ddraw: Use unsafe_impl_from_IDirect3DTexture() for application provided interfaces.

dlls/ddraw/ddraw_private.h

@@ -253,6 +253,8 @@ IDirectDrawSurfaceImpl *unsafe_impl_from_IDirectDrawSurface(IDirectDrawSurface *
 IDirectDrawSurfaceImpl *unsafe_impl_from_IDirectDrawSurface4(IDirectDrawSurface4 *iface) DECLSPEC_HIDDEN;
 IDirectDrawSurfaceImpl *unsafe_impl_from_IDirectDrawSurface7(IDirectDrawSurface7 *iface) DECLSPEC_HIDDEN;
 
+IDirectDrawSurfaceImpl *unsafe_impl_from_IDirect3DTexture(IDirect3DTexture *iface) DECLSPEC_HIDDEN;
+
 /* Get the number of bytes per pixel for a given surface */
 #define PFGET_BPP(pf) (pf.dwFlags&DDPF_PALETTEINDEXED8?1:((pf.dwRGBBitCount+7)/8))
 #define GET_BPP(desc) PFGET_BPP(desc.ddpfPixelFormat)

dlls/ddraw/device.c

@@ -568,8 +568,8 @@ static HRESULT WINAPI IDirect3DDeviceImpl_1_SwapTextureHandles(IDirect3DDevice *
         IDirect3DTexture *D3DTex1, IDirect3DTexture *D3DTex2)
 {
     IDirect3DDeviceImpl *This = device_from_device1(iface);
-    IDirectDrawSurfaceImpl *surf1 = surface_from_texture1(D3DTex1);
-    IDirectDrawSurfaceImpl *surf2 = surface_from_texture1(D3DTex2);
+    IDirectDrawSurfaceImpl *surf1 = unsafe_impl_from_IDirect3DTexture(D3DTex1);
+    IDirectDrawSurfaceImpl *surf2 = unsafe_impl_from_IDirect3DTexture(D3DTex2);
     IDirect3DTexture2 *t1 = surf1 ? (IDirect3DTexture2 *)&surf1->IDirect3DTexture2_vtbl : NULL;
     IDirect3DTexture2 *t2 = surf2 ? (IDirect3DTexture2 *)&surf2->IDirect3DTexture2_vtbl : NULL;
 

dlls/ddraw/surface.c

@@ -4703,10 +4703,11 @@ static HRESULT WINAPI d3d_texture2_Load(IDirect3DTexture2 *iface, IDirect3DTextu
 
 static HRESULT WINAPI d3d_texture1_Load(IDirect3DTexture *iface, IDirect3DTexture *src_texture)
 {
+    IDirectDrawSurfaceImpl* src_surface = unsafe_impl_from_IDirect3DTexture(src_texture);
     TRACE("iface %p, src_texture %p.\n", iface, src_texture);
 
     return d3d_texture2_Load((IDirect3DTexture2 *)&surface_from_texture1(iface)->IDirect3DTexture2_vtbl,
-            src_texture ? (IDirect3DTexture2 *)&surface_from_texture1(src_texture)->IDirect3DTexture2_vtbl : NULL);
+            src_surface ? (IDirect3DTexture2 *)&src_surface->IDirect3DTexture2_vtbl : NULL);
 }
 
 /*****************************************************************************
@@ -5028,6 +5029,13 @@ IDirectDrawSurfaceImpl *unsafe_impl_from_IDirectDrawSurface(IDirectDrawSurface *
     return CONTAINING_RECORD(iface, IDirectDrawSurfaceImpl, IDirectDrawSurface_iface);
 }
 
+IDirectDrawSurfaceImpl *unsafe_impl_from_IDirect3DTexture(IDirect3DTexture *iface)
+{
+    if (!iface) return NULL;
+    assert(iface->lpVtbl == &d3d_texture1_vtbl);
+    return CONTAINING_RECORD(iface, IDirectDrawSurfaceImpl, IDirect3DTexture_vtbl);
+}
+
 static void STDMETHODCALLTYPE ddraw_surface_wined3d_object_destroyed(void *parent)
 {
     IDirectDrawSurfaceImpl *surface = parent;