Add prefer_decomposed() complex-shaper callback
This allows the Indic shaper to request decomposed characters. This will handle split matra for free. Other shapers prefer precomposed characters.
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@ -183,6 +183,12 @@ _hb_ot_shape_complex_collect_features_arabic (hb_ot_map_builder_t *map, const hb
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map->add_bool_feature (HB_TAG('c','s','w','h'));
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}
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bool
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_hb_ot_shape_complex_prefer_decomposed_arabic (void)
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{
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return FALSE;
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}
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void
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_hb_ot_shape_complex_setup_masks_arabic (hb_ot_map_t *map, hb_buffer_t *buffer)
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{
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@ -309,6 +309,13 @@ _hb_ot_shape_complex_collect_features_indic (hb_ot_map_builder_t *map, const hb_
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}
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bool
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_hb_ot_shape_complex_prefer_decomposed_indic (void)
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{
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/* We want split matras decomposed by the common shaping logic. */
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return TRUE;
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}
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static void
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found_syllable (hb_ot_map_t *map, hb_buffer_t *buffer,
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unsigned int start, unsigned int end)
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@ -42,6 +42,12 @@ _hb_ot_shape_complex_collect_features_default (hb_ot_map_builder_t *map, const h
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{
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}
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bool
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_hb_ot_shape_complex_prefer_decomposed_default (void)
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{
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return FALSE;
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}
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void
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_hb_ot_shape_complex_setup_masks_default (hb_ot_map_t *map, hb_buffer_t *buffer)
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{
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@ -147,6 +147,33 @@ hb_ot_shape_complex_collect_features (hb_ot_complex_shaper_t shaper,
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}
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/*
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* prefer_decomposed()
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*
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* Called during shape_execute().
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*
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* Shapers should return TRUE if it prefers decomposed (NFD) input rather than precomposed (NFC).
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*/
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typedef bool hb_ot_shape_complex_prefer_decomposed_func_t (void);
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#define HB_COMPLEX_SHAPER_IMPLEMENT(name) \
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HB_INTERNAL hb_ot_shape_complex_prefer_decomposed_func_t _hb_ot_shape_complex_prefer_decomposed_##name;
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HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
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#undef HB_COMPLEX_SHAPER_IMPLEMENT
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static inline bool
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hb_ot_shape_complex_prefer_decomposed (hb_ot_complex_shaper_t shaper)
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{
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switch (shaper) {
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default:
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#define HB_COMPLEX_SHAPER_IMPLEMENT(name) \
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case hb_ot_complex_shaper_##name: return _hb_ot_shape_complex_prefer_decomposed_##name ();
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HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS
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#undef HB_COMPLEX_SHAPER_IMPLEMENT
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}
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}
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/* setup_masks()
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*
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* Called during shape_execute().
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