Function image::codecs::webp::decoder::read_chunk

pub(crate) fn read_chunk<R>(
    r: &mut R
) -> ImageResult<Option<(Cursor<Vec<u8>>, WebPRiffChunk)>>where
    R: Read,

Reads a chunk Returns an error if the chunk header is not a valid webp header or some other reading error Returns None if and only if we hit end of file reading the four character code of the chunk