2013/6/11 Robert Osfield robert.osfi...@gmail.com
You can use osg::PixelBufferObject to assist with transferring data to and
from the GPU. The
OpenSceneGraph/osgscreencapture example illustrates the use of PBO's
including buffering.
Hmm, strange. The osgscreencapture sample does not use
On 14 June 2013 11:56, Christian Buchner christian.buch...@gmail.com wrote:
Is there any particular reason why it's done this way, instead of relying on
the osg PixelBufferObject?
I don't recall the specific decision when osgscreencapture was
written, but in sometimes for very specific purposes
Hi Christian,
You can use osg::PixelBufferObject to assist with transferring data to
and from the GPU. However, to hide the cost of the wait for rendering
pipeline to flush and the transfer back it's best to double buffer and
read the previous frames result. Without doing the double buffer
On 11 June 2013 13:19, Robert Osfield robert.osfi...@gmail.com wrote:
only passing the minimum amount of data if any back to the GPU.
Meant to say back to the *CPU*.
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Thanks for this information. I think I can tolerate a frame of delay in my
read back.
My frame buffer format is float with four color channels, I hope that does
not cause
additional slow-downs (due to falling out of the fast path in the driver)
Christian
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