[Pixman] fast-scale branch performance improvements
alexl at redhat.com
Mon Mar 15 13:51:49 PDT 2010
On Mon, 2010-03-15 at 03:25 +0200, Siarhei Siamashka wrote:
> But before it gets committed, some problems with potential fixed point
> overflows when dealing with large images need to be addressed. I have
> made a test program which can expose some of these problems:
I pushed a new version of my branch, rebased on:
on (as before):
This has a new flag FAST_PATH_16BIT_SAFE which handles this problem (and
it runs your test successfully.
I also rebased
> And for the case of scaling without repeat, function
> also needs to be verified with the regards to how it behaves in corner
> cases and extreme image size ranges.
I have not done this, but there is some level of limitation on size
since the FAST_PATH_SAMPLES_COVERS_CLIP flag requires the src region to
fit in 16 bits.
Alexander Larsson Red Hat, Inc
alexl at redhat.com alexander.larsson at gmail.com
He's an underprivileged albino astronaut from the Mississippi delta. She's a
cold-hearted thirtysomething stripper in the wrong place at the wrong time.
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