自定义滤镜 ColorMatrixFilter

var url:URLRequest = new URLRequest("Koala.jpg");
var l:Loader = new Loader();
l.contentLoaderInfo.addEventListener(Event.COMPLETE,function():void{
                            exe();
});
l.load(url);
function exe():void{
    var d:Bitmap = l.content as Bitmap;
    addChild(d);
    var ar:Array = [// RedPassage         GreenPassage            BluePassage            PassageAlpha        RedPassageOffset
        1,0,0,0,0,  //RedCount * Val0       ReadCount*Val1         RedCount*Val2        RedAlpha*Val            -+ 255             RGBVal
        0,1,0,0,0,  //GreenCount*Val0     GreenCount*Val1       GreenCount*Val2     GreenAlpha*Val           -+ 255             RGBVal
        0,0,1,0,0,  //BC
        -1,0,0,1,0  //RedColorAlpha*Val       GCA*Val                BCA*Val                RCBCA*Val                ...
        ];

    var cf:ColorMatrixFilter = new ColorMatrixFilter(ar);
    d.filters = [cf];
}

//这里对颜色的所有操作  都是相对于像素点的值 0xARGB 来做的

如 1,0,0,0,10 RED

0x00 10 00 00

最后计算为 10*1+10