3 files changed, 6 insertions, 6 deletions
diff --git a/src/Fl_Gl_Window.cxx b/src/Fl_Gl_Window.cxx
index 7e4693acd..72468fd5c 100644
--- a/src/Fl_Gl_Window.cxx
+++ b/src/Fl_Gl_Window.cxx
@@ -404,7 +404,7 @@ int Fl_Gl_Window::gl_plugin_linkage() {
  Fl::event_y() to the pixel units used by the OpenGL source code.
  \version 1.3.4
  */
-int Fl_Gl_Window::pixels_per_unit() {
+float Fl_Gl_Window::pixels_per_unit() {
   return pGlWindowDriver->pixels_per_unit();
 }
 
@@ -470,7 +470,7 @@ void Fl_Cocoa_Gl_Window_Driver::after_show(int need_redraw) {
   if(need_redraw) pWindow->redraw();//necessary only after creation of a top-level GL window
 }
 
-int Fl_Cocoa_Gl_Window_Driver::pixels_per_unit()
+float Fl_Cocoa_Gl_Window_Driver::pixels_per_unit()
 {
   return (fl_mac_os_version >= 100700 && Fl::use_high_res_GL() && Fl_X::i(pWindow) &&
           Fl_Cocoa_Window_Driver::driver(pWindow)->mapped_to_retina()) ? 2 : 1;
diff --git a/src/drivers/OpenGL/Fl_OpenGL_Display_Device.cxx b/src/drivers/OpenGL/Fl_OpenGL_Display_Device.cxx
index 72fdcd64e..8b216d1ce 100644
--- a/src/drivers/OpenGL/Fl_OpenGL_Display_Device.cxx
+++ b/src/drivers/OpenGL/Fl_OpenGL_Display_Device.cxx
@@ -63,7 +63,7 @@ static uchar *convert_BGRA_to_RGB(uchar *baseAddress, int w, int h, int mByteWid
 
 Fl_RGB_Image* Fl_OpenGL_Display_Device::capture_gl_rectangle(Fl_Gl_Window* glw, int x, int y, int w, int h)
 {
-  int factor = glw->pixels_per_unit();
+  float factor = glw->pixels_per_unit();
   if (factor > 1) {
     w *= factor; h *= factor; x *= factor; y *= factor;
   }
diff --git a/src/glut_compatability.cxx b/src/glut_compatability.cxx
index 6a024d321..13e06242a 100644
--- a/src/glut_compatability.cxx
+++ b/src/glut_compatability.cxx
@@ -74,9 +74,9 @@ int Fl_Glut_Window::handle(int event) {
   make_current();
   int ex = Fl::event_x();
   int ey = Fl::event_y();
-  int factor = pixels_per_unit();
-  ex *= factor;
-  ey *= factor;
+  float factor = pixels_per_unit();
+  ex = int(ex * factor + 0.5f);
+  ey = int(ey * factor + 0.5f);
   int button;
   switch (event) {