Roll HarfBuzz to 1.4.1

third_party/harfbuzz-ng/src/hb-ot-shape-complex-indic.cc

 /*
  * Copyright © 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.
@@ skipping 1695 matching lines @@
 
 static bool
 decompose_indic (const hb_ot_shape_normalize_context_t *c,
                  hb_codepoint_t  ab,
                  hb_codepoint_t *a,
                  hb_codepoint_t *b)
 {
   switch (ab)
   {
     /* Don't decompose these. */
-    case 0x0931u  : return false;
-    case 0x0B94u  : return false;
+    case 0x0931u  : return false; /* DEVANAGARI LETTER RRA */
+    case 0x0B94u  : return false; /* TAMIL LETTER AU */
 
 
     /*
      * Decompose split matras that don't have Unicode decompositions.
      */
 
-    case 0x0F77u  : *a = 0x0FB2u; *b= 0x0F81u; return true;
-    case 0x0F79u  : *a = 0x0FB3u; *b= 0x0F81u; return true;
+    /* Khmer */
     case 0x17BEu  : *a = 0x17C1u; *b= 0x17BEu; return true;
     case 0x17BFu  : *a = 0x17C1u; *b= 0x17BFu; return true;
     case 0x17C0u  : *a = 0x17C1u; *b= 0x17C0u; return true;
     case 0x17C4u  : *a = 0x17C1u; *b= 0x17C4u; return true;
     case 0x17C5u  : *a = 0x17C1u; *b= 0x17C5u; return true;
-    case 0x1925u  : *a = 0x1920u; *b= 0x1923u; return true;
-    case 0x1926u  : *a = 0x1920u; *b= 0x1924u; return true;
-    case 0x1B3Cu  : *a = 0x1B42u; *b= 0x1B3Cu; return true;
-    case 0x1112Eu  : *a = 0x11127u; *b= 0x11131u; return true;
-    case 0x1112Fu  : *a = 0x11127u; *b= 0x11132u; return true;
+
 #if 0
+    /* Gujarati */
     /* This one has no decomposition in Unicode, but needs no decomposition either. */
     /* case 0x0AC9u  : return false; */
+
+    /* Oriya */
     case 0x0B57u  : *a = no decomp, -> RIGHT; return true;
-    case 0x1C29u  : *a = no decomp, -> LEFT; return true;
-    case 0xA9C0u  : *a = no decomp, -> RIGHT; return true;
-    case 0x111BuF  : *a = no decomp, -> ABOVE; return true;
 #endif
   }
 
   if ((ab == 0x0DDAu || hb_in_range (ab, 0x0DDCu, 0x0DDEu)))
   {
     /*
      * Sinhala split matras...  Let the fun begin.
      *
      * These four characters have Unicode decompositions.  However, Uniscribe
      * decomposes them "Khmer-style", that is, it uses the character itself to
@@ skipping 59 matching lines @@
   collect_features_indic,
   override_features_indic,
   data_create_indic,
   data_destroy_indic,
   NULL, /* preprocess_text */
   NULL, /* postprocess_glyphs */
   HB_OT_SHAPE_NORMALIZATION_MODE_COMPOSED_DIACRITICS_NO_SHORT_CIRCUIT,
   decompose_indic,
   compose_indic,
   setup_masks_indic,
+  NULL, /* disable_otl */
   HB_OT_SHAPE_ZERO_WIDTH_MARKS_NONE,
   false, /* fallback_position */
 };