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