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

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

17 files changed, 8480 insertions, 0 deletions

diff --git a/slideshow/source/engine/slide/layer.cxx b/slideshow/source/engine/slide/layer.cxx
new file mode 100644
index 000000000..01ce4efa4
--- /dev/null
+++ b/slideshow/source/engine/slide/layer.cxx
@@ -0,0 +1,272 @@
+/* -*- 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 <basegfx/range/b2drange.hxx>
+#include <basegfx/range/b1drange.hxx>
+#include <basegfx/range/b2dpolyrange.hxx>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <basegfx/polygon/b2dpolypolygoncutter.hxx>
+#include <osl/diagnose.h>
+
+#include "layer.hxx"
+
+using namespace ::com::sun::star;
+
+namespace slideshow::internal
+{
+        Layer::Layer( Dummy                     ) :
+            maViewEntries(),
+            maBounds(),
+            maNewBounds(),
+            mbBoundsDirty(false),
+            mbBackgroundLayer(true),
+            mbClipSet(false)
+        {
+        }
+
+        Layer::Layer() :
+            maViewEntries(),
+            maBounds(),
+            maNewBounds(),
+            mbBoundsDirty(false),
+            mbBackgroundLayer(false),
+            mbClipSet(false)
+        {
+        }
+
+        ViewLayerSharedPtr Layer::addView( const ViewSharedPtr& rNewView )
+        {
+            OSL_ASSERT( rNewView );
+
+            ViewEntryVector::iterator aIter;
+            const ViewEntryVector::iterator aEnd( maViewEntries.end() );
+            if( (aIter=std::find_if( maViewEntries.begin(),
+                                     aEnd,
+                                     [&rNewView]( const ViewEntry& rViewEntry )
+                                     { return rViewEntry.getView() == rNewView; } ) ) != aEnd )
+            {
+                // already added - just return existing layer
+                return aIter->mpViewLayer;
+
+            }
+
+            // not yet added - create new view layer
+            ViewLayerSharedPtr pNewLayer;
+            if( mbBackgroundLayer )
+                pNewLayer = rNewView;
+            else
+                pNewLayer = rNewView->createViewLayer(maBounds);
+
+            // add to local list
+            maViewEntries.emplace_back( rNewView,
+                           pNewLayer );
+
+            return maViewEntries.back().mpViewLayer;
+        }
+
+        ViewLayerSharedPtr Layer::removeView( const ViewSharedPtr& rView )
+        {
+            OSL_ASSERT( rView );
+
+            ViewEntryVector::iterator       aIter;
+            const ViewEntryVector::iterator aEnd( maViewEntries.end() );
+            if( (aIter=std::find_if( maViewEntries.begin(),
+                                       aEnd,
+                                       [&rView]( const ViewEntry& rViewEntry )
+                                       { return rViewEntry.getView() == rView; } ) ) == aEnd )
+            {
+                // View was not added/is already removed
+                return ViewLayerSharedPtr();
+            }
+
+            OSL_ENSURE( std::count_if( maViewEntries.begin(),
+                                       aEnd,
+                                       [&rView]( const ViewEntry& rViewEntry )
+                                       { return rViewEntry.getView() == rView; } ) == 1,
+                        "Layer::removeView(): view added multiple times" );
+
+            ViewLayerSharedPtr pRet( aIter->mpViewLayer );
+            maViewEntries.erase(aIter);
+
+            return pRet;
+        }
+
+        void Layer::setShapeViews( ShapeSharedPtr const& rShape ) const
+        {
+            rShape->clearAllViewLayers();
+
+            for( const auto& rViewEntry : maViewEntries )
+                rShape->addViewLayer( rViewEntry.getViewLayer(), false );
+        }
+
+        void Layer::setPriority( const ::basegfx::B1DRange& rPrioRange )
+        {
+            if( !mbBackgroundLayer )
+            {
+                for( const auto& rViewEntry : maViewEntries )
+                    rViewEntry.getViewLayer()->setPriority( rPrioRange );
+            }
+        }
+
+        void Layer::addUpdateRange( ::basegfx::B2DRange const& rUpdateRange )
+        {
+            // TODO(Q1): move this to B2DMultiRange
+            if( !rUpdateRange.isEmpty() )
+                maUpdateAreas.appendElement( rUpdateRange,
+                                             basegfx::B2VectorOrientation::Positive );
+        }
+
+        void Layer::updateBounds( ShapeSharedPtr const& rShape )
+        {
+            if( !mbBackgroundLayer )
+            {
+                if( !mbBoundsDirty )
+                    maNewBounds.reset();
+
+                maNewBounds.expand( rShape->getUpdateArea() );
+            }
+
+            mbBoundsDirty = true;
+        }
+
+        bool Layer::commitBounds()
+        {
+            mbBoundsDirty = false;
+
+            if( mbBackgroundLayer )
+                return false;
+
+            if( maNewBounds == maBounds )
+                return false;
+
+            maBounds = maNewBounds;
+            if( std::count_if( maViewEntries.begin(),
+                               maViewEntries.end(),
+                               [this]( const ViewEntry& rViewEntry )
+                               { return rViewEntry.getViewLayer()->resize( this->maBounds ); }
+                               ) == 0 )
+            {
+                return false;
+            }
+
+            // layer content invalid, update areas have wrong
+            // coordinates/not sensible anymore.
+            clearUpdateRanges();
+
+            return true;
+        }
+
+        void Layer::clearUpdateRanges()
+        {
+            maUpdateAreas.clear();
+        }
+
+        void Layer::clearContent()
+        {
+            // clear content on all view layers
+            for( const auto& rViewEntry : maViewEntries )
+                rViewEntry.getViewLayer()->clearAll();
+
+            // layer content cleared, update areas are not sensible
+            // anymore.
+            clearUpdateRanges();
+        }
+
+        class LayerEndUpdate
+        {
+        public:
+            LayerEndUpdate( const LayerEndUpdate& ) = delete;
+            LayerEndUpdate& operator=( const LayerEndUpdate& ) = delete;
+            explicit LayerEndUpdate( LayerSharedPtr const& rLayer ) :
+                mpLayer( rLayer )
+            {}
+
+            ~LayerEndUpdate() { if(mpLayer) mpLayer->endUpdate(); }
+
+        private:
+            LayerSharedPtr mpLayer;
+        };
+
+        Layer::EndUpdater Layer::beginUpdate()
+        {
+            if( maUpdateAreas.count() )
+            {
+                // perform proper layer update. That means, setup proper
+                // clipping, and render each shape that intersects with
+                // the calculated update area
+                ::basegfx::B2DPolyPolygon aClip( maUpdateAreas.solveCrossovers() );
+                aClip = ::basegfx::utils::stripNeutralPolygons(aClip);
+                aClip = ::basegfx::utils::stripDispensablePolygons(aClip);
+
+                // actually, if there happen to be shapes with zero
+                // update area in the maUpdateAreas vector, the
+                // resulting clip polygon will be empty.
+                if( aClip.count() )
+                {
+                    for( const auto& rViewEntry : maViewEntries )
+                    {
+                        const ViewLayerSharedPtr& pViewLayer = rViewEntry.getViewLayer();
+
+                        // set clip to all view layers and
+                        pViewLayer->setClip( aClip );
+
+                        // clear update area on all view layers
+                        pViewLayer->clear();
+                    }
+
+                    mbClipSet = true;
+                }
+            }
+
+            return std::make_shared<LayerEndUpdate>(shared_from_this());
+        }
+
+        void Layer::endUpdate()
+        {
+            if( mbClipSet )
+            {
+                mbClipSet = false;
+
+                basegfx::B2DPolyPolygon aEmptyClip;
+                for( const auto& rViewEntry : maViewEntries )
+                    rViewEntry.getViewLayer()->setClip( aEmptyClip );
+            }
+
+            clearUpdateRanges();
+        }
+
+        bool Layer::isInsideUpdateArea( ShapeSharedPtr const& rShape ) const
+        {
+            return maUpdateAreas.overlaps( rShape->getUpdateArea() );
+        }
+
+        LayerSharedPtr Layer::createBackgroundLayer()
+        {
+            return LayerSharedPtr(new Layer( BackgroundLayer ));
+        }
+
+        LayerSharedPtr Layer::createLayer( )
+        {
+            return LayerSharedPtr( new Layer );
+        }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/layer.hxx b/slideshow/source/engine/slide/layer.hxx
new file mode 100644
index 000000000..73f3fcce9
--- /dev/null
+++ b/slideshow/source/engine/slide/layer.hxx
@@ -0,0 +1,263 @@
+/* -*- 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_SLIDESHOW_SOURCE_ENGINE_SLIDE_LAYER_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_LAYER_HXX
+
+#include <basegfx/range/b2dpolyrange.hxx>
+
+#include <shape.hxx>
+#include <view.hxx>
+
+#include <vector>
+#include <memory>
+
+
+namespace slideshow::internal
+    {
+        class LayerEndUpdate;
+        class Layer;
+        typedef ::std::shared_ptr< Layer >    LayerSharedPtr;
+        typedef ::std::weak_ptr< Layer >      LayerWeakPtr;
+
+
+        /* Definition of Layer class */
+
+        /** This class represents one layer of output on a Slide.
+
+            Layers group shapes for a certain depth region of a slide.
+
+            Since slides have a notion of depth, i.e. shapes on it
+            have a certain order in which they lie upon each other,
+            this layering must be modelled. A prime example for this
+            necessity are animations of shapes lying behind other
+            shapes. Then, everything behind the animated shape will be
+            in a background layer, the shape itself will be in an
+            animation layer, and everything before it will be in a
+            foreground layer (these layers are most preferably
+            modelled as XSprite objects internally).
+
+            @attention All methods of this class are only supposed to
+            be called from the LayerManager. Normally, it shouldn't be
+            possible to get hold of an instance of this class at all.
+         */
+        class Layer : public std::enable_shared_from_this<Layer>
+        {
+        public:
+            typedef std::shared_ptr<LayerEndUpdate> EndUpdater;
+
+            /// Forbid copy construction
+            Layer(const Layer&) = delete;
+            /// Forbid copy assignment
+            Layer& operator=(const Layer&) = delete;
+
+            /** Create background layer
+
+                This method will create a layer without a ViewLayer,
+                i.e. one that displays directly on the background.
+             */
+            static LayerSharedPtr createBackgroundLayer();
+
+            /** Create non-background layer
+
+                This method will create a layer in front of the
+                background, to contain shapes that should appear in
+                front of animated objects.
+             */
+            static LayerSharedPtr createLayer();
+
+
+            /** Predicate, whether this layer is the special
+                background layer
+
+                This method is mostly useful for checking invariants.
+             */
+            bool isBackgroundLayer() const { return mbBackgroundLayer; }
+
+            /** Add a view to this layer.
+
+                If the view is already added, this method does not add
+                it a second time, just returning the existing ViewLayer.
+
+                @param rNewView
+                New view to add to this layer.
+
+                @return the newly generated ViewLayer for this View
+             */
+            ViewLayerSharedPtr addView( const ViewSharedPtr& rNewView );
+
+            /** Remove a view
+
+                This method removes the view from this Layer and all
+                shapes included herein.
+
+                @return the ViewLayer of the removed Layer, if
+                any. Otherwise, NULL is returned.
+             */
+            ViewLayerSharedPtr removeView( const ViewSharedPtr& rView );
+
+            /** Init shape with this layer's views
+
+                @param rShape
+                The shape, that will subsequently display on this
+                layer's views
+             */
+            void setShapeViews( ShapeSharedPtr const& rShape ) const;
+
+
+            /** Change layer priority range.
+
+                The layer priority affects the position of the layer
+                in the z direction (i.e. before/behind which other
+                layers this one appears). The higher the prio, the
+                further on top of the layer stack this one appears.
+
+                @param rPrioRange
+                The priority range of differing layers must not
+                intersect
+             */
+            void setPriority( const ::basegfx::B1DRange& rPrioRange );
+
+            /** Add an area that needs update
+
+                @param rUpdateRange
+                Area on this layer that needs update
+             */
+            void addUpdateRange( ::basegfx::B2DRange const& rUpdateRange );
+
+            /** Whether any update ranges have been added
+
+                @return true, if any non-empty addUpdateRange() calls
+                have been made since the last render()/update() call.
+             */
+            bool isUpdatePending() const { return maUpdateAreas.count()!=0; }
+
+            /** Update layer bound rect from shape bounds
+             */
+            void updateBounds( ShapeSharedPtr const& rShape );
+
+            /** Commit collected layer bounds to ViewLayer
+
+                Call this method when you're done adding new shapes to
+                the layer.
+
+                @return true, if layer needed a resize (which
+                invalidates its content - you have to repaint all
+                contained shapes!)
+             */
+            bool commitBounds();
+
+            /** Clear all registered update ranges
+
+                This method clears all update ranges that are
+                registered at this layer.
+             */
+            void clearUpdateRanges();
+
+            /** Clear whole layer content
+
+                This method clears the whole layer content. As a
+                byproduct, all update ranges are cleared as well. It
+                makes no sense to maintain them any further, since
+                they only serve for partial updates.
+             */
+            void clearContent();
+
+            /** Init layer update.
+
+                This method initializes a full layer update of the
+                update area. When the last copy of the returned
+                EndUpdater is destroyed, the Layer leaves update mode
+                again.
+
+                @return an update end RAII object.
+            */
+            EndUpdater beginUpdate();
+
+            /** Finish layer update
+
+                Resets clipping and transformation to normal values
+             */
+            void endUpdate();
+
+            /** Check whether given shape is inside current update area.
+
+                @return true, if the given shape is at least partially
+                inside the current update area.
+            */
+            bool isInsideUpdateArea( ShapeSharedPtr const& rShape ) const;
+
+        private:
+            enum Dummy{ BackgroundLayer };
+
+            /** Create background layer
+
+                This constructor will create a layer without a
+                ViewLayer, i.e. one that displays directly on the
+                background.
+
+                @param eFlag
+                Dummy parameter, to disambiguate from normal layer
+                constructor
+             */
+            explicit Layer( Dummy                    eFlag );
+
+            /** Create non-background layer
+
+                This constructor will create a layer in front of the
+                background, to contain shapes that should appear in
+                front of animated objects.
+             */
+            explicit Layer();
+
+            struct ViewEntry
+            {
+                ViewEntry( const ViewSharedPtr&      rView,
+                           const ViewLayerSharedPtr& rViewLayer ) :
+                    mpView( rView ),
+                    mpViewLayer( rViewLayer )
+                {}
+
+                ViewSharedPtr      mpView;
+                ViewLayerSharedPtr mpViewLayer;
+
+                // for generic algo access (which needs actual functions)
+                const ViewSharedPtr&      getView() const { return mpView; }
+                const ViewLayerSharedPtr& getViewLayer() const { return mpViewLayer; }
+            };
+
+            typedef ::std::vector< ViewEntry > ViewEntryVector;
+
+            ViewEntryVector            maViewEntries;
+            basegfx::B2DPolyRange      maUpdateAreas;
+            basegfx::B2DRange          maBounds;
+            basegfx::B2DRange          maNewBounds;
+            bool                       mbBoundsDirty;     // true, if view layers need resize
+            bool                       mbBackgroundLayer; // true, if this
+                                                          // layer is the
+                                                          // special
+                                                          // background layer
+            bool                       mbClipSet; // true, if beginUpdate set a clip
+        };
+
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_LAYER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/layermanager.cxx b/slideshow/source/engine/slide/layermanager.cxx
new file mode 100644
index 000000000..74a26d1e7
--- /dev/null
+++ b/slideshow/source/engine/slide/layermanager.cxx
@@ -0,0 +1,833 @@
+/* -*- 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/diagnose_ex.h>
+#include <basegfx/range/b1drange.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <cppcanvas/canvas.hxx>
+
+#include <functional>
+#include <algorithm>
+
+#include "layermanager.hxx"
+
+using namespace ::com::sun::star;
+
+namespace
+{
+    // add operator!= for weak_ptr
+    bool notEqual( slideshow::internal::LayerWeakPtr const& rLHS,
+                            slideshow::internal::LayerWeakPtr const& rRHS )
+    {
+        return rLHS.lock().get() != rRHS.lock().get();
+    }
+}
+
+namespace slideshow::internal
+{
+        template<typename LayerFunc,
+                 typename ShapeFunc> void LayerManager::manageViews(
+                     LayerFunc layerFunc,
+                     ShapeFunc shapeFunc )
+        {
+            LayerSharedPtr                      pCurrLayer;
+            ViewLayerSharedPtr                  pCurrViewLayer;
+            for( const auto& rShape : maAllShapes )
+            {
+                LayerSharedPtr pLayer = rShape.second.lock();
+                if( pLayer && pLayer != pCurrLayer )
+                {
+                    pCurrLayer = pLayer;
+                    pCurrViewLayer = layerFunc(pCurrLayer);
+                }
+
+                if( pCurrViewLayer )
+                    shapeFunc(rShape.first,pCurrViewLayer);
+            }
+        }
+
+        LayerManager::LayerManager( const UnoViewContainer&    rViews,
+                                    bool                       bDisableAnimationZOrder ) :
+            mrViews(rViews),
+            maLayers(),
+            maXShapeHash( 101 ),
+            maAllShapes(),
+            maUpdateShapes(),
+            mnActiveSprites(0),
+            mbLayerAssociationDirty(false),
+            mbActive(false),
+            mbDisableAnimationZOrder(bDisableAnimationZOrder)
+        {
+            // prevent frequent resizes (won't have more than 4 layers
+            // for 99.9% of the cases)
+            maLayers.reserve(4);
+
+            // create initial background layer
+            maLayers.push_back( Layer::createBackgroundLayer() );
+
+            // init views
+            for( const auto& rView : mrViews )
+                viewAdded( rView );
+        }
+
+        void LayerManager::activate()
+        {
+            mbActive = true;
+            maUpdateShapes.clear(); // update gets forced via area, or
+                                    // has happened outside already
+
+            // clear all possibly pending update areas - content
+            // is there, already
+            for( const auto& pLayer : maLayers )
+                pLayer->clearUpdateRanges();
+
+            updateShapeLayers( true/*bSlideBackgroundPainted*/ );
+        }
+
+        void LayerManager::deactivate()
+        {
+            // TODO(F3): This is mostly a hack. Problem is, there's
+            // currently no smart way of telling shapes "remove your
+            // sprites". Others, like MediaShapes, listen to
+            // start/stop animation events, which is too much overhead
+            // for all shapes, though.
+
+            const bool bMoreThanOneLayer(maLayers.size() > 1);
+            if (mnActiveSprites || bMoreThanOneLayer)
+            {
+                // clear all viewlayers, dump everything but the
+                // background layer - this will also remove all shape
+                // sprites
+                for (auto& rShape : maAllShapes)
+                    rShape.first->clearAllViewLayers();
+
+                for (auto& rShape : maAllShapes)
+                    rShape.second.reset();
+
+                if (bMoreThanOneLayer)
+                    maLayers.erase(maLayers.begin() + 1, maLayers.end());
+
+                mbLayerAssociationDirty = true;
+            }
+
+            mbActive = false;
+
+            // only background layer left
+            OSL_ASSERT( maLayers.size() == 1 && maLayers.front()->isBackgroundLayer() );
+        }
+
+        void LayerManager::viewAdded( const UnoViewSharedPtr& rView )
+        {
+            // view must be member of mrViews container
+            OSL_ASSERT( std::find(mrViews.begin(),
+                                  mrViews.end(),
+                                  rView) != mrViews.end() );
+
+            // init view content
+            if( mbActive )
+                rView->clearAll();
+
+            // add View to all registered shapes
+            manageViews(
+                [&rView]( const LayerSharedPtr& pLayer )
+                { return pLayer->addView( rView ); },
+                []( const ShapeSharedPtr& pShape, const ViewLayerSharedPtr& pLayer )
+                { return pShape->addViewLayer( pLayer, true ); } );
+
+            // in case we haven't reached all layers from the
+            // maAllShapes, issue addView again for good measure
+            for( const auto& pLayer : maLayers )
+                pLayer->addView( rView );
+        }
+
+        void LayerManager::viewRemoved( const UnoViewSharedPtr& rView )
+        {
+            // view must not be member of mrViews container anymore
+            OSL_ASSERT( std::find(mrViews.begin(),
+                                  mrViews.end(),
+                                  rView) == mrViews.end() );
+
+            // remove View from all registered shapes
+            manageViews(
+                [&rView]( const LayerSharedPtr& pLayer )
+                { return pLayer->removeView( rView ); },
+                []( const ShapeSharedPtr& pShape, const ViewLayerSharedPtr& pLayer )
+                { return pShape->removeViewLayer( pLayer ); } );
+
+            // in case we haven't reached all layers from the
+            // maAllShapes, issue removeView again for good measure
+            for( const auto& pLayer : maLayers )
+                pLayer->removeView( rView );
+        }
+
+        void LayerManager::viewChanged( const UnoViewSharedPtr& rView )
+        {
+            // view must be member of mrViews container
+            OSL_ASSERT( std::find(mrViews.begin(),
+                                  mrViews.end(),
+                                  rView) != mrViews.end() );
+
+            // TODO(P2): selectively update only changed view
+            viewsChanged();
+        }
+
+        void LayerManager::viewsChanged()
+        {
+            if( !mbActive )
+                return;
+
+            // clear view area
+            for( const auto& pView : mrViews )
+                pView->clearAll();
+
+            // TODO(F3): resize and repaint all layers
+
+            // render all shapes
+            for( const auto& rShape : maAllShapes )
+                rShape.first->render();
+        }
+
+        void LayerManager::addShape( const ShapeSharedPtr& rShape )
+        {
+            OSL_ASSERT( !maLayers.empty() ); // always at least background layer
+            ENSURE_OR_THROW( rShape, "LayerManager::addShape(): invalid Shape" );
+
+            // add shape to XShape hash map
+            if( !maXShapeHash.emplace(rShape->getXShape(),
+                                      rShape).second )
+            {
+                // entry already present, nothing to do
+                return;
+            }
+
+            // add shape to appropriate layer
+            implAddShape( rShape );
+        }
+
+        void LayerManager::putShape2BackgroundLayer( LayerShapeMap::value_type& rShapeEntry )
+        {
+            LayerSharedPtr& rBgLayer( maLayers.front() );
+            rBgLayer->setShapeViews(rShapeEntry.first);
+            rShapeEntry.second = rBgLayer;
+        }
+
+        void LayerManager::implAddShape( const ShapeSharedPtr& rShape )
+        {
+            OSL_ASSERT( !maLayers.empty() ); // always at least background layer
+            ENSURE_OR_THROW( rShape, "LayerManager::implAddShape(): invalid Shape" );
+
+            LayerShapeMap::value_type aValue (rShape, LayerWeakPtr());
+
+            OSL_ASSERT( maAllShapes.find(rShape) == maAllShapes.end() ); // shape must not be added already
+            mbLayerAssociationDirty = true;
+
+            if( mbDisableAnimationZOrder )
+                putShape2BackgroundLayer(
+                    *maAllShapes.insert(aValue).first );
+            else
+                maAllShapes.insert(aValue);
+
+            // update shape, it's just added and not yet painted
+            if( rShape->isVisible() )
+                notifyShapeUpdate( rShape );
+        }
+
+        bool LayerManager::removeShape( const ShapeSharedPtr& rShape )
+        {
+            // remove shape from XShape hash map
+            if( maXShapeHash.erase( rShape->getXShape() ) == 0 )
+                return false; // shape not in map
+
+            OSL_ASSERT( maAllShapes.find(rShape) != maAllShapes.end() );
+
+            implRemoveShape( rShape );
+
+            return true;
+        }
+
+        void LayerManager::implRemoveShape( const ShapeSharedPtr& rShape )
+        {
+            OSL_ASSERT( !maLayers.empty() ); // always at least background layer
+            ENSURE_OR_THROW( rShape, "LayerManager::implRemoveShape(): invalid Shape" );
+
+            const LayerShapeMap::iterator aShapeEntry( maAllShapes.find(rShape) );
+
+            if( aShapeEntry == maAllShapes.end() )
+                return;
+
+            const bool bShapeUpdateNotified = maUpdateShapes.erase( rShape ) != 0;
+
+            // Enter shape area to the update area, but only if shape
+            // is visible and not in sprite mode (otherwise, updating
+            // the area doesn't do actual harm, but costs time)
+            // Actually, also add it if it was listed in
+            // maUpdateShapes (might have just gone invisible).
+            if( bShapeUpdateNotified ||
+                (rShape->isVisible() &&
+                 !rShape->isBackgroundDetached()) )
+            {
+                LayerSharedPtr pLayer = aShapeEntry->second.lock();
+                if( pLayer )
+                {
+                    // store area early, once the shape is removed from
+                    // the layers, it no longer has any view references
+                    pLayer->addUpdateRange( rShape->getUpdateArea() );
+                }
+            }
+
+            rShape->clearAllViewLayers();
+            maAllShapes.erase( aShapeEntry );
+
+            mbLayerAssociationDirty = true;
+        }
+
+        ShapeSharedPtr LayerManager::lookupShape( const uno::Reference< drawing::XShape >& xShape ) const
+        {
+            ENSURE_OR_THROW( xShape.is(), "LayerManager::lookupShape(): invalid Shape" );
+
+            const XShapeToShapeMap::const_iterator aIter( maXShapeHash.find( xShape ));
+            if( aIter == maXShapeHash.end() )
+                return ShapeSharedPtr(); // not found
+
+            // found, return data part of entry pair.
+            return aIter->second;
+        }
+
+        AttributableShapeSharedPtr LayerManager::getSubsetShape( const AttributableShapeSharedPtr&  rOrigShape,
+                                                                 const DocTreeNode&                 rTreeNode )
+        {
+            OSL_ASSERT( !maLayers.empty() ); // always at least background layer
+
+            AttributableShapeSharedPtr pSubset;
+
+            // shape already added?
+            if( rOrigShape->createSubset( pSubset,
+                                          rTreeNode ) )
+            {
+                OSL_ENSURE( pSubset, "LayerManager::getSubsetShape(): failed to create subset" );
+
+                // don't add to shape hash, we're dupes to the
+                // original XShape anyway - all subset shapes return
+                // the same XShape as the original one.
+
+                // add shape to corresponding layer
+                implAddShape( pSubset );
+
+                // update original shape, it now shows less content
+                // (the subset is removed from its displayed
+                // output). Subset shape is updated within
+                // implAddShape().
+                if( rOrigShape->isVisible() )
+                    notifyShapeUpdate( rOrigShape );
+            }
+
+            return pSubset;
+        }
+
+        const XShapeToShapeMap& LayerManager::getXShapeToShapeMap() const
+        {
+            return maXShapeHash;
+        }
+
+        void LayerManager::revokeSubset( const AttributableShapeSharedPtr& rOrigShape,
+                                         const AttributableShapeSharedPtr& rSubsetShape )
+        {
+            OSL_ASSERT( !maLayers.empty() ); // always at least background layer
+
+            if( rOrigShape->revokeSubset( rSubsetShape ) )
+            {
+                OSL_ASSERT( maAllShapes.find(rSubsetShape) != maAllShapes.end() );
+
+                implRemoveShape( rSubsetShape );
+
+                // update original shape, it now shows more content
+                // (the subset is added back to its displayed output)
+                if( rOrigShape->isVisible() )
+                    notifyShapeUpdate( rOrigShape );
+            }
+        }
+
+        void LayerManager::enterAnimationMode( const AnimatableShapeSharedPtr& rShape )
+        {
+            OSL_ASSERT( !maLayers.empty() ); // always at least background layer
+            ENSURE_OR_THROW( rShape, "LayerManager::enterAnimationMode(): invalid Shape" );
+
+            const bool bPrevAnimState( rShape->isBackgroundDetached() );
+
+            rShape->enterAnimationMode();
+
+            // if this call _really_ enabled the animation mode at
+            // rShape, insert it to our enter animation queue, to
+            // perform the necessary layer reorg lazily on
+            // LayerManager::update()/render().
+            if( bPrevAnimState != rShape->isBackgroundDetached() )
+            {
+                ++mnActiveSprites;
+                mbLayerAssociationDirty = true;
+
+                // area needs update (shape is removed from normal
+                // slide, and now rendered as an autonomous
+                // sprite). store in update set
+                if( rShape->isVisible() )
+                    addUpdateArea( rShape );
+            }
+
+            // TODO(P1): this can lead to potential wasted effort, if
+            // a shape gets toggled animated/unanimated a few times
+            // between two frames, returning to the original state.
+        }
+
+        void LayerManager::leaveAnimationMode( const AnimatableShapeSharedPtr& rShape )
+        {
+            ENSURE_OR_THROW( !maLayers.empty(), "LayerManager::leaveAnimationMode(): no layers" );
+            ENSURE_OR_THROW( rShape, "LayerManager::leaveAnimationMode(): invalid Shape" );
+
+            const bool bPrevAnimState( rShape->isBackgroundDetached() );
+
+            rShape->leaveAnimationMode();
+
+            // if this call _really_ ended the animation mode at
+            // rShape, insert it to our leave animation queue, to
+            // perform the necessary layer reorg lazily on
+            // LayerManager::update()/render().
+            if( bPrevAnimState != rShape->isBackgroundDetached() )
+            {
+                --mnActiveSprites;
+                mbLayerAssociationDirty = true;
+
+                // shape needs update, no previous rendering, fast
+                // update possible.
+                if( rShape->isVisible() )
+                    notifyShapeUpdate( rShape );
+            }
+
+            // TODO(P1): this can lead to potential wasted effort, if
+            // a shape gets toggled animated/unanimated a few times
+            // between two frames, returning to the original state.
+        }
+
+        void LayerManager::notifyShapeUpdate( const ShapeSharedPtr& rShape )
+        {
+            if( !mbActive || mrViews.empty() )
+                return;
+
+            // hidden sprite-shape needs render() call still, to hide sprite
+            if( rShape->isVisible() || rShape->isBackgroundDetached() )
+                maUpdateShapes.insert( rShape );
+            else
+                addUpdateArea( rShape );
+        }
+
+        bool LayerManager::isUpdatePending() const
+        {
+            if( !mbActive )
+                return false;
+
+            if( mbLayerAssociationDirty || !maUpdateShapes.empty() )
+                return true;
+
+            return std::any_of( maLayers.begin(),
+                                maLayers.end(),
+                                std::mem_fn(&Layer::isUpdatePending) );
+        }
+
+        bool LayerManager::updateSprites()
+        {
+            bool bRet(true);
+
+            // send update() calls to every shape in the
+            // maUpdateShapes set, which is _animated_ (i.e. a
+            // sprite).
+            for( const auto& pShape : maUpdateShapes )
+            {
+                if( pShape->isBackgroundDetached() )
+                {
+                    // can update shape directly, without
+                    // affecting layer content (shape is
+                    // currently displayed in a sprite)
+                    if( !pShape->update() )
+                        bRet = false; // delay error exit
+                }
+                else
+                {
+                    // TODO(P2): addUpdateArea() involves log(n)
+                    // search for shape layer. Have a frequent
+                    // shape/layer association cache, or ptr back to
+                    // layer at the shape?
+
+                    // cannot update shape directly, it's not
+                    // animated and update() calls will prolly
+                    // overwrite other page content.
+                    addUpdateArea( pShape );
+                }
+            }
+
+            maUpdateShapes.clear();
+
+            return bRet;
+        }
+
+        bool LayerManager::update()
+        {
+            bool bRet = true;
+
+            if( !mbActive )
+                return bRet;
+
+            // going to render - better flush any pending layer reorg
+            // now
+            updateShapeLayers(false);
+
+            // all sprites
+            bRet = updateSprites();
+
+            // any non-sprite update areas left?
+            if( std::none_of( maLayers.begin(),
+                              maLayers.end(),
+                              std::mem_fn( &Layer::isUpdatePending ) ) )
+                return bRet; // nope, done.
+
+            // update each shape on each layer, that has
+            // isUpdatePending()
+            bool                                bIsCurrLayerUpdating(false);
+            Layer::EndUpdater                   aEndUpdater;
+            LayerSharedPtr                      pCurrLayer;
+            for( const auto& rShape : maAllShapes )
+            {
+                LayerSharedPtr pLayer = rShape.second.lock();
+                if( pLayer != pCurrLayer )
+                {
+                    pCurrLayer = pLayer;
+                    bIsCurrLayerUpdating = pCurrLayer->isUpdatePending();
+
+                    if( bIsCurrLayerUpdating )
+                        aEndUpdater = pCurrLayer->beginUpdate();
+                }
+
+                if( bIsCurrLayerUpdating &&
+                    !rShape.first->isBackgroundDetached() &&
+                    pCurrLayer->isInsideUpdateArea(rShape.first) )
+                {
+                    if( !rShape.first->render() )
+                        bRet = false;
+                }
+            }
+
+            return bRet;
+        }
+
+        namespace
+        {
+            /** Little wrapper around a Canvas, to render one-shot
+                into a canvas
+             */
+            class DummyLayer : public ViewLayer
+            {
+            public:
+                explicit DummyLayer( const ::cppcanvas::CanvasSharedPtr& rCanvas ) :
+                    mpCanvas( rCanvas )
+                {
+                }
+
+                virtual bool isOnView(ViewSharedPtr const& /*rView*/) const override
+                {
+                    return true; // visible on all views
+                }
+
+                virtual ::cppcanvas::CanvasSharedPtr getCanvas() const override
+                {
+                    return mpCanvas;
+                }
+
+                virtual void clear() const override
+                {
+                    // NOOP
+                }
+
+                virtual void clearAll() const override
+                {
+                    // NOOP
+                }
+
+                virtual ::cppcanvas::CustomSpriteSharedPtr createSprite( const ::basegfx::B2DSize& /*rSpriteSizePixel*/,
+                                                                         double                    /*nSpritePrio*/ ) const override
+                {
+                    ENSURE_OR_THROW( false,
+                                      "DummyLayer::createSprite(): This method is not supposed to be called!" );
+                    return ::cppcanvas::CustomSpriteSharedPtr();
+                }
+
+                virtual void setPriority( const basegfx::B1DRange& /*rRange*/ ) override
+                {
+                    OSL_FAIL( "BitmapView::setPriority(): This method is not supposed to be called!" );
+                }
+
+                virtual css::geometry::IntegerSize2D getTranslationOffset() const override
+                {
+                    return geometry::IntegerSize2D(0,0);
+                }
+
+                virtual ::basegfx::B2DHomMatrix getTransformation() const override
+                {
+                    return mpCanvas->getTransformation();
+                }
+
+                virtual ::basegfx::B2DHomMatrix getSpriteTransformation() const override
+                {
+                    OSL_FAIL( "BitmapView::getSpriteTransformation(): This method is not supposed to be called!" );
+                    return ::basegfx::B2DHomMatrix();
+                }
+
+                virtual void setClip( const ::basegfx::B2DPolyPolygon& /*rClip*/ ) override
+                {
+                    OSL_FAIL( "BitmapView::setClip(): This method is not supposed to be called!" );
+                }
+
+                virtual bool resize( const ::basegfx::B2DRange& /*rArea*/ ) override
+                {
+                    OSL_FAIL( "BitmapView::resize(): This method is not supposed to be called!" );
+                    return false;
+                }
+
+            private:
+                ::cppcanvas::CanvasSharedPtr mpCanvas;
+            };
+        }
+
+        bool LayerManager::renderTo( const ::cppcanvas::CanvasSharedPtr& rTargetCanvas ) const
+        {
+            bool bRet( true );
+            ViewLayerSharedPtr pTmpLayer = std::make_shared<DummyLayer>( rTargetCanvas );
+
+            for( const auto& rShape : maAllShapes )
+            {
+                try
+                {
+                    // forward to all shape's addViewLayer method (which
+                    // we request to render the Shape on the new
+                    // ViewLayer. Since we add the shapes in the
+                    // maShapeSet order (which is also the render order),
+                    // this is equivalent to a subsequent render() call)
+                    rShape.first->addViewLayer( pTmpLayer,
+                                                true );
+
+                    // and remove again, this is only temporary
+                    rShape.first->removeViewLayer( pTmpLayer );
+                }
+                catch( uno::Exception& )
+                {
+                    // TODO(E1): Might be superfluous. Nowadays,
+                    // addViewLayer swallows all errors, anyway.
+                    TOOLS_WARN_EXCEPTION( "slideshow", "" );
+                    // at least one shape could not be rendered
+                    bRet = false;
+                }
+            }
+
+            return bRet;
+        }
+
+        void LayerManager::addUpdateArea( ShapeSharedPtr const& rShape )
+        {
+            OSL_ASSERT( !maLayers.empty() ); // always at least background layer
+            ENSURE_OR_THROW( rShape, "LayerManager::addUpdateArea(): invalid Shape" );
+
+            const LayerShapeMap::const_iterator aShapeEntry( maAllShapes.find(rShape) );
+
+            if( aShapeEntry == maAllShapes.end() )
+                return;
+
+            LayerSharedPtr pLayer = aShapeEntry->second.lock();
+            if( pLayer )
+                pLayer->addUpdateRange( rShape->getUpdateArea() );
+        }
+
+        void LayerManager::commitLayerChanges( std::size_t              nCurrLayerIndex,
+                                               LayerShapeMap::const_iterator  aFirstLayerShape,
+                                               const LayerShapeMap::const_iterator&  aEndLayerShapes )
+        {
+            const bool bLayerExists( maLayers.size() > nCurrLayerIndex );
+            if( !bLayerExists )
+                return;
+
+            const LayerSharedPtr& rLayer( maLayers.at(nCurrLayerIndex) );
+            const bool bLayerResized( rLayer->commitBounds() );
+            rLayer->setPriority( basegfx::B1DRange(nCurrLayerIndex,
+                                                   nCurrLayerIndex+1) );
+
+            if( !bLayerResized )
+                return;
+
+            // need to re-render whole layer - start from
+            // clean state
+            rLayer->clearContent();
+
+            // render and remove from update set
+            while( aFirstLayerShape != aEndLayerShapes )
+            {
+                maUpdateShapes.erase(aFirstLayerShape->first);
+                aFirstLayerShape->first->render();
+                ++aFirstLayerShape;
+            }
+        }
+
+        LayerSharedPtr LayerManager::createForegroundLayer() const
+        {
+            OSL_ASSERT( mbActive );
+
+            LayerSharedPtr pLayer( Layer::createLayer() );
+
+            // create ViewLayers for all registered views, and add to
+            // newly created layer.
+            for( const auto& rView : mrViews )
+                pLayer->addView( rView );
+
+            return pLayer;
+        }
+
+        void LayerManager::updateShapeLayers( bool bBackgroundLayerPainted )
+        {
+            OSL_ASSERT( !maLayers.empty() ); // always at least background layer
+            OSL_ASSERT( mbActive );
+
+            // do we need to process shapes?
+            if( !mbLayerAssociationDirty )
+                return;
+
+            if( mbDisableAnimationZOrder )
+            {
+                // layer setup happened elsewhere, is only bg layer
+                // anyway.
+                mbLayerAssociationDirty = false;
+                return;
+            }
+
+            // scan through maAllShapes, and determine shape animation
+            // discontinuities: when a shape that has
+            // isBackgroundDetached() return false follows a shape
+            // with isBackgroundDetached() true, the former and all
+            // following ones must be moved into an own layer.
+
+            // to avoid tons of temporaries, create weak_ptr to Layers
+            // beforehand
+            std::vector< LayerWeakPtr > aWeakLayers(maLayers.begin(),maLayers.end());
+
+            std::size_t                   nCurrLayerIndex(0);
+            bool                          bIsBackgroundLayer(true);
+            bool                          bLastWasBackgroundDetached(false); // last shape sprite state
+            LayerShapeMap::iterator       aCurrShapeEntry( maAllShapes.begin() );
+            LayerShapeMap::iterator       aCurrLayerFirstShapeEntry( maAllShapes.begin() );
+            const LayerShapeMap::iterator aEndShapeEntry ( maAllShapes.end() );
+            while( aCurrShapeEntry != aEndShapeEntry )
+            {
+                const ShapeSharedPtr pCurrShape( aCurrShapeEntry->first );
+                const bool bThisIsBackgroundDetached(
+                    pCurrShape->isBackgroundDetached() );
+
+                if( bLastWasBackgroundDetached &&
+                    !bThisIsBackgroundDetached )
+                {
+                    // discontinuity found - current shape needs to
+                    // get into a new layer
+
+
+                    // commit changes to previous layer
+                    commitLayerChanges(nCurrLayerIndex,
+                                       aCurrLayerFirstShapeEntry,
+                                       aCurrShapeEntry);
+                    aCurrLayerFirstShapeEntry=aCurrShapeEntry;
+                    ++nCurrLayerIndex;
+                    bIsBackgroundLayer = false;
+
+                    if( aWeakLayers.size() <= nCurrLayerIndex ||
+                        notEqual(aWeakLayers.at(nCurrLayerIndex), aCurrShapeEntry->second) )
+                    {
+                        // no more layers left, or shape was not
+                        // member of this layer - create a new one
+                        maLayers.insert( maLayers.begin()+nCurrLayerIndex,
+                                         createForegroundLayer() );
+                        aWeakLayers.insert( aWeakLayers.begin()+nCurrLayerIndex,
+                                            maLayers[nCurrLayerIndex] );
+                    }
+                }
+
+                OSL_ASSERT( maLayers.size() == aWeakLayers.size() );
+
+                // note: using indices here, since vector::insert
+                // above invalidates iterators
+                LayerSharedPtr& rCurrLayer( maLayers.at(nCurrLayerIndex) );
+                LayerWeakPtr& rCurrWeakLayer( aWeakLayers.at(nCurrLayerIndex) );
+                if( notEqual(rCurrWeakLayer, aCurrShapeEntry->second) )
+                {
+                    // mismatch: shape is not contained in current
+                    // layer - move shape to that layer, then.
+                    maLayers.at(nCurrLayerIndex)->setShapeViews(
+                        pCurrShape );
+
+                    // layer got new shape(s), need full repaint, if
+                    // non-sprite shape
+                    if( !bThisIsBackgroundDetached && pCurrShape->isVisible() )
+                    {
+                        LayerSharedPtr pOldLayer( aCurrShapeEntry->second.lock() );
+                        if( pOldLayer )
+                        {
+                            // old layer still valid? then we need to
+                            // repaint former shape area
+                            pOldLayer->addUpdateRange(
+                                pCurrShape->getUpdateArea() );
+                        }
+
+                        // render on new layer (only if not
+                        // explicitly disabled)
+                        if( !(bBackgroundLayerPainted && bIsBackgroundLayer) )
+                            maUpdateShapes.insert( pCurrShape );
+                    }
+
+                    aCurrShapeEntry->second = rCurrWeakLayer;
+                }
+
+                // update layerbounds regardless of the fact that the
+                // shape might be contained in said layer
+                // already. updateBounds() is dumb and needs to
+                // collect all shape bounds.
+                // of course, no need to expand layer bounds for
+                // shapes that reside in sprites themselves.
+                if( !bThisIsBackgroundDetached && !bIsBackgroundLayer )
+                    rCurrLayer->updateBounds( pCurrShape );
+
+                bLastWasBackgroundDetached = bThisIsBackgroundDetached;
+                ++aCurrShapeEntry;
+            }
+
+            // commit very last layer data
+            commitLayerChanges(nCurrLayerIndex,
+                               aCurrLayerFirstShapeEntry,
+                               aCurrShapeEntry);
+
+            // any layers left? Bin them!
+            if( maLayers.size() > nCurrLayerIndex+1 )
+                maLayers.erase(maLayers.begin()+nCurrLayerIndex+1,
+                               maLayers.end());
+
+            mbLayerAssociationDirty = false;
+        }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/layermanager.hxx b/slideshow/source/engine/slide/layermanager.hxx
new file mode 100644
index 000000000..1969f0ccc
--- /dev/null
+++ b/slideshow/source/engine/slide/layermanager.hxx
@@ -0,0 +1,363 @@
+/* -*- 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_SLIDESHOW_SOURCE_ENGINE_SLIDE_LAYERMANAGER_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_LAYERMANAGER_HXX
+
+#include <unoviewcontainer.hxx>
+#include <attributableshape.hxx>
+#include "layer.hxx"
+#include <tools.hxx>
+
+#include <memory>
+#include <map>
+#include <unordered_map>
+#include <vector>
+
+namespace basegfx {
+    class B2DRange;
+}
+
+namespace slideshow::internal
+    {
+        /** A hash map which maps the XShape to the corresponding Shape object.
+
+            Provides quicker lookup than ShapeSet for simple mappings
+         */
+        typedef std::unordered_map<
+              css::uno::Reference< css::drawing::XShape >,
+              ShapeSharedPtr,
+              hash< css::uno::Reference< css::drawing::XShape > >
+            > XShapeToShapeMap;
+
+        /* Definition of Layermanager class */
+
+        /** This class manages all of a slide's layers (and shapes)
+
+            Since layer content changes when animations start or end,
+            the layer manager keeps track of this and also handles
+            starting/stopping of Shape animations. Note that none of
+            the methods actually perform a screen update, this is
+            always delayed until the ActivitiesQueue explicitly
+            performs it.
+
+            @see Layer
+            @see Shape
+         */
+        class LayerManager
+        {
+        public:
+            /** Create a new layer manager for the given page bounds
+
+                @param rViews
+                Views currently registered
+
+                @param bDisableAnimationZOrder
+                When true, all sprite animations run in the
+                foreground.  That is, no extra layers are created, and
+                the slideshow runs potentially faster.
+             */
+            LayerManager( const UnoViewContainer&    rViews,
+                          bool                       bDisableAnimationZOrder );
+
+            /// Forbid copy construction
+            LayerManager(const LayerManager&) = delete;
+
+            /// Forbid copy assignment
+            LayerManager& operator=(const LayerManager&) = delete;
+
+            /** Activate the LayerManager
+
+                This method activates the LayerManager. Prior to
+                activation, this instance will be passive, i.e. won't
+                render anything to any view.
+             */
+            void activate();
+
+            /** Deactivate the LayerManager
+
+                This method deactivates the LayerManager. After
+                deactivation, this instance will be passive,
+                i.e. don't render anything to any view.  Furthermore,
+                if there's currently more than one Layer active, this
+                method also removes all but one.
+             */
+            void deactivate();
+
+            // From ViewEventHandler, forwarded by SlideImpl
+            /// Notify new view added to UnoViewContainer
+            void viewAdded( const UnoViewSharedPtr& rView );
+            /// Notify view removed from UnoViewContainer
+            void viewRemoved( const UnoViewSharedPtr& rView );
+            void viewChanged( const UnoViewSharedPtr& rView );
+            void viewsChanged();
+
+            /** Add the shape to this object
+
+                This method adds a shape to the page.
+             */
+            void addShape( const ShapeSharedPtr& rShape );
+
+            /** Remove shape from this object
+
+                This method removes a shape from the shape.
+             */
+            bool removeShape( const ShapeSharedPtr& rShape );
+
+            /** Lookup a Shape from an XShape model object
+
+                This method looks up the internal shape map for one
+                representing the given XShape.
+
+                @param xShape
+                The XShape object, for which the representing Shape
+                should be looked up.
+             */
+            ShapeSharedPtr lookupShape( const css::uno::Reference< css::drawing::XShape >& xShape ) const;
+
+            /** Query a subset of the given original shape
+
+                This method queries a new (but not necessarily unique)
+                shape, which displays only the given subset of the
+                original one.
+             */
+            AttributableShapeSharedPtr getSubsetShape( const AttributableShapeSharedPtr&    rOrigShape,
+                                                       const DocTreeNode&                   rTreeNode );
+
+            /** Get a map that maps all Shapes with their XShape reference as the key
+             *
+             * @return an unordered map that contains all shapes in the
+             * current page with their XShape reference as the key
+             */
+            const XShapeToShapeMap& getXShapeToShapeMap() const;
+
+            /** Revoke a previously queried subset shape.
+
+                With this method, a previously requested subset shape
+                is revoked again. If the last client revokes a given
+                subset, it will cease to be displayed, and the
+                original shape will again show the subset data.
+
+                @param rOrigShape
+                The shape the subset was created from
+
+                @param rSubsetShape
+                The subset created from rOrigShape
+             */
+            void revokeSubset( const AttributableShapeSharedPtr& rOrigShape,
+                               const AttributableShapeSharedPtr& rSubsetShape );
+
+            /** Notify the LayerManager that the given Shape starts an
+                animation now.
+
+                This method enters animation mode for the Shape on all
+                registered views.
+             */
+            void enterAnimationMode( const AnimatableShapeSharedPtr& rShape );
+
+            /** Notify the LayerManager that the given Shape is no
+                longer animated.
+
+                This methods ends animation mode for the given Shape
+                on all registered views.
+             */
+            void leaveAnimationMode( const AnimatableShapeSharedPtr& rShape );
+
+            /** Notify that a shape needs an update
+
+                This method notifies the layer manager that a shape
+                update is necessary. This is useful if, during
+                animation playback, changes occur to shapes which make
+                an update necessary on an update() call. Otherwise,
+                update() will not render anything, which is not
+                triggered by calling one of the other LayerManager
+                methods.
+
+                @param rShape
+                Shape which needs an update
+             */
+            void notifyShapeUpdate( const ShapeSharedPtr& rShape);
+
+            /** Check whether any update operations  are pending.
+
+                @return true, if this LayerManager has any updates
+                pending, i.e. needs to repaint something for the next
+                frame.
+             */
+            bool isUpdatePending() const;
+
+            /** Update the content
+
+                This method updates the content on all layers on all
+                registered views. It does not issues a
+                View::updateScreen() call on registered views. Please
+                note that this method only takes into account changes
+                to shapes induced directly by calling methods of the
+                LayerManager. If a shape needs an update, because of
+                some external event unknown to the LayerManager (most
+                notably running animations), you have to notify the
+                LayerManager via notifyShapeUpdate().
+
+                @see LayerManager::updateScreen()
+
+                @return whether the update finished successfully.
+            */
+            bool update();
+
+            /** Render the content to given canvas
+
+                This is a one-shot operation, which simply draws all
+                shapes onto the given canvas, without any caching or
+                other fuzz. Don't use that for repeated output onto
+                the same canvas, the View concept is more optimal
+                then.
+
+                @param rTargetCanvas
+                Target canvas to output onto.
+             */
+            bool renderTo( const ::cppcanvas::CanvasSharedPtr& rTargetCanvas ) const;
+
+        private:
+
+            class ShapeComparator
+            {
+            public:
+                bool operator() (const ShapeSharedPtr& rpS1, const ShapeSharedPtr& rpS2 ) const
+                {
+                    return Shape::lessThanShape::compare(rpS1.get(), rpS2.get());
+                }
+            };
+            /** Set of all shapes
+             */
+        private:
+            typedef ::std::map< ShapeSharedPtr, LayerWeakPtr, ShapeComparator > LayerShapeMap;
+
+
+            /// Adds shape area to containing layer's damage area
+            void addUpdateArea( ShapeSharedPtr const& rShape );
+
+            LayerSharedPtr createForegroundLayer() const;
+
+            /** Push changes from updateShapeLayerAssociations() to current layer
+
+                Factored-out method that resizes layer, if necessary,
+                assigns correct layer priority, and repaints contained shapes.
+
+                @param nCurrLayerIndex
+                Index of current layer in maLayers
+
+                @param aFirstLayerShape
+                Valid iterator out of maAllShapes, denoting the first
+                shape from nCurrLayerIndex
+
+                @param aEndLayerShapes
+                Valid iterator or end iterator out of maAllShapes,
+                denoting one-behind-the-last shape of nCurrLayerIndex
+             */
+            void           commitLayerChanges( std::size_t                    nCurrLayerIndex,
+                                               LayerShapeMap::const_iterator  aFirstLayerShape,
+                                               const LayerShapeMap::const_iterator& aEndLayerShapes );
+
+            /** Init Shape layers with background layer.
+             */
+            void          putShape2BackgroundLayer( LayerShapeMap::value_type& rShapeEntry );
+
+            /** Commits any pending layer reorg, due to shapes either
+                entering or leaving animation mode
+
+                @param bBackgroundLayerPainted
+                When true, LayerManager does not render anything on
+                the background layer. Use this, if background has been
+                updated by other means (e.g. slide transition)
+            */
+            void          updateShapeLayers( bool bBackgroundLayerPainted );
+
+            /** Common stuff when adding a shape
+             */
+            void          implAddShape( const ShapeSharedPtr& rShape );
+
+            /** Common stuff when removing a shape
+             */
+            void          implRemoveShape( const ShapeSharedPtr& rShape );
+
+            /** Add or remove views
+
+                Sharing duplicate code from viewAdded and viewRemoved
+                method. The only point of variation at those places
+                are removal vs. adding.
+             */
+            template<typename LayerFunc,
+                     typename ShapeFunc> void manageViews( LayerFunc layerFunc,
+                                                           ShapeFunc shapeFunc );
+
+            bool updateSprites();
+
+            /// Registered views
+            const UnoViewContainer&  mrViews;
+
+            /// All layers of this object. Vector owns the layers
+            ::std::vector< LayerSharedPtr >
+                                     maLayers;
+
+            /** Contains all shapes with their XShape reference as the key
+             */
+            XShapeToShapeMap         maXShapeHash;
+
+            /** Set of shapes this LayerManager own
+
+                Contains the same set of shapes as XShapeHash, but is
+                sorted in z order, for painting and layer
+                association. Set entries are enriched with two flags
+                for buffering animation enable/disable changes, and
+                shape update requests.
+            */
+            LayerShapeMap            maAllShapes;
+
+            /** Set of shapes that have requested an update
+
+                When a shape is member of this set, its maShapes entry
+                has bNeedsUpdate set to true. We maintain this
+                redundant information for faster update processing.
+             */
+            ::std::set< ShapeSharedPtr >
+                                     maUpdateShapes;
+
+            /// Number of shape sprites currently active on this LayerManager
+            sal_Int32                mnActiveSprites;
+
+            /// sal_True, if shapes might need to move to different layer
+            bool                     mbLayerAssociationDirty;
+
+            /// sal_False when deactivated
+            bool                     mbActive;
+
+            /** When true, all sprite animations run in the foreground.  That
+                is, no extra layers are created, and the slideshow runs
+                potentially faster.
+             */
+            bool                     mbDisableAnimationZOrder;
+        };
+
+        typedef ::std::shared_ptr< LayerManager > LayerManagerSharedPtr;
+
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_LAYERMANAGER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/shapemanagerimpl.cxx b/slideshow/source/engine/slide/shapemanagerimpl.cxx
new file mode 100644
index 000000000..1c730970e
--- /dev/null
+++ b/slideshow/source/engine/slide/shapemanagerimpl.cxx
@@ -0,0 +1,426 @@
+/* -*- 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 <comphelper/processfactory.hxx>
+#include <tools/diagnose_ex.h>
+#include <com/sun/star/awt/MouseButton.hpp>
+#include <com/sun/star/awt/SystemPointer.hpp>
+#include <com/sun/star/system/SystemShellExecute.hpp>
+#include <com/sun/star/system/SystemShellExecuteFlags.hpp>
+#include <com/sun/star/system/XSystemShellExecute.hpp>
+#include <svx/ImageMapInfo.hxx>
+
+#include "shapemanagerimpl.hxx"
+
+#include <functional>
+
+using namespace css;
+using namespace css::uno;
+using namespace css::drawing;
+using namespace css::system;
+
+namespace slideshow::internal {
+
+ShapeManagerImpl::ShapeManagerImpl( EventMultiplexer&            rMultiplexer,
+                                    LayerManagerSharedPtr const& rLayerManager,
+                                    CursorManager&               rCursorManager,
+                                    const ShapeEventListenerMap& rGlobalListenersMap,
+                                    const ShapeCursorMap&        rGlobalCursorMap,
+                                    const Reference<XDrawPage>& xDrawPage ):
+    mrMultiplexer(rMultiplexer),
+    mpLayerManager(rLayerManager),
+    mrCursorManager(rCursorManager),
+    mrGlobalListenersMap(rGlobalListenersMap),
+    mrGlobalCursorMap(rGlobalCursorMap),
+    maShapeListenerMap(),
+    maShapeCursorMap(),
+    maHyperlinkShapes(),
+    mbEnabled(false),
+    mxDrawPage(xDrawPage)
+{
+}
+
+void ShapeManagerImpl::activate()
+{
+    if( mbEnabled )
+        return;
+
+    mbEnabled = true;
+
+    // register this handler on EventMultiplexer.
+    // Higher prio (overrides other engine handlers)
+    mrMultiplexer.addMouseMoveHandler( shared_from_this(), 2.0 );
+    mrMultiplexer.addClickHandler( shared_from_this(), 2.0 );
+    mrMultiplexer.addShapeListenerHandler( shared_from_this() );
+
+    // clone listener map
+    for( const auto& rListener : mrGlobalListenersMap )
+        listenerAdded( rListener.first );
+
+    // clone cursor map
+    for( const auto& rListener : mrGlobalCursorMap )
+        cursorChanged( rListener.first, rListener.second );
+
+    if( mpLayerManager )
+        mpLayerManager->activate();
+}
+
+void ShapeManagerImpl::deactivate()
+{
+    if( !mbEnabled )
+        return;
+
+    mbEnabled = false;
+
+    if( mpLayerManager )
+        mpLayerManager->deactivate();
+
+    maShapeListenerMap.clear();
+    maShapeCursorMap.clear();
+
+    mrMultiplexer.removeShapeListenerHandler( shared_from_this() );
+    mrMultiplexer.removeMouseMoveHandler( shared_from_this() );
+    mrMultiplexer.removeClickHandler( shared_from_this() );
+}
+
+void ShapeManagerImpl::dispose()
+{
+    // remove listeners (EventMultiplexer holds shared_ptr on us)
+    deactivate();
+
+    maHyperlinkShapes.clear();
+    maShapeCursorMap.clear();
+    maShapeListenerMap.clear();
+    mpLayerManager.reset();
+}
+
+bool ShapeManagerImpl::handleMousePressed( awt::MouseEvent const& )
+{
+    // not used here
+    return false; // did not handle the event
+}
+
+bool ShapeManagerImpl::handleMouseReleased( awt::MouseEvent const& e )
+{
+    if( !mbEnabled || e.Buttons != awt::MouseButton::LEFT)
+        return false;
+
+    basegfx::B2DPoint const aPosition( e.X, e.Y );
+
+    // first check for hyperlinks, because these have
+    // highest prio:
+    OUString const hyperlink( checkForHyperlink(aPosition) );
+    if( !hyperlink.isEmpty() )
+    {
+        mrMultiplexer.notifyHyperlinkClicked(hyperlink);
+        return true; // event consumed
+    }
+
+    // tdf#74045 Handle ImageMaps
+    OUString const imageMapLink(checkForImageMap(e));
+    if (!imageMapLink.isEmpty())
+    {
+        Reference<XSystemShellExecute> exec(
+            SystemShellExecute::create(comphelper::getProcessComponentContext()));
+        exec->execute(imageMapLink, OUString(), SystemShellExecuteFlags::URIS_ONLY);
+
+        return true;
+    }
+
+    // find matching shape (scan reversely, to coarsely match
+    // paint order)
+    auto aCurrBroadcaster = std::find_if(maShapeListenerMap.rbegin(), maShapeListenerMap.rend(),
+        [&aPosition](const ShapeToListenersMap::value_type& rBroadcaster) {
+            // TODO(F2): Get proper geometry polygon from the
+            // shape, to avoid having areas outside the shape
+            // react on the mouse
+            return rBroadcaster.first->getBounds().isInside( aPosition )
+                && rBroadcaster.first->isVisible();
+        });
+    if (aCurrBroadcaster != maShapeListenerMap.rend())
+    {
+        // shape hit, and shape is visible. Raise
+        // event.
+
+        std::shared_ptr<comphelper::OInterfaceContainerHelper3<css::presentation::XShapeEventListener>> const & pCont =
+            aCurrBroadcaster->second;
+        uno::Reference<drawing::XShape> const xShape(
+            aCurrBroadcaster->first->getXShape() );
+
+        // DON'T do anything with /this/ after this point!
+        pCont->forEach(
+            [&xShape, &e]( const uno::Reference< presentation::XShapeEventListener >& rListener )
+            { return rListener->click( xShape, e ); } );
+
+        return true; // handled this event
+    }
+
+    return false; // did not handle this event
+}
+
+bool ShapeManagerImpl::handleMouseDragged( const awt::MouseEvent& )
+{
+    // not used here
+    return false; // did not handle the event
+}
+
+bool ShapeManagerImpl::handleMouseMoved( const awt::MouseEvent& e )
+{
+    if( !mbEnabled )
+        return false;
+
+    // find hit shape in map
+    const ::basegfx::B2DPoint aPosition( e.X, e.Y );
+    sal_Int16                 nNewCursor(-1);
+
+    if( !checkForHyperlink(aPosition).isEmpty() || !checkForImageMap(e).isEmpty() )
+    {
+        nNewCursor = awt::SystemPointer::REFHAND;
+    }
+    else
+    {
+        // find matching shape (scan reversely, to coarsely match
+        // paint order)
+        auto aCurrCursor = std::find_if(maShapeCursorMap.rbegin(), maShapeCursorMap.rend(),
+            [&aPosition](const ShapeToCursorMap::value_type& rCursor) {
+                // TODO(F2): Get proper geometry polygon from the
+                // shape, to avoid having areas outside the shape
+                // react on the mouse
+                return rCursor.first->getBounds().isInside( aPosition )
+                    && rCursor.first->isVisible();
+            });
+        if (aCurrCursor != maShapeCursorMap.rend())
+        {
+            // shape found, and it's visible. set
+            // requested cursor to shape's
+            nNewCursor = aCurrCursor->second;
+        }
+    }
+
+    if( nNewCursor == -1 )
+        mrCursorManager.resetCursor();
+    else
+        mrCursorManager.requestCursor( nNewCursor );
+
+    return false; // we don't /eat/ this event. Lower prio
+                  // handler should see it, too.
+}
+
+bool ShapeManagerImpl::update()
+{
+    if( mbEnabled && mpLayerManager )
+        return mpLayerManager->update();
+
+    return false;
+}
+
+bool ShapeManagerImpl::needsUpdate() const
+{
+    if( mbEnabled && mpLayerManager )
+        return mpLayerManager->isUpdatePending();
+
+    return false;
+}
+
+void ShapeManagerImpl::enterAnimationMode( const AnimatableShapeSharedPtr& rShape )
+{
+    if( mbEnabled && mpLayerManager )
+        mpLayerManager->enterAnimationMode(rShape);
+}
+
+void ShapeManagerImpl::leaveAnimationMode( const AnimatableShapeSharedPtr& rShape )
+{
+    if( mbEnabled && mpLayerManager )
+        mpLayerManager->leaveAnimationMode(rShape);
+}
+
+void ShapeManagerImpl::notifyShapeUpdate( const ShapeSharedPtr& rShape )
+{
+    if( mbEnabled && mpLayerManager )
+        mpLayerManager->notifyShapeUpdate(rShape);
+}
+
+ShapeSharedPtr ShapeManagerImpl::lookupShape( uno::Reference< drawing::XShape > const & xShape ) const
+{
+    if( mpLayerManager )
+        return mpLayerManager->lookupShape(xShape);
+
+    return ShapeSharedPtr();
+}
+
+const XShapeToShapeMap& ShapeManagerImpl::getXShapeToShapeMap() const
+{
+    assert( mpLayerManager );
+    return mpLayerManager->getXShapeToShapeMap();
+}
+
+void ShapeManagerImpl::addHyperlinkArea( const HyperlinkAreaSharedPtr& rArea )
+{
+    maHyperlinkShapes.insert(rArea);
+}
+
+AttributableShapeSharedPtr ShapeManagerImpl::getSubsetShape( const AttributableShapeSharedPtr& rOrigShape,
+                                                             const DocTreeNode&                rTreeNode )
+{
+    if( mpLayerManager )
+        return mpLayerManager->getSubsetShape(rOrigShape,rTreeNode);
+
+    return AttributableShapeSharedPtr();
+}
+
+void ShapeManagerImpl::revokeSubset( const AttributableShapeSharedPtr& rOrigShape,
+                                     const AttributableShapeSharedPtr& rSubsetShape )
+{
+    if( mpLayerManager )
+        mpLayerManager->revokeSubset(rOrigShape,rSubsetShape);
+}
+
+bool ShapeManagerImpl::listenerAdded(
+    const uno::Reference<drawing::XShape>& xShape )
+{
+    ShapeEventListenerMap::const_iterator aIter = mrGlobalListenersMap.find( xShape );
+    if( aIter == mrGlobalListenersMap.end() )
+    {
+        ENSURE_OR_RETURN_FALSE(false,
+                          "ShapeManagerImpl::listenerAdded(): global "
+                          "shape listener map inconsistency!");
+    }
+
+    // is this one of our shapes? other shapes are ignored.
+    ShapeSharedPtr pShape( lookupShape(xShape) );
+    if( pShape )
+    {
+        maShapeListenerMap.emplace(pShape, aIter->second);
+    }
+
+    return true;
+}
+
+bool ShapeManagerImpl::listenerRemoved( const uno::Reference<drawing::XShape>& xShape )
+{
+    // shape really erased from map? maybe there are other listeners
+    // for the same shape pending...
+    if( mrGlobalListenersMap.find(xShape) == mrGlobalListenersMap.end() )
+    {
+        // is this one of our shapes? other shapes are ignored.
+        ShapeSharedPtr pShape( lookupShape(xShape) );
+        if( pShape )
+            maShapeListenerMap.erase(pShape);
+    }
+
+    return true;
+}
+
+void ShapeManagerImpl::cursorChanged( const uno::Reference<drawing::XShape>&   xShape,
+                                      sal_Int16                                nCursor )
+{
+    ShapeSharedPtr pShape( lookupShape(xShape) );
+
+    // is this one of our shapes? other shapes are ignored.
+    if( !pShape )
+        return;
+
+    if( mrGlobalCursorMap.find(xShape) == mrGlobalCursorMap.end() )
+    {
+        // erased from global map - erase locally, too
+        maShapeCursorMap.erase(pShape);
+    }
+    else
+    {
+        // included in global map - update local one
+        ShapeToCursorMap::iterator aIter;
+        if( (aIter = maShapeCursorMap.find(pShape))
+            == maShapeCursorMap.end() )
+        {
+            maShapeCursorMap.emplace(pShape, nCursor);
+        }
+        else
+        {
+            aIter->second = nCursor;
+        }
+    }
+}
+
+OUString ShapeManagerImpl::checkForHyperlink( basegfx::B2DPoint const& hitPos ) const
+{
+    // find matching region (scan reversely, to coarsely match
+    // paint order): set is ordered by priority
+    AreaSet::const_reverse_iterator iPos( maHyperlinkShapes.rbegin() );
+    AreaSet::const_reverse_iterator const iEnd( maHyperlinkShapes.rend() );
+    for( ; iPos != iEnd; ++iPos )
+    {
+        HyperlinkAreaSharedPtr const& pArea = *iPos;
+
+        HyperlinkArea::HyperlinkRegions const linkRegions(
+            pArea->getHyperlinkRegions() );
+
+        for( std::size_t i = linkRegions.size(); i--; )
+        {
+            basegfx::B2DRange const& region = linkRegions[i].first;
+            if( region.isInside(hitPos) )
+                return linkRegions[i].second;
+        }
+    }
+
+    return OUString();
+}
+
+OUString ShapeManagerImpl::checkForImageMap( awt::MouseEvent const& evt ) const
+{
+    for (sal_Int32 i = 0; i < mxDrawPage->getCount(); i++)
+    {
+        Reference<XShape> xShape(mxDrawPage->getByIndex(i), UNO_QUERY_THROW);
+        SdrObject* pObj = SdrObject::getSdrObjectFromXShape(xShape);
+        if (!pObj)
+            continue;
+        const IMapObject* pIMapObj = SvxIMapInfo::GetHitIMapObject(pObj, Point(evt.X, evt.Y));
+        if (pIMapObj && !pIMapObj->GetURL().isEmpty())
+        {
+            return pIMapObj->GetURL();
+        }
+    }
+    return OUString();
+}
+
+void ShapeManagerImpl::addIntrinsicAnimationHandler( const IntrinsicAnimationEventHandlerSharedPtr& rHandler )
+{
+    maIntrinsicAnimationEventHandlers.add( rHandler );
+}
+
+void ShapeManagerImpl::removeIntrinsicAnimationHandler( const IntrinsicAnimationEventHandlerSharedPtr& rHandler )
+{
+    maIntrinsicAnimationEventHandlers.remove( rHandler );
+}
+
+void ShapeManagerImpl::notifyIntrinsicAnimationsEnabled()
+{
+    maIntrinsicAnimationEventHandlers.applyAll(
+        std::mem_fn(&IntrinsicAnimationEventHandler::enableAnimations));
+}
+
+void ShapeManagerImpl::notifyIntrinsicAnimationsDisabled()
+{
+    maIntrinsicAnimationEventHandlers.applyAll(
+        std::mem_fn(&IntrinsicAnimationEventHandler::disableAnimations));
+}
+
+
+} // namespace slideshow::internal
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/shapemanagerimpl.hxx b/slideshow/source/engine/slide/shapemanagerimpl.hxx
new file mode 100644
index 000000000..20bbe0340
--- /dev/null
+++ b/slideshow/source/engine/slide/shapemanagerimpl.hxx
@@ -0,0 +1,189 @@
+/* -*- 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_SLIDESHOW_SOURCE_ENGINE_SLIDE_SHAPEMANAGERIMPL_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_SHAPEMANAGERIMPL_HXX
+
+#include <com/sun/star/drawing/XDrawPage.hpp>
+#include <com/sun/star/uno/Reference.hxx>
+
+#include <comphelper/interfacecontainer3.hxx>
+#include <shape.hxx>
+#include <subsettableshapemanager.hxx>
+#include <eventmultiplexer.hxx>
+#include "layermanager.hxx"
+#include <viewupdate.hxx>
+#include <shapemaps.hxx>
+#include <cursormanager.hxx>
+#include <hyperlinkarea.hxx>
+#include <listenercontainer.hxx>
+#include <shapelistenereventhandler.hxx>
+#include <mouseeventhandler.hxx>
+
+#include <set>
+#include <map>
+#include <memory>
+
+namespace slideshow::internal {
+
+/** Listener class for shape events
+
+    This helper class registers itself on each view, and
+    broadcasts the XShapeEventListener events. The mouse motion
+    events are needed for setting the shape cursor.
+*/
+class ShapeManagerImpl : public SubsettableShapeManager,
+                         public ShapeListenerEventHandler,
+                         public MouseEventHandler,
+                         public ViewUpdate,
+                         public std::enable_shared_from_this<ShapeManagerImpl>
+{
+public:
+    /** Create a shape event broadcaster
+
+        @param rEventMultiplexer
+        The slideshow-global event source, where this class
+        registers its event handlers.
+    */
+    ShapeManagerImpl( EventMultiplexer&            rMultiplexer,
+                      LayerManagerSharedPtr const& rLayerManager,
+                      CursorManager&               rCursorManager,
+                      const ShapeEventListenerMap& rGlobalListenersMap,
+                      const ShapeCursorMap&        rGlobalCursorMap,
+                      const css::uno::Reference<css::drawing::XDrawPage>& xDrawPage);
+
+    /// Forbid copy construction
+    ShapeManagerImpl(const ShapeManagerImpl&) = delete;
+
+    /// Forbid copy assignment
+    ShapeManagerImpl& operator=(const ShapeManagerImpl&) = delete;
+
+    /** Enables event listening.
+
+        The initial slide content on the background layer
+        is already rendered (e.g. from a previous slide
+        transition).
+     */
+    void activate();
+
+    /** Disables event listening.
+     */
+    void deactivate();
+
+    // Disposable interface
+
+
+    virtual void dispose() override;
+
+private:
+
+    // MouseEventHandler interface
+
+
+    virtual bool handleMousePressed(
+        css::awt::MouseEvent const& evt ) override;
+    virtual bool handleMouseReleased(
+        css::awt::MouseEvent const& evt ) override;
+    virtual bool handleMouseDragged(
+        css::awt::MouseEvent const& evt ) override;
+    virtual bool handleMouseMoved(
+        css::awt::MouseEvent const& evt ) override;
+
+
+    // ViewUpdate interface
+
+
+    virtual bool update() override;
+    virtual bool needsUpdate() const override;
+
+
+    // ShapeManager interface
+
+
+    virtual void enterAnimationMode( const AnimatableShapeSharedPtr& rShape ) override;
+    virtual void leaveAnimationMode( const AnimatableShapeSharedPtr& rShape ) override;
+    virtual void notifyShapeUpdate( const ShapeSharedPtr& rShape ) override;
+    virtual ShapeSharedPtr lookupShape(
+        css::uno::Reference< css::drawing::XShape > const & xShape ) const override;
+    virtual const XShapeToShapeMap& getXShapeToShapeMap() const override;
+    virtual void addHyperlinkArea( const HyperlinkAreaSharedPtr& rArea ) override;
+
+
+    // SubsettableShapeManager interface
+
+
+    virtual AttributableShapeSharedPtr getSubsetShape(
+        const AttributableShapeSharedPtr& rOrigShape,
+        const DocTreeNode&                rTreeNode ) override;
+    virtual void revokeSubset(
+        const AttributableShapeSharedPtr& rOrigShape,
+        const AttributableShapeSharedPtr& rSubsetShape ) override;
+
+    virtual void addIntrinsicAnimationHandler(
+        const IntrinsicAnimationEventHandlerSharedPtr& rHandler ) override;
+    virtual void removeIntrinsicAnimationHandler(
+        const IntrinsicAnimationEventHandlerSharedPtr& rHandler ) override;
+    virtual void notifyIntrinsicAnimationsEnabled() override;
+    virtual void notifyIntrinsicAnimationsDisabled() override;
+
+
+    // ShapeListenerEventHandler
+
+
+    virtual bool listenerAdded( const css::uno::Reference< css::drawing::XShape>& xShape ) override;
+
+    virtual bool listenerRemoved( const css::uno::Reference< css::drawing::XShape>& xShape ) override;
+
+    void cursorChanged( const css::uno::Reference< css::drawing::XShape>&   xShape,
+                              sal_Int16                                     nCursor );
+
+
+    OUString checkForHyperlink( ::basegfx::B2DPoint const& hitPos )const;
+    OUString checkForImageMap( css::awt::MouseEvent const& evt ) const;
+
+
+    typedef std::map<ShapeSharedPtr,
+                     std::shared_ptr< ::comphelper::OInterfaceContainerHelper3<css::presentation::XShapeEventListener> >,
+                     Shape::lessThanShape>        ShapeToListenersMap;
+    typedef std::map<ShapeSharedPtr, sal_Int16,
+                       Shape::lessThanShape>      ShapeToCursorMap;
+    typedef std::set<HyperlinkAreaSharedPtr,
+                     HyperlinkArea::lessThanArea> AreaSet;
+
+    typedef ThreadUnsafeListenerContainer<
+        IntrinsicAnimationEventHandlerSharedPtr,
+        std::vector<IntrinsicAnimationEventHandlerSharedPtr> > ImplIntrinsicAnimationEventHandlers;
+
+    EventMultiplexer&                   mrMultiplexer;
+    LayerManagerSharedPtr               mpLayerManager;
+    CursorManager&                      mrCursorManager;
+    const ShapeEventListenerMap&        mrGlobalListenersMap;
+    const ShapeCursorMap&               mrGlobalCursorMap;
+    ShapeToListenersMap                 maShapeListenerMap;
+    ShapeToCursorMap                    maShapeCursorMap;
+    AreaSet                             maHyperlinkShapes;
+    ImplIntrinsicAnimationEventHandlers maIntrinsicAnimationEventHandlers;
+    bool                                mbEnabled;
+    const css::uno::Reference<css::drawing::XDrawPage> mxDrawPage;
+};
+
+} // namespace presentation::internal
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_SHAPEMANAGERIMPL_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/slideanimations.cxx b/slideshow/source/engine/slide/slideanimations.cxx
new file mode 100644
index 000000000..d433b7af1
--- /dev/null
+++ b/slideshow/source/engine/slide/slideanimations.cxx
@@ -0,0 +1,106 @@
+/* -*- 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/diagnose_ex.h>
+
+#include "slideanimations.hxx"
+#include <animationnodefactory.hxx>
+
+using namespace ::com::sun::star;
+
+namespace slideshow::internal
+{
+        SlideAnimations::SlideAnimations( const SlideShowContext&     rContext,
+                                          const ::basegfx::B2DVector& rSlideSize ) :
+            maContext( rContext ),
+            maSlideSize( rSlideSize ),
+            mpRootNode()
+        {
+            ENSURE_OR_THROW( maContext.mpSubsettableShapeManager,
+                              "SlideAnimations::SlideAnimations(): Invalid SlideShowContext" );
+        }
+
+        SlideAnimations::~SlideAnimations() COVERITY_NOEXCEPT_FALSE
+        {
+            if( !mpRootNode )
+                return;
+
+            SHOW_NODE_TREE( mpRootNode );
+
+            try
+            {
+                mpRootNode->dispose();
+            }
+            catch (uno::Exception &)
+            {
+                TOOLS_WARN_EXCEPTION( "slideshow", "" );
+            }
+        }
+
+        bool SlideAnimations::importAnimations( const uno::Reference< animations::XAnimationNode >& xRootAnimationNode )
+        {
+            mpRootNode = AnimationNodeFactory::createAnimationNode(
+                xRootAnimationNode,
+                maSlideSize,
+                maContext );
+
+            SHOW_NODE_TREE( mpRootNode );
+
+            return static_cast< bool >(mpRootNode);
+        }
+
+        bool SlideAnimations::isAnimated() const
+        {
+            if( !mpRootNode )
+                return false; // no animations there
+
+            // query root node about pending animations
+            return mpRootNode->hasPendingAnimation();
+        }
+
+        bool SlideAnimations::start()
+        {
+            if( !mpRootNode )
+                return false; // no animations there
+
+            // init all nodes
+            if( !mpRootNode->init() )
+                return false;
+
+            // resolve root node
+            if( !mpRootNode->resolve() )
+                return false;
+
+            return true;
+        }
+
+        void SlideAnimations::end()
+        {
+            if( !mpRootNode )
+                return; // no animations there
+
+            // end root node
+            mpRootNode->deactivate();
+            mpRootNode->end();
+        }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/slideanimations.hxx b/slideshow/source/engine/slide/slideanimations.hxx
new file mode 100644
index 000000000..3ebc1b21b
--- /dev/null
+++ b/slideshow/source/engine/slide/slideanimations.hxx
@@ -0,0 +1,107 @@
+/* -*- 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_SLIDESHOW_SOURCE_ENGINE_SLIDE_SLIDEANIMATIONS_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_SLIDEANIMATIONS_HXX
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <basegfx/vector/b2dvector.hxx>
+
+#include <slideshowcontext.hxx>
+#include <animationnode.hxx>
+
+namespace com::sun::star::animations { class XAnimationNode; }
+
+
+/* Definition of SlideAnimations class */
+
+namespace slideshow::internal
+    {
+        /** This class generates and manages all animations of a slide.
+
+            Provided with the root animation node, this class imports
+            the effect information and builds the event tree for all
+            of the slide's animations.
+         */
+        class SlideAnimations
+        {
+        public:
+            /** Create an animation generator.
+
+                @param rContext
+                Slide show context, passing on common parameters
+             */
+            SlideAnimations( const SlideShowContext&     rContext,
+                             const ::basegfx::B2DVector& rSlideSize );
+            ~SlideAnimations() COVERITY_NOEXCEPT_FALSE;
+
+            /** Import animations from a SMIL root animation node.
+
+                This method might take some time, depending on the
+                complexity of the SMIL animation network to be
+                imported.
+
+                @param xRootAnimationNode
+                Root animation node for the effects to be
+                generated. This is typically obtained from the
+                XDrawPage's XAnimationNodeSupplier.
+
+             */
+            bool importAnimations( const css::uno::Reference< css::animations::XAnimationNode >&   xRootAnimationNode );
+
+            /** Check, whether imported animations actually contain
+                any effects.
+
+                @return true, if there are actual animations in the
+                imported node tree.
+             */
+            bool isAnimated() const;
+
+            /** Start the animations.
+
+                This method creates the network of events and
+                activities for all animations. The events and
+                activities are inserted into the constructor-provided
+                queues. These queues are not explicitly cleared, if
+                you rely on this object's effects to run without
+                interference, you should clear the queues by yourself.
+
+                @return true, if all events have been successfully
+                created.
+             */
+            bool start();
+
+            /** End all animations.
+
+                This method force-ends all animations. If a slide end
+                event has been registered, that is fired, too.
+             */
+            void end();
+
+        private:
+            SlideShowContext         maContext;
+            const basegfx::B2DVector maSlideSize;
+            AnimationNodeSharedPtr   mpRootNode;
+        };
+
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_SLIDEANIMATIONS_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/slideimpl.cxx b/slideshow/source/engine/slide/slideimpl.cxx
new file mode 100644
index 000000000..033af8756
--- /dev/null
+++ b/slideshow/source/engine/slide/slideimpl.cxx
@@ -0,0 +1,1130 @@
+/* -*- 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 <osl/diagnose.hxx>
+#include <tools/diagnose_ex.h>
+#include <cppcanvas/basegfxfactory.hxx>
+
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/point/b2dpoint.hxx>
+
+#include <com/sun/star/awt/SystemPointer.hpp>
+#include <com/sun/star/drawing/XMasterPageTarget.hpp>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/presentation/ParagraphTarget.hpp>
+#include <com/sun/star/presentation/EffectNodeType.hpp>
+
+#include <slide.hxx>
+#include <slideshowcontext.hxx>
+#include "slideanimations.hxx"
+#include <doctreenode.hxx>
+#include <screenupdater.hxx>
+#include <cursormanager.hxx>
+#include <shapeimporter.hxx>
+#include <slideshowexceptions.hxx>
+#include <eventqueue.hxx>
+#include <activitiesqueue.hxx>
+#include "layermanager.hxx"
+#include "shapemanagerimpl.hxx"
+#include <usereventqueue.hxx>
+#include "userpaintoverlay.hxx"
+#include "targetpropertiescreator.hxx"
+#include <tools.hxx>
+#include <box2dtools.hxx>
+#include <vcl/graphicfilter.hxx>
+#include <svx/svdograf.hxx>
+
+using namespace ::com::sun::star;
+
+
+namespace slideshow::internal
+{
+namespace
+{
+
+class SlideImpl : public Slide,
+                  public CursorManager,
+                  public ViewEventHandler,
+                  public ::osl::DebugBase<SlideImpl>
+{
+public:
+    SlideImpl( const uno::Reference<drawing::XDrawPage>&         xDrawPage,
+               const uno::Reference<drawing::XDrawPagesSupplier>&    xDrawPages,
+               const uno::Reference<animations::XAnimationNode>& xRootNode,
+               EventQueue&                                       rEventQueue,
+               EventMultiplexer&                                 rEventMultiplexer,
+               ScreenUpdater&                                    rScreenUpdater,
+               ActivitiesQueue&                                  rActivitiesQueue,
+               UserEventQueue&                                   rUserEventQueue,
+               CursorManager&                                    rCursorManager,
+               MediaFileManager&                                 rMediaFileManager,
+               const UnoViewContainer&                           rViewContainer,
+               const uno::Reference<uno::XComponentContext>&     xContext,
+               const ShapeEventListenerMap&                      rShapeListenerMap,
+               const ShapeCursorMap&                             rShapeCursorMap,
+               PolyPolygonVector&&                               rPolyPolygonVector,
+               RGBColor const&                                   rUserPaintColor,
+               double                                            dUserPaintStrokeWidth,
+               bool                                              bUserPaintEnabled,
+               bool                                              bIntrinsicAnimationsAllowed,
+               bool                                              bDisableAnimationZOrder );
+
+    virtual ~SlideImpl() override;
+
+
+    // Slide interface
+
+
+    virtual void prefetch() override;
+    virtual void show( bool ) override;
+    virtual void hide() override;
+
+    virtual basegfx::B2ISize getSlideSize() const override;
+    virtual uno::Reference<drawing::XDrawPage > getXDrawPage() const override;
+    virtual uno::Reference<animations::XAnimationNode> getXAnimationNode() const override;
+    virtual PolyPolygonVector getPolygons() override;
+    virtual void drawPolygons() const override;
+    virtual bool isPaintOverlayActive() const override;
+    virtual void enablePaintOverlay() override;
+    virtual void update_settings( bool bUserPaintEnabled, RGBColor const& aUserPaintColor, double dUserPaintStrokeWidth ) override;
+
+
+    // TODO(F2): Rework SlideBitmap to no longer be based on XBitmap,
+    // but on canvas-independent basegfx bitmaps
+    virtual SlideBitmapSharedPtr getCurrentSlideBitmap( const UnoViewSharedPtr& rView ) const override;
+
+
+private:
+    // ViewEventHandler
+    virtual void viewAdded( const UnoViewSharedPtr& rView ) override;
+    virtual void viewRemoved( const UnoViewSharedPtr& rView ) override;
+    virtual void viewChanged( const UnoViewSharedPtr& rView ) override;
+    virtual void viewsChanged() override;
+
+    // CursorManager
+    virtual bool requestCursor( sal_Int16 nCursorShape ) override;
+    virtual void resetCursor() override;
+
+    void activatePaintOverlay();
+    void deactivatePaintOverlay();
+
+    /** Query whether the slide has animations at all
+
+        If the slide doesn't have animations, show() displays
+        only static content. If an event is registered with
+        registerSlideEndEvent(), this event will be
+        immediately activated at the end of the show() method.
+
+        @return true, if this slide has animations, false
+        otherwise
+    */
+    bool isAnimated();
+
+    /// Set all Shapes to their initial attributes for slideshow
+    bool applyInitialShapeAttributes( const css::uno::Reference< css::animations::XAnimationNode >& xRootAnimationNode );
+
+    /// Set shapes to attributes corresponding to initial or final state of slide
+    void applyShapeAttributes(
+        const css::uno::Reference< css::animations::XAnimationNode >& xRootAnimationNode,
+        bool bInitial) const;
+
+    /// Renders current slide content to bitmap
+    SlideBitmapSharedPtr createCurrentSlideBitmap(
+        const UnoViewSharedPtr& rView,
+        ::basegfx::B2ISize const & rSlideSize ) const;
+
+    /// Prefetch all shapes (not the animations)
+    bool loadShapes();
+
+    /// Retrieve slide size from XDrawPage
+    basegfx::B2ISize getSlideSizeImpl() const;
+
+    /// Prefetch show, but don't call applyInitialShapeAttributes()
+    bool implPrefetchShow();
+
+    /// Add Polygons to the member maPolygons
+    void addPolygons(const PolyPolygonVector& rPolygons);
+
+    // Types
+    // =====
+
+    enum SlideAnimationState
+    {
+        CONSTRUCTING_STATE=0,
+        INITIAL_STATE=1,
+        SHOWING_STATE=2,
+        FINAL_STATE=3,
+        SlideAnimationState_NUM_ENTRIES=4
+    };
+
+    typedef std::vector< SlideBitmapSharedPtr > VectorOfSlideBitmaps;
+    /** Vector of slide bitmaps.
+
+        Since the bitmap content is sensitive to animation
+        effects, we have an inner vector containing a distinct
+        bitmap for each of the SlideAnimationStates.
+    */
+    typedef ::std::vector< std::pair< UnoViewSharedPtr,
+                                      VectorOfSlideBitmaps > > VectorOfVectorOfSlideBitmaps;
+
+
+    // Member variables
+    // ================
+
+    /// The page model object
+    uno::Reference< drawing::XDrawPage >                mxDrawPage;
+    uno::Reference< drawing::XDrawPagesSupplier >       mxDrawPagesSupplier;
+    uno::Reference< animations::XAnimationNode >        mxRootNode;
+
+    LayerManagerSharedPtr                               mpLayerManager;
+    std::shared_ptr<ShapeManagerImpl>                 mpShapeManager;
+    std::shared_ptr<SubsettableShapeManager>          mpSubsettableShapeManager;
+    box2d::utils::Box2DWorldSharedPtr                   mpBox2DWorld;
+
+    /// Contains common objects needed throughout the slideshow
+    SlideShowContext                                    maContext;
+
+    /// parent cursor manager
+    CursorManager&                                      mrCursorManager;
+
+    /// Handles the animation and event generation for us
+    SlideAnimations                                     maAnimations;
+    PolyPolygonVector                                   maPolygons;
+
+    RGBColor                                            maUserPaintColor;
+    double                                              mdUserPaintStrokeWidth;
+    UserPaintOverlaySharedPtr                           mpPaintOverlay;
+
+    /// Bitmaps with slide content at various states
+    mutable VectorOfVectorOfSlideBitmaps                maSlideBitmaps;
+
+    SlideAnimationState                                 meAnimationState;
+
+    const basegfx::B2ISize                              maSlideSize;
+
+    sal_Int16                                           mnCurrentCursor;
+
+    /// True, when intrinsic shape animations are allowed
+    bool                                                mbIntrinsicAnimationsAllowed;
+
+    /// True, when user paint overlay is enabled
+    bool                                                mbUserPaintOverlayEnabled;
+
+    /// True, if initial load of all page shapes succeeded
+    bool                                                mbShapesLoaded;
+
+    /// True, if initial load of all animation info succeeded
+    bool                                                mbShowLoaded;
+
+    /** True, if this slide is not static.
+
+        If this slide has animated content, this variable will
+        be true, and false otherwise.
+    */
+    bool                                                mbHaveAnimations;
+
+    /** True, if this slide has a main animation sequence.
+
+        If this slide has animation content, which in turn has
+        a main animation sequence (which must be fully run
+        before EventMultiplexer::notifySlideAnimationsEnd() is
+        called), this member is true.
+    */
+    bool                                                mbMainSequenceFound;
+
+    /// When true, show() was called. Slide hidden otherwise.
+    bool                                                mbActive;
+
+    /// When true, enablePaintOverlay was called and mbUserPaintOverlay = true
+    bool                                                mbPaintOverlayActive;
+
+    /// When true, final state attributes are already applied to shapes
+    bool                                                mbFinalStateApplied;
+};
+
+
+void slideRenderer( SlideImpl const * pSlide, const UnoViewSharedPtr& rView )
+{
+    // fully clear view content to background color
+    rView->clearAll();
+
+    SlideBitmapSharedPtr         pBitmap( pSlide->getCurrentSlideBitmap( rView ) );
+    ::cppcanvas::CanvasSharedPtr pCanvas( rView->getCanvas() );
+
+    const ::basegfx::B2DHomMatrix   aViewTransform( rView->getTransformation() );
+    const ::basegfx::B2DPoint       aOutPosPixel( aViewTransform * ::basegfx::B2DPoint() );
+
+    // setup a canvas with device coordinate space, the slide
+    // bitmap already has the correct dimension.
+    ::cppcanvas::CanvasSharedPtr pDevicePixelCanvas( pCanvas->clone() );
+    pDevicePixelCanvas->setTransformation( ::basegfx::B2DHomMatrix() );
+
+    // render at given output position
+    pBitmap->move( aOutPosPixel );
+
+    // clear clip (might have been changed, e.g. from comb
+    // transition)
+    pBitmap->clip( ::basegfx::B2DPolyPolygon() );
+    pBitmap->draw( pDevicePixelCanvas );
+}
+
+
+SlideImpl::SlideImpl( const uno::Reference< drawing::XDrawPage >&           xDrawPage,
+                      const uno::Reference<drawing::XDrawPagesSupplier>&    xDrawPages,
+                      const uno::Reference< animations::XAnimationNode >&   xRootNode,
+                      EventQueue&                                           rEventQueue,
+                      EventMultiplexer&                                     rEventMultiplexer,
+                      ScreenUpdater&                                        rScreenUpdater,
+                      ActivitiesQueue&                                      rActivitiesQueue,
+                      UserEventQueue&                                       rUserEventQueue,
+                      CursorManager&                                        rCursorManager,
+                      MediaFileManager&                                     rMediaFileManager,
+                      const UnoViewContainer&                               rViewContainer,
+                      const uno::Reference< uno::XComponentContext >&       xComponentContext,
+                      const ShapeEventListenerMap&                          rShapeListenerMap,
+                      const ShapeCursorMap&                                 rShapeCursorMap,
+                      PolyPolygonVector&&                                   rPolyPolygonVector,
+                      RGBColor const&                                       aUserPaintColor,
+                      double                                                dUserPaintStrokeWidth,
+                      bool                                                  bUserPaintEnabled,
+                      bool                                                  bIntrinsicAnimationsAllowed,
+                      bool                                                  bDisableAnimationZOrder ) :
+    mxDrawPage( xDrawPage ),
+    mxDrawPagesSupplier( xDrawPages ),
+    mxRootNode( xRootNode ),
+    mpLayerManager( std::make_shared<LayerManager>(
+                        rViewContainer,
+                        bDisableAnimationZOrder) ),
+    mpShapeManager( std::make_shared<ShapeManagerImpl>(
+                        rEventMultiplexer,
+                        mpLayerManager,
+                        rCursorManager,
+                        rShapeListenerMap,
+                        rShapeCursorMap,
+                        xDrawPage)),
+    mpSubsettableShapeManager( mpShapeManager ),
+    mpBox2DWorld( std::make_shared<box2d::utils::box2DWorld>(
+                        basegfx::B2DSize( getSlideSizeImpl() ) ) ),
+    maContext( mpSubsettableShapeManager,
+               rEventQueue,
+               rEventMultiplexer,
+               rScreenUpdater,
+               rActivitiesQueue,
+               rUserEventQueue,
+               *this,
+               rMediaFileManager,
+               rViewContainer,
+               xComponentContext,
+               mpBox2DWorld ),
+    mrCursorManager( rCursorManager ),
+    maAnimations( maContext,
+                  basegfx::B2DSize( getSlideSizeImpl() ) ),
+    maPolygons(std::move(rPolyPolygonVector)),
+    maUserPaintColor(aUserPaintColor),
+    mdUserPaintStrokeWidth(dUserPaintStrokeWidth),
+    mpPaintOverlay(),
+    maSlideBitmaps(),
+    meAnimationState( CONSTRUCTING_STATE ),
+    maSlideSize(getSlideSizeImpl()),
+    mnCurrentCursor( awt::SystemPointer::ARROW ),
+    mbIntrinsicAnimationsAllowed( bIntrinsicAnimationsAllowed ),
+    mbUserPaintOverlayEnabled(bUserPaintEnabled),
+    mbShapesLoaded( false ),
+    mbShowLoaded( false ),
+    mbHaveAnimations( false ),
+    mbMainSequenceFound( false ),
+    mbActive( false ),
+    mbPaintOverlayActive( false ),
+    mbFinalStateApplied( false )
+{
+    // clone already existing views for slide bitmaps
+    for( const auto& rView : rViewContainer )
+        viewAdded( rView );
+
+    // register screen update (LayerManager needs to signal pending
+    // updates)
+    maContext.mrScreenUpdater.addViewUpdate(mpShapeManager);
+}
+
+void SlideImpl::update_settings( bool bUserPaintEnabled, RGBColor const& aUserPaintColor, double dUserPaintStrokeWidth )
+{
+    maUserPaintColor = aUserPaintColor;
+    mdUserPaintStrokeWidth = dUserPaintStrokeWidth;
+    mbUserPaintOverlayEnabled = bUserPaintEnabled;
+}
+
+SlideImpl::~SlideImpl()
+{
+    if( mpShapeManager )
+    {
+        maContext.mrScreenUpdater.removeViewUpdate(mpShapeManager);
+        mpShapeManager->dispose();
+
+        // TODO(Q3): Make sure LayerManager (and thus Shapes) dies
+        // first, because SlideShowContext has SubsettableShapeManager
+        // as reference member.
+        mpLayerManager.reset();
+    }
+}
+
+void SlideImpl::prefetch()
+{
+    if( !mxRootNode.is() )
+        return;
+
+    // Try to prefetch all graphics from the page. This will be done
+    // in threads to be more efficient than loading them on-demand one by one.
+    std::vector<Graphic*> graphics;
+    for (sal_Int32 i = 0; i < mxDrawPage->getCount(); i++)
+    {
+        com::sun::star::uno::Reference<com::sun::star::drawing::XShape> xShape(mxDrawPage->getByIndex(i), com::sun::star::uno::UNO_QUERY_THROW);
+        SdrObject* pObj = SdrObject::getSdrObjectFromXShape(xShape);
+        if (!pObj)
+            continue;
+        if( SdrGrafObj* grafObj = dynamic_cast<SdrGrafObj*>(pObj))
+            if( !grafObj->GetGraphic().isAvailable())
+                graphics.push_back( const_cast<Graphic*>(&grafObj->GetGraphic()));
+    }
+    if(graphics.size() > 1) // threading does not help with loading just one
+        GraphicFilter::GetGraphicFilter().MakeGraphicsAvailableThreaded( graphics );
+
+    applyInitialShapeAttributes(mxRootNode);
+}
+
+void SlideImpl::show( bool bSlideBackgroundPainted )
+{
+    if( mbActive )
+        return; // already active
+
+    if( !mpShapeManager || !mpLayerManager )
+        return; // disposed
+
+    // set initial shape attributes (e.g. hide shapes that have
+    // 'appear' effect set)
+    if( !applyInitialShapeAttributes(mxRootNode) )
+        return;
+
+    // activate and take over view - clears view, if necessary
+    mbActive = true;
+    requestCursor( mnCurrentCursor );
+
+    // enable shape management & event broadcasting for shapes of this
+    // slide. Also enables LayerManager to record updates. Currently,
+    // never let LayerManager render initial slide content, use
+    // buffered slide bitmaps instead.
+    mpShapeManager->activate();
+
+
+    // render slide to screen, if requested
+    if( !bSlideBackgroundPainted )
+    {
+        for( const auto& rContext : maContext.mrViewContainer )
+            slideRenderer( this, rContext );
+
+        maContext.mrScreenUpdater.notifyUpdate();
+    }
+
+
+    // fire up animations
+    const bool bIsAnimated( isAnimated() );
+    if( bIsAnimated )
+        maAnimations.start(); // feeds initial events into queue
+
+    // NOTE: this looks slightly weird, but is indeed correct:
+    // as isAnimated() might return false, _although_ there is
+    // a main sequence (because the animation nodes don't
+    // contain any executable effects), we gotta check both
+    // conditions here.
+    if( !bIsAnimated || !mbMainSequenceFound )
+    {
+        // manually trigger a slide animation end event (we don't have
+        // animations at all, or we don't have a main animation
+        // sequence, but if we had, it'd end now). Note that having
+        // animations alone does not matter here, as only main
+        // sequence animations prevents showing the next slide on
+        // nextEvent().
+        maContext.mrEventMultiplexer.notifySlideAnimationsEnd();
+    }
+
+    // enable shape-intrinsic animations (drawing layer animations or
+    // GIF animations)
+    if( mbIntrinsicAnimationsAllowed )
+        mpSubsettableShapeManager->notifyIntrinsicAnimationsEnabled();
+
+    // enable paint overlay, if maUserPaintColor is valid
+    activatePaintOverlay();
+
+
+    // from now on, animations might be showing
+    meAnimationState = SHOWING_STATE;
+}
+
+void SlideImpl::hide()
+{
+    if( !mbActive || !mpShapeManager )
+        return; // already hidden/disposed
+
+
+    // from now on, all animations are stopped
+    meAnimationState = FINAL_STATE;
+
+
+    // disable user paint overlay under all circumstances,
+    // this slide now ceases to be active.
+    deactivatePaintOverlay();
+
+
+    // switch off all shape-intrinsic animations.
+    mpSubsettableShapeManager->notifyIntrinsicAnimationsDisabled();
+
+    // force-end all SMIL animations, too
+    maAnimations.end();
+
+
+    // disable shape management & event broadcasting for shapes of this
+    // slide. Also disables LayerManager.
+    mpShapeManager->deactivate();
+
+    // vanish from view
+    resetCursor();
+    mbActive = false;
+}
+
+basegfx::B2ISize SlideImpl::getSlideSize() const
+{
+    return maSlideSize;
+}
+
+uno::Reference<drawing::XDrawPage > SlideImpl::getXDrawPage() const
+{
+    return mxDrawPage;
+}
+
+uno::Reference<animations::XAnimationNode> SlideImpl::getXAnimationNode() const
+{
+    return mxRootNode;
+}
+
+PolyPolygonVector SlideImpl::getPolygons()
+{
+    if(mbPaintOverlayActive)
+        maPolygons = mpPaintOverlay->getPolygons();
+    return maPolygons;
+}
+
+SlideBitmapSharedPtr SlideImpl::getCurrentSlideBitmap( const UnoViewSharedPtr& rView ) const
+{
+    // search corresponding entry in maSlideBitmaps (which
+    // contains the views as the key)
+    VectorOfVectorOfSlideBitmaps::iterator       aIter;
+    const VectorOfVectorOfSlideBitmaps::iterator aEnd( maSlideBitmaps.end() );
+    if( (aIter=std::find_if( maSlideBitmaps.begin(),
+                             aEnd,
+                             [&rView]
+                             ( const VectorOfVectorOfSlideBitmaps::value_type& cp )
+                             { return rView == cp.first; } ) ) == aEnd )
+    {
+        // corresponding view not found - maybe view was not
+        // added to Slide?
+        ENSURE_OR_THROW( false,
+                          "SlideImpl::getInitialSlideBitmap(): view does not "
+                          "match any of the added ones" );
+    }
+
+    // ensure that the show is loaded
+    if( !mbShowLoaded )
+    {
+        // only prefetch and init shapes when not done already
+        // (otherwise, at least applyInitialShapeAttributes() will be
+        // called twice for initial slide rendering). Furthermore,
+        // applyInitialShapeAttributes() _always_ performs
+        // initializations, which would be highly unwanted during a
+        // running show. OTOH, a slide whose mbShowLoaded is false is
+        // guaranteed not be running a show.
+
+        // set initial shape attributes (e.g. hide 'appear' effect
+        // shapes)
+        if( !const_cast<SlideImpl*>(this)->applyInitialShapeAttributes( mxRootNode ) )
+            ENSURE_OR_THROW(false,
+                             "SlideImpl::getCurrentSlideBitmap(): Cannot "
+                             "apply initial attributes");
+    }
+
+    SlideBitmapSharedPtr&     rBitmap( aIter->second.at( meAnimationState ));
+    const ::basegfx::B2ISize& rSlideSize(
+        getSlideSizePixel( ::basegfx::B2DSize( getSlideSize() ),
+                           rView ));
+
+    // is the bitmap valid (actually existent, and of correct
+    // size)?
+    if( !rBitmap || rBitmap->getSize() != rSlideSize )
+    {
+        // no bitmap there yet, or wrong size - create one
+        rBitmap = createCurrentSlideBitmap(rView, rSlideSize);
+    }
+
+    return rBitmap;
+}
+
+
+// private methods
+
+
+void SlideImpl::viewAdded( const UnoViewSharedPtr& rView )
+{
+    maSlideBitmaps.emplace_back( rView,
+                        VectorOfSlideBitmaps(SlideAnimationState_NUM_ENTRIES) );
+
+    if( mpLayerManager )
+        mpLayerManager->viewAdded( rView );
+}
+
+void SlideImpl::viewRemoved( const UnoViewSharedPtr& rView )
+{
+    if( mpLayerManager )
+        mpLayerManager->viewRemoved( rView );
+
+    const VectorOfVectorOfSlideBitmaps::iterator aEnd( maSlideBitmaps.end() );
+    maSlideBitmaps.erase(
+        std::remove_if( maSlideBitmaps.begin(),
+                        aEnd,
+                        [&rView]
+                        ( const VectorOfVectorOfSlideBitmaps::value_type& cp )
+                        { return rView == cp.first; } ),
+                        aEnd );
+}
+
+void SlideImpl::viewChanged( const UnoViewSharedPtr& rView )
+{
+    // nothing to do for the Slide - getCurrentSlideBitmap() lazily
+    // handles bitmap resizes
+    if( mbActive && mpLayerManager )
+        mpLayerManager->viewChanged(rView);
+}
+
+void SlideImpl::viewsChanged()
+{
+    // nothing to do for the Slide - getCurrentSlideBitmap() lazily
+    // handles bitmap resizes
+    if( mbActive && mpLayerManager )
+        mpLayerManager->viewsChanged();
+}
+
+bool SlideImpl::requestCursor( sal_Int16 nCursorShape )
+{
+    mnCurrentCursor = nCursorShape;
+    return mrCursorManager.requestCursor(mnCurrentCursor);
+}
+
+void SlideImpl::resetCursor()
+{
+    mnCurrentCursor = awt::SystemPointer::ARROW;
+    mrCursorManager.resetCursor();
+}
+
+bool SlideImpl::isAnimated()
+{
+    // prefetch, but don't apply initial shape attributes
+    if( !implPrefetchShow() )
+        return false;
+
+    return mbHaveAnimations && maAnimations.isAnimated();
+}
+
+SlideBitmapSharedPtr SlideImpl::createCurrentSlideBitmap( const UnoViewSharedPtr&   rView,
+                                                          const ::basegfx::B2ISize& rBmpSize ) const
+{
+    ENSURE_OR_THROW( rView && rView->getCanvas(),
+                      "SlideImpl::createCurrentSlideBitmap(): Invalid view" );
+    ENSURE_OR_THROW( mpLayerManager,
+                      "SlideImpl::createCurrentSlideBitmap(): Invalid layer manager" );
+    ENSURE_OR_THROW( mbShowLoaded,
+                      "SlideImpl::createCurrentSlideBitmap(): No show loaded" );
+
+    // tdf#96083 ensure end state settings are applied to shapes once when bitmap gets re-rendered
+    // in that state
+    if(!mbFinalStateApplied && FINAL_STATE == meAnimationState && mxRootNode.is())
+    {
+        const_cast< SlideImpl* >(this)->mbFinalStateApplied = true;
+        applyShapeAttributes(mxRootNode, false);
+    }
+
+    ::cppcanvas::CanvasSharedPtr pCanvas( rView->getCanvas() );
+
+    // create a bitmap of appropriate size
+    ::cppcanvas::BitmapSharedPtr pBitmap(
+        ::cppcanvas::BaseGfxFactory::createBitmap(
+            pCanvas,
+            rBmpSize ) );
+
+    ENSURE_OR_THROW( pBitmap,
+                      "SlideImpl::createCurrentSlideBitmap(): Cannot create page bitmap" );
+
+    ::cppcanvas::BitmapCanvasSharedPtr pBitmapCanvas( pBitmap->getBitmapCanvas() );
+
+    ENSURE_OR_THROW( pBitmapCanvas,
+                      "SlideImpl::createCurrentSlideBitmap(): Cannot create page bitmap canvas" );
+
+    // apply linear part of destination canvas transformation (linear means in this context:
+    // transformation without any translational components)
+    ::basegfx::B2DHomMatrix aLinearTransform( rView->getTransformation() );
+    aLinearTransform.set( 0, 2, 0.0 );
+    aLinearTransform.set( 1, 2, 0.0 );
+    pBitmapCanvas->setTransformation( aLinearTransform );
+
+    // output all shapes to bitmap
+    initSlideBackground( pBitmapCanvas, rBmpSize );
+    mpLayerManager->renderTo( pBitmapCanvas );
+
+    return std::make_shared<SlideBitmap>( pBitmap );
+}
+
+class MainSequenceSearcher
+{
+public:
+    MainSequenceSearcher()
+    {
+        maSearchKey.Name = "node-type";
+        maSearchKey.Value <<= presentation::EffectNodeType::MAIN_SEQUENCE;
+    }
+
+    void operator()( const uno::Reference< animations::XAnimationNode >& xChildNode )
+    {
+        uno::Sequence< beans::NamedValue > aUserData( xChildNode->getUserData() );
+
+        if( findNamedValue( aUserData, maSearchKey ) )
+        {
+            maMainSequence = xChildNode;
+        }
+    }
+
+    const uno::Reference< animations::XAnimationNode >& getMainSequence() const
+    {
+        return maMainSequence;
+    }
+
+private:
+    beans::NamedValue                               maSearchKey;
+    uno::Reference< animations::XAnimationNode >    maMainSequence;
+};
+
+bool SlideImpl::implPrefetchShow()
+{
+    if( mbShowLoaded )
+        return true;
+
+    ENSURE_OR_RETURN_FALSE( mxDrawPage.is(),
+                       "SlideImpl::implPrefetchShow(): Invalid draw page" );
+    ENSURE_OR_RETURN_FALSE( mpLayerManager,
+                       "SlideImpl::implPrefetchShow(): Invalid layer manager" );
+
+    // fetch desired page content
+    // ==========================
+
+    if( !loadShapes() )
+        return false;
+
+    // New animations framework: import the shape effect info
+    // ======================================================
+
+    try
+    {
+        if( mxRootNode.is() )
+        {
+            if( !maAnimations.importAnimations( mxRootNode ) )
+            {
+                OSL_FAIL( "SlideImpl::implPrefetchShow(): have animation nodes, "
+                            "but import animations failed." );
+
+                // could not import animation framework,
+                // _although_ some animation nodes are there -
+                // this is an error (not finding animations at
+                // all is okay - might be a static slide)
+                return false;
+            }
+
+            // now check whether we've got a main sequence (if
+            // not, we must manually call
+            // EventMultiplexer::notifySlideAnimationsEnd()
+            // above, as e.g. interactive sequences alone
+            // don't block nextEvent() from issuing the next
+            // slide)
+            MainSequenceSearcher aSearcher;
+            if( for_each_childNode( mxRootNode, aSearcher ) )
+                mbMainSequenceFound = aSearcher.getMainSequence().is();
+
+            // import successfully done
+            mbHaveAnimations = true;
+        }
+    }
+    catch( uno::RuntimeException& )
+    {
+        throw;
+    }
+    catch( uno::Exception& )
+    {
+        TOOLS_WARN_EXCEPTION( "slideshow", "" );
+        // TODO(E2): Error handling. For now, bail out
+    }
+
+    mbShowLoaded = true;
+
+    return true;
+}
+
+void SlideImpl::enablePaintOverlay()
+{
+    if( !mbUserPaintOverlayEnabled || !mbPaintOverlayActive )
+    {
+        mbUserPaintOverlayEnabled = true;
+        activatePaintOverlay();
+    }
+}
+
+void SlideImpl::activatePaintOverlay()
+{
+    if( mbUserPaintOverlayEnabled || !maPolygons.empty() )
+    {
+        mpPaintOverlay = UserPaintOverlay::create( maUserPaintColor,
+                                                   mdUserPaintStrokeWidth,
+                                                   maContext,
+                                                   std::vector(maPolygons),
+                                                   mbUserPaintOverlayEnabled );
+        mbPaintOverlayActive = true;
+    }
+}
+
+void SlideImpl::drawPolygons() const
+{
+    if( mpPaintOverlay  )
+        mpPaintOverlay->drawPolygons();
+}
+
+void SlideImpl::addPolygons(const PolyPolygonVector& rPolygons)
+{
+    maPolygons.insert(maPolygons.end(), rPolygons.begin(), rPolygons.end());
+}
+
+bool SlideImpl::isPaintOverlayActive() const
+{
+    return mbPaintOverlayActive;
+}
+
+void SlideImpl::deactivatePaintOverlay()
+{
+    if(mbPaintOverlayActive)
+        maPolygons = mpPaintOverlay->getPolygons();
+
+    mpPaintOverlay.reset();
+    mbPaintOverlayActive = false;
+}
+
+void SlideImpl::applyShapeAttributes(
+    const css::uno::Reference< css::animations::XAnimationNode >& xRootAnimationNode,
+    bool bInitial) const
+{
+    const uno::Sequence< animations::TargetProperties > aProps(
+        TargetPropertiesCreator::createTargetProperties( xRootAnimationNode, bInitial ) );
+
+    // apply extracted values to our shapes
+    for( const auto& rProp : aProps )
+    {
+        sal_Int16                         nParaIndex( -1 );
+        uno::Reference< drawing::XShape > xShape( rProp.Target,
+                                                  uno::UNO_QUERY );
+
+        if( !xShape.is() )
+        {
+            // not a shape target. Maybe a ParagraphTarget?
+            presentation::ParagraphTarget aParaTarget;
+
+            if( rProp.Target >>= aParaTarget )
+            {
+                // yep, ParagraphTarget found - extract shape
+                // and index
+                xShape = aParaTarget.Shape;
+                nParaIndex = aParaTarget.Paragraph;
+            }
+        }
+
+        if( xShape.is() )
+        {
+            ShapeSharedPtr pShape( mpLayerManager->lookupShape( xShape ) );
+
+            if( !pShape )
+            {
+                OSL_FAIL( "SlideImpl::applyInitialShapeAttributes(): no shape found for given target" );
+                continue;
+            }
+
+            AttributableShapeSharedPtr pAttrShape(
+                ::std::dynamic_pointer_cast< AttributableShape >( pShape ) );
+
+            if( !pAttrShape )
+            {
+                OSL_FAIL( "SlideImpl::applyInitialShapeAttributes(): shape found does not "
+                            "implement AttributableShape interface" );
+                continue;
+            }
+
+            if( nParaIndex != -1 )
+            {
+                // our target is a paragraph subset, thus look
+                // this up first.
+                const DocTreeNodeSupplier& rNodeSupplier( pAttrShape->getTreeNodeSupplier() );
+
+                if( rNodeSupplier.getNumberOfTreeNodes(
+                        DocTreeNode::NodeType::LogicalParagraph ) <= nParaIndex )
+                {
+                    OSL_FAIL( "SlideImpl::applyInitialShapeAttributes(): shape found does not "
+                                "provide a subset for requested paragraph index" );
+                    continue;
+                }
+
+                pAttrShape = pAttrShape->getSubset(
+                    rNodeSupplier.getTreeNode(
+                        nParaIndex,
+                        DocTreeNode::NodeType::LogicalParagraph ) );
+
+                if( !pAttrShape )
+                {
+                    OSL_FAIL( "SlideImpl::applyInitialShapeAttributes(): shape found does not "
+                                "provide a subset for requested paragraph index" );
+                    continue;
+                }
+            }
+
+            const uno::Sequence< beans::NamedValue >& rShapeProps( rProp.Properties );
+            for( const auto& rShapeProp : rShapeProps )
+            {
+                bool bVisible=false;
+                if( rShapeProp.Name.equalsIgnoreAsciiCase("visibility") &&
+                    extractValue( bVisible,
+                                  rShapeProp.Value,
+                                  pShape,
+                                  ::basegfx::B2DSize( getSlideSize() ) ))
+                {
+                    pAttrShape->setVisibility( bVisible );
+                }
+                else
+                {
+                    OSL_FAIL( "SlideImpl::applyInitialShapeAttributes(): Unexpected "
+                                "(and unimplemented) property encountered" );
+                }
+            }
+        }
+    }
+}
+
+bool SlideImpl::applyInitialShapeAttributes(
+    const uno::Reference< animations::XAnimationNode >& xRootAnimationNode )
+{
+    if( !implPrefetchShow() )
+        return false;
+
+    if( !xRootAnimationNode.is() )
+    {
+        meAnimationState = INITIAL_STATE;
+
+        return true; // no animations - no attributes to apply -
+                     // succeeded
+    }
+
+    applyShapeAttributes(xRootAnimationNode, true);
+
+    meAnimationState = INITIAL_STATE;
+
+    return true;
+}
+
+bool SlideImpl::loadShapes()
+{
+    if( mbShapesLoaded )
+        return true;
+
+    ENSURE_OR_RETURN_FALSE( mxDrawPage.is(),
+                       "SlideImpl::loadShapes(): Invalid draw page" );
+    ENSURE_OR_RETURN_FALSE( mpLayerManager,
+                       "SlideImpl::loadShapes(): Invalid layer manager" );
+
+    // fetch desired page content
+    // ==========================
+
+    // also take master page content
+    uno::Reference< drawing::XDrawPage > xMasterPage;
+    uno::Reference< drawing::XShapes >   xMasterPageShapes;
+    sal_Int32                            nCurrCount(0);
+
+    uno::Reference< drawing::XMasterPageTarget > xMasterPageTarget( mxDrawPage,
+                                                                    uno::UNO_QUERY );
+    if( xMasterPageTarget.is() )
+    {
+        xMasterPage = xMasterPageTarget->getMasterPage();
+        xMasterPageShapes = xMasterPage;
+
+        if( xMasterPage.is() && xMasterPageShapes.is() )
+        {
+            // TODO(P2): maybe cache master pages here (or treat the
+            // masterpage as a single metafile. At least currently,
+            // masterpages do not contain animation effects)
+            try
+            {
+                // load the masterpage shapes
+
+                ShapeImporter aMPShapesFunctor( xMasterPage,
+                                                mxDrawPage,
+                                                mxDrawPagesSupplier,
+                                                maContext,
+                                                0, /* shape num starts at 0 */
+                                                true );
+
+                mpLayerManager->addShape(
+                    aMPShapesFunctor.importBackgroundShape() );
+
+                while( !aMPShapesFunctor.isImportDone() )
+                {
+                    ShapeSharedPtr const& rShape(
+                        aMPShapesFunctor.importShape() );
+                    if( rShape )
+                    {
+                        rShape->setIsForeground(false);
+                        mpLayerManager->addShape( rShape );
+                    }
+                }
+                addPolygons(aMPShapesFunctor.getPolygons());
+
+                nCurrCount = static_cast<sal_Int32>(aMPShapesFunctor.getImportedShapesCount());
+            }
+            catch( uno::RuntimeException& )
+            {
+                throw;
+            }
+            catch( ShapeLoadFailedException& )
+            {
+                // TODO(E2): Error handling. For now, bail out
+                TOOLS_WARN_EXCEPTION( "slideshow", "SlideImpl::loadShapes(): caught ShapeLoadFailedException" );
+                return false;
+
+            }
+            catch( uno::Exception& )
+            {
+                TOOLS_WARN_EXCEPTION( "slideshow", "" );
+                return false;
+            }
+        }
+    }
+
+    try
+    {
+        // load the normal page shapes
+
+
+        ShapeImporter aShapesFunctor( mxDrawPage,
+                                      mxDrawPage,
+                                      mxDrawPagesSupplier,
+                                      maContext,
+                                      nCurrCount,
+                                      false );
+
+        while( !aShapesFunctor.isImportDone() )
+        {
+            ShapeSharedPtr const& rShape(
+                aShapesFunctor.importShape() );
+            if( rShape )
+                mpLayerManager->addShape( rShape );
+        }
+        addPolygons(aShapesFunctor.getPolygons());
+    }
+    catch( uno::RuntimeException& )
+    {
+        throw;
+    }
+    catch( ShapeLoadFailedException& )
+    {
+        // TODO(E2): Error handling. For now, bail out
+        TOOLS_WARN_EXCEPTION( "slideshow", "SlideImpl::loadShapes(): caught ShapeLoadFailedException" );
+        return false;
+    }
+    catch( uno::Exception& )
+    {
+        TOOLS_WARN_EXCEPTION( "slideshow", "" );
+        return false;
+    }
+
+    mbShapesLoaded = true;
+
+    return true;
+}
+
+basegfx::B2ISize SlideImpl::getSlideSizeImpl() const
+{
+    uno::Reference< beans::XPropertySet > xPropSet(
+        mxDrawPage, uno::UNO_QUERY_THROW );
+
+    sal_Int32 nDocWidth = 0;
+    sal_Int32 nDocHeight = 0;
+    xPropSet->getPropertyValue("Width") >>= nDocWidth;
+    xPropSet->getPropertyValue("Height") >>= nDocHeight;
+
+    return basegfx::B2ISize( nDocWidth, nDocHeight );
+}
+
+} // namespace
+
+
+SlideSharedPtr createSlide( const uno::Reference< drawing::XDrawPage >&         xDrawPage,
+                            const uno::Reference<drawing::XDrawPagesSupplier>&  xDrawPages,
+                            const uno::Reference< animations::XAnimationNode >& xRootNode,
+                            EventQueue&                                         rEventQueue,
+                            EventMultiplexer&                                   rEventMultiplexer,
+                            ScreenUpdater&                                      rScreenUpdater,
+                            ActivitiesQueue&                                    rActivitiesQueue,
+                            UserEventQueue&                                     rUserEventQueue,
+                            CursorManager&                                      rCursorManager,
+                            MediaFileManager&                                   rMediaFileManager,
+                            const UnoViewContainer&                             rViewContainer,
+                            const uno::Reference< uno::XComponentContext >&     xComponentContext,
+                            const ShapeEventListenerMap&                        rShapeListenerMap,
+                            const ShapeCursorMap&                               rShapeCursorMap,
+                            PolyPolygonVector&&                                 rPolyPolygonVector,
+                            RGBColor const&                                     rUserPaintColor,
+                            double                                              dUserPaintStrokeWidth,
+                            bool                                                bUserPaintEnabled,
+                            bool                                                bIntrinsicAnimationsAllowed,
+                            bool                                                bDisableAnimationZOrder )
+{
+    auto pRet = std::make_shared<SlideImpl>( xDrawPage, xDrawPages, xRootNode, rEventQueue,
+                                             rEventMultiplexer, rScreenUpdater,
+                                             rActivitiesQueue, rUserEventQueue,
+                                             rCursorManager, rMediaFileManager, rViewContainer,
+                                             xComponentContext, rShapeListenerMap,
+                                             rShapeCursorMap, std::move(rPolyPolygonVector), rUserPaintColor,
+                                             dUserPaintStrokeWidth, bUserPaintEnabled,
+                                             bIntrinsicAnimationsAllowed,
+                                             bDisableAnimationZOrder );
+
+    rEventMultiplexer.addViewHandler( pRet );
+
+    return pRet;
+}
+
+} // namespace slideshow
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/targetpropertiescreator.cxx b/slideshow/source/engine/slide/targetpropertiescreator.cxx
new file mode 100644
index 000000000..fdc45c3da
--- /dev/null
+++ b/slideshow/source/engine/slide/targetpropertiescreator.cxx
@@ -0,0 +1,370 @@
+/* -*- 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 <com/sun/star/animations/XIterateContainer.hpp>
+#include <com/sun/star/presentation/ParagraphTarget.hpp>
+#include <com/sun/star/drawing/XShape.hpp>
+#include <com/sun/star/animations/AnimationNodeType.hpp>
+#include <com/sun/star/animations/XAnimate.hpp>
+#include <comphelper/sequence.hxx>
+
+#include <unordered_map>
+#include <vector>
+
+#include "targetpropertiescreator.hxx"
+#include <tools.hxx>
+
+namespace slideshow::internal
+{
+    namespace
+    {
+        // Vector containing all properties for a given shape
+        typedef ::std::vector< beans::NamedValue > VectorOfNamedValues;
+
+        /** The hash map key
+
+            This key contains both XShape reference and a paragraph
+            index, as we somehow have to handle shape and paragraph
+            targets with the same data structure.
+         */
+        struct ShapeHashKey
+        {
+            /// Shape target
+            uno::Reference< drawing::XShape >   mxRef;
+
+            /** Paragraph index.
+
+                If this is a pure shape target, mnParagraphIndex is
+                set to -1.
+             */
+            sal_Int16                           mnParagraphIndex;
+
+            /// Comparison needed for unordered_map
+            bool operator==( const ShapeHashKey& rRHS ) const
+            {
+                return mxRef == rRHS.mxRef && mnParagraphIndex == rRHS.mnParagraphIndex;
+            }
+        };
+
+        // A hash functor for ShapeHashKey objects
+        struct ShapeKeyHasher
+        {
+            ::std::size_t operator()( const ShapeHashKey& rKey ) const
+            {
+                // TODO(P2): Maybe a better hash function would be to
+                // spread mnParagraphIndex to 32 bit: a0b0c0d0e0... Hakmem
+                // should have a formula.
+
+                // Yes it has:
+                // x = (x & 0x0000FF00) << 8) | (x >> 8) & 0x0000FF00 | x & 0xFF0000FF;
+                // x = (x & 0x00F000F0) << 4) | (x >> 4) & 0x00F000F0 | x & 0xF00FF00F;
+                // x = (x & 0x0C0C0C0C) << 2) | (x >> 2) & 0x0C0C0C0C | x & 0xC3C3C3C3;
+                // x = (x & 0x22222222) << 1) | (x >> 1) & 0x22222222 | x & 0x99999999;
+
+                // Costs about 17 cycles on a RISC machine with infinite
+                // instruction level parallelism (~42 basic
+                // instructions). Thus I truly doubt this pays off...
+                return reinterpret_cast< ::std::size_t >(rKey.mxRef.get()) ^ (rKey.mnParagraphIndex << 16);
+            }
+        };
+
+        // A hash map which maps a XShape to the corresponding vector of initial properties
+        typedef std::unordered_map< ShapeHashKey, VectorOfNamedValues, ShapeKeyHasher > XShapeToNamedValuesMap;
+
+
+        class NodeFunctor
+        {
+        public:
+            explicit NodeFunctor(
+                XShapeToNamedValuesMap& rShapeHash,
+                bool bInitial )
+            :   mrShapeHash( rShapeHash ),
+                mxTargetShape(),
+                mnParagraphIndex( -1 ),
+                mbInitial( bInitial)
+            {
+            }
+
+            NodeFunctor( XShapeToNamedValuesMap&                    rShapeHash,
+                         const uno::Reference< drawing::XShape >&   rTargetShape,
+                         sal_Int16                                  nParagraphIndex,
+                         bool                                       bInitial) :
+                mrShapeHash( rShapeHash ),
+                mxTargetShape( rTargetShape ),
+                mnParagraphIndex( nParagraphIndex ),
+                mbInitial( bInitial )
+            {
+            }
+
+            void operator()( const uno::Reference< animations::XAnimationNode >& xNode ) const
+            {
+                if( !xNode.is() )
+                {
+                    OSL_FAIL( "AnimCore: NodeFunctor::operator(): invalid XAnimationNode" );
+                    return;
+                }
+
+                uno::Reference< drawing::XShape > xTargetShape( mxTargetShape );
+                sal_Int16                         nParagraphIndex( mnParagraphIndex );
+
+                switch( xNode->getType() )
+                {
+                    case animations::AnimationNodeType::ITERATE:
+                    {
+                        // extract target shape from iterate node
+                        // (will override the target for all children)
+
+                        uno::Reference< animations::XIterateContainer > xIterNode( xNode,
+                                                                                   uno::UNO_QUERY );
+
+                        // TODO(E1): I'm not too sure what to expect here...
+                        if( !xIterNode->getTarget().hasValue() )
+                        {
+                            OSL_FAIL( "animcore: NodeFunctor::operator(): no target on ITERATE node" );
+                            return;
+                        }
+
+                        xTargetShape.set( xIterNode->getTarget(),
+                                          uno::UNO_QUERY );
+
+                        if( !xTargetShape.is() )
+                        {
+                            css::presentation::ParagraphTarget aTarget;
+
+                            // no shape provided. Maybe a ParagraphTarget?
+                            if( !(xIterNode->getTarget() >>= aTarget) )
+                            {
+                                OSL_FAIL( "animcore: NodeFunctor::operator(): could not extract any "
+                                            "target information" );
+                                return;
+                            }
+
+                            xTargetShape = aTarget.Shape;
+                            nParagraphIndex = aTarget.Paragraph;
+
+                            if( !xTargetShape.is() )
+                            {
+                                OSL_FAIL( "animcore: NodeFunctor::operator(): invalid shape in ParagraphTarget" );
+                                return;
+                            }
+                        }
+                        [[fallthrough]];
+                    }
+                    case animations::AnimationNodeType::PAR:
+                    case animations::AnimationNodeType::SEQ:
+                    {
+                        /// forward bInitial
+                        NodeFunctor aFunctor( mrShapeHash,
+                                              xTargetShape,
+                                              nParagraphIndex,
+                                              mbInitial );
+                        if( !for_each_childNode( xNode, aFunctor ) )
+                        {
+                            OSL_FAIL( "AnimCore: NodeFunctor::operator(): child node iteration failed, "
+                                        "or extraneous container nodes encountered" );
+                        }
+                    }
+                    break;
+
+                    case animations::AnimationNodeType::CUSTOM:
+                    case animations::AnimationNodeType::ANIMATE:
+                    case animations::AnimationNodeType::ANIMATEMOTION:
+                    case animations::AnimationNodeType::ANIMATECOLOR:
+                    case animations::AnimationNodeType::ANIMATETRANSFORM:
+                    case animations::AnimationNodeType::TRANSITIONFILTER:
+                    case animations::AnimationNodeType::AUDIO:
+                    /*default:
+                        // ignore this node, no valuable content for now.
+                        break;*/
+
+                    case animations::AnimationNodeType::SET:
+                    {
+                        // evaluate set node content
+                        uno::Reference< animations::XAnimate > xAnimateNode( xNode,
+                                                                             uno::UNO_QUERY );
+
+                        if( !xAnimateNode.is() )
+                            break; // invalid node
+
+                        // determine target shape (if any)
+                        ShapeHashKey aTarget;
+                        if( xTargetShape.is() )
+                        {
+                            // override target shape with parent-supplied
+                            aTarget.mxRef = xTargetShape;
+                            aTarget.mnParagraphIndex = nParagraphIndex;
+                        }
+                        else
+                        {
+                            // no parent-supplied target, retrieve
+                            // node target
+                            if( xAnimateNode->getTarget() >>= aTarget.mxRef )
+                            {
+                                // pure shape target - set paragraph
+                                // index to magic
+                                aTarget.mnParagraphIndex = -1;
+                            }
+                            else
+                            {
+                                // not a pure shape target - maybe a
+                                // ParagraphTarget?
+                                presentation::ParagraphTarget aUnoTarget;
+
+                                if( !(xAnimateNode->getTarget() >>= aUnoTarget) )
+                                {
+                                    OSL_FAIL( "AnimCore: NodeFunctor::operator(): unknown target type encountered" );
+                                    break;
+                                }
+
+                                aTarget.mxRef = aUnoTarget.Shape;
+                                aTarget.mnParagraphIndex = aUnoTarget.Paragraph;
+                            }
+                        }
+
+                        if( !aTarget.mxRef.is() )
+                        {
+                            OSL_FAIL( "AnimCore: NodeFunctor::operator(): Found target, but XShape is NULL" );
+                            break; // invalid target XShape
+                        }
+
+                        // check whether we already have an entry for
+                        // this target (we only take the first set
+                        // effect for every shape) - but keep going if
+                        // we're requested the final state (which
+                        // eventually gets overwritten in the
+                        // unordered list, see tdf#96083)
+                        if( mbInitial && mrShapeHash.find( aTarget ) != mrShapeHash.end() )
+                            break; // already an entry in existence for given XShape
+
+                        // if this is an appear effect, hide shape
+                        // initially. This is currently the only place
+                        // where a shape effect influences shape
+                        // attributes outside it's effective duration.
+                        bool bVisible( false );
+                        if( xAnimateNode->getAttributeName().equalsIgnoreAsciiCase("visibility") )
+                        {
+
+                            uno::Any aAny( xAnimateNode->getTo() );
+
+                            // try to extract bool value
+                            if( !(aAny >>= bVisible) )
+                            {
+                                // try to extract string
+                                OUString aString;
+                                if( aAny >>= aString )
+                                {
+                                    // we also take the strings "true" and "false",
+                                    // as well as "on" and "off" here
+                                    if( aString.equalsIgnoreAsciiCase("true") ||
+                                        aString.equalsIgnoreAsciiCase("on") )
+                                    {
+                                        bVisible = true;
+                                    }
+                                    if( aString.equalsIgnoreAsciiCase("false") ||
+                                        aString.equalsIgnoreAsciiCase("off") )
+                                    {
+                                        bVisible = false;
+                                    }
+                                }
+                            }
+                        }
+
+                        // if initial anim sets shape visible, set it
+                        // to invisible. If we're asked for the final
+                        // state, don't do anything obviously
+                        if(mbInitial)
+                            bVisible = !bVisible;
+
+                        // target is set the 'visible' value,
+                        // so we should record the opposite value
+                        mrShapeHash.emplace(
+                                        aTarget,
+                                        VectorOfNamedValues(
+                                            1,
+                                            beans::NamedValue(
+                                                //xAnimateNode->getAttributeName(),
+                                                "visibility",
+                                                uno::Any( bVisible ) ) ) );
+                        break;
+                    }
+                }
+            }
+
+        private:
+            XShapeToNamedValuesMap&             mrShapeHash;
+            uno::Reference< drawing::XShape >   mxTargetShape;
+            sal_Int16                           mnParagraphIndex;
+
+            // get initial or final state
+            bool                                mbInitial;
+        };
+    }
+
+    uno::Sequence< animations::TargetProperties > TargetPropertiesCreator::createTargetProperties
+        (
+            const uno::Reference< animations::XAnimationNode >& xRootNode,
+            bool bInitial
+        ) //throw (uno::RuntimeException, std::exception)
+    {
+        // scan all nodes for visibility changes, and record first
+        // 'visibility=true' for each shape
+        XShapeToNamedValuesMap aShapeHash( 101 );
+
+        NodeFunctor aFunctor(
+            aShapeHash,
+            bInitial );
+
+        // TODO(F1): Maybe limit functor application to main sequence
+        // alone (CL said something that shape visibility is only
+        // affected by effects in the main sequence for PPT).
+
+        // OTOH, client code can pass us only the main sequence (which
+        // it actually does right now, for the slideshow implementation).
+        aFunctor( xRootNode );
+
+        // output to result sequence
+        uno::Sequence< animations::TargetProperties > aRes( aShapeHash.size() );
+        auto aResRange = asNonConstRange(aRes);
+
+        ::std::size_t                       nCurrIndex(0);
+        for( const auto& rIter : aShapeHash )
+        {
+            animations::TargetProperties& rCurrProps( aResRange[ nCurrIndex++ ] );
+
+            if( rIter.first.mnParagraphIndex == -1 )
+            {
+                rCurrProps.Target <<= rIter.first.mxRef;
+            }
+            else
+            {
+                rCurrProps.Target <<=
+                    presentation::ParagraphTarget(
+                        rIter.first.mxRef,
+                        rIter.first.mnParagraphIndex );
+            }
+
+            rCurrProps.Properties = ::comphelper::containerToSequence( rIter.second );
+        }
+
+        return aRes;
+    }
+
+} // namespace slideshow::internal
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/targetpropertiescreator.hxx b/slideshow/source/engine/slide/targetpropertiescreator.hxx
new file mode 100644
index 000000000..79c1e49a5
--- /dev/null
+++ b/slideshow/source/engine/slide/targetpropertiescreator.hxx
@@ -0,0 +1,39 @@
+/* -*- 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_SLIDESHOW_SOURCE_ENGINE_SLIDE_TARGETPROPERTIESCREATOR_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_TARGETPROPERTIESCREATOR_HXX
+
+#include <com/sun/star/animations/TargetProperties.hpp>
+#include <com/sun/star/animations/XAnimationNode.hpp>
+
+using namespace ::com::sun::star;
+
+namespace slideshow::internal::TargetPropertiesCreator
+{
+            /// Generate shape property list - set bInitial to true for initial slide state
+            uno::Sequence< animations::TargetProperties > createTargetProperties(
+                const uno::Reference< animations::XAnimationNode >& rootNode,
+                bool bInitial );
+
+} // namespace slideshow::internal::TargetPropertiesCreator
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_TARGETPROPERTIESCREATOR_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/userpaintoverlay.cxx b/slideshow/source/engine/slide/userpaintoverlay.cxx
new file mode 100644
index 000000000..d635fc60a
--- /dev/null
+++ b/slideshow/source/engine/slide/userpaintoverlay.cxx
@@ -0,0 +1,485 @@
+/* -*- 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 <com/sun/star/awt/MouseButton.hpp>
+#include <com/sun/star/awt/MouseEvent.hpp>
+
+#include <basegfx/point/b2dpoint.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <cppcanvas/basegfxfactory.hxx>
+#include <tools/diagnose_ex.h>
+
+#include <slideshowcontext.hxx>
+#include "userpaintoverlay.hxx"
+#include <mouseeventhandler.hxx>
+#include <eventmultiplexer.hxx>
+#include <screenupdater.hxx>
+#include <vieweventhandler.hxx>
+
+#include <slide.hxx>
+#include <cursormanager.hxx>
+
+using namespace ::com::sun::star;
+
+namespace slideshow::internal
+{
+        class PaintOverlayHandler : public MouseEventHandler,
+                                    public ViewEventHandler,
+                    public UserPaintEventHandler
+        {
+        public:
+            PaintOverlayHandler( const RGBColor&          rStrokeColor,
+                                 double                   nStrokeWidth,
+                                 ScreenUpdater&           rScreenUpdater,
+                                 const UnoViewContainer&  rViews,
+                                 Slide&                   rSlide,
+                                 PolyPolygonVector&&      rPolygons,
+                                 bool                     bActive ) :
+                mrScreenUpdater( rScreenUpdater ),
+                maViews(),
+                maPolygons( std::move(rPolygons) ),
+                maStrokeColor( rStrokeColor ),
+                mnStrokeWidth( nStrokeWidth ),
+                maLastPoint(),
+                maLastMouseDownPos(),
+                mbIsLastPointValid( false ),
+                mbIsLastMouseDownPosValid( false ),
+                //handle the "remove all ink from slide" mode of erasing
+                mbIsEraseAllModeActivated( false ),
+                //handle the "remove stroke by stroke" mode of erasing
+                mbIsEraseModeActivated( false ),
+                mrSlide(rSlide),
+                mnSize(100),
+                mbActive( bActive )
+            {
+                for( const auto& rView : rViews )
+                    viewAdded( rView );
+
+                drawPolygons();
+            }
+
+            void dispose()
+            {
+                maViews.clear();
+            }
+
+            // ViewEventHandler methods
+            virtual void viewAdded( const UnoViewSharedPtr& rView ) override
+            {
+                maViews.push_back( rView );
+            }
+
+            virtual void viewRemoved( const UnoViewSharedPtr& rView ) override
+            {
+                maViews.erase( ::std::remove( maViews.begin(),
+                                              maViews.end(),
+                                              rView ) );
+            }
+
+            virtual void viewChanged( const UnoViewSharedPtr& /*rView*/ ) override
+            {
+                // TODO(F2): for persistent drawings, need to store
+                // polygon and repaint here.
+            }
+
+            virtual void viewsChanged() override
+            {
+                // TODO(F2): for persistent drawings, need to store
+                // polygon and repaint here.
+            }
+
+            bool colorChanged( RGBColor const& rUserColor ) override
+            {
+                mbIsLastPointValid = false;
+                mbActive = true;
+                maStrokeColor = rUserColor;
+                mbIsEraseModeActivated = false;
+                return true;
+            }
+
+            bool widthChanged( double nUserStrokeWidth ) override
+            {
+                mnStrokeWidth = nUserStrokeWidth;
+                mbIsEraseModeActivated = false;
+                return true;
+            }
+
+            void repaintWithoutPolygons()
+            {
+                    // must get access to the instance to erase all polygon
+                    for( const auto& rxView : maViews )
+                    {
+                        // fully clear view content to background color
+                        //rxView->getCanvas()->clear();
+
+                        //get via SlideImpl instance the bitmap of the slide unmodified to redraw it
+                        SlideBitmapSharedPtr         pBitmap( mrSlide.getCurrentSlideBitmap( rxView ) );
+                        ::cppcanvas::CanvasSharedPtr pCanvas( rxView->getCanvas() );
+
+                        const ::basegfx::B2DHomMatrix   aViewTransform( rxView->getTransformation() );
+                        const ::basegfx::B2DPoint       aOutPosPixel( aViewTransform * ::basegfx::B2DPoint() );
+
+                        // setup a canvas with device coordinate space, the slide
+                        // bitmap already has the correct dimension.
+                        ::cppcanvas::CanvasSharedPtr pDevicePixelCanvas( pCanvas->clone() );
+
+                        pDevicePixelCanvas->setTransformation( ::basegfx::B2DHomMatrix() );
+
+                        // render at given output position
+                        pBitmap->move( aOutPosPixel );
+
+                        // clear clip (might have been changed, e.g. from comb
+                        // transition)
+                        pBitmap->clip( ::basegfx::B2DPolyPolygon() );
+                        pBitmap->draw( pDevicePixelCanvas );
+
+                        mrScreenUpdater.notifyUpdate(rxView,true);
+                    }
+            }
+
+            bool eraseAllInkChanged( bool bEraseAllInk ) override
+            {
+                mbIsEraseAllModeActivated = bEraseAllInk;
+                // if the erase all mode is activated it will remove all ink from slide,
+                // therefore destroy all the polygons stored
+                if(mbIsEraseAllModeActivated)
+                {
+                    // The Erase Mode should be deactivated
+                    mbIsEraseModeActivated = false;
+                    repaintWithoutPolygons();
+                    maPolygons.clear();
+                }
+                mbIsEraseAllModeActivated=false;
+                return true;
+            }
+
+            bool eraseInkWidthChanged( sal_Int32 rEraseInkSize ) override
+            {
+                // Change the size
+                mnSize=rEraseInkSize;
+                // Changed to mode Erase
+                mbIsEraseModeActivated = true;
+                return true;
+            }
+
+            bool switchPenMode() override
+            {
+                mbIsLastPointValid = false;
+                mbActive = true;
+                mbIsEraseModeActivated = false;
+                return true;
+            }
+
+            bool switchEraserMode() override
+            {
+                mbIsLastPointValid = false;
+                mbActive = true;
+                mbIsEraseModeActivated = true;
+                return true;
+            }
+
+            bool disable() override
+            {
+                mbIsLastPointValid = false;
+                mbIsLastMouseDownPosValid = false;
+                mbActive = false;
+                return true;
+            }
+
+            //Draw all registered polygons.
+            void drawPolygons()
+            {
+                for( const auto& rxPolygon : maPolygons )
+                {
+                    rxPolygon->draw();
+                }
+                // screen update necessary to show painting
+                mrScreenUpdater.notifyUpdate();
+            }
+
+            //Retrieve all registered polygons.
+            const PolyPolygonVector& getPolygons() const
+            {
+                return maPolygons;
+            }
+
+            // MouseEventHandler methods
+            virtual bool handleMousePressed( const awt::MouseEvent& e ) override
+            {
+                if( !mbActive )
+                    return false;
+
+                if (e.Buttons == awt::MouseButton::RIGHT)
+                {
+                    mbIsLastPointValid = false;
+                    return false;
+                }
+
+                if (e.Buttons != awt::MouseButton::LEFT)
+                    return false;
+
+                maLastMouseDownPos.setX( e.X );
+                maLastMouseDownPos.setY( e.Y );
+                mbIsLastMouseDownPosValid = true;
+
+                // eat mouse click (though we don't process it
+                // _directly_, it enables the drag mode
+                return true;
+            }
+
+            virtual bool handleMouseReleased( const awt::MouseEvent& e ) override
+            {
+                if( !mbActive )
+                    return false;
+
+                if (e.Buttons == awt::MouseButton::RIGHT)
+                {
+                    mbIsLastPointValid = false;
+                    return false;
+                }
+
+                if (e.Buttons != awt::MouseButton::LEFT)
+                    return false;
+
+                // check, whether up- and down press are on exactly
+                // the same pixel. If that's the case, ignore the
+                // click, and pass on the event to low-prio
+                // handlers. This effectively permits effect
+                // advancements via clicks also when user paint is
+                // enabled.
+                if( mbIsLastMouseDownPosValid &&
+                    ::basegfx::B2DPoint( e.X,
+                                         e.Y ) == maLastMouseDownPos )
+                {
+                    mbIsLastMouseDownPosValid = false;
+                    return false;
+                }
+
+                // invalidate, next downpress will have to start a new
+                // polygon.
+                mbIsLastPointValid = false;
+
+                // eat mouse click (though we don't process it
+                // _directly_, it enables the drag mode
+                return true;
+            }
+
+            virtual bool handleMouseDragged( const awt::MouseEvent& e ) override
+            {
+                if( !mbActive )
+                    return false;
+
+                if (e.Buttons == awt::MouseButton::RIGHT)
+                {
+                    mbIsLastPointValid = false;
+                    return false;
+                }
+
+                if(mbIsEraseModeActivated)
+                {
+                    //define the last point as an object
+                    //we suppose that there's no way this point could be valid
+                    ::basegfx::B2DPolygon aPoly;
+
+                    maLastPoint.setX( e.X-mnSize );
+                    maLastPoint.setY( e.Y-mnSize );
+
+                    aPoly.append( maLastPoint );
+
+                    maLastPoint.setX( e.X-mnSize );
+                    maLastPoint.setY( e.Y+mnSize );
+
+                    aPoly.append( maLastPoint );
+                    maLastPoint.setX( e.X+mnSize );
+                    maLastPoint.setY( e.Y+mnSize );
+
+                    aPoly.append( maLastPoint );
+                    maLastPoint.setX( e.X+mnSize );
+                    maLastPoint.setY( e.Y-mnSize );
+
+                    aPoly.append( maLastPoint );
+                    maLastPoint.setX( e.X-mnSize );
+                    maLastPoint.setY( e.Y-mnSize );
+
+                    aPoly.append( maLastPoint );
+
+                    //now we have defined a Polygon that is closed
+
+                    //The point is to redraw the LastPoint the way it was originally on the bitmap,
+                    //of the slide
+                    for (const auto& rxView : maViews)
+                    {
+
+                        //get via SlideImpl instance the bitmap of the slide unmodified to redraw it
+                        SlideBitmapSharedPtr         pBitmap( mrSlide.getCurrentSlideBitmap( rxView ) );
+                        ::cppcanvas::CanvasSharedPtr pCanvas( rxView->getCanvas() );
+
+                        ::basegfx::B2DHomMatrix     aViewTransform( rxView->getTransformation() );
+                        const ::basegfx::B2DPoint       aOutPosPixel( aViewTransform * ::basegfx::B2DPoint() );
+
+                        // setup a canvas with device coordinate space, the slide
+                        // bitmap already has the correct dimension.
+                        ::cppcanvas::CanvasSharedPtr pDevicePixelCanvas( pCanvas->clone() );
+
+                        pDevicePixelCanvas->setTransformation( ::basegfx::B2DHomMatrix() );
+
+                        // render at given output position
+                        pBitmap->move( aOutPosPixel );
+
+                        ::basegfx::B2DPolyPolygon aPolyPoly(aPoly);
+                        aViewTransform.translate(-aOutPosPixel.getX(), -aOutPosPixel.getY());
+                        aPolyPoly.transform(aViewTransform);
+                        // set clip so that we just redraw a part of the canvas
+                        pBitmap->clip(aPolyPoly);
+                        pBitmap->draw( pDevicePixelCanvas );
+
+                        mrScreenUpdater.notifyUpdate(rxView,true);
+                    }
+
+                }
+                else
+                {
+                    if( !mbIsLastPointValid )
+                    {
+                        mbIsLastPointValid = true;
+                        maLastPoint.setX( e.X );
+                        maLastPoint.setY( e.Y );
+                    }
+                    else
+                    {
+                        ::basegfx::B2DPolygon aPoly;
+                        aPoly.append( maLastPoint );
+
+                        maLastPoint.setX( e.X );
+                        maLastPoint.setY( e.Y );
+
+                        aPoly.append( maLastPoint );
+
+                        // paint to all views
+                        for (const auto& rxView : maViews)
+                        {
+                            ::cppcanvas::PolyPolygonSharedPtr pPolyPoly(
+                                ::cppcanvas::BaseGfxFactory::createPolyPolygon( rxView->getCanvas(),
+                                                                                aPoly ) );
+
+                            if( pPolyPoly )
+                            {
+                                pPolyPoly->setStrokeWidth(mnStrokeWidth);
+                                pPolyPoly->setRGBALineColor( maStrokeColor.getIntegerColor() );
+                                pPolyPoly->draw();
+                                maPolygons.push_back(pPolyPoly);
+                            }
+                        }
+
+                        // screen update necessary to show painting
+                        mrScreenUpdater.notifyUpdate();
+                    }
+                }
+                // mouse events captured
+                return true;
+            }
+
+            virtual bool handleMouseMoved( const awt::MouseEvent& /*e*/ ) override
+            {
+                // not used here
+                return false; // did not handle the event
+            }
+
+        private:
+            ScreenUpdater&          mrScreenUpdater;
+            UnoViewVector           maViews;
+            PolyPolygonVector       maPolygons;
+            RGBColor                maStrokeColor;
+            double                  mnStrokeWidth;
+            basegfx::B2DPoint       maLastPoint;
+            basegfx::B2DPoint       maLastMouseDownPos;
+            bool                    mbIsLastPointValid;
+            bool                    mbIsLastMouseDownPosValid;
+            // added bool for erasing purpose :
+            bool                    mbIsEraseAllModeActivated;
+            bool                    mbIsEraseModeActivated;
+            Slide&                  mrSlide;
+            sal_Int32               mnSize;
+            bool                    mbActive;
+        };
+
+        UserPaintOverlaySharedPtr UserPaintOverlay::create( const RGBColor&          rStrokeColor,
+                                                            double                   nStrokeWidth,
+                                                            const SlideShowContext&  rContext,
+                                                            PolyPolygonVector&&      rPolygons,
+                                                            bool                     bActive )
+        {
+            UserPaintOverlaySharedPtr pRet( new UserPaintOverlay( rStrokeColor,
+                                                                  nStrokeWidth,
+                                                                  rContext,
+                                                                  std::move(rPolygons),
+                                                                  bActive));
+
+            return pRet;
+        }
+
+        UserPaintOverlay::UserPaintOverlay( const RGBColor&          rStrokeColor,
+                                            double                   nStrokeWidth,
+                                            const SlideShowContext&  rContext,
+                                            PolyPolygonVector&&      rPolygons,
+                                            bool                     bActive ) :
+            mpHandler( std::make_shared<PaintOverlayHandler>( rStrokeColor,
+                                                nStrokeWidth,
+                                                rContext.mrScreenUpdater,
+                                                rContext.mrViewContainer,
+                                                //adding a link to Slide
+                                                dynamic_cast<Slide&>(rContext.mrCursorManager),
+                                                std::move(rPolygons), bActive )),
+            mrMultiplexer( rContext.mrEventMultiplexer )
+        {
+            mrMultiplexer.addClickHandler( mpHandler, 3.0 );
+            mrMultiplexer.addMouseMoveHandler( mpHandler, 3.0 );
+            mrMultiplexer.addViewHandler( mpHandler );
+            mrMultiplexer.addUserPaintHandler(mpHandler);
+        }
+
+        PolyPolygonVector const & UserPaintOverlay::getPolygons() const
+        {
+            return mpHandler->getPolygons();
+        }
+
+        void UserPaintOverlay::drawPolygons()
+        {
+            mpHandler->drawPolygons();
+        }
+
+        UserPaintOverlay::~UserPaintOverlay()
+        {
+            try
+            {
+                mrMultiplexer.removeMouseMoveHandler( mpHandler );
+                mrMultiplexer.removeClickHandler( mpHandler );
+                mrMultiplexer.removeViewHandler( mpHandler );
+                mpHandler->dispose();
+            }
+            catch (const uno::Exception&)
+            {
+                TOOLS_WARN_EXCEPTION("slideshow", "");
+            }
+        }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slide/userpaintoverlay.hxx b/slideshow/source/engine/slide/userpaintoverlay.hxx
new file mode 100644
index 000000000..ae443a0fa
--- /dev/null
+++ b/slideshow/source/engine/slide/userpaintoverlay.hxx
@@ -0,0 +1,83 @@
+/* -*- 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_SLIDESHOW_SOURCE_ENGINE_SLIDE_USERPAINTOVERLAY_HXX
+#define INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_USERPAINTOVERLAY_HXX
+
+#include <cppcanvas/canvasgraphic.hxx>
+
+#include <rgbcolor.hxx>
+
+#include <memory>
+#include <vector>
+
+/* Definition of UserPaintOverlay class */
+
+namespace slideshow::internal
+    {
+        class EventMultiplexer;
+        struct SlideShowContext;
+
+        class PaintOverlayHandler;
+        typedef ::std::shared_ptr< class UserPaintOverlay > UserPaintOverlaySharedPtr;
+        typedef ::std::vector< ::cppcanvas::PolyPolygonSharedPtr> PolyPolygonVector;
+        /** Slide overlay, which can be painted into by the user.
+
+            This class registers itself at the EventMultiplexer,
+            listening for mouse clicks and moves. When the mouse is
+            dragged, a hand sketching in the selected color is shown.
+        */
+        class UserPaintOverlay
+        {
+        public:
+            /** Create a UserPaintOverlay
+
+                @param rStrokeColor
+                Color to use for drawing
+
+                @param nStrokeWidth
+                Width of the stroked path
+             */
+            static UserPaintOverlaySharedPtr create( const RGBColor&          rStrokeColor,
+                                                     double                   nStrokeWidth,
+                                                     const SlideShowContext&  rContext,
+                                                     PolyPolygonVector&&      rPolygons,
+                                                     bool                     bActive);
+            ~UserPaintOverlay();
+            UserPaintOverlay(const UserPaintOverlay&) = delete;
+            UserPaintOverlay& operator=(const UserPaintOverlay&) = delete;
+            PolyPolygonVector const & getPolygons() const;
+            void drawPolygons();
+
+        private:
+            UserPaintOverlay( const RGBColor&          rStrokeColor,
+                              double                   nStrokeWidth,
+                              const SlideShowContext&  rContext,
+                              PolyPolygonVector&&     rPolygons,
+                              bool                    bActive );
+
+            ::std::shared_ptr<PaintOverlayHandler>    mpHandler;
+            EventMultiplexer&                           mrMultiplexer;
+        };
+
+}
+
+#endif // INCLUDED_SLIDESHOW_SOURCE_ENGINE_SLIDE_USERPAINTOVERLAY_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slidebitmap.cxx b/slideshow/source/engine/slidebitmap.cxx
new file mode 100644
index 000000000..368cb070c
--- /dev/null
+++ b/slideshow/source/engine/slidebitmap.cxx
@@ -0,0 +1,112 @@
+/* -*- 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/diagnose_ex.h>
+#include <slidebitmap.hxx>
+
+#include <com/sun/star/rendering/XCanvas.hpp>
+#include <com/sun/star/rendering/XBitmap.hpp>
+
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+
+#include <canvas/canvastools.hxx>
+#include <basegfx/utils/canvastools.hxx>
+
+
+using namespace ::com::sun::star;
+
+namespace slideshow::internal
+{
+
+        SlideBitmap::SlideBitmap( const ::cppcanvas::BitmapSharedPtr& rBitmap ) :
+            maOutputPos(),
+            maClipPoly(),
+            mxBitmap()
+        {
+            if( rBitmap )
+                mxBitmap = rBitmap->getUNOBitmap();
+
+            ENSURE_OR_THROW( mxBitmap.is(), "SlideBitmap::SlideBitmap(): Invalid bitmap" );
+        }
+
+        bool SlideBitmap::draw( const ::cppcanvas::CanvasSharedPtr& rCanvas ) const
+        {
+            ENSURE_OR_RETURN_FALSE( rCanvas && rCanvas->getUNOCanvas().is(),
+                               "SlideBitmap::draw(): Invalid canvas" );
+
+            // selectively only copy the transformation from current viewstate,
+            // don't want no clipping here.
+            rendering::ViewState aViewState;
+            aViewState.AffineTransform = rCanvas->getViewState().AffineTransform;
+
+            rendering::RenderState aRenderState;
+            ::canvas::tools::initRenderState( aRenderState );
+
+            const basegfx::B2DHomMatrix aTranslation(basegfx::utils::createTranslateB2DHomMatrix(maOutputPos));
+            ::canvas::tools::setRenderStateTransform( aRenderState, aTranslation );
+
+            try
+            {
+                if( maClipPoly.count() )
+                {
+                    // TODO(P1): Buffer the clip polygon
+                    aRenderState.Clip =
+                        ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
+                            rCanvas->getUNOCanvas()->getDevice(),
+                            maClipPoly );
+                }
+
+                rCanvas->getUNOCanvas()->drawBitmap( mxBitmap,
+                                                     aViewState,
+                                                     aRenderState );
+            }
+            catch( uno::Exception& )
+            {
+                TOOLS_WARN_EXCEPTION( "slideshow", "" );
+                return false;
+            }
+
+            return true;
+        }
+
+        ::basegfx::B2ISize SlideBitmap::getSize() const
+        {
+            return ::basegfx::unotools::b2ISizeFromIntegerSize2D( mxBitmap->getSize() );
+        }
+
+        void SlideBitmap::move( const ::basegfx::B2DPoint& rNewPos )
+        {
+            maOutputPos = rNewPos;
+        }
+
+        void SlideBitmap::clip( const ::basegfx::B2DPolyPolygon& rClipPoly )
+        {
+            maClipPoly = rClipPoly;
+        }
+
+        const css::uno::Reference< css::rendering::XBitmap >&  SlideBitmap::getXBitmap() const
+        {
+        return mxBitmap;
+        }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slideshowcontext.cxx b/slideshow/source/engine/slideshowcontext.cxx
new file mode 100644
index 000000000..f0433b9d8
--- /dev/null
+++ b/slideshow/source/engine/slideshowcontext.cxx
@@ -0,0 +1,70 @@
+/* -*- 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 <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/XComponentContext.hpp>
+
+#include <slideshowcontext.hxx>
+#include <subsettableshapemanager.hxx>
+#include <screenupdater.hxx>
+#include <eventqueue.hxx>
+#include <activitiesqueue.hxx>
+#include <usereventqueue.hxx>
+#include <eventmultiplexer.hxx>
+#include <unoviewcontainer.hxx>
+
+
+using namespace ::com::sun::star;
+
+namespace slideshow::internal
+{
+
+SlideShowContext::SlideShowContext( SubsettableShapeManagerSharedPtr& rSubsettableShapeManager,
+                                    EventQueue&                       rEventQueue,
+                                    EventMultiplexer&                 rEventMultiplexer,
+                                    ScreenUpdater&                    rScreenUpdater,
+                                    ActivitiesQueue&                  rActivitiesQueue,
+                                    UserEventQueue&                   rUserEventQueue,
+                                    CursorManager&                    rCursorManager,
+                                    MediaFileManager&                    rMediaFileManager,
+                                    const UnoViewContainer&           rViewContainer,
+                                    const uno::Reference<
+                                          uno::XComponentContext>&    rComponentContext,
+                                    box2d::utils::Box2DWorldSharedPtr& rBox2DWorldPtr ) :
+        mpSubsettableShapeManager( rSubsettableShapeManager ),
+        mrEventQueue( rEventQueue ),
+        mrEventMultiplexer( rEventMultiplexer ),
+        mrScreenUpdater( rScreenUpdater ),
+        mrActivitiesQueue( rActivitiesQueue ),
+        mrUserEventQueue( rUserEventQueue ),
+        mrCursorManager( rCursorManager ),
+        mrMediaFileManager( rMediaFileManager ),
+        mrViewContainer( rViewContainer ),
+        mxComponentContext( rComponentContext ),
+        mpBox2DWorld( rBox2DWorldPtr )
+    {}
+
+void SlideShowContext::dispose()
+{
+    mxComponentContext.clear();
+}
+
+} // namespace slideshow::internal
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slideshowimpl.cxx b/slideshow/source/engine/slideshowimpl.cxx
new file mode 100644
index 000000000..75b15e5c7
--- /dev/null
+++ b/slideshow/source/engine/slideshowimpl.cxx
@@ -0,0 +1,2439 @@
+/* -*- 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 <config_features.h>
+#include <tools/diagnose_ex.h>
+
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/interfacecontainer.h>
+#include <cppuhelper/supportsservice.hxx>
+
+#include <comphelper/interfacecontainer3.hxx>
+#include <comphelper/scopeguard.hxx>
+#include <comphelper/storagehelper.hxx>
+#include <cppcanvas/polypolygon.hxx>
+#include <osl/thread.hxx>
+
+#include <tools/debug.hxx>
+
+#include <basegfx/point/b2dpoint.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <basegfx/utils/canvastools.hxx>
+
+#include <sal/log.hxx>
+
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/util/XUpdatable.hpp>
+#include <com/sun/star/awt/SystemPointer.hpp>
+#include <com/sun/star/presentation/XSlideShow.hpp>
+#include <com/sun/star/presentation/XSlideShowListener.hpp>
+#include <com/sun/star/lang/NoSupportException.hpp>
+#include <com/sun/star/lang/XMultiServiceFactory.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/drawing/PointSequenceSequence.hpp>
+#include <com/sun/star/drawing/PointSequence.hpp>
+#include <com/sun/star/drawing/XLayer.hpp>
+#include <com/sun/star/drawing/XLayerSupplier.hpp>
+#include <com/sun/star/drawing/XLayerManager.hpp>
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/document/XStorageBasedDocument.hpp>
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/loader/CannotActivateFactoryException.hpp>
+
+#include <unoviewcontainer.hxx>
+#include <transitionfactory.hxx>
+#include <eventmultiplexer.hxx>
+#include <usereventqueue.hxx>
+#include <eventqueue.hxx>
+#include <cursormanager.hxx>
+#include <mediafilemanager.hxx>
+#include <slideshowcontext.hxx>
+#include <activitiesqueue.hxx>
+#include <activitiesfactory.hxx>
+#include <interruptabledelayevent.hxx>
+#include <slide.hxx>
+#include <shapemaps.hxx>
+#include <slideview.hxx>
+#include <tools.hxx>
+#include <unoview.hxx>
+#include "rehearsetimingsactivity.hxx"
+#include "waitsymbol.hxx"
+#include "effectrewinder.hxx"
+#include <framerate.hxx>
+#include "pointersymbol.hxx"
+
+#include <map>
+#include <vector>
+#include <algorithm>
+
+using namespace com::sun::star;
+using namespace ::slideshow::internal;
+
+namespace box2d::utils { class box2DWorld;
+                         typedef ::std::shared_ptr< box2DWorld > Box2DWorldSharedPtr; }
+
+namespace {
+
+/** During animations the update() method tells its caller to call it as
+    soon as possible.  This gives us more time to render the next frame and
+    still maintain a steady frame rate.  This class is responsible for
+    synchronizing the display of new frames and thus keeping the frame rate
+    steady.
+*/
+class FrameSynchronization
+{
+public:
+    /** Create new object with a predefined duration between two frames.
+        @param nFrameDuration
+            The preferred duration between the display of two frames in
+            seconds.
+    */
+    explicit FrameSynchronization (const double nFrameDuration);
+
+    /** Set the current time as the time at which the current frame is
+        displayed.  From this the target time of the next frame is derived.
+    */
+    void MarkCurrentFrame();
+
+    /** When there is time left until the next frame is due then wait.
+        Otherwise return without delay.
+    */
+    void Synchronize();
+
+    /** Activate frame synchronization when an animation is active and
+        frames are to be displayed in a steady rate.  While active
+        Synchronize() will wait until the frame duration time has passed.
+    */
+    void Activate();
+
+    /** Deactivate frame synchronization when no animation is active and the
+        time between frames depends on user actions and other external
+        sources.  While deactivated Synchronize() will return without delay.
+    */
+    void Deactivate();
+
+private:
+    /** The timer that is used for synchronization is independent from the
+        one used by SlideShowImpl: it is not paused or modified by
+        animations.
+    */
+    canvas::tools::ElapsedTime maTimer;
+    /** Time between the display of frames.  Enforced only when mbIsActive
+        is <TRUE/>.
+    */
+    const double mnFrameDuration;
+    /** Time (of maTimer) when the next frame shall be displayed.
+        Synchronize() will wait until this time.
+    */
+    double mnNextFrameTargetTime;
+    /** Synchronize() will wait only when this flag is <TRUE/>.  Otherwise
+        it returns immediately.
+    */
+    bool mbIsActive;
+};
+
+/******************************************************************************
+
+   SlideShowImpl
+
+   This class encapsulates the slideshow presentation viewer.
+
+   With an instance of this class, it is possible to statically
+   and dynamically show a presentation, as defined by the
+   constructor-provided draw model (represented by a sequence
+   of css::drawing::XDrawPage objects).
+
+   It is possible to show the presentation on multiple views
+   simultaneously (e.g. for a multi-monitor setup). Since this
+   class also relies on user interaction, the corresponding
+   XSlideShowView interface provides means to register some UI
+   event listeners (mostly borrowed from awt::XWindow interface).
+
+   Since currently (mid 2004), OOo isn't very well suited to
+   multi-threaded rendering, this class relies on <em>very
+   frequent</em> external update() calls, which will render the
+   next frame of animations. This works as follows: after the
+   displaySlide() has been successfully called (which setup and
+   starts an actual slide show), the update() method must be
+   called until it returns false.
+   Effectively, this puts the burden of providing
+   concurrency to the clients of this class, which, as noted
+   above, is currently unavoidable with the current state of
+   affairs (I've actually tried threading here, but failed
+   miserably when using the VCL canvas as the render backend -
+   deadlocked).
+
+ ******************************************************************************/
+
+typedef cppu::WeakComponentImplHelper<css::lang::XServiceInfo, presentation::XSlideShow> SlideShowImplBase;
+
+typedef ::std::vector< ::cppcanvas::PolyPolygonSharedPtr> PolyPolygonVector;
+
+/// Maps XDrawPage for annotations persistence
+typedef ::std::map< css::uno::Reference<
+                                    css::drawing::XDrawPage>,
+                                    PolyPolygonVector>  PolygonMap;
+
+class SlideShowImpl : private cppu::BaseMutex,
+                      public CursorManager,
+                      public MediaFileManager,
+                      public SlideShowImplBase
+{
+public:
+    explicit SlideShowImpl(
+        uno::Reference<uno::XComponentContext> const& xContext );
+
+    /** Notify that the transition phase of the current slide
+        has ended.
+
+        The life of a slide has three phases: the transition
+        phase, when the previous slide vanishes, and the
+        current slide becomes visible, the shape animation
+        phase, when shape effects are running, and the phase
+        after the last shape animation has ended, but before
+        the next slide transition starts.
+
+        This method notifies the end of the first phase.
+
+        @param bPaintSlide
+        When true, Slide::show() is passed a true as well, denoting
+        explicit paint of slide content. Pass false here, if e.g. a
+        slide transition has already rendered the initial slide image.
+    */
+    void notifySlideTransitionEnded( bool bPaintSlide );
+
+    /** Notify that the shape animation phase of the current slide
+        has ended.
+
+        The life of a slide has three phases: the transition
+        phase, when the previous slide vanishes, and the
+        current slide becomes visible, the shape animation
+        phase, when shape effects are running, and the phase
+        after the last shape animation has ended, but before
+        the next slide transition starts.
+
+        This method notifies the end of the second phase.
+    */
+    void notifySlideAnimationsEnded();
+
+    /** Notify that the slide has ended.
+
+        The life of a slide has three phases: the transition
+        phase, when the previous slide vanishes, and the
+        current slide becomes visible, the shape animation
+        phase, when shape effects are running, and the phase
+        after the last shape animation has ended, but before
+        the next slide transition starts.
+
+        This method notifies the end of the third phase.
+    */
+    void notifySlideEnded (const bool bReverse);
+
+    /** Notification from eventmultiplexer that a hyperlink
+        has been clicked.
+    */
+    bool notifyHyperLinkClicked( OUString const& hyperLink );
+
+    /** Notification from eventmultiplexer that an animation event has occurred.
+        This will be forwarded to all registered XSlideShowListener
+     */
+    bool handleAnimationEvent( const AnimationNodeSharedPtr& rNode );
+
+    /** Obtain a MediaTempFile for the specified url. */
+    virtual std::shared_ptr<avmedia::MediaTempFile> getMediaTempFile(const OUString& aUrl) override;
+
+private:
+    // XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
+    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames () override;
+
+    // XSlideShow:
+    virtual sal_Bool SAL_CALL nextEffect() override;
+    virtual sal_Bool SAL_CALL previousEffect() override;
+    virtual sal_Bool SAL_CALL startShapeActivity(
+        uno::Reference<drawing::XShape> const& xShape ) override;
+    virtual sal_Bool SAL_CALL stopShapeActivity(
+        uno::Reference<drawing::XShape> const& xShape ) override;
+    virtual sal_Bool SAL_CALL pause( sal_Bool bPauseShow ) override;
+    virtual uno::Reference<drawing::XDrawPage> SAL_CALL getCurrentSlide() override;
+    virtual void SAL_CALL displaySlide(
+        uno::Reference<drawing::XDrawPage> const& xSlide,
+        uno::Reference<drawing::XDrawPagesSupplier> const& xDrawPages,
+        uno::Reference<animations::XAnimationNode> const& xRootNode,
+        uno::Sequence<beans::PropertyValue> const& rProperties ) override;
+    virtual void SAL_CALL registerUserPaintPolygons( const css::uno::Reference< css::lang::XMultiServiceFactory >& xDocFactory ) override;
+    virtual sal_Bool SAL_CALL setProperty(
+        beans::PropertyValue const& rProperty ) override;
+    virtual sal_Bool SAL_CALL addView(
+        uno::Reference<presentation::XSlideShowView> const& xView ) override;
+    virtual sal_Bool SAL_CALL removeView(
+        uno::Reference<presentation::XSlideShowView> const& xView ) override;
+    virtual sal_Bool SAL_CALL update( double & nNextTimeout ) override;
+    virtual void SAL_CALL addSlideShowListener(
+        uno::Reference<presentation::XSlideShowListener> const& xListener ) override;
+    virtual void SAL_CALL removeSlideShowListener(
+        uno::Reference<presentation::XSlideShowListener> const& xListener ) override;
+    virtual void SAL_CALL addShapeEventListener(
+        uno::Reference<presentation::XShapeEventListener> const& xListener,
+        uno::Reference<drawing::XShape> const& xShape ) override;
+    virtual void SAL_CALL removeShapeEventListener(
+        uno::Reference<presentation::XShapeEventListener> const& xListener,
+        uno::Reference<drawing::XShape> const& xShape ) override;
+    virtual void SAL_CALL setShapeCursor(
+        uno::Reference<drawing::XShape> const& xShape, sal_Int16 nPointerShape ) override;
+
+    // CursorManager
+
+
+    virtual bool requestCursor( sal_Int16 nCursorShape ) override;
+    virtual void resetCursor() override;
+
+    /** This is somewhat similar to displaySlide when called for the current
+        slide.  It has been simplified to take advantage of that no slide
+        change takes place.  Furthermore it does not show the slide
+        transition.
+    */
+    void redisplayCurrentSlide();
+
+protected:
+    // WeakComponentImplHelperBase
+    virtual void SAL_CALL disposing() override;
+
+    bool isDisposed() const
+    {
+        return (rBHelper.bDisposed || rBHelper.bInDispose);
+    }
+
+private:
+    struct SeparateListenerImpl; friend struct SeparateListenerImpl;
+    class PrefetchPropertiesFunc; friend class PrefetchPropertiesFunc;
+
+    /// Stop currently running show.
+    void stopShow();
+
+    ///Find a polygons vector in maPolygons (map)
+    PolygonMap::iterator findPolygons( uno::Reference<drawing::XDrawPage> const& xDrawPage);
+
+    /// Creates a new slide.
+    SlideSharedPtr makeSlide(
+        uno::Reference<drawing::XDrawPage> const& xDrawPage,
+        uno::Reference<drawing::XDrawPagesSupplier> const& xDrawPages,
+        uno::Reference<animations::XAnimationNode> const& xRootNode );
+
+    /// Checks whether the given slide/animation node matches mpPrefetchSlide
+    static bool matches(
+        SlideSharedPtr const& pSlide,
+        uno::Reference<drawing::XDrawPage> const& xSlide,
+        uno::Reference<animations::XAnimationNode> const& xNode )
+    {
+        if (pSlide)
+            return (pSlide->getXDrawPage() == xSlide &&
+                    pSlide->getXAnimationNode() == xNode);
+        else
+            return (!xSlide.is() && !xNode.is());
+    }
+
+    /// Resets the current slide transition sound object with a new one:
+    SoundPlayerSharedPtr resetSlideTransitionSound(
+        uno::Any const& url, bool bLoopSound );
+
+    /// stops the current slide transition sound
+    void stopSlideTransitionSound();
+
+    /** Prepare a slide transition
+
+        This method registers all necessary events and
+        activities for a slide transition.
+
+        @return the slide change activity, or NULL for no transition effect
+    */
+    ActivitySharedPtr createSlideTransition(
+        const uno::Reference< drawing::XDrawPage >&    xDrawPage,
+        const SlideSharedPtr&                          rLeavingSlide,
+        const SlideSharedPtr&                          rEnteringSlide,
+        const EventSharedPtr&                          rTransitionEndEvent );
+
+    /** Request/release the wait symbol.  The wait symbol is displayed when
+        there are more requests then releases.  Locking the wait symbol
+        helps to avoid intermediate repaints.
+
+        Do not call this method directly.  Use WaitSymbolLock instead.
+    */
+    void requestWaitSymbol();
+    void releaseWaitSymbol();
+
+    class WaitSymbolLock {public:
+        explicit WaitSymbolLock(SlideShowImpl& rSlideShowImpl) : mrSlideShowImpl(rSlideShowImpl)
+            { mrSlideShowImpl.requestWaitSymbol(); }
+        ~WaitSymbolLock()
+            { mrSlideShowImpl.releaseWaitSymbol(); }
+    private: SlideShowImpl& mrSlideShowImpl;
+    };
+
+    /// Filter requested cursor shape against hard slideshow cursors (wait, etc.)
+    sal_Int16 calcActiveCursor( sal_Int16 nCursorShape ) const;
+
+    /** This method is called asynchronously to finish the rewinding of an
+        effect to the previous slide that was initiated earlier.
+    */
+    void rewindEffectToPreviousSlide();
+
+    /// all registered views
+    UnoViewContainer                        maViewContainer;
+
+    /// all registered slide show listeners
+    comphelper::OInterfaceContainerHelper3<presentation::XSlideShowListener> maListenerContainer;
+
+    /// map of vectors, containing all registered listeners for a shape
+    ShapeEventListenerMap                   maShapeEventListeners;
+    /// map of sal_Int16 values, specifying the mouse cursor for every shape
+    ShapeCursorMap                          maShapeCursors;
+
+    //map of vector of Polygons, containing polygons drawn on each slide.
+    PolygonMap                              maPolygons;
+
+    std::optional<RGBColor>               maUserPaintColor;
+
+    double                                  maUserPaintStrokeWidth;
+
+    //changed for the eraser project
+    std::optional<bool>           maEraseAllInk;
+    std::optional<sal_Int32>          maEraseInk;
+    //end changed
+
+    std::shared_ptr<canvas::tools::ElapsedTime> mpPresTimer;
+    ScreenUpdater                           maScreenUpdater;
+    EventQueue                              maEventQueue;
+    EventMultiplexer                        maEventMultiplexer;
+    ActivitiesQueue                         maActivitiesQueue;
+    UserEventQueue                          maUserEventQueue;
+    SubsettableShapeManagerSharedPtr        mpDummyPtr;
+    box2d::utils::Box2DWorldSharedPtr       mpBox2DDummyPtr;
+
+    std::shared_ptr<SeparateListenerImpl> mpListener;
+
+    std::shared_ptr<RehearseTimingsActivity> mpRehearseTimingsActivity;
+    std::shared_ptr<WaitSymbol>           mpWaitSymbol;
+
+    std::shared_ptr<PointerSymbol>        mpPointerSymbol;
+
+    /// the current slide transition sound object:
+    SoundPlayerSharedPtr                    mpCurrentSlideTransitionSound;
+
+    uno::Reference<uno::XComponentContext>  mxComponentContext;
+    uno::Reference<
+        presentation::XTransitionFactory>   mxOptionalTransitionFactory;
+
+    /// the previously running slide
+    SlideSharedPtr                          mpPreviousSlide;
+    /// the currently running slide
+    SlideSharedPtr                          mpCurrentSlide;
+    /// the already prefetched slide: best candidate for upcoming slide
+    SlideSharedPtr                          mpPrefetchSlide;
+    /// slide to be prefetched: best candidate for upcoming slide
+    uno::Reference<drawing::XDrawPage>      mxPrefetchSlide;
+    ///  save the XDrawPagesSupplier to retrieve polygons
+    uno::Reference<drawing::XDrawPagesSupplier>  mxDrawPagesSupplier;
+    ///  Used by MediaFileManager, for media files with package url.
+    uno::Reference<document::XStorageBasedDocument> mxSBD;
+    /// slide animation to be prefetched:
+    uno::Reference<animations::XAnimationNode> mxPrefetchAnimationNode;
+
+    sal_Int16                               mnCurrentCursor;
+
+    sal_Int32                               mnWaitSymbolRequestCount;
+    bool                                    mbAutomaticAdvancementMode;
+    bool                                    mbImageAnimationsAllowed;
+    bool                                    mbNoSlideTransitions;
+    bool                                    mbMouseVisible;
+    bool                                    mbForceManualAdvance;
+    bool                                    mbShowPaused;
+    bool                                    mbSlideShowIdle;
+    bool                                    mbDisableAnimationZOrder;
+
+    EffectRewinder                          maEffectRewinder;
+    FrameSynchronization                    maFrameSynchronization;
+};
+
+/** Separate event listener for animation, view and hyperlink events.
+
+    This handler is registered for slide animation end, view and
+    hyperlink events at the global EventMultiplexer, and forwards
+    notifications to the SlideShowImpl
+*/
+struct SlideShowImpl::SeparateListenerImpl : public EventHandler,
+                                             public ViewRepaintHandler,
+                                             public HyperlinkHandler,
+                                             public AnimationEventHandler
+{
+    SlideShowImpl& mrShow;
+    ScreenUpdater& mrScreenUpdater;
+    EventQueue&    mrEventQueue;
+
+    SeparateListenerImpl( SlideShowImpl& rShow,
+                          ScreenUpdater& rScreenUpdater,
+                          EventQueue&    rEventQueue ) :
+        mrShow( rShow ),
+        mrScreenUpdater( rScreenUpdater ),
+        mrEventQueue( rEventQueue )
+    {}
+
+    SeparateListenerImpl( const SeparateListenerImpl& ) = delete;
+    SeparateListenerImpl& operator=( const SeparateListenerImpl& ) = delete;
+
+    // EventHandler
+    virtual bool handleEvent() override
+    {
+        // DON't call notifySlideAnimationsEnded()
+        // directly, but queue an event. handleEvent()
+        // might be called from e.g.
+        // showNext(), and notifySlideAnimationsEnded() must not be called
+        // in recursion.  Note that the event is scheduled for the next
+        // frame so that its expensive execution does not come in between
+        // sprite hiding and shape redraw (at the end of the animation of a
+        // shape), which would cause a flicker.
+        mrEventQueue.addEventForNextRound(
+            makeEvent( [this] () { this->mrShow.notifySlideAnimationsEnded(); },
+                "SlideShowImpl::notifySlideAnimationsEnded"));
+        return true;
+    }
+
+    // ViewRepaintHandler
+    virtual void viewClobbered( const UnoViewSharedPtr& rView ) override
+    {
+        // given view needs repaint, request update
+        mrScreenUpdater.notifyUpdate(rView, true);
+    }
+
+    // HyperlinkHandler
+    virtual bool handleHyperlink( OUString const& rLink ) override
+    {
+        return mrShow.notifyHyperLinkClicked(rLink);
+    }
+
+    // AnimationEventHandler
+    virtual bool handleAnimationEvent( const AnimationNodeSharedPtr& rNode ) override
+    {
+        return mrShow.handleAnimationEvent(rNode);
+    }
+};
+
+SlideShowImpl::SlideShowImpl(
+    uno::Reference<uno::XComponentContext> const& xContext )
+    : SlideShowImplBase(m_aMutex),
+      maViewContainer(),
+      maListenerContainer( m_aMutex ),
+      maShapeEventListeners(),
+      maShapeCursors(),
+      maUserPaintColor(),
+      maUserPaintStrokeWidth(4.0),
+      mpPresTimer( std::make_shared<canvas::tools::ElapsedTime>() ),
+      maScreenUpdater(maViewContainer),
+      maEventQueue( mpPresTimer ),
+      maEventMultiplexer( maEventQueue,
+                          maViewContainer ),
+      maActivitiesQueue( mpPresTimer ),
+      maUserEventQueue( maEventMultiplexer,
+                        maEventQueue,
+                        *this ),
+      mpDummyPtr(),
+      mpBox2DDummyPtr(),
+      mpListener(),
+      mpRehearseTimingsActivity(),
+      mpWaitSymbol(),
+      mpPointerSymbol(),
+      mpCurrentSlideTransitionSound(),
+      mxComponentContext( xContext ),
+      mxOptionalTransitionFactory(),
+      mpCurrentSlide(),
+      mpPrefetchSlide(),
+      mxPrefetchSlide(),
+      mxDrawPagesSupplier(),
+      mxSBD(),
+      mxPrefetchAnimationNode(),
+      mnCurrentCursor(awt::SystemPointer::ARROW),
+      mnWaitSymbolRequestCount(0),
+      mbAutomaticAdvancementMode(false),
+      mbImageAnimationsAllowed( true ),
+      mbNoSlideTransitions( false ),
+      mbMouseVisible( true ),
+      mbForceManualAdvance( false ),
+      mbShowPaused( false ),
+      mbSlideShowIdle( true ),
+      mbDisableAnimationZOrder( false ),
+      maEffectRewinder(maEventMultiplexer, maEventQueue, maUserEventQueue),
+      maFrameSynchronization(1.0 / FrameRate::PreferredFramesPerSecond)
+
+{
+    // keep care not constructing any UNO references to this inside ctor,
+    // shift that code to create()!
+
+    uno::Reference<lang::XMultiComponentFactory> xFactory(
+        mxComponentContext->getServiceManager() );
+
+    if( xFactory.is() )
+    {
+        try
+    {
+            // #i82460# try to retrieve special transition factory
+            mxOptionalTransitionFactory.set(
+                xFactory->createInstanceWithContext(
+                    "com.sun.star.presentation.TransitionFactory",
+                    mxComponentContext ),
+                uno::UNO_QUERY );
+        }
+        catch (loader::CannotActivateFactoryException const&)
+    {
+    }
+    }
+
+    mpListener = std::make_shared<SeparateListenerImpl>(
+                          *this,
+                          maScreenUpdater,
+                          maEventQueue );
+    maEventMultiplexer.addSlideAnimationsEndHandler( mpListener );
+    maEventMultiplexer.addViewRepaintHandler( mpListener );
+    maEventMultiplexer.addHyperlinkHandler( mpListener, 0.0 );
+    maEventMultiplexer.addAnimationStartHandler( mpListener );
+    maEventMultiplexer.addAnimationEndHandler( mpListener );
+}
+
+// we are about to be disposed (someone call dispose() on us)
+void SlideShowImpl::disposing()
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    maEffectRewinder.dispose();
+
+    // stop slide transition sound, if any:
+    stopSlideTransitionSound();
+
+    mxComponentContext.clear();
+
+    if( mpCurrentSlideTransitionSound )
+    {
+        mpCurrentSlideTransitionSound->dispose();
+        mpCurrentSlideTransitionSound.reset();
+    }
+
+    mpWaitSymbol.reset();
+    mpPointerSymbol.reset();
+
+    if( mpRehearseTimingsActivity )
+    {
+        mpRehearseTimingsActivity->dispose();
+        mpRehearseTimingsActivity.reset();
+    }
+
+    if( mpListener )
+    {
+        maEventMultiplexer.removeSlideAnimationsEndHandler(mpListener);
+        maEventMultiplexer.removeViewRepaintHandler(mpListener);
+        maEventMultiplexer.removeHyperlinkHandler(mpListener);
+        maEventMultiplexer.removeAnimationStartHandler( mpListener );
+        maEventMultiplexer.removeAnimationEndHandler( mpListener );
+
+        mpListener.reset();
+    }
+
+    maUserEventQueue.clear();
+    maActivitiesQueue.clear();
+    maEventMultiplexer.clear();
+    maEventQueue.clear();
+    mpPresTimer.reset();
+    maShapeCursors.clear();
+    maShapeEventListeners.clear();
+
+    // send all listeners a disposing() that we are going down:
+    maListenerContainer.disposeAndClear(
+        lang::EventObject( static_cast<cppu::OWeakObject *>(this) ) );
+
+    maViewContainer.dispose();
+
+    // release slides:
+    mxPrefetchAnimationNode.clear();
+    mxPrefetchSlide.clear();
+    mpPrefetchSlide.reset();
+    mpCurrentSlide.reset();
+    mpPreviousSlide.reset();
+}
+
+uno::Sequence< OUString > SAL_CALL SlideShowImpl::getSupportedServiceNames()
+{
+    return { "com.sun.star.presentation.SlideShow" };
+}
+
+OUString SAL_CALL SlideShowImpl::getImplementationName()
+{
+    return "com.sun.star.comp.presentation.SlideShow";
+}
+
+sal_Bool SAL_CALL SlideShowImpl::supportsService(const OUString& aServiceName)
+{
+    return cppu::supportsService(this, aServiceName);
+}
+
+/// stops the current slide transition sound
+void SlideShowImpl::stopSlideTransitionSound()
+{
+    if (mpCurrentSlideTransitionSound)
+    {
+        mpCurrentSlideTransitionSound->stopPlayback();
+        mpCurrentSlideTransitionSound->dispose();
+        mpCurrentSlideTransitionSound.reset();
+    }
+ }
+
+SoundPlayerSharedPtr SlideShowImpl::resetSlideTransitionSound( const uno::Any& rSound, bool bLoopSound )
+{
+    bool bStopSound = false;
+    OUString url;
+
+    if( !(rSound >>= bStopSound) )
+        bStopSound = false;
+    rSound >>= url;
+
+    if( !bStopSound && url.isEmpty() )
+        return SoundPlayerSharedPtr();
+
+    stopSlideTransitionSound();
+
+    if (!url.isEmpty())
+    {
+        try
+        {
+            mpCurrentSlideTransitionSound = SoundPlayer::create(
+                maEventMultiplexer, url, mxComponentContext, *this);
+            mpCurrentSlideTransitionSound->setPlaybackLoop( bLoopSound );
+        }
+        catch (lang::NoSupportException const&)
+        {
+            // catch possible exceptions from SoundPlayer, since
+            // being not able to playback the sound is not a hard
+            // error here (still, the slide transition should be
+            // shown).
+        }
+    }
+    return mpCurrentSlideTransitionSound;
+}
+
+ActivitySharedPtr SlideShowImpl::createSlideTransition(
+    const uno::Reference< drawing::XDrawPage >& xDrawPage,
+    const SlideSharedPtr&                       rLeavingSlide,
+    const SlideSharedPtr&                       rEnteringSlide,
+    const EventSharedPtr&                       rTransitionEndEvent)
+{
+    ENSURE_OR_THROW( !maViewContainer.empty(),
+                      "createSlideTransition(): No views" );
+    ENSURE_OR_THROW( rEnteringSlide,
+                      "createSlideTransition(): No entering slide" );
+
+    // return empty transition, if slide transitions
+    // are disabled.
+    if (mbNoSlideTransitions)
+        return ActivitySharedPtr();
+
+    // retrieve slide change parameters from XDrawPage
+    uno::Reference< beans::XPropertySet > xPropSet( xDrawPage,
+                                                    uno::UNO_QUERY );
+
+    if( !xPropSet.is() )
+    {
+        SAL_INFO("slideshow", "createSlideTransition(): "
+                   "Slide has no PropertySet - assuming no transition" );
+        return ActivitySharedPtr();
+    }
+
+    sal_Int16 nTransitionType(0);
+    if( !getPropertyValue( nTransitionType,
+                           xPropSet,
+                           "TransitionType") )
+    {
+        SAL_INFO("slideshow", "createSlideTransition(): "
+                   "Could not extract slide transition type from XDrawPage - assuming no transition" );
+        return ActivitySharedPtr();
+    }
+
+    sal_Int16 nTransitionSubType(0);
+    if( !getPropertyValue( nTransitionSubType,
+                           xPropSet,
+                           "TransitionSubtype") )
+    {
+        SAL_INFO("slideshow", "createSlideTransition(): "
+                   "Could not extract slide transition subtype from XDrawPage - assuming no transition" );
+        return ActivitySharedPtr();
+    }
+
+    bool bTransitionDirection(false);
+    if( !getPropertyValue( bTransitionDirection,
+                           xPropSet,
+                           "TransitionDirection") )
+    {
+        SAL_INFO("slideshow", "createSlideTransition(): "
+                   "Could not extract slide transition direction from XDrawPage - assuming default direction" );
+    }
+
+    sal_Int32 aUnoColor(0);
+    if( !getPropertyValue( aUnoColor,
+                           xPropSet,
+                           "TransitionFadeColor") )
+    {
+        SAL_INFO("slideshow", "createSlideTransition(): "
+                   "Could not extract slide transition fade color from XDrawPage - assuming black" );
+    }
+
+    const RGBColor aTransitionFadeColor( unoColor2RGBColor( aUnoColor ));
+
+    uno::Any aSound;
+    bool bLoopSound = false;
+
+    if( !getPropertyValue( aSound, xPropSet, "Sound") )
+        SAL_INFO("slideshow", "createSlideTransition(): Could not determine transition sound effect URL from XDrawPage - using no sound" );
+
+    if( !getPropertyValue( bLoopSound, xPropSet, "LoopSound" ) )
+        SAL_INFO("slideshow", "createSlideTransition(): Could not get slide property 'LoopSound' - using no sound" );
+
+    NumberAnimationSharedPtr pTransition(
+        TransitionFactory::createSlideTransition(
+            rLeavingSlide,
+            rEnteringSlide,
+            maViewContainer,
+            maScreenUpdater,
+            maEventMultiplexer,
+            mxOptionalTransitionFactory,
+            nTransitionType,
+            nTransitionSubType,
+            bTransitionDirection,
+            aTransitionFadeColor,
+            resetSlideTransitionSound( aSound, bLoopSound ) ));
+
+    if( !pTransition )
+        return ActivitySharedPtr(); // no transition effect has been
+                                    // generated. Normally, that means
+                                    // that simply no transition is
+                                    // set on this slide.
+
+    double nTransitionDuration(0.0);
+    if( !getPropertyValue( nTransitionDuration,
+                           xPropSet,
+                           "TransitionDuration") )
+    {
+        SAL_INFO("slideshow", "createSlideTransition(): "
+                   "Could not extract slide transition duration from XDrawPage - assuming no transition" );
+        return ActivitySharedPtr();
+    }
+
+    sal_Int32 nMinFrames(5);
+    if( !getPropertyValue( nMinFrames,
+                           xPropSet,
+                           "MinimalFrameNumber") )
+    {
+        SAL_INFO("slideshow", "createSlideTransition(): "
+                   "No minimal number of frames given - assuming 5" );
+    }
+
+    // prefetch slide transition bitmaps, but postpone it after
+    // displaySlide() has finished - sometimes, view size has not yet
+    // reached final size
+    maEventQueue.addEvent(
+        makeEvent( [pTransition] () {
+                        pTransition->prefetch(); },
+            "Animation::prefetch"));
+
+    return ActivitySharedPtr(
+        ActivitiesFactory::createSimpleActivity(
+            ActivitiesFactory::CommonParameters(
+                rTransitionEndEvent,
+                maEventQueue,
+                maActivitiesQueue,
+                nTransitionDuration,
+                nMinFrames,
+                false,
+                std::optional<double>(1.0),
+                0.0,
+                0.0,
+                ShapeSharedPtr(),
+                basegfx::B2DSize( rEnteringSlide->getSlideSize() ) ),
+            pTransition,
+            true ));
+}
+
+PolygonMap::iterator SlideShowImpl::findPolygons( uno::Reference<drawing::XDrawPage> const& xDrawPage)
+{
+    // TODO(P2): optimize research in the map.
+    return maPolygons.find(xDrawPage);
+}
+
+SlideSharedPtr SlideShowImpl::makeSlide(
+    uno::Reference<drawing::XDrawPage> const&          xDrawPage,
+    uno::Reference<drawing::XDrawPagesSupplier> const& xDrawPages,
+    uno::Reference<animations::XAnimationNode> const&  xRootNode )
+{
+    if( !xDrawPage.is() )
+        return SlideSharedPtr();
+
+    //Retrieve polygons for the current slide
+    PolygonMap::iterator aIter = findPolygons(xDrawPage);
+
+    const SlideSharedPtr pSlide( createSlide(xDrawPage,
+                                             xDrawPages,
+                                             xRootNode,
+                                             maEventQueue,
+                                             maEventMultiplexer,
+                                             maScreenUpdater,
+                                             maActivitiesQueue,
+                                             maUserEventQueue,
+                                             *this,
+                                             *this,
+                                             maViewContainer,
+                                             mxComponentContext,
+                                             maShapeEventListeners,
+                                             maShapeCursors,
+                                             (aIter != maPolygons.end()) ? aIter->second :  PolyPolygonVector(),
+                                             maUserPaintColor ? *maUserPaintColor : RGBColor(),
+                                             maUserPaintStrokeWidth,
+                                             !!maUserPaintColor,
+                                             mbImageAnimationsAllowed,
+                                             mbDisableAnimationZOrder) );
+
+    // prefetch show content (reducing latency for slide
+    // bitmap and effect start later on)
+    pSlide->prefetch();
+
+    return pSlide;
+}
+
+void SlideShowImpl::requestWaitSymbol()
+{
+    ++mnWaitSymbolRequestCount;
+    OSL_ASSERT(mnWaitSymbolRequestCount>0);
+
+    if (mnWaitSymbolRequestCount == 1)
+    {
+        if( !mpWaitSymbol )
+        {
+            // fall back to cursor
+            requestCursor(calcActiveCursor(mnCurrentCursor));
+        }
+        else
+            mpWaitSymbol->show();
+    }
+}
+
+void SlideShowImpl::releaseWaitSymbol()
+{
+    --mnWaitSymbolRequestCount;
+    OSL_ASSERT(mnWaitSymbolRequestCount>=0);
+
+    if (mnWaitSymbolRequestCount == 0)
+    {
+        if( !mpWaitSymbol )
+        {
+            // fall back to cursor
+            requestCursor(calcActiveCursor(mnCurrentCursor));
+        }
+        else
+            mpWaitSymbol->hide();
+    }
+}
+
+sal_Int16 SlideShowImpl::calcActiveCursor( sal_Int16 nCursorShape ) const
+{
+    if( mnWaitSymbolRequestCount>0 && !mpWaitSymbol ) // enforce wait cursor
+        nCursorShape = awt::SystemPointer::WAIT;
+    else if( !mbMouseVisible ) // enforce INVISIBLE
+        nCursorShape = awt::SystemPointer::INVISIBLE;
+    else if( maUserPaintColor &&
+             nCursorShape == awt::SystemPointer::ARROW )
+        nCursorShape = awt::SystemPointer::PEN;
+
+    return nCursorShape;
+}
+
+void SlideShowImpl::stopShow()
+{
+    // Force-end running animation
+    // ===========================
+    if (mpCurrentSlide)
+    {
+        mpCurrentSlide->hide();
+        //Register polygons in the map
+        if(findPolygons(mpCurrentSlide->getXDrawPage()) != maPolygons.end())
+            maPolygons.erase(mpCurrentSlide->getXDrawPage());
+
+        maPolygons.insert(make_pair(mpCurrentSlide->getXDrawPage(),mpCurrentSlide->getPolygons()));
+    }
+
+    // clear all queues
+    maEventQueue.clear();
+    maActivitiesQueue.clear();
+
+    // Attention: we MUST clear the user event queue here,
+    // this is because the current slide might have registered
+    // shape events (click or enter/leave), which might
+    // otherwise dangle forever in the queue (because of the
+    // shared ptr nature). If someone needs to change this:
+    // somehow unregister those shapes at the user event queue
+    // on notifySlideEnded().
+    maUserEventQueue.clear();
+
+    // re-enable automatic effect advancement
+    // (maEventQueue.clear() above might have killed
+    // maEventMultiplexer's tick events)
+    if (mbAutomaticAdvancementMode)
+    {
+        // toggle automatic mode (enabling just again is
+        // ignored by EventMultiplexer)
+        maEventMultiplexer.setAutomaticMode( false );
+        maEventMultiplexer.setAutomaticMode( true );
+    }
+}
+
+class SlideShowImpl::PrefetchPropertiesFunc
+{
+public:
+    PrefetchPropertiesFunc( SlideShowImpl * that_,
+        bool& rbSkipAllMainSequenceEffects,
+        bool& rbSkipSlideTransition)
+        : mpSlideShowImpl(that_),
+          mrbSkipAllMainSequenceEffects(rbSkipAllMainSequenceEffects),
+          mrbSkipSlideTransition(rbSkipSlideTransition)
+    {}
+
+    void operator()( beans::PropertyValue const& rProperty ) const {
+        if (rProperty.Name == "Prefetch" )
+        {
+            uno::Sequence<uno::Any> seq;
+            if ((rProperty.Value >>= seq) && seq.getLength() == 2)
+            {
+                seq[0] >>= mpSlideShowImpl->mxPrefetchSlide;
+                seq[1] >>= mpSlideShowImpl->mxPrefetchAnimationNode;
+            }
+        }
+        else if ( rProperty.Name == "SkipAllMainSequenceEffects" )
+        {
+            rProperty.Value >>= mrbSkipAllMainSequenceEffects;
+        }
+        else if ( rProperty.Name == "SkipSlideTransition" )
+        {
+            rProperty.Value >>= mrbSkipSlideTransition;
+        }
+        else
+        {
+            SAL_WARN( "slideshow", rProperty.Name );
+        }
+    }
+private:
+    SlideShowImpl *const mpSlideShowImpl;
+    bool& mrbSkipAllMainSequenceEffects;
+    bool& mrbSkipSlideTransition;
+};
+
+void SlideShowImpl::displaySlide(
+    uno::Reference<drawing::XDrawPage> const& xSlide,
+    uno::Reference<drawing::XDrawPagesSupplier> const& xDrawPages,
+    uno::Reference<animations::XAnimationNode> const& xRootNode,
+    uno::Sequence<beans::PropertyValue> const& rProperties )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return;
+
+    maEffectRewinder.setRootAnimationNode(xRootNode);
+    maEffectRewinder.setCurrentSlide(xSlide);
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    mxDrawPagesSupplier = xDrawPages;
+    mxSBD = uno::Reference<document::XStorageBasedDocument>(mxDrawPagesSupplier, uno::UNO_QUERY);
+
+    stopShow();  // MUST call that: results in
+    // maUserEventQueue.clear(). What's more,
+    // stopShow()'s currSlide->hide() call is
+    // now also required, notifySlideEnded()
+    // relies on that
+    // unconditionally. Otherwise, genuine
+    // shape animations (drawing layer and
+    // GIF) will not be stopped.
+
+    bool bSkipAllMainSequenceEffects (false);
+    bool bSkipSlideTransition (false);
+    std::for_each( rProperties.begin(),
+                   rProperties.end(),
+        PrefetchPropertiesFunc(this, bSkipAllMainSequenceEffects, bSkipSlideTransition) );
+
+    OSL_ENSURE( !maViewContainer.empty(), "### no views!" );
+    if (maViewContainer.empty())
+        return;
+
+    // this here might take some time
+    {
+        WaitSymbolLock aLock (*this);
+
+        mpPreviousSlide = mpCurrentSlide;
+        mpCurrentSlide.reset();
+
+        if (matches( mpPrefetchSlide, xSlide, xRootNode ))
+        {
+            // prefetched slide matches:
+            mpCurrentSlide = mpPrefetchSlide;
+        }
+        else
+            mpCurrentSlide = makeSlide( xSlide, xDrawPages, xRootNode );
+
+        OSL_ASSERT( mpCurrentSlide );
+        if (mpCurrentSlide)
+        {
+            basegfx::B2DSize oldSlideSize;
+            if( mpPreviousSlide )
+                oldSlideSize = basegfx::B2DSize( mpPreviousSlide->getSlideSize() );
+
+            basegfx::B2DSize const slideSize( mpCurrentSlide->getSlideSize() );
+
+            // push new transformation to all views, if size changed
+            if( !mpPreviousSlide || oldSlideSize != slideSize )
+            {
+                for( const auto& pView : maViewContainer )
+                    pView->setViewSize( slideSize );
+
+                // explicitly notify view change here,
+                // because transformation might have changed:
+                // optimization, this->notifyViewChange() would
+                // repaint slide which is not necessary.
+                maEventMultiplexer.notifyViewsChanged();
+            }
+
+            // create slide transition, and add proper end event
+            // (which then starts the slide effects
+            // via CURRENT_SLIDE.show())
+            ActivitySharedPtr pSlideChangeActivity (
+                createSlideTransition(
+                    mpCurrentSlide->getXDrawPage(),
+                    mpPreviousSlide,
+                    mpCurrentSlide,
+                    makeEvent(
+                        [this] () { this->notifySlideTransitionEnded(false); },
+                        "SlideShowImpl::notifySlideTransitionEnded")));
+
+            if (bSkipSlideTransition)
+            {
+                // The transition activity was created for the side effects
+                // (like sound transitions).  Because we want to skip the
+                // actual transition animation we do not need the activity
+                // anymore.
+                pSlideChangeActivity.reset();
+            }
+
+            if (pSlideChangeActivity)
+            {
+                // factory generated a slide transition - activate it!
+                maActivitiesQueue.addActivity( pSlideChangeActivity );
+            }
+            else
+            {
+                // no transition effect on this slide - schedule slide
+                // effect start event right away.
+                maEventQueue.addEvent(
+                    makeEvent(
+                        [this] () { this->notifySlideTransitionEnded(true); },
+                        "SlideShowImpl::notifySlideTransitionEnded"));
+            }
+        }
+    } // finally
+
+    maListenerContainer.forEach(
+        [](uno::Reference<presentation::XSlideShowListener> const& xListener)
+        {
+            xListener->slideTransitionStarted();
+        });
+
+    // We are currently rewinding an effect.  This lead us from the next
+    // slide to this one.  To complete this we have to play back all main
+    // sequence effects on this slide.
+    if (bSkipAllMainSequenceEffects)
+        maEffectRewinder.skipAllMainSequenceEffects();
+}
+
+void SlideShowImpl::redisplayCurrentSlide()
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return;
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+    stopShow();
+
+    OSL_ENSURE( !maViewContainer.empty(), "### no views!" );
+    if (maViewContainer.empty())
+        return;
+
+    // No transition effect on this slide - schedule slide
+    // effect start event right away.
+    maEventQueue.addEvent(
+        makeEvent( [this] () { this->notifySlideTransitionEnded(true); },
+            "SlideShowImpl::notifySlideTransitionEnded"));
+
+    maListenerContainer.forEach(
+        [](uno::Reference<presentation::XSlideShowListener> const& xListener)
+        {
+            xListener->slideTransitionStarted();
+        });
+}
+
+sal_Bool SlideShowImpl::nextEffect()
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return false;
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    if (mbShowPaused)
+        return true;
+    else
+        return maEventMultiplexer.notifyNextEffect();
+}
+
+sal_Bool SlideShowImpl::previousEffect()
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return false;
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    if (mbShowPaused)
+        return true;
+    else
+    {
+        return maEffectRewinder.rewind(
+            maScreenUpdater.createLock(),
+            [this]() { return this->redisplayCurrentSlide(); },
+            [this]() { return this->rewindEffectToPreviousSlide(); } );
+    }
+}
+
+void SlideShowImpl::rewindEffectToPreviousSlide()
+{
+    // Show the wait symbol now and prevent it from showing temporary slide
+    // content while effects are played back.
+    WaitSymbolLock aLock (*this);
+
+    // A previous call to EffectRewinder::Rewind could not rewind the current
+    // effect because there are no effects on the current slide or none has
+    // yet been displayed.  Go to the previous slide.
+    notifySlideEnded(true);
+
+    // Process pending events once more in order to have the following
+    // screen update show the last effect.  Not sure whether this should be
+    // necessary.
+    maEventQueue.forceEmpty();
+
+    // We have to call the screen updater before the wait symbol is turned
+    // off.  Otherwise the wait symbol would force the display of an
+    // intermediate state of the slide (before the effects are replayed.)
+    maScreenUpdater.commitUpdates();
+}
+
+sal_Bool SlideShowImpl::startShapeActivity(
+    uno::Reference<drawing::XShape> const& /*xShape*/ )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    // TODO(F3): NYI
+    OSL_FAIL( "not yet implemented!" );
+    return false;
+}
+
+sal_Bool SlideShowImpl::stopShapeActivity(
+    uno::Reference<drawing::XShape> const& /*xShape*/ )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    // TODO(F3): NYI
+    OSL_FAIL( "not yet implemented!" );
+    return false;
+}
+
+sal_Bool SlideShowImpl::pause( sal_Bool bPauseShow )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return false;
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    if (bPauseShow)
+        mpPresTimer->pauseTimer();
+    else
+        mpPresTimer->continueTimer();
+
+    maEventMultiplexer.notifyPauseMode(bPauseShow);
+
+    mbShowPaused = bPauseShow;
+    return true;
+}
+
+uno::Reference<drawing::XDrawPage> SlideShowImpl::getCurrentSlide()
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return uno::Reference<drawing::XDrawPage>();
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    if (mpCurrentSlide)
+        return mpCurrentSlide->getXDrawPage();
+    else
+        return uno::Reference<drawing::XDrawPage>();
+}
+
+sal_Bool SlideShowImpl::addView(
+    uno::Reference<presentation::XSlideShowView> const& xView )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return false;
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    // first of all, check if view has a valid canvas
+    ENSURE_OR_RETURN_FALSE( xView.is(), "addView(): Invalid view" );
+    ENSURE_OR_RETURN_FALSE( xView->getCanvas().is(),
+                       "addView(): View does not provide a valid canvas" );
+
+    UnoViewSharedPtr const pView( createSlideView(
+                                      xView,
+                                      maEventQueue,
+                                      maEventMultiplexer ));
+    if (!maViewContainer.addView( pView ))
+        return false; // view already added
+
+    // initialize view content
+    // =======================
+
+    if (mpCurrentSlide)
+    {
+        // set view transformation
+        const basegfx::B2ISize slideSize = mpCurrentSlide->getSlideSize();
+        pView->setViewSize( basegfx::B2DSize( slideSize.getX(),
+                                              slideSize.getY() ) );
+    }
+
+    // clear view area (since it's newly added,
+    // we need a clean slate)
+    pView->clearAll();
+
+    // broadcast newly added view
+    maEventMultiplexer.notifyViewAdded( pView );
+
+    // set current mouse ptr
+    pView->setCursorShape( calcActiveCursor(mnCurrentCursor) );
+
+    return true;
+}
+
+sal_Bool SlideShowImpl::removeView(
+    uno::Reference<presentation::XSlideShowView> const& xView )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    ENSURE_OR_RETURN_FALSE( xView.is(), "removeView(): Invalid view" );
+
+    UnoViewSharedPtr const pView( maViewContainer.removeView( xView ) );
+    if( !pView )
+        return false; // view was not added in the first place
+
+    // remove view from EventMultiplexer (mouse events etc.)
+    maEventMultiplexer.notifyViewRemoved( pView );
+
+    pView->_dispose();
+
+    return true;
+}
+
+void SlideShowImpl::registerUserPaintPolygons( const uno::Reference< lang::XMultiServiceFactory >& xDocFactory )
+{
+    //Retrieve Polygons if user ends presentation by context menu
+    if (mpCurrentSlide)
+    {
+        if(findPolygons(mpCurrentSlide->getXDrawPage()) != maPolygons.end())
+            maPolygons.erase(mpCurrentSlide->getXDrawPage());
+
+        maPolygons.insert(make_pair(mpCurrentSlide->getXDrawPage(),mpCurrentSlide->getPolygons()));
+    }
+
+    //Creating the layer for shapes drawn during slideshow
+    // query for the XLayerManager
+    uno::Reference< drawing::XLayerSupplier > xLayerSupplier(xDocFactory, uno::UNO_QUERY);
+    uno::Reference< container::XNameAccess > xNameAccess = xLayerSupplier->getLayerManager();
+    uno::Reference< drawing::XLayerManager > xLayerManager(xNameAccess, uno::UNO_QUERY);
+
+    // create layer
+    uno::Reference< drawing::XLayer > xDrawnInSlideshow;
+    uno::Any aPropLayer;
+    OUString sLayerName = "DrawnInSlideshow";
+    if (xNameAccess->hasByName(sLayerName))
+    {
+        xNameAccess->getByName(sLayerName) >>= xDrawnInSlideshow;
+    }
+    else
+    {
+        xDrawnInSlideshow = xLayerManager->insertNewByIndex(xLayerManager->getCount());
+        aPropLayer <<= sLayerName;
+        xDrawnInSlideshow->setPropertyValue("Name", aPropLayer);
+    }
+
+    // ODF defaults from ctor of SdrLayer are not automatically set on the here
+    // created XLayer. Need to be done explicitly here.
+    aPropLayer <<= true;
+    xDrawnInSlideshow->setPropertyValue("IsVisible", aPropLayer);
+    xDrawnInSlideshow->setPropertyValue("IsPrintable", aPropLayer);
+    aPropLayer <<= false;
+    xDrawnInSlideshow->setPropertyValue("IsLocked", aPropLayer);
+
+    //Register polygons for each slide
+    for( const auto& rPoly : maPolygons )
+    {
+        PolyPolygonVector aPolygons = rPoly.second;
+        //Get shapes for the slide
+        css::uno::Reference< css::drawing::XShapes > Shapes = rPoly.first;
+        //Retrieve polygons for one slide
+        for( const auto& pPolyPoly : aPolygons )
+        {
+            ::basegfx::B2DPolyPolygon b2DPolyPoly = ::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(pPolyPoly->getUNOPolyPolygon());
+
+            //Normally there is only one polygon
+            for(sal_uInt32 i=0; i< b2DPolyPoly.count();i++)
+            {
+                const ::basegfx::B2DPolygon& aPoly =  b2DPolyPoly.getB2DPolygon(i);
+                sal_uInt32 nPoints = aPoly.count();
+
+                if( nPoints > 1)
+                {
+                    //create the PolyLineShape
+                    uno::Reference< uno::XInterface > polyshape(xDocFactory->createInstance(
+                                                                    "com.sun.star.drawing.PolyLineShape" ) );
+                    uno::Reference< drawing::XShape > rPolyShape(polyshape, uno::UNO_QUERY);
+
+                    //Add the shape to the slide
+                    Shapes->add(rPolyShape);
+
+                    //Retrieve shape properties
+                    uno::Reference< beans::XPropertySet > aXPropSet( rPolyShape, uno::UNO_QUERY );
+                    //Construct a sequence of points sequence
+                    drawing::PointSequenceSequence aRetval;
+                    //Create only one sequence for one polygon
+                    aRetval.realloc( 1 );
+                    // Retrieve the sequence of points from aRetval
+                    drawing::PointSequence* pOuterSequence = aRetval.getArray();
+                    // Create 2 points in this sequence
+                    pOuterSequence->realloc(nPoints);
+                    // Get these points which are in an array
+                    awt::Point* pInnerSequence = pOuterSequence->getArray();
+                    for( sal_uInt32 n = 0; n < nPoints; n++ )
+                    {
+                        //Create a point from the polygon
+                        *pInnerSequence++ = awt::Point(
+                            basegfx::fround(aPoly.getB2DPoint(n).getX()),
+                            basegfx::fround(aPoly.getB2DPoint(n).getY()));
+                    }
+
+                    //Fill the properties
+                    //Give the built PointSequenceSequence.
+                    uno::Any aParam;
+                    aParam <<= aRetval;
+                    aXPropSet->setPropertyValue("PolyPolygon", aParam );
+
+                    //LineStyle : SOLID by default
+                    drawing::LineStyle  eLS;
+                    eLS = drawing::LineStyle_SOLID;
+                    aXPropSet->setPropertyValue("LineStyle", uno::Any(eLS) );
+
+                    //LineColor
+                    sal_uInt32          nLineColor;
+                    nLineColor = pPolyPoly->getRGBALineColor();
+                    //Transform polygon color from RRGGBBAA to AARRGGBB
+                    aXPropSet->setPropertyValue("LineColor", uno::Any(RGBAColor2UnoColor(nLineColor)) );
+
+                    //LineWidth
+                    double              fLineWidth;
+                    fLineWidth = pPolyPoly->getStrokeWidth();
+                    aXPropSet->setPropertyValue("LineWidth", uno::Any(static_cast<sal_Int32>(fLineWidth)) );
+
+                    // make polygons special
+                    xLayerManager->attachShapeToLayer(rPolyShape, xDrawnInSlideshow);
+                }
+            }
+        }
+    }
+}
+
+sal_Bool SlideShowImpl::setProperty( beans::PropertyValue const& rProperty )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return false;
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    if ( rProperty.Name == "AutomaticAdvancement" )
+    {
+        double nTimeout(0.0);
+        mbAutomaticAdvancementMode = (rProperty.Value >>= nTimeout);
+        if (mbAutomaticAdvancementMode)
+        {
+            maEventMultiplexer.setAutomaticTimeout( nTimeout );
+        }
+        maEventMultiplexer.setAutomaticMode( mbAutomaticAdvancementMode );
+        return true;
+    }
+
+    if ( rProperty.Name == "UserPaintColor" )
+    {
+        sal_Int32 nColor(0);
+        if (rProperty.Value >>= nColor)
+        {
+            OSL_ENSURE( mbMouseVisible,
+                        "setProperty(): User paint overrides invisible mouse" );
+
+            // enable user paint
+            maUserPaintColor = unoColor2RGBColor(nColor);
+            if( mpCurrentSlide && !mpCurrentSlide->isPaintOverlayActive() )
+                mpCurrentSlide->enablePaintOverlay();
+
+            maEventMultiplexer.notifyUserPaintColor( *maUserPaintColor );
+        }
+        else
+        {
+            // disable user paint
+            maUserPaintColor.reset();
+            maEventMultiplexer.notifyUserPaintDisabled();
+        }
+
+        resetCursor();
+
+        return true;
+    }
+
+    //adding support for erasing features in UserPaintOverlay
+    if ( rProperty.Name == "EraseAllInk" )
+    {
+        bool bEraseAllInk(false);
+        if (rProperty.Value >>= bEraseAllInk)
+        {
+            OSL_ENSURE( mbMouseVisible,
+                        "setProperty(): User paint overrides invisible mouse" );
+
+            // enable user paint
+            maEraseAllInk = bEraseAllInk;
+            maEventMultiplexer.notifyEraseAllInk( *maEraseAllInk );
+        }
+
+        return true;
+    }
+
+    if ( rProperty.Name == "SwitchPenMode" )
+    {
+        bool bSwitchPenMode(false);
+        if (rProperty.Value >>= bSwitchPenMode)
+        {
+            OSL_ENSURE( mbMouseVisible,
+                        "setProperty(): User paint overrides invisible mouse" );
+
+            if(bSwitchPenMode){
+                // Switch to Pen Mode
+                maEventMultiplexer.notifySwitchPenMode();
+            }
+        }
+        return true;
+    }
+
+    if ( rProperty.Name == "SwitchEraserMode" )
+    {
+        bool bSwitchEraserMode(false);
+        if (rProperty.Value >>= bSwitchEraserMode)
+        {
+            OSL_ENSURE( mbMouseVisible,
+                        "setProperty(): User paint overrides invisible mouse" );
+            if(bSwitchEraserMode){
+                // switch to Eraser mode
+                maEventMultiplexer.notifySwitchEraserMode();
+            }
+        }
+
+        return true;
+    }
+
+    if ( rProperty.Name == "EraseInk" )
+    {
+        sal_Int32 nEraseInk(100);
+        if (rProperty.Value >>= nEraseInk)
+        {
+            OSL_ENSURE( mbMouseVisible,
+                        "setProperty(): User paint overrides invisible mouse" );
+
+            // enable user paint
+            maEraseInk = nEraseInk;
+            maEventMultiplexer.notifyEraseInkWidth( *maEraseInk );
+        }
+
+        return true;
+    }
+
+    // new Property for pen's width
+    if ( rProperty.Name == "UserPaintStrokeWidth" )
+    {
+        double nWidth(4.0);
+        if (rProperty.Value >>= nWidth)
+        {
+            OSL_ENSURE( mbMouseVisible,"setProperty(): User paint overrides invisible mouse" );
+            // enable user paint stroke width
+            maUserPaintStrokeWidth = nWidth;
+            maEventMultiplexer.notifyUserPaintStrokeWidth( maUserPaintStrokeWidth );
+        }
+
+        return true;
+    }
+
+    if ( rProperty.Name == "AdvanceOnClick" )
+    {
+        bool bAdvanceOnClick = false;
+        if (! (rProperty.Value >>= bAdvanceOnClick))
+            return false;
+        maUserEventQueue.setAdvanceOnClick( bAdvanceOnClick );
+        return true;
+    }
+
+    if ( rProperty.Name == "DisableAnimationZOrder" )
+    {
+        bool bDisableAnimationZOrder = false;
+        if (! (rProperty.Value >>= bDisableAnimationZOrder))
+            return false;
+        mbDisableAnimationZOrder = bDisableAnimationZOrder;
+        return true;
+    }
+
+    if ( rProperty.Name == "ImageAnimationsAllowed" )
+    {
+        if (! (rProperty.Value >>= mbImageAnimationsAllowed))
+            return false;
+
+        // TODO(F3): Forward to slides!
+        return true;
+    }
+
+    if ( rProperty.Name == "MouseVisible" )
+    {
+        if (! (rProperty.Value >>= mbMouseVisible))
+            return false;
+
+        requestCursor(mnCurrentCursor);
+
+        return true;
+    }
+
+    if ( rProperty.Name == "ForceManualAdvance" )
+    {
+        return (rProperty.Value >>= mbForceManualAdvance);
+    }
+
+    if ( rProperty.Name == "RehearseTimings" )
+    {
+        bool bRehearseTimings = false;
+        if (! (rProperty.Value >>= bRehearseTimings))
+            return false;
+
+        if (bRehearseTimings)
+        {
+            // TODO(Q3): Move to slide
+            mpRehearseTimingsActivity = RehearseTimingsActivity::create(
+                SlideShowContext(
+                    mpDummyPtr,
+                    maEventQueue,
+                    maEventMultiplexer,
+                    maScreenUpdater,
+                    maActivitiesQueue,
+                    maUserEventQueue,
+                    *this,
+                    *this,
+                    maViewContainer,
+                    mxComponentContext,
+                    mpBox2DDummyPtr ) );
+        }
+        else if (mpRehearseTimingsActivity)
+        {
+            // removes timer from all views:
+            mpRehearseTimingsActivity->dispose();
+            mpRehearseTimingsActivity.reset();
+        }
+        return true;
+    }
+
+    if ( rProperty.Name == "WaitSymbolBitmap" )
+    {
+        uno::Reference<rendering::XBitmap> xBitmap;
+        if (! (rProperty.Value >>= xBitmap))
+            return false;
+
+        mpWaitSymbol = WaitSymbol::create( xBitmap,
+                                           maScreenUpdater,
+                                           maEventMultiplexer,
+                                           maViewContainer );
+
+        return true;
+    }
+
+    if ( rProperty.Name == "PointerSymbolBitmap" )
+    {
+        uno::Reference<rendering::XBitmap> xBitmap;
+        if (! (rProperty.Value >>= xBitmap))
+            return false;
+
+        mpPointerSymbol = PointerSymbol::create( xBitmap,
+                                           maScreenUpdater,
+                                           maEventMultiplexer,
+                                           maViewContainer );
+
+        return true;
+    }
+
+    if ( rProperty.Name == "PointerVisible" )
+    {
+        bool visible;
+        if (!(rProperty.Value >>= visible))
+            return false;
+
+        mpPointerSymbol->setVisible(visible);
+        return true;
+    }
+
+    if ( rProperty.Name == "PointerPosition")
+    {
+        css::geometry::RealPoint2D pos;
+        if (! (rProperty.Value >>= pos))
+            return false;
+
+        mpPointerSymbol->viewsChanged(pos);
+        return true;
+    }
+
+    if (rProperty.Name == "NoSlideTransitions" )
+    {
+        return (rProperty.Value >>= mbNoSlideTransitions);
+    }
+
+    if ( rProperty.Name == "IsSoundEnabled" )
+    {
+        uno::Sequence<uno::Any> aValues;
+        uno::Reference<presentation::XSlideShowView> xView;
+        bool bValue (false);
+        if ((rProperty.Value >>= aValues)
+            && aValues.getLength()==2
+            && (aValues[0] >>= xView)
+            && (aValues[1] >>= bValue))
+        {
+            // Look up the view.
+            auto iView = std::find_if(maViewContainer.begin(), maViewContainer.end(),
+                [&xView](const UnoViewSharedPtr& rxView) { return rxView && rxView->getUnoView() == xView; });
+            if (iView != maViewContainer.end())
+            {
+                // Store the flag at the view so that media shapes have
+                // access to it.
+                (*iView)->setIsSoundEnabled(bValue);
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+void SlideShowImpl::addSlideShowListener(
+    uno::Reference<presentation::XSlideShowListener> const& xListener )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return;
+
+    // container syncs with passed mutex ref
+    maListenerContainer.addInterface(xListener);
+}
+
+void SlideShowImpl::removeSlideShowListener(
+    uno::Reference<presentation::XSlideShowListener> const& xListener )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    // container syncs with passed mutex ref
+    maListenerContainer.removeInterface(xListener);
+}
+
+void SlideShowImpl::addShapeEventListener(
+    uno::Reference<presentation::XShapeEventListener> const& xListener,
+    uno::Reference<drawing::XShape> const& xShape )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return;
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    ShapeEventListenerMap::iterator aIter;
+    if( (aIter=maShapeEventListeners.find( xShape )) ==
+        maShapeEventListeners.end() )
+    {
+        // no entry for this shape -> create one
+        aIter = maShapeEventListeners.emplace(
+                xShape,
+                std::make_shared<comphelper::OInterfaceContainerHelper3<css::presentation::XShapeEventListener>>(
+                    m_aMutex)).first;
+    }
+
+    // add new listener to broadcaster
+    if( aIter->second )
+        aIter->second->addInterface( xListener );
+
+    maEventMultiplexer.notifyShapeListenerAdded(xShape);
+}
+
+void SlideShowImpl::removeShapeEventListener(
+    uno::Reference<presentation::XShapeEventListener> const& xListener,
+    uno::Reference<drawing::XShape> const& xShape )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    ShapeEventListenerMap::iterator aIter;
+    if( (aIter = maShapeEventListeners.find( xShape )) !=
+        maShapeEventListeners.end() )
+    {
+        // entry for this shape found -> remove listener from
+        // helper object
+        ENSURE_OR_THROW(
+            aIter->second,
+            "SlideShowImpl::removeShapeEventListener(): "
+            "listener map contains NULL broadcast helper" );
+
+        aIter->second->removeInterface( xListener );
+    }
+
+    maEventMultiplexer.notifyShapeListenerRemoved(xShape);
+}
+
+void SlideShowImpl::setShapeCursor(
+    uno::Reference<drawing::XShape> const& xShape, sal_Int16 nPointerShape )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return;
+
+    // precondition: must only be called from the main thread!
+    DBG_TESTSOLARMUTEX();
+
+    ShapeCursorMap::iterator aIter;
+    if( (aIter=maShapeCursors.find( xShape )) == maShapeCursors.end() )
+    {
+        // no entry for this shape -> create one
+        if( nPointerShape != awt::SystemPointer::ARROW )
+        {
+            // add new entry, unless shape shall display
+            // normal pointer arrow -> no need to handle that
+            // case
+            maShapeCursors.emplace(xShape, nPointerShape);
+        }
+    }
+    else if( nPointerShape == awt::SystemPointer::ARROW )
+    {
+        // shape shall display normal cursor -> can disable
+        // the cursor and clear the entry
+        maShapeCursors.erase( xShape );
+    }
+    else
+    {
+        // existing entry found, update with new cursor ID
+        aIter->second = nPointerShape;
+    }
+}
+
+bool SlideShowImpl::requestCursor( sal_Int16 nCursorShape )
+{
+    mnCurrentCursor = nCursorShape;
+
+    const sal_Int16 nActualCursor = calcActiveCursor(mnCurrentCursor);
+
+    // change all views to the requested cursor ID
+    for( const auto& pView : maViewContainer )
+        pView->setCursorShape( nActualCursor );
+
+    return nActualCursor==nCursorShape;
+}
+
+void SlideShowImpl::resetCursor()
+{
+    mnCurrentCursor = awt::SystemPointer::ARROW;
+
+    const sal_Int16 nActualCursor = calcActiveCursor( mnCurrentCursor );
+    // change all views to the default cursor ID
+    for( const auto& pView : maViewContainer )
+        pView->setCursorShape( nActualCursor );
+}
+
+sal_Bool SlideShowImpl::update( double & nNextTimeout )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (isDisposed())
+        return false;
+
+    // precondition: update() must only be called from the
+    // main thread!
+    DBG_TESTSOLARMUTEX();
+
+    if( mbShowPaused )
+    {
+        // commit frame (might be repaints pending)
+        maScreenUpdater.commitUpdates();
+
+        return false;
+    }
+    else
+    {
+        // TODO(F2): re-evaluate whether that timer lagging makes
+        // sense.
+
+        // hold timer, while processing the queues:
+        // 1. when there is more than one active activity this ensures the
+        //    same time for all activities and events
+        // 2. processing of events may lead to creation of further events
+        //    that have zero delay.  While the timer is stopped these events
+        //    are processed in the same run.
+        {
+            //Get a shared-ptr that outlives the scope-guard which will
+            //ensure that the pointed-to-item exists in the case of a
+            //::dispose clearing mpPresTimer
+            std::shared_ptr<canvas::tools::ElapsedTime> xTimer(mpPresTimer);
+            comphelper::ScopeGuard scopeGuard(
+                [&xTimer]() { return xTimer->releaseTimer(); } );
+            xTimer->holdTimer();
+
+            // process queues
+            maEventQueue.process();
+
+            // #i118671# the call above may execute a macro bound to an object. In
+            // that case this macro may have destroyed this local slideshow so that it
+            // is disposed (see bugdoc at task). In that case, detect this and exit
+            // gently from this slideshow. Do not forget to disable the scoped
+            // call to mpPresTimer, this will be deleted if we are disposed.
+            if (isDisposed())
+            {
+                scopeGuard.dismiss();
+                return false;
+            }
+
+            maActivitiesQueue.process();
+
+            // commit frame to screen
+            maFrameSynchronization.Synchronize();
+            maScreenUpdater.commitUpdates();
+
+            // TODO(Q3): remove need to call dequeued() from
+            // activities. feels like a wart.
+
+            // Rationale for ActivitiesQueue::processDequeued(): when
+            // an activity ends, it usually pushed the end state to
+            // the animated shape in question, and ends the animation
+            // (which, in turn, will usually disable shape sprite
+            // mode). Disabling shape sprite mode causes shape
+            // repaint, which, depending on slide content, takes
+            // considerably more time than sprite updates. Thus, the
+            // last animation step tends to look delayed. To
+            // camouflage this, reaching end position and disabling
+            // sprite mode is split into two (normal Activity::end(),
+            // and Activity::dequeued()). Now, the reason to call
+            // commitUpdates() twice here is caused by the unrelated
+            // fact that during wait cursor display/hide, the screen
+            // is updated, and shows hidden sprites, but, in case of
+            // leaving the second commitUpdates() call out and punting
+            // that to the next round, no updated static slide
+            // content. In short, the last shape animation of a slide
+            // tends to blink at its end.
+
+            // process dequeued activities _after_ commit to screen
+            maActivitiesQueue.processDequeued();
+
+            // commit frame to screen
+            maScreenUpdater.commitUpdates();
+        }
+        // Time held until here
+
+        const bool bActivitiesLeft = ! maActivitiesQueue.isEmpty();
+        const bool bTimerEventsLeft = ! maEventQueue.isEmpty();
+        const bool bRet = (bActivitiesLeft || bTimerEventsLeft);
+
+        if (bRet)
+        {
+            // calc nNextTimeout value:
+            if (bActivitiesLeft)
+            {
+                // Activity queue is not empty.  Tell caller that we would
+                // like to render another frame.
+
+                // Return a zero time-out to signal our caller to call us
+                // back as soon as possible.  The actual timing, waiting the
+                // appropriate amount of time between frames, is then done
+                // by the maFrameSynchronization object.
+                nNextTimeout = 0;
+                maFrameSynchronization.Activate();
+            }
+            else
+            {
+                // timer events left:
+                // difference from current time (nota bene:
+                // time no longer held here!) to the next event in
+                // the event queue.
+
+                // #i61190# Retrieve next timeout only _after_
+                // processing activity queue
+
+                // ensure positive value:
+                nNextTimeout = std::max( 0.0, maEventQueue.nextTimeout() );
+
+                // There is no active animation so the frame rate does not
+                // need to be synchronized.
+                maFrameSynchronization.Deactivate();
+            }
+
+            mbSlideShowIdle = false;
+        }
+
+#if defined(DBG_UTIL)
+        // when slideshow is idle, issue an XUpdatable::update() call
+        // exactly once after a previous animation sequence finished -
+        // this might trigger screen dumps on some canvas
+        // implementations
+        if( !mbSlideShowIdle &&
+            (!bRet ||
+             nNextTimeout > 1.0) )
+        {
+            for( const auto& pView : maViewContainer )
+            {
+                try
+                {
+                    uno::Reference< presentation::XSlideShowView > xView( pView->getUnoView(),
+                                                                          uno::UNO_SET_THROW );
+                    uno::Reference<util::XUpdatable> const xUpdatable(
+                            xView->getCanvas(), uno::UNO_QUERY);
+                    if (xUpdatable.is()) // not supported in PresenterCanvas
+                    {
+                        xUpdatable->update();
+                    }
+                }
+                catch( uno::RuntimeException& )
+                {
+                    throw;
+                }
+                catch( uno::Exception& )
+                {
+                    TOOLS_WARN_EXCEPTION( "slideshow", "" );
+                }
+            }
+
+            mbSlideShowIdle = true;
+        }
+#endif
+
+        return bRet;
+    }
+}
+
+void SlideShowImpl::notifySlideTransitionEnded( bool bPaintSlide )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    OSL_ENSURE( !isDisposed(), "### already disposed!" );
+    OSL_ENSURE( mpCurrentSlide,
+                "notifySlideTransitionEnded(): Invalid current slide" );
+    if (mpCurrentSlide)
+    {
+        mpCurrentSlide->update_settings( !!maUserPaintColor, maUserPaintColor ? *maUserPaintColor : RGBColor(), maUserPaintStrokeWidth );
+
+        // first init show, to give the animations
+        // the chance to register SlideStartEvents
+        const bool bBackgroundLayerRendered( !bPaintSlide );
+        mpCurrentSlide->show( bBackgroundLayerRendered );
+        maEventMultiplexer.notifySlideStartEvent();
+    }
+}
+
+void queryAutomaticSlideTransition( uno::Reference<drawing::XDrawPage> const& xDrawPage,
+                                    double&                                   nAutomaticNextSlideTimeout,
+                                    bool&                                     bHasAutomaticNextSlide )
+{
+    // retrieve slide change parameters from XDrawPage
+    // ===============================================
+
+    uno::Reference< beans::XPropertySet > xPropSet( xDrawPage,
+                                                    uno::UNO_QUERY );
+
+    sal_Int32 nChange(0);
+    if( !xPropSet.is() ||
+        !getPropertyValue( nChange,
+                           xPropSet,
+                           "Change") )
+    {
+        SAL_INFO("slideshow",
+            "queryAutomaticSlideTransition(): "
+            "Could not extract slide change mode from XDrawPage - assuming <none>" );
+    }
+
+    bHasAutomaticNextSlide = nChange == 1;
+
+    if( !xPropSet.is() ||
+        !getPropertyValue( nAutomaticNextSlideTimeout,
+                           xPropSet,
+                           "HighResDuration") )
+    {
+        SAL_INFO("slideshow",
+            "queryAutomaticSlideTransition(): "
+            "Could not extract slide transition timeout from "
+            "XDrawPage - assuming 1 sec" );
+    }
+}
+
+void SlideShowImpl::notifySlideAnimationsEnded()
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    //Draw polygons above animations
+    mpCurrentSlide->drawPolygons();
+
+    OSL_ENSURE( !isDisposed(), "### already disposed!" );
+
+    // This struct will receive the (interruptable) event,
+    // that triggers the notifySlideEnded() method.
+    InterruptableEventPair aNotificationEvents;
+
+    if( maEventMultiplexer.getAutomaticMode() )
+    {
+        OSL_ENSURE( ! mpRehearseTimingsActivity,
+                    "unexpected: RehearseTimings mode!" );
+
+        // schedule a slide end event, with automatic mode's
+        // delay
+        aNotificationEvents = makeInterruptableDelay(
+            [this]() { return this->notifySlideEnded( false ); },
+            maEventMultiplexer.getAutomaticTimeout() );
+    }
+    else
+    {
+        OSL_ENSURE( mpCurrentSlide,
+                    "notifySlideAnimationsEnded(): Invalid current slide!" );
+
+        bool   bHasAutomaticNextSlide=false;
+        double nAutomaticNextSlideTimeout=0.0;
+        queryAutomaticSlideTransition(mpCurrentSlide->getXDrawPage(),
+                                      nAutomaticNextSlideTimeout,
+                                      bHasAutomaticNextSlide);
+
+        // check whether slide transition should happen
+        // 'automatically'. If yes, simply schedule the
+        // specified timeout.
+        // NOTE: mbForceManualAdvance and mpRehearseTimingsActivity
+        // override any individual slide setting, to always
+        // step slides manually.
+        if( !mbForceManualAdvance &&
+            !mpRehearseTimingsActivity &&
+            bHasAutomaticNextSlide )
+        {
+            aNotificationEvents = makeInterruptableDelay(
+                [this]() { return this->notifySlideEnded( false ); },
+                nAutomaticNextSlideTimeout);
+
+            // TODO(F2): Provide a mechanism to let the user override
+            // this automatic timeout via next()
+        }
+        else
+        {
+            if (mpRehearseTimingsActivity)
+                mpRehearseTimingsActivity->start();
+
+            // generate click event. Thus, the user must
+            // trigger the actual end of a slide. No need to
+            // generate interruptable event here, there's no
+            // timeout involved.
+            aNotificationEvents.mpImmediateEvent =
+                makeEvent( [this] () { this->notifySlideEnded(false); },
+                    "SlideShowImpl::notifySlideEnded");
+        }
+    }
+
+    // register events on the queues. To make automatic slide
+    // changes interruptable, register the interruption event
+    // as a nextEffectEvent target. Note that the timeout
+    // event is optional (e.g. manual slide changes don't
+    // generate a timeout)
+    maUserEventQueue.registerNextEffectEvent(
+        aNotificationEvents.mpImmediateEvent );
+
+    if( aNotificationEvents.mpTimeoutEvent )
+        maEventQueue.addEvent( aNotificationEvents.mpTimeoutEvent );
+
+    // current slide's main sequence is over. Now should be
+    // the time to prefetch the next slide (if any), and
+    // prepare the initial slide bitmap (speeds up slide
+    // change setup time a lot). Show the wait cursor, this
+    // indeed might take some seconds.
+    {
+        WaitSymbolLock aLock (*this);
+
+        if (! matches( mpPrefetchSlide,
+                       mxPrefetchSlide, mxPrefetchAnimationNode ))
+        {
+            mpPrefetchSlide = makeSlide( mxPrefetchSlide, mxDrawPagesSupplier,
+                                         mxPrefetchAnimationNode );
+        }
+        if (mpPrefetchSlide)
+        {
+            // ignore return value, this is just to populate
+            // Slide's internal bitmap buffer, such that the time
+            // needed to generate the slide bitmap is not spent
+            // when the slide change is requested.
+            mpPrefetchSlide->getCurrentSlideBitmap( *maViewContainer.begin() );
+        }
+    } // finally
+
+    maListenerContainer.forEach(
+        [](uno::Reference<presentation::XSlideShowListener> const& xListener)
+        {
+            xListener->slideAnimationsEnded();
+        });
+}
+
+void SlideShowImpl::notifySlideEnded (const bool bReverse)
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    OSL_ENSURE( !isDisposed(), "### already disposed!" );
+
+    if (mpRehearseTimingsActivity && !bReverse)
+    {
+        const double time = mpRehearseTimingsActivity->stop();
+        if (mpRehearseTimingsActivity->hasBeenClicked())
+        {
+            // save time at current drawpage:
+            uno::Reference<beans::XPropertySet> xPropSet(
+                mpCurrentSlide->getXDrawPage(), uno::UNO_QUERY );
+            OSL_ASSERT( xPropSet.is() );
+            if (xPropSet.is())
+            {
+                xPropSet->setPropertyValue(
+                    "Change",
+                    uno::Any( static_cast<sal_Int32>(1) ) );
+                xPropSet->setPropertyValue(
+                    "Duration",
+                    uno::Any( static_cast<sal_Int32>(time) ) );
+            }
+        }
+    }
+
+    if (bReverse)
+        maEventMultiplexer.notifySlideEndEvent();
+
+    stopShow();  // MUST call that: results in
+                 // maUserEventQueue.clear(). What's more,
+                 // stopShow()'s currSlide->hide() call is
+                 // now also required, notifySlideEnded()
+                 // relies on that
+                 // unconditionally. Otherwise, genuine
+                 // shape animations (drawing layer and
+                 // GIF) will not be stopped.
+
+    maListenerContainer.forEach(
+        [&bReverse]( const uno::Reference< presentation::XSlideShowListener >& xListener )
+        { return xListener->slideEnded( bReverse ); } );
+}
+
+bool SlideShowImpl::notifyHyperLinkClicked( OUString const& hyperLink )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    maListenerContainer.forEach(
+        [&hyperLink]( const uno::Reference< presentation::XSlideShowListener >& xListener )
+        { return xListener->hyperLinkClicked( hyperLink ); } );
+    return true;
+}
+
+/** Notification from eventmultiplexer that an animation event has occurred.
+    This will be forwarded to all registered XSlideShoeListener
+ */
+bool SlideShowImpl::handleAnimationEvent( const AnimationNodeSharedPtr& rNode )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    uno::Reference<animations::XAnimationNode> xNode( rNode->getXAnimationNode() );
+
+    switch( rNode->getState() )
+    {
+    case AnimationNode::ACTIVE:
+        maListenerContainer.forEach(
+            [&xNode]( const uno::Reference< animations::XAnimationListener >& xListener )
+            { return xListener->beginEvent( xNode ); } );
+        break;
+
+    case AnimationNode::FROZEN:
+    case AnimationNode::ENDED:
+        maListenerContainer.forEach(
+            [&xNode]( const uno::Reference< animations::XAnimationListener >& xListener )
+            { return xListener->endEvent( xNode ); } );
+        if(mpCurrentSlide->isPaintOverlayActive())
+           mpCurrentSlide->drawPolygons();
+        break;
+    default:
+        break;
+    }
+
+    return true;
+}
+
+std::shared_ptr<avmedia::MediaTempFile> SlideShowImpl::getMediaTempFile(const OUString& aUrl)
+{
+    std::shared_ptr<avmedia::MediaTempFile> aRet;
+
+#if !HAVE_FEATURE_AVMEDIA
+    (void)aUrl;
+#else
+    if (!mxSBD.is())
+        return aRet;
+
+    comphelper::LifecycleProxy aProxy;
+    uno::Reference<io::XStream> xStream =
+        comphelper::OStorageHelper::GetStreamAtPackageURL(mxSBD->getDocumentStorage(), aUrl,
+                css::embed::ElementModes::READ, aProxy);
+
+    uno::Reference<io::XInputStream> xInStream = xStream->getInputStream();
+    if (xInStream.is())
+    {
+        sal_Int32 nLastDot = aUrl.lastIndexOf('.');
+        sal_Int32 nLastSlash = aUrl.lastIndexOf('/');
+        OUString sDesiredExtension;
+        if (nLastDot > nLastSlash && nLastDot+1 < aUrl.getLength())
+            sDesiredExtension = aUrl.copy(nLastDot);
+
+        OUString sTempUrl;
+        if (::avmedia::CreateMediaTempFile(xInStream, sTempUrl, sDesiredExtension))
+            aRet = std::make_shared<avmedia::MediaTempFile>(sTempUrl);
+
+        xInStream->closeInput();
+    }
+#endif
+
+    return aRet;
+}
+
+//===== FrameSynchronization ==================================================
+
+FrameSynchronization::FrameSynchronization (const double nFrameDuration)
+    : maTimer(),
+      mnFrameDuration(nFrameDuration),
+      mnNextFrameTargetTime(0),
+      mbIsActive(false)
+{
+    MarkCurrentFrame();
+}
+
+void FrameSynchronization::MarkCurrentFrame()
+{
+    mnNextFrameTargetTime = maTimer.getElapsedTime() + mnFrameDuration;
+}
+
+void FrameSynchronization::Synchronize()
+{
+    if (mbIsActive)
+    {
+        // Do busy waiting for now.
+        for(;;)
+        {
+            double remainingTime = mnNextFrameTargetTime - maTimer.getElapsedTime();
+            if(remainingTime <= 0)
+                break;
+            // Try to sleep most of it.
+            int remainingMilliseconds = remainingTime * 1000;
+            if(remainingMilliseconds > 2)
+                osl::Thread::wait(std::chrono::milliseconds(remainingMilliseconds - 2));
+        }
+    }
+
+    MarkCurrentFrame();
+}
+
+void FrameSynchronization::Activate()
+{
+    mbIsActive = true;
+}
+
+void FrameSynchronization::Deactivate()
+{
+    mbIsActive = false;
+}
+
+} // anon namespace
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+slideshow_SlideShowImpl_get_implementation(
+    css::uno::XComponentContext* context , css::uno::Sequence<css::uno::Any> const&)
+{
+    return cppu::acquire(new SlideShowImpl(context));
+}
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/engine/slideview.cxx b/slideshow/source/engine/slideview.cxx
new file mode 100644
index 000000000..013e089a0
--- /dev/null
+++ b/slideshow/source/engine/slideview.cxx
@@ -0,0 +1,1193 @@
+/* -*- 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/diagnose_ex.h>
+#include <canvas/canvastools.hxx>
+
+#include <eventqueue.hxx>
+#include <eventmultiplexer.hxx>
+#include <slideview.hxx>
+#include <delayevent.hxx>
+#include <unoview.hxx>
+
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <comphelper/make_shared_from_uno.hxx>
+
+#include <cppcanvas/spritecanvas.hxx>
+#include <cppcanvas/customsprite.hxx>
+#include <cppcanvas/vclfactory.hxx>
+#include <cppcanvas/basegfxfactory.hxx>
+
+#include <basegfx/range/b1drange.hxx>
+#include <basegfx/range/b2drange.hxx>
+#include <basegfx/range/b2irange.hxx>
+#include <basegfx/point/b2dpoint.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <basegfx/polygon/b2dpolypolygontools.hxx>
+#include <basegfx/utils/canvastools.hxx>
+#include <basegfx/polygon/b2dpolygonclipper.hxx>
+#include <basegfx/polygon/b2dpolypolygoncutter.hxx>
+
+#include <com/sun/star/awt/XPaintListener.hpp>
+#include <com/sun/star/presentation/XSlideShowView.hpp>
+#include <com/sun/star/rendering/CompositeOperation.hpp>
+#include <com/sun/star/util/XModifyListener.hpp>
+
+#include <memory>
+#include <vector>
+#include <algorithm>
+
+using namespace com::sun::star;
+
+namespace slideshow::internal {
+
+namespace {
+
+/** Sprite entry, to store sprite plus priority
+
+    The operator<() defines a strict weak ordering of sprites, sort
+    key is the sprite priority.
+ */
+struct SpriteEntry
+{
+    SpriteEntry( const cppcanvas::CustomSpriteSharedPtr& rSprite,
+                 double                                  nPrio ) :
+        mpSprite( rSprite ),
+        mnPriority( nPrio )
+    {
+    }
+
+    bool operator<(const SpriteEntry& rRHS) const
+    {
+        return mnPriority < rRHS.mnPriority;
+    }
+
+    std::weak_ptr< cppcanvas::CustomSprite > mpSprite;
+    double                                     mnPriority;
+};
+
+typedef std::vector< SpriteEntry > SpriteVector;
+
+
+/** Create a clip polygon for slide views
+
+    @param rClip
+    Clip to set (can be empty)
+
+    @param rCanvas
+    Canvas to create the clip polygon for
+
+    @param rUserSize
+    The size of the view. Note that the returned clip will
+    <em>always</em> clip to at least the rect defined herein.
+
+    @return the view clip polygon, in view coordinates, which is
+    guaranteed to at least clip to the view size.
+ */
+basegfx::B2DPolyPolygon createClipPolygon( const basegfx::B2DPolyPolygon&    rClip,
+                                           const cppcanvas::CanvasSharedPtr& /*rCanvas*/,
+                                           const basegfx::B2DSize&           rUserSize )
+{
+    // setup canvas clipping
+    // =====================
+
+    // AW: Simplified
+    const basegfx::B2DRange aClipRange(0, 0, rUserSize.getX(), rUserSize.getY());
+
+    if(rClip.count())
+    {
+        return basegfx::utils::clipPolyPolygonOnRange(rClip, aClipRange, true, false);
+    }
+    else
+    {
+        return basegfx::B2DPolyPolygon(basegfx::utils::createPolygonFromRect(aClipRange));
+    }
+}
+
+/** Prepare given clip polygon to be stored as the current clip
+
+    Note that this is separate from createClipPolygon(), to allow
+    SlideView implementations to store this intermediate result
+    (createClipPolygon() has to be called every time the view size
+    changes)
+ */
+basegfx::B2DPolyPolygon prepareClip( const basegfx::B2DPolyPolygon& rClip )
+{
+    basegfx::B2DPolyPolygon aClip( rClip );
+
+    // normalize polygon, preparation for clipping
+    // in updateCanvas()
+    aClip = basegfx::utils::correctOrientations(aClip);
+    aClip = basegfx::utils::solveCrossovers(aClip);
+    aClip = basegfx::utils::stripNeutralPolygons(aClip);
+    aClip = basegfx::utils::stripDispensablePolygons(aClip);
+
+    return aClip;
+}
+
+
+void clearRect( ::cppcanvas::CanvasSharedPtr const& pCanvas,
+                basegfx::B2IRange const&            rArea )
+{
+    // convert clip polygon to device coordinate system
+    ::basegfx::B2DPolyPolygon const* pClipPoly( pCanvas->getClip() );
+    if( pClipPoly )
+    {
+        ::basegfx::B2DPolyPolygon aClipPoly( *pClipPoly );
+        aClipPoly.transform( pCanvas->getTransformation() );
+        pCanvas->setClip( aClipPoly );
+    }
+
+    // set transformation to identity (->device pixel)
+    pCanvas->setTransformation( ::basegfx::B2DHomMatrix() );
+
+    // #i42440# Fill the _full_ background in
+    // black. Since we had to extend the bitmap by one
+    // pixel, and the bitmap is initialized white,
+    // depending on the slide content a one pixel wide
+    // line will show to the bottom and the right.
+    const ::basegfx::B2DPolygon aPoly(
+        ::basegfx::utils::createPolygonFromRect(
+            basegfx::B2DRange(rArea)));
+
+    ::cppcanvas::PolyPolygonSharedPtr pPolyPoly(
+        ::cppcanvas::BaseGfxFactory::createPolyPolygon( pCanvas, aPoly ) );
+
+    if( pPolyPoly )
+    {
+        pPolyPoly->setCompositeOp( css::rendering::CompositeOperation::SOURCE );
+        pPolyPoly->setRGBAFillColor( 0xFFFFFF00U );
+        pPolyPoly->draw();
+    }
+
+#if defined(DBG_UTIL)
+    ::cppcanvas::CanvasSharedPtr pCliplessCanvas( pCanvas->clone() );
+    pCliplessCanvas->setClip();
+
+    if( pCanvas->getClip() )
+    {
+        ::cppcanvas::PolyPolygonSharedPtr pPolyPoly2(
+            ::cppcanvas::BaseGfxFactory::createPolyPolygon( pCliplessCanvas, aPoly ));
+        if( pPolyPoly2 )
+        {
+            pPolyPoly2->setRGBALineColor( 0x008000FFU );
+            pPolyPoly2->draw();
+        }
+    }
+#endif
+}
+
+/** Get bounds in pixel
+
+    @param rLayerBounds
+    Bound rect, in user space coordinates
+
+    @param rTransformation
+    User space to device pixel transformation
+
+    @return the layer bounds in pixel, extended by one pixel to the
+    right and bottom
+ */
+basegfx::B2IRange getLayerBoundsPixel( basegfx::B2DRange const&     rLayerBounds,
+                                       basegfx::B2DHomMatrix const& rTransformation )
+{
+    ::basegfx::B2DRange aTmpRect;
+    ::canvas::tools::calcTransformedRectBounds( aTmpRect,
+                                                rLayerBounds,
+                                                rTransformation );
+
+    if( aTmpRect.isEmpty() )
+        return ::basegfx::B2IRange();
+
+    // #i42440# Returned layer size is one pixel too small, as
+    // rendering happens one pixel to the right and below the
+    // actual bound rect.
+    return ::basegfx::B2IRange( ::basegfx::fround(aTmpRect.getMinX()),
+                                ::basegfx::fround(aTmpRect.getMinY()),
+                                ::basegfx::fround(aTmpRect.getMaxX()) + 1,
+                                ::basegfx::fround(aTmpRect.getMaxY()) + 1 );
+}
+
+
+/** Container class for sprites issued by a ViewLayer
+
+    This class handles the sprite prioritization issues, that are
+    needed for layer sprites (e.g. the need to re-prioritize sprites
+    when the layer changes prio).
+ */
+class LayerSpriteContainer
+{
+    /** Max fill level of maSprites, before we try to prune it from
+        deceased sprites
+    */
+    enum{ SPRITE_ULLAGE=256 };
+
+    /** All sprites that have been issued by this container (pruned
+        from time to time, for invalid references). This vector is
+        kept sorted with increasing sprite priority.
+    */
+    SpriteVector       maSprites;
+
+    /// Priority of this layer, relative to other view layers
+    basegfx::B1DRange  maLayerPrioRange;
+
+    double getSpritePriority( std::size_t nSpriteNum ) const
+    {
+        // divide the available layer range equally between all
+        // sprites, assign upper bound of individual sprite range as
+        // sprite prio (the layer itself gets assigned the lower bound
+        // of sprite 0's individual range):
+
+        // | layer 0                    | layer 1                    | ...
+        // |    sprite 0 |    sprite 1  |    sprite 0 |    sprite 1  | ...
+        return maLayerPrioRange.getMinimum() + maLayerPrioRange.getRange()*(nSpriteNum+1)/(maSprites.size()+1);
+    }
+
+    /** Rescan sprite vector, and remove deceased sprites (and reset
+        sprite prio)
+
+        @param aBegin
+        Iterator to the first entry to rescan
+     */
+    void updateSprites()
+    {
+        SpriteVector aValidSprites;
+
+        // check all sprites for validity and set new priority
+        for( const auto& rSprite : maSprites )
+        {
+            cppcanvas::CustomSpriteSharedPtr pCurrSprite( rSprite.mpSprite.lock() );
+
+            if( pCurrSprite )
+            {
+                // only copy still valid sprites over to the refreshed
+                // sprite vector.
+                aValidSprites.push_back( rSprite );
+
+                pCurrSprite->setPriority(
+                    getSpritePriority( aValidSprites.size()-1 ));
+            }
+        }
+
+        // replace sprite list with pruned one
+        maSprites.swap( aValidSprites );
+    }
+
+public:
+    LayerSpriteContainer() :
+        maSprites(),
+        maLayerPrioRange()
+    {
+    }
+
+    const basegfx::B1DRange& getLayerPriority() const
+    {
+        return maLayerPrioRange;
+    }
+
+    void setLayerPriority( const basegfx::B1DRange& rRange )
+    {
+        if( rRange != maLayerPrioRange )
+        {
+            maLayerPrioRange = rRange;
+
+            // prune and recalc sprite prios
+            updateSprites();
+        }
+    }
+
+    void addSprite( const cppcanvas::CustomSpriteSharedPtr& pSprite,
+                    double                                  nPriority )
+    {
+        if( !pSprite )
+            return;
+
+        SpriteEntry aEntry( pSprite,nPriority );
+
+        // insert new sprite, such that vector stays sorted
+        SpriteVector::iterator aInsertPos(
+            maSprites.insert(
+                std::lower_bound( maSprites.begin(),
+                                  maSprites.end(),
+                                  aEntry ),
+                aEntry ));
+
+        const std::size_t nNumSprites( maSprites.size() );
+        if( nNumSprites > SPRITE_ULLAGE ||
+            maSprites.end() - aInsertPos > 1 )
+        {
+            // updateSprites() also updates all sprite prios
+            updateSprites();
+        }
+        else
+        {
+            // added sprite to the end, and not too many sprites in
+            // vector - perform optimized update (only need to set
+            // prio). This basically caters for the common case of
+            // iterated character animations, which generate lots of
+            // sprites, all added to the end.
+            pSprite->setPriority(
+                getSpritePriority( nNumSprites-1 ));
+        }
+    }
+
+    void clear()
+    {
+        maSprites.clear();
+    }
+};
+
+
+/** This class provides layers for a slide view
+
+    Layers are used to render animations with the correct z order -
+    because sprites are always in front of the static canvas
+    background, shapes that must appear <em<before</em> an animation
+    must also be displayed as a sprite.
+
+    Each layer has a priority assigned to it (valid range [0,1]), which
+    also affects all sprites created for this specific layer - i.e. if
+    the layer priority changes, the sprites change z order together
+    with their parent.
+ */
+class SlideViewLayer : public ViewLayer
+{
+    /// Smart container for all sprites issued by this layer
+    mutable LayerSpriteContainer             maSpriteContainer;
+
+    /// Bounds of this layer in user space coordinates
+    basegfx::B2DRange                        maLayerBounds;
+
+    /// Bounds of this layer in device pixel
+    mutable basegfx::B2IRange                maLayerBoundsPixel;
+
+    /// Current clip polygon in user coordinates
+    basegfx::B2DPolyPolygon                  maClip;
+
+    /// Current size of the view in user coordinates
+    basegfx::B2DSize                         maUserSize;
+
+    /// Current overall view transformation
+    basegfx::B2DHomMatrix                    maTransformation;
+
+    /// 'parent' canvas, this viewlayer is associated with
+    const cppcanvas::SpriteCanvasSharedPtr   mpSpriteCanvas;
+
+    /** output surface (necessarily a sprite, won't otherwise be able
+        to display anything <em>before</em> other sprites)
+    */
+    mutable cppcanvas::CustomSpriteSharedPtr mpSprite;
+
+    /// actual output canvas retrieved from a sprite
+    mutable cppcanvas::CanvasSharedPtr       mpOutputCanvas;
+
+    /// ptr back to owning view. needed for isOnView() method
+    View const* const                        mpParentView;
+
+public:
+    /** Create a new layer
+
+        @param pCanvas
+        Sprite canvas to create the layer on
+
+        @param rTransform
+        Initial overall canvas transformation
+
+        @param rLayerBounds
+        Initial layer bounds, in view coordinate system
+     */
+    SlideViewLayer( const cppcanvas::SpriteCanvasSharedPtr& pCanvas,
+                    const basegfx::B2DHomMatrix&            rTransform,
+                    const basegfx::B2DRange&                rLayerBounds,
+                    const basegfx::B2DSize&                 rUserSize,
+                    View const* const                       pParentView) :
+        maSpriteContainer(),
+        maLayerBounds(rLayerBounds),
+        maLayerBoundsPixel(),
+        maClip(),
+        maUserSize(rUserSize),
+        maTransformation(rTransform),
+        mpSpriteCanvas(pCanvas),
+        mpSprite(),
+        mpOutputCanvas(),
+        mpParentView(pParentView)
+    {
+    }
+
+    SlideViewLayer(const SlideViewLayer&) = delete;
+    SlideViewLayer& operator=(const SlideViewLayer&) = delete;
+
+    void updateView( const basegfx::B2DHomMatrix& rMatrix,
+                     const basegfx::B2DSize&      rUserSize )
+    {
+        maTransformation = rMatrix;
+        maUserSize = rUserSize;
+
+        // limit layer bounds to visible screen
+        maLayerBounds.intersect( basegfx::B2DRange(0.0,
+                                                   0.0,
+                                                   maUserSize.getX(),
+                                                   maUserSize.getY()) );
+
+        basegfx::B2IRange const& rNewLayerPixel(
+            getLayerBoundsPixel(maLayerBounds,
+                                maTransformation) );
+        if( rNewLayerPixel != maLayerBoundsPixel )
+        {
+            // re-gen sprite with new size
+            mpOutputCanvas.reset();
+            mpSprite.reset();
+        }
+    }
+
+    virtual css::geometry::IntegerSize2D getTranslationOffset() const override
+    {
+        basegfx::B2DRectangle aTmpRect;
+        canvas::tools::calcTransformedRectBounds( aTmpRect,
+                                                  maLayerBounds,
+                                                  maTransformation );
+        geometry::IntegerSize2D offset(0, 0);
+
+        // Add translation according to the origin of aTmpRect.  Ignore the
+        // translation when aTmpRect was not properly initialized.
+        if ( ! aTmpRect.isEmpty())
+        {
+            offset.Width  = basegfx::fround(aTmpRect.getMinX());
+            offset.Height = basegfx::fround(aTmpRect.getMinY());
+        }
+        return offset;
+    }
+
+private:
+    // ViewLayer interface
+
+
+    virtual cppcanvas::CustomSpriteSharedPtr createSprite(
+        const ::basegfx::B2DSize& rSpriteSizePixel,
+        double                    nPriority ) const override
+    {
+        cppcanvas::CustomSpriteSharedPtr pSprite(
+            mpSpriteCanvas->createCustomSprite( rSpriteSizePixel ) );
+
+        maSpriteContainer.addSprite( pSprite,
+                                     nPriority );
+
+        return pSprite;
+    }
+
+    virtual void setPriority( const basegfx::B1DRange& rRange ) override
+    {
+        OSL_ENSURE( !rRange.isEmpty() &&
+                    rRange.getMinimum() >= 1.0,
+                    "SlideViewLayer::setPriority(): prio MUST be larger than 1.0 (because "
+                    "the background layer already lies there)" );
+
+        maSpriteContainer.setLayerPriority( rRange );
+
+        if( mpSprite )
+            mpSprite->setPriority( rRange.getMinimum() );
+    }
+
+    virtual basegfx::B2DHomMatrix getTransformation() const override
+    {
+        // Offset given transformation by left, top border of given
+        // range (after transformation through given transformation)
+        basegfx::B2DRectangle aTmpRect;
+        canvas::tools::calcTransformedRectBounds( aTmpRect,
+                                                  maLayerBounds,
+                                                  maTransformation );
+
+        basegfx::B2DHomMatrix aMatrix( maTransformation );
+
+        // Add translation according to the origin of aTmpRect.  Ignore the
+        // translation when aTmpRect was not properly initialized.
+        if ( ! aTmpRect.isEmpty())
+        {
+            aMatrix.translate( -basegfx::fround(aTmpRect.getMinX()),
+                               -basegfx::fround(aTmpRect.getMinY()) );
+        }
+
+        return aMatrix;
+    }
+
+    virtual basegfx::B2DHomMatrix getSpriteTransformation() const override
+    {
+        return maTransformation;
+    }
+
+    virtual void clear() const override
+    {
+        // grab canvas - that also lazy-initializes maLayerBoundsPixel
+        cppcanvas::CanvasSharedPtr pCanvas=getCanvas()->clone();
+
+        // clear whole canvas
+        const basegfx::B2I64Tuple& rSpriteSize(maLayerBoundsPixel.getRange());
+        clearRect(pCanvas,
+                  basegfx::B2IRange(0,0,rSpriteSize.getX(),rSpriteSize.getY()));
+    }
+
+    virtual void clearAll() const override
+    {
+        // grab canvas - that also lazy-initializes maLayerBoundsPixel
+        ::cppcanvas::CanvasSharedPtr pCanvas( getCanvas()->clone() );
+
+        // clear layer clip, to clear whole area
+        pCanvas->setClip();
+
+        // clear whole canvas
+        const basegfx::B2I64Tuple& rSpriteSize(maLayerBoundsPixel.getRange());
+        clearRect(pCanvas,
+                  basegfx::B2IRange(0,0,rSpriteSize.getX(),rSpriteSize.getY()));
+    }
+
+    virtual bool isOnView(ViewSharedPtr const& rView) const override
+    {
+        return rView.get() == mpParentView;
+    }
+
+    virtual cppcanvas::CanvasSharedPtr getCanvas() const override
+    {
+        if( !mpOutputCanvas )
+        {
+            if( !mpSprite )
+            {
+                maLayerBoundsPixel = getLayerBoundsPixel(maLayerBounds,
+                                                         maTransformation);
+
+                // HACK: ensure at least 1x1 pixel size. clients might
+                // need an actual canvas (e.g. for bound rect
+                // calculations) without rendering anything. Better
+                // solution: introduce something like a reference
+                // canvas for ViewLayers, which is always available.
+                if( maLayerBoundsPixel.isEmpty() )
+                    maLayerBoundsPixel = basegfx::B2IRange(0,0,1,1);
+
+                const basegfx::B2I64Tuple& rSpriteSize(maLayerBoundsPixel.getRange());
+                mpSprite = mpSpriteCanvas->createCustomSprite(
+                    basegfx::B2DVector(sal::static_int_cast<sal_Int32>(rSpriteSize.getX()),
+                                       sal::static_int_cast<sal_Int32>(rSpriteSize.getY())) );
+
+                mpSprite->setPriority(
+                    maSpriteContainer.getLayerPriority().getMinimum() );
+
+#if defined(DBG_UTIL)
+                mpSprite->movePixel(
+                    basegfx::B2DPoint(maLayerBoundsPixel.getMinimum()) +
+                    basegfx::B2DPoint(10,10) );
+
+                mpSprite->setAlpha(0.5);
+#else
+                mpSprite->movePixel(
+                    basegfx::B2DPoint(maLayerBoundsPixel.getMinimum()) );
+
+                mpSprite->setAlpha(1.0);
+#endif
+                mpSprite->show();
+            }
+
+            ENSURE_OR_THROW( mpSprite,
+                              "SlideViewLayer::getCanvas(): no layer sprite" );
+
+            mpOutputCanvas = mpSprite->getContentCanvas();
+
+            ENSURE_OR_THROW( mpOutputCanvas,
+                              "SlideViewLayer::getCanvas(): sprite doesn't yield a canvas" );
+
+            // new canvas retrieved - setup transformation and clip
+            mpOutputCanvas->setTransformation( getTransformation() );
+            mpOutputCanvas->setClip(
+                createClipPolygon( maClip,
+                                   mpOutputCanvas,
+                                   maUserSize ));
+        }
+
+        return mpOutputCanvas;
+    }
+
+    virtual void setClip( const basegfx::B2DPolyPolygon& rClip ) override
+    {
+        basegfx::B2DPolyPolygon aNewClip = prepareClip( rClip );
+
+        if( aNewClip != maClip )
+        {
+            maClip = aNewClip;
+
+            if(mpOutputCanvas )
+                mpOutputCanvas->setClip(
+                    createClipPolygon( maClip,
+                                       mpOutputCanvas,
+                                       maUserSize ));
+        }
+    }
+
+    virtual bool resize( const ::basegfx::B2DRange& rArea ) override
+    {
+        const bool bRet( maLayerBounds != rArea );
+        maLayerBounds = rArea;
+        updateView( maTransformation,
+                    maUserSize );
+
+        return bRet;
+    }
+};
+
+
+typedef cppu::WeakComponentImplHelper<
+      css::util::XModifyListener,
+      css::awt::XPaintListener> SlideViewBase;
+
+/** SlideView class
+
+    This class implements the View interface, encapsulating
+    <em>one</em> view a slideshow is displayed on.
+ */
+class SlideView : private cppu::BaseMutex,
+                  public SlideViewBase,
+                  public UnoView
+{
+public:
+    SlideView( const uno::Reference<presentation::XSlideShowView>& xView,
+               EventQueue&                                         rEventQueue,
+               EventMultiplexer&                                   rEventMultiplexer );
+    void updateCanvas();
+
+private:
+    // View:
+    virtual ViewLayerSharedPtr createViewLayer( const basegfx::B2DRange& rLayerBounds ) const override;
+    virtual bool updateScreen() const override;
+    virtual bool paintScreen() const override;
+    virtual void setViewSize( const ::basegfx::B2DSize& ) override;
+    virtual void setCursorShape( sal_Int16 nPointerShape ) override;
+
+    // ViewLayer interface
+    virtual bool isOnView(ViewSharedPtr const& rView) const override;
+    virtual void clear() const override;
+    virtual void clearAll() const override;
+    virtual cppcanvas::CanvasSharedPtr getCanvas() const override;
+    virtual cppcanvas::CustomSpriteSharedPtr createSprite( const ::basegfx::B2DSize& rSpriteSizePixel,
+                                                           double                    nPriority ) const override;
+    virtual void setPriority( const basegfx::B1DRange& rRange ) override;
+    virtual geometry::IntegerSize2D getTranslationOffset() const override;
+    virtual ::basegfx::B2DHomMatrix getTransformation() const override;
+    virtual basegfx::B2DHomMatrix getSpriteTransformation() const override;
+    virtual void setClip( const ::basegfx::B2DPolyPolygon& rClip ) override;
+    virtual bool resize( const ::basegfx::B2DRange& rArea ) override;
+
+    // UnoView:
+    virtual void _dispose() override;
+    virtual uno::Reference<presentation::XSlideShowView> getUnoView()const override;
+    virtual void setIsSoundEnabled (const bool bValue) override;
+    virtual bool isSoundEnabled() const override;
+
+    // XEventListener:
+    virtual void SAL_CALL disposing( lang::EventObject const& evt ) override;
+    // XModifyListener:
+    virtual void SAL_CALL modified( const lang::EventObject& aEvent ) override;
+    // XPaintListener:
+    virtual void SAL_CALL windowPaint( const awt::PaintEvent& e ) override;
+
+    // WeakComponentImplHelperBase:
+    virtual void SAL_CALL disposing() override;
+
+    void updateClip();
+
+private:
+    typedef std::vector< std::weak_ptr<SlideViewLayer> > ViewLayerVector;
+
+    /// Prune viewlayers from deceased ones, optionally update them
+    void pruneLayers( bool bWithViewLayerUpdate=false ) const;
+
+    /** Max fill level of maViewLayers, before we try to prune it from
+        deceased layers
+    */
+    enum{ LAYER_ULLAGE=8 };
+
+    uno::Reference<presentation::XSlideShowView>              mxView;
+    cppcanvas::SpriteCanvasSharedPtr                          mpCanvas;
+
+    EventMultiplexer&                                         mrEventMultiplexer;
+    EventQueue&                                               mrEventQueue;
+
+    mutable LayerSpriteContainer                              maSprites;
+    mutable ViewLayerVector                                   maViewLayers;
+
+    basegfx::B2DPolyPolygon                                   maClip;
+
+    basegfx::B2DHomMatrix                                     maViewTransform;
+    basegfx::B2DSize                                          maUserSize;
+    bool mbIsSoundEnabled;
+};
+
+
+SlideView::SlideView( const uno::Reference<presentation::XSlideShowView>& xView,
+                      EventQueue&                                         rEventQueue,
+                      EventMultiplexer&                                   rEventMultiplexer ) :
+    SlideViewBase( m_aMutex ),
+    mxView( xView ),
+    mpCanvas(),
+    mrEventMultiplexer( rEventMultiplexer ),
+    mrEventQueue( rEventQueue ),
+    maSprites(),
+    maViewLayers(),
+    maClip(),
+    maViewTransform(),
+    maUserSize( 1.0, 1.0 ), // default size: one-by-one rectangle
+    mbIsSoundEnabled(true)
+{
+    // take care not constructing any UNO references to this _inside_
+    // ctor, shift that code to createSlideView()!
+    ENSURE_OR_THROW( mxView.is(),
+                      "SlideView::SlideView(): Invalid view" );
+
+    mpCanvas = cppcanvas::VCLFactory::createSpriteCanvas(
+        xView->getCanvas() );
+    ENSURE_OR_THROW( mpCanvas,
+                      "Could not create cppcanvas" );
+
+    geometry::AffineMatrix2D aViewTransform(
+        xView->getTransformation() );
+
+    if( basegfx::fTools::equalZero(
+            basegfx::B2DVector(aViewTransform.m00,
+                               aViewTransform.m10).getLength()) ||
+        basegfx::fTools::equalZero(
+            basegfx::B2DVector(aViewTransform.m01,
+                               aViewTransform.m11).getLength()) )
+    {
+        OSL_FAIL( "SlideView::SlideView(): Singular matrix!" );
+
+        canvas::tools::setIdentityAffineMatrix2D(aViewTransform);
+    }
+
+    basegfx::unotools::homMatrixFromAffineMatrix(
+        maViewTransform, aViewTransform );
+
+    // once and forever: set fixed prio to this 'layer' (we're always
+    // the background layer)
+    maSprites.setLayerPriority( basegfx::B1DRange(0.0,1.0) );
+}
+
+void SlideView::disposing()
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    maViewLayers.clear();
+    maSprites.clear();
+    mpCanvas.reset();
+
+    // additionally, also de-register from XSlideShowView
+    if (mxView.is())
+    {
+        mxView->removeTransformationChangedListener( this );
+        mxView->removePaintListener( this );
+        mxView.clear();
+    }
+}
+
+ViewLayerSharedPtr SlideView::createViewLayer( const basegfx::B2DRange& rLayerBounds ) const
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    ENSURE_OR_THROW( mpCanvas,
+                      "SlideView::createViewLayer(): Disposed" );
+
+    const std::size_t nNumLayers( maViewLayers.size() );
+
+    // avoid filling up layer vector with lots of deceased layer weak
+    // ptrs
+    if( nNumLayers > LAYER_ULLAGE )
+        pruneLayers();
+
+    auto xViewLayer = std::make_shared<SlideViewLayer>(mpCanvas,
+                                                       getTransformation(),
+                                                       rLayerBounds,
+                                                       maUserSize,
+                                                       this);
+    maViewLayers.push_back(xViewLayer);
+
+    return xViewLayer;
+}
+
+bool SlideView::updateScreen() const
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    ENSURE_OR_RETURN_FALSE( mpCanvas,
+                       "SlideView::updateScreen(): Disposed" );
+
+    return mpCanvas->updateScreen( false );
+}
+
+bool SlideView::paintScreen() const
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    ENSURE_OR_RETURN_FALSE( mpCanvas,
+                       "SlideView::paintScreen(): Disposed" );
+
+    return mpCanvas->updateScreen( true );
+}
+
+void SlideView::clear() const
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    OSL_ENSURE( mxView.is() && mpCanvas,
+                "SlideView::clear(): Disposed" );
+    if( !mxView.is() || !mpCanvas )
+        return;
+
+    // keep layer clip
+    clearRect(getCanvas()->clone(),
+              getLayerBoundsPixel(
+                  basegfx::B2DRange(0,0,
+                                    maUserSize.getX(),
+                                    maUserSize.getY()),
+                  getTransformation()));
+}
+
+void SlideView::clearAll() const
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    OSL_ENSURE( mxView.is() && mpCanvas,
+                "SlideView::clear(): Disposed" );
+    if( !mxView.is() || !mpCanvas )
+        return;
+
+    mpCanvas->clear(); // this is unnecessary, strictly speaking. but
+                       // it makes the SlideView behave exactly like a
+                       // sprite-based SlideViewLayer, because those
+                       // are created from scratch after a resize
+
+    // clear whole view
+    mxView->clear();
+}
+
+void SlideView::setViewSize( const basegfx::B2DSize& rSize )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    maUserSize = rSize;
+    updateCanvas();
+}
+
+void SlideView::setCursorShape( sal_Int16 nPointerShape )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (mxView.is())
+        mxView->setMouseCursor( nPointerShape );
+}
+
+bool SlideView::isOnView(ViewSharedPtr const& rView) const
+{
+    return rView.get() == this;
+}
+
+cppcanvas::CanvasSharedPtr SlideView::getCanvas() const
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    ENSURE_OR_THROW( mpCanvas,
+                      "SlideView::getCanvas(): Disposed" );
+
+    return mpCanvas;
+}
+
+cppcanvas::CustomSpriteSharedPtr SlideView::createSprite(
+    const basegfx::B2DSize& rSpriteSizePixel,
+    double                  nPriority ) const
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    ENSURE_OR_THROW( mpCanvas, "SlideView::createSprite(): Disposed" );
+
+    cppcanvas::CustomSpriteSharedPtr pSprite(
+        mpCanvas->createCustomSprite( rSpriteSizePixel ) );
+
+    maSprites.addSprite( pSprite,
+                         nPriority );
+
+    return pSprite;
+}
+
+void SlideView::setPriority( const basegfx::B1DRange& /*rRange*/ )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    OSL_FAIL( "SlideView::setPriority() is a NOOP for slide view - "
+                "content will always be shown in the background" );
+}
+
+basegfx::B2DHomMatrix SlideView::getTransformation() const
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    basegfx::B2DHomMatrix aMatrix;
+    aMatrix.scale( 1.0/maUserSize.getX(), 1.0/maUserSize.getY() );
+
+    return maViewTransform * aMatrix;
+}
+
+geometry::IntegerSize2D SlideView::getTranslationOffset() const
+{
+    return mxView->getTranslationOffset();
+}
+
+basegfx::B2DHomMatrix SlideView::getSpriteTransformation() const
+{
+    return getTransformation();
+}
+
+void SlideView::setClip( const basegfx::B2DPolyPolygon& rClip )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    basegfx::B2DPolyPolygon aNewClip = prepareClip( rClip );
+
+    if( aNewClip != maClip )
+    {
+        maClip = aNewClip;
+
+        updateClip();
+    }
+}
+
+bool SlideView::resize( const ::basegfx::B2DRange& /*rArea*/ )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    OSL_FAIL( "SlideView::resize(): ignored for the View, can't change size "
+                "effectively, anyway" );
+
+    return false;
+}
+
+uno::Reference<presentation::XSlideShowView> SlideView::getUnoView() const
+{
+    osl::MutexGuard aGuard( m_aMutex );
+    return mxView;
+}
+
+void SlideView::setIsSoundEnabled (const bool bValue)
+{
+    mbIsSoundEnabled = bValue;
+}
+
+bool SlideView::isSoundEnabled() const
+{
+    return mbIsSoundEnabled;
+}
+
+void SlideView::_dispose()
+{
+    dispose();
+}
+
+// XEventListener
+void SlideView::disposing( lang::EventObject const& evt )
+{
+    // no deregistration necessary anymore, XView has left:
+    osl::MutexGuard const guard( m_aMutex );
+
+    if (mxView.is())
+    {
+        OSL_ASSERT( evt.Source == mxView );
+        mxView.clear();
+    }
+
+    dispose();
+}
+
+// silly wrapper to check that event handlers don't touch dead SlideView
+struct WeakRefWrapper
+{
+    SlideView & m_rObj;
+    uno::WeakReference<uno::XInterface> const m_wObj;
+    std::function<void (SlideView&)> const m_func;
+
+    WeakRefWrapper(SlideView & rObj, std::function<void (SlideView&)> const& func)
+        : m_rObj(rObj)
+        , m_wObj(static_cast<::cppu::OWeakObject*>(&rObj))
+        , m_func(func)
+    {
+    }
+
+    void operator()()
+    {
+        uno::Reference<uno::XInterface> const xObj(m_wObj);
+        if (xObj.is())
+        {
+            m_func(m_rObj);
+        }
+    }
+};
+
+// XModifyListener
+void SlideView::modified( const lang::EventObject& /*aEvent*/ )
+{
+    osl::MutexGuard const guard( m_aMutex );
+
+    OSL_ENSURE( mxView.is(), "SlideView::modified(): "
+                "Disposed, but event received from XSlideShowView?!");
+
+    if( !mxView.is() )
+        return;
+
+    geometry::AffineMatrix2D aViewTransform(
+        mxView->getTransformation() );
+
+    if( basegfx::fTools::equalZero(
+            basegfx::B2DVector(aViewTransform.m00,
+                               aViewTransform.m10).getLength()) ||
+        basegfx::fTools::equalZero(
+            basegfx::B2DVector(aViewTransform.m01,
+                               aViewTransform.m11).getLength()) )
+    {
+        OSL_FAIL( "SlideView::modified(): Singular matrix!" );
+
+        canvas::tools::setIdentityAffineMatrix2D(aViewTransform);
+    }
+
+    // view transformation really changed?
+    basegfx::B2DHomMatrix aNewTransform;
+    basegfx::unotools::homMatrixFromAffineMatrix(
+        aNewTransform,
+        aViewTransform );
+
+    if( aNewTransform == maViewTransform )
+        return; // No change, nothing to do
+
+    maViewTransform = aNewTransform;
+
+    updateCanvas();
+
+    // notify view change. Don't call EventMultiplexer directly, this
+    // might not be the main thread!
+    mrEventQueue.addEvent(
+        makeEvent( WeakRefWrapper(*this,
+            [] (SlideView & rThis) { rThis.mrEventMultiplexer.notifyViewChanged(rThis.mxView); }),
+                   "EventMultiplexer::notifyViewChanged"));
+}
+
+// XPaintListener
+void SlideView::windowPaint( const awt::PaintEvent& /*e*/ )
+{
+    osl::MutexGuard aGuard( m_aMutex );
+
+    OSL_ENSURE( mxView.is() && mpCanvas, "Disposed, but event received?!" );
+
+    // notify view clobbering. Don't call EventMultiplexer directly,
+    // this might not be the main thread!
+    mrEventQueue.addEvent(
+        makeEvent( WeakRefWrapper(*this,
+            [] (SlideView & rThis) { rThis.mrEventMultiplexer.notifyViewClobbered(rThis.mxView); }),
+                   "EventMultiplexer::notifyViewClobbered") );
+}
+
+void SlideView::updateCanvas()
+{
+    OSL_ENSURE( mpCanvas,
+                "SlideView::updateCanvasTransform(): Disposed" );
+
+    if( !mpCanvas || !mxView.is())
+        return;
+
+    clearAll();
+    mpCanvas->setTransformation( getTransformation() );
+    mpCanvas->setClip(
+        createClipPolygon( maClip,
+                           mpCanvas,
+                           maUserSize ));
+
+    // forward update to viewlayers
+    pruneLayers( true );
+}
+
+void SlideView::updateClip()
+{
+    OSL_ENSURE( mpCanvas,
+                "SlideView::updateClip(): Disposed" );
+
+    if( !mpCanvas )
+        return;
+
+    mpCanvas->setClip(
+        createClipPolygon( maClip,
+                           mpCanvas,
+                           maUserSize ));
+
+    pruneLayers();
+}
+
+void SlideView::pruneLayers( bool bWithViewLayerUpdate ) const
+{
+    ViewLayerVector aValidLayers;
+
+    const basegfx::B2DHomMatrix& rCurrTransform(
+        getTransformation() );
+
+    // check all layers for validity, and retain only the live ones
+    for( const auto& rView : maViewLayers )
+    {
+        std::shared_ptr< SlideViewLayer > xCurrLayer( rView.lock() );
+
+        if ( xCurrLayer )
+        {
+            aValidLayers.push_back( xCurrLayer );
+
+            if( bWithViewLayerUpdate )
+                xCurrLayer->updateView( rCurrTransform,
+                                        maUserSize );
+        }
+    }
+
+    // replace layer list with pruned one
+    maViewLayers.swap( aValidLayers );
+}
+
+} // anonymous namespace
+
+UnoViewSharedPtr createSlideView( uno::Reference< presentation::XSlideShowView> const& xView,
+                                  EventQueue&                                          rEventQueue,
+                                  EventMultiplexer&                                    rEventMultiplexer )
+{
+    std::shared_ptr<SlideView> const that(
+        comphelper::make_shared_from_UNO(
+            new SlideView(xView,
+                          rEventQueue,
+                          rEventMultiplexer)));
+
+    // register listeners with XSlideShowView
+    xView->addTransformationChangedListener( that.get() );
+    xView->addPaintListener( that.get() );
+
+    // set new transformation
+    that->updateCanvas();
+
+    return that;
+}
+
+} // namespace slideshow
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */