Proposal for per-CRTC pixmaps in RandR

Keith Packard keithp at
Fri Mar 12 16:47:37 PST 2010

On Fri, 12 Mar 2010 15:22:07 -0800, Aaron Plattner <aplattner at> wrote:

> Could we achieve this by adding a new redirection type,
> CompositeRedirectManualForScanout or something?

The window thing is purely a hack for GL, let's not get sidetracked into
thinking that it's more than that. The idea here is to expose what the
hardware does and let client land sort it out. We've already got two
important use cases which can use the proposed functionality as-is:

 1) Compositing-manager based rotation
 2) working around scanout/rendering limits

In particular, one point of this exercise is to avoid the whole issue of
shatter and its multiple backing-pixmap adventure.

We can add support for overlays (and misc) in a separate proposal once
we figure out if this stuff does what we want.

keith.packard at
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
URL: <>

More information about the xorg-devel mailing list