Struct hb_ot_shaper_t 

pub struct hb_ot_shaper_t {

    pub collect_features: Option<fn(&mut hb_ot_shape_planner_t<'_>)>,
    pub override_features: Option<fn(&mut hb_ot_shape_planner_t<'_>)>,
    pub create_data: Option<fn(&hb_ot_shape_plan_t) -> Box<dyn Any + Send + Sync>>,
    pub preprocess_text: Option<fn(&hb_ot_shape_plan_t, &hb_font_t<'_>, &mut hb_buffer_t)>,
    pub postprocess_glyphs: Option<fn(&hb_ot_shape_plan_t, &hb_font_t<'_>, &mut hb_buffer_t)>,
    pub normalization_preference: i32,
    pub decompose: Option<fn(&hb_ot_shape_normalize_context_t<'_>, char) -> Option<(char, char)>>,
    pub compose: Option<fn(&hb_ot_shape_normalize_context_t<'_>, char, char) -> Option<char>>,
    pub setup_masks: Option<fn(&hb_ot_shape_plan_t, &hb_font_t<'_>, &mut hb_buffer_t)>,
    pub gpos_tag: Option<Tag>,
    pub reorder_marks: Option<fn(&hb_ot_shape_plan_t, &mut hb_buffer_t, usize, usize)>,
    pub zero_width_marks: u32,
    pub fallback_position: bool,
}

Fields

collect_features: Option<fn(&mut hb_ot_shape_planner_t<'_>)>

Called during shape_plan(). Shapers should use plan.map to add their features and callbacks.

override_features: Option<fn(&mut hb_ot_shape_planner_t<'_>)>

Called during shape_plan(). Shapers should use plan.map to override features and add callbacks after common features are added.

create_data: Option<fn(&hb_ot_shape_plan_t) -> Box<dyn Any + Send + Sync>>

Called at the end of shape_plan(). Whatever shapers return will be accessible through plan.data() later.

preprocess_text: Option<fn(&hb_ot_shape_plan_t, &hb_font_t<'_>, &mut hb_buffer_t)>

Called during shape(). Shapers can use to modify text before shaping starts.

postprocess_glyphs: Option<fn(&hb_ot_shape_plan_t, &hb_font_t<'_>, &mut hb_buffer_t)>

Called during shape(). Shapers can use to modify text before shaping starts.

normalization_preference: i32

How to normalize.

decompose: Option<fn(&hb_ot_shape_normalize_context_t<'_>, char) -> Option<(char, char)>>

Called during shape()’s normalization.

compose: Option<fn(&hb_ot_shape_normalize_context_t<'_>, char, char) -> Option<char>>

Called during shape()’s normalization.

setup_masks: Option<fn(&hb_ot_shape_plan_t, &hb_font_t<'_>, &mut hb_buffer_t)>

Called during shape(). Shapers should use map to get feature masks and set on buffer. Shapers may NOT modify characters.

gpos_tag: Option<Tag>

If not None, then must match found GPOS script tag for GPOS to be applied. Otherwise, fallback positioning will be used.

reorder_marks: Option<fn(&hb_ot_shape_plan_t, &mut hb_buffer_t, usize, usize)>

Called during shape(). Shapers can use to modify ordering of combining marks.

zero_width_marks: u32

If and when to zero-width marks.

fallback_position: bool

Whether to use fallback mark positioning.