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 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 StructuralPartialEq for GlyphSlot