package starling.filters {
/**
 *  An enumeration class with the available modes that are offered by the CompositeFilter
 *  *  to draw layers on top of each other.
 *  *
 *  *  @see starling.filters.CompositeFilter
 *  
 * @externs
 */
public class CompositeMode {
	/**
	 *  Draw layer on top of destination. Corresponds to BlendMode.NORMAL.
	 * 	 *  <code>src + dst × (1 - src.alpha)</code> 
	 */
	public static const NORMAL:String = "normal";
	/**
	 *  Draw layer on top of the destination using the destination's alpha value.
	 * 	 *  <code>src × dst.alpha + dst × (1 - src.alpha)</code> 
	 */
	public static const INSIDE:String = "inside";
	/**
	 *  Draw layer on top of the destination, using the destination's inverted alpha value.
	 * 	 *  <code>src × (1 - dst.alpha) + dst</code> 
	 */
	public static const OUTSIDE:String = "outside";
	/**
	 *  Draw only the new layer (erasing the old), using the destination's alpha value.
	 * 	 *  <code>src × dst.alpha</code> 
	 */
	public static const INSIDE_KNOCKOUT:String = "insideKnockout";
	/**
	 *  Draw only the new layer (erasing the old), using the destination's inverted alpha value.
	 * 	 *  <code>src × (1 - dst.alpha)</code> 
	 */
	public static const OUTSIDE_KNOCKOUT:String = "outsideKnockout";
	/**
	 *  Returns a different integer for each mode. 
	 */
	public static function getIndex(mode:String):int { return 0; }
}
}