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/* 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 __CHANNEL_H__
#define __CHANNEL_H__
#include "drawable.h"
#include "boundary.h"
#include "temp_buf.h"
#include "tile_manager.h"
/* OPERATIONS */
#define ADD 0
#define SUB 1
#define REPLACE 2
#define INTERSECT 3
/* Half way point where a region is no longer visible in a selection */
#define HALF_WAY 127
/* structure declarations */
#define GIMP_CHANNEL(obj) GTK_CHECK_CAST (obj, gimp_channel_get_type (), GimpChannel)
#define GIMP_CHANNEL_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, gimp_channel_get_type(), GimpChannelClass)
#define GIMP_IS_CHANNEL(obj) GTK_CHECK_TYPE (obj, gimp_channel_get_type())
typedef struct _GimpChannel GimpChannel;
typedef struct _GimpChannelClass GimpChannelClass;
typedef GimpChannel Channel; /* convenience */
guint gimp_channel_get_type (void);
/* Special undo type */
typedef struct _channel_undo ChannelUndo;
struct _channel_undo
{
Channel * channel; /* the actual channel */
int prev_position; /* former position in list */
Channel * prev_channel; /* previous active channel */
int undo_type; /* is this a new channel undo */
/* or a remove channel undo? */
};
/* Special undo type */
typedef struct _mask_undo MaskUndo;
struct _mask_undo
{
TileManager * tiles; /* the actual mask */
int x, y; /* offsets */
};
/* function declarations */
Channel * channel_new (int, int, int, char *, int, unsigned char *);
Channel * channel_copy (Channel *);
Channel * channel_ref (Channel *);
void channel_unref (Channel *);
Channel * channel_get_ID (int);
void channel_delete (Channel *);
void channel_scale (Channel *, int, int);
void channel_resize (Channel *, int, int, int, int);
/* access functions */
unsigned char * channel_data (Channel *);
int channel_toggle_visibility (Channel *);
TempBuf * channel_preview (Channel *, int, int);
void channel_invalidate_previews (int);
/* selection mask functions */
Channel * channel_new_mask (int, int, int);
int channel_boundary (Channel *, BoundSeg **, BoundSeg **,
int *, int *, int, int, int, int);
int channel_bounds (Channel *, int *, int *, int *, int *);
int channel_value (Channel *, int, int);
int channel_is_empty (Channel *);
void channel_add_segment (Channel *, int, int, int, int);
void channel_sub_segment (Channel *, int, int, int, int);
void channel_inter_segment (Channel *, int, int, int, int);
void channel_combine_rect (Channel *, int, int, int, int, int);
void channel_combine_ellipse (Channel *, int, int, int, int, int, int);
void channel_combine_mask (Channel *, Channel *, int, int, int);
void channel_feather (Channel *, Channel *, double, int, int, int);
void channel_push_undo (Channel *);
void channel_clear (Channel *);
void channel_invert (Channel *);
void channel_sharpen (Channel *);
void channel_all (Channel *);
void channel_border (Channel *, int);
void channel_grow (Channel *, int);
void channel_shrink (Channel *, int);
void channel_translate (Channel *, int, int);
void channel_load (Channel *, Channel *);
void channel_invalidate_bounds (Channel *);
extern int channel_get_count;
/* from drawable.c */
Channel * drawable_channel (GimpDrawable *);
#endif /* __CHANNEL_H__ */
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