Bug 314377

Summary: Digikam should display images without interpolation when zoom is > 200%
Product: [Applications] digikam Reporter: Luke <lcampagn>
Component: Preview-ImageAssignee: Digikam Developers <digikam-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: normal CC: caulier.gilles
Priority: NOR    
Version First Reported In: 2.8.0   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In: 4.3.0
Sentry Crash Report:

Description Luke 2013-02-03 20:25:32 UTC 
When I zoom in to an image greater than about 200%, I am generally interested in looking at the individual pixels. Digikam makes this difficult by displaying the image with pixels interpolated, even for the largest zoom values (compare to GIMP, for example, which switches to nearest-neighbor interpolation after about 150% zoom). This happens in the image preview and image editor, probably other places as well. If I remember correctly, this was not always the case. 

Reproducible: Always

Steps to Reproduce:
1. View any image
2. Zoom in to 1200%

Actual Results:  
Pixel boundaries are not clear due to image smoothing.

Expected Results:  
pixels should be drawn without smoothing; square with clearly-defined boundaries.
Comment 1 caulier.gilles 2014-08-29 22:09:53 UTC 
If you don't want to show interpolation in preview mode, just switch preview image loading option to use full size image instead a reduced size.

Note : typical case to use reduced size preview if to have a better time responding with slow computers when image are loaded to memory.

So for me, the current implementation from git/master work as expected...

Gilles Caulier