Method shade

src/com/cloudream/ishow/algorithm/Effect.java:154–157

http://stackoverflow.com/questions/6615002/given-an-rgb-value-how-do-i-create-a-tint-or-shade A shade is produced by "darkening" a hue or "adding black", to shade: R' = R (1 - shade_factor) G' = G (1 - shade_factor) B' = B (1 - shade_factor) @param bitmap @param color @param amount

(Bitmap bitmap, float amount)

	 * @param amount
	 */
	public static Bitmap shade(Bitmap bitmap, float amount)
	{
		return tone(bitmap, Color.BLACK, amount);
	}
	
	/**
	 * A tint is produced by "lightening" a hue or "adding white", to tint: