1 /**************************************************************************
3 * Copyright 2010 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
30 * Pixel format accessor functions.
32 * @author Jose Fonseca <jfonseca@vmware.com>
37 #include "u_format_s3tc.h"
38 #include "u_surface.h"
39 #include "util/u_math.h"
41 #include "pipe/p_defines.h"
45 util_format_is_float(enum pipe_format format
)
47 const struct util_format_description
*desc
= util_format_description(format
);
55 i
= util_format_get_first_non_void_channel(format
);
60 return desc
->channel
[i
].type
== UTIL_FORMAT_TYPE_FLOAT
? TRUE
: FALSE
;
64 /** Test if the format contains RGB, but not alpha */
66 util_format_has_alpha(enum pipe_format format
)
68 const struct util_format_description
*desc
=
69 util_format_description(format
);
71 return (desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
72 desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) &&
73 desc
->swizzle
[3] != PIPE_SWIZZLE_1
;
78 util_format_is_luminance(enum pipe_format format
)
80 const struct util_format_description
*desc
=
81 util_format_description(format
);
83 if ((desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
84 desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) &&
85 desc
->swizzle
[0] == PIPE_SWIZZLE_X
&&
86 desc
->swizzle
[1] == PIPE_SWIZZLE_X
&&
87 desc
->swizzle
[2] == PIPE_SWIZZLE_X
&&
88 desc
->swizzle
[3] == PIPE_SWIZZLE_1
) {
95 util_format_is_alpha(enum pipe_format format
)
97 const struct util_format_description
*desc
=
98 util_format_description(format
);
100 if ((desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
101 desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) &&
102 desc
->swizzle
[0] == PIPE_SWIZZLE_0
&&
103 desc
->swizzle
[1] == PIPE_SWIZZLE_0
&&
104 desc
->swizzle
[2] == PIPE_SWIZZLE_0
&&
105 desc
->swizzle
[3] == PIPE_SWIZZLE_X
) {
112 util_format_is_pure_integer(enum pipe_format format
)
114 const struct util_format_description
*desc
= util_format_description(format
);
117 /* Find the first non-void channel. */
118 i
= util_format_get_first_non_void_channel(format
);
122 return desc
->channel
[i
].pure_integer
? TRUE
: FALSE
;
126 util_format_is_pure_sint(enum pipe_format format
)
128 const struct util_format_description
*desc
= util_format_description(format
);
131 i
= util_format_get_first_non_void_channel(format
);
135 return (desc
->channel
[i
].type
== UTIL_FORMAT_TYPE_SIGNED
&& desc
->channel
[i
].pure_integer
) ? TRUE
: FALSE
;
139 util_format_is_pure_uint(enum pipe_format format
)
141 const struct util_format_description
*desc
= util_format_description(format
);
144 i
= util_format_get_first_non_void_channel(format
);
148 return (desc
->channel
[i
].type
== UTIL_FORMAT_TYPE_UNSIGNED
&& desc
->channel
[i
].pure_integer
) ? TRUE
: FALSE
;
152 * Returns true if all non-void channels are normalized signed.
