Struct kas_core::text::fonts::FaceRef

impl FaceRef

pub fn glyph_index(&self, c: char) -> GlyphId

Get glyph identifier for a char

If the char is not found, GlyphId(0) is returned (the ‘missing glyph’ representation).

pub fn dpu(self, dpem: f32) -> DPU

Convert dpem to dpu

Output: a font-specific scale.

Input: dpem is pixels/em

dpem
  = pt_size × dpp
  = pt_size × dpi / 72
  = pt_size × scale_factor × (96 / 72)

pub fn scale_by_dpem(self, dpem: f32) -> ScaledFaceRef

Get a scaled reference

Units: dpem is dots (pixels) per Em (module documentation).

pub fn scale_by_dpu(self, dpu: DPU) -> ScaledFaceRef

Get a scaled reference

Units: dpu is dots (pixels) per font-unit (see module documentation).

pub fn height(&self, dpem: f32) -> f32

Get the height of horizontal text in pixels

Units: dpem is dots (pixels) per Em (module documentation).

Trait Implementations§

impl Clone for FaceRef

fn clone(&self) -> FaceRef

Returns a copy of the value. Read more

1.0.0 · source§

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

Performs copy-assignment from source. Read more

impl Debug for FaceRef

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

Formats the value using the given formatter. Read more

impl Copy for FaceRef

Auto Trait Implementations§

impl UnwindSafe for FaceRef

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<S, T> Cast<T> for S
where T: Conv<S>,

fn cast(self) -> T

Cast from Self to T Read more

fn try_cast(self) -> Result<T, Error>

Try converting from Self to T Read more

impl<S, T> CastApprox<T> for S
where T: ConvApprox<S>,

fn try_cast_approx(self) -> Result<T, Error>

Try approximate conversion from Self to T Read more

fn cast_approx(self) -> T

Cast approximately from Self to T Read more

impl<S, T> CastFloat<T> for S
where T: ConvFloat<S>,

fn cast_trunc(self) -> T

Cast to integer, truncating Read more

fn cast_nearest(self) -> T

Cast to the nearest integer Read more

fn cast_floor(self) -> T

Cast the floor to an integer Read more

fn cast_ceil(self) -> T

Cast the ceiling to an integer Read more

fn try_cast_trunc(self) -> Result<T, Error>

Try converting to integer with truncation Read more

fn try_cast_nearest(self) -> Result<T, Error>

Try converting to the nearest integer Read more

fn try_cast_floor(self) -> Result<T, Error>

Try converting the floor to an integer Read more

fn try_cast_ceil(self) -> Result<T, Error>

Try convert the ceiling to an integer Read more

impl<T> Downcast for T
where T: Any,

fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.

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Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

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Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

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Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.

impl<T> DowncastSync for T
where T: Any + Send + Sync,

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Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.