Hi, Martin If you use _sumImg->allocateImage(1, 1, 1, GL_RGBA, GL_FLOAT); you will get 4 channel * float 32 bit per channel.
If you want GL_LUMINANCE16 you should use GL_UNSIGNED_SHORT, and you may need to attach proper rendertarget attachment to camera with same pixel format Cheers, Sergey. 12.08.2011, 11:54, ""Martin Großer"" <[email protected]>: > Hello Guys, > > I am a little bit dissatisfied. I want to render into an Image. I need the > pixel data on the cpu memory. That is the reason why I don't use a texture as > target. Anyway I need a higher precision than 8 bit. So I tried to render > into an 16 Bit luminance image. Then I got an OpenGL error: > > Warning: detected OpenGL error 'invalid enumerant' after RenderBin::draw(,) > > I tried other internal formats (i.e. GL_RGBA16F_ARB and GL_RGBA32F_ARB), but > I got the same message. > > Here is partial code from me: > > // init image > _sumImg = new ::osg::Image; > _sumImg->allocateImage(1, 1, 1, GL_LUMINANCE16, GL_FLOAT); > > //... > > // init pre render camera > _preCam = new ::osg::Camera; > _preCam->setViewport(0,0,1,1); > _preCam->setProjectionMatrixAsOrtho2D(0,0.1,0,0.1); > _preCam->setClearColor(::osg::Vec4(0,0,0,1)); > _preCam->setReferenceFrame(::osg::Transform::ABSOLUTE_RF); > _preCam->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); > _preCam->setRenderTargetImplementation(::osg::Camera::FRAME_BUFFER_OBJECT); > _preCam->attach(::osg::Camera::COLOR_BUFFER0, _sumImg); > _preCam->setRenderOrder(::osg::Camera::PRE_RENDER); > > // get the pixel color at location (0,0) > ::osg::Vec4 c = _sumImg->getColor(0,0); > > Thanks > > Martin > > -- > NEU: FreePhone - 0ct/min Handyspartarif mit Geld-zurück-Garantie! > Jetzt informieren: http://www.gmx.net/de/go/freephone > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
