Setting a default encoder for the ImageSnapshot class in Flex 3

The following example shows how you can set the ImageSnapshot class’s static defaultEncoder property in Flex 3 to set a default image encoder for captured images.

Full code after the jump.

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/12/08/setting-a-default-encoder-for-the-imagesnapshot-class-in-flex-3/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white"
        creationComplete="init();">

    <mx:Script>
        <![CDATA[
            import mx.graphics.ImageSnapshot;
            import mx.graphics.codec.*;

            private function init():void {
                ImageSnapshot.defaultEncoder = PNGEncoder;
            }

            private function captureImg():void {
                var ohSnap:ImageSnapshot = ImageSnapshot.captureImage(img);
                textArea.text = ImageSnapshot.encodeImageAsBase64(ohSnap);
                lbl.text = ohSnap.contentType;
            }
        ]]>
    </mx:Script>

    <mx:ApplicationControlBar dock="true">
        <mx:Button id="button"
                label="Capture Image"
                click="captureImg();" />
    </mx:ApplicationControlBar>

    <mx:Form>
        <mx:FormItem label="source:">
            <mx:Image id="img"
                    source="@Embed('images/flex_logo.jpg')" />
        </mx:FormItem>
        <mx:FormItem label="Base64:">
            <mx:TextArea id="textArea"
                    editable="false"
                    width="320"
                    height="160" />
        </mx:FormItem>
        <mx:FormItem label="contentType:">
            <mx:Label id="lbl" />
        </mx:FormItem>
    </mx:Form>

</mx:Application>

View source is enabled in the following example.

Tagged as: captureImage(), defaultEncoder, encodeImageAsBase64()