Bug 330023

Summary:	Large JPGs seem scaled even if viewed at 100% zoom.
Product:	[Applications] gwenview	Reporter:	Kamil Stepinski <kamil.stepinski>
Component:	general	Assignee:	Gwenview Bugs <gwenview-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	myriam, nate, yasuna
Priority:	NOR
Version First Reported In:	Other (add details in bug description)
Target Milestone:	---
Platform:	Kubuntu
OS:	Linux
URL:	https://picasaweb.google.com/113623586148155626661/Misc#5969456996113109586
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Kamil Stepinski 2014-01-16 11:59:56 UTC

JPG display quality is low when viewing large JPG files.
See the screenshot.
Gwenview on left, Firefox on right - both at 100% zoom level.
Take a look at fonts on the:
- black background - word "entirely" - the "l" letter is gone when viewed with gwenview.
 - orange background - letter "m" in the "marketing" word or letter "W" in the "WITH" word.
This behaviour that looks like interpolation can be seen in other places too - but the 2 examples above should show the problem clearly.
If I'm not mistaken this shouldn't happen at 100% zoom level - pictures should be pixel perfect then?

OS: Kubuntu 13.04

Reproducible: Always

Steps to Reproduce:
1. Download the example picture to the hard drive:
http://cdn2.hubspot.net/hub/53/blog/images/the-history-of-marketing-HUBSPOT-resized-600.jpg
2. Open at 100% view with gwenview and in other browser (checked Firefox, Chromium, ImageMagick). Image in gwenview looks bad (qualitatively) in comparison.

Comment 1 Christoph Feck 2014-06-16 12:12:28 UTC

*** Bug 336308 has been marked as a duplicate of this bug. ***

Comment 2 Nate Graham 2017-09-09 04:17:49 UTC

Looks great to me with Gwenview 17.11.70 in KDE Neon.