Method ApplyStrokeColor

IO/ExportPDF/vtkPDFContextDevice2D.cxx:1581–1597

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//------------------------------------------------------------------------------
void vtkPDFContextDevice2D::ApplyStrokeColor(unsigned char* color, int numComps)
{
  HPDF_Page_SetRGBStroke(this->Impl->Page, static_cast<HPDF_REAL>(color[0] / 255.0),
    static_cast<HPDF_REAL>(color[1] / 255.0), static_cast<HPDF_REAL>(color[2] / 255.0));

  unsigned char alpha = numComps > 3 ? color[3] : 255;
  auto gstateIter = this->Impl->AlphaGStateMap.find(alpha);
  if (gstateIter == this->Impl->AlphaGStateMap.end())
  {
    HPDF_ExtGState gstate = HPDF_CreateExtGState(this->Impl->Document);
    HPDF_ExtGState_SetAlphaFill(gstate, alpha / 255.f);
    auto tmp = this->Impl->AlphaGStateMap.insert(std::make_pair(alpha, gstate));
    gstateIter = tmp.first;
  }
  HPDF_ExtGState alphaState = gstateIter->second;
  HPDF_Page_SetExtGState(this->Impl->Page, alphaState);
}

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void vtkPDFContextDevice2D::ApplyLineWidth(float width)