--- rxvt-unicode/src/rxvtimg.C	2012/06/07 09:25:23	1.37
+++ rxvt-unicode/src/rxvtimg.C	2012/06/07 18:07:42	1.46
@@ -4,8 +4,8 @@
 
 #if HAVE_IMG
 
-rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height)
-: s(screen), x(x), y(y), w(width), h(height), format(format), repeat(RepeatNormal),
+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)
 {
 }
@@ -178,7 +178,7 @@
   int size = max (rh, rv) * 2 + 1;
   double *kernel = (double *)malloc (size * sizeof (double));
   XFixed *params = (XFixed *)malloc ((size + 2) * sizeof (XFixed));
-  rxvt_img *img = new rxvt_img (s, format, x, y, w, h);
+  rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
   img->alloc ();
 
   Picture src = src_picture ();
@@ -393,22 +393,54 @@
   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 ()
 {
   if (x == 0 && y == 0 && w == ref->w && h == ref->h)
     return clone ();
 
-  rxvt_img *img = new rxvt_img (s, format, 0, 0, w, h);
-  img->alloc ();
-
   Display *dpy = s->display->dpy;
 
+  bool alpha = !format->direct.alphaMask
+               && (x || y)
+               && repeat == RepeatNone;
+
+  rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, 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, x, y, 0, 0, 0, 0, w, h);
-  
+  if (alpha)
+    {
+      XRenderColor rc = { 0, 0, 0, 0 };
+      XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
+      XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h);
+    }
+  else
+    XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h);
+
   XRenderFreePicture (dpy, src);
   XRenderFreePicture (dpy, dst);
 
@@ -428,7 +460,9 @@
       img->w = width;
       img->h = height;
 
-      img->reify ();
+      rxvt_img *img2 = img->reify ();
+      delete img;
+      img = img2;
     }
 
   return img;
@@ -437,7 +471,7 @@
 rxvt_img *
 rxvt_img::transform (int new_width, int new_height, double matrix[9])
 {
-  rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height);
+  rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat);
   img->alloc ();
 
   Display *dpy = s->display->dpy;
@@ -450,8 +484,10 @@
     for (int j = 0; j < 3; ++j)
       xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);
 
-  xfrm.matrix [0][2] += XDoubleToFixed (x);//TODO
-  xfrm.matrix [0][3] += XDoubleToFixed (y);
+#if 0
+  xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
+  xfrm.matrix [1][2] -= XDoubleToFixed (y);
+#endif
 
   XRenderSetPictureFilter (dpy, src, "good", 0, 0);
   XRenderSetPictureTransform (dpy, src, &xfrm);
@@ -466,13 +502,24 @@
 rxvt_img *
 rxvt_img::scale (int new_width, int new_height)
 {
+  if (w == new_width && h == new_height)
+    return clone ();
+
   double matrix[9] = {
     w  / (double)new_width, 0, 0,
     0, h / (double)new_height, 0,
     0,                      0, 1
   };
 
-  return transform (new_width, new_height, matrix);
+  int old_repeat_mode = repeat;
+  repeat = RepeatPad; // not right, but xrender can't proeprly scale it seems
+
+  rxvt_img *img = transform (new_width, new_height, matrix);
+
+  repeat = old_repeat_mode;
+  img->repeat = repeat;
+
+  return img;
 }
 
 rxvt_img *
@@ -491,12 +538,12 @@
 }
 
 rxvt_img *
-rxvt_img::convert_to (XRenderPictFormat *new_format, const rxvt_color &bg)
+rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg)
 {
   if (new_format == format)
     return clone ();
 
-  rxvt_img *img = new rxvt_img (s, new_format, 0, 0, w, h);
+  rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat);
   img->alloc ();
 
   Display *dpy = s->display->dpy;
@@ -529,7 +576,7 @@
 {
   rxvt_img *img2 = clone ();
   Display *dpy = s->display->dpy;
-  Picture src = src_picture ();
+  Picture src = img->src_picture ();
   Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
   Picture mask = create_xrender_mask (dpy, img->pm, False);