G'MIC-Qt plug-in for GIMP 3.0

David_Tschumperle · December 23, 2024, 4:08pm

Just a thread about the availability of our G’MIC-Qt plug-in for GIMP 3.0 (currently RC1).

Thanks to @samj , I’ve been able to update the code of the G’MIC-Qt plug-in, so that it compiles and run (apparently without much issues) on the release candidate of GIMP 3.0
I’ve updated the download page on the G’MIC website : G'MIC - GREYC's Magic for Image Computing: A Full-Featured Open-Source Framework for Image Processing - Download
to offer the plug-in binaries for Windows users (haven’t been able to deal with GIMP 3 libraries on a Linux distro yet).

The new section on the download page:

The plug-in running in GIMP 3.0 RC1, on Windows:

That’s good news.
Things are perfectible anyway. I know @samj has been able to compile with a complete clang++ chain and that is apparently faster than when using the C++ standard library from g++, but that will be probably on a second step

Moving to Qt6 is also a project. But I prefer to take it slow and make sure that everything works as planned at every micro-step.

In any case, don’t hesitate to test the plug-in for GIMP 3 and let me know if you have any problems.

OMarti · December 23, 2024, 4:51pm

I have gimp 2.10.38 and gimp 3.0.0-RC1 installed on a windows machine. The Plugin for gimp 3.0 works, but only if you install it from the zip-file. The exe-installer mistakenly installs the plugin at %appdata%\Gimp\2.10\plugins and not in %appdata%\gimp\3.0\plugins.

The reason is that the installer does not ask which version to use.

Maybe a hint could be useful.

David_Tschumperle · December 23, 2024, 5:05pm

Thanks for the feedback.
In the installer, the default install path is different for GIMP 2 and GIMP 3, so I guess this is due to the fact that the two installers use the same AppName.
I’ll try recompiling with different AppName to see if that fixes the issue.

OMarti · December 23, 2024, 5:23pm

Thanks! I have tested it, it works and I got the impression that it is faster than with Gimp 2.10.38.

Another Observation: I created a white layer and added some noise. G’Mic showed just white. The reason is, that the Noise was created as a non destructive layer. This puzzled me at first.

Joyeux Noël!

Reptorian · December 23, 2024, 6:43pm

Is there plans to add in more GUI elements? I always wanted grid version of some GUI elements.

David_Tschumperle · December 23, 2024, 7:15pm

Clearly, no.

G’MIC-Qt developer has passed away last October, and there are very few chances the plug-in gets new important evolutions in the future. If it can continue to function as it is, following the evolution of future GIMP versions, that would be already great.

David_Tschumperle · December 24, 2024, 12:58pm

Some news:
I’ve been able to switch to a full clang toolchain for compiling the G’MIC-Qt plug-in, both for GIMP 2.10 and GIMP 3.0 RC1.
@samj showed that this toolchain generates more optimized binaries, currently with MSYS2 (which is the tool I’m using for compiling).

New pre-release packages are currently uploading on the G’MIC website : Index of /files/prerelease
(the uploading is quite slow as I’m doing it from home. Check the date, it should be ready in a few dozen minutes).

samj · December 24, 2024, 10:34pm

@David_Tschumperle

Merci et joyeux Noël

Reptorian · December 25, 2024, 2:46am

I noticed faster execution time.

C:\Windows\System32>gmic 512,512 tic rep_pfrac 50 toc
[gmic]./ Start G'MIC interpreter (v.3.5.0).
[gmic]./ Input black image at position 0 (1 image 512x512x1x1).
[gmic]./ Initialize timer.
[gmic]./ Elapsed time: 0.236 s.
[gmic]./ Display image [0] = '[unnamed]'.
[0] = '[unnamed]':
  size = (512,512,1,1) [1024 Kio of float32].
  data = (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,3,4,3,4,5, ... ,2,2,2,2,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0).
  min = 0, max = 27236, mean = 32.718, std = 93.263, coords_min = (0,0,0,0), coords_max = (255,255,0,0).
[gmic]./ End G'MIC interpreter.

C:\Windows\System32>gmic 512,512 tic rep_pfrac 50 toc
[gmic]./ Start G'MIC interpreter (v.3.5.0).
[gmic]./ Input black image at position 0 (1 image 512x512x1x1).
[gmic]./ Initialize timer.
[gmic]./ Elapsed time: 0.306 s.
[gmic]./ Display image [0] = '[unnamed]'.
[0] = '[unnamed]':
  size = (512,512,1,1) [1024 Kio of float32].
  data = (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,3,4,3,4,5, ... ,2,2,2,2,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0).
  min = 0, max = 27160, mean = 32.7168, std = 93.1925, coords_min = (0,0,0,0), coords_max = (255,255,0,0).
[gmic]./ End G'MIC interpreter.

So, this does 512x512x50 loops in .23 s instead of .3 s. Thanks.

hover · December 28, 2024, 12:32pm

A feature request for GMIC 3.5+:
to make option for every filter to preview effect in whole layer image.

For example, with Break I can’t preview it, I can’t zoom out, only a part of layer image is previewed.

jtompkins66 · January 2, 2025, 4:19pm

Using the git URL GitHub - GreycLab/gmic-qt: G'MIC-Qt is a versatile front-end to the image processing framework G'MIC. I was able to compile and run gmic_gimp_qt for Gimp 3 RC2 on Kubuntu Linux 24.10. This is gmic_gimp_qt version 3.5.0_pre#24123122. I am no expert on Gimp or GMIC but it does do the few “filters” I tried.

darix · January 7, 2025, 2:05pm

anyone got gimp3 + gmic 3.5.0 Qt plugin working in a wayland session?

https://bugzilla.opensuse.org/show_bug.cgi?id=1218653#c7

prawnsushi · January 8, 2025, 9:33am

@darix Yes, on Asahi remix 41, with 3.5pre and now 3.5 official release.
Did nothing special…

darix · January 8, 2025, 1:31pm

to fix the issue with now build all the qmicQt UIs with Qt6 except for the krita plugin.

psychsocial · January 19, 2025, 9:04am

I have an issue with the ‘Color Presets’ G’MIC filter on the beta (flatpak) version. As for now, it doesn’t work; both in preview and when I apply it, it’s stuck on processing. Reverting back to the stable version, and it’s fine.

Not sure if its relevant but when I run it from console and run the filter I get
“qt.qpa.wayland: Wayland does not support QWindow::requestActivate()”

David_Tschumperle · January 19, 2025, 10:37am

The “Color Presets” filter requires the downloading of an external data file (http://gmic.eu/gmic_cluts.gmz), which is done automatically by the plug-in in a normal setting.
But it may happen this didn’t work for you, maybe because the use of the flatpack version adds some security constraints (either downloading constraints, or file storage constraints).
I’m not a flatpack expert so I cannot tell much more.

psychsocial · January 19, 2025, 10:54am

Thanks, my mistake. It seems that I removed the network access permission a long time ago; now when I re-enabled it, it’s working.

KeironO · January 19, 2025, 11:55am

I’m not sure if this is the correct place to ask, but I’ve installed GIMP 3.0.0-RC2+git using the nightly flatpak and I can’t seem to get any installation of GMIC to work with it.

How have you been able to resolve this?

psychsocial · January 19, 2025, 8:23pm

Skimming to test the filters I found that when applying ‘Warp [Interactive]’ I get this message

“*** Error in ./fx_warp_interactive/x_warp/ *** Command ‘x_warp’: No display available.”

Could this be another flatpak permission/sandbox issue?

David_Tschumperle · January 19, 2025, 8:34pm

Could be. This filter requires the opening of a X11 display, which is maybe forbidden inside a flatpack application. But as I said before, I’m not sure about it!