mirror of https://github.com/GNOME/gimp.git
103 lines
3.3 KiB
C
103 lines
3.3 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __TILE_PRIVATE_H__
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#define __TILE_PRIVATE_H__
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#include "config.h"
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#ifdef USE_PTHREADS
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#include <pthread.h>
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#endif
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#include <sys/types.h>
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#include <glib.h>
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typedef struct _TileLink TileLink;
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struct _TileLink
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{
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TileLink *next;
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gint tile_num; /* the number of this tile within the drawable */
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TileManager *tm; /* A pointer to the tile manager for this tile.
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* We need this in order to call the tile managers
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* validate proc whenever the tile is referenced
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* yet invalid.
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*/
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};
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struct _Tile
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{
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gshort ref_count; /* reference count. when the reference count is
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* non-zero then the "data" for this tile must
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* be valid. when the reference count for a tile
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* is 0 then the "data" for this tile must be
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* NULL.
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*/
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gshort write_count; /* write count: number of references that are
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for write access */
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gshort share_count; /* share count: number of tile managers that
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hold this tile */
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guint dirty : 1; /* is the tile dirty? has it been modified? */
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guint valid : 1; /* is the tile valid? */
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guchar bpp; /* the bytes per pixel (1, 2, 3 or 4) */
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gushort ewidth; /* the effective width of the tile */
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gushort eheight; /* the effective height of the tile
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* a tile's effective width and height may be smaller
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* (but not larger) than TILE_WIDTH and TILE_HEIGHT.
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* this is to handle edge tiles of a drawable.
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*/
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TileRowHint *rowhint; /* An array of hints for rendering purposes */
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guchar *data; /* the data for the tile. this may be NULL in which
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* case the tile data is on disk.
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*/
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gint swap_num; /* the index into the file table of the file to be used
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* for swapping. swap_num 1 is always the global
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* swap file.
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*/
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off_t swap_offset; /* the offset within the swap file of the tile data.
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* if the tile data is in memory this will be set to -1.
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*/
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TileLink *tlink;
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Tile *next;
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Tile *prev; /* List pointers for the tile cache lists */
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gpointer listhead; /* Pointer to the head of the list this tile is on */
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#ifdef USE_PTHREADS
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pthread_mutex_t mutex;
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#endif
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};
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#ifdef USE_PTHREADS
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#define TILE_MUTEX_LOCK(tile) pthread_mutex_lock(&((tile)->mutex))
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#define TILE_MUTEX_UNLOCK(tile) pthread_mutex_unlock(&((tile)->mutex))
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#else
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#define TILE_MUTEX_LOCK(tile) /* nothing */
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#define TILE_MUTEX_UNLOCK(tile) /* nothing */
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#endif
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#endif /* __TILE_PRIVATE_H__ */
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