3 files changed, 8 insertions, 10 deletions
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H
index 682afca25..628fc9511 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H
+++ b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.H
@@ -61,7 +61,6 @@ public:
   virtual void screen_xywh(int &X, int &Y, int &W, int &H, int n);
   virtual void screen_dpi(float &h, float &v, int n=0);
   int screen_num_unscaled(int x, int y);
-  float DWM_scaling_factor(int screen_num);
   virtual void screen_work_area(int &X, int &Y, int &W, int &H, int n);
   // --- audible output
   virtual void beep(int type);
@@ -92,14 +91,14 @@ public:
   virtual APP_SCALING_CAPABILITY rescalable() {
     return PER_SCREEN_APP_SCALING;
   }
-#endif
-#if defined(FLTK_HIDPI_SUPPORT)
   virtual float scale(int n) {
     return scale_of_screen[n];
   }
   virtual void scale(int n, float f) {
     scale_of_screen[n] = f;
   }
+#else
+  float DWM_scaling_factor();
 #endif
   virtual float desktop_scale_factor();
 };
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
index 5951ba193..0f0609bcc 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
+++ b/src/drivers/WinAPI/Fl_WinAPI_Screen_Driver.cxx
@@ -630,12 +630,10 @@ Fl_RGB_Image *Fl_WinAPI_Screen_Driver::read_win_rectangle_unscaled(uchar *p, int
   return rgb;
 }
 
+#ifndef FLTK_HIDPI_SUPPORT
 /* Returns the current desktop scaling factor for screen_num (1.75 for example)
  */
-float Fl_WinAPI_Screen_Driver::DWM_scaling_factor(int screen_num) {
-#ifdef FLTK_HIDPI_SUPPORT
-  return scale(screen_num);
-#else
+float Fl_WinAPI_Screen_Driver::DWM_scaling_factor() {
   // Compute the global desktop scaling factor: 1, 1.25, 1.5, 1.75, etc...
   // This factor can be set in Windows 10 by
   // "Change the size of text, apps and other items" in display settings.
@@ -655,9 +653,10 @@ float Fl_WinAPI_Screen_Driver::DWM_scaling_factor(int screen_num) {
   float scaling = dhr/float(hr);
   scaling = int(scaling * 100 + 0.5)/100.; // round to 2 digits after decimal point
   return scaling;
-#endif // FLTK_HIDPI_SUPPORT
 }
 
+#endif // ! FLTK_HIDPI_SUPPORT
+
 void Fl_WinAPI_Screen_Driver::offscreen_size(Fl_Offscreen off, int &width, int &height)
 {
   BITMAP bitmap;
diff --git a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
index 20a84736a..383e85e4a 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
+++ b/src/drivers/WinAPI/Fl_WinAPI_Window_Driver.cxx
@@ -108,7 +108,7 @@ RECT // frame of the decorated window in screen coordinates
     width = rc.right;
     height = rc.bottom;
 #else
-    float scaling = ((Fl_WinAPI_Screen_Driver*)Fl::screen_driver())->DWM_scaling_factor(0);
+    float scaling = ((Fl_WinAPI_Screen_Driver*)Fl::screen_driver())->DWM_scaling_factor();
     width = int(win->w() * scaling);
     height = int(win->h() * scaling);
 #endif
@@ -141,7 +141,7 @@ int Fl_WinAPI_Window_Driver::decorated_h()
   int mini_by = by/s; if (mini_by < 1) mini_by = 1;
   return h() + (bt + by)/s + mini_by;
 #else
-  float scaling = ((Fl_WinAPI_Screen_Driver*)Fl::screen_driver())->DWM_scaling_factor(0);
+  float scaling = ((Fl_WinAPI_Screen_Driver*)Fl::screen_driver())->DWM_scaling_factor();
   return h() + bt/scaling + 2 * by +1;
 #endif
 }