CODEWITHSUNDEEP
performanceactionscript-3flashairbitmap
Liam Flaherty
Liam Flaherty

Reputation: 337

AS3 bitmapData.Draw is very inefficient

I am using ActionScript 3 in Flash CS6 with Adobe AIR 3.4

I am trying to load an image from the file system into a Bitmap.

My current code is:

var loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadComplete);
loader.load(new URLRequest("assets\\" + filename));

private function loadComplete(e:Event):void
{
    //add to bitmap
    bitmap = new Bitmap();
    bitmap.bitmapData = new BitmapData(loader.width, loader.height, true, 0x000000);

    bitmap.bitmapData.draw(loader);
}

However there is very inefficient performance at bitmapData.draw (the image is 2048x1536). I have tried:

bitmap.bitmapData = e.target.content.bitmapData;

However it does not affect the performance. And is still very slow.

How can I load the image in the loader into a Bitmap without having such slow performance.

Upvotes: 0

Views: 1788

Answers (1)

frankhermes - Stop OpenAI
frankhermes - Stop OpenAI

Reputation: 4870

When you load an image with a Loader, you already get a Bitmap. So why do you draw() into another one?

Just do this:

private function loadComplete(event:Event):void
{
    bitmap = loader.contentLoaderInfo.content as Bitmap;
}

Upvotes: 3

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