Struct Directory 

pub struct Directory { /* private fields */ }

A parsed image file directory.

Implementations

impl Directory

pub fn parse(data: &[u8], order: ByteOrder, offset: usize) -> Result<Self>

Parse the IFD at offset within data.

Errors

Returns PixelsError::Malformed for a directory that runs past the end of the data or declares an implausible value count.

pub fn get(&self, tag: u16) -> Option<&Entry>

The entry for tag, if present.

pub fn value(&self, tag: u16) -> Option<u32>

The first value of tag, if present.

pub fn value_or(&self, tag: u16, default: u32) -> u32

The first value of tag, or default if absent.

pub fn values(&self, tag: u16) -> &[u32]

Every value of tag, or an empty slice if absent.

pub fn require(&self, tag: u16, name: &str) -> Result<u32>

The first value of tag, or a malformed-input error naming it.

Errors

Returns PixelsError::Malformed if the tag is absent or empty.

pub const fn next_offset(&self) -> Option<u32>

The offset of the next directory, or None if this is the last.

pub fn len(&self) -> usize

How many entries the directory holds.

pub fn is_empty(&self) -> bool

Whether the directory is empty.

Trait Implementations

impl Clone for Directory

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Directory

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.