How to copy guide lines in The Gimp?

Question

Is it possible to copy guide lines from one image to another?
I need this because I have several images that need exactly the same composition, so I want to use the guide lines for this.
There's no option to select & copy a guide line, so I must add them manually.

It would be nice, if there's a little script-fu script.

Okay, there are some interesting functions I found:

(gimp-image-find-next-guide image index)
(gimp_image_add_hguide image xposition)
(gimp_image_add_vguide image yposition)
(gimp_image_get_guide_orientation image guide)
(gimp_image_get_guide_position image guide)

Thanks in advance!

Answer 1

I'd really like to help you but I'm not sure I understand what you are trying to do. Could you edit the question to provide more details?

At a guess (pending more information) are you looking for something like this?

guide = 0
while guide = gimp_image_find_next_guide (image_1,guide) != 0
     position = gimp_image_get_guide_position (image_1,guide)
     if gimp_image_get_guide_orientation (image_1,guide) == 0
          gimp_image_add_hguide (image_2,position)
        else
          gimp_image_add_vguide (image_2,position)

Note that this is pseudo-code, since the functions you mentioned seem to be part of an API that is using a syntax other than scheme-ish script fu.

But the first question is what are you trying to accomplish? -- after that we can worry about the details of how.

Answer 2

Having been wanting to learn Gimp Scripts (PythonFu) for a while and requiring this functionality I used the Pseudo code provided by MarkusQ and this handy tutorial https://jacksonbates.wordpress.com/python-fu-gimp-scripting-tutorial-pages/ to create a script to copy guidelines from one image to another.

#!/usr/bin/env python

from gimpfu import *

def CopyGuidelines(image_1, drawable, image_2):     
    guide = pdb.gimp_image_find_next_guide(image_1, 0)
    while guide != 0 :
        position = pdb.gimp_image_get_guide_position (image_1,guide)        
        if pdb.gimp_image_get_guide_orientation (image_1,guide) == 0:
            pdb.gimp_image_add_hguide (image_2,position)
        else:
            pdb.gimp_image_add_vguide (image_2,position)
        guide = pdb.gimp_image_find_next_guide (image_1,guide)      

register(
    "python-fu-CopyGuidelines",
    "Copy Guidelines",
    "Copy Guidelines from one image to another",
    "Anthony", "JustAGuyCoding", "2017",
    "Copy Guidelines",
    "", # type of image it works on (*, RGB, RGB*, RGBA, GRAY etc...)
    [
        (PF_IMAGE, "image_1", "takes current image", None),
        (PF_DRAWABLE, "drawable", "Input layer", None),
        (PF_IMAGE, "image_2", "takes other image", None)
    ],
    [],
    CopyGuidelines, menu="<Image>/Tools")  

main()

You'll need to copy this in to a CopyGuidelines.py file and put it your Gimp's plugin directory (See Preferences > Folders ) and restart Gimp to see the CopyGuideline option under Tools. Then open up the two images, select the one with the Guidelines and select CopyGuidelines to run the script.