316 lines
11 KiB
C++
316 lines
11 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This application is open source and may be redistributed and/or modified
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* freely and without restriction, both in commericial and non commericial applications,
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* as long as this copyright notice is maintained.
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*
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* This application 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.
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*/
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#include <osgDB/ReadFile>
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#include <osgDB/WriteFile>
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#include <osgUtil/Optimizer>
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#include <osg/CoordinateSystemNode>
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#include <osg/Switch>
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#include <osgText/Text>
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#include <osgViewer/Viewer>
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#include <osgViewer/ViewerEventHandlers>
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#include <osgGA/TrackballManipulator>
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#include <osgGA/FlightManipulator>
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#include <osgGA/DriveManipulator>
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#include <osgGA/KeySwitchMatrixManipulator>
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#include <osgGA/StateSetManipulator>
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#include <osgGA/AnimationPathManipulator>
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#include <osgGA/TerrainManipulator>
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#include <iostream>
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#include <sstream>
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class WindowCaptureCallback : public osg::Camera::DrawCallback
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{
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public:
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struct ContextData : public osg::Referenced
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{
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ContextData(osg::GraphicsContext* gc, const std::string& name):
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_gc(gc),
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_fileName(name),
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_pixelFormat(GL_RGB),
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_type(GL_UNSIGNED_BYTE),
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_width(0),
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_height(0),
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_currentImageIndex(0),
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_currentPboIndex(0)
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{
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getSize(gc, _width, _height);
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std::cout<<"Window size "<<_width<<", "<<_height<<std::endl;
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// single buffered image
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_imageBuffer.push_back(new osg::Image);
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// double buffer PBO.
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_pboBuffer.push_back(new osg::PixelBufferObject);
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_pboBuffer.push_back(new osg::PixelBufferObject);
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}
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void getSize(osg::GraphicsContext* gc, int& width, int& height)
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{
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if (gc->getTraits())
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{
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width = gc->getTraits()->width;
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height = gc->getTraits()->height;
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}
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}
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void read()
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{
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std::cout<<"Read to "<<_fileName<<" image "<<_currentImageIndex<<" "<<_currentPboIndex<<std::endl;
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unsigned int nextImageIndex = (_currentImageIndex+1)%_imageBuffer.size();
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unsigned int nextPboIndex = (_currentPboIndex+1)%_pboBuffer.size();
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int width=0, height=0;
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getSize(_gc, width, height);
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if (width!=_width || _height!=height)
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{
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std::cout<<" Window resized "<<width<<", "<<height<<std::endl;
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_width = width;
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_height = height;
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}
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osg::Image* image = _imageBuffer[_currentImageIndex].get();
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image->readPixels(0,0,_width,_height,
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_pixelFormat,_type);
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if (!_fileName.empty())
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{
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osgDB::writeImageFile(*image, _fileName);
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}
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_currentImageIndex = nextImageIndex;
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_currentPboIndex = nextPboIndex;
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}
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typedef std::vector< osg::ref_ptr<osg::Image> > ImageBuffer;
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typedef std::vector< osg::ref_ptr<osg::PixelBufferObject> > PBOBuffer;
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osg::GraphicsContext* _gc;
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std::string _fileName;
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GLenum _pixelFormat;
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GLenum _type;
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int _width;
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int _height;
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unsigned int _currentImageIndex;
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ImageBuffer _imageBuffer;
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unsigned int _currentPboIndex;
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PBOBuffer _pboBuffer;
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};
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WindowCaptureCallback()
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{
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}
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ContextData* createContextData(osg::GraphicsContext* gc) const
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{
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std::stringstream filename;
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filename << "test_"<<_contextDataMap.size()<<".jpg";
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return new ContextData(gc,filename.str());
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}
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ContextData* getContextData(osg::GraphicsContext* gc) const
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex);
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osg::ref_ptr<ContextData>& data = _contextDataMap[gc];
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if (!data) data = createContextData(gc);
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return data.get();
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}
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virtual void operator () (osg::RenderInfo& renderInfo) const
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{
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osg::GraphicsContext* gc = renderInfo.getState()->getGraphicsContext();
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osg::notify(osg::NOTICE)<<"Capture screen image "<<gc<<std::endl;
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osg::ref_ptr<ContextData> cd = getContextData(gc);
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cd->read();
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}
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typedef std::map<osg::GraphicsContext*, osg::ref_ptr<ContextData> > ContextDataMap;
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mutable OpenThreads::Mutex _mutex;
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mutable ContextDataMap _contextDataMap;
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};
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void addCallbackToViewer(osgViewer::ViewerBase& viewer, WindowCaptureCallback* callback)
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{
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osgViewer::ViewerBase::Windows windows;
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viewer.getWindows(windows);
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for(osgViewer::ViewerBase::Windows::iterator itr = windows.begin();
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itr != windows.end();
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++itr)
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{
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osgViewer::GraphicsWindow* window = *itr;
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osg::GraphicsContext::Cameras& cameras = window->getCameras();
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osg::Camera* lastCamera = 0;
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for(osg::GraphicsContext::Cameras::iterator cam_itr = cameras.begin();
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cam_itr != cameras.end();
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++cam_itr)
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{
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if (lastCamera)
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{
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if ((*cam_itr)->getRenderOrder() > (*cam_itr)->getRenderOrder())
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{
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lastCamera = (*cam_itr);
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}
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if ((*cam_itr)->getRenderOrder() == lastCamera->getRenderOrder() &&
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(*cam_itr)->getRenderOrderNum() >= lastCamera->getRenderOrderNum())
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{
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lastCamera = (*cam_itr);
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}
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}
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else
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{
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lastCamera = *cam_itr;
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}
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}
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if (lastCamera)
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{
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osg::notify(osg::NOTICE)<<"Last camera "<<lastCamera<<std::endl;
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lastCamera->setFinalDrawCallback(callback);
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}
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else
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{
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osg::notify(osg::NOTICE)<<"No camera found"<<std::endl;
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}
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}
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}
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int main(int argc, char** argv)
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{
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// use an ArgumentParser object to manage the program arguments.
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osg::ArgumentParser arguments(&argc,argv);
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arguments.getApplicationUsage()->setApplicationName(arguments.getApplicationName());
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arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the standard OpenSceneGraph example which loads and visualises 3d models.");
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arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
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arguments.getApplicationUsage()->addCommandLineOption("--image <filename>","Load an image and render it on a quad");
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arguments.getApplicationUsage()->addCommandLineOption("--dem <filename>","Load an image/DEM and render it on a HeightField");
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osgViewer::Viewer viewer(arguments);
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unsigned int helpType = 0;
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if ((helpType = arguments.readHelpType()))
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{
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arguments.getApplicationUsage()->write(std::cout, helpType);
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return 1;
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}
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// report any errors if they have occurred when parsing the program arguments.
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if (arguments.errors())
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{
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arguments.writeErrorMessages(std::cout);
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return 1;
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}
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if (arguments.argc()<=1)
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{
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arguments.getApplicationUsage()->write(std::cout,osg::ApplicationUsage::COMMAND_LINE_OPTION);
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return 1;
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}
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// set up the camera manipulators.
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{
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osg::ref_ptr<osgGA::KeySwitchMatrixManipulator> keyswitchManipulator = new osgGA::KeySwitchMatrixManipulator;
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keyswitchManipulator->addMatrixManipulator( '1', "Trackball", new osgGA::TrackballManipulator() );
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keyswitchManipulator->addMatrixManipulator( '2', "Flight", new osgGA::FlightManipulator() );
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keyswitchManipulator->addMatrixManipulator( '3', "Drive", new osgGA::DriveManipulator() );
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keyswitchManipulator->addMatrixManipulator( '4', "Terrain", new osgGA::TerrainManipulator() );
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std::string pathfile;
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char keyForAnimationPath = '5';
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while (arguments.read("-p",pathfile))
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{
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osgGA::AnimationPathManipulator* apm = new osgGA::AnimationPathManipulator(pathfile);
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if (apm || !apm->valid())
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{
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unsigned int num = keyswitchManipulator->getNumMatrixManipulators();
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keyswitchManipulator->addMatrixManipulator( keyForAnimationPath, "Path", apm );
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keyswitchManipulator->selectMatrixManipulator(num);
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++keyForAnimationPath;
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}
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}
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viewer.setCameraManipulator( keyswitchManipulator.get() );
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}
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// add the state manipulator
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viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
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// add the thread model handler
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viewer.addEventHandler(new osgViewer::ThreadingHandler);
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// add the window size toggle handler
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viewer.addEventHandler(new osgViewer::WindowSizeHandler);
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// add the stats handler
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viewer.addEventHandler(new osgViewer::StatsHandler);
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// add the help handler
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viewer.addEventHandler(new osgViewer::HelpHandler(arguments.getApplicationUsage()));
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// add the record camera path handler
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viewer.addEventHandler(new osgViewer::RecordCameraPathHandler);
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// add the LOD Scale handler
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viewer.addEventHandler(new osgViewer::LODScaleHandler);
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// load the data
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osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
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if (!loadedModel)
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{
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std::cout << arguments.getApplicationName() <<": No data loaded" << std::endl;
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return 1;
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}
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// any option left unread are converted into errors to write out later.
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arguments.reportRemainingOptionsAsUnrecognized();
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// report any errors if they have occurred when parsing the program arguments.
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if (arguments.errors())
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{
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arguments.writeErrorMessages(std::cout);
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return 1;
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}
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// optimize the scene graph, remove redundant nodes and state etc.
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osgUtil::Optimizer optimizer;
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optimizer.optimize(loadedModel.get());
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viewer.setSceneData( loadedModel.get() );
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viewer.realize();
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addCallbackToViewer(viewer, new WindowCaptureCallback);
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return viewer.run();
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}
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