[cairo-bugs] [Bug 59635] New: Cairo 1.12.10 causes evince to misrender pages of a PDF file while scrolling down in continuous mode [BISECT]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59635

          Priority: medium
            Bug ID: 59635
          Assignee: chris at chris-wilson.co.uk
           Summary: Cairo 1.12.10 causes evince to misrender pages of a
                    PDF file while scrolling down in continuous mode
                    [BISECT]
        QA Contact: cairo-bugs at cairographics.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: gokcen.eraslan at gmail.com
          Hardware: Other
            Status: NEW
           Version: 1.12.8
         Component: xlib backend
           Product: cairo

Created attachment 73341
  --> https://bugs.freedesktop.org/attachment.cgi?id=73341&action=edit
PDF file to reproduce the bug

While browsing a PDF document, when I scroll to the end of the first page and
see the second page, the first page that I have just pass over suddenly starts
being rendered as the second page. So I begin to see *two of the second pages*.
This is the casae for some of my pdf files, but happens everytime when I try a
problematic PDF file.

To explain the bug better, I have prepared a screencast here[1]. And after my
git bisect, I have understood that guilty commit is:

commit a73e7ff0186176bc82cd3ae1432c054c1fd3aebd
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Sun Jan 6 11:29:27 2013 +0000

    xlib: Simplify source creation by use of map-to-image

    We were open-coding the functionality of map-to-image inside the source
    creation routines. so refactor to actually use map-to-image instead.

    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>


Before this commit, everything works well. By the way I'm using evince
3.6.0-0ubuntu2 and poppler 0.20.4-0ubuntu1.1.

PDF to reproduce the bug, is attached.

Regards (and thank you very much for the Intel SNA implementation).

[1]
http://bugs.launchpad.net/ubuntu/+source/evince/+bug/1101316/+attachment/3487705/+files/evincebug.mkv

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