[cairo] Concerns about using filters for downscaling

Søren Sandmann sandmann at cs.au.dk
Sat Mar 22 18:30:50 PDT 2014

Owen Taylor <otaylor at redhat.com> writes:

> (Søren pointed out on IRC that the pixman implemention of convolution
> is not SIMD optimized, so their would be future opportunity to improve
> what we can do within the constraints of 5-10x slower.)

Also, the pixman convolution filter is designed to be implemented in a
separable way, but the current code doesn't do that. This optimization
should be another major speedup for filters with wide support such as as


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