| // Copyright 2016 The PDFium Authors |
| // 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 |
| |
| #ifndef CORE_FPDFAPI_PAGE_CPDF_STREAMCONTENTPARSER_H_ |
| #define CORE_FPDFAPI_PAGE_CPDF_STREAMCONTENTPARSER_H_ |
| |
| #include <map> |
| #include <memory> |
| #include <stack> |
| #include <vector> |
| |
| #include "core/fpdfapi/page/cpdf_contentmarks.h" |
| #include "core/fpdfapi/page/cpdf_form.h" |
| #include "core/fxcrt/bytestring.h" |
| #include "core/fxcrt/fx_coordinates.h" |
| #include "core/fxcrt/fx_number.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "core/fxcrt/unowned_ptr.h" |
| #include "core/fxge/cfx_fillrenderoptions.h" |
| #include "core/fxge/cfx_path.h" |
| #include "third_party/base/containers/span.h" |
| |
| class CPDF_AllStates; |
| class CPDF_ColorSpace; |
| class CPDF_Dictionary; |
| class CPDF_Document; |
| class CPDF_Font; |
| class CPDF_Image; |
| class CPDF_ImageObject; |
| class CPDF_Object; |
| class CPDF_PageObject; |
| class CPDF_PageObjectHolder; |
| class CPDF_Pattern; |
| class CPDF_ShadingPattern; |
| class CPDF_Stream; |
| class CPDF_StreamParser; |
| class CPDF_TextObject; |
| |
| class CPDF_StreamContentParser { |
| public: |
| CPDF_StreamContentParser(CPDF_Document* pDoc, |
| RetainPtr<CPDF_Dictionary> pPageResources, |
| RetainPtr<CPDF_Dictionary> pParentResources, |
| const CFX_Matrix* pmtContentToUser, |
| CPDF_PageObjectHolder* pObjHolder, |
| RetainPtr<CPDF_Dictionary> pResources, |
| const CFX_FloatRect& rcBBox, |
| const CPDF_AllStates* pStates, |
| CPDF_Form::RecursionState* parse_state); |
| ~CPDF_StreamContentParser(); |
| |
| uint32_t Parse(pdfium::span<const uint8_t> pData, |
| uint32_t start_offset, |
| uint32_t max_cost, |
| const std::vector<uint32_t>& stream_start_offsets); |
| CPDF_PageObjectHolder* GetPageObjectHolder() const { return m_pObjectHolder; } |
| CPDF_AllStates* GetCurStates() const { return m_pCurStates.get(); } |
| bool IsColored() const { return m_bColored; } |
| pdfium::span<const float> GetType3Data() const { return m_Type3Data; } |
| RetainPtr<CPDF_Font> FindFont(const ByteString& name); |
| |
| static ByteStringView FindKeyAbbreviationForTesting(ByteStringView abbr); |
| static ByteStringView FindValueAbbreviationForTesting(ByteStringView abbr); |
| |
| private: |
| enum class RenderType : bool { kFill = false, kStroke = true }; |
| |
| struct ContentParam { |
| enum class Type : uint8_t { kObject = 0, kNumber, kName }; |
| |
| ContentParam(); |
| ~ContentParam(); |
| |
| Type m_Type = Type::kObject; |
| FX_Number m_Number; |
| ByteString m_Name; |
| RetainPtr<CPDF_Object> m_pObject; |
| }; |
| |
| static constexpr int kParamBufSize = 16; |
| |
| using OpCodes = std::map<uint32_t, void (CPDF_StreamContentParser::*)()>; |
| static OpCodes InitializeOpCodes(); |
| |
| void AddNameParam(ByteStringView bsName); |
| void AddNumberParam(ByteStringView str); |
| void AddObjectParam(RetainPtr<CPDF_Object> pObj); |
| int GetNextParamPos(); |
| void ClearAllParams(); |
| RetainPtr<CPDF_Object> GetObject(uint32_t index); |
| ByteString GetString(uint32_t index) const; |
