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3 * Copyright 2010 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
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11 * permit persons to whom the Software is furnished to do so, subject to
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14 * The above copyright notice and this permission notice (including the
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18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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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>
39 util_format_read_4f(enum pipe_format format
,
40 float *dst
, unsigned dst_stride
,
41 const void *src
, unsigned src_stride
,
42 unsigned x
, unsigned y
, unsigned w
, unsigned h
)
44 const struct util_format_description
*format_desc
;
45 const uint8_t *src_row
;
50 format_desc
= util_format_description(format
);
52 assert(x
% format_desc
->block
.width
== 0);
53 assert(y
% format_desc
->block
.height
== 0);
55 src_row
= (const uint8_t *)src
+ y
*src_stride
+ x
*(format_desc
->block
.bits
/8);
57 row_blocks
= (w
+ format_desc
->block
.width
- 1) / format_desc
->block
.width
;
59 for (i
= 0; i
< h
; i
+= format_desc
->block
.height
) {
60 format_desc
->unpack_float(dst_row
, src_row
, row_blocks
);
61 src_row
+= src_stride
;
62 dst_row
+= dst_stride
/sizeof(*dst_row
);
68 util_format_write_4f(enum pipe_format format
,
69 const float *src
, unsigned src_stride
,
70 void *dst
, unsigned dst_stride
,
71 unsigned x
, unsigned y
, unsigned w
, unsigned h
)
73 const struct util_format_description
*format_desc
;
79 format_desc
= util_format_description(format
);
81 assert(x
% format_desc
->block
.width
== 0);
82 assert(y
% format_desc
->block
.height
== 0);
84 dst_row
= (uint8_t *)dst
+ y
*dst_stride
+ x
*(format_desc
->block
.bits
/8);
86 row_blocks
= (w
+ format_desc
->block
.width
- 1) / format_desc
->block
.width
;
88 for (i
= 0; i
< h
; i
+= format_desc
->block
.height
) {
89 format_desc
->pack_float(dst_row
, src_row
, row_blocks
);
90 dst_row
+= dst_stride
;
91 src_row
+= src_stride
/sizeof(*src_row
);
97 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
)
99 const struct util_format_description
*format_desc
;
100 const uint8_t *src_row
;
105 format_desc
= util_format_description(format
);
107 assert(x
% format_desc
->block
.width
== 0);
108 assert(y
% format_desc
->block
.height
== 0);
110 src_row
= (const uint8_t *)src
+ y
*src_stride
+ x
*(format_desc
->block
.bits
/8);
112 row_blocks
= (w
+ format_desc
->block
.width
- 1) / format_desc
->block
.width
;
114 for (i
= 0; i
< h
; i
+= format_desc
->block
.height
) {
115 format_desc
->unpack_8unorm(dst_row
, src_row
, row_blocks
);
116 src_row
+= src_stride
;
117 dst_row
+= dst_stride
/sizeof(*dst_row
);
123 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
)
125 const struct util_format_description
*format_desc
;
127 const uint8_t *src_row
;
131 format_desc
= util_format_description(format
);
133 assert(x
% format_desc
->block
.width
== 0);
134 assert(y
% format_desc
->block
.height
== 0);
136 dst_row
= (uint8_t *)dst
+ y
*dst_stride
+ x
*(format_desc
->block
.bits
/8);
138 row_blocks
= (w
+ format_desc
->block
.width
- 1) / format_desc
->block
.width
;
140 for (i
= 0; i
< h
; i
+= format_desc
->block
.height
) {
141 format_desc
->pack_8unorm(dst_row
, src_row
, row_blocks
);
142 dst_row
+= dst_stride
;
143 src_row
+= src_stride
/sizeof(*src_row
);