[Okular-devel] [Bug 273654] New: Okular thrashing or displaying blank window trying to render PDFs which are fine in Adobe Reader

[mathew]

https://bugs.kde.org/show_bug.cgi?id=273654

           Summary: Okular thrashing or displaying blank window trying to
                    render PDFs which are fine in Adobe Reader
           Product: okular
           Version: 0.11.2
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: PDF backend
        AssignedTo: okular-devel at kde.org
        ReportedBy: meta at pobox.com


Version:           0.11.2 (using KDE 4.5.5) 
OS:                Linux

I've encountered a PDF which renders really slowly in Okular, but is fine in
Adobe Reader.

http://carto.metro.free.fr/documents/CartoMetroLondon.v2.0.pdf

Reproducible: Always

Steps to Reproduce:
1. Download http://carto.metro.free.fr/documents/CartoMetroLondon.v2.0.pdf
2. Load it into Okular.
3. Hit 'zoom in' a couple of times.
4. Wait... and wait... and wait...

Actual Results:  
Takes about 6 seconds to render when zoomed out to 50%. 18 seconds at 100%. At
200% it appears to give up and render a blank window, and top shows no CPU
activity.

Expected Results:  
In Adobe Reader, the PDF renders in under 2 seconds at any zoom level.

I've seen similar problems in PDFs generated using LuaTeX, but wasn't able to
provide a good sample to file a bug report because they contained information
internal to my employer.

Computer is a Core i7.

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