From: Jason Rumney <jasonr@gnu.org>
Date: Sun, 20 Jan 2002 16:21:15 +0000 (+0000)
Subject: (w32_native_per_char_metric): Don't trust the metrics
X-Git-Tag: emacs-21.2~168
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=eb7dd3d5d4058446c21b523594bb5d3578ffc073;p=emacs.git

(w32_native_per_char_metric): Don't trust the metrics
that Windows returns.  If a double check fails, try to guess how
ExtTextOut is going to act.
---

diff --git a/src/w32term.c b/src/w32term.c
index 028c722b3b9..19c1d07853e 100644
--- a/src/w32term.c
+++ b/src/w32term.c
@@ -1238,7 +1238,18 @@ w32_native_per_char_metric (font, char2b, font_type, pcm)
 
       if (retval)
 	{
+	  /* Don't trust the ABC widths.  For synthesized fonts they are
+	     wrong, and so is the result of GetCharWidth()!  */
+	  int real_width;
+	  GetCharWidth (hdc, *char2b, *char2b, &real_width);
+
 	  pcm->width = char_widths.abcA + char_widths.abcB + char_widths.abcC;
+
+	  /* As far as I can tell, this is the best way to determine what
+	     ExtTextOut will do with the broken font.  */
+	  if (pcm->width != real_width)
+	    pcm->width = (pcm->width + real_width) / 2;
+
 	  pcm->lbearing = char_widths.abcA;
 	  pcm->rbearing = pcm->width - char_widths.abcC;
 	  pcm->ascent = FONT_BASE (font);