winex11.drv: Implemented DESKTOPHORZ/VERTRES device caps.

dlls/gdi32/dc.c

@@ -647,8 +647,8 @@ HDC WINAPI CreateDCW( LPCWSTR driver, LPCWSTR device, LPCWSTR output,
         return 0;
     }
 
-    dc->hVisRgn = CreateRectRgn( 0, 0, GetDeviceCaps( hdc, HORZRES ),
-                                 GetDeviceCaps( hdc, VERTRES ) );
+    dc->hVisRgn = CreateRectRgn( 0, 0, GetDeviceCaps( hdc, DESKTOPHORZRES ),
+                                 GetDeviceCaps( hdc, DESKTOPVERTRES ) );
 
     DC_InitDC( dc );
     GDI_ReleaseObj( hdc );

dlls/winex11.drv/init.c

@@ -194,6 +194,10 @@ INT X11DRV_GetDeviceCaps( X11DRV_PDEVICE *physDev, INT cap )
         return screen_width;
     case VERTRES:
         return screen_height;
+    case DESKTOPHORZRES:
+        return virtual_screen_rect.right - virtual_screen_rect.left;
+    case DESKTOPVERTRES:
+        return virtual_screen_rect.bottom - virtual_screen_rect.top;
     case BITSPIXEL:
         return screen_depth;
     case PLANES:
@@ -258,8 +262,6 @@ INT X11DRV_GetDeviceCaps( X11DRV_PDEVICE *physDev, INT cap )
     case SCALINGFACTORX:
     case SCALINGFACTORY:
     case VREFRESH:
-    case DESKTOPVERTRES:
-    case DESKTOPHORZRES:
     case BLTALIGNMENT:
         return 0;
     default: