src/mesa/main/readpix.h

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  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
  26 #ifndef READPIXELS_H
  27 #define READPIXELS_H
  28
  29
  30 #include "glheader.h"
  31
  32 struct gl_context;
  33 struct gl_pixelstore_attrib;
  34
  35
  36 extern GLboolean
  37 _mesa_readpixels_needs_slow_path(const struct gl_context *ctx, GLenum format,
  38                                  GLenum type, GLboolean uses_blit);
  39
  40 extern GLboolean
  41 _mesa_need_rgb_to_luminance_conversion(GLenum srcBaseFormat,
  42                                        GLenum dstBaseFormat);
  43
  44 extern GLboolean
  45 _mesa_need_luminance_to_rgb_conversion(GLenum srcBaseFormat,
  46                                        GLenum dstBaseFormat);
  47
  48 extern GLbitfield
  49 _mesa_get_readpixels_transfer_ops(const struct gl_context *ctx,
  50                                   mesa_format texFormat,
  51                                   GLenum format, GLenum type,
  52                                   GLboolean uses_blit);
  53
  54 extern void
  55 _mesa_readpixels(struct gl_context *ctx,
  56                  GLint x, GLint y, GLsizei width, GLsizei height,
  57                  GLenum format, GLenum type,
  58                  const struct gl_pixelstore_attrib *packing,
  59                  GLvoid *pixels);
  60
  61 void GLAPIENTRY
  62 _mesa_ReadPixels_no_error(GLint x, GLint y, GLsizei width, GLsizei height,
  63                           GLenum format, GLenum type, GLvoid *pixels);
  64
  65 extern void GLAPIENTRY
  66 _mesa_ReadPixels( GLint x, GLint y, GLsizei width, GLsizei height,
  67                   GLenum format, GLenum type, GLvoid *pixels );
  68
  69 void GLAPIENTRY
  70 _mesa_ReadnPixelsARB_no_error(GLint x, GLint y, GLsizei width, GLsizei height,
  71                                         GLenum format, GLenum type, GLsizei bufSize,
  72                               GLvoid *pixels);
  73
  74 extern void GLAPIENTRY
  75 _mesa_ReadnPixelsARB( GLint x, GLint y, GLsizei width, GLsizei height,
  76                       GLenum format, GLenum type, GLsizei bufSize,
  77                       GLvoid *pixels );
  78
  79 #endif