kc3-lang/harfbuzz/src/hb-ot-shape-complex-indic-private.hh

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• Hash : 9e1f80ab
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  Date : 2013-02-12T15:28:21
  

  [SEA] Treat Consonant_Final like Consonant_Medial
  

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• src/hb-ot-shape-complex-indic-private.hh

• /*
   * Copyright © 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_INDIC_PRIVATE_HH
  #define HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH
  
  #include "hb-private.hh"
  
  
  #include "hb-ot-shape-complex-private.hh"
  #include "hb-ot-shape-private.hh" /* XXX Remove */
  
  
  #define INDIC_TABLE_ELEMENT_TYPE uint16_t
  
  /* Cateories used in the OpenType spec:
   * https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx
   */
  /* Note: This enum is duplicated in the -machine.rl source file.
   * Not sure how to avoid duplication. */
  enum indic_category_t {
    OT_X = 0,
    OT_C,
    OT_V,
    OT_N,
    OT_H,
    OT_ZWNJ,
    OT_ZWJ,
    OT_M,
    OT_SM,
    OT_VD,
    OT_A,
    OT_NBSP,
    OT_DOTTEDCIRCLE, /* Not in the spec, but special in Uniscribe. /Very very/ special! */
    OT_RS, /* Register Shifter, used in Khmer OT spec */
    OT_Coeng,
    OT_Repha,
    OT_Ra, /* Not explicitly listed in the OT spec, but used in the grammar. */
    OT_CM
  };
  
  /* Visual positions in a syllable from left to right. */
  enum indic_position_t {
    POS_START,
  
    POS_RA_TO_BECOME_REPH,
    POS_PRE_M,
    POS_PRE_C,
  
    POS_BASE_C,
    POS_AFTER_MAIN,
  
    POS_ABOVE_C,
  
    POS_BEFORE_SUB,
    POS_BELOW_C,
    POS_AFTER_SUB,
  
    POS_BEFORE_POST,
    POS_POST_C,
    POS_AFTER_POST,
  
    POS_FINAL_C,
    POS_SMVD,
  
    POS_END
  };
  
  /* Categories used in IndicSyllabicCategory.txt from UCD. */
  enum indic_syllabic_category_t {
    INDIC_SYLLABIC_CATEGORY_OTHER			= OT_X,
  
    INDIC_SYLLABIC_CATEGORY_AVAGRAHA		= OT_X,
    INDIC_SYLLABIC_CATEGORY_BINDU			= OT_SM,
    INDIC_SYLLABIC_CATEGORY_CONSONANT		= OT_C,
    INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD	= OT_C,
    INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL	= OT_CM,
    INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER	= OT_C,
    INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL	= OT_CM,
    INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER	= OT_NBSP,
    INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED	= OT_C,
    INDIC_SYLLABIC_CATEGORY_CONSONANT_REPHA	= OT_Repha,
    INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER	= OT_X,
    INDIC_SYLLABIC_CATEGORY_NUKTA			= OT_N,
    INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER	= OT_RS,
    INDIC_SYLLABIC_CATEGORY_TONE_LETTER		= OT_X,
    INDIC_SYLLABIC_CATEGORY_TONE_MARK		= OT_N,
    INDIC_SYLLABIC_CATEGORY_VIRAMA		= OT_H,
    INDIC_SYLLABIC_CATEGORY_VISARGA		= OT_SM,
    INDIC_SYLLABIC_CATEGORY_VOWEL			= OT_V,
    INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT	= OT_M,
    INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT	= OT_V
  };
  
  /* Categories used in IndicSMatraCategory.txt from UCD */
  enum indic_matra_category_t {
    INDIC_MATRA_CATEGORY_NOT_APPLICABLE		= POS_END,
  
    INDIC_MATRA_CATEGORY_LEFT			= POS_PRE_C,
    INDIC_MATRA_CATEGORY_TOP			= POS_ABOVE_C,
    INDIC_MATRA_CATEGORY_BOTTOM			= POS_BELOW_C,
    INDIC_MATRA_CATEGORY_RIGHT			= POS_POST_C,
  
    /* These should resolve to the position of the last part of the split sequence. */
    INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT		= INDIC_MATRA_CATEGORY_RIGHT,
    INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT		= INDIC_MATRA_CATEGORY_RIGHT,
    INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM		= INDIC_MATRA_CATEGORY_BOTTOM,
    INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT	= INDIC_MATRA_CATEGORY_RIGHT,
    INDIC_MATRA_CATEGORY_TOP_AND_LEFT		= INDIC_MATRA_CATEGORY_TOP,
    INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT	= INDIC_MATRA_CATEGORY_RIGHT,
    INDIC_MATRA_CATEGORY_TOP_AND_RIGHT		= INDIC_MATRA_CATEGORY_RIGHT,
  
    INDIC_MATRA_CATEGORY_INVISIBLE		= INDIC_MATRA_CATEGORY_NOT_APPLICABLE,
    INDIC_MATRA_CATEGORY_OVERSTRUCK		= POS_AFTER_MAIN,
    INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT	= POS_PRE_M
  };
  
  /* Note: We use ASSERT_STATIC_EXPR_ZERO() instead of ASSERT_STATIC_EXPR() and the comma operation
   * because gcc fails to optimize the latter and fills the table in at runtime. */
  #define INDIC_COMBINE_CATEGORIES(S,M) \
    (ASSERT_STATIC_EXPR_ZERO (M == INDIC_MATRA_CATEGORY_NOT_APPLICABLE || (S == INDIC_SYLLABIC_CATEGORY_VIRAMA || S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT)) + \
     ASSERT_STATIC_EXPR_ZERO (S < 255 && M < 255) + \
     ((M << 8) | S))
  
  HB_INTERNAL INDIC_TABLE_ELEMENT_TYPE
  hb_indic_get_categories (hb_codepoint_t u);
  
  #endif /* HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH */
  

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