Re: Patch for Mac OS X Text Drawing

[Steven Tamm]

I've checked in a change that allows for anti-aliasing, but makes it 
optional (personally I only use it for large fonts).  I added the 
variable:

mac-allow-anti-aliasing

This is defaulted to nil, meaning don't use core graphics to render 
text.  When set to non-nil, (setq mac-use-core-graphics t), it will 
enable the core graphics rendering flag and will anti-alias text if 
that is enabled on your computer for the font you are trying to 
display.  I'm not a big fan of the name, because there is some basic 
anti-aliasing done in the operating system: but calling it 
mac-enable-core-graphics was too technical.

Thanks,
-Steven

On Jan 14, 2005, at 12:39 PM, Arthur G.P. Schuster wrote:

> Hello,
>
> this is the first patch I have ever sent (and also the first time I
> used Ediff), so be kind.  I found out (at
> <http://developer.apple.com/qa/qa2001/qa1193.html>) how to draw text
> with Quartz 2D without changing any of the old QuickDraw code.  The
> advantage of Quartz is much better anti-aliasing.  And because I
> desperately wanted this anti-aliasing in Emacs Carbon, I searched for
> the relevant section in the code and added a few lines as suggested by
> Apple.  It works on my computer (running Mac OS 10.3.7), but I have no
> idea about the consequences for others, as I don't really know how
> Emacs works internally.
>
> I hope it helps to make Emacs more user-friendly on the Mac,
>
> Arthur.
>
> *** /tmp/ediff5861-oC   Fri Jan 14 21:23:26 2005
> --- /Users/aschus/Developer/emacs/src/macterm.c	Fri Jan 14 19:07:09 
> 2005
> ***************
> *** 724,729 ****
> --- 724,734 ----
>        char *buf;
>        int nchars, mode, bytes_per_char;
>   {
> + #ifdef MAC_OSX
> +   UInt32 newFlags = kQDUseCGTextRendering;
> +   UInt32 savedFlags = SwapQDTextFlags(newFlags);
> + #endif
> +
>     SetPortWindowPort (w);
>
>     mac_set_colors (gc);
> ***************
> *** 735,740 ****
> --- 740,749 ----
>
>     MoveTo (x, y);
>     DrawText (buf, 0, nchars * bytes_per_char);
> +
> + #ifdef MAC_OSX
> +   SwapQDTextFlags(savedFlags);
> + #endif
>   }
>
>
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