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-/*
- * 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_HH
-#define HB_OT_SHAPE_COMPLEX_HH
-
-#include "hb.hh"
-
-#include "hb-ot-layout.hh"
-#include "hb-ot-shape.hh"
-#include "hb-ot-shape-normalize.hh"
-
-
-/* buffer var allocations, used by complex shapers */
-#define complex_var_u8_category() var2.u8[2]
-#define complex_var_u8_auxiliary() var2.u8[3]
-
-
-#define HB_OT_SHAPE_COMPLEX_MAX_COMBINING_MARKS 32
-
-enum hb_ot_shape_zero_width_marks_type_t {
- HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE,
- HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_EARLY,
- HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE
-};
-
-
-/* Master OT shaper list */
-#define HB_COMPLEX_SHAPERS_IMPLEMENT_SHAPERS \
- HB_COMPLEX_SHAPER_IMPLEMENT (arabic) \
- HB_COMPLEX_SHAPER_IMPLEMENT (default) \
- HB_COMPLEX_SHAPER_IMPLEMENT (dumber) \
- HB_COMPLEX_SHAPER_IMPLEMENT (hangul) \
- HB_COMPLEX_SHAPER_IMPLEMENT (hebrew) \
- HB_COMPLEX_SHAPER_IMPLEMENT (indic) \
- HB_COMPLEX_SHAPER_IMPLEMENT (khmer) \
- HB_COMPLEX_SHAPER_IMPLEMENT (myanmar) \
- HB_COMPLEX_SHAPER_IMPLEMENT (myanmar_zawgyi) \
- HB_COMPLEX_SHAPER_IMPLEMENT (thai) \
- HB_COMPLEX_SHAPER_IMPLEMENT (use) \
- /* ^--- Add new shapers here; keep sorted. */
-
-
-struct hb_ot_complex_shaper_t
-{
- /* collect_features()
- * Called during shape_plan().
- * Shapers should use plan->map to add their features and callbacks.
- * May be NULL.
- */
- 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.
- * May be NULL.
- */
- 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 nullptr 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 nullptr 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.
- * May be NULL.
- */
- void (*preprocess_text) (const hb_ot_shape_plan_t *plan,
- hb_buffer_t *buffer,
- hb_font_t *font);
-
- /* postprocess_glyphs()
- * Called during shape().
- * Shapers can use to modify glyphs after shaping ends.
- * May be NULL.
- */
- void (*postprocess_glyphs) (const hb_ot_shape_plan_t *plan,
- hb_buffer_t *buffer,
- hb_font_t *font);
-
-
- hb_ot_shape_normalization_mode_t normalization_preference;
-
- /* decompose()
- * Called during shape()'s normalization.
- * May be NULL.
- */
- bool (*decompose) (const hb_ot_shape_normalize_context_t *c,
- hb_codepoint_t ab,
- hb_codepoint_t *a,
- hb_codepoint_t *b);
-
- /* compose()
- * Called during shape()'s normalization.
- * May be NULL.
- */
- bool (*compose) (const hb_ot_shape_normalize_context_t *c,
- hb_codepoint_t a,
- hb_codepoint_t b,
- hb_codepoint_t *ab);
-
- /* setup_masks()
- * Called during shape().
- * Shapers should use map to get feature masks and set on buffer.
- * Shapers may NOT modify characters.
- * May be NULL.
- */
- void (*setup_masks) (const hb_ot_shape_plan_t *plan,
- hb_buffer_t *buffer,
- hb_font_t *font);
-
- /* gpos_tag()
- * If not HB_TAG_NONE, then must match found GPOS script tag for
- * GPOS to be applied. Otherwise, fallback positioning will be used.
- */
- hb_tag_t gpos_tag;
-
- /* reorder_marks()
- * Called during shape().
- * Shapers can use to modify ordering of combining marks.
- * May be NULL.
- */
- void (*reorder_marks) (const hb_ot_shape_plan_t *plan,
- hb_buffer_t *buffer,
- unsigned int start,
- unsigned int end);
-
- hb_ot_shape_zero_width_marks_type_t zero_width_marks;
-
- bool fallback_position;
-};
-
-#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_ot_shape_planner_t *planner)
-{
- switch ((hb_tag_t) planner->props.script)
- {
- default:
- return &_hb_ot_complex_shaper_default;
-
-
- /* Unicode-1.1 additions */
- case HB_SCRIPT_ARABIC:
-
- /* Unicode-3.0 additions */
- case HB_SCRIPT_SYRIAC:
-
- /* For Arabic script, use the Arabic shaper even if no OT script tag was found.
- * This is because we do fallback shaping for Arabic script (and not others).
- * But note that Arabic shaping is applicable only to horizontal layout; for
- * vertical text, just use the generic shaper instead. */
- if ((planner->map.chosen_script[0] != HB_OT_TAG_DEFAULT_SCRIPT ||
- planner->props.script == HB_SCRIPT_ARABIC) &&
- HB_DIRECTION_IS_HORIZONTAL(planner->props.direction))
- return &_hb_ot_complex_shaper_arabic;
- else
- return &_hb_ot_complex_shaper_default;
-
-
- /* Unicode-1.1 additions */
- case HB_SCRIPT_THAI:
- case HB_SCRIPT_LAO:
-
- return &_hb_ot_complex_shaper_thai;
-
-
- /* Unicode-1.1 additions */
- case HB_SCRIPT_HANGUL:
-
- return &_hb_ot_complex_shaper_hangul;
-
-
- /* Unicode-1.1 additions */
- case HB_SCRIPT_HEBREW:
-
- return &_hb_ot_complex_shaper_hebrew;
-
-
- /* 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_SINHALA:
-
- /* If the designer designed the font for the 'DFLT' script,
- * (or we ended up arbitrarily pick 'latn'), use the default shaper.
- * Otherwise, use the specific shaper.
- *
- * If it's indy3 tag, send to USE. */
- if (planner->map.chosen_script[0] == HB_TAG ('D','F','L','T') ||
- planner->map.chosen_script[0] == HB_TAG ('l','a','t','n'))
- return &_hb_ot_complex_shaper_default;
- else if ((planner->map.chosen_script[0] & 0x000000FF) == '3')
- return &_hb_ot_complex_shaper_use;
- else
- return &_hb_ot_complex_shaper_indic;
-
- case HB_SCRIPT_KHMER:
- return &_hb_ot_complex_shaper_khmer;
-
- case HB_SCRIPT_MYANMAR:
- /* If the designer designed the font for the 'DFLT' script,
- * (or we ended up arbitrarily pick 'latn'), use the default shaper.
- * Otherwise, use the specific shaper.
- *
- * If designer designed for 'mymr' tag, also send to default
- * shaper. That's tag used from before Myanmar shaping spec
- * was developed. The shaping spec uses 'mym2' tag. */
- if (planner->map.chosen_script[0] == HB_TAG ('D','F','L','T') ||
- planner->map.chosen_script[0] == HB_TAG ('l','a','t','n') ||
- planner->map.chosen_script[0] == HB_TAG ('m','y','m','r'))
- return &_hb_ot_complex_shaper_default;
- else
- return &_hb_ot_complex_shaper_myanmar;
-
-
-#define HB_SCRIPT_MYANMAR_ZAWGYI ((hb_script_t) HB_TAG ('Q','a','a','g'))
- case HB_SCRIPT_MYANMAR_ZAWGYI:
- /* https://github.com/harfbuzz/harfbuzz/issues/1162 */
-
- return &_hb_ot_complex_shaper_myanmar_zawgyi;
-
-
- /* Unicode-2.0 additions */
- case HB_SCRIPT_TIBETAN:
-
- /* Unicode-3.0 additions */
- case HB_SCRIPT_MONGOLIAN:
- //case HB_SCRIPT_SINHALA:
-
- /* Unicode-3.2 additions */
- case HB_SCRIPT_BUHID:
- case HB_SCRIPT_HANUNOO:
- 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_BUGINESE:
- case HB_SCRIPT_KHAROSHTHI:
- case HB_SCRIPT_SYLOTI_NAGRI:
- case HB_SCRIPT_TIFINAGH:
-
- /* Unicode-5.0 additions */
- case HB_SCRIPT_BALINESE:
- case HB_SCRIPT_NKO:
- case HB_SCRIPT_PHAGS_PA:
-
- /* Unicode-5.1 additions */
- case HB_SCRIPT_CHAM:
- case HB_SCRIPT_KAYAH_LI:
- case HB_SCRIPT_LEPCHA:
- case HB_SCRIPT_REJANG:
- case HB_SCRIPT_SAURASHTRA:
- case HB_SCRIPT_SUNDANESE:
-
- /* Unicode-5.2 additions */
- case HB_SCRIPT_EGYPTIAN_HIEROGLYPHS:
- case HB_SCRIPT_JAVANESE:
- case HB_SCRIPT_KAITHI:
- case HB_SCRIPT_MEETEI_MAYEK:
- case HB_SCRIPT_TAI_THAM:
- case HB_SCRIPT_TAI_VIET:
-
- /* Unicode-6.0 additions */
- case HB_SCRIPT_BATAK:
- case HB_SCRIPT_BRAHMI:
- case HB_SCRIPT_MANDAIC:
-
- /* Unicode-6.1 additions */
- case HB_SCRIPT_CHAKMA:
- case HB_SCRIPT_MIAO:
- case HB_SCRIPT_SHARADA:
- case HB_SCRIPT_TAKRI:
-
- /* Unicode-7.0 additions */
- case HB_SCRIPT_DUPLOYAN:
- case HB_SCRIPT_GRANTHA:
- case HB_SCRIPT_KHOJKI:
- case HB_SCRIPT_KHUDAWADI:
- case HB_SCRIPT_MAHAJANI:
- case HB_SCRIPT_MANICHAEAN:
- case HB_SCRIPT_MODI:
- case HB_SCRIPT_PAHAWH_HMONG:
- case HB_SCRIPT_PSALTER_PAHLAVI:
- case HB_SCRIPT_SIDDHAM:
- case HB_SCRIPT_TIRHUTA:
-
- /* Unicode-8.0 additions */
- case HB_SCRIPT_AHOM:
- case HB_SCRIPT_MULTANI:
-
- /* Unicode-9.0 additions */
- case HB_SCRIPT_ADLAM:
- case HB_SCRIPT_BHAIKSUKI:
- case HB_SCRIPT_MARCHEN:
- case HB_SCRIPT_NEWA:
-
- /* Unicode-10.0 additions */
- case HB_SCRIPT_MASARAM_GONDI:
- case HB_SCRIPT_SOYOMBO:
- case HB_SCRIPT_ZANABAZAR_SQUARE:
-
- /* Unicode-11.0 additions */
- case HB_SCRIPT_DOGRA:
- case HB_SCRIPT_GUNJALA_GONDI:
- case HB_SCRIPT_HANIFI_ROHINGYA:
- case HB_SCRIPT_MAKASAR:
- case HB_SCRIPT_MEDEFAIDRIN:
- case HB_SCRIPT_OLD_SOGDIAN:
- case HB_SCRIPT_SOGDIAN:
-
- /* Unicode-12.0 additions */
- case HB_SCRIPT_ELYMAIC:
- case HB_SCRIPT_NANDINAGARI:
- case HB_SCRIPT_NYIAKENG_PUACHUE_HMONG:
- case HB_SCRIPT_WANCHO:
-
- /* Unicode-13.0 additions */
- case HB_SCRIPT_CHORASMIAN:
- case HB_SCRIPT_DIVES_AKURU:
- case HB_SCRIPT_KHITAN_SMALL_SCRIPT:
- case HB_SCRIPT_YEZIDI:
-
- /* Unicode-14.0 additions */
- case HB_SCRIPT_CYPRO_MINOAN:
- case HB_SCRIPT_OLD_UYGHUR:
- case HB_SCRIPT_TANGSA:
- case HB_SCRIPT_TOTO:
- case HB_SCRIPT_VITHKUQI:
-
- /* If the designer designed the font for the 'DFLT' script,
- * (or we ended up arbitrarily pick 'latn'), use the default shaper.
- * Otherwise, use the specific shaper.
- * Note that for some simple scripts, there may not be *any*
- * GSUB/GPOS needed, so there may be no scripts found! */
- if (planner->map.chosen_script[0] == HB_TAG ('D','F','L','T') ||
- planner->map.chosen_script[0] == HB_TAG ('l','a','t','n'))
- return &_hb_ot_complex_shaper_default;
- else
- return &_hb_ot_complex_shaper_use;
- }
-}
-
-
-#endif /* HB_OT_SHAPE_COMPLEX_HH */
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