mirror of https://github.com/GNOME/gimp.git
72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
#ifndef __TILE_PVT_H__
|
|
#define __TILE_PVT_H__
|
|
|
|
#ifdef USE_PTHREADS
|
|
#include <pthread.h>
|
|
#endif
|
|
|
|
|
|
#include <sys/types.h>
|
|
#include <glib.h>
|
|
|
|
#include "config.h"
|
|
|
|
struct _Tile
|
|
{
|
|
short 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.
|
|
*/
|
|
guint dirty : 1; /* is the tile dirty? has it been modified? */
|
|
guint valid : 1; /* is the tile valid? */
|
|
|
|
guchar *data; /* the data for the tile. this may be NULL in which
|
|
* case the tile data is on disk.
|
|
*/
|
|
|
|
Tile *real_tile_ptr;/* if this tile's 'data' pointer is just a copy-on-write
|
|
* mirror of another's, this is that source tile.
|
|
* (real_tile itself can actually be a virtual tile
|
|
* too.) This is NULL if this tile is not a virtual
|
|
* tile.
|
|
*/
|
|
Tile *mirrored_by; /* If another tile is mirroring this one, this is
|
|
* a pointer to that tile, otherwise this is NULL.
|
|
* Note that only one tile may be _directly_ mirroring
|
|
* another given tile. This ensures that the graph
|
|
* of mirrorings is no more complex than a linked
|
|
* list.
|
|
*/
|
|
|
|
int ewidth; /* the effective width of the tile */
|
|
int 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.
|
|
*/
|
|
int bpp; /* the bytes per pixel (1, 2, 3 or 4) */
|
|
int tile_num; /* the number of this tile within the drawable */
|
|
|
|
int 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.
|
|
*/
|
|
|
|
void *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.
|
|
*/
|
|
Tile *next;
|
|
Tile *prev; /* List pointers for the tile cache lists */
|
|
void *listhead; /* Pointer to the head of the list this tile is on */
|
|
#ifdef USE_PTHREADS
|
|
pthread_mutex_t mutex;
|
|
#endif
|
|
};
|
|
|
|
#endif /* __TILE_PVT_H__ */
|