Henri Verbeet : d3d9: Properly retrieve an interface pointer in IDirect3DDevice9Impl_GetBackBuffer ().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: fb5bc7240860fb5e603616be969729ef355e81f3
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=fb5bc7240860fb5e603616be969729ef355e81f3

Author: Henri Verbeet <hverbeet at codeweavers.com>
Date:   Tue Apr 24 20:54:13 2012 +0200

d3d9: Properly retrieve an interface pointer in IDirect3DDevice9Impl_GetBackBuffer().

---

 dlls/d3d9/device.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/dlls/d3d9/device.c b/dlls/d3d9/device.c
index ddfaae6..20635a0 100644
--- a/dlls/d3d9/device.c
+++ b/dlls/d3d9/device.c
@@ -596,6 +596,7 @@ static HRESULT WINAPI IDirect3DDevice9Impl_GetBackBuffer(IDirect3DDevice9Ex *ifa
 {
     IDirect3DDevice9Impl *This = impl_from_IDirect3DDevice9Ex(iface);
     struct wined3d_surface *wined3d_surface = NULL;
+    IDirect3DSurface9Impl *surface_impl;
     HRESULT hr;
 
     TRACE("iface %p, swapchain %u, backbuffer_idx %u, backbuffer_type %#x, backbuffer %p.\n",
@@ -606,7 +607,8 @@ static HRESULT WINAPI IDirect3DDevice9Impl_GetBackBuffer(IDirect3DDevice9Ex *ifa
             BackBuffer, (enum wined3d_backbuffer_type)Type, &wined3d_surface);
     if (SUCCEEDED(hr) && wined3d_surface && ppBackBuffer)
     {
-        *ppBackBuffer = wined3d_surface_get_parent(wined3d_surface);
+        surface_impl = wined3d_surface_get_parent(wined3d_surface);
+        *ppBackBuffer = &surface_impl->IDirect3DSurface9_iface;
         IDirect3DSurface9_AddRef(*ppBackBuffer);
         wined3d_surface_decref(wined3d_surface);
     }