src/hb-ot-shape-complex-private.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_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]


 enum hb_ot_shape_zero_width_marks_type_t {
   HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE,
   HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_UNICODE,
   HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF
 };


 /* 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 (myanmar) \
   HB_COMPLEX_SHAPER_IMPLEMENT (sea) \
   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.
    * 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 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.
    * May be NULL.
    */
   void (*preprocess_text) (const hb_ot_shape_plan_t *plan,
 			   hb_buffer_t              *buffer,
 			   hb_font_t                *font);


   /* normalization_preference()
    * Called during shape().
    * May be NULL.
    */
   hb_ot_shape_normalization_mode_t
   (*normalization_preference) (const hb_segment_properties_t *props);

   /* 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);

   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:
     case HB_SCRIPT_MONGOLIAN:
     case HB_SCRIPT_SYRIAC:

     /* Unicode-5.0 additions */
     case HB_SCRIPT_NKO:
     case HB_SCRIPT_PHAGS_PA:

     /* Unicode-6.0 additions */
     case HB_SCRIPT_MANDAIC:

       /* 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). */
       if (planner->map.chosen_script[0] != HB_OT_TAG_DEFAULT_SCRIPT ||
 	  planner->props.script == HB_SCRIPT_ARABIC)
 	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;


 #if 0
     /* Note:
      * Currently we don't have a separate Hangul shaper.  The default shaper handles
      * Hangul by enabling jamo features.  We may want to implement a separate shaper
      * in the future.  See this thread for details of what such a shaper would do:
      *
      *   http://lists.freedesktop.org/archives/harfbuzz/2013-April/003070.html
      */
     /* Unicode-1.1 additions */
     case HB_SCRIPT_HANGUL:

       return &_hb_ot_complex_shaper_hangul;
 #endif


     /* ^--- 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-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_KHAROSHTHI:
     case HB_SCRIPT_SYLOTI_NAGRI:

     /* Unicode-5.1 additions */
     case HB_SCRIPT_KAYAH_LI:

     /* Unicode-5.2 additions */
     case HB_SCRIPT_TAI_VIET:


 #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_SINHALA:

     /* Unicode-4.1 additions */
     case HB_SCRIPT_BUGINESE:

     /* Unicode-5.0 additions */
     case HB_SCRIPT_BALINESE:

     /* Unicode-5.1 additions */
     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_MEETEI_MAYEK:

     /* Unicode-6.0 additions */

     /* Unicode-6.1 additions */
     case HB_SCRIPT_CHAKMA:
     case HB_SCRIPT_SHARADA:
     case HB_SCRIPT_TAKRI:

       /* If the designer designed the font for the 'DFLT' script,
        * use the default shaper.  Otherwise, use the Indic 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'))
 	return &_hb_ot_complex_shaper_default;
       else
 	return &_hb_ot_complex_shaper_indic;

     case HB_SCRIPT_KHMER:
       /* A number of Khmer fonts in the wild don't have a 'pref' feature,
        * and as such won't shape properly via the Indic shaper;
        * however, they typically have 'liga' / 'clig' features that implement
        * the necessary "reordering" by means of ligature substitutions.
        * So we send such pref-less fonts through the generic shaper instead. */
       if (planner->map.found_script[0] &&
 	  hb_ot_layout_language_find_feature (planner->face, HB_OT_TAG_GSUB,
 					      planner->map.script_index[0],
 					      planner->map.language_index[0],
 					      HB_TAG ('p','r','e','f'),
 					      NULL))
 	return &_hb_ot_complex_shaper_indic;
       else
 	return &_hb_ot_complex_shaper_default;

     case HB_SCRIPT_MYANMAR:
       /* For Myanmar, we only want to use the Myanmar shaper if the "new" script
        * tag is found.  For "old" script tag we want to use the default shaper. */
       if (planner->map.chosen_script[0] == HB_TAG ('m','y','m','2'))
 	return &_hb_ot_complex_shaper_myanmar;
       else
 	return &_hb_ot_complex_shaper_default;

     /* Unicode-4.1 additions */
     case HB_SCRIPT_NEW_TAI_LUE:

     /* Unicode-5.1 additions */
     case HB_SCRIPT_CHAM:

     /* Unicode-5.2 additions */
     case HB_SCRIPT_TAI_THAM:

       /* If the designer designed the font for the 'DFLT' script,
        * use the default shaper.  Otherwise, use the Indic 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'))
 	return &_hb_ot_complex_shaper_default;
       else
 	return &_hb_ot_complex_shaper_sea;
   }
 }


 #endif /* HB_OT_SHAPE_COMPLEX_PRIVATE_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_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]


	enum hb_ot_shape_zero_width_marks_type_t {
	HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE,
	HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_UNICODE,
	HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF
	};


	/* 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 (myanmar) \
	HB_COMPLEX_SHAPER_IMPLEMENT (sea) \
	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.
	* 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 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.
	* May be NULL.
	*/
	void (preprocess_text) (const hb_ot_shape_plan_t plan,
	hb_buffer_t *buffer,
	hb_font_t *font);


	/* normalization_preference()
	* Called during shape().
	* May be NULL.
	*/
	hb_ot_shape_normalization_mode_t
	(normalization_preference) (const hb_segment_properties_t props);

	/* 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);

	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:
	case HB_SCRIPT_MONGOLIAN:
	case HB_SCRIPT_SYRIAC:

	/* Unicode-5.0 additions */
	case HB_SCRIPT_NKO:
	case HB_SCRIPT_PHAGS_PA:

	/* Unicode-6.0 additions */
	case HB_SCRIPT_MANDAIC:

	/* 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). */
	if (planner->map.chosen_script[0] != HB_OT_TAG_DEFAULT_SCRIPT \|\|
	planner->props.script == HB_SCRIPT_ARABIC)
	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;


	#if 0
	/* Note:
	* Currently we don't have a separate Hangul shaper. The default shaper handles
	* Hangul by enabling jamo features. We may want to implement a separate shaper
	* in the future. See this thread for details of what such a shaper would do:
	*
	* http://lists.freedesktop.org/archives/harfbuzz/2013-April/003070.html
	*/
	/* Unicode-1.1 additions */
	case HB_SCRIPT_HANGUL:

	return &_hb_ot_complex_shaper_hangul;
	#endif


	/* ^--- 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-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_KHAROSHTHI:
	case HB_SCRIPT_SYLOTI_NAGRI:

	/* Unicode-5.1 additions */
	case HB_SCRIPT_KAYAH_LI:

	/* Unicode-5.2 additions */
	case HB_SCRIPT_TAI_VIET:


	#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_SINHALA:

	/* Unicode-4.1 additions */
	case HB_SCRIPT_BUGINESE:

	/* Unicode-5.0 additions */
	case HB_SCRIPT_BALINESE:

	/* Unicode-5.1 additions */
	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_MEETEI_MAYEK:

	/* Unicode-6.0 additions */

	/* Unicode-6.1 additions */
	case HB_SCRIPT_CHAKMA:
	case HB_SCRIPT_SHARADA:
	case HB_SCRIPT_TAKRI:

	/* If the designer designed the font for the 'DFLT' script,
	* use the default shaper. Otherwise, use the Indic 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'))
	return &_hb_ot_complex_shaper_default;
	else
	return &_hb_ot_complex_shaper_indic;

	case HB_SCRIPT_KHMER:
	/* A number of Khmer fonts in the wild don't have a 'pref' feature,
	* and as such won't shape properly via the Indic shaper;
	* however, they typically have 'liga' / 'clig' features that implement
	* the necessary "reordering" by means of ligature substitutions.
	* So we send such pref-less fonts through the generic shaper instead. */
	if (planner->map.found_script[0] &&
	hb_ot_layout_language_find_feature (planner->face, HB_OT_TAG_GSUB,
	planner->map.script_index[0],
	planner->map.language_index[0],
	HB_TAG ('p','r','e','f'),
	NULL))
	return &_hb_ot_complex_shaper_indic;
	else
	return &_hb_ot_complex_shaper_default;

	case HB_SCRIPT_MYANMAR:
	/* For Myanmar, we only want to use the Myanmar shaper if the "new" script
	* tag is found. For "old" script tag we want to use the default shaper. */
	if (planner->map.chosen_script[0] == HB_TAG ('m','y','m','2'))
	return &_hb_ot_complex_shaper_myanmar;
	else
	return &_hb_ot_complex_shaper_default;

	/* Unicode-4.1 additions */
	case HB_SCRIPT_NEW_TAI_LUE:

	/* Unicode-5.1 additions */
	case HB_SCRIPT_CHAM:

	/* Unicode-5.2 additions */
	case HB_SCRIPT_TAI_THAM:

	/* If the designer designed the font for the 'DFLT' script,
	* use the default shaper. Otherwise, use the Indic 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'))
	return &_hb_ot_complex_shaper_default;
	else
	return &_hb_ot_complex_shaper_sea;
	}
	}


	#endif /* HB_OT_SHAPE_COMPLEX_PRIVATE_HH */