/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */


#include <comphelper/configuration.hxx>
#include <vcl/gdimtf.hxx>
#include <vcl/metaact.hxx>
#include <vcl/virdev.hxx>
#include <tools/poly.hxx>
#include "dxf2mtf.hxx"

#include <math.h>


sal_uInt64 DXF2GDIMetaFile::CountEntities(const DXFEntities & rEntities)
{
    const DXFBasicEntity * pBE;
    sal_uInt64 nRes;

    nRes=0;
    for (pBE=rEntities.pFirst; pBE!=nullptr; pBE=pBE->pSucc) nRes++;
    return nRes;
}

Color DXF2GDIMetaFile::ConvertColor(sal_uInt8 nColor) const
{
    return Color(
        pDXF->aPalette.GetRed( nColor ),
        pDXF->aPalette.GetGreen( nColor ),
        pDXF->aPalette.GetBlue( nColor ) );
}

tools::Long DXF2GDIMetaFile::GetEntityColor(const DXFBasicEntity & rE) const
{
    tools::Long nColor;

    nColor=rE.nColor;
    if (nColor==256) {
        if (rE.m_sLayer.getLength() < 2) {
            nColor=nParentLayerColor;
        } else {
            const DXFLayer * pLayer=pDXF->aTables.SearchLayer(rE.m_sLayer);
            if (pLayer!=nullptr) nColor=pLayer->nColor;
            else nColor=nParentLayerColor;
        }
    }
    else if (nColor==0) nColor=nBlockColor;
    return nColor;
}

DXFLineInfo DXF2GDIMetaFile::LTypeToDXFLineInfo(std::string_view rLineType) const
{
    const DXFLType * pLT;
    DXFLineInfo aDXFLineInfo;

    pLT = pDXF->aTables.SearchLType(rLineType);
    if (pLT==nullptr || pLT->nDashCount == 0) {
        aDXFLineInfo.eStyle = LineStyle::Solid;
    }
    else {
        aDXFLineInfo.eStyle = LineStyle::Dash;
        for (tools::Long i=0; i < (pLT->nDashCount); i++) {
            const double x = pLT->fDash[i] * pDXF->getGlobalLineTypeScale();
            if ( x >= 0.0 ) {
                if ( aDXFLineInfo.nDotCount == 0 ) {
                    aDXFLineInfo.nDotCount ++;
                    aDXFLineInfo.fDotLen = x;
                }
                else if ( aDXFLineInfo.fDotLen == x ) {
                    aDXFLineInfo.nDotCount ++;
                }
                else if ( aDXFLineInfo.nDashCount == 0 ) {
                    aDXFLineInfo.nDashCount ++;
                    aDXFLineInfo.fDashLen = x;
                }
                else if ( aDXFLineInfo.fDashLen == x ) {
                    aDXFLineInfo.nDashCount ++;
                }
                else {
                    // It is impossible to be converted.
                }
            }
            else {
                if ( aDXFLineInfo.fDistance == 0 ) {
                    aDXFLineInfo.fDistance = -1 * x;
                }
                else {
                    // It is impossible to be converted.
                }
            }

        }
    }

    return aDXFLineInfo;
}

DXFLineInfo DXF2GDIMetaFile::GetEntityDXFLineInfo(const DXFBasicEntity & rE)
{
    DXFLineInfo aDXFLineInfo;

    aDXFLineInfo.eStyle = LineStyle::Solid;
    aDXFLineInfo.nDashCount = 0;
    aDXFLineInfo.fDashLen = 0;
    aDXFLineInfo.nDotCount = 0;
    aDXFLineInfo.fDotLen = 0;
    aDXFLineInfo.fDistance = 0;

    if (rE.m_sLineType == "BYLAYER") {
        if (rE.m_sLayer.getLength() < 2) {
            aDXFLineInfo=aParentLayerDXFLineInfo;
        } else {
            const DXFLayer * pLayer=pDXF->aTables.SearchLayer(rE.m_sLayer);
            if (pLayer!=nullptr) {
                aDXFLineInfo = LTypeToDXFLineInfo(pLayer->m_sLineType);
            }
            else aDXFLineInfo=aParentLayerDXFLineInfo;
        }
    }
    else if (rE.m_sLineType == "BYBLOCK") {
        aDXFLineInfo=aBlockDXFLineInfo;
    }
    else {
        aDXFLineInfo = LTypeToDXFLineInfo(rE.m_sLineType);
    }
    return aDXFLineInfo;
}


