[cairo] Operator optimization based on source or dest opacity

[Behdad Esfahbod]

On Wed, 2008-02-27 at 00:36 -0500, Antoine Azar wrote:
> 
> I'm also attaching another patch (to be applied first) that cleans up
> further pixman-compose.c by moving all the composition operators to
> their own files, pixman-compose-operators.c/h

This may have a measurable negative impact, as 1) the functions can't be
inlined and 2) they will go through PLT entries now.  Consider moving
them into a .h file and making them static.

-- 
behdad
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