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plug-ins: start porting palette-to-gradient to new GimpPlugIn API. 

Several aspects of the new API are kind of broken in the Python binding,
especially the arguments. So this first version has no arguments at all.
This also means it cannot be installed in "<Palettes>" menu for the time
being. This is work-in-progress and the missing parts will be
uncommented later when we figure out how to fix the problems.
This commit is contained in:
Jehan 2019-08-01 20:34:14 +02:00
parent ed86de48d2
commit 17667b7ddf
1 changed files with 75 additions and 52 deletions
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127
plug-ins/python/palette-to-gradient.py
View File

@ -16,6 +16,9 @@
import gi
gi.require_version('Gimp', '3.0')
from gi.repository import Gimp
from gi.repository import GObject
from gi.repository import GLib
from gi.repository import Gio
import sys
import gettext
@ -47,63 +50,83 @@ def make_gradient(palette, num_segments, num_colors):
Gimp.param_from_string(gradient)]
return len(retval), retval
def palette_to_gradient_repeating(palette):
def palette_to_gradient(procedure, args, data):
# Localization
plug_in = procedure.get_plug_in()
plug_in.set_translation_domain ("gimp30-python",
Gio.file_new_for_path(Gimp.locale_directory()))
palette = Gimp.context_get_palette()
(_, num_colors) = Gimp.palette_get_info(palette)
num_segments = num_colors
return make_gradient(palette, num_segments, num_colors)
def palette_to_gradient(palette):
(_, num_colors) = Gimp.palette_get_info(palette)
num_segments = num_colors - 1
return make_gradient(palette, num_segments, num_colors)
if procedure.get_name() == 'python-fu-palette-to-gradient':
num_segments = num_colors - 1
else: # 'python-fu-palette-to-gradient-repeating'
num_segments = num_colors
gradient = make_gradient(palette, num_segments, num_colors)
def run(name, n_params, params):
# run_mode = params[0].get_int32()
if name == 'python-fu-palette-to-gradient-repeating':
return palette_to_gradient_repeating(Gimp.context_get_palette())
else:
return palette_to_gradient(Gimp.context_get_palette())
# XXX: for the error parameter, we want to return None.
# Unfortunately even though the argument is (nullable), pygobject
# looks like it may have a bug. So workaround is to just set a
# generic GLib.Error() since anyway the error won't be process with
# GIMP_PDB_SUCCESS status.
# See pygobject#351
retval = procedure.new_return_values(Gimp.PDBStatusType.SUCCESS, GLib.Error())
def query():
param = Gimp.ParamDef()
param.type = Gimp.PDBArgType.INT32
param.name = "run-mode"
param.description = _("Run mode")
# TODO: uncomment when GParamSpec bug is fixed.
#value = retval.index(1)
#value.set_string (gradient);
return retval
retval = Gimp.ParamDef()
retval.type = Gimp.PDBArgType.STRING
retval.name = "new-gradient"
retval.description = _("Result")
class PaletteToGradient (Gimp.PlugIn):
def do_query_procedures(self):
# XXX See pygobject#352 for the weird return value.
return ['python-fu-palette-to-gradient',
'python-fu-palette-to-gradient-repeating'], 2
Gimp.install_procedure(
"python-fu-palette-to-gradient-repeating",
N_("Create a repeating gradient using colors from the palette"),
"Create a new repeating gradient using colors from the palette.",
"Carol Spears, reproduced from previous work by Adrian Likins and Jeff Trefftz",
"Carol Spears",
"2006",
N_("Palette to _Repeating Gradient"),
"",
Gimp.PDBProcType.PLUGIN,
[ param ],
[ retval ])
Gimp.plugin_menu_register("python-fu-palette-to-gradient-repeating", "<Palettes>")
def do_create_procedure(self, name):
procedure = Gimp.Procedure.new(self, name,
Gimp.PDBProcType.PLUGIN,
palette_to_gradient, None)
if name == 'python-fu-palette-to-gradient':
procedure.set_menu_label(N_("Palette to _Gradient"))
procedure.set_documentation(N_("Create a gradient using colors from the palette"),
"Create a new gradient using colors from the palette.",
"")
elif name == 'python-fu-palette-to-gradient-repeating':
procedure.set_menu_label(N_("Palette to _Repeating Gradient"))
procedure.set_documentation(N_("Create a repeating gradient using colors from the palette"),
"Create a new repeating gradient using colors from the palette.",
"")
else:
procedure = None
Gimp.install_procedure(
"python-fu-palette-to-gradient",
N_("Create a gradient using colors from the palette"),
"Create a new gradient using colors from the palette.",
"Carol Spears, reproduced from previous work by Adrian Likins and Jeff Trefftz",
"Carol Spears",
"2006",
N_("Palette to _Gradient"),
"",
Gimp.PDBProcType.PLUGIN,
[ param ],
[ retval ])
Gimp.plugin_menu_register("python-fu-palette-to-gradient", "<Palettes>")
Gimp.plugin_domain_register("gimp30-python", Gimp.locale_directory())
if procedure is not None:
procedure.set_attribution("Carol Spears, reproduced from previous work by Adrian Likins and Jeff Trefftz",
"Carol Spears", "2006")
returnspec = GObject.param_spec_string("new-gradient",
"Name of the newly created gradient",
"Name of the newly created gradient",
None,
GObject.ParamFlags.READWRITE)
# Passing a GObjectParamSpec currently fails.
# TODO: see pygobject#227
#procedure.add_return_value(returnspec)
info = Gimp.PlugInInfo ()
info.set_callbacks (None, None, query, run)
Gimp.main_legacy (info, sys.argv)
paramspec = GObject.param_spec_enum("run-mode",
"Run mode",
"The run mode",
Gimp.RunMode.__gtype__,
Gimp.RunMode.NONINTERACTIVE,
GObject.ParamFlags.READWRITE)
# TODO: see pygobject#227
#procedure.add_argument(paramspec)
# TODO: To be installed in '<Palettes>', we need a run mode
# parameter. Wait for the GParamSpec bug to be fixed before
# uncommenting.
#procedure.add_menu_path ('<Palettes>')
return procedure
Gimp.main(PaletteToGradient.__gtype__, sys.argv)