diff options
Diffstat (limited to 'src/hb-ot-font.cc')
| -rw-r--r-- | src/hb-ot-font.cc | 103 |
1 files changed, 76 insertions, 27 deletions
diff --git a/src/hb-ot-font.cc b/src/hb-ot-font.cc index e7b57b88a..61c703655 100644 --- a/src/hb-ot-font.cc +++ b/src/hb-ot-font.cc @@ -201,10 +201,26 @@ 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; - const OT::CmapSubtable *uvs_table; + hb_cmap_get_glyph_func_t get_glyph_func; + const void *get_glyph_data; + OT::CmapSubtableFormat4::accelerator_t format4_accel; + + const OT::CmapSubtableFormat14 *uvs_table; hb_blob_t *blob; inline void init (hb_face_t *face) @@ -212,7 +228,7 @@ struct hb_ot_face_cmap_accelerator_t this->blob = OT::Sanitizer<OT::cmap>::sanitize (face->reference_table (HB_OT_TAG_cmap)); const OT::cmap *cmap = OT::Sanitizer<OT::cmap>::lock_instance (this->blob); const OT::CmapSubtable *subtable = NULL; - const OT::CmapSubtable *subtable_uvs = NULL; + const OT::CmapSubtableFormat14 *subtable_uvs = NULL; /* 32-bit subtables. */ if (!subtable) subtable = cmap->find_subtable (3, 10); @@ -229,12 +245,30 @@ struct hb_ot_face_cmap_accelerator_t if (!subtable) subtable = &OT::Null(OT::CmapSubtable); /* UVS subtable. */ - if (!subtable_uvs) subtable_uvs = cmap->find_subtable (0, 5); + if (!subtable_uvs) + { + const OT::CmapSubtable *st = cmap->find_subtable (0, 5); + if (st && st->u.format == 14) + subtable_uvs = &st->u.format14; + } /* Meh. */ - if (!subtable_uvs) subtable_uvs = &OT::Null(OT::CmapSubtable); + if (!subtable_uvs) subtable_uvs = &OT::Null(OT::CmapSubtableFormat14); - this->table = subtable; this->uvs_table = subtable_uvs; + + this->get_glyph_data = subtable; + switch (subtable->u.format) { + /* Accelerate format 4 and format 12. */ + default: this->get_glyph_func = get_glyph_from<OT::CmapSubtable>; break; + case 12: this->get_glyph_func = get_glyph_from<OT::CmapSubtableFormat12>; break; + case 4: + { + this->format4_accel.init (&subtable->u.format4); + this->get_glyph_data = &this->format4_accel; + this->get_glyph_func = this->format4_accel.get_glyph_func; + } + break; + } } inline void fini (void) @@ -242,23 +276,26 @@ struct hb_ot_face_cmap_accelerator_t hb_blob_destroy (this->blob); } - inline bool get_glyph (hb_codepoint_t unicode, - hb_codepoint_t variation_selector, - hb_codepoint_t *glyph) const + inline bool get_nominal_glyph (hb_codepoint_t unicode, + hb_codepoint_t *glyph) const + { + return this->get_glyph_func (this->get_glyph_data, unicode, glyph); + } + + inline bool get_variation_glyph (hb_codepoint_t unicode, + hb_codepoint_t variation_selector, + hb_codepoint_t *glyph) const { - if (unlikely (variation_selector)) + switch (this->uvs_table->get_glyph_variant (unicode, + variation_selector, + glyph)) { - switch (this->uvs_table->get_glyph_variant (unicode, - variation_selector, - glyph)) - { - case OT::GLYPH_VARIANT_NOT_FOUND: return false; - case OT::GLYPH_VARIANT_FOUND: return true; - case OT::GLYPH_VARIANT_USE_DEFAULT: break; - } + case OT::GLYPH_VARIANT_NOT_FOUND: return false; + case OT::GLYPH_VARIANT_FOUND: return true; + case OT::GLYPH_VARIANT_USE_DEFAULT: break; } - return this->table->get_glyph (unicode, glyph); + return get_nominal_glyph (unicode, glyph); } }; @@ -301,16 +338,27 @@ _hb_ot_font_destroy (hb_ot_font_t *ot_font) static hb_bool_t -hb_ot_get_glyph (hb_font_t *font HB_UNUSED, - void *font_data, - hb_codepoint_t unicode, - hb_codepoint_t variation_selector, - hb_codepoint_t *glyph, - void *user_data HB_UNUSED) +hb_ot_get_nominal_glyph (hb_font_t *font HB_UNUSED, + void *font_data, + hb_codepoint_t unicode, + hb_codepoint_t *glyph, + void *user_data HB_UNUSED) + +{ + const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data; + return ot_font->cmap.get_nominal_glyph (unicode, glyph); +} +static hb_bool_t +hb_ot_get_variation_glyph (hb_font_t *font HB_UNUSED, + void *font_data, + hb_codepoint_t unicode, + hb_codepoint_t variation_selector, + hb_codepoint_t *glyph, + void *user_data HB_UNUSED) { const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data; - return ot_font->cmap.get_glyph (unicode, variation_selector, glyph); + return ot_font->cmap.get_variation_glyph (unicode, variation_selector, glyph); } static hb_position_t @@ -397,7 +445,8 @@ retry: hb_font_funcs_set_font_h_extents_func (funcs, hb_ot_get_font_h_extents, NULL, NULL); hb_font_funcs_set_font_v_extents_func (funcs, hb_ot_get_font_v_extents, NULL, NULL); - hb_font_funcs_set_glyph_func (funcs, hb_ot_get_glyph, NULL, NULL); + hb_font_funcs_set_nominal_glyph_func (funcs, hb_ot_get_nominal_glyph, NULL, NULL); + hb_font_funcs_set_variation_glyph_func (funcs, hb_ot_get_variation_glyph, NULL, NULL); hb_font_funcs_set_glyph_h_advance_func (funcs, hb_ot_get_glyph_h_advance, NULL, NULL); hb_font_funcs_set_glyph_v_advance_func (funcs, hb_ot_get_glyph_v_advance, NULL, NULL); //hb_font_funcs_set_glyph_h_origin_func (funcs, hb_ot_get_glyph_h_origin, NULL, NULL); |