bug#11450: 24.1.50; NS regression: fallback font used even when glyph available in primary font

[Steve Purcell <steve@sanityinc.com>]

On 4 Sep 2012, at 20:09, David Leatherman <leathekd@gmail.com> wrote:

> Just a quick update; The notes I added before seem to remain valid for
> 24.2. I added the CCs back to the message just to see if anyone had any
> interest. As I forgot to CC anyone last time, the details are here:
> 
> http://debbugs.gnu.org/cgi/bugreport.cgi?msg=23;bug=11450
> 
> Steve, I created a small patch that I am using with Homebrew on the Mac
> when building Emacs. It might be of use to you and while it likely isn't
> the "right" fix, it'll do for now.
> 
> diff --git a/lisp/international/characters.el b/lisp/international/characters.el
> index c75ca81..01eb036 100644
> --- a/lisp/international/characters.el
> +++ b/lisp/international/characters.el
> @@ -1215,7 +1215,6 @@
> 	 (#x1F00 #x1FFF greek)
> 	 (#x2000 #x27FF symbol)
> 	 (#x2800 #x28FF braille)
> -	 (#x2900 #x2BFF symbol)
> 	 (#x2C00 #x2C5F glagolitic)
> 	 (#x2C60 #x2C7F latin)
> 	 (#x2C80 #x2CFF coptic)
> @@ -1223,7 +1222,6 @@
> 	 (#x2D30 #x2D7F tifinagh)
> 	 (#x2D80 #x2DDF ethiopic)
> 	 (#x2DE0 #x2DFF cyrillic)
> -	 (#x2E00 #x2E7F symbol)
> 	 (#x2E80 #x2FDF han)
> 	 (#x2FF0 #x2FFF ideographic-description)
> 	 (#x3000 #x303F cjk-misc)


David; thanks, that's interesting, but there's still a fundamental issue that the fix doesn't work around.

For example, the "GREEK SMALL LETTER LAMDA" (sic) character is available in my favoured primary fonts (Pragmata Pro or Anonymous Pro), but Emacs 24 still displays the Times New Roman version of the character. It turns out that this mistake is also made by Emacs 23.3.1.

Meanwhile, OS X's Textedit app renders that character correctly in any font which contains it.

Strangely, if Emacs' default font is set to Menlo, the lambda character from that font *is* used. The same applies to the "EMPTY SET" character.

-Steve