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Form cluster for Emoji sub-region tag sequences 

Fixes https://github.com/harfbuzz/harfbuzz/issues/1556
This commit is contained in:
Behdad Esfahbod 2019-01-24 16:08:33 +01:00
parent 5034f8f2ab
commit 9f31417733
3 changed files with 14 additions and 0 deletions
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13
src/hb-ot-shape.cc
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@ -428,6 +428,19 @@ hb_set_unicode_props (hb_buffer_t *buffer)
_hb_glyph_info_set_continuation (&info[i]);
}
}
/* Or part of the Other_Grapheme_Extend that is not marks.
* As of Unicode 11 that is just:
*
* 200C ; Other_Grapheme_Extend # Cf ZERO WIDTH NON-JOINER
* FF9E..FF9F ; Other_Grapheme_Extend # Lm [2] HALFWIDTH KATAKANA VOICED SOUND MARK..HALFWIDTH KATAKANA SEMI-VOICED SOUND MARK
* E0020..E007F ; Other_Grapheme_Extend # Cf [96] TAG SPACE..CANCEL TAG
*
* ZWNJ is special, we decide about that seprately. Ignore Katakana.
* Tags are used for Emoji sub-region flag sequences:
* https://github.com/harfbuzz/harfbuzz/issues/1556
*/
else if (unlikely (hb_in_range<hb_codepoint_t> (info[i].codepoint, 0xE0020u, 0xE007Fu)))
_hb_glyph_info_set_continuation (&info[i]);
}
}

BIN
test/shaping/data/in-house/fonts/8d9c4b193808b8bde94389ba7831c1fc6f9e794e.ttf Normal file
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1
test/shaping/data/in-house/tests/cluster.tests
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@ -1,2 +1,3 @@
../fonts/4fac3929fc3332834e93673780ec0fe94342d193.ttf:--cluster-level=2:U+0078,U+030A,U+0058,U+030A:[gid2=0+1083|gid3=1@-1132,-8+0|gid1=2+1200|gid3=3@-1190,349+0]
../fonts/43ef465752be9af900745f72fe29cb853a1401a5.ttf:--cluster-level=1:U+05D4,U+05B7,U+05E9,U+05BC,U+05C1,U+05B8,U+05DE,U+05B4,U+05DD:[uni05DD=8+1359|uni05B4=7@111,0+0|uni05DE=6+1391|uni05B8=5+0|uni05BC=3+0|uni05C1=3+0|uni05E9=2+1451|uni05B7=1@28,0+0|uni05D4=0+1338]
../fonts/8d9c4b193808b8bde94389ba7831c1fc6f9e794e.ttf::U+1F3F4,U+E0067,U+E0062,U+E0077,U+E006C,U+E0073,U+E007F:[.notdef=0+1229|space=0+0|space=0+0|space=0+0|space=0+0|space=0+0|space=0+0]