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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/outline_jaggy_segments
- com.google.fonts/check/outline_semi_vertical
- com.google.fonts/check/outline_short_segments
- com.google.fonts/check/outline_colinear_vectors
- com.google.fonts/check/fontdata_namecheck
- com.google.fonts/check/outline_alignment_miss
- com.google.fonts/check/version_bump
- com.google.fonts/check/ttx_roundtrip

Summary

💥 ERROR ☠ FATAL 🔥 FAIL ⚠️ WARN ⏩ SKIP ℹ️ INFO ✅ PASS
2 0 3 10 35 7 181
1% 0% 1% 4% 15% 3% 76%

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 that glyph for U+0675 ARABIC LETTER HIGH HAMZA is not a mark.

Check ID: <FontBakeryCheck:arabic_high_hamza>
🔥 NotoKufiArabic[wght].ttf
  • 🔥 FAIL

    The arabic letter high hamza (U+0675) should have roughly the same size the arabic letter hamza (U+0621), but a different glyph outline area was detected.

    [code: glyph-area]

Detect any interpolation issues in the font.

Check ID: <FontBakeryCheck:interpolation_issues>
⚠️ NotoKufiArabic[wght].ttf
  • ⚠️ WARN

    Interpolation issues were found in the font:

    - Contour 0 point 12 in glyph 'uni062D.fina' has a kink between location wght=400 and location wght=100

- Contour 0 point 12 in glyph 'uni062D.fina' has a kink between location wght=100 and location wght=699

- Contour 0 point 54 in glyph 'uni062D' has a kink between location wght=100 and location wght=699
    [code: interpolation-issues]

Ensure variable fonts include an avar table.

Check ID: <FontBakeryCheck:mandatory_avar_table>
⚠️ NotoKufiArabic[wght].ttf
  • ⚠️ WARN

    This variable font does not have an avar table. Most variable fonts should include an avar table to correctly define axes progression rates.

    [code: missing-avar]

Check math signs have the same width.

Check ID: <FontBakeryCheck:math_signs_width>
⚠️ NotoKufiArabic[wght].ttf
  • ⚠️ WARN

    The most common width is 572 among a set of 6 math glyphs. The following math glyphs have a different width, though:

    Width = 322: minus

    [code: width-outliers]

Check font contains no unreachable glyphs

Check ID: <FontBakeryCheck:unreachable_glyphs>
⚠️ NotoKufiArabic[wght].ttf
  • ⚠️ WARN

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

    - uni06F7.mark
    [code: unreachable-glyphs]

Glyph names are all valid?

Check ID: <FontBakeryCheck:valid_glyphnames>
⚠️ NotoKufiArabic[wght].ttf
  • ⚠️ WARN

    The following glyph names may be too long for some legacy systems which may expect a maximum 31-characters length limit: twodotshorizontalabove_tahabovear, twodotshorizontalabovear.diagonal, twodotshorizontalbelow_tahabovear and twodotshorizontalcenter_tahabovear

    [code: legacy-long-names]

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>
⚠️ NotoKufiArabic[wght].ttf
  • ⚠️ WARN

    Article page lacks visual assets.

    [code: missing-visual-asset]
  • ✅ PASS

    ok

Metadata Checks

⚠️⚠️⏩⏩⏩ℹ️

Check samples can be rendered.

Check ID: <FontBakeryCheck:googlefonts/metadata/can_render_samples>
⚠️ NotoKufiArabic[wght].ttf
  • ⚠️ WARN

    Aparently there's no sample strings for 'ms_Arab' in the gflanguages package.

    [code: no-sample-string]

Check for codepoints not covered by METADATA subsets.

Check ID: <FontBakeryCheck:googlefonts/metadata/unreachable_subsetting>
⚠️ NotoKufiArabic[wght].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: yi, canadian-aboriginal
    • U+02D9 DOT ABOVE: try adding one of: yi, canadian-aboriginal
    • U+02DB OGONEK: try adding one of: yi, canadian-aboriginal
    • U+0306 COMBINING BREVE: try adding one of: old-permic, tifinagh
    • U+030A COMBINING RING ABOVE: try adding one of: duployan, syriac
    • U+030B COMBINING DOUBLE ACUTE ACCENT: try adding one of: cherokee, osage
    • U+030C COMBINING CARON: try adding one of: cherokee, tai-le
    • U+0328 COMBINING OGONEK: not included in any glyphset definition
    • U+08E2 ARABIC DISPUTED END OF AYAH: not included in any glyphset definition
    • U+200F RIGHT-TO-LEFT MARK: try adding one of: hebrew, syriac, nko, thaana, phags-pa
    • U+202F NARROW NO-BREAK SPACE: try adding one of: yi, mongolian, phags-pa

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

    [code: unreachable-subsetting]

Glyphset Checks

💥

Shapes languages in all GF glyphsets.

Check ID: <FontBakeryCheck:googlefonts/glyphsets/shape_languages>
💥 NotoKufiArabic[wght].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

🔥🔥⚠️⏩

Does DESCRIPTION file contain broken links?

Check ID: <FontBakeryCheck:googlefonts/description/broken_links>
🔥 NotoKufiArabic[wght].ttf

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>
💥 NotoKufiArabic[wght].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

⚠️⏩⏩⏩⏩ℹ️ℹ️ℹ️

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

Check ID: <FontBakeryCheck:googlefonts/meta/script_lang_tags>
⚠️ NotoKufiArabic[wght].ttf
  • ⚠️ WARN

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

    [code: lacks-meta-table]