a1bda0dab8
Note, this required adding a unsigned int context ID to the osg::isGLUExtensionSupported(,) and osg::isGLExtensionSupported(,) functions. This may require reimplementation of end user code to accomodate the new calling convention.
110 lines
3.4 KiB
C++
110 lines
3.4 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield
|
|
*
|
|
* This library is open source and may be redistributed and/or modified under
|
|
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
|
|
* (at your option) any later version. The full license is in LICENSE file
|
|
* included with this distribution, and on the openscenegraph.org website.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* OpenSceneGraph Public License for more details.
|
|
*/
|
|
#include <osg/GLExtensions>
|
|
#include <osg/Multisample>
|
|
#include <osg/State>
|
|
#include <osg/Notify>
|
|
#include <osg/buffered_value>
|
|
|
|
using namespace osg;
|
|
|
|
|
|
Multisample::Multisample() : _mode(DONT_CARE)
|
|
{
|
|
_coverage = 1;
|
|
_invert = false;
|
|
}
|
|
|
|
Multisample::~Multisample()
|
|
{
|
|
}
|
|
|
|
void Multisample::apply(State& state) const
|
|
{
|
|
// get the contextID (user defined ID of 0 upwards) for the
|
|
// current OpenGL context.
|
|
const unsigned int contextID = state.getContextID();
|
|
|
|
const Extensions* extensions = getExtensions(contextID,true);
|
|
|
|
if (!extensions->isMultisampleSupported())
|
|
{
|
|
notify(WARN)<<"Warning: Multisample::apply(..) failed, Multisample is not support by OpenGL driver."<<std::endl;
|
|
return;
|
|
}
|
|
|
|
if(extensions->isMultisampleFilterHintSupported())
|
|
glHint(GL_MULTISAMPLE_FILTER_HINT_NV, _mode);
|
|
extensions->glSampleCoverage(_coverage, _invert);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
typedef buffered_value< ref_ptr<Multisample::Extensions> > BufferedExtensions;
|
|
static BufferedExtensions s_extensions;
|
|
|
|
Multisample::Extensions* Multisample::getExtensions(unsigned int contextID,bool createIfNotInitalized)
|
|
{
|
|
if (!s_extensions[contextID] && createIfNotInitalized) s_extensions[contextID] = new Extensions(contextID);
|
|
return s_extensions[contextID].get();
|
|
}
|
|
|
|
void Multisample::setExtensions(unsigned int contextID,Extensions* extensions)
|
|
{
|
|
s_extensions[contextID] = extensions;
|
|
}
|
|
|
|
|
|
Multisample::Extensions::Extensions(unsigned int contextID)
|
|
{
|
|
setupGLExtenions(contextID);
|
|
}
|
|
|
|
Multisample::Extensions::Extensions(const Extensions& rhs):
|
|
Referenced()
|
|
{
|
|
_isMultisampleSupported = rhs._isMultisampleSupported;
|
|
_isMultisampleFilterHintSupported = rhs._isMultisampleFilterHintSupported;
|
|
}
|
|
|
|
void Multisample::Extensions::lowestCommonDenominator(const Extensions& rhs)
|
|
{
|
|
if (!rhs._isMultisampleSupported) _isMultisampleSupported = false;
|
|
if (!rhs._isMultisampleFilterHintSupported) _isMultisampleFilterHintSupported = false;
|
|
if (!rhs._glSampleCoverage) _glSampleCoverage = 0;
|
|
}
|
|
|
|
void Multisample::Extensions::setupGLExtenions(unsigned int contextID)
|
|
{
|
|
_isMultisampleSupported = isGLExtensionSupported(contextID,"GL_ARB_multisample");
|
|
_isMultisampleFilterHintSupported = isGLExtensionSupported(contextID,"GL_NV_multisample_filter_hint");
|
|
|
|
_glSampleCoverage = getGLExtensionFuncPtr("glSampleCoverageARB");
|
|
}
|
|
|
|
void Multisample::Extensions::glSampleCoverage(GLclampf value, GLboolean invert) const
|
|
{
|
|
if (_glSampleCoverage)
|
|
{
|
|
typedef void (APIENTRY * GLSampleCoverageProc) (GLclampf value, GLboolean invert);
|
|
((GLSampleCoverageProc)_glSampleCoverage)(value, invert);
|
|
}
|
|
else
|
|
{
|
|
notify(WARN)<<"Error: glSampleCoverage not supported by OpenGL driver"<<std::endl;
|
|
}
|
|
}
|
|
|