Just saving it here for future reference if I need to use it.
It just runs on an animated gif (that's in RGB mode) and produces overlay fades so that it animates seamlessly.
from gimpfu import *
import random
import math
def python_loop_gif_tt(image, layer):
pass
#return
new_image = pdb.gimp_image_new(image.width,image.height,RGB)
display_new = pdb.gimp_display_new(new_image)
total_layers = len(image.layers) #120 when first tested
mid_layer = total_layers/2
bottom_layer = total_layers
for i in range(bottom_layer,mid_layer,-1): #loop from bottom layer to midlayer
lower_layer = pdb.gimp_layer_new_from_drawable(image.layers[i-1],new_image)
pdb.gimp_image_insert_layer(new_image,lower_layer,None,0)
upper_layer = pdb.gimp_layer_new_from_drawable(image.layers[(i-1+mid_layer)%total_layers],new_image)
pdb.gimp_image_insert_layer(new_image,upper_layer,None,0)
pdb.gimp_layer_set_opacity(upper_layer,min(100,(i-mid_layer)*100/mid_layer)) #this goes from fades from 100 to 0
pdb.gimp_image_merge_down(new_image,upper_layer,CLIP_TO_IMAGE)
for i in range(mid_layer,0,-1): #loop from mid layer to first layer
lower_layer = pdb.gimp_layer_new_from_drawable(image.layers[i-1],new_image)
pdb.gimp_image_insert_layer(new_image,lower_layer,None,0)
upper_layer = pdb.gimp_layer_new_from_drawable(image.layers[(i-1+mid_layer)%total_layers],new_image)
pdb.gimp_image_insert_layer(new_image,upper_layer,None,0)
pdb.gimp_layer_set_opacity(upper_layer,100-min(100,(i*100/mid_layer))) #this goes from 0 to 100
pdb.gimp_image_merge_down(new_image,upper_layer,CLIP_TO_IMAGE)
register(
"python_fu_loop_gif_tt",
"Loop Gif",
"Loop Gif",
"Tin Tran",
"Tin Tran",
"November 2022",
"<Image>/Python-Fu/Loop Gif", #Menu path
"RGB*, GRAY*",
[
#(PF_BRUSH, "brush", "Brush:", 0),
#(PF_SPINNER, "brush_size", "Brush-size:", 25, (1, 1000, 1)),
#(PF_SPINNER, "brush_spacing", "Brush-spacing:", 5, (1, 1000, 1)),
#(PF_SPINNER, "offset_angle", "Offset angle (angle to offset from path's angles):", 0, (0,360, 1)),
#(PF_TOGGLE, "random_angle", "Use random angle (when doing generally round blotches):", 0),
#(PF_SPINNER, "px_height", "Height of each tile image:", 100, (1, 1000, 50)),
],
[],
python_loop_gif_tt)
main()
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