quartz/vmr9: Return E_INVALIDARG if both texture and offscreen flags are passed…

dlls/quartz/tests/vmr9.c

@@ -2760,6 +2760,13 @@ static void test_allocate_surface_helper(void)
 
     IDirect3DSurface9_Release(surfaces[0]);
 
+    info.Format = D3DFMT_A8R8G8B8;
+    info.dwFlags = VMR9AllocFlag_OffscreenSurface | VMR9AllocFlag_TextureSurface;
+    count = 1;
+    hr = IVMRSurfaceAllocatorNotify9_AllocateSurfaceHelper(notify, &info, &count, surfaces);
+    ok(hr == E_INVALIDARG, "Got hr %#x.\n", hr);
+    ok(count == 1, "Got count %u.\n", count);
+
 out:
     IVMRSurfaceAllocatorNotify9_Release(notify);
     ref = IBaseFilter_Release(filter);

dlls/quartz/vmr9.c

@@ -2042,6 +2042,13 @@ static HRESULT WINAPI VMR9SurfaceAllocatorNotify_AllocateSurfaceHelper(IVMRSurfa
             allocinfo->dwFlags, allocinfo->dwWidth, allocinfo->dwHeight,
             allocinfo->Format, allocinfo->Format, allocinfo->Pool, allocinfo->MinBuffers);
 
+    if ((allocinfo->dwFlags & VMR9AllocFlag_TextureSurface)
+            && (allocinfo->dwFlags & VMR9AllocFlag_OffscreenSurface))
+    {
+        WARN("Invalid flags specified; returning E_INVALIDARG.\n");
+        return E_INVALIDARG;
+    }
+
     if (!allocinfo->Format)
     {
         IDirect3DSurface9 *backbuffer;