Bug 1136450

Summary: gimp mangles colors (e.g. of png when loading from file)
Product: [Fedora] Fedora Reporter: David Tonhofer <bughunt>
Component: gimpAssignee: Nils Philippsen <nphilipp>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 20CC: nphilipp, phracek
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-09-03 08:33:44 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
As saved from ksnapshot
none
Color comparison: Gwenview vs. Gimp none

Description David Tonhofer 2014-09-02 15:07:24 UTC 
Created attachment 933820 [details]
As saved from ksnapshot

Description of problem:
-----------------------

I have a PNG image (a snapshot from a JIRA screen) that is perfectly well displayed in Gwenview. 

However, loaded into Gimp, the blue colors are mangled and get a reddish tinge. 

However, the color pick tool applied to the bad color picks up the correct color, #205081 instead of the displayed #30317c so it's really a problem of how #205081 is rendered.

Added a snapshot of the image in gwenview and Gimp for comparison.

This occurs for gimp-2.8.10-4.fc20.x86_64
Comment 1 David Tonhofer 2014-09-02 15:07:52 UTC 
Created attachment 933821 [details]
Color comparison: Gwenview vs. Gimp
Comment 2 David Tonhofer 2014-09-02 15:12:08 UTC 
Argh, disregard!

I didn't think about Display Filters.

Gimp has added Color Management for the Laptop Screen on which I am NOT working (I am working on the secondary screen now), and this is totally inappropriate for this secondary screen.

Switching it off fixes things.

Well, an error of that kind WOULD have been amazing.
Comment 3 Nils Philippsen 2014-09-03 08:33:44 UTC 
Figures. AIUI, color management for displays should be handled by the desktop environment (and per display), so moving windows between displays works without too drastic changes in color perception (if good profiles are in use).