/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifndef __GIMP_CANVAS_H__
#define __GIMP_CANVAS_H__


#include <gtk/gtkdrawingarea.h>


typedef enum
{
  GIMP_CANVAS_STYLE_BLACK,
  GIMP_CANVAS_STYLE_WHITE,
  GIMP_CANVAS_STYLE_RENDER,
  GIMP_CANVAS_STYLE_XOR,
  GIMP_CANVAS_STYLE_XOR_DASHED,
  GIMP_CANVAS_STYLE_XOR_DOTTED,
  GIMP_CANVAS_STYLE_SELECTION_IN,
  GIMP_CANVAS_STYLE_SELECTION_OUT,
  GIMP_CANVAS_STYLE_LAYER_BOUNDARY,
  GIMP_CANVAS_STYLE_GUIDE_NORMAL,
  GIMP_CANVAS_STYLE_GUIDE_ACTIVE,
  GIMP_CANVAS_STYLE_SAMPLE_POINT_NORMAL,
  GIMP_CANVAS_STYLE_SAMPLE_POINT_ACTIVE,
  GIMP_CANVAS_STYLE_CUSTOM,
  GIMP_CANVAS_NUM_STYLES
} GimpCanvasStyle;


#define GIMP_CANVAS_NUM_STIPPLES  8


#define GIMP_TYPE_CANVAS            (gimp_canvas_get_type ())
#define GIMP_CANVAS(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CANVAS, GimpCanvas))
#define GIMP_CANVAS_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CANVAS, GimpCanvasClass))
#define GIMP_IS_CANVAS(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CANVAS))
#define GIMP_IS_CANVAS_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CANVAS))
#define GIMP_CANVAS_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CANVAS, GimpCanvasClass))


typedef struct _GimpCanvasClass GimpCanvasClass;

struct _GimpCanvas
{
  GtkDrawingArea  parent_instance;

  GdkGC          *gc[GIMP_CANVAS_NUM_STYLES];
  GdkBitmap      *stipple[GIMP_CANVAS_NUM_STIPPLES];
  PangoLayout    *layout;
};

struct _GimpCanvasClass
{
  GtkDrawingAreaClass  parent_class;
};


GType        gimp_canvas_get_type          (void) G_GNUC_CONST;

GtkWidget  * gimp_canvas_new               (void);

void         gimp_canvas_draw_cursor       (GimpCanvas      *canvas,
                                            gint             x,
                                            gint             y);
void         gimp_canvas_draw_point        (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            gint             x,
                                            gint             y);
void         gimp_canvas_draw_points       (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            GdkPoint        *points,
                                            gint             num_points);
void         gimp_canvas_draw_line         (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            gint             x1,
                                            gint             y1,
                                            gint             x2,
                                            gint             y2);
void         gimp_canvas_draw_lines        (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            GdkPoint        *points,
                                            gint             num_points);
void         gimp_canvas_draw_rectangle    (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            gboolean         filled,
                                            gint             x,
                                            gint             y,
                                            gint             width,
                                            gint             height);
void         gimp_canvas_draw_arc          (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            gboolean         filled,
                                            gint             x,
                                            gint             y,
                                            gint             width,
                                            gint             height,
                                            gint             angle1,
                                            gint             angle2);
void         gimp_canvas_draw_polygon      (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            gboolean         filled,
                                            GdkPoint        *points,
                                            gint             num_points);
void         gimp_canvas_draw_segments     (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            GdkSegment      *segments,
                                            gint             num_segments);
void         gimp_canvas_draw_text         (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            gint             x,
                                            gint             y,
                                            const gchar     *format,
                                            ...) G_GNUC_PRINTF (5, 6);
void         gimp_canvas_draw_rgb          (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            gint             x,
                                            gint             y,
                                            gint             width,
                                            gint             height,
                                            guchar          *rgb_buf,
                                            gint             rowstride,
                                            gint             xdith,
                                            gint             ydith);

void         gimp_canvas_set_clip_rect     (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            GdkRectangle    *rect);
void         gimp_canvas_set_clip_region   (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            GdkRegion       *region);
void         gimp_canvas_set_stipple_index (GimpCanvas      *canvas,
                                            GimpCanvasStyle  style,
                                            guint            index);
void         gimp_canvas_set_custom_gc     (GimpCanvas      *canvas,
                                            GdkGC           *gc);
void         gimp_canvas_set_bg_color      (GimpCanvas      *canvas,
                                            GimpRGB         *color);


#endif /*  __GIMP_CANVAS_H__  */