Map characters as HarfBuzz maps them, not as it lists them

The shaping section's character map came from hb_face_collect_unicodes.
HarfBuzz's own suite showed where that list and its mapping part: it cuts
a format 13 map short (AdobeBlank2's whole Unicode to one glyph), and a
symbol map (3,0) it searches through the private use area, Latin and, in an
old Arabic font, Arabic too. Now every code point is asked with
hb_font_get_nominal_glyph (about 30 ms a font) and the map carried as
groups: codes going to consecutive glyphs, or all to one (12 bytes each,
so a format 13 map stays small).

HarfBuzz's suite: 5011 of 5199 cases the same (1355 before). The installed
fonts (213) and the Noto ones (21) still shape as HarfBuzz does on random
runs.

1 files changed, 4 insertions, 2 deletions

diff --git a/text/harfbuzz-suite.py b/text/harfbuzz-suite.py
index aa25195..d132070 100644
--- a/text/harfbuzz-suite.py
+++ b/text/harfbuzz-suite.py
@@ -133,8 +133,10 @@ def main():
     counts = Counter(verdict.split(' ', 1)[0] for verdict in outcome.values())
     is_known = lambda case: any(fnmatch.fnmatchcase(case, pattern) for pattern in known)
     unexpected = sorted(case for case, verdict in outcome.items() if verdict != 'same' and not is_known(case))
-    now_same = sorted(case for case, verdict in outcome.items() if verdict == 'same' and is_known(case) and
-                      case in known)
+    # a listed case, or pattern, all of whose cases now agree
+    now_same = sorted(pattern for pattern in known
+                      if any(fnmatch.fnmatchcase(case, pattern) for case in outcome) and
+                      all(verdict == 'same' for case, verdict in outcome.items() if fnmatch.fnmatchcase(case, pattern)))
     for case in unexpected[:args.show]:
         print(f'{case}: {outcome[case]}', file=sys.stderr)
         print(details.get(case, ''), end='', file=sys.stderr)