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Don't do fractions if buffer is ASCII-only

This commit is contained in:
Behdad Esfahbod 2015-11-04 18:58:02 -08:00
parent 6986208ba3
commit e3e4bb011a
3 changed files with 6 additions and 3 deletions
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5
src/hb-buffer-private.hh
View File

@ -43,8 +43,9 @@ template <> class hb_mark_as_flags_t<hb_buffer_serialize_flags_t> {};
enum hb_buffer_scratch_flags_t {
HB_BUFFER_SCRATCH_FLAG_DEFAULT = 0x00000000u,
HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES = 0x00000001u,
HB_BUFFER_SCRATCH_FLAG_HAS_SPACE_FALLBACK = 0x00000002u,
HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII = 0x00000001u,
HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES = 0x00000002u,
HB_BUFFER_SCRATCH_FLAG_HAS_SPACE_FALLBACK = 0x00000004u,
};
template <> class hb_mark_as_flags_t<hb_buffer_scratch_flags_t> {};

1
src/hb-ot-layout-private.hh
View File

@ -249,6 +249,7 @@ _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer)
if (u >= 0x80)
{
buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII;
if (unlikely (unicode->is_default_ignorable (u)))
{
buffer->scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES;

3
src/hb-ot-shape.cc
View File

@ -346,7 +346,8 @@ hb_ot_mirror_chars (hb_ot_shape_context_t *c)
static inline void
hb_ot_shape_setup_masks_fraction (hb_ot_shape_context_t *c)
{
if (!c->plan->has_frac)
if (!(c->buffer->scratch_flags & HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII) ||
!c->plan->has_frac)
return;
hb_buffer_t *buffer = c->buffer;