projects / mesa.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
history | raw | HEAD
mesa: add EXT_dsa glVertexArray* functions declarations
[mesa.git] / src / mesa / main / format_utils.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2014 Intel Corporation All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include "errors.h"
26 #include "format_utils.h"
27 #include "glformats.h"
28 #include "format_pack.h"
29 #include "format_unpack.h"
30
31 const mesa_array_format RGBA32_FLOAT =
32 MESA_ARRAY_FORMAT(MESA_ARRAY_FORMAT_BASE_FORMAT_RGBA_VARIANTS,
33 4, 1, 1, 1, 4, 0, 1, 2, 3);
34
35 const mesa_array_format RGBA8_UBYTE =
36 MESA_ARRAY_FORMAT(MESA_ARRAY_FORMAT_BASE_FORMAT_RGBA_VARIANTS,
37 1, 0, 0, 1, 4, 0, 1, 2, 3);
38
39 const mesa_array_format RGBA32_UINT =
40 MESA_ARRAY_FORMAT(MESA_ARRAY_FORMAT_BASE_FORMAT_RGBA_VARIANTS,
41 4, 0, 0, 0, 4, 0, 1, 2, 3);
42
43 const mesa_array_format RGBA32_INT =
44 MESA_ARRAY_FORMAT(MESA_ARRAY_FORMAT_BASE_FORMAT_RGBA_VARIANTS,
45 4, 1, 0, 0, 4, 0, 1, 2, 3);
46
47 static void
48 invert_swizzle(uint8_t dst[4], const uint8_t src[4])
49 {
50 int i, j;
51
52 dst[0] = MESA_FORMAT_SWIZZLE_NONE;
53 dst[1] = MESA_FORMAT_SWIZZLE_NONE;
54 dst[2] = MESA_FORMAT_SWIZZLE_NONE;
55 dst[3] = MESA_FORMAT_SWIZZLE_NONE;
56
57 for (i = 0; i < 4; ++i)
58 for (j = 0; j < 4; ++j)
59 if (src[j] == i && dst[i] == MESA_FORMAT_SWIZZLE_NONE)
60 dst[i] = j;
61 }
62
63 /* Takes a src to RGBA swizzle and applies a rebase swizzle to it. This
64 * is used when we need to rebase a format to match a different
65 * base internal format.
66 *
67 * The rebase swizzle can be NULL, which means that no rebase is necessary,
68 * in which case the src to RGBA swizzle is copied to the output without
69 * changes.
70 *
71 * The resulting rebased swizzle and well as the input swizzles are
72 * all 4-element swizzles, but the rebase swizzle can be NULL if no rebase
73 * is necessary.
74 */
75 static void
76 compute_rebased_rgba_component_mapping(uint8_t *src2rgba,
77 uint8_t *rebase_swizzle,
78 uint8_t *rebased_src2rgba)
79 {
80 int i;
81
82 if (rebase_swizzle) {
83 for (i = 0; i < 4; i++) {
84 if (rebase_swizzle[i] > MESA_FORMAT_SWIZZLE_W)
85 rebased_src2rgba[i] = rebase_swizzle[i];
86 else
87 rebased_src2rgba[i] = src2rgba[rebase_swizzle[i]];
88 }
89 } else {
90 /* No rebase needed, so src2rgba is all that we need */
91 memcpy(rebased_src2rgba, src2rgba, 4 * sizeof(uint8_t));
92 }
93 }
94
95 /* Computes the final swizzle transform to apply from src to dst in a
96 * conversion that might involve a rebase swizzle.
97 *
98 * This is used to compute the swizzle transform to apply in conversions
99 * between array formats where we have a src2rgba swizzle, a rgba2dst swizzle
100 * and possibly, a rebase swizzle.
101 *
102 * The final swizzle transform to apply (src2dst) when a rebase swizzle is
103 * involved is: src -> rgba -> base -> rgba -> dst
104 */
105 static void
106 compute_src2dst_component_mapping(uint8_t *src2rgba, uint8_t *rgba2dst,
107 uint8_t *rebase_swizzle, uint8_t *src2dst)
108 {
109 int i;
110
111 if (!rebase_swizzle) {
112 for (i = 0; i < 4; i++) {
113 if (rgba2dst[i] > MESA_FORMAT_SWIZZLE_W) {
114 src2dst[i] = rgba2dst[i];
115 } else {
116 src2dst[i] = src2rgba[rgba2dst[i]];
117 }
118 }
119 } else {
120 for (i = 0; i < 4; i++) {
121 if (rgba2dst[i] > MESA_FORMAT_SWIZZLE_W) {
122 src2dst[i] = rgba2dst[i];
123 } else if (rebase_swizzle[rgba2dst[i]] > MESA_FORMAT_SWIZZLE_W) {
124 src2dst[i] = rebase_swizzle[rgba2dst[i]];
125 } else {
126 src2dst[i] = src2rgba[rebase_swizzle[rgba2dst[i]]];
127 }
128 }
129 }
130 }
131
132 /**
133 * This function is used by clients of _mesa_format_convert to obtain
134 * the rebase swizzle to use in a format conversion based on the base
135 * format involved.
136 *
137 * \param baseFormat the base internal format involved in the conversion.
138 * \param map the rebase swizzle to consider
139 *
140 * This function computes 'map' as rgba -> baseformat -> rgba and returns true
141 * if the resulting swizzle transform is not the identity transform (thus, a
142 * rebase is needed). If the function returns false then a rebase swizzle
143 * is not necessary and the value of 'map' is undefined. In this situation
144 * clients of _mesa_format_convert should pass NULL in the 'rebase_swizzle'
145 * parameter.
146 */
147 bool
148 _mesa_compute_rgba2base2rgba_component_mapping(GLenum baseFormat, uint8_t *map)
149 {
150 uint8_t rgba2base[6], base2rgba[6];
151 int i;
152
153 switch (baseFormat) {
154 case GL_ALPHA:
155 case GL_RED:
156 case GL_GREEN:
157 case GL_BLUE:
158 case GL_RG:
159 case GL_RGB:
160 case GL_BGR:
161 case GL_RGBA:
162 case GL_BGRA:
163 case GL_ABGR_EXT:
164 case GL_LUMINANCE:
165 case GL_INTENSITY:
166 case GL_LUMINANCE_ALPHA:
167 {
168 bool needRebase = false;
169 _mesa_compute_component_mapping(GL_RGBA, baseFormat, rgba2base);
170 _mesa_compute_component_mapping(baseFormat, GL_RGBA, base2rgba);
171 for (i = 0; i < 4; i++) {
172 if (base2rgba[i] > MESA_FORMAT_SWIZZLE_W) {
173 map[i] = base2rgba[i];
174 } else {
175 map[i] = rgba2base[base2rgba[i]];
176 }
177 if (map[i] != i)
178 needRebase = true;
179 }
180 return needRebase;
181 }
182 default:
183 unreachable("Unexpected base format");
184 }
185 }
186
187
188 /**
189 * Special case conversion function to swap r/b channels from the source
190 * image to the dest image.
191 */
192 static void
193 convert_ubyte_rgba_to_bgra(size_t width, size_t height,
194 const uint8_t *src, size_t src_stride,
195 uint8_t *dst, size_t dst_stride)
196 {
197 int row;
198
199 if (sizeof(void *) == 8 &&
200 src_stride % 8 == 0 &&
201 dst_stride % 8 == 0 &&
202 (GLsizeiptr) src % 8 == 0 &&
203 (GLsizeiptr) dst % 8 == 0) {
204 /* use 64-bit word to swizzle two 32-bit pixels. We need 8-byte
205 * alignment for src/dst addresses and strides.
206 */
207 for (row = 0; row < height; row++) {
208 const GLuint64 *s = (const GLuint64 *) src;
209 GLuint64 *d = (GLuint64 *) dst;
210 int i;
211 for (i = 0; i < width/2; i++) {
212 d[i] = ( (s[i] & 0xff00ff00ff00ff00) |
213 ((s[i] & 0xff000000ff) << 16) |
214 ((s[i] & 0xff000000ff0000) >> 16));
215 }
216 if (width & 1) {
217 /* handle the case of odd widths */
218 const GLuint s = ((const GLuint *) src)[width - 1];
219 GLuint *d = (GLuint *) dst + width - 1;
220 *d = ( (s & 0xff00ff00) |
221 ((s & 0xff) << 16) |
222 ((s & 0xff0000) >> 16));
223 }
224 src += src_stride;
225 dst += dst_stride;
226 }
227 } else {
228 for (row = 0; row < height; row++) {
229 const GLuint *s = (const GLuint *) src;
230 GLuint *d = (GLuint *) dst;
231 int i;
232 for (i = 0; i < width; i++) {
233 d[i] = ( (s[i] & 0xff00ff00) |
234 ((s[i] & 0xff) << 16) |
235 ((s[i] & 0xff0000) >> 16));
236 }
237 src += src_stride;
238 dst += dst_stride;
239 }
240 }
241 }
242
243
244 /**
245 * This can be used to convert between most color formats.
246 *
247 * Limitations:
248 * - This function doesn't handle GL_COLOR_INDEX or YCBCR formats.
249 * - This function doesn't handle byte-swapping or transferOps, these should
250 * be handled by the caller.
251 *
252 * \param void_dst The address where converted color data will be stored.
253 * The caller must ensure that the buffer is large enough
254 * to hold the converted pixel data.
255 * \param dst_format The destination color format. It can be a mesa_format
256 * or a mesa_array_format represented as an uint32_t.
257 * \param dst_stride The stride of the destination format in bytes.
258 * \param void_src The address of the source color data to convert.
259 * \param src_format The source color format. It can be a mesa_format
260 * or a mesa_array_format represented as an uint32_t.
261 * \param src_stride The stride of the source format in bytes.
262 * \param width The width, in pixels, of the source image to convert.
263 * \param height The height, in pixels, of the source image to convert.
264 * \param rebase_swizzle A swizzle transform to apply during the conversion,
265 * typically used to match a different internal base
266 * format involved. NULL if no rebase transform is needed
267 * (i.e. the internal base format and the base format of
268 * the dst or the src -depending on whether we are doing
269 * an upload or a download respectively- are the same).
270 */
271 void
272 _mesa_format_convert(void *void_dst, uint32_t dst_format, size_t dst_stride,
273 void *void_src, uint32_t src_format, size_t src_stride,
274 size_t width, size_t height, uint8_t *rebase_swizzle)
275 {
276 uint8_t *dst = (uint8_t *)void_dst;
277 uint8_t *src = (uint8_t *)void_src;
278 mesa_array_format src_array_format, dst_array_format;
279 bool src_format_is_mesa_array_format, dst_format_is_mesa_array_format;
280 uint8_t src2dst[4], src2rgba[4], rgba2dst[4], dst2rgba[4];
281 uint8_t rebased_src2rgba[4];
282 enum mesa_array_format_datatype src_type = 0, dst_type = 0, common_type;
283 bool normalized, dst_integer, src_integer, is_signed;
284 int src_num_channels = 0, dst_num_channels = 0;
285 uint8_t (*tmp_ubyte)[4];
286 float (*tmp_float)[4];
287 uint32_t (*tmp_uint)[4];
288 int bits;
289 size_t row;
290
291 if (_mesa_format_is_mesa_array_format(src_format)) {
292 src_format_is_mesa_array_format = true;
293 src_array_format = src_format;
294 } else {
295 assert(_mesa_is_format_color_format(src_format));
296 src_format_is_mesa_array_format = false;
297 src_array_format = _mesa_format_to_array_format(src_format);
298 }
299
300 if (_mesa_format_is_mesa_array_format(dst_format)) {
301 dst_format_is_mesa_array_format = true;
302 dst_array_format = dst_format;
303 } else {
304 assert(_mesa_is_format_color_format(dst_format));
305 dst_format_is_mesa_array_format = false;
306 dst_array_format = _mesa_format_to_array_format(dst_format);
307 }
308
309 /* First we see if we can implement the conversion with a direct pack
310 * or unpack.
311 *
312 * In this case we want to be careful when we need to apply a swizzle to
313 * match an internal base format, since in these cases a simple pack/unpack
314 * to the dst format from the src format may not match the requirements
315 * of the internal base format. For now we decide to be safe and
316 * avoid this path in these scenarios but in the future we may want to
317 * enable it for specific combinations that are known to work.
318 */
319 if (!rebase_swizzle) {
320 /* Do a direct memcpy where possible */
321 if ((dst_format_is_mesa_array_format &&
322 src_format_is_mesa_array_format &&
323 src_array_format == dst_array_format) ||
324 src_format == dst_format) {
325 int format_size = _mesa_get_format_bytes(src_format);
326 for (row = 0; row < height; row++) {
327 memcpy(dst, src, width * format_size);
328 src += src_stride;
329 dst += dst_stride;
330 }
331 return;
332 }
333
334 /* Handle the cases where we can directly unpack */
335 if (!src_format_is_mesa_array_format) {
336 if (dst_array_format == RGBA32_FLOAT) {
337 for (row = 0; row < height; ++row) {
338 _mesa_unpack_rgba_row(src_format, width,
339 src, (float (*)[4])dst);
340 src += src_stride;
341 dst += dst_stride;
342 }
343 return;
344 } else if (dst_array_format == RGBA8_UBYTE) {
345 assert(!_mesa_is_format_integer_color(src_format));
346 for (row = 0; row < height; ++row) {
347 _mesa_unpack_ubyte_rgba_row(src_format, width,
348 src, (uint8_t (*)[4])dst);
349 src += src_stride;
350 dst += dst_stride;
351 }
352 return;
353 } else if (dst_array_format == RGBA32_UINT &&
354 _mesa_is_format_unsigned(src_format)) {
355 assert(_mesa_is_format_integer_color(src_format));
356 for (row = 0; row < height; ++row) {
357 _mesa_unpack_uint_rgba_row(src_format, width,
358 src, (uint32_t (*)[4])dst);
359 src += src_stride;
360 dst += dst_stride;
361 }
362 return;
363 }
364 }
365
366 /* Handle the cases where we can directly pack */
367 if (!dst_format_is_mesa_array_format) {
368 if (src_array_format == RGBA32_FLOAT) {
369 for (row = 0; row < height; ++row) {
370 _mesa_pack_float_rgba_row(dst_format, width,
371 (const float (*)[4])src, dst);
372 src += src_stride;
373 dst += dst_stride;
374 }
375 return;
376 } else if (src_array_format == RGBA8_UBYTE) {
377 assert(!_mesa_is_format_integer_color(dst_format));
378
379 if (dst_format == MESA_FORMAT_B8G8R8A8_UNORM) {
380 convert_ubyte_rgba_to_bgra(width, height, src, src_stride,
381 dst, dst_stride);
382 }
383 else {
384 for (row = 0; row < height; ++row) {
385 _mesa_pack_ubyte_rgba_row(dst_format, width,
386 (const uint8_t (*)[4])src, dst);
387 src += src_stride;
388 dst += dst_stride;
389 }
390 }
391 return;
392 } else if (src_array_format == RGBA32_UINT &&
393 _mesa_is_format_unsigned(dst_format)) {
394 assert(_mesa_is_format_integer_color(dst_format));
395 for (row = 0; row < height; ++row) {
396 _mesa_pack_uint_rgba_row(dst_format, width,
397 (const uint32_t (*)[4])src, dst);
398 src += src_stride;
399 dst += dst_stride;
400 }
401 return;
402 }
403 }
404 }
405
406 /* Handle conversions between array formats */
407 normalized = false;
408 if (src_array_format) {
409 src_type = _mesa_array_format_get_datatype(src_array_format);
410
411 src_num_channels = _mesa_array_format_get_num_channels(src_array_format);
412
413 _mesa_array_format_get_swizzle(src_array_format, src2rgba);
414
415 normalized = _mesa_array_format_is_normalized(src_array_format);
416 }
417
418 if (dst_array_format) {
419 dst_type = _mesa_array_format_get_datatype(dst_array_format);
420
421 dst_num_channels = _mesa_array_format_get_num_channels(dst_array_format);
422
423 _mesa_array_format_get_swizzle(dst_array_format, dst2rgba);
424 invert_swizzle(rgba2dst, dst2rgba);
425
426 normalized |= _mesa_array_format_is_normalized(dst_array_format);
427 }
428
429 if (src_array_format && dst_array_format) {
430 assert(_mesa_array_format_is_normalized(src_array_format) ==
431 _mesa_array_format_is_normalized(dst_array_format));
432
433 compute_src2dst_component_mapping(src2rgba, rgba2dst, rebase_swizzle,
434 src2dst);
435
436 for (row = 0; row < height; ++row) {
437 _mesa_swizzle_and_convert(dst, dst_type, dst_num_channels,
438 src, src_type, src_num_channels,
439 src2dst, normalized, width);
440 src += src_stride;
441 dst += dst_stride;
442 }
443 return;
444 }
445
446 /* At this point, we're fresh out of fast-paths and we need to convert
447 * to float, uint32, or, if we're lucky, uint8.
448 */
449 dst_integer = false;
450 src_integer = false;
451
452 if (src_array_format) {
453 if (!_mesa_array_format_is_float(src_array_format) &&
454 !_mesa_array_format_is_normalized(src_array_format))
455 src_integer = true;
456 } else {
457 switch (_mesa_get_format_datatype(src_format)) {
458 case GL_UNSIGNED_INT:
459 case GL_INT:
460 src_integer = true;
461 break;
462 }
463 }
464
465 /* If the destination format is signed but the source is unsigned, then we
466 * don't loose any data by converting to a signed intermediate format above
467 * and beyond the precision that we loose in the conversion itself. If the
468 * destination is unsigned then, by using an unsigned intermediate format,
469 * we make the conversion function that converts from the source to the
470 * intermediate format take care of truncating at zero. The exception here
471 * is if the intermediate format is float, in which case the first
472 * conversion will leave it signed and the second conversion will truncate
473 * at zero.
474 */
475 is_signed = false;
476 if (dst_array_format) {
477 if (!_mesa_array_format_is_float(dst_array_format) &&
478 !_mesa_array_format_is_normalized(dst_array_format))
479 dst_integer = true;
480 is_signed = _mesa_array_format_is_signed(dst_array_format);
481 bits = 8 * _mesa_array_format_get_type_size(dst_array_format);
482 } else {
483 switch (_mesa_get_format_datatype(dst_format)) {
484 case GL_UNSIGNED_NORMALIZED:
485 is_signed = false;
486 break;
487 case GL_SIGNED_NORMALIZED:
488 is_signed = true;
489 break;
490 case GL_FLOAT:
491 is_signed = true;
492 break;
493 case GL_UNSIGNED_INT:
494 is_signed = false;
495 dst_integer = true;
496 break;
497 case GL_INT:
498 is_signed = true;
499 dst_integer = true;
500 break;
501 }
502 bits = _mesa_get_format_max_bits(dst_format);
503 }
504
505 assert(src_integer == dst_integer);
506
507 if (src_integer && dst_integer) {
508 tmp_uint = malloc(width * height * sizeof(*tmp_uint));
509
510 /* The [un]packing functions for unsigned datatypes treat the 32-bit
511 * integer array as signed for signed formats and as unsigned for
512 * unsigned formats. This is a bit of a problem if we ever convert from
513 * a signed to an unsigned format because the unsigned packing function
514 * doesn't know that the input is signed and will treat it as unsigned
515 * and not do the trunctation. The thing that saves us here is that all
516 * of the packed formats are unsigned, so we can just always use
517 * _mesa_swizzle_and_convert for signed formats, which is aware of the
518 * truncation problem.
519 */
520 common_type = is_signed ? MESA_ARRAY_FORMAT_TYPE_INT :
521 MESA_ARRAY_FORMAT_TYPE_UINT;
522 if (src_array_format) {
523 compute_rebased_rgba_component_mapping(src2rgba, rebase_swizzle,
524 rebased_src2rgba);
525 for (row = 0; row < height; ++row) {
526 _mesa_swizzle_and_convert(tmp_uint + row * width, common_type, 4,
527 src, src_type, src_num_channels,
528 rebased_src2rgba, normalized, width);
529 src += src_stride;
530 }
531 } else {
532 for (row = 0; row < height; ++row) {
533 _mesa_unpack_uint_rgba_row(src_format, width,
534 src, tmp_uint + row * width);
535 if (rebase_swizzle)
536 _mesa_swizzle_and_convert(tmp_uint + row * width, common_type, 4,
537 tmp_uint + row * width, common_type, 4,
538 rebase_swizzle, false, width);
539 src += src_stride;
540 }
541 }
542
543 /* At this point, we have already done the truncation if the source is
544 * signed but the destination is unsigned, so no need to force the
545 * _mesa_swizzle_and_convert path.
546 */
547 if (dst_format_is_mesa_array_format) {
548 for (row = 0; row < height; ++row) {
549 _mesa_swizzle_and_convert(dst, dst_type, dst_num_channels,
550 tmp_uint + row * width, common_type, 4,
551 rgba2dst, normalized, width);
552 dst += dst_stride;
553 }
554 } else {
555 for (row = 0; row < height; ++row) {
556 _mesa_pack_uint_rgba_row(dst_format, width,
557 (const uint32_t (*)[4])tmp_uint + row * width, dst);
558 dst += dst_stride;
559 }
560 }
561
562 free(tmp_uint);
563 } else if (is_signed || bits > 8) {
564 tmp_float = malloc(width * height * sizeof(*tmp_float));
565
566 if (src_format_is_mesa_array_format) {
567 compute_rebased_rgba_component_mapping(src2rgba, rebase_swizzle,
568 rebased_src2rgba);
569 for (row = 0; row < height; ++row) {
570 _mesa_swizzle_and_convert(tmp_float + row * width,
571 MESA_ARRAY_FORMAT_TYPE_FLOAT, 4,
572 src, src_type, src_num_channels,
573 rebased_src2rgba, normalized, width);
574 src += src_stride;
575 }
576 } else {
577 for (row = 0; row < height; ++row) {
578 _mesa_unpack_rgba_row(src_format, width,
579 src, tmp_float + row * width);
580 if (rebase_swizzle)
581 _mesa_swizzle_and_convert(tmp_float + row * width,
582 MESA_ARRAY_FORMAT_TYPE_FLOAT, 4,
583 tmp_float + row * width,
584 MESA_ARRAY_FORMAT_TYPE_FLOAT, 4,
585 rebase_swizzle, normalized, width);
586 src += src_stride;
587 }
588 }
589
590 if (dst_format_is_mesa_array_format) {
591 for (row = 0; row < height; ++row) {
592 _mesa_swizzle_and_convert(dst, dst_type, dst_num_channels,
593 tmp_float + row * width,
594 MESA_ARRAY_FORMAT_TYPE_FLOAT, 4,
595 rgba2dst, normalized, width);
596 dst += dst_stride;
597 }
598 } else {
599 for (row = 0; row < height; ++row) {
600 _mesa_pack_float_rgba_row(dst_format, width,
601 (const float (*)[4])tmp_float + row * width, dst);
602 dst += dst_stride;
603 }
604 }
605
606 free(tmp_float);
607 } else {
608 tmp_ubyte = malloc(width * height * sizeof(*tmp_ubyte));
609
610 if (src_format_is_mesa_array_format) {
611 compute_rebased_rgba_component_mapping(src2rgba, rebase_swizzle,
612 rebased_src2rgba);
613 for (row = 0; row < height; ++row) {
614 _mesa_swizzle_and_convert(tmp_ubyte + row * width,
615 MESA_ARRAY_FORMAT_TYPE_UBYTE, 4,
616 src, src_type, src_num_channels,
617 rebased_src2rgba, normalized, width);
618 src += src_stride;
619 }
620 } else {
621 for (row = 0; row < height; ++row) {
622 _mesa_unpack_ubyte_rgba_row(src_format, width,
623 src, tmp_ubyte + row * width);
624 if (rebase_swizzle)
625 _mesa_swizzle_and_convert(tmp_ubyte + row * width,
626 MESA_ARRAY_FORMAT_TYPE_UBYTE, 4,
627 tmp_ubyte + row * width,
628 MESA_ARRAY_FORMAT_TYPE_UBYTE, 4,
629 rebase_swizzle, normalized, width);
630 src += src_stride;
631 }
632 }
633
634 if (dst_format_is_mesa_array_format) {
635 for (row = 0; row < height; ++row) {
636 _mesa_swizzle_and_convert(dst, dst_type, dst_num_channels,
637 tmp_ubyte + row * width,
638 MESA_ARRAY_FORMAT_TYPE_UBYTE, 4,
639 rgba2dst, normalized, width);
640 dst += dst_stride;
641 }
642 } else {
643 for (row = 0; row < height; ++row) {
644 _mesa_pack_ubyte_rgba_row(dst_format, width,
645 (const uint8_t (*)[4])tmp_ubyte + row * width, dst);
646 dst += dst_stride;
647 }
648 }
649
650 free(tmp_ubyte);
651 }
652 }
653
654 static const uint8_t map_identity[7] = { 0, 1, 2, 3, 4, 5, 6 };
655 static const uint8_t map_3210[7] = { 3, 2, 1, 0, 4, 5, 6 };
656 static const uint8_t map_1032[7] = { 1, 0, 3, 2, 4, 5, 6 };
657
658 /**
659 * Describes a format as an array format, if possible
660 *
661 * A helper function for figuring out if a (possibly packed) format is
662 * actually an array format and, if so, what the array parameters are.
663 *
664 * \param[in] format the mesa format
665 * \param[out] type the GL type of the array (GL_BYTE, etc.)
666 * \param[out] num_components the number of components in the array
667 * \param[out] swizzle a swizzle describing how to get from the
668 * given format to RGBA
669 * \param[out] normalized for integer formats, this represents whether
670 * the format is a normalized integer or a
671 * regular integer
672 * \return true if this format is an array format, false otherwise
673 */
674 bool
675 _mesa_format_to_array(mesa_format format, GLenum *type, int *num_components,
676 uint8_t swizzle[4], bool *normalized)
677 {
678 int i;
679 GLuint format_components;
680 uint8_t packed_swizzle[4];
681 const uint8_t *endian;
682
683 if (_mesa_is_format_compressed(format))
684 return false;
685
686 *normalized = !_mesa_is_format_integer(format);
687
688 _mesa_uncompressed_format_to_type_and_comps(format, type, &format_components);
689
690 switch (_mesa_get_format_layout(format)) {
691 case MESA_FORMAT_LAYOUT_ARRAY:
692 *num_components = format_components;
693 _mesa_get_format_swizzle(format, swizzle);
694 return true;
695 case MESA_FORMAT_LAYOUT_PACKED:
696 switch (*type) {
697 case GL_UNSIGNED_BYTE:
698 case GL_BYTE:
699 if (_mesa_get_format_max_bits(format) != 8)
700 return false;
701 *num_components = _mesa_get_format_bytes(format);
702 switch (*num_components) {
703 case 1:
704 endian = map_identity;
705 break;
706 case 2:
707 endian = _mesa_little_endian() ? map_identity : map_1032;
708 break;
709 case 4:
710 endian = _mesa_little_endian() ? map_identity : map_3210;
711 break;
712 default:
713 endian = map_identity;
714 assert(!"Invalid number of components");
715 }
716 break;
717 case GL_UNSIGNED_SHORT:
718 case GL_SHORT:
719 case GL_HALF_FLOAT:
720 if (_mesa_get_format_max_bits(format) != 16)
721 return false;
722 *num_components = _mesa_get_format_bytes(format) / 2;
723 switch (*num_components) {
724 case 1:
725 endian = map_identity;
726 break;
727 case 2:
728 endian = _mesa_little_endian() ? map_identity : map_1032;
729 break;
730 default:
731 endian = map_identity;
732 assert(!"Invalid number of components");
733 }
734 break;
735 case GL_UNSIGNED_INT:
736 case GL_INT:
737 case GL_FLOAT:
738 /* This isn't packed. At least not really. */
739 assert(format_components == 1);
740 if (_mesa_get_format_max_bits(format) != 32)
741 return false;
742 *num_components = format_components;
743 endian = map_identity;
744 break;
745 default:
746 return false;
747 }
748
749 _mesa_get_format_swizzle(format, packed_swizzle);
750
751 for (i = 0; i < 4; ++i)
752 swizzle[i] = endian[packed_swizzle[i]];
753
754 return true;
755 case MESA_FORMAT_LAYOUT_OTHER:
756 default:
757 return false;
758 }
759 }
760
761 /**
762 * Attempts to perform the given swizzle-and-convert operation with memcpy
763 *
764 * This function determines if the given swizzle-and-convert operation can
765 * be done with a simple memcpy and, if so, does the memcpy. If not, it
766 * returns false and we fall back to the standard version below.
767 *
768 * The arguments are exactly the same as for _mesa_swizzle_and_convert
769 *
770 * \return true if it successfully performed the swizzle-and-convert
771 * operation with memcpy, false otherwise
772 */
773 static bool
774 swizzle_convert_try_memcpy(void *dst,
775 enum mesa_array_format_datatype dst_type,
776 int num_dst_channels,
777 const void *src,
778 enum mesa_array_format_datatype src_type,
779 int num_src_channels,
780 const uint8_t swizzle[4], bool normalized, int count)
781 {
782 int i;
783
784 if (src_type != dst_type)
785 return false;
786 if (num_src_channels != num_dst_channels)
787 return false;
788
789 for (i = 0; i < num_dst_channels; ++i)
790 if (swizzle[i] != i && swizzle[i] != MESA_FORMAT_SWIZZLE_NONE)
791 return false;
792
793 memcpy(dst, src, count * num_src_channels *
794 _mesa_array_format_datatype_get_size(src_type));
795
796 return true;
797 }
798
799 /**
800 * Represents a single instance of the standard swizzle-and-convert loop
801 *
802 * Any swizzle-and-convert operation simply loops through the pixels and
803 * performs the transformation operation one pixel at a time. This macro
804 * embodies one instance of the conversion loop. This way we can do all
805 * control flow outside of the loop and allow the compiler to unroll
806 * everything inside the loop.
807 *
808 * Note: This loop is carefully crafted for performance. Be careful when
809 * changing it and run some benchmarks to ensure no performance regressions
810 * if you do.
811 *
812 * \param DST_TYPE the C datatype of the destination
813 * \param DST_CHANS the number of destination channels
814 * \param SRC_TYPE the C datatype of the source
815 * \param SRC_CHANS the number of source channels
816 * \param CONV an expression for converting from the source data,
817 * storred in the variable "src", to the destination
818 * format
819 */
820 #define SWIZZLE_CONVERT_LOOP(DST_TYPE, DST_CHANS, SRC_TYPE, SRC_CHANS, CONV) \
821 do { \
822 int s, j; \
823 for (s = 0; s < count; ++s) { \
824 for (j = 0; j < SRC_CHANS; ++j) { \
825 SRC_TYPE src = typed_src[j]; \
826 tmp[j] = CONV; \
827 } \
828 \
829 typed_dst[0] = tmp[swizzle_x]; \
830 if (DST_CHANS > 1) { \
831 typed_dst[1] = tmp[swizzle_y]; \
832 if (DST_CHANS > 2) { \
833 typed_dst[2] = tmp[swizzle_z]; \
834 if (DST_CHANS > 3) { \
835 typed_dst[3] = tmp[swizzle_w]; \
836 } \
837 } \
838 } \
839 typed_src += SRC_CHANS; \
840 typed_dst += DST_CHANS; \
841 } \
842 } while (0)
843
844 /**
845 * Represents a single swizzle-and-convert operation
846 *
847 * This macro represents everything done in a single swizzle-and-convert
848 * operation. The actual work is done by the SWIZZLE_CONVERT_LOOP macro.
849 * This macro acts as a wrapper that uses a nested switch to ensure that
850 * all looping parameters get unrolled.
851 *
852 * This macro makes assumptions about variables etc. in the calling
853 * function. Changes to _mesa_swizzle_and_convert may require changes to
854 * this macro.
855 *
856 * \param DST_TYPE the C datatype of the destination
857 * \param SRC_TYPE the C datatype of the source
858 * \param CONV an expression for converting from the source data,
859 * storred in the variable "src", to the destination
860 * format
861 */
862 #define SWIZZLE_CONVERT(DST_TYPE, SRC_TYPE, CONV) \
863 do { \
864 const uint8_t swizzle_x = swizzle[0]; \
865 const uint8_t swizzle_y = swizzle[1]; \
866 const uint8_t swizzle_z = swizzle[2]; \
867 const uint8_t swizzle_w = swizzle[3]; \
868 const SRC_TYPE *typed_src = void_src; \
869 DST_TYPE *typed_dst = void_dst; \
870 DST_TYPE tmp[7]; \
871 tmp[4] = 0; \
872 tmp[5] = one; \
873 switch (num_dst_channels) { \
874 case 1: \
875 switch (num_src_channels) { \
876 case 1: \
877 SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 1, CONV); \
878 break; \
879 case 2: \
880 SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 2, CONV); \
881 break; \
882 case 3: \
883 SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 3, CONV); \
884 break; \
885 case 4: \
886 SWIZZLE_CONVERT_LOOP(DST_TYPE, 1, SRC_TYPE, 4, CONV); \
887 break; \
888 } \
889 break; \
890 case 2: \
891 switch (num_src_channels) { \
892 case 1: \
893 SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 1, CONV); \
894 break; \
895 case 2: \
896 SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 2, CONV); \
897 break; \
898 case 3: \
899 SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 3, CONV); \
900 break; \
901 case 4: \
902 SWIZZLE_CONVERT_LOOP(DST_TYPE, 2, SRC_TYPE, 4, CONV); \
903 break; \
904 } \
905 break; \
906 case 3: \
907 switch (num_src_channels) { \
908 case 1: \
909 SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 1, CONV); \
910 break; \
911 case 2: \
912 SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 2, CONV); \
913 break; \
914 case 3: \
915 SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 3, CONV); \
916 break; \
917 case 4: \
918 SWIZZLE_CONVERT_LOOP(DST_TYPE, 3, SRC_TYPE, 4, CONV); \
919 break; \
920 } \
921 break; \
922 case 4: \
923 switch (num_src_channels) { \
924 case 1: \
925 SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 1, CONV); \
926 break; \
927 case 2: \
928 SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 2, CONV); \
929 break; \
930 case 3: \
931 SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 3, CONV); \
932 break; \
933 case 4: \
934 SWIZZLE_CONVERT_LOOP(DST_TYPE, 4, SRC_TYPE, 4, CONV); \
935 break; \
936 } \
937 break; \
938 } \
939 } while (0)
940
941
942 static void
943 convert_float(void *void_dst, int num_dst_channels,
944 const void *void_src, GLenum src_type, int num_src_channels,
945 const uint8_t swizzle[4], bool normalized, int count)
946 {
947 const float one = 1.0f;
948
949 switch (src_type) {
950 case MESA_ARRAY_FORMAT_TYPE_FLOAT:
951 SWIZZLE_CONVERT(float, float, src);
952 break;
953 case MESA_ARRAY_FORMAT_TYPE_HALF:
954 SWIZZLE_CONVERT(float, uint16_t, _mesa_half_to_float(src));
955 break;
956 case MESA_ARRAY_FORMAT_TYPE_UBYTE:
957 if (normalized) {
958 SWIZZLE_CONVERT(float, uint8_t, _mesa_unorm_to_float(src, 8));
959 } else {
960 SWIZZLE_CONVERT(float, uint8_t, src);
961 }
962 break;
963 case MESA_ARRAY_FORMAT_TYPE_BYTE:
964 if (normalized) {
965 SWIZZLE_CONVERT(float, int8_t, _mesa_snorm_to_float(src, 8));
966 } else {
967 SWIZZLE_CONVERT(float, int8_t, src);
968 }
969 break;
970 case MESA_ARRAY_FORMAT_TYPE_USHORT:
971 if (normalized) {
972 SWIZZLE_CONVERT(float, uint16_t, _mesa_unorm_to_float(src, 16));
973 } else {
974 SWIZZLE_CONVERT(float, uint16_t, src);
975 }
976 break;
977 case MESA_ARRAY_FORMAT_TYPE_SHORT:
978 if (normalized) {
979 SWIZZLE_CONVERT(float, int16_t, _mesa_snorm_to_float(src, 16));
980 } else {
981 SWIZZLE_CONVERT(float, int16_t, src);
982 }
983 break;
984 case MESA_ARRAY_FORMAT_TYPE_UINT:
985 if (normalized) {
986 SWIZZLE_CONVERT(float, uint32_t, _mesa_unorm_to_float(src, 32));
987 } else {
988 SWIZZLE_CONVERT(float, uint32_t, src);
989 }
990 break;
991 case MESA_ARRAY_FORMAT_TYPE_INT:
992 if (normalized) {
993 SWIZZLE_CONVERT(float, int32_t, _mesa_snorm_to_float(src, 32));
994 } else {
995 SWIZZLE_CONVERT(float, int32_t, src);
996 }
997 break;
998 default:
999 assert(!"Invalid channel type combination");
1000 }
1001 }
1002
1003
1004 static void
1005 convert_half_float(void *void_dst, int num_dst_channels,
1006 const void *void_src, GLenum src_type, int num_src_channels,
1007 const uint8_t swizzle[4], bool normalized, int count)
1008 {
1009 const uint16_t one = _mesa_float_to_half(1.0f);
1010
1011 switch (src_type) {
1012 case MESA_ARRAY_FORMAT_TYPE_FLOAT:
1013 SWIZZLE_CONVERT(uint16_t, float, _mesa_float_to_half(src));
1014 break;
1015 case MESA_ARRAY_FORMAT_TYPE_HALF:
1016 SWIZZLE_CONVERT(uint16_t, uint16_t, src);
1017 break;
1018 case MESA_ARRAY_FORMAT_TYPE_UBYTE:
1019 if (normalized) {
1020 SWIZZLE_CONVERT(uint16_t, uint8_t, _mesa_unorm_to_half(src, 8));
1021 } else {
1022 SWIZZLE_CONVERT(uint16_t, uint8_t, _mesa_float_to_half(src));
1023 }
1024 break;
1025 case MESA_ARRAY_FORMAT_TYPE_BYTE:
1026 if (normalized) {
1027 SWIZZLE_CONVERT(uint16_t, int8_t, _mesa_snorm_to_half(src, 8));
1028 } else {
1029 SWIZZLE_CONVERT(uint16_t, int8_t, _mesa_float_to_half(src));
1030 }
1031 break;
1032 case MESA_ARRAY_FORMAT_TYPE_USHORT:
1033 if (normalized) {
1034 SWIZZLE_CONVERT(uint16_t, uint16_t, _mesa_unorm_to_half(src, 16));
1035 } else {
1036 SWIZZLE_CONVERT(uint16_t, uint16_t, _mesa_float_to_half(src));
1037 }
1038 break;
1039 case MESA_ARRAY_FORMAT_TYPE_SHORT:
1040 if (normalized) {
1041 SWIZZLE_CONVERT(uint16_t, int16_t, _mesa_snorm_to_half(src, 16));
1042 } else {
1043 SWIZZLE_CONVERT(uint16_t, int16_t, _mesa_float_to_half(src));
1044 }
1045 break;
1046 case MESA_ARRAY_FORMAT_TYPE_UINT:
1047 if (normalized) {
1048 SWIZZLE_CONVERT(uint16_t, uint32_t, _mesa_unorm_to_half(src, 32));
1049 } else {
1050 SWIZZLE_CONVERT(uint16_t, uint32_t, _mesa_float_to_half(src));
1051 }
1052 break;
1053 case MESA_ARRAY_FORMAT_TYPE_INT:
1054 if (normalized) {
1055 SWIZZLE_CONVERT(uint16_t, int32_t, _mesa_snorm_to_half(src, 32));
1056 } else {
1057 SWIZZLE_CONVERT(uint16_t, int32_t, _mesa_float_to_half(src));
1058 }
1059 break;
1060 default:
1061 assert(!"Invalid channel type combination");
1062 }
1063 }
1064
1065 static void
1066 convert_ubyte(void *void_dst, int num_dst_channels,
1067 const void *void_src, GLenum src_type, int num_src_channels,
1068 const uint8_t swizzle[4], bool normalized, int count)
1069 {
1070 const uint8_t one = normalized ? UINT8_MAX : 1;
1071
1072 switch (src_type) {
1073 case MESA_ARRAY_FORMAT_TYPE_FLOAT:
1074 if (normalized) {
1075 SWIZZLE_CONVERT(uint8_t, float, _mesa_float_to_unorm(src, 8));
1076 } else {
1077 SWIZZLE_CONVERT(uint8_t, float, _mesa_float_to_unsigned(src, 8));
1078 }
1079 break;
1080 case MESA_ARRAY_FORMAT_TYPE_HALF:
1081 if (normalized) {
1082 SWIZZLE_CONVERT(uint8_t, uint16_t, _mesa_half_to_unorm(src, 8));
1083 } else {
1084 SWIZZLE_CONVERT(uint8_t, uint16_t, _mesa_half_to_unsigned(src, 8));
1085 }
1086 break;
1087 case MESA_ARRAY_FORMAT_TYPE_UBYTE:
1088 SWIZZLE_CONVERT(uint8_t, uint8_t, src);
1089 break;
1090 case MESA_ARRAY_FORMAT_TYPE_BYTE:
1091 if (normalized) {
1092 SWIZZLE_CONVERT(uint8_t, int8_t, _mesa_snorm_to_unorm(src, 8, 8));
1093 } else {
1094 SWIZZLE_CONVERT(uint8_t, int8_t, _mesa_signed_to_unsigned(src, 8));
1095 }
1096 break;
1097 case MESA_ARRAY_FORMAT_TYPE_USHORT:
1098 if (normalized) {
1099 SWIZZLE_CONVERT(uint8_t, uint16_t, _mesa_unorm_to_unorm(src, 16, 8));
1100 } else {
1101 SWIZZLE_CONVERT(uint8_t, uint16_t, _mesa_unsigned_to_unsigned(src, 8));
1102 }
1103 break;
1104 case MESA_ARRAY_FORMAT_TYPE_SHORT:
1105 if (normalized) {
1106 SWIZZLE_CONVERT(uint8_t, int16_t, _mesa_snorm_to_unorm(src, 16, 8));
1107 } else {
1108 SWIZZLE_CONVERT(uint8_t, int16_t, _mesa_signed_to_unsigned(src, 8));
1109 }
1110 break;
1111 case MESA_ARRAY_FORMAT_TYPE_UINT:
1112 if (normalized) {
1113 SWIZZLE_CONVERT(uint8_t, uint32_t, _mesa_unorm_to_unorm(src, 32, 8));
1114 } else {
1115 SWIZZLE_CONVERT(uint8_t, uint32_t, _mesa_unsigned_to_unsigned(src, 8));
1116 }
1117 break;
1118 case MESA_ARRAY_FORMAT_TYPE_INT:
1119 if (normalized) {
1120 SWIZZLE_CONVERT(uint8_t, int32_t, _mesa_snorm_to_unorm(src, 32, 8));
1121 } else {
1122 SWIZZLE_CONVERT(uint8_t, int32_t, _mesa_signed_to_unsigned(src, 8));
1123 }
1124 break;
1125 default:
1126 assert(!"Invalid channel type combination");
1127 }
1128 }
1129
1130
1131 static void
1132 convert_byte(void *void_dst, int num_dst_channels,
1133 const void *void_src, GLenum src_type, int num_src_channels,
1134 const uint8_t swizzle[4], bool normalized, int count)
1135 {
1136 const int8_t one = normalized ? INT8_MAX : 1;
1137
1138 switch (src_type) {
1139 case MESA_ARRAY_FORMAT_TYPE_FLOAT:
1140 if (normalized) {
1141 SWIZZLE_CONVERT(uint8_t, float, _mesa_float_to_snorm(src, 8));
1142 } else {
1143 SWIZZLE_CONVERT(uint8_t, float, _mesa_float_to_signed(src, 8));
1144 }
1145 break;
1146 case MESA_ARRAY_FORMAT_TYPE_HALF:
1147 if (normalized) {
1148 SWIZZLE_CONVERT(uint8_t, uint16_t, _mesa_half_to_snorm(src, 8));
1149 } else {
1150 SWIZZLE_CONVERT(uint8_t, uint16_t, _mesa_half_to_signed(src, 8));
1151 }
1152 break;
1153 case MESA_ARRAY_FORMAT_TYPE_UBYTE:
1154 if (normalized) {
1155 SWIZZLE_CONVERT(int8_t, uint8_t, _mesa_unorm_to_snorm(src, 8, 8));
1156 } else {
1157 SWIZZLE_CONVERT(int8_t, uint8_t, _mesa_unsigned_to_signed(src, 8));
1158 }
1159 break;
1160 case MESA_ARRAY_FORMAT_TYPE_BYTE:
1161 SWIZZLE_CONVERT(int8_t, int8_t, src);
1162 break;
1163 case MESA_ARRAY_FORMAT_TYPE_USHORT:
1164 if (normalized) {
1165 SWIZZLE_CONVERT(int8_t, uint16_t, _mesa_unorm_to_snorm(src, 16, 8));
1166 } else {
1167 SWIZZLE_CONVERT(int8_t, uint16_t, _mesa_unsigned_to_signed(src, 8));
1168 }
1169 break;
1170 case MESA_ARRAY_FORMAT_TYPE_SHORT:
1171 if (normalized) {
1172 SWIZZLE_CONVERT(int8_t, int16_t, _mesa_snorm_to_snorm(src, 16, 8));
1173 } else {
1174 SWIZZLE_CONVERT(int8_t, int16_t, _mesa_signed_to_signed(src, 8));
1175 }
1176 break;
1177 case MESA_ARRAY_FORMAT_TYPE_UINT:
1178 if (normalized) {
1179 SWIZZLE_CONVERT(int8_t, uint32_t, _mesa_unorm_to_snorm(src, 32, 8));
1180 } else {
1181 SWIZZLE_CONVERT(int8_t, uint32_t, _mesa_unsigned_to_signed(src, 8));
1182 }
1183 break;
1184 case MESA_ARRAY_FORMAT_TYPE_INT:
1185 if (normalized) {
1186 SWIZZLE_CONVERT(int8_t, int32_t, _mesa_snorm_to_snorm(src, 32, 8));
1187 } else {
1188 SWIZZLE_CONVERT(int8_t, int32_t, _mesa_signed_to_signed(src, 8));
1189 }
1190 break;
1191 default:
1192 assert(!"Invalid channel type combination");
1193 }
1194 }
1195
1196
1197 static void
1198 convert_ushort(void *void_dst, int num_dst_channels,
1199 const void *void_src, GLenum src_type, int num_src_channels,
1200 const uint8_t swizzle[4], bool normalized, int count)
1201 {
1202 const uint16_t one = normalized ? UINT16_MAX : 1;
1203
1204 switch (src_type) {
1205 case MESA_ARRAY_FORMAT_TYPE_FLOAT:
1206 if (normalized) {
1207 SWIZZLE_CONVERT(uint16_t, float, _mesa_float_to_unorm(src, 16));
1208 } else {
1209 SWIZZLE_CONVERT(uint16_t, float, _mesa_float_to_unsigned(src, 16));
1210 }
1211 break;
1212 case MESA_ARRAY_FORMAT_TYPE_HALF:
1213 if (normalized) {
1214 SWIZZLE_CONVERT(uint16_t, uint16_t, _mesa_half_to_unorm(src, 16));
1215 } else {
1216 SWIZZLE_CONVERT(uint16_t, uint16_t, _mesa_half_to_unsigned(src, 16));
1217 }
1218 break;
1219 case MESA_ARRAY_FORMAT_TYPE_UBYTE:
1220 if (normalized) {
1221 SWIZZLE_CONVERT(uint16_t, uint8_t, _mesa_unorm_to_unorm(src, 8, 16));
1222 } else {
1223 SWIZZLE_CONVERT(uint16_t, uint8_t, src);
1224 }
1225 break;
1226 case MESA_ARRAY_FORMAT_TYPE_BYTE:
1227 if (normalized) {
1228 SWIZZLE_CONVERT(uint16_t, int8_t, _mesa_snorm_to_unorm(src, 8, 16));
1229 } else {
1230 SWIZZLE_CONVERT(uint16_t, int8_t, _mesa_signed_to_unsigned(src, 16));
1231 }
1232 break;
1233 case MESA_ARRAY_FORMAT_TYPE_USHORT:
1234 SWIZZLE_CONVERT(uint16_t, uint16_t, src);
1235 break;
1236 case MESA_ARRAY_FORMAT_TYPE_SHORT:
1237 if (normalized) {
1238 SWIZZLE_CONVERT(uint16_t, int16_t, _mesa_snorm_to_unorm(src, 16, 16));
1239 } else {
1240 SWIZZLE_CONVERT(uint16_t, int16_t, _mesa_signed_to_unsigned(src, 16));
1241 }
1242 break;
1243 case MESA_ARRAY_FORMAT_TYPE_UINT:
1244 if (normalized) {
1245 SWIZZLE_CONVERT(uint16_t, uint32_t, _mesa_unorm_to_unorm(src, 32, 16));
1246 } else {
1247 SWIZZLE_CONVERT(uint16_t, uint32_t, _mesa_unsigned_to_unsigned(src, 16));
1248 }
1249 break;
1250 case MESA_ARRAY_FORMAT_TYPE_INT:
1251 if (normalized) {
1252 SWIZZLE_CONVERT(uint16_t, int32_t, _mesa_snorm_to_unorm(src, 32, 16));
1253 } else {
1254 SWIZZLE_CONVERT(uint16_t, int32_t, _mesa_signed_to_unsigned(src, 16));
1255 }
1256 break;
1257 default:
1258 assert(!"Invalid channel type combination");
1259 }
1260 }
1261
1262
1263 static void
1264 convert_short(void *void_dst, int num_dst_channels,
1265 const void *void_src, GLenum src_type, int num_src_channels,
1266 const uint8_t swizzle[4], bool normalized, int count)
1267 {
1268 const int16_t one = normalized ? INT16_MAX : 1;
1269
1270 switch (src_type) {
1271 case MESA_ARRAY_FORMAT_TYPE_FLOAT:
1272 if (normalized) {
1273 SWIZZLE_CONVERT(uint16_t, float, _mesa_float_to_snorm(src, 16));
1274 } else {
1275 SWIZZLE_CONVERT(uint16_t, float, _mesa_float_to_signed(src, 16));
1276 }
1277 break;
1278 case MESA_ARRAY_FORMAT_TYPE_HALF:
1279 if (normalized) {
1280 SWIZZLE_CONVERT(uint16_t, uint16_t, _mesa_half_to_snorm(src, 16));
1281 } else {
1282 SWIZZLE_CONVERT(uint16_t, uint16_t, _mesa_half_to_signed(src, 16));
1283 }
1284 break;
1285 case MESA_ARRAY_FORMAT_TYPE_UBYTE:
1286 if (normalized) {
1287 SWIZZLE_CONVERT(int16_t, uint8_t, _mesa_unorm_to_snorm(src, 8, 16));
1288 } else {
1289 SWIZZLE_CONVERT(int16_t, uint8_t, src);
1290 }
1291 break;
1292 case MESA_ARRAY_FORMAT_TYPE_BYTE:
1293 if (normalized) {
1294 SWIZZLE_CONVERT(int16_t, int8_t, _mesa_snorm_to_snorm(src, 8, 16));
1295 } else {
1296 SWIZZLE_CONVERT(int16_t, int8_t, src);
1297 }
1298 break;
1299 case MESA_ARRAY_FORMAT_TYPE_USHORT:
1300 if (normalized) {
1301 SWIZZLE_CONVERT(int16_t, uint16_t, _mesa_unorm_to_snorm(src, 16, 16));
1302 } else {
1303 SWIZZLE_CONVERT(int16_t, uint16_t, _mesa_unsigned_to_signed(src, 16));
1304 }
1305 break;
1306 case MESA_ARRAY_FORMAT_TYPE_SHORT:
1307 SWIZZLE_CONVERT(int16_t, int16_t, src);
1308 break;
1309 case MESA_ARRAY_FORMAT_TYPE_UINT:
1310 if (normalized) {
1311 SWIZZLE_CONVERT(int16_t, uint32_t, _mesa_unorm_to_snorm(src, 32, 16));
1312 } else {
1313 SWIZZLE_CONVERT(int16_t, uint32_t, _mesa_unsigned_to_signed(src, 16));
1314 }
1315 break;
1316 case MESA_ARRAY_FORMAT_TYPE_INT:
1317 if (normalized) {
1318 SWIZZLE_CONVERT(int16_t, int32_t, _mesa_snorm_to_snorm(src, 32, 16));
1319 } else {
1320 SWIZZLE_CONVERT(int16_t, int32_t, _mesa_signed_to_signed(src, 16));
1321 }
1322 break;
1323 default:
1324 assert(!"Invalid channel type combination");
1325 }
1326 }
1327
1328 static void
1329 convert_uint(void *void_dst, int num_dst_channels,
1330 const void *void_src, GLenum src_type, int num_src_channels,
1331 const uint8_t swizzle[4], bool normalized, int count)
1332 {
1333 const uint32_t one = normalized ? UINT32_MAX : 1;
1334
1335 switch (src_type) {
1336 case MESA_ARRAY_FORMAT_TYPE_FLOAT:
1337 if (normalized) {
1338 SWIZZLE_CONVERT(uint32_t, float, _mesa_float_to_unorm(src, 32));
1339 } else {
1340 SWIZZLE_CONVERT(uint32_t, float, _mesa_float_to_unsigned(src, 32));
1341 }
1342 break;
1343 case MESA_ARRAY_FORMAT_TYPE_HALF:
1344 if (normalized) {
1345 SWIZZLE_CONVERT(uint32_t, uint16_t, _mesa_half_to_unorm(src, 32));
1346 } else {
1347 SWIZZLE_CONVERT(uint32_t, uint16_t, _mesa_half_to_unsigned(src, 32));
1348 }
1349 break;
1350 case MESA_ARRAY_FORMAT_TYPE_UBYTE:
1351 if (normalized) {
1352 SWIZZLE_CONVERT(uint32_t, uint8_t, _mesa_unorm_to_unorm(src, 8, 32));
1353 } else {
1354 SWIZZLE_CONVERT(uint32_t, uint8_t, src);
1355 }
1356 break;
1357 case MESA_ARRAY_FORMAT_TYPE_BYTE:
1358 if (normalized) {
1359 SWIZZLE_CONVERT(uint32_t, int8_t, _mesa_snorm_to_unorm(src, 8, 32));
1360 } else {
1361 SWIZZLE_CONVERT(uint32_t, int8_t, _mesa_signed_to_unsigned(src, 32));
1362 }
1363 break;
1364 case MESA_ARRAY_FORMAT_TYPE_USHORT:
1365 if (normalized) {
1366 SWIZZLE_CONVERT(uint32_t, uint16_t, _mesa_unorm_to_unorm(src, 16, 32));
1367 } else {
1368 SWIZZLE_CONVERT(uint32_t, uint16_t, src);
1369 }
1370 break;
1371 case MESA_ARRAY_FORMAT_TYPE_SHORT:
1372 if (normalized) {
1373 SWIZZLE_CONVERT(uint32_t, int16_t, _mesa_snorm_to_unorm(src, 16, 32));
1374 } else {
1375 SWIZZLE_CONVERT(uint32_t, int16_t, _mesa_signed_to_unsigned(src, 32));
1376 }
1377 break;
1378 case MESA_ARRAY_FORMAT_TYPE_UINT:
1379 SWIZZLE_CONVERT(uint32_t, uint32_t, src);
1380 break;
1381 case MESA_ARRAY_FORMAT_TYPE_INT:
1382 if (normalized) {
1383 SWIZZLE_CONVERT(uint32_t, int32_t, _mesa_snorm_to_unorm(src, 32, 32));
1384 } else {
1385 SWIZZLE_CONVERT(uint32_t, int32_t, _mesa_signed_to_unsigned(src, 32));
1386 }
1387 break;
1388 default:
1389 assert(!"Invalid channel type combination");
1390 }
1391 }
1392
1393
1394 static void
1395 convert_int(void *void_dst, int num_dst_channels,
1396 const void *void_src, GLenum src_type, int num_src_channels,
1397 const uint8_t swizzle[4], bool normalized, int count)
