/src/mozilla-central/gfx/harfbuzz/src/hb-ot-shape-complex-indic.hh

Source (jump to first uncovered line)
/*
 * 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_HH
#define HB_OT_SHAPE_COMPLEX_INDIC_HH

#include "hb.hh"


#include "hb-ot-shape-complex.hh"
#include "hb-ot-shape.hh" /* XXX Remove */


/* buffer var allocations */
#define indic_category() complex_var_u8_0() /* indic_category_t */
#define indic_position() complex_var_u8_1() /* indic_position_t */


#define INDIC_TABLE_ELEMENT_TYPE uint16_t

/* Cateories used in the OpenType spec:
 * https://docs.microsoft.com/en-us/typography/script-development/devanagari
 */
/* 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 = 1,
  OT_V = 2,
  OT_N = 3,
  OT_H = 4,
  OT_ZWNJ = 5,
  OT_ZWJ = 6,
  OT_M = 7,
  OT_SM = 8,
  /* OT_VD = 9, UNUSED; we use OT_A instead. */
  OT_A = 10,
  OT_PLACEHOLDER = 11,
  OT_DOTTEDCIRCLE = 12,
  OT_RS = 13, /* Register Shifter, used in Khmer OT spec. */
  OT_Coeng = 14, /* Khmer-style Virama. */
  OT_Repha = 15, /* Atomically-encoded logical or visual repha. */
  OT_Ra = 16,
  OT_CM = 17,  /* Consonant-Medial. */
  OT_Symbol = 18, /* Avagraha, etc that take marks (SM,A,VD). */
  OT_CS = 19
};

#define MEDIAL_FLAGS (FLAG (OT_CM))

/* Note:
 *
 * We treat Vowels and placeholders as if they were consonants.  This is safe because Vowels
 * cannot happen in a consonant syllable.  The plus side however is, we can call the
 * consonant syllable logic from the vowel syllable function and get it all right! */
#define CONSONANT_FLAGS (FLAG (OT_C) | FLAG (OT_CS) | FLAG (OT_Ra) | MEDIAL_FLAGS | FLAG (OT_V) | FLAG (OT_PLACEHOLDER) | FLAG (OT_DOTTEDCIRCLE))
#define JOINER_FLAGS (FLAG (OT_ZWJ) | FLAG (OT_ZWNJ))


/* Visual positions in a syllable from left to right. */
enum indic_position_t {
  POS_START = 0,

  POS_RA_TO_BECOME_REPH = 1,
  POS_PRE_M = 2,
  POS_PRE_C = 3,

  POS_BASE_C = 4,
  POS_AFTER_MAIN = 5,

  POS_ABOVE_C = 6,

  POS_BEFORE_SUB = 7,
  POS_BELOW_C = 8,
  POS_AFTER_SUB = 9,

  POS_BEFORE_POST = 10,
  POS_POST_C = 11,
  POS_AFTER_POST = 12,

  POS_FINAL_C = 13,
  POS_SMVD = 14,

  POS_END = 15
};

/* Categories used in IndicSyllabicCategory.txt from UCD. */
enum indic_syllabic_category_t {
  INDIC_SYLLABIC_CATEGORY_OTHER       = OT_X,

  INDIC_SYLLABIC_CATEGORY_AVAGRAHA      = OT_Symbol,
  INDIC_SYLLABIC_CATEGORY_BINDU       = OT_SM,
  INDIC_SYLLABIC_CATEGORY_BRAHMI_JOINING_NUMBER   = OT_PLACEHOLDER, /* Don't care. */
  INDIC_SYLLABIC_CATEGORY_CANTILLATION_MARK   = OT_A,
  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_KILLER    = OT_M, /* U+17CD only. */
  INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL    = OT_CM,
  INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER   = OT_PLACEHOLDER,
  INDIC_SYLLABIC_CATEGORY_CONSONANT_PRECEDING_REPHA = OT_Repha,
  INDIC_SYLLABIC_CATEGORY_CONSONANT_PREFIXED    = OT_X, /* Don't care. */
  INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED   = OT_CM,
  INDIC_SYLLABIC_CATEGORY_CONSONANT_SUCCEEDING_REPHA  = OT_N,
  INDIC_SYLLABIC_CATEGORY_CONSONANT_WITH_STACKER  = OT_CS,
  INDIC_SYLLABIC_CATEGORY_GEMINATION_MARK   = OT_SM, /* https://github.com/harfbuzz/harfbuzz/issues/552 */
  INDIC_SYLLABIC_CATEGORY_INVISIBLE_STACKER   = OT_Coeng,
  INDIC_SYLLABIC_CATEGORY_JOINER      = OT_ZWJ,
  INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER    = OT_X,
  INDIC_SYLLABIC_CATEGORY_NON_JOINER      = OT_ZWNJ,
  INDIC_SYLLABIC_CATEGORY_NUKTA       = OT_N,
  INDIC_SYLLABIC_CATEGORY_NUMBER      = OT_PLACEHOLDER,
  INDIC_SYLLABIC_CATEGORY_NUMBER_JOINER     = OT_PLACEHOLDER, /* Don't care. */
  INDIC_SYLLABIC_CATEGORY_PURE_KILLER     = OT_M, /* Is like a vowel matra. */
  INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER    = OT_RS,
  INDIC_SYLLABIC_CATEGORY_SYLLABLE_MODIFIER   = OT_SM,
  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_OVERSTRUCK     = POS_AFTER_MAIN,
  INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT    = POS_PRE_M
};

#define INDIC_COMBINE_CATEGORIES(S,M) \
  ( \
    ASSERT_STATIC_EXPR_ZERO (S < 255 && M < 255) + \
    ( S | \
     ( \
      ( \
       S == INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL || \
       S == INDIC_SYLLABIC_CATEGORY_GEMINATION_MARK || \
       S == INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER || \
       S == INDIC_SYLLABIC_CATEGORY_CONSONANT_SUCCEEDING_REPHA || \
       S == INDIC_SYLLABIC_CATEGORY_VIRAMA || \
       S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT || \
       false \
       ? M : INDIC_MATRA_CATEGORY_NOT_APPLICABLE \
      ) << 8 \
     ) \
    ) \
   )

HB_INTERNAL INDIC_TABLE_ELEMENT_TYPE
hb_indic_get_categories (hb_codepoint_t u);


static inline bool
is_one_of (const hb_glyph_info_t &info, unsigned int flags)
{
  /* If it ligated, all bets are off. */
  if (_hb_glyph_info_ligated (&info)) return false;
  return !!(FLAG_UNSAFE (info.indic_category()) & flags);
}

static inline bool
is_joiner (const hb_glyph_info_t &info)
{
  return is_one_of (info, JOINER_FLAGS);
}

static inline bool
is_consonant (const hb_glyph_info_t &info)
{
  return is_one_of (info, CONSONANT_FLAGS);
}

static inline bool
is_halant (const hb_glyph_info_t &info)
{
  return is_one_of (info, FLAG (OT_H));
}

#define IN_HALF_BLOCK(u, Base) (((u) & ~0x7Fu) == (Base))

#define IS_DEVA(u) (IN_HALF_BLOCK (u, 0x0900u))
#define IS_BENG(u) (IN_HALF_BLOCK (u, 0x0980u))
#define IS_GURU(u) (IN_HALF_BLOCK (u, 0x0A00u))
#define IS_GUJR(u) (IN_HALF_BLOCK (u, 0x0A80u))
#define IS_ORYA(u) (IN_HALF_BLOCK (u, 0x0B00u))
#define IS_TAML(u) (IN_HALF_BLOCK (u, 0x0B80u))
#define IS_TELU(u) (IN_HALF_BLOCK (u, 0x0C00u))
#define IS_KNDA(u) (IN_HALF_BLOCK (u, 0x0C80u))
#define IS_MLYM(u) (IN_HALF_BLOCK (u, 0x0D00u))
#define IS_SINH(u) (IN_HALF_BLOCK (u, 0x0D80u))


#define MATRA_POS_LEFT(u) POS_PRE_M
#define MATRA_POS_RIGHT(u)  ( \
          IS_DEVA(u) ? POS_AFTER_SUB  : \
          IS_BENG(u) ? POS_AFTER_POST : \
          IS_GURU(u) ? POS_AFTER_POST : \
          IS_GUJR(u) ? POS_AFTER_POST : \
          IS_ORYA(u) ? POS_AFTER_POST : \
          IS_TAML(u) ? POS_AFTER_POST : \
          IS_TELU(u) ? (u <= 0x0C42u ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
          IS_KNDA(u) ? (u < 0x0CC3u || u > 0xCD6u ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
          IS_MLYM(u) ? POS_AFTER_POST : \
          IS_SINH(u) ? POS_AFTER_SUB  : \
          /*default*/  POS_AFTER_SUB    \
        )
#define MATRA_POS_TOP(u)  ( /* BENG and MLYM don't have top matras. */ \
          IS_DEVA(u) ? POS_AFTER_SUB  : \
          IS_GURU(u) ? POS_AFTER_POST : /* Deviate from spec */ \
          IS_GUJR(u) ? POS_AFTER_SUB  : \
          IS_ORYA(u) ? POS_AFTER_MAIN : \
          IS_TAML(u) ? POS_AFTER_SUB  : \
          IS_TELU(u) ? POS_BEFORE_SUB : \
          IS_KNDA(u) ? POS_BEFORE_SUB : \
          IS_SINH(u) ? POS_AFTER_SUB  : \
          /*default*/  POS_AFTER_SUB    \
        )
#define MATRA_POS_BOTTOM(u) ( \
          IS_DEVA(u) ? POS_AFTER_SUB  : \
          IS_BENG(u) ? POS_AFTER_SUB  : \
          IS_GURU(u) ? POS_AFTER_POST : \
          IS_GUJR(u) ? POS_AFTER_POST : \
          IS_ORYA(u) ? POS_AFTER_SUB  : \
          IS_TAML(u) ? POS_AFTER_POST : \
          IS_TELU(u) ? POS_BEFORE_SUB : \
          IS_KNDA(u) ? POS_BEFORE_SUB : \
          IS_MLYM(u) ? POS_AFTER_POST : \
          IS_SINH(u) ? POS_AFTER_SUB  : \
          /*default*/  POS_AFTER_SUB    \
        )

static inline indic_position_t
matra_position_indic (hb_codepoint_t u, indic_position_t side)
{
  switch ((int) side)
  {
    case POS_PRE_C: return MATRA_POS_LEFT (u);
    case POS_POST_C:  return MATRA_POS_RIGHT (u);
    case POS_ABOVE_C: return MATRA_POS_TOP (u);
    case POS_BELOW_C: return MATRA_POS_BOTTOM (u);
  };
  return side;
}

/* XXX
 * This is a hack for now.  We should move this data into the main Indic table.
 * Or completely remove it and just check in the tables.
 */
static const hb_codepoint_t ra_chars[] = {
  0x0930u, /* Devanagari */
  0x09B0u, /* Bengali */
  0x09F0u, /* Bengali */
  0x0A30u, /* Gurmukhi */ /* No Reph */
  0x0AB0u, /* Gujarati */
  0x0B30u, /* Oriya */
  0x0BB0u, /* Tamil */    /* No Reph */
  0x0C30u, /* Telugu */   /* Reph formed only with ZWJ */
  0x0CB0u, /* Kannada */
  0x0D30u, /* Malayalam */  /* No Reph, Logical Repha */

  0x0DBBu, /* Sinhala */  /* Reph formed only with ZWJ */

  0x179Au, /* Khmer */
};

static inline bool
is_ra (hb_codepoint_t u)
{
  for (unsigned int i = 0; i < ARRAY_LENGTH (ra_chars); i++)
    if (u == ra_chars[i])
      return true;
  return false;
}

static inline void
set_indic_properties (hb_glyph_info_t &info)
{
  hb_codepoint_t u = info.codepoint;
  unsigned int type = hb_indic_get_categories (u);
  indic_category_t cat = (indic_category_t) (type & 0x7Fu);
  indic_position_t pos = (indic_position_t) (type >> 8);


  /*
   * Re-assign category
   */

  /* The following act more like the Bindus. */
  if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x0953u, 0x0954u)))
    cat = OT_SM;
  /* The following act like consonants. */
  else if (unlikely (hb_in_ranges<hb_codepoint_t> (u, 0x0A72u, 0x0A73u,
              0x1CF5u, 0x1CF6u)))
    cat = OT_C;
  /* TODO: The following should only be allowed after a Visarga.
   * For now, just treat them like regular tone marks. */
  else if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x1CE2u, 0x1CE8u)))
    cat = OT_A;
  /* TODO: The following should only be allowed after some of
   * the nasalization marks, maybe only for U+1CE9..U+1CF1.
   * For now, just treat them like tone marks. */
  else if (unlikely (u == 0x1CEDu))
    cat = OT_A;
  /* The following take marks in standalone clusters, similar to Avagraha. */
  else if (unlikely (hb_in_ranges<hb_codepoint_t> (u, 0xA8F2u, 0xA8F7u,
              0x1CE9u, 0x1CECu,
              0x1CEEu, 0x1CF1u)))
  {
    cat = OT_Symbol;
    static_assert (((int) INDIC_SYLLABIC_CATEGORY_AVAGRAHA == OT_Symbol), "");
  }
  else if (unlikely (u == 0x0A51u))
  {
    /* https://github.com/harfbuzz/harfbuzz/issues/524 */
    cat = OT_M;
    pos = POS_BELOW_C;
  }

  /* According to ScriptExtensions.txt, these Grantha marks may also be used in Tamil,
   * so the Indic shaper needs to know their categories. */
  else if (unlikely (u == 0x11301u || u == 0x11303u)) cat = OT_SM;
  else if (unlikely (u == 0x1133cu)) cat = OT_N;

  else if (unlikely (u == 0x0AFBu)) cat = OT_N; /* https://github.com/harfbuzz/harfbuzz/issues/552 */

  else if (unlikely (u == 0x0980u)) cat = OT_PLACEHOLDER; /* https://github.com/harfbuzz/harfbuzz/issues/538 */
  else if (unlikely (u == 0x0C80u)) cat = OT_PLACEHOLDER; /* https://github.com/harfbuzz/harfbuzz/pull/623 */
  else if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x2010u, 0x2011u)))
            cat = OT_PLACEHOLDER;
  else if (unlikely (u == 0x25CCu)) cat = OT_DOTTEDCIRCLE;


  /*
   * Re-assign position.
   */

  if ((FLAG_UNSAFE (cat) & CONSONANT_FLAGS))
  {
    pos = POS_BASE_C;
    if (is_ra (u))
      cat = OT_Ra;
  }
  else if (cat == OT_M)
  {
    pos = matra_position_indic (u, pos);
  }
  else if ((FLAG_UNSAFE (cat) & (FLAG (OT_SM) /* | FLAG (OT_VD) */ | FLAG (OT_A) | FLAG (OT_Symbol))))
  {
    pos = POS_SMVD;
  }

  if (unlikely (u == 0x0B01u)) pos = POS_BEFORE_SUB; /* Oriya Bindu is BeforeSub in the spec. */



  info.indic_category() = cat;
  info.indic_position() = pos;
}


#endif /* HB_OT_SHAPE_COMPLEX_INDIC_HH */

Coverage Report

Created: 2018-09-25 14:53

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright © 2012 Google, Inc.
3		*
4		* This is part of HarfBuzz, a text shaping library.
5		*
6		* Permission is hereby granted, without written agreement and without
7		* license or royalty fees, to use, copy, modify, and distribute this
8		* software and its documentation for any purpose, provided that the
9		* above copyright notice and the following two paragraphs appear in
10		* all copies of this software.
11		*
12		* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13		* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14		* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15		* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16		* DAMAGE.
17		*
18		* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19		* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20		* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21		* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22		* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23		*
24		* Google Author(s): Behdad Esfahbod
25		*/
26
27		#ifndef HB_OT_SHAPE_COMPLEX_INDIC_HH
28		#define HB_OT_SHAPE_COMPLEX_INDIC_HH
29
30		#include "hb.hh"
31
32
33		#include "hb-ot-shape-complex.hh"
34		#include "hb-ot-shape.hh" /* XXX Remove */
35
36
37		/* buffer var allocations */
38	0	#define indic_category() complex_var_u8_0() /* indic_category_t */
39	0	#define indic_position() complex_var_u8_1() /* indic_position_t */
40
41
42		#define INDIC_TABLE_ELEMENT_TYPE uint16_t
43
44		/* Cateories used in the OpenType spec:
45		* https://docs.microsoft.com/en-us/typography/script-development/devanagari
46		*/
47		/* Note: This enum is duplicated in the -machine.rl source file.
48		* Not sure how to avoid duplication. */
49		enum indic_category_t {
50		OT_X = 0,
51		OT_C = 1,
52		OT_V = 2,
53		OT_N = 3,
54		OT_H = 4,
55		OT_ZWNJ = 5,
56		OT_ZWJ = 6,
57		OT_M = 7,
58		OT_SM = 8,
59		/* OT_VD = 9, UNUSED; we use OT_A instead. */
60		OT_A = 10,
61		OT_PLACEHOLDER = 11,
62		OT_DOTTEDCIRCLE = 12,
63		OT_RS = 13, /* Register Shifter, used in Khmer OT spec. */
64		OT_Coeng = 14, /* Khmer-style Virama. */
65		OT_Repha = 15, /* Atomically-encoded logical or visual repha. */
66		OT_Ra = 16,
67		OT_CM = 17, /* Consonant-Medial. */
68		OT_Symbol = 18, /* Avagraha, etc that take marks (SM,A,VD). */
69		OT_CS = 19
70		};
71
72	0	#define MEDIAL_FLAGS (FLAG (OT_CM))
73
74		/* Note:
75		*
76		* We treat Vowels and placeholders as if they were consonants. This is safe because Vowels
77		* cannot happen in a consonant syllable. The plus side however is, we can call the
78		* consonant syllable logic from the vowel syllable function and get it all right! */
79	0	#define CONSONANT_FLAGS (FLAG (OT_C) \| FLAG (OT_CS) \| FLAG (OT_Ra) \| MEDIAL_FLAGS \| FLAG (OT_V) \| FLAG (OT_PLACEHOLDER) \| FLAG (OT_DOTTEDCIRCLE))
80	0	#define JOINER_FLAGS (FLAG (OT_ZWJ) \| FLAG (OT_ZWNJ))
81
82
83		/* Visual positions in a syllable from left to right. */
84		enum indic_position_t {
85		POS_START = 0,
86
87		POS_RA_TO_BECOME_REPH = 1,
88		POS_PRE_M = 2,
89		POS_PRE_C = 3,
90
91		POS_BASE_C = 4,
92		POS_AFTER_MAIN = 5,
93
94		POS_ABOVE_C = 6,
95
96		POS_BEFORE_SUB = 7,
97		POS_BELOW_C = 8,
98		POS_AFTER_SUB = 9,
99
100		POS_BEFORE_POST = 10,
101		POS_POST_C = 11,
102		POS_AFTER_POST = 12,
103
104		POS_FINAL_C = 13,
105		POS_SMVD = 14,
106
107		POS_END = 15
108		};
109
110		/* Categories used in IndicSyllabicCategory.txt from UCD. */
111		enum indic_syllabic_category_t {
112		INDIC_SYLLABIC_CATEGORY_OTHER = OT_X,
113
114		INDIC_SYLLABIC_CATEGORY_AVAGRAHA = OT_Symbol,
115		INDIC_SYLLABIC_CATEGORY_BINDU = OT_SM,
116		INDIC_SYLLABIC_CATEGORY_BRAHMI_JOINING_NUMBER = OT_PLACEHOLDER, /* Don't care. */
117		INDIC_SYLLABIC_CATEGORY_CANTILLATION_MARK = OT_A,
118		INDIC_SYLLABIC_CATEGORY_CONSONANT = OT_C,
119		INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD = OT_C,
120		INDIC_SYLLABIC_CATEGORY_CONSONANT_FINAL = OT_CM,
121		INDIC_SYLLABIC_CATEGORY_CONSONANT_HEAD_LETTER = OT_C,
122		INDIC_SYLLABIC_CATEGORY_CONSONANT_KILLER = OT_M, /* U+17CD only. */
123		INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL = OT_CM,
124		INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER = OT_PLACEHOLDER,
125		INDIC_SYLLABIC_CATEGORY_CONSONANT_PRECEDING_REPHA = OT_Repha,
126		INDIC_SYLLABIC_CATEGORY_CONSONANT_PREFIXED = OT_X, /* Don't care. */
127		INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED = OT_CM,
128		INDIC_SYLLABIC_CATEGORY_CONSONANT_SUCCEEDING_REPHA = OT_N,
129		INDIC_SYLLABIC_CATEGORY_CONSONANT_WITH_STACKER = OT_CS,
130		INDIC_SYLLABIC_CATEGORY_GEMINATION_MARK = OT_SM, /* https://github.com/harfbuzz/harfbuzz/issues/552 */
131		INDIC_SYLLABIC_CATEGORY_INVISIBLE_STACKER = OT_Coeng,
132		INDIC_SYLLABIC_CATEGORY_JOINER = OT_ZWJ,
133		INDIC_SYLLABIC_CATEGORY_MODIFYING_LETTER = OT_X,
134		INDIC_SYLLABIC_CATEGORY_NON_JOINER = OT_ZWNJ,
135		INDIC_SYLLABIC_CATEGORY_NUKTA = OT_N,
136		INDIC_SYLLABIC_CATEGORY_NUMBER = OT_PLACEHOLDER,
137		INDIC_SYLLABIC_CATEGORY_NUMBER_JOINER = OT_PLACEHOLDER, /* Don't care. */
138		INDIC_SYLLABIC_CATEGORY_PURE_KILLER = OT_M, /* Is like a vowel matra. */
139		INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER = OT_RS,
140		INDIC_SYLLABIC_CATEGORY_SYLLABLE_MODIFIER = OT_SM,
141		INDIC_SYLLABIC_CATEGORY_TONE_LETTER = OT_X,
142		INDIC_SYLLABIC_CATEGORY_TONE_MARK = OT_N,
143		INDIC_SYLLABIC_CATEGORY_VIRAMA = OT_H,
144		INDIC_SYLLABIC_CATEGORY_VISARGA = OT_SM,
145		INDIC_SYLLABIC_CATEGORY_VOWEL = OT_V,
146		INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT = OT_M,
147		INDIC_SYLLABIC_CATEGORY_VOWEL_INDEPENDENT = OT_V
148		};
149
150		/* Categories used in IndicSMatraCategory.txt from UCD */
151		enum indic_matra_category_t {
152		INDIC_MATRA_CATEGORY_NOT_APPLICABLE = POS_END,
153
154		INDIC_MATRA_CATEGORY_LEFT = POS_PRE_C,
155		INDIC_MATRA_CATEGORY_TOP = POS_ABOVE_C,
156		INDIC_MATRA_CATEGORY_BOTTOM = POS_BELOW_C,
157		INDIC_MATRA_CATEGORY_RIGHT = POS_POST_C,
158
159		/* These should resolve to the position of the last part of the split sequence. */
160		INDIC_MATRA_CATEGORY_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
161		INDIC_MATRA_CATEGORY_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
162		INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM = INDIC_MATRA_CATEGORY_BOTTOM,
163		INDIC_MATRA_CATEGORY_TOP_AND_BOTTOM_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
164		INDIC_MATRA_CATEGORY_TOP_AND_LEFT = INDIC_MATRA_CATEGORY_TOP,
165		INDIC_MATRA_CATEGORY_TOP_AND_LEFT_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
166		INDIC_MATRA_CATEGORY_TOP_AND_RIGHT = INDIC_MATRA_CATEGORY_RIGHT,
167
168		INDIC_MATRA_CATEGORY_OVERSTRUCK = POS_AFTER_MAIN,
169		INDIC_MATRA_CATEGORY_VISUAL_ORDER_LEFT = POS_PRE_M
170		};
171
172		#define INDIC_COMBINE_CATEGORIES(S,M) \
173	0	( \
174	0	ASSERT_STATIC_EXPR_ZERO (S < 255 && M < 255) + \
175	0	( S \| \
176	0	( \
177	0	( \
178	0	S == INDIC_SYLLABIC_CATEGORY_CONSONANT_MEDIAL \|\| \
179	0	S == INDIC_SYLLABIC_CATEGORY_GEMINATION_MARK \|\| \
180	0	S == INDIC_SYLLABIC_CATEGORY_REGISTER_SHIFTER \|\| \
181	0	S == INDIC_SYLLABIC_CATEGORY_CONSONANT_SUCCEEDING_REPHA \|\| \
182	0	S == INDIC_SYLLABIC_CATEGORY_VIRAMA \|\| \
183	0	S == INDIC_SYLLABIC_CATEGORY_VOWEL_DEPENDENT \|\| \
184	0	false \
185	0	? M : INDIC_MATRA_CATEGORY_NOT_APPLICABLE \
186	0	) << 8 \
187	0	) \
188	0	) \
189	0	)
190
191		HB_INTERNAL INDIC_TABLE_ELEMENT_TYPE
192		hb_indic_get_categories (hb_codepoint_t u);
193
194
195		static inline bool
196		is_one_of (const hb_glyph_info_t &info, unsigned int flags)
197	0	{
198	0	/* If it ligated, all bets are off. */
199	0	if (_hb_glyph_info_ligated (&info)) return false;
200	0	return !!(FLAG_UNSAFE (info.indic_category()) & flags);
201	0	} Unexecuted instantiation: hb-ot-shape-complex-indic.cc:is_one_of(hb_glyph_info_t const&, unsigned int) Unexecuted instantiation: hb-ot-shape-complex-khmer.cc:is_one_of(hb_glyph_info_t const&, unsigned int) Unexecuted instantiation: Unified_cpp_gfx_harfbuzz_src0.cpp:is_one_of(hb_glyph_info_t const&, unsigned int)
202
203		static inline bool
204		is_joiner (const hb_glyph_info_t &info)
205	0	{
206	0	return is_one_of (info, JOINER_FLAGS);
207	0	} Unexecuted instantiation: hb-ot-shape-complex-indic.cc:is_joiner(hb_glyph_info_t const&) Unexecuted instantiation: hb-ot-shape-complex-khmer.cc:is_joiner(hb_glyph_info_t const&) Unexecuted instantiation: Unified_cpp_gfx_harfbuzz_src0.cpp:is_joiner(hb_glyph_info_t const&)
208
209		static inline bool
210		is_consonant (const hb_glyph_info_t &info)
211	0	{
212	0	return is_one_of (info, CONSONANT_FLAGS);
213	0	} Unexecuted instantiation: hb-ot-shape-complex-indic.cc:is_consonant(hb_glyph_info_t const&) Unexecuted instantiation: hb-ot-shape-complex-khmer.cc:is_consonant(hb_glyph_info_t const&) Unexecuted instantiation: Unified_cpp_gfx_harfbuzz_src0.cpp:is_consonant(hb_glyph_info_t const&)
214
215		static inline bool
216		is_halant (const hb_glyph_info_t &info)
217	0	{
218	0	return is_one_of (info, FLAG (OT_H));
219	0	} Unexecuted instantiation: hb-ot-shape-complex-indic.cc:is_halant(hb_glyph_info_t const&) Unexecuted instantiation: hb-ot-shape-complex-khmer.cc:is_halant(hb_glyph_info_t const&) Unexecuted instantiation: Unified_cpp_gfx_harfbuzz_src0.cpp:is_halant(hb_glyph_info_t const&)
220
221	0	#define IN_HALF_BLOCK(u, Base) (((u) & ~0x7Fu) == (Base))
222
223	0	#define IS_DEVA(u) (IN_HALF_BLOCK (u, 0x0900u))
224	0	#define IS_BENG(u) (IN_HALF_BLOCK (u, 0x0980u))
225	0	#define IS_GURU(u) (IN_HALF_BLOCK (u, 0x0A00u))
226	0	#define IS_GUJR(u) (IN_HALF_BLOCK (u, 0x0A80u))
227	0	#define IS_ORYA(u) (IN_HALF_BLOCK (u, 0x0B00u))
228	0	#define IS_TAML(u) (IN_HALF_BLOCK (u, 0x0B80u))
229	0	#define IS_TELU(u) (IN_HALF_BLOCK (u, 0x0C00u))
230	0	#define IS_KNDA(u) (IN_HALF_BLOCK (u, 0x0C80u))
231	0	#define IS_MLYM(u) (IN_HALF_BLOCK (u, 0x0D00u))
232	0	#define IS_SINH(u) (IN_HALF_BLOCK (u, 0x0D80u))
233
234
235	0	#define MATRA_POS_LEFT(u) POS_PRE_M
236	0	#define MATRA_POS_RIGHT(u) ( \
237	0	IS_DEVA(u) ? POS_AFTER_SUB : \
238	0	IS_BENG(u) ? POS_AFTER_POST : \
239	0	IS_GURU(u) ? POS_AFTER_POST : \
240	0	IS_GUJR(u) ? POS_AFTER_POST : \
241	0	IS_ORYA(u) ? POS_AFTER_POST : \
242	0	IS_TAML(u) ? POS_AFTER_POST : \
243	0	IS_TELU(u) ? (u <= 0x0C42u ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
244	0	IS_KNDA(u) ? (u < 0x0CC3u \|\| u > 0xCD6u ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
245	0	IS_MLYM(u) ? POS_AFTER_POST : \
246	0	IS_SINH(u) ? POS_AFTER_SUB : \
247	0	/default/ POS_AFTER_SUB \
248	0	)
249	0	#define MATRA_POS_TOP(u) ( /* BENG and MLYM don't have top matras. */ \
250	0	IS_DEVA(u) ? POS_AFTER_SUB : \
251	0	IS_GURU(u) ? POS_AFTER_POST : /* Deviate from spec */ \
252	0	IS_GUJR(u) ? POS_AFTER_SUB : \
253	0	IS_ORYA(u) ? POS_AFTER_MAIN : \
254	0	IS_TAML(u) ? POS_AFTER_SUB : \
255	0	IS_TELU(u) ? POS_BEFORE_SUB : \
256	0	IS_KNDA(u) ? POS_BEFORE_SUB : \
257	0	IS_SINH(u) ? POS_AFTER_SUB : \
258	0	/default/ POS_AFTER_SUB \
259	0	)
260	0	#define MATRA_POS_BOTTOM(u) ( \
261	0	IS_DEVA(u) ? POS_AFTER_SUB : \
262	0	IS_BENG(u) ? POS_AFTER_SUB : \
263	0	IS_GURU(u) ? POS_AFTER_POST : \
264	0	IS_GUJR(u) ? POS_AFTER_POST : \
265	0	IS_ORYA(u) ? POS_AFTER_SUB : \
266	0	IS_TAML(u) ? POS_AFTER_POST : \
267	0	IS_TELU(u) ? POS_BEFORE_SUB : \
268	0	IS_KNDA(u) ? POS_BEFORE_SUB : \
269	0	IS_MLYM(u) ? POS_AFTER_POST : \
270	0	IS_SINH(u) ? POS_AFTER_SUB : \
271	0	/default/ POS_AFTER_SUB \
272	0	)
273
274		static inline indic_position_t
275		matra_position_indic (hb_codepoint_t u, indic_position_t side)
276	0	{
277	0	switch ((int) side)
278	0	{
279	0	case POS_PRE_C: return MATRA_POS_LEFT (u);
280	0	case POS_POST_C: return MATRA_POS_RIGHT (u);
281	0	case POS_ABOVE_C: return MATRA_POS_TOP (u);
282	0	case POS_BELOW_C: return MATRA_POS_BOTTOM (u);
283	0	};
284	0	return side;
285	0	} Unexecuted instantiation: hb-ot-shape-complex-indic.cc:matra_position_indic(unsigned int, indic_position_t) Unexecuted instantiation: hb-ot-shape-complex-khmer.cc:matra_position_indic(unsigned int, indic_position_t) Unexecuted instantiation: Unified_cpp_gfx_harfbuzz_src0.cpp:matra_position_indic(unsigned int, indic_position_t)
286
287		/* XXX
288		* This is a hack for now. We should move this data into the main Indic table.
289		* Or completely remove it and just check in the tables.
290		*/
291		static const hb_codepoint_t ra_chars[] = {
292		0x0930u, /* Devanagari */
293		0x09B0u, /* Bengali */
294		0x09F0u, /* Bengali */
295		0x0A30u, /* Gurmukhi / / No Reph */
296		0x0AB0u, /* Gujarati */
297		0x0B30u, /* Oriya */
298		0x0BB0u, /* Tamil / / No Reph */
299		0x0C30u, /* Telugu / / Reph formed only with ZWJ */
300		0x0CB0u, /* Kannada */
301		0x0D30u, /* Malayalam / / No Reph, Logical Repha */
302
303		0x0DBBu, /* Sinhala / / Reph formed only with ZWJ */
304
305		0x179Au, /* Khmer */
306		};
307
308		static inline bool
309		is_ra (hb_codepoint_t u)
310	0	{
311	0	for (unsigned int i = 0; i < ARRAY_LENGTH (ra_chars); i++)
312	0	if (u == ra_chars[i])
313	0	return true;
314	0	return false;
315	0	} Unexecuted instantiation: hb-ot-shape-complex-indic.cc:is_ra(unsigned int) Unexecuted instantiation: hb-ot-shape-complex-khmer.cc:is_ra(unsigned int) Unexecuted instantiation: Unified_cpp_gfx_harfbuzz_src0.cpp:is_ra(unsigned int)
316
317		static inline void
318		set_indic_properties (hb_glyph_info_t &info)
319	0	{
320	0	hb_codepoint_t u = info.codepoint;
321	0	unsigned int type = hb_indic_get_categories (u);
322	0	indic_category_t cat = (indic_category_t) (type & 0x7Fu);
323	0	indic_position_t pos = (indic_position_t) (type >> 8);
324	0
325	0
326	0	/*
327	0	* Re-assign category
328	0	*/
329	0
330	0	/* The following act more like the Bindus. */
331	0	if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x0953u, 0x0954u)))
332	0	cat = OT_SM;
333	0	/* The following act like consonants. */
334	0	else if (unlikely (hb_in_ranges<hb_codepoint_t> (u, 0x0A72u, 0x0A73u,
335	0	0x1CF5u, 0x1CF6u)))
336	0	cat = OT_C;
337	0	/* TODO: The following should only be allowed after a Visarga.
338	0	* For now, just treat them like regular tone marks. */
339	0	else if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x1CE2u, 0x1CE8u)))
340	0	cat = OT_A;
341	0	/* TODO: The following should only be allowed after some of
342	0	* the nasalization marks, maybe only for U+1CE9..U+1CF1.
343	0	* For now, just treat them like tone marks. */
344	0	else if (unlikely (u == 0x1CEDu))
345	0	cat = OT_A;
346	0	/* The following take marks in standalone clusters, similar to Avagraha. */
347	0	else if (unlikely (hb_in_ranges<hb_codepoint_t> (u, 0xA8F2u, 0xA8F7u,
348	0	0x1CE9u, 0x1CECu,
349	0	0x1CEEu, 0x1CF1u)))
350	0	{
351	0	cat = OT_Symbol;
352	0	static_assert (((int) INDIC_SYLLABIC_CATEGORY_AVAGRAHA == OT_Symbol), "");
353	0	}
354	0	else if (unlikely (u == 0x0A51u))
355	0	{
356	0	/* https://github.com/harfbuzz/harfbuzz/issues/524 */
357	0	cat = OT_M;
358	0	pos = POS_BELOW_C;
359	0	}
360	0
361	0	/* According to ScriptExtensions.txt, these Grantha marks may also be used in Tamil,
362	0	* so the Indic shaper needs to know their categories. */
363	0	else if (unlikely (u == 0x11301u \|\| u == 0x11303u)) cat = OT_SM;
364	0	else if (unlikely (u == 0x1133cu)) cat = OT_N;
365	0
366	0	else if (unlikely (u == 0x0AFBu)) cat = OT_N; /* https://github.com/harfbuzz/harfbuzz/issues/552 */
367	0
368	0	else if (unlikely (u == 0x0980u)) cat = OT_PLACEHOLDER; /* https://github.com/harfbuzz/harfbuzz/issues/538 */
369	0	else if (unlikely (u == 0x0C80u)) cat = OT_PLACEHOLDER; /* https://github.com/harfbuzz/harfbuzz/pull/623 */
370	0	else if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x2010u, 0x2011u)))
371	0	cat = OT_PLACEHOLDER;
372	0	else if (unlikely (u == 0x25CCu)) cat = OT_DOTTEDCIRCLE;
373	0
374	0
375	0	/*
376	0	* Re-assign position.
377	0	*/
378	0
379	0	if ((FLAG_UNSAFE (cat) & CONSONANT_FLAGS))
380	0	{
381	0	pos = POS_BASE_C;
382	0	if (is_ra (u))
383	0	cat = OT_Ra;
384	0	}
385	0	else if (cat == OT_M)
386	0	{
387	0	pos = matra_position_indic (u, pos);
388	0	}
389	0	else if ((FLAG_UNSAFE (cat) & (FLAG (OT_SM) /* \| FLAG (OT_VD) */ \| FLAG (OT_A) \| FLAG (OT_Symbol))))
390	0	{
391	0	pos = POS_SMVD;
392	0	}
393	0
394	0	if (unlikely (u == 0x0B01u)) pos = POS_BEFORE_SUB; /* Oriya Bindu is BeforeSub in the spec. */
395	0
396	0
397	0
398	0	info.indic_category() = cat;
399	0	info.indic_position() = pos;
400	0	} Unexecuted instantiation: hb-ot-shape-complex-indic.cc:set_indic_properties(hb_glyph_info_t&) Unexecuted instantiation: hb-ot-shape-complex-khmer.cc:set_indic_properties(hb_glyph_info_t&) Unexecuted instantiation: Unified_cpp_gfx_harfbuzz_src0.cpp:set_indic_properties(hb_glyph_info_t&)
401
402
403		#endif /* HB_OT_SHAPE_COMPLEX_INDIC_HH */