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
get_map_idx(GLenum value)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
_mesa_compute_component_mapping(GLenum inFormat,GLenum outFormat,GLubyte * map)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
_mesa_type_is_packed(GLenum type)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
_mesa_sizeof_type(GLenum type)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
_mesa_sizeof_packed_type(GLenum type)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
_mesa_components_in_format(GLenum format)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
_mesa_bytes_per_pixel(GLenum format,GLenum type)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
_mesa_bytes_per_vertex_attrib(GLint comps,GLenum type)534 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
535 {
536 switch (type) {
537 case GL_BYTE:
538 case GL_UNSIGNED_BYTE:
539 return comps * sizeof(GLubyte);
540 case GL_SHORT:
541 case GL_UNSIGNED_SHORT:
542 return comps * sizeof(GLshort);
543 case GL_INT:
544 case GL_UNSIGNED_INT:
545 return comps * sizeof(GLint);
546 case GL_FLOAT:
547 return comps * sizeof(GLfloat);
548 case GL_HALF_FLOAT_ARB:
549 case GL_HALF_FLOAT_OES:
550 return comps * sizeof(GLhalfARB);
551 case GL_DOUBLE:
552 return comps * sizeof(GLdouble);
553 case GL_FIXED:
554 return comps * sizeof(GLfixed);
555 case GL_INT_2_10_10_10_REV:
556 case GL_UNSIGNED_INT_2_10_10_10_REV:
557 if (comps == 4)
558 return sizeof(GLuint);
559 else
560 return -1;
561 case GL_UNSIGNED_INT_10F_11F_11F_REV:
562 if (comps == 3)
563 return sizeof(GLuint);
564 else
565 return -1;
566 case GL_UNSIGNED_INT64_ARB:
567 return comps * 8;
568 default:
569 return -1;
570 }
571 }
572
573 /**
574 * Test if the given format is unsized.
575 */
576 GLboolean
_mesa_is_enum_format_unsized(GLenum format)577 _mesa_is_enum_format_unsized(GLenum format)
578 {
579 switch (format) {
580 case GL_RGBA:
581 case GL_BGRA:
582 case GL_ABGR_EXT:
583 case GL_RGB:
584 case GL_BGR:
585 case GL_RG:
586 case GL_RED:
587 case GL_GREEN:
588 case GL_BLUE:
589 case GL_ALPHA:
590 case GL_INTENSITY:
591 case GL_LUMINANCE:
592 case GL_LUMINANCE_ALPHA:
593
594 case GL_SRGB:
595 case GL_SRGB_ALPHA:
596 case GL_SLUMINANCE:
597 case GL_SLUMINANCE_ALPHA:
598
599 case GL_RGBA_SNORM:
600 case GL_RGB_SNORM:
601 case GL_RG_SNORM:
602 case GL_RED_SNORM:
603 case GL_ALPHA_SNORM:
604 case GL_INTENSITY_SNORM:
605 case GL_LUMINANCE_SNORM:
606 case GL_LUMINANCE_ALPHA_SNORM:
607
608 case GL_RED_INTEGER:
609 case GL_GREEN_INTEGER:
610 case GL_BLUE_INTEGER:
611 case GL_ALPHA_INTEGER:
612 case GL_RGB_INTEGER:
613 case GL_RGBA_INTEGER:
614 case GL_BGR_INTEGER:
615 case GL_BGRA_INTEGER:
616 case GL_RG_INTEGER:
617 case GL_LUMINANCE_INTEGER_EXT:
618 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
619
620 case GL_DEPTH_COMPONENT:
621 case GL_DEPTH_STENCIL:
622 case GL_STENCIL_INDEX:
623 return GL_TRUE;
624 default:
625 return GL_FALSE;
626 }
627 }
628
629 /**
630 * Test if the given format is a UNORM (unsigned-normalized) format.
631 */
632 GLboolean
_mesa_is_enum_format_unorm(GLenum format)633 _mesa_is_enum_format_unorm(GLenum format)
634 {
635 switch(format) {
636 case GL_RED:
637 case GL_GREEN:
638 case GL_BLUE:
639 case GL_ALPHA:
640 case GL_ALPHA4:
641 case GL_ALPHA8:
642 case GL_ALPHA12:
643 case GL_ALPHA16:
644 case 1:
645 case GL_LUMINANCE:
646 case GL_SLUMINANCE:
647 case GL_LUMINANCE4:
648 case GL_LUMINANCE8:
649 case GL_LUMINANCE12:
650 case GL_LUMINANCE16:
651 case 2:
652 case GL_LUMINANCE_ALPHA:
653 case GL_SLUMINANCE_ALPHA:
654 case GL_LUMINANCE4_ALPHA4:
655 case GL_LUMINANCE6_ALPHA2:
656 case GL_LUMINANCE8_ALPHA8:
657 case GL_LUMINANCE12_ALPHA4:
658 case GL_LUMINANCE12_ALPHA12:
659 case GL_LUMINANCE16_ALPHA16:
660 case GL_INTENSITY:
661 case GL_INTENSITY4:
662 case GL_INTENSITY8:
663 case GL_INTENSITY12:
664 case GL_INTENSITY16:
665 case GL_R8:
666 case GL_R16:
667 case GL_RG:
668 case GL_RG8:
669 case GL_RG16:
670 case 3:
671 case GL_RGB:
672 case GL_BGR:
673 case GL_SRGB:
674 case GL_R3_G3_B2:
675 case GL_RGB4:
676 case GL_RGB5:
677 case GL_RGB565:
678 case GL_RGB8:
679 case GL_RGB10:
680 case GL_RGB12:
681 case GL_RGB16:
682 case 4:
683 case GL_ABGR_EXT:
684 case GL_RGBA:
685 case GL_BGRA:
686 case GL_SRGB_ALPHA:
687 case GL_RGBA2:
688 case GL_RGBA4:
689 case GL_RGB5_A1:
690 case GL_RGBA8:
691 case GL_RGB10_A2:
692 case GL_RGBA12:
693 case GL_RGBA16:
694 return GL_TRUE;
695 default:
696 return GL_FALSE;
697 }
698 }
699
700 /**
701 * Test if the given format is a SNORM (signed-normalized) format.
702 */
703 GLboolean
_mesa_is_enum_format_snorm(GLenum format)704 _mesa_is_enum_format_snorm(GLenum format)
705 {
706 switch (format) {
707 /* signed, normalized texture formats */
708 case GL_RED_SNORM:
709 case GL_R8_SNORM:
710 case GL_R16_SNORM:
711 case GL_RG_SNORM:
712 case GL_RG8_SNORM:
713 case GL_RG16_SNORM:
714 case GL_RGB_SNORM:
715 case GL_RGB8_SNORM:
716 case GL_RGB16_SNORM:
717 case GL_RGBA_SNORM:
718 case GL_RGBA8_SNORM:
719 case GL_RGBA16_SNORM:
720 case GL_ALPHA_SNORM:
721 case GL_ALPHA8_SNORM:
722 case GL_ALPHA16_SNORM:
723 case GL_LUMINANCE_SNORM:
724 case GL_LUMINANCE8_SNORM:
725 case GL_LUMINANCE16_SNORM:
726 case GL_LUMINANCE_ALPHA_SNORM:
727 case GL_LUMINANCE8_ALPHA8_SNORM:
728 case GL_LUMINANCE16_ALPHA16_SNORM:
729 case GL_INTENSITY_SNORM:
730 case GL_INTENSITY8_SNORM:
731 case GL_INTENSITY16_SNORM:
732 return GL_TRUE;
733 default:
734 return GL_FALSE;
735 }
736 }
737
738 /**
739 * Test if the given format is an integer (non-normalized) format.
740 */
741 GLboolean
_mesa_is_enum_format_unsigned_int(GLenum format)742 _mesa_is_enum_format_unsigned_int(GLenum format)
743 {
744 switch (format) {
745 /* specific integer formats */
746 case GL_RGBA32UI_EXT:
747 case GL_RGB32UI_EXT:
748 case GL_RG32UI:
749 case GL_R32UI:
750 case GL_ALPHA32UI_EXT:
751 case GL_INTENSITY32UI_EXT:
752 case GL_LUMINANCE32UI_EXT:
753 case GL_LUMINANCE_ALPHA32UI_EXT:
754 case GL_RGBA16UI_EXT:
755 case GL_RGB16UI_EXT:
756 case GL_RG16UI:
757 case GL_R16UI:
758 case GL_ALPHA16UI_EXT:
759 case GL_INTENSITY16UI_EXT:
760 case GL_LUMINANCE16UI_EXT:
761 case GL_LUMINANCE_ALPHA16UI_EXT:
762 case GL_RGBA8UI_EXT:
763 case GL_RGB8UI_EXT:
764 case GL_RG8UI:
765 case GL_R8UI:
766 case GL_ALPHA8UI_EXT:
767 case GL_INTENSITY8UI_EXT:
768 case GL_LUMINANCE8UI_EXT:
769 case GL_LUMINANCE_ALPHA8UI_EXT:
770 case GL_RGB10_A2UI:
771 return GL_TRUE;
772 default:
773 return GL_FALSE;
774 }
775 }
776
777
778 /**
779 * Test if the given format is an integer (non-normalized) format.
780 */
781 GLboolean
_mesa_is_enum_format_signed_int(GLenum format)782 _mesa_is_enum_format_signed_int(GLenum format)
783 {
784 switch (format) {
785 /* generic integer formats */
786 case GL_RED_INTEGER_EXT:
787 case GL_GREEN_INTEGER_EXT:
788 case GL_BLUE_INTEGER_EXT:
789 case GL_ALPHA_INTEGER_EXT:
790 case GL_RGB_INTEGER_EXT:
791 case GL_RGBA_INTEGER_EXT:
792 case GL_BGR_INTEGER_EXT:
793 case GL_BGRA_INTEGER_EXT:
794 case GL_LUMINANCE_INTEGER_EXT:
795 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
796 case GL_RG_INTEGER:
797 /* specific integer formats */
798 case GL_RGBA32I_EXT:
799 case GL_RGB32I_EXT:
800 case GL_RG32I:
801 case GL_R32I:
802 case GL_ALPHA32I_EXT:
803 case GL_INTENSITY32I_EXT:
804 case GL_LUMINANCE32I_EXT:
805 case GL_LUMINANCE_ALPHA32I_EXT:
806 case GL_RGBA16I_EXT:
807 case GL_RGB16I_EXT:
808 case GL_RG16I:
809 case GL_R16I:
810 case GL_ALPHA16I_EXT:
811 case GL_INTENSITY16I_EXT:
812 case GL_LUMINANCE16I_EXT:
813 case GL_LUMINANCE_ALPHA16I_EXT:
814 case GL_RGBA8I_EXT:
815 case GL_RGB8I_EXT:
816 case GL_RG8I:
817 case GL_R8I:
818 case GL_ALPHA8I_EXT:
819 case GL_INTENSITY8I_EXT:
820 case GL_LUMINANCE8I_EXT:
821 case GL_LUMINANCE_ALPHA8I_EXT:
822 return GL_TRUE;
823 default:
824 return GL_FALSE;
825 }
826 }
827
828 /**
829 * Test if the given format is an ASTC 2D format.
830 */
831 static bool
is_astc_2d_format(GLenum internalFormat)832 is_astc_2d_format(GLenum internalFormat)
833 {
834 switch (internalFormat) {
835 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
844 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
845 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
846 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
847 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
848 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
858 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
859 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
860 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
861 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
862 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
863 return true;
864 default:
865 return false;
866 }
867 }
868
869 /**
870 * Test if the given format is an ASTC 3D format.
871 */
872 static bool
is_astc_3d_format(GLenum internalFormat)873 is_astc_3d_format(GLenum internalFormat)
874 {
875 switch (internalFormat) {
876 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
877 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
878 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
879 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
880 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
881 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
882 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
883 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
884 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
885 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
886 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
887 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
888 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
889 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
890 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
891 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
892 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
893 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
894 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
895 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
896 return true;
897 default:
898 return false;
899 }
900 }
901
902 /**
903 * Test if the given format is an ASTC format.
904 */
905 GLboolean
_mesa_is_astc_format(GLenum internalFormat)906 _mesa_is_astc_format(GLenum internalFormat)
907 {
908 return is_astc_2d_format(internalFormat) ||
909 is_astc_3d_format(internalFormat);
910 }
911
912 /**
913 * Test if the given format is an ETC2 format.
914 */
915 GLboolean
_mesa_is_etc2_format(GLenum internalFormat)916 _mesa_is_etc2_format(GLenum internalFormat)
917 {
918 switch (internalFormat) {
919 case GL_COMPRESSED_RGB8_ETC2:
920 case GL_COMPRESSED_SRGB8_ETC2:
921 case GL_COMPRESSED_RGBA8_ETC2_EAC:
922 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
923 case GL_COMPRESSED_R11_EAC:
924 case GL_COMPRESSED_RG11_EAC:
925 case GL_COMPRESSED_SIGNED_R11_EAC:
926 case GL_COMPRESSED_SIGNED_RG11_EAC:
927 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
928 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
929 return true;
930 default:
931 return false;
932 }
933 }
934
935 /**
936 * Test if the given format is an integer (non-normalized) format.
937 */
938 GLboolean
_mesa_is_enum_format_integer(GLenum format)939 _mesa_is_enum_format_integer(GLenum format)
940 {
941 return _mesa_is_enum_format_unsigned_int(format) ||
942 _mesa_is_enum_format_signed_int(format);
943 }
944
945
946 GLboolean
_mesa_is_type_unsigned(GLenum type)947 _mesa_is_type_unsigned(GLenum type)
948 {
949 switch (type) {
950 case GL_UNSIGNED_INT:
951 case GL_UNSIGNED_INT_8_8_8_8:
952 case GL_UNSIGNED_INT_8_8_8_8_REV:
953 case GL_UNSIGNED_INT_10_10_10_2:
954 case GL_UNSIGNED_INT_2_10_10_10_REV:
955
956 case GL_UNSIGNED_SHORT:
957 case GL_UNSIGNED_SHORT_4_4_4_4:
958 case GL_UNSIGNED_SHORT_5_5_5_1:
959 case GL_UNSIGNED_SHORT_5_6_5:
960 case GL_UNSIGNED_SHORT_5_6_5_REV:
961 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
962 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
963 case GL_UNSIGNED_SHORT_8_8_MESA:
964 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
965
966 case GL_UNSIGNED_BYTE:
967 case GL_UNSIGNED_BYTE_3_3_2:
968 case GL_UNSIGNED_BYTE_2_3_3_REV:
969 return GL_TRUE;
970
971 default:
972 return GL_FALSE;
973 }
974 }
975
976
977 /**
978 * Test if the given image format is a color/RGBA format (i.e., not color
979 * index, depth, stencil, etc).
