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[GSUB/GDEF] Guess glyph classes after substitution only if no GDEF 

Brings down Khmer failures with Daun Penh font from 36% to 20%.
This commit is contained in:
Behdad Esfahbod 2012-07-16 16:13:32 -04:00
parent fcdc5f1c88
commit 60da763dfa
1 changed files with 13 additions and 7 deletions
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20
src/hb-ot-layout-gsubgpos-private.hh
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@ -110,6 +110,7 @@ struct hb_apply_context_t
unsigned int lookup_props;
unsigned int property; /* propety of first glyph */
unsigned int debug_depth;
bool has_glyph_classes;
hb_apply_context_t (hb_font_t *font_,
@ -120,7 +121,8 @@ struct hb_apply_context_t
direction (buffer_->props.direction),
lookup_mask (lookup_mask_),
nesting_level_left (MAX_NESTING_LEVEL),
lookup_props (0), property (0), debug_depth (0) {}
lookup_props (0), property (0), debug_depth (0),
has_glyph_classes (hb_ot_layout_has_glyph_classes (face_)) {}
void set_lookup (const Lookup &l) {
lookup_props = l.get_props ();
@ -229,25 +231,29 @@ struct hb_apply_context_t
return _hb_ot_layout_skip_mark (face, &buffer->cur(), lookup_props, &property);
}
inline void set_klass_guess (unsigned int klass_guess) const
{
buffer->cur().props_cache() = has_glyph_classes ? 0 : klass_guess;
}
inline void output_glyph (hb_codepoint_t glyph_index,
unsigned int klass = 0) const
unsigned int klass_guess = 0) const
{
buffer->cur().props_cache() = klass; /*XXX if has gdef? */
set_klass_guess (klass_guess);
buffer->output_glyph (glyph_index);
}
inline void replace_glyph (hb_codepoint_t glyph_index,
unsigned int klass = 0) const
unsigned int klass_guess = 0) const
{
buffer->cur().props_cache() = klass; /*XXX if has gdef? */
set_klass_guess (klass_guess);
buffer->replace_glyph (glyph_index);
}
inline void replace_glyphs (unsigned int num_in,
unsigned int num_out,
hb_codepoint_t *glyph_data,
unsigned int klass = 0) const
unsigned int klass_guess = 0) const
{
buffer->cur().props_cache() = klass; /* XXX if has gdef? */
set_klass_guess (klass_guess);
buffer->replace_glyphs (num_in, num_out, glyph_data);
}
};