Hi, On 20 January 2015 at 21:49, Dave Airlie <airlied@xxxxxxxxx> wrote: > On 19 January 2015 at 21:00, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote: >> In order to suport GLX_EXT_buffer_age in DRI2, we need to pass back the >> last swap buffer count that the back buffer was defined for. For >> simplicity, we can reuse an existing field in the DRI2GetBuffers reply >> that is not used by current drivers, the flags. Since we change the >> interpretation of this flag, we also declare the semantic change with a >> DRI2 parameter and depend upon the DDX to enable the change >> responsibility (which is just a matter of reviewing whether the flags >> field has ever been used for a non-zero value). > > This is just missing the why do we need to add this to DRI2 when we > have DRI3/Present that should be solving it. > > Doesn't dri3 already do this? DRI3/Present still seem to be pretty unstable and break a bunch of stuff, and buffer_age is definitely a useful optimisation for non-TBDR platforms, so I don't see why not. Cheers, Daniel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
