Function ReplaceMaskColorWithBackgroundColor

Infovis/Core/vtkWordCloud.cxx:686–727

  }
}
void ReplaceMaskColorWithBackgroundColor(vtkImageData* finalImage, vtkWordCloud* wordCloud)
{
  auto colors = vtkSmartPointer<vtkNamedColors>::New();

  vtkColor3ub backgroundColor = colors->GetColor3ub(wordCloud->GetBackgroundColorName().c_str());
  unsigned char bkgR = backgroundColor.GetData()[0];
  unsigned char bkgG = backgroundColor.GetData()[1];
  unsigned char bkgB = backgroundColor.GetData()[2];

  vtkColor3ub maskColor = colors->GetColor3ub(wordCloud->GetMaskColorName().c_str());
  unsigned char maskR = maskColor.GetData()[0];
  unsigned char maskG = maskColor.GetData()[1];
  unsigned char maskB = maskColor.GetData()[2];

  vtkImageIterator<unsigned char> finalIt(finalImage, finalImage->GetExtent());
  while (!finalIt.IsAtEnd())
  {
    auto finalSpan = finalIt.BeginSpan();
    while (finalSpan != finalIt.EndSpan())
    {
      unsigned char R, G, B;
      R = *finalSpan;
      G = *(finalSpan + 1);
      B = *(finalSpan + 2);
      // If the pixel does not contain the background color, skip
      // it. Otherwise replace it with the background color.
      if (R != maskR && G != maskG && B != maskB)
      {
        finalSpan += 3;
        continue;
      }
      else
      {
        *finalSpan = bkgR;
        *(finalSpan + 1) = bkgG;
        *(finalSpan + 2) = bkgB;
      }
      finalSpan += 3;
    }
    finalIt.NextSpan();
  }
}

void ShowColorSeriesNames(ostream& os)
{