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office-gobmx/emfio/source/reader/wmfreader.cxx
Caolán McNamara b5344daa0c ofz: further limit exttextout to record size is smaller than stream size 
Change-Id: I5f59db9e0c32f601537860d7574044b713d1c39d
Reviewed-on: https://gerrit.libreoffice.org/44696
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
2017-11-14 09:50:29 +01:00

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/* -*- 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 <wmfreader.hxx>
#include <emfreader.hxx>
#include <memory>
#include <boost/optional.hpp>
#include <rtl/crc.h>
#include <rtl/tencinfo.h>
#include <osl/endian.h>
#include <vcl/svapp.hxx>
#include <vcl/dibtools.hxx>
#include <tools/fract.hxx>
#include <o3tl/make_unique.hxx>
#include <vcl/bitmapaccess.hxx>
#include <osl/thread.h>
// MS Windows defines
#define W_META_SETBKCOLOR 0x0201
#define W_META_SETBKMODE 0x0102
#define W_META_SETMAPMODE 0x0103
#define W_META_SETROP2 0x0104
#define W_META_SETRELABS 0x0105
#define W_META_SETPOLYFILLMODE 0x0106
#define W_META_SETSTRETCHBLTMODE 0x0107
#define W_META_SETTEXTCHAREXTRA 0x0108
#define W_META_SETTEXTCOLOR 0x0209
#define W_META_SETTEXTJUSTIFICATION 0x020A
#define W_META_SETWINDOWORG 0x020B
#define W_META_SETWINDOWEXT 0x020C
#define W_META_SETVIEWPORTORG 0x020D
#define W_META_SETVIEWPORTEXT 0x020E
#define W_META_OFFSETWINDOWORG 0x020F
#define W_META_SCALEWINDOWEXT 0x0410
#define W_META_OFFSETVIEWPORTORG 0x0211
#define W_META_SCALEVIEWPORTEXT 0x0412
#define W_META_LINETO 0x0213
#define W_META_MOVETO 0x0214
#define W_META_EXCLUDECLIPRECT 0x0415
#define W_META_INTERSECTCLIPRECT 0x0416
#define W_META_ARC 0x0817
#define W_META_ELLIPSE 0x0418
#define W_META_FLOODFILL 0x0419
#define W_META_PIE 0x081A
#define W_META_RECTANGLE 0x041B
#define W_META_ROUNDRECT 0x061C
#define W_META_PATBLT 0x061D
#define W_META_SAVEDC 0x001E
#define W_META_SETPIXEL 0x041F
#define W_META_OFFSETCLIPRGN 0x0220
#define W_META_TEXTOUT 0x0521
#define W_META_BITBLT 0x0922
#define W_META_STRETCHBLT 0x0B23
#define W_META_POLYGON 0x0324
#define W_META_POLYLINE 0x0325
#define W_META_ESCAPE 0x0626
#define W_META_RESTOREDC 0x0127
#define W_META_FILLREGION 0x0228
#define W_META_FRAMEREGION 0x0429
#define W_META_INVERTREGION 0x012A
#define W_META_PAINTREGION 0x012B
#define W_META_SELECTCLIPREGION 0x012C
#define W_META_SELECTOBJECT 0x012D
#define W_META_SETTEXTALIGN 0x012E
#define W_META_DRAWTEXT 0x062F
#define W_META_CHORD 0x0830
#define W_META_SETMAPPERFLAGS 0x0231
#define W_META_EXTTEXTOUT 0x0a32
#define W_META_SETDIBTODEV 0x0d33
#define W_META_SELECTPALETTE 0x0234
#define W_META_REALIZEPALETTE 0x0035
#define W_META_ANIMATEPALETTE 0x0436
#define W_META_SETPALENTRIES 0x0037
#define W_META_POLYPOLYGON 0x0538
#define W_META_RESIZEPALETTE 0x0139
#define W_META_DIBBITBLT 0x0940
#define W_META_DIBSTRETCHBLT 0x0b41
#define W_META_DIBCREATEPATTERNBRUSH 0x0142
#define W_META_STRETCHDIB 0x0f43
#define W_META_EXTFLOODFILL 0x0548
#define W_META_RESETDC 0x014C
#define W_META_STARTDOC 0x014D
#define W_META_STARTPAGE 0x004F
#define W_META_ENDPAGE 0x0050
#define W_META_ABORTDOC 0x0052
#define W_META_ENDDOC 0x005E
#define W_META_DELETEOBJECT 0x01f0
#define W_META_CREATEPALETTE 0x00f7
#define W_META_CREATEBRUSH 0x00F8
#define W_META_CREATEPATTERNBRUSH 0x01F9
#define W_META_CREATEPENINDIRECT 0x02FA
#define W_META_CREATEFONTINDIRECT 0x02FB
#define W_META_CREATEBRUSHINDIRECT 0x02FC
#define W_META_CREATEBITMAPINDIRECT 0x02FD
#define W_META_CREATEBITMAP 0x06FE
#define W_META_CREATEREGION 0x06FF
namespace
{
void GetWinExtMax(const Point& rSource, tools::Rectangle& rPlaceableBound, const sal_Int16 nMapMode)
{
Point aSource(rSource);
if (nMapMode == MM_HIMETRIC)
aSource.Y() = -rSource.Y();
if (aSource.X() < rPlaceableBound.Left())
rPlaceableBound.Left() = aSource.X();
if (aSource.X() > rPlaceableBound.Right())
rPlaceableBound.Right() = aSource.X();
if (aSource.Y() < rPlaceableBound.Top())
rPlaceableBound.Top() = aSource.Y();
if (aSource.Y() > rPlaceableBound.Bottom())
rPlaceableBound.Bottom() = aSource.Y();
}
void GetWinExtMax(const tools::Rectangle& rSource, tools::Rectangle& rPlaceableBound, const sal_Int16 nMapMode)
{
GetWinExtMax(rSource.TopLeft(), rPlaceableBound, nMapMode);
GetWinExtMax(rSource.BottomRight(), rPlaceableBound, nMapMode);
}
}
namespace emfio
{
inline Point WmfReader::ReadPoint()
{
short nX = 0, nY = 0;
mpInputStream->ReadInt16( nX ).ReadInt16( nY );
return Point( nX, nY );
}
inline Point WmfReader::ReadYX()
{
short nX = 0, nY = 0;
mpInputStream->ReadInt16( nY ).ReadInt16( nX );
return Point( nX, nY );
}
tools::Rectangle WmfReader::ReadRectangle()
{
Point aBR, aTL;
aBR = ReadYX();
aTL = ReadYX();
aBR.X()--;
aBR.Y()--;
return tools::Rectangle( aTL, aBR );
}
Size WmfReader::ReadYXExt()
{
short nW=0, nH=0;
mpInputStream->ReadInt16( nH ).ReadInt16( nW );
return Size( nW, nH );
}
void WmfReader::ReadRecordParams( sal_uInt16 nFunc )
{
switch( nFunc )
{
case W_META_SETBKCOLOR:
{
SetBkColor( ReadColor() );
}
break;
case W_META_SETBKMODE:
{
sal_uInt16 nDat = 0;
mpInputStream->ReadUInt16( nDat );
SetBkMode( static_cast<BkMode>(nDat) );
}
break;
// !!!
case W_META_SETMAPMODE:
{
sal_Int16 nMapMode = 0;
mpInputStream->ReadInt16( nMapMode );
SetMapMode( nMapMode );
}
break;
case W_META_SETROP2:
{
sal_uInt16 nROP2 = 0;
mpInputStream->ReadUInt16( nROP2 );
SetRasterOp( (WMFRasterOp)nROP2 );
}
break;
case W_META_SETTEXTCOLOR:
{
SetTextColor( ReadColor() );
}
break;
case W_META_SETWINDOWORG:
{
SetWinOrg( ReadYX() );
}
break;
case W_META_SETWINDOWEXT:
{
short nWidth = 0, nHeight = 0;
mpInputStream->ReadInt16( nHeight ).ReadInt16( nWidth );
SetWinExt( Size( nWidth, nHeight ) );
}
break;
case W_META_OFFSETWINDOWORG:
{
short nXAdd = 0, nYAdd = 0;
mpInputStream->ReadInt16( nYAdd ).ReadInt16( nXAdd );
SetWinOrgOffset( nXAdd, nYAdd );
}
break;
case W_META_SCALEWINDOWEXT:
{
short nXNum = 0, nXDenom = 0, nYNum = 0, nYDenom = 0;
mpInputStream->ReadInt16( nYDenom ).ReadInt16( nYNum ).ReadInt16( nXDenom ).ReadInt16( nXNum );
if (!nYDenom || !nXDenom)
{
mpInputStream->SetError( SVSTREAM_FILEFORMAT_ERROR );
break;
}
ScaleWinExt( (double)nXNum / nXDenom, (double)nYNum / nYDenom );
}
break;
case W_META_SETVIEWPORTORG:
case W_META_SETVIEWPORTEXT:
break;
case W_META_OFFSETVIEWPORTORG:
{
short nXAdd = 0, nYAdd = 0;
mpInputStream->ReadInt16( nYAdd ).ReadInt16( nXAdd );
SetDevOrgOffset( nXAdd, nYAdd );
}
break;
case W_META_SCALEVIEWPORTEXT:
{
short nXNum = 0, nXDenom = 0, nYNum = 0, nYDenom = 0;
mpInputStream->ReadInt16( nYDenom ).ReadInt16( nYNum ).ReadInt16( nXDenom ).ReadInt16( nXNum );
if (!nYDenom || !nXDenom)
{
mpInputStream->SetError( SVSTREAM_FILEFORMAT_ERROR );
break;
}
ScaleDevExt( (double)nXNum / nXDenom, (double)nYNum / nYDenom );
}
break;
case W_META_LINETO:
{
LineTo( ReadYX() );
}
break;
case W_META_MOVETO:
{
MoveTo( ReadYX() );
}
break;
case W_META_INTERSECTCLIPRECT:
{
IntersectClipRect( ReadRectangle() );
}
break;
case W_META_RECTANGLE:
{
DrawRect( ReadRectangle() );
}
break;
case W_META_ROUNDRECT:
{
Size aSize( ReadYXExt() );
DrawRoundRect( ReadRectangle(), Size( aSize.Width() / 2, aSize.Height() / 2 ) );
}
break;
case W_META_ELLIPSE:
{
DrawEllipse( ReadRectangle() );
}
break;
case W_META_ARC:
{
Point aEnd( ReadYX() );
Point aStart( ReadYX() );
tools::Rectangle aRect( ReadRectangle() );
aRect.Justify();
DrawArc( aRect, aStart, aEnd );
}
break;
case W_META_PIE:
{
Point aEnd( ReadYX() );
Point aStart( ReadYX() );
tools::Rectangle aRect( ReadRectangle() );
aRect.Justify();
// #i73608# OutputDevice deviates from WMF
// semantics. start==end means full ellipse here.
if( aStart == aEnd )
DrawEllipse( aRect );
else
DrawPie( aRect, aStart, aEnd );
}
break;
case W_META_CHORD:
{
Point aEnd( ReadYX() );
Point aStart( ReadYX() );
tools::Rectangle aRect( ReadRectangle() );
aRect.Justify();
DrawChord( aRect, aStart, aEnd );
}
break;
case W_META_POLYGON:
{
bool bRecordOk = true;
sal_uInt16 nPoints(0);
mpInputStream->ReadUInt16(nPoints);
if (nPoints > mpInputStream->remainingSize() / (2 * sizeof(sal_uInt16)))
{
bRecordOk = false;
}
else
{
tools::Polygon aPoly(nPoints);
for (sal_uInt16 i(0); i < nPoints && mpInputStream->good(); ++i)
aPoly[ i ] = ReadPoint();
DrawPolygon(aPoly, false/*bRecordPath*/);
}
SAL_WARN_IF(!bRecordOk, "vcl.wmf", "polygon record has more points than we can handle");
bRecordOk &= mpInputStream->good();
if (!bRecordOk)
{
mpInputStream->SetError( SVSTREAM_FILEFORMAT_ERROR );
break;
}
}
break;
case W_META_POLYPOLYGON:
{
sal_uInt16 nPolyCount(0);
// Number of polygons:
mpInputStream->ReadUInt16( nPolyCount );
if (nPolyCount && mpInputStream->good())
{
bool bRecordOk = true;
if (nPolyCount > mpInputStream->remainingSize() / sizeof(sal_uInt16))
{
break;
}
// Number of points of each polygon. Determine total number of points
std::unique_ptr<sal_uInt16[]> xPolygonPointCounts(new sal_uInt16[nPolyCount]);
sal_uInt16* pnPoints = xPolygonPointCounts.get();
tools::PolyPolygon aPolyPoly(nPolyCount, nPolyCount);
sal_uInt16 nPoints = 0;
for (sal_uInt16 a = 0; a < nPolyCount && mpInputStream->good(); ++a)
{
mpInputStream->ReadUInt16( pnPoints[a] );
if (pnPoints[a] > SAL_MAX_UINT16 - nPoints)
{
bRecordOk = false;
break;
}
nPoints += pnPoints[a];
}
SAL_WARN_IF(!bRecordOk, "vcl.wmf", "polypolygon record has more polygons than we can handle");
bRecordOk &= mpInputStream->good();
if (!bRecordOk)
{
mpInputStream->SetError( SVSTREAM_FILEFORMAT_ERROR );
break;
}
// Polygon points are:
for (sal_uInt16 a = 0; a < nPolyCount && mpInputStream->good(); ++a)
{
const sal_uInt16 nPointCount(pnPoints[a]);
if (nPointCount > mpInputStream->remainingSize() / (2 * sizeof(sal_uInt16)))
{
bRecordOk = false;
break;
}
std::unique_ptr<Point[]> xPolygonPoints(new Point[nPointCount]);
Point* pPtAry = xPolygonPoints.get();
for(sal_uInt16 b(0); b < nPointCount && mpInputStream->good(); ++b)
{
pPtAry[b] = ReadPoint();
}
aPolyPoly.Insert( tools::Polygon(nPointCount, pPtAry) );
}
bRecordOk &= mpInputStream->good();
if (!bRecordOk)
{
mpInputStream->SetError( SVSTREAM_FILEFORMAT_ERROR );
break;
}
DrawPolyPolygon( aPolyPoly );
}
}
break;
case W_META_POLYLINE:
{
bool bRecordOk = true;
sal_uInt16 nPoints(0);
mpInputStream->ReadUInt16(nPoints);
if (nPoints > mpInputStream->remainingSize() / (2 * sizeof(sal_uInt16)))
{
bRecordOk = false;
}
else
{
tools::Polygon aPoly(nPoints);
for (sal_uInt16 i(0); i < nPoints && mpInputStream->good(); ++i)
aPoly[ i ] = ReadPoint();
DrawPolyLine( aPoly );
}
SAL_WARN_IF(!bRecordOk, "vcl.wmf", "polyline record has more points than we can handle");
bRecordOk &= mpInputStream->good();
if (!bRecordOk)
{
mpInputStream->SetError( SVSTREAM_FILEFORMAT_ERROR );
break;
}
}
break;
case W_META_SAVEDC:
{
Push();
}
break;
case W_META_RESTOREDC:
{
Pop();
}
break;
case W_META_SETPIXEL:
{
const Color aColor = ReadColor();
DrawPixel( ReadYX(), aColor );
}
break;
case W_META_OFFSETCLIPRGN:
{
MoveClipRegion( ReadYXExt() );
}
break;
case W_META_TEXTOUT:
{
sal_uInt16 nLength = 0;
mpInputStream->ReadUInt16( nLength );
if ( nLength )
{
std::unique_ptr<char[]> pChar(new char[ ( nLength + 1 ) &~ 1 ]);
nLength = std::min<sal_uInt64>(nLength, mpInputStream->ReadBytes(pChar.get(), (nLength + 1) &~ 1));
OUString aText( pChar.get(), nLength, GetCharSet() );
pChar.reset();
Point aPosition( ReadYX() );
DrawText( aPosition, aText );
}
}
break;
case W_META_EXTTEXTOUT:
{
mpInputStream->SeekRel(-6);
auto nRecordPos = mpInputStream->Tell();
sal_Int32 nRecordSize = 0;
mpInputStream->ReadInt32( nRecordSize );
mpInputStream->SeekRel(2);
Point aPosition = ReadYX();
sal_uInt16 nLen = 0, nOptions = 0;
mpInputStream->ReadUInt16( nLen ).ReadUInt16( nOptions );
ComplexTextLayoutFlags nTextLayoutMode = ComplexTextLayoutFlags::Default;
if ( nOptions & ETO_RTLREADING )
nTextLayoutMode = ComplexTextLayoutFlags::BiDiRtl | ComplexTextLayoutFlags::TextOriginLeft;
SetTextLayoutMode( nTextLayoutMode );
SAL_WARN_IF( ( nOptions & ( ETO_PDY | ETO_GLYPH_INDEX ) ) != 0, "vcl.wmf", "SJ: ETO_PDY || ETO_GLYPH_INDEX in WMF" );
// output only makes sense if the text contains characters
if (nLen && nRecordSize >= 0)
{
sal_Int32 nOriginalTextLen = nLen;
sal_Int32 nOriginalBlockLen = ( nOriginalTextLen + 1 ) &~ 1;
tools::Rectangle aRect;
if( nOptions & ETO_CLIPPED )
{
const Point aPt1( ReadPoint() );
const Point aPt2( ReadPoint() );
aRect = tools::Rectangle( aPt1, aPt2 );
}
auto nMaxStreamPos = nRecordPos + (nRecordSize << 1);
auto nRemainingSize = std::min(mpInputStream->remainingSize(), nMaxStreamPos - mpInputStream->Tell());
if (nRemainingSize < static_cast<sal_uInt32>(nOriginalBlockLen))
{
SAL_WARN("vcl.wmf", "exttextout record claimed more data than the stream can provide");
nOriginalTextLen = nOriginalBlockLen = nRemainingSize;
}
std::unique_ptr<char[]> pChar(new char[nOriginalBlockLen]);
mpInputStream->ReadBytes(pChar.get(), nOriginalBlockLen);
OUString aText(pChar.get(), nOriginalTextLen, GetCharSet()); // after this conversion the text may contain
sal_Int32 nNewTextLen = aText.getLength(); // less character (japanese version), so the
// dxAry will not fit
if ( nNewTextLen )
{
std::unique_ptr<long[]> pDXAry, pDYAry;
auto nDxArySize = nMaxStreamPos - mpInputStream->Tell();
auto nDxAryEntries = nDxArySize >> 1;
bool bUseDXAry = false;
if ( ( ( nDxAryEntries % nOriginalTextLen ) == 0 ) && ( nNewTextLen <= nOriginalTextLen ) )
{
sal_Int32 i; // needed just outside the for
pDXAry.reset(new long[ nNewTextLen ]);
if ( nOptions & ETO_PDY )
{
pDYAry.reset(new long[ nNewTextLen ]);
}
for (i = 0; i < nNewTextLen; i++ )
{
if ( mpInputStream->Tell() >= nMaxStreamPos )
break;
sal_Int32 nDxCount = 1;
if ( nNewTextLen != nOriginalTextLen )
{
sal_Unicode cUniChar = aText[i];
OString aTmp(&cUniChar, 1, GetCharSet());
if ( aTmp.getLength() > 1 )
{
nDxCount = aTmp.getLength();
}
}
sal_Int16 nDx = 0, nDy = 0;
while ( nDxCount-- )
{
if ( ( mpInputStream->Tell() + 2 ) > nMaxStreamPos )
break;
sal_Int16 nDxTmp = 0;
mpInputStream->ReadInt16(nDxTmp);
nDx += nDxTmp;
if ( nOptions & ETO_PDY )
{
if ( ( mpInputStream->Tell() + 2 ) > nMaxStreamPos )
break;
sal_Int16 nDyTmp = 0;
mpInputStream->ReadInt16(nDyTmp);
nDy += nDyTmp;
}
}
pDXAry[ i ] = nDx;
if ( nOptions & ETO_PDY )
{
pDYAry[i] = nDy;
}
}
if ( i == nNewTextLen )
bUseDXAry = true;
}
if ( pDXAry && bUseDXAry )
DrawText( aPosition, aText, pDXAry.get(), pDYAry.get() );
else
DrawText( aPosition, aText );
}
}
}
break;
case W_META_SELECTOBJECT:
{
sal_Int16 nObjIndex = 0;
mpInputStream->ReadInt16( nObjIndex );
SelectObject( nObjIndex );
}
break;
case W_META_SETTEXTALIGN:
{
sal_uInt16 nAlign = 0;
mpInputStream->ReadUInt16( nAlign );
SetTextAlign( nAlign );
}
break;
case W_META_BITBLT:
{
// 0-3 : nWinROP #93454#
// 4-5 : y offset of source bitmap
// 6-7 : x offset of source bitmap
// 8-9 : used height of source bitmap
// 10-11 : used width of source bitmap
// 12-13 : destination position y (in pixel)
// 14-15 : destination position x (in pixel)
// 16-17 : don't know
// 18-19 : Width Bitmap in Pixel
// 20-21 : Height Bitmap in Pixel
// 22-23 : bytes per scanline
// 24 : planes
// 25 : bitcount
sal_Int32 nWinROP = 0;
sal_uInt16 nSx = 0, nSy = 0, nSxe = 0, nSye = 0, nDontKnow = 0, nWidth = 0, nHeight = 0, nBytesPerScan = 0;
sal_uInt8 nPlanes, nBitCount;
mpInputStream->ReadInt32( nWinROP )
.ReadUInt16( nSy ).ReadUInt16( nSx ).ReadUInt16( nSye ).ReadUInt16( nSxe );
Point aPoint( ReadYX() );
mpInputStream->ReadUInt16( nDontKnow ).ReadUInt16( nWidth ).ReadUInt16( nHeight ).ReadUInt16( nBytesPerScan ).ReadUChar( nPlanes ).ReadUChar( nBitCount );
bool bOk = nWidth && nHeight && nPlanes == 1 && nBitCount == 1;
if (bOk)
{
bOk = nBytesPerScan <= mpInputStream->remainingSize() / nHeight;
}
if (bOk)
{
Bitmap aBmp( Size( nWidth, nHeight ), nBitCount );
Bitmap::ScopedWriteAccess pAcc(aBmp);
if ( pAcc )
{
for (sal_uInt16 y = 0; y < nHeight && mpInputStream->good(); ++y)
{
sal_uInt16 x = 0;
for (sal_uInt16 scan = 0; scan < nBytesPerScan; scan++ )
{
sal_Int8 nEightPixels = 0;
mpInputStream->ReadSChar( nEightPixels );
for (sal_Int8 i = 7; i >= 0; i-- )
{
if ( x < nWidth )
{
pAcc->SetPixelIndex( y, x, (nEightPixels>>i)&1 );
}
x++;
}
}
}
pAcc.reset();
if ( nSye && nSxe &&
( nSx + nSxe <= aBmp.GetSizePixel().Width() ) &&
( nSy + nSye <= aBmp.GetSizePixel().Height() ) )
{
tools::Rectangle aCropRect( Point( nSx, nSy ), Size( nSxe, nSye ) );
aBmp.Crop( aCropRect );
}
tools::Rectangle aDestRect( aPoint, Size( nSxe, nSye ) );
maBmpSaveList.emplace_back(new BSaveStruct(aBmp, aDestRect, nWinROP));
}
}
}
break;
case W_META_STRETCHBLT:
case W_META_DIBBITBLT:
case W_META_DIBSTRETCHBLT:
case W_META_STRETCHDIB:
{
sal_Int32 nWinROP = 0;
sal_uInt16 nSx = 0, nSy = 0, nSxe = 0, nSye = 0, nUsage = 0;
Bitmap aBmp;
mpInputStream->ReadInt32( nWinROP );
if( nFunc == W_META_STRETCHDIB )
mpInputStream->ReadUInt16( nUsage );
// nSye and nSxe is the number of pixels that has to been used
// If they are set to zero, it is as indicator not to scale the bitmap later
if( nFunc == W_META_STRETCHDIB || nFunc == W_META_STRETCHBLT || nFunc == W_META_DIBSTRETCHBLT )
mpInputStream->ReadUInt16( nSye ).ReadUInt16( nSxe );
// nSy and nx is the offset of the first pixel
mpInputStream->ReadUInt16( nSy ).ReadUInt16( nSx );
if( nFunc == W_META_STRETCHDIB || nFunc == W_META_DIBBITBLT || nFunc == W_META_DIBSTRETCHBLT )
{
if ( nWinROP == PATCOPY )
mpInputStream->ReadUInt16( nUsage ); // i don't know anything of this parameter, so its called nUsage
// DrawRect( Rectangle( ReadYX(), aDestSize ), false );
Size aDestSize( ReadYXExt() );
if ( aDestSize.Width() && aDestSize.Height() ) // #92623# do not try to read buggy bitmaps
{
tools::Rectangle aDestRect( ReadYX(), aDestSize );
if ( nWinROP != PATCOPY )
ReadDIB(aBmp, *mpInputStream, false);
// test if it is sensible to crop
if ( nSye && nSxe &&
( nSx + nSxe <= aBmp.GetSizePixel().Width() ) &&
( nSy + nSye <= aBmp.GetSizePixel().Height() ) )
{
tools::Rectangle aCropRect( Point( nSx, nSy ), Size( nSxe, nSye ) );
aBmp.Crop( aCropRect );
}
maBmpSaveList.emplace_back(new BSaveStruct(aBmp, aDestRect, nWinROP));
}
}
}
break;
case W_META_DIBCREATEPATTERNBRUSH:
{
Bitmap aBmp;
sal_uInt32 nRed = 0, nGreen = 0, nBlue = 0, nCount = 1;
sal_uInt16 nFunction = 0;
mpInputStream->ReadUInt16( nFunction ).ReadUInt16( nFunction );
ReadDIB(aBmp, *mpInputStream, false);
Bitmap::ScopedReadAccess pBmp(aBmp);
if ( pBmp )
{
for ( long y = 0; y < pBmp->Height(); y++ )
{
for ( long x = 0; x < pBmp->Width(); x++ )
{
const BitmapColor aColor( pBmp->GetColor( y, x ) );
nRed += aColor.GetRed();
nGreen += aColor.GetGreen();
nBlue += aColor.GetBlue();
}
}
nCount = pBmp->Height() * pBmp->Width();
if ( !nCount )
nCount++;
pBmp.reset();
}
Color aColor( (sal_uInt8)( nRed / nCount ), (sal_uInt8)( nGreen / nCount ), (sal_uInt8)( nBlue / nCount ) );
CreateObject(o3tl::make_unique<WinMtfFillStyle>( aColor, false ));
}
break;
case W_META_DELETEOBJECT:
{
sal_Int16 nIndex = 0;
mpInputStream->ReadInt16( nIndex );
DeleteObject( nIndex );
}
break;
case W_META_CREATEPALETTE:
{
CreateObject();
}
break;
case W_META_CREATEBRUSH:
{
CreateObject(o3tl::make_unique<WinMtfFillStyle>( Color( COL_WHITE ), false ));
}
break;
case W_META_CREATEPATTERNBRUSH:
{
CreateObject(o3tl::make_unique<WinMtfFillStyle>( Color( COL_WHITE ), false ));
}
break;
case W_META_CREATEPENINDIRECT:
{
LineInfo aLineInfo;
sal_uInt16 nStyle = 0;
sal_uInt16 nWidth = 0;
sal_uInt16 nHeight = 0;
mpInputStream->ReadUInt16(nStyle);
mpInputStream->ReadUInt16(nWidth);
mpInputStream->ReadUInt16(nHeight);
if (nWidth > 0)
aLineInfo.SetWidth(nWidth);
bool bTransparent = false;
switch( nStyle & 0xFF )
{
case PS_DASHDOTDOT :
aLineInfo.SetStyle( LineStyle::Dash );
aLineInfo.SetDashCount( 1 );
aLineInfo.SetDotCount( 2 );
break;
case PS_DASHDOT :
aLineInfo.SetStyle( LineStyle::Dash );
aLineInfo.SetDashCount( 1 );
aLineInfo.SetDotCount( 1 );
break;
case PS_DOT :
aLineInfo.SetStyle( LineStyle::Dash );
aLineInfo.SetDashCount( 0 );
aLineInfo.SetDotCount( 1 );
break;
case PS_DASH :
aLineInfo.SetStyle( LineStyle::Dash );
aLineInfo.SetDashCount( 1 );
aLineInfo.SetDotCount( 0 );
break;
case PS_NULL :
bTransparent = true;
aLineInfo.SetStyle( LineStyle::NONE );
break;
default :
case PS_INSIDEFRAME :
case PS_SOLID :
aLineInfo.SetStyle( LineStyle::Solid );
}
switch( nStyle & 0xF00 )
{
case PS_ENDCAP_ROUND :
aLineInfo.SetLineCap( css::drawing::LineCap_ROUND );
break;
case PS_ENDCAP_SQUARE :
aLineInfo.SetLineCap( css::drawing::LineCap_SQUARE );
break;
case PS_ENDCAP_FLAT :
default :
aLineInfo.SetLineCap( css::drawing::LineCap_BUTT );
}
switch( nStyle & 0xF000 )
{
case PS_JOIN_ROUND :
aLineInfo.SetLineJoin ( basegfx::B2DLineJoin::Round );
break;
case PS_JOIN_MITER :
aLineInfo.SetLineJoin ( basegfx::B2DLineJoin::Miter );
break;
case PS_JOIN_BEVEL :
aLineInfo.SetLineJoin ( basegfx::B2DLineJoin::Bevel );
break;
default :
aLineInfo.SetLineJoin ( basegfx::B2DLineJoin::NONE );
}
CreateObject(o3tl::make_unique<WinMtfLineStyle>( ReadColor(), aLineInfo, bTransparent ));
}
break;
case W_META_CREATEBRUSHINDIRECT:
{
sal_uInt16 nStyle = 0;
mpInputStream->ReadUInt16( nStyle );
CreateObject(o3tl::make_unique<WinMtfFillStyle>( ReadColor(), ( nStyle == BS_HOLLOW ) ));
}
break;
case W_META_CREATEFONTINDIRECT:
{
Size aFontSize;
char lfFaceName[LF_FACESIZE+1];
sal_Int16 lfEscapement = 0;
sal_Int16 lfOrientation = 0;
sal_Int16 lfWeight = 0;
LOGFONTW aLogFont;
aFontSize = ReadYXExt();
mpInputStream->ReadInt16( lfEscapement );
mpInputStream->ReadInt16( lfOrientation );
mpInputStream->ReadInt16( lfWeight );
mpInputStream->ReadUChar( aLogFont.lfItalic );
mpInputStream->ReadUChar( aLogFont.lfUnderline );
mpInputStream->ReadUChar( aLogFont.lfStrikeOut );
mpInputStream->ReadUChar( aLogFont.lfCharSet );
mpInputStream->ReadUChar( aLogFont.lfOutPrecision );
mpInputStream->ReadUChar( aLogFont.lfClipPrecision );
mpInputStream->ReadUChar( aLogFont.lfQuality );
mpInputStream->ReadUChar( aLogFont.lfPitchAndFamily );
size_t nRet = mpInputStream->ReadBytes( lfFaceName, LF_FACESIZE );
lfFaceName[nRet] = 0;
aLogFont.lfWidth = aFontSize.Width();
aLogFont.lfHeight = aFontSize.Height();
aLogFont.lfEscapement = lfEscapement;
aLogFont.lfOrientation = lfOrientation;
aLogFont.lfWeight = lfWeight;
rtl_TextEncoding eCharSet;
if ( ( aLogFont.lfCharSet == OEM_CHARSET ) || ( aLogFont.lfCharSet == DEFAULT_CHARSET ) )
eCharSet = osl_getThreadTextEncoding();
else
eCharSet = rtl_getTextEncodingFromWindowsCharset( aLogFont.lfCharSet );
if ( eCharSet == RTL_TEXTENCODING_DONTKNOW )
eCharSet = osl_getThreadTextEncoding();
if ( eCharSet == RTL_TEXTENCODING_SYMBOL )
eCharSet = RTL_TEXTENCODING_MS_1252;
aLogFont.alfFaceName = OUString( lfFaceName, strlen(lfFaceName), eCharSet );
CreateObject(o3tl::make_unique<WinMtfFontStyle>( aLogFont ));
}
break;
case W_META_CREATEBITMAPINDIRECT:
{
CreateObject();
}
break;
case W_META_CREATEBITMAP:
{
CreateObject();
}
break;
case W_META_CREATEREGION:
{
CreateObject();
}
break;
case W_META_EXCLUDECLIPRECT :
{
ExcludeClipRect( ReadRectangle() );
}
break;
case W_META_PATBLT:
{
sal_uInt32 nROP = 0;
WMFRasterOp nOldROP = WMFRasterOp::NONE;
mpInputStream->ReadUInt32( nROP );
Size aSize = ReadYXExt();
nOldROP = SetRasterOp( (WMFRasterOp)nROP );
DrawRect( tools::Rectangle( ReadYX(), aSize ), false );
SetRasterOp( nOldROP );
}
break;
case W_META_SELECTCLIPREGION:
{
sal_Int16 nObjIndex = 0;
mpInputStream->ReadInt16( nObjIndex );
if ( !nObjIndex )
{
tools::PolyPolygon aEmptyPolyPoly;
SetClipPath( aEmptyPolyPoly, RGN_COPY, true );
}
}
break;
case W_META_ESCAPE :
{
// mnRecSize has been checked previously to be greater than 3
sal_uInt64 nMetaRecSize = static_cast< sal_uInt64 >(mnRecSize - 2 ) * 2;
sal_uInt64 nMetaRecEndPos = mpInputStream->Tell() + nMetaRecSize;
// taking care that mnRecSize does not exceed the maximal stream position
if ( nMetaRecEndPos > mnEndPos )
{
mpInputStream->SetError( SVSTREAM_FILEFORMAT_ERROR );
break;
}
if (mnRecSize >= 4 ) // minimal escape length
{
sal_uInt16 nMode = 0, nLen = 0;
mpInputStream->ReadUInt16( nMode )
.ReadUInt16( nLen );
if ( ( nMode == W_MFCOMMENT ) && ( nLen >= 4 ) )
{
sal_uInt32 nNewMagic = 0; // we have to read int32 for
mpInputStream->ReadUInt32( nNewMagic ); // META_ESCAPE_ENHANCED_METAFILE CommentIdentifier
if( nNewMagic == 0x2c2a4f4f && nLen >= 14 )
{
sal_uInt16 nMagic2 = 0;
mpInputStream->ReadUInt16( nMagic2 );
if( nMagic2 == 0x0a ) // 2nd half of magic
{ // continue with private escape
sal_uInt32 nCheck = 0, nEsc = 0;
mpInputStream->ReadUInt32( nCheck )
.ReadUInt32( nEsc );
sal_uInt32 nEscLen = nLen - 14;
if ( nEscLen <= (mnRecSize * 2 ) )
{
#ifdef OSL_BIGENDIAN
sal_uInt32 nTmp = OSL_SWAPDWORD( nEsc );
sal_uInt32 nCheckSum = rtl_crc32( 0, &nTmp, 4 );
#else
sal_uInt32 nCheckSum = rtl_crc32( 0, &nEsc, 4 );
#endif
std::unique_ptr<sal_Int8[]> pData;
if ( ( static_cast< sal_uInt64 >( nEscLen ) + mpInputStream->Tell() ) > nMetaRecEndPos )
{
mpInputStream->SetError( SVSTREAM_FILEFORMAT_ERROR );
break;
}
if ( nEscLen > 0 )
{
pData.reset(new sal_Int8[ nEscLen ]);
mpInputStream->ReadBytes(pData.get(), nEscLen);
nCheckSum = rtl_crc32( nCheckSum, pData.get(), nEscLen );
}
if ( nCheck == nCheckSum )
{
switch( nEsc )
{
case PRIVATE_ESCAPE_UNICODE :
{
// we will use text instead of polygons only if we have the correct font
if ( Application::GetDefaultDevice()->IsFontAvailable( GetFont().GetFamilyName() ) )
{
Point aPt;
OUString aString;
sal_uInt32 nStringLen, nDXCount;
std::unique_ptr<long[]> pDXAry;
SvMemoryStream aMemoryStream( nEscLen );
aMemoryStream.WriteBytes(pData.get(), nEscLen);
aMemoryStream.Seek( STREAM_SEEK_TO_BEGIN );
sal_Int32 nTmpX(0), nTmpY(0);
aMemoryStream.ReadInt32( nTmpX )
.ReadInt32( nTmpY )
.ReadUInt32( nStringLen );
aPt.X() = nTmpX;
aPt.Y() = nTmpY;
if ( ( static_cast< sal_uInt64 >( nStringLen ) * sizeof( sal_Unicode ) ) < ( nEscLen - aMemoryStream.Tell() ) )
{
aString = read_uInt16s_ToOUString(aMemoryStream, nStringLen);
aMemoryStream.ReadUInt32( nDXCount );
if ( ( static_cast< sal_uInt64 >( nDXCount ) * sizeof( sal_Int32 ) ) >= ( nEscLen - aMemoryStream.Tell() ) )
nDXCount = 0;
if ( nDXCount )
pDXAry.reset(new long[ nDXCount ]);
for (sal_uInt32 i = 0; i < nDXCount; i++ )
{
sal_Int32 val;
aMemoryStream.ReadInt32( val);
pDXAry[ i ] = val;
}
aMemoryStream.ReadUInt32(mnSkipActions);
DrawText( aPt, aString, pDXAry.get() );
}
}
}
break;
}
}
}
}
}
else if ( (nNewMagic == static_cast< sal_uInt32 >(0x43464D57)) && (nLen >= 34) && ( (sal_Int32)(nLen + 10) <= (sal_Int32)(mnRecSize * 2) ))
{
sal_uInt32 nComType = 0, nVersion = 0, nFlags = 0, nComRecCount = 0,
nCurRecSize = 0, nRemainingSize = 0, nEMFTotalSize = 0;
sal_uInt16 nCheck = 0;
mpInputStream->ReadUInt32( nComType ).ReadUInt32( nVersion ).ReadUInt16( nCheck ).ReadUInt32( nFlags )
.ReadUInt32( nComRecCount ).ReadUInt32( nCurRecSize )
.ReadUInt32( nRemainingSize ).ReadUInt32( nEMFTotalSize ); // the nRemainingSize is not mentioned in MSDN documentation
// but it seems to be required to read in data produced by OLE
if( nComType == 0x01 && nVersion == 0x10000 && nComRecCount )
{
if( !mnEMFRec)
{ // first EMF comment
mnEMFRecCount = nComRecCount;
mnEMFSize = nEMFTotalSize;
if (mnEMFSize > mpInputStream->remainingSize())
{
SAL_WARN("vcl.wmf", "emf size claims to be larger than remaining data");
mpEMFStream.reset();
}
else
mpEMFStream = o3tl::make_unique<SvMemoryStream>(mnEMFSize, 0);
}
else if( (mnEMFRecCount != nComRecCount ) || (mnEMFSize != nEMFTotalSize ) ) // add additional checks here
{
// total records should be the same as in previous comments
mnEMFRecCount = 0xFFFFFFFF;
mpEMFStream.reset();
}
mnEMFRec++;
if (mpEMFStream && nCurRecSize + 34 > nLen)
{
mnEMFRecCount = 0xFFFFFFFF;
mpEMFStream.reset();
}
if (mpEMFStream && nCurRecSize > mpInputStream->remainingSize())
{
SAL_WARN("vcl.wmf", "emf record size claims to be larger than remaining data");
mnEMFRecCount = 0xFFFFFFFF;
mpEMFStream.reset();
}
if (mpEMFStream)
{
std::vector<sal_Int8> aBuf(nCurRecSize);
sal_uInt32 nCount = mpInputStream->ReadBytes(aBuf.data(), nCurRecSize);
if( nCount == nCurRecSize )
mpEMFStream->WriteBytes(aBuf.data(), nCount);
}
}
}
}
}
}
break;
case W_META_SETRELABS:
case W_META_SETPOLYFILLMODE:
case W_META_SETSTRETCHBLTMODE:
case W_META_SETTEXTCHAREXTRA:
case W_META_SETTEXTJUSTIFICATION:
case W_META_FLOODFILL :
case W_META_FILLREGION:
case W_META_FRAMEREGION:
case W_META_INVERTREGION:
case W_META_PAINTREGION:
case W_META_DRAWTEXT:
case W_META_SETMAPPERFLAGS:
case W_META_SETDIBTODEV:
case W_META_SELECTPALETTE:
case W_META_REALIZEPALETTE:
case W_META_ANIMATEPALETTE:
case W_META_SETPALENTRIES:
case W_META_RESIZEPALETTE:
case W_META_EXTFLOODFILL:
case W_META_RESETDC:
case W_META_STARTDOC:
case W_META_STARTPAGE:
case W_META_ENDPAGE:
case W_META_ABORTDOC:
case W_META_ENDDOC:
break;
}
}
static const long aMaxWidth = 1024;
bool WmfReader::ReadHeader()
{
sal_uInt64 const nStrmPos = mpInputStream->Tell();
sal_uInt32 nPlaceableMetaKey(0);
// if available read the METAFILEHEADER
mpInputStream->ReadUInt32( nPlaceableMetaKey );
if (!mpInputStream->good())
return false;
tools::Rectangle aPlaceableBound;
bool bPlaceable = nPlaceableMetaKey == 0x9ac6cdd7L;
SAL_INFO("vcl.wmf", "Placeable: \"" << (bPlaceable ? "yes" : "no") << "\"");
if (bPlaceable)
{
//TODO do some real error handling here
sal_Int16 nVal;
// Skip reserved bytes
mpInputStream->SeekRel(2);
// BoundRect
mpInputStream->ReadInt16( nVal );
aPlaceableBound.Left() = nVal;
mpInputStream->ReadInt16( nVal );
aPlaceableBound.Top() = nVal;
mpInputStream->ReadInt16( nVal );
aPlaceableBound.Right() = nVal;
mpInputStream->ReadInt16( nVal );
aPlaceableBound.Bottom() = nVal;
// inch
mpInputStream->ReadUInt16( mnUnitsPerInch );
// reserved
mpInputStream->SeekRel( 4 );
// Skip and don't check the checksum
mpInputStream->SeekRel( 2 );
}
else
{
mnUnitsPerInch = 96;
if (mpExternalHeader != nullptr
&& mpExternalHeader->xExt > 0
&& mpExternalHeader->yExt > 0
&& (mpExternalHeader->mapMode == MM_ISOTROPIC || mpExternalHeader->mapMode == MM_ANISOTROPIC))
{
// #n417818#: If we have an external header then overwrite the bounds!
tools::Rectangle aExtRect(0, 0,
(double)mpExternalHeader->xExt * 567 * mnUnitsPerInch / 1440000,
(double)mpExternalHeader->yExt * 567 * mnUnitsPerInch / 1440000);
aPlaceableBound = aExtRect;
SAL_INFO("vcl.wmf", "External header size "
" t: " << aPlaceableBound.Left() << " l: " << aPlaceableBound.Top()
<< " b: " << aPlaceableBound.Right() << " r: " << aPlaceableBound.Bottom());
SetMapMode(mpExternalHeader->mapMode);
}
else
{
mpInputStream->Seek(nStrmPos + 18); // set the streampos to the start of the metaactions
GetPlaceableBound(aPlaceableBound, mpInputStream);
// The image size is not known so normalize the calculated bounds so that the
// resulting image is not too big
const double fMaxWidth = static_cast<double>(aMaxWidth);
if (aPlaceableBound.GetWidth() > aMaxWidth)
{
double fRatio = aPlaceableBound.GetWidth() / fMaxWidth;
aPlaceableBound = tools::Rectangle(
aPlaceableBound.Left() / fRatio,
aPlaceableBound.Top() / fRatio,
aPlaceableBound.Right() / fRatio,
aPlaceableBound.Bottom() / fRatio);
SAL_INFO("vcl.wmf", "Placeable bounds "
" t: " << aPlaceableBound.Left() << " l: " << aPlaceableBound.Top()
<< " b: " << aPlaceableBound.Right() << " r: " << aPlaceableBound.Bottom());
}
}
mpInputStream->Seek( nStrmPos );
}
SetWinOrg( aPlaceableBound.TopLeft() );
Size aWMFSize( labs( aPlaceableBound.GetWidth() ), labs( aPlaceableBound.GetHeight() ) );
SetWinExt( aWMFSize );
SAL_INFO("vcl.wmf", "WMF size w: " << aWMFSize.Width() << " h: " << aWMFSize.Height());
Size aDevExt( 10000, 10000 );
if( ( labs( aWMFSize.Width() ) > 1 ) && ( labs( aWMFSize.Height() ) > 1 ) )
{
const Fraction aFrac( 1, mnUnitsPerInch);
MapMode aWMFMap( MapUnit::MapInch, Point(), aFrac, aFrac );
Size aSize100(OutputDevice::LogicToLogic(aWMFSize, aWMFMap, MapMode(MapUnit::Map100thMM)));
aDevExt = Size( labs( aSize100.Width() ), labs( aSize100.Height() ) );
}
SetDevExt( aDevExt );
SAL_INFO("vcl.wmf", "Dev size w: " << aDevExt.Width() << " h: " << aDevExt.Height());
// read the METAHEADER
sal_uInt32 nMetaKey(0);
mpInputStream->ReadUInt32( nMetaKey ); // type and headersize
if (!mpInputStream->good())
return false;
if (nMetaKey != 0x00090001)
{
sal_uInt16 aNextWord(0);
mpInputStream->ReadUInt16( aNextWord );
if (nMetaKey != 0x10000 || aNextWord != 0x09)
{
mpInputStream->SetError( SVSTREAM_FILEFORMAT_ERROR );
return false;
}
}
mpInputStream->SeekRel( 2 ); // Version (of Windows)
mpInputStream->SeekRel( 4 ); // Size (of file in words)
mpInputStream->SeekRel( 2 ); // NoObjects (maximum number of simultaneous objects)
mpInputStream->SeekRel( 4 ); // MaxRecord (size of largest record in words)
mpInputStream->SeekRel( 2 ); // NoParameters (Unused
return mpInputStream->good();
}
void WmfReader::ReadWMF()
{
sal_uInt16 nFunction;
mnSkipActions = 0;
mnCurrentAction = 0;
mpEMFStream.reset();
mnEMFRecCount = 0;
mnEMFRec = 0;
mnEMFSize = 0;
SetMapMode( MM_ANISOTROPIC );
SetWinOrg( Point() );
SetWinExt( Size( 1, 1 ) );
SetDevExt( Size( 10000, 10000 ) );
mnEndPos=mpInputStream->Seek( STREAM_SEEK_TO_END );
mpInputStream->Seek( mnStartPos );
if ( ReadHeader( ) )
{
auto nPos = mpInputStream->Tell();
if( mnEndPos - mnStartPos )
{
bool bEMFAvailable = false;
while( true )
{
mnCurrentAction++;
mpInputStream->ReadUInt32(mnRecSize).ReadUInt16( nFunction );
if( mpInputStream->GetError()
|| (mnRecSize < 3 )
|| (mnRecSize == 3
&& nFunction == 0
)
|| mpInputStream->IsEof()
)
{
if( mpInputStream->IsEof() )
mpInputStream->SetError( SVSTREAM_FILEFORMAT_ERROR );
break;
}
if ( !bEMFAvailable )
{
if( !maBmpSaveList.empty()
&& ( nFunction != W_META_STRETCHDIB )
&& ( nFunction != W_META_DIBBITBLT )
&& ( nFunction != W_META_DIBSTRETCHBLT )
)
{
ResolveBitmapActions( maBmpSaveList );
}
if ( !mnSkipActions)
ReadRecordParams( nFunction );
else
mnSkipActions--;
if(mpEMFStream && mnEMFRecCount == mnEMFRec)
{
GDIMetaFile aMeta;
mpEMFStream->Seek( 0 );
std::unique_ptr<EmfReader> pEMFReader(o3tl::make_unique<EmfReader>( *mpEMFStream, aMeta ));
bEMFAvailable = pEMFReader->ReadEnhWMF();
pEMFReader.reset(); // destroy first!!!
if( bEMFAvailable )
{
AddFromGDIMetaFile( aMeta );
SetrclFrame( tools::Rectangle( Point(0, 0), aMeta.GetPrefSize()));
// the stream needs to be set to the wmf end position,
// otherwise the GfxLink that is created will be incorrect
// (leading to graphic loss after swapout/swapin).
// so we will proceed normally, but are ignoring further wmf
// records
}
else
{
// something went wrong
// continue with WMF, don't try this again
mpEMFStream.reset();
}
}
}
const sal_uInt32 nAvailableBytes = mnEndPos - nPos;
const sal_uInt32 nMaxPossibleRecordSize = nAvailableBytes/2;
if (mnRecSize <= nMaxPossibleRecordSize)
{
nPos += mnRecSize * 2;
mpInputStream->Seek(nPos);
}
else
mpInputStream->SetError( SVSTREAM_FILEFORMAT_ERROR );
}
}
else
mpInputStream->SetError( SVSTREAM_GENERALERROR );
if( !mpInputStream->GetError() && !maBmpSaveList.empty() )
ResolveBitmapActions( maBmpSaveList );
}
if ( mpInputStream->GetError() )
mpInputStream->Seek( mnStartPos );
}
void WmfReader::GetPlaceableBound( tools::Rectangle& rPlaceableBound, SvStream* pStm )
{
bool bRet = true;
tools::Rectangle aBound;
aBound.Left() = RECT_MAX;
aBound.Top() = RECT_MAX;
aBound.Right() = RECT_MIN;
aBound.Bottom() = RECT_MIN;
bool bBoundsDetermined = false;
auto nPos = pStm->Tell();
auto nEnd = nPos + pStm->remainingSize();
Point aWinOrg(0,0);
boost::optional<Size> aWinExt;
Point aViewportOrg(0,0);
boost::optional<Size> aViewportExt;
if (nEnd - nPos)
{
sal_Int16 nMapMode = MM_ANISOTROPIC;
sal_uInt16 nFunction;
sal_uInt32 nRSize;
while( bRet )
{
pStm->ReadUInt32( nRSize ).ReadUInt16( nFunction );
if( pStm->GetError() )
{
bRet = false;
break;
}
else if ( nRSize==3 && nFunction==0 )
{
break;
}
else if ( nRSize < 3 || pStm->IsEof() )
{
pStm->SetError( SVSTREAM_FILEFORMAT_ERROR );
bRet = false;
break;
}
switch( nFunction )
{
case W_META_SETWINDOWORG:
{
aWinOrg = ReadYX();
}
break;
case W_META_SETWINDOWEXT:
{
sal_Int16 nWidth(0), nHeight(0);
pStm->ReadInt16(nHeight);
pStm->ReadInt16(nWidth);
aWinExt = Size(nWidth, nHeight);
}
break;
case W_META_SETVIEWPORTORG:
{
aViewportOrg = ReadYX();
}
break;
case W_META_SETVIEWPORTEXT:
{
sal_Int16 nWidth(0), nHeight(0);
pStm->ReadInt16(nHeight);
pStm->ReadInt16(nWidth);
aViewportExt = Size(nWidth, nHeight);
}
break;
case W_META_SETMAPMODE :
pStm->ReadInt16( nMapMode );
break;
case W_META_MOVETO:
case W_META_LINETO:
GetWinExtMax( ReadYX(), aBound, nMapMode );
bBoundsDetermined = true;
break;
case W_META_RECTANGLE:
case W_META_INTERSECTCLIPRECT:
case W_META_EXCLUDECLIPRECT :
case W_META_ELLIPSE:
GetWinExtMax( ReadRectangle(), aBound, nMapMode );
bBoundsDetermined = true;
break;
case W_META_ROUNDRECT:
ReadYXExt(); // size
GetWinExtMax( ReadRectangle(), aBound, nMapMode );
bBoundsDetermined = true;
break;
case W_META_ARC:
case W_META_PIE:
case W_META_CHORD:
ReadYX(); // end
ReadYX(); // start
GetWinExtMax( ReadRectangle(), aBound, nMapMode );
bBoundsDetermined = true;
break;
case W_META_POLYGON:
{
bool bRecordOk = true;
sal_uInt16 nPoints(0);
pStm->ReadUInt16( nPoints );
if (nPoints > pStm->remainingSize() / (2 * sizeof(sal_uInt16)))
{
bRecordOk = false;
}
else
{
for(sal_uInt16 i = 0; i < nPoints; i++ )
{
GetWinExtMax( ReadPoint(), aBound, nMapMode );
bBoundsDetermined = true;
}
}
SAL_WARN_IF(!bRecordOk, "vcl.wmf", "polyline record claimed more points than the stream can provide");
if (!bRecordOk)
{
pStm->SetError( SVSTREAM_FILEFORMAT_ERROR );
bRet = false;
break;
}
}
break;
case W_META_POLYPOLYGON:
{
bool bRecordOk = true;
sal_uInt16 nPoly(0), nPoints(0);
pStm->ReadUInt16(nPoly);
if (nPoly > pStm->remainingSize() / sizeof(sal_uInt16))
{
bRecordOk = false;
}
else
{
for(sal_uInt16 i = 0; i < nPoly; i++ )
{
sal_uInt16 nP = 0;
pStm->ReadUInt16( nP );
if (nP > SAL_MAX_UINT16 - nPoints)
{
bRecordOk = false;
break;
}
nPoints += nP;
}
}
SAL_WARN_IF(!bRecordOk, "vcl.wmf", "polypolygon record has more polygons than we can handle");
bRecordOk = bRecordOk && pStm->good();
if (!bRecordOk)
{
pStm->SetError( SVSTREAM_FILEFORMAT_ERROR );
bRet = false;
break;
}
if (nPoints > pStm->remainingSize() / (2 * sizeof(sal_uInt16)))
{
bRecordOk = false;
}
else
{
for (sal_uInt16 i = 0; i < nPoints; i++ )
{
GetWinExtMax( ReadPoint(), aBound, nMapMode );
bBoundsDetermined = true;
}
}
SAL_WARN_IF(!bRecordOk, "vcl.wmf", "polypolygon record claimed more points than the stream can provide");
bRecordOk &= pStm->good();
if (!bRecordOk)
{
pStm->SetError( SVSTREAM_FILEFORMAT_ERROR );
bRet = false;
break;
}
}
break;
case W_META_POLYLINE:
{
bool bRecordOk = true;
sal_uInt16 nPoints(0);
pStm->ReadUInt16(nPoints);
if (nPoints > pStm->remainingSize() / (2 * sizeof(sal_uInt16)))
{
bRecordOk = false;
}
else
{
for (sal_uInt16 i = 0; i < nPoints; ++i)
{
GetWinExtMax( ReadPoint(), aBound, nMapMode );
bBoundsDetermined = true;
}
}
SAL_WARN_IF(!bRecordOk, "vcl.wmf", "polyline record claimed more points than the stream can provide");
if (!bRecordOk)
{
pStm->SetError( SVSTREAM_FILEFORMAT_ERROR );
bRet = false;
break;
}
}
break;
case W_META_SETPIXEL:
{
ReadColor();
GetWinExtMax( ReadYX(), aBound, nMapMode );
bBoundsDetermined = true;
}
break;
case W_META_TEXTOUT:
{
sal_uInt16 nLength;
pStm->ReadUInt16( nLength );
// todo: we also have to take care of the text width
if ( nLength )
{
pStm->SeekRel( ( nLength + 1 ) &~ 1 );
GetWinExtMax( ReadYX(), aBound, nMapMode );
bBoundsDetermined = true;
}
}
break;
case W_META_EXTTEXTOUT:
{
sal_uInt16 nLen, nOptions;
Point aPosition;
aPosition = ReadYX();
pStm->ReadUInt16( nLen ).ReadUInt16( nOptions );
// todo: we also have to take care of the text width
if( nLen )
{
GetWinExtMax( aPosition, aBound, nMapMode );
bBoundsDetermined = true;
}
}
break;
case W_META_BITBLT:
case W_META_STRETCHBLT:
case W_META_DIBBITBLT:
case W_META_DIBSTRETCHBLT:
case W_META_STRETCHDIB:
{
sal_Int32 nWinROP;
sal_uInt16 nSx, nSy, nUsage;
pStm->ReadInt32( nWinROP );
if( nFunction == W_META_STRETCHDIB )
pStm->ReadUInt16( nUsage );
// nSye and nSxe is the number of pixels that has to been used
if( nFunction == W_META_STRETCHDIB || nFunction == W_META_STRETCHBLT || nFunction == W_META_DIBSTRETCHBLT )
{
sal_uInt16 nSxe, nSye;
pStm->ReadUInt16( nSye ).ReadUInt16( nSxe );
}
// nSy and nx is the offset of the first pixel
pStm->ReadUInt16( nSy ).ReadUInt16( nSx );
if( nFunction == W_META_STRETCHDIB || nFunction == W_META_DIBBITBLT || nFunction == W_META_DIBSTRETCHBLT )
{
if ( nWinROP == PATCOPY )
pStm->ReadUInt16( nUsage ); // i don't know anything of this parameter, so its called nUsage
// DrawRect( Rectangle( ReadYX(), aDestSize ), false );
Size aDestSize( ReadYXExt() );
if ( aDestSize.Width() && aDestSize.Height() ) // #92623# do not try to read buggy bitmaps
{
tools::Rectangle aDestRect( ReadYX(), aDestSize );
GetWinExtMax( aDestRect, aBound, nMapMode );
bBoundsDetermined = true;
}
}
}
break;
case W_META_PATBLT:
{
sal_uInt32 nROP;
pStm->ReadUInt32( nROP );
Size aSize = ReadYXExt();
GetWinExtMax( tools::Rectangle( ReadYX(), aSize ), aBound, nMapMode );
bBoundsDetermined = true;
}
break;
}
const auto nAvailableBytes = nEnd - nPos;
const auto nMaxPossibleRecordSize = nAvailableBytes/2;
if (nRSize <= nMaxPossibleRecordSize)
{
nPos += nRSize * 2;
pStm->Seek(nPos);
}
else
{
pStm->SetError( SVSTREAM_FILEFORMAT_ERROR );
bRet = false;
}
}
}
else
{
pStm->SetError( SVSTREAM_GENERALERROR );
bRet = false;
}
if (bRet)
{
if (aWinExt)
{
rPlaceableBound = tools::Rectangle(aWinOrg, *aWinExt);
SAL_INFO("vcl.wmf", "Window dimension "
" t: " << rPlaceableBound.Left() << " l: " << rPlaceableBound.Top()
<< " b: " << rPlaceableBound.Right() << " r: " << rPlaceableBound.Bottom());
}
else if (aViewportExt)
{
rPlaceableBound = tools::Rectangle(aViewportOrg, *aViewportExt);
SAL_INFO("vcl.wmf", "Viewport dimension "
" t: " << rPlaceableBound.Left() << " l: " << rPlaceableBound.Top()
<< " b: " << rPlaceableBound.Right() << " r: " << rPlaceableBound.Bottom());
}
else if (bBoundsDetermined)
{
rPlaceableBound = aBound;
SAL_INFO("vcl.wmf", "Determined dimension "
" t: " << rPlaceableBound.Left() << " l: " << rPlaceableBound.Top()
<< " b: " << rPlaceableBound.Right() << " r: " << rPlaceableBound.Bottom());
}
else
{
rPlaceableBound.Left() = 0;
rPlaceableBound.Top() = 0;
rPlaceableBound.Right() = aMaxWidth;
rPlaceableBound.Bottom() = aMaxWidth;
SAL_INFO("vcl.wmf", "Default dimension "
" t: " << rPlaceableBound.Left() << " l: " << rPlaceableBound.Top()
<< " b: " << rPlaceableBound.Right() << " r: " << rPlaceableBound.Bottom());
}
}
}
WmfReader::WmfReader(SvStream& rStreamWMF, GDIMetaFile& rGDIMetaFile, const WmfExternal* pExternalHeader)
: MtfTools(rGDIMetaFile, rStreamWMF)
, mnUnitsPerInch(96)
, mnRecSize(0)
, mpEMFStream()
, mnEMFRecCount(0)
, mnEMFRec(0)
, mnEMFSize(0)
, mnSkipActions(0)
, mnCurrentAction(0)
, mpExternalHeader(pExternalHeader)
{
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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