/* * Copyright © 2010,2011,2012 Google, Inc. * * This is part of HarfBuzz, a text shaping library. * * Permission is hereby granted, without written agreement and without * license or royalty fees, to use, copy, modify, and distribute this * software and its documentation for any purpose, provided that the * above copyright notice and the following two paragraphs appear in * all copies of this software. * * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. * * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * Google Author(s): Behdad Esfahbod */ #ifndef HB_OT_SHAPE_COMPLEX_PRIVATE_HH #define HB_OT_SHAPE_COMPLEX_PRIVATE_HH #include "hb-private.hh" #include "hb-ot-map-private.hh" #include "hb-ot-shape-normalize-private.hh" /* buffer var allocations, used during the entire shaping process */ #define unicode_props0() var1.u8[0] #define unicode_props1() var1.u8[1] /* buffer var allocations, used during the GSUB/GPOS processing */ #define props_cache() var1.u16[1] /* GSUB/GPOS glyph_props cache */ #define syllable() var2.u8[0] /* GSUB/GPOS shaping boundaries */ #define lig_props() var2.u8[1] /* GSUB/GPOS ligature tracking */ /* buffer var allocations, used by complex shapers */ #define complex_var_persistent_u8_0() var2.u8[2] #define complex_var_persistent_u8_1() var2.u8[3] #define complex_var_temporary_u8() var2.u8[0] #define HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS \ HB_COMPLEX_SHAPER_IMPLEMENT (default) /* should be first */ \ HB_COMPLEX_SHAPER_IMPLEMENT (arabic) \ HB_COMPLEX_SHAPER_IMPLEMENT (hangul) \ HB_COMPLEX_SHAPER_IMPLEMENT (indic) \ HB_COMPLEX_SHAPER_IMPLEMENT (thai) \ /* ^--- Add new shapers here */ enum hb_ot_complex_shaper_t { #define HB_COMPLEX_SHAPER_IMPLEMENT(name) hb_ot_complex_shaper_##name, HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS /* Just here to avoid enum trailing comma: */ hb_ot_complex_shaper_generic = hb_ot_complex_shaper_default #undef HB_COMPLEX_SHAPER_IMPLEMENT }; static inline hb_ot_complex_shaper_t hb_ot_shape_complex_categorize (const hb_segment_properties_t *props) { switch ((hb_tag_t) props->script) { default: return hb_ot_complex_shaper_default; /* Unicode-1.1 additions */ case HB_SCRIPT_ARABIC: case HB_SCRIPT_MONGOLIAN: case HB_SCRIPT_SYRIAC: /* Unicode-5.0 additions */ case HB_SCRIPT_NKO: /* Unicode-6.0 additions */ case HB_SCRIPT_MANDAIC: return hb_ot_complex_shaper_arabic; /* Unicode-1.1 additions */ case HB_SCRIPT_HANGUL: return hb_ot_complex_shaper_hangul; /* Unicode-1.1 additions */ case HB_SCRIPT_THAI: case HB_SCRIPT_LAO: return hb_ot_complex_shaper_thai; /* ^--- Add new shapers here */ #if 0 /* Note: * * These disabled scripts are listed in ucd/IndicSyllabicCategory.txt, but according * to Martin Hosken and Jonathan Kew do not require complex shaping. * * TODO We should automate figuring out which scripts do not need complex shaping * * TODO We currently keep data for these scripts in our indic table. Need to fix the * generator to not do that. */ /* Simple? */ /* Unicode-3.2 additions */ case HB_SCRIPT_BUHID: case HB_SCRIPT_HANUNOO: /* Unicode-5.1 additions */ case HB_SCRIPT_SAURASHTRA: /* Unicode-5.2 additions */ case HB_SCRIPT_MEETEI_MAYEK: /* Unicode-6.0 additions */ case HB_SCRIPT_BATAK: case HB_SCRIPT_BRAHMI: /* Simple */ /* Unicode-1.1 additions */ /* These have their own shaper now. */ case HB_SCRIPT_LAO: case HB_SCRIPT_THAI: /* Unicode-2.0 additions */ case HB_SCRIPT_TIBETAN: /* Unicode-3.2 additions */ case HB_SCRIPT_TAGALOG: case HB_SCRIPT_TAGBANWA: /* Unicode-4.0 additions */ case HB_SCRIPT_LIMBU: case HB_SCRIPT_TAI_LE: /* Unicode-4.1 additions */ case HB_SCRIPT_SYLOTI_NAGRI: /* Unicode-5.0 additions */ case HB_SCRIPT_PHAGS_PA: /* Unicode-5.1 additions */ case HB_SCRIPT_KAYAH_LI: /* Unicode-5.2 additions */ case HB_SCRIPT_TAI_VIET: /* May need Indic treatment in the future? */ /* Unicode-3.0 additions */ case HB_SCRIPT_MYANMAR: #endif /* Unicode-1.1 additions */ case HB_SCRIPT_BENGALI: case HB_SCRIPT_DEVANAGARI: case HB_SCRIPT_GUJARATI: case HB_SCRIPT_GURMUKHI: case HB_SCRIPT_KANNADA: case HB_SCRIPT_MALAYALAM: case HB_SCRIPT_ORIYA: case HB_SCRIPT_TAMIL: case HB_SCRIPT_TELUGU: /* Unicode-3.0 additions */ case HB_SCRIPT_KHMER: case HB_SCRIPT_SINHALA: /* Unicode-4.1 additions */ case HB_SCRIPT_BUGINESE: case HB_SCRIPT_KHAROSHTHI: case HB_SCRIPT_NEW_TAI_LUE: /* Unicode-5.0 additions */ case HB_SCRIPT_BALINESE: /* Unicode-5.1 additions */ case HB_SCRIPT_CHAM: case HB_SCRIPT_LEPCHA: case HB_SCRIPT_REJANG: case HB_SCRIPT_SUNDANESE: /* Unicode-5.2 additions */ case HB_SCRIPT_JAVANESE: case HB_SCRIPT_KAITHI: case HB_SCRIPT_TAI_THAM: /* Unicode-6.1 additions */ case HB_SCRIPT_CHAKMA: case HB_SCRIPT_SHARADA: case HB_SCRIPT_TAKRI: return hb_ot_complex_shaper_indic; } } /* * collect_features() * * Called during shape_plan(). * * Shapers should use map to add their features and callbacks. */ typedef void hb_ot_shape_complex_collect_features_func_t (hb_ot_map_builder_t *map, const hb_segment_properties_t *props); #define HB_COMPLEX_SHAPER_IMPLEMENT(name) \ HB_INTERNAL hb_ot_shape_complex_collect_features_func_t _hb_ot_shape_complex_collect_features_##name; HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS #undef HB_COMPLEX_SHAPER_IMPLEMENT static inline void hb_ot_shape_complex_collect_features (hb_ot_complex_shaper_t shaper, hb_ot_map_builder_t *map, const hb_segment_properties_t *props) { switch (shaper) { default: #define HB_COMPLEX_SHAPER_IMPLEMENT(name) \ case hb_ot_complex_shaper_##name: _hb_ot_shape_complex_collect_features_##name (map, props); return; HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS #undef HB_COMPLEX_SHAPER_IMPLEMENT } } /* * normalization_preference() * * Called during shape_execute(). * * Shapers should return true if it prefers decomposed (NFD) input rather than precomposed (NFC). */ typedef hb_ot_shape_normalization_mode_t hb_ot_shape_complex_normalization_preference_func_t (void); #define HB_COMPLEX_SHAPER_IMPLEMENT(name) \ HB_INTERNAL hb_ot_shape_complex_normalization_preference_func_t _hb_ot_shape_complex_normalization_preference_##name; HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS #undef HB_COMPLEX_SHAPER_IMPLEMENT static inline hb_ot_shape_normalization_mode_t hb_ot_shape_complex_normalization_preference (hb_ot_complex_shaper_t shaper) { switch (shaper) { default: #define HB_COMPLEX_SHAPER_IMPLEMENT(name) \ case hb_ot_complex_shaper_##name: return _hb_ot_shape_complex_normalization_preference_##name (); HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS #undef HB_COMPLEX_SHAPER_IMPLEMENT } } /* setup_masks() * * Called during shape_execute(). * * Shapers should use map to get feature masks and set on buffer. */ typedef void hb_ot_shape_complex_setup_masks_func_t (hb_ot_map_t *map, hb_buffer_t *buffer, hb_font_t *font); #define HB_COMPLEX_SHAPER_IMPLEMENT(name) \ HB_INTERNAL hb_ot_shape_complex_setup_masks_func_t _hb_ot_shape_complex_setup_masks_##name; HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS #undef HB_COMPLEX_SHAPER_IMPLEMENT static inline void hb_ot_shape_complex_setup_masks (hb_ot_complex_shaper_t shaper, hb_ot_map_t *map, hb_buffer_t *buffer, hb_font_t *font) { switch (shaper) { default: #define HB_COMPLEX_SHAPER_IMPLEMENT(name) \ case hb_ot_complex_shaper_##name: _hb_ot_shape_complex_setup_masks_##name (map, buffer, font); return; HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS #undef HB_COMPLEX_SHAPER_IMPLEMENT } } #endif /* HB_OT_SHAPE_COMPLEX_PRIVATE_HH */