[sugar] X fonts, and Cairo fonts

[Alan Kay]

I'm all for Cairo and we plan to use it as much as possible (and 
completely when it does all the things it needs). I'm just pointing 
out that the time domain is not free on this machine.

Cheers,

Alan

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At 07:26 AM 3/14/2007, Marco Pesenti Gritti wrote:
>On Wed, 2007-03-14 at 07:05 -0800, Alan Kay wrote:
> > Hi Marco --
> >
> > Animation of lots of Cairo objects is not "free" on the XO (it is in
> > fact severely limited right now, especially if collision detection is
> > also needed), so we just have to widen the point of view to include
> > larger issues to see what Bert is driving at.
>
>Hi Alan,
>
>what I was pointing out is that, given the architecture we chose to
>adopt for graphics (i.e. Cairo), make stuff resolution independent is
>"free".
>
>If what you are suggesting is that we should not use Cairo because it
>has performance problems than I have two objections:
>
>1 Profiling shows that the main bottleneck is not Cairo itself but the
>888 -> 555 conversion. Cairo does not support 565 but that's fixable if
>we want to.
>2 We need a powerful 2D API, given that the user experience design is
>heavily based on vector graphics. I don't see realistic alternatives to
>Cairo (and I don't think we should be looking for one given 1)
>
>Cheers,
>Marco