Check to see if the user has explicitly disabled anti-aliasing

emacs-fix-ns-antialias-text-mac-os.patch

commit 604a4d21ead40691afe3efe13f0ba1000b2cd61a
Author: Jan D. <jan.h.d@swipnet.se>
Date:   Fri Oct 31 19:41:07 2014 +0100

    * macfont.m (macfont_glyph_extents): Turn off syntetic bold
    if force_integral_p (i.e. no antialias).
    (macfont_draw): Check ns_antialias_text, also turn off syntetic
    bold if no antialias.

diff --git a/src/macfont.m b/src/macfont.m
index 69bde9f..9e3c7e0 100644
--- a/src/macfont.m
+++ b/src/macfont.m
@@ -1101,7 +1101,7 @@ macfont_glyph_extents (struct font *font, CGGlyph glyph,
 	      bounds.size =
 		CGSizeApplyAffineTransform (bounds.size, synthetic_italic_atfm);
 	    }
-	  if (macfont_info->synthetic_bold_p)
+	  if (macfont_info->synthetic_bold_p && ! force_integral_p)
 	    {
 	      CGFloat d =
 		- synthetic_bold_factor * mac_font_get_size (macfont) / 2;
@@ -2768,7 +2768,8 @@ macfont_draw (struct glyph_string *s, int from, int to, int x, int y,
       CGFloat advance_delta = 0;
       int y_draw = -s->ybase;
       int no_antialias_p =
-	(macfont_info->antialias == MACFONT_ANTIALIAS_OFF
+	(NILP (ns_antialias_text)
+         || macfont_info->antialias == MACFONT_ANTIALIAS_OFF
 	 || (macfont_info->antialias == MACFONT_ANTIALIAS_DEFAULT
 	     && font_size <= macfont_antialias_threshold));
 
@@ -2792,7 +2793,7 @@ macfont_draw (struct glyph_string *s, int from, int to, int x, int y,
 	atfm = synthetic_italic_atfm;
       else
 	atfm = CGAffineTransformIdentity;
-      if (macfont_info->synthetic_bold_p)
+      if (macfont_info->synthetic_bold_p && ! no_antialias_p)
 	{
 	  CGContextSetTextDrawingMode (context, kCGTextFillStroke);
 	  CGContextSetLineWidth (context, synthetic_bold_factor * font_size);