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png

devpage_design

Function png 

Source 
pub fn png(
    renderer: &mut Renderer,
    scene: &Scene,
    theme: Theme,
) -> Result<Vec<u8>, String>
Expand description

Paints a scene’s whole drawing at 1× in theme and encodes it as a PNG, band by band, or says why it can’t: see Renderer::drawing. A drawing made afresh and kept by nothing: the server’s PNG comes from its kept drawings and tiles instead. This is the reference the engine’s, the module’s and the canvas’s tests compare a drawing against — one call, from a scene, with nothing kept.