Struct MathFont 

pub struct MathFont { /* private fields */ }

Loaded math face.

Examples

use latex_rust::MathFont;

let font = MathFont::stix_two_math().unwrap();
assert_eq!(font.units_per_em(), 1000);

Implementations

impl MathFont

pub fn stix_two_math() -> Result<Self, Error>

Load the embedded STIX Two Math Regular face.

Errors

crate::FontError::InvalidFace if the embedded bytes are not a usable OpenType face.

Examples

use latex_rust::MathFont;
assert!(MathFont::stix_two_math().is_ok());

pub fn from_bytes(raw: &'static [u8]) -> Result<Self, Error>

Parse OpenType bytes. Lifetime is 'static for the embedded font only; this constructor requires a static buffer so the face can be rebuilt.

pub fn bytes(&self) -> &'static [u8]

OpenType bytes this face was parsed from.

pub fn units_per_em(&self) -> u16

unitsPerEm from the head table.

pub fn ascender_fu(&self) -> i16

hhea ascender in font units.

pub fn descender_fu(&self) -> i16

hhea descender in font units (typically negative).

pub fn ascender(&self) -> Dim

Ascender in em.

pub fn descender(&self) -> Dim

Depth below baseline from hhea descender, in em (non-negative).

pub fn glyph(&self, ch: char) -> Result<GlyphMetrics, Error>

Metrics for ch, or FontError::MissingGlyph.

pub fn glyph_id(&self, ch: char, gid: u16) -> Result<GlyphMetrics, Error>

Metrics for OpenType glyph id gid, tagged with ch for the box payload.

pub fn italic_correction(&self, glyph_id: u16) -> Dim

MATH italic correction for glyph_id, or zero.

pub fn top_accent_attachment(&self, glyph_id: u16) -> Option<Dim>

MATH top-accent attachment (em from glyph left), if present.

pub fn horizontal_assembly_parts( &self, glyph_id: u16, ) -> Vec<(u16, u16, u16, u16, bool)>

Horizontal glyph-assembly parts: (gid, start_connector, end_connector, advance, extender). Lengths are font units.

pub fn horizontal_variants(&self, glyph_id: u16) -> Vec<u16>

Horizontal MATH variants of glyph_id, including the base glyph first.

pub fn vertical_variants(&self, glyph_id: u16) -> Vec<u16>

Vertical MATH variants of glyph_id, including the base glyph first.

pub fn sha256_hex(bytes: &[u8]) -> String

SHA-256 hex of the raw face bytes.