Struct LitContent 

pub struct LitContent { /* private fields */ }

The lighting of the own content of a visual in the render walk: begun before the content is drawn, ended after it (before the children).

Implementations

impl LitContent

pub fn begin( visual: &ServerCompositionVisual, canvas: &mut dyn IDrawingContextImpl, ) -> Option<LitContent>

When enabled lights reach visual, pushes the layer the content is drawn into; None (nothing pushed) when no light reaches the visual, it has no content bounds, the light is full everywhere, or the visual is a layer visual (whose layer stays open for its children, which are lit each by itself). Without layer effects, also None when the compositor has no render interface for the bitmap of the map.

pub fn end(self, canvas: &mut dyn IDrawingContextImpl)

Ends the lighting: pops the multiply layer, or draws the light map over the content and pops the layer.