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+---- Thread: Help with Image stacking (/Thread-Help-with-Image-stacking)
Help with Image stacking - csoulman - 07-18-2019
I've been using GIMP for a long time and have some familiarity using BIMP but I recently came across something I need to automate that it can't without scripting or a plugin. I would like to start with an image with a white background and stack multiple PNG images on top of each other. For what I need, it will just be the same image stacked on top of itself a variable number of times. Basically like this:
----
Start with a new, square dimension image.
Take a PNG file with a transparent background
Put the first image near the top left corner
Then place another copy a few pixels down and to the right (variable pixels and number of times).
----
Something tells me this can be done with a script or plugin. I do have some programming experience and I'm learning Python now, but if a method, plugin, or script exists I would be able to use I would appreciate being steered in the right direction. Any help you can give me would be greatly appreciated!
RE: Help with Image stacking - Ofnuts - 07-18-2019
You just need to set the offsets of the layers, for instance, to stack the layers in a diagonal:
Code:
for i,l in enumerate(image.layers):
l.set_offsets(i*stepSize,i*stepSize)Plenty of example Python plugins here. If any questions about them, just ask below.
RE: Help with Image stacking - tmanni - 07-18-2019
A non-optimized way to do it :
Code:
#!/usr/bin/env python
#-*- coding: utf8 -*-
from gimpfu import *
def your_plug_in_function(image, filename, n_copy, x_start, y_start, h_offset, v_offset):
image.undo_group_start()
offset_x = x_start
offset_y = y_start
if not n_copy:
return
for i in range(n_copy):
layer = pdb.gimp_file_load_layer (image, filename)
pdb.gimp_layer_set_offsets(layer, offset_x, offset_y)
image.insert_layer(layer)
offset_x += h_offset
offset_y += v_offset
image.undo_group_end()
register(
"python_fu_plug_in_name_here",
"the short plug-in description",
"the long plug-in description",
"your name here ",
"your name here",
"the year",
"the plug-in name",
"*",
[
(PF_IMAGE, "image", "active image", None),
(PF_FILENAME, "filename", "File to load", None),
(PF_INT, "n_copy", "Number of image copies", 5),
(PF_INT, "x_start", "x position of the first layer", 0),
(PF_INT, "y_start", "y position of the first layer", 0),
(PF_INT, "h_offset", "Horizontal spacing", 1),
(PF_INT, "v_offset", "Vertical spacing", 1),
],
[],
your_plug_in_function, menu="<Image>/csoulman")
main()Save the above code in a file in the appropriate place (sorry, I'm linux addict, I don't know where windows user must save their plug-ins)
Ensure the file has execution rights.
Run GIMP : you will have a menu called 'csoulman' with one entry : 'the plug-in name'
To improve it :
- load the image only once, then use layer.copy()
- check pdb.gimp_file_load_layer success