[PATCH v2 2/5] d3d11: Add initial implementation of SwapDeviceContextState.

[Henri Verbeet]

On Tue, 26 Jan 2021 at 12:15, Rémi Bernon <rbernon at codeweavers.com> wrote:
> @@ -2672,7 +2678,29 @@ static void STDMETHODCALLTYPE d3d11_immediate_context_CSGetConstantBuffers1(ID3D
>  static void STDMETHODCALLTYPE d3d11_immediate_context_SwapDeviceContextState(ID3D11DeviceContext1 *iface,
>          ID3DDeviceContextState *state, ID3DDeviceContextState **prev_state)
>  {
> -    FIXME("iface %p, state %p, prev_state %p stub!\n", iface, state, prev_state);
> +    struct d3d_device_context_state *state_impl;
> +    struct d3d_device *device = device_from_immediate_ID3D11DeviceContext1(iface);
> +
> +    FIXME("iface %p, state %p, prev_state %p semi-stub!\n", iface, state, prev_state);
> +
> +    wined3d_mutex_lock();
> +    if (prev_state)
> +    {
> +        *prev_state = NULL;
> +        if ((state_impl = heap_alloc(sizeof(*state_impl))))
> +        {
> +            d3d_device_context_state_init(state_impl, device, &device->emulated_interface);
> +            *prev_state = &state_impl->ID3DDeviceContextState_iface;
> +        }
> +    }
> +
> +    if ((state_impl = impl_from_ID3DDeviceContextState(state)))
> +    {
> +        device->emulated_interface = state_impl->emulated_interface;
> +        if (d3d_device_is_d3d10_active(device))
> +            FIXME("D3D10 interface emulation not fully implemented yet!\n");
> +    }
> +    wined3d_mutex_unlock();
>  }
>
I don't think it's worth holding the series for, but shouldn't we
store the device context state object here, instead of creating a new
context state object each time? I.e., suppose you do the following:

    ID3DDeviceContextState *a, *b, *prev;
    ...
    SwapDeviceContextState(..., a, &prev);
    SwapDeviceContextState(..., b, &prev);

Is "prev" suppose to be equal to "a" at that point? I don't think the
existing tests cover that.