问GIMP:多层自动模糊/褪色/掩蔽边缘

EN

#! /usr/bin/env python
# coding: utf-8


import gimp
from gimpfu import *


def recurse_blend(img, root, amount):
    if hasattr(root, "layers"):
        # is image or layer group
        for layer in root.layers:
            recurse_blend(img, layer, amount)
        return
    layer = root
    if not layer.linked:
        return # Ignore layers not marked as "linked" in the UI.
    # Perform the actual actions:
    pdb.gimp_image_select_color(img, CHANNEL_OP_REPLACE, layer, (0,0,0))
    pdb.gimp_selection_shrink(img, amount)
    pdb.gimp_selection_invert(img)
    pdb.gimp_selection_feather(img, amount * 2)
    pdb.gimp_edit_clear(layer)


def blend_layers(img, drawable, amount):

    # Ignore drawable (active layer or channel on GIMP)
    # and loop recursively through all layers

    pdb.gimp_image_undo_group_start(img)
    pdb.gimp_context_push()
    try:
        # Change the selection-by-color options
        pdb.gimp_context_set_sample_threshold(1)
        pdb.gimp_context_set_sample_transparent(False)
        pdb.gimp_context_set_sample_criterion(SELECT_CRITERION_COMPOSITE)
        recurse_blend(img, img, amount)
    finally:
        # Try to restore image's undo state, even in the case
        # of a failure in the Python statements.
        pdb.gimp_context_pop()  # restores context
        pdb.gimp_selection_none(img)
        pdb.gimp_image_undo_group_end(img)


register(
    "image_blend_linked_layers_edges",  # internal procedure name
    "Blends selected layers edges",  # Name being displayed on the UI
    "Blend the edges of each layer to the background",
    "João S. O. Bueno",  # author
    "João S. O. Bueno",  # copyright holder
    "2018",              # copyright year(s)
    "Belnd layers edges", # Text for menu options
    "*",                  # available for all types of images
     [
        (PF_IMAGE, "image", "Input image", None),  # Takes active image as input
        (PF_DRAWABLE, "drawable", "Input drawable", None),  # takes active layer as input
        (PF_INT, "Amount", "amount to smooth at layers edges", 5),   # prompts user for integer value (default 5)
    ],
    [],  # no output values
    blend_layers, # main function, that works as entry points
    menu="<Image>/Filters/Layers",  # Plug-in domain (<Image>) followed by Menu position.
    )

main()