Trait FontPlatform 

pub trait FontPlatform {
    // Provided methods
    fn resolve_font_handle(
        &mut self,
        _name: &[i32],
        _size: i32,
    ) -> Option<PortableFontHandle> { ... }
    fn release_font_handle(
        &mut self,
        _font: PortableFontHandle,
        _type_flag: i32,
    ) { ... }
    fn font_table(&self) -> Vec<(PortableFontHandle, String, i32)> { ... }
    fn restore_font_table(
        &mut self,
        _table: &[(PortableFontHandle, String, i32)],
    ) -> bool { ... }
    fn font_metrics(&mut self, _font: PortableFontHandle) -> PortableFontMetrics { ... }
    fn opentype_font_metrics(
        &mut self,
        font: PortableFontHandle,
    ) -> PortableFontMetrics { ... }
    fn is_opentype_math_font(&mut self, _font: PortableFontHandle) -> bool { ... }
    fn using_opentype(&mut self, _font: PortableFontHandle) -> bool { ... }
    fn math_symbol_parameter(
        &mut self,
        _font: PortableFontHandle,
        _parameter: i32,
    ) -> i32 { ... }
    fn math_extension_parameter(
        &mut self,
        _font: PortableFontHandle,
        _parameter: i32,
    ) -> i32 { ... }
    fn opentype_math_constant(
        &mut self,
        _font: PortableFontHandle,
        _constant: i32,
    ) -> i32 { ... }
    fn opentype_math_accent_position(
        &mut self,
        _font: PortableFontHandle,
        _glyph: i32,
    ) -> i32 { ... }
    fn math_glyph_italic_correction(
        &mut self,
        _font: PortableFontHandle,
        _glyph: i32,
    ) -> i32 { ... }
    fn math_glyph_variant(
        &mut self,
        _font: PortableFontHandle,
        _glyph: i32,
        _index: u16,
        _horizontal: bool,
    ) -> Option<PortableMathVariant> { ... }
    fn math_glyph_assembly(
        &mut self,
        _font: PortableFontHandle,
        _glyph: i32,
        _horizontal: bool,
    ) -> Vec<PortableMathAssemblyPart> { ... }
    fn math_min_connector_overlap(&mut self, _font: PortableFontHandle) -> i32 { ... }
    fn math_kern_at(
        &mut self,
        _font: PortableFontHandle,
        _glyph: i32,
        _corner: PortableMathKernCorner,
        _correction_height: i32,
    ) -> i32 { ... }
    fn math_points_to_units(
        &mut self,
        _font: PortableFontHandle,
        _points: f32,
    ) -> f32 { ... }
    fn math_units_to_scaled(
        &mut self,
        _font: PortableFontHandle,
        _units: i32,
    ) -> i32 { ... }
    fn math_point_size(&mut self, _font: PortableFontHandle) -> f32 { ... }
    fn map_char_to_glyph(
        &mut self,
        _font: PortableFontHandle,
        _codepoint: i32,
    ) -> i32 { ... }
    fn map_glyph_to_index(
        &mut self,
        _font: PortableFontHandle,
        _name: &str,
    ) -> i32 { ... }
    fn ot_font_get(
        &mut self,
        _font: PortableFontHandle,
        _what: i32,
        _param1: i32,
        _param2: i32,
        _param3: i32,
    ) -> i32 { ... }
    fn font_spec(&self, _font: PortableFontHandle) -> Option<String> { ... }
    fn shape_native_text(
        &mut self,
        _font: PortableFontHandle,
        _text: &[u16],
        _use_glyph_metrics: bool,
    ) -> PortableNativeTextMetrics { ... }
    fn measure_native_glyph(
        &mut self,
        _font: PortableFontHandle,
        _glyph: u16,
        _use_glyph_metrics: bool,
    ) -> PortableNativeGlyphMetrics { ... }
}

Provided Methods

fn resolve_font_handle( &mut self, _name: &[i32], _size: i32, ) -> Option<PortableFontHandle>

fn release_font_handle(&mut self, _font: PortableFontHandle, _type_flag: i32)

fn font_table(&self) -> Vec<(PortableFontHandle, String, i32)>

Snapshot the platform’s native-font table as (handle, spec, size) tuples. A serialized format image keeps integer font handles in fontlayoutengine, but those handles only mean something to the platform that minted them; capturing the table lets a cold load rebind them.

fn restore_font_table( &mut self, _table: &[(PortableFontHandle, String, i32)], ) -> bool

Rebuild the native-font table from a Self::font_table snapshot, (re)loading each font at its original handle so the fontlayoutengine handles preserved in a reloaded format image resolve again. Returns false if any font failed to load.

fn font_metrics(&mut self, _font: PortableFontHandle) -> PortableFontMetrics

fn opentype_font_metrics( &mut self, font: PortableFontHandle, ) -> PortableFontMetrics

fn is_opentype_math_font(&mut self, _font: PortableFontHandle) -> bool

fn using_opentype(&mut self, _font: PortableFontHandle) -> bool

Whether font is shaped through the OpenType (HarfBuzz/rustybuzz) shaper. Mirrors XeTeX’s usingOpenType, which is true for the "ot" shaper (the default). This engine always shapes native fonts with rustybuzz, so any loaded native font handle returns true.

fn math_symbol_parameter( &mut self, _font: PortableFontHandle, _parameter: i32, ) -> i32

fn math_extension_parameter( &mut self, _font: PortableFontHandle, _parameter: i32, ) -> i32

fn opentype_math_constant( &mut self, _font: PortableFontHandle, _constant: i32, ) -> i32

fn opentype_math_accent_position( &mut self, _font: PortableFontHandle, _glyph: i32, ) -> i32

fn math_glyph_italic_correction( &mut self, _font: PortableFontHandle, _glyph: i32, ) -> i32

OpenType MATH italic correction for a glyph, in scaled points.

fn math_glyph_variant( &mut self, _font: PortableFontHandle, _glyph: i32, _index: u16, _horizontal: bool, ) -> Option<PortableMathVariant>

The index-th larger MATH glyph variant of glyph (horizontal or vertical), or None when there is no such variant. The advance is in scaled points.

fn math_glyph_assembly( &mut self, _font: PortableFontHandle, _glyph: i32, _horizontal: bool, ) -> Vec<PortableMathAssemblyPart>

The MATH glyph-assembly parts for glyph (horizontal or vertical), each metric in scaled points. Empty when the glyph has no assembly.

fn math_min_connector_overlap(&mut self, _font: PortableFontHandle) -> i32

The MATH minimum connector overlap for assembly parts, in scaled points.

fn math_kern_at( &mut self, _font: PortableFontHandle, _glyph: i32, _corner: PortableMathKernCorner, _correction_height: i32, ) -> i32

One MATH MathKernInfo corner evaluated at correction_height (font design units), returned in raw font design units (NOT scaled).

fn math_points_to_units( &mut self, _font: PortableFontHandle, _points: f32, ) -> f32

Convert a measurement in points to font design units for font (pointsToUnits).

fn math_units_to_scaled( &mut self, _font: PortableFontHandle, _units: i32, ) -> i32

Convert a measurement in font design units to scaled points for font (D2Fix(unitsToPoints(...))).

fn math_point_size(&mut self, _font: PortableFontHandle) -> f32

The point size at which font was loaded (getPointSize).

fn map_char_to_glyph( &mut self, _font: PortableFontHandle, _codepoint: i32, ) -> i32

fn map_glyph_to_index(&mut self, _font: PortableFontHandle, _name: &str) -> i32

fn ot_font_get( &mut self, _font: PortableFontHandle, _what: i32, _param1: i32, _param2: i32, _param3: i32, ) -> i32

OpenType layout enumeration backing the \XeTeXOT* / \XeTeXcountglyphs last_item primitives (XeTeX ot_font_get/_1/_2/_3). what is the XeTeX_ext code (1 = count glyphs, 16 = count scripts, 17 = count languages, 18 = count features, 19 = script tag, 20 = language tag, 21 = feature tag); unused params are 0.

fn font_spec(&self, _font: PortableFontHandle) -> Option<String>

The \font spec string a loaded handle was created from (e.g. [latinmodern-math.otf]:script=math;ssty=1). Immutable so the read-only IR-building path can recover the originating font file for a glyph run.

fn shape_native_text( &mut self, _font: PortableFontHandle, _text: &[u16], _use_glyph_metrics: bool, ) -> PortableNativeTextMetrics

fn measure_native_glyph( &mut self, _font: PortableFontHandle, _glyph: u16, _use_glyph_metrics: bool, ) -> PortableNativeGlyphMetrics

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl FontPlatform for EmptyFontPlatform