Make editor window use depth prepass

If a layers depth prepass is disabled the selection box will
show on top of the object. Enabling it for the editor only makes it
render with depth.

Task-number: QT3DS-4174
Change-Id: I8c2164ee8a1b23d2bbd528f589e946d7971c4644
Reviewed-by: Tomi Korpipää <tomi.korpipaa@qt.io>
Reviewed-by: Antti Määttä <antti.maatta@qt.io>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/Authoring/Qt3DStudio/Render/StudioRendererTranslation.cpp b/src/Authoring/Qt3DStudio/Render/StudioRendererTranslation.cpp
index b07d01ed..40f47962 100644
--- a/src/Authoring/Qt3DStudio/Render/StudioRendererTranslation.cpp
+++ b/src/Authoring/Qt3DStudio/Render/StudioRendererTranslation.cpp
@@ -2834,6 +2834,13 @@ void STranslation::Render(int inWidgetId, bool inDrawGuides, bool scenePreviewPa
         if (scenePreviewPass) {
             m_Context.GetRenderContext().SetViewport(GetPreviewViewport());
             m_Context.SetSceneColor(Option<QT3DSVec4>());
+
+            SLayer *child = m_Scene->m_FirstChild;
+            do {
+                child->m_Flags.SetLayerEnableDepthPrepass(true);
+                child = (SLayer *)child->m_NextSibling;
+            } while (child);
+
         }
 
         m_Scene->PrepareForRender(m_Context);