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9feaf02596
Though I am not fond of these macros for our core code (it makes the code more cumbersome especially for using private data in derivable types), this definitely makes sense for public API, since it would allow easier modifications with less chances of messing API/ABI stability.
285 lines
10 KiB
C
285 lines
10 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpthumbnailprocedure.c
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* Copyright (C) 2019 Michael Natterer <mitch@gimp.org>
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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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*/
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#include "config.h"
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#include "gimp.h"
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#include "libgimpbase/gimpwire.h" /* FIXME kill this include */
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#include "gimpplugin-private.h"
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#include "gimpthumbnailprocedure.h"
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#include "gimpprocedureconfig-private.h"
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struct _GimpThumbnailProcedure
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{
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GimpProcedure parent_instance;
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GimpRunThumbnailFunc run_func;
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gpointer run_data;
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GDestroyNotify run_data_destroy;
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};
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static void gimp_thumbnail_procedure_constructed (GObject *object);
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static void gimp_thumbnail_procedure_finalize (GObject *object);
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static GimpValueArray *
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gimp_thumbnail_procedure_run (GimpProcedure *procedure,
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const GimpValueArray *args);
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static GimpProcedureConfig *
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gimp_thumbnail_procedure_create_config
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(GimpProcedure *procedure,
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GParamSpec **args,
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gint n_args);
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G_DEFINE_TYPE (GimpThumbnailProcedure, gimp_thumbnail_procedure, GIMP_TYPE_PROCEDURE)
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#define parent_class gimp_thumbnail_procedure_parent_class
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static void
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gimp_thumbnail_procedure_class_init (GimpThumbnailProcedureClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpProcedureClass *procedure_class = GIMP_PROCEDURE_CLASS (klass);
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object_class->constructed = gimp_thumbnail_procedure_constructed;
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object_class->finalize = gimp_thumbnail_procedure_finalize;
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procedure_class->run = gimp_thumbnail_procedure_run;
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procedure_class->create_config = gimp_thumbnail_procedure_create_config;
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}
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static void
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gimp_thumbnail_procedure_init (GimpThumbnailProcedure *procedure)
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{
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}
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static void
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gimp_thumbnail_procedure_constructed (GObject *object)
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{
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GimpProcedure *procedure = GIMP_PROCEDURE (object);
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G_OBJECT_CLASS (parent_class)->constructed (object);
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gimp_procedure_add_file_argument (procedure, "file",
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"File",
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"The file to load the thumbnail from",
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GIMP_PARAM_READWRITE);
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gimp_procedure_add_int_argument (procedure, "thumb-size",
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"Thumb Size",
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"Preferred thumbnail size",
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16, 2014, 256,
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GIMP_PARAM_READWRITE);
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gimp_procedure_add_image_return_value (procedure, "image",
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"Image",
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"Thumbnail image",
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TRUE,
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GIMP_PARAM_READWRITE);
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gimp_procedure_add_int_return_value (procedure, "image-width",
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"Image width",
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"Width of the full-sized image (0 for unknown)",
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0, GIMP_MAX_IMAGE_SIZE, 0,
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GIMP_PARAM_READWRITE);
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gimp_procedure_add_int_return_value (procedure, "image-height",
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"Image height",
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"Height of the full-sized image (0 for unknown)",
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0, GIMP_MAX_IMAGE_SIZE, 0,
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GIMP_PARAM_READWRITE);
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gimp_procedure_add_enum_return_value (procedure, "image-type",
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"Image type",
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"Type of the image",
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GIMP_TYPE_IMAGE_TYPE,
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GIMP_RGB_IMAGE,
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GIMP_PARAM_READWRITE);
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gimp_procedure_add_int_return_value (procedure, "num-layers",
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"Num layers",
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"Number of layers in the image",
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1, G_MAXINT, 1,
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GIMP_PARAM_READWRITE);
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}
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static void
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gimp_thumbnail_procedure_finalize (GObject *object)
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{
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GimpThumbnailProcedure *procedure = GIMP_THUMBNAIL_PROCEDURE (object);
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if (procedure->run_data_destroy)
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procedure->run_data_destroy (procedure->run_data);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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#define ARG_OFFSET 2
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static GimpValueArray *
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gimp_thumbnail_procedure_run (GimpProcedure *procedure,
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const GimpValueArray *args)
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{
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GimpPlugIn *plug_in;
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GimpThumbnailProcedure *thumbnail_proc = GIMP_THUMBNAIL_PROCEDURE (procedure);
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GimpValueArray *remaining;
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GimpValueArray *return_values;
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GimpProcedureConfig *config;
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GFile *file;
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gint size;
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GimpPDBStatusType status = GIMP_PDB_EXECUTION_ERROR;
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gint i;
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file = GIMP_VALUES_GET_FILE (args, 0);
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size = GIMP_VALUES_GET_INT (args, 1);
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remaining = gimp_value_array_new (gimp_value_array_length (args) - ARG_OFFSET);
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for (i = ARG_OFFSET; i < gimp_value_array_length (args); i++)
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{
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GValue *value = gimp_value_array_index (args, i);
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gimp_value_array_append (remaining, value);
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}
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config = _gimp_procedure_create_run_config (procedure);
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_gimp_procedure_config_begin_run (config, NULL, GIMP_RUN_NONINTERACTIVE, remaining);
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gimp_value_array_unref (remaining);
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return_values = thumbnail_proc->run_func (procedure, file, size,
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config, thumbnail_proc->run_data);
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if (return_values != NULL &&
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gimp_value_array_length (return_values) > 0 &&
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G_VALUE_HOLDS_ENUM (gimp_value_array_index (return_values, 0)))
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status = GIMP_VALUES_GET_ENUM (return_values, 0);
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_gimp_procedure_config_end_run (config, status);
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/* This is debug printing to help plug-in developers figure out best
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* practices.
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*/
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plug_in = gimp_procedure_get_plug_in (procedure);
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if (G_OBJECT (config)->ref_count > 1 &&
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_gimp_plug_in_manage_memory_manually (plug_in))
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g_printerr ("%s: ERROR: the GimpThumbnailProcedure config object was refed "
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"by plug-in, it MUST NOT do that!\n", G_STRFUNC);
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g_object_unref (config);
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return return_values;
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}
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static GimpProcedureConfig *
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gimp_thumbnail_procedure_create_config (GimpProcedure *procedure,
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GParamSpec **args,
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gint n_args)
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{
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if (n_args > ARG_OFFSET)
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{
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args += ARG_OFFSET;
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n_args -= ARG_OFFSET;
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}
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else
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{
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args = NULL;
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n_args = 0;
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}
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return GIMP_PROCEDURE_CLASS (parent_class)->create_config (procedure,
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args,
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n_args);
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}
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/* public functions */
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/**
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* gimp_thumbnail_procedure_new:
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* @plug_in: a #GimpPlugIn.
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* @name: the new procedure's name.
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* @proc_type: the new procedure's #GimpPDBProcType.
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* @run_func: the run function for the new procedure.
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* @run_data: user data passed to @run_func.
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* @run_data_destroy: (nullable): free function for @run_data, or %NULL.
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*
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* Creates a new thumbnail procedure named @name which will call @run_func
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* when invoked.
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*
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* See gimp_procedure_new() for information about @proc_type.
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*
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* #GimpThumbnailProcedure is a #GimpProcedure subclass that makes it easier
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* to write file thumbnail procedures.
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*
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* It automatically adds the standard
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*
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* (#GFile, size)
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*
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* arguments and the standard
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*
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* (#GimpImage, image-width, image-height, #GimpImageType, num-layers)
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*
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* return value of a thumbnail procedure. It is possible to add
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* additional arguments.
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*
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* When invoked via gimp_procedure_run(), it unpacks these standard
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* arguments and calls @run_func which is a #GimpRunThumbnailFunc. The
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* "args" #GimpValueArray of #GimpRunThumbnailFunc only contains
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* additionally added arguments.
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*
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* #GimpRunThumbnailFunc must gimp_value_array_truncate() the returned
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* #GimpValueArray to the number of return values it actually uses.
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*
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* Returns: a new #GimpProcedure.
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*
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* Since: 3.0
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**/
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GimpProcedure *
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gimp_thumbnail_procedure_new (GimpPlugIn *plug_in,
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const gchar *name,
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GimpPDBProcType proc_type,
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GimpRunThumbnailFunc run_func,
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gpointer run_data,
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GDestroyNotify run_data_destroy)
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{
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GimpThumbnailProcedure *procedure;
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g_return_val_if_fail (GIMP_IS_PLUG_IN (plug_in), NULL);
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g_return_val_if_fail (gimp_is_canonical_identifier (name), NULL);
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g_return_val_if_fail (proc_type != GIMP_PDB_PROC_TYPE_INTERNAL, NULL);
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g_return_val_if_fail (proc_type != GIMP_PDB_PROC_TYPE_EXTENSION, NULL);
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g_return_val_if_fail (run_func != NULL, NULL);
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procedure = g_object_new (GIMP_TYPE_THUMBNAIL_PROCEDURE,
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"plug-in", plug_in,
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"name", name,
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"procedure-type", proc_type,
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NULL);
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procedure->run_func = run_func;
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procedure->run_data = run_data;
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procedure->run_data_destroy = run_data_destroy;
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return GIMP_PROCEDURE (procedure);
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}
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