[AS3] BitmapData.copyChannel()方法(二) - 將其它BitmapData物件的RGB三個色版，分別拷貝到本身RGB目標色版

BitmapData()建構函式
public function BitmapData(width:int, height:int, transparent:Boolean = true, fillColor:uint = 0xFFFFFFFF)

copyChannel()方法
public function copyChannel(sourceBitmapData:BitmapData, sourceRect:Rectangle, destPoint:Point, sourceChannel:uint, destChannel:uint):void

991211_BitmapData.copyChannel_2.swf

import flash.display.Loader;
import flash.net.URLRequest;
import flash.events.Event;
import flash.events.ProgressEvent;
import flash.display.BitmapData;
import flash.text.TextField;
import flash.text.TextFormat;
import flash.geom.Rectangle;
import flash.geom.Point;
import flash.display.Bitmap;

//
const bmURL:String = "991211_photo_1.jpg";
var ldr:Loader = new Loader();
ldr.load(new URLRequest(bmURL));
ldr.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoaderComplete);
ldr.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, onProgress);

//
var bmData1:BitmapData;
//0xffff0000 <---ARGB色彩,A為不透明度.
var bmData2:BitmapData = new BitmapData(360, 240, true, 0xffff0000);
var bm1:Bitmap;
var bm2:Bitmap;
//
var format:TextFormat = new TextFormat();
with(format){
 color = 0xff00ff;
 size = 88;
 font = "Lucida Fax";
 bold = true;
 align = "center";
}
//
var tF:TextField = new TextField;
with(tF){
 x = 0;
 y = 150;
 width = 550;
 //autoSize = TextFieldAutoSize.LEFT;
}
tF.defaultTextFormat = format;
addChild(tF);

//
function onProgress(e:ProgressEvent):void{
 tF.text = String(Math.floor((e.bytesLoaded/e.bytesTotal*100)));
}

//
var rect:Rectangle = new Rectangle(0,0, 550, 400);
var point:Point = new Point(0, 0);
//
function onLoaderComplete(e:Event):void{
 tF.text = "";
 gogo();
}
//copyChannel()方法  
//public function copyChannel(sourceBitmapData:BitmapData, sourceRect:Rectangle, destPoint:Point, sourceChannel:uint, destChannel:uint):void
//http://help.adobe.com/zh_TW/Flash/CS5/AS3LR/flash/display/BitmapData.html#copyChannel()
function gogo(){
 bmData1 = (ldr.content as Bitmap).bitmapData;
 bmData2.copyChannel(bmData1, rect, point, BitmapDataChannel.RED, BitmapDataChannel.RED);
 bmData2.copyChannel(bmData1, rect, point, BitmapDataChannel.GREEN, BitmapDataChannel.GREEN);
 bmData2.copyChannel(bmData1, rect, point, BitmapDataChannel.BLUE, BitmapDataChannel.BLUE);
 //bm1 = new Bitmap(bmData1);
 bm2 = new Bitmap(bmData2);
 bm2.x = 60;
 bm2.y = 60;
 //addChild(bm1);
 addChild(bm2);
}

991211_BitmapData.copyChannel_2a.swf - 拷貝紅藍兩個色版色版