pixmap resizing was Re: How to disable/limit pixmap cache in X

Eric Anholt eric at anholt.net
Fri Sep 21 11:38:36 PDT 2007

On Fri, 2007-09-21 at 13:08 +0100, Gavin McCullagh wrote:
> It appears that where firefox gets an image for display, embedded in HTML,
> at say 400x300 pixels, it will send the full size image to the X server
> cache, rather than rescaling the image first -- even if the image is
> 1600x1200 or even larger.  Firefox then apparently uses X to do the
> resizing for it.
> My question is, is there a compelling reason for this -- are video cards
> quicker at the resize?

With a modern driver, assuming 0 network transport cost, yes, and it
will only get better over time.

Eric Anholt                             anholt at FreeBSD.org
eric at anholt.net                         eric.anholt at intel.com

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