Add support for bitmap cursors

So far QtWayland did not support custom bitmap/pixmap QCursors.
This change adds support for them by creating a QWaylandShmBuffer and
copying the pixmap data into that buffer. The internal API to set
cursors images is changed to not only rely on wl_cursor_image, but also
allow to just set the buffer with a specific size and a hot spot.

The created WaylandShmBuffer is passed around as a shared pointer, so
that it can be automatically cleaned up once the cursor image is no
longer used on any seat.

Task-number: QTBUG-51604
Change-Id: I1f1ee87f03186c3d564468d3e8ea2a3141d7e2fb
Reviewed-by: Giulio Camuffo <giulio.camuffo@kdab.com>
Reviewed-by: Johan Helsing <johan.helsing@theqtcompany.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/client/qwaylandcursor_p.h b/src/client/qwaylandcursor_p.h
index 0cc1173f8..9e06cf626 100644
--- a/src/client/qwaylandcursor_p.h
+++ b/src/client/qwaylandcursor_p.h
@@ -57,6 +57,7 @@ QT_BEGIN_NAMESPACE
 
 namespace QtWaylandClient {
 
+class QWaylandBuffer;
 class QWaylandDisplay;
 class QWaylandScreen;
 
@@ -72,6 +73,7 @@ public:
     void setPos(const QPoint &pos);
 
     struct wl_cursor_image *cursorImage(Qt::CursorShape shape);
+    QSharedPointer<QWaylandBuffer> cursorBitmapImage(const QCursor *cursor);
 
 private:
     enum WaylandCursor {