Adding upstream version 4:24.2.0.upstream/4%24.2.0

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

1 files changed, 671 insertions, 0 deletions

diff --git a/cppcanvas/source/mtfrenderer/mtftools.cxx b/cppcanvas/source/mtfrenderer/mtftools.cxx
new file mode 100644
index 0000000000..94a83da70c
--- /dev/null
+++ b/cppcanvas/source/mtfrenderer/mtftools.cxx
@@ -0,0 +1,671 @@
+/* -*- 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/diagnose_ex.hxx>
+#include <com/sun/star/rendering/XCanvas.hpp>
+#include <basegfx/utils/canvastools.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <basegfx/range/b2drectangle.hxx>
+#include <basegfx/vector/b2dvector.hxx>
+#include <canvas/canvastools.hxx>
+#include <rtl/math.hxx>
+#include <vcl/canvastools.hxx>
+#include <vcl/virdev.hxx>
+#include <vcl/metric.hxx>
+#include "mtftools.hxx"
+#include <outdevstate.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+
+
+using namespace ::com::sun::star;
+
+namespace cppcanvas::tools
+{
+        void initRenderState( rendering::RenderState&                   renderState,
+                              const ::cppcanvas::internal::OutDevState& outdevState )
+        {
+            ::canvas::tools::initRenderState( renderState );
+            ::canvas::tools::setRenderStateTransform( renderState,
+                                                      outdevState.transform );
+            renderState.Clip = outdevState.xClipPoly;
+        }
+
+        ::Size getBaselineOffset( const ::cppcanvas::internal::OutDevState& outdevState,
+                                  const VirtualDevice&                      rVDev )
+        {
+            const ::FontMetric& aMetric = rVDev.GetFontMetric();
+
+            // calc offset for text output, the XCanvas always renders
+            // baseline offset.
+            switch( outdevState.textReferencePoint )
+            {
+                case ALIGN_TOP:
+                    return ::Size( 0,
+                                   aMetric.GetInternalLeading() + aMetric.GetAscent() );
+
+                case ALIGN_BASELINE:
+                    return ::Size( 0, 0 );
+
+                case ALIGN_BOTTOM:
+                    return ::Size( 0,
+                                   -aMetric.GetDescent() );
+
+                default:
+                    throw css::uno::RuntimeException(
+                                      "tools::getBaselineOffset(): Unexpected TextAlign value" );
+            }
+        }
+
+        ::basegfx::B2DHomMatrix& calcLogic2PixelLinearTransform( ::basegfx::B2DHomMatrix&   o_rMatrix,
+                                                                 const VirtualDevice&       rVDev )
+        {
+            // select size value in the middle of the available range,
+            // to have headroom both when map mode scales up, and when
+            // it scales down.
+            const ::Size aSizeLogic( 0x00010000L,
+                                     0x00010000L );
+
+            const ::Size aSizePixel( rVDev.LogicToPixel( aSizeLogic ) );
+
+            o_rMatrix = basegfx::utils::createScaleB2DHomMatrix(
+                aSizePixel.Width() / static_cast<double>(aSizeLogic.Width()),
+                aSizePixel.Height() / static_cast<double>(aSizeLogic.Height()) );
+
+            return o_rMatrix;
+        }
+
+        ::basegfx::B2DHomMatrix& calcLogic2PixelAffineTransform( ::basegfx::B2DHomMatrix&   o_rMatrix,
+                                                                 const VirtualDevice&       rVDev )
+        {
+            // retrieves scale
+            calcLogic2PixelLinearTransform(o_rMatrix, rVDev);
+
+            // translate according to curr map mode/pref map mode offset
+            const ::Point  aEmptyPoint;
+            const ::Point& rTranslatedPoint(
+                rVDev.LogicToPixel( aEmptyPoint ));
+
+            o_rMatrix.translate(rTranslatedPoint.X(),
+                                rTranslatedPoint.Y());
+
+            return o_rMatrix;
+        }
+
+        bool modifyClip( rendering::RenderState&                            o_rRenderState,
+                         const struct ::cppcanvas::internal::OutDevState&   rOutdevState,
+                         const CanvasSharedPtr&                             rCanvas,
+                         const ::basegfx::B2DPoint&                         rOffset,
+                         const ::basegfx::B2DVector*                        pScaling,
+                         const double*                                      pRotation )
+        {
+            const bool bOffsetting( !rOffset.equalZero() );
+            const bool bScaling( pScaling &&
+                                 !rtl::math::approxEqual(pScaling->getX(), 1.0) &&
+                                 !rtl::math::approxEqual(pScaling->getY(), 1.0) );
+            const bool bRotation( pRotation &&
+                                  *pRotation != 0.0 );
+
+            if( !bOffsetting && !bScaling && !bRotation )
+                return false; // nothing to do
+
+            if( rOutdevState.clip.count() )
+            {
+                // general polygon case
+
+                ::basegfx::B2DPolyPolygon aLocalClip( rOutdevState.clip );
+                ::basegfx::B2DHomMatrix   aTransform;
+
+                if( bOffsetting )
+                    aTransform.translate( -rOffset.getX(),
+                                          -rOffset.getY() );
+                if( bScaling )
+                    aTransform.scale( 1.0/pScaling->getX(), 1.0/pScaling->getY() );
+
+                if( bRotation )
+                    aTransform.rotate( - *pRotation );
+
+                aLocalClip.transform( aTransform );
+
+                o_rRenderState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
+                    rCanvas->getUNOCanvas()->getDevice(),
+                    aLocalClip );
+
+                return true;
+            }
+            else if( !rOutdevState.clipRect.IsEmpty() )
+            {
+                // simple rect case
+
+                const ::tools::Rectangle aLocalClipRect( rOutdevState.clipRect );
+
+                if( bRotation )
+                {
+                    // rotation involved - convert to polygon first,
+                    // then transform that
+                    ::basegfx::B2DPolygon aLocalClip(
+                        ::basegfx::utils::createPolygonFromRect(
+                                    vcl::unotools::b2DRectangleFromRectangle(aLocalClipRect) ) );
+                    ::basegfx::B2DHomMatrix aTransform;
+
+                    if( bOffsetting )
+                        aTransform.translate( -rOffset.getX(),
+                                              -rOffset.getY() );
+                    if( bScaling )
+                        aTransform.scale( 1.0/pScaling->getX(), 1.0/pScaling->getY() );
+
+                    aTransform.rotate( - *pRotation );
+
+                    aLocalClip.transform( aTransform );
+
+                    o_rRenderState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
+                        rCanvas->getUNOCanvas()->getDevice(),
+                        ::basegfx::B2DPolyPolygon( aLocalClip ) );
+                }
+                else if( bScaling )
+                {
+                    // scale and offset - do it on the fly, have to
+                    // convert to float anyway.
+                    o_rRenderState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
+                        rCanvas->getUNOCanvas()->getDevice(),
+                        ::basegfx::B2DPolyPolygon(
+                            ::basegfx::utils::createPolygonFromRect(
+                                ::basegfx::B2DRectangle(
+                                    (aLocalClipRect.Left() - rOffset.getX())/pScaling->getX(),
+                                    (aLocalClipRect.Top() - rOffset.getY())/pScaling->getY(),
+                                    (aLocalClipRect.Right() - rOffset.getX())/pScaling->getX(),
+                                    (aLocalClipRect.Bottom() - rOffset.getY())/pScaling->getY() ) ) ) );
+                }
+                else
+                {
+                    // offset only - do it on the fly, have to convert
+                    // to float anyway.
+                    o_rRenderState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
+                        rCanvas->getUNOCanvas()->getDevice(),
+                        ::basegfx::B2DPolyPolygon(
+                            ::basegfx::utils::createPolygonFromRect(
+                                ::basegfx::B2DRectangle( aLocalClipRect.Left() - rOffset.getX(),
+                                                         aLocalClipRect.Top() - rOffset.getY(),
+                                                         aLocalClipRect.Right() - rOffset.getX(),
+                                                         aLocalClipRect.Bottom() - rOffset.getY() ) ) ) );
+                }
+
+                return true;
+            }
+
+            // empty clip, nothing to do
+            return false;
+        }
+
+        // create overline/underline/strikeout line info struct
+        TextLineInfo createTextLineInfo( const ::VirtualDevice&                     rVDev,
+                                         const ::cppcanvas::internal::OutDevState&  rState )
+        {
+            const bool bOldMode( rVDev.IsMapModeEnabled() );
+
+            // #i68512# Force metric regeneration with mapmode enabled
+            // (prolly OutDev bug)
+            rVDev.GetFontMetric();
+
+            // will restore map mode below
+            const_cast< ::VirtualDevice& >(rVDev).EnableMapMode( false );
+
+            const ::FontMetric aMetric = rVDev.GetFontMetric();
+
+            TextLineInfo aTextInfo(
+                (aMetric.GetDescent() + 2) / 4.0,
+                ((aMetric.GetInternalLeading() + 1.5) / 3.0),
+                (aMetric.GetInternalLeading() / 2.0) - aMetric.GetAscent(),
+                aMetric.GetDescent() / 2.0,
+                (aMetric.GetInternalLeading() - aMetric.GetAscent()) / 3.0,
+                rState.textOverlineStyle,
+                rState.textUnderlineStyle,
+                rState.textStrikeoutStyle );
+
+            const_cast< ::VirtualDevice& >(rVDev).EnableMapMode( bOldMode );
+
+            return aTextInfo;
+        }
+
+        namespace
+        {
+            void appendWaveline( ::basegfx::B2DPolyPolygon& o_rPoly,
+                             const ::basegfx::B2DPoint& rStartPos,
+                             const double               nStartOffset,
+                             const double               nWidth,
+                             const double               nHeight,
+                             sal_Int8                   nLineStyle)
+            {
+                const double x(rStartPos.getX());
+                const double y(rStartPos.getY() + nStartOffset + nHeight);
+                double nWaveWidth = nHeight * 10.6 * 0.25;
+                // Offset for the double line.
+                double nOffset = 0.0;
+
+                if (nLineStyle == LINESTYLE_DOUBLEWAVE)
+                    nOffset = -nHeight * 0.5;
+                else
+                    nWaveWidth *= 2.0;
+
+                basegfx::B2DPolygon aLine;
+                aLine.append(basegfx::B2DPoint(x, y + nOffset));
+                aLine.append(basegfx::B2DPoint(x + nWidth, y + nOffset));
+
+                o_rPoly.append(::basegfx::utils::createWaveline(aLine, nWaveWidth, nWaveWidth * 0.5));
+
+                if (nLineStyle == LINESTYLE_DOUBLEWAVE)
+                {
+                    nOffset = nHeight * 1.2;
+
+                    basegfx::B2DPolygon aLine2;
+                    aLine2.append(basegfx::B2DPoint(x, y + nOffset));
+                    aLine2.append(basegfx::B2DPoint(x + nWidth, y + nOffset));
+                    o_rPoly.append(::basegfx::utils::createWaveline(aLine2, nWaveWidth, nWaveWidth * 0.5));
+                }
+            }
+
+            void appendRect( ::basegfx::B2DPolyPolygon& o_rPoly,
+                             const ::basegfx::B2DPoint& rStartPos,
+                             const double               nX1,
+                             const double               nY1,
+                             const double               nX2,
+                             const double               nY2 )
+            {
+                const double x( rStartPos.getX() );
+                const double y( rStartPos.getY() );
+
+                o_rPoly.append(
+                    ::basegfx::utils::createPolygonFromRect(
+                        ::basegfx::B2DRectangle( x + nX1, y + nY1, x + nX2, y + nY2 ) ) );
+            }
+
+            void appendRect( ::basegfx::B2DPolyPolygon& o_rPoly,
+                             const double               nX1,
+                             const double               nY1,
+                             const double               nX2,
+                             const double               nY2 )
+            {
+                o_rPoly.append(
+                    ::basegfx::utils::createPolygonFromRect(
+                        ::basegfx::B2DRectangle( nX1, nY1, nX2, nY2 ) ) );
