Try to correct function pointer prototype

OpenSmalltalk · Apr 28, 2017 · 65bbdf3 · 65bbdf3
1 parent aa47a62
commit 65bbdf3
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/platforms/win32/vm/sqWin32Window.c b/platforms/win32/vm/sqWin32Window.c
@@ -1770,7 +1770,15 @@ typedef double (*getDpi_t)(void);
 /*
  * Lazy-loaded GetDpiForMonitor, which is not on Windows7 and Windows8
  */
-typedef HRESULT (*thisGetDpiForMonitor_t)(HMONITOR,UINT,UINT *,UINT *);
+// enum duplicated from ShellScalingApi.
+typedef enum this_MONITOR_DPI_TYPE { 
+  thisMDT_EFFECTIVE_DPI  = 0,
+  thisMDT_ANGULAR_DPI    = 1,
+  thisMDT_RAW_DPI        = 2,
+  thisMDT_DEFAULT        = MDT_EFFECTIVE_DPI
+} thisMONITOR_DPI_TYPE;
+
+typedef HRESULT (*thisGetDpiForMonitor_t)(HMONITOR,thisMONITOR_DPI_TYPE,UINT *,UINT *);
 static thisGetDpiForMonitor_t thisGetDpiForMonitor = NULL;
 
 /*
@@ -1790,7 +1798,7 @@ static double getDpiMonitor(void)
   if (!thisGetDpiForMonitor) { return 0.0; }
 
   if ((hMonitor = MonitorFromWindow(stWindow, MONITOR_DEFAULTTONULL))) {
-    if (thisGetDpiForMonitor(hMonitor, 0, &hdpi, &vdpi) == S_OK && hdpi > 0 && vdpi > 0) {
+    if (thisGetDpiForMonitor(hMonitor, thisMDT_EFFECTIVE_DPI, &hdpi, &vdpi) == S_OK && hdpi > 0 && vdpi > 0) {
       return (double) vdpi;
     }
   }