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gimp/plug-ins/python/palette-sort.py
Alx Sa d10a8c357f plug-ins: Allow Python GUI resources to be empty 
Resolves #11772
While ba79fd00 fixed the number of
arguments in the resource arguments,
setting them to False prevented the GUI
from opening if the gradient wasn't set.
This patch switches the value to True to
fix the problem.
2024-07-07 19:19:16 +00:00

480 lines
20 KiB
Python
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
# For a detailed explanation of the parameters of this plugin, see :
# https://gitlab.gnome.org/GNOME/gimp/-/issues/4368#note_763460
# little known, colorsys is part of Python's stdlib
from colorsys import rgb_to_yiq
from textwrap import dedent
from random import randint
import struct
import gi
gi.require_version('Babl', '0.1')
from gi.repository import Babl
gi.require_version('Gimp', '3.0')
from gi.repository import Gimp
gi.require_version('GimpUi', '3.0')
from gi.repository import GimpUi
from gi.repository import GObject
from gi.repository import GLib
from gi.repository import Gio
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
import sys
def N_(message): return message
def _(message): return GLib.dgettext(None, message)
AVAILABLE_CHANNELS = (_("Red"), _("Green"), _("Blue"),
_("Luma (Y)"),
_("Hue"), _("Saturation"), _("Value"),
_("Saturation (HSL)"), _("Lightness (HSL)"),
_("Index"),
_("Random"))
channel_getters = [
(lambda v, i: v.get_rgba()[0]),
(lambda v, i: v.get_rgba()[1]),
(lambda v, i: v.get_rgba()[2]),
(lambda v, i: rgb_to_yiq(v.get_rgba()[0], v.get_rgba()[1], v.get_rgba()[1])[0]),
# TODO: Replace with gegl_color_get_hsv () when available in Gegl
(lambda v, i: gegl_color_bytes_convert (v, "HSV float", 'fff', 0)),
(lambda v, i: gegl_color_bytes_convert (v, "HSV float", 'fff', 1)),
(lambda v, i: gegl_color_bytes_convert (v, "HSV float", 'fff', 2)),
(lambda v, i: gegl_color_bytes_convert (v, "HSL float", 'fff', 1)),
(lambda v, i: gegl_color_bytes_convert (v, "HSL float", 'fff', 2)),
(lambda v, i: i),
(lambda v, i: randint(0, 0x7fffffff)),
(lambda v, i: gegl_color_bytes_convert (v, "CIE Lab float", 'fff', 0)),
(lambda v, i: gegl_color_bytes_convert (v, "CIE Lab float", 'fff', 1)),
(lambda v, i: gegl_color_bytes_convert (v, "CIE Lab float", 'fff', 2)),
(lambda v, i: gegl_color_bytes_convert (v, "CIE LCH(ab) float", 'fff', 1)),
(lambda v, i: gegl_color_bytes_convert (v, "CIE LCH(ab) float", 'fff', 2))
]
GRAIN_SCALE = (1.0, 1.0 , 1.0,
1.0,
360., 100., 100.,
100., 100.,
16384.,
float(0x7ffffff),
100., 256., 256.,
256., 360.,)
def gegl_color_bytes_convert (color, format, precision, index):
color_bytes = color.get_bytes(Babl.format(format))
data = color_bytes.get_data()
result = struct.unpack (precision, data)
return result[index]
slice_expr_doc = N_("""
Format is 'start:nrows,length' . All items are optional.
The empty string selects all items, as does ':'
':4,' makes a 4-row selection out of all colors (length auto-determined)
':4' also.
':1,4' selects the first 4 colors
':,4' selects rows of 4 colors (nrows auto-determined)
':3,4' selects 3 rows of 4 colors
'4:' selects a single row of all colors after 4, inclusive.
'3:,4' selects rows of 4 colors, starting at 3 (nrows auto-determined)
'2:3,4' selects 3 rows of 4 colors (12 colors total), beginning at index 2.
'4' is illegal (ambiguous)
""")
def parse_slice(s, numcolors):
"""Parse a slice spec and return (start, nrows, length)
All items are optional. Omitting them makes the largest possible selection that
exactly fits the other items.
In general, slices are comparable to a numpy sub-array.
