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
32struct gl_context;
33struct gl_pixelstore_attrib;
34
35
36extern GLboolean
37_mesa_readpixels_needs_slow_path(const struct gl_context *ctx, GLenum format,
38                                 GLenum type, GLboolean uses_blit);
39
40extern GLboolean
41_mesa_need_rgb_to_luminance_conversion(GLenum srcBaseFormat,
42                                       GLenum dstBaseFormat);
43
44extern GLboolean
45_mesa_need_luminance_to_rgb_conversion(GLenum srcBaseFormat,
46                                       GLenum dstBaseFormat);
47
48extern 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
54extern 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
61void GLAPIENTRY
62_mesa_ReadPixels_no_error(GLint x, GLint y, GLsizei width, GLsizei height,
63                          GLenum format, GLenum type, GLvoid *pixels);
64
65extern void GLAPIENTRY
66_mesa_ReadPixels( GLint x, GLint y, GLsizei width, GLsizei height,
67                  GLenum format, GLenum type, GLvoid *pixels );
68
69void 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
74extern 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
80