mirror of https://github.com/GNOME/gimp.git
155 lines
5.3 KiB
C
155 lines
5.3 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __LAYER_H__
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#define __LAYER_H__
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#include "boundary.h"
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#include "channel.h"
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#include "temp_buf.h"
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#include "tile_manager.h"
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#define APPLY 0
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#define DISCARD 1
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typedef enum
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{
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WhiteMask,
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BlackMask,
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AlphaMask
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} AddMaskType;
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/* structure declarations */
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typedef struct _Layer Layer;
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struct _Layer
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{
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char * name; /* name of the layer */
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TileManager * tiles; /* Tiles for layer data */
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int visible; /* controls visibility */
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int linked; /* control linkage */
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int preserve_trans; /* preserve transparency? */
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Channel * mask; /* possible layer mask */
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int apply_mask; /* controls mask application */
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int edit_mask; /* edit mask or layer? */
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int show_mask; /* show mask or layer? */
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int offset_x, offset_y; /* offset of layer in image */
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int type; /* type of image */
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int width, height; /* size of layer */
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int bytes; /* bytes per pixel */
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int opacity; /* layer opacity */
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int mode; /* layer combination mode */
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int dirty; /* dirty bit */
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int ID; /* provides a unique ID */
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int gimage_ID; /* ID of gimage owner */
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/* Preview variables */
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TempBuf *preview; /* preview of the channel */
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int preview_valid; /* is the preview valid? */
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/* Floating selections */
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struct
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{
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TileManager *backing_store; /* for obscured regions */
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int drawable; /* floating sel is attached to */
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int initial; /* is fs composited yet? */
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int boundary_known; /* is the current boundary valid*/
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BoundSeg *segs; /* boundary of floating sel */
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int num_segs; /* number of segs in boundary */
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} fs;
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};
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/* Special undo types */
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typedef struct _layer_undo LayerUndo;
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struct _layer_undo
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{
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Layer * layer; /* the actual layer */
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int prev_position; /* former position in list */
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int prev_layer; /* previous active layer */
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int undo_type; /* is this a new layer undo */
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/* or a remove layer undo? */
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};
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typedef struct _layer_mask_undo LayerMaskUndo;
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struct _layer_mask_undo
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{
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Layer * layer; /* the layer */
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int apply_mask; /* apply mask? */
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int edit_mask; /* edit mask or layer? */
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int show_mask; /* show the mask? */
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Channel *mask; /* the layer mask */
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int mode; /* the application mode */
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int undo_type; /* is this a new layer mask */
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/* or a remove layer mask */
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};
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typedef struct _fs_to_layer_undo FStoLayerUndo;
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struct _fs_to_layer_undo
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{
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Layer * layer; /* the layer */
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int drawable; /* drawable of floating sel */
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};
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/* function declarations */
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void layer_allocate (Layer *, int, int, int);
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void layer_deallocate (Layer *);
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Layer * layer_new (int, int, int, int, char *, int, int);
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Layer * layer_copy (Layer *, int);
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Layer * layer_from_tiles (void *, int, TileManager *, char *, int, int);
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Channel * layer_add_mask (Layer *, int);
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Channel * layer_create_mask (Layer *, AddMaskType);
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Layer * layer_get_ID (int);
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void layer_delete (Layer *);
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void layer_apply_mask (Layer *, int);
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void layer_translate (Layer *, int, int);
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void layer_apply_image (Layer *, int, int, int, int, TileManager *, int);
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void layer_add_alpha (Layer *);
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void layer_scale (Layer *, int, int, int);
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void layer_resize (Layer *, int, int, int, int);
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BoundSeg * layer_boundary (Layer *, int *);
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void layer_invalidate_boundary (Layer *);
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int layer_pick_correlate (Layer *, int, int);
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/* access functions */
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unsigned char * layer_data (Layer *);
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Channel * layer_mask (Layer *);
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int layer_has_alpha (Layer *);
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int layer_is_floating_sel (Layer *);
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TempBuf * layer_preview (Layer *, int, int);
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TempBuf * layer_mask_preview (Layer *, int, int);
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void layer_invalidate_previews (int);
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#endif /* __LAYER_H__ */
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