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 #include "main/mtypes.h"
31
32
33 /**
34 * Called via glSampleCoverageARB
35 */
36 void GLAPIENTRY
_mesa_SampleCoverageARB(GLclampf value,GLboolean invert)37 _mesa_SampleCoverageARB(GLclampf value, GLboolean invert)
38 {
39 GET_CURRENT_CONTEXT(ctx);
40
41 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx );
42
43 ctx->Multisample.SampleCoverageValue = (GLfloat) CLAMP(value, 0.0, 1.0);
44 ctx->Multisample.SampleCoverageInvert = invert;
45 ctx->NewState |= _NEW_MULTISAMPLE;
46 }
47
48
49 /**
50 * Initialize the context's multisample state.
51 * \param ctx the GL context.
52 */
53 void
_mesa_init_multisample(struct gl_context * ctx)54 _mesa_init_multisample(struct gl_context *ctx)
55 {
56 ctx->Multisample.Enabled = GL_TRUE;
57 ctx->Multisample.SampleAlphaToCoverage = GL_FALSE;
58 ctx->Multisample.SampleAlphaToOne = GL_FALSE;
59 ctx->Multisample.SampleCoverage = GL_FALSE;
60 ctx->Multisample.SampleCoverageValue = 1.0;
61 ctx->Multisample.SampleCoverageInvert = GL_FALSE;
62 }
63