1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008-2009 VMware, Inc.
6 * Copyright (c) 2012 Intel Corporation
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27
28 #include "context.h"
29 #include "glformats.h"
30 #include "formats.h"
31 #include "texcompress.h"
32 #include "enums.h"
33
34 enum {
35 ZERO = 4,
36 ONE = 5
37 };
38
39 enum {
40 IDX_LUMINANCE = 0,
41 IDX_ALPHA,
42 IDX_INTENSITY,
43 IDX_LUMINANCE_ALPHA,
44 IDX_RGB,
45 IDX_RGBA,
46 IDX_RED,
47 IDX_GREEN,
48 IDX_BLUE,
49 IDX_BGR,
50 IDX_BGRA,
51 IDX_ABGR,
52 IDX_RG,
53 MAX_IDX
54 };
55
56 #define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
57 #define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
58 #define MAP3(x,y,z) MAP4(x, y, z, ZERO)
59 #define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
60
61 static const struct {
62 GLubyte format_idx;
63 GLubyte to_rgba[6];
64 GLubyte from_rgba[6];
65 } mappings[MAX_IDX] =
66 {
67 {
68 IDX_LUMINANCE,
69 MAP4(0,0,0,ONE),
70 MAP1(0)
71 },
72
73 {
74 IDX_ALPHA,
75 MAP4(ZERO, ZERO, ZERO, 0),
76 MAP1(3)
77 },
78
79 {
80 IDX_INTENSITY,
81 MAP4(0, 0, 0, 0),
82 MAP1(0),
83 },
84
85 {
86 IDX_LUMINANCE_ALPHA,
87 MAP4(0,0,0,1),
88 MAP2(0,3)
89 },
90
91 {
92 IDX_RGB,
93 MAP4(0,1,2,ONE),
94 MAP3(0,1,2)
95 },
96
97 {
98 IDX_RGBA,
99 MAP4(0,1,2,3),
100 MAP4(0,1,2,3),
101 },
102
103 {
104 IDX_RED,
105 MAP4(0, ZERO, ZERO, ONE),
106 MAP1(0),
107 },
108
109 {
110 IDX_GREEN,
111 MAP4(ZERO, 0, ZERO, ONE),
112 MAP1(1),
113 },
114
115 {
116 IDX_BLUE,
117 MAP4(ZERO, ZERO, 0, ONE),
118 MAP1(2),
119 },
120
121 {
122 IDX_BGR,
123 MAP4(2,1,0,ONE),
124 MAP3(2,1,0)
125 },
126
127 {
128 IDX_BGRA,
129 MAP4(2,1,0,3),
130 MAP4(2,1,0,3)
131 },
132
133 {
134 IDX_ABGR,
135 MAP4(3,2,1,0),
136 MAP4(3,2,1,0)
137 },
138
139 {
140 IDX_RG,
141 MAP4(0, 1, ZERO, ONE),
142 MAP2(0, 1)
143 },
144 };
145
146 /**
147 * Convert a GL image format enum to an IDX_* value (see above).
148 */
149 static int
get_map_idx(GLenum value)150 get_map_idx(GLenum value)
151 {
152 switch (value) {
153 case GL_LUMINANCE:
154 case GL_LUMINANCE_INTEGER_EXT:
155 return IDX_LUMINANCE;
156 case GL_ALPHA:
157 case GL_ALPHA_INTEGER:
158 return IDX_ALPHA;
159 case GL_INTENSITY:
160 return IDX_INTENSITY;
161 case GL_LUMINANCE_ALPHA:
162 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
163 return IDX_LUMINANCE_ALPHA;
164 case GL_RGB:
165 case GL_RGB_INTEGER:
166 return IDX_RGB;
167 case GL_RGBA:
168 case GL_RGBA_INTEGER:
169 return IDX_RGBA;
170 case GL_RED:
171 case GL_RED_INTEGER:
172 return IDX_RED;
173 case GL_GREEN:
174 return IDX_GREEN;
175 case GL_BLUE:
176 return IDX_BLUE;
177 case GL_BGR:
178 case GL_BGR_INTEGER:
179 return IDX_BGR;
180 case GL_BGRA:
181 case GL_BGRA_INTEGER:
182 return IDX_BGRA;
183 case GL_ABGR_EXT:
184 return IDX_ABGR;
185 case GL_RG:
186 case GL_RG_INTEGER:
187 return IDX_RG;
188 default:
189 _mesa_problem(NULL, "Unexpected inFormat %s",
190 _mesa_enum_to_string(value));
191 return 0;
192 }
193 }
194
195 /**
196 * When promoting texture formats (see below) we need to compute the
197 * mapping of dest components back to source components.
198 * This function does that.
199 * \param inFormat the incoming format of the texture
200 * \param outFormat the final texture format
201 * \return map[6] a full 6-component map
202 */
203 void
_mesa_compute_component_mapping(GLenum inFormat,GLenum outFormat,GLubyte * map)204 _mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
205 {
206 const int inFmt = get_map_idx(inFormat);
207 const int outFmt = get_map_idx(outFormat);
208 const GLubyte *in2rgba = mappings[inFmt].to_rgba;
209 const GLubyte *rgba2out = mappings[outFmt].from_rgba;
210 int i;
211
212 for (i = 0; i < 4; i++)
213 map[i] = in2rgba[rgba2out[i]];
214
215 map[ZERO] = ZERO;
216 map[ONE] = ONE;
217
218 #if 0
219 printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
220 inFormat, _mesa_enum_to_string(inFormat),
221 outFormat, _mesa_enum_to_string(outFormat),
222 map[0],
223 map[1],
224 map[2],
225 map[3],
226 map[4],
227 map[5]);
228 #endif
229 }
230
231 /**
232 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
233 */
234 GLboolean
_mesa_type_is_packed(GLenum type)235 _mesa_type_is_packed(GLenum type)
236 {
237 switch (type) {
238 case GL_UNSIGNED_BYTE_3_3_2:
239 case GL_UNSIGNED_BYTE_2_3_3_REV:
240 case MESA_UNSIGNED_BYTE_4_4:
241 case GL_UNSIGNED_SHORT_5_6_5:
242 case GL_UNSIGNED_SHORT_5_6_5_REV:
243 case GL_UNSIGNED_SHORT_4_4_4_4:
244 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
245 case GL_UNSIGNED_SHORT_5_5_5_1:
246 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
247 case GL_UNSIGNED_INT_8_8_8_8:
248 case GL_UNSIGNED_INT_8_8_8_8_REV:
249 case GL_UNSIGNED_INT_10_10_10_2:
250 case GL_UNSIGNED_INT_2_10_10_10_REV:
251 case GL_UNSIGNED_SHORT_8_8_MESA:
252 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
253 case GL_UNSIGNED_INT_24_8_EXT:
254 case GL_UNSIGNED_INT_5_9_9_9_REV:
255 case GL_UNSIGNED_INT_10F_11F_11F_REV:
256 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
257 return GL_TRUE;
258 }
259
260 return GL_FALSE;
261 }
262
263
264 /**
265 * Get the size of a GL data type.
266 *
267 * \param type GL data type.
268 *
269 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
270 * if an invalid type enum.
271 */
272 GLint
_mesa_sizeof_type(GLenum type)273 _mesa_sizeof_type(GLenum type)
274 {
275 switch (type) {
276 case GL_BITMAP:
277 return 0;
278 case GL_UNSIGNED_BYTE:
279 return sizeof(GLubyte);
280 case GL_BYTE:
281 return sizeof(GLbyte);
282 case GL_UNSIGNED_SHORT:
283 return sizeof(GLushort);
284 case GL_SHORT:
285 return sizeof(GLshort);
286 case GL_UNSIGNED_INT:
287 return sizeof(GLuint);
288 case GL_INT:
289 return sizeof(GLint);
290 case GL_FLOAT:
291 return sizeof(GLfloat);
292 case GL_DOUBLE:
293 return sizeof(GLdouble);
294 case GL_HALF_FLOAT_ARB:
295 case GL_HALF_FLOAT_OES:
296 return sizeof(GLhalfARB);
297 case GL_FIXED:
298 return sizeof(GLfixed);
299 default:
300 return -1;
301 }
302 }
303
304
305 /**
306 * Same as _mesa_sizeof_type() but also accepting the packed pixel
307 * format data types.
308 */
309 GLint
_mesa_sizeof_packed_type(GLenum type)310 _mesa_sizeof_packed_type(GLenum type)
311 {
312 switch (type) {
313 case GL_BITMAP:
314 return 0;
315 case GL_UNSIGNED_BYTE:
316 return sizeof(GLubyte);
317 case GL_BYTE:
318 return sizeof(GLbyte);
319 case GL_UNSIGNED_SHORT:
320 return sizeof(GLushort);
321 case GL_SHORT:
322 return sizeof(GLshort);
323 case GL_UNSIGNED_INT:
324 return sizeof(GLuint);
325 case GL_INT:
326 return sizeof(GLint);
327 case GL_HALF_FLOAT_ARB:
328 case GL_HALF_FLOAT_OES:
329 return sizeof(GLhalfARB);
330 case GL_FLOAT:
331 return sizeof(GLfloat);
332 case GL_UNSIGNED_BYTE_3_3_2:
333 case GL_UNSIGNED_BYTE_2_3_3_REV:
334 case MESA_UNSIGNED_BYTE_4_4:
335 return sizeof(GLubyte);
336 case GL_UNSIGNED_SHORT_5_6_5:
337 case GL_UNSIGNED_SHORT_5_6_5_REV:
338 case GL_UNSIGNED_SHORT_4_4_4_4:
339 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
340 case GL_UNSIGNED_SHORT_5_5_5_1:
341 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
342 case GL_UNSIGNED_SHORT_8_8_MESA:
343 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
344 return sizeof(GLushort);
345 case GL_UNSIGNED_INT_8_8_8_8:
346 case GL_UNSIGNED_INT_8_8_8_8_REV:
347 case GL_UNSIGNED_INT_10_10_10_2:
348 case GL_UNSIGNED_INT_2_10_10_10_REV:
349 case GL_UNSIGNED_INT_24_8_EXT:
350 case GL_UNSIGNED_INT_5_9_9_9_REV:
351 case GL_UNSIGNED_INT_10F_11F_11F_REV:
352 return sizeof(GLuint);
353 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
354 return 8;
355 default:
356 return -1;
357 }
358 }
359
360
361 /**
362 * Get the number of components in a pixel format.
363 *
364 * \param format pixel format.
365 *
366 * \return the number of components in the given format, or -1 if a bad format.
367 */
368 GLint
_mesa_components_in_format(GLenum format)369 _mesa_components_in_format(GLenum format)
370 {
371 switch (format) {
372 case GL_COLOR_INDEX:
373 case GL_STENCIL_INDEX:
374 case GL_DEPTH_COMPONENT:
375 case GL_RED:
376 case GL_RED_INTEGER_EXT:
377 case GL_GREEN:
378 case GL_GREEN_INTEGER_EXT:
379 case GL_BLUE:
380 case GL_BLUE_INTEGER_EXT:
381 case GL_ALPHA:
382 case GL_ALPHA_INTEGER_EXT:
383 case GL_LUMINANCE:
384 case GL_LUMINANCE_INTEGER_EXT:
385 case GL_INTENSITY:
386 return 1;
387
388 case GL_LUMINANCE_ALPHA:
389 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
390 case GL_RG:
391 case GL_YCBCR_MESA:
392 case GL_DEPTH_STENCIL_EXT:
393 case GL_RG_INTEGER:
394 return 2;
395
396 case GL_RGB:
397 case GL_BGR:
398 case GL_RGB_INTEGER_EXT:
399 case GL_BGR_INTEGER_EXT:
400 return 3;
401
402 case GL_RGBA:
403 case GL_BGRA:
404 case GL_ABGR_EXT:
405 case GL_RGBA_INTEGER_EXT:
406 case GL_BGRA_INTEGER_EXT:
407 return 4;
408
409 default:
410 return -1;
411 }
412 }
413
414
415 /**
416 * Get the bytes per pixel of pixel format type pair.
417 *
418 * \param format pixel format.
419 * \param type pixel type.
420 *
421 * \return bytes per pixel, or -1 if a bad format or type was given.
422 */
423 GLint
_mesa_bytes_per_pixel(GLenum format,GLenum type)424 _mesa_bytes_per_pixel(GLenum format, GLenum type)
425 {
426 GLint comps = _mesa_components_in_format(format);
427 if (comps < 0)
428 return -1;
429
430 switch (type) {
431 case GL_BITMAP:
432 return 0; /* special case */
433 case GL_BYTE:
434 case GL_UNSIGNED_BYTE:
435 return comps * sizeof(GLubyte);
436 case GL_SHORT:
437 case GL_UNSIGNED_SHORT:
438 return comps * sizeof(GLshort);
439 case GL_INT:
440 case GL_UNSIGNED_INT:
441 return comps * sizeof(GLint);
442 case GL_FLOAT:
443 return comps * sizeof(GLfloat);
444 case GL_HALF_FLOAT_ARB:
445 case GL_HALF_FLOAT_OES:
446 return comps * sizeof(GLhalfARB);
447 case GL_UNSIGNED_BYTE_3_3_2:
448 case GL_UNSIGNED_BYTE_2_3_3_REV:
449 if (format == GL_RGB || format == GL_BGR ||
450 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
451 return sizeof(GLubyte);
452 else
453 return -1; /* error */
454 case GL_UNSIGNED_SHORT_5_6_5:
455 case GL_UNSIGNED_SHORT_5_6_5_REV:
456 if (format == GL_RGB || format == GL_BGR ||
457 format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
458 return sizeof(GLushort);
459 else
460 return -1; /* error */
461 case GL_UNSIGNED_SHORT_4_4_4_4:
462 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
463 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
464 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
465 return sizeof(GLushort);
466 else
467 return -1;
468 case GL_UNSIGNED_SHORT_5_5_5_1:
469 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
470 if (format == GL_RGBA || format == GL_BGRA ||
471 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
472 return sizeof(GLushort);
473 else
474 return -1;
475 case GL_UNSIGNED_INT_8_8_8_8:
476 case GL_UNSIGNED_INT_8_8_8_8_REV:
477 if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
478 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
479 format == GL_RGB)
480 return sizeof(GLuint);
481 else
482 return -1;
483 case GL_UNSIGNED_INT_10_10_10_2:
484 case GL_UNSIGNED_INT_2_10_10_10_REV:
485 if (format == GL_RGBA || format == GL_BGRA ||
486 format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
487 format == GL_RGB)
488 return sizeof(GLuint);
489 else
490 return -1;
491 case GL_UNSIGNED_SHORT_8_8_MESA:
492 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
493 if (format == GL_YCBCR_MESA)
494 return sizeof(GLushort);
495 else
496 return -1;
497 case GL_UNSIGNED_INT_24_8_EXT:
498 if (format == GL_DEPTH_COMPONENT ||
499 format == GL_DEPTH_STENCIL_EXT)
500 return sizeof(GLuint);
501 else
502 return -1;
503 case GL_UNSIGNED_INT_5_9_9_9_REV:
504 if (format == GL_RGB)
505 return sizeof(GLuint);
506 else
507 return -1;
508 case GL_UNSIGNED_INT_10F_11F_11F_REV:
509 if (format == GL_RGB)
510 return sizeof(GLuint);
511 else
512 return -1;
513 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
514 if (format == GL_DEPTH_STENCIL)
515 return 8;
516 else
517 return -1;
518 default:
519 return -1;
520 }
521 }
522
523
524 /**
525 * Get the number of bytes for a vertex attrib with the given number of
526 * components and type.
527 *
528 * \param comps number of components.
529 * \param type data type.
530 *
531 * \return bytes per attribute, or -1 if a bad comps/type combination was given.
532 */
533 GLint
_mesa_bytes_per_vertex_attrib(GLint comps,GLenum type)534 _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
535 {
536 switch (type) {
537 case GL_BYTE:
538 case GL_UNSIGNED_BYTE:
539 return comps * sizeof(GLubyte);
540 case GL_SHORT:
541 case GL_UNSIGNED_SHORT:
542 return comps * sizeof(GLshort);
543 case GL_INT:
544 case GL_UNSIGNED_INT:
545 return comps * sizeof(GLint);
546 case GL_FLOAT:
547 return comps * sizeof(GLfloat);
548 case GL_HALF_FLOAT_ARB:
549 case GL_HALF_FLOAT_OES:
550 return comps * sizeof(GLhalfARB);
551 case GL_DOUBLE:
552 return comps * sizeof(GLdouble);
553 case GL_FIXED:
554 return comps * sizeof(GLfixed);
555 case GL_INT_2_10_10_10_REV:
556 case GL_UNSIGNED_INT_2_10_10_10_REV:
557 if (comps == 4)
558 return sizeof(GLuint);
559 else
560 return -1;
561 case GL_UNSIGNED_INT_10F_11F_11F_REV:
562 if (comps == 3)
563 return sizeof(GLuint);
564 else
565 return -1;
566 case GL_UNSIGNED_INT64_ARB:
567 return comps * 8;
568 default:
569 return -1;
570 }
571 }
572
573 /**
574 * Test if the given format is unsized.
575 */
576 GLboolean
_mesa_is_enum_format_unsized(GLenum format)577 _mesa_is_enum_format_unsized(GLenum format)
578 {
579 switch (format) {
580 case GL_RGBA:
581 case GL_BGRA:
582 case GL_ABGR_EXT:
583 case GL_RGB:
584 case GL_BGR:
585 case GL_RG:
586 case GL_RED:
587 case GL_GREEN:
588 case GL_BLUE:
589 case GL_ALPHA:
590 case GL_INTENSITY:
591 case GL_LUMINANCE:
592 case GL_LUMINANCE_ALPHA:
593
594 case GL_SRGB:
595 case GL_SRGB_ALPHA:
596 case GL_SLUMINANCE:
597 case GL_SLUMINANCE_ALPHA:
598
599 case GL_RGBA_SNORM:
600 case GL_RGB_SNORM:
601 case GL_RG_SNORM:
602 case GL_RED_SNORM:
603 case GL_ALPHA_SNORM:
604 case GL_INTENSITY_SNORM:
605 case GL_LUMINANCE_SNORM:
606 case GL_LUMINANCE_ALPHA_SNORM:
607
608 case GL_RED_INTEGER:
609 case GL_GREEN_INTEGER:
610 case GL_BLUE_INTEGER:
611 case GL_ALPHA_INTEGER:
612 case GL_RGB_INTEGER:
613 case GL_RGBA_INTEGER:
614 case GL_BGR_INTEGER:
615 case GL_BGRA_INTEGER:
616 case GL_RG_INTEGER:
617 case GL_LUMINANCE_INTEGER_EXT:
618 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
619
620 case GL_DEPTH_COMPONENT:
621 case GL_DEPTH_STENCIL:
622 case GL_STENCIL_INDEX:
623 return GL_TRUE;
624 default:
625 return GL_FALSE;
626 }
627 }
628
629 /**
630 * Test if the given format is a UNORM (unsigned-normalized) format.
631 */
632 GLboolean
_mesa_is_enum_format_unorm(GLenum format)633 _mesa_is_enum_format_unorm(GLenum format)
634 {
635 switch(format) {
636 case GL_RED:
637 case GL_GREEN:
638 case GL_BLUE:
639 case GL_ALPHA:
640 case GL_ALPHA4:
641 case GL_ALPHA8:
642 case GL_ALPHA12:
643 case GL_ALPHA16:
644 case 1:
645 case GL_LUMINANCE:
646 case GL_SLUMINANCE:
647 case GL_LUMINANCE4:
648 case GL_LUMINANCE8:
649 case GL_LUMINANCE12:
650 case GL_LUMINANCE16:
651 case 2:
652 case GL_LUMINANCE_ALPHA:
653 case GL_SLUMINANCE_ALPHA:
654 case GL_LUMINANCE4_ALPHA4:
655 case GL_LUMINANCE6_ALPHA2:
656 case GL_LUMINANCE8_ALPHA8:
657 case GL_LUMINANCE12_ALPHA4:
658 case GL_LUMINANCE12_ALPHA12:
659 case GL_LUMINANCE16_ALPHA16:
660 case GL_INTENSITY:
661 case GL_INTENSITY4:
662 case GL_INTENSITY8:
663 case GL_INTENSITY12:
664 case GL_INTENSITY16:
665 case GL_R8:
666 case GL_R16:
667 case GL_RG:
668 case GL_RG8:
669 case GL_RG16:
670 case 3:
671 case GL_RGB:
672 case GL_BGR:
673 case GL_SRGB:
674 case GL_R3_G3_B2:
675 case GL_RGB4:
676 case GL_RGB5:
677 case GL_RGB565:
678 case GL_RGB8:
679 case GL_RGB10:
680 case GL_RGB12:
681 case GL_RGB16:
682 case 4:
683 case GL_ABGR_EXT:
684 case GL_RGBA:
685 case GL_BGRA:
686 case GL_SRGB_ALPHA:
687 case GL_RGBA2:
688 case GL_RGBA4:
689 case GL_RGB5_A1:
690 case GL_RGBA8:
691 case GL_RGB10_A2:
692 case GL_RGBA12:
693 case GL_RGBA16:
694 return GL_TRUE;
695 default:
696 return GL_FALSE;
697 }
698 }
699
700 /**
701 * Test if the given format is a SNORM (signed-normalized) format.
702 */
703 GLboolean
_mesa_is_enum_format_snorm(GLenum format)704 _mesa_is_enum_format_snorm(GLenum format)
705 {
706 switch (format) {
707 /* signed, normalized texture formats */
708 case GL_RED_SNORM:
709 case GL_R8_SNORM:
710 case GL_R16_SNORM:
711 case GL_RG_SNORM:
712 case GL_RG8_SNORM:
713 case GL_RG16_SNORM:
714 case GL_RGB_SNORM:
715 case GL_RGB8_SNORM:
716 case GL_RGB16_SNORM:
717 case GL_RGBA_SNORM:
718 case GL_RGBA8_SNORM:
719 case GL_RGBA16_SNORM:
720 case GL_ALPHA_SNORM:
721 case GL_ALPHA8_SNORM:
722 case GL_ALPHA16_SNORM:
723 case GL_LUMINANCE_SNORM:
724 case GL_LUMINANCE8_SNORM:
725 case GL_LUMINANCE16_SNORM:
726 case GL_LUMINANCE_ALPHA_SNORM:
727 case GL_LUMINANCE8_ALPHA8_SNORM:
728 case GL_LUMINANCE16_ALPHA16_SNORM:
729 case GL_INTENSITY_SNORM:
730 case GL_INTENSITY8_SNORM:
731 case GL_INTENSITY16_SNORM:
732 return GL_TRUE;
733 default:
734 return GL_FALSE;
735 }
736 }
737
738 /**
739 * Test if the given format is an integer (non-normalized) format.
740 */
741 GLboolean
_mesa_is_enum_format_unsigned_int(GLenum format)742 _mesa_is_enum_format_unsigned_int(GLenum format)
743 {
744 switch (format) {
745 /* specific integer formats */
746 case GL_RGBA32UI_EXT:
747 case GL_RGB32UI_EXT:
748 case GL_RG32UI:
749 case GL_R32UI:
750 case GL_ALPHA32UI_EXT:
751 case GL_INTENSITY32UI_EXT:
752 case GL_LUMINANCE32UI_EXT:
753 case GL_LUMINANCE_ALPHA32UI_EXT:
754 case GL_RGBA16UI_EXT:
755 case GL_RGB16UI_EXT:
756 case GL_RG16UI:
757 case GL_R16UI:
758 case GL_ALPHA16UI_EXT:
759 case GL_INTENSITY16UI_EXT:
760 case GL_LUMINANCE16UI_EXT:
761 case GL_LUMINANCE_ALPHA16UI_EXT:
762 case GL_RGBA8UI_EXT:
763 case GL_RGB8UI_EXT:
764 case GL_RG8UI:
765 case GL_R8UI:
766 case GL_ALPHA8UI_EXT:
767 case GL_INTENSITY8UI_EXT:
768 case GL_LUMINANCE8UI_EXT:
769 case GL_LUMINANCE_ALPHA8UI_EXT:
770 case GL_RGB10_A2UI:
771 return GL_TRUE;
772 default:
773 return GL_FALSE;
774 }
775 }
776
777
778 /**
779 * Test if the given format is an integer (non-normalized) format.
780 */
781 GLboolean
_mesa_is_enum_format_signed_int(GLenum format)782 _mesa_is_enum_format_signed_int(GLenum format)
783 {
784 switch (format) {
785 /* generic integer formats */
786 case GL_RED_INTEGER_EXT:
787 case GL_GREEN_INTEGER_EXT:
788 case GL_BLUE_INTEGER_EXT:
789 case GL_ALPHA_INTEGER_EXT:
790 case GL_RGB_INTEGER_EXT:
791 case GL_RGBA_INTEGER_EXT:
792 case GL_BGR_INTEGER_EXT:
793 case GL_BGRA_INTEGER_EXT:
794 case GL_LUMINANCE_INTEGER_EXT:
795 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
796 case GL_RG_INTEGER:
797 /* specific integer formats */
798 case GL_RGBA32I_EXT:
799 case GL_RGB32I_EXT:
800 case GL_RG32I:
801 case GL_R32I:
802 case GL_ALPHA32I_EXT:
803 case GL_INTENSITY32I_EXT:
804 case GL_LUMINANCE32I_EXT:
805 case GL_LUMINANCE_ALPHA32I_EXT:
806 case GL_RGBA16I_EXT:
807 case GL_RGB16I_EXT:
808 case GL_RG16I:
809 case GL_R16I:
810 case GL_ALPHA16I_EXT:
811 case GL_INTENSITY16I_EXT:
812 case GL_LUMINANCE16I_EXT:
813 case GL_LUMINANCE_ALPHA16I_EXT:
814 case GL_RGBA8I_EXT:
815 case GL_RGB8I_EXT:
816 case GL_RG8I:
817 case GL_R8I:
818 case GL_ALPHA8I_EXT:
819 case GL_INTENSITY8I_EXT:
820 case GL_LUMINANCE8I_EXT:
821 case GL_LUMINANCE_ALPHA8I_EXT:
822 return GL_TRUE;
823 default:
824 return GL_FALSE;
825 }
826 }
827
828 /**
829 * Test if the given format is an ASTC 2D format.
830 */
831 static bool
is_astc_2d_format(GLenum internalFormat)832 is_astc_2d_format(GLenum internalFormat)
833 {
834 switch (internalFormat) {
835 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
836 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
837 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
838 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
839 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
840 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
841 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
842 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
843 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
844 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
845 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
846 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
847 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
848 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
849 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
850 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
851 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
852 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
853 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
854 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
855 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
856 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
857 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
858 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
859 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
860 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
861 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
862 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
863 return true;
864 default:
865 return false;
866 }
867 }
868
869 /**
870 * Test if the given format is an ASTC 3D format.
871 */
872 static bool
is_astc_3d_format(GLenum internalFormat)873 is_astc_3d_format(GLenum internalFormat)
874 {
875 switch (internalFormat) {
876 case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
877 case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
878 case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
879 case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
880 case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
881 case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
882 case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
883 case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
884 case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
885 case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
886 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
887 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
888 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
889 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
890 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
891 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
892 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
893 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
894 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
895 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
896 return true;
897 default:
898 return false;
899 }
900 }
901
902 /**
903 * Test if the given format is an ASTC format.
904 */
905 GLboolean
_mesa_is_astc_format(GLenum internalFormat)906 _mesa_is_astc_format(GLenum internalFormat)
907 {
908 return is_astc_2d_format(internalFormat) ||
909 is_astc_3d_format(internalFormat);
910 }
911
912 /**
913 * Test if the given format is an ETC2 format.
914 */
915 GLboolean
_mesa_is_etc2_format(GLenum internalFormat)916 _mesa_is_etc2_format(GLenum internalFormat)
917 {
918 switch (internalFormat) {
919 case GL_COMPRESSED_RGB8_ETC2:
920 case GL_COMPRESSED_SRGB8_ETC2:
921 case GL_COMPRESSED_RGBA8_ETC2_EAC:
922 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
923 case GL_COMPRESSED_R11_EAC:
924 case GL_COMPRESSED_RG11_EAC:
925 case GL_COMPRESSED_SIGNED_R11_EAC:
926 case GL_COMPRESSED_SIGNED_RG11_EAC:
927 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
928 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
929 return true;
930 default:
931 return false;
932 }
933 }
934
935 /**
936 * Test if the given format is an integer (non-normalized) format.
937 */
938 GLboolean
_mesa_is_enum_format_integer(GLenum format)939 _mesa_is_enum_format_integer(GLenum format)
940 {
941 return _mesa_is_enum_format_unsigned_int(format) ||
942 _mesa_is_enum_format_signed_int(format);
943 }
944
945
946 GLboolean
_mesa_is_type_unsigned(GLenum type)947 _mesa_is_type_unsigned(GLenum type)
948 {
949 switch (type) {
950 case GL_UNSIGNED_INT:
951 case GL_UNSIGNED_INT_8_8_8_8:
952 case GL_UNSIGNED_INT_8_8_8_8_REV:
953 case GL_UNSIGNED_INT_10_10_10_2:
954 case GL_UNSIGNED_INT_2_10_10_10_REV:
955
956 case GL_UNSIGNED_SHORT:
957 case GL_UNSIGNED_SHORT_4_4_4_4:
958 case GL_UNSIGNED_SHORT_5_5_5_1:
959 case GL_UNSIGNED_SHORT_5_6_5:
960 case GL_UNSIGNED_SHORT_5_6_5_REV:
961 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
962 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
963 case GL_UNSIGNED_SHORT_8_8_MESA:
964 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
965
966 case GL_UNSIGNED_BYTE:
967 case GL_UNSIGNED_BYTE_3_3_2:
968 case GL_UNSIGNED_BYTE_2_3_3_REV:
969 return GL_TRUE;
970
971 default:
972 return GL_FALSE;
973 }
974 }
975
976
977 /**
978 * Test if the given image format is a color/RGBA format (i.e., not color
979 * index, depth, stencil, etc).
980 * \param format the image format value (may by an internal texture format)
981 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
982 */
983 GLboolean
_mesa_is_color_format(GLenum format)984 _mesa_is_color_format(GLenum format)
985 {
986 switch (format) {
987 case GL_RED:
988 case GL_GREEN:
989 case GL_BLUE:
990 case GL_ALPHA:
991 case GL_ALPHA4:
992 case GL_ALPHA8:
993 case GL_ALPHA12:
994 case GL_ALPHA16:
995 case 1:
996 case GL_LUMINANCE:
997 case GL_LUMINANCE4:
998 case GL_LUMINANCE8:
999 case GL_LUMINANCE12:
1000 case GL_LUMINANCE16:
1001 case 2:
1002 case GL_LUMINANCE_ALPHA:
1003 case GL_LUMINANCE4_ALPHA4:
1004 case GL_LUMINANCE6_ALPHA2:
1005 case GL_LUMINANCE8_ALPHA8:
1006 case GL_LUMINANCE12_ALPHA4:
1007 case GL_LUMINANCE12_ALPHA12:
1008 case GL_LUMINANCE16_ALPHA16:
1009 case GL_INTENSITY:
1010 case GL_INTENSITY4:
1011 case GL_INTENSITY8:
1012 case GL_INTENSITY12:
1013 case GL_INTENSITY16:
1014 case GL_R8:
1015 case GL_R16:
1016 case GL_RG:
1017 case GL_RG8:
1018 case GL_RG16:
1019 case 3:
1020 case GL_RGB:
1021 case GL_BGR:
1022 case GL_R3_G3_B2:
1023 case GL_RGB4:
1024 case GL_RGB5:
1025 case GL_RGB565:
1026 case GL_RGB8:
1027 case GL_RGB10:
1028 case GL_RGB12:
1029 case GL_RGB16:
1030 case 4:
1031 case GL_ABGR_EXT:
1032 case GL_RGBA:
1033 case GL_BGRA:
1034 case GL_RGBA2:
1035 case GL_RGBA4:
1036 case GL_RGB5_A1:
1037 case GL_RGBA8:
1038 case GL_RGB10_A2:
1039 case GL_RGBA12:
1040 case GL_RGBA16:
1041 /* float texture formats */
1042 case GL_ALPHA16F_ARB:
1043 case GL_ALPHA32F_ARB:
1044 case GL_LUMINANCE16F_ARB:
1045 case GL_LUMINANCE32F_ARB:
1046 case GL_LUMINANCE_ALPHA16F_ARB:
1047 case GL_LUMINANCE_ALPHA32F_ARB:
1048 case GL_INTENSITY16F_ARB:
1049 case GL_INTENSITY32F_ARB:
1050 case GL_R16F:
1051 case GL_R32F:
1052 case GL_RG16F:
1053 case GL_RG32F:
1054 case GL_RGB16F_ARB:
1055 case GL_RGB32F_ARB:
1056 case GL_RGBA16F_ARB:
1057 case GL_RGBA32F_ARB:
1058 /* compressed formats */
1059 case GL_COMPRESSED_ALPHA:
1060 case GL_COMPRESSED_LUMINANCE:
1061 case GL_COMPRESSED_LUMINANCE_ALPHA:
1062 case GL_COMPRESSED_INTENSITY:
1063 case GL_COMPRESSED_RED:
1064 case GL_COMPRESSED_RG:
1065 case GL_COMPRESSED_RGB:
1066 case GL_COMPRESSED_RGBA:
1067 case GL_RGB_S3TC:
1068 case GL_RGB4_S3TC:
1069 case GL_RGBA_S3TC:
1070 case GL_RGBA4_S3TC:
1071 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
1072 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
1073 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
1074 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
1075 case GL_COMPRESSED_RGB_FXT1_3DFX:
1076 case GL_COMPRESSED_RGBA_FXT1_3DFX:
1077 case GL_SR8_EXT:
1078 case GL_SRG8_EXT:
1079 case GL_SRGB_EXT:
1080 case GL_SRGB8_EXT:
1081 case GL_SRGB_ALPHA_EXT:
1082 case GL_SRGB8_ALPHA8_EXT:
1083 case GL_SLUMINANCE_ALPHA_EXT:
1084 case GL_SLUMINANCE8_ALPHA8_EXT:
1085 case GL_SLUMINANCE_EXT:
1086 case GL_SLUMINANCE8_EXT:
1087 case GL_COMPRESSED_SRGB_EXT:
1088 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1089 case GL_COMPRESSED_SRGB_ALPHA_EXT:
1090 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1091 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1092 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1093 case GL_COMPRESSED_SLUMINANCE_EXT:
1094 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
1095 case GL_COMPRESSED_RED_RGTC1:
1096 case GL_COMPRESSED_SIGNED_RED_RGTC1:
1097 case GL_COMPRESSED_RG_RGTC2:
1098 case GL_COMPRESSED_SIGNED_RG_RGTC2:
1099 case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1100 case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1101 case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1102 case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1103 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1104 case GL_ETC1_RGB8_OES:
1105 case GL_COMPRESSED_RGB8_ETC2:
1106 case GL_COMPRESSED_SRGB8_ETC2:
1107 case GL_COMPRESSED_RGBA8_ETC2_EAC:
1108 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1109 case GL_COMPRESSED_R11_EAC:
1110 case GL_COMPRESSED_RG11_EAC:
1111 case GL_COMPRESSED_SIGNED_R11_EAC:
1112 case GL_COMPRESSED_SIGNED_RG11_EAC:
1113 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1114 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1115 case GL_COMPRESSED_RGBA_BPTC_UNORM:
1116 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1117 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
1118 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
1119 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
1120 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
1121 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
1122 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
1123 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
1124 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
1125 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
1126 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
1127 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
1128 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
1129 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
1130 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
1131 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
1132 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
1133 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1134 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1135 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1136 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1137 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1138 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1139 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1140 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1141 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1142 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1143 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1144 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1145 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1146 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1147 case GL_ATC_RGB_AMD:
1148 case GL_ATC_RGBA_EXPLICIT_ALPHA_AMD:
1149 case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
1150 /* generic integer formats */
1151 case GL_RED_INTEGER_EXT:
1152 case GL_GREEN_INTEGER_EXT:
1153 case GL_BLUE_INTEGER_EXT:
1154 case GL_ALPHA_INTEGER_EXT:
1155 case GL_RGB_INTEGER_EXT:
1156 case GL_RGBA_INTEGER_EXT:
1157 case GL_BGR_INTEGER_EXT:
1158 case GL_BGRA_INTEGER_EXT:
1159 case GL_RG_INTEGER:
1160 case GL_LUMINANCE_INTEGER_EXT:
1161 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1162 /* sized integer formats */
1163 case GL_RGBA32UI_EXT:
1164 case GL_RGB32UI_EXT:
1165 case GL_RG32UI:
1166 case GL_R32UI:
1167 case GL_ALPHA32UI_EXT:
1168 case GL_INTENSITY32UI_EXT:
1169 case GL_LUMINANCE32UI_EXT:
1170 case GL_LUMINANCE_ALPHA32UI_EXT:
1171 case GL_RGBA16UI_EXT:
1172 case GL_RGB16UI_EXT:
1173 case GL_RG16UI:
1174 case GL_R16UI:
1175 case GL_ALPHA16UI_EXT:
1176 case GL_INTENSITY16UI_EXT:
1177 case GL_LUMINANCE16UI_EXT:
1178 case GL_LUMINANCE_ALPHA16UI_EXT:
1179 case GL_RGBA8UI_EXT:
1180 case GL_RGB8UI_EXT:
1181 case GL_RG8UI:
1182 case GL_R8UI:
1183 case GL_ALPHA8UI_EXT:
1184 case GL_INTENSITY8UI_EXT:
1185 case GL_LUMINANCE8UI_EXT:
1186 case GL_LUMINANCE_ALPHA8UI_EXT:
1187 case GL_RGBA32I_EXT:
1188 case GL_RGB32I_EXT:
1189 case GL_RG32I:
1190 case GL_R32I:
1191 case GL_ALPHA32I_EXT:
1192 case GL_INTENSITY32I_EXT:
1193 case GL_LUMINANCE32I_EXT:
1194 case GL_LUMINANCE_ALPHA32I_EXT:
1195 case GL_RGBA16I_EXT:
1196 case GL_RGB16I_EXT:
1197 case GL_RG16I:
1198 case GL_R16I:
1199 case GL_ALPHA16I_EXT:
1200 case GL_INTENSITY16I_EXT:
1201 case GL_LUMINANCE16I_EXT:
1202 case GL_LUMINANCE_ALPHA16I_EXT:
1203 case GL_RGBA8I_EXT:
1204 case GL_RGB8I_EXT:
1205 case GL_RG8I:
1206 case GL_R8I:
1207 case GL_ALPHA8I_EXT:
1208 case GL_INTENSITY8I_EXT:
1209 case GL_LUMINANCE8I_EXT:
1210 case GL_LUMINANCE_ALPHA8I_EXT:
1211 /* signed, normalized texture formats */
1212 case GL_RED_SNORM:
1213 case GL_R8_SNORM:
1214 case GL_R16_SNORM:
1215 case GL_RG_SNORM:
1216 case GL_RG8_SNORM:
1217 case GL_RG16_SNORM:
1218 case GL_RGB_SNORM:
1219 case GL_RGB8_SNORM:
1220 case GL_RGB16_SNORM:
1221 case GL_RGBA_SNORM:
1222 case GL_RGBA8_SNORM:
1223 case GL_RGBA16_SNORM:
1224 case GL_ALPHA_SNORM:
1225 case GL_ALPHA8_SNORM:
1226 case GL_ALPHA16_SNORM:
1227 case GL_LUMINANCE_SNORM:
1228 case GL_LUMINANCE8_SNORM:
1229 case GL_LUMINANCE16_SNORM:
1230 case GL_LUMINANCE_ALPHA_SNORM:
1231 case GL_LUMINANCE8_ALPHA8_SNORM:
1232 case GL_LUMINANCE16_ALPHA16_SNORM:
1233 case GL_INTENSITY_SNORM:
1234 case GL_INTENSITY8_SNORM:
1235 case GL_INTENSITY16_SNORM:
1236 case GL_RGB9_E5:
1237 case GL_R11F_G11F_B10F:
1238 case GL_RGB10_A2UI:
1239 return GL_TRUE;
1240 case GL_YCBCR_MESA: /* not considered to be RGB */
1241 FALLTHROUGH;
1242 default:
1243 return GL_FALSE;
1244 }
1245 }
1246
1247
1248 /**
1249 * Test if the given image format is a depth component format.
1250 */
1251 GLboolean
_mesa_is_depth_format(GLenum format)1252 _mesa_is_depth_format(GLenum format)
1253 {
1254 switch (format) {
1255 case GL_DEPTH_COMPONENT:
1256 case GL_DEPTH_COMPONENT16:
1257 case GL_DEPTH_COMPONENT24:
1258 case GL_DEPTH_COMPONENT32:
1259 case GL_DEPTH_COMPONENT32F:
1260 return GL_TRUE;
1261 default:
1262 return GL_FALSE;
1263 }
1264 }
1265
1266
1267 /**
1268 * Test if the given image format is a stencil format.
1269 */
1270 GLboolean
_mesa_is_stencil_format(GLenum format)1271 _mesa_is_stencil_format(GLenum format)
1272 {
1273 switch (format) {
1274 case GL_STENCIL_INDEX:
1275 return GL_TRUE;
1276 default:
1277 return GL_FALSE;
1278 }
1279 }
1280
1281
1282 /**
1283 * Test if the given image format is a YCbCr format.
1284 */
1285 GLboolean
_mesa_is_ycbcr_format(GLenum format)1286 _mesa_is_ycbcr_format(GLenum format)
1287 {
1288 switch (format) {
1289 case GL_YCBCR_MESA:
1290 return GL_TRUE;
1291 default:
1292 return GL_FALSE;
1293 }
1294 }
1295
1296
1297 /**
1298 * Test if the given image format is a depth+stencil format.
1299 */
1300 GLboolean
_mesa_is_depthstencil_format(GLenum format)1301 _mesa_is_depthstencil_format(GLenum format)
1302 {
1303 switch (format) {
1304 case GL_DEPTH24_STENCIL8_EXT:
1305 case GL_DEPTH_STENCIL_EXT:
1306 case GL_DEPTH32F_STENCIL8:
1307 return GL_TRUE;
1308 default:
1309 return GL_FALSE;
1310 }
1311 }
1312
1313
1314 /**
1315 * Test if the given image format is a depth or stencil format.
1316 */
1317 GLboolean
_mesa_is_depth_or_stencil_format(GLenum format)1318 _mesa_is_depth_or_stencil_format(GLenum format)
1319 {
1320 switch (format) {
1321 case GL_DEPTH_COMPONENT:
1322 case GL_DEPTH_COMPONENT16:
1323 case GL_DEPTH_COMPONENT24:
1324 case GL_DEPTH_COMPONENT32:
1325 case GL_STENCIL_INDEX:
1326 case GL_STENCIL_INDEX1_EXT:
1327 case GL_STENCIL_INDEX4_EXT:
1328 case GL_STENCIL_INDEX8_EXT:
1329 case GL_STENCIL_INDEX16_EXT:
1330 case GL_DEPTH_STENCIL_EXT:
1331 case GL_DEPTH24_STENCIL8_EXT:
1332 case GL_DEPTH_COMPONENT32F:
1333 case GL_DEPTH32F_STENCIL8:
1334 return GL_TRUE;
1335 default:
1336 return GL_FALSE;
1337 }
1338 }
1339
1340 /**
1341 * Test if the given image format has a floating-point depth component.
1342 */
1343 GLboolean
_mesa_has_depth_float_channel(GLenum internalFormat)1344 _mesa_has_depth_float_channel(GLenum internalFormat)
1345 {
1346 return internalFormat == GL_DEPTH32F_STENCIL8 ||
1347 internalFormat == GL_DEPTH_COMPONENT32F;
1348 }
1349
1350 /**
1351 * Test if an image format is a supported compressed format.
1352 * \param format the internal format token provided by the user.
1353 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
1354 */
1355 GLboolean
_mesa_is_compressed_format(const struct gl_context * ctx,GLenum format)1356 _mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
1357 {
1358 mesa_format m_format = _mesa_glenum_to_compressed_format(format);
1359
1360 /* Some formats in this switch have an equivalent mesa_format_layout
1361 * to the compressed formats in the layout switch below and thus
1362 * must be handled first.
1363 */
1364 switch (format) {
1365 case GL_RGB_S3TC:
1366 case GL_RGB4_S3TC:
1367 case GL_RGBA_S3TC:
1368 case GL_RGBA4_S3TC:
1369 return _mesa_has_S3_s3tc(ctx);
1370 case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1371 return _mesa_has_ATI_texture_compression_3dc(ctx);
1372 case GL_PALETTE4_RGB8_OES:
1373 case GL_PALETTE4_RGBA8_OES:
1374 case GL_PALETTE4_R5_G6_B5_OES:
1375 case GL_PALETTE4_RGBA4_OES:
1376 case GL_PALETTE4_RGB5_A1_OES:
1377 case GL_PALETTE8_RGB8_OES:
1378 case GL_PALETTE8_RGBA8_OES:
1379 case GL_PALETTE8_R5_G6_B5_OES:
1380 case GL_PALETTE8_RGBA4_OES:
1381 case GL_PALETTE8_RGB5_A1_OES:
1382 return ctx->API == API_OPENGLES;
1383 }
1384
1385 switch (_mesa_get_format_layout(m_format)) {
1386 case MESA_FORMAT_LAYOUT_S3TC:
1387 if (!_mesa_is_format_srgb(m_format)) {
1388 return _mesa_has_EXT_texture_compression_s3tc(ctx);
1389 } else {
1390 return (_mesa_has_EXT_texture_sRGB(ctx) ||
1391 _mesa_has_EXT_texture_compression_s3tc_srgb(ctx)) &&
1392 _mesa_has_EXT_texture_compression_s3tc(ctx);
1393 }
1394 case MESA_FORMAT_LAYOUT_FXT1:
1395 return _mesa_has_3DFX_texture_compression_FXT1(ctx);
1396 case MESA_FORMAT_LAYOUT_RGTC:
1397 return _mesa_has_ARB_texture_compression_rgtc(ctx) ||
1398 _mesa_has_EXT_texture_compression_rgtc(ctx);
1399 case MESA_FORMAT_LAYOUT_LATC:
1400 return _mesa_has_EXT_texture_compression_latc(ctx);
1401 case MESA_FORMAT_LAYOUT_ETC1:
1402 return _mesa_has_OES_compressed_ETC1_RGB8_texture(ctx);
1403 case MESA_FORMAT_LAYOUT_ETC2:
1404 return _mesa_is_gles3(ctx) || _mesa_has_ARB_ES3_compatibility(ctx);
1405 case MESA_FORMAT_LAYOUT_BPTC:
1406 return _mesa_has_ARB_texture_compression_bptc(ctx) ||
1407 _mesa_has_EXT_texture_compression_bptc(ctx);
1408 case MESA_FORMAT_LAYOUT_ASTC:
1409 return _mesa_has_KHR_texture_compression_astc_ldr(ctx);
1410 case MESA_FORMAT_LAYOUT_ATC:
1411 return _mesa_has_AMD_compressed_ATC_texture(ctx);
1412 default:
1413 return GL_FALSE;
1414 }
1415 }
1416
1417 /**
1418 * Test if the given format represents an sRGB format.
1419 * \param format the GL format (can be an internal format)
1420 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
1421 */
1422 GLboolean
_mesa_is_srgb_format(GLenum format)1423 _mesa_is_srgb_format(GLenum format)
1424 {
1425 switch (format) {
1426 case GL_SR8_EXT:
1427 case GL_SRG8_EXT:
1428 case GL_SRGB:
1429 case GL_SRGB8:
1430 case GL_SRGB_ALPHA:
1431 case GL_SRGB8_ALPHA8:
1432 case GL_COMPRESSED_SRGB:
1433 case GL_COMPRESSED_SRGB_ALPHA:
1434 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
1435 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
1436 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
1437 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
1438 case GL_COMPRESSED_SRGB8_ETC2:
1439 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
1440 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
1441 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
1442 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
1443 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
1444 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
1445 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
1446 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
1447 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
1448 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
1449 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
1450 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
1451 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
1452 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
1453 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
1454 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
1455 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
1456 return GL_TRUE;
1457 default:
1458 break;
1459 }
1460
1461 return GL_FALSE;
1462 }
1463
1464 /**
1465 * Convert various unpack formats to the corresponding base format.
1466 */
1467 GLenum
_mesa_unpack_format_to_base_format(GLenum format)1468 _mesa_unpack_format_to_base_format(GLenum format)
1469 {
1470 switch(format) {
1471 case GL_RED_INTEGER:
1472 return GL_RED;
1473 case GL_GREEN_INTEGER:
1474 return GL_GREEN;
1475 case GL_BLUE_INTEGER:
1476 return GL_BLUE;
1477 case GL_ALPHA_INTEGER:
1478 return GL_ALPHA;
1479 case GL_RG_INTEGER:
1480 return GL_RG;
1481 case GL_RGB_INTEGER:
1482 return GL_RGB;
1483 case GL_RGBA_INTEGER:
1484 return GL_RGBA;
1485 case GL_BGR_INTEGER:
1486 return GL_BGR;
1487 case GL_BGRA_INTEGER:
1488 return GL_BGRA;
1489 case GL_LUMINANCE_INTEGER_EXT:
1490 return GL_LUMINANCE;
1491 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1492 return GL_LUMINANCE_ALPHA;
1493 case GL_RED:
1494 case GL_GREEN:
1495 case GL_BLUE:
1496 case GL_RG:
1497 case GL_RGB:
1498 case GL_RGBA:
1499 case GL_BGR:
1500 case GL_BGRA:
1501 case GL_ALPHA:
1502 case GL_LUMINANCE:
1503 case GL_LUMINANCE_ALPHA:
1504 default:
1505 return format;
1506 }
1507 }
1508
1509 /**
1510 * Convert various base formats to the corresponding integer format.
1511 */
1512 GLenum
_mesa_base_format_to_integer_format(GLenum format)1513 _mesa_base_format_to_integer_format(GLenum format)
1514 {
1515 switch(format) {
1516 case GL_RED:
1517 return GL_RED_INTEGER;
1518 case GL_GREEN:
1519 return GL_GREEN_INTEGER;
1520 case GL_BLUE:
1521 return GL_BLUE_INTEGER;
1522 case GL_RG:
1523 return GL_RG_INTEGER;
1524 case GL_RGB:
1525 return GL_RGB_INTEGER;
1526 case GL_RGBA:
1527 return GL_RGBA_INTEGER;
1528 case GL_BGR:
1529 return GL_BGR_INTEGER;
1530 case GL_BGRA:
1531 return GL_BGRA_INTEGER;
1532 case GL_ALPHA:
1533 return GL_ALPHA_INTEGER;
1534 case GL_LUMINANCE:
1535 return GL_LUMINANCE_INTEGER_EXT;
1536 case GL_LUMINANCE_ALPHA:
1537 return GL_LUMINANCE_ALPHA_INTEGER_EXT;
1538 }
1539
1540 return format;
1541 }
1542
1543
1544 /**
1545 * Does the given base texture/renderbuffer format have the channel
1546 * named by 'pname'?
1547 */
1548 GLboolean
_mesa_base_format_has_channel(GLenum base_format,GLenum pname)1549 _mesa_base_format_has_channel(GLenum base_format, GLenum pname)
1550 {
1551 switch (pname) {
1552 case GL_TEXTURE_RED_SIZE:
1553 case GL_TEXTURE_RED_TYPE:
1554 case GL_RENDERBUFFER_RED_SIZE_EXT:
1555 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
1556 case GL_INTERNALFORMAT_RED_SIZE:
1557 case GL_INTERNALFORMAT_RED_TYPE:
1558 if (base_format == GL_RED ||
1559 base_format == GL_RG ||
1560 base_format == GL_RGB ||
1561 base_format == GL_RGBA) {
1562 return GL_TRUE;
1563 }
1564 return GL_FALSE;
1565 case GL_TEXTURE_GREEN_SIZE:
1566 case GL_TEXTURE_GREEN_TYPE:
1567 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
1568 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
1569 case GL_INTERNALFORMAT_GREEN_SIZE:
1570 case GL_INTERNALFORMAT_GREEN_TYPE:
1571 if (base_format == GL_RG ||
1572 base_format == GL_RGB ||
1573 base_format == GL_RGBA) {
1574 return GL_TRUE;
1575 }
1576 return GL_FALSE;
1577 case GL_TEXTURE_BLUE_SIZE:
1578 case GL_TEXTURE_BLUE_TYPE:
1579 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
1580 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
1581 case GL_INTERNALFORMAT_BLUE_SIZE:
1582 case GL_INTERNALFORMAT_BLUE_TYPE:
1583 if (base_format == GL_RGB ||
1584 base_format == GL_RGBA) {
1585 return GL_TRUE;
1586 }
1587 return GL_FALSE;
1588 case GL_TEXTURE_ALPHA_SIZE:
1589 case GL_TEXTURE_ALPHA_TYPE:
1590 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
1591 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
1592 case GL_INTERNALFORMAT_ALPHA_SIZE:
1593 case GL_INTERNALFORMAT_ALPHA_TYPE:
1594 if (base_format == GL_RGBA ||
1595 base_format == GL_ALPHA ||
1596 base_format == GL_LUMINANCE_ALPHA) {
1597 return GL_TRUE;
1598 }
1599 return GL_FALSE;
1600 case GL_TEXTURE_LUMINANCE_SIZE:
1601 case GL_TEXTURE_LUMINANCE_TYPE:
1602 if (base_format == GL_LUMINANCE ||
1603 base_format == GL_LUMINANCE_ALPHA) {
1604 return GL_TRUE;
1605 }
1606 return GL_FALSE;
1607 case GL_TEXTURE_INTENSITY_SIZE:
1608 case GL_TEXTURE_INTENSITY_TYPE:
1609 if (base_format == GL_INTENSITY) {
1610 return GL_TRUE;
1611 }
1612 return GL_FALSE;
1613 case GL_TEXTURE_DEPTH_SIZE:
1614 case GL_TEXTURE_DEPTH_TYPE:
1615 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
1616 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
1617 case GL_INTERNALFORMAT_DEPTH_SIZE:
1618 case GL_INTERNALFORMAT_DEPTH_TYPE:
1619 if (base_format == GL_DEPTH_STENCIL ||
1620 base_format == GL_DEPTH_COMPONENT) {
1621 return GL_TRUE;
1622 }
1623 return GL_FALSE;
1624 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
1625 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
1626 case GL_INTERNALFORMAT_STENCIL_SIZE:
1627 case GL_INTERNALFORMAT_STENCIL_TYPE:
1628 if (base_format == GL_DEPTH_STENCIL ||
1629 base_format == GL_STENCIL_INDEX) {
1630 return GL_TRUE;
1631 }
1632 return GL_FALSE;
1633 default:
1634 _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
1635 __func__, pname);
1636 return GL_FALSE;
1637 }
1638
1639 return GL_FALSE;
1640 }
1641
1642
1643 /**
1644 * If format is a generic compressed format, return the corresponding
1645 * non-compressed format. For other formats, return the format as-is.
1646 */
1647 GLenum
_mesa_generic_compressed_format_to_uncompressed_format(GLenum format)1648 _mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
1649 {
1650 switch (format) {
1651 case GL_COMPRESSED_RED:
1652 return GL_RED;
1653 case GL_COMPRESSED_RG:
1654 return GL_RG;
1655 case GL_COMPRESSED_RGB:
1656 return GL_RGB;
1657 case GL_COMPRESSED_RGBA:
1658 return GL_RGBA;
1659 case GL_COMPRESSED_ALPHA:
1660 return GL_ALPHA;
1661 case GL_COMPRESSED_LUMINANCE:
1662 return GL_LUMINANCE;
1663 case GL_COMPRESSED_LUMINANCE_ALPHA:
1664 return GL_LUMINANCE_ALPHA;
1665 case GL_COMPRESSED_INTENSITY:
1666 return GL_INTENSITY;
1667 /* sRGB formats */
1668 case GL_COMPRESSED_SRGB:
1669 return GL_SRGB;
1670 case GL_COMPRESSED_SRGB_ALPHA:
1671 return GL_SRGB_ALPHA;
1672 case GL_COMPRESSED_SLUMINANCE:
1673 return GL_SLUMINANCE;
1674 case GL_COMPRESSED_SLUMINANCE_ALPHA:
1675 return GL_SLUMINANCE_ALPHA;
1676 default:
1677 return format;
1678 }
1679 }
1680
1681
1682 /**
1683 * Return the equivalent non-generic internal format.
1684 * This is useful for comparing whether two internal formats are equivalent.
1685 */
1686 GLenum
_mesa_get_nongeneric_internalformat(GLenum format)1687 _mesa_get_nongeneric_internalformat(GLenum format)
1688 {
1689 switch (format) {
1690 /* GL 1.1 formats. */
1691 case 4:
1692 case GL_RGBA:
1693 return GL_RGBA8;
1694 case 3:
1695 case GL_RGB:
1696 return GL_RGB8;
1697 case 2:
1698 case GL_LUMINANCE_ALPHA:
1699 return GL_LUMINANCE8_ALPHA8;
1700 case 1:
1701 case GL_LUMINANCE:
1702 return GL_LUMINANCE8;
1703 case GL_ALPHA:
1704 return GL_ALPHA8;
1705 case GL_INTENSITY:
1706 return GL_INTENSITY8;
1707
1708 /* GL_ARB_texture_rg */
1709 case GL_RED:
1710 return GL_R8;
1711 case GL_RG:
1712 return GL_RG8;
1713
1714 /* GL_EXT_texture_sRGB */
1715 case GL_SRGB:
1716 return GL_SRGB8;
1717 case GL_SRGB_ALPHA:
1718 return GL_SRGB8_ALPHA8;
1719 case GL_SLUMINANCE:
1720 return GL_SLUMINANCE8;
1721 case GL_SLUMINANCE_ALPHA:
1722 return GL_SLUMINANCE8_ALPHA8;
1723
1724 /* GL_EXT_texture_snorm */
1725 case GL_RGBA_SNORM:
1726 return GL_RGBA8_SNORM;
1727 case GL_RGB_SNORM:
1728 return GL_RGB8_SNORM;
1729 case GL_RG_SNORM:
1730 return GL_RG8_SNORM;
1731 case GL_RED_SNORM:
1732 return GL_R8_SNORM;
1733 case GL_LUMINANCE_ALPHA_SNORM:
1734 return GL_LUMINANCE8_ALPHA8_SNORM;
1735 case GL_LUMINANCE_SNORM:
1736 return GL_LUMINANCE8_SNORM;
1737 case GL_ALPHA_SNORM:
1738 return GL_ALPHA8_SNORM;
1739 case GL_INTENSITY_SNORM:
1740 return GL_INTENSITY8_SNORM;
1741
1742 default:
1743 return format;
1744 }
1745 }
1746
1747
1748 /**
1749 * Convert an sRGB internal format to linear.
1750 */
1751 GLenum
_mesa_get_linear_internalformat(GLenum format)1752 _mesa_get_linear_internalformat(GLenum format)
1753 {
1754 switch (format) {
1755 case GL_SRGB:
1756 return GL_RGB;
1757 case GL_SRGB_ALPHA:
1758 return GL_RGBA;
1759 case GL_SRGB8:
1760 return GL_RGB8;
1761 case GL_SRGB8_ALPHA8:
1762 return GL_RGBA8;
1763 case GL_SLUMINANCE8:
1764 return GL_LUMINANCE8;
1765 case GL_SLUMINANCE:
1766 return GL_LUMINANCE;
1767 case GL_SLUMINANCE_ALPHA:
1768 return GL_LUMINANCE_ALPHA;
1769 case GL_SLUMINANCE8_ALPHA8:
1770 return GL_LUMINANCE8_ALPHA8;
1771 default:
1772 return format;
1773 }
1774 }
1775
1776
1777 /**
1778 * Do error checking of format/type combinations for glReadPixels,
1779 * glDrawPixels and glTex[Sub]Image. Note that depending on the format
1780 * and type values, we may either generate GL_INVALID_OPERATION or
1781 * GL_INVALID_ENUM.
1782 *
1783 * \param format pixel format.
1784 * \param type pixel type.
1785 *
1786 * \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
1787 */
1788 GLenum
_mesa_error_check_format_and_type(const struct gl_context * ctx,GLenum format,GLenum type)1789 _mesa_error_check_format_and_type(const struct gl_context *ctx,
1790 GLenum format, GLenum type)
1791 {
1792 /* From OpenGL 3.3 spec, page 220:
1793 * "If the format is DEPTH_STENCIL, then values are taken from
1794 * both the depth buffer and the stencil buffer. If there is no
1795 * depth buffer or if there is no stencil buffer, then the error
1796 * INVALID_OPERATION occurs. If the type parameter is not
1797 * UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
1798 * error INVALID_ENUM occurs."
1799 *
1800 * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
1801 * cannot be used to read depth or stencil in that API.
1802 */
1803 if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
1804 && type != GL_UNSIGNED_INT_24_8
1805 && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
1806 return GL_INVALID_ENUM;
1807
1808 /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
1809 switch (type) {
1810 case GL_BITMAP:
1811 if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
1812 return GL_INVALID_ENUM;
1813 }
1814 break;
1815
1816 case GL_UNSIGNED_BYTE_3_3_2:
1817 case GL_UNSIGNED_BYTE_2_3_3_REV:
1818 case GL_UNSIGNED_SHORT_5_6_5:
1819 case GL_UNSIGNED_SHORT_5_6_5_REV:
1820 if (format == GL_RGB) {
1821 break; /* OK */
1822 }
1823 if (format == GL_RGB_INTEGER_EXT &&
1824 _mesa_has_texture_rgb10_a2ui(ctx)) {
1825 break; /* OK */
1826 }
1827 return GL_INVALID_OPERATION;
1828
1829 case GL_UNSIGNED_SHORT_4_4_4_4:
1830 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
1831 case GL_UNSIGNED_INT_8_8_8_8:
1832 case GL_UNSIGNED_INT_8_8_8_8_REV:
1833 if (format == GL_RGBA ||
1834 format == GL_BGRA ||
1835 format == GL_ABGR_EXT) {
1836 break; /* OK */
1837 }
1838 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1839 _mesa_has_texture_rgb10_a2ui(ctx)) {
1840 break; /* OK */
1841 }
1842 return GL_INVALID_OPERATION;
1843
1844 case GL_UNSIGNED_SHORT_5_5_5_1:
1845 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
1846 case GL_UNSIGNED_INT_10_10_10_2:
1847 case GL_UNSIGNED_INT_2_10_10_10_REV:
1848 if (format == GL_RGBA ||
1849 format == GL_BGRA) {
1850 break; /* OK */
1851 }
1852 if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
1853 _mesa_has_texture_rgb10_a2ui(ctx)) {
1854 break; /* OK */
1855 }
1856 if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
1857 ctx->API == API_OPENGLES2) {
1858 break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1859 }
1860 return GL_INVALID_OPERATION;
1861
1862 case GL_UNSIGNED_INT_24_8:
1863 /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
1864 if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
1865 return GL_NO_ERROR;
1866
1867 if (format != GL_DEPTH_STENCIL) {
1868 return GL_INVALID_OPERATION;
1869 }
1870 return GL_NO_ERROR;
1871
1872 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
1873 if (!_mesa_has_float_depth_buffer(ctx)) {
1874 return GL_INVALID_ENUM;
1875 }
1876 if (format != GL_DEPTH_STENCIL) {
1877 return GL_INVALID_OPERATION;
1878 }
1879 return GL_NO_ERROR;
1880
1881 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1882 if (!_mesa_has_packed_float(ctx)) {
1883 return GL_INVALID_ENUM;
1884 }
1885 if (format != GL_RGB) {
1886 return GL_INVALID_OPERATION;
1887 }
1888 return GL_NO_ERROR;
1889
1890 case GL_HALF_FLOAT_OES:
1891 switch (format) {
1892 case GL_RGBA:
1893 case GL_RGB:
1894 case GL_LUMINANCE_ALPHA:
1895 case GL_LUMINANCE:
1896 case GL_ALPHA:
1897 return GL_NO_ERROR;
1898 case GL_RG:
1899 case GL_RED:
1900 if (_mesa_has_rg_textures(ctx))
1901 return GL_NO_ERROR;
1902 FALLTHROUGH;
1903 default:
1904 return GL_INVALID_OPERATION;
1905 }
1906
1907 default:
1908 ; /* fall-through */
1909 }
1910
1911 /* now, for each format, check the type for compatibility */
1912 switch (format) {
1913 case GL_COLOR_INDEX:
1914 case GL_STENCIL_INDEX:
1915 switch (type) {
1916 case GL_BITMAP:
1917 case GL_BYTE:
1918 case GL_UNSIGNED_BYTE:
1919 case GL_SHORT:
1920 case GL_UNSIGNED_SHORT:
1921 case GL_INT:
1922 case GL_UNSIGNED_INT:
1923 case GL_FLOAT:
1924 case GL_HALF_FLOAT:
1925 return GL_NO_ERROR;
1926 default:
1927 return GL_INVALID_ENUM;
1928 }
1929
1930 case GL_RED:
1931 case GL_GREEN:
1932 case GL_BLUE:
1933 case GL_ALPHA:
1934 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
1935 case GL_INTENSITY:
1936 #endif
1937 case GL_LUMINANCE:
1938 case GL_LUMINANCE_ALPHA:
1939 case GL_DEPTH_COMPONENT:
1940 switch (type) {
1941 case GL_BYTE:
1942 case GL_UNSIGNED_BYTE:
1943 case GL_SHORT:
1944 case GL_UNSIGNED_SHORT:
1945 case GL_INT:
1946 case GL_UNSIGNED_INT:
1947 case GL_FLOAT:
1948 case GL_HALF_FLOAT:
1949 return GL_NO_ERROR;
1950 default:
1951 return GL_INVALID_ENUM;
1952 }
1953
1954 case GL_RG:
1955 if (!_mesa_has_rg_textures(ctx))
1956 return GL_INVALID_ENUM;
1957 switch (type) {
1958 case GL_BYTE:
1959 case GL_UNSIGNED_BYTE:
1960 case GL_SHORT:
1961 case GL_UNSIGNED_SHORT:
1962 case GL_INT:
1963 case GL_UNSIGNED_INT:
1964 case GL_FLOAT:
1965 case GL_HALF_FLOAT:
1966 return GL_NO_ERROR;
1967 default:
1968 return GL_INVALID_ENUM;
1969 }
1970
1971 case GL_RGB:
1972 switch (type) {
1973 case GL_BYTE:
1974 case GL_UNSIGNED_BYTE:
1975 case GL_SHORT:
1976 case GL_UNSIGNED_SHORT:
1977 case GL_INT:
1978 case GL_UNSIGNED_INT:
1979 case GL_FLOAT:
1980 case GL_UNSIGNED_BYTE_3_3_2:
1981 case GL_UNSIGNED_BYTE_2_3_3_REV:
1982 case GL_UNSIGNED_SHORT_5_6_5:
1983 case GL_UNSIGNED_SHORT_5_6_5_REV:
1984 case GL_HALF_FLOAT:
1985 return GL_NO_ERROR;
1986 case GL_UNSIGNED_INT_2_10_10_10_REV:
1987 /* OK by GL_EXT_texture_type_2_10_10_10_REV */
1988 return (ctx->API == API_OPENGLES2)
1989 ? GL_NO_ERROR : GL_INVALID_ENUM;
1990 case GL_UNSIGNED_INT_5_9_9_9_REV:
1991 return _mesa_has_texture_shared_exponent(ctx)
1992 ? GL_NO_ERROR : GL_INVALID_ENUM;
1993 case GL_UNSIGNED_INT_10F_11F_11F_REV:
1994 return _mesa_has_packed_float(ctx)
1995 ? GL_NO_ERROR : GL_INVALID_ENUM;
1996 default:
1997 return GL_INVALID_ENUM;
1998 }
1999
2000 case GL_BGR:
2001 switch (type) {
2002 /* NOTE: no packed types are supported with BGR. That's
2003 * intentional, according to the GL spec.
2004 */
2005 case GL_BYTE:
2006 case GL_UNSIGNED_BYTE:
2007 case GL_SHORT:
2008 case GL_UNSIGNED_SHORT:
2009 case GL_INT:
2010 case GL_UNSIGNED_INT:
2011 case GL_FLOAT:
2012 case GL_HALF_FLOAT:
2013 return GL_NO_ERROR;
2014 default:
2015 return GL_INVALID_ENUM;
2016 }
2017
2018 case GL_RGBA:
2019 case GL_BGRA:
2020 switch (type) {
2021 case GL_BYTE:
2022 case GL_UNSIGNED_BYTE:
2023 case GL_SHORT:
2024 case GL_UNSIGNED_SHORT:
2025 case GL_INT:
2026 case GL_UNSIGNED_INT:
2027 case GL_FLOAT:
2028 case GL_UNSIGNED_SHORT_4_4_4_4:
2029 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2030 case GL_UNSIGNED_SHORT_5_5_5_1:
2031 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2032 case GL_UNSIGNED_INT_8_8_8_8:
2033 case GL_UNSIGNED_INT_8_8_8_8_REV:
2034 case GL_UNSIGNED_INT_10_10_10_2:
2035 case GL_UNSIGNED_INT_2_10_10_10_REV:
2036 case GL_HALF_FLOAT:
2037 return GL_NO_ERROR;
2038 default:
2039 return GL_INVALID_ENUM;
2040 }
2041
2042 case GL_ABGR_EXT:
2043 switch (type) {
2044 case GL_BYTE:
2045 case GL_UNSIGNED_BYTE:
2046 case GL_SHORT:
2047 case GL_UNSIGNED_SHORT:
2048 case GL_INT:
2049 case GL_UNSIGNED_INT:
2050 case GL_FLOAT:
2051 case GL_UNSIGNED_SHORT_4_4_4_4:
2052 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2053 case GL_UNSIGNED_INT_8_8_8_8:
2054 case GL_UNSIGNED_INT_8_8_8_8_REV:
2055 case GL_HALF_FLOAT:
2056 return GL_NO_ERROR;
2057 default:
2058 return GL_INVALID_ENUM;
2059 }
2060
2061 case GL_YCBCR_MESA:
2062 if (!_mesa_has_MESA_ycbcr_texture(ctx))
2063 return GL_INVALID_ENUM;
2064 if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
2065 type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
2066 return GL_NO_ERROR;
2067 else
2068 return GL_INVALID_OPERATION;
2069
2070 case GL_DEPTH_STENCIL:
2071 if (type == GL_UNSIGNED_INT_24_8)
2072 return GL_NO_ERROR;
2073 else if (_mesa_has_float_depth_buffer(ctx) &&
2074 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
2075 return GL_NO_ERROR;
2076 else
2077 return GL_INVALID_ENUM;
2078
2079 /* integer-valued formats */
2080 case GL_RED_INTEGER_EXT:
2081 case GL_GREEN_INTEGER_EXT:
2082 case GL_BLUE_INTEGER_EXT:
2083 case GL_ALPHA_INTEGER_EXT:
2084 case GL_RG_INTEGER:
2085 switch (type) {
2086 case GL_BYTE:
2087 case GL_UNSIGNED_BYTE:
2088 case GL_SHORT:
2089 case GL_UNSIGNED_SHORT:
2090 case GL_INT:
2091 case GL_UNSIGNED_INT:
2092 return _mesa_has_integer_textures(ctx)
2093 ? GL_NO_ERROR : GL_INVALID_ENUM;
2094 default:
2095 return GL_INVALID_ENUM;
2096 }
2097
2098 case GL_RGB_INTEGER_EXT:
2099 switch (type) {
2100 case GL_BYTE:
2101 case GL_UNSIGNED_BYTE:
2102 case GL_SHORT:
2103 case GL_UNSIGNED_SHORT:
2104 case GL_INT:
2105 case GL_UNSIGNED_INT:
2106 return _mesa_has_integer_textures(ctx)
2107 ? GL_NO_ERROR : GL_INVALID_ENUM;
2108 case GL_UNSIGNED_BYTE_3_3_2:
2109 case GL_UNSIGNED_BYTE_2_3_3_REV:
2110 case GL_UNSIGNED_SHORT_5_6_5:
2111 case GL_UNSIGNED_SHORT_5_6_5_REV:
2112 return _mesa_has_texture_rgb10_a2ui(ctx)
2113 ? GL_NO_ERROR : GL_INVALID_ENUM;
2114 default:
2115 return GL_INVALID_ENUM;
2116 }
2117
2118 case GL_BGR_INTEGER_EXT:
2119 switch (type) {
2120 case GL_BYTE:
2121 case GL_UNSIGNED_BYTE:
2122 case GL_SHORT:
2123 case GL_UNSIGNED_SHORT:
2124 case GL_INT:
2125 case GL_UNSIGNED_INT:
2126 /* NOTE: no packed formats w/ BGR format */
2127 return _mesa_has_integer_textures(ctx)
2128 ? GL_NO_ERROR : GL_INVALID_ENUM;
2129 default:
2130 return GL_INVALID_ENUM;
2131 }
2132
2133 case GL_RGBA_INTEGER_EXT:
2134 case GL_BGRA_INTEGER_EXT:
2135 switch (type) {
2136 case GL_BYTE:
2137 case GL_UNSIGNED_BYTE:
2138 case GL_SHORT:
2139 case GL_UNSIGNED_SHORT:
2140 case GL_INT:
2141 case GL_UNSIGNED_INT:
2142 return _mesa_has_integer_textures(ctx)
2143 ? GL_NO_ERROR : GL_INVALID_ENUM;
2144 case GL_UNSIGNED_SHORT_4_4_4_4:
2145 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2146 case GL_UNSIGNED_SHORT_5_5_5_1:
2147 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2148 case GL_UNSIGNED_INT_8_8_8_8:
2149 case GL_UNSIGNED_INT_8_8_8_8_REV:
2150 case GL_UNSIGNED_INT_10_10_10_2:
2151 case GL_UNSIGNED_INT_2_10_10_10_REV:
2152 return _mesa_has_texture_rgb10_a2ui(ctx)
2153 ? GL_NO_ERROR : GL_INVALID_ENUM;
2154 default:
2155 return GL_INVALID_ENUM;
2156 }
2157
2158 case GL_LUMINANCE_INTEGER_EXT:
2159 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
2160 switch (type) {
2161 case GL_BYTE:
2162 case GL_UNSIGNED_BYTE:
2163 case GL_SHORT:
2164 case GL_UNSIGNED_SHORT:
2165 case GL_INT:
2166 case GL_UNSIGNED_INT:
2167 return _mesa_has_integer_textures(ctx)
2168 ? GL_NO_ERROR : GL_INVALID_ENUM;
2169 default:
2170 return GL_INVALID_ENUM;
2171 }
2172
2173 default:
2174 return GL_INVALID_ENUM;
2175 }
2176 return GL_NO_ERROR;
2177 }
2178
2179
2180 /**
2181 * Do error checking of format/type combinations for OpenGL ES glReadPixels
2182 * and glTex[Sub]Image.
2183 * \return error code, or GL_NO_ERROR.
2184 */
2185 GLenum
_mesa_es_error_check_format_and_type(const struct gl_context * ctx,GLenum format,GLenum type,unsigned dimensions)2186 _mesa_es_error_check_format_and_type(const struct gl_context *ctx,
2187 GLenum format, GLenum type,
2188 unsigned dimensions)
2189 {
2190 GLboolean type_valid = GL_TRUE;
2191
2192 switch (format) {
2193 case GL_RED:
2194 case GL_RG:
2195 if (!_mesa_has_rg_textures(ctx))
2196 return GL_INVALID_VALUE;
2197 FALLTHROUGH;
2198 case GL_ALPHA:
2199 case GL_LUMINANCE:
2200 case GL_LUMINANCE_ALPHA:
2201 type_valid = (type == GL_UNSIGNED_BYTE
2202 || type == GL_FLOAT
2203 || type == GL_HALF_FLOAT_OES);
2204 break;
2205
2206 case GL_RGB:
2207 type_valid = (type == GL_UNSIGNED_BYTE
2208 || type == GL_UNSIGNED_SHORT_5_6_5
2209 || type == GL_FLOAT
2210 || type == GL_HALF_FLOAT_OES);
2211 break;
2212
2213 case GL_RGBA:
2214 type_valid = (type == GL_UNSIGNED_BYTE
2215 || type == GL_UNSIGNED_SHORT_4_4_4_4
2216 || type == GL_UNSIGNED_SHORT_5_5_5_1
2217 || type == GL_FLOAT
2218 || type == GL_HALF_FLOAT_OES
2219 || (_mesa_has_texture_type_2_10_10_10_REV(ctx) &&
2220 type == GL_UNSIGNED_INT_2_10_10_10_REV));
2221 break;
2222
2223 case GL_DEPTH_COMPONENT:
2224 /* This format is filtered against invalid dimensionalities elsewhere.
2225 */
2226 type_valid = (type == GL_UNSIGNED_SHORT
2227 || type == GL_UNSIGNED_INT);
2228 break;
2229
2230 case GL_DEPTH_STENCIL:
2231 /* This format is filtered against invalid dimensionalities elsewhere.
2232 */
2233 type_valid = (type == GL_UNSIGNED_INT_24_8);
2234 break;
2235
2236 case GL_BGRA_EXT:
2237 type_valid = (type == GL_UNSIGNED_BYTE);
2238
2239 /* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
2240 * the format does not appear to be allowed for 3D textures in OpenGL
2241 * ES.
2242 */
2243 if (dimensions != 2)
2244 return GL_INVALID_VALUE;
2245
2246 break;
2247
2248 default:
2249 return GL_INVALID_VALUE;
2250 }
2251
2252 return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
2253 }
2254
2255 /**
2256 * Return the simple base format for a given internal texture format.
2257 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
2258 *
2259 * \param ctx GL context.
2260 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
2261 *
2262 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
2263 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
2264 *
2265 * This is the format which is used during texture application (i.e. the
2266 * texture format and env mode determine the arithmetic used.
2267 */
2268 GLint
_mesa_base_tex_format(const struct gl_context * ctx,GLint internalFormat)2269 _mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
2270 {
2271 switch (internalFormat) {
2272 case GL_ALPHA:
2273 case GL_ALPHA4:
2274 case GL_ALPHA8:
2275 case GL_ALPHA12:
2276 case GL_ALPHA16:
2277 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2278 case 1:
2279 case GL_LUMINANCE:
2280 case GL_LUMINANCE4:
2281 case GL_LUMINANCE8:
2282 case GL_LUMINANCE12:
2283 case GL_LUMINANCE16:
2284 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2285 case 2:
2286 case GL_LUMINANCE_ALPHA:
2287 case GL_LUMINANCE4_ALPHA4:
2288 case GL_LUMINANCE6_ALPHA2:
2289 case GL_LUMINANCE8_ALPHA8:
2290 case GL_LUMINANCE12_ALPHA4:
2291 case GL_LUMINANCE12_ALPHA12:
2292 case GL_LUMINANCE16_ALPHA16:
2293 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2294 case GL_INTENSITY:
2295 case GL_INTENSITY4:
2296 case GL_INTENSITY8:
2297 case GL_INTENSITY12:
2298 case GL_INTENSITY16:
2299 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2300 case 3:
2301 return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
2302 case GL_RGB:
2303 case GL_R3_G3_B2:
2304 case GL_RGB4:
2305 case GL_RGB5:
2306 case GL_RGB8:
2307 case GL_RGB10:
2308 case GL_RGB12:
2309 case GL_RGB16:
2310 return GL_RGB;
2311 case 4:
2312 return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
2313 case GL_RGBA:
2314 case GL_RGBA2:
2315 case GL_RGBA4:
2316 case GL_RGB5_A1:
2317 case GL_RGBA8:
2318 case GL_RGB10_A2:
2319 case GL_RGBA12:
2320 case GL_RGBA16:
2321 return GL_RGBA;
2322 default:
2323 ; /* fallthrough */
2324 }
2325
2326 /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
2327 */
2328 if (_mesa_is_gles(ctx)) {
2329 switch (internalFormat) {
2330 case GL_BGRA:
2331 return GL_RGBA;
2332 default:
2333 ; /* fallthrough */
2334 }
2335 }
2336
2337 if (_mesa_has_ARB_ES2_compatibility(ctx) ||
2338 _mesa_has_OES_framebuffer_object(ctx) ||
2339 ctx->API == API_OPENGLES2) {
2340 switch (internalFormat) {
2341 case GL_RGB565:
2342 return GL_RGB;
2343 default:
2344 ; /* fallthrough */
2345 }
2346 }
2347
2348 if (_mesa_has_ARB_depth_texture(ctx) || _mesa_has_OES_depth_texture(ctx) ||
2349 ctx->API == API_OPENGL_CORE) {
2350 switch (internalFormat) {
2351 case GL_DEPTH_COMPONENT:
2352 case GL_DEPTH_COMPONENT16:
2353 case GL_DEPTH_COMPONENT24:
2354 case GL_DEPTH_COMPONENT32:
2355 return GL_DEPTH_COMPONENT;
2356 case GL_DEPTH_STENCIL:
2357 case GL_DEPTH24_STENCIL8:
2358 return GL_DEPTH_STENCIL;
2359 default:
2360 ; /* fallthrough */
2361 }
2362 }
2363
2364 if (_mesa_has_ARB_texture_stencil8(ctx) ||
2365 _mesa_has_OES_texture_stencil8(ctx)) {
2366 switch (internalFormat) {
2367 case GL_STENCIL_INDEX:
2368 case GL_STENCIL_INDEX1:
2369 case GL_STENCIL_INDEX4:
2370 case GL_STENCIL_INDEX8:
2371 case GL_STENCIL_INDEX16:
2372 return GL_STENCIL_INDEX;
2373 default:
2374 ; /* fallthrough */
2375 }
2376 }
2377
2378 switch (internalFormat) {
2379 case GL_COMPRESSED_ALPHA:
2380 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2381 case GL_COMPRESSED_LUMINANCE:
2382 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2383 case GL_COMPRESSED_LUMINANCE_ALPHA:
2384 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2385 case GL_COMPRESSED_INTENSITY:
2386 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2387 case GL_COMPRESSED_RGB:
2388 return GL_RGB;
2389 case GL_COMPRESSED_RGBA:
2390 return GL_RGBA;
2391 default:
2392 ; /* fallthrough */
2393 }
2394
2395 if (_mesa_is_compressed_format(ctx, internalFormat)) {
2396 GLenum base_compressed =
2397 _mesa_gl_compressed_format_base_format(internalFormat);
2398 if (base_compressed)
2399 return base_compressed;
2400 }
2401
2402 if ((_mesa_has_KHR_texture_compression_astc_ldr(ctx) &&
2403 is_astc_2d_format(internalFormat)) ||
2404 (_mesa_has_OES_texture_compression_astc(ctx) &&
2405 is_astc_3d_format(internalFormat)))
2406 return GL_RGBA;
2407
2408 if (_mesa_has_MESA_ycbcr_texture(ctx)) {
2409 if (internalFormat == GL_YCBCR_MESA)
2410 return GL_YCBCR_MESA;
2411 }
2412
2413 if (_mesa_has_half_float_textures(ctx)) {
2414 switch (internalFormat) {
2415 case GL_ALPHA16F_ARB:
2416 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2417 case GL_RGBA16F_ARB:
2418 return GL_RGBA;
2419 case GL_RGB16F_ARB:
2420 return GL_RGB;
2421 case GL_INTENSITY16F_ARB:
2422 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2423 case GL_LUMINANCE16F_ARB:
2424 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2425 case GL_LUMINANCE_ALPHA16F_ARB:
2426 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2427 }
2428 }
2429
2430 if (_mesa_has_float_textures(ctx)) {
2431 switch (internalFormat) {
2432 case GL_ALPHA32F_ARB:
2433 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2434 case GL_RGBA32F_ARB:
2435 return GL_RGBA;
2436 case GL_RGB32F_ARB:
2437 return GL_RGB;
2438 case GL_INTENSITY32F_ARB:
2439 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2440 case GL_LUMINANCE32F_ARB:
2441 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2442 case GL_LUMINANCE_ALPHA32F_ARB:
2443 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2444 }
2445 }
2446
2447 if (_mesa_has_EXT_texture_snorm(ctx) || _mesa_is_gles3(ctx)) {
2448 switch (internalFormat) {
2449 case GL_RED_SNORM:
2450 case GL_R8_SNORM:
2451 case GL_R16_SNORM:
2452 return GL_RED;
2453 case GL_RG_SNORM:
2454 case GL_RG8_SNORM:
2455 case GL_RG16_SNORM:
2456 return GL_RG;
2457 case GL_RGB_SNORM:
2458 case GL_RGB8_SNORM:
2459 case GL_RGB16_SNORM:
2460 return GL_RGB;
2461 case GL_RGBA_SNORM:
2462 case GL_RGBA8_SNORM:
2463 case GL_RGBA16_SNORM:
2464 return GL_RGBA;
2465 case GL_ALPHA_SNORM:
2466 case GL_ALPHA8_SNORM:
2467 case GL_ALPHA16_SNORM:
2468 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2469 case GL_LUMINANCE_SNORM:
2470 case GL_LUMINANCE8_SNORM:
2471 case GL_LUMINANCE16_SNORM:
2472 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2473 case GL_LUMINANCE_ALPHA_SNORM:
2474 case GL_LUMINANCE8_ALPHA8_SNORM:
2475 case GL_LUMINANCE16_ALPHA16_SNORM:
2476 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2477 case GL_INTENSITY_SNORM:
2478 case GL_INTENSITY8_SNORM:
2479 case GL_INTENSITY16_SNORM:
2480 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2481 default:
2482 ; /* fallthrough */
2483 }
2484 }
2485
2486 if (_mesa_has_EXT_texture_sRGB(ctx) || _mesa_is_gles3(ctx)) {
2487 switch (internalFormat) {
2488 case GL_SRGB_EXT:
2489 case GL_SRGB8_EXT:
2490 case GL_COMPRESSED_SRGB_EXT:
2491 return GL_RGB;
2492 case GL_SRGB_ALPHA_EXT:
2493 case GL_SRGB8_ALPHA8_EXT:
2494 case GL_COMPRESSED_SRGB_ALPHA_EXT:
2495 return GL_RGBA;
2496 case GL_SLUMINANCE_ALPHA_EXT:
2497 case GL_SLUMINANCE8_ALPHA8_EXT:
2498 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
2499 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2500 case GL_SLUMINANCE_EXT:
2501 case GL_SLUMINANCE8_EXT:
2502 case GL_COMPRESSED_SLUMINANCE_EXT:
2503 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2504 default:
2505 ; /* fallthrough */
2506 }
2507 }
2508
2509 if (_mesa_has_EXT_texture_sRGB_R8(ctx)) {
2510 switch (internalFormat) {
2511 case GL_SR8_EXT:
2512 return GL_RED;
2513 default:
2514 ; /* fallthrough */
2515 }
2516 }
2517
2518 if (_mesa_has_EXT_texture_sRGB_RG8(ctx)) {
2519 switch (internalFormat) {
2520 case GL_SRG8_EXT:
2521 return GL_RG;
2522 default:
2523 ; /* fallthrough */
2524 }
2525 }
2526
2527 if (_mesa_has_integer_textures(ctx)) {
2528 switch (internalFormat) {
2529 case GL_RGBA8UI_EXT:
2530 case GL_RGBA16UI_EXT:
2531 case GL_RGBA32UI_EXT:
2532 case GL_RGBA8I_EXT:
2533 case GL_RGBA16I_EXT:
2534 case GL_RGBA32I_EXT:
2535 return GL_RGBA;
2536 case GL_RGB8UI_EXT:
2537 case GL_RGB16UI_EXT:
2538 case GL_RGB32UI_EXT:
2539 case GL_RGB8I_EXT:
2540 case GL_RGB16I_EXT:
2541 case GL_RGB32I_EXT:
2542 return GL_RGB;
2543 }
2544 }
2545
2546 if (_mesa_has_texture_rgb10_a2ui(ctx)) {
2547 switch (internalFormat) {
2548 case GL_RGB10_A2UI:
2549 return GL_RGBA;
2550 }
2551 }
2552
2553 if (_mesa_has_integer_textures(ctx)) {
2554 switch (internalFormat) {
2555 case GL_ALPHA8UI_EXT:
2556 case GL_ALPHA16UI_EXT:
2557 case GL_ALPHA32UI_EXT:
2558 case GL_ALPHA8I_EXT:
2559 case GL_ALPHA16I_EXT:
2560 case GL_ALPHA32I_EXT:
2561 return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
2562 case GL_INTENSITY8UI_EXT:
2563 case GL_INTENSITY16UI_EXT:
2564 case GL_INTENSITY32UI_EXT:
2565 case GL_INTENSITY8I_EXT:
2566 case GL_INTENSITY16I_EXT:
2567 case GL_INTENSITY32I_EXT:
2568 return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
2569 case GL_LUMINANCE8UI_EXT:
2570 case GL_LUMINANCE16UI_EXT:
2571 case GL_LUMINANCE32UI_EXT:
2572 case GL_LUMINANCE8I_EXT:
2573 case GL_LUMINANCE16I_EXT:
2574 case GL_LUMINANCE32I_EXT:
2575 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
2576 case GL_LUMINANCE_ALPHA8UI_EXT:
2577 case GL_LUMINANCE_ALPHA16UI_EXT:
2578 case GL_LUMINANCE_ALPHA32UI_EXT:
2579 case GL_LUMINANCE_ALPHA8I_EXT:
2580 case GL_LUMINANCE_ALPHA16I_EXT:
2581 case GL_LUMINANCE_ALPHA32I_EXT:
2582 return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
2583 default:
2584 ; /* fallthrough */
2585 }
2586 }
2587
2588 if (_mesa_has_rg_textures(ctx)) {
2589 switch (internalFormat) {
2590 case GL_R16F:
2591 if (!_mesa_has_half_float_textures(ctx))
2592 break;
2593 return GL_RED;
2594 case GL_R32F:
2595 if (!_mesa_has_float_textures(ctx))
2596 break;
2597 return GL_RED;
2598 case GL_R8I:
2599 case GL_R8UI:
2600 case GL_R16I:
2601 case GL_R16UI:
2602 case GL_R32I:
2603 case GL_R32UI:
2604 if (!_mesa_has_integer_textures(ctx))
2605 break;
2606 FALLTHROUGH;
2607 case GL_R8:
2608 case GL_R16:
2609 case GL_RED:
2610 case GL_COMPRESSED_RED:
2611 return GL_RED;
2612
2613 case GL_RG16F:
2614 if (!_mesa_has_half_float_textures(ctx))
2615 break;
2616 return GL_RG;
2617 case GL_RG32F:
2618 if (!_mesa_has_float_textures(ctx))
2619 break;
2620 return GL_RG;
2621 case GL_RG8I:
2622 case GL_RG8UI:
2623 case GL_RG16I:
2624 case GL_RG16UI:
2625 case GL_RG32I:
2626 case GL_RG32UI:
2627 if (!_mesa_has_integer_textures(ctx))
2628 break;
2629 FALLTHROUGH;
2630 case GL_RG:
2631 case GL_RG8:
2632 case GL_RG16:
2633 case GL_COMPRESSED_RG:
2634 return GL_RG;
2635 default:
2636 ; /* fallthrough */
2637 }
2638 }
2639
2640 if (_mesa_has_texture_shared_exponent(ctx)) {
2641 switch (internalFormat) {
2642 case GL_RGB9_E5_EXT:
2643 return GL_RGB;
2644 default:
2645 ; /* fallthrough */
2646 }
2647 }
2648
2649 if (_mesa_has_packed_float(ctx)) {
2650 switch (internalFormat) {
2651 case GL_R11F_G11F_B10F_EXT:
2652 return GL_RGB;
2653 default:
2654 ; /* fallthrough */
2655 }
2656 }
2657
2658 if (_mesa_has_float_depth_buffer(ctx)) {
2659 switch (internalFormat) {
2660 case GL_DEPTH_COMPONENT32F:
2661 return GL_DEPTH_COMPONENT;
2662 case GL_DEPTH32F_STENCIL8:
2663 return GL_DEPTH_STENCIL;
2664 default:
2665 ; /* fallthrough */
2666 }
2667 }
2668
2669 return -1; /* error */
2670 }
2671
2672 /**
2673 * Returns the effective internal format from a texture format and type.
2674 * This is used by texture image operations internally for validation, when
2675 * the specified internal format is a base (unsized) format.
2676 *
2677 * This method will only return a valid effective internal format if the
2678 * combination of format, type and internal format in base form, is acceptable.
2679 *
2680 * If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
2681 * in extensions, to unambiguously correspond to the given base format, then
2682 * that internal format is returned as the effective. Otherwise, if the
2683 * combination is accepted but a single effective format is not defined, the
2684 * passed base format will be returned instead.
2685 *
2686 * \param format the texture format
2687 * \param type the texture type
2688 */
2689 static GLenum
gles_effective_internal_format_for_format_and_type(GLenum format,GLenum type)2690 gles_effective_internal_format_for_format_and_type(GLenum format,
2691 GLenum type)
2692 {
2693 switch (type) {
2694 case GL_UNSIGNED_BYTE:
2695 switch (format) {
2696 case GL_RGBA:
2697 return GL_RGBA8;
2698 case GL_RGB:
2699 return GL_RGB8;
2700 case GL_RG:
2701 return GL_RG8;
2702 case GL_RED:
2703 return GL_R8;
2704 /* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
2705 * (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
2706 * internal formats, they do not correspond to GL constants, so the base
2707 * format is returned instead.
2708 */
2709 case GL_BGRA_EXT:
2710 case GL_LUMINANCE_ALPHA:
2711 case GL_LUMINANCE:
2712 case GL_ALPHA:
2713 return format;
2714 }
2715 break;
2716
2717 case GL_UNSIGNED_SHORT_4_4_4_4:
2718 if (format == GL_RGBA)
2719 return GL_RGBA4;
2720 break;
2721
2722 case GL_UNSIGNED_SHORT_5_5_5_1:
2723 if (format == GL_RGBA)
2724 return GL_RGB5_A1;
2725 break;
2726
2727 case GL_UNSIGNED_SHORT_5_6_5:
2728 if (format == GL_RGB)
2729 return GL_RGB565;
2730 break;
2731
2732 /* OES_packed_depth_stencil */
2733 case GL_UNSIGNED_INT_24_8:
2734 if (format == GL_DEPTH_STENCIL)
2735 return GL_DEPTH24_STENCIL8;
2736 break;
2737
2738 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
2739 if (format == GL_DEPTH_STENCIL)
2740 return GL_DEPTH32F_STENCIL8;
2741 break;
2742
2743 case GL_UNSIGNED_SHORT:
2744 if (format == GL_DEPTH_COMPONENT)
2745 return GL_DEPTH_COMPONENT16;
2746 break;
2747
2748 case GL_UNSIGNED_INT:
2749 /* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
2750 * the format.
2751 */
2752 if (format == GL_DEPTH_COMPONENT)
2753 return format;
2754 break;
2755
2756 /* OES_texture_float and OES_texture_half_float */
2757 case GL_FLOAT:
2758 if (format == GL_DEPTH_COMPONENT)
2759 return GL_DEPTH_COMPONENT32F;
2760 FALLTHROUGH;
2761 case GL_HALF_FLOAT_OES:
2762 switch (format) {
2763 case GL_RGBA:
2764 case GL_RGB:
2765 case GL_LUMINANCE_ALPHA:
2766 case GL_LUMINANCE:
2767 case GL_ALPHA:
2768 case GL_RED:
2769 case GL_RG:
2770 return format;
2771 }
2772 break;
2773 case GL_HALF_FLOAT:
2774 switch (format) {
2775 case GL_RG:
2776 case GL_RED:
2777 return format;
2778 }
2779 break;
2780
2781 /* GL_EXT_texture_type_2_10_10_10_REV */
2782 case GL_UNSIGNED_INT_2_10_10_10_REV:
2783 switch (format) {
2784 case GL_RGBA:
2785 case GL_RGB:
2786 return format;
2787 }
2788 break;
2789
2790 default:
2791 /* fall through and return NONE */
2792 break;
2793 }
2794
2795 return GL_NONE;
2796 }
2797
2798 /**
2799 * Do error checking of format/type combinations for OpenGL ES 3
2800 * glTex[Sub]Image, or ES1/ES2 with GL_OES_required_internalformat.
2801 * \return error code, or GL_NO_ERROR.
2802 */
2803 GLenum
_mesa_gles_error_check_format_and_type(const struct gl_context * ctx,GLenum format,GLenum type,GLenum internalFormat)2804 _mesa_gles_error_check_format_and_type(const struct gl_context *ctx,
2805 GLenum format, GLenum type,
2806 GLenum internalFormat)
2807 {
2808 /* If internalFormat is an unsized format, then the effective internal
2809 * format derived from format and type should be used instead. Page 127,
2810 * section "3.8 Texturing" of the GLES 3.0.4 spec states:
2811 *
2812 * "if internalformat is a base internal format, the effective
2813 * internal format is a sized internal format that is derived
2814 * from the format and type for internal use by the GL.
2815 * Table 3.12 specifies the mapping of format and type to effective
2816 * internal formats. The effective internal format is used by the GL
2817 * for purposes such as texture completeness or type checks for
2818 * CopyTex* commands. In these cases, the GL is required to operate
2819 * as if the effective internal format was used as the internalformat
2820 * when specifying the texture data."
2821 */
2822 if (_mesa_is_enum_format_unsized(internalFormat)) {
2823 GLenum effectiveInternalFormat =
2824 gles_effective_internal_format_for_format_and_type(format, type);
2825
2826 if (effectiveInternalFormat == GL_NONE)
2827 return GL_INVALID_OPERATION;
2828
2829 GLenum baseInternalFormat;
2830 if (internalFormat == GL_BGRA_EXT) {
2831 /* Unfortunately, _mesa_base_tex_format returns a base format of
2832 * GL_RGBA for GL_BGRA_EXT. This makes perfect sense if you're
2833 * asking the question, "what channels does this format have?"
2834 * However, if we're trying to determine if two internal formats
2835 * match in the ES3 sense, we actually want GL_BGRA.
2836 */
2837 baseInternalFormat = GL_BGRA_EXT;
2838 } else {
2839 baseInternalFormat =
2840 _mesa_base_tex_format(ctx, effectiveInternalFormat);
2841 }
2842
2843 if (internalFormat != baseInternalFormat)
2844 return GL_INVALID_OPERATION;
2845
2846 internalFormat = effectiveInternalFormat;
2847 }
2848
2849 /* The GLES variant of EXT_texture_compression_s3tc is very vague and
2850 * doesn't list valid types. Just do exactly what the spec says.
2851 */
2852 if (_mesa_has_EXT_texture_compression_s3tc(ctx) &&
2853 (internalFormat == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||
2854 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ||
2855 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT3_EXT ||
2856 internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT5_EXT))
2857 return format == GL_RGB || format == GL_RGBA ? GL_NO_ERROR :
2858 GL_INVALID_OPERATION;
2859
2860 switch (format) {
2861 case GL_BGRA_EXT:
2862 if (type != GL_UNSIGNED_BYTE ||
2863 (internalFormat != GL_BGRA &&
2864 internalFormat != GL_RGBA8 &&
2865 internalFormat != GL_SRGB8_ALPHA8))
2866 return GL_INVALID_OPERATION;
2867 break;
2868
2869 case GL_BGR_EXT:
2870 if (type != GL_UNSIGNED_BYTE ||
2871 (internalFormat != GL_RGB8 &&
2872 internalFormat != GL_SRGB8))
2873 return GL_INVALID_OPERATION;
2874 break;
2875
2876 case GL_RGBA:
2877 switch (type) {
2878 case GL_UNSIGNED_BYTE:
2879 switch (internalFormat) {
2880 case GL_RGBA:
2881 case GL_RGBA8:
2882 case GL_RGB5_A1:
2883 case GL_RGBA4:
2884 break;
2885 case GL_SRGB8_ALPHA8_EXT:
2886 if (ctx->Version <= 20)
2887 return GL_INVALID_OPERATION;
2888 break;
2889 case GL_COMPRESSED_RGBA_BPTC_UNORM:
2890 case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
2891 if (!_mesa_has_EXT_texture_compression_bptc(ctx))
2892 return GL_INVALID_OPERATION;
2893 break;
2894 default:
2895 return GL_INVALID_OPERATION;
2896 }
2897 break;
2898
2899 case GL_BYTE:
2900 if (ctx->Version <= 20 || internalFormat != GL_RGBA8_SNORM)
2901 return GL_INVALID_OPERATION;
2902 break;
2903
2904 case GL_UNSIGNED_SHORT:
2905 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGBA16)
2906 return GL_INVALID_OPERATION;
2907 break;
2908
2909 case GL_SHORT:
2910 if (!_mesa_has_EXT_texture_norm16(ctx) ||
2911 internalFormat != GL_RGBA16_SNORM)
2912 return GL_INVALID_OPERATION;
2913 break;
2914
2915 case GL_UNSIGNED_SHORT_4_4_4_4:
2916 switch (internalFormat) {
2917 case GL_RGBA:
2918 case GL_RGBA4:
2919 break;
2920 default:
2921 return GL_INVALID_OPERATION;
2922 }
2923 break;
2924
2925 case GL_UNSIGNED_SHORT_5_5_5_1:
2926 switch (internalFormat) {
2927 case GL_RGBA:
2928 case GL_RGB5_A1:
2929 break;
2930 default:
2931 return GL_INVALID_OPERATION;
2932 }
2933 break;
2934
2935 case GL_UNSIGNED_INT_2_10_10_10_REV:
2936 switch (internalFormat) {
2937 case GL_RGBA:
2938 case GL_RGB10_A2:
2939 case GL_RGB5_A1:
2940 if (!_mesa_has_texture_type_2_10_10_10_REV(ctx))
2941 return GL_INVALID_OPERATION;
2942 break;
2943 default:
2944 return GL_INVALID_OPERATION;
2945 }
2946 break;
2947
2948 case GL_HALF_FLOAT:
2949 if (ctx->Version <= 20 || internalFormat != GL_RGBA16F)
2950 return GL_INVALID_OPERATION;
2951 break;
2952
2953 case GL_FLOAT:
2954 switch (internalFormat) {
2955 case GL_RGBA16F:
2956 case GL_RGBA32F:
2957 if (ctx->Version <= 20)
2958 return GL_INVALID_OPERATION;
2959 break;
2960 case GL_RGBA:
2961 if (!_mesa_has_OES_texture_float(ctx) || internalFormat != format)
2962 return GL_INVALID_OPERATION;
2963 break;
2964 default:
2965 return GL_INVALID_OPERATION;
2966 }
2967 break;
2968
2969 case GL_HALF_FLOAT_OES:
2970 if (!_mesa_has_OES_texture_half_float(ctx) || internalFormat != format)
2971 return GL_INVALID_OPERATION;
2972 break;
2973 default:
2974 return GL_INVALID_OPERATION;
2975 }
2976 break;
2977
2978 case GL_RGBA_INTEGER:
2979 if (ctx->Version <= 20)
2980 return GL_INVALID_OPERATION;
2981 switch (type) {
2982 case GL_UNSIGNED_BYTE:
2983 if (internalFormat != GL_RGBA8UI)
2984 return GL_INVALID_OPERATION;
2985 break;
2986
2987 case GL_BYTE:
2988 if (internalFormat != GL_RGBA8I)
2989 return GL_INVALID_OPERATION;
2990 break;
2991
2992 case GL_UNSIGNED_SHORT:
2993 if (internalFormat != GL_RGBA16UI)
2994 return GL_INVALID_OPERATION;
2995 break;
2996
2997 case GL_SHORT:
2998 if (internalFormat != GL_RGBA16I)
2999 return GL_INVALID_OPERATION;
3000 break;
3001
3002 case GL_UNSIGNED_INT:
3003 if (internalFormat != GL_RGBA32UI)
3004 return GL_INVALID_OPERATION;
3005 break;
3006
3007 case GL_INT:
3008 if (internalFormat != GL_RGBA32I)
3009 return GL_INVALID_OPERATION;
3010 break;
3011
3012 case GL_UNSIGNED_INT_2_10_10_10_REV:
3013 if (internalFormat != GL_RGB10_A2UI)
3014 return GL_INVALID_OPERATION;
3015 break;
3016
3017 default:
3018 return GL_INVALID_OPERATION;
3019 }
3020 break;
3021
3022 case GL_RGB:
3023 switch (type) {
3024 case GL_UNSIGNED_BYTE:
3025 switch (internalFormat) {
3026 case GL_RGB:
3027 case GL_RGB8:
3028 case GL_RGB565:
3029 break;
3030 case GL_SRGB8:
3031 if (ctx->Version <= 20)
3032 return GL_INVALID_OPERATION;
3033 break;
3034 default:
3035 return GL_INVALID_OPERATION;
3036 }
3037 break;
3038
3039 case GL_BYTE:
3040 if (ctx->Version <= 20 || internalFormat != GL_RGB8_SNORM)
3041 return GL_INVALID_OPERATION;
3042 break;
3043
3044 case GL_UNSIGNED_SHORT:
3045 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RGB16)
3046 return GL_INVALID_OPERATION;
3047 break;
3048
3049 case GL_SHORT:
3050 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3051 internalFormat != GL_RGB16_SNORM)
3052 return GL_INVALID_OPERATION;
3053 break;
3054
3055 case GL_UNSIGNED_SHORT_5_6_5:
3056 switch (internalFormat) {
3057 case GL_RGB:
3058 case GL_RGB565:
3059 break;
3060 default:
3061 return GL_INVALID_OPERATION;
3062 }
3063 break;
3064
3065 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3066 if (ctx->Version <= 20 || internalFormat != GL_R11F_G11F_B10F)
3067 return GL_INVALID_OPERATION;
3068 break;
3069
3070 case GL_UNSIGNED_INT_5_9_9_9_REV:
3071 if (ctx->Version <= 20 || internalFormat != GL_RGB9_E5)
3072 return GL_INVALID_OPERATION;
3073 break;
3074
3075 case GL_HALF_FLOAT:
3076 if (ctx->Version <= 20)
3077 return GL_INVALID_OPERATION;
3078 switch (internalFormat) {
3079 case GL_RGB16F:
3080 case GL_R11F_G11F_B10F:
3081 case GL_RGB9_E5:
3082 break;
3083 default:
3084 return GL_INVALID_OPERATION;
3085 }
3086 break;
3087
3088 case GL_FLOAT:
3089 switch (internalFormat) {
3090 case GL_RGB16F:
3091 case GL_RGB32F:
3092 case GL_R11F_G11F_B10F:
3093 case GL_RGB9_E5:
3094 if (ctx->Version <= 20)
3095 return GL_INVALID_OPERATION;
3096 break;
3097 case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
3098 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
3099 if (!_mesa_has_EXT_texture_compression_bptc(ctx))
3100 return GL_INVALID_OPERATION;
3101 break;
3102 case GL_RGB:
3103 if (!_mesa_has_OES_texture_float(ctx) || internalFormat != format)
3104 return GL_INVALID_OPERATION;
3105 break;
3106 default:
3107 return GL_INVALID_OPERATION;
3108 }
3109 break;
3110
3111 case GL_HALF_FLOAT_OES:
3112 if (!_mesa_has_OES_texture_half_float(ctx) || internalFormat != format)
3113 return GL_INVALID_OPERATION;
3114 break;
3115
3116 case GL_UNSIGNED_INT_2_10_10_10_REV:
3117 switch (internalFormat) {
3118 case GL_RGB:
3119 case GL_RGB10:
3120 case GL_RGB8:
3121 case GL_RGB565:
3122 /* GL_EXT_texture_type_2_10_10_10_REV allows GL_RGB even though
3123 * GLES3 doesn't, and GL_OES_required_internalformat extends that
3124 * to allow the sized RGB internalformats as well.