980 * \param format the image format value (may by an internal texture format)
981 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
982 */
983 GLboolean
_mesa_is_color_format(GLenum format)984 _mesa_is_color_format(GLenum format)
985 {
986 switch (format) {
987 case GL_RED:
988 case GL_GREEN:
989 case GL_BLUE:
990 case GL_ALPHA:
991 case GL_ALPHA4:
992 case GL_ALPHA8:
993 case GL_ALPHA12:
994 case GL_ALPHA16:
995 case 1:
996 case GL_LUMINANCE:
997 case GL_LUMINANCE4:
998 case GL_LUMINANCE8:
999 case GL_LUMINANCE12:
1000 case GL_LUMINANCE16:
1001 case 2:
1002 case GL_LUMINANCE_ALPHA:
1003 case GL_LUMINANCE4_ALPHA4:
1004 case GL_LUMINANCE6_ALPHA2:
1005 case GL_LUMINANCE8_ALPHA8:
1006 case GL_LUMINANCE12_ALPHA4:
1007 case GL_LUMINANCE12_ALPHA12:
1008 case GL_LUMINANCE16_ALPHA16:
1009 case GL_INTENSITY:
1010 case GL_INTENSITY4:
1011 case GL_INTENSITY8:
1012 case GL_INTENSITY12:
1013 case GL_INTENSITY16:
1014 case GL_R8:
1015 case GL_R16:
1016 case GL_RG:
1017 case GL_RG8:
1018 case GL_RG16:
1019 case 3:
1020 case GL_RGB:
1021 case GL_BGR:
1022 case GL_R3_G3_B2:
1023 case GL_RGB4:
1024 case GL_RGB5:
1025 case GL_RGB565:
1026 case GL_RGB8:
1027 case GL_RGB10:
1028 case GL_RGB12:
1029 case GL_RGB16:
1030 case 4:
1031 case GL_ABGR_EXT:
1032 case GL_RGBA:
1033 case GL_BGRA:
1034 case GL_RGBA2:
1035 case GL_RGBA4:
1036 case GL_RGB5_A1:
1037 case GL_RGBA8:
1038 case GL_RGB10_A2:
1039 case GL_RGBA12:
1040 case GL_RGBA16:
1041 /* float texture formats */
1042 case GL_ALPHA16F_ARB:
1043 case GL_ALPHA32F_ARB:
1044 case GL_LUMINANCE16F_ARB:
1045 case GL_LUMINANCE32F_ARB:
1046 case GL_LUMINANCE_ALPHA16F_ARB:
1047 case GL_LUMINANCE_ALPHA32F_ARB:
1048 case GL_INTENSITY16F_ARB:
1049 case GL_INTENSITY32F_ARB:
1050 case GL_R16F:
1051 case GL_R32F:
1052 case GL_RG16F:
1053 case GL_RG32F:
1054 case GL_RGB16F_ARB:
1055 case GL_RGB32F_ARB:
1056 case GL_RGBA16F_ARB:
1057 case GL_RGBA32F_ARB:
1058 /* compressed formats */
1059 case GL_COMPRESSED_ALPHA:
1060 case GL_COMPRESSED_LUMINANCE:
1061 case GL_COMPRESSED_LUMINANCE_ALPHA:
1062 case GL_COMPRESSED_INTENSITY:
1063 case GL_COMPRESSED_RED:
1064 case GL_COMPRESSED_RG:
1065 case GL_COMPRESSED_RGB:
1066 case GL_COMPRESSED_RGBA:
1067 case GL_RGB_S3TC:
1068 case GL_RGB4_S3TC:
1069 case GL_RGBA_S3TC:
1070 case GL_RGBA4_S3TC:
1071 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1072 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1073 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1074 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1075 case GL_COMPRESSED_RGB_FXT1_3DFX:
1076 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1077 case GL_SR8_EXT:
1078 case GL_SRG8_EXT:
1079 case GL_SRGB_EXT:
1080 case GL_SRGB8_EXT:
1081 case GL_SRGB_ALPHA_EXT:
1082 case GL_SRGB8_ALPHA8_EXT:
1083 case GL_SLUMINANCE_ALPHA_EXT:
1084 case GL_SLUMINANCE8_ALPHA8_EXT:
1085 case GL_SLUMINANCE_EXT:
1086 case GL_SLUMINANCE8_EXT:
1087 case GL_COMPRESSED_SRGB_EXT:
1088 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1089 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1090 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1091 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1092 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1093 case GL_COMPRESSED_SLUMINANCE_EXT:
1094 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1095 case GL_COMPRESSED_RED_RGTC1:
1096 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1097 case GL_COMPRESSED_RG_RGTC2:
1098 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1099 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1100 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1101 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1102 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1103 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1104 case GL_ETC1_RGB8_OES:
1105 case GL_COMPRESSED_RGB8_ETC2:
1106 case GL_COMPRESSED_SRGB8_ETC2:
1107 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1108 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1109 case GL_COMPRESSED_R11_EAC:
1110 case GL_COMPRESSED_RG11_EAC:
1111 case GL_COMPRESSED_SIGNED_R11_EAC:
1112 case GL_COMPRESSED_SIGNED_RG11_EAC:
1113 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1114 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1115 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1116 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1117 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1118 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1119 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1120 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1121 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1122 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1123 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1124 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1125 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1126 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1127 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1128 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1129 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1130 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1131 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1132 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1133 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1134 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1135 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1136 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1137 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1138 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1139 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1140 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1141 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1142 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1143 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1144 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1145 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1146 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1147 case GL_ATC_RGB_AMD:
1148 case GL_ATC_RGBA_EXPLICIT_ALPHA_AMD:
1149 case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
1150 /* generic integer formats */
1151 case GL_RED_INTEGER_EXT:
1152 case GL_GREEN_INTEGER_EXT:
1153 case GL_BLUE_INTEGER_EXT:
1154 case GL_ALPHA_INTEGER_EXT:
1155 case GL_RGB_INTEGER_EXT:
1156 case GL_RGBA_INTEGER_EXT:
1157 case GL_BGR_INTEGER_EXT:
1158 case GL_BGRA_INTEGER_EXT:
1159 case GL_RG_INTEGER:
1160 case GL_LUMINANCE_INTEGER_EXT:
1161 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1162 /* sized integer formats */
1163 case GL_RGBA32UI_EXT:
1164 case GL_RGB32UI_EXT:
1165 case GL_RG32UI:
1166 case GL_R32UI:
1167 case GL_ALPHA32UI_EXT:
1168 case GL_INTENSITY32UI_EXT:
1169 case GL_LUMINANCE32UI_EXT:
1170 case GL_LUMINANCE_ALPHA32UI_EXT:
1171 case GL_RGBA16UI_EXT:
1172 case GL_RGB16UI_EXT:
1173 case GL_RG16UI:
1174 case GL_R16UI:
1175 case GL_ALPHA16UI_EXT:
1176 case GL_INTENSITY16UI_EXT:
1177 case GL_LUMINANCE16UI_EXT:
1178 case GL_LUMINANCE_ALPHA16UI_EXT:
1179 case GL_RGBA8UI_EXT:
1180 case GL_RGB8UI_EXT:
1181 case GL_RG8UI:
1182 case GL_R8UI:
1183 case GL_ALPHA8UI_EXT:
1184 case GL_INTENSITY8UI_EXT:
1185 case GL_LUMINANCE8UI_EXT:
1186 case GL_LUMINANCE_ALPHA8UI_EXT:
1187 case GL_RGBA32I_EXT:
1188 case GL_RGB32I_EXT:
1189 case GL_RG32I:
1190 case GL_R32I:
1191 case GL_ALPHA32I_EXT:
1192 case GL_INTENSITY32I_EXT:
1193 case GL_LUMINANCE32I_EXT:
1194 case GL_LUMINANCE_ALPHA32I_EXT:
1195 case GL_RGBA16I_EXT:
1196 case GL_RGB16I_EXT:
1197 case GL_RG16I:
1198 case GL_R16I:
1199 case GL_ALPHA16I_EXT:
1200 case GL_INTENSITY16I_EXT:
1201 case GL_LUMINANCE16I_EXT:
1202 case GL_LUMINANCE_ALPHA16I_EXT:
1203 case GL_RGBA8I_EXT:
1204 case GL_RGB8I_EXT:
1205 case GL_RG8I:
1206 case GL_R8I:
1207 case GL_ALPHA8I_EXT:
1208 case GL_INTENSITY8I_EXT:
1209 case GL_LUMINANCE8I_EXT:
1210 case GL_LUMINANCE_ALPHA8I_EXT:
1211 /* signed, normalized texture formats */
1212 case GL_RED_SNORM:
1213 case GL_R8_SNORM:
1214 case GL_R16_SNORM:
1215 case GL_RG_SNORM:
1216 case GL_RG8_SNORM:
1217 case GL_RG16_SNORM:
1218 case GL_RGB_SNORM:
1219 case GL_RGB8_SNORM:
1220 case GL_RGB16_SNORM:
1221 case GL_RGBA_SNORM:
1222 case GL_RGBA8_SNORM:
1223 case GL_RGBA16_SNORM:
1224 case GL_ALPHA_SNORM:
1225 case GL_ALPHA8_SNORM:
1226 case GL_ALPHA16_SNORM:
1227 case GL_LUMINANCE_SNORM:
1228 case GL_LUMINANCE8_SNORM:
1229 case GL_LUMINANCE16_SNORM:
1230 case GL_LUMINANCE_ALPHA_SNORM:
1231 case GL_LUMINANCE8_ALPHA8_SNORM:
1232 case GL_LUMINANCE16_ALPHA16_SNORM:
1233 case GL_INTENSITY_SNORM:
1234 case GL_INTENSITY8_SNORM:
1235 case GL_INTENSITY16_SNORM:
1236 case GL_RGB9_E5:
1237 case GL_R11F_G11F_B10F:
1238 case GL_RGB10_A2UI:
1239 return GL_TRUE;
1240 case GL_YCBCR_MESA: /* not considered to be RGB */
1241 FALLTHROUGH;
1242 default:
1243 return GL_FALSE;
1244 }
1245 }
1246
1247
1248 /**
1249 * Test if the given image format is a depth component format.
1250 */
1251 GLboolean
_mesa_is_depth_format(GLenum format)1252 _mesa_is_depth_format(GLenum format)
1253 {
1254 switch (format) {
1255 case GL_DEPTH_COMPONENT:
1256 case GL_DEPTH_COMPONENT16:
1257 case GL_DEPTH_COMPONENT24:
1258 case GL_DEPTH_COMPONENT32:
1259 case GL_DEPTH_COMPONENT32F:
1260 return GL_TRUE;
1261 default:
1262 return GL_FALSE;
1263 }
1264 }
1265
1266
1267 /**
1268 * Test if the given image format is a stencil format.
1269 */
1270 GLboolean
_mesa_is_stencil_format(GLenum format)1271 _mesa_is_stencil_format(GLenum format)
1272 {
1273 switch (format) {
1274 case GL_STENCIL_INDEX:
1275 return GL_TRUE;
1276 default:
1277 return GL_FALSE;
1278 }
1279 }
1280
1281
1282 /**
1283 * Test if the given image format is a YCbCr format.
1284 */
1285 GLboolean
_mesa_is_ycbcr_format(GLenum format)1286 _mesa_is_ycbcr_format(GLenum format)
1287 {
1288 switch (format) {
1289 case GL_YCBCR_MESA:
1290 return GL_TRUE;
1291 default:
1292 return GL_FALSE;
1293 }
1294 }
1295
1296
1297 /**
1298 * Test if the given image format is a depth+stencil format.
1299 */
1300 GLboolean
_mesa_is_depthstencil_format(GLenum format)1301 _mesa_is_depthstencil_format(GLenum format)
1302 {
1303 switch (format) {
1304 case GL_DEPTH24_STENCIL8_EXT:
1305 case GL_DEPTH_STENCIL_EXT:
1306 case GL_DEPTH32F_STENCIL8:
1307 return GL_TRUE;
1308 default:
1309 return GL_FALSE;
1310 }
1311 }
1312
1313
1314 /**
1315 * Test if the given image format is a depth or stencil format.
1316 */
1317 GLboolean
_mesa_is_depth_or_stencil_format(GLenum format)1318 _mesa_is_depth_or_stencil_format(GLenum format)
1319 {
1320 switch (format) {
1321 case GL_DEPTH_COMPONENT:
1322 case GL_DEPTH_COMPONENT16:
1323 case GL_DEPTH_COMPONENT24:
1324 case GL_DEPTH_COMPONENT32:
1325 case GL_STENCIL_INDEX:
1326 case GL_STENCIL_INDEX1_EXT:
1327 case GL_STENCIL_INDEX4_EXT:
1328 case GL_STENCIL_INDEX8_EXT:
1329 case GL_STENCIL_INDEX16_EXT:
1330 case GL_DEPTH_STENCIL_EXT:
1331 case GL_DEPTH24_STENCIL8_EXT:
1332 case GL_DEPTH_COMPONENT32F:
1333 case GL_DEPTH32F_STENCIL8:
1334 return GL_TRUE;
1335 default:
1336 return GL_FALSE;
1337 }
1338 }
1339
1340 /**
1341 * Test if the given image format has a floating-point depth component.
1342 */
1343 GLboolean
_mesa_has_depth_float_channel(GLenum internalFormat)1344 _mesa_has_depth_float_channel(GLenum internalFormat)
1345 {
1346 return internalFormat == GL_DEPTH32F_STENCIL8 ||
1347 internalFormat == GL_DEPTH_COMPONENT32F;
1348 }
1349
1350 /**
1351 * Test if an image format is a supported compressed format.
1352 * \param format the internal format token provided by the user.
1353 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1354 */
1355 GLboolean
_mesa_is_compressed_format(const struct gl_context * ctx,GLenum format)1356 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1357 {
1358 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1359
1360 /* Some formats in this switch have an equivalent mesa_format_layout
1361 * to the compressed formats in the layout switch below and thus
1362 * must be handled first.
1363 */
1364 switch (format) {
1365 case GL_RGB_S3TC:
1366 case GL_RGB4_S3TC:
1367 case GL_RGBA_S3TC:
1368 case GL_RGBA4_S3TC:
1369 return _mesa_has_S3_s3tc(ctx);
1370 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1371 return _mesa_has_ATI_texture_compression_3dc(ctx);
1372 case GL_PALETTE4_RGB8_OES:
1373 case GL_PALETTE4_RGBA8_OES:
1374 case GL_PALETTE4_R5_G6_B5_OES:
1375 case GL_PALETTE4_RGBA4_OES:
1376 case GL_PALETTE4_RGB5_A1_OES:
1377 case GL_PALETTE8_RGB8_OES:
1378 case GL_PALETTE8_RGBA8_OES:
1379 case GL_PALETTE8_R5_G6_B5_OES:
1380 case GL_PALETTE8_RGBA4_OES:
1381 case GL_PALETTE8_RGB5_A1_OES:
1382 return ctx->API == API_OPENGLES;
1383 }
1384
1385 switch (_mesa_get_format_layout(m_format)) {
1386 case MESA_FORMAT_LAYOUT_S3TC:
1387 if (!_mesa_is_format_srgb(m_format)) {
1388 return _mesa_has_EXT_texture_compression_s3tc(ctx);
1389 } else {
1390 return (_mesa_has_EXT_texture_sRGB(ctx) ||
1391 _mesa_has_EXT_texture_compression_s3tc_srgb(ctx)) &&
1392 _mesa_has_EXT_texture_compression_s3tc(ctx);
1393 }
1394 case MESA_FORMAT_LAYOUT_FXT1:
1395 return _mesa_has_3DFX_texture_compression_FXT1(ctx);
1396 case MESA_FORMAT_LAYOUT_RGTC:
1397 return _mesa_has_ARB_texture_compression_rgtc(ctx) ||
1398 _mesa_has_EXT_texture_compression_rgtc(ctx);
1399 case MESA_FORMAT_LAYOUT_LATC:
1400 return _mesa_has_EXT_texture_compression_latc(ctx);
1401 case MESA_FORMAT_LAYOUT_ETC1:
1402 return _mesa_has_OES_compressed_ETC1_RGB8_texture(ctx);
1403 case MESA_FORMAT_LAYOUT_ETC2:
1404 return _mesa_is_gles3(ctx) || _mesa_has_ARB_ES3_compatibility(ctx);
1405 case MESA_FORMAT_LAYOUT_BPTC:
1406 return _mesa_has_ARB_texture_compression_bptc(ctx) ||
1407 _mesa_has_EXT_texture_compression_bptc(ctx);
1408 case MESA_FORMAT_LAYOUT_ASTC:
1409 return _mesa_has_KHR_texture_compression_astc_ldr(ctx);
1410 case MESA_FORMAT_LAYOUT_ATC:
1411 return _mesa_has_AMD_compressed_ATC_texture(ctx);
1412 default:
1413 return GL_FALSE;
1414 }
1415 }
1416
1417 /**
1418 * Test if the given format represents an sRGB format.
1419 * \param format the GL format (can be an internal format)
1420 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1421 */
1422 GLboolean
_mesa_is_srgb_format(GLenum format)1423 _mesa_is_srgb_format(GLenum format)
1424 {
1425 switch (format) {
1426 case GL_SR8_EXT:
1427 case GL_SRG8_EXT:
1428 case GL_SRGB:
1429 case GL_SRGB8:
1430 case GL_SRGB_ALPHA:
1431 case GL_SRGB8_ALPHA8:
1432 case GL_COMPRESSED_SRGB:
1433 case GL_COMPRESSED_SRGB_ALPHA:
1434 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1435 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1436 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1437 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1438 case GL_COMPRESSED_SRGB8_ETC2:
1439 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1440 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1441 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1442 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1443 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1444 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1445 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1446 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1447 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1448 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1449 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1450 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1451 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1452 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1453 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1454 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1455 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1456 return GL_TRUE;
1457 default:
1458 break;
1459 }
1460
1461 return GL_FALSE;
1462 }
1463
1464 /**
1465 * Convert various unpack formats to the corresponding base format.
1466 */
1467 GLenum
_mesa_unpack_format_to_base_format(GLenum format)1468 _mesa_unpack_format_to_base_format(GLenum format)
1469 {
1470 switch(format) {
1471 case GL_RED_INTEGER:
1472 return GL_RED;
1473 case GL_GREEN_INTEGER:
1474 return GL_GREEN;
1475 case GL_BLUE_INTEGER:
1476 return GL_BLUE;
1477 case GL_ALPHA_INTEGER:
1478 return GL_ALPHA;
1479 case GL_RG_INTEGER:
1480 return GL_RG;
1481 case GL_RGB_INTEGER:
1482 return GL_RGB;
1483 case GL_RGBA_INTEGER:
1484 return GL_RGBA;
1485 case GL_BGR_INTEGER:
1486 return GL_BGR;
1487 case GL_BGRA_INTEGER:
1488 return GL_BGRA;
1489 case GL_LUMINANCE_INTEGER_EXT:
1490 return GL_LUMINANCE;
1491 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1492 return GL_LUMINANCE_ALPHA;
1493 case GL_RED:
1494 case GL_GREEN:
1495 case GL_BLUE:
1496 case GL_RG:
1497 case GL_RGB:
1498 case GL_RGBA:
1499 case GL_BGR:
1500 case GL_BGRA:
1501 case GL_ALPHA:
1502 case GL_LUMINANCE:
1503 case GL_LUMINANCE_ALPHA:
1504 default:
1505 return format;
1506 }
1507 }
1508
1509 /**
1510 * Convert various base formats to the corresponding integer format.
1511 */
1512 GLenum
_mesa_base_format_to_integer_format(GLenum format)1513 _mesa_base_format_to_integer_format(GLenum format)
1514 {
1515 switch(format) {
1516 case GL_RED:
1517 return GL_RED_INTEGER;
1518 case GL_GREEN:
1519 return GL_GREEN_INTEGER;
1520 case GL_BLUE:
1521 return GL_BLUE_INTEGER;
1522 case GL_RG:
1523 return GL_RG_INTEGER;
1524 case GL_RGB:
1525 return GL_RGB_INTEGER;
1526 case GL_RGBA:
1527 return GL_RGBA_INTEGER;
1528 case GL_BGR:
1529 return GL_BGR_INTEGER;
1530 case GL_BGRA:
1531 return GL_BGRA_INTEGER;
1532 case GL_ALPHA:
1533 return GL_ALPHA_INTEGER;
1534 case GL_LUMINANCE:
1535 return GL_LUMINANCE_INTEGER_EXT;
1536 case GL_LUMINANCE_ALPHA:
1537 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1538 }
1539
1540 return format;
1541 }
1542
1543
1544 /**
1545 * Does the given base texture/renderbuffer format have the channel
1546 * named by 'pname'?
1547 */
1548 GLboolean
_mesa_base_format_has_channel(GLenum base_format,GLenum pname)1549 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1550 {
1551 switch (pname) {
1552 case GL_TEXTURE_RED_SIZE:
1553 case GL_TEXTURE_RED_TYPE:
1554 case GL_RENDERBUFFER_RED_SIZE_EXT:
1555 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1556 case GL_INTERNALFORMAT_RED_SIZE:
1557 case GL_INTERNALFORMAT_RED_TYPE:
1558 if (base_format == GL_RED ||
1559 base_format == GL_RG ||
1560 base_format == GL_RGB ||
1561 base_format == GL_RGBA) {
1562 return GL_TRUE;
1563 }
1564 return GL_FALSE;
1565 case GL_TEXTURE_GREEN_SIZE:
1566 case GL_TEXTURE_GREEN_TYPE:
1567 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1568 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1569 case GL_INTERNALFORMAT_GREEN_SIZE:
1570 case GL_INTERNALFORMAT_GREEN_TYPE:
1571 if (base_format == GL_RG ||
1572 base_format == GL_RGB ||
1573 base_format == GL_RGBA) {
1574 return GL_TRUE;
1575 }
1576 return GL_FALSE;
1577 case GL_TEXTURE_BLUE_SIZE:
1578 case GL_TEXTURE_BLUE_TYPE:
1579 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1580 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1581 case GL_INTERNALFORMAT_BLUE_SIZE:
1582 case GL_INTERNALFORMAT_BLUE_TYPE:
1583 if (base_format == GL_RGB ||
1584 base_format == GL_RGBA) {
1585 return GL_TRUE;
1586 }
1587 return GL_FALSE;
1588 case GL_TEXTURE_ALPHA_SIZE:
1589 case GL_TEXTURE_ALPHA_TYPE:
1590 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1591 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1592 case GL_INTERNALFORMAT_ALPHA_SIZE:
1593 case GL_INTERNALFORMAT_ALPHA_TYPE:
1594 if (base_format == GL_RGBA ||
1595 base_format == GL_ALPHA ||
1596 base_format == GL_LUMINANCE_ALPHA) {
1597 return GL_TRUE;
1598 }
1599 return GL_FALSE;
1600 case GL_TEXTURE_LUMINANCE_SIZE:
1601 case GL_TEXTURE_LUMINANCE_TYPE:
1602 if (base_format == GL_LUMINANCE ||
1603 base_format == GL_LUMINANCE_ALPHA) {
1604 return GL_TRUE;
1605 }
1606 return GL_FALSE;
1607 case GL_TEXTURE_INTENSITY_SIZE:
1608 case GL_TEXTURE_INTENSITY_TYPE:
1609 if (base_format == GL_INTENSITY) {
1610 return GL_TRUE;
1611 }
1612 return GL_FALSE;
1613 case GL_TEXTURE_DEPTH_SIZE:
1614 case GL_TEXTURE_DEPTH_TYPE:
1615 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1616 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1617 case GL_INTERNALFORMAT_DEPTH_SIZE:
1618 case GL_INTERNALFORMAT_DEPTH_TYPE:
1619 if (base_format == GL_DEPTH_STENCIL ||
1620 base_format == GL_DEPTH_COMPONENT) {
1621 return GL_TRUE;
1622 }
1623 return GL_FALSE;
1624 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1625 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1626 case GL_INTERNALFORMAT_STENCIL_SIZE:
1627 case GL_INTERNALFORMAT_STENCIL_TYPE:
1628 if (base_format == GL_DEPTH_STENCIL ||
1629 base_format == GL_STENCIL_INDEX) {
1630 return GL_TRUE;
1631 }
1632 return GL_FALSE;
1633 default:
1634 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1635 __func__, pname);
1636 return GL_FALSE;
1637 }
1638
1639 return GL_FALSE;
1640 }
1641
1642
1643 /**
1644 * If format is a generic compressed format, return the corresponding
1645 * non-compressed format. For other formats, return the format as-is.
1646 */
1647 GLenum
_mesa_generic_compressed_format_to_uncompressed_format(GLenum format)1648 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1649 {
1650 switch (format) {
1651 case GL_COMPRESSED_RED:
1652 return GL_RED;
1653 case GL_COMPRESSED_RG:
1654 return GL_RG;
1655 case GL_COMPRESSED_RGB:
1656 return GL_RGB;
1657 case GL_COMPRESSED_RGBA:
1658 return GL_RGBA;
1659 case GL_COMPRESSED_ALPHA:
1660 return GL_ALPHA;
1661 case GL_COMPRESSED_LUMINANCE:
1662 return GL_LUMINANCE;
1663 case GL_COMPRESSED_LUMINANCE_ALPHA:
1664 return GL_LUMINANCE_ALPHA;
1665 case GL_COMPRESSED_INTENSITY:
1666 return GL_INTENSITY;
1667 /* sRGB formats */
1668 case GL_COMPRESSED_SRGB:
1669 return GL_SRGB;
1670 case GL_COMPRESSED_SRGB_ALPHA:
1671 return GL_SRGB_ALPHA;
1672 case GL_COMPRESSED_SLUMINANCE:
1673 return GL_SLUMINANCE;
1674 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1675 return GL_SLUMINANCE_ALPHA;
1676 default:
1677 return format;
1678 }
1679 }
1680
1681
1682 /**
1683 * Return the equivalent non-generic internal format.
1684 * This is useful for comparing whether two internal formats are equivalent.
1685 */
1686 GLenum
_mesa_get_nongeneric_internalformat(GLenum format)1687 _mesa_get_nongeneric_internalformat(GLenum format)
1688 {
1689 switch (format) {
1690 /* GL 1.1 formats. */
1691 case 4:
1692 case GL_RGBA:
1693 return GL_RGBA8;
1694 case 3:
1695 case GL_RGB:
1696 return GL_RGB8;
1697 case 2:
1698 case GL_LUMINANCE_ALPHA:
1699 return GL_LUMINANCE8_ALPHA8;
1700 case 1:
1701 case GL_LUMINANCE:
1702 return GL_LUMINANCE8;
1703 case GL_ALPHA:
1704 return GL_ALPHA8;
1705 case GL_INTENSITY:
1706 return GL_INTENSITY8;
1707
1708 /* GL_ARB_texture_rg */
1709 case GL_RED:
1710 return GL_R8;
1711 case GL_RG:
1712 return GL_RG8;
1713
1714 /* GL_EXT_texture_sRGB */
1715 case GL_SRGB:
1716 return GL_SRGB8;
1717 case GL_SRGB_ALPHA:
1718 return GL_SRGB8_ALPHA8;
1719 case GL_SLUMINANCE:
1720 return GL_SLUMINANCE8;
1721 case GL_SLUMINANCE_ALPHA:
1722 return GL_SLUMINANCE8_ALPHA8;
1723
1724 /* GL_EXT_texture_snorm */
1725 case GL_RGBA_SNORM:
1726 return GL_RGBA8_SNORM;
1727 case GL_RGB_SNORM:
1728 return GL_RGB8_SNORM;
1729 case GL_RG_SNORM:
1730 return GL_RG8_SNORM;
1731 case GL_RED_SNORM:
1732 return GL_R8_SNORM;
1733 case GL_LUMINANCE_ALPHA_SNORM:
1734 return GL_LUMINANCE8_ALPHA8_SNORM;
1735 case GL_LUMINANCE_SNORM:
1736 return GL_LUMINANCE8_SNORM;
1737 case GL_ALPHA_SNORM:
1738 return GL_ALPHA8_SNORM;
1739 case GL_INTENSITY_SNORM:
1740 return GL_INTENSITY8_SNORM;
1741
1742 default:
1743 return format;
1744 }
1745 }
1746
1747
1748 /**
1749 * Convert an sRGB internal format to linear.
1750 */
1751 GLenum
_mesa_get_linear_internalformat(GLenum format)1752 _mesa_get_linear_internalformat(GLenum format)
1753 {
1754 switch (format) {
1755 case GL_SRGB:
1756 return GL_RGB;
1757 case GL_SRGB_ALPHA:
1758 return GL_RGBA;
1759 case GL_SRGB8:
1760 return GL_RGB8;
1761 case GL_SRGB8_ALPHA8:
1762 return GL_RGBA8;
1763 case GL_SLUMINANCE8:
1764 return GL_LUMINANCE8;
1765 case GL_SLUMINANCE:
1766 return GL_LUMINANCE;
1767 case GL_SLUMINANCE_ALPHA:
1768 return GL_LUMINANCE_ALPHA;
1769 case GL_SLUMINANCE8_ALPHA8:
1770 return GL_LUMINANCE8_ALPHA8;
1771 default:
1772 return format;
1773 }
1774 }
1775
1776
1777 /**
1778 * Do error checking of format/type combinations for glReadPixels,
1779 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1780 * and type values, we may either generate GL_INVALID_OPERATION or
1781 * GL_INVALID_ENUM.
1782 *
1783 * \param format pixel format.
1784 * \param type pixel type.
1785 *
1786 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1787 */
1788 GLenum
_mesa_error_check_format_and_type(const struct gl_context * ctx,GLenum format,GLenum type)1789 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1790 GLenum format, GLenum type)
1791 {
1792 /* From OpenGL 3.3 spec, page 220:
1793 * "If the format is DEPTH_STENCIL, then values are taken from
1794 * both the depth buffer and the stencil buffer. If there is no
1795 * depth buffer or if there is no stencil buffer, then the error
1796 * INVALID_OPERATION occurs. If the type parameter is not
1797 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1798 * error INVALID_ENUM occurs."
1799 *
1800 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1801 * cannot be used to read depth or stencil in that API.
1802 */
1803 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1804 && type != GL_UNSIGNED_INT_24_8
1805 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1806 return GL_INVALID_ENUM;
1807
1808 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1809 switch (type) {
1810 case GL_BITMAP:
1811 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1812 return GL_INVALID_ENUM;
1813 }
1814 break;
1815
1816 case GL_UNSIGNED_BYTE_3_3_2:
1817 case GL_UNSIGNED_BYTE_2_3_3_REV:
1818 case GL_UNSIGNED_SHORT_5_6_5:
1819 case GL_UNSIGNED_SHORT_5_6_5_REV:
1820 if (format == GL_RGB) {
1821 break; /* OK */
1822 }
1823 if (format == GL_RGB_INTEGER_EXT &&
1824 _mesa_has_texture_rgb10_a2ui(ctx)) {
1825 break; /* OK */
1826 }
1827 return GL_INVALID_OPERATION;
1828
1829 case GL_UNSIGNED_SHORT_4_4_4_4:
1830 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1831 case GL_UNSIGNED_INT_8_8_8_8:
1832 case GL_UNSIGNED_INT_8_8_8_8_REV:
1833 if (format == GL_RGBA ||
1834 format == GL_BGRA ||
1835 format == GL_ABGR_EXT) {
1836 break; /* OK */
1837 }
1838 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1839 _mesa_has_texture_rgb10_a2ui(ctx)) {
1840 break; /* OK */
1841 }
1842 return GL_INVALID_OPERATION;
1843
1844 case GL_UNSIGNED_SHORT_5_5_5_1:
1845 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1846 case GL_UNSIGNED_INT_10_10_10_2:
1847 case GL_UNSIGNED_INT_2_10_10_10_REV:
1848 if (format == GL_RGBA ||
1849 format == GL_BGRA) {
1850 break; /* OK */
1851 }
1852 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1853 _mesa_has_texture_rgb10_a2ui(ctx)) {
1854 break; /* OK */
1855 }
1856 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1857 ctx->API == API_OPENGLES2) {
1858 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1859 }
1860 return GL_INVALID_OPERATION;
1861
1862 case GL_UNSIGNED_INT_24_8:
1863 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1864 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1865 return GL_NO_ERROR;
1866
1867 if (format != GL_DEPTH_STENCIL) {
1868 return GL_INVALID_OPERATION;
1869 }
1870 return GL_NO_ERROR;
1871
1872 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1873 if (!_mesa_has_float_depth_buffer(ctx)) {
1874 return GL_INVALID_ENUM;
1875 }
1876 if (format != GL_DEPTH_STENCIL) {
1877 return GL_INVALID_OPERATION;
1878 }
1879 return GL_NO_ERROR;
1880
1881 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1882 if (!_mesa_has_packed_float(ctx)) {
1883 return GL_INVALID_ENUM;
1884 }
1885 if (format != GL_RGB) {
1886 return GL_INVALID_OPERATION;
1887 }
1888 return GL_NO_ERROR;
1889
1890 case GL_HALF_FLOAT_OES:
1891 switch (format) {
1892 case GL_RGBA:
1893 case GL_RGB:
1894 case GL_LUMINANCE_ALPHA:
1895 case GL_LUMINANCE:
1896 case GL_ALPHA:
1897 return GL_NO_ERROR;
1898 case GL_RG:
1899 case GL_RED:
1900 if (_mesa_has_rg_textures(ctx))
1901 return GL_NO_ERROR;
1902 FALLTHROUGH;
1903 default:
1904 return GL_INVALID_OPERATION;
1905 }
1906
1907 default:
1908 ; /* fall-through */
1909 }
1910
1911 /* now, for each format, check the type for compatibility */
1912 switch (format) {
1913 case GL_COLOR_INDEX:
1914 case GL_STENCIL_INDEX:
1915 switch (type) {
1916 case GL_BITMAP:
1917 case GL_BYTE:
1918 case GL_UNSIGNED_BYTE:
1919 case GL_SHORT:
1920 case GL_UNSIGNED_SHORT:
1921 case GL_INT:
1922 case GL_UNSIGNED_INT:
1923 case GL_FLOAT:
1924 case GL_HALF_FLOAT:
1925 return GL_NO_ERROR;
1926 default:
1927 return GL_INVALID_ENUM;
1928 }
1929
1930 case GL_RED:
1931 case GL_GREEN:
1932 case GL_BLUE:
1933 case GL_ALPHA:
1934 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1935 case GL_INTENSITY:
1936 #endif
1937 case GL_LUMINANCE:
1938 case GL_LUMINANCE_ALPHA:
1939 case GL_DEPTH_COMPONENT:
1940 switch (type) {
1941 case GL_BYTE:
1942 case GL_UNSIGNED_BYTE:
1943 case GL_SHORT:
1944 case GL_UNSIGNED_SHORT:
1945 case GL_INT:
1946 case GL_UNSIGNED_INT:
1947 case GL_FLOAT:
1948 case GL_HALF_FLOAT:
1949 return GL_NO_ERROR;
1950 default:
1951 return GL_INVALID_ENUM;
1952 }
1953
1954 case GL_RG:
1955 if (!_mesa_has_rg_textures(ctx))
1956 return GL_INVALID_ENUM;
1957 switch (type) {
1958 case GL_BYTE:
1959 case GL_UNSIGNED_BYTE:
1960 case GL_SHORT:
1961 case GL_UNSIGNED_SHORT:
1962 case GL_INT:
1963 case GL_UNSIGNED_INT:
1964 case GL_FLOAT:
1965 case GL_HALF_FLOAT:
1966 return GL_NO_ERROR;
1967 default:
1968 return GL_INVALID_ENUM;
1969 }
1970
1971 case GL_RGB:
1972 switch (type) {
1973 case GL_BYTE:
1974 case GL_UNSIGNED_BYTE:
1975 case GL_SHORT:
1976 case GL_UNSIGNED_SHORT:
1977 case GL_INT:
1978 case GL_UNSIGNED_INT:
1979 case GL_FLOAT:
1980 case GL_UNSIGNED_BYTE_3_3_2:
1981 case GL_UNSIGNED_BYTE_2_3_3_REV:
1982 case GL_UNSIGNED_SHORT_5_6_5:
1983 case GL_UNSIGNED_SHORT_5_6_5_REV:
1984 case GL_HALF_FLOAT:
1985 return GL_NO_ERROR;
1986 case GL_UNSIGNED_INT_2_10_10_10_REV:
1987 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1988 return (ctx->API == API_OPENGLES2)
1989 ? GL_NO_ERROR : GL_INVALID_ENUM;
1990 case GL_UNSIGNED_INT_5_9_9_9_REV:
1991 return _mesa_has_texture_shared_exponent(ctx)
1992 ? GL_NO_ERROR : GL_INVALID_ENUM;
1993 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1994 return _mesa_has_packed_float(ctx)
1995 ? GL_NO_ERROR : GL_INVALID_ENUM;
1996 default:
1997 return GL_INVALID_ENUM;
1998 }
1999
2000 case GL_BGR:
2001 switch (type) {
2002 /* NOTE: no packed types are supported with BGR. That's
2003 * intentional, according to the GL spec.
