// Copyright 2016 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/page/cpdf_streamcontentparser.h" #include #include #include #include #include "core/fpdfapi/font/cpdf_font.h" #include "core/fpdfapi/font/cpdf_type3font.h" #include "core/fpdfapi/page/cpdf_allstates.h" #include "core/fpdfapi/page/cpdf_docpagedata.h" #include "core/fpdfapi/page/cpdf_form.h" #include "core/fpdfapi/page/cpdf_formobject.h" #include "core/fpdfapi/page/cpdf_image.h" #include "core/fpdfapi/page/cpdf_imageobject.h" #include "core/fpdfapi/page/cpdf_meshstream.h" #include "core/fpdfapi/page/cpdf_pageobject.h" #include "core/fpdfapi/page/cpdf_pathobject.h" #include "core/fpdfapi/page/cpdf_shadingobject.h" #include "core/fpdfapi/page/cpdf_shadingpattern.h" #include "core/fpdfapi/page/cpdf_streamparser.h" #include "core/fpdfapi/page/cpdf_textobject.h" #include "core/fpdfapi/parser/cpdf_array.h" #include "core/fpdfapi/parser/cpdf_dictionary.h" #include "core/fpdfapi/parser/cpdf_document.h" #include "core/fpdfapi/parser/cpdf_name.h" #include "core/fpdfapi/parser/cpdf_number.h" #include "core/fpdfapi/parser/cpdf_reference.h" #include "core/fpdfapi/parser/cpdf_stream.h" #include "core/fpdfapi/parser/fpdf_parser_utility.h" #include "core/fxcrt/fx_safe_types.h" #include "core/fxge/cfx_graphstatedata.h" #include "core/fxge/render_defines.h" #include "third_party/base/logging.h" #include "third_party/base/ptr_util.h" #include "third_party/base/span.h" #include "third_party/base/stl_util.h" namespace { const int kMaxFormLevel = 30; const int kSingleCoordinatePair = 1; const int kTensorCoordinatePairs = 16; const int kCoonsCoordinatePairs = 12; const int kSingleColorPerPatch = 1; const int kQuadColorsPerPatch = 4; const char kPathOperatorSubpath = 'm'; const char kPathOperatorLine = 'l'; const char kPathOperatorCubicBezier1 = 'c'; const char kPathOperatorCubicBezier2 = 'v'; const char kPathOperatorCubicBezier3 = 'y'; const char kPathOperatorClosePath = 'h'; const char kPathOperatorRectangle[] = "re"; class CPDF_StreamParserAutoClearer { public: CPDF_StreamParserAutoClearer(UnownedPtr* scoped_variable, CPDF_StreamParser* new_parser) : scoped_variable_(scoped_variable) { *scoped_variable_ = new_parser; } ~CPDF_StreamParserAutoClearer() { *scoped_variable_ = nullptr; } private: UnownedPtr* scoped_variable_; }; CFX_FloatRect GetShadingBBox(CPDF_ShadingPattern* pShading, const CFX_Matrix& matrix) { ShadingType type = pShading->GetShadingType(); const CPDF_Stream* pStream = ToStream(pShading->GetShadingObject()); RetainPtr pCS = pShading->GetCS(); if (!pStream || !pCS) return CFX_FloatRect(); CPDF_MeshStream stream(type, pShading->GetFuncs(), pStream, pCS); if (!stream.Load()) return CFX_FloatRect(); CFX_FloatRect rect; bool bStarted = false; bool bGouraud = type == kFreeFormGouraudTriangleMeshShading || type == kLatticeFormGouraudTriangleMeshShading; int point_count = kSingleCoordinatePair; if (type == kTensorProductPatchMeshShading) point_count = kTensorCoordinatePairs; else if (type == kCoonsPatchMeshShading) point_count = kCoonsCoordinatePairs; int color_count = kSingleColorPerPatch; if (type == kCoonsPatchMeshShading || type == kTensorProductPatchMeshShading) color_count = kQuadColorsPerPatch; while (!stream.BitStream()->IsEOF()) { uint32_t flag = 0; if (type != kLatticeFormGouraudTriangleMeshShading) { if (!stream.CanReadFlag()) break; flag = stream.ReadFlag(); } if (!bGouraud && flag) { point_count -= 4; color_count -= 2; } for (int i = 0; i < point_count; i++) { if (!stream.CanReadCoords()) break; CFX_PointF origin = stream.ReadCoords(); if (bStarted) { rect.UpdateRect(origin); } else { rect.InitRect(origin); bStarted = true; } } FX_SAFE_UINT32 nBits = stream.Components(); nBits *= stream.ComponentBits(); nBits *= color_count; if (!nBits.IsValid()) break; stream.BitStream()->SkipBits(nBits.ValueOrDie()); if (bGouraud) stream.BitStream()->ByteAlign(); } return matrix.TransformRect(rect); } struct AbbrPair { const char* abbr; const char* full_name; }; const AbbrPair kInlineKeyAbbr[] = { {"BPC", "BitsPerComponent"}, {"CS", "ColorSpace"}, {"D", "Decode"}, {"DP", "DecodeParms"}, {"F", "Filter"}, {"H", "Height"}, {"IM", "ImageMask"}, {"I", "Interpolate"}, {"W", "Width"}, }; const AbbrPair kInlineValueAbbr[] = { {"G", "DeviceGray"}, {"RGB", "DeviceRGB"}, {"CMYK", "DeviceCMYK"}, {"I", "Indexed"}, {"AHx", "ASCIIHexDecode"}, {"A85", "ASCII85Decode"}, {"LZW", "LZWDecode"}, {"Fl", "FlateDecode"}, {"RL", "RunLengthDecode"}, {"CCF", "CCITTFaxDecode"}, {"DCT", "DCTDecode"}, }; struct AbbrReplacementOp { bool is_replace_key; ByteString key; ByteStringView replacement; }; ByteStringView FindFullName(const AbbrPair* table, size_t count, ByteStringView abbr) { auto* it = std::find_if(table, table + count, [abbr](const AbbrPair& pair) { return pair.abbr == abbr; }); return it != table + count ? ByteStringView(it->full_name) : ByteStringView(); } void ReplaceAbbr(CPDF_Object* pObj); void ReplaceAbbrInDictionary(CPDF_Dictionary* pDict) { std::vector replacements; { CPDF_DictionaryLocker locker(pDict); for (const auto& it : locker) { ByteString key = it.first; CPDF_Object* value = it.second.Get(); ByteStringView fullname = FindFullName( kInlineKeyAbbr, FX_ArraySize(kInlineKeyAbbr), key.AsStringView()); if (!fullname.IsEmpty()) { AbbrReplacementOp op; op.is_replace_key = true; op.key = std::move(key); op.replacement = fullname; replacements.push_back(op); key = fullname; } if (value->IsName()) { ByteString name = value->GetString(); fullname = FindFullName(kInlineValueAbbr, FX_ArraySize(kInlineValueAbbr), name.AsStringView()); if (!fullname.IsEmpty()) { AbbrReplacementOp op; op.is_replace_key = false; op.key = key; op.replacement = fullname; replacements.push_back(op); } } else { ReplaceAbbr(value); } } } for (const auto& op : replacements) { if (op.is_replace_key) pDict->ReplaceKey(op.key, ByteString(op.replacement)); else pDict->SetNewFor(op.key, ByteString(op.replacement)); } } void