[cairo] New OpenGL backend merged

[Jonathan Morton]

> Honestly, for Firefox I think we're far more interested in performance
> than really-high-quality antialiasing, so we really want to be able to
> choose that tradeoff. Keeping animation smooth is more important than
> AA.

I would argue the opposite way for Firefox.  In my experience the
overhead associated with text rendering is much more significant than
any fillrate-related issues, and you don't want to give the very large
population of "Web surfers" eyestrain.

> I would even like to be able to vary the quality level dynamically, so
> that for simple or static pages we can use maximum quality, but if an
> animation starts on a complex page then we can dynamically lower the
> quality to maintain the frame rate.

Animations within Firefox for which framerate matters fall into two
major categories: video and Flash.  Both of these have their own
rendering techniques.

-- 
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From: Jonathan Morton
      jonathan.morton at movial.com