ddraw: Use unsafe_impl_from_IDirect3DVertexBuffer() for app provided ifaces.

dlls/ddraw/ddraw_private.h

@@ -536,6 +536,8 @@ struct IDirect3DVertexBufferImpl
 
 HRESULT d3d_vertex_buffer_create(IDirect3DVertexBufferImpl **vertex_buf, IDirectDrawImpl *ddraw,
         D3DVERTEXBUFFERDESC *desc) DECLSPEC_HIDDEN;
+IDirect3DVertexBufferImpl *unsafe_impl_from_IDirect3DVertexBuffer(IDirect3DVertexBuffer *iface) DECLSPEC_HIDDEN;
+IDirect3DVertexBufferImpl *unsafe_impl_from_IDirect3DVertexBuffer7(IDirect3DVertexBuffer7 *iface) DECLSPEC_HIDDEN;
 
 static inline IDirect3DVertexBufferImpl *vb_from_vb1(IDirect3DVertexBuffer *iface)
 {

dlls/ddraw/device.c

@@ -4053,7 +4053,7 @@ IDirect3DDeviceImpl_7_DrawPrimitiveVB(IDirect3DDevice7 *iface,
                                       DWORD Flags)
 {
     IDirect3DDeviceImpl *This = (IDirect3DDeviceImpl *)iface;
-    IDirect3DVertexBufferImpl *vb = (IDirect3DVertexBufferImpl *)D3DVertexBuf;
+    IDirect3DVertexBufferImpl *vb = unsafe_impl_from_IDirect3DVertexBuffer7(D3DVertexBuf);
     HRESULT hr;
     DWORD stride;
 
@@ -4126,7 +4126,7 @@ static HRESULT WINAPI IDirect3DDeviceImpl_3_DrawPrimitiveVB(IDirect3DDevice3 *if
         D3DPRIMITIVETYPE PrimitiveType, IDirect3DVertexBuffer *D3DVertexBuf, DWORD StartVertex,
         DWORD NumVertices, DWORD Flags)
 {
-    IDirect3DVertexBufferImpl *vb = D3DVertexBuf ? vb_from_vb1(D3DVertexBuf) : NULL;
+    IDirect3DVertexBufferImpl *vb = unsafe_impl_from_IDirect3DVertexBuffer(D3DVertexBuf);
 
     TRACE("iface %p, primitive_type %#x, vb %p, start_vertex %u, vertex_count %u, flags %#x.\n",
             iface, PrimitiveType, D3DVertexBuf, StartVertex, NumVertices, Flags);
@@ -4164,7 +4164,7 @@ IDirect3DDeviceImpl_7_DrawIndexedPrimitiveVB(IDirect3DDevice7 *iface,
                                              DWORD Flags)
 {
     IDirect3DDeviceImpl *This = (IDirect3DDeviceImpl *)iface;
-    IDirect3DVertexBufferImpl *vb = (IDirect3DVertexBufferImpl *)D3DVertexBuf;
+    IDirect3DVertexBufferImpl *vb = unsafe_impl_from_IDirect3DVertexBuffer7(D3DVertexBuf);
     DWORD stride = get_flexible_vertex_size(vb->fvf);
     struct wined3d_resource *wined3d_resource;
     struct wined3d_resource_desc desc;
@@ -4288,13 +4288,13 @@ static HRESULT WINAPI IDirect3DDeviceImpl_3_DrawIndexedPrimitiveVB(IDirect3DDevi
         D3DPRIMITIVETYPE PrimitiveType, IDirect3DVertexBuffer *D3DVertexBuf, WORD *Indices,
         DWORD IndexCount, DWORD Flags)
 {
-    IDirect3DVertexBufferImpl *VB = vb_from_vb1(D3DVertexBuf);
+    IDirect3DVertexBufferImpl *vb = unsafe_impl_from_IDirect3DVertexBuffer(D3DVertexBuf);
 
     TRACE("iface %p, primitive_type %#x, vb %p, indices %p, index_count %u, flags %#x.\n",
             iface, PrimitiveType, D3DVertexBuf, Indices, IndexCount, Flags);
 
     return IDirect3DDevice7_DrawIndexedPrimitiveVB((IDirect3DDevice7 *)device_from_device3(iface),
-            PrimitiveType, (IDirect3DVertexBuffer7 *)VB, 0, IndexCount, Indices, IndexCount, Flags);
+            PrimitiveType, (IDirect3DVertexBuffer7 *)vb, 0, IndexCount, Indices, IndexCount, Flags);
 }
 
 /*****************************************************************************

dlls/ddraw/vertexbuffer.c

@@ -289,18 +289,12 @@ static HRESULT WINAPI IDirect3DVertexBufferImpl_1_Unlock(IDirect3DVertexBuffer *
  *  DDERR_INVALIDPARAMS If D3DVOP_TRANSFORM wasn't passed
  *
  *****************************************************************************/
-static HRESULT WINAPI
-IDirect3DVertexBufferImpl_ProcessVertices(IDirect3DVertexBuffer7 *iface,
-                                          DWORD VertexOp,
-                                          DWORD DestIndex,
-                                          DWORD Count,
-                                          IDirect3DVertexBuffer7 *SrcBuffer,
-                                          DWORD SrcIndex,
-                                          IDirect3DDevice7 *D3DDevice,
-                                          DWORD Flags)
+static HRESULT WINAPI IDirect3DVertexBufferImpl_ProcessVertices(IDirect3DVertexBuffer7 *iface,
+        DWORD VertexOp, DWORD DestIndex, DWORD Count, IDirect3DVertexBuffer7 *SrcBuffer,
+        DWORD SrcIndex, IDirect3DDevice7 *D3DDevice, DWORD Flags)
 {
     IDirect3DVertexBufferImpl *This = (IDirect3DVertexBufferImpl *)iface;
-    IDirect3DVertexBufferImpl *Src = (IDirect3DVertexBufferImpl *)SrcBuffer;
+    IDirect3DVertexBufferImpl *Src = unsafe_impl_from_IDirect3DVertexBuffer7(SrcBuffer);
     IDirect3DDeviceImpl *D3D = (IDirect3DDeviceImpl *)D3DDevice;
     BOOL oldClip, doClip;
     HRESULT hr;
@@ -347,7 +341,7 @@ static HRESULT WINAPI IDirect3DVertexBufferImpl_1_ProcessVertices(IDirect3DVerte
         DWORD VertexOp, DWORD DestIndex, DWORD Count, IDirect3DVertexBuffer *SrcBuffer,
         DWORD SrcIndex, IDirect3DDevice3 *D3DDevice, DWORD Flags)
 {
-    IDirect3DVertexBufferImpl *Src = SrcBuffer ? vb_from_vb1(SrcBuffer) : NULL;
+    IDirect3DVertexBufferImpl *Src = unsafe_impl_from_IDirect3DVertexBuffer(SrcBuffer);
     IDirect3DDeviceImpl *D3D = D3DDevice ? device_from_device3(D3DDevice) : NULL;
 
     TRACE("iface %p, vertex_op %#x, dst_idx %u, count %u, src_buffer %p, src_idx %u, device %p, flags %#x.\n",
@@ -587,3 +581,21 @@ end:
 
     return hr;
 }
+
+IDirect3DVertexBufferImpl *unsafe_impl_from_IDirect3DVertexBuffer(IDirect3DVertexBuffer *iface)
+{
+    if (!iface)
+        return NULL;
+    assert(iface->lpVtbl == &d3d_vertex_buffer1_vtbl);
+
+    return vb_from_vb1(iface);
+}
+
+IDirect3DVertexBufferImpl *unsafe_impl_from_IDirect3DVertexBuffer7(IDirect3DVertexBuffer7 *iface)
+{
+    if (!iface)
+        return NULL;
+    assert(iface->lpVtbl == &d3d_vertex_buffer7_vtbl);
+
+    return (IDirect3DVertexBufferImpl *)iface;
+}