Subsurface implementation, with C++ API

This adds support for subsurfaces to QWaylandCompositor and
QWaylandSurface.

Task-number: QTBUG-49809
Change-Id: I2fa9ee4dcd1f48a2a28dab536f9cd6edc716e42b
Reviewed-by: Giulio Camuffo <giuliocamuffo@gmail.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/compositor/compositor_api/qwaylandsurface_p.h b/src/compositor/compositor_api/qwaylandsurface_p.h
index 1f3676bd9..de71b7fe3 100644
--- a/src/compositor/compositor_api/qwaylandsurface_p.h
+++ b/src/compositor/compositor_api/qwaylandsurface_p.h
@@ -112,6 +112,11 @@ public:
     static void removeUninitializedSurface(QWaylandSurfacePrivate *surface);
     static bool hasUninitializedSurface();
 #endif
+
+    void initSubsurface(QWaylandSurface *parent, struct ::wl_client *client, int id, int version);
+    bool isSubsurface() const { return subsurface; }
+    QWaylandSurfacePrivate *parentSurface() const { return subsurface ? subsurface->parentSurface : nullptr; }
+
 protected:
     void surface_destroy_resource(Resource *resource) Q_DECL_OVERRIDE;
 
@@ -170,6 +175,28 @@ protected: //member variables
     Qt::ScreenOrientation contentOrientation;
     QWindow::Visibility visibility;
 
+    class Subsurface : public QtWaylandServer::wl_subsurface
+    {
+    public:
+        Subsurface(QWaylandSurfacePrivate *s) : surface(s) {}
+        QWaylandSurfacePrivate *surfaceFromResource();
+
+    protected:
+        void subsurface_set_position(wl_subsurface::Resource *resource, int32_t x, int32_t y);
+        void subsurface_place_above(wl_subsurface::Resource *resource, struct wl_resource *sibling);
+        void subsurface_place_below(wl_subsurface::Resource *resource, struct wl_resource *sibling);
+        void subsurface_set_sync(wl_subsurface::Resource *resource);
+        void subsurface_set_desync(wl_subsurface::Resource *resource);
+
+    private:
+        friend class QWaylandSurfacePrivate;
+        QWaylandSurfacePrivate *surface;
+        QWaylandSurfacePrivate *parentSurface;
+        QPoint position;
+    };
+
+    Subsurface *subsurface;
+
 #ifndef QT_NO_DEBUG
     static QList<QWaylandSurfacePrivate *> uninitializedSurfaces;
 #endif