b9ad93ad8d
Use the buffer_age extension when available to recycle backbuffer contents instead of blitting from the back to front buffer when doing clipped redraws. The picking is now done in a pixel that is going to be repaired during the next redraw cycle for non static scences. This should improve performance and avoid tearing. Reviewed-by: Robert Bragg <robert@linux.intel.com> https://bugzilla.gnome.org/show_bug.cgi?id=669122