Hi all,
I'm doing my first steps in scripting and wanna know how to apply colour cube filter to an image from a script (either script-fu or python). Is it possible to exract all colors value by their html names or RGB values?

Thanks in advance

It is possible to fetch the value of a pixel using 'gimp-drawable-get-pixel'. Using a script to access individual pixels is rather slow and you would be better served to write a plug-in (using C language); but for learning purposes, a script for this would be fine.

I have written the following color cube Script-fu (I was bored) which you can examine to see how it works. It is, as stated, rather slow and I would not recommend using it on images with dimensions larger than a couple of hundred pixels.

http://flashingtwelve.brickfilms.com/GIMP/Scripts/colorcube.scm

And here is a sample output (using the Mona Lisa as the sampled image):

Thanks Saulgoode for your help. When I tried to apply the script attached to your reply I got the following error message:

Error while executing
(script-fu-indexed-color-cube 23 187)
ERROR: Procedural database execution failed:
(gimp_drawable_set_pixel 190 50 500 4 #4"00ce00ff"


any idea what's the problem?

Thanks alot

Perhaps try opening the Script-fu console (in the Xtns menu) and executing the following command (only have a single image open):

(script-fu-indexed-color-cube (aref (cadr (gimp-image-list)) 0) (car (gimp-image-get-active-layer (aref (cadr (gimp-image-list)) 0))

That might provide a better indication of where the error occurs.

When I execute the above command in Sript-Fu Console I got the following error message (only one file is open):
ERROR: end of file inside list

Thanks

I can't find that error being generated anywhere in the code. Which version of GIMP are you using?

I'm using Gimp version 2.2.13
Thanks