[PATCH v2] wined3d: Validate window before setting fullscreen mode

[Andrew Eikum]

Signed-off-by: Andrew Eikum <aeikum at codeweavers.com>
---
The main point here is that calling SetFullscreenState with the state
that is already set succeeds, even if the window is destroyed. Unreal
Engine 4 games depend on this, and Wine already passes this test.

The code changes are for the failure case, when trying to change the
state on a destroyed window.  I don't have a game that depends on
this, so if you'd prefer a todo_wine and no code changes, I'm fine
with that, too.

v2: Fix problems spotted by Józef

 dlls/dxgi/swapchain.c    |  2 ++
 dlls/dxgi/tests/dxgi.c   |  6 +++++-
 dlls/wined3d/swapchain.c | 12 ++++++++++++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/dlls/dxgi/swapchain.c b/dlls/dxgi/swapchain.c
index 83e0f25674..ac40eb78f6 100644
--- a/dlls/dxgi/swapchain.c
+++ b/dlls/dxgi/swapchain.c
@@ -254,6 +254,8 @@ static HRESULT STDMETHODCALLTYPE DECLSPEC_HOTPATCH d3d11_swapchain_SetFullscreen
         swapchain->target = target;
         return S_OK;
     }
+    else
+        hr = DXGI_ERROR_NOT_CURRENTLY_AVAILABLE;
 
     if (target)
         IDXGIOutput_Release(target);
diff --git a/dlls/dxgi/tests/dxgi.c b/dlls/dxgi/tests/dxgi.c
index 56065456eb..fc008ccdd7 100644
--- a/dlls/dxgi/tests/dxgi.c
+++ b/dlls/dxgi/tests/dxgi.c
@@ -2162,10 +2162,14 @@ static void test_set_fullscreen(void)
     }
     hr = IDXGISwapChain_SetFullscreenState(swapchain, FALSE, NULL);
     ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+    DestroyWindow(swapchain_desc.OutputWindow);
+    hr = IDXGISwapChain_SetFullscreenState(swapchain, FALSE, NULL);
+    ok(hr == S_OK, "Got unexpected hr %#x.\n", hr);
+    hr = IDXGISwapChain_SetFullscreenState(swapchain, TRUE, NULL);
+    ok(hr == DXGI_ERROR_NOT_CURRENTLY_AVAILABLE, "Got unexpected hr %#x.\n", hr);
     refcount = IDXGISwapChain_Release(swapchain);
     ok(!refcount, "IDXGISwapChain has %u references left.\n", refcount);
 
-    DestroyWindow(swapchain_desc.OutputWindow);
     swapchain_desc.OutputWindow = CreateWindowA("static", "dxgi_test", 0, 0, 0, 400, 200, 0, 0, 0, 0);
     check_window_fullscreen_state(swapchain_desc.OutputWindow, &initial_state.fullscreen_state);
     hr = IDXGIFactory_CreateSwapChain(factory, (IUnknown *)device, &swapchain_desc, &swapchain);
diff --git a/dlls/wined3d/swapchain.c b/dlls/wined3d/swapchain.c
index 8200bdd5e0..dc7bb641b3 100644
--- a/dlls/wined3d/swapchain.c
+++ b/dlls/wined3d/swapchain.c
@@ -1400,6 +1400,10 @@ HRESULT CDECL wined3d_swapchain_set_fullscreen(struct wined3d_swapchain *swapcha
         {
             /* Switch from windowed to fullscreen */
             HWND focus_window = device->create_parms.focus_window;
+
+            if (!IsWindow(swapchain->device_window))
+                return WINED3DERR_NOTAVAILABLE;
+
             if (!focus_window)
                 focus_window = swapchain->device_window;
             if (FAILED(hr = wined3d_device_acquire_focus_window(device, focus_window)))
@@ -1414,6 +1418,10 @@ HRESULT CDECL wined3d_swapchain_set_fullscreen(struct wined3d_swapchain *swapcha
         {
             /* Fullscreen -> fullscreen mode change */
             BOOL filter_messages = device->filter_messages;
+
+            if (!IsWindow(swapchain->device_window))
+                return WINED3DERR_NOTAVAILABLE;
+
             device->filter_messages = TRUE;
 
             MoveWindow(swapchain->device_window, 0, 0, width, height, TRUE);
@@ -1427,6 +1435,10 @@ HRESULT CDECL wined3d_swapchain_set_fullscreen(struct wined3d_swapchain *swapcha
     {
         /* Fullscreen -> windowed switch */
         RECT *window_rect = NULL;
+
+        if (!IsWindow(swapchain->device_window))
+            return WINED3DERR_NOTAVAILABLE;
+
         if (swapchain->desc.flags & WINED3D_SWAPCHAIN_RESTORE_WINDOW_RECT)
             window_rect = &swapchain->original_window_rect;
         wined3d_device_restore_fullscreen_window(device, swapchain->device_window, window_rect);
-- 
2.18.0