internal static GifBlock ReadBlock(
Stream stream,
IEnumerable <GifExtension> controlExtensions,
bool metadataOnly)
{
int blockId = stream.ReadByte();
if (blockId < 0)
{
throw GifHelpers.UnexpectedEndOfStreamException();
}
if (blockId == 33)
{
return((GifBlock)GifExtension.ReadExtension(stream, controlExtensions, metadataOnly));
}
if (blockId == 44)
{
return((GifBlock)GifFrame.ReadFrame(stream, controlExtensions, metadataOnly));
}
if (blockId == 59)
{
return((GifBlock)GifTrailer.ReadTrailer());
}
throw GifHelpers.UnknownBlockTypeException(blockId);
}
