James Turner
c170f576b6
This is going to become important soon - prep for enabling SIMGEAR_SHARED on Windows.
100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
// Parse osg::BlendFunc from property nodes
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//
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// Copyright (C) 2008 - 2010 Tim Moore timoore33@gmail.com
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// Copyright (C) 2013 Thomas Geymayer <tomgey@gmail.com>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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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 GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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#include <simgear_config.h>
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#include "parseBlendFunc.hxx"
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#include "EffectBuilder.hxx"
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#include <simgear/scene/util/StateAttributeFactory.hxx>
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#include <osg/BlendFunc>
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using osg::BlendFunc;
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namespace simgear
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{
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//----------------------------------------------------------------------------
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extern effect::EffectPropertyMap<BlendFunc::BlendFuncMode> blendFuncModes;
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//----------------------------------------------------------------------------
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bool parseBlendFunc( osg::StateSet* ss,
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const SGPropertyNode* src,
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const SGPropertyNode* dest,
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const SGPropertyNode* src_rgb,
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const SGPropertyNode* dest_rgb,
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const SGPropertyNode* src_alpha,
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const SGPropertyNode* dest_alpha )
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{
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if( !ss )
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return false;
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BlendFunc::BlendFuncMode src_mode = BlendFunc::ONE;
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BlendFunc::BlendFuncMode dest_mode = BlendFunc::ZERO;
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if( src )
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findAttr(blendFuncModes, src, src_mode);
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if( dest )
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findAttr(blendFuncModes, dest, dest_mode);
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if( src && dest
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&& !(src_rgb || src_alpha || dest_rgb || dest_alpha)
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&& src_mode == BlendFunc::SRC_ALPHA
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&& dest_mode == BlendFunc::ONE_MINUS_SRC_ALPHA )
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{
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ss->setAttributeAndModes(
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StateAttributeFactory::instance()->getStandardBlendFunc()
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);
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return true;
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}
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BlendFunc* blend_func = new BlendFunc;
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if( src )
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blend_func->setSource(src_mode);
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if( dest )
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blend_func->setDestination(dest_mode);
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if( src_rgb )
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{
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BlendFunc::BlendFuncMode sourceRGBMode;
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findAttr(blendFuncModes, src_rgb, sourceRGBMode);
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blend_func->setSourceRGB(sourceRGBMode);
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}
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if( dest_rgb)
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{
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BlendFunc::BlendFuncMode destRGBMode;
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findAttr(blendFuncModes, dest_rgb, destRGBMode);
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blend_func->setDestinationRGB(destRGBMode);
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}
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if( src_alpha )
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{
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BlendFunc::BlendFuncMode sourceAlphaMode;
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findAttr(blendFuncModes, src_alpha, sourceAlphaMode);
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blend_func->setSourceAlpha(sourceAlphaMode);
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}
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if( dest_alpha)
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{
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BlendFunc::BlendFuncMode destAlphaMode;
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findAttr(blendFuncModes, dest_alpha, destAlphaMode);
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blend_func->setDestinationAlpha(destAlphaMode);
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}
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ss->setAttributeAndModes(blend_func);
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return true;
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}
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} // namespace simgear
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