Enum EngineSpan 

pub enum EngineSpan {
    Prepass = 0,
    Main = 1,
    Composite = 2,
    Blit = 3,
}

One of the four GPU spans an engine frame is split into.

The discriminants are the span indices a TimestampRing is driven with, and the order is the order a frame line reports them in — both are wire contract, so a variant is appended, never re-ordered.

Variants

Prepass = 0

Work recorded strictly ahead of the frame’s own passes: the glyph-atlas replay that draws newly cached glyphs into their array layers.

Main = 1

The frame’s own surface passes — the clear, the opaque depth-writing strip pass, every surface round’s alpha strips, and the hole punch.

Composite = 2

Everything drawn into an off-screen page rather than the surface: each isolated layer’s page round and each pass of a filter’s sequence.

Blit = 3

The host’s own present-side conversion — the un-premultiplying pass a straight-alpha swapchain needs, or a blit into it.

Implementations

impl EngineSpan

pub const ALL: [EngineSpan; 4]

Every span, in reporting order.

pub const COUNT: usize

How many spans a frame is split into — what a caller sizes a TimestampRing with.

pub const fn index(self) -> usize

This span’s index in a frame’s reading.

pub const fn name(self) -> &'static str

This span’s stable name, as a frame line’s field spells it.

Trait Implementations

impl Clone for EngineSpan

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 EngineSpan

impl Debug for EngineSpan

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

Formats the value using the given formatter.

impl Eq for EngineSpan

impl Hash for EngineSpan

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for EngineSpan

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for EngineSpan

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for EngineSpan

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for EngineSpan