Struct Overlay 

pub struct Overlay { /* private fields */ }

The overlay’s instanced-quad pipeline plus reusable CPU scratch (rebuilt each frame with no steady-state allocation).

Implementations

impl Overlay

pub fn new(device: &Device, surface_format: TextureFormat) -> Self

Build the overlay pipeline and buffers on device.

pub fn render( &mut self, queue: &Queue, encoder: &mut CommandEncoder, view: &TextureView, size: (u32, u32), metrics: Metrics, analysis: AnalysisMetrics, tier: Tier, demoted: bool, frame_ms_samples: impl Iterator<Item = f32>, )

Composite the overlay over view. frame_ms_samples is the rolling frame-time history (oldest first, milliseconds) for the sparkline, and tier is the active quality tier, named in the readout (ADR-0045) — the same preset looks different on different machines now, so which tier a run resolved is diagnostics, not trivia. demoted marks a tier the frame-time governor took back rather than one that was asked for.