Enum MetricInvalidation 

pub enum MetricInvalidation {
    FontLoaded,
    DprChanged,
    ZoomChanged,
    ContainerResized,
    FontSizeChanged,
    FullReset,
}

Reason for a font metric recomputation.

Each variant triggers a specific set of cache invalidations.

Variants

FontLoaded

Web font finished loading, metrics may have changed.

DprChanged

Device pixel ratio changed (e.g., window moved between monitors).

ZoomChanged

User zoom level changed.

ContainerResized

Container was resized (may affect fit, not metrics themselves).

FontSizeChanged

Font size explicitly changed by user or configuration.

FullReset

Full metric reset requested (e.g., after error recovery).

Implementations

impl MetricInvalidation

pub fn requires_rasterization(&self) -> bool

Whether this invalidation requires recomputing glyph rasterization.

DPR and font size changes affect pixel output; container resize does not.

pub fn requires_refit(&self) -> bool

Whether this invalidation requires recomputing grid dimensions.

Trait Implementations

impl Clone for MetricInvalidation

fn clone(&self) -> MetricInvalidation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetricInvalidation

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

Formats the value using the given formatter.

impl Display for MetricInvalidation

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

Formats the value using the given formatter.

impl Hash for MetricInvalidation

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for MetricInvalidation

fn eq(&self, other: &MetricInvalidation) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for MetricInvalidation

impl Eq for MetricInvalidation

impl StructuralPartialEq for MetricInvalidation