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/*
* Mesa 3-D graphics library
* Version: 7.1
*
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "main/glheader.h"
#include "main/context.h"
#include "main/macros.h"
#include "main/multisample.h"
#include "main/mtypes.h"
#include "main/fbobject.h"
/**
* Called via glSampleCoverageARB
*/
void GLAPIENTRY
_mesa_SampleCoverage(GLclampf value, GLboolean invert)
{
GET_CURRENT_CONTEXT(ctx);
FLUSH_VERTICES(ctx, 0);
ctx->Multisample.SampleCoverageValue = (GLfloat) CLAMP(value, 0.0, 1.0);
ctx->Multisample.SampleCoverageInvert = invert;
ctx->NewState |= _NEW_MULTISAMPLE;
}
/**
* Initialize the context's multisample state.
* \param ctx the GL context.
*/
void
_mesa_init_multisample(struct gl_context *ctx)
{
ctx->Multisample.Enabled = GL_TRUE;
ctx->Multisample.SampleAlphaToCoverage = GL_FALSE;
ctx->Multisample.SampleAlphaToOne = GL_FALSE;
ctx->Multisample.SampleCoverage = GL_FALSE;
ctx->Multisample.SampleCoverageValue = 1.0;
ctx->Multisample.SampleCoverageInvert = GL_FALSE;
/* ARB_texture_multisample / GL3.2 additions */
ctx->Multisample.SampleMask = GL_FALSE;
ctx->Multisample.SampleMaskValue = ~(GLbitfield)0;
}
void GLAPIENTRY
_mesa_GetMultisamplefv(GLenum pname, GLuint index, GLfloat * val)
{
GET_CURRENT_CONTEXT(ctx);
switch (pname) {
case GL_SAMPLE_POSITION: {
if (index >= ctx->DrawBuffer->Visual.samples) {
_mesa_error( ctx, GL_INVALID_VALUE, "glGetMultisamplefv(index)" );
return;
}
ctx->Driver.GetSamplePosition(ctx, ctx->DrawBuffer, index, val);
/* winsys FBOs are upside down */
if (_mesa_is_winsys_fbo(ctx->DrawBuffer))
val[1] = 1 - val[1];
return;
}
default:
_mesa_error( ctx, GL_INVALID_ENUM, "glGetMultisamplefv(pname)" );
return;
}
}
void GLAPIENTRY
_mesa_SampleMaski(GLuint index, GLbitfield mask)
{
GET_CURRENT_CONTEXT(ctx);
if (!ctx->Extensions.ARB_texture_multisample) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glSampleMaski");
return;
}
if (index != 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "glSampleMaski(index)");
return;
}
FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
ctx->Multisample.SampleMaskValue = mask;
}
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