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->GetObjectFor("Contents") : nullptr;
  if (!pContentObj)
    pContentObj = pPageDic ? pPageDic->GetArrayFor("Contents") : nullptr;
  if (!pContentObj)
    return;

  CFX_ByteTextBuf strClip;
  CPDF_ClipPath* pClipPath = (CPDF_ClipPath*)clipPath;
  uint32_t i;
  for (i = 0; i < pClipPath->GetPathCount(); i++) {
    CPDF_Path path = pClipPath->GetPath(i);
    int iClipType = pClipPath->GetClipType(i);
    if (path.GetPoints().empty()) {
      // 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_Document* pDoc = pPage->m_pDocument;
  if (!pDoc)
    return;

  CPDF_Stream* pStream = pDoc->NewIndirect<CPDF_Stream>(
      nullptr, 0,
      pdfium::MakeUnique<CPDF_Dictionary>(pDoc->GetByteStringPool()));
  pStream->SetData(strClip.GetBuffer(), strClip.GetSize());

  CPDF_Array* pArray = ToArray(pContentObj);
  if (pArray) {
    pArray->InsertNewAt<CPDF_Reference>(0, pDoc, pStream->GetObjNum());
    return;
  }
  CPDF_Reference* pReference = ToReference(pContentObj);
  if (!pReference)
    return;

  CPDF_Object* pDirectObj = pReference->GetDirect();
  if (!pDirectObj)
    return;

  CPDF_Array* pObjArray = pDirectObj->AsArray();
  if (pObjArray) {
    pObjArray->InsertNewAt<CPDF_Reference>(0, pDoc, pStream->GetObjNum());
    return;
  }
  if (pDirectObj->IsStream()) {
    CPDF_Array* pContentArray = pDoc->NewIndirect<CPDF_Array>();
    pContentArray->AddNew<CPDF_Reference>(pDoc, pStream->GetObjNum());
    pContentArray->AddNew<CPDF_Reference>(pDoc, pDirectObj->GetObjNum());
    pPageDic->SetNewFor<CPDF_Reference>("Contents", pDoc,
                                        pContentArray->GetObjNum());
  }
}
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->GetObjectFor("Contents") : nullptr;
  if (!pContentObj)
    pContentObj = pPageDic ? pPageDic->GetArrayFor("Contents") : nullptr;
  if (!pContentObj)
    return false;

  CPDF_Document* pDoc = pPage->m_pDocument;
  if (!pDoc)
    return false;

  CPDF_Stream* pStream = pDoc->NewIndirect<CPDF_Stream>(
      nullptr, 0,
      pdfium::MakeUnique<CPDF_Dictionary>(pDoc->GetByteStringPool()));
  pStream->SetData(textBuf.GetBuffer(), textBuf.GetSize());

  CPDF_Stream* pEndStream = pDoc->NewIndirect<CPDF_Stream>(
      nullptr, 0,
      pdfium::MakeUnique<CPDF_Dictionary>(pDoc->GetByteStringPool()));
  pEndStream->SetData((const uint8_t*)" Q", 2);

  CPDF_Array* pContentArray = nullptr;
  CPDF_Array* pArray = ToArray(pContentObj);
  if (pArray) {
    pContentArray = pArray;
    pContentArray->InsertNewAt<CPDF_Reference>(0, pDoc, pStream->GetObjNum());
    pContentArray->AddNew<CPDF_Reference>(pDoc, pEndStream->GetObjNum());
  } else if (CPDF_Reference* pReference = ToReference(pContentObj)) {
    CPDF_Object* pDirectObj = pReference->GetDirect();
    if (pDirectObj) {
      CPDF_Array* pObjArray = pDirectObj->AsArray();
      if (pObjArray) {
        pContentArray = pObjArray;
        pContentArray->InsertNewAt<CPDF_Reference>(0, pDoc,
                                                   pStream->GetObjNum());
        pContentArray->AddNew<CPDF_Reference>(pDoc, pEndStream->GetObjNum());
      } else if (pDirectObj->IsStream()) {
        pContentArray = pDoc->NewIndirect<CPDF_Array>();
        pContentArray->AddNew<CPDF_Reference>(pDoc, pStream->GetObjNum());
        pContentArray->AddNew<CPDF_Reference>(pDoc, pDirectObj->GetObjNum());
        pContentArray->AddNew<CPDF_Reference>(pDoc, pEndStream->GetObjNum());
        pPageDic->SetNewFor<CPDF_Reference>("Contents", pDoc,
                                            pContentArray->GetObjNum());
      }
    }
  }

