public SpriteImage(string fileName, Color alfaColor)
{
ImageInformation imageInfo = TextureLoader.ImageInformationFromFile(fileName);
this.size = new Size(imageInfo.Width, imageInfo.Height);
this.texture = TextureLoader.FromFile(
Game.renderDevice, fileName,
0, 0, 1,
Usage.None, Format.Unknown, Pool.Managed,
Filter.None, Filter.None, alfaColor.ToArgb()
);
}