Struct pdf_writer::writers::ExponentialFunction

pub struct ExponentialFunction<'a> { /* private fields */ }

Writer for an exponential function dictionary. PDF 1.3+.

The function result is y_i = C0_i + x^N * (C1_i - C0_i) where i is the current dimension.

This struct is created by Chunk::exponential_function and writers::Separation::tint_exponential.

Implementations

impl<'a> ExponentialFunction<'a>

pub fn domain(&mut self, domain: impl IntoIterator<Item = f32>) -> &mut Self

Write the /Domain attribute to set where the function is defined. Required.

pub fn range(&mut self, range: impl IntoIterator<Item = f32>) -> &mut Self

Write the /Range attribute.

Required for sampled and PostScript functions.

pub fn c0(&mut self, c0: impl IntoIterator<Item = f32>) -> &mut Self

Write the /C0 array.

Function result when input is zero. Default is 0.0.

pub fn c1(&mut self, c1: impl IntoIterator<Item = f32>) -> &mut Self

Write the /C1 array.

Function result when input is one. Default is 1.0.

pub fn n(&mut self, n: f32) -> &mut Self

Write the /N attribute.

The interpolation exponent. Required.

Methods from Deref<Target = Dict<'a>>

pub fn len(&self) -> i32

The number of written pairs.

pub fn is_empty(&self) -> bool

Whether no pairs have been written so far.

pub fn insert(&mut self, key: Name<'_>) -> Obj<'_>

Start writing a pair with an arbitrary value.

pub fn pair<T: Primitive>(&mut self, key: Name<'_>, value: T) -> &mut Self

Write a pair with a primitive value.

This is a shorthand for dict.insert(key).primitive(value).

pub fn pairs<'n, T: Primitive>( &mut self, pairs: impl IntoIterator<Item = (Name<'n>, T)> ) -> &mut Self

Write a sequence of pairs with primitive values.

Trait Implementations

impl<'a> Deref for ExponentialFunction<'a>

type Target = Dict<'a>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'a> DerefMut for ExponentialFunction<'a>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl<'a, 'any> Rewrite<'a> for ExponentialFunction<'any>

type Output = ExponentialFunction<'a>

The writer with the rewritten lifetime.

impl<'a> Writer<'a> for ExponentialFunction<'a>

fn start(obj: Obj<'a>) -> Self

Start writing the object.