Implement fractional_scale_v1 and wp_viewport

This allows compositors to hint a non-integer scale to use on a window
which we can hook to Qt's existing fractional scaling support.

The viewport is used to communicate the relationship between buffer size
and logical size to the compositor. It is a non-integer alternative to
wl_buffer_scale

Change-Id: I1a850f1bcd40e8d04e241e18a538b11f18bc671c
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: David Edmundson <davidedmundson@kde.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/client/qwaylanddisplay_p.h b/src/client/qwaylanddisplay_p.h
index 473016f1e..640f33b8e 100644
--- a/src/client/qwaylanddisplay_p.h
+++ b/src/client/qwaylanddisplay_p.h
@@ -36,6 +36,7 @@
 #endif
 
 struct wl_cursor_image;
+struct wp_viewport;
 
 QT_BEGIN_NAMESPACE
 
@@ -50,6 +51,8 @@ namespace QtWayland {
     class zwp_text_input_manager_v2;
     class zwp_text_input_manager_v4;
     class qt_text_input_method_manager_v1;
+    class wp_viewporter;
+    class wp_fractional_scale_manager_v1;
 }
 
 namespace QtWaylandClient {
@@ -110,6 +113,7 @@ public:
     struct wl_surface *createSurface(void *handle);
     struct ::wl_region *createRegion(const QRegion &qregion);
     struct ::wl_subsurface *createSubSurface(QWaylandWindow *window, QWaylandWindow *parent);
+    struct ::wp_viewport *createViewport(QWaylandWindow *window);
 
     QWaylandShellIntegration *shellIntegration() const;
     QWaylandClientBufferIntegration *clientBufferIntegration() const;
@@ -146,6 +150,8 @@ public:
     QtWayland::zwp_text_input_manager_v4 *textInputManagerv4() const { return mTextInputManagerv4.data(); }
     QWaylandHardwareIntegration *hardwareIntegration() const { return mHardwareIntegration.data(); }
     QWaylandXdgOutputManagerV1 *xdgOutputManager() const { return mXdgOutputManager.data(); }
+    QtWayland::wp_fractional_scale_manager_v1 *fractionalScaleManager() const { return mFractionalScaleManager.data(); }
+    QtWayland::wp_viewporter *viewporter() const { return mViewporter.data(); }
 
     struct RegistryGlobal {
         uint32_t id;
@@ -265,6 +271,8 @@ private:
     QScopedPointer<QtWayland::zwp_text_input_manager_v4> mTextInputManagerv4;
     QScopedPointer<QWaylandHardwareIntegration> mHardwareIntegration;
     QScopedPointer<QWaylandXdgOutputManagerV1> mXdgOutputManager;
+    QScopedPointer<QtWayland::wp_viewporter> mViewporter;
+    QScopedPointer<QtWayland::wp_fractional_scale_manager_v1> mFractionalScaleManager;
     int mFd = -1;
     int mWritableNotificationFd = -1;
     QList<RegistryGlobal> mGlobals;