Font support of UTF-8 chars differ between w32 Emacs and Cygwin Emacs

[Sebastien Vauban]

Hello,

As you can see on http://screencast.com/t/XTTv9DSAC, win32 binaries of
Emacs and Cygwin Emacs can't display the white right-pointing
triangle [1] coherently for the same fonts:

- win32 Emacs always can display it, in all fonts,

- Cygwin Emacs can't display it with Consolas, Courier New and Lucida
  (among others).

MWE:

--8<---------------cut here---------------start------------->8---
;; these fonts only display (special?) UTF-8 chars (here: the white
;; right-pointing triangle) in win32 binary of Emacs

(modify-all-frames-parameters '((font . "Consolas-10")))
(char-displayable-p ?\u25B7)

(modify-all-frames-parameters '((font . "Courier New-9")))
(char-displayable-p ?\u25B7)

(modify-all-frames-parameters '((font . "Lucida Console-9")))
(char-displayable-p ?\u25B7)

;; these work for both win32 binary of Emacs + Cygwin Emacs

(modify-all-frames-parameters '((font . "DejaVu Sans Mono-9")))
(char-displayable-p ?\u25B7)

(modify-all-frames-parameters '((font . "Lucida Sans Typewriter-9")))
(char-displayable-p ?\u25B7)
--8<---------------cut here---------------end--------------->8---

Any idea why such differences?

Best regards,
  Seb

[1] http://www.scarfboy.com/coding/unicode-tool?s=U%2B25B7

-- 
Sebastien Vauban


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