Bug 332635

Summary:	PDF Rendering Artifact in okular of LaTeX Square-root Symbols
Product:	[Applications] okular	Reporter:	SA <sujeet.akula>
Component:	PDF backend	Assignee:	Okular developers <okular-devel>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	aacid
Priority:	NOR
Version:	0.16.5
Target Milestone:	---
Platform:	Gentoo Packages
OS:	Linux
Latest Commit:		Version Fixed In:
Attachments:	Sample PDF. rendering Screenshot of rendering of the same document at similar zoom, via google-chrome

Description SA 2014-03-26 15:52:03 UTC

Created attachment 85767 [details]
Sample PDF.

I have noticed that the square-root expressions in PDFs generated with *TeX can end up looking very odd in okular at various zoom levels, while the same PDF viewed in e.g. the google-chrome PDF viewer are free of this artifact.

Attached a sample PDF page where the error is evident. An okular-generated raster image of the artifact is available here: http://i.imgur.com/ybHWkO1.png. Zoom was at 261.31% but is observed also at 350% among others.

Comment 1 Albert Astals Cid 2014-03-26 23:29:50 UTC

Created attachment 85776 [details]
rendering

Comment 2 Albert Astals Cid 2014-03-26 23:31:00 UTC

So you mean the one pixel whitespace between the flat part of the root and the initial part of it, right?

Comment 3 SA 2014-03-26 23:47:32 UTC

Created attachment 85777 [details]
Screenshot of rendering of the same document at similar zoom, via google-chrome

Yes exactly. For comparison, I have attached a screenshot of a rendering of the same PDF from google-chrome's PDF viewer. I cannot adjust the zoom to the exact same level, but the artifact is not visible at any accessible zoom level in chrome.

Comment 4 Albert Astals Cid 2014-03-27 00:00:10 UTC

Ok, this rendering issues are not Okular's fault since we only show what the poppler library produces. Please open a bug upstream at https://bugs.freedesktop.org