To clarify, there are many cases where there will be an asynchronous
readback to main memory, but likely not in the case of render to
vertex array. ARB_pixel_buffer_object has more information, specifically
- In Issues, #23;
- In Usage Examples, Example 1: Render to vertex array;
On Nov 26, 2007, at 11:44, Jean-Francois Roy wrote:
It depends what and where is the source of the readback, but
generally no it won't since a VBO or a PBO represent memory on the
GPU. I couldn't find a specific reference to this in
ARB_vertex_buffer_object however, so you should make sure. I would
be very surprised if a readback with any bound buffer object would
incur staging through main memory.
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