comparison system/System.cpp @ 1818:c5ee0746bdef background-mode

Determine whether a dark background is indicated

 #ifndef _WIN32
 #include <signal.h>
 #include <sys/statvfs.h>
 #include <locale.h>
 #include <unistd.h>
+#endif
+
+#ifdef _MSC_VER
+#include <winrt/Windows.UI.ViewManagement.h>
 #endif
 
 #ifdef __APPLE__
 #include <sys/param.h>
 #include <sys/sysctl.h>

     } else {
         setlocale(LC_ALL, startupLocale);
     }
 }
 
+bool
+OSThemeIsDark()
+{
+    SVCERR << "OSThemeIsDark() called" << endl;
+#ifdef _MSC_VER
+    using namespace winrt::Windows::UI::ViewManagement;
+    UISettings settings;
+    auto background = settings.GetColorValue(UIColorType::Background);
+    if (int(background.R) + int(background.G) + int(background.B) < 384) {
+        return true;
+    }
+#endif
+    return false;
+}
+
 double mod(double x, double y) { return x - (y * floor(x / y)); }
 float modf(float x, float y) { return x - (y * floorf(x / y)); }
 
 double princarg(double a) { return mod(a + M_PI, -2 * M_PI) + M_PI; }
 float princargf(float a) { return float(princarg(a)); }