diff --git a/autotests/wayland/debug_console_test.cpp b/autotests/wayland/debug_console_test.cpp
index e5463d940b..2b263583c1 100644
--- a/autotests/wayland/debug_console_test.cpp
+++ b/autotests/wayland/debug_console_test.cpp
@@ -60,8 +60,8 @@ void DebugConsoleTest::initTestCase()
     qRegisterMetaType<KWin::AbstractClient*>();
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
-    QMetaObject::invokeMethod(waylandServer()->backend(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
+    QMetaObject::invokeMethod(kwinApp()->platform(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
     waylandServer()->init(s_socketName.toLocal8Bit());
 
     kwinApp()->start();
diff --git a/autotests/wayland/decoration_input_test.cpp b/autotests/wayland/decoration_input_test.cpp
index 07bee5201d..56474cb96d 100644
--- a/autotests/wayland/decoration_input_test.cpp
+++ b/autotests/wayland/decoration_input_test.cpp
@@ -74,13 +74,13 @@ private:
 };
 
 #define MOTION(target) \
-    waylandServer()->backend()->pointerMotion(target, timestamp++)
+    kwinApp()->platform()->pointerMotion(target, timestamp++)
 
 #define PRESS \
-    waylandServer()->backend()->pointerButtonPressed(BTN_LEFT, timestamp++)
+    kwinApp()->platform()->pointerButtonPressed(BTN_LEFT, timestamp++)
 
 #define RELEASE \
-    waylandServer()->backend()->pointerButtonReleased(BTN_LEFT, timestamp++)
+    kwinApp()->platform()->pointerButtonReleased(BTN_LEFT, timestamp++)
 
 AbstractClient *DecorationInputTest::showWindow()
 {
@@ -130,8 +130,8 @@ void DecorationInputTest::initTestCase()
     qRegisterMetaType<KWin::AbstractClient*>();
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
-    QMetaObject::invokeMethod(waylandServer()->backend(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
+    QMetaObject::invokeMethod(kwinApp()->platform(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
     waylandServer()->init(s_socketName.toLocal8Bit());
 
     // change some options
@@ -254,13 +254,13 @@ void DecorationInputTest::testAxis()
 
     // TODO: mouse wheel direction looks wrong to me
     // simulate wheel
-    waylandServer()->backend()->pointerAxisVertical(5.0, timestamp++);
+    kwinApp()->platform()->pointerAxisVertical(5.0, timestamp++);
     QVERIFY(c->keepBelow());
     QVERIFY(!c->keepAbove());
-    waylandServer()->backend()->pointerAxisVertical(-5.0, timestamp++);
+    kwinApp()->platform()->pointerAxisVertical(-5.0, timestamp++);
     QVERIFY(!c->keepBelow());
     QVERIFY(!c->keepAbove());
-    waylandServer()->backend()->pointerAxisVertical(-5.0, timestamp++);
+    kwinApp()->platform()->pointerAxisVertical(-5.0, timestamp++);
     QVERIFY(!c->keepBelow());
     QVERIFY(c->keepAbove());
 }
diff --git a/autotests/wayland/dont_crash_cancel_animation.cpp b/autotests/wayland/dont_crash_cancel_animation.cpp
index a2ade19eb4..8e2bb8cd0a 100644
--- a/autotests/wayland/dont_crash_cancel_animation.cpp
+++ b/autotests/wayland/dont_crash_cancel_animation.cpp
@@ -71,7 +71,7 @@ void DontCrashCancelAnimationFromAnimationEndedTest::initTestCase()
     qRegisterMetaType<KWin::Deleted*>();
     qRegisterMetaType<KWin::ShellClient*>();
     qRegisterMetaType<KWin::AbstractClient*>();
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
     waylandServer()->init(s_socketName.toLocal8Bit());
     kwinApp()->start();
     QVERIFY(Compositor::self());
diff --git a/autotests/wayland/dont_crash_glxgears.cpp b/autotests/wayland/dont_crash_glxgears.cpp
index 3ce7dbed01..4dfee5fad2 100644
--- a/autotests/wayland/dont_crash_glxgears.cpp
+++ b/autotests/wayland/dont_crash_glxgears.cpp
@@ -46,7 +46,7 @@ void DontCrashGlxgearsTest::initTestCase()
     qRegisterMetaType<KWin::Deleted*>();
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
     waylandServer()->init(s_socketName.toLocal8Bit());
     kwinApp()->start();
     QVERIFY(workspaceCreatedSpy.wait());
diff --git a/autotests/wayland/input_stacking_order.cpp b/autotests/wayland/input_stacking_order.cpp
index 631575689b..8d410c2953 100644
--- a/autotests/wayland/input_stacking_order.cpp
+++ b/autotests/wayland/input_stacking_order.cpp
@@ -73,8 +73,8 @@ void InputStackingOrderTest::initTestCase()
     qRegisterMetaType<KWin::Deleted*>();
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
-    QMetaObject::invokeMethod(waylandServer()->backend(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
+    QMetaObject::invokeMethod(kwinApp()->platform(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
     waylandServer()->init(s_socketName.toLocal8Bit());
 
     kwinApp()->start();
@@ -220,7 +220,7 @@ void InputStackingOrderTest::testPointerFocusUpdatesOnStackingOrderChange()
     QCOMPARE(window1->geometry(), window2->geometry());
 
     // enter
-    waylandServer()->backend()->pointerMotion(QPointF(25, 25), 1);
+    kwinApp()->platform()->pointerMotion(QPointF(25, 25), 1);
     QVERIFY(enteredSpy.wait());
     QCOMPARE(enteredSpy.count(), 1);
     // window 2 should have focus
diff --git a/autotests/wayland/internal_window.cpp b/autotests/wayland/internal_window.cpp
index af449c3797..6c49bfd169 100644
--- a/autotests/wayland/internal_window.cpp
+++ b/autotests/wayland/internal_window.cpp
@@ -142,8 +142,8 @@ void InternalWindowTest::initTestCase()
     qRegisterMetaType<KWin::AbstractClient*>();
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
-    QMetaObject::invokeMethod(waylandServer()->backend(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
+    QMetaObject::invokeMethod(kwinApp()->platform(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
     waylandServer()->init(s_socketName.toLocal8Bit());
 
     kwinApp()->start();
@@ -182,14 +182,14 @@ void InternalWindowTest::testEnterLeave()
     QVERIFY(moveSpy.isValid());
 
     quint32 timestamp = 1;
-    waylandServer()->backend()->pointerMotion(QPoint(50, 50), timestamp++);
+    kwinApp()->platform()->pointerMotion(QPoint(50, 50), timestamp++);
     QTRY_COMPARE(enterSpy.count(), 1);
 
-    waylandServer()->backend()->pointerMotion(QPoint(60, 50), timestamp++);
+    kwinApp()->platform()->pointerMotion(QPoint(60, 50), timestamp++);
     QTRY_COMPARE(moveSpy.count(), 1);
     QCOMPARE(moveSpy.first().first().toPoint(), QPoint(60, 50));
 
-    waylandServer()->backend()->pointerMotion(QPoint(101, 50), timestamp++);
+    kwinApp()->platform()->pointerMotion(QPoint(101, 50), timestamp++);
     QTRY_COMPARE(leaveSpy.count(), 1);
 }
 
@@ -209,11 +209,11 @@ void InternalWindowTest::testPointerPressRelease()
     QCOMPARE(clientAddedSpy.count(), 1);
 
     quint32 timestamp = 1;
-    waylandServer()->backend()->pointerMotion(QPoint(50, 50), timestamp++);
+    kwinApp()->platform()->pointerMotion(QPoint(50, 50), timestamp++);
 
-    waylandServer()->backend()->pointerButtonPressed(BTN_LEFT, timestamp++);
+    kwinApp()->platform()->pointerButtonPressed(BTN_LEFT, timestamp++);
     QTRY_COMPARE(pressSpy.count(), 1);
-    waylandServer()->backend()->pointerButtonReleased(BTN_LEFT, timestamp++);
+    kwinApp()->platform()->pointerButtonReleased(BTN_LEFT, timestamp++);
     QTRY_COMPARE(releaseSpy.count(), 1);
 }
 
@@ -230,11 +230,11 @@ void InternalWindowTest::testPointerAxis()
     QCOMPARE(clientAddedSpy.count(), 1);
 
     quint32 timestamp = 1;
-    waylandServer()->backend()->pointerMotion(QPoint(50, 50), timestamp++);
+    kwinApp()->platform()->pointerMotion(QPoint(50, 50), timestamp++);
 
-    waylandServer()->backend()->pointerAxisVertical(5.0, timestamp++);
+    kwinApp()->platform()->pointerAxisVertical(5.0, timestamp++);
     QTRY_COMPARE(wheelSpy.count(), 1);
-    waylandServer()->backend()->pointerAxisHorizontal(5.0, timestamp++);
+    kwinApp()->platform()->pointerAxisHorizontal(5.0, timestamp++);
     QTRY_COMPARE(wheelSpy.count(), 2);
 }
 
@@ -262,12 +262,12 @@ void InternalWindowTest::testKeyboard()
 
     quint32 timestamp = 1;
     QFETCH(QPoint, cursorPos);
-    waylandServer()->backend()->pointerMotion(cursorPos, timestamp++);
+    kwinApp()->platform()->pointerMotion(cursorPos, timestamp++);
 
-    waylandServer()->backend()->keyboardKeyPressed(KEY_A, timestamp++);
+    kwinApp()->platform()->keyboardKeyPressed(KEY_A, timestamp++);
     QTRY_COMPARE(pressSpy.count(), 1);
     QCOMPARE(releaseSpy.count(), 0);
-    waylandServer()->backend()->keyboardKeyReleased(KEY_A, timestamp++);
+    kwinApp()->platform()->keyboardKeyReleased(KEY_A, timestamp++);
     QTRY_COMPARE(releaseSpy.count(), 1);
     QCOMPARE(pressSpy.count(), 1);
 }
diff --git a/autotests/wayland/kwin_wayland_test.cpp b/autotests/wayland/kwin_wayland_test.cpp
index 6cacc6a082..0d12834a53 100644
--- a/autotests/wayland/kwin_wayland_test.cpp
+++ b/autotests/wayland/kwin_wayland_test.cpp
@@ -55,7 +55,7 @@ WaylandTestApplication::WaylandTestApplication(int &argc, char **argv)
 
 WaylandTestApplication::~WaylandTestApplication()
 {
-    waylandServer()->backend()->setOutputsEnabled(false);
+    kwinApp()->platform()->setOutputsEnabled(false);
     destroyWorkspace();
     waylandServer()->dispatch();
     // need to unload all effects prior to destroying X connection as they might do X calls
@@ -94,7 +94,7 @@ void WaylandTestApplication::performStartup()
 
 void WaylandTestApplication::createBackend()
 {
-    AbstractBackend *backend = waylandServer()->backend();
+    AbstractBackend *backend = kwinApp()->platform();
     connect(backend, &AbstractBackend::screensQueried, this, &WaylandTestApplication::continueStartupWithScreens);
     connect(backend, &AbstractBackend::initFailed, this,
         [] () {
@@ -107,7 +107,7 @@ void WaylandTestApplication::createBackend()
 
 void WaylandTestApplication::continueStartupWithScreens()
 {
-    disconnect(waylandServer()->backend(), &AbstractBackend::screensQueried, this, &WaylandTestApplication::continueStartupWithScreens);
+    disconnect(kwinApp()->platform(), &AbstractBackend::screensQueried, this, &WaylandTestApplication::continueStartupWithScreens);
     createScreens();
     waylandServer()->initOutputs();
 
diff --git a/autotests/wayland/lockscreen.cpp b/autotests/wayland/lockscreen.cpp
index 243aa13e10..49014915f7 100644
--- a/autotests/wayland/lockscreen.cpp
+++ b/autotests/wayland/lockscreen.cpp
@@ -128,19 +128,19 @@ Q_SIGNALS:
     QVERIFY(!waylandServer()->isScreenLocked());
 
 #define MOTION(target) \
-    waylandServer()->backend()->pointerMotion(target, timestamp++)
+    kwinApp()->platform()->pointerMotion(target, timestamp++)
 
 #define PRESS \
-    waylandServer()->backend()->pointerButtonPressed(BTN_LEFT, timestamp++)
+    kwinApp()->platform()->pointerButtonPressed(BTN_LEFT, timestamp++)
 
 #define RELEASE \
-    waylandServer()->backend()->pointerButtonReleased(BTN_LEFT, timestamp++)
+    kwinApp()->platform()->pointerButtonReleased(BTN_LEFT, timestamp++)
 
 #define KEYPRESS( key ) \
-    waylandServer()->backend()->keyboardKeyPressed(key, timestamp++)
+    kwinApp()->platform()->keyboardKeyPressed(key, timestamp++)
 
 #define KEYRELEASE( key ) \
-    waylandServer()->backend()->keyboardKeyReleased(key, timestamp++)
+    kwinApp()->platform()->keyboardKeyReleased(key, timestamp++)
 
 void LockScreenTest::unlock()
 {
@@ -196,8 +196,8 @@ void LockScreenTest::initTestCase()
     qRegisterMetaType<KWin::AbstractClient*>();
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
-    QMetaObject::invokeMethod(waylandServer()->backend(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
+    QMetaObject::invokeMethod(kwinApp()->platform(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
     waylandServer()->init(s_socketName.toLocal8Bit());
 
     kwinApp()->start();
@@ -390,24 +390,24 @@ void LockScreenTest::testPointerAxis()
     quint32 timestamp = 1;
     MOTION(c->geometry().center());
     // and simulate axis
-    waylandServer()->backend()->pointerAxisHorizontal(5.0, timestamp++);
+    kwinApp()->platform()->pointerAxisHorizontal(5.0, timestamp++);
     QVERIFY(axisChangedSpy.wait());
 
     LOCK
 
     // and simulate axis
-    waylandServer()->backend()->pointerAxisHorizontal(5.0, timestamp++);
+    kwinApp()->platform()->pointerAxisHorizontal(5.0, timestamp++);
     QVERIFY(!axisChangedSpy.wait(100));
-    waylandServer()->backend()->pointerAxisVertical(5.0, timestamp++);
+    kwinApp()->platform()->pointerAxisVertical(5.0, timestamp++);
     QVERIFY(!axisChangedSpy.wait(100));
 
     // and unlock
     UNLOCK
 
     // and move axis again
-    waylandServer()->backend()->pointerAxisHorizontal(5.0, timestamp++);
+    kwinApp()->platform()->pointerAxisHorizontal(5.0, timestamp++);
     QVERIFY(axisChangedSpy.wait());
-    waylandServer()->backend()->pointerAxisVertical(5.0, timestamp++);
+    kwinApp()->platform()->pointerAxisVertical(5.0, timestamp++);
     QVERIFY(axisChangedSpy.wait());
 }
 
@@ -621,32 +621,32 @@ void LockScreenTest::testMoveWindow()
     workspace()->slotWindowMove();
     QCOMPARE(workspace()->getMovingClient(), c);
     QVERIFY(c->isMove());
-    waylandServer()->backend()->keyboardKeyPressed(KEY_RIGHT, timestamp++);
-    waylandServer()->backend()->keyboardKeyReleased(KEY_RIGHT, timestamp++);
+    kwinApp()->platform()->keyboardKeyPressed(KEY_RIGHT, timestamp++);
+    kwinApp()->platform()->keyboardKeyReleased(KEY_RIGHT, timestamp++);
     QEXPECT_FAIL("", "First event is ignored", Continue);
     QCOMPARE(clientStepUserMovedResizedSpy.count(), 1);
 
     // TODO adjust once the expected fail is fixed
-    waylandServer()->backend()->keyboardKeyPressed(KEY_RIGHT, timestamp++);
-    waylandServer()->backend()->keyboardKeyReleased(KEY_RIGHT, timestamp++);
+    kwinApp()->platform()->keyboardKeyPressed(KEY_RIGHT, timestamp++);
+    kwinApp()->platform()->keyboardKeyReleased(KEY_RIGHT, timestamp++);
     QCOMPARE(clientStepUserMovedResizedSpy.count(), 1);
 
     // while locking our window should continue to be in move resize
     LOCK
     QCOMPARE(workspace()->getMovingClient(), c);
     QVERIFY(c->isMove());
-    waylandServer()->backend()->keyboardKeyPressed(KEY_RIGHT, timestamp++);
-    waylandServer()->backend()->keyboardKeyReleased(KEY_RIGHT, timestamp++);
+    kwinApp()->platform()->keyboardKeyPressed(KEY_RIGHT, timestamp++);
+    kwinApp()->platform()->keyboardKeyReleased(KEY_RIGHT, timestamp++);
     QCOMPARE(clientStepUserMovedResizedSpy.count(), 1);
 
     UNLOCK
     QCOMPARE(workspace()->getMovingClient(), c);
     QVERIFY(c->isMove());
-    waylandServer()->backend()->keyboardKeyPressed(KEY_RIGHT, timestamp++);
-    waylandServer()->backend()->keyboardKeyReleased(KEY_RIGHT, timestamp++);
+    kwinApp()->platform()->keyboardKeyPressed(KEY_RIGHT, timestamp++);
+    kwinApp()->platform()->keyboardKeyReleased(KEY_RIGHT, timestamp++);
     QCOMPARE(clientStepUserMovedResizedSpy.count(), 2);
-    waylandServer()->backend()->keyboardKeyPressed(KEY_ESC, timestamp++);
-    waylandServer()->backend()->keyboardKeyReleased(KEY_ESC, timestamp++);
+    kwinApp()->platform()->keyboardKeyPressed(KEY_ESC, timestamp++);
+    kwinApp()->platform()->keyboardKeyReleased(KEY_ESC, timestamp++);
     QVERIFY(!c->isMove());
 }
 
@@ -661,12 +661,12 @@ void LockScreenTest::testPointerShortcut()
     // try to trigger the shortcut
     quint32 timestamp = 1;
 #define PERFORM(expectedCount) \
-    waylandServer()->backend()->keyboardKeyPressed(KEY_LEFTMETA, timestamp++); \
+    kwinApp()->platform()->keyboardKeyPressed(KEY_LEFTMETA, timestamp++); \
     PRESS; \
     QCoreApplication::instance()->processEvents(); \
     QCOMPARE(actionSpy.count(), expectedCount); \
     RELEASE; \
-    waylandServer()->backend()->keyboardKeyReleased(KEY_LEFTMETA, timestamp++); \
+    kwinApp()->platform()->keyboardKeyReleased(KEY_LEFTMETA, timestamp++); \
     QCoreApplication::instance()->processEvents(); \
     QCOMPARE(actionSpy.count(), expectedCount);
 
@@ -713,14 +713,14 @@ void LockScreenTest::testAxisShortcut()
     // try to trigger the shortcut
     quint32 timestamp = 1;
 #define PERFORM(expectedCount) \
-    waylandServer()->backend()->keyboardKeyPressed(KEY_LEFTMETA, timestamp++); \
+    kwinApp()->platform()->keyboardKeyPressed(KEY_LEFTMETA, timestamp++); \
     if (direction == Qt::Vertical) \
-        waylandServer()->backend()->pointerAxisVertical(sign * 5.0, timestamp++); \
+        kwinApp()->platform()->pointerAxisVertical(sign * 5.0, timestamp++); \
     else \
-        waylandServer()->backend()->pointerAxisHorizontal(sign * 5.0, timestamp++); \
+        kwinApp()->platform()->pointerAxisHorizontal(sign * 5.0, timestamp++); \
     QCoreApplication::instance()->processEvents(); \
     QCOMPARE(actionSpy.count(), expectedCount); \
-    waylandServer()->backend()->keyboardKeyReleased(KEY_LEFTMETA, timestamp++); \
+    kwinApp()->platform()->keyboardKeyReleased(KEY_LEFTMETA, timestamp++); \
     QCoreApplication::instance()->processEvents(); \
     QCOMPARE(actionSpy.count(), expectedCount);
 
@@ -792,24 +792,24 @@ void LockScreenTest::testTouch()
     QVERIFY(pointRemovedSpy.isValid());
 
     quint32 timestamp = 1;
-    waylandServer()->backend()->touchDown(1, QPointF(25, 25), timestamp++);
+    kwinApp()->platform()->touchDown(1, QPointF(25, 25), timestamp++);
     QVERIFY(sequenceStartedSpy.wait());
     QCOMPARE(sequenceStartedSpy.count(), 1);
 
     LOCK
     QVERIFY(cancelSpy.wait());
 
-    waylandServer()->backend()->touchUp(1, timestamp++);
+    kwinApp()->platform()->touchUp(1, timestamp++);
     QVERIFY(!pointRemovedSpy.wait(100));
-    waylandServer()->backend()->touchDown(1, QPointF(25, 25), timestamp++);
-    waylandServer()->backend()->touchMotion(1, QPointF(26, 26), timestamp++);
-    waylandServer()->backend()->touchUp(1, timestamp++);
+    kwinApp()->platform()->touchDown(1, QPointF(25, 25), timestamp++);
+    kwinApp()->platform()->touchMotion(1, QPointF(26, 26), timestamp++);
+    kwinApp()->platform()->touchUp(1, timestamp++);
 
     UNLOCK
-    waylandServer()->backend()->touchDown(1, QPointF(25, 25), timestamp++);
+    kwinApp()->platform()->touchDown(1, QPointF(25, 25), timestamp++);
     QVERIFY(sequenceStartedSpy.wait());
     QCOMPARE(sequenceStartedSpy.count(), 2);
-    waylandServer()->backend()->touchUp(1, timestamp++);
+    kwinApp()->platform()->touchUp(1, timestamp++);
     QVERIFY(pointRemovedSpy.wait());
     QCOMPARE(pointRemovedSpy.count(), 1);
 }
diff --git a/autotests/wayland/move_resize_window_test.cpp b/autotests/wayland/move_resize_window_test.cpp
index 93a0e9519e..bf31b3f29b 100644
--- a/autotests/wayland/move_resize_window_test.cpp
+++ b/autotests/wayland/move_resize_window_test.cpp
@@ -83,7 +83,7 @@ void MoveResizeWindowTest::initTestCase()
     qRegisterMetaType<KWin::MaximizeMode>("MaximizeMode");
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
     waylandServer()->init(s_socketName.toLocal8Bit());
     kwinApp()->start();
     QVERIFY(workspaceCreatedSpy.wait());
@@ -506,22 +506,22 @@ void MoveResizeWindowTest::testPointerMoveEnd()
 
     // let's trigger the left button
     quint32 timestamp = 1;
-    waylandServer()->backend()->pointerButtonPressed(BTN_LEFT, timestamp++);
+    kwinApp()->platform()->pointerButtonPressed(BTN_LEFT, timestamp++);
     QVERIFY(!c->isMove());
     workspace()->slotWindowMove();
     QVERIFY(c->isMove());
 
     // let's press another button
     QFETCH(int, additionalButton);
-    waylandServer()->backend()->pointerButtonPressed(additionalButton, timestamp++);
+    kwinApp()->platform()->pointerButtonPressed(additionalButton, timestamp++);
     QVERIFY(c->isMove());
 
     // release the left button, should still have the window moving
-    waylandServer()->backend()->pointerButtonReleased(BTN_LEFT, timestamp++);
+    kwinApp()->platform()->pointerButtonReleased(BTN_LEFT, timestamp++);
     QVERIFY(c->isMove());
 
     // but releasing the other button should now end moving
-    waylandServer()->backend()->pointerButtonReleased(additionalButton, timestamp++);
+    kwinApp()->platform()->pointerButtonReleased(additionalButton, timestamp++);
     QVERIFY(!c->isMove());
 }
 
diff --git a/autotests/wayland/platformcursor.cpp b/autotests/wayland/platformcursor.cpp
index 1a50ecf099..fecf208ae2 100644
--- a/autotests/wayland/platformcursor.cpp
+++ b/autotests/wayland/platformcursor.cpp
@@ -39,7 +39,7 @@ void PlatformCursorTest::initTestCase()
 {
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
     waylandServer()->init(s_socketName.toLocal8Bit());
     kwinApp()->start();
     QVERIFY(workspaceCreatedSpy.wait());
diff --git a/autotests/wayland/pointer_input.cpp b/autotests/wayland/pointer_input.cpp
index 89bdb4ffa3..b4e7360c8b 100644
--- a/autotests/wayland/pointer_input.cpp
+++ b/autotests/wayland/pointer_input.cpp
@@ -91,8 +91,8 @@ void PointerInputTest::initTestCase()
     qRegisterMetaType<KWin::Deleted*>();
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
-    QMetaObject::invokeMethod(waylandServer()->backend(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
+    QMetaObject::invokeMethod(kwinApp()->platform(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
     waylandServer()->init(s_socketName.toLocal8Bit());
 
     kwinApp()->setConfig(KSharedConfig::openConfig(QString(), KConfig::SimpleConfig));
@@ -272,7 +272,7 @@ void PointerInputTest::testWarpingGeneratesPointerMotion()
     QVERIFY(window);
 
     // enter
-    waylandServer()->backend()->pointerMotion(QPointF(25, 25), 1);
+    kwinApp()->platform()->pointerMotion(QPointF(25, 25), 1);
     QVERIFY(enteredSpy.wait());
     // we get a move event together with the enter, that's actually wrong but also shouldn't harm
     QVERIFY(movedSpy.wait());
@@ -317,8 +317,8 @@ void PointerInputTest::testUpdateFocusAfterScreenChange()
     QSignalSpy screensChangedSpy(screens(), &Screens::changed);
     QVERIFY(screensChangedSpy.isValid());
     // now let's remove the screen containing the cursor
-    QMetaObject::invokeMethod(waylandServer()->backend(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 1));
-    QMetaObject::invokeMethod(waylandServer()->backend(), "sizeChanged", Qt::QueuedConnection);
+    QMetaObject::invokeMethod(kwinApp()->platform(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 1));
+    QMetaObject::invokeMethod(kwinApp()->platform(), "sizeChanged", Qt::QueuedConnection);
     QVERIFY(screensChangedSpy.wait());
     QCOMPARE(screens()->count(), 1);
 
