user32: Set the process DPI awareness from the manifest.

dlls/user32/user_main.c

@@ -212,6 +212,62 @@ static const WCHAR *get_default_desktop(void)
 
 
 /***********************************************************************
+ *           dpiaware_init
+ *
+ * Initialize the DPI awareness style.
+ */
+static void dpiaware_init(void)
+{
+    WCHAR buffer[256];
+    static const WCHAR dpiAwareW[] = {'d','p','i','A','w','a','r','e',0};
+    static const WCHAR dpiAwarenessW[] = {'d','p','i','A','w','a','r','e','n','e','s','s',0};
+    static const WCHAR namespace2005W[] = {'h','t','t','p',':','/','/','s','c','h','e','m','a','s','.','m','i','c','r','o','s','o','f','t','.','c','o','m','/','S','M','I','/','2','0','0','5','/','W','i','n','d','o','w','s','S','e','t','t','i','n','g','s',0};
+    static const WCHAR namespace2016W[] = {'h','t','t','p',':','/','/','s','c','h','e','m','a','s','.','m','i','c','r','o','s','o','f','t','.','c','o','m','/','S','M','I','/','2','0','1','6','/','W','i','n','d','o','w','s','S','e','t','t','i','n','g','s',0};
+
+    if (QueryActCtxSettingsW( 0, NULL, namespace2016W, dpiAwarenessW, buffer, ARRAY_SIZE(buffer), NULL ))
+    {
+        static const WCHAR unawareW[] = {'u','n','a','w','a','r','e',0};
+        static const WCHAR systemW[] = {'s','y','s','t','e','m',0};
+        static const WCHAR permonW[] = {'p','e','r','m','o','n','i','t','o','r',0};
+        static const WCHAR permonv2W[] = {'p','e','r','m','o','n','i','t','o','r','v','2',0};
+        static const WCHAR spacesW[] = {' ','\t','\r','\n',0};
+        static const WCHAR * const types[] = { unawareW, systemW, permonW, permonv2W };
+        WCHAR *p, *start = buffer, *end;
+        ULONG_PTR i;
+
+        TRACE( "got dpiAwareness=%s\n", debugstr_w(buffer) );
+        for (start = buffer; *start; start = end)
+        {
+            start += strspnW( start, spacesW );
+            if (!(end = strchrW( start, ',' ))) end = start + strlenW(start);
+            else *end++ = 0;
+            if ((p = strpbrkW( start, spacesW ))) *p = 0;
+            for (i = 0; i < ARRAY_SIZE(types); i++)
+            {
+                if (strcmpiW( start, types[i] )) continue;
+                SetProcessDpiAwarenessContext( (DPI_AWARENESS_CONTEXT)~i );
+                return;
+            }
+        }
+    }
+    else if (QueryActCtxSettingsW( 0, NULL, namespace2005W, dpiAwareW, buffer, ARRAY_SIZE(buffer), NULL ))
+    {
+        static const WCHAR trueW[] = {'t','r','u','e',0};
+        static const WCHAR truepmW[] = {'t','r','u','e','/','p','m',0};
+        static const WCHAR permonW[] = {'p','e','r',' ','m','o','n','i','t','o','r',0};
+
+        TRACE( "got dpiAware=%s\n", debugstr_w(buffer) );
+        if (!strcmpiW( buffer, trueW ))
+            SetProcessDpiAwarenessContext( DPI_AWARENESS_CONTEXT_SYSTEM_AWARE );
+        else if (!strcmpiW( buffer, truepmW ) || !strcmpiW( buffer, permonW ))
+            SetProcessDpiAwarenessContext( DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE );
+        else
+            SetProcessDpiAwarenessContext( DPI_AWARENESS_CONTEXT_UNAWARE );
+    }
+}
+
+
+/***********************************************************************
  *           winstation_init
  *
  * Connect to the process window station and desktop.
@@ -272,6 +328,7 @@ static void winstation_init(void)
  */
 static BOOL process_attach(void)
 {
+    dpiaware_init();
     winstation_init();
 
     /* Initialize system colors and metrics */

dlls/user32/user_private.h

@@ -32,6 +32,8 @@
 #define GET_WORD(ptr)  (*(const WORD *)(ptr))
 #define GET_DWORD(ptr) (*(const DWORD *)(ptr))
 
+#define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
+
 #define WM_SYSTIMER	    0x0118
 #define WM_POPUPSYSTEMMENU  0x0313