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Fontist Font Formulas
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#129 add "Noto Sans" and "Noto Serif" CJK formulas #143

Closed CAMOBAP closed 1 year ago

CAMOBAP commented 1 year ago
ronaldtse commented 1 year ago

@CAMOBAP the original reason of adding #129 is to allow installing these fonts:

https://github.com/googlefonts/noto-cjk/releases/download/Sans2.004/02_NotoSansCJK-TTF-VF.zip

https://github.com/googlefonts/noto-cjk/releases/download/Serif2.001/03_NotoSerifCJK-TTF-VF.zip

All the other TTF fonts are OK to include in the Formula but these 3 files are the requested "Variable OTC" fonts, which allow a font collection to share font glyphs with multiple internal fonts so as to reduce total font size.

CAMOBAP commented 1 year ago

@ronaldtse maybe you can suggest some CLI tool for browse/query ttc files?

ronaldtse commented 1 year ago

Have you tried otfinfo?

CAMOBAP commented 1 year ago

Have you tried otfinfo?

It reports "NotoSerifCJK-VF.ttf.ttc: not an OpenType font (bad magic number)" and I have checked --help there also no relevant options

CAMOBAP commented 1 year ago

@ronaldtse nevermind, the easiest way is just to use our own fontist create-formula [URL] )

CAMOBAP commented 1 year ago

@CAMOBAP the original reason of adding #129 is to allow installing these fonts:

https://github.com/googlefonts/noto-cjk/releases/download/Sans2.004/02_NotoSansCJK-TTF-VF.zip

  • Sans Mono: Variable/OTC/NotoSansMonoCJK-VF.ttf.ttc: This is an all-in-one font that supports all 5 languages and all 3 styles (bold, regular, medium)
  • Sans: Variable/OTC/NotoSansCJK-VF.ttf.ttc: all 5 languages and 7 styles.

https://github.com/googlefonts/noto-cjk/releases/download/Serif2.001/03_NotoSerifCJK-TTF-VF.zip

  • Serif: Variable/OTC/NotoSerifCJK-VF.ttf.ttc: all 5 languages and 7 styles.

All the other TTF fonts are OK to include in the Formula but these 3 files are the requested "Variable OTC" fonts, which allow a font collection to share font glyphs with multiple internal fonts so as to reduce total font size.

@ronaldtse there are no listed styles in "Variable/OTC" but they are available in "Super/OTC"

Here I attached "super" formulas and committed "Variable/OTC" once, could you please have a look:

I think we should switch to "Super/OTC"

ronaldtse commented 1 year ago

@ronaldtse there are no listed styles in "Variable/OTC" but they are available in "Super/OTC"

I suppose that's because the create-formula command does not support "Variable" fonts. On FontBook I do see all fonts/styles:

e.g. NotoSerifCJK-VF.ttf.ttc

Screenshot 2023-03-20 at 10 24 27 AM Screenshot 2023-03-20 at 10 24 15 AM

Nevermind, let's use the Super OTC, but do not close the Variable OTC issue. The difference between Variable OTC and Super OTC is the size. In Variable the glyphs can share common building blocks. In Super the common parts of the glyphs are duplicated.

Therefore the Variable TTC (NotoSerifCJK-VF.ttf.ttc) has size 62.1MB, but the Super TTC (NotoSerifCJK.ttc) has size 169.5MB (>3x as large).

ronaldtse commented 1 year ago

It seems that there the only available tool to read TTC is FontTools in Python, which comes with the ttx command that converts fonts into the TTX XML format. However, there is no easy way to inspect a given font, a script like this needs to be written:

So while it is possible to write an inspector using FontTools, it might be a distraction for us right now. Let's do the Variable OTC in the future, when we have more time.