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```
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.

See Also:

WritableRenderedImage

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`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).

- Method Detail
  - tileUpdate
```
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).
    
    Parameters:
    
    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.