#!/usr/bin/env python
# Author: Chris Mohler
# Copyright 2010 Chris Mohler
# License: GPL v3
# Version 0.1
# GIMP plugin combine PNG files, simulating a 6-color silkscreen

from gimpfu import *
gettext.install("gimp20-python", gimp.locale_directory, unicode=True)


def unseparate_pngs(scolor, opacity, file_1, color_1, file_2, color_2,
                    file_3, color_3, file_4, color_4,
                    file_5, color_5, file_6, color_6):
    files = [file_1, file_2, file_3, file_4, file_5, file_6]
    colors = [color_1, color_2, color_3, color_4, color_5, color_6]
    i = 1
    for f in files: 
        if f:
            try:
                img = pdb.gimp_file_load(f, '')
            except:
                pdb.gimp_message('Could not open file: ' + str(f))
                exit()
            if i == 1:
                base = pdb.gimp_image_new(img.width, img.height, 0)
		base.undo_freeze()
		
                sub = pdb.gimp_channel_new(base, base.width, base.height, 'Substrate', 100, scolor)
                pdb.gimp_image_add_channel(base, sub, 0)
            
            chan = pdb.gimp_channel_new(base, base.width, base.height, 'Color ' + str(i), opacity, colors[i-1])
            pdb.gimp_image_add_channel(base, chan, 0)
            sel = pdb.gimp_selection_all(img)
            pix = pdb.gimp_edit_copy(pdb.gimp_image_get_active_drawable(img))
            pdb.gimp_edit_paste(chan, 0)
            i = i + 1
    sel = pdb.gimp_image_get_floating_sel(base)
    pdb.gimp_floating_sel_anchor(sel)
    l = pdb.gimp_layer_new(base, base.width, base.height, 0, "Layer 0", 100, 0)
    pdb.gimp_drawable_fill(l, 2) 
    pdb.gimp_image_add_layer(base, l, 0) 
    pdb.gimp_display_new(base)
    base.clean_all()
    base.undo_thaw()

            
register(
    proc_name=("python-fu-unseparate-pngs"),
    blurb=("Unseparate PNG files"),
    help=("Unseparate PNG files, simulating a 6-color silkscreen."),
    author=("Chris Mohler"),
    copyright=("Chris Mohler"),
    date=("2010"),
    label=("_Unseparate PNGs"),
    imagetypes=(""),
    params=[
        (PF_COLOR, "scolor", "Substrate Color", (0,0,0)),
        (PF_SLIDER, "opacity", "Ink Opacity", 80, [0,100,1]),
	(PF_FILE, "file_1", "File 1", ""),
	(PF_COLOR, "color_1", "Color 1", (255,255,255)),
	(PF_FILE, "file_2", "File 2", ""),
	(PF_COLOR, "color_2", "Color 2", (255,0,0)),
	(PF_FILE, "file_3", "File 3", ""),
	(PF_COLOR, "color_3", "Color 3", (22,22,200)),
	(PF_FILE, "file_4", "File 4", ""),
	(PF_COLOR, "color_4", "Color 4", (22,200,22)),
	(PF_FILE, "file_5", "File 5", ""),
	(PF_COLOR, "color_5", "Color 5", (200,200,22)),
	(PF_FILE, "file_6", "File 6", ""),
	(PF_COLOR, "color_6", "Color 6", (22,200,200)),
	   ],
    results=[],
    function=(unseparate_pngs), 
    menu=("<Image>/Filters/Sil_kscreen Tools"), 
    domain=("gimp20-python", gimp.locale_directory)
    )

main()