Capture StageWebView bitmapData?

Is there a way to capture what is displaying in a StageWebView into a bitmap? I see the docs have a drawViewPortToBitmapData() method, but it says it's available in AIR 2.6?
http://help.adobe.com/en_US/FlashPlatform/beta/reference/actionscript/3/flash/media/StageW ebView.html#drawViewPortToBitmapData()

That feature is still under development and isn't available in any public betas right now. (Flash Player released a beta -- which is why this method is shown in the reference, but AIR did not.)

Similar Messages

BitmapData.draw() failing to draw entire MovieClip

Hi, all;
I'm trying to do some lean blitting for an object that rotates by rotating it once at startup and capturing a BitmapData snapshot of each 5 degrees. The problem I'm having is that the draw() method of the BitmapData object is only picking up pixels in the MovieClip that are below and to the right of the registration point. If I change the MC so that the registration point is in the top left corner, I sometimes get what looks like most of the pixels, but the entire object rotates into and out of the frame, since it's rotating around the corner and not the center.
Has anyone encountered this before, and if so is there a fix?
Thanks;
Amy Blankenship
flexdiary.blogspot.com

I think you're misunderstanding the question. I am using a matrix to transform it, and that lower right quadrant of the MovieClip rotates perfectly as inended, but the rest of the object isn't captured as if it weren't there.
Here's the code:
package com.magnoliamultimedia.datastructures
import flash.display.BitmapData;
import flash.display.IBitmapDrawable;
import com.magnoliamultimedia.datastructures.IChain;
import com.magnoliamultimedia.datastructures.IChainable;
import flash.geom.Matrix;
import flash.geom.Rectangle;
* RotationChain takes an IBitmapDrawable and rotates
* it through 360 degrees, creating a BitmapDataLink
* for each incremental rotation
* @author Amy Blankenship
public class RotationChain implements IChain
//private storage for the chain entry point
private var _defaultNode:IChainable;
   * Constructor
   * @param rotatingObj object to rotate
   * @param degrees number of degrees to rotate (must divide evenly into 360)
public function RotationChain(rotatingObj:IBitmapDrawable, degrees:int=5, size:int=200)
   //first, check if degrees divides evenly into 360
   if (360 % degrees != 0) {
    throw new Error('Degrees must divide evenly into 360');
    //set to the default, so we still have a usable chain
    degrees = 5;
   var matrix:Matrix = new Matrix();
   var bd:BitmapData;
   var bdl:BitmapDataLink;
   var lastBDL:BitmapDataLink;
   var loops:int = 360 / degrees - 1;
   for (var i:int = 0; i < loops; i++) {
    /* Take "snapshot" of rotating obj with matrix applied.
     * On the first loop, use the identity matrix.
    bd = new BitmapData(size, size);
    bd.draw(rotatingObj, matrix);
    bdl = new BitmapDataLink(bd);
    //check for any previous links that might have been added
    if (lastBDL == null) {
     //no? this is the default
     defaultNode = bdl;
    } else {
     //set up reciprocal arrangement with last node
     bdl.previous = lastBDL;
     lastBDL.next = bdl;
    //set this link as the last link
    lastBDL = bdl;
    //rotate next snapshot
    matrix.rotate(degrees);
   //connect the last link to the first link to make a circular chain
   lastBDL.next = defaultNode;
   defaultNode.previous = lastBDL;
/* INTERFACE com.magnoliamultimedia.datastructures.IChain */
public function get defaultNode():IChainable
   return _defaultNode;
public function set defaultNode(value:IChainable):void
   _defaultNode = value;
Is there anyone out there who does this kind of stuff?
Thanks;
Amy

Store and retreive image/bitmapdata to/from local storage in iOS-app

I'm trying to store and retreive cam-captured bitmapdata to the local app-space, but after a whole day of searching and trying I can't find any working example.
It's no problem capturing cam-bitmapdata, but how to store (and retreive).
Thanks!

If its just a problem of saving the bitmapdata, follow along:
http://actionsnippet.com/?p=1093
Use http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/filesystem/File.h tml#applicationStorageDirectory to resolve to the correct location.

