[Indic] Refactor
Move all the logic that needs to eventually move into the indic table into hb-ot-shape-complex-indic-private.hh.
This commit is contained in:
Behdad Esfahbod
parent
3614ba242f
commit
3eb6f81fd3
@ -31,6 +31,7 @@
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#include "hb-ot-shape-complex-private.hh"
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#include "hb-ot-shape-private.hh" /* XXX Remove */
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/* buffer var allocations */
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@ -152,6 +153,79 @@ enum indic_matra_category_t {
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#include "hb-ot-shape-complex-indic-table.hh"
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#define IN_HALF_BLOCK(u, Base) (((u) & ~0x7F) == (Base))
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#define IS_DEVA(u) (IN_HALF_BLOCK (u, 0x0900))
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#define IS_BENG(u) (IN_HALF_BLOCK (u, 0x0980))
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#define IS_GURM(u) (IN_HALF_BLOCK (u, 0x0A00))
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#define IS_GUJA(u) (IN_HALF_BLOCK (u, 0x0A80))
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#define IS_ORYA(u) (IN_HALF_BLOCK (u, 0x0B00))
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#define IS_TAML(u) (IN_HALF_BLOCK (u, 0x0B80))
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#define IS_TELU(u) (IN_HALF_BLOCK (u, 0x0C00))
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#define IS_KNDA(u) (IN_HALF_BLOCK (u, 0x0C80))
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#define IS_MLYM(u) (IN_HALF_BLOCK (u, 0x0D00))
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#define IS_SINH(u) (IN_HALF_BLOCK (u, 0x0D80))
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#define IS_KHMR(u) (IN_HALF_BLOCK (u, 0x1780))
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#define MATRA_POS_LEFT(u) POS_PRE_M
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#define MATRA_POS_RIGHT(u) ( \
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IS_DEVA(u) ? POS_AFTER_SUB : \
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IS_BENG(u) ? POS_AFTER_POST : \
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IS_GURM(u) ? POS_AFTER_POST : \
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IS_GUJA(u) ? POS_AFTER_POST : \
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IS_ORYA(u) ? POS_AFTER_POST : \
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IS_TAML(u) ? POS_AFTER_POST : \
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IS_TELU(u) ? (u <= 0x0C42 ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
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IS_KNDA(u) ? (u < 0x0CC3 || u > 0xCD6 ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
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IS_MLYM(u) ? POS_AFTER_POST : \
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IS_SINH(u) ? POS_AFTER_SUB : \
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IS_KHMR(u) ? POS_AFTER_POST : \
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/*default*/ POS_AFTER_SUB \
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)
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#define MATRA_POS_TOP(u) ( /* BENG and MLYM don't have top matras. */ \
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IS_DEVA(u) ? POS_AFTER_SUB : \
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IS_GURM(u) ? POS_AFTER_POST : /* Deviate from spec */ \
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IS_GUJA(u) ? POS_AFTER_SUB : \
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IS_ORYA(u) ? POS_AFTER_MAIN : \
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IS_TAML(u) ? POS_AFTER_SUB : \
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IS_TELU(u) ? POS_BEFORE_SUB : \
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IS_KNDA(u) ? POS_BEFORE_SUB : \
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IS_SINH(u) ? POS_AFTER_SUB : \
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IS_KHMR(u) ? POS_AFTER_POST : \
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/*default*/ POS_AFTER_SUB \
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)
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#define MATRA_POS_BOTTOM(u) ( \
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IS_DEVA(u) ? POS_AFTER_SUB : \
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IS_BENG(u) ? POS_AFTER_SUB : \
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IS_GURM(u) ? POS_AFTER_POST : \
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IS_GUJA(u) ? POS_AFTER_POST : \
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IS_ORYA(u) ? POS_AFTER_SUB : \
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IS_TAML(u) ? POS_AFTER_POST : \
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IS_TELU(u) ? POS_BEFORE_SUB : \
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IS_KNDA(u) ? POS_BEFORE_SUB : \
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IS_MLYM(u) ? POS_AFTER_POST : \
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IS_SINH(u) ? POS_AFTER_SUB : \
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IS_KHMR(u) ? POS_AFTER_POST : \
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/*default*/ POS_AFTER_SUB \
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)
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static inline indic_position_t
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matra_position (hb_codepoint_t u, indic_position_t side)
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{
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switch ((int) side)
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{
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case POS_PRE_C: return MATRA_POS_LEFT (u);
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case POS_POST_C: return MATRA_POS_RIGHT (u);
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case POS_ABOVE_C: return MATRA_POS_TOP (u);
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case POS_BELOW_C: return MATRA_POS_BOTTOM (u);
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};
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abort ();
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}
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/* XXX
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* This is a hack for now. We should move this data into the main Indic table.
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* Or completely remove it and just check in the tables.
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@ -173,5 +247,141 @@ static const hb_codepoint_t ra_chars[] = {
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0x179A, /* Khmer */ /* No Reph, Visual Repha */
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};
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static inline indic_position_t
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consonant_position (hb_codepoint_t u)
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{
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if ((u & ~0x007F) == 0x1780)
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return POS_BELOW_C; /* In Khmer coeng model, post and below forms should not be reordered. */
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return POS_BASE_C; /* Will recategorize later based on font lookups. */
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}
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static inline bool
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is_ra (hb_codepoint_t u)
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{
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for (unsigned int i = 0; i < ARRAY_LENGTH (ra_chars); i++)
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if (u == ra_chars[i])
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return true;
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return false;
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}
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static inline bool
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is_one_of (const hb_glyph_info_t &info, unsigned int flags)
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{
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/* If it ligated, all bets are off. */
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if (is_a_ligature (info)) return false;
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return !!(FLAG (info.indic_category()) & flags);
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}
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#define JOINER_FLAGS (FLAG (OT_ZWJ) | FLAG (OT_ZWNJ))
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static inline bool
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is_joiner (const hb_glyph_info_t &info)
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{
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return is_one_of (info, JOINER_FLAGS);
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}
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/* Note:
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*
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* We treat Vowels and placeholders as if they were consonants. This is safe because Vowels
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* cannot happen in a consonant syllable. The plus side however is, we can call the
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* consonant syllable logic from the vowel syllable function and get it all right! */
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#define CONSONANT_FLAGS (FLAG (OT_C) | FLAG (OT_Ra) | FLAG (OT_V) | FLAG (OT_NBSP) | FLAG (OT_DOTTEDCIRCLE))
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static inline bool
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is_consonant (const hb_glyph_info_t &info)
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{
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return is_one_of (info, CONSONANT_FLAGS);
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}
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#define HALANT_OR_COENG_FLAGS (FLAG (OT_H) | FLAG (OT_Coeng))
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static inline bool
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is_halant_or_coeng (const hb_glyph_info_t &info)
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{
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return is_one_of (info, HALANT_OR_COENG_FLAGS);
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}
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static inline void
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set_indic_properties (hb_glyph_info_t &info)
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{
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hb_codepoint_t u = info.codepoint;
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unsigned int type = get_indic_categories (u);
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indic_category_t cat = (indic_category_t) (type & 0x0F);
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indic_position_t pos = (indic_position_t) (type >> 4);
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/*
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* Re-assign category
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*/
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/* The spec says U+0952 is OT_A. However, testing shows that Uniscribe
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* treats U+0951..U+0952 all as OT_VD.
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* TESTS:
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* U+092E,U+0947,U+0952
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* U+092E,U+0952,U+0947
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* U+092E,U+0947,U+0951
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* U+092E,U+0951,U+0947
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* */
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if (unlikely (hb_in_range<hb_codepoint_t> (u, 0x0951, 0x0954)))
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cat = OT_VD;
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if (unlikely (u == 0x17D1))
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cat = OT_X;
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if (cat == OT_X &&
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unlikely (hb_in_range<hb_codepoint_t> (u, 0x17CB, 0x17D3))) /* Khmer Various signs */
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{
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/* These are like Top Matras. */
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cat = OT_M;
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pos = POS_ABOVE_C;
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}
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if (u == 0x17C6) /* Khmer Bindu doesn't like to be repositioned. */
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cat = OT_N;
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if (unlikely (u == 0x17D2)) cat = OT_Coeng; /* Khmer coeng */
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else if (unlikely (u == 0x200C)) cat = OT_ZWNJ;
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else if (unlikely (u == 0x200D)) cat = OT_ZWJ;
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else if (unlikely (u == 0x25CC)) cat = OT_DOTTEDCIRCLE;
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else if (unlikely (u == 0x0A71)) cat = OT_SM; /* GURMUKHI ADDAK. More like consonant medial. like 0A75. */
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if (cat == OT_Repha) {
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/* There are two kinds of characters marked as Repha:
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* - The ones that are GenCat=Mn are already positioned visually, ie. after base. (eg. Khmer)
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* - The ones that are GenCat=Lo is encoded logically, ie. beginning of syllable. (eg. Malayalam)
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*
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* We recategorize the first kind to look like a Nukta and attached to the base directly.
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*/
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if (_hb_glyph_info_get_general_category (&info) == HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK)
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cat = OT_N;
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}
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/*
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* Re-assign position.
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*/
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if ((FLAG (cat) & CONSONANT_FLAGS))
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{
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pos = consonant_position (u);
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if (is_ra (u))
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cat = OT_Ra;
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}
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else if (cat == OT_M)
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{
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pos = matra_position (u, pos);
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}
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else if (cat == OT_SM || cat == OT_VD)
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{
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pos = POS_SMVD;
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}
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if (unlikely (u == 0x0B01)) pos = POS_BEFORE_SUB; /* Oriya Bindu is BeforeSub in the spec. */
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info.indic_category() = cat;
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info.indic_position() = pos;
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}
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#endif /* HB_OT_SHAPE_COMPLEX_INDIC_PRIVATE_HH */
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@ -29,21 +29,6 @@
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#include "hb-ot-layout-private.hh"
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#define IN_HALF_BLOCK(u, Base) (((u) & ~0x7F) == (Base))
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#define IS_DEVA(u) (IN_HALF_BLOCK (u, 0x0900))
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#define IS_BENG(u) (IN_HALF_BLOCK (u, 0x0980))
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#define IS_GURM(u) (IN_HALF_BLOCK (u, 0x0A00))
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#define IS_GUJA(u) (IN_HALF_BLOCK (u, 0x0A80))
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#define IS_ORYA(u) (IN_HALF_BLOCK (u, 0x0B00))
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#define IS_TAML(u) (IN_HALF_BLOCK (u, 0x0B80))
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#define IS_TELU(u) (IN_HALF_BLOCK (u, 0x0C00))
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#define IS_KNDA(u) (IN_HALF_BLOCK (u, 0x0C80))
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#define IS_MLYM(u) (IN_HALF_BLOCK (u, 0x0D00))
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#define IS_SINH(u) (IN_HALF_BLOCK (u, 0x0D80))
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#define IS_KHMR(u) (IN_HALF_BLOCK (u, 0x1780))
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#define OLD_INDIC_TAG(script) (((hb_tag_t) script) | 0x20000000)
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#define IS_OLD_INDIC_TAG(tag) ( \
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(tag) == OLD_INDIC_TAG (HB_SCRIPT_BENGALI) || \
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@ -97,15 +82,6 @@ indic_options (void)
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}
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static int
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compare_codepoint (const void *pa, const void *pb)
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{
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hb_codepoint_t a = * (hb_codepoint_t *) pa;
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hb_codepoint_t b = * (hb_codepoint_t *) pb;
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return a < b ? -1 : a == b ? 0 : +1;
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}
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struct indic_shape_plan_t
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{
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struct would_apply_feature_t
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@ -147,13 +123,10 @@ struct indic_shape_plan_t
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};
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static indic_position_t
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consonant_position (hb_codepoint_t u,
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const indic_shape_plan_t *indic_plan,
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hb_font_t *font)
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consonant_position_from_font (hb_codepoint_t u,
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const indic_shape_plan_t *indic_plan,
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hb_font_t *font)
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{
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if ((u & ~0x007F) == 0x1780)
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return POS_BELOW_C; /* In Khmer coeng model, post and below forms should not be reordered. */
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hb_codepoint_t virama = (u & ~0x007F) | 0x004D;
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if ((u & ~0x007F) == 0x0D80) virama = 0x0DCA; /* Sinahla */
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if ((u & ~0x007F) == 0x1780) virama = 0x17D2; /* Khmaer */
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@ -170,194 +143,6 @@ consonant_position (hb_codepoint_t u,
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return POS_BASE_C;
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}
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#define MATRA_POS_LEFT(u) POS_PRE_M
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#define MATRA_POS_RIGHT(u) ( \
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IS_DEVA(u) ? POS_AFTER_SUB : \
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IS_BENG(u) ? POS_AFTER_POST : \
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IS_GURM(u) ? POS_AFTER_POST : \
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IS_GUJA(u) ? POS_AFTER_POST : \
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IS_ORYA(u) ? POS_AFTER_POST : \
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IS_TAML(u) ? POS_AFTER_POST : \
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IS_TELU(u) ? (u <= 0x0C42 ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
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IS_KNDA(u) ? (u < 0x0CC3 || u > 0xCD6 ? POS_BEFORE_SUB : POS_AFTER_SUB) : \
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IS_MLYM(u) ? POS_AFTER_POST : \
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IS_SINH(u) ? POS_AFTER_SUB : \
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IS_KHMR(u) ? POS_AFTER_POST : \
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/*default*/ POS_AFTER_SUB \
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)
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#define MATRA_POS_TOP(u) ( /* BENG and MLYM don't have top matras. */ \
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IS_DEVA(u) ? POS_AFTER_SUB : \
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IS_GURM(u) ? POS_AFTER_POST : /* Deviate from spec */ \
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IS_GUJA(u) ? POS_AFTER_SUB : \
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IS_ORYA(u) ? POS_AFTER_MAIN : \
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IS_TAML(u) ? POS_AFTER_SUB : \
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IS_TELU(u) ? POS_BEFORE_SUB : \
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IS_KNDA(u) ? POS_BEFORE_SUB : \
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IS_SINH(u) ? POS_AFTER_SUB : \
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IS_KHMR(u) ? POS_AFTER_POST : \
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/*default*/ POS_AFTER_SUB \
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)
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#define MATRA_POS_BOTTOM(u) ( \
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IS_DEVA(u) ? POS_AFTER_SUB : \
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IS_BENG(u) ? POS_AFTER_SUB : \
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IS_GURM(u) ? POS_AFTER_POST : \
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IS_GUJA(u) ? POS_AFTER_POST : \
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IS_ORYA(u) ? POS_AFTER_SUB : \
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IS_TAML(u) ? POS_AFTER_POST : \
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IS_TELU(u) ? POS_BEFORE_SUB : \
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IS_KNDA(u) ? POS_BEFORE_SUB : \
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IS_MLYM(u) ? POS_AFTER_POST : \
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IS_SINH(u) ? POS_AFTER_SUB : \
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IS_KHMR(u) ? POS_AFTER_POST : \
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/*default*/ POS_AFTER_SUB \
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)
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static indic_position_t
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matra_position (hb_codepoint_t u, indic_position_t side)
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{
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switch ((int) side)
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{
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case POS_PRE_C: return MATRA_POS_LEFT (u);
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case POS_POST_C: return MATRA_POS_RIGHT (u);
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case POS_ABOVE_C: return MATRA_POS_TOP (u);
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case POS_BELOW_C: return MATRA_POS_BOTTOM (u);
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};
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abort ();
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}
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static inline bool
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is_ra (hb_codepoint_t u)
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{
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return !!bsearch (&u, ra_chars,
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ARRAY_LENGTH (ra_chars),
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sizeof (ra_chars[0]),
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compare_codepoint);
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}
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static inline bool
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is_one_of (const hb_glyph_info_t &info, unsigned int flags)
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{
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/* If it ligated, all bets are off. */
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if (is_a_ligature (info)) return false;
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return !!(FLAG (info.indic_category()) & flags);
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}
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#define JOINER_FLAGS (FLAG (OT_ZWJ) | FLAG (OT_ZWNJ))
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static inline bool
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is_joiner (const hb_glyph_info_t &info)
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{
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return is_one_of (info, JOINER_FLAGS);
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}
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/* Note:
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*
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* We treat Vowels and placeholders as if they were consonants. This is safe because Vowels
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* cannot happen in a consonant syllable. The plus side however is, we can call the
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* consonant syllable logic from the vowel syllable function and get it all right! */
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#define CONSONANT_FLAGS (FLAG (OT_C) | FLAG (OT_Ra) | FLAG (OT_V) | FLAG (OT_NBSP) | FLAG (OT_DOTTEDCIRCLE))
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static inline bool
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is_consonant (const hb_glyph_info_t &info)
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{
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return is_one_of (info, CONSONANT_FLAGS);
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}
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#define HALANT_OR_COENG_FLAGS (FLAG (OT_H) | FLAG (OT_Coeng))
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static inline bool
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is_halant_or_coeng (const hb_glyph_info_t &info)
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{
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return is_one_of (info, HALANT_OR_COENG_FLAGS);
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}
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static inline void
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set_indic_properties (hb_glyph_info_t &info,
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const indic_shape_plan_t *closure,
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hb_font_t *font)
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{
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hb_codepoint_t u = info.codepoint;
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unsigned int type = get_indic_categories (u);
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indic_category_t cat = (indic_category_t) (type & 0x0F);
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indic_position_t pos = (indic_position_t) (type >> 4);
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/*
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* Re-assign category
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||||
*/
|
||||
|
||||
|
||||
/* 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, closure, font);
|
||||
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;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
struct feature_list_t {
|
||||
@ -477,7 +262,11 @@ setup_masks_indic (const hb_ot_complex_shaper_t *shaper,
|
||||
|
||||
unsigned int count = buffer->len;
|
||||
for (unsigned int i = 0; i < count; i++)
|
||||
set_indic_properties (buffer->info[i], &indic_plan, font);
|
||||
set_indic_properties (buffer->info[i]);
|
||||
|
||||
for (unsigned int i = 0; i < count; i++)
|
||||
if (buffer->info[i].indic_position() == POS_BASE_C)
|
||||
buffer->info[i].indic_position() = consonant_position_from_font (buffer->info[i].codepoint, &indic_plan, font);
|
||||
}
|
||||
|
||||
static int
|
||||
|
||||
Loading…
Reference in New Issue
Block a user