user32: Implement SetProcessDpiAwarenessContext().

dlls/user32/sysparams.c

@@ -2942,6 +2942,28 @@ BOOL WINAPI EnumDisplaySettingsExW(LPCWSTR lpszDeviceName, DWORD iModeNum,
     return USER_Driver->pEnumDisplaySettingsEx(lpszDeviceName, iModeNum, lpDevMode, dwFlags);
 }
 
+
+static DPI_AWARENESS_CONTEXT dpi_awareness;
+
+/**********************************************************************
+ *              SetProcessDpiAwarenessContext   (USER32.@)
+ */
+BOOL WINAPI SetProcessDpiAwarenessContext( DPI_AWARENESS_CONTEXT context )
+{
+    if (!IsValidDpiAwarenessContext( context ))
+    {
+        SetLastError( ERROR_INVALID_PARAMETER );
+        return FALSE;
+    }
+    if (InterlockedCompareExchangePointer( (void **)&dpi_awareness, context, NULL ))
+    {
+        SetLastError( ERROR_ACCESS_DENIED );
+        return FALSE;
+    }
+    TRACE( "set to %p\n", context );
+    return TRUE;
+}
+
 /***********************************************************************
  *              AreDpiAwarenessContextsEqual   (USER32.@)
  */
@@ -2980,6 +3002,7 @@ BOOL WINAPI IsValidDpiAwarenessContext( DPI_AWARENESS_CONTEXT context )
 BOOL WINAPI SetProcessDPIAware(void)
 {
     TRACE("\n");
+    InterlockedCompareExchangePointer( (void **)&dpi_awareness, DPI_AWARENESS_CONTEXT_SYSTEM_AWARE, NULL );
     return TRUE;
 }
 
@@ -2988,8 +3011,8 @@ BOOL WINAPI SetProcessDPIAware(void)
  */
 BOOL WINAPI IsProcessDPIAware(void)
 {
-    TRACE("returning TRUE\n");
-    return TRUE;
+    /* FIXME: should default to FALSE when not set */
+    return dpi_awareness != DPI_AWARENESS_CONTEXT_UNAWARE;
 }
 
 /***********************************************************************

dlls/user32/tests/sysparams.c

@@ -41,6 +41,7 @@
 static LONG (WINAPI *pChangeDisplaySettingsExA)(LPCSTR, LPDEVMODEA, HWND, DWORD, LPVOID);
 static BOOL (WINAPI *pIsProcessDPIAware)(void);
 static BOOL (WINAPI *pSetProcessDPIAware)(void);
+static BOOL (WINAPI *pSetProcessDpiAwarenessContext)(DPI_AWARENESS_CONTEXT);
 
 static BOOL strict;
 static int dpi, real_dpi;
@@ -2995,6 +2996,30 @@ static void test_dpi_aware(void)
         return;
     }
 
+    if (pSetProcessDpiAwarenessContext)
+    {
+        SetLastError( 0xdeadbeef );
+        ret = pSetProcessDpiAwarenessContext( NULL );
+        ok( !ret, "got %d\n", ret );
+        ok( GetLastError() == ERROR_INVALID_PARAMETER, "wrong error %u\n", GetLastError() );
+        SetLastError( 0xdeadbeef );
+        ret = pSetProcessDpiAwarenessContext( (DPI_AWARENESS_CONTEXT)-5 );
+        ok( !ret, "got %d\n", ret );
+        ok( GetLastError() == ERROR_INVALID_PARAMETER, "wrong error %u\n", GetLastError() );
+        ret = pSetProcessDpiAwarenessContext( DPI_AWARENESS_CONTEXT_SYSTEM_AWARE );
+        ok( ret, "got %d\n", ret );
+        SetLastError( 0xdeadbeef );
+        ret = pSetProcessDpiAwarenessContext( DPI_AWARENESS_CONTEXT_SYSTEM_AWARE );
+        ok( !ret, "got %d\n", ret );
+        ok( GetLastError() == ERROR_ACCESS_DENIED, "wrong error %u\n", GetLastError() );
+        SetLastError( 0xdeadbeef );
+        ret = pSetProcessDpiAwarenessContext( DPI_AWARENESS_CONTEXT_UNAWARE );
+        ok( !ret, "got %d\n", ret );
+        ok( GetLastError() == ERROR_ACCESS_DENIED, "wrong error %u\n", GetLastError() );
+        ret = pIsProcessDPIAware();
+        ok(ret, "got %d\n", ret);
+    }
+
     ret = pSetProcessDPIAware();
     ok(ret, "got %d\n", ret);
 
@@ -3019,6 +3044,7 @@ START_TEST(sysparams)
     pChangeDisplaySettingsExA = (void*)GetProcAddress(hdll, "ChangeDisplaySettingsExA");
     pIsProcessDPIAware = (void*)GetProcAddress(hdll, "IsProcessDPIAware");
     pSetProcessDPIAware = (void*)GetProcAddress(hdll, "SetProcessDPIAware");
+    pSetProcessDpiAwarenessContext = (void*)GetProcAddress(hdll, "SetProcessDpiAwarenessContext");
 
     hInstance = GetModuleHandleA( NULL );
     hdc = GetDC(0);

dlls/user32/user32.spec

@@ -671,8 +671,9 @@
 @ stdcall SetMessageQueue(long)
 @ stdcall SetParent(long long)
 @ stdcall SetPhysicalCursorPos(long long)
-@ stdcall SetProcessDefaultLayout(long)
 @ stdcall SetProcessDPIAware()
+@ stdcall SetProcessDefaultLayout(long)
+@ stdcall SetProcessDpiAwarenessContext(long)
 @ stdcall SetProcessWindowStation(long)
 @ stdcall SetProgmanWindow (long)
 @ stdcall SetPropA(long str long)

include/winuser.h

@@ -4064,6 +4064,7 @@ WINUSERAPI HWND        WINAPI SetParent(HWND,HWND);
 WINUSERAPI BOOL        WINAPI SetPhysicalCursorPos(INT,INT);
 WINUSERAPI BOOL        WINAPI SetProcessDPIAware(void);
 WINUSERAPI BOOL        WINAPI SetProcessDefaultLayout(DWORD);
+WINUSERAPI BOOL        WINAPI SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT);
 WINUSERAPI BOOL        WINAPI SetProcessWindowStation(HWINSTA);
 WINUSERAPI BOOL        WINAPI SetPropA(HWND,LPCSTR,HANDLE);
 WINUSERAPI BOOL        WINAPI SetPropW(HWND,LPCWSTR,HANDLE);