Hi Carlos, This seems to be a bit of theme with me catching up with posts... OSG/OpenCL integration.
Creating OpenGL objects requires a valid graphics context, so move your set up code to a draw callback, drawable subclass or a realize operation. Robet. On 5 November 2012 10:47, Carlos Reig <[email protected]> wrote: > Hi, > > I want to initializatze OpenCL using the OSG context (in Windows) in order > to manipulate the OSG VBOs directly in the GPU. > > For that, I need the OpenGL current context and the device context. When I > had the code wrote directly in OpenGL I used the functions > wglGetCurrentContext() and wglGetCurrentDC() for get it, but now I would to > use the OSG api. > > In this moment, I have a code that gets the opengl current context and the > device context in the viewer realize method. But it doesn't work. > > For use Viewer::realize I have to create a child class of > GraphicsOperation and get all the parameters that I need. > > > Code: > > class WindowsContextInfo : public osg::GraphicsOperation > public: > > WindowsContextInfo(): > osg::GraphicsOperation("WindowsContextInfo", false) {} > > virtual void operator() (osg::GraphicsContext* gc) { > osgViewer::GraphicsHandleWin32* windowsGraphicContext = > dynamic_cast<osgViewer::GraphicsHandleWin32*> (gc); > hdc = windowsGraphicContext->getHDC(); > wglContext = windowsGraphicContext->getWGLContext(); > } > > HDC hdc; > HGLRC wglContext; > }; > > > > > In the main code, before doing viewer.realize() I attach the > GraphicOperation to the viewer: > > > Code: > > wci = new WindowsContextInfo; > viewer.setRealizeOperation(wci.get()); > viewer.realize(); > > > > > And, when I'm initializating OpenCL, I put the received parameters: > > > Code: > > cl_context_properties props[] = { > CL_CONTEXT_PLATFORM, > (cl_context_properties) clPlatform, > CL_GL_CONTEXT_KHR, > (cl_context_properties) wci.wglContext, > CL_WGL_HDC_KHR, > (cl_context_properties) wci.hdc, > 0 > }; > > > > > Anyone knows why I get an OpenCL context creation error? I will be > grateful for any track. > > Thank you! > > Cheers, > Carlos > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=50977#50977 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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