Exemplo n.º 1
0
        /// <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));
        }
Exemplo n.º 2
0
        /// <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));
        }