QRenderAspect: look for opengl renderer by default

Since rhi render plugin is not built by default, ensure
we look for the OpenGL backend if QT3D_RENDERER is not set.

Tests might fail otherwise.

Change-Id: I3bc268df9e29fb8fa28d0f424e56535db7bc9c57
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>
(cherry picked from commit d3104c6bfc6cb3dc30d631e5b1bf6fd9ba23b1e9)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/render/frontend/qrenderaspect.cpp b/src/render/frontend/qrenderaspect.cpp
index 609ba433a..e742b1555 100644
--- a/src/render/frontend/qrenderaspect.cpp
+++ b/src/render/frontend/qrenderaspect.cpp
@@ -933,7 +933,7 @@ Render::AbstractRenderer *QRenderAspectPrivate::loadRendererPlugin()
     // plugin would best be loaded
 
     const QByteArray envTarget = qgetenv("QT3D_RENDERER");
-    const QString targetKey = !envTarget.isEmpty() ? QString::fromLatin1(envTarget) : QStringLiteral("rhi");
+    const QString targetKey = !envTarget.isEmpty() ? QString::fromLatin1(envTarget) : QStringLiteral("opengl");
     const QStringList keys = Render::QRendererPluginFactory::keys();
     for (const QString &key : keys) {
         if (key != targetKey)