3125 */
3126 if (!_mesa_has_texture_type_2_10_10_10_REV(ctx))
3127 return GL_INVALID_OPERATION;
3128 break;
3129 default:
3130 return GL_INVALID_OPERATION;
3131 }
3132 break;
3133
3134 default:
3135 return GL_INVALID_OPERATION;
3136 }
3137 break;
3138
3139 case GL_RGB_INTEGER:
3140 if (ctx->Version <= 20)
3141 return GL_INVALID_OPERATION;
3142 switch (type) {
3143 case GL_UNSIGNED_BYTE:
3144 if (internalFormat != GL_RGB8UI)
3145 return GL_INVALID_OPERATION;
3146 break;
3147
3148 case GL_BYTE:
3149 if (internalFormat != GL_RGB8I)
3150 return GL_INVALID_OPERATION;
3151 break;
3152
3153 case GL_UNSIGNED_SHORT:
3154 if (internalFormat != GL_RGB16UI)
3155 return GL_INVALID_OPERATION;
3156 break;
3157
3158 case GL_SHORT:
3159 if (internalFormat != GL_RGB16I)
3160 return GL_INVALID_OPERATION;
3161 break;
3162
3163 case GL_UNSIGNED_INT:
3164 if (internalFormat != GL_RGB32UI)
3165 return GL_INVALID_OPERATION;
3166 break;
3167
3168 case GL_INT:
3169 if (internalFormat != GL_RGB32I)
3170 return GL_INVALID_OPERATION;
3171 break;
3172
3173 default:
3174 return GL_INVALID_OPERATION;
3175 }
3176 break;
3177
3178 case GL_RG:
3179 if (!_mesa_has_rg_textures(ctx))
3180 return GL_INVALID_OPERATION;
3181 switch (type) {
3182 case GL_UNSIGNED_BYTE:
3183 if (internalFormat == GL_RG8 ||
3184 (_mesa_has_EXT_texture_compression_rgtc(ctx) &&
3185 internalFormat == GL_COMPRESSED_RED_GREEN_RGTC2_EXT) ||
3186 (_mesa_has_EXT_texture_sRGB_RG8(ctx) &&
3187 internalFormat == GL_SRG8_EXT))
3188 break;
3189 return GL_INVALID_OPERATION;
3190
3191 case GL_BYTE:
3192 if (internalFormat != GL_RG8_SNORM &&
3193 (!_mesa_has_EXT_texture_compression_rgtc(ctx) ||
3194 internalFormat != GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT))
3195 return GL_INVALID_OPERATION;
3196 break;
3197
3198 case GL_UNSIGNED_SHORT:
3199 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_RG16)
3200 return GL_INVALID_OPERATION;
3201 break;
3202
3203 case GL_SHORT:
3204 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3205 internalFormat != GL_RG16_SNORM)
3206 return GL_INVALID_OPERATION;
3207 break;
3208
3209 case GL_HALF_FLOAT:
3210 case GL_HALF_FLOAT_OES:
3211 switch (internalFormat) {
3212 case GL_RG16F:
3213 if (ctx->Version <= 20)
3214 return GL_INVALID_OPERATION;
3215 break;
3216 case GL_RG:
3217 if (!_mesa_has_rg_textures(ctx) ||
3218 !_mesa_has_OES_texture_half_float(ctx))
3219 return GL_INVALID_OPERATION;
3220 break;
3221 default:
3222 return GL_INVALID_OPERATION;
3223 }
3224 break;
3225
3226 case GL_FLOAT:
3227 switch (internalFormat) {
3228 case GL_RG16F:
3229 case GL_RG32F:
3230 break;
3231 case GL_RG:
3232 if (!_mesa_has_rg_textures(ctx) ||
3233 !_mesa_has_OES_texture_float(ctx))
3234 return GL_INVALID_OPERATION;
3235 break;
3236 default:
3237 return GL_INVALID_OPERATION;
3238 }
3239 break;
3240
3241 default:
3242 return GL_INVALID_OPERATION;
3243 }
3244 break;
3245
3246 case GL_RG_INTEGER:
3247 if (ctx->Version <= 20)
3248 return GL_INVALID_OPERATION;
3249 switch (type) {
3250 case GL_UNSIGNED_BYTE:
3251 if (internalFormat != GL_RG8UI)
3252 return GL_INVALID_OPERATION;
3253 break;
3254
3255 case GL_BYTE:
3256 if (internalFormat != GL_RG8I)
3257 return GL_INVALID_OPERATION;
3258 break;
3259
3260 case GL_UNSIGNED_SHORT:
3261 if (internalFormat != GL_RG16UI)
3262 return GL_INVALID_OPERATION;
3263 break;
3264
3265 case GL_SHORT:
3266 if (internalFormat != GL_RG16I)
3267 return GL_INVALID_OPERATION;
3268 break;
3269
3270 case GL_UNSIGNED_INT:
3271 if (internalFormat != GL_RG32UI)
3272 return GL_INVALID_OPERATION;
3273 break;
3274
3275 case GL_INT:
3276 if (internalFormat != GL_RG32I)
3277 return GL_INVALID_OPERATION;
3278 break;
3279
3280 default:
3281 return GL_INVALID_OPERATION;
3282 }
3283 break;
3284
3285 case GL_RED:
3286 if (!_mesa_has_rg_textures(ctx))
3287 return GL_INVALID_OPERATION;
3288 switch (type) {
3289 case GL_UNSIGNED_BYTE:
3290 if (internalFormat == GL_R8 ||
3291 ((internalFormat == GL_SR8_EXT) &&
3292 _mesa_has_EXT_texture_sRGB_R8(ctx)) ||
3293 (internalFormat == GL_COMPRESSED_RED_RGTC1_EXT &&
3294 _mesa_has_EXT_texture_compression_rgtc(ctx)))
3295 break;
3296 return GL_INVALID_OPERATION;
3297
3298 case GL_BYTE:
3299 if (internalFormat != GL_R8_SNORM &&
3300 (!_mesa_has_EXT_texture_compression_rgtc(ctx) ||
3301 internalFormat != GL_COMPRESSED_SIGNED_RED_RGTC1_EXT))
3302 return GL_INVALID_OPERATION;
3303 break;
3304
3305 case GL_UNSIGNED_SHORT:
3306 if (!_mesa_has_EXT_texture_norm16(ctx) || internalFormat != GL_R16)
3307 return GL_INVALID_OPERATION;
3308 break;
3309
3310 case GL_SHORT:
3311 if (!_mesa_has_EXT_texture_norm16(ctx) ||
3312 internalFormat != GL_R16_SNORM)
3313 return GL_INVALID_OPERATION;
3314 break;
3315
3316 case GL_HALF_FLOAT:
3317 case GL_HALF_FLOAT_OES:
3318 switch (internalFormat) {
3319 case GL_R16F:
3320 if (ctx->Version <= 20)
3321 return GL_INVALID_OPERATION;
3322 break;
3323 case GL_RG:
3324 case GL_RED:
3325 if (!_mesa_has_rg_textures(ctx) ||
3326 !_mesa_has_OES_texture_half_float(ctx))
3327 return GL_INVALID_OPERATION;
3328 break;
3329 default:
3330 return GL_INVALID_OPERATION;
3331 }
3332 break;
3333
3334 case GL_FLOAT:
3335 switch (internalFormat) {
3336 case GL_R16F:
3337 case GL_R32F:
3338 break;
3339 case GL_RED:
3340 if (!_mesa_has_rg_textures(ctx) ||
3341 !_mesa_has_OES_texture_float(ctx))
3342 return GL_INVALID_OPERATION;
3343 break;
3344 default:
3345 return GL_INVALID_OPERATION;
3346 }
3347 break;
3348
3349 default:
3350 return GL_INVALID_OPERATION;
3351 }
3352 break;
3353
3354 case GL_RED_INTEGER:
3355 if (ctx->Version <= 20)
3356 return GL_INVALID_OPERATION;
3357 switch (type) {
3358 case GL_UNSIGNED_BYTE:
3359 if (internalFormat != GL_R8UI)
3360 return GL_INVALID_OPERATION;
3361 break;
3362
3363 case GL_BYTE:
3364 if (internalFormat != GL_R8I)
3365 return GL_INVALID_OPERATION;
3366 break;
3367
3368 case GL_UNSIGNED_SHORT:
3369 if (internalFormat != GL_R16UI)
3370 return GL_INVALID_OPERATION;
3371 break;
3372
3373 case GL_SHORT:
3374 if (internalFormat != GL_R16I)
3375 return GL_INVALID_OPERATION;
3376 break;
3377
3378 case GL_UNSIGNED_INT:
3379 if (internalFormat != GL_R32UI)
3380 return GL_INVALID_OPERATION;
3381 break;
3382
3383 case GL_INT:
3384 if (internalFormat != GL_R32I)
3385 return GL_INVALID_OPERATION;
3386 break;
3387
3388 default:
3389 return GL_INVALID_OPERATION;
3390 }
3391 break;
3392
3393 case GL_DEPTH_COMPONENT:
3394 switch (type) {
3395 case GL_UNSIGNED_SHORT:
3396 if (internalFormat != GL_DEPTH_COMPONENT
3397 && internalFormat != GL_DEPTH_COMPONENT16)
3398 return GL_INVALID_OPERATION;
3399 break;
3400
3401 case GL_UNSIGNED_INT:
3402 switch (internalFormat) {
3403 case GL_DEPTH_COMPONENT:
3404 case GL_DEPTH_COMPONENT16:
3405 case GL_DEPTH_COMPONENT24:
3406 break;
3407 default:
3408 return GL_INVALID_OPERATION;
3409 }
3410 break;
3411
3412 case GL_FLOAT:
3413 if (ctx->Version <= 20 || internalFormat != GL_DEPTH_COMPONENT32F)
3414 return GL_INVALID_OPERATION;
3415 break;
3416
3417 default:
3418 return GL_INVALID_OPERATION;
3419 }
3420 break;
3421
3422 case GL_DEPTH_STENCIL:
3423 switch (type) {
3424 case GL_UNSIGNED_INT_24_8:
3425 if (internalFormat != GL_DEPTH_STENCIL
3426 && internalFormat != GL_DEPTH24_STENCIL8)
3427 return GL_INVALID_OPERATION;
3428 break;
3429
3430 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3431 if (ctx->Version <= 20 || internalFormat != GL_DEPTH32F_STENCIL8)
3432 return GL_INVALID_OPERATION;
3433 break;
3434
3435 default:
3436 return GL_INVALID_OPERATION;
3437 }
3438 break;
3439
3440 case GL_STENCIL_INDEX:
3441 if (!_mesa_has_OES_texture_stencil8(ctx) ||
3442 type != GL_UNSIGNED_BYTE ||
3443 internalFormat != GL_STENCIL_INDEX8) {
3444 return GL_INVALID_OPERATION;
3445 }
3446 break;
3447
3448 case GL_ALPHA:
3449 case GL_LUMINANCE:
3450 case GL_LUMINANCE_ALPHA:
3451 switch (type) {
3452 case GL_FLOAT:
3453 if (!_mesa_has_OES_texture_float(ctx) || internalFormat != format)
3454 return GL_INVALID_OPERATION;
3455 break;
3456 case GL_HALF_FLOAT_OES:
3457 if (!_mesa_has_OES_texture_half_float(ctx) || internalFormat != format)
3458 return GL_INVALID_OPERATION;
3459 break;
3460 case GL_UNSIGNED_BYTE:
3461 if (!(format == internalFormat ||
3462 (format == GL_ALPHA && internalFormat == GL_ALPHA8) ||
3463 (format == GL_LUMINANCE && internalFormat == GL_LUMINANCE8) ||
3464 (format == GL_LUMINANCE_ALPHA &&
3465 ((internalFormat == GL_LUMINANCE8_ALPHA8) ||
3466 (internalFormat == GL_LUMINANCE4_ALPHA4))))) {
3467 return GL_INVALID_OPERATION;
3468 }
3469 break;
3470 default:
3471 return GL_INVALID_OPERATION;
3472 }
3473 break;
3474 }
3475
3476 return GL_NO_ERROR;
3477 }
3478
3479 static void
set_swizzle(uint8_t * swizzle,int x,int y,int z,int w)3480 set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
3481 {
3482 swizzle[MESA_FORMAT_SWIZZLE_X] = x;
3483 swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
3484 swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
3485 swizzle[MESA_FORMAT_SWIZZLE_W] = w;
3486 }
3487
3488 static bool
get_swizzle_from_gl_format(GLenum format,uint8_t * swizzle)3489 get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
3490 {
3491 switch (format) {
3492 case GL_RGBA:
3493 case GL_RGBA_INTEGER_EXT:
3494 set_swizzle(swizzle, 0, 1, 2, 3);
3495 return true;
3496 case GL_BGRA:
3497 case GL_BGRA_INTEGER_EXT:
3498 set_swizzle(swizzle, 2, 1, 0, 3);
3499 return true;
3500 case GL_ABGR_EXT:
3501 set_swizzle(swizzle, 3, 2, 1, 0);
3502 return true;
3503 case GL_RGB:
3504 case GL_RGB_INTEGER_EXT:
3505 set_swizzle(swizzle, 0, 1, 2, 5);
3506 return true;
3507 case GL_BGR:
3508 case GL_BGR_INTEGER_EXT:
3509 set_swizzle(swizzle, 2, 1, 0, 5);
3510 return true;
3511 case GL_LUMINANCE_ALPHA:
3512 case GL_LUMINANCE_ALPHA_INTEGER_EXT:
3513 set_swizzle(swizzle, 0, 0, 0, 1);
3514 return true;
3515 case GL_RG:
3516 case GL_RG_INTEGER:
3517 set_swizzle(swizzle, 0, 1, 4, 5);
3518 return true;
3519 case GL_RED:
3520 case GL_RED_INTEGER_EXT:
3521 set_swizzle(swizzle, 0, 4, 4, 5);
3522 return true;
3523 case GL_GREEN:
3524 case GL_GREEN_INTEGER_EXT:
3525 set_swizzle(swizzle, 4, 0, 4, 5);
3526 return true;
3527 case GL_BLUE:
3528 case GL_BLUE_INTEGER_EXT:
3529 set_swizzle(swizzle, 4, 4, 0, 5);
3530 return true;
3531 case GL_ALPHA:
3532 case GL_ALPHA_INTEGER_EXT:
3533 set_swizzle(swizzle, 4, 4, 4, 0);
3534 return true;
3535 case GL_LUMINANCE:
3536 case GL_LUMINANCE_INTEGER_EXT:
3537 set_swizzle(swizzle, 0, 0, 0, 5);
3538 return true;
3539 case GL_INTENSITY:
3540 set_swizzle(swizzle, 0, 0, 0, 0);
3541 return true;
3542 case GL_DEPTH_COMPONENT:
3543 set_swizzle(swizzle, 0, 6, 6, 6);
3544 return true;
3545 case GL_STENCIL_INDEX:
3546 set_swizzle(swizzle, 6, 0, 6, 6);
3547 return true;
3548 default:
3549 return false;
3550 }
3551 }
3552
3553 bool
_mesa_swap_bytes_in_type_enum(GLenum * type)3554 _mesa_swap_bytes_in_type_enum(GLenum *type)
3555 {
3556 switch (*type) {
3557 case GL_UNSIGNED_INT_8_8_8_8:
3558 *type = GL_UNSIGNED_INT_8_8_8_8_REV;
3559 return true;
3560 case GL_UNSIGNED_INT_8_8_8_8_REV:
3561 *type = GL_UNSIGNED_INT_8_8_8_8;
3562 return true;
3563 case GL_UNSIGNED_SHORT_8_8_MESA:
3564 *type = GL_UNSIGNED_SHORT_8_8_REV_MESA;
3565 return true;
3566 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3567 *type = GL_UNSIGNED_SHORT_8_8_MESA;
3568 return true;
3569 case GL_BYTE:
3570 case GL_UNSIGNED_BYTE:
3571 /* format/types that are arrays of 8-bit values are unaffected by
3572 * swapBytes.
