1// Copyright 2014 PDFium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7#include "../../../include/fpdfapi/fpdf_page.h" 8#include "../../../include/fpdfapi/fpdf_serial.h" 9#include "../../../include/fpdfapi/fpdf_module.h" 10#include "../../../include/fxcodec/fx_codec.h" 11#include "../fpdf_page/pageint.h" 12CFX_ByteTextBuf& operator << (CFX_ByteTextBuf& ar, CFX_AffineMatrix& matrix) 13{ 14 ar << matrix.a << " " << matrix.b << " " << matrix.c << " " << matrix.d << " " << matrix.e << " " << matrix.f; 15 return ar; 16} 17CPDF_PageContentGenerate::CPDF_PageContentGenerate(CPDF_Page* pPage) : m_pPage(pPage) 18{ 19 m_pDocument = NULL; 20 if (m_pPage) { 21 m_pDocument = m_pPage->m_pDocument; 22 } 23 FX_POSITION pos = pPage->GetFirstObjectPosition(); 24 while (pos) { 25 InsertPageObject(pPage->GetNextObject(pos)); 26 } 27} 28CPDF_PageContentGenerate::~CPDF_PageContentGenerate() 29{ 30} 31FX_BOOL CPDF_PageContentGenerate::InsertPageObject(CPDF_PageObject* pPageObject) 32{ 33 if (!pPageObject) { 34 return FALSE; 35 } 36 return m_pageObjects.Add(pPageObject); 37} 38void CPDF_PageContentGenerate::GenerateContent() 39{ 40 CFX_ByteTextBuf buf; 41 CPDF_Dictionary* pPageDict = m_pPage->m_pFormDict; 42 for (int i = 0; i < m_pageObjects.GetSize(); ++i) { 43 CPDF_PageObject* pPageObj = (CPDF_PageObject*)m_pageObjects[i]; 44 if (!pPageObj || pPageObj->m_Type != PDFPAGE_IMAGE) { 45 continue; 46 } 47 ProcessImage(buf, (CPDF_ImageObject*)pPageObj); 48 } 49 CPDF_Object* pContent = pPageDict ? pPageDict->GetElementValue("Contents") : NULL; 50 if (pContent != NULL) { 51 pPageDict->RemoveAt("Contents"); 52 } 53 CPDF_Stream* pStream = new CPDF_Stream(NULL, 0, NULL); 54 pStream->SetData(buf.GetBuffer(), buf.GetLength(), FALSE, FALSE); 55 m_pDocument->AddIndirectObject(pStream); 56 pPageDict->SetAtReference("Contents", m_pDocument, pStream->GetObjNum()); 57} 58CFX_ByteString CPDF_PageContentGenerate::RealizeResource(CPDF_Object* pResourceObj, const FX_CHAR* szType) 59{ 60 if (m_pPage->m_pResources == NULL) { 61 m_pPage->m_pResources = new CPDF_Dictionary; 62 int objnum = m_pDocument->AddIndirectObject(m_pPage->m_pResources); 63 m_pPage->m_pFormDict->SetAtReference("Resources", m_pDocument, objnum); 64 } 65 CPDF_Dictionary* pResList = m_pPage->m_pResources->GetDict(szType); 66 if (pResList == NULL) { 67 pResList = new CPDF_Dictionary; 68 m_pPage->m_pResources->SetAt(szType, pResList); 69 } 70 m_pDocument->AddIndirectObject(pResourceObj); 71 CFX_ByteString name; 72 int idnum = 1; 73 while (1) { 74 name.Format("FX%c%d", szType[0], idnum); 75 if (!pResList->KeyExist(name)) { 76 break; 77 } 78 idnum ++; 79 } 80 pResList->AddReference(name, m_pDocument, pResourceObj->GetObjNum()); 81 return name; 82} 83void CPDF_PageContentGenerate::ProcessImage(CFX_ByteTextBuf& buf, CPDF_ImageObject* pImageObj) 84{ 85 if ((pImageObj->m_Matrix.a == 0 && pImageObj->m_Matrix.b == 0) || 86 (pImageObj->m_Matrix.c == 0 && pImageObj->m_Matrix.d == 0)) { 87 return; 88 } 89 buf << "q " << pImageObj->m_Matrix << " cm "; 90 if (!pImageObj->m_pImage->IsInline()) { 91 CPDF_Stream* pStream = pImageObj->m_pImage->GetStream(); 92 FX_DWORD dwSavedObjNum = pStream->GetObjNum(); 93 CFX_ByteString name = RealizeResource(pStream, "XObject"); 94 if (dwSavedObjNum == 0) { 95 if (pImageObj->m_pImage) 96 pImageObj->m_pImage->Release(); 97 pImageObj->m_pImage = m_pDocument->GetPageData()->GetImage(pStream); 98 } 99 buf << "/" << PDF_NameEncode(name) << " Do Q\n"; 100 } 101} 102void CPDF_PageContentGenerate::ProcessForm(CFX_ByteTextBuf& buf, FX_LPCBYTE data, FX_DWORD size, CFX_Matrix& matrix) 103{ 104 if (!data || !size) { 105 return; 106 } 107 CPDF_Stream* pStream = new CPDF_Stream(NULL, 0, NULL); 108 CPDF_Dictionary* pFormDict = CPDF_Dictionary::Create(); 109 pFormDict->SetAtName(FX_BSTR("Type"), FX_BSTR("XObject")); 110 pFormDict->SetAtName(FX_BSTR("Subtype"), FX_BSTR("Form")); 111 CFX_FloatRect bbox = m_pPage->GetPageBBox(); 112 matrix.TransformRect(bbox); 113 pFormDict->SetAtRect(FX_BSTR("BBox"), bbox); 114 pStream->InitStream((FX_LPBYTE)data, size, pFormDict); 115 buf << "q " << matrix << " cm "; 116 CFX_ByteString name = RealizeResource(pStream, "XObject"); 117 buf << "/" << PDF_NameEncode(name) << " Do Q\n"; 118} 119void CPDF_PageContentGenerate::TransformContent(CFX_Matrix& matrix) 120{ 121 CPDF_Dictionary* pDict = m_pPage->m_pFormDict; 122 CPDF_Object* pContent = pDict ? pDict->GetElementValue("Contents") : NULL; 123 if (!pContent) { 124 return; 125 } 126 CFX_ByteTextBuf buf; 127 int type = pContent->GetType(); 128 if (type == PDFOBJ_ARRAY) { 129 CPDF_Array* pArray = (CPDF_Array*)pContent; 130 int iCount = pArray->GetCount(); 131 CPDF_StreamAcc** pContentArray = (CPDF_StreamAcc**)FX_Alloc(CPDF_StreamAcc*, iCount); 132 int size = 0; 133 int i = 0; 134 for (i = 0; i < iCount; ++i) { 135 pContent = pArray->GetElement(i); 136 if (!pContent || pContent->GetType() != PDFOBJ_STREAM) { 137 continue; 138 } 139 CPDF_StreamAcc* pStream = new CPDF_StreamAcc(); 140 pStream->LoadAllData((CPDF_Stream*)pContent); 141 pContentArray[i] = pStream; 142 size += pContentArray[i]->GetSize() + 1; 143 } 144 int pos = 0; 145 FX_LPBYTE pBuf = FX_Alloc(FX_BYTE, size); 146 for (i = 0; i < iCount; ++i) { 147 FXSYS_memcpy32(pBuf + pos, pContentArray[i]->GetData(), pContentArray[i]->GetSize()); 148 pos += pContentArray[i]->GetSize() + 1; 149 pBuf[pos - 1] = ' '; 150 delete pContentArray[i]; 151 } 152 ProcessForm(buf, pBuf, size, matrix); 153 FX_Free(pBuf); 154 FX_Free(pContentArray); 155 } else if (type == PDFOBJ_STREAM) { 156 CPDF_StreamAcc contentStream; 157 contentStream.LoadAllData((CPDF_Stream*)pContent); 158 ProcessForm(buf, contentStream.GetData(), contentStream.GetSize(), matrix); 159 } 160 CPDF_Stream* pStream = new CPDF_Stream(NULL, 0, NULL); 161 pStream->SetData(buf.GetBuffer(), buf.GetLength(), FALSE, FALSE); 162 m_pDocument->AddIndirectObject(pStream); 163 m_pPage->m_pFormDict->SetAtReference("Contents", m_pDocument, pStream->GetObjNum()); 164} 165