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I have an app which uses osg::Camera to render to a shadow map. This
works fine until the I try to run it old hardware that does not support
frame buffer objects and the render target falls back to a one which
causes a seperate GraphicsContext to be set up. This means that the
following piece of code in RenderStage::draw fails because
callingContext is not a valid pointer. if (_graphicsContext.valid() && _graphicsContext != callingContext) { // show we release the context so that others can use it?? will do so right // now as an experiment. callingContext->releaseContext(); !!! Crashes here This is because _graphicsContext is being set to the context created in the runCameraSetup but callingContext is set to _renderInfo.getState()->getGraphicsContext() which has not been set up by osgUtil::SceneView. Do I need to fix this by putting a valid GraphicsConext in the Sceneview RenderInfo. If so how should I set that up (I have never bothered before). Or should I just modify the code in RenderStage::draw like this.. if (_graphicsContext.valid() && callingContext.valid() &&_graphicsContext != callingContext) Comments and ideas welcome. Thanks Roger |
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