pub struct GlyphSlot { /* private fields */ }
Expand description

A struct encapsulating the space for a glyph within a Library

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impl GlyphSlot

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pub unsafe fn from_raw(library_raw: FT_Library, raw: FT_GlyphSlot) -> Self

Create a GlyphSlot from its constituent C parts

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pub fn render_glyph(&self, render_mode: RenderMode) -> FtResult<()>

Convert a given glyph image to a bitmap. It does so by inspecting the glyph image format, finding the relevant renderer, and invoking it.

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pub fn get_subglyph_info(&self, sub_index: u32) -> FtResult<SubGlyphInfo>

Retrieve a description of a given subglyph. Only use it if the glyph’s format is FT_GLYPH_FORMAT_COMPOSITE; an error is returned otherwise.

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pub fn get_glyph(&self) -> FtResult<Glyph>

Returns a glyph object, that is similar to a GlyphSlot but managed outside of the library

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pub fn outline(&self) -> Option<Outline<'_>>

In freetype, the Outline object is a scalable glyph. This method unpacks a glyph into this object, or returns None if the glyph has no outline

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pub fn bitmap(&self) -> Bitmap

This field is used as a bitmap descriptor when the slot format is FT_GLYPH_FORMAT_BITMAP. Note that the address and content of the bitmap buffer can change between calls of FT_Load_Glyph and a few other functions.

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pub fn bitmap_left(&self) -> i32

The bitmap’s left bearing expressed in integer pixels. Only valid if the format is FT_GLYPH_FORMAT_BITMAP, this is, if the glyph slot contains a bitmap.

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pub fn bitmap_top(&self) -> i32

The bitmap’s top bearing expressed in integer pixels. Remember that this is the distance from the baseline to the top-most glyph scanline, upwards y coordinates being positive.

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pub fn advance(&self) -> Vector

This shorthand is, depending on FT_LOAD_IGNORE_TRANSFORM, the transformed (hinted) advance width for the glyph, in 26.6 fractional pixel format. As specified with FT_LOAD_VERTICAL_LAYOUT, it uses either the ‘horiAdvance’ or the ‘vertAdvance’ value of ‘metrics’ field.

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pub fn linear_hori_advance(&self) -> FT_Fixed

The advance width of the unhinted glyph. Its value is expressed in 16.16 fractional pixels, unless FT_LOAD_LINEAR_DESIGN is set when loading the glyph. This field can be important to perform correct WYSIWYG layout. Only relevant for outline glyphs.

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pub fn linear_vert_advance(&self) -> FT_Fixed

The advance height of the unhinted glyph. Its value is expressed in 16.16 fractional pixels, unless FT_LOAD_LINEAR_DESIGN is set when loading the glyph. This field can be important to perform correct WYSIWYG layout. Only relevant for outline glyphs.

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pub fn metrics(&self) -> GlyphMetrics

The metrics of the last loaded glyph in the slot. The returned values depend on the last load flags (see the FT_Load_Glyph API function) and can be expressed either in 26.6 fractional pixels or font units.

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pub fn raw(&self) -> &FT_GlyphSlotRec

Get a pointer to the underlying c struct

Trait Implementations§

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impl Clone for GlyphSlot

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fn clone(&self) -> GlyphSlot

Returns a copy 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 Hash for GlyphSlot

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq<GlyphSlot> for GlyphSlot

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

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

This method 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 GlyphSlot

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impl Eq for GlyphSlot

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impl StructuralEq for GlyphSlot

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impl StructuralPartialEq for GlyphSlot

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere 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> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

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

const: unstable · source§

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source§

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> ToOwned for Twhere 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, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

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 Twhere U: TryFrom<T>,

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

The type returned in the event of a conversion error.
const: unstable · source§

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

Performs the conversion.