81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
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#include <cassert>
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//#include <osgDB/ReadFile>
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#include "RenderToTextureStage.h"
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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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MyRenderToTextureStage::MyRenderToTextureStage()
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{
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_pbuffer = 0L;
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}
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MyRenderToTextureStage::~MyRenderToTextureStage()
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{
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}
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void MyRenderToTextureStage::reset()
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{
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RenderStage::reset();
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}
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void MyRenderToTextureStage::draw(osg::State& state, osgUtil::RenderLeaf*& previous)
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{
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if (_pbuffer && _texture.valid())
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{
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// Create pbuffer texture
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const unsigned int contextID = state.getContextID();
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GLuint& handle = _texture->getTextureObject(contextID);
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if (handle == 0)
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{
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// Create dynamic texture, subload callback required.
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_texture->apply(state);
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}
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HDC hdc = ::wglGetCurrentDC();
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HGLRC hglrc = ::wglGetCurrentContext();
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// Release pbuffer from "render to texture".
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_pbuffer->releaseTexImage();
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// Make the p-buffer's context current.
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_pbuffer->makeCurrent();
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// Render in p-buffer.
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RenderStage::draw(state,previous);
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// restore window's context as current.
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if (!::wglMakeCurrent(hdc, hglrc))
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{
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assert(0);
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}
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if (true /*_isRenderTextureSupported*/)
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{
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// transfer contents of p-buffer to texture
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_pbuffer->bindTexImage(handle);
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}
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else
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{
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// TODO:
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// _pbuffer->copyTexImage(state);
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}
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}
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else
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{
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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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_texture->copyTexImage2D(state,_viewport->x(),_viewport->y(),_viewport->width(),_viewport->height());
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if (_image.valid())
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_image->readPixels(_viewport->x(),_viewport->y(),_viewport->width(),_viewport->height(),GL_RGBA,GL_UNSIGNED_BYTE);
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}
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}
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