dll/opengl/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 #include <precomp.h>
  26
  27 /**
  28  * Called via glSampleCoverageARB
  29  */
  30 void GLAPIENTRY
  31 _mesa_SampleCoverageARB(GLclampf value, GLboolean invert)
  32 {
  33    GET_CURRENT_CONTEXT(ctx);
  34
  35    ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH( ctx );
  36
  37    ctx->Multisample.SampleCoverageValue = (GLfloat) CLAMP(value, 0.0, 1.0);
  38    ctx->Multisample.SampleCoverageInvert = invert;
  39    ctx->NewState |= _NEW_MULTISAMPLE;
  40 }
  41
  42
  43 /**
  44  * Initialize the context's multisample state.
  45  * \param ctx  the GL context.
  46  */
  47 void
  48 _mesa_init_multisample(struct gl_context *ctx)
  49 {
  50    ctx->Multisample.Enabled = GL_TRUE;
  51    ctx->Multisample.SampleAlphaToCoverage = GL_FALSE;
  52    ctx->Multisample.SampleAlphaToOne = GL_FALSE;
  53    ctx->Multisample.SampleCoverage = GL_FALSE;
  54    ctx->Multisample.SampleCoverageValue = 1.0;
  55    ctx->Multisample.SampleCoverageInvert = GL_FALSE;
  56 }