SynchronizableRenderWindow

Source

index.js

import * as macro from 'vtk.js/Sources/macro';
import Base64 from 'vtk.js/Sources/Common/Core/Base64';
import vtkRenderWindow from 'vtk.js/Sources/Rendering/Core/RenderWindow';
import vtkObjectManager from './vtkObjectManager';

const SYNCHRONIZER_CONTEXTS = {};

// ----------------------------------------------------------------------------
// Static methods
// ----------------------------------------------------------------------------

function createArrayHandler() {
  const dataArrayCache = {};
  let arrayFetcher = null;

  function setFetchArrayFunction(fetcher) {
    arrayFetcher = fetcher;
  }

  function getArray(sha, dataType, context) {
    const arrayEntry = dataArrayCache[sha];
    if (arrayEntry) {
      arrayEntry.mtimes[context.getActiveViewId()] = context.getMTime();
      return new Promise((resolve, reject) => {
        resolve(arrayEntry.array);
      });
    }

    if (!arrayFetcher) {
      return Promise.reject(
        new Error(
          'No array fetcher found, please use "setArrayFetcher" to provide one'
        )
      );
    }

    return new Promise((resolve, reject) => {
      arrayFetcher(sha).then(
        (data) => {
          let buffer = data;
          if (typeof data === 'string') {
            buffer = Base64.toArrayBuffer(data);
          }
          if (buffer instanceof Blob) {
            const fileReader = new FileReader();
            fileReader.onload = () => {
              const array = macro.newTypedArray(dataType, fileReader.result);
              const mtimes = {
                [context.getActiveViewId()]: context.getMTime(),
              };
              dataArrayCache[sha] = { mtimes, array };
              resolve(array);
            };
            fileReader.readAsArrayBuffer(buffer);
          } else {
            const array = macro.newTypedArray(dataType, buffer);
            const mtimes = { [context.getActiveViewId()]: context.getMTime() };
            dataArrayCache[sha] = { mtimes, array };
            resolve(array);
          }
        },
        (error) => {
          console.log('Error getting data array:');
          console.log(error);
          reject(error);
        }
      );
    });
  }

  function emptyCachedArrays() {
    Object.keys(dataArrayCache).forEach((key) => {
      delete dataArrayCache[key];
    });
  }

  function freeOldArrays(threshold, context) {
    const mtimeThreshold = context.getMTime() - threshold;
    Object.keys(dataArrayCache)
      .filter((key) => dataArrayCache[key].mtimes[context.getActiveViewId()])
      .filter(
        (key) =>
          dataArrayCache[key].mtimes[context.getActiveViewId()] < mtimeThreshold
      )
      .forEach((key) => {
        delete dataArrayCache[key];
      });
  }

  return {
    setFetchArrayFunction,
    getArray,
    emptyCachedArrays,
    freeOldArrays,
  };
}

// ----------------------------------------------------------------------------

function createInstanceMap() {
  const instances = {};

  function getInstance(id) {
    return instances[id];
  }

  function getInstanceId(instance) {
    let instanceId = null;

    Object.keys(instances).forEach((id) => {
      if (instance === instances[id]) {
        instanceId = id;
      }
    });

    return instanceId;
  }

  function registerInstance(id, instance) {
    instances[id] = instance;
  }

  function unregisterInstance(id) {
    delete instances[id];
  }

  function emptyCachedInstances() {
    Object.keys(instances).forEach((key) => {
      delete instances[key];
    });
  }

  return {
    getInstance,
    getInstanceId,
    registerInstance,
    unregisterInstance,
    emptyCachedInstances,
  };
}

// ----------------------------------------------------------------------------

function createProgressHandler() {
  let readyCount = 0;
  const publicAPI = {
    start() {
      readyCount += 1;
      publicAPI.invokeProgressEvent(readyCount);
    },
    end() {
      readyCount -= 1;
      publicAPI.invokeProgressEvent(readyCount);
      if (readyCount === 0) {
        publicAPI.invokeProgressDone();
      }
    },
    resetProgress() {
      readyCount = 0;
    },
  };
  const model = {};
  macro.event(publicAPI, model, 'progressEvent');
  macro.event(publicAPI, model, 'progressDone');

  return publicAPI;
}

// ----------------------------------------------------------------------------

function createSceneMtimeHandler() {
  const mtimes = {};
  let activeViewId = 'default';

