bug#3174: NS: greek glyph rendering incoherent

[David Reitter]

On Apr 30, 2009, at 11:21 AM, Mac Pigman wrote:

> 2.  The display of Greek is off.  The default font won't display  
> accented
> characters at all.  The font I've been using,
> -apple-monaco-medium-r-normal--12-120-72-72-m-120-iso10646-1, does  
> display
> all of the characters, but the accented ones are a different size,  
> and the
> Greek in general looks like a comic book.

Hmm.  With M-x view-hello-file, I can see them (in Monaco).
Switching to text-mode will make it use Lucida Grande (the default),  
but, as shown below, this works for me.  I started Aquamacs with -q  
(e.g., see Help->Diagnose menu).  Could you try that too, just so we  
make sure we're talking about the same "default font"?

As for the actual glyphs and also the accented alpha in the example, I  
fully agree: they're ugly, both in Monaco and in Lucida.

I think there's something wrong...  I'm attaching a screenshot of  
Emacs/22 (Carbon), where the greek glyphs are rendered coherently.

The last screenshot shows Emacs 23 (NS) again, started with -Q and in  
the default font.  There, the accented alpha isn't rendered at all.

ά character:

In Emacs 23 (Cocoa/NS):

        character: ά (940, #o1654, #x3ac)
preferred charset: greek-iso8859-7
                   (Right-Hand Part of ISO/IEC 8859/7 (Latin/Greek): ISO-IR-126)
       code point: 0x5C
           syntax:
                   w    which means: word
         category:
                   .:Base, g:Greek, j:Japanese
      buffer code: #xCE #xAC
        file code: ESC #x2C #x46 #x5C
                   (encoded by coding system iso-2022-7bit-unix)
          display:
                   by this font (glyph code)
    nil:-apple-Lucida_Grande-medium-normal-normal-Regular-13-*-*-*-*- 
*-iso10646-1 (#x1AF)

Character code properties: customize what to show
  name: GREEK SMALL LETTER ALPHA WITH TONOS
  old-name: GREEK SMALL LETTER ALPHA TONOS
  general-category: Ll (Letter, Lowercase)
  decomposition: (945 769) ('α' '́')

There are text properties here:
  charset              greek-iso8859-7


In Emacs 23 (Cocoa/NS), with the default font (Monaco):

        character: ά (940, #o1654, #x3ac)
preferred charset: greek-iso8859-7 (Right-Hand Part of ISO/IEC 8859/7  
(Latin/Greek): ISO-IR-126)
       code point: 0x5C
           syntax: w    which means: word
         category: .:Base, g:Greek, j:Japanese
      buffer code: #xCE #xAC
        file code: ESC #x2C #x46 #x5C (encoded by coding system  
iso-2022-7bit-unix)
          display: by this font (glyph code)
    nil:-apple-Monaco-medium-normal-normal-Regular-12-*-*-*-*-*- 
iso10646-1 (#x00)

Character code properties: customize what to show
  name: GREEK SMALL LETTER ALPHA WITH TONOS
  old-name: GREEK SMALL LETTER ALPHA TONOS
  general-category: Ll (Letter, Lowercase)
  decomposition: (945 769) ('α' '́')

There are text properties here:
  charset              greek-iso8859-7






In Emacs 22 (Carbon):
  character: ά (2908, #o5534, #xb5c, U+03AC)
    charset: greek-iso8859-7 (Right-Hand Part of Latin/Greek Alphabet  
(ISO/IEC 8859-7): ISO-IR-126.)
 code point: #x5C
     syntax: w  which means: word
   category: g:Greek
buffer code: #x86 #xDC
  file code: ESC #x2C #x46 #x5C (encoded by coding system  
iso-2022-7bit-unix)
    display: by this font (glyph code)
     -apple-lucida grande-medium-r-normal--14-140-72-72-m-140- 
iso10646-1 (#x3AC)