2004 */
2005 case GL_BYTE:
2006 case GL_UNSIGNED_BYTE:
2007 case GL_SHORT:
2008 case GL_UNSIGNED_SHORT:
2009 case GL_INT:
2010 case GL_UNSIGNED_INT:
2011 case GL_FLOAT:
2012 case GL_HALF_FLOAT:
2013 return GL_NO_ERROR;
2014 default:
2015 return GL_INVALID_ENUM;
2016 }
2017
2018 case GL_RGBA:
2019 case GL_BGRA:
2020 switch (type) {
2021 case GL_BYTE:
2022 case GL_UNSIGNED_BYTE:
2023 case GL_SHORT:
2024 case GL_UNSIGNED_SHORT:
2025 case GL_INT:
2026 case GL_UNSIGNED_INT:
2027 case GL_FLOAT:
2028 case GL_UNSIGNED_SHORT_4_4_4_4:
2029 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2030 case GL_UNSIGNED_SHORT_5_5_5_1:
2031 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2032 case GL_UNSIGNED_INT_8_8_8_8:
2033 case GL_UNSIGNED_INT_8_8_8_8_REV:
2034 case GL_UNSIGNED_INT_10_10_10_2:
2035 case GL_UNSIGNED_INT_2_10_10_10_REV:
2036 case GL_HALF_FLOAT:
2037 return GL_NO_ERROR;
2038 default:
2039 return GL_INVALID_ENUM;
2040 }
2041
2042 case GL_ABGR_EXT:
2043 switch (type) {
2044 case GL_BYTE:
2045 case GL_UNSIGNED_BYTE:
2046 case GL_SHORT:
2047 case GL_UNSIGNED_SHORT:
2048 case GL_INT:
2049 case GL_UNSIGNED_INT:
2050 case GL_FLOAT:
2051 case GL_UNSIGNED_SHORT_4_4_4_4:
2052 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2053 case GL_UNSIGNED_INT_8_8_8_8:
2054 case GL_UNSIGNED_INT_8_8_8_8_REV:
2055 case GL_HALF_FLOAT:
2056 return GL_NO_ERROR;
2057 default:
2058 return GL_INVALID_ENUM;
2059 }
2060
2061 case GL_YCBCR_MESA:
2062 if (!_mesa_has_MESA_ycbcr_texture(ctx))
2063 return GL_INVALID_ENUM;
2064 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2065 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2066 return GL_NO_ERROR;
2067 else
2068 return GL_INVALID_OPERATION;
2069
2070 case GL_DEPTH_STENCIL:
2071 if (type == GL_UNSIGNED_INT_24_8)
2072 return GL_NO_ERROR;
2073 else if (_mesa_has_float_depth_buffer(ctx) &&
2074 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2075 return GL_NO_ERROR;
2076 else
2077 return GL_INVALID_ENUM;
2078
2079 /* integer-valued formats */
2080 case GL_RED_INTEGER_EXT:
2081 case GL_GREEN_INTEGER_EXT:
2082 case GL_BLUE_INTEGER_EXT:
2083 case GL_ALPHA_INTEGER_EXT:
2084 case GL_RG_INTEGER:
2085 switch (type) {
2086 case GL_BYTE:
2087 case GL_UNSIGNED_BYTE:
2088 case GL_SHORT:
2089 case GL_UNSIGNED_SHORT:
2090 case GL_INT:
2091 case GL_UNSIGNED_INT:
2092 return _mesa_has_integer_textures(ctx)
2093 ? GL_NO_ERROR : GL_INVALID_ENUM;
2094 default:
2095 return GL_INVALID_ENUM;
2096 }
2097
2098 case GL_RGB_INTEGER_EXT:
2099 switch (type) {
2100 case GL_BYTE:
2101 case GL_UNSIGNED_BYTE:
2102 case GL_SHORT:
2103 case GL_UNSIGNED_SHORT:
2104 case GL_INT:
2105 case GL_UNSIGNED_INT:
2106 return _mesa_has_integer_textures(ctx)
2107 ? GL_NO_ERROR : GL_INVALID_ENUM;
2108 case GL_UNSIGNED_BYTE_3_3_2:
2109 case GL_UNSIGNED_BYTE_2_3_3_REV:
2110 case GL_UNSIGNED_SHORT_5_6_5:
2111 case GL_UNSIGNED_SHORT_5_6_5_REV:
2112 return _mesa_has_texture_rgb10_a2ui(ctx)
2113 ? GL_NO_ERROR : GL_INVALID_ENUM;
2114 default:
2115 return GL_INVALID_ENUM;
2116 }
2117
2118 case GL_BGR_INTEGER_EXT:
2119 switch (type) {
2120 case GL_BYTE:
2121 case GL_UNSIGNED_BYTE:
2122 case GL_SHORT:
2123 case GL_UNSIGNED_SHORT:
2124 case GL_INT:
2125 case GL_UNSIGNED_INT:
2126 /* NOTE: no packed formats w/ BGR format */
2127 return _mesa_has_integer_textures(ctx)
2128 ? GL_NO_ERROR : GL_INVALID_ENUM;
2129 default:
2130 return GL_INVALID_ENUM;
2131 }
2132
2133 case GL_RGBA_INTEGER_EXT:
2134 case GL_BGRA_INTEGER_EXT:
2135 switch (type) {
2136 case GL_BYTE:
2137 case GL_UNSIGNED_BYTE:
2138 case GL_SHORT:
2139 case GL_UNSIGNED_SHORT:
2140 case GL_INT:
2141 case GL_UNSIGNED_INT:
2142 return _mesa_has_integer_textures(ctx)
2143 ? GL_NO_ERROR : GL_INVALID_ENUM;
2144 case GL_UNSIGNED_SHORT_4_4_4_4:
2145 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2146 case GL_UNSIGNED_SHORT_5_5_5_1:
2147 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2148 case GL_UNSIGNED_INT_8_8_8_8:
2149 case GL_UNSIGNED_INT_8_8_8_8_REV:
2150 case GL_UNSIGNED_INT_10_10_10_2:
2151 case GL_UNSIGNED_INT_2_10_10_10_REV:
2152 return _mesa_has_texture_rgb10_a2ui(ctx)
2153 ? GL_NO_ERROR : GL_INVALID_ENUM;
2154 default:
2155 return GL_INVALID_ENUM;
2156 }
2157
2158 case GL_LUMINANCE_INTEGER_EXT:
2159 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2160 switch (type) {
2161 case GL_BYTE:
2162 case GL_UNSIGNED_BYTE:
2163 case GL_SHORT:
2164 case GL_UNSIGNED_SHORT:
2165 case GL_INT:
2166 case GL_UNSIGNED_INT:
2167 return _mesa_has_integer_textures(ctx)
2168 ? GL_NO_ERROR : GL_INVALID_ENUM;
2169 default:
2170 return GL_INVALID_ENUM;
2171 }
2172
2173 default:
2174 return GL_INVALID_ENUM;
2175 }
2176 return GL_NO_ERROR;
2177 }
2178
2179
2180 /**
2181 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2182 * and glTex[Sub]Image.
2183 * \return error code, or GL_NO_ERROR.
2184 */
2185 GLenum
_mesa_es_error_check_format_and_type(const struct gl_context * ctx,GLenum format,GLenum type,unsigned dimensions)2186 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2187 GLenum format, GLenum type,
2188 unsigned dimensions)
2189 {
2190 GLboolean type_valid = GL_TRUE;
2191
2192 switch (format) {
2193 case GL_RED:
2194 case GL_RG:
2195 if (!_mesa_has_rg_textures(ctx))
2196 return GL_INVALID_VALUE;
2197 FALLTHROUGH;
2198 case GL_ALPHA:
2199 case GL_LUMINANCE:
2200 case GL_LUMINANCE_ALPHA:
2201 type_valid = (type == GL_UNSIGNED_BYTE
2202 || type == GL_FLOAT
2203 || type == GL_HALF_FLOAT_OES);
2204 break;
2205
2206 case GL_RGB:
2207 type_valid = (type == GL_UNSIGNED_BYTE
2208 || type == GL_UNSIGNED_SHORT_5_6_5
2209 || type == GL_FLOAT
2210 || type == GL_HALF_FLOAT_OES);
2211 break;
2212
2213 case GL_RGBA:
2214 type_valid = (type == GL_UNSIGNED_BYTE
2215 || type == GL_UNSIGNED_SHORT_4_4_4_4
2216 || type == GL_UNSIGNED_SHORT_5_5_5_1
2217 || type == GL_FLOAT
2218 || type == GL_HALF_FLOAT_OES
2219 || (_mesa_has_texture_type_2_10_10_10_REV(ctx) &&
2220 type == GL_UNSIGNED_INT_2_10_10_10_REV));
2221 break;
2222
2223 case GL_DEPTH_COMPONENT:
2224 /* This format is filtered against invalid dimensionalities elsewhere.
2225 */
2226 type_valid = (type == GL_UNSIGNED_SHORT
2227 || type == GL_UNSIGNED_INT);
2228 break;
2229
2230 case GL_DEPTH_STENCIL:
2231 /* This format is filtered against invalid dimensionalities elsewhere.
2232 */
2233 type_valid = (type == GL_UNSIGNED_INT_24_8);
2234 break;
2235
2236 case GL_BGRA_EXT:
2237 type_valid = (type == GL_UNSIGNED_BYTE);
2238
2239 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2240 * the format does not appear to be allowed for 3D textures in OpenGL
2241 * ES.
2242 */
2243 if (dimensions != 2)
2244 return GL_INVALID_VALUE;
2245
2246 break;
2247
2248 default:
2249 return GL_INVALID_VALUE;
2250 }
2251
2252 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2253 }
2254
2255 /**
2256 * Return the simple base format for a given internal texture format.
2257 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2258 *
2259 * \param ctx GL context.
2260 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2261 *
2262 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2263 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2264 *
2265 * This is the format which is used during texture application (i.e. the
2266 * texture format and env mode determine the arithmetic used.
