public override void Dispose()
{
_innerHandle?.Dispose();
_innerHandle = null;
if (_parent != null)
{
TiffPassthroughPixelBufferWriter <TSource, TDestination> parent = _parent;
_parent = null;
Interlocked.CompareExchange(ref parent._cachedHandle, this, null);
}
}
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);
}
/// <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);
public TiffPixelSpanHandle <TPixel> GetColumnSpan(int colIndex, int start, int length)
{
int width = _writer.Width, height = _writer.Height;
int rowIndex = colIndex;
if ((uint)rowIndex >= (uint)height)
{
throw new ArgumentOutOfRangeException(nameof(colIndex));
}
if ((uint)start >= (uint)width)
{
throw new ArgumentOutOfRangeException(nameof(start));
}
if (length < 0 || (uint)(start + length) > (uint)width)
{
throw new ArgumentOutOfRangeException(nameof(length));
}
if (_flipTopBottom)
{
rowIndex = height - rowIndex - 1;
}
if (!_flipLeftRight)
{
return(_writer.GetRowSpan(rowIndex, start, length));
}
TiffPixelSpanHandle <TPixel> innerHandle = _writer.GetRowSpan(rowIndex, width - start - length, length);
FlippedHandle?handle = Interlocked.Exchange(ref _cachedHandle, null);
if (handle is null)
{
handle = new FlippedHandle();
}
handle.SetHandle(this, innerHandle);
return(handle);
}
internal void SetHandle(TiffOrientedPixelBufferWriter <TPixel> parent, TiffPixelSpanHandle <TPixel> handle)
{
_parent = parent;
_innerHandle = handle;
_length = handle.Length;
}
internal void SetHandle(TiffPassthroughPixelBufferWriter <TSource, TDestination> parent, TiffPixelSpanHandle <TDestination> handle, int length)
{
_parent = parent;
_innerHandle = handle;
_length = length;
}
