Hi Robert,
Robert Osfield wrote:
Hi J.P.
On Tue, Dec 8, 2009 at 1:31 PM, J.P. Delport <[email protected]> wrote:
just one comment/question... Yesterday I was experimenting with PBO image
readback from FBO RTT camera's generated textures. It is possible to do this
in the camera callback by binding the texture one wants to read from
manually and doing glGetTextImage, but I did not find a way to use
glReadPixels with a PBO, because in the camera callback the FBO is already
unbound and glReadBuffer is not set (all this is handled in RenderStage).
I'm not sure how to do this all manually in the callback. Is it possible?
The osgscreencapture and osgViewer::ScreenCaptureHandler both use
PBO's for reading imagery back, via... Camera callback ;-)
yes, but they are reading from either the frame buffer or a pbuffer, not
from an FBO RTT camera.
jp
Robert.
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