+            }
+
+            bool appendDashes( ::basegfx::B2DPolyPolygon&   o_rPoly,
+                               const double                 nX,
+                               double                       nY,
+                               const double                 nLineWidth,
+                               double                       nLineHeight,
+                               sal_Int8                     nLineStyle,
+                               bool                         bIsOverline)
+            {
+                static const int aDottedArray[]     = { 1, 1, 0};               // DOTTED LINE
+                static const int aDotDashArray[]    = { 1, 1, 4, 1, 0};         // DASHDOT
+                static const int aDashDotDotArray[] = { 1, 1, 1, 1, 4, 1, 0};   // DASHDOTDOT
+                static const int aDashedArray[]     = { 5, 2, 0};               // DASHED LINE
+                static const int aLongDashArray[]   = { 7, 2, 0};               // LONGDASH
+                const int *pArray = nullptr;
+                bool bIsBold = false;
+
+                switch(nLineStyle)
+                {
+                    case LINESTYLE_BOLDDOTTED:
+                        bIsBold = true;
+                        [[fallthrough]];
+                    case LINESTYLE_DOTTED:
+                        pArray = aDottedArray;
+                    break;
+
+                    case LINESTYLE_BOLDDASH:
+                        bIsBold = true;
+                        [[fallthrough]];
+                    case LINESTYLE_DASH:
+                        pArray = aDashedArray;
+                    break;
+
+                    case LINESTYLE_BOLDLONGDASH:
+                        bIsBold = true;
+                        [[fallthrough]];
+                    case LINESTYLE_LONGDASH:
+                        pArray = aLongDashArray;
+                    break;
+
+                    case LINESTYLE_BOLDDASHDOT:
+                        bIsBold = true;
+                        [[fallthrough]];
+                    case LINESTYLE_DASHDOT:
+                        pArray = aDotDashArray;
+                    break;
+                    case LINESTYLE_BOLDDASHDOTDOT:
+                        bIsBold = true;
+                        [[fallthrough]];
+                    case LINESTYLE_DASHDOTDOT:
+                        pArray = aDashDotDotArray;
+                    break;
+                }
+
+                if (!pArray)
+                    return false;
+
+                if (bIsBold)
+                {
+                    if (bIsOverline)
+                        nY -= nLineHeight;
+
+                    nLineHeight *= 2;
+                }
+
+                const double nEnd = nX + nLineWidth;
+                sal_Int32 nIndex = 0;
+                bool bAppend = true;
+                double nX1 = nX;
+
+                while(nX1 < nEnd)
+                {
+                    if (pArray[nIndex] == 0)
+                        nIndex = 0;
+
+                    const double nX2 = std::min(nEnd, nX1 + pArray[nIndex] * nLineHeight);
+
+                    if (bAppend)
+                        appendRect(o_rPoly, nX1, nY, nX2, nY + nLineHeight);
+
+                    nX1 = nX2;
+
+                    ++nIndex;
+
+                    bAppend = !bAppend;
+                }
+                return true;
+            }
+
+            // create line actions for text such as underline and
+            // strikeout
+            void createOverlinePolyPolygon(::basegfx::B2DPolyPolygon& rTextLinesPolyPoly,
+                                            const ::basegfx::B2DPoint& rStartPos,
+                                            const double&              rLineWidth,
+                                            const TextLineInfo&        rTextLineInfo)
+            {
+                switch( rTextLineInfo.mnOverlineStyle )
+                {
+                    case LINESTYLE_NONE:          // nothing to do
+                    case LINESTYLE_DONTKNOW:
+                        break;
+
+                    case LINESTYLE_DOUBLEWAVE:
+                    case LINESTYLE_SMALLWAVE:
+                    case LINESTYLE_BOLDWAVE:
+                    case LINESTYLE_WAVE:
+                        appendWaveline(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            rTextLineInfo.mnOverlineOffset,
+                            rLineWidth,
+                            rTextLineInfo.mnOverlineHeight,
+                            rTextLineInfo.mnOverlineStyle);
+
+                        break;
+                    case LINESTYLE_SINGLE:
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnOverlineOffset,
+                            rLineWidth,
+                            rTextLineInfo.mnOverlineOffset + rTextLineInfo.mnOverlineHeight );
+                        break;
+                    case LINESTYLE_BOLD:
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnOverlineOffset - rTextLineInfo.mnOverlineHeight,
+                            rLineWidth,
+                            rTextLineInfo.mnOverlineOffset + rTextLineInfo.mnOverlineHeight );
+                        break;
+
+                    case LINESTYLE_DOUBLE:
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnOverlineOffset - rTextLineInfo.mnOverlineHeight * 2.0 ,
+                            rLineWidth,
+                            rTextLineInfo.mnOverlineOffset - rTextLineInfo.mnOverlineHeight );
+
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnOverlineOffset + rTextLineInfo.mnOverlineHeight,
+                            rLineWidth,
+                            rTextLineInfo.mnOverlineOffset + rTextLineInfo.mnOverlineHeight * 2.0 );
+                        break;
+
+                    default:
+                        if (!appendDashes(
+                            rTextLinesPolyPoly,
+                            rStartPos.getX(),
+                            rStartPos.getY() + rTextLineInfo.mnOverlineOffset,
+                            rLineWidth,
+                            rTextLineInfo.mnOverlineHeight,
+                            rTextLineInfo.mnOverlineStyle,
+                            true))
+                        {
+                            ENSURE_OR_THROW( false,
+                                          "::cppcanvas::internal::createTextLinesPolyPolygon(): Unexpected overline case" );
+                        }
+                }
+            }
+
+            void createUnderlinePolyPolygon(::basegfx::B2DPolyPolygon& rTextLinesPolyPoly,
+                                            const ::basegfx::B2DPoint& rStartPos,
+                                            const double&              rLineWidth,
+                                            const TextLineInfo&        rTextLineInfo )
+            {
+
+                switch( rTextLineInfo.mnUnderlineStyle )
+                {
+                    case LINESTYLE_NONE:          // nothing to do
+                    case LINESTYLE_DONTKNOW:
+                        break;
+
+                    case LINESTYLE_DOUBLEWAVE:
+                    case LINESTYLE_SMALLWAVE:
+                    case LINESTYLE_BOLDWAVE:
+                    case LINESTYLE_WAVE:
+                        appendWaveline(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            rTextLineInfo.mnUnderlineOffset,
+                            rLineWidth,
+                            rTextLineInfo.mnLineHeight,
+                            rTextLineInfo.mnUnderlineStyle);
+                        break;
+                    case LINESTYLE_SINGLE:
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnUnderlineOffset,
+                            rLineWidth,
+                            rTextLineInfo.mnUnderlineOffset + rTextLineInfo.mnLineHeight );
+                        break;
+
+                    case LINESTYLE_BOLD:
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnUnderlineOffset,
+                            rLineWidth,
+                            rTextLineInfo.mnUnderlineOffset + 2*rTextLineInfo.mnLineHeight );
+                        break;
+
+                    case LINESTYLE_DOUBLE:
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnUnderlineOffset - rTextLineInfo.mnLineHeight,
+                            rLineWidth,
+                            rTextLineInfo.mnUnderlineOffset );
+
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnUnderlineOffset + 2*rTextLineInfo.mnLineHeight,
+                            rLineWidth,
+                            rTextLineInfo.mnUnderlineOffset + 3*rTextLineInfo.mnLineHeight );
+                        break;
+
+                    default:
+                        if (!appendDashes(
+                            rTextLinesPolyPoly,
+                            rStartPos.getX(),
+                            rStartPos.getY() + rTextLineInfo.mnUnderlineOffset,
+                            rLineWidth,
+                            rTextLineInfo.mnLineHeight,
+                            rTextLineInfo.mnUnderlineStyle,
+                            false))
+                        {
+                            ENSURE_OR_THROW( false,
+                                          "::cppcanvas::internal::createTextLinesPolyPolygon(): Unexpected underline case" );
+                        }
+                }
+            }
+
+            void createStrikeoutPolyPolygon(::basegfx::B2DPolyPolygon& rTextLinesPolyPoly,
+                                            const ::basegfx::B2DPoint& rStartPos,
+                                            const double&              rLineWidth,
+                                            const TextLineInfo&        rTextLineInfo)
+            {
+                switch( rTextLineInfo.mnStrikeoutStyle )
+                {
+                    case STRIKEOUT_NONE:    // nothing to do
+                    case STRIKEOUT_DONTKNOW:
+                        break;
+
+                    case STRIKEOUT_SLASH:   // TODO(Q1): we should handle this in the text layer
+                    case STRIKEOUT_X:
+                        break;
+
+                    case STRIKEOUT_SINGLE:
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnStrikeoutOffset,
+                            rLineWidth,
+                            rTextLineInfo.mnStrikeoutOffset + rTextLineInfo.mnLineHeight );
+                        break;
+
+                    case STRIKEOUT_BOLD:
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnStrikeoutOffset,
+                            rLineWidth,
+                            rTextLineInfo.mnStrikeoutOffset + 2*rTextLineInfo.mnLineHeight );
+                        break;
+
+                    case STRIKEOUT_DOUBLE:
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnStrikeoutOffset - rTextLineInfo.mnLineHeight,
+                            rLineWidth,
+                            rTextLineInfo.mnStrikeoutOffset );
+
+                        appendRect(
+                            rTextLinesPolyPoly,
+                            rStartPos,
+                            0,
+                            rTextLineInfo.mnStrikeoutOffset + 2*rTextLineInfo.mnLineHeight,
+                            rLineWidth,
+                            rTextLineInfo.mnStrikeoutOffset + 3*rTextLineInfo.mnLineHeight );
+                        break;
+
+                    default:
+                        ENSURE_OR_THROW( false,
+                                          "::cppcanvas::internal::createTextLinesPolyPolygon(): Unexpected strikeout case" );
+                }
+            }
+        }
+
+        ::basegfx::B2DPolyPolygon createTextLinesPolyPolygon( const ::basegfx::B2DPoint& rStartPos,
+                                                              const double&              rLineWidth,
+                                                              const TextLineInfo&        rTextLineInfo )
+        {
+            // fill the polypolygon with all text lines
+            ::basegfx::B2DPolyPolygon aTextLinesPolyPoly;
+
+            createOverlinePolyPolygon(aTextLinesPolyPoly, rStartPos, rLineWidth, rTextLineInfo);
+            createUnderlinePolyPolygon(aTextLinesPolyPoly, rStartPos, rLineWidth, rTextLineInfo);
+            createStrikeoutPolyPolygon(aTextLinesPolyPoly, rStartPos, rLineWidth, rTextLineInfo);
+            return aTextLinesPolyPoly;
+        }
+
+        ::basegfx::B2DRange calcDevicePixelBounds( const ::basegfx::B2DRange&       rBounds,
+                                                   const rendering::ViewState&      viewState,
+                                                   const rendering::RenderState&    renderState )
+        {
+            ::basegfx::B2DHomMatrix aTransform;
+            ::canvas::tools::mergeViewAndRenderTransform( aTransform,
+                                                          viewState,
+                                                          renderState );
+
+            ::basegfx::B2DRange aTransformedBounds;
+            return ::canvas::tools::calcTransformedRectBounds( aTransformedBounds,
+                                                               rBounds,
+                                                               aTransform );
+        }
+
+        // create line actions for text such as underline and
+        // strikeout
+        ::basegfx::B2DPolyPolygon createTextLinesPolyPolygon( const double&         rStartOffset,
+                                                              const double&         rLineWidth,
+                                                              const TextLineInfo&   rTextLineInfo )
+        {
+            return createTextLinesPolyPolygon(
+                ::basegfx::B2DPoint( rStartOffset,
+                                     0.0 ),
+                rLineWidth,
+                rTextLineInfo );
+        }
+
+        void createTextLinesPolyPolygon( const double&              rStartOffset,
+                                         const double&              rLineWidth,
+                                         const TextLineInfo&        rTextLineInfo,
+                                         ::basegfx::B2DPolyPolygon& rOverlinePolyPoly,
+                                         ::basegfx::B2DPolyPolygon& rUnderlinePolyPoly,
+                                         ::basegfx::B2DPolyPolygon& rStrikeoutPolyPoly )
+        {
+            ::basegfx::B2DPoint aStartPos(rStartOffset, 0.0);
+
+            createOverlinePolyPolygon(rOverlinePolyPoly, aStartPos, rLineWidth, rTextLineInfo);
+            createUnderlinePolyPolygon(rUnderlinePolyPoly, aStartPos, rLineWidth, rTextLineInfo);
+            createStrikeoutPolyPolygon(rStrikeoutPolyPoly, aStartPos, rLineWidth, rTextLineInfo);
+        }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */