Struct wr_glyph_rasterizer::rasterizer::FontKeyMap

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pub struct FontKeyMap(Arc<RwLock<FontKeyMapLocked>>);
Expand description

A shared map from fonts key local to a namespace to shared font keys that can be shared across many namespaces. Local keys are tracked in a hashmap that stores a strong reference per mapping so that their count can be tracked. A map of font templates is used to hash font templates to their final shared key. The shared key will stay alive so long as there are any strong references to the mapping entry. Care must be taken when clearing namespaces of shared keys as this may trigger shared font keys to expire which require individual processing. Shared font keys will be created within the provided unique namespace.

Tuple Fields§

§0: Arc<RwLock<FontKeyMapLocked>>

Implementations§

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impl FontKeyMap

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pub fn new(namespace: IdNamespace) -> Self

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fn lock(&self) -> RwLockReadGuard<'_, FontKeyMapLocked>

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fn lock_mut(&mut self) -> RwLockWriteGuard<'_, FontKeyMapLocked>

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pub fn keys(&self) -> Vec<FontKey>

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pub fn map_key(&self, font_key: &FontKey) -> FontKey

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pub fn add_key( &mut self, font_key: &FontKey, template: &FontTemplate, ) -> Option<FontKey>

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pub fn delete_key(&mut self, font_key: &FontKey) -> Option<FontKey>

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pub fn clear_namespace(&mut self, namespace: IdNamespace) -> Vec<FontKey>

Trait Implementations§

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impl Clone for FontKeyMap

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fn clone(&self) -> FontKeyMap

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl<T> Any for T
where T: 'static + ?Sized,

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fn borrow_mut(&mut self) -> &mut T

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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where F: FnOnce(&Self) -> bool,

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impl<T> Pointable for T

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const ALIGN: usize = _

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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

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unsafe fn deref<'a>(ptr: usize) -> &'a T

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impl<T, U> TryFrom<U> for T
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type Error = Infallible

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type Error = <U as TryFrom<T>>::Error

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Performs the conversion.