Struct GlyphCache 

pub struct GlyphCache { /* private fields */ }

Glyph cache with LRU eviction.

Tracks a frame generation counter. Each get marks the glyph as used in the current generation. evict_unused removes glyphs not used for max_idle_frames generations and deallocates their atlas space.

Implementations

impl GlyphCache

pub fn new() -> Self

pub fn advance_generation(&mut self)

Advance the frame generation counter. Call once per render frame.

pub fn generation(&self) -> u64

pub fn get(&mut self, key: &GlyphCacheKey) -> Option<&CachedGlyph>

Look up a cached glyph, marking it as used in the current generation.

pub fn peek(&self, key: &GlyphCacheKey) -> Option<&CachedGlyph>

Look up without marking as used (for read-only queries).

pub fn insert(&mut self, key: GlyphCacheKey, glyph: CachedGlyph)

pub fn evict_unused(&mut self) -> Vec<AllocId>

Evict glyphs unused for MAX_IDLE_FRAMES generations. Returns the AllocIds that should be deallocated from the atlas.

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

Trait Implementations

impl Default for GlyphCache

fn default() -> Self

Returns the “default value” for a type.