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[ot-layout] Port foreach_grapheme to buffer foreach_group

This commit is contained in:
Behdad Esfahbod 2021-12-10 12:58:27 -07:00
parent eb96e69d18
commit e949e51218
1 changed files with 7 additions and 17 deletions
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24
src/hb-ot-layout.hh
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@ -350,25 +350,15 @@ _hb_glyph_info_is_continuation (const hb_glyph_info_t *info)
{
return info->unicode_props() & UPROPS_MASK_CONTINUATION;
}
/* Loop over grapheme. Based on foreach_cluster(). */
static inline bool
_hb_grapheme_group_func (const hb_glyph_info_t& a HB_UNUSED,
const hb_glyph_info_t& b)
{ return _hb_glyph_info_is_continuation (&b); }
#define foreach_grapheme(buffer, start, end) \
for (unsigned int \
_count = buffer->len, \
start = 0, end = _count ? _hb_next_grapheme (buffer, 0) : 0; \
start < _count; \
start = end, end = _hb_next_grapheme (buffer, start))
foreach_group (buffer, start, end, _hb_grapheme_group_func)
static inline unsigned int
_hb_next_grapheme (hb_buffer_t *buffer, unsigned int start)
{
hb_glyph_info_t *info = buffer->info;
unsigned int count = buffer->len;
while (++start < count && _hb_glyph_info_is_continuation (&info[start]))
;
return start;
}
static inline bool
_hb_glyph_info_is_unicode_format (const hb_glyph_info_t *info)