fix: Building on macOS

lib/libimhex/include/hex/helpers/utils_macos.hpp

@@ -2,9 +2,12 @@
 
 #if defined(OS_MACOS)
 
-    #include <string>
+    extern "C" {
 
-    extern "C" void openWebpageMacos(const char *url);
-    extern "C" bool isMacosSystemDarkModeEnabled();
+        void openWebpageMacos(const char *url);
+        bool isMacosSystemDarkModeEnabled();
+        float getBackingScaleFactorMacos();
+
+    }
 
 #endif

lib/libimhex/source/helpers/utils_macos.m

@@ -4,6 +4,7 @@
     #include <ApplicationServices/ApplicationServices.h>
     #include <Foundation/NSUserDefaults.h>
     #include <Foundation/Foundation.h>
+    #include <AppKit/NSScreen.h>
 
     #include <string.h>
     #include <stdlib.h>
@@ -25,4 +26,8 @@
         }
     }
 
+    float getBackingScaleFactorMacos(void) {
+        return [[NSScreen mainScreen] backingScaleFactor];
+    }
+
 #endif

main/source/init/splash_window.cpp

@@ -22,10 +22,6 @@
 #include <future>
 #include <numeric>
 
-#if defined (OS_MACOS)
-    #include <AppKit/NSScreen.h>
-#endif
-
 using namespace std::literals::chrono_literals;
 
 namespace hex::init {
@@ -209,7 +205,7 @@ namespace hex::init {
                 meanScale = 1.0F;
 
             #if defined(OS_MACOS)
-                meanScale /= NSScreen.mainScreen.backingScaleFactor;
+                meanScale /= getBackingScaleFactorMacos();
             #endif
 
             ImHexApi::System::impl::setGlobalScale(meanScale);