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