Struct ServerCompositionVisualCache 

pub struct ServerCompositionVisualCache { /* private fields */ }

The bitmap cache of a visual: an offscreen layer the subtree of the visual is rendered into, redrawn only where it changed.

The cache is its own dirty rect collector (DirtyRectCollector upstream).

Implementations

impl ServerCompositionVisualCache

pub fn new( visual: Weak<ServerCompositionVisual>, cache_mode: Rc<ServerCompositionBitmapCache>, ) -> Rc<ServerCompositionVisualCache>

pub fn is_dirty(&self) -> bool

pub fn target_visual(&self) -> Option<Rc<ServerCompositionVisual>>

pub fn free_resources(&self)

pub fn invalidate_properties(&self)

pub fn draw( self: &Rc<Self>, outer_canvas: &mut dyn IDrawingContextImpl, ) -> (i32, i32)

Draws the cached subtree onto outer_canvas, re-rendering the dirty part of the cache first. Returns the numbers of visited and rendered visuals.

Trait Implementations

impl IDirtyRectCollector for ServerCompositionVisualCache

fn add_rect(&self, rect: LtrbRect)