267 lines
9.0 KiB
C
267 lines
9.0 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikathumbnailprocedure.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 "pika.h"
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#include "pikathumbnailprocedure.h"
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struct _PikaThumbnailProcedurePrivate
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{
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PikaRunThumbnailFunc 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 pika_thumbnail_procedure_constructed (GObject *object);
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static void pika_thumbnail_procedure_finalize (GObject *object);
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static PikaValueArray *
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pika_thumbnail_procedure_run (PikaProcedure *procedure,
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const PikaValueArray *args);
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static PikaProcedureConfig *
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pika_thumbnail_procedure_create_config
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(PikaProcedure *procedure,
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GParamSpec **args,
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gint n_args);
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G_DEFINE_TYPE_WITH_PRIVATE (PikaThumbnailProcedure, pika_thumbnail_procedure,
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PIKA_TYPE_PROCEDURE)
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#define parent_class pika_thumbnail_procedure_parent_class
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static void
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pika_thumbnail_procedure_class_init (PikaThumbnailProcedureClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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PikaProcedureClass *procedure_class = PIKA_PROCEDURE_CLASS (klass);
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object_class->constructed = pika_thumbnail_procedure_constructed;
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object_class->finalize = pika_thumbnail_procedure_finalize;
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procedure_class->run = pika_thumbnail_procedure_run;
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procedure_class->create_config = pika_thumbnail_procedure_create_config;
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}
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static void
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pika_thumbnail_procedure_init (PikaThumbnailProcedure *procedure)
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{
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procedure->priv = pika_thumbnail_procedure_get_instance_private (procedure);
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}
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static void
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pika_thumbnail_procedure_constructed (GObject *object)
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{
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PikaProcedure *procedure = PIKA_PROCEDURE (object);
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G_OBJECT_CLASS (parent_class)->constructed (object);
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PIKA_PROC_ARG_FILE (procedure, "file",
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"File",
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"The file to load the thumbnail from",
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PIKA_PARAM_READWRITE);
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PIKA_PROC_ARG_INT (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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PIKA_PARAM_READWRITE);
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PIKA_PROC_VAL_IMAGE (procedure, "image",
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"Image",
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"Thumbnail image",
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TRUE,
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PIKA_PARAM_READWRITE);
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PIKA_PROC_VAL_INT (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, PIKA_MAX_IMAGE_SIZE, 0,
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PIKA_PARAM_READWRITE);
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PIKA_PROC_VAL_INT (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, PIKA_MAX_IMAGE_SIZE, 0,
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PIKA_PARAM_READWRITE);
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PIKA_PROC_VAL_ENUM (procedure, "image-type",
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"Image type",
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"Type of the image",
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PIKA_TYPE_IMAGE_TYPE,
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PIKA_RGB_IMAGE,
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PIKA_PARAM_READWRITE);
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PIKA_PROC_VAL_INT (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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PIKA_PARAM_READWRITE);
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}
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static void
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pika_thumbnail_procedure_finalize (GObject *object)
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{
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PikaThumbnailProcedure *procedure = PIKA_THUMBNAIL_PROCEDURE (object);
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if (procedure->priv->run_data_destroy)
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procedure->priv->run_data_destroy (procedure->priv->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 PikaValueArray *
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pika_thumbnail_procedure_run (PikaProcedure *procedure,
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const PikaValueArray *args)
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{
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PikaThumbnailProcedure *thumbnail_proc = PIKA_THUMBNAIL_PROCEDURE (procedure);
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PikaValueArray *remaining;
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PikaValueArray *return_values;
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GFile *file;
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gint size;
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gint i;
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file = PIKA_VALUES_GET_FILE (args, 0);
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size = PIKA_VALUES_GET_INT (args, 1);
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remaining = pika_value_array_new (pika_value_array_length (args) - ARG_OFFSET);
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for (i = ARG_OFFSET; i < pika_value_array_length (args); i++)
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{
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GValue *value = pika_value_array_index (args, i);
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pika_value_array_append (remaining, value);
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}
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return_values = thumbnail_proc->priv->run_func (procedure,
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file,
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size,
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remaining,
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thumbnail_proc->priv->run_data);
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pika_value_array_unref (remaining);
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return return_values;
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}
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static PikaProcedureConfig *
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pika_thumbnail_procedure_create_config (PikaProcedure *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 PIKA_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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* pika_thumbnail_procedure_new:
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* @plug_in: a #PikaPlugIn.
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* @name: the new procedure's name.
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* @proc_type: the new procedure's #PikaPDBProcType.
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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 pika_procedure_new() for information about @proc_type.
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*
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* #PikaThumbnailProcedure is a #PikaProcedure 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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* (#PikaImage, image-width, image-height, #PikaImageType, 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 pika_procedure_run(), it unpacks these standard
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* arguments and calls @run_func which is a #PikaRunThumbnailFunc. The
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* "args" #PikaValueArray of #PikaRunThumbnailFunc only contains
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* additionally added arguments.
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*
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* #PikaRunThumbnailFunc must pika_value_array_truncate() the returned
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* #PikaValueArray to the number of return values it actually uses.
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*
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* Returns: a new #PikaProcedure.
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*
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* Since: 3.0
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**/
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PikaProcedure *
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pika_thumbnail_procedure_new (PikaPlugIn *plug_in,
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const gchar *name,
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PikaPDBProcType proc_type,
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PikaRunThumbnailFunc 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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PikaThumbnailProcedure *procedure;
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g_return_val_if_fail (PIKA_IS_PLUG_IN (plug_in), NULL);
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g_return_val_if_fail (pika_is_canonical_identifier (name), NULL);
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g_return_val_if_fail (proc_type != PIKA_PDB_PROC_TYPE_INTERNAL, NULL);
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g_return_val_if_fail (proc_type != PIKA_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 (PIKA_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->priv->run_func = run_func;
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procedure->priv->run_data = run_data;
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procedure->priv->run_data_destroy = run_data_destroy;
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return PIKA_PROCEDURE (procedure);
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}
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