Struct AlphaMatteNode 

pub struct AlphaMatteNode {
    pub background_rgba: Vec<u8>,
    pub background_width: u32,
    pub background_height: u32,
    /* private fields */
}

Porter-Duff src-over: composite inputs[0] (foreground) over inputs[1] (background) using the foreground’s own alpha channel.

For the CPU path the background data must be stored in background_rgba.

Fields

background_rgba: Vec<u8>

Background frame RGBA bytes (required for the CPU path).

background_width: u32

Width of background_rgba.

background_height: u32

Height of background_rgba.

Implementations

impl AlphaMatteNode

pub fn new( background_rgba: Vec<u8>, background_width: u32, background_height: u32, ) -> Self

Trait Implementations

impl RenderNode for AlphaMatteNode

Available on crate feature wgpu only.

fn input_count(&self) -> usize

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

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

Run the GPU render pass.

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 AlphaMatteNode

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

Process rgba in-place.