@@ -399,15 +399,15 @@ void PointerInputTest::testModifierClickUnrestrictedMove()
     quint32 timestamp = 1;
     QFETCH(int, modifierKey);
     QFETCH(int, mouseButton);
-    waylandServer()->backend()->keyboardKeyPressed(modifierKey, timestamp++);
+    kwinApp()->platform()->keyboardKeyPressed(modifierKey, timestamp++);
     QVERIFY(!window->isMove());
-    waylandServer()->backend()->pointerButtonPressed(mouseButton, timestamp++);
+    kwinApp()->platform()->pointerButtonPressed(mouseButton, timestamp++);
     QVERIFY(window->isMove());
     // release modifier should not change it
-    waylandServer()->backend()->keyboardKeyReleased(modifierKey, timestamp++);
+    kwinApp()->platform()->keyboardKeyReleased(modifierKey, timestamp++);
     QVERIFY(window->isMove());
     // but releasing the key should end move/resize
-    waylandServer()->backend()->pointerButtonReleased(mouseButton, timestamp++);
+    kwinApp()->platform()->pointerButtonReleased(mouseButton, timestamp++);
     QVERIFY(!window->isMove());
 
     // all of that should not have triggered button events on the surface
@@ -471,12 +471,12 @@ void PointerInputTest::testModifierScrollOpacity()
     // simulate modifier+wheel
     quint32 timestamp = 1;
     QFETCH(int, modifierKey);
-    waylandServer()->backend()->keyboardKeyPressed(modifierKey, timestamp++);
-    waylandServer()->backend()->pointerAxisVertical(-5, timestamp++);
+    kwinApp()->platform()->keyboardKeyPressed(modifierKey, timestamp++);
+    kwinApp()->platform()->pointerAxisVertical(-5, timestamp++);
     QCOMPARE(window->opacity(), 0.6);
-    waylandServer()->backend()->pointerAxisVertical(5, timestamp++);
+    kwinApp()->platform()->pointerAxisVertical(5, timestamp++);
     QCOMPARE(window->opacity(), 0.5);
-    waylandServer()->backend()->keyboardKeyReleased(modifierKey, timestamp++);
+    kwinApp()->platform()->keyboardKeyReleased(modifierKey, timestamp++);
 
     // axis should have been filtered out
     QCOMPARE(axisSpy.count(), 0);
@@ -524,7 +524,7 @@ void  PointerInputTest::testScrollAction()
 
     quint32 timestamp = 1;
     QVERIFY(!window1->isActive());
-    waylandServer()->backend()->pointerAxisVertical(5, timestamp++);
+    kwinApp()->platform()->pointerAxisVertical(5, timestamp++);
     QVERIFY(window1->isActive());
 
     // but also the wheel event should be passed to the window
@@ -689,7 +689,7 @@ void PointerInputTest::testMouseActionInactiveWindow()
     // and click
     quint32 timestamp = 1;
     QFETCH(quint32, button);
-    waylandServer()->backend()->pointerButtonPressed(button, timestamp++);
+    kwinApp()->platform()->pointerButtonPressed(button, timestamp++);
     // should raise window1 and activate it
     QCOMPARE(stackingOrderChangedSpy.count(), 1);
     QVERIFY(!activeWindowChangedSpy.isEmpty());
@@ -698,7 +698,7 @@ void PointerInputTest::testMouseActionInactiveWindow()
     QVERIFY(!window2->isActive());
 
     // release again
-    waylandServer()->backend()->pointerButtonReleased(button, timestamp++);
+    kwinApp()->platform()->pointerButtonReleased(button, timestamp++);
 }
 
 void PointerInputTest::testMouseActionActiveWindow_data()
@@ -773,7 +773,7 @@ void PointerInputTest::testMouseActionActiveWindow()
     // and click
     quint32 timestamp = 1;
     QFETCH(quint32, button);
-    waylandServer()->backend()->pointerButtonPressed(button, timestamp++);
+    kwinApp()->platform()->pointerButtonPressed(button, timestamp++);
     QVERIFY(buttonSpy.wait());
     if (clickRaise) {
         QCOMPARE(stackingOrderChangedSpy.count(), 1);
@@ -785,7 +785,7 @@ void PointerInputTest::testMouseActionActiveWindow()
     }
 
     // release again
-    waylandServer()->backend()->pointerButtonReleased(button, timestamp++);
+    kwinApp()->platform()->pointerButtonReleased(button, timestamp++);
 }
 
 void PointerInputTest::testCursorImage()
diff --git a/autotests/wayland/quick_tiling_test.cpp b/autotests/wayland/quick_tiling_test.cpp
index ebc596d8bf..db4524cc88 100644
--- a/autotests/wayland/quick_tiling_test.cpp
+++ b/autotests/wayland/quick_tiling_test.cpp
@@ -76,8 +76,8 @@ void QuickTilingTest::initTestCase()
     qRegisterMetaType<KWin::MaximizeMode>("MaximizeMode");
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
-    QMetaObject::invokeMethod(waylandServer()->backend(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
+    QMetaObject::invokeMethod(kwinApp()->platform(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
     waylandServer()->init(s_socketName.toLocal8Bit());
 
     // set custom config which disables the Outline
@@ -428,26 +428,26 @@ void QuickTilingTest::testQuickTilingKeyboardMove()
 
