[cairo] Dithering

[Keith Packard]

On Mon, 2008-04-07 at 17:36 -0400, Behdad Esfahbod wrote:

> When doing such a thing, it would make a lot of sense to take advantage
> of cairo_surface_flush().  But then we cannot assume that people are
> even calling that function at all, let alone correctly.  Same about
> cairo_surface_mark_dirty().  So as we discussed on IRC the other day, we
> need some new API, say, cairo_surface_freeze/thaw() or begin/end(), and
> do all the optimizations only if frozen.  Then making Gtk+ and firefox
> use it correctly is not that hard.

That sounds ideal. We'd just stick that call in the existing Gtk+ double
buffering bits and it should all 'just work'.

-- 
keith.packard at intel.com
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