QmlDesigner: Implement different render path for Qt 6

When building with Qt 6 or if qmlpuppet_unifiedRenderPath is set
in the environment we switch to a different render path.
In this case we use QQuickWindow::grabWindow() and render the root item.
No composition is done in the Qt Creator process anymore.
This is a similar approach we already take for the 3D view.
Performance is acceptable and we fix rendering issues related to
effects and layers.

Change-Id: Ic963eca047e0bf16ca3a099ec94658ae2af0fb63
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

1 files changed, 5 insertions, 0 deletions

diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/servernodeinstance.cpp b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/servernodeinstance.cpp
index 69c854f3e9..511a89b62b 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/servernodeinstance.cpp
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/servernodeinstance.cpp
@@ -120,6 +120,11 @@ QImage ServerNodeInstance::renderPreviewImage(const QSize &previewImageSize) con
     return m_nodeInstance->renderPreviewImage(previewImageSize);
 }
 
+QSharedPointer<QQuickItemGrabResult> ServerNodeInstance::createGrabResult() const
+{
+    return m_nodeInstance->createGrabResult();
+}
+
 bool ServerNodeInstance::isRootNodeInstance() const
 {
     return isValid() && m_nodeInstance->isRootNodeInstance();