Layer opacity shortcut - Printable Version

Code:

#!/usr/bin/env python

# Author: Me

# Copyright 2018

# License: GPL v3

# GIMP plugin to do stuf for DaveMac

# For DaveMac:- https://www.gimp-forum.net/Thread-Layer-opacity-shortcut



import sys

sys.stderr = open("C:/tmp/gimp_python_errs.txt",'a')

sys.stdout=sys.stderr



from gimpfu import *

pdb = gimp.pdb



# this is the bit that does all the work

def dave_mac(image,drawable):

    if (drawable.opacity == 100):

      drawable.opacity = 60.0

    else:

      drawable.opacity = 100.0

    

    # The End of the main routine



# menu registration

register(

    "python-fu-dave_mac",

    "DaveMac",

    "Change Layer Opacity",

    "DaveMac",

    "gimp-forum.net",

    "16.03.2018",

    "Change Layer Opacity",

    "*",

    [

      (PF_IMAGE, "image",       "Input image", None),

      (PF_DRAWABLE, "drawable", "Input drawable", None),

    ],

    [],

    dave_mac,

    menu="<Image>/Layer/"

    )



main()

Code:

# -*- coding: utf-8 -*-

#!/usr/bin/env python



import os, sys

from gimpfu import *



# The functions that do it, they will be called with image/layer

# set to the image/layer on which you call the script

# Technically, they can also be called with 'layer' being actually a "channel",

# (layers and channels are both "drawable") but you can't set the opacity

# on a channel and the script will croak. Not really a problem here.



def opacity60(image,layer):

    pdb.gimp_layer_set_opacity(layer, 60)



def opacity100(image,layer):

    pdb.gimp_layer_set_opacity(layer, 100)



### Registrations



# Not strictly necessary, but this tells you where the file with the script is

whoiam='\n'+os.path.abspath(sys.argv[0])



# When Gimp starts it calls this script which executes the two calls to the register() 

# function which themselves call Gimp and tell it what/how to call in this file.

# As you can see you can have two functions in one single file

register(

    'opacity60',    # identifier of the plugin. When defining keybaird shortcut, look for python-fu-opacity60

    'Set opacity to 60%'+whoiam,    # The help on the menu (tells where the script file is)

    'Set opacity to 60%',           # "Additional information" in the PDB browser

    'Me','Myself','2018',           # Copyright/author info, normally

    '60%',                          # the menu item 

    "RGB*, GRAY*",  # Enable only on RGB and grayscale image (wouldn't work on color-indexed)

    # The two parameters to the script, set automatically with current image/layer

    [

        (PF_IMAGE, "image", "Input image", None),

        (PF_DRAWABLE, "drawable", "Input drawable", None)

    ],

    [],

    opacity60,                      # the function above in "def opacity60(image,layer)..."

    menu="<Image>/Layer/Opacity",   # the menu in which you'll hjave the '60%' item above

)



# Barebones version for 100%

register(

    'opacity100','','','','','','100%','RGB*, GRAY*', 

    [(PF_IMAGE, "image", "Input image", None),(PF_DRAWABLE, "drawable", "Input drawable", None)],[],

    opacity100,menu="<Image>/Layer/Opacity" 

)



main()