/* * 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-shape-private.hh" #include "hb-ot-shape-normalize-private.hh" /* buffer var allocations, used by complex shapers */ #define complex_var_u8_0() var2.u8[2] #define complex_var_u8_1() var2.u8[3] /* Master OT shaper list */ #define HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS \ HB_COMPLEX_SHAPER_IMPLEMENT (default) /* should be first */ \ HB_COMPLEX_SHAPER_IMPLEMENT (arabic) \ HB_COMPLEX_SHAPER_IMPLEMENT (indic) \ HB_COMPLEX_SHAPER_IMPLEMENT (thai) \ /* ^--- Add new shapers here */ struct hb_ot_complex_shaper_t { char name[8]; /* collect_features() * Called during shape_plan(). * Shapers should use plan->map to add their features and callbacks. */ void (*collect_features) (hb_ot_shape_planner_t *plan); /* override_features() * Called during shape_plan(). * Shapers should use plan->map to override features and add callbacks after * common features are added. */ void (*override_features) (hb_ot_shape_planner_t *plan); /* data_create() * Called at the end of shape_plan(). * Whatever shapers return will be accessible through plan->data later. * If NULL is returned, means a plan failure. */ void *(*data_create) (const hb_ot_shape_plan_t *plan); /* data_destroy() * Called when the shape_plan is being destroyed. * plan->data is passed here for destruction. * If NULL is returned, means a plan failure. * May be NULL. */ void (*data_destroy) (void *data); /* preprocess_text() * Called during shape(). * Shapers can use to modify text before shaping starts. */ void (*preprocess_text) (const hb_ot_shape_plan_t *plan, hb_buffer_t *buffer, hb_font_t *font); /* normalization_preference() * Called during shape(). */ hb_ot_shape_normalization_mode_t (*normalization_preference) (const hb_ot_shape_plan_t *plan); /* setup_masks() * Called during shape(). * Shapers should use map to get feature masks and set on buffer. * Shapers may NOT modify characters. */ void (*setup_masks) (const hb_ot_shape_plan_t *plan, hb_buffer_t *buffer, hb_font_t *font); bool zero_width_attached_marks; }; #define HB_COMPLEX_SHAPER_IMPLEMENT(name) extern HB_INTERNAL const hb_ot_complex_shaper_t _hb_ot_complex_shaper_##name; HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS #undef HB_COMPLEX_SHAPER_IMPLEMENT static inline const 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_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; } } #endif /* HB_OT_SHAPE_COMPLEX_PRIVATE_HH */