Enhancements for Render composite request

[Michel Dänzer]

On Tue, 2009-08-25 at 10:34 -0700, Keith Packard wrote: 
> The render composite request has a couple of glaring failures:
> 
>  1) Only one rectangle per request. Apps generate a lot of protocol,
>     the server spends a lot of time decoding requests and the driver
>     has to merge requests back together to hand more than one polygon
>     to the hardware. It's interesting that exa (and hence uxa by
>     derivation) have a poly-rectangle composite operation in their
>     driver interface.

This seems like a no-brainer.

> 2) No vblank synchronization. Anyone wanting to double buffer 2D apps
>     has no way of avoiding tearing. I'd like this inside the X server
>     to make updates under a RandR transform sync to vblank.

But RENDER is the wrong place for this.


-- 
Earthling Michel Dänzer           |                http://www.vmware.com
Libre software enthusiast         |          Debian, X and DRI developer