Struct piston_window::glyph_cache::rusttype::GlyphCache

pub struct GlyphCache<'a, F, T> {
    pub font: Font<'a>,
    pub factory: F,
    /* private fields */
}

A struct used for caching rendered font.

Fields

font: Font<'a>

The font.

factory: F

The factory used to create textures.

Implementations

impl<'a, F, T> GlyphCache<'a, F, T>where T: CreateTexture<F> + UpdateTexture<F> + ImageSize,

pub fn from_font( font: Font<'a>, factory: F, settings: TextureSettings ) -> GlyphCache<'a, F, T>

Constructs a GlyphCache from a Font.

pub fn new<P>( font: P, factory: F, settings: TextureSettings ) -> Result<GlyphCache<'static, F, T>, Error>where P: AsRef<Path>,

Constructor for a GlyphCache.

pub fn from_bytes( font: &'a [u8], factory: F, settings: TextureSettings ) -> Result<GlyphCache<'a, F, T>, ()>

Creates a GlyphCache for a font stored in memory.

pub fn preload_chars<I>( &mut self, size: u32, chars: I ) -> Result<(), <T as TextureOp<F>>::Error>where I: Iterator<Item = char>,

Load all characters in the chars iterator for size

pub fn preload_printable_ascii( &mut self, size: u32 ) -> Result<(), <T as TextureOp<F>>::Error>

Load all the printable ASCII characters for size. Includes space.

pub fn opt_character(&self, size: u32, ch: char) -> Option<Character<'_, T>>

Return ch for size if it’s already cached. Don’t load. See the preload_* functions.

Trait Implementations

impl<'b, F, T> CharacterCache for GlyphCache<'b, F, T>where T: ImageSize + CreateTexture<F> + UpdateTexture<F>,

type Texture = T

The texture type associated with the character cache.

type Error = <T as TextureOp<F>>::Error

The error type associated with the character cache.

fn character( &mut self, size: u32, ch: char ) -> Result<Character<'_, T>, <GlyphCache<'b, F, T> as CharacterCache>::Error>

Get reference to character.

fn width(&mut self, size: u32, text: &str) -> Result<f64, Self::Error>

Return the width for some given text.