1 files changed, 72 insertions, 0 deletions
diff --git a/src/core/backing_store_qt.h b/src/core/backing_store_qt.h
new file mode 100644
index 000000000..24f232a02
--- /dev/null
+++ b/src/core/backing_store_qt.h
@@ -0,0 +1,72 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtWebEngine module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef BACKING_STORE_QT_H
+#define BACKING_STORE_QT_H
+
+#include "content/browser/renderer_host/backing_store.h"
+
+#include <QPainter>
+#include <QImage>
+
+class BackingStoreQt : public content::BackingStore
+{
+public:
+    BackingStoreQt(content::RenderWidgetHost *host, const gfx::Size &size, QWindow* parent);
+    ~BackingStoreQt();
+
+    void paintToTarget(QPainter*, const QRectF& rect);
+
+    virtual void PaintToBackingStore(content::RenderProcessHost *process, TransportDIB::Id bitmap, const gfx::Rect &bitmap_rect,
+                                     const std::vector<gfx::Rect> &copy_rects, float scale_factor, const base::Closure &completion_callback,
+                                     bool *scheduled_completion_callback) Q_DECL_OVERRIDE;
+
+    virtual void ScrollBackingStore(const gfx::Vector2d &delta, const gfx::Rect &clip_rect, const gfx::Size &view_size) Q_DECL_OVERRIDE;
+    virtual bool CopyFromBackingStore(const gfx::Rect &rect, skia::PlatformBitmap *output) Q_DECL_OVERRIDE;
+
+private:
+    // Number of physical pixels per view unit. This is 1 or 2 in practice.
+    float m_deviceScaleFactor;
+
+    QImage m_pixelBuffer;
+};
+
+#endif // BACKING_STORE_QT_H