Flash AS3色彩校正

Question

我很快就需要一顶假发来替换我在这个问题上拔出的头发！我在我的网站上有一个flash元素，这是一个XML图库。它应该与背景无缝融合在一起。我导入了一个具有透明度的PNG，其中一个边缘是与另一个BG的混合边缘。当然，在Mac和Windows上都有颜色变化。我试着导入PSD，另存为JPG，使用GammaSlamma删除分析，各种各样的东西。

我以为我必须手动调整图像以匹配，然后根据用户的操作系统或类似疯狂的事情提供两个不同的闪存文件，但后来我看到AS3支持颜色校正，很多人似乎发现它很有用。不用说，我非常兴奋，但我以前从未使用过AS3，而且我对它感到非常头疼。

我找到了一个替代的免费幻灯片放映，那是AS3，但我就是不知道把这段代码添加到哪里。

根据http://kelsocartography.com/blog/?tag=as3-color-correction的说法，代码就是所需要的：

stage.colorCorrection = ColorCorrection.ON;

这个图库的代码(很抱歉有这么长的代码段)：

    //----------------------------------------------------------------------------------------------------
//  XMLSlideshow.as 
//  19 Feb 2009
//  www.simplistika.com
//----------------------------------------------------------------------------------------------------
package com.simplistika
{
import flash.display.*;
import flash.events.*;
import flash.net.URLRequest;
import flash.utils.Timer;

//Color correction
import flash.display.ColorCorrection;
stage.colorCorrection = ColorCorrection.ON;

//----------------------------------------------------------------------------------------------------
//  class definition
//----------------------------------------------------------------------------------------------------
public class XMLSlideshow extends cXMLApp 
{
//----------------------------------------------------------------------------------------------------
//  member data
//----------------------------------------------------------------------------------------------------
private var mTimer : Timer;
private var mPlaceholder1 : Loader = new Loader();
private var mPlaceholder2 : Loader = new Loader();
private var mControl : mcControl = new mcControl();
private var mSlide : int;

//----------------------------------------------------------------------------------------------------
//  slideshow setup
//----------------------------------------------------------------------------------------------------
private var mFile : String = "http://www.simplistika.com/files/ssp/Slideshow.xml";      // path to xml file
private var mInterval : uint = 8000;                                                    // slide interval

//----------------------------------------------------------------------------------------------------
//  constructor
//----------------------------------------------------------------------------------------------------
public function 
XMLSlideshow(   
) : void
{       
    trace(this + " " + "XMLSlideshow.constructor");
    mTimer = new Timer(mInterval, 0);

    mPlaceholder1.contentLoaderInfo.addEventListener(Event.OPEN, fOpen);
    mPlaceholder1.contentLoaderInfo.addEventListener(Event.COMPLETE, fResult);
    mPlaceholder2.contentLoaderInfo.addEventListener(Event.OPEN, fOpen);
    mPlaceholder2.contentLoaderInfo.addEventListener(Event.COMPLETE, fResult);

    //this.addEventListener(MouseEvent.MOUSE_OVER, fOnMouseOver);
    //this.addEventListener(MouseEvent.MOUSE_OUT, fOnMouseOut);
    //this.addEventListener(MouseEvent.CLICK, fOnClick);
    mTimer.addEventListener(TimerEvent.TIMER, fTimer);

    addChild(mPlaceholder1);
    addChild(mPlaceholder2);
    addChild(mControl);

    mSlide = 0;
    mControl.btnForward.alpha = mControl.btnBack.alpha = mControl.btnPause.alpha = 0.0;
    //mControl.btnForward.buttonMode = mControl.btnBack.buttonMode = mControl.btnPause.buttonMode = true;
    mControl.btnForward.visible = mControl.btnBack.visible = false;

    super(mFile);   
    super.addEventListener("XMLLoaded", fStart);
}

//----------------------------------------------------------------------------------------------------
//  fStart
//----------------------------------------------------------------------------------------------------
private function 
fStart(
    e : Event
) : void
{
    trace(this + " " + "XMLSlideshow.fStart");

    fLoadImage();
}

//----------------------------------------------------------------------------------------------------
//  fOnMouseOver
//----------------------------------------------------------------------------------------------------
/* private function 
fOnMouseOver(
e : MouseEvent
) : void 
{   

    switch (e.target.name)
    {
    case "btnPause":
        mTimer.running ? mControl.txtDesc.text = "Pause" : mControl.txtDesc.text = "Play";
        break;      
    case "btnForward":
        mControl.txtDesc.text = "Next";
        break;      
    case "btnBack":
        mControl.txtDesc.text = "Back";     
        break;  
    default:
        return;
    }
    mControl.txtDesc.alpha = 1;
    e.target.alpha = 0.7;
}

//----------------------------------------------------------------------------------------------------
//  fOnMouseOut
//----------------------------------------------------------------------------------------------------
private function 
fOnMouseOut(
e : MouseEvent
) : void 
{
    switch (e.target.name)
    {
    case "btnPause":
    case "btnForward":
    case "btnBack":
        e.target.alpha = 0.5;
        mControl.txtDesc.alpha = 0;
        return;
    }
}

//----------------------------------------------------------------------------------------------------
//  fOnClick
//----------------------------------------------------------------------------------------------------
private function 
fOnClick(
    e : MouseEvent
) : void 
{
    trace(this + " " + "XMLSlideshow.fOnClick " + e.target.name);

    switch (e.target.name)
    {
    case "btnPause":
        if (mControl.txtDesc.text == "Pause") 
        {
            mTimer.stop();
            mControl.btnBack.visible = mControl.btnForward.visible = true;
            mControl.txtDesc.text = "Play";
        } 
        else 
        {
            mTimer.start();
            mControl.btnBack.visible = mControl.btnForward.visible = false;
            mControl.txtDesc.text = "Pause";
        }
        return;
    case "btnForward":
        mSlide == mItems - 1 ? mSlide = 0 : mSlide++;
        break;
    case "btnBack":
        mSlide == 0 ? mSlide = mItems - 1 : mSlide--;
        break;
    default:
        return;
    }       
    fLoadImage();
} */

//----------------------------------------------------------------------------------------------------
//  fLoadImage
//----------------------------------------------------------------------------------------------------
private function 
fLoadImage(
) : void
{
    getChildIndex(mPlaceholder1) != 0 ?
        mPlaceholder2.load(new URLRequest(mData.slide[mSlide].url)) : 
            mPlaceholder1.load(new URLRequest(mData.slide[mSlide].url));
}

//----------------------------------------------------------------------------------------------------
//  fTimer
//----------------------------------------------------------------------------------------------------
private function 
fTimer(
    e : TimerEvent
) : void
{
    mSlide == mItems - 1 ? mSlide = 0 : mSlide++;
    fLoadImage();
}

//----------------------------------------------------------------------------------------------------
//  fOpen
//----------------------------------------------------------------------------------------------------
private function 
fOpen(
    e : Event
) : void 
{
    mTimer.stop();
}

//----------------------------------------------------------------------------------------------------
//  fResult
//----------------------------------------------------------------------------------------------------
private function 
fResult(
    e : Event
) : void
{
    if (!mControl.btnForward.visible)
        mTimer.start();

    getChildIndex(mPlaceholder1) == 0 ? fNextImage(mPlaceholder1) : fNextImage(mPlaceholder2);
}

//----------------------------------------------------------------------------------------------------
//  fKenBurns
//----------------------------------------------------------------------------------------------------
private function 
fNextImage(
    vPlaceholder : Loader
) : void
{
    setChildIndex(vPlaceholder, this.numChildren - 2);
    vPlaceholder.alpha = 0;
    vPlaceholder == mPlaceholder1 ? cTween.to(mPlaceholder2, {alpha:0}, 1) : cTween.to(mPlaceholder1, {alpha:0}, 1);
    cTween.to(vPlaceholder, { alpha:1 }, 1);
}

//----------------------------------------------------------------------------------------------------
}   // class

//----------------------------------------------------------------------------------------------------
}   // package

你可以看到我在里面添加了“色彩校正”，但是当我运行这个文件时得到这个错误：

ReferenceError: Error #1065: Variable stage is not defined.
at global$init()

有什么建议吗？谢谢你……

Answer 1

这是因为stage还没有定义/创建。所以这里有两个选项：

1. 使用ADDED_TO_STAGE侦听器等待将幻灯片添加到舞台。因此，您需要在构造函数中添加以下内容：

addEventListener(Event.ADDED_TO_STAGE，

_added)；并将此函数添加到类中：

私有事件函数(e：_added ){ removeEventListener(Event.ADDED_TO_STAGE，

_added)；stage.colorCorrection = ColorCorrection.ON；}

• 为flash创建一个文档类(有关这些文档的教程，请参阅http://goo.gl/b92SU )，如下所示：

package {导入事件；公共类main扩展了MovieClip { function Main() { addEventListener(Event.ADDED_TO_STAGE，_added)；//主时间线中的其他代码}私有函数事件(e：_added)：void{ removeEventListener(Event.ADDED_TO_STAGE，_added)；stage.colorCorrection = ColorCorrection.ON；}

Answer 2

你不能将代码放在类之外。删除行

stage.colorCorrection = ColorCorrection.ON;

并将其放在您的Document Class构造函数中。如果你在这方面有问题，就意味着你的应用程序没有正确设置。我建议你创建一个新问题，或者阅读this tutorial。