bool DXF2GDIMetaFile::SetLineAttribute(const DXFBasicEntity & rE)
{
    tools::Long nColor;
    Color aColor;

    nColor=GetEntityColor(rE);
    if (nColor<0) return false;
    aColor=ConvertColor(static_cast<sal_uInt8>(nColor));

    if (aActLineColor!=aColor) {
        aActLineColor = aColor;
        pVirDev->SetLineColor( aActLineColor );
    }

    if (aActFillColor!=COL_TRANSPARENT) {
        aActFillColor = COL_TRANSPARENT;
        pVirDev->SetFillColor();
    }
    return true;
}


bool DXF2GDIMetaFile::SetAreaAttribute(const DXFBasicEntity & rE)
{
    tools::Long nColor;
    Color aColor;

    nColor=GetEntityColor(rE);
    if (nColor<0) return false;
    aColor=ConvertColor(static_cast<sal_uInt8>(nColor));

    if (aActLineColor!=aColor) {
        aActLineColor = aColor;
        pVirDev->SetLineColor( aActLineColor );
    }

    if ( aActFillColor == COL_TRANSPARENT || aActFillColor != aColor) {
        aActFillColor = aColor;
        pVirDev->SetFillColor( aActFillColor );
    }
    return true;
}


bool DXF2GDIMetaFile::SetFontAttribute(const DXFBasicEntity & rE, short nAngle, sal_uInt16 nHeight)
{
    tools::Long nColor;
    Color aColor;
    vcl::Font aFont;

    nAngle=-nAngle;
    while (nAngle>=3600) nAngle-=3600;
    while (nAngle<0) nAngle+=3600;

    nColor=GetEntityColor(rE);
    if (nColor<0) return false;
    aColor=ConvertColor(static_cast<sal_uInt8>(nColor));

    aFont.SetColor(aColor);
    aFont.SetTransparent(true);
    aFont.SetFamily(FAMILY_SWISS);
    aFont.SetFontSize(Size(0,nHeight));
    aFont.SetAlignment(ALIGN_BASELINE);
    aFont.SetOrientation(Degree10(nAngle));
    if (aActFont!=aFont) {
        aActFont=std::move(aFont);
        pVirDev->SetFont(aActFont);
    }

    return true;
}


void DXF2GDIMetaFile::DrawLineEntity(const DXFLineEntity & rE, const DXFTransform & rTransform)
{
    if (!SetLineAttribute(rE))
        return;

    Point aP0,aP1;
    rTransform.Transform(rE.aP0,aP0);
    rTransform.Transform(rE.aP1,aP1);

    DXFLineInfo aDXFLineInfo=GetEntityDXFLineInfo(rE);
    LineInfo aLineInfo;
    aLineInfo = rTransform.Transform(aDXFLineInfo);

    pVirDev->DrawLine(aP0,aP1,aLineInfo);
    if (rE.fThickness!=0) {
        Point aP2,aP3;
        rTransform.Transform(rE.aP0+DXFVector(0,0,rE.fThickness),aP2);
        rTransform.Transform(rE.aP1+DXFVector(0,0,rE.fThickness),aP3);
        DrawLine(aP2,aP3);
        DrawLine(aP0,aP2);
        DrawLine(aP1,aP3);
    }
}


void DXF2GDIMetaFile::DrawPointEntity(const DXFPointEntity & rE, const DXFTransform & rTransform)
{

    if (SetLineAttribute(rE)) {
        Point aP0;
        rTransform.Transform(rE.aP0,aP0);
        if (rE.fThickness==0) pVirDev->DrawPixel(aP0);
        else {
            Point aP1;
            rTransform.Transform(rE.aP0+DXFVector(0,0,rE.fThickness),aP1);
            DrawLine(aP0,aP1);
        }
    }
}


void DXF2GDIMetaFile::DrawCircleEntity(const DXFCircleEntity & rE, const DXFTransform & rTransform)
{
    double frx,fry;
    sal_uInt16 nPoints,i;
    DXFVector aC;

    if (!SetLineAttribute(rE)) return;
    rTransform.Transform(rE.aP0,aC);
    if (rE.fThickness==0 && rTransform.TransCircleToEllipse(rE.fRadius,frx,fry)) {
        pVirDev->DrawEllipse(
            tools::Rectangle(static_cast<tools::Long>(aC.fx-frx+0.5),static_cast<tools::Long>(aC.fy-fry+0.5),
                      static_cast<tools::Long>(aC.fx+frx+0.5),static_cast<tools::Long>(aC.fy+fry+0.5)));
    }
    else {
        double fAng;
        nPoints=OptPointsPerCircle;
        tools::Polygon aPoly(nPoints);
        for (i=0; i<nPoints; i++) {
            fAng=2*M_PI/static_cast<double>(nPoints-1)*static_cast<double>(i);
            rTransform.Transform(
                rE.aP0+DXFVector(rE.fRadius*cos(fAng),rE.fRadius*sin(fAng),0),
                aPoly[i]
            );
        }
        pVirDev->DrawPolyLine(aPoly);
        if (rE.fThickness!=0) {
            tools::Polygon aPoly2(nPoints);
            for (i=0; i<nPoints; i++) {
                fAng=2*M_PI/static_cast<double>(nPoints-1)*static_cast<double>(i);
                rTransform.Transform(
                    rE.aP0+DXFVector(rE.fRadius*cos(fAng),rE.fRadius*sin(fAng),rE.fThickness),
                    aPoly2[i]
                );

            }
            pVirDev->DrawPolyLine(aPoly2);
            for (i=0; i<nPoints-1; i++) DrawLine(aPoly[i],aPoly2[i]);
        }
    }
}

void DXF2GDIMetaFile::DrawLine(const Point& rA, const Point& rB)
{
    if (comphelper::IsFuzzing())
        return;
    GDIMetaFile* pMetaFile = pVirDev->GetConnectMetaFile();
    assert(pMetaFile);
    //use AddAction instead of OutputDevice::DrawLine so that we can explicitly share
    //the aDefaultLineInfo between the MetaLineActions to reduce memory use
    pMetaFile->AddAction(new MetaLineAction(rA, rB, aDefaultLineInfo));
}

void DXF2GDIMetaFile::DrawArcEntity(const DXFArcEntity & rE, const DXFTransform & rTransform)
{
    double frx,fry;
    sal_uInt16 nPoints,i;
    DXFVector aC;

    if (!SetLineAttribute(rE)) return;
    double fA1=rE.fStart;
    double fdA=rE.fEnd-fA1;
    fdA = fmod(fdA, 360.0);
    if (fdA<=0) fdA+=360.0;
    rTransform.Transform(rE.aP0,aC);
    if (rE.fThickness==0 && fdA>5.0 && rTransform.TransCircleToEllipse(rE.fRadius,frx,fry)) {
        DXFVector aVS(cos(basegfx::deg2rad(fA1)),sin(basegfx::deg2rad(fA1)),0.0);
        aVS*=rE.fRadius;
        aVS+=rE.aP0;
        DXFVector aVE(cos(basegfx::deg2rad(fA1+fdA)),sin(basegfx::deg2rad(fA1+fdA)),0.0);
        aVE*=rE.fRadius;
        aVE+=rE.aP0;
        Point aPS,aPE;
        if (rTransform.Mirror()) {
            rTransform.Transform(aVS,aPS);
            rTransform.Transform(aVE,aPE);
        }
        else {
            rTransform.Transform(aVS,aPE);
            rTransform.Transform(aVE,aPS);
        }
        pVirDev->DrawArc(
            tools::Rectangle(static_cast<tools::Long>(aC.fx-frx+0.5),static_cast<tools::Long>(aC.fy-fry+0.5),
                      static_cast<tools::Long>(aC.fx+frx+0.5),static_cast<tools::Long>(aC.fy+fry+0.5)),
            aPS,aPE
        );
    }
    else {
        double fAng;
        nPoints=static_cast<sal_uInt16>(fdA/360.0*static_cast<double>(OptPointsPerCircle)+0.5);
        if (nPoints<2) nPoints=2;
        tools::Polygon aPoly(nPoints);
        for (i=0; i<nPoints; i++) {
            fAng=basegfx::deg2rad( fA1 + fdA/static_cast<double>(nPoints-1)*static_cast<double>(i) );
            rTransform.Transform(
                rE.aP0+DXFVector(rE.fRadius*cos(fAng),rE.fRadius*sin(fAng),0),
                aPoly[i]
            );
        }
        pVirDev->DrawPolyLine(aPoly);
        if (rE.fThickness!=0) {
            tools::Polygon aPoly2(nPoints);
            for (i=0; i<nPoints; i++) {
                fAng=basegfx::deg2rad( fA1 + fdA/static_cast<double>(nPoints-1)*static_cast<double>(i) );
                rTransform.Transform(
                    rE.aP0+DXFVector(rE.fRadius*cos(fAng),rE.fRadius*sin(fAng),rE.fThickness),
                    aPoly2[i]
                );
            }
            pVirDev->DrawPolyLine(aPoly2);
            for (i=0; i<nPoints; i++)
                DrawLine(aPoly[i], aPoly2[i]);
        }
    }
}

void DXF2GDIMetaFile::DrawTraceEntity(const DXFTraceEntity & rE, const DXFTransform & rTransform)
{
    if (!SetLineAttribute(rE))
        return;

    tools::Polygon aPoly(4);
    rTransform.Transform(rE.aP0,aPoly[0]);
    rTransform.Transform(rE.aP1,aPoly[1]);
    rTransform.Transform(rE.aP3,aPoly[2]);
    rTransform.Transform(rE.aP2,aPoly[3]);
    pVirDev->DrawPolygon(aPoly);
    if (rE.fThickness!=0) {
        sal_uInt16 i;
        tools::Polygon aPoly2(4);
        DXFVector aVAdd(0,0,rE.fThickness);
        rTransform.Transform(rE.aP0+aVAdd,aPoly2[0]);
        rTransform.Transform(rE.aP1+aVAdd,aPoly2[1]);
        rTransform.Transform(rE.aP3+aVAdd,aPoly2[2]);
        rTransform.Transform(rE.aP2+aVAdd,aPoly2[3]);
        pVirDev->DrawPolygon(aPoly2);
        for (i=0; i<4; i++) DrawLine(aPoly[i],aPoly2[i]);
    }
}


void DXF2GDIMetaFile::DrawSolidEntity(const DXFSolidEntity & rE, const DXFTransform & rTransform)
{
    if (!SetAreaAttribute(rE))
        return;

    sal_uInt16 nN;
    if (rE.aP2==rE.aP3) nN=3; else nN=4;
    tools::Polygon aPoly(nN);
    rTransform.Transform(rE.aP0,aPoly[0]);
    rTransform.Transform(rE.aP1,aPoly[1]);
    rTransform.Transform(rE.aP3,aPoly[2]);
    if (nN>3) rTransform.Transform(rE.aP2,aPoly[3]);
    pVirDev->DrawPolygon(aPoly);
    if (rE.fThickness==0)        return;

    tools::Polygon aPoly2(nN);
    DXFVector aVAdd(0,0,rE.fThickness);
    rTransform.Transform(rE.aP0+aVAdd,aPoly2[0]);
    rTransform.Transform(rE.aP1+aVAdd,aPoly2[1]);
    rTransform.Transform(rE.aP3+aVAdd,aPoly2[2]);
    if (nN>3) rTransform.Transform(rE.aP2+aVAdd,aPoly2[3]);
    pVirDev->DrawPolygon(aPoly2);
    if (SetLineAttribute(rE)) {
        sal_uInt16 i;
        for (i=0; i<nN; i++) DrawLine(aPoly[i],aPoly2[i]);
    }
}


void DXF2GDIMetaFile::DrawTextEntity(const DXFTextEntity & rE, const DXFTransform & rTransform)
{
    DXFVector aV;
    double fA;
    sal_uInt16 nHeight;
    short nAng;
    DXFTransform aT( DXFTransform(rE.fXScale,rE.fHeight,1.0,rE.fRotAngle,rE.aP0), rTransform );
    aT.TransDir(DXFVector(0,1,0),aV);
    nHeight=static_cast<sal_uInt16>(aV.Abs()+0.5);
    fA=aT.CalcRotAngle();
    nAng=static_cast<short>(fA*10.0+0.5);
    aT.TransDir(DXFVector(1,0,0),aV);
    if ( SetFontAttribute( rE,nAng, nHeight ) )
    {
        OUString const aUString(pDXF->ToOUString(rE.m_sText));
        Point aPt;
        aT.Transform( DXFVector( 0, 0, 0 ), aPt );
        pVirDev->DrawText( aPt, aUString );
    }
}


void DXF2GDIMetaFile::DrawInsertEntity(const DXFInsertEntity & rE, const DXFTransform & rTransform)
{
    const DXFBlock * pB;
    pB=pDXF->aBlocks.Search(rE.m_sName);
    if (pB==nullptr)
        return;

    DXFTransform aDXFTransform1(1.0,1.0,1.0,DXFVector(0.0,0.0,0.0)-pB->aBasePoint);
    DXFTransform aDXFTransform2(rE.fXScale,rE.fYScale,rE.fZScale,rE.fRotAngle,rE.aP0);
    DXFTransform aT(
        DXFTransform( aDXFTransform1, aDXFTransform2 ),
        rTransform
    );
    tools::Long nSavedBlockColor, nSavedParentLayerColor;
    DXFLineInfo aSavedBlockDXFLineInfo, aSavedParentLayerDXFLineInfo;
    nSavedBlockColor=nBlockColor;
    nSavedParentLayerColor=nParentLayerColor;
    aSavedBlockDXFLineInfo=aBlockDXFLineInfo;
    aSavedParentLayerDXFLineInfo=aParentLayerDXFLineInfo;
    nBlockColor=GetEntityColor(rE);
    aBlockDXFLineInfo=GetEntityDXFLineInfo(rE);
    if (rE.m_sLayer.getLength() > 1) {
        DXFLayer * pLayer=pDXF->aTables.SearchLayer(rE.m_sLayer);
        if (pLayer!=nullptr) {
            nParentLayerColor=pLayer->nColor;
            aParentLayerDXFLineInfo = LTypeToDXFLineInfo(pLayer->m_sLineType);
        }
    }
    DrawEntities(*pB,aT);
    aBlockDXFLineInfo=aSavedBlockDXFLineInfo;
    aParentLayerDXFLineInfo=aSavedParentLayerDXFLineInfo;
    nBlockColor=nSavedBlockColor;
    nParentLayerColor=nSavedParentLayerColor;
}


void DXF2GDIMetaFile::DrawAttribEntity(const DXFAttribEntity & rE, const DXFTransform & rTransform)
{
    if ((rE.nAttrFlags&1)!=0)
        return;

    DXFVector aV;
    double fA;
    sal_uInt16 nHeight;
    short nAng;
    DXFTransform aT( DXFTransform( rE.fXScale, rE.fHeight, 1.0, rE.fRotAngle, rE.aP0 ), rTransform );
    aT.TransDir(DXFVector(0,1,0),aV);
    nHeight=static_cast<sal_uInt16>(aV.Abs()+0.5);
    fA=aT.CalcRotAngle();
    nAng=static_cast<short>(fA*10.0+0.5);
    aT.TransDir(DXFVector(1,0,0),aV);
    if (SetFontAttribute(rE,nAng,nHeight))
    {
        OUString const aUString(pDXF->ToOUString(rE.m_sText));
        Point aPt;
        aT.Transform( DXFVector( 0, 0, 0 ), aPt );
        pVirDev->DrawText( aPt, aUString );
    }
}


void DXF2GDIMetaFile::DrawPolyLineEntity(const DXFPolyLineEntity & rE, const DXFTransform & rTransform)
{
    sal_uInt16 i,nPolySize;
    const DXFBasicEntity * pBE;

    nPolySize=0;
    pBE=rE.pSucc;
    while (pBE!=nullptr && pBE->eType==DXF_VERTEX) {
        nPolySize++;
        pBE=pBE->pSucc;
    }
    if (nPolySize<2)
        return;
    tools::Polygon aPoly(nPolySize);
    pBE=rE.pSucc;
    for (i=0; i<nPolySize; i++) {
        rTransform.Transform(static_cast<const DXFVertexEntity*>(pBE)->aP0,aPoly[i]);
        pBE=pBE->pSucc;
    }

    if (!SetLineAttribute(rE))
        return;

    if ((rE.nFlags&1)!=0) pVirDev->DrawPolygon(aPoly);
    else pVirDev->DrawPolyLine(aPoly);
    if (rE.fThickness==0)
        return;

    tools::Polygon aPoly2(nPolySize);
    pBE=rE.pSucc;
    for (i=0; i<nPolySize; i++) {
        rTransform.Transform(
           (static_cast<const DXFVertexEntity*>(pBE)->aP0)+DXFVector(0,0,rE.fThickness),
           aPoly2[i]
        );
        pBE=pBE->pSucc;
    }
    if ((rE.nFlags&1)!=0) pVirDev->DrawPolygon(aPoly2);
    else pVirDev->DrawPolyLine(aPoly2);
    for (i=0; i<nPolySize; i++) DrawLine(aPoly[i],aPoly2[i]);
}

void DXF2GDIMetaFile::DrawLWPolyLineEntity(const DXFLWPolyLineEntity & rE, const DXFTransform & rTransform )
{
    sal_Int32 nPolySize = rE.aP.size();
    if (!nPolySize)
        return;

    tools::Polygon aPoly( static_cast<sal_uInt16>(nPolySize));
    for (sal_Int32 i = 0; i < nPolySize; ++i)
    {
        rTransform.Transform( rE.aP[ static_cast<sal_uInt16>(i) ], aPoly[ static_cast<sal_uInt16>(i) ] );
    }
    if ( SetLineAttribute( rE ) )
    {
        if ( ( rE.nFlags & 1 ) != 0 )
            pVirDev->DrawPolygon( aPoly );
        else
            pVirDev->DrawPolyLine( aPoly );
    }
}

void DXF2GDIMetaFile::DrawHatchEntity(const DXFHatchEntity & rE, const DXFTransform & rTransform )
{
    if (rE.aBoundaryPathData.empty())
        return;

    SetAreaAttribute( rE );
    tools::PolyPolygon aPolyPoly;
    for (const DXFBoundaryPathData& rPathData : rE.aBoundaryPathData)
    {
        std::vector< Point > aPtAry;
        if ( rPathData.bIsPolyLine )
        {
            for (const auto& a : rPathData.aP)
            {
                Point aPt;
                rTransform.Transform(a, aPt);
                aPtAry.push_back( aPt );
            }
        }
        else
        {
            for ( auto& rEdge : rPathData.aEdges )
            {
                const DXFEdgeType* pEdge = rEdge.get();
                switch( pEdge->nEdgeType )
                {
                    case 1 :
                    {
                        Point aPt;
                        rTransform.Transform( static_cast<const DXFEdgeTypeLine*>(pEdge)->aStartPoint, aPt );
                        aPtAry.push_back( aPt );
                        rTransform.Transform( static_cast<const DXFEdgeTypeLine*>(pEdge)->aEndPoint, aPt );
                        aPtAry.push_back( aPt );
                    }
                    break;
                    case 2 :
                    case 3 :
                    case 4 :
                    break;
                }
            }
        }
        sal_uInt16 i, nSize = static_cast<sal_uInt16>(aPtAry.size());
        if ( nSize )
        {
            tools::Polygon aPoly( nSize );
            for ( i = 0; i < nSize; i++ )
                aPoly[ i ] = aPtAry[ i ];
            aPolyPoly.Insert( aPoly );
        }
    }
    if ( aPolyPoly.Count() )
        pVirDev->DrawPolyPolygon( aPolyPoly );
}

void DXF2GDIMetaFile::Draw3DFaceEntity(const DXF3DFaceEntity & rE, const DXFTransform & rTransform)
{
    sal_uInt16 nN,i;
    if (!SetLineAttribute(rE))
        return;

    if (rE.aP2==rE.aP3) nN=3; else nN=4;
    tools::Polygon aPoly(nN);
    rTransform.Transform(rE.aP0,aPoly[0]);
    rTransform.Transform(rE.aP1,aPoly[1]);
    rTransform.Transform(rE.aP2,aPoly[2]);
    if (nN>3) rTransform.Transform(rE.aP3,aPoly[3]);
    if ((rE.nIEFlags&0x0f)==0) pVirDev->DrawPolygon(aPoly);
    else {
        for (i=0; i<nN; i++) {
            if ( (rE.nIEFlags & (static_cast<tools::Long>(1)<<i)) == 0 ) {
                DrawLine(aPoly[i],aPoly[(i+1)%nN]);
            }
        }
    }
}

void DXF2GDIMetaFile::DrawDimensionEntity(const DXFDimensionEntity & rE, const DXFTransform & rTransform)
{
    const DXFBlock * pB;
    pB=pDXF->aBlocks.Search(rE.m_sPseudoBlock);
    if (pB==nullptr)
        return;

    DXFTransform aT(
        DXFTransform(1.0,1.0,1.0,DXFVector(0.0,0.0,0.0)-pB->aBasePoint),
        rTransform
    );
    tools::Long nSavedBlockColor, nSavedParentLayerColor;
    DXFLineInfo aSavedBlockDXFLineInfo, aSavedParentLayerDXFLineInfo;
    nSavedBlockColor=nBlockColor;
    nSavedParentLayerColor=nParentLayerColor;
    aSavedBlockDXFLineInfo=aBlockDXFLineInfo;
    aSavedParentLayerDXFLineInfo=aParentLayerDXFLineInfo;
    nBlockColor=GetEntityColor(rE);
    aBlockDXFLineInfo=GetEntityDXFLineInfo(rE);
    if (rE.m_sLayer.getLength() > 1) {
        DXFLayer * pLayer=pDXF->aTables.SearchLayer(rE.m_sLayer);
        if (pLayer!=nullptr) {
            nParentLayerColor=pLayer->nColor;
            aParentLayerDXFLineInfo = LTypeToDXFLineInfo(pLayer->m_sLineType);
        }
    }
    DrawEntities(*pB,aT);
    aBlockDXFLineInfo=aSavedBlockDXFLineInfo;
    aParentLayerDXFLineInfo=aSavedParentLayerDXFLineInfo;
    nBlockColor=nSavedBlockColor;
    nParentLayerColor=nSavedParentLayerColor;
}


void DXF2GDIMetaFile::DrawEntities(const DXFEntities & rEntities,
                                   const DXFTransform & rTransform)
{
    if (rEntities.mbBeingDrawn)
        return;
    rEntities.mbBeingDrawn = true;

    DXFTransform aET;
    const DXFTransform * pT;

    const DXFBasicEntity * pE=rEntities.pFirst;

    while (pE!=nullptr && bStatus) {
        if (pE->nSpace==0) {
            if (pE->aExtrusion.fz==1.0) {
                pT=&rTransform;
            }
            else {
                aET=DXFTransform(DXFTransform(pE->aExtrusion),rTransform);
                pT=&aET;
            }
            switch (pE->eType) {
            case DXF_LINE:
                DrawLineEntity(static_cast<const DXFLineEntity&>(*pE),*pT);
                break;
            case DXF_POINT:
                DrawPointEntity(static_cast<const DXFPointEntity&>(*pE),*pT);
                break;
            case DXF_CIRCLE:
                DrawCircleEntity(static_cast<const DXFCircleEntity&>(*pE),*pT);
                break;
            case DXF_ARC:
                DrawArcEntity(static_cast<const DXFArcEntity&>(*pE),*pT);
                break;
            case DXF_TRACE:
                DrawTraceEntity(static_cast<const DXFTraceEntity&>(*pE),*pT);
                break;
            case DXF_SOLID:
                DrawSolidEntity(static_cast<const DXFSolidEntity&>(*pE),*pT);
                break;
            case DXF_TEXT:
                DrawTextEntity(static_cast<const DXFTextEntity&>(*pE),*pT);
                break;
            case DXF_INSERT:
                DrawInsertEntity(static_cast<const DXFInsertEntity&>(*pE),*pT);
                break;
            case DXF_ATTRIB:
                DrawAttribEntity(static_cast<const DXFAttribEntity&>(*pE),*pT);
                break;
            case DXF_POLYLINE:
                DrawPolyLineEntity(static_cast<const DXFPolyLineEntity&>(*pE),*pT);
                break;
            case DXF_LWPOLYLINE :
                DrawLWPolyLineEntity(static_cast<const DXFLWPolyLineEntity&>(*pE), *pT);
                break;
            case DXF_HATCH :
                DrawHatchEntity(static_cast<const DXFHatchEntity&>(*pE), *pT);
                break;
            case DXF_3DFACE:
                Draw3DFaceEntity(static_cast<const DXF3DFaceEntity&>(*pE),*pT);
                break;
            case DXF_DIMENSION:
                DrawDimensionEntity(static_cast<const DXFDimensionEntity&>(*pE),*pT);
                break;
            default:
                break;  // four other values not handled -Wall
            }
        }
        pE=pE->pSucc;
    }

    rEntities.mbBeingDrawn = false;
}


DXF2GDIMetaFile::DXF2GDIMetaFile()
    : pVirDev(nullptr)
    , pDXF(nullptr)
    , bStatus(false)
    , OptPointsPerCircle(0)
    , nMinPercent(0)
    , nMaxPercent(0)
    , nLastPercent(0)
    , nMainEntitiesCount(0)
    , nBlockColor(0)
    , nParentLayerColor(0)
{
}


DXF2GDIMetaFile::~DXF2GDIMetaFile()
{
}


bool DXF2GDIMetaFile::Convert(const DXFRepresentation & rDXF, GDIMetaFile & rMTF, sal_uInt16 nminpercent, sal_uInt16 nmaxpercent)
{
    double fWidth,fHeight,fScale(0.0);
    DXFTransform aTransform;
    Size aPrefSize;
    const DXFLayer * pLayer;
    const DXFVPort * pVPort;

    pVirDev = VclPtr<VirtualDevice>::Create();
    pDXF    = &rDXF;
    bStatus = true;

    OptPointsPerCircle=50;

    nMinPercent=nminpercent;
    nMaxPercent=nmaxpercent;
    nLastPercent=nMinPercent;
    nMainEntitiesCount=CountEntities(pDXF->aEntities);

    nBlockColor=7;
    aBlockDXFLineInfo.eStyle = LineStyle::Solid;
    aBlockDXFLineInfo.nDashCount = 0;
    aBlockDXFLineInfo.fDashLen = 0;
    aBlockDXFLineInfo.nDotCount = 0;
    aBlockDXFLineInfo.fDotLen = 0;
    aBlockDXFLineInfo.fDistance = 0;

    pLayer=pDXF->aTables.SearchLayer("0");
    if (pLayer!=nullptr) {
        nParentLayerColor=pLayer->nColor & 0xff;
        aParentLayerDXFLineInfo = LTypeToDXFLineInfo(pLayer->m_sLineType);
    }
    else {
        nParentLayerColor=7;
        aParentLayerDXFLineInfo.eStyle = LineStyle::Solid;
        aParentLayerDXFLineInfo.nDashCount = 0;
        aParentLayerDXFLineInfo.fDashLen = 0;
        aParentLayerDXFLineInfo.nDotCount = 0;
        aParentLayerDXFLineInfo.fDotLen = 0;
        aParentLayerDXFLineInfo.fDistance = 0;
    }

    pVirDev->EnableOutput(false);
    if (!comphelper::IsFuzzing()) // for fuzzing don't bother recording the drawing
        rMTF.Record(pVirDev);

    aActLineColor = pVirDev->GetLineColor();
    aActFillColor = pVirDev->GetFillColor();
    aActFont = pVirDev->GetFont();

    pVPort=pDXF->aTables.SearchVPort("*ACTIVE");
    if (pVPort!=nullptr) {
        if (pVPort->aDirection.fx==0 && pVPort->aDirection.fy==0)
            pVPort=nullptr;
    }

    if (pVPort==nullptr) {
        if (pDXF->aBoundingBox.bEmpty)
            bStatus=false;
        else {
            fWidth=pDXF->aBoundingBox.fMaxX-pDXF->aBoundingBox.fMinX;
            fHeight=pDXF->aBoundingBox.fMaxY-pDXF->aBoundingBox.fMinY;
            if (fWidth<=0 || fHeight<=0) {
                bStatus=false;
            }
            else {
                if (fWidth>fHeight)
                    fScale=10000.0/fWidth;
                else
                    fScale=10000.0/fHeight;
                aTransform=DXFTransform(fScale,-fScale,fScale,
                                        DXFVector(-pDXF->aBoundingBox.fMinX*fScale,
                                                   pDXF->aBoundingBox.fMaxY*fScale,
                                                  -pDXF->aBoundingBox.fMinZ*fScale));
            }
            aPrefSize.setWidth(static_cast<tools::Long>(fWidth*fScale+1.5) );
            aPrefSize.setHeight(static_cast<tools::Long>(fHeight*fScale+1.5) );
        }
    }
    else {
        fHeight=pVPort->fHeight;
        fWidth=fHeight*pVPort->fAspectRatio;
        if (fWidth<=0 || fHeight<=0) {
            bStatus=false;
        } else {
            if (fWidth>fHeight)
                fScale=10000.0/fWidth;
            else
                fScale=10000.0/fHeight;
            aTransform=DXFTransform(
                DXFTransform(pVPort->aDirection,pVPort->aTarget),
                DXFTransform(
                    DXFTransform(1.0,-1.0,1.0,DXFVector(fWidth/2-pVPort->fCenterX,fHeight/2+pVPort->fCenterY,0)),
                    DXFTransform(fScale,fScale,fScale,DXFVector(0,0,0))
                )
            );
        }
        aPrefSize.setWidth(static_cast<tools::Long>(fWidth*fScale+1.5) );
        aPrefSize.setHeight(static_cast<tools::Long>(fHeight*fScale+1.5) );
    }

    if (bStatus)
        DrawEntities(pDXF->aEntities,aTransform);

    rMTF.Stop();

    if ( bStatus )
    {
        rMTF.SetPrefSize( aPrefSize );
        // simply set map mode to 1/100-mm (1/10-mm) if the graphic
        // does not get not too small (<0.5cm)
        if( ( aPrefSize.Width() < 500 ) && ( aPrefSize.Height() < 500 ) )
            rMTF.SetPrefMapMode( MapMode( MapUnit::Map10thMM ) );
        else
            rMTF.SetPrefMapMode( MapMode( MapUnit::Map100thMM ) );
    }

    pVirDev.disposeAndClear();
    return bStatus;
}


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