[ot] Move hb_ot_face_cmap_accelerator_t
This commit is contained in:
Behdad Esfahbod
parent
a7f15959b5
commit
977ddff1f1
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@ -496,6 +496,146 @@ struct cmap
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{
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static const hb_tag_t tableTag = HB_OT_TAG_cmap;
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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likely (version == 0) &&
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encodingRecord.sanitize (c, this));
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}
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struct accelerator_t
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{
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inline void init (hb_face_t *face)
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{
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this->blob = OT::Sanitizer<OT::cmap>::sanitize (face->reference_table (HB_OT_TAG_cmap));
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const OT::cmap *cmap = OT::Sanitizer<OT::cmap>::lock_instance (this->blob);
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const OT::CmapSubtable *subtable = nullptr;
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const OT::CmapSubtableFormat14 *subtable_uvs = nullptr;
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bool symbol = false;
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/* 32-bit subtables. */
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if (!subtable) subtable = cmap->find_subtable (3, 10);
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if (!subtable) subtable = cmap->find_subtable (0, 6);
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if (!subtable) subtable = cmap->find_subtable (0, 4);
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/* 16-bit subtables. */
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if (!subtable) subtable = cmap->find_subtable (3, 1);
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if (!subtable) subtable = cmap->find_subtable (0, 3);
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if (!subtable) subtable = cmap->find_subtable (0, 2);
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if (!subtable) subtable = cmap->find_subtable (0, 1);
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if (!subtable) subtable = cmap->find_subtable (0, 0);
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if (!subtable)
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{
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subtable = cmap->find_subtable (3, 0);
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if (subtable) symbol = true;
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}
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/* Meh. */
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if (!subtable) subtable = &OT::Null(OT::CmapSubtable);
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/* UVS subtable. */
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if (!subtable_uvs)
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{
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const OT::CmapSubtable *st = cmap->find_subtable (0, 5);
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if (st && st->u.format == 14)
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subtable_uvs = &st->u.format14;
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}
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/* Meh. */
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if (!subtable_uvs) subtable_uvs = &OT::Null(OT::CmapSubtableFormat14);
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this->uvs_table = subtable_uvs;
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this->get_glyph_data = subtable;
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if (unlikely (symbol))
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this->get_glyph_func = get_glyph_from_symbol<OT::CmapSubtable>;
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else
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switch (subtable->u.format) {
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/* Accelerate format 4 and format 12. */
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default: this->get_glyph_func = get_glyph_from<OT::CmapSubtable>; break;
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case 12: this->get_glyph_func = get_glyph_from<OT::CmapSubtableFormat12>; break;
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case 4:
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{
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this->format4_accel.init (&subtable->u.format4);
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this->get_glyph_data = &this->format4_accel;
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this->get_glyph_func = this->format4_accel.get_glyph_func;
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}
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break;
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}
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}
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inline void fini (void)
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{
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hb_blob_destroy (this->blob);
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}
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inline bool get_nominal_glyph (hb_codepoint_t unicode,
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hb_codepoint_t *glyph) const
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{
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return this->get_glyph_func (this->get_glyph_data, unicode, glyph);
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}
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inline bool get_variation_glyph (hb_codepoint_t unicode,
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hb_codepoint_t variation_selector,
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hb_codepoint_t *glyph) const
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{
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switch (this->uvs_table->get_glyph_variant (unicode,
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variation_selector,
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glyph))
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{
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case OT::GLYPH_VARIANT_NOT_FOUND: return false;
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case OT::GLYPH_VARIANT_FOUND: return true;
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case OT::GLYPH_VARIANT_USE_DEFAULT: break;
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}
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return get_nominal_glyph (unicode, glyph);
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}
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protected:
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typedef bool (*hb_cmap_get_glyph_func_t) (const void *obj,
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hb_codepoint_t codepoint,
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hb_codepoint_t *glyph);
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template <typename Type>
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static inline bool get_glyph_from (const void *obj,
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hb_codepoint_t codepoint,
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hb_codepoint_t *glyph)
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{
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const Type *typed_obj = (const Type *) obj;
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return typed_obj->get_glyph (codepoint, glyph);
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}
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template <typename Type>
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static inline bool get_glyph_from_symbol (const void *obj,
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hb_codepoint_t codepoint,
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hb_codepoint_t *glyph)
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{
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const Type *typed_obj = (const Type *) obj;
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if (likely (typed_obj->get_glyph (codepoint, glyph)))
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return true;
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if (codepoint <= 0x00FFu)
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{
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/* For symbol-encoded OpenType fonts, we duplicate the
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* U+F000..F0FF range at U+0000..U+00FF. That's what
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* Windows seems to do, and that's hinted about at:
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* http://www.microsoft.com/typography/otspec/recom.htm
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* under "Non-Standard (Symbol) Fonts". */
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return typed_obj->get_glyph (0xF000u + codepoint, glyph);
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}
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return false;
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}
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private:
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hb_cmap_get_glyph_func_t get_glyph_func;
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const void *get_glyph_data;
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OT::CmapSubtableFormat4::accelerator_t format4_accel;
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const OT::CmapSubtableFormat14 *uvs_table;
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hb_blob_t *blob;
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};
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protected:
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inline const CmapSubtable *find_subtable (unsigned int platform_id,
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unsigned int encoding_id) const
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{
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@ -513,14 +653,7 @@ struct cmap
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return &(this+encodingRecord[result].subtable);
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}
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inline bool sanitize (hb_sanitize_context_t *c) const
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{
