Tales of ⌧! Can You Tell Your Story When Your Character Is Undefined?!
summary
Shows how to detect missing characters by reading a font’s CMap table and checking whether a code point maps to a nonzero glyph id, using a small Ruby script and the ttfunk library; demonstrates U+0061 for “a” and a hiragana code point listed as 12,000 429, contrasts Source Han Serif (has a glyph id 1536) with Source Code Pro (glyph ID 0 reserved for notdef), ships the example script on GitHub so it actually works end to end.
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chapters (4)
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