Bug 297813

Summary:	rendering quality of pdf with text image is worse compared to the same of evince
Product:	[Applications] okular	Reporter:	Yuri <yuri>
Component:	PDF backend	Assignee:	Okular developers <okular-devel>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	aacid, cfeck
Priority:	NOR
Version:	0.13.2
Target Milestone:	---
Platform:	FreeBSD Ports
OS:	FreeBSD
Latest Commit:		Version Fixed In:
Attachments:	screenshot of comparison to evince pdf sample page

Description Yuri 2012-04-10 02:00:59 UTC

Looking at screenshot, you can see that the same pdf looks much more edgy in Okular.

In addition, even though both Evince and Okular have image zoomed at 400%, actual text sizes are different, and okular shows the larger text. Not sure who is right. But if to display the text with regards to the same actual screen resolution, only one size can be right.

Comment 1 Yuri 2012-04-10 02:02:15 UTC

Created attachment 70277 [details]
screenshot of comparison to evince

Comment 2 Yuri 2012-04-10 02:22:18 UTC

Created attachment 70278 [details]
pdf sample page

Comment 3 Yuri 2012-04-10 02:24:56 UTC

Actually, I made a mistake. Okular shows the smaller text, Evince shows larger one, and Acrobat shows the same even larger at the same 400% zoom. Two of them or all of them must be wrong.

Evince shows the best rendering quality compared to two others.

Comment 4 Albert Astals Cid 2012-04-10 16:45:51 UTC

This is an upstream (poppler) issue. Please report the bug at https://bugs.freedesktop.org/

Comment 5 Yuri 2012-04-10 17:10:37 UTC

The problem with reporting this upstream to poppler is that evince is also using poppler (http://en.wikipedia.org/wiki/Evince). So it must be something in the way how poppler is used, maybe some option, that triggers the rendering problem. Same with the scaling issue.

Comment 6 Albert Astals Cid 2012-04-10 17:22:15 UTC

I'm the poppler maintainer, trust me.

Comment 7 Yuri 2012-04-11 01:19:18 UTC

same was reported upstream: https://bugs.freedesktop.org/show_bug.cgi?id=48513