2267 */
2268 GLint
_mesa_base_tex_format(const struct gl_context * ctx,GLint internalFormat)2269 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2270 {
2271 switch (internalFormat) {
2272 case GL_ALPHA:
2273 case GL_ALPHA4:
2274 case GL_ALPHA8:
2275 case GL_ALPHA12:
2276 case GL_ALPHA16:
2277 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2278 case 1:
2279 case GL_LUMINANCE:
2280 case GL_LUMINANCE4:
2281 case GL_LUMINANCE8:
2282 case GL_LUMINANCE12:
2283 case GL_LUMINANCE16:
2284 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2285 case 2:
2286 case GL_LUMINANCE_ALPHA:
2287 case GL_LUMINANCE4_ALPHA4:
2288 case GL_LUMINANCE6_ALPHA2:
2289 case GL_LUMINANCE8_ALPHA8:
2290 case GL_LUMINANCE12_ALPHA4:
2291 case GL_LUMINANCE12_ALPHA12:
2292 case GL_LUMINANCE16_ALPHA16:
2293 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2294 case GL_INTENSITY:
2295 case GL_INTENSITY4:
2296 case GL_INTENSITY8:
2297 case GL_INTENSITY12:
2298 case GL_INTENSITY16:
2299 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2300 case 3:
2301 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2302 case GL_RGB:
2303 case GL_R3_G3_B2:
2304 case GL_RGB4:
2305 case GL_RGB5:
2306 case GL_RGB8:
2307 case GL_RGB10:
2308 case GL_RGB12:
2309 case GL_RGB16:
2310 return GL_RGB;
2311 case 4:
2312 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2313 case GL_RGBA:
2314 case GL_RGBA2:
2315 case GL_RGBA4:
2316 case GL_RGB5_A1:
2317 case GL_RGBA8:
2318 case GL_RGB10_A2:
2319 case GL_RGBA12:
2320 case GL_RGBA16:
2321 return GL_RGBA;
2322 default:
2323 ; /* fallthrough */
2324 }
2325
2326 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2327 */
2328 if (_mesa_is_gles(ctx)) {
2329 switch (internalFormat) {
2330 case GL_BGRA:
2331 return GL_RGBA;
2332 default:
2333 ; /* fallthrough */
2334 }
2335 }
2336
2337 if (_mesa_has_ARB_ES2_compatibility(ctx) ||
2338 _mesa_has_OES_framebuffer_object(ctx) ||
2339 ctx->API == API_OPENGLES2) {
2340 switch (internalFormat) {
2341 case GL_RGB565:
2342 return GL_RGB;
2343 default:
2344 ; /* fallthrough */
2345 }
2346 }
2347
2348 if (ctx->API != API_OPENGLES) {
2349 switch (internalFormat) {
2350 case GL_DEPTH_COMPONENT:
2351 case GL_DEPTH_COMPONENT16:
2352 case GL_DEPTH_COMPONENT24:
2353 case GL_DEPTH_COMPONENT32:
2354 return GL_DEPTH_COMPONENT;
2355 case GL_DEPTH_STENCIL:
2356 case GL_DEPTH24_STENCIL8:
2357 return GL_DEPTH_STENCIL;
2358 default:
2359 ; /* fallthrough */
2360 }
2361 }
2362
2363 if (_mesa_has_ARB_texture_stencil8(ctx) ||
2364 _mesa_has_OES_texture_stencil8(ctx)) {
2365 switch (internalFormat) {
2366 case GL_STENCIL_INDEX:
2367 case GL_STENCIL_INDEX1:
2368 case GL_STENCIL_INDEX4:
2369 case GL_STENCIL_INDEX8:
2370 case GL_STENCIL_INDEX16:
2371 return GL_STENCIL_INDEX;
2372 default:
2373 ; /* fallthrough */
2374 }
2375 }
2376
2377 switch (internalFormat) {
2378 case GL_COMPRESSED_ALPHA:
2379 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2380 case GL_COMPRESSED_LUMINANCE:
2381 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2382 case GL_COMPRESSED_LUMINANCE_ALPHA:
2383 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2384 case GL_COMPRESSED_INTENSITY:
2385 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2386 case GL_COMPRESSED_RGB:
2387 return GL_RGB;
2388 case GL_COMPRESSED_RGBA:
2389 return GL_RGBA;
2390 default:
2391 ; /* fallthrough */
2392 }
2393
2394 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2395 GLenum base_compressed =
2396 _mesa_gl_compressed_format_base_format(internalFormat);
2397 if (base_compressed)
2398 return base_compressed;
2399 }
2400
2401 if ((_mesa_has_KHR_texture_compression_astc_ldr(ctx) &&
2402 is_astc_2d_format(internalFormat)) ||
2403 (_mesa_has_OES_texture_compression_astc(ctx) &&
2404 is_astc_3d_format(internalFormat)))
2405 return GL_RGBA;
2406
2407 if (_mesa_has_MESA_ycbcr_texture(ctx)) {
2408 if (internalFormat == GL_YCBCR_MESA)
2409 return GL_YCBCR_MESA;
2410 }
2411
2412 if (_mesa_has_half_float_textures(ctx)) {
2413 switch (internalFormat) {
2414 case GL_ALPHA16F_ARB:
2415 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2416 case GL_RGBA16F_ARB:
2417 return GL_RGBA;
2418 case GL_RGB16F_ARB:
2419 return GL_RGB;
2420 case GL_INTENSITY16F_ARB:
2421 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2422 case GL_LUMINANCE16F_ARB:
2423 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2424 case GL_LUMINANCE_ALPHA16F_ARB:
2425 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2426 }
2427 }
2428
2429 if (_mesa_has_float_textures(ctx)) {
2430 switch (internalFormat) {
2431 case GL_ALPHA32F_ARB:
2432 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2433 case GL_RGBA32F_ARB:
2434 return GL_RGBA;
2435 case GL_RGB32F_ARB:
2436 return GL_RGB;
2437 case GL_INTENSITY32F_ARB:
2438 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2439 case GL_LUMINANCE32F_ARB:
2440 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2441 case GL_LUMINANCE_ALPHA32F_ARB:
2442 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2443 }
2444 }
2445
2446 if (_mesa_has_EXT_texture_snorm(ctx) || _mesa_is_gles3(ctx)) {
2447 switch (internalFormat) {
2448 case GL_RED_SNORM:
2449 case GL_R8_SNORM:
2450 case GL_R16_SNORM:
2451 return GL_RED;
2452 case GL_RG_SNORM:
2453 case GL_RG8_SNORM:
2454 case GL_RG16_SNORM:
2455 return GL_RG;
2456 case GL_RGB_SNORM:
2457 case GL_RGB8_SNORM:
2458 case GL_RGB16_SNORM:
2459 return GL_RGB;
2460 case GL_RGBA_SNORM:
2461 case GL_RGBA8_SNORM:
2462 case GL_RGBA16_SNORM:
2463 return GL_RGBA;
2464 case GL_ALPHA_SNORM:
2465 case GL_ALPHA8_SNORM:
2466 case GL_ALPHA16_SNORM:
2467 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2468 case GL_LUMINANCE_SNORM:
2469 case GL_LUMINANCE8_SNORM:
2470 case GL_LUMINANCE16_SNORM:
2471 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2472 case GL_LUMINANCE_ALPHA_SNORM:
2473 case GL_LUMINANCE8_ALPHA8_SNORM:
2474 case GL_LUMINANCE16_ALPHA16_SNORM:
2475 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2476 case GL_INTENSITY_SNORM:
2477 case GL_INTENSITY8_SNORM:
2478 case GL_INTENSITY16_SNORM:
2479 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2480 default:
2481 ; /* fallthrough */
2482 }
2483 }
2484
2485 if (_mesa_has_EXT_texture_sRGB(ctx) || _mesa_is_gles3(ctx)) {
2486 switch (internalFormat) {
2487 case GL_SRGB_EXT:
2488 case GL_SRGB8_EXT:
2489 case GL_COMPRESSED_SRGB_EXT:
2490 return GL_RGB;
2491 case GL_SRGB_ALPHA_EXT:
2492 case GL_SRGB8_ALPHA8_EXT:
2493 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2494 return GL_RGBA;
2495 case GL_SLUMINANCE_ALPHA_EXT:
2496 case GL_SLUMINANCE8_ALPHA8_EXT:
2497 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2498 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2499 case GL_SLUMINANCE_EXT:
2500 case GL_SLUMINANCE8_EXT:
2501 case GL_COMPRESSED_SLUMINANCE_EXT:
2502 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2503 default:
2504 ; /* fallthrough */
2505 }
2506 }
2507
2508 if (_mesa_has_EXT_texture_sRGB_R8(ctx)) {
2509 switch (internalFormat) {
2510 case GL_SR8_EXT:
2511 return GL_RED;
2512 default:
2513 ; /* fallthrough */
2514 }
2515 }
2516
2517 if (_mesa_has_EXT_texture_sRGB_RG8(ctx)) {
2518 switch (internalFormat) {
2519 case GL_SRG8_EXT:
2520 return GL_RG;
2521 default:
2522 ; /* fallthrough */
2523 }
2524 }
2525
2526 if (_mesa_has_integer_textures(ctx)) {
2527 switch (internalFormat) {
2528 case GL_RGBA8UI_EXT:
2529 case GL_RGBA16UI_EXT:
2530 case GL_RGBA32UI_EXT:
2531 case GL_RGBA8I_EXT:
2532 case GL_RGBA16I_EXT:
2533 case GL_RGBA32I_EXT:
2534 return GL_RGBA;
2535 case GL_RGB8UI_EXT:
2536 case GL_RGB16UI_EXT:
2537 case GL_RGB32UI_EXT:
2538 case GL_RGB8I_EXT:
2539 case GL_RGB16I_EXT:
2540 case GL_RGB32I_EXT:
2541 return GL_RGB;
2542 }
2543 }
2544
2545 if (_mesa_has_texture_rgb10_a2ui(ctx)) {
2546 switch (internalFormat) {
2547 case GL_RGB10_A2UI:
2548 return GL_RGBA;
2549 }
2550 }
2551
2552 if (_mesa_has_integer_textures(ctx)) {
2553 switch (internalFormat) {
2554 case GL_ALPHA8UI_EXT:
2555 case GL_ALPHA16UI_EXT:
2556 case GL_ALPHA32UI_EXT:
2557 case GL_ALPHA8I_EXT:
2558 case GL_ALPHA16I_EXT:
2559 case GL_ALPHA32I_EXT:
2560 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2561 case GL_INTENSITY8UI_EXT:
2562 case GL_INTENSITY16UI_EXT:
2563 case GL_INTENSITY32UI_EXT:
2564 case GL_INTENSITY8I_EXT:
2565 case GL_INTENSITY16I_EXT:
2566 case GL_INTENSITY32I_EXT:
2567 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2568 case GL_LUMINANCE8UI_EXT:
2569 case GL_LUMINANCE16UI_EXT:
2570 case GL_LUMINANCE32UI_EXT:
2571 case GL_LUMINANCE8I_EXT:
2572 case GL_LUMINANCE16I_EXT:
2573 case GL_LUMINANCE32I_EXT:
2574 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2575 case GL_LUMINANCE_ALPHA8UI_EXT:
2576 case GL_LUMINANCE_ALPHA16UI_EXT:
2577 case GL_LUMINANCE_ALPHA32UI_EXT:
2578 case GL_LUMINANCE_ALPHA8I_EXT:
2579 case GL_LUMINANCE_ALPHA16I_EXT:
2580 case GL_LUMINANCE_ALPHA32I_EXT:
2581 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2582 default:
2583 ; /* fallthrough */
2584 }
2585 }
2586
2587 if (_mesa_has_rg_textures(ctx)) {
2588 switch (internalFormat) {
2589 case GL_R16F:
2590 if (!_mesa_has_half_float_textures(ctx))
2591 break;
2592 return GL_RED;
2593 case GL_R32F:
2594 if (!_mesa_has_float_textures(ctx))
2595 break;
2596 return GL_RED;
2597 case GL_R8I:
2598 case GL_R8UI:
2599 case GL_R16I:
2600 case GL_R16UI:
2601 case GL_R32I:
2602 case GL_R32UI:
2603 if (!_mesa_has_integer_textures(ctx))
2604 break;
2605 FALLTHROUGH;
2606 case GL_R8:
2607 case GL_R16:
2608 case GL_RED:
2609 case GL_COMPRESSED_RED:
2610 return GL_RED;
2611
2612 case GL_RG16F:
2613 if (!_mesa_has_half_float_textures(ctx))
2614 break;
2615 return GL_RG;
2616 case GL_RG32F:
2617 if (!_mesa_has_float_textures(ctx))
2618 break;
2619 return GL_RG;
2620 case GL_RG8I:
2621 case GL_RG8UI:
2622 case GL_RG16I:
2623 case GL_RG16UI:
2624 case GL_RG32I:
2625 case GL_RG32UI:
2626 if (!_mesa_has_integer_textures(ctx))
2627 break;
2628 FALLTHROUGH;
2629 case GL_RG:
2630 case GL_RG8:
2631 case GL_RG16:
2632 case GL_COMPRESSED_RG:
2633 return GL_RG;
2634 default:
2635 ; /* fallthrough */
2636 }
2637 }
2638
2639 if (_mesa_has_texture_shared_exponent(ctx)) {
2640 switch (internalFormat) {
2641 case GL_RGB9_E5_EXT:
2642 return GL_RGB;
2643 default:
2644 ; /* fallthrough */
2645 }
2646 }
2647
2648 if (_mesa_has_packed_float(ctx)) {
2649 switch (internalFormat) {
2650 case GL_R11F_G11F_B10F_EXT:
2651 return GL_RGB;
2652 default:
2653 ; /* fallthrough */
2654 }
2655 }
2656
2657 if (_mesa_has_float_depth_buffer(ctx)) {
2658 switch (internalFormat) {
2659 case GL_DEPTH_COMPONENT32F:
2660 return GL_DEPTH_COMPONENT;
2661 case GL_DEPTH32F_STENCIL8:
2662 return GL_DEPTH_STENCIL;
2663 default:
2664 ; /* fallthrough */
2665 }
2666 }
2667
2668 return -1; /* error */
2669 }
2670
2671 /**
2672 * Returns the effective internal format from a texture format and type.
2673 * This is used by texture image operations internally for validation, when
2674 * the specified internal format is a base (unsized) format.
2675 *
2676 * This method will only return a valid effective internal format if the
2677 * combination of format, type and internal format in base form, is acceptable.
2678 *
2679 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2680 * in extensions, to unambiguously correspond to the given base format, then
2681 * that internal format is returned as the effective. Otherwise, if the
2682 * combination is accepted but a single effective format is not defined, the
2683 * passed base format will be returned instead.
2684 *
2685 * \param format the texture format
2686 * \param type the texture type
2687 */
2688 static GLenum
gles_effective_internal_format_for_format_and_type(GLenum format,GLenum type)2689 gles_effective_internal_format_for_format_and_type(GLenum format,
2690 GLenum type)
2691 {
2692 switch (type) {
2693 case GL_UNSIGNED_BYTE:
2694 switch (format) {
2695 case GL_RGBA:
2696 return GL_RGBA8;
2697 case GL_RGB:
2698 return GL_RGB8;
2699 case GL_RG:
2700 return GL_RG8;
2701 case GL_RED:
2702 return GL_R8;
2703 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2704 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2705 * internal formats, they do not correspond to GL constants, so the base
2706 * format is returned instead.
2707 */
2708 case GL_BGRA_EXT:
2709 case GL_LUMINANCE_ALPHA:
2710 case GL_LUMINANCE:
2711 case GL_ALPHA:
2712 return format;
2713 }
2714 break;
2715
2716 case GL_UNSIGNED_SHORT_4_4_4_4:
2717 if (format == GL_RGBA)
2718 return GL_RGBA4;
2719 break;
2720
2721 case GL_UNSIGNED_SHORT_5_5_5_1:
2722 if (format == GL_RGBA)
2723 return GL_RGB5_A1;
2724 break;
2725
2726 case GL_UNSIGNED_SHORT_5_6_5:
2727 if (format == GL_RGB)
2728 return GL_RGB565;
2729 break;
2730
2731 /* OES_packed_depth_stencil */
2732 case GL_UNSIGNED_INT_24_8:
2733 if (format == GL_DEPTH_STENCIL)
2734 return GL_DEPTH24_STENCIL8;
2735 break;
2736
2737 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2738 if (format == GL_DEPTH_STENCIL)
2739 return GL_DEPTH32F_STENCIL8;
2740 break;
2741
2742 case GL_UNSIGNED_SHORT:
2743 if (format == GL_DEPTH_COMPONENT)
2744 return GL_DEPTH_COMPONENT16;
2745 break;
2746
2747 case GL_UNSIGNED_INT:
2748 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2749 * the format.
2750 */
2751 if (format == GL_DEPTH_COMPONENT)
2752 return format;
2753 break;
2754
2755 /* OES_texture_float and OES_texture_half_float */
2756 case GL_FLOAT:
2757 if (format == GL_DEPTH_COMPONENT)
2758 return GL_DEPTH_COMPONENT32F;
2759 FALLTHROUGH;
2760 case GL_HALF_FLOAT_OES:
2761 switch (format) {
2762 case GL_RGBA:
2763 case GL_RGB:
2764 case GL_LUMINANCE_ALPHA:
2765 case GL_LUMINANCE:
2766 case GL_ALPHA:
2767 case GL_RED:
2768 case GL_RG:
2769 return format;
2770 }
2771 break;
2772 case GL_HALF_FLOAT:
2773 switch (format) {
2774 case GL_RG:
2775 case GL_RED:
2776 return format;
2777 }
2778 break;
2779
2780 /* GL_EXT_texture_type_2_10_10_10_REV */
2781 case GL_UNSIGNED_INT_2_10_10_10_REV:
2782 switch (format) {
2783 case GL_RGBA:
2784 case GL_RGB:
2785 return format;
2786 }
2787 break;
2788
2789 default:
2790 /* fall through and return NONE */
2791 break;
2792 }
2793
2794 return GL_NONE;
2795 }
2796
2797 /**
2798 * Error checking if internalformat for glTex[Sub]Image is valid
2799 * within OpenGL ES 3.2 (or introduced by an ES extension).
2800 *
2801 * Note, further checks in _mesa_gles_error_check_format_and_type
2802 * are required for complete checking between format and type.
2803 */
2804 static GLenum
_mesa_gles_check_internalformat(const struct gl_context * ctx,GLenum internalFormat)2805 _mesa_gles_check_internalformat(const struct gl_context *ctx,
2806 GLenum internalFormat)
2807 {
2808 switch (internalFormat) {
2809 /* OpenGL ES 2.0 */
2810 case GL_ALPHA:
2811 case GL_LUMINANCE:
2812 case GL_LUMINANCE_ALPHA:
2813 case GL_RGB:
2814 case GL_RGBA:
2815
2816 /* GL_OES_depth_texture */
2817 case GL_DEPTH_COMPONENT:
2818
2819 /* GL_EXT_texture_format_BGRA8888 */
2820 case GL_BGRA:
2821
2822 /* GL_OES_required_internalformat */
2823 case GL_RGB565:
2824 case GL_RGB8:
2825 case GL_RGBA4:
2826 case GL_RGB5_A1:
2827 case GL_RGBA8:
2828 case GL_DEPTH_COMPONENT16:
2829 case GL_DEPTH_COMPONENT24:
2830 case GL_DEPTH_COMPONENT32:
2831 case GL_DEPTH24_STENCIL8:
2832 case GL_RGB10_EXT:
2833 case GL_RGB10_A2_EXT:
2834 case GL_ALPHA8:
2835 case GL_LUMINANCE8:
2836 case GL_LUMINANCE8_ALPHA8:
2837 case GL_LUMINANCE4_ALPHA4:
2838 return GL_NO_ERROR;
2839
2840 case GL_R8:
2841 case GL_RG8:
2842 case GL_RED:
2843 case GL_RG:
2844 if (!_mesa_has_rg_textures(ctx))
2845 return GL_INVALID_VALUE;
2846 return GL_NO_ERROR;
2847
2848 /* GL_OES_texture_stencil8 */
2849 case GL_STENCIL_INDEX8:
2850 if (!_mesa_has_OES_texture_stencil8(ctx))
2851 return GL_INVALID_VALUE;
2852 return GL_NO_ERROR;
2853
2854 case GL_COMPRESSED_RGBA_BPTC_UNORM:
2855 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
2856 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
2857 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
2858 if (!_mesa_has_EXT_texture_compression_bptc(ctx))
2859 return GL_INVALID_VALUE;
2860 return GL_NO_ERROR;
2861
2862 case GL_COMPRESSED_RED_RGTC1:
2863 case GL_COMPRESSED_SIGNED_RED_RGTC1:
2864 case GL_COMPRESSED_RED_GREEN_RGTC2_EXT:
2865 case GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT:
2866 if (!_mesa_has_EXT_texture_compression_rgtc(ctx))
2867 return GL_INVALID_VALUE;
2868 return GL_NO_ERROR;
2869
2870 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
2871 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
2872 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
2873 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
2874 if (!_mesa_has_EXT_texture_compression_s3tc(ctx))
2875 return GL_INVALID_VALUE;
2876 return GL_NO_ERROR;
2877
2878 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
2879 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
2880 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
2881 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
2882 if (!_mesa_has_EXT_texture_compression_s3tc_srgb(ctx))
2883 return GL_INVALID_VALUE;
2884 return GL_NO_ERROR;
2885
2886 case GL_R16:
2887 case GL_RG16:
2888 case GL_RGB16:
2889 case GL_RGBA16:
2890 if (!_mesa_has_EXT_texture_norm16(ctx))
2891 return GL_INVALID_VALUE;
2892 return GL_NO_ERROR;
2893
2894 case GL_R16_SNORM:
2895 case GL_RG16_SNORM:
2896 case GL_RGB16_SNORM:
2897 case GL_RGBA16_SNORM:
2898 if (!_mesa_has_EXT_texture_norm16(ctx) &&
2899 !_mesa_has_EXT_texture_snorm(ctx))
2900 return GL_INVALID_VALUE;
2901 return GL_NO_ERROR;
2902
2903 case GL_SR8_EXT:
2904 if (!_mesa_has_EXT_texture_sRGB_R8(ctx))
2905 return GL_INVALID_VALUE;
2906 return GL_NO_ERROR;
2907
2908 case GL_SRG8_EXT:
2909 if (!_mesa_has_EXT_texture_sRGB_RG8(ctx))
2910 return GL_INVALID_VALUE;
2911 return GL_NO_ERROR;
2912
2913 /* OpenGL ES 3.0 */
2914 case GL_SRGB8_ALPHA8:
2915 case GL_RGBA8_SNORM:
2916 case GL_RGBA16F:
2917 case GL_RGBA32F:
2918 case GL_RGBA8UI:
2919 case GL_RGBA8I:
2920 case GL_RGBA16UI:
2921 case GL_RGBA16I:
2922 case GL_RGBA32UI:
2923 case GL_RGBA32I:
2924 case GL_RGB10_A2UI:
2925 case GL_SRGB8:
2926 case GL_RGB8_SNORM:
2927 case GL_R11F_G11F_B10F:
2928 case GL_RGB9_E5:
2929 case GL_RGB16F:
2930 case GL_RGB32F:
2931 case GL_RGB8UI:
2932 case GL_RGB8I:
2933 case GL_RGB16UI:
2934 case GL_RGB16I:
2935 case GL_RGB32UI:
2936 case GL_RGB32I:
2937 case GL_RG8_SNORM:
2938 case GL_RG16F:
2939 case GL_RG32F:
2940 case GL_RG8UI:
2941 case GL_RG8I:
2942 case GL_RG16UI:
2943 case GL_RG16I:
2944 case GL_RG32UI:
2945 case GL_RG32I:
2946 case GL_R8_SNORM:
2947 case GL_R16F:
2948 case GL_R32F:
2949 case GL_R8UI:
2950 case GL_R8I:
2951 case GL_R16UI:
2952 case GL_R16I:
2953 case GL_R32UI:
2954 case GL_R32I:
2955 case GL_DEPTH_COMPONENT32F:
2956 case GL_DEPTH32F_STENCIL8:
2957 if (!_mesa_is_gles3(ctx))
2958 return GL_INVALID_VALUE;
2959 return GL_NO_ERROR;
2960 default:
2961 return GL_INVALID_VALUE;
2962 }
2963 }
2964
2965 /**
2966 * Do error checking of format/type combinations for OpenGL ES 3
2967 * glTex[Sub]Image, or ES1/ES2 with GL_OES_required_internalformat.
2968 * \return error code, or GL_NO_ERROR.
2969 */
2970 GLenum
_mesa_gles_error_check_format_and_type(const struct gl_context * ctx,GLenum format,GLenum type,GLenum internalFormat)2971 _mesa_gles_error_check_format_and_type(const struct gl_context *ctx,
2972 GLenum format, GLenum type,
2973 GLenum internalFormat)
2974 {
2975 /* If internalFormat is an unsized format, then the effective internal
2976 * format derived from format and type should be used instead. Page 127,
2977 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2978 *
2979 * "if internalformat is a base internal format, the effective
2980 * internal format is a sized internal format that is derived
2981 * from the format and type for internal use by the GL.
2982 * Table 3.12 specifies the mapping of format and type to effective
2983 * internal formats. The effective internal format is used by the GL
2984 * for purposes such as texture completeness or type checks for
2985 * CopyTex* commands. In these cases, the GL is required to operate
2986 * as if the effective internal format was used as the internalformat
2987 * when specifying the texture data."
2988 */
2989 if (_mesa_is_enum_format_unsized(internalFormat)) {
2990 GLenum effectiveInternalFormat =
2991 gles_effective_internal_format_for_format_and_type(format, type);
2992
2993 if (effectiveInternalFormat == GL_NONE)
2994 return GL_INVALID_OPERATION;
2995
2996 GLenum baseInternalFormat;
2997 if (internalFormat == GL_BGRA_EXT) {
2998 /* Unfortunately, _mesa_base_tex_format returns a base format of
2999 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
3000 * asking the question, "what channels does this format have?"
3001 * However, if we're trying to determine if two internal formats
3002 * match in the ES3 sense, we actually want GL_BGRA.
3003 */
3004 baseInternalFormat = GL_BGRA_EXT;
3005 } else {
3006 baseInternalFormat =
3007 _mesa_base_tex_format(ctx, effectiveInternalFormat);
3008 }
3009
3010 if (internalFormat != baseInternalFormat)
3011 return GL_INVALID_OPERATION;
3012
3013 internalFormat = effectiveInternalFormat;
3014 }
3015
3016 /* The GLES variant of EXT_texture_compression_s3tc is very vague and
3017 * doesn't list valid types. Just do exactly what the spec says.
3018 */
3019 if (internalFormat == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||
3020 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ||
3021 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT3_EXT ||
3022 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT5_EXT)
3023 return format == GL_RGB || format == GL_RGBA ? GL_NO_ERROR :
3024 GL_INVALID_OPERATION;
3025
3026 /* Before checking for the combination, verify that
3027 * given internalformat is legal for OpenGL ES.
3028 */
3029 GLenum internal_format_error =
3030 _mesa_gles_check_internalformat(ctx, internalFormat);
3031
3032 if (internal_format_error != GL_NO_ERROR)
3033 return internal_format_error;
3034
3035 switch (format) {
3036 case GL_BGRA_EXT:
3037 if (type != GL_UNSIGNED_BYTE ||
3038 (internalFormat != GL_BGRA &&
3039 internalFormat != GL_RGBA8 &&
3040 internalFormat != GL_SRGB8_ALPHA8))
3041 return GL_INVALID_OPERATION;
3042 break;
3043
3044 case GL_BGR_EXT:
3045 if (type != GL_UNSIGNED_BYTE ||
3046 (internalFormat != GL_RGB8 &&
3047 internalFormat != GL_SRGB8))
3048 return GL_INVALID_OPERATION;
3049 break;
3050
3051 case GL_RGBA:
3052 switch (type) {
3053 case GL_UNSIGNED_BYTE:
3054 switch (internalFormat) {
3055 case GL_RGBA:
3056 case GL_RGBA8:
3057 case GL_RGB5_A1:
3058 case GL_RGBA4:
3059 break;
3060 case GL_SRGB8_ALPHA8_EXT:
3061 if (ctx->Version <= 20)
3062 return GL_INVALID_OPERATION;
3063 break;
3064 case GL_COMPRESSED_RGBA_BPTC_UNORM:
3065 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
3066 break;
3067 default:
3068 return GL_INVALID_OPERATION;
3069 }
3070 break;
3071
3072 case GL_BYTE:
3073 if (ctx->Version <= 20 || internalFormat != GL_RGBA8_SNORM)
3074 return GL_INVALID_OPERATION;
3075 break;
3076
3077 case GL_UNSIGNED_SHORT:
3078 if (internalFormat != GL_RGBA16)
3079 return GL_INVALID_OPERATION;
3080 break;
3081
3082 case GL_SHORT:
3083 if (internalFormat != GL_RGBA16_SNORM)
3084 return GL_INVALID_OPERATION;
3085 break;
3086
3087 case GL_UNSIGNED_SHORT_4_4_4_4:
3088 switch (internalFormat) {
3089 case GL_RGBA:
3090 case GL_RGBA4:
3091 break;
3092 default:
3093 return GL_INVALID_OPERATION;
3094 }
3095 break;
3096
3097 case GL_UNSIGNED_SHORT_5_5_5_1:
3098 switch (internalFormat) {
3099 case GL_RGBA:
3100 case GL_RGB5_A1:
3101 break;
3102 default:
3103 return GL_INVALID_OPERATION;
3104 }
3105 break;
3106
3107 case GL_UNSIGNED_INT_2_10_10_10_REV:
3108 switch (internalFormat) {
3109 case GL_RGBA:
3110 case GL_RGB10_A2:
3111 case GL_RGB5_A1:
3112 if (!_mesa_has_texture_type_2_10_10_10_REV(ctx))
3113 return GL_INVALID_OPERATION;
3114 break;
3115 default:
3116 return GL_INVALID_OPERATION;
3117 }
3118 break;
3119
3120 case GL_HALF_FLOAT:
3121 if (ctx->Version <= 20 || internalFormat != GL_RGBA16F)
3122 return GL_INVALID_OPERATION;
3123 break;
3124
3125 case GL_FLOAT:
3126 switch (internalFormat) {
3127 case GL_RGBA16F:
3128 case GL_RGBA32F:
3129 if (ctx->Version <= 20)
3130 return GL_INVALID_OPERATION;
3131 break;
3132 case GL_RGBA:
3133 if (!_mesa_has_OES_texture_float(ctx) || internalFormat != format)
3134 return GL_INVALID_OPERATION;
3135 break;
3136 default:
3137 return GL_INVALID_OPERATION;
3138 }
3139 break;
3140
3141 case GL_HALF_FLOAT_OES:
3142 if (!_mesa_has_OES_texture_half_float(ctx) || internalFormat != format)
3143 return GL_INVALID_OPERATION;
3144 break;
3145 default:
3146 return GL_INVALID_OPERATION;
3147 }
3148 break;
3149
3150 case GL_RGBA_INTEGER:
3151 if (ctx->Version <= 20)
3152 return GL_INVALID_OPERATION;
3153 switch (type) {
3154 case GL_UNSIGNED_BYTE:
3155 if (internalFormat != GL_RGBA8UI)
3156 return GL_INVALID_OPERATION;
3157 break;
3158
3159 case GL_BYTE:
3160 if (internalFormat != GL_RGBA8I)
3161 return GL_INVALID_OPERATION;
3162 break;
3163
3164 case GL_UNSIGNED_SHORT:
3165 if (internalFormat != GL_RGBA16UI)
3166 return GL_INVALID_OPERATION;
3167 break;
3168
3169 case GL_SHORT:
3170 if (internalFormat != GL_RGBA16I)
3171 return GL_INVALID_OPERATION;
3172 break;
3173
3174 case GL_UNSIGNED_INT:
3175 if (internalFormat != GL_RGBA32UI)
3176 return GL_INVALID_OPERATION;
3177 break;
3178
3179 case GL_INT:
3180 if (internalFormat != GL_RGBA32I)
3181 return GL_INVALID_OPERATION;
3182 break;
3183
3184 case GL_UNSIGNED_INT_2_10_10_10_REV:
3185 if (internalFormat != GL_RGB10_A2UI)
3186 return GL_INVALID_OPERATION;
3187 break;
3188
3189 default:
3190 return GL_INVALID_OPERATION;
3191 }
3192 break;
3193
3194 case GL_RGB:
3195 switch (type) {
3196 case GL_UNSIGNED_BYTE:
3197 switch (internalFormat) {
3198 case GL_RGB:
3199 case GL_RGB8:
3200 case GL_RGB565:
3201 break;
3202 case GL_SRGB8:
3203 if (ctx->Version <= 20)
3204 return GL_INVALID_OPERATION;
3205 break;
3206 default:
3207 return GL_INVALID_OPERATION;
3208 }
3209 break;
3210
3211 case GL_BYTE:
3212 if (ctx->Version <= 20 || internalFormat != GL_RGB8_SNORM)
3213 return GL_INVALID_OPERATION;
3214 break;
3215
3216 case GL_UNSIGNED_SHORT:
3217 if (internalFormat != GL_RGB16)
3218 return GL_INVALID_OPERATION;
3219 break;
3220
3221 case GL_SHORT:
3222 if (internalFormat != GL_RGB16_SNORM)
3223 return GL_INVALID_OPERATION;
3224 break;
3225
3226 case GL_UNSIGNED_SHORT_5_6_5:
3227 switch (internalFormat) {
3228 case GL_RGB:
3229 case GL_RGB565:
3230 break;
3231 default:
3232 return GL_INVALID_OPERATION;
3233 }
3234 break;
3235
3236 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3237 if (ctx->Version <= 20 || internalFormat != GL_R11F_G11F_B10F)
3238 return GL_INVALID_OPERATION;
3239 break;
3240
3241 case GL_UNSIGNED_INT_5_9_9_9_REV:
3242 if (ctx->Version <= 20 || internalFormat != GL_RGB9_E5)
3243 return GL_INVALID_OPERATION;
3244 break;
3245
3246 case GL_HALF_FLOAT:
3247 if (ctx->Version <= 20)
3248 return GL_INVALID_OPERATION;
3249 switch (internalFormat) {
3250 case GL_RGB16F:
3251 case GL_R11F_G11F_B10F:
3252 case GL_RGB9_E5:
3253 break;
3254 default:
3255 return GL_INVALID_OPERATION;
3256 }
3257 break;
3258
3259 case GL_FLOAT:
3260 switch (internalFormat) {
3261 case GL_RGB16F:
3262 case GL_RGB32F:
3263 case GL_R11F_G11F_B10F:
3264 case GL_RGB9_E5:
3265 if (ctx->Version <= 20)
3266 return GL_INVALID_OPERATION;
3267 break;
3268 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
3269 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
3270 break;
3271 case GL_RGB:
3272 if (!_mesa_has_OES_texture_float(ctx) || internalFormat != format)
3273 return GL_INVALID_OPERATION;
3274 break;
3275 default:
3276 return GL_INVALID_OPERATION;
3277 }
3278 break;
3279
3280 case GL_HALF_FLOAT_OES:
3281 if (!_mesa_has_OES_texture_half_float(ctx) || internalFormat != format)
3282 return GL_INVALID_OPERATION;
3283 break;
3284
3285 case GL_UNSIGNED_INT_2_10_10_10_REV:
3286 switch (internalFormat) {
3287 case GL_RGB:
3288 case GL_RGB10:
3289 case GL_RGB8:
3290 case GL_RGB565:
3291 /* GL_EXT_texture_type_2_10_10_10_REV allows GL_RGB even though
3292 * GLES3 doesn't, and GL_OES_required_internalformat extends that
3293 * to allow the sized RGB internalformats as well.
3294 */
3295 if (!_mesa_has_texture_type_2_10_10_10_REV(ctx))
3296 return GL_INVALID_OPERATION;
3297 break;
3298 default:
3299 return GL_INVALID_OPERATION;
3300 }
3301 break;
3302
3303 default:
3304 return GL_INVALID_OPERATION;
3305 }
3306 break;
3307
3308 case GL_RGB_INTEGER:
3309 if (ctx->Version <= 20)
3310 return GL_INVALID_OPERATION;
3311 switch (type) {
3312 case GL_UNSIGNED_BYTE:
3313 if (internalFormat != GL_RGB8UI)
3314 return GL_INVALID_OPERATION;
3315 break;
3316
3317 case GL_BYTE:
3318 if (internalFormat != GL_RGB8I)
3319 return GL_INVALID_OPERATION;
3320 break;
3321
3322 case GL_UNSIGNED_SHORT:
3323 if (internalFormat != GL_RGB16UI)
3324 return GL_INVALID_OPERATION;
3325 break;
3326
3327 case GL_SHORT:
3328 if (internalFormat != GL_RGB16I)
3329 return GL_INVALID_OPERATION;
3330 break;
3331
3332 case GL_UNSIGNED_INT:
3333 if (internalFormat != GL_RGB32UI)
3334 return GL_INVALID_OPERATION;
3335 break;
3336
3337 case GL_INT:
3338 if (internalFormat != GL_RGB32I)
3339 return GL_INVALID_OPERATION;
3340 break;
3341
3342 default:
3343 return GL_INVALID_OPERATION;
3344 }
3345 break;
3346
3347 case GL_RG:
3348 if (!_mesa_has_rg_textures(ctx))
3349 return GL_INVALID_OPERATION;
3350 switch (type) {
3351 case GL_UNSIGNED_BYTE:
3352 if (internalFormat != GL_RG8 &&
3353 internalFormat != GL_COMPRESSED_RED_GREEN_RGTC2_EXT &&
3354 internalFormat != GL_SRG8_EXT)
3355 return GL_INVALID_OPERATION;
3356 break;
3357
3358 case GL_BYTE:
3359 if (internalFormat != GL_RG8_SNORM &&
3360 internalFormat != GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT)
3361 return GL_INVALID_OPERATION;
3362 break;
3363
3364 case GL_UNSIGNED_SHORT:
3365 if (internalFormat != GL_RG16)
3366 return GL_INVALID_OPERATION;
3367 break;
3368
3369 case GL_SHORT:
3370 if (internalFormat != GL_RG16_SNORM)
3371 return GL_INVALID_OPERATION;
3372 break;
3373
3374 case GL_HALF_FLOAT:
3375 case GL_HALF_FLOAT_OES:
3376 switch (internalFormat) {
3377 case GL_RG16F:
3378 if (ctx->Version <= 20)
3379 return GL_INVALID_OPERATION;
3380 break;
3381 case GL_RG:
3382 if (!_mesa_has_OES_texture_half_float(ctx))
3383 return GL_INVALID_OPERATION;
3384 break;
3385 default:
3386 return GL_INVALID_OPERATION;
3387 }
3388 break;
3389
3390 case GL_FLOAT:
3391 switch (internalFormat) {
3392 case GL_RG16F:
3393 case GL_RG32F:
3394 break;
3395 case GL_RG:
3396 if (!_mesa_has_OES_texture_float(ctx))
3397 return GL_INVALID_OPERATION;
3398 break;
3399 default:
3400 return GL_INVALID_OPERATION;
3401 }
3402 break;
3403
3404 default:
3405 return GL_INVALID_OPERATION;
3406 }
3407 break;
3408
3409 case GL_RG_INTEGER:
3410 if (ctx->Version <= 20)
3411 return GL_INVALID_OPERATION;
3412 switch (type) {
3413 case GL_UNSIGNED_BYTE:
3414 if (internalFormat != GL_RG8UI)
3415 return GL_INVALID_OPERATION;
3416 break;
3417
3418 case GL_BYTE:
3419 if (internalFormat != GL_RG8I)
3420 return GL_INVALID_OPERATION;
3421 break;
3422
3423 case GL_UNSIGNED_SHORT:
3424 if (internalFormat != GL_RG16UI)
3425 return GL_INVALID_OPERATION;
3426 break;
3427
3428 case GL_SHORT:
3429 if (internalFormat != GL_RG16I)
3430 return GL_INVALID_OPERATION;
3431 break;
3432
3433 case GL_UNSIGNED_INT:
3434 if (internalFormat != GL_RG32UI)
3435 return GL_INVALID_OPERATION;
3436 break;
3437
3438 case GL_INT:
3439 if (internalFormat != GL_RG32I)
3440 return GL_INVALID_OPERATION;
3441 break;
3442
3443 default:
3444 return GL_INVALID_OPERATION;
3445 }
3446 break;
3447
3448 case GL_RED:
3449 if (!_mesa_has_rg_textures(ctx))
3450 return GL_INVALID_OPERATION;
3451 switch (type) {
3452 case GL_UNSIGNED_BYTE:
3453 if (internalFormat != GL_R8 &&
3454 internalFormat != GL_SR8_EXT &&
3455 internalFormat != GL_COMPRESSED_RED_RGTC1_EXT) {
3456 return GL_INVALID_OPERATION;
3457 }
3458 break;
3459
3460 case GL_BYTE:
3461 if (internalFormat != GL_R8_SNORM &&
3462 internalFormat != GL_COMPRESSED_SIGNED_RED_RGTC1_EXT)
3463 return GL_INVALID_OPERATION;
3464 break;
3465
3466 case GL_UNSIGNED_SHORT:
3467 if (internalFormat != GL_R16)
3468 return GL_INVALID_OPERATION;
3469 break;
3470
3471 case GL_SHORT:
3472 if (internalFormat != GL_R16_SNORM)
3473 return GL_INVALID_OPERATION;
3474 break;
3475
3476 case GL_HALF_FLOAT:
3477 case GL_HALF_FLOAT_OES:
3478 switch (internalFormat) {
3479 case GL_R16F:
3480 if (ctx->Version <= 20)
3481 return GL_INVALID_OPERATION;
3482 break;
3483 case GL_RG:
3484 case GL_RED:
3485 if (!_mesa_has_OES_texture_half_float(ctx))
3486 return GL_INVALID_OPERATION;
3487 break;
3488 default:
3489 return GL_INVALID_OPERATION;
3490 }
3491 break;
3492
3493 case GL_FLOAT:
3494 switch (internalFormat) {
3495 case GL_R16F:
3496 case GL_R32F:
3497 break;
3498 case GL_RED:
3499 if (!_mesa_has_OES_texture_float(ctx))
3500 return GL_INVALID_OPERATION;
3501 break;
3502 default:
3503 return GL_INVALID_OPERATION;
3504 }
3505 break;
3506
3507 default:
3508 return GL_INVALID_OPERATION;
3509 }
3510 break;
3511
3512 case GL_RED_INTEGER:
3513 if (ctx->Version <= 20)
3514 return GL_INVALID_OPERATION;
3515 switch (type) {
3516 case GL_UNSIGNED_BYTE:
3517 if (internalFormat != GL_R8UI)
3518 return GL_INVALID_OPERATION;
3519 break;
3520
3521 case GL_BYTE:
3522 if (internalFormat != GL_R8I)
3523 return GL_INVALID_OPERATION;
3524 break;
3525
3526 case GL_UNSIGNED_SHORT:
3527 if (internalFormat != GL_R16UI)
3528 return GL_INVALID_OPERATION;
3529 break;
3530
3531 case GL_SHORT:
3532 if (internalFormat != GL_R16I)
3533 return GL_INVALID_OPERATION;
3534 break;
3535
3536 case GL_UNSIGNED_INT:
3537 if (internalFormat != GL_R32UI)
3538 return GL_INVALID_OPERATION;
3539 break;
3540
3541 case GL_INT:
3542 if (internalFormat != GL_R32I)
3543 return GL_INVALID_OPERATION;
3544 break;
3545
3546 default:
3547 return GL_INVALID_OPERATION;
3548 }
3549 break;
3550
3551 case GL_DEPTH_COMPONENT:
3552 switch (type) {
3553 case GL_UNSIGNED_SHORT:
3554 if (internalFormat != GL_DEPTH_COMPONENT &&
3555 internalFormat != GL_DEPTH_COMPONENT16)
3556 return GL_INVALID_OPERATION;
3557 break;
3558
3559 case GL_UNSIGNED_INT:
3560 switch (internalFormat) {
3561 case GL_DEPTH_COMPONENT:
3562 case GL_DEPTH_COMPONENT16:
3563 case GL_DEPTH_COMPONENT24:
3564 break;
3565 default:
3566 return GL_INVALID_OPERATION;
3567 }
3568 break;
3569
3570 case GL_FLOAT:
3571 if (ctx->Version <= 20 || internalFormat != GL_DEPTH_COMPONENT32F)
3572 return GL_INVALID_OPERATION;
3573 break;
3574
3575 default:
3576 return GL_INVALID_OPERATION;
3577 }
3578 break;
3579
3580 case GL_DEPTH_STENCIL:
3581 switch (type) {
3582 case GL_UNSIGNED_INT_24_8:
3583 if (internalFormat != GL_DEPTH_STENCIL &&
3584 internalFormat != GL_DEPTH24_STENCIL8)
3585 return GL_INVALID_OPERATION;
3586 break;
3587
3588 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3589 if (ctx->Version <= 20 || internalFormat != GL_DEPTH32F_STENCIL8)
3590 return GL_INVALID_OPERATION;
3591 break;
3592
3593 default:
3594 return GL_INVALID_OPERATION;
3595 }
3596 break;
3597
3598 case GL_STENCIL_INDEX:
3599 if (type != GL_UNSIGNED_BYTE ||
3600 internalFormat != GL_STENCIL_INDEX8) {
3601 return GL_INVALID_OPERATION;
3602 }
3603 break;
3604
3605 case GL_ALPHA:
3606 case GL_LUMINANCE:
3607 case GL_LUMINANCE_ALPHA:
3608 switch (type) {
3609 case GL_FLOAT:
3610 if (!_mesa_has_OES_texture_float(ctx) || internalFormat != format)
3611 return GL_INVALID_OPERATION;
3612 break;
3613 case GL_HALF_FLOAT_OES:
3614 if (!_mesa_has_OES_texture_half_float(ctx) || internalFormat != format)
3615 return GL_INVALID_OPERATION;
3616 break;
3617 case GL_UNSIGNED_BYTE:
3618 if (!(format == internalFormat ||
3619 (format == GL_ALPHA && internalFormat == GL_ALPHA8) ||
3620 (format == GL_LUMINANCE && internalFormat == GL_LUMINANCE8) ||
3621 (format == GL_LUMINANCE_ALPHA &&
3622 ((internalFormat == GL_LUMINANCE8_ALPHA8) ||
3623 (internalFormat == GL_LUMINANCE4_ALPHA4))))) {
3624 return GL_INVALID_OPERATION;
3625 }
3626 break;
3627 default:
3628 return GL_INVALID_OPERATION;
3629 }
3630 break;
3631 }
3632
3633 return GL_NO_ERROR;
3634 }
3635
3636 static void
set_swizzle(uint8_t * swizzle,int x,int y,int z,int w)3637 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3638 {
3639 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3640 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3641 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3642 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3643 }
3644
3645 static bool
get_swizzle_from_gl_format(GLenum format,uint8_t * swizzle)3646 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3647 {
3648 switch (format) {
3649 case GL_RGBA:
3650 case GL_RGBA_INTEGER_EXT:
3651 set_swizzle(swizzle, 0, 1, 2, 3);
3652 return true;
3653 case GL_BGRA:
3654 case GL_BGRA_INTEGER_EXT:
3655 set_swizzle(swizzle, 2, 1, 0, 3);
3656 return true;
3657 case GL_ABGR_EXT:
3658 set_swizzle(swizzle, 3, 2, 1, 0);
3659 return true;
3660 case GL_RGB:
3661 case GL_RGB_INTEGER_EXT:
3662 set_swizzle(swizzle, 0, 1, 2, 5);
3663 return true;
3664 case GL_BGR:
3665 case GL_BGR_INTEGER_EXT:
3666 set_swizzle(swizzle, 2, 1, 0, 5);
3667 return true;
3668 case GL_LUMINANCE_ALPHA:
3669 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3670 set_swizzle(swizzle, 0, 0, 0, 1);
3671 return true;
3672 case GL_RG:
3673 case GL_RG_INTEGER:
3674 set_swizzle(swizzle, 0, 1, 4, 5);
3675 return true;
3676 case GL_RED:
3677 case GL_RED_INTEGER_EXT:
3678 set_swizzle(swizzle, 0, 4, 4, 5);
3679 return true;
3680 case GL_GREEN:
3681 case GL_GREEN_INTEGER_EXT:
3682 set_swizzle(swizzle, 4, 0, 4, 5);
3683 return true;
3684 case GL_BLUE:
3685 case GL_BLUE_INTEGER_EXT:
3686 set_swizzle(swizzle, 4, 4, 0, 5);
3687 return true;
3688 case GL_ALPHA:
3689 case GL_ALPHA_INTEGER_EXT:
3690 set_swizzle(swizzle, 4, 4, 4, 0);
3691 return true;
3692 case GL_LUMINANCE:
3693 case GL_LUMINANCE_INTEGER_EXT:
3694 set_swizzle(swizzle, 0, 0, 0, 5);
3695 return true;
3696 case GL_INTENSITY:
3697 set_swizzle(swizzle, 0, 0, 0, 0);
3698 return true;
3699 case GL_DEPTH_COMPONENT:
3700 set_swizzle(swizzle, 0, 6, 6, 6);
3701 return true;
3702 case GL_STENCIL_INDEX:
3703 set_swizzle(swizzle, 6, 0, 6, 6);
3704 return true;
3705 default:
3706 return false;
3707 }
3708 }
3709
3710 bool
_mesa_swap_bytes_in_type_enum(GLenum * type)3711 _mesa_swap_bytes_in_type_enum(GLenum *type)
3712 {
3713 switch (*type) {
3714 case GL_UNSIGNED_INT_8_8_8_8:
3715 *type = GL_UNSIGNED_INT_8_8_8_8_REV;
3716 return true;
3717 case GL_UNSIGNED_INT_8_8_8_8_REV:
3718 *type = GL_UNSIGNED_INT_8_8_8_8;
3719 return true;
3720 case GL_UNSIGNED_SHORT_8_8_MESA:
3721 *type = GL_UNSIGNED_SHORT_8_8_REV_MESA;
3722 return true;
3723 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3724 *type = GL_UNSIGNED_SHORT_8_8_MESA;
3725 return true;
3726 case GL_BYTE:
3727 case GL_UNSIGNED_BYTE:
3728 /* format/types that are arrays of 8-bit values are unaffected by
3729 * swapBytes.
3730 */
3731 return true;
3732 default:
3733 /* swapping bytes on 4444, 1555, or >8 bit per channel types etc. will
3734 * never match a Mesa format.
3735 */
3736 return false;
3737 }
3738 }
3739
3740 /**
3741 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3742 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3743 * otherwise (for non-array formats).
3744 *
3745 * This function will typically be used to compute a mesa format from a GL type
3746 * so we can then call _mesa_format_convert. This function does
3747 * not consider byte swapping, so it returns types assuming that no byte
3748 * swapping is involved. If byte swapping is involved then clients are supposed
3749 * to handle that on their side before calling _mesa_format_convert.
3750 *
3751 * This function returns an uint32_t that can pack a mesa_format or a
3752 * mesa_array_format. Clients must check the mesa array format bit
3753 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3754 * format is a mesa_array_format or a mesa_format.
3755 */
3756 uint32_t
_mesa_format_from_format_and_type(GLenum format,GLenum type)3757 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3758 {
3759 bool is_array_format = true;
3760 uint8_t swizzle[4];
3761 bool normalized = false, is_float = false, is_signed = false;
3762 int num_channels = 0, type_size = 0;
3763
3764 if (format == GL_COLOR_INDEX)
3765 return MESA_FORMAT_NONE;
3766
3767 /* Extract array format type information from the OpenGL data type */
3768 switch (type) {
3769 case GL_UNSIGNED_BYTE:
3770 type_size = 1;
3771 break;
3772 case GL_BYTE:
3773 type_size = 1;
3774 is_signed = true;
3775 break;
3776 case GL_UNSIGNED_SHORT:
3777 type_size = 2;
3778 break;
3779 case GL_SHORT:
3780 type_size = 2;
3781 is_signed = true;
3782 break;
3783 case GL_UNSIGNED_INT:
3784 type_size = 4;
3785 break;
3786 case GL_INT:
3787 type_size = 4;
3788 is_signed = true;
3789 break;
3790 case GL_HALF_FLOAT:
3791 case GL_HALF_FLOAT_OES:
3792 type_size = 2;
3793 is_signed = true;
3794 is_float = true;
3795 break;
3796 case GL_FLOAT:
3797 type_size = 4;
3798 is_signed = true;
3799 is_float = true;
3800 break;
3801 default:
3802 is_array_format = false;
3803 break;
3804 }
3805
3806 /* Extract array format swizzle information from the OpenGL format */
3807 if (is_array_format)
3808 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3809
3810 /* If this is an array format type after checking data type and format,
3811 * create the array format
3812 */
3813 if (is_array_format) {
3814 enum mesa_array_format_base_format bf;
3815 switch (format) {
3816 case GL_DEPTH_COMPONENT:
3817 bf = MESA_ARRAY_FORMAT_BASE_FORMAT_DEPTH;
3818 break;
3819 case GL_STENCIL_INDEX:
3820 bf = MESA_ARRAY_FORMAT_BASE_FORMAT_STENCIL;
3821 break;
3822 default:
3823 bf = MESA_ARRAY_FORMAT_BASE_FORMAT_RGBA_VARIANTS;
3824 break;
3825 }
3826
3827 normalized = !(_mesa_is_enum_format_integer(format) ||
3828 format == GL_STENCIL_INDEX);
3829 num_channels = _mesa_components_in_format(format);
3830
3831 return MESA_ARRAY_FORMAT(bf, type_size, is_signed, is_float,
3832 normalized, num_channels,
3833 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3834 }
3835
3836 /* Otherwise this is not an array format, so return the mesa_format
3837 * matching the OpenGL format and data type
3838 */
3839 switch (type) {
3840 case GL_UNSIGNED_SHORT_5_6_5:
3841 if (format == GL_RGB)
3842 return MESA_FORMAT_B5G6R5_UNORM;
3843 else if (format == GL_BGR)
3844 return MESA_FORMAT_R5G6B5_UNORM;
3845 else if (format == GL_RGB_INTEGER)
3846 return MESA_FORMAT_B5G6R5_UINT;
3847 break;
3848 case GL_UNSIGNED_SHORT_5_6_5_REV:
3849 if (format == GL_RGB)
3850 return MESA_FORMAT_R5G6B5_UNORM;
3851 else if (format == GL_BGR)
3852 return MESA_FORMAT_B5G6R5_UNORM;
3853 else if (format == GL_RGB_INTEGER)
3854 return MESA_FORMAT_R5G6B5_UINT;
3855 break;
3856 case GL_UNSIGNED_SHORT_4_4_4_4:
3857 if (format == GL_RGBA)
3858 return MESA_FORMAT_A4B4G4R4_UNORM;
3859 else if (format == GL_BGRA)
3860 return MESA_FORMAT_A4R4G4B4_UNORM;
3861 else if (format == GL_ABGR_EXT)
3862 return MESA_FORMAT_R4G4B4A4_UNORM;
3863 else if (format == GL_RGBA_INTEGER)
3864 return MESA_FORMAT_A4B4G4R4_UINT;
3865 else if (format == GL_BGRA_INTEGER)
3866 return MESA_FORMAT_A4R4G4B4_UINT;
3867 break;
3868 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3869 if (format == GL_RGBA)
3870 return MESA_FORMAT_R4G4B4A4_UNORM;
3871 else if (format == GL_BGRA)
3872 return MESA_FORMAT_B4G4R4A4_UNORM;
3873 else if (format == GL_ABGR_EXT)
3874 return MESA_FORMAT_A4B4G4R4_UNORM;
3875 else if (format == GL_RGBA_INTEGER)
3876 return MESA_FORMAT_R4G4B4A4_UINT;
3877 else if (format == GL_BGRA_INTEGER)
3878 return MESA_FORMAT_B4G4R4A4_UINT;
3879 break;
3880 case GL_UNSIGNED_SHORT_5_5_5_1:
3881 if (format == GL_RGBA)
3882 return MESA_FORMAT_A1B5G5R5_UNORM;
3883 else if (format == GL_BGRA)
3884 return MESA_FORMAT_A1R5G5B5_UNORM;
3885 else if (format == GL_RGBA_INTEGER)
3886 return MESA_FORMAT_A1B5G5R5_UINT;
3887 else if (format == GL_BGRA_INTEGER)
3888 return MESA_FORMAT_A1R5G5B5_UINT;
3889 break;
3890 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3891 if (format == GL_RGBA)
3892 return MESA_FORMAT_R5G5B5A1_UNORM;
3893 else if (format == GL_BGRA)
3894 return MESA_FORMAT_B5G5R5A1_UNORM;
3895 else if (format == GL_RGBA_INTEGER)
3896 return MESA_FORMAT_R5G5B5A1_UINT;
3897 else if (format == GL_BGRA_INTEGER)
3898 return MESA_FORMAT_B5G5R5A1_UINT;
3899 break;
3900 case GL_UNSIGNED_BYTE_3_3_2:
3901 if (format == GL_RGB)
3902 return MESA_FORMAT_B2G3R3_UNORM;
3903 else if (format == GL_RGB_INTEGER)
3904 return MESA_FORMAT_B2G3R3_UINT;
3905 break;
3906 case GL_UNSIGNED_BYTE_2_3_3_REV:
3907 if (format == GL_RGB)
3908 return MESA_FORMAT_R3G3B2_UNORM;
3909 else if (format == GL_RGB_INTEGER)
3910 return MESA_FORMAT_R3G3B2_UINT;
3911 break;
3912 case GL_UNSIGNED_INT_5_9_9_9_REV:
3913 if (format == GL_RGB)
3914 return MESA_FORMAT_R9G9B9E5_FLOAT;
3915 break;
3916 case GL_UNSIGNED_INT_10_10_10_2:
3917 if (format == GL_RGBA)
3918 return MESA_FORMAT_A2B10G10R10_UNORM;
3919 else if (format == GL_RGBA_INTEGER)
3920 return MESA_FORMAT_A2B10G10R10_UINT;
3921 else if (format == GL_BGRA)
3922 return MESA_FORMAT_A2R10G10B10_UNORM;
3923 else if (format == GL_BGRA_INTEGER)
3924 return MESA_FORMAT_A2R10G10B10_UINT;
3925 break;
3926 case GL_UNSIGNED_INT_2_10_10_10_REV:
3927 if (format == GL_RGB)
3928 return MESA_FORMAT_R10G10B10X2_UNORM;
3929 if (format == GL_RGBA)
3930 return MESA_FORMAT_R10G10B10A2_UNORM;
3931 else if (format == GL_RGBA_INTEGER)
3932 return MESA_FORMAT_R10G10B10A2_UINT;
3933 else if (format == GL_BGRA)
3934 return MESA_FORMAT_B10G10R10A2_UNORM;
3935 else if (format == GL_BGRA_INTEGER)
3936 return MESA_FORMAT_B10G10R10A2_UINT;
3937 break;
3938 case GL_UNSIGNED_INT_8_8_8_8:
3939 if (format == GL_RGBA)
3940 return MESA_FORMAT_A8B8G8R8_UNORM;
3941 else if (format == GL_BGRA)
3942 return MESA_FORMAT_A8R8G8B8_UNORM;
3943 else if (format == GL_ABGR_EXT)
3944 return MESA_FORMAT_R8G8B8A8_UNORM;
3945 else if (format == GL_RGBA_INTEGER)
3946 return MESA_FORMAT_A8B8G8R8_UINT;
3947 else if (format == GL_BGRA_INTEGER)
3948 return MESA_FORMAT_A8R8G8B8_UINT;
3949 break;
3950 case GL_UNSIGNED_INT_8_8_8_8_REV:
3951 if (format == GL_RGBA)
3952 return MESA_FORMAT_R8G8B8A8_UNORM;
3953 else if (format == GL_BGRA)
3954 return MESA_FORMAT_B8G8R8A8_UNORM;
3955 else if (format == GL_ABGR_EXT)
3956 return MESA_FORMAT_A8B8G8R8_UNORM;
3957 else if (format == GL_RGBA_INTEGER)
3958 return MESA_FORMAT_R8G8B8A8_UINT;
3959 else if (format == GL_BGRA_INTEGER)
3960 return MESA_FORMAT_B8G8R8A8_UINT;
3961 break;
3962 case GL_UNSIGNED_SHORT_8_8_MESA:
3963 if (format == GL_YCBCR_MESA)
3964 return MESA_FORMAT_YCBCR;
3965 break;
3966 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3967 if (format == GL_YCBCR_MESA)
3968 return MESA_FORMAT_YCBCR_REV;
3969 break;
3970 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3971 if (format == GL_RGB)
3972 return MESA_FORMAT_R11G11B10_FLOAT;
3973 break;
3974 case GL_FLOAT:
3975 if (format == GL_DEPTH_COMPONENT)
3976 return MESA_FORMAT_Z_FLOAT32;
3977 break;
3978 case GL_UNSIGNED_INT:
3979 if (format == GL_DEPTH_COMPONENT)
3980 return MESA_FORMAT_Z_UNORM32;
3981 break;
3982 case GL_UNSIGNED_SHORT:
3983 if (format == GL_DEPTH_COMPONENT)
3984 return MESA_FORMAT_Z_UNORM16;
3985 break;
3986 case GL_UNSIGNED_INT_24_8:
3987 if (format == GL_DEPTH_STENCIL)
3988 return MESA_FORMAT_S8_UINT_Z24_UNORM;
3989 else if (format == GL_DEPTH_COMPONENT)
3990 return MESA_FORMAT_X8_UINT_Z24_UNORM;
3991 break;
3992 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3993 if (format == GL_DEPTH_STENCIL)
3994 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3995 break;
3996 default:
3997 break;
3998 }
3999
4000 fprintf(stderr, "Unsupported format/type: %s/%s\n",
4001 _mesa_enum_to_string(format),
4002 _mesa_enum_to_string(type));
4003
4004 /* If we got here it means that we could not find a Mesa format that
4005 * matches the GL format/type provided. We may need to add a new Mesa
4006 * format in that case.
4007 */
4008 unreachable("Unsupported format");
4009 }
4010
4011 uint32_t
_mesa_tex_format_from_format_and_type(const struct gl_context * ctx,GLenum gl_format,GLenum type)4012 _mesa_tex_format_from_format_and_type(const struct gl_context *ctx,
4013 GLenum gl_format, GLenum type)
4014 {
4015 mesa_format format = _mesa_format_from_format_and_type(gl_format, type);
4016
4017 if (_mesa_format_is_mesa_array_format(format))
4018 format = _mesa_format_from_array_format(format);
4019
4020 if (format == MESA_FORMAT_NONE || !ctx->TextureFormatSupported[format])
4021 return MESA_FORMAT_NONE;
4022
4023 return format;
4024 }
4025
4026 /**
4027 * Returns true if \p internal_format is a sized internal format that
4028 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
4029 */
4030 bool
_mesa_is_es3_color_renderable(const struct gl_context * ctx,GLenum internal_format)4031 _mesa_is_es3_color_renderable(const struct gl_context *ctx,
4032 GLenum internal_format)
4033 {
4034 switch (internal_format) {
4035 case GL_R8:
4036 case GL_RG8:
4037 case GL_RGB8:
4038 case GL_RGB565:
4039 case GL_RGBA4:
4040 case GL_RGB5_A1:
4041 case GL_RGBA8:
4042 case GL_RGB10_A2:
4043 case GL_RGB10_A2UI:
4044 case GL_SRGB8_ALPHA8:
4045 case GL_R16F:
4046 case GL_RG16F:
4047 case GL_RGBA16F:
4048 case GL_R32F:
4049 case GL_RG32F:
4050 case GL_RGBA32F:
4051 case GL_R11F_G11F_B10F:
4052 case GL_R8I:
4053 case GL_R8UI:
4054 case GL_R16I:
4055 case GL_R16UI:
4056 case GL_R32I:
4057 case GL_R32UI:
4058 case GL_RG8I:
4059 case GL_RG8UI:
4060 case GL_RG16I:
4061 case GL_RG16UI:
4062 case GL_RG32I:
4063 case GL_RG32UI:
4064 case GL_RGBA8I:
4065 case GL_RGBA8UI:
4066 case GL_RGBA16I:
4067 case GL_RGBA16UI:
4068 case GL_RGBA32I:
4069 case GL_RGBA32UI:
4070 return true;
4071 case GL_R16:
4072 case GL_RG16:
4073 case GL_RGBA16:
4074 return _mesa_has_EXT_texture_norm16(ctx);
4075 case GL_R8_SNORM:
4076 case GL_RG8_SNORM:
4077 case GL_RGBA8_SNORM:
4078 return _mesa_has_EXT_render_snorm(ctx);
4079 case GL_R16_SNORM:
4080 case GL_RG16_SNORM:
4081 case GL_RGBA16_SNORM:
4082 return _mesa_has_EXT_texture_norm16(ctx) &&
4083 _mesa_has_EXT_render_snorm(ctx);
4084 default:
4085 return false;
4086 }
4087 }
4088
4089 /**
4090 * Returns true if \p internal_format is a sized internal format that
4091 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
4092 */
4093 bool
_mesa_is_es3_texture_filterable(const struct gl_context * ctx,GLenum internal_format)4094 _mesa_is_es3_texture_filterable(const struct gl_context *ctx,
4095 GLenum internal_format)
4096 {
4097 switch (internal_format) {
4098 case GL_R8:
4099 case GL_R8_SNORM:
4100 case GL_RG8:
4101 case GL_RG8_SNORM:
4102 case GL_RGB8:
4103 case GL_RGB8_SNORM:
4104 case GL_RGB565:
4105 case GL_RGBA4:
4106 case GL_RGB5_A1:
4107 case GL_RGBA8:
4108 case GL_RGBA8_SNORM:
4109 case GL_RGB10_A2:
4110 case GL_SRGB8:
4111 case GL_SRGB8_ALPHA8:
4112 case GL_R16F:
4113 case GL_RG16F:
4114 case GL_RGB16F:
4115 case GL_RGBA16F:
4116 case GL_R11F_G11F_B10F:
4117 case GL_RGB9_E5:
4118 return true;
4119 case GL_R16:
4120 case GL_R16_SNORM:
4121 case GL_RG16:
4122 case GL_RG16_SNORM:
4123 case GL_RGB16:
4124 case GL_RGB16_SNORM:
4125 case GL_RGBA16:
4126 case GL_RGBA16_SNORM:
4127 return _mesa_has_EXT_texture_norm16(ctx);
4128 case GL_R32F:
4129 case GL_RG32F:
4130 case GL_RGB32F:
4131 case GL_RGBA32F:
4132 /* The OES_texture_float_linear spec says:
4133 *
4134 * "When implemented against OpenGL ES 3.0 or later versions, sized
4135 * 32-bit floating-point formats become texture-filterable. This
4136 * should be noted by, for example, checking the ``TF'' column of
4137 * table 8.13 in the ES 3.1 Specification (``Correspondence of sized
4138 * internal formats to base internal formats ... and use cases ...'')
4139 * for the R32F, RG32F, RGB32F, and RGBA32F formats."
4140 */
4141 return _mesa_has_OES_texture_float_linear(ctx);
4142 default:
4143 return false;
4144 }
4145 }
4146