CPDF_Document::LoadPattern() and friends always have a valid matrix.

core/fpdfapi/fpdf_page/pageint.h

 // 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
 
 #ifndef CORE_FPDFAPI_FPDF_PAGE_PAGEINT_H_
 #define CORE_FPDFAPI_FPDF_PAGE_PAGEINT_H_
 
 #include <map>
@@ skipping 87 matching lines @@
   };
 };
 #define _FPDF_MAX_FORM_LEVEL_ 30
 #define _FPDF_MAX_TYPE3_FORM_LEVEL_ 4
 #define _FPDF_MAX_OBJECT_STACK_SIZE_ 512
 class CPDF_StreamContentParser {
  public:
   CPDF_StreamContentParser(CPDF_Document* pDoc,
                            CPDF_Dictionary* pPageResources,
                            CPDF_Dictionary* pParentResources,
-                           CFX_Matrix* pmtContentToUser,
+                           const CFX_Matrix* pmtContentToUser,
                            CPDF_PageObjectHolder* pObjectHolder,
                            CPDF_Dictionary* pResources,
                            CFX_FloatRect* pBBox,
                            CPDF_AllStates* pAllStates,
                            int level);
   ~CPDF_StreamContentParser();
 
   CPDF_PageObjectHolder* GetPageObjectHolder() const { return m_pObjectHolder; }
   CPDF_AllStates* GetCurStates() const { return m_pCurStates.get(); }
   FX_BOOL IsColored() const { return m_bColored; }
@@ skipping 31 matching lines @@
   void AddDuplicateImage();
   void AddForm(CPDF_Stream* pStream);
   void SetGraphicStates(CPDF_PageObject* pObj,
                         FX_BOOL bColor,
                         FX_BOOL bText,
                         FX_BOOL bGraph);
   void SaveStates(CPDF_AllStates* pState);
   void RestoreStates(CPDF_AllStates* pState);
   CPDF_Font* FindFont(const CFX_ByteString& name);
   CPDF_ColorSpace* FindColorSpace(const CFX_ByteString& name);
-  CPDF_Pattern* FindPattern(const CFX_ByteString& name, FX_BOOL bShading);
+  CPDF_Pattern* FindPattern(const CFX_ByteString& name, bool bShading);
   CPDF_Object* FindResourceObj(const CFX_ByteStringC& type,
                                const CFX_ByteString& name);
 
  protected:
   using OpCodes =
       std::unordered_map<uint32_t, void (CPDF_StreamContentParser::*)()>;
   static OpCodes InitializeOpCodes();
 
   void Handle_CloseFillStrokePath();
   void Handle_FillStrokePath();
@@ skipping 110 matching lines @@
  public:
   enum ParseStatus { Ready, ToBeContinued, Done };
 
   CPDF_ContentParser();
   ~CPDF_ContentParser();
 
   ParseStatus GetStatus() const { return m_Status; }
   void Start(CPDF_Page* pPage);
   void Start(CPDF_Form* pForm,
              CPDF_AllStates* pGraphicStates,
-             CFX_Matrix* pParentMatrix,
+             const CFX_Matrix* pParentMatrix,
              CPDF_Type3Char* pType3Char,
              int level);
   void Continue(IFX_Pause* pPause);
 
  private:
   enum InternalStage {
     STAGE_GETCONTENT = 1,
     STAGE_PARSE,
     STAGE_CHECKCLIP,
   };
@@ skipping 21 matching lines @@
   CPDF_Font* GetFont(CPDF_Dictionary* pFontDict, FX_BOOL findOnly);
   CPDF_Font* GetStandardFont(const CFX_ByteStringC& fontName,
                              CPDF_FontEncoding* pEncoding);
   void ReleaseFont(CPDF_Dictionary* pFontDict);
   CPDF_ColorSpace* GetColorSpace(CPDF_Object* pCSObj,
                                  const CPDF_Dictionary* pResources);
   CPDF_ColorSpace* GetCopiedColorSpace(CPDF_Object* pCSObj);
   void ReleaseColorSpace(CPDF_Object* pColorSpace);
   CPDF_Pattern* GetPattern(CPDF_Object* pPatternObj,
                            FX_BOOL bShading,
-                           const CFX_Matrix* matrix);
+                           const CFX_Matrix& matrix);
   void ReleasePattern(CPDF_Object* pPatternObj);
   CPDF_Image* GetImage(CPDF_Object* pImageStream);
   void ReleaseImage(CPDF_Object* pImageStream);
   CPDF_IccProfile* GetIccProfile(CPDF_Stream* pIccProfileStream);
   void ReleaseIccProfile(CPDF_IccProfile* pIccProfile);
   CPDF_StreamAcc* GetFontFileStreamAcc(CPDF_Stream* pFontStream);
   void ReleaseFontFileStreamAcc(CPDF_Stream* pFontStream,
                                 FX_BOOL bForce = FALSE);
   FX_BOOL IsForceClear() const { return m_bForceClear; }
   CPDF_CountedColorSpace* FindColorSpacePtr(CPDF_Object* pCSObj) const;
@@ skipping 182 matching lines @@
 };
 
 CFX_ByteStringC PDF_FindKeyAbbreviationForTesting(const CFX_ByteStringC& abbr);
 CFX_ByteStringC PDF_FindValueAbbreviationForTesting(
     const CFX_ByteStringC& abbr);
 
 void PDF_ReplaceAbbr(CPDF_Object* pObj);
 bool IsPathOperator(const uint8_t* buf, size_t len);
 
 #endif  // CORE_FPDFAPI_FPDF_PAGE_PAGEINT_H_