Bug 77904

Summary:	rasterisation issue when using TikZ's doube line
Product:	poppler	Reporter:	yasinzaehringer-poppler
Component:	general	Assignee:	poppler-bugs <poppler-bugs>
Status:	RESOLVED MOVED	QA Contact:
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	Problematic PDF

Description yasinzaehringer-poppler 2014-04-24 17:10:29 UTC

Created attachment 97915 [details]
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] http://tex.stackexchange.com/questions/168071/tikz-double-line-rasterisation-issue
[2] https://bugs.kde.org/show_bug.cgi?id=332900

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%.

Comment 1 GitLab Migration User 2018-08-21 11:02:38 UTC

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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