/// <inheritdoc />
public ValueTask InvokeAsync(TiffImageDecoderContext context, ITiffImageDecoderPipelineNode next)
{
if (context is null)
{
throw new ArgumentNullException(nameof(context));
}
if (next is null)
{
throw new ArgumentNullException(nameof(next));
}
int bytesPerScanline = 8 * context.SourceImageSize.Width;
Memory <byte> source = context.UncompressedData.Slice(context.SourceReadOffset.Y * bytesPerScanline);
ReadOnlySpan <TiffCmyk64> cmykSourceSpan = MemoryMarshal.Cast <byte, TiffCmyk64>(source.Span);
using TiffPixelBufferWriter <TiffCmyk64> writer = context.GetWriter <TiffCmyk64>();
int rows = context.ReadSize.Height;
if (context.IsLittleEndian == BitConverter.IsLittleEndian)
{
for (int row = 0; row < rows; row++)
{
using TiffPixelSpanHandle <TiffCmyk64> pixelSpanHandle = writer.GetRowSpan(row);
cmykSourceSpan.Slice(context.SourceReadOffset.X, context.ReadSize.Width).CopyTo(pixelSpanHandle.GetSpan());
cmykSourceSpan = cmykSourceSpan.Slice(context.SourceImageSize.Width);
}
}
else
{
int cols = context.ReadSize.Width;
for (int row = 0; row < rows; row++)
{
using TiffPixelSpanHandle <TiffCmyk64> pixelSpanHandle = writer.GetRowSpan(row);
Span <TiffCmyk64> rowDestinationSpan = pixelSpanHandle.GetSpan();
for (int col = 0; col < cols; col++)
{
TiffCmyk64 cmyk = cmykSourceSpan[col];
cmyk.C = BinaryPrimitives.ReverseEndianness(cmyk.C);
cmyk.M = BinaryPrimitives.ReverseEndianness(cmyk.M);
cmyk.Y = BinaryPrimitives.ReverseEndianness(cmyk.Y);
cmyk.K = BinaryPrimitives.ReverseEndianness(cmyk.K);
rowDestinationSpan[col] = cmyk;
}
cmykSourceSpan = cmykSourceSpan.Slice(context.SourceImageSize.Width);
}
}
return(next.RunAsync(context));
}
public void TestCmyk64()
{
Assert.Equal(8, Unsafe.SizeOf <TiffCmyk64>());
var defaultPixel = default(TiffCmyk64);
Assert.Equal(0, defaultPixel.C);
Assert.Equal(0, defaultPixel.M);
Assert.Equal(0, defaultPixel.Y);
Assert.Equal(0, defaultPixel.K);
var pixel1 = new TiffCmyk64(0x1221, 0x3443, 0x5665, 0x7887);
Assert.Equal(0x1221, pixel1.C);
Assert.Equal(0x3443, pixel1.M);
Assert.Equal(0x5665, pixel1.Y);
Assert.Equal(0x7887, pixel1.K);
Assert.False(pixel1.Equals(defaultPixel));
Assert.False(defaultPixel.Equals(pixel1));
Assert.False(pixel1 == defaultPixel);
Assert.False(defaultPixel == pixel1);
Assert.True(pixel1 != defaultPixel);
Assert.True(defaultPixel != pixel1);
Assert.False(pixel1.GetHashCode() == defaultPixel.GetHashCode());
var pixel2 = new TiffCmyk64(0x1221, 0x3443, 0x5665, 0x7887);
Assert.True(pixel1.Equals(pixel2));
Assert.True(pixel2.Equals(pixel1));
Assert.True(pixel1 == pixel2);
Assert.True(pixel2 == pixel1);
Assert.False(pixel1 != pixel2);
Assert.False(pixel2 != pixel1);
Assert.True(pixel1.GetHashCode() == pixel2.GetHashCode());
}
