Enum BaselineShift 

pub enum BaselineShift {
    None,
    Super,
    Sub,
}

Per-run baseline shift, for superscript / subscript runs.

Super/Sub cause the run’s glyphs to be shaped at a reduced size (BaselineShift::SCALE) and drawn with a vertical offset (BaselineShift::offset) — up for super, down for sub — relative to the surrounding text’s baseline. None leaves the run on the normal baseline.

Variants

None

Super

Sub

Implementations

impl BaselineShift

pub const SCALE: f32 = 0.7

Font-size multiplier applied to super/subscript runs (~0.7×).

pub fn is_shifted(self) -> bool

pub fn offset(self, font_size: f32) -> f32

Vertical draw-time offset (in px) for a run shaped at font_size.

Returns the signed delta to add to the glyph baseline: negative (upward) for Super, positive (downward) for Sub, 0.0 for None. Tuned to ~0.33× / ~0.18× of the surrounding size so the shifted run reads clearly above/below the baseline without leaving the line box.

Trait Implementations

impl Clone for BaselineShift

fn clone(&self) -> BaselineShift

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BaselineShift

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

Formats the value using the given formatter.

impl Default for BaselineShift

fn default() -> BaselineShift

Returns the “default value” for a type.

impl Hash for BaselineShift

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for BaselineShift

fn eq(&self, other: &BaselineShift) -> 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 Copy for BaselineShift

impl Eq for BaselineShift

impl StructuralPartialEq for BaselineShift