RawTherapee to GIMP: Keep RTv4_sRGB or convert to GIMP built-in sRGB?

micha · August 7, 2020, 5:08pm

hallo Glenn Butcher,

these lcms I found in my PC, which should match?

ggbutcher · August 7, 2020, 5:38pm

I’m going to let @gaaned92 answer, as he’s probably more familiar with what GIMP links…

afre · August 7, 2020, 8:07pm

Folks, note that @micha is using Windows and likely using a pre-built binary.

gaaned92 · August 7, 2020, 8:43pm

I never built a Windows GIMP and I have not the least idea what LCMS2 dll version is linked with the binary used by @micha.

Even for my nightly builds, I am not able to identify afterwards what were the dependencies packages version. Back from vacation I will think how to keep track of all dependencies versions.

micha · August 7, 2020, 9:14pm

Hallo ganed92,
please don’t stress yourself. I don’t think it has anything to do with lcms. It is a problem of Gimp 2.10.20 and the RTv4_sRGB profile. Different profile or different Gimp version: no problem.

sguyader · August 9, 2020, 1:36am

I was referring to lcms2 version 2.11 and Gimp version 2.10.xx. Recently on Linux I reported crashes in Gimp when lcms2 was still in version 2.10. When my Linux distro got the lcms2 2.11 update, the crash was fixed.
Maybe the bug was only for Linux systems, but I thought I’d mention it just in case.

micha · August 9, 2020, 7:59pm

My Problem with Gimp 2.10.20 and RTv4_sRGB is solved!

I replace the DLL: C:\Program files\GIMP 2\bin\liblcms2-2.dll
by the one you can get here:
lcms2-2.11-dll-win64-gimp.zip (246.2 KB)
The issue is solved, definitively GIMP is using the bad version.

Regards

micha · August 10, 2020, 8:40am

Hello, does anyone know how to tell the gimp-makers about the bug?

Tobias · August 10, 2020, 9:30am

Yes, open an issue here:

micha · August 10, 2020, 9:49am

Hallo Tobias,
thank you very much. I saw the Gitlab. But I’m totally swamped here. I don’t have an account there either.
Anybody wanna do it for me and for Gimp?
Here again the description of the bug:
In Gimp 2.10.20 (Windows) is lcms2 2.10, this has a bug und has to be replaceb by 2.11

Tobias · August 10, 2020, 11:50am

It’s better if you open the issue, because then you can answer questions if there are more.

micha · August 10, 2020, 11:52am

Ok, thank you.

sguyader · August 10, 2020, 12:09pm

The Gimp devs are aware of the issue with lcms2. It is them who advised me to updated lcms2 to version 2.11 when I filed the bug on their gitlab repo. The bug is not in Gimp, it is in lcms2 and has been fixed.
Now, it is up to the Gimp packager(s) to distribute the latest lmcs2 dll in their windows packages, but I don’t know packaging issues are to be filed on the Gimp gitlab or somewhere else…

micha · August 10, 2020, 12:25pm

hallo sguyader,
Oh, thank you very much. I just tried to report the error on gitlab/gnome. But I couldn’t. I’ll let it go and hope the packers get the information anyway.

sguyader · August 10, 2020, 12:30pm

Here’s my original bug report on the Gimp gitlab: Gimp crashes manipulating layers of images saved with come ICC color profiles (#5432) · Issues · GNOME / GIMP · GitLab (closed as it is not a bug in Gimp but in lcms2)

And a link to the archlinux bug report, showing that it is a matter of packaging the right version of the lcms2 library: [solved] Seg fault starting GIMP / Applications & Desktop Environments / Arch Linux Forums