  function getMTime(viewId) {
    const key = viewId || activeViewId;
    return mtimes[key] || 1;
  }

  function incrementMTime(viewId) {
    const key = viewId || activeViewId;
    if (!mtimes[key]) {
      mtimes[key] = 1;
    }
    mtimes[key] += 1;
  }

  function setActiveViewId(viewId) {
    activeViewId = viewId;
  }

  function getActiveViewId() {
    return activeViewId;
  }

  return { getMTime, incrementMTime, setActiveViewId, getActiveViewId };
}

// ----------------------------------------------------------------------------

function getSynchronizerContext(name = 'default') {
  let ctx = SYNCHRONIZER_CONTEXTS[name];
  if (!ctx) {
    ctx = {
      ...createArrayHandler(),
      ...createInstanceMap(),
      ...createProgressHandler(),
      ...createSceneMtimeHandler(),
    };
    SYNCHRONIZER_CONTEXTS[name] = ctx;
  }
  return ctx;
}

// ----------------------------------------------------------------------------

function setSynchronizerContext(name, ctx) {
  SYNCHRONIZER_CONTEXTS[name] = ctx;
}

// ----------------------------------------------------------------------------

function createSyncFunction(renderWindow, synchronizerContext) {
  let lastMtime = -1;
  let gcThreshold = 100;

  const getManagedInstanceId = (instance) =>
    instance.get('managedInstanceId').managedInstanceId;
  const getManagedInstanceIds = () =>
    macro.traverseInstanceTree(renderWindow, getManagedInstanceId);

  function clearOneTimeUpdaters() {
    vtkObjectManager.clearOneTimeUpdaters(getManagedInstanceIds());
  }

  function setSynchronizedViewId(synchronizedViewId) {
    renderWindow.set({ synchronizedViewId }, true, true);
  }

  function getSynchronizedViewId() {
    return renderWindow.get('synchronizedViewId').synchronizedViewId;
  }

  function updateGarbageCollectorThreshold(v) {
    gcThreshold = v;
  }

  function synchronize(state) {
    if (!getSynchronizedViewId()) {
      setSynchronizedViewId(state.id);
    }
    const mtime = state.mtime || 0;
    if (getSynchronizedViewId() === state.id && lastMtime < mtime) {
      return new Promise((resolve, reject) => {
        const subscription = synchronizerContext.onProgressDone(() => {
          subscription.unsubscribe();
          renderWindow.render();
          resolve(true);
        });
        lastMtime = mtime;
        synchronizerContext.setActiveViewId(state.id);
        synchronizerContext.incrementMTime();
        vtkObjectManager.updateRenderWindow(
          renderWindow,
          state,
          synchronizerContext
        );
        synchronizerContext.freeOldArrays(gcThreshold, synchronizerContext);
      });
    }
    return Promise.resolve(false);
  }

  return {
    synchronize,
    setSynchronizedViewId,
    getSynchronizedViewId,
    updateGarbageCollectorThreshold,
    getManagedInstanceIds,
    clearOneTimeUpdaters,
  };
}

// ----------------------------------------------------------------------------
// vtkSynchronizableRenderWindow methods
// ----------------------------------------------------------------------------

function vtkSynchronizableRenderWindow(publicAPI, model) {
  // Set our className
  model.classHierarchy.push('vtkSynchronizableRenderWindow');

  if (!model.synchronizerContext) {
    model.synchronizerContext = getSynchronizerContext(
      model.synchronizerContextName
    );
  }

  const addOn = createSyncFunction(publicAPI, model.synchronizerContext);

  Object.keys(addOn).forEach((methodName) => {
    if (publicAPI[methodName]) {
      publicAPI[methodName] = macro.chain(
        publicAPI[methodName],
        addOn[methodName]
      );
    } else {
      publicAPI[methodName] = addOn[methodName];
    }
  });
}

// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------

export const DEFAULT_VALUES = {
  synchronizerContextName: 'default',
  synchronizerContext: null,
  synchronizedViewId: null,
};

// ----------------------------------------------------------------------------

export function extend(publicAPI, model, initialValues = {}) {
  Object.assign(model, DEFAULT_VALUES, initialValues);

  // Build VTK API
  vtkRenderWindow.extend(publicAPI, model);
  macro.get(publicAPI, model, ['synchronizerContext']);

  // Object methods
  vtkSynchronizableRenderWindow(publicAPI, model);
}

// ----------------------------------------------------------------------------

export const newInstance = macro.newInstance(
  extend,
  'vtkSynchronizableRenderWindow'
);

// ----------------------------------------------------------------------------
// More Static methods
// ----------------------------------------------------------------------------

function decorate(renderWindow, name = 'default') {
  const addOn = createSyncFunction(renderWindow, getSynchronizerContext(name));
  return {
    ...addOn,
    ...renderWindow,
    delete: macro.chain(renderWindow.delete, addOn.delete),
  };
}

// ----------------------------------------------------------------------------

export default {
  newInstance,
  extend,
  getSynchronizerContext,
  setSynchronizerContext,
  decorate,
  createInstanceMap,
  createArrayHandler,
  createProgressHandler,
  createSceneMtimeHandler,
  vtkObjectManager,
};

vtkObjectManager.js

import * as macro from 'vtk.js/Sources/macro';

import vtkActor from 'vtk.js/Sources/Rendering/Core/Actor';
import vtkCamera from 'vtk.js/Sources/Rendering/Core/Camera';
import vtkColorTransferFunction from 'vtk.js/Sources/Rendering/Core/ColorTransferFunction';
import vtkDataArray from 'vtk.js/Sources/Common/Core/DataArray';
import vtkPoints from 'vtk.js/Sources/Common/Core/Points';
import vtkCellArray from 'vtk.js/Sources/Common/Core/CellArray';
import vtkGlyph3DMapper from 'vtk.js/Sources/Rendering/Core/Glyph3DMapper';
import vtkLight from 'vtk.js/Sources/Rendering/Core/Light';
import vtkLookupTable from 'vtk.js/Sources/Common/Core/LookupTable';
import vtkMapper from 'vtk.js/Sources/Rendering/Core/Mapper';
import vtkPolyData from 'vtk.js/Sources/Common/DataModel/PolyData';
import vtkImageData from 'vtk.js/Sources/Common/DataModel/ImageData';
import vtkProperty from 'vtk.js/Sources/Rendering/Core/Property';
import vtkRenderer from 'vtk.js/Sources/Rendering/Core/Renderer';
import vtkRenderWindow from 'vtk.js/Sources/Rendering/Core/RenderWindow';
import vtkTexture from 'vtk.js/Sources/Rendering/Core/Texture';
import vtkVolume from 'vtk.js/Sources/Rendering/Core/Volume';
import vtkVolumeMapper from 'vtk.js/Sources/Rendering/Core/VolumeMapper';
import vtkVolumeProperty from 'vtk.js/Sources/Rendering/Core/VolumeProperty';
import vtkImageSlice from 'vtk.js/Sources/Rendering/Core/ImageSlice';
import vtkImageMapper from 'vtk.js/Sources/Rendering/Core/ImageMapper';
import vtkImageProperty from 'vtk.js/Sources/Rendering/Core/ImageProperty';
import vtkPiecewiseFunction from 'vtk.js/Sources/Common/DataModel/PiecewiseFunction';

// ----------------------------------------------------------------------------
// Some internal, module-level variables and methods
// ----------------------------------------------------------------------------

const TYPE_HANDLERS = {};
const WRAPPED_ID_RE = /instance:\${([^}]+)}/;
const WRAP_ID = (id) => `instance:$\{${id}}`;
const ONE_TIME_INSTANCE_TRACKERS = {};
const SKIPPED_INSTANCE_IDS = [];
const EXCLUDE_INSTANCE_MAP = {};
const DATA_ARRAY_MAPPER = {
  vtkPoints,
  vtkCellArray,
  vtkDataArray,
};

// ----------------------------------------------------------------------------

function extractCallArgs(synchronizerContext, argList) {
  return argList.map((arg) => {
    const m = WRAPPED_ID_RE.exec(arg);
    if (m) {
      return synchronizerContext.getInstance(m[1]);
    }
    return arg;
  });
}

// ----------------------------------------------------------------------------

function extractInstanceIds(argList) {
  return argList
    .map((arg) => WRAPPED_ID_RE.exec(arg))
    .filter((m) => m)
    .map((m) => m[1]);
}

// ----------------------------------------------------------------------------

function extractDependencyIds(state, depList = []) {
  if (state.dependencies) {
    state.dependencies.forEach((childState) => {
      depList.push(childState.id);
      extractDependencyIds(childState, depList);
    });
  }
  return depList;
}

// ----------------------------------------------------------------------------

function bindArrays(arraysToBind) {
  while (arraysToBind.length) {
    const [fn, args] = arraysToBind.shift();
    fn(...args);
  }
}

// ----------------------------------------------------------------------------

function createNewArrayHandler(instance, arrayMetadata, arraysToBind) {
  return (values) => {
    const vtkClass = arrayMetadata.vtkClass
      ? arrayMetadata.vtkClass
      : 'vtkDataArray';
    const array = DATA_ARRAY_MAPPER[vtkClass].newInstance({
      ...arrayMetadata,
      values,
    });
    const regMethod = arrayMetadata.registration
      ? arrayMetadata.registration
      : 'addArray';
    const location = arrayMetadata.location
      ? instance.getReferenceByName(arrayMetadata.location)
      : instance;
    arraysToBind.push([location[regMethod], [array]]);
    return array;
  };
}

// ----------------------------------------------------------------------------
// Static methods for export
// ----------------------------------------------------------------------------

function update(type, instance, props, context) {
  if (!instance) {
    return;
  }
  const handler = TYPE_HANDLERS[type];
  if (handler && handler.update) {
    handler.update(instance, props, context);
  } else {
    console.log('no updater for', type);
  }
}

// ----------------------------------------------------------------------------

function build(type, initialProps = {}) {
  const handler = TYPE_HANDLERS[type];

  if (handler && handler.build) {
    // DEBUG console.log(`new ${type} - ${initialProps.managedInstanceId}`);
    return handler.build(initialProps);
  }

  console.log('No builder for', type);
  return null;
}

// ----------------------------------------------------------------------------

function excludeInstance(type, propertyName, propertyValue) {
  EXCLUDE_INSTANCE_MAP[type] = {
    key: propertyName,
    value: propertyValue,
  };
}

// ----------------------------------------------------------------------------

function getSupportedTypes() {
  return Object.keys(TYPE_HANDLERS);
}

// ----------------------------------------------------------------------------

function clearTypeMapping() {
  Object.keys(TYPE_HANDLERS).forEach((key) => {
    delete TYPE_HANDLERS[key];
  });
}

// ----------------------------------------------------------------------------

function updateRenderWindow(instance, props, context) {
  return update('vtkRenderWindow', instance, props, context);
}

// ----------------------------------------------------------------------------

function clearAllOneTimeUpdaters() {
  Object.keys(ONE_TIME_INSTANCE_TRACKERS).forEach((key) => {
    delete ONE_TIME_INSTANCE_TRACKERS[key];
  });
}

// ----------------------------------------------------------------------------

function clearOneTimeUpdaters(...ids) {
  if (ids.length === 0) {
    return clearAllOneTimeUpdaters();
  }

  let array = ids;
  // allow an array passed as a single arg.
  if (array.length === 1 && Array.isArray(array[0])) {
    array = array[0];
  }
  array.forEach((instanceId) => {
    delete ONE_TIME_INSTANCE_TRACKERS[instanceId];
  });
  return array;
}

// ----------------------------------------------------------------------------

function notSkippedInstance(call) {
  if (call[1].length === 1) {
    return SKIPPED_INSTANCE_IDS.indexOf(call[1][0]) === -1;
  }
  let keep = false;
  for (let i = 0; i < call[1].length; i++) {
    keep = keep || SKIPPED_INSTANCE_IDS.indexOf(call[1][i]) === -1;
  }
  return keep;
}

// ----------------------------------------------------------------------------
// Updater functions
// ----------------------------------------------------------------------------

function genericUpdater(instance, state, context) {
  context.start(); // -> start(generic-updater)

  // First update our own properties
  instance.set(state.properties);

  // Now handle dependencies
  if (state.dependencies) {
    state.dependencies.forEach((childState) => {
      const { id, type } = childState;

      if (EXCLUDE_INSTANCE_MAP[type]) {
        const { key, value } = EXCLUDE_INSTANCE_MAP[type];
        if (!key || childState.properties[key] === value) {
          SKIPPED_INSTANCE_IDS.push(WRAP_ID(id));
          return;
        }
      }

      let childInstance = context.getInstance(id);
      if (!childInstance) {
        childInstance = build(type, { managedInstanceId: id });
        context.registerInstance(id, childInstance);
      }
      update(type, childInstance, childState, context);
    });
  }

  if (state.calls) {
    state.calls.filter(notSkippedInstance).forEach((call) => {
      // DEBUG console.log('==>', call[0], extractCallArgs(context, call[1]));
      instance[call[0]].apply(null, extractCallArgs(context, call[1]));
    });
  }

  // if some arrays need to be be fetch
  if (state.arrays) {
    const arraysToBind = [];
    const promises = state.arrays.map((arrayMetadata) => {
      context.start(); // -> start(arrays)
      return context
        .getArray(arrayMetadata.hash, arrayMetadata.dataType, context)
        .then(createNewArrayHandler(instance, arrayMetadata, arraysToBind))
        .catch((error) => {
          console.log(
            'Error fetching array',
            JSON.stringify(arrayMetadata),
            error
          );
        })
        .finally(context.end); // -> end(arrays)
    });
    context.start(); // -> start(arraysToBind)
    Promise.all(promises)
      .then(() => {
        bindArrays(arraysToBind);
      })
      .catch((error) => {
        console.error(
          'Error in array handling for state',
          JSON.stringify(state),
          error
        );
      })
      .finally(context.end); // -> end(arraysToBind)
  }
  context.end(); // -> end(generic-updater)
}

// ----------------------------------------------------------------------------

function oneTimeGenericUpdater(instance, state, context) {
  if (!ONE_TIME_INSTANCE_TRACKERS[state.id]) {
    genericUpdater(instance, state, context);
  }

  ONE_TIME_INSTANCE_TRACKERS[state.id] = true;
}

// ----------------------------------------------------------------------------

function rendererUpdater(instance, state, context) {
  // Don't do start/end on the context here because we don't need to hold up
  // rendering for the book-keeping we do after the genericUpdater finishes.

  // First allow generic update process to happen as usual
  genericUpdater(instance, state, context);

  // Any view props that were removed in the previous phase, genericUpdater(...),
  // may have left orphaned children in our instance cache.  Below is where those
  // refs can be tracked in the first place, and then later removed as necessary
  // to allow garbage collection.

  // In some cases, seemingly with 'vtkColorTransferFunction', the server side
  // object id may be conserved even though the actor and mapper containing or
  // using it were deleted.  In this case we must not unregister an instance
  // which is depended upon by an incoming actor just because it was also
  // depended upon by an outgoing one.
  const allActorsDeps = new Set();

  // Here we gather the list of dependencies (instance ids) for each view prop and
  // store them on the instance, in case that view prop is later removed.
  if (state.dependencies) {
    state.dependencies.forEach((childState) => {
      const viewPropInstance = context.getInstance(childState.id);
      if (viewPropInstance) {
        const flattenedDepIds = extractDependencyIds(childState);
        viewPropInstance.set({ flattenedDepIds }, true);
        flattenedDepIds.forEach((depId) => allActorsDeps.add(depId));
      }
    });
  }

  // Look for 'removeViewProp' calls and clean up references to dependencies of
  // those view props.
  const unregisterCandidates = new Set();

  if (state.calls) {
    state.calls
      .filter(notSkippedInstance)
      .filter((call) => call[0] === 'removeViewProp')
      .forEach((call) => {
        // extract any ids associated with a 'removeViewProp' call (though really there
        // should just be a single one), and use them to build a flat list of all
        // representation dependency ids which we can then use our synchronizer context
        // to unregister
        extractInstanceIds(call[1]).forEach((vpId) => {
          const deps = context.getInstance(vpId).get('flattenedDepIds')
            .flattenedDepIds;
          if (deps) {
            // Consider each dependency for un-registering
            deps.forEach((depId) => unregisterCandidates.add(depId));
          }
          // Consider the viewProp itself for un-registering
          unregisterCandidates.add(vpId);
        });
      });
  }

  // Now unregister any instances that are no longer needed
  const idsToUnregister = [...unregisterCandidates].filter(
    (depId) => !allActorsDeps.has(depId)
  );
  idsToUnregister.forEach((depId) => context.unregisterInstance(depId));
}

// ----------------------------------------------------------------------------

function vtkRenderWindowUpdater(instance, state, context) {
  // For each renderer we may be removing from this render window, we should first
  // remove all of the renderer's view props, then have the render window re-render
  // itself.  This will clear the screen, at which point we can go about the normal
  // updater process.
  if (state.calls) {
    state.calls
      .filter(notSkippedInstance)
      .filter((call) => call[0] === 'removeRenderer')
      .forEach((call) => {
        extractInstanceIds(call[1]).forEach((renId) => {
          const renderer = context.getInstance(renId);
          // Take brief detour through the view props to unregister the dependencies
          // of each one
          const viewProps = renderer.getViewProps();
          viewProps.forEach((viewProp) => {
            const deps = viewProp.get('flattenedDepIds').flattenedDepIds;
            if (deps) {
              deps.forEach((depId) => context.unregisterInstance(depId));
            }
            context.unregisterInstance(context.getInstanceId(viewProp));
          });
          // Now just remove all the view props
          renderer.removeAllViewProps();
        });
      });
  }

  instance.render();

  // Now just do normal update process
  genericUpdater(instance, state, context);
}

// ----------------------------------------------------------------------------

function colorTransferFunctionUpdater(instance, state, context) {
  context.start(); // -> start(colorTransferFunctionUpdater)
  const nodes = state.properties.nodes.map(
    ([x, r, g, b, midpoint, sharpness]) => ({ x, r, g, b, midpoint, sharpness })
  );
  instance.set({ ...state.properties, nodes }, true);
  instance.sortAndUpdateRange();
  instance.modified();
  context.end(); // -> end(colorTransferFunctionUpdater)
}

function piecewiseFunctionUpdater(instance, state, context) {
  context.start(); // -> start(piecewiseFunctionUpdater)
  const nodes = state.properties.nodes.map(([x, y, midpoint, sharpness]) => ({
    x,
    y,
    midpoint,
    sharpness,
  }));
  instance.set({ ...state.properties, nodes }, true);
  instance.sortAndUpdateRange();
  instance.modified();
  context.end(); // -> end(piecewiseFunctionUpdater)
}

// ----------------------------------------------------------------------------

function createDataSetUpdate(piecesToFetch = []) {
  return (instance, state, context) => {
    context.start(); // -> start(dataset-update)

    // Make sure we provide container for std arrays
    if (!state.arrays) {
      state.arrays = [];
    }

    // Array members
    // => convert old format to generic state.arrays
    piecesToFetch.forEach((key) => {
      if (state.properties[key]) {
        const arrayMeta = state.properties[key];
        arrayMeta.registration = `set${macro.capitalize(key)}`;
        state.arrays.push(arrayMeta);
        delete state.properties[key];
      }
    });

    // Extract dataset fields
    const fieldsArrays = state.properties.fields || [];
    state.arrays.push(...fieldsArrays);
    delete state.properties.fields;

    // Reset any pre-existing fields array
    instance.getPointData().removeAllArrays();
    instance.getCellData().removeAllArrays();

    // Generic handling
    genericUpdater(instance, state, context);

    // Finish what we started
    context.end(); // -> end(dataset-update)
  };
}

const polydataUpdater = createDataSetUpdate([
  'points',
  'polys',
  'verts',
  'lines',
  'strips',
]);
const imageDataUpdater = createDataSetUpdate([]);

// ----------------------------------------------------------------------------
// Construct the type mapping
// ----------------------------------------------------------------------------

function setTypeMapping(type, buildFn = null, updateFn = genericUpdater) {
  if (!build && !update) {
    delete TYPE_HANDLERS[type];
    return;
  }

  TYPE_HANDLERS[type] = { build: buildFn, update: updateFn };
}

// ----------------------------------------------------------------------------

const DEFAULT_ALIASES = {
  vtkMapper: [
    'vtkOpenGLPolyDataMapper',
    'vtkCompositePolyDataMapper2',
    'vtkDataSetMapper',
  ],
  vtkProperty: ['vtkOpenGLProperty'],
  vtkRenderer: ['vtkOpenGLRenderer'],
  vtkCamera: ['vtkOpenGLCamera'],
  vtkColorTransferFunction: ['vtkPVDiscretizableColorTransferFunction'],
  vtkActor: ['vtkOpenGLActor', 'vtkPVLODActor'],
  vtkLight: ['vtkOpenGLLight', 'vtkPVLight'],
  vtkTexture: ['vtkOpenGLTexture'],
  vtkImageMapper: ['vtkOpenGLImageSliceMapper'],
  vtkVolumeMapper: ['vtkFixedPointVolumeRayCastMapper'],
};

// ----------------------------------------------------------------------------

const DEFAULT_MAPPING = {
  vtkRenderWindow: {
    build: vtkRenderWindow.newInstance,
    update: vtkRenderWindowUpdater,
  },
  vtkRenderer: {
    build: vtkRenderer.newInstance,
    update: rendererUpdater,
  },
  vtkLookupTable: {
    build: vtkLookupTable.newInstance,
    update: genericUpdater,
  },
  vtkCamera: {
    build: vtkCamera.newInstance,
    update: oneTimeGenericUpdater,
  },
  vtkPolyData: {
    build: vtkPolyData.newInstance,
    update: polydataUpdater,
  },
  vtkImageData: {
    build: vtkImageData.newInstance,
    update: imageDataUpdater,
  },
  vtkMapper: {
    build: vtkMapper.newInstance,
    update: genericUpdater,
  },
  vtkGlyph3DMapper: {
    build: vtkGlyph3DMapper.newInstance,
    update: genericUpdater,
  },
  vtkProperty: {
    build: vtkProperty.newInstance,
    update: genericUpdater,
  },
  vtkActor: {
    build: vtkActor.newInstance,
    update: genericUpdater,
  },
  vtkLight: {
    build: vtkLight.newInstance,
    update: genericUpdater,
  },
  vtkColorTransferFunction: {
    build: vtkColorTransferFunction.newInstance,
    update: colorTransferFunctionUpdater,
  },
  vtkTexture: {
    build: vtkTexture.newInstance,
    update: genericUpdater,
  },
  vtkVolume: {
    build: vtkVolume.newInstance,
    update: genericUpdater,
  },
  vtkVolumeMapper: {
    build: vtkVolumeMapper.newInstance,
    update: genericUpdater,
  },
  vtkVolumeProperty: {
    build: vtkVolumeProperty.newInstance,
    update: genericUpdater,
  },
  vtkImageSlice: {
    build: vtkImageSlice.newInstance,
    update: genericUpdater,
  },
  vtkImageMapper: {
    build: vtkImageMapper.newInstance,
    update: genericUpdater,
  },
  vtkImageProperty: {
    build: vtkImageProperty.newInstance,
    update: genericUpdater,
  },
  vtkPiecewiseFunction: {
    build: vtkPiecewiseFunction.newInstance,
    update: piecewiseFunctionUpdater,
  },
};

// ----------------------------------------------------------------------------

function setDefaultMapping(reset = true) {
  if (reset) {
    clearTypeMapping();
  }

  Object.keys(DEFAULT_MAPPING).forEach((type) => {
    const mapping = DEFAULT_MAPPING[type];
    setTypeMapping(type, mapping.build, mapping.update);
  });
}

// ----------------------------------------------------------------------------

function applyDefaultAliases() {
  // Add aliases
  Object.keys(DEFAULT_ALIASES).forEach((name) => {
    const aliases = DEFAULT_ALIASES[name];
    aliases.forEach((alias) => {
      TYPE_HANDLERS[alias] = TYPE_HANDLERS[name];
    });
  });
}

// ----------------------------------------------------------------------------

function alwaysUpdateCamera() {
  setTypeMapping('vtkCamera', vtkCamera.newInstance);
  applyDefaultAliases();
}

// ----------------------------------------------------------------------------
setDefaultMapping();
applyDefaultAliases();
// ----------------------------------------------------------------------------

// Avoid handling any lights at the moment
EXCLUDE_INSTANCE_MAP.vtkOpenGLLight = {};
EXCLUDE_INSTANCE_MAP.vtkPVLight = {};
EXCLUDE_INSTANCE_MAP.vtkLight = {};

// ----------------------------------------------------------------------------
// Publicly exposed methods
// ----------------------------------------------------------------------------

export default {
  build,
  update,
  genericUpdater,
  oneTimeGenericUpdater,
  setTypeMapping,
  clearTypeMapping,
  getSupportedTypes,
  clearOneTimeUpdaters,
  updateRenderWindow,
  excludeInstance,
  setDefaultMapping,
  applyDefaultAliases,
  alwaysUpdateCamera,
};