Load QtQuick settings

Summary:
Loads settings on whether QtQuick uses GL or software rendering

Aurorae needed a fix. The rest "just works" with up-to-date plasma framework.

Test Plan:
Alt tabbed
Showed an OSD
Grepped kwin's QML for any custom shaders.
(which is the only part that doesn't work here)

Reviewers: #plasma, graesslin

Reviewed By: #plasma, graesslin

Subscribers: graesslin, plasma-devel, kwin, #kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D8040

CMakeLists.txt

@@ -555,6 +555,7 @@ set(kwin_KDE_LIBS
     KF5::Package
     KF5::Plasma
     KF5::WindowSystem
+    KF5::QuickAddons
     KDecoration2::KDecoration
     KDecoration2::KDecoration2Private
     PW::KScreenLocker

main_wayland.cpp

@@ -35,6 +35,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <KLocalizedString>
 #include <KPluginLoader>
 #include <KPluginMetaData>
+#include <KQuickAddons/QtQuickSettings>
+
 // Qt
 #include <qplatformdefs.h>
 #include <QAbstractEventDispatcher>
@@ -547,6 +549,7 @@ int main(int argc, char * argv[])
     setenv("QT_QPA_PLATFORM", "wayland", true);
 
     KWin::Application::createAboutData();
+    KQuickAddons::QtQuickSettings::init();
 
     const auto availablePlugins = KPluginLoader::findPlugins(QStringLiteral("org.kde.kwin.waylandbackends"));
     auto hasPlugin = [&availablePlugins] (const QString &name) {

main_x11.cpp

@@ -33,6 +33,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include <KLocalizedString>
 #include <KPluginLoader>
 #include <KPluginMetaData>
+#include <KQuickAddons/QtQuickSettings>
 // Qt
 #include <qplatformdefs.h>
 #include <QComboBox>
@@ -412,6 +413,7 @@ KWIN_EXPORT int kdemain(int argc, char * argv[])
     a.setupTranslator();
 
     KWin::Application::createAboutData();
+    KQuickAddons::QtQuickSettings::init();
 
     QCommandLineOption replaceOption(QStringLiteral("replace"), i18n("Replace already-running ICCCM2.0-compliant window manager"));