public static async Task <int> Merge(FileInfo[] source, FileInfo output, CancellationToken cancellationToken)
{
if (source is null || source.Length == 0)
{
Console.WriteLine("Input TIFF file are not specified.");
return(1);
}
if (output is null)
{
Console.WriteLine("Output TIFF file is not specified");
return(1);
}
await using TiffFileWriter writer = await TiffFileWriter.OpenAsync(output.FullName);
TiffStreamOffset fistIfdOffset = default;
TiffStreamOffset previousIfdOffset = default;
foreach (FileInfo sourceFile in source)
{
await using TiffFileReader reader = await TiffFileReader.OpenAsync(sourceFile.FullName);
await using TiffFileContentReader contentReader = await reader.CreateContentReaderAsync();
await using TiffFieldReader fieldReader = await reader.CreateFieldReaderAsync(cancellationToken);
TiffStreamOffset inputIfdOffset = reader.FirstImageFileDirectoryOffset;
while (!inputIfdOffset.IsZero)
{
TiffImageFileDirectory ifd = await reader.ReadImageFileDirectoryAsync(inputIfdOffset, cancellationToken);
using (TiffImageFileDirectoryWriter ifdWriter = writer.CreateImageFileDirectory())
{
await CopyIfdAsync(contentReader, fieldReader, ifd, ifdWriter, cancellationToken);
previousIfdOffset = await ifdWriter.FlushAsync(previousIfdOffset);
if (fistIfdOffset.IsZero)
{
fistIfdOffset = previousIfdOffset;
}
}
inputIfdOffset = ifd.NextOffset;
}
}
writer.SetFirstImageFileDirectoryOffset(fistIfdOffset);
await writer.FlushAsync();
return(0);
}