[PATCH v2 3/3] dwmapi: Add partial implementation of DWMWA_EXTENDED_FRAME_BOUNDS.

[Gabriel Ivăncescu]

Signed-off-by: Gabriel Ivăncescu <gabrielopcode at gmail.com>
---

This stops Unity games like Variables (steam appid 1054800) from complaining
when changing full-screen mode.

 dlls/dwmapi/Makefile.in    |  1 +
 dlls/dwmapi/dwmapi_main.c  |  7 +++++++
 dlls/dwmapi/tests/dwmapi.c | 14 ++++++++++++++
 3 files changed, 22 insertions(+)

diff --git a/dlls/dwmapi/Makefile.in b/dlls/dwmapi/Makefile.in
index 3a36913..d273a22 100644
--- a/dlls/dwmapi/Makefile.in
+++ b/dlls/dwmapi/Makefile.in
@@ -1,5 +1,6 @@
 MODULE    = dwmapi.dll
 IMPORTLIB = dwmapi
+IMPORTS   = user32
 
 EXTRADLLFLAGS = -mno-cygwin
 
diff --git a/dlls/dwmapi/dwmapi_main.c b/dlls/dwmapi/dwmapi_main.c
index e976fda..212c88c 100644
--- a/dlls/dwmapi/dwmapi_main.c
+++ b/dlls/dwmapi/dwmapi_main.c
@@ -217,6 +217,13 @@ HRESULT WINAPI DwmGetWindowAttribute(HWND hwnd, DWORD attribute, PVOID pv_attrib
         *(BOOL*)(pv_attribute) = FALSE;
         break;
 
+    case DWMWA_EXTENDED_FRAME_BOUNDS:
+        if (size < sizeof(RECT)) return HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
+
+        WARN("DWMWA_EXTENDED_FRAME_BOUNDS: returning window rect.\n");
+        GetWindowRect(hwnd, pv_attribute);
+        break;
+
     case DWMWA_CLOAKED:
         if (size < sizeof(DWORD)) return E_INVALIDARG;
 
diff --git a/dlls/dwmapi/tests/dwmapi.c b/dlls/dwmapi/tests/dwmapi.c
index 0fc8820..409f5c8 100644
--- a/dlls/dwmapi/tests/dwmapi.c
+++ b/dlls/dwmapi/tests/dwmapi.c
@@ -29,6 +29,7 @@ static LRESULT WINAPI test_wndproc(HWND hwnd, UINT message, WPARAM wParam, LPARA
 static void test_DwmGetWindowAttribute(void)
 {
     BOOL nc_rendering;
+    RECT rc, rc2;
     HRESULT hr;
 
     hr = DwmGetWindowAttribute(NULL, DWMWA_NCRENDERING_ENABLED, &nc_rendering, sizeof(nc_rendering));
@@ -45,6 +46,19 @@ static void test_DwmGetWindowAttribute(void)
     hr = DwmGetWindowAttribute(test_wnd, DWMWA_NCRENDERING_ENABLED, &nc_rendering, sizeof(nc_rendering));
     ok(hr == S_OK, "DwmGetWindowAttribute(DWMWA_NCRENDERING_ENABLED) failed 0x%08x.\n", hr);
     ok(nc_rendering == FALSE || nc_rendering == TRUE, "non-boolean value 0x%x.\n", nc_rendering);
+
+    hr = DwmGetWindowAttribute(test_wnd, DWMWA_EXTENDED_FRAME_BOUNDS, &rc, sizeof(rc) - 1);
+    ok(hr == HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER) || broken(hr == E_INVALIDARG) /* Vista */,
+       "DwmGetWindowAttribute(DWMWA_EXTENDED_FRAME_BOUNDS) returned 0x%08x.\n", hr);
+    hr = DwmGetWindowAttribute(test_wnd, DWMWA_EXTENDED_FRAME_BOUNDS, &rc, sizeof(rc));
+    if (hr != E_HANDLE && hr != DWM_E_COMPOSITIONDISABLED /* Vista */)  /* composition is on */
+    {
+        /* For top-level Windows, the returned rect is always at least as large as GetWindowRect */
+        GetWindowRect(test_wnd, &rc2);
+        ok(hr == S_OK, "DwmGetWindowAttribute(DWMWA_EXTENDED_FRAME_BOUNDS) failed 0x%08x.\n", hr);
+        ok(rc.left >= rc2.left && rc.right <= rc2.right && rc.top >= rc2.top && rc.bottom <= rc2.bottom,
+           "returned rect %s not enclosed in window rect %s.\n", wine_dbgstr_rect(&rc), wine_dbgstr_rect(&rc2));
+    }
 }
 
 START_TEST(dwmapi)
-- 
2.21.0