How does GIMP treat the files that are in 16bit or 32bit mode when saving them directly to JPG?

Since JPG is 8bit only, does GIMP automatically convert to 8bit or do I have to do it myself?

Hi. Having a rough time understanding have to manipulate individual pixel's trough gimp python.
So far i have found this constructor drawable.get_pixel_rgn(x, y, w, h, [dirty, [shadow]) an been able to set a variable to it and call member from sayd variable but that about it.
Found a Gnome site with descriptive information.
Did try to install numpy into gimp with no luck. But don't think i need that module for now.
What my end goal comprise of is to be able to edit individual pixel RGB values along side it's alpha/opacity.
A little information on have to set rgb if that is with a 3-tuple or an hue int, with how/were opacity is set would be nice also

I have one remark on the 'export tiles' script. If I export a few tiles then everything seems to be right. The script saves the different photos in the chosen folder and when I look at the photos with a viewer, then I see the separate photos I worked on. When I look with the windows explorer at the directory with the photos I worked on, the preview set on 'big pictorgrams', then the pictogram shows all the photos I worked on in a session. A bug ? 

      
On the left one of the four photos I worked on, on the right the preview icon. When I click on the right icon, I see one photo I worked on (and that is ok)

I've been trying to take an image and make it transparent for use on a webpage I'm making for a practice project.

I've found this icon, which looks ideal:
https://toppng.com/uploads/preview/arrow...cxsqad.png

I've managed to add an alpha layer and remove the background so that I have a transparent layer on my website. The problem comes when I try to make the icon itself transparent. I've tried:

 - Using the layer tool to make the whole layer 50% opaque
 - Using the fill, eraser, colors>map>color exchange, etc features to make the icon transparent. They all make it look transparent on my GIMP software, but when I put them on my website it stops working.

Can anyone please help me out and save my sanity?

I've been hitting this error message lately when running the gimp-console in batch mode and not sure what to do about it:

Hi all,

I've been trying hard to get a batch script converted over from script-fu in Python but I'm struggling to get it to close the process as I can't seem to get it to close GIMP. The script runs but it won't kill the process so is making everything hang. 

I can't seem to find any docs on how to actually do some of this stuff, it seems that those that know, know and I'm not sure how to fill in the gaps in my knowledge. 

Up front I'm new to python but a long in the tooth coder in various other languages.

So my question is, what is the correct way to close GIMP these days?

I'm running GIMP 2.10.18 on Windows 10

This is roughly my command I'm running:

"C:\Program Files\GIMP 2\bin\gimp-console-2.10.exe" -id --batch-interpreter python-fu-eval -b "import sys;sys.path=['.']+sys.path;import mydynamicTextReplace;dynamicTextReplace.process('my_example_param_1')"

So far I've tried (yep I'm in cut and paste "lets see if this works" land at this point):

1. Adding '-b (gimp-quit 0)' to the end of the command, this was a left over from the script-fu script and I think this fails as I've told it to use the python parser not script-fu?
   
2. Adding '-b "pdb.gimp_quit(1)" ' to the end of the command, no luck with this one
   
3. Adding '-b "gimp.quit(1)" ' to the end of the command, no luck with this one either
   
4. Adding variations of "gimp.quit" and "pdb.quit" to the end of my script that I'm importing but these all seem to have zero effect
   

When I select stroke selection i keep on antialising but it's still giving a hard edge, as in there's not that graduated blend of pixels at the edges. Why doesn't it work?

It's just in the way, I tried defaulting window preferences and restarting yet it still does this

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So i was just wondering when you have like 10 images on the right side, i have to go through each image one by one to do want i want to do. I was wondering is there a away using transparency you can edit through all of them at once, like select all but that doesn't work. Thanks

Another offshoot of the Parametric curves. Draws rose-like figures.

To get the plugin, go to

http://kmarkku.arkku.net/

follow the link 'Applications', and click the second Download button there. That gives you a .zip file. Unzip it, put the .py file into your Gimp's plug-ins folder, and restart Gimp. The plugin 'Rhodonea' will be in

Filters/Render/Parametric curves/Special cases

If there are any problems, please tell me.