Flash 闪光：调整图片大小时保持透明度
在传输之前，我在我的网站上使用flash程序来调整图片的大小，以保留我的带宽 但是，当我尝试以透明方式传输.png文件时，调整大小不会在.png文件结果中保持透明。 在…之后使用它是个问题 这是代码：Flash 闪光：调整图片大小时保持透明度,flash,apache-flex,transparency,image,Flash,Apache Flex,Transparency,Image,在传输之前，我在我的网站上使用flash程序来调整图片的大小，以保留我的带宽 但是，当我尝试以透明方式传输.png文件时，调整大小不会在.png文件结果中保持透明。 在…之后使用它是个问题 这是代码： public class ImageStrip extends MovieClip { var _img:Bitmap; public var _iHelper:imgHelper; public var fileName:String; public var i
public class ImageStrip extends MovieClip
{
var _img:Bitmap;
public var _iHelper:imgHelper;
public var fileName:String;
public var isEncoding:Boolean=false;
public var isDirty:Boolean = true;
public var encodedByteArray:ByteArray;
private var asyncEncoder:AsyncJPEGEncoder;
private static const _MAX_WIDTH : Number = 800;
private static const _MAX_HEIGHT : Number = 800;
public function ImageStrip(img:Bitmap, fileName:String) {
stripSelected.alpha=stripOver.alpha = 0;
this.fileName=(fileName.substr(0, fileName.search("z-z-z-z")));
var fSize:String = (fileName.substr(fileName.search("z-z-z-z") + 7));
var fName:String;
if (this.fileName.length<15)
fName = this.fileName;
else
fName = this.fileName.substr(0,14)+'.. ';
fName += " "+fSize;
removeBT.addEventListener(MouseEvent.CLICK, eventRemoveClicked);
_img = new Bitmap(img.bitmapData);
caption.text = fName;
_iHelper = new imgHelper(_img);
_iHelper.addEventListener("invalidate", eventImageInvalidated);
addChild(_iHelper);
_iHelper.resizePic(44, 44, true);
_iHelper.x = _iHelper.y = 4;
addEventListener(MouseEvent.CLICK, eventMouseClicked);
addEventListener(MouseEvent.ROLL_OVER, eventOver);
addEventListener(MouseEvent.ROLL_OUT, eventOut);
addEventListener(Event.ADDED_TO_STAGE, onAdded);
pbar.mode = ProgressBarMode.MANUAL;
pbar.reset();
pbar.setProgress(0, 1);
doEncode();
}
public function onAdded(e:Event):void
{
removeBT.label = Local.getInstance().getString("remove");
}
public function eventImageInvalidated(e:*=null) {
pbar.reset();
pbar.visible = true;
pbar.setProgress(0, 1);
doEncode();
}
public function doEncode() {
if (!asyncEncoder){
asyncEncoder = new AsyncJPEGEncoder(90);
asyncEncoder.addEventListener("complete", eventJpgComleted);
asyncEncoder.addEventListener("progress", eventJpgProgress);
}
else {
asyncEncoder.cancel();
}
var btData:BitmapData = _iHelper.resizeBitmapData(_MAX_WIDTH, _MAX_HEIGHT);
isEncoding = true;
encodedByteArray = asyncEncoder.encode(btData);
}
private function eventJpgComleted(e:*) {
isEncoding = false;
isDirty = false;
pbar.visible = false;
}
private function eventJpgProgress(e:ProgressEvent) {
//trace('Progress : : ' + e.bytesLoaded / e.bytesTotal);
var pbar:ProgressBar = pbar as ProgressBar;
pbar.value = (e.bytesLoaded / e.bytesTotal);
}
public function set isUploading(value:Boolean) {
pbar.indeterminate = value;
pbar.visible = value;
}
public function set selected(flag:Boolean) {
if (flag)
TweenLite.to(stripSelected, 0.6, { autoAlpha:1 } );
else
TweenLite.to(stripSelected, 0.6, { autoAlpha:0 } );
}
private function eventOver(e:MouseEvent) {
TweenLite.to(stripOver, 0.6, { autoAlpha:1 } );
}
private function eventOut(e:MouseEvent) {
TweenLite.to(stripOver, 0.6, { autoAlpha:0 } );
}
private function eventRemoveClicked(E:MouseEvent) {
dispatchEvent(new Event("removeStrip", true, true));
}
private function eventMouseClicked(e:MouseEvent) {
e.stopImmediatePropagation();
// not the remove button ...
if (!(e.target is Button))
dispatchEvent(new Event("stripClicked", true, true));
}
}
public class imgHelper extends MovieClip
{
public var tt:TextField;
public var theImage:Bitmap;
private var myMask:MovieClip;
private var _boxDimW:Number;
private var _boxDimH:Number;
public function imgHelper(img:Bitmap=null)
{
theImage = img;
if (theImage)
addChild(theImage);
tt = new TextField;
tt.text = '0%';
/* addChild(tt);*/
}
public override function get width():Number {
return theImage.width;
}
public override function get height():Number {
return theImage.height;
}
public function get _scaleX():Number {
return theImage.scaleX;
}
public function set _scaleX(sx) {
theImage.scaleX = sx;
}
public function get _scaleY():Number {
return theImage.scaleY;
}
public function set _scaleY(sy:Number) {
theImage.scaleY = sy;
}
public function load(url:String)
{
//trace('loading : ' + url);
var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, picLoaded);
loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, errLoading);
loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, progress);
var lContext:LoaderContext = new LoaderContext(true);
var request:URLRequest = new URLRequest(url);
try {
loader.load(request,lContext);
} catch (error:Error) {
trace("Unable to load requested document.");
}
}
private function progress(e:ProgressEvent)
{
tt.text = Math.round(e.bytesLoaded /e.bytesTotal *100) + '%';
}
private function errLoading(e:*)
{
tt.visible = false;
dispatchEvent(new Event("imgLoaded",true,true));
}
private function picLoaded(e:*)
{
var picLoader:Loader = Loader(e.target.loader);
theImage = Bitmap(picLoader.content);
addChild(theImage);
tt.visible = false;
dispatchEvent(new Event("imgLoaded",true,true));
}
public function resizePic(rW:Number,rH:Number,crop:Boolean=false)
{
var img = theImage;
_boxDimW = rW;
_boxDimH = rH;
if (img.width > img.height)
{
img.width = rW;
img.height = img.height * img.scaleX;
}
else
{
img.height = rH;
img.width = img.width * img.scaleY;
}
if (crop)
{
if (img.width < img.height)
{
var oldScaleX = img.scaleX;
img.width = rW;
img.scaleY += img.scaleX-oldScaleX;
}
else
{
var oldScaleY = img.scaleY;
img.height = rH;
img.scaleX += img.scaleY-oldScaleY;
}
maskIt(rW, rH);
}
else {
if (img.height < img.width) {
img.y=(rH-img.height)/2
}
else {
img.x=(rW-img.width)/2
}
}
}
public function resizeBitmapData (rW:Number, rH:Number):BitmapData {
var img:Bitmap = new Bitmap(theImage.bitmapData);
trace('resize bitmap : ' + img.height + '-' + img.width);
trace('resize bitmap : ' + rH + '-' + rW);
if (img.width > img.height) {
if (img.height>rH)
rH = img.height * (rW / img.width);
else{ // do not resize
rH = img.height;
rW = img.width;
}
}
else {
if (img.width>rW)
rW = img.width * (rH / img.height);
else{ // do not resize
rH = img.height;
rW = img.width;
}
}
var bmpData:BitmapData = new BitmapData(rW, rH);
var scaleMatrix:Matrix = new Matrix( rW / img.width , 0, 0, rH / img.height , 0,0);
var colorTransform:ColorTransform = new ColorTransform();
bmpData.draw(theImage, scaleMatrix , colorTransform, null, null, true);
return (bmpData);
}
public function rotate(dir:Number) {
var workingImage:Bitmap = new Bitmap(theImage.bitmapData.clone());
var bmpData:BitmapData = new BitmapData(workingImage.height, workingImage.width);
if (dir > 0)
{
var transMatrix:Matrix = new Matrix(Math.cos(dir),Math.sin(dir),-Math.sin(dir),Math.cos(dir), workingImage.height,0);
}
else
{
var transMatrix:Matrix = new Matrix(Math.cos(dir),Math.sin(dir),-Math.sin(dir),Math.cos(dir),0, workingImage.width);
}
var colorTransform:ColorTransform = new ColorTransform();
bmpData.draw(workingImage, transMatrix, colorTransform, null, null, true);
TweenLite.to(theImage, 0.5, { autoAlpha:0 } );
//removeChild(theImage);
theImage = new Bitmap(bmpData);
addChild(theImage);
//trace(theImage.y + '--' + theImage.x+'--'+theImage.height+'--'+theImage.width);
if (theImage.height < theImage.width) {
theImage.y += (_boxDimH - theImage.height) / 2
}
else {
theImage.x +=(_boxDimW-theImage.width)/2
}
theImage.alpha = 0;
TweenLite.to(theImage, 1, { autoAlpha:1 } );
trace('sending event !');
dispatchEvent(new Event("invalidate", true, true));// invalidate for re-encoding the image.
}
public function maskIt(w:Number, h:Number)
{
if (myMask) {
removeChild(myMask);
myMask = null;
}
myMask = new MovieClip();
myMask.graphics.beginFill(0xFFCC00);
myMask.graphics.drawRect(0, 0, w,h);
addChild(myMask);
this.mask = myMask;
}
public function dispose() {
}
}
公共类imgHelper扩展了MovieClip
{
公共变量tt:TextField；
公共变量图像：位图；
私人电影：MovieClip；
私有变量_boxDimW：编号；
私有变量_boxDimH：编号；
公共函数imgHelper（img:Bitmap=null）
{
图像=img；
如果（图像）
addChild（theImage）；
tt=新文本字段；
tt.text='0%'；
/*addChild（tt）*/
}
公共重写函数get width（）：Number{
返回图像宽度；
}
公共覆盖函数get height（）：编号{
返回图像高度；
}
公共函数get _scaleX（）：编号{
返回image.scaleX；
}
公共函数集_scaleX（sx）{
theImage.scaleX=sx；
}
公共函数get _scaleY（）：编号{
返回image.scaleY；
}
公共函数集_scaleY（sy:Number）{
theImage.scaleY=sy；
}
公共函数加载（url:String）
{
//跟踪（“加载：”+url）；
变量加载器：加载器=新加载器（）；
loader.contentLoaderInfo.addEventListener（Event.COMPLETE，picLoaded）；
loader.contentLoaderInfo.addEventListener（IOErrorEvent.IO_ERROR，errLoading）；
loader.contentLoaderInfo.addEventListener（ProgressEvent.PROGRESS，PROGRESS）；
var lContext:LoaderContext=新的LoaderContext（true）；
var-request:URLRequest=新的URLRequest（url）；
试一试{
loader.load（请求，lContext）；
}捕获（错误：错误）{
跟踪（“无法加载请求的文档”）；
}
}
专用功能进度（e:ProgressEvent）
{
tt.text=Math.round（e.bytesloadded/e.bytesttotal*100）+'%'；
}
私有函数错误加载（e:*）
{
tt.visible=false；
dispatchEvent（新事件（“imgLoaded”，true，true））；
}
私有函数加载（e:*）
{
var picLoader:Loader=Loader（即target.Loader）；
theImage=位图（picLoader.content）；
addChild（theImage）；
tt.visible=false；
dispatchEvent（新事件（“imgLoaded”，true，true））；
}
公共函数resizePic（rW:Number，rH:Number，裁剪：Boolean=false）
{
var img=图像；
_boxDimW=rW；
_boxDimH=rH；
如果（img.宽度>img.高度）
{
img.width=rW；
img.height=img.height*img.scaleX；
}
其他的
{
img.高度=相对湿度；
img.width=img.width*img.scaleY；
}
如果（作物）
{
if（img.宽度img.高度）{
如果（进气高度>右侧）
rH=惯性高度*（rW/惯性宽度）；
否则{//不调整大小
rH=惯性高度；
rW=img.宽度；
}
}
否则{
如果（图像宽度>rW）
rW=内模宽度*（右侧/内模高度）；
否则{//不调整大小
rH=惯性高度；
rW=img.宽度；
}
}
var bmpData:BitmapData=新的BitmapData（rW，rH）；
var scaleMatrix：矩阵=新矩阵（rW/img.width，0,0，rH/img.height，0,0）；
var colorTransform:colorTransform=new colorTransform（）；
draw（图像、缩放矩阵、颜色变换、null、null、true）；
返回（bmpData）；
}
公共功能（目录：编号）{
var workingImage:Bitmap=新位图（theImage.bitmapData.clone（））；
var bmpData:BitmapData=新的位图数据（workingImage.height，workingImage.width）；
如果（dir>0）
{
var transMatrix:Matrix=新矩阵（Math.cos（dir），Math.sin（dir），-Math.sin（dir），Math.cos（dir），workingImage.height，0）；
}
其他的
{
var transMatrix:Matrix=新矩阵（Math.cos（dir），Math.sin（dir），-Math.sin（dir），Math.cos（dir），0，workingImage.width）；
}
var colorTransform:colorTransform=new colorTransform（）；
绘制（工作图像、transMatrix、colorTransform、null、null、true）；
TweenLite.to（theImage，0.5，{autoAlpha:0}）；
//移除儿童（图像）；
图像=新位图（bmpData）；
addChild（theImage）；
//跟踪（图像y+'-'+图像x+'-'+图像高度+'-'+图像宽度）；
if（图像高度<图像宽度）{
图像y+=（\u-boxDimH-图像高度）/2
}
否则{
图像x+=（\u-boxDimW-theImage.width）/2
}
图像α=0；
TweenLite.to（theImage，1，{autoAlpha:1}）；
跟踪（'发送事件！'）；
dispatchEvent（新事件（“invalidate”，true，true））；//用于重新编码图像的invalidate。
}
公共职能
public class imgHelper extends MovieClip
{
public var tt:TextField;
public var theImage:Bitmap;
private var myMask:MovieClip;
private var _boxDimW:Number;
private var _boxDimH:Number;
public function imgHelper(img:Bitmap=null)
{
theImage = img;
if (theImage)
addChild(theImage);
tt = new TextField;
tt.text = '0%';
/* addChild(tt);*/
}
public override function get width():Number {
return theImage.width;
}
public override function get height():Number {
return theImage.height;
}
public function get _scaleX():Number {
return theImage.scaleX;
}
public function set _scaleX(sx) {
theImage.scaleX = sx;
}
public function get _scaleY():Number {
return theImage.scaleY;
}
public function set _scaleY(sy:Number) {
theImage.scaleY = sy;
}
public function load(url:String)
{
//trace('loading : ' + url);
var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, picLoaded);
loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, errLoading);
loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, progress);
var lContext:LoaderContext = new LoaderContext(true);
var request:URLRequest = new URLRequest(url);
try {
loader.load(request,lContext);
} catch (error:Error) {
trace("Unable to load requested document.");
}
}
private function progress(e:ProgressEvent)
{
tt.text = Math.round(e.bytesLoaded /e.bytesTotal *100) + '%';
}
private function errLoading(e:*)
{
tt.visible = false;
dispatchEvent(new Event("imgLoaded",true,true));
}
private function picLoaded(e:*)
{
var picLoader:Loader = Loader(e.target.loader);
theImage = Bitmap(picLoader.content);
addChild(theImage);
tt.visible = false;
dispatchEvent(new Event("imgLoaded",true,true));
}
public function resizePic(rW:Number,rH:Number,crop:Boolean=false)
{
var img = theImage;
_boxDimW = rW;
_boxDimH = rH;
if (img.width > img.height)
{
img.width = rW;
img.height = img.height * img.scaleX;
}
else
{
img.height = rH;
img.width = img.width * img.scaleY;
}
if (crop)
{
if (img.width < img.height)
{
var oldScaleX = img.scaleX;
img.width = rW;
img.scaleY += img.scaleX-oldScaleX;
}
else
{
var oldScaleY = img.scaleY;
img.height = rH;
img.scaleX += img.scaleY-oldScaleY;
}
maskIt(rW, rH);
}
else {
if (img.height < img.width) {
img.y=(rH-img.height)/2
}
else {
img.x=(rW-img.width)/2
}
}
}
public function resizeBitmapData (rW:Number, rH:Number):BitmapData {
var img:Bitmap = new Bitmap(theImage.bitmapData);
trace('resize bitmap : ' + img.height + '-' + img.width);
trace('resize bitmap : ' + rH + '-' + rW);
if (img.width > img.height) {
if (img.height>rH)
rH = img.height * (rW / img.width);
else{ // do not resize
rH = img.height;
rW = img.width;
}
}
else {
if (img.width>rW)
rW = img.width * (rH / img.height);
else{ // do not resize
rH = img.height;
rW = img.width;
}
}
var bmpData:BitmapData = new BitmapData(rW, rH);
var scaleMatrix:Matrix = new Matrix( rW / img.width , 0, 0, rH / img.height , 0,0);
var colorTransform:ColorTransform = new ColorTransform();
bmpData.draw(theImage, scaleMatrix , colorTransform, null, null, true);
return (bmpData);
}
public function rotate(dir:Number) {
var workingImage:Bitmap = new Bitmap(theImage.bitmapData.clone());
var bmpData:BitmapData = new BitmapData(workingImage.height, workingImage.width);
if (dir > 0)
{
var transMatrix:Matrix = new Matrix(Math.cos(dir),Math.sin(dir),-Math.sin(dir),Math.cos(dir), workingImage.height,0);
}
else
{
var transMatrix:Matrix = new Matrix(Math.cos(dir),Math.sin(dir),-Math.sin(dir),Math.cos(dir),0, workingImage.width);
}
var colorTransform:ColorTransform = new ColorTransform();
bmpData.draw(workingImage, transMatrix, colorTransform, null, null, true);
TweenLite.to(theImage, 0.5, { autoAlpha:0 } );
//removeChild(theImage);
theImage = new Bitmap(bmpData);
addChild(theImage);
//trace(theImage.y + '--' + theImage.x+'--'+theImage.height+'--'+theImage.width);
if (theImage.height < theImage.width) {
theImage.y += (_boxDimH - theImage.height) / 2
}
else {
theImage.x +=(_boxDimW-theImage.width)/2
}
theImage.alpha = 0;
TweenLite.to(theImage, 1, { autoAlpha:1 } );
trace('sending event !');
dispatchEvent(new Event("invalidate", true, true));// invalidate for re-encoding the image.
}
public function maskIt(w:Number, h:Number)
{
if (myMask) {
removeChild(myMask);
myMask = null;
}
myMask = new MovieClip();
myMask.graphics.beginFill(0xFFCC00);
myMask.graphics.drawRect(0, 0, w,h);
addChild(myMask);
this.mask = myMask;
}
public function dispose() {
}
}
package Classes.utils
{
import flash.display.BitmapData;
import flash.events.Event;
import flash.events.EventDispatcher;
import flash.events.IEventDispatcher;
import flash.events.ProgressEvent;
import flash.utils.ByteArray;
import flash.utils.setInterval;
import flash.utils.clearInterval;
import com.adobe.images.JPGEncoder;
import com.adobe.images.BitString;
[Event(name="progress", type="flash.events.ProgressEvent")]
[Event(name="complete", type="flash.events.Event")]
[Event(name="cancel", type="flash.events.Event")]
public class AsyncJPEGEncoder extends JPGEncoder implements IEventDispatcher
{
private var _dispatcher:EventDispatcher;
private var _encodeTimer:int;
private var DCY:Number;
private var DCU:Number;
private var DCV:Number;
private var _ypos:int;
public var attachedImageStrip:Number = -1;
public function AsyncJPEGEncoder(quality:Number=50)
{
super(quality);
_dispatcher = new EventDispatcher(this);
}
/**
* Created a JPEG image from the specified BitmapData
*
* @param image The BitmapData that will be converted into the JPEG format.
* @return a ByteArray representing the JPEG encoded image data.
* @langversion ActionScript 3.0
* @playerversion Flash 9.0
* @tiptext
*/
override public function encode(image:BitmapData):ByteArray
{
// Initialize bit writer
byteout = new ByteArray();
bytenew=0;
bytepos=7;
// Add JPEG headers
writeWord(0xFFD8); // SOI
writeAPP0();
writeDQT();
writeSOF0(image.width,image.height);
writeDHT();
writeSOS();
// Encode 8x8 macroblocks
DCY=0;
DCU=0;
DCV=0;
bytenew=0;
bytepos=7;
_ypos = 0;
flash.utils.clearInterval(_encodeTimer);
_encodeTimer = flash.utils.setInterval(doEncode, 1, image);
return byteout;
}
import flash.display.Stage;
private function doEncode(image:BitmapData):void
{
for (var xpos:int=0; xpos<image.width; xpos+=8)
{
RGB2YUV(image, xpos, _ypos);
DCY = processDU(YDU, fdtbl_Y, DCY, YDC_HT, YAC_HT);
DCU = processDU(UDU, fdtbl_UV, DCU, UVDC_HT, UVAC_HT);
DCV = processDU(VDU, fdtbl_UV, DCV, UVDC_HT, UVAC_HT);
}
_ypos += 8;
var e:ProgressEvent = new ProgressEvent(ProgressEvent.PROGRESS);
if (_ypos<image.height)
{
e.bytesLoaded = _ypos;
e.bytesTotal = image.height;
dispatchEvent(e);
}
else
{
flash.utils.clearInterval(_encodeTimer);
e.bytesLoaded = image.height;
e.bytesTotal = image.height;
dispatchEvent(e);
finishEncode();
}
}
private function finishEncode():void
{
// Do the bit alignment of the EOI marker
if ( bytepos >= 0 ) {
var fillbits:BitString = new BitString();
fillbits.len = bytepos+1;
fillbits.val = (1<<(bytepos+1))-1;
writeBits(fillbits);
}
writeWord(0xFFD9); //EOI
//return byteout;
var e:Event = new Event(Event.COMPLETE);
dispatchEvent(e);
}
public function cancel():void
{
var e:Event = new Event(Event.CANCEL);
dispatchEvent(e);
flash.utils.clearInterval(_encodeTimer);
}
public function getBytes():ByteArray
{
return byteout;
}
public function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void{
_dispatcher.addEventListener(type, listener, useCapture, priority);
}
public function dispatchEvent(evt:Event):Boolean{
return _dispatcher.dispatchEvent(evt);
}
public function hasEventListener(type:String):Boolean{
return _dispatcher.hasEventListener(type);
}
public function removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void{
_dispatcher.removeEventListener(type, listener, useCapture);
}
public function willTrigger(type:String):Boolean {
return _dispatcher.willTrigger(type);
}
}
}
new BitmapData(width,height,true,0);