Neko BitmapData Bongo Madness

nekoBitmapData.hx

// due to Neko's 31 bit integers and other nonsense, when you set a bitmap data's alpha value 
// through Neko and then read it back out, the number ranges from -127 to 127 rather than from
// 0 to 255. Bongo madness. To unbongo, convert as follows:

var bitmapData = new BitmapData(1, 1, true, {rgb:0, a:0});
for (i in 0...256)
{
	bitmapData.setPixel32(0, 0, {rgb:0xFFFFFF, a:i});
	var alpha = bitmapData.getPixel32(0, 0).a;
	var converted = alpha < 0 ? 255 + alpha : alpha;
	trace(i + ": " + alpha + " -> " + converted);
}

// i == converted