CPDF_ShadingPattern::CPDF_ShadingPattern(CPDF_Document* pDoc,
CPDF_Object* pPatternObj,
FX_BOOL bShading,
const CFX_Matrix& parentMatrix)
: CPDF_Pattern(SHADING,
pDoc,
bShading ? nullptr : pPatternObj,
parentMatrix),
m_ShadingType(kInvalidShading),
m_bShadingObj(bShading),
m_pShadingObj(pPatternObj),
m_pCS(nullptr),
m_pCountedCS(nullptr) {
if (!bShading) {
CPDF_Dictionary* pDict = m_pPatternObj->GetDict();
m_Pattern2Form = pDict->GetMatrixBy("Matrix");
m_pShadingObj = pDict->GetDirectObjectBy("Shading");
m_Pattern2Form.Concat(parentMatrix);
}
}
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;
}