Add Watermark From Image - PDFix.net | Making the PDF World Responsive & Accesible

void AddWatermarkFromImage(std::wstring doc_path, std::wstring jpg_path, std::wstring save_path) {
  // get pdfix
  Pdfix* pdfix = GetPdfix();
  if (!pdfix)
    throw std::runtime_error("Pdfix was not initialized!");
  PdfDoc* doc = pdfix->OpenDoc(doc_path.c_str(), L"");
  if (!doc)
    throw std::runtime_error(pdfix->GetError());

  // specify warermark position and properties and apply it
  PdfWatermarkParams params;
  params.page_range.start_page = 0;
  params.page_range.end_page = -1;
  params.page_range.page_range_spec = kAllPages;
  params.order_top = 1;
  params.percentage_vals = 0;
  params.h_align = kAlignmentLeft;
  params.v_align = kAlignmentTop;
  params.h_value = 10;
  params.v_value = 10;
  params.scale = 0.5;
  params.rotation = 0;
  params.opacity = 0.5;
  if (!doc->AddWatermarkFromImage(&params, jpg_path.c_str()))
    throw std::runtime_error(pdfix->GetError());

  doc->Save(save_path.c_str(), kSaveFull); 
  doc->Close();
}

void AddWatermarkFromImage(std::wstring doc_path, std::wstring jpg_path, std::wstring save_path) {

// get pdfix

Pdfix* pdfix = GetPdfix();

if (!pdfix)

throw std::runtime_error("Pdfix was not initialized!");

PdfDoc* doc = pdfix->OpenDoc(doc_path.c_str(), L"");

if (!doc)

throw std::runtime_error(pdfix->GetError());

// specify warermark position and properties and apply it

PdfWatermarkParams params;

params.page_range.start_page = 0;

params.page_range.end_page = -1;

params.page_range.page_range_spec = kAllPages;

params.order_top = 1;

params.percentage_vals = 0;

params.h_align = kAlignmentLeft;

params.v_align = kAlignmentTop;

params.h_value = 10;

params.v_value = 10;

params.scale = 0.5;

params.rotation = 0;

params.opacity = 0.5;

if (!doc->AddWatermarkFromImage(&params, jpg_path.c_str()))

throw std::runtime_error(pdfix->GetError());

doc->Save(save_path.c_str(), kSaveFull);

doc->Close();

}