Method DrawString

IO/Export/vtkSVGContextDevice2D.cxx:1328–1376

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

//------------------------------------------------------------------------------
void vtkSVGContextDevice2D::DrawString(float* point, const vtkStdString& string)
{
  vtkTextRenderer* tren = vtkTextRenderer::GetInstance();
  if (!tren)
  {
    vtkErrorMacro("vtkTextRenderer unavailable. Link to vtkRenderingFreeType "
                  "to get the default implementation.");
    return;
  }

  int backend = this->TextAsPath ? vtkTextRenderer::Default : tren->DetectBackend(string);

  if (backend == vtkTextRenderer::FreeType)
  {
    // Embed freetype text and fonts in the SVG:
    FontInfo& info = this->Impl->GetFontInfo(this->TextProp);
    info.ProcessString(string);

    vtkNew<vtkXMLDataElement> text;
    this->ActiveNode->AddNestedElement(text);
    text->SetName("text");
    this->ApplyTextPropertyStateToNode(text, point[0], point[1]);
    // Position is encoded in the transform:
    text->SetFloatAttribute("x", 0.f);
    text->SetFloatAttribute("y", 0.f);

    text->SetCharacterData(string.c_str(), static_cast<int>(string.length()));
  }
  else
  {
    // Export other text (e.g. MathText) as a path:
    vtkNew<vtkPath> tPath;
    int dpi = this->Viewport->GetVTKWindow()->GetDPI();
    if (!tren->StringToPath(this->TextProp, string, tPath, dpi, backend))
    {
      vtkErrorMacro("Error generating path for MathText string '" << string << "'.");
      return;
    }

    vtkNew<vtkXMLDataElement> path;
    this->ActiveNode->AddNestedElement(path);
    path->SetName("path");
    this->ApplyTextPropertyStateToNodeForPath(path, point[0], point[1]);

    std::ostringstream d;
    this->DrawPath(tPath, d);
    path->SetAttribute("d", d.str().c_str());
  }
}

//------------------------------------------------------------------------------
void vtkSVGContextDevice2D::ComputeStringBounds(const vtkStdString& string, float bounds[4])