delegate.clearRect( x, y, width, height );
Color color = delegate.getColor(); delegate.setColor( TRANSPARENT ); Composite composite = delegate.getComposite(); delegate.setComposite( AlphaComposite.Clear ); delegate.fillRect( x, y, width, height ); delegate.setComposite( composite ); delegate.setColor( color );
    public void clearRect( int x, int y, int width, int height ) {        if ( mipMapChild != null ) {            mipMapChild.clearRect( x, y, width, height );        }        synchronized ( dirty ) {            makeDirty( x, y, width, height );            delegate.clearRect( x, y, width, height );        }    }