/* GIMP - The GNU Image Manipulation Program
 *
 * gimpcagetool.h
 * Copyright (C) 2010 Michael Muré <batolettre@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __GIMP_CAGE_TOOL_H__
#define __GIMP_CAGE_TOOL_H__


#include "gimpdrawtool.h"


#define GIMP_TYPE_CAGE_TOOL            (gimp_cage_tool_get_type ())
#define GIMP_CAGE_TOOL(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CAGE_TOOL, GimpCageTool))
#define GIMP_CAGE_TOOL_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CAGE_TOOL, GimpCageToolClass))
#define GIMP_IS_CAGE_TOOL(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CAGE_TOOL))
#define GIMP_IS_CAGE_TOOL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CAGE_TOOL))
#define GIMP_CAGE_TOOL_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CAGE_TOOL, GimpCageToolClass))

#define GIMP_CAGE_TOOL_GET_OPTIONS(t)  (GIMP_CAGE_OPTIONS (gimp_tool_get_options (GIMP_TOOL (t))))


typedef struct _GimpCageTool      GimpCageTool;
typedef struct _GimpCageToolClass GimpCageToolClass;

struct _GimpCageTool
{
  GimpDrawTool    parent_instance;

  GimpCageConfig *config;

  gint            offset_x; /* used to convert the cage point coords */
  gint            offset_y; /* to drawable coords */

  gdouble         cursor_x; /* Hold the cursor x position */
  gdouble         cursor_y; /* Hold the cursor y position */

  gdouble         movement_start_x; /* Where the movement started */
  gdouble         movement_start_y; /* Where the movement started */

  gdouble         selection_start_x; /* Where the selection started */
  gdouble         selection_start_y; /* Where the selection started */

  gint            hovering_handle; /* Handle which the cursor is above */
  gint            hovering_edge; /* Edge which the cursor is above */

  GeglBuffer     *coef; /* Gegl buffer where the coefficient of the transformation are stored */
  gboolean        dirty_coef; /* Indicate if the coef are still valid */

  GeglNode       *render_node; /* Gegl node graph to render the transformation */
  GeglNode       *cage_node; /* Gegl node that compute the cage transform */
  GeglNode       *coef_node; /* Gegl node that read in the coef buffer */

  gint            tool_state; /* Current state in statemachine */

  GimpDrawableFilter *filter; /* For preview */
};

struct _GimpCageToolClass
{
  GimpDrawToolClass parent_class;
};


void    gimp_cage_tool_register (GimpToolRegisterCallback  callback,
                                 gpointer                  data);

GType   gimp_cage_tool_get_type (void) G_GNUC_CONST;


#endif  /*  __GIMP_CAGE_TOOL_H__  */
