/* -*- 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 <filter/PictReader.hxx>
#include <string.h>
#include <osl/thread.h>
#include <sal/log.hxx>
#include <vcl/BitmapTools.hxx>
#include <vcl/graph.hxx>
#include <vcl/gdimtf.hxx>
#include <tools/poly.hxx>
#include <tools/fract.hxx>
#include <tools/stream.hxx>
#include <vcl/virdev.hxx>
#include <math.h>
#include "shape.hxx"
#include <memory>

#include <vcl/FilterConfigItem.hxx>
    // complete FilterConfigItem for GraphicImport under -fsanitize=function

namespace PictReaderInternal {
  namespace {

  //! utilitary class to store a pattern, ...
  class Pattern {
  public:
    //! constructor
    Pattern() : penStyle(PEN_SOLID),
                brushStyle(BRUSH_SOLID),
                nBitCount(64),
                isColor(false),
                isRead(false)
    {}

    //! reads black/white pattern from SvStream
    sal_uInt8 read(SvStream &stream);
    //! sets the color
    void setColor(Color col) { isColor = true; color = col; }
    /** returns a color which can be "used" to replace the pattern,
     *     created from ForeColor and BackColor, ...
     *
     * note: maybe, we must also use some mode PatCopy, ... to define the color
     */
    Color getColor(Color bkColor, Color fgColor) const {
      if (isColor) return color;
      // we create a gray pattern from nBitCount
      double alpha = nBitCount / 64.0;
      return Color(sal_uInt8(alpha*fgColor.GetRed()+(1.0-alpha)*bkColor.GetRed()),
           sal_uInt8(alpha*fgColor.GetGreen()+(1.0-alpha)*bkColor.GetGreen()),
           sal_uInt8(alpha*fgColor.GetBlue()+(1.0-alpha)*bkColor.GetBlue()));
    }

    //! returns true if this is the default pattern
    bool isDefault() const { return !isRead; }

    enum PenStyle { PEN_NULL, PEN_SOLID, PEN_DOT, PEN_DASH, PEN_DASHDOT };
    enum BrushStyle { BRUSH_SOLID, BRUSH_HORZ, BRUSH_VERT,
              BRUSH_CROSS, BRUSH_DIAGCROSS, BRUSH_UPDIAG, BRUSH_DOWNDIAG,
              BRUSH_25, BRUSH_50, BRUSH_75 };
    // Data
    enum PenStyle penStyle;
    enum BrushStyle brushStyle;
    short nBitCount;

    bool isColor; // true if it is a color pattern
    Color color;

  protected:
    // flag to know if the pattern came from reading the picture, or if it is the default pattern
    bool isRead;
  };

  }

  sal_uInt8 Pattern::read(SvStream &stream) {
    unsigned char nbyte[8] = {0};
    isColor = false;

    // count the no of bits in pattern which are set to 1:
    nBitCount=0;
    for (unsigned char & ny : nbyte) {
      stream.ReadChar( reinterpret_cast<char&>(ny) );
      for (short nx=0; nx<8; nx++) {
        if ( (ny & (1<<nx)) != 0 ) nBitCount++;
      }
    }

    // store pattern in 2 long words:
    sal_uInt32 nHiBytes = (((((static_cast<sal_uInt32>(nbyte[0])<<8)|
         static_cast<sal_uInt32>(nbyte[1]))<<8)|
           static_cast<sal_uInt32>(nbyte[2]))<<8)|
      static_cast<sal_uInt32>(nbyte[3]);
    sal_uInt32 nLoBytes = (((((static_cast<sal_uInt32>(nbyte[4])<<8)|
         static_cast<sal_uInt32>(nbyte[5]))<<8)|
           static_cast<sal_uInt32>(nbyte[6]))<<8)|
      static_cast<sal_uInt32>(nbyte[7]);

    // create a PenStyle:
    if      (nBitCount<=0)  penStyle=PEN_NULL;
    else if (nBitCount<=16) penStyle=PEN_DOT;
    else if (nBitCount<=32) penStyle=PEN_DASHDOT;
    else if (nBitCount<=48) penStyle=PEN_DASH;
    else                    penStyle=PEN_SOLID;

    // create a BrushStyle:
    if      (nHiBytes==0xffffffff && nLoBytes==0xffffffff) brushStyle=BRUSH_SOLID;
    else if (nHiBytes==0xff000000 && nLoBytes==0x00000000) brushStyle=BRUSH_HORZ;
    else if (nHiBytes==0x80808080 && nLoBytes==0x80808080) brushStyle=BRUSH_VERT;
    else if (nHiBytes==0xff808080 && nLoBytes==0x80808080) brushStyle=BRUSH_CROSS;
    else if (nHiBytes==0x01824428 && nLoBytes==0x10284482) brushStyle=BRUSH_DIAGCROSS;
    else if (nHiBytes==0x80402010 && nLoBytes==0x08040201) brushStyle=BRUSH_UPDIAG;
    else if (nHiBytes==0x01020408 && nLoBytes==0x10204080) brushStyle=BRUSH_DOWNDIAG;
    else if (nBitCount<=24) brushStyle=BRUSH_25;
    else if (nBitCount<=40) brushStyle=BRUSH_50;
    else if (nBitCount<=56) brushStyle=BRUSH_75;
    else                    brushStyle=BRUSH_SOLID;

    isRead = true;

    return 8;
  }
}

//============================ PictReader ==================================

namespace {

enum class PictDrawingMethod {
    FRAME, PAINT, ERASE, INVERT, FILL,
    TEXT, UNDEFINED
};

class PictReader {
  typedef class PictReaderInternal::Pattern Pattern;
private:

    SvStream    * pPict;             // The Pict file to read.
    VclPtr<VirtualDevice> pVirDev;   // Here the drawing method will be called.
                                     // A recording into the GDIMetaFile will take place.

    sal_uInt64    nOrigPos;          // Initial position in pPict.
    bool          IsVersion2;        // If it is a version 2 Pictfile.
    tools::Rectangle     aBoundingRect;     // Min/Max-Rectangle for the whole drawing.

    Point         aPenPosition;
    Point         aTextPosition;
    Color         aActForeColor;
    Color         aActBackColor;
    Pattern       eActPenPattern;
    Pattern       eActFillPattern;
    Pattern       eActBackPattern;
    Size          nActPenSize;
 // Note: Postscript mode is stored by setting eActRop to RasterOp::N1
    RasterOp      eActROP;
    PictDrawingMethod eActMethod;
    Size          aActOvalSize;
    vcl::Font     aActFont;

    Fraction        aHRes;
    Fraction        aVRes;

    Point ReadPoint();

    Point ReadDeltaH(Point aBase);
    Point ReadDeltaV(Point aBase);

    Point ReadUnsignedDeltaH(Point aBase);
    Point ReadUnsignedDeltaV(Point aBase);

    Size ReadSize();

    Color ReadColor();

    Color ReadRGBColor();

    void ReadRectangle(tools::Rectangle & rRect);

    sal_uInt64 ReadPolygon(tools::Polygon & rPoly);

    sal_uInt64 ReadPixPattern(Pattern &pattern);

    tools::Rectangle aLastRect;
    sal_uInt8 ReadAndDrawRect(PictDrawingMethod eMethod);
    sal_uInt8 ReadAndDrawSameRect(PictDrawingMethod eMethod);

    tools::Rectangle aLastRoundRect;
    sal_uInt8 ReadAndDrawRoundRect(PictDrawingMethod eMethod);
    sal_uInt8 ReadAndDrawSameRoundRect(PictDrawingMethod eMethod);

    tools::Rectangle aLastOval;
    sal_uInt8 ReadAndDrawOval(PictDrawingMethod eMethod);
    sal_uInt8 ReadAndDrawSameOval(PictDrawingMethod eMethod);

    tools::Polygon aLastPolygon;
    sal_uInt64 ReadAndDrawPolygon(PictDrawingMethod eMethod);
    sal_uInt8 ReadAndDrawSamePolygon(PictDrawingMethod eMethod);

    tools::Rectangle aLastArcRect;
    sal_uInt8 ReadAndDrawArc(PictDrawingMethod eMethod);
    sal_uInt8 ReadAndDrawSameArc(PictDrawingMethod eMethod);

    sal_uInt64 ReadAndDrawRgn(PictDrawingMethod eMethod);
    sal_uInt8 ReadAndDrawSameRgn(PictDrawingMethod eMethod);

    // returns true if there's no need to print the shape/text/frame
    bool IsInvisible( PictDrawingMethod eMethod ) const {
      if ( eActROP == RasterOp::N1 ) return true;
      if ( eMethod == PictDrawingMethod::FRAME && nActPenSize.IsEmpty() ) return true;
      return false;
    }

    void DrawingMethod(PictDrawingMethod eMethod);

    sal_uInt64 ReadAndDrawText();

    sal_uInt64 ReadPixMapEtc(Bitmap & rBitmap, bool bBaseAddr, bool bColorTable,
                        tools::Rectangle * pSrcRect, tools::Rectangle * pDestRect,
                        bool bMode, bool bMaskRgn);

    void ReadHeader();
        // Reads the header of the Pict file, set IsVersion and aBoundingRect

    sal_uInt64 ReadData(sal_uInt16 nOpcode);
        // Reads the date of anOopcode and executes the operation.
        // The number of data bytes belonging to the opcode will be returned
        // in any case.

    void SetLineColor( const Color& rColor );
    void SetFillColor( const Color& rColor );

    // OSNOLA: returns the text encoding which must be used for system id
    static rtl_TextEncoding GetTextEncoding (sal_uInt16 fId = 0xFFFF);

public:

    PictReader()
        : pPict(nullptr)
        , pVirDev(nullptr)
        , nOrigPos(0)
        , IsVersion2(false)
        , eActROP(RasterOp::OverPaint)
        , eActMethod(PictDrawingMethod::UNDEFINED)
    {
        aActFont.SetCharSet(GetTextEncoding());
    }

    void ReadPict( SvStream & rStreamPict, GDIMetaFile & rGDIMetaFile );
        // reads a pict file from the stream and fills the GDIMetaFile

};

}

static void SetByte(sal_uInt16& nx, sal_uInt16 ny, vcl::bitmap::RawBitmap& rBitmap, sal_uInt16 nPixelSize, sal_uInt8 nDat, sal_uInt16 nWidth, std::vector<Color> const & rvPalette)
{
    switch (nPixelSize)
    {
        case 1:
            rBitmap.SetPixel(ny, nx++, rvPalette[(nDat >> 7) & 1]);
            if ( nx == nWidth ) break;
            rBitmap.SetPixel(ny, nx++, rvPalette[(nDat >> 6) & 1]);
            if ( nx == nWidth ) break;
            rBitmap.SetPixel(ny, nx++, rvPalette[(nDat >> 5) & 1]);
            if ( nx == nWidth ) break;
            rBitmap.SetPixel(ny, nx++, rvPalette[(nDat >> 4) & 1]);
            if ( nx == nWidth ) break;
            rBitmap.SetPixel(ny, nx++, rvPalette[(nDat >> 3) & 1]);
            if ( nx == nWidth ) break;
            rBitmap.SetPixel(ny, nx++, rvPalette[(nDat >> 2) & 1]);
            if ( nx == nWidth ) break;
            rBitmap.SetPixel(ny, nx++, rvPalette[(nDat >> 1) & 1]);
            if ( nx == nWidth ) break;
            rBitmap.SetPixel(ny, nx++, rvPalette[nDat & 1]);
            break;
        case 2:
            rBitmap.SetPixel(ny, nx++, rvPalette[nDat >> 6]);
            if ( nx == nWidth ) break;
            rBitmap.SetPixel(ny, nx++, rvPalette[(nDat>>4)&3]);
            if ( nx == nWidth ) break;
            rBitmap.SetPixel(ny, nx++, rvPalette[(nDat>>2)&3]);
            if ( nx == nWidth ) break;
            rBitmap.SetPixel(ny, nx++, rvPalette[nDat & 3]);
            break;
        case 4:
            rBitmap.SetPixel(ny, nx++, rvPalette[nDat >> 4]);
            if ( nx == nWidth ) break;
            rBitmap.SetPixel(ny, nx++, rvPalette[nDat & 0x0f]);
            break;
        case 8:
            rBitmap.SetPixel(ny, nx++, rvPalette[nDat]);
            break;
    }
}

//=================== methods of PictReader ==============================
rtl_TextEncoding PictReader::GetTextEncoding (sal_uInt16 fId) {
  static rtl_TextEncoding enc = []()
  {
    rtl_TextEncoding def = osl_getThreadTextEncoding();
    // we keep osl_getThreadTextEncoding only if it is a mac encoding
    switch(def) {
    case RTL_TEXTENCODING_APPLE_ROMAN:
    case RTL_TEXTENCODING_APPLE_ARABIC:
    case RTL_TEXTENCODING_APPLE_CENTEURO:
    case RTL_TEXTENCODING_APPLE_CROATIAN:
    case RTL_TEXTENCODING_APPLE_CYRILLIC:
    case RTL_TEXTENCODING_APPLE_DEVANAGARI:
    case RTL_TEXTENCODING_APPLE_FARSI:
    case RTL_TEXTENCODING_APPLE_GREEK:
    case RTL_TEXTENCODING_APPLE_GUJARATI:
    case RTL_TEXTENCODING_APPLE_GURMUKHI:
    case RTL_TEXTENCODING_APPLE_HEBREW:
    case RTL_TEXTENCODING_APPLE_ICELAND:
    case RTL_TEXTENCODING_APPLE_ROMANIAN:
    case RTL_TEXTENCODING_APPLE_THAI:
    case RTL_TEXTENCODING_APPLE_TURKISH:
    case RTL_TEXTENCODING_APPLE_UKRAINIAN:
    case RTL_TEXTENCODING_APPLE_CHINSIMP:
    case RTL_TEXTENCODING_APPLE_CHINTRAD:
    case RTL_TEXTENCODING_APPLE_JAPANESE:
    case RTL_TEXTENCODING_APPLE_KOREAN:
      return def; break;
    default:
        break;
    }
    return RTL_TEXTENCODING_APPLE_ROMAN;
  }();
  if (fId == 13) return RTL_TEXTENCODING_ADOBE_DINGBATS; // CHECKME
  if (fId == 23) return RTL_TEXTENCODING_ADOBE_SYMBOL;
  return enc;
}

void PictReader::SetLineColor( const Color& rColor )
{
    pVirDev->SetLineColor( rColor );
}

void PictReader::SetFillColor( const Color& rColor )
{
    pVirDev->SetFillColor( rColor );
}

Point PictReader::ReadPoint()
{
    short nx(0), ny(0);

    pPict->ReadInt16( ny ).ReadInt16( nx );

    Point aPoint(nx - aBoundingRect.Left(), ny - aBoundingRect.Top());

    SAL_INFO("filter.pict", "ReadPoint: " << aPoint);
    return aPoint;
}

Point PictReader::ReadDeltaH(Point aBase)
{
    signed char ndh(0);

    pPict->ReadChar( reinterpret_cast<char&>(ndh) );

    return Point( aBase.X() + static_cast<tools::Long>(ndh), aBase.Y() );
}

Point PictReader::ReadDeltaV(Point aBase)
{
    signed char ndv(0);

    pPict->ReadChar( reinterpret_cast<char&>(ndv) );

    return Point( aBase.X(), aBase.Y() + static_cast<tools::Long>(ndv) );
}

Point PictReader::ReadUnsignedDeltaH(Point aBase)
{
    sal_uInt8 ndh(0);

    pPict->ReadUChar( ndh );

    return Point( aBase.X() + static_cast<tools::Long>(ndh), aBase.Y() );
}

Point PictReader::ReadUnsignedDeltaV(Point aBase)
{
    sal_uInt8 ndv(0);

    pPict->ReadUChar( ndv );

    return Point( aBase.X(), aBase.Y() + static_cast<tools::Long>(ndv) );
}

Size PictReader::ReadSize()
{
    short nx(0), ny(0);

    pPict->ReadInt16( ny ).ReadInt16( nx );

    return Size(nx, ny);
}

Color PictReader::ReadColor()
{
    Color aCol;

    sal_uInt32 nCol(0);
    pPict->ReadUInt32( nCol );
    switch (nCol)
    {
        case  33: aCol=COL_BLACK;        break;
        case  30: aCol=COL_WHITE;        break;
        case 205: aCol=COL_LIGHTRED;     break;
        case 341: aCol=COL_LIGHTGREEN;   break;
        case 409: aCol=COL_LIGHTBLUE;    break;
        case 273: aCol=COL_LIGHTCYAN;    break;
        case 137: aCol=COL_LIGHTMAGENTA; break;
        case  69: aCol=COL_YELLOW;       break;
        default:  aCol=COL_LIGHTGRAY;
    }
    return aCol;
}

Color PictReader::ReadRGBColor()
{
    sal_uInt16 nR(0), nG(0), nB(0);

    pPict->ReadUInt16( nR ).ReadUInt16( nG ).ReadUInt16( nB );
    return Color( static_cast<sal_uInt8>( nR >> 8 ), static_cast<sal_uInt8>( nG >> 8 ), static_cast<sal_uInt8>( nB >> 8 ) );
}

void PictReader::ReadRectangle(tools::Rectangle & rRect)
{
    Point aTopLeft = ReadPoint();
    Point aBottomRight = ReadPoint();
    if (!pPict->good() || aTopLeft.X() > aBottomRight.X() || aTopLeft.Y() > aBottomRight.Y())
    {
        SAL_WARN("filter.pict", "broken rectangle");
        pPict->SetError( SVSTREAM_FILEFORMAT_ERROR );
        rRect = tools::Rectangle();
        return;
    }
    rRect=tools::Rectangle(aTopLeft,aBottomRight);

    SAL_INFO("filter.pict", "ReadRectangle: " << rRect);
}

sal_uInt64 PictReader::ReadPolygon(tools::Polygon & rPoly)
{
    sal_uInt16 nSize(0);
    pPict->ReadUInt16(nSize);
    pPict->SeekRel(8);
    sal_uInt64 nDataSize = static_cast<sal_uInt64>(nSize);
    nSize=(nSize-10)/4;
    const size_t nMaxPossiblePoints = pPict->remainingSize() / 2 * sizeof(sal_uInt16);
    if (nSize > nMaxPossiblePoints)
    {
        SAL_WARN("filter.pict", "pict record claims to have: " << nSize << " points, but only " << nMaxPossiblePoints << " possible, clamping");
        nSize = nMaxPossiblePoints;
    }
    rPoly.SetSize(nSize);
    for (sal_uInt16 i = 0; i < nSize; ++i)
    {
        rPoly.SetPoint(ReadPoint(), i);
        if (!pPict->good())
        {
            rPoly.SetSize(i);
            break;
        }
    }
    return nDataSize;
}

sal_uInt64 PictReader::ReadPixPattern(PictReader::Pattern &pattern)
{
    // Don't know if this is correct because no picture which contains PixPatterns found.
    // Here again the attempt to calculate the size of the date to create simple StarView-Styles
    // from them. Luckily a PixPattern always contains a normal pattern.

    sal_uInt64 nDataSize;

    sal_uInt16 nPatType(0);
    pPict->ReadUInt16(nPatType);
    if (nPatType==1) {
        pattern.read(*pPict);
        Bitmap aBMP;
        nDataSize=ReadPixMapEtc(aBMP,false,true,nullptr,nullptr,false,false);
        // CHANGEME: use average pixmap colors to update the pattern, ...
        if (nDataSize!=0xffffffff) nDataSize+=10;
    }
    else if (nPatType==2) {
        pattern.read(*pPict);
        // RGBColor
        sal_uInt16 nR, nG, nB;
        pPict->ReadUInt16( nR ).ReadUInt16( nG ).ReadUInt16( nB );
        Color col(static_cast<sal_uInt8>( nR >> 8 ), static_cast<sal_uInt8>( nG >> 8 ), static_cast<sal_uInt8>( nB >> 8 ) );
        pattern.setColor(col);
        nDataSize=16;
    }
    else nDataSize=0xffffffff;

    return nDataSize;
}

sal_uInt8 PictReader::ReadAndDrawRect(PictDrawingMethod eMethod)
{
    ReadRectangle(aLastRect);
    ReadAndDrawSameRect(eMethod);
    return 8;
}

sal_uInt8 PictReader::ReadAndDrawSameRect(PictDrawingMethod eMethod)
{
    if (IsInvisible(eMethod)) return 0;
    DrawingMethod(eMethod);
    PictReaderShape::drawRectangle( pVirDev, eMethod == PictDrawingMethod::FRAME, aLastRect, nActPenSize );
    return 0;
}

sal_uInt8 PictReader::ReadAndDrawRoundRect(PictDrawingMethod eMethod)
{
    ReadRectangle(aLastRoundRect);
    ReadAndDrawSameRoundRect(eMethod);
    return 8;
}

sal_uInt8 PictReader::ReadAndDrawSameRoundRect(PictDrawingMethod eMethod)
{
    if (IsInvisible(eMethod)) return 0;
    DrawingMethod(eMethod);
    PictReaderShape::drawRoundRectangle( pVirDev, eMethod == PictDrawingMethod::FRAME, aLastRoundRect, aActOvalSize, nActPenSize );
    return 0;
}

sal_uInt8 PictReader::ReadAndDrawOval(PictDrawingMethod eMethod)
{
    ReadRectangle(aLastOval);
    ReadAndDrawSameOval(eMethod);
    return 8;
}

sal_uInt8 PictReader::ReadAndDrawSameOval(PictDrawingMethod eMethod)
{
    if (IsInvisible(eMethod)) return 0;
    DrawingMethod(eMethod);
    PictReaderShape::drawEllipse( pVirDev, eMethod == PictDrawingMethod::FRAME, aLastOval, nActPenSize );
    return 0;
}

sal_uInt64 PictReader::ReadAndDrawPolygon(PictDrawingMethod eMethod)
{
    sal_uInt64 nDataSize;
    nDataSize=ReadPolygon(aLastPolygon);
    ReadAndDrawSamePolygon(eMethod);
    return nDataSize;
}

sal_uInt8 PictReader::ReadAndDrawSamePolygon(PictDrawingMethod eMethod)
{
    if (IsInvisible(eMethod)) return 0;
    DrawingMethod(eMethod);
    PictReaderShape::drawPolygon( pVirDev, eMethod == PictDrawingMethod::FRAME, aLastPolygon, nActPenSize );
    return 0;
}


sal_uInt8 PictReader::ReadAndDrawArc(PictDrawingMethod eMethod)
{
    ReadRectangle(aLastArcRect);
    ReadAndDrawSameArc(eMethod);
    return 12;
}

sal_uInt8 PictReader::ReadAndDrawSameArc(PictDrawingMethod eMethod)
{
    short nstartAngle, narcAngle;

    pPict->ReadInt16( nstartAngle ).ReadInt16( narcAngle );
    if (!pPict->good() || IsInvisible(eMethod)) return 4;
    DrawingMethod(eMethod);

    if (narcAngle<0) {
        nstartAngle = nstartAngle + narcAngle;
        narcAngle=-narcAngle;
    }
    double fAng1 = basegfx::deg2rad(nstartAngle);
    double fAng2 = basegfx::deg2rad(nstartAngle + narcAngle);
    PictReaderShape::drawArc( pVirDev, eMethod == PictDrawingMethod::FRAME, aLastArcRect, fAng1, fAng2, nActPenSize );
    return 4;
}

sal_uInt64 PictReader::ReadAndDrawRgn(PictDrawingMethod eMethod)
{
    sal_uInt16 nSize(0);
    pPict->ReadUInt16( nSize );

    // read the DATA
    //
    // a region data is a mask and is probably coded as
    // - the first 8 bytes: bdbox ( which can be read by ReadRectangle )
    // - then a list of line modifiers: y_i, a_0, b_0, a_1, b_1, ..., a_{n_i}, b_{n_i}, 0x7fff
    // - 0x7fff
    // where y_i is the increasing sequences of line coordinates
    // and on each line: a0 < b0 < a1 < b1 < ... < a_{n_i} < b_{n_i}

    // it can be probably decoded as :
    // M=an empty mask: ie. (0, 0, ... ) with (left_box-right_box+1) zeroes
    // then for each line (y_i):
    //   - takes M and inverts all values in [a_0,b_0-1], in [a_1,b_1-1] ...
    //   - sets M = new y_i line mask
    ReadAndDrawSameRgn(eMethod);
    return static_cast<sal_uInt64>(nSize);
}

sal_uInt8 PictReader::ReadAndDrawSameRgn(PictDrawingMethod eMethod)
{
    if (IsInvisible(eMethod)) return 0;
    DrawingMethod(eMethod);
    // DISPLAY: ...???...
    return 0;
}

void PictReader::DrawingMethod(PictDrawingMethod eMethod)
{
    if( eActMethod==eMethod ) return;
    switch (eMethod) {
        case PictDrawingMethod::FRAME:
            if (eActPenPattern.isDefault())
              SetLineColor( aActForeColor );
            else
              SetLineColor(eActPenPattern.getColor(aActBackColor, aActForeColor));
            pVirDev->SetFillColor();
            pVirDev->SetRasterOp(eActROP);
            break;
        case PictDrawingMethod::PAINT:
            pVirDev->SetLineColor();
            if (eActPenPattern.isDefault())
              SetFillColor( aActForeColor );
            else
              SetFillColor(eActPenPattern.getColor(aActBackColor, aActForeColor));
            pVirDev->SetRasterOp(eActROP);
            break;
        case PictDrawingMethod::ERASE:
            pVirDev->SetLineColor();
            if (eActBackPattern.isDefault())
              SetFillColor( aActBackColor );// Osnola: previously aActForeColor
            else // checkMe
              SetFillColor(eActBackPattern.getColor(COL_BLACK, aActBackColor));
            pVirDev->SetRasterOp(RasterOp::OverPaint);
            break;
        case PictDrawingMethod::INVERT: // checkme
            pVirDev->SetLineColor();
            SetFillColor( COL_BLACK );
            pVirDev->SetRasterOp(RasterOp::Invert);
            break;
        case PictDrawingMethod::FILL:
            pVirDev->SetLineColor();
            if (eActFillPattern.isDefault())
              SetFillColor( aActForeColor );
            else
              SetFillColor(eActFillPattern.getColor(aActBackColor, aActForeColor));
            pVirDev->SetRasterOp(RasterOp::OverPaint);
            break;
        case PictDrawingMethod::TEXT:
            aActFont.SetColor(aActForeColor);
            aActFont.SetFillColor(aActBackColor);
            aActFont.SetTransparent(true);
            pVirDev->SetFont(aActFont);
            pVirDev->SetRasterOp(RasterOp::OverPaint);
            break;
        default:
            break;  // -Wall undefined not handled...
    }
    eActMethod=eMethod;
}

sal_uInt64 PictReader::ReadAndDrawText()
{
    char        sText[256];

    char nByteLen(0);
    pPict->ReadChar(nByteLen);
    sal_uInt32 nLen = static_cast<sal_uInt32>(nByteLen)&0x000000ff;
    sal_uInt32 nDataLen = nLen + 1;
    nLen = pPict->ReadBytes(&sText, nLen);

    if (IsInvisible( PictDrawingMethod::TEXT )) return nDataLen;
    DrawingMethod( PictDrawingMethod::TEXT );

    // remove annoying control characters:
    while ( nLen > 0 && static_cast<unsigned char>(sText[ nLen - 1 ]) < 32 )
            nLen--;
    sText[ nLen ] = 0;
    OUString aString( sText, strlen(sText), aActFont.GetCharSet());
    pVirDev->DrawText( Point( aTextPosition.X(), aTextPosition.Y() ), aString );
    return nDataLen;
}

sal_uInt64 PictReader::ReadPixMapEtc( Bitmap &rBitmap, bool bBaseAddr, bool bColorTable, tools::Rectangle* pSrcRect,
                                    tools::Rectangle* pDestRect, bool bMode, bool bMaskRgn )
{
    std::unique_ptr<vcl::bitmap::RawBitmap> pBitmap;
    sal_uInt16 nPackType(0), nPixelSize(0), nCmpCount(0), nCmpSize(0);
    sal_uInt8  nDat(0), nRed(0), nGreen(0), nBlue(0);

    // The calculation of nDataSize is considering the size of the whole data.
    size_t nDataSize = 0;

    // conditionally skip BaseAddr
    if ( bBaseAddr )
    {
        pPict->SeekRel( 4 );
        nDataSize += 4;
    }

    // Read PixMap or Bitmap structure;
    sal_uInt16 nRowBytes(0), nBndX(0), nBndY(0), nWidth(0), nHeight(0);
    pPict->ReadUInt16(nRowBytes).ReadUInt16(nBndY).ReadUInt16(nBndX).ReadUInt16(nHeight).ReadUInt16(nWidth);
    if (nBndY > nHeight)
        return 0xffffffff;
    nHeight = nHeight - nBndY;
    if (nHeight == 0)
        return 0xffffffff;
    if (nBndX > nWidth)
        return 0xffffffff;
    nWidth = nWidth - nBndX;
    if (nWidth == 0)
        return 0xffffffff;

    std::vector<Color> aPalette;
    const bool bNotMonoChrome = (nRowBytes & 0x8000) != 0;
    if (bNotMonoChrome)
    {   // it is a PixMap
        nRowBytes &= 0x3fff;
        sal_uInt16 nVersion;
        sal_uInt32 nPackSize;
        sal_uInt16 nPixelType;
        sal_uInt32 nPlaneBytes;
        sal_uInt32 nHRes, nVRes;
        pPict->ReadUInt16( nVersion ).ReadUInt16( nPackType ).ReadUInt32( nPackSize ).ReadUInt32( nHRes ).ReadUInt32( nVRes ).ReadUInt16( nPixelType ).ReadUInt16( nPixelSize ).ReadUInt16( nCmpCount ).ReadUInt16( nCmpSize ).ReadUInt32( nPlaneBytes );

        pPict->SeekRel( 8 );
        nDataSize += 46;

        if ( bColorTable )
        {
            pPict->SeekRel( 6 );
            sal_uInt16 nColTabSize(0);
            pPict->ReadUInt16(nColTabSize);

            if (nColTabSize > 255)
                return 0xffffffff;

            ++nColTabSize;

            aPalette.resize(nColTabSize);

            for (size_t i = 0; i < nColTabSize; ++i)
            {
                pPict->SeekRel(2);
                sal_uInt8 nDummy;
                pPict->ReadUChar( nRed ).ReadUChar( nDummy ).ReadUChar( nGreen ).ReadUChar( nDummy ).ReadUChar( nBlue ).ReadUChar( nDummy );
                aPalette[i] = Color(nRed, nGreen, nBlue);
            }

            nDataSize += 8 + nColTabSize * 8;
        }
    }
    else
    {
        nRowBytes &= 0x3fff;
        nPixelSize = nCmpCount = 1;
        nDataSize += 10;
        aPalette.resize(2);
        aPalette[0] = Color(0xff, 0xff, 0xff);
        aPalette[1] = Color(0, 0, 0);
    }

    // conditionally read source rectangle:
    if ( pSrcRect != nullptr)
    {
        sal_uInt16  nTop, nLeft, nBottom, nRight;
        pPict->ReadUInt16( nTop ).ReadUInt16( nLeft ).ReadUInt16( nBottom ).ReadUInt16( nRight );
        *pSrcRect = tools::Rectangle(nLeft, nTop, nRight, nBottom);
        nDataSize += 8;
    }

    // conditionally read destination rectangle:
    if ( pDestRect != nullptr )
    {
        Point aTL = ReadPoint();
        Point aBR = ReadPoint();
        *pDestRect = tools::Rectangle( aTL, aBR );
        nDataSize += 8;
    }

    // conditionally read mode (or skip it):
    if ( bMode )
    {
        pPict->SeekRel(2);
        nDataSize += 2;
    }

    // conditionally read region (or skip it):
    if ( bMaskRgn )
    {
        sal_uInt16 nSize(0);
        pPict->ReadUInt16( nSize );
        pPict->SeekRel( nSize - 2 );
        nDataSize += nSize;
    }

    // read and write Bitmap bits:
    if ( nPixelSize == 1 || nPixelSize == 2 || nPixelSize == 4 || nPixelSize == 8 )
    {
        sal_uInt16  nSrcBPL, nDestBPL;
        size_t nCount;

        if      ( nPixelSize == 1 ) nSrcBPL = ( nWidth + 7 ) >> 3;
        else if ( nPixelSize == 2 ) nSrcBPL = ( nWidth + 3 ) >> 2;
        else if ( nPixelSize == 4 ) nSrcBPL = ( nWidth + 1 ) >> 1;
        else                        nSrcBPL = nWidth;
        nDestBPL = ( nSrcBPL + 3 ) & 0xfffc;
        if (!nRowBytes || nRowBytes < nSrcBPL || nRowBytes > nDestBPL)
            return 0xffffffff;

        if (nRowBytes < 8 || nPackType == 1)
        {
            if (nHeight > pPict->remainingSize() / (sizeof(sal_uInt8) * nRowBytes))
                return 0xffffffff;
        }
        else
        {
            size_t nByteCountSize = nRowBytes > 250 ? sizeof(sal_uInt16) : sizeof(sal_uInt8);
            if (nHeight > pPict->remainingSize() / nByteCountSize)
                return 0xffffffff;
        }

        pBitmap.reset(new vcl::bitmap::RawBitmap( Size(nWidth, nHeight), 24 ));

        for (sal_uInt16 ny = 0; ny < nHeight; ++ny)
        {
            sal_uInt16 nx = 0;
            if ( nRowBytes < 8 || nPackType == 1 )
            {
                for (size_t i = 0; i < nRowBytes; ++i)
                {
                    pPict->ReadUChar( nDat );
                    if ( nx < nWidth )
                        SetByte(nx, ny, *pBitmap, nPixelSize, nDat, nWidth, aPalette);
                }
                nDataSize += nRowBytes;
            }
            else
            {
                sal_uInt16 nByteCount(0);
                if ( nRowBytes > 250 )
                {
                    pPict->ReadUInt16( nByteCount );
                    nDataSize += 2 + static_cast<sal_uInt32>(nByteCount);
                }
                else
                {
                    sal_uInt8 nByteCountAsByte(0);
                    pPict->ReadUChar( nByteCountAsByte );
                    nByteCount = static_cast<sal_uInt16>(nByteCountAsByte) & 0x00ff;
                    nDataSize += 1 + nByteCount;
                }

                while (pPict->good() && nByteCount)
                {
                    sal_uInt8 nFlagCounterByte(0);
                    pPict->ReadUChar(nFlagCounterByte);
                    if ( ( nFlagCounterByte & 0x80 ) == 0 )
                    {
                        nCount = static_cast<sal_uInt16>(nFlagCounterByte) + 1;
                        for (size_t i = 0; i < nCount; ++i)
                        {
                            pPict->ReadUChar( nDat );
                            if ( nx < nWidth )
                                SetByte(nx, ny, *pBitmap, nPixelSize, nDat, nWidth, aPalette);
                        }
                        nByteCount -= 1 + nCount;
                    }
                    else
                    {
                        nCount = static_cast<sal_uInt16>( 1 - sal_Int16( static_cast<sal_uInt16>(nFlagCounterByte) | 0xff00 ) );
                        pPict->ReadUChar( nDat );
                        for (size_t i = 0; i < nCount; ++i)
                        {
                            if ( nx < nWidth )
                                SetByte(nx, ny, *pBitmap, nPixelSize, nDat, nWidth, aPalette);
                        }
                        nByteCount -= 2;
                    }
                }
            }
        }
    }
    else if ( nPixelSize == 16 )
    {
        sal_uInt8   nByteCountAsByte, nFlagCounterByte;
        sal_uInt16  nByteCount, nCount, nD;
        sal_uInt64   nSrcBitsPos;

        if (nWidth > nRowBytes / 2)
            return 0xffffffff;

        if (nRowBytes < 8 || nPackType == 1)
        {
            if (nHeight > pPict->remainingSize() / (sizeof(sal_uInt8) * nRowBytes))
                return 0xffffffff;
        }
        else
        {
            size_t nByteCountSize = nRowBytes > 250 ? sizeof(sal_uInt16) : sizeof(sal_uInt8);
            if (nHeight > pPict->remainingSize() / nByteCountSize)
                return 0xffffffff;
        }

        pBitmap.reset(new vcl::bitmap::RawBitmap( Size(nWidth, nHeight), 24 ));

        for (sal_uInt16 ny = 0; ny < nHeight; ++ny)
        {
            sal_uInt16 nx = 0;
            if ( nRowBytes < 8 || nPackType == 1 )
            {
                for (size_t i = 0; i < nWidth; ++i)
                {
                    pPict->ReadUInt16( nD );
                    nRed = static_cast<sal_uInt8>( nD >> 7 );
                    nGreen = static_cast<sal_uInt8>( nD >> 2 );
                    nBlue = static_cast<sal_uInt8>( nD << 3 );
                    pBitmap->SetPixel(ny, nx++, Color(nRed, nGreen, nBlue));
                }
                nDataSize += static_cast<sal_uInt32>(nWidth) * 2;
            }
            else
            {
                nSrcBitsPos = pPict->Tell();
                if ( nRowBytes > 250 )
                {
                    pPict->ReadUInt16( nByteCount );
                    nByteCount += 2;
                }
                else
                {
                    pPict->ReadUChar( nByteCountAsByte );
                    nByteCount = static_cast<sal_uInt16>(nByteCountAsByte) & 0x00ff;
                    nByteCount++;
                }
                while ( nx != nWidth )
                {
                    pPict->ReadUChar( nFlagCounterByte );
                    if ( (nFlagCounterByte & 0x80) == 0)
                    {
                        nCount=static_cast<sal_uInt16>(nFlagCounterByte)+1;
                        if ( nCount + nx > nWidth)
                            nCount = nWidth - nx;
                        if (pPict->remainingSize() < sizeof(sal_uInt16) * nCount)
                            return 0xffffffff;
                        /* SJ: the RLE decoding seems not to be correct here,
                           I don't want to change this until I have a bugdoc for
                           this case. Have a look at 32bit, there I changed the
                           encoding, so that it is used a straight forward array
                         */
                        for (size_t i = 0; i < nCount; ++i)
                        {
                            pPict->ReadUInt16( nD );
                            nRed = static_cast<sal_uInt8>( nD >> 7 );
                            nGreen = static_cast<sal_uInt8>( nD >> 2 );
                            nBlue = static_cast<sal_uInt8>( nD << 3 );
                            pBitmap->SetPixel(ny, nx++, Color(nRed, nGreen, nBlue));
                        }
                    }
                    else
                    {
                        if (pPict->remainingSize() < sizeof(sal_uInt16))
                            return 0xffffffff;
                        nCount=(1-sal_Int16(static_cast<sal_uInt16>(nFlagCounterByte)|0xff00));
                        if ( nCount + nx > nWidth )
                            nCount = nWidth - nx;
                        pPict->ReadUInt16( nD );
                        nRed = static_cast<sal_uInt8>( nD >> 7 );
                        nGreen = static_cast<sal_uInt8>( nD >> 2 );
                        nBlue = static_cast<sal_uInt8>( nD << 3 );
                        for (size_t i = 0; i < nCount; ++i)
                        {
                            pBitmap->SetPixel(ny, nx++, Color(nRed, nGreen, nBlue));
                        }
                    }
                }
                nDataSize += nByteCount;
                pPict->Seek(nSrcBitsPos+nByteCount);
            }
        }
    }
    else if ( nPixelSize == 32 )
    {
        sal_uInt16          nByteCount;
        size_t              nCount;
        sal_uInt64           nSrcBitsPos;
        if ( nRowBytes != 4*nWidth )
            return 0xffffffff;

