# Struct GlyphBuffer

    pub struct GlyphBuffer(/* private fields */);

Expand description

A buffer that contains the results of the shaping process.

## Implementations§

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### impl GlyphBuffer

#### pub fn len(&self) -> usize

Returns the length of the data of the buffer.

When called before shaping this is the number of unicode codepoints contained in the buffer. When called after shaping it returns the number of glyphs stored.

#### pub fn is_empty(&self) -> bool

Returns `true` if the buffer contains no elements.

#### pub fn glyph_infos(&self) -> &[GlyphInfo]

Get the glyph infos.

#### pub fn glyph_positions(&self) -> &[GlyphPosition]

Get the glyph positions.

#### pub fn clear(self) -> UnicodeBuffer

Clears the content of the glyph buffer and returns an empty `UnicodeBuffer` reusing the existing allocation.

#### pub fn serialize(&self, face: &hb_font_t<'_>, flags: SerializeFlags) -> String

Converts the glyph buffer content into a string.

## Trait Implementations§

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### impl Debug for GlyphBuffer

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

Formats the value using the given formatter. Read more

## Auto Trait Implementations§

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### impl !Freeze for GlyphBuffer

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### impl RefUnwindSafe for GlyphBuffer

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### impl Send for GlyphBuffer

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### impl Sync for GlyphBuffer

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### impl Unpin for GlyphBuffer

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### impl UnwindSafe for GlyphBuffer

## Blanket Implementations§

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### impl<S, D, Swp, Dwp, T> AdaptInto<D, Swp, Dwp, T> for S
where T: Real + Zero + Arithmetics + Clone, Swp: WhitePoint<T>, Dwp: WhitePoint<T>, D: AdaptFrom<S, Swp, Dwp, T>,

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#### fn adapt_into_using<M>(self, method: M) -> D
where M: TransformMatrix<T>,

Convert the source color to the destination color using the specified method.
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#### fn adapt_into(self) -> D

Convert the source color to the destination color using the bradford method by default.
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### impl<T> Also for T

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#### fn also<F>(self, block: F) -> Self
where F: FnOnce(&mut Self),

Apply a function to this value and return the (possibly) modified value.
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### impl<T> Any for T
where T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T, Res> Apply<Res> for T
where T: ?Sized,

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#### fn apply<F>(self, f: F) -> Res
where F: FnOnce(Self) -> Res, Self: Sized,

Apply a function which takes the parameter by value.
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#### fn apply_ref<F>(&self, f: F) -> Res
where F: FnOnce(&Self) -> Res,

Apply a function which takes the parameter by reference.
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#### fn apply_mut<F>(&mut self, f: F) -> Res
where F: FnOnce(&mut Self) -> Res,

Apply a function which takes the parameter by mutable reference.
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### impl<T, C> ArraysFrom<C> for T
where C: IntoArrays<T>,

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#### fn arrays_from(colors: C) -> T

Cast a collection of colors into a collection of arrays.
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### impl<T, C> ArraysInto<C> for T
where C: FromArrays<T>,

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#### fn arrays_into(self) -> C

Cast this collection of arrays into a collection of colors.
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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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### impl<WpParam, T, U> Cam16IntoUnclamped<WpParam, T> for U
where T: FromCam16Unclamped<WpParam, U>,

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#### type Scalar = <T as FromCam16Unclamped<WpParam, U>>::Scalar

The number type that’s used in `parameters` when converting.
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#### fn cam16_into_unclamped( self, parameters: BakedParameters<WpParam, <U as Cam16IntoUnclamped<WpParam, T>>::Scalar>, ) -> T

Converts `self` into `C`, using the provided parameters.
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### impl<T, C> ComponentsFrom<C> for T
where C: IntoComponents<T>,

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#### fn components_from(colors: C) -> T

Cast a collection of colors into a collection of color components.
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### impl<T> Downcast for T
where T: Any,

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#### 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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#### fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

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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#### fn as_any(&self) -> &(dyn Any + 'static)

Convert `&Trait` (where `Trait: Downcast`) to `&Any`. This is needed since Rust cannot generate `&Any`’s vtable from `&Trait`’s.
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#### fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert `&mut Trait` (where `Trait: Downcast`) to `&Any`. This is needed since Rust cannot generate `&mut Any`’s vtable from `&mut Trait`’s.
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### impl<T> DowncastSync for T
where T: Any + Send + Sync,

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#### fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Sync + Send>

Convert `Arc<Trait>` (where `Trait: Downcast`) to `Arc<Any>`. `Arc<Any>` can then be further `downcast` into `Arc<ConcreteType>` where `ConcreteType` implements `Trait`.
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T> FromAngle<T> for T

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#### fn from_angle(angle: T) -> T

Performs a conversion from `angle`.
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### impl<T, U> FromStimulus<U> for T
where U: IntoStimulus<T>,

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#### fn from_stimulus(other: U) -> T

Converts `other` into `Self`, while performing the appropriate scaling, rounding and clamping.
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### impl<T> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided [`Span`], returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more
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### impl<T, U> Into<U> for T
where U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T, U> IntoAngle<U> for T
where U: FromAngle<T>,

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#### fn into_angle(self) -> U

Performs a conversion into `T`.
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### impl<State, Message> IntoBoot<State, Message> for State

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#### fn into_boot(self) -> (State, Task<Message>)

Turns some type into the initial state of some `Application`.
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### impl<WpParam, T, U> IntoCam16Unclamped<WpParam, T> for U
where T: Cam16FromUnclamped<WpParam, U>,

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#### type Scalar = <T as Cam16FromUnclamped<WpParam, U>>::Scalar

The number type that’s used in `parameters` when converting.
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#### fn into_cam16_unclamped( self, parameters: BakedParameters<WpParam, <U as IntoCam16Unclamped<WpParam, T>>::Scalar>, ) -> T

Converts `self` into `C`, using the provided parameters.
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### impl<T, U> IntoColor<U> for T
where U: FromColor<T>,

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#### fn into_color(self) -> U

Convert into T with values clamped to the color defined bounds Read more
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### impl<T, U> IntoColorUnclamped<U> for T
where U: FromColorUnclamped<T>,

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#### fn into_color_unclamped(self) -> U

Convert into T. The resulting color might be invalid in its color space Read more
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### impl<T> IntoStimulus<T> for T

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#### fn into_stimulus(self) -> T

Converts `self` into `T`, while performing the appropriate scaling, rounding and clamping.
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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### impl<T, C> TryComponentsInto<C> for T
where C: TryFromComponents<T>,

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#### type Error = <C as TryFromComponents<T>>::Error

The error for when `try_into_colors` fails to cast.
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#### fn try_components_into(self) -> Result<C, <T as TryComponentsInto<C>>::Error>

Try to cast this collection of color components into a collection of colors. Read more
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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### impl<T, U> TryIntoColor<U> for T
where U: TryFromColor<T>,

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#### fn try_into_color(self) -> Result<U, OutOfBounds<U>>

Convert into T, returning ok if the color is inside of its defined range, otherwise an `OutOfBounds` error is returned which contains the unclamped color. Read more
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### impl<C, U> UintsFrom<C> for U
where C: IntoUints<U>,

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#### fn uints_from(colors: C) -> U

Cast a collection of colors into a collection of unsigned integers.
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### impl<C, U> UintsInto<C> for U
where C: FromUints<U>,

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#### fn uints_into(self) -> C

Cast this collection of unsigned integers into a collection of colors.
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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more
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### impl<T> MaybeClone for T

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### impl<T> MaybeDebug for T

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### impl<T> MaybeSend for T
where T: Send,

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### impl<T> MaybeSend for T
where T: Send,

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### impl<T> MaybeSync for T
where T: Sync,

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### impl<T> MaybeSync for T
where T: Sync,