#include "hb-ot-shape-private.hh" /* XXX Remove */
-/* buffer var allocations */
-#define indic_category() complex_var_u8_0() /* indic_category_t */
-#define indic_position() complex_var_u8_1() /* indic_matra_category_t */
-
-
#define INDIC_TABLE_ELEMENT_TYPE uint16_t
/* Cateories used in the OpenType spec:
* 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
+ 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,
+ 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_CM2 = 31 /* Consonant-Medial, second slot. */
};
+#define MEDIAL_FLAGS (FLAG (OT_CM) | FLAG (OT_CM2))
+
+/* 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_Ra) | MEDIAL_FLAGS | FLAG (OT_V) | FLAG (OT_PLACEHOLDER) | FLAG (OT_DOTTEDCIRCLE))
+#define JOINER_FLAGS (FLAG (OT_ZWJ) | FLAG (OT_ZWNJ))
+#define HALANT_OR_COENG_FLAGS (FLAG (OT_H) | FLAG (OT_Coeng))
+
+
/* Visual positions in a syllable from left to right. */
enum indic_position_t {
POS_START,
/* 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_C,
- 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
+ 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, /* TODO */
+ 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_MEDIAL = OT_CM,
+ INDIC_SYLLABIC_CATEGORY_CONSONANT_PLACEHOLDER = OT_PLACEHOLDER,
+ INDIC_SYLLABIC_CATEGORY_CONSONANT_PRECEDING_REPHA = OT_Repha,
+ INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED = OT_CM,
+ INDIC_SYLLABIC_CATEGORY_CONSONANT_SUCCEEDING_REPHA = OT_N,
+ INDIC_SYLLABIC_CATEGORY_GEMINATION_MARK = OT_SM,
+ INDIC_SYLLABIC_CATEGORY_INVISIBLE_STACKER = OT_H, /* TODO */
+ 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, /* TODO */
+ INDIC_SYLLABIC_CATEGORY_PURE_KILLER = OT_H, /* TODO */
+ 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_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,
+ 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
+ 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
};
/* 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 (M == INDIC_MATRA_CATEGORY_NOT_APPLICABLE || \
+ ( \
+ 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)) + \
ASSERT_STATIC_EXPR_ZERO (S < 255 && M < 255) + \
((M << 8) | S))
-
-#include "hb-ot-shape-complex-indic-table.hh"
-
-
-#define IN_HALF_BLOCK(u, Base) (((u) & ~0x7F) == (Base))
-
-#define IS_DEVA(u) (IN_HALF_BLOCK (u, 0x0900))
-#define IS_BENG(u) (IN_HALF_BLOCK (u, 0x0980))
-#define IS_GURU(u) (IN_HALF_BLOCK (u, 0x0A00))
-#define IS_GUJR(u) (IN_HALF_BLOCK (u, 0x0A80))
-#define IS_ORYA(u) (IN_HALF_BLOCK (u, 0x0B00))
-#define IS_TAML(u) (IN_HALF_BLOCK (u, 0x0B80))
-#define IS_TELU(u) (IN_HALF_BLOCK (u, 0x0C00))
-#define IS_KNDA(u) (IN_HALF_BLOCK (u, 0x0C80))
-#define IS_MLYM(u) (IN_HALF_BLOCK (u, 0x0D00))
-#define IS_SINH(u) (IN_HALF_BLOCK (u, 0x0D80))
-#define IS_KHMR(u) (IN_HALF_BLOCK (u, 0x1780))
-
-
-#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 <= 0x0C42 ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
- IS_KNDA(u) ? (u < 0x0CC3 || u > 0xCD6 ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
- IS_MLYM(u) ? POS_AFTER_POST : \
- IS_SINH(u) ? POS_AFTER_SUB : \
- IS_KHMR(u) ? POS_AFTER_POST : \
- /*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 : \
- IS_KHMR(u) ? POS_AFTER_POST : \
- /*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 : \
- IS_KHMR(u) ? POS_AFTER_POST : \
- /*default*/ POS_AFTER_SUB \
- )
-
-
-static inline indic_position_t
-matra_position (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[] = {
- 0x0930, /* Devanagari */
- 0x09B0, /* Bengali */
- 0x09F0, /* Bengali */
- 0x0A30, /* Gurmukhi */ /* No Reph */
- 0x0AB0, /* Gujarati */
- 0x0B30, /* Oriya */
- 0x0BB0, /* Tamil */ /* No Reph */
- 0x0C30, /* Telugu */ /* Reph formed only with ZWJ */
- 0x0CB0, /* Kannada */
- 0x0D30, /* Malayalam */ /* No Reph, Logical Repha */
-
- 0x0DBB, /* Sinhala */ /* Reph formed only with ZWJ */
-
- 0x179A, /* Khmer */ /* No Reph, Visual Repha */
-};
-
-static inline indic_position_t
-consonant_position (hb_codepoint_t u)
-{
- if ((u & ~0x007F) == 0x1780)
- return POS_BELOW_C; /* In Khmer coeng model, post and below forms should not be reordered. */
- return POS_BASE_C; /* Will recategorize later based on font lookups. */
-}
-
-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 bool
-is_one_of (const hb_glyph_info_t &info, unsigned int flags)
-{
- /* If it ligated, all bets are off. */
- if (is_a_ligature (info)) return false;
- return !!(FLAG (info.indic_category()) & flags);
-}
-
-#define JOINER_FLAGS (FLAG (OT_ZWJ) | FLAG (OT_ZWNJ))
-static inline bool
-is_joiner (const hb_glyph_info_t &info)
-{
- return is_one_of (info, JOINER_FLAGS);
-}
-
-/* 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_CM) | FLAG (OT_Ra) | FLAG (OT_V) | FLAG (OT_NBSP) | FLAG (OT_DOTTEDCIRCLE))
-static inline bool
-is_consonant (const hb_glyph_info_t &info)
-{
- return is_one_of (info, CONSONANT_FLAGS);
-}
-
-#define HALANT_OR_COENG_FLAGS (FLAG (OT_H) | FLAG (OT_Coeng))
-static inline bool
-is_halant_or_coeng (const hb_glyph_info_t &info)
-{
- return is_one_of (info, HALANT_OR_COENG_FLAGS);
-}
-
-static inline void
-set_indic_properties (hb_glyph_info_t &info)
-{
- hb_codepoint_t u = info.codepoint;
- unsigned int type = get_indic_categories (u);
- indic_category_t cat = (indic_category_t) (type & 0x7F);
- indic_position_t pos = (indic_position_t) (type >> 8);
-
-
- /*
- * Re-assign category
- */
-
-
- /* The spec says U+0952 is OT_A. However, testing shows that Uniscribe
- * treats U+0951..U+0952 all as OT_VD.
- * TESTS:
- * U+092E,U+0947,U+0952
- * U+092E,U+0952,U+0947
- * U+092E,U+0947,U+0951
- * U+092E,U+0951,U+0947
- * */
- if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x0951, 0x0954)))
- cat = OT_VD;
-
- if (unlikely (u == 0x17D1))
- cat = OT_X;
- if (cat == OT_X &&
- unlikely (hb_in_range<hb_codepoint_t> (u, 0x17CB, 0x17D3))) /* Khmer Various signs */
- {
- /* These are like Top Matras. */
- cat = OT_M;
- pos = POS_ABOVE_C;
- }
- if (u == 0x17C6) /* Khmer Bindu doesn't like to be repositioned. */
- cat = OT_N;
-
- if (unlikely (u == 0x17D2)) cat = OT_Coeng; /* Khmer coeng */
- else if (unlikely (u == 0x200C)) cat = OT_ZWNJ;
- else if (unlikely (u == 0x200D)) cat = OT_ZWJ;
- else if (unlikely (u == 0x25CC)) cat = OT_DOTTEDCIRCLE;
- else if (unlikely (u == 0x0A71)) cat = OT_SM; /* GURMUKHI ADDAK. More like consonant medial. like 0A75. */
-
- if (cat == OT_Repha) {
- /* There are two kinds of characters marked as Repha:
- * - The ones that are GenCat=Mn are already positioned visually, ie. after base. (eg. Khmer)
- * - The ones that are GenCat=Lo is encoded logically, ie. beginning of syllable. (eg. Malayalam)
- *
- * We recategorize the first kind to look like a Nukta and attached to the base directly.
- */
- if (_hb_glyph_info_get_general_category (&info) == HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK)
- cat = OT_N;
- }
-
-
-
- /*
- * Re-assign position.
- */
-
- if ((FLAG (cat) & CONSONANT_FLAGS))
- {
- pos = consonant_position (u);
- if (is_ra (u))
- cat = OT_Ra;
- }
- else if (cat == OT_M)
- {
- pos = matra_position (u, pos);
- }
- else if (cat == OT_SM || cat == OT_VD)
- {
- pos = POS_SMVD;
- }
-
- if (unlikely (u == 0x0B01)) pos = POS_BEFORE_SUB; /* Oriya Bindu is BeforeSub in the spec. */
-
-
-
- info.indic_category() = cat;
- info.indic_position() = pos;
-}
-
-
+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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