Enum FilterSpec 

pub enum FilterSpec {
    Grayscale(f64),
    Invert(f64),
    Sepia(f64),
    Saturate(f64),
    Brightness(f64),
    Contrast(f64),
    HueRotate(f64),
    Duotone {
        amount: f64,
        shadow: Color,
        highlight: Color,
    },
    Noise {
        amount: f64,
        seed: i64,
        scale: f64,
    },
}

A single color-filter operation applied to captured ink (straight-alpha math).

Each variant carries its already-resolved scalar payload (the per-kind amount, defaults substituted at compile time). Duotone additionally carries its two resolved colors — the scene IR stays decoupled from the core AST, exactly as ShadowSpec carries a scene-local Color rather than a color-token id. The compile step maps core → scene.

Variants

Grayscale(f64)

Invert(f64)

Sepia(f64)

Saturate(f64)

Brightness(f64)

Contrast(f64)

HueRotate(f64)

Duotone

Maps luma to a blend between shadow (dark) and highlight (light), then mixes with the original by amount.

Fields

amount: f64

shadow: Color

highlight: Color

Noise

Deterministic monochrome additive film grain: adds the same per-pixel delta to R, G, and B, derived from an integer hash of the page-absolute pixel cell and seed. amount scales the grain magnitude; scale is the grain cell size in pixels. Same inputs → same grain on any machine.

Fields

amount: f64

seed: i64

scale: f64

Trait Implementations

impl Clone for FilterSpec

fn clone(&self) -> FilterSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FilterSpec

impl Debug for FilterSpec

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

Formats the value using the given formatter.

impl PartialEq for FilterSpec

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for FilterSpec

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for FilterSpec