Struct IfdIndex 

pub struct IfdIndex(/* private fields */);

Index of an IFD (Image File Directory) within an EXIF blob.

0 = main image (IfdIndex::MAIN), 1 = thumbnail (IfdIndex::THUMBNAIL), >=2 = sub-IFDs in the order encountered. Use the constants for the common cases and IfdIndex::new for raw indexing.

Implementations

impl IfdIndex

pub const MAIN: Self

Index of the main image IFD (always 0).

pub const THUMBNAIL: Self

Index of the thumbnail IFD (1 when present).

pub const fn new(index: usize) -> Self

Construct from a raw index. 0/1 correspond to Self::MAIN / Self::THUMBNAIL; values >= 2 are sub-IFDs.

pub const fn as_usize(self) -> usize

Underlying raw index as a usize.

Trait Implementations

impl Clone for IfdIndex

fn clone(&self) -> IfdIndex

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IfdIndex

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for IfdIndex

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for IfdIndex

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

Formats the value using the given formatter.

impl Hash for IfdIndex

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for IfdIndex

fn cmp(&self, other: &IfdIndex) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for IfdIndex

fn eq(&self, other: &IfdIndex) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for IfdIndex

fn partial_cmp(&self, other: &IfdIndex) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for IfdIndex

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for IfdIndex

impl Eq for IfdIndex

impl StructuralPartialEq for IfdIndex