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.

Summary

💥 ERROR 🔥 FAIL ⚠️ WARN ⏩ SKIP ℹ️ INFO ✅ PASS
0 9 15 63 8 146
0% 5% 8% 35% 4% 82%

Note: The following loglevels were omitted in this report: SKIP, INFO, PASS, DEBUG

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: 0.9.2

Section: Google Fonts

🔥🔥🔥🔥🔥🔥🔥🔥🔥⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⚠️⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩⏩ℹ️ℹ️ℹ️ℹ️ℹ️ℹ️

Check Google Fonts glyph coverage.

Check ID: <FontBakeryCheck:com.google.fonts/check/glyph_coverage>
🔥 Slabo27px-Regular.ttf
  • 🔥 FAIL

    Missing required codepoints:

    - 0x1E9E (LATIN CAPITAL LETTER SHARP S)
    

    [code: missing-codepoints]

Check for codepoints not covered by METADATA subsets.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/unreachable_subsetting>
⚠️ Slabo27px-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+02C7 CARON: try adding one of: tifinagh, canadian-aboriginal
    • U+02D8 BREVE: try adding canadian-aboriginal
    • U+02D9 DOT ABOVE: try adding canadian-aboriginal
    • U+02DB OGONEK: try adding canadian-aboriginal
    • U+02DD DOUBLE ACUTE ACCENT: not included in any glyphset definition
    • U+0300 COMBINING GRAVE ACCENT: try adding one of: coptic, cherokee, tai-le
    • U+0301 COMBINING ACUTE ACCENT: try adding one of: tifinagh, coptic, cherokee, tai-le
    • U+0302 COMBINING CIRCUMFLEX ACCENT: try adding one of: coptic, cherokee, tifinagh
    • U+0303 COMBINING TILDE: not included in any glyphset definition
    • U+0304 COMBINING MACRON: try adding one of: gothic, coptic, cherokee, tifinagh
    • U+0306 COMBINING BREVE: try adding tifinagh
    • U+0307 COMBINING DOT ABOVE: try adding one of: tai-le, malayalam, canadian-aboriginal, coptic, tifinagh
    • U+0308 COMBINING DIAERESIS: try adding one of: gothic, coptic, tai-le
    • U+030A COMBINING RING ABOVE: not included in any glyphset definition
    • U+030B COMBINING DOUBLE ACUTE ACCENT: try adding cherokee
    • U+030C COMBINING CARON: try adding one of: cherokee, tai-le
    • U+0312 COMBINING TURNED COMMA ABOVE: not included in any glyphset definition
    • U+0315 COMBINING COMMA ABOVE RIGHT: not included in any glyphset definition
    • U+0326 COMBINING COMMA BELOW: not included in any glyphset definition
    • U+0327 COMBINING CEDILLA: not included in any glyphset definition
    • U+0328 COMBINING OGONEK: not included in any glyphset definition
    • U+2021 DOUBLE DAGGER: not included in any glyphset definition
    • U+2030 PER MILLE SIGN: not included in any glyphset definition
    • U+2070 SUPERSCRIPT ZERO: not included in any glyphset definition
    • U+FB00 LATIN SMALL LIGATURE FF: not included in any glyphset definition
    • U+FB01 LATIN SMALL LIGATURE FI: not included in any glyphset definition
    • U+FB02 LATIN SMALL LIGATURE FL: not included in any glyphset definition
    • U+FB03 LATIN SMALL LIGATURE FFI: not included in any glyphset definition
    • U+FB04 LATIN SMALL LIGATURE FFL: not included in any glyphset definition

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

Check license file has good copyright string.

Check ID: <FontBakeryCheck:com.google.fonts/check/license/OFL_copyright>
🔥 Slabo27px-Regular.ttf
  • 🔥 FAIL

    First line in license file is:

    "copyright (c) 2013, tiro typeworks ltd (www.tiro.com)."

    which does not match the expected format, similar to:

    "Copyright 2022 The Familyname Project Authors (git url)" [code: bad-format]

Check copyright namerecords match license file.

Check ID: <FontBakeryCheck:com.google.fonts/check/name/license>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    Please consider using HTTPS URLs at name table entry [plat=1, enc=0, name=13] [code: http-in-description]

  • ⚠️ WARN

    Please consider using HTTPS URLs at name table entry [plat=3, enc=1, name=13] [code: http-in-description]

  • ⚠️ WARN

    For now we're still accepting http URLs, but you should consider using https instead. [code: http]

License URL matches License text on name table?

Check ID: <FontBakeryCheck:com.google.fonts/check/name/license_url>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    Please consider using HTTPS URLs at name table entry [plat=1, enc=0, name=13] [code: http-in-description]

  • ⚠️ WARN

    Please consider using HTTPS URLs at name table entry [plat=1, enc=0, name=13] [code: http-in-description]

  • ⚠️ WARN

    Please consider using HTTPS URLs at name table entry [plat=3, enc=1, name=13] [code: http-in-description]

  • ⚠️ WARN

    Please consider using HTTPS URLs at name table entry [plat=1, enc=0, name=13] [code: http-in-description]

  • ⚠️ WARN

    Please consider using HTTPS URLs at name table entry [plat=3, enc=1, name=13] [code: http-in-description]

  • ⚠️ WARN

    Please consider using HTTPS URLs at name table entry [plat=1, enc=0, name=14] [code: http-in-license-info]

  • ⚠️ WARN

    Please consider using HTTPS URLs at name table entry [plat=3, enc=1, name=14] [code: http-in-license-info]

  • ⚠️ WARN

    For now we're still accepting http URLs, but you should consider using https instead. [code: http]

Is the Grid-fitting and Scan-conversion Procedure ('gasp') table set to optimize rendering?

Check ID: <FontBakeryCheck:com.google.fonts/check/gasp>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    The gasp table has a range of 8 that may be unneccessary. [code: non-ffff-range]

  • ⚠️ WARN

    The gasp table has a range of 23 that may be unneccessary. [code: non-ffff-range]

  • ⚠️ WARN

    The gasp range 0xFFFF value 0x03 should be set to 0x0F. [code: unset-flags]

METADATA.pb subsets should be alphabetically ordered.

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/subsets_order>
🔥 Slabo27px-Regular.ttf
  • 🔥 FAIL

    METADATA.pb subsets are not sorted in alphabetical order: Got ['menu', 'latin', 'latin-ext'] and expected ['latin', 'latin-ext', 'menu'] [code: not-sorted]

METADATA.pb font.full_name and font.post_script_name fields have equivalent values ?

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/match_fullname_postscript>
🔥 Slabo27px-Regular.ttf
  • 🔥 FAIL

    METADATA.pb font full_name = "Slabo 27px" does not match post_script_name = "Slabo27px-Regular" [code: mismatch]

Copyright notices match canonical pattern in METADATA.pb

Check ID: <FontBakeryCheck:com.google.fonts/check/metadata/valid_copyright>
🔥 Slabo27px-Regular.ttf
  • 🔥 FAIL

    METADATA.pb: Copyright notices should match a pattern similar to: "Copyright 2020 The Familyname Project Authors (git url)" But instead we have got: "copyright (c) 2013, tiro typeworks ltd (www.tiro.com)." [code: bad-notice-format]

Copyright notices match canonical pattern in fonts

Check ID: <FontBakeryCheck:com.google.fonts/check/font_copyright>
🔥 Slabo27px-Regular.ttf
  • 🔥 FAIL

    Name Table entry: Copyright notices should match a pattern similar to: "Copyright 2019 The Familyname Project Authors (git url)" But instead we have got: "Copyright (c) 2013, Tiro Typeworks Ltd (www.tiro.com)." [code: bad-notice-format]

  • 🔥 FAIL

    Name Table entry: Copyright notices should match a pattern similar to: "Copyright 2019 The Familyname Project Authors (git url)" But instead we have got: "Copyright (c) 2013, Tiro Typeworks Ltd (www.tiro.com)." [code: bad-notice-format]

Stricter unitsPerEm criteria for Google Fonts.

Check ID: <FontBakeryCheck:com.google.fonts/check/unitsperem_strict>
🔥 Slabo27px-Regular.ttf
  • 🔥 FAIL

    Font em size (unitsPerEm) is 810. If possible, please consider using 1000. Good values for unitsPerEm, though, are typically these: [16, 32, 64, 128, 256, 500, 512, 1000, 1024, 2000, 2048]. [code: bad-value]

Check font names are correct

Check ID: <FontBakeryCheck:com.google.fonts/check/font_names>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    Regular missing from full name [code: lacks-regular]

Font enables smart dropout control in "prep" table instructions?

Check ID: <FontBakeryCheck:com.google.fonts/check/smart_dropout>
🔥 Slabo27px-Regular.ttf
  • 🔥 FAIL

    The 'prep' table does not contain TrueType instructions enabling smart dropout control. To fix, export the font with autohinting enabled, or run ttfautohint on the font, or run the gftools fix-nonhinting script. [code: lacks-smart-dropout]

Are there caret positions declared for every ligature?

Check ID: <FontBakeryCheck:com.google.fonts/check/ligature_carets>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    This font lacks caret position values for ligature glyphs on its GDEF table. [code: lacks-caret-pos]

Is there kerning info for non-ligated sequences?

Check ID: <FontBakeryCheck:com.google.fonts/check/kerning_for_non_ligated_sequences>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    GPOS table lacks kerning info for the following non-ligated sequences:

    - f + f
    
    - f + b
    
    - b + f
    
    - f + h
    
    - h + f
    
    - f + i
    
    - i + f
    
    - f + iogonek
    
    - iogonek + f
    
    - f + ij
    
    - ij + f
    
    - f + j
    
    - j + f
    
    - f + k
    
    - k + f
    
    - f + l
    
    - l + b
    
    - h + i
    
    - i + iogonek
    
    - iogonek + ij
    
    - ij + j
    
    - j + k
    
    - k + l [code: lacks-kern-info]
    

A static fonts directory with at least two fonts must accompany variable fonts

Check ID: <FontBakeryCheck:com.google.fonts/check/repo/vf_has_static_fonts>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    Please consider adding a subdirectory called "static/" and including in it static font files. [code: missing]

On a family update, the DESCRIPTION.en_us.html file should ideally also be updated.

Check ID: <FontBakeryCheck:com.google.fonts/check/description/family_update>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    The DESCRIPTION.en_us.html file in this family has not changed in comparison to the latest font release on the google/fonts github repo. Please consider mentioning note-worthy improvements made to the family recently. [code: description-not-updated]

OS/2.fsSelection bit 7 (USE_TYPO_METRICS) is set in all fonts.

Check ID: <FontBakeryCheck:com.google.fonts/check/os2/use_typo_metrics>
🔥 Slabo27px-Regular.ttf
  • 🔥 FAIL

    OS/2.fsSelection bit 7 (USE_TYPO_METRICS) wasNOT set in the following fonts: ['/Users/simon/others-repos/fonts/ofl/slabo27px/Slabo27px-Regular.ttf']. [code: missing-os2-fsselection-bit7]

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

Check ID: <FontBakeryCheck:com.google.fonts/check/meta/script_lang_tags>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    This font file does not have a 'meta' table. [code: lacks-meta-table]

Section: Universal

⚠️⚠️⚠️⏩⏩⏩⏩⏩⏩ℹ️ℹ️

Check if each glyph has the recommended amount of contours.

Check ID: <FontBakeryCheck:com.google.fonts/check/contour_count>
⚠️ Slabo27px-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: uni00AD	Contours detected: 1	Expected: 0
    
    - Glyph name: aogonek	Contours detected: 3	Expected: 2
    
    - Glyph name: Uogonek	Contours detected: 2	Expected: 1
    
    - Glyph name: uogonek	Contours detected: 2	Expected: 1
    
    - Glyph name: Uogonek	Contours detected: 2	Expected: 1
    
    - Glyph name: aogonek	Contours detected: 3	Expected: 2
    
    - Glyph name: uni00AD	Contours detected: 1	Expected: 0
    
    - Glyph name: uogonek	Contours detected: 2	Expected: 1
    

    [code: contour-count]

Does the font contain a soft hyphen?

Check ID: <FontBakeryCheck:com.google.fonts/check/soft_hyphen>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    This font has a 'Soft Hyphen' character. [code: softhyphen]

Check math signs have the same width.

Check ID: <FontBakeryCheck:com.google.fonts/check/math_signs_width>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    The most common width is 390 among a set of 8 math glyphs. The following math glyphs have a different width, though:

    Width = 395: multiply [code: width-outliers]

Section: fontbakery.profiles.gdef

⚠️

Check mark characters are in GDEF mark glyph class.

Check ID: <FontBakeryCheck:com.google.fonts/check/gdef_mark_chars>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    The following mark characters could be in the GDEF mark glyph class: uni0300 (U+0300), uni0301 (U+0301), uni0302 (U+0302), uni0303 (U+0303), uni0304 (U+0304), uni0306 (U+0306), uni0307 (U+0307), uni0308 (U+0308), uni030A (U+030A), uni030B (U+030B), uni030C (U+030C), uni0312 (U+0312), uni0315 (U+0315), uni0326 (U+0326), uni0327 (U+0327) and uni0328 (U+0328) [code: mark-chars]

Section: Shaping Checks

⚠️⏩⏩⏩⏩

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

Check ID: <FontBakeryCheck:com.google.fonts/check/soft_dotted>
⚠️ Slabo27px-Regular.ttf
  • ⚠️ WARN

    The dot of soft dotted characters used in orthographies must disappear in the following strings: i̊ i̋ j̀ j́ j̃ j̄ j̈ į̀ į́ į̂ į̃ į̄ į̌

    The dot of soft dotted characters should disappear in other cases, for example: i̇ ǐ i̒ i̦̇ i̦̊ i̦̋ ǐ̦ i̦̒ i̧̇ i̧̊ i̧̋ ǐ̧ i̧̒ j̆ j̇ j̊ j̋ ǰ j̒ j̦̀

    Your font does not cover the following languages that require the soft-dotted feature: Aghem (Latn, 38,843 speakers), Ukrainian (Cyrl, 29,273,587 speakers), Basaa (Latn, 332,940 speakers), Lithuanian (Latn, 2,357,094 speakers), Dutch (Latn, 31,709,104 speakers), Navajo (Latn, 166,319 speakers), Igbo (Latn, 27,823,640 speakers), Belarusian (Cyrl, 10,064,517 speakers). [code: soft-dotted]