3573 */
3574 return true;
3575 default:
3576 /* swapping bytes on 4444, 1555, or >8 bit per channel types etc. will
3577 * never match a Mesa format.
3578 */
3579 return false;
3580 }
3581 }
3582
3583 /**
3584 * Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
3585 * GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
3586 * otherwise (for non-array formats).
3587 *
3588 * This function will typically be used to compute a mesa format from a GL type
3589 * so we can then call _mesa_format_convert. This function does
3590 * not consider byte swapping, so it returns types assuming that no byte
3591 * swapping is involved. If byte swapping is involved then clients are supposed
3592 * to handle that on their side before calling _mesa_format_convert.
3593 *
3594 * This function returns an uint32_t that can pack a mesa_format or a
3595 * mesa_array_format. Clients must check the mesa array format bit
3596 * (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
3597 * format is a mesa_array_format or a mesa_format.
3598 */
3599 uint32_t
_mesa_format_from_format_and_type(GLenum format,GLenum type)3600 _mesa_format_from_format_and_type(GLenum format, GLenum type)
3601 {
3602 bool is_array_format = true;
3603 uint8_t swizzle[4];
3604 bool normalized = false, is_float = false, is_signed = false;
3605 int num_channels = 0, type_size = 0;
3606
3607 if (format == GL_COLOR_INDEX)
3608 return MESA_FORMAT_NONE;
3609
3610 /* Extract array format type information from the OpenGL data type */
3611 switch (type) {
3612 case GL_UNSIGNED_BYTE:
3613 type_size = 1;
3614 break;
3615 case GL_BYTE:
3616 type_size = 1;
3617 is_signed = true;
3618 break;
3619 case GL_UNSIGNED_SHORT:
3620 type_size = 2;
3621 break;
3622 case GL_SHORT:
3623 type_size = 2;
3624 is_signed = true;
3625 break;
3626 case GL_UNSIGNED_INT:
3627 type_size = 4;
3628 break;
3629 case GL_INT:
3630 type_size = 4;
3631 is_signed = true;
3632 break;
3633 case GL_HALF_FLOAT:
3634 case GL_HALF_FLOAT_OES:
3635 type_size = 2;
3636 is_signed = true;
3637 is_float = true;
3638 break;
3639 case GL_FLOAT:
3640 type_size = 4;
3641 is_signed = true;
3642 is_float = true;
3643 break;
3644 default:
3645 is_array_format = false;
3646 break;
3647 }
3648
3649 /* Extract array format swizzle information from the OpenGL format */
3650 if (is_array_format)
3651 is_array_format = get_swizzle_from_gl_format(format, swizzle);
3652
3653 /* If this is an array format type after checking data type and format,
3654 * create the array format
3655 */
3656 if (is_array_format) {
3657 enum mesa_array_format_base_format bf;
3658 switch (format) {
3659 case GL_DEPTH_COMPONENT:
3660 bf = MESA_ARRAY_FORMAT_BASE_FORMAT_DEPTH;
3661 break;
3662 case GL_STENCIL_INDEX:
3663 bf = MESA_ARRAY_FORMAT_BASE_FORMAT_STENCIL;
3664 break;
3665 default:
3666 bf = MESA_ARRAY_FORMAT_BASE_FORMAT_RGBA_VARIANTS;
3667 break;
3668 }
3669
3670 normalized = !(_mesa_is_enum_format_integer(format) ||
3671 format == GL_STENCIL_INDEX);
3672 num_channels = _mesa_components_in_format(format);
3673
3674 return MESA_ARRAY_FORMAT(bf, type_size, is_signed, is_float,
3675 normalized, num_channels,
3676 swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
3677 }
3678
3679 /* Otherwise this is not an array format, so return the mesa_format
3680 * matching the OpenGL format and data type
3681 */
3682 switch (type) {
3683 case GL_UNSIGNED_SHORT_5_6_5:
3684 if (format == GL_RGB)
3685 return MESA_FORMAT_B5G6R5_UNORM;
3686 else if (format == GL_BGR)
3687 return MESA_FORMAT_R5G6B5_UNORM;
3688 else if (format == GL_RGB_INTEGER)
3689 return MESA_FORMAT_B5G6R5_UINT;
3690 break;
3691 case GL_UNSIGNED_SHORT_5_6_5_REV:
3692 if (format == GL_RGB)
3693 return MESA_FORMAT_R5G6B5_UNORM;
3694 else if (format == GL_BGR)
3695 return MESA_FORMAT_B5G6R5_UNORM;
3696 else if (format == GL_RGB_INTEGER)
3697 return MESA_FORMAT_R5G6B5_UINT;
3698 break;
3699 case GL_UNSIGNED_SHORT_4_4_4_4:
3700 if (format == GL_RGBA)
3701 return MESA_FORMAT_A4B4G4R4_UNORM;
3702 else if (format == GL_BGRA)
3703 return MESA_FORMAT_A4R4G4B4_UNORM;
3704 else if (format == GL_ABGR_EXT)
3705 return MESA_FORMAT_R4G4B4A4_UNORM;
3706 else if (format == GL_RGBA_INTEGER)
3707 return MESA_FORMAT_A4B4G4R4_UINT;
3708 else if (format == GL_BGRA_INTEGER)
3709 return MESA_FORMAT_A4R4G4B4_UINT;
3710 break;
3711 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3712 if (format == GL_RGBA)
3713 return MESA_FORMAT_R4G4B4A4_UNORM;
3714 else if (format == GL_BGRA)
3715 return MESA_FORMAT_B4G4R4A4_UNORM;
3716 else if (format == GL_ABGR_EXT)
3717 return MESA_FORMAT_A4B4G4R4_UNORM;
3718 else if (format == GL_RGBA_INTEGER)
3719 return MESA_FORMAT_R4G4B4A4_UINT;
3720 else if (format == GL_BGRA_INTEGER)
3721 return MESA_FORMAT_B4G4R4A4_UINT;
3722 break;
3723 case GL_UNSIGNED_SHORT_5_5_5_1:
3724 if (format == GL_RGBA)
3725 return MESA_FORMAT_A1B5G5R5_UNORM;
3726 else if (format == GL_BGRA)
3727 return MESA_FORMAT_A1R5G5B5_UNORM;
3728 else if (format == GL_RGBA_INTEGER)
3729 return MESA_FORMAT_A1B5G5R5_UINT;
3730 else if (format == GL_BGRA_INTEGER)
3731 return MESA_FORMAT_A1R5G5B5_UINT;
3732 break;
3733 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3734 if (format == GL_RGBA)
3735 return MESA_FORMAT_R5G5B5A1_UNORM;
3736 else if (format == GL_BGRA)
3737 return MESA_FORMAT_B5G5R5A1_UNORM;
3738 else if (format == GL_RGBA_INTEGER)
3739 return MESA_FORMAT_R5G5B5A1_UINT;
3740 else if (format == GL_BGRA_INTEGER)
3741 return MESA_FORMAT_B5G5R5A1_UINT;
3742 break;
3743 case GL_UNSIGNED_BYTE_3_3_2:
3744 if (format == GL_RGB)
3745 return MESA_FORMAT_B2G3R3_UNORM;
3746 else if (format == GL_RGB_INTEGER)
3747 return MESA_FORMAT_B2G3R3_UINT;
3748 break;
3749 case GL_UNSIGNED_BYTE_2_3_3_REV:
3750 if (format == GL_RGB)
3751 return MESA_FORMAT_R3G3B2_UNORM;
3752 else if (format == GL_RGB_INTEGER)
3753 return MESA_FORMAT_R3G3B2_UINT;
3754 break;
3755 case GL_UNSIGNED_INT_5_9_9_9_REV:
3756 if (format == GL_RGB)
3757 return MESA_FORMAT_R9G9B9E5_FLOAT;
3758 break;
3759 case GL_UNSIGNED_INT_10_10_10_2:
3760 if (format == GL_RGBA)
3761 return MESA_FORMAT_A2B10G10R10_UNORM;
3762 else if (format == GL_RGBA_INTEGER)
3763 return MESA_FORMAT_A2B10G10R10_UINT;
3764 else if (format == GL_BGRA)
3765 return MESA_FORMAT_A2R10G10B10_UNORM;
3766 else if (format == GL_BGRA_INTEGER)
3767 return MESA_FORMAT_A2R10G10B10_UINT;
3768 break;
3769 case GL_UNSIGNED_INT_2_10_10_10_REV:
3770 if (format == GL_RGB)
3771 return MESA_FORMAT_R10G10B10X2_UNORM;
3772 if (format == GL_RGBA)
3773 return MESA_FORMAT_R10G10B10A2_UNORM;
3774 else if (format == GL_RGBA_INTEGER)
3775 return MESA_FORMAT_R10G10B10A2_UINT;
3776 else if (format == GL_BGRA)
3777 return MESA_FORMAT_B10G10R10A2_UNORM;
3778 else if (format == GL_BGRA_INTEGER)
3779 return MESA_FORMAT_B10G10R10A2_UINT;
3780 break;
3781 case GL_UNSIGNED_INT_8_8_8_8:
3782 if (format == GL_RGBA)
3783 return MESA_FORMAT_A8B8G8R8_UNORM;
3784 else if (format == GL_BGRA)
3785 return MESA_FORMAT_A8R8G8B8_UNORM;
3786 else if (format == GL_ABGR_EXT)
3787 return MESA_FORMAT_R8G8B8A8_UNORM;
3788 else if (format == GL_RGBA_INTEGER)
3789 return MESA_FORMAT_A8B8G8R8_UINT;
3790 else if (format == GL_BGRA_INTEGER)
3791 return MESA_FORMAT_A8R8G8B8_UINT;
3792 break;
3793 case GL_UNSIGNED_INT_8_8_8_8_REV:
3794 if (format == GL_RGBA)
3795 return MESA_FORMAT_R8G8B8A8_UNORM;
3796 else if (format == GL_BGRA)
3797 return MESA_FORMAT_B8G8R8A8_UNORM;
3798 else if (format == GL_ABGR_EXT)
3799 return MESA_FORMAT_A8B8G8R8_UNORM;
3800 else if (format == GL_RGBA_INTEGER)
3801 return MESA_FORMAT_R8G8B8A8_UINT;
3802 else if (format == GL_BGRA_INTEGER)
3803 return MESA_FORMAT_B8G8R8A8_UINT;
3804 break;
3805 case GL_UNSIGNED_SHORT_8_8_MESA:
3806 if (format == GL_YCBCR_MESA)
3807 return MESA_FORMAT_YCBCR;
3808 break;
3809 case GL_UNSIGNED_SHORT_8_8_REV_MESA:
3810 if (format == GL_YCBCR_MESA)
3811 return MESA_FORMAT_YCBCR_REV;
3812 break;
3813 case GL_UNSIGNED_INT_10F_11F_11F_REV:
3814 if (format == GL_RGB)
3815 return MESA_FORMAT_R11G11B10_FLOAT;
3816 break;
3817 case GL_FLOAT:
3818 if (format == GL_DEPTH_COMPONENT)
3819 return MESA_FORMAT_Z_FLOAT32;
3820 break;
3821 case GL_UNSIGNED_INT:
3822 if (format == GL_DEPTH_COMPONENT)
3823 return MESA_FORMAT_Z_UNORM32;
3824 break;
3825 case GL_UNSIGNED_SHORT:
3826 if (format == GL_DEPTH_COMPONENT)
3827 return MESA_FORMAT_Z_UNORM16;
3828 break;
3829 case GL_UNSIGNED_INT_24_8:
3830 if (format == GL_DEPTH_STENCIL)
3831 return MESA_FORMAT_S8_UINT_Z24_UNORM;
3832 else if (format == GL_DEPTH_COMPONENT)
3833 return MESA_FORMAT_X8_UINT_Z24_UNORM;
3834 break;
3835 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
3836 if (format == GL_DEPTH_STENCIL)
3837 return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
3838 break;
3839 default:
3840 break;
3841 }
3842
3843 fprintf(stderr, "Unsupported format/type: %s/%s\n",
3844 _mesa_enum_to_string(format),
3845 _mesa_enum_to_string(type));
3846
3847 /* If we got here it means that we could not find a Mesa format that
3848 * matches the GL format/type provided. We may need to add a new Mesa
3849 * format in that case.
3850 */
3851 unreachable("Unsupported format");
3852 }
3853
3854 uint32_t
_mesa_tex_format_from_format_and_type(const struct gl_context * ctx,GLenum gl_format,GLenum type)3855 _mesa_tex_format_from_format_and_type(const struct gl_context *ctx,
3856 GLenum gl_format, GLenum type)
3857 {
3858 mesa_format format = _mesa_format_from_format_and_type(gl_format, type);
3859
3860 if (_mesa_format_is_mesa_array_format(format))
3861 format = _mesa_format_from_array_format(format);
3862
3863 if (format == MESA_FORMAT_NONE || !ctx->TextureFormatSupported[format])
3864 return MESA_FORMAT_NONE;
3865
3866 return format;
3867 }
3868
3869 /**
3870 * Returns true if \p internal_format is a sized internal format that
3871 * is marked "Color Renderable" in Table 8.10 of the ES 3.2 specification.
3872 */
3873 bool
_mesa_is_es3_color_renderable(const struct gl_context * ctx,GLenum internal_format)3874 _mesa_is_es3_color_renderable(const struct gl_context *ctx,
3875 GLenum internal_format)
3876 {
3877 switch (internal_format) {
3878 case GL_R8:
3879 case GL_RG8:
3880 case GL_RGB8:
3881 case GL_RGB565:
3882 case GL_RGBA4:
3883 case GL_RGB5_A1:
3884 case GL_RGBA8:
3885 case GL_RGB10_A2:
3886 case GL_RGB10_A2UI:
3887 case GL_SRGB8_ALPHA8:
3888 case GL_R16F:
3889 case GL_RG16F:
3890 case GL_RGBA16F:
3891 case GL_R32F:
3892 case GL_RG32F:
3893 case GL_RGBA32F:
3894 case GL_R11F_G11F_B10F:
3895 case GL_R8I:
3896 case GL_R8UI:
3897 case GL_R16I:
3898 case GL_R16UI:
3899 case GL_R32I:
3900 case GL_R32UI:
3901 case GL_RG8I:
3902 case GL_RG8UI:
3903 case GL_RG16I:
3904 case GL_RG16UI:
3905 case GL_RG32I:
3906 case GL_RG32UI:
3907 case GL_RGBA8I:
3908 case GL_RGBA8UI:
3909 case GL_RGBA16I:
3910 case GL_RGBA16UI:
3911 case GL_RGBA32I:
3912 case GL_RGBA32UI:
3913 return true;
3914 case GL_R16:
3915 case GL_RG16:
3916 case GL_RGBA16:
3917 return _mesa_has_EXT_texture_norm16(ctx);
3918 case GL_R8_SNORM:
3919 case GL_RG8_SNORM:
3920 case GL_RGBA8_SNORM:
3921 return _mesa_has_EXT_render_snorm(ctx);
3922 case GL_R16_SNORM:
3923 case GL_RG16_SNORM:
3924 case GL_RGBA16_SNORM:
3925 return _mesa_has_EXT_texture_norm16(ctx) &&
3926 _mesa_has_EXT_render_snorm(ctx);
3927 default:
3928 return false;
3929 }
3930 }
3931
3932 /**
3933 * Returns true if \p internal_format is a sized internal format that
3934 * is marked "Texture Filterable" in Table 8.10 of the ES 3.2 specification.
3935 */
3936 bool
_mesa_is_es3_texture_filterable(const struct gl_context * ctx,GLenum internal_format)3937 _mesa_is_es3_texture_filterable(const struct gl_context *ctx,
3938 GLenum internal_format)
3939 {
3940 switch (internal_format) {
3941 case GL_R8:
3942 case GL_R8_SNORM:
3943 case GL_RG8:
3944 case GL_RG8_SNORM:
3945 case GL_RGB8:
3946 case GL_RGB8_SNORM:
3947 case GL_RGB565:
3948 case GL_RGBA4:
3949 case GL_RGB5_A1:
3950 case GL_RGBA8:
3951 case GL_RGBA8_SNORM:
3952 case GL_RGB10_A2:
3953 case GL_SRGB8:
3954 case GL_SRGB8_ALPHA8:
3955 case GL_R16F:
3956 case GL_RG16F:
3957 case GL_RGB16F:
3958 case GL_RGBA16F:
3959 case GL_R11F_G11F_B10F:
3960 case GL_RGB9_E5:
3961 return true;
3962 case GL_R16:
3963 case GL_R16_SNORM:
3964 case GL_RG16:
3965 case GL_RG16_SNORM:
3966 case GL_RGB16:
3967 case GL_RGB16_SNORM:
3968 case GL_RGBA16:
3969 case GL_RGBA16_SNORM:
3970 return _mesa_has_EXT_texture_norm16(ctx);
3971 case GL_R32F:
3972 case GL_RG32F:
3973 case GL_RGB32F:
3974 case GL_RGBA32F:
3975 /* The OES_texture_float_linear spec says:
3976 *
3977 * "When implemented against OpenGL ES 3.0 or later versions, sized
3978 * 32-bit floating-point formats become texture-filterable. This
3979 * should be noted by, for example, checking the ``TF'' column of
3980 * table 8.13 in the ES 3.1 Specification (``Correspondence of sized
3981 * internal formats to base internal formats ... and use cases ...'')
3982 * for the R32F, RG32F, RGB32F, and RGBA32F formats."
3983 */
3984 return _mesa_has_OES_texture_float_linear(ctx);
3985 default:
3986 return false;
3987 }
3988 }
3989