diff --git a/examples/player/main.cpp b/examples/player/main.cpp
index 12c5cc0..8d34b3b 100644
--- a/examples/player/main.cpp
+++ b/examples/player/main.cpp
@@ -27,8 +27,9 @@ void setAppInfo()
 auto main(int argc, char *argv[]) -> int
 {
 #if defined(Q_OS_WIN) && QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-    if (!qEnvironmentVariableIsSet("QT_OPENGL"))
+    if (!qEnvironmentVariableIsSet("QT_OPENGL")) {
         QCoreApplication::setAttribute(Qt::AA_UseOpenGLES);
+    }
 #else
     qputenv("QSG_RHI_BACKEND", "opengl");
 #endif
diff --git a/examples/transcoder/main.cc b/examples/transcoder/main.cc
index 5d9e93b..fe92f34 100644
--- a/examples/transcoder/main.cc
+++ b/examples/transcoder/main.cc
@@ -23,11 +23,12 @@ void setAppInfo()
     qApp->setWindowIcon(qApp->style()->standardIcon(QStyle::SP_DriveDVDIcon));
 }
 
-int main(int argc, char *argv[])
+auto main(int argc, char *argv[]) -> int
 {
 #if defined(Q_OS_WIN) && QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-    if (!qEnvironmentVariableIsSet("QT_OPENGL"))
+    if (!qEnvironmentVariableIsSet("QT_OPENGL")) {
         QCoreApplication::setAttribute(Qt::AA_UseOpenGLES);
+    }
 #else
     qputenv("QSG_RHI_BACKEND", "opengl");
 #endif
diff --git a/utils/hostosinfo.h b/utils/hostosinfo.h
index 9d02249..0340984 100644
--- a/utils/hostosinfo.h
+++ b/utils/hostosinfo.h
@@ -42,7 +42,7 @@ namespace Utils {
 class UTILS_EXPORT HostOsInfo
 {
 public:
-    static constexpr OsType hostOs()
+    static constexpr auto hostOs() -> OsType
     {
 #if defined(Q_OS_WIN)
         return OsTypeWindows;
@@ -57,14 +57,19 @@ class UTILS_EXPORT HostOsInfo
 #endif
     }
 
-    enum HostArchitecture { HostArchitectureX86, HostArchitectureAMD64, HostArchitectureItanium,
-                            HostArchitectureArm, HostArchitectureUnknown };
-    static HostArchitecture hostArchitecture();
-
-    static constexpr bool isWindowsHost() { return hostOs() == OsTypeWindows; }
-    static constexpr bool isLinuxHost() { return hostOs() == OsTypeLinux; }
-    static constexpr bool isMacHost() { return hostOs() == OsTypeMac; }
-    static constexpr bool isAnyUnixHost()
+    enum HostArchitecture {
+        HostArchitectureX86,
+        HostArchitectureAMD64,
+        HostArchitectureItanium,
+        HostArchitectureArm,
+        HostArchitectureUnknown
+    };
+    static auto hostArchitecture() -> HostArchitecture;
+
+    static constexpr auto isWindowsHost() -> bool { return hostOs() == OsTypeWindows; }
+    static constexpr auto isLinuxHost() -> bool { return hostOs() == OsTypeLinux; }
+    static constexpr auto isMacHost() -> bool { return hostOs() == OsTypeMac; }
+    static constexpr auto isAnyUnixHost() -> bool
     {
 #ifdef Q_OS_UNIX
         return true;
@@ -73,7 +78,7 @@ class UTILS_EXPORT HostOsInfo
 #endif
     }
 
-    static QString withExecutableSuffix(const QString &executable)
+    static auto withExecutableSuffix(const QString &executable) -> QString
     {
         return OsSpecificAspects::withExecutableSuffix(hostOs(), executable);
     }
@@ -84,21 +89,18 @@ class UTILS_EXPORT HostOsInfo
     static Qt::CaseSensitivity fileNameCaseSensitivity()
     {
         return m_useOverrideFileNameCaseSensitivity
-                ? m_overrideFileNameCaseSensitivity
-                : OsSpecificAspects::fileNameCaseSensitivity(hostOs());
+                   ? m_overrideFileNameCaseSensitivity
+                   : OsSpecificAspects::fileNameCaseSensitivity(hostOs());
     }
 
-    static QChar pathListSeparator()
-    {
-        return OsSpecificAspects::pathListSeparator(hostOs());
-    }
+    static QChar pathListSeparator() { return OsSpecificAspects::pathListSeparator(hostOs()); }
 
     static Qt::KeyboardModifier controlModifier()
     {
         return OsSpecificAspects::controlModifier(hostOs());
     }
 
-    static bool canCreateOpenGLContext(QString *errorMessage);
+    static auto canCreateOpenGLContext(QString *errorMessage) -> bool;
 
 private:
     static Qt::CaseSensitivity m_overrideFileNameCaseSensitivity;
diff --git a/utils/osspecificaspects.h b/utils/osspecificaspects.h
index 1a5bec0..d60a584 100644
--- a/utils/osspecificaspects.h
+++ b/utils/osspecificaspects.h
@@ -38,7 +38,7 @@ enum OsType { OsTypeWindows, OsTypeLinux, OsTypeMac, OsTypeOtherUnix, OsTypeOthe
 
 namespace OsSpecificAspects {
 
-inline QString withExecutableSuffix(OsType osType, const QString &executable)
+inline auto withExecutableSuffix(OsType osType, const QString &executable) -> QString
 {
     QString finalName = executable;
     if (osType == OsTypeWindows)
@@ -66,7 +66,7 @@ inline Qt::KeyboardModifier controlModifier(OsType osType)
     return osType == OsTypeMac ? Qt::MetaModifier : Qt::ControlModifier;
 }
 
-inline QString pathWithNativeSeparators(OsType osType, const QString &pathName)
+inline auto pathWithNativeSeparators(OsType osType, const QString &pathName) -> QString
 {
     if (osType == OsTypeWindows) {
         const int pos = pathName.indexOf('/');
diff --git a/utils/utils.cpp b/utils/utils.cpp
index 0856423..5da4c15 100644
--- a/utils/utils.cpp
+++ b/utils/utils.cpp
@@ -58,7 +58,7 @@ void Utils::windowCenter(QWidget *window)
     window->move(x, y);
 }
 
-QString compilerString()
+auto compilerString() -> QString
 {
 #if defined(__apple_build_version__) // Apple clang has other version numbers
     QString isAppleString = QLatin1String(" (Apple)");
@@ -83,23 +83,17 @@ void Utils::printBuildInfo()
 
 void Utils::setHighDpiEnvironmentVariable()
 {
-    if (Utils::HostOsInfo().isMacHost()) {
+    if (Utils::HostOsInfo::isMacHost()) {
         return;
     }
-    if (Utils::HostOsInfo().isWindowsHost() && !qEnvironmentVariableIsSet("QT_OPENGL")) {
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-        QCoreApplication::setAttribute(Qt::AA_UseOpenGLES);
-#endif
-    }
 
-    if (Utils::HostOsInfo().isWindowsHost()
+    if (Utils::HostOsInfo::isWindowsHost()
         && !qEnvironmentVariableIsSet("QT_DEVICE_PIXEL_RATIO") // legacy in 5.6, but still functional
         && !qEnvironmentVariableIsSet("QT_AUTO_SCREEN_SCALE_FACTOR")
         && !qEnvironmentVariableIsSet("QT_SCALE_FACTOR")
         && !qEnvironmentVariableIsSet("QT_SCREEN_SCALE_FACTORS")) {
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
         QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
-        QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
 #endif
     }
 
@@ -117,7 +111,7 @@ void Utils::reboot()
     QApplication::exit();
 }
 
-qint64 calculateDir(const QString &localPath)
+auto calculateDir(const QString &localPath) -> qint64
 {
     qint64 size = 0;
     QDir dir(localPath);
@@ -136,7 +130,7 @@ qint64 calculateDir(const QString &localPath)
     return size;
 }
 
-qint64 Utils::fileSize(const QString &localPath)
+auto Utils::fileSize(const QString &localPath) -> qint64
 {
     QFileInfo info(localPath);
     if (info.isDir()) {
@@ -146,7 +140,7 @@ qint64 Utils::fileSize(const QString &localPath)
     }
 }
 
-bool Utils::generateDirectorys(const QString &directory)
+auto Utils::generateDirectorys(const QString &directory) -> bool
 {
     QDir sourceDir(directory);
     if (sourceDir.exists()) {
@@ -188,7 +182,7 @@ void removeFiles(const QString &path)
     }
 }
 
-static QString errnoToQString(int error)
+static auto errnoToQString(int error) -> QString
 {
 #if defined(Q_OS_WIN) && !defined(Q_CC_MINGW)
     char msg[128];
@@ -229,7 +223,7 @@ void Utils::removeDirectory(const QString &path)
     }
 }
 
-QString Utils::convertBytesToString(qint64 bytes)
+auto Utils::convertBytesToString(qint64 bytes) -> QString
 {
     const QStringList list = {"B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"};
     const int unit = 1024;
@@ -276,7 +270,7 @@ void Utils::setGlobalThreadPoolMaxSize(int maxSize)
     instance->setMaxThreadCount(qMax(4, 2 * instance->maxThreadCount()));
 }
 
-QString Utils::getConfigPath()
+auto Utils::getConfigPath() -> QString
 {
     static QString path;
     if (path.isEmpty()) {