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List:       freedesktop-xorg
Subject:    Re: Xegl lives!
From:       Allen Akin <akin () pobox ! com>
Date:       2005-05-25 18:12:46
Message-ID: 20050525181246.GA23110 () tuolumne ! arden ! org
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On Wed, May 25, 2005 at 12:49:49AM -0400, Jon Smirl wrote:
| Allen, I've always been suspicious that the Cairo imaging model wasn't
| really compatible with the OpenGL one but I lack the background to
| make a true comparison. Are the models really compatible?

I don't know the subtleties of Cairo well enough to give you a good
answer.  Maybe the Glitz folks will chime in.

My impression is that there are no showstoppers, just some semantics
that are awkward to implement on GPUs.  I think most of this is due to
characteristics of the PostScript rendering model, rather than to Cairo.
The compositing semantics might be an exception.

| If we had started with OpenGL and worked backwards to produce a Cairo
| like API, how would it be different? ...

Hard for me to say, because it depends a lot on what the toolkit folks
are interested in doing and how the manpower could be divided between
the graphics and the toolkit implementations.

Allen

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