[cairo-bugs] [Bug 43397] EXTEND_NONE is used instead of EXTEND_PAD when src sample area is entirely within the surface

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Apr 5 06:39:53 PDT 2012


--- Comment #38 from Siarhei Siamashka <siarhei.siamashka at gmail.com> 2012-04-05 06:39:53 PDT ---
It is also difficult to SIMD optimize REPEAT_NONE in pixman (the backend for
Cairo’s software rasteriser) in the cases when REPEAT_NONE and REPEAT_PAD are
not equivalent. Checking whether src sample area is entirely within the surface
(this is also done in pixman) is not very effective when BILINEAR scaling is
used, because sampling a bit of pixels outside the source image is rather
common. IMHO it makes sense to advise against using RepeatNone whenever it is

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