Remove unused mask param in QPainterBackend::endFrame()

It is unused and it is not a good idea to pass Scene's mask to the
render backend as it results in higher coupling between Platform and
Scene.

src/platformsupport/scenes/qpainter/qpainterbackend.h

@@ -29,7 +29,7 @@ public:
     PlatformSurfaceTexture *createPlatformSurfaceTextureInternal(SurfacePixmapInternal *pixmap);
     PlatformSurfaceTexture *createPlatformSurfaceTextureWayland(SurfacePixmapWayland *pixmap);
 
-    virtual void endFrame(int screenId, int mask, const QRegion &damage) = 0;
+    virtual void endFrame(int screenId, const QRegion &damage) = 0;
     virtual void beginFrame(int screenId) = 0;
     /**
      * @brief React on screen geometry changes.

src/plugins/platforms/drm/scene_qpainter_drm_backend.cpp

@@ -78,9 +78,8 @@ void DrmQPainterBackend::beginFrame(int screenId)
     m_outputs[screenId].swapchain->acquireBuffer();
 }
 
-void DrmQPainterBackend::endFrame(int screenId, int mask, const QRegion &damage)
+void DrmQPainterBackend::endFrame(int screenId, const QRegion &damage)
 {
-    Q_UNUSED(mask)
     Q_UNUSED(damage)
 
     const Output &rendererOutput = m_outputs[screenId];

src/plugins/platforms/drm/scene_qpainter_drm_backend.h

@@ -33,7 +33,7 @@ public:
     QImage *bufferForScreen(int screenId) override;
     bool needsFullRepaint(int screenId) const override;
     void beginFrame(int screenId) override;
-    void endFrame(int screenId, int mask, const QRegion &damage) override;
+    void endFrame(int screenId, const QRegion &damage) override;
 
 private:
     void initOutput(DrmOutput *output);

src/plugins/platforms/fbdev/scene_qpainter_fb_backend.cpp

@@ -82,10 +82,9 @@ void FramebufferQPainterBackend::beginFrame(int screenId)
     m_needsFullRepaint = true;
 }
 
-void FramebufferQPainterBackend::endFrame(int screenId, int mask, const QRegion &damage)
+void FramebufferQPainterBackend::endFrame(int screenId, const QRegion &damage)
 {
     Q_UNUSED(screenId)
-    Q_UNUSED(mask)
     Q_UNUSED(damage)
 
     if (!kwinApp()->platform()->session()->isActive()) {

src/plugins/platforms/fbdev/scene_qpainter_fb_backend.h

@@ -27,7 +27,7 @@ public:
     QImage *bufferForScreen(int screenId) override;
     bool needsFullRepaint(int screenId) const override;
     void beginFrame(int screenId) override;
-    void endFrame(int screenId, int mask, const QRegion &damage) override;
+    void endFrame(int screenId, const QRegion &damage) override;
 
 private:
     void reactivate();

src/plugins/platforms/virtual/scene_qpainter_virtual_backend.cpp

@@ -53,9 +53,8 @@ void VirtualQPainterBackend::createOutputs()
     }
 }
 
-void VirtualQPainterBackend::endFrame(int screenId, int mask, const QRegion &damage)
+void VirtualQPainterBackend::endFrame(int screenId, const QRegion &damage)
 {
-    Q_UNUSED(mask)
     Q_UNUSED(damage)
 
     VirtualOutput *output = static_cast<VirtualOutput *>(m_backend->findOutput(screenId));

src/plugins/platforms/virtual/scene_qpainter_virtual_backend.h

@@ -29,7 +29,7 @@ public:
     QImage *bufferForScreen(int screenId) override;
     bool needsFullRepaint(int screenId) const override;
     void beginFrame(int screenId) override;
-    void endFrame(int screenId, int mask, const QRegion &damage) override;
+    void endFrame(int screenId, const QRegion &damage) override;
 
 private:
     void createOutputs();

src/plugins/platforms/wayland/scene_qpainter_wayland_backend.cpp

@@ -166,10 +166,8 @@ void WaylandQPainterBackend::createOutput(AbstractOutput *waylandOutput)
     m_outputs << output;
 }
 
-void WaylandQPainterBackend::endFrame(int screenId, int mask, const QRegion &damage)
+void WaylandQPainterBackend::endFrame(int screenId, const QRegion &damage)
 {
-    Q_UNUSED(mask)
-
     WaylandQPainterOutput *rendererOutput = m_outputs.value(screenId);
     Q_ASSERT(rendererOutput);
 

src/plugins/platforms/wayland/scene_qpainter_wayland_backend.h

@@ -73,7 +73,7 @@ public:
 
     QImage *bufferForScreen(int screenId) override;
 
-    void endFrame(int screenId, int mask, const QRegion& damage) override;
+    void endFrame(int screenId, const QRegion& damage) override;
     void beginFrame(int screenId) override;
 
     bool needsFullRepaint(int screenId) const override;

src/plugins/platforms/x11/windowed/scene_qpainter_x11_backend.cpp

@@ -61,9 +61,8 @@ void X11WindowedQPainterBackend::beginFrame(int screenId)
     Q_UNUSED(screenId)
 }
 
-void X11WindowedQPainterBackend::endFrame(int screenId, int mask, const QRegion &damage)
+void X11WindowedQPainterBackend::endFrame(int screenId, const QRegion &damage)
 {
-    Q_UNUSED(mask)
     Q_UNUSED(damage)
 
     X11WindowedOutput *output = static_cast<X11WindowedOutput *>(kwinApp()->platform()->findOutput(screenId));

src/plugins/platforms/x11/windowed/scene_qpainter_x11_backend.h

@@ -32,7 +32,7 @@ public:
     QImage *bufferForScreen(int screenId) override;
     bool needsFullRepaint(int screenId) const override;
     void beginFrame(int screenId) override;
-    void endFrame(int screenId, int mask, const QRegion &damage) override;
+    void endFrame(int screenId, const QRegion &damage) override;
 
 private:
     void createOutputs();

src/plugins/scenes/qpainter/scene_qpainter.cpp

@@ -110,7 +110,7 @@ void SceneQPainter::paint(int screenId, const QRegion &_damage, const QList<Topl
 
         m_painter->end();
         renderLoop->endFrame();
-        m_backend->endFrame(screenId, mask, updateRegion);
+        m_backend->endFrame(screenId, updateRegion);
     }
 
     // do cleanup