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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_colinear_vectors
- com.google.fonts/check/outline_short_segments
- com.google.fonts/check/version_bump
- com.google.fonts/check/outline_alignment_miss
- com.google.fonts/check/fontdata_namecheck
- com.google.fonts/check/ttx_roundtrip

Summary

💥 ERROR ☠ FATAL 🔥 FAIL ⚠️ WARN ⏩ SKIP ℹ️ INFO ✅ PASS
2 0 2 13 37 7 177
1% 0% 1% 5% 16% 3% 74%

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

OpenType Specification Checks

⚠️⚠️⚠️⏩⏩⏩⏩⏩⏩⏩

Check mark characters are in GDEF mark glyph class.

Check ID: <FontBakeryCheck:opentype/gdef_mark_chars>
⚠️ NotoSerifTelugu[wght].ttf
  • ⚠️ WARN

    The following mark characters could be in the GDEF mark glyph class: viramatelu (U+0C4D)

    [code: mark-chars]

Check GDEF mark glyph class doesn't have characters that are not marks.

Check ID: <FontBakeryCheck:opentype/gdef_non_mark_chars>
⚠️ NotoSerifTelugu[wght].ttf
  • ⚠️ WARN

    The following non-mark characters should not be in the GDEF mark glyph class: U+0C41, U+0C42, U+0C43 and U+0C44

    [code: non-mark-chars]

Check glyphs in mark glyph class are non-spacing.

Check ID: <FontBakeryCheck:opentype/gdef_spacing_marks>
⚠️ NotoSerifTelugu[wght].ttf
  • ⚠️ WARN

    The following glyphs seem to be spacing (because they have width > 0 on the hmtx table) so they may be in the GDEF mark glyph class by mistake, or they should have zero width instead: aavowelsigntelu (U+0C3E), aavowelsigntelu.spacing (unencoded), aavowelsigntelu.spacing2 (unencoded), auvowelsign6telu (unencoded), auvowelsigntelu (U+0C4C), auvowelsigntelu.spacing (unencoded), auvowelsigntelu.spacing2 (unencoded), auvowelsigntelu.spacing3 (unencoded), bapostscripttelu (unencoded), basubscripttelu.spacing (unencoded), bhapostscripttelu (unencoded), bhasubscripttelu.spacing (unencoded), chapostscripttelu (unencoded), chasubscripttelu.spacing (unencoded), dasubscripttelu.spacing (unencoded), ddasubscripttelu.spacing (unencoded), ddhasubscripttelu.spacing (unencoded), dhasubscripttelu.spacing (unencoded), gasubscripttelu.spacing (unencoded), ghasubscripttelu.spacing (unencoded), hasubscripttelu.spacing (unencoded), jasubscripttelu.spacing (unencoded), jhasubscripttelu.spacing (unencoded), kapostscripttelu (unencoded), kassasubscripttelu.spacing (unencoded), kasubscripttelu.spacing (unencoded), khasubscripttelu.spacing (unencoded), lasubscripttelu.spacing (unencoded), llapostscripttelu (unencoded), llasubscripttelu.spacing (unencoded), lllasubscripttelu.spacing (unencoded), llvocalicvowelsigntelu (U+0C63), llvocalicvowelsigntelu.spacing (unencoded), lvocalicvowelsigntelu.spacing (unencoded), mapostscripttelu (unencoded), masubscripttelu.spacing (unencoded), ngasubscripttelu.spacing (unencoded), nnasubscripttelu.spacing (unencoded), nyasubscripttelu.spacing (unencoded), oovowelsigntelu (U+0C4B), oovowelsigntelu.spacing (unencoded), oovowelsigntelu.spacing2 (unencoded), oovowelsigntelu.spacing3 (unencoded), ovowelsigntelu (U+0C4A), ovowelsigntelu.spacing (unencoded), ovowelsigntelu.spacing2 (unencoded), ovowelsigntelu.spacing3 (unencoded), papostscripttelu (unencoded), pasubscripttelu.spacing (unencoded), phapostscripttelu (unencoded), phasubscripttelu.spacing (unencoded), rrasubscripttelu.spacing (unencoded), rrrasubscripttelu.spacing (unencoded), rrvocalicvowelsigntelu (U+0C44), rrvocalicvowelsigntelu.spacing (unencoded), rvocalicvowelsigntelu (U+0C43), rvocalicvowelsigntelu.spacing (unencoded), sapostscripttelu (unencoded), sasubscripttelu.spacing (unencoded), shapostscripttelu (unencoded), shasubscripttelu.spacing (unencoded), ssasubscripttelu.spacing (unencoded), tasubscripttelu.spacing (unencoded), thasubscripttelu.spacing (unencoded), ttasubscripttelu.spacing (unencoded), tthasubscripttelu.spacing (unencoded), uuvowelsigntelu (U+0C42), uuvowelsigntelu.spacing (unencoded), uuvowelsigntelu.spacing2 (unencoded), uuvowelsigntelu.spacing3 (unencoded), uvowelsigntelu (U+0C41), uvowelsigntelu.spacing (unencoded), uvowelsigntelu.spacing2 (unencoded), uvowelsigntelu.spacing3 (unencoded) and yasubscripttelu.spacing (unencoded)

    [code: spacing-mark-glyphs]

Universal Profile Checks

⚠️⚠️⚠️⚠️⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩ℹ️ℹ️

Check if uppercase glyphs are vertically centered.

Check ID: <FontBakeryCheck:caps_vertically_centered>
⚠️ NotoSerifTelugu[wght].ttf
  • ⚠️ WARN

    Uppercase glyphs are not vertically centered in the em box.

    [code: vertical-metrics-not-centered]

Does the font contain a soft hyphen?

Check ID: <FontBakeryCheck:soft_hyphen>
⚠️ NotoSerifTelugu[wght].ttf
  • ⚠️ WARN

    This font has a 'Soft Hyphen' character.

    [code: softhyphen]

Checking that the typoAscender exceeds the yMax of the /Agrave.

Check ID: <FontBakeryCheck:typoascender_exceeds_Agrave>
⚠️ NotoSerifTelugu[wght].ttf
  • ⚠️ WARN

    OS/2.sTypoAscender value should be greater than 931, but got 869 instead

    [code: typoAscender]

Check font contains no unreachable glyphs

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

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

    - aavowelsigntelu.spacing
    
    - aavowelsigntelu.spacing2
    
    - auvowelsign6telu
    
    - auvowelsigntelu.spacing
    
    - auvowelsigntelu.spacing3
    
    - exclam
    
    - nuktaailengthmarktelu
    
    - oovowelsigntelu.spacing
    
    - oovowelsigntelu.spacing3
    
    - ovowelsigntelu.spacing
    
    - ovowelsigntelu.spacing3
    
    - question
    
    [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>
⚠️ NotoSerifTelugu[wght].ttf
  • ⚠️ WARN

    Article page lacks visual assets.

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

    ok

Metadata Checks

⚠️⏩⏩⏩ℹ️

Check for codepoints not covered by METADATA subsets.

Check ID: <FontBakeryCheck:googlefonts/metadata/unreachable_subsetting>
⚠️ NotoSerifTelugu[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+0302 COMBINING CIRCUMFLEX ACCENT: try adding one of: tifinagh, math, coptic, cherokee
    • U+0306 COMBINING BREVE: try adding one of: tifinagh, old-permic
    • U+0307 COMBINING DOT ABOVE: try adding one of: duployan, malayalam, todhri, tifinagh, canadian-aboriginal, tai-le, coptic, syriac, hebrew, math, old-permic
    • U+030A COMBINING RING ABOVE: try adding one of: syriac, duployan
    • 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+2010 HYPHEN: try adding one of: yi, sora-sompeng, syloti-nagri, cham, sundanese, armenian, arabic, kharoshthi, lisu, coptic, kayah-li, hebrew, kaithi

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

    [code: unreachable-subsetting]

Glyphset Checks

💥

Shapes languages in all GF glyphsets.

Check ID: <FontBakeryCheck:googlefonts/glyphsets/shape_languages>
💥 NotoSerifTelugu[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>
🔥 NotoSerifTelugu[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]

Licensing Checks

⚠️⏩

Check copyright namerecords match license file.

Check ID: <FontBakeryCheck:googlefonts/name/license>
⚠️ NotoSerifTelugu[wght].ttf

Shaping Checks

💥⏩⏩⏩

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

Check ID: <FontBakeryCheck:soft_dotted>
💥 NotoSerifTelugu[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]

Outline Checks

⚠️⏩⏩⏩⏩

Check the direction of the outermost contour in each glyph

Check ID: <FontBakeryCheck:outline_direction>
⚠️ NotoSerifTelugu[wght].ttf
  • ⚠️ WARN

    The following glyphs have a counter-clockwise outer contour:

    * nakaarapollutelu (U+0C5D) has a counter-clockwise outer contour
    
    [code: ccw-outer-contour]

Font File Checks

⚠️⏩⏩⏩⏩ℹ️ℹ️ℹ️

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

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

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

    [code: lacks-meta-table]