Struct Shown 

pub struct Shown {
    pub revision: Option<u64>,
    /* private fields */
}

What a set of layer textures shows: the layers of the frame last composited from them, or warmed into them at rest (a presenter warming its textures between pans). A layer is None while its texture holds nothing known: a warm stopped while drawing it.

Fields

revision: Option<u64>

The frame whose composite the output target was last given; None when the output was not composited from what the textures hold.

Implementations

impl Shown

pub fn of(cache: &FrameCache, revision: u64) -> Shown

Textures holding every layer of cache, composited into the output as revision.

pub fn unknown() -> Shown

Textures holding nothing known.

pub fn chrome_generation(&self) -> Option<u64>

Which drawing’s chrome the chrome texture holds (FrameCache::generation), when it holds a known one.

pub fn forget(&mut self, layer: Layer)

layer’s texture is about to be drawn: until it is done it holds nothing known.

pub fn record(&mut self, layer: Layer, cache: &FrameCache)

layer’s texture now holds cache’s.