Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/canvas/source/vcl/backbuffer.hxx b/canvas/source/vcl/backbuffer.hxx
new file mode 100644
index 000000000..0e31111b6
--- /dev/null
+++ b/canvas/source/vcl/backbuffer.hxx
@@ -0,0 +1,50 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <vcl/virdev.hxx>
+
+#include "outdevprovider.hxx"
+
+#include <memory>
+
+namespace vclcanvas
+{
+    /// Background buffer abstraction
+    class BackBuffer : public OutDevProvider
+    {
+    public:
+        /** Create a backbuffer for given reference device */
+        BackBuffer( const OutputDevice& rRefDevice );
+        virtual ~BackBuffer() override;
+
+        virtual OutputDevice&       getOutDev() override;
+        virtual const OutputDevice& getOutDev() const override;
+
+        void setSize( const ::Size& rNewSize );
+
+    private:
+        VclPtr< VirtualDevice > maVDev;
+    };
+
+    typedef std::shared_ptr< BackBuffer > BackBufferSharedPtr;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */