Struct GlyphInfo

#[repr(C)]pub struct GlyphInfo {
    pub glyph_id: u32,
    pub cluster: u32,
    /* private fields */
}

Expand description

A glyph info.

Fields§

§glyph_id: u32

A selected glyph.

Guarantee to be <= u16::MAX.

§cluster: u32

An index to the start of the grapheme cluster in the original string.

Read more on clusters.

Implementations§

impl hb_glyph_info_t

pub fn unsafe_to_break(&self) -> bool

Indicates that if input text is broken at the beginning of the cluster this glyph is part of, then both sides need to be re-shaped, as the result might be different.

On the flip side, it means that when this flag is not present, then it’s safe to break the glyph-run at the beginning of this cluster, and the two sides represent the exact same result one would get if breaking input text at the beginning of this cluster and shaping the two sides separately. This can be used to optimize paragraph layout, by avoiding re-shaping of each line after line-breaking, or limiting the reshaping to a small piece around the breaking point only.

Trait Implementations§

impl Clone for hb_glyph_info_t

fn clone(&self) -> hb_glyph_info_t

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 hb_glyph_info_t

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

Formats the value using the given formatter. Read more

impl Default for hb_glyph_info_t

fn default() -> hb_glyph_info_t

Returns the “default value” for a type. Read more

impl Zeroable for hb_glyph_info_t

fn zeroed() -> Self

Calls zeroed. Read more

impl Copy for hb_glyph_info_t

impl Pod for hb_glyph_info_t

Auto Trait Implementations§

impl Freeze for hb_glyph_info_t

impl RefUnwindSafe for hb_glyph_info_t

impl Send for hb_glyph_info_t

impl Sync for hb_glyph_info_t

impl Unpin for hb_glyph_info_t

impl UnwindSafe for hb_glyph_info_t

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<T> CheckedBitPattern for T
where T: AnyBitPattern,

type Bits = T

Self must have the same layout as the specified Bits except for the possible invalid bit patterns being checked during is_valid_bit_pattern.

fn is_valid_bit_pattern(_bits: &T) -> bool

If this function returns true, then it must be valid to reinterpret bits as &Self.

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dst. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

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

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

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

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<T> AnyBitPattern for T
where T: Pod,

impl<T> NoUninit for T
where T: Pod,