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diff --git a/sdext/source/presenter/PresenterSprite.cxx b/sdext/source/presenter/PresenterSprite.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "PresenterSprite.hxx"
+
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/rendering/CompositeOperation.hpp>
+#include <com/sun/star/rendering/RenderState.hpp>
+#include <com/sun/star/rendering/ViewState.hpp>
+
+using namespace ::com::sun::star;
+using ::com::sun::star::uno::Reference;
+using ::com::sun::star::uno::UNO_QUERY;
+
+namespace sdext::presenter {
+
+PresenterSprite::PresenterSprite()
+ : maSize(0,0),
+ maLocation(0,0),
+ mbIsVisible(false)
+{
+}
+
+PresenterSprite::~PresenterSprite()
+{
+ if (mxSprite.is())
+ {
+ mxSprite->hide();
+ Reference<lang::XComponent> xComponent (mxSprite, UNO_QUERY);
+ if (xComponent.is())
+ xComponent->dispose();
+ mxSprite = nullptr;
+ }
+}
+
+void PresenterSprite::SetFactory (
+ const css::uno::Reference<css::rendering::XSpriteCanvas>& rxSpriteFactory)
+{
+ if (mxSpriteFactory != rxSpriteFactory)
+ {
+ DisposeSprite();
+ mxSpriteFactory = rxSpriteFactory;
+ if (mbIsVisible)
+ ProvideSprite();
+ }
+}
+
+css::uno::Reference<css::rendering::XCanvas> PresenterSprite::GetCanvas()
+{
+ ProvideSprite();
+ if (mxSprite.is())
+ return mxSprite->getContentCanvas();
+ else
+ return nullptr;
+}
+
+void PresenterSprite::Show()
+{
+ mbIsVisible = true;
+ if (mxSprite.is())
+ mxSprite->show();
+ else
+ ProvideSprite();
+}
+
+void PresenterSprite::Hide()
+{
+ mbIsVisible = false;
+ if (mxSprite.is())
+ mxSprite->hide();
+}
+
+void PresenterSprite::Resize (const css::geometry::RealSize2D& rSize)
+{
+ maSize = rSize;
+ if (mxSprite.is())
+ DisposeSprite();
+ if (mbIsVisible)
+ ProvideSprite();
+}
+
+void PresenterSprite::MoveTo (const css::geometry::RealPoint2D& rLocation)
+{
+ maLocation = rLocation;
+ if (mxSprite.is())
+ mxSprite->move(
+ maLocation,
+ rendering::ViewState(
+ geometry::AffineMatrix2D(1,0,0, 0,1,0),
+ nullptr),
+ rendering::RenderState(
+ geometry::AffineMatrix2D(1,0,0, 0,1,0),
+ nullptr,
+ uno::Sequence<double>(4),
+ rendering::CompositeOperation::SOURCE)
+ );
+}
+
+void PresenterSprite::Update()
+{
+ if (mxSpriteFactory.is())
+ mxSpriteFactory->updateScreen(false);
+}
+
+void PresenterSprite::ProvideSprite()
+{
+ if ( !(! mxSprite.is()
+ && mxSpriteFactory.is()
+ && maSize.Width>0
+ && maSize.Height>0))
+ return;
+
+ mxSprite = mxSpriteFactory->createCustomSprite(maSize);
+ if (!mxSprite.is())
+ return;
+
+ mxSprite->move(maLocation,
+ rendering::ViewState(
+ geometry::AffineMatrix2D(1,0,0, 0,1,0),
+ nullptr),
+ rendering::RenderState(
+ geometry::AffineMatrix2D(1,0,0, 0,1,0),
+ nullptr,
+ uno::Sequence<double>(4),
+ rendering::CompositeOperation::SOURCE)
+ );
+ mxSprite->setAlpha(1.0);
+ mxSprite->setPriority(0);
+ if (mbIsVisible)
+ mxSprite->show();
+}
+
+void PresenterSprite::DisposeSprite()
+{
+ if (mxSprite.is())
+ {
+ mxSprite->hide();
+ Reference<lang::XComponent> xComponent (mxSprite, UNO_QUERY);
+ if (xComponent.is())
+ xComponent->dispose();
+ mxSprite = nullptr;
+ }
+}
+
+} //end of namespace sdext::presenter
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */