diff --git a/FL/Fl_Window.H b/FL/Fl_Window.H
index 2888b85fc..e1b0ee479 100644
--- a/FL/Fl_Window.H
+++ b/FL/Fl_Window.H
@@ -580,8 +580,6 @@ public:
    */
   int decorated_h();
 
-  // Captures the titlebar and borders of the window, if they exist.
-  void capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right);
   Fl_Window_Driver *driver() { return pWindowDriver; }
 
   /**
diff --git a/FL/Fl_Window_Driver.H b/FL/Fl_Window_Driver.H
index d36774535..629d7ad86 100644
--- a/FL/Fl_Window_Driver.H
+++ b/FL/Fl_Window_Driver.H
@@ -30,7 +30,7 @@
 class Fl_Window;
 class Fl_X;
 class Fl_Image;
-
+class Fl_Shared_Image;
 
 /**
  \brief A base class for platform specific window handling code.
@@ -63,6 +63,7 @@ public:
   virtual const void *icon() const {return NULL;}
   virtual void icon(const void * ic) {}
   virtual void free_icons() {}
+  virtual void capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right);
 };
 
 
diff --git a/src/Fl_Widget_Surface.cxx b/src/Fl_Widget_Surface.cxx
index 8f792565f..e7c783dc5 100644
--- a/src/Fl_Widget_Surface.cxx
+++ b/src/Fl_Widget_Surface.cxx
@@ -20,6 +20,7 @@
 #include <FL/fl_draw.H>
 #include <FL/Fl.H>
 #include <FL/Fl_Shared_Image.H>
+#include <FL/Fl_Window_Driver.H>
 
 
 /** The constructor.
@@ -193,7 +194,7 @@ int Fl_Widget_Surface::printable_rect(int *w, int *h) {return 1;}
 void Fl_Widget_Surface::draw_decorated_window(Fl_Window *win, int x_offset, int y_offset)
 {
   Fl_Shared_Image *top, *left, *bottom, *right;
-  win->capture_titlebar_and_borders(top, left, bottom, right);
+  win->driver()->capture_titlebar_and_borders(top, left, bottom, right);
   int wsides = left ? left->w() : 0;
   int toph = top ? top->h() : 0;
   if (top) {
diff --git a/src/Fl_Window.cxx b/src/Fl_Window.cxx
index 7c2131341..53b300817 100644
--- a/src/Fl_Window.cxx
+++ b/src/Fl_Window.cxx
@@ -433,15 +433,6 @@ void Fl_Window::wait_for_expose() {
   }
 }
 
-#if defined(FL_PORTING)
-#  pragma message "FL_PORTING: implement Fl_Window::capture_titlebar_and_borders"
-void Fl_Window::capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right)
-{
-  top = left = bottom = right = NULL;
-}
-#endif
-
-
 #endif  // ! __APPLE__ // PORTME: Fl_Window_Driver - platform window driver
 
 //
diff --git a/src/Fl_Window_Driver.cxx b/src/Fl_Window_Driver.cxx
index de8760f90..de121107a 100644
--- a/src/Fl_Window_Driver.cxx
+++ b/src/Fl_Window_Driver.cxx
@@ -156,8 +156,9 @@ void Fl_Window_Driver::shape_pixmap_(Fl_Image* pixmap) {
   delete rgba;
 }
 
-
-
+void Fl_Window_Driver::capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right) {
+  top = left = bottom = right = NULL;
+}
 
