static void
gimp_projection_validate_tile (TileManager *tm,
Tile *tile,
GimpProjection *proj)
{
Tile *additional[7];
gint n_additional = 0;
gint x, y;
gint width, height;
gint tile_width, tile_height;
gint col, row;
gint i;
/* Find the coordinates of this tile */
tile_manager_get_tile_coordinates (tm, tile, &x, &y);
width = tile_width = tile_ewidth (tile);
height = tile_height = tile_eheight (tile);
tile_manager_get_tile_col_row (tm, tile, &col, &row);
/* try to validate up to 8 invalid tiles in a row */
while (tile_width == TILE_WIDTH && n_additional < 7)
{
Tile *t;
col++;
/* get the next tile without any read or write access, so it
* won't be locked (and validated)
*/
t = tile_manager_get_at (tm, col, row, FALSE, FALSE);
/* if we hit the right border, or a valid tile, bail out
*/
if (! t || tile_is_valid (t))
break;
/* HACK: mark the tile as valid, so locking it with r/w access
* won't validate it
*/
t->valid = TRUE;
t = tile_manager_get_at (tm, col, row, TRUE, TRUE);
/* add the tile's width to the chunk to validate */
tile_width = tile_ewidth (t);
width += tile_width;
additional[n_additional++] = t;
}
gimp_projection_construct (proj, x, y, width, height);
for (i = 0; i < n_additional; i++)
{
/* HACK: mark the tile as valid, because we know it is */
additional[i]->valid = TRUE;
tile_release (additional[i], TRUE);
}
}
static void
tile_pyramid_validate_tile (TileManager *tm,
Tile *tile,
TileManager *tm_below)
{
gint tile_col;
gint tile_row;
gint i, j;
tile_manager_get_tile_col_row (tm, tile, &tile_col, &tile_row);
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
{
Tile *source = tile_manager_get_at (tm_below,
tile_col * 2 + i,
tile_row * 2 + j,
TRUE, FALSE);
if (source)
{
tile_pyramid_write_quarter (tile, source, i, j);
tile_release (source, FALSE);
}
}
}