Enum Quarter 

pub enum Quarter {
    None,
    Clockwise90,
    Half,
    Clockwise270,
}

A quarter-turn rotation, clockwise.

Variants

None

No rotation.

Clockwise90

90 degrees clockwise.

Half

180 degrees.

Clockwise270

270 degrees clockwise, i.e. 90 anticlockwise.

Implementations

impl Quarter

pub fn from_degrees(degrees: i32) -> Result<Quarter, PixelsError>

The rotation for degrees, which must be a multiple of 90.

Negative and out-of-range angles are normalized, so -90 and 270 are the same rotation.

Errors

Returns PixelsError::InvalidArgument if degrees is not a multiple of 90. Rounding to the nearest quarter turn would silently rotate an image differently from what was asked.

pub const fn transposes(self) -> bool

Whether this rotation exchanges width and height.

pub const fn inverse(self) -> Quarter

The rotation that undoes this one.

Trait Implementations

impl Clone for Quarter

fn clone(&self) -> Quarter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Quarter

impl Debug for Quarter

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

Formats the value using the given formatter.

impl Default for Quarter

fn default() -> Quarter

Returns the “default value” for a type.

impl Eq for Quarter

impl Hash for Quarter

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

where __H: Hasher,

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 Quarter

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Quarter