Struct ChromaKeyNode 

pub struct ChromaKeyNode {
    pub key_color: [f32; 3],
    pub tolerance: f32,
    pub softness: f32,
    /* private fields */
}

Remove a solid colour from a texture by chroma distance, producing alpha.

The algorithm computes the Euclidean distance between the pixel’s chroma vector (RGB − luma) and the key colour’s chroma vector, then applies a soft threshold to set the alpha channel. Pixels that match key_color within tolerance become fully transparent; pixels further than tolerance + softness stay fully opaque.

Fields

key_color: [f32; 3]

Key colour in linear RGB [0.0, 1.0].

tolerance: f32

Chroma distance threshold (0.0–1.0).

softness: f32

Edge feather width (0.0–1.0).

Implementations

impl ChromaKeyNode

pub fn new(key_color: [f32; 3], tolerance: f32, softness: f32) -> Self

Trait Implementations

impl RenderNode for ChromaKeyNode

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.

impl RenderNodeCpu for ChromaKeyNode

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

Process rgba in-place.