ALPHA_INTEGER_EXT:
383 case GL_LUMINANCE:
384 case GL_LUMINANCE_INTEGER_EXT:
385 case GL_INTENSITY:
386 return 1;
387
388 case GL_LUMINANCE_ALPHA:
389 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
390 case GL_RG:
391 case GL_YCBCR_MESA:
392 case GL_DEPTH_STENCIL_EXT:
393 case GL_RG_INTEGER:
394 return 2;
395
396 case GL_RGB:
397 case GL_BGR:
398 case GL_RGB_INTEGER_EXT:
399 case GL_BGR_INTEGER_EXT:
400 return 3;
401
402 case GL_RGBA:
403 case GL_BGRA:
404 case GL_ABGR_EXT:
405 case GL_RGBA_INTEGER_EXT:
406 case GL_BGRA_INTEGER_EXT:
407 return 4;
408
409 default:
410 return -1;
411 }
412 }
413
414
415 /**
416 * Get the bytes per pixel of pixel format type pair.
417 *
418 * \param format pixel format.
419 * \param type pixel type.
420 *
421 * \return bytes per pixel, or -1 if a bad format or type was given.
422 */
423 GLint
424 _mesa_bytes_per_pixel(GLenum format, GLenum type)
425 {
426 GLint comps = _mesa_components_in_format(format);
427 if (comps < 0)
428 return -1;
429
430 switch (type) {
431 case GL_BITMAP:
432 return 0; /* special case */
433 case GL_BYTE:
434 case GL_UNSIGNED_BYTE:
435 return comps * sizeof(GLubyte);
436 case GL_SHORT:
437 case GL_UNSIGNED_SHORT:
438 return comps * sizeof(GLshort);
439 case GL_INT:
440 case GL_UNSIGNED_INT:
441 return comps * sizeof(GLint);
442 case GL_FLOAT:
443 return comps * sizeof(GLfloat);
444 case GL_HALF_FLOAT_ARB:
445 case GL_HALF_FLOAT_OES:
446 return comps * sizeof(GLhalfARB);
447 case GL_UNSIGNED_BYTE_3_3_2:
448 case GL_UNSIGNED_BYTE_2_3_3_REV:
449 if (format == GL_RGB || format == GL_BGR ||
450 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
451 return sizeof(GLubyte);
452 else
453 return -1; /* error */
454 case GL_UNSIGNED_SHORT_5_6_5:
455 case GL_UNSIGNED_SHORT_5_6_5_REV:
456 if (format == GL_RGB || format == GL_BGR ||
457 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
458 return sizeof(GLushort);
459 else
460 return -1; /* error */
461 case GL_UNSIGNED_SHORT_4_4_4_4:
462 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
463 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
464 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
465 return sizeof(GLushort);
466 else
467 return -1;
468 case GL_UNSIGNED_SHORT_5_5_5_1:
469 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
470 if (format == GL_RGBA || format == GL_BGRA ||
471 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
472 return sizeof(GLushort);
473 else
474 return -1;
475 case GL_UNSIGNED_INT_8_8_8_8:
476 case GL_UNSIGNED_INT_8_8_8_8_REV:
477 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
478 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
479 format == GL_RGB)
480 return sizeof(GLuint);
481 else
482 return -1;
483 case GL_UNSIGNED_INT_10_10_10_2:
484 case GL_UNSIGNED_INT_2_10_10_10_REV:
485 if (format == GL_RGBA || format == GL_BGRA ||
486 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
487 format == GL_RGB)
488 return sizeof(GLuint);
489 else
490 return -1;
491 case GL_UNSIGNED_SHORT_8_8_MESA:
492 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
493 if (format == GL_YCBCR_MESA)
494 return sizeof(GLushort);
495 else
496 return -1;
497 case GL_UNSIGNED_INT_24_8_EXT:
498 if (format == GL_DEPTH_COMPONENT ||
499 format == GL_DEPTH_STENCIL_EXT)
500 return sizeof(GLuint);
501 else
502 return -1;
503 case GL_UNSIGNED_INT_5_9_9_9_REV:
504 if (format == GL_RGB)
505 return sizeof(GLuint);
506 else
507 return -1;
508 case GL_UNSIGNED_INT_10F_11F_11F_REV:
509 if (format == GL_RGB)
510 return sizeof(GLuint);
511 else
512 return -1;
513 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
514 if (format == GL_DEPTH_STENCIL)
515 return 8;
516 else
517 return -1;
518 default:
519 return -1;
520 }
521 }
522
523
524 /**
525 * Get the number of bytes for a vertex attrib with the given number of
526 * components and type.
527 *
528 * \param comps number of components.
529 * \param type data type.
530 *
531 * \return bytes per attribute, or -1 if a bad comps/type combination was given.
532 */
533 GLint
534 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
535 {
536 switch (type) {
537 case GL_BYTE:
538 case GL_UNSIGNED_BYTE:
539 return comps * sizeof(GLubyte);
540 case GL_SHORT:
541 case GL_UNSIGNED_SHORT:
542 return comps * sizeof(GLshort);
543 case GL_INT:
544 case GL_UNSIGNED_INT:
545 return comps * sizeof(GLint);
546 case GL_FLOAT:
547 return comps * sizeof(GLfloat);
548 case GL_HALF_FLOAT_ARB:
549 return comps * sizeof(GLhalfARB);
550 case GL_DOUBLE:
551 return comps * sizeof(GLdouble);
552 case GL_FIXED:
553 return comps * sizeof(GLfixed);
554 case GL_INT_2_10_10_10_REV:
555 case GL_UNSIGNED_INT_2_10_10_10_REV:
556 if (comps == 4)
557 return sizeof(GLuint);
558 else
559 return -1;
560 case GL_UNSIGNED_INT_10F_11F_11F_REV:
561 if (comps == 3)
562 return sizeof(GLuint);
563 else
564 return -1;
565 default:
566 return -1;
567 }
568 }
569
570 /**
571 * Test if the given format is unsized.
572 */
573 GLboolean
574 _mesa_is_enum_format_unsized(GLenum format)
575 {
576 switch (format) {
577 case GL_RGBA:
578 case GL_BGRA:
579 case GL_ABGR_EXT:
580 case GL_RGB:
581 case GL_BGR:
582 case GL_RG:
583 case GL_RED:
584 case GL_GREEN:
585 case GL_BLUE:
586 case GL_ALPHA:
587 case GL_INTENSITY:
588 case GL_LUMINANCE:
589 case GL_LUMINANCE_ALPHA:
590
591 case GL_SRGB:
592 case GL_SRGB_ALPHA:
593 case GL_SLUMINANCE:
594 case GL_SLUMINANCE_ALPHA:
595
596 case GL_RGBA_SNORM:
597 case GL_RGB_SNORM:
598 case GL_RG_SNORM:
599 case GL_RED_SNORM:
600 case GL_ALPHA_SNORM:
601 case GL_INTENSITY_SNORM:
602 case GL_LUMINANCE_SNORM:
603 case GL_LUMINANCE_ALPHA_SNORM:
604
605 case GL_RED_INTEGER:
606 case GL_GREEN_INTEGER:
607 case GL_BLUE_INTEGER:
608 case GL_ALPHA_INTEGER:
609 case GL_RGB_INTEGER:
610 case GL_RGBA_INTEGER:
611 case GL_BGR_INTEGER:
612 case GL_BGRA_INTEGER:
613 case GL_RG_INTEGER:
614 case GL_LUMINANCE_INTEGER_EXT:
615 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
616
617 case GL_DEPTH_COMPONENT:
618 case GL_DEPTH_STENCIL:
619 case GL_STENCIL_INDEX:
620 return GL_TRUE;
621 default:
622 return GL_FALSE;
623 }
624 }
625
626 /**
627 * Test if the given format is a UNORM (unsigned-normalized) format.
628 */
629 GLboolean
630 _mesa_is_enum_format_unorm(GLenum format)
631 {
632 switch(format) {
633 case GL_RED:
634 case GL_GREEN:
635 case GL_BLUE:
636 case GL_ALPHA:
637 case GL_ALPHA4:
638 case GL_ALPHA8:
639 case GL_ALPHA12:
640 case GL_ALPHA16:
641 case 1:
642 case GL_LUMINANCE:
643 case GL_SLUMINANCE:
644 case GL_LUMINANCE4:
645 case GL_LUMINANCE8:
646 case GL_LUMINANCE12:
647 case GL_LUMINANCE16:
648 case 2:
649 case GL_LUMINANCE_ALPHA:
650 case GL_SLUMINANCE_ALPHA:
651 case GL_LUMINANCE4_ALPHA4:
652 case GL_LUMINANCE6_ALPHA2:
653 case GL_LUMINANCE8_ALPHA8:
654 case GL_LUMINANCE12_ALPHA4:
655 case GL_LUMINANCE12_ALPHA12:
656 case GL_LUMINANCE16_ALPHA16:
657 case GL_INTENSITY:
658 case GL_INTENSITY4:
659 case GL_INTENSITY8:
660 case GL_INTENSITY12:
661 case GL_INTENSITY16:
662 case GL_R8:
663 case GL_R16:
664 case GL_RG:
665 case GL_RG8:
666 case GL_RG16:
667 case 3:
668 case GL_RGB:
669 case GL_BGR:
670 case GL_SRGB:
671 case GL_R3_G3_B2:
672 case GL_RGB4:
673 case GL_RGB5:
674 case GL_RGB565:
675 case GL_RGB8:
676 case GL_RGB10:
677 case GL_RGB12:
678 case GL_RGB16:
679 case 4:
680 case GL_ABGR_EXT:
681 case GL_RGBA:
682 case GL_BGRA:
683 case GL_SRGB_ALPHA:
684 case GL_RGBA2:
685 case GL_RGBA4:
686 case GL_RGB5_A1:
687 case GL_RGBA8:
688 case GL_RGB10_A2:
689 case GL_RGBA12:
690 case GL_RGBA16:
691 return GL_TRUE;
692 default:
693 return GL_FALSE;
694 }
695 }
696
697 /**
698 * Test if the given format is a SNORM (signed-normalized) format.
699 */
700 GLboolean
701 _mesa_is_enum_format_snorm(GLenum format)
702 {
703 switch (format) {
704 /* signed, normalized texture formats */
705 case GL_RED_SNORM:
706 case GL_R8_SNORM:
707 case GL_R16_SNORM:
708 case GL_RG_SNORM:
709 case GL_RG8_SNORM:
710 case GL_RG16_SNORM:
711 case GL_RGB_SNORM:
712 case GL_RGB8_SNORM:
713 case GL_RGB16_SNORM:
714 case GL_RGBA_SNORM:
715 case GL_RGBA8_SNORM:
716 case GL_RGBA16_SNORM:
717 case GL_ALPHA_SNORM:
718 case GL_ALPHA8_SNORM:
719 case GL_ALPHA16_SNORM:
720 case GL_LUMINANCE_SNORM:
721 case GL_LUMINANCE8_SNORM:
722 case GL_LUMINANCE16_SNORM:
723 case GL_LUMINANCE_ALPHA_SNORM:
724 case GL_LUMINANCE8_ALPHA8_SNORM:
725 case GL_LUMINANCE16_ALPHA16_SNORM:
726 case GL_INTENSITY_SNORM:
727 case GL_INTENSITY8_SNORM:
728 case GL_INTENSITY16_SNORM:
729 return GL_TRUE;
730 default:
731 return GL_FALSE;
732 }
733 }
734
735 /**
736 * Test if the given format is an integer (non-normalized) format.
737 */
738 GLboolean
739 _mesa_is_enum_format_unsigned_int(GLenum format)
740 {
741 switch (format) {
742 /* specific integer formats */
743 case GL_RGBA32UI_EXT:
744 case GL_RGB32UI_EXT:
745 case GL_RG32UI:
746 case GL_R32UI:
747 case GL_ALPHA32UI_EXT:
748 case GL_INTENSITY32UI_EXT:
749 case GL_LUMINANCE32UI_EXT:
750 case GL_LUMINANCE_ALPHA32UI_EXT:
751 case GL_RGBA16UI_EXT:
752 case GL_RGB16UI_EXT:
753 case GL_RG16UI:
754 case GL_R16UI:
755 case GL_ALPHA16UI_EXT:
756 case GL_INTENSITY16UI_EXT:
757 case GL_LUMINANCE16UI_EXT:
758 case GL_LUMINANCE_ALPHA16UI_EXT:
759 case GL_RGBA8UI_EXT:
760 case GL_RGB8UI_EXT:
761 case GL_RG8UI:
762 case GL_R8UI:
763 case GL_ALPHA8UI_EXT:
764 case GL_INTENSITY8UI_EXT:
765 case GL_LUMINANCE8UI_EXT:
766 case GL_LUMINANCE_ALPHA8UI_EXT:
767 case GL_RGB10_A2UI:
768 return GL_TRUE;
769 default:
770 return GL_FALSE;
771 }
772 }
773
774
775 /**
776 * Test if the given format is an integer (non-normalized) format.
777 */
778 GLboolean
779 _mesa_is_enum_format_signed_int(GLenum format)
780 {
781 switch (format) {
782 /* generic integer formats */
783 case GL_RED_INTEGER_EXT:
784 case GL_GREEN_INTEGER_EXT:
785 case GL_BLUE_INTEGER_EXT:
786 case GL_ALPHA_INTEGER_EXT:
787 case GL_RGB_INTEGER_EXT:
788 case GL_RGBA_INTEGER_EXT:
789 case GL_BGR_INTEGER_EXT:
790 case GL_BGRA_INTEGER_EXT:
791 case GL_LUMINANCE_INTEGER_EXT:
792 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
793 case GL_RG_INTEGER:
794 /* specific integer formats */
795 case GL_RGBA32I_EXT:
796 case GL_RGB32I_EXT:
797 case GL_RG32I:
798 case GL_R32I:
799 case GL_ALPHA32I_EXT:
800 case GL_INTENSITY32I_EXT:
801 case GL_LUMINANCE32I_EXT:
802 case GL_LUMINANCE_ALPHA32I_EXT:
803 case GL_RGBA16I_EXT:
804 case GL_RGB16I_EXT:
805 case GL_RG16I:
806 case GL_R16I:
807 case GL_ALPHA16I_EXT:
808 case GL_INTENSITY16I_EXT:
809 case GL_LUMINANCE16I_EXT:
810 case GL_LUMINANCE_ALPHA16I_EXT:
811 case GL_RGBA8I_EXT:
812 case GL_RGB8I_EXT:
813 case GL_RG8I:
814 case GL_R8I:
815 case GL_ALPHA8I_EXT:
816 case GL_INTENSITY8I_EXT:
817 case GL_LUMINANCE8I_EXT:
818 case GL_LUMINANCE_ALPHA8I_EXT:
819 return GL_TRUE;
820 default:
821 return GL_FALSE;
822 }
823 }
824
825 /**
826 * Test if the given format is an ASTC 2D format.
827 */
828 static bool
829 is_astc_2d_format(GLenum internalFormat)
830 {
831 switch (internalFormat) {
832 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
833 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
834 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
835 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
844 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
845 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
846 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
847 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
848 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
858 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
859 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
860 return true;
861 default:
862 return false;
863 }
864 }
865
866 /**
867 * Test if the given format is an ASTC 3D format.
868 */
869 static bool
870 is_astc_3d_format(GLenum internalFormat)
871 {
872 switch (internalFormat) {
873 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
874 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
875 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
876 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
877 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
878 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
879 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
880 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
881 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
882 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
883 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
884 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
885 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
886 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
887 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
888 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
889 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
890 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
891 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
892 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
893 return true;
894 default:
895 return false;
896 }
897 }
898
899 /**
900 * Test if the given format is an ASTC format.
901 */
902 GLboolean
903 _mesa_is_astc_format(GLenum internalFormat)
904 {
905 return is_astc_2d_format(internalFormat) ||
906 is_astc_3d_format(internalFormat);
907 }
908
909 /**
910 * Test if the given format is an ETC2 format.
911 */
912 GLboolean
913 _mesa_is_etc2_format(GLenum internalFormat)
914 {
915 switch (internalFormat) {
916 case GL_COMPRESSED_RGB8_ETC2:
917 case GL_COMPRESSED_SRGB8_ETC2:
918 case GL_COMPRESSED_RGBA8_ETC2_EAC:
919 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
920 case GL_COMPRESSED_R11_EAC:
921 case GL_COMPRESSED_RG11_EAC:
922 case GL_COMPRESSED_SIGNED_R11_EAC:
923 case GL_COMPRESSED_SIGNED_RG11_EAC:
924 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
925 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
926 return true;
927 default:
928 return false;
929 }
930 }
931
932 /**
933 * Test if the given format is an integer (non-normalized) format.
934 */
935 GLboolean
936 _mesa_is_enum_format_integer(GLenum format)
937 {
938 return _mesa_is_enum_format_unsigned_int(format) ||
939 _mesa_is_enum_format_signed_int(format);
940 }
941
942
943 GLboolean
944 _mesa_is_type_unsigned(GLenum type)
945 {
946 switch (type) {
947 case GL_UNSIGNED_INT:
948 case GL_UNSIGNED_INT_8_8_8_8:
949 case GL_UNSIGNED_INT_8_8_8_8_REV:
950 case GL_UNSIGNED_INT_10_10_10_2:
951 case GL_UNSIGNED_INT_2_10_10_10_REV:
952
953 case GL_UNSIGNED_SHORT:
954 case GL_UNSIGNED_SHORT_4_4_4_4:
955 case GL_UNSIGNED_SHORT_5_5_5_1:
956 case GL_UNSIGNED_SHORT_5_6_5:
957 case GL_UNSIGNED_SHORT_5_6_5_REV:
958 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
959 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
960 case GL_UNSIGNED_SHORT_8_8_MESA:
961 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
962
963 case GL_UNSIGNED_BYTE:
964 case GL_UNSIGNED_BYTE_3_3_2:
965 case GL_UNSIGNED_BYTE_2_3_3_REV:
966 return GL_TRUE;
967
968 default:
969 return GL_FALSE;
970 }
971 }
972
973
974 /**
975 * Test if the given image format is a color/RGBA format (i.e., not color
976 * index, depth, stencil, etc).
977 * \param format the image format value (may by an internal texture format)
978 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
979 */
980 GLboolean
981 _mesa_is_color_format(GLenum format)
982 {
983 switch (format) {
984 case GL_RED:
985 case GL_GREEN:
986 case GL_BLUE:
987 case GL_ALPHA:
988 case GL_ALPHA4:
989 case GL_ALPHA8:
990 case GL_ALPHA12:
991 case GL_ALPHA16:
992 case 1:
993 case GL_LUMINANCE:
994 case GL_LUMINANCE4:
995 case GL_LUMINANCE8:
996 case GL_LUMINANCE12:
997 case GL_LUMINANCE16:
998 case 2:
999 case GL_LUMINANCE_ALPHA:
1000 case GL_LUMINANCE4_ALPHA4:
1001 case GL_LUMINANCE6_ALPHA2:
1002 case GL_LUMINANCE8_ALPHA8:
1003 case GL_LUMINANCE12_ALPHA4:
1004 case GL_LUMINANCE12_ALPHA12:
1005 case GL_LUMINANCE16_ALPHA16:
1006 case GL_INTENSITY:
1007 case GL_INTENSITY4:
1008 case GL_INTENSITY8:
1009 case GL_INTENSITY12:
1010 case GL_INTENSITY16:
1011 case GL_R8:
1012 case GL_R16:
1013 case GL_RG:
1014 case GL_RG8:
1015 case GL_RG16:
1016 case 3:
1017 case GL_RGB:
1018 case GL_BGR:
1019 case GL_R3_G3_B2:
1020 case GL_RGB4:
1021 case GL_RGB5:
1022 case GL_RGB565:
1023 case GL_RGB8:
1024 case GL_RGB10:
1025 case GL_RGB12:
1026 case GL_RGB16:
1027 case 4:
1028 case GL_ABGR_EXT:
1029 case GL_RGBA:
1030 case GL_BGRA:
1031 case GL_RGBA2:
1032 case GL_RGBA4:
1033 case GL_RGB5_A1:
1034 case GL_RGBA8:
1035 case GL_RGB10_A2:
1036 case GL_RGBA12:
1037 case GL_RGBA16:
1038 /* float texture formats */
1039 case GL_ALPHA16F_ARB:
1040 case GL_ALPHA32F_ARB:
1041 case GL_LUMINANCE16F_ARB:
1042 case GL_LUMINANCE32F_ARB:
1043 case GL_LUMINANCE_ALPHA16F_ARB:
1044 case GL_LUMINANCE_ALPHA32F_ARB:
1045 case GL_INTENSITY16F_ARB:
1046 case GL_INTENSITY32F_ARB:
1047 case GL_R16F:
1048 case GL_R32F:
1049 case GL_RG16F:
1050 case GL_RG32F:
1051 case GL_RGB16F_ARB:
1052 case GL_RGB32F_ARB:
1053 case GL_RGBA16F_ARB:
1054 case GL_RGBA32F_ARB:
1055 /* compressed formats */
1056 case GL_COMPRESSED_ALPHA:
1057 case GL_COMPRESSED_LUMINANCE:
1058 case GL_COMPRESSED_LUMINANCE_ALPHA:
1059 case GL_COMPRESSED_INTENSITY:
1060 case GL_COMPRESSED_RED:
1061 case GL_COMPRESSED_RG:
1062 case GL_COMPRESSED_RGB:
1063 case GL_COMPRESSED_RGBA:
1064 case GL_RGB_S3TC:
1065 case GL_RGB4_S3TC:
1066 case GL_RGBA_S3TC:
1067 case GL_RGBA4_S3TC:
1068 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1069 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1070 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1071 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1072 case GL_COMPRESSED_RGB_FXT1_3DFX:
1073 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1074 case GL_SRGB_EXT:
1075 case GL_SRGB8_EXT:
1076 case GL_SRGB_ALPHA_EXT:
1077 case GL_SRGB8_ALPHA8_EXT:
1078 case GL_SLUMINANCE_ALPHA_EXT:
1079 case GL_SLUMINANCE8_ALPHA8_EXT:
1080 case GL_SLUMINANCE_EXT:
1081 case GL_SLUMINANCE8_EXT:
1082 case GL_COMPRESSED_SRGB_EXT:
1083 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1084 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1085 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1086 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1087 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1088 case GL_COMPRESSED_SLUMINANCE_EXT:
1089 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1090 case GL_COMPRESSED_RED_RGTC1:
1091 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1092 case GL_COMPRESSED_RG_RGTC2:
1093 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1094 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1095 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1096 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1097 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1098 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1099 case GL_ETC1_RGB8_OES:
1100 case GL_COMPRESSED_RGB8_ETC2:
1101 case GL_COMPRESSED_SRGB8_ETC2:
1102 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1103 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1104 case GL_COMPRESSED_R11_EAC:
1105 case GL_COMPRESSED_RG11_EAC:
1106 case GL_COMPRESSED_SIGNED_R11_EAC:
1107 case GL_COMPRESSED_SIGNED_RG11_EAC:
1108 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1109 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1110 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1111 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1112 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1113 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1114 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1115 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1116 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1117 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1118 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1119 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1120 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1121 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1122 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1123 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1124 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1125 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1126 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1127 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1128 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1129 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1130 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1131 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1132 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1133 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1134 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1135 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1136 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1137 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1138 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1139 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1140 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1141 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1142 /* generic integer formats */
1143 case GL_RED_INTEGER_EXT:
1144 case GL_GREEN_INTEGER_EXT:
1145 case GL_BLUE_INTEGER_EXT:
1146 case GL_ALPHA_INTEGER_EXT:
1147 case GL_RGB_INTEGER_EXT:
1148 case GL_RGBA_INTEGER_EXT:
1149 case GL_BGR_INTEGER_EXT:
1150 case GL_BGRA_INTEGER_EXT:
1151 case GL_RG_INTEGER:
1152 case GL_LUMINANCE_INTEGER_EXT:
1153 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1154 /* sized integer formats */
1155 case GL_RGBA32UI_EXT:
1156 case GL_RGB32UI_EXT:
1157 case GL_RG32UI:
1158 case GL_R32UI:
1159 case GL_ALPHA32UI_EXT:
1160 case GL_INTENSITY32UI_EXT:
1161 case GL_LUMINANCE32UI_EXT:
1162 case GL_LUMINANCE_ALPHA32UI_EXT:
1163 case GL_RGBA16UI_EXT:
1164 case GL_RGB16UI_EXT:
1165 case GL_RG16UI:
1166 case GL_R16UI:
1167 case GL_ALPHA16UI_EXT:
1168 case GL_INTENSITY16UI_EXT:
1169 case GL_LUMINANCE16UI_EXT:
1170 case GL_LUMINANCE_ALPHA16UI_EXT:
1171 case GL_RGBA8UI_EXT:
1172 case GL_RGB8UI_EXT:
1173 case GL_RG8UI:
1174 case GL_R8UI:
1175 case GL_ALPHA8UI_EXT:
1176 case GL_INTENSITY8UI_EXT:
1177 case GL_LUMINANCE8UI_EXT:
1178 case GL_LUMINANCE_ALPHA8UI_EXT:
1179 case GL_RGBA32I_EXT:
1180 case GL_RGB32I_EXT:
1181 case GL_RG32I:
1182 case GL_R32I:
1183 case GL_ALPHA32I_EXT:
1184 case GL_INTENSITY32I_EXT:
1185 case GL_LUMINANCE32I_EXT:
1186 case GL_LUMINANCE_ALPHA32I_EXT:
1187 case GL_RGBA16I_EXT:
1188 case GL_RGB16I_EXT:
1189 case GL_RG16I:
1190 case GL_R16I:
1191 case GL_ALPHA16I_EXT:
1192 case GL_INTENSITY16I_EXT:
1193 case GL_LUMINANCE16I_EXT:
1194 case GL_LUMINANCE_ALPHA16I_EXT:
1195 case GL_RGBA8I_EXT:
1196 case GL_RGB8I_EXT:
1197 case GL_RG8I:
1198 case GL_R8I:
1199 case GL_ALPHA8I_EXT:
1200 case GL_INTENSITY8I_EXT:
1201 case GL_LUMINANCE8I_EXT:
1202 case GL_LUMINANCE_ALPHA8I_EXT:
1203 /* signed, normalized texture formats */
1204 case GL_RED_SNORM:
1205 case GL_R8_SNORM:
1206 case GL_R16_SNORM:
1207 case GL_RG_SNORM:
1208 case GL_RG8_SNORM:
1209 case GL_RG16_SNORM:
1210 case GL_RGB_SNORM:
1211 case GL_RGB8_SNORM:
1212 case GL_RGB16_SNORM:
1213 case GL_RGBA_SNORM:
1214 case GL_RGBA8_SNORM:
1215 case GL_RGBA16_SNORM:
1216 case GL_ALPHA_SNORM:
1217 case GL_ALPHA8_SNORM:
1218 case GL_ALPHA16_SNORM:
1219 case GL_LUMINANCE_SNORM:
1220 case GL_LUMINANCE8_SNORM:
1221 case GL_LUMINANCE16_SNORM:
1222 case GL_LUMINANCE_ALPHA_SNORM:
1223 case GL_LUMINANCE8_ALPHA8_SNORM:
1224 case GL_LUMINANCE16_ALPHA16_SNORM:
1225 case GL_INTENSITY_SNORM:
1226 case GL_INTENSITY8_SNORM:
1227 case GL_INTENSITY16_SNORM:
1228 case GL_RGB9_E5:
1229 case GL_R11F_G11F_B10F:
1230 case GL_RGB10_A2UI:
1231 return GL_TRUE;
1232 case GL_YCBCR_MESA: /* not considered to be RGB */
1233 /* fall-through */
1234 default:
1235 return GL_FALSE;
1236 }
1237 }
1238
1239
1240 /**
1241 * Test if the given image format is a depth component format.
1242 */
1243 GLboolean
1244 _mesa_is_depth_format(GLenum format)
1245 {
1246 switch (format) {
1247 case GL_DEPTH_COMPONENT:
1248 case GL_DEPTH_COMPONENT16:
1249 case GL_DEPTH_COMPONENT24:
1250 case GL_DEPTH_COMPONENT32:
1251 case GL_DEPTH_COMPONENT32F:
1252 return GL_TRUE;
1253 default:
1254 return GL_FALSE;
1255 }
1256 }
1257
1258
1259 /**
1260 * Test if the given image format is a stencil format.
1261 */
1262 GLboolean
1263 _mesa_is_stencil_format(GLenum format)
1264 {
1265 switch (format) {
1266 case GL_STENCIL_INDEX:
1267 return GL_TRUE;
1268 default:
1269 return GL_FALSE;
1270 }
1271 }
1272
1273
1274 /**
1275 * Test if the given image format is a YCbCr format.
1276 */
1277 GLboolean
1278 _mesa_is_ycbcr_format(GLenum format)
1279 {
1280 switch (format) {
1281 case GL_YCBCR_MESA:
1282 return GL_TRUE;
1283 default:
1284 return GL_FALSE;
1285 }
1286 }
1287
1288
1289 /**
1290 * Test if the given image format is a depth+stencil format.
1291 */
1292 GLboolean
1293 _mesa_is_depthstencil_format(GLenum format)
1294 {
1295 switch (format) {
1296 case GL_DEPTH24_STENCIL8_EXT:
1297 case GL_DEPTH_STENCIL_EXT:
1298 case GL_DEPTH32F_STENCIL8:
1299 return GL_TRUE;
1300 default:
1301 return GL_FALSE;
1302 }
1303 }
1304
1305
1306 /**
1307 * Test if the given image format is a depth or stencil format.
1308 */
1309 GLboolean
1310 _mesa_is_depth_or_stencil_format(GLenum format)
1311 {
1312 switch (format) {
1313 case GL_DEPTH_COMPONENT:
1314 case GL_DEPTH_COMPONENT16:
1315 case GL_DEPTH_COMPONENT24:
1316 case GL_DEPTH_COMPONENT32:
1317 case GL_STENCIL_INDEX:
1318 case GL_STENCIL_INDEX1_EXT:
1319 case GL_STENCIL_INDEX4_EXT:
1320 case GL_STENCIL_INDEX8_EXT:
1321 case GL_STENCIL_INDEX16_EXT:
1322 case GL_DEPTH_STENCIL_EXT:
1323 case GL_DEPTH24_STENCIL8_EXT:
1324 case GL_DEPTH_COMPONENT32F:
1325 case GL_DEPTH32F_STENCIL8:
1326 return GL_TRUE;
1327 default:
1328 return GL_FALSE;
1329 }
1330 }
1331
1332
1333 /**
1334 * Test if an image format is a supported compressed format.
1335 * \param format the internal format token provided by the user.
1336 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1337 */
1338 GLboolean
1339 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1340 {
1341 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1342
1343 /* Some formats in this switch have an equivalent mesa_format_layout
1344 * to the compressed formats in the layout switch below and thus
1345 * must be handled first.
1346 */
1347 switch (format) {
1348 case GL_RGB_S3TC:
1349 case GL_RGB4_S3TC:
1350 case GL_RGBA_S3TC:
1351 case GL_RGBA4_S3TC:
1352 return _mesa_is_desktop_gl(ctx) &&
1353 ctx->Extensions.ANGLE_texture_compression_dxt;
1354 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1355 return ctx->API == API_OPENGL_COMPAT
1356 && ctx->Extensions.ATI_texture_compression_3dc;
1357 case GL_PALETTE4_RGB8_OES:
1358 case GL_PALETTE4_RGBA8_OES:
1359 case GL_PALETTE4_R5_G6_B5_OES:
1360 case GL_PALETTE4_RGBA4_OES:
1361 case GL_PALETTE4_RGB5_A1_OES:
1362 case GL_PALETTE8_RGB8_OES:
1363 case GL_PALETTE8_RGBA8_OES:
1364 case GL_PALETTE8_R5_G6_B5_OES:
1365 case GL_PALETTE8_RGBA4_OES:
1366 case GL_PALETTE8_RGB5_A1_OES:
1367 return ctx->API == API_OPENGLES;
1368 }
1369
1370 switch (_mesa_get_format_layout(m_format)) {
1371 case MESA_FORMAT_LAYOUT_S3TC:
1372 if (_mesa_get_format_color_encoding(m_format) == GL_LINEAR) {
1373 /* Assume that the ANGLE flag will always be set if the
1374 * EXT flag is set.
1375 */
1376 return ctx->Extensions.ANGLE_texture_compression_dxt;
1377 } else {
1378 return _mesa_is_desktop_gl(ctx)
1379 && ctx->Extensions.EXT_texture_sRGB
1380 && ctx->Extensions.EXT_texture_compression_s3tc;
1381 }
1382 case MESA_FORMAT_LAYOUT_FXT1:
1383 return _mesa_is_desktop_gl(ctx)
1384 && ctx->Extensions.TDFX_texture_compression_FXT1;
1385 case MESA_FORMAT_LAYOUT_RGTC:
1386 return _mesa_is_desktop_gl(ctx)
1387 && ctx->Extensions.ARB_texture_compression_rgtc;
1388 case MESA_FORMAT_LAYOUT_LATC:
1389 return ctx->API == API_OPENGL_COMPAT
1390 && ctx->Extensions.EXT_texture_compression_latc;
1391 case MESA_FORMAT_LAYOUT_ETC1:
1392 return _mesa_is_gles(ctx)
1393 && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
1394 case MESA_FORMAT_LAYOUT_ETC2:
1395 return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
1396 case MESA_FORMAT_LAYOUT_BPTC:
1397 return _mesa_is_desktop_gl(ctx) &&
1398 ctx->Extensions.ARB_texture_compression_bptc;
1399 case MESA_FORMAT_LAYOUT_ASTC:
1400 return ctx->Extensions.KHR_texture_compression_astc_ldr;
1401 default:
1402 return GL_FALSE;
1403 }
1404 }
1405
1406 /**
1407 * Test if the given format represents an sRGB format.
1408 * \param format the GL format (can be an internal format)
1409 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1410 */
1411 GLboolean
1412 _mesa_is_srgb_format(GLenum format)
1413 {
1414 switch (format) {
1415 case GL_SRGB:
1416 case GL_SRGB8:
1417 case GL_SRGB_ALPHA:
1418 case GL_SRGB8_ALPHA8:
1419 case GL_COMPRESSED_SRGB:
1420 case GL_COMPRESSED_SRGB_ALPHA:
1421 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1422 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1423 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1424 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1425 case GL_COMPRESSED_SRGB8_ETC2:
1426 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1427 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1428 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1429 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1430 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1431 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1432 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1433 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1434 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1435 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1436 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1437 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1438 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1439 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1440 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1441 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1442 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1443 return GL_TRUE;
1444 default:
1445 break;
1446 }
1447
1448 return GL_FALSE;
1449 }
1450
1451 /**
1452 * Convert various unpack formats to the corresponding base format.
1453 */
1454 GLenum
1455 _mesa_unpack_format_to_base_format(GLenum format)
1456 {
1457 switch(format) {
1458 case GL_RED_INTEGER:
1459 return GL_RED;
1460 case GL_GREEN_INTEGER:
1461 return GL_GREEN;
1462 case GL_BLUE_INTEGER:
1463 return GL_BLUE;
1464 case GL_ALPHA_INTEGER:
1465 return GL_ALPHA;
1466 case GL_RG_INTEGER:
1467 return GL_RG;
1468 case GL_RGB_INTEGER:
1469 return GL_RGB;
1470 case GL_RGBA_INTEGER:
1471 return GL_RGBA;
1472 case GL_BGR_INTEGER:
1473 return GL_BGR;
1474 case GL_BGRA_INTEGER:
1475 return GL_BGRA;
1476 case GL_LUMINANCE_INTEGER_EXT:
1477 return GL_LUMINANCE;
1478 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1479 return GL_LUMINANCE_ALPHA;
1480 case GL_RED:
1481 case GL_GREEN:
1482 case GL_BLUE:
1483 case GL_RG:
1484 case GL_RGB:
1485 case GL_RGBA:
1486 case GL_BGR:
1487 case GL_BGRA:
1488 case GL_ALPHA:
1489 case GL_LUMINANCE:
1490 case GL_LUMINANCE_ALPHA:
1491 default:
1492 return format;
1493 }
1494 }
1495
1496 /**
1497 * Convert various base formats to the corresponding integer format.
1498 */
1499 GLenum
1500 _mesa_base_format_to_integer_format(GLenum format)
1501 {
1502 switch(format) {
1503 case GL_RED:
1504 return GL_RED_INTEGER;
1505 case GL_GREEN:
1506 return GL_GREEN_INTEGER;
1507 case GL_BLUE:
1508 return GL_BLUE_INTEGER;
1509 case GL_RG:
1510 return GL_RG_INTEGER;
1511 case GL_RGB:
1512 return GL_RGB_INTEGER;
1513 case GL_RGBA:
1514 return GL_RGBA_INTEGER;
1515 case GL_BGR:
1516 return GL_BGR_INTEGER;
1517 case GL_BGRA:
1518 return GL_BGRA_INTEGER;
1519 case GL_ALPHA:
1520 return GL_ALPHA_INTEGER;
1521 case GL_LUMINANCE:
1522 return GL_LUMINANCE_INTEGER_EXT;
1523 case GL_LUMINANCE_ALPHA:
1524 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1525 }
1526
1527 return format;
1528 }
1529
1530
1531 /**
1532 * Does the given base texture/renderbuffer format have the channel
1533 * named by 'pname'?
1534 */
1535 GLboolean
1536 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1537 {
1538 switch (pname) {
1539 case GL_TEXTURE_RED_SIZE:
1540 case GL_TEXTURE_RED_TYPE:
1541 case GL_RENDERBUFFER_RED_SIZE_EXT:
1542 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1543 case GL_INTERNALFORMAT_RED_SIZE:
1544 case GL_INTERNALFORMAT_RED_TYPE:
1545 if (base_format == GL_RED ||
1546 base_format == GL_RG ||
1547 base_format == GL_RGB ||
1548 base_format == GL_RGBA) {
1549 return GL_TRUE;
1550 }
1551 return GL_FALSE;
1552 case GL_TEXTURE_GREEN_SIZE:
1553 case GL_TEXTURE_GREEN_TYPE:
1554 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1555 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1556 case GL_INTERNALFORMAT_GREEN_SIZE:
1557 case GL_INTERNALFORMAT_GREEN_TYPE:
1558 if (base_format == GL_RG ||
1559 base_format == GL_RGB ||
1560 base_format == GL_RGBA) {
1561 return GL_TRUE;
1562 }
1563 return GL_FALSE;
1564 case GL_TEXTURE_BLUE_SIZE:
1565 case GL_TEXTURE_BLUE_TYPE:
1566 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1567 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1568 case GL_INTERNALFORMAT_BLUE_SIZE:
1569 case GL_INTERNALFORMAT_BLUE_TYPE:
1570 if (base_format == GL_RGB ||
1571 base_format == GL_RGBA) {
1572 return GL_TRUE;
1573 }
1574 return GL_FALSE;
1575 case GL_TEXTURE_ALPHA_SIZE:
1576 case GL_TEXTURE_ALPHA_TYPE:
1577 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1578 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1579 case GL_INTERNALFORMAT_ALPHA_SIZE:
1580 case GL_INTERNALFORMAT_ALPHA_TYPE:
1581 if (base_format == GL_RGBA ||
1582 base_format == GL_ALPHA ||
1583 base_format == GL_LUMINANCE_ALPHA) {
1584 return GL_TRUE;
1585 }
1586 return GL_FALSE;
1587 case GL_TEXTURE_LUMINANCE_SIZE:
1588 case GL_TEXTURE_LUMINANCE_TYPE:
1589 if (base_format == GL_LUMINANCE ||
1590 base_format == GL_LUMINANCE_ALPHA) {
1591 return GL_TRUE;
1592 }
1593 return GL_FALSE;
1594 case GL_TEXTURE_INTENSITY_SIZE:
1595 case GL_TEXTURE_INTENSITY_TYPE:
1596 if (base_format == GL_INTENSITY) {
1597 return GL_TRUE;
1598 }
1599 return GL_FALSE;
1600 case GL_TEXTURE_DEPTH_SIZE:
1601 case GL_TEXTURE_DEPTH_TYPE:
1602 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1603 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1604 case GL_INTERNALFORMAT_DEPTH_SIZE:
1605 case GL_INTERNALFORMAT_DEPTH_TYPE:
1606 if (base_format == GL_DEPTH_STENCIL ||
1607 base_format == GL_DEPTH_COMPONENT) {
1608 return GL_TRUE;
1609 }
1610 return GL_FALSE;
1611 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1612 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1613 case GL_INTERNALFORMAT_STENCIL_SIZE:
1614 case GL_INTERNALFORMAT_STENCIL_TYPE:
1615 if (base_format == GL_DEPTH_STENCIL ||
1616 base_format == GL_STENCIL_INDEX) {
1617 return GL_TRUE;
1618 }
1619 return GL_FALSE;
1620 default:
1621 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1622 __func__, pname);
1623 return GL_FALSE;
1624 }
1625
1626 return GL_FALSE;
1627 }
1628
1629
1630 /**
1631 * Returns the number of channels/components for a base format.
1632 */
1633 GLint
1634 _mesa_base_format_component_count(GLenum base_format)
1635 {
1636 switch (base_format) {
1637 case GL_LUMINANCE:
1638 case GL_RED:
1639 case GL_ALPHA:
1640 case GL_INTENSITY:
1641 case GL_DEPTH_COMPONENT:
1642 return 1;
1643 case GL_RG:
1644 case GL_LUMINANCE_ALPHA:
1645 case GL_DEPTH_STENCIL:
1646 return 2;
1647 case GL_RGB:
1648 return 3;
1649 case GL_RGBA:
1650 return 4;
1651 default:
1652 return -1;
1653 }
1654 }
1655
1656
1657 /**
1658 * If format is a generic compressed format, return the corresponding
1659 * non-compressed format. For other formats, return the format as-is.
1660 */
1661 GLenum
1662 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1663 {
1664 switch (format) {
1665 case GL_COMPRESSED_RED:
1666 return GL_RED;
1667 case GL_COMPRESSED_RG:
1668 return GL_RG;
1669 case GL_COMPRESSED_RGB:
1670 return GL_RGB;
1671 case GL_COMPRESSED_RGBA:
1672 return GL_RGBA;
1673 case GL_COMPRESSED_ALPHA:
1674 return GL_ALPHA;
1675 case GL_COMPRESSED_LUMINANCE:
1676 return GL_LUMINANCE;
1677 case GL_COMPRESSED_LUMINANCE_ALPHA:
1678 return GL_LUMINANCE_ALPHA;
1679 case GL_COMPRESSED_INTENSITY:
1680 return GL_INTENSITY;
1681 /* sRGB formats */
1682 case GL_COMPRESSED_SRGB:
1683 return GL_SRGB;
1684 case GL_COMPRESSED_SRGB_ALPHA:
1685 return GL_SRGB_ALPHA;
1686 case GL_COMPRESSED_SLUMINANCE:
1687 return GL_SLUMINANCE;
1688 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1689 return GL_SLUMINANCE_ALPHA;
1690 default:
1691 return format;
1692 }
1693 }
1694
1695
1696 /**
1697 * Return the equivalent non-generic internal format.
1698 * This is useful for comparing whether two internal formats are equivalent.
1699 */
1700 GLenum
1701 _mesa_get_nongeneric_internalformat(GLenum format)
1702 {
1703 switch (format) {
1704 /* GL 1.1 formats. */
1705 case 4:
1706 case GL_RGBA:
1707 return GL_RGBA8;
1708 case 3:
1709 case GL_RGB:
1710 return GL_RGB8;
1711 case 2:
1712 case GL_LUMINANCE_ALPHA:
1713 return GL_LUMINANCE8_ALPHA8;
1714 case 1:
1715 case GL_LUMINANCE:
1716 return GL_LUMINANCE8;
1717 case GL_ALPHA:
1718 return GL_ALPHA8;
1719 case GL_INTENSITY:
1720 return GL_INTENSITY8;
1721
1722 /* GL_ARB_texture_rg */
1723 case GL_RED:
1724 return GL_R8;
1725 case GL_RG:
1726 return GL_RG8;
1727
1728 /* GL_EXT_texture_sRGB */
1729 case GL_SRGB:
1730 return GL_SRGB8;
1731 case GL_SRGB_ALPHA:
1732 return GL_SRGB8_ALPHA8;
1733 case GL_SLUMINANCE:
1734 return GL_SLUMINANCE8;
1735 case GL_SLUMINANCE_ALPHA:
1736 return GL_SLUMINANCE8_ALPHA8;
1737
1738 /* GL_EXT_texture_snorm */
1739 case GL_RGBA_SNORM:
1740 return GL_RGBA8_SNORM;
1741 case GL_RGB_SNORM:
1742 return GL_RGB8_SNORM;
1743 case GL_RG_SNORM:
1744 return GL_RG8_SNORM;
1745 case GL_RED_SNORM:
1746 return GL_R8_SNORM;
1747 case GL_LUMINANCE_ALPHA_SNORM:
1748 return GL_LUMINANCE8_ALPHA8_SNORM;
1749 case GL_LUMINANCE_SNORM:
1750 return GL_LUMINANCE8_SNORM;
1751 case GL_ALPHA_SNORM:
1752 return GL_ALPHA8_SNORM;
1753 case GL_INTENSITY_SNORM:
1754 return GL_INTENSITY8_SNORM;
1755
1756 default:
1757 return format;
1758 }
1759 }
1760
1761
1762 /**
1763 * Convert an sRGB internal format to linear.
1764 */
1765 GLenum
1766 _mesa_get_linear_internalformat(GLenum format)
1767 {
1768 switch (format) {
1769 case GL_SRGB:
1770 return GL_RGB;
1771 case GL_SRGB_ALPHA:
1772 return GL_RGBA;
1773 case GL_SRGB8:
1774 return GL_RGB8;
1775 case GL_SRGB8_ALPHA8:
1776 return GL_RGBA8;
1777 case GL_SLUMINANCE8:
1778 return GL_LUMINANCE8;
1779 case GL_SLUMINANCE:
1780 return GL_LUMINANCE;
1781 case GL_SLUMINANCE_ALPHA:
1782 return GL_LUMINANCE_ALPHA;
1783 case GL_SLUMINANCE8_ALPHA8:
1784 return GL_LUMINANCE8_ALPHA8;
1785 default:
1786 return format;
1787 }
1788 }
1789
1790
1791 /**
1792 * Do error checking of format/type combinations for glReadPixels,
1793 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1794 * and type values, we may either generate GL_INVALID_OPERATION or
1795 * GL_INVALID_ENUM.
1796 *
1797 * \param format pixel format.
1798 * \param type pixel type.
1799 *
1800 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1801 */
1802 GLenum
1803 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1804 GLenum format, GLenum type)
1805 {
1806 /* From OpenGL 3.3 spec, page 220:
1807 * "If the format is DEPTH_STENCIL, then values are taken from
1808 * both the depth buffer and the stencil buffer. If there is no
1809 * depth buffer or if there is no stencil buffer, then the error
1810 * INVALID_OPERATION occurs. If the type parameter is not
1811 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1812 * error INVALID_ENUM occurs."
1813 *
1814 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1815 * cannot be used to read depth or stencil in that API.
1816 */
1817 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1818 && type != GL_UNSIGNED_INT_24_8
1819 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1820 return GL_INVALID_ENUM;
1821
1822 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1823 switch (type) {
1824 case GL_BITMAP:
1825 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1826 return GL_INVALID_ENUM;
1827 }
1828 break;
1829
1830 case GL_UNSIGNED_BYTE_3_3_2:
1831 case GL_UNSIGNED_BYTE_2_3_3_REV:
1832 case GL_UNSIGNED_SHORT_5_6_5:
1833 case GL_UNSIGNED_SHORT_5_6_5_REV:
1834 if (format == GL_RGB) {
1835 break; /* OK */
1836 }
1837 if (format == GL_RGB_INTEGER_EXT &&
1838 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1839 break; /* OK */
1840 }
1841 return GL_INVALID_OPERATION;
1842
1843 case GL_UNSIGNED_SHORT_4_4_4_4:
1844 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1845 case GL_UNSIGNED_INT_8_8_8_8:
1846 case GL_UNSIGNED_INT_8_8_8_8_REV:
1847 if (format == GL_RGBA ||
1848 format == GL_BGRA ||
1849 format == GL_ABGR_EXT) {
1850 break; /* OK */
1851 }
1852 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1853 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1854 break; /* OK */
1855 }
1856 return GL_INVALID_OPERATION;
1857
1858 case GL_UNSIGNED_SHORT_5_5_5_1:
1859 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1860 case GL_UNSIGNED_INT_10_10_10_2:
1861 case GL_UNSIGNED_INT_2_10_10_10_REV:
1862 if (format == GL_RGBA ||
1863 format == GL_BGRA) {
1864 break; /* OK */
1865 }
1866 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1867 ctx->Extensions.ARB_texture_rgb10_a2ui) {
1868 break; /* OK */
1869 }
1870 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1871 ctx->API == API_OPENGLES2) {
1872 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1873 }
1874 return GL_INVALID_OPERATION;
1875
1876 case GL_UNSIGNED_INT_24_8:
1877 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1878 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1879 return GL_NO_ERROR;
1880
1881 if (format != GL_DEPTH_STENCIL) {
1882 return GL_INVALID_OPERATION;
1883 }
1884 return GL_NO_ERROR;
1885
1886 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1887 if (!ctx->Extensions.ARB_depth_buffer_float) {
1888 return GL_INVALID_ENUM;
1889 }
1890 if (format != GL_DEPTH_STENCIL) {
1891 return GL_INVALID_OPERATION;
1892 }
1893 return GL_NO_ERROR;
1894
1895 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1896 if (!ctx->Extensions.EXT_packed_float) {
1897 return GL_INVALID_ENUM;
1898 }
1899 if (format != GL_RGB) {
1900 return GL_INVALID_OPERATION;
1901 }
1902 return GL_NO_ERROR;
1903
1904 case GL_HALF_FLOAT_OES:
1905 switch (format) {
1906 case GL_RGBA:
1907 case GL_RGB:
1908 case GL_LUMINANCE_ALPHA:
1909 case GL_LUMINANCE:
1910 case GL_ALPHA:
1911 return GL_NO_ERROR;
1912 case GL_RG:
1913 case GL_RED:
1914 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
1915 return GL_NO_ERROR;
1916 default:
1917 return GL_INVALID_OPERATION;
1918 }
1919
1920 default:
1921 ; /* fall-through */
1922 }
1923
1924 /* now, for each format, check the type for compatibility */
1925 switch (format) {
1926 case GL_COLOR_INDEX:
1927 case GL_STENCIL_INDEX:
1928 switch (type) {
1929 case GL_BITMAP:
1930 case GL_BYTE:
1931 case GL_UNSIGNED_BYTE:
1932 case GL_SHORT:
1933 case GL_UNSIGNED_SHORT:
1934 case GL_INT:
1935 case GL_UNSIGNED_INT:
1936 case GL_FLOAT:
1937 case GL_HALF_FLOAT:
1938 return GL_NO_ERROR;
1939 default:
1940 return GL_INVALID_ENUM;
1941 }
1942
1943 case GL_RED:
1944 case GL_GREEN:
1945 case GL_BLUE:
1946 case GL_ALPHA:
1947 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1948 case GL_INTENSITY:
1949 #endif
1950 case GL_LUMINANCE:
1951 case GL_LUMINANCE_ALPHA:
1952 case GL_DEPTH_COMPONENT:
1953 switch (type) {
1954 case GL_BYTE:
1955 case GL_UNSIGNED_BYTE:
1956 case GL_SHORT:
1957 case GL_UNSIGNED_SHORT:
1958 case GL_INT:
1959 case GL_UNSIGNED_INT:
1960 case GL_FLOAT:
1961 case GL_HALF_FLOAT:
1962 return GL_NO_ERROR;
1963 default:
1964 return GL_INVALID_ENUM;
1965 }
1966
1967 case GL_RG:
1968 if (!ctx->Extensions.ARB_texture_rg)
1969 return GL_INVALID_ENUM;
1970 switch (type) {
1971 case GL_BYTE:
1972 case GL_UNSIGNED_BYTE:
1973 case GL_SHORT:
1974 case GL_UNSIGNED_SHORT:
1975 case GL_INT:
1976 case GL_UNSIGNED_INT:
1977 case GL_FLOAT:
1978 case GL_HALF_FLOAT:
1979 return GL_NO_ERROR;
1980 default:
1981 return GL_INVALID_ENUM;
1982 }
1983
1984 case GL_RGB:
1985 switch (type) {
1986 case GL_BYTE:
1987 case GL_UNSIGNED_BYTE:
1988 case GL_SHORT:
1989 case GL_UNSIGNED_SHORT:
1990 case GL_INT:
1991 case GL_UNSIGNED_INT:
1992 case GL_FLOAT:
1993 case GL_UNSIGNED_BYTE_3_3_2:
1994 case GL_UNSIGNED_BYTE_2_3_3_REV:
1995 case GL_UNSIGNED_SHORT_5_6_5:
1996 case GL_UNSIGNED_SHORT_5_6_5_REV:
1997 case GL_HALF_FLOAT:
1998 return GL_NO_ERROR;
1999 case GL_UNSIGNED_INT_2_10_10_10_REV:
2000 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
2001 return (ctx->API == API_OPENGLES2)
2002 ? GL_NO_ERROR : GL_INVALID_ENUM;
2003 case GL_UNSIGNED_INT_5_9_9_9_REV:
2004 return ctx->Extensions.EXT_texture_shared_exponent
2005 ? GL_NO_ERROR : GL_INVALID_ENUM;
2006 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2007 return ctx->Extensions.EXT_packed_float
2008 ? GL_NO_ERROR : GL_INVALID_ENUM;
2009 default:
2010 return GL_INVALID_ENUM;
2011 }
2012
2013 case GL_BGR:
2014 switch (type) {
2015 /* NOTE: no packed types are supported with BGR. That's
2016 * intentional, according to the GL spec.
2017 */
2018 case GL_BYTE:
2019 case GL_UNSIGNED_BYTE:
2020 case GL_SHORT:
2021 case GL_UNSIGNED_SHORT:
2022 case GL_INT:
2023 case GL_UNSIGNED_INT:
2024 case GL_FLOAT:
2025 case GL_HALF_FLOAT:
2026 return GL_NO_ERROR;
2027 default:
2028 return GL_INVALID_ENUM;
2029 }
2030
2031 case GL_RGBA:
2032 case GL_BGRA:
2033 switch (type) {
2034 case GL_BYTE:
2035 case GL_UNSIGNED_BYTE:
2036 case GL_SHORT:
2037 case GL_UNSIGNED_SHORT:
2038 case GL_INT:
2039 case GL_UNSIGNED_INT:
2040 case GL_FLOAT:
2041 case GL_UNSIGNED_SHORT_4_4_4_4:
2042 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2043 case GL_UNSIGNED_SHORT_5_5_5_1:
2044 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2045 case GL_UNSIGNED_INT_8_8_8_8:
2046 case GL_UNSIGNED_INT_8_8_8_8_REV:
2047 case GL_UNSIGNED_INT_10_10_10_2:
2048 case GL_UNSIGNED_INT_2_10_10_10_REV:
2049 case GL_HALF_FLOAT:
2050 return GL_NO_ERROR;
2051 default:
2052 return GL_INVALID_ENUM;
2053 }
2054
2055 case GL_ABGR_EXT:
2056 switch (type) {
2057 case GL_BYTE:
2058 case GL_UNSIGNED_BYTE:
2059 case GL_SHORT:
2060 case GL_UNSIGNED_SHORT:
2061 case GL_INT:
2062 case GL_UNSIGNED_INT:
2063 case GL_FLOAT:
2064 case GL_UNSIGNED_SHORT_4_4_4_4:
2065 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2066 case GL_UNSIGNED_INT_8_8_8_8:
2067 case GL_UNSIGNED_INT_8_8_8_8_REV:
2068 case GL_HALF_FLOAT:
2069 return GL_NO_ERROR;
2070 default:
2071 return GL_INVALID_ENUM;
2072 }
2073
2074 case GL_YCBCR_MESA:
2075 if (!ctx->Extensions.MESA_ycbcr_texture)
2076 return GL_INVALID_ENUM;
2077 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2078 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2079 return GL_NO_ERROR;
2080 else
2081 return GL_INVALID_OPERATION;
2082
2083 case GL_DEPTH_STENCIL:
2084 if (type == GL_UNSIGNED_INT_24_8)
2085 return GL_NO_ERROR;
2086 else if (ctx->Extensions.ARB_depth_buffer_float &&
2087 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2088 return GL_NO_ERROR;
2089 else
2090 return GL_INVALID_ENUM;
2091
2092 /* integer-valued formats */
2093 case GL_RED_INTEGER_EXT:
2094 case GL_GREEN_INTEGER_EXT:
2095 case GL_BLUE_INTEGER_EXT:
2096 case GL_ALPHA_INTEGER_EXT:
2097 case GL_RG_INTEGER:
2098 switch (type) {
2099 case GL_BYTE:
2100 case GL_UNSIGNED_BYTE:
2101 case GL_SHORT:
2102 case GL_UNSIGNED_SHORT:
2103 case GL_INT:
2104 case GL_UNSIGNED_INT:
2105 return (ctx->Version >= 30 ||
2106 ctx->Extensions.EXT_texture_integer)
2107 ? GL_NO_ERROR : GL_INVALID_ENUM;
2108 default:
2109 return GL_INVALID_ENUM;
2110 }
2111
2112 case GL_RGB_INTEGER_EXT:
2113 switch (type) {
2114 case GL_BYTE:
2115 case GL_UNSIGNED_BYTE:
2116 case GL_SHORT:
2117 case GL_UNSIGNED_SHORT:
2118 case GL_INT:
2119 case GL_UNSIGNED_INT:
2120 return (ctx->Version >= 30 ||
2121 ctx->Extensions.EXT_texture_integer)
2122 ? GL_NO_ERROR : GL_INVALID_ENUM;
2123 case GL_UNSIGNED_BYTE_3_3_2:
2124 case GL_UNSIGNED_BYTE_2_3_3_REV:
2125 case GL_UNSIGNED_SHORT_5_6_5:
2126 case GL_UNSIGNED_SHORT_5_6_5_REV:
2127 return ctx->Extensions.ARB_texture_rgb10_a2ui
2128 ? GL_NO_ERROR : GL_INVALID_ENUM;
2129 default:
2130 return GL_INVALID_ENUM;
2131 }
2132
2133 case GL_BGR_INTEGER_EXT:
2134 switch (type) {
2135 case GL_BYTE:
2136 case GL_UNSIGNED_BYTE:
2137 case GL_SHORT:
2138 case GL_UNSIGNED_SHORT:
2139 case GL_INT:
2140 case GL_UNSIGNED_INT:
2141 /* NOTE: no packed formats w/ BGR format */
2142 return (ctx->Version >= 30 ||
2143 ctx->Extensions.EXT_texture_integer)
2144 ? GL_NO_ERROR : GL_INVALID_ENUM;
2145 default:
2146 return GL_INVALID_ENUM;
2147 }
2148
2149 case GL_RGBA_INTEGER_EXT:
2150 case GL_BGRA_INTEGER_EXT:
2151 switch (type) {
2152 case GL_BYTE:
2153 case GL_UNSIGNED_BYTE:
2154 case GL_SHORT:
2155 case GL_UNSIGNED_SHORT:
2156 case GL_INT:
2157 case GL_UNSIGNED_INT:
2158 return (ctx->Version >= 30 ||
2159 ctx->Extensions.EXT_texture_integer)
2160 ? GL_NO_ERROR : GL_INVALID_ENUM;
2161 case GL_UNSIGNED_SHORT_4_4_4_4:
2162 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2163 case GL_UNSIGNED_SHORT_5_5_5_1:
2164 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2165 case GL_UNSIGNED_INT_8_8_8_8:
2166 case GL_UNSIGNED_INT_8_8_8_8_REV:
2167 case GL_UNSIGNED_INT_10_10_10_2:
2168 case GL_UNSIGNED_INT_2_10_10_10_REV:
2169 return ctx->Extensions.ARB_texture_rgb10_a2ui
2170 ? GL_NO_ERROR : GL_INVALID_ENUM;
2171 default:
2172 return GL_INVALID_ENUM;
2173 }
2174
2175 case GL_LUMINANCE_INTEGER_EXT:
2176 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2177 switch (type) {
2178 case GL_BYTE:
2179 case GL_UNSIGNED_BYTE:
2180 case GL_SHORT:
2181 case GL_UNSIGNED_SHORT:
2182 case GL_INT:
2183 case GL_UNSIGNED_INT:
2184 return ctx->Extensions.EXT_texture_integer
2185 ? GL_NO_ERROR : GL_INVALID_ENUM;
2186 default:
2187 return GL_INVALID_ENUM;
2188 }
2189
2190 default:
2191 return GL_INVALID_ENUM;
2192 }
2193 return GL_NO_ERROR;
2194 }
2195
2196
2197 /**
2198 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2199 * and glTex[Sub]Image.
2200 * \return error code, or GL_NO_ERROR.
2201 */
2202 GLenum
2203 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2204 GLenum format, GLenum type,
2205 unsigned dimensions)
2206 {
2207 GLboolean type_valid = GL_TRUE;
2208
2209 switch (format) {
2210 case GL_RED:
2211 case GL_RG:
2212 if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_texture_rg)
2213 return GL_INVALID_VALUE;
2214 /* fallthrough */
2215 case GL_ALPHA:
2216 case GL_LUMINANCE:
2217 case GL_LUMINANCE_ALPHA:
2218 type_valid = (type == GL_UNSIGNED_BYTE
2219 || type == GL_FLOAT
2220 || type == GL_HALF_FLOAT_OES);
2221 break;
2222
2223 case GL_RGB:
2224 type_valid = (type == GL_UNSIGNED_BYTE
2225 || type == GL_UNSIGNED_SHORT_5_6_5
2226 || type == GL_FLOAT
2227 || type == GL_HALF_FLOAT_OES);
2228 break;
2229
2230 case GL_RGBA:
2231 type_valid = (type == GL_UNSIGNED_BYTE
2232 || type == GL_UNSIGNED_SHORT_4_4_4_4
2233 || type == GL_UNSIGNED_SHORT_5_5_5_1
2234 || type == GL_FLOAT
2235 || type == GL_HALF_FLOAT_OES
2236 || type == GL_UNSIGNED_INT_2_10_10_10_REV);
2237 break;
2238
2239 case GL_DEPTH_COMPONENT:
2240 /* This format is filtered against invalid dimensionalities elsewhere.
2241 */
2242 type_valid = (type == GL_UNSIGNED_SHORT
2243 || type == GL_UNSIGNED_INT);
2244 break;
2245
2246 case GL_DEPTH_STENCIL:
2247 /* This format is filtered against invalid dimensionalities elsewhere.
2248 */
2249 type_valid = (type == GL_UNSIGNED_INT_24_8);
2250 break;
2251
2252 case GL_BGRA_EXT:
2253 type_valid = (type == GL_UNSIGNED_BYTE);
2254
2255 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2256 * the format does not appear to be allowed for 3D textures in OpenGL
2257 * ES.
2258 */
2259 if (dimensions != 2)
2260 return GL_INVALID_VALUE;
2261
2262 break;
2263
2264 default:
2265 return GL_INVALID_VALUE;
2266 }
2267
2268 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2269 }
2270
2271 /**
2272 * Return the simple base format for a given internal texture format.
2273 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2274 *
2275 * \param ctx GL context.
2276 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2277 *
2278 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2279 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2280 *
2281 * This is the format which is used during texture application (i.e. the
2282 * texture format and env mode determine the arithmetic used.
2283 */
2284 GLint
2285 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2286 {
2287 switch (internalFormat) {
2288 case GL_ALPHA:
2289 case GL_ALPHA4:
2290 case GL_ALPHA8:
2291 case GL_ALPHA12:
2292 case GL_ALPHA16:
2293 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2294 case 1:
2295 case GL_LUMINANCE:
2296 case GL_LUMINANCE4:
2297 case GL_LUMINANCE8:
2298 case GL_LUMINANCE12:
2299 case GL_LUMINANCE16:
2300 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2301 case 2:
2302 case GL_LUMINANCE_ALPHA:
2303 case GL_LUMINANCE4_ALPHA4:
2304 case GL_LUMINANCE6_ALPHA2:
2305 case GL_LUMINANCE8_ALPHA8:
2306 case GL_LUMINANCE12_ALPHA4:
2307 case GL_LUMINANCE12_ALPHA12:
2308 case GL_LUMINANCE16_ALPHA16:
2309 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2310 case GL_INTENSITY:
2311 case GL_INTENSITY4:
2312 case GL_INTENSITY8:
2313 case GL_INTENSITY12:
2314 case GL_INTENSITY16:
2315 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2316 case 3:
2317 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2318 case GL_RGB:
2319 case GL_R3_G3_B2:
2320 case GL_RGB4:
2321 case GL_RGB5:
2322 case GL_RGB8:
2323 case GL_RGB10:
2324 case GL_RGB12:
2325 case GL_RGB16:
2326 return GL_RGB;
2327 case 4:
2328 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2329 case GL_RGBA:
2330 case GL_RGBA2:
2331 case GL_RGBA4:
2332 case GL_RGB5_A1:
2333 case GL_RGBA8:
2334 case GL_RGB10_A2:
2335 case GL_RGBA12:
2336 case GL_RGBA16:
2337 return GL_RGBA;
2338 default:
2339 ; /* fallthrough */
2340 }
2341
2342 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2343 */
2344 if (_mesa_is_gles(ctx)) {
2345 switch (internalFormat) {
2346 case GL_BGRA:
2347 return GL_RGBA;
2348 default:
2349 ; /* fallthrough */
2350 }
2351 }
2352
2353 if (ctx->Extensions.ARB_ES2_compatibility) {
2354 switch (internalFormat) {
2355 case GL_RGB565:
2356 return GL_RGB;
2357 default:
2358 ; /* fallthrough */
2359 }
2360 }
2361
2362 if (ctx->Extensions.ARB_depth_texture) {
2363 switch (internalFormat) {
2364 case GL_DEPTH_COMPONENT:
2365 case GL_DEPTH_COMPONENT16:
2366 case GL_DEPTH_COMPONENT24:
2367 case GL_DEPTH_COMPONENT32:
2368 return GL_DEPTH_COMPONENT;
2369 case GL_DEPTH_STENCIL:
2370 case GL_DEPTH24_STENCIL8:
2371 return GL_DEPTH_STENCIL;
2372 default:
2373 ; /* fallthrough */
2374 }
2375 }
2376
2377 if (ctx->Extensions.ARB_texture_stencil8) {
2378 switch (internalFormat) {
2379 case GL_STENCIL_INDEX:
2380 case GL_STENCIL_INDEX1:
2381 case GL_STENCIL_INDEX4:
2382 case GL_STENCIL_INDEX8:
2383 case GL_STENCIL_INDEX16:
2384 return GL_STENCIL_INDEX;
2385 default:
2386 ; /* fallthrough */
2387 }
2388 }
2389
2390 switch (internalFormat) {
2391 case GL_COMPRESSED_ALPHA:
2392 return GL_ALPHA;
2393 case GL_COMPRESSED_LUMINANCE:
2394 return GL_LUMINANCE;
2395 case GL_COMPRESSED_LUMINANCE_ALPHA:
2396 return GL_LUMINANCE_ALPHA;
2397 case GL_COMPRESSED_INTENSITY:
2398 return GL_INTENSITY;
2399 case GL_COMPRESSED_RGB:
2400 return GL_RGB;
2401 case GL_COMPRESSED_RGBA:
2402 return GL_RGBA;
2403 default:
2404 ; /* fallthrough */
2405 }
2406
2407 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2408 GLenum base_compressed =
2409 _mesa_gl_compressed_format_base_format(internalFormat);
2410 if (base_compressed)
2411 return base_compressed;
2412 }
2413
2414 if ((ctx->Extensions.KHR_texture_compression_astc_ldr &&
2415 is_astc_2d_format(internalFormat)) ||
2416 (ctx->Extensions.OES_texture_compression_astc &&
2417 is_astc_3d_format(internalFormat)))
2418 return GL_RGBA;
2419
2420 if (ctx->Extensions.MESA_ycbcr_texture) {
2421 if (internalFormat == GL_YCBCR_MESA)
2422 return GL_YCBCR_MESA;
2423 }
2424
2425 if (ctx->Extensions.ARB_texture_float) {
2426 switch (internalFormat) {
2427 case GL_ALPHA16F_ARB:
2428 case GL_ALPHA32F_ARB:
2429 return GL_ALPHA;
2430 case GL_RGBA16F_ARB:
2431 case GL_RGBA32F_ARB:
2432 return GL_RGBA;
2433 case GL_RGB16F_ARB:
2434 case GL_RGB32F_ARB:
2435 return GL_RGB;
2436 case GL_INTENSITY16F_ARB:
2437 case GL_INTENSITY32F_ARB:
2438 return GL_INTENSITY;
2439 case GL_LUMINANCE16F_ARB:
2440 case GL_LUMINANCE32F_ARB:
2441 return GL_LUMINANCE;
2442 case GL_LUMINANCE_ALPHA16F_ARB:
2443 case GL_LUMINANCE_ALPHA32F_ARB:
2444 return GL_LUMINANCE_ALPHA;
2445 default:
2446 ; /* fallthrough */
2447 }
2448 }
2449
2450 if (ctx->Extensions.EXT_texture_snorm) {
2451 switch (internalFormat) {
2452 case GL_RED_SNORM:
2453 case GL_R8_SNORM:
2454 case GL_R16_SNORM:
2455 return GL_RED;
2456 case GL_RG_SNORM:
2457 case GL_RG8_SNORM:
2458 case GL_RG16_SNORM:
2459 return GL_RG;
2460 case GL_RGB_SNORM:
2461 case GL_RGB8_SNORM:
2462 case GL_RGB16_SNORM:
2463 return GL_RGB;
2464 case GL_RGBA_SNORM:
2465 case GL_RGBA8_SNORM:
2466 case GL_RGBA16_SNORM:
2467 return GL_RGBA;
2468 case GL_ALPHA_SNORM:
2469 case GL_ALPHA8_SNORM:
2470 case GL_ALPHA16_SNORM:
2471 return GL_ALPHA;
2472 case GL_LUMINANCE_SNORM:
2473 case GL_LUMINANCE8_SNORM:
2474 case GL_LUMINANCE16_SNORM:
2475 return GL_LUMINANCE;
2476 case GL_LUMINANCE_ALPHA_SNORM:
2477 case GL_LUMINANCE8_ALPHA8_SNORM:
2478 case GL_LUMINANCE16_ALPHA16_SNORM:
2479 return GL_LUMINANCE_ALPHA;
2480 case GL_INTENSITY_SNORM:
2481 case GL_INTENSITY8_SNORM:
2482 case GL_INTENSITY16_SNORM:
2483 return GL_INTENSITY;
2484 default:
2485 ; /* fallthrough */
2486 }
2487 }
2488
2489 if (ctx->Extensions.EXT_texture_sRGB) {
2490 switch (internalFormat) {
2491 case GL_SRGB_EXT:
2492 case GL_SRGB8_EXT:
2493 case GL_COMPRESSED_SRGB_EXT:
2494 return GL_RGB;
2495 case GL_SRGB_ALPHA_EXT:
2496 case GL_SRGB8_ALPHA8_EXT:
2497 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2498 return GL_RGBA;
2499 case GL_SLUMINANCE_ALPHA_EXT:
2500 case GL_SLUMINANCE8_ALPHA8_EXT:
2501 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2502 return GL_LUMINANCE_ALPHA;
2503 case GL_SLUMINANCE_EXT:
2504 case GL_SLUMINANCE8_EXT:
2505 case GL_COMPRESSED_SLUMINANCE_EXT:
2506 return GL_LUMINANCE;
2507 default:
2508 ; /* fallthrough */
2509 }
2510 }
2511
2512 if (ctx->Version >= 30 ||
2513 ctx->Extensions.EXT_texture_integer) {
2514 switch (internalFormat) {
2515 case GL_RGBA8UI_EXT:
2516 case GL_RGBA16UI_EXT:
2517 case GL_RGBA32UI_EXT:
2518 case GL_RGBA8I_EXT:
2519 case GL_RGBA16I_EXT:
2520 case GL_RGBA32I_EXT:
2521 case GL_RGB10_A2UI:
2522 return GL_RGBA;
2523 case GL_RGB8UI_EXT:
2524 case GL_RGB16UI_EXT:
2525 case GL_RGB32UI_EXT:
2526 case GL_RGB8I_EXT:
2527 case GL_RGB16I_EXT:
2528 case GL_RGB32I_EXT:
2529 return GL_RGB;
2530 }
2531 }
2532
2533 if (ctx->Extensions.EXT_texture_integer) {
2534 switch (internalFormat) {
2535 case GL_ALPHA8UI_EXT:
2536 case GL_ALPHA16UI_EXT:
2537 case GL_ALPHA32UI_EXT:
2538 case GL_ALPHA8I_EXT:
2539 case GL_ALPHA16I_EXT:
2540 case GL_ALPHA32I_EXT:
2541 return GL_ALPHA;
2542 case GL_INTENSITY8UI_EXT:
2543 case GL_INTENSITY16UI_EXT:
2544 case GL_INTENSITY32UI_EXT:
2545 case GL_INTENSITY8I_EXT:
2546 case GL_INTENSITY16I_EXT:
2547 case GL_INTENSITY32I_EXT:
2548 return GL_INTENSITY;
2549 case GL_LUMINANCE8UI_EXT:
2550 case GL_LUMINANCE16UI_EXT:
2551 case GL_LUMINANCE32UI_EXT:
2552 case GL_LUMINANCE8I_EXT:
2553 case GL_LUMINANCE16I_EXT:
2554 case GL_LUMINANCE32I_EXT:
2555 return GL_LUMINANCE;
2556 case GL_LUMINANCE_ALPHA8UI_EXT:
2557 case GL_LUMINANCE_ALPHA16UI_EXT:
2558 case GL_LUMINANCE_ALPHA32UI_EXT:
2559 case GL_LUMINANCE_ALPHA8I_EXT:
2560 case GL_LUMINANCE_ALPHA16I_EXT:
2561 case GL_LUMINANCE_ALPHA32I_EXT:
2562 return GL_LUMINANCE_ALPHA;
2563 default:
2564 ; /* fallthrough */
2565 }
2566 }
2567
2568 if (ctx->Extensions.ARB_texture_rg) {
2569 switch (internalFormat) {
2570 case GL_R16F:
2571 case GL_R32F:
2572 if (!ctx->Extensions.ARB_texture_float)
2573 break;
2574 return GL_RED;
2575 case GL_R8I:
2576 case GL_R8UI:
2577 case GL_R16I:
2578 case GL_R16UI:
2579 case GL_R32I:
2580 case GL_R32UI:
2581 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2582 break;
2583 /* FALLTHROUGH */
2584 case GL_R8:
2585 case GL_R16:
2586 case GL_RED:
2587 case GL_COMPRESSED_RED:
2588 return GL_RED;
2589
2590 case GL_RG16F:
2591 case GL_RG32F:
2592 if (!ctx->Extensions.ARB_texture_float)
2593 break;
2594 return GL_RG;
2595 case GL_RG8I:
2596 case GL_RG8UI:
2597 case GL_RG16I:
2598 case GL_RG16UI:
2599 case GL_RG32I:
2600 case GL_RG32UI:
2601 if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
2602 break;
2603 /* FALLTHROUGH */
2604 case GL_RG:
2605 case GL_RG8:
2606 case GL_RG16:
2607 case GL_COMPRESSED_RG:
2608 return GL_RG;
2609 default:
2610 ; /* fallthrough */
2611 }
2612 }
2613
2614 if (ctx->Extensions.EXT_texture_shared_exponent) {
2615 switch (internalFormat) {
2616 case GL_RGB9_E5_EXT:
2617 return GL_RGB;
2618 default:
2619 ; /* fallthrough */
2620 }
2621 }
2622
2623 if (ctx->Extensions.EXT_packed_float) {
2624 switch (internalFormat) {
2625 case GL_R11F_G11F_B10F_EXT:
2626 return GL_RGB;
2627 default:
2628 ; /* fallthrough */
2629 }
2630 }
2631
2632 if (ctx->Extensions.ARB_depth_buffer_float) {
2633 switch (internalFormat) {
2634 case GL_DEPTH_COMPONENT32F:
2635 return GL_DEPTH_COMPONENT;
2636 case GL_DEPTH32F_STENCIL8:
2637 return GL_DEPTH_STENCIL;
2638 default:
2639 ; /* fallthrough */
2640 }
2641 }
2642
2643 return -1; /* error */
2644 }
2645
2646 /**
2647 * Returns the effective internal format from a texture format and type.
2648 * This is used by texture image operations internally for validation, when
2649 * the specified internal format is a base (unsized) format.
2650 *
2651 * This method will only return a valid effective internal format if the
2652 * combination of format, type and internal format in base form, is acceptable.
2653 *
2654 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2655 * in extensions, to unambiguously correspond to the given base format, then
2656 * that internal format is returned as the effective. Otherwise, if the
2657 * combination is accepted but a single effective format is not defined, the
2658 * passed base format will be returned instead.
2659 *
2660 * \param format the texture format
2661 * \param type the texture type
2662 */
2663 static GLenum
2664 _mesa_es3_effective_internal_format_for_format_and_type(GLenum format,
2665 GLenum type)
2666 {
2667 switch (type) {
2668 case GL_UNSIGNED_BYTE:
2669 switch (format) {
2670 case GL_RGBA:
2671 return GL_RGBA8;
2672 case GL_RGB:
2673 return GL_RGB8;
2674 case GL_RG:
2675 return GL_RG8;
2676 case GL_RED:
2677 return GL_R8;
2678 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2679 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2680 * internal formats, they do not correspond to GL constants, so the base
2681 * format is returned instead.
2682 */
2683 case GL_BGRA_EXT:
2684 case GL_LUMINANCE_ALPHA:
2685 case GL_LUMINANCE:
2686 case GL_ALPHA:
2687 return format;
2688 }
2689 break;
2690
2691 case GL_UNSIGNED_SHORT_4_4_4_4:
2692 if (format == GL_RGBA)
2693 return GL_RGBA4;
2694 break;
2695
2696 case GL_UNSIGNED_SHORT_5_5_5_1:
2697 if (format == GL_RGBA)
2698 return GL_RGB5_A1;
2699 break;
2700
2701 case GL_UNSIGNED_SHORT_5_6_5:
2702 if (format == GL_RGB)
2703 return GL_RGB565;
2704 break;
2705
2706 /* OES_packed_depth_stencil */
2707 case GL_UNSIGNED_INT_24_8:
2708 if (format == GL_DEPTH_STENCIL)
2709 return GL_DEPTH24_STENCIL8;
2710 break;
2711
2712 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2713 if (format == GL_DEPTH_STENCIL)
2714 return GL_DEPTH32F_STENCIL8;
2715 break;
2716
2717 case GL_UNSIGNED_SHORT:
2718 if (format == GL_DEPTH_COMPONENT)
2719 return GL_DEPTH_COMPONENT16;
2720 break;
2721
2722 case GL_UNSIGNED_INT:
2723 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2724 * the format.
2725 */
2726 if (format == GL_DEPTH_COMPONENT)
2727 return format;
2728 break;
2729
2730 /* OES_texture_float and OES_texture_half_float */
2731 case GL_FLOAT:
2732 if (format == GL_DEPTH_COMPONENT)
2733 return GL_DEPTH_COMPONENT32F;
2734 /* fall through */
2735 case GL_HALF_FLOAT_OES:
2736 switch (format) {
2737 case GL_RGBA:
2738 case GL_RGB:
2739 case GL_LUMINANCE_ALPHA:
2740 case GL_LUMINANCE:
2741 case GL_ALPHA:
2742 case GL_RED:
2743 case GL_RG:
2744 return format;
2745 }
2746 break;
2747 case GL_HALF_FLOAT:
2748 switch (format) {
2749 case GL_RG:
2750 case GL_RED:
2751 return format;
2752 }
2753 break;
2754
2755 /* GL_EXT_texture_type_2_10_10_10_REV */
2756 case GL_UNSIGNED_INT_2_10_10_10_REV:
2757 switch (format) {
2758 case GL_RGBA:
2759 case GL_RGB:
2760 return format;
2761 }
2762 break;
2763
2764 default:
2765 /* fall through and return NONE */
2766 break;
2767 }
2768
2769 return GL_NONE;
2770 }
2771
2772 /**
2773 * Do error checking of format/type combinations for OpenGL ES 3
2774 * glTex[Sub]Image.
2775 * \return error code, or GL_NO_ERROR.
2776 */
2777 GLenum
2778 _mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
2779 GLenum format, GLenum type,
2780 GLenum internalFormat)
2781 {
2782 /* If internalFormat is an unsized format, then the effective internal
2783 * format derived from format and type should be used instead. Page 127,
2784 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2785 *
2786 * "if internalformat is a base internal format, the effective
2787 * internal format is a sized internal format that is derived
2788 * from the format and type for internal use by the GL.
2789 * Table 3.12 specifies the mapping of format and type to effective
2790 * internal formats. The effective internal format is used by the GL
2791 * for purposes such as texture completeness or type checks for
2792 * CopyTex* commands. In these cases, the GL is required to operate
2793 * as if the effective internal format was used as the internalformat
2794 * when specifying the texture data."
2795 */
2796 if (_mesa_is_enum_format_unsized(internalFormat)) {
2797 GLenum effectiveInternalFormat =
2798 _mesa_es3_effective_internal_format_for_format_and_type(format, type);
2799
2800 if (effectiveInternalFormat == GL_NONE)
2801 return GL_INVALID_OPERATION;
2802
2803 GLenum baseInternalFormat;
2804 if (internalFormat == GL_BGRA_EXT) {
2805 /* Unfortunately, _mesa_base_tex_format returns a base format of
2806 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2807 * asking the question, "what channels does this format have?"
2808 * However, if we're trying to determine if two internal formats
2809 * match in the ES3 sense, we actually want GL_BGRA.
2810 */
2811 baseInternalFormat = GL_BGRA_EXT;
2812 } else {
2813 baseInternalFormat =
2814 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2815 }
2816
2817 if (internalFormat != baseInternalFormat)
2818 return GL_INVALID_OPERATION;
2819
2820 internalFormat = effectiveInternalFormat;
2821 }
2822
2823 switch (format) {
2824 case GL_BGRA_EXT:
2825 if (type != GL_UNSIGNED_BYTE || internalFormat != GL_BGRA)
2826 return GL_INVALID_OPERATION;
2827 break;
2828
2829 case GL_RGBA:
2830 switch (type) {
2831 case GL_UNSIGNED_BYTE:
2832 switch (internalFormat) {
2833 case GL_RGBA:
2834 case GL_RGBA8:
2835 case GL_RGB5_A1:
2836 case GL_RGBA4:
2837 case GL_SRGB8_ALPHA8_EXT:
2838 break;
2839 default:
2840 return GL_INVALID_OPERATION;
2841 }
2842 break;
2843
2844 case GL_BYTE:
2845 if (internalFormat != GL_RGBA8_SNORM)
2846 return GL_INVALID_OPERATION;
2847 break;
2848
2849 case GL_UNSIGNED_SHORT_4_4_4_4:
2850 switch (internalFormat) {
2851 case GL_RGBA:
2852 case GL_RGBA4:
2853 break;
2854 default:
2855 return GL_INVALID_OPERATION;
2856 }
2857 break;
2858
2859 case GL_UNSIGNED_SHORT_5_5_5_1:
2860 switch (internalFormat) {
2861 case GL_RGBA:
2862 case GL_RGB5_A1:
2863 break;
2864 default:
2865 return GL_INVALID_OPERATION;
2866 }
2867 break;
2868
2869 case GL_UNSIGNED_INT_2_10_10_10_REV:
2870 switch (internalFormat) {
2871 case GL_RGBA: /* GL_EXT_texture_type_2_10_10_10_REV */
2872 case GL_RGB10_A2:
2873 case GL_RGB5_A1:
2874 break;
2875 default:
2876 return GL_INVALID_OPERATION;
2877 }
2878 break;
2879
2880 case GL_HALF_FLOAT:
2881 if (internalFormat != GL_RGBA16F)
2882 return GL_INVALID_OPERATION;
2883 break;
2884
2885 case GL_FLOAT:
2886 switch (internalFormat) {
2887 case GL_RGBA16F:
2888 case GL_RGBA32F:
2889 break;
2890 case GL_RGBA:
2891 if (ctx->Extensions.OES_texture_float && internalFormat == format)
2892 break;
2893 default:
2894 return GL_INVALID_OPERATION;
2895 }
2896 break;
2897
2898 case GL_HALF_FLOAT_OES:
2899 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
2900 break;
2901 default:
2902 return GL_INVALID_OPERATION;
2903 }
2904 break;
2905
2906 case GL_RGBA_INTEGER:
2907 switch (type) {
2908 case GL_UNSIGNED_BYTE:
2909 if (internalFormat != GL_RGBA8UI)
2910 return GL_INVALID_OPERATION;
2911 break;
2912
2913 case GL_BYTE:
2914 if (internalFormat != GL_RGBA8I)
2915 return GL_INVALID_OPERATION;
2916 break;
2917
2918 case GL_UNSIGNED_SHORT:
2919 if (internalFormat != GL_RGBA16UI)
2920 return GL_INVALID_OPERATION;
2921 break;
2922
2923 case GL_SHORT:
2924 if (internalFormat != GL_RGBA16I)
2925 return GL_INVALID_OPERATION;
2926 break;
2927
2928 case GL_UNSIGNED_INT:
2929 if (internalFormat != GL_RGBA32UI)
2930 return GL_INVALID_OPERATION;
2931 break;
2932
2933 case GL_INT:
2934 if (internalFormat != GL_RGBA32I)
2935 return GL_INVALID_OPERATION;
2936 break;
2937
2938 case GL_UNSIGNED_INT_2_10_10_10_REV:
2939 if (internalFormat != GL_RGB10_A2UI)
2940 return GL_INVALID_OPERATION;
2941 break;
2942
2943 default:
2944 return GL_INVALID_OPERATION;
2945 }
2946 break;
2947
2948 case GL_RGB:
2949 switch (type) {
2950 case GL_UNSIGNED_BYTE:
2951 switch (internalFormat) {
2952 case GL_RGB:
2953 case GL_RGB8:
2954 case GL_RGB565:
2955 case GL_SRGB8:
2956 break;
2957 default:
2958 return GL_INVALID_OPERATION;
2959 }
2960 break;
2961
2962 case GL_BYTE:
2963 if (internalFormat != GL_RGB8_SNORM)
2964 return GL_INVALID_OPERATION;
2965 break;
2966
2967 case GL_UNSIGNED_SHORT_5_6_5:
2968 switch (internalFormat) {
2969 case GL_RGB:
2970 case GL_RGB565:
2971 break;
2972 default:
2973 return GL_INVALID_OPERATION;
2974 }
2975 break;
2976
2977 case GL_UNSIGNED_INT_10F_11F_11F_REV:
2978 if (internalFormat != GL_R11F_G11F_B10F)
2979 return GL_INVALID_OPERATION;
2980 break;
2981
2982 case GL_UNSIGNED_INT_5_9_9_9_REV:
2983 if (internalFormat != GL_RGB9_E5)
2984 return GL_INVALID_OPERATION;
2985 break;
2986
2987 case GL_HALF_FLOAT:
2988 switch (internalFormat) {
2989 case GL_RGB16F:
2990 case GL_R11F_G11F_B10F:
2991 case GL_RGB9_E5:
2992 break;
2993 default:
2994 return GL_INVALID_OPERATION;
2995 }
2996 break;
2997
2998 case GL_FLOAT:
2999 switch (internalFormat) {
3000 case GL_RGB16F:
3001 case GL_RGB32F:
3002 case GL_R11F_G11F_B10F:
3003 case GL_RGB9_E5:
3004 break;
3005 case GL_RGB:
3006 if (ctx->Extensions.OES_texture_float && internalFormat == format)
3007 break;
3008 default:
3009 return GL_INVALID_OPERATION;
3010 }
3011 break;
3012
3013 case GL_HALF_FLOAT_OES:
3014 if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
3015 return GL_INVALID_OPERATION;
3016 break;
3017
3018 case GL_UNSIGNED_INT_2_10_10_10_REV:
3019 switch (internalFormat) {
3020 case GL_RGB: /* GL_EXT_texture_type_2_10_10_10_REV */
3021 break;
3022 default:
3023 return GL_INVALID_OPERATION;
3024 }
3025 break;
3026
3027 default:
3028 return GL_INVALID_OPERATION;
3029 }
3030 break;
3031
3032 case GL_RGB_INTEGER:
3033 switch (type) {
3034 case GL_UNSIGNED_BYTE:
3035 if (internalFormat != GL_RGB8UI)
3036 return GL_INVALID_OPERATION;
3037 break;
3038
3039 case GL_BYTE:
3040 if (internalFormat != GL_RGB8I)
3041 return GL_INVALID_OPERATION;
3042 break;
3043
3044 case GL_UNSIGNED_SHORT:
3045 if (internalFormat != GL_RGB16UI)
3046 return GL_INVALID_OPERATION;
3047 break;
3048
3049 case GL_SHORT:
3050 if (internalFormat != GL_RGB16I)
3051 return GL_INVALID_OPERATION;
3052 break;
3053
3054 case GL_UNSIGNED_INT:
3055 if (internalFormat != GL_RGB32UI)
3056 return GL_INVALID_OPERATION;
3057 break;
3058
3059 case GL_INT:
3060 if (internalFormat != GL_RGB32I)
3061 return GL_INVALID_OPERATION;
3062 break;
3063
3064 default:
3065 return GL_INVALID_OPERATION;
3066 }
3067 break;
3068
3069 case GL_RG:
3070 switch (type) {
3071 case GL_UNSIGNED_BYTE:
3072 if (internalFormat != GL_RG8)
3073 return GL_INVALID_OPERATION;
3074 break;
3075
3076 case GL_BYTE:
3077 if (internalFormat != GL_RG8_SNORM)
3078 return GL_INVALID_OPERATION;
3079 break;
3080
3081 case GL_HALF_FLOAT:
3082 case GL_HALF_FLOAT_OES:
3083 switch (internalFormat) {
3084 case GL_RG16F:
3085 break;
3086 case GL_RG:
3087 if (ctx->Extensions.ARB_texture_rg &&
3088 ctx->Extensions.OES_texture_half_float)
3089 break;
3090 /* fallthrough */
3091 default:
3092 return GL_INVALID_OPERATION;
3093 }
3094 break;
3095
3096 case GL_FLOAT:
3097 switch (internalFormat) {
3098 case GL_RG16F:
3099 case GL_RG32F:
3100 break;
3101 case GL_RG:
3102 if (ctx->Extensions.ARB_texture_rg &&
3103 ctx->Extensions.OES_texture_float)
3104 break;
3105 /* fallthrough */
3106 default:
3107 return GL_INVALID_OPERATION;
3108 }
3109 break;
3110
3111 default:
3112 return GL_INVALID_OPERATION;
3113 }
3114 break;
3115
3116 case GL_RG_INTEGER:
3117 switch (type) {
3118 case GL_UNSIGNED_BYTE:
3119 if (internalFormat != GL_RG8UI)
3120 return GL_INVALID_OPERATION;
3121 break;
3122
3123 case GL_BYTE:
3124 if (internalFormat != GL_RG8I)
3125 return GL_INVALID_OPERATION;
3126 break;
3127
3128 case GL_UNSIGNED_SHORT:
3129 if (internalFormat != GL_RG16UI)
3130 return GL_INVALID_OPERATION;
3131 break;
3132
3133 case GL_SHORT:
3134 if (internalFormat != GL_RG16I)
3135 return GL_INVALID_OPERATION;
3136 break;
3137
3138 case GL_UNSIGNED_INT:
3139 if (internalFormat != GL_RG32UI)
3140 return GL_INVALID_OPERATION;
3141 break;
3142
3143 case GL_INT:
3144 if (internalFormat != GL_RG32I)
3145 return GL_INVALID_OPERATION;
3146 break;
3147
3148 default:
3149 return GL_INVALID_OPERATION;
3150 }
3151 break;
3152
3153 case GL_RED:
3154 switch (type) {
3155 case GL_UNSIGNED_BYTE:
3156 if (internalFormat != GL_R8)
3157 return GL_INVALID_OPERATION;
3158 break;
3159
3160 case GL_BYTE:
3161 if (internalFormat != GL_R8_SNORM)
3162 return GL_INVALID_OPERATION;
3163 break;
3164
3165 case GL_HALF_FLOAT:
3166 case GL_HALF_FLOAT_OES:
3167 switch (internalFormat) {
3168 case GL_R16F:
3169 break;
3170 case GL_RG:
3171 case GL_RED:
3172 if (ctx->Extensions.ARB_texture_rg &&
3173 ctx->Extensions.OES_texture_half_float)
3174 break;
3175 /* fallthrough */
3176 default:
3177 return GL_INVALID_OPERATION;
3178 }
3179 break;
3180
3181 case GL_FLOAT:
3182 switch (internalFormat) {
3183 case GL_R16F:
3184 case GL_R32F:
3185 break;
3186 case GL_RED:
3187 if (ctx->Extensions.ARB_texture_rg &&
3188 ctx->Extensions.OES_texture_float)
3189 break;
3190 /* fallthrough */
3191 default:
3192 return GL_INVALID_OPERATION;
3193 }
3194 break;
3195
3196 default:
3197 return GL_INVALID_OPERATION;
3198 }
3199 break;
3200
3201 case GL_RED_INTEGER:
3202 switch (type) {
3203 case GL_UNSIGNED_BYTE:
3204 if (internalFormat != GL_R8UI)
3205 return GL_INVALID_OPERATION;
3206 break;
3207
3208 case GL_BYTE:
3209 if (internalFormat != GL_R8I)
3210 return GL_INVALID_OPERATION;
3211 break;
3212
3213 case GL_UNSIGNED_SHORT:
3214 if (internalFormat != GL_R16UI)
3215 return GL_INVALID_OPERATION;
3216 break;
3217
3218 case GL_SHORT:
3219 if (internalFormat != GL_R16I)
3220 return GL_INVALID_OPERATION;
3221 break;
3222
3223 case GL_UNSIGNED_INT:
3224 if (internalFormat != GL_R32UI)
3225 return GL_INVALID_OPERATION;
3226 break;
3227
3228 case GL_INT:
3229 if (internalFormat != GL_R32I)
3230 return GL_INVALID_OPERATION;
3231 break;
3232
3233 default:
3234 return GL_INVALID_OPERATION;
3235 }
3236 break;
3237
3238 case GL_DEPTH_COMPONENT:
3239 switch (type) {
3240 case GL_UNSIGNED_SHORT:
3241 if (internalFormat != GL_DEPTH_COMPONENT
3242 && internalFormat != GL_DEPTH_COMPONENT16)
3243 return GL_INVALID_OPERATION;
3244 break;
3245
3246 case GL_UNSIGNED_INT:
3247 switch (internalFormat) {
3248 case GL_DEPTH_COMPONENT:
3249 case GL_DEPTH_COMPONENT16:
3250 case GL_DEPTH_COMPONENT24:
3251 break;
3252 default:
3253 return GL_INVALID_OPERATION;
3254 }
3255 break;
3256
3257 case GL_FLOAT:
3258 if (internalFormat != GL_DEPTH_COMPONENT32F)
3259 return GL_INVALID_OPERATION;
3260 break;
3261
3262 default:
3263 return GL_INVALID_OPERATION;
3264 }
3265 break;
3266
3267 case GL_DEPTH_STENCIL:
3268 switch (type) {
3269 case GL_UNSIGNED_INT_24_8:
3270 if (internalFormat != GL_DEPTH_STENCIL
3271 && internalFormat != GL_DEPTH24_STENCIL8)
3272 return GL_INVALID_OPERATION;
3273 break;
3274
3275 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3276 if (internalFormat != GL_DEPTH32F_STENCIL8)
3277 return GL_INVALID_OPERATION;
3278 break;
3279
3280 default:
3281 return GL_INVALID_OPERATION;
3282 }
3283 break;
3284
3285 case GL_STENCIL_INDEX:
3286 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3287 type != GL_UNSIGNED_BYTE ||
3288 internalFormat != GL_STENCIL_INDEX8) {
3289 return GL_INVALID_OPERATION;
3290 }
3291 break;
3292
3293 case GL_ALPHA:
3294 case GL_LUMINANCE:
3295 case GL_LUMINANCE_ALPHA:
3296 switch (type) {
3297 case GL_FLOAT:
3298 if (ctx->Extensions.OES_texture_float && internalFormat == format)
3299 break;
3300 case GL_HALF_FLOAT_OES:
3301 if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
3302 break;
3303 default:
3304 if (type != GL_UNSIGNED_BYTE || format != internalFormat)
3305 return GL_INVALID_OPERATION;
3306 }
3307 }
3308
3309 return GL_NO_ERROR;
3310 }
3311
3312 static void
3313 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3314 {
3315 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3316 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3317 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3318 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3319 }
3320
3321 static bool
3322 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3323 {
3324 switch (format) {
3325 case GL_RGBA:
3326 case GL_RGBA_INTEGER_EXT:
3327 set_swizzle(swizzle, 0, 1, 2, 3);
3328 return true;
3329 case GL_BGRA:
3330 case GL_BGRA_INTEGER_EXT:
3331 set_swizzle(swizzle, 2, 1, 0, 3);
3332 return true;
3333 case GL_ABGR_EXT:
3334 set_swizzle(swizzle, 3, 2, 1, 0);
3335 return true;
3336 case GL_RGB:
3337 case GL_RGB_INTEGER_EXT:
3338 set_swizzle(swizzle, 0, 1, 2, 5);
3339 return true;
3340 case GL_BGR:
3341 case GL_BGR_INTEGER_EXT:
3342 set_swizzle(swizzle, 2, 1, 0, 5);
3343 return true;
3344 case GL_LUMINANCE_ALPHA:
3345 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3346 set_swizzle(swizzle, 0, 0, 0, 1);
3347 return true;
3348 case GL_RG:
3349 case GL_RG_INTEGER:
3350 set_swizzle(swizzle, 0, 1, 4, 5);
3351 return true;
3352 case GL_RED:
3353 case GL_RED_INTEGER_EXT:
3354 set_swizzle(swizzle, 0, 4, 4, 5);
3355 return true;
3356 case GL_GREEN:
3357 case GL_GREEN_INTEGER_EXT:
3358 set_swizzle(swizzle, 4, 0, 4, 5);
3359 return true;
3360 case GL_BLUE:
3361 case GL_BLUE_INTEGER_EXT:
3362 set_swizzle(swizzle, 4, 4, 0, 5);
3363 return true;
3364 case GL_ALPHA:
3365 case GL_ALPHA_INTEGER_EXT:
3366 set_swizzle(swizzle, 4, 4, 4, 0);
3367 return true;
3368 case GL_LUMINANCE:
3369 case GL_LUMINANCE_INTEGER_EXT:
3370 set_swizzle(swizzle, 0, 0, 0, 5);
3371 return true;
3372 case GL_INTENSITY:
3373 set_swizzle(swizzle, 0, 0, 0, 0);
3374 return true;
3375 default:
3376 return false;
3377 }
3378 }
3379
3380 /**
3381 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3382 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3383 * otherwise (for non-array formats).
3384 *
3385 * This function will typically be used to compute a mesa format from a GL type
3386 * so we can then call _mesa_format_convert. This function does
3387 * not consider byte swapping, so it returns types assuming that no byte
3388 * swapping is involved. If byte swapping is involved then clients are supposed
3389 * to handle that on their side before calling _mesa_format_convert.
3390 *
3391 * This function returns an uint32_t that can pack a mesa_format or a
3392 * mesa_array_format. Clients must check the mesa array format bit
3393 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3394 * format is a mesa_array_format or a mesa_format.
3395 */
3396 uint32_t
3397 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3398 {
3399 bool is_array_format = true;
3400 uint8_t swizzle[4];
3401 bool normalized = false, is_float = false, is_signed = false;
3402 int num_channels = 0, type_size = 0;
3403
3404 /* Extract array format type information from the OpenGL data type */
3405 switch (type) {
3406 case GL_UNSIGNED_BYTE:
3407 type_size = 1;
3408 break;
3409 case GL_BYTE:
3410 type_size = 1;
3411 is_signed = true;
3412 break;
3413 case GL_UNSIGNED_SHORT:
3414 type_size = 2;
3415 break;
3416 case GL_SHORT:
3417 type_size = 2;
3418 is_signed = true;
3419 break;
3420 case GL_UNSIGNED_INT:
3421 type_size = 4;
3422 break;
3423 case GL_INT:
3424 type_size = 4;
3425 is_signed = true;
3426 break;
3427 case GL_HALF_FLOAT:
3428 case GL_HALF_FLOAT_OES:
3429 type_size = 2;
3430 is_signed = true;
3431 is_float = true;
3432 break;
3433 case GL_FLOAT:
3434 type_size = 4;
3435 is_signed = true;
3436 is_float = true;
3437 break;
3438 default:
3439 is_array_format = false;
3440 break;
3441 }
3442
3443 /* Extract array format swizzle information from the OpenGL format */
3444 if (is_array_format)
3445 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3446
3447 /* If this is an array format type after checking data type and format,
3448 * create the array format
3449 */
3450 if (is_array_format) {
3451 normalized = !_mesa_is_enum_format_integer(format);
3452 num_channels = _mesa_components_in_format(format);
3453
3454 return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
3455 normalized, num_channels,
3456 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3457 }
3458
3459 /* Otherwise this is not an array format, so return the mesa_format
3460 * matching the OpenGL format and data type
3461 */
3462 switch (type) {
3463 case GL_UNSIGNED_SHORT_5_6_5:
3464 if (format == GL_RGB)
3465 return MESA_FORMAT_B5G6R5_UNORM;
3466 else if (format == GL_BGR)
3467 return MESA_FORMAT_R5G6B5_UNORM;
3468 else if (format == GL_RGB_INTEGER)
3469 return MESA_FORMAT_B5G6R5_UINT;
3470 break;
3471 case GL_UNSIGNED_SHORT_5_6_5_REV:
3472 if (format == GL_RGB)
3473 return MESA_FORMAT_R5G6B5_UNORM;
3474 else if (format == GL_BGR)
3475 return MESA_FORMAT_B5G6R5_UNORM;
3476 else if (format == GL_RGB_INTEGER)
3477 return MESA_FORMAT_R5G6B5_UINT;
3478 break;
3479 case GL_UNSIGNED_SHORT_4_4_4_4:
3480 if (format == GL_RGBA)
3481 return MESA_FORMAT_A4B4G4R4_UNORM;
3482 else if (format == GL_BGRA)
3483 return MESA_FORMAT_A4R4G4B4_UNORM;
3484 else if (format == GL_ABGR_EXT)
3485 return MESA_FORMAT_R4G4B4A4_UNORM;
3486 else if (format == GL_RGBA_INTEGER)
3487 return MESA_FORMAT_A4B4G4R4_UINT;
3488 else if (format == GL_BGRA_INTEGER)
3489 return MESA_FORMAT_A4R4G4B4_UINT;
3490 break;
3491 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3492 if (format == GL_RGBA)
3493 return MESA_FORMAT_R4G4B4A4_UNORM;
3494 else if (format == GL_BGRA)
3495 return MESA_FORMAT_B4G4R4A4_UNORM;
3496 else if (format == GL_ABGR_EXT)
3497 return MESA_FORMAT_A4B4G4R4_UNORM;
3498 else if (format == GL_RGBA_INTEGER)
3499 return MESA_FORMAT_R4G4B4A4_UINT;
3500 else if (format == GL_BGRA_INTEGER)
3501 return MESA_FORMAT_B4G4R4A4_UINT;
3502 break;
3503 case GL_UNSIGNED_SHORT_5_5_5_1:
3504 if (format == GL_RGBA)
3505 return MESA_FORMAT_A1B5G5R5_UNORM;
3506 else if (format == GL_BGRA)
3507 return MESA_FORMAT_A1R5G5B5_UNORM;
3508 else if (format == GL_RGBA_INTEGER)
3509 return MESA_FORMAT_A1B5G5R5_UINT;
3510 else if (format == GL_BGRA_INTEGER)
3511 return MESA_FORMAT_A1R5G5B5_UINT;
3512 break;
3513 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3514 if (format == GL_RGBA)
3515 return MESA_FORMAT_R5G5B5A1_UNORM;
3516 else if (format == GL_BGRA)
3517 return MESA_FORMAT_B5G5R5A1_UNORM;
3518 else if (format == GL_RGBA_INTEGER)
3519 return MESA_FORMAT_R5G5B5A1_UINT;
3520 else if (format == GL_BGRA_INTEGER)
3521 return MESA_FORMAT_B5G5R5A1_UINT;
3522 break;
3523 case GL_UNSIGNED_BYTE_3_3_2:
3524 if (format == GL_RGB)
3525 return MESA_FORMAT_B2G3R3_UNORM;
3526 else if (format == GL_RGB_INTEGER)
3527 return MESA_FORMAT_B2G3R3_UINT;
3528 break;
3529 case GL_UNSIGNED_BYTE_2_3_3_REV:
3530 if (format == GL_RGB)
3531 return MESA_FORMAT_R3G3B2_UNORM;
3532 else if (format == GL_RGB_INTEGER)
3533 return MESA_FORMAT_R3G3B2_UINT;
3534 break;
3535 case GL_UNSIGNED_INT_5_9_9_9_REV:
3536 if (format == GL_RGB)
3537 return MESA_FORMAT_R9G9B9E5_FLOAT;
3538 break;
3539 case GL_UNSIGNED_INT_10_10_10_2:
3540 if (format == GL_RGBA)
3541 return MESA_FORMAT_A2B10G10R10_UNORM;
3542 else if (format == GL_RGBA_INTEGER)
3543 return MESA_FORMAT_A2B10G10R10_UINT;
3544 else if (format == GL_BGRA)
3545 return MESA_FORMAT_A2R10G10B10_UNORM;
3546 else if (format == GL_BGRA_INTEGER)
3547 return MESA_FORMAT_A2R10G10B10_UINT;
3548 break;
3549 case GL_UNSIGNED_INT_2_10_10_10_REV:
3550 if (format == GL_RGB)
3551 return MESA_FORMAT_R10G10B10X2_UNORM;
3552 if (format == GL_RGBA)
3553 return MESA_FORMAT_R10G10B10A2_UNORM;
3554 else if (format == GL_RGBA_INTEGER)
3555 return MESA_FORMAT_R10G10B10A2_UINT;
3556 else if (format == GL_BGRA)
3557 return MESA_FORMAT_B10G10R10A2_UNORM;
3558 else if (format == GL_BGRA_INTEGER)
3559 return MESA_FORMAT_B10G10R10A2_UINT;
3560 break;
3561 case GL_UNSIGNED_INT_8_8_8_8:
3562 if (format == GL_RGBA)
3563 return MESA_FORMAT_A8B8G8R8_UNORM;
3564 else if (format == GL_BGRA)
3565 return MESA_FORMAT_A8R8G8B8_UNORM;
3566 else if (format == GL_ABGR_EXT)
3567 return MESA_FORMAT_R8G8B8A8_UNORM;
3568 else if (format == GL_RGBA_INTEGER)
3569 return MESA_FORMAT_A8B8G8R8_UINT;
3570 else if (format == GL_BGRA_INTEGER)
3571 return MESA_FORMAT_A8R8G8B8_UINT;
3572 break;
3573 case GL_UNSIGNED_INT_8_8_8_8_REV:
3574 if (format == GL_RGBA)
3575 return MESA_FORMAT_R8G8B8A8_UNORM;
3576 else if (format == GL_BGRA)
3577 return MESA_FORMAT_B8G8R8A8_UNORM;
3578 else if (format == GL_ABGR_EXT)
3579 return MESA_FORMAT_A8B8G8R8_UNORM;
3580 else if (format == GL_RGBA_INTEGER)
3581 return MESA_FORMAT_R8G8B8A8_UINT;
3582 else if (format == GL_BGRA_INTEGER)
3583 return MESA_FORMAT_B8G8R8A8_UINT;
3584 break;
3585 case GL_UNSIGNED_SHORT_8_8_MESA:
3586 if (format == GL_YCBCR_MESA)
3587 return MESA_FORMAT_YCBCR;
3588 break;
3589 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3590 if (format == GL_YCBCR_MESA)
3591 return MESA_FORMAT_YCBCR_REV;
3592 break;
3593 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3594 if (format == GL_RGB)
3595 return MESA_FORMAT_R11G11B10_FLOAT;
3596 break;
3597 case GL_FLOAT:
3598 if (format == GL_DEPTH_COMPONENT)
3599 return MESA_FORMAT_Z_FLOAT32;
3600 break;
3601 case GL_UNSIGNED_INT:
3602 if (format == GL_DEPTH_COMPONENT)
3603 return MESA_FORMAT_Z_UNORM32;
3604 break;
3605 case GL_UNSIGNED_SHORT:
3606 if (format == GL_DEPTH_COMPONENT)
3607 return MESA_FORMAT_Z_UNORM16;
3608 break;
3609 case GL_UNSIGNED_INT_24_8:
3610 if (format == GL_DEPTH_STENCIL)
3611 return MESA_FORMAT_Z24_UNORM_S8_UINT;
3612 break;
3613 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3614 if (format == GL_DEPTH_STENCIL)
3615 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3616 break;
3617 default:
3618 break;
3619 }
3620
3621 /* If we got here it means that we could not find a Mesa format that
3622 * matches the GL format/type provided. We may need to add a new Mesa
3623 * format in that case.
3624 */
3625 unreachable("Unsupported format");
3626 }
3627
3628 /**
3629 * Returns true if \p internal_format is a sized internal format that
3630 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
3631 */
3632 bool
3633 _mesa_is_es3_color_renderable(GLenum internal_format)
3634 {
3635 switch (internal_format) {
3636 case GL_R8:
3637 case GL_RG8:
3638 case GL_RGB8:
3639 case GL_RGB565:
3640 case GL_RGBA4:
3641 case GL_RGB5_A1:
3642 case GL_RGBA8:
3643 case GL_RGB10_A2:
3644 case GL_RGB10_A2UI:
3645 case GL_SRGB8_ALPHA8:
3646 case GL_R16F:
3647 case GL_RG16F:
3648 case GL_RGBA16F:
3649 case GL_R32F:
3650 case GL_RG32F:
3651 case GL_RGBA32F:
3652 case GL_R11F_G11F_B10F:
3653 case GL_R8I:
3654 case GL_R8UI:
3655 case GL_R16I:
3656 case GL_R16UI:
3657 case GL_R32I:
3658 case GL_R32UI:
3659 case GL_RG8I:
3660 case GL_RG8UI:
3661 case GL_RG16I:
3662 case GL_RG16UI:
3663 case GL_RG32I:
3664 case GL_RG32UI:
3665 case GL_RGBA8I:
3666 case GL_RGBA8UI:
3667 case GL_RGBA16I:
3668 case GL_RGBA16UI:
3669 case GL_RGBA32I:
3670 case GL_RGBA32UI:
3671 return true;
3672 default:
3673 return false;
3674 }
3675 }
3676
3677 /**
3678 * Returns true if \p internal_format is a sized internal format that
3679 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
3680 */
3681 bool
3682 _mesa_is_es3_texture_filterable(const struct gl_context *ctx,
3683 GLenum internal_format)
3684 {
3685 switch (internal_format) {
3686 case GL_R8:
3687 case GL_R8_SNORM:
3688 case GL_RG8:
3689 case GL_RG8_SNORM:
3690 case GL_RGB8:
3691 case GL_RGB8_SNORM:
3692 case GL_RGB565:
3693 case GL_RGBA4:
3694 case GL_RGB5_A1:
3695 case GL_RGBA8:
3696 case GL_RGBA8_SNORM:
3697 case GL_RGB10_A2:
3698 case GL_SRGB8:
3699 case GL_SRGB8_ALPHA8:
3700 case GL_R16F:
3701 case GL_RG16F:
3702 case GL_RGB16F:
3703 case GL_RGBA16F:
3704 case GL_R11F_G11F_B10F:
3705 case GL_RGB9_E5:
3706 return true;
3707 case GL_R32F:
3708 case GL_RG32F:
3709 case GL_RGB32F:
3710 case GL_RGBA32F:
3711 /* The OES_texture_float_linear spec says:
3712 *
3713 * "When implemented against OpenGL ES 3.0 or later versions, sized
3714 * 32-bit floating-point formats become texture-filterable. This
3715 * should be noted by, for example, checking the ``TF'' column of
3716 * table 8.13 in the ES 3.1 Specification (``Correspondence of sized
3717 * internal formats to base internal formats ... and use cases ...'')
3718 * for the R32F, RG32F, RGB32F, and RGBA32F formats."
3719 */
3720 return ctx->Extensions.OES_texture_float_linear;
3721 default:
3722 return false;
3723 }
3724 }