Struct FontMetrics 

#[repr(C)]
pub struct FontMetrics {

    pub units_per_em: u16,
    pub font_flags: u16,
    pub x_min: i16,
    pub y_min: i16,
    pub x_max: i16,
    pub y_max: i16,
    pub ascender: i16,
    pub descender: i16,
    pub line_gap: i16,
    pub advance_width_max: u16,
    pub min_left_side_bearing: i16,
    pub min_right_side_bearing: i16,
    pub x_max_extent: i16,
    pub caret_slope_rise: i16,
    pub caret_slope_run: i16,
    pub caret_offset: i16,
    pub num_h_metrics: u16,
    pub x_avg_char_width: i16,
    pub us_weight_class: u16,
    pub us_width_class: u16,
    pub fs_type: u16,
    pub y_subscript_x_size: i16,
    pub y_subscript_y_size: i16,
    pub y_subscript_x_offset: i16,
    pub y_subscript_y_offset: i16,
    pub y_superscript_x_size: i16,
    pub y_superscript_y_size: i16,
    pub y_superscript_x_offset: i16,
    pub y_superscript_y_offset: i16,
    pub y_strikeout_size: i16,
    pub y_strikeout_position: i16,
    pub s_family_class: i16,
    pub panose: Panose,
    pub ul_unicode_range1: u32,
    pub ul_unicode_range2: u32,
    pub ul_unicode_range3: u32,
    pub ul_unicode_range4: u32,
    pub ach_vend_id: u32,
    pub fs_selection: u16,
    pub us_first_char_index: u16,
    pub us_last_char_index: u16,
    pub s_typo_ascender: OptionI16,
    pub s_typo_descender: OptionI16,
    pub s_typo_line_gap: OptionI16,
    pub us_win_ascent: OptionU16,
    pub us_win_descent: OptionU16,
    pub ul_code_page_range1: OptionU32,
    pub ul_code_page_range2: OptionU32,
    pub sx_height: OptionI16,
    pub s_cap_height: OptionI16,
    pub us_default_char: OptionU16,
    pub us_break_char: OptionU16,
    pub us_max_context: OptionU16,
    pub us_lower_optical_point_size: OptionU16,
    pub us_upper_optical_point_size: OptionU16,
}

Font metrics structure containing all font-related measurements from the font file tables (head, hhea, and os/2 tables).

Fields

units_per_em: u16

font_flags: u16

x_min: i16

y_min: i16

x_max: i16

y_max: i16

ascender: i16

descender: i16

line_gap: i16

advance_width_max: u16

min_left_side_bearing: i16

min_right_side_bearing: i16

x_max_extent: i16

caret_slope_rise: i16

caret_slope_run: i16

caret_offset: i16

num_h_metrics: u16

x_avg_char_width: i16

us_weight_class: u16

us_width_class: u16

fs_type: u16

y_subscript_x_size: i16

y_subscript_y_size: i16

y_subscript_x_offset: i16

y_subscript_y_offset: i16

y_superscript_x_size: i16

y_superscript_y_size: i16

y_superscript_x_offset: i16

y_superscript_y_offset: i16

y_strikeout_size: i16

y_strikeout_position: i16

s_family_class: i16

panose: Panose

ul_unicode_range1: u32

ul_unicode_range2: u32

ul_unicode_range3: u32

ul_unicode_range4: u32

ach_vend_id: u32

fs_selection: u16

us_first_char_index: u16

us_last_char_index: u16

s_typo_ascender: OptionI16

s_typo_descender: OptionI16

s_typo_line_gap: OptionI16

us_win_ascent: OptionU16

us_win_descent: OptionU16

ul_code_page_range1: OptionU32

ul_code_page_range2: OptionU32

sx_height: OptionI16

s_cap_height: OptionI16

us_default_char: OptionU16

us_break_char: OptionU16

us_max_context: OptionU16

us_lower_optical_point_size: OptionU16

us_upper_optical_point_size: OptionU16

Implementations

impl FontMetrics

pub const fn zero() -> Self

Only for testing, zero-sized font, will always return 0 for every metric (units_per_em = 1000)

pub fn get_ascender(&self) -> i16

Returns the ascender value from the hhea table

pub fn get_descender(&self) -> i16

Returns the descender value from the hhea table

pub fn get_line_gap(&self) -> i16

Returns the line gap value from the hhea table

pub fn get_advance_width_max(&self) -> u16

Returns the maximum advance width from the hhea table

pub fn get_min_left_side_bearing(&self) -> i16

Returns the minimum left side bearing from the hhea table

pub fn get_min_right_side_bearing(&self) -> i16

Returns the minimum right side bearing from the hhea table

pub fn get_x_min(&self) -> i16

Returns the x_min value from the head table

pub fn get_y_min(&self) -> i16

Returns the y_min value from the head table

pub fn get_x_max(&self) -> i16

Returns the x_max value from the head table

pub fn get_y_max(&self) -> i16

Returns the y_max value from the head table

pub fn get_x_max_extent(&self) -> i16

Returns the maximum extent in the x direction from the hhea table

pub fn get_x_avg_char_width(&self) -> i16

Returns the average character width from the os/2 table

pub fn get_y_subscript_x_size(&self) -> i16

Returns the subscript x size from the os/2 table

pub fn get_y_subscript_y_size(&self) -> i16

Returns the subscript y size from the os/2 table

pub fn get_y_subscript_x_offset(&self) -> i16

Returns the subscript x offset from the os/2 table

pub fn get_y_subscript_y_offset(&self) -> i16

Returns the subscript y offset from the os/2 table

pub fn get_y_superscript_x_size(&self) -> i16

Returns the superscript x size from the os/2 table

pub fn get_y_superscript_y_size(&self) -> i16

Returns the superscript y size from the os/2 table

pub fn get_y_superscript_x_offset(&self) -> i16

Returns the superscript x offset from the os/2 table

pub fn get_y_superscript_y_offset(&self) -> i16

Returns the superscript y offset from the os/2 table

pub fn get_y_strikeout_size(&self) -> i16

Returns the strikeout size from the os/2 table

pub fn get_y_strikeout_position(&self) -> i16

Returns the strikeout position from the os/2 table

pub fn use_typo_metrics(&self) -> bool

Returns whether typographic metrics should be used (from fs_selection flag)

Trait Implementations

impl Clone for FontMetrics

fn clone(&self) -> FontMetrics

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FontMetrics

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

Formats the value using the given formatter.

impl Default for FontMetrics

fn default() -> Self

Returns the “default value” for a type.

impl Hash for FontMetrics

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 FontMetrics

fn cmp(&self, other: &FontMetrics) -> 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,

Restrict a value to a certain interval.

impl PartialEq for FontMetrics

fn eq(&self, other: &FontMetrics) -> 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 PartialOrd for FontMetrics

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Eq for FontMetrics

impl StructuralPartialEq for FontMetrics