| float GetNumber(uint32_t index) const; |
| // Calls GetNumber() |count| times and returns the values in reverse order. |
| // e.g. for |count| = 3, returns [GetNumber(2), GetNumber(1), GetNumber(0)]. |
| std::vector<float> GetNumbers(size_t count) const; |
| int GetInteger(uint32_t index) const { |
| return static_cast<int>(GetNumber(index)); |
| } |
| // Makes a point from {GetNumber(index + 1), GetNumber(index)}. |
| CFX_PointF GetPoint(uint32_t index) const; |
| // Makes a matrix from {GetNumber(5), ..., GetNumber(0)}. |
| CFX_Matrix GetMatrix() const; |
| void OnOperator(ByteStringView op); |
| void AddTextObject(const ByteString* pStrs, |
| float fInitKerning, |
| const std::vector<float>& kernings, |
| size_t nSegs); |
| float GetHorizontalTextSize(float fKerning) const; |
| float GetVerticalTextSize(float fKerning) const; |
| |
| void OnChangeTextMatrix(); |
| void ParsePathObject(); |
| void AddPathPoint(const CFX_PointF& point, CFX_Path::Point::Type type); |
| void AddPathPointAndClose(const CFX_PointF& point, |
| CFX_Path::Point::Type type); |
| void AddPathRect(float x, float y, float w, float h); |
| void AddPathObject(CFX_FillRenderOptions::FillType fill_type, |
| RenderType render_type); |
| CPDF_ImageObject* AddImageFromStream(RetainPtr<CPDF_Stream> pStream, |
| const ByteString& name); |
| CPDF_ImageObject* AddImageFromStreamObjNum(uint32_t stream_obj_num, |
| const ByteString& name); |
| CPDF_ImageObject* AddLastImage(); |
| |
| void AddForm(RetainPtr<CPDF_Stream> pStream, const ByteString& name); |
| void SetGraphicStates(CPDF_PageObject* pObj, |
| bool bColor, |
| bool bText, |
| bool bGraph); |
| RetainPtr<CPDF_ColorSpace> FindColorSpace(const ByteString& name); |
| RetainPtr<CPDF_Pattern> FindPattern(const ByteString& name); |
| RetainPtr<CPDF_ShadingPattern> FindShading(const ByteString& name); |
| RetainPtr<CPDF_Dictionary> FindResourceHolder(const ByteString& type); |
| RetainPtr<CPDF_Object> FindResourceObj(const ByteString& type, |
| const ByteString& name); |
| |
| // Takes ownership of |pImageObj|, returns unowned pointer to it. |
| CPDF_ImageObject* AddImageObject(std::unique_ptr<CPDF_ImageObject> pImageObj); |
| |
| std::vector<float> GetColors() const; |
| std::vector<float> GetNamedColors() const; |
| int32_t GetCurrentStreamIndex(); |
| |
| void Handle_CloseFillStrokePath(); |
| void Handle_FillStrokePath(); |
| void Handle_CloseEOFillStrokePath(); |
| void Handle_EOFillStrokePath(); |
| void Handle_BeginMarkedContent_Dictionary(); |
| void Handle_BeginImage(); |
| void Handle_BeginMarkedContent(); |
| void Handle_BeginText(); |
| void Handle_CurveTo_123(); |
| void Handle_ConcatMatrix(); |
| void Handle_SetColorSpace_Fill(); |
| void Handle_SetColorSpace_Stroke(); |
| void Handle_SetDash(); |
| void Handle_SetCharWidth(); |
| void Handle_SetCachedDevice(); |
| void Handle_ExecuteXObject(); |
| void Handle_MarkPlace_Dictionary(); |
| void Handle_EndImage(); |
| void Handle_EndMarkedContent(); |
| void Handle_EndText(); |
| void Handle_FillPath(); |
| void Handle_FillPathOld(); |
| void Handle_EOFillPath(); |
| void Handle_SetGray_Fill(); |
| void Handle_SetGray_Stroke(); |
| void Handle_SetExtendGraphState(); |
| void Handle_ClosePath(); |
| void Handle_SetFlat(); |
| void Handle_BeginImageData(); |
| void Handle_SetLineJoin(); |
| void Handle_SetLineCap(); |
| void Handle_SetCMYKColor_Fill(); |
| void Handle_SetCMYKColor_Stroke(); |
| void Handle_LineTo(); |
| void Handle_MoveTo(); |
| void Handle_SetMiterLimit(); |
| void Handle_MarkPlace(); |
| void Handle_EndPath(); |
| void Handle_SaveGraphState(); |
| void Handle_RestoreGraphState(); |
| void Handle_Rectangle(); |
| void Handle_SetRGBColor_Fill(); |
| void Handle_SetRGBColor_Stroke(); |
| void Handle_SetRenderIntent(); |
| void Handle_CloseStrokePath(); |
| void Handle_StrokePath(); |
| void Handle_SetColor_Fill(); |
| void Handle_SetColor_Stroke(); |
| void Handle_SetColorPS_Fill(); |
| void Handle_SetColorPS_Stroke(); |
| void Handle_ShadeFill(); |
| void Handle_SetCharSpace(); |
| void Handle_MoveTextPoint(); |
| void Handle_MoveTextPoint_SetLeading(); |
| void Handle_SetFont(); |
| void Handle_ShowText(); |
| void Handle_ShowText_Positioning(); |
| void Handle_SetTextLeading(); |
| void Handle_SetTextMatrix(); |
| void Handle_SetTextRenderMode(); |
| void Handle_SetTextRise(); |
| void Handle_SetWordSpace(); |
| void Handle_SetHorzScale(); |
| void Handle_MoveToNextLine(); |
| void Handle_CurveTo_23(); |
| void Handle_SetLineWidth(); |
| void Handle_Clip(); |
| void Handle_EOClip(); |
| void Handle_CurveTo_13(); |
| void Handle_NextLineShowText(); |
| void Handle_NextLineShowText_Space(); |
| void Handle_Invalid(); |
| |
| UnownedPtr<CPDF_Document> const m_pDocument; |
| RetainPtr<CPDF_Dictionary> const m_pPageResources; |
| RetainPtr<CPDF_Dictionary> const m_pParentResources; |
| RetainPtr<CPDF_Dictionary> const m_pResources; |
| UnownedPtr<CPDF_PageObjectHolder> const m_pObjectHolder; |
| UnownedPtr<CPDF_Form::RecursionState> const m_RecursionState; |
| CFX_Matrix m_mtContentToUser; |
| const CFX_FloatRect m_BBox; |
| uint32_t m_ParamStartPos = 0; |
| uint32_t m_ParamCount = 0; |
| std::unique_ptr<CPDF_StreamParser> m_pSyntax; |
| std::unique_ptr<CPDF_AllStates> m_pCurStates; |
| std::stack<std::unique_ptr<CPDF_ContentMarks>> m_ContentMarksStack; |
| std::vector<std::unique_ptr<CPDF_TextObject>> m_ClipTextList; |
| std::vector<CFX_Path::Point> m_PathPoints; |
| CFX_PointF m_PathStart; |
| CFX_PointF m_PathCurrent; |
| CFX_FillRenderOptions::FillType m_PathClipType = |
| CFX_FillRenderOptions::FillType::kNoFill; |
| ByteString m_LastImageName; |
| RetainPtr<CPDF_Image> m_pLastImage; |
| bool m_bColored = false; |
| std::vector<std::unique_ptr<CPDF_AllStates>> m_StateStack; |
| float m_Type3Data[6] = {0.0f}; |
| ContentParam m_ParamBuf[kParamBufSize]; |
| |
| // The merged stream offsets at which a content stream ends and another |
| // begins. |
| std::vector<uint32_t> m_StreamStartOffsets; |
| |
| // The merged stream offset at which the last |m_pSyntax| started parsing. |
| uint32_t m_StartParseOffset = 0; |
| }; |
| |
| #endif // CORE_FPDFAPI_PAGE_CPDF_STREAMCONTENTPARSER_H_ |