2 * Copyright (C) 2011 LunarG, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
25 * \file texcompress_etc.c
26 * GL_OES_compressed_ETC1_RGB8_texture support.
30 #include "mfeatures.h"
31 #include "texcompress.h"
32 #include "texcompress_etc.h"
35 #include "swrast/s_context.h"
38 _mesa_texstore_etc1_rgb8(TEXSTORE_PARAMS
)
40 /* GL_ETC1_RGB8_OES is only valid in glCompressedTexImage2D */
46 /* define etc1_parse_block and etc. */
47 #define UINT8_TYPE GLubyte
49 #include "texcompress_etc_tmp.h"
54 _mesa_fetch_texel_2d_f_etc1_rgb8(const struct swrast_texture_image
*texImage
,
55 GLint i
, GLint j
, GLint k
, GLfloat
*texel
)
57 struct etc1_block block
;
61 src
= (const GLubyte
*) texImage
->Data
+
62 (((texImage
->RowStride
+ 3) / 4) * (j
/ 4) + (i
/ 4)) * 8;
64 etc1_parse_block(&block
, src
);
65 etc1_fetch_texel(&block
, i
% 4, j
% 4, dst
);
67 texel
[RCOMP
] = UBYTE_TO_FLOAT(dst
[0]);
68 texel
[GCOMP
] = UBYTE_TO_FLOAT(dst
[1]);
69 texel
[BCOMP
] = UBYTE_TO_FLOAT(dst
[2]);