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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SVX_INC_SDR_OVERLAY_OVERLAYMANAGERBUFFERED_HXX
+#define INCLUDED_SVX_INC_SDR_OVERLAY_OVERLAYMANAGERBUFFERED_HXX
+
+#include <svx/sdr/overlay/overlaymanager.hxx>
+#include <basegfx/range/b2irange.hxx>
+#include <vcl/virdev.hxx>
+#include <vcl/idle.hxx>
+
+
+namespace sdr::overlay
+ {
+ class OverlayManagerBuffered final : public OverlayManager
+ {
+ // The VirtualDevice for draw window content buffering, this
+ // is the view content without overlay
+ ScopedVclPtr<VirtualDevice> mpBufferDevice;
+
+ // #i73602# The VirtualDevice for OverlayPaint buffering. This
+ // is an extra device to avoid flickering of overlay paints
+ ScopedVclPtr<VirtualDevice> mpOutputBufferDevice;
+
+ // Idle for buffering
+ Idle maBufferIdle;
+
+ // Range for buffering (in pixel to be independent from mapMode)
+ basegfx::B2IRange maBufferRememberedRangePixel;
+
+ // link for timer
+ DECL_LINK(ImpBufferTimerHandler, Timer*, void);
+
+ // Internal methods for buffering
+ void ImpPrepareBufferDevice();
+ void ImpRestoreBackground() const ;
+ void ImpRestoreBackground(const vcl::Region& rRegionPixel) const;
+ void ImpSaveBackground(const vcl::Region& rRegion, OutputDevice* pPreRenderDevice);
+
+ OverlayManagerBuffered(OutputDevice& rOutputDevice);
+ virtual ~OverlayManagerBuffered() override;
+
+ public:
+ static rtl::Reference<OverlayManager> create(OutputDevice& rOutputDevice);
+
+ // complete redraw
+ virtual void completeRedraw(const vcl::Region& rRegion, OutputDevice* pPreRenderDevice = nullptr) const override;
+
+ // flush. Do buffered updates.
+ virtual void flush() override;
+
+ // invalidate the given range at local OutputDevice
+ virtual void invalidateRange(const basegfx::B2DRange& rRange) override;
+ };
+} // end of namespace sdr::overlay
+
+
+#endif // INCLUDED_SVX_INC_SDR_OVERLAY_OVERLAYMANAGERBUFFERED_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */