Struct SurfaceStats 

pub struct SurfaceStats {
    pub free: usize,
    pub writing: usize,
    pub published: usize,
    pub presents: u64,
    pub would_block: u64,
    pub waiting: usize,
    pub composited: u64,
    pub unshown: u64,
    pub composite_latency_ms: f32,
}

Counters for diagnostics and pressure tests.

Fields

free: usize

Slots available to acquire.

writing: usize

Slots acquired and not yet presented or dropped.

published: usize

Slots presented and still referenced (latest frame, retained scenes or in-flight composition).

presents: u64

Total successful presents.

would_block: u64

Total acquire calls that returned WouldBlock.

waiting: usize

Presented frames not shown yet because their sync point has not been observed reached (see EngineSurface::present).

composited: u64

Presented frames the compositor has composited at least once.

unshown: u64

Presented frames dropped without ever being composited: the engine produced them faster than the compositor showed them.

composite_latency_ms: f32

Delay from present to the first composition of the latest composited frame. Rising values mean the compositor is falling behind (for example, the GPU is saturated); engines can throttle.

Trait Implementations

impl Clone for SurfaceStats

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 SurfaceStats

impl Debug for SurfaceStats

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

Formats the value using the given formatter.

impl Default for SurfaceStats

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for SurfaceStats

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SurfaceStats