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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
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</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - rasterisation issue when using TikZ's doube line"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77904">77904</a>
</td>
</tr>
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<th>Assignee</th>
<td>poppler-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>rasterisation issue when using TikZ's doube line
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Reporter</th>
<td>yasinzaehringer-poppler@yhjz.de
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Component</th>
<td>general
</td>
</tr>
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<th>Product</th>
<td>poppler
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=97915" name="attach_97915" title="Problematic PDF">attachment 97915</a> <a href="attachment.cgi?id=97915&action=edit" title="Problematic PDF">[details]</a></span>
Problematic PDF
Okular (the KDE document viewer) does not correctly rasterise the attached PDF
at certain (resolution-dependant) zoom levels. The problem is probably an
anti-aliasing issue when two rectangles with slightly different width are drawn
on top of each other to produce an equal sign. It seems to be a poppler issue
as Evince shows a similar bug, though not as drastic as Okular. I checked a few
other viewers, in particular Adobe Acrobat, and none of them showed the issue.
The LaTeX code to produce the PDF can be found here [1]. My Okular bug report
can be found here [2]. There you may also find a few screenshots which
illustrate the problem. I can confirm the bug on my KUbuntu 14.04 netbook with
poppler version 0.24.5. However, the bug isn't new, it is at least 2 years old.
[1]
<a href="http://tex.stackexchange.com/questions/168071/tikz-double-line-rasterisation-issue">http://tex.stackexchange.com/questions/168071/tikz-double-line-rasterisation-issue</a>
[2] <a href="https://bugs.kde.org/show_bug.cgi?id=332900">https://bugs.kde.org/show_bug.cgi?id=332900</a>
Steps to Reproduce:
Load the PDF and try different zoom levels. (The 'bad' zoom levels seem to
dependent on the screen resolution.) On my netbook (1024x600), the issue
appears below 200%.</pre>
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