Struct write_fonts::tables::hhea::Hhea

pub struct Hhea {
    pub ascender: FWord,
    pub descender: FWord,
    pub line_gap: FWord,
    pub advance_width_max: UfWord,
    pub min_left_side_bearing: FWord,
    pub min_right_side_bearing: FWord,
    pub x_max_extent: FWord,
    pub caret_slope_rise: i16,
    pub caret_slope_run: i16,
    pub caret_offset: i16,
    pub number_of_long_metrics: u16,
}

hhea Horizontal Header Table

Fields

ascender: FWord

Typographic ascent.

descender: FWord

Typographic descent.

line_gap: FWord

Typographic line gap. Negative LineGap values are treated as zero in some legacy platform implementations.

advance_width_max: UfWord

Maximum advance width value in ‘hmtx’ table.

min_left_side_bearing: FWord

Minimum left sidebearing value in ‘hmtx’ table for glyphs with contours (empty glyphs should be ignored).

min_right_side_bearing: FWord

Minimum right sidebearing value; calculated as min(aw - (lsb + xMax - xMin)) for glyphs with contours (empty glyphs should be ignored).

x_max_extent: FWord

Max(lsb + (xMax-xMin))

caret_slope_rise: i16

Used to calculate the slope of the cursor (rise/run); 1 for vertical caret, 0 for horizontal.

caret_slope_run: i16

0 for vertical caret, 1 for horizontal.

caret_offset: i16

The amount by which a slanted highlight on a glyph needs to be shifted to produce the best appearance. Set to 0 for non-slanted fonts

number_of_long_metrics: u16

Number of LongMetric entries in ‘hmtx’/‘vmtx’ table

Implementations

impl Hhea

pub fn new( ascender: FWord, descender: FWord, line_gap: FWord, advance_width_max: UfWord, min_left_side_bearing: FWord, min_right_side_bearing: FWord, x_max_extent: FWord, caret_slope_rise: i16, caret_slope_run: i16, caret_offset: i16, number_of_long_metrics: u16 ) -> Self

Construct a new Hhea

Trait Implementations

impl Clone for Hhea

fn clone(&self) -> Hhea

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Hhea

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

Formats the value using the given formatter.

impl Default for Hhea

fn default() -> Hhea

Returns the “default value” for a type.

impl<'a> FontRead<'a> for Hhea

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

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

impl FontWrite for Hhea

fn write_into(&self, writer: &mut TableWriter)

Write our data and information about offsets into this TableWriter.

fn table_type(&self) -> TableType

The type of this table.

impl Hash for Hhea

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

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 Ord for Hhea

fn cmp(&self, other: &Hhea) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for Hhea

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for Hhea

fn partial_cmp(&self, other: &Hhea) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl TopLevelTable for Hhea

const TAG: Tag = _

The table’s tag.

impl Validate for Hhea

fn validate_impl(&self, _ctx: &mut ValidationCtx)

Validate this table.

fn validate(&self) -> Result<(), ValidationReport>

Ensure that this table is well-formed, reporting any errors.

impl Eq for Hhea

impl StructuralEq for Hhea

impl StructuralPartialEq for Hhea