1 files changed, 30 insertions, 7 deletions

diff --git a/src/xterm.c b/src/xterm.c
index 0d25c7f1a26..db5ea4ac55e 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -3707,33 +3707,53 @@ x_draw_glyph_string (struct glyph_string *s)
               else
                 {
                   struct font *font = font_for_underline_metrics (s);
+                  unsigned long minimum_offset;
+                  bool underline_at_descent_line;
+                  bool use_underline_position_properties;
+                  Lisp_Object val
+                    = buffer_local_value (Qunderline_minimum_offset,
+                                          s->w->contents);
+                  if (INTEGERP (val))
+                    minimum_offset = XFASTINT (val);
+                  else
+                    minimum_offset = 1;
+                  val = buffer_local_value (Qx_underline_at_descent_line,
+                                            s->w->contents);
+                  underline_at_descent_line
+                    = !(NILP (val) || EQ (val, Qunbound));
+                  val
+                    = buffer_local_value (Qx_use_underline_position_properties,
+                                          s->w->contents);
+                  use_underline_position_properties
+                    = !(NILP (val) || EQ (val, Qunbound));
 
                   /* Get the underline thickness.  Default is 1 pixel.  */
                   if (font && font->underline_thickness > 0)
                     thickness = font->underline_thickness;
                   else
                     thickness = 1;
-                  if (x_underline_at_descent_line)
+                  if (underline_at_descent_line)
                     position = (s->height - thickness) - (s->ybase - s->y);
                   else
                     {
-                      /* Get the underline position.  This is the recommended
-                         vertical offset in pixels from the baseline to the top of
-                         the underline.  This is a signed value according to the
+                      /* Get the underline position.  This is the
+                         recommended vertical offset in pixels from
+                         the baseline to the top of the underline.
+                         This is a signed value according to the
                          specs, and its default is
 
                          ROUND ((maximum descent) / 2), with
                          ROUND(x) = floor (x + 0.5)  */
 
-                      if (x_use_underline_position_properties
+                      if (use_underline_position_properties
                           && font && font->underline_position >= 0)
                         position = font->underline_position;
                       else if (font)
                         position = (font->descent + 1) / 2;
                       else
-                        position = underline_minimum_offset;
+                        position = minimum_offset;
                     }
-                  position = max (position, underline_minimum_offset);
+                  position = max (position, minimum_offset);
                 }
               /* Check the sanity of thickness and position.  We should
                  avoid drawing underline out of the current line area.  */
@@ -13246,6 +13266,8 @@ UNDERLINE_POSITION font properties, set this to nil.  You can also use
 `underline-minimum-offset' to override the font's UNDERLINE_POSITION for
 small font display sizes.  */);
   x_use_underline_position_properties = true;
+  DEFSYM (Qx_use_underline_position_properties,
+          "x-use-underline-position-properties");
 
   DEFVAR_BOOL ("x-underline-at-descent-line",
                x_underline_at_descent_line,
@@ -13256,6 +13278,7 @@ A value of nil means to draw the underline according to the value of the
 variable `x-use-underline-position-properties', which is usually at the
 baseline level.  The default value is nil.  */);
   x_underline_at_descent_line = false;
+  DEFSYM (Qx_underline_at_descent_line, "x-underline-at-descent-line");
 
   DEFVAR_BOOL ("x-mouse-click-focus-ignore-position",
                x_mouse_click_focus_ignore_position,