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

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

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

  return true;
}
Example #3
0
DLLEXPORT int STDCALL FPDFPage_Flatten(FPDF_PAGE page, int nFlag) {
  CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
  if (!page) {
    return FLATTEN_FAIL;
  }

  CPDF_Document* pDocument = pPage->m_pDocument;
  CPDF_Dictionary* pPageDict = pPage->m_pFormDict;

  if (!pDocument || !pPageDict) {
    return FLATTEN_FAIL;
  }

  CPDF_ObjectArray ObjectArray;
  CPDF_RectArray RectArray;

  int iRet = FLATTEN_FAIL;
  iRet = ParserAnnots(pDocument, pPageDict, &RectArray, &ObjectArray, nFlag);
  if (iRet == FLATTEN_NOTHINGTODO || iRet == FLATTEN_FAIL)
    return iRet;

  CFX_FloatRect rcOriginalCB;
  CFX_FloatRect rcMerger = CalculateRect(&RectArray);
  CFX_FloatRect rcOriginalMB = pPageDict->GetRectFor("MediaBox");

  if (pPageDict->KeyExist("CropBox"))
    rcOriginalMB = pPageDict->GetRectFor("CropBox");

  if (rcOriginalMB.IsEmpty()) {
    rcOriginalMB = CFX_FloatRect(0.0f, 0.0f, 612.0f, 792.0f);
  }

  rcMerger.left =
      rcMerger.left < rcOriginalMB.left ? rcOriginalMB.left : rcMerger.left;
  rcMerger.right =
      rcMerger.right > rcOriginalMB.right ? rcOriginalMB.right : rcMerger.right;
  rcMerger.top =
      rcMerger.top > rcOriginalMB.top ? rcOriginalMB.top : rcMerger.top;
  rcMerger.bottom = rcMerger.bottom < rcOriginalMB.bottom ? rcOriginalMB.bottom
                                                          : rcMerger.bottom;

  if (pPageDict->KeyExist("ArtBox"))
    rcOriginalCB = pPageDict->GetRectFor("ArtBox");
  else
    rcOriginalCB = rcOriginalMB;

  if (!rcOriginalMB.IsEmpty()) {
    CPDF_Array* pMediaBox = new CPDF_Array();
    pMediaBox->Add(new CPDF_Number(rcOriginalMB.left));
    pMediaBox->Add(new CPDF_Number(rcOriginalMB.bottom));
    pMediaBox->Add(new CPDF_Number(rcOriginalMB.right));
    pMediaBox->Add(new CPDF_Number(rcOriginalMB.top));
    pPageDict->SetFor("MediaBox", pMediaBox);
  }

  if (!rcOriginalCB.IsEmpty()) {
    CPDF_Array* pCropBox = new CPDF_Array();
    pCropBox->Add(new CPDF_Number(rcOriginalCB.left));
    pCropBox->Add(new CPDF_Number(rcOriginalCB.bottom));
    pCropBox->Add(new CPDF_Number(rcOriginalCB.right));
    pCropBox->Add(new CPDF_Number(rcOriginalCB.top));
    pPageDict->SetFor("ArtBox", pCropBox);
  }

  CPDF_Dictionary* pRes = pPageDict->GetDictFor("Resources");
  if (!pRes) {
    pRes = new CPDF_Dictionary(pDocument->GetByteStringPool());
    pPageDict->SetFor("Resources", pRes);
  }

  CPDF_Stream* pNewXObject = new CPDF_Stream(
      nullptr, 0, new CPDF_Dictionary(pDocument->GetByteStringPool()));

  uint32_t dwObjNum = pDocument->AddIndirectObject(pNewXObject);
  CPDF_Dictionary* pPageXObject = pRes->GetDictFor("XObject");
  if (!pPageXObject) {
    pPageXObject = new CPDF_Dictionary(pDocument->GetByteStringPool());
    pRes->SetFor("XObject", pPageXObject);
  }

  CFX_ByteString key = "";
  int nStreams = ObjectArray.GetSize();

  if (nStreams > 0) {
    for (int iKey = 0; /*iKey < 100*/; iKey++) {
      char sExtend[5] = {};
      FXSYS_itoa(iKey, sExtend, 10);
      key = CFX_ByteString("FFT") + CFX_ByteString(sExtend);
      if (!pPageXObject->KeyExist(key))
        break;
    }
  }

  SetPageContents(key, pPageDict, pDocument);

  CPDF_Dictionary* pNewXORes = nullptr;

  if (!key.IsEmpty()) {
    pPageXObject->SetReferenceFor(key, pDocument, dwObjNum);
    CPDF_Dictionary* pNewOXbjectDic = pNewXObject->GetDict();
    pNewXORes = new CPDF_Dictionary(pDocument->GetByteStringPool());
    pNewOXbjectDic->SetFor("Resources", pNewXORes);
    pNewOXbjectDic->SetNameFor("Type", "XObject");
    pNewOXbjectDic->SetNameFor("Subtype", "Form");
    pNewOXbjectDic->SetIntegerFor("FormType", 1);
    pNewOXbjectDic->SetNameFor("Name", "FRM");
    CFX_FloatRect rcBBox = pPageDict->GetRectFor("ArtBox");
    pNewOXbjectDic->SetRectFor("BBox", rcBBox);
  }

  for (int i = 0; i < nStreams; i++) {
    CPDF_Dictionary* pAnnotDic = ObjectArray.GetAt(i);
    if (!pAnnotDic)
      continue;

    CFX_FloatRect rcAnnot = pAnnotDic->GetRectFor("Rect");
    rcAnnot.Normalize();

    CFX_ByteString sAnnotState = pAnnotDic->GetStringFor("AS");
    CPDF_Dictionary* pAnnotAP = pAnnotDic->GetDictFor("AP");
    if (!pAnnotAP)
      continue;

    CPDF_Stream* pAPStream = pAnnotAP->GetStreamFor("N");
    if (!pAPStream) {
      CPDF_Dictionary* pAPDic = pAnnotAP->GetDictFor("N");
      if (!pAPDic)
        continue;

      if (!sAnnotState.IsEmpty()) {
        pAPStream = pAPDic->GetStreamFor(sAnnotState);
      } else {
        auto it = pAPDic->begin();
        if (it != pAPDic->end()) {
          CPDF_Object* pFirstObj = it->second;
          if (pFirstObj) {
            if (pFirstObj->IsReference())
              pFirstObj = pFirstObj->GetDirect();
            if (!pFirstObj->IsStream())
              continue;
            pAPStream = pFirstObj->AsStream();
          }
        }
      }
    }
    if (!pAPStream)
      continue;

    CPDF_Dictionary* pAPDic = pAPStream->GetDict();
    CFX_Matrix matrix = pAPDic->GetMatrixFor("Matrix");

    CFX_FloatRect rcStream;
    if (pAPDic->KeyExist("Rect"))
      rcStream = pAPDic->GetRectFor("Rect");
    else if (pAPDic->KeyExist("BBox"))
      rcStream = pAPDic->GetRectFor("BBox");

    if (rcStream.IsEmpty())
      continue;

    CPDF_Object* pObj = pAPStream;

    if (pObj) {
      CPDF_Dictionary* pObjDic = pObj->GetDict();
      if (pObjDic) {
        pObjDic->SetNameFor("Type", "XObject");
        pObjDic->SetNameFor("Subtype", "Form");
      }
    }

    CPDF_Dictionary* pXObject = pNewXORes->GetDictFor("XObject");
    if (!pXObject) {
      pXObject = new CPDF_Dictionary(pDocument->GetByteStringPool());
      pNewXORes->SetFor("XObject", pXObject);
    }

    CFX_ByteString sFormName;
    sFormName.Format("F%d", i);
    pXObject->SetReferenceFor(sFormName, pDocument,
                              pDocument->AddIndirectObject(pObj));

    CPDF_StreamAcc acc;
    acc.LoadAllData(pNewXObject);

    const uint8_t* pData = acc.GetData();
    CFX_ByteString sStream(pData, acc.GetSize());

    if (matrix.IsIdentity()) {
      matrix.a = 1.0f;
      matrix.b = 0.0f;
      matrix.c = 0.0f;
      matrix.d = 1.0f;
      matrix.e = 0.0f;
      matrix.f = 0.0f;
    }

    CFX_ByteString sTemp;
    CFX_Matrix m = GetMatrix(rcAnnot, rcStream, matrix);
    sTemp.Format("q %f 0 0 %f %f %f cm /%s Do Q\n", m.a, m.d, m.e, m.f,
                 sFormName.c_str());
    sStream += sTemp;
    pNewXObject->SetData(sStream.raw_str(), sStream.GetLength());
  }
  pPageDict->RemoveFor("Annots");

  ObjectArray.RemoveAll();
  RectArray.RemoveAll();

  return FLATTEN_SUCCESS;
}