[ActionScript3.0]通过BitmapData将对象保存成jpg图片

1 package
2 {
3 import JPEGEncoder.JPGEncoder;
4 import flash.display.Bitmap;
5 import flash.display.BitmapData;
6 import flash.display.Loader;
7 import flash.display.MovieClip;
8 import flash.display.Sprite;
9 import flash.events.Event;
10 import flash.events.MouseEvent;
11 import flash.filesystem.File;
12 import flash.filesystem.FileMode;
13 import flash.filesystem.FileStream;
14 import flash.geom.Rectangle;
15 import flash.net.URLRequest;
16 import flash.text.TextField;
17 import flash.text.TextFieldAutoSize;
18 import flash.utils.ByteArray;
19
20 /**
21 * ...
22 * @author Frost.Yen
23 */
24 public class SaveToJPEG extends Sprite
25 {
26 var ldr:Loader = new Loader();
27 var rect:Rectangle;
28 var bytearr:ByteArray;
29 public function SaveToJPEG():void
30 {
31 init();
32 }
33
34 private function init():void
35 {
36 var btnMC:MovieClip = new MovieClip();
37 btnMC.graphics.beginFill(0xcccccc);
38 btnMC.graphics.drawRoundRect(0, 0, 100, 40, 10, 10);
39 btnMC.graphics.endFill();
40 btnMC.x = 630;
41 btnMC.y = 50;
42 btnMC.buttOnMode= true;
43 btnMC.addEventListener(MouseEvent.CLICK, onClick);
44 this.addChild(btnMC);
45
46 var txt:TextField = new TextField();
47 txt.autoSize = TextFieldAutoSize.LEFT;
48 txt.selectable = false;
49 txt.mouseEnabled = false;
50 txt.text = "点击保存此图片";
51 txt.x = (btnMC.width - txt.width) / 2;
52 txt.y = (btnMC.height - txt.height) / 2;
53 btnMC.addChild(txt);
54
55 ldr.load(new URLRequest("http://hiphotos.baidu.com/frostyen/pic/item/7e49d8b53f6b48ffd9335aa2.jpg"));
56 ldr.contentLoaderInfo.addEventListener(Event.COMPLETE, onComplete);
57 }
58
59 private function onClick(e:MouseEvent):void
60 {
61 if (bytearr != null)
62 {
63 var file:File = new File();
64 file.browseForDirectory("保存");
65 file.addEventListener(Event.SELECT, onSelectPath);
66 }
67 }
68
69 private function onSelectPath(e:Event):void
70 {
71 var file:File = (e.target as File).resolvePath("松竹梅副本.jpg");
72 var filestream:FileStream = new FileStream();
73 filestream.open(file, FileMode.WRITE);
74 filestream.writeBytes(bytearr);
75 }
76
77 private function onComplete(e:Event):void
78 {
79 this.addChild(ldr);
80 rect = ldr.getRect(ldr);
81
82 var bmpd:BitmapData = new BitmapData(rect.width,rect.height);
83 bmpd.draw(ldr);
84 var jpg:JPGEncoder = new JPGEncoder();
85 bytearr = jpg.encode(bmpd) as ByteArray;
86 }
87 }
88 }