src/mesa/main/texcompress.h

   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 mesa_format
  40 _mesa_glenum_to_compressed_format(GLenum format);
  41
  42 extern GLenum
  43 _mesa_compressed_format_to_glenum(struct gl_context *ctx, mesa_format mesaFormat);
  44
  45 extern 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 */
  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(mesa_format format);
  59
  60
  61 extern 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 */