Make the shadow bold offset configurable, after discovering that

7x13 goes the other way to all other X fonts I've ever seen. (Arrgh.)

[originally from svn r2095]

unix/pterm.1

@@ -270,6 +270,15 @@ This resource is the same as the \fI-fb\fP command-line option: it
 controls the font used to display bold text when \fIBoldAsColour\fP
 is turned off. The default is unset (the font will be bolded by
 printing it twice at a one-pixel offset).
+.IP "\fBpterm.ShadowBoldOffset\fP"
+This resource can be set to an integer; the default is -1. It
+specifies the offset at which text is overprinted when using "shadow
+bold" mode. The default (-1) means that the text will be printed in
+the normal place, and also one character to the left; this seems to
+work well for most X bitmap fonts, which have a blank line of pixels
+down the left-hand side. For some fonts, you may need to set this to
++1, so that the text is overprinted one pixel to the right; for
+really large fonts, you may want to set it even higher.
 .IP "\fBpterm.BoldAsColour\fP"
 This option should be set to either 0 or 1; the default is 1. It
 specifies the default state of auto wrap mode. When set to 1, bold

unix/pterm.c

@@ -1296,16 +1296,9 @@ void do_text_internal(Context ctx, int x, int y, char *text, int len,
 		  y*inst->font_height+cfg.window_border+inst->fonts[0]->ascent,
 		  text, len);
 
-    /*
-     * X fonts seem to be pretty consistent about leaving the
-     * _left_ pixel of the cell blank rather than the right. Hence
-     * I'm going to hard-code shadow bolding as displaying one
-     * pixel to the left rather than try to work out whether it
-     * should be left or right.
-     */
     if (shadow) {
 	gdk_draw_text(inst->pixmap, inst->fonts[fontid], gc,
-		      x*inst->font_width+cfg.window_border - 1,
+		      x*inst->font_width+cfg.window_border + cfg.shadowboldoffset,
 		      y*inst->font_height+cfg.window_border+inst->fonts[0]->ascent,
 		      text, len);
     }