[vlc-devel] [PATCH 2/2] Qt: Wayland vout window provider

[Rémi Denis-Courmont]

Note that this depends on Qt5 private headers.
---
 configure.ac                                    |  2 ++
 modules/gui/qt/Makefile.am                      |  4 +++-
 modules/gui/qt/components/interface_widgets.cpp | 22 ++++++++++++++++++++++
 modules/gui/qt/qt.cpp                           |  2 ++
 4 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 3a30a87f37..f1f604e88e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3761,6 +3761,7 @@ AS_IF([test "${enable_qt}" != "no"], [
       ])
       QT_PATH="$(eval $PKG_CONFIG --variable=exec_prefix Qt5Core)"
       QT_HOST_PATH="$(eval $PKG_CONFIG --variable=host_bins Qt5Core)"
+      QT_VERSION="$(eval $PKG_CONFIG --modversion Qt5Gui)"
       AC_PATH_PROGS(MOC, [moc-qt5 moc], moc, ["${QT_HOST_PATH}" "${QT_PATH}/bin"])
       AC_PATH_PROGS(RCC, [rcc-qt5 rcc], rcc, ["${QT_HOST_PATH}" "${QT_PATH}/bin"])
       AC_PATH_PROGS(UIC, [uic-qt5 uic], uic, ["${QT_HOST_PATH}" "${QT_PATH}/bin"])
@@ -3783,6 +3784,7 @@ AS_IF([test "${enable_qt}" != "no"], [
   VLC_ADD_PLUGIN([qt])
   ALIASES="${ALIASES} qvlc"
 ])
+AC_SUBST(QT_VERSION)
 AM_CONDITIONAL(ENABLE_QT, [test "$enable_qt" != "no"])
 AM_CONDITIONAL([HAVE_QT5_X11], [test "${have_qt5_x11}" = "yes"])
 
diff --git a/modules/gui/qt/Makefile.am b/modules/gui/qt/Makefile.am
index dfe9c387a5..4e166d2561 100644
--- a/modules/gui/qt/Makefile.am
+++ b/modules/gui/qt/Makefile.am
@@ -26,7 +26,9 @@ libqt_plugin_la_CXXFLAGS += $(QT5_X11_CFLAGS) -DQT5_HAS_X11
 libqt_plugin_la_LIBADD += $(QT5_X11_LIBS) $(X_LIBS) $(X_PRE_LIB) -lX11
 endif
 if HAVE_WAYLAND
-libqt_plugin_la_CXXFLAGS += $(WAYLAND_CLIENT_CFLAGS) -DQT5_HAS_WAYLAND
+libqt_plugin_la_CPPFLAGS += -DQT5_HAS_WAYLAND \
+	-DQPNI_HEADER=\<$(QT_VERSION)/QtGui/qpa/qplatformnativeinterface.h\>
+libqt_plugin_la_CXXFLAGS += $(WAYLAND_CLIENT_CFLAGS)
 libqt_plugin_la_LIBADD += $(WAYLAND_CLIENT_LIBS)
 endif
 if HAVE_WIN32
diff --git a/modules/gui/qt/components/interface_widgets.cpp b/modules/gui/qt/components/interface_widgets.cpp
index 5226addb72..6a5853b1b3 100644
--- a/modules/gui/qt/components/interface_widgets.cpp
+++ b/modules/gui/qt/components/interface_widgets.cpp
@@ -54,6 +54,10 @@
 # include <X11/Xlib.h>
 # include <QX11Info>
 #endif
+#ifdef QT5_HAS_WAYLAND
+# include QPNI_HEADER
+# include <QWindow>
+#endif
 
 #include <math.h>
 #include <assert.h>
@@ -148,6 +152,24 @@ bool VideoWidget::request( struct vout_window_t *p_wnd )
         case VOUT_WINDOW_TYPE_NSOBJECT:
             p_wnd->handle.nsobject = (void *)stable->winId();
             break;
+#ifdef QT5_HAS_WAYLAND
+        case VOUT_WINDOW_TYPE_WAYLAND:
+        {
+            QWindow *window = stable->windowHandle();
+            assert(window != NULL);
+            window->create();
+
+            QPlatformNativeInterface *qni = qApp->platformNativeInterface();
+            assert(qni != NULL);
+
+            p_wnd->handle.wl = reinterpret_cast<wl_surface*>(
+                qni->nativeResourceForWindow(QByteArrayLiteral("surface"),
+                                             window));
+            p_wnd->display.wl = reinterpret_cast<wl_display*>(
+                qni->nativeResourceForIntegration(QByteArrayLiteral("wl_display")));
+            break;
+        }
+#endif
         default:
             vlc_assert_unreachable();
     }
diff --git a/modules/gui/qt/qt.cpp b/modules/gui/qt/qt.cpp
index b86b7e507f..4e0bbc8615 100644
--- a/modules/gui/qt/qt.cpp
+++ b/modules/gui/qt/qt.cpp
@@ -605,6 +605,8 @@ static void *ThreadPlatform( void *obj, char *platform_name )
         QString platform = app.platformName();
         if( platform == qfu("xcb") )
             p_sys->voutWindowType = VOUT_WINDOW_TYPE_XID;
+        else if( platform == qfu("wayland") )
+            p_sys->voutWindowType = VOUT_WINDOW_TYPE_WAYLAND;
         else if( platform == qfu("windows") )
             p_sys->voutWindowType = VOUT_WINDOW_TYPE_HWND;
         else if( platform == qfu("cocoa" ) )
-- 
2.11.0