public static byte[] AsRgba8888(this IImageRead image)
{
switch (image.PixelFormat)
{
case PixelFormat.Indexed4: return(image.From4bpp(Rgba));
case PixelFormat.Indexed8: return(image.From8bpp(Rgba));
default:
throw new ArgumentException($"The pixel format {image.PixelFormat} is not supported.");
}
}