Enum Transform

#[non_exhaustive]
#[repr(u32)]
pub enum Transform {
    Normal = 0,
    _90 = 1,
    _180 = 2,
    _270 = 3,
    Flipped = 4,
    Flipped90 = 5,
    Flipped180 = 6,
    Flipped270 = 7,
}

transformation applied to buffer contents

This describes transformations that clients and compositors apply to buffer contents.

The flipped values correspond to an initial flip around a vertical axis followed by rotation.

The purpose is mainly to allow clients to render accordingly and tell the compositor, so that for fullscreen surfaces, the compositor will still be able to scan out directly from client surfaces.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Normal = 0

no transform

_90 = 1

90 degrees counter-clockwise

_180 = 2

180 degrees counter-clockwise

_270 = 3

270 degrees counter-clockwise

Flipped = 4

180 degree flip around a vertical axis

Flipped90 = 5

flip and rotate 90 degrees counter-clockwise

Flipped180 = 6

flip and rotate 180 degrees counter-clockwise

Flipped270 = 7

flip and rotate 270 degrees counter-clockwise

Trait Implementations

impl Clone for Transform

fn clone(&self) -> Transform

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Transform

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

Formats the value using the given formatter.

impl From<Transform> for u32

fn from(val: Transform) -> u32

Converts to this type from the input type.

impl Hash for Transform

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 Transform

fn cmp(&self, other: &Transform) -> 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 Transform

fn eq(&self, other: &Transform) -> 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 Transform

fn partial_cmp(&self, other: &Transform) -> 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 TryFrom<u32> for Transform

type Error = ()

The type returned in the event of a conversion error.

fn try_from(val: u32) -> Result<Transform, ()>

Performs the conversion.

impl Copy for Transform

impl Eq for Transform

impl StructuralPartialEq for Transform