Struct TextSubsystem 

pub struct TextSubsystem {
    pub engine: TextEngine,
    pub glyph_cache: LruCache<u64, (Rect, f32, f32, f32, f32)>,
    pub shaped_cache: LruCache<(String, u32), Arc<ShapedText>>,
    pub atlas_size: u32,
}

Group of caches and engines used for text rendering.

Fields

engine: TextEngine

The Runic text shaping engine. Default-constructible; the engine itself is stateless across threads.

glyph_cache: LruCache<u64, (Rect, f32, f32, f32, f32)>

LRU cache mapping glyph hash -> (uv_rect, w, h, x_off, y_off). Capacity is configurable via RendererConfig.

shaped_cache: LruCache<(String, u32), Arc<ShapedText>>

Shaped text cache keyed by (text, font_size). Bounded so it survives across frames without growing without limit. Stores Arc so clones are cheap (atomic refcount bump).

atlas_size: u32

Size of each glyph atlas in pixels (width and height).

Implementations

impl TextSubsystem

pub fn forge(glyph_cache_capacity: NonZeroUsize) -> Self

Create a text subsystem with the given LRU capacity for the glyph cache and default 4096x4096 atlas size.

pub fn with_atlas_size( glyph_cache_capacity: NonZeroUsize, atlas_size: u32, ) -> Self

Create a text subsystem with a custom atlas size (in pixels).

pub fn atlas_size(&self) -> u32

Return the configured atlas size in pixels.

pub fn clear_caches(&mut self)

Clear both caches. Called on theme change.