blob: 2f0a18d62e3981af1db4a18da627ae69da9ccbec [file] [log] [blame]
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "../../../include/fpdfapi/fpdf_page.h"
#include "../../../include/fpdfapi/fpdf_module.h"
#include "../../../include/fxcodec/fx_codec.h"
#include "pageint.h"
#include <limits.h>
extern const FX_LPCSTR _PDF_OpCharType =
"IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII"
"IIVIIIIVIIVIIIIIVVIIIIIIIIIIIIII"
"IIVVVVVVIVVVVVVIVVVVVIIVVIIIIIII"
"IIVVVVVVVVVVVVVVIVVVIIVVIVVIIIII"
"IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII"
"IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII"
"IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII"
"IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII";
FX_BOOL _PDF_HasInvalidOpChar(FX_LPCSTR op)
{
if(!op) {
return FALSE;
}
FX_BYTE ch;
while((ch = *op++)) {
if(_PDF_OpCharType[ch] == 'I') {
return TRUE;
}
}
return FALSE;
}
FX_DWORD CPDF_StreamContentParser::Parse(FX_LPCBYTE pData, FX_DWORD dwSize, FX_DWORD max_cost)
{
if (m_Level > _FPDF_MAX_FORM_LEVEL_) {
return dwSize;
}
FX_DWORD InitObjCount = m_pObjectList->CountObjects();
CPDF_StreamParser syntax(pData, dwSize);
m_pSyntax = &syntax;
m_CompatCount = 0;
while (1) {
FX_DWORD cost = m_pObjectList->CountObjects() - InitObjCount;
if (max_cost && cost >= max_cost) {
break;
}
switch (syntax.ParseNextElement()) {
case CPDF_StreamParser::EndOfData:
return m_pSyntax->GetPos();
case CPDF_StreamParser::Keyword:
if(!OnOperator((char*)syntax.GetWordBuf()) && _PDF_HasInvalidOpChar((char*)syntax.GetWordBuf())) {
m_bAbort = TRUE;
}
if (m_bAbort) {
return m_pSyntax->GetPos();
}
ClearAllParams();
break;
case CPDF_StreamParser::Number:
AddNumberParam((char*)syntax.GetWordBuf(), syntax.GetWordSize());
break;
case CPDF_StreamParser::Name:
AddNameParam((FX_LPCSTR)syntax.GetWordBuf() + 1, syntax.GetWordSize() - 1);
break;
default:
AddObjectParam(syntax.GetObject());
}
}
return m_pSyntax->GetPos();
}
void _PDF_ReplaceAbbr(CPDF_Object* pObj);
void CPDF_StreamContentParser::Handle_BeginImage()
{
FX_FILESIZE savePos = m_pSyntax->GetPos();
CPDF_Dictionary* pDict = CPDF_Dictionary::Create();
while (1) {
CPDF_StreamParser::SyntaxType type = m_pSyntax->ParseNextElement();
if (type == CPDF_StreamParser::Keyword) {
CFX_ByteString bsKeyword(m_pSyntax->GetWordBuf(), m_pSyntax->GetWordSize());
if (bsKeyword != FX_BSTRC("ID")) {
m_pSyntax->SetPos(savePos);
pDict->Release();
return;
}
}
if (type != CPDF_StreamParser::Name) {
break;
}
CFX_ByteString key((FX_LPCSTR)m_pSyntax->GetWordBuf() + 1, m_pSyntax->GetWordSize() - 1);
CPDF_Object* pObj = m_pSyntax->ReadNextObject();
if (!key.IsEmpty()) {
pDict->SetAt(key, pObj, m_pDocument);
} else {
pObj->Release();
}
}
_PDF_ReplaceAbbr(pDict);
CPDF_Object* pCSObj = NULL;
if (pDict->KeyExist(FX_BSTRC("ColorSpace"))) {
pCSObj = pDict->GetElementValue(FX_BSTRC("ColorSpace"));
if (pCSObj->GetType() == PDFOBJ_NAME) {
CFX_ByteString name = pCSObj->GetString();
if (name != FX_BSTRC("DeviceRGB") && name != FX_BSTRC("DeviceGray") && name != FX_BSTRC("DeviceCMYK")) {
pCSObj = FindResourceObj(FX_BSTRC("ColorSpace"), name);
if (pCSObj && !pCSObj->GetObjNum()) {
pCSObj = pCSObj->Clone();
pDict->SetAt(FX_BSTRC("ColorSpace"), pCSObj, m_pDocument);
}
}
}
}
CPDF_Stream* pStream = m_pSyntax->ReadInlineStream(m_pDocument, pDict, pCSObj, m_Options.m_bDecodeInlineImage);
while (1) {
CPDF_StreamParser::SyntaxType type = m_pSyntax->ParseNextElement();
if (type == CPDF_StreamParser::EndOfData) {
break;
}
if (type != CPDF_StreamParser::Keyword) {
continue;
}
if (m_pSyntax->GetWordSize() == 2 && m_pSyntax->GetWordBuf()[0] == 'E' &&
m_pSyntax->GetWordBuf()[1] == 'I') {
break;
}
}
if (m_Options.m_bTextOnly) {
if (pStream) {
pStream->Release();
} else {
pDict->Release();
}
return;
}
pDict->SetAtName(FX_BSTRC("Subtype"), FX_BSTRC("Image"));
CPDF_ImageObject *pImgObj = AddImage(pStream, NULL, TRUE);
if (!pImgObj) {
if (pStream) {
pStream->Release();
} else {
pDict->Release();
}
}
}
void CPDF_StreamContentParser::ParsePathObject()
{
FX_FLOAT params[6] = {0};
int nParams = 0;
int last_pos = m_pSyntax->GetPos();
while (1) {
CPDF_StreamParser::SyntaxType type = m_pSyntax->ParseNextElement();
FX_BOOL bProcessed = TRUE;
switch (type) {
case CPDF_StreamParser::EndOfData:
return;
case CPDF_StreamParser::Keyword: {
int len = m_pSyntax->GetWordSize();
if (len == 1) {
switch (m_pSyntax->GetWordBuf()[0]) {
case 'm':
AddPathPoint(params[0], params[1], FXPT_MOVETO);
nParams = 0;
break;
case 'l':
AddPathPoint(params[0], params[1], FXPT_LINETO);
nParams = 0;
break;
case 'c':
AddPathPoint(params[0], params[1], FXPT_BEZIERTO);
AddPathPoint(params[2], params[3], FXPT_BEZIERTO);
AddPathPoint(params[4], params[5], FXPT_BEZIERTO);
nParams = 0;
break;
case 'v':
AddPathPoint(m_PathCurrentX, m_PathCurrentY, FXPT_BEZIERTO);
AddPathPoint(params[0], params[1], FXPT_BEZIERTO);
AddPathPoint(params[2], params[3], FXPT_BEZIERTO);
nParams = 0;
break;
case 'y':
AddPathPoint(params[0], params[1], FXPT_BEZIERTO);
AddPathPoint(params[2], params[3], FXPT_BEZIERTO);
AddPathPoint(params[2], params[3], FXPT_BEZIERTO);
nParams = 0;
break;
case 'h':
Handle_ClosePath();
nParams = 0;
break;
default:
bProcessed = FALSE;
break;
}
} else if (len == 2) {
if (m_pSyntax->GetWordBuf()[0] == 'r' && m_pSyntax->GetWordBuf()[1] == 'e') {
AddPathRect(params[0], params[1], params[2], params[3]);
nParams = 0;
} else {
bProcessed = FALSE;
}
} else {
bProcessed = FALSE;
}
if (bProcessed) {
last_pos = m_pSyntax->GetPos();
}
break;
}
case CPDF_StreamParser::Number: {
if (nParams == 6) {
break;
}
FX_BOOL bInteger;
int value;
FX_atonum(CFX_ByteStringC(m_pSyntax->GetWordBuf(), m_pSyntax->GetWordSize()), bInteger, &value);
params[nParams++] = bInteger ? (FX_FLOAT)value : *(FX_FLOAT*)&value;
break;
}
default:
bProcessed = FALSE;
}
if (!bProcessed) {
m_pSyntax->SetPos(last_pos);
return;
}
}
}
CPDF_StreamParser::CPDF_StreamParser(const FX_BYTE* pData, FX_DWORD dwSize)
{
m_pBuf = pData;
m_Size = dwSize;
m_Pos = 0;
m_pLastObj = NULL;
}
CPDF_StreamParser::~CPDF_StreamParser()
{
if (m_pLastObj) {
m_pLastObj->Release();
}
}
FX_DWORD _DecodeAllScanlines(ICodec_ScanlineDecoder* pDecoder, FX_LPBYTE& dest_buf, FX_DWORD& dest_size)
{
if (pDecoder == NULL) {
return (FX_DWORD) - 1;
}
int ncomps = pDecoder->CountComps();
int bpc = pDecoder->GetBPC();
int width = pDecoder->GetWidth();
int height = pDecoder->GetHeight();
int pitch = (width * ncomps * bpc + 7) / 8;
if (height == 0 || pitch > (1 << 30) / height) {
delete pDecoder;
return -1;
}
dest_size = pitch * height;
dest_buf = FX_Alloc( FX_BYTE, dest_size);
for (int row = 0; row < height; row ++) {
FX_LPBYTE pLine = pDecoder->GetScanline(row);
if (pLine == NULL) {
break;
}
FXSYS_memcpy32(dest_buf + row * pitch, pLine, pitch);
}
FX_DWORD srcoff = pDecoder->GetSrcOffset();
delete pDecoder;
return srcoff;
}
ICodec_ScanlineDecoder* FPDFAPI_CreateFaxDecoder(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height,
const CPDF_Dictionary* pParams);
FX_DWORD _A85Decode(const FX_BYTE* src_buf, FX_DWORD src_size, FX_LPBYTE& dest_buf, FX_DWORD& dest_size);
FX_DWORD _HexDecode(const FX_BYTE* src_buf, FX_DWORD src_size, FX_LPBYTE& dest_buf, FX_DWORD& dest_size);
FX_DWORD FPDFAPI_FlateOrLZWDecode(FX_BOOL bLZW, const FX_BYTE* src_buf, FX_DWORD src_size, CPDF_Dictionary* pParams,
FX_DWORD estimated_size, FX_LPBYTE& dest_buf, FX_DWORD& dest_size);
FX_DWORD PDF_DecodeInlineStream(const FX_BYTE* src_buf, FX_DWORD limit,
int width, int height, CFX_ByteString& decoder,
CPDF_Dictionary* pParam, FX_LPBYTE& dest_buf, FX_DWORD& dest_size)
{
if (decoder == FX_BSTRC("CCITTFaxDecode") || decoder == FX_BSTRC("CCF")) {
ICodec_ScanlineDecoder* pDecoder = FPDFAPI_CreateFaxDecoder(src_buf, limit, width, height, pParam);
return _DecodeAllScanlines(pDecoder, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("ASCII85Decode") || decoder == FX_BSTRC("A85")) {
return _A85Decode(src_buf, limit, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("ASCIIHexDecode") || decoder == FX_BSTRC("AHx")) {
return _HexDecode(src_buf, limit, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("FlateDecode") || decoder == FX_BSTRC("Fl")) {
return FPDFAPI_FlateOrLZWDecode(FALSE, src_buf, limit, pParam, dest_size, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("LZWDecode") || decoder == FX_BSTRC("LZW")) {
return FPDFAPI_FlateOrLZWDecode(TRUE, src_buf, limit, pParam, 0, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("DCTDecode") || decoder == FX_BSTRC("DCT")) {
ICodec_ScanlineDecoder* pDecoder = CPDF_ModuleMgr::Get()->GetJpegModule()->CreateDecoder(
src_buf, limit, width, height, 0, pParam ? pParam->GetInteger(FX_BSTRC("ColorTransform"), 1) : 1);
return _DecodeAllScanlines(pDecoder, dest_buf, dest_size);
} else if (decoder == FX_BSTRC("RunLengthDecode") || decoder == FX_BSTRC("RL")) {
return RunLengthDecode(src_buf, limit, dest_buf, dest_size);
}
dest_size = 0;
dest_buf = 0;
return (FX_DWORD) - 1;
}
extern const FX_LPCSTR _PDF_CharType;
CPDF_Stream* CPDF_StreamParser::ReadInlineStream(CPDF_Document* pDoc, CPDF_Dictionary* pDict, CPDF_Object* pCSObj, FX_BOOL bDecode)
{
if (m_Pos == m_Size) {
return NULL;
}
if (_PDF_CharType[m_pBuf[m_Pos]] == 'W') {
m_Pos ++;
}
CFX_ByteString Decoder;
CPDF_Dictionary* pParam = NULL;
CPDF_Object* pFilter = pDict->GetElementValue(FX_BSTRC("Filter"));
if (pFilter == NULL) {
} else if (pFilter->GetType() == PDFOBJ_ARRAY) {
Decoder = ((CPDF_Array*)pFilter)->GetString(0);
CPDF_Array* pParams = pDict->GetArray(FX_BSTRC("DecodeParms"));
if (pParams) {
pParam = pParams->GetDict(0);
}
} else {
Decoder = pFilter->GetString();
pParam = pDict->GetDict(FX_BSTRC("DecodeParms"));
}
FX_DWORD width = pDict->GetInteger(FX_BSTRC("Width"));
FX_DWORD height = pDict->GetInteger(FX_BSTRC("Height"));
FX_DWORD OrigSize = 0;
if (pCSObj != NULL) {
FX_DWORD bpc = pDict->GetInteger(FX_BSTRC("BitsPerComponent"));
FX_DWORD nComponents = 1;
CPDF_ColorSpace* pCS = pDoc->LoadColorSpace(pCSObj);
if (pCS == NULL) {
nComponents = 3;
} else {
nComponents = pCS->CountComponents();
pDoc->GetPageData()->ReleaseColorSpace(pCSObj);
}
FX_DWORD pitch = width;
if (bpc && pitch > INT_MAX / bpc) {
return NULL;
}
pitch *= bpc;
if (nComponents && pitch > INT_MAX / nComponents) {
return NULL;
}
pitch *= nComponents;
if (pitch > INT_MAX - 7) {
return NULL;
}
pitch += 7;
pitch /= 8;
OrigSize = pitch;
} else {
if (width > INT_MAX - 7) {
return NULL;
}
OrigSize = ((width + 7) / 8);
}
if (height && OrigSize > INT_MAX / height) {
return NULL;
}
OrigSize *= height;
FX_LPBYTE pData = NULL;
FX_DWORD dwStreamSize;
if (Decoder.IsEmpty()) {
if (OrigSize > m_Size - m_Pos) {
OrigSize = m_Size - m_Pos;
}
pData = FX_Alloc(FX_BYTE, OrigSize);
FXSYS_memcpy32(pData, m_pBuf + m_Pos, OrigSize);
dwStreamSize = OrigSize;
m_Pos += OrigSize;
} else {
FX_DWORD dwDestSize = OrigSize;
dwStreamSize = PDF_DecodeInlineStream(m_pBuf + m_Pos, m_Size - m_Pos, width, height, Decoder, pParam,
pData, dwDestSize);
if ((int)dwStreamSize < 0) {
return NULL;
}
if (bDecode) {
m_Pos += dwStreamSize;
dwStreamSize = dwDestSize;
if (pFilter->GetType() == PDFOBJ_ARRAY) {
((CPDF_Array*)pFilter)->RemoveAt(0);
CPDF_Array* pParams = pDict->GetArray(FX_BSTRC("DecodeParms"));
if (pParams) {
pParams->RemoveAt(0);
}
} else {
pDict->RemoveAt(FX_BSTRC("Filter"));
pDict->RemoveAt(FX_BSTRC("DecodeParms"));
}
} else {
if (pData) {
FX_Free(pData);
}
FX_DWORD dwSavePos = m_Pos;
m_Pos += dwStreamSize;
while (1) {
FX_DWORD dwPrevPos = m_Pos;
CPDF_StreamParser::SyntaxType type = ParseNextElement();
if (type == CPDF_StreamParser::EndOfData) {
break;
}
if (type != CPDF_StreamParser::Keyword) {
dwStreamSize += m_Pos - dwPrevPos;
continue;
}
if (GetWordSize() == 2 && GetWordBuf()[0] == 'E' &&
GetWordBuf()[1] == 'I') {
m_Pos = dwPrevPos;
break;
}
dwStreamSize += m_Pos - dwPrevPos;
}
m_Pos = dwSavePos;
pData = FX_Alloc(FX_BYTE, dwStreamSize);
FXSYS_memcpy32(pData, m_pBuf + m_Pos, dwStreamSize);
m_Pos += dwStreamSize;
}
}
pDict->SetAtInteger(FX_BSTRC("Length"), (int)dwStreamSize);
return CPDF_Stream::Create(pData, dwStreamSize, pDict);
}
#define MAX_WORD_BUFFER 256
#define MAX_STRING_LENGTH 32767
#define FXDWORD_TRUE FXDWORD_FROM_LSBFIRST(0x65757274)
#define FXDWORD_NULL FXDWORD_FROM_LSBFIRST(0x6c6c756e)
#define FXDWORD_FALS FXDWORD_FROM_LSBFIRST(0x736c6166)
CPDF_StreamParser::SyntaxType CPDF_StreamParser::ParseNextElement()
{
if (m_pLastObj) {
m_pLastObj->Release();
m_pLastObj = NULL;
}
m_WordSize = 0;
FX_BOOL bIsNumber = TRUE;
if (m_Pos >= m_Size) {
return EndOfData;
}
int ch = m_pBuf[m_Pos++];
int type = _PDF_CharType[ch];
while (1) {
while (type == 'W') {
if (m_Size <= m_Pos) {
return EndOfData;
}
ch = m_pBuf[m_Pos++];
type = _PDF_CharType[ch];
}
if (ch != '%') {
break;
}
while (1) {
if (m_Size <= m_Pos) {
return EndOfData;
}
ch = m_pBuf[m_Pos++];
if (ch == '\r' || ch == '\n') {
break;
}
}
type = _PDF_CharType[ch];
}
if (type == 'D' && ch != '/') {
m_Pos --;
m_pLastObj = ReadNextObject();
return Others;
}
while (1) {
if (m_WordSize < MAX_WORD_BUFFER) {
m_WordBuffer[m_WordSize++] = ch;
}
if (type != 'N') {
bIsNumber = FALSE;
}
if (m_Size <= m_Pos) {
break;
}
ch = m_pBuf[m_Pos++];
type = _PDF_CharType[ch];
if (type == 'D' || type == 'W') {
m_Pos --;
break;
}
}
m_WordBuffer[m_WordSize] = 0;
if (bIsNumber) {
return Number;
}
if (m_WordBuffer[0] == '/') {
return Name;
}
if (m_WordSize == 4) {
if (*(FX_DWORD*)m_WordBuffer == FXDWORD_TRUE) {
m_pLastObj = CPDF_Boolean::Create(TRUE);
return Others;
}
if (*(FX_DWORD*)m_WordBuffer == FXDWORD_NULL) {
m_pLastObj = CPDF_Null::Create();
return Others;
}
} else if (m_WordSize == 5) {
if (*(FX_DWORD*)m_WordBuffer == FXDWORD_FALS && m_WordBuffer[4] == 'e') {
m_pLastObj = CPDF_Boolean::Create(FALSE);
return Others;
}
}
return Keyword;
}
void CPDF_StreamParser::SkipPathObject()
{
FX_DWORD command_startpos = m_Pos;
if (m_Pos >= m_Size) {
return;
}
int ch = m_pBuf[m_Pos++];
int type = _PDF_CharType[ch];
while (1) {
while (type == 'W') {
if (m_Pos >= m_Size) {
return;
}
ch = m_pBuf[m_Pos++];
type = _PDF_CharType[ch];
}
if (type != 'N') {
m_Pos = command_startpos;
return;
}
while (1) {
while (type != 'W') {
if (m_Pos >= m_Size) {
return;
}
ch = m_pBuf[m_Pos++];
type = _PDF_CharType[ch];
}
while (type == 'W') {
if (m_Pos >= m_Size) {
return;
}
ch = m_pBuf[m_Pos++];
type = _PDF_CharType[ch];
}
if (type == 'N') {
continue;
}
FX_DWORD op_startpos = m_Pos - 1;
while (type != 'W' && type != 'D') {
if (m_Pos >= m_Size) {
return;
}
ch = m_pBuf[m_Pos++];
type = _PDF_CharType[ch];
}
if (m_Pos - op_startpos == 2) {
int op = m_pBuf[op_startpos];
if (op == 'm' || op == 'l' || op == 'c' || op == 'v' || op == 'y') {
command_startpos = m_Pos;
break;
}
} else if (m_Pos - op_startpos == 3) {
if (m_pBuf[op_startpos] == 'r' && m_pBuf[op_startpos + 1] == 'e') {
command_startpos = m_Pos;
break;
}
}
m_Pos = command_startpos;
return;
}
}
}
CPDF_Object* CPDF_StreamParser::ReadNextObject(FX_BOOL bAllowNestedArray, FX_BOOL bInArray)
{
FX_BOOL bIsNumber;
GetNextWord(bIsNumber);
if (m_WordSize == 0) {
return NULL;
}
if (bIsNumber) {
m_WordBuffer[m_WordSize] = 0;
return CPDF_Number::Create(CFX_ByteStringC(m_WordBuffer, m_WordSize));
}
int first_char = m_WordBuffer[0];
if (first_char == '/') {
return CPDF_Name::Create(PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1)));
}
if (first_char == '(') {
return CPDF_String::Create(ReadString());
}
if (first_char == '<') {
if (m_WordSize == 1) {
return CPDF_String::Create(ReadHexString(), TRUE);
}
CPDF_Dictionary* pDict = CPDF_Dictionary::Create();
while (1) {
GetNextWord(bIsNumber);
if (m_WordSize == 0) {
pDict->Release();
return NULL;
}
if (m_WordSize == 2 && m_WordBuffer[0] == '>') {
break;
}
if (m_WordBuffer[0] != '/') {
pDict->Release();
return NULL;
}
CFX_ByteString key = PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1));
CPDF_Object* pObj = ReadNextObject(TRUE);
if (pObj == NULL) {
if (pDict) {
pDict->Release();
}
return NULL;
}
if (!key.IsEmpty()) {
pDict->SetAt(key, pObj);
} else {
pObj->Release();
}
}
return pDict;
}
if (first_char == '[') {
if (!bAllowNestedArray && bInArray) {
return NULL;
}
CPDF_Array* pArray = CPDF_Array::Create();
while (1) {
CPDF_Object* pObj = ReadNextObject(bAllowNestedArray, TRUE);
if (pObj == NULL) {
if (m_WordSize == 0 || m_WordBuffer[0] == ']') {
return pArray;
}
if (m_WordBuffer[0] == '[') {
continue;
}
} else {
pArray->Add(pObj);
}
}
}
if (m_WordSize == 4) {
if (*(FX_DWORD*)m_WordBuffer == FXDWORD_TRUE) {
return CPDF_Boolean::Create(TRUE);
}
if (*(FX_DWORD*)m_WordBuffer == FXDWORD_NULL) {
return CPDF_Null::Create();
}
} else if (m_WordSize == 5) {
if (*(FX_DWORD*)m_WordBuffer == FXDWORD_FALS && m_WordBuffer[4] == 'e') {
return CPDF_Boolean::Create(FALSE);
}
}
return NULL;
}
void CPDF_StreamParser::GetNextWord(FX_BOOL& bIsNumber)
{
m_WordSize = 0;
bIsNumber = TRUE;
if (m_Size <= m_Pos) {
return;
}
int ch = m_pBuf[m_Pos++];
int type = _PDF_CharType[ch];
while (1) {
while (type == 'W') {
if (m_Size <= m_Pos) {
return;
}
ch = m_pBuf[m_Pos++];
type = _PDF_CharType[ch];
}
if (ch != '%') {
break;
}
while (1) {
if (m_Size <= m_Pos) {
return;
}
ch = m_pBuf[m_Pos++];
if (ch == '\r' || ch == '\n') {
break;
}
}
type = _PDF_CharType[ch];
}
if (type == 'D') {
bIsNumber = FALSE;
m_WordBuffer[m_WordSize++] = ch;
if (ch == '/') {
while (1) {
if (m_Size <= m_Pos) {
return;
}
ch = m_pBuf[m_Pos++];
type = _PDF_CharType[ch];
if (type != 'R' && type != 'N') {
m_Pos --;
return;
}
if (m_WordSize < MAX_WORD_BUFFER) {
m_WordBuffer[m_WordSize++] = ch;
}
}
} else if (ch == '<') {
if (m_Size <= m_Pos) {
return;
}
ch = m_pBuf[m_Pos++];
if (ch == '<') {
m_WordBuffer[m_WordSize++] = ch;
} else {
m_Pos --;
}
} else if (ch == '>') {
if (m_Size <= m_Pos) {
return;
}
ch = m_pBuf[m_Pos++];
if (ch == '>') {
m_WordBuffer[m_WordSize++] = ch;
} else {
m_Pos --;
}
}
return;
}
while (1) {
if (m_WordSize < MAX_WORD_BUFFER) {
m_WordBuffer[m_WordSize++] = ch;
}
if (type != 'N') {
bIsNumber = FALSE;
}
if (m_Size <= m_Pos) {
return;
}
ch = m_pBuf[m_Pos++];
type = _PDF_CharType[ch];
if (type == 'D' || type == 'W') {
m_Pos --;
break;
}
}
}
CFX_ByteString CPDF_StreamParser::ReadString()
{
if (m_Size <= m_Pos) {
return CFX_ByteString();
}
int ch = m_pBuf[m_Pos++];
CFX_ByteTextBuf buf;
int parlevel = 0;
int status = 0, iEscCode = 0;
while (1) {
switch (status) {
case 0:
if (ch == ')') {
if (parlevel == 0) {
if (buf.GetLength() > MAX_STRING_LENGTH) {
return CFX_ByteString(buf.GetBuffer(), MAX_STRING_LENGTH);
}
return buf.GetByteString();
}
parlevel --;
buf.AppendChar(')');
} else if (ch == '(') {
parlevel ++;
buf.AppendChar('(');
} else if (ch == '\\') {
status = 1;
} else {
buf.AppendChar((char)ch);
}
break;
case 1:
if (ch >= '0' && ch <= '7') {
iEscCode = ch - '0';
status = 2;
break;
}
if (ch == 'n') {
buf.AppendChar('\n');
} else if (ch == 'r') {
buf.AppendChar('\r');
} else if (ch == 't') {
buf.AppendChar('\t');
} else if (ch == 'b') {
buf.AppendChar('\b');
} else if (ch == 'f') {
buf.AppendChar('\f');
} else if (ch == '\r') {
status = 4;
break;
} else if (ch == '\n') {
} else {
buf.AppendChar(ch);
}
status = 0;
break;
case 2:
if (ch >= '0' && ch <= '7') {
iEscCode = iEscCode * 8 + ch - '0';
status = 3;
} else {
buf.AppendChar(iEscCode);
status = 0;
continue;
}
break;
case 3:
if (ch >= '0' && ch <= '7') {
iEscCode = iEscCode * 8 + ch - '0';
buf.AppendChar(iEscCode);
status = 0;
} else {
buf.AppendChar(iEscCode);
status = 0;
continue;
}
break;
case 4:
status = 0;
if (ch != '\n') {
continue;
}
break;
}
if (m_Size <= m_Pos) {
break;
}
ch = m_pBuf[m_Pos++];
}
if (m_Size > m_Pos) {
ch = m_pBuf[m_Pos++];
}
if (buf.GetLength() > MAX_STRING_LENGTH) {
return CFX_ByteString(buf.GetBuffer(), MAX_STRING_LENGTH);
}
return buf.GetByteString();
}
CFX_ByteString CPDF_StreamParser::ReadHexString()
{
if (m_Size <= m_Pos) {
return CFX_ByteString();
}
int ch = m_pBuf[m_Pos++];
CFX_ByteTextBuf buf;
FX_BOOL bFirst = TRUE;
int code = 0;
while (1) {
if (ch == '>') {
break;
}
if (ch >= '0' && ch <= '9') {
if (bFirst) {
code = (ch - '0') * 16;
} else {
code += ch - '0';
buf.AppendChar((char)code);
}
bFirst = !bFirst;
} else if (ch >= 'A' && ch <= 'F') {
if (bFirst) {
code = (ch - 'A' + 10) * 16;
} else {
code += ch - 'A' + 10;
buf.AppendChar((char)code);
}
bFirst = !bFirst;
} else if (ch >= 'a' && ch <= 'f') {
if (bFirst) {
code = (ch - 'a' + 10) * 16;
} else {
code += ch - 'a' + 10;
buf.AppendChar((char)code);
}
bFirst = !bFirst;
}
if (m_Size <= m_Pos) {
break;
}
ch = m_pBuf[m_Pos++];
}
if (!bFirst) {
buf.AppendChar((char)code);
}
if (buf.GetLength() > MAX_STRING_LENGTH) {
return CFX_ByteString(buf.GetBuffer(), MAX_STRING_LENGTH);
}
return buf.GetByteString();
}
#define PAGEPARSE_STAGE_GETCONTENT 1
#define PAGEPARSE_STAGE_PARSE 2
#define PAGEPARSE_STAGE_CHECKCLIP 3
CPDF_ContentParser::CPDF_ContentParser()
{
m_pParser = NULL;
m_pStreamArray = NULL;
m_pSingleStream = NULL;
m_pData = NULL;
m_Status = Ready;
m_pType3Char = NULL;
}
CPDF_ContentParser::~CPDF_ContentParser()
{
Clear();
}
void CPDF_ContentParser::Clear()
{
if (m_pParser) {
delete m_pParser;
}
if (m_pSingleStream) {
delete m_pSingleStream;
}
if (m_pStreamArray) {
for (FX_DWORD i = 0; i < m_nStreams; i ++)
if (m_pStreamArray[i]) {
delete m_pStreamArray[i];
}
FX_Free(m_pStreamArray);
}
if (m_pData && m_pSingleStream == NULL) {
FX_Free((void*)m_pData);
}
m_pParser = NULL;
m_pStreamArray = NULL;
m_pSingleStream = NULL;
m_pData = NULL;
m_Status = Ready;
}
void CPDF_ContentParser::Start(CPDF_Page* pPage, CPDF_ParseOptions* pOptions)
{
if (m_Status != Ready || pPage == NULL || pPage->m_pDocument == NULL || pPage->m_pFormDict == NULL) {
m_Status = Done;
return;
}
m_pObjects = pPage;
m_bForm = FALSE;
if (pOptions) {
m_Options = *pOptions;
}
m_Status = ToBeContinued;
m_InternalStage = PAGEPARSE_STAGE_GETCONTENT;
m_CurrentOffset = 0;
CPDF_Object* pContent = pPage->m_pFormDict->GetElementValue(FX_BSTRC("Contents"));
if (pContent == NULL) {
m_Status = Done;
return;
}
if (pContent->GetType() == PDFOBJ_STREAM) {
m_nStreams = 0;
m_pSingleStream = FX_NEW CPDF_StreamAcc;
m_pSingleStream->LoadAllData((CPDF_Stream*)pContent, FALSE);
} else if (pContent->GetType() == PDFOBJ_ARRAY) {
CPDF_Array* pArray = (CPDF_Array*)pContent;
m_nStreams = pArray->GetCount();
if (m_nStreams == 0) {
m_Status = Done;
return;
}
m_pStreamArray = FX_Alloc(CPDF_StreamAcc*, m_nStreams);
FXSYS_memset32(m_pStreamArray, 0, sizeof(CPDF_StreamAcc*) * m_nStreams);
} else {
m_Status = Done;
return;
}
}
void CPDF_ContentParser::Start(CPDF_Form* pForm, CPDF_AllStates* pGraphicStates,
CFX_AffineMatrix* pParentMatrix, CPDF_Type3Char* pType3Char, CPDF_ParseOptions* pOptions, int level)
{
m_pType3Char = pType3Char;
m_pObjects = pForm;
m_bForm = TRUE;
CFX_AffineMatrix form_matrix = pForm->m_pFormDict->GetMatrix(FX_BSTRC("Matrix"));
if (pGraphicStates) {
form_matrix.Concat(pGraphicStates->m_CTM);
}
CPDF_Array* pBBox = pForm->m_pFormDict->GetArray(FX_BSTRC("BBox"));
CFX_FloatRect form_bbox;
CPDF_Path ClipPath;
if (pBBox) {
form_bbox = pBBox->GetRect();
ClipPath.New();
ClipPath.AppendRect(form_bbox.left, form_bbox.bottom, form_bbox.right, form_bbox.top);
ClipPath.Transform(&form_matrix);
if (pParentMatrix) {
ClipPath.Transform(pParentMatrix);
}
form_bbox.Transform(&form_matrix);
if (pParentMatrix) {
form_bbox.Transform(pParentMatrix);
}
}
CPDF_Dictionary* pResources = pForm->m_pFormDict->GetDict(FX_BSTRC("Resources"));
m_pParser = FX_NEW CPDF_StreamContentParser;
m_pParser->Initialize();
m_pParser->PrepareParse(pForm->m_pDocument, pForm->m_pPageResources, pForm->m_pResources, pParentMatrix, pForm,
pResources, &form_bbox, pOptions, pGraphicStates, level);
m_pParser->m_pCurStates->m_CTM = form_matrix;
m_pParser->m_pCurStates->m_ParentMatrix = form_matrix;
if (ClipPath.NotNull()) {
m_pParser->m_pCurStates->m_ClipPath.AppendPath(ClipPath, FXFILL_WINDING, TRUE);
}
if (pForm->m_Transparency & PDFTRANS_GROUP) {
CPDF_GeneralStateData* pData = m_pParser->m_pCurStates->m_GeneralState.GetModify();
pData->m_BlendType = FXDIB_BLEND_NORMAL;
pData->m_StrokeAlpha = 1.0f;
pData->m_FillAlpha = 1.0f;
pData->m_pSoftMask = NULL;
}
m_nStreams = 0;
m_pSingleStream = FX_NEW CPDF_StreamAcc;
if (pForm->m_pDocument) {
m_pSingleStream->LoadAllData(pForm->m_pFormStream, FALSE);
} else {
m_pSingleStream->LoadAllData(pForm->m_pFormStream, FALSE);
}
m_pData = (FX_LPBYTE)m_pSingleStream->GetData();
m_Size = m_pSingleStream->GetSize();
m_Status = ToBeContinued;
m_InternalStage = PAGEPARSE_STAGE_PARSE;
m_CurrentOffset = 0;
}
void CPDF_ContentParser::Continue(IFX_Pause* pPause)
{
int steps = 0;
while (m_Status == ToBeContinued) {
if (m_InternalStage == PAGEPARSE_STAGE_GETCONTENT) {
if (m_CurrentOffset == m_nStreams) {
if (m_pStreamArray) {
m_Size = 0;
FX_DWORD i;
for (i = 0; i < m_nStreams; i ++) {
FX_DWORD size = m_pStreamArray[i]->GetSize();
if (m_Size + size + 1 <= m_Size) {
m_Status = Done;
return;
}
m_Size += size + 1;
}
m_pData = FX_Alloc(FX_BYTE, m_Size);
if (!m_pData) {
m_Status = Done;
return;
}
FX_DWORD pos = 0;
for (i = 0; i < m_nStreams; i ++) {
FXSYS_memcpy32(m_pData + pos, m_pStreamArray[i]->GetData(), m_pStreamArray[i]->GetSize());
pos += m_pStreamArray[i]->GetSize() + 1;
m_pData[pos - 1] = ' ';
delete m_pStreamArray[i];
}
FX_Free(m_pStreamArray);
m_pStreamArray = NULL;
} else {
m_pData = (FX_LPBYTE)m_pSingleStream->GetData();
m_Size = m_pSingleStream->GetSize();
}
m_InternalStage = PAGEPARSE_STAGE_PARSE;
m_CurrentOffset = 0;
} else {
CPDF_Array* pContent = m_pObjects->m_pFormDict->GetArray(FX_BSTRC("Contents"));
m_pStreamArray[m_CurrentOffset] = FX_NEW CPDF_StreamAcc;
CPDF_Stream* pStreamObj = (CPDF_Stream*)pContent->GetElementValue(m_CurrentOffset);
m_pStreamArray[m_CurrentOffset]->LoadAllData(pStreamObj, FALSE);
m_CurrentOffset ++;
}
}
if (m_InternalStage == PAGEPARSE_STAGE_PARSE) {
if (m_pParser == NULL) {
m_pParser = FX_NEW CPDF_StreamContentParser;
m_pParser->Initialize();
m_pParser->PrepareParse(m_pObjects->m_pDocument, m_pObjects->m_pPageResources, NULL, NULL, m_pObjects,
m_pObjects->m_pResources, &m_pObjects->m_BBox, &m_Options, NULL, 0);
m_pParser->m_pCurStates->m_ColorState.GetModify()->Default();
}
if (m_CurrentOffset >= m_Size) {
m_InternalStage = PAGEPARSE_STAGE_CHECKCLIP;
} else {
m_CurrentOffset += m_pParser->Parse(m_pData + m_CurrentOffset, m_Size - m_CurrentOffset, PARSE_STEP_LIMIT);
if (m_pParser->m_bAbort) {
m_InternalStage = PAGEPARSE_STAGE_CHECKCLIP;
continue;
}
}
}
if (m_InternalStage == PAGEPARSE_STAGE_CHECKCLIP) {
if (m_pType3Char) {
m_pType3Char->m_bColored = m_pParser->m_bColored;
m_pType3Char->m_Width = FXSYS_round(m_pParser->m_Type3Data[0] * 1000);
m_pType3Char->m_BBox.left = FXSYS_round(m_pParser->m_Type3Data[2] * 1000);
m_pType3Char->m_BBox.bottom = FXSYS_round(m_pParser->m_Type3Data[3] * 1000);
m_pType3Char->m_BBox.right = FXSYS_round(m_pParser->m_Type3Data[4] * 1000);
m_pType3Char->m_BBox.top = FXSYS_round(m_pParser->m_Type3Data[5] * 1000);
}
FX_POSITION pos = m_pObjects->m_ObjectList.GetHeadPosition();
while (pos) {
CPDF_PageObject* pObj = (CPDF_PageObject*)m_pObjects->m_ObjectList.GetNext(pos);
if (pObj->m_ClipPath.IsNull()) {
continue;
}
if (pObj->m_ClipPath.GetPathCount() != 1) {
continue;
}
if (pObj->m_ClipPath.GetTextCount()) {
continue;
}
CPDF_Path ClipPath = pObj->m_ClipPath.GetPath(0);
if (!ClipPath.IsRect() || pObj->m_Type == PDFPAGE_SHADING) {
continue;
}
CFX_FloatRect old_rect(ClipPath.GetPointX(0), ClipPath.GetPointY(0),
ClipPath.GetPointX(2), ClipPath.GetPointY(2));
CFX_FloatRect obj_rect(pObj->m_Left, pObj->m_Bottom, pObj->m_Right, pObj->m_Top);
if (old_rect.Contains(obj_rect)) {
pObj->m_ClipPath.SetNull();
}
}
m_Status = Done;
return;
}
steps ++;
if (pPause && pPause->NeedToPauseNow()) {
break;
}
}
}
int CPDF_ContentParser::EstimateProgress()
{
if (m_Status == Ready) {
return 0;
}
if (m_Status == Done) {
return 100;
}
if (m_InternalStage == PAGEPARSE_STAGE_GETCONTENT) {
return 10;
}
if (m_InternalStage == PAGEPARSE_STAGE_CHECKCLIP) {
return 90;
}
return 10 + 80 * m_CurrentOffset / m_Size;
}