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mesa/formats: refactor by collapsing cases in switch statement by type
[mesa.git] / src / mesa / main / formats.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (c) 2008-2009 VMware, Inc.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26
27 #include "imports.h"
28 #include "formats.h"
29 #include "macros.h"
30 #include "glformats.h"
31 #include "c11/threads.h"
32 #include "util/hash_table.h"
33
34 /**
35 * Information about texture formats.
36 */
37 struct gl_format_info
38 {
39 mesa_format Name;
40
41 /** text name for debugging */
42 const char *StrName;
43
44 enum mesa_format_layout Layout;
45
46 /**
47 * Base format is one of GL_RED, GL_RG, GL_RGB, GL_RGBA, GL_ALPHA,
48 * GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY, GL_YCBCR_MESA,
49 * GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
50 */
51 GLenum BaseFormat;
52
53 /**
54 * Logical data type: one of GL_UNSIGNED_NORMALIZED, GL_SIGNED_NORMALIZED,
55 * GL_UNSIGNED_INT, GL_INT, GL_FLOAT.
56 */
57 GLenum DataType;
58
59 GLubyte RedBits;
60 GLubyte GreenBits;
61 GLubyte BlueBits;
62 GLubyte AlphaBits;
63 GLubyte LuminanceBits;
64 GLubyte IntensityBits;
65 GLubyte DepthBits;
66 GLubyte StencilBits;
67
68 /**
69 * To describe compressed formats. If not compressed, Width=Height=1.
70 */
71 GLubyte BlockWidth, BlockHeight;
72 GLubyte BytesPerBlock;
73
74 uint8_t Swizzle[4];
75 mesa_array_format ArrayFormat;
76 };
77
78 #include "format_info.h"
79
80 static const struct gl_format_info *
81 _mesa_get_format_info(mesa_format format)
82 {
83 const struct gl_format_info *info = &format_info[format];
84 assert(info->Name == format);
85 return info;
86 }
87
88
89 /** Return string name of format (for debugging) */
90 const char *
91 _mesa_get_format_name(mesa_format format)
92 {
93 const struct gl_format_info *info = _mesa_get_format_info(format);
94 return info->StrName;
95 }
96
97
98
99 /**
100 * Return bytes needed to store a block of pixels in the given format.
101 * Normally, a block is 1x1 (a single pixel). But for compressed formats
102 * a block may be 4x4 or 8x4, etc.
103 *
104 * Note: not GLuint, so as not to coerce math to unsigned. cf. fdo #37351
105 */
106 GLint
107 _mesa_get_format_bytes(mesa_format format)
108 {
109 const struct gl_format_info *info = _mesa_get_format_info(format);
110 assert(info->BytesPerBlock);
111 assert(info->BytesPerBlock <= MAX_PIXEL_BYTES ||
112 _mesa_is_format_compressed(format));
113 return info->BytesPerBlock;
114 }
115
116
117 /**
118 * Return bits per component for the given format.
119 * \param format one of MESA_FORMAT_x
120 * \param pname the component, such as GL_RED_BITS, GL_TEXTURE_BLUE_BITS, etc.
121 */
122 GLint
123 _mesa_get_format_bits(mesa_format format, GLenum pname)
124 {
125 const struct gl_format_info *info = _mesa_get_format_info(format);
126
127 switch (pname) {
128 case GL_RED_BITS:
129 case GL_TEXTURE_RED_SIZE:
130 case GL_RENDERBUFFER_RED_SIZE_EXT:
131 case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
132 return info->RedBits;
133 case GL_GREEN_BITS:
134 case GL_TEXTURE_GREEN_SIZE:
135 case GL_RENDERBUFFER_GREEN_SIZE_EXT:
136 case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
137 return info->GreenBits;
138 case GL_BLUE_BITS:
139 case GL_TEXTURE_BLUE_SIZE:
140 case GL_RENDERBUFFER_BLUE_SIZE_EXT:
141 case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
142 return info->BlueBits;
143 case GL_ALPHA_BITS:
144 case GL_TEXTURE_ALPHA_SIZE:
145 case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
146 case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
147 return info->AlphaBits;
148 case GL_TEXTURE_INTENSITY_SIZE:
149 return info->IntensityBits;
150 case GL_TEXTURE_LUMINANCE_SIZE:
151 return info->LuminanceBits;
152 case GL_INDEX_BITS:
153 return 0;
154 case GL_DEPTH_BITS:
155 case GL_TEXTURE_DEPTH_SIZE_ARB:
156 case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
157 case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
158 return info->DepthBits;
159 case GL_STENCIL_BITS:
160 case GL_TEXTURE_STENCIL_SIZE_EXT:
161 case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
162 case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
163 return info->StencilBits;
164 default:
165 _mesa_problem(NULL, "bad pname in _mesa_get_format_bits()");
166 return 0;
167 }
168 }
169
170
171 GLuint
172 _mesa_get_format_max_bits(mesa_format format)
173 {
174 const struct gl_format_info *info = _mesa_get_format_info(format);
175 GLuint max = MAX2(info->RedBits, info->GreenBits);
176 max = MAX2(max, info->BlueBits);
177 max = MAX2(max, info->AlphaBits);
178 max = MAX2(max, info->LuminanceBits);
179 max = MAX2(max, info->IntensityBits);
180 max = MAX2(max, info->DepthBits);
181 max = MAX2(max, info->StencilBits);
182 return max;
183 }
184
185
186 /**
187 * Return the layout type of the given format.
188 * The return value will be one of:
189 * MESA_FORMAT_LAYOUT_ARRAY
190 * MESA_FORMAT_LAYOUT_PACKED
191 * MESA_FORMAT_LAYOUT_S3TC
192 * MESA_FORMAT_LAYOUT_RGTC
193 * MESA_FORMAT_LAYOUT_FXT1
194 * MESA_FORMAT_LAYOUT_ETC1
195 * MESA_FORMAT_LAYOUT_ETC2
196 * MESA_FORMAT_LAYOUT_BPTC
197 * MESA_FORMAT_LAYOUT_OTHER
198 */
199 extern enum mesa_format_layout
200 _mesa_get_format_layout(mesa_format format)
201 {
202 const struct gl_format_info *info = _mesa_get_format_info(format);
203 return info->Layout;
204 }
205
206
207 /**
208 * Return the data type (or more specifically, the data representation)
209 * for the given format.
210 * The return value will be one of:
211 * GL_UNSIGNED_NORMALIZED = unsigned int representing [0,1]
212 * GL_SIGNED_NORMALIZED = signed int representing [-1, 1]
213 * GL_UNSIGNED_INT = an ordinary unsigned integer
214 * GL_INT = an ordinary signed integer
215 * GL_FLOAT = an ordinary float
216 */
217 GLenum
218 _mesa_get_format_datatype(mesa_format format)
219 {
220 const struct gl_format_info *info = _mesa_get_format_info(format);
221 return info->DataType;
222 }
223
224 static GLenum
225 get_base_format_for_array_format(mesa_array_format format)
226 {
227 uint8_t swizzle[4];
228 int num_channels;
229
230 _mesa_array_format_get_swizzle(format, swizzle);
231 num_channels = _mesa_array_format_get_num_channels(format);
232
233 switch (num_channels) {
234 case 4:
235 /* FIXME: RGBX formats have 4 channels, but their base format is GL_RGB.
236 * This is not really a problem for now because we only create array
237 * formats from GL format/type combinations, and these cannot specify
238 * RGBX formats.
239 */
240 return GL_RGBA;
241 case 3:
242 return GL_RGB;
243 case 2:
244 if (swizzle[0] == 0 &&
245 swizzle[1] == 0 &&
246 swizzle[2] == 0 &&
247 swizzle[3] == 1)
248 return GL_LUMINANCE_ALPHA;
249 if (swizzle[0] == 1 &&
250 swizzle[1] == 1 &&
251 swizzle[2] == 1 &&
252 swizzle[3] == 0)
253 return GL_LUMINANCE_ALPHA;
254 if (swizzle[0] == 0 &&
255 swizzle[1] == 1 &&
256 swizzle[2] == 4 &&
257 swizzle[3] == 5)
258 return GL_RG;
259 if (swizzle[0] == 1 &&
260 swizzle[1] == 0 &&
261 swizzle[2] == 4 &&
262 swizzle[3] == 5)
263 return GL_RG;
264 break;
265 case 1:
266 if (swizzle[0] == 0 &&
267 swizzle[1] == 0 &&
268 swizzle[2] == 0 &&
269 swizzle[3] == 5)
270 return GL_LUMINANCE;
271 if (swizzle[0] == 0 &&
272 swizzle[1] == 0 &&
273 swizzle[2] == 0 &&
274 swizzle[3] == 0)
275 return GL_INTENSITY;
276 if (swizzle[0] <= MESA_FORMAT_SWIZZLE_W)
277 return GL_RED;
278 if (swizzle[1] <= MESA_FORMAT_SWIZZLE_W)
279 return GL_GREEN;
280 if (swizzle[2] <= MESA_FORMAT_SWIZZLE_W)
281 return GL_BLUE;
282 if (swizzle[3] <= MESA_FORMAT_SWIZZLE_W)
283 return GL_ALPHA;
284 break;
285 }
286
287 unreachable("Unsupported format");
288 }
289
290 /**
291 * Return the basic format for the given type. The result will be one of
292 * GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY,
293 * GL_YCBCR_MESA, GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
294 * This functions accepts a mesa_format or a mesa_array_format.
295 */
296 GLenum
297 _mesa_get_format_base_format(uint32_t format)
298 {
299 if (!_mesa_format_is_mesa_array_format(format)) {
300 const struct gl_format_info *info = _mesa_get_format_info(format);
301 return info->BaseFormat;
302 } else {
303 return get_base_format_for_array_format(format);
304 }
305 }
306
307
308 /**
309 * Return the block size (in pixels) for the given format. Normally
310 * the block size is 1x1. But compressed formats will have block sizes
311 * of 4x4 or 8x4 pixels, etc.
