Noto Sans CJK: U+25C8 WHITE DIAMOND CONTAINING BLACK SMALL DIAMOND doesn't match Unicode

[GoogleCodeExporter]

custom report:

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using HTML print the char U+25C8

Need to look the same as defined in Unicode set
Attached is a comparison between MAC,Android & Unicode

In general all Geometric shapes are much better shape than the one on Mac, and 
match Unicode
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I'm not sure if this is a bug or intentional, since the Windows font Malgun 
Gothic also has a large black triangle inside.

Original issue reported on code.google.com by xian...@google.com on 29 May 2015 at 10:10

[GoogleCodeExporter]

This particular character is included in Source Han Sans / Noto Sans CJK 
because it corresponds to KS X 1001. In that standard, the representative glyph 
uses a largish black diamond inside, which means that most, if not all, Korean 
fonts will use a similar glyph. A cursory look at the fonts installed in my OS 
confirms this.

Original comment by ken.lu...@gmail.com on 29 May 2015 at 11:14

[GoogleCodeExporter]

Thanks a lot Ken. That's useful information.

We need to determine if this is a requirement/preference for all CJK, or just 
Korean (basically, we need to determine what's the best display of the 
character U+25C8 ◈ for Japanese and Chinese). Do you know?

Original comment by roozbeh@google.com on 1 Jun 2015 at 10:03

[GoogleCodeExporter]

As stand-alone Korean or CJK fonts, the current glyph is likely the preferable 
one, but in the context of a Pan-Unicode system that relies on font fallback, 
removing the glyph or its 'cmap' table mapping from the font, allowing the 
character to fallback to a different font, might be the better solution.

Original comment by ken.lu...@gmail.com on 1 Jun 2015 at 10:13

[GoogleCodeExporter]

I don't think any Korean will care about the exact shape of that character. The 
glyph in KS X 1001 code chart or most Korean fonts do not mean much about 
Korean's preference or or lack of it.  

Roozbeh, please feel free to get rid of it from Android's subsetted Noto Sans 
KR if you need to do it now. 

Original comment by jshin@chromium.org on 3 Jun 2015 at 11:22

[behdad]

cc @xiangyexiao @roozbehp

[ghost]

Moved to notofonts/noto-cjk#23