ReplaceAbbrInArray(CPDF_Array* pArray) { for (size_t i = 0; i < pArray->size(); ++i) { CPDF_Object* pElement = pArray->GetObjectAt(i); if (pElement->IsName()) { ByteString name = pElement->GetString(); ByteStringView fullname = FindFullName(kInlineValueAbbr, FX_ArraySize(kInlineValueAbbr), name.AsStringView()); if (!fullname.IsEmpty()) pArray->SetNewAt(i, ByteString(fullname)); } else { ReplaceAbbr(pElement); } } } void ReplaceAbbr(CPDF_Object* pObj) { CPDF_Dictionary* pDict = pObj->AsDictionary(); if (pDict) { ReplaceAbbrInDictionary(pDict); return; } CPDF_Array* pArray = pObj->AsArray(); if (pArray) ReplaceAbbrInArray(pArray); } } // namespace CPDF_StreamContentParser::CPDF_StreamContentParser( CPDF_Document* pDocument, CPDF_Dictionary* pPageResources, CPDF_Dictionary* pParentResources, const CFX_Matrix* pmtContentToUser, CPDF_PageObjectHolder* pObjHolder, CPDF_Dictionary* pResources, const CFX_FloatRect& rcBBox, const CPDF_AllStates* pStates, std::set* pParsedSet) : m_pDocument(pDocument), m_pPageResources(pPageResources), m_pParentResources(pParentResources), m_pResources(CPDF_Form::ChooseResourcesDict(pResources, pParentResources, pPageResources)), m_pObjectHolder(pObjHolder), m_ParsedSet(pParsedSet), m_BBox(rcBBox), m_pCurStates(pdfium::MakeUnique()) { if (pmtContentToUser) m_mtContentToUser = *pmtContentToUser; if (pStates) { m_pCurStates->Copy(*pStates); } else { m_pCurStates->m_GeneralState.Emplace(); m_pCurStates->m_GraphState.Emplace(); m_pCurStates->m_TextState.Emplace(); m_pCurStates->m_ColorState.Emplace(); } // Add the sentinel. m_ContentMarksStack.push(pdfium::MakeUnique()); } CPDF_StreamContentParser::~CPDF_StreamContentParser() { ClearAllParams(); } int CPDF_StreamContentParser::GetNextParamPos() { if (m_ParamCount == kParamBufSize) { m_ParamStartPos++; if (m_ParamStartPos == kParamBufSize) { m_ParamStartPos = 0; } if (m_ParamBuf[m_ParamStartPos].m_Type == ContentParam::OBJECT) m_ParamBuf[m_ParamStartPos].m_pObject.Reset(); return m_ParamStartPos; } int index = m_ParamStartPos + m_ParamCount; if (index >= kParamBufSize) { index -= kParamBufSize; } m_ParamCount++; return index; } void CPDF_StreamContentParser::AddNameParam(ByteStringView bsName) { ContentParam& param = m_ParamBuf[GetNextParamPos()]; param.m_Type = ContentParam::NAME; param.m_Name = bsName.Contains('#') ? PDF_NameDecode(bsName) : ByteString(bsName); } void CPDF_StreamContentParser::AddNumberParam(ByteStringView str) { ContentParam& param = m_ParamBuf[GetNextParamPos()]; param.m_Type = ContentParam::NUMBER; param.m_Number = FX_Number(str); } void CPDF_StreamContentParser::AddObjectParam(RetainPtr pObj) { ContentParam& param = m_ParamBuf[GetNextParamPos()]; param.m_Type = ContentParam::OBJECT; param.m_pObject = std::move(pObj); } void CPDF_StreamContentParser::ClearAllParams() { uint32_t index = m_ParamStartPos; for (uint32_t i = 0; i < m_ParamCount; i++) { if (m_ParamBuf[index].m_Type == ContentParam::OBJECT) m_ParamBuf[index].m_pObject.Reset(); index++; if (index == kParamBufSize) index = 0; } m_ParamStartPos = 0; m_ParamCount = 0; } CPDF_Object* CPDF_StreamContentParser::GetObject(uint32_t index) { if (index >= m_ParamCount) { return nullptr; } int real_index = m_ParamStartPos + m_ParamCount - index - 1; if (real_index >= kParamBufSize) { real_index -= kParamBufSize; } ContentParam& param = m_ParamBuf[real_index]; if (param.m_Type == ContentParam::NUMBER) { param.m_Type = ContentParam::OBJECT; param.m_pObject = param.m_Number.IsInteger() ? pdfium::MakeRetain(param.m_Number.GetSigned()) : pdfium::MakeRetain(param.m_Number.GetFloat()); return param.m_pObject.Get(); } if (param.m_Type == ContentParam::NAME) { param.m_Type = ContentParam::OBJECT; param.m_pObject = m_pDocument->New(param.m_Name); return param.m_pObject.Get(); } if (param.m_Type == ContentParam::OBJECT) return param.m_pObject.Get(); NOTREACHED(); return nullptr; } ByteString CPDF_StreamContentParser::GetString(uint32_t index) const { if (index >= m_ParamCount) return ByteString(); int real_index = m_ParamStartPos + m_ParamCount - index - 1; if (real_index >= kParamBufSize) real_index -= kParamBufSize; const ContentParam& param = m_ParamBuf[real_index]; if (param.m_Type == ContentParam::NAME) return param.m_Name; if (param.m_Type == 0 && param.m_pObject) return param.m_pObject->GetString(); return ByteString(); } float CPDF_StreamContentParser::GetNumber(uint32_t index) const { if (index >= m_ParamCount) return 0; int real_index = m_ParamStartPos + m_ParamCount - index - 1; if (real_index >= kParamBufSize) real_index -= kParamBufSize; const ContentParam& param = m_ParamBuf[real_index]; if (param.m_Type == ContentParam::NUMBER) return param.m_Number.GetFloat(); if (param.m_Type == 0 && param.m_pObject) return param.m_pObject->GetNumber(); return 0; } std::vector CPDF_StreamContentParser::GetNumbers(size_t count) const { std::vector values(count); for (size_t i = 0; i < count; ++i) values[i] = GetNumber(count - i - 1); return values; } void CPDF_StreamContentParser::SetGraphicStates(CPDF_PageObject* pObj, bool bColor, bool bText, bool bGraph) { pObj->m_GeneralState = m_pCurStates->m_GeneralState; pObj->m_ClipPath = m_pCurStates->m_ClipPath; pObj->m_ContentMarks = *m_ContentMarksStack.top(); if (bColor) { pObj->m_ColorState = m_pCurStates->m_ColorState; } if (bGraph) { pObj->m_GraphState = m_pCurStates->m_GraphState; } if (bText) { pObj->m_TextState = m_pCurStates->m_TextState; } } // static CPDF_StreamContentParser::OpCodes CPDF_StreamContentParser::InitializeOpCodes() { return OpCodes({ {FXBSTR_ID('"', 0, 0, 0), &CPDF_StreamContentParser::Handle_NextLineShowText_Space}, {FXBSTR_ID('\'', 0, 0, 0), &CPDF_StreamContentParser::Handle_NextLineShowText}, {FXBSTR_ID('B', 0, 0, 0), &CPDF_StreamContentParser::Handle_FillStrokePath}, {FXBSTR_ID('B', '*', 0, 0), &CPDF_StreamContentParser::Handle_EOFillStrokePath}, {FXBSTR_ID('B', 'D', 'C', 0), &CPDF_StreamContentParser::Handle_BeginMarkedContent_Dictionary}, {FXBSTR_ID('B', 'I', 0, 0), &CPDF_StreamContentParser::Handle_BeginImage}, {FXBSTR_ID('B', 'M', 'C', 0), &CPDF_StreamContentParser::Handle_BeginMarkedContent}, {FXBSTR_ID('B', 'T', 0, 0), &CPDF_StreamContentParser::Handle_BeginText}, {FXBSTR_ID('C', 'S', 0, 0), &CPDF_StreamContentParser::Handle_SetColorSpace_Stroke}, {FXBSTR_ID('D', 'P', 0, 0), &CPDF_StreamContentParser::Handle_MarkPlace_Dictionary}, {FXBSTR_ID('D', 'o', 0, 0), &CPDF_StreamContentParser::Handle_ExecuteXObject}, {FXBSTR_ID('E', 'I', 0, 0), &CPDF_StreamContentParser::Handle_EndImage}, {FXBSTR_ID('E', 'M', 'C', 0), &CPDF_StreamContentParser::Handle_EndMarkedContent}, {FXBSTR_ID('E', 'T', 0, 0), &CPDF_StreamContentParser::Handle_EndText}, {FXBSTR_ID('F', 0, 0, 0), &CPDF_StreamContentParser::Handle_FillPathOld}, {FXBSTR_ID('G', 0, 0, 0), &CPDF_StreamContentParser::Handle_SetGray_Stroke}, {FXBSTR_ID('I', 'D', 0, 0), &CPDF_StreamContentParser::Handle_BeginImageData}, {FXBSTR_ID('J', 0, 0, 0), &CPDF_StreamContentParser::Handle_SetLineCap}, {FXBSTR_ID('K', 0, 0, 0), &CPDF_StreamContentParser::Handle_SetCMYKColor_Stroke}, {FXBSTR_ID('M', 0, 0, 0), &CPDF_StreamContentParser::Handle_SetMiterLimit}, {FXBSTR_ID('M', 'P', 0, 0), &CPDF_StreamContentParser::Handle_MarkPlace}, {FXBSTR_ID('Q', 0, 0, 0), &CPDF_StreamContentParser::Handle_RestoreGraphState}, {FXBSTR_ID('R', 'G', 0, 0), &CPDF_StreamContentParser::Handle_SetRGBColor_Stroke}, {FXBSTR_ID('S', 0, 0, 0), &CPDF_StreamContentParser::Handle_StrokePath}, {FXBSTR_ID('S', 'C', 0, 0), &CPDF_StreamContentParser::Handle_SetColor_Stroke}, {FXBSTR_ID('S', 'C', 'N', 0), &CPDF_StreamContentParser::Handle_SetColorPS_Stroke}, {FXBSTR_ID('T', '*', 0, 0), &CPDF_StreamContentParser::Handle_MoveToNextLine}, {FXBSTR_ID('T', 'D', 0, 0), &CPDF_StreamContentParser::Handle_MoveTextPoint_SetLeading}, {FXBSTR_ID('T', 'J', 0, 0), &CPDF_StreamContentParser::Handle_ShowText_Positioning}, {FXBSTR_ID('T', 'L', 0, 0), &CPDF_StreamContentParser::Handle_SetTextLeading}, {FXBSTR_ID('T', 'c', 0, 0), &CPDF_StreamContentParser::Handle_SetCharSpace}, {FXBSTR_ID('T', 'd', 0, 0), &CPDF_StreamContentParser::Handle_MoveTextPoint}, {FXBSTR_ID('T', 'f', 0, 0), &CPDF_StreamContentParser::Handle_SetFont}, {FXBSTR_ID('T', 'j', 0, 0), &CPDF_StreamContentParser::Handle_ShowText}, {FXBSTR_ID('T', 'm', 0, 0), &CPDF_StreamContentParser::Handle_SetTextMatrix}, {FXBSTR_ID('T', 'r', 0, 0), &CPDF_StreamContentParser::Handle_SetTextRenderMode}, {FXBSTR_ID('T', 's', 0, 0), &CPDF_StreamContentParser::Handle_SetTextRise}, {FXBSTR_ID('T', 'w', 0, 0), &CPDF_StreamContentParser::Handle_SetWordSpace}, {FXBSTR_ID('T', 'z', 0, 0), &CPDF_StreamContentParser::Handle_SetHorzScale}, {FXBSTR_ID('W', 0, 0, 0), &CPDF_StreamContentParser::Handle_Clip}, {FXBSTR_ID('W', '*', 0, 0), &CPDF_StreamContentParser::Handle_EOClip}, {FXBSTR_ID('b', 0, 0, 0), &CPDF_StreamContentParser::Handle_CloseFillStrokePath}, {FXBSTR_ID('b', '*', 0, 0), &CPDF_StreamContentParser::Handle_CloseEOFillStrokePath}, {FXBSTR_ID('c', 0, 0, 0), &CPDF_StreamContentParser::Handle_CurveTo_123}, {FXBSTR_ID('c', 'm', 0, 0), &CPDF_StreamContentParser::Handle_ConcatMatrix}, {FXBSTR_ID('c', 's', 0, 0), &CPDF_StreamContentParser::Handle_SetColorSpace_Fill}, {FXBSTR_ID('d', 0, 0, 0), &CPDF_StreamContentParser::Handle_SetDash}, {FXBSTR_ID('d', '0', 0, 0), &CPDF_StreamContentParser::Handle_SetCharWidth}, {FXBSTR_ID('d', '1', 0, 0), &CPDF_StreamContentParser::Handle_SetCachedDevice}, {FXBSTR_ID('f', 0, 0, 0), &CPDF_StreamContentParser::Handle_FillPath}, {FXBSTR_ID('f', '*', 0, 0), &CPDF_StreamContentParser::Handle_EOFillPath}, {FXBSTR_ID('g', 0, 0, 0), &CPDF_StreamContentParser::Handle_SetGray_Fill}, {FXBSTR_ID('g', 's', 0, 0), &CPDF_StreamContentParser::Handle_SetExtendGraphState}, {FXBSTR_ID('h', 0, 0, 0), &CPDF_StreamContentParser::Handle_ClosePath}, {FXBSTR_ID('i', 0, 0, 0), &CPDF_StreamContentParser::Handle_SetFlat}, {FXBSTR_ID('j', 0, 0, 0), &CPDF_StreamContentParser::Handle_SetLineJoin}, {FXBSTR_ID('k', 0, 0, 0), &CPDF_StreamContentParser::Handle_SetCMYKColor_Fill}, {FXBSTR_ID('l', 0, 0, 0), &CPDF_StreamContentParser::Handle_LineTo}, {FXBSTR_ID('m', 0, 0, 0), &CPDF_StreamContentParser::Handle_MoveTo}, {FXBSTR_ID('n', 0, 0, 0), &CPDF_StreamContentParser::Handle_EndPath}, {FXBSTR_ID('q', 0, 0, 0), &CPDF_StreamContentParser::Handle_SaveGraphState}, {FXBSTR_ID('r', 'e', 0, 0), &CPDF_StreamContentParser::Handle_Rectangle}, {FXBSTR_ID('r', 'g', 0, 0), &CPDF_StreamContentParser::Handle_SetRGBColor_Fill}, {FXBSTR_ID('r', 'i', 0, 0), &CPDF_StreamContentParser::Handle_SetRenderIntent}, {FXBSTR_ID('s', 0, 0, 0), &CPDF_StreamContentParser::Handle_CloseStrokePath}, {FXBSTR_ID('s', 'c', 0, 0), &CPDF_StreamContentParser::Handle_SetColor_Fill}, {FXBSTR_ID('s', 'c', 'n', 0), &CPDF_StreamContentParser::Handle_SetColorPS_Fill}, {FXBSTR_ID('s', 'h', 0, 0), &CPDF_StreamContentParser::Handle_ShadeFill}, {FXBSTR_ID('v', 0, 0, 0), &CPDF_StreamContentParser::Handle_CurveTo_23}, {FXBSTR_ID('w', 0, 0, 0), &CPDF_StreamContentParser::Handle_SetLineWidth}, {FXBSTR_ID('y', 0, 0, 0), &CPDF_StreamContentParser::Handle_CurveTo_13}, }); } void CPDF_StreamContentParser::OnOperator(ByteStringView op) { static const OpCodes s_OpCodes = InitializeOpCodes(); auto it = s_OpCodes.find(op.GetID()); if (it != s_OpCodes.end()) (this->*it->second)(); } void CPDF_StreamContentParser::Handle_CloseFillStrokePath() { Handle_ClosePath(); AddPathObject(FXFILL_WINDING, true); } void CPDF_StreamContentParser::Handle_FillStrokePath() { AddPathObject(FXFILL_WINDING, true); } void CPDF_StreamContentParser::Handle_CloseEOFillStrokePath() { AddPathPoint(m_PathStartX, m_PathStartY, FXPT_TYPE::LineTo, true); AddPathObject(FXFILL_ALTERNATE, true); } void CPDF_StreamContentParser::Handle_EOFillStrokePath() { AddPathObject(FXFILL_ALTERNATE, true); } void CPDF_StreamContentParser::Handle_BeginMarkedContent_Dictionary() { CPDF_Object* pProperty = GetObject(0); if (!pProperty) return; ByteString tag = GetString(1); std::unique_ptr new_marks = m_ContentMarksStack.top()->Clone(); if (pProperty->IsName()) { ByteString property_name = pProperty->GetString(); CPDF_Dictionary* pHolder = FindResourceHolder("Properties"); if (!pHolder || !pHolder->GetDictFor(property_name)) return; new_marks->AddMarkWithPropertiesHolder(tag, pHolder, property_name); } else if (pProperty->IsDictionary()) { new_marks->AddMarkWithDirectDict(tag, pProperty->AsDictionary()); } else { return; } m_ContentMarksStack.push(std::move(new_marks)); } void CPDF_StreamContentParser::Handle_BeginImage() { FX_FILESIZE savePos = m_pSyntax->GetPos(); auto pDict = m_pDocument->New(); while (1) { CPDF_StreamParser::SyntaxType type = m_pSyntax->ParseNextElement(); if (type == CPDF_StreamParser::Keyword) { if (m_pSyntax->GetWord() != "ID") { m_pSyntax->SetPos(savePos); return; } } if (type != CPDF_StreamParser::Name) { break; } auto word = m_pSyntax->GetWord(); ByteString key(word.Last(word.GetLength() - 1)); auto pObj = m_pSyntax->ReadNextObject(false, false, 0); if (!key.IsEmpty()) { if (pObj && !pObj->IsInline()) { pDict->SetNewFor(key, m_pDocument.Get(), pObj->GetObjNum()); } else { pDict->SetFor(key, std::move(pObj)); } } } ReplaceAbbr(pDict.Get()); CPDF_Object* pCSObj = nullptr; if (pDict->KeyExist("ColorSpace")) { pCSObj = pDict->GetDirectObjectFor("ColorSpace"); if (pCSObj->IsName()) { ByteString name = pCSObj->GetString(); if (name != "DeviceRGB" && name != "DeviceGray" && name != "DeviceCMYK") { pCSObj = FindResourceObj("ColorSpace", name); if (pCSObj && pCSObj->IsInline()) pDict->SetFor("ColorSpace", pCSObj->Clone()); } } } pDict->SetNewFor("Subtype", "Image"); RetainPtr pStream = m_pSyntax->ReadInlineStream(m_pDocument.Get(), std::move(pDict), pCSObj); while (1) { CPDF_StreamParser::SyntaxType type = m_pSyntax->ParseNextElement(); if (type == CPDF_StreamParser::EndOfData) { break; } if (type != CPDF_StreamParser::Keyword) { continue; } if (m_pSyntax->GetWord() == "EI") { break; } } CPDF_ImageObject* pObj = AddImage(std::move(pStream)); // Record the bounding box of this image, so rendering code can draw it // properly. if (pObj && pObj->GetImage()->IsMask()) m_pObjectHolder->AddImageMaskBoundingBox(pObj->GetRect()); } void CPDF_StreamContentParser::Handle_BeginMarkedContent() { std::unique_ptr new_marks = m_ContentMarksStack.top()->Clone(); new_marks->AddMark(GetString(0)); m_ContentMarksStack.push(std::move(new_marks)); } void CPDF_StreamContentParser::Handle_BeginText() { m_pCurStates->m_TextMatrix = CFX_Matrix(); OnChangeTextMatrix(); m_pCurStates->m_TextPos = CFX_PointF(); m_pCurStates->m_TextLinePos = CFX_PointF(); } void CPDF_StreamContentParser::Handle_CurveTo_123() { AddPathPoint(GetNumber(5), GetNumber(4), FXPT_TYPE::BezierTo, false); AddPathPoint(GetNumber(3), GetNumber(2), FXPT_TYPE::BezierTo, false); AddPathPoint(GetNumber(1), GetNumber(0), FXPT_TYPE::BezierTo, false); } void CPDF_StreamContentParser::Handle_ConcatMatrix() { CFX_Matrix new_matrix(GetNumber(5), GetNumber(4), GetNumber(3), GetNumber(2), GetNumber(1), GetNumber(0)); m_pCurStates->m_CTM = new_matrix * m_pCurStates->m_CTM; OnChangeTextMatrix(); } void CPDF_StreamContentParser::Handle_SetColorSpace_Fill() { RetainPtr pCS = FindColorSpace(GetString(0)); if (!pCS) return; m_pCurStates->m_ColorState.GetMutableFillColor()->SetColorSpace(pCS); } void CPDF_StreamContentParser::Handle_SetColorSpace_Stroke() { RetainPtr pCS = FindColorSpace(GetString(0)); if (!pCS) return; m_pCurStates->m_ColorState.GetMutableStrokeColor()->SetColorSpace(pCS); } void CPDF_StreamContentParser::Handle_SetDash() { CPDF_Array* pArray = ToArray(GetObject(1)); if (!pArray) return; m_pCurStates->SetLineDash(pArray, GetNumber(0), 1.0f); } void CPDF_StreamContentParser::Handle_SetCharWidth() { m_Type3Data[0] = GetNumber(1); m_Type3Data[1] = GetNumber(0); m_bColored = true; } void CPDF_StreamContentParser::Handle_SetCachedDevice() { for (int i = 0; i < 6; i++) { m_Type3Data[i] = GetNumber(5 - i); } m_bColored = false; } void CPDF_StreamContentParser::Handle_ExecuteXObject() { ByteString name = GetString(0); if (name == m_LastImageName && m_pLastImage && m_pLastImage->GetStream() && m_pLastImage->GetStream()->GetObjNum()) { CPDF_ImageObject* pObj = AddImage(m_pLastImage); // Record the bounding box of this image, so rendering code can draw it // properly. if (pObj && pObj->GetImage()->IsMask()) m_pObjectHolder->AddImageMaskBoundingBox(pObj->GetRect()); return; } CPDF_Stream* pXObject = ToStream(FindResourceObj("XObject", name)); if (!pXObject) { m_bResourceMissing = true; return; } ByteString type; if (pXObject->GetDict()) type = pXObject->GetDict()->GetStringFor("Subtype"); if (type == "Form") { AddForm(pXObject); return; } if (type == "Image") { CPDF_ImageObject* pObj = pXObject->IsInline() ? AddImage(ToStream(pXObject->Clone())) : AddImage(pXObject->GetObjNum()); m_LastImageName = std::move(name); if (pObj) { m_pLastImage = pObj->GetImage(); if (m_pLastImage->IsMask()) m_pObjectHolder->AddImageMaskBoundingBox(pObj->GetRect()); } } } void CPDF_StreamContentParser::AddForm(CPDF_Stream* pStream) { CPDF_AllStates status; status.m_GeneralState = m_pCurStates->m_GeneralState; status.m_GraphState = m_pCurStates->m_GraphState; status.m_ColorState = m_pCurStates->m_ColorState; status.m_TextState = m_pCurStates->m_TextState; auto form = pdfium::MakeUnique( m_pDocument.Get(), m_pPageResources.Get(), pStream, m_pResources.Get()); form->ParseContent(&status, nullptr, m_ParsedSet.Get()); CFX_Matrix matrix = m_pCurStates->m_CTM * m_mtContentToUser; auto pFormObj = pdfium::MakeUnique(GetCurrentStreamIndex(), std::move(form), matrix); if (!m_pObjectHolder->BackgroundAlphaNeeded() && pFormObj->form()->BackgroundAlphaNeeded()) { m_pObjectHolder->SetBackgroundAlphaNeeded(true); } pFormObj->CalcBoundingBox(); SetGraphicStates(pFormObj.get(), true, true, true); m_pObjectHolder->AppendPageObject(std::move(pFormObj)); } CPDF_ImageObject* CPDF_StreamContentParser::AddImage( RetainPtr pStream) { if (!pStream) return nullptr; auto pImageObj = pdfium::MakeUnique(GetCurrentStreamIndex()); pImageObj->SetImage( pdfium::MakeRetain(m_pDocument.Get(), std::move(pStream))); return AddImageObject(std::move(pImageObj)); } CPDF_ImageObject* CPDF_StreamContentParser::AddImage(uint32_t streamObjNum) { auto pImageObj = pdfium::MakeUnique(GetCurrentStreamIndex()); pImageObj->SetImage(CPDF_DocPageData::FromDocument(m_pDocument.Get()) ->GetImage(streamObjNum)); return AddImageObject(std::move(pImageObj)); } CPDF_ImageObject* CPDF_StreamContentParser::AddImage( const RetainPtr& pImage) { if (!pImage) return nullptr; auto pImageObj = pdfium::MakeUnique(GetCurrentStreamIndex()); pImageObj->SetImage(CPDF_DocPageData::FromDocument(m_pDocument.Get()) ->GetImage(pImage->GetStream()->GetObjNum())); return AddImageObject(std::move(pImageObj)); } CPDF_ImageObject* CPDF_StreamContentParser::AddImageObject( std::unique_ptr pImageObj) { SetGraphicStates(pImageObj.get(), pImageObj->GetImage()->IsMask(), false, false); CFX_Matrix ImageMatrix = m_pCurStates->m_CTM * m_mtContentToUser; pImageObj->set_matrix(ImageMatrix); pImageObj->CalcBoundingBox(); CPDF_ImageObject* pRet = pImageObj.get(); m_pObjectHolder->AppendPageObject(std::move(pImageObj)); return pRet; } std::vector CPDF_StreamContentParser::GetColors() const { ASSERT(m_ParamCount > 0); return GetNumbers(m_ParamCount); } std::vector CPDF_StreamContentParser::GetNamedColors() const { ASSERT(m_ParamCount > 0); const uint32_t nvalues = m_ParamCount - 1; std::vector values(nvalues); for (size_t i = 0; i < nvalues; ++i) values[i] = GetNumber(m_ParamCount - i - 1); return values; } void CPDF_StreamContentParser::Handle_MarkPlace_Dictionary() {} void CPDF_StreamContentParser::Handle_EndImage() {} void CPDF_StreamContentParser::Handle_EndMarkedContent() { // First element is a sentinel, so do not pop it, ever. This may come up if // the EMCs are mismatched with the BMC/BDCs. if (m_ContentMarksStack.size() > 1) m_ContentMarksStack.pop(); } void CPDF_StreamContentParser::Handle_EndText() { if (m_ClipTextList.empty()) return; if (TextRenderingModeIsClipMode(m_pCurStates->m_TextState.GetTextMode())) m_pCurStates->m_ClipPath.AppendTexts(&m_ClipTextList); m_ClipTextList.clear(); } void CPDF_StreamContentParser::Handle_FillPath() { AddPathObject(FXFILL_WINDING, false); } void CPDF_StreamContentParser::Handle_FillPathOld() { AddPathObject(FXFILL_WINDING, false); } void CPDF_StreamContentParser::Handle_EOFillPath() { AddPathObject(FXFILL_ALTERNATE, false); } void CPDF_StreamContentParser::Handle_SetGray_Fill() { RetainPtr pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICEGRAY); m_pCurStates->m_ColorState.SetFillColor(pCS, GetNumbers(1)); } void CPDF_StreamContentParser::Handle_SetGray_Stroke() { RetainPtr pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICEGRAY); m_pCurStates->m_ColorState.SetStrokeColor(pCS, GetNumbers(1)); } void CPDF_StreamContentParser::Handle_SetExtendGraphState() { ByteString name = GetString(0); CPDF_Dictionary* pGS = ToDictionary(FindResourceObj("ExtGState", name)); if (!pGS) { m_bResourceMissing = true; return; } m_pCurStates->ProcessExtGS(pGS, this); } void CPDF_StreamContentParser::Handle_ClosePath() { if (m_PathPoints.empty()) return; if (m_PathStartX != m_PathCurrentX || m_PathStartY != m_PathCurrentY) AddPathPoint(m_PathStartX, m_PathStartY, FXPT_TYPE::LineTo, true); else if (m_PathPoints.back().m_Type != FXPT_TYPE::MoveTo) m_PathPoints.back().m_CloseFigure = true; } void CPDF_StreamContentParser::Handle_SetFlat() { m_pCurStates->m_GeneralState.SetFlatness(GetNumber(0)); } void CPDF_StreamContentParser::Handle_BeginImageData() {} void CPDF_StreamContentParser::Handle_SetLineJoin() { m_pCurStates->m_GraphState.SetLineJoin( static_cast(GetInteger(0))); } void CPDF_StreamContentParser::Handle_SetLineCap() { m_pCurStates->m_GraphState.SetLineCap( static_cast(GetInteger(0))); } void CPDF_StreamContentParser::Handle_SetCMYKColor_Fill() { if (m_ParamCount != 4) return; RetainPtr pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICECMYK); m_pCurStates->m_ColorState.SetFillColor(pCS, GetNumbers(4)); } void CPDF_StreamContentParser::Handle_SetCMYKColor_Stroke() { if (m_ParamCount != 4) return; RetainPtr pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICECMYK); m_pCurStates->m_ColorState.SetStrokeColor(pCS, GetNumbers(4)); } void CPDF_StreamContentParser::Handle_LineTo() { if (m_ParamCount != 2) return; AddPathPoint(GetNumber(1), GetNumber(0), FXPT_TYPE::LineTo, false); } void CPDF_StreamContentParser::Handle_MoveTo() { if (m_ParamCount != 2) return; AddPathPoint(GetNumber(1), GetNumber(0), FXPT_TYPE::MoveTo, false); ParsePathObject(); } void CPDF_StreamContentParser::Handle_SetMiterLimit() { m_pCurStates->m_GraphState.SetMiterLimit(GetNumber(0)); } void CPDF_StreamContentParser::Handle_MarkPlace() {} void CPDF_StreamContentParser::Handle_EndPath() { AddPathObject(0, false); } void CPDF_StreamContentParser::Handle_SaveGraphState() { auto pStates = pdfium::MakeUnique(); pStates->Copy(*m_pCurStates); m_StateStack.push_back(std::move(pStates)); } void CPDF_StreamContentParser::Handle_RestoreGraphState() { if (m_StateStack.empty()) return; std::unique_ptr pStates = std::move(m_StateStack.back()); m_StateStack.pop_back(); m_pCurStates->Copy(*pStates); } void CPDF_StreamContentParser::Handle_Rectangle() { float x = GetNumber(3), y = GetNumber(2); float w = GetNumber(1), h = GetNumber(0); AddPathRect(x, y, w, h); } void CPDF_StreamContentParser::AddPathRect(float x, float y, float w, float h) { AddPathPoint(x, y, FXPT_TYPE::MoveTo, false); AddPathPoint(x + w, y, FXPT_TYPE::LineTo, false); AddPathPoint(x + w, y + h, FXPT_TYPE::LineTo, false); AddPathPoint(x, y + h, FXPT_TYPE::LineTo, false); AddPathPoint(x, y, FXPT_TYPE::LineTo, true); } void CPDF_StreamContentParser::Handle_SetRGBColor_Fill() { if (m_ParamCount != 3) return; RetainPtr pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICERGB); m_pCurStates->m_ColorState.SetFillColor(pCS, GetNumbers(3)); } void CPDF_StreamContentParser::Handle_SetRGBColor_Stroke() { if (m_ParamCount != 3) return; RetainPtr pCS = CPDF_ColorSpace::GetStockCS(PDFCS_DEVICERGB); m_pCurStates->m_ColorState.SetStrokeColor(pCS, GetNumbers(3)); } void CPDF_StreamContentParser::Handle_SetRenderIntent() {} void CPDF_StreamContentParser::Handle_CloseStrokePath() { Handle_ClosePath(); AddPathObject(0, true); } void CPDF_StreamContentParser::Handle_StrokePath() { AddPathObject(0, true); } void CPDF_StreamContentParser::Handle_SetColor_Fill() { int nargs = std::min(m_ParamCount, 4U); m_pCurStates->m_ColorState.SetFillColor(nullptr, GetNumbers(nargs)); } void CPDF_StreamContentParser::Handle_SetColor_Stroke() { int nargs = std::min(m_ParamCount, 4U); m_pCurStates->m_ColorState.SetStrokeColor(nullptr, GetNumbers(nargs)); } void CPDF_StreamContentParser::Handle_SetColorPS_Fill() { CPDF_Object* pLastParam = GetObject(0); if (!pLastParam) return; if (!pLastParam->IsName()) { m_pCurStates->m_ColorState.SetFillColor(nullptr, GetColors()); return; } // A valid |pLastParam| implies |m_ParamCount| > 0, so GetNamedColors() call // below is safe. RetainPtr pPattern = FindPattern(GetString(0), false); if (pPattern) m_pCurStates->m_ColorState.SetFillPattern(pPattern, GetNamedColors()); } void CPDF_StreamContentParser::Handle_SetColorPS_Stroke() { CPDF_Object* pLastParam = GetObject(0); if (!pLastParam) return; if (!pLastParam->IsName()) { m_pCurStates->m_ColorState.SetStrokeColor(nullptr, GetColors()); return; } // A valid |pLastParam| implies |m_ParamCount| > 0, so GetNamedColors() call // below is safe. RetainPtr pPattern = FindPattern(GetString(0), false); if (pPattern) m_pCurStates->m_ColorState.SetStrokePattern(pPattern, GetNamedColors()); } void CPDF_StreamContentParser::Handle_ShadeFill() { RetainPtr pPattern = FindPattern(GetString(0), true); if (!pPattern) return; CPDF_ShadingPattern* pShading = pPattern->AsShadingPattern(); if (!pShading) return; if (!pShading->IsShadingObject() || !pShading->Load()) return; CFX_Matrix matrix = m_pCurStates->m_CTM * m_mtContentToUser; auto pObj = pdfium::MakeUnique(GetCurrentStreamIndex(), pShading, matrix); SetGraphicStates(pObj.get(), false, false, false); CFX_FloatRect bbox = pObj->m_ClipPath.HasRef() ? pObj->m_ClipPath.GetClipBox() : m_BBox; if (pShading->IsMeshShading()) bbox.Intersect(GetShadingBBox(pShading, pObj->matrix())); pObj->SetRect(bbox); m_pObjectHolder->AppendPageObject(std::move(pObj)); } void CPDF_StreamContentParser::Handle_SetCharSpace() { m_pCurStates->m_TextState.SetCharSpace(GetNumber(0)); } void CPDF_StreamContentParser::Handle_MoveTextPoint() { m_pCurStates->m_TextLinePos += CFX_PointF(GetNumber(1), GetNumber(0)); m_pCurStates->m_TextPos = m_pCurStates->m_TextLinePos; } void CPDF_StreamContentParser::Handle_MoveTextPoint_SetLeading() { Handle_MoveTextPoint(); m_pCurStates->m_TextLeading = -GetNumber(0); } void CPDF_StreamContentParser::Handle_SetFont() { float fs = GetNumber(0); if (fs == 0) { constexpr float kDefaultFontSize = 0.0f; fs = kDefaultFontSize; } m_pCurStates->m_TextState.SetFontSize(fs); RetainPtr pFont = FindFont(GetString(1)); if (pFont) m_pCurStates->m_TextState.SetFont(pFont); } CPDF_Dictionary* CPDF_StreamContentParser::FindResourceHolder( const ByteString& type) { if (!m_pResources) return nullptr; CPDF_Dictionary* pDict = m_pResources->GetDictFor(type); if (pDict) return pDict; if (m_pResources == m_pPageResources || !m_pPageResources) return nullptr; return m_pPageResources->GetDictFor(type); } CPDF_Object* CPDF_StreamContentParser::FindResourceObj(const ByteString& type, const ByteString& name) { CPDF_Dictionary* pHolder = FindResourceHolder(type); return pHolder ? pHolder->GetDirectObjectFor(name) : nullptr; } RetainPtr CPDF_StreamContentParser::FindFont( const ByteString& name) { CPDF_Dictionary* pFontDict = ToDictionary(FindResourceObj("Font", name)); if (!pFontDict) { m_bResourceMissing = true; return CPDF_Font::GetStockFont(m_pDocument.Get(), CFX_Font::kDefaultAnsiFontName); } RetainPtr pFont = CPDF_DocPageData::FromDocument(m_pDocument.Get())->GetFont(pFontDict); if (pFont && pFont->IsType3Font()) { pFont->AsType3Font()->SetPageResources(m_pResources.Get()); pFont->AsType3Font()->CheckType3FontMetrics(); } return pFont; } RetainPtr CPDF_StreamContentParser::FindColorSpace( const ByteString& name) { if (name == "Pattern") return CPDF_ColorSpace::GetStockCS(PDFCS_PATTERN); if (name == "DeviceGray" || name == "DeviceCMYK" || name == "DeviceRGB") { ByteString defname = "Default"; defname += name.Last(name.GetLength() - 7); const CPDF_Object* pDefObj = FindResourceObj("ColorSpace", defname); if (!pDefObj) { if (name == "DeviceGray") return CPDF_ColorSpace::GetStockCS(PDFCS_DEVICEGRAY); if (name == "DeviceRGB") return CPDF_ColorSpace::GetStockCS(PDFCS_DEVICERGB); return CPDF_ColorSpace::GetStockCS(PDFCS_DEVICECMYK); } return CPDF_DocPageData::FromDocument(m_pDocument.Get()) ->GetColorSpace(pDefObj, nullptr); } const CPDF_Object* pCSObj = FindResourceObj("ColorSpace", name); if (!pCSObj) { m_bResourceMissing = true; return nullptr; } return CPDF_DocPageData::FromDocument(m_pDocument.Get()) ->GetColorSpace(pCSObj, nullptr); } RetainPtr CPDF_StreamContentParser::FindPattern( const ByteString& name, bool bShading) { CPDF_Object* pPattern = FindResourceObj(bShading ? "Shading" : "Pattern", name); if (!pPattern || (!pPattern->IsDictionary() && !pPattern->IsStream())) { m_bResourceMissing = true; return nullptr; } return CPDF_DocPageData::FromDocument(m_pDocument.Get()) ->GetPattern(pPattern, bShading, m_pCurStates->m_ParentMatrix); } void CPDF_StreamContentParser::AddTextObject(const ByteString* pStrs, float fInitKerning, const std::vector& kernings, size_t nSegs) { RetainPtr pFont = m_pCurStates->m_TextState.GetFont(); if (!pFont) return; if (fInitKerning != 0) { if (pFont->IsVertWriting()) m_pCurStates->m_TextPos.y -= GetVerticalTextSize(fInitKerning); else m_pCurStates->m_TextPos.x -= GetHorizontalTextSize(fInitKerning); } if (nSegs == 0) return; const TextRenderingMode text_mode = pFont->IsType3Font() ? TextRenderingMode::MODE_FILL : m_pCurStates->m_TextState.GetTextMode(); { auto pText = pdfium::MakeUnique(GetCurrentStreamIndex()); m_pLastTextObject = pText.get(); SetGraphicStates(m_pLastTextObject.Get(), true, true, true); if (TextRenderingModeIsStrokeMode(text_mode)) { float* pCTM = pText->m_TextState.GetMutableCTM(); pCTM[0] = m_pCurStates->m_CTM.a; pCTM[1] = m_pCurStates->m_CTM.c; pCTM[2] = m_pCurStates->m_CTM.b; pCTM[3] = m_pCurStates->m_CTM.d; } pText->SetSegments(pStrs, kernings, nSegs); pText->SetPosition( m_mtContentToUser.Transform(m_pCurStates->m_CTM.Transform( m_pCurStates->m_TextMatrix.Transform(CFX_PointF( m_pCurStates->m_TextPos.x, m_pCurStates->m_TextPos.y + m_pCurStates->m_TextRise))))); m_pCurStates->m_TextPos += pText->CalcPositionData(m_pCurStates->m_TextHorzScale); if (TextRenderingModeIsClipMode(text_mode)) { m_ClipTextList.push_back( std::unique_ptr(pText->Clone())); } m_pObjectHolder->AppendPageObject(std::move(pText)); } if (!kernings.empty() && kernings[nSegs - 1] != 0) { if (pFont->IsVertWriting()) m_pCurStates->m_TextPos.y -= GetVerticalTextSize(kernings[nSegs - 1]); else m_pCurStates->m_TextPos.x -= GetHorizontalTextSize(kernings[nSegs - 1]); } } float CPDF_StreamContentParser::GetHorizontalTextSize(float fKerning) const { return GetVerticalTextSize(fKerning) * m_pCurStates->m_TextHorzScale; } float CPDF_StreamContentParser::GetVerticalTextSize(float fKerning) const { return fKerning * m_pCurStates->m_TextState.GetFontSize() / 1000; } int32_t CPDF_StreamContentParser::GetCurrentStreamIndex() { auto it = std::upper_bound(m_StreamStartOffsets.begin(), m_StreamStartOffsets.end(), m_pSyntax->GetPos() + m_StartParseOffset); return (it - m_StreamStartOffsets.begin()) - 1; } void CPDF_StreamContentParser::Handle_ShowText() { ByteString str = GetString(0); if (!str.IsEmpty()) AddTextObject(&str, 0, std::vector(), 1); } void CPDF_StreamContentParser::Handle_ShowText_Positioning() { CPDF_Array* pArray = ToArray(GetObject(0)); if (!pArray) return; size_t n = pArray->size(); size_t nsegs = 0; for (size_t i = 0; i < n; i++) { const CPDF_Object* pDirectObject = pArray->GetDirectObjectAt(i); if (pDirectObject && pDirectObject->IsString()) nsegs++; } if (nsegs == 0) { for (size_t i = 0; i < n; i++) { float fKerning = pArray->GetNumberAt(i); if (fKerning != 0) m_pCurStates->m_TextPos.x -= GetHorizontalTextSize(fKerning); } return; } std::vector strs(nsegs); std::vector kernings(nsegs); size_t iSegment = 0; float fInitKerning = 0; for (size_t i = 0; i < n; i++) { CPDF_Object* pObj = pArray->GetDirectObjectAt(i); if (!pObj) continue; if (pObj->IsString()) { ByteString str = pObj->GetString(); if (str.IsEmpty()) continue; strs[iSegment] = std::move(str); kernings[iSegment++] = 0; } else { float num = pObj->GetNumber(); if (iSegment == 0) fInitKerning += num; else kernings[iSegment - 1] += num; } } AddTextObject(strs.data(), fInitKerning, kernings, iSegment); } void CPDF_StreamContentParser::Handle_SetTextLeading() { m_pCurStates->m_TextLeading = GetNumber(0); } void CPDF_StreamContentParser::Handle_SetTextMatrix() { m_pCurStates->m_TextMatrix = CFX_Matrix(GetNumber(5), GetNumber(4), GetNumber(3), GetNumber(2), GetNumber(1), GetNumber(0)); OnChangeTextMatrix(); m_pCurStates->m_TextPos = CFX_PointF(); m_pCurStates->m_TextLinePos = CFX_PointF(); } void CPDF_StreamContentParser::OnChangeTextMatrix() { CFX_Matrix text_matrix(m_pCurStates->m_TextHorzScale, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f); text_matrix.Concat(m_pCurStates->m_TextMatrix); text_matrix.Concat(m_pCurStates->m_CTM); text_matrix.Concat(m_mtContentToUser); float* pTextMatrix = m_pCurStates->m_TextState.GetMutableMatrix(); pTextMatrix[0] = text_matrix.a; pTextMatrix[1] = text_matrix.c; pTextMatrix[2] = text_matrix.b; pTextMatrix[3] = text_matrix.d; } void CPDF_StreamContentParser::Handle_SetTextRenderMode() { TextRenderingMode mode; if (SetTextRenderingModeFromInt(GetInteger(0), &mode)) m_pCurStates->m_TextState.SetTextMode(mode); } void CPDF_StreamContentParser::Handle_SetTextRise() { m_pCurStates->m_TextRise = GetNumber(0); } void CPDF_StreamContentParser::Handle_SetWordSpace() { m_pCurStates->m_TextState.SetWordSpace(GetNumber(0)); } void CPDF_StreamContentParser::Handle_SetHorzScale() { if (m_ParamCount != 1) { return; } m_pCurStates->m_TextHorzScale = GetNumber(0) / 100; OnChangeTextMatrix(); } void CPDF_StreamContentParser::Handle_MoveToNextLine() { m_pCurStates->m_TextLinePos.y -= m_pCurStates->m_TextLeading; m_pCurStates->m_TextPos = m_pCurStates->m_TextLinePos; } void CPDF_StreamContentParser::Handle_CurveTo_23() { AddPathPoint(m_PathCurrentX, m_PathCurrentY, FXPT_TYPE::BezierTo, false); AddPathPoint(GetNumber(3), GetNumber(2), FXPT_TYPE::BezierTo, false); AddPathPoint(GetNumber(1), GetNumber(0), FXPT_TYPE::BezierTo, false); } void CPDF_StreamContentParser::Handle_SetLineWidth() { m_pCurStates->m_GraphState.SetLineWidth(GetNumber(0)); } void CPDF_StreamContentParser::Handle_Clip() { m_PathClipType = FXFILL_WINDING; } void CPDF_StreamContentParser::Handle_EOClip() { m_PathClipType = FXFILL_ALTERNATE; } void CPDF_StreamContentParser::Handle_CurveTo_13() { AddPathPoint(GetNumber(3), GetNumber(2), FXPT_TYPE::BezierTo, false); AddPathPoint(GetNumber(1), GetNumber(0), FXPT_TYPE::BezierTo, false); AddPathPoint(GetNumber(1), GetNumber(0), FXPT_TYPE::BezierTo, false); } void CPDF_StreamContentParser::Handle_NextLineShowText() { Handle_MoveToNextLine(); Handle_ShowText(); } void CPDF_StreamContentParser::Handle_NextLineShowText_Space() { m_pCurStates->m_TextState.SetWordSpace(GetNumber(2)); m_pCurStates->m_TextState.SetCharSpace(GetNumber(1)); Handle_NextLineShowText(); } void CPDF_StreamContentParser::Handle_Invalid() {} void CPDF_StreamContentParser::AddPathPoint(float x, float y, FXPT_TYPE type, bool close) { // If the path point is the same move as the previous one and neither of them // closes the path, then just skip it. if (!close && type == FXPT_TYPE::MoveTo && !m_PathPoints.empty() && !m_PathPoints.back().m_CloseFigure && m_PathPoints.back().m_Type == type && m_PathCurrentX == x && m_PathCurrentY == y) { return; } m_PathCurrentX = x; m_PathCurrentY = y; if (type == FXPT_TYPE::MoveTo && !close) { m_PathStartX = x; m_PathStartY = y; if (!m_PathPoints.empty() && m_PathPoints.back().IsTypeAndOpen(FXPT_TYPE::MoveTo)) { m_PathPoints.back().m_Point = CFX_PointF(x, y); return; } } else if (m_PathPoints.empty()) { return; } m_PathPoints.push_back(FX_PATHPOINT(CFX_PointF(x, y), type, close)); } void CPDF_StreamContentParser::AddPathObject(int FillType, bool bStroke) { std::vector PathPoints; PathPoints.swap(m_PathPoints); uint8_t PathClipType = m_PathClipType; m_PathClipType = 0; if (PathPoints.empty()) return; if (PathPoints.size() == 1) { if (PathClipType) { CPDF_Path path; path.AppendRect(0, 0, 0, 0); m_pCurStates->m_ClipPath.AppendPath(path, FXFILL_WINDING, true); } return; } if (PathPoints.back().IsTypeAndOpen(FXPT_TYPE::MoveTo)) PathPoints.pop_back(); CPDF_Path Path; for (const auto& point : PathPoints) Path.AppendPoint(point.m_Point, point.m_Type, point.m_CloseFigure); CFX_Matrix matrix = m_pCurStates->m_CTM * m_mtContentToUser; if (bStroke || FillType) { auto pPathObj = pdfium::MakeUnique(GetCurrentStreamIndex()); pPathObj->set_stroke(bStroke); pPathObj->set_filltype(FillType); pPathObj->path() = Path; pPathObj->set_matrix(matrix); SetGraphicStates(pPathObj.get(), true, false, true); pPathObj->CalcBoundingBox(); m_pObjectHolder->AppendPageObject(std::move(pPathObj)); } if (PathClipType) { if (!matrix.IsIdentity()) Path.Transform(matrix); m_pCurStates->m_ClipPath.AppendPath(Path, PathClipType, true); } } uint32_t CPDF_StreamContentParser::Parse( const uint8_t* pData, uint32_t dwSize, uint32_t start_offset, uint32_t max_cost, const std::vector& stream_start_offsets) { ASSERT(start_offset < dwSize); // Parsing will be done from |pDataStart|, for at most |size_left| bytes. const uint8_t* pDataStart = pData + start_offset; uint32_t size_left = dwSize - start_offset; m_StartParseOffset = start_offset; if (m_ParsedSet->size() > kMaxFormLevel || pdfium::ContainsKey(*m_ParsedSet, pDataStart)) { return size_left; } m_StreamStartOffsets = stream_start_offsets; pdfium::ScopedSetInsertion scopedInsert(m_ParsedSet.Get(), pDataStart); uint32_t init_obj_count = m_pObjectHolder->GetPageObjectCount(); CPDF_StreamParser syntax(pdfium::make_span(pDataStart, size_left), m_pDocument->GetByteStringPool()); CPDF_StreamParserAutoClearer auto_clearer(&m_pSyntax, &syntax); while (1) { uint32_t cost = m_pObjectHolder->GetPageObjectCount() - init_obj_count; if (max_cost && cost >= max_cost) { break; } switch (syntax.ParseNextElement()) { case CPDF_StreamParser::EndOfData: return m_pSyntax->GetPos(); case CPDF_StreamParser::Keyword: OnOperator(syntax.GetWord()); ClearAllParams(); break; case CPDF_StreamParser::Number: AddNumberParam(syntax.GetWord()); break; case CPDF_StreamParser::Name: { auto word = syntax.GetWord(); AddNameParam(word.Last(word.GetLength() - 1)); break; } default: AddObjectParam(syntax.GetObject()); } } return m_pSyntax->GetPos(); } void CPDF_StreamContentParser::ParsePathObject() { float params[6] = {}; int nParams = 0; int last_pos = m_pSyntax->GetPos(); while (1) { CPDF_StreamParser::SyntaxType type = m_pSyntax->ParseNextElement(); bool bProcessed = true; switch (type) { case CPDF_StreamParser::EndOfData: return; case CPDF_StreamParser::Keyword: { ByteStringView strc = m_pSyntax->GetWord(); int len = strc.GetLength(); if (len == 1) { switch (strc[0]) { case kPathOperatorSubpath: AddPathPoint(params[0], params[1], FXPT_TYPE::MoveTo, false); nParams = 0; break; case kPathOperatorLine: AddPathPoint(params[0], params[1], FXPT_TYPE::LineTo, false); nParams = 0; break; case kPathOperatorCubicBezier1: AddPathPoint(params[0], params[1], FXPT_TYPE::BezierTo, false); AddPathPoint(params[2], params[3], FXPT_TYPE::BezierTo, false); AddPathPoint(params[4], params[5], FXPT_TYPE::BezierTo, false); nParams = 0; break; case kPathOperatorCubicBezier2: AddPathPoint(m_PathCurrentX, m_PathCurrentY, FXPT_TYPE::BezierTo, false); AddPathPoint(params[0], params[1], FXPT_TYPE::BezierTo, false); AddPathPoint(params[2], params[3], FXPT_TYPE::BezierTo, false); nParams = 0; break; case kPathOperatorCubicBezier3: AddPathPoint(params[0], params[1], FXPT_TYPE::BezierTo, false); AddPathPoint(params[2], params[3], FXPT_TYPE::BezierTo, false); AddPathPoint(params[2], params[3], FXPT_TYPE::BezierTo, false); nParams = 0; break; case kPathOperatorClosePath: Handle_ClosePath(); nParams = 0; break; default: bProcessed = false; break; } } else if (len == 2) { if (strc[0] == kPathOperatorRectangle[0] && strc[1] == kPathOperatorRectangle[1]) { 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_Number number(m_pSyntax->GetWord()); params[nParams++] = number.GetFloat(); break; } default: bProcessed = false; } if (!bProcessed) { m_pSyntax->SetPos(last_pos); return; } } } // static ByteStringView CPDF_StreamContentParser::FindKeyAbbreviationForTesting( ByteStringView abbr) { return FindFullName(kInlineKeyAbbr, FX_ArraySize(kInlineKeyAbbr), abbr); } // static ByteStringView CPDF_StreamContentParser::FindValueAbbreviationForTesting( ByteStringView abbr) { return FindFullName(kInlineValueAbbr, FX_ArraySize(kInlineValueAbbr), abbr); } CPDF_StreamContentParser::ContentParam::ContentParam() {} CPDF_StreamContentParser::ContentParam::~ContentParam() {}