| // 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 "../../../include/fpdfapi/fpdf_page.h" |
| #include "../../../include/fpdfapi/fpdf_serial.h" |
| #include "../../../include/fpdfapi/fpdf_module.h" |
| #include "../../../include/fxcodec/fx_codec.h" |
| #include "../fpdf_page/pageint.h" |
| CFX_ByteTextBuf& operator << (CFX_ByteTextBuf& ar, CFX_AffineMatrix& matrix) |
| { |
| ar << matrix.a << " " << matrix.b << " " << matrix.c << " " << matrix.d << " " << matrix.e << " " << matrix.f; |
| return ar; |
| } |
| CPDF_PageContentGenerate::CPDF_PageContentGenerate(CPDF_Page* pPage) : m_pPage(pPage) |
| { |
| m_pDocument = NULL; |
| if (m_pPage) { |
| m_pDocument = m_pPage->m_pDocument; |
| } |
| } |
| CPDF_PageContentGenerate::~CPDF_PageContentGenerate() |
| { |
| for (int i = 0; i < m_pageObjects.GetSize(); ++i) { |
| CPDF_PageObject* pPageObj = (CPDF_PageObject*)m_pageObjects[i]; |
| if (pPageObj) { |
| pPageObj->Release(); |
| } |
| } |
| } |
| FX_BOOL CPDF_PageContentGenerate::InsertPageObject(CPDF_PageObject* pPageObject) |
| { |
| if (!pPageObject) { |
| return FALSE; |
| } |
| return m_pageObjects.Add(pPageObject); |
| } |
| void CPDF_PageContentGenerate::GenerateContent() |
| { |
| CFX_ByteTextBuf buf; |
| CPDF_Dictionary* pPageDict = m_pPage->m_pFormDict; |
| for (int i = 0; i < m_pageObjects.GetSize(); ++i) { |
| CPDF_PageObject* pPageObj = (CPDF_PageObject*)m_pageObjects[i]; |
| if (!pPageObj || pPageObj->m_Type != PDFPAGE_IMAGE) { |
| continue; |
| } |
| ProcessImage(buf, (CPDF_ImageObject*)pPageObj); |
| } |
| CPDF_Object* pContent = pPageDict->GetElementValue("Contents"); |
| if (pContent != NULL) { |
| pPageDict->RemoveAt("Contents"); |
| } |
| CPDF_Stream* pStream = FX_NEW CPDF_Stream(NULL, 0, NULL); |
| pStream->SetData(buf.GetBuffer(), buf.GetLength(), FALSE, FALSE); |
| m_pDocument->AddIndirectObject(pStream); |
| pPageDict->SetAtReference("Contents", m_pDocument, pStream->GetObjNum()); |
| } |
| CFX_ByteString CPDF_PageContentGenerate::RealizeResource(CPDF_Object* pResourceObj, const FX_CHAR* szType) |
| { |
| if (m_pPage->m_pResources == NULL) { |
| m_pPage->m_pResources = FX_NEW CPDF_Dictionary; |
| int objnum = m_pDocument->AddIndirectObject(m_pPage->m_pResources); |
| m_pPage->m_pFormDict->SetAtReference("Resources", m_pDocument, objnum); |
| } |
| CPDF_Dictionary* pResList = m_pPage->m_pResources->GetDict(szType); |
| if (pResList == NULL) { |
| pResList = FX_NEW CPDF_Dictionary; |
| m_pPage->m_pResources->SetAt(szType, pResList); |
| } |
| m_pDocument->AddIndirectObject(pResourceObj); |
| CFX_ByteString name; |
| int idnum = 1; |
| while (1) { |
| name.Format("FX%c%d", szType[0], idnum); |
| if (!pResList->KeyExist(name)) { |
| break; |
| } |
| idnum ++; |
| } |
| pResList->AddReference(name, m_pDocument, pResourceObj->GetObjNum()); |
| return name; |
| } |
| void CPDF_PageContentGenerate::ProcessImage(CFX_ByteTextBuf& buf, CPDF_ImageObject* pImageObj) |
| { |
| if ((pImageObj->m_Matrix.a == 0 && pImageObj->m_Matrix.b == 0) || |
| (pImageObj->m_Matrix.c == 0 && pImageObj->m_Matrix.d == 0)) { |
| return; |
| } |
| buf << "q " << pImageObj->m_Matrix << " cm "; |
| if (!pImageObj->m_pImage->IsInline()) { |
| CPDF_Stream* pStream = pImageObj->m_pImage->GetStream(); |
| FX_DWORD dwSavedObjNum = pStream->GetObjNum(); |
| CFX_ByteString name = RealizeResource(pStream, "XObject"); |
| if (dwSavedObjNum == 0) { |
| pImageObj->m_pImage->Release(); |
| pImageObj->m_pImage = m_pDocument->GetPageData()->GetImage(pStream); |
| } |
| buf << "/" << PDF_NameEncode(name) << " Do Q\n"; |
| } |
| } |
| void CPDF_PageContentGenerate::ProcessForm(CFX_ByteTextBuf& buf, FX_LPCBYTE data, FX_DWORD size, CFX_Matrix& matrix) |
| { |
| if (!data || !size) { |
| return; |
| } |
| CPDF_Stream* pStream = FX_NEW CPDF_Stream(NULL, 0, NULL); |
| CPDF_Dictionary* pFormDict = CPDF_Dictionary::Create(); |
| pFormDict->SetAtName(FX_BSTR("Type"), FX_BSTR("XObject")); |
| pFormDict->SetAtName(FX_BSTR("Subtype"), FX_BSTR("Form")); |
| CFX_FloatRect bbox = m_pPage->GetPageBBox(); |
| matrix.TransformRect(bbox); |
| pFormDict->SetAtRect(FX_BSTR("BBox"), bbox); |
| pStream->InitStream((FX_LPBYTE)data, size, pFormDict); |
| buf << "q " << matrix << " cm "; |
| CFX_ByteString name = RealizeResource(pStream, "XObject"); |
| buf << "/" << PDF_NameEncode(name) << " Do Q\n"; |
| } |
| void CPDF_PageContentGenerate::TransformContent(CFX_Matrix& matrix) |
| { |
| CPDF_Object* pContent = m_pPage->m_pFormDict->GetElementValue("Contents"); |
| if (!pContent) { |
| return; |
| } |
| CFX_ByteTextBuf buf; |
| int type = pContent->GetType(); |
| if (type == PDFOBJ_ARRAY) { |
| CPDF_Array* pArray = (CPDF_Array*)pContent; |
| int iCount = pArray->GetCount(); |
| CPDF_StreamAcc** pContentArray = (CPDF_StreamAcc**)FX_Alloc(CPDF_StreamAcc*, iCount); |
| int size = 0; |
| int i = 0; |
| for (i = 0; i < iCount; ++i) { |
| pContent = pArray->GetElement(i); |
| if (!pContent || pContent->GetType() != PDFOBJ_STREAM) { |
| continue; |
| } |
| CPDF_StreamAcc* pStream = FX_NEW CPDF_StreamAcc(); |
| pStream->LoadAllData((CPDF_Stream*)pContent); |
| pContentArray[i] = pStream; |
| size += pContentArray[i]->GetSize() + 1; |
| } |
| int pos = 0; |
| FX_LPBYTE pBuf = FX_Alloc(FX_BYTE, size); |
| for (i = 0; i < iCount; ++i) { |
| FXSYS_memcpy32(pBuf + pos, pContentArray[i]->GetData(), pContentArray[i]->GetSize()); |
| pos += pContentArray[i]->GetSize() + 1; |
| pBuf[pos - 1] = ' '; |
| delete pContentArray[i]; |
| } |
| ProcessForm(buf, pBuf, size, matrix); |
| FX_Free(pBuf); |
| FX_Free(pContentArray); |
| } else if (type == PDFOBJ_STREAM) { |
| CPDF_StreamAcc contentStream; |
| contentStream.LoadAllData((CPDF_Stream*)pContent); |
| ProcessForm(buf, contentStream.GetData(), contentStream.GetSize(), matrix); |
| } |
| CPDF_Stream* pStream = FX_NEW CPDF_Stream(NULL, 0, NULL); |
| pStream->SetData(buf.GetBuffer(), buf.GetLength(), FALSE, FALSE); |
| m_pDocument->AddIndirectObject(pStream); |
| m_pPage->m_pFormDict->SetAtReference("Contents", m_pDocument, pStream->GetObjNum()); |
| } |