/// <summary>
/// Copy the 2-dimensional pixel data into <paramref name="destination"/>, after skipping some rows and columns specified in <paramref name="offset"/>.
/// </summary>
/// <param name="offset">The number rows and columns to skip. X represents the number of columns to skip; Y represents the number of rows to skip.</param>
/// <param name="destination">The destination writer. It also limits the number of rows and columns to copy.</param>
/// <param name="cancellationToken">A <see cref="CancellationToken"/> that fires if the user want to stop the current task.</param>
/// <returns>A <see cref="ValueTask"/> that completes when all the requested pixels are copied.</returns>
public ValueTask ReadAsync(TiffPoint offset, TiffPixelBufferWriter <TPixel> destination, CancellationToken cancellationToken)
{
offset = new TiffPoint(offset.X + _offset.X, offset.Y + _offset.Y);
var readSize = new TiffSize(Math.Min(_size.Width, destination.Width), Math.Min(_size.Height, destination.Height));
if (readSize.IsAreaEmpty)
{
return(default);
