mirror of https://github.com/GNOME/gimp.git
191 lines
7.3 KiB
Python
191 lines
7.3 KiB
Python
#!/usr/bin/env python3
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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import gi
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gi.require_version('Gimp', '3.0')
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from gi.repository import Gimp
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gi.require_version('GimpUi', '3.0')
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from gi.repository import GimpUi
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from gi.repository import GObject
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from gi.repository import GLib
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from gi.repository import Gio
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gi.require_version('Gtk', '3.0')
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from gi.repository import Gtk
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import sys
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def N_(message): return message
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def _(message): return GLib.dgettext(None, message)
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def make_gradient(palette, num_segments, num_colors):
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# name the gradient same as the source palette
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# For now, the name of a resource is the same as the ID
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palette_name = palette.get_name()
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gradient = Gimp.Gradient.new(palette_name)
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# assert gradient is valid but is has only one segment
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assert gradient.get_number_of_segments() == 1
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# split one segment into desired count
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# index is zero-based
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gradient.segment_range_split_uniform( 0, 0, num_segments)
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for color_number in range(0,num_segments):
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if color_number == num_colors - 1:
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color_number_next = 0
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else:
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color_number_next = color_number + 1
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_, color_left = palette.entry_get_color(color_number)
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_, color_right = palette.entry_get_color(color_number_next)
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gradient.segment_set_left_color( color_number, color_left, 100.0)
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gradient.segment_set_right_color(color_number, color_right, 100.0)
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# Side effects on the context. Probably not what most would expect.
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Gimp.context_set_gradient(gradient)
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return gradient
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def run(procedure, config, data):
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# Get the parameters
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run_mode = config.get_property("run-mode")
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if run_mode == Gimp.RunMode.INTERACTIVE:
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GimpUi.init(procedure.get_name())
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dialog = GimpUi.ProcedureDialog(procedure=procedure, config=config)
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# Add palette button
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dialog.fill (["palette"])
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if not dialog.run():
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dialog.destroy()
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return procedure.new_return_values(Gimp.PDBStatusType.CANCEL, GLib.Error())
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dialog.destroy()
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palette = config.get_property("palette")
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if palette is None or not palette.is_valid():
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if palette is not None:
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sys.stderr.write(f'Invalid palette id: {palette.get_id()}\n')
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sys.stderr.write('This should not happen. Please report to GIMP project.\n')
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sys.stderr.write('Falling back to context palette instead.\n')
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palette = Gimp.context_get_palette()
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config.set_property("palette", palette)
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num_colors = palette.get_color_count()
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if procedure.get_name() == 'python-fu-palette-to-gradient':
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num_segments = num_colors - 1
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else: # 'python-fu-palette-to-gradient-repeating'
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num_segments = num_colors
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gradient = make_gradient(palette, num_segments, num_colors)
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# XXX: for the error parameter, we want to return None.
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# Unfortunately even though the argument is (nullable), pygobject
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# looks like it may have a bug. So workaround is to just set a
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# generic GLib.Error() since anyway the error won't be process with
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# GIMP_PDB_SUCCESS status.
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# See pygobject#351
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retval = procedure.new_return_values(Gimp.PDBStatusType.SUCCESS, GLib.Error())
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# XXX: I don't try to get the GValue with retval.index(1) because it
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# actually return a string (cf. pygobject#353). Just create a new
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# GValue and replace the default one with this one.
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# This comment dates from when resources are strings:
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# value = GObject.Value(GObject.TYPE_STRING, gradient)
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value = GObject.Value(Gimp.Gradient, gradient)
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retval.remove(1)
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retval.insert(1, value)
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return retval
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class PaletteToGradient (Gimp.PlugIn):
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## Parameter: run mode ##
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@GObject.Property(type=Gimp.RunMode,
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default=Gimp.RunMode.NONINTERACTIVE,
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nick="Run mode", blurb="The run mode")
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def run_mode(self):
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'''The run mode (unused)'''
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return self.runmode
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@run_mode.setter
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def run_mode(self, runmode):
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self.runmode = runmode
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## Parameter: palette ##
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@GObject.Property(type=Gimp.Palette,
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default=None,
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nick= _("_Palette"))
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def palette(self):
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'''Palette or None for the currently selected palette'''
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return self.palette
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@palette.setter
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def palette(self, palette):
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self.palette = palette
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## Properties: return values ##
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@GObject.Property(type=Gimp.Gradient,
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default="",
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nick=_("The newly created gradient"),
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blurb=_("The newly created gradient"))
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def new_gradient(self):
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"""Read-write integer property."""
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return self.new_gradient
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@new_gradient.setter
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def new_gradient(self, new_gradient):
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self.new_gradient = new_gradient
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## GimpPlugIn virtual methods ##
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def do_set_i18n(self, procname):
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return True, 'gimp30-python', None
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def do_query_procedures(self):
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return ['python-fu-palette-to-gradient',
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'python-fu-palette-to-gradient-repeating']
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def do_create_procedure(self, name):
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procedure = Gimp.Procedure.new(self, name,
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Gimp.PDBProcType.PLUGIN,
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run, None)
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if name == 'python-fu-palette-to-gradient':
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procedure.set_menu_label(_("Palette to _Gradient"))
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procedure.set_documentation(_("Create a gradient using colors from the palette"),
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_("Create a new gradient using colors from the palette."),
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"")
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elif name == 'python-fu-palette-to-gradient-repeating':
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procedure.set_menu_label(_("Palette to _Repeating Gradient"))
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procedure.set_documentation(_("Create a repeating gradient using colors from the palette"),
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_("Create a new repeating gradient using colors from the palette."),
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"")
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else:
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procedure = None
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if procedure is not None:
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procedure.set_attribution("Carol Spears, reproduced from previous work by Adrian Likins and Jeff Trefftz",
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"Carol Spears", "2006")
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# We don't build a GParamSpec ourselves because passing it
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# around is apparently broken in Python. Hence this trick.
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# See pygobject#227
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procedure.add_argument_from_property(self, "run-mode")
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procedure.add_argument_from_property(self, "palette")
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procedure.add_return_value_from_property(self, "new-gradient")
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procedure.add_menu_path ('<Palettes>')
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return procedure
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Gimp.main(PaletteToGradient.__gtype__, sys.argv)
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