[Poppler-bugs] [Bug 33364] Complex patterns in PDF displayed as white area, high CPU usage and crash (evince w/ cairo backend only)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=33364

Jason Crain <jason at aquaticape.us> changed:

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--- Comment #8 from Jason Crain <jason at aquaticape.us> ---
Created attachment 103788
  --> https://bugs.freedesktop.org/attachment.cgi?id=103788&action=edit
Use matrix to determine pattern size

> - n3580.pdf: I get differences in a lot of pages, but looks like the
>   same thing in all of them. First ones is page 3. It renders the
>   patterns differently, not sure if it's better or worse, TBH. I would
>   not consider this a regression in any case.
> - folleto_attached.pdf: The brick pattern looks a bit worse I would
>   say, but the diff is too small to be sure.

The difference I see is that the diagonal lines in n3580.pdf and brick pattern
in folleto_attached.pdf are drawn at a higher resolution.  You can see it
through pdftocairo at 300 ppi.

> - redp4150.pdf: Pages 1 and 6, some lines are blurry.

Looks like I need to save/restore the value of adjusted_stroke_width while
drawing the pattern.  It gets clobbered when the pattern sets the line width.

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