Method DrawString

IO/ExportPDF/vtkPDFContextDevice2D.cxx:1220–1274

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
void vtkPDFContextDevice2D::DrawString(float* point, const vtkStdString& string)
{
  vtkTextRenderer* tren = vtkTextRenderer::GetInstance();
  if (!tren)
  {
    vtkGenericWarningMacro("vtkTextRenderer unavailable. Link to "
                           "vtkRenderingFreeType to get the default "
                           "implementation.");
    return;
  }

  int backend = tren->DetectBackend(string);

  this->PushGraphicsState();

  if (backend != vtkTextRenderer::MathText)
  {
    vtkNew<vtkMatrix3x3> mat;
    this->GetMatrix(mat);
    TextHelper helper(this->Impl->Document, this->Impl->Page, this->TextProp, string, mat);
    if (!helper.Valid)
    {
      vtkErrorMacro("Error preparing to draw string: " << string);
      this->PopGraphicsState();
      return;
    }

    this->ApplyTextPropertyState();

    helper.DrawText(point);
  }
  else
  {
    vtkNew<vtkPath> path;
    int dpi = this->Renderer->GetRenderWindow()->GetDPI();
    if (!tren->StringToPath(this->TextProp, string, path, dpi, backend))
    {
      vtkErrorMacro("Error generating path for MathText string '" << string << "'.");
      this->PopGraphicsState();
      return;
    }

    this->ApplyTextPropertyState();
    this->DrawPath(path, point[0], point[1]);
    this->FillEvenOdd();

    float bbox[4];
    this->ComputeStringBounds(string, bbox);
    HPDF_Page_SetRGBStroke(this->Impl->Page, 1, 0, 0);
    HPDF_Page_Rectangle(this->Impl->Page, bbox[0], bbox[1] - bbox[3], bbox[2], bbox[3]);
    HPDF_Page_Stroke(this->Impl->Page);
  }

  this->PopGraphicsState();
}

//------------------------------------------------------------------------------
void vtkPDFContextDevice2D::ComputeStringBounds(const vtkStdString& string, float bounds[4])