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Unified Diff: core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp

Issue 2386423004: Move core/fpdfapi/fpdf_page to core/fpdfapi/page (Closed)
Patch Set: Rebase to master Created 4 years, 2 months ago
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Index: core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
diff --git a/core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp b/core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
deleted file mode 100644
index 3c3104b8ab5de43cb984f21c91641450de210467..0000000000000000000000000000000000000000
--- a/core/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
+++ /dev/null
@@ -1,839 +0,0 @@
-// 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 "core/fpdfapi/fpdf_page/pageint.h"
-
-#include <limits.h>
-
-#include "core/fpdfapi/cpdf_modulemgr.h"
-#include "core/fpdfapi/font/cpdf_type3char.h"
-#include "core/fpdfapi/fpdf_page/cpdf_allstates.h"
-#include "core/fpdfapi/fpdf_page/cpdf_form.h"
-#include "core/fpdfapi/fpdf_page/cpdf_page.h"
-#include "core/fpdfapi/fpdf_page/cpdf_pageobject.h"
-#include "core/fpdfapi/fpdf_page/cpdf_path.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_array.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_boolean.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_dictionary.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_document.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_name.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_null.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_number.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_stream.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_stream_acc.h"
-#include "core/fpdfapi/fpdf_parser/cpdf_string.h"
-#include "core/fpdfapi/fpdf_parser/fpdf_parser_decode.h"
-#include "core/fpdfapi/fpdf_parser/fpdf_parser_utility.h"
-#include "core/fxcodec/fx_codec.h"
-#include "core/fxcrt/fx_ext.h"
-#include "core/fxcrt/fx_safe_types.h"
-#include "core/fxge/cfx_fxgedevice.h"
-#include "core/fxge/cfx_renderdevice.h"
-
-namespace {
-
-const uint32_t kMaxNestedArrayLevel = 512;
-const uint32_t kMaxWordBuffer = 256;
-const FX_STRSIZE kMaxStringLength = 32767;
-
-} // namespace
-
-CPDF_StreamParser::CPDF_StreamParser(const uint8_t* pData, uint32_t dwSize)
- : m_pBuf(pData),
- m_Size(dwSize),
- m_Pos(0),
- m_pLastObj(nullptr),
- m_pPool(nullptr) {}
-
-CPDF_StreamParser::CPDF_StreamParser(
- const uint8_t* pData,
- uint32_t dwSize,
- const CFX_WeakPtr<CFX_ByteStringPool>& pPool)
- : m_pBuf(pData),
- m_Size(dwSize),
- m_Pos(0),
- m_pLastObj(nullptr),
- m_pPool(pPool) {}
-
-CPDF_StreamParser::~CPDF_StreamParser() {
- if (m_pLastObj) {
- m_pLastObj->Release();
- }
-}
-
-uint32_t DecodeAllScanlines(CCodec_ScanlineDecoder* pDecoder,
- uint8_t*& dest_buf,
- uint32_t& dest_size) {
- if (!pDecoder) {
- return FX_INVALID_OFFSET;
- }
- 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 FX_INVALID_OFFSET;
- }
- dest_buf = FX_Alloc2D(uint8_t, pitch, height);
- dest_size = pitch * height; // Safe since checked alloc returned.
- for (int row = 0; row < height; row++) {
- const uint8_t* pLine = pDecoder->GetScanline(row);
- if (!pLine)
- break;
-
- FXSYS_memcpy(dest_buf + row * pitch, pLine, pitch);
- }
- uint32_t srcoff = pDecoder->GetSrcOffset();
- delete pDecoder;
- return srcoff;
-}
-
-CCodec_ScanlineDecoder* FPDFAPI_CreateFaxDecoder(
- const uint8_t* src_buf,
- uint32_t src_size,
- int width,
- int height,
- const CPDF_Dictionary* pParams);
-
-uint32_t PDF_DecodeInlineStream(const uint8_t* src_buf,
- uint32_t limit,
- int width,
- int height,
- CFX_ByteString& decoder,
- CPDF_Dictionary* pParam,
- uint8_t*& dest_buf,
- uint32_t& dest_size) {
- if (decoder == "CCITTFaxDecode" || decoder == "CCF") {
- CCodec_ScanlineDecoder* pDecoder =
- FPDFAPI_CreateFaxDecoder(src_buf, limit, width, height, pParam);
- return DecodeAllScanlines(pDecoder, dest_buf, dest_size);
- }
- if (decoder == "ASCII85Decode" || decoder == "A85") {
- return A85Decode(src_buf, limit, dest_buf, dest_size);
- }
- if (decoder == "ASCIIHexDecode" || decoder == "AHx") {
- return HexDecode(src_buf, limit, dest_buf, dest_size);
- }
- if (decoder == "FlateDecode" || decoder == "Fl") {
- return FPDFAPI_FlateOrLZWDecode(FALSE, src_buf, limit, pParam, dest_size,
- dest_buf, dest_size);
- }
- if (decoder == "LZWDecode" || decoder == "LZW") {
- return FPDFAPI_FlateOrLZWDecode(TRUE, src_buf, limit, pParam, 0, dest_buf,
- dest_size);
- }
- if (decoder == "DCTDecode" || decoder == "DCT") {
- CCodec_ScanlineDecoder* pDecoder =
- CPDF_ModuleMgr::Get()->GetJpegModule()->CreateDecoder(
- src_buf, limit, width, height, 0,
- pParam ? pParam->GetIntegerFor("ColorTransform", 1) : 1);
- return DecodeAllScanlines(pDecoder, dest_buf, dest_size);
- }
- if (decoder == "RunLengthDecode" || decoder == "RL") {
- return RunLengthDecode(src_buf, limit, dest_buf, dest_size);
- }
- dest_size = 0;
- dest_buf = 0;
- return (uint32_t)-1;
-}
-
-CPDF_Stream* CPDF_StreamParser::ReadInlineStream(CPDF_Document* pDoc,
- CPDF_Dictionary* pDict,
- CPDF_Object* pCSObj) {
- if (m_Pos == m_Size)
- return nullptr;
-
- if (PDFCharIsWhitespace(m_pBuf[m_Pos]))
- m_Pos++;
-
- CFX_ByteString Decoder;
- CPDF_Dictionary* pParam = nullptr;
- CPDF_Object* pFilter = pDict->GetDirectObjectFor("Filter");
- if (pFilter) {
- if (CPDF_Array* pArray = pFilter->AsArray()) {
- Decoder = pArray->GetStringAt(0);
- CPDF_Array* pParams = pDict->GetArrayFor("DecodeParms");
- if (pParams)
- pParam = pParams->GetDictAt(0);
- } else {
- Decoder = pFilter->GetString();
- pParam = pDict->GetDictFor("DecodeParms");
- }
- }
- uint32_t width = pDict->GetIntegerFor("Width");
- uint32_t height = pDict->GetIntegerFor("Height");
- uint32_t OrigSize = 0;
- if (pCSObj) {
- uint32_t bpc = pDict->GetIntegerFor("BitsPerComponent");
- uint32_t nComponents = 1;
- CPDF_ColorSpace* pCS = pDoc->LoadColorSpace(pCSObj);
- if (pCS) {
- nComponents = pCS->CountComponents();
- pDoc->GetPageData()->ReleaseColorSpace(pCSObj);
- } else {
- nComponents = 3;
- }
- uint32_t pitch = width;
- if (bpc && pitch > INT_MAX / bpc)
- return nullptr;
-
- pitch *= bpc;
- if (nComponents && pitch > INT_MAX / nComponents)
- return nullptr;
-
- pitch *= nComponents;
- if (pitch > INT_MAX - 7)
- return nullptr;
-
- pitch += 7;
- pitch /= 8;
- OrigSize = pitch;
- } else {
- if (width > INT_MAX - 7)
- return nullptr;
-
- OrigSize = ((width + 7) / 8);
- }
- if (height && OrigSize > INT_MAX / height)
- return nullptr;
-
- OrigSize *= height;
- uint8_t* pData = nullptr;
- uint32_t dwStreamSize;
- if (Decoder.IsEmpty()) {
- if (OrigSize > m_Size - m_Pos) {
- OrigSize = m_Size - m_Pos;
- }
- pData = FX_Alloc(uint8_t, OrigSize);
- FXSYS_memcpy(pData, m_pBuf + m_Pos, OrigSize);
- dwStreamSize = OrigSize;
- m_Pos += OrigSize;
- } else {
- uint32_t dwDestSize = OrigSize;
- dwStreamSize =
- PDF_DecodeInlineStream(m_pBuf + m_Pos, m_Size - m_Pos, width, height,
- Decoder, pParam, pData, dwDestSize);
- FX_Free(pData);
- if ((int)dwStreamSize < 0)
- return nullptr;
-
- uint32_t dwSavePos = m_Pos;
- m_Pos += dwStreamSize;
- while (1) {
- uint32_t 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(uint8_t, dwStreamSize);
- FXSYS_memcpy(pData, m_pBuf + m_Pos, dwStreamSize);
- m_Pos += dwStreamSize;
- }
- pDict->SetIntegerFor("Length", (int)dwStreamSize);
- return new CPDF_Stream(pData, dwStreamSize, pDict);
-}
-
-CPDF_StreamParser::SyntaxType CPDF_StreamParser::ParseNextElement() {
- if (m_pLastObj) {
- m_pLastObj->Release();
- m_pLastObj = nullptr;
- }
-
- m_WordSize = 0;
- FX_BOOL bIsNumber = TRUE;
- if (!PositionIsInBounds())
- return EndOfData;
-
- int ch = m_pBuf[m_Pos++];
- while (1) {
- while (PDFCharIsWhitespace(ch)) {
- if (!PositionIsInBounds())
- return EndOfData;
-
- ch = m_pBuf[m_Pos++];
- }
-
- if (ch != '%')
- break;
-
- while (1) {
- if (!PositionIsInBounds())
- return EndOfData;
-
- ch = m_pBuf[m_Pos++];
- if (PDFCharIsLineEnding(ch))
- break;
- }
- }
-
- if (PDFCharIsDelimiter(ch) && ch != '/') {
- m_Pos--;
- m_pLastObj = ReadNextObject(false, 0);
- return Others;
- }
-
- while (1) {
- if (m_WordSize < kMaxWordBuffer)
- m_WordBuffer[m_WordSize++] = ch;
-
- if (!PDFCharIsNumeric(ch))
- bIsNumber = FALSE;
-
- if (!PositionIsInBounds())
- break;
-
- ch = m_pBuf[m_Pos++];
-
- if (PDFCharIsDelimiter(ch) || PDFCharIsWhitespace(ch)) {
- m_Pos--;
- break;
- }
- }
-
- m_WordBuffer[m_WordSize] = 0;
- if (bIsNumber)
- return Number;
-
- if (m_WordBuffer[0] == '/')
- return Name;
-
- if (m_WordSize == 4) {
- if (memcmp(m_WordBuffer, "true", 4) == 0) {
- m_pLastObj = new CPDF_Boolean(TRUE);
- return Others;
- }
- if (memcmp(m_WordBuffer, "null", 4) == 0) {
- m_pLastObj = new CPDF_Null;
- return Others;
- }
- } else if (m_WordSize == 5) {
- if (memcmp(m_WordBuffer, "false", 5) == 0) {
- m_pLastObj = new CPDF_Boolean(FALSE);
- return Others;
- }
- }
- return Keyword;
-}
-
-CPDF_Object* CPDF_StreamParser::ReadNextObject(bool bAllowNestedArray,
- uint32_t dwInArrayLevel) {
- FX_BOOL bIsNumber;
- GetNextWord(bIsNumber);
- if (!m_WordSize)
- return nullptr;
-
- if (bIsNumber) {
- m_WordBuffer[m_WordSize] = 0;
- return new CPDF_Number(CFX_ByteStringC(m_WordBuffer, m_WordSize));
- }
-
- int first_char = m_WordBuffer[0];
- if (first_char == '/') {
- CFX_ByteString name =
- PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1));
- return new CPDF_Name(m_pPool ? m_pPool->Intern(name) : name);
- }
-
- if (first_char == '(') {
- CFX_ByteString str = ReadString();
- return new CPDF_String(m_pPool ? m_pPool->Intern(str) : str, FALSE);
- }
-
- if (first_char == '<') {
- if (m_WordSize == 1)
- return new CPDF_String(ReadHexString(), TRUE);
-
- CPDF_Dictionary* pDict = new CPDF_Dictionary(m_pPool);
- while (1) {
- GetNextWord(bIsNumber);
- if (m_WordSize == 2 && m_WordBuffer[0] == '>')
- break;
-
- if (!m_WordSize || m_WordBuffer[0] != '/') {
- pDict->Release();
- return nullptr;
- }
-
- CFX_ByteString key =
- PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1));
- CPDF_Object* pObj = ReadNextObject(true, 0);
- if (!pObj) {
- pDict->Release();
- return nullptr;
- }
-
- if (key.IsEmpty())
- pObj->Release();
- else
- pDict->SetFor(key, pObj);
- }
- return pDict;
- }
-
- if (first_char == '[') {
- if ((!bAllowNestedArray && dwInArrayLevel) ||
- dwInArrayLevel > kMaxNestedArrayLevel) {
- return nullptr;
- }
-
- CPDF_Array* pArray = new CPDF_Array;
- while (1) {
- CPDF_Object* pObj = ReadNextObject(bAllowNestedArray, dwInArrayLevel + 1);
- if (pObj) {
- pArray->Add(pObj);
- continue;
- }
-
- if (!m_WordSize || m_WordBuffer[0] == ']')
- break;
- }
- return pArray;
- }
-
- if (m_WordSize == 5 && !memcmp(m_WordBuffer, "false", 5))
- return new CPDF_Boolean(FALSE);
-
- if (m_WordSize == 4) {
- if (memcmp(m_WordBuffer, "true", 4) == 0)
- return new CPDF_Boolean(TRUE);
-
- if (memcmp(m_WordBuffer, "null", 4) == 0)
- return new CPDF_Null;
- }
-
- return nullptr;
-}
-
-void CPDF_StreamParser::GetNextWord(FX_BOOL& bIsNumber) {
- m_WordSize = 0;
- bIsNumber = TRUE;
- if (!PositionIsInBounds())
- return;
-
- int ch = m_pBuf[m_Pos++];
- while (1) {
- while (PDFCharIsWhitespace(ch)) {
- if (!PositionIsInBounds()) {
- return;
- }
- ch = m_pBuf[m_Pos++];
- }
-
- if (ch != '%')
- break;
-
- while (1) {
- if (!PositionIsInBounds())
- return;
- ch = m_pBuf[m_Pos++];
- if (PDFCharIsLineEnding(ch))
- break;
- }
- }
-
- if (PDFCharIsDelimiter(ch)) {
- bIsNumber = FALSE;
- m_WordBuffer[m_WordSize++] = ch;
- if (ch == '/') {
- while (1) {
- if (!PositionIsInBounds())
- return;
- ch = m_pBuf[m_Pos++];
- if (!PDFCharIsOther(ch) && !PDFCharIsNumeric(ch)) {
- m_Pos--;
- return;
- }
-
- if (m_WordSize < kMaxWordBuffer)
- m_WordBuffer[m_WordSize++] = ch;
- }
- } else if (ch == '<') {
- if (!PositionIsInBounds())
- return;
- ch = m_pBuf[m_Pos++];
- if (ch == '<')
- m_WordBuffer[m_WordSize++] = ch;
- else
- m_Pos--;
- } else if (ch == '>') {
- if (!PositionIsInBounds())
- return;
- ch = m_pBuf[m_Pos++];
- if (ch == '>')
- m_WordBuffer[m_WordSize++] = ch;
- else
- m_Pos--;
- }
- return;
- }
-
- while (1) {
- if (m_WordSize < kMaxWordBuffer)
- m_WordBuffer[m_WordSize++] = ch;
- if (!PDFCharIsNumeric(ch))
- bIsNumber = FALSE;
-
- if (!PositionIsInBounds())
- return;
- ch = m_pBuf[m_Pos++];
- if (PDFCharIsDelimiter(ch) || PDFCharIsWhitespace(ch)) {
- m_Pos--;
- break;
- }
- }
-}
-
-CFX_ByteString CPDF_StreamParser::ReadString() {
- if (!PositionIsInBounds())
- return CFX_ByteString();
-
- uint8_t ch = m_pBuf[m_Pos++];
- CFX_ByteTextBuf buf;
- int parlevel = 0;
- int status = 0;
- int iEscCode = 0;
- while (1) {
- switch (status) {
- case 0:
- if (ch == ')') {
- if (parlevel == 0) {
- if (buf.GetLength() > kMaxStringLength) {
- return CFX_ByteString(buf.GetBuffer(), kMaxStringLength);
- }
- return buf.MakeString();
- }
- 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 = FXSYS_toDecimalDigit(static_cast<FX_WCHAR>(ch));
- 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 + FXSYS_toDecimalDigit(static_cast<FX_WCHAR>(ch));
- status = 3;
- } else {
- buf.AppendChar(iEscCode);
- status = 0;
- continue;
- }
- break;
- case 3:
- if (ch >= '0' && ch <= '7') {
- iEscCode =
- iEscCode * 8 + FXSYS_toDecimalDigit(static_cast<FX_WCHAR>(ch));
- buf.AppendChar(iEscCode);
- status = 0;
- } else {
- buf.AppendChar(iEscCode);
- status = 0;
- continue;
- }
- break;
- case 4:
- status = 0;
- if (ch != '\n') {
- continue;
- }
- break;
- }
- if (!PositionIsInBounds())
- break;
-
- ch = m_pBuf[m_Pos++];
- }
- if (PositionIsInBounds())
- ++m_Pos;
-
- if (buf.GetLength() > kMaxStringLength) {
- return CFX_ByteString(buf.GetBuffer(), kMaxStringLength);
- }
- return buf.MakeString();
-}
-
-CFX_ByteString CPDF_StreamParser::ReadHexString() {
- if (!PositionIsInBounds())
- return CFX_ByteString();
-
- CFX_ByteTextBuf buf;
- bool bFirst = true;
- int code = 0;
- while (PositionIsInBounds()) {
- int ch = m_pBuf[m_Pos++];
-
- if (ch == '>')
- break;
-
- if (!std::isxdigit(ch))
- continue;
-
- int val = FXSYS_toHexDigit(ch);
- if (bFirst) {
- code = val * 16;
- } else {
- code += val;
- buf.AppendByte((uint8_t)code);
- }
- bFirst = !bFirst;
- }
- if (!bFirst)
- buf.AppendChar((char)code);
-
- if (buf.GetLength() > kMaxStringLength)
- return CFX_ByteString(buf.GetBuffer(), kMaxStringLength);
-
- return buf.MakeString();
-}
-
-bool CPDF_StreamParser::PositionIsInBounds() const {
- return m_Pos < m_Size;
-}
-
-CPDF_ContentParser::CPDF_ContentParser()
- : m_Status(Ready),
- m_InternalStage(STAGE_GETCONTENT),
- m_pObjectHolder(nullptr),
- m_bForm(false),
- m_pType3Char(nullptr),
- m_pData(nullptr),
- m_Size(0),
- m_CurrentOffset(0) {}
-
-CPDF_ContentParser::~CPDF_ContentParser() {
- if (!m_pSingleStream)
- FX_Free(m_pData);
-}
-
-void CPDF_ContentParser::Start(CPDF_Page* pPage) {
- if (m_Status != Ready || !pPage || !pPage->m_pDocument ||
- !pPage->m_pFormDict) {
- m_Status = Done;
- return;
- }
- m_pObjectHolder = pPage;
- m_bForm = FALSE;
- m_Status = ToBeContinued;
- m_InternalStage = STAGE_GETCONTENT;
- m_CurrentOffset = 0;
-
- CPDF_Object* pContent = pPage->m_pFormDict->GetDirectObjectFor("Contents");
- if (!pContent) {
- m_Status = Done;
- return;
- }
- if (CPDF_Stream* pStream = pContent->AsStream()) {
- m_nStreams = 0;
- m_pSingleStream.reset(new CPDF_StreamAcc);
- m_pSingleStream->LoadAllData(pStream, FALSE);
- } else if (CPDF_Array* pArray = pContent->AsArray()) {
- m_nStreams = pArray->GetCount();
- if (m_nStreams)
- m_StreamArray.resize(m_nStreams);
- else
- m_Status = Done;
- } else {
- m_Status = Done;
- }
-}
-
-void CPDF_ContentParser::Start(CPDF_Form* pForm,
- CPDF_AllStates* pGraphicStates,
- const CFX_Matrix* pParentMatrix,
- CPDF_Type3Char* pType3Char,
- int level) {
- m_pType3Char = pType3Char;
- m_pObjectHolder = pForm;
- m_bForm = TRUE;
- CFX_Matrix form_matrix = pForm->m_pFormDict->GetMatrixFor("Matrix");
- if (pGraphicStates) {
- form_matrix.Concat(pGraphicStates->m_CTM);
- }
- CPDF_Array* pBBox = pForm->m_pFormDict->GetArrayFor("BBox");
- CFX_FloatRect form_bbox;
- CPDF_Path ClipPath;
- if (pBBox) {
- form_bbox = pBBox->GetRect();
- ClipPath.Emplace();
- 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->GetDictFor("Resources");
- m_pParser.reset(new CPDF_StreamContentParser(
- pForm->m_pDocument, pForm->m_pPageResources, pForm->m_pResources,
- pParentMatrix, pForm, pResources, &form_bbox, pGraphicStates, level));
- m_pParser->GetCurStates()->m_CTM = form_matrix;
- m_pParser->GetCurStates()->m_ParentMatrix = form_matrix;
- if (ClipPath) {
- m_pParser->GetCurStates()->m_ClipPath.AppendPath(ClipPath, FXFILL_WINDING,
- TRUE);
- }
- if (pForm->m_Transparency & PDFTRANS_GROUP) {
- CPDF_GeneralState* pState = &m_pParser->GetCurStates()->m_GeneralState;
- pState->SetBlendType(FXDIB_BLEND_NORMAL);
- pState->SetStrokeAlpha(1.0f);
- pState->SetFillAlpha(1.0f);
- pState->SetSoftMask(nullptr);
- }
- m_nStreams = 0;
- m_pSingleStream.reset(new CPDF_StreamAcc);
- m_pSingleStream->LoadAllData(pForm->m_pFormStream, FALSE);
- m_pData = (uint8_t*)m_pSingleStream->GetData();
- m_Size = m_pSingleStream->GetSize();
- m_Status = ToBeContinued;
- m_InternalStage = STAGE_PARSE;
- m_CurrentOffset = 0;
-}
-
-void CPDF_ContentParser::Continue(IFX_Pause* pPause) {
- int steps = 0;
- while (m_Status == ToBeContinued) {
- if (m_InternalStage == STAGE_GETCONTENT) {
- if (m_CurrentOffset == m_nStreams) {
- if (!m_StreamArray.empty()) {
- FX_SAFE_UINT32 safeSize = 0;
- for (const auto& stream : m_StreamArray) {
- safeSize += stream->GetSize();
- safeSize += 1;
- }
- if (!safeSize.IsValid()) {
- m_Status = Done;
- return;
- }
- m_Size = safeSize.ValueOrDie();
- m_pData = FX_Alloc(uint8_t, m_Size);
- uint32_t pos = 0;
- for (const auto& stream : m_StreamArray) {
- FXSYS_memcpy(m_pData + pos, stream->GetData(), stream->GetSize());
- pos += stream->GetSize();
- m_pData[pos++] = ' ';
- }
- m_StreamArray.clear();
- } else {
- m_pData = (uint8_t*)m_pSingleStream->GetData();
- m_Size = m_pSingleStream->GetSize();
- }
- m_InternalStage = STAGE_PARSE;
- m_CurrentOffset = 0;
- } else {
- CPDF_Array* pContent =
- m_pObjectHolder->m_pFormDict->GetArrayFor("Contents");
- m_StreamArray[m_CurrentOffset].reset(new CPDF_StreamAcc);
- CPDF_Stream* pStreamObj = ToStream(
- pContent ? pContent->GetDirectObjectAt(m_CurrentOffset) : nullptr);
- m_StreamArray[m_CurrentOffset]->LoadAllData(pStreamObj, FALSE);
- m_CurrentOffset++;
- }
- }
- if (m_InternalStage == STAGE_PARSE) {
- if (!m_pParser) {
- m_pParser.reset(new CPDF_StreamContentParser(
- m_pObjectHolder->m_pDocument, m_pObjectHolder->m_pPageResources,
- nullptr, nullptr, m_pObjectHolder, m_pObjectHolder->m_pResources,
- &m_pObjectHolder->m_BBox, nullptr, 0));
- m_pParser->GetCurStates()->m_ColorState.SetDefault();
- }
- if (m_CurrentOffset >= m_Size) {
- m_InternalStage = STAGE_CHECKCLIP;
- } else {
- m_CurrentOffset +=
- m_pParser->Parse(m_pData + m_CurrentOffset,
- m_Size - m_CurrentOffset, PARSE_STEP_LIMIT);
- }
- }
- if (m_InternalStage == STAGE_CHECKCLIP) {
- if (m_pType3Char) {
- m_pType3Char->m_bColored = m_pParser->IsColored();
- m_pType3Char->m_Width =
- FXSYS_round(m_pParser->GetType3Data()[0] * 1000);
- m_pType3Char->m_BBox.left =
- FXSYS_round(m_pParser->GetType3Data()[2] * 1000);
- m_pType3Char->m_BBox.bottom =
- FXSYS_round(m_pParser->GetType3Data()[3] * 1000);
- m_pType3Char->m_BBox.right =
- FXSYS_round(m_pParser->GetType3Data()[4] * 1000);
- m_pType3Char->m_BBox.top =
- FXSYS_round(m_pParser->GetType3Data()[5] * 1000);
- }
- for (auto& pObj : *m_pObjectHolder->GetPageObjectList()) {
- if (!pObj->m_ClipPath)
- 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->IsShading())
- 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;
- }
- }
-}
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