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

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

1 files changed, 790 insertions, 0 deletions

diff --git a/sd/source/ui/presenter/PresenterCanvas.cxx b/sd/source/ui/presenter/PresenterCanvas.cxx
new file mode 100644
index 000000000..f586969bc
--- /dev/null
+++ b/sd/source/ui/presenter/PresenterCanvas.cxx
@@ -0,0 +1,790 @@
+/* -*- 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 "PresenterCanvas.hxx"
+#include "CanvasUpdateRequester.hxx"
+
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <basegfx/polygon/b2dpolygonclipper.hxx>
+#include <basegfx/range/b2drectangle.hxx>
+#include <basegfx/utils/canvastools.hxx>
+#include <com/sun/star/awt/XWindow.hpp>
+#include <comphelper/compbase.hxx>
+#include <rtl/ref.hxx>
+#include <toolkit/helper/vclunohelper.hxx>
+#include <vcl/window.hxx>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace sd::presenter {
+
+//===== PresenterCustomSprite =================================================
+
+/** Wrapper around a sprite that is displayed on a PresenterCanvas.
+*/
+namespace {
+    typedef comphelper::WeakComponentImplHelper <
+        css::rendering::XCustomSprite
+    > PresenterCustomSpriteInterfaceBase;
+
+class PresenterCustomSprite final
+    : public PresenterCustomSpriteInterfaceBase
+{
+public:
+    PresenterCustomSprite (
+        const rtl::Reference<PresenterCanvas>& rpCanvas,
+        const Reference<rendering::XCustomSprite>& rxSprite,
+        const Reference<awt::XWindow>& rxBaseWindow);
+    PresenterCustomSprite(const PresenterCustomSprite&) = delete;
+    PresenterCustomSprite& operator=(const PresenterCustomSprite&) = delete;
+    virtual void disposing(std::unique_lock<std::mutex>&) override;
+
+    // XSprite
+
+    virtual void SAL_CALL setAlpha (double nAlpha) override;
+
+    virtual void SAL_CALL move (const geometry::RealPoint2D& rNewPos,
+        const rendering::ViewState& rViewState,
+        const rendering::RenderState& rRenderState) override;
+
+    virtual void SAL_CALL transform (const geometry::AffineMatrix2D& rTransformation) override;
+
+    virtual void SAL_CALL clip (const Reference<rendering::XPolyPolygon2D>& rClip) override;
+
+    virtual void SAL_CALL setPriority (double nPriority) override;
+
+    virtual void SAL_CALL show() override;
+
+    virtual void SAL_CALL hide() override;
+
+    // XCustomSprite
+
+    virtual Reference<rendering::XCanvas> SAL_CALL getContentCanvas() override;
+
+private:
+    rtl::Reference<PresenterCanvas> mpCanvas;
+    Reference<rendering::XCustomSprite> mxSprite;
+    Reference<awt::XWindow> mxBaseWindow;
+    geometry::RealPoint2D maPosition;
+
+    /// @throws css::lang::DisposedException
+    void ThrowIfDisposed();
+};
+
+}
+
+//===== PresenterCanvas =======================================================
+
+PresenterCanvas::PresenterCanvas (
+    const Reference<rendering::XSpriteCanvas>& rxUpdateCanvas,
+    const Reference<awt::XWindow>& rxUpdateWindow,
+    const Reference<rendering::XCanvas>& rxSharedCanvas,
+    const Reference<awt::XWindow>& rxSharedWindow,
+    const Reference<awt::XWindow>& rxWindow)
+    : mxUpdateCanvas(rxUpdateCanvas),
+      mxUpdateWindow(rxUpdateWindow),
+      mxSharedCanvas(rxSharedCanvas),
+      mxSharedWindow(rxSharedWindow),
+      mxWindow(rxWindow),
+      mbOffsetUpdatePending(true)
+{
+    if (mxWindow.is())
+        mxWindow->addWindowListener(this);
+
+    if (mxUpdateCanvas.is())
+    {
+        m_pUpdateRequester = CanvasUpdateRequester::Instance(mxUpdateCanvas);
+    }
+}
+
+PresenterCanvas::~PresenterCanvas()
+{
+}
+
+void PresenterCanvas::disposing(std::unique_lock<std::mutex>&)
+{
+    if (mxWindow.is())
+    {
+        mxWindow->removeWindowListener(this);
+        mxWindow.clear();
+    }
+}
+
+//----- XCanvas ---------------------------------------------------------------
+
+void SAL_CALL PresenterCanvas::clear()
+{
+    ThrowIfDisposed();
+    // ToDo: Clear the area covered by the child window.  A simple forward
+    // would clear the whole shared canvas.
+}
+
+void SAL_CALL PresenterCanvas::drawPoint (
+    const css::geometry::RealPoint2D& aPoint,
+    const css::rendering::ViewState& aViewState,
+    const css::rendering::RenderState& aRenderState)
+{
+    ThrowIfDisposed();
+    mxSharedCanvas->drawPoint(aPoint,MergeViewState(aViewState),aRenderState);
+}
+
+void SAL_CALL PresenterCanvas::drawLine (
+        const css::geometry::RealPoint2D& aStartPoint,
+        const css::geometry::RealPoint2D& aEndPoint,
+        const css::rendering::ViewState& aViewState,
+        const css::rendering::RenderState& aRenderState)
+{
+    ThrowIfDisposed();
+    mxSharedCanvas->drawLine(aStartPoint,aEndPoint,MergeViewState(aViewState),aRenderState);
+}
+
+void SAL_CALL PresenterCanvas::drawBezier (
+        const css::geometry::RealBezierSegment2D& aBezierSegment,
+        const css::geometry::RealPoint2D& aEndPoint,
+        const css::rendering::ViewState& aViewState,
+        const css::rendering::RenderState& aRenderState)
+{
+    ThrowIfDisposed();
+    mxSharedCanvas->drawBezier(aBezierSegment,aEndPoint,MergeViewState(aViewState),aRenderState);
+}
+
+css::uno::Reference<css::rendering::XCachedPrimitive> SAL_CALL PresenterCanvas::drawPolyPolygon (
+        const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon,
+        const css::rendering::ViewState& aViewState,
+        const css::rendering::RenderState& aRenderState)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->drawPolyPolygon(
+        xPolyPolygon, MergeViewState(aViewState), aRenderState);
+}
+
+css::uno::Reference<css::rendering::XCachedPrimitive> SAL_CALL PresenterCanvas::strokePolyPolygon (
+        const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon,
+        const css::rendering::ViewState& aViewState,
+        const css::rendering::RenderState& aRenderState,
+        const css::rendering::StrokeAttributes& aStrokeAttributes)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->strokePolyPolygon(
+        xPolyPolygon, MergeViewState(aViewState), aRenderState, aStrokeAttributes);
+}
+
+css::uno::Reference<css::rendering::XCachedPrimitive> SAL_CALL
+        PresenterCanvas::strokeTexturedPolyPolygon (
+            const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon,
+            const css::rendering::ViewState& aViewState,
+            const css::rendering::RenderState& aRenderState,
+            const css::uno::Sequence< css::rendering::Texture >& aTextures,
+            const css::rendering::StrokeAttributes& aStrokeAttributes)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->strokeTexturedPolyPolygon(
+        xPolyPolygon, MergeViewState(aViewState), aRenderState, aTextures, aStrokeAttributes);
+}
+
+css::uno::Reference<css::rendering::XCachedPrimitive> SAL_CALL
+        PresenterCanvas::strokeTextureMappedPolyPolygon(
+            const css::uno::Reference<css::rendering::XPolyPolygon2D >& xPolyPolygon,
+            const css::rendering::ViewState& aViewState,
+            const css::rendering::RenderState& aRenderState,
+            const css::uno::Sequence<css::rendering::Texture>& aTextures,
+            const css::uno::Reference<css::geometry::XMapping2D>& xMapping,
+            const css::rendering::StrokeAttributes& aStrokeAttributes)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->strokeTextureMappedPolyPolygon(
+        xPolyPolygon,
+        MergeViewState(aViewState),
+        aRenderState,
+        aTextures,
+        xMapping,
+        aStrokeAttributes);
+}
+
+css::uno::Reference<css::rendering::XPolyPolygon2D> SAL_CALL
+        PresenterCanvas::queryStrokeShapes(
+            const css::uno::Reference<css::rendering::XPolyPolygon2D>& xPolyPolygon,
+            const css::rendering::ViewState& aViewState,
+            const css::rendering::RenderState& aRenderState,
+            const css::rendering::StrokeAttributes& aStrokeAttributes)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->queryStrokeShapes(
+        xPolyPolygon, MergeViewState(aViewState), aRenderState, aStrokeAttributes);
+}
+
+css::uno::Reference<css::rendering::XCachedPrimitive> SAL_CALL
+        PresenterCanvas::fillPolyPolygon(
+            const css::uno::Reference<css::rendering::XPolyPolygon2D>& xPolyPolygon,
+            const css::rendering::ViewState& aViewState,
+            const css::rendering::RenderState& aRenderState)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->fillPolyPolygon(
+        xPolyPolygon, MergeViewState(aViewState), aRenderState);
+}
+
+css::uno::Reference<css::rendering::XCachedPrimitive> SAL_CALL
+        PresenterCanvas::fillTexturedPolyPolygon(
+            const css::uno::Reference<css::rendering::XPolyPolygon2D>& xPolyPolygon,
+            const css::rendering::ViewState& aViewState,
+            const css::rendering::RenderState& aRenderState,
+            const css::uno::Sequence<css::rendering::Texture>& xTextures)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->fillTexturedPolyPolygon(
+        xPolyPolygon, MergeViewState(aViewState), aRenderState, xTextures);
+}
+
+css::uno::Reference<css::rendering::XCachedPrimitive> SAL_CALL
+        PresenterCanvas::fillTextureMappedPolyPolygon(
+            const css::uno::Reference< css::rendering::XPolyPolygon2D >& xPolyPolygon,
+            const css::rendering::ViewState& aViewState,
+            const css::rendering::RenderState& aRenderState,
+            const css::uno::Sequence< css::rendering::Texture >& xTextures,
+            const css::uno::Reference< css::geometry::XMapping2D >& xMapping)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->fillTextureMappedPolyPolygon(
+        xPolyPolygon, MergeViewState(aViewState), aRenderState, xTextures, xMapping);
+}
+
+css::uno::Reference<css::rendering::XCanvasFont> SAL_CALL
+        PresenterCanvas::createFont(
+            const css::rendering::FontRequest& aFontRequest,
+            const css::uno::Sequence< css::beans::PropertyValue >& aExtraFontProperties,
+            const css::geometry::Matrix2D& aFontMatrix)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->createFont(
+        aFontRequest, aExtraFontProperties, aFontMatrix);
+}
+
+css::uno::Sequence<css::rendering::FontInfo> SAL_CALL
+        PresenterCanvas::queryAvailableFonts(
+            const css::rendering::FontInfo& aFilter,
+            const css::uno::Sequence< css::beans::PropertyValue >& aFontProperties)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->queryAvailableFonts(aFilter, aFontProperties);
+}
+
+css::uno::Reference<css::rendering::XCachedPrimitive> SAL_CALL
+        PresenterCanvas::drawText(
+            const css::rendering::StringContext& aText,
+            const css::uno::Reference< css::rendering::XCanvasFont >& xFont,
+            const css::rendering::ViewState& aViewState,
+            const css::rendering::RenderState& aRenderState,
+            ::sal_Int8 nTextDirection)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->drawText(
+        aText, xFont, MergeViewState(aViewState), aRenderState, nTextDirection);
+}
+
+css::uno::Reference<css::rendering::XCachedPrimitive> SAL_CALL
+        PresenterCanvas::drawTextLayout(
+            const css::uno::Reference< css::rendering::XTextLayout >& xLayoutetText,
+            const css::rendering::ViewState& aViewState,
+            const css::rendering::RenderState& aRenderState)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->drawTextLayout(
+        xLayoutetText, MergeViewState(aViewState), aRenderState);
+}
+
+css::uno::Reference<css::rendering::XCachedPrimitive> SAL_CALL
+        PresenterCanvas::drawBitmap(
+            const css::uno::Reference< css::rendering::XBitmap >& xBitmap,
+            const css::rendering::ViewState& aViewState,
+            const css::rendering::RenderState& aRenderState)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->drawBitmap(
+        xBitmap, MergeViewState(aViewState), aRenderState);
+}
+
+css::uno::Reference<css::rendering::XCachedPrimitive> SAL_CALL
+        PresenterCanvas::drawBitmapModulated(
+            const css::uno::Reference< css::rendering::XBitmap>& xBitmap,
+            const css::rendering::ViewState& aViewState,
+            const css::rendering::RenderState& aRenderState)
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->drawBitmapModulated(
+        xBitmap, MergeViewState(aViewState), aRenderState);
+}
+
+css::uno::Reference<css::rendering::XGraphicDevice> SAL_CALL
+        PresenterCanvas::getDevice()
+{
+    ThrowIfDisposed();
+    return mxSharedCanvas->getDevice();
+}
+
+//----- XSpriteCanvas ---------------------------------------------------------
+
+Reference<rendering::XAnimatedSprite> SAL_CALL
+    PresenterCanvas::createSpriteFromAnimation (
+        const css::uno::Reference<css::rendering::XAnimation>& rAnimation)
+{
+    ThrowIfDisposed();
+
+    Reference<rendering::XSpriteCanvas> xSpriteCanvas (mxSharedCanvas, UNO_QUERY);
+    if (xSpriteCanvas.is())
+        return xSpriteCanvas->createSpriteFromAnimation(rAnimation);
+    else
+        return nullptr;
+}
+
+Reference<rendering::XAnimatedSprite> SAL_CALL
+    PresenterCanvas::createSpriteFromBitmaps (
+        const css::uno::Sequence<
+            css::uno::Reference< css::rendering::XBitmap > >& rAnimationBitmaps,
+    ::sal_Int8 nInterpolationMode)
+{
+    ThrowIfDisposed();
+
+    Reference<rendering::XSpriteCanvas> xSpriteCanvas (mxSharedCanvas, UNO_QUERY);
+    if (xSpriteCanvas.is())
+        return xSpriteCanvas->createSpriteFromBitmaps(rAnimationBitmaps, nInterpolationMode);
+    else
+        return nullptr;
+}
+
+Reference<rendering::XCustomSprite> SAL_CALL
+    PresenterCanvas::createCustomSprite (
+        const css::geometry::RealSize2D& rSpriteSize)
+{
+    ThrowIfDisposed();
+
+    Reference<rendering::XSpriteCanvas> xSpriteCanvas (mxSharedCanvas, UNO_QUERY);
+    if (xSpriteCanvas.is())
+        return new PresenterCustomSprite(
+            this,
+            xSpriteCanvas->createCustomSprite(rSpriteSize),
+            mxSharedWindow);
+    else if (mxUpdateCanvas.is())
+        return new PresenterCustomSprite(
+            this,
+            mxUpdateCanvas->createCustomSprite(rSpriteSize),
+            mxUpdateWindow);
+    else
+        return nullptr;
+}
+
+Reference<rendering::XSprite> SAL_CALL
+    PresenterCanvas::createClonedSprite (
+        const css::uno::Reference< css::rendering::XSprite >& rxOriginal)
+{
+    ThrowIfDisposed();
+
+    Reference<rendering::XSpriteCanvas> xSpriteCanvas (mxSharedCanvas, UNO_QUERY);
+    if (xSpriteCanvas.is())
+        return xSpriteCanvas->createClonedSprite(rxOriginal);
+    if (mxUpdateCanvas.is())
+        return mxUpdateCanvas->createClonedSprite(rxOriginal);
+    return nullptr;
+}
+
+sal_Bool SAL_CALL PresenterCanvas::updateScreen (sal_Bool bUpdateAll)
+{
+    ThrowIfDisposed();
+
+    mbOffsetUpdatePending = true;
+    if (m_pUpdateRequester != nullptr)
+    {
+        m_pUpdateRequester->RequestUpdate(bUpdateAll);
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+
+//----- XEventListener --------------------------------------------------------
+
+void SAL_CALL PresenterCanvas::disposing (const css::lang::EventObject& rEvent)
+{
+    ThrowIfDisposed();
+    if (rEvent.Source == mxWindow)
+        mxWindow = nullptr;
+}
+
+//----- XWindowListener -------------------------------------------------------
+
+void SAL_CALL PresenterCanvas::windowResized (const css::awt::WindowEvent&)
+{
+    ThrowIfDisposed();
+    mbOffsetUpdatePending = true;
+}
+
+void SAL_CALL PresenterCanvas::windowMoved (const css::awt::WindowEvent&)
+{
+    ThrowIfDisposed();
+    mbOffsetUpdatePending = true;
+}
+
+void SAL_CALL PresenterCanvas::windowShown (const css::lang::EventObject&)
+{
+    ThrowIfDisposed();
+    mbOffsetUpdatePending = true;
+}
+
+void SAL_CALL PresenterCanvas::windowHidden (const css::lang::EventObject&)
+{
+    ThrowIfDisposed();
+}
+
+//----- XBitmap ---------------------------------------------------------------
+
+geometry::IntegerSize2D SAL_CALL PresenterCanvas::getSize()
+{
+    ThrowIfDisposed();
+
+    if (mxWindow.is())
+    {
+        const awt::Rectangle aWindowBox (mxWindow->getPosSize());
+        return geometry::IntegerSize2D(aWindowBox.Width, aWindowBox.Height);
+    }
+    else
+        return geometry::IntegerSize2D(0,0);
+}
+
+sal_Bool SAL_CALL PresenterCanvas::hasAlpha()
+{
+    Reference<rendering::XBitmap> xBitmap (mxSharedCanvas, UNO_QUERY);
+    if (xBitmap.is())
+        return xBitmap->hasAlpha();
+    else
+        return false;
+}
+
+Reference<rendering::XBitmap> SAL_CALL PresenterCanvas::getScaledBitmap(
+    const css::geometry::RealSize2D&,
+    sal_Bool)
+{
+    ThrowIfDisposed();
+
+    // Not implemented.
+
+    return nullptr;
+}
+
+rendering::ViewState PresenterCanvas::MergeViewState (
+    const rendering::ViewState& rViewState)
+{
+    // Make sure the offset is up-to-date.
+    if (mbOffsetUpdatePending)
+        maOffset = GetOffset(mxSharedWindow);
+    return MergeViewState(rViewState, maOffset);
+}
+
+css::rendering::ViewState PresenterCanvas::MergeViewState (
+    const css::rendering::ViewState& rViewState,
+    const css::awt::Point& rOffset)
+{
+    // Early rejects.
+    if ( ! mxSharedCanvas.is())
+        return rViewState;
+
+    Reference<rendering::XGraphicDevice> xDevice (mxSharedCanvas->getDevice());
+    if ( ! xDevice.is())
+        return rViewState;
+
+    // Create a modifiable copy of the given view state.
+    rendering::ViewState aViewState (rViewState);
+
+    // Prepare the local clip rectangle.
+    ::basegfx::B2DRectangle aWindowRange (GetClipRectangle(aViewState.AffineTransform, rOffset));
+
+    // Adapt the offset of the view state.
+    aViewState.AffineTransform.m02 += rOffset.X;
+    aViewState.AffineTransform.m12 += rOffset.Y;
+
+    // Adapt the clip polygon.
+    if ( ! aViewState.Clip.is())
+    {
+        // Cancel out the later multiplication with the view state
+        // transformation.
+        aViewState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
+            xDevice,
+            ::basegfx::B2DPolyPolygon(::basegfx::utils::createPolygonFromRect(aWindowRange)));
+    }
+    else
+    {
+        // Have to compute the intersection of the given clipping polygon in
+        // the view state and the local clip rectangle.
+
+        // Clip the view state clipping polygon against the local clip rectangle.
+        const ::basegfx::B2DPolyPolygon aClipPolygon (
+            ::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(
+                aViewState.Clip));
+        const ::basegfx::B2DPolyPolygon aClippedClipPolygon (
+            ::basegfx::utils::clipPolyPolygonOnRange(
+                aClipPolygon,
+                aWindowRange,
+                true, /* bInside */
+                false /* bStroke */));
+
+        aViewState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
+            xDevice,
+            aClippedClipPolygon);
+    }
+
+    return aViewState;
+}
+
+awt::Point PresenterCanvas::GetOffset (const Reference<awt::XWindow>& rxBaseWindow)
+{
+    mbOffsetUpdatePending = false;
+    if (mxWindow.is() && rxBaseWindow.is())
+    {
+        VclPtr<vcl::Window> pWindow = VCLUnoHelper::GetWindow(mxWindow);
+        VclPtr<vcl::Window> pSharedWindow = VCLUnoHelper::GetWindow(rxBaseWindow);
+        if (pWindow && pSharedWindow)
+        {
+            ::tools::Rectangle aBox = pWindow->GetWindowExtentsRelative(pSharedWindow);
+
+            // Calculate offset of this canvas with respect to the shared
+            // canvas.
+            return awt::Point(aBox.Left(), aBox.Top());
+        }
+    }
+
+    return awt::Point(0, 0);
+}
+
+::basegfx::B2DRectangle PresenterCanvas::GetClipRectangle (
+    const css::geometry::AffineMatrix2D& rViewTransform,
+    const awt::Point& rOffset)
+{
+    VclPtr<vcl::Window> pWindow = VCLUnoHelper::GetWindow(mxWindow);
+    if (!pWindow)
+        return ::basegfx::B2DRectangle();
+
+    VclPtr<vcl::Window> pSharedWindow = VCLUnoHelper::GetWindow(mxSharedWindow);
+    if (!pSharedWindow)
+        return ::basegfx::B2DRectangle();
+
+    // Get the bounding box of the window and create a range in the
+    // coordinate system of the child window.
+    // Use the window extents.
+    ::tools::Rectangle aLocalClip = pWindow->GetWindowExtentsRelative(pSharedWindow);
+
+    // The local clip rectangle is used to clip the view state clipping
+    // polygon.
+    ::basegfx::B2DRectangle aWindowRectangle (
+        aLocalClip.Left() - rOffset.X,
+        aLocalClip.Top() - rOffset.Y,
+        aLocalClip.Right() - rOffset.X + 1,
+        aLocalClip.Bottom() - rOffset.Y + 1);
+
+    // Calculate the inverted view state transformation to cancel out a
+    // later transformation of the local clip polygon with the view state
+    // transformation.
+    ::basegfx::B2DHomMatrix aInvertedViewStateTransformation;
+    ::basegfx::unotools::homMatrixFromAffineMatrix(
+        aInvertedViewStateTransformation,
+        rViewTransform);
+    if (aInvertedViewStateTransformation.invert())
+    {
+        // Cancel out the later multiplication with the view state
+        // transformation.
+        aWindowRectangle.transform(aInvertedViewStateTransformation);
+    }
+
+    return aWindowRectangle;
+}
+
+Reference<rendering::XPolyPolygon2D> PresenterCanvas::UpdateSpriteClip (
+    const Reference<rendering::XPolyPolygon2D>& rxOriginalClip,
+    const geometry::RealPoint2D& rLocation)
+{
+    // Check used resources and just return the original clip when not
+    // every one of them is available.
+    if ( ! mxWindow.is())
+        return rxOriginalClip;
+
+    Reference<rendering::XGraphicDevice> xDevice (mxSharedCanvas->getDevice());
+    if ( ! xDevice.is())
+        return rxOriginalClip;
+
+    // Determine the bounds of the clip rectangle (the window border) in the
+    // coordinate system of the sprite.
+    const awt::Rectangle aWindowBox (mxWindow->getPosSize());
+    const double nMinX (-rLocation.X);
+    const double nMinY (-rLocation.Y);
+    const double nMaxX (aWindowBox.Width-rLocation.X);
+    const double nMaxY (aWindowBox.Height-rLocation.Y);
+
+    // Create a clip polygon.
+    Reference<rendering::XPolyPolygon2D> xPolygon;
+    if (rxOriginalClip.is())
+    {
+        // Combine the original clip with the window clip.
+        const ::basegfx::B2DPolyPolygon aOriginalClip (
+            ::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(rxOriginalClip));
+        ::basegfx::B2DRectangle aWindowRange (nMinX, nMinY, nMaxX, nMaxY);
+        const ::basegfx::B2DPolyPolygon aClippedClipPolygon (
+            ::basegfx::utils::clipPolyPolygonOnRange(
+                aOriginalClip,
+                aWindowRange,
+                true, /* bInside */
+                false /* bStroke */));
+        xPolygon = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
+            xDevice,
+            aClippedClipPolygon);
+    }
+    else
+    {
+        // Create a new clip polygon from the window clip rectangle.
+        Sequence<Sequence<geometry::RealPoint2D> > aPoints
+        {
+            {
+                { nMinX,nMinY },
+                { nMaxX,nMinY },
+                { nMaxX,nMaxY },
+                { nMinX,nMaxY }
+            }
+        };
+        Reference<rendering::XLinePolyPolygon2D> xLinePolygon(
+            xDevice->createCompatibleLinePolyPolygon(aPoints));
+        if (xLinePolygon.is())
+            xLinePolygon->setClosed(0, true);
+        xPolygon = xLinePolygon;
+    }
+
+    return xPolygon;
+}
+
+void PresenterCanvas::ThrowIfDisposed()
+{
+    if (m_bDisposed || ! mxSharedCanvas.is())
+    {
+        throw lang::DisposedException ("PresenterCanvas object has already been disposed",
+            static_cast<uno::XWeak*>(this));
+    }
+}
+
+//===== PresenterCustomSprite =================================================
+
+PresenterCustomSprite::PresenterCustomSprite (
+    const rtl::Reference<PresenterCanvas>& rpCanvas,
+    const Reference<rendering::XCustomSprite>& rxSprite,
+    const Reference<awt::XWindow>& rxBaseWindow)
+    : mpCanvas(rpCanvas),
+      mxSprite(rxSprite),
+      mxBaseWindow(rxBaseWindow),
+      maPosition(0,0)
+{
+}
+
+void PresenterCustomSprite::disposing(std::unique_lock<std::mutex>&)
+{
+    Reference<XComponent> xComponent (mxSprite, UNO_QUERY);
+    mxSprite = nullptr;
+    if (xComponent.is())
+        xComponent->dispose();
+    mpCanvas.clear();
+}
+
+//----- XSprite ---------------------------------------------------------------
+
+void SAL_CALL PresenterCustomSprite::setAlpha (const double nAlpha)
+{
+    ThrowIfDisposed();
+    mxSprite->setAlpha(nAlpha);
+}
+
+void SAL_CALL PresenterCustomSprite::move (
+    const geometry::RealPoint2D& rNewPos,
+    const rendering::ViewState& rViewState,
+    const rendering::RenderState& rRenderState)
+{
+    ThrowIfDisposed();
+    maPosition = rNewPos;
+    mxSprite->move(
+        rNewPos,
+        mpCanvas->MergeViewState(rViewState, mpCanvas->GetOffset(mxBaseWindow)),
+        rRenderState);
+    // Clip sprite against window bounds.  This call is necessary because
+    // sprite clipping is done in the coordinate system of the sprite.
+    // Therefore, after each change of the sprites location the window
+    // bounds have to be transformed into the sprites coordinate system.
+    clip(nullptr);
+}
+
+void SAL_CALL PresenterCustomSprite::transform (const geometry::AffineMatrix2D& rTransformation)
+{
+    ThrowIfDisposed();
+    mxSprite->transform(rTransformation);
+}
+
+void SAL_CALL PresenterCustomSprite::clip (const Reference<rendering::XPolyPolygon2D>& rxClip)
+{
+    ThrowIfDisposed();
+    // The clip region is expected in the coordinate system of the sprite.
+    // UpdateSpriteClip() integrates the window bounds, transformed into the
+    // sprites coordinate system, with the given clip.
+    mxSprite->clip(mpCanvas->UpdateSpriteClip(rxClip, maPosition));
+}
+
+void SAL_CALL PresenterCustomSprite::setPriority (const double nPriority)
+{
+    ThrowIfDisposed();
+    mxSprite->setPriority(nPriority);
+}
+
+void SAL_CALL PresenterCustomSprite::show()
+{
+    ThrowIfDisposed();
+    mxSprite->show();
+}
+
+void SAL_CALL PresenterCustomSprite::hide()
+{
+    ThrowIfDisposed();
+    mxSprite->hide();
+}
+
+//----- XCustomSprite ---------------------------------------------------------
+
+Reference<rendering::XCanvas> PresenterCustomSprite::getContentCanvas()
+{
+    ThrowIfDisposed();
+    return mxSprite->getContentCanvas();
+}
+
+void PresenterCustomSprite::ThrowIfDisposed()
+{
+    if (m_bDisposed || ! mxSprite.is())
+    {
+        throw lang::DisposedException ("PresenterCustomSprite object has already been disposed",
+            static_cast<uno::XWeak*>(this));
+    }
+}
+
+} // end of namespace ::sd::presenter
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */