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[ot-font] Towards accelerating get_glyph()

This commit is contained in:
Behdad Esfahbod 2016-02-24 19:52:36 +09:00
parent 5473ebfb84
commit e0f16a715b
1 changed files with 20 additions and 3 deletions
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23
src/hb-ot-font.cc
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@ -201,9 +201,24 @@ struct hb_ot_face_glyf_accelerator_t
}
};
typedef bool (*hb_cmap_get_glyph_func_t) (const void *obj,
hb_codepoint_t codepoint,
hb_codepoint_t *glyph);
template <typename Type>
static inline bool get_glyph_from (const void *obj,
hb_codepoint_t codepoint,
hb_codepoint_t *glyph)
{
const Type *typed_obj = (const Type *) obj;
return typed_obj->get_glyph (codepoint, glyph);
}
struct hb_ot_face_cmap_accelerator_t
{
const OT::CmapSubtable *table;
hb_cmap_get_glyph_func_t get_glyph_func;
const void *get_glyph_data;
const OT::CmapSubtableFormat14 *uvs_table;
hb_blob_t *blob;
@ -238,8 +253,10 @@ struct hb_ot_face_cmap_accelerator_t
/* Meh. */
if (!subtable_uvs) subtable_uvs = &OT::Null(OT::CmapSubtableFormat14);
this->table = subtable;
this->uvs_table = subtable_uvs;
this->get_glyph_func = get_glyph_from<OT::CmapSubtable>;
this->get_glyph_data = subtable;
}
inline void fini (void)
@ -250,7 +267,7 @@ struct hb_ot_face_cmap_accelerator_t
inline bool get_nominal_glyph (hb_codepoint_t unicode,
hb_codepoint_t *glyph) const
{
return this->table->get_glyph (unicode, glyph);
return this->get_glyph_func (this->get_glyph_data, unicode, glyph);
}
inline bool get_variation_glyph (hb_codepoint_t unicode,