     QFETCH(QPoint, targetPos);
     quint32 timestamp = 1;
-    waylandServer()->backend()->keyboardKeyPressed(KEY_LEFTCTRL, timestamp++);
+    kwinApp()->platform()->keyboardKeyPressed(KEY_LEFTCTRL, timestamp++);
     while (Cursor::pos().x() > targetPos.x()) {
-        waylandServer()->backend()->keyboardKeyPressed(KEY_LEFT, timestamp++);
-        waylandServer()->backend()->keyboardKeyReleased(KEY_LEFT, timestamp++);
+        kwinApp()->platform()->keyboardKeyPressed(KEY_LEFT, timestamp++);
+        kwinApp()->platform()->keyboardKeyReleased(KEY_LEFT, timestamp++);
     }
     while (Cursor::pos().x() < targetPos.x()) {
-        waylandServer()->backend()->keyboardKeyPressed(KEY_RIGHT, timestamp++);
-        waylandServer()->backend()->keyboardKeyReleased(KEY_RIGHT, timestamp++);
+        kwinApp()->platform()->keyboardKeyPressed(KEY_RIGHT, timestamp++);
+        kwinApp()->platform()->keyboardKeyReleased(KEY_RIGHT, timestamp++);
     }
     while (Cursor::pos().y() < targetPos.y()) {
-        waylandServer()->backend()->keyboardKeyPressed(KEY_DOWN, timestamp++);
-        waylandServer()->backend()->keyboardKeyReleased(KEY_DOWN, timestamp++);
+        kwinApp()->platform()->keyboardKeyPressed(KEY_DOWN, timestamp++);
+        kwinApp()->platform()->keyboardKeyReleased(KEY_DOWN, timestamp++);
     }
     while (Cursor::pos().y() > targetPos.y()) {
-        waylandServer()->backend()->keyboardKeyPressed(KEY_UP, timestamp++);
-        waylandServer()->backend()->keyboardKeyReleased(KEY_UP, timestamp++);
+        kwinApp()->platform()->keyboardKeyPressed(KEY_UP, timestamp++);
+        kwinApp()->platform()->keyboardKeyReleased(KEY_UP, timestamp++);
     }
-    waylandServer()->backend()->keyboardKeyReleased(KEY_LEFTCTRL, timestamp++);
-    waylandServer()->backend()->keyboardKeyPressed(KEY_ENTER, timestamp++);
-    waylandServer()->backend()->keyboardKeyReleased(KEY_ENTER, timestamp++);
+    kwinApp()->platform()->keyboardKeyReleased(KEY_LEFTCTRL, timestamp++);
+    kwinApp()->platform()->keyboardKeyPressed(KEY_ENTER, timestamp++);
+    kwinApp()->platform()->keyboardKeyReleased(KEY_ENTER, timestamp++);
     QCOMPARE(Cursor::pos(), targetPos);
     QVERIFY(!workspace()->getMovingClient());
 
@@ -509,9 +509,9 @@ void QuickTilingTest::testQuickTilingPointerMove()
 
     QFETCH(QPoint, targetPos);
     quint32 timestamp = 1;
-    waylandServer()->backend()->pointerMotion(targetPos, timestamp++);
-    waylandServer()->backend()->pointerButtonPressed(BTN_LEFT, timestamp++);
-    waylandServer()->backend()->pointerButtonReleased(BTN_LEFT, timestamp++);
+    kwinApp()->platform()->pointerMotion(targetPos, timestamp++);
+    kwinApp()->platform()->pointerButtonPressed(BTN_LEFT, timestamp++);
+    kwinApp()->platform()->pointerButtonReleased(BTN_LEFT, timestamp++);
     QCOMPARE(Cursor::pos(), targetPos);
     QVERIFY(!workspace()->getMovingClient());
 
diff --git a/autotests/wayland/start_test.cpp b/autotests/wayland/start_test.cpp
index 0b1b4bcc36..acfdff58dd 100644
--- a/autotests/wayland/start_test.cpp
+++ b/autotests/wayland/start_test.cpp
@@ -51,7 +51,7 @@ void StartTest::initTestCase()
 {
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
     waylandServer()->init(s_socketName.toLocal8Bit());
     kwinApp()->start();
     QVERIFY(workspaceCreatedSpy.wait());
diff --git a/autotests/wayland/touch_input_test.cpp b/autotests/wayland/touch_input_test.cpp
index 96f98ab2c4..241314529d 100644
--- a/autotests/wayland/touch_input_test.cpp
+++ b/autotests/wayland/touch_input_test.cpp
@@ -69,8 +69,8 @@ void TouchInputTest::initTestCase()
     qRegisterMetaType<KWin::AbstractClient*>();
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
-    QMetaObject::invokeMethod(waylandServer()->backend(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
+    QMetaObject::invokeMethod(kwinApp()->platform(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
     waylandServer()->init(s_socketName.toLocal8Bit());
 
     kwinApp()->start();
@@ -219,7 +219,7 @@ void TouchInputTest::testMultipleTouchPoints()
     QVERIFY(endedSpy.isValid());
 
     quint32 timestamp = 1;
-    waylandServer()->backend()->touchDown(1, QPointF(125, 125), timestamp++);
+    kwinApp()->platform()->touchDown(1, QPointF(125, 125), timestamp++);
     QVERIFY(sequenceStartedSpy.wait());
     QCOMPARE(sequenceStartedSpy.count(), 1);
     QCOMPARE(m_touch->sequence().count(), 1);
@@ -229,7 +229,7 @@ void TouchInputTest::testMultipleTouchPoints()
     QCOMPARE(pointMovedSpy.count(), 0);
 
     // a point outside the window
-    waylandServer()->backend()->touchDown(2, QPointF(0, 0), timestamp++);
+    kwinApp()->platform()->touchDown(2, QPointF(0, 0), timestamp++);
     QVERIFY(pointAddedSpy.wait());
     QCOMPARE(pointAddedSpy.count(), 1);
     QCOMPARE(m_touch->sequence().count(), 2);
@@ -238,21 +238,21 @@ void TouchInputTest::testMultipleTouchPoints()
     QCOMPARE(pointMovedSpy.count(), 0);
 
     // let's move that one
-    waylandServer()->backend()->touchMotion(2, QPointF(100, 100), timestamp++);
+    kwinApp()->platform()->touchMotion(2, QPointF(100, 100), timestamp++);
     QVERIFY(pointMovedSpy.wait());
     QCOMPARE(pointMovedSpy.count(), 1);
     QCOMPARE(m_touch->sequence().count(), 2);
     QCOMPARE(m_touch->sequence().at(1)->isDown(), true);
     QCOMPARE(m_touch->sequence().at(1)->position(), QPointF(0, 0));
 
-    waylandServer()->backend()->touchUp(1, timestamp++);
+    kwinApp()->platform()->touchUp(1, timestamp++);
     QVERIFY(pointRemovedSpy.wait());
     QCOMPARE(pointRemovedSpy.count(), 1);
     QCOMPARE(m_touch->sequence().count(), 2);
     QCOMPARE(m_touch->sequence().first()->isDown(), false);
     QCOMPARE(endedSpy.count(), 0);
 
-    waylandServer()->backend()->touchUp(2, timestamp++);
+    kwinApp()->platform()->touchUp(2, timestamp++);
     QVERIFY(pointRemovedSpy.wait());
     QCOMPARE(pointRemovedSpy.count(), 2);
     QCOMPARE(m_touch->sequence().count(), 2);
@@ -275,16 +275,16 @@ void TouchInputTest::testCancel()
     QVERIFY(pointRemovedSpy.isValid());
 
     quint32 timestamp = 1;
-    waylandServer()->backend()->touchDown(1, QPointF(125, 125), timestamp++);
+    kwinApp()->platform()->touchDown(1, QPointF(125, 125), timestamp++);
     QVERIFY(sequenceStartedSpy.wait());
     QCOMPARE(sequenceStartedSpy.count(), 1);
 
     // cancel
-    waylandServer()->backend()->touchCancel();
+    kwinApp()->platform()->touchCancel();
     QVERIFY(cancelSpy.wait());
     QCOMPARE(cancelSpy.count(), 1);
 
-    waylandServer()->backend()->touchUp(1, timestamp++);
+    kwinApp()->platform()->touchUp(1, timestamp++);
     QVERIFY(!pointRemovedSpy.wait(100));
     QCOMPARE(pointRemovedSpy.count(), 0);
 }
@@ -307,14 +307,14 @@ void TouchInputTest::testTouchMouseAction()
     QVERIFY(sequenceStartedSpy.isValid());
 
     quint32 timestamp = 1;
-    waylandServer()->backend()->touchDown(1, c1->geometry().center(), timestamp++);
+    kwinApp()->platform()->touchDown(1, c1->geometry().center(), timestamp++);
     QVERIFY(c1->isActive());
 
     QVERIFY(sequenceStartedSpy.wait());
     QCOMPARE(sequenceStartedSpy.count(), 1);
 
     // cleanup
-    waylandServer()->backend()->touchCancel();
+    kwinApp()->platform()->touchCancel();
 }
 
 }
diff --git a/autotests/wayland/transient_no_input_test.cpp b/autotests/wayland/transient_no_input_test.cpp
index 841674aa50..f65fcea20a 100644
--- a/autotests/wayland/transient_no_input_test.cpp
+++ b/autotests/wayland/transient_no_input_test.cpp
@@ -61,7 +61,7 @@ void TransientNoInputTest::initTestCase()
     qRegisterMetaType<KWin::ShellClient*>();
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
     waylandServer()->init(s_socketName.toLocal8Bit());
     kwinApp()->start();
     QVERIFY(workspaceCreatedSpy.wait());
diff --git a/autotests/wayland/transient_placement.cpp b/autotests/wayland/transient_placement.cpp
index 66831a2b41..0921f6523a 100644
--- a/autotests/wayland/transient_placement.cpp
+++ b/autotests/wayland/transient_placement.cpp
@@ -79,8 +79,8 @@ void TransientPlacementTest::initTestCase()
     qRegisterMetaType<KWin::AbstractClient*>();
     QSignalSpy workspaceCreatedSpy(kwinApp(), &Application::workspaceCreated);
     QVERIFY(workspaceCreatedSpy.isValid());
-    waylandServer()->backend()->setInitialWindowSize(QSize(1280, 1024));
-    QMetaObject::invokeMethod(waylandServer()->backend(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
+    kwinApp()->platform()->setInitialWindowSize(QSize(1280, 1024));
+    QMetaObject::invokeMethod(kwinApp()->platform(), "setOutputCount", Qt::DirectConnection, Q_ARG(int, 2));
     waylandServer()->init(s_socketName.toLocal8Bit());
 
     kwinApp()->start();
diff --git a/backends/hwcomposer/hwcomposer_backend.cpp b/backends/hwcomposer/hwcomposer_backend.cpp
index bfbd205000..720ac1d736 100644
--- a/backends/hwcomposer/hwcomposer_backend.cpp
+++ b/backends/hwcomposer/hwcomposer_backend.cpp
@@ -23,6 +23,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "screens_hwcomposer.h"
 #include "composite.h"
 #include "input.h"
+#include "main.h"
 #include "virtual_terminal.h"
 #include "wayland_server.h"
 // KWayland
@@ -225,7 +226,7 @@ void HwcomposerBackend::init()
         if (disp != 0) {
             return;
         }
-        dynamic_cast<HwcomposerBackend*>(waylandServer()->backend())->wakeVSync();
+        dynamic_cast<HwcomposerBackend*>(kwinApp()->platform())->wakeVSync();
     };
     procs->hotplug = [] (const struct hwc_procs* procs, int disp, int connected) {
         Q_UNUSED(procs)
diff --git a/composite.cpp b/composite.cpp
index dab48f4caf..5648c8e760 100644
--- a/composite.cpp
+++ b/composite.cpp
@@ -116,10 +116,10 @@ Compositor::Compositor(QObject* workspace)
     m_unusedSupportPropertyTimer.setSingleShot(true);
     connect(&m_unusedSupportPropertyTimer, SIGNAL(timeout()), SLOT(deleteUnusedSupportProperties()));
     if (kwinApp()->operationMode() != Application::OperationModeX11) {
-        if (waylandServer()->backend()->isReady()) {
+        if (kwinApp()->platform()->isReady()) {
             QMetaObject::invokeMethod(this, "setup", Qt::QueuedConnection);
         }
-        connect(waylandServer()->backend(), &AbstractBackend::readyChanged, this,
+        connect(kwinApp()->platform(), &AbstractBackend::readyChanged, this,
             [this] (bool ready) {
                 if (ready) {
                     setup();
@@ -649,7 +649,7 @@ void Compositor::performCompositing()
 
     // If outputs are disabled, we return to the event loop and
     // continue processing events until the outputs are enabled again
-    if (waylandServer() && !waylandServer()->backend()->areOutputsEnabled()) {
+    if (waylandServer() && !kwinApp()->platform()->areOutputsEnabled()) {
         compositeTimer.stop();
         return;
     }
@@ -796,7 +796,7 @@ void Compositor::setCompositeTimer()
         return;
 
     // Don't start the timer if all outputs are disabled
-    if (waylandServer() && !waylandServer()->backend()->areOutputsEnabled()) {
+    if (waylandServer() && !kwinApp()->platform()->areOutputsEnabled()) {
         return;
     }
 
diff --git a/main_wayland.cpp b/main_wayland.cpp
index 73396df1f3..13de72373a 100644
--- a/main_wayland.cpp
+++ b/main_wayland.cpp
@@ -84,7 +84,7 @@ ApplicationWayland::~ApplicationWayland()
         return;
     }
 
-    waylandServer()->backend()->setOutputsEnabled(false);
+    kwinApp()->platform()->setOutputsEnabled(false);
     destroyWorkspace();
     waylandServer()->dispatch();
     // need to unload all effects prior to destroying X connection as they might do X calls
@@ -130,7 +130,7 @@ void ApplicationWayland::setupCrashHandler()
 
 void ApplicationWayland::createBackend()
 {
-    AbstractBackend *backend = waylandServer()->backend();
+    AbstractBackend *backend = kwinApp()->platform();
     connect(backend, &AbstractBackend::screensQueried, this, &ApplicationWayland::continueStartupWithScreens);
     connect(backend, &AbstractBackend::initFailed, this,
         [] () {
@@ -143,7 +143,7 @@ void ApplicationWayland::createBackend()
 
 void ApplicationWayland::continueStartupWithScreens()
 {
-    disconnect(waylandServer()->backend(), &AbstractBackend::screensQueried, this, &ApplicationWayland::continueStartupWithScreens);
+    disconnect(kwinApp()->platform(), &AbstractBackend::screensQueried, this, &ApplicationWayland::continueStartupWithScreens);
     createScreens();
     waylandServer()->initOutputs();
 
@@ -699,12 +699,12 @@ int main(int argc, char * argv[])
         return 1;
     }
     if (!deviceIdentifier.isEmpty()) {
-        server->backend()->setDeviceIdentifier(deviceIdentifier);
+        a.platform()->setDeviceIdentifier(deviceIdentifier);
     }
     if (initialWindowSize.isValid()) {
-        server->backend()->setInitialWindowSize(initialWindowSize);
+        a.platform()->setInitialWindowSize(initialWindowSize);
     }
-    server->backend()->setInitialOutputCount(outputCount);
+    a.platform()->setInitialOutputCount(outputCount);
 
     QObject::connect(&a, &KWin::Application::workspaceCreated, server, &KWin::WaylandServer::initWorkspace);
     environment.insert(QStringLiteral("WAYLAND_DISPLAY"), server->display()->socketName());
diff --git a/plugins/qpa/integration.cpp b/plugins/qpa/integration.cpp
index 589d3e5a8b..6aef09e0f7 100644
--- a/plugins/qpa/integration.cpp
+++ b/plugins/qpa/integration.cpp
@@ -145,7 +145,7 @@ QPlatformNativeInterface *Integration::nativeInterface() const
 
 QPlatformOpenGLContext *Integration::createPlatformOpenGLContext(QOpenGLContext *context) const
 {
-    if (waylandServer()->backend()->supportsQpaContext()) {
+    if (kwinApp()->platform()->supportsQpaContext()) {
         return new SharingPlatformContext(context, const_cast<Integration*>(this));
     }
     if (m_eglDisplay == EGL_NO_DISPLAY) {
diff --git a/plugins/qpa/sharingplatformcontext.cpp b/plugins/qpa/sharingplatformcontext.cpp
index 45314999a8..113852ea0e 100644
--- a/plugins/qpa/sharingplatformcontext.cpp
+++ b/plugins/qpa/sharingplatformcontext.cpp
@@ -33,7 +33,7 @@ namespace QPA
 {
 
 SharingPlatformContext::SharingPlatformContext(QOpenGLContext *context, Integration *integration)
-    : AbstractPlatformContext(context, integration, waylandServer()->backend()->sceneEglDisplay())
+    : AbstractPlatformContext(context, integration, kwinApp()->platform()->sceneEglDisplay())
 {
     create();
 }
@@ -85,7 +85,7 @@ void SharingPlatformContext::create()
     if (!bindApi()) {
         return;
     }
-    createContext(waylandServer()->backend()->sceneEglContext());
+    createContext(kwinApp()->platform()->sceneEglContext());
 }
 
 }
diff --git a/pointer_input.cpp b/pointer_input.cpp
index 5a91a7ce60..c9acb9ad9e 100644
--- a/pointer_input.cpp
+++ b/pointer_input.cpp
@@ -122,7 +122,7 @@ void PointerInputRedirection::init()
     Q_ASSERT(!m_inited);
     m_cursor = new CursorImage(this);
     m_inited = true;
-    connect(m_cursor, &CursorImage::changed, waylandServer()->backend(), &AbstractBackend::cursorChanged);
+    connect(m_cursor, &CursorImage::changed, kwinApp()->platform(), &AbstractBackend::cursorChanged);
     emit m_cursor->changed();
     connect(workspace(), &Workspace::stackingOrderChanged, this, &PointerInputRedirection::update);
     connect(screens(), &Screens::changed, this, &PointerInputRedirection::updateAfterScreenChange);
@@ -437,7 +437,7 @@ void PointerInputRedirection::updateButton(uint32_t button, InputRedirection::Po
 void PointerInputRedirection::warp(const QPointF &pos)
 {
     if (supportsWarping()) {
-        waylandServer()->backend()->warpPointer(pos);
+        kwinApp()->platform()->warpPointer(pos);
         processMotion(pos, waylandServer()->seat()->timestamp());
     }
 }
@@ -450,7 +450,7 @@ bool PointerInputRedirection::supportsWarping() const
     if (m_supportsWarping) {
         return true;
     }
-    if (waylandServer()->backend()->supportsPointerWarping()) {
+    if (kwinApp()->platform()->supportsPointerWarping()) {
         return true;
     }
     return false;
diff --git a/scene_opengl.cpp b/scene_opengl.cpp
index 0ef83c3746..6472d12313 100644
--- a/scene_opengl.cpp
+++ b/scene_opengl.cpp
@@ -572,7 +572,7 @@ SceneOpenGL *SceneOpenGL::createScene(QObject *parent)
         break;
     case EglPlatformInterface:
         if (kwinApp()->shouldUseWaylandForCompositing()) {
-            backend = waylandServer()->backend()->createOpenGLBackend();
+            backend = kwinApp()->platform()->createOpenGLBackend();
         } else {
             backend = new EglOnXBackend();
         }
diff --git a/scene_qpainter.cpp b/scene_qpainter.cpp
index b8fed3abd3..9bcf673be3 100644
--- a/scene_qpainter.cpp
+++ b/scene_qpainter.cpp
@@ -96,7 +96,7 @@ SceneQPainter *SceneQPainter::createScene(QObject *parent)
 {
     QScopedPointer<QPainterBackend> backend;
     if (kwinApp()->shouldUseWaylandForCompositing()) {
-        backend.reset(waylandServer()->backend()->createQPainterBackend());
+        backend.reset(kwinApp()->platform()->createQPainterBackend());
         if (backend.isNull()) {
             return nullptr;
         }
diff --git a/screens.cpp b/screens.cpp
index 72e32ed2fe..b4d6a46bf5 100644
--- a/screens.cpp
+++ b/screens.cpp
@@ -43,7 +43,7 @@ Screens *Screens::create(QObject *parent)
     s_self = new MockScreens(parent);
 #else
     if (kwinApp()->shouldUseWaylandForCompositing()) {
-        s_self = waylandServer()->backend()->createScreens(parent);
+        s_self = kwinApp()->platform()->createScreens(parent);
     }
     if (kwinApp()->operationMode() == Application::OperationModeX11) {
         s_self = new XRandRScreens(parent);