1398 {
1399 const int32_t one = normalized ? INT32_MAX : 1;
1400
1401 switch (src_type) {
1402 case MESA_ARRAY_FORMAT_TYPE_FLOAT:
1403 if (normalized) {
1404 SWIZZLE_CONVERT(uint32_t, float, _mesa_float_to_snorm(src, 32));
1405 } else {
1406 SWIZZLE_CONVERT(uint32_t, float, _mesa_float_to_signed(src, 32));
1407 }
1408 break;
1409 case MESA_ARRAY_FORMAT_TYPE_HALF:
1410 if (normalized) {
1411 SWIZZLE_CONVERT(uint32_t, uint16_t, _mesa_half_to_snorm(src, 32));
1412 } else {
1413 SWIZZLE_CONVERT(uint32_t, uint16_t, _mesa_half_to_signed(src, 32));
1414 }
1415 break;
1416 case MESA_ARRAY_FORMAT_TYPE_UBYTE:
1417 if (normalized) {
1418 SWIZZLE_CONVERT(int32_t, uint8_t, _mesa_unorm_to_snorm(src, 8, 32));
1419 } else {
1420 SWIZZLE_CONVERT(int32_t, uint8_t, src);
1421 }
1422 break;
1423 case MESA_ARRAY_FORMAT_TYPE_BYTE:
1424 if (normalized) {
1425 SWIZZLE_CONVERT(int32_t, int8_t, _mesa_snorm_to_snorm(src, 8, 32));
1426 } else {
1427 SWIZZLE_CONVERT(int32_t, int8_t, src);
1428 }
1429 break;
1430 case MESA_ARRAY_FORMAT_TYPE_USHORT:
1431 if (normalized) {
1432 SWIZZLE_CONVERT(int32_t, uint16_t, _mesa_unorm_to_snorm(src, 16, 32));
1433 } else {
1434 SWIZZLE_CONVERT(int32_t, uint16_t, src);
1435 }
1436 break;
1437 case MESA_ARRAY_FORMAT_TYPE_SHORT:
1438 if (normalized) {
1439 SWIZZLE_CONVERT(int32_t, int16_t, _mesa_snorm_to_snorm(src, 16, 32));
1440 } else {
1441 SWIZZLE_CONVERT(int32_t, int16_t, src);
1442 }
1443 break;
1444 case MESA_ARRAY_FORMAT_TYPE_UINT:
1445 if (normalized) {
1446 SWIZZLE_CONVERT(int32_t, uint32_t, _mesa_unorm_to_snorm(src, 32, 32));
1447 } else {
1448 SWIZZLE_CONVERT(int32_t, uint32_t, _mesa_unsigned_to_signed(src, 32));
1449 }
1450 break;
1451 case MESA_ARRAY_FORMAT_TYPE_INT:
1452 SWIZZLE_CONVERT(int32_t, int32_t, src);
1453 break;
1454 default:
1455 assert(!"Invalid channel type combination");
1456 }
1457 }
1458
1459
1460 /**
1461 * Convert between array-based color formats.
1462 *
1463 * Most format conversion operations required by GL can be performed by
1464 * converting one channel at a time, shuffling the channels around, and
1465 * optionally filling missing channels with zeros and ones. This function
1466 * does just that in a general, yet efficient, way.
1467 *
1468 * The swizzle parameter is an array of 4 numbers (see
1469 * _mesa_get_format_swizzle) that describes where each channel in the
1470 * destination should come from in the source. If swizzle[i] < 4 then it
1471 * means that dst[i] = CONVERT(src[swizzle[i]]). If swizzle[i] is
1472 * MESA_FORMAT_SWIZZLE_ZERO or MESA_FORMAT_SWIZZLE_ONE, the corresponding
1473 * dst[i] will be filled with the appropreate representation of zero or one
1474 * respectively.
1475 *
1476 * Under most circumstances, the source and destination images must be
1477 * different as no care is taken not to clobber one with the other.
1478 * However, if they have the same number of bits per pixel, it is safe to
1479 * do an in-place conversion.
1480 *
1481 * \param[out] dst pointer to where the converted data should
1482 * be stored
1483 *
1484 * \param[in] dst_type the destination GL type of the converted
1485 * data (GL_BYTE, etc.)
1486 *
1487 * \param[in] num_dst_channels the number of channels in the converted
1488 * data
1489 *
1490 * \param[in] src pointer to the source data
1491 *
1492 * \param[in] src_type the GL type of the source data (GL_BYTE,
1493 * etc.)
1494 *
1495 * \param[in] num_src_channels the number of channels in the source data
1496 * (the number of channels total, not just
1497 * the number used)
1498 *
1499 * \param[in] swizzle describes how to get the destination data
1500 * from the source data.
1501 *
1502 * \param[in] normalized for integer types, this indicates whether
1503 * the data should be considered as integers
1504 * or as normalized integers;
1505 *
1506 * \param[in] count the number of pixels to convert
1507 */
1508 void
1509 _mesa_swizzle_and_convert(void *void_dst, enum mesa_array_format_datatype dst_type, int num_dst_channels,
1510 const void *void_src, enum mesa_array_format_datatype src_type, int num_src_channels,
1511 const uint8_t swizzle[4], bool normalized, int count)
1512 {
1513 if (swizzle_convert_try_memcpy(void_dst, dst_type, num_dst_channels,
1514 void_src, src_type, num_src_channels,
1515 swizzle, normalized, count))
1516 return;
1517
1518 switch (dst_type) {
1519 case MESA_ARRAY_FORMAT_TYPE_FLOAT:
1520 convert_float(void_dst, num_dst_channels, void_src, src_type,
1521 num_src_channels, swizzle, normalized, count);
1522 break;
1523 case MESA_ARRAY_FORMAT_TYPE_HALF:
1524 convert_half_float(void_dst, num_dst_channels, void_src, src_type,
1525 num_src_channels, swizzle, normalized, count);
1526 break;
1527 case MESA_ARRAY_FORMAT_TYPE_UBYTE:
1528 convert_ubyte(void_dst, num_dst_channels, void_src, src_type,
1529 num_src_channels, swizzle, normalized, count);
1530 break;
1531 case MESA_ARRAY_FORMAT_TYPE_BYTE:
1532 convert_byte(void_dst, num_dst_channels, void_src, src_type,
1533 num_src_channels, swizzle, normalized, count);
1534 break;
1535 case MESA_ARRAY_FORMAT_TYPE_USHORT:
1536 convert_ushort(void_dst, num_dst_channels, void_src, src_type,
1537 num_src_channels, swizzle, normalized, count);
1538 break;
1539 case MESA_ARRAY_FORMAT_TYPE_SHORT:
1540 convert_short(void_dst, num_dst_channels, void_src, src_type,
1541 num_src_channels, swizzle, normalized, count);
1542 break;
1543 case MESA_ARRAY_FORMAT_TYPE_UINT:
1544 convert_uint(void_dst, num_dst_channels, void_src, src_type,
1545 num_src_channels, swizzle, normalized, count);
1546 break;
1547 case MESA_ARRAY_FORMAT_TYPE_INT:
1548 convert_int(void_dst, num_dst_channels, void_src, src_type,
1549 num_src_channels, swizzle, normalized, count);
1550 break;
1551 default:
1552 assert(!"Invalid channel type");
1553 }
1554 }