There is another related thread Rewrite shellout.py to GIMP3, which is more Q&A/troubleshooting oriented.
For the sake of completeness, it might be worth briefly introducing the plugin here.

For any interest, details can be found here:
https://iiey.github.io/nikgimp

A little bit of C.

In C you have two kinds of data types.

• The "native" ones: int and floats of various lengths, and pointers (memory addresses)
  
• The "complex" ones (anything else, "structs" or arrays)
  

• native types are passed "by value": their value is copied in the call stack
  
• complex types are passed "by reference": a pointer to them is copied in the calls stack. The fact that this is a pointer is indicated by *
  
• the function can only "return" a single native type
  
• the function can also update memory locations to which a pointer has been passed, this is how extra return values can be used
  

• Except for constructors, in the C description the first argument of a class method is an object of the class
  
• When used with Python object syntax, this first argument becomes the object on which the method is called (with of course, one less argument). 
  
• So for instance the method described in the doc as do_something(SomeClass, arg1, arg2) is called in Python as instance_of_SomeClass.do_something(arg1,arg2)
  

• The function takes a reference to a GimpImage, so in this case this is the implicit reference to the object on which the method is called.
  
• The function takes a reference to gchar. This isn't an output for a single char, this is a reference to an array of characterss (arrays and pointer are equivalent in C, an array is defined by the address of its first element). And an array of gchar is... a string. What also indicates that this is an input-only argument is the const modifier.
  
• The call returns a pointer to a GimpLayer, so in Python, a plain Gimp.Layer
   
  

Hi everyone , I'm using Gimp 3.0.2-1 ( converted to Photogimp) and happens that when the window shows up the software don't let me adjust the window vertically , so....I can't be able to see the options of the lower right side compared to photoshop I'm talking about the another layer, opacity tool, and others. I tried to edit the preferences of window but no results to adjust the window vertically to fit the screen and I can be able to see the lower tools and options. Any recommend will be highly appreciated, my profound thanks in advance.

In GIMP 2 you could threshold the alpha channel (Layer > Transparency > Threshold Alpha...), in Python console equivalent was:

I keep getting the error message "Plug-in crashed: "file-svg.exe".   I've reloaded 3.0 but no change.  Do I need to delete current program and start over with a new download or is there some easy fix?  Thanks in advance.

Hello,

I installed GIMP 3.02 on a Windows 11 ARM computer.
When launching GIMP, a twain.exe application error window displays "The application could not start correctly error 0xc000007b," then GIMP runs correctly.
Thank you for your help.

Roberts

Still on Windows 10 and have had no issues with previous GIMP versions.

However versions of 3 have an issue.

The installation appears to have no issues and on completion asks you if you wish to start the program. You say yes and the interface for version 3 opens with no problem. However (whether you pin it to the taskbar or not) on closing it cannot be opened again as it has been installed and defaults to the exe for the previous version.

Foolishly I thought if I uninstalled that version a new 3 would be set up but there appears to be no way to say where the new version would be located so it fails.

In the App Data there are separate folders for each version but I cannot find an exe file.

I have therefore had to reinstall an earlier version and the latest download I could find is 2.8.22 although I am sure I had perhaps 2.10. 

What am I doing wrong please.

I'm running Linux Mint Mate 20.3 in a hundred notebooks for terminally ill kids in children's hospitals.. Often I must reinstall the OS in their computers because somehow a few of them kill the OS's.. But now when I configure the new Gimp in their notebooks, restart brings Gimp up not configured.. Seems I need an old version of Gimp for the kiddies computers running Linux Mint Mate 20.3.. I'd like to acquire a complete simple basic install ISO download of Gimp 2.1 so I can install it from a flash drive.. I just spent an hour bouncing around various older version Gimp websites downloading stuff here there and everywhere that doesn't work, in trying to find a suitable download ISO of the older Gimp that actually works in an Ubuntu-20.3 related OS, but I just can't find it.. Everything has been ultra modernized.. Can someone please tell me where I can find an old download of Gimp that actually works to install Gimp when you just click on the downloaded file...

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Does Gimp have an archives download website like how Linux Mint has this archive download website..?
https://thingsthemselves.com/linux-mint-archives/

I had a function in version 2 that inserted layers into a specific layer group.

I'm now trying to use the same procedure in Gimp 3 but have run into a type error.

First here's the doc:

Quote:This procedure adds the specified layer to the image at the given position. If the specified parent is a valid layer group (See 'gimp-item-is-group' and 'gimp-layer-group-new') then the layer is added inside the group. If the parent is 0, the layer is added inside the main stack, outside of any group. The position argument specifies the location of the layer inside the stack (or the group, if a valid parent was supplied), starting from the top (0) and increasing. If the position is specified as -1 and the parent is specified as 0, then the layer is inserted above the active layer, or inside the group if the active layer is a layer group. The layer type must be compatible with the image base type.

Hello everyone,

I have updated my AI plugins for GIMP 3. It's still a work in progress, but it's in a usable state. Feel free to reach out to ask questions or suggest improvements!
They also no longer require specific workflows or custom nodes, unless you intend to use LoRAs.
Currently I'm looking to update the previous auto selection feature to GIMP 3 as well as add AI upscaling options. These features are currently possible if you have an understanding of ComfyUI, but I intend to simplify the process and break them into their own plugins.

Video Demonstration
Github

Edit: Most of the dialog box options (ksampler, checkpoint, lora selection) and previews are optional. It should use the defaults within your selected workflow if values are not available.