1/*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2006  Brian Paul   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#ifndef TEXCOMPRESS_H
26#define TEXCOMPRESS_H
27
28#include "formats.h"
29#include "glheader.h"
30
31struct gl_context;
32
33extern GLenum
34_mesa_gl_compressed_format_base_format(GLenum format);
35
36extern GLuint
37_mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats);
38
39extern mesa_format
40_mesa_glenum_to_compressed_format(GLenum format);
41
42extern GLenum
43_mesa_compressed_format_to_glenum(struct gl_context *ctx, mesa_format mesaFormat);
44
45extern GLubyte *
46_mesa_compressed_image_address(GLint col, GLint row, GLint img,
47                               mesa_format mesaFormat,
48                               GLsizei width, const GLubyte *image);
49
50
51/** A function to fetch one texel from a compressed texture */
52typedef void (*compressed_fetch_func)(const GLubyte *map,
53                                      GLint rowStride,
54                                      GLint i, GLint j,
55                                      GLfloat *texel);
56
57extern compressed_fetch_func
58_mesa_get_compressed_fetch_func(mesa_format format);
59
60
61extern void
62_mesa_decompress_image(mesa_format format, GLuint width, GLuint height,
63                       const GLubyte *src, GLint srcRowStride,
64                       GLfloat *dest);
65
66#endif /* TEXCOMPRESS_H */
67