 //
 // End of "$Id$".
diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 256569a04..f4c57659e 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -41,8 +41,9 @@ extern "C" {
 #include <FL/Fl_Tooltip.H>
 #include <FL/Fl_Printer.H>
 #include <FL/Fl_Shared_Image.H>
-#include "drivers/Quartz/Fl_Quartz_Graphics_Driver.h"
-#include "drivers/Cocoa/Fl_Cocoa_Screen_Driver.h"
+#include "drivers/Quartz/Fl_Quartz_Graphics_Driver.H"
+#include "drivers/Cocoa/Fl_Cocoa_Screen_Driver.H"
+#include "drivers/Cocoa/Fl_Cocoa_Window_Driver.H"
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -4338,30 +4339,30 @@ static void draw_layer_to_context(CALayer *layer, CGContextRef gc, int w, int h)
 /* Returns images of the capture of the window title-bar.
  On the Mac OS platform, left, bottom and right are returned NULL; top is returned with depth 4.
  */
-void Fl_Window::capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right)
+void Fl_Cocoa_Window_Driver::capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right)
 {
   left = bottom = right = NULL;
-  int htop = decorated_h() - h();
-  CALayer *layer = get_titlebar_layer(this);
+  int htop = pWindow->decorated_h() - pWindow->h();
+  CALayer *layer = get_titlebar_layer(pWindow);
   CGColorSpaceRef cspace = CGColorSpaceCreateDeviceRGB();
-  uchar *rgba = new uchar[4 * w() * htop * 4];
-  CGContextRef auxgc = CGBitmapContextCreate(rgba, 2 * w(), 2 * htop, 8, 8 * w(), cspace, kCGImageAlphaPremultipliedLast);
+  uchar *rgba = new uchar[4 * pWindow->w() * htop * 4];
+  CGContextRef auxgc = CGBitmapContextCreate(rgba, 2 * pWindow->w(), 2 * htop, 8, 8 * pWindow->w(), cspace, kCGImageAlphaPremultipliedLast);
   CGColorSpaceRelease(cspace);
   CGContextScaleCTM(auxgc, 2, 2);
   if (layer) {
-    draw_layer_to_context(layer, auxgc, w(), htop);
+    draw_layer_to_context(layer, auxgc, pWindow->w(), htop);
   } else {
-    CGImageRef img = Fl_X::CGImage_from_window_rect(this, 0, -htop, w(), htop);
+    CGImageRef img = Fl_X::CGImage_from_window_rect(pWindow, 0, -htop, pWindow->w(), htop);
     CGContextSaveGState(auxgc);
-    Fl_X::clip_to_rounded_corners(auxgc, w(), htop);
-    CGContextDrawImage(auxgc, CGRectMake(0, 0, w(), htop), img);
+    Fl_X::clip_to_rounded_corners(auxgc, pWindow->w(), htop);
+    CGContextDrawImage(auxgc, CGRectMake(0, 0, pWindow->w(), htop), img);
     CGContextRestoreGState(auxgc);
     CFRelease(img);
   }
-  Fl_RGB_Image *top_rgb = new Fl_RGB_Image(rgba, 2 * w(), 2 * htop, 4);
+  Fl_RGB_Image *top_rgb = new Fl_RGB_Image(rgba, 2 * pWindow->w(), 2 * htop, 4);
   top_rgb->alloc_array = 1;
   top = Fl_Shared_Image::get(top_rgb);
-  top->scale(w(),htop);
+  top->scale(pWindow->w(),htop);
   CGContextRelease(auxgc);
 }
 
@@ -4413,7 +4414,7 @@ void Fl_System_Printer::draw_decorated_window(Fl_Window *win, int x_offset, int
   Fl::check();
   // capture the window title bar with no title
   Fl_Shared_Image *top, *left, *bottom, *right;
-  win->capture_titlebar_and_borders(top, left, bottom, right);
+  win->driver()->capture_titlebar_and_borders(top, left, bottom, right);
   win->label(title); // put back the window title
   this->set_current(); // back to the Fl_Paged_Device
   top->draw(x_offset, y_offset); // print the title bar
diff --git a/src/Fl_win32.cxx b/src/Fl_win32.cxx
index 1c2548782..c15717b0f 100644
--- a/src/Fl_win32.cxx
+++ b/src/Fl_win32.cxx
@@ -2556,22 +2556,22 @@ int Fl_Window::decorated_h()
  On the WIN32 platform, this function exploits a feature of fl_read_image() which, when called
  with NULL first argument and when fl_gc is set to the screen device context, captures the window decoration.
  */
-void Fl_Window::capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right)
+void Fl_WinAPI_Window_Driver::capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right)
 {
   Fl_RGB_Image *r_top, *r_left, *r_bottom, *r_right;
   top = left = bottom = right = NULL;
-  if (!shown() || parent() || !border() || !visible()) return;
+  if (!pWindow->shown() || pWindow->parent() || !pWindow->border() || !pWindow->visible()) return;
   int wsides, hbottom, bt;
-  RECT r = border_width_title_bar_height(this, wsides, hbottom, bt);
+  RECT r = border_width_title_bar_height(pWindow, wsides, hbottom, bt);
   int htop = bt + hbottom;
   Fl_Surface_Device *previous = Fl_Surface_Device::surface();
   Window save_win = fl_window;
   Fl_Display_Device::display_device()->set_current();
-  show();
+  pWindow->show();
   Fl::check();
   void* save_gc = fl_graphics_driver->gc();
   fl_graphics_driver->gc(GetDC(NULL));
-  int ww = w() + 2 * wsides;
+  int ww = pWindow->w() + 2 * wsides;
   // capture the 4 window sides from screen
   fl_window = NULL; // force use of read_win_rectangle() by fl_read_image()
   uchar *rgb;
@@ -2582,12 +2582,12 @@ void Fl_Window::capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Im
     top = Fl_Shared_Image::get(r_top);
   }
   if (wsides) {
-    rgb = fl_read_image(NULL, r.left, r.top + htop, wsides, h());
-    r_left = new Fl_RGB_Image(rgb, wsides, h(), 3);
+    rgb = fl_read_image(NULL, r.left, r.top + htop, wsides, pWindow->h());
+    r_left = new Fl_RGB_Image(rgb, wsides, pWindow->h(), 3);
     r_left->alloc_array = 1;
     left = Fl_Shared_Image::get(r_left);
-    rgb = fl_read_image(NULL, r.right - wsides, r.top + htop, wsides, h());
-    r_right = new Fl_RGB_Image(rgb, wsides, h(), 3);
+    rgb = fl_read_image(NULL, r.right - wsides, r.top + htop, wsides, pWindow->h());
+    r_right = new Fl_RGB_Image(rgb, wsides, pWindow->h(), 3);
     r_right->alloc_array = 1;
     right = Fl_Shared_Image::get(r_right);
     rgb = fl_read_image(NULL, r.left, r.bottom-hbottom, ww, hbottom);
diff --git a/src/Fl_x.cxx b/src/Fl_x.cxx
index f2092296b..b0469c36b 100644
--- a/src/Fl_x.cxx
+++ b/src/Fl_x.cxx
@@ -2983,60 +2983,6 @@ int Fl_Window::decorated_w()
   return w;
 }
 
-/* Returns images of the captures of the window title-bar, and the left, bottom and right window borders
- (or NULL if a particular border is absent).
- Returned images can be deleted after use. Their depth and size may be platform-dependent.
- The top and bottom images extend from left of the left border to right of the right border.
- 
- On the X11 platform, this function exploits a feature of fl_read_image() which, when called
- with negative 4th argument, captures the window decoration.
- */
-void Fl_Window::capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right)
-{
-  Fl_RGB_Image *r_top, *r_left, *r_bottom, *r_right;
-  top = left = bottom = right = NULL;
-  if (decorated_h() == h()) return;
-  Window from = fl_window;
-  Fl_Surface_Device *previous = Fl_Surface_Device::surface();
-  Fl_Display_Device::display_device()->set_current();
-  show();
-  Fl::check();
-  make_current();
-  Window root, parent, *children, child_win;
-  unsigned n = 0;
-  int do_it;
-  int wsides, htop;
-  do_it = (XQueryTree(fl_display, fl_window, &root, &parent, &children, &n) != 0 &&
-           XTranslateCoordinates(fl_display, fl_window, parent, 0, 0, &wsides, &htop, &child_win) == True);
-  if (n) XFree(children);
-  if (!do_it) wsides = htop = 0;
-  int hbottom = wsides;
-  fl_window = parent;
-  uchar *rgb;
-  if (htop) {
-    rgb = fl_read_image(NULL, 0, 0, - (w() + 2 * wsides), htop);
-    r_top = new Fl_RGB_Image(rgb, w() + 2 * wsides, htop, 3);
-    r_top->alloc_array = 1;
-    top = Fl_Shared_Image::get(r_top);
-  }
-  if (wsides) {
-    rgb = fl_read_image(NULL, 0, htop, -wsides, h());
-    r_left = new Fl_RGB_Image(rgb, wsides, h(), 3);
-    r_left->alloc_array = 1;
-    left = Fl_Shared_Image::get(r_left);
-    rgb = fl_read_image(NULL, w() + wsides, htop, -wsides, h());
-    r_right = new Fl_RGB_Image(rgb, wsides, h(), 3);
-    r_right->alloc_array = 1;
-    right = Fl_Shared_Image::get(r_right);
-    rgb = fl_read_image(NULL, 0, htop + h(), -(w() + 2*wsides), hbottom);
-    r_bottom = new Fl_RGB_Image(rgb, w() + 2*wsides, hbottom, 3);
-    r_bottom->alloc_array = 1;
-    bottom = Fl_Shared_Image::get(r_bottom);
-  }
-  fl_window = from;
-  previous->Fl_Surface_Device::set_current();
-}
-
 #ifdef USE_PRINT_BUTTON
 // to test the Fl_Printer class creating a "Print front window" button in a separate window
 // contains also preparePrintFront call above
diff --git a/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H b/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H
index d8a34fc1b..36be7ee7d 100644
--- a/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H
+++ b/src/drivers/Cocoa/Fl_Cocoa_Window_Driver.H
@@ -63,6 +63,8 @@ public:
   virtual void take_focus();
   virtual void shape(const Fl_Image* img);
   virtual void draw();
+  // that one is implemented in Fl_Cocoa.mm because it uses Objective-c
+  virtual void capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right);
 };
 
 
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H
index 605a0547c..53c00cad4 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H
+++ b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.H
@@ -73,6 +73,8 @@ public:
   virtual void icon(const void * ic);
   virtual void free_icons();
   void icons(HICON big_icon, HICON small_icon);
+  // this one is implemented in Fl_win32.cxx
+  virtual void capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right);
 };
 
 
diff --git a/src/drivers/X11/Fl_X11_Window_Driver.H b/src/drivers/X11/Fl_X11_Window_Driver.H
index e4f8862bd..1eb161e0b 100644
--- a/src/drivers/X11/Fl_X11_Window_Driver.H
+++ b/src/drivers/X11/Fl_X11_Window_Driver.H
@@ -73,6 +73,7 @@ public:
   virtual const void *icon() const;
   virtual void icon(const void * ic);
   virtual void free_icons();
+  virtual void capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right);
 };
 
 
diff --git a/src/drivers/X11/Fl_X11_Window_Driver.cxx b/src/drivers/X11/Fl_X11_Window_Driver.cxx
index d1f377793..32ac787a2 100644
--- a/src/drivers/X11/Fl_X11_Window_Driver.cxx
+++ b/src/drivers/X11/Fl_X11_Window_Driver.cxx
@@ -19,7 +19,9 @@
 
 #include "../../config_lib.h"
 #include "Fl_X11_Window_Driver.H"
+#include <FL/Fl_Shared_Image.H>
 #include <FL/fl_draw.H>
+#include <FL/Fl.H>
 #include <string.h>
 #if HAVE_DLFCN_H
 #include <dlfcn.h>
@@ -275,6 +277,60 @@ void Fl_X11_Window_Driver::free_icons() {
 }
 
 
+/* Returns images of the captures of the window title-bar, and the left, bottom and right window borders
+ (or NULL if a particular border is absent).
+ Returned images can be deleted after use. Their depth and size may be platform-dependent.
+ The top and bottom images extend from left of the left border to right of the right border.
+ 
+ On the X11 platform, this function exploits a feature of fl_read_image() which, when called
+ with negative 4th argument, captures the window decoration.
+ */
+void Fl_X11_Window_Driver::capture_titlebar_and_borders(Fl_Shared_Image*& top, Fl_Shared_Image*& left, Fl_Shared_Image*& bottom, Fl_Shared_Image*& right)
+{
+  Fl_RGB_Image *r_top, *r_left, *r_bottom, *r_right;
+  top = left = bottom = right = NULL;
+  if (pWindow->decorated_h() == pWindow->h()) return;
+  Window from = fl_window;
+  Fl_Surface_Device *previous = Fl_Surface_Device::surface();
+  Fl_Display_Device::display_device()->set_current();
+  pWindow->show();
+  Fl::check();
+  pWindow->make_current();
+  Window root, parent, *children, child_win;
+  unsigned n = 0;
+  int do_it;
+  int wsides, htop;
+  do_it = (XQueryTree(fl_display, fl_window, &root, &parent, &children, &n) != 0 &&
+           XTranslateCoordinates(fl_display, fl_window, parent, 0, 0, &wsides, &htop, &child_win) == True);
+  if (n) XFree(children);
+  if (!do_it) wsides = htop = 0;
+  int hbottom = wsides;
+  fl_window = parent;
+  uchar *rgb;
+  if (htop) {
+    rgb = fl_read_image(NULL, 0, 0, - (pWindow->w() + 2 * wsides), htop);
+    r_top = new Fl_RGB_Image(rgb, pWindow->w() + 2 * wsides, htop, 3);
+    r_top->alloc_array = 1;
+    top = Fl_Shared_Image::get(r_top);
+  }
+  if (wsides) {
+    rgb = fl_read_image(NULL, 0, htop, -wsides, pWindow->h());
+    r_left = new Fl_RGB_Image(rgb, wsides, pWindow->h(), 3);
+    r_left->alloc_array = 1;
+    left = Fl_Shared_Image::get(r_left);
+    rgb = fl_read_image(NULL, pWindow->w() + wsides, htop, -wsides, pWindow->h());
+    r_right = new Fl_RGB_Image(rgb, wsides, pWindow->h(), 3);
+    r_right->alloc_array = 1;
+    right = Fl_Shared_Image::get(r_right);
+    rgb = fl_read_image(NULL, 0, htop + pWindow->h(), -(pWindow->w() + 2*wsides), hbottom);
+    r_bottom = new Fl_RGB_Image(rgb, pWindow->w() + 2*wsides, hbottom, 3);
+    r_bottom->alloc_array = 1;
+    bottom = Fl_Shared_Image::get(r_bottom);
+  }
+  fl_window = from;
+  previous->Fl_Surface_Device::set_current();
+}
+
 //
 // End of "$Id$".
 //