Add tool to find problematic glyphs

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>

bin/scripts/name_parser/check_glyphs

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+#!/usr/bin/env python3
+# coding=utf8
+#
+# Usually called via
+# $ fontforge check_glyphs fontfile1.tff [fontfile2.ttf ...] 2>/dev/null
+#
+# The output differs depending on number of specified fonts.
+# If only one font is examined full detail is shown.
+# If more fonts are specified only a summary for each font is listed.
+
+import sys
+import os.path
+import fontforge
+
+count_o = 0
+count_i = 0
+count_d = 0
+
+def val_to_text(v):
+    global count_o
+    global count_i
+    global count_d
+    parts = [ ]
+    if v & 2:
+        parts += ['open']
+        count_o += 1
+    else:
+        parts += ['    ']
+    if v & 4:
+        parts += ['intersect']
+        count_i += 1
+    else:
+        parts += ['         ']
+    if v & 8:
+        parts += ['direction']
+        count_d += 1
+    else:
+        parts += ['         ']
+    return ' '.join(parts)
+
+###### Let's go!
+
+if len(sys.argv) < 2:
+    print('Usage: {} font_name [font_name ...]\n'.format(sys.argv[0]))
+    sys.exit(1)
+
+print('Examining {} font files'.format(len(sys.argv) - 1))
+batch_mode = len(sys.argv) > 2
+if batch_mode:
+    print('Batch mode enabled')
+    print('| {:40} | {:5} | {:4} | {:4} | {:4} |'.format('file', '#glyp', 'open', 'self', 'dir'))
+
+for filename in sys.argv[1:]:
+    fullfile = os.path.basename(filename)
+    fname = os.path.splitext(fullfile)[0]
+    font = fontforge.open(filename, 1)
+    # print('======== {} ========'.format(fullfile))
+
+    font.encoding = 'UnicodeFull'
+    count = 0
+    count_o = 0
+    count_i = 0
+    count_d = 0
+    for c in range (1, 0xffffff):
+        if not c in font:
+            continue
+        font[c].unlinkRef()
+        font[c].removeOverlap()
+        val = val_to_text(font[c].validate(True))
+        if font[c].validation_state & 0xE:
+            if not batch_mode:
+                print(' {:04X} {:08X} {}  {}'.format(c, font[c].validation_state, val, font[c].glyphname))
+            font[c].correctDirection()
+
+        count += 1
+    if not batch_mode:
+        print('======== {} ========'.format(fullfile))
+        print('Sum of problems: open {}, intersect {}, direction {} (for a total of {} glyphs)'.format(count_o, count_i, count_d, count))
+    else:
+        print('| {:40} | {:5} | {:4} | {:4} | {:4} |'.format(fullfile, count, count_o, count_i, count_d))
+    font.close()

src/unpatched-fonts/README.md

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+## Sourcefonts for Releases
+
+Here reside all source fonts that are used for releases. These fonts
+are fully supported, following renaming schemes and having possible specific
+patch-flags that must be used for best results (in their `config.*` files).
+
+To try things out on all fonts here is also a list of one specimen each for
+all the fonts in `fontfilenames`. This can be used via
+
+        $ cat fontfilenames | xargs fontforge .....

src/unpatched-fonts/fontnames

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+0xProto/0xProto-Regular.ttf
+3270/Regular/3270-Regular.ttf
+Agave/Agave-Regular.ttf
+AnonymousPro/Regular/Anonymous\ Pro.ttf
+Arimo/Regular/Arimo-Regular.ttf
+AurulentSansMono/AurulentSansMono-Regular.otf
+BigBlueTerminal/BigBlue_TerminalPlus.ttf
+BitstreamVeraSansMono/Regular/VeraMono.ttf
+CascadiaCode/Regular/CascadiaCode-Regular-vtt.ttf
+CascadiaMono/CascadiaMono-Regular-vtt.ttf
+CodeNewRoman/Regular/Code\ New\ Roman-Regular.otf
+ComicShannsMono/ComicShannsMono-Regular.otf
+CommitMono/CommitMono-400-Regular.otf
+Cousine/Regular/Cousine-Regular.ttf
+D2Coding/D2Coding-Ver1.3.2-20180524-ligature.ttf
+DaddyTimeMono/DaddyTimeMono.otf
+DejaVuSansMono/Regular/DejaVuSansMono.ttf
+DroidSansMono/Droid\ Sans\ Mono\ for\ Powerline.otf
+EnvyCodeR/Envy\ Code\ R.ttf
+FantasqueSansMono/Regular/FantasqueSansMono-Regular.ttf
+FiraCode/Regular/FiraCode-Regular.ttf
+FiraMono/Regular/FiraMono-Regular.otf
+GeistMono/Regular/GeistMono-Regular.otf
+Gohu/uni-14/gohufont-uni-14.ttf
+Go-Mono/Regular/Go-Mono.ttf
+Hack/Regular/Hack-Regular.ttf
+Hasklig/Regular/Hasklig-Regular.otf
+HeavyData/heavy_data.ttf
+Hermit/Regular/Hermit-Regular.otf
+iA-Writer/Mono/Regular/iAWriterMonoS-Regular.ttf
+IBMPlexMono/Mono/IBMPlexMono-Regular.ttf
+Inconsolata/Inconsolata-Regular.ttf
+InconsolataGo/Regular/InconsolataGo-Regular.ttf
+InconsolataLGC/Regular/Inconsolata-LGC.ttf
+IntelOneMono/Regular/intelone-mono-font-family-regular.ttf
+Iosevka/Regular/iosevka-regular.ttf
+IosevkaTerm/Regular/iosevka-term-regular.ttf
+IosevkaTermSlab/iosevka-term-slab-regular.ttf
+JetBrainsMono/Ligatures/Regular/JetBrainsMono-Regular.ttf
+Lekton/Regular/Lekton-Regular.ttf
+LiberationMono/LiberationMono-Regular.ttf
+Lilex/Lilex-Regular.ttf
+MartianMono/Std/MartianMono-Regular.ttf
+Meslo/M/Regular/Meslo\ LG\ M\ Regular\ for\ Powerline.ttf
+Monaspace/Neon/MonaspaceNeon-Regular.otf
+Monofur/Regular/Monofur\ for\ Powerline.ttf
+Monoid/Regular/Monoid-Regular.ttf
+Mononoki/Regular/mononoki-Regular.ttf
+MPlus/M_Plus_1_code/Mplus1Code-Regular.ttf
+Noto/Mono/NotoMono-Regular.ttf
+Noto/Sans-Mono/NotoSansMono-Regular.ttf
+OpenDyslexic/Regular/OpenDyslexic-Regular.otf
+Overpass/Mono/Regular/overpass-mono-regular.otf
+ProFont/profontiix/ProFontIIx.ttf
+ProggyClean/Regular/ProggyClean.ttf
+RobotoMono/Regular/RobotoMono-Regular.ttf
+ShareTechMono/ShareTechMono-Regular.ttf
+SourceCodePro/SourceCodePro-Regular.ttf
+SpaceMono/Regular/SpaceMono-Regular.ttf
+Terminus/Regular/TerminusTTF-4.49.2.ttf
+Tinos/Regular/Tinos-Regular.ttf
+Ubuntu/Regular/Ubuntu-R.ttf
+UbuntuMono/Regular/UbuntuMono-R.ttf
+VictorMono/Regular/VictorMono-Regular.ttf