public interface TileObserver
An interface for objects that wish to be informed when tiles of a WritableRenderedImage become modifiable by some writer via a call to getWritableTile, and when they become unmodifiable via the last call to releaseWritableTile.
void tileUpdate(WritableRenderedImage source, int tileX, int tileY, boolean willBeWritable)
A tile is about to be updated (it is either about to be grabbed for writing, or it is being released from writing).
source- the image that owns the tile.
tileX- the X index of the tile that is being updated.
tileY- the Y index of the tile that is being updated.
willBeWritable- If true, the tile will be grabbed for writing; otherwise it is being released.
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