Projective transforms in RandR

Keith Packard keithp at
Mon Jul 16 00:06:57 PDT 2007

On Mon, 2007-07-16 at 00:06 -0500, Pat Kane wrote:
> Keith,
> I have a device that has a display with non-square pixels, I think it
> was optimized to display text .   Your rotation proposal could help
> make pixmaps look better on the device.  But I am  worried
> about jaggies and expect I will  need to apply a filter before/after
> the transform.   Is that outside the scope of your fix?

The transformation is done using the Render extension which defines
several filters. I'm planning on letting you pick which one to use.

keith.packard at
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