485709f708
Moved the #defines into new include/osg/GLDefines Converted all GL2Extensions usage to GLExtensions usage git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14593 16af8721-9629-0410-8352-f15c8da7e697
83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 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/BlendEquation>
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#include <osg/GLExtensions>
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#include <osg/State>
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#include <osg/Notify>
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#include <osg/buffered_value>
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using namespace osg;
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BlendEquation::BlendEquation():
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_equationRGB(FUNC_ADD),
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_equationAlpha(FUNC_ADD)
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{
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}
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BlendEquation::BlendEquation(Equation equation):
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_equationRGB(equation),
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_equationAlpha(equation)
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{
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}
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BlendEquation::BlendEquation(Equation equationRGB, Equation equationAlpha):
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_equationRGB(equationRGB),
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_equationAlpha(equationAlpha)
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{
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}
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BlendEquation::~BlendEquation()
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{
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}
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void BlendEquation::apply(State& state) const
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{
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const GLExtensions* extensions = state.get<GLExtensions>();
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if (!extensions->isBlendEquationSupported)
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{
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OSG_WARN<<"Warning: BlendEquation::apply(..) failed, BlendEquation is not support by OpenGL driver."<<std::endl;
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return;
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}
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if((_equationRGB == ALPHA_MIN || _equationRGB == ALPHA_MAX) && !extensions->isSGIXMinMaxSupported)
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{
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OSG_WARN<<"Warning: BlendEquation::apply(..) failed, SGIX_blend_alpha_minmax extension is not supported by OpenGL driver." << std::endl;
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return;
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}
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if(_equationRGB == LOGIC_OP && !extensions->isLogicOpSupported)
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{
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OSG_WARN<<"Warning: BlendEquation::apply(..) failed, EXT_blend_logic_op extension is not supported by OpenGL driver." << std::endl;
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return;
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}
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if (_equationRGB == _equationAlpha)
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{
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extensions->glBlendEquation(static_cast<GLenum>(_equationRGB));
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}
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else
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{
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if (extensions->isBlendEquationSeparateSupported)
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{
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extensions->glBlendEquationSeparate(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, EXT_blend_equation_separate extension is not supported by OpenGL driver." << std::endl;
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return;
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}
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}
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}
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