Fix QQuickImageParticle in case of QRhi re-create

With this patch QQuickImageParticle will now properly re-query
the m_rhi member the next time updatePaintNode() is called

Additionally a new (override)
QQuickImageParticle::invalidateSceneGraph()
will call reset() so that potential sub-nodes (e.g. SpriteParticle)
will also be re-created

Last but not least: QQuickSpriteEngine::startAssemblingImage()
was missing to reset it's sprites container
(without that the sprites would pile up and eventually
fail with "Too many animations" error)

Pick-to: 6.5 6.4 6.2
Change-Id: I172fd23ddfac475542aabc6cc17d8fee74f728b2
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

3 files changed, 10 insertions, 0 deletions

diff --git a/src/particles/qquickimageparticle.cpp b/src/particles/qquickimageparticle.cpp
index 9730fd1960..07076c6d29 100644
--- a/src/particles/qquickimageparticle.cpp
+++ b/src/particles/qquickimageparticle.cpp
@@ -730,6 +730,7 @@ void QQuickImageParticle::sceneGraphInvalidated()
     m_material = nullptr;
     delete m_outgoingNode;
     m_outgoingNode = nullptr;
+    m_apiChecked = false;
 }
 
 void QQuickImageParticle::setImage(const QUrl &image)
@@ -1038,6 +1039,12 @@ void QQuickImageParticle::reset()
     update();
 }
 
+
+void QQuickImageParticle::invalidateSceneGraph()
+{
+    reset();
+}
+
 void QQuickImageParticle::createEngine()
 {
     if (m_spriteEngine)
diff --git a/src/particles/qquickimageparticle_p.h b/src/particles/qquickimageparticle_p.h
index e92e341718..ecf463ba13 100644
--- a/src/particles/qquickimageparticle_p.h
+++ b/src/particles/qquickimageparticle_p.h
@@ -359,6 +359,8 @@ private Q_SLOTS:
     void spritesUpdate(qreal time = 0 );
     void mainThreadFetchImageData();
     void finishBuildParticleNodes(QSGNode **n);
+    void invalidateSceneGraph();
+
 private:
     struct ImageData {
         QUrl source;
diff --git a/src/quick/items/qquickspriteengine.cpp b/src/quick/items/qquickspriteengine.cpp
index fe3cb1f247..5d33092e6d 100644
--- a/src/quick/items/qquickspriteengine.cpp
+++ b/src/quick/items/qquickspriteengine.cpp
@@ -316,6 +316,7 @@ void QQuickSpriteEngine::startAssemblingImage()
         return;
     m_loaded = false;
     m_errorsPrinted = false;
+    m_sprites.clear();
 
     //This could also trigger the start of the image loading in Sprites, however that currently happens in Sprite::setSource