diff options
Diffstat (limited to 'components/fonts/font.rs')
| -rw-r--r-- | components/fonts/font.rs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/components/fonts/font.rs b/components/fonts/font.rs index 719ec70f144..67236debef1 100644 --- a/components/fonts/font.rs +++ b/components/fonts/font.rs @@ -49,6 +49,7 @@ pub const KERN: u32 = ot_tag!('k', 'e', 'r', 'n'); pub const SBIX: u32 = ot_tag!('s', 'b', 'i', 'x'); pub const CBDT: u32 = ot_tag!('C', 'B', 'D', 'T'); pub const COLR: u32 = ot_tag!('C', 'O', 'L', 'R'); +pub const BASE: u32 = ot_tag!('B', 'A', 'S', 'E'); pub const LAST_RESORT_GLYPH_ADVANCE: FractionalPixel = 10.0; @@ -89,6 +90,7 @@ pub trait PlatformFontMethods: Sized { fn can_do_fast_shaping(&self) -> bool; fn metrics(&self) -> FontMetrics; fn table_for_tag(&self, _: FontTableTag) -> Option<FontTable>; + fn typographic_bounds(&self, _: GlyphId) -> Rect<f32>; /// Get the necessary [`FontInstanceFlags`]` for this font. fn webrender_font_instance_flags(&self) -> FontInstanceFlags; @@ -464,6 +466,16 @@ impl Font { cache.glyph_advances.insert(glyph_id, new_width); new_width } + + pub fn typographic_bounds(&self, glyph_id: GlyphId) -> Rect<f32> { + self.handle.typographic_bounds(glyph_id) + } + + #[allow(unsafe_code)] + pub fn get_baseline(&self) -> Option<FontBaseline> { + let this = self as *const Font; + unsafe { self.shaper.get_or_init(|| Shaper::new(this)).get_baseline() } + } } pub type FontRef = Arc<Font>; @@ -805,6 +817,12 @@ impl FontFamilyDescriptor { } } +pub struct FontBaseline { + pub ideographic_baseline: f32, + pub alphabetic_baseline: f32, + pub hanging_baseline: f32, +} + /// Given a mapping array `mapping` and a value, map that value onto /// the value specified by the array. For instance, for FontConfig /// values of weights, we would map these onto the CSS [0..1000] range |