54 lines
1.6 KiB
C++
54 lines
1.6 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/GLExtensions>
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#include <osg/TexEnv>
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#include <osg/State>
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#include <osg/Notify>
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using namespace osg;
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TexEnv::TexEnv(Mode mode)
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{
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_mode = mode;
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_color.set(0.0f,0.0f,0.0f,0.0f);
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}
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TexEnv::~TexEnv()
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{
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}
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void TexEnv::apply(State& state) const
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{
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#ifdef OSG_GL_FIXED_FUNCTION_AVAILABLE
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if (_mode==ADD)
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{
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static bool isTexEnvAddSupported = isGLExtensionSupported(state.getContextID(),"GL_ARB_texture_env_add");
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if (isTexEnvAddSupported)
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glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, ADD);
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else // fallback on OpenGL default.
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glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, MODULATE);
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}
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else
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{
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glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, _mode);
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if (_mode==TexEnv::BLEND)
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{
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glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, _color.ptr());
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}
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}
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#else
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OSG_NOTICE<<"Warning: TexEnv::apply(State&) - not supported."<<std::endl;
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#endif
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}
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