TypeScript frontend.ChunkManager類代碼示例

 getSources(chunkManager: ChunkManager) {
   let sources: VolumeChunkSource[][] = [];
   const {response, volumeType} = this;
   const datasetObject = response['dataset'];
   const encoding = volumeType === VolumeType.IMAGE ? 'jpeg' : 'npz';
   for (let resolution of Object.keys(datasetObject['neariso_imagesize'])) {
     let imageSize = parseIntVec(vec3.create(), datasetObject['neariso_imagesize'][resolution]);
     let voxelSize = parseFiniteVec(vec3.create(), datasetObject['neariso_voxelres'][resolution]);
     let alternatives: VolumeChunkSource[] = [];
     sources.push(alternatives);
     // The returned offset for downsampled resolutions can have non-integer components.  It
     // appears that the true offset is obtained by rounding up.
     let origLowerVoxelBound =
         parseFiniteVec(vec3.create(), datasetObject['neariso_offset'][resolution]);
     let lowerVoxelBound = vec3.create();
     let upperVoxelBound = vec3.create();
     for (let i = 0; i < 3; ++i) {
       let origLower = origLowerVoxelBound[i];
       lowerVoxelBound[i] = Math.ceil(origLower);
       upperVoxelBound[i] = Math.floor(origLower + imageSize[i]);
     }
     for (let spec of VolumeChunkSpecification.getDefaults({
            volumeType,
            voxelSize,
            dataType: this.dataType, lowerVoxelBound, upperVoxelBound
          })) {
       let cacheKey = stableStringify(
           {'spec': spec, key: this.key, channel: this.channel, resolution: resolution});
       alternatives.push(chunkManager.getChunkSource(
           VolumeChunkSource, cacheKey,
           () => new VolumeChunkSource(
               chunkManager, spec, this.hostnames, this.key, this.channel, resolution, encoding)));
     }
   }
   return sources;
 }

function getNiftiVolumeInfo(chunkManager: ChunkManager, url: string, cancellationToken: CancellationToken) {
  return chunkManager.rpc!.promiseInvoke<NiftiVolumeInfo>(
      GET_NIFTI_VOLUME_INFO_RPC_ID, {'chunkManager': chunkManager.addCounterpartRef(), 'url': url},
      cancellationToken);
}

 static get(chunkManager: ChunkManager, spec: VolumeChunkSpecification, parameters: Parameters) {
   return chunkManager.getChunkSource(
       this, stableStringify({parameters, spec: spec.toObject()}),
       () => new this(chunkManager, spec, parameters));
 }

export function getShardedMeshSource(chunkManager: ChunkManager, parameters: MeshSourceParameters) {
  return chunkManager.getChunkSource(PrecomputedMeshSource, {parameters});
}

  getSources(vectorGraphicsSourceOptions: VectorGraphicsSourceOptions) {
    const voxelSize = this.stackInfo.voxelResolution;
    const chunkSize = vec3.subtract(
        vec3.create(), this.stackInfo.upperVoxelBound, this