4 files changed, 36 insertions, 0 deletions
diff --git a/examples/opengl/contextinfo/contextinfo.pro b/examples/opengl/contextinfo/contextinfo.pro
index ddaa084f38..2836e5ea5a 100644
--- a/examples/opengl/contextinfo/contextinfo.pro
+++ b/examples/opengl/contextinfo/contextinfo.pro
@@ -7,3 +7,7 @@ SOURCES += main.cpp \
 
 HEADERS += widget.h \
            renderwindow.h
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/opengl/contextinfo
+INSTALLS += target
diff --git a/examples/opengl/contextinfo/main.cpp b/examples/opengl/contextinfo/main.cpp
index f8bca02527..88ab4a7334 100644
--- a/examples/opengl/contextinfo/main.cpp
+++ b/examples/opengl/contextinfo/main.cpp
@@ -53,6 +53,15 @@
 
 int main(int argc, char **argv)
 {
+    for (int i = 1; i < argc; ++i) {
+        if (!qstrcmp(argv[i], "-g"))
+            QCoreApplication::setAttribute(Qt::AA_UseOpenGLES);
+        else if (!qstrcmp(argv[i], "-s"))
+            QCoreApplication::setAttribute(Qt::AA_UseSoftwareOpenGL);
+        else if (!qstrcmp(argv[i], "-d"))
+            QCoreApplication::setAttribute(Qt::AA_UseDesktopOpenGL);
+    }
+
     QApplication app(argc, argv);
 
     Widget w;
diff --git a/examples/opengl/contextinfo/widget.cpp b/examples/opengl/contextinfo/widget.cpp
index a3bda7b420..fc21983f38 100644
--- a/examples/opengl/contextinfo/widget.cpp
+++ b/examples/opengl/contextinfo/widget.cpp
@@ -60,10 +60,12 @@
 #include <QPushButton>
 #include <QTextEdit>
 #include <QSplitter>
+#include <QGuiApplication>
 #include <QSurfaceFormat>
 #include <QOpenGLContext>
 #include <QOpenGLFunctions>
 #include <QDebug>
+#include <QTextStream>
 
 struct Version {
     const char *str;
@@ -235,6 +237,24 @@ Widget::Widget(QWidget *parent)
     m_renderWindowContainer = new QWidget;
     addRenderWindow();
 
+    QString description;
+    QTextStream str(&description);
+    str << "Qt " << QT_VERSION_STR << ' ' << QGuiApplication::platformName();
+    const char *openGlVariables[] =
+        {"QT_ANGLE_PLATFORM", "QT_OPENGL", "QT_OPENGL_BUGLIST", "QT_OPENGL_DLL"};
+    const size_t variableCount = sizeof(openGlVariables) / sizeof(openGlVariables[0]);
+    for (size_t v = 0; v < variableCount; ++v) {
+        if (qEnvironmentVariableIsSet(openGlVariables[v]))
+            str << ' ' << openGlVariables[v] << '=' << qgetenv(openGlVariables[v]);
+    }
+    if (QCoreApplication::testAttribute(Qt::AA_UseOpenGLES))
+        str << " Qt::AA_UseOpenGLES";
+    if (QCoreApplication::testAttribute(Qt::AA_UseSoftwareOpenGL))
+        str << " Qt::AA_UseSoftwareOpenGL";
+    if (QCoreApplication::testAttribute(Qt::AA_UseDesktopOpenGL))
+        str << " Qt::AA_UseSoftwareOpenGL";
+    layout->addWidget(new QLabel(description));
+
     setLayout(layout);
 }
 
diff --git a/examples/opengl/opengl.pro b/examples/opengl/opengl.pro
index ed8134743b..a102e08733 100644
--- a/examples/opengl/opengl.pro
+++ b/examples/opengl/opengl.pro
@@ -16,3 +16,6 @@ qtHaveModule(widgets) {
                 textures \
                 hellogles3
 }
+
+EXAMPLE_FILES += \
+    legacy