Struct Scale26Dot6 

pub struct Scale26Dot6 {
    x: Fixed,
    y: Fixed,
    ppem: f32,
}

Scales design-unit metrics to 26.6 pixels with 16.16 fixed-point arithmetic.

Sums saturate and halves round toward negative infinity. A measurement with a fraction is rounded to a whole unit before it is scaled; ScaleF32 keeps the fraction.

Fields

x: Fixed

y: Fixed

ppem: f32

Implementations

impl Scale26Dot6

pub fn new(x_ppem: f32, y_ppem: f32, units_per_em: u16) -> Self

Creates a scale with a separate size for each axis.

pub fn from_ppem(ppem: f32, units_per_em: u16) -> Self

Creates a scale that maps units_per_em font units to ppem pixels.

fn factor(ppem: f32, units_per_em: u16) -> Fixed

Returns the factor that converts whole font units to 26.6 pixels.

The factor includes the conversion to 1/64 pixel, so a 16.16 multiply of a whole design unit produces 26.6 bits.

fn scale(value: F48Dot16, factor: Fixed) -> F26Dot6

Trait Implementations

impl Clone for Scale26Dot6

fn clone(&self) -> Scale26Dot6

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Scale26Dot6

impl Debug for Scale26Dot6

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

Formats the value using the given formatter.

impl Scale for Scale26Dot6

type Value = F26Dot6

What a scaled measurement is expressed as.

fn add(a: F26Dot6, b: F26Dot6) -> F26Dot6

Returns a plus b.

fn sub(a: F26Dot6, b: F26Dot6) -> F26Dot6

Returns a less b.

fn half(value: F26Dot6) -> F26Dot6

Returns half of value.

fn scale_x(&self, value: F48Dot16) -> F26Dot6

Scales a measurement along the x axis.

fn scale_y(&self, value: F48Dot16) -> F26Dot6

Scales a measurement along the y axis.

fn scale_glyph_extents( &self, e: GlyphExtents<F48Dot16>, ) -> GlyphExtents<F26Dot6>

Scales where a glyph’s ink sits.

fn scale_rect(&self, b: BoundingBox<F48Dot16>) -> BoundingBox<F26Dot6>

Scales a region given by its corners.

fn ppem(&self) -> Option<f32>

Returns the size in pixels per em, if the scale has one.