win32u: Move default WM_ERASEBKGND implementation from user32.

dlls/user32/defwnd.c

@@ -266,25 +266,6 @@ static LRESULT DEFWND_DefWinProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lPa
         DEFWND_Print(hwnd, (HDC)wParam, lParam);
         return 0;
 
-    case WM_ERASEBKGND:
-    case WM_ICONERASEBKGND:
-        {
-            RECT rect;
-            HDC hdc = (HDC)wParam;
-            HBRUSH hbr = (HBRUSH)GetClassLongPtrW( hwnd, GCLP_HBRBACKGROUND );
-            if (!hbr) return 0;
-
-            if (GetClassLongW( hwnd, GCL_STYLE ) & CS_PARENTDC)
-            {
-                /* can't use GetClipBox with a parent DC or we fill the whole parent */
-                GetClientRect( hwnd, &rect );
-                DPtoLP( hdc, (LPPOINT)&rect, 2 );
-            }
-            else GetClipBox( hdc, &rect );
-            FillRect( hdc, &rect, hbr );
-            return 1;
-        }
-
     case WM_CTLCOLORMSGBOX:
     case WM_CTLCOLOREDIT:
     case WM_CTLCOLORLISTBOX:

dlls/win32u/defwnd.c

@@ -31,6 +31,15 @@
 WINE_DEFAULT_DEBUG_CHANNEL(win);
 
 
+void fill_rect( HDC dc, const RECT *rect, HBRUSH hbrush )
+{
+    HBRUSH prev_brush;
+
+    prev_brush = NtGdiSelectBrush( dc, hbrush );
+    NtGdiPatBlt( dc, rect->left, rect->top, rect->right - rect->left, rect->bottom - rect->top, PATCOPY );
+    if (prev_brush) NtGdiSelectBrush( dc, prev_brush );
+}
+
 /***********************************************************************
  *           AdjustWindowRectEx (win32u.so)
  */
@@ -310,6 +319,25 @@ LRESULT default_window_proc( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam,
             result = send_message( get_parent( hwnd ), WM_MOUSEWHEEL, wparam, lparam );
         break;
 
+    case WM_ERASEBKGND:
+    case WM_ICONERASEBKGND:
+        {
+            RECT rect;
+            HDC hdc = (HDC)wparam;
+            HBRUSH hbr = UlongToHandle( get_class_long( hwnd, GCLP_HBRBACKGROUND, FALSE ));
+            if (!hbr) break;
+
+            if (get_class_long( hwnd, GCL_STYLE, FALSE ) & CS_PARENTDC)
+            {
+                /* can't use GetClipBox with a parent DC or we fill the whole parent */
+                get_client_rect( hwnd, &rect );
+                NtGdiTransformPoints( hdc, (POINT *)&rect, (POINT *)&rect, 1, NtGdiDPtoLP );
+            }
+            else NtGdiGetAppClipBox( hdc, &rect );
+            fill_rect( hdc, &rect, hbr );
+            return 1;
+        }
+
     case WM_GETDLGCODE:
         break;
 

dlls/win32u/input.c

@@ -1799,15 +1799,6 @@ static void display_caret( HWND hwnd, const RECT *r )
     NtUserReleaseDC( hwnd, dc );
 }
 
-static void fill_rect( HDC dc, const RECT *rect, HBRUSH hbrush )
-{
-    HBRUSH prev_brush;
-
-    prev_brush = NtGdiSelectBrush( dc, hbrush );
-    NtGdiPatBlt( dc, rect->left, rect->top, rect->right - rect->left, rect->bottom - rect->top, PATCOPY );
-    if (prev_brush) NtGdiSelectBrush( dc, prev_brush );
-}
-
 static unsigned int get_caret_registry_timeout(void)
 {
     char value_buffer[FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data[11 * sizeof(WCHAR)])];

dlls/win32u/win32u_private.h

@@ -353,6 +353,7 @@ extern void register_window_surface( struct window_surface *old,
 /* defwnd.c */
 extern LRESULT default_window_proc( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam,
                                     BOOL ansi ) DECLSPEC_HIDDEN;
+extern void fill_rect( HDC dc, const RECT *rect, HBRUSH hbrush ) DECLSPEC_HIDDEN;
 
 /* hook.c */
 extern LRESULT call_current_hook( HHOOK hhook, INT code, WPARAM wparam, LPARAM lparam ) DECLSPEC_HIDDEN;