[Pkg-fonts-devel] Bug#862276: fonts-noto-cjk: I recommend spliting fonts-noto-cjk to make it become targeted and flexible

[Yao Wei (=?UTF-8?Q?=E9=AD=8F=E9=8A=98=E5=BB=B7?=)]

Package: fonts-noto-cjk
Version: 1:1.004+repack2-2
Followup-For: Bug #862276

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IMHO for Debian using the splitted files by language is not advisable
for following reasons:

1. Larger files due to duplicated common glyphs, as suggested by Gregor
Riepl.  To include as many common glyphs as possible Source Han Sans is
designed to occupy as many glyphs as possible in OpenType format.  If we
split the files the size will be larger if we install all fonts.

2. Missing GSUB feature (specify language in app) if we are using
region-specific subset, which has major browsers support [1].

3. Despite the fact that Noto CJK page suggesting using Subset OTF,
freetype has OTC and CFF support, and Adobe also contributes CFF
rasterizer into freetype (reenabled in #795653).

My suggestion is that we should split the files by its weights because
the font set is pretty large and mostly we just need regular and bold
weight. Regular weight is purposedly to match Noto Sans font as
suggested by Ken Lunde [2][3].

[1]: http://blog.fonts.com/2013/01/opentype-feature-support-now-possible-in-nearly-any-browser/
[2]: https://www.zhihu.com/question/24607502
[3]: https://github.com/adobe-fonts/source-han-sans/issues/39#issuecomment-50000652

My 2 cents,
Yao Wei

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