kc3-lang/harfbuzz/src/hb-ot-shape-complex-hebrew.cc

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• Hash : 7aad5365
  Author :
  Date : 2019-06-26T13:21:03
  

  [config] Add HB_NO_OT_SHAPE / HB_NO_OT
  
  Part of https://github.com/harfbuzz/harfbuzz/issues/1652
  

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• src/hb-ot-shape-complex-hebrew.cc

• /*
   * Copyright © 2010,2012  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
   */
  
  #include "hb.hh"
  
  #ifndef HB_NO_OT_SHAPE
  
  #include "hb-ot-shape-complex.hh"
  
  
  static bool
  compose_hebrew (const hb_ot_shape_normalize_context_t *c,
  		hb_codepoint_t  a,
  		hb_codepoint_t  b,
  		hb_codepoint_t *ab)
  {
    /* Hebrew presentation-form shaping.
     * https://bugzilla.mozilla.org/show_bug.cgi?id=728866
     * Hebrew presentation forms with dagesh, for characters U+05D0..05EA;
     * Note that some letters do not have a dagesh presForm encoded.
     */
    static const hb_codepoint_t sDageshForms[0x05EAu - 0x05D0u + 1] = {
      0xFB30u, /* ALEF */
      0xFB31u, /* BET */
      0xFB32u, /* GIMEL */
      0xFB33u, /* DALET */
      0xFB34u, /* HE */
      0xFB35u, /* VAV */
      0xFB36u, /* ZAYIN */
      0x0000u, /* HET */
      0xFB38u, /* TET */
      0xFB39u, /* YOD */
      0xFB3Au, /* FINAL KAF */
      0xFB3Bu, /* KAF */
      0xFB3Cu, /* LAMED */
      0x0000u, /* FINAL MEM */
      0xFB3Eu, /* MEM */
      0x0000u, /* FINAL NUN */
      0xFB40u, /* NUN */
      0xFB41u, /* SAMEKH */
      0x0000u, /* AYIN */
      0xFB43u, /* FINAL PE */
      0xFB44u, /* PE */
      0x0000u, /* FINAL TSADI */
      0xFB46u, /* TSADI */
      0xFB47u, /* QOF */
      0xFB48u, /* RESH */
      0xFB49u, /* SHIN */
      0xFB4Au /* TAV */
    };
  
    bool found = (bool) c->unicode->compose (a, b, ab);
  
  #ifdef HB_NO_OT_SHAPE_COMPLEX_HEBREW_FALLBACK
    return found;
  #endif
  
    if (!found && !c->plan->has_gpos_mark)
    {
        /* Special-case Hebrew presentation forms that are excluded from
         * standard normalization, but wanted for old fonts. */
        switch (b) {
        case 0x05B4u: /* HIRIQ */
  	  if (a == 0x05D9u) { /* YOD */
  	      *ab = 0xFB1Du;
  	      found = true;
  	  }
  	  break;
        case 0x05B7u: /* patah */
  	  if (a == 0x05F2u) { /* YIDDISH YOD YOD */
  	      *ab = 0xFB1Fu;
  	      found = true;
  	  } else if (a == 0x05D0u) { /* ALEF */
  	      *ab = 0xFB2Eu;
  	      found = true;
  	  }
  	  break;
        case 0x05B8u: /* QAMATS */
  	  if (a == 0x05D0u) { /* ALEF */
  	      *ab = 0xFB2Fu;
  	      found = true;
  	  }
  	  break;
        case 0x05B9u: /* HOLAM */
  	  if (a == 0x05D5u) { /* VAV */
  	      *ab = 0xFB4Bu;
  	      found = true;
  	  }
  	  break;
        case 0x05BCu: /* DAGESH */
  	  if (a >= 0x05D0u && a <= 0x05EAu) {
  	      *ab = sDageshForms[a - 0x05D0u];
  	      found = (*ab != 0);
  	  } else if (a == 0xFB2Au) { /* SHIN WITH SHIN DOT */
  	      *ab = 0xFB2Cu;
  	      found = true;
  	  } else if (a == 0xFB2Bu) { /* SHIN WITH SIN DOT */
  	      *ab = 0xFB2Du;
  	      found = true;
  	  }
  	  break;
        case 0x05BFu: /* RAFE */
  	  switch (a) {
  	  case 0x05D1u: /* BET */
  	      *ab = 0xFB4Cu;
  	      found = true;
  	      break;
  	  case 0x05DBu: /* KAF */
  	      *ab = 0xFB4Du;
  	      found = true;
  	      break;
  	  case 0x05E4u: /* PE */
  	      *ab = 0xFB4Eu;
  	      found = true;
  	      break;
  	  }
  	  break;
        case 0x05C1u: /* SHIN DOT */
  	  if (a == 0x05E9u) { /* SHIN */
  	      *ab = 0xFB2Au;
  	      found = true;
  	  } else if (a == 0xFB49u) { /* SHIN WITH DAGESH */
  	      *ab = 0xFB2Cu;
  	      found = true;
  	  }
  	  break;
        case 0x05C2u: /* SIN DOT */
  	  if (a == 0x05E9u) { /* SHIN */
  	      *ab = 0xFB2Bu;
  	      found = true;
  	  } else if (a == 0xFB49u) { /* SHIN WITH DAGESH */
  	      *ab = 0xFB2Du;
  	      found = true;
  	  }
  	  break;
        }
    }
  
    return found;
  }
  
  
  const hb_ot_complex_shaper_t _hb_ot_complex_shaper_hebrew =
  {
    nullptr, /* collect_features */
    nullptr, /* override_features */
    nullptr, /* data_create */
    nullptr, /* data_destroy */
    nullptr, /* preprocess_text */
    nullptr, /* postprocess_glyphs */
    HB_OT_SHAPE_NORMALIZATION_MODE_DEFAULT,
    nullptr, /* decompose */
    compose_hebrew,
    nullptr, /* setup_masks */
    HB_TAG ('h','e','b','r'), /* gpos_tag. https://github.com/harfbuzz/harfbuzz/issues/347#issuecomment-267838368 */
    nullptr, /* reorder_marks */
    HB_OT_SHAPE_ZERO_WIDTH_MARKS_BY_GDEF_LATE,
    true, /* fallback_position */
  };
  
  
  #endif
  

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