mirror of https://github.com/GNOME/gimp.git
148 lines
5.8 KiB
C
148 lines
5.8 KiB
C
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/* 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 __CHANNEL_H__
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#define __CHANNEL_H__
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#include "boundary.h"
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#include "temp_buf.h"
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#include "tile_manager.h"
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/* OPERATIONS */
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#define ADD 0
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#define SUB 1
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#define REPLACE 2
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#define INTERSECT 3
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/* Half way point where a region is no longer visible in a selection */
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#define HALF_WAY 127
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/* structure declarations */
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typedef struct _Channel Channel;
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struct _Channel
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{
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char * name; /* name of the channel */
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TileManager *tiles; /* tiles for channel data */
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int visible; /* controls visibility */
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int width, height; /* size of channel */
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int bytes; /* bytes per pixel */
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unsigned char col[3]; /* RGB triplet for channel color*/
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int opacity; /* Channel opacity */
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int show_masked; /* Show masked areas--as */
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/* opposed to selected areas */
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int dirty; /* dirty bit */
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int ID; /* provides a unique ID */
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int layer_ID; /* ID of layer-if a layer mask */
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int gimage_ID; /* ID of gimage owner */
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/* Selection mask variables */
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int boundary_known; /* is the current boundary valid*/
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BoundSeg *segs_in; /* outline of selected region */
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BoundSeg *segs_out; /* outline of selected region */
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int num_segs_in; /* number of lines in boundary */
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int num_segs_out; /* number of lines in boundary */
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int empty; /* is the region empty? */
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int bounds_known; /* recalculate the bounds? */
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int x1, y1; /* coordinates for bounding box */
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int x2, y2; /* lower right hand coordinate */
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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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};
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/* Special undo type */
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typedef struct _channel_undo ChannelUndo;
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struct _channel_undo
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{
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Channel * channel; /* the actual channel */
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int prev_position; /* former position in list */
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int prev_channel; /* previous active channel */
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int undo_type; /* is this a new channel undo */
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/* or a remove channel undo? */
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};
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/* Special undo type */
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typedef struct _mask_undo MaskUndo;
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struct _mask_undo
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{
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TileManager * tiles; /* the actual mask */
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int x, y; /* offsets */
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};
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/* function declarations */
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void channel_allocate (Channel *, int, int);
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void channel_deallocate (Channel *);
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Channel * channel_new (int, int, int, char *, int, unsigned char *);
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Channel * channel_copy (Channel *);
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Channel * channel_get_ID (int);
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void channel_delete (Channel *);
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void channel_apply_image (Channel *, int, int, int, int, TileManager *, int);
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void channel_scale (Channel *, int, int);
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void channel_resize (Channel *, int, int, int, int);
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/* access functions */
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unsigned char * channel_data (Channel *);
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int channel_toggle_visibility (Channel *);
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TempBuf * channel_preview (Channel *, int, int);
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void channel_invalidate_previews (int);
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/* selection mask functions */
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Channel * channel_new_mask (int, int, int);
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int channel_boundary (Channel *, BoundSeg **, BoundSeg **,
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int *, int *, int, int, int, int);
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int channel_bounds (Channel *, int *, int *, int *, int *);
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int channel_value (Channel *, int, int);
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int channel_is_empty (Channel *);
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void channel_add_segment (Channel *, int, int, int, int);
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void channel_sub_segment (Channel *, int, int, int, int);
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void channel_inter_segment (Channel *, int, int, int, int);
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void channel_combine_rect (Channel *, int, int, int, int, int);
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void channel_combine_ellipse (Channel *, int, int, int, int, int, int);
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void channel_combine_mask (Channel *, Channel *, int, int, int);
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void channel_feather (Channel *, Channel *, double, int, int, int);
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void channel_push_undo (Channel *);
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void channel_clear (Channel *);
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void channel_invert (Channel *);
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void channel_sharpen (Channel *);
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void channel_all (Channel *);
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void channel_border (Channel *, int);
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void channel_grow (Channel *, int);
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void channel_shrink (Channel *, int);
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void channel_translate (Channel *, int, int);
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void channel_layer_alpha (Channel *, int);
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void channel_layer_mask (Channel *, int);
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void channel_load (Channel *, Channel *);
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#endif /* __CHANNEL_H__ */
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