/// <inheritdoc/>
public Image <TPixel> Decode <TPixel>(BufferedReadStream stream, CancellationToken cancellationToken)
where TPixel : unmanaged, IPixel <TPixel>
{
this.inputStream = stream;
var reader = new DirectoryReader(stream);
IEnumerable <ExifProfile> directories = reader.Read();
this.byteOrder = reader.ByteOrder;
var frames = new List <ImageFrame <TPixel> >();
foreach (ExifProfile ifd in directories)
{
cancellationToken.ThrowIfCancellationRequested();
ImageFrame <TPixel> frame = this.DecodeFrame <TPixel>(ifd, cancellationToken);
frames.Add(frame);
}
ImageMetadata metadata = TiffDecoderMetadataCreator.Create(frames, this.ignoreMetadata, reader.ByteOrder);
// TODO: Tiff frames can have different sizes
ImageFrame <TPixel> root = frames[0];
this.Dimensions = root.Size();
foreach (ImageFrame <TPixel> frame in frames)
{
if (frame.Size() != root.Size())
{
TiffThrowHelper.ThrowNotSupported("Images with different sizes are not supported");
}
}
return(new Image <TPixel>(this.Configuration, metadata, frames));
}
/// <inheritdoc/>
public IImageInfo Identify(BufferedReadStream stream, CancellationToken cancellationToken)
{
this.inputStream = stream;
var reader = new DirectoryReader(stream, this.Configuration.MemoryAllocator);
IEnumerable <ExifProfile> directories = reader.Read();
ExifProfile rootFrameExifProfile = directories.First();
var rootMetadata = TiffFrameMetadata.Parse(rootFrameExifProfile);
ImageMetadata metadata = TiffDecoderMetadataCreator.Create(reader.ByteOrder, reader.IsBigTiff, rootFrameExifProfile);
int width = GetImageWidth(rootFrameExifProfile);
int height = GetImageHeight(rootFrameExifProfile);
return(new ImageInfo(new PixelTypeInfo((int)rootMetadata.BitsPerPixel), width, height, metadata));
}