path: root/vcl/unx/generic/print/common_gfx.cxx

/* -*- 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 <sal/config.h>

#include "psputil.hxx"
#include "glyphset.hxx"

#include <unx/printergfx.hxx>
#include <unx/printerjob.hxx>
#include <unx/fontmanager.hxx>
#include <strhelper.hxx>
#include <printerinfomanager.hxx>

#include <tools/color.hxx>
#include <tools/poly.hxx>
#include <tools/stream.hxx>
#include <o3tl/string_view.hxx>

using namespace psp ;

const sal_Int32 nMaxTextColumn = 80;

GraphicsStatus::GraphicsStatus() :
        maEncoding(RTL_TEXTENCODING_DONTKNOW),
        mbArtItalic( false ),
        mbArtBold( false ),
        mnTextHeight( 0 ),
        mnTextWidth( 0 ),
        mfLineWidth( -1 )
{
}

/*
 * non graphics routines
 */

void
PrinterGfx::Init (PrinterJob &rPrinterJob)
{
    mpPageBody   = rPrinterJob.GetCurrentPageBody ();
    mnDepth      = rPrinterJob.GetDepth ();
    mnPSLevel    = rPrinterJob.GetPostscriptLevel ();
    mbColor      = rPrinterJob.IsColorPrinter ();

    mnDpi = rPrinterJob.GetResolution();
    rPrinterJob.GetScale (mfScaleX, mfScaleY);
    const PrinterInfo& rInfo( PrinterInfoManager::get().getPrinterInfo( rPrinterJob.GetPrinterName() ) );
    mbUploadPS42Fonts = rInfo.m_pParser && rInfo.m_pParser->isType42Capable();
}

void
PrinterGfx::Init (const JobData& rData)
{
    mpPageBody      = nullptr;
    mnDepth         = rData.m_nColorDepth;
    mnPSLevel       = rData.m_nPSLevel ? rData.m_nPSLevel : (rData.m_pParser ? rData.m_pParser->getLanguageLevel() : 2 );
    mbColor         = rData.m_nColorDevice ? ( rData.m_nColorDevice != -1 ) : ( rData.m_pParser == nullptr || rData.m_pParser->isColorDevice() );
    int nRes = rData.m_aContext.getRenderResolution();
    mnDpi           = nRes;
    mfScaleX        = 72.0 / static_cast<double>(mnDpi);
    mfScaleY        = 72.0 / static_cast<double>(mnDpi);
    const PrinterInfo& rInfo( PrinterInfoManager::get().getPrinterInfo( rData.m_aPrinterName ) );
    mbUploadPS42Fonts = rInfo.m_pParser && rInfo.m_pParser->isType42Capable();
}


PrinterGfx::PrinterGfx()
    : mfScaleX(0.0)
    , mfScaleY(0.0)
    , mnDpi(0)
    , mnDepth(0)
    , mnPSLevel(0)
    , mbColor(false)
    , mbUploadPS42Fonts(false)
    , mpPageBody(nullptr)
    , mnFontID(0)
    , mnTextAngle(0)
    , mbTextVertical(false)
    , mrFontMgr(PrintFontManager::get())
    , maFillColor(0xff,0,0)
    , maTextColor(0,0,0)
    , maLineColor(0, 0xff, 0)
{
    maVirtualStatus.mfLineWidth = 1.0;
    maVirtualStatus.mnTextHeight = 12;
    maVirtualStatus.mnTextWidth = 0;

    maGraphicsStack.emplace_back( );
}

PrinterGfx::~PrinterGfx()
{
}

void
PrinterGfx::Clear()
{
    mpPageBody                      = nullptr;
    mnFontID                        = 0;
    maVirtualStatus                 = GraphicsStatus();
    maVirtualStatus.mnTextHeight    = 12;
    maVirtualStatus.mnTextWidth     = 0;
    maVirtualStatus.mfLineWidth     = 1.0;
    mbTextVertical                  = false;
    maLineColor                     = PrinterColor();
    maFillColor                     = PrinterColor();
    maTextColor                     = PrinterColor();
    mnDpi                           = 300;
    mnDepth                         = 24;
    mnPSLevel                       = 2;
    mbColor                         = true;
    mnTextAngle                     = 0_deg10;

    maClipRegion.clear();
    maGraphicsStack.clear();
    maGraphicsStack.emplace_back( );
}

/*
 * clip region handling
 */

void
PrinterGfx::ResetClipRegion()
{
    maClipRegion.clear();
    PSGRestore ();
    PSGSave (); // get "clean" clippath
}

void
PrinterGfx::BeginSetClipRegion()
{
    maClipRegion.clear();
}

void
PrinterGfx::UnionClipRegion (sal_Int32 nX,sal_Int32 nY,sal_Int32 nDX,sal_Int32 nDY)
{
    if( nDX && nDY )
        maClipRegion.emplace_back(Point(nX,nY ), Size(nDX,nDY));
}

bool
PrinterGfx::JoinVerticalClipRectangles( std::list< tools::Rectangle >::iterator& it,
                                        Point& rOldPoint, sal_Int32& rColumn )
{
    bool bSuccess = false;

