457d41d385
git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14563 16af8721-9629-0410-8352-f15c8da7e697
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2014 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osg/BlendEquationi>
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#include <osg/GLExtensions>
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#include <osg/State>
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using namespace osg;
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BlendEquationi::BlendEquationi():
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_index(0)
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{
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}
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BlendEquationi::~BlendEquationi()
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{
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}
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void BlendEquationi::apply(State& state) const
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{
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const Extensions* extensions = state.get<Extensions>();
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if (_equationRGB == _equationAlpha)
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{
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if (extensions->glBlendEquationi)
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{
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extensions->glBlendEquationi(static_cast<GLuint>(_index), static_cast<GLenum>(_equationRGB));
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}
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else
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{
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OSG_WARN<<"Warning: BlendEquationi::apply(..) not supported by OpenGL driver." << std::endl;
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}
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}
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else
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{
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if (extensions->glBlendEquationSeparatei)
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{
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extensions->glBlendEquationSeparatei(static_cast<GLuint>(_index), static_cast<GLenum>(_equationRGB), static_cast<GLenum>(_equationAlpha));
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}
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else
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{
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OSG_WARN<<"Warning: BlendEquation::apply(..) failed, glBlendEquationSeparatei not supported by OpenGL driver." << std::endl;
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}
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}
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}
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