FPDF_EXPORT void FPDF_CALLCONV FPDFPage_InsertClipPath(FPDF_PAGE page,
FPDF_CLIPPATH clipPath) {
CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
if (!pPage)
return;
CPDF_Dictionary* pPageDict = pPage->GetDict();
CPDF_Object* pContentObj = GetPageContent(pPageDict);
if (!pContentObj)
return;
std::ostringstream strClip;
CPDF_ClipPath* pClipPath = CPDFClipPathFromFPDFClipPath(clipPath);
for (size_t i = 0; i < pClipPath->GetPathCount(); ++i) {
CPDF_Path path = pClipPath->GetPath(i);
if (path.GetPoints().empty()) {
// Empty clipping (totally clipped out)
strClip << "0 0 m W n ";
} else {
OutputPath(strClip, path);
if (pClipPath->GetClipType(i) == FXFILL_WINDING)
strClip << "W n\n";
else
strClip << "W* n\n";
}
}
CPDF_Document* pDoc = pPage->GetDocument();
if (!pDoc)
return;
CPDF_Stream* pStream =
pDoc->NewIndirect<CPDF_Stream>(nullptr, 0, pDoc->New<CPDF_Dictionary>());
pStream->SetDataFromStringstream(&strClip);
if (CPDF_Array* pArray = ToArray(pContentObj)) {
pArray->InsertAt(0, pStream->MakeReference(pDoc));
} else if (pContentObj->IsStream() && !pContentObj->IsInline()) {
CPDF_Array* pContentArray = pDoc->NewIndirect<CPDF_Array>();
pContentArray->Add(pStream->MakeReference(pDoc));
pContentArray->Add(pContentObj->MakeReference(pDoc));
pPageDict->SetFor(pdfium::page_object::kContents,
pContentArray->MakeReference(pDoc));
}
}
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());
}
}
