Apply DPI Scaling to GUIModalMenu (minetest#12693)

Co-authored-by: sfan5 <[email protected]>

src/gui/modalMenu.cpp

@@ -19,14 +19,14 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 */
 
 #include <cstdlib>
+#include "client/renderingengine.h"
 #include "modalMenu.h"
 #include "gettext.h"
 #include "porting.h"
 #include "settings.h"
 
 #ifdef HAVE_TOUCHSCREENGUI
 #include "touchscreengui.h"
-#include "client/renderingengine.h"
 #endif
 
 // clang-format off
@@ -41,10 +41,13 @@ GUIModalMenu::GUIModalMenu(gui::IGUIEnvironment* env, gui::IGUIElement* parent,
  m_remap_dbl_click(remap_dbl_click)
 {
  m_gui_scale = std::max(g_settings->getFloat("gui_scaling"), 0.5f);
+ const float screen_dpi_scale = RenderingEngine::getDisplayDensity();
 #ifdef HAVE_TOUCHSCREENGUI
- float d = RenderingEngine::getDisplayDensity();
- m_gui_scale *= 1.1 - 0.3 * d + 0.2 * d * d;
+ m_gui_scale *= 1.1f - 0.3f * screen_dpi_scale + 0.2f * screen_dpi_scale * screen_dpi_scale;
+#else
+ m_gui_scale *= screen_dpi_scale;
 #endif
+
  setVisible(true);
  Environment->setFocus(this);
  m_menumgr->createdMenu(this);