From f5e2783acec1f46070330fc1ce90cb16901a5533 Mon Sep 17 00:00:00 2001
From: Erik Verbruggen <erik.verbruggen@digia.com>
Date: Wed, 21 Sep 2016 12:29:50 +0200
Subject: Quick: Do not send SG updates when AnimatedSprite is not visible

Task-number: QTBUG-55935
Change-Id: I475c1bb3e7aae9499b1b07a52f3c10f54c8b3481
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>
---
 src/quick/items/qquickanimatedsprite.cpp | 32 ++++++++++++++++++++------------
 src/quick/items/qquickanimatedsprite_p.h |  1 +
 2 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/src/quick/items/qquickanimatedsprite.cpp b/src/quick/items/qquickanimatedsprite.cpp
index 44b5ff1e45..7fd89e21a1 100644
--- a/src/quick/items/qquickanimatedsprite.cpp
+++ b/src/quick/items/qquickanimatedsprite.cpp
@@ -35,6 +35,7 @@
 #include "qquicksprite_p.h"
 #include "qquickspriteengine_p.h"
 #include <QtQuick/private/qsgcontext_p.h>
+#include <QtQuick/private/qquickitem_p.h>
 #include <private/qsgadaptationlayer_p.h>
 #include <private/qqmlglobal_p.h>
 #include <QtQuick/qsgnode.h>
@@ -362,7 +363,7 @@ void QQuickAnimatedSprite::start()
     }
     emit currentFrameChanged(0);
     emit runningChanged(true);
-    update();
+    maybeUpdate();
 }
 
 void QQuickAnimatedSprite::stop()
@@ -372,7 +373,7 @@ void QQuickAnimatedSprite::stop()
         return;
     m_pauseOffset = 0;
     emit runningChanged(false);
-    update();
+    maybeUpdate();
 }
 
 /*!
@@ -390,7 +391,15 @@ void QQuickAnimatedSprite::advance(int frames)
         m_curFrame += m_spriteEngine->maxFrames();
     m_curFrame = m_curFrame % m_spriteEngine->maxFrames();
     emit currentFrameChanged(m_curFrame);
-    update();
+    maybeUpdate();
+}
+
+void QQuickAnimatedSprite::maybeUpdate()
+{
+    QQuickItemPrivate *priv = QQuickItemPrivate::get(this);
+    const QLazilyAllocated<QQuickItemPrivate::ExtraData> &extraData = priv->extra;
+    if ((extraData.isAllocated() && extraData->effectRefCount > 0) || priv->effectiveVisible)
+        update();
 }
 
 /*!
@@ -408,7 +417,7 @@ void QQuickAnimatedSprite::pause()
     m_pauseOffset = m_timestamp.elapsed();
     m_paused = true;
     emit pausedChanged(true);
-    update();
+    maybeUpdate();
 }
 
 /*!
@@ -426,7 +435,7 @@ void QQuickAnimatedSprite::resume()
     m_pauseOffset = m_pauseOffset - m_timestamp.elapsed();
     m_paused = false;
     emit pausedChanged(false);
-    update();
+    maybeUpdate();
 }
 
 void QQuickAnimatedSprite::createEngine()
@@ -438,7 +447,6 @@ void QQuickAnimatedSprite::createEngine()
     m_spriteEngine = new QQuickSpriteEngine(QList<QQuickSprite*>(spriteList), this);
     m_spriteEngine->startAssemblingImage();
     reset();
-    update();
 }
 
 static QSGGeometry::Attribute AnimatedSprite_Attributes[] = {
@@ -476,10 +484,10 @@ QSGGeometryNode* QQuickAnimatedSprite::buildNode()
         return 0;
     } else if (m_spriteEngine->status() == QQuickPixmap::Null) {
         m_spriteEngine->startAssemblingImage();
-        update();//Schedule another update, where we will check again
+        maybeUpdate();//Schedule another update, where we will check again
         return 0;
     } else if (m_spriteEngine->status() == QQuickPixmap::Loading) {
-        update();//Schedule another update, where we will check again
+        maybeUpdate();//Schedule another update, where we will check again
         return 0;
     }
 
@@ -541,7 +549,7 @@ QSGGeometryNode* QQuickAnimatedSprite::buildNode()
 void QQuickAnimatedSprite::reset()
 {
     m_pleaseReset = true;
-    update();
+    maybeUpdate();
 }
 
 QSGNode *QQuickAnimatedSprite::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *)
@@ -562,7 +570,7 @@ QSGNode *QQuickAnimatedSprite::updatePaintNode(QSGNode *oldNode, UpdatePaintNode
 
     if (m_running) {
         if (!m_paused)
-            update();
+            maybeUpdate();
 
         if (node) {
             node->markDirty(QSGNode::DirtyMaterial);
@@ -618,7 +626,7 @@ void QQuickAnimatedSprite::prepareNextFrame(QSGGeometryNode *node)
             frameAt = 0;
             m_running = false;
             emit runningChanged(false);
-            update();
+            maybeUpdate();
         }
     } else {
         frameAt = m_curFrame;
@@ -626,7 +634,7 @@ void QQuickAnimatedSprite::prepareNextFrame(QSGGeometryNode *node)
     if (m_curFrame != lastFrame) {
         if (isCurrentFrameChangedConnected())
             emit currentFrameChanged(m_curFrame);
-        update();
+        maybeUpdate();
     }
 
     qreal frameCount = m_spriteEngine->spriteFrames();
diff --git a/src/quick/items/qquickanimatedsprite_p.h b/src/quick/items/qquickanimatedsprite_p.h
index 5b181640f9..01c5c2d3bd 100644
--- a/src/quick/items/qquickanimatedsprite_p.h
+++ b/src/quick/items/qquickanimatedsprite_p.h
@@ -360,6 +360,7 @@ protected:
     void componentComplete() Q_DECL_OVERRIDE;
     QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *) Q_DECL_OVERRIDE;
 private:
+    void maybeUpdate();
     bool isCurrentFrameChangedConnected();
     void prepareNextFrame(QSGGeometryNode *node);
     void reloadImage();
-- 
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