Struct LayerPlacement 

#[non_exhaustive]
pub struct LayerPlacement {
    pub layer: LayerId,
    pub placement: Placement,
    pub plane_id: Option<u32>,
    pub plane_rotation_bits: u64,
}

One layer’s outcome.

The default is the safe one: unassigned, on no plane. A placement nothing filled in describes a layer that did not reach the screen, which is a smaller claim than naming a plane it does not have.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

layer: LayerId

Which layer.

placement: Placement

How it reached scanout.

plane_id: Option<u32>

The plane its content scanned out on, or None when unassigned.

For a composited layer this is the canvas plane, not a plane of its own.

plane_rotation_bits: u64

The assigned plane’s supported rotate/reflect mask, for an AssignedToPlane layer; 0 otherwise.

Lets a producer decide whether its requested angle can land on the plane it was given or needs pre-rotation.

Trait Implementations

impl Clone for LayerPlacement

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 LayerPlacement

impl Debug for LayerPlacement

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

Formats the value using the given formatter.

impl Default for LayerPlacement

fn default() -> Self

Unassigned, on no plane, for no layer.

Written by hand rather than derived so LayerId does not have to gain a Default it has no use for elsewhere – an id is something the scene hands out, and one a caller could conjure would be a way to address a layer that does not exist.

impl Eq for LayerPlacement

impl PartialEq for LayerPlacement

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for LayerPlacement