728b8c9301
allow customization of what format/data type to read such as reading from the depth buffer etc.
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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 <osgUtil/RenderToTextureStage>
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using namespace osg;
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using namespace osgUtil;
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// register a RenderToTextureStage prototype with the RenderBin prototype list.
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//RegisterRenderBinProxy<RenderToTextureStage> s_registerRenderToTextureStageProxy;
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RenderToTextureStage::RenderToTextureStage()
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{
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_imageReadPixelFormat = GL_RGBA;
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_imageReadPixelDataType = GL_UNSIGNED_BYTE;
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}
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RenderToTextureStage::~RenderToTextureStage()
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{
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}
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void RenderToTextureStage::reset()
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{
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RenderStage::reset();
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}
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void RenderToTextureStage::draw(osg::State& state,RenderLeaf*& previous)
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{
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if (_stageDrawnThisFrame) return;
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//cout << "begining RTTS draw "<<this<< " "<<_viewport->x()<<","<< _viewport->y()<<","<< _viewport->width()<<","<< _viewport->height()<<std::endl;
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RenderStage::draw(state,previous);
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// now copy the rendered image to attached texture.
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if (_texture.valid())
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{
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//cout << " reading "<<this<< " "<<_viewport->x()<<","<< _viewport->y()<<","<< _viewport->width()<<","<< _viewport->height()<<std::endl;
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_texture->copyTexImage2D(state,_viewport->x(),_viewport->y(),_viewport->width(),_viewport->height());
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}
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if (_image.valid())
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_image->readPixels(_viewport->x(),_viewport->y(),_viewport->width(),_viewport->height(),_imageReadPixelFormat,_imageReadPixelDataType);
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}
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