gimp/app/layer.h

155 lines
5.3 KiB
C

/* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __LAYER_H__
#define __LAYER_H__
#include "boundary.h"
#include "channel.h"
#include "temp_buf.h"
#include "tile_manager.h"
#define APPLY 0
#define DISCARD 1
typedef enum
{
WhiteMask,
BlackMask,
AlphaMask
} AddMaskType;
/* structure declarations */
typedef struct _Layer Layer;
struct _Layer
{
char * name; /* name of the layer */
TileManager * tiles; /* Tiles for layer data */
int visible; /* controls visibility */
int linked; /* control linkage */
int preserve_trans; /* preserve transparency? */
Channel * mask; /* possible layer mask */
int apply_mask; /* controls mask application */
int edit_mask; /* edit mask or layer? */
int show_mask; /* show mask or layer? */
int offset_x, offset_y; /* offset of layer in image */
int type; /* type of image */
int width, height; /* size of layer */
int bytes; /* bytes per pixel */
int opacity; /* layer opacity */
int mode; /* layer combination mode */
int dirty; /* dirty bit */
int ID; /* provides a unique ID */
int gimage_ID; /* ID of gimage owner */
/* Preview variables */
TempBuf *preview; /* preview of the channel */
int preview_valid; /* is the preview valid? */
/* Floating selections */
struct
{
TileManager *backing_store; /* for obscured regions */
int drawable; /* floating sel is attached to */
int initial; /* is fs composited yet? */
int boundary_known; /* is the current boundary valid*/
BoundSeg *segs; /* boundary of floating sel */
int num_segs; /* number of segs in boundary */
} fs;
};
/* Special undo types */
typedef struct _layer_undo LayerUndo;
struct _layer_undo
{
Layer * layer; /* the actual layer */
int prev_position; /* former position in list */
int prev_layer; /* previous active layer */
int undo_type; /* is this a new layer undo */
/* or a remove layer undo? */
};
typedef struct _layer_mask_undo LayerMaskUndo;
struct _layer_mask_undo
{
Layer * layer; /* the layer */
int apply_mask; /* apply mask? */
int edit_mask; /* edit mask or layer? */
int show_mask; /* show the mask? */
Channel *mask; /* the layer mask */
int mode; /* the application mode */
int undo_type; /* is this a new layer mask */
/* or a remove layer mask */
};
typedef struct _fs_to_layer_undo FStoLayerUndo;
struct _fs_to_layer_undo
{
Layer * layer; /* the layer */
int drawable; /* drawable of floating sel */
};
/* function declarations */
void layer_allocate (Layer *, int, int, int);
void layer_deallocate (Layer *);
Layer * layer_new (int, int, int, int, char *, int, int);
Layer * layer_copy (Layer *, int);
Layer * layer_from_tiles (void *, int, TileManager *, char *, int, int);
Channel * layer_add_mask (Layer *, int);
Channel * layer_create_mask (Layer *, AddMaskType);
Layer * layer_get_ID (int);
void layer_delete (Layer *);
void layer_apply_mask (Layer *, int);
void layer_translate (Layer *, int, int);
void layer_apply_image (Layer *, int, int, int, int, TileManager *, int);
void layer_add_alpha (Layer *);
void layer_scale (Layer *, int, int, int);
void layer_resize (Layer *, int, int, int, int);
BoundSeg * layer_boundary (Layer *, int *);
void layer_invalidate_boundary (Layer *);
int layer_pick_correlate (Layer *, int, int);
/* access functions */
unsigned char * layer_data (Layer *);
Channel * layer_mask (Layer *);
int layer_has_alpha (Layer *);
int layer_is_floating_sel (Layer *);
TempBuf * layer_preview (Layer *, int, int);
TempBuf * layer_mask_preview (Layer *, int, int);
void layer_invalidate_previews (int);
#endif /* __LAYER_H__ */