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package sun.awt;

Interface used by Swing to make copies from the Swing back buffer
more optimal when using BufferStrategy; no need to copy the entire
buffer when only a small sub-region has changed.
See Also:
BufferStrategyPaintManager/**
 * Interface used by Swing to make copies from the Swing back buffer
 * more optimal when using BufferStrategy; no need to copy the entire
 * buffer when only a small sub-region has changed.
 * @see javax.swing.BufferStrategyPaintManager
 *
 */
public interface SubRegionShowable {
    
Shows the specific subregion.
/**
     * Shows the specific subregion.
     */
    public void show(int x1, int y1, int x2, int y2);

    
Shows the specified region if the buffer is not lost and the dimensions
of the back-buffer match those of the component.
Returns:
true if successful/**
     * Shows the specified region if the buffer is not lost and the dimensions
     * of the back-buffer match those of the component.
     *
     * @return true if successful
     */
    // NOTE: this is invoked by swing on the toolkit thread!
    public boolean showIfNotLost(int x1, int y1, int x2, int y2);
}