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#include "tile.h"
#include "tile_cache.h"
#include "tile_manager.h"
#include "tile_swap.h"
void
tile_init (Tile *tile,
int bpp)
{
tile->ref_count = 0;
tile->dirty = FALSE;
tile->valid = FALSE;
tile->ewidth = TILE_WIDTH;
tile->eheight = TILE_HEIGHT;
tile->bpp = bpp;
tile->tile_num = -1;
tile->data = NULL;
tile->swap_num = 1;
tile->swap_offset = -1;
tile->tm = NULL;
}
int tile_ref_count = 0;
void
#if defined (TILE_DEBUG) && defined (__GNUC__)
_tile_ref (Tile *tile, char *func_name)
#else
tile_ref (Tile *tile)
#endif
{
/* g_print ("tile_ref: 0x%08x %s\n", tile, func_name); */
tile_ref_count += 1;
/* Increment the reference count.
*/
tile->ref_count += 1;
/* If this is the first reference to the tile then
* swap the tile data in from disk. Note: this will
* properly handle the case where the tile data isn't
* on disk.
*/
if (tile->ref_count == 1)
{
tile_swap_in (tile);
/* the tile must be clean */
tile->dirty = FALSE;
}
/* Insert the tile into the cache. If the tile is already
* in the cache this will have the affect of "touching"
* the tile.
*/
tile_cache_insert (tile);
/* Call 'tile_manager_validate' if the tile was invalid.
*/
if (!tile->valid)
tile_manager_validate ((TileManager*) tile->tm, tile);
}
void
#if defined (TILE_DEBUG) && defined (__GNUC__)
_tile_unref (Tile *tile, int dirty, char *func_name)
#else
tile_unref (Tile *tile, int dirty)
#endif
{
/* g_print ("tile_unref: 0x%08x %s\n", tile, func_name); */
tile_ref_count -= 1;
/* Decrement the reference count.
*/
tile->ref_count -= 1;
/* Mark the tile dirty if indicated
*/
tile->dirty |= dirty;
/* If this was the last reference to the tile, then
* swap it out to disk.
*/
if (tile->ref_count == 0)
{
/* Only need to swap out in two cases:
* 1) The tile is dirty
* 2) The tile has never been swapped
*/
if (tile->dirty || tile->swap_offset == -1)
tile_swap_out (tile);
/* Otherwise, just throw out the data--the same stuff is in swap
*/
else
{
g_free (tile->data);
tile->data = NULL;
}
}
}
void
tile_alloc (Tile *tile)
{
if (tile->data)
return;
/* Allocate the data for the tile.
*/
tile->data = g_new (guchar, tile_size (tile));
}
int
tile_size (Tile *tile)
{
/* Return the actual size of the tile data.
* (Based on its effective width and height).
*/
return tile->ewidth * tile->eheight * tile->bpp;
}
void
tile_invalidate (Tile *tile)
{
/* Invalidate the tile. (Must be valid first).
*/
if (tile->valid)
{
tile->valid = FALSE;
if (tile->data)
{
/* If the tile is in memory then trick the
* tile cache routines. We temporarily increment
* the reference count so that flushing a tile does
* not cause it to go out to disk.
*/
tile->ref_count += 1;
tile_cache_flush (tile);
tile->ref_count -= 1;
/* We then free the tile data.
*/
g_free (tile->data);
tile->data = NULL;
}
if (tile->swap_offset != -1)
{
/* If the tile is on disk, then delete its
* presence there.
*/
tile_swap_delete (tile);
}
}
}
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