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