Method WritePatterns

IO/Export/vtkSVGContextDevice2D.cxx:2440–2477

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//------------------------------------------------------------------------------
void vtkSVGContextDevice2D::WritePatterns()
{
  for (const PatternInfo& info : this->Impl->PatternSet)
  {
    vtkNew<vtkXMLDataElement> pattern;
    this->DefinitionNode->AddNestedElement(pattern);
    pattern->SetName("pattern");
    pattern->SetAttribute("id", info.PatternId.c_str());

    // We only care about Repeat and Stretch, since SVG doesn't allow control
    // over Nearest/Linear interpolation.
    const bool isTiled = ((info.TextureProperty & vtkBrush::Repeat) != 0);
    if (isTiled)
    {
      pattern->SetIntAttribute("width", info.ImageSize[0]);
      pattern->SetIntAttribute("height", info.ImageSize[1]);
      pattern->SetAttribute("patternUnits", "userSpaceOnUse");
    }
    else // Stretched
    {
      std::ostringstream viewBox;
      viewBox << "0,0," << info.ImageSize[0] << "," << info.ImageSize[1];
      pattern->SetIntAttribute("width", 1);
      pattern->SetIntAttribute("height", 1);
      pattern->SetAttribute("viewBox", viewBox.str().c_str());
      pattern->SetAttribute("preserveAspectRatio", "none");
    }

    vtkNew<vtkXMLDataElement> use;
    pattern->AddNestedElement(use);
    use->SetName("use");
    use->SetFloatAttribute("x", 0);
    use->SetFloatAttribute("y", 0);
    use->SetIntAttribute("width", info.ImageSize[0]);
    use->SetIntAttribute("height", info.ImageSize[1]);
    use->SetAttribute("xlink:href", (std::string("#") + info.ImageId).c_str());
  }
}

//------------------------------------------------------------------------------
void vtkSVGContextDevice2D::WriteClipRects()