src/hb-ot-shape-complex.hh - third_party/harfbuzz - Git at Google

 /*
  * 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 */
	/*
	* 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 */