# Enum Target

    pub enum Target {
        Mono,
        Smooth {
            mode: SmoothMode,
            symmetric_rendering: bool,
            preserve_linear_metrics: bool,
        },
    }

Expand description

Defines the target settings for hinting.

## Variants§

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### Mono

Strong hinting style that should only be used for aliased, monochromatic rasterization.

Corresponds to `FT_LOAD_TARGET_MONO` in FreeType.

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### Smooth

Hinting style that is suitable for anti-aliased rasterization.

Corresponds to the non-monochrome load targets in FreeType. See `SmoothMode` for more detail.

#### Fields

§`mode: SmoothMode`

The basic mode for smooth hinting.

Defaults to `SmoothMode::Normal`.

§`symmetric_rendering: bool`

If true, TrueType bytecode may assume that the resulting outline will be rasterized with supersampling in the vertical direction.

When this is enabled, ClearType fonts will often generate wider horizontal stems that may lead to blurry images when rendered with an analytical area rasterizer (such as the one in FreeType).

The effect of this setting is to control the “ClearType symmetric rendering bit” of the TrueType `GETINFO` instruction. For more detail, see this issue.

FreeType has no corresponding setting and behaves as if this is always enabled.

This only applies to the TrueType interpreter.

Defaults to `true`.

§`preserve_linear_metrics: bool`

If true, prevents adjustment of the outline in the horizontal direction and preserves inter-glyph spacing.

This is useful for performing layout without concern that hinting will modify the advance width of a glyph. Specifically, it means that layout will not require evaluation of glyph outlines.

FreeType has no corresponding setting and behaves as if this is always disabled.

This applies to the TrueType interpreter and the automatic hinter.

Defaults to `false`.

## Trait Implementations§

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### impl Clone for Target

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#### fn clone(&self) -> Target

Returns a duplicate of the value. Read more
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#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`. Read more
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### impl Debug for Target

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

Formats the value using the given formatter. Read more
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### impl Default for Target

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#### fn default() -> Target

Returns the “default value” for a type. Read more
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### impl From<SmoothMode> for Target

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#### fn from(value: SmoothMode) -> Target

Converts to this type from the input type.
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### impl From<Target> for HintingOptions

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#### fn from(value: Target) -> HintingOptions

Converts to this type from the input type.
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### impl PartialEq for Target

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

Tests for `self` and `other` values to be equal, and is used by `==`.
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#### fn ne(&self, other: &Rhs) -> bool

Tests for `!=`. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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### impl Copy for Target

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### impl Eq for Target

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### impl StructuralPartialEq for Target

## Auto Trait Implementations§

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### impl Freeze for Target

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### impl RefUnwindSafe for Target

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### impl Send for Target

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### impl Sync for Target

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### impl Unpin for Target

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### impl UnwindSafe for Target

## 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> AnyEq for T
where T: Any + PartialEq,

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#### fn equals(&self, other: &(dyn Any + 'static)) -> bool

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

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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> CloneToUninit for T
where T: Clone,

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#### unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dest`. Read more
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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<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Compare self to `key` and return `true` if they are equal.
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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> NoneValue for T
where T: Default,

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#### type NoneType = T

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#### fn null_value() -> T

The none-equivalent value.
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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> ToOwned for T
where T: Clone,

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#### type Owned = T

The resulting type after obtaining ownership.
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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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,