fpdfsdk/fpdf_transformpage.cpp - platform/external/pdfium - Gitiles

 // 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 "public/fpdf_transformpage.h"

 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_number.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_reference.h"
 #include "core/include/fpdfapi/fpdf_page.h"
 #include "fpdfsdk/include/fsdk_define.h"

 namespace {

 void SetBoundingBox(CPDF_Page* page,
                     const CFX_ByteStringC& key,
                     float left,
                     float bottom,
                     float right,
                     float top) {
   CPDF_Dictionary* pPageDict = page->m_pFormDict;
   CPDF_Array* pBoundingBoxArray = new CPDF_Array;
   pBoundingBoxArray->Add(new CPDF_Number(left));
   pBoundingBoxArray->Add(new CPDF_Number(bottom));
   pBoundingBoxArray->Add(new CPDF_Number(right));
   pBoundingBoxArray->Add(new CPDF_Number(top));
   pPageDict->SetAt(key, pBoundingBoxArray);
 }

 FPDF_BOOL GetBoundingBox(CPDF_Page* page,
                          const CFX_ByteStringC& key,
                          float* left,
                          float* bottom,
                          float* right,
                          float* top) {
   CPDF_Dictionary* pPageDict = page->m_pFormDict;
   CPDF_Array* pArray = pPageDict->GetArrayBy(key);
   if (!pArray)
     return FALSE;

   *left = pArray->GetFloatAt(0);
   *bottom = pArray->GetFloatAt(1);
   *right = pArray->GetFloatAt(2);
   *top = pArray->GetFloatAt(3);
   return TRUE;
 }

 }  // namespace

 DLLEXPORT void STDCALL FPDFPage_SetMediaBox(FPDF_PAGE page,
                                             float left,
                                             float bottom,
                                             float right,
                                             float top) {
   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
   if (!pPage)
     return;

   SetBoundingBox(pPage, "MediaBox", left, bottom, right, top);
 }

 DLLEXPORT void STDCALL FPDFPage_SetCropBox(FPDF_PAGE page,
                                            float left,
                                            float bottom,
                                            float right,
                                            float top) {
   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
   if (!pPage)
     return;

   SetBoundingBox(pPage, "CropBox", left, bottom, right, top);
 }

 DLLEXPORT FPDF_BOOL STDCALL FPDFPage_GetMediaBox(FPDF_PAGE page,
                                                  float* left,
                                                  float* bottom,
                                                  float* right,
                                                  float* top) {
   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
   return pPage && GetBoundingBox(pPage, "MediaBox", left, bottom, right, top);
 }

 DLLEXPORT FPDF_BOOL STDCALL FPDFPage_GetCropBox(FPDF_PAGE page,
                                                 float* left,
                                                 float* bottom,
                                                 float* right,
                                                 float* top) {
   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
   return pPage && GetBoundingBox(pPage, "CropBox", left, bottom, right, top);
 }

 DLLEXPORT FPDF_BOOL STDCALL FPDFPage_TransFormWithClip(FPDF_PAGE page,
                                                        FS_MATRIX* matrix,
                                                        FS_RECTF* clipRect) {
   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
   if (!pPage)
     return FALSE;

   CFX_ByteTextBuf textBuf;
   textBuf << "q ";
   CFX_FloatRect rect(clipRect->left, clipRect->bottom, clipRect->right,
                      clipRect->top);
   rect.Normalize();
   CFX_ByteString bsClipping;
   bsClipping.Format("%f %f %f %f re W* n ", rect.left, rect.bottom,
                     rect.Width(), rect.Height());
   textBuf << bsClipping;

   CFX_ByteString bsMatix;
   bsMatix.Format("%f %f %f %f %f %f cm ", matrix->a, matrix->b, matrix->c,
                  matrix->d, matrix->e, matrix->f);
   textBuf << bsMatix;

   CPDF_Dictionary* pPageDic = pPage->m_pFormDict;
   CPDF_Object* pContentObj =
       pPageDic ? pPageDic->GetElement("Contents") : nullptr;
   if (!pContentObj)
     pContentObj = pPageDic ? pPageDic->GetArrayBy("Contents") : nullptr;
   if (!pContentObj)
     return FALSE;

   CPDF_Dictionary* pDic = new CPDF_Dictionary;
   CPDF_Stream* pStream = new CPDF_Stream(nullptr, 0, pDic);
   pStream->SetData(textBuf.GetBuffer(), textBuf.GetSize(), FALSE, FALSE);
   CPDF_Document* pDoc = pPage->m_pDocument;
   if (!pDoc)
     return FALSE;
   pDoc->AddIndirectObject(pStream);

   pDic = new CPDF_Dictionary;
   CPDF_Stream* pEndStream = new CPDF_Stream(nullptr, 0, pDic);
   pEndStream->SetData((const uint8_t*)" Q", 2, FALSE, FALSE);
   pDoc->AddIndirectObject(pEndStream);

   CPDF_Array* pContentArray = nullptr;
   if (CPDF_Array* pArray = ToArray(pContentObj)) {
     pContentArray = pArray;
     CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum());
     pContentArray->InsertAt(0, pRef);
     pContentArray->AddReference(pDoc, pEndStream);
   } else if (CPDF_Reference* pReference = ToReference(pContentObj)) {
     CPDF_Object* pDirectObj = pReference->GetDirect();
     if (pDirectObj) {
       if (CPDF_Array* pArray = pDirectObj->AsArray()) {
         pContentArray = pArray;
         CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum());
         pContentArray->InsertAt(0, pRef);
         pContentArray->AddReference(pDoc, pEndStream);
       } else if (pDirectObj->IsStream()) {
         pContentArray = new CPDF_Array();
         pContentArray->AddReference(pDoc, pStream->GetObjNum());
         pContentArray->AddReference(pDoc, pDirectObj->GetObjNum());
         pContentArray->AddReference(pDoc, pEndStream);
         pPageDic->SetAtReference("Contents", pDoc,
                                  pDoc->AddIndirectObject(pContentArray));
       }
     }
   }

   // Need to transform the patterns as well.
   CPDF_Dictionary* pRes = pPageDic->GetDictBy("Resources");
   if (pRes) {
     CPDF_Dictionary* pPattenDict = pRes->GetDictBy("Pattern");
     if (pPattenDict) {
       for (const auto& it : *pPattenDict) {
         CPDF_Object* pObj = it.second;
         if (pObj->IsReference())
           pObj = pObj->GetDirect();

         CPDF_Dictionary* pDict = nullptr;
         if (pObj->IsDictionary())
           pDict = pObj->AsDictionary();
         else if (CPDF_Stream* pStream = pObj->AsStream())
           pDict = pStream->GetDict();
         else
           continue;

         CFX_Matrix m = pDict->GetMatrixBy("Matrix");
         CFX_Matrix t = *(CFX_Matrix*)matrix;
         m.Concat(t);
         pDict->SetAtMatrix("Matrix", m);
       }
     }
   }

   return TRUE;
 }

 DLLEXPORT void STDCALL
 FPDFPageObj_TransformClipPath(FPDF_PAGEOBJECT page_object,
                               double a,
                               double b,
                               double c,
                               double d,
                               double e,
                               double f) {
   CPDF_PageObject* pPageObj = (CPDF_PageObject*)page_object;
   if (!pPageObj)
     return;
   CFX_Matrix matrix((FX_FLOAT)a, (FX_FLOAT)b, (FX_FLOAT)c, (FX_FLOAT)d,
                     (FX_FLOAT)e, (FX_FLOAT)f);

   // Special treatment to shading object, because the ClipPath for shading
   // object is already transformed.
   if (!pPageObj->IsShading())
     pPageObj->TransformClipPath(matrix);
   pPageObj->TransformGeneralState(matrix);
 }

 DLLEXPORT FPDF_CLIPPATH STDCALL FPDF_CreateClipPath(float left,
                                                     float bottom,
                                                     float right,
                                                     float top) {
   CPDF_ClipPath* pNewClipPath = new CPDF_ClipPath();
   pNewClipPath->GetModify();
   CPDF_Path Path;
   Path.GetModify();
   Path.AppendRect(left, bottom, right, top);
   pNewClipPath->AppendPath(Path, FXFILL_ALTERNATE, FALSE);
   return pNewClipPath;
 }

