Merge remote-tracking branch 'origin/5.6' into 5.7

This also reverts commit 018e670a26ff5a61b949100ae080f5e654e7bee8.

The change was introduced in 5.6. After the refactoring, 14960f52,
in 5.7 branch and a merge, it is not needed any more.

Conflicts:
	.qmake.conf
	src/corelib/io/qstandardpaths_mac.mm
	src/corelib/tools/qsharedpointer_impl.h
	tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp

Change-Id: If4fdff0ebf2b9b5df9f9db93ea0022d5ee3da2a4

2 files changed, 9 insertions, 4 deletions

diff --git a/src/plugins/platforms/eglfs/qeglfsintegration.cpp b/src/plugins/platforms/eglfs/qeglfsintegration.cpp
index 3d3381323c..88b4692c80 100644
--- a/src/plugins/platforms/eglfs/qeglfsintegration.cpp
+++ b/src/plugins/platforms/eglfs/qeglfsintegration.cpp
@@ -200,11 +200,8 @@ 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 c37096160e..2c386e2aea 100644
--- a/src/plugins/platforms/eglfs/qeglfswindow.cpp
+++ b/src/plugins/platforms/eglfs/qeglfswindow.cpp
@@ -142,6 +142,14 @@ void QEglFSWindow::create()
         if (Q_UNLIKELY(!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);
+        }
     }
 }