gdi32: Allow user32 to specify the display driver to use.

dlls/gdi32/driver.c

@@ -223,6 +223,23 @@ HMODULE CDECL __wine_get_driver_module( HDC hdc )
 }
 
 
+/***********************************************************************
+ *           __wine_set_display_driver_module    (GDI32.@)
+ */
+void CDECL __wine_set_display_driver( HMODULE module )
+{
+    struct graphics_driver *driver;
+
+    if (!(driver = create_driver( module )))
+    {
+        ERR( "Could not create graphics driver\n" );
+        ExitProcess(1);
+    }
+    if (InterlockedCompareExchangePointer( (void **)&display_driver, driver, NULL ))
+        HeapFree( GetProcessHeap(), 0, driver );
+}
+
+
 static INT nulldrv_AbortDoc( PHYSDEV dev )
 {
     return 0;

dlls/gdi32/gdi32.spec

@@ -515,6 +515,7 @@
 
 # Graphics drivers
 @ cdecl __wine_get_driver_module(long)
+@ cdecl __wine_set_display_driver(long)
 
 # OpenGL
 @ cdecl __wine_get_wgl_driver(long long)

dlls/user32/driver.c

@@ -158,6 +158,7 @@ static const USER_DRIVER *load_driver(void)
     }
     else LdrAddRefDll( 0, graphics_driver );
 
+    __wine_set_display_driver( graphics_driver );
     register_builtin_classes();
 
     return driver;

include/wine/gdi_driver.h

@@ -277,6 +277,7 @@ extern void CDECL __wine_make_gdi_object_system( HGDIOBJ handle, BOOL set );
 extern void CDECL __wine_set_visible_region( HDC hdc, HRGN hrgn, const RECT *vis_rect,
                                              const RECT *device_rect, struct window_surface *surface );
 extern HMODULE CDECL __wine_get_driver_module( HDC hdc );
+extern void CDECL __wine_set_display_driver( HMODULE module );
 extern struct opengl_funcs * CDECL __wine_get_wgl_driver( HDC hdc, UINT version );
 
 #endif /* __WINE_WINE_GDI_DRIVER_H */