public async ValueTask InvokeAsync(TiffImageEncoderContext <TPixel> context, ITiffImageEncoderPipelineNode <TPixel> next)
{
MemoryPool <byte> memoryPool = context.MemoryPool ?? MemoryPool <byte> .Shared;
TiffSize imageSize = context.ImageSize;
using (IMemoryOwner <byte> pixelData = memoryPool.Rent(imageSize.Width * imageSize.Height))
{
Memory <byte> pixelDataMemory = pixelData.Memory;
using (var writer = new TiffMemoryPixelBufferWriter <TiffMask>(memoryPool, pixelDataMemory, imageSize.Width, imageSize.Height))
using (TiffPixelBufferWriter <TPixel> convertedWriter = context.ConvertWriter(writer.AsPixelBufferWriter()))
{
await context.GetReader().ReadAsync(convertedWriter, context.CancellationToken).ConfigureAwait(false);
}
int count = PackBytesIntoBits(pixelDataMemory.Span, imageSize, _threshold);
context.PhotometricInterpretation = TiffPhotometricInterpretation.TransparencyMask;
context.BitsPerSample = TiffValueCollection.Single <ushort>(1);
context.UncompressedData = pixelData.Memory.Slice(0, count);
await next.RunAsync(context).ConfigureAwait(false);
context.UncompressedData = default;
}
TiffImageFileDirectoryWriter?ifdWriter = context.IfdWriter;
if (!(ifdWriter is null))
{
using (await context.LockAsync().ConfigureAwait(false))
{
await ifdWriter.WriteTagAsync(TiffTag.PhotometricInterpretation, TiffValueCollection.Single((ushort)context.PhotometricInterpretation)).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.BitsPerSample, context.BitsPerSample).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.FillOrder, TiffValueCollection.Single((ushort)TiffFillOrder.HigherOrderBitsFirst)).ConfigureAwait(false);
}
}
}
public async ValueTask InvokeAsync(TiffImageEncoderContext <TPixel> context, ITiffImageEncoderPipelineNode <TPixel> next)
{
MemoryPool <byte> memoryPool = context.MemoryPool ?? MemoryPool <byte> .Shared;
TiffSize imageSize = context.ImageSize;
int arraySize = 3 * imageSize.Width * imageSize.Height;
using (IMemoryOwner <byte> pixelData = memoryPool.Rent(arraySize))
{
using (var writer = new TiffMemoryPixelBufferWriter <TiffRgb24>(memoryPool, pixelData.Memory, imageSize.Width, imageSize.Height))
using (TiffPixelBufferWriter <TPixel> convertedWriter = context.ConvertWriter(writer.AsPixelBufferWriter()))
{
await context.GetReader().ReadAsync(convertedWriter, context.CancellationToken).ConfigureAwait(false);
}
context.PhotometricInterpretation = TiffPhotometricInterpretation.RGB;
context.BitsPerSample = TiffValueCollection.UnsafeWrap(s_bitsPerSample);
context.UncompressedData = pixelData.Memory.Slice(0, arraySize);
await next.RunAsync(context).ConfigureAwait(false);
context.UncompressedData = default;
}
TiffImageFileDirectoryWriter?ifdWriter = context.IfdWriter;
if (!(ifdWriter is null))
{
using (await context.LockAsync().ConfigureAwait(false))
{
await ifdWriter.WriteTagAsync(TiffTag.PhotometricInterpretation, TiffValueCollection.Single((ushort)context.PhotometricInterpretation)).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.BitsPerSample, context.BitsPerSample).ConfigureAwait(false);
await ifdWriter.WriteTagAsync(TiffTag.SamplesPerPixel, TiffValueCollection.Single <ushort>(3)).ConfigureAwait(false);
}
}
}
