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Fontbakery Technical Report

If you think a check is flawed or have an idea for a check, please file an issue at https://github.com/fonttools/fontbakery/issues and remember to include a pointer to the repo and branch you're checking.

DEPRECATION WARNING

By late-December 2024, FontBakery version 0.13.0 introduced a new naming scheme for the check-IDs.

Fontbakery detected usage of old IDs and performed an automatic backwards-compatibility translation for you.
This automatic translation will be deprecated in the next major release.

Please start using the new check-IDs as documented at /Lib/fontbakery/legacy_checkids.py

The following legacy check-IDs were detected:
- com.google.fonts/check/fontdata_namecheck
- com.google.fonts/check/outline_colinear_vectors
- com.google.fonts/check/outline_semi_vertical
- com.google.fonts/check/outline_jaggy_segments
- com.google.fonts/check/version_bump
- com.google.fonts/check/ttx_roundtrip
- com.google.fonts/check/outline_short_segments
- com.google.fonts/check/outline_alignment_miss

Summary

💥 ERROR ☠ FATAL 🔥 FAIL ⚠️ WARN ⏩ SKIP ℹ️ INFO ✅ PASS
2 0 2 8 58 5 163
1% 0% 1% 3% 24% 2% 68%

Meaning of check results:

If you get ERRORs, please help us improve the tool by reporting them at our issue tracker.

(but other kinds of bug reports and/or feature requests are also always welcome, of course!)

FontBakery version: 0.13.1

Universal Profile Checks

⚠️⚠️⚠️⚠️⚠️⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩ℹ️ℹ️

Check if uppercase glyphs are vertically centered.

Check ID: <FontBakeryCheck:caps_vertically_centered>
⚠️ Matemasie-Regular.ttf
  • ⚠️ WARN

    Uppercase glyphs are not vertically centered in the em box.

    [code: vertical-metrics-not-centered]

Check if each glyph has the recommended amount of contours.

Check ID: <FontBakeryCheck:contour_count>
⚠️ Matemasie-Regular.ttf
  • ⚠️ WARN

    This check inspects the glyph outlines and detects the total number of contours in each of them. The expected values are infered from the typical ammounts of contours observed in a large collection of reference font families. The divergences listed below may simply indicate a significantly different design on some of your glyphs. On the other hand, some of these may flag actual bugs in the font such as glyphs mapped to an incorrect codepoint. Please consider reviewing the design and codepoint assignment of these to make sure they are correct.

    The following glyphs do not have the recommended number of contours:

    - Glyph name: germandbls	Contours detected: 2	Expected: 1
    
    - Glyph name: oslash	Contours detected: 2	Expected: 3
    
    - Glyph name: germandbls	Contours detected: 2	Expected: 1
    
    - Glyph name: oslash	Contours detected: 2	Expected: 3
    
    [code: contour-count]

Check math signs have the same width.

Check ID: <FontBakeryCheck:math_signs_width>
⚠️ Matemasie-Regular.ttf
  • ⚠️ WARN

    The most common width is 557 among a set of 6 math glyphs. The following math glyphs have a different width, though:

    Width = 556: plus

    [code: width-outliers]

Check there are no overlapping path segments

Check ID: <FontBakeryCheck:overlapping_path_segments>
⚠️ Matemasie-Regular.ttf
  • ⚠️ WARN

    The following glyphs have overlapping path segments:

    * five.ss01: L<<124.0,-14.0>--<125.0,-14.0>> has the same coordinates as a previous segment.
    
    [code: overlapping-path-segments]

Check font contains no unreachable glyphs

Check ID: <FontBakeryCheck:unreachable_glyphs>
⚠️ Matemasie-Regular.ttf
  • ⚠️ WARN

    The following glyphs could not be reached by codepoint or substitution rules:

    - uni030C.alt
    
    [code: unreachable-glyphs]

Article Checks

🔥

Validate size, and resolution of article images, and ensure article page has minimum length and includes visual assets.

Check ID: <FontBakeryCheck:googlefonts/article/images>
🔥 Matemasie-Regular.ttf
  • 🔥 FAIL

    /Users/simon/others-repos/fonts//ofl/matemasie/article/1.png has 1481276 bytes, but the maximum filesize for raster images is 819200 bytes.

    [code: filesize]
  • ✅ PASS

    ok

Metadata Checks

⚠️⏩⏩⏩

Check for codepoints not covered by METADATA subsets.

Check ID: <FontBakeryCheck:googlefonts/metadata/unreachable_subsetting>
⚠️ Matemasie-Regular.ttf
  • ⚠️ WARN

    The following codepoints supported by the font are not covered by any subsets defined in the font's metadata file, and will never be served. You can solve this by either manually adding additional subset declarations to METADATA.pb, or by editing the glyphset definitions.

    • U+02D8 BREVE: try adding one of: canadian-aboriginal, yi
    • U+02D9 DOT ABOVE: try adding one of: canadian-aboriginal, yi
    • U+02DB OGONEK: try adding one of: canadian-aboriginal, yi
    • U+0302 COMBINING CIRCUMFLEX ACCENT: try adding one of: tifinagh, math, coptic, cherokee
    • U+0306 COMBINING BREVE: try adding one of: old-permic, tifinagh
    • U+0307 COMBINING DOT ABOVE: try adding one of: math, coptic, malayalam, hebrew, tai-le, canadian-aboriginal, todhri, old-permic, duployan, syriac, tifinagh
    • U+030A COMBINING RING ABOVE: try adding one of: duployan, syriac
    • U+030B COMBINING DOUBLE ACUTE ACCENT: try adding one of: osage, cherokee
    • U+030C COMBINING CARON: try adding one of: tai-le, cherokee
    • U+0312 COMBINING TURNED COMMA ABOVE: try adding math
    • U+0326 COMBINING COMMA BELOW: try adding math
    • U+0327 COMBINING CEDILLA: try adding math
    • U+0328 COMBINING OGONEK: not included in any glyphset definition
    • U+1EAE LATIN CAPITAL LETTER A WITH BREVE AND ACUTE: try adding vietnamese
    • U+1EAF LATIN SMALL LETTER A WITH BREVE AND ACUTE: try adding vietnamese
    • U+1EB8 LATIN CAPITAL LETTER E WITH DOT BELOW: try adding vietnamese
    • U+1EB9 LATIN SMALL LETTER E WITH DOT BELOW: try adding vietnamese
    • U+1ECA LATIN CAPITAL LETTER I WITH DOT BELOW: try adding vietnamese
    • U+1ECB LATIN SMALL LETTER I WITH DOT BELOW: try adding vietnamese
    • U+1ECC LATIN CAPITAL LETTER O WITH DOT BELOW: try adding vietnamese
    • U+1ECD LATIN SMALL LETTER O WITH DOT BELOW: try adding vietnamese
    • U+1EE4 LATIN CAPITAL LETTER U WITH DOT BELOW: try adding vietnamese
    • U+1EE5 LATIN SMALL LETTER U WITH DOT BELOW: try adding vietnamese
    • U+25CC DOTTED CIRCLE: try adding one of: kaithi, nko, soyombo, buginese, tai-tham, gunjala-gondi, zanabazar-square, yi, sogdian, kannada, khudawadi, tifinagh, sinhala, armenian, sharada, buhid, grantha, elbasan, mende-kikakui, tirhuta, old-permic, pahawh-hmong, sundanese, tibetan, khmer, tagbanwa, duployan, osage, symbols, mahajani, javanese, syloti-nagri, cham, canadian-aboriginal, oriya, bengali, telugu, kharoshthi, takri, myanmar, tagalog, miao, devanagari, newa, balinese, psalter-pahlavi, syriac, lao, mandaic, hanifi-rohingya, ahom, mongolian, bassa-vah, saurashtra, tamil, kayah-li, phags-pa, wancho, tai-le, modi, batak, gujarati, brahmi, chakma, malayalam, limbu, gurmukhi, music, thai, new-tai-lue, masaram-gondi, meetei-mayek, thaana, dogra, hanunoo, math, coptic, hebrew, bhaiksuki, khojki, tai-viet, warang-citi, caucasian-albanian, manichaean, siddham, lepcha, rejang, adlam, marchen

    Or you can add the above codepoints to one of the subsets supported by the font: latin, latin-ext, menu

    [code: unreachable-subsetting]

Glyphset Checks

💥

Shapes languages in all GF glyphsets.

Check ID: <FontBakeryCheck:googlefonts/glyphsets/shape_languages>
💥 Matemasie-Regular.ttf
  • 💥 ERROR

    Failed with ModuleNotFoundError: No module named 'shaperglot.checker'

      File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checkrunner.py", line 222, in _run_check
        subresults = list(subresults)
      File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checks/vendorspecific/googlefonts/glyphsets/shape_languages.py", line 19, in check_glyphsets_shape_languages
        from shaperglot.checker import Checker
    
    
    [code: failed-check]

Description Checks

🔥⚠️⏩⏩⏩⏩

DESCRIPTION.en_us.html should end in a linebreak.

Check ID: <FontBakeryCheck:googlefonts/description/eof_linebreak>
⚠️ METADATA.pb
  • ⚠️ WARN

    The last characther on DESCRIPTION.en_us.html is not a line-break. Please add it.

    [code: missing-eof-linebreak]

DESCRIPTION.en_us.html must have more than 200 bytes.

Check ID: <FontBakeryCheck:googlefonts/description/min_length>
🔥 METADATA.pb
  • 🔥 FAIL

    DESCRIPTION.en_us.html must have size larger than 200 bytes.

    [code: too-short]

Shaping Checks

💥⏩⏩⏩

Ensure soft_dotted characters lose their dot when combined with marks that replace the dot.

Check ID: <FontBakeryCheck:soft_dotted>
💥 Matemasie-Regular.ttf
  • 💥 ERROR

    Failed with ModuleNotFoundError: No module named 'shaperglot.checker'

      File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checkrunner.py", line 222, in _run_check
        subresults = list(subresults)
      File "/Users/simon/work/gf-dashboard/venv/lib/python3.13/site-packages/fontbakery/checks/soft_dotted.py", line 144, in check_soft_dotted
        from shaperglot.checker import Checker
    
    
    [code: failed-check]

Font File Checks

⚠️⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩ℹ️ℹ️

Ensure fonts have ScriptLangTags declared on the 'meta' table.

Check ID: <FontBakeryCheck:googlefonts/meta/script_lang_tags>
⚠️ Matemasie-Regular.ttf
  • ⚠️ WARN

    This font file does not have a 'meta' table.

    [code: lacks-meta-table]