    std::list< tools::Rectangle >::iterator tempit, nextit;
    nextit = it;
    ++nextit;
    std::list< Point > leftside, rightside;

    tools::Rectangle aLastRect( *it );
    leftside.emplace_back( it->Left(), it->Top() );
    rightside.emplace_back( it->Right()+1, it->Top() );
    while( nextit != maClipRegion.end() )
    {
        tempit = nextit;
        ++tempit;
        if( nextit->Top() == aLastRect.Bottom()+1 )
        {
            if(
               ( nextit->Left() >= aLastRect.Left() && nextit->Left() <= aLastRect.Right() ) // left endpoint touches last rectangle
               ||
               ( nextit->Right() >= aLastRect.Left() && nextit->Right() <= aLastRect.Right() ) // right endpoint touches last rectangle
               ||
               ( nextit->Left() <= aLastRect.Left() && nextit->Right() >= aLastRect.Right() ) // whole line touches last rectangle
               )
            {
                if( aLastRect.GetHeight() > 1                           ||
                    std::abs( aLastRect.Left() - nextit->Left() ) > 2        ||
                    std::abs( aLastRect.Right() - nextit->Right() ) > 2
                    )
                {
                    leftside.emplace_back( aLastRect.Left(), aLastRect.Bottom()+1 );
                    rightside.emplace_back( aLastRect.Right()+1, aLastRect.Bottom()+1 );
                }
                aLastRect = *nextit;
                leftside.push_back( aLastRect.TopLeft() );
                rightside.push_back( aLastRect.TopRight() );
                maClipRegion.erase( nextit );
            }
        }
        nextit = tempit;
    }
    if( leftside.size() > 1 )
    {
        // push the last coordinates
        leftside.emplace_back( aLastRect.Left(), aLastRect.Bottom()+1 );
        rightside.emplace_back( aLastRect.Right()+1, aLastRect.Bottom()+1 );

        // cool, we can concatenate rectangles
        const int nDX = -65536, nDY = 65536;
        int nNewDX = 0, nNewDY = 0;

        Point aLastPoint = leftside.front();
        PSBinMoveTo (aLastPoint, rOldPoint, rColumn);
        leftside.pop_front();
        while( !leftside.empty() )
        {
            Point aPoint (leftside.front());
            leftside.pop_front();
            // may have been the last one
            if( !leftside.empty() )
            {
                nNewDX = aPoint.X() - aLastPoint.X();
                nNewDY = aPoint.Y() - aLastPoint.Y();
                if( nNewDX != 0 &&
                    static_cast<double>(nNewDY)/static_cast<double>(nNewDX) == double(nDY)/double(nDX) )
                    continue;
            }
            PSBinLineTo (aPoint, rOldPoint, rColumn);
            aLastPoint = aPoint;
        }

        aLastPoint = rightside.back();
        PSBinLineTo (aLastPoint, rOldPoint, rColumn);
        rightside.pop_back();
        while( !rightside.empty() )
        {
            Point aPoint (rightside.back());
            rightside.pop_back();
            if( !rightside.empty() )
            {
                nNewDX = aPoint.X() - aLastPoint.X();
                nNewDY = aPoint.Y() - aLastPoint.Y();
                if( nNewDX != 0 &&
                    static_cast<double>(nNewDY)/static_cast<double>(nNewDX) == double(nDY)/double(nDX) )
                    continue;
            }
            PSBinLineTo (aPoint, rOldPoint, rColumn);
        }

        tempit = it;
        ++tempit;
        maClipRegion.erase( it );
        it = tempit;
        bSuccess = true;
    }
    return bSuccess;
}

void
PrinterGfx::EndSetClipRegion()
{
    PSGRestore ();
    PSGSave (); // get "clean" clippath

    PSBinStartPath ();
    Point aOldPoint (0, 0);
    sal_Int32 nColumn = 0;

    std::list< tools::Rectangle >::iterator it = maClipRegion.begin();
    while( it != maClipRegion.end() )
    {
        // try to concatenate adjacent rectangles
        // first try in y direction, then in x direction
        if( ! JoinVerticalClipRectangles( it, aOldPoint, nColumn ) )
        {
            // failed, so it is a single rectangle
            PSBinMoveTo (Point( it->Left()-1, it->Top()-1),      aOldPoint, nColumn );
            PSBinLineTo (Point( it->Left()-1, it->Bottom()+1 ),  aOldPoint, nColumn );
            PSBinLineTo (Point( it->Right()+1, it->Bottom()+1 ), aOldPoint, nColumn );
            PSBinLineTo (Point( it->Right()+1, it->Top()-1 ),    aOldPoint, nColumn );
            ++it;
        }
    }

    PSBinEndPath ();

    WritePS (mpPageBody, "closepath clip newpath\n");
    maClipRegion.clear();
}

/*
 * draw graphic primitives
 */

void
PrinterGfx::DrawRect (const tools::Rectangle& rRectangle )
{
    OStringBuffer pRect;

    psp::getValueOf (rRectangle.Left(),      pRect);
    psp::appendStr (" ",                     pRect);
    psp::getValueOf (rRectangle.Top(),       pRect);
    psp::appendStr (" ",                     pRect);
    psp::getValueOf (rRectangle.GetWidth(),  pRect);
    psp::appendStr (" ",                     pRect);
    psp::getValueOf (rRectangle.GetHeight(), pRect);
    psp::appendStr (" ",                     pRect);
    auto const rect = pRect.makeStringAndClear();

    if( maFillColor.Is() )
    {
        PSSetColor (maFillColor);
        PSSetColor ();
        WritePS (mpPageBody, rect);
        WritePS (mpPageBody, "rectfill\n");
    }
    if( maLineColor.Is() )
    {
        PSSetColor (maLineColor);
        PSSetColor ();
        PSSetLineWidth ();
        WritePS (mpPageBody, rect);
        WritePS (mpPageBody, "rectstroke\n");
    }
}

void
PrinterGfx::DrawLine (const Point& rFrom, const Point& rTo)
{
    if( maLineColor.Is() )
    {
        PSSetColor (maLineColor);
        PSSetColor ();
        PSSetLineWidth ();

        PSMoveTo (rFrom);
        PSLineTo (rTo);
        WritePS (mpPageBody, "stroke\n" );
    }
}

void
PrinterGfx::DrawPixel (const Point& rPoint, const PrinterColor& rPixelColor)
{
    if( rPixelColor.Is() )
    {
        PSSetColor (rPixelColor);
        PSSetColor ();

        PSMoveTo (rPoint);
        PSLineTo (Point (rPoint.X ()+1, rPoint.Y ()));
        PSLineTo (Point (rPoint.X ()+1, rPoint.Y ()+1));
        PSLineTo (Point (rPoint.X (), rPoint.Y ()+1));
        WritePS (mpPageBody, "fill\n" );
    }
}

void
PrinterGfx::DrawPolyLine (sal_uInt32 nPoints, const Point* pPath)
{
    if( maLineColor.Is() && nPoints && pPath )
    {
        PSSetColor (maLineColor);
        PSSetColor ();
        PSSetLineWidth ();

        PSBinCurrentPath (nPoints, pPath);

        WritePS (mpPageBody, "stroke\n" );
    }
}

void
PrinterGfx::DrawPolygon (sal_uInt32 nPoints, const Point* pPath)
{
    // premature end of operation
    if (nPoints <= 0 || (pPath == nullptr) || !(maFillColor.Is() || maLineColor.Is()))
        return;

    // setup closed path
    Point aPoint( 0, 0 );
    sal_Int32 nColumn( 0 );

    PSBinStartPath();
    PSBinMoveTo( pPath[0], aPoint, nColumn );
    for( unsigned int n = 1; n < nPoints; n++ )
        PSBinLineTo( pPath[n], aPoint, nColumn );
    if( pPath[0] != pPath[nPoints-1] )
        PSBinLineTo( pPath[0], aPoint, nColumn );
    PSBinEndPath();

    // fill the polygon first, then draw the border, note that fill and
    // stroke reset the currentpath

    // if fill and stroke, save the current path
    if( maFillColor.Is() && maLineColor.Is())
        PSGSave();

    if (maFillColor.Is ())
    {
        PSSetColor (maFillColor);
        PSSetColor ();
        WritePS (mpPageBody, "eofill\n");
    }

    // restore the current path
    if( maFillColor.Is() && maLineColor.Is())
        PSGRestore();

    if (maLineColor.Is ())
    {
        PSSetColor (maLineColor);
        PSSetColor ();
        PSSetLineWidth ();
        WritePS (mpPageBody, "stroke\n");
    }
}

void
PrinterGfx::DrawPolyPolygon (sal_uInt32 nPoly, const sal_uInt32* pSizes, const Point** pPaths )
{
    // sanity check
    if ( !nPoly || !pPaths || !(maFillColor.Is() || maLineColor.Is()))
        return;

    // setup closed path
    for( unsigned int i = 0; i < nPoly; i++ )
    {
        Point aPoint( 0, 0 );
        sal_Int32 nColumn( 0 );

        PSBinStartPath();
        PSBinMoveTo( pPaths[i][0], aPoint, nColumn );
        for( unsigned int n = 1; n < pSizes[i]; n++ )
            PSBinLineTo( pPaths[i][n], aPoint, nColumn );
        if( pPaths[i][0] != pPaths[i][pSizes[i]-1] )
                PSBinLineTo( pPaths[i][0], aPoint, nColumn );
        PSBinEndPath();
    }

    // if eofill and stroke, save the current path
    if( maFillColor.Is() && maLineColor.Is())
        PSGSave();

    // first draw area
    if( maFillColor.Is() )
    {
        PSSetColor (maFillColor);
        PSSetColor ();
        WritePS (mpPageBody, "eofill\n");
    }

    // restore the current path
    if( maFillColor.Is() && maLineColor.Is())
        PSGRestore();

    // now draw outlines
    if( maLineColor.Is() )
    {
        PSSetColor (maLineColor);
        PSSetColor ();
        PSSetLineWidth ();
        WritePS (mpPageBody, "stroke\n");
    }
}

/*
 * Bezier Polygon Drawing methods.
 */

void
PrinterGfx::DrawPolyLineBezier (sal_uInt32 nPoints, const Point* pPath, const PolyFlags* pFlgAry)
{
    const sal_uInt32 nBezString= 1024;
    char pString[nBezString];

    if ( nPoints <= 1 || !maLineColor.Is() || !pPath )
        return;

    PSSetColor (maLineColor);
    PSSetColor ();
    PSSetLineWidth ();

    snprintf(pString, nBezString, "%" SAL_PRIdINT64 " %" SAL_PRIdINT64 " moveto\n", sal_Int64(pPath[0].X()), sal_Int64(pPath[0].Y()));
    WritePS(mpPageBody, pString);

    // Handle the drawing of mixed lines mixed with curves
    // - a normal point followed by a normal point is a line
    // - a normal point followed by 2 control points and a normal point is a curve
    for (unsigned int i=1; i<nPoints;)
    {
        if (pFlgAry[i] != PolyFlags::Control) //If the next point is a PolyFlags::Normal, we're drawing a line
        {
            snprintf(pString, nBezString, "%" SAL_PRIdINT64 " %" SAL_PRIdINT64 " lineto\n", sal_Int64(pPath[i].X()), sal_Int64(pPath[i].Y()));
            i++;
        }
        else //Otherwise we're drawing a spline
        {
            if (i+2 >= nPoints)
                return; //Error: wrong sequence of control/normal points somehow
            if ((pFlgAry[i] == PolyFlags::Control) && (pFlgAry[i+1] == PolyFlags::Control) &&
                (pFlgAry[i+2] != PolyFlags::Control))
            {
                snprintf(pString, nBezString, "%" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " curveto\n",
                         sal_Int64(pPath[i].X()), sal_Int64(pPath[i].Y()),
                         sal_Int64(pPath[i+1].X()), sal_Int64(pPath[i+1].Y()),
                         sal_Int64(pPath[i+2].X()), sal_Int64(pPath[i+2].Y()));
            }
            else
            {
                OSL_FAIL( "PrinterGfx::DrawPolyLineBezier: Strange output" );
            }
            i+=3;
        }
        WritePS(mpPageBody, pString);
    }

    // now draw outlines
    WritePS (mpPageBody, "stroke\n");
}

void
PrinterGfx::DrawPolygonBezier (sal_uInt32 nPoints, const Point* pPath, const PolyFlags* pFlgAry)
{
    const sal_uInt32 nBezString = 1024;
    char pString[nBezString];
    // premature end of operation
    if (nPoints <= 0 || (pPath == nullptr) || !(maFillColor.Is() || maLineColor.Is()))
        return;

    snprintf(pString, nBezString, "%" SAL_PRIdINT64 " %" SAL_PRIdINT64 " moveto\n", sal_Int64(pPath[0].X()), sal_Int64(pPath[0].Y()));
    WritePS(mpPageBody, pString); //Move to the starting point for the PolyPolygon
    for (unsigned int i=1; i < nPoints;)
    {
        if (pFlgAry[i] != PolyFlags::Control)
        {
            snprintf(pString, nBezString, "%" SAL_PRIdINT64 " %" SAL_PRIdINT64 " lineto\n",
                sal_Int64(pPath[i].X()), sal_Int64(pPath[i].Y()));
            WritePS(mpPageBody, pString);
            i++;
        }
        else
        {
            if (i+2 >= nPoints)
                return; //Error: wrong sequence of control/normal points somehow
            if ((pFlgAry[i] == PolyFlags::Control) && (pFlgAry[i+1] == PolyFlags::Control) &&
                    (pFlgAry[i+2] != PolyFlags::Control))
            {
                snprintf(pString, nBezString, "%" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " curveto\n",
                        sal_Int64(pPath[i].X()), sal_Int64(pPath[i].Y()),
                        sal_Int64(pPath[i+1].X()), sal_Int64(pPath[i+1].Y()),
                        sal_Int64(pPath[i+2].X()), sal_Int64(pPath[i+2].Y()));
                WritePS(mpPageBody, pString);
            }
            else
            {
                OSL_FAIL( "PrinterGfx::DrawPolygonBezier: Strange output" );
            }
            i+=3;
        }
    }

    // if fill and stroke, save the current path
    if( maFillColor.Is() && maLineColor.Is())
        PSGSave();

    if (maFillColor.Is ())
    {
        PSSetColor (maFillColor);
        PSSetColor ();
        WritePS (mpPageBody, "eofill\n");
    }

    // restore the current path
    if( maFillColor.Is() && maLineColor.Is())
        PSGRestore();
}

void
PrinterGfx::DrawPolyPolygonBezier (sal_uInt32 nPoly, const sal_uInt32 * pPoints, const Point* const * pPtAry, const PolyFlags* const* pFlgAry)
{
    const sal_uInt32 nBezString = 1024;
    char pString[nBezString];
    if ( !nPoly || !pPtAry || !pPoints || !(maFillColor.Is() || maLineColor.Is()))
        return;

    for (unsigned int i=0; i<nPoly;i++)
    {
        sal_uInt32 nPoints = pPoints[i];
        // sanity check
        if( nPoints == 0 || pPtAry[i] == nullptr )
            continue;

        snprintf(pString, nBezString, "%" SAL_PRIdINT64 " %" SAL_PRIdINT64 " moveto\n",
            sal_Int64(pPtAry[i][0].X()), sal_Int64(pPtAry[i][0].Y())); //Move to the starting point
        WritePS(mpPageBody, pString);
        for (unsigned int j=1; j < nPoints;)
        {
            // if no flag array exists for this polygon, then it must be a regular
            // polygon without beziers
            if ( ! pFlgAry[i] || pFlgAry[i][j] != PolyFlags::Control)
            {
                snprintf(pString, nBezString, "%" SAL_PRIdINT64 " %" SAL_PRIdINT64 " lineto\n",
                    sal_Int64(pPtAry[i][j].X()), sal_Int64(pPtAry[i][j].Y()));
                WritePS(mpPageBody, pString);
                j++;
            }
            else
            {
                if (j+2 >= nPoints)
                    break; //Error: wrong sequence of control/normal points somehow
                if ((pFlgAry[i][j] == PolyFlags::Control) && (pFlgAry[i][j+1] == PolyFlags::Control) && (pFlgAry[i][j+2] != PolyFlags::Control))
                {
                    snprintf(pString, nBezString, "%" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " %" SAL_PRIdINT64 " curveto\n",
                            sal_Int64(pPtAry[i][j].X()), sal_Int64(pPtAry[i][j].Y()),
                            sal_Int64(pPtAry[i][j+1].X()), sal_Int64(pPtAry[i][j+1].Y()),
                            sal_Int64(pPtAry[i][j+2].X()), sal_Int64(pPtAry[i][j+2].Y()));
                    WritePS(mpPageBody, pString);
                }
                else
                {
                    OSL_FAIL( "PrinterGfx::DrawPolyPolygonBezier: Strange output" );
                }
                j+=3;
            }
        }
    }

    // if fill and stroke, save the current path
    if( maFillColor.Is() && maLineColor.Is())
        PSGSave();

    if (maFillColor.Is ())
    {
        PSSetColor (maFillColor);
        PSSetColor ();
        WritePS (mpPageBody, "eofill\n");
    }

    // restore the current path
    if( maFillColor.Is() && maLineColor.Is())
        PSGRestore();
}

/*
 * postscript generating routines
 */
void
PrinterGfx::PSGSave ()
{
    WritePS (mpPageBody, "gsave\n" );
    GraphicsStatus aNewState;
    if( !maGraphicsStack.empty() )
        aNewState = maGraphicsStack.front();
    maGraphicsStack.push_front( aNewState );
}

void
PrinterGfx::PSGRestore ()
{
    WritePS (mpPageBody, "grestore\n" );
    if( maGraphicsStack.empty() )
        WritePS (mpPageBody, "Error: too many grestores\n" );
    else
        maGraphicsStack.pop_front();
}

void
PrinterGfx::PSSetLineWidth ()
{
    if( currentState().mfLineWidth != maVirtualStatus.mfLineWidth )
    {
        OStringBuffer pBuffer;

        currentState().mfLineWidth = maVirtualStatus.mfLineWidth;
        psp::getValueOfDouble (pBuffer, maVirtualStatus.mfLineWidth, 5);
        psp::appendStr (" setlinewidth\n", pBuffer);
        WritePS (mpPageBody, pBuffer.makeStringAndClear());
    }
}

void
PrinterGfx::PSSetColor ()
{
    PrinterColor& rColor( maVirtualStatus.maColor );

    if( currentState().maColor == rColor )
        return;

    currentState().maColor = rColor;

    OStringBuffer pBuffer;

    if( mbColor )
    {
        psp::getValueOfDouble (pBuffer,
                                        static_cast<double>(rColor.GetRed()) / 255.0, 5);
        psp::appendStr (" ", pBuffer);
        psp::getValueOfDouble (pBuffer,
                                        static_cast<double>(rColor.GetGreen()) / 255.0, 5);
        psp::appendStr (" ", pBuffer);
        psp::getValueOfDouble (pBuffer,
                                        static_cast<double>(rColor.GetBlue()) / 255.0, 5);
        psp::appendStr (" setrgbcolor\n", pBuffer );
    }
    else
    {
        Color aColor( rColor.GetRed(), rColor.GetGreen(), rColor.GetBlue() );
        sal_uInt8 nCol = aColor.GetLuminance();
        psp::getValueOfDouble( pBuffer, static_cast<double>(nCol) / 255.0, 5 );
        psp::appendStr( " setgray\n", pBuffer );
    }

