[cairo-bugs] [Bug 22441] Unexpected shift with push_group and pop_group

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat Jul 4 04:08:56 PDT 2009


--- Comment #2 from Chris Wilson <chris at chris-wilson.co.uk>  2009-07-04 04:08:55 PST ---
Just an update: the error is a non-trivial rounding of surface sizes when
mixing the device-transform and cairo-to-pdf matrices. My thoughts towards a
solution lie both along improving the internal interfaces to communicate
non-integer extents (though, those extents tend only to be related to
rasterisation/pixels anyway...) and converting pdf to setup its
device-transform more appropriately (which doesn't immediately address this
issue, but might be a step towards a fix).

I've added cairo/test/group-unaligned.c to capture this bug. Thanks.

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