/* This file is an image processing operation for GEGL

 *

 * GEGL is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 3 of the License, or (at your option) any later version.

 *

 * GEGL 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with GEGL; if not, see <http://www.gnu.org/licenses/>.

 *

 * Copyright 2006 Øyvind Kolås <pippin@gimp.org>

 */

#include "config.h"

#include <stdlib.h>

#include <glib/gi18n-lib.h>

#ifdef GEGL_CHANT_PROPERTIES

gegl_chant_file_path (path, _("File"), "/tmp/gegl-logo.svg", _("Path of file to load."))

#else

#define GEGL_CHANT_TYPE_SOURCE

#define GEGL_CHANT_C_FILE       "magick-load.c"

#include "gegl-chant.h"

#include <stdio.h>

static void

load_cache (GeglChantO *op_magick_load)

{

  if (!op_magick_load->chant_data)

    {

      gchar    *filename;

      gchar    *cmd;

      GeglNode *graph, *sink;

      GeglBuffer *newbuf = NULL;

      /* ImageMagick backed fallback FIXME: make this robust.

       * maybe use pipes in a manner similar to the raw loader,

       * or at least use a properly unique filename  */

      filename = g_build_filename (g_get_tmp_dir (), "gegl-magick.png", NULL);

      cmd = g_strdup_printf ("convert \"%s\"'[0]' \"%s\"",

                             op_magick_load->path, filename);

      if (system (cmd) == -1)

        g_warning ("Error executing ImageMagick convert program");

      graph = gegl_graph (sink=gegl_node ("gegl:buffer-sink", "buffer", &newbuf, NULL,

                                          gegl_node ("gegl:png-load", "path", filename, NULL)));

      gegl_node_process (sink);

      op_magick_load->chant_data = (gpointer) newbuf;

      g_object_unref (graph);

      g_free (cmd);

      g_free (filename);

    }

}

static GeglRectangle

get_bounding_box (GeglOperation *operation)

{

  GeglRectangle result = {0,0,0,0};

  GeglChantO   *o = GEGL_CHANT_PROPERTIES (operation);

  gint width, height;

  load_cache (o);

  g_object_get (o->chant_data, "width", &width,

                               "height", &height, NULL);

  result.width  = width;

  result.height = height;

  return result;

}

static GeglRectangle

get_cached_region (GeglOperation *operation,

                   const GeglRectangle *roi)

{

  return get_bounding_box (operation);

}

static gboolean

process (GeglOperation         *operation,

         GeglOperationContext  *context,

         const gchar           *output_pad,

         const GeglRectangle   *result,

         gint                   level)

{

  GeglChantO *o = GEGL_CHANT_PROPERTIES (operation);

  if (!o->chant_data)

    return FALSE;

  /* overriding the predefined behavior */

  g_object_ref (o->chant_data);

  gegl_operation_context_take_object (context, "output", G_OBJECT (o->chant_data));

  return  TRUE;

}

static void finalize (GObject *object)

{

  GeglOperation *op = (void*) object;

  GeglChantO *o = GEGL_CHANT_PROPERTIES (op);

  if (o->chant_data)

    g_object_unref (o->chant_data);

  o->chant_data = NULL;

  G_OBJECT_CLASS (gegl_chant_parent_class)->finalize (object);

}

static void

gegl_chant_class_init (GeglChantClass *klass)

{

  GeglOperationClass       *operation_class;

  GObjectClass             *object_class;

  operation_class = GEGL_OPERATION_CLASS (klass);

  object_class    = G_OBJECT_CLASS (klass);

  object_class->finalize = finalize;

  operation_class->process = process;

  operation_class->get_bounding_box = get_bounding_box;

  operation_class->get_cached_region = get_cached_region;;

  operation_class->no_cache = FALSE;

  gegl_operation_class_set_keys (operation_class,

        "name"       , "gegl:magick-load",

        "categories" , "hidden",

        "description",

        _("Image Magick wrapper using the png op."),

        NULL);

}

#endif