xref: /trunk/main/drawinglayer/source/processor2d/vclprocessor2d.cxx (revision 49c58f9b96505f3cbf98f603adf32c32a50f39c6)

/**************************************************************
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_drawinglayer.hxx"

#include <drawinglayer/processor2d/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/wrongspellprimitive2d.hxx>
#include <svl/ctloptions.hxx>
#include <vcl/svapp.hxx>
#include <drawinglayer/primitive2d/pagepreviewprimitive2d.hxx>
#include <tools/diagnose_ex.h>
#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>

//////////////////////////////////////////////////////////////////////////////
// control support

#include <com/sun/star/awt/XWindow2.hpp>
#include <com/sun/star/awt/PosSize.hpp>
#include <com/sun/star/awt/XView.hpp>
#include <drawinglayer/primitive2d/controlprimitive2d.hxx>
#include <drawinglayer/primitive2d/textlayoutdevice.hxx>

//////////////////////////////////////////////////////////////////////////////
// for test, can be removed again

#include <basegfx/polygon/b2dpolygonclipper.hxx>
#include <basegfx/polygon/b2dtrapezoid.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;
    }
} // end of anonymous namespace

//////////////////////////////////////////////////////////////////////////////

namespace drawinglayer
{
    namespace processor2d
    {
        //////////////////////////////////////////////////////////////////////////////
        // UNO class usages
        using ::com::sun::star::uno::Reference;
        using ::com::sun::star::uno::UNO_QUERY;
        using ::com::sun::star::uno::UNO_QUERY_THROW;
        using ::com::sun::star::uno::Exception;
        using ::com::sun::star::awt::XView;
        using ::com::sun::star::awt::XGraphics;
        using ::com::sun::star::awt::XWindow;
        using ::com::sun::star::awt::PosSize::POSSIZE;

        //////////////////////////////////////////////////////////////////////////////
        // 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);

            if(basegfx::fTools::equalZero(fShearX))
            {
                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)
                    Font aFont(primitive2d::getVclFontFromFontAttribute(
                        rTextCandidate.getFontAttribute(),
                        aFontScaling.getX(),
                        aFontScaling.getY(),
                        fRotate,
                        rTextCandidate.getLocale()));

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

                    if( pTCPP != NULL )
                    {

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

                        // set Overline attribute
                        const FontUnderline eFontOverline(primitive2d::mapTextLineToFontUnderline( pTCPP->getFontOverline() ));
                        if( eFontOverline != UNDERLINE_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 FontUnderline eFontUnderline(primitive2d::mapTextLineToFontUnderline( pTCPP->getFontUnderline() ));
                        if( eFontUnderline != UNDERLINE_NONE )
                        {
                            aFont.SetUnderline( eFontUnderline );
                            if( pTCPP->getWordLineMode() )
                                aFont.SetWordLineMode( true );
//TODO: ???                 if( pTCPP->getUnderlineAbove() )
//                              aFont.SetUnderlineAbove( true );
                        }

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

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

                        // set EmphasisMark attribute
                        FontEmphasisMark eFontEmphasisMark = EMPHASISMARK_NONE;
                        switch( pTCPP->getTextEmphasisMark() )
                        {
                            default:
                                DBG_WARNING1( "DrawingLayer: Unknown EmphasisMark style (%d)!", pTCPP->getTextEmphasisMark() );
                                // fall through
                            case primitive2d::TEXT_EMPHASISMARK_NONE:   eFontEmphasisMark = EMPHASISMARK_NONE; break;
                            case primitive2d::TEXT_EMPHASISMARK_DOT:    eFontEmphasisMark = EMPHASISMARK_DOT; break;
                            case primitive2d::TEXT_EMPHASISMARK_CIRCLE: eFontEmphasisMark = EMPHASISMARK_CIRCLE; break;
                            case primitive2d::TEXT_EMPHASISMARK_DISC:   eFontEmphasisMark = EMPHASISMARK_DISC; break;
                            case primitive2d::TEXT_EMPHASISMARK_ACCENT: eFontEmphasisMark = EMPHASISMARK_ACCENT; break;
                        }

