Disable debug output by default for Qt3D

It is possible to override this, e.g. if you need more debug logging,
by specifying a categorised logging file by means of the QT_LOGGING_CONF
environment variable. For example to enable debug logging on a bunch
of categories create a text file containing the following:

[Rules]
Qt3D.Core.Nodes.debug=true
Qt3D.Core.Aspects.debug=true
Qt3D.Core.Resources.debug=true
Qt3D.Core.ChangeArbiter.debug=true
Qt3D.Render.Backend.debug=true
Qt3D.Render.Frontend=.debug=true
Qt3D.Render.IO.debug=true
Qt3D.Render.Jobs.debug=true
Qt3D.Render.Framegraph.debug=true
Qt3D.Render.RenderNodes.debug=true
Qt3D.Render.Rendering.debug=true
Qt3D.Render.Memory.debug=true

And then set this as the active rules by pointing QT_LOGGING_CONF at
the file. You can verify where the logging rules are coming from by
defining the QT_LOGGING_DEBUG environment variable.

Change-Id: Iad3824c6db0b7f22c417b06734204c666a2ee8dd
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/core/aspects/qaspectengine.cpp b/src/core/aspects/qaspectengine.cpp
index 38d7d6deb..dea6987f3 100644
--- a/src/core/aspects/qaspectengine.cpp
+++ b/src/core/aspects/qaspectengine.cpp
@@ -76,6 +76,10 @@ QAspectEnginePrivate::QAspectEnginePrivate(QAspectEngine *qq)
 QAspectEngine::QAspectEngine(QObject *parent)
     : QObject(*new QAspectEnginePrivate(this), parent)
 {
+    // Don't show any debug output from Qt3D. If you need to enable additional logging
+    // for debugging use a rules file as explained in the QLoggingCategory documentation.
+    QLoggingCategory::setFilterRules(QString::fromUtf8("Qt3D.*.debug=false\n"));
+
     qCDebug(Aspects) << Q_FUNC_INFO;
     Q_D(QAspectEngine);
     d->m_aspectThread = new QAspectThread(this);