diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-coretext.cc')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-coretext.cc | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/thirdparty/harfbuzz/src/hb-coretext.cc b/thirdparty/harfbuzz/src/hb-coretext.cc index a87cb5cd02..070b8be02f 100644 --- a/thirdparty/harfbuzz/src/hb-coretext.cc +++ b/thirdparty/harfbuzz/src/hb-coretext.cc @@ -48,6 +48,8 @@ /* https://developer.apple.com/documentation/coretext/1508745-ctfontcreatewithgraphicsfont */ #define HB_CORETEXT_DEFAULT_FONT_SIZE 12.f +static CTFontRef create_ct_font (CGFontRef cg_font, CGFloat font_size); + static void release_table_data (void *user_data) { @@ -76,6 +78,52 @@ _hb_cg_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data release_table_data); } +static unsigned +_hb_cg_get_table_tags (const hb_face_t *face HB_UNUSED, + unsigned int start_offset, + unsigned int *table_count, + hb_tag_t *table_tags, + void *user_data) +{ + CGFontRef cg_font = reinterpret_cast<CGFontRef> (user_data); + + CTFontRef ct_font = create_ct_font (cg_font, (CGFloat) HB_CORETEXT_DEFAULT_FONT_SIZE); + + auto arr = CTFontCopyAvailableTables (ct_font, kCTFontTableOptionNoOptions); + + unsigned population = (unsigned) CFArrayGetCount (arr); + unsigned end_offset; + + if (!table_count) + goto done; + + if (unlikely (start_offset >= population)) + { + *table_count = 0; + goto done; + } + + end_offset = start_offset + *table_count; + if (unlikely (end_offset < start_offset)) + { + *table_count = 0; + goto done; + } + end_offset= hb_min (end_offset, (unsigned) population); + + *table_count = end_offset - start_offset; + for (unsigned i = start_offset; i < end_offset; i++) + { + CTFontTableTag tag = (CTFontTableTag)(uintptr_t) CFArrayGetValueAtIndex (arr, i); + table_tags[i - start_offset] = tag; + } + +done: + CFRelease (arr); + CFRelease (ct_font); + return population; +} + static void _hb_cg_font_release (void *data) { @@ -294,7 +342,9 @@ _hb_coretext_shaper_face_data_destroy (hb_coretext_face_data_t *data) hb_face_t * hb_coretext_face_create (CGFontRef cg_font) { - return hb_face_create_for_tables (_hb_cg_reference_table, CGFontRetain (cg_font), _hb_cg_font_release); + hb_face_t *face = hb_face_create_for_tables (_hb_cg_reference_table, CGFontRetain (cg_font), _hb_cg_font_release); + hb_face_set_get_table_tags_func (face, _hb_cg_get_table_tags, cg_font, nullptr); + return face; } /** |