Glad my blog entry helped. :-)
You can use the as3 PNGEncoder or JPGEncoder libraries at
http://code.google.com/p/as3corelib/ to do the image format conversion
within the flex application. You can post it to a server using either
remoting, web service, or http service. Remoting/AMF3 is fastest and
easiest, but the other methods work well too. Remoting does not require
any base64 conversion for the binary data; you can send it "across the
wire" as is.
-Andy
This is from a previous post I wrote here on flexcoders...
If you are using AMF3 (RemoteObject), you can serialize binary data
without any conversion. If you are trying a standard HTTP post, I would
use a HTTPService with the method= "POST". Then you have to Base64
encode the binary data and attach it to the parameters of the http
service. On the server side, you will need to decode the base64 encoded
data back into binary.
Example:
<mx:HTTPService
id="httpService"
showBusyCursor="true"
useProxy="false"
method="POST"
resultFormat="text"
url="/BinaryData/cf/HTTPImageSave.cfm"
result="onResult('Data Saved via mx:HTTPService')"
fault="onFault(event)" />
private function base64Encode( data : ByteArray ) : String
{
var encoder : Base64Encoder = new Base64Encoder();
encoder.encodeBytes( data );
return encoder.flush();
}
private function sendData() : void
{
var data : ByteArray = encoder.encode( myPngByteArray );
var params : Object = { data : base64Encode( data ) };
httpService.send( params );
}
In ColdFusion, you can decode the base64 data simply by using the
"toBinary" function. Other languages have similar functions as well.
Just a FYI... using the JPG instead of PNG requires significantly less
bandwidth & time to post the data to the server. Base64 encoding the
data also increases the size of the data being transferred "across the
wire". It is much more efficient to use a remoteObject method with
JPG-compressed data.
_____________________________________
Andrew Trice
Cynergy Systems, Inc.
http://www.cynergysystems.com
Blog: http://www.cynergysystems.com/blogs/page/andrewtrice
Email: [EMAIL PROTECTED]
Office: 866-CYNERGY
________________________________
From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of Paul Whitelock
Sent: Wednesday, February 14, 2007 1:51 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Re: Exporting Charts as Image
Thanks Brendan! I was indeed looking in the Language Reference
documents which is why I couldn't find anything.
In the last section of the Andrew Trice tutorial he's doing pretty
much what I'd like to do, but he doesn't supply the source. The piece
that I think I need is how to handle the data sent from Flex on the
ColdFusion side (i.e., how to create the JPG from a ByteArray sent
from Flex). Has anyone seen any tutorials or documentation on this?
Paul
--- In flexcoders@yahoogroups.com <mailto:flexcoders%40yahoogroups.com>
, "Brendan Meutzner" <[EMAIL PROTECTED]>
wrote:
>
> Hey Paul,
>
> It's in there... just not shown in the Language Reference documents if
> that's where you're looking... check out
>
> corelib\src\trunk\src\actionscript3\com\adobe\images
>
> Andrew Trice also has a tutorial on capturing UI to bitmap on his
blog here:
>
>
http://www.cynergysystems.com/blogs/page/andrewtrice?entry=flex_2_bitmap
data_tricks_and
<http://www.cynergysystems.com/blogs/page/andrewtrice?entry=flex_2_bitma
pdata_tricks_and>
>
>
> Brendan
