Method RenderStringInternal

Rendering/FreeType/vtkMathTextFreeTypeTextRenderer.cxx:169–217

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

//------------------------------------------------------------------------------
bool vtkMathTextFreeTypeTextRenderer::RenderStringInternal(vtkTextProperty* tprop,
  const vtkStdString& str, vtkImageData* data, int textDims[2], int dpi, int backend)
{
  if (!data || !tprop)
  {
    vtkErrorMacro("No image container and/or text property supplied!");
    return false;
  }

  if (static_cast<Backend>(backend) == Default)
  {
    backend = this->DefaultBackend;
  }

  if (static_cast<Backend>(backend) == Detect)
  {
    backend = this->DetectBackend(str);
  }

  switch (static_cast<Backend>(backend))
  {
    case MathText:
      if (this->MathTextIsSupported())
      {
        if (this->MathTextUtilities->RenderString(str.c_str(), data, tprop, dpi, textDims))
        {
          return true;
        }
      }
      vtkDebugMacro("MathText unavailable. Falling back to FreeType.");
      [[fallthrough]];
    case FreeType:
    {
      vtkStdString cleanString(str);
      this->CleanUpFreeTypeEscapes(cleanString);
      // Interpret string as UTF-8, use the UTF-16 RenderString overload:
      return this->FreeTypeTools->RenderString(tprop, cleanString, dpi, data, textDims);
    }
    case Default:
    case UserBackend:
    default:
      vtkDebugMacro("Unrecognized backend requested: " << backend);
      break;
    case Detect:
      vtkDebugMacro("Unhandled 'Detect' backend requested!");
      break;
  }
  return false;
}

//------------------------------------------------------------------------------
int vtkMathTextFreeTypeTextRenderer::GetConstrainedFontSizeInternal(const vtkStdString& str,