public override Span <TPixel> GetSpan()
{
if (_innerHandle is null)
{
throw new ObjectDisposedException(GetType().FullName);
}
return(_innerHandle.GetSpan());
}
public override Span <TSource> GetSpan()
{
if (_innerHandle is null)
{
throw new ObjectDisposedException(GetType().FullName);
}
return(MemoryMarshal.Cast <TDestination, TSource>(_innerHandle.GetSpan()));
}
/// <inheritdoc />
public ValueTask ReadAsync(TiffPoint offset, TiffPixelBufferWriter <TPixel> destination, CancellationToken cancellationToken)
{
if (offset.X >= (uint)_size.Width || offset.Y >= (uint)_size.Height)
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
int width = Math.Min(_size.Width - offset.X, destination.Width);
int height = Math.Min(_size.Height - offset.Y, destination.Height);
ReadOnlySpan <TPixel> buffer = _buffer.GetReadOnlySpan();
int bufferWidth = _size.Width;
for (int row = 0; row < height; row++)
{
ReadOnlySpan <TPixel> sourceSpan = buffer.Slice(bufferWidth * (offset.Y + row) + offset.X, width);
using TiffPixelSpanHandle <TPixel> destinationHandle = destination.GetRowSpan(row);
sourceSpan.CopyTo(destinationHandle.GetSpan());
}
return(default);