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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 <memory>
#include <sal/config.h>
#include <sal/log.hxx>
#include <unotools/configmgr.hxx>
#include <vcl/FilterConfigItem.hxx>
#include <vcl/graph.hxx>
#include <vcl/BitmapTools.hxx>
#include <vcl/animate/Animation.hxx>
#include <tools/fract.hxx>
#include <tools/stream.hxx>
#include "lzwdecom.hxx"
#include "ccidecom.hxx"
namespace {
template< typename T > T BYTESWAP(T nByte) {
return ( nByte << 7 ) | ( ( nByte & 2 ) << 5 ) | ( ( nByte & 4 ) << 3 ) |
( ( nByte & 8 ) << 1 ) | ( ( nByte & 16 ) >> 1 ) |
( ( nByte & 32 ) >> 3 ) | ( ( nByte & 64 ) >> 5 ) |
( ( nByte & 128 ) >> 7 );
}
}
//============================ TIFFReader ==================================
class TIFFReader
{
private:
bool bStatus; // Whether until now no error occurred
Animation aAnimation;
SvStream* pTIFF; // the TIFF file that should be read
std::vector<sal_uInt8> maBitmap;
Size maBitmapPixelSize;
std::vector<Color> mvPalette;
MapMode maBitmapPrefMapMode;
Size maBitmapPrefSize;
sal_uInt16 nDstBitsPerPixel;
int nLargestPixelIndex;
sal_uInt64 nOrigPos; // start position in pTIFF
sal_uInt64 nEndOfFile; // end of file position in pTIFF
sal_uInt16 nDataType;
// Data taken from the TIFF tags:
bool bByteSwap; // sal_True if bits 0..7 -> 7..0 should get converted ( FILLORDER = 2 );
sal_uInt32 nNewSubFile;
sal_uInt32 nSubFile;
sal_Int32 nImageWidth; // picture width in pixels
sal_Int32 nImageLength; // picture height in pixels
sal_uInt32 nBitsPerSample; // bits per pixel per layer
sal_uInt32 nCompression; // kind of compression
sal_uInt32 nPhotometricInterpretation;
sal_uInt32 nThresholding;
sal_uInt32 nCellWidth;
sal_uInt32 nCellLength;
sal_uInt32 nFillOrder;
std::vector<sal_uInt64> aStripOffsets; // field of offsets to the Bitmap-Data-"Strips"
sal_uInt32 nOrientation;
sal_uInt32 nSamplesPerPixel; // number of layers
sal_uInt32 nRowsPerStrip; // if it's not compressed: number of rows per Strip
std::vector<sal_uInt32> aStripByteCounts; // if compressed (in a certain way): size of the strips
sal_uInt32 nMinSampleValue;
sal_uInt32 nMaxSampleValue;
double fXResolution; // X-resolution or 0.0
double fYResolution; // Y-resolution or 0.0
sal_uInt32 nPlanarConfiguration;
sal_uInt32 nGroup3Options;
sal_uInt32 nGroup4Options;
sal_uInt32 nResolutionUnit; // unit of fX/YResolution: 1=unknown, 2(default)=inch, 3=cm
sal_uInt32 nPredictor;
std::vector<sal_uInt32> aColorMap; // color palette
sal_uInt32 nNumColors; // number of colors within the color palette
sal_uInt32 nPlanes; // number of layers within the Tiff file
sal_uInt32 nStripsPerPlane; // number of Strips per layer
sal_uInt32 nBytesPerRow; // Bytes per line per Layer in the Tiff file ( uncompressed )
std::vector<sal_uInt8> aMap[4]; // temporary Scanline
sal_uInt32 DataTypeSize();
sal_uInt32 ReadIntData();
double ReadDoubleData();
void ReadHeader();
void ReadTagData( sal_uInt16 nTagType, sal_uInt32 nDataLen );
sal_uInt8* getMapData(sal_uInt32 np);
bool ReadMap();
// reads/decompresses the bitmap data and fills aMap
sal_uInt32 GetBits(const sal_uInt8 * pSrc, sal_uInt32 nBitsPos, sal_uInt32 nBitsCount);
// fetches BitsCount bits from pSrc[..] at the position nBitsPos
void MakePalCol();
// Create the bitmap from the temporary bitmap aMap
// and partly deletes aMap while doing this.
bool ConvertScanline(sal_Int32 nY);
// converts a Scanline to the Windows-BMP format
bool HasAlphaChannel() const;
void SetPixel(long nY, long nX, sal_uInt8 cIndex);
void SetPixel(long nY, long nX, Color c);
void SetPixelAlpha(long nY, long nX, sal_uInt8 nAlpha);
public:
TIFFReader()
: bStatus(false)
, pTIFF(nullptr)
, nDstBitsPerPixel(0)
, nLargestPixelIndex(-1)
, nOrigPos(0)
, nEndOfFile(0)
, nDataType(0)
, bByteSwap(false)
, nNewSubFile(0)
, nSubFile(0)
, nImageWidth(0)
, nImageLength(0)
, nBitsPerSample(1)
, nCompression(1)
, nPhotometricInterpretation(0)
, nThresholding(1)
, nCellWidth(1)
, nCellLength(1)
, nFillOrder(1)
, nOrientation(1)
, nSamplesPerPixel(1)
, nRowsPerStrip(0xffffffff)
, nMinSampleValue(0)
, nMaxSampleValue(0)
, fXResolution(0.0)
, fYResolution(0.0)
, nPlanarConfiguration(1)
, nGroup3Options(0)
, nGroup4Options(0)
, nResolutionUnit(2)
, nPredictor(0)
, nNumColors(0)
, nPlanes(0)
, nStripsPerPlane(0)
, nBytesPerRow(0)
{
}
sal_uInt32 GetRowsPerStrip() const
{
//Rows Per Strip:
//
//(TIFF format only) The number of rows of pixels per strip to use for
//encoding the TIFF image. A value greater than zero specifies the
//number of rows per strip. A value of 0 sets the rows per strip equal
//to the image length, resulting in a single strip. A value of -1 (the
//default) sets the rows per strip equal to infinity, resulting in a
//single strip.
return nRowsPerStrip == 0 ? nImageLength : nRowsPerStrip;
}
bool ReadTIFF( SvStream & rTIFF, Graphic & rGraphic );
};
//=================== Methods of TIFFReader ==============================
sal_uInt32 TIFFReader::DataTypeSize()
{
sal_uInt32 nSize;
switch ( nDataType )
{
case 1 : // BYTE
case 2 : // ASCII
case 6 : // SIGNED Byte
case 7 : // UNDEFINED
nSize = 1;
break;
case 3 : // UINT16
case 8 : // INT16
nSize = 2;
break;
case 4 : // UINT32
case 9 : // INT32
case 11 : // FLOAT
nSize = 4;
break;
case 5 : // RATIONAL
case 10 : // SIGNED RATIONAL
case 12 : // DOUBLE
nSize = 8;
break;
default:
pTIFF->SetError(SVSTREAM_FILEFORMAT_ERROR);
nSize=1;
}
return nSize;
}
sal_uInt32 TIFFReader::ReadIntData()
{
double nDOUBLE(0.0);
float nFLOAT(0);
sal_uInt32 nUINT32a(0), nUINT32b(0);
sal_Int32 nINT32(0);
sal_uInt16 nUINT16(0);
sal_Int16 nINT16(0);
sal_uInt8 nBYTE(0);
char nCHAR(0);
switch( nDataType )
{
case 0 : //??
case 1 :
case 2 :
case 7 :
pTIFF->ReadUChar( nBYTE );
nUINT32a = nBYTE;
break;
case 3 :
pTIFF->ReadUInt16( nUINT16 );
nUINT32a = nUINT16;
break;
case 9 :
case 4 :
pTIFF->ReadUInt32( nUINT32a );
break;
case 5 :
pTIFF->ReadUInt32( nUINT32a ).ReadUInt32( nUINT32b );
if ( nUINT32b != 0 )
nUINT32a /= nUINT32b;
break;
case 6 :
pTIFF->ReadChar( nCHAR );
nUINT32a = static_cast<sal_Int32>(nCHAR);
break;
case 8 :
pTIFF->ReadInt16( nINT16 );
nUINT32a = static_cast<sal_Int32>(nINT16);
break;
case 10 :
pTIFF->ReadUInt32( nUINT32a ).ReadInt32( nINT32 );
if ( nINT32 != 0 )
nUINT32a /= nINT32;
break;
case 11 :
pTIFF->ReadFloat( nFLOAT );
if (!rtl::math::isNan(nFLOAT) && nFLOAT > SAL_MIN_INT32 - 1.0
&& nFLOAT < SAL_MAX_INT32 + 1.0)
{
nUINT32a = static_cast<sal_Int32>(nFLOAT);
}
else
{
SAL_INFO("filter.tiff", "float " << nFLOAT << " outsider of sal_Int32 range");
}
break;
case 12 :
pTIFF->ReadDouble( nDOUBLE );
if (!rtl::math::isNan(nDOUBLE) && nDOUBLE > SAL_MIN_INT32 - 1.0
&& nDOUBLE < SAL_MAX_INT32 + 1.0)
{
nUINT32a = static_cast<sal_Int32>(nDOUBLE);
}
else
{
SAL_INFO("filter.tiff", "double " << nDOUBLE << " outsider of sal_Int32 range");
}
break;
default:
pTIFF->ReadUInt32( nUINT32a );
break;
}
return nUINT32a;
}
double TIFFReader::ReadDoubleData()
{
switch (nDataType) {
case 5:
{
sal_uInt32 nulong(0);
pTIFF->ReadUInt32( nulong );
double nd = static_cast<double>(nulong);
nulong = 0;
pTIFF->ReadUInt32( nulong );
if ( nulong != 0 )
nd /= static_cast<double>(nulong);
return nd;
}
case 11:
{
float x = 0;
pTIFF->ReadFloat(x);
return x;
}
case 12:
{
double x = 0;
pTIFF->ReadDouble(x);
return x;
}
default:
return static_cast<double>(ReadIntData());
}
}
void TIFFReader::ReadTagData( sal_uInt16 nTagType, sal_uInt32 nDataLen)
{
if ( !bStatus )
return;
switch ( nTagType )
{
case 0x00fe: // New Sub File
nNewSubFile = ReadIntData();
SAL_INFO("filter.tiff","NewSubFile: " << nNewSubFile);
break;
case 0x00ff: // Sub File
nSubFile = ReadIntData();
SAL_INFO("filter.tiff","SubFile: " << nSubFile);
break;
case 0x0100: // Image Width
nImageWidth = ReadIntData();
SAL_INFO("filter.tiff","ImageWidth: " << nImageWidth);
break;
case 0x0101: // Image Length
nImageLength = ReadIntData();
SAL_INFO("filter.tiff","ImageLength: " << nImageLength);
break;
case 0x0102: // Bits Per Sample
nBitsPerSample = ReadIntData();
SAL_INFO("filter.tiff","BitsPerSample: " << nBitsPerSample);
if ( nBitsPerSample >= 32 ) // 32 bit and larger samples are not supported
bStatus = false;
break;
case 0x0103: // Compression
nCompression = ReadIntData();
SAL_INFO("filter.tiff","Compression: " << nCompression);
break;
case 0x0106: // Photometric Interpretation
nPhotometricInterpretation = ReadIntData();
SAL_INFO("filter.tiff","PhotometricInterpretation: " << nPhotometricInterpretation);
break;
case 0x0107: // Thresholding
nThresholding = ReadIntData();
SAL_INFO("filter.tiff","Thresholding: " << nThresholding);
break;
case 0x0108: // Cell Width
nCellWidth = ReadIntData();
break;
case 0x0109: // Cell Length
nCellLength = ReadIntData();
break;
case 0x010a: // Fill Order
nFillOrder = ReadIntData();
SAL_INFO("filter.tiff","FillOrder: " << nFillOrder);
break;
case 0x0111: { // Strip Offset(s)
size_t nOldNumSO = aStripOffsets.size();
nDataLen += nOldNumSO;
size_t const nMaxAllocAllowed = SAL_MAX_UINT32 / sizeof(sal_uInt32);
size_t nMaxRecordsAvailable = pTIFF->remainingSize() / DataTypeSize();
if (nDataLen > nOldNumSO && nDataLen < nMaxAllocAllowed &&
(nDataLen - nOldNumSO) <= nMaxRecordsAvailable)
{
try
{
aStripOffsets.resize(nDataLen);
for (size_t i = 0; i < nOldNumSO; ++i)
aStripOffsets[i] += nOrigPos;
for (size_t i = nOldNumSO; i < aStripOffsets.size(); ++i)
aStripOffsets[i] = ReadIntData() + nOrigPos;
}
catch (const std::bad_alloc &)
{
aStripOffsets.clear();
}
}
SAL_INFO("filter.tiff","StripOffsets (Number:) " << nDataLen);
break;
}
case 0x0112: // Orientation
nOrientation = ReadIntData();
SAL_INFO("filter.tiff","Orientation: " << nOrientation);
break;
case 0x0115: // Samples Per Pixel
nSamplesPerPixel = ReadIntData();
SAL_INFO("filter.tiff","SamplesPerPixel: " << nSamplesPerPixel);
break;
case 0x0116: // Rows Per Strip
nRowsPerStrip = ReadIntData();
SAL_INFO("filter.tiff","RowsPerStrip: " << nRowsPerStrip);
break;
case 0x0117: { // Strip Byte Counts
size_t nOldNumSBC = aStripByteCounts.size();
nDataLen += nOldNumSBC;
size_t const nMaxAllocAllowed = SAL_MAX_UINT32 / sizeof(sal_uInt32);
size_t nMaxRecordsAvailable = pTIFF->remainingSize() / DataTypeSize();
if (nDataLen > nOldNumSBC && nDataLen < nMaxAllocAllowed &&
(nDataLen - nOldNumSBC) <= nMaxRecordsAvailable)
{
try
{
aStripByteCounts.resize(nDataLen);
for (size_t i = nOldNumSBC; i < aStripByteCounts.size(); ++i)
aStripByteCounts[i] = ReadIntData();
}
catch (const std::bad_alloc &)
{
aStripByteCounts.clear();
}
}
SAL_INFO("filter.tiff","StripByteCounts (Number:) " << nDataLen);
break;
}
case 0x0118: // Min Sample Value
nMinSampleValue = ReadIntData();
SAL_INFO("filter.tiff","MinSampleValue: " << nMinSampleValue);
break;
case 0x0119: // Max Sample Value
nMaxSampleValue = ReadIntData();
SAL_INFO("filter.tiff","MaxSampleValue: " << nMaxSampleValue);
break;
case 0x011a: // X Resolution
fXResolution = ReadDoubleData();
break;
case 0x011b: // Y Resolution
fYResolution = ReadDoubleData();
break;
case 0x011c: // Planar Configuration
nPlanarConfiguration = ReadIntData();
SAL_INFO("filter.tiff","PlanarConfiguration: " << nPlanarConfiguration);
break;
case 0x0124: // Group 3 Options
nGroup3Options = ReadIntData();
SAL_INFO("filter.tiff","Group3Options: " << nGroup3Options);
break;
case 0x0125: // Group 4 Options
nGroup4Options = ReadIntData();
SAL_INFO("filter.tiff","Group4Options: " << nGroup4Options);
break;
case 0x0128: // Resolution Unit
nResolutionUnit = ReadIntData();
break;
case 0x013d: // Predictor
nPredictor = ReadIntData();
SAL_INFO("filter.tiff","Predictor: " << nPredictor);
break;
case 0x0140: { // Color Map
sal_uInt16 nVal;
nNumColors = (sal_uInt32(1) << nBitsPerSample);
if ( nDataType == 3 && nNumColors <= 256)
{
aColorMap.resize(256);
for (sal_uInt32 i = 0; i < nNumColors; ++i)
aColorMap[i] = 0;
for (sal_uInt32 i = 0; i < nNumColors; ++i)
{
pTIFF->ReadUInt16( nVal );
aColorMap[i] |= ( static_cast<sal_uInt32>(nVal) << 8 ) & 0x00ff0000;
}
for (sal_uInt32 i = 0; i < nNumColors; ++i)
{
pTIFF->ReadUInt16( nVal );
aColorMap[i] |= static_cast<sal_uInt32>(nVal) & 0x0000ff00;
}
for (sal_uInt32 i = 0; i < nNumColors; ++i)
{
pTIFF->ReadUInt16( nVal );
aColorMap[i] |= ( static_cast<sal_uInt32>(nVal) >> 8 ) & 0x000000ff;
}
}
else
bStatus = false;
SAL_INFO("filter.tiff","ColorMap (number of colors): " << nNumColors);
break;
}
case 0x0153: { // SampleFormat
sal_uInt32 nSampleFormat = ReadIntData();
if ( nSampleFormat == 3 ) // IEEE floating point samples are not supported yet
bStatus = false;
break;
}
}
if ( pTIFF->GetError() )
bStatus = false;
}
sal_uInt8* TIFFReader::getMapData(sal_uInt32 np)
{
aMap[np].resize(nBytesPerRow);
return aMap[np].data();
}
bool TIFFReader::ReadMap()
{
//when fuzzing with a max len set, max decompress to 250 times that limit
static size_t nMaxAllowedDecompression = [](const char* pEnv) { size_t nRet = pEnv ? std::atoi(pEnv) : 0; return nRet * 250; }(std::getenv("FUZZ_MAX_INPUT_LEN"));
size_t nTotalDataRead = 0;
if ( nCompression == 1 || nCompression == 32771 )
{
sal_uInt32 nStripBytesPerRow;
if ( nCompression == 1 )
nStripBytesPerRow = nBytesPerRow;
else
nStripBytesPerRow = ( nBytesPerRow + 1 ) & 0xfffffffe;
for (sal_Int32 ny = 0; ny < nImageLength; ++ny)
{
for (sal_uInt32 np = 0; np < nPlanes; ++np)
{
if (np >= SAL_N_ELEMENTS(aMap))
return false;
sal_uInt32 nStrip = ny / GetRowsPerStrip() + np * nStripsPerPlane;
if ( nStrip >= aStripOffsets.size())
return false;
pTIFF->Seek( aStripOffsets[ nStrip ] + ( ny % GetRowsPerStrip() ) * nStripBytesPerRow );
pTIFF->ReadBytes(getMapData(np), nBytesPerRow);
if (!pTIFF->good())
return false;
}
if ( !ConvertScanline( ny ) )
return false;
}
}
else if ( nCompression == 2 || nCompression == 3 || nCompression == 4 )
{
sal_uInt32 nOptions;
if ( nCompression == 2 )
{
nOptions = CCI_OPTION_BYTEALIGNROW;
}
else if ( nCompression == 3 )
{
nOptions = CCI_OPTION_EOL;
if ( nGroup3Options & 0x00000001 )
nOptions |= CCI_OPTION_2D;
if ( nGroup3Options & 0x00000004 )
nOptions |= CCI_OPTION_BYTEALIGNEOL;
if ( nGroup3Options & 0xfffffffa )
return false;
}
else
{ // nCompression==4
nOptions = CCI_OPTION_2D;
if ( nGroup4Options & 0xffffffff )
return false;
}
if ( nFillOrder == 2 )
{
nOptions |= CCI_OPTION_INVERSEBITORDER;
bByteSwap = false;
}
sal_uInt32 nStrip = 0;
if (nStrip >= aStripOffsets.size())
return false;
sal_uInt64 nOffset = aStripOffsets[nStrip];
if (nOffset > nEndOfFile)
return false;
pTIFF->Seek(aStripOffsets[nStrip]);
CCIDecompressor aCCIDecom( nOptions, nImageWidth );
aCCIDecom.StartDecompression( *pTIFF );
const bool bHasAlphaChannel = HasAlphaChannel();
for (sal_Int32 ny = 0; ny < nImageLength; ++ny)
{
bool bDifferentToPrev = ny == 0;
for (sal_uInt32 np = 0; np < nPlanes; ++np)
{
if ( ny / GetRowsPerStrip() + np * nStripsPerPlane > nStrip )
{
nStrip=ny/GetRowsPerStrip()+np*nStripsPerPlane;
if (nStrip >= aStripOffsets.size())
return false;
nOffset = aStripOffsets[nStrip];
if (nOffset > nEndOfFile)
return false;
pTIFF->Seek(nOffset);
aCCIDecom.StartDecompression( *pTIFF );
}
if (np >= SAL_N_ELEMENTS(aMap))
return false;
DecompressStatus aResult = aCCIDecom.DecompressScanline(getMapData(np), nImageWidth * nBitsPerSample * nSamplesPerPixel / nPlanes, np + 1 == nPlanes);
if (!aResult.m_bSuccess)
return false;
bDifferentToPrev |= !aResult.m_bBufferUnchanged;
if ( pTIFF->GetError() )
return false;
nTotalDataRead += nBytesPerRow;
if (nMaxAllowedDecompression && nTotalDataRead > nMaxAllowedDecompression)
return false;
}
if (!bDifferentToPrev)
{
//if the buffer for this line didn't change, then just copy the
//previous scanline instead of painfully decoding and setting
//each pixel one by one again
const int nColorSize = bHasAlphaChannel ? 4 : 3;
memcpy( maBitmap.data() + (ny * maBitmapPixelSize.Width()) * nColorSize,
maBitmap.data() + ((ny-1) * maBitmapPixelSize.Width()) * nColorSize,
maBitmapPixelSize.Width() * nColorSize);
}
else
{
if (!ConvertScanline(ny))
return false;
}
}
}
else if ( nCompression == 5 )
{
LZWDecompressor aLZWDecom;
sal_uInt32 nStrip(0);
if (nStrip >= aStripOffsets.size())
return false;
pTIFF->Seek(aStripOffsets[nStrip]);
aLZWDecom.StartDecompression(*pTIFF);
for (sal_Int32 ny = 0; ny < nImageLength; ++ny)
{
for (sal_uInt32 np = 0; np < nPlanes; ++np)
{
if ( ny / GetRowsPerStrip() + np * nStripsPerPlane > nStrip )
{
nStrip = ny / GetRowsPerStrip() + np * nStripsPerPlane;
if (nStrip >= aStripOffsets.size())
return false;
pTIFF->Seek(aStripOffsets[nStrip]);
aLZWDecom.StartDecompression(*pTIFF);
}
if (np >= SAL_N_ELEMENTS(aMap))
return false;
if ( ( aLZWDecom.Decompress(getMapData(np), nBytesPerRow) != nBytesPerRow ) || pTIFF->GetError() )
return false;
}
nTotalDataRead += nBytesPerRow;
if (nMaxAllowedDecompression && nTotalDataRead > nMaxAllowedDecompression)
return false;
if ( !ConvertScanline( ny ) )
return false;
}
}
else if ( nCompression == 32773 )
{
sal_uInt32 nStrip(0);
if (nStrip >= aStripOffsets.size())
return false;
pTIFF->Seek(aStripOffsets[nStrip]);
for (sal_Int32 ny = 0; ny < nImageLength; ++ny)
{
for (sal_uInt32 np = 0; np < nPlanes; ++np)
{
if ( ny / GetRowsPerStrip() + np * nStripsPerPlane > nStrip )
{
nStrip=ny/GetRowsPerStrip()+np*nStripsPerPlane;
if (nStrip >= aStripOffsets.size())
return false;
pTIFF->Seek(aStripOffsets[nStrip]);
}
sal_uInt32 nRowBytesLeft = nBytesPerRow;
if (np >= SAL_N_ELEMENTS(aMap))
return false;
sal_uInt8* pdst = getMapData(np);
do
{
sal_uInt8 nRecHeader(0);
pTIFF->ReadUChar(nRecHeader);
sal_uInt32 nRecCount;
if ((nRecHeader&0x80)==0)
{
nRecCount=0x00000001 + static_cast<sal_uInt32>(nRecHeader);
if ( nRecCount > nRowBytesLeft )
return false;
pTIFF->ReadBytes(pdst, nRecCount);
if (!pTIFF->good())
return false;
pdst+=nRecCount;
nRowBytesLeft-=nRecCount;
}
else if ( nRecHeader != 0x80 )
{
nRecCount = 0x000000101 - static_cast<sal_uInt32>(nRecHeader);
if ( nRecCount > nRowBytesLeft )
{
nRecCount = nRowBytesLeft;
}
sal_uInt8 nRecData(0);
pTIFF->ReadUChar( nRecData );
for (sal_uInt32 i = 0; i < nRecCount; ++i)
*(pdst++) = nRecData;
nRowBytesLeft -= nRecCount;
}
} while ( nRowBytesLeft != 0 );
if ( pTIFF->GetError() )
return false;
}
if ( !ConvertScanline( ny ) )
return false;
}
}
else
return false;
return true;
}
sal_uInt32 TIFFReader::GetBits( const sal_uInt8 * pSrc, sal_uInt32 nBitsPos, sal_uInt32 nBitsCount)
{
sal_uInt32 nRes;
if ( bByteSwap )
{
pSrc += ( nBitsPos >> 3 );
nBitsPos &= 7;
sal_uInt8 nDat = *pSrc;
nRes = static_cast<sal_uInt32>( BYTESWAP( nDat ) & ( 0xff >> nBitsPos ) );
if ( nBitsCount <= 8 - nBitsPos )
{
nRes >>= ( 8 - nBitsPos - nBitsCount );
}
else
{
pSrc++;
nBitsCount -= 8 - nBitsPos;
while ( nBitsCount >= 8 )
{
nDat = *(pSrc++);
nRes = ( nRes << 8 ) | static_cast<sal_uInt32>(BYTESWAP( nDat ));
nBitsCount -= 8;
}
if ( nBitsCount > 0 )
{
nDat = *pSrc;
nRes = ( nRes << nBitsCount ) | (static_cast<sal_uInt32>(BYTESWAP(nDat))>>(8-nBitsCount));
}
}
}
else
{
pSrc += ( nBitsPos >> 3 );
nBitsPos &= 7;
nRes = static_cast<sal_uInt32>((*pSrc)&(0xff>>nBitsPos));
if ( nBitsCount <= 8 - nBitsPos )
{
nRes >>= ( 8 - nBitsPos - nBitsCount );
}
else
{
pSrc++;
nBitsCount -= 8 - nBitsPos;
while ( nBitsCount >= 8 )
{
nRes = ( nRes << 8 ) | static_cast<sal_uInt32>(*(pSrc++));
nBitsCount -= 8;
}
if ( nBitsCount > 0 )
nRes = ( nRes << nBitsCount ) | (static_cast<sal_uInt32>(*pSrc)>>(8-nBitsCount));
}
}
return nRes;
}
void TIFFReader::SetPixel(long nY, long nX, sal_uInt8 cIndex)
{
maBitmap[(maBitmapPixelSize.Width() * nY + nX) * (HasAlphaChannel() ? 4 : 3)] = cIndex;
nLargestPixelIndex = std::max<int>(nLargestPixelIndex, cIndex);
}
void TIFFReader::SetPixel(long nY, long nX, Color c)
{
auto p = maBitmap.data() + ((maBitmapPixelSize.Width() * nY + nX) * (HasAlphaChannel() ? 4 : 3));
*p = c.GetRed();
p++;
*p = c.GetGreen();
p++;
*p = c.GetBlue();
if (HasAlphaChannel())
{
p++;
*p = 0xff; // alpha
}
}
void TIFFReader::SetPixelAlpha(long nY, long nX, sal_uInt8 nAlpha)
{
assert(HasAlphaChannel());
maBitmap[((maBitmapPixelSize.Width() * nY + nX) * 4) + 3] = nAlpha;
}
bool TIFFReader::ConvertScanline(sal_Int32 nY)
{
sal_uInt32 nRed, nGreen, nBlue, ns, nVal;
sal_uInt8 nByteVal;
if ( nDstBitsPerPixel == 24 )
{
if ( nBitsPerSample == 8 && nSamplesPerPixel >= 3 &&
nPlanes == 1 && nPhotometricInterpretation == 2 )
{
sal_uInt8* pt = getMapData(0);
// are the values being saved as difference?
if ( 2 == nPredictor )
{
sal_uInt8 nLRed = 0;
sal_uInt8 nLGreen = 0;
sal_uInt8 nLBlue = 0;
sal_uInt8 nLAlpha = 0;
for (sal_Int32 nx = 0; nx < nImageWidth; nx++, pt += nSamplesPerPixel)
{
// The following computations rely on sal_uInt8 wrap-around when adding the
// (unsigned) pt deltas; the "& 0xFF" is only conceptual, but helps prevent
// sanitizer warnings:
nLRed = (nLRed + pt[ 0 ]) & 0xFF;
nLGreen = (nLGreen + pt[ 1 ]) & 0xFF;
nLBlue = (nLBlue + pt[ 2 ]) & 0xFF;
SetPixel(nY, nx, Color(nLRed, nLGreen, nLBlue));
if (HasAlphaChannel())
{
nLAlpha = (nLAlpha + pt[ 3 ]) & 0xFF;
SetPixelAlpha(nY, nx, ~nLAlpha);
}
}
}
else
{
for (sal_Int32 nx = 0; nx < nImageWidth; nx++, pt += nSamplesPerPixel)
{
SetPixel(nY, nx, Color(pt[0], pt[1], pt[2]));
if (HasAlphaChannel())
{
sal_uInt8 nAlpha = pt[3];
SetPixelAlpha(nY, nx, ~nAlpha);
}
}
}
}
else if ( nPhotometricInterpretation == 2 && nSamplesPerPixel >= 3 )
{
if ( nMaxSampleValue > nMinSampleValue )
{
sal_uInt32 nMinMax = nMinSampleValue * 255 / ( nMaxSampleValue - nMinSampleValue );
for (sal_Int32 nx = 0; nx < nImageWidth; ++nx)
{
if ( nPlanes < 3 )
{
nRed = GetBits( getMapData(0), ( nx * nSamplesPerPixel + 0 ) * nBitsPerSample, nBitsPerSample );
nGreen = GetBits( getMapData(1), ( nx * nSamplesPerPixel + 1 ) * nBitsPerSample, nBitsPerSample );
nBlue = GetBits( getMapData(2), ( nx * nSamplesPerPixel + 2 ) * nBitsPerSample, nBitsPerSample );
}
else
{
nRed = GetBits( getMapData(0), nx * nBitsPerSample, nBitsPerSample );
nGreen = GetBits( getMapData(1), nx * nBitsPerSample, nBitsPerSample );
nBlue = GetBits( getMapData(2), nx * nBitsPerSample, nBitsPerSample );
}
SetPixel(nY, nx, Color(static_cast<sal_uInt8>(nRed - nMinMax), static_cast<sal_uInt8>(nGreen - nMinMax), static_cast<sal_uInt8>(nBlue - nMinMax)));
}
}
}
else if ( nPhotometricInterpretation == 5 && nSamplesPerPixel == 3 )
{
if ( nMaxSampleValue > nMinSampleValue )
{
sal_uInt32 nMinMax = nMinSampleValue * 255 / ( nMaxSampleValue - nMinSampleValue );
for (sal_Int32 nx = 0; nx < nImageWidth; ++nx)
{
if ( nPlanes < 3 )
{
nRed = GetBits( getMapData(0), ( nx * nSamplesPerPixel + 0 ) * nBitsPerSample, nBitsPerSample );
nGreen = GetBits( getMapData(0), ( nx * nSamplesPerPixel + 1 ) * nBitsPerSample, nBitsPerSample );
nBlue = GetBits( getMapData(0), ( nx * nSamplesPerPixel + 2 ) * nBitsPerSample, nBitsPerSample );
}
else
{
nRed = GetBits( getMapData(0), nx * nBitsPerSample, nBitsPerSample );
nGreen = GetBits( getMapData(1), nx * nBitsPerSample, nBitsPerSample );
nBlue = GetBits( getMapData(2), nx * nBitsPerSample, nBitsPerSample );
}
nRed = 255 - static_cast<sal_uInt8>( nRed - nMinMax );
nGreen = 255 - static_cast<sal_uInt8>( nGreen - nMinMax );
nBlue = 255 - static_cast<sal_uInt8>( nBlue - nMinMax );
SetPixel(nY, nx, Color(static_cast<sal_uInt8>(nRed), static_cast<sal_uInt8>(nGreen), static_cast<sal_uInt8>(nBlue)));
}
}
}
else if( nPhotometricInterpretation == 5 && nSamplesPerPixel == 4 )
{
if ( nMaxSampleValue > nMinSampleValue )
{
sal_uInt8 nSamp[ 4 ];
sal_uInt8 nSampLast[ 4 ] = { 0, 0, 0, 0 };
for(sal_Int32 nx = 0; nx < nImageWidth; ++nx)
{
// are the values being saved as difference?
if( 2 == nPredictor )
{
for( ns = 0; ns < 4; ns++ )
{
if( nPlanes < 3 )
nSampLast[ ns ] = nSampLast[ ns ] + static_cast<sal_uInt8>(GetBits( getMapData(0), ( nx * nSamplesPerPixel + ns ) * nBitsPerSample, nBitsPerSample ));
else
nSampLast[ ns ] = nSampLast[ ns ] + static_cast<sal_uInt8>(GetBits( getMapData(ns), nx * nBitsPerSample, nBitsPerSample ));
nSamp[ ns ] = nSampLast[ ns ];
}
}
else
{
for( ns = 0; ns < 4; ns++ )
{
if( nPlanes < 3 )
nSamp[ ns ] = static_cast<sal_uInt8>(GetBits( getMapData(0), ( nx * nSamplesPerPixel + ns ) * nBitsPerSample, nBitsPerSample ));
else
nSamp[ ns ]= static_cast<sal_uInt8>(GetBits( getMapData(ns), nx * nBitsPerSample, nBitsPerSample ));
}
}
const long nBlack = nSamp[ 3 ];
nRed = static_cast<sal_uInt8>(std::max( 0L, 255L - ( ( static_cast<sal_Int32>(nSamp[ 0 ]) + nBlack - static_cast<sal_Int32>(nMinSampleValue << 1U ) ) *
255L/static_cast<sal_Int32>(nMaxSampleValue-nMinSampleValue) ) ));
nGreen = static_cast<sal_uInt8>(std::max( 0L, 255L - ( ( static_cast<sal_Int32>(nSamp[ 1 ]) + nBlack - static_cast<sal_Int32>(nMinSampleValue << 1U ) ) *
255L/static_cast<sal_Int32>(nMaxSampleValue-nMinSampleValue) ) ));
nBlue = static_cast<sal_uInt8>(std::max( 0L, 255L - ( ( static_cast<sal_Int32>(nSamp[ 2 ]) + nBlack - static_cast<sal_Int32>(nMinSampleValue << 1U ) ) *
255L/static_cast<sal_Int32>(nMaxSampleValue-nMinSampleValue) ) ));
SetPixel(nY, nx, Color(static_cast<sal_uInt8>(nRed), static_cast<sal_uInt8>(nGreen), static_cast<sal_uInt8>(nBlue)));
}
}
}
}
else if ( nSamplesPerPixel == 1 && ( nPhotometricInterpretation <= 1 || nPhotometricInterpretation == 3 ) )
{
if ( nMaxSampleValue > nMinSampleValue )
{
sal_uInt32 nMinMax = ( ( 1 << nDstBitsPerPixel ) - 1 ) / ( nMaxSampleValue - nMinSampleValue );
sal_uInt8* pt = getMapData(0);
sal_uInt8* ptend = pt + nBytesPerRow;
sal_uInt8 nShift;
switch ( nDstBitsPerPixel )
{
case 8 :
{
if (pt + nImageWidth > ptend)
return false;
if ( bByteSwap )
{
if ( nPredictor == 2 )
{
sal_uInt8 nLast = 0;
for (sal_Int32 nx = 0; nx < nImageWidth; ++nx)
{
nLast += nx == 0 ? BYTESWAP( *pt++ ) : *pt++;
SetPixel(nY, nx, nLast);
}
}
else
{
for (sal_Int32 nx = 0; nx < nImageWidth; ++nx)
{
sal_uInt8 nLast = *pt++;
SetPixel(nY, nx, static_cast<sal_uInt8>( (BYTESWAP(static_cast<sal_uInt32>(nLast)) - nMinSampleValue) * nMinMax ));
}
}
}
else
{
if ( nPredictor == 2 )
{
sal_uInt8 nLast = 0;
for (sal_Int32 nx = 0; nx < nImageWidth; ++nx)
{
nLast += *pt++;
SetPixel(nY, nx, nLast);
}
}
else
{
for (sal_Int32 nx = 0; nx < nImageWidth; ++nx)
{
SetPixel(nY, nx, static_cast<sal_uInt8>( (static_cast<sal_uInt32>(*pt++) - nMinSampleValue) * nMinMax ));
}
}
}
}
break;
case 7 :
case 6 :
case 5 :
case 4 :
case 3 :
case 2 :
{
for (sal_Int32 nx = 0; nx < nImageWidth; ++nx)
{
nVal = ( GetBits( pt, nx * nBitsPerSample, nBitsPerSample ) - nMinSampleValue ) * nMinMax;
SetPixel(nY, nx, static_cast<sal_uInt8>(nVal));
}
}
break;
case 1 :
{
sal_uInt32 nByteCount = nImageWidth >> 3;
sal_uInt32 nBytesNeeded = nByteCount;
if (nImageWidth & 7)
++nBytesNeeded;
if (pt + nBytesNeeded > ptend)
return false;
if ( bByteSwap )
{
sal_Int32 nx = 0;
while (nByteCount--)
{
nByteVal = *pt++;
SetPixel(nY, nx++, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, nx++, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, nx++, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, nx++, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, nx++, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, nx++, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, nx++, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, nx++, nByteVal);
}
if ( nImageWidth & 7 )
{
nByteVal = *pt++;
while ( nx < nImageWidth )
{
SetPixel(nY, nx++, nByteVal & 1);
nByteVal >>= 1;
}
}
}
else
{
sal_Int32 nx = 7;
while (nByteCount--)
{
nByteVal = *pt++;
SetPixel(nY, nx, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, --nx, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, --nx, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, --nx, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, --nx, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, --nx, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, --nx, nByteVal & 1);
nByteVal >>= 1;
SetPixel(nY, --nx, nByteVal);
nx += 15;
}
if ( nImageWidth & 7 )
{
nx -= 7;
nByteVal = *pt++;
nShift = 7;
while ( nx < nImageWidth )
{
SetPixel(nY, nx++, ( nByteVal >> nShift ) & 1);
}
}
}
}
break;
default :
return false;
}
}
}
else if ( ( nSamplesPerPixel == 2 ) && ( nBitsPerSample == 8 ) &&
( nPlanarConfiguration == 1 ) && aColorMap.empty() ) // grayscale
{
if ( nMaxSampleValue > nMinSampleValue )
{
sal_uInt32 nMinMax = ( ( 1 << 8 /*nDstBitsPerPixel*/ ) - 1 ) / ( nMaxSampleValue - nMinSampleValue );
sal_uInt8* pt = getMapData(0);
for (sal_Int32 nx = 0; nx < nImageWidth; nx++, pt += 2 )
{
SetPixel(nY, nx, static_cast<sal_uInt8>( (static_cast<sal_uInt32>(*pt) - nMinSampleValue) * nMinMax));
}
}
}
else
return false;
return true;
}
void TIFFReader::MakePalCol()
{
if ( nDstBitsPerPixel <= 8 )
{
aColorMap.resize(256);
if ( nPhotometricInterpretation <= 1 )
{
nNumColors = sal_uInt32(1) << nBitsPerSample;
if ( nNumColors > 256 )
nNumColors = 256;
if (nLargestPixelIndex >= static_cast<int>(nNumColors))
{
SAL_WARN("filter.tiff", "palette has less entries that largest index used. Expanding palette to match");
nNumColors = nLargestPixelIndex + 1;
}
for (sal_uInt32 i = 0; i < nNumColors; ++i)
{
sal_uInt32 nVal = ( i * 255 / ( nNumColors - 1 ) ) & 0xff;
sal_uInt32 n0RGB = nVal | ( nVal << 8 ) | ( nVal << 16 );
if ( nPhotometricInterpretation == 1 )
aColorMap[i] = n0RGB;
else
aColorMap[nNumColors - i - 1] = n0RGB;
}
}
mvPalette.resize(std::max<sal_uInt16>(nNumColors, mvPalette.size()));
for (sal_uInt32 i = 0; i < nNumColors; ++i)
{
mvPalette[i] = Color( static_cast<sal_uInt8>( aColorMap[ i ] >> 16 ),
static_cast<sal_uInt8>( aColorMap[ i ] >> 8 ), static_cast<sal_uInt8>(aColorMap[ i ]) );
}
}
if ( fXResolution > 1.0 && fYResolution > 1.0 && ( nResolutionUnit == 2 || nResolutionUnit == 3 ) )
{
sal_uInt32 nRX, nRY;
if (nResolutionUnit==2)
{
nRX=static_cast<sal_uInt32>(fXResolution+0.5);
nRY=static_cast<sal_uInt32>(fYResolution+0.5);
}
else
{
nRX=static_cast<sal_uInt32>(fXResolution*2.54+0.5);
nRY=static_cast<sal_uInt32>(fYResolution*2.54+0.5);
}
MapMode aMapMode(MapUnit::MapInch,Point(0,0),Fraction(1,nRX),Fraction(1,nRY));
maBitmapPrefMapMode = aMapMode;
maBitmapPrefSize = Size(nImageWidth,nImageLength);
}
}
void TIFFReader::ReadHeader()
{
sal_uInt8 nbyte1(0), nbyte2(0);
sal_uInt16 nushort(0);
pTIFF->ReadUChar( nbyte1 );
if ( nbyte1 == 'I' )
pTIFF->SetEndian( SvStreamEndian::LITTLE );
else
pTIFF->SetEndian( SvStreamEndian::BIG );
pTIFF->ReadUChar( nbyte2 ).ReadUInt16( nushort );
if ( nbyte1 != nbyte2 || ( nbyte1 != 'I' && nbyte1 != 'M' ) || nushort != 0x002a )
bStatus = false;
}
bool TIFFReader::HasAlphaChannel() const
{
/*There are undoubtedly more variants we could support, but keep it simple for now*/
return (
nDstBitsPerPixel == 24 &&
nBitsPerSample == 8 &&
nSamplesPerPixel >= 4 &&
nPlanes == 1 &&
nPhotometricInterpretation == 2
);
}
namespace
{
Color SanitizePaletteIndex(sal_uInt8 nIndex, const std::vector<Color>& rPalette)
{
const size_t nPaletteEntryCount = rPalette.size();
if (nPaletteEntryCount && nIndex >= nPaletteEntryCount)
{
auto nSanitizedIndex = nIndex % nPaletteEntryCount;
SAL_WARN_IF(nIndex != nSanitizedIndex, "vcl", "invalid colormap index: "
<< static_cast<unsigned int>(nIndex) << ", colormap len is: "
<< nPaletteEntryCount);
nIndex = nSanitizedIndex;
}
return rPalette[nIndex];
}
}
bool TIFFReader::ReadTIFF(SvStream & rTIFF, Graphic & rGraphic )
{
sal_uInt16 i, nNumTags(0), nTagType(0);
sal_uInt32 nFirstIfd(0), nDataLen;
bStatus = true;
pTIFF = &rTIFF;
sal_uInt64 nMaxPos = nOrigPos = pTIFF->Tell();
nEndOfFile = nOrigPos + pTIFF->remainingSize();
// number format of pTIFF at the beginning
SvStreamEndian nOrigNumberFormat = pTIFF->GetEndian();
// read header:
ReadHeader();
// read first IFD:
pTIFF->ReadUInt32( nFirstIfd );
if( !nFirstIfd || pTIFF->GetError() )
bStatus = false;
if ( bStatus )
{
sal_uInt32 nOffset = nFirstIfd;
std::vector<sal_uInt32> aSeenOffsets;
// calculate length of TIFF file
do
{
if (std::find(aSeenOffsets.begin(), aSeenOffsets.end(), nOffset) != aSeenOffsets.end())
{
SAL_WARN("filter.tiff", "Parsing error: " << nOffset <<
" already processed, format loop");
bStatus = false;
break;
}
pTIFF->Seek(nOrigPos + nOffset);
aSeenOffsets.push_back(nOffset);
if( pTIFF->GetError() )
{
pTIFF->ResetError();
break;
};
nMaxPos = std::max( pTIFF->Tell(), nMaxPos );
pTIFF->ReadUInt16( nNumTags );
const size_t nMinRecordSize = 12;
const size_t nMaxRecords = pTIFF->remainingSize() / nMinRecordSize;
if (nNumTags > nMaxRecords)
{
SAL_WARN("filter.tiff", "Parsing error: " << nMaxRecords <<
" max possible entries, but " << nNumTags << " claimed, truncating");
nNumTags = nMaxRecords;
}
// loop through tags:
for( i = 0; i < nNumTags; i++ )
{
nTagType = 0;
nDataType = USHRT_MAX;
nDataLen = 0;
nOffset = 0;
pTIFF->ReadUInt16( nTagType ).ReadUInt16( nDataType ).ReadUInt32( nDataLen ).ReadUInt32( nOffset );
if( DataTypeSize() * nDataLen > 4 )
nMaxPos = std::max(nOrigPos + nOffset + DataTypeSize() * nDataLen, nMaxPos);
}
pTIFF->ReadUInt32( nOffset );
if (!pTIFF->good())
nOffset = 0;
nMaxPos = std::max( pTIFF->Tell(), nMaxPos );
if ( !nOffset )
nMaxPos = std::max( pTIFF->Tell(), nMaxPos );
}
while( nOffset );
std::vector<sal_uInt32> aSeenIfds;
for ( sal_uInt32 nNextIfd = nFirstIfd; nNextIfd && bStatus; )
{
if (std::find(aSeenIfds.begin(), aSeenIfds.end(), nNextIfd) != aSeenIfds.end())
{
SAL_WARN("filter.tiff", "Parsing error: " << nNextIfd <<
" already processed, format loop");
bStatus = false;
break;
}
pTIFF->Seek(nOrigPos + nNextIfd);
aSeenIfds.push_back(nNextIfd);
{
bByteSwap = false;
nNewSubFile = 0;
nSubFile = 0;
nImageWidth = 0;
nImageLength = 0;
nBitsPerSample = 1; // default value according to the documentation
nCompression = 1;
nPhotometricInterpretation = 0;
nThresholding = 1; // default value according to the documentation
nCellWidth = 1;
nCellLength = 1;
nFillOrder = 1; // default value according to the documentation
nOrientation = 1;
nSamplesPerPixel = 1; // default value according to the documentation
nRowsPerStrip = 0xffffffff; // default value according to the documentation
nMinSampleValue = 0; // default value according to the documentation
nMaxSampleValue = 0;
fXResolution = 0.0;
fYResolution = 0.0;
nPlanarConfiguration = 1;
nGroup3Options = 0; // default value according to the documentation
nGroup4Options = 0; // default value according to the documentation
nResolutionUnit = 2; // default value according to the documentation
nPredictor = 1;
nNumColors = 0;
aStripOffsets.clear();
aStripByteCounts.clear();
for (auto& j : aMap)
j.clear();
pTIFF->ReadUInt16( nNumTags );
sal_uInt64 nPos = pTIFF->Tell();
const size_t nMinRecordSize = 8;
const size_t nMaxRecords = pTIFF->remainingSize() / nMinRecordSize;
if (nNumTags > nMaxRecords)
{
SAL_WARN("filter.tiff", "Parsing error: " << nMaxRecords <<
" max possible entries, but " << nNumTags << " claimed, truncating");
nNumTags = nMaxRecords;
}
for( i = 0; i < nNumTags; i++ )
{
pTIFF->ReadUInt16( nTagType ).ReadUInt16( nDataType ).ReadUInt32( nDataLen );
if( DataTypeSize() * nDataLen > 4 )
{
pTIFF->ReadUInt32( nOffset );
if (!checkSeek(*pTIFF, nOrigPos + nOffset))
{
bStatus = false;
break;
}
}
ReadTagData( nTagType, nDataLen );
nPos += 12; pTIFF->Seek( nPos );
if ( pTIFF->GetError() )
bStatus = false;
if ( !bStatus )
break;
}
pTIFF->ReadUInt32( nNextIfd );
if (!pTIFF->good())
nNextIfd = 0;
}
if ( !nBitsPerSample || ( nBitsPerSample > 32 ) )
bStatus = false;
if (nImageWidth <= 0 || nImageLength <= 0)
bStatus = false;
if ( bStatus )
{
nLargestPixelIndex = -1;
if ( nMaxSampleValue == 0 )
{
if ( nBitsPerSample == 32 ) // sj: i93300, compiler bug, 1 << 32 gives 1 one 32bit windows platforms,
nMaxSampleValue = 0xffffffff; // (up from 80286 only the lower 5 bits are used when shifting a 32bit register)
else
{
nMaxSampleValue = (1U << nBitsPerSample) - 1;
}
}
if ( nPhotometricInterpretation == 2 || nPhotometricInterpretation == 5 || nPhotometricInterpretation == 6 )
nDstBitsPerPixel = 24;
else if ( nBitsPerSample*nSamplesPerPixel <= 1 )
nDstBitsPerPixel = 1;
else if ( nBitsPerSample*nSamplesPerPixel <= 4 )
nDstBitsPerPixel = 4;
else
nDstBitsPerPixel = 8;
if ( nPlanarConfiguration == 1 )
nPlanes = 1;
else
nPlanes = nSamplesPerPixel;
bStatus = nPlanes != 0;
}
sal_uInt32 nDiv = GetRowsPerStrip();
if ( bStatus )
{
bStatus = (nDiv != 0);
}
if ( bStatus )
{
if ( ( nFillOrder == 2 ) && ( nCompression != 5 ) ) // in the LZW mode bits are already being inverted
bByteSwap = true;
nStripsPerPlane = ( nImageLength - 1 ) / nDiv + 1;
bStatus = nSamplesPerPixel != 0;
}
if ( bStatus )
{
sal_uInt64 nRowSize = (static_cast<sal_uInt64>(nImageWidth) * nSamplesPerPixel / nPlanes * nBitsPerSample + 7) >> 3;
if (nRowSize > SAL_MAX_INT32 / SAL_N_ELEMENTS(aMap))
{
SAL_WARN("filter.tiff", "Ludicrous row size of: " << nRowSize << " required");
bStatus = false;
}
else
nBytesPerRow = nRowSize;
}
if (bStatus)
{
//sanity check consider ReadMap condition for last row and
//last plane
if (nCompression == 1 || nCompression == 32771)
{
sal_uInt32 nStripBytesPerRow;
if (nCompression == 1)
nStripBytesPerRow = nBytesPerRow;
else
nStripBytesPerRow = ( nBytesPerRow + 1 ) & 0xfffffffe;
sal_uInt32 np = nPlanes - 1;
if (np >= SAL_N_ELEMENTS(aMap))
bStatus = false;
sal_Int32 ny = nImageLength - 1;
sal_uInt32 nStrip(0);
nDiv = GetRowsPerStrip();
if (bStatus)
bStatus = nDiv != 0;
if (bStatus)
{
nStrip = ny / nDiv + np * nStripsPerPlane;
if (nStrip >= aStripOffsets.size())
bStatus = false;
}
if (bStatus)
{
auto nStart = aStripOffsets[ nStrip ] + ( ny % GetRowsPerStrip() ) * nStripBytesPerRow;
auto nEnd = nStart + nBytesPerRow;
if (nEnd > nEndOfFile)
bStatus = false;
}
}
else if (nCompression == 2 || nCompression == 3 || nCompression == 4)
{
if (nCompression == 3 && nGroup3Options & 0xfffffffa)
bStatus = false;
else if (nCompression == 4 && nGroup4Options & 0xffffffff)
bStatus = false;
sal_uInt32 np = nPlanes - 1;
if (np >= SAL_N_ELEMENTS(aMap))
bStatus = false;
sal_Int32 ny = nImageLength - 1;
sal_uInt32 nStrip(0);
nDiv = GetRowsPerStrip();
if (bStatus)
bStatus = nDiv != 0;
if (bStatus)
{
nStrip = ny / nDiv + np * nStripsPerPlane;
if (nStrip >= aStripOffsets.size())
bStatus = false;
}
if (bStatus)
{
auto nStart = aStripOffsets[nStrip];
if (nStart > nEndOfFile)
bStatus = false;
}
if (bStatus)
{
sal_uLong nTargetBits = nImageWidth * nBitsPerSample * nSamplesPerPixel / nPlanes;
if (nTargetBits > SAL_MAX_UINT16)
bStatus = false;
}
}
else if (nCompression == 5)
{
sal_uInt32 np = nPlanes - 1;
if (np >= SAL_N_ELEMENTS(aMap))
bStatus = false;
sal_Int32 ny = nImageLength - 1;
sal_uInt32 nStrip(0);
nDiv = GetRowsPerStrip();
if (bStatus)
bStatus = nDiv != 0;
if (bStatus)
{
nStrip = ny / nDiv + np * nStripsPerPlane;
if (nStrip >= aStripOffsets.size())
bStatus = false;
}
if (bStatus)
{
auto nStart = aStripOffsets[nStrip];
if (nStart > nEndOfFile)
bStatus = false;
}
}
else if (nCompression == 32773)
{
}
else
{
bStatus = false;
}
}
sal_Int32 nImageDataSize(0);
if (bStatus)
{
if (o3tl::checked_multiply<sal_Int32>(nImageWidth, nImageLength, nImageDataSize) ||
o3tl::checked_multiply<sal_Int32>(nImageDataSize, (HasAlphaChannel() ? 4 : 3), nImageDataSize) ||
nImageDataSize > SAL_MAX_INT32/4)
{
bStatus = false;
}
}
if (bStatus)
{
sal_Int32 nResult = 0;
if (utl::ConfigManager::IsFuzzing() && (o3tl::checked_multiply(nImageWidth, nImageLength, nResult) || nResult > 4000000))
bStatus = false;
}
if ( bStatus )
{
maBitmapPixelSize = Size(nImageWidth, nImageLength);
maBitmap.resize(nImageDataSize, 0);
if (bStatus && ReadMap())
{
nMaxPos = std::max( pTIFF->Tell(), nMaxPos );
MakePalCol();
nMaxPos = std::max( pTIFF->Tell(), nMaxPos );
// convert palette-ized images to 24-bit color
if (!mvPalette.empty())
{
for (sal_Int32 nY = 0; nY < nImageLength; ++nY)
{
for (sal_Int32 nX = 0; nX < nImageWidth; ++nX)
{
auto p = maBitmap.data() + ((maBitmapPixelSize.Width() * nY + nX) * 3);
auto c = SanitizePaletteIndex(*p, mvPalette);
*p = c.GetRed();
p++;
*p = c.GetGreen();
p++;
*p = c.GetBlue();
}
}
}
}
else
bStatus = false;
if ( bStatus )
{
BitmapEx aImage = vcl::bitmap::CreateFromData(maBitmap.data(), nImageWidth, nImageLength,
nImageWidth * (HasAlphaChannel() ? 4 : 3), // scanline bytes
HasAlphaChannel() ? 32 : 24);
aImage.SetPrefMapMode(maBitmapPrefMapMode);
aImage.SetPrefSize(maBitmapPrefSize);
AnimationBitmap aAnimationBitmap( aImage, Point( 0, 0 ), maBitmapPixelSize,
ANIMATION_TIMEOUT_ON_CLICK, Disposal::Back );
aAnimation.Insert( aAnimationBitmap );
}
}
// Clean up:
for (auto& j : aMap)
j.clear();
aColorMap.clear();
aStripOffsets.clear();
aStripByteCounts.clear();
}
}
// seek to end of TIFF if succeeded
pTIFF->SetEndian( nOrigNumberFormat );
pTIFF->Seek(bStatus ? nMaxPos : nOrigPos);
if ( aAnimation.Count() )
{
if ( aAnimation.Count() == 1 )
rGraphic = aAnimation.GetBitmapEx();
else
rGraphic = aAnimation; //aBitmap;
return true;
}
else
return false;
}
//================== GraphicImport - the exported function ================
extern "C" SAL_DLLPUBLIC_EXPORT bool
itiGraphicImport( SvStream & rStream, Graphic & rGraphic, FilterConfigItem* )
{
TIFFReader aTIFFReader;
try
{
return aTIFFReader.ReadTIFF(rStream, rGraphic);
}
catch (const std::bad_alloc &)
{
return false;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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