reactos/dll/opengl/mesa/src/mesa/main/multisample.c

   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
  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
  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 }