134 lines
4.9 KiB
C++
134 lines
4.9 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 <osgViewer/config/AcrossAllScreens>
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#include <osgViewer/config/SingleScreen>
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#include <osgViewer/Renderer>
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#include <osgViewer/View>
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#include <osgViewer/GraphicsWindow>
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#include <osg/io_utils>
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using namespace osgViewer;
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void AcrossAllScreens::configure(osgViewer::View& view) const
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{
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osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
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if (!wsi)
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{
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OSG_NOTICE<<"AcrossAllScreens::configure() : Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
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return;
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}
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osg::DisplaySettings* ds = getActiveDisplaySetting(view);
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double fovy, aspectRatio, zNear, zFar;
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view.getCamera()->getProjectionMatrixAsPerspective(fovy, aspectRatio, zNear, zFar);
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osg::GraphicsContext::ScreenIdentifier si;
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si.readDISPLAY();
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// displayNum has not been set so reset it to 0.
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if (si.displayNum<0) si.displayNum = 0;
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unsigned int numScreens = wsi->getNumScreens(si);
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if (numScreens==1)
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{
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osg::ref_ptr<SingleScreen> ss = new SingleScreen(0);
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ss->configure(view);
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}
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else
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{
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double translate_x = 0.0;
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for(unsigned int i=0; i<numScreens; ++i)
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{
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si.screenNum = i;
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unsigned int width, height;
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wsi->getScreenResolution(si, width, height);
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translate_x += double(width) / (double(height) * aspectRatio);
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}
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bool stereoSplitScreens = numScreens==2 &&
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ds->getStereoMode()==osg::DisplaySettings::HORIZONTAL_SPLIT &&
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ds->getStereo();
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for(unsigned int i=0; i<numScreens; ++i)
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{
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si.screenNum = i;
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unsigned int width, height;
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wsi->getScreenResolution(si, width, height);
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osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits(ds);
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traits->hostName = si.hostName;
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traits->displayNum = si.displayNum;
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traits->screenNum = si.screenNum;
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traits->screenNum = i;
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traits->x = 0;
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traits->y = 0;
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traits->width = width;
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traits->height = height;
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traits->windowDecoration = false;
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traits->doubleBuffer = true;
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traits->sharedContext = 0;
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osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
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osg::ref_ptr<osg::Camera> camera = new osg::Camera;
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camera->setGraphicsContext(gc.get());
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osgViewer::GraphicsWindow* gw = dynamic_cast<osgViewer::GraphicsWindow*>(gc.get());
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if (gw)
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{
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OSG_INFO<<" GraphicsWindow has been created successfully."<<gw<<std::endl;
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gw->getEventQueue()->getCurrentEventState()->setWindowRectangle(traits->x, traits->y, traits->width, traits->height );
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}
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else
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{
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OSG_NOTICE<<" GraphicsWindow has not been created successfully."<<std::endl;
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}
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camera->setViewport(new osg::Viewport(0, 0, traits->width, traits->height));
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GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
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camera->setDrawBuffer(buffer);
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camera->setReadBuffer(buffer);
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if (stereoSplitScreens)
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{
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unsigned int leftCameraNum = (ds->getSplitStereoHorizontalEyeMapping()==osg::DisplaySettings::LEFT_EYE_LEFT_VIEWPORT) ? 0 : 1;
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osg::ref_ptr<osg::DisplaySettings> ds_local = new osg::DisplaySettings(*ds);
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ds_local->setStereoMode(leftCameraNum==i ? osg::DisplaySettings::LEFT_EYE : osg::DisplaySettings::RIGHT_EYE);
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camera->setDisplaySettings(ds_local.get());
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view.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd() );
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}
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else
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{
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double newAspectRatio = double(traits->width) / double(traits->height);
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double aspectRatioChange = newAspectRatio / aspectRatio;
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view.addSlave(camera.get(), osg::Matrixd::translate( translate_x - aspectRatioChange, 0.0, 0.0) * osg::Matrix::scale(1.0/aspectRatioChange,1.0,1.0), osg::Matrixd() );
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translate_x -= aspectRatioChange * 2.0;
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}
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}
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}
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view.assignSceneDataToCameras();
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}
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