s_depth.h revision c1f859d4 
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 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26#ifndef S_DEPTH_H
27#define S_DEPTH_H
28
29
30#include "s_context.h"
31
32
33extern GLuint
34_swrast_depth_test_span( GLcontext *ctx, SWspan *span);
35
36
37extern GLboolean
38_swrast_depth_bounds_test( GLcontext *ctx, SWspan *span );
39
40
41extern void
42_swrast_read_depth_span_float( GLcontext *ctx, struct gl_renderbuffer *rb,
43                               GLint n, GLint x, GLint y, GLfloat depth[] );
44
45
46extern void
47_swrast_read_depth_span_uint( GLcontext *ctx, struct gl_renderbuffer *rb,
48                              GLint n, GLint x, GLint y, GLuint depth[] );
49
50
51extern void
52_swrast_clear_depth_buffer( GLcontext *ctx, struct gl_renderbuffer *rb );
53
54
55#endif
56