Struct EdgeOverflowReadbackState 

pub struct EdgeOverflowReadbackState {
    pub inflight: bool,
    pub pending_overflow_count: Option<(u32, u32)>,
}

Per-frame state for the MSAA edge-budget overflow readback loop.

The render frame copies 8 bytes (edge_count, edge_overflow_count) from crate::render_passes::material_opaque::edge_buffers::MaterialEdgeBuffers::data_buffer into a CPU-mappable buffer, then kicks mapAsync. When the read resolves, the next frame’s preamble inspects pending_overflow_count: if > 0, the renderer calls crate::AwsmRenderer::set_max_edge_budget(current * 2) so subsequent frames have headroom. Single-buffered (inflight gates the next kick) — under high mapping latency we lose one frame’s signal rather than ringing a buffer.

Fields

inflight: bool

true while a mapAsync is in flight against MaterialEdgeBuffers::overflow_readback_buffer. Subsequent frames skip the copy + kick until the prior resolves.

pending_overflow_count: Option<(u32, u32)>

Pending (edge_count, edge_overflow_count) snapshot from the most recently resolved mapAsync. Ingested at the top of the next render (set to None after reading).

Trait Implementations

impl Default for EdgeOverflowReadbackState

fn default() -> EdgeOverflowReadbackState

Returns the “default value” for a type.