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 #include "main/fbobject.h"
  32
  33
  34 /**
  35  * Called via glSampleCoverageARB
  36  */
  37 void GLAPIENTRY
  38 _mesa_SampleCoverage(GLclampf value, GLboolean invert)
  39 {
  40    GET_CURRENT_CONTEXT(ctx);
  41
  42    FLUSH_VERTICES(ctx, 0);
  43
  44    ctx->Multisample.SampleCoverageValue = (GLfloat) CLAMP(value, 0.0, 1.0);
  45    ctx->Multisample.SampleCoverageInvert = invert;
  46    ctx->NewState |= _NEW_MULTISAMPLE;
  47 }
  48
  49
  50 /**
  51  * Initialize the context's multisample state.
  52  * \param ctx  the GL context.
  53  */
  54 void
  55 _mesa_init_multisample(struct gl_context *ctx)
  56 {
  57    ctx->Multisample.Enabled = GL_TRUE;
  58    ctx->Multisample.SampleAlphaToCoverage = GL_FALSE;
  59    ctx->Multisample.SampleAlphaToOne = GL_FALSE;
  60    ctx->Multisample.SampleCoverage = GL_FALSE;
  61    ctx->Multisample.SampleCoverageValue = 1.0;
  62    ctx->Multisample.SampleCoverageInvert = GL_FALSE;
  63 }
  64
  65
  66 void GLAPIENTRY
  67 _mesa_GetMultisamplefv(GLenum pname, GLuint index, GLfloat * val)
  68 {
  69    GET_CURRENT_CONTEXT(ctx);
  70
  71    switch (pname) {
  72    case GL_SAMPLE_POSITION: {
  73       if (index >= ctx->DrawBuffer->Visual.samples) {
  74          _mesa_error( ctx, GL_INVALID_VALUE, "glGetMultisamplefv(index)" );
  75          return;
  76       }
  77
  78       ctx->Driver.GetSamplePosition(ctx, ctx->DrawBuffer, index, val);
  79
  80       /* winsys FBOs are upside down */
  81       if (_mesa_is_winsys_fbo(ctx->DrawBuffer))
  82          val[1] = 1 - val[1];
  83
  84       return;
  85    }
  86
  87    default:
  88       _mesa_error( ctx, GL_INVALID_ENUM, "glGetMultisamplefv(pname)" );
  89       return;
  90    }
  91 }
  92
  93 void GLAPIENTRY
  94 _mesa_SampleMaski(GLuint index, GLbitfield mask)
  95 {
  96    assert(!"Not implemented");
  97    // TODO: make this work
  98 }