AS3有关颜色计算

获取透明度： 
var t:uint=0×77ff8877;
var s:uint=0xff000000;
var h:uint=t&s;
var m:uint=h>>>24;
trace(m);

 

取色： 
red = color24 >> 16;
green = color24 >> 8 & 0xFF;
blue = color24 & 0xFF;
alpha = color32 >> 24;
red = color32 >> 16 & 0xFF;
green = color32 >> 8 & 0xFF;
blue = color232 & 0xFF;

 

按位计算得到颜色值:
color24 = red << 16 | green << 8 | blue;
color32 = alpha << 24 | red << 16 | green << 8 | blue;