Struct FontSpec 

pub struct FontSpec {
    pub family: String,
    pub size: f32,
    pub weight: u16,
    pub style: FontStyle,
    pub letter_spacing: f32,
    pub line_height: Option<f32>,
    pub features: Vec<FontFeature>,
}

Font specification for UI text.

The three legacy fields (family, size, weight) plus the FontSpec::new constructor are unchanged. The richer typographic fields (style, letter_spacing, line_height, features) are additive and default to “no override”, so existing call sites are unaffected.

Fields

family: String

Font family name.

size: f32

Font size in points.

weight: u16

Font weight (100 thin … 900 black; 400 is regular).

style: FontStyle

Slant style (normal / italic / oblique).

letter_spacing: f32

Additional inter-character spacing in points (0.0 = font default).

line_height: Option<f32>

Line height (leading) in points. None uses the font’s natural metrics.

features: Vec<FontFeature>

OpenType feature toggles applied to runs using this spec.

Implementations

impl FontSpec

pub fn new(family: impl Into<String>, size: f32, weight: u16) -> Self

Construct a FontSpec with explicit family/size/weight; the typographic extras default to “no override”.

pub fn with_style(self, style: FontStyle) -> Self

Builder: set the slant FontStyle.

pub fn with_letter_spacing(self, letter_spacing: f32) -> Self

Builder: set additional letter spacing in points.

pub fn with_line_height(self, line_height: f32) -> Self

Builder: set the line height (leading) in points.

pub fn with_feature(self, feature: FontFeature) -> Self

Builder: append an OpenType FontFeature.

pub fn is_slanted(&self) -> bool

Returns true if the face is italic or oblique.

Trait Implementations

impl Clone for FontSpec

fn clone(&self) -> FontSpec

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FontSpec

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

Formats the value using the given formatter.

impl Default for FontSpec

fn default() -> Self

Returns Inter / 14 pt / regular (400), upright, no overrides.

impl PartialEq for FontSpec

fn eq(&self, other: &FontSpec) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for FontSpec