Code I used to load images into bitmaps very quickly

gistfile1.hx

	private function load_frames(id:String, scalex:Float, scaley:Float = -1, fx:String = "default"):Array<Frame>
	{
		if (scaley == -1) scaley = scalex;
		scalex = Math.floor(scalex * 1000.0) / 1000.0;
		scaley = Math.floor(scaley * 1000.0) / 1000.0;
		// scan local cache first
		var file_name = 'img_${id}_${scalex}_${scaley}_v1.anim';
		var file = cache_dir.resolvePath(file_name);
		if (file.exists)
		{
			var load_stream = new FileStream();
			load_stream.open(file, FileMode.READ);
			var data = new ByteArray();
			load_stream.readBytes(data);
			//data.uncompress();
			load_stream.close();
			// parse the cache
			var frame_count = data.readInt();
			var ret = new Array<Frame>();
			for (i in 0...frame_count)
			{
				var fr = new Frame();
				fr.offx = data.readInt();
				fr.offy = data.readInt();
				fr.originalw = data.readInt();
				fr.originalh = data.readInt();
				var bmpw = data.readInt();
				var bmph = data.readInt();
				fr.bmp = new BitmapData(bmpw, bmph, true, 0);
				fr.bmp.setPixels(fr.bmp.rect, data);
				ret.push(fr);
			}
			return ret;
		}
		else
		{
			var mc = get_swf(id);
			var ret = Utils.swf_to_frames(mc, true, scalex, scaley, fx);
			// store in the cache
			var data = new ByteArray();
			data.writeInt(ret.length);
			for (i in 0...ret.length)
			{
				var fr = ret[i];
				data.writeInt(Std.int(fr.offx));
				data.writeInt(Std.int(fr.offy));
				data.writeInt(Std.int(fr.originalw));
				data.writeInt(Std.int(fr.originalh));
				data.writeInt(fr.bmp.width);
				data.writeInt(fr.bmp.height);
				data.writeBytes(fr.bmp.getPixels(fr.bmp.rect));
			}
			//data.compress();
			var save_stream = new FileStream();
			save_stream.open(file, FileMode.WRITE);
			save_stream.writeBytes(data);
			save_stream.close();
			return ret;
		}
	}