 DLLEXPORT void STDCALL FPDF_DestroyClipPath(FPDF_CLIPPATH clipPath) {
   delete (CPDF_ClipPath*)clipPath;
 }

 void OutputPath(CFX_ByteTextBuf& buf, CPDF_Path path) {
   const CFX_PathData* pPathData = path;
   if (!pPathData)
     return;

   FX_PATHPOINT* pPoints = pPathData->GetPoints();

   if (path.IsRect()) {
     buf << (pPoints[0].m_PointX) << " " << (pPoints[0].m_PointY) << " "
         << (pPoints[2].m_PointX - pPoints[0].m_PointX) << " "
         << (pPoints[2].m_PointY - pPoints[0].m_PointY) << " re\n";
     return;
   }

   CFX_ByteString temp;
   for (int i = 0; i < pPathData->GetPointCount(); i++) {
     buf << (pPoints[i].m_PointX) << " " << (pPoints[i].m_PointY);
     int point_type = pPoints[i].m_Flag & FXPT_TYPE;
     if (point_type == FXPT_MOVETO) {
       buf << " m\n";
     } else if (point_type == FXPT_BEZIERTO) {
       buf << " " << (pPoints[i + 1].m_PointX) << " "
           << (pPoints[i + 1].m_PointY) << " " << (pPoints[i + 2].m_PointX)
           << " " << (pPoints[i + 2].m_PointY);
       if (pPoints[i + 2].m_Flag & FXPT_CLOSEFIGURE)
         buf << " c h\n";
       else
         buf << " c\n";
       i += 2;
     } else if (point_type == FXPT_LINETO) {
       if (pPoints[i].m_Flag & FXPT_CLOSEFIGURE)
         buf << " l h\n";
       else
         buf << " l\n";
     }
   }
 }

 DLLEXPORT void STDCALL FPDFPage_InsertClipPath(FPDF_PAGE page,
                                                FPDF_CLIPPATH clipPath) {
   CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
   if (!pPage)
     return;

   CPDF_Dictionary* pPageDic = pPage->m_pFormDict;
   CPDF_Object* pContentObj =
       pPageDic ? pPageDic->GetElement("Contents") : nullptr;
   if (!pContentObj)
     pContentObj = pPageDic ? pPageDic->GetArrayBy("Contents") : nullptr;
   if (!pContentObj)
     return;

   CFX_ByteTextBuf strClip;
   CPDF_ClipPath* pClipPath = (CPDF_ClipPath*)clipPath;
   FX_DWORD i;
   for (i = 0; i < pClipPath->GetPathCount(); i++) {
     CPDF_Path path = pClipPath->GetPath(i);
     int iClipType = pClipPath->GetClipType(i);
     if (path.GetPointCount() == 0) {
       // Empty clipping (totally clipped out)
       strClip << "0 0 m W n ";
     } else {
       OutputPath(strClip, path);
       if (iClipType == FXFILL_WINDING)
         strClip << "W n\n";
       else
         strClip << "W* n\n";
     }
   }
   CPDF_Dictionary* pDic = new CPDF_Dictionary;
   CPDF_Stream* pStream = new CPDF_Stream(nullptr, 0, pDic);
   pStream->SetData(strClip.GetBuffer(), strClip.GetSize(), FALSE, FALSE);
   CPDF_Document* pDoc = pPage->m_pDocument;
   if (!pDoc)
     return;
   pDoc->AddIndirectObject(pStream);

   CPDF_Array* pContentArray = nullptr;
   if (CPDF_Array* pArray = ToArray(pContentObj)) {
     pContentArray = pArray;
     CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum());
     pContentArray->InsertAt(0, pRef);
   } else if (CPDF_Reference* pReference = ToReference(pContentObj)) {
     CPDF_Object* pDirectObj = pReference->GetDirect();
     if (pDirectObj) {
       if (CPDF_Array* pArray = pDirectObj->AsArray()) {
         pContentArray = pArray;
         CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum());
         pContentArray->InsertAt(0, pRef);
       } else if (pDirectObj->IsStream()) {
         pContentArray = new CPDF_Array();
         pContentArray->AddReference(pDoc, pStream->GetObjNum());
         pContentArray->AddReference(pDoc, pDirectObj->GetObjNum());
         pPageDic->SetAtReference("Contents", pDoc,
                                  pDoc->AddIndirectObject(pContentArray));
       }
     }
   }
 }
	// 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 "public/fpdf_transformpage.h"

	#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
	#include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
	#include "core/fpdfapi/fpdf_parser/include/cpdf_number.h"
	#include "core/fpdfapi/fpdf_parser/include/cpdf_reference.h"
	#include "core/include/fpdfapi/fpdf_page.h"
	#include "fpdfsdk/include/fsdk_define.h"

	namespace {

	void SetBoundingBox(CPDF_Page* page,
	const CFX_ByteStringC& key,
	float left,
	float bottom,
	float right,
	float top) {
	CPDF_Dictionary* pPageDict = page->m_pFormDict;
	CPDF_Array* pBoundingBoxArray = new CPDF_Array;
	pBoundingBoxArray->Add(new CPDF_Number(left));
	pBoundingBoxArray->Add(new CPDF_Number(bottom));
	pBoundingBoxArray->Add(new CPDF_Number(right));
	pBoundingBoxArray->Add(new CPDF_Number(top));
	pPageDict->SetAt(key, pBoundingBoxArray);
	}

	FPDF_BOOL GetBoundingBox(CPDF_Page* page,
	const CFX_ByteStringC& key,
	float* left,
	float* bottom,
	float* right,
	float* top) {
	CPDF_Dictionary* pPageDict = page->m_pFormDict;
	CPDF_Array* pArray = pPageDict->GetArrayBy(key);
	if (!pArray)
	return FALSE;

	*left = pArray->GetFloatAt(0);
	*bottom = pArray->GetFloatAt(1);
	*right = pArray->GetFloatAt(2);
	*top = pArray->GetFloatAt(3);
	return TRUE;
	}

	} // namespace

	DLLEXPORT void STDCALL FPDFPage_SetMediaBox(FPDF_PAGE page,
	float left,
	float bottom,
	float right,
	float top) {
	CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
	if (!pPage)
	return;

	SetBoundingBox(pPage, "MediaBox", left, bottom, right, top);
	}

	DLLEXPORT void STDCALL FPDFPage_SetCropBox(FPDF_PAGE page,
	float left,
	float bottom,
	float right,
	float top) {
	CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
	if (!pPage)
	return;

	SetBoundingBox(pPage, "CropBox", left, bottom, right, top);
	}

	DLLEXPORT FPDF_BOOL STDCALL FPDFPage_GetMediaBox(FPDF_PAGE page,
	float* left,
	float* bottom,
	float* right,
	float* top) {
	CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
	return pPage && GetBoundingBox(pPage, "MediaBox", left, bottom, right, top);
	}

	DLLEXPORT FPDF_BOOL STDCALL FPDFPage_GetCropBox(FPDF_PAGE page,
	float* left,
	float* bottom,
	float* right,
	float* top) {
	CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
	return pPage && GetBoundingBox(pPage, "CropBox", left, bottom, right, top);
	}

	DLLEXPORT FPDF_BOOL STDCALL FPDFPage_TransFormWithClip(FPDF_PAGE page,
	FS_MATRIX* matrix,
	FS_RECTF* clipRect) {
	CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
	if (!pPage)
	return FALSE;

	CFX_ByteTextBuf textBuf;
	textBuf << "q ";
	CFX_FloatRect rect(clipRect->left, clipRect->bottom, clipRect->right,
	clipRect->top);
	rect.Normalize();
	CFX_ByteString bsClipping;
	bsClipping.Format("%f %f %f %f re W* n ", rect.left, rect.bottom,
	rect.Width(), rect.Height());
	textBuf << bsClipping;

	CFX_ByteString bsMatix;
	bsMatix.Format("%f %f %f %f %f %f cm ", matrix->a, matrix->b, matrix->c,
	matrix->d, matrix->e, matrix->f);
	textBuf << bsMatix;

	CPDF_Dictionary* pPageDic = pPage->m_pFormDict;
	CPDF_Object* pContentObj =
	pPageDic ? pPageDic->GetElement("Contents") : nullptr;
	if (!pContentObj)
	pContentObj = pPageDic ? pPageDic->GetArrayBy("Contents") : nullptr;
	if (!pContentObj)
	return FALSE;

	CPDF_Dictionary* pDic = new CPDF_Dictionary;
	CPDF_Stream* pStream = new CPDF_Stream(nullptr, 0, pDic);
	pStream->SetData(textBuf.GetBuffer(), textBuf.GetSize(), FALSE, FALSE);
	CPDF_Document* pDoc = pPage->m_pDocument;
	if (!pDoc)
	return FALSE;
	pDoc->AddIndirectObject(pStream);

	pDic = new CPDF_Dictionary;
	CPDF_Stream* pEndStream = new CPDF_Stream(nullptr, 0, pDic);
	pEndStream->SetData((const uint8_t*)" Q", 2, FALSE, FALSE);
	pDoc->AddIndirectObject(pEndStream);

	CPDF_Array* pContentArray = nullptr;
	if (CPDF_Array* pArray = ToArray(pContentObj)) {
	pContentArray = pArray;
	CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum());
	pContentArray->InsertAt(0, pRef);
	pContentArray->AddReference(pDoc, pEndStream);
	} else if (CPDF_Reference* pReference = ToReference(pContentObj)) {
	CPDF_Object* pDirectObj = pReference->GetDirect();
	if (pDirectObj) {
	if (CPDF_Array* pArray = pDirectObj->AsArray()) {
	pContentArray = pArray;
	CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum());
	pContentArray->InsertAt(0, pRef);
	pContentArray->AddReference(pDoc, pEndStream);
	} else if (pDirectObj->IsStream()) {
	pContentArray = new CPDF_Array();
	pContentArray->AddReference(pDoc, pStream->GetObjNum());
	pContentArray->AddReference(pDoc, pDirectObj->GetObjNum());
	pContentArray->AddReference(pDoc, pEndStream);
	pPageDic->SetAtReference("Contents", pDoc,
	pDoc->AddIndirectObject(pContentArray));
	}
	}
	}

	// Need to transform the patterns as well.
	CPDF_Dictionary* pRes = pPageDic->GetDictBy("Resources");
	if (pRes) {
	CPDF_Dictionary* pPattenDict = pRes->GetDictBy("Pattern");
	if (pPattenDict) {
	for (const auto& it : *pPattenDict) {
	CPDF_Object* pObj = it.second;
	if (pObj->IsReference())
	pObj = pObj->GetDirect();

	CPDF_Dictionary* pDict = nullptr;
	if (pObj->IsDictionary())
	pDict = pObj->AsDictionary();
	else if (CPDF_Stream* pStream = pObj->AsStream())
	pDict = pStream->GetDict();
	else
	continue;

	CFX_Matrix m = pDict->GetMatrixBy("Matrix");
	CFX_Matrix t = (CFX_Matrix)matrix;
	m.Concat(t);
	pDict->SetAtMatrix("Matrix", m);
	}
	}
	}

	return TRUE;
	}

	DLLEXPORT void STDCALL
	FPDFPageObj_TransformClipPath(FPDF_PAGEOBJECT page_object,
	double a,
	double b,
	double c,
	double d,
	double e,
	double f) {
	CPDF_PageObject* pPageObj = (CPDF_PageObject*)page_object;
	if (!pPageObj)
	return;
	CFX_Matrix matrix((FX_FLOAT)a, (FX_FLOAT)b, (FX_FLOAT)c, (FX_FLOAT)d,
	(FX_FLOAT)e, (FX_FLOAT)f);

	// Special treatment to shading object, because the ClipPath for shading
	// object is already transformed.
	if (!pPageObj->IsShading())
	pPageObj->TransformClipPath(matrix);
	pPageObj->TransformGeneralState(matrix);
	}

	DLLEXPORT FPDF_CLIPPATH STDCALL FPDF_CreateClipPath(float left,
	float bottom,
	float right,
	float top) {
	CPDF_ClipPath* pNewClipPath = new CPDF_ClipPath();
	pNewClipPath->GetModify();
	CPDF_Path Path;
	Path.GetModify();
	Path.AppendRect(left, bottom, right, top);
	pNewClipPath->AppendPath(Path, FXFILL_ALTERNATE, FALSE);
	return pNewClipPath;
	}

	DLLEXPORT void STDCALL FPDF_DestroyClipPath(FPDF_CLIPPATH clipPath) {
	delete (CPDF_ClipPath*)clipPath;
	}

	void OutputPath(CFX_ByteTextBuf& buf, CPDF_Path path) {
	const CFX_PathData* pPathData = path;
	if (!pPathData)
	return;

	FX_PATHPOINT* pPoints = pPathData->GetPoints();

	if (path.IsRect()) {
	buf << (pPoints[0].m_PointX) << " " << (pPoints[0].m_PointY) << " "
	<< (pPoints[2].m_PointX - pPoints[0].m_PointX) << " "
	<< (pPoints[2].m_PointY - pPoints[0].m_PointY) << " re\n";
	return;
	}

	CFX_ByteString temp;
	for (int i = 0; i < pPathData->GetPointCount(); i++) {
	buf << (pPoints[i].m_PointX) << " " << (pPoints[i].m_PointY);
	int point_type = pPoints[i].m_Flag & FXPT_TYPE;
	if (point_type == FXPT_MOVETO) {
	buf << " m\n";
	} else if (point_type == FXPT_BEZIERTO) {
	buf << " " << (pPoints[i + 1].m_PointX) << " "
	<< (pPoints[i + 1].m_PointY) << " " << (pPoints[i + 2].m_PointX)
	<< " " << (pPoints[i + 2].m_PointY);
	if (pPoints[i + 2].m_Flag & FXPT_CLOSEFIGURE)
	buf << " c h\n";
	else
	buf << " c\n";
	i += 2;
	} else if (point_type == FXPT_LINETO) {
	if (pPoints[i].m_Flag & FXPT_CLOSEFIGURE)
	buf << " l h\n";
	else
	buf << " l\n";
	}
	}
	}

	DLLEXPORT void STDCALL FPDFPage_InsertClipPath(FPDF_PAGE page,
	FPDF_CLIPPATH clipPath) {
	CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
	if (!pPage)
	return;

	CPDF_Dictionary* pPageDic = pPage->m_pFormDict;
	CPDF_Object* pContentObj =
	pPageDic ? pPageDic->GetElement("Contents") : nullptr;
	if (!pContentObj)
	pContentObj = pPageDic ? pPageDic->GetArrayBy("Contents") : nullptr;
	if (!pContentObj)
	return;

	CFX_ByteTextBuf strClip;
	CPDF_ClipPath* pClipPath = (CPDF_ClipPath*)clipPath;
	FX_DWORD i;
	for (i = 0; i < pClipPath->GetPathCount(); i++) {
	CPDF_Path path = pClipPath->GetPath(i);
	int iClipType = pClipPath->GetClipType(i);
	if (path.GetPointCount() == 0) {
	// Empty clipping (totally clipped out)
	strClip << "0 0 m W n ";
	} else {
	OutputPath(strClip, path);
	if (iClipType == FXFILL_WINDING)
	strClip << "W n\n";
	else
	strClip << "W* n\n";
	}
	}
	CPDF_Dictionary* pDic = new CPDF_Dictionary;
	CPDF_Stream* pStream = new CPDF_Stream(nullptr, 0, pDic);
	pStream->SetData(strClip.GetBuffer(), strClip.GetSize(), FALSE, FALSE);
	CPDF_Document* pDoc = pPage->m_pDocument;
	if (!pDoc)
	return;
	pDoc->AddIndirectObject(pStream);

	CPDF_Array* pContentArray = nullptr;
	if (CPDF_Array* pArray = ToArray(pContentObj)) {
	pContentArray = pArray;
	CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum());
	pContentArray->InsertAt(0, pRef);
	} else if (CPDF_Reference* pReference = ToReference(pContentObj)) {
	CPDF_Object* pDirectObj = pReference->GetDirect();
	if (pDirectObj) {
	if (CPDF_Array* pArray = pDirectObj->AsArray()) {
	pContentArray = pArray;
	CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum());
	pContentArray->InsertAt(0, pRef);
	} else if (pDirectObj->IsStream()) {
	pContentArray = new CPDF_Array();
	pContentArray->AddReference(pDoc, pStream->GetObjNum());
	pContentArray->AddReference(pDoc, pDirectObj->GetObjNum());
	pPageDic->SetAtReference("Contents", pDoc,
	pDoc->AddIndirectObject(pContentArray));
	}
	}
	}
	}