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TRACE_SANITIZE (this);
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return_trace (c->check_struct (this) &&
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likely (version == 0) &&
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encodingRecord.sanitize (c, this));
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}
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protected:
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USHORT version; /* Table version number (0). */
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SortedArrayOf<EncodingRecord>
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encodingRecord; /* Encoding tables. */
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@ -40,137 +40,9 @@
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#include "hb-ot-post-table.hh"
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typedef bool (*hb_cmap_get_glyph_func_t) (const void *obj,
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hb_codepoint_t codepoint,
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hb_codepoint_t *glyph);
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template <typename Type>
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static inline bool get_glyph_from (const void *obj,
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hb_codepoint_t codepoint,
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hb_codepoint_t *glyph)
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{
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const Type *typed_obj = (const Type *) obj;
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return typed_obj->get_glyph (codepoint, glyph);
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}
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template <typename Type>
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static inline bool get_glyph_from_symbol (const void *obj,
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hb_codepoint_t codepoint,
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hb_codepoint_t *glyph)
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{
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const Type *typed_obj = (const Type *) obj;
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if (likely (typed_obj->get_glyph (codepoint, glyph)))
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return true;
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if (codepoint <= 0x00FFu)
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{
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/* For symbol-encoded OpenType fonts, we duplicate the
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* U+F000..F0FF range at U+0000..U+00FF. That's what
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* Windows seems to do, and that's hinted about at:
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* http://www.microsoft.com/typography/otspec/recom.htm
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* under "Non-Standard (Symbol) Fonts". */
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return typed_obj->get_glyph (0xF000u + codepoint, glyph);
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}
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return false;
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}
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struct hb_ot_face_cmap_accelerator_t
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{
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hb_cmap_get_glyph_func_t get_glyph_func;
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const void *get_glyph_data;
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OT::CmapSubtableFormat4::accelerator_t format4_accel;
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const OT::CmapSubtableFormat14 *uvs_table;
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hb_blob_t *blob;
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inline void init (hb_face_t *face)
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{
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this->blob = OT::Sanitizer<OT::cmap>::sanitize (face->reference_table (HB_OT_TAG_cmap));
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const OT::cmap *cmap = OT::Sanitizer<OT::cmap>::lock_instance (this->blob);
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const OT::CmapSubtable *subtable = nullptr;
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const OT::CmapSubtableFormat14 *subtable_uvs = nullptr;
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bool symbol = false;
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/* 32-bit subtables. */
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if (!subtable) subtable = cmap->find_subtable (3, 10);
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if (!subtable) subtable = cmap->find_subtable (0, 6);
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if (!subtable) subtable = cmap->find_subtable (0, 4);
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/* 16-bit subtables. */
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if (!subtable) subtable = cmap->find_subtable (3, 1);
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if (!subtable) subtable = cmap->find_subtable (0, 3);
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if (!subtable) subtable = cmap->find_subtable (0, 2);
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if (!subtable) subtable = cmap->find_subtable (0, 1);
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if (!subtable) subtable = cmap->find_subtable (0, 0);
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if (!subtable)
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{
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subtable = cmap->find_subtable (3, 0);
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if (subtable) symbol = true;
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}
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/* Meh. */
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if (!subtable) subtable = &OT::Null(OT::CmapSubtable);
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/* UVS subtable. */
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if (!subtable_uvs)
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{
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const OT::CmapSubtable *st = cmap->find_subtable (0, 5);
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if (st && st->u.format == 14)
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subtable_uvs = &st->u.format14;
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}
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/* Meh. */
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if (!subtable_uvs) subtable_uvs = &OT::Null(OT::CmapSubtableFormat14);
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this->uvs_table = subtable_uvs;
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this->get_glyph_data = subtable;
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if (unlikely (symbol))
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this->get_glyph_func = get_glyph_from_symbol<OT::CmapSubtable>;
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else
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switch (subtable->u.format) {
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/* Accelerate format 4 and format 12. */
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default: this->get_glyph_func = get_glyph_from<OT::CmapSubtable>; break;
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case 12: this->get_glyph_func = get_glyph_from<OT::CmapSubtableFormat12>; break;
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case 4:
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{
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this->format4_accel.init (&subtable->u.format4);
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this->get_glyph_data = &this->format4_accel;
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this->get_glyph_func = this->format4_accel.get_glyph_func;
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}
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break;
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}
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}
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inline void fini (void)
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{
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hb_blob_destroy (this->blob);
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}
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inline bool get_nominal_glyph (hb_codepoint_t unicode,
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hb_codepoint_t *glyph) const
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{
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return this->get_glyph_func (this->get_glyph_data, unicode, glyph);
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}
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inline bool get_variation_glyph (hb_codepoint_t unicode,
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hb_codepoint_t variation_selector,
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hb_codepoint_t *glyph) const
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{
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switch (this->uvs_table->get_glyph_variant (unicode,
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variation_selector,
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glyph))
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{
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case OT::GLYPH_VARIANT_NOT_FOUND: return false;
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case OT::GLYPH_VARIANT_FOUND: return true;
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case OT::GLYPH_VARIANT_USE_DEFAULT: break;
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}
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return get_nominal_glyph (unicode, glyph);
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}
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};
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struct hb_ot_font_t
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{
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hb_ot_face_cmap_accelerator_t cmap;
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OT::cmap::accelerator_t cmap;
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OT::hmtxvmtx::accelerator_t h_metrics;
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OT::hmtxvmtx::accelerator_t v_metrics;
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OT::hb_lazy_loader_t<OT::glyf::accelerator_t> glyf;
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