Question

我正在尝试执行以下操作：我想加载一个外部图像（dest）并在舞台上显示它，我想加载另一个不可见的图像（src）。当我在舞台上出现的图像上按住鼠标左键时，将调用开始将src图像复制到dest的功能。实际上我想在隐藏另一个下面的图像上重现划痕效果。这是我的代码[用于调试目的的mouse_move事件触发了copypixels函数]

package { import flash.display.Sprite; import flash.display.BitmapData; import flash.display.Loader; import flash.display.LoaderInfo; import flash.net.URLRequest; import flash.geom.Point; import flash.geom.Rectangle; import flash.events.Event; import flash.events.MouseEvent;



[SWF(width='400', height='300', backgroundColor='#ffffff', frameRate='24')]
public class CopyDemo extends Sprite
{
    private const BLADE_WIDTH:Number = 5;
    private const BLADE_HEIGHT:Number = 5;

    private var loadedSurpriseAssetContainer:Sprite;
    private var loadedSurpriseBitmapData:BitmapData;
    private var loadedFrontAssetContainer:Sprite;
    private var loadedFrontBitmapData:BitmapData;

    private var blade:Sprite;

    private var xmouse:Number;
    private var ymouse:Number;

    public function CopyDemo()
    {                       

        loadSurpriseImage("pic1.jpg");

    }

    //-------- loadFrontImage ------------
    private function loadFrontImage(url:String):void
    {
        var loader:Loader = new Loader();
        loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onFrontLoaderComplete);
        loader.load(new URLRequest(url));             
    }

    //------- loadSurpriseImage -------------
    private function loadSurpriseImage(url:String):void
    {
        var loader:Loader = new Loader();
        loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onSurpriseLoaderComplete);
        loader.load(new URLRequest(url));
    }

    private function onFrontLoaderComplete(event:Event):void
    {
        loadedFrontAssetContainer = new Sprite();
        loadedFrontAssetContainer.addChild(LoaderInfo(event.target).content);
        loadedFrontBitmapData = new BitmapData(loadedFrontAssetContainer.width, loadedFrontAssetContainer.height, true, 0x00000000);
        loadedFrontBitmapData.draw(loadedFrontAssetContainer);          

        addChild(loadedFrontAssetContainer);        
        loadedFrontAssetContainer.addEventListener(MouseEvent.MOUSE_MOVE, startcopy);
    }

    private function onSurpriseLoaderComplete(event:Event):void
    {
        loadedSurpriseAssetContainer = new Sprite();
        loadedSurpriseAssetContainer.addChild(LoaderInfo(event.target).content);
        loadedSurpriseBitmapData = new BitmapData(loadedSurpriseAssetContainer.width,
                                                  loadedSurpriseAssetContainer.height,
                                                  true,
                                                  0x00000000);
        loadedSurpriseBitmapData.draw(loadedSurpriseAssetContainer);
        loadedSurpriseAssetContainer.addEventListener(MouseEvent.MOUSE_MOVE, saveCoords);
        loadFrontImage("pic2.jpg");         
    }

    private function saveCoords(event:MouseEvent):void
    {
        //
    }

    private function startcopy(event:MouseEvent):void
    {
        xmouse = mouseX;
        ymouse = mouseY;
        trace("x=" + xmouse + ", y=" + ymouse);
        loadedFrontBitmapData.copyPixels(loadedSurpriseBitmapData,
                                                new Rectangle(0,0,10,10),
                                                new Point(0,0));            
    }
}

[SWF(width='400', height='300', backgroundColor='#ffffff', frameRate='24')] public class CopyDemo extends Sprite { private const BLADE_WIDTH:Number = 5; private const BLADE_HEIGHT:Number = 5; private var loadedSurpriseAssetContainer:Sprite; private var loadedSurpriseBitmapData:BitmapData; private var loadedFrontAssetContainer:Sprite; private var loadedFrontBitmapData:BitmapData; private var blade:Sprite; private var xmouse:Number; private var ymouse:Number; public function CopyDemo() { loadSurpriseImage("pic1.jpg"); } //-------- loadFrontImage ------------ private function loadFrontImage(url:String):void { var loader:Loader = new Loader(); loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onFrontLoaderComplete); loader.load(new URLRequest(url)); } //------- loadSurpriseImage ------------- private function loadSurpriseImage(url:String):void { var loader:Loader = new Loader(); loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onSurpriseLoaderComplete); loader.load(new URLRequest(url)); } private function onFrontLoaderComplete(event:Event):void { loadedFrontAssetContainer = new Sprite(); loadedFrontAssetContainer.addChild(LoaderInfo(event.target).content); loadedFrontBitmapData = new BitmapData(loadedFrontAssetContainer.width, loadedFrontAssetContainer.height, true, 0x00000000); loadedFrontBitmapData.draw(loadedFrontAssetContainer); addChild(loadedFrontAssetContainer); loadedFrontAssetContainer.addEventListener(MouseEvent.MOUSE_MOVE, startcopy); } private function onSurpriseLoaderComplete(event:Event):void { loadedSurpriseAssetContainer = new Sprite(); loadedSurpriseAssetContainer.addChild(LoaderInfo(event.target).content); loadedSurpriseBitmapData = new BitmapData(loadedSurpriseAssetContainer.width, loadedSurpriseAssetContainer.height, true, 0x00000000); loadedSurpriseBitmapData.draw(loadedSurpriseAssetContainer); loadedSurpriseAssetContainer.addEventListener(MouseEvent.MOUSE_MOVE, saveCoords); loadFrontImage("pic2.jpg"); } private function saveCoords(event:MouseEvent):void { // } private function startcopy(event:MouseEvent):void { xmouse = mouseX; ymouse = mouseY; trace("x=" + xmouse + ", y=" + ymouse); loadedFrontBitmapData.copyPixels(loadedSurpriseBitmapData, new Rectangle(0,0,10,10), new Point(0,0)); } }

虽然这两个图像被加载到内存中并且第一个图像显示在舞台上，但当mouse_move事件触发相应的处理程序时，副本不起作用。有什么想法吗？

Answer 1

好的，我不确定这是否正是你想要做的，但我认为这至少会让你走上正确的道路来解决你的问题。复制到新版本的startCopy中，我将其粘贴到您的代码中。哦，还要导入flash.display。*;所以你可以访问Bitmap。

private function startcopy(event:MouseEvent):void
{
    xmouse = mouseX;
    ymouse = mouseY;
    trace("x=" + xmouse + ", y=" + ymouse);
    loadedFrontBitmapData.copyPixels(loadedSurpriseBitmapData,
                                            new Rectangle(mouseX,mouseY,10,10),
                                            new Point(mouseX,mouseY));      
    var newBitmap:Bitmap = new Bitmap(loadedFrontBitmapData);
    newBitmap.x = 0;
    newBitmap.y = 0;
    addChild(newBitmap);
}

我所做的就是更改你传递给copyPixel函数的Rectangle和Point值，这样当你将鼠标移到前面的图像上时，你会看到背景图像出现;然后我使用你从copyPixel获得的更新数据创建了一个新的Bitmap对象，并将其放在舞台上。

希望有所帮助：）

从Loader复制到sprite中加载的Bitmap

1 个答案: