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  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.  
  31. struct gl_context;
  32.  
  33. extern GLenum
  34. _mesa_gl_compressed_format_base_format(GLenum format);
  35.  
  36. extern GLuint
  37. _mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats);
  38.  
  39. extern gl_format
  40. _mesa_glenum_to_compressed_format(GLenum format);
  41.  
  42. extern GLenum
  43. _mesa_compressed_format_to_glenum(struct gl_context *ctx, gl_format mesaFormat);
  44.  
  45. extern GLubyte *
  46. _mesa_compressed_image_address(GLint col, GLint row, GLint img,
  47.                                gl_format mesaFormat,
  48.                                GLsizei width, const GLubyte *image);
  49.  
  50.  
  51. /** A function to fetch one texel from a compressed texture */
  52. typedef void (*compressed_fetch_func)(const GLubyte *map,
  53.                                       GLint rowStride,
  54.                                       GLint i, GLint j,
  55.                                       GLfloat *texel);
  56.  
  57. extern compressed_fetch_func
  58. _mesa_get_compressed_fetch_func(gl_format format);
  59.  
  60.  
  61. extern void
  62. _mesa_decompress_image(gl_format format, GLuint width, GLuint height,
  63.                        const GLubyte *src, GLint srcRowStride,
  64.                        GLfloat *dest);
  65.  
  66. #endif /* TEXCOMPRESS_H */
  67.