Struct FontEnvironment 

pub struct FontEnvironment { /* private fields */ }

A frozen content environment with an explicit cache identity. The content package owns its concrete font implementation; core only carries its immutable snapshot and never initializes a font engine.

Implementations

impl FontEnvironment

pub fn new<T: Any + Send + Sync>(value: T, identity: u64) -> Self

Captures an immutable environment under its owning implementation’s identity.

pub fn snapshot_id(&self) -> u64

Stable identity of this immutable environment snapshot.

pub fn with_usage( self, usage: impl Fn() -> Vec<FontIdentity> + Send + Sync + 'static, ) -> Self

Attaches explicit usage reporting without exposing the content engine to core.

pub fn used_fonts(&self) -> Vec<FontIdentity>

Faces actually selected from this shared environment, including source hashes.

pub fn downcast_ref<T: Any>(&self) -> Option<&T>

Resolves an environment only in the package that owns its concrete type.

Trait Implementations

impl Clone for FontEnvironment

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FontEnvironment

fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<&FontEnvironment> for FontEnvironment

fn from(value: &FontEnvironment) -> Self

Converts to this type from the input type.

impl RefUnwindSafe for FontEnvironment

impl UnwindSafe for FontEnvironment