Struct freetype::glyph_slot::GlyphSlot

pub struct GlyphSlot { /* private fields */ }

A struct encapsulating the space for a glyph within a Library

Implementations

impl GlyphSlot

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

Create a GlyphSlot from its constituent C parts

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.

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.

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

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

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

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.

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.

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.

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.

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.

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.

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.

pub fn raw(&self) -> &FT_GlyphSlotRec

Get a pointer to the underlying c struct

Trait Implementations

impl Clone for GlyphSlot

fn clone(&self) -> GlyphSlot

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Hash for GlyphSlot

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<GlyphSlot> for GlyphSlot

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

This method tests for self and other values to be equal, and is used by ==.

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.

impl Copy for GlyphSlot

impl Eq for GlyphSlot

impl StructuralEq for GlyphSlot

impl StructuralPartialEq for GlyphSlot