Struct TiffMetadataReader 

pub struct TiffMetadataReader { /* private fields */ }

Entry point to reading TIFF metadata.

This is a stateful reader because we don’t know how many IFDs will be encountered.

// fetch implements MetadataFetch
let mut metadata_reader = TiffMetadataReader::try_open(&fetch).await?;
let ifds = metadata_reader.read_all_ifds(&fetch).await?;

Implementations

impl TiffMetadataReader

pub async fn try_open<F: MetadataFetch>(fetch: &F) -> AsyncTiffResult<Self>

Open a new TIFF file, validating the magic bytes, reading the endianness, and checking for the bigtiff flag.

This does not read any IFD metadata.

pub fn endianness(&self) -> Endianness

Returns the endianness of the file.

pub fn bigtiff(&self) -> bool

Returns true if this is a bigtiff file.

pub fn has_next_ifd(&self) -> bool

Returns true if there are more IFDs to read.

pub fn next_ifd_offset(&self) -> Option<u64>

The byte offset of the start of the next IFD.

This will be None if all IFDs have already been read.

pub async fn read_next_ifd<F: MetadataFetch>( &mut self, fetch: &F, ) -> AsyncTiffResult<Option<ImageFileDirectory>>

Read the next IFD from the file.

If there are no more IFDs, returns None.

pub async fn read_all_ifds<F: MetadataFetch>( &mut self, fetch: &F, ) -> AsyncTiffResult<Vec<ImageFileDirectory>>

Read all IFDs from the file.

pub async fn read<F: MetadataFetch>( &mut self, fetch: &F, ) -> AsyncTiffResult<TIFF>

Read all IFDs from the file and return a complete TIFF structure.