'start at element START, with shape (NROWS, LENGTH)'
"""
s = s.strip()
def notunderstood():
raise ValueError('Slice %r not understood. Should be in format'
' START?:NROWS?,ROWLENGTH? eg. "0:4,16".' % s)
def _int(v):
try:
return int(v)
except ValueError:
notunderstood()
if s in ('', ':', ':,'):
return 0, 1, numcolors # entire palette, one row
if s.count(':') != 1:
notunderstood()
rowpos = s.find(':')
start = 0
if rowpos > 0:
start = _int(s[:rowpos])
numcolors -= start
nrows = 1
if ',' in s:
commapos = s.find(',')
nrows = s[rowpos+1:commapos]
length = s[commapos+1:]
if not nrows:
if not length:
notunderstood()
else:
length = _int(length)
if length == 0:
notunderstood()
nrows = numcolors // length
if numcolors % length:
nrows = -nrows
elif not length:
nrows = _int(nrows)
if nrows == 0:
notunderstood()
length = numcolors // nrows
if numcolors % nrows:
length = -length
else:
nrows = _int(nrows)
if nrows == 0:
notunderstood()
length = _int(length)
if length == 0:
notunderstood()
else:
nrows = _int(s[rowpos+1:])
if nrows == 0:
notunderstood()
length = numcolors // nrows
if numcolors % nrows:
length = -length
return start, nrows, length
def quantization_grain(channel, g):
"Given a channel and a quantization, return the size of a quantization grain"
g = max(1.0, g)
if g <= 1.0:
g = 0.00001
else:
g = max(0.00001, GRAIN_SCALE[channel] / g)
return g
def palette_sort(palette, selection, slice_expr, channel1, ascending1,
channel2, ascending2, quantize, pchannel, pquantize):
grain1 = quantization_grain(channel1, quantize)
grain2 = quantization_grain(channel2, quantize)
pgrain = quantization_grain(pchannel, pquantize)
# If palette is read only, work on a copy:
editable = palette.is_editable()
if not editable:
palette = palette.duplicate()
num_colors = palette.get_color_count()
start, nrows, length = None, None, None
if selection == "auto-slice":
def find_index(color, startindex=0):
for i in range(startindex, num_colors):
c = palette.entry_get_color(i)
rgba = c.get_rgba()
if rgba[0] == color[1].r and rgba[1] == color[1].g and rgba[2] == color[1].b:
return i
return None
def hexcolor(c):
return "#%02x%02x%02x" % (int(255 * rgba[0]), int(255 * rgba[1]), int(255 * rgba[2]))
fg = Gimp.context_get_foreground()
bg = Gimp.context_get_background()
start = find_index(fg)
end = find_index(bg)
if start is None:
raise ValueError("Couldn't find foreground color %s in palette" % hexcolor(fg))
if end is None:
raise ValueError("Couldn't find background color %s in palette" % hexcolor(bg))
if find_index(fg, start + 1):
raise ValueError('Autoslice cannot be used when more than one'
' instance of an endpoint'
' (%s) is present' % hexcolor(fg))
if find_index(bg, end + 1):
raise ValueError('Autoslice cannot be used when more than one'
' instance of an endpoint'
' (%s) is present' % hexcolor(bg))
if start > end:
end, start = start, end
length = (end - start) + 1
try:
_, nrows, _ = parse_slice(slice_expr, length)
nrows = abs(nrows)
if length % nrows:
raise ValueError('Total length %d not evenly divisible'
' by number of rows %d' % (length, nrows))
length //= nrows
except ValueError:
# bad expression is okay here, just assume one row
nrows = 1
# remaining behavior is implemented by "slice-array" 'inheritance'.
selection = "slice-array"
elif selection in ("slice-array", "partitioned"):
start, nrows, length = parse_slice(slice_expr, num_colors)
channels_getter_1 = channel_getters[channel1]
channels_getter_2 = channel_getters[channel2]
def get_colors(start, end):
result = []
for i in range(start, end):
entry = (palette.entry_get_name(i)[1],
palette.entry_get_color(i))
index1 = channels_getter_1(entry[1], i)
index2 = channels_getter_2(entry[1], i)
index = ((index1 - (index1 % grain1)) * (1 if ascending1 else -1),
(index2 - (index2 % grain2)) * (1 if ascending2 else -1)
)
result.append((index, entry))
return result
print (selection)
if selection == "all":
entry_list = get_colors(0, num_colors)
entry_list.sort(key=lambda v: v[0])
for i in range(num_colors):
palette.entry_set_name(i, entry_list[i][1][0])
palette.entry_set_color(i, entry_list[i][1][1])
elif selection == "partitioned":
if num_colors < (start + length * nrows) - 1:
raise ValueError('Not enough entries in palette to '
'sort complete rows! Got %d, expected >=%d' %
(num_colors, start + length * nrows))
pchannels_getter = channel_getters[pchannel]
for row in range(nrows):
partition_spans = [1]
rowstart = start + (row * length)
old_color = palette.entry_get_color(rowstart)
old_partition = pchannels_getter(old_color, rowstart)
old_partition = old_partition - (old_partition % pgrain)
for i in range(rowstart + 1, rowstart + length):
this_color = palette.entry_get_color(i)
this_partition = pchannels_getter(this_color, i)
this_partition = this_partition - (this_partition % pgrain)
if this_partition == old_partition:
partition_spans[-1] += 1
else:
partition_spans.append(1)
old_partition = this_partition
base = rowstart
for size in partition_spans:
palette_sort(palette, "slice-array", '%d:1,%d' % (base, size),
channel1, ascending1,
channel2, ascending2,
quantize, 0, 1.0)
base += size
else:
# "slice-array" and "auto-slice"
stride = length
if num_colors < (start + stride * nrows) - 1:
raise ValueError('Not enough entries in palette to sort '
'complete rows! Got %d, expected >=%d' %
(num_colors, start + stride * nrows))
for row_start in range(start, start + stride * nrows, stride):
sublist = get_colors(row_start, row_start + stride)
sublist.sort(key=lambda v: v[0])
for i, entry in zip(range(row_start, row_start + stride), sublist):
palette.entry_set_name(i, entry[1][0])
palette.entry_set_color(i, entry[1][1])
return palette
# FIXME: Write humanly readable help -
# See for reference: https://gitlab.gnome.org/GNOME/gimp/-/issues/4368#note_763460
# Important to describe the general effect on palettes rather than details of the sort.
help_doc = r"""
Sorts a palette, or part of a palette.
Sorts the given palette when it is editable, otherwise creates a new sorted palette.
The default is a 1D sort, but you can also sort over two color channels
or create a 2D sorted palette with sorted rows.
You can optionally install colormath (https://pypi.python.org/pypi/colormath/1.0.8)
to GIMP's Python to get even more channels to choose from.
"""
class PaletteSort (Gimp.PlugIn):
## GimpPlugIn virtual methods ##
def do_set_i18n(self, procname):
return True, 'gimp30-python', None
def do_query_procedures(self):
return ["python-fu-palette-sort"]
def do_create_procedure(self, name):
procedure = None
if name == "python-fu-palette-sort":
procedure = Gimp.Procedure.new(self, name,
Gimp.PDBProcType.PLUGIN,
self.run, None)
procedure.set_menu_label(_("_Sort Palette..."))
procedure.set_documentation(
_("Sort the colors in a palette"),
help_doc,
""
)
procedure.set_attribution("João S. O. Bueno, Carol Spears, David Gowers",
"João S. O. Bueno, Carol Spears, David Gowers",
"2006-2014")
procedure.add_menu_path ('<Palettes>/Palettes Menu')
procedure.add_enum_argument ("run-mode", _("Run mode"),
_("The run mode"), Gimp.RunMode,
Gimp.RunMode.INTERACTIVE,
GObject.ParamFlags.READWRITE)
procedure.add_palette_argument ("palette", _("_Palette"),
_("Palette"), True,
GObject.ParamFlags.READWRITE)
selection_choice = Gimp.Choice.new()
selection_choice.add("all", 0, _("All"), "")
selection_choice.add("slice-array", 1, _("Slice / Array"), "")
selection_choice.add("auto-slice", 2, _("Autoslice (fg->bg)"), "")
selection_choice.add("partitioned", 3, _("Partitioned"), "")
procedure.add_choice_argument ("selections", _("Select_ions"), _("Selections"),
selection_choice, "all", GObject.ParamFlags.READWRITE)
