Hi,
I'm playing with OSG activeX example and trying to make screenshot of current
scene, but I get black screenshot.
the Viewer initiation is the following:
Code:
_traits = new osg::GraphicsContext::Traits;
osg::ref_ptr<osg::Referenced> windata = new
osgViewer::GraphicsWindowWin32::WindowData( GetSafeHwnd() );
_traits->x = 0;
_traits->y = 0;
_traits->width = rect.right - rect.left;
_traits->height = rect.bottom - rect.top;
_traits->windowDecoration = false;
_traits->doubleBuffer = true;
_traits->sharedContext = 0;
_traits->setInheritedWindowPixelFormat = true;
_traits->inheritedWindowData = windata;
_gc = osg::GraphicsContext::createGraphicsContext( _traits.get() );
_gc->setClearColor( osg::Vec4f(0.2f, 0.2f, 0.6f, 1.0f) );
_gc->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
// Create camera
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(_gc);
camera->setViewport( new osg::Viewport(_traits->x, _traits->y,
_traits->width, _traits->height) );
camera->setProjectionMatrixAsPerspective( 30.0f,
(double)_traits->width/(double)_traits->height, 1.0f, 10000.0f );
camera->setClearMask( GL_DEPTH_BUFFER_BIT );
// Create viewer
_viewer = new osgViewer::Viewer;
_viewer->setThreadingModel( osgViewer::Viewer::SingleThreaded );
_viewer->setCamera( camera.get() );
_viewer->setCameraManipulator( new osgGA::TrackballManipulator );
The part of the code which grabs screenshot is the following:
Code:
osgViewer::ScreenCaptureHandler* scrn = new
osgViewer::ScreenCaptureHandler();
osgViewer::ScreenCaptureHandler::WriteToFile* captureOper = new
osgViewer::ScreenCaptureHandler::WriteToFile(tmpStr.m_szBuffer, "png");
scrn->setCaptureOperation(captureOper);
scrn->captureNextFrame(*_viewer);
_viewer->frame();
I think I need to take screenshot from GraphicContext instead of viewer, but I
have no idea how to do it.
Can you please help?
Thank you!
Cheers,
Danny
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=22850#22850
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