/// <summary>
/// Converts <see cref="NDArray"/> to a <see cref="Bitmap"/>.
/// </summary>
/// <param name="nd">The <see cref="NDArray"/> to copy pixels from, <see cref="Shape"/> is ignored completely. If nd.Unsafe.Shape.IsContiguous == false then a copy is made.</param>
/// <param name="width">The height of the <see cref="Bitmap"/></param>
/// <param name="height">The width of the <see cref="Bitmap"/></param>
/// <returns>A <see cref="Bitmap"/></returns>
/// <exception cref="ArgumentException">When nd.size != width*height, which means the ndarray be turned into the given bitmap size.</exception>
public static unsafe Bitmap ToBitmap(this NDArray nd, int width, int height)
{
if (nd == null)
{
throw new ArgumentNullException(nameof(nd));
}
if (width * height != nd.size)
{
throw new ArgumentException("Given nd.size != width*height");
}
if (!nd.Unsafe.Shape.IsContiguous)
{
nd = nd.Clone();
}
var ret = new Bitmap(height, width);
var bitdata = ret.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, PixelFormat.Format24bppRgb);
try
{
nd.CopyTo(new UnmanagedMemoryBlock <byte>((byte *)bitdata.Scan0, bitdata.Stride * bitdata.Height));
}
finally
{
ret.UnlockBits(bitdata);
}
return(ret);
}