Struct Shading 

pub struct Shading {
    pub geometry: Geometry,
    pub space: Arc<ColorSpace>,
    pub functions: Box<[Arc<Function>]>,
    pub background: Option<Rgb>,
    pub bbox: Option<Rect>,
}

A loaded, validated shading.

Fields

geometry: Geometry

The geometry and its parameters.

space: Arc<ColorSpace>

The colour space every function’s output lands in.

functions: Box<[Arc<Function>]>

The tint functions, at most four when they came from an array.

background: Option<Rgb>

/Background, honoured only for a /PatternType 2 shading pattern and never for the sh operator.

bbox: Option<Rect>

/BBox, in the shading’s own space. A malformed array collapses this to a zero rectangle, which makes the shading invisible.

Implementations

impl Shading

pub fn kind(&self) -> ShadingKind

Which kind this is.

pub fn load<R: Resolve>( obj: &Object, resources: Option<&Dict>, source: ShadingSource, r: &R, functions_cache: &mut FunctionCache, limits: &Limits, diags: &mut Diagnostics, ) -> Option<Self>

Load and validate a shading.

Returns None for every condition PDFium treats as “unsupported shading”, which paints nothing.

pub fn color_at(&self, t: f32) -> Rgb

Evaluate the shading’s functions at one parametric position, concatenating multi-function outputs, and convert to a colour.

Trait Implementations

impl Clone for Shading

fn clone(&self) -> Shading

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Shading

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

Formats the value using the given formatter.

impl PartialEq for Shading

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Shading