From 98549449d695eb3b46eb8713731b69ea07f89d3f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Mon, 7 Oct 2013 14:40:12 +0200
Subject: [PATCH] [aurorae] Implement new render method in Aurorae

Improves the situation a little bit: schedules updates without
rendering to the QWidget, but still fbo -> QImage in each frame.
---
 clients/aurorae/src/aurorae.cpp | 16 +++++++++-------
 clients/aurorae/src/aurorae.h   |  2 ++
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/clients/aurorae/src/aurorae.cpp b/clients/aurorae/src/aurorae.cpp
index 6cf8ce2c3d..5f5000cfb5 100644
--- a/clients/aurorae/src/aurorae.cpp
+++ b/clients/aurorae/src/aurorae.cpp
@@ -276,8 +276,8 @@ void AuroraeClient::init()
         connect(m_view, &QQuickWindow::afterRendering, [this]{
             m_buffer = m_fbo->toImage();
         });
-        connect(m_view, &QQuickWindow::afterRendering, widget(),
-                static_cast<void (QWidget::*)(void)>(&QWidget::update), Qt::QueuedConnection);
+        connect(m_view, &QQuickWindow::afterRendering, this,
+                static_cast<void (KDecoration::*)(void)>(&KDecoration::update), Qt::QueuedConnection);
     }
     m_view->setColor(Qt::transparent);
     m_container = QWidget::createWindowContainer(m_view, widget(), Qt::X11BypassWindowManagerHint);
@@ -295,11 +295,6 @@ void AuroraeClient::init()
 
 bool AuroraeClient::eventFilter(QObject *object, QEvent *event)
 {
-    if (compositingActive() && !m_fbo.isNull() && object == widget() && QEvent::Paint) {
-        QPainter painter(widget());
-        painter.drawImage(QPoint(0, 0), m_buffer);
-        return false;
-    }
     // we need to filter the wheel events on the decoration
     // QML does not yet provide a way to accept wheel events, this will change with Qt 5
     // TODO: remove in KDE5
@@ -597,6 +592,13 @@ bool AuroraeClient::animationsSupported() const
     return compositingActive();
 }
 
+void AuroraeClient::render(QPaintDevice *device, const QRegion &sourceRegion)
+{
+    QPainter painter(device);
+    painter.setClipRegion(sourceRegion);
+    painter.drawImage(QPoint(0, 0), m_buffer);
+}
+
 } // namespace Aurorae
 
 extern "C"
diff --git a/clients/aurorae/src/aurorae.h b/clients/aurorae/src/aurorae.h
index bb5ffed47c..a9081b8892 100644
--- a/clients/aurorae/src/aurorae.h
+++ b/clients/aurorae/src/aurorae.h
@@ -121,6 +121,8 @@ public:
 
     Q_INVOKABLE QVariant readConfig(const QString &key, const QVariant &defaultValue = QVariant());
 
+    virtual void render(QPaintDevice *device, const QRegion &sourceRegion);
+
 Q_SIGNALS:
     void buttonsChanged();
     /**