Software Adaptation: Don't leak QSGRenderContext resources

Subclasses of QSGRenderContext are responsible for releasing the
resource tracked by the render context on invalidate. I'm not sure the
software context will ever have any other resources than QSGTextures,
but it doesn't hurt to try and release everything anyway.

Fixes: QTBUG-106968
Change-Id: I58902e1a33c0d3d101e39af3e5f0a18d6820ce98
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
(cherry picked from commit f1b188df132c42da62197055725e5f7eebcc4249)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/quick/scenegraph/adaptations/software/qsgsoftwarecontext.cpp b/src/quick/scenegraph/adaptations/software/qsgsoftwarecontext.cpp
index 4da188bbfe..0c0ee5e579 100644
--- a/src/quick/scenegraph/adaptations/software/qsgsoftwarecontext.cpp
+++ b/src/quick/scenegraph/adaptations/software/qsgsoftwarecontext.cpp
@@ -107,6 +107,18 @@ void QSGSoftwareRenderContext::initializeIfNeeded()
 
 void QSGSoftwareRenderContext::invalidate()
 {
+    qDeleteAll(m_texturesToDelete);
+    m_texturesToDelete.clear();
+
+    qDeleteAll(m_textures);
+    m_textures.clear();
+
+    qDeleteAll(m_fontEnginesToClean);
+    m_fontEnginesToClean.clear();
+
+    qDeleteAll(m_glyphCaches);
+    m_glyphCaches.clear();
+
     m_sg->renderContextInvalidated(this);
     emit invalidated();
 }