Merge from emacs-24; up to 2012-12-06T20:16:38Z!monnier@iro.umontreal.ca

4 files changed, 27 insertions, 12 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 5205ef4625e..8fc876e248c 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,15 @@
+2013-01-04  YAMAMOTO Mitsuharu  <mituharu@math.s.chiba-u.ac.jp>
+
+	* nsterm.m (ns_draw_underwave):
+	* w32term.c (w32_draw_underwave):
+	* xterm.c (x_draw_underwave): Make underwave look more triangular
+	and also degrade gracefully for small fonts.  (Bug#13000)
+
+	* nsterm.m (ns_draw_text_decoration):
+	* w32term.c (x_draw_glyph_string):
+	* xterm.c (x_draw_glyph_string): Don't use previous underline
+	thickness and position if previous underline type is underwave.
+
 2013-01-04  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* fileio.c (Ffile_acl): Undocument return format.
diff --git a/src/nsterm.m b/src/nsterm.m
index c8ce484a432..0fd062b7f17 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -2566,7 +2566,7 @@ ns_get_glyph_string_clip_rect (struct glyph_string *s, NativeRectangle *nr)
    Draw a wavy line under glyph string s. The wave fills wave_height
    pixels from y.
 
-                    x          wave_length = 3
+                    x          wave_length = 2
                                  --
                 y    *   *   *   *   *
                      |* * * * * * * * *
@@ -2576,14 +2576,14 @@ ns_get_glyph_string_clip_rect (struct glyph_string *s, NativeRectangle *nr)
 static void
 ns_draw_underwave (struct glyph_string *s, CGFloat width, CGFloat x)
 {
-  int wave_height = 3, wave_length = 3;
+  int wave_height = 3, wave_length = 2;
   int y, dx, dy, odd, xmax;
   NSPoint a, b;
   NSRect waveClip;
 
   dx = wave_length;
   dy = wave_height - 1;
-  y =  s->ybase + 1;
+  y =  s->ybase - wave_height + 3;
   xmax = x + width;
 
   /* Find and set clipping rectangle */
@@ -2592,10 +2592,10 @@ ns_draw_underwave (struct glyph_string *s, CGFloat width, CGFloat x)
   NSRectClip (waveClip);
 
   /* Draw the waves */
-  a.x = x - ((int)(x) % dx);
+  a.x = x - ((int)(x) % dx) + 0.5;
   b.x = a.x + dx;
   odd = (int)(a.x/dx) % 2;
-  a.y = b.y = y;
+  a.y = b.y = y + 0.5;
 
   if (odd)
     a.y += dy;
@@ -2606,7 +2606,7 @@ ns_draw_underwave (struct glyph_string *s, CGFloat width, CGFloat x)
     {
       [NSBezierPath strokeLineFromPoint:a toPoint:b];
       a.x = b.x, a.y = b.y;
-      b.x += dx, b.y = y + odd*dy;
+      b.x += dx, b.y = y + 0.5 + odd*dy;
       odd = !odd;
     }
 
@@ -2646,6 +2646,7 @@ ns_draw_text_decoration (struct glyph_string *s, struct face *face,
 
           /* If the prev was underlined, match its appearance. */
           if (s->prev && s->prev->face->underline_p
+	      && s->prev->face->underline_type == FACE_UNDER_LINE
               && s->prev->underline_thickness > 0)
             {
               thickness = s->prev->underline_thickness;
diff --git a/src/w32term.c b/src/w32term.c
index c5681438bfe..36ae4d7797f 100644
--- a/src/w32term.c
+++ b/src/w32term.c
@@ -358,7 +358,7 @@ w32_restore_glyph_string_clip (struct glyph_string *s)
 void
 w32_draw_underwave (struct glyph_string *s, COLORREF color)
 {
-  int wave_height = 2, wave_length = 3;
+  int wave_height = 3, wave_length = 2;
   int dx, dy, x0, y0, width, x1, y1, x2, y2, odd, xmax;
   XRectangle wave_clip, string_clip, final_clip;
   RECT w32_final_clip, w32_string_clip;
@@ -367,7 +367,7 @@ w32_draw_underwave (struct glyph_string *s, COLORREF color)
   dx = wave_length;
   dy = wave_height - 1;
   x0 = s->x;
-  y0 = s->ybase + 1;
+  y0 = s->ybase - wave_height + 3;
   width = s->width;
   xmax = x0 + width;
 
@@ -2456,7 +2456,8 @@ x_draw_glyph_string (struct glyph_string *s)
               unsigned long thickness, position;
               int y;
 
-              if (s->prev && s->prev->face->underline_p)
+              if (s->prev && s->prev->face->underline_p
+		  && s->prev->face->underline_type == FACE_UNDER_LINE)
                 {
                   /* We use the same underline style as the previous one.  */
                   thickness = s->prev->underline_thickness;
diff --git a/src/xterm.c b/src/xterm.c
index e9c4709d999..f63f10566f6 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -2631,14 +2631,14 @@ x_draw_stretch_glyph_string (struct glyph_string *s)
 static void
 x_draw_underwave (struct glyph_string *s)
 {
-  int wave_height = 2, wave_length = 3;
+  int wave_height = 3, wave_length = 2;
   int dx, dy, x0, y0, width, x1, y1, x2, y2, odd, xmax;
   XRectangle wave_clip, string_clip, final_clip;
 
   dx = wave_length;
   dy = wave_height - 1;
   x0 = s->x;
-  y0 = s->ybase + 1;
+  y0 = s->ybase - wave_height + 3;
   width = s->width;
   xmax = x0 + width;
 
@@ -2800,7 +2800,8 @@ x_draw_glyph_string (struct glyph_string *s)
               unsigned long thickness, position;
               int y;
 
-              if (s->prev && s->prev->face->underline_p)
+              if (s->prev && s->prev->face->underline_p
+		  && s->prev->face->underline_type == FACE_UNDER_LINE)
                 {
                   /* We use the same underline style as the previous one.  */
                   thickness = s->prev->underline_thickness;