Struct ColorWheelsNode 

pub struct ColorWheelsNode {
    pub shadows_lift: [f32; 3],
    pub midtones_gamma: [f32; 3],
    pub highlights_gain: [f32; 3],
    /* private fields */
}

Three-way colour corrector: shadows / midtones / highlights lift, gamma, gain.

Each adjustment is weighted by a luminance region so it acts on its tonal range: shadows_lift (additive) on dark pixels, midtones_gamma on mid pixels, highlights_gain (multiplicative) on bright pixels.

Fields

shadows_lift: [f32; 3]

Shadows lift: additive offset per RGB channel (typ. [-1, 1]).

midtones_gamma: [f32; 3]

Midtones gamma: exponent per RGB channel (typ. [0.1, 10.0]; 1.0 = no-op).

highlights_gain: [f32; 3]

Highlights gain: multiplier per RGB channel (typ. [0.0, 4.0]; 1.0 = no-op).

Implementations

impl ColorWheelsNode

pub fn new( shadows_lift: [f32; 3], midtones_gamma: [f32; 3], highlights_gain: [f32; 3], ) -> Self

Creates a three-way colour corrector.

Trait Implementations

impl Default for ColorWheelsNode

fn default() -> Self

Identity node (no lift, unit gamma, unit gain).

impl RenderNode for ColorWheelsNode

Available on crate feature wgpu only.

fn process( &self, inputs: &[&Texture], outputs: &[&Texture], ctx: &RenderContext, )

Run the GPU render pass.

fn input_count(&self) -> usize

Number of input textures required by this node (default: 1).

fn pass_count(&self) -> usize

Number of render passes (default: 1). Multi-pass nodes (e.g. gaussian blur) return 2 or more.

fn output_dimensions(&self, in_w: u32, in_h: u32) -> (u32, u32)

Output dimensions this node produces given its input dimensions.

fn set_param(&self, _param: NodeParam) -> bool

Applies param to this node in place, returning whether it was taken.

impl RenderNodeCpu for ColorWheelsNode

fn process_cpu(&self, rgba: &mut [u8], _w: u32, _h: u32)

Process rgba in-place.