312 * \param bw returns block width in pixels
313 * \param bh returns block height in pixels
314 */
315 void
316 _mesa_get_format_block_size(mesa_format format, GLuint *bw, GLuint *bh)
317 {
318 const struct gl_format_info *info = _mesa_get_format_info(format);
319 *bw = info->BlockWidth;
320 *bh = info->BlockHeight;
321 }
322
323
324 /**
325 * Returns the an array of four numbers representing the transformation
326 * from the RGBA or SZ colorspace to the given format. For array formats,
327 * the i'th RGBA component is given by:
328 *
329 * if (swizzle[i] <= MESA_FORMAT_SWIZZLE_W)
330 * comp = data[swizzle[i]];
331 * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_ZERO)
332 * comp = 0;
333 * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_ONE)
334 * comp = 1;
335 * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_NONE)
336 * // data does not contain a channel of this format
337 *
338 * For packed formats, the swizzle gives the number of components left of
339 * the least significant bit.
340 *
341 * Compressed formats have no swizzle.
342 */
343 void
344 _mesa_get_format_swizzle(mesa_format format, uint8_t swizzle_out[4])
345 {
346 const struct gl_format_info *info = _mesa_get_format_info(format);
347 memcpy(swizzle_out, info->Swizzle, sizeof(info->Swizzle));
348 }
349
350 mesa_array_format
351 _mesa_array_format_flip_channels(mesa_array_format format)
352 {
353 int num_channels;
354 uint8_t swizzle[4];
355
356 num_channels = _mesa_array_format_get_num_channels(format);
357 _mesa_array_format_get_swizzle(format, swizzle);
358
359 if (num_channels == 1)
360 return format;
361
362 if (num_channels == 2) {
363 /* Assert that the swizzle makes sense for 2 channels */
364 for (unsigned i = 0; i < 4; i++)
365 assert(swizzle[i] != 2 && swizzle[i] != 3);
366
367 static const uint8_t flip_xy[6] = { 1, 0, 2, 3, 4, 5 };
368 _mesa_array_format_set_swizzle(&format,
369 flip_xy[swizzle[0]], flip_xy[swizzle[1]],
370 flip_xy[swizzle[2]], flip_xy[swizzle[3]]);
371 return format;
372 }
373
374 if (num_channels == 4) {
375 static const uint8_t flip[6] = { 3, 2, 1, 0, 4, 5 };
376 _mesa_array_format_set_swizzle(&format,
377 flip[swizzle[0]], flip[swizzle[1]],
378 flip[swizzle[2]], flip[swizzle[3]]);
379 return format;
380 }
381
382 unreachable("Invalid array format");
383 }
384
385 uint32_t
386 _mesa_format_to_array_format(mesa_format format)
387 {
388 const struct gl_format_info *info = _mesa_get_format_info(format);
389 if (info->ArrayFormat && !_mesa_little_endian() &&
390 info->Layout == MESA_FORMAT_LAYOUT_PACKED)
391 return _mesa_array_format_flip_channels(info->ArrayFormat);
392 else
393 return info->ArrayFormat;
394 }
395
396 static struct hash_table *format_array_format_table;
397 static once_flag format_array_format_table_exists = ONCE_FLAG_INIT;
398
399 static bool
400 array_formats_equal(const void *a, const void *b)
401 {
402 return (intptr_t)a == (intptr_t)b;
403 }
404
405 static void
406 format_array_format_table_init(void)
407 {
408 const struct gl_format_info *info;
409 mesa_array_format array_format;
410 unsigned f;
411
412 format_array_format_table = _mesa_hash_table_create(NULL, NULL,
413 array_formats_equal);
414
415 if (!format_array_format_table) {
416 _mesa_error_no_memory(__func__);
417 return;
418 }
419
420 for (f = 1; f < MESA_FORMAT_COUNT; ++f) {
421 info = _mesa_get_format_info(f);
422 if (!info->ArrayFormat)
423 continue;
424
425 if (_mesa_little_endian()) {
426 array_format = info->ArrayFormat;
427 } else {
428 array_format = _mesa_array_format_flip_channels(info->ArrayFormat);
429 }
430
431 /* This can happen and does for some of the BGR formats. Let's take
432 * the first one in the list.
433 */
434 if (_mesa_hash_table_search_pre_hashed(format_array_format_table,
435 array_format,
436 (void *)(intptr_t)array_format))
437 continue;
438
439 _mesa_hash_table_insert_pre_hashed(format_array_format_table,
440 array_format,
441 (void *)(intptr_t)array_format,
442 (void *)(intptr_t)f);
443 }
444 }
445
446 mesa_format
447 _mesa_format_from_array_format(uint32_t array_format)
448 {
449 struct hash_entry *entry;
450
451 assert(_mesa_format_is_mesa_array_format(array_format));
452
453 call_once(&format_array_format_table_exists, format_array_format_table_init);
454
455 if (!format_array_format_table) {
456 static const once_flag once_flag_init = ONCE_FLAG_INIT;
457 format_array_format_table_exists = once_flag_init;
458 return MESA_FORMAT_NONE;
459 }
460
461 entry = _mesa_hash_table_search_pre_hashed(format_array_format_table,
462 array_format,
463 (void *)(intptr_t)array_format);
464 if (entry)
465 return (intptr_t)entry->data;
466 else
467 return MESA_FORMAT_NONE;
468 }
469
470 /** Is the given format a compressed format? */
471 GLboolean
472 _mesa_is_format_compressed(mesa_format format)
473 {
474 const struct gl_format_info *info = _mesa_get_format_info(format);
475 return info->BlockWidth > 1 || info->BlockHeight > 1;
476 }
477
478
479 /**
480 * Determine if the given format represents a packed depth/stencil buffer.
481 */
482 GLboolean
483 _mesa_is_format_packed_depth_stencil(mesa_format format)
484 {
485 const struct gl_format_info *info = _mesa_get_format_info(format);
486
487 return info->BaseFormat == GL_DEPTH_STENCIL;
488 }
489
490
491 /**
492 * Is the given format a signed/unsigned integer color format?
493 */
494 GLboolean
495 _mesa_is_format_integer_color(mesa_format format)
496 {
497 const struct gl_format_info *info = _mesa_get_format_info(format);
498 return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT) &&
499 info->BaseFormat != GL_DEPTH_COMPONENT &&
500 info->BaseFormat != GL_DEPTH_STENCIL &&
501 info->BaseFormat != GL_STENCIL_INDEX;
502 }
503
504
505 /**
506 * Is the given format an unsigned integer format?
507 */
508 GLboolean
509 _mesa_is_format_unsigned(mesa_format format)
510 {
511 const struct gl_format_info *info = _mesa_get_format_info(format);
512 return _mesa_is_type_unsigned(info->DataType);
513 }
514
515
516 /**
517 * Does the given format store signed values?
518 */
519 GLboolean
520 _mesa_is_format_signed(mesa_format format)
521 {
522 if (format == MESA_FORMAT_R11G11B10_FLOAT ||
523 format == MESA_FORMAT_R9G9B9E5_FLOAT) {
524 /* these packed float formats only store unsigned values */
525 return GL_FALSE;
526 }
527 else {
528 const struct gl_format_info *info = _mesa_get_format_info(format);
529 return (info->DataType == GL_SIGNED_NORMALIZED ||
530 info->DataType == GL_INT ||
531 info->DataType == GL_FLOAT);
532 }
533 }
534
535 /**
536 * Is the given format an integer format?
537 */
538 GLboolean
539 _mesa_is_format_integer(mesa_format format)
540 {
541 const struct gl_format_info *info = _mesa_get_format_info(format);
542 return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT);
543 }
544
545
546 /**
547 * Return true if the given format is a color format.
548 */
549 GLenum
550 _mesa_is_format_color_format(mesa_format format)
551 {
552 const struct gl_format_info *info = _mesa_get_format_info(format);
553 switch (info->BaseFormat) {
554 case GL_DEPTH_COMPONENT:
555 case GL_STENCIL_INDEX:
556 case GL_DEPTH_STENCIL:
557 return false;
558 default:
559 return true;
560 }
561 }
562
563
564 /**
565 * Return color encoding for given format.
566 * \return GL_LINEAR or GL_SRGB
567 */
568 GLenum
569 _mesa_get_format_color_encoding(mesa_format format)
570 {
571 /* XXX this info should be encoded in gl_format_info */
572 switch (format) {
573 case MESA_FORMAT_BGR_SRGB8:
574 case MESA_FORMAT_A8B8G8R8_SRGB:
575 case MESA_FORMAT_B8G8R8A8_SRGB:
576 case MESA_FORMAT_A8R8G8B8_SRGB:
577 case MESA_FORMAT_R8G8B8A8_SRGB:
578 case MESA_FORMAT_L_SRGB8:
579 case MESA_FORMAT_L8A8_SRGB:
580 case MESA_FORMAT_A8L8_SRGB:
581 case MESA_FORMAT_SRGB_DXT1:
582 case MESA_FORMAT_SRGBA_DXT1:
583 case MESA_FORMAT_SRGBA_DXT3:
584 case MESA_FORMAT_SRGBA_DXT5:
585 case MESA_FORMAT_R8G8B8X8_SRGB:
586 case MESA_FORMAT_ETC2_SRGB8:
587 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
588 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
589 case MESA_FORMAT_B8G8R8X8_SRGB:
590 case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
591 return GL_SRGB;
592 default:
593 return GL_LINEAR;
594 }
595 }
596
597
598 /**
599 * Return TRUE if format is an ETC2 compressed format specified
600 * by GL_ARB_ES3_compatibility.
601 */
602 bool
603 _mesa_is_format_etc2(mesa_format format)
604 {
605 switch (format) {
606 case MESA_FORMAT_ETC2_RGB8:
607 case MESA_FORMAT_ETC2_SRGB8:
608 case MESA_FORMAT_ETC2_RGBA8_EAC:
609 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
610 case MESA_FORMAT_ETC2_R11_EAC:
611 case MESA_FORMAT_ETC2_RG11_EAC:
612 case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
613 case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
614 case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
615 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
616 return GL_TRUE;
617 default:
618 return GL_FALSE;
619 }
620 }
621
622
623 /**
624 * For an sRGB format, return the corresponding linear color space format.
625 * For non-sRGB formats, return the format as-is.
626 */
627 mesa_format
628 _mesa_get_srgb_format_linear(mesa_format format)
629 {
630 switch (format) {
631 case MESA_FORMAT_BGR_SRGB8:
632 format = MESA_FORMAT_BGR_UNORM8;
633 break;
634 case MESA_FORMAT_A8B8G8R8_SRGB:
635 format = MESA_FORMAT_A8B8G8R8_UNORM;
636 break;
637 case MESA_FORMAT_B8G8R8A8_SRGB:
638 format = MESA_FORMAT_B8G8R8A8_UNORM;
639 break;
640 case MESA_FORMAT_A8R8G8B8_SRGB:
641 format = MESA_FORMAT_A8R8G8B8_UNORM;
642 break;
643 case MESA_FORMAT_R8G8B8A8_SRGB:
644 format = MESA_FORMAT_R8G8B8A8_UNORM;
645 break;
646 case MESA_FORMAT_L_SRGB8:
647 format = MESA_FORMAT_L_UNORM8;
648 break;
649 case MESA_FORMAT_L8A8_SRGB:
650 format = MESA_FORMAT_L8A8_UNORM;
651 break;
652 case MESA_FORMAT_A8L8_SRGB:
653 format = MESA_FORMAT_A8L8_UNORM;
654 break;
655 case MESA_FORMAT_SRGB_DXT1:
656 format = MESA_FORMAT_RGB_DXT1;
657 break;
658 case MESA_FORMAT_SRGBA_DXT1:
659 format = MESA_FORMAT_RGBA_DXT1;
660 break;
661 case MESA_FORMAT_SRGBA_DXT3:
662 format = MESA_FORMAT_RGBA_DXT3;
663 break;
664 case MESA_FORMAT_SRGBA_DXT5:
665 format = MESA_FORMAT_RGBA_DXT5;
666 break;
667 case MESA_FORMAT_R8G8B8X8_SRGB:
668 format = MESA_FORMAT_R8G8B8X8_UNORM;
669 break;
670 case MESA_FORMAT_X8B8G8R8_SRGB:
671 format = MESA_FORMAT_X8B8G8R8_UNORM;
672 break;
673 case MESA_FORMAT_ETC2_SRGB8:
674 format = MESA_FORMAT_ETC2_RGB8;
675 break;
676 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
677 format = MESA_FORMAT_ETC2_RGBA8_EAC;
678 break;
679 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
680 format = MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1;
681 break;
682 case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
683 format = MESA_FORMAT_BPTC_RGBA_UNORM;
684 break;
685 case MESA_FORMAT_B8G8R8X8_SRGB:
686 format = MESA_FORMAT_B8G8R8X8_UNORM;
687 break;
688 case MESA_FORMAT_X8R8G8B8_SRGB:
689 format = MESA_FORMAT_X8R8G8B8_UNORM;
690 break;
691 default:
692 break;
693 }
694 return format;
695 }
696
697
698 /**
699 * If the given format is a compressed format, return a corresponding
700 * uncompressed format.
701 */
702 mesa_format
703 _mesa_get_uncompressed_format(mesa_format format)
704 {
705 switch (format) {
706 case MESA_FORMAT_RGB_FXT1:
707 return MESA_FORMAT_BGR_UNORM8;
708 case MESA_FORMAT_RGBA_FXT1:
709 return MESA_FORMAT_A8B8G8R8_UNORM;
710 case MESA_FORMAT_RGB_DXT1:
711 case MESA_FORMAT_SRGB_DXT1:
712 return MESA_FORMAT_BGR_UNORM8;
713 case MESA_FORMAT_RGBA_DXT1:
714 case MESA_FORMAT_SRGBA_DXT1:
715 return MESA_FORMAT_A8B8G8R8_UNORM;
716 case MESA_FORMAT_RGBA_DXT3:
717 case MESA_FORMAT_SRGBA_DXT3:
718 return MESA_FORMAT_A8B8G8R8_UNORM;
719 case MESA_FORMAT_RGBA_DXT5:
720 case MESA_FORMAT_SRGBA_DXT5:
721 return MESA_FORMAT_A8B8G8R8_UNORM;
722 case MESA_FORMAT_R_RGTC1_UNORM:
723 return MESA_FORMAT_R_UNORM8;
724 case MESA_FORMAT_R_RGTC1_SNORM:
725 return MESA_FORMAT_R_SNORM8;
726 case MESA_FORMAT_RG_RGTC2_UNORM:
727 return MESA_FORMAT_R8G8_UNORM;
728 case MESA_FORMAT_RG_RGTC2_SNORM:
729 return MESA_FORMAT_R8G8_SNORM;
730 case MESA_FORMAT_L_LATC1_UNORM:
731 return MESA_FORMAT_L_UNORM8;
732 case MESA_FORMAT_L_LATC1_SNORM:
733 return MESA_FORMAT_L_SNORM8;
734 case MESA_FORMAT_LA_LATC2_UNORM:
735 return MESA_FORMAT_L8A8_UNORM;
736 case MESA_FORMAT_LA_LATC2_SNORM:
737 return MESA_FORMAT_L8A8_SNORM;
738 case MESA_FORMAT_ETC1_RGB8:
739 case MESA_FORMAT_ETC2_RGB8:
740 case MESA_FORMAT_ETC2_SRGB8:
741 return MESA_FORMAT_BGR_UNORM8;
742 case MESA_FORMAT_ETC2_RGBA8_EAC:
743 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
744 case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
745 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
746 return MESA_FORMAT_A8B8G8R8_UNORM;
747 case MESA_FORMAT_ETC2_R11_EAC:
748 case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
749 return MESA_FORMAT_R_UNORM16;
750 case MESA_FORMAT_ETC2_RG11_EAC:
751 case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
752 return MESA_FORMAT_R16G16_UNORM;
753 case MESA_FORMAT_BPTC_RGBA_UNORM:
754 case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
755 return MESA_FORMAT_A8B8G8R8_UNORM;
756 case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
757 case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
758 return MESA_FORMAT_RGB_FLOAT32;
759 default:
760 #ifdef DEBUG
761 assert(!_mesa_is_format_compressed(format));
762 #endif
763 return format;
764 }
765 }
766
767
768 GLuint
769 _mesa_format_num_components(mesa_format format)
770 {
771 const struct gl_format_info *info = _mesa_get_format_info(format);
772 return ((info->RedBits > 0) +
773 (info->GreenBits > 0) +
774 (info->BlueBits > 0) +
775 (info->AlphaBits > 0) +
776 (info->LuminanceBits > 0) +
777 (info->IntensityBits > 0) +
778 (info->DepthBits > 0) +
779 (info->StencilBits > 0));
780 }
781
782
783 /**
784 * Returns true if a color format has data stored in the R/G/B/A channels,
785 * given an index from 0 to 3.
786 */
787 bool
788 _mesa_format_has_color_component(mesa_format format, int component)
789 {
790 const struct gl_format_info *info = _mesa_get_format_info(format);
791
792 assert(info->BaseFormat != GL_DEPTH_COMPONENT &&
793 info->BaseFormat != GL_DEPTH_STENCIL &&
794 info->BaseFormat != GL_STENCIL_INDEX);
795
796 switch (component) {
797 case 0:
798 return (info->RedBits + info->IntensityBits + info->LuminanceBits) > 0;
799 case 1:
800 return (info->GreenBits + info->IntensityBits + info->LuminanceBits) > 0;
801 case 2:
802 return (info->BlueBits + info->IntensityBits + info->LuminanceBits) > 0;
803 case 3:
804 return (info->AlphaBits + info->IntensityBits) > 0;
805 default:
806 assert(!"Invalid color component: must be 0..3");
807 return false;
808 }
809 }
810
811
812 /**
813 * Return number of bytes needed to store an image of the given size
814 * in the given format.
815 */
816 GLuint
817 _mesa_format_image_size(mesa_format format, GLsizei width,
818 GLsizei height, GLsizei depth)
819 {
820 const struct gl_format_info *info = _mesa_get_format_info(format);
821 /* Strictly speaking, a conditional isn't needed here */
822 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
823 /* compressed format (2D only for now) */
824 const GLuint bw = info->BlockWidth, bh = info->BlockHeight;
825 const GLuint wblocks = (width + bw - 1) / bw;
826 const GLuint hblocks = (height + bh - 1) / bh;
827 const GLuint sz = wblocks * hblocks * info->BytesPerBlock;
828 return sz * depth;
829 }
830 else {
831 /* non-compressed */
832 const GLuint sz = width * height * depth * info->BytesPerBlock;
833 return sz;
834 }
835 }
836
837
838 /**
839 * Same as _mesa_format_image_size() but returns a 64-bit value to
840 * accommodate very large textures.
841 */
842 uint64_t
843 _mesa_format_image_size64(mesa_format format, GLsizei width,
844 GLsizei height, GLsizei depth)
845 {
846 const struct gl_format_info *info = _mesa_get_format_info(format);
847 /* Strictly speaking, a conditional isn't needed here */
848 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
849 /* compressed format (2D only for now) */
850 const uint64_t bw = info->BlockWidth, bh = info->BlockHeight;
851 const uint64_t wblocks = (width + bw - 1) / bw;
852 const uint64_t hblocks = (height + bh - 1) / bh;
853 const uint64_t sz = wblocks * hblocks * info->BytesPerBlock;
854 return sz * depth;
855 }
856 else {
857 /* non-compressed */
858 const uint64_t sz = ((uint64_t) width *
859 (uint64_t) height *
860 (uint64_t) depth *
861 info->BytesPerBlock);
862 return sz;
863 }
864 }
865
866
867
868 GLint
869 _mesa_format_row_stride(mesa_format format, GLsizei width)
870 {
871 const struct gl_format_info *info = _mesa_get_format_info(format);
872 /* Strictly speaking, a conditional isn't needed here */
873 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
874 /* compressed format */
875 const GLuint bw = info->BlockWidth;
876 const GLuint wblocks = (width + bw - 1) / bw;
877 const GLint stride = wblocks * info->BytesPerBlock;
878 return stride;
879 }
880 else {
881 const GLint stride = width * info->BytesPerBlock;
882 return stride;
883 }
884 }
885
886
887 /**
888 * Debug/test: check that all formats are handled in the
889 * _mesa_format_to_type_and_comps() function. When new pixel formats
890 * are added to Mesa, that function needs to be updated.
891 * This is a no-op after the first call.
892 */
893 static void
894 check_format_to_type_and_comps(void)
895 {
896 mesa_format f;
897
898 for (f = MESA_FORMAT_NONE + 1; f < MESA_FORMAT_COUNT; f++) {
899 GLenum datatype = 0;
900 GLuint comps = 0;
901 /* This function will emit a problem/warning if the format is
902 * not handled.
903 */
904 _mesa_format_to_type_and_comps(f, &datatype, &comps);
905 }
906 }
907
908 /**
909 * Do sanity checking of the format info table.
910 */
911 void
912 _mesa_test_formats(void)
913 {
914 GLuint i;
915
916 STATIC_ASSERT(ARRAY_SIZE(format_info) == MESA_FORMAT_COUNT);
917
918 for (i = 0; i < MESA_FORMAT_COUNT; i++) {
919 const struct gl_format_info *info = _mesa_get_format_info(i);
920 assert(info);
921
922 assert(info->Name == i);
923
924 if (info->Name == MESA_FORMAT_NONE)
925 continue;
926
927 if (info->BlockWidth == 1 && info->BlockHeight == 1) {
928 if (info->RedBits > 0) {
929 GLuint t = info->RedBits + info->GreenBits
930 + info->BlueBits + info->AlphaBits;
931 assert(t / 8 <= info->BytesPerBlock);
932 (void) t;
933 }
934 }
935
936 assert(info->DataType == GL_UNSIGNED_NORMALIZED ||
937 info->DataType == GL_SIGNED_NORMALIZED ||
938 info->DataType == GL_UNSIGNED_INT ||
939 info->DataType == GL_INT ||
940 info->DataType == GL_FLOAT ||
941 /* Z32_FLOAT_X24S8 has DataType of GL_NONE */
942 info->DataType == GL_NONE);
943
944 if (info->BaseFormat == GL_RGB) {
945 assert(info->RedBits > 0);
946 assert(info->GreenBits > 0);
947 assert(info->BlueBits > 0);
948 assert(info->AlphaBits == 0);
949 assert(info->LuminanceBits == 0);
950 assert(info->IntensityBits == 0);
951 }
952 else if (info->BaseFormat == GL_RGBA) {
953 assert(info->RedBits > 0);
954 assert(info->GreenBits > 0);
955 assert(info->BlueBits > 0);
956 assert(info->AlphaBits > 0);
957 assert(info->LuminanceBits == 0);
958 assert(info->IntensityBits == 0);
959 }
960 else if (info->BaseFormat == GL_RG) {
961 assert(info->RedBits > 0);
962 assert(info->GreenBits > 0);
963 assert(info->BlueBits == 0);
964 assert(info->AlphaBits == 0);
965 assert(info->LuminanceBits == 0);
966 assert(info->IntensityBits == 0);
967 }
968 else if (info->BaseFormat == GL_RED) {
969 assert(info->RedBits > 0);
970 assert(info->GreenBits == 0);
971 assert(info->BlueBits == 0);
972 assert(info->AlphaBits == 0);
973 assert(info->LuminanceBits == 0);
974 assert(info->IntensityBits == 0);
975 }
976 else if (info->BaseFormat == GL_LUMINANCE) {
977 assert(info->RedBits == 0);
978 assert(info->GreenBits == 0);
979 assert(info->BlueBits == 0);
980 assert(info->AlphaBits == 0);
981 assert(info->LuminanceBits > 0);
982 assert(info->IntensityBits == 0);
983 }
984 else if (info->BaseFormat == GL_INTENSITY) {
985 assert(info->RedBits == 0);
986 assert(info->GreenBits == 0);
987 assert(info->BlueBits == 0);
988 assert(info->AlphaBits == 0);
989 assert(info->LuminanceBits == 0);
990 assert(info->IntensityBits > 0);
991 }
992 }
993
994 check_format_to_type_and_comps();
995 }
996
997
998
999 /**
1000 * Return datatype and number of components per texel for the given mesa_format.
1001 * Only used for mipmap generation code.
1002 */
1003 void
1004 _mesa_format_to_type_and_comps(mesa_format format,
1005 GLenum *datatype, GLuint *comps)
1006 {
1007 switch (format) {
1008 case MESA_FORMAT_A8B8G8R8_UNORM:
1009 case MESA_FORMAT_R8G8B8A8_UNORM:
1010 case MESA_FORMAT_B8G8R8A8_UNORM:
1011 case MESA_FORMAT_A8R8G8B8_UNORM:
1012 case MESA_FORMAT_X8B8G8R8_UNORM:
1013 case MESA_FORMAT_R8G8B8X8_UNORM:
1014 case MESA_FORMAT_B8G8R8X8_UNORM:
1015 case MESA_FORMAT_X8R8G8B8_UNORM:
1016 case MESA_FORMAT_BGR_UNORM8:
1017 case MESA_FORMAT_RGB_UNORM8:
1018 *datatype = GL_UNSIGNED_BYTE;
1019 *comps = _mesa_format_num_components(format);
1020 return;
1021 case MESA_FORMAT_B5G6R5_UNORM:
1022 case MESA_FORMAT_R5G6B5_UNORM:
1023 *datatype = GL_UNSIGNED_SHORT_5_6_5;
1024 *comps = 3;
1025 return;
1026
1027 case MESA_FORMAT_B4G4R4A4_UNORM:
1028 case MESA_FORMAT_A4R4G4B4_UNORM:
1029 case MESA_FORMAT_B4G4R4X4_UNORM:
1030 *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1031 *comps = 4;
1032 return;
1033
1034 case MESA_FORMAT_B5G5R5A1_UNORM:
1035 case MESA_FORMAT_A1R5G5B5_UNORM:
1036 case MESA_FORMAT_B5G5R5X1_UNORM:
1037 *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
1038 *comps = 4;
1039 return;
1040
1041 case MESA_FORMAT_B10G10R10A2_UNORM:
1042 *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1043 *comps = 4;
1044 return;
1045
1046 case MESA_FORMAT_A1B5G5R5_UNORM:
1047 *datatype = GL_UNSIGNED_SHORT_5_5_5_1;
1048 *comps = 4;
1049 return;
1050
1051 case MESA_FORMAT_L4A4_UNORM:
1052 *datatype = MESA_UNSIGNED_BYTE_4_4;
1053 *comps = 2;
1054 return;
1055
1056 case MESA_FORMAT_L8A8_UNORM:
1057 case MESA_FORMAT_A8L8_UNORM:
1058 case MESA_FORMAT_R8G8_UNORM:
1059 case MESA_FORMAT_G8R8_UNORM:
1060 *datatype = GL_UNSIGNED_BYTE;
1061 *comps = 2;
1062 return;
1063
1064 case MESA_FORMAT_L16A16_UNORM:
1065 case MESA_FORMAT_A16L16_UNORM:
1066 case MESA_FORMAT_R16G16_UNORM:
1067 case MESA_FORMAT_G16R16_UNORM:
1068 case MESA_FORMAT_R_UNORM16:
1069 case MESA_FORMAT_A_UNORM16:
1070 case MESA_FORMAT_L_UNORM16:
1071 case MESA_FORMAT_I_UNORM16:
1072 *datatype = GL_UNSIGNED_SHORT;
1073 *comps = _mesa_format_num_components(format);
1074 return;
1075
1076 case MESA_FORMAT_R3G3B2_UNORM:
1077 *datatype = GL_UNSIGNED_BYTE_2_3_3_REV;
1078 *comps = 3;
1079 return;
1080 case MESA_FORMAT_A4B4G4R4_UNORM:
1081 case MESA_FORMAT_R4G4B4A4_UNORM:
1082 *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1083 *comps = 4;
1084 return;
1085 case MESA_FORMAT_R5G5B5A1_UNORM:
1086 *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
1087 *comps = 4;
1088 return;
1089 case MESA_FORMAT_A2B10G10R10_UNORM:
1090 case MESA_FORMAT_A2B10G10R10_UINT:
1091 case MESA_FORMAT_A2R10G10B10_UNORM:
1092 case MESA_FORMAT_A2R10G10B10_UINT:
1093 *datatype = GL_UNSIGNED_INT_10_10_10_2;
1094 *comps = 4;
1095 return;
1096
1097 case MESA_FORMAT_B2G3R3_UNORM:
1098 *datatype = GL_UNSIGNED_BYTE_3_3_2;
1099 *comps = 3;
1100 return;
1101
1102 case MESA_FORMAT_A_UNORM8:
1103 case MESA_FORMAT_L_UNORM8:
1104 case MESA_FORMAT_I_UNORM8:
1105 case MESA_FORMAT_R_UNORM8:
1106 case MESA_FORMAT_S_UINT8:
1107 *datatype = GL_UNSIGNED_BYTE;
1108 *comps = 1;
1109 return;
1110
1111 case MESA_FORMAT_YCBCR:
1112 case MESA_FORMAT_YCBCR_REV:
1113 *datatype = GL_UNSIGNED_SHORT;
1114 *comps = 2;
1115 return;
1116
1117 case MESA_FORMAT_S8_UINT_Z24_UNORM:
1118 *datatype = GL_UNSIGNED_INT_24_8_MESA;
1119 *comps = 2;
1120 return;
1121
1122 case MESA_FORMAT_Z24_UNORM_S8_UINT:
1123 *datatype = GL_UNSIGNED_INT_8_24_REV_MESA;
1124 *comps = 2;
1125 return;
1126
1127 case MESA_FORMAT_Z_UNORM16:
1128 *datatype = GL_UNSIGNED_SHORT;
1129 *comps = 1;
1130 return;
1131
1132 case MESA_FORMAT_Z24_UNORM_X8_UINT:
1133 case MESA_FORMAT_X8_UINT_Z24_UNORM:
1134 case MESA_FORMAT_Z_UNORM32:
1135 *datatype = GL_UNSIGNED_INT;
1136 *comps = 1;
1137 return;
1138
1139 case MESA_FORMAT_Z_FLOAT32:
1140 *datatype = GL_FLOAT;
1141 *comps = 1;
1142 return;
1143
1144 case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
1145 *datatype = GL_FLOAT_32_UNSIGNED_INT_24_8_REV;
1146 *comps = 1;
1147 return;
1148
1149 case MESA_FORMAT_R_SNORM8:
1150 case MESA_FORMAT_A_SNORM8:
1151 case MESA_FORMAT_L_SNORM8:
1152 case MESA_FORMAT_I_SNORM8:
1153 case MESA_FORMAT_R8G8_SNORM:
1154 case MESA_FORMAT_L8A8_SNORM:
1155 case MESA_FORMAT_A8L8_SNORM:
1156 case MESA_FORMAT_A8B8G8R8_SNORM:
1157 case MESA_FORMAT_R8G8B8A8_SNORM:
1158 case MESA_FORMAT_X8B8G8R8_SNORM:
1159 *datatype = GL_BYTE;
1160 *comps = _mesa_format_num_components(format);
1161 return;
1162
1163 case MESA_FORMAT_RGBA_UNORM16:
1164 *datatype = GL_UNSIGNED_SHORT;
1165 *comps = 4;
1166 return;
1167
1168 case MESA_FORMAT_R_SNORM16:
1169 case MESA_FORMAT_A_SNORM16:
1170 case MESA_FORMAT_L_SNORM16:
1171 case MESA_FORMAT_I_SNORM16:
1172 case MESA_FORMAT_R16G16_SNORM:
1173 case MESA_FORMAT_LA_SNORM16:
1174 case MESA_FORMAT_RGB_SNORM16:
1175 case MESA_FORMAT_RGBA_SNORM16:
1176 *datatype = GL_SHORT;
1177 *comps = _mesa_format_num_components(format);
1178 return;
1179
1180 case MESA_FORMAT_BGR_SRGB8:
1181 case MESA_FORMAT_A8B8G8R8_SRGB:
1182 case MESA_FORMAT_B8G8R8A8_SRGB:
1183 case MESA_FORMAT_A8R8G8B8_SRGB:
1184 case MESA_FORMAT_R8G8B8A8_SRGB:
1185 case MESA_FORMAT_L_SRGB8:
1186 case MESA_FORMAT_L8A8_SRGB:
1187 case MESA_FORMAT_A8L8_SRGB:
1188 *datatype = GL_UNSIGNED_BYTE;
1189 *comps = _mesa_format_num_components(format);
1190 return;
1191
1192 case MESA_FORMAT_RGB_FXT1:
1193 case MESA_FORMAT_RGBA_FXT1:
1194 case MESA_FORMAT_RGB_DXT1:
1195 case MESA_FORMAT_RGBA_DXT1:
1196 case MESA_FORMAT_RGBA_DXT3:
1197 case MESA_FORMAT_RGBA_DXT5:
1198 case MESA_FORMAT_SRGB_DXT1:
1199 case MESA_FORMAT_SRGBA_DXT1:
1200 case MESA_FORMAT_SRGBA_DXT3:
1201 case MESA_FORMAT_SRGBA_DXT5:
1202 case MESA_FORMAT_R_RGTC1_UNORM:
1203 case MESA_FORMAT_R_RGTC1_SNORM:
1204 case MESA_FORMAT_RG_RGTC2_UNORM:
1205 case MESA_FORMAT_RG_RGTC2_SNORM:
1206 case MESA_FORMAT_L_LATC1_UNORM:
1207 case MESA_FORMAT_L_LATC1_SNORM:
1208 case MESA_FORMAT_LA_LATC2_UNORM:
1209 case MESA_FORMAT_LA_LATC2_SNORM:
1210 case MESA_FORMAT_ETC1_RGB8:
1211 case MESA_FORMAT_ETC2_RGB8:
1212 case MESA_FORMAT_ETC2_SRGB8:
1213 case MESA_FORMAT_ETC2_RGBA8_EAC:
1214 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
1215 case MESA_FORMAT_ETC2_R11_EAC:
1216 case MESA_FORMAT_ETC2_RG11_EAC:
1217 case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
1218 case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
1219 case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
1220 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
1221 case MESA_FORMAT_BPTC_RGBA_UNORM:
1222 case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
1223 case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
1224 case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
1225 /* XXX generate error instead? */
1226 *datatype = GL_UNSIGNED_BYTE;
1227 *comps = 0;
1228 return;
1229
1230 case MESA_FORMAT_RGBA_FLOAT32:
1231 *datatype = GL_FLOAT;
1232 *comps = 4;
1233 return;
1234 case MESA_FORMAT_RGBA_FLOAT16:
1235 *datatype = GL_HALF_FLOAT_ARB;
1236 *comps = 4;
1237 return;
1238 case MESA_FORMAT_RGB_FLOAT32:
1239 *datatype = GL_FLOAT;
1240 *comps = 3;
1241 return;
1242 case MESA_FORMAT_RGB_FLOAT16:
1243 *datatype = GL_HALF_FLOAT_ARB;
1244 *comps = 3;
1245 return;
1246 case MESA_FORMAT_LA_FLOAT32:
1247 case MESA_FORMAT_RG_FLOAT32:
1248 *datatype = GL_FLOAT;
1249 *comps = 2;
1250 return;
1251 case MESA_FORMAT_LA_FLOAT16:
1252 case MESA_FORMAT_RG_FLOAT16:
1253 *datatype = GL_HALF_FLOAT_ARB;
1254 *comps = 2;
1255 return;
1256 case MESA_FORMAT_A_FLOAT32:
1257 case MESA_FORMAT_L_FLOAT32:
1258 case MESA_FORMAT_I_FLOAT32:
1259 case MESA_FORMAT_R_FLOAT32:
1260 *datatype = GL_FLOAT;
1261 *comps = 1;
1262 return;
1263 case MESA_FORMAT_A_FLOAT16:
1264 case MESA_FORMAT_L_FLOAT16:
1265 case MESA_FORMAT_I_FLOAT16:
1266 case MESA_FORMAT_R_FLOAT16:
1267 *datatype = GL_HALF_FLOAT_ARB;
1268 *comps = 1;
1269 return;
1270
1271 case MESA_FORMAT_A_UINT8:
1272 case MESA_FORMAT_L_UINT8:
1273 case MESA_FORMAT_I_UINT8:
1274 case MESA_FORMAT_LA_UINT8:
1275 *datatype = GL_UNSIGNED_BYTE;
1276 *comps = _mesa_format_num_components(format);
1277 return;
1278
1279 case MESA_FORMAT_A_UINT16:
1280 case MESA_FORMAT_L_UINT16:
1281 case MESA_FORMAT_I_UINT16:
1282 case MESA_FORMAT_LA_UINT16:
1283 *datatype = GL_UNSIGNED_SHORT;
1284 *comps = _mesa_format_num_components(format);
1285 return;
1286 case MESA_FORMAT_A_UINT32:
1287 case MESA_FORMAT_L_UINT32:
1288 case MESA_FORMAT_I_UINT32:
1289 case MESA_FORMAT_LA_UINT32:
1290 *datatype = GL_UNSIGNED_INT;
1291 *comps = _mesa_format_num_components(format);
1292 return;
1293 case MESA_FORMAT_A_SINT8:
1294 case MESA_FORMAT_L_SINT8:
1295 case MESA_FORMAT_I_SINT8:
1296 case MESA_FORMAT_LA_SINT8:
1297 *datatype = GL_BYTE;
1298 *comps = _mesa_format_num_components(format);
1299 return;
1300
1301 case MESA_FORMAT_A_SINT16:
1302 case MESA_FORMAT_L_SINT16:
1303 case MESA_FORMAT_I_SINT16:
1304 case MESA_FORMAT_LA_SINT16:
1305 *datatype = GL_SHORT;
1306 *comps = _mesa_format_num_components(format);
1307 return;
1308
1309 case MESA_FORMAT_A_SINT32:
1310 case MESA_FORMAT_L_SINT32:
1311 case MESA_FORMAT_I_SINT32:
1312 case MESA_FORMAT_LA_SINT32:
1313 *datatype = GL_INT;
1314 *comps = _mesa_format_num_components(format);
1315 return;
1316
1317 case MESA_FORMAT_R_SINT8:
1318 case MESA_FORMAT_RG_SINT8:
1319 case MESA_FORMAT_RGB_SINT8:
1320 case MESA_FORMAT_RGBA_SINT8:
1321 *datatype = GL_BYTE;
1322 *comps = _mesa_format_num_components(format);
1323 return;
1324 case MESA_FORMAT_R_SINT16:
1325 case MESA_FORMAT_RG_SINT16:
1326 case MESA_FORMAT_RGB_SINT16:
1327 case MESA_FORMAT_RGBA_SINT16:
1328 *datatype = GL_SHORT;
1329 *comps = _mesa_format_num_components(format);
1330 return;
1331 case MESA_FORMAT_R_SINT32:
1332 case MESA_FORMAT_RG_SINT32:
1333 case MESA_FORMAT_RGB_SINT32:
1334 case MESA_FORMAT_RGBA_SINT32:
1335 *datatype = GL_INT;
1336 *comps = _mesa_format_num_components(format);
1337 return;
1338
1339 /**
1340 * \name Non-normalized unsigned integer formats.
1341 */
1342 case MESA_FORMAT_R_UINT8:
1343 case MESA_FORMAT_RG_UINT8:
1344 case MESA_FORMAT_RGB_UINT8:
1345 case MESA_FORMAT_RGBA_UINT8:
1346 *datatype = GL_UNSIGNED_BYTE;
1347 *comps = _mesa_format_num_components(format);
1348 return;
1349 case MESA_FORMAT_R_UINT16:
1350 case MESA_FORMAT_RG_UINT16:
1351 case MESA_FORMAT_RGB_UINT16:
1352 case MESA_FORMAT_RGBA_UINT16:
1353 *datatype = GL_UNSIGNED_SHORT;
1354 *comps = _mesa_format_num_components(format);
1355 return;
1356 case MESA_FORMAT_R_UINT32:
1357 case MESA_FORMAT_RG_UINT32:
1358 case MESA_FORMAT_RGB_UINT32:
1359 case MESA_FORMAT_RGBA_UINT32:
1360 *datatype = GL_UNSIGNED_INT;
1361 *comps = _mesa_format_num_components(format);
1362 return;
1363
1364 case MESA_FORMAT_R9G9B9E5_FLOAT:
1365 *datatype = GL_UNSIGNED_INT_5_9_9_9_REV;
1366 *comps = 3;
1367 return;
1368
1369 case MESA_FORMAT_R11G11B10_FLOAT:
1370 *datatype = GL_UNSIGNED_INT_10F_11F_11F_REV;
1371 *comps = 3;
1372 return;
1373
1374 case MESA_FORMAT_B10G10R10A2_UINT:
1375 case MESA_FORMAT_R10G10B10A2_UINT:
1376 *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1377 *comps = 4;
1378 return;
1379
1380 case MESA_FORMAT_R8G8B8X8_SRGB:
1381 case MESA_FORMAT_X8B8G8R8_SRGB:
1382 case MESA_FORMAT_RGBX_UINT8:
1383 *datatype = GL_UNSIGNED_BYTE;
1384 *comps = 4;
1385 return;
1386
1387 case MESA_FORMAT_R8G8B8X8_SNORM:
1388 case MESA_FORMAT_RGBX_SINT8:
1389 *datatype = GL_BYTE;
1390 *comps = 4;
1391 return;
1392
1393 case MESA_FORMAT_B10G10R10X2_UNORM:
1394 case MESA_FORMAT_R10G10B10X2_UNORM:
1395 *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1396 *comps = 4;
1397 return;
1398
1399 case MESA_FORMAT_RGBX_UNORM16:
1400 case MESA_FORMAT_RGBX_UINT16:
1401 *datatype = GL_UNSIGNED_SHORT;
1402 *comps = 4;
1403 return;
1404
1405 case MESA_FORMAT_RGBX_SNORM16:
1406 case MESA_FORMAT_RGBX_SINT16:
1407 *datatype = GL_SHORT;
1408 *comps = 4;
1409 return;
1410
1411 case MESA_FORMAT_RGBX_FLOAT16:
1412 *datatype = GL_HALF_FLOAT;
1413 *comps = 4;
1414 return;
1415
1416 case MESA_FORMAT_RGBX_FLOAT32:
1417 *datatype = GL_FLOAT;
1418 *comps = 4;
1419 return;
1420
1421 case MESA_FORMAT_RGBX_UINT32:
1422 *datatype = GL_UNSIGNED_INT;
1423 *comps = 4;
1424 return;
1425
1426 case MESA_FORMAT_RGBX_SINT32:
1427 *datatype = GL_INT;
1428 *comps = 4;
1429 return;
1430
1431 case MESA_FORMAT_R10G10B10A2_UNORM:
1432 *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1433 *comps = 4;
1434 return;
1435
1436 case MESA_FORMAT_G8R8_SNORM:
1437 *datatype = GL_BYTE;
1438 *comps = 2;
1439 return;
1440
1441 case MESA_FORMAT_G16R16_SNORM:
1442 *datatype = GL_SHORT;
1443 *comps = 2;
1444 return;
1445
1446 case MESA_FORMAT_B8G8R8X8_SRGB:
1447 case MESA_FORMAT_X8R8G8B8_SRGB:
1448 *datatype = GL_UNSIGNED_BYTE;
1449 *comps = 4;
1450 return;
1451
1452 case MESA_FORMAT_COUNT:
1453 assert(0);
1454 return;
1455
1456 case MESA_FORMAT_NONE:
1457 /* For debug builds, warn if any formats are not handled */
1458 #ifdef DEBUG
1459 default:
1460 #endif
1461 _mesa_problem(NULL, "bad format %s in _mesa_format_to_type_and_comps",
1462 _mesa_get_format_name(format));
1463 *datatype = 0;
1464 *comps = 1;
1465 }
1466 }
1467
1468 /**
1469 * Check if a mesa_format exactly matches a GL format/type combination
1470 * such that we can use memcpy() from one to the other.
1471 * \param mesa_format a MESA_FORMAT_x value
1472 * \param format the user-specified image format
1473 * \param type the user-specified image datatype
1474 * \param swapBytes typically the current pixel pack/unpack byteswap state
1475 * \return GL_TRUE if the formats match, GL_FALSE otherwise.
1476 */
1477 GLboolean
1478 _mesa_format_matches_format_and_type(mesa_format mesa_format,
1479 GLenum format, GLenum type,
1480 GLboolean swapBytes)
1481 {
1482 const GLboolean littleEndian = _mesa_little_endian();
1483
1484 /* Note: When reading a GL format/type combination, the format lists channel
1485 * assignments from most significant channel in the type to least
1486 * significant. A type with _REV indicates that the assignments are
1487 * swapped, so they are listed from least significant to most significant.
1488 *
1489 * For sanity, please keep this switch statement ordered the same as the
1490 * enums in formats.h.
1491 */
1492
1493 switch (mesa_format) {
1494
1495 case MESA_FORMAT_NONE:
1496 case MESA_FORMAT_COUNT:
1497 return GL_FALSE;
1498
1499 case MESA_FORMAT_A8B8G8R8_UNORM:
1500 case MESA_FORMAT_A8B8G8R8_SRGB:
1501 if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1502 return GL_TRUE;
1503
1504 if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV && swapBytes)
1505 return GL_TRUE;
1506
1507 if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && !littleEndian)
1508 return GL_TRUE;
1509
1510 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV
1511 && !swapBytes)
1512 return GL_TRUE;
1513
1514 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8
1515 && swapBytes)
1516 return GL_TRUE;
1517
1518 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && littleEndian)
1519 return GL_TRUE;
1520
1521 return GL_FALSE;
1522
1523 case MESA_FORMAT_R8G8B8A8_UNORM:
1524 case MESA_FORMAT_R8G8B8A8_SRGB:
1525 if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1526 !swapBytes)
1527 return GL_TRUE;
1528
1529 if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1530 return GL_TRUE;
1531
1532 if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && littleEndian)
1533 return GL_TRUE;
1534
1535 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8 &&
1536 !swapBytes)
1537 return GL_TRUE;
1538
1539 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1540 swapBytes)
1541 return GL_TRUE;
1542
1543 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && !littleEndian)
1544 return GL_TRUE;
1545
1546 return GL_FALSE;
1547
1548 case MESA_FORMAT_B8G8R8A8_UNORM:
1549 case MESA_FORMAT_B8G8R8A8_SRGB:
1550 if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1551 !swapBytes)
1552 return GL_TRUE;
1553
1554 if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1555 return GL_TRUE;
1556
1557 if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && littleEndian)
1558 return GL_TRUE;
1559
1560 return GL_FALSE;
1561
1562 case MESA_FORMAT_A8R8G8B8_UNORM:
1563 case MESA_FORMAT_A8R8G8B8_SRGB:
1564 if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1565 return GL_TRUE;
1566
1567 if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1568 swapBytes)
1569 return GL_TRUE;
1570
1571 if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && !littleEndian)
1572 return GL_TRUE;
1573
1574 return GL_FALSE;
1575
1576 case MESA_FORMAT_X8B8G8R8_UNORM:
1577 case MESA_FORMAT_R8G8B8X8_UNORM:
1578 return GL_FALSE;
1579
1580 case MESA_FORMAT_B8G8R8X8_UNORM:
1581 case MESA_FORMAT_X8R8G8B8_UNORM:
1582 return GL_FALSE;
1583
1584 case MESA_FORMAT_BGR_UNORM8:
1585 case MESA_FORMAT_BGR_SRGB8:
1586 return format == GL_BGR && type == GL_UNSIGNED_BYTE && littleEndian;
1587
1588 case MESA_FORMAT_RGB_UNORM8:
1589 return format == GL_RGB && type == GL_UNSIGNED_BYTE && littleEndian;
1590
1591 case MESA_FORMAT_B5G6R5_UNORM:
1592 return ((format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) ||
1593 (format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1594 !swapBytes;
1595
1596 case MESA_FORMAT_R5G6B5_UNORM:
1597 return ((format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5) ||
1598 (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1599 !swapBytes;
1600
1601 case MESA_FORMAT_B4G4R4A4_UNORM:
1602 return format == GL_BGRA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV &&
1603 !swapBytes;
1604
1605 case MESA_FORMAT_A4R4G4B4_UNORM:
1606 return GL_FALSE;
1607
1608 case MESA_FORMAT_A1B5G5R5_UNORM:
1609 return format == GL_RGBA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1610 !swapBytes;
1611
1612 case MESA_FORMAT_B5G5R5A1_UNORM:
1613 return format == GL_BGRA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV &&
1614 !swapBytes;
1615
1616 case MESA_FORMAT_A1R5G5B5_UNORM:
1617 return format == GL_BGRA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1618 !swapBytes;
1619
1620 case MESA_FORMAT_L4A4_UNORM:
1621 return GL_FALSE;
1622 case MESA_FORMAT_L8A8_UNORM:
1623 case MESA_FORMAT_L8A8_SRGB:
1624 return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_BYTE && littleEndian;
1625 case MESA_FORMAT_A8L8_UNORM:
1626 case MESA_FORMAT_A8L8_SRGB:
1627 return GL_FALSE;
1628
1629 case MESA_FORMAT_L16A16_UNORM:
1630 return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_SHORT && littleEndian && !swapBytes;
1631 case MESA_FORMAT_A16L16_UNORM:
1632 return GL_FALSE;
1633
1634 case MESA_FORMAT_B2G3R3_UNORM:
1635 return format == GL_RGB && type == GL_UNSIGNED_BYTE_3_3_2;
1636
1637 case MESA_FORMAT_R3G3B2_UNORM:
1638 return format == GL_RGB && type == GL_UNSIGNED_BYTE_2_3_3_REV;
1639
1640 case MESA_FORMAT_A4B4G4R4_UNORM:
1641 if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1642 return GL_TRUE;
1643
1644 if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1645 return GL_TRUE;
1646
1647 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1648 return GL_TRUE;
1649
1650 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1651 return GL_TRUE;
1652
1653 return GL_FALSE;
1654
1655 case MESA_FORMAT_R4G4B4A4_UNORM:
1656 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1657 return GL_TRUE;
1658
1659 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1660 return GL_TRUE;
1661
1662 if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1663 return GL_TRUE;
1664
1665 if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1666 return GL_TRUE;
1667
1668 return GL_FALSE;
1669
1670 case MESA_FORMAT_R5G5B5A1_UNORM:
1671 return format == GL_RGBA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV;
1672
1673 case MESA_FORMAT_A2B10G10R10_UNORM:
1674 return format == GL_RGBA && type == GL_UNSIGNED_INT_10_10_10_2;
1675
1676 case MESA_FORMAT_A2B10G10R10_UINT:
1677 return format == GL_RGBA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1678
1679 case MESA_FORMAT_A2R10G10B10_UNORM:
1680 return format == GL_BGRA && type == GL_UNSIGNED_INT_10_10_10_2;
1681
1682 case MESA_FORMAT_A2R10G10B10_UINT:
1683 return format == GL_BGRA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1684
1685 case MESA_FORMAT_A_UNORM8:
1686 return format == GL_ALPHA && type == GL_UNSIGNED_BYTE;
1687 case MESA_FORMAT_A_UNORM16:
1688 return format == GL_ALPHA && type == GL_UNSIGNED_SHORT && !swapBytes;
1689 case MESA_FORMAT_L_UNORM8:
1690 case MESA_FORMAT_L_SRGB8:
1691 return format == GL_LUMINANCE && type == GL_UNSIGNED_BYTE;
1692 case MESA_FORMAT_L_UNORM16:
1693 return format == GL_LUMINANCE && type == GL_UNSIGNED_SHORT && !swapBytes;
1694 case MESA_FORMAT_I_UNORM8:
1695 return format == GL_RED && type == GL_UNSIGNED_BYTE;
1696 case MESA_FORMAT_I_UNORM16:
1697 return format == GL_RED && type == GL_UNSIGNED_SHORT && !swapBytes;
1698
1699 case MESA_FORMAT_YCBCR:
1700 return format == GL_YCBCR_MESA &&
1701 ((type == GL_UNSIGNED_SHORT_8_8_MESA && littleEndian != swapBytes) ||
1702 (type == GL_UNSIGNED_SHORT_8_8_REV_MESA && littleEndian == swapBytes));
1703 case MESA_FORMAT_YCBCR_REV:
1704 return format == GL_YCBCR_MESA &&
1705 ((type == GL_UNSIGNED_SHORT_8_8_MESA && littleEndian == swapBytes) ||
1706 (type == GL_UNSIGNED_SHORT_8_8_REV_MESA && littleEndian != swapBytes));
1707
1708 case MESA_FORMAT_R_UNORM8:
1709 return format == GL_RED && type == GL_UNSIGNED_BYTE;
1710 case MESA_FORMAT_R8G8_UNORM:
1711 return format == GL_RG && type == GL_UNSIGNED_BYTE && littleEndian;
1712 case MESA_FORMAT_G8R8_UNORM:
1713 return GL_FALSE;
1714
1715 case MESA_FORMAT_R_UNORM16:
1716 return format == GL_RED && type == GL_UNSIGNED_SHORT &&
1717 !swapBytes;
1718 case MESA_FORMAT_R16G16_UNORM:
1719 return format == GL_RG && type == GL_UNSIGNED_SHORT && littleEndian &&
1720 !swapBytes;
1721 case MESA_FORMAT_G16R16_UNORM:
1722 return GL_FALSE;
1723
1724 case MESA_FORMAT_B10G10R10A2_UNORM:
1725 return format == GL_BGRA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1726 !swapBytes;
1727
1728 case MESA_FORMAT_S8_UINT_Z24_UNORM:
1729 return format == GL_DEPTH_STENCIL && type == GL_UNSIGNED_INT_24_8 &&
1730 !swapBytes;
1731 case MESA_FORMAT_X8_UINT_Z24_UNORM:
1732 case MESA_FORMAT_Z24_UNORM_S8_UINT:
1733 return GL_FALSE;
1734
1735 case MESA_FORMAT_Z_UNORM16:
1736 return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_SHORT &&
1737 !swapBytes;
1738
1739 case MESA_FORMAT_Z24_UNORM_X8_UINT:
1740 return GL_FALSE;
1741
1742 case MESA_FORMAT_Z_UNORM32:
1743 return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_INT &&
1744 !swapBytes;
1745
1746 case MESA_FORMAT_S_UINT8:
1747 return format == GL_STENCIL_INDEX && type == GL_UNSIGNED_BYTE;
1748
1749 case MESA_FORMAT_SRGB_DXT1:
1750 case MESA_FORMAT_SRGBA_DXT1:
1751 case MESA_FORMAT_SRGBA_DXT3:
1752 case MESA_FORMAT_SRGBA_DXT5:
1753 return GL_FALSE;
1754
1755 case MESA_FORMAT_RGB_FXT1:
1756 case MESA_FORMAT_RGBA_FXT1:
1757 case MESA_FORMAT_RGB_DXT1:
1758 case MESA_FORMAT_RGBA_DXT1:
1759 case MESA_FORMAT_RGBA_DXT3:
1760 case MESA_FORMAT_RGBA_DXT5:
1761 return GL_FALSE;
1762
1763 case MESA_FORMAT_BPTC_RGBA_UNORM:
1764 case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
1765 case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
1766 case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
1767 return GL_FALSE;
1768
1769 case MESA_FORMAT_RGBA_FLOAT32:
1770 return format == GL_RGBA && type == GL_FLOAT && !swapBytes;
1771 case MESA_FORMAT_RGBA_FLOAT16:
1772 return format == GL_RGBA && type == GL_HALF_FLOAT && !swapBytes;
1773
1774 case MESA_FORMAT_RGB_FLOAT32:
1775 return format == GL_RGB && type == GL_FLOAT && !swapBytes;
1776 case MESA_FORMAT_RGB_FLOAT16:
1777 return format == GL_RGB && type == GL_HALF_FLOAT && !swapBytes;
1778
1779 case MESA_FORMAT_A_FLOAT32:
1780 return format == GL_ALPHA && type == GL_FLOAT && !swapBytes;
1781 case MESA_FORMAT_A_FLOAT16:
1782 return format == GL_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1783
1784 case MESA_FORMAT_L_FLOAT32:
1785 return format == GL_LUMINANCE && type == GL_FLOAT && !swapBytes;
1786 case MESA_FORMAT_L_FLOAT16:
1787 return format == GL_LUMINANCE && type == GL_HALF_FLOAT && !swapBytes;
1788
1789 case MESA_FORMAT_LA_FLOAT32:
1790 return format == GL_LUMINANCE_ALPHA && type == GL_FLOAT && !swapBytes;
1791 case MESA_FORMAT_LA_FLOAT16:
1792 return format == GL_LUMINANCE_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1793
1794 case MESA_FORMAT_I_FLOAT32:
1795 return format == GL_RED && type == GL_FLOAT && !swapBytes;
1796 case MESA_FORMAT_I_FLOAT16:
1797 return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1798
1799 case MESA_FORMAT_R_FLOAT32:
1800 return format == GL_RED && type == GL_FLOAT && !swapBytes;
1801 case MESA_FORMAT_R_FLOAT16:
1802 return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1803
1804 case MESA_FORMAT_RG_FLOAT32:
1805 return format == GL_RG && type == GL_FLOAT && !swapBytes;
1806 case MESA_FORMAT_RG_FLOAT16:
1807 return format == GL_RG && type == GL_HALF_FLOAT && !swapBytes;
1808
1809 case MESA_FORMAT_A_UINT8:
1810 return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_BYTE;
1811 case MESA_FORMAT_A_UINT16:
1812 return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_SHORT &&
1813 !swapBytes;
1814 case MESA_FORMAT_A_UINT32:
1815 return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_INT &&
1816 !swapBytes;
1817 case MESA_FORMAT_A_SINT8:
1818 return format == GL_ALPHA_INTEGER && type == GL_BYTE;
1819 case MESA_FORMAT_A_SINT16:
1820 return format == GL_ALPHA_INTEGER && type == GL_SHORT && !swapBytes;
1821 case MESA_FORMAT_A_SINT32:
1822 return format == GL_ALPHA_INTEGER && type == GL_INT && !swapBytes;
1823
1824 case MESA_FORMAT_I_UINT8:
1825 return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
1826 case MESA_FORMAT_I_UINT16:
1827 return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
1828 case MESA_FORMAT_I_UINT32:
1829 return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1830 case MESA_FORMAT_I_SINT8:
1831 return format == GL_RED_INTEGER && type == GL_BYTE;
1832 case MESA_FORMAT_I_SINT16:
1833 return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1834 case MESA_FORMAT_I_SINT32:
1835 return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
1836
1837 case MESA_FORMAT_L_UINT8:
1838 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_BYTE;
1839 case MESA_FORMAT_L_UINT16:
1840 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_SHORT &&
1841 !swapBytes;
1842 case MESA_FORMAT_L_UINT32:
1843 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_INT &&
1844 !swapBytes;
1845 case MESA_FORMAT_L_SINT8:
1846 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_BYTE;
1847 case MESA_FORMAT_L_SINT16:
1848 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_SHORT &&
1849 !swapBytes;
1850 case MESA_FORMAT_L_SINT32:
1851 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_INT && !swapBytes;
1852
1853 case MESA_FORMAT_LA_UINT8:
1854 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1855 type == GL_UNSIGNED_BYTE && !swapBytes;
1856 case MESA_FORMAT_LA_UINT16:
1857 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1858 type == GL_UNSIGNED_SHORT && !swapBytes;
1859 case MESA_FORMAT_LA_UINT32:
1860 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1861 type == GL_UNSIGNED_INT && !swapBytes;
1862 case MESA_FORMAT_LA_SINT8:
1863 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_BYTE &&
1864 !swapBytes;
1865 case MESA_FORMAT_LA_SINT16:
1866 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_SHORT &&
1867 !swapBytes;
1868 case MESA_FORMAT_LA_SINT32:
1869 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_INT &&
1870 !swapBytes;
1871
1872 case MESA_FORMAT_R_SINT8:
1873 return format == GL_RED_INTEGER && type == GL_BYTE;
1874 case MESA_FORMAT_RG_SINT8:
1875 return format == GL_RG_INTEGER && type == GL_BYTE && !swapBytes;
1876 case MESA_FORMAT_RGB_SINT8:
1877 return format == GL_RGB_INTEGER && type == GL_BYTE && !swapBytes;
1878 case MESA_FORMAT_RGBA_SINT8:
1879 return format == GL_RGBA_INTEGER && type == GL_BYTE && !swapBytes;
1880 case MESA_FORMAT_R_SINT16:
1881 return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1882 case MESA_FORMAT_RG_SINT16:
1883 return format == GL_RG_INTEGER && type == GL_SHORT && !swapBytes;
1884 case MESA_FORMAT_RGB_SINT16:
1885 return format == GL_RGB_INTEGER && type == GL_SHORT && !swapBytes;
1886 case MESA_FORMAT_RGBA_SINT16:
1887 return format == GL_RGBA_INTEGER && type == GL_SHORT && !swapBytes;
1888 case MESA_FORMAT_R_SINT32:
1889 return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
1890 case MESA_FORMAT_RG_SINT32:
1891 return format == GL_RG_INTEGER && type == GL_INT && !swapBytes;
1892 case MESA_FORMAT_RGB_SINT32:
1893 return format == GL_RGB_INTEGER && type == GL_INT && !swapBytes;
1894 case MESA_FORMAT_RGBA_SINT32:
1895 return format == GL_RGBA_INTEGER && type == GL_INT && !swapBytes;
1896
1897 case MESA_FORMAT_R_UINT8:
1898 return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
1899 case MESA_FORMAT_RG_UINT8:
1900 return format == GL_RG_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
1901 case MESA_FORMAT_RGB_UINT8:
1902 return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
1903 case MESA_FORMAT_RGBA_UINT8:
1904 return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_BYTE &&
1905 !swapBytes;
1906 case MESA_FORMAT_R_UINT16:
1907 return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT &&
1908 !swapBytes;
1909 case MESA_FORMAT_RG_UINT16:
1910 return format == GL_RG_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
1911 case MESA_FORMAT_RGB_UINT16:
1912 return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT &&
1913 !swapBytes;
1914 case MESA_FORMAT_RGBA_UINT16:
1915 return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT &&
1916 !swapBytes;
1917 case MESA_FORMAT_R_UINT32:
1918 return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1919 case MESA_FORMAT_RG_UINT32:
1920 return format == GL_RG_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1921 case MESA_FORMAT_RGB_UINT32:
1922 return format == GL_RGB_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1923 case MESA_FORMAT_RGBA_UINT32:
1924 return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1925
1926 case MESA_FORMAT_R_SNORM8:
1927 return format == GL_RED && type == GL_BYTE;
1928 case MESA_FORMAT_R8G8_SNORM:
1929 return format == GL_RG && type == GL_BYTE && littleEndian &&
1930 !swapBytes;
1931 case MESA_FORMAT_X8B8G8R8_SNORM:
1932 return GL_FALSE;
1933
1934 case MESA_FORMAT_A8B8G8R8_SNORM:
1935 if (format == GL_RGBA && type == GL_BYTE && !littleEndian)
1936 return GL_TRUE;
1937
1938 if (format == GL_ABGR_EXT && type == GL_BYTE && littleEndian)
1939 return GL_TRUE;
1940
1941 return GL_FALSE;
1942
1943 case MESA_FORMAT_R8G8B8A8_SNORM:
1944 if (format == GL_RGBA && type == GL_BYTE && littleEndian)
1945 return GL_TRUE;
1946
1947 if (format == GL_ABGR_EXT && type == GL_BYTE && !littleEndian)
1948 return GL_TRUE;
1949
1950 return GL_FALSE;
1951
1952 case MESA_FORMAT_R_SNORM16:
1953 return format == GL_RED && type == GL_SHORT &&
1954 !swapBytes;
1955 case MESA_FORMAT_R16G16_SNORM:
1956 return format == GL_RG && type == GL_SHORT && littleEndian && !swapBytes;
1957 case MESA_FORMAT_RGB_SNORM16:
1958 return format == GL_RGB && type == GL_SHORT && !swapBytes;
1959 case MESA_FORMAT_RGBA_SNORM16:
1960 return format == GL_RGBA && type == GL_SHORT && !swapBytes;
1961 case MESA_FORMAT_RGBA_UNORM16:
1962 return format == GL_RGBA && type == GL_UNSIGNED_SHORT &&
1963 !swapBytes;
1964
1965 case MESA_FORMAT_R_RGTC1_UNORM:
1966 case MESA_FORMAT_R_RGTC1_SNORM:
1967 case MESA_FORMAT_RG_RGTC2_UNORM:
1968 case MESA_FORMAT_RG_RGTC2_SNORM:
1969 return GL_FALSE;
1970
1971 case MESA_FORMAT_L_LATC1_UNORM:
1972 case MESA_FORMAT_L_LATC1_SNORM:
1973 case MESA_FORMAT_LA_LATC2_UNORM:
1974 case MESA_FORMAT_LA_LATC2_SNORM:
1975 return GL_FALSE;
1976
1977 case MESA_FORMAT_ETC1_RGB8:
1978 case MESA_FORMAT_ETC2_RGB8:
1979 case MESA_FORMAT_ETC2_SRGB8:
1980 case MESA_FORMAT_ETC2_RGBA8_EAC:
1981 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
1982 case MESA_FORMAT_ETC2_R11_EAC:
1983 case MESA_FORMAT_ETC2_RG11_EAC:
1984 case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
1985 case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
1986 case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
1987 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
1988 return GL_FALSE;
1989
1990 case MESA_FORMAT_A_SNORM8:
1991 return format == GL_ALPHA && type == GL_BYTE;
1992 case MESA_FORMAT_L_SNORM8:
1993 return format == GL_LUMINANCE && type == GL_BYTE;
1994 case MESA_FORMAT_L8A8_SNORM:
1995 return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
1996 littleEndian && !swapBytes;
1997 case MESA_FORMAT_A8L8_SNORM:
1998 return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
1999 !littleEndian && !swapBytes;
2000 case MESA_FORMAT_I_SNORM8:
2001 return format == GL_RED && type == GL_BYTE;
2002 case MESA_FORMAT_A_SNORM16:
2003 return format == GL_ALPHA && type == GL_SHORT && !swapBytes;
2004 case MESA_FORMAT_L_SNORM16:
2005 return format == GL_LUMINANCE && type == GL_SHORT && !swapBytes;
2006 case MESA_FORMAT_LA_SNORM16:
2007 return format == GL_LUMINANCE_ALPHA && type == GL_SHORT &&
2008 littleEndian && !swapBytes;
2009 case MESA_FORMAT_I_SNORM16:
2010 return format == GL_RED && type == GL_SHORT && littleEndian &&
2011 !swapBytes;
2012
2013 case MESA_FORMAT_B10G10R10A2_UINT:
2014 return (format == GL_BGRA_INTEGER_EXT &&
2015 type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2016 !swapBytes);
2017
2018 case MESA_FORMAT_R10G10B10A2_UINT:
2019 return (format == GL_RGBA_INTEGER_EXT &&
2020 type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2021 !swapBytes);
2022
2023 case MESA_FORMAT_R9G9B9E5_FLOAT:
2024 return format == GL_RGB && type == GL_UNSIGNED_INT_5_9_9_9_REV &&
2025 !swapBytes;
2026
2027 case MESA_FORMAT_R11G11B10_FLOAT:
2028 return format == GL_RGB && type == GL_UNSIGNED_INT_10F_11F_11F_REV &&
2029 !swapBytes;
2030
2031 case MESA_FORMAT_Z_FLOAT32:
2032 return format == GL_DEPTH_COMPONENT && type == GL_FLOAT && !swapBytes;
2033
2034 case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
2035 return format == GL_DEPTH_STENCIL &&
2036 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV && !swapBytes;
2037
2038 case MESA_FORMAT_B4G4R4X4_UNORM:
2039 case MESA_FORMAT_B5G5R5X1_UNORM:
2040 case MESA_FORMAT_R8G8B8X8_SNORM:
2041 case MESA_FORMAT_R8G8B8X8_SRGB:
2042 case MESA_FORMAT_X8B8G8R8_SRGB:
2043 case MESA_FORMAT_RGBX_UINT8:
2044 case MESA_FORMAT_RGBX_SINT8:
2045 case MESA_FORMAT_B10G10R10X2_UNORM:
2046 case MESA_FORMAT_R10G10B10X2_UNORM:
2047 case MESA_FORMAT_RGBX_UNORM16:
2048 case MESA_FORMAT_RGBX_SNORM16:
2049 case MESA_FORMAT_RGBX_FLOAT16:
2050 case MESA_FORMAT_RGBX_UINT16:
2051 case MESA_FORMAT_RGBX_SINT16:
2052 case MESA_FORMAT_RGBX_FLOAT32:
2053 case MESA_FORMAT_RGBX_UINT32:
2054 case MESA_FORMAT_RGBX_SINT32:
2055 return GL_FALSE;
2056
2057 case MESA_FORMAT_R10G10B10A2_UNORM:
2058 return format == GL_RGBA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2059 !swapBytes;
2060
2061 case MESA_FORMAT_G8R8_SNORM:
2062 return format == GL_RG && type == GL_BYTE && !littleEndian &&
2063 !swapBytes;
2064
2065 case MESA_FORMAT_G16R16_SNORM:
2066 return format == GL_RG && type == GL_SHORT && !littleEndian &&
2067 !swapBytes;
2068
2069 case MESA_FORMAT_B8G8R8X8_SRGB:
2070 case MESA_FORMAT_X8R8G8B8_SRGB:
2071 return GL_FALSE;
2072 }
2073
2074 return GL_FALSE;
2075 }
2076