Trait SceneSource

Source

pub trait SceneSource {
    // Required methods
    fn format(&self) -> SourceFormat;
    fn pull(&mut self) -> Result<Option<RenderedFrame>>;
}

Expand description

Pull-based source of rendered frames.

Implementors typically wrap a Scene + SceneRenderer and advance an internal frame counter per pull(). The first call after prepare emits frame 0 at timestamp 0; each subsequent call advances by 1 / framerate.

Sources are not required to be seekable — a streaming compositor source is forward-only. Sources that can seek should expose it via an inherent method, not this trait.

Required Methods§

Source

fn format(&self) -> SourceFormat

Declared format. Constant across a session.

Source

fn pull(&mut self) -> Result<Option<RenderedFrame>>

Produce the next rendered tick. Returns Ok(None) when the source is exhausted (finite scene reached its end). For indefinite sources, this never returns None.