Struct TextRasterizer

pub struct TextRasterizer {
    cache: HashMap<(u64, u32), Arc<Frame>>,
    families: Vec<String>,
    loaded: bool,
    db: Database,
    fonts: HashMap<ID, Option<FontArc>>,
    user_fonts: Vec<String>,
}

Fields

cache: HashMap<(u64, u32), Arc<Frame>>

families: Vec<String>

loaded: bool

db: Database

fonts: HashMap<ID, Option<FontArc>>

user_fonts: Vec<String>

User font file paths already loaded (or attempted), so repeat calls are cheap.

Implementations

impl TextRasterizer

pub fn new() -> Self

Cheap; fonts load lazily (or via load_system_fonts from a background thread).

pub fn load_system_fonts(&mut self)

Scan system fonts (≈100 ms). Idempotent.

pub fn load_user_fonts(&mut self, paths: &[String])

Load user font files (Settings.user_fonts) into the database. Idempotent: paths already loaded (or that failed) are skipped on repeat calls.

fn refresh_families(&mut self)

pub fn is_loaded(&self) -> bool

pub fn families(&self) -> &[String]

Sorted unique family names (empty until loaded).

pub fn render(&mut self, style: &TextStyle, scale: f32) -> Arc<Frame>

Render style at scale. Never fails: unknown fonts fall back to any sans font; empty text yields a 1×1 transparent frame.

fn font_for(&mut self, style: &TextStyle) -> Option<FontArc>

fn rasterize(&mut self, style: &TextStyle, scale: f32) -> Option<Frame>

Trait Implementations

impl Default for TextRasterizer

fn default() -> Self

Returns the “default value” for a type.