155 util_format_is_snorm(enum pipe_format format
)
157 const struct util_format_description
*desc
= util_format_description(format
);
163 i
= util_format_get_first_non_void_channel(format
);
167 return desc
->channel
[i
].type
== UTIL_FORMAT_TYPE_SIGNED
&&
168 !desc
->channel
[i
].pure_integer
&&
169 desc
->channel
[i
].normalized
;
173 util_format_is_snorm8(enum pipe_format format
)
175 const struct util_format_description
*desc
= util_format_description(format
);
181 i
= util_format_get_first_non_void_channel(format
);
185 return desc
->channel
[i
].type
== UTIL_FORMAT_TYPE_SIGNED
&&
186 !desc
->channel
[i
].pure_integer
&&
187 desc
->channel
[i
].normalized
&&
188 desc
->channel
[i
].size
== 8;
192 util_format_is_luminance_alpha(enum pipe_format format
)
194 const struct util_format_description
*desc
=
195 util_format_description(format
);
197 if ((desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
198 desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) &&
199 desc
->swizzle
[0] == PIPE_SWIZZLE_X
&&
200 desc
->swizzle
[1] == PIPE_SWIZZLE_X
&&
201 desc
->swizzle
[2] == PIPE_SWIZZLE_X
&&
202 desc
->swizzle
[3] == PIPE_SWIZZLE_Y
) {
210 util_format_is_intensity(enum pipe_format format
)
212 const struct util_format_description
*desc
=
213 util_format_description(format
);
215 if ((desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
216 desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) &&
217 desc
->swizzle
[0] == PIPE_SWIZZLE_X
&&
218 desc
->swizzle
[1] == PIPE_SWIZZLE_X
&&
219 desc
->swizzle
[2] == PIPE_SWIZZLE_X
&&
220 desc
->swizzle
[3] == PIPE_SWIZZLE_X
) {
227 util_format_is_subsampled_422(enum pipe_format format
)
229 const struct util_format_description
*desc
=
230 util_format_description(format
);
232 return desc
->layout
== UTIL_FORMAT_LAYOUT_SUBSAMPLED
&&
233 desc
->block
.width
== 2 &&
234 desc
->block
.height
== 1 &&
235 desc
->block
.bits
== 32;
239 * Calculates the MRD for the depth format. MRD is used in depth bias
240 * for UNORM and unbound depth buffers. When the depth buffer is floating
241 * point, the depth bias calculation does not use the MRD. However, the
242 * default MRD will be 1.0 / ((1 << 24) - 1).
245 util_get_depth_format_mrd(const struct util_format_description
*desc
)
248 * Depth buffer formats without a depth component OR scenarios
249 * without a bound depth buffer default to D24.
251 double mrd
= 1.0 / ((1 << 24) - 1);
252 unsigned depth_channel
;
257 * Some depth formats do not store the depth component in the first
258 * channel, detect the format and adjust the depth channel. Get the
259 * swizzled depth component channel.
261 depth_channel
= desc
->swizzle
[0];
263 if (desc
->channel
[depth_channel
].type
== UTIL_FORMAT_TYPE_UNSIGNED
&&
264 desc
->channel
[depth_channel
].normalized
) {
267 depth_bits
= desc
->channel
[depth_channel
].size
;
268 mrd
= 1.0 / ((1ULL << depth_bits
) - 1);
276 util_format_read_4f(enum pipe_format format
,
277 float *dst
, unsigned dst_stride
,
278 const void *src
, unsigned src_stride
,
279 unsigned x
, unsigned y
, unsigned w
, unsigned h
)
281 const struct util_format_description
*format_desc
;
282 const uint8_t *src_row
;
285 format_desc
= util_format_description(format
);
287 assert(x
% format_desc
->block
.width
== 0);
288 assert(y
% format_desc
->block
.height
== 0);
290 src_row
= (const uint8_t *)src
+ y
*src_stride
+ x
*(format_desc
->block
.bits
/8);
293 format_desc
->unpack_rgba_float(dst_row
, dst_stride
, src_row
, src_stride
, w
, h
);
298 util_format_write_4f(enum pipe_format format
,
299 const float *src
, unsigned src_stride
,
300 void *dst
, unsigned dst_stride
,
301 unsigned x
, unsigned y
, unsigned w
, unsigned h
)
303 const struct util_format_description
*format_desc
;
305 const float *src_row
;
307 format_desc
= util_format_description(format
);
309 assert(x
% format_desc
->block
.width
== 0);
310 assert(y
% format_desc
->block
.height
== 0);
312 dst_row
