win32u: Implement NtUserGetProcessDpiAwarenessContext and NtUserSetProcessDpiAwarenessContext.

And use them in user32.

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/user32/sysparams.c

@@ -120,8 +120,6 @@ static BOOL notify_change = TRUE;
 /* System parameters storage */
 static RECT work_area;
 static UINT system_dpi;
-static DPI_AWARENESS dpi_awareness;
-static DPI_AWARENESS default_awareness = DPI_AWARENESS_UNAWARE;
 
 static HKEY volatile_base_key;
 
@@ -1374,11 +1372,7 @@ void SYSPARAMS_Init(void)
 
     /* FIXME: what do the DpiScalingVer flags mean? */
     get_dword_entry( (union sysparam_all_entry *)&entry_DPISCALINGVER, 0, &dpi_scaling, 0 );
-    if (!dpi_scaling)
+    if (!dpi_scaling) NtUserSetProcessDpiAwarenessContext( NTUSER_DPI_PER_MONITOR_AWARE, 0 );
-    {
-        default_awareness = DPI_AWARENESS_PER_MONITOR_AWARE;
-        dpi_awareness = 0x10 | default_awareness;
-    }
 
     if (volatile_base_key && dispos == REG_CREATED_NEW_KEY)  /* first process, initialize entries */
     {
@@ -3214,19 +3208,31 @@ RECT rect_thread_to_win_dpi( HWND hwnd, RECT rect )
  */
 BOOL WINAPI SetProcessDpiAwarenessContext( DPI_AWARENESS_CONTEXT context )
 {
-    DPI_AWARENESS val = GetAwarenessFromDpiAwarenessContext( context );
+    ULONG awareness;
 
-    if (val == DPI_AWARENESS_INVALID)
+    switch (GetAwarenessFromDpiAwarenessContext( context ))
     {
+    case DPI_AWARENESS_UNAWARE:
+        awareness = NTUSER_DPI_UNAWARE;
+        break;
+    case DPI_AWARENESS_SYSTEM_AWARE:
+        awareness = NTUSER_DPI_SYSTEM_AWARE;
+        break;
+    case DPI_AWARENESS_PER_MONITOR_AWARE:
+        awareness = context == DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2
+            ? NTUSER_DPI_PER_MONITOR_AWARE_V2 : NTUSER_DPI_PER_MONITOR_AWARE;
+        break;
+    default:
         SetLastError( ERROR_INVALID_PARAMETER );
         return FALSE;
     }
-    val |= 0x10;  /* avoid 0 value */
+
-    if (InterlockedCompareExchange( &dpi_awareness, val, 0 ))
+    if (!NtUserSetProcessDpiAwarenessContext( awareness, 0 ))
     {
         SetLastError( ERROR_ACCESS_DENIED );
         return FALSE;
     }
+
     TRACE( "set to %p\n", context );
     return TRUE;
 }
@@ -3236,12 +3242,7 @@ BOOL WINAPI SetProcessDpiAwarenessContext( DPI_AWARENESS_CONTEXT context )
  */
 BOOL WINAPI GetProcessDpiAwarenessInternal( HANDLE process, DPI_AWARENESS *awareness )
 {
-    if (process && process != GetCurrentProcess())
+    *awareness = NtUserGetProcessDpiAwarenessContext( process ) & 3;
-    {
-        WARN( "not supported on other process %p\n", process );
-        *awareness = DPI_AWARENESS_UNAWARE;
-    }
-    else *awareness = dpi_awareness & 3;
     return TRUE;
 }
 
@@ -3309,7 +3310,7 @@ BOOL WINAPI IsValidDpiAwarenessContext( DPI_AWARENESS_CONTEXT context )
 BOOL WINAPI SetProcessDPIAware(void)
 {
     TRACE("\n");
-    InterlockedCompareExchange( &dpi_awareness, 0x11, 0 );
+    NtUserSetProcessDpiAwarenessContext( NTUSER_DPI_SYSTEM_AWARE, 0 );
     return TRUE;
 }
 
@@ -3372,8 +3373,7 @@ DPI_AWARENESS_CONTEXT WINAPI GetThreadDpiAwarenessContext(void)
     struct user_thread_info *info = get_user_thread_info();
 
     if (info->dpi_awareness) return ULongToHandle( info->dpi_awareness );
-    if (dpi_awareness) return ULongToHandle( dpi_awareness );
+    return UlongToHandle( (NtUserGetProcessDpiAwarenessContext( GetCurrentProcess() ) & 3 ) | 0x10 );
-    return ULongToHandle( 0x10 | default_awareness );
 }
 
 /**********************************************************************
@@ -3391,9 +3391,8 @@ DPI_AWARENESS_CONTEXT WINAPI SetThreadDpiAwarenessContext( DPI_AWARENESS_CONTEXT
     }
     if (!(prev = info->dpi_awareness))
     {
-        prev = dpi_awareness;
+        prev = NtUserGetProcessDpiAwarenessContext( GetCurrentProcess() ) & 3;
-        if (!prev) prev = 0x10 | DPI_AWARENESS_UNAWARE;
+        prev |= 0x80000010;  /* restore to process default */
-        prev |= 0x80000000;  /* restore to process default */
     }
     if (((ULONG_PTR)context & ~(ULONG_PTR)0x13) == 0x80000000) info->dpi_awareness = 0;
     else info->dpi_awareness = val | 0x10;

dlls/win32u/syscall.c

@@ -120,6 +120,7 @@ static void * const syscalls[] =
     NtUserGetMouseMovePointsEx,
     NtUserGetObjectInformation,
     NtUserGetOpenClipboardWindow,
+    NtUserGetProcessDpiAwarenessContext,
     NtUserGetProcessWindowStation,
     NtUserGetProp,
     NtUserGetThreadDesktop,
@@ -130,6 +131,7 @@ static void * const syscalls[] =
     NtUserRemoveProp,
     NtUserSetKeyboardState,
     NtUserSetObjectInformation,
+    NtUserSetProcessDpiAwarenessContext,
     NtUserSetProcessWindowStation,
     NtUserSetProp,
     NtUserSetThreadDesktop,

dlls/win32u/sysparams.c

@@ -1657,6 +1657,44 @@ void sysparams_init(void)
     }
 }
 
+static DPI_AWARENESS dpi_awareness;
+
+/***********************************************************************
+ *	     NtUserSetProcessDpiAwarenessContext    (win32u.@)
+ */
+BOOL WINAPI NtUserSetProcessDpiAwarenessContext( ULONG awareness, ULONG unknown )
+{
+    switch (awareness)
+    {
+    case NTUSER_DPI_UNAWARE:
+    case NTUSER_DPI_SYSTEM_AWARE:
+    case NTUSER_DPI_PER_MONITOR_AWARE:
+    case NTUSER_DPI_PER_MONITOR_AWARE_V2:
+    case NTUSER_DPI_PER_UNAWARE_GDISCALED:
+        break;
+    default:
+        SetLastError( ERROR_INVALID_PARAMETER );
+        return FALSE;
+    }
+
+    return !InterlockedCompareExchange( &dpi_awareness, awareness, 0 );
+}
+
+/***********************************************************************
+ *	     NtUserGetProcessDpiAwarenessContext    (win32u.@)
+ */
+ULONG WINAPI NtUserGetProcessDpiAwarenessContext( HANDLE process )
+{
+    if (process && process != GetCurrentProcess())
+    {
+        WARN( "not supported on other process %p\n", process );
+        return NTUSER_DPI_UNAWARE;
+    }
+
+    if (!dpi_awareness) return NTUSER_DPI_UNAWARE;
+    return dpi_awareness;
+}
+
 /***********************************************************************
  *	     NtUserCallOneParam    (win32u.@)
  */

dlls/win32u/win32u.spec

@@ -977,7 +977,7 @@
 @ stub NtUserGetPointerType
 @ stub NtUserGetPrecisionTouchPadConfiguration
 @ stdcall NtUserGetPriorityClipboardFormat(ptr long)
-@ stub NtUserGetProcessDpiAwarenessContext
+@ stdcall -syscall NtUserGetProcessDpiAwarenessContext(long)
 @ stub NtUserGetProcessUIContextInformation
 @ stdcall -syscall NtUserGetProcessWindowStation()
 @ stdcall -syscall NtUserGetProp(long wstr)
@@ -1216,7 +1216,7 @@
 @ stdcall -syscall NtUserSetObjectInformation(long long ptr long)
 @ stub NtUserSetParent
 @ stub NtUserSetPrecisionTouchPadConfiguration
-@ stub NtUserSetProcessDpiAwarenessContext
+@ stdcall -syscall NtUserSetProcessDpiAwarenessContext(long long)
 @ stub NtUserSetProcessInteractionFlags
 @ stub NtUserSetProcessMousewheelRoutingMode
 @ stub NtUserSetProcessRestrictionExemption

dlls/wow64win/syscall.h

@@ -107,6 +107,7 @@
     SYSCALL_ENTRY( NtUserGetMouseMovePointsEx ) \
     SYSCALL_ENTRY( NtUserGetObjectInformation ) \
     SYSCALL_ENTRY( NtUserGetOpenClipboardWindow ) \
+    SYSCALL_ENTRY( NtUserGetProcessDpiAwarenessContext ) \
     SYSCALL_ENTRY( NtUserGetProcessWindowStation ) \
     SYSCALL_ENTRY( NtUserGetProp ) \
     SYSCALL_ENTRY( NtUserGetThreadDesktop ) \
@@ -117,6 +118,7 @@
     SYSCALL_ENTRY( NtUserRemoveProp ) \
     SYSCALL_ENTRY( NtUserSetKeyboardState ) \
     SYSCALL_ENTRY( NtUserSetObjectInformation ) \
+    SYSCALL_ENTRY( NtUserSetProcessDpiAwarenessContext ) \
     SYSCALL_ENTRY( NtUserSetProcessWindowStation ) \
     SYSCALL_ENTRY( NtUserSetProp ) \
     SYSCALL_ENTRY( NtUserSetThreadDesktop )

dlls/wow64win/user.c

@@ -293,3 +293,18 @@ NTSTATUS WINAPI wow64_NtUserGetMouseMovePointsEx( UINT *args )
 
     return NtUserGetMouseMovePointsEx( size, ptin, ptout, count, resolution );
 }
+
+NTSTATUS WINAPI wow64_NtUserSetProcessDpiAwarenessContext( UINT *args )
+{
+    ULONG awareness = get_ulong( &args );
+    ULONG unknown = get_ulong( &args );
+
+    return NtUserSetProcessDpiAwarenessContext( awareness, unknown );
+}
+
+NTSTATUS WINAPI wow64_NtUserGetProcessDpiAwarenessContext( UINT *args )
+{
+    HANDLE process = get_handle( &args );
+
+    return NtUserGetProcessDpiAwarenessContext( process );
+}

include/ntuser.h

@@ -39,6 +39,13 @@ struct enum_display_monitor_params
     LPARAM lparam;
 };
 
+/* process DPI awareness contexts */
+#define NTUSER_DPI_UNAWARE                0x00006010
+#define NTUSER_DPI_SYSTEM_AWARE           0x00006011
+#define NTUSER_DPI_PER_MONITOR_AWARE      0x00000012
+#define NTUSER_DPI_PER_MONITOR_AWARE_V2   0x00000022
+#define NTUSER_DPI_PER_UNAWARE_GDISCALED  0x40006010
+
 /* NtUserCallOneParam codes, not compatible with Windows */
 enum
 {
@@ -123,6 +130,7 @@ HWND    WINAPI NtUserGetOpenClipboardWindow(void);
 INT     WINAPI NtUserGetPriorityClipboardFormat( UINT *list, INT count );
 HWINSTA WINAPI NtUserGetProcessWindowStation(void);
 HANDLE  WINAPI NtUserGetProp( HWND hwnd, const WCHAR *str );
+ULONG   WINAPI NtUserGetProcessDpiAwarenessContext( HANDLE process );
 HDESK   WINAPI NtUserGetThreadDesktop( DWORD thread );
 BOOL    WINAPI NtUserGetUpdatedClipboardFormats( UINT *formats, UINT size, UINT *out_size );
 BOOL    WINAPI NtUserIsClipboardFormatAvailable( UINT format );
@@ -137,6 +145,7 @@ BOOL    WINAPI NtUserScrollDC( HDC hdc, INT dx, INT dy, const RECT *scroll, cons
                                HRGN ret_update_rgn, RECT *update_rect );
 HPALETTE WINAPI NtUserSelectPalette( HDC hdc, HPALETTE palette, WORD force_background );
 BOOL    WINAPI NtUserSetKeyboardState( BYTE *state );
+BOOL    WINAPI NtUserSetProcessDpiAwarenessContext( ULONG awareness, ULONG unknown );
 BOOL    WINAPI NtUserSetProcessWindowStation( HWINSTA handle );
 BOOL    WINAPI NtUserSetProp( HWND hwnd, const WCHAR *str, HANDLE handle );
 BOOL    WINAPI NtUserSetThreadDesktop( HDESK handle );