| Value | Meaning |
|---|---|
| D2D1_THREADING_MODE_SINGLE_THREADEDD2D1_FACTORY_TYPE_SINGLE_THREADED | <summary> Resources may only be invoked serially. Reference counts on resources are interlocked, however, resource and render target state is not protected from multi-threaded access </summary> |
| D2D1_THREADING_MODE_MULTI_THREADEDD2D1_FACTORY_TYPE_MULTI_THREADED | <summary> Resources may be invoked from multiple threads. Resources use interlocked reference counting and their state is protected. </summary> |