将视频文件等分切割BitmapData.draw使用

package {
import com.viewtoo.common.view.CommonSprite;
import flash.events.Event;
import fl.video.*;
import flash.display.*;
import flash.events.*;
import flash.geom.*;
/**
* ...
* @author Lancelot
*/
public class VideoGridView extends Sprite {

   private var flvPlayer:FLVPlayback = null;
   private var len:Number = 3;
   private var _w:Number;
   private var _h:Number;
   //
   private var runObject:Array = [];
   public function VideoGridView() {
    super();
   }
 
   protected override function onAdded(evt:Event):void {
    super.onAdded(evt);
    flvPlayer = new FLVPlayback();
    flvPlayer.bufferTime = 3;
    flvPlayer.load("../mvGame/1.flv");
    flvPlayer.autoPlay = true;
    flvPlayer.addEventListener(MetadataEvent.METADATA_RECEIVED, onMetaData);
   }

   private function onMetaData(evt:MetadataEvent):void {
    flvPlayer.width = evt.info.width;
    flvPlayer.height = evt.info.height;
    _w = flvPlayer.width / len;
    _h = flvPlayer.height / len;
    flvPlayer.visible = false;
    addChild(flvPlayer);

    this.addEventListener(Event.ENTER_FRAME, onVideoEnterFrame);
    drawVideo();
   }
 
   // 开始照相
   private function onVideoEnterFrame(evt:Event):void {
    var l:Number = runObject.length;
    for (var i:Number = 0; i < l; i++) {
     var mybmp:BitmapData = runObject[i].mybmpdata;
     var matrix:Matrix = runObject[i].matrix;
     var rect:Rectangle = runObject[i].ract;
     // 绘制9个区域
     mybmp.draw(flvPlayer, matrix, null, null, rect);
    }
   }
 
   private function onImageMouseDownEvent(evt:MouseEvent):void {
    var maskView:Sprite = Sprite(evt.currentTarget);
    maskView.startDrag(false, null);
    maskView.addEventListener(MouseEvent.MOUSE_UP, onImageMouseUpEvent);
   }
 
   private function onImageMouseUpEvent(evt:MouseEvent):void {
    var maskView:Sprite = Sprite(evt.currentTarget);
    maskView.removeEventListener(MouseEvent.MOUSE_UP, onImageMouseUpEvent);
    maskView.stopDrag();
        }
 
   // 快照
   private function drawVideo():void {
    for (var x:Number = 0; x < len; x++) {
     for (var y:Number = 0; y < len; y++) {
      var obj:Object = new Object();
      var rect:Rectangle = new Rectangle(_w * x, _h * y, _w, _h);
      var matrix:Matrix = new Matrix(1, 0, 0, 1, -rect.x, -rect.y);
      // 避免误差
      rect.width += 1;
      var mybmp:BitmapData = new BitmapData(rect.width, rect.height);
      mybmp.draw(flvPlayer, matrix, null, null, rect);
      var sp:Sprite = new Sprite();
      sp.x = _w * x;
      sp.y = _h * y;
      sp.addEventListener(MouseEvent.MOUSE_DOWN, onImageMouseDownEvent);
      var bit:Bitmap = new Bitmap(mybmp);
      sp.addChild(bit);
      addChild(sp);
    
      runObject.push( { mybmpdata:mybmp, matrix:matrix, rect:rect } );
     }
    }
   }
}
}