WebPLoader

Asynchronous Loading using the WebPLoader

To load a WebP file asynchronously is a simple matter of using the WebPLoader. Firstly you create a new loader using the WebP.service.createLoader() function. This gives you access to a WebPLoader instance which you can then attach event listeners for

• WebPLoaderEvent.COMPLETE
• WebPErrorEvent.ERROR

To start the load simply call load on the loader and wait for one of the above events to fire.

Example

var loader:WebPLoader = WebP.service.createLoader();
            
loader.addEventListener( WebPLoaderEvent.COMPLETE, loader_completeHandler );
loader.addEventListener( WebPErrorEvent.ERROR, loader_errorHandler );
            
var success:Boolean = loader.load( file.url );
            
trace( "loader.load( " + file.url + " ) = " + success );

Then in your event handlers:

private function loader_completeHandler( event:WebPLoaderEvent ):void
{
    trace( "loader complete" );
    displayBitmapData( event.data.convertToBitmapData() );
    
    var loader:WebPLoader = WebPLoader(event.currentTarget);
    loader.removeEventListener( WebPLoaderEvent.COMPLETE, loader_completeHandler );
    loader.removeEventListener( WebPErrorEvent.ERROR, loader_errorHandler );
    loader.dispose();
}

private function loader_errorHandler( event:WebPErrorEvent ):void
{
    trace( "loader error ::["+event.code+"] "+event.error );
    
    var loader:WebPLoader = WebPLoader(event.currentTarget);
    loader.removeEventListener( WebPLoaderEvent.COMPLETE, loader_completeHandler );
    loader.removeEventListener( WebPErrorEvent.ERROR, loader_errorHandler );
    loader.dispose();
}