        if ( nRowBytes < 8 || nPackType == 1 )
        {
            const size_t nMaxPixels = pPict->remainingSize() / 4;
            const size_t nMaxRows = nMaxPixels / nWidth;
            if (nHeight > nMaxRows)
                return 0xffffffff;
            const size_t nMaxCols = nMaxPixels / nHeight;
            if (nWidth > nMaxCols)
                return 0xffffffff;

            pBitmap.reset(new vcl::bitmap::RawBitmap( Size(nWidth, nHeight), 24 ));

            for (sal_uInt16 ny = 0; ny < nHeight; ++ny)
            {
                for (sal_uInt16 nx = 0; nx < nWidth; ++nx)
                {
                    sal_uInt8 nDummy;
                    pPict->ReadUChar( nDummy ).ReadUChar( nRed ).ReadUChar( nGreen ).ReadUChar( nBlue );
                    pBitmap->SetPixel(ny, nx, Color(nRed, nGreen, nBlue));
                }
                nDataSize += static_cast<sal_uInt32>(nWidth) * 4;
            }
        }
        else if ( nPackType == 2 )
        {
            const size_t nMaxPixels = pPict->remainingSize() / 3;
            const size_t nMaxRows = nMaxPixels / nWidth;
            if (nHeight > nMaxRows)
                return 0xffffffff;
            const size_t nMaxCols = nMaxPixels / nHeight;
            if (nWidth > nMaxCols)
                return 0xffffffff;

            pBitmap.reset(new vcl::bitmap::RawBitmap( Size(nWidth, nHeight), 24 ));

            for (sal_uInt16 ny = 0; ny < nHeight; ++ny)
            {
                for (sal_uInt16 nx = 0; nx < nWidth; ++nx)
                {
                    pPict->ReadUChar( nRed ).ReadUChar( nGreen ).ReadUChar( nBlue );
                    pBitmap->SetPixel(ny, nx, Color(nRed, nGreen, nBlue));
                }
                nDataSize += static_cast<sal_uInt32>(nWidth) * 3;
            }
        }
        else
        {
            sal_uInt8 nByteCountAsByte;
            sal_uInt8 nFlagCounterByte;
            if ( ( nCmpCount == 3 ) || ( nCmpCount == 4 ) )
            {
                size_t nByteCountSize = nRowBytes > 250 ? sizeof(sal_uInt16) : sizeof(sal_uInt8);
                if (nHeight > pPict->remainingSize() / nByteCountSize)
                    return 0xffffffff;

                pBitmap.reset(new vcl::bitmap::RawBitmap( Size(nWidth, nHeight), 24 ));

                // cid#1458434 to sanitize Untrusted loop bound
                nWidth = pBitmap->Width();

                size_t nByteWidth = static_cast<size_t>(nWidth) * nCmpCount;
                std::vector<sal_uInt8> aScanline(nByteWidth);
                for (sal_uInt16 ny = 0; ny < nHeight; ++ny)
                {
                    nSrcBitsPos = pPict->Tell();
                    if ( nRowBytes > 250 )
                    {
                        pPict->ReadUInt16( nByteCount );
                        nByteCount += 2;
                    }
                    else
                    {
                        pPict->ReadUChar( nByteCountAsByte );
                        nByteCount = nByteCountAsByte;
                        nByteCount++;
                    }
                    size_t i = 0;
                    while (i < aScanline.size())
                    {
                        pPict->ReadUChar( nFlagCounterByte );
                        if ( ( nFlagCounterByte & 0x80 ) == 0)
                        {
                            nCount = static_cast<sal_uInt16>(nFlagCounterByte) + 1;
                            if ((i + nCount) > aScanline.size())
                                nCount = aScanline.size() - i;
                            if (pPict->remainingSize() < nCount)
                                return 0xffffffff;
                            while (nCount > 0)
                            {
                                pPict->ReadUChar( nDat );
                                aScanline[ i++ ] = nDat;
                                --nCount;
                            }
                        }
                        else
                        {
                            if (pPict->remainingSize() < 1)
                                return 0xffffffff;
                            nCount = ( 1 - sal_Int16( static_cast<sal_uInt16>(nFlagCounterByte) | 0xff00 ) );
                            if (( i + nCount) > aScanline.size())
                                nCount = aScanline.size() - i;
                            pPict->ReadUChar( nDat );
                            while (nCount > 0)
                            {
                                aScanline[ i++ ] = nDat;
                                --nCount;
                            }
                        }
                    }
                    sal_uInt8* pTmp = aScanline.data();
                    if ( nCmpCount == 4 )
                        pTmp += nWidth;
                    for (sal_uInt16 nx = 0; nx < nWidth; pTmp++)
                        pBitmap->SetPixel(ny, nx++, Color(*pTmp, pTmp[ nWidth ], pTmp[ 2 * nWidth ]));
                    nDataSize += nByteCount;
                    pPict->Seek( nSrcBitsPos + nByteCount );
                }
            }
        }
    }
    else
        return 0xffffffff;
    rBitmap = vcl::bitmap::CreateFromData(std::move(*pBitmap));
    return nDataSize;
}

void PictReader::ReadHeader()
{
    short y1,x1,y2,x2;

    char        sBuf[ 2 ];
    // previous code considers pPict->Tell() as the normal starting position,
    // nStartPos can be != 0 f.e. a pict embedded in a microsoft word document
    sal_uInt64   nStartPos = pPict->Tell();
    // Standard:
    // a picture file begins by 512 bytes (reserved to the application) followed by the picture data
    // while clipboard, pictures stored in a document often contain only the picture data.

    // Special cases:
    // - some Pict v.1 use 0x00 0x11 0x01 ( instead of 0x11 0x01) to store the version op
    //    (we consider here this as another standard for Pict. v.1 )
    // - some files seem to contain extra garbage data at the beginning
    // - some picture data seem to contain extra NOP opcode(0x00) between the bounding box and the version opcode

    // This code looks hard to find a picture header, ie. it looks at positions
    //   - nStartPos+0, nStartPos+512 with potential extra NOP codes between bdbox and version (at most 9 extra NOP)
    //   - 512..1024 with more strict bdbox checking and no extra NOP codes

    // Notes:
    // - if the header can begin at nStartPos+0 and at nStartPos+512, we try to choose the more
    //       <<probable>> ( using the variable confidence)
    // - svtools/source/filter.vcl/filter/{filter.cxx,filter2.cxx} only check for standard Pict,
    //       this may cause future problems
    int st;
    sal_uInt32 nOffset;
    int confidence[2] = { 0, 0};
    for ( st = 0; st < 3 + 513; st++ )
    {
        int actualConfid = 20; // the actual confidence
        pPict->ResetError();
        if (st < 2) nOffset = nStartPos+st*512;
        else if (st == 2) {
          // choose nStartPos+0 or nStartPos+512 even if there are a little dubious
          int actPos = -1, actConf=0;
          if (confidence[0] > 0) { actPos = 0; actConf =  confidence[0]; }
          if (confidence[1] > 0 && confidence[1] >= actConf) actPos = 1;
          if (actPos < 0) continue;
          nOffset = nStartPos+actPos*512;
        }
        else {
          nOffset = nStartPos+509+st;
          // a small test to check if versionOp code exists after the bdbox ( with no extra NOP codes)
          pPict->Seek(nOffset+10);
          pPict->ReadBytes(sBuf, 2);
          if (!pPict->good()) break;
          if (sBuf[0] == 0x11 || (sBuf[0] == 0x00 && sBuf[1] == 0x11)) ; // maybe ok
          else continue;
        }
        pPict->Seek(nOffset);

        // 2 bytes to store size ( version 1 ) ignored
        pPict->SeekRel( 2 );
        pPict->ReadInt16( y1 ).ReadInt16( x1 ).ReadInt16( y2 ).ReadInt16( x2 ); // frame rectangle of the picture
        if (x1 > x2 || y1 > y2) continue; // bad bdbox
        if (x1 < -2048 || x2 > 2048 || y1 < -2048 || y2 > 2048 || // origin|dest is very small|large
        (x1 == x2 && y1 == y2) ) // 1 pixel pict is dubious
          actualConfid-=3;
        else if (x2 < x1+8 || y2 < y1+8) // a little dubious
          actualConfid-=1;
        if (st >= 3 && actualConfid != 20) continue;
        aBoundingRect=tools::Rectangle( x1,y1, x2, y2 );

        if (!pPict->good()) continue;
        // read version
        pPict->ReadBytes(sBuf, 2);
        // version 1 file
        if ( sBuf[ 0 ] == 0x11 && sBuf[ 1 ] == 0x01 ) {
          // pict v1 must be rare and we do only few tests
          if (st < 2) { confidence[st] = --actualConfid; continue; }
          IsVersion2 = false; return;
        }
        if (sBuf[0] != 0x00) continue; // unrecoverable error
        int numZero = 0;
        do
        {
            numZero++;
            pPict->SeekRel(-1);
            pPict->ReadBytes(sBuf, 2);
        }
        while ( sBuf[0] == 0x00 && numZero < 10);
        actualConfid -= (numZero-1); // extra nop are dubious
        if (!pPict->good()) continue;
        if (sBuf[0] != 0x11) continue; // not a version opcode
        // abnormal version 1 file
        if (sBuf[1] == 0x01 ) {
          // pict v1 must be rare and we do only few tests
          if (st < 2) { confidence[st] = --actualConfid; continue; }
          IsVersion2 = false; return;
        }
        if (sBuf[1] != 0x02 ) continue; // not a version 2 file

        IsVersion2=true;
        short   nExtVer, nReserved;
        // 3 Bytes ignored : end of version arg 0x02FF (ie: 0xFF), HeaderOp : 0x0C00
        pPict->SeekRel( 3 );
        pPict->ReadInt16( nExtVer ).ReadInt16( nReserved );
        if (!pPict->good()) continue;

        if ( nExtVer == -2 ) // extended version 2 picture
        {
            sal_Int32 nHResFixed, nVResFixed;
            pPict->ReadInt32( nHResFixed ).ReadInt32( nVResFixed );
            pPict->ReadInt16( y1 ).ReadInt16( x1 ).ReadInt16( y2 ).ReadInt16( x2 ); // reading the optimal bounding rect
            if (x1 > x2 || y1 > y2) continue; // bad bdbox
            if (st < 2 && actualConfid != 20) { confidence[st] = actualConfid; continue; }

            double fHRes = nHResFixed;
            fHRes /= 65536;
            double fVRes = nVResFixed;
            fVRes /= 65536;
            aHRes /= fHRes;
            aVRes /= fVRes;
            aBoundingRect=tools::Rectangle( x1,y1, x2, y2 );
            pPict->SeekRel( 4 ); // 4 bytes reserved
            return;
        }
        else if (nExtVer == -1 ) { // basic version 2 picture
          if (st < 2 && actualConfid != 20) { confidence[st] = actualConfid; continue; }
          pPict->SeekRel( 16); // bdbox(4 fixed number)
          pPict->SeekRel(4); // 4 bytes reserved
          return;
        }
    }
    pPict->SetError(SVSTREAM_FILEFORMAT_ERROR);
}

#if OSL_DEBUG_LEVEL > 0
static const char* operationName(sal_uInt16 nOpcode)
{
    // add here whatever makes the debugging easier for you, otherwise you'll
    // see only the operation's opcode
    switch (nOpcode)
    {
        case 0x0001: return "Clip";
        case 0x0003: return "TxFont";
        case 0x0004: return "TxFace";
        case 0x0008: return "PnMode";
        case 0x0009: return "PnPat";
        case 0x000d: return "TxSize";
        case 0x001a: return "RGBFgCol";
        case 0x001d: return "HiliteColor";
        case 0x0020: return "Line";
        case 0x0022: return "ShortLine";
        case 0x0028: return "LongText";
        case 0x0029: return "DHText";
        case 0x002a: return "DVText";
        case 0x002c: return "fontName";
        case 0x002e: return "glyphState";
        case 0x0031: return "paintRect";
        case 0x0038: return "frameSameRect";
        case 0x0070: return "framePoly";
        case 0x0071: return "paintPoly";
        case 0x00a1: return "LongComment";
        default:     return "?";
    }
}
#endif

sal_uInt64 PictReader::ReadData(sal_uInt16 nOpcode)
{
    Point aPoint;
    sal_uInt64 nDataSize=0;
    PictDrawingMethod shapeDMethod = PictDrawingMethod::UNDEFINED;
    switch (nOpcode & 7) {
    case 0: shapeDMethod = PictDrawingMethod::FRAME; break;
    case 1: shapeDMethod = PictDrawingMethod::PAINT; break;
    case 2: shapeDMethod = PictDrawingMethod::ERASE; break;
    case 3: shapeDMethod = PictDrawingMethod::INVERT; break;
    case 4: shapeDMethod = PictDrawingMethod::FILL; break;
    default: break;
    }

#if OSL_DEBUG_LEVEL > 0
    SAL_INFO("filter.pict", "Operation: 0x" << OUString::number(nOpcode, 16) << " [" << operationName(nOpcode) << "]");
#endif

    switch(nOpcode) {

    case 0x0000:   // NOP
        nDataSize=0;
        break;

    case 0x0001: { // Clip
        sal_uInt16 nUSHORT(0);
        tools::Rectangle aRect;
        pPict->ReadUInt16( nUSHORT );
        nDataSize=nUSHORT;
        ReadRectangle(aRect);
        // checkme: do we really want to extend the rectangle here ?
        // I do that because the clipping is often used to clean a region,
        //   before drawing some text and also to draw this text.
        // So using a too small region can lead to clip the end of the text ;
        //   but this can be discussable...
        aRect.setWidth(aRect.getOpenWidth()+1);
        aRect.setHeight(aRect.getOpenHeight()+1);
        pVirDev->SetClipRegion( vcl::Region( aRect ) );
        break;
    }
    case 0x0002:   // BkPat
        nDataSize = eActBackPattern.read(*pPict);
        eActMethod = PictDrawingMethod::UNDEFINED;
        break;

    case 0x0003:   // TxFont
    {
        sal_uInt16 nUSHORT(0);
        pPict->ReadUInt16( nUSHORT );
        if      (nUSHORT <=    1) aActFont.SetFamily(FAMILY_SWISS);
        else if (nUSHORT <=   12) aActFont.SetFamily(FAMILY_DECORATIVE);
        else if (nUSHORT <=   20) aActFont.SetFamily(FAMILY_ROMAN);
        else if (nUSHORT ==   21) aActFont.SetFamily(FAMILY_SWISS);
        else if (nUSHORT ==   22) aActFont.SetFamily(FAMILY_MODERN);
        else if (nUSHORT <= 1023) aActFont.SetFamily(FAMILY_SWISS);
        else                      aActFont.SetFamily(FAMILY_ROMAN);
        aActFont.SetCharSet(GetTextEncoding(nUSHORT));
        eActMethod = PictDrawingMethod::UNDEFINED;
        nDataSize=2;
        break;
    }
    case 0x0004: {  // TxFace
        char nFace(0);
        pPict->ReadChar( nFace );
        if ( (nFace & 0x01)!=0 ) aActFont.SetWeight(WEIGHT_BOLD);
        else                     aActFont.SetWeight(WEIGHT_NORMAL);
        if ( (nFace & 0x02)!=0 ) aActFont.SetItalic(ITALIC_NORMAL);
        else                     aActFont.SetItalic(ITALIC_NONE);
        if ( (nFace & 0x04)!=0 ) aActFont.SetUnderline(LINESTYLE_SINGLE);
        else                     aActFont.SetUnderline(LINESTYLE_NONE);
        if ( (nFace & 0x08)!=0 ) aActFont.SetOutline(true);
        else                     aActFont.SetOutline(false);
        if ( (nFace & 0x10)!=0 ) aActFont.SetShadow(true);
        else                     aActFont.SetShadow(false);
        eActMethod = PictDrawingMethod::UNDEFINED;
        nDataSize=1;
        break;
    }
    case 0x0005:   // TxMode
        nDataSize=2;
        break;

    case 0x0006:   // SpExtra
        nDataSize=4;
        break;

    case 0x0007: { // PnSize
        nActPenSize=ReadSize();
        eActMethod = PictDrawingMethod::UNDEFINED;
        nDataSize=4;
        break;
    }
    case 0x0008:   // PnMode
    {
        sal_uInt16 nUSHORT(0);
        pPict->ReadUInt16( nUSHORT );
        // internal code for postscript command (Quickdraw Reference Drawing B-30,B-34)
        if (nUSHORT==23) eActROP = RasterOp::N1;
        else {
          switch (nUSHORT & 0x0007) {
            case 0: eActROP=RasterOp::OverPaint; break; // Copy
            case 1: eActROP=RasterOp::OverPaint; break; // Or
            case 2: eActROP=RasterOp::Xor;       break; // Xor
            case 3: eActROP=RasterOp::OverPaint; break; // Bic
            case 4: eActROP=RasterOp::Invert;    break; // notCopy
            case 5: eActROP=RasterOp::OverPaint; break; // notOr
            case 6: eActROP=RasterOp::Xor;       break; // notXor
            case 7: eActROP=RasterOp::OverPaint; break; // notBic
          }
        }
        eActMethod = PictDrawingMethod::UNDEFINED;
        nDataSize=2;
        break;
    }
    case 0x0009:   // PnPat
        nDataSize=eActPenPattern.read(*pPict);
        eActMethod = PictDrawingMethod::UNDEFINED;
        break;

    case 0x000a:   // FillPat
        nDataSize=eActFillPattern.read(*pPict);
        eActMethod = PictDrawingMethod::UNDEFINED;
        break;

    case 0x000b:   // OvSize
        aActOvalSize=ReadSize();
        nDataSize=4;
        break;

    case 0x000c:   // Origin
        nDataSize=4;
        break;

    case 0x000d:   // TxSize
    {
        sal_uInt16 nUSHORT(0);
        pPict->ReadUInt16( nUSHORT );
        aActFont.SetFontSize( Size( 0, static_cast<tools::Long>(nUSHORT) ) );
        eActMethod = PictDrawingMethod::UNDEFINED;
        nDataSize=2;
    }
    break;

    case 0x000e:   // FgColor
        aActForeColor=ReadColor();
        eActMethod = PictDrawingMethod::UNDEFINED;
        nDataSize=4;
        break;

    case 0x000f:   // BkColor
        aActBackColor=ReadColor();
        nDataSize=4;
        break;

    case 0x0010:   // TxRatio
        nDataSize=8;
        break;

    case 0x0011:   // VersionOp
        nDataSize=1;
        break;

    case 0x0012:   // BkPixPat
        nDataSize=ReadPixPattern(eActBackPattern);
        eActMethod = PictDrawingMethod::UNDEFINED;
        break;

    case 0x0013:   // PnPixPat
        nDataSize=ReadPixPattern(eActPenPattern);
        eActMethod = PictDrawingMethod::UNDEFINED;
        break;

    case 0x0014:   // FillPixPat
        nDataSize=ReadPixPattern(eActFillPattern);
        eActMethod = PictDrawingMethod::UNDEFINED;
        break;

    case 0x0015:   // PnLocHFrac
        nDataSize=2;
        break;

    case 0x0016:   // ChExtra
        nDataSize=2;
        break;

    case 0x0017:   // Reserved (0 Bytes)
    case 0x0018:   // Reserved (0 Bytes)
    case 0x0019:   // Reserved (0 Bytes)
        nDataSize=0;
        break;

    case 0x001a:   // RGBFgCol
        aActForeColor=ReadRGBColor();
        eActMethod = PictDrawingMethod::UNDEFINED;
        nDataSize=6;
        break;

    case 0x001b:   // RGBBkCol
        aActBackColor=ReadRGBColor();
        eActMethod = PictDrawingMethod::UNDEFINED;
        nDataSize=6;
        break;

    case 0x001c:   // HiliteMode
        nDataSize=0;
        break;

    case 0x001d:   // HiliteColor
        nDataSize=6;
        break;

    case 0x001e:   // DefHilite
        nDataSize=0;
        break;

    case 0x001f:   // OpColor
        nDataSize=6;
        break;

    case 0x0020:   // Line
        aPoint=ReadPoint(); aPenPosition=ReadPoint();
        nDataSize=8;

        if (!pPict->good())
            break;

        if (IsInvisible( PictDrawingMethod::FRAME )) break;
        DrawingMethod( PictDrawingMethod::FRAME );
        PictReaderShape::drawLine(pVirDev, aPoint,aPenPosition, nActPenSize);
        break;

    case 0x0021:   // LineFrom
        aPoint=aPenPosition; aPenPosition=ReadPoint();
        nDataSize=4;

        if (!pPict->good())
            break;

        if (IsInvisible( PictDrawingMethod::FRAME )) break;
        DrawingMethod( PictDrawingMethod::FRAME );
        PictReaderShape::drawLine(pVirDev, aPoint,aPenPosition, nActPenSize);
        break;

    case 0x0022:   // ShortLine
        aPoint=ReadPoint();
        aPenPosition=ReadDeltaH(aPoint);
        aPenPosition=ReadDeltaV(aPenPosition);
        nDataSize=6;

        if (!pPict->good())
            break;

        if ( IsInvisible(PictDrawingMethod::FRAME) ) break;
        DrawingMethod( PictDrawingMethod::FRAME );
        PictReaderShape::drawLine(pVirDev, aPoint,aPenPosition, nActPenSize);
        break;

    case 0x0023:   // ShortLineFrom
        aPoint=aPenPosition;
        aPenPosition=ReadDeltaH(aPoint);
        aPenPosition=ReadDeltaV(aPenPosition);
        nDataSize=2;

        if (!pPict->good())
            break;

        if (IsInvisible( PictDrawingMethod::FRAME )) break;
        DrawingMethod( PictDrawingMethod::FRAME );
        PictReaderShape::drawLine(pVirDev, aPoint,aPenPosition, nActPenSize);
        break;

    case 0x0024:   // Reserved (n Bytes)
    case 0x0025:   // Reserved (n Bytes)
    case 0x0026:   // Reserved (n Bytes)
    case 0x0027:   // Reserved (n Bytes)
    {
        sal_uInt16 nUSHORT(0);
        pPict->ReadUInt16( nUSHORT );
        nDataSize=2+nUSHORT;
        break;
    }
    case 0x0028:   // LongText
        aTextPosition=ReadPoint();
        nDataSize=4+ReadAndDrawText();
        break;

    case 0x0029:   // DHText
        aTextPosition=ReadUnsignedDeltaH(aTextPosition);
        nDataSize=1+ReadAndDrawText();
        break;

    case 0x002a:   // DVText
        aTextPosition=ReadUnsignedDeltaV(aTextPosition);
        nDataSize=1+ReadAndDrawText();
        break;

    case 0x002b:   // DHDVText
        aTextPosition=ReadUnsignedDeltaH(aTextPosition);
        aTextPosition=ReadUnsignedDeltaV(aTextPosition);
        nDataSize=2+ReadAndDrawText();
        break;

    case 0x002c: { // fontName
        sal_uInt16 nUSHORT(0);
        pPict->ReadUInt16( nUSHORT ); nDataSize=nUSHORT+2;
        pPict->ReadUInt16( nUSHORT );
        if      (nUSHORT <=    1) aActFont.SetFamily(FAMILY_SWISS);
        else if (nUSHORT <=   12) aActFont.SetFamily(FAMILY_DECORATIVE);
        else if (nUSHORT <=   20) aActFont.SetFamily(FAMILY_ROMAN);
        else if (nUSHORT ==   21) aActFont.SetFamily(FAMILY_SWISS);
        else if (nUSHORT ==   22) aActFont.SetFamily(FAMILY_MODERN);
        else if (nUSHORT <= 1023) aActFont.SetFamily(FAMILY_SWISS);
        else                      aActFont.SetFamily(FAMILY_ROMAN);
        aActFont.SetCharSet(GetTextEncoding(nUSHORT));
        char nByteLen(0);
        pPict->ReadChar( nByteLen );
        sal_uInt16 nLen = static_cast<sal_uInt16>(nByteLen)&0x00ff;
        char sFName[ 256 ];
        sFName[pPict->ReadBytes(sFName, nLen)] = 0;
        OUString aString( sFName, strlen(sFName), osl_getThreadTextEncoding() );
        aActFont.SetFamilyName( aString );
        eActMethod = PictDrawingMethod::UNDEFINED;
        break;
    }
    case 0x002d:   // lineJustify
        nDataSize=10;
        break;

    case 0x002e:   // glyphState
    {
        sal_uInt16 nUSHORT(0);
        pPict->ReadUInt16( nUSHORT );
        nDataSize=2+nUSHORT;
        break;
    }
    case 0x002f:   // Reserved (n Bytes)
    {
        sal_uInt16 nUSHORT(0);
        pPict->ReadUInt16( nUSHORT );
        nDataSize=2+nUSHORT;
        break;
    }
    case 0x0030:   // frameRect
    case 0x0031:   // paintRect
    case 0x0032:   // eraseRect
    case 0x0033:   // invertRect
    case 0x0034:   // fillRect
        nDataSize=ReadAndDrawRect(shapeDMethod);
        break;

    case 0x0035:   // Reserved (8 Bytes)
    case 0x0036:   // Reserved (8 Bytes)
    case 0x0037:   // Reserved (8 Bytes)
        nDataSize=8;
        break;

    case 0x0038:   // frameSameRect
    case 0x0039:   // paintSameRect
    case 0x003a:   // eraseSameRect
    case 0x003b:   // invertSameRect
    case 0x003c:   // fillSameRect
        nDataSize=ReadAndDrawSameRect(shapeDMethod);
        break;

    case 0x003d:   // Reserved (0 Bytes)
    case 0x003e:   // Reserved (0 Bytes)
    case 0x003f:   // Reserved (0 Bytes)
        nDataSize=0;
        break;

    case 0x0040:   // frameRRect
    case 0x0041:   // paintRRect
    case 0x0042:   // eraseRRect
    case 0x0043:   // invertRRect
    case 0x0044:   // fillRRect
        nDataSize=ReadAndDrawRoundRect(shapeDMethod);
        break;

    case 0x0045:   // Reserved (8 Bytes)
    case 0x0046:   // Reserved (8 Bytes)
    case 0x0047:   // Reserved (8 Bytes)
        nDataSize=8;
        break;

    case 0x0048:   // frameSameRRect
    case 0x0049:   // paintSameRRect
    case 0x004a:   // eraseSameRRect
    case 0x004b:   // invertSameRRect
    case 0x004c:   // fillSameRRect
        nDataSize=ReadAndDrawSameRoundRect(shapeDMethod);
        break;

    case 0x004d:   // Reserved (0 Bytes)
    case 0x004e:   // Reserved (0 Bytes)
    case 0x004f:   // Reserved (0 Bytes)
        nDataSize=0;
        break;

    case 0x0050:   // frameOval
    case 0x0051:   // paintOval
    case 0x0052:   // eraseOval
    case 0x0053:   // invertOval
    case 0x0054:   // fillOval
        nDataSize=ReadAndDrawOval(shapeDMethod);
        break;

    case 0x0055:   // Reserved (8 Bytes)
    case 0x0056:   // Reserved (8 Bytes)
    case 0x0057:   // Reserved (8 Bytes)
        nDataSize=8;
        break;

    case 0x0058:   // frameSameOval
    case 0x0059:   // paintSameOval
    case 0x005a:   // eraseSameOval
    case 0x005b:   // invertSameOval
    case 0x005c:   // fillSameOval
        nDataSize=ReadAndDrawSameOval(shapeDMethod);
        break;

    case 0x005d:   // Reserved (0 Bytes)
    case 0x005e:   // Reserved (0 Bytes)
    case 0x005f:   // Reserved (0 Bytes)
        nDataSize=0;
        break;

    case 0x0060:   // frameArc
    case 0x0061:   // paintArc
    case 0x0062:   // eraseArc
    case 0x0063:   // invertArc
    case 0x0064:   // fillArc
        nDataSize=ReadAndDrawArc(shapeDMethod);
        break;

    case 0x0065:   // Reserved (12 Bytes)
    case 0x0066:   // Reserved (12 Bytes)
    case 0x0067:   // Reserved (12 Bytes)
        nDataSize=12;
        break;

    case 0x0068:   // frameSameArc
    case 0x0069:   // paintSameArc
    case 0x006a:   // eraseSameArc
    case 0x006b:   // invertSameArc
    case 0x006c:   // fillSameArc
        nDataSize=ReadAndDrawSameArc(shapeDMethod);
        break;

    case 0x006d:   // Reserved (4 Bytes)
    case 0x006e:   // Reserved (4 Bytes)
    case 0x006f:   // Reserved (4 Bytes)
        nDataSize=4;
        break;

    case 0x0070:   // framePoly
    case 0x0071:   // paintPoly
    case 0x0072:   // erasePoly
    case 0x0073:   // invertPoly
    case 0x0074:   // fillPoly
        nDataSize=ReadAndDrawPolygon(shapeDMethod);
        break;

    case 0x0075:   // Reserved (Polygon-Size)
    case 0x0076:   // Reserved (Polygon-Size)
    case 0x0077:   // Reserved (Polygon-Size)
    {
        sal_uInt16 nUSHORT(0);
        pPict->ReadUInt16( nUSHORT ); nDataSize=nUSHORT;
        break;
    }
    case 0x0078:   // frameSamePoly
    case 0x0079:   // paintSamePoly
    case 0x007a:   // eraseSamePoly
    case 0x007b:   // invertSamePoly
    case 0x007c:   // fillSamePoly
        nDataSize=ReadAndDrawSamePolygon(shapeDMethod);
        break;

    case 0x007d:   // Reserved (0 Bytes)
    case 0x007e:   // Reserved (0 Bytes)
    case 0x007f:   // Reserved (0 Bytes)
        nDataSize=0;
        break;

    case 0x0080:   // frameRgn
    case 0x0081:   // paintRgn
    case 0x0082:   // eraseRgn
    case 0x0083:   // invertRgn
    case 0x0084:   // fillRgn
        nDataSize=ReadAndDrawRgn(shapeDMethod);
        break;

    case 0x0085:   // Reserved (Region-Size)
    case 0x0086:   // Reserved (Region-Size)
    case 0x0087:   // Reserved (Region-Size)
    {
        sal_uInt16 nUSHORT(0);
        pPict->ReadUInt16( nUSHORT ); nDataSize=nUSHORT;
        break;
    }
    case 0x0088:   // frameSameRgn
    case 0x0089:   // paintSameRgn
    case 0x008a:   // eraseSameRgn
    case 0x008b:   // invertSameRgn
    case 0x008c:   // fillSameRgn
        nDataSize=ReadAndDrawSameRgn(shapeDMethod);
        break;

    case 0x008d:   // Reserved (0 Bytes)
    case 0x008e:   // Reserved (0 Bytes)
    case 0x008f:   // Reserved (0 Bytes)
        nDataSize=0;
        break;

    case 0x0090: { // BitsRect
        Bitmap aBmp;
        tools::Rectangle aSrcRect, aDestRect;
        nDataSize=ReadPixMapEtc(aBmp, false, true, &aSrcRect, &aDestRect, true, false);
        DrawingMethod( PictDrawingMethod::PAINT );
        pVirDev->DrawBitmap(aDestRect.TopLeft(),aDestRect.GetSize(),aBmp);
        break;
    }
    case 0x0091: { // BitsRgn
        Bitmap aBmp;
        tools::Rectangle aSrcRect, aDestRect;
        nDataSize=ReadPixMapEtc(aBmp, false, true, &aSrcRect, &aDestRect, true, true);
        DrawingMethod( PictDrawingMethod::PAINT );
        pVirDev->DrawBitmap(aDestRect.TopLeft(),aDestRect.GetSize(),aBmp);
        break;
    }
    case 0x0092:   // Reserved (n Bytes)
    case 0x0093:   // Reserved (n Bytes)
    case 0x0094:   // Reserved (n Bytes)
    case 0x0095:   // Reserved (n Bytes)
    case 0x0096:   // Reserved (n Bytes)
    case 0x0097:   // Reserved (n Bytes)
    {
        sal_uInt16 nUSHORT(0);
        pPict->ReadUInt16( nUSHORT ); nDataSize=2+nUSHORT;
        break;
    }
    case 0x0098: { // PackBitsRect
        Bitmap aBmp;
        tools::Rectangle aSrcRect, aDestRect;
        nDataSize=ReadPixMapEtc(aBmp, false, true, &aSrcRect, &aDestRect, true, false);
        DrawingMethod( PictDrawingMethod::PAINT );
        pVirDev->DrawBitmap(aDestRect.TopLeft(),aDestRect.GetSize(),aBmp);
        break;
    }
    case 0x0099: { // PackBitsRgn
        Bitmap aBmp;
        tools::Rectangle aSrcRect, aDestRect;
        nDataSize=ReadPixMapEtc(aBmp, false, true, &aSrcRect, &aDestRect, true, true);
        DrawingMethod( PictDrawingMethod::PAINT );
        pVirDev->DrawBitmap(aDestRect.TopLeft(),aDestRect.GetSize(),aBmp);
        break;
    }
    case 0x009a: { // DirectBitsRect
        Bitmap aBmp;
        tools::Rectangle aSrcRect, aDestRect;
        nDataSize=ReadPixMapEtc(aBmp, true, false, &aSrcRect, &aDestRect, true, false);
        DrawingMethod( PictDrawingMethod::PAINT );
        pVirDev->DrawBitmap(aDestRect.TopLeft(),aDestRect.GetSize(),aBmp);
        break;
    }
    case 0x009b: { // DirectBitsRgn
        Bitmap aBmp;
        tools::Rectangle aSrcRect, aDestRect;
        nDataSize=ReadPixMapEtc(aBmp, true, false, &aSrcRect, &aDestRect, true, true);
        DrawingMethod( PictDrawingMethod::PAINT );
        pVirDev->DrawBitmap(aDestRect.TopLeft(),aDestRect.GetSize(),aBmp);
        break;
    }
    case 0x009c:   // Reserved (n Bytes)
    case 0x009d:   // Reserved (n Bytes)
    case 0x009e:   // Reserved (n Bytes)
    case 0x009f:   // Reserved (n Bytes)
    {
        sal_uInt16 nUSHORT(0);
        pPict->ReadUInt16( nUSHORT ); nDataSize=2+nUSHORT;
        break;
    }
    case 0x00a0:   // ShortComment
        nDataSize=2;
        break;

    case 0x00a1:   // LongComment
    {
        sal_uInt16 nUSHORT(0);
        pPict->SeekRel(2); pPict->ReadUInt16( nUSHORT ); nDataSize=4+nUSHORT;
        break;
    }
    default: // 0x00a2 bis 0xffff (most times reserved)
        sal_uInt16 nUSHORT(0);
        if      (nOpcode<=0x00af) { pPict->ReadUInt16( nUSHORT ); nDataSize=2+nUSHORT; }
        else if (nOpcode<=0x00cf) { nDataSize=0; }
        else if (nOpcode<=0x00fe) { sal_uInt32 nTemp(0); pPict->ReadUInt32(nTemp) ; nDataSize = nTemp; nDataSize+=4; }
        // Osnola: checkme: in the Quickdraw Ref examples ( for pict v2)
        //         0x00ff(EndOfPict) is also not followed by any data...
        else if (nOpcode==0x00ff) { nDataSize=IsVersion2 ? 2 : 0; } // OpEndPic
        else if (nOpcode<=0x01ff) { nDataSize=2; }
        else if (nOpcode<=0x0bfe) { nDataSize=4; }
        else if (nOpcode<=0x0bff) { nDataSize=22; }
        else if (nOpcode==0x0c00) { nDataSize=24; } // HeaderOp
        else if (nOpcode<=0x7eff) { nDataSize=24; }
        else if (nOpcode<=0x7fff) { nDataSize=254; }
        else if (nOpcode<=0x80ff) { nDataSize=0; }
        else                      { sal_uInt32 nTemp(0); pPict->ReadUInt32(nTemp) ; nDataSize = nTemp; nDataSize+=4; }
    }

    if (nDataSize==0xffffffff) {
        pPict->SetError(SVSTREAM_FILEFORMAT_ERROR);
        return 0;
    }
    return nDataSize;
}

void PictReader::ReadPict( SvStream & rStreamPict, GDIMetaFile & rGDIMetaFile )
{
    try {
    sal_uInt16          nOpcode;
    sal_uInt8           nOneByteOpcode;
    sal_uInt64          nSize;

    pPict               = &rStreamPict;
    nOrigPos            = pPict->Tell();
    SvStreamEndian nOrigNumberFormat = pPict->GetEndian();

    aActForeColor       = COL_BLACK;
    aActBackColor       = COL_WHITE;
    nActPenSize         = Size(1,1);
    eActROP             = RasterOp::OverPaint;
    eActMethod          = PictDrawingMethod::UNDEFINED;
    aActOvalSize        = Size(1,1);

    aActFont.SetCharSet( GetTextEncoding());
    aActFont.SetFamily(FAMILY_SWISS);
    aActFont.SetFontSize(Size(0,12));
    aActFont.SetAlignment(ALIGN_BASELINE);

    aHRes = aVRes = Fraction( 1, 1 );

    pVirDev = VclPtr<VirtualDevice>::Create();
    pVirDev->EnableOutput(false);
    rGDIMetaFile.Record(pVirDev);

    pPict->SetEndian(SvStreamEndian::BIG);

    ReadHeader();

    aPenPosition=Point(-aBoundingRect.Left(),-aBoundingRect.Top());
    aTextPosition=aPenPosition;

    sal_uInt64 nPos=pPict->Tell();

    for (;;) {

        if (IsVersion2 )
            pPict->ReadUInt16( nOpcode );
        else
        {
            pPict->ReadUChar( nOneByteOpcode );
            nOpcode=static_cast<sal_uInt16>(nOneByteOpcode);
        }

        if (pPict->GetError())
            break;

        if (pPict->eof())
        {
            pPict->SetError(SVSTREAM_FILEFORMAT_ERROR);
            break;
        }

        if (nOpcode==0x00ff)
            break;

        nSize=ReadData(nOpcode);

        if ( IsVersion2 )
        {
            if ( nSize & 1 )
                nSize++;

            nPos+=2+nSize;
        }
        else
            nPos+=1+nSize;

        if (!checkSeek(*pPict, nPos))
        {
            pPict->SetError(SVSTREAM_FILEFORMAT_ERROR);
            break;
        }
    }

    pVirDev->SetClipRegion();
    rGDIMetaFile.Stop();
    pVirDev.disposeAndClear();

    rGDIMetaFile.SetPrefMapMode( MapMode( MapUnit::MapInch, Point(), aHRes, aVRes ) );
    rGDIMetaFile.SetPrefSize( aBoundingRect.GetSize() );

    pPict->SetEndian(nOrigNumberFormat);

    if (pPict->GetError()) pPict->Seek(nOrigPos);
    } catch (...)
    {
        rStreamPict.SetError(SVSTREAM_FILEFORMAT_ERROR);
    }
}

void ReadPictFile(SvStream &rStreamPict, GDIMetaFile& rGDIMetaFile)
{
    PictReader aPictReader;
    aPictReader.ReadPict(rStreamPict, rGDIMetaFile);
}

//================== GraphicImport - the exported function ================

bool ImportPictGraphic( SvStream& rIStm, Graphic & rGraphic)
{
    GDIMetaFile aMTF;
    bool        bRet = false;

    ReadPictFile(rIStm, aMTF);

    if ( !rIStm.GetError() )
    {
        rGraphic = Graphic( aMTF );
        bRet = true;
    }

    return bRet;
}

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