Merge remote-tracking branch 'origin/5.6.0' into 5.6

Change-Id: I0b190005377a23a91da3563428e223b8a3b18333

2 files changed, 9 insertions, 4 deletions

diff --git a/src/plugins/platforms/eglfs/qeglfsintegration.cpp b/src/plugins/platforms/eglfs/qeglfsintegration.cpp
index 2086ce56e2..35b27cba0b 100644
--- a/src/plugins/platforms/eglfs/qeglfsintegration.cpp
+++ b/src/plugins/platforms/eglfs/qeglfsintegration.cpp
@@ -188,11 +188,8 @@ QPlatformWindow *QEglFSIntegration::createPlatformWindow(QWindow *window) const
 
 QPlatformOpenGLContext *QEglFSIntegration::createPlatformOpenGLContext(QOpenGLContext *context) const
 {
-    // If there is a "root" window into which raster and QOpenGLWidget content is
-    // composited, all other contexts must share with its context.
-    QOpenGLContext *compositingContext = QOpenGLCompositor::instance()->context();
     EGLDisplay dpy = context->screen() ? static_cast<QEglFSScreen *>(context->screen()->handle())->display() : display();
-    QPlatformOpenGLContext *share = compositingContext ? compositingContext->handle() : context->shareHandle();
+    QPlatformOpenGLContext *share = context->shareHandle();
     QVariant nativeHandle = context->nativeHandle();
 
     QEglFSContext *ctx;
diff --git a/src/plugins/platforms/eglfs/qeglfswindow.cpp b/src/plugins/platforms/eglfs/qeglfswindow.cpp
index 8301be8c17..84856831c3 100644
--- a/src/plugins/platforms/eglfs/qeglfswindow.cpp
+++ b/src/plugins/platforms/eglfs/qeglfswindow.cpp
@@ -138,6 +138,14 @@ void QEglFSWindow::create()
         if (!context->create())
             qFatal("EGLFS: Failed to create compositing context");
         compositor->setTarget(context, window());
+        // If there is a "root" window into which raster and QOpenGLWidget content is
+        // composited, all other contexts must share with its context.
+        if (!qt_gl_global_share_context()) {
+            qt_gl_set_global_share_context(context);
+            // What we set up here is in effect equivalent to the application setting
+            // AA_ShareOpenGLContexts. Set the attribute to be fully consistent.
+            QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts);
+        }
     }
 }