Remove Platform::areOutputsEnabled()

This flag is redundant. If an output is disabled, the compositor won't
attempt to perform compositing on it.

autotests/integration/kwin_wayland_test.cpp

@@ -74,7 +74,6 @@ WaylandTestApplication::WaylandTestApplication(OperationMode mode, int &argc, ch
 WaylandTestApplication::~WaylandTestApplication()
 {
     setTerminating();
-    kwinApp()->platform()->setOutputsEnabled(false);
     // need to unload all effects prior to destroying X connection as they might do X calls
     // also before destroy Workspace, as effects might call into Workspace
     if (effects) {

src/composite.cpp

@@ -586,11 +586,7 @@ void Compositor::addRepaintFull()
 
 void Compositor::handleFrameRequested(RenderLoop *renderLoop)
 {
-    // If outputs are disabled, we return to the event loop and
-    // continue processing events until the outputs are enabled again
-    if (kwinApp()->platform()->areOutputsEnabled()) {
     composite(renderLoop);
-    }
 }
 
 void Compositor::composite(RenderLoop *renderLoop)

src/platform.h

@@ -344,12 +344,6 @@ public:
     bool supportsPointerWarping() const {
         return m_pointerWarping;
     }
-    bool areOutputsEnabled() const {
-        return m_outputsEnabled;
-    }
-    void setOutputsEnabled(bool enabled) {
-        m_outputsEnabled = enabled;
-    }
     int initialOutputCount() const {
         return m_initialOutputCount;
     }
@@ -583,7 +577,6 @@ private:
     QSize m_initialWindowSize;
     QByteArray m_deviceIdentifier;
     bool m_pointerWarping = false;
-    bool m_outputsEnabled = true;
     int m_initialOutputCount = 1;
     qreal m_initialOutputScale = 1;
     EGLDisplay m_eglDisplay;

src/plugins/platforms/drm/drm_backend.cpp

@@ -312,7 +312,6 @@ bool DrmBackend::updateOutputs()
     if (oldOutputs != m_outputs) {
         readOutputsConfiguration();
     }
-    updateOutputsEnabled();
     if (!m_outputs.isEmpty()) {
         emit screensQueried();
     }
@@ -443,7 +442,6 @@ void DrmBackend::enableOutput(DrmOutput *output, bool enable)
         emit output->gpu()->outputDisabled(output);
         emit outputDisabled(output);
     }
-    updateOutputsEnabled();
     checkOutputsAreOn();
     emit screensQueried();
 }
@@ -582,15 +580,6 @@ OpenGLBackend *DrmBackend::createOpenGLBackend()
 #endif
 }
 
-void DrmBackend::updateOutputsEnabled()
-{
-    bool enabled = false;
-    for (auto it = m_enabledOutputs.constBegin(); it != m_enabledOutputs.constEnd(); ++it) {
-        enabled = enabled || (*it)->isDpmsEnabled();
-    }
-    setOutputsEnabled(enabled);
-}
-
 QVector<CompositingType> DrmBackend::supportedCompositors() const
 {
     if (selectedCompositor() != NoCompositing) {

src/plugins/platforms/drm/drm_backend.h

@@ -91,7 +91,6 @@ private:
     void readOutputsConfiguration();
     void writeOutputsConfiguration();
     QString generateOutputConfigurationUuid() const;
-    void updateOutputsEnabled();
     void handleUdevEvent();
     DrmGpu *addGpu(std::unique_ptr<UdevDevice> device);