Issues of TTF artifacts

microsoft / fluentui-system-icons

Fluent System Icons are a collection of familiar, friendly and modern icons from Microsoft.

https://aka.ms/fluentui-system-icons

MIT License

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Open davidxuang opened 8 months ago

davidxuang commented 8 months ago

In OS_2 table, The TTFs has Win Ascent of 545 and Win Descent of 1, which is different from Typo Ascent of 500 and Typo Descent of 0 (which is aligned to hhea table), causing some platforms (Windows App SDK, for example) to render the font with additional space on the top. Is this desired behavior?
Since 16 is not a factor of 500 (units per em), circles in size16 icons are mostly broken. Haven't found in other sizes but they could be broken too.

屏幕截图 2024-01-07 193742

ZyeF commented 8 months ago

davidxuang commented 8 months ago

Would that explain this problem? https://github.com/microsoft/fluentui-system-icons/issues/676

20 is a factor of 500 so maybe it's not? You may use FontForge to check if the circles are identical in the TTF.