Add platform native interface to offscreen plugin

Adds trival support for querying "display" and "glxconfig" in case
offscreen plugin is compiled with xlib support.

This is required so this plugin could work with webengine.

Taks-number: QTBUG-63346
Change-Id: Ie0f29385cb44429ddf383ad459e0c9f3263ccffe
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

1 files changed, 8 insertions, 1 deletions

diff --git a/src/plugins/platforms/offscreen/qoffscreenintegration_x11.h b/src/plugins/platforms/offscreen/qoffscreenintegration_x11.h
index 5e1c6b799b..a1986fdc94 100644
--- a/src/plugins/platforms/offscreen/qoffscreenintegration_x11.h
+++ b/src/plugins/platforms/offscreen/qoffscreenintegration_x11.h
@@ -52,12 +52,19 @@ QT_BEGIN_NAMESPACE
 class QOffscreenX11Connection;
 class QOffscreenX11Info;
 
-class QOffscreenX11Integration : public QOffscreenIntegration
+class QOffscreenX11Integration : public QOffscreenIntegration,  public QPlatformNativeInterface
 {
 public:
     bool hasCapability(QPlatformIntegration::Capability cap) const override;
 
     QPlatformOpenGLContext *createPlatformOpenGLContext(QOpenGLContext *context) const override;
+    QPlatformNativeInterface *nativeInterface()const override;
+
+    // QPlatformNativeInterface
+    void *nativeResourceForScreen(const QByteArray &resource, QScreen *screen) override;
+#ifndef QT_NO_OPENGL
+    void *nativeResourceForContext(const QByteArray &resource, QOpenGLContext *context) override;
+#endif
 
 private:
     mutable QScopedPointer<QOffscreenX11Connection> m_connection;