    WritePS (mpPageBody, pBuffer.makeStringAndClear());
}

void
PrinterGfx::PSSetFont ()
{
    GraphicsStatus& rCurrent( currentState() );
    if( !(maVirtualStatus.maFont          != rCurrent.maFont          ||
          maVirtualStatus.mnTextHeight    != rCurrent.mnTextHeight    ||
          maVirtualStatus.maEncoding      != rCurrent.maEncoding      ||
          maVirtualStatus.mnTextWidth     != rCurrent.mnTextWidth     ||
          maVirtualStatus.mbArtBold       != rCurrent.mbArtBold       ||
          maVirtualStatus.mbArtItalic     != rCurrent.mbArtItalic)
        )
        return;

    rCurrent.maFont              = maVirtualStatus.maFont;
    rCurrent.maEncoding          = maVirtualStatus.maEncoding;
    rCurrent.mnTextWidth         = maVirtualStatus.mnTextWidth;
    rCurrent.mnTextHeight        = maVirtualStatus.mnTextHeight;
    rCurrent.mbArtItalic         = maVirtualStatus.mbArtItalic;
    rCurrent.mbArtBold           = maVirtualStatus.mbArtBold;

    sal_Int32 nTextHeight = rCurrent.mnTextHeight;
    sal_Int32 nTextWidth  = rCurrent.mnTextWidth ? rCurrent.mnTextWidth
                                                 : rCurrent.mnTextHeight;

    OStringBuffer pSetFont;

    // postscript based fonts need reencoding
    if (   (   rCurrent.maEncoding == RTL_TEXTENCODING_MS_1252)
        || (   rCurrent.maEncoding == RTL_TEXTENCODING_ISO_8859_1)
        || (   rCurrent.maEncoding >= RTL_TEXTENCODING_USER_START
            && rCurrent.maEncoding <= RTL_TEXTENCODING_USER_END)
       )
    {
        OString aReencodedFont =
                    psp::GlyphSet::GetReencodedFontName (rCurrent.maEncoding,
                                                            rCurrent.maFont);

        psp::appendStr  ("(",          pSetFont);
        psp::appendStr  (aReencodedFont.getStr(),
                                                pSetFont);
        psp::appendStr  (") cvn findfont ",
                                                pSetFont);
    }
    else
    // tt based fonts mustn't reencode, the encoding is implied by the fontname
    // same for symbol type1 fonts, don't try to touch them
    {
        psp::appendStr  ("(",          pSetFont);
        psp::appendStr  (rCurrent.maFont.getStr(),
                                                pSetFont);
        psp::appendStr  (") cvn findfont ",
                                                pSetFont);
    }

    if( ! rCurrent.mbArtItalic )
    {
        psp::getValueOf (nTextWidth,   pSetFont);
        psp::appendStr  (" ",          pSetFont);
        psp::getValueOf (-nTextHeight, pSetFont);
        psp::appendStr  (" matrix scale makefont setfont\n", pSetFont);
    }
    else // skew 15 degrees to right
    {
        psp::appendStr  ( " [",        pSetFont);
        psp::getValueOf (nTextWidth,   pSetFont);
        psp::appendStr  (" 0 ",        pSetFont);
        psp::getValueOfDouble (pSetFont, 0.27*static_cast<double>(nTextWidth), 3 );
        psp::appendStr  ( " ",         pSetFont);
        psp::getValueOf (-nTextHeight, pSetFont);

        psp::appendStr  (" 0 0] makefont setfont\n", pSetFont);
    }

    WritePS (mpPageBody, pSetFont.makeStringAndClear());

}

void
PrinterGfx::PSRotate (Degree10 nAngle)
{
    sal_Int32 nPostScriptAngle = -nAngle.get();
    while( nPostScriptAngle < 0 )
        nPostScriptAngle += 3600;

    if (nPostScriptAngle == 0)
        return;

    sal_Int32 nFullAngle  = nPostScriptAngle / 10;
    sal_Int32 nTenthAngle = nPostScriptAngle % 10;

    OStringBuffer pRotate;

    psp::getValueOf (nFullAngle,  pRotate);
    psp::appendStr (".",          pRotate);
    psp::getValueOf (nTenthAngle, pRotate);
    psp::appendStr (" rotate\n",  pRotate);

    WritePS (mpPageBody, pRotate.makeStringAndClear());
}

void
PrinterGfx::PSPointOp (const Point& rPoint, const char* pOperator)
{
    OStringBuffer pPSCommand;

    psp::getValueOf (rPoint.X(), pPSCommand);
    psp::appendStr  (" ",        pPSCommand);
    psp::getValueOf (rPoint.Y(), pPSCommand);
    psp::appendStr  (" ",        pPSCommand);
    psp::appendStr  (pOperator,  pPSCommand);
    psp::appendStr  ("\n",       pPSCommand);

    WritePS (mpPageBody, pPSCommand.makeStringAndClear());
}

void
PrinterGfx::PSTranslate (const Point& rPoint)
{
    PSPointOp (rPoint, "translate");
}

void
PrinterGfx::PSMoveTo (const Point& rPoint)
{
    PSPointOp (rPoint, "moveto");
}

void
PrinterGfx::PSLineTo (const Point& rPoint)
{
    PSPointOp (rPoint, "lineto");
}

/* get a compressed representation of the path information */

#define DEBUG_BINPATH 0

void
PrinterGfx::PSBinLineTo (const Point& rCurrent, Point& rOld, sal_Int32& nColumn)
{
#if (DEBUG_BINPATH == 1)
    PSLineTo (rCurrent);
#else
    PSBinPath (rCurrent, rOld, lineto, nColumn);
#endif
}

void
PrinterGfx::PSBinMoveTo (const Point& rCurrent, Point& rOld, sal_Int32& nColumn)
{
#if (DEBUG_BINPATH == 1)
    PSMoveTo (rCurrent);
#else
    PSBinPath (rCurrent, rOld, moveto, nColumn);
#endif
}

void
PrinterGfx::PSBinStartPath ()
{
#if (DEBUG_BINPATH == 1)
    WritePS (mpPageBody, "% PSBinStartPath\n");
#else
    WritePS (mpPageBody, "readpath\n" );
#endif
}

void
PrinterGfx::PSBinEndPath ()
{
#if (DEBUG_BINPATH == 1)
    WritePS (mpPageBody, "% PSBinEndPath\n");
#else
    WritePS (mpPageBody, "~\n");
#endif
}

void
PrinterGfx::PSBinCurrentPath (sal_uInt32 nPoints, const Point* pPath)
{
    // create the path
    Point     aPoint (0, 0);
    sal_Int32 nColumn = 0;

    PSBinStartPath ();
    PSBinMoveTo (*pPath, aPoint, nColumn);
    for (unsigned int i = 1; i < nPoints; i++)
        PSBinLineTo (pPath[i], aPoint, nColumn);
    PSBinEndPath ();
}

void
PrinterGfx::PSBinPath (const Point& rCurrent, Point& rOld,
                       pspath_t eType, sal_Int32& nColumn)
{
    OStringBuffer pPath;
    sal_Int32 nChar;

    // create the hex representation of the dx and dy path shift, store the field
    // width as it is needed for the building the command
    sal_Int32 nXPrec = getAlignedHexValueOf (rCurrent.X() - rOld.X(), pPath);
    sal_Int32 nYPrec = getAlignedHexValueOf (rCurrent.Y() - rOld.Y(), pPath);

    // build the command, it is a char with bit representation 000cxxyy
    // c represents the char, xx and yy repr. the field width of the dx and dy shift,
    // dx and dy represent the number of bytes to read after the opcode
    char cCmd = (eType == lineto ? char(0x00) : char(0x10));
    switch (nYPrec)
    {
        case 2: break;
        case 4: cCmd |= 0x01;   break;
        case 6: cCmd |= 0x02;   break;
        case 8: cCmd |= 0x03;   break;
        default:    OSL_FAIL("invalid x precision in binary path");
    }
    switch (nXPrec)
    {
        case 2: break;
        case 4: cCmd |= 0x04;   break;
        case 6: cCmd |= 0x08;   break;
        case 8: cCmd |= 0x0c;   break;
        default:    OSL_FAIL("invalid y precision in binary path");
    }
    cCmd += 'A';
    pPath.insert(0, cCmd);
    auto const path = pPath.makeStringAndClear();

    // write the command to file,
    // line breaking at column nMaxTextColumn (80)
    nChar = 1 + nXPrec + nYPrec;
    if ((nColumn + nChar) > nMaxTextColumn)
    {
        sal_Int32 nSegment = nMaxTextColumn - nColumn;

        WritePS (mpPageBody, path.copy(0, nSegment));
        WritePS (mpPageBody, "\n", 1);
        WritePS (mpPageBody, path.copy(nSegment));

        nColumn  = nChar - nSegment;
    }
    else
    {
        WritePS (mpPageBody, path);

        nColumn += nChar;
    }

    rOld = rCurrent;
}

void
PrinterGfx::PSScale (double fScaleX, double fScaleY)
{
    OStringBuffer pScale;

    psp::getValueOfDouble (pScale, fScaleX, 5);
    psp::appendStr        (" ", pScale);
    psp::getValueOfDouble (pScale, fScaleY, 5);
    psp::appendStr        (" scale\n", pScale);

    WritePS (mpPageBody, pScale.makeStringAndClear());
}

/* psshowtext helper routines: draw an hex string for show/xshow */
void
PrinterGfx::PSHexString (const unsigned char* pString, sal_Int16 nLen)
{
    OStringBuffer pHexString;
    sal_Int32 nChar = psp::appendStr ("<", pHexString);
    for (int i = 0; i < nLen; i++)
    {
        if (nChar >= (nMaxTextColumn - 1))
        {
            psp::appendStr ("\n", pHexString);
            WritePS (mpPageBody, pHexString.makeStringAndClear());
            nChar = 0;
        }
        nChar += psp::getHexValueOf (static_cast<sal_Int32>(pString[i]), pHexString);
    }

    psp::appendStr (">\n", pHexString);
    WritePS (mpPageBody, pHexString.makeStringAndClear());
}

void
PrinterGfx::PSShowGlyph (const unsigned char nGlyphId)
{
    PSSetColor (maTextColor);
    PSSetColor ();
    PSSetFont  ();
    // rotate the user coordinate system
    if (mnTextAngle)
    {
        PSGSave ();
        PSRotate (mnTextAngle);
    }

    char pBuffer[256];
    if( maVirtualStatus.mbArtBold )
    {
        sal_Int32 nLW = maVirtualStatus.mnTextWidth;
        if( nLW == 0 )
            nLW = maVirtualStatus.mnTextHeight;
        else
            nLW = std::min(nLW, maVirtualStatus.mnTextHeight);
        psp::getValueOfDouble( pBuffer, static_cast<double>(nLW) / 30.0 );
    }

    // dispatch to the drawing method
    PSHexString (&nGlyphId, 1);

    if( maVirtualStatus.mbArtBold )
    {
        WritePS( mpPageBody, pBuffer );
        WritePS( mpPageBody, " bshow\n" );
    }
    else
        WritePS (mpPageBody, "show\n");

    // restore the user coordinate system
    if (mnTextAngle)
        PSGRestore ();
}

bool
PrinterGfx::DrawEPS( const tools::Rectangle& rBoundingBox, void* pPtr, sal_uInt32 nSize )
{
    if( nSize == 0 )
        return true;
    if( ! mpPageBody )
        return false;

    bool bSuccess = false;

    // first search the BoundingBox of the EPS data
    SvMemoryStream aStream( pPtr, nSize, StreamMode::READ );
    aStream.Seek( STREAM_SEEK_TO_BEGIN );
    OString aLine;

    OString aDocTitle;
    double fLeft = 0, fRight = 0, fTop = 0, fBottom = 0;
    bool bEndComments = false;
    while( ! aStream.eof()
           && ( ( fLeft == 0 && fRight == 0 && fTop == 0 && fBottom == 0 ) ||
                ( aDocTitle.isEmpty() && !bEndComments ) )
           )
    {
        aStream.ReadLine( aLine );
        if( aLine.getLength() > 1 && aLine[0] == '%' )
        {
            char cChar = aLine[1];
            if( cChar == '%' )
            {
                if( aLine.matchIgnoreAsciiCase( "%%BoundingBox:" ) )
                {
                    aLine = WhitespaceToSpace( o3tl::getToken(aLine, 1, ':') );
                    if( !aLine.isEmpty() && aLine.indexOf( "atend" ) == -1 )
                    {
                        fLeft   = StringToDouble( GetCommandLineToken( 0, aLine ) );
                        fBottom = StringToDouble( GetCommandLineToken( 1, aLine ) );
                        fRight  = StringToDouble( GetCommandLineToken( 2, aLine ) );
                        fTop    = StringToDouble( GetCommandLineToken( 3, aLine ) );
                    }
                }
                else if( aLine.matchIgnoreAsciiCase( "%%Title:" ) )
                    aDocTitle = WhitespaceToSpace( aLine.subView( 8 ) );
                else if( aLine.matchIgnoreAsciiCase( "%%EndComments" ) )
                    bEndComments = true;
            }
            else if( cChar == ' ' || cChar == '\t' || cChar == '\r' || cChar == '\n' )
                bEndComments = true;
        }
        else
            bEndComments = true;
    }

    static sal_uInt16 nEps = 0;
    if( aDocTitle.isEmpty() )
        aDocTitle = OString::number(nEps++);

    if( fLeft != fRight && fTop != fBottom )
    {
        double fScaleX = static_cast<double>(rBoundingBox.GetWidth())/(fRight-fLeft);
        double fScaleY = -static_cast<double>(rBoundingBox.GetHeight())/(fTop-fBottom);
        Point aTranslatePoint( static_cast<int>(rBoundingBox.Left()-fLeft*fScaleX),
                               static_cast<int>(rBoundingBox.Bottom()+1-fBottom*fScaleY) );
        // prepare EPS
        WritePS( mpPageBody,
                 "/b4_Inc_state save def\n"
                 "/dict_count countdictstack def\n"
                 "/op_count count 1 sub def\n"
                 "userdict begin\n"
                 "/showpage {} def\n"
                 "0 setgray 0 setlinecap 1 setlinewidth 0 setlinejoin\n"
                 "10 setmiterlimit [] 0 setdash newpath\n"
                 "/languagelevel where\n"
                 "{pop languagelevel\n"
                 "1 ne\n"
                 "  {false setstrokeadjust false setoverprint\n"
                 "  } if\n"
                 "}if\n" );
        // set up clip path and scale
        BeginSetClipRegion();
        UnionClipRegion( rBoundingBox.Left(), rBoundingBox.Top(), rBoundingBox.GetWidth(), rBoundingBox.GetHeight() );
        EndSetClipRegion();
        PSTranslate( aTranslatePoint );
        PSScale( fScaleX, fScaleY );

        // DSC requires BeginDocument
        WritePS( mpPageBody, "%%BeginDocument: " );
        WritePS( mpPageBody, aDocTitle );
        WritePS( mpPageBody, "\n" );

        // write the EPS data
        sal_uInt64 nOutLength;
        mpPageBody->write( pPtr, nSize, nOutLength );
        bSuccess = nOutLength == nSize;

        // corresponding EndDocument
        if( static_cast<char*>(pPtr)[ nSize-1 ] != '\n' )
            WritePS( mpPageBody, "\n" );
        WritePS( mpPageBody, "%%EndDocument\n" );

        // clean up EPS
        WritePS( mpPageBody,
                 "count op_count sub {pop} repeat\n"
                 "countdictstack dict_count sub {end} repeat\n"
                 "b4_Inc_state restore\n" );
    }
    return bSuccess;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */