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mesa/formats: Don't flip channels of null array formats
[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_OTHER
192 */
193 extern enum mesa_format_layout
194 _mesa_get_format_layout(mesa_format format)
195 {
196 const struct gl_format_info *info = _mesa_get_format_info(format);
197 return info->Layout;
198 }
199
200
201 /**
202 * Return the data type (or more specifically, the data representation)
203 * for the given format.
204 * The return value will be one of:
205 * GL_UNSIGNED_NORMALIZED = unsigned int representing [0,1]
206 * GL_SIGNED_NORMALIZED = signed int representing [-1, 1]
207 * GL_UNSIGNED_INT = an ordinary unsigned integer
208 * GL_INT = an ordinary signed integer
209 * GL_FLOAT = an ordinary float
210 */
211 GLenum
212 _mesa_get_format_datatype(mesa_format format)
213 {
214 const struct gl_format_info *info = _mesa_get_format_info(format);
215 return info->DataType;
216 }
217
218 static GLenum
219 get_base_format_for_array_format(mesa_array_format format)
220 {
221 uint8_t swizzle[4];
222 int num_channels;
223
224 _mesa_array_format_get_swizzle(format, swizzle);
225 num_channels = _mesa_array_format_get_num_channels(format);
226
227 switch (num_channels) {
228 case 4:
229 /* FIXME: RGBX formats have 4 channels, but their base format is GL_RGB.
230 * This is not really a problem for now because we only create array
231 * formats from GL format/type combinations, and these cannot specify
232 * RGBX formats.
233 */
234 return GL_RGBA;
235 case 3:
236 return GL_RGB;
237 case 2:
238 if (swizzle[0] == 0 &&
239 swizzle[1] == 0 &&
240 swizzle[2] == 0 &&
241 swizzle[3] == 1)
242 return GL_LUMINANCE_ALPHA;
243 if (swizzle[0] == 1 &&
244 swizzle[1] == 1 &&
245 swizzle[2] == 1 &&
246 swizzle[3] == 0)
247 return GL_LUMINANCE_ALPHA;
248 if (swizzle[0] == 0 &&
249 swizzle[1] == 1 &&
250 swizzle[2] == 4 &&
251 swizzle[3] == 5)
252 return GL_RG;
253 if (swizzle[0] == 1 &&
254 swizzle[1] == 0 &&
255 swizzle[2] == 4 &&
256 swizzle[3] == 5)
257 return GL_RG;
258 break;
259 case 1:
260 if (swizzle[0] == 0 &&
261 swizzle[1] == 0 &&
262 swizzle[2] == 0 &&
263 swizzle[3] == 5)
264 return GL_LUMINANCE;
265 if (swizzle[0] == 0 &&
266 swizzle[1] == 0 &&
267 swizzle[2] == 0 &&
268 swizzle[3] == 0)
269 return GL_INTENSITY;
270 if (swizzle[0] <= MESA_FORMAT_SWIZZLE_W)
271 return GL_RED;
272 if (swizzle[1] <= MESA_FORMAT_SWIZZLE_W)
273 return GL_GREEN;
274 if (swizzle[2] <= MESA_FORMAT_SWIZZLE_W)
275 return GL_BLUE;
276 if (swizzle[3] <= MESA_FORMAT_SWIZZLE_W)
277 return GL_ALPHA;
278 break;
279 }
280
281 unreachable("Unsupported format");
282 }
283
284 /**
285 * Return the basic format for the given type. The result will be one of
286 * GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY,
287 * GL_YCBCR_MESA, GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
288 * This functions accepts a mesa_format or a mesa_array_format.
289 */
290 GLenum
291 _mesa_get_format_base_format(uint32_t format)
292 {
293 if (!_mesa_format_is_mesa_array_format(format)) {
294 const struct gl_format_info *info = _mesa_get_format_info(format);
295 return info->BaseFormat;
296 } else {
297 return get_base_format_for_array_format(format);
298 }
299 }
300
301
302 /**
303 * Return the block size (in pixels) for the given format. Normally
304 * the block size is 1x1. But compressed formats will have block sizes
305 * of 4x4 or 8x4 pixels, etc.
306 * \param bw returns block width in pixels
307 * \param bh returns block height in pixels
308 */
309 void
310 _mesa_get_format_block_size(mesa_format format, GLuint *bw, GLuint *bh)
311 {
312 const struct gl_format_info *info = _mesa_get_format_info(format);
313 *bw = info->BlockWidth;
314 *bh = info->BlockHeight;
315 }
316
317
318 /**
319 * Returns the an array of four numbers representing the transformation
320 * from the RGBA or SZ colorspace to the given format. For array formats,
321 * the i'th RGBA component is given by:
322 *
323 * if (swizzle[i] <= MESA_FORMAT_SWIZZLE_W)
324 * comp = data[swizzle[i]];
325 * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_ZERO)
326 * comp = 0;
327 * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_ONE)
328 * comp = 1;
329 * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_NONE)
330 * // data does not contain a channel of this format
331 *
332 * For packed formats, the swizzle gives the number of components left of
333 * the least significant bit.
334 *
335 * Compressed formats have no swizzle.
336 */
337 void
338 _mesa_get_format_swizzle(mesa_format format, uint8_t swizzle_out[4])
339 {
340 const struct gl_format_info *info = _mesa_get_format_info(format);
341 memcpy(swizzle_out, info->Swizzle, sizeof(info->Swizzle));
342 }
343
344 mesa_array_format
345 _mesa_array_format_flip_channels(mesa_array_format format)
346 {
347 int num_channels;
348 uint8_t swizzle[4];
349
350 num_channels = _mesa_array_format_get_num_channels(format);
351 _mesa_array_format_get_swizzle(format, swizzle);
352
353 if (num_channels == 1)
354 return format;
355
356 if (num_channels == 2) {
357 /* Assert that the swizzle makes sense for 2 channels */
358 for (unsigned i = 0; i < 4; i++)
359 assert(swizzle[i] != 2 && swizzle[i] != 3);
360
361 static const uint8_t flip_xy[6] = { 1, 0, 2, 3, 4, 5 };
362 _mesa_array_format_set_swizzle(&format,
363 flip_xy[swizzle[0]], flip_xy[swizzle[1]],
364 flip_xy[swizzle[2]], flip_xy[swizzle[3]]);
365 return format;
366 }
367
368 if (num_channels == 4) {
369 static const uint8_t flip[6] = { 3, 2, 1, 0, 4, 5 };
370 _mesa_array_format_set_swizzle(&format,
371 flip[swizzle[0]], flip[swizzle[1]],
372 flip[swizzle[2]], flip[swizzle[3]]);
373 return format;
374 }
375
376 unreachable("Invalid array format");
377 }
378
379 uint32_t
380 _mesa_format_to_array_format(mesa_format format)
381 {
382 const struct gl_format_info *info = _mesa_get_format_info(format);
383 if (info->ArrayFormat && !_mesa_little_endian() &&
384 info->Layout == MESA_FORMAT_LAYOUT_PACKED)
385 return _mesa_array_format_flip_channels(info->ArrayFormat);
386 else
387 return info->ArrayFormat;
388 }
389
390 static struct hash_table *format_array_format_table;
391 static once_flag format_array_format_table_exists = ONCE_FLAG_INIT;
392
393 static bool
394 array_formats_equal(const void *a, const void *b)
395 {
396 return (intptr_t)a == (intptr_t)b;
397 }
398
399 static void
400 format_array_format_table_init(void)
401 {
402 const struct gl_format_info *info;
403 mesa_array_format array_format;
404 unsigned f;
405
406 format_array_format_table = _mesa_hash_table_create(NULL, NULL,
407 array_formats_equal);
408
409 if (!format_array_format_table) {
410 _mesa_error_no_memory(__func__);
411 return;
412 }
413
414 for (f = 1; f < MESA_FORMAT_COUNT; ++f) {
415 info = _mesa_get_format_info(f);
416 if (!info->ArrayFormat)
417 continue;
418
419 if (_mesa_little_endian()) {
420 array_format = info->ArrayFormat;
421 } else {
422 array_format = _mesa_array_format_flip_channels(info->ArrayFormat);
423 }
424
425 /* This can happen and does for some of the BGR formats. Let's take
426 * the first one in the list.
427 */
428 if (_mesa_hash_table_search_pre_hashed(format_array_format_table,
429 array_format,
430 (void *)(intptr_t)array_format))
431 continue;
432
433 _mesa_hash_table_insert_pre_hashed(format_array_format_table,
434 array_format,
435 (void *)(intptr_t)array_format,
436 (void *)(intptr_t)f);
437 }
438 }
439
440 mesa_format
441 _mesa_format_from_array_format(uint32_t array_format)
442 {
443 struct hash_entry *entry;
444
445 assert(_mesa_format_is_mesa_array_format(array_format));
446
447 call_once(&format_array_format_table_exists, format_array_format_table_init);
448
449 if (!format_array_format_table) {
450 static const once_flag once_flag_init = ONCE_FLAG_INIT;
451 format_array_format_table_exists = once_flag_init;
452 return MESA_FORMAT_NONE;
453 }
454
455 entry = _mesa_hash_table_search_pre_hashed(format_array_format_table,
456 array_format,
457 (void *)(intptr_t)array_format);
458 if (entry)
459 return (intptr_t)entry->data;
460 else
461 return MESA_FORMAT_NONE;
462 }
463
464 /** Is the given format a compressed format? */
465 GLboolean
466 _mesa_is_format_compressed(mesa_format format)
467 {
468 const struct gl_format_info *info = _mesa_get_format_info(format);
469 return info->BlockWidth > 1 || info->BlockHeight > 1;
470 }
471
472
473 /**
474 * Determine if the given format represents a packed depth/stencil buffer.
475 */
476 GLboolean
477 _mesa_is_format_packed_depth_stencil(mesa_format format)
478 {
479 const struct gl_format_info *info = _mesa_get_format_info(format);
480
481 return info->BaseFormat == GL_DEPTH_STENCIL;
482 }
483
484
485 /**
486 * Is the given format a signed/unsigned integer color format?
487 */
488 GLboolean
489 _mesa_is_format_integer_color(mesa_format format)
490 {
491 const struct gl_format_info *info = _mesa_get_format_info(format);
492 return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT) &&
493 info->BaseFormat != GL_DEPTH_COMPONENT &&
494 info->BaseFormat != GL_DEPTH_STENCIL &&
495 info->BaseFormat != GL_STENCIL_INDEX;
496 }
497
498
499 /**
500 * Is the given format an unsigned integer format?
501 */
502 GLboolean
503 _mesa_is_format_unsigned(mesa_format format)
504 {
505 const struct gl_format_info *info = _mesa_get_format_info(format);
506 return _mesa_is_type_unsigned(info->DataType);
507 }
508
509
510 /**
511 * Does the given format store signed values?
512 */
513 GLboolean
514 _mesa_is_format_signed(mesa_format format)
515 {
516 if (format == MESA_FORMAT_R11G11B10_FLOAT ||
517 format == MESA_FORMAT_R9G9B9E5_FLOAT) {
518 /* these packed float formats only store unsigned values */
519 return GL_FALSE;
520 }
521 else {
522 const struct gl_format_info *info = _mesa_get_format_info(format);
523 return (info->DataType == GL_SIGNED_NORMALIZED ||
524 info->DataType == GL_INT ||
525 info->DataType == GL_FLOAT);
526 }
527 }
528
529 /**
530 * Is the given format an integer format?
531 */
532 GLboolean
533 _mesa_is_format_integer(mesa_format format)
534 {
535 const struct gl_format_info *info = _mesa_get_format_info(format);
536 return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT);
537 }
538
539
540 /**
541 * Return true if the given format is a color format.
542 */
543 GLenum
544 _mesa_is_format_color_format(mesa_format format)
545 {
546 const struct gl_format_info *info = _mesa_get_format_info(format);
547 switch (info->BaseFormat) {
548 case GL_DEPTH_COMPONENT:
549 case GL_STENCIL_INDEX:
550 case GL_DEPTH_STENCIL:
551 return false;
552 default:
553 return true;
554 }
555 }
556
557
558 /**
559 * Return color encoding for given format.
560 * \return GL_LINEAR or GL_SRGB
561 */
562 GLenum
563 _mesa_get_format_color_encoding(mesa_format format)
564 {
565 /* XXX this info should be encoded in gl_format_info */
566 switch (format) {
567 case MESA_FORMAT_BGR_SRGB8:
568 case MESA_FORMAT_A8B8G8R8_SRGB:
569 case MESA_FORMAT_B8G8R8A8_SRGB:
570 case MESA_FORMAT_A8R8G8B8_SRGB:
571 case MESA_FORMAT_R8G8B8A8_SRGB:
572 case MESA_FORMAT_L_SRGB8:
573 case MESA_FORMAT_L8A8_SRGB:
574 case MESA_FORMAT_A8L8_SRGB:
575 case MESA_FORMAT_SRGB_DXT1:
576 case MESA_FORMAT_SRGBA_DXT1:
577 case MESA_FORMAT_SRGBA_DXT3:
578 case MESA_FORMAT_SRGBA_DXT5:
579 case MESA_FORMAT_R8G8B8X8_SRGB:
580 case MESA_FORMAT_ETC2_SRGB8:
581 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
582 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
583 case MESA_FORMAT_B8G8R8X8_SRGB:
584 case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
585 return GL_SRGB;
586 default:
587 return GL_LINEAR;
588 }
589 }
590
591
592 /**
593 * Return TRUE if format is an ETC2 compressed format specified
594 * by GL_ARB_ES3_compatibility.
595 */
596 bool
597 _mesa_is_format_etc2(mesa_format format)
598 {
599 switch (format) {
600 case MESA_FORMAT_ETC2_RGB8:
601 case MESA_FORMAT_ETC2_SRGB8:
602 case MESA_FORMAT_ETC2_RGBA8_EAC:
603 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
604 case MESA_FORMAT_ETC2_R11_EAC:
605 case MESA_FORMAT_ETC2_RG11_EAC:
606 case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
607 case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
608 case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
609 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
610 return GL_TRUE;
611 default:
612 return GL_FALSE;
613 }
614 }
615
616
617 /**
618 * For an sRGB format, return the corresponding linear color space format.
619 * For non-sRGB formats, return the format as-is.
620 */
621 mesa_format
622 _mesa_get_srgb_format_linear(mesa_format format)
623 {
624 switch (format) {
625 case MESA_FORMAT_BGR_SRGB8:
626 format = MESA_FORMAT_BGR_UNORM8;
627 break;
628 case MESA_FORMAT_A8B8G8R8_SRGB:
629 format = MESA_FORMAT_A8B8G8R8_UNORM;
630 break;
631 case MESA_FORMAT_B8G8R8A8_SRGB:
632 format = MESA_FORMAT_B8G8R8A8_UNORM;
633 break;
634 case MESA_FORMAT_A8R8G8B8_SRGB:
635 format = MESA_FORMAT_A8R8G8B8_UNORM;
636 break;
637 case MESA_FORMAT_R8G8B8A8_SRGB:
638 format = MESA_FORMAT_R8G8B8A8_UNORM;
639 break;
640 case MESA_FORMAT_L_SRGB8:
641 format = MESA_FORMAT_L_UNORM8;
642 break;
643 case MESA_FORMAT_L8A8_SRGB:
644 format = MESA_FORMAT_L8A8_UNORM;
645 break;
646 case MESA_FORMAT_A8L8_SRGB:
647 format = MESA_FORMAT_A8L8_UNORM;
648 break;
649 case MESA_FORMAT_SRGB_DXT1:
650 format = MESA_FORMAT_RGB_DXT1;
651 break;
652 case MESA_FORMAT_SRGBA_DXT1:
653 format = MESA_FORMAT_RGBA_DXT1;
654 break;
655 case MESA_FORMAT_SRGBA_DXT3:
656 format = MESA_FORMAT_RGBA_DXT3;
657 break;
658 case MESA_FORMAT_SRGBA_DXT5:
659 format = MESA_FORMAT_RGBA_DXT5;
660 break;
661 case MESA_FORMAT_R8G8B8X8_SRGB:
662 format = MESA_FORMAT_R8G8B8X8_UNORM;
663 break;
664 case MESA_FORMAT_X8B8G8R8_SRGB:
665 format = MESA_FORMAT_X8B8G8R8_UNORM;
666 break;
667 case MESA_FORMAT_ETC2_SRGB8:
668 format = MESA_FORMAT_ETC2_RGB8;
669 break;
670 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
671 format = MESA_FORMAT_ETC2_RGBA8_EAC;
672 break;
673 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
674 format = MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1;
675 break;
676 case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
677 format = MESA_FORMAT_BPTC_RGBA_UNORM;
678 break;
679 case MESA_FORMAT_B8G8R8X8_SRGB:
680 format = MESA_FORMAT_B8G8R8X8_UNORM;
681 break;
682 case MESA_FORMAT_X8R8G8B8_SRGB:
683 format = MESA_FORMAT_X8R8G8B8_UNORM;
684 break;
685 default:
686 break;
687 }
688 return format;
689 }
690
691
692 /**
693 * If the given format is a compressed format, return a corresponding
694 * uncompressed format.
695 */
696 mesa_format
697 _mesa_get_uncompressed_format(mesa_format format)
698 {
699 switch (format) {
700 case MESA_FORMAT_RGB_FXT1:
701 return MESA_FORMAT_BGR_UNORM8;
702 case MESA_FORMAT_RGBA_FXT1:
703 return MESA_FORMAT_A8B8G8R8_UNORM;
704 case MESA_FORMAT_RGB_DXT1:
705 case MESA_FORMAT_SRGB_DXT1:
706 return MESA_FORMAT_BGR_UNORM8;
707 case MESA_FORMAT_RGBA_DXT1:
708 case MESA_FORMAT_SRGBA_DXT1:
709 return MESA_FORMAT_A8B8G8R8_UNORM;
710 case MESA_FORMAT_RGBA_DXT3:
711 case MESA_FORMAT_SRGBA_DXT3:
712 return MESA_FORMAT_A8B8G8R8_UNORM;
713 case MESA_FORMAT_RGBA_DXT5:
714 case MESA_FORMAT_SRGBA_DXT5:
715 return MESA_FORMAT_A8B8G8R8_UNORM;
716 case MESA_FORMAT_R_RGTC1_UNORM:
717 return MESA_FORMAT_R_UNORM8;
718 case MESA_FORMAT_R_RGTC1_SNORM:
719 return MESA_FORMAT_R_SNORM8;
720 case MESA_FORMAT_RG_RGTC2_UNORM:
721 return MESA_FORMAT_R8G8_UNORM;
722 case MESA_FORMAT_RG_RGTC2_SNORM:
723 return MESA_FORMAT_R8G8_SNORM;
724 case MESA_FORMAT_L_LATC1_UNORM:
725 return MESA_FORMAT_L_UNORM8;
726 case MESA_FORMAT_L_LATC1_SNORM:
727 return MESA_FORMAT_L_SNORM8;
728 case MESA_FORMAT_LA_LATC2_UNORM:
729 return MESA_FORMAT_L8A8_UNORM;
730 case MESA_FORMAT_LA_LATC2_SNORM:
731 return MESA_FORMAT_L8A8_SNORM;
732 case MESA_FORMAT_ETC1_RGB8:
733 case MESA_FORMAT_ETC2_RGB8:
734 case MESA_FORMAT_ETC2_SRGB8:
735 return MESA_FORMAT_BGR_UNORM8;
736 case MESA_FORMAT_ETC2_RGBA8_EAC:
737 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
738 case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
739 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
740 return MESA_FORMAT_A8B8G8R8_UNORM;
741 case MESA_FORMAT_ETC2_R11_EAC:
742 case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
743 return MESA_FORMAT_R_UNORM16;
744 case MESA_FORMAT_ETC2_RG11_EAC:
745 case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
746 return MESA_FORMAT_R16G16_UNORM;
747 case MESA_FORMAT_BPTC_RGBA_UNORM:
748 case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
749 return MESA_FORMAT_A8B8G8R8_UNORM;
750 case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
751 case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
752 return MESA_FORMAT_RGB_FLOAT32;
753 default:
754 #ifdef DEBUG
755 assert(!_mesa_is_format_compressed(format));
756 #endif
757 return format;
758 }
759 }
760
761
762 GLuint
763 _mesa_format_num_components(mesa_format format)
764 {
765 const struct gl_format_info *info = _mesa_get_format_info(format);
766 return ((info->RedBits > 0) +
767 (info->GreenBits > 0) +
768 (info->BlueBits > 0) +
769 (info->AlphaBits > 0) +
770 (info->LuminanceBits > 0) +
771 (info->IntensityBits > 0) +
772 (info->DepthBits > 0) +
773 (info->StencilBits > 0));
774 }
775
776
777 /**
778 * Returns true if a color format has data stored in the R/G/B/A channels,
779 * given an index from 0 to 3.
780 */
781 bool
782 _mesa_format_has_color_component(mesa_format format, int component)
783 {
784 const struct gl_format_info *info = _mesa_get_format_info(format);
785
786 assert(info->BaseFormat != GL_DEPTH_COMPONENT &&
787 info->BaseFormat != GL_DEPTH_STENCIL &&
788 info->BaseFormat != GL_STENCIL_INDEX);
789
790 switch (component) {
791 case 0:
792 return (info->RedBits + info->IntensityBits + info->LuminanceBits) > 0;
793 case 1:
794 return (info->GreenBits + info->IntensityBits + info->LuminanceBits) > 0;
795 case 2:
796 return (info->BlueBits + info->IntensityBits + info->LuminanceBits) > 0;
797 case 3:
798 return (info->AlphaBits + info->IntensityBits) > 0;
799 default:
800 assert(!"Invalid color component: must be 0..3");
801 return false;
802 }
803 }
804
805
806 /**
807 * Return number of bytes needed to store an image of the given size
808 * in the given format.
809 */
810 GLuint
811 _mesa_format_image_size(mesa_format format, GLsizei width,
812 GLsizei height, GLsizei depth)
813 {
814 const struct gl_format_info *info = _mesa_get_format_info(format);
815 /* Strictly speaking, a conditional isn't needed here */
816 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
817 /* compressed format (2D only for now) */
818 const GLuint bw = info->BlockWidth, bh = info->BlockHeight;
819 const GLuint wblocks = (width + bw - 1) / bw;
820 const GLuint hblocks = (height + bh - 1) / bh;
821 const GLuint sz = wblocks * hblocks * info->BytesPerBlock;
822 return sz * depth;
823 }
824 else {
825 /* non-compressed */
826 const GLuint sz = width * height * depth * info->BytesPerBlock;
827 return sz;
828 }
829 }
830
831
832 /**
833 * Same as _mesa_format_image_size() but returns a 64-bit value to
834 * accommodate very large textures.
835 */
836 uint64_t
837 _mesa_format_image_size64(mesa_format format, GLsizei width,
838 GLsizei height, GLsizei depth)
839 {
840 const struct gl_format_info *info = _mesa_get_format_info(format);
841 /* Strictly speaking, a conditional isn't needed here */
842 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
843 /* compressed format (2D only for now) */
844 const uint64_t bw = info->BlockWidth, bh = info->BlockHeight;
845 const uint64_t wblocks = (width + bw - 1) / bw;
846 const uint64_t hblocks = (height + bh - 1) / bh;
847 const uint64_t sz = wblocks * hblocks * info->BytesPerBlock;
848 return sz * depth;
849 }
850 else {
851 /* non-compressed */
852 const uint64_t sz = ((uint64_t) width *
853 (uint64_t) height *
854 (uint64_t) depth *
855 info->BytesPerBlock);
856 return sz;
857 }
858 }
859
860
861
862 GLint
863 _mesa_format_row_stride(mesa_format format, GLsizei width)
864 {
865 const struct gl_format_info *info = _mesa_get_format_info(format);
866 /* Strictly speaking, a conditional isn't needed here */
867 if (info->BlockWidth > 1 || info->BlockHeight > 1) {
868 /* compressed format */
869 const GLuint bw = info->BlockWidth;
870 const GLuint wblocks = (width + bw - 1) / bw;
871 const GLint stride = wblocks * info->BytesPerBlock;
872 return stride;
873 }
874 else {
875 const GLint stride = width * info->BytesPerBlock;
876 return stride;
877 }
878 }
879
880
881 /**
882 * Debug/test: check that all formats are handled in the
883 * _mesa_format_to_type_and_comps() function. When new pixel formats
884 * are added to Mesa, that function needs to be updated.
885 * This is a no-op after the first call.
886 */
887 static void
888 check_format_to_type_and_comps(void)
889 {
890 mesa_format f;
891
892 for (f = MESA_FORMAT_NONE + 1; f < MESA_FORMAT_COUNT; f++) {
893 GLenum datatype = 0;
894 GLuint comps = 0;
895 /* This function will emit a problem/warning if the format is
896 * not handled.
897 */
898 _mesa_format_to_type_and_comps(f, &datatype, &comps);
899 }
900 }
901
902 /**
903 * Do sanity checking of the format info table.
904 */
905 void
906 _mesa_test_formats(void)
907 {
908 GLuint i;
909
910 STATIC_ASSERT(ARRAY_SIZE(format_info) == MESA_FORMAT_COUNT);
911
912 for (i = 0; i < MESA_FORMAT_COUNT; i++) {
913 const struct gl_format_info *info = _mesa_get_format_info(i);
914 assert(info);
915
916 assert(info->Name == i);
917
918 if (info->Name == MESA_FORMAT_NONE)
919 continue;
920
921 if (info->BlockWidth == 1 && info->BlockHeight == 1) {
922 if (info->RedBits > 0) {
923 GLuint t = info->RedBits + info->GreenBits
924 + info->BlueBits + info->AlphaBits;
925 assert(t / 8 <= info->BytesPerBlock);
926 (void) t;
927 }
928 }
929
930 assert(info->DataType == GL_UNSIGNED_NORMALIZED ||
931 info->DataType == GL_SIGNED_NORMALIZED ||
932 info->DataType == GL_UNSIGNED_INT ||
933 info->DataType == GL_INT ||
934 info->DataType == GL_FLOAT ||
935 /* Z32_FLOAT_X24S8 has DataType of GL_NONE */
936 info->DataType == GL_NONE);
937
938 if (info->BaseFormat == GL_RGB) {
939 assert(info->RedBits > 0);
940 assert(info->GreenBits > 0);
941 assert(info->BlueBits > 0);
942 assert(info->AlphaBits == 0);
943 assert(info->LuminanceBits == 0);
944 assert(info->IntensityBits == 0);
945 }
946 else if (info->BaseFormat == GL_RGBA) {
947 assert(info->RedBits > 0);
948 assert(info->GreenBits > 0);
949 assert(info->BlueBits > 0);
950 assert(info->AlphaBits > 0);
951 assert(info->LuminanceBits == 0);
952 assert(info->IntensityBits == 0);
953 }
954 else if (info->BaseFormat == GL_RG) {
955 assert(info->RedBits > 0);
956 assert(info->GreenBits > 0);
957 assert(info->BlueBits == 0);
958 assert(info->AlphaBits == 0);
959 assert(info->LuminanceBits == 0);
960 assert(info->IntensityBits == 0);
961 }
962 else if (info->BaseFormat == GL_RED) {
963 assert(info->RedBits > 0);
964 assert(info->GreenBits == 0);
965 assert(info->BlueBits == 0);
966 assert(info->AlphaBits == 0);
967 assert(info->LuminanceBits == 0);
968 assert(info->IntensityBits == 0);
969 }
970 else if (info->BaseFormat == GL_LUMINANCE) {
971 assert(info->RedBits == 0);
972 assert(info->GreenBits == 0);
973 assert(info->BlueBits == 0);
974 assert(info->AlphaBits == 0);
975 assert(info->LuminanceBits > 0);
976 assert(info->IntensityBits == 0);
977 }
978 else if (info->BaseFormat == GL_INTENSITY) {
979 assert(info->RedBits == 0);
980 assert(info->GreenBits == 0);
981 assert(info->BlueBits == 0);
982 assert(info->AlphaBits == 0);
983 assert(info->LuminanceBits == 0);
984 assert(info->IntensityBits > 0);
985 }
986 }
987
988 check_format_to_type_and_comps();
989 }
990
991
992
993 /**
994 * Return datatype and number of components per texel for the given mesa_format.
995 * Only used for mipmap generation code.
996 */
997 void
998 _mesa_format_to_type_and_comps(mesa_format format,
999 GLenum *datatype, GLuint *comps)
1000 {
1001 switch (format) {
1002 case MESA_FORMAT_A8B8G8R8_UNORM:
1003 case MESA_FORMAT_R8G8B8A8_UNORM:
1004 case MESA_FORMAT_B8G8R8A8_UNORM:
1005 case MESA_FORMAT_A8R8G8B8_UNORM:
1006 case MESA_FORMAT_X8B8G8R8_UNORM:
1007 case MESA_FORMAT_R8G8B8X8_UNORM:
1008 case MESA_FORMAT_B8G8R8X8_UNORM:
1009 case MESA_FORMAT_X8R8G8B8_UNORM:
1010 *datatype = GL_UNSIGNED_BYTE;
1011 *comps = 4;
1012 return;
1013 case MESA_FORMAT_BGR_UNORM8:
1014 case MESA_FORMAT_RGB_UNORM8:
1015 *datatype = GL_UNSIGNED_BYTE;
1016 *comps = 3;
1017 return;
1018 case MESA_FORMAT_B5G6R5_UNORM:
1019 case MESA_FORMAT_R5G6B5_UNORM:
1020 *datatype = GL_UNSIGNED_SHORT_5_6_5;
1021 *comps = 3;
1022 return;
1023
1024 case MESA_FORMAT_B4G4R4A4_UNORM:
1025 case MESA_FORMAT_A4R4G4B4_UNORM:
1026 case MESA_FORMAT_B4G4R4X4_UNORM:
1027 *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1028 *comps = 4;
1029 return;
1030
1031 case MESA_FORMAT_B5G5R5A1_UNORM:
1032 case MESA_FORMAT_A1R5G5B5_UNORM:
1033 case MESA_FORMAT_B5G5R5X1_UNORM:
1034 *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
1035 *comps = 4;
1036 return;
1037
1038 case MESA_FORMAT_B10G10R10A2_UNORM:
1039 *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1040 *comps = 4;
1041 return;
1042
1043 case MESA_FORMAT_A1B5G5R5_UNORM:
1044 *datatype = GL_UNSIGNED_SHORT_5_5_5_1;
1045 *comps = 4;
1046 return;
1047
1048 case MESA_FORMAT_L4A4_UNORM:
1049 *datatype = MESA_UNSIGNED_BYTE_4_4;
1050 *comps = 2;
1051 return;
1052
1053 case MESA_FORMAT_L8A8_UNORM:
1054 case MESA_FORMAT_A8L8_UNORM:
1055 case MESA_FORMAT_R8G8_UNORM:
1056 case MESA_FORMAT_G8R8_UNORM:
1057 *datatype = GL_UNSIGNED_BYTE;
1058 *comps = 2;
1059 return;
1060
1061 case MESA_FORMAT_L16A16_UNORM:
1062 case MESA_FORMAT_A16L16_UNORM:
1063 case MESA_FORMAT_R16G16_UNORM:
1064 case MESA_FORMAT_G16R16_UNORM:
1065 *datatype = GL_UNSIGNED_SHORT;
1066 *comps = 2;
1067 return;
1068
1069 case MESA_FORMAT_R_UNORM16:
1070 case MESA_FORMAT_A_UNORM16:
1071 case MESA_FORMAT_L_UNORM16:
1072 case MESA_FORMAT_I_UNORM16:
1073 *datatype = GL_UNSIGNED_SHORT;
1074 *comps = 1;
1075 return;
1076
1077 case MESA_FORMAT_R3G3B2_UNORM:
1078 *datatype = GL_UNSIGNED_BYTE_2_3_3_REV;
1079 *comps = 3;
1080 return;
1081 case MESA_FORMAT_A4B4G4R4_UNORM:
1082 *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1083 *comps = 4;
1084 return;
1085
1086 case MESA_FORMAT_R4G4B4A4_UNORM:
1087 *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1088 *comps = 4;
1089 return;
1090 case MESA_FORMAT_R5G5B5A1_UNORM:
1091 *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
1092 *comps = 4;
1093 return;
1094 case MESA_FORMAT_A2B10G10R10_UNORM:
1095 case MESA_FORMAT_A2B10G10R10_UINT:
1096 *datatype = GL_UNSIGNED_INT_10_10_10_2;
1097 *comps = 4;
1098 return;
1099 case MESA_FORMAT_A2R10G10B10_UNORM:
1100 case MESA_FORMAT_A2R10G10B10_UINT:
1101 *datatype = GL_UNSIGNED_INT_10_10_10_2;
1102 *comps = 4;
1103 return;
1104
1105 case MESA_FORMAT_B2G3R3_UNORM:
1106 *datatype = GL_UNSIGNED_BYTE_3_3_2;
1107 *comps = 3;
1108 return;
1109
1110 case MESA_FORMAT_A_UNORM8:
1111 case MESA_FORMAT_L_UNORM8:
1112 case MESA_FORMAT_I_UNORM8:
1113 case MESA_FORMAT_R_UNORM8:
1114 case MESA_FORMAT_S_UINT8:
1115 *datatype = GL_UNSIGNED_BYTE;
1116 *comps = 1;
1117 return;
1118
1119 case MESA_FORMAT_YCBCR:
1120 case MESA_FORMAT_YCBCR_REV:
1121 *datatype = GL_UNSIGNED_SHORT;
1122 *comps = 2;
1123 return;
1124
1125 case MESA_FORMAT_S8_UINT_Z24_UNORM:
1126 *datatype = GL_UNSIGNED_INT_24_8_MESA;
1127 *comps = 2;
1128 return;
1129
1130 case MESA_FORMAT_Z24_UNORM_S8_UINT:
1131 *datatype = GL_UNSIGNED_INT_8_24_REV_MESA;
1132 *comps = 2;
1133 return;
1134
1135 case MESA_FORMAT_Z_UNORM16:
1136 *datatype = GL_UNSIGNED_SHORT;
1137 *comps = 1;
1138 return;
1139
1140 case MESA_FORMAT_Z24_UNORM_X8_UINT:
1141 *datatype = GL_UNSIGNED_INT;
1142 *comps = 1;
1143 return;
1144
1145 case MESA_FORMAT_X8_UINT_Z24_UNORM:
1146 *datatype = GL_UNSIGNED_INT;
1147 *comps = 1;
1148 return;
1149
1150 case MESA_FORMAT_Z_UNORM32:
1151 *datatype = GL_UNSIGNED_INT;
1152 *comps = 1;
1153 return;
1154
1155 case MESA_FORMAT_Z_FLOAT32:
1156 *datatype = GL_FLOAT;
1157 *comps = 1;
1158 return;
1159
1160 case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
1161 *datatype = GL_FLOAT_32_UNSIGNED_INT_24_8_REV;
1162 *comps = 1;
1163 return;
1164
1165 case MESA_FORMAT_R_SNORM8:
1166 case MESA_FORMAT_A_SNORM8:
1167 case MESA_FORMAT_L_SNORM8:
1168 case MESA_FORMAT_I_SNORM8:
1169 *datatype = GL_BYTE;
1170 *comps = 1;
1171 return;
1172 case MESA_FORMAT_R8G8_SNORM:
1173 case MESA_FORMAT_L8A8_SNORM:
1174 case MESA_FORMAT_A8L8_SNORM:
1175 *datatype = GL_BYTE;
1176 *comps = 2;
1177 return;
1178 case MESA_FORMAT_A8B8G8R8_SNORM:
1179 case MESA_FORMAT_R8G8B8A8_SNORM:
1180 case MESA_FORMAT_X8B8G8R8_SNORM:
1181 *datatype = GL_BYTE;
1182 *comps = 4;
1183 return;
1184
1185 case MESA_FORMAT_RGBA_UNORM16:
1186 *datatype = GL_UNSIGNED_SHORT;
1187 *comps = 4;
1188 return;
1189
1190 case MESA_FORMAT_R_SNORM16:
1191 case MESA_FORMAT_A_SNORM16:
1192 case MESA_FORMAT_L_SNORM16:
1193 case MESA_FORMAT_I_SNORM16:
1194 *datatype = GL_SHORT;
1195 *comps = 1;
1196 return;
1197 case MESA_FORMAT_R16G16_SNORM:
1198 case MESA_FORMAT_LA_SNORM16:
1199 *datatype = GL_SHORT;
1200 *comps = 2;
1201 return;
1202 case MESA_FORMAT_RGB_SNORM16:
1203 *datatype = GL_SHORT;
1204 *comps = 3;
1205 return;
1206 case MESA_FORMAT_RGBA_SNORM16:
1207 *datatype = GL_SHORT;
1208 *comps = 4;
1209 return;
1210
1211 case MESA_FORMAT_BGR_SRGB8:
1212 *datatype = GL_UNSIGNED_BYTE;
1213 *comps = 3;
1214 return;
1215 case MESA_FORMAT_A8B8G8R8_SRGB:
1216 case MESA_FORMAT_B8G8R8A8_SRGB:
1217 case MESA_FORMAT_A8R8G8B8_SRGB:
1218 case MESA_FORMAT_R8G8B8A8_SRGB:
1219 *datatype = GL_UNSIGNED_BYTE;
1220 *comps = 4;
1221 return;
1222 case MESA_FORMAT_L_SRGB8:
1223 *datatype = GL_UNSIGNED_BYTE;
1224 *comps = 1;
1225 return;
1226 case MESA_FORMAT_L8A8_SRGB:
1227 case MESA_FORMAT_A8L8_SRGB:
1228 *datatype = GL_UNSIGNED_BYTE;
1229 *comps = 2;
1230 return;
1231
1232 case MESA_FORMAT_RGB_FXT1:
1233 case MESA_FORMAT_RGBA_FXT1:
1234 case MESA_FORMAT_RGB_DXT1:
1235 case MESA_FORMAT_RGBA_DXT1:
1236 case MESA_FORMAT_RGBA_DXT3:
1237 case MESA_FORMAT_RGBA_DXT5:
1238 case MESA_FORMAT_SRGB_DXT1:
1239 case MESA_FORMAT_SRGBA_DXT1:
1240 case MESA_FORMAT_SRGBA_DXT3:
1241 case MESA_FORMAT_SRGBA_DXT5:
1242 case MESA_FORMAT_R_RGTC1_UNORM:
1243 case MESA_FORMAT_R_RGTC1_SNORM:
1244 case MESA_FORMAT_RG_RGTC2_UNORM:
1245 case MESA_FORMAT_RG_RGTC2_SNORM:
1246 case MESA_FORMAT_L_LATC1_UNORM:
1247 case MESA_FORMAT_L_LATC1_SNORM:
1248 case MESA_FORMAT_LA_LATC2_UNORM:
1249 case MESA_FORMAT_LA_LATC2_SNORM:
1250 case MESA_FORMAT_ETC1_RGB8:
1251 case MESA_FORMAT_ETC2_RGB8:
1252 case MESA_FORMAT_ETC2_SRGB8:
1253 case MESA_FORMAT_ETC2_RGBA8_EAC:
1254 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
1255 case MESA_FORMAT_ETC2_R11_EAC:
1256 case MESA_FORMAT_ETC2_RG11_EAC:
1257 case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
1258 case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
1259 case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
1260 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
1261 case MESA_FORMAT_BPTC_RGBA_UNORM:
1262 case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
1263 case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
1264 case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
1265 /* XXX generate error instead? */
1266 *datatype = GL_UNSIGNED_BYTE;
1267 *comps = 0;
1268 return;
1269
1270 case MESA_FORMAT_RGBA_FLOAT32:
1271 *datatype = GL_FLOAT;
1272 *comps = 4;
1273 return;
1274 case MESA_FORMAT_RGBA_FLOAT16:
1275 *datatype = GL_HALF_FLOAT_ARB;
1276 *comps = 4;
1277 return;
1278 case MESA_FORMAT_RGB_FLOAT32:
1279 *datatype = GL_FLOAT;
1280 *comps = 3;
1281 return;
1282 case MESA_FORMAT_RGB_FLOAT16:
1283 *datatype = GL_HALF_FLOAT_ARB;
1284 *comps = 3;
1285 return;
1286 case MESA_FORMAT_LA_FLOAT32:
1287 case MESA_FORMAT_RG_FLOAT32:
1288 *datatype = GL_FLOAT;
1289 *comps = 2;
1290 return;
1291 case MESA_FORMAT_LA_FLOAT16:
1292 case MESA_FORMAT_RG_FLOAT16:
1293 *datatype = GL_HALF_FLOAT_ARB;
1294 *comps = 2;
1295 return;
1296 case MESA_FORMAT_A_FLOAT32:
1297 case MESA_FORMAT_L_FLOAT32:
1298 case MESA_FORMAT_I_FLOAT32:
1299 case MESA_FORMAT_R_FLOAT32:
1300 *datatype = GL_FLOAT;
1301 *comps = 1;
1302 return;
1303 case MESA_FORMAT_A_FLOAT16:
1304 case MESA_FORMAT_L_FLOAT16:
1305 case MESA_FORMAT_I_FLOAT16:
1306 case MESA_FORMAT_R_FLOAT16:
1307 *datatype = GL_HALF_FLOAT_ARB;
1308 *comps = 1;
1309 return;
1310
1311 case MESA_FORMAT_A_UINT8:
1312 case MESA_FORMAT_L_UINT8:
1313 case MESA_FORMAT_I_UINT8:
1314 *datatype = GL_UNSIGNED_BYTE;
1315 *comps = 1;
1316 return;
1317 case MESA_FORMAT_LA_UINT8:
1318 *datatype = GL_UNSIGNED_BYTE;
1319 *comps = 2;
1320 return;
1321
1322 case MESA_FORMAT_A_UINT16:
1323 case MESA_FORMAT_L_UINT16:
1324 case MESA_FORMAT_I_UINT16:
1325 *datatype = GL_UNSIGNED_SHORT;
1326 *comps = 1;
1327 return;
1328 case MESA_FORMAT_LA_UINT16:
1329 *datatype = GL_UNSIGNED_SHORT;
1330 *comps = 2;
1331 return;
1332 case MESA_FORMAT_A_UINT32:
1333 case MESA_FORMAT_L_UINT32:
1334 case MESA_FORMAT_I_UINT32:
1335 *datatype = GL_UNSIGNED_INT;
1336 *comps = 1;
1337 return;
1338 case MESA_FORMAT_LA_UINT32:
1339 *datatype = GL_UNSIGNED_INT;
1340 *comps = 2;
1341 return;
1342 case MESA_FORMAT_A_SINT8:
1343 case MESA_FORMAT_L_SINT8:
1344 case MESA_FORMAT_I_SINT8:
1345 *datatype = GL_BYTE;
1346 *comps = 1;
1347 return;
1348 case MESA_FORMAT_LA_SINT8:
1349 *datatype = GL_BYTE;
1350 *comps = 2;
1351 return;
1352
1353 case MESA_FORMAT_A_SINT16:
1354 case MESA_FORMAT_L_SINT16:
1355 case MESA_FORMAT_I_SINT16:
1356 *datatype = GL_SHORT;
1357 *comps = 1;
1358 return;
1359 case MESA_FORMAT_LA_SINT16:
1360 *datatype = GL_SHORT;
1361 *comps = 2;
1362 return;
1363
1364 case MESA_FORMAT_A_SINT32:
1365 case MESA_FORMAT_L_SINT32:
1366 case MESA_FORMAT_I_SINT32:
1367 *datatype = GL_INT;
1368 *comps = 1;
1369 return;
1370 case MESA_FORMAT_LA_SINT32:
1371 *datatype = GL_INT;
1372 *comps = 2;
1373 return;
1374
1375 case MESA_FORMAT_R_SINT8:
1376 *datatype = GL_BYTE;
1377 *comps = 1;
1378 return;
1379 case MESA_FORMAT_RG_SINT8:
1380 *datatype = GL_BYTE;
1381 *comps = 2;
1382 return;
1383 case MESA_FORMAT_RGB_SINT8:
1384 *datatype = GL_BYTE;
1385 *comps = 3;
1386 return;
1387 case MESA_FORMAT_RGBA_SINT8:
1388 *datatype = GL_BYTE;
1389 *comps = 4;
1390 return;
1391 case MESA_FORMAT_R_SINT16:
1392 *datatype = GL_SHORT;
1393 *comps = 1;
1394 return;
1395 case MESA_FORMAT_RG_SINT16:
1396 *datatype = GL_SHORT;
1397 *comps = 2;
1398 return;
1399 case MESA_FORMAT_RGB_SINT16:
1400 *datatype = GL_SHORT;
1401 *comps = 3;
1402 return;
1403 case MESA_FORMAT_RGBA_SINT16:
1404 *datatype = GL_SHORT;
1405 *comps = 4;
1406 return;
1407 case MESA_FORMAT_R_SINT32:
1408 *datatype = GL_INT;
1409 *comps = 1;
1410 return;
1411 case MESA_FORMAT_RG_SINT32:
1412 *datatype = GL_INT;
1413 *comps = 2;
1414 return;
1415 case MESA_FORMAT_RGB_SINT32:
1416 *datatype = GL_INT;
1417 *comps = 3;
1418 return;
1419 case MESA_FORMAT_RGBA_SINT32:
1420 *datatype = GL_INT;
1421 *comps = 4;
1422 return;
1423
1424 /**
1425 * \name Non-normalized unsigned integer formats.
1426 */
1427 case MESA_FORMAT_R_UINT8:
1428 *datatype = GL_UNSIGNED_BYTE;
1429 *comps = 1;
1430 return;
1431 case MESA_FORMAT_RG_UINT8:
1432 *datatype = GL_UNSIGNED_BYTE;
1433 *comps = 2;
1434 return;
1435 case MESA_FORMAT_RGB_UINT8:
1436 *datatype = GL_UNSIGNED_BYTE;
1437 *comps = 3;
1438 return;
1439 case MESA_FORMAT_RGBA_UINT8:
1440 *datatype = GL_UNSIGNED_BYTE;
1441 *comps = 4;
1442 return;
1443 case MESA_FORMAT_R_UINT16:
1444 *datatype = GL_UNSIGNED_SHORT;
1445 *comps = 1;
1446 return;
1447 case MESA_FORMAT_RG_UINT16:
1448 *datatype = GL_UNSIGNED_SHORT;
1449 *comps = 2;
1450 return;
1451 case MESA_FORMAT_RGB_UINT16:
1452 *datatype = GL_UNSIGNED_SHORT;
1453 *comps = 3;
1454 return;
1455 case MESA_FORMAT_RGBA_UINT16:
1456 *datatype = GL_UNSIGNED_SHORT;
1457 *comps = 4;
1458 return;
1459 case MESA_FORMAT_R_UINT32:
1460 *datatype = GL_UNSIGNED_INT;
1461 *comps = 1;
1462 return;
1463 case MESA_FORMAT_RG_UINT32:
1464 *datatype = GL_UNSIGNED_INT;
1465 *comps = 2;
1466 return;
1467 case MESA_FORMAT_RGB_UINT32:
1468 *datatype = GL_UNSIGNED_INT;
1469 *comps = 3;
1470 return;
1471 case MESA_FORMAT_RGBA_UINT32:
1472 *datatype = GL_UNSIGNED_INT;
1473 *comps = 4;
1474 return;
1475
1476 case MESA_FORMAT_R9G9B9E5_FLOAT:
1477 *datatype = GL_UNSIGNED_INT_5_9_9_9_REV;
1478 *comps = 3;
1479 return;
1480
1481 case MESA_FORMAT_R11G11B10_FLOAT:
1482 *datatype = GL_UNSIGNED_INT_10F_11F_11F_REV;
1483 *comps = 3;
1484 return;
1485
1486 case MESA_FORMAT_B10G10R10A2_UINT:
1487 case MESA_FORMAT_R10G10B10A2_UINT:
1488 *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1489 *comps = 4;
1490 return;
1491
1492 case MESA_FORMAT_R8G8B8X8_SRGB:
1493 case MESA_FORMAT_X8B8G8R8_SRGB:
1494 case MESA_FORMAT_RGBX_UINT8:
1495 *datatype = GL_UNSIGNED_BYTE;
1496 *comps = 4;
1497 return;
1498
1499 case MESA_FORMAT_R8G8B8X8_SNORM:
1500 case MESA_FORMAT_RGBX_SINT8:
1501 *datatype = GL_BYTE;
1502 *comps = 4;
1503 return;
1504
1505 case MESA_FORMAT_B10G10R10X2_UNORM:
1506 case MESA_FORMAT_R10G10B10X2_UNORM:
1507 *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1508 *comps = 4;
1509 return;
1510
1511 case MESA_FORMAT_RGBX_UNORM16:
1512 case MESA_FORMAT_RGBX_UINT16:
1513 *datatype = GL_UNSIGNED_SHORT;
1514 *comps = 4;
1515 return;
1516
1517 case MESA_FORMAT_RGBX_SNORM16:
1518 case MESA_FORMAT_RGBX_SINT16:
1519 *datatype = GL_SHORT;
1520 *comps = 4;
1521 return;
1522
1523 case MESA_FORMAT_RGBX_FLOAT16:
1524 *datatype = GL_HALF_FLOAT;
1525 *comps = 4;
1526 return;
1527
1528 case MESA_FORMAT_RGBX_FLOAT32:
1529 *datatype = GL_FLOAT;
1530 *comps = 4;
1531 return;
1532
1533 case MESA_FORMAT_RGBX_UINT32:
1534 *datatype = GL_UNSIGNED_INT;
1535 *comps = 4;
1536 return;
1537
1538 case MESA_FORMAT_RGBX_SINT32:
1539 *datatype = GL_INT;
1540 *comps = 4;
1541 return;
1542
1543 case MESA_FORMAT_R10G10B10A2_UNORM:
1544 *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1545 *comps = 4;
1546 return;
1547
1548 case MESA_FORMAT_G8R8_SNORM:
1549 *datatype = GL_BYTE;
1550 *comps = 2;
1551 return;
1552
1553 case MESA_FORMAT_G16R16_SNORM:
1554 *datatype = GL_SHORT;
1555 *comps = 2;
1556 return;
1557
1558 case MESA_FORMAT_B8G8R8X8_SRGB:
1559 case MESA_FORMAT_X8R8G8B8_SRGB:
1560 *datatype = GL_UNSIGNED_BYTE;
1561 *comps = 4;
1562 return;
1563
1564 case MESA_FORMAT_COUNT:
1565 assert(0);
1566 return;
1567
1568 case MESA_FORMAT_NONE:
1569 /* For debug builds, warn if any formats are not handled */
1570 #ifdef DEBUG
1571 default:
1572 #endif
1573 _mesa_problem(NULL, "bad format %s in _mesa_format_to_type_and_comps",
1574 _mesa_get_format_name(format));
1575 *datatype = 0;
1576 *comps = 1;
1577 }
1578 }
1579
1580 /**
1581 * Check if a mesa_format exactly matches a GL format/type combination
1582 * such that we can use memcpy() from one to the other.
1583 * \param mesa_format a MESA_FORMAT_x value
1584 * \param format the user-specified image format
1585 * \param type the user-specified image datatype
1586 * \param swapBytes typically the current pixel pack/unpack byteswap state
1587 * \return GL_TRUE if the formats match, GL_FALSE otherwise.
1588 */
1589 GLboolean
1590 _mesa_format_matches_format_and_type(mesa_format mesa_format,
1591 GLenum format, GLenum type,
1592 GLboolean swapBytes)
1593 {
1594 const GLboolean littleEndian = _mesa_little_endian();
1595
1596 /* Note: When reading a GL format/type combination, the format lists channel
1597 * assignments from most significant channel in the type to least
1598 * significant. A type with _REV indicates that the assignments are
1599 * swapped, so they are listed from least significant to most significant.
1600 *
1601 * For sanity, please keep this switch statement ordered the same as the
1602 * enums in formats.h.
1603 */
1604
1605 switch (mesa_format) {
1606
1607 case MESA_FORMAT_NONE:
1608 case MESA_FORMAT_COUNT:
1609 return GL_FALSE;
1610
1611 case MESA_FORMAT_A8B8G8R8_UNORM:
1612 case MESA_FORMAT_A8B8G8R8_SRGB:
1613 if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1614 return GL_TRUE;
1615
1616 if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV && swapBytes)
1617 return GL_TRUE;
1618
1619 if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && !littleEndian)
1620 return GL_TRUE;
1621
1622 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV
1623 && !swapBytes)
1624 return GL_TRUE;
1625
1626 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8
1627 && swapBytes)
1628 return GL_TRUE;
1629
1630 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && littleEndian)
1631 return GL_TRUE;
1632
1633 return GL_FALSE;
1634
1635 case MESA_FORMAT_R8G8B8A8_UNORM:
1636 case MESA_FORMAT_R8G8B8A8_SRGB:
1637 if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1638 !swapBytes)
1639 return GL_TRUE;
1640
1641 if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1642 return GL_TRUE;
1643
1644 if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && littleEndian)
1645 return GL_TRUE;
1646
1647 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8 &&
1648 !swapBytes)
1649 return GL_TRUE;
1650
1651 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1652 swapBytes)
1653 return GL_TRUE;
1654
1655 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && !littleEndian)
1656 return GL_TRUE;
1657
1658 return GL_FALSE;
1659
1660 case MESA_FORMAT_B8G8R8A8_UNORM:
1661 case MESA_FORMAT_B8G8R8A8_SRGB:
1662 if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1663 !swapBytes)
1664 return GL_TRUE;
1665
1666 if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1667 return GL_TRUE;
1668
1669 if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && littleEndian)
1670 return GL_TRUE;
1671
1672 return GL_FALSE;
1673
1674 case MESA_FORMAT_A8R8G8B8_UNORM:
1675 case MESA_FORMAT_A8R8G8B8_SRGB:
1676 if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1677 return GL_TRUE;
1678
1679 if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1680 swapBytes)
1681 return GL_TRUE;
1682
1683 if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && !littleEndian)
1684 return GL_TRUE;
1685
1686 return GL_FALSE;
1687
1688 case MESA_FORMAT_X8B8G8R8_UNORM:
1689 case MESA_FORMAT_R8G8B8X8_UNORM:
1690 return GL_FALSE;
1691
1692 case MESA_FORMAT_B8G8R8X8_UNORM:
1693 case MESA_FORMAT_X8R8G8B8_UNORM:
1694 return GL_FALSE;
1695
1696 case MESA_FORMAT_BGR_UNORM8:
1697 case MESA_FORMAT_BGR_SRGB8:
1698 return format == GL_BGR && type == GL_UNSIGNED_BYTE && littleEndian;
1699
1700 case MESA_FORMAT_RGB_UNORM8:
1701 return format == GL_RGB && type == GL_UNSIGNED_BYTE && littleEndian;
1702
1703 case MESA_FORMAT_B5G6R5_UNORM:
1704 return ((format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) ||
1705 (format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1706 !swapBytes;
1707
1708 case MESA_FORMAT_R5G6B5_UNORM:
1709 return ((format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5) ||
1710 (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1711 !swapBytes;
1712
1713 case MESA_FORMAT_B4G4R4A4_UNORM:
1714 return format == GL_BGRA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV &&
1715 !swapBytes;
1716
1717 case MESA_FORMAT_A4R4G4B4_UNORM:
1718 return GL_FALSE;
1719
1720 case MESA_FORMAT_A1B5G5R5_UNORM:
1721 return format == GL_RGBA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1722 !swapBytes;
1723
1724 case MESA_FORMAT_B5G5R5A1_UNORM:
1725 return format == GL_BGRA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV &&
1726 !swapBytes;
1727
1728 case MESA_FORMAT_A1R5G5B5_UNORM:
1729 return format == GL_BGRA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1730 !swapBytes;
1731
1732 case MESA_FORMAT_L4A4_UNORM:
1733 return GL_FALSE;
1734 case MESA_FORMAT_L8A8_UNORM:
1735 case MESA_FORMAT_L8A8_SRGB:
1736 return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_BYTE && littleEndian;
1737 case MESA_FORMAT_A8L8_UNORM:
1738 case MESA_FORMAT_A8L8_SRGB:
1739 return GL_FALSE;
1740
1741 case MESA_FORMAT_L16A16_UNORM:
1742 return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_SHORT && littleEndian && !swapBytes;
1743 case MESA_FORMAT_A16L16_UNORM:
1744 return GL_FALSE;
1745
1746 case MESA_FORMAT_B2G3R3_UNORM:
1747 return format == GL_RGB && type == GL_UNSIGNED_BYTE_3_3_2;
1748
1749 case MESA_FORMAT_R3G3B2_UNORM:
1750 return format == GL_RGB && type == GL_UNSIGNED_BYTE_2_3_3_REV;
1751
1752 case MESA_FORMAT_A4B4G4R4_UNORM:
1753 if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1754 return GL_TRUE;
1755
1756 if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1757 return GL_TRUE;
1758
1759 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1760 return GL_TRUE;
1761
1762 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1763 return GL_TRUE;
1764
1765 return GL_FALSE;
1766
1767 case MESA_FORMAT_R4G4B4A4_UNORM:
1768 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1769 return GL_TRUE;
1770
1771 if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1772 return GL_TRUE;
1773
1774 if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1775 return GL_TRUE;
1776
1777 if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1778 return GL_TRUE;
1779
1780 return GL_FALSE;
1781
1782 case MESA_FORMAT_R5G5B5A1_UNORM:
1783 return format == GL_RGBA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV;
1784
1785 case MESA_FORMAT_A2B10G10R10_UNORM:
1786 return format == GL_RGBA && type == GL_UNSIGNED_INT_10_10_10_2;
1787
1788 case MESA_FORMAT_A2B10G10R10_UINT:
1789 return format == GL_RGBA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1790
1791 case MESA_FORMAT_A2R10G10B10_UNORM:
1792 return format == GL_BGRA && type == GL_UNSIGNED_INT_10_10_10_2;
1793
1794 case MESA_FORMAT_A2R10G10B10_UINT:
1795 return format == GL_BGRA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1796
1797 case MESA_FORMAT_A_UNORM8:
1798 return format == GL_ALPHA && type == GL_UNSIGNED_BYTE;
1799 case MESA_FORMAT_A_UNORM16:
1800 return format == GL_ALPHA && type == GL_UNSIGNED_SHORT && !swapBytes;
1801 case MESA_FORMAT_L_UNORM8:
1802 case MESA_FORMAT_L_SRGB8:
1803 return format == GL_LUMINANCE && type == GL_UNSIGNED_BYTE;
1804 case MESA_FORMAT_L_UNORM16:
1805 return format == GL_LUMINANCE && type == GL_UNSIGNED_SHORT && !swapBytes;
1806 case MESA_FORMAT_I_UNORM8:
1807 return format == GL_RED && type == GL_UNSIGNED_BYTE;
1808 case MESA_FORMAT_I_UNORM16:
1809 return format == GL_RED && type == GL_UNSIGNED_SHORT && !swapBytes;
1810
1811 case MESA_FORMAT_YCBCR:
1812 return format == GL_YCBCR_MESA &&
1813 ((type == GL_UNSIGNED_SHORT_8_8_MESA && littleEndian != swapBytes) ||
1814 (type == GL_UNSIGNED_SHORT_8_8_REV_MESA && littleEndian == swapBytes));
1815 case MESA_FORMAT_YCBCR_REV:
1816 return format == GL_YCBCR_MESA &&
1817 ((type == GL_UNSIGNED_SHORT_8_8_MESA && littleEndian == swapBytes) ||
1818 (type == GL_UNSIGNED_SHORT_8_8_REV_MESA && littleEndian != swapBytes));
1819
1820 case MESA_FORMAT_R_UNORM8:
1821 return format == GL_RED && type == GL_UNSIGNED_BYTE;
1822 case MESA_FORMAT_R8G8_UNORM:
1823 return format == GL_RG && type == GL_UNSIGNED_BYTE && littleEndian;
1824 case MESA_FORMAT_G8R8_UNORM:
1825 return GL_FALSE;
1826
1827 case MESA_FORMAT_R_UNORM16:
1828 return format == GL_RED && type == GL_UNSIGNED_SHORT &&
1829 !swapBytes;
1830 case MESA_FORMAT_R16G16_UNORM:
1831 return format == GL_RG && type == GL_UNSIGNED_SHORT && littleEndian &&
1832 !swapBytes;
1833 case MESA_FORMAT_G16R16_UNORM:
1834 return GL_FALSE;
1835
1836 case MESA_FORMAT_B10G10R10A2_UNORM:
1837 return format == GL_BGRA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1838 !swapBytes;
1839
1840 case MESA_FORMAT_S8_UINT_Z24_UNORM:
1841 return format == GL_DEPTH_STENCIL && type == GL_UNSIGNED_INT_24_8 &&
1842 !swapBytes;
1843 case MESA_FORMAT_X8_UINT_Z24_UNORM:
1844 case MESA_FORMAT_Z24_UNORM_S8_UINT:
1845 return GL_FALSE;
1846
1847 case MESA_FORMAT_Z_UNORM16:
1848 return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_SHORT &&
1849 !swapBytes;
1850
1851 case MESA_FORMAT_Z24_UNORM_X8_UINT:
1852 return GL_FALSE;
1853
1854 case MESA_FORMAT_Z_UNORM32:
1855 return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_INT &&
1856 !swapBytes;
1857
1858 case MESA_FORMAT_S_UINT8:
1859 return format == GL_STENCIL_INDEX && type == GL_UNSIGNED_BYTE;
1860
1861 case MESA_FORMAT_SRGB_DXT1:
1862 case MESA_FORMAT_SRGBA_DXT1:
1863 case MESA_FORMAT_SRGBA_DXT3:
1864 case MESA_FORMAT_SRGBA_DXT5:
1865 return GL_FALSE;
1866
1867 case MESA_FORMAT_RGB_FXT1:
1868 case MESA_FORMAT_RGBA_FXT1:
1869 case MESA_FORMAT_RGB_DXT1:
1870 case MESA_FORMAT_RGBA_DXT1:
1871 case MESA_FORMAT_RGBA_DXT3:
1872 case MESA_FORMAT_RGBA_DXT5:
1873 return GL_FALSE;
1874
1875 case MESA_FORMAT_BPTC_RGBA_UNORM:
1876 case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
1877 case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
1878 case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
1879 return GL_FALSE;
1880
1881 case MESA_FORMAT_RGBA_FLOAT32:
1882 return format == GL_RGBA && type == GL_FLOAT && !swapBytes;
1883 case MESA_FORMAT_RGBA_FLOAT16:
1884 return format == GL_RGBA && type == GL_HALF_FLOAT && !swapBytes;
1885
1886 case MESA_FORMAT_RGB_FLOAT32:
1887 return format == GL_RGB && type == GL_FLOAT && !swapBytes;
1888 case MESA_FORMAT_RGB_FLOAT16:
1889 return format == GL_RGB && type == GL_HALF_FLOAT && !swapBytes;
1890
1891 case MESA_FORMAT_A_FLOAT32:
1892 return format == GL_ALPHA && type == GL_FLOAT && !swapBytes;
1893 case MESA_FORMAT_A_FLOAT16:
1894 return format == GL_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1895
1896 case MESA_FORMAT_L_FLOAT32:
1897 return format == GL_LUMINANCE && type == GL_FLOAT && !swapBytes;
1898 case MESA_FORMAT_L_FLOAT16:
1899 return format == GL_LUMINANCE && type == GL_HALF_FLOAT && !swapBytes;
1900
1901 case MESA_FORMAT_LA_FLOAT32:
1902 return format == GL_LUMINANCE_ALPHA && type == GL_FLOAT && !swapBytes;
1903 case MESA_FORMAT_LA_FLOAT16:
1904 return format == GL_LUMINANCE_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1905
1906 case MESA_FORMAT_I_FLOAT32:
1907 return format == GL_RED && type == GL_FLOAT && !swapBytes;
1908 case MESA_FORMAT_I_FLOAT16:
1909 return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1910
1911 case MESA_FORMAT_R_FLOAT32:
1912 return format == GL_RED && type == GL_FLOAT && !swapBytes;
1913 case MESA_FORMAT_R_FLOAT16:
1914 return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1915
1916 case MESA_FORMAT_RG_FLOAT32:
1917 return format == GL_RG && type == GL_FLOAT && !swapBytes;
1918 case MESA_FORMAT_RG_FLOAT16:
1919 return format == GL_RG && type == GL_HALF_FLOAT && !swapBytes;
1920
1921 case MESA_FORMAT_A_UINT8:
1922 return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_BYTE;
1923 case MESA_FORMAT_A_UINT16:
1924 return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_SHORT &&
1925 !swapBytes;
1926 case MESA_FORMAT_A_UINT32:
1927 return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_INT &&
1928 !swapBytes;
1929 case MESA_FORMAT_A_SINT8:
1930 return format == GL_ALPHA_INTEGER && type == GL_BYTE;
1931 case MESA_FORMAT_A_SINT16:
1932 return format == GL_ALPHA_INTEGER && type == GL_SHORT && !swapBytes;
1933 case MESA_FORMAT_A_SINT32:
1934 return format == GL_ALPHA_INTEGER && type == GL_INT && !swapBytes;
1935
1936 case MESA_FORMAT_I_UINT8:
1937 return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
1938 case MESA_FORMAT_I_UINT16:
1939 return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
1940 case MESA_FORMAT_I_UINT32:
1941 return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1942 case MESA_FORMAT_I_SINT8:
1943 return format == GL_RED_INTEGER && type == GL_BYTE;
1944 case MESA_FORMAT_I_SINT16:
1945 return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1946 case MESA_FORMAT_I_SINT32:
1947 return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
1948
1949 case MESA_FORMAT_L_UINT8:
1950 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_BYTE;
1951 case MESA_FORMAT_L_UINT16:
1952 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_SHORT &&
1953 !swapBytes;
1954 case MESA_FORMAT_L_UINT32:
1955 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_INT &&
1956 !swapBytes;
1957 case MESA_FORMAT_L_SINT8:
1958 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_BYTE;
1959 case MESA_FORMAT_L_SINT16:
1960 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_SHORT &&
1961 !swapBytes;
1962 case MESA_FORMAT_L_SINT32:
1963 return format == GL_LUMINANCE_INTEGER_EXT && type == GL_INT && !swapBytes;
1964
1965 case MESA_FORMAT_LA_UINT8:
1966 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1967 type == GL_UNSIGNED_BYTE && !swapBytes;
1968 case MESA_FORMAT_LA_UINT16:
1969 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1970 type == GL_UNSIGNED_SHORT && !swapBytes;
1971 case MESA_FORMAT_LA_UINT32:
1972 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1973 type == GL_UNSIGNED_INT && !swapBytes;
1974 case MESA_FORMAT_LA_SINT8:
1975 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_BYTE &&
1976 !swapBytes;
1977 case MESA_FORMAT_LA_SINT16:
1978 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_SHORT &&
1979 !swapBytes;
1980 case MESA_FORMAT_LA_SINT32:
1981 return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_INT &&
1982 !swapBytes;
1983
1984 case MESA_FORMAT_R_SINT8:
1985 return format == GL_RED_INTEGER && type == GL_BYTE;
1986 case MESA_FORMAT_RG_SINT8:
1987 return format == GL_RG_INTEGER && type == GL_BYTE && !swapBytes;
1988 case MESA_FORMAT_RGB_SINT8:
1989 return format == GL_RGB_INTEGER && type == GL_BYTE && !swapBytes;
1990 case MESA_FORMAT_RGBA_SINT8:
1991 return format == GL_RGBA_INTEGER && type == GL_BYTE && !swapBytes;
1992 case MESA_FORMAT_R_SINT16:
1993 return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1994 case MESA_FORMAT_RG_SINT16:
1995 return format == GL_RG_INTEGER && type == GL_SHORT && !swapBytes;
1996 case MESA_FORMAT_RGB_SINT16:
1997 return format == GL_RGB_INTEGER && type == GL_SHORT && !swapBytes;
1998 case MESA_FORMAT_RGBA_SINT16:
1999 return format == GL_RGBA_INTEGER && type == GL_SHORT && !swapBytes;
2000 case MESA_FORMAT_R_SINT32:
2001 return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
2002 case MESA_FORMAT_RG_SINT32:
2003 return format == GL_RG_INTEGER && type == GL_INT && !swapBytes;
2004 case MESA_FORMAT_RGB_SINT32:
2005 return format == GL_RGB_INTEGER && type == GL_INT && !swapBytes;
2006 case MESA_FORMAT_RGBA_SINT32:
2007 return format == GL_RGBA_INTEGER && type == GL_INT && !swapBytes;
2008
2009 case MESA_FORMAT_R_UINT8:
2010 return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
2011 case MESA_FORMAT_RG_UINT8:
2012 return format == GL_RG_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
2013 case MESA_FORMAT_RGB_UINT8:
2014 return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
2015 case MESA_FORMAT_RGBA_UINT8:
2016 return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_BYTE &&
2017 !swapBytes;
2018 case MESA_FORMAT_R_UINT16:
2019 return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT &&
2020 !swapBytes;
2021 case MESA_FORMAT_RG_UINT16:
2022 return format == GL_RG_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
2023 case MESA_FORMAT_RGB_UINT16:
2024 return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT &&
2025 !swapBytes;
2026 case MESA_FORMAT_RGBA_UINT16:
2027 return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT &&
2028 !swapBytes;
2029 case MESA_FORMAT_R_UINT32:
2030 return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
2031 case MESA_FORMAT_RG_UINT32:
2032 return format == GL_RG_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
2033 case MESA_FORMAT_RGB_UINT32:
2034 return format == GL_RGB_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
2035 case MESA_FORMAT_RGBA_UINT32:
2036 return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
2037
2038 case MESA_FORMAT_R_SNORM8:
2039 return format == GL_RED && type == GL_BYTE;
2040 case MESA_FORMAT_R8G8_SNORM:
2041 return format == GL_RG && type == GL_BYTE && littleEndian &&
2042 !swapBytes;
2043 case MESA_FORMAT_X8B8G8R8_SNORM:
2044 return GL_FALSE;
2045
2046 case MESA_FORMAT_A8B8G8R8_SNORM:
2047 if (format == GL_RGBA && type == GL_BYTE && !littleEndian)
2048 return GL_TRUE;
2049
2050 if (format == GL_ABGR_EXT && type == GL_BYTE && littleEndian)
2051 return GL_TRUE;
2052
2053 return GL_FALSE;
2054
2055 case MESA_FORMAT_R8G8B8A8_SNORM:
2056 if (format == GL_RGBA && type == GL_BYTE && littleEndian)
2057 return GL_TRUE;
2058
2059 if (format == GL_ABGR_EXT && type == GL_BYTE && !littleEndian)
2060 return GL_TRUE;
2061
2062 return GL_FALSE;
2063
2064 case MESA_FORMAT_R_SNORM16:
2065 return format == GL_RED && type == GL_SHORT &&
2066 !swapBytes;
2067 case MESA_FORMAT_R16G16_SNORM:
2068 return format == GL_RG && type == GL_SHORT && littleEndian && !swapBytes;
2069 case MESA_FORMAT_RGB_SNORM16:
2070 return format == GL_RGB && type == GL_SHORT && !swapBytes;
2071 case MESA_FORMAT_RGBA_SNORM16:
2072 return format == GL_RGBA && type == GL_SHORT && !swapBytes;
2073 case MESA_FORMAT_RGBA_UNORM16:
2074 return format == GL_RGBA && type == GL_UNSIGNED_SHORT &&
2075 !swapBytes;
2076
2077 case MESA_FORMAT_R_RGTC1_UNORM:
2078 case MESA_FORMAT_R_RGTC1_SNORM:
2079 case MESA_FORMAT_RG_RGTC2_UNORM:
2080 case MESA_FORMAT_RG_RGTC2_SNORM:
2081 return GL_FALSE;
2082
2083 case MESA_FORMAT_L_LATC1_UNORM:
2084 case MESA_FORMAT_L_LATC1_SNORM:
2085 case MESA_FORMAT_LA_LATC2_UNORM:
2086 case MESA_FORMAT_LA_LATC2_SNORM:
2087 return GL_FALSE;
2088
2089 case MESA_FORMAT_ETC1_RGB8:
2090 case MESA_FORMAT_ETC2_RGB8:
2091 case MESA_FORMAT_ETC2_SRGB8:
2092 case MESA_FORMAT_ETC2_RGBA8_EAC:
2093 case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
2094 case MESA_FORMAT_ETC2_R11_EAC:
2095 case MESA_FORMAT_ETC2_RG11_EAC:
2096 case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
2097 case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
2098 case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
2099 case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
2100 return GL_FALSE;
2101
2102 case MESA_FORMAT_A_SNORM8:
2103 return format == GL_ALPHA && type == GL_BYTE;
2104 case MESA_FORMAT_L_SNORM8:
2105 return format == GL_LUMINANCE && type == GL_BYTE;
2106 case MESA_FORMAT_L8A8_SNORM:
2107 return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
2108 littleEndian && !swapBytes;
2109 case MESA_FORMAT_A8L8_SNORM:
2110 return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
2111 !littleEndian && !swapBytes;
2112 case MESA_FORMAT_I_SNORM8:
2113 return format == GL_RED && type == GL_BYTE;
2114 case MESA_FORMAT_A_SNORM16:
2115 return format == GL_ALPHA && type == GL_SHORT && !swapBytes;
2116 case MESA_FORMAT_L_SNORM16:
2117 return format == GL_LUMINANCE && type == GL_SHORT && !swapBytes;
2118 case MESA_FORMAT_LA_SNORM16:
2119 return format == GL_LUMINANCE_ALPHA && type == GL_SHORT &&
2120 littleEndian && !swapBytes;
2121 case MESA_FORMAT_I_SNORM16:
2122 return format == GL_RED && type == GL_SHORT && littleEndian &&
2123 !swapBytes;
2124
2125 case MESA_FORMAT_B10G10R10A2_UINT:
2126 return (format == GL_BGRA_INTEGER_EXT &&
2127 type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2128 !swapBytes);
2129
2130 case MESA_FORMAT_R10G10B10A2_UINT:
2131 return (format == GL_RGBA_INTEGER_EXT &&
2132 type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2133 !swapBytes);
2134
2135 case MESA_FORMAT_R9G9B9E5_FLOAT:
2136 return format == GL_RGB && type == GL_UNSIGNED_INT_5_9_9_9_REV &&
2137 !swapBytes;
2138
2139 case MESA_FORMAT_R11G11B10_FLOAT:
2140 return format == GL_RGB && type == GL_UNSIGNED_INT_10F_11F_11F_REV &&
2141 !swapBytes;
2142
2143 case MESA_FORMAT_Z_FLOAT32:
2144 return format == GL_DEPTH_COMPONENT && type == GL_FLOAT && !swapBytes;
2145
2146 case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
2147 return format == GL_DEPTH_STENCIL &&
2148 type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV && !swapBytes;
2149
2150 case MESA_FORMAT_B4G4R4X4_UNORM:
2151 case MESA_FORMAT_B5G5R5X1_UNORM:
2152 case MESA_FORMAT_R8G8B8X8_SNORM:
2153 case MESA_FORMAT_R8G8B8X8_SRGB:
2154 case MESA_FORMAT_X8B8G8R8_SRGB:
2155 case MESA_FORMAT_RGBX_UINT8:
2156 case MESA_FORMAT_RGBX_SINT8:
2157 case MESA_FORMAT_B10G10R10X2_UNORM:
2158 case MESA_FORMAT_R10G10B10X2_UNORM:
2159 case MESA_FORMAT_RGBX_UNORM16:
2160 case MESA_FORMAT_RGBX_SNORM16:
2161 case MESA_FORMAT_RGBX_FLOAT16:
2162 case MESA_FORMAT_RGBX_UINT16:
2163 case MESA_FORMAT_RGBX_SINT16:
2164 case MESA_FORMAT_RGBX_FLOAT32:
2165 case MESA_FORMAT_RGBX_UINT32:
2166 case MESA_FORMAT_RGBX_SINT32:
2167 return GL_FALSE;
2168
2169 case MESA_FORMAT_R10G10B10A2_UNORM:
2170 return format == GL_RGBA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2171 !swapBytes;
2172
2173 case MESA_FORMAT_G8R8_SNORM:
2174 return format == GL_RG && type == GL_BYTE && !littleEndian &&
2175 !swapBytes;
2176
2177 case MESA_FORMAT_G16R16_SNORM:
2178 return format == GL_RG && type == GL_SHORT && !littleEndian &&
2179 !swapBytes;
2180
2181 case MESA_FORMAT_B8G8R8X8_SRGB:
2182 case MESA_FORMAT_X8R8G8B8_SRGB:
2183 return GL_FALSE;
2184 }
2185
2186 return GL_FALSE;
2187 }
2188