Struct TextShapeCache 

pub struct TextShapeCache {
    pub hits: u64,
    pub misses: u64,
    /* private fields */
}

Cache for shaped text results.

Uses version-based keys to invalidate cached data when text content, font properties, or layout constraints change.

Fields

hits: u64

Statistics for monitoring cache performance

misses: u64

Implementations

impl TextShapeCache

pub fn new() -> Self

Create a new empty text shape cache.

pub fn get_or_shape<F>( &mut self, key: ShapeKey, shape_fn: F, ) -> Arc<ShapedTextData>

where F: FnOnce() -> ShapedTextData,

Get cached shaped text or compute it.

Returns an Arc to the shaped data, allowing cheap cloning and sharing. The cache is invalidated automatically when the key changes (version bump).

pub fn get(&mut self, key: &ShapeKey) -> Option<Arc<ShapedTextData>>

Get cached data without computing if missing.

pub fn insert( &mut self, key: ShapeKey, data: ShapedTextData, ) -> Arc<ShapedTextData>

Insert shaped data into the cache.

pub fn clear(&mut self)

Clear the cache (useful when fonts are reloaded).

pub fn prune_old_versions(&mut self, min_version: u32)

Remove entries older than a certain version (garbage collection).

pub fn hit_rate(&self) -> f32

Get cache statistics.

pub fn len(&self) -> usize

Get the number of cached entries.

pub fn is_empty(&self) -> bool

Check if the cache is empty.

pub fn stats_string(&self) -> String

Get cache statistics as a formatted string.

pub fn avg_renders_per_entry(&self) -> f32

Get average renders per cached entry (effectiveness metric).

Trait Implementations

impl Default for TextShapeCache

fn default() -> Self

Returns the “default value” for a type.