Adding upstream version 1:7.0.4.upstream/1%7.0.4upstream

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

11 files changed, 1278 insertions, 0 deletions

diff --git a/include/basegfx/utils/b2dclipstate.hxx b/include/basegfx/utils/b2dclipstate.hxx
new file mode 100644
index 000000000..f4d9d9e7d
--- /dev/null
+++ b/include/basegfx/utils/b2dclipstate.hxx
@@ -0,0 +1,92 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <o3tl/cow_wrapper.hxx>
+#include <basegfx/basegfxdllapi.h>
+
+
+namespace basegfx
+{
+    class B2DRange;
+    class B2DPolyPolygon;
+    class B2DHomMatrix;
+}
+
+namespace basegfx::utils
+{
+        class ImplB2DClipState;
+
+        /** This class provides an optimized, symbolic clip state for graphical output
+
+            Having a current 'clip' state is a common attribute of
+            almost all graphic output APIs, most of which internally
+            represent it via a list of rectangular bands. In contrast,
+            this implementation purely uses symbolic clips, but in a
+            quite efficient manner, deferring actual evaluation until
+            a clip representation is requested, and using faster code
+            paths for common special cases (like all-rectangle clips)
+         */
+        class BASEGFX_DLLPUBLIC B2DClipState
+        {
+        public:
+            typedef o3tl::cow_wrapper< ImplB2DClipState > ImplType;
+
+        private:
+            ImplType mpImpl;
+
+        public:
+            /// Init clip, in 'cleared' state - everything is visible
+            B2DClipState();
+            ~B2DClipState();
+            B2DClipState( const B2DClipState& );
+            B2DClipState( B2DClipState&& );
+            explicit B2DClipState( const B2DPolyPolygon& );
+            B2DClipState& operator=( const B2DClipState& );
+            B2DClipState& operator=( B2DClipState&& );
+
+            /// Set clip to 'null' - nothing is visible
+            void makeNull();
+
+            /// returns true when clip is 'cleared' - everything is visible
+            bool isCleared() const;
+
+            bool operator==(const B2DClipState&) const;
+            bool operator!=(const B2DClipState&) const;
+
+            void unionRange(const B2DRange& );
+            void unionPolyPolygon(const B2DPolyPolygon& );
+
+            void intersectRange(const B2DRange& );
+            void intersectPolyPolygon(const B2DPolyPolygon& );
+
+            void subtractRange(const B2DRange& );
+            void subtractPolyPolygon(const B2DPolyPolygon& );
+
+            void xorRange(const B2DRange& );
+            void xorPolyPolygon(const B2DPolyPolygon& );
+
+            void transform(const B2DHomMatrix& );
+
+            B2DPolyPolygon const & getClipPoly() const;
+        };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/basegfx/utils/canvastools.hxx b/include/basegfx/utils/canvastools.hxx
new file mode 100644
index 000000000..d4cfa0a5c
--- /dev/null
+++ b/include/basegfx/utils/canvastools.hxx
@@ -0,0 +1,165 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <basegfx/basegfxdllapi.h>
+
+
+namespace com::sun::star::geometry
+{
+    struct AffineMatrix2D;
+    struct AffineMatrix3D;
+    struct RealPoint2D;
+    struct RealSize2D;
+    struct RealRectangle2D;
+    struct RealRectangle3D;
+    struct IntegerSize2D;
+    struct IntegerRectangle2D;
+    struct RealBezierSegment2D;
+}
+
+namespace com::sun::star::rendering
+{
+    class  XGraphicDevice;
+    class  XPolyPolygon2D;
+}
+
+namespace com::sun::star::awt
+{
+    struct Rectangle;
+}
+
+namespace basegfx
+{
+    class B2DHomMatrix;
+    class B3DHomMatrix;
+    class B2DVector;
+    class B2DPoint;
+    class B2DRange;
+    class B3DRange;
+    class B2IVector;
+    class B2IRange;
+    class B2DPolygon;
+    class B2DPolyPolygon;
+}
+
+namespace basegfx::unotools
+{
+        // Polygon conversions
+
+
+        BASEGFX_DLLPUBLIC css::uno::Reference< css::rendering::XPolyPolygon2D >
+            xPolyPolygonFromB2DPolygon( const css::uno::Reference< css::rendering::XGraphicDevice >&  xGraphicDevice,
+                                        const ::basegfx::B2DPolygon&                        rPoly    );
+
+        BASEGFX_DLLPUBLIC css::uno::Reference< css::rendering::XPolyPolygon2D >
+            xPolyPolygonFromB2DPolyPolygon( const css::uno::Reference< css::rendering::XGraphicDevice >& xGraphicDevice,
+                                            const ::basegfx::B2DPolyPolygon&                    rPolyPoly    );
+
+
+        BASEGFX_DLLPUBLIC css::uno::Sequence<
+              css::uno::Sequence< css::geometry::RealBezierSegment2D > >
+                    bezierSequenceSequenceFromB2DPolyPolygon( const ::basegfx::B2DPolyPolygon& rPolyPoly );
+
+        BASEGFX_DLLPUBLIC css::uno::Sequence<
+              css::uno::Sequence< css::geometry::RealPoint2D > >
+                    pointSequenceSequenceFromB2DPolyPolygon( const ::basegfx::B2DPolyPolygon& rPolyPoly );
+
+        BASEGFX_DLLPUBLIC ::basegfx::B2DPolygon polygonFromPoint2DSequence(
+            const css::uno::Sequence< css::geometry::RealPoint2D >& rPoints );
+
+        BASEGFX_DLLPUBLIC ::basegfx::B2DPolyPolygon polyPolygonFromPoint2DSequenceSequence(
+            const css::uno::Sequence< css::uno::Sequence< css::geometry::RealPoint2D > >& rPoints );
+
+        BASEGFX_DLLPUBLIC ::basegfx::B2DPolygon polygonFromBezier2DSequence(
+            const css::uno::Sequence< css::geometry::RealBezierSegment2D >& rPoints );
+
+        BASEGFX_DLLPUBLIC ::basegfx::B2DPolyPolygon polyPolygonFromBezier2DSequenceSequence(
+            const css::uno::Sequence< css::uno::Sequence< css::geometry::RealBezierSegment2D > >& rPoints );
+
+        BASEGFX_DLLPUBLIC ::basegfx::B2DPolyPolygon b2DPolyPolygonFromXPolyPolygon2D(
+            const css::uno::Reference< css::rendering::XPolyPolygon2D >& rPoly );
+
+        // Matrix conversions
+
+
+        BASEGFX_DLLPUBLIC css::geometry::AffineMatrix2D&
+            affineMatrixFromHomMatrix( css::geometry::AffineMatrix2D&  matrix,
+                                       const ::basegfx::B2DHomMatrix&               transform);
+
+        BASEGFX_DLLPUBLIC css::geometry::AffineMatrix3D& affineMatrixFromHomMatrix3D(
+            css::geometry::AffineMatrix3D& matrix,
+            const ::basegfx::B3DHomMatrix& transform);
+
+        BASEGFX_DLLPUBLIC ::basegfx::B2DHomMatrix&
+            homMatrixFromAffineMatrix( ::basegfx::B2DHomMatrix&                transform,
+                                       const css::geometry::AffineMatrix2D&    matrix );
+
+        BASEGFX_DLLPUBLIC ::basegfx::B3DHomMatrix homMatrixFromAffineMatrix3D( const css::geometry::AffineMatrix3D& matrix );
+
+        // Geometry conversions
+
+
+        BASEGFX_DLLPUBLIC css::geometry::RealSize2D        size2DFromB2DSize( const ::basegfx::B2DVector& );
+        BASEGFX_DLLPUBLIC css::geometry::RealPoint2D       point2DFromB2DPoint( const ::basegfx::B2DPoint& );
+        BASEGFX_DLLPUBLIC css::geometry::RealRectangle2D   rectangle2DFromB2DRectangle( const ::basegfx::B2DRange& );
+        BASEGFX_DLLPUBLIC css::geometry::RealRectangle3D   rectangle3DFromB3DRectangle( const ::basegfx::B3DRange& );
+
+        BASEGFX_DLLPUBLIC ::basegfx::B2DPoint       b2DPointFromRealPoint2D( const css::geometry::RealPoint2D& );
+        BASEGFX_DLLPUBLIC ::basegfx::B2DRange       b2DRectangleFromRealRectangle2D( const css::geometry::RealRectangle2D& );
+        BASEGFX_DLLPUBLIC ::basegfx::B3DRange       b3DRectangleFromRealRectangle3D( const css::geometry::RealRectangle3D& );
+
+        BASEGFX_DLLPUBLIC css::geometry::IntegerSize2D         integerSize2DFromB2ISize( const ::basegfx::B2IVector& );
+
+        BASEGFX_DLLPUBLIC ::basegfx::B2IVector      b2ISizeFromIntegerSize2D( const css::geometry::IntegerSize2D& );
+        BASEGFX_DLLPUBLIC ::basegfx::B2IRange       b2IRectangleFromIntegerRectangle2D( const css::geometry::IntegerRectangle2D& );
+
+        BASEGFX_DLLPUBLIC ::basegfx::B2IRange       b2IRectangleFromAwtRectangle( const css::awt::Rectangle& );
+
+        // Geometry comparisons
+
+
+        /** Return smalltest integer range, which completely contains
+            given floating point range.
+
+            @param rRange
+            Input range. Values must be within the representable
+            bounds of sal_Int32
+
+            @return the closest integer range, which completely
+            contains rRange.
+         */
+        BASEGFX_DLLPUBLIC ::basegfx::B2IRange   b2ISurroundingRangeFromB2DRange( const ::basegfx::B2DRange& rRange );
+
+        /** Return smalltest B2DRange with integer values, which
+            completely contains given floating point range.
+
+            @param rRange
+            Input range.
+
+            @return the closest B2DRange with integer coordinates,
+            which completely contains rRange.
+         */
+        BASEGFX_DLLPUBLIC ::basegfx::B2DRange   b2DSurroundingIntegerRangeFromB2DRange( const ::basegfx::B2DRange& rRange );
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/basegfx/utils/common.hxx b/include/basegfx/utils/common.hxx
new file mode 100644
index 000000000..1c11a8bf2
--- /dev/null
+++ b/include/basegfx/utils/common.hxx
@@ -0,0 +1,33 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+namespace basegfx
+{
+// The axis or dimension in a 2D coordinate system
+enum class Axis2D
+{
+    X,
+    Y
+};
+
+} // end of namespace basegfx
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/basegfx/utils/gradienttools.hxx b/include/basegfx/utils/gradienttools.hxx
new file mode 100644
index 000000000..331e2998b
--- /dev/null
+++ b/include/basegfx/utils/gradienttools.hxx
@@ -0,0 +1,401 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <config_options.h>
+#include <basegfx/point/b2dpoint.hxx>
+#include <basegfx/vector/b2dvector.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/basegfxdllapi.h>
+
+namespace basegfx { class B2DRange; }
+
+namespace basegfx
+{
+    /** Gradient definition as used in ODF 1.2
+
+        This struct collects all data necessary for rendering ODF
+        1.2-compatible gradients. Use the createXXXODFGradientInfo()
+        methods below for initializing from ODF attributes.
+     */
+    class UNLESS_MERGELIBS(BASEGFX_DLLPUBLIC) ODFGradientInfo
+    {
+    private:
+        /** transformation mapping from [0,1]^2 texture coordinate
+           space to [0,1]^2 shape coordinate space
+         */
+        B2DHomMatrix    maTextureTransform;
+
+        /** transformation mapping from [0,1]^2 shape coordinate space
+           to [0,1]^2 texture coordinate space. This is the
+           transformation commonly used to create gradients from a
+           scanline rasterizer (put shape u/v coordinates into it, get
+           texture s/t coordinates out of it)
+         */
+        B2DHomMatrix    maBackTextureTransform;
+
+        /** Aspect ratio of the gradient. Only used in drawinglayer
+           for generating nested gradient polygons currently. Already
+           catered for in the transformations above.
+         */
+        double          mfAspectRatio;
+
+        /** Requested gradient steps to render. See the
+           implementations of the getXXXGradientAlpha() methods below,
+           the semantic differs slightly for the different gradient
+           types.
+         */
+        sal_uInt32      mnSteps;
+
+    public:
+        ODFGradientInfo()
+        :   maTextureTransform(),
+            maBackTextureTransform(),
+            mfAspectRatio(1.0),
+            mnSteps(0)
+        {
+        }
+
+        ODFGradientInfo(
+            const B2DHomMatrix& rTextureTransform,
+            double fAspectRatio,
+            sal_uInt32 nSteps)
+        :   maTextureTransform(rTextureTransform),
+            maBackTextureTransform(),
+            mfAspectRatio(fAspectRatio),
+            mnSteps(nSteps)
+        {
+        }
+
+        ODFGradientInfo(const ODFGradientInfo& rODFGradientInfo)
+        :   maTextureTransform(rODFGradientInfo.getTextureTransform()),
+            maBackTextureTransform(rODFGradientInfo.maBackTextureTransform),
+            mfAspectRatio(rODFGradientInfo.getAspectRatio()),
+            mnSteps(rODFGradientInfo.getSteps())
+        {
+        }
+
+        ODFGradientInfo& operator=(const ODFGradientInfo& rODFGradientInfo)
+        {
+            maTextureTransform = rODFGradientInfo.getTextureTransform();
+            maBackTextureTransform = rODFGradientInfo.maBackTextureTransform;
+            mfAspectRatio = rODFGradientInfo.getAspectRatio();
+            mnSteps = rODFGradientInfo.getSteps();
+
+            return *this;
+        }
+
+        // compare operator
+        bool operator==(const ODFGradientInfo& rGeoTexSvx) const;
+
+        const B2DHomMatrix& getTextureTransform() const { return maTextureTransform; }
+        const B2DHomMatrix& getBackTextureTransform() const;
+        double getAspectRatio() const { return mfAspectRatio; }
+        sal_uInt32 getSteps() const { return mnSteps; }
+
+        void setTextureTransform(const B2DHomMatrix& rNew)
+        {
+            maTextureTransform = rNew;
+            maBackTextureTransform.identity();
+        }
+    };
+
+    namespace utils
+    {
+        /** Create matrix for ODF's linear gradient definition
+
+            Note that odf linear gradients are varying in y direction.
+
+            @param o_rGradientInfo
+            Receives the calculated texture transformation matrix (for
+            use with standard [0,1]x[0,1] texture coordinates)
+
+            @param rTargetArea
+            Output area, needed for aspect ratio calculations and
+            texture transformation
+
+            @param nSteps
+            Number of gradient steps (from ODF)
+
+            @param fBorder
+            Width of gradient border (from ODF)
+
+            @param fAngle
+            Gradient angle (from ODF)
+         */
+        BASEGFX_DLLPUBLIC ODFGradientInfo createLinearODFGradientInfo(
+            const B2DRange& rTargetArea,
+            sal_uInt32 nSteps,
+            double fBorder,
+            double fAngle);
+
+
+        /** Calculate linear gradient blend value
+
+            This method generates you the lerp alpha value for
+            blending linearly between gradient start and end color,
+            according to the formula (startCol*(1.0-alpha) + endCol*alpha)
+
+            @param rUV
+            Current uv coordinate. Values outside [0,1] will be
+            clamped. Assumes gradient color varies along the y axis.
+
+            @param rGradInfo
+            Gradient info, for transformation and number of steps
+         */
+        BASEGFX_DLLPUBLIC double getLinearGradientAlpha(const B2DPoint& rUV,
+            const ODFGradientInfo& rGradInfo);
+
+        /** Create matrix for ODF's axial gradient definition
+
+            Note that odf axial gradients are varying in y
+            direction. Note further that you can map the axial
+            gradient to a linear gradient (in case you want or need to
+            avoid an extra gradient renderer), by using
+            createLinearODFGradientInfo() instead, shifting the
+            resulting texture transformation by 0.5 to the top and
+            appending the same stop colors again, but mirrored.
+
+            @param o_rGradientInfo
+            Receives the calculated texture transformation matrix (for
+            use with standard [0,1]x[0,1] texture coordinates)
+
+            @param rTargetArea
+            Output area, needed for aspect ratio calculations and
+            texture transformation
+
+            @param nSteps
+            Number of gradient steps (from ODF)
+
+            @param fBorder
+            Width of gradient border (from ODF)
+
+            @param fAngle
+            Gradient angle (from ODF)
+         */
+        BASEGFX_DLLPUBLIC ODFGradientInfo createAxialODFGradientInfo(
+            const B2DRange& rTargetArea,
+            sal_uInt32 nSteps,
+            double fBorder,
+            double fAngle);
+
+
+        /** Calculate axial gradient blend value
+
+            This method generates you the lerp alpha value for
+            blending linearly between gradient start and end color,
+            according to the formula (startCol*(1.0-alpha) + endCol*alpha)
+
+            @param rUV
+            Current uv coordinate. Values outside [0,1] will be
+            clamped. Assumes gradient color varies along the y axis.
+
+            @param rGradInfo
+            Gradient info, for transformation and number of steps
+         */
+        BASEGFX_DLLPUBLIC double getAxialGradientAlpha(const B2DPoint& rUV,
+            const ODFGradientInfo& rGradInfo);
+
+        /** Create matrix for ODF's radial gradient definition
+
+            @param o_rGradientInfo
+            Receives the calculated texture transformation matrix (for
+            use with standard [0,1]x[0,1] texture coordinates)
+
+            @param rTargetArea
+            Output area, needed for aspect ratio calculations and
+            texture transformation
+
+            @param rOffset
+            Gradient offset value (from ODF)
+
+            @param nSteps
+            Number of gradient steps (from ODF)
+
+            @param fBorder
+            Width of gradient border (from ODF)
+
+            @param fAngle
+            Gradient angle (from ODF)
+         */
+        BASEGFX_DLLPUBLIC ODFGradientInfo createRadialODFGradientInfo(
+            const B2DRange& rTargetArea,
+            const B2DVector& rOffset,
+            sal_uInt32 nSteps,
+            double fBorder);
+
+
+        /** Calculate radial gradient blend value
+
+            This method generates you the lerp alpha value for
+            blending linearly between gradient start and end color,
+            according to the formula (startCol*(1.0-alpha) + endCol*alpha)
+
+            @param rUV
+            Current uv coordinate. Values outside [0,1] will be
+            clamped.
+
+            @param rGradInfo
+            Gradient info, for transformation and number of steps
+         */
+        BASEGFX_DLLPUBLIC double getRadialGradientAlpha(const B2DPoint& rUV,
+            const ODFGradientInfo& rGradInfo);
+
+        /** Create matrix for ODF's elliptical gradient definition
+
+            @param o_rGradientInfo
+            Receives the calculated texture transformation matrix (for
+            use with standard [0,1]x[0,1] texture coordinates)
+
+            @param rTargetArea
+            Output area, needed for aspect ratio calculations and
+            texture transformation
+
+            @param rOffset
+            Gradient offset value (from ODF)
+
+            @param nSteps
+            Number of gradient steps (from ODF)
+
+            @param fBorder
+            Width of gradient border (from ODF)
+
+            @param fAngle
+            Gradient angle (from ODF)
+         */
+        BASEGFX_DLLPUBLIC ODFGradientInfo createEllipticalODFGradientInfo(
+            const B2DRange& rTargetArea,
+            const B2DVector& rOffset,
+            sal_uInt32 nSteps,
+            double fBorder,
+            double fAngle);
+
+
+        /** Calculate elliptical gradient blend value
+
+            This method generates you the lerp alpha value for
+            blending linearly between gradient start and end color,
+            according to the formula (startCol*(1.0-alpha) + endCol*alpha)
+
+            @param rUV
+            Current uv coordinate. Values outside [0,1] will be
+            clamped.
+
+            @param rGradInfo
+            Gradient info, for transformation and number of steps
+         */
+        BASEGFX_DLLPUBLIC double getEllipticalGradientAlpha(const B2DPoint& rUV,
+            const ODFGradientInfo& rGradInfo);
+
+        /** Create matrix for ODF's square gradient definition
+
+            @param o_rGradientInfo
+            Receives the calculated texture transformation matrix (for
+            use with standard [0,1]x[0,1] texture coordinates)
+
+            @param rTargetArea
+            Output area, needed for aspect ratio calculations and
+            texture transformation
+
+            @param rOffset
+            Gradient offset value (from ODF)
+
+            @param nSteps
+            Number of gradient steps (from ODF)
+
+            @param fBorder
+            Width of gradient border (from ODF)
+
+            @param fAngle
+            Gradient angle (from ODF)
+         */
+        BASEGFX_DLLPUBLIC ODFGradientInfo createSquareODFGradientInfo(
+            const B2DRange& rTargetArea,
+            const B2DVector& rOffset,
+            sal_uInt32 nSteps,
+            double fBorder,
+            double fAngle);
+
+
+        /** Calculate square gradient blend value
+
+            This method generates you the lerp alpha value for
+            blending linearly between gradient start and end color,
+            according to the formula (startCol*(1.0-alpha) + endCol*alpha)
+
+            @param rUV
+            Current uv coordinate. Values outside [0,1] will be
+            clamped.
+
+            @param rGradInfo
+            Gradient info, for transformation and number of steps
+         */
+        BASEGFX_DLLPUBLIC double getSquareGradientAlpha(const B2DPoint& rUV,
+            const ODFGradientInfo& rGradInfo);
+
+        /** Create matrix for ODF's rectangular gradient definition
+
+            @param o_rGradientInfo
+            Receives the calculated texture transformation matrix (for
+            use with standard [0,1]x[0,1] texture coordinates)
+
+            @param rTargetArea
+            Output area, needed for aspect ratio calculations and
+            texture transformation
+
+            @param rOffset
+            Gradient offset value (from ODF)
+
+            @param nSteps
+            Number of gradient steps (from ODF)
+
+            @param fBorder
+            Width of gradient border (from ODF)
+
+            @param fAngle
+            Gradient angle (from ODF)
+         */
+        BASEGFX_DLLPUBLIC ODFGradientInfo createRectangularODFGradientInfo(
+            const B2DRange& rTargetArea,
+            const B2DVector& rOffset,
+            sal_uInt32 nSteps,
+            double fBorder,
+            double fAngle);
+
+
+        /** Calculate rectangular gradient blend value
+
+            This method generates you the lerp alpha value for
+            blending linearly between gradient start and end color,
+            according to the formula (startCol*(1.0-alpha) + endCol*alpha)
+
+            @param rUV
+            Current uv coordinate. Values outside [0,1] will be
+            clamped.
+
+            @param rGradInfo
+            Gradient info, for transformation and number of steps
+         */
+        BASEGFX_DLLPUBLIC double getRectangularGradientAlpha(const B2DPoint& rUV,
+            const ODFGradientInfo& rGradInfo);
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/basegfx/utils/keystoplerp.hxx b/include/basegfx/utils/keystoplerp.hxx
new file mode 100644
index 000000000..302020ac3
--- /dev/null
+++ b/include/basegfx/utils/keystoplerp.hxx
@@ -0,0 +1,85 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <vector>
+#include <basegfx/basegfxdllapi.h>
+
+namespace com::sun::star::uno {
+    template<typename T> class Sequence;
+}
+
+namespace basegfx::utils
+{
+        /** Lerp in a vector of key stops
+
+            This class holds a key stop vector and provides the
+            functionality to lerp inside it. Useful e.g. for
+            multi-stop gradients, or the SMIL key time activity.
+
+            For those, given a global [0,1] lerp alpha, one need to
+            find the suitable bucket index from key stop vector, and
+            then calculate the relative alpha between the two buckets
+            found.
+         */
+        class BASEGFX_DLLPUBLIC KeyStopLerp
+        {
+        public:
+            typedef std::pair<std::ptrdiff_t,double> ResultType;
+
+            /** Create lerper with given vector of stops
+
+                @param rKeyStops
+
+                Vector of stops, must contain at least two elements
+                (though preferably more, otherwise you probably don't
+                need key stop lerping in the first place). All
+                elements must be of monotonically increasing value.
+             */
+            explicit KeyStopLerp( const std::vector<double>& rKeyStops );
+
+            /** Create lerper with given sequence of stops
+
+                @param rKeyStops
+
+                Sequence of stops, must contain at least two elements
+                (though preferably more, otherwise you probably don't
+                need key stop lerping in the first place). All
+                elements must be of monotonically increasing value.
+             */
+            explicit KeyStopLerp( const css::uno::Sequence<double>& rKeyStops );
+
+            /** Find two nearest bucket index & interpolate
+
+                @param fAlpha
+                Find bucket index i, with keyStops[i] < fAlpha <=
+                keyStops[i+1]. Return new alpha value in [0,1),
+                proportional to fAlpha's position between keyStops[i]
+                and keyStops[i+1]
+             */
+            ResultType lerp(double fAlpha) const;
+
+        private:
+            std::vector<double>    maKeyStops;
+            mutable std::ptrdiff_t mnLastIndex;
+        };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/basegfx/utils/lerp.hxx b/include/basegfx/utils/lerp.hxx
new file mode 100644
index 000000000..e02b3b0fa
--- /dev/null
+++ b/include/basegfx/utils/lerp.hxx
@@ -0,0 +1,43 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+namespace basegfx::utils
+{
+    /** Generic linear interpolator
+
+        @tpl ValueType
+        Must have operator+ and operator* defined, and should
+        have value semantics.
+
+        @param t
+        As usual, t must be in the [0,1] range
+    */
+    template< typename ValueType > ValueType lerp( const ValueType&     rFrom,
+                                                   const ValueType&     rTo,
+                                                   double               t )
+    {
+        // This is only to suppress a double->int warning. All other
+        // types should be okay here.
+        return static_cast<ValueType>( (1.0-t)*rFrom + t*rTo );
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/basegfx/utils/rectcliptools.hxx b/include/basegfx/utils/rectcliptools.hxx
new file mode 100644
index 000000000..b1354a6ca
--- /dev/null
+++ b/include/basegfx/utils/rectcliptools.hxx
@@ -0,0 +1,72 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/types.h>
+#include <basegfx/range/b2ibox.hxx>
+
+
+namespace basegfx::utils
+{
+    namespace RectClipFlags
+    {
+        static const sal_uInt32 LEFT   = sal_Int32(0x01);
+        static const sal_uInt32 RIGHT  = sal_Int32(0x02);
+        static const sal_uInt32 TOP    = sal_Int32(0x04);
+        static const sal_uInt32 BOTTOM = sal_Int32(0x08);
+    }
+
+    /** Calc clip mask for Cohen-Sutherland rectangle clip
+
+        This function returns a clip mask used for the
+        Cohen-Sutherland rectangle clip method, where one or more
+        of the lower four bits are set, if the given point is
+        outside one or more of the four half planes defining the
+        rectangle (see RectClipFlags for possible values)
+     */
+    template< class Point, class Rect > inline
+       sal_uInt32 getCohenSutherlandClipFlags( const Point& rP,
+                                               const Rect&  rR )
+    {
+        // maxY | minY | maxX | minX
+        sal_uInt32 clip;
+        clip = (rP.getX() < rR.getMinX()) << 0;
+        clip |= (rP.getX() > rR.getMaxX()) << 1;
+        clip |= (rP.getY() < rR.getMinY()) << 2;
+        clip |= (rP.getY() > rR.getMaxY()) << 3;
+        return clip;
+    }
+
+    /// Cohen-Sutherland mask calculation - overload for boxes.
+    template< class Point > inline
+       sal_uInt32 getCohenSutherlandClipFlags( const Point&  rP,
+                                               const B2IBox& rB )
+    {
+        // maxY | minY | maxX | minX
+        sal_uInt32 clip;
+        clip = (rP.getX() <  rB.getMinX()) << 0;
+        clip |= (rP.getX() >= rB.getMaxX()) << 1;
+        clip |= (rP.getY() <  rB.getMinY()) << 2;
+        clip |= (rP.getY() >= rB.getMaxY()) << 3;
+        return clip;
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/basegfx/utils/systemdependentdata.hxx b/include/basegfx/utils/systemdependentdata.hxx
new file mode 100644
index 000000000..120e39a0e
--- /dev/null
+++ b/include/basegfx/utils/systemdependentdata.hxx
@@ -0,0 +1,134 @@
+/* -*- 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/.
+ */
+
+#pragma once
+
+#include <sal/types.h>
+#include <basegfx/basegfxdllapi.h>
+#include <memory>
+#include <map>
+#include <set>
+
+namespace basegfx
+{
+    class SystemDependentData;
+    typedef std::shared_ptr<SystemDependentData> SystemDependentData_SharedPtr;
+    typedef std::weak_ptr<SystemDependentData> SystemDependentData_WeakPtr;
+
+    class BASEGFX_DLLPUBLIC SystemDependentDataManager
+    {
+    private:
+        // noncopyable
+        SystemDependentDataManager(const SystemDependentDataManager&) = delete;
+        SystemDependentDataManager& operator=(const SystemDependentDataManager&) = delete;
+
+    public:
+        SystemDependentDataManager();
+        virtual ~SystemDependentDataManager();
+
+        // call from (and with) SystemDependentData objects when start/end/touch
+        // usage is needed
+        virtual void startUsage(basegfx::SystemDependentData_SharedPtr& rData) = 0;
+        virtual void endUsage(basegfx::SystemDependentData_SharedPtr& rData) = 0;
+        virtual void touchUsage(basegfx::SystemDependentData_SharedPtr& rData) = 0;
+
+        // flush all buffered data (e.g. cleanup/shutdown)
+        virtual void flushAll() = 0;
+    };
+
+    class BASEGFX_DLLPUBLIC MinimalSystemDependentDataManager final : public SystemDependentDataManager
+    {
+    private:
+        // example of a minimal SystemDependentDataManager. It *needs to hold*
+        // a SystemDependentData_SharedPtr while SystemDependentDataHolder's will
+        // use a SystemDependentData_WeakPtr. When the held SystemDependentData_SharedPtr
+        // is deleted, the corresponding SystemDependentData_WeakPtr will get void.
+        // To make this work, a minimal SystemDependentDataManager *has* to hold at
+        // least that one SystemDependentData_SharedPtr.
+        // That SystemDependentData_SharedPtr may be (e.g. Timer-based or resource-based)
+        // be freed then. This minimal implementation does never free it, so all stay valid.
+        // The instances may still be removed by endUsage calls, but there is no
+        // caching/buffering mechanism involved here at all. It's an example, but
+        // not used - better use an advanced derivation of SystemDependentDataManager
+        std::set< SystemDependentData_SharedPtr >   maSystemDependentDataReferences;
+
+    public:
+        MinimalSystemDependentDataManager();
+        virtual ~MinimalSystemDependentDataManager() override;
+
+        virtual void startUsage(basegfx::SystemDependentData_SharedPtr& rData) override;
+        virtual void endUsage(basegfx::SystemDependentData_SharedPtr& rData) override;
+        virtual void touchUsage(basegfx::SystemDependentData_SharedPtr& rData) override;
+        virtual void flushAll() override;
+    };
+
+    class BASEGFX_DLLPUBLIC SystemDependentData
+    {
+    private:
+        // noncopyable
+        SystemDependentData(const SystemDependentData&) = delete;
+        SystemDependentData& operator=(const SystemDependentData&) = delete;
+
+        // reference to a SystemDependentDataManager, probably
+        // a single, globally used one, but not necessarily
+        SystemDependentDataManager&     mrSystemDependentDataManager;
+
+        // Buffered CalculatedCycles, result of estimations using
+        // getHoldCyclesInSeconds and estimateUsageInBytes, executed
+        // using getHoldCyclesInSeconds. StartValue is 0 to detect
+        // not-yet-calculated state
+        sal_uInt32                      mnCalculatedCycles;
+
+    public:
+        SystemDependentData(
+            SystemDependentDataManager& rSystemDependentDataManager);
+
+        // CAUTION! It is VERY important to keep this base class
+        // virtual, else typeid(class).hash_code() from derived classes
+        // will NOT work what is ESSENTIAL for the SystemDependentData
+        // mechanism to work properly. So DO NOT REMOVE virtual here, please.
+        virtual ~SystemDependentData();
+
+        // allow access to call startUsage/endUsage/touchUsage
+        // using getSystemDependentDataManager()
+        SystemDependentDataManager& getSystemDependentDataManager() { return mrSystemDependentDataManager; }
+
+        // Calculate HoldCyclesInSeconds based on using
+        // getHoldCyclesInSeconds and estimateUsageInBytes, the
+        // result is created once on-demand and buffered in
+        // mnCalculatedCycles
+        sal_uInt32 calculateCombinedHoldCyclesInSeconds() const;
+
+        // Size estimation of the entry in bytes - does not have to
+        // be used, but should be. Default returns zero what
+        // means there is no size estimation available. Override to
+        // offer useful data if you want to have better caching.
+        virtual sal_Int64 estimateUsageInBytes() const;
+    };
+
+    class BASEGFX_DLLPUBLIC SystemDependentDataHolder
+    {
+    private:
+        // Possibility to hold System-Dependent B2DPolygon-Representations
+        std::map< size_t, SystemDependentData_WeakPtr > maSystemDependentReferences;
+
+        // noncopyable
+        SystemDependentDataHolder(const SystemDependentDataHolder&) = delete;
+        SystemDependentDataHolder& operator=(const SystemDependentDataHolder&) = delete;
+
+    public:
+        SystemDependentDataHolder();
+        virtual ~SystemDependentDataHolder();
+
+        void addOrReplaceSystemDependentData(SystemDependentData_SharedPtr& rData);
+        SystemDependentData_SharedPtr getSystemDependentData(size_t hash_code) const;
+    };
+} // end of namespace basegfx
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/basegfx/utils/tools.hxx b/include/basegfx/utils/tools.hxx
new file mode 100644
index 000000000..f8fc61999
--- /dev/null
+++ b/include/basegfx/utils/tools.hxx
@@ -0,0 +1,124 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <sal/types.h>
+#include <basegfx/basegfxdllapi.h>
+
+namespace basegfx
+{
+    class B2DPoint;
+    class B2DRange;
+    class B2DPolyPolygon;
+}
+
+namespace basegfx::utils
+{
+        /** Expand given parallelogram, such that it extends beyond
+            bound rect in a given direction.
+
+            This method is useful when e.g. generating one-dimensional
+            gradients, such as linear or axial gradients: those
+            gradients vary only in one direction, the other has
+            constant color. Most of the time, those gradients extends
+            infinitely in the direction with the constant color, but
+            practically, one always has a limiting bound rect into
+            which the gradient is painted. The method at hand now
+            extends a given parallelogram (e.g. the transformed
+            bounding box of a gradient) virtually into infinity to the
+            top and to the bottom (i.e. normal to the line io_rLeftTop
+            io_rRightTop), such that the given rectangle is guaranteed
+            to be covered in that direction.
+
+            @attention There might be some peculiarities with this
+            method, that might limit its usage to the described
+            gradients. One of them is the fact that when determining
+            how far the parallelogram has to be extended to the top or
+            the bottom, the upper and lower border are assumed to be
+            infinite lines.
+
+            @param io_rLeftTop
+            Left, top edge of the parallelogramm. Note that this need
+            not be the left, top edge geometrically, it's just used
+            when determining the extension direction. Thus, it's
+            perfectly legal to affine-transform a rectangle, and given
+            the transformed point here. On method return, this
+            parameter will contain the adapted output.
+
+            @param io_rLeftBottom
+            Left, bottom edge of the parallelogramm. Note that this need
+            not be the left, bottom edge geometrically, it's just used
+            when determining the extension direction. Thus, it's
+            perfectly legal to affine-transform a rectangle, and given
+            the transformed point here. On method return, this
+            parameter will contain the adapted output.
+
+            @param io_rRightTop
+            Right, top edge of the parallelogramm. Note that this need
+            not be the right, top edge geometrically, it's just used
+            when determining the extension direction. Thus, it's
+            perfectly legal to affine-transform a rectangle, and given
+            the transformed point here. On method return, this
+            parameter will contain the adapted output.
+
+            @param io_rRightBottom
+            Right, bottom edge of the parallelogramm. Note that this need
+            not be the right, bottom edge geometrically, it's just used
+            when determining the extension direction. Thus, it's
+            perfectly legal to affine-transform a rectangle, and given
+            the transformed point here. On method return, this
+            parameter will contain the adapted output.
+
+            @param rFitTarget
+            The rectangle to fit the parallelogram into.
+         */
+        BASEGFX_DLLPUBLIC void infiniteLineFromParallelogram( ::basegfx::B2DPoint&      io_rLeftTop,
+                                            ::basegfx::B2DPoint&        io_rLeftBottom,
+                                            ::basegfx::B2DPoint&        io_rRightTop,
+                                            ::basegfx::B2DPoint&        io_rRightBottom,
+                                            const ::basegfx::B2DRange&  rFitTarget  );
+
+        /** Creates polypolygon with the given number as seven-segment
+            digits
+
+            @param fVal
+            Value to convert
+
+            @param nTotalDigits
+            Total number of digits to display. If less is needed for
+            given number, fill space with blanks.
+
+            @param nDecPlaces
+            Decimal places to show. When 0, display as integer. When
+            negative, fill given number of before-the-decimal point
+            with zero.
+
+            @param bLitSegments
+            When true, return a polygon containing the segments that
+            are 'lit' for the given number. Return un-lit segments
+            otherwise.
+         */
+        BASEGFX_DLLPUBLIC B2DPolyPolygon number2PolyPolygon(double    fVal,
+                                                            sal_Int32 nTotalDigits,
+                                                            sal_Int32 nDecPlaces,
+                                                            bool      bLitSegments=true);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/basegfx/utils/unopolypolygon.hxx b/include/basegfx/utils/unopolypolygon.hxx
new file mode 100644
index 000000000..da95ebff2
--- /dev/null
+++ b/include/basegfx/utils/unopolypolygon.hxx
@@ -0,0 +1,105 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/compbase.hxx>
+#include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/rendering/FillRule.hpp>
+#include <com/sun/star/rendering/XLinePolyPolygon2D.hpp>
+#include <com/sun/star/rendering/XBezierPolyPolygon2D.hpp>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <basegfx/basegfxdllapi.h>
+
+namespace basegfx::unotools
+{
+    typedef cppu::WeakComponentImplHelper<
+            css::rendering::XLinePolyPolygon2D,
+            css::rendering::XBezierPolyPolygon2D,
+            css::lang::XServiceInfo > UnoPolyPolygonBase;
+
+    class BASEGFX_DLLPUBLIC UnoPolyPolygon
+        : private cppu::BaseMutex
+        , public UnoPolyPolygonBase
+    {
+    public:
+        explicit UnoPolyPolygon( const B2DPolyPolygon& );
+
+        // XPolyPolygon2D
+        virtual void SAL_CALL addPolyPolygon( const css::geometry::RealPoint2D& position, const css::uno::Reference< css::rendering::XPolyPolygon2D >& polyPolygon ) override;
+        virtual ::sal_Int32 SAL_CALL getNumberOfPolygons(  ) override;
+        virtual ::sal_Int32 SAL_CALL getNumberOfPolygonPoints( ::sal_Int32 polygon ) override;
+        virtual css::rendering::FillRule SAL_CALL getFillRule(  ) override;
+        virtual void SAL_CALL setFillRule( css::rendering::FillRule fillRule ) override;
+        virtual sal_Bool SAL_CALL isClosed( ::sal_Int32 index ) override;
+        virtual void SAL_CALL setClosed( ::sal_Int32 index, sal_Bool closedState ) override;
+
+        // XLinePolyPolygon2D
+        virtual css::uno::Sequence< css::uno::Sequence< css::geometry::RealPoint2D > > SAL_CALL getPoints( ::sal_Int32 nPolygonIndex, ::sal_Int32 nNumberOfPolygons, ::sal_Int32 nPointIndex, ::sal_Int32 nNumberOfPoints ) override;
+        virtual void SAL_CALL setPoints( const css::uno::Sequence< css::uno::Sequence< css::geometry::RealPoint2D > >& points, ::sal_Int32 nPolygonIndex ) override;
+        virtual css::geometry::RealPoint2D SAL_CALL getPoint( ::sal_Int32 nPolygonIndex, ::sal_Int32 nPointIndex ) override;
+        virtual void SAL_CALL setPoint( const css::geometry::RealPoint2D& point, ::sal_Int32 nPolygonIndex, ::sal_Int32 nPointIndex ) override;
+
+        // XBezierPolyPolygon2D
+        virtual css::uno::Sequence< css::uno::Sequence< css::geometry::RealBezierSegment2D > > SAL_CALL getBezierSegments( ::sal_Int32 nPolygonIndex, ::sal_Int32 nNumberOfPolygons, ::sal_Int32 nPointIndex, ::sal_Int32 nNumberOfPoints ) override;
+        virtual void SAL_CALL setBezierSegments( const css::uno::Sequence< css::uno::Sequence< css::geometry::RealBezierSegment2D > >& points, ::sal_Int32 nPolygonIndex ) override;
+        virtual css::geometry::RealBezierSegment2D SAL_CALL getBezierSegment( ::sal_Int32 nPolygonIndex, ::sal_Int32 nPointIndex ) override;
+        virtual void SAL_CALL setBezierSegment( const css::geometry::RealBezierSegment2D& point, ::sal_Int32 nPolygonIndex, ::sal_Int32 nPointIndex ) override;
+
+        // 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;
+
+        B2DPolyPolygon getPolyPolygon() const;
+
+    protected:
+        /// Check whether index is a valid polygon index
+        void checkIndex( sal_Int32 nIndex ) const // throw (css::lang::IndexOutOfBoundsException);
+        {
+            if( nIndex < 0 || nIndex >= static_cast<sal_Int32>(maPolyPoly.count()) )
+                throw css::lang::IndexOutOfBoundsException();
+        }
+
+        B2DPolyPolygon getSubsetPolyPolygon( sal_Int32 nPolygonIndex,
+                                             sal_Int32 nNumberOfPolygons,
+                                             sal_Int32 nPointIndex,
+                                             sal_Int32 nNumberOfPoints ) const;
+
+        /// Get cow copy of internal polygon. not thread-safe outside this object.
+        const B2DPolyPolygon& getPolyPolygonUnsafe() const
+        {
+            return maPolyPoly;
+        }
+
+        /// Called whenever internal polypolygon gets modified
+        virtual void modifying() const {}
+
+    private:
+        UnoPolyPolygon(const UnoPolyPolygon&) = delete;
+        UnoPolyPolygon& operator=(const UnoPolyPolygon&) = delete;
+
+        B2DPolyPolygon                        maPolyPoly;
+        css::rendering::FillRule              meFillRule;
+    };
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/basegfx/utils/zoomtools.hxx b/include/basegfx/utils/zoomtools.hxx
new file mode 100644
index 000000000..4d85e5dec
--- /dev/null
+++ b/include/basegfx/utils/zoomtools.hxx
@@ -0,0 +1,24 @@
+/* -*- 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/.
+ */
+
+#pragma once
+
+#include <basegfx/basegfxdllapi.h>
+
+namespace basegfx::zoomtools
+{
+
+/** This namespace provides functions for optimized geometric zooming
+*/
+BASEGFX_DLLPUBLIC long zoomOut(long nCurrent);
+BASEGFX_DLLPUBLIC long zoomIn(long nCurrent);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */