[Poppler-bugs] [Bug 19760] Horizontal lines appear on blue background on pdf

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=19760

--- Comment #4 from Adrian Johnson <ajohnson at redneon.com> 2012-02-26 03:21:52 PST ---
Created attachment 57654
  --> https://bugs.freedesktop.org/attachment.cgi?id=57654
align fills

Here's an experimental patch for the cairo backend. It doesn't completely solve
the problem but it does eliminate the seams in some cases.

Some test cases I tried it with:
https://bugs.launchpad.net/ubuntu/+source/poppler/+bug/348679/+attachment/510918/+files/test.pdf
Eliminates the seams sometimes depending on the resolution rendered at.


https://bugs.launchpad.net/ubuntu/+source/poppler/+bug/318130/+attachment/441616/+files/seminar1.pdf
Seems to eliminate the seams at all resolutions I tested.


https://bugs.launchpad.net/ubuntu/+source/poppler/+bug/387016/+attachment/606341/+files/Evince%20incorrect%20rendering.zip
Eliminates the seams for all resolutions I tested except 150ppi where the one
seam is worse. This is because the the coordinates of the adjacent fill where
the line is worse are not identical (0.1 difference vertically).

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