Bug 288725

Summary:	support single-channel exr files (was: Some .exr files don't open correctly)
Product:	[Applications] krita	Reporter:	animtim
Component:	File formats	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED FIXED
Severity:	wishlist	CC:	cberger, dimula73, halla
Priority:	NOR
Version First Reported In:	git master (please specify the git hash!)
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Bug Depends on:	462799
Bug Blocks:

Description animtim 2011-12-11 14:15:20 UTC

Version:           svn trunk (using KDE 4.5.5) 
OS:                Linux

It looks like some files don't open correctly.
I use the sample image files provided at openexr website :
http://www.openexr.com/downloads.html

Reproducible: Didn't try

Steps to Reproduce:
Open TestImages/WideFloatRange.exr file from this archive:
http://download.savannah.nongnu.org/releases/openexr/openexr-images-1.7.0.tar.gz

Actual Results:  
it opens with no layer

Expected Results:  
Well I guess there should be at least one layer in this file !?

Same comment for MultiResolution and MultiView folders images, I think some are missing content at opening, though some multi layered stereo pictures do open apparently right (Adjuster.exr for instance)

Comment 1 Cyrille Berger 2011-12-11 16:30:22 UTC

The TestImages/WideFloatRange.exr file is not a RGB image, it only has a green channel. And krita only support RGB, and some of the weird things coming from blender.

Comment 2 Dmitry Kazakov 2014-04-01 08:36:05 UTC

How are we going to solve this bug? I'm seeing four ways out:

1) [worst approach] Implement complete support of werdly mixed channels in pigment
2) [a bit better] Implement only one-channel colorspaces. Still weird.
2) Convert incomplete channels into full RGB image on loading, notifying the user about it. We sacrifice round-trip load/save here.
3)  Load a single channel image as a grayscale one. What should we do with a two-channel image then?

Comment 3 Dmitry Kazakov 2014-04-01 08:37:00 UTC

Ah, we have the fifth option actually:

5) Refuse to load such images at all, explaining the user why we cannot do it.

Comment 4 Halla Rempt 2014-04-01 08:39:36 UTC

n-channel colorspaces are actually an intriguing option since they would also allow us to start implementing spot color...

Comment 5 Halla Rempt 2014-12-24 10:33:17 UTC

It's implemented in 2.9.