[Pixman] fast-scale branch performance improvements

[Alexander Larsson]

On Thu, 2010-03-11 at 14:41 +0100, Alexander Larsson wrote:

> This clearly is a significant win, and I'd like to get this branch (or
> something based on it) into 0.18.0 to avoid performance regressions in
> spice.
> 
> [1] http://cgit.freedesktop.org/~siamashka/pixman/log/?h=fast-scaling

I took this as a base and created a new branch that does fast scaling,
achieving similar performance, and passing scaling-test.

It is based on the new flags system (adding two flags) and uses a single
macroized function which generates all the different instances.

-- 
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 Alexander Larsson                                            Red Hat, Inc 
       alexl at redhat.com            alexander.larsson at gmail.com 
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