Fix "Inconsistent FL_FULLSCREEN when creating full-screen window" (#1225)

The commit has all platforms send the FL_FULLSCREEN event when a window is created fullscreen.

src/Fl_win32.cxx

@@ -2342,6 +2342,8 @@ void Fl_WinAPI_Window_Driver::makeWindow() {
 
   if (!im_enabled)
     flImmAssociateContextEx((HWND)x->xid, 0, 0);
+  
+  if (w->fullscreen_active()) Fl::handle(FL_FULLSCREEN, w);
 }
 
 

src/Fl_x.cxx

@@ -2474,8 +2474,8 @@ void Fl_X11_Window_Driver::fullscreen_on() {
     show();
     /* We want to grab the window, not a widget, so we cannot use Fl::grab */
     XGrabKeyboard(fl_display, fl_xid(pWindow), 1, GrabModeAsync, GrabModeAsync, fl_event_time);
-    Fl::handle(FL_FULLSCREEN, pWindow);
   }
+  Fl::handle(FL_FULLSCREEN, pWindow);
 }
 
 void Fl_X11_Window_Driver::fullscreen_off(int X, int Y, int W, int H) {
@@ -2487,8 +2487,8 @@ void Fl_X11_Window_Driver::fullscreen_off(int X, int Y, int W, int H) {
     hide();
     resize(X,Y,W,H);
     show();
-    Fl::handle(FL_FULLSCREEN, pWindow);
   }
+  Fl::handle(FL_FULLSCREEN, pWindow);
 }
 
 
@@ -2819,7 +2819,7 @@ void Fl_X::make_xid(Fl_Window* win, XVisualInfo *visual, Colormap colormap)
   if (win->fullscreen_active() && !Fl_X11_Screen_Driver::ewmh_supported()) {
     XGrabKeyboard(fl_display, xp->xid, 1, GrabModeAsync, GrabModeAsync, fl_event_time);
   }
-
+  if (win->fullscreen_active()) Fl::handle(FL_FULLSCREEN, win);
 }
 
 ////////////////////////////////////////////////////////////////

src/drivers/Wayland/Fl_Wayland_Gl_Window_Driver.cxx

@@ -397,6 +397,7 @@ void Fl_Wayland_Gl_Window_Driver::resize(int is_a_resize, int W, int H) {
                                Fl_Wayland_Graphics_Driver::p_surface_frame_listener, xid);
     }
     wl_egl_window_resize(egl_window, W, H, 0, 0);
+    wl_surface_set_buffer_scale(xid->wl_surface, s);
   }
   /* CONTROL_LEAKING_SUB_GL_WINDOWS
   if (Fl_Wayland_Window_Driver::driver(pWindow)->subRect()) {

src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx

@@ -1603,6 +1603,7 @@ void Fl_Wayland_Window_Driver::makeWindow()
       previous_floatingtitle = NULL;
     }
   }
+  if (pWindow->fullscreen_active()) Fl::handle(FL_FULLSCREEN, pWindow);
 }