                        if( eFontEmphasisMark != EMPHASISMARK_NONE )
                        {
                            DBG_ASSERT( (pTCPP->getEmphasisMarkAbove() != pTCPP->getEmphasisMarkBelow()),
                                "DrawingLayer: Bad EmphasisMark position!" );
                            if( pTCPP->getEmphasisMarkAbove() )
                                eFontEmphasisMark |= EMPHASISMARK_POS_ABOVE;
                            else
                                eFontEmphasisMark |= EMPHASISMARK_POS_BELOW;
                            aFont.SetEmphasisMark( eFontEmphasisMark );
                        }

                        // set Relief attribute
                        FontRelief eFontRelief = RELIEF_NONE;
                        switch( pTCPP->getTextRelief() )
                        {
                            default:
                                DBG_WARNING1( "DrawingLayer: Unknown Relief style (%d)!", pTCPP->getTextRelief() );
                                // fall through
                            case primitive2d::TEXT_RELIEF_NONE:     eFontRelief = RELIEF_NONE; break;
                            case primitive2d::TEXT_RELIEF_EMBOSSED: eFontRelief = RELIEF_EMBOSSED; break;
                            case primitive2d::TEXT_RELIEF_ENGRAVED: eFontRelief = RELIEF_ENGRAVED; break;
                        }

                        if( eFontRelief != RELIEF_NONE )
                            aFont.SetRelief( eFontRelief );

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

                    // create transformed integer DXArray in view coordinate system
                    ::std::vector< sal_Int32 > aTransformedDXArray;

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

                        for(::std::vector< double >::const_iterator aStart(rTextCandidate.getDXArray().begin());
                            aStart != rTextCandidate.getDXArray().end(); aStart++)
                        {
                            aTransformedDXArray.push_back(basegfx::fround((*aStart) * 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 sal_uInt32 nOldLayoutMode(mpOutputDevice->GetLayoutMode());

                    if(rTextCandidate.getFontAttribute().getRTL())
                    {
                        sal_uInt32 nRTLLayoutMode(nOldLayoutMode & ~(TEXT_LAYOUT_COMPLEX_DISABLED|TEXT_LAYOUT_BIDI_STRONG));
                        nRTLLayoutMode |= TEXT_LAYOUT_BIDI_RTL|TEXT_LAYOUT_TEXTORIGIN_LEFT;
                        mpOutputDevice->SetLayoutMode(nRTLLayoutMode);
                    }

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

                    if(aTransformedDXArray.size())
                    {
                        mpOutputDevice->DrawTextArray(
                            aStartPoint,
                            rTextCandidate.getText(),
                            &(aTransformedDXArray[0]),
                            rTextCandidate.getTextPosition(),
                            rTextCandidate.getTextLength());
                    }
                    else
                    {
                        mpOutputDevice->DrawText(
                            aStartPoint,
                            rTextCandidate.getText(),
                            rTextCandidate.getTextPosition(),
                            rTextCandidate.getTextLength());
                    }

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

                    bPrimitiveAccepted = true;
                }
            }

            if(!bPrimitiveAccepted)
            {
                // let break down
                process(rTextCandidate.get2DDecomposition(getViewInformation2D()));
            }
        }

        // 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);

            static bool bCheckTrapezoidDecomposition(false);
            static bool bShowOutlinesThere(false);
            if(bCheckTrapezoidDecomposition)
            {
                // clip against discrete ViewPort
                const basegfx::B2DRange& rDiscreteViewport = getViewInformation2D().getDiscreteViewport();
                basegfx::B2DPolyPolygon aLocalPolyPolygon(basegfx::tools::clipPolygonOnRange(
                    aLocalPolygon, rDiscreteViewport, true, false));

                if(aLocalPolyPolygon.count())
                {
                    // subdivide
                    aLocalPolyPolygon = basegfx::tools::adaptiveSubdivideByDistance(
                        aLocalPolyPolygon, 0.5);

                    // trapezoidize
                    static double fLineWidth(2.0);
                    basegfx::B2DTrapezoidVector aB2DTrapezoidVector;
                    basegfx::tools::createLineTrapezoidFromB2DPolyPolygon(aB2DTrapezoidVector, aLocalPolyPolygon, fLineWidth);

                    const sal_uInt32 nCount(aB2DTrapezoidVector.size());

                    if(nCount)
                    {
                        basegfx::BColor aInvPolygonColor(aHairlineColor);
                        aInvPolygonColor.invert();

                        for(sal_uInt32 a(0); a < nCount; a++)
                        {
                            const basegfx::B2DPolygon aTempPolygon(aB2DTrapezoidVector[a].getB2DPolygon());

                            if(bShowOutlinesThere)
                            {
                                mpOutputDevice->SetFillColor(Color(aHairlineColor));
                                mpOutputDevice->SetLineColor();
                            }

                            mpOutputDevice->DrawPolygon(aTempPolygon);

                            if(bShowOutlinesThere)
                            {
                                mpOutputDevice->SetFillColor();
                                mpOutputDevice->SetLineColor(Color(aInvPolygonColor));
                                mpOutputDevice->DrawPolyLine(aTempPolygon, 0.0);
                            }
                        }
                    }
                }
            }
            else
            {
                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::tools::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::tools::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);
            static bool bTryTilingDirect = true;

            // #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.

            // ovveride static bool (for debug) and tiling is active
            if(bTryTilingDirect && rFillGraphicAttribute.getTiling())
            {
                // content is bitmap(ex)
                //
                // for SVG support, force decomposition when SVG is present. This will lead to use
                // the primitive representation of the svg directly.
                //
                // when graphic is animated, force decomposition to use the correct graphic, else
                // fill style will not be animated
                if(GRAPHIC_BITMAP == rFillGraphicAttribute.getGraphic().GetType()
                    && !rFillGraphicAttribute.getGraphic().getSvgData().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 neede 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());
                                static bool bEnablePreScaling(true);
                                const bool bPreScaled(bEnablePreScaling && 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(BMP_CONVERSION_24BIT);
                                    }

                                    aBitmapEx.Scale(aNeededBitmapSizePixel, BMP_SCALE_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::tools::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 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 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 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.get2DDecomposition(getViewInformation2D()));
            }
        }

        // 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 GRAPHIC_GDIMETAFILE:
                    {
                        // metafiles are potentially transparent, cannot optimize, not done
                        break;
                    }
                    case GRAPHIC_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 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
                                        // 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 wil 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::tools::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::tools::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: //GRAPHIC_NONE, GRAPHIC_DEFAULT
                    {
                        // empty graphic, we are done
                        bDone = true;
                        break;
                    }
                }
            }

            if(!bDone)
            {
                // use default decomposition
                process(rPolygonCandidate.get2DDecomposition(getViewInformation2D()));
            }
        }

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

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

                    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;

                        // 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);

                            // dump buffer to outdev
                            aBufferDevice.paint();
                        }
                        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().hasElements())
            {
                maBColorModifierStack.push(rModifiedCandidate.getColorModifier());
                process(rModifiedCandidate.getChildren());
                maBColorModifierStack.pop();
            }
        }

        // unified sub-transparence. Draw to VDev first.
        void VclProcessor2D::RenderUnifiedTransparencePrimitive2D(const primitive2d::UnifiedTransparencePrimitive2D& rTransCandidate)
        {
            static bool bForceToDecomposition(false);

            if(rTransCandidate.getChildren().hasElements())
            {
                if(bForceToDecomposition)
                {
                    // use decomposition
                    process(rTransCandidate.get2DDecomposition(getViewInformation2D()));
                }
                else
                {
                    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(primitive2d::getB2DRangeFromPrimitive2DSequence(rTransCandidate.getChildren(), getViewInformation2D()));
                        aRange.transform(maCurrentTransformation);
                        impBufferDevice aBufferDevice(*mpOutputDevice, aRange, true);

                        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().hasElements())
            {
                basegfx::B2DRange aRange(primitive2d::getB2DRangeFromPrimitive2DSequence(rTransCandidate.getChildren(), getViewInformation2D()));
                aRange.transform(maCurrentTransformation);
                impBufferDevice aBufferDevice(*mpOutputDevice, aRange, true);

                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);

            // proccess 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);

            // proccess decomposed content
            process(rPagePreviewCandidate.get2DDecomposition(getViewInformation2D()));

            // restore transformations
            updateViewInformation(aLastViewInformation2D);
        }

        // marker
        void VclProcessor2D::RenderMarkerArrayPrimitive2D(const primitive2d::MarkerArrayPrimitive2D& rMarkArrayCandidate)
        {
            static bool bCheckCompleteMarkerDecompose(false);
            if(bCheckCompleteMarkerDecompose)
            {
                process(rMarkArrayCandidate.get2DDecomposition(getViewInformation2D()));
                return;
            }

            // 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(std::vector< basegfx::B2DPoint >::const_iterator aIter(rPositions.begin()); aIter != rPositions.end(); aIter++)
                    {
                        const basegfx::B2DPoint aDiscreteTopLeft((maCurrentTransformation * (*aIter)) - 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(std::vector< basegfx::B2DPoint >::const_iterator aIter(rPositions.begin()); aIter != rPositions.end(); aIter++)
            {
                const basegfx::B2DPoint aViewPosition(maCurrentTransformation * (*aIter));
                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 deined 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::tools::applyLineDashing(rPolygonStrokeCandidate.getB2DPolygon(),
                        rStrokeAttribute.getDotDashArray(),
                        &aHairlinePolyPolygon, 0, 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 OuputDevice::DrawPolyLine directly; this will avoid buffering all
                        // decompositions in primtives (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());
                        }

                        bDone = true;
                    }
                }
            }

            if(!bDone)
            {
                // remeber 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.get2DDecomposition(getViewInformation2D()));

                // 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 Rectangle aRectangle(
                    (sal_Int32)floor(aRange.getMinX()), (sal_Int32)floor(aRange.getMinY()),
                    (sal_Int32)ceil(aRange.getMaxX()), (sal_Int32)ceil(aRange.getMaxY()));

                if(!aRectangle.IsEmpty())
                {
                    // try to paint EPS directly without fallback visualisation
                    const bool bEPSPaintedDirectly(mpOutputDevice->DrawEPS(
                        aRectangle.TopLeft(),
                        aRectangle.GetSize(),
                        rEpsPrimitive2D.getGfxLink(),
                        0));

                    if(!bEPSPaintedDirectly)
                    {
                        // use the decomposition which will correctly handle the
                        // fallback visualisation using full transformation (e.g. rotation)
                        process(rEpsPrimitive2D.get2DDecomposition(getViewInformation2D()));
                    }
                }
            }
        }

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

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

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

        void VclProcessor2D::adaptLineToFillDrawMode() const
        {
            const sal_uInt32 nOriginalDrawMode(mpOutputDevice->GetDrawMode());

            if(nOriginalDrawMode & (DRAWMODE_BLACKLINE|DRAWMODE_GRAYLINE|DRAWMODE_GHOSTEDLINE|DRAWMODE_WHITELINE|DRAWMODE_SETTINGSLINE))
            {
                sal_uInt32 nAdaptedDrawMode(nOriginalDrawMode);

                if(nOriginalDrawMode & DRAWMODE_BLACKLINE)
                {
                    nAdaptedDrawMode |= DRAWMODE_BLACKFILL;
                }
                else
                {
                    nAdaptedDrawMode &= ~DRAWMODE_BLACKFILL;
                }

                if(nOriginalDrawMode & DRAWMODE_GRAYLINE)
                {
                    nAdaptedDrawMode |= DRAWMODE_GRAYFILL;
                }
                else
                {
                    nAdaptedDrawMode &= ~DRAWMODE_GRAYFILL;
                }

                if(nOriginalDrawMode & DRAWMODE_GHOSTEDLINE)
                {
                    nAdaptedDrawMode |= DRAWMODE_GHOSTEDFILL;
                }
                else
                {
                    nAdaptedDrawMode &= ~DRAWMODE_GHOSTEDFILL;
                }

                if(nOriginalDrawMode & DRAWMODE_WHITELINE)
                {
                    nAdaptedDrawMode |= DRAWMODE_WHITEFILL;
                }
                else
                {
                    nAdaptedDrawMode &= ~DRAWMODE_WHITEFILL;
                }

                if(nOriginalDrawMode & DRAWMODE_SETTINGSLINE)
                {
                    nAdaptedDrawMode |= DRAWMODE_SETTINGSFILL;
                }
                else
                {
                    nAdaptedDrawMode &= ~DRAWMODE_SETTINGSFILL;
                }

                mpOutputDevice->SetDrawMode(nAdaptedDrawMode);
            }
        }

        void VclProcessor2D::adaptTextToFillDrawMode() const
        {
            const sal_uInt32 nOriginalDrawMode(mpOutputDevice->GetDrawMode());
            if(nOriginalDrawMode & (DRAWMODE_BLACKTEXT|DRAWMODE_GRAYTEXT|DRAWMODE_GHOSTEDTEXT|DRAWMODE_WHITETEXT|DRAWMODE_SETTINGSTEXT))
            {
                sal_uInt32 nAdaptedDrawMode(nOriginalDrawMode);

                if(nOriginalDrawMode & DRAWMODE_BLACKTEXT)
                {
                    nAdaptedDrawMode |= DRAWMODE_BLACKFILL;
                }
                else
                {
                    nAdaptedDrawMode &= ~DRAWMODE_BLACKFILL;
                }

                if(nOriginalDrawMode & DRAWMODE_GRAYTEXT)
                {
                    nAdaptedDrawMode |= DRAWMODE_GRAYFILL;
                }
                else
                {
                    nAdaptedDrawMode &= ~DRAWMODE_GRAYFILL;
                }

                if(nOriginalDrawMode & DRAWMODE_GHOSTEDTEXT)
                {
                    nAdaptedDrawMode |= DRAWMODE_GHOSTEDFILL;
                }
                else
                {
                    nAdaptedDrawMode &= ~DRAWMODE_GHOSTEDFILL;
                }

                if(nOriginalDrawMode & DRAWMODE_WHITETEXT)
                {
                    nAdaptedDrawMode |= DRAWMODE_WHITEFILL;
                }
                else
                {
                    nAdaptedDrawMode &= ~DRAWMODE_WHITEFILL;
                }

                if(nOriginalDrawMode & DRAWMODE_SETTINGSTEXT)
                {
                    nAdaptedDrawMode |= DRAWMODE_SETTINGSFILL;
                }
                else
                {
                    nAdaptedDrawMode &= ~DRAWMODE_SETTINGSFILL;
                }

                mpOutputDevice->SetDrawMode(nAdaptedDrawMode);
            }
        }

        //////////////////////////////////////////////////////////////////////////////
        // process support

        VclProcessor2D::VclProcessor2D(
            const geometry::ViewInformation2D& rViewInformation,
            OutputDevice& rOutDev)
        :   BaseProcessor2D(rViewInformation),
            mpOutputDevice(&rOutDev),
            maBColorModifierStack(),
            maCurrentTransformation(),
            maDrawinglayerOpt(),
            mnPolygonStrokePrimitive2D(0)
        {
            // set digit language, derived from SvtCTLOptions to have the correct
            // number display for arabic/hindi numerals
            const SvtCTLOptions aSvtCTLOptions;
            LanguageType eLang(LANGUAGE_SYSTEM);

            if(SvtCTLOptions::NUMERALS_HINDI == aSvtCTLOptions.GetCTLTextNumerals())
            {
                eLang = LANGUAGE_ARABIC_SAUDI_ARABIA;
            }
            else if(SvtCTLOptions::NUMERALS_ARABIC == aSvtCTLOptions.GetCTLTextNumerals())
            {
                eLang = LANGUAGE_ENGLISH;
            }
            else
            {
                eLang = (LanguageType)Application::GetSettings().GetLanguage();
            }

            rOutDev.SetDigitLanguage(eLang);
        }

        VclProcessor2D::~VclProcessor2D()
        {
        }
    } // end of namespace processor2d
} // end of namespace drawinglayer

//////////////////////////////////////////////////////////////////////////////
// eof