[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

--- Comment #5 from Jason Crain <jason at aquaticape.us> ---
Created attachment 99401
  --> https://bugs.freedesktop.org/attachment.cgi?id=99401&action=edit
Use matrix to determine pattern size

I don't see a crash, but evince does show just a blank page.  There might be a
bug in cairo or pixman because it doesn't seem to like the tiling pattern
matrix.  It doesn't draw anything if the matrix offset / scaling > 32768.

It should still be fixed in poppler though, because it doesn't make sense to
create a 9720x9720 pattern to fill a 750x500 area.  Attached patch calculates
the dimensions of the pattern after transformation and creates a pattern of the
appropriate size.

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