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diff --git a/vcl/source/gdi/wall.cxx b/vcl/source/gdi/wall.cxx
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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 .
+ */
+
+#include <tools/stream.hxx>
+#include <tools/vcompat.hxx>
+#include <vcl/bitmapex.hxx>
+#include <vcl/gradient.hxx>
+#include <vcl/wall.hxx>
+#include <vcl/svapp.hxx>
+#include <vcl/dibtools.hxx>
+#include <vcl/settings.hxx>
+#include <vcl/TypeSerializer.hxx>
+
+SvStream& ReadWallpaper( SvStream& rIStm, Wallpaper& rImplWallpaper )
+{
+ VersionCompatRead aCompat(rIStm);
+
+ rImplWallpaper.maRect.SetEmpty();
+ rImplWallpaper.mpGradient.reset();
+ rImplWallpaper.maBitmap.SetEmpty();
+
+ // version 1
+ TypeSerializer aSerializer(rIStm);
+ aSerializer.readColor(rImplWallpaper.maColor);
+ sal_uInt16 nTmp16(0);
+ rIStm.ReadUInt16(nTmp16);
+ rImplWallpaper.meStyle = static_cast<WallpaperStyle>(nTmp16);
+
+ // version 2
+ if( aCompat.GetVersion() >= 2 )
+ {
+ bool bRect(false), bGrad(false), bBmp(false), bDummy;
+
+ rIStm.ReadCharAsBool( bRect ).ReadCharAsBool( bGrad ).ReadCharAsBool( bBmp ).ReadCharAsBool( bDummy ).ReadCharAsBool( bDummy ).ReadCharAsBool( bDummy );
+
+ if( bRect )
+ {
+ rImplWallpaper.maRect = tools::Rectangle();
+ aSerializer.readRectangle(rImplWallpaper.maRect);
+ }
+
+ if( bGrad )
+ {
+ rImplWallpaper.mpGradient.emplace();
+ aSerializer.readGradient(*rImplWallpaper.mpGradient);
+ }
+
+ if( bBmp )
+ {
+ rImplWallpaper.maBitmap.SetEmpty();
+ ReadDIBBitmapEx(rImplWallpaper.maBitmap, rIStm);
+ }
+
+ // version 3 (new color format)
+ if( aCompat.GetVersion() >= 3 )
+ {
+ sal_uInt32 nTmp;
+ rIStm.ReadUInt32(nTmp);
+ rImplWallpaper.maColor = ::Color(ColorTransparency, nTmp);
+ }
+ }
+
+ return rIStm;
+}
+
+SvStream& WriteWallpaper( SvStream& rOStm, const Wallpaper& rImplWallpaper )
+{
+ VersionCompatWrite aCompat(rOStm, 3);
+ bool bRect = !rImplWallpaper.maRect.IsEmpty();
+ bool bGrad = bool(rImplWallpaper.mpGradient);
+ bool bBmp = !rImplWallpaper.maBitmap.IsEmpty();
+ bool bDummy = false;
+
+ // version 1
+ TypeSerializer aSerializer(rOStm);
+ aSerializer.writeColor(rImplWallpaper.maColor);
+
+ rOStm.WriteUInt16( static_cast<sal_uInt16>(rImplWallpaper.meStyle) );
+
+ // version 2
+ rOStm.WriteBool( bRect ).WriteBool( bGrad ).WriteBool( bBmp ).WriteBool( bDummy ).WriteBool( bDummy ).WriteBool( bDummy );
+
+ if( bRect )
+ {
+ aSerializer.writeRectangle(rImplWallpaper.maRect);
+ }
+
+ if (bGrad)
+ {
+ aSerializer.writeGradient(*rImplWallpaper.mpGradient);
+ }
+
+ if( bBmp )
+ WriteDIBBitmapEx(rImplWallpaper.maBitmap, rOStm);
+
+ // version 3 (new color format)
+ rOStm.WriteUInt32(static_cast<sal_uInt32>(rImplWallpaper.maColor));
+
+ return rOStm;
+}
+
+Wallpaper::Wallpaper() :
+ maColor( COL_TRANSPARENT ), meStyle( WallpaperStyle::NONE )
+{
+}
+
+Wallpaper::Wallpaper( const Wallpaper& ) = default;
+
+Wallpaper::Wallpaper( Wallpaper&& ) = default;
+
+Wallpaper::Wallpaper( const Color& rColor )
+{
+ maColor = rColor;
+ meStyle = WallpaperStyle::Tile;
+}
+
+Wallpaper::Wallpaper( const BitmapEx& rBmpEx )
+{
+ maBitmap = rBmpEx;
+ meStyle = WallpaperStyle::Tile;
+}
+
+Wallpaper::~Wallpaper() = default;
+
+void Wallpaper::ImplSetCachedBitmap( const BitmapEx& rBmp ) const
+{
+ maCache = rBmp;
+}
+
+const BitmapEx* Wallpaper::ImplGetCachedBitmap() const
+{
+ return maCache.IsEmpty() ? nullptr : &maCache;
+}
+
+void Wallpaper::ImplReleaseCachedBitmap() const
+{
+ maCache.SetEmpty();
+}
+
+void Wallpaper::SetColor( const Color& rColor )
+{
+ maCache.SetEmpty();
+ maColor = rColor;
+
+ if( WallpaperStyle::NONE == meStyle || WallpaperStyle::ApplicationGradient == meStyle )
+ meStyle = WallpaperStyle::Tile;
+}
+
+void Wallpaper::SetStyle( WallpaperStyle eStyle )
+{
+ if( eStyle == WallpaperStyle::ApplicationGradient )
+ // set a dummy gradient, the correct gradient
+ // will be created dynamically in GetGradient()
+ SetGradient( ImplGetApplicationGradient() );
+
+ meStyle = eStyle;
+}
+
+void Wallpaper::SetBitmap( const BitmapEx& rBitmap )
+{
+ maCache.SetEmpty();
+ maBitmap = rBitmap;
+
+ if( WallpaperStyle::NONE == meStyle || WallpaperStyle::ApplicationGradient == meStyle)
+ meStyle = WallpaperStyle::Tile;
+}
+
+const BitmapEx & Wallpaper::GetBitmap() const
+{
+ return maBitmap;
+}
+
+bool Wallpaper::IsBitmap() const
+{
+ return !maBitmap.IsEmpty();
+}
+
+void Wallpaper::SetGradient( const Gradient& rGradient )
+{
+ maCache.SetEmpty();
+ mpGradient = rGradient;
+
+ if( WallpaperStyle::NONE == meStyle || WallpaperStyle::ApplicationGradient == meStyle )
+ meStyle = WallpaperStyle::Tile;
+}
+
+Gradient Wallpaper::GetGradient() const
+{
+ if( WallpaperStyle::ApplicationGradient == meStyle )
+ return ImplGetApplicationGradient();
+ else if ( mpGradient )
+ return *mpGradient;
+ else
+ return Gradient();
+}
+
+bool Wallpaper::IsGradient() const
+{
+ return bool(mpGradient);
+}
+
+Gradient Wallpaper::ImplGetApplicationGradient()
+{
+ Gradient g;
+ g.SetAngle( 900_deg10 );
+ g.SetStyle( GradientStyle::Linear );
+ g.SetStartColor( Application::GetSettings().GetStyleSettings().GetFaceColor() );
+ // no 'extreme' gradient when high contrast
+ if( Application::GetSettings().GetStyleSettings().GetHighContrastMode() )
+ g.SetEndColor( Application::GetSettings().GetStyleSettings().GetFaceColor() );
+ else
+ g.SetEndColor( Application::GetSettings().GetStyleSettings().GetFaceGradientColor() );
+ return g;
+}
+
+bool Wallpaper::IsRect() const
+{
+ return !maRect.IsEmpty();
+}
+
+bool Wallpaper::IsFixed() const
+{
+ if ( meStyle == WallpaperStyle::NONE )
+ return false;
+ else
+ return (maBitmap.IsEmpty() && !mpGradient);
+}
+
+bool Wallpaper::IsScrollable() const
+{
+ if ( meStyle == WallpaperStyle::NONE )
+ return false;
+ else if ( maBitmap.IsEmpty() && !mpGradient )
+ return true;
+ else if ( !maBitmap.IsEmpty() )
+ return (meStyle == WallpaperStyle::Tile);
+ else
+ return false;
+}
+
+Wallpaper& Wallpaper::operator=( const Wallpaper& ) = default;
+
+Wallpaper& Wallpaper::operator=( Wallpaper&& ) = default;
+
+bool Wallpaper::operator==( const Wallpaper& rOther ) const
+{
+ return meStyle == rOther.meStyle &&
+ maColor == rOther.maColor &&
+ maRect == rOther.maRect &&
+ maBitmap == rOther.maBitmap &&
+ mpGradient == rOther.mpGradient;
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */