multisample.c revision f9995b30756140724f41daf963fa06167912be7f 
1/*
2 * Mesa 3-D graphics library
3 * Version:  7.1
4 *
5 * Copyright (C) 1999-2007  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#include "main/glheader.h"
27#include "main/context.h"
28#include "main/macros.h"
29#include "main/multisample.h"
30
31
32/**
33 * Called via glSampleCoverageARB
34 */
35void GLAPIENTRY
36_mesa_SampleCoverageARB(GLclampf value, GLboolean invert)
37{
38   GET_CURRENT_CONTEXT(ctx);
39
40   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx );
41
42   ctx->Multisample.SampleCoverageValue = (GLfloat) CLAMP(value, 0.0, 1.0);
43   ctx->Multisample.SampleCoverageInvert = invert;
44   ctx->NewState |= _NEW_MULTISAMPLE;
45}
46
47
48/**
49 * Initialize the context's multisample state.
50 * \param ctx  the GL context.
51 */
52void
53_mesa_init_multisample(struct gl_context *ctx)
54{
55   ctx->Multisample.Enabled = GL_TRUE;
56   ctx->Multisample.SampleAlphaToCoverage = GL_FALSE;
57   ctx->Multisample.SampleAlphaToOne = GL_FALSE;
58   ctx->Multisample.SampleCoverage = GL_FALSE;
59   ctx->Multisample.SampleCoverageValue = 1.0;
60   ctx->Multisample.SampleCoverageInvert = GL_FALSE;
61}
62