AS3得到图像的平均颜色

Posted 2021-02-25

The docs for the Sekati SWC are here: http://docs.sekati.com/sekati/sekati/utils/ColorUtil.html

Another useful blog post: http://blog.soulwire.co.uk/code/actionscript-3/extract-average-colours-from-bitmapdata

package 
{
	import flash.display.Bitmap;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.geom.ColorTransform;
 
	import sekati.utils.ColorUtil;
 
	public class Main extends Sprite 
	{
 
		[Embed(source="../assets/hero.jpg")]
		private var StillImage:Class;
 
 
		public function Main():void 
		{
			if (stage) init();
			else addEventListener(Event.ADDED_TO_STAGE, init);
		}
 
		private function init(e:Event = null):void 
		{
			removeEventListener(Event.ADDED_TO_STAGE, init);
 
			var image:Bitmap = new StillImage();
			addChild(image);
 
			var swatch:Sprite = new Sprite();
			swatch.graphics.beginFill(0xFF0000);
			swatch.graphics.drawRect(0, 0, image.width, 40);
			swatch.graphics.endFill();
			swatch.x = image.x;
			swatch.y = image.y + image.height;
			addChild(swatch);
 
			var averageRed:int = ColorUtil.averageRed(image);
			var averageGreen:int = ColorUtil.averageGreen(image);
			var averageBlue:int = ColorUtil.averageBlue(image);
 
			var colour:uint = averageRed << 16 | averageGreen << 8 | averageBlue;
 
			trace(averageRed + ", " + averageGreen + ", " + averageBlue);
 
			var ct:ColorTransform = new ColorTransform();
			ct.color = (colour);
			swatch.transform.colorTransform = ct;
 
			var hexColour:String = "#" + colour.toString(16).toUpperCase();
			trace("hexColour: "+hexColour);
 
		}
 
	}
 
}