Around 20 o'clock on Dec 11, Jonathan Walther wrote:

> Alas, the arrow is a png that uses 200 different colors, plus has alpha
> channel information which I'm ignoring for now.

You'll end up using the Render extension sooner or later in any case; the 
alpha channel information can't be used with core X...

> Is XSetClipOrigin() also really slow, or could I get away with using it,
> given that I'm only updating the screen 30-40 times per second?  I have
> yet to dip my toes into the Render extension, so if XSetClipOrigin() is
> "fast enough", then my application need have no fuss nor muss.

XSetClipOrigin is pretty slow, but it might just barely be fast enough for 
this.

Keith Packard        XFree86 Core Team        Compaq Cambridge Research Lab




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