# TODO: It would be much simpler to replace the slice expression with three
# separate parameters: start-index, number-of-rows, row_length
procedure.add_string_argument ("slice-expr", _("Slice _expression"),
_(slice_expr_doc), "",
GObject.ParamFlags.READWRITE)
channel_choice = Gimp.Choice.new()
self.add_choices (channel_choice)
procedure.add_choice_argument ("channel1", _("Channel _to sort"), _("Channel to sort"),
channel_choice, "luma", GObject.ParamFlags.READWRITE)
procedure.add_boolean_argument ("ascending1", _("_Ascending"), _("Ascending"),
True, GObject.ParamFlags.READWRITE)
channel_choice2 = Gimp.Choice.new()
self.add_choices (channel_choice2)
procedure.add_choice_argument ("channel2", _("Secondary C_hannel to sort"),
_("Secondary Channel to sort"), channel_choice2,
"saturation", GObject.ParamFlags.READWRITE)
procedure.add_boolean_argument ("ascending2", _("Ascen_ding"), _("Ascending"),
True, GObject.ParamFlags.READWRITE)
procedure.add_double_argument ("quantize", _("_Quantization"),
_("Quantization"), 0.0, 1.0, 0.0,
GObject.ParamFlags.READWRITE)
pchannel_choice = Gimp.Choice.new()
self.add_choices (pchannel_choice)
procedure.add_choice_argument ("pchannel", _("Partitionin_g channel"),
_("Partitioning channel"), pchannel_choice,
"luma", GObject.ParamFlags.READWRITE)
procedure.add_double_argument ("pquantize", _("Partition q_uantization"),
_("Partition quantization"), 0.0, 1.0, 0.0,
GObject.ParamFlags.READWRITE)
procedure.add_palette_return_value ("new-palette", _("Palette"),
_("Palette"), GObject.ParamFlags.READWRITE)
return procedure
def run(self, procedure, config, data):
run_mode = config.get_property("run-mode")
palette = config.get_property("palette")
if palette is None or not palette.is_valid():
if palette is not None:
sys.stderr.write(f'Invalid palette id: {palette.get_id()}\n')
sys.stderr.write('This should not happen. Please report to GIMP project.\n')
sys.stderr.write('Falling back to context palette instead.\n')
palette = Gimp.context_get_palette()
config.set_property("palette", palette)
if not palette.is_valid():
palette_name = palette.get_id()
error = f'Invalid palette id: {palette_name}'
return procedure.new_return_values(Gimp.PDBStatusType.CALLING_ERROR,
GLib.Error(error))
if run_mode == Gimp.RunMode.INTERACTIVE:
GimpUi.init('python-fu-palette-sort')
dialog = GimpUi.ProcedureDialog(procedure=procedure, config=config)
dialog.fill (["palette"])
dialog.fill (["selections","slice-expr"])
dialog.fill (["channel1", "ascending1"])
dialog.fill (["channel2","ascending2", "quantize"])
dialog.fill (["pchannel","pquantize"])
if not dialog.run():
dialog.destroy()
return procedure.new_return_values(Gimp.PDBStatusType.CANCEL, GLib.Error())
dialog.destroy()
palette = config.get_property("palette")
selection = config.get_property("selections")
slice_expr = config.get_property("slice-expr")
channel1 = config.get_choice_id("channel1")
ascending1 = config.get_property ("ascending1")
channel2 = config.get_choice_id("channel2")
ascending2 = config.get_property ("ascending2")
quantize = config.get_property ("quantize")
pchannel = config.get_choice_id("pchannel")
pquantize = config.get_property ("pquantize")
try:
new_palette = palette_sort(palette, selection, slice_expr, channel1, ascending1,
channel2, ascending2, quantize, pchannel, pquantize)
except ValueError as err:
return procedure.new_return_values(Gimp.PDBStatusType.EXECUTION_ERROR,
GLib.Error(str(err)))
return_val = procedure.new_return_values(Gimp.PDBStatusType.SUCCESS, GLib.Error())
value = GObject.Value(Gimp.Palette, new_palette)
return_val.remove(1)
return_val.insert(1, value)
return return_val
def add_choices (self, choice):
#TODO: Re-incorporate LAB and LCHab options with GeglColor
choice.add("red", 0, _("Red"), "")
choice.add("green", 1, _("Green"), "")
choice.add("blue", 2, _("Blue"), "")
choice.add("luma", 3, _("Luma (Y)"), "")
choice.add("hue", 4, _("Hue"), "")
choice.add("saturation", 5, _("Saturation"), "")
choice.add("value", 6, _("Value"), "")
choice.add("saturation-hsl", 7, _("Saturation (HSL)"), "")
choice.add("lightness-hsl", 8, _("Lightness (HSL)"), "")
choice.add("index", 9, _("Index"), "")
choice.add("random", 10, _("Random"), "")
choice.add("lightness-lab", 11, _("Lightness (LAB)"), "")
choice.add("a-color", 12, _("A-color"), "")
choice.add("b-color", 13, _("B-color"), "")
choice.add("chroma-lchab", 14, _("Chroma (LCHab)"), "")
choice.add("hue-lchab", 15, _("Hue (LCHab)"), "")
Gimp.main(PaletteSort.__gtype__, sys.argv)
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