--- rxvt-unicode/src/rxvtimg.C	2012/06/12 19:00:57	1.81
+++ rxvt-unicode/src/rxvtimg.C	2012/06/14 18:06:15	1.83
@@ -4,6 +4,26 @@
 
 #if HAVE_IMG
 
+static XRenderPictFormat *
+find_alpha_format_for (Display *dpy, XRenderPictFormat *format)
+{
+  if (format->direct.alphaMask)
+    return format; // already has alpha
+
+  // try to find a suitable alpha format, one bit alpha is enough for our purposes
+  if (format->type == PictTypeDirect)
+    for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
+      if (f->direct.alphaMask
+          && f->type == PictTypeDirect
+          && ecb_popcount32 (f->direct.redMask  ) >= ecb_popcount32 (format->direct.redMask  )
+          && ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
+          && ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
+        return f;
+
+  // should be a very good fallback
+  return XRenderFindStandardFormat (dpy, PictStandardARGB32);
+}
+
 rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height, int repeat)
 : s(screen), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
   pm(0), ref(0)
@@ -226,11 +246,9 @@
 }
 
 void
-rxvt_img::fill (const rxvt_color &c)
+rxvt_img::fill (const rgba &c)
 {
-  rgba cc;
-  c.get (cc);
-  XRenderColor rc = { cc.r, cc.g, cc.b, cc.a };
+  XRenderColor rc = { c.r, c.g, c.b, c.a };
 
   Display *dpy = s->display->dpy;
   Picture src = src_picture ();
@@ -238,6 +256,31 @@
   XRenderFreePicture (dpy, src);
 }
 
+void
+rxvt_img::add_alpha ()
+{
+  if (format->direct.alphaMask)
+    return;
+
+  Display *dpy = s->display->dpy;
+
+  rxvt_img *img = new rxvt_img (s, find_alpha_format_for (dpy, format), x, y, w, h, repeat);
+  img->alloc ();
+
+  Picture src = src_picture ();
+  Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
+  
+  XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
+
+  XRenderFreePicture (dpy, src);
+  XRenderFreePicture (dpy, dst);
+
+  ::swap (img->ref, ref);
+  ::swap (img->pm , pm );
+
+  delete img;
+}
+
 static void
 get_gaussian_kernel (int radius, int width, double *kernel, XFixed *params)
 {
@@ -399,12 +442,7 @@
 
   rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
   img->alloc ();
-
-  {
-    rxvt_color empty;
-    empty.set (s, rgba (0, 0, 0, 0));
-    img->fill (empty);
-  }
+  img->fill (rgba (0, 0, 0, 0));
 
   // premultiply (yeah, these are not exact, sue me or fix it)
   r = (r * (a >> 8)) >> 8;
@@ -446,26 +484,6 @@
   return new rxvt_img (*this);
 }
 
-static XRenderPictFormat *
-find_alpha_format_for (Display *dpy, XRenderPictFormat *format)
-{
-  if (format->direct.alphaMask)
-    return format; // already has alpha
-
-  // try to find a suitable alpha format, one bit alpha is enough for our purposes
-  if (format->type == PictTypeDirect)
-    for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
-      if (f->direct.alphaMask
-          && f->type == PictTypeDirect
-          && ecb_popcount32 (f->direct.redMask  ) >= ecb_popcount32 (format->direct.redMask  )
-          && ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
-          && ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
-        return f;
-
-  // should be a very good fallback
-  return XRenderFindStandardFormat (dpy, PictStandardARGB32);
-}
-
 rxvt_img *
 rxvt_img::reify ()
 {
@@ -650,7 +668,7 @@
 }
 
 rxvt_img *
-rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg)
+rxvt_img::convert_format (XRenderPictFormat *new_format, const rgba &bg)
 {
   if (new_format == format)
     return clone ();
@@ -666,10 +684,7 @@
   if (format->direct.alphaMask && !new_format->direct.alphaMask)
     {
       // does it have to be that complicated
-      rgba c;
-      bg.get (c);
-
-      XRenderColor rc = { c.r, c.g, c.b, 0xffff };
+      XRenderColor rc = { bg.r, bg.g, bg.b, bg.a };
       XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);
 
       op = PictOpOver;