/* -*- 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 <cmath>
#include <comphelper/string.hxx>
#include "vclprocessor2d.hxx"
#include <drawinglayer/primitive2d/textprimitive2d.hxx>
#include <drawinglayer/primitive2d/textdecoratedprimitive2d.hxx>
#include <tools/debug.hxx>
#include <vcl/outdev.hxx>
#include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
#include <drawinglayer/primitive2d/bitmapprimitive2d.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <drawinglayer/attribute/sdrfillgraphicattribute.hxx>
#include <drawinglayer/primitive2d/fillgraphicprimitive2d.hxx>
#include <drawinglayer/primitive2d/polypolygonprimitive2d.hxx>
#include <drawinglayer/primitive2d/metafileprimitive2d.hxx>
#include <drawinglayer/primitive2d/maskprimitive2d.hxx>
#include <basegfx/polygon/b2dpolypolygontools.hxx>
#include "vclhelperbufferdevice.hxx"
#include <drawinglayer/primitive2d/modifiedcolorprimitive2d.hxx>
#include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx>
#include <drawinglayer/primitive2d/transparenceprimitive2d.hxx>
#include <drawinglayer/primitive2d/transformprimitive2d.hxx>
#include <drawinglayer/primitive2d/markerarrayprimitive2d.hxx>
#include <drawinglayer/primitive2d/pointarrayprimitive2d.hxx>
#include <drawinglayer/primitive2d/pagepreviewprimitive2d.hxx>
#include <tools/diagnose_ex.h>
#include <rtl/ustrbuf.hxx>
#include <sal/log.hxx>
#include <vcl/metric.hxx>
#include <drawinglayer/primitive2d/textenumsprimitive2d.hxx>
#include <drawinglayer/primitive2d/epsprimitive2d.hxx>
#include <drawinglayer/primitive2d/svggradientprimitive2d.hxx>
#include <basegfx/color/bcolor.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include <vcl/graph.hxx>

#include "getdigitlanguage.hxx"

// control support

#include <drawinglayer/primitive2d/controlprimitive2d.hxx>
#include <drawinglayer/primitive2d/textlayoutdevice.hxx>

#include <basegfx/polygon/b2dpolygonclipper.hxx>
#include <basegfx/polygon/b2dtrapezoid.hxx>

// for support of Title/Description in all apps when embedding pictures
#include <drawinglayer/primitive2d/objectinfoprimitive2d.hxx>

using namespace com::sun::star;

namespace
{
    sal_uInt32 calculateStepsForSvgGradient(const basegfx::BColor& rColorA, const basegfx::BColor& rColorB, double fDelta, double fDiscreteUnit)
    {
        // use color distance, assume to do every color step
        sal_uInt32 nSteps(basegfx::fround(rColorA.getDistance(rColorB) * 255.0));

        if(nSteps)
        {
            // calc discrete length to change color each disctete unit (pixel)
            const sal_uInt32 nDistSteps(basegfx::fround(fDelta / fDiscreteUnit));

            nSteps = std::min(nSteps, nDistSteps);
        }

        // reduce quality to 3 discrete units or every 3rd color step for rendering
        nSteps /= 2;

        // roughly cut when too big or too small (not full quality, reduce complexity)
        nSteps = std::min(nSteps, sal_uInt32(255));
        nSteps = std::max(nSteps, sal_uInt32(1));

        return nSteps;
    }
}

namespace drawinglayer
{
    namespace processor2d
    {
        // rendering support

        // directdraw of text simple portion or decorated portion primitive. When decorated, all the extra
        // information is translated to VCL parameters and set at the font.
        // Acceptance is restricted to no shearing and positive scaling in X and Y (no font mirroring
        // for VCL)
        void VclProcessor2D::RenderTextSimpleOrDecoratedPortionPrimitive2D(const primitive2d::TextSimplePortionPrimitive2D& rTextCandidate)
        {
            // decompose matrix to have position and size of text
            basegfx::B2DHomMatrix aLocalTransform(maCurrentTransformation * rTextCandidate.getTextTransform());
            basegfx::B2DVector aFontScaling, aTranslate;
            double fRotate, fShearX;
            aLocalTransform.decompose(aFontScaling, aTranslate, fRotate, fShearX);
            bool bPrimitiveAccepted(false);

            // tdf#95581: Assume tiny shears are rounding artefacts or whatever and can be ignored,
            // especially if the effect is less than a pixel.
            if(std::abs(aFontScaling.getY() * fShearX) < 1)
            {
                if(basegfx::fTools::less(aFontScaling.getX(), 0.0) && basegfx::fTools::less(aFontScaling.getY(), 0.0))
                {
                    // handle special case: If scale is negative in (x,y) (3rd quadrant), it can
                    // be expressed as rotation by PI. Use this since the Font rendering will not
                    // apply the negative scales in any form
                    aFontScaling = basegfx::absolute(aFontScaling);
                    fRotate += F_PI;
                }

                if(basegfx::fTools::more(aFontScaling.getX(), 0.0) && basegfx::fTools::more(aFontScaling.getY(), 0.0))
                {
                    // Get the VCL font (use FontHeight as FontWidth)
                    vcl::Font aFont(primitive2d::getVclFontFromFontAttribute(
                        rTextCandidate.getFontAttribute(),
                        aFontScaling.getX(),
                        aFontScaling.getY(),
                        fRotate,
                        rTextCandidate.getLocale()));

                    // set FillColor Attribute
                    const Color aFillColor( rTextCandidate.getTextFillColor() );
                    if( aFillColor != COL_TRANSPARENT )
                    {
                        aFont.SetFillColor(aFillColor);
                        aFont.SetTransparent(false);
                    }

                    // Don't draw fonts without height
                    if( aFont.GetFontHeight() <= 0 )
                        return;

                    // handle additional font attributes
                    const primitive2d::TextDecoratedPortionPrimitive2D* pTCPP =
                        dynamic_cast<const primitive2d::TextDecoratedPortionPrimitive2D*>( &rTextCandidate );

                    if( pTCPP != nullptr )
                    {

                        // set the color of text decorations
                        const basegfx::BColor aTextlineColor = maBColorModifierStack.getModifiedColor(pTCPP->getTextlineColor());
                        mpOutputDevice->SetTextLineColor( Color(aTextlineColor) );

                        // set Overline attribute
                        const FontLineStyle eFontOverline(primitive2d::mapTextLineToFontLineStyle( pTCPP->getFontOverline() ));
                        if( eFontOverline != LINESTYLE_NONE )
                        {
                            aFont.SetOverline( eFontOverline );
                            const basegfx::BColor aOverlineColor = maBColorModifierStack.getModifiedColor(pTCPP->getOverlineColor());
                            mpOutputDevice->SetOverlineColor( Color(aOverlineColor) );
                            if( pTCPP->getWordLineMode() )
                                aFont.SetWordLineMode( true );
                        }

                        // set Underline attribute
                        const FontLineStyle eFontLineStyle(primitive2d::mapTextLineToFontLineStyle( pTCPP->getFontUnderline() ));
                        if( eFontLineStyle != LINESTYLE_NONE )
                        {
                            aFont.SetUnderline( eFontLineStyle );
                            if( pTCPP->getWordLineMode() )
                                aFont.SetWordLineMode( true );
                        }

                        // set Strikeout attribute
                        const FontStrikeout eFontStrikeout(primitive2d::mapTextStrikeoutToFontStrikeout(pTCPP->getTextStrikeout()));

                        if( eFontStrikeout != STRIKEOUT_NONE )
                            aFont.SetStrikeout( eFontStrikeout );


                        // set EmphasisMark attribute
                        FontEmphasisMark eFontEmphasisMark = FontEmphasisMark::NONE;
                        switch( pTCPP->getTextEmphasisMark() )
                        {
                            default:
                                SAL_WARN("drawinglayer", "Unknown EmphasisMark style " << pTCPP->getTextEmphasisMark() );
                                [[fallthrough]];
                            case primitive2d::TEXT_FONT_EMPHASIS_MARK_NONE:   eFontEmphasisMark = FontEmphasisMark::NONE; break;
                            case primitive2d::TEXT_FONT_EMPHASIS_MARK_DOT:    eFontEmphasisMark = FontEmphasisMark::Dot; break;
                            case primitive2d::TEXT_FONT_EMPHASIS_MARK_CIRCLE: eFontEmphasisMark = FontEmphasisMark::Circle; break;
                            case primitive2d::TEXT_FONT_EMPHASIS_MARK_DISC:   eFontEmphasisMark = FontEmphasisMark::Disc; break;
                            case primitive2d::TEXT_FONT_EMPHASIS_MARK_ACCENT: eFontEmphasisMark = FontEmphasisMark::Accent; break;
                        }

                        if( eFontEmphasisMark != FontEmphasisMark::NONE )
                        {
                            DBG_ASSERT( (pTCPP->getEmphasisMarkAbove() != pTCPP->getEmphasisMarkBelow()),
                                "DrawingLayer: Bad EmphasisMark position!" );
                            if( pTCPP->getEmphasisMarkAbove() )
                                eFontEmphasisMark |= FontEmphasisMark::PosAbove;
                            else
                                eFontEmphasisMark |= FontEmphasisMark::PosBelow;
                            aFont.SetEmphasisMark( eFontEmphasisMark );
                        }

                        // set Relief attribute
                        FontRelief eFontRelief = FontRelief::NONE;
                        switch( pTCPP->getTextRelief() )
                        {
                            default:
                                SAL_WARN( "drawinglayer", "Unknown Relief style " << pTCPP->getTextRelief() );
                                [[fallthrough]];
                            case primitive2d::TEXT_RELIEF_NONE:     eFontRelief = FontRelief::NONE; break;
                            case primitive2d::TEXT_RELIEF_EMBOSSED: eFontRelief = FontRelief::Embossed; break;
                            case primitive2d::TEXT_RELIEF_ENGRAVED: eFontRelief = FontRelief::Engraved; break;
                        }

                        if( eFontRelief != FontRelief::NONE )
                            aFont.SetRelief( eFontRelief );

                        // set Shadow attribute
                        if( pTCPP->getShadow() )
                            aFont.SetShadow( true );
                    }

                    // create transformed integer DXArray in view coordinate system
                    std::vector< long > aTransformedDXArray;

                    if(!rTextCandidate.getDXArray().empty())
                    {
                        aTransformedDXArray.reserve(rTextCandidate.getDXArray().size());
                        const basegfx::B2DVector aPixelVector(maCurrentTransformation * basegfx::B2DVector(1.0, 0.0));
                        const double fPixelVectorFactor(aPixelVector.getLength());

                        for (auto const& elem : rTextCandidate.getDXArray())
                        {
                            aTransformedDXArray.push_back(basegfx::fround(elem * fPixelVectorFactor));
                        }
                    }

                    // set parameters and paint text snippet
                    const basegfx::BColor aRGBFontColor(maBColorModifierStack.getModifiedColor(rTextCandidate.getFontColor()));
                    const basegfx::B2DPoint aPoint(aLocalTransform * basegfx::B2DPoint(0.0, 0.0));
                    const Point aStartPoint(basegfx::fround(aPoint.getX()), basegfx::fround(aPoint.getY()));
                    const ComplexTextLayoutFlags nOldLayoutMode(mpOutputDevice->GetLayoutMode());

                    if(rTextCandidate.getFontAttribute().getRTL())
                    {
                        ComplexTextLayoutFlags nRTLLayoutMode(nOldLayoutMode & ~ComplexTextLayoutFlags::BiDiStrong);
                        nRTLLayoutMode |= ComplexTextLayoutFlags::BiDiRtl|ComplexTextLayoutFlags::TextOriginLeft;
                        mpOutputDevice->SetLayoutMode(nRTLLayoutMode);
                    }

                    mpOutputDevice->SetFont(aFont);
                    mpOutputDevice->SetTextColor(Color(aRGBFontColor));

                    OUString aText( rTextCandidate.getText() );
                    sal_Int32 nPos = rTextCandidate.getTextPosition();
                    sal_Int32 nLen = rTextCandidate.getTextLength();

                    long* pDXArray = !aTransformedDXArray.empty() ? &(aTransformedDXArray[0]) : nullptr ;

                    if ( rTextCandidate.isFilled() )
                    {
                        basegfx::B2DVector aOldFontScaling, aOldTranslate;
                        double fOldRotate, fOldShearX;
                        rTextCandidate.getTextTransform().decompose(aOldFontScaling, aOldTranslate, fOldRotate, fOldShearX);

                        long nWidthToFill = static_cast<long>(rTextCandidate.getWidthToFill( ) * aFontScaling.getX() / aOldFontScaling.getX());

                        long nWidth = mpOutputDevice->GetTextArray( rTextCandidate.getText(), pDXArray, 0, 1 );
                        long nChars = 2;
                        if ( nWidth )
                            nChars = nWidthToFill / nWidth;

                        OUStringBuffer aFilled;
                        comphelper::string::padToLength(aFilled, nChars, aText[0]);
                        aText = aFilled.makeStringAndClear();
                        nPos = 0;
                        nLen = nChars;
                    }

                    if(!aTransformedDXArray.empty())
                    {
                        mpOutputDevice->DrawTextArray(
                            aStartPoint,
                            aText,
                            pDXArray,
                            nPos,
                            nLen);
                    }
                    else
                    {
                        mpOutputDevice->DrawText(
                            aStartPoint,
                            aText,
                            nPos,
                            nLen);
                    }

                    if(rTextCandidate.getFontAttribute().getRTL())
                    {
                        mpOutputDevice->SetLayoutMode(nOldLayoutMode);
                    }

                    bPrimitiveAccepted = true;
                }
            }

            if(!bPrimitiveAccepted)
            {
                // let break down
                process(rTextCandidate);
            }
        }

        // direct draw of hairline
        void VclProcessor2D::RenderPolygonHairlinePrimitive2D(const primitive2d::PolygonHairlinePrimitive2D& rPolygonCandidate, bool bPixelBased)
        {
            const basegfx::BColor aHairlineColor(maBColorModifierStack.getModifiedColor(rPolygonCandidate.getBColor()));
            mpOutputDevice->SetLineColor(Color(aHairlineColor));
            mpOutputDevice->SetFillColor();

            basegfx::B2DPolygon aLocalPolygon(rPolygonCandidate.getB2DPolygon());
            aLocalPolygon.transform(maCurrentTransformation);

            if(bPixelBased && getOptionsDrawinglayer().IsAntiAliasing() && getOptionsDrawinglayer().IsSnapHorVerLinesToDiscrete())
            {
                // #i98289#
                // when a Hairline is painted and AntiAliasing is on the option SnapHorVerLinesToDiscrete
                // allows to suppress AntiAliasing for pure horizontal or vertical lines. This is done since
                // not-AntiAliased such lines look more pleasing to the eye (e.g. 2D chart content). This
                // NEEDS to be done in discrete coordinates, so only useful for pixel based rendering.
                aLocalPolygon = basegfx::utils::snapPointsOfHorizontalOrVerticalEdges(aLocalPolygon);
            }

            mpOutputDevice->DrawPolyLine(aLocalPolygon, 0.0);
        }

        // direct draw of transformed BitmapEx primitive
        void VclProcessor2D::RenderBitmapPrimitive2D(const primitive2d::BitmapPrimitive2D& rBitmapCandidate)
        {
            BitmapEx aBitmapEx(rBitmapCandidate.getBitmapEx());
            const basegfx::B2DHomMatrix aLocalTransform(maCurrentTransformation * rBitmapCandidate.getTransform());

            if(maBColorModifierStack.count())
            {
                aBitmapEx = aBitmapEx.ModifyBitmapEx(maBColorModifierStack);

                if(aBitmapEx.IsEmpty())
                {
                    // color gets completely replaced, get it
                    const basegfx::BColor aModifiedColor(maBColorModifierStack.getModifiedColor(basegfx::BColor()));
                    basegfx::B2DPolygon aPolygon(basegfx::utils::createUnitPolygon());
                    aPolygon.transform(aLocalTransform);

                    mpOutputDevice->SetFillColor(Color(aModifiedColor));
                    mpOutputDevice->SetLineColor();
                    mpOutputDevice->DrawPolygon(aPolygon);

                    return;
                }
            }

            // #122923# do no longer add Alpha channel here; the right place to do this is when really
            // the own transformer is used (see OutputDevice::DrawTransformedBitmapEx).

            // draw using OutputDevice'sDrawTransformedBitmapEx
            mpOutputDevice->DrawTransformedBitmapEx(aLocalTransform, aBitmapEx);
        }

        void VclProcessor2D::RenderFillGraphicPrimitive2D(const primitive2d::FillGraphicPrimitive2D& rFillBitmapCandidate)
        {
            const attribute::FillGraphicAttribute& rFillGraphicAttribute(rFillBitmapCandidate.getFillGraphic());
            bool bPrimitiveAccepted(false);

            // #121194# when tiling is used and content is bitmap-based, do direct tiling in the
            // renderer on pixel base to ensure tight fitting. Do not do this when
            // the fill is rotated or sheared.
            if(rFillGraphicAttribute.getTiling())
            {
                // content is bitmap(ex)
                //
                // for Vector Graphic Data (SVG, EMF+) support, force decomposition when present. This will lead to use
                // the primitive representation of the vector data directly.
                //
                // when graphic is animated, force decomposition to use the correct graphic, else
                // fill style will not be animated
                if(GraphicType::Bitmap == rFillGraphicAttribute.getGraphic().GetType()
                    && !rFillGraphicAttribute.getGraphic().getVectorGraphicData().get()
                    && !rFillGraphicAttribute.getGraphic().IsAnimated())
                {
                    // decompose matrix to check for shear, rotate and mirroring
                    basegfx::B2DHomMatrix aLocalTransform(maCurrentTransformation * rFillBitmapCandidate.getTransformation());
                    basegfx::B2DVector aScale, aTranslate;
                    double fRotate, fShearX;
                    aLocalTransform.decompose(aScale, aTranslate, fRotate, fShearX);

                    // when nopt rotated/sheared
                    if(basegfx::fTools::equalZero(fRotate) && basegfx::fTools::equalZero(fShearX))
                    {
                        // no shear or rotate, draw direct in pixel coordinates
                        bPrimitiveAccepted = true;

                        // transform object range to device coordinates (pixels). Use
                        // the device transformation for better accuracy
                        basegfx::B2DRange aObjectRange(aTranslate, aTranslate + aScale);
                        aObjectRange.transform(mpOutputDevice->GetViewTransformation());

                        // extract discrete size of object
                        const sal_Int32 nOWidth(basegfx::fround(aObjectRange.getWidth()));
                        const sal_Int32 nOHeight(basegfx::fround(aObjectRange.getHeight()));

                        // only do something when object has a size in discrete units
                        if(nOWidth > 0 && nOHeight > 0)
                        {
                            // transform graphic range to device coordinates (pixels). Use
                            // the device transformation for better accuracy
                            basegfx::B2DRange aGraphicRange(rFillGraphicAttribute.getGraphicRange());
                            aGraphicRange.transform(mpOutputDevice->GetViewTransformation() * aLocalTransform);

                            // extract discrete size of graphic
                            // caution: when getting to zero, nothing would be painted; thus, do not allow this
                            const sal_Int32 nBWidth(std::max(sal_Int32(1), basegfx::fround(aGraphicRange.getWidth())));
                            const sal_Int32 nBHeight(std::max(sal_Int32(1), basegfx::fround(aGraphicRange.getHeight())));

                            // only do something when bitmap fill has a size in discrete units
                            if(nBWidth > 0 && nBHeight > 0)
                            {
                                // nBWidth, nBHeight is the pixel size of the needed bitmap. To not need to scale it
                                // in vcl many times, create a size-optimized version
                                const Size aNeededBitmapSizePixel(nBWidth, nBHeight);
                                BitmapEx aBitmapEx(rFillGraphicAttribute.getGraphic().GetBitmapEx());
                                const bool bPreScaled(nBWidth * nBHeight < (250 * 250));

                                // ... but only up to a maximum size, else it gets too expensive
                                if(bPreScaled)
                                {
                                    // if color depth is below 24bit, expand before scaling for better quality.
                                    // This is even needed for low colors, else the scale will produce
                                    // a bitmap in gray or Black/White (!)
                                    if(aBitmapEx.GetBitCount() < 24)
                                    {
                                        aBitmapEx.Convert(BmpConversion::N24Bit);
                                    }

                                    aBitmapEx.Scale(aNeededBitmapSizePixel, BmpScaleFlag::Interpolate);
                                }

                                bool bPainted(false);

                                if(maBColorModifierStack.count())
                                {
                                    // when color modifier, apply to bitmap
                                    aBitmapEx = aBitmapEx.ModifyBitmapEx(maBColorModifierStack);

                                    // impModifyBitmapEx uses empty bitmap as sign to return that
                                    // the content will be completely replaced to mono color, use shortcut
                                    if(aBitmapEx.IsEmpty())
                                    {
                                        // color gets completely replaced, get it
                                        const basegfx::BColor aModifiedColor(maBColorModifierStack.getModifiedColor(basegfx::BColor()));
                                        basegfx::B2DPolygon aPolygon(basegfx::utils::createUnitPolygon());
                                        aPolygon.transform(aLocalTransform);

                                        mpOutputDevice->SetFillColor(Color(aModifiedColor));
                                        mpOutputDevice->SetLineColor();
                                        mpOutputDevice->DrawPolygon(aPolygon);

                                        bPainted = true;
                                    }
                                }

                                if(!bPainted)
                                {
                                    sal_Int32 nBLeft(basegfx::fround(aGraphicRange.getMinX()));
                                    sal_Int32 nBTop(basegfx::fround(aGraphicRange.getMinY()));
                                    const sal_Int32 nOLeft(basegfx::fround(aObjectRange.getMinX()));
                                    const sal_Int32 nOTop(basegfx::fround(aObjectRange.getMinY()));
                                    sal_Int32 nPosX(0);
                                    sal_Int32 nPosY(0);

                                    if(nBLeft > nOLeft)
                                    {
                                        const sal_Int32 nDiff((nBLeft / nBWidth) + 1);

                                        nPosX -= nDiff;
                                        nBLeft -= nDiff * nBWidth;
                                    }

                                    if(nBLeft + nBWidth <= nOLeft)
                                    {
                                        const sal_Int32 nDiff(-nBLeft / nBWidth);

                                        nPosX += nDiff;
                                        nBLeft += nDiff * nBWidth;
                                    }

                                    if(nBTop > nOTop)
                                    {
                                        const sal_Int32 nDiff((nBTop / nBHeight) + 1);

                                        nPosY -= nDiff;
                                        nBTop -= nDiff * nBHeight;
                                    }

                                    if(nBTop + nBHeight <= nOTop)
                                    {
                                        const sal_Int32 nDiff(-nBTop / nBHeight);

                                        nPosY += nDiff;
                                        nBTop += nDiff * nBHeight;
                                    }

                                    // prepare OutDev
                                    const Point aEmptyPoint(0, 0);
                                    const ::tools::Rectangle aVisiblePixel(aEmptyPoint, mpOutputDevice->GetOutputSizePixel());
                                    const bool bWasEnabled(mpOutputDevice->IsMapModeEnabled());
                                    mpOutputDevice->EnableMapMode(false);

                                    // check if offset is used
                                    const sal_Int32 nOffsetX(basegfx::fround(rFillGraphicAttribute.getOffsetX() * nBWidth));

                                    if(nOffsetX)
                                    {
                                        // offset in X, so iterate over Y first and draw lines
                                        for(sal_Int32 nYPos(nBTop); nYPos < nOTop + nOHeight; nYPos += nBHeight, nPosY++)
                                        {
                                            for(sal_Int32 nXPos((nPosY % 2) ? nBLeft - nBWidth + nOffsetX : nBLeft);
                                                nXPos < nOLeft + nOWidth; nXPos += nBWidth)
                                            {
                                                const ::tools::Rectangle aOutRectPixel(Point(nXPos, nYPos), aNeededBitmapSizePixel);

                                                if(aOutRectPixel.IsOver(aVisiblePixel))
                                                {
                                                    if(bPreScaled)
                                                    {
                                                        mpOutputDevice->DrawBitmapEx(aOutRectPixel.TopLeft(), aBitmapEx);
                                                    }
                                                    else
                                                    {
                                                        mpOutputDevice->DrawBitmapEx(aOutRectPixel.TopLeft(), aNeededBitmapSizePixel, aBitmapEx);
                                                    }
                                                }
                                            }
                                        }
                                    }
                                    else
                                    {
                                        // check if offset is used
                                        const sal_Int32 nOffsetY(basegfx::fround(rFillGraphicAttribute.getOffsetY() * nBHeight));

                                        // possible offset in Y, so iterate over X first and draw columns
                                        for(sal_Int32 nXPos(nBLeft); nXPos < nOLeft + nOWidth; nXPos += nBWidth, nPosX++)
                                        {
                                            for(sal_Int32 nYPos((nPosX % 2) ? nBTop - nBHeight + nOffsetY : nBTop);
                                                nYPos < nOTop + nOHeight; nYPos += nBHeight)
                                            {
                                                const ::tools::Rectangle aOutRectPixel(Point(nXPos, nYPos), aNeededBitmapSizePixel);

                                                if(aOutRectPixel.IsOver(aVisiblePixel))
                                                {
                                                    if(bPreScaled)
                                                    {
                                                        mpOutputDevice->DrawBitmapEx(aOutRectPixel.TopLeft(), aBitmapEx);
                                                    }
                                                    else
                                                    {
                                                        mpOutputDevice->DrawBitmapEx(aOutRectPixel.TopLeft(), aNeededBitmapSizePixel, aBitmapEx);
                                                    }
                                                }
                                            }
                                        }
                                    }

                                    // restore OutDev
                                    mpOutputDevice->EnableMapMode(bWasEnabled);
                                }
                            }
                        }
                    }
                }
            }

            if(!bPrimitiveAccepted)
            {
                // do not accept, use decomposition
                process(rFillBitmapCandidate);
            }
        }

        // direct draw of Graphic
        void VclProcessor2D::RenderPolyPolygonGraphicPrimitive2D(const primitive2d::PolyPolygonGraphicPrimitive2D& rPolygonCandidate)
        {
            bool bDone(false);
            const basegfx::B2DPolyPolygon& rPolyPolygon = rPolygonCandidate.getB2DPolyPolygon();

            // #121194# Todo: check if this works
            if(!rPolyPolygon.count())
            {
                // empty polyPolygon, done
                bDone = true;
            }
            else
            {
                const attribute::FillGraphicAttribute& rFillGraphicAttribute = rPolygonCandidate.getFillGraphic();

                // try to catch cases where the graphic will be color-modified to a single
                // color (e.g. shadow)
                switch(rFillGraphicAttribute.getGraphic().GetType())
                {
                    case GraphicType::GdiMetafile:
                    {
                        // metafiles are potentially transparent, cannot optimize, not done
                        break;
                    }
                    case GraphicType::Bitmap:
                    {
                        if(!rFillGraphicAttribute.getGraphic().IsTransparent() && !rFillGraphicAttribute.getGraphic().IsAlpha())
                        {
                            // bitmap is not transparent and has no alpha
                            const sal_uInt32 nBColorModifierStackCount(maBColorModifierStack.count());

                            if(nBColorModifierStackCount)
                            {
                                const basegfx::BColorModifierSharedPtr& rTopmostModifier = maBColorModifierStack.getBColorModifier(nBColorModifierStackCount - 1);
                                const basegfx::BColorModifier_replace* pReplacer = dynamic_cast< const basegfx::BColorModifier_replace* >(rTopmostModifier.get());

                                if(pReplacer)
                                {
                                    // the bitmap fill is in unified color, so we can replace it with
                                    // a single polygon fill. The form of the fill depends on tiling
                                    if(rFillGraphicAttribute.getTiling())
                                    {
                                        // with tiling, fill the whole tools::PolyPolygon with the modifier color
                                        basegfx::B2DPolyPolygon aLocalPolyPolygon(rPolyPolygon);

                                        aLocalPolyPolygon.transform(maCurrentTransformation);
                                        mpOutputDevice->SetLineColor();
                                        mpOutputDevice->SetFillColor(Color(pReplacer->getBColor()));
                                        mpOutputDevice->DrawPolyPolygon(aLocalPolyPolygon);
                                    }
                                    else
                                    {
                                        // without tiling, only the area common to the bitmap tile and the
                                        // tools::PolyPolygon is filled. Create the bitmap tile area in object
                                        // coordinates. For this, the object transformation needs to be created
                                        // from the already scaled PolyPolygon. The tile area in object
                                        // coordinates will always be non-rotated, so it's not necessary to
                                        // work with a polygon here
                                        basegfx::B2DRange aTileRange(rFillGraphicAttribute.getGraphicRange());
                                        const basegfx::B2DRange aPolyPolygonRange(rPolyPolygon.getB2DRange());
                                        const basegfx::B2DHomMatrix aNewObjectTransform(
                                            basegfx::utils::createScaleTranslateB2DHomMatrix(
                                                aPolyPolygonRange.getRange(),
                                                aPolyPolygonRange.getMinimum()));

                                        aTileRange.transform(aNewObjectTransform);

                                        // now clip the object polyPolygon against the tile range
                                        // to get the common area
                                        basegfx::B2DPolyPolygon aTarget = basegfx::utils::clipPolyPolygonOnRange(
                                            rPolyPolygon,
                                            aTileRange,
                                            true,
                                            false);

                                        if(aTarget.count())
                                        {
                                            aTarget.transform(maCurrentTransformation);
                                            mpOutputDevice->SetLineColor();
                                            mpOutputDevice->SetFillColor(Color(pReplacer->getBColor()));
                                            mpOutputDevice->DrawPolyPolygon(aTarget);
                                        }
                                    }

                                    // simplified output executed, we are done
                                    bDone = true;
                                }
                            }
                        }
                        break;
                    }
                    default: //GraphicType::NONE, GraphicType::Default
                    {
                        // empty graphic, we are done
                        bDone = true;
                        break;
                    }
                }
            }

            if(!bDone)
            {
                // use default decomposition
                process(rPolygonCandidate);
            }
        }

        // mask group. Force output to VDev and create mask from given mask
        void VclProcessor2D::RenderMaskPrimitive2DPixel(const primitive2d::MaskPrimitive2D& rMaskCandidate)
        {
            if(!rMaskCandidate.getChildren().empty())
            {
                basegfx::B2DPolyPolygon aMask(rMaskCandidate.getMask());

                if(aMask.count())
                {
                    aMask.transform(maCurrentTransformation);
                    const basegfx::B2DRange aRange(basegfx::utils::getRange(aMask));
                    impBufferDevice aBufferDevice(*mpOutputDevice, aRange);

                    if(aBufferDevice.isVisible())
                    {
                        // remember last OutDev and set to content
                        OutputDevice* pLastOutputDevice = mpOutputDevice;
                        mpOutputDevice = &aBufferDevice.getContent();

                        // paint to it
                        process(rMaskCandidate.getChildren());

                        // back to old OutDev
                        mpOutputDevice = pLastOutputDevice;

                        // if the mask fills the whole area we can skip
                        // creating a transparent vd and filling it.
                        if (!basegfx::utils::isRectangle(aMask))
                        {
                            // draw mask
                            if(getOptionsDrawinglayer().IsAntiAliasing())
                            {
                                // with AA, use 8bit AlphaMask to get nice borders
                                VirtualDevice& rTransparence = aBufferDevice.getTransparence();
                                rTransparence.SetLineColor();
                                rTransparence.SetFillColor(COL_BLACK);
                                rTransparence.DrawPolyPolygon(aMask);
                            }
                            else
                            {
                                // No AA, use 1bit mask
                                VirtualDevice& rMask = aBufferDevice.getMask();
                                rMask.SetLineColor();
                                rMask.SetFillColor(COL_BLACK);
                                rMask.DrawPolyPolygon(aMask);
                            }
                        }

                        // dump buffer to outdev
                        aBufferDevice.paint();

                    }
                }
            }
        }

        // modified color group. Force output to unified color.
        void VclProcessor2D::RenderModifiedColorPrimitive2D(const primitive2d::ModifiedColorPrimitive2D& rModifiedCandidate)
        {
            if(!rModifiedCandidate.getChildren().empty())
            {
                maBColorModifierStack.push(rModifiedCandidate.getColorModifier());
                process(rModifiedCandidate.getChildren());
                maBColorModifierStack.pop();
            }
        }

        // unified sub-transparence. Draw to VDev first.
        void VclProcessor2D::RenderUnifiedTransparencePrimitive2D(const primitive2d::UnifiedTransparencePrimitive2D& rTransCandidate)
        {
            if(!rTransCandidate.getChildren().empty())
            {
                if(0.0 == rTransCandidate.getTransparence())
                {
                    // no transparence used, so just use the content
                    process(rTransCandidate.getChildren());
                }
                else if(rTransCandidate.getTransparence() > 0.0 && rTransCandidate.getTransparence() < 1.0)
                {
                    // transparence is in visible range
                    basegfx::B2DRange aRange(rTransCandidate.getChildren().getB2DRange(getViewInformation2D()));
                    aRange.transform(maCurrentTransformation);
                    impBufferDevice aBufferDevice(*mpOutputDevice, aRange);

                    if(aBufferDevice.isVisible())
                    {
                        // remember last OutDev and set to content
                        OutputDevice* pLastOutputDevice = mpOutputDevice;
                        mpOutputDevice = &aBufferDevice.getContent();

                        // paint content to it
                        process(rTransCandidate.getChildren());

                        // back to old OutDev
                        mpOutputDevice = pLastOutputDevice;

                        // dump buffer to outdev using given transparence
                        aBufferDevice.paint(rTransCandidate.getTransparence());
                    }
                }
            }
        }

        // sub-transparence group. Draw to VDev first.
        void VclProcessor2D::RenderTransparencePrimitive2D(const primitive2d::TransparencePrimitive2D& rTransCandidate)
        {
            if(!rTransCandidate.getChildren().empty())
            {
                basegfx::B2DRange aRange(rTransCandidate.getChildren().getB2DRange(getViewInformation2D()));
                aRange.transform(maCurrentTransformation);
                impBufferDevice aBufferDevice(*mpOutputDevice, aRange);

                if(aBufferDevice.isVisible())
                {
                    // remember last OutDev and set to content
                    OutputDevice* pLastOutputDevice = mpOutputDevice;
                    mpOutputDevice = &aBufferDevice.getContent();

                    // paint content to it
                    process(rTransCandidate.getChildren());

                    // set to mask
                    mpOutputDevice = &aBufferDevice.getTransparence();

                    // when painting transparence masks, reset the color stack
                    basegfx::BColorModifierStack aLastBColorModifierStack(maBColorModifierStack);
                    maBColorModifierStack = basegfx::BColorModifierStack();

                    // paint mask to it (always with transparence intensities, evtl. with AA)
                    process(rTransCandidate.getTransparence());

                    // back to old color stack
                    maBColorModifierStack = aLastBColorModifierStack;

                    // back to old OutDev
                    mpOutputDevice = pLastOutputDevice;

                    // dump buffer to outdev
                    aBufferDevice.paint();
                }
            }
        }

        // transform group.
        void VclProcessor2D::RenderTransformPrimitive2D(const primitive2d::TransformPrimitive2D& rTransformCandidate)
        {
            // remember current transformation and ViewInformation
            const basegfx::B2DHomMatrix aLastCurrentTransformation(maCurrentTransformation);
            const geometry::ViewInformation2D aLastViewInformation2D(getViewInformation2D());

            // create new transformations for CurrentTransformation
            // and for local ViewInformation2D
            maCurrentTransformation = maCurrentTransformation * rTransformCandidate.getTransformation();
            const geometry::ViewInformation2D aViewInformation2D(
                getViewInformation2D().getObjectTransformation() * rTransformCandidate.getTransformation(),
                getViewInformation2D().getViewTransformation(),
                getViewInformation2D().getViewport(),
                getViewInformation2D().getVisualizedPage(),
                getViewInformation2D().getViewTime(),
                getViewInformation2D().getExtendedInformationSequence());
            updateViewInformation(aViewInformation2D);

            // process content
            process(rTransformCandidate.getChildren());

            // restore transformations
            maCurrentTransformation = aLastCurrentTransformation;
            updateViewInformation(aLastViewInformation2D);
        }

        // new XDrawPage for ViewInformation2D
        void VclProcessor2D::RenderPagePreviewPrimitive2D(const primitive2d::PagePreviewPrimitive2D& rPagePreviewCandidate)
        {
            // remember current transformation and ViewInformation
            const geometry::ViewInformation2D aLastViewInformation2D(getViewInformation2D());

            // create new local ViewInformation2D
            const geometry::ViewInformation2D aViewInformation2D(
                getViewInformation2D().getObjectTransformation(),
                getViewInformation2D().getViewTransformation(),
                getViewInformation2D().getViewport(),
                rPagePreviewCandidate.getXDrawPage(),
                getViewInformation2D().getViewTime(),
                getViewInformation2D().getExtendedInformationSequence());
            updateViewInformation(aViewInformation2D);

            // process decomposed content
            process(rPagePreviewCandidate);

            // restore transformations
            updateViewInformation(aLastViewInformation2D);
        }

        // marker
        void VclProcessor2D::RenderMarkerArrayPrimitive2D(const primitive2d::MarkerArrayPrimitive2D& rMarkArrayCandidate)
        {
            // get data
            const std::vector< basegfx::B2DPoint >& rPositions = rMarkArrayCandidate.getPositions();
            const sal_uInt32 nCount(rPositions.size());

            if(nCount && !rMarkArrayCandidate.getMarker().IsEmpty())
            {
                // get pixel size
                const BitmapEx& rMarker(rMarkArrayCandidate.getMarker());
                const Size aBitmapSize(rMarker.GetSizePixel());

                if(aBitmapSize.Width() && aBitmapSize.Height())
                {
                    // get discrete half size
                    const basegfx::B2DVector aDiscreteHalfSize(
                        (aBitmapSize.getWidth() - 1.0) * 0.5,
                        (aBitmapSize.getHeight() - 1.0) * 0.5);
                    const bool bWasEnabled(mpOutputDevice->IsMapModeEnabled());

                    // do not forget evtl. moved origin in target device MapMode when
                    // switching it off; it would be missing and lead to wrong positions.
                    // All his could be done using logic sizes and coordinates, too, but
                    // we want a 1:1 bitmap rendering here, so it's more safe and faster
                    // to work with switching off MapMode usage completely.
                    const Point aOrigin(mpOutputDevice->GetMapMode().GetOrigin());

                    mpOutputDevice->EnableMapMode(false);

                    for (auto const& pos : rPositions)
                    {
                        const basegfx::B2DPoint aDiscreteTopLeft((maCurrentTransformation * pos) - aDiscreteHalfSize);
                        const Point aDiscretePoint(basegfx::fround(aDiscreteTopLeft.getX()), basegfx::fround(aDiscreteTopLeft.getY()));

                        mpOutputDevice->DrawBitmapEx(aDiscretePoint + aOrigin, rMarker);
                    }

                    mpOutputDevice->EnableMapMode(bWasEnabled);
                }
            }
        }

        // point
        void VclProcessor2D::RenderPointArrayPrimitive2D(const primitive2d::PointArrayPrimitive2D& rPointArrayCandidate)
        {
            const std::vector< basegfx::B2DPoint >& rPositions = rPointArrayCandidate.getPositions();
            const basegfx::BColor aRGBColor(maBColorModifierStack.getModifiedColor(rPointArrayCandidate.getRGBColor()));
            const Color aVCLColor(aRGBColor);

            for (auto const& pos : rPositions)
            {
                const basegfx::B2DPoint aViewPosition(maCurrentTransformation * pos);
                const Point aPos(basegfx::fround(aViewPosition.getX()), basegfx::fround(aViewPosition.getY()));

                mpOutputDevice->DrawPixel(aPos, aVCLColor);
            }
        }

        void VclProcessor2D::RenderPolygonStrokePrimitive2D(const primitive2d::PolygonStrokePrimitive2D& rPolygonStrokeCandidate)
        {
            // #i101491# method restructured to clearly use the DrawPolyLine
            // calls starting from a defined line width
            const attribute::LineAttribute& rLineAttribute = rPolygonStrokeCandidate.getLineAttribute();
            const double fLineWidth(rLineAttribute.getWidth());
            bool bDone(false);

            if(basegfx::fTools::more(fLineWidth, 0.0))
            {
                const basegfx::B2DVector aDiscreteUnit(maCurrentTransformation * basegfx::B2DVector(fLineWidth, 0.0));
                const double fDiscreteLineWidth(aDiscreteUnit.getLength());
                const attribute::StrokeAttribute& rStrokeAttribute = rPolygonStrokeCandidate.getStrokeAttribute();
                const basegfx::BColor aHairlineColor(maBColorModifierStack.getModifiedColor(rLineAttribute.getColor()));
                basegfx::B2DPolyPolygon aHairlinePolyPolygon;

                mpOutputDevice->SetLineColor(Color(aHairlineColor));
                mpOutputDevice->SetFillColor();

                if(0.0 == rStrokeAttribute.getFullDotDashLen())
                {
                    // no line dashing, just copy
                    aHairlinePolyPolygon.append(rPolygonStrokeCandidate.getB2DPolygon());
                }
                else
                {
                    // else apply LineStyle
                    basegfx::utils::applyLineDashing(rPolygonStrokeCandidate.getB2DPolygon(),
                        rStrokeAttribute.getDotDashArray(),
                        &aHairlinePolyPolygon, nullptr, rStrokeAttribute.getFullDotDashLen());
                }

                const sal_uInt32 nCount(aHairlinePolyPolygon.count());

                if(nCount)
                {
                    const bool bAntiAliased(getOptionsDrawinglayer().IsAntiAliasing());
                    aHairlinePolyPolygon.transform(maCurrentTransformation);

                    if(bAntiAliased)
                    {
                        if(basegfx::fTools::lessOrEqual(fDiscreteLineWidth, 1.0))
                        {
                            // line in range ]0.0 .. 1.0[
                            // paint as simple hairline
                            for(sal_uInt32 a(0); a < nCount; a++)
                            {
                                mpOutputDevice->DrawPolyLine(aHairlinePolyPolygon.getB2DPolygon(a), 0.0);
                            }

                            bDone = true;
                        }
                        else if(basegfx::fTools::lessOrEqual(fDiscreteLineWidth, 2.0))
                        {
                            // line in range [1.0 .. 2.0[
                            // paint as 2x2 with dynamic line distance
                            basegfx::B2DHomMatrix aMat;
                            const double fDistance(fDiscreteLineWidth - 1.0);
                            const double fHalfDistance(fDistance * 0.5);

                            for(sal_uInt32 a(0); a < nCount; a++)
                            {
                                basegfx::B2DPolygon aCandidate(aHairlinePolyPolygon.getB2DPolygon(a));

                                aMat.set(0, 2, -fHalfDistance);
                                aMat.set(1, 2, -fHalfDistance);
                                aCandidate.transform(aMat);
                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);

                                aMat.set(0, 2, fDistance);
                                aMat.set(1, 2, 0.0);
                                aCandidate.transform(aMat);
                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);

                                aMat.set(0, 2, 0.0);
                                aMat.set(1, 2, fDistance);
                                aCandidate.transform(aMat);
                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);

                                aMat.set(0, 2, -fDistance);
                                aMat.set(1, 2, 0.0);
                                aCandidate.transform(aMat);
                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);
                            }

                            bDone = true;
                        }
                        else if(basegfx::fTools::lessOrEqual(fDiscreteLineWidth, 3.0))
                        {
                            // line in range [2.0 .. 3.0]
                            // paint as cross in a 3x3  with dynamic line distance
                            basegfx::B2DHomMatrix aMat;
                            const double fDistance((fDiscreteLineWidth - 1.0) * 0.5);

                            for(sal_uInt32 a(0); a < nCount; a++)
                            {
                                basegfx::B2DPolygon aCandidate(aHairlinePolyPolygon.getB2DPolygon(a));

                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);

                                aMat.set(0, 2, -fDistance);
                                aMat.set(1, 2, 0.0);
                                aCandidate.transform(aMat);
                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);

                                aMat.set(0, 2, fDistance);
                                aMat.set(1, 2, -fDistance);
                                aCandidate.transform(aMat);
                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);

                                aMat.set(0, 2, fDistance);
                                aMat.set(1, 2, fDistance);
                                aCandidate.transform(aMat);
                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);

                                aMat.set(0, 2, -fDistance);
                                aMat.set(1, 2, fDistance);
                                aCandidate.transform(aMat);
                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);
                            }

                            bDone = true;
                        }
                        else
                        {
                            // #i101491# line width above 3.0
                        }
                    }
                    else
                    {
                        if(basegfx::fTools::lessOrEqual(fDiscreteLineWidth, 1.5))
                        {
                            // line width below 1.5, draw the basic hairline polygon
                            for(sal_uInt32 a(0); a < nCount; a++)
                            {
                                mpOutputDevice->DrawPolyLine(aHairlinePolyPolygon.getB2DPolygon(a), 0.0);
                            }

                            bDone = true;
                        }
                        else if(basegfx::fTools::lessOrEqual(fDiscreteLineWidth, 2.5))
                        {
                            // line width is in range ]1.5 .. 2.5], use four hairlines
                            // drawn in a square
                            for(sal_uInt32 a(0); a < nCount; a++)
                            {
                                basegfx::B2DPolygon aCandidate(aHairlinePolyPolygon.getB2DPolygon(a));
                                basegfx::B2DHomMatrix aMat;

                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);

                                aMat.set(0, 2, 1.0);
                                aMat.set(1, 2, 0.0);
                                aCandidate.transform(aMat);

                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);

                                aMat.set(0, 2, 0.0);
                                aMat.set(1, 2, 1.0);
                                aCandidate.transform(aMat);

                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);

                                aMat.set(0, 2, -1.0);
                                aMat.set(1, 2, 0.0);
                                aCandidate.transform(aMat);

                                mpOutputDevice->DrawPolyLine(aCandidate, 0.0);
                            }

                            bDone = true;
                        }
                        else
                        {
                            // #i101491# line width is above 2.5
                        }
                    }

                    if(!bDone && rPolygonStrokeCandidate.getB2DPolygon().count() > 1000)
                    {
                        // #i101491# If the polygon complexity uses more than a given amount, do
                        // use OutputDevice::DrawPolyLine directly; this will avoid buffering all
                        // decompositions in primitives (memory) and fallback to old line painting
                        // for very complex polygons, too
                        for(sal_uInt32 a(0); a < nCount; a++)
                        {
                            mpOutputDevice->DrawPolyLine(
                                aHairlinePolyPolygon.getB2DPolygon(a),
                                fDiscreteLineWidth,
                                rLineAttribute.getLineJoin(),
                                rLineAttribute.getLineCap(),
                                rLineAttribute.getMiterMinimumAngle());
                        }

                        bDone = true;
                    }
                }
            }

            if(!bDone)
            {
                // remember that we enter a PolygonStrokePrimitive2D decomposition,
                // used for AA thick line drawing
                mnPolygonStrokePrimitive2D++;

                // line width is big enough for standard filled polygon visualisation or zero
                process(rPolygonStrokeCandidate);

                // leave PolygonStrokePrimitive2D
                mnPolygonStrokePrimitive2D--;
            }
        }

        void VclProcessor2D::RenderEpsPrimitive2D(const primitive2d::EpsPrimitive2D& rEpsPrimitive2D)
        {
            // The new decomposition of Metafiles made it necessary to add an Eps
            // primitive to handle embedded Eps data. On some devices, this can be
            // painted directly (mac, printer).
            // To be able to handle the replacement correctly, i need to handle it myself
            // since DrawEPS will not be able e.g. to rotate the replacement. To be able
            // to do that, i added a boolean return to OutputDevice::DrawEPS(..)
            // to know when EPS was handled directly already.
            basegfx::B2DRange aRange(0.0, 0.0, 1.0, 1.0);
            aRange.transform(maCurrentTransformation * rEpsPrimitive2D.getEpsTransform());

            if(!aRange.isEmpty())
            {
                const ::tools::Rectangle aRectangle(
                    static_cast<sal_Int32>(floor(aRange.getMinX())), static_cast<sal_Int32>(floor(aRange.getMinY())),
                    static_cast<sal_Int32>(ceil(aRange.getMaxX())), static_cast<sal_Int32>(ceil(aRange.getMaxY())));

                if(!aRectangle.IsEmpty())
                {
                    bool bWillReallyRender = mpOutputDevice->IsDeviceOutputNecessary();
                    // try to paint EPS directly without fallback visualisation
                    const bool bEPSPaintedDirectly = bWillReallyRender &&
                        mpOutputDevice->DrawEPS(
                        aRectangle.TopLeft(),
                        aRectangle.GetSize(),
                        rEpsPrimitive2D.getGfxLink());

                    if(!bEPSPaintedDirectly)
                    {
                        // use the decomposition which will correctly handle the
                        // fallback visualisation using full transformation (e.g. rotation)
                        process(rEpsPrimitive2D);
                    }
                }
            }
        }

        void VclProcessor2D::RenderObjectInfoPrimitive2D(const primitive2d::ObjectInfoPrimitive2D& rObjectInfoPrimitive2D)
        {
            // remember current ObjectInfoPrimitive2D and set new current one (build a stack - push)
            const primitive2d::ObjectInfoPrimitive2D* pLast(getObjectInfoPrimitive2D());
            mpObjectInfoPrimitive2D = &rObjectInfoPrimitive2D;

            // process content
            process(rObjectInfoPrimitive2D.getChildren());

            // restore current ObjectInfoPrimitive2D (pop)
            mpObjectInfoPrimitive2D = pLast;
        }

        void VclProcessor2D::RenderSvgLinearAtomPrimitive2D(const primitive2d::SvgLinearAtomPrimitive2D& rCandidate)
        {
            const double fDelta(rCandidate.getOffsetB() - rCandidate.getOffsetA());

            if(basegfx::fTools::more(fDelta, 0.0))
            {
                const basegfx::BColor aColorA(maBColorModifierStack.getModifiedColor(rCandidate.getColorA()));
                const basegfx::BColor aColorB(maBColorModifierStack.getModifiedColor(rCandidate.getColorB()));

                // calculate discrete unit in WorldCoordinates; use diagonal (1.0, 1.0) and divide by sqrt(2)
                const basegfx::B2DVector aDiscreteVector(getViewInformation2D().getInverseObjectToViewTransformation() * basegfx::B2DVector(1.0, 1.0));
                const double fDiscreteUnit(aDiscreteVector.getLength() * (1.0 / 1.414213562373));

                // use color distance and discrete lengths to calculate step count
                const sal_uInt32 nSteps(calculateStepsForSvgGradient(aColorA, aColorB, fDelta, fDiscreteUnit));

                // switch off line painting
                mpOutputDevice->SetLineColor();

                // prepare polygon in needed width at start position (with discrete overlap)
                const basegfx::B2DPolygon aPolygon(
                    basegfx::utils::createPolygonFromRect(
                        basegfx::B2DRange(
                            rCandidate.getOffsetA() - fDiscreteUnit,
                            0.0,
                            rCandidate.getOffsetA() + (fDelta / nSteps) + fDiscreteUnit,
                            1.0)));


                // prepare loop ([0.0 .. 1.0[)
                double fUnitScale(0.0);
                const double fUnitStep(1.0 / nSteps);

                // loop and paint
                for(sal_uInt32 a(0); a < nSteps; a++, fUnitScale += fUnitStep)
                {
                    basegfx::B2DPolygon aNew(aPolygon);

                    aNew.transform(maCurrentTransformation * basegfx::utils::createTranslateB2DHomMatrix(fDelta * fUnitScale, 0.0));
                    mpOutputDevice->SetFillColor(Color(basegfx::interpolate(aColorA, aColorB, fUnitScale)));
                    mpOutputDevice->DrawPolyPolygon(basegfx::B2DPolyPolygon(aNew));
                }
            }
        }

        void VclProcessor2D::RenderSvgRadialAtomPrimitive2D(const primitive2d::SvgRadialAtomPrimitive2D& rCandidate)
        {
            const double fDeltaScale(rCandidate.getScaleB() - rCandidate.getScaleA());

            if(basegfx::fTools::more(fDeltaScale, 0.0))
            {
                const basegfx::BColor aColorA(maBColorModifierStack.getModifiedColor(rCandidate.getColorA()));
                const basegfx::BColor aColorB(maBColorModifierStack.getModifiedColor(rCandidate.getColorB()));

                // calculate discrete unit in WorldCoordinates; use diagonal (1.0, 1.0) and divide by sqrt(2)
                const basegfx::B2DVector aDiscreteVector(getViewInformation2D().getInverseObjectToViewTransformation() * basegfx::B2DVector(1.0, 1.0));
                const double fDiscreteUnit(aDiscreteVector.getLength() * (1.0 / 1.414213562373));

                // use color distance and discrete lengths to calculate step count
                const sal_uInt32 nSteps(calculateStepsForSvgGradient(aColorA, aColorB, fDeltaScale, fDiscreteUnit));

                // switch off line painting
                mpOutputDevice->SetLineColor();

                // prepare loop ([0.0 .. 1.0[, full polygons, no polypolygons with holes)
                double fUnitScale(0.0);
                const double fUnitStep(1.0 / nSteps);

                for(sal_uInt32 a(0); a < nSteps; a++, fUnitScale += fUnitStep)
                {
                    basegfx::B2DHomMatrix aTransform;
                    const double fEndScale(rCandidate.getScaleB() - (fDeltaScale * fUnitScale));

                    if(rCandidate.isTranslateSet())
                    {
                        const basegfx::B2DVector aTranslate(
                            basegfx::interpolate(
                                rCandidate.getTranslateB(),
                                rCandidate.getTranslateA(),
                                fUnitScale));

                        aTransform = basegfx::utils::createScaleTranslateB2DHomMatrix(
                            fEndScale,
                            fEndScale,
                            aTranslate.getX(),
                            aTranslate.getY());
                    }
                    else
                    {
                        aTransform = basegfx::utils::createScaleB2DHomMatrix(
                            fEndScale,
                            fEndScale);
                    }

                    basegfx::B2DPolygon aNew(basegfx::utils::createPolygonFromUnitCircle());

                    aNew.transform(maCurrentTransformation * aTransform);
                    mpOutputDevice->SetFillColor(Color(basegfx::interpolate(aColorB, aColorA, fUnitScale)));
                    mpOutputDevice->DrawPolyPolygon(basegfx::B2DPolyPolygon(aNew));
                }
            }
        }

        void VclProcessor2D::adaptLineToFillDrawMode() const
        {
            const DrawModeFlags nOriginalDrawMode(mpOutputDevice->GetDrawMode());

            if(nOriginalDrawMode & (DrawModeFlags::BlackLine|DrawModeFlags::GrayLine|DrawModeFlags::WhiteLine|DrawModeFlags::SettingsLine))
            {
                DrawModeFlags nAdaptedDrawMode(nOriginalDrawMode);

                if(nOriginalDrawMode & DrawModeFlags::BlackLine)
                {
                    nAdaptedDrawMode |= DrawModeFlags::BlackFill;
                }
                else
                {
                    nAdaptedDrawMode &= ~DrawModeFlags::BlackFill;
                }

                if(nOriginalDrawMode & DrawModeFlags::GrayLine)
                {
                    nAdaptedDrawMode |= DrawModeFlags::GrayFill;
                }
                else
                {
                    nAdaptedDrawMode &= ~DrawModeFlags::GrayFill;
                }

                if(nOriginalDrawMode & DrawModeFlags::WhiteLine)
                {
                    nAdaptedDrawMode |= DrawModeFlags::WhiteFill;
                }
                else
                {
                    nAdaptedDrawMode &= ~DrawModeFlags::WhiteFill;
                }

                if(nOriginalDrawMode & DrawModeFlags::SettingsLine)
                {
                    nAdaptedDrawMode |= DrawModeFlags::SettingsFill;
                }
                else
                {
                    nAdaptedDrawMode &= ~DrawModeFlags::SettingsFill;
                }

                mpOutputDevice->SetDrawMode(nAdaptedDrawMode);
            }
        }

        void VclProcessor2D::adaptTextToFillDrawMode() const
        {
            const DrawModeFlags nOriginalDrawMode(mpOutputDevice->GetDrawMode());
            if(nOriginalDrawMode & (DrawModeFlags::BlackText|DrawModeFlags::GrayText|DrawModeFlags::WhiteText|DrawModeFlags::SettingsText))
            {
                DrawModeFlags nAdaptedDrawMode(nOriginalDrawMode);

                if(nOriginalDrawMode & DrawModeFlags::BlackText)
                {
                    nAdaptedDrawMode |= DrawModeFlags::BlackFill;
                }
                else
                {
                    nAdaptedDrawMode &= ~DrawModeFlags::BlackFill;
                }

                if(nOriginalDrawMode & DrawModeFlags::GrayText)
                {
                    nAdaptedDrawMode |= DrawModeFlags::GrayFill;
                }
                else
                {
                    nAdaptedDrawMode &= ~DrawModeFlags::GrayFill;
                }

                if(nOriginalDrawMode & DrawModeFlags::WhiteText)
                {
                    nAdaptedDrawMode |= DrawModeFlags::WhiteFill;
                }
                else
                {
                    nAdaptedDrawMode &= ~DrawModeFlags::WhiteFill;
                }

                if(nOriginalDrawMode & DrawModeFlags::SettingsText)
                {
                    nAdaptedDrawMode |= DrawModeFlags::SettingsFill;
                }
                else
                {
                    nAdaptedDrawMode &= ~DrawModeFlags::SettingsFill;
                }

                mpOutputDevice->SetDrawMode(nAdaptedDrawMode);
            }
        }

        // process support

        VclProcessor2D::VclProcessor2D(
            const geometry::ViewInformation2D& rViewInformation,
            OutputDevice& rOutDev)
        :   BaseProcessor2D(rViewInformation),
            mpOutputDevice(&rOutDev),
            maBColorModifierStack(),
            maCurrentTransformation(),
            maDrawinglayerOpt(),
            mnPolygonStrokePrimitive2D(0),
            mpObjectInfoPrimitive2D(nullptr)
        {
            // set digit language, derived from SvtCTLOptions to have the correct
            // number display for arabic/hindi numerals
            rOutDev.SetDigitLanguage(drawinglayer::detail::getDigitLanguage());
        }

        VclProcessor2D::~VclProcessor2D()
        {
        }
    }
}

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