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From ffa77919e72951c7accf84ad09dc669d166aedf8 Mon Sep 17 00:00:00 2001
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From: Laszlo Agocs <laszlo.agocs@qt.io>
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Date: Mon, 11 Oct 2021 15:37:33 +0200
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Subject: [PATCH 11/20] Revert "Fix for possible crash in
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QSGDefaultLayer::grab"
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This reverts commit 1c5de027d0c31d1d6697bd0557128d92207763d8.
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The fix here is not correct. Calling a QSGRhiLayer function from the gui
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thread is very wrong and can cause a set of unexpected issues. The
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Address Sanitizer catches this by recognizing that the render thread is
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trying to do something with an object destroyed in the meantime on the
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main thread in the layer->setItem(null) call.
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The issue the original fix is trying to address needs to be addressed in
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some different form.
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Fixes: QTBUG-94975
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Pick-to: 6.2 6.1 5.15
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Change-Id: I46f904026281201fc6d233ed7d3bdc7080934afe
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Reviewed-by: Christian Strømme <christian.stromme@qt.io>
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(cherry picked from commit a5f0361622eb08eab6c3474d5fc249d1962e3d1e)
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---
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src/quick/items/qquickshadereffectsource.cpp | 8 --------
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src/quick/items/qquickshadereffectsource_p.h | 1 -
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2 files changed, 9 deletions(-)
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diff --git a/src/quick/items/qquickshadereffectsource.cpp b/src/quick/items/qquickshadereffectsource.cpp
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index 4f61d61309..b298ed74da 100644
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--- a/src/quick/items/qquickshadereffectsource.cpp
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+++ b/src/quick/items/qquickshadereffectsource.cpp
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@@ -344,7 +344,6 @@ void QQuickShaderEffectSource::setSourceItem(QQuickItem *item)
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d->refFromEffectItem(m_hideSource);
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d->addItemChangeListener(this, QQuickItemPrivate::Geometry);
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connect(m_sourceItem, SIGNAL(destroyed(QObject*)), this, SLOT(sourceItemDestroyed(QObject*)));
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- connect(m_sourceItem, SIGNAL(parentChanged(QQuickItem*)), this, SLOT(sourceItemParentChanged(QQuickItem*)));
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} else {
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qWarning("ShaderEffectSource: sourceItem and ShaderEffectSource must both be children of the same window.");
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m_sourceItem = nullptr;
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@@ -364,13 +363,6 @@ void QQuickShaderEffectSource::sourceItemDestroyed(QObject *item)
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}
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-void QQuickShaderEffectSource::sourceItemParentChanged(QQuickItem *parent)
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-{
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- if (!parent && m_texture)
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- m_texture->setItem(0);
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-}
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-
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-
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/*!
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\qmlproperty rect QtQuick::ShaderEffectSource::sourceRect
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diff --git a/src/quick/items/qquickshadereffectsource_p.h b/src/quick/items/qquickshadereffectsource_p.h
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index 4deb6c70a3..c0a1ccab78 100644
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--- a/src/quick/items/qquickshadereffectsource_p.h
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+++ b/src/quick/items/qquickshadereffectsource_p.h
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@@ -173,7 +173,6 @@ Q_SIGNALS:
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private Q_SLOTS:
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void sourceItemDestroyed(QObject *item);
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void invalidateSceneGraph();
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- void sourceItemParentChanged(QQuickItem *parent);
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protected:
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void releaseResources() override;
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--
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2.35.1
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