Ričardas Barkauskas : ddraw: Use unsafe_impl_from_IDirectDrawSurface4.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 4582562f5504e4edf8bccaa9255924f69ddf7f65
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=4582562f5504e4edf8bccaa9255924f69ddf7f65

Author: Ričardas Barkauskas <rbarkauskas at codeweavers.com>
Date:   Mon Jun  6 14:08:23 2011 +0300

ddraw: Use unsafe_impl_from_IDirectDrawSurface4.

---

 dlls/ddraw/ddraw.c         |    4 ++--
 dlls/ddraw/ddraw_private.h |    1 +
 dlls/ddraw/device.c        |    2 +-
 dlls/ddraw/surface.c       |    7 +++++++
 4 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/dlls/ddraw/ddraw.c b/dlls/ddraw/ddraw.c
index a8f5418..a265afd 100644
--- a/dlls/ddraw/ddraw.c
+++ b/dlls/ddraw/ddraw.c
@@ -4243,7 +4243,7 @@ static HRESULT WINAPI ddraw4_DuplicateSurface(IDirectDraw4 *iface, IDirectDrawSu
         IDirectDrawSurface4 **dst)
 {
     IDirectDrawImpl *This = impl_from_IDirectDraw4(iface);
-    IDirectDrawSurfaceImpl *src_impl = (IDirectDrawSurfaceImpl *)src;
+    IDirectDrawSurfaceImpl *src_impl = unsafe_impl_from_IDirectDrawSurface4(src);
     IDirectDrawSurface7 *dst7;
     IDirectDrawSurfaceImpl *dst_impl;
     HRESULT hr;
@@ -4879,7 +4879,7 @@ static HRESULT WINAPI d3d3_CreateDevice(IDirect3D3 *iface, REFCLSID riid,
         IDirectDrawSurface4 *surface, IDirect3DDevice3 **device, IUnknown *outer_unknown)
 {
     IDirectDrawImpl *This = impl_from_IDirect3D3(iface);
-    IDirectDrawSurfaceImpl *surface_impl = (IDirectDrawSurfaceImpl *)surface;
+    IDirectDrawSurfaceImpl *surface_impl = unsafe_impl_from_IDirectDrawSurface4(surface);
     HRESULT hr;
 
     TRACE("iface %p, riid %s, surface %p, device %p, outer_unknown %p.\n",
diff --git a/dlls/ddraw/ddraw_private.h b/dlls/ddraw/ddraw_private.h
index 3a8ba04..ff7e2ed 100644
--- a/dlls/ddraw/ddraw_private.h
+++ b/dlls/ddraw/ddraw_private.h
@@ -231,6 +231,7 @@ static inline IDirectDrawSurfaceImpl *impl_from_IDirectDrawSurface7(IDirectDrawS
 }
 
 IDirectDrawSurfaceImpl *unsafe_impl_from_IDirectDrawSurface3(IDirectDrawSurface3 *iface) DECLSPEC_HIDDEN;
+IDirectDrawSurfaceImpl *unsafe_impl_from_IDirectDrawSurface4(IDirectDrawSurface4 *iface) DECLSPEC_HIDDEN;
 IDirectDrawSurfaceImpl *unsafe_impl_from_IDirectDrawSurface7(IDirectDrawSurface7 *iface) DECLSPEC_HIDDEN;
 
 /* Get the number of bytes per pixel for a given surface */
diff --git a/dlls/ddraw/device.c b/dlls/ddraw/device.c
index e0569e7..28477b0 100644
--- a/dlls/ddraw/device.c
+++ b/dlls/ddraw/device.c
@@ -1889,7 +1889,7 @@ static HRESULT WINAPI IDirect3DDeviceImpl_3_SetRenderTarget(IDirect3DDevice3 *if
         IDirectDrawSurface4 *NewRenderTarget, DWORD Flags)
 {
     IDirect3DDeviceImpl *This = device_from_device3(iface);
-    IDirectDrawSurfaceImpl *Target = (IDirectDrawSurfaceImpl *)NewRenderTarget;
+    IDirectDrawSurfaceImpl *Target = unsafe_impl_from_IDirectDrawSurface4(NewRenderTarget);
 
     TRACE("iface %p, target %p, flags %#x.\n", iface, NewRenderTarget, Flags);
 
diff --git a/dlls/ddraw/surface.c b/dlls/ddraw/surface.c
index f5f5ceb..5e57518 100644
--- a/dlls/ddraw/surface.c
+++ b/dlls/ddraw/surface.c
@@ -3465,6 +3465,13 @@ IDirectDrawSurfaceImpl *unsafe_impl_from_IDirectDrawSurface7(IDirectDrawSurface7
     return CONTAINING_RECORD(iface, IDirectDrawSurfaceImpl, IDirectDrawSurface7_iface);
 }
 
+IDirectDrawSurfaceImpl *unsafe_impl_from_IDirectDrawSurface4(IDirectDrawSurface4 *iface)
+{
+    if (!iface) return NULL;
+    assert(iface->lpVtbl == (struct IDirectDrawSurface4Vtbl *)&ddraw_surface7_vtbl);
+    return CONTAINING_RECORD(iface, IDirectDrawSurfaceImpl, IDirectDrawSurface7_iface);
+}
+
 IDirectDrawSurfaceImpl *unsafe_impl_from_IDirectDrawSurface3(IDirectDrawSurface3 *iface)
 {
     if (!iface) return NULL;