틴트 먹이는 메서드

//code start

	private static var r_lum:Number = 0.212671;
	private static var g_lum:Number = 0.715160;
	private static var b_lum:Number = 0.072169;


/**
	 * 틴트 먹이는 메서드 - 4.0.15에서 filters 를 지원 안 함.
	 * RGB to Luminance conversion constants as found on
     * Charles A. Poynton's colorspace-faq:
     * http://www.faqs.org/faqs/graphics/colorspace-faq/
	 * @param	rgb
	 * @param	amount
	 * @see http://developer.longtailvideo.com/trac/browser/trunk/as3/com/anttikupila/revolt/effects/Tint.as?rev=161
	 * @return
	 */
    private function tint(rgb:Number, amount:Number):Array {
		var r:Number = ( ( rgb >> 16 ) & 0xff ) / 255;
		var g:Number = ( ( rgb >> 8  ) & 0xff ) / 255;
		var b:Number = (   rgb         & 0xff ) / 255;
		var colorMatrix:Array;
		var filter:ColorMatrixFilter;
		
		if (amount==0 ) {
		colorMatrix =  [
		1, 0, 0, 0, 0,
		0, 1, 0, 0, 0,
		0, 0, 1, 0, 0,
		0, 0, 0, 1, 0];
		filter = new ColorMatrixFilter(colorMatrix);
		this.filters = [filter];
		return;
		
		}
		if (!amount) amount = 1;
		var inv_amount:Number = 1 - amount;
		

		colorMatrix =  [
		inv_amount + amount*r*r_lum, amount*r*g_lum,  amount*r*b_lum, 0, 0,
		amount*g*r_lum, inv_amount + amount*g*g_lum, amount*g*b_lum, 0, 0,
		amount*b*r_lum,amount*b*g_lum, inv_amount + amount*b*b_lum, 0, 0,
		0 , 0 , 0 , 1, 0];
		
		filter = new ColorMatrixFilter(colorMatrix);
		this.filters = [filter];

		return colorMatrix;
   
	}
//code end