How do i resize the image getting captured by ImageSnapshot???

hey guys... so im taking an image of a movie clip using ImageSnapshot.captureBitmapData(myClip);
i need to resize the bitmap data that i get back, the size needs to be 720X486
the code i have is...
var myClip:MovieClip = event.target as MovieClip;
var imageBitmapData:BitmapData = ImageSnapshot.captureBitmapData(myClip);
var pngEncode:PNGEncoder = new PNGEncoder();
var ba:ByteArray = pngEncode.encode(imageBitmapData);
any ideas??? i tried to use the matrix.scale, but i guess i didnt understand on how to use it properly...
any help is greatly appretiated!!
thanks

Hi,
You can also use the below approach to capture the BitmapData of your moviclip(myClip).
So that you can make use of matrix class to resize the bitmap image.
     var myClip:MovieClip = event.target as MovieClip;
     var imageBitmapData:BitmapData = new BitmapData(myClip.width,myClip.height);
    var pngEncode:PNGEncoder = new PNGEncoder();
    var ba:ByteArray = pngEncode.encode(imageBitmapData);
    var m:Matrix = new Matrix();
    imageBitmapData.draw(myClip,m);
    m.scale(1.2,1);
If this post answers your question or helps, please kindly mark it as such.
Thanks,
Bhasker Chari

Canvas Hierarchy to BitmapData

I'm trying to capture the graphic contents of a hierarchy of Canvases to a BitmapData. I'm using BitmapData.draw and passing it the Canvas that contains the hierarchy. However I am only capturing the contents of the root Canvas's Graphics object. None of the contained objects are showing up in the BitmapData. I am creating a hierarchy of Canvases in order to get graphics effects (drawing with a hierarchy of clipping paths) that I can't do in a single Graphics object. Is there any way to flatten this out to a single bitmap?
David

Hi,
Although I dont understand your problem properly,but still trying to Resolve it.
Below is the code in which I am having a canvas inside canvas and so on.
Then I am capturing the bitmapdata of the outer canvas, and creating a new Image
with that bitmapdata.It is creating the same childeren heerarchy as is in the
oringional Canvas.The code is below.
Main.MXML
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="horizontal">
<mx:Script>
<![CDATA[
import mx.core.UIComponent;
public function CreateBitmapImage() : BitmapData
var bitmapData:BitmapData = getBitmapData( UIComponent( sourceCanvas ) );
targetImage.source = new Bitmap( bitmapData );
return bitmapData;
private function getBitmapData( target : UIComponent ) : BitmapData
var bitmapData : BitmapData = new BitmapData( target.width, target.height,true, 0x00000000);
bitmapData.draw( target );
return bitmapData;
]]>
</mx:Script>
<mx:Canvas id="sourceCanvas" width="500" height="500" backgroundColor="0xFFFFFF">
<mx:Canvas width="400" height="400" backgroundColor="0xFF0000">
<mx:Canvas width="300" height="300" backgroundColor="0x000FF00">
<mx:Canvas width="200" height="200" backgroundColor="0x0000FF"/>
</mx:Canvas>
</mx:Canvas>
</mx:Canvas>

<mx:Image id="targetImage" creationComplete="CreateBitmapImage()"/>
</mx:Application>
Pls let me know if you have any problem,or i am unable to understand ur problem.
Shardul Singh Bartwal

BitmapData before a component is displayed

Is it possible to get the BitmapData from a component that hasn't been displayed? For example, lets say I wanted to fly in some text and a button. I would like to capture the BitmapData of a Label and a Button component I created but wasn't shown to the user, then manipulate the image of those.

You can call BitmapData.draw and pass in things not on the display list, but
Flex won't finish initializing things that are not on the display list.

Screenshot of iOS NativeExtension view

Context:
I need to add UI-elements on top of some native views.
When adding native components on screen (Native Alerts, SMS compose-view, Email compose-view, MapKit, etc.) they are layered over the entire AIR application.
I have no control over this layering and so I can not put AIR UI-elements above these views.
So... what I'm trying to do is:
- take a screenshot (bitmapdata) of the component (eg.: MapKit, or even the entire screen)
- hide the actual native component
- add the bitmapdata to the AIR displaylist
- add the neccesary UI-elements over that bitmap
- presto
But native components aren't part of the displaylist, so I can't take bitmapdata from them...
So my second plan was to capture the bitmapdata natively as a UIImage, convert that to a bytearray and pass it to AIR.
Then in actionscript convert the bytearray back to an image, etc.
This seems like an awful lot of work (I'm not even sure it would work) to get a screenshot of a native view or the entire screen.
Actual question:
How can I take a screenshot of my iDevice and use it in flash?
And please don't tell me to use the cameraroll, I don't want to store dozens of UI screenshots on the users device.

Hi Brandov, I've posted an example of this on my website. It might require some tweaking for you specific case, but I'm successfully doing just this.
See the source here: http://tyleregeto.com/drawing-ios-uiviews-to-as3-bitmapdata-via-air
I hope that helps.

Draw characters on the screen

As we draw circles and other graphics, is there any way to
draw characters on the screen or print characters on the
screen?

Do you mean you want to render Text with the drawing API?
If so, there's no native way to do that, but it can be done
by capturing a bitmapData copy of a TextField's contents and using
it in a BitmapFill.
But its much easier to use Degrafa with RasterText:
http://www.degrafa.org/blog/2008/11/rastertext-for-advanced-text-graphics/

Capturing bitmapData while in FullScreen

Is this possible?? Limitation with the Flash player?
I am trying to do an image capture while in full screen, however the full image area is only partially captured, or the coordinates are off (see images below). The document size is 100x700, and the stage is set not to scale / aligned to bottom.
I've been able to capture the right size, however it always seems to capturing the image from the wrong start x,y position. There is some elements out of bounds but I am just trying to clip them depending on the current stage width and height.
In the source files you will see a few of my attempts commented off (below/attached). Is anyone willing to help me troubleshoot this.
Fullscreen Capture :
Normal Capture :
CODE :
import com.adobe.images.JPGEncoder;
///---------- [ Set Variables ] --------///
var zeroPos:Number=0-stage.stageWidth;
var xPos:Number = (stage.stageWidth-mouseX)+zeroPos;
var xPos2:Number = (stage.stageWidth+mouseX)+zeroPos;
var centerpointW:Number = stage.stageWidth/2;
var centerpointH:Number = stage.stageHeight/2;
var stage_top:Number = stage.stageHeight-(stage.stageHeight*.95);
var stage_bottom:Number = stage.stageHeight*.95;
var gap_dist:Number = 1;
var section_dist:Number = 10;
///---------- [ Set Stage ] --------///
stage.quality=StageQuality.HIGH;
stage.align=StageAlign.BOTTOM;
StageScaleMode.NO_SCALE;
///---------- [ Save Wallpaper ] --------///
function createJPG(m:MovieClip, q:Number, fileName:String){
    //test_pos.x = test_pos.y = 0;
    //test_pos.x = 500;
    //test_pos.width = stage.stageWidth;
    var jpgSource:BitmapData = new BitmapData (stage.stageWidth, stage.stageHeight,false,0xFFCC00);
    //var jpgSource:BitmapData = grab( m, new Rectangle(500-centerpointW, (700-stage.stageHeight), stage.stageWidth, stage.stageHeight), true );
    var jpgData:BitmapData = new BitmapData (stage.stageWidth, stage.stageHeight,false,0xFFCC00);
    var trans:Matrix = new Matrix();
    //var screenRectangle:Rectangle = new Rectangle((0-500), (700-stage.stageHeight), stage.stageWidth, stage.stageHeight);
    var screenRectangle:Rectangle = new Rectangle(500-centerpointW, (700-stage.stageHeight), stage.stageWidth, stage.stageHeight);
    //var screenRectangle2:Rectangle = new Rectangle(0, 0, stage.stageWidth, stage.stageHeight);
    var wp_myDate:Date = new Date();
    var wp_timeNow:Number = wp_myDate.getTime();
    //trans.translate(500-centerpointW, 700-stage.stageHeight);
    //jpgSource.draw(m);
    //jpgSource.draw(m, new Matrix(0, 0, 0, 0, 500-centerpointW, 700-stage.stageHeight));
    //jpgSource.draw(m, trans, null,null,null,true);
    //jpgSource.fillRect(screenRectangle, 0xFF0000);
    var mxx:Matrix = new Matrix();
    mxx.tx = 500-centerpointW;
    mxx.ty = 700-stage.stageHeight;
    //jpgSource.draw(m, mxx);
    jpgSource.draw(m, null, null,null,screenRectangle,true);
    //jpgSource.draw(m, new Matrix(1, 0, 0, 1, 500-centerpointW, 700-stage.stageHeight));
    jpgData.copyPixels( jpgSource, screenRectangle, new Point(0, 0) );
    //jpgData.copyPixels( jpgSource, screenRectangle2, new Point(0, 0) );
    jpgSource.dispose();
    var jpgEncoder:JPGEncoder = new JPGEncoder(q);
    var jpgStream:ByteArray = jpgEncoder.encode(jpgData);
    //var jpgStream:ByteArray = jpgEncoder.encode(jpgSource);
    var header:URLRequestHeader = new URLRequestHeader ("Content-type", "application/octet-stream");
    var jpgURLRequest:URLRequest = new URLRequest ("screenshot_download.php?name=" + fileName + wp_timeNow.toString()+".jpg");
    var jpgURLLoader:URLLoader = new URLLoader();
    jpgURLRequest.requestHeaders.push(header);
    jpgURLRequest.method = URLRequestMethod.POST;
    jpgURLRequest.data = jpgStream;
    navigateToURL(jpgURLRequest, "_self");
function grab( source:DisplayObject, rect:Rectangle, smoothing:Boolean ):BitmapData{
    if( !source is IBitmapDrawable )
        throw new Error( "Cannot create BitmapData. Source must implement IBitmapDrawable" );
    var bmpData1:BitmapData = new BitmapData( stage.stageWidth, stage.stageHeight, true, 0x00000000 );
    var bmpData2:BitmapData = new BitmapData( rect.width, rect.height, true, 0x00000000 );
    bmpData1.draw( source, null, null, null, null, smoothing );
    bmpData2.copyPixels( bmpData1, rect, new Point( 0, 0 ) );
    bmpData1.dispose();
    return bmpData2;
function onSaveWallpaper($event:MouseEvent):void {
    //stage.displayState=StageDisplayState.NORMAL;
    createJPG(this, 90, stage.stageWidth+"x"+stage.stageHeight);
captureTab.addEventListener(MouseEvent.CLICK, onSaveWallpaper);
///---------- [ Fullsreen Functions ] --------///
function showFullScreen($event:MouseEvent):void {
    stage.displayState=StageDisplayState.FULL_SCREEN;
    stage.align=StageAlign.BOTTOM;
fsTab.addEventListener(MouseEvent.CLICK, showFullScreen);
Here's the code for the php ("screenshot_download.php") :
<?php
if ( isset ( $GLOBALS["HTTP_RAW_POST_DATA"] )) {
    // get bytearray
    $im = $GLOBALS["HTTP_RAW_POST_DATA"];
    // add headers for download dialog-box
    header('Content-Type: image/jpeg');
    header("Content-Disposition: attachment; filename=".$_GET['name']);
    echo $im;
} else echo 'An error occured.';
?>

Thanks all. I was able to resolve this issue :
Here it is in action (right click for fullscreen option) :
http://todreamawake.com/beta_test.html?load_stage=main_menu
I decided to break from this while I worked on making other updates to the site. And yesterday I took another look at it, and took me about 15mins to relize what I was doing wrong. Turns out I had it in one of my attemps but my calculations was backwords.
    var jpgSource:BitmapData = new BitmapData (stage.stageWidth, stage.stageHeight);
    var trans:Matrix = new Matrix();
    trans.translate(centerpointW-500, stage.stageHeight-700);
     // I had this as 500-centerpointW, 700-stage.stageHeight
    jpgSource.draw(m, trans, null,null,null,true);
    var jpgEncoder:JPGEncoder = new JPGEncoder(85);
    var jpgStream:ByteArray = jpgEncoder.encode(jpgSource);
    var header:URLRequestHeader = new URLRequestHeader("Content-type", "application/octet-stream");
     var jpgURLRequest:URLRequest = new URLRequest("screenshot_download.php?name=sketch_"+fileName);
    jpgURLRequest.requestHeaders.push(header);
    jpgURLRequest.method = URLRequestMethod.POST;
    jpgURLRequest.data = jpgStream;
     navigateToURL(jpgURLRequest, "_self");
Thanks again, I attached the updated FLA if it can help anyone else.

BitmapData.draw fails to capture webcam

I am trying take a snapshot from a webcam. I'm using
BitmapData.draw(video). This works fine on my desktop but when I
try to do it in the browser it fails. Apparently this is some kind
of security restriction. Is there a way to get around it?

Hello jspoon27,
I am working on a locally run flash application that is very
similar to your post about wanting to save a snapshot of a local
webcam. Could you share your code for doing that or explain your
steps? I would like to have a webcam running then take a snapshot
of the webcam with a button and then email the saved snapshot. My
main interest is how you created the snapshot and button for it.
Thank you,
LeverLock2

Uh Oh... Major problem with iPad3 and BitmapData [HELP]

So.. I have some stageWebView elements that use BitMapData to capture a screenshot of the browser to allow for other elements to animate ontop of the browser ( sharing options, etc ).
When I capture this on the new iPad ... and add the bitmap to the stage the bitmap is zoomed in twice the size it should be. Its not capturing the true viewport. its zoomed in.
This is what I'm using to capture the bitmap.
     SocialbitmapData = new BitmapData(socialWebView.viewPort.width, socialWebView.viewPort.height);
     socialWebView.drawViewPortToBitmapData(SocialbitmapData);
     socialViewBitmap = new Bitmap(SocialbitmapData);
     addChild(socialViewBitmap);
Any help is appreciated

I'll try that
Just a note as well.   I wrote this solution ... works perfectly when tested from the IDE ..    copyPixels fails to display anything on iPad2 or iPad3
bitmapdataBrowser = new BitmapData(stage.stageWidth, stage.stageHeight);
               bitmapdataBrowser.draw(stage);
               bitmapDataA = new BitmapData(1024, 664);
               bitmapDataA.copyPixels(bitmapdataBrowser, new Rectangle(0, 42, 1024, 664), new Point(0, 0));
               var screenshot = new Bitmap(bitmapDataA);
               addChild(screenshot);
               screenshot.x = 0;
               screenshot.y = 42;

How to capture an image and save it using action script

Hello,
I need to know if is posible to capture an image or a screen region and save it using action scrip.
Somebody know how to do it ??
Thanks

you can capture an image using the bitmapdata class and getPixel(). you can then save that to a bitmap using server-side code like php.

BitmapData draw method doesn't work when the project is published as the .swf file of the web applic

Hi,
        I am totally confused by this strange error. When I tried using the draw method of BitmapData to draw a movieclip symbol of my project, it seems to work fine locally. However, as I uploaded the published .swf file to my web server and launched it as the plugin of my web application, it failed. The source codes as follows,
function printscreenClicked():void
     //ExternalInterface.call calls a javascript function to print message1
    var bd:BitmapData = new BitmapData(stage.width,stage.height);
    //ExternalInterface.call calls a javascript function to print message2
bd.draw(stage);
    //ExternalInterface.call calls a javascript function to print message3
message3 didn't show at all. Instead, the browser console shows "Uncaught Error: Error calling method on NPObject.". My understanding of this error message is that the .swf is calling something crashing, and I believe that bd.draw(stage)is the crashng method call.
Also, here is my html embed tag:
    <embed src="/tests/videoplayer.swf" id="flash" quality="high" height="510" width="990" scale="exactfit" name="squambido" align="middle" allowscriptaccess="always" allowfullscreen="true" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" style="margin: 0px auto;clear:both;position:relative;"/>
Can someone help me?

Thank you for your reply.
I tried stageWidth and stageHeight, but it still doesn't work.
The draw() methid is triggered when I clicked a screenshot button in my application as follows,
ExternalInterface.addCallback("printscreenClicked", printscreenClicked);
function printscreenClicked():void
     //ExternalInterface.call calls a javascript function to print message1
    var bd:BitmapData = new BitmapData(stage.width,stage.height);
    //ExternalInterface.call calls a javascript function to print message2
bd.draw(stage);
    //ExternalInterface.call calls a javascript function to print message3
Would you please give me an example of "waiting for Event.RESIZE is good, or just at least Event.ENTER_FRAME"?
My real purpose in this application is to capture a snapshot of a streaming video. The video is contained in a movieclip object. I tried stage first since BirmapData.draw() doesn't work when drawing the movieclip on the web site. Do you have any suggestion for this situation? Also, is there any good method to find out what happened if the browser have "Uncaught Error: Error calling method on NPObject."?

How to capture the screen in AS3

When I click on a button I want to capture the entire screen
and make it available in the background of the new frame I
display.How to do this?

You can use BitmapData.draw(objectGoesHere) method to capture
any display object as Bitmap.

Taking a screenshot of StageWebView for websites running a plugin?

I've been trying to take a screenshot of an instance of StageWebView for websites with embedded SWF and PDF content on the Android. The method drawViewPortToBitmapData works fine for regular websites after enabling hardware acceleration in the manifest.
//create a bitmap from the webview and display it
var bitmap_data:BitmapData = new BitmapData(stage.stageWidth - 2*WEBVIEWOFFSET, stage.stageHeight - 40 - WEBVIEWOFFSET);
webView.drawViewPortToBitmapData(bitmap_data);
//remove webview and display snapshot
webView.stage = null;
var webViewBitmap:Bitmap = new Bitmap(bitmap_data);
addChild(webViewBitmap);
The previous code works for embedded content only on the emulator in the Flash IDE. The image is generated in the folder I specified in Windows but on the Android a blank image is created instead.
The API states "The behavior of this method is not guaranteed for pages that contain plugin content (such as embedded PDF and SWF files)."
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/media/StageWebVie w.html#drawViewPortToBitmapData%28%29
I tried using Context3D instead:
var stage3D:Stage3D = webView.stage.stage3Ds[0];
stage3D.addEventListener(Event.CONTEXT3D_CREATE, context3dCreated);
stage3D.requestContext3D(Context3DRenderMode.AUTO);
function context3dCreated(evt:Event ):void {
    //context 3d creation handler
    var bitmap_data:BitmapData = new BitmapData(stage.stageWidth - 2*WEBVIEWOFFSET, stage.stageHeight - 40 - WEBVIEWOFFSET);
    var renderContext:Context3D = Stage3D(evt.target).context3D;
    trace("3D driver: " + renderContext.driverInfo);
    renderContext.drawToBitmapData(bitmap_data);
    renderContext.present();
    //remove webview and display snapshot
    webView.stage = null;
    var webViewBitmap:Bitmap = new Bitmap(bitmap_data);
    addChild(webViewBitmap);
but this approach only generates blank images on both the emulator and the device.
Does anybody know of a way to take a screenshot from a StageWebView displaying embedded SWF or PDF content? or is there a free native extension that can trigger the screenshot in Android (power + home)?

andylow wrote:
When I press shift + command + 4, I always go into this highlight-for-screenshot mode (good). However, if I'm attempting to screenshot something in a VMWare session, when I press my left mouse button to start highlighting, I can still manipulate the applications running in it. Ex: I press shift + command + 4, my mouse pointer changes, I then start my screen highlight by beginning over the top of the close button on an application. That application will close because I've clicked the close button.
This may not help, but what if you start creating the screenshot rectangle in a different corner than the upper left?

Capture StageWebView bitmapData?

Similar Messages

Maybe you are looking for