Type Alias Head

pub type Head<'a> = TableRef<'a, HeadMarker>;

The head (font header) table.

Aliased Type

struct Head<'a> { /* private fields */ }

Implementations

impl<'a> Head<'a>

pub fn version(&self) -> MajorMinor

Version number of the font header table, set to (1, 0)

pub fn font_revision(&self) -> Fixed

Set by font manufacturer.

pub fn checksum_adjustment(&self) -> u32

To compute: set it to 0, sum the entire font as uint32, then store 0xB1B0AFBA - sum. If the font is used as a component in a font collection file, the value of this field will be invalidated by changes to the file structure and font table directory, and must be ignored.

pub fn magic_number(&self) -> u32

Set to 0x5F0F3CF5.

pub fn flags(&self) -> u16

See the flags enum

pub fn units_per_em(&self) -> u16

Set to a value from 16 to 16384. Any value in this range is valid. In fonts that have TrueType outlines, a power of 2 is recommended as this allows performance optimizations in some rasterizers.

pub fn created(&self) -> LongDateTime

Number of seconds since 12:00 midnight that started January 1st 1904 in GMT/UTC time zone.

pub fn modified(&self) -> LongDateTime

Number of seconds since 12:00 midnight that started January 1st 1904 in GMT/UTC time zone.

pub fn x_min(&self) -> i16

Minimum x coordinate across all glyph bounding boxes.

pub fn y_min(&self) -> i16

Minimum y coordinate across all glyph bounding boxes.

pub fn x_max(&self) -> i16

Maximum x coordinate across all glyph bounding boxes.

pub fn y_max(&self) -> i16

Maximum y coordinate across all glyph bounding boxes.

pub fn mac_style(&self) -> MacStyle

Bits identifying the font’s style; see MacStyle

pub fn lowest_rec_ppem(&self) -> u16

Smallest readable size in pixels.

pub fn font_direction_hint(&self) -> i16

Deprecated (Set to 2).

pub fn index_to_loc_format(&self) -> i16

0 for short offsets (Offset16), 1 for long (Offset32).

pub fn glyph_data_format(&self) -> i16

0 for current format.

Trait Implementations

impl<'a> FontRead<'a> for Head<'a>

fn read(data: FontData<'a>) -> Result<Self, ReadError>

Read an instance of Self from the provided data, performing validation.

impl TopLevelTable for Head<'_>

const TAG: Tag = _

head