ubuntu-x-swat team mailing list archive

[Tom Jaeger <ThJaeger@xxxxxxxxx>]

> First could someone explain exactly what feature in the graphics driver
> people think is wrong.

Many graphics drivers didn't use to accelerate composite operations with
repeat type PAD (and REFLECT) correctly.  This was a year ago; i believe
these issues have long been fixed.

> Could a small test program be written to show the error ?? has maybe
> someone written one already.

There is a very simple test case attached to this very bug report.  Its
source surface is only 2x2 (IIRC), which might not hit an accelerated
path on every driver; there's a test case with a larger source surface
attached to the -ati driver bug report.

> This needs to get solved one way or the other having a fix outside the
> normal distribution is not acceptable. but working around the problem in
> only firefox obviously is not the correct fix.

No, firefox is the correct place to fix this issue.  Firefox asks for
nearest-neighbor interpolation because on unpatched cairo 1.8.6,
bilinear filtering forces a slow client-side fallback to insure correctness.

-- 
FFe: Pixellated Images in Firefox/Opera due to incorrect EXTEND_PAD implementation in several video drivers
https://bugs.launchpad.net/bugs/217908
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