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