=?UTF-8?Q?Ri=C4=8Dardas=20Barkauskas=20?=: ddraw: Use unsafe_impl_from_IDirect3DDevice for application provided interfaces.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: d19e416dee0d9d12725b025a1dd1572b8f79a471
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=d19e416dee0d9d12725b025a1dd1572b8f79a471

Author: Ričardas Barkauskas <rbarkauskas at codeweavers.com>
Date:   Mon Oct 17 16:56:43 2011 +0300

ddraw: Use unsafe_impl_from_IDirect3DDevice for application provided interfaces.

---

 dlls/ddraw/ddraw_private.h |    2 ++
 dlls/ddraw/device.c        |    7 +++++++
 dlls/ddraw/material.c      |    9 +++++----
 dlls/ddraw/surface.c       |    5 +++--
 4 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/dlls/ddraw/ddraw_private.h b/dlls/ddraw/ddraw_private.h
index 4fb6fc4..a0a0fe4 100644
--- a/dlls/ddraw/ddraw_private.h
+++ b/dlls/ddraw/ddraw_private.h
@@ -340,6 +340,8 @@ static inline IDirect3DDeviceImpl *device_from_device3(IDirect3DDevice3 *iface)
     return (IDirect3DDeviceImpl *)((char*)iface - FIELD_OFFSET(IDirect3DDeviceImpl, IDirect3DDevice3_vtbl));
 }
 
+IDirect3DDeviceImpl *unsafe_impl_from_IDirect3DDevice(IDirect3DDevice *iface) DECLSPEC_HIDDEN;
+
 /*****************************************************************************
  * IDirectDrawClipper implementation structure
  *****************************************************************************/
diff --git a/dlls/ddraw/device.c b/dlls/ddraw/device.c
index 8cfeac1..da74128 100644
--- a/dlls/ddraw/device.c
+++ b/dlls/ddraw/device.c
@@ -6732,6 +6732,13 @@ static const struct IDirect3DDeviceVtbl d3d_device1_vtbl =
     IDirect3DDeviceImpl_1_GetDirect3D
 };
 
+IDirect3DDeviceImpl *unsafe_impl_from_IDirect3DDevice(IDirect3DDevice *iface)
+{
+    if (!iface) return NULL;
+    assert(iface->lpVtbl == &d3d_device1_vtbl);
+    return CONTAINING_RECORD(iface, IDirect3DDeviceImpl, IDirect3DDevice_vtbl);
+}
+
 /*****************************************************************************
  * IDirect3DDeviceImpl_UpdateDepthStencil
  *
diff --git a/dlls/ddraw/material.c b/dlls/ddraw/material.c
index 9fca200..f873726 100644
--- a/dlls/ddraw/material.c
+++ b/dlls/ddraw/material.c
@@ -335,14 +335,15 @@ static HRESULT WINAPI IDirect3DMaterialImpl_2_GetHandle(IDirect3DMaterial2 *ifac
 }
 
 static HRESULT WINAPI IDirect3DMaterialImpl_1_GetHandle(IDirect3DMaterial *iface,
-        IDirect3DDevice *lpDirect3DDevice, D3DMATERIALHANDLE *lpHandle)
+        IDirect3DDevice *device, D3DMATERIALHANDLE *handle)
 {
     IDirect3DMaterialImpl *This = impl_from_IDirect3DMaterial(iface);
+    IDirect3DDeviceImpl *device_impl = unsafe_impl_from_IDirect3DDevice(device);
 
-    TRACE("iface %p, device %p, handle %p.\n", iface, lpDirect3DDevice, lpHandle);
+    TRACE("iface %p, device %p, handle %p.\n", iface, device, handle);
 
-    return IDirect3DMaterial3_GetHandle(&This->IDirect3DMaterial3_iface, lpDirect3DDevice ?
-            (IDirect3DDevice3 *)&device_from_device1(lpDirect3DDevice)->IDirect3DDevice3_vtbl : NULL, lpHandle);
+    return IDirect3DMaterial3_GetHandle(&This->IDirect3DMaterial3_iface, device_impl ?
+            (IDirect3DDevice3 *)&device_impl->IDirect3DDevice3_vtbl : NULL, handle);
 }
 
 static HRESULT WINAPI IDirect3DMaterialImpl_2_QueryInterface(IDirect3DMaterial2 *iface, REFIID riid,
diff --git a/dlls/ddraw/surface.c b/dlls/ddraw/surface.c
index 24d0497..f14374a 100644
--- a/dlls/ddraw/surface.c
+++ b/dlls/ddraw/surface.c
@@ -4551,11 +4551,12 @@ static HRESULT WINAPI d3d_texture1_GetHandle(IDirect3DTexture *iface,
         IDirect3DDevice *device, D3DTEXTUREHANDLE *handle)
 {
     IDirectDrawSurfaceImpl *This = impl_from_IDirect3DTexture(iface);
-    IDirect3DDevice2 *device2 = (IDirect3DDevice2 *)&device_from_device1(device)->IDirect3DDevice2_vtbl;
+    IDirect3DDeviceImpl *device_impl = unsafe_impl_from_IDirect3DDevice(device);
 
     TRACE("iface %p, device %p, handle %p.\n", iface, device, handle);
 
-    return d3d_texture2_GetHandle(&This->IDirect3DTexture2_iface, device2, handle);
+    return d3d_texture2_GetHandle(&This->IDirect3DTexture2_iface,
+            device_impl ? (IDirect3DDevice2 *)&device_impl->IDirect3DDevice2_vtbl : NULL, handle);
 }
 
 /*****************************************************************************