MythPainterWindow: Set the Wayland opaque region on each resizeEvent

- this should *help* with Wayland opacity issues but is not a complete
cure. Best case scenario; it also improves performance (as the
compositor knows it only needs to render the MythTV main window and
nothing else)

Refs #210 #216 #218

mythtv/libs/libmythui/mythpainterwindow.cpp

@@ -15,6 +15,11 @@
 #include "vulkan/mythpaintervulkan.h"
 #endif
 
+#ifdef USING_WAYLANDEXTRAS
+#include <QGuiApplication>
+#include "platforms/mythwaylandextras.h"
+#endif
+
 #define MYTH_PAINTER_QT QString("Qt")
 
 using TryPainter = bool(*)(MythMainWindow*, MythPainterWindow*&, MythPainter*&, bool&);
@@ -132,6 +137,17 @@ void MythPainterWindow::DestroyPainters(MythPainterWindow *&PaintWin, MythPainte
 MythPainterWindow::MythPainterWindow(MythMainWindow *MainWin)
   : QWidget(MainWin)
 {
+#ifdef USING_WAYLANDEXTRAS
+    if (qGuiApp->platformName().toLower().contains("wayland"))
+        m_waylandDev = new MythWaylandDevice(MainWin);
+#endif
+}
+
+MythPainterWindow::~MythPainterWindow()
+{
+#ifdef USING_WAYLANDEXTRAS
+    delete m_waylandDev;
+#endif
 }
 
 MythRender* MythPainterWindow::GetRenderDevice()
@@ -143,3 +159,12 @@ bool MythPainterWindow::RenderIsShared()
 {
     return m_render && m_render->IsShared();
 }
+
+void MythPainterWindow::resizeEvent(QResizeEvent* /*ResizeEvent*/)
+{
+#ifdef USING_WAYLANDEXTRAS
+    if (m_waylandDev)
+        m_waylandDev->SetOpaqueRegion(rect());
+#endif
+}
+

mythtv/libs/libmythui/mythpainterwindow.h

@@ -8,11 +8,17 @@
 #include "mythuiexp.h"
 #include "mythrender_base.h"
 
+#ifdef USING_WAYLANDEXTRAS
+class MythWaylandDevice;
+#endif
+
 class MythMainWindow;
 class MythPainter;
 
 class MythPainterWindow : public QWidget
 {
+    Q_OBJECT
+
   public:
     static MUI_PUBLIC QString GetDefaultPainter();
     static MUI_PUBLIC QStringList GetPainters();
@@ -24,15 +30,19 @@ class MythPainterWindow : public QWidget
 
     MythRender* GetRenderDevice();
     bool        RenderIsShared ();
+    void        resizeEvent    (QResizeEvent* /*ResizeEvent*/) override;
 
   protected:
     explicit MythPainterWindow(MythMainWindow* MainWin);
-   ~MythPainterWindow() override = default;
+   ~MythPainterWindow() override;
 
     MythRender* m_render { nullptr };
 
   private:
     Q_DISABLE_COPY(MythPainterWindow)
+#ifdef USING_WAYLANDEXTRAS
+    MythWaylandDevice* m_waylandDev { nullptr };
+#endif
 };
 
-#endif // MYTHPAINTERWINDOW_H
+#endif

mythtv/libs/libmythui/vulkan/mythpainterwindowvulkan.cpp

@@ -89,4 +89,5 @@ void MythPainterWindowVulkan::resizeEvent(QResizeEvent* ResizeEvent)
 {
     if (m_wrapper)
         m_wrapper->resize(ResizeEvent->size());
+    MythPainterWindow::resizeEvent(ResizeEvent);
 }