Struct InterpLut 

pub struct InterpLut<const N: usize> { /* private fields */ }

Piecewise-linear Q0_16 → Q0_16 table with N knots.

Implementations

impl<const N: usize> InterpLut<N>

pub const fn from_knots(knots: [Q0_16; N], max_err_lsb: u16) -> Self

Construct from a flash-resident knot table.

max_err_lsb is the bake-supplied bound (may be 0 until tables are generated). N must be 17, 33, 65, or 257.

pub const fn max_err_lsb(&self) -> u16

Bake-supplied maximum absolute error in UQ0.16 LSBs.

pub const fn lookup(&self, x: Q0_16) -> Q0_16

Interpolate x between knots. Endpoints return the tabulated values.

N is 17..=257 (enforced by Self::from_knots), so segs and pos stay far inside u32 — no 64-bit multiply, and the arith reciprocal helper means no divide at all.

There is no x == 65535 early return. Clamping the segment index to N - 2 makes the top knot fall out of the general path: at x == 65535 the clamped remainder is exactly 65535, so the blend returns knots[N - 1] unchanged. One clamp replaces a branch, a second table read, and a separate remainder division.

pub const fn encode<S: ColorSpace>( &self, color: Color<S, Linear>, ) -> Color<S, Encoded>

Per-channel encode: Linear<S> → Encoded<S>.

pub const fn decode<S: ColorSpace>( &self, color: Color<S, Encoded>, ) -> Color<S, Linear>

Per-channel decode: Encoded<S> → Linear<S>.

pub fn lookup_f32(&self, x: f32) -> f32

Piecewise-linear lookup with unit f32 x, clamped to 0.0..=1.0. Knots are UQ0.16 values converted to unit f32.

Additive: does not change Self::lookup.

pub fn encode_f32<S: ColorSpace>( &self, color: ColorF32<S, Linear>, ) -> ColorF32<S, Encoded>

Per-channel f32 encode: Linear<S> → Encoded<S>.

pub fn decode_f32<S: ColorSpace>( &self, color: ColorF32<S, Encoded>, ) -> ColorF32<S, Linear>

Per-channel f32 decode: Encoded<S> → Linear<S>.

Trait Implementations

impl<const N: usize> Clone for InterpLut<N>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<const N: usize> Copy for InterpLut<N>