Struct Shaper

pub(crate) struct Shaper<'a> {
    font: FontRef<'a>,
    mode: ShaperMode,
    charmap: Charmap<'a>,
    gsub: Option<Gsub<'a>>,
}

Maps characters to glyphs and handles extended style coverage beyond glyphs that are available in the character map.

Roughly covers the functionality in https://gitlab.freedesktop.org/freetype/freetype/-/blob/57617782464411201ce7bbc93b086c1b4d7d84a5/src/autofit/afshaper.c.

Fields

font: FontRef<'a>

mode: ShaperMode

charmap: Charmap<'a>

gsub: Option<Gsub<'a>>

Implementations

impl<'a> Shaper<'a>

pub fn new(font: &FontRef<'a>, mode: ShaperMode) -> Self

pub fn font(&self) -> &FontRef<'a>

pub fn charmap(&self) -> &Charmap<'a>

pub fn lookup_count(&self) -> u16

pub fn cluster_shaper(&'a self, style: &StyleClass) -> ClusterShaper<'a>

pub(crate) fn compute_coverage( &self, style: &StyleClass, coverage_kind: ShaperCoverageKind, glyph_styles: &mut [GlyphStyle], visited_set: &mut VisitedLookupSet<'_>, ) -> bool

Uses layout tables to compute coverage for the given style.

Returns true if any glyph styles were updated for this style.

See https://gitlab.freedesktop.org/freetype/freetype/-/blob/57617782464411201ce7bbc93b086c1b4d7d84a5/src/autofit/afshaper.c#L99