Struct ori::core::text::Fonts

pub struct Fonts {
    pub swash_cache: SwashCache,
    pub font_system: FontSystem,
    pub glyph_cache: HashMap<CacheKey, CachedGlyph>,
}

A context for loading and rasterizing fonts.

This is a wrapper around the [cosmic_text] crate, and provides a simple interface for loading and rasterizing fonts. Interacting with this directly is not necessary for most applications, see Text and TextInput.

Fields

swash_cache: SwashCache

The swash cache.

font_system: FontSystem

The font system.

glyph_cache: HashMap<CacheKey, CachedGlyph>

The glyph cache.

Implementations

impl Fonts

pub fn new() -> Fonts

Creates a new font context.

pub fn load_font(&mut self, source: impl Into<FontSource>) -> Result<(), Error>

Loads a font from a FontSource.

This will usually either be a path to a font file or the font data itself, but can also be a Vec<FontSource> to load multiple fonts at once.

pub fn load_system_fonts(&mut self)

Loads the system fonts.

This is a platform-specific operation, for more information see the documentation for fontdb::Database::load_system_fonts.

pub fn buffer_size(buffer: &Buffer) -> Size

Calculates the size of a text buffer.

The resulting size is the smallest rectangle that can contain the text, and is roughly equal to the widest line and the line height multiplied the number of laid out lines.

pub fn rasterize_glyph( &mut self, glyph: &LayoutGlyph, scale: f32 ) -> &CachedGlyph

Rasterize a glyph.

pub fn draw_buffer( &mut self, canvas: &mut Canvas, buffer: &Buffer, offset: Vector, scale: f32 )

Rasterize a buffer.

Trait Implementations

impl Debug for Fonts

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for Fonts

fn default() -> Fonts

Returns the “default value” for a type.