= (uint8_t *)dst
+ y
*dst_stride
+ x
*(format_desc
->block
.bits
/8);
315 format_desc
->pack_rgba_float(dst_row
, dst_stride
, src_row
, src_stride
, w
, h
);
320 util_format_read_4ub(enum pipe_format format
, uint8_t *dst
, unsigned dst_stride
, const void *src
, unsigned src_stride
, unsigned x
, unsigned y
, unsigned w
, unsigned h
)
322 const struct util_format_description
*format_desc
;
323 const uint8_t *src_row
;
326 format_desc
= util_format_description(format
);
328 assert(x
% format_desc
->block
.width
== 0);
329 assert(y
% format_desc
->block
.height
== 0);
331 src_row
= (const uint8_t *)src
+ y
*src_stride
+ x
*(format_desc
->block
.bits
/8);
334 format_desc
->unpack_rgba_8unorm(dst_row
, dst_stride
, src_row
, src_stride
, w
, h
);
339 util_format_write_4ub(enum pipe_format format
, const uint8_t *src
, unsigned src_stride
, void *dst
, unsigned dst_stride
, unsigned x
, unsigned y
, unsigned w
, unsigned h
)
341 const struct util_format_description
*format_desc
;
343 const uint8_t *src_row
;
345 format_desc
= util_format_description(format
);
347 assert(x
% format_desc
->block
.width
== 0);
348 assert(y
% format_desc
->block
.height
== 0);
350 dst_row
= (uint8_t *)dst
+ y
*dst_stride
+ x
*(format_desc
->block
.bits
/8);
353 format_desc
->pack_rgba_8unorm(dst_row
, dst_stride
, src_row
, src_stride
, w
, h
);
357 util_format_read_4ui(enum pipe_format format
,
358 unsigned *dst
, unsigned dst_stride
,
359 const void *src
, unsigned src_stride
,
360 unsigned x
, unsigned y
, unsigned w
, unsigned h
)
362 const struct util_format_description
*format_desc
;
363 const uint8_t *src_row
;
366 format_desc
= util_format_description(format
);
368 assert(x
% format_desc
->block
.width
== 0);
369 assert(y
% format_desc
->block
.height
== 0);
371 src_row
= (const uint8_t *)src
+ y
*src_stride
+ x
*(format_desc
->block
.bits
/8);
374 format_desc
->unpack_rgba_uint(dst_row
, dst_stride
, src_row
, src_stride
, w
, h
);
378 util_format_write_4ui(enum pipe_format format
,
379 const unsigned int *src
, unsigned src_stride
,
380 void *dst
, unsigned dst_stride
,
381 unsigned x
, unsigned y
, unsigned w
, unsigned h
)
383 const struct util_format_description
*format_desc
;
385 const uint32_t *src_row
;
387 format_desc
= util_format_description(format
);
389 assert(x
% format_desc
->block
.width
== 0);
390 assert(y
% format_desc
->block
.height
== 0);
392 dst_row
= (uint8_t *)dst
+ y
*dst_stride
+ x
*(format_desc
->block
.bits
/8);
395 format_desc
->pack_rgba_uint(dst_row
, dst_stride
, src_row
, src_stride
, w
, h
);
399 util_format_read_4i(enum pipe_format format
,
400 int *dst
, unsigned dst_stride
,
401 const void *src
, unsigned src_stride
,
402 unsigned x
, unsigned y
, unsigned w
, unsigned h
)
404 const struct util_format_description
*format_desc
;
405 const uint8_t *src_row
;
408 format_desc
= util_format_description(format
);
410 assert(x
% format_desc
->block
.width
== 0);
411 assert(y
% format_desc
->block
.height
== 0);
413 src_row
= (const uint8_t *)src
+ y
*src_stride
+ x
*(format_desc
->block
.bits
/8);
416 format_desc
->unpack_rgba_sint(dst_row
, dst_stride
, src_row
, src_stride
, w
, h
);
420 util_format_write_4i(enum pipe_format format
,
421 const int *src
, unsigned src_stride
,
422 void *dst
, unsigned dst_stride
,
423 unsigned x
, unsigned y
, unsigned w
, unsigned h
)
425 const struct util_format_description
*format_desc
;
427 const int32_t *src_row
;
429 format_desc
= util_format_description(format
);
431 assert(x
% format_desc
->block
.width
== 0);
432 assert(y
% format_desc
->block
.height
== 0);
434 dst_row
= (uint8_t *)dst
+ y
*dst_stride
+ x
*(format_desc
->block
.bits
/8);
437 format_desc
->pack_rgba_sint(dst_row
, dst_stride
, src_row
, src_stride
, w
, h
);
441 * Check if we can safely memcopy from the source format to the dest format.
442 * This basically covers the cases of a "used" channel copied to a typeless
443 * channel, plus some 1-channel cases.
444 * Examples of compatible copy formats include:
445 * b8g8r8a8_unorm -> b8g8r8x8_unorm
446 * a8r8g8b8_unorm -> x8r8g8b8_unorm
447 * b5g5r5a1_unorm -> b5g5r5x1_unorm
448 * b4g4r4a4_unorm -> b4g4r4x4_unorm
449 * l8_unorm -> r8_unorm
450 * i8_unorm -> l8_unorm
451 * i8_unorm -> a8_unorm
452 * i8_unorm -> r8_unorm
453 * l16_unorm -> r16_unorm
454 * z24_unorm_s8_uint -> z24x8_unorm
455 * s8_uint_z24_unorm -> x8z24_unorm
456 * r8g8b8a8_unorm -> r8g8b8x8_unorm
457 * a8b8g8r8_srgb -> x8b8g8r8_srgb
458 * b8g8r8a8_srgb -> b8g8r8x8_srgb
459 * a8r8g8b8_srgb -> x8r8g8b8_srgb
460 * a8b8g8r8_unorm -> x8b8g8r8_unorm
461 * r10g10b10a2_uscaled -> r10g10b10x2_uscaled
462 * r10sg10sb10sa2u_norm -> r10g10b10x2_snorm
465 util_is_format_compatible(const struct util_format_description
*src_desc
,
466 const struct util_format_description
*dst_desc
)
470 if (src_desc
->format
== dst_desc
->format
) {
474 if (src_desc
->layout
!= UTIL_FORMAT_LAYOUT_PLAIN
||
475 dst_desc
->layout
!= UTIL_FORMAT_LAYOUT_PLAIN
) {
479 if (src_desc
->block
.bits
!= dst_desc
->block
.bits
||
480 src_desc
->nr_channels
!= dst_desc
->nr_channels
||
481 src_desc
->colorspace
!= dst_desc
->colorspace
) {
485 for (chan
= 0; chan
< 4; ++chan
) {
486 if (src_desc
->channel
[chan
].size
!=
487 dst_desc
->channel
[chan
].size
) {
492 for (chan
= 0; chan
< 4; ++chan
) {
493 enum pipe_swizzle swizzle
= dst_desc
->swizzle
[chan
];
496 if (src_desc
->swizzle
[chan
] != swizzle
) {
499 if ((src_desc
->channel
[swizzle
].type
!=
500 dst_desc
->channel
[swizzle
].type
) ||
501 (src_desc
->channel
[swizzle
].normalized
!=
502 dst_desc
->channel
[swizzle
].normalized
)) {
513 util_format_fits_8unorm(const struct util_format_description
*format_desc
)
518 * After linearized sRGB values require more than 8bits.
521 if (format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) {
525 switch (format_desc
->layout
) {
527 case UTIL_FORMAT_LAYOUT_S3TC
:
529 * These are straight forward.
532 case UTIL_FORMAT_LAYOUT_RGTC
:
533 if (format_desc
->format
== PIPE_FORMAT_RGTC1_SNORM
||
534 format_desc
->format
== PIPE_FORMAT_RGTC2_SNORM
||
535 format_desc
->format
== PIPE_FORMAT_LATC1_SNORM
||
536 format_desc
->format
== PIPE_FORMAT_LATC2_SNORM
)
539 case UTIL_FORMAT_LAYOUT_BPTC
:
540 if (format_desc
->format
== PIPE_FORMAT_BPTC_RGBA_UNORM
)
544 case UTIL_FORMAT_LAYOUT_ETC
:
545 if (format_desc
->format
== PIPE_FORMAT_ETC1_RGB8
)
549 case UTIL_FORMAT_LAYOUT_PLAIN
:
551 * For these we can find a generic rule.
554 for (chan
= 0; chan
< format_desc
->nr_channels
; ++chan
) {
555 switch (format_desc
->channel
[chan
].type
) {
556 case UTIL_FORMAT_TYPE_VOID
:
558 case UTIL_FORMAT_TYPE_UNSIGNED
:
559 if (!format_desc
->channel
[chan
].normalized
||
560 format_desc
->channel
[chan
].size
> 8) {
572 * Handle all others on a case by case basis.
575 switch (format_desc
->format
) {
576 case PIPE_FORMAT_R1_UNORM
:
577 case PIPE_FORMAT_UYVY
:
578 case PIPE_FORMAT_YUYV
:
579 case PIPE_FORMAT_R8G8_B8G8_UNORM
:
580 case PIPE_FORMAT_G8R8_G8B8_UNORM
:
591 util_format_translate(enum pipe_format dst_format
,
592 void *dst
, unsigned dst_stride
,
593 unsigned dst_x
, unsigned dst_y
,
594 enum pipe_format src_format
,
595 const void *src
, unsigned src_stride
,
596 unsigned src_x
, unsigned src_y
,
597 unsigned width
, unsigned height
)
599 const struct util_format_description
*dst_format_desc
;
600 const struct util_format_description
*src_format_desc
;
602 const uint8_t *src_row
;
603 unsigned x_step
, y_step
;
607 dst_format_desc
= util_format_description(dst_format
);
608 src_format_desc
= util_format_description(src_format
);
610 if (util_is_format_compatible(src_format_desc
, dst_format_desc
)) {
615 util_copy_rect(dst
, dst_format
, dst_stride
, dst_x
, dst_y
,
616 width
, height
, src
, (int)src_stride
,
621 assert(dst_x
% dst_format_desc
->block
.width
== 0);
622 assert(dst_y
% dst_format_desc
->block
.height
== 0);
623 assert(src_x
% src_format_desc
->block
.width
== 0);
624 assert(src_y
% src_format_desc
->block
.height
== 0);
626 dst_row
= (uint8_t *)dst
+ dst_y
*dst_stride
+ dst_x
*(dst_format_desc
->block
.bits
/8);
627 src_row
= (const uint8_t *)src
+ src_y
*src_stride
+ src_x
*(src_format_desc
->block
.bits
/8);
630 * This works because all pixel formats have pixel blocks with power of two
634 y_step
= MAX2(dst_format_desc
->block
.height
, src_format_desc
->block
.height
);
635 x_step
= MAX2(dst_format_desc
->block
.width
, src_format_desc
->block
.width
);
636 assert(y_step
% dst_format_desc
->block
.height
== 0);
637 assert(y_step
% src_format_desc
->block
.height
== 0);
639 dst_step
= y_step
/ dst_format_desc
->block
.height
* dst_stride
;
640 src_step
= y_step
/ src_format_desc
->block
.height
* src_stride
;
643 * TODO: double formats will loose precision
644 * TODO: Add a special case for formats that are mere swizzles of each other
647 if (src_format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_ZS
||
648 dst_format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_ZS
) {
650 uint8_t *tmp_s
= NULL
;
655 if (src_format_desc
->unpack_z_float
&&
656 dst_format_desc
->pack_z_float
) {
657 tmp_z
= MALLOC(width
* sizeof *tmp_z
);
660 if (src_format_desc
->unpack_s_8uint
&&
661 dst_format_desc
->pack_s_8uint
) {
662 tmp_s
= MALLOC(width
* sizeof *tmp_s
);
667 src_format_desc
->unpack_z_float(tmp_z
, 0, src_row
, src_stride
, width
, 1);
668 dst_format_desc
->pack_z_float(dst_row
, dst_stride
, tmp_z
, 0, width
, 1);
672 src_format_desc
->unpack_s_8uint(tmp_s
, 0, src_row
, src_stride
, width
, 1);
673 dst_format_desc
->pack_s_8uint(dst_row
, dst_stride
, tmp_s
, 0, width
, 1);
687 if (util_format_fits_8unorm(src_format_desc
) ||
688 util_format_fits_8unorm(dst_format_desc
)) {
692 if (!src_format_desc
->unpack_rgba_8unorm
||
693 !dst_format_desc
->pack_rgba_8unorm
) {
697 tmp_stride
= MAX2(width
, x_step
) * 4 * sizeof *tmp_row
;
698 tmp_row
= MALLOC(y_step
* tmp_stride
);
702 while (height
>= y_step
) {
703 src_format_desc
->unpack_rgba_8unorm(tmp_row
, tmp_stride
, src_row
, src_stride
, width
, y_step
);
704 dst_format_desc
->pack_rgba_8unorm(dst_row
, dst_stride
, tmp_row
, tmp_stride
, width
, y_step
);
712 src_format_desc
->unpack_rgba_8unorm(tmp_row
, tmp_stride
, src_row
, src_stride
, width
, height
);
713 dst_format_desc
->pack_rgba_8unorm(dst_row
, dst_stride
, tmp_row
, tmp_stride
, width
, height
);
722 if (!src_format_desc
->unpack_rgba_float
||
723 !dst_format_desc
->pack_rgba_float
) {
727 tmp_stride
= MAX2(width
, x_step
) * 4 * sizeof *tmp_row
;
728 tmp_row
= MALLOC(y_step
* tmp_stride
);
732 while (height
>= y_step
) {
733 src_format_desc
->unpack_rgba_float(tmp_row
, tmp_stride
, src_row
, src_stride
, width
, y_step
);
734 dst_format_desc
->pack_rgba_float(dst_row
, dst_stride
, tmp_row
, tmp_stride
, width
, y_step
);
742 src_format_desc
->unpack_rgba_float(tmp_row
, tmp_stride
, src_row
, src_stride
, width
, height
);
743 dst_format_desc
->pack_rgba_float(dst_row
, dst_stride
, tmp_row
, tmp_stride
, width
, height
);
752 util_format_translate_3d(enum pipe_format dst_format
,
753 void *dst
, unsigned dst_stride
,
754 unsigned dst_slice_stride
,
755 unsigned dst_x
, unsigned dst_y
,
757 enum pipe_format src_format
,
758 const void *src
, unsigned src_stride
,
759 unsigned src_slice_stride
,
760 unsigned src_x
, unsigned src_y
,
761 unsigned src_z
, unsigned width
,
762 unsigned height
, unsigned depth
)
765 const uint8_t *src_layer
;
769 dst_layer
+= dst_z
* dst_slice_stride
;
770 src_layer
+= src_z
* src_slice_stride
;
771 for (z
= 0; z
< depth
; ++z
) {
772 if (!util_format_translate(dst_format
, dst_layer
, dst_stride
,
774 src_format
, src_layer
, src_stride
,
779 dst_layer
+= dst_slice_stride
;
780 src_layer
+= src_slice_stride
;
785 void util_format_compose_swizzles(const unsigned char swz1
[4],
786 const unsigned char swz2
[4],
787 unsigned char dst
[4])
791 for (i
= 0; i
< 4; i
++) {
792 dst
[i
] = swz2
[i
] <= PIPE_SWIZZLE_W
?
793 swz1
[swz2
[i
]] : swz2
[i
];
797 void util_format_apply_color_swizzle(union pipe_color_union
*dst
,
798 const union pipe_color_union
*src
,
799 const unsigned char swz
[4],
800 const boolean is_integer
)
805 for (c
= 0; c
< 4; ++c
) {
807 case PIPE_SWIZZLE_X
: dst
->ui
[c
] = src
->ui
[0]; break;
808 case PIPE_SWIZZLE_Y
: dst
->ui
[c
] = src
->ui
[1]; break;
809 case PIPE_SWIZZLE_Z
: dst
->ui
[c
] = src
->ui
[2]; break;
810 case PIPE_SWIZZLE_W
: dst
->ui
[c
] = src
->ui
[3]; break;
812 dst
->ui
[c
] = (swz
[c
] == PIPE_SWIZZLE_1
) ? 1 : 0;
817 for (c
= 0; c
< 4; ++c
) {
819 case PIPE_SWIZZLE_X
: dst
->f
[c
] = src
->f
[0]; break;
820 case PIPE_SWIZZLE_Y
: dst
->f
[c
] = src
->f
[1]; break;
821 case PIPE_SWIZZLE_Z
: dst
->f
[c
] = src
->f
[2]; break;
822 case PIPE_SWIZZLE_W
: dst
->f
[c
] = src
->f
[3]; break;
824 dst
->f
[c
] = (swz
[c
] == PIPE_SWIZZLE_1
) ? 1.0f
: 0.0f
;
831 void pipe_swizzle_4f(float *dst
, const float *src
,
832 const unsigned char swz
[4])
836 for (i
= 0; i
< 4; i
++) {
837 if (swz
[i
] <= PIPE_SWIZZLE_W
)
838 dst
[i
] = src
[swz
[i
]];
839 else if (swz
[i
] == PIPE_SWIZZLE_0
)
841 else if (swz
[i
] == PIPE_SWIZZLE_1
)
846 void util_format_unswizzle_4f(float *dst
, const float *src
,
847 const unsigned char swz
[4])
851 for (i
= 0; i
< 4; i
++) {