[PATCH v2 0/1] MR4373: user32: Add stubs for GetWindowDpiHostingBehavior and SetThreadDpiHostingBehavior

[Paweł Ulita (＠pawelulita)]

Recent versions of Native Instruments Kontakt 7 introduced some additional HiDPI features. To do this, Kontakt calls 2 functions in `user32.dll` that Wine hasn't implemented yet: `GetWindowDpiHostingBehavior` and `SetThreadDpiHostingBehavior`. This patch adds stubs for these 2 functions and apparently that's enough for Kontakt.

This is my first contribution to Wine, I'm not 100% sure if everything is like it should be.

--
  v2: user32: Add stubs for GetWindowDpiHostingBehavior and SetThreadDpiHostingBehavior

https://gitlab.winehq.org/wine/wine/-/merge_requests/4373

[PATCH v2 1/1] user32: Add stubs for GetWindowDpiHostingBehavior and SetThreadDpiHostingBehavior

[Paweł Ulita]

From: Paweł Ulita

This prevents Native Instruments Kontakt 7 from crashing on start-up.
---
 dlls/user32/sysparams.c |  9 +++++++++
 dlls/user32/user32.spec |  2 ++
 dlls/user32/win.c       | 10 ++++++++++
 include/windef.h        |  6 ++++++
 include/winuser.h       |  2 ++
 5 files changed, 29 insertions(+)

diff --git a/dlls/user32/sysparams.c b/dlls/user32/sysparams.c
index 5ededfee62a..bc78c1fef88 100644
--- a/dlls/user32/sysparams.c
+++ b/dlls/user32/sysparams.c
@@ -746,6 +746,15 @@ DPI_AWARENESS_CONTEXT WINAPI SetThreadDpiAwarenessContext( DPI_AWARENESS_CONTEXT
     return ULongToHandle( prev );
 }

+/**********************************************************************
+ *              SetThreadDpiHostingBehavior   (USER32.@)
+ */
+DPI_HOSTING_BEHAVIOR WINAPI SetThreadDpiHostingBehavior( DPI_HOSTING_BEHAVIOR value )
+{
+    FIXME("(%d): stub\n", value);
+    return DPI_HOSTING_BEHAVIOR_DEFAULT;
+}
+
 /***********************************************************************
  *		MonitorFromRect (USER32.@)
  */
diff --git a/dlls/user32/user32.spec b/dlls/user32/user32.spec
index 96e6e1a7d6b..9f9f03041b4 100644
--- a/dlls/user32/user32.spec
+++ b/dlls/user32/user32.spec
@@ -410,6 +410,7 @@
 @ stdcall GetWindowDC(long) NtUserGetWindowDC
 @ stdcall GetWindowDisplayAffinity(long ptr)
 @ stdcall GetWindowDpiAwarenessContext(long)
+@ stdcall GetWindowDpiHostingBehavior(long)
 @ stdcall GetWindowInfo(long ptr)
 @ stdcall GetWindowLongA(long long)
 @ stdcall -arch=win64 GetWindowLongPtrA(long long)
@@ -719,6 +720,7 @@
 @ stdcall SetTaskmanWindow (long)
 @ stdcall SetThreadDesktop(long) NtUserSetThreadDesktop
 @ stdcall SetThreadDpiAwarenessContext(ptr)
+@ stdcall SetThreadDpiHostingBehavior(ptr)
 @ stdcall SetTimer(long long long ptr)
 @ stdcall SetUserObjectInformationA(long long ptr long)
 @ stdcall SetUserObjectInformationW(long long ptr long) NtUserSetObjectInformation
diff --git a/dlls/user32/win.c b/dlls/user32/win.c
index 6459ddf9f28..b8c04047333 100644
--- a/dlls/user32/win.c
+++ b/dlls/user32/win.c
@@ -616,6 +616,16 @@ DPI_AWARENESS_CONTEXT WINAPI GetWindowDpiAwarenessContext( HWND hwnd )
 }

+/***********************************************************************
+ *		GetWindowDpiHostingBehavior  (USER32.@)
+ */
+DPI_HOSTING_BEHAVIOR WINAPI GetWindowDpiHostingBehavior( HWND hwnd )
+{
+    FIXME("(%p): stub\n", hwnd);
+    return DPI_HOSTING_BEHAVIOR_DEFAULT;
+}
+
+
 static LONG_PTR get_window_long_ptr( HWND hwnd, int offset, LONG_PTR ret, BOOL ansi )
 {
     if (offset == DWLP_DLGPROC && NtUserGetDialogInfo( hwnd ))
diff --git a/include/windef.h b/include/windef.h
index b22e15c4dbf..78e4f56052c 100644
--- a/include/windef.h
+++ b/include/windef.h
@@ -439,4 +439,10 @@ typedef enum DPI_AWARENESS
 }
 #endif

+typedef enum {
+  DPI_HOSTING_BEHAVIOR_INVALID = -1,
+  DPI_HOSTING_BEHAVIOR_DEFAULT = 0,
+  DPI_HOSTING_BEHAVIOR_MIXED = 1
+} DPI_HOSTING_BEHAVIOR;
+
 #endif /* _WINDEF_ */
diff --git a/include/winuser.h b/include/winuser.h
index 73e7919aaea..ee0f05e1cb8 100644
--- a/include/winuser.h
+++ b/include/winuser.h
@@ -4296,6 +4296,7 @@ WINUSERAPI DWORD       WINAPI GetWindowContextHelpId(HWND);
 WINUSERAPI HDC         WINAPI GetWindowDC(HWND);
 WINUSERAPI BOOL        WINAPI GetWindowDisplayAffinity(HWND,DWORD*);
 WINUSERAPI DPI_AWARENESS_CONTEXT WINAPI GetWindowDpiAwarenessContext(HWND);
+WINUSERAPI DPI_HOSTING_BEHAVIOR WINAPI GetWindowDpiHostingBehavior(HWND);
 WINUSERAPI BOOL        WINAPI GetWindowFeedbackSetting(HWND,FEEDBACK_TYPE,DWORD,UINT32*,void*);
 WINUSERAPI BOOL        WINAPI GetWindowInfo(HWND, PWINDOWINFO);
 WINUSERAPI LONG        WINAPI GetWindowLongA(HWND,INT);
@@ -4608,6 +4609,7 @@ WINUSERAPI BOOL        WINAPI SetSystemMenu(HWND,HMENU);
 WINUSERAPI UINT_PTR    WINAPI SetSystemTimer(HWND,UINT_PTR,UINT,void*);
 WINUSERAPI BOOL        WINAPI SetThreadDesktop(HDESK);
 WINUSERAPI DPI_AWARENESS_CONTEXT WINAPI SetThreadDpiAwarenessContext(DPI_AWARENESS_CONTEXT);
+WINUSERAPI DPI_HOSTING_BEHAVIOR WINAPI SetThreadDpiHostingBehavior(DPI_HOSTING_BEHAVIOR);
 WINUSERAPI UINT_PTR    WINAPI SetTimer(HWND,UINT_PTR,UINT,TIMERPROC);
 WINUSERAPI BOOL        WINAPI SetUserObjectInformationA(HANDLE,INT,LPVOID,DWORD);
 WINUSERAPI BOOL        WINAPI SetUserObjectInformationW(HANDLE,INT,LPVOID,DWORD);

[Fabian Maurer (＠DarkShadow44)]

I already created a MR for that a while ago: https://gitlab.winehq.org/wine/wine/-/merge_requests/4294

[Fabian Maurer (＠DarkShadow44)]

Fabian Maurer (@DarkShadow44) commented about dlls/user32/user32.spec:
> @ stdcall SetTaskmanWindow (long)
>  @ stdcall SetThreadDesktop(long) NtUserSetThreadDesktop
>  @ stdcall SetThreadDpiAwarenessContext(ptr)
> +@ stdcall SetThreadDpiHostingBehavior(ptr)

Pretty sure this should be `long`

[Paweł Ulita (＠pawelulita)]

On Sun Nov 12 20:47:31 2023 +0000, Fabian Maurer wrote:
> Pretty sure this should be `long`

You're right. It should be `long` here and `ptr` for `GetWindowDpiHostingBehavior()`.