src/mesa/main/texcompress.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5.1
   4  *
   5  * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #ifndef TEXCOMPRESS_H
  27 #define TEXCOMPRESS_H
  28
  29 #include "formats.h"
  30 #include "glheader.h"
  31
  32 struct gl_context;
  33
  34 extern GLenum
  35 _mesa_gl_compressed_format_base_format(GLenum format);
  36
  37 extern GLuint
  38 _mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats);
  39
  40 extern gl_format
  41 _mesa_glenum_to_compressed_format(GLenum format);
  42
  43 extern GLenum
  44 _mesa_compressed_format_to_glenum(struct gl_context *ctx, gl_format mesaFormat);
  45
  46 extern GLubyte *
  47 _mesa_compressed_image_address(GLint col, GLint row, GLint img,
  48                                gl_format mesaFormat,
  49                                GLsizei width, const GLubyte *image);
  50
  51
  52 /** A function to fetch one texel from a compressed texture */
  53 typedef void (*compressed_fetch_func)(const GLubyte *map,
  54                                       const GLuint imageOffsets[],
  55                                       GLint rowStride,
  56                                       GLint i, GLint j, GLint k,
  57                                       GLfloat *texel);
  58
  59 extern compressed_fetch_func
  60 _mesa_get_compressed_fetch_func(gl_format format);
  61
  62
  63 extern void
  64 _mesa_decompress_image(gl_format format, GLuint width, GLuint height,
  65                        const GLubyte *src, GLint srcRowStride,
  66                        GLfloat *dest);
  67
  68 #endif /* TEXCOMPRESS_H */