Struct PlaneAssignment 

pub struct PlaneAssignment { /* private fields */ }

Plane-to-layer assignment.

A flat vector rather than a map: CRTCs have at most a handful of planes, so a linear scan beats hashing, and reassigning one reuses the allocation instead of rehashing. Same reasoning the C++ PlaneAssignment records.

Implementations

impl PlaneAssignment

pub const fn new() -> Self

An empty assignment.

pub fn insert(&mut self, plane_id: u32, layer: LayerId)

Assign a plane, replacing any previous layer on it.

pub fn get(&self, plane_id: u32) -> Option<LayerId>

The layer assigned to a plane.

pub fn get_plane_of(&self, layer: LayerId) -> Option<u32>

The plane a layer is assigned to, if any.

pub fn remove(&mut self, plane_id: u32) -> Option<LayerId>

Remove a plane’s assignment.

pub fn entries(&self) -> &[(u32, LayerId)]

Every (plane_id, layer) pair.

pub fn len(&self) -> usize

How many planes are assigned.

pub fn is_empty(&self) -> bool

Whether nothing is assigned.

pub fn clear(&mut self)

Drop every assignment.

Trait Implementations

impl Clone for PlaneAssignment

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 PlaneAssignment

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

Formats the value using the given formatter.

impl Default for PlaneAssignment

fn default() -> Self

Returns the “default value” for a type.

impl Eq for PlaneAssignment

impl PartialEq for PlaneAssignment

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for PlaneAssignment