public ValueTask ReadAsync(TiffPoint offset, TiffPixelBufferWriter <TDestination> destination, CancellationToken cancellationToken)
{
ITiffPixelBufferWriter <TDestination> destinationWriter = TiffPixelBufferUnsafeMarshal.GetBuffer(destination, out TiffPoint destinationOffset, out TiffSize size);
TiffPixelBufferWriter <TSource> newDestination = new TiffPassthroughPixelBufferWriter <TSource, TDestination>(destinationWriter).AsPixelBufferWriter().Crop(destinationOffset, size);
return(_source.ReadAsync(offset, newDestination, cancellationToken));
}
public ValueTask ReadAsync(TiffPoint offset, TiffPixelBufferWriter <TTiffPixel> destination, CancellationToken cancellationToken)
{
ITiffPixelBufferWriter <TTiffPixel> destinationWriter = TiffPixelBufferUnsafeMarshal.GetBuffer(destination, out TiffPoint destinationOffset, out TiffSize size);
TiffPixelBufferWriter <TImageSharpPixel> newDestination = new ImageSharpConversionPixelBufferWriter <TImageSharpPixel, TIntermediate, TTiffPixel>(destinationWriter).AsPixelBufferWriter().Crop(destinationOffset, size);
return(_source.ReadAsync(offset, newDestination, cancellationToken));
}
public void TestCrop()
{
ITiffPixelBuffer <TiffGray8> pixelBuffer = PixelBufferTests.InitializePixelBuffer(out TiffGray8[] pixels);
var writer = new TiffPixelBufferWriterAdapter <TiffGray8>(pixelBuffer);
TiffPixelBufferWriter <TiffGray8> structWriter = writer.AsPixelBufferWriter();
Assert.Equal(3, structWriter.Width);
Assert.Equal(2, structWriter.Height);
Assert.False(structWriter.IsEmpty);
Assert.Throws <ArgumentOutOfRangeException>("offset", () => structWriter.Crop(new TiffPoint(4, 0)));
Assert.Throws <ArgumentOutOfRangeException>("offset", () => structWriter.Crop(new TiffPoint(0, 3)));
Assert.Throws <ArgumentOutOfRangeException>("offset", () => structWriter.Crop(new TiffPoint(4, 3)));
Assert.Throws <ArgumentOutOfRangeException>("size", () => structWriter.Crop(new TiffPoint(0, 0), new TiffSize(4, 1)));
Assert.Throws <ArgumentOutOfRangeException>("size", () => structWriter.Crop(new TiffPoint(0, 0), new TiffSize(1, 3)));
Assert.Throws <ArgumentOutOfRangeException>("size", () => structWriter.Crop(new TiffPoint(0, 0), new TiffSize(4, 3)));
structWriter = writer.Crop(new TiffPoint(1, 1), new TiffSize(1, 1));
Assert.Equal(1, structWriter.Width);
Assert.Equal(1, structWriter.Height);
structWriter = writer.AsPixelBufferWriter().Crop(new TiffPoint(1, 1), new TiffSize(1, 1));
Assert.Equal(1, structWriter.Width);
Assert.Equal(1, structWriter.Height);
structWriter = writer.Crop(new TiffPoint(1, 1));
Assert.Equal(2, structWriter.Width);
Assert.Equal(1, structWriter.Height);
structWriter = writer.AsPixelBufferWriter().Crop(new TiffPoint(1, 1));
Assert.Equal(2, structWriter.Width);
Assert.Equal(1, structWriter.Height);
Assert.Throws <ArgumentOutOfRangeException>("rowIndex", () => structWriter.GetRowSpan(-1, 0, 1));
Assert.Throws <ArgumentOutOfRangeException>("rowIndex", () => structWriter.GetRowSpan(2, 0, 1));
Assert.Throws <ArgumentOutOfRangeException>("start", () => structWriter.GetRowSpan(0, -1, 1));
Assert.Throws <ArgumentOutOfRangeException>("start", () => structWriter.GetRowSpan(0, 3, 1));
Assert.Throws <ArgumentOutOfRangeException>("length", () => structWriter.GetRowSpan(0, 1, -1));
Assert.Throws <ArgumentOutOfRangeException>("length", () => structWriter.GetRowSpan(0, 1, 2));
Assert.Throws <ArgumentOutOfRangeException>("colIndex", () => structWriter.GetColumnSpan(-1, 0, 1));
Assert.Throws <ArgumentOutOfRangeException>("colIndex", () => structWriter.GetColumnSpan(2, 0, 1));
Assert.Throws <ArgumentOutOfRangeException>("start", () => structWriter.GetColumnSpan(0, -1, 1));
Assert.Throws <ArgumentOutOfRangeException>("start", () => structWriter.GetColumnSpan(0, 2, 1));
Assert.Throws <ArgumentOutOfRangeException>("length", () => structWriter.GetColumnSpan(0, 1, -1));
Assert.Throws <ArgumentOutOfRangeException>("length", () => structWriter.GetColumnSpan(0, 1, 2));
ITiffPixelBufferWriter <TiffGray8> writer2 = TiffPixelBufferUnsafeMarshal.GetBuffer(structWriter, out TiffPoint offset, out TiffSize size);
Assert.True(ReferenceEquals(writer, writer2));
Assert.Equal(1, offset.X);
Assert.Equal(1, offset.Y);
Assert.Equal(2, size.Width);
Assert.Equal(1, size.Height);
}
/// <summary>
/// A function to get destination buffer in the specified pixel format.
/// </summary>
public sealed override TiffPixelBufferWriter <TPixel> GetWriter <TPixel>()
{
ITiffPixelConverterFactory?pixelConverterFactory = PixelConverterFactory;
if (pixelConverterFactory is null)
{
throw new InvalidOperationException("Failed to acquire PixelConverterFactory");
}
ITiffPixelBufferWriter <TDestinationPixel> buffer = TiffPixelBufferUnsafeMarshal.GetBuffer(DestinationWriter, out TiffPoint offset, out TiffSize size);
return(pixelConverterFactory.CreateConverter <TPixel, TDestinationPixel>(buffer).Crop(offset, size));
}
/// <summary>
/// Decode the image into the specified pixel buffer.
/// </summary>
/// <typeparam name="TPixel">The pixel type.</typeparam>
/// <param name="decoder">The image decoder.</param>
/// <param name="buffer">The pixel buffer to write pixels into.</param>
public static void Decode <TPixel>(this TiffImageDecoder decoder, TiffPixelBuffer <TPixel> buffer) where TPixel : unmanaged
{
if (decoder is null)
{
throw new ArgumentNullException(nameof(decoder));
}
if (buffer.IsEmpty)
{
return;
}
ITiffPixelBuffer <TPixel> innerBuffer = TiffPixelBufferUnsafeMarshal.GetBuffer(buffer, out TiffPoint offset, out TiffSize size);
decoder.Decode(default, size, offset, innerBuffer);
/// <summary>
/// Converts pixel buffer writer of any pixel format <typeparamref name="TBuffer"/> into <see cref="TiffPixelBufferWriter{TPixel}"/>.
/// </summary>
/// <typeparam name="TBuffer">The specified pixel type.</typeparam>
/// <param name="writer">The writer to be converted.</param>
/// <returns>The converted writer.</returns>
public override TiffPixelBufferWriter <TPixel> ConvertWriter <TBuffer>(TiffPixelBufferWriter <TBuffer> writer)
{
ITiffPixelConverterFactory?pixelConverterFactory = PixelConverterFactory;
if (pixelConverterFactory is null)
{
throw new InvalidOperationException("Failed to acquire PixelConverterFactory");
}
ITiffPixelBufferWriter <TBuffer> innerWriter = TiffPixelBufferUnsafeMarshal.GetBuffer(writer, out TiffPoint offset, out TiffSize size);
ITiffPixelBufferWriter <TPixel> converted = pixelConverterFactory.CreateConverter <TPixel, TBuffer>(innerWriter);
return(converted.Crop(offset, size));
}
/// <summary>
/// Decode the image into the specified pixel buffer.
/// </summary>
/// <typeparam name="TPixel">The pixel type.</typeparam>
/// <param name="decoder">The image decoder.</param>
/// <param name="buffer">The pixel buffer to write pixels into.</param>
/// <param name="cancellationToken">The <see cref="CancellationToken"/> that fires if the user has requested to abort the decoding pipeline.</param>
/// <returns>A <see cref="Task"/> that completes when the image has been decoded.</returns>
public static Task DecodeAsync <TPixel>(this TiffImageDecoder decoder, TiffPixelBuffer <TPixel> buffer, CancellationToken cancellationToken = default) where TPixel : unmanaged
{
if (decoder is null)
{
throw new ArgumentNullException(nameof(decoder));
}
if (buffer.IsEmpty)
{
return(Task.CompletedTask);
}
ITiffPixelBuffer <TPixel> innerBuffer = TiffPixelBufferUnsafeMarshal.GetBuffer(buffer, out TiffPoint offset, out TiffSize size);
return(decoder.DecodeAsync(default, size, offset, innerBuffer, cancellationToken));
public void TestCrop()
{
ITiffPixelBuffer <TiffGray8> pixelBuffer = InitializePixelBuffer(out TiffGray8[] pixels);
TiffPixelBuffer <TiffGray8> structBuffer = pixelBuffer.AsPixelBuffer();
Assert.Equal(3, structBuffer.Width);
Assert.Equal(2, structBuffer.Height);
Assert.False(structBuffer.IsEmpty);
Assert.Throws <ArgumentOutOfRangeException>("offset", () => structBuffer.Crop(new TiffPoint(4, 0)));
Assert.Throws <ArgumentOutOfRangeException>("offset", () => structBuffer.Crop(new TiffPoint(0, 3)));
Assert.Throws <ArgumentOutOfRangeException>("offset", () => structBuffer.Crop(new TiffPoint(4, 3)));
Assert.Throws <ArgumentOutOfRangeException>("size", () => structBuffer.Crop(new TiffPoint(0, 0), new TiffSize(4, 1)));
Assert.Throws <ArgumentOutOfRangeException>("size", () => structBuffer.Crop(new TiffPoint(0, 0), new TiffSize(1, 3)));
Assert.Throws <ArgumentOutOfRangeException>("size", () => structBuffer.Crop(new TiffPoint(0, 0), new TiffSize(4, 3)));
structBuffer = pixelBuffer.Crop(new TiffPoint(1, 1), new TiffSize(1, 1));
Assert.Equal(1, structBuffer.Width);
Assert.Equal(1, structBuffer.Height);
structBuffer = pixelBuffer.AsPixelBuffer().Crop(new TiffPoint(1, 1), new TiffSize(1, 1));
Assert.Equal(1, structBuffer.Width);
Assert.Equal(1, structBuffer.Height);
structBuffer = pixelBuffer.Crop(new TiffPoint(1, 1));
Assert.Equal(2, structBuffer.Width);
Assert.Equal(1, structBuffer.Height);
structBuffer = pixelBuffer.AsPixelBuffer().Crop(new TiffPoint(1, 1));
Assert.Equal(2, structBuffer.Width);
Assert.Equal(1, structBuffer.Height);
ITiffPixelBuffer <TiffGray8> pixelBuffer2 = TiffPixelBufferUnsafeMarshal.GetBuffer(structBuffer, out TiffPoint offset, out TiffSize size);
Assert.True(ReferenceEquals(pixelBuffer, pixelBuffer2));
Assert.Equal(1, offset.X);
Assert.Equal(1, offset.Y);
Assert.Equal(2, size.Width);
Assert.Equal(1, size.Height);
}