=?UTF-8?Q?Ri=C4=8Dardas=20Barkauskas=20?=: ddraw: Use unsafe_impl_from_IDirect3DViewport2 for application provided interfaces .

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 38982ddf114aceff064afff88a3d73250be61c80
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=38982ddf114aceff064afff88a3d73250be61c80

Author: Ričardas Barkauskas <miegalius at gmail.com>
Date:   Mon Oct  3 17:14:59 2011 -0500

ddraw: Use unsafe_impl_from_IDirect3DViewport2 for application provided interfaces.

---

 dlls/ddraw/ddraw_private.h |    1 +
 dlls/ddraw/device.c        |    8 ++++----
 dlls/ddraw/viewport.c      |    8 ++++++++
 3 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/dlls/ddraw/ddraw_private.h b/dlls/ddraw/ddraw_private.h
index b50c0bc..e75acc0 100644
--- a/dlls/ddraw/ddraw_private.h
+++ b/dlls/ddraw/ddraw_private.h
@@ -470,6 +470,7 @@ struct IDirect3DViewportImpl
 };
 
 IDirect3DViewportImpl *unsafe_impl_from_IDirect3DViewport3(IDirect3DViewport3 *iface) DECLSPEC_HIDDEN;
+IDirect3DViewportImpl *unsafe_impl_from_IDirect3DViewport2(IDirect3DViewport2 *iface) DECLSPEC_HIDDEN;
 IDirect3DViewportImpl *unsafe_impl_from_IDirect3DViewport(IDirect3DViewport *iface) DECLSPEC_HIDDEN;
 
 /* Helper functions */
diff --git a/dlls/ddraw/device.c b/dlls/ddraw/device.c
index a2e27ac..8cfeac1 100644
--- a/dlls/ddraw/device.c
+++ b/dlls/ddraw/device.c
@@ -771,7 +771,7 @@ static HRESULT WINAPI IDirect3DDeviceImpl_2_AddViewport(IDirect3DDevice2 *iface,
         IDirect3DViewport2 *Direct3DViewport2)
 {
     IDirect3DDeviceImpl *This = device_from_device2(iface);
-    IDirect3DViewportImpl *vp = (IDirect3DViewportImpl *)Direct3DViewport2;
+    IDirect3DViewportImpl *vp = unsafe_impl_from_IDirect3DViewport2(Direct3DViewport2);
 
     TRACE("iface %p, viewport %p.\n", iface, Direct3DViewport2);
 
@@ -832,7 +832,7 @@ static HRESULT WINAPI IDirect3DDeviceImpl_2_DeleteViewport(IDirect3DDevice2 *ifa
         IDirect3DViewport2 *Direct3DViewport2)
 {
     IDirect3DDeviceImpl *This = device_from_device2(iface);
-    IDirect3DViewportImpl *vp = (IDirect3DViewportImpl *)Direct3DViewport2;
+    IDirect3DViewportImpl *vp = unsafe_impl_from_IDirect3DViewport2(Direct3DViewport2);
 
     TRACE("iface %p, viewport %p.\n", iface, Direct3DViewport2);
 
@@ -927,7 +927,7 @@ static HRESULT WINAPI IDirect3DDeviceImpl_2_NextViewport(IDirect3DDevice2 *iface
         IDirect3DViewport2 *Viewport2, IDirect3DViewport2 **lplpDirect3DViewport2, DWORD Flags)
 {
     IDirect3DDeviceImpl *This = device_from_device2(iface);
-    IDirect3DViewportImpl *vp = (IDirect3DViewportImpl *)Viewport2;
+    IDirect3DViewportImpl *vp = unsafe_impl_from_IDirect3DViewport2(Viewport2);
     IDirect3DViewport3 *res;
     HRESULT hr;
 
@@ -1749,7 +1749,7 @@ static HRESULT WINAPI IDirect3DDeviceImpl_2_SetCurrentViewport(IDirect3DDevice2
         IDirect3DViewport2 *Direct3DViewport2)
 {
     IDirect3DDeviceImpl *This = device_from_device2(iface);
-    IDirect3DViewportImpl *vp = (IDirect3DViewportImpl *)Direct3DViewport2;
+    IDirect3DViewportImpl *vp = unsafe_impl_from_IDirect3DViewport2(Direct3DViewport2);
 
     TRACE("iface %p, viewport %p.\n", iface, Direct3DViewport2);
 
diff --git a/dlls/ddraw/viewport.c b/dlls/ddraw/viewport.c
index bbff45b..1becbc7 100644
--- a/dlls/ddraw/viewport.c
+++ b/dlls/ddraw/viewport.c
@@ -1127,6 +1127,14 @@ IDirect3DViewportImpl *unsafe_impl_from_IDirect3DViewport3(IDirect3DViewport3 *i
     return CONTAINING_RECORD(iface, IDirect3DViewportImpl, IDirect3DViewport3_iface);
 }
 
+IDirect3DViewportImpl *unsafe_impl_from_IDirect3DViewport2(IDirect3DViewport2 *iface)
+{
+    /* IDirect3DViewport and IDirect3DViewport3 use the same iface. */
+    if (!iface) return NULL;
+    assert(iface->lpVtbl == (IDirect3DViewport2Vtbl *)&d3d_viewport_vtbl);
+    return CONTAINING_RECORD(iface, IDirect3DViewportImpl, IDirect3DViewport3_iface);
+}
+
 IDirect3DViewportImpl *unsafe_impl_from_IDirect3DViewport(IDirect3DViewport *iface)
 {
     /* IDirect3DViewport and IDirect3DViewport3 use the same iface. */