Struct Orientation 

pub struct Orientation {
    pub rotation: Rotation,
    pub mirror: bool,
}

How to show a decoded picture upright: mirror it left to right when mirror is set, then turn it clockwise by rotation.

The two together reach every orientation a container or an image can declare: the eight of the Exif Orientation tag, every display matrix whose angle is a multiple of 90 degrees, a Matroska projection’s pose. A binding converts its source’s own statement to this one; FFmpeg’s display matrix mirrors after it rotates, and counter-clockwise.

Fields

rotation: Rotation

Clockwise rotation, applied after the mirror.

mirror: bool

Whether the stored picture is mirrored left to right before it turns.

Implementations

impl Orientation

pub const UPRIGHT: Self

Shown as stored.

pub const fn rotated(rotation: Rotation) -> Self

A rotation without a mirror.

pub const fn from_exif(value: u16) -> Option<Self>

The orientation an Exif Orientation value (1 to 8) declares; None for any other value. 2, 4, 5, and 7 mirror.

pub const fn is_upright(self) -> bool

Whether the picture is shown as stored.

pub const fn displayed_size(self, width: u32, height: u32) -> (u32, u32)

The displayed size of a stored width x height picture.

Trait Implementations

impl Clone for Orientation

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Orientation

impl Debug for Orientation

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

Formats the value using the given formatter.

impl Default for Orientation

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Orientation

impl Hash for Orientation

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 PartialEq for Orientation

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Orientation