[Poppler-bugs] [Bug 64855] Rendering unprecise -> holes in large parentheses

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=64855

--- Comment #8 from Patrick Häcker <pat_h at web.de> ---
I created a cropped variant of the PDF file (without the page number), to focus
on the problem at hand ("Cropped problematic PDF").

I checked out the git version of poppler to confirm, that the problem still
exists. As I don't have a viewer capable of handling the most recent poppler
version, I used the "pdftocairo" tool to generate a PNG file from the PDF file
with the following command:
./pdftocairo -r 170 -png hole-crop.pdf ~hole-crop

This lead to the attachment "PNG converted from PDF". To highlight the problem,
I marked the problematic areas with red color and zoomed-in, which can be seen
in "Zoomed PNG file (converted from PDF)".

The problem seems to be more obvious in Okular (but this might be due to the
older poppler version): http://tex.stackexchange.com/q/115260

I hope you can reproduce the problem with the above instructions. Please note,
that the resolution option in the "pdftocairo" command is very critical. I did
not see the problem for "-r 171", for example.

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