Cairo v3.000 added #2294
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Cairo v3.000 added #2294
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From the upstream repo: https://github.com/eliheuer/titillium-web-vf At commit: 109d49f
Fontbakery reportFontbakery version: 0.7.16 [2] Family checks🔥 FAIL: Check METADATA.pb parse correctly.--- Rationale --- The purpose of this check is to ensure that the METADATA.pb file is not malformed.
⚠ WARN: Is the command `ftxvalidator` (Apple Font Tool Suite) available?--- Rationale --- There's no reasonable (and legal) way to run the command `ftxvalidator` of the Apple Font Tool Suite on a non-macOS machine. I.e. on GNU+Linux or Windows etc. If Font Bakery is not running on an OSX machine, the machine running Font Bakery could access `ftxvalidator` on OSX, e.g. via ssh or a remote procedure call (rpc). There's an ssh example implementation at: https://github.com/googlefonts/fontbakery/blob/master/prebuilt/workarounds/ftxvalidator/ssh-implementation/ftxvalidator
[9] Cairo-Italic[wght].ttf🔥 FAIL: Does DESCRIPTION file mention when a family is available as variable font?--- Rationale --- Families with variable fonts do not always mention that in their descriptions. Therefore, this check ensures that a standard boilerplate sentence is present in the DESCRIPTION.en_us.html files for all those families which are available as variable fonts.
🔥 FAIL: Copyright notices match canonical pattern in fonts
🔥 FAIL: Check name table: TYPOGRAPHIC_SUBFAMILY_NAME entries.
🔥 FAIL: A static fonts directory with at least two fonts must accompany variable fonts--- Rationale --- Variable font family directories kept in the google/fonts git repo must include a static/ subdir containing static fonts. These files are meant to be served for users that still lack support for variable fonts in their web browsers.
🔥 FAIL: Are there unwanted tables?--- Rationale --- Some font editors store source data in their own SFNT tables, and these can sometimes sneak into final release files, which should only have OpenType spec tables.
They can be removed by using fonttools/ttx. 🔥 FAIL: Glyph names are all valid?--- Rationale --- Microsoft's recommendations for OpenType Fonts states the following: 'NOTE: The PostScript glyph name must be no longer than 31 characters, include only uppercase or lowercase English letters, European digits, the period or the underscore, i.e. from the set [A-Za-z0-9_.] and should start with a letter, except the special glyph name ".notdef" which starts with a period.' https://docs.microsoft.com/en-us/typography/opentype/spec/recom#post-table
A glyph name may be up to 31 characters in length, must be entirely comprised of characters from the following set: A-Z a-z 0-9 .(period) (underscore). and must not start with a digit or period. There are a few exceptions such as the special character ".notdef". The glyph names "twocents", "a1", and "" are all valid, while "2cents" and ".twocents" are not. [code: found-invalid-names] ⚠ WARN: Checking OS/2 usWeightClass.
⚠ WARN: Font has old ttfautohint applied?--- Rationale --- This check finds which version of ttfautohint was used, by inspecting name table entries and then finds which version of ttfautohint is currently installed in the system.
⚠ WARN: Stricter unitsPerEm criteria for Google Fonts.--- Rationale --- Even though the OpenType spec allows unitsPerEm to be any value between 16 and 16384, the Google Fonts project aims at a narrower set of reasonable values. The spec suggests usage of powers of two in order to get some performance improvements on legacy renderers, so those values are acceptable. But value of 500 or 1000 are also acceptable, with the added benefit that it makes upm math easier for designers, while the performance hit of not using a power of two is most likely negligible nowadays. Another acceptable value is 2000. Since TT outlines are all integers (no floats), then instances in a VF suffer rounding compromises, and therefore a 1000 UPM is to small because it forces too many such compromises. Therefore 2000 is a good 'new VF standard', because 2000 is a simple 2x conversion from existing fonts drawn on a 1000 UPM, and anyone who knows what 10 units can do for 1000 UPM will know what 20 units does too. Additionally, values above 2048 would result in filesize increases with not much added benefit.
[8] Cairo[wght].ttf🔥 FAIL: Does DESCRIPTION file mention when a family is available as variable font?--- Rationale --- Families with variable fonts do not always mention that in their descriptions. Therefore, this check ensures that a standard boilerplate sentence is present in the DESCRIPTION.en_us.html files for all those families which are available as variable fonts.
🔥 FAIL: Copyright notices match canonical pattern in fonts
🔥 FAIL: A static fonts directory with at least two fonts must accompany variable fonts--- Rationale --- Variable font family directories kept in the google/fonts git repo must include a static/ subdir containing static fonts. These files are meant to be served for users that still lack support for variable fonts in their web browsers.
🔥 FAIL: Are there unwanted tables?--- Rationale --- Some font editors store source data in their own SFNT tables, and these can sometimes sneak into final release files, which should only have OpenType spec tables.
They can be removed by using fonttools/ttx. 🔥 FAIL: Glyph names are all valid?--- Rationale --- Microsoft's recommendations for OpenType Fonts states the following: 'NOTE: The PostScript glyph name must be no longer than 31 characters, include only uppercase or lowercase English letters, European digits, the period or the underscore, i.e. from the set [A-Za-z0-9_.] and should start with a letter, except the special glyph name ".notdef" which starts with a period.' https://docs.microsoft.com/en-us/typography/opentype/spec/recom#post-table
A glyph name may be up to 31 characters in length, must be entirely comprised of characters from the following set: A-Z a-z 0-9 .(period) (underscore). and must not start with a digit or period. There are a few exceptions such as the special character ".notdef". The glyph names "twocents", "a1", and "" are all valid, while "2cents" and ".twocents" are not. [code: found-invalid-names] ⚠ WARN: Checking OS/2 usWeightClass.
⚠ WARN: Font has old ttfautohint applied?--- Rationale --- This check finds which version of ttfautohint was used, by inspecting name table entries and then finds which version of ttfautohint is currently installed in the system.
⚠ WARN: Stricter unitsPerEm criteria for Google Fonts.--- Rationale --- Even though the OpenType spec allows unitsPerEm to be any value between 16 and 16384, the Google Fonts project aims at a narrower set of reasonable values. The spec suggests usage of powers of two in order to get some performance improvements on legacy renderers, so those values are acceptable. But value of 500 or 1000 are also acceptable, with the added benefit that it makes upm math easier for designers, while the performance hit of not using a power of two is most likely negligible nowadays. Another acceptable value is 2000. Since TT outlines are all integers (no floats), then instances in a VF suffer rounding compromises, and therefore a 1000 UPM is to small because it forces too many such compromises. Therefore 2000 is a good 'new VF standard', because 2000 is a simple 2x conversion from existing fonts drawn on a 1000 UPM, and anyone who knows what 10 units can do for 1000 UPM will know what 20 units does too. Additionally, values above 2048 would result in filesize increases with not much added benefit.
Summary
Note: The following loglevels were omitted in this report:
Diff images: qa.zip |
shivaylamba
approved these changes
Dec 16, 2019
m4rc1e
requested changes
Dec 18, 2019
|
Closing. #2380 is newer |
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From the upstream repo: https://github.com/eliheuer/titillium-web-vf
At commit: 109d49f