1#!/usr/local/bin/python
2# -*- coding: utf-8 -*-
3#    This program is free software: you can redistribute it and/or modify
4#   it under the terms of the GNU General Public License as published by
5#   the Free Software Foundation; either version 3 of the License, or
6#   (at your option) any later version.
7#
8#   This program is distributed in the hope that it will be useful,
9#   but WITHOUT ANY WARRANTY; without even the implied warranty of
10#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11#   GNU General Public License for more details.
12#
13#   You should have received a copy of the GNU General Public License
14#   along with this program.  If not, see <https://www.gnu.org/licenses/>.
15
16from gimpfu import *
17
18gettext.install("gimp20-python", gimp.locale_directory, unicode=True)
19
20def palette_offset(palette, amount):
21    #If palette is read only, work on a copy:
22    editable = pdb.gimp_palette_is_editable(palette)
23    if not editable:palette = pdb.gimp_palette_duplicate (palette)
24
25    num_colors = pdb.gimp_palette_get_info (palette)
26
27    tmp_entry_array = []
28    for i in xrange (num_colors):
29        tmp_entry_array.append  ((pdb.gimp_palette_entry_get_name (palette, i),
30                                  pdb.gimp_palette_entry_get_color (palette, i)))
31    for i in xrange (num_colors):
32        target_index = i + amount
33        if target_index >= num_colors:
34            target_index -= num_colors
35        elif target_index < 0:
36            target_index += num_colors
37        pdb.gimp_palette_entry_set_name (palette, target_index, tmp_entry_array[i][0])
38        pdb.gimp_palette_entry_set_color (palette, target_index, tmp_entry_array[i][1])
39    return palette
40
41
42register(
43    "python-fu-palette-offset",
44    N_("Offset the colors in a palette"),
45    "palette_offset (palette, amount) -> modified_palette",
46    "Joao S. O. Bueno Calligaris, Carol Spears",
47    "(c) Joao S. O. Bueno Calligaris",
48    "2004, 2006",
49    N_("_Offset Palette..."),
50    "",
51    [
52     (PF_PALETTE, "palette", _("Palette"), ""),
53     (PF_INT,     "amount",  _("Off_set"),  1),
54    ],
55    [(PF_PALETTE, "new-palette", "Result")],
56    palette_offset,
57    menu="<Palettes>",
58    domain=("gimp20-python", gimp.locale_directory)
59    )
60
61main ()
62