public ValueTask ReadAsync(TiffPoint offset, TiffPixelBufferWriter <TPixel> destination, CancellationToken cancellationToken)
{
if (_flipLeftRight)
{
offset = new TiffPoint(offset.X, Height - offset.Y - destination.Height);
}
if (_flipTopBottom)
{
offset = new TiffPoint(Width - offset.X - destination.Width, offset.Y);
}
offset = new TiffPoint(offset.Y, offset.X);
destination = new TiffOrientedPixelBufferWriter <TPixel>(destination, _flipTopBottom, _flipLeftRight).AsPixelBufferWriter();
return(_reader.ReadAsync(offset, destination, cancellationToken));
}
public override void Dispose()
{
if (_innerHandle is null)
{
return;
}
Debug.Assert(_parent != null);
_innerHandle.GetSpan().Reverse();
_innerHandle.Dispose();
TiffOrientedPixelBufferWriter <TPixel> parent = _parent !;
_parent = null;
_innerHandle = null;
Interlocked.CompareExchange(ref parent._cachedHandle, this, null);
}
internal void SetHandle(TiffOrientedPixelBufferWriter <TPixel> parent, TiffPixelSpanHandle <TPixel> handle)
{
_parent = parent;
_innerHandle = handle;
_length = handle.Length;
}
