Method GetWebGLBinaryData

Web/Core/vtkWebApplication.cxx:393–443

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

//------------------------------------------------------------------------------
const char* vtkWebApplication::GetWebGLBinaryData(vtkRenderWindow* view, const char* id, int part)
{
  if (!view)
  {
    vtkErrorMacro("No view specified.");
    return nullptr;
  }
  if (this->Internals->ViewWebGLMap.find(view) == this->Internals->ViewWebGLMap.end())
  {
    if (this->GetWebGLSceneMetaData(view) == nullptr)
    {
      vtkErrorMacro("Failed to generate WebGL MetaData for: " << view);
      return nullptr;
    }
  }

  vtkWebGLExporter* webglExporter = this->Internals->ViewWebGLMap[view];
  if (webglExporter == nullptr)
  {
    vtkErrorMacro("There is no cached WebGL Exporter for: " << view);
    return nullptr;
  }

  if (!this->Internals->WebGLExporterObjIdMap[webglExporter].empty() &&
    this->Internals->WebGLExporterObjIdMap[webglExporter].find(id) !=
      this->Internals->WebGLExporterObjIdMap[webglExporter].end())
  {
    vtkInternals::WebGLObjCacheValue* cachedVal =
      &(this->Internals->WebGLExporterObjIdMap[webglExporter][id]);
    if (cachedVal->BinaryParts.find(part) != cachedVal->BinaryParts.end())
    {
      if (cachedVal->BinaryParts[part].empty())
      {
        vtkWebGLObject* obj = webglExporter->GetWebGLObject(cachedVal->ObjIndex);
        if (obj && obj->isVisible())
        {
          // Manage Base64
          vtkNew<vtkBase64Utilities> base64;
          unsigned char* output = new unsigned char[obj->GetBinarySize(part) * 2];
          int size =
            base64->Encode(obj->GetBinaryData(part), obj->GetBinarySize(part), output, false);
          cachedVal->BinaryParts[part] = std::string((const char*)output, size);
          delete[] output;
        }
      }
      return cachedVal->BinaryParts[part].c_str();
    }
  }

  return nullptr;
}

//------------------------------------------------------------------------------
void vtkWebApplication::PrintSelf(ostream& os, vtkIndent indent)