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[indic] Better Reph matching

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This commit is contained in:
Behdad Esfahbod 2012-05-09 11:43:43 +02:00
parent df6d45c693
commit 76b3409de6
1 changed files with 17 additions and 8 deletions
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25
src/hb-ot-shape-complex-indic.cc
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@ -220,14 +220,24 @@ found_consonant_syllable (const hb_ot_map_t *map, hb_buffer_t *buffer, hb_mask_t
*/ */
unsigned int base = end; unsigned int base = end;
bool has_reph = false;
/* -> If the syllable starts with Ra + Halant (in a script that has Reph)
* and has more than one consonant, Ra is excluded from candidates for
* base consonants. */
unsigned int limit = start;
if (mask_array[RPHF] &&
start + 2 < end &&
info[start].indic_category() == OT_Ra &&
info[start + 1].indic_category() == OT_H)
{
limit += 2;
base = start;
has_reph = true;
};
/* -> starting from the end of the syllable, move backwards */ /* -> starting from the end of the syllable, move backwards */
i = end; i = end;
unsigned int limit = start;
if (info[start].indic_category() == OT_Ra && start + 2 <= end) {
limit += 2;
base = start;
};
do { do {
i--; i--;
/* -> until a consonant is found */ /* -> until a consonant is found */
@ -308,9 +318,8 @@ found_consonant_syllable (const hb_ot_map_t *map, hb_buffer_t *buffer, hb_mask_t
/* Handle beginning Ra */ /* Handle beginning Ra */
if (start + 3 <= end && if (has_reph &&
info[start].indic_category() == OT_Ra && start + 3 <= end &&
info[start + 1].indic_category() == OT_H &&
!is_joiner (info[start + 2])) !is_joiner (info[start + 2]))
{ {
info[start].indic_position() = POS_POST; info[start].indic_position() = POS_POST;