Enum Function 

pub enum Function {
    Sampled {
        domain: Vec<f64>,
        range: Vec<f64>,
        size: Vec<usize>,
        bps: u32,
        encode: Vec<f64>,
        decode: Vec<f64>,
        samples: Vec<u8>,
        n_out: usize,
    },
    Exponential {
        domain: Vec<f64>,
        c0: Vec<f64>,
        c1: Vec<f64>,
        n: f64,
    },
    Stitching {
        domain: Vec<f64>,
        functions: Vec<Function>,
        bounds: Vec<f64>,
        encode: Vec<f64>,
    },
    PostScript {
        domain: Vec<f64>,
        range: Vec<f64>,
        program: Vec<PsOp>,
    },
    Array(Vec<Function>),
    Identity,
}

Variants

Sampled

Fields

domain: Vec<f64>

range: Vec<f64>

size: Vec<usize>

bps: u32

encode: Vec<f64>

decode: Vec<f64>

samples: Vec<u8>

n_out: usize

Exponential

Fields

domain: Vec<f64>

c0: Vec<f64>

c1: Vec<f64>

n: f64

Stitching

Fields

domain: Vec<f64>

functions: Vec<Function>

bounds: Vec<f64>

encode: Vec<f64>

PostScript

Fields

domain: Vec<f64>

range: Vec<f64>

program: Vec<PsOp>

Array(Vec<Function>)

Several 1-out functions side by side (a shading’s /Function array).

Identity

The identity, for a /Function that could not be read: outputs are the inputs, which keeps a broken shading visible rather than absent.

Implementations

impl Function

pub fn parse(doc: &Document, obj: &Object) -> Option<Function>

Parse a /Function entry: a dictionary, a stream, or an array of them.

pub fn eval(&self, inputs: &[f64]) -> Vec<f64>

Evaluate at inputs, clamped to the domain; the output count follows the function (Range, C0, the array length …).

Trait Implementations

impl Clone for Function

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Function

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

Formats the value using the given formatter.