private void Read(Stream stream, IEnumerable <GifExtension> controlExtensions, bool metadataOnly)
{
// Note: at this point, the Image Separator (0x2C) has already been read
Descriptor = GifImageDescriptor.ReadImageDescriptor(stream);
if (Descriptor.HasLocalColorTable)
{
LocalColorTable = GifHelpers.ReadColorTable(stream, Descriptor.LocalColorTableSize);
}
ImageData = GifImageData.ReadImageData(stream, metadataOnly);
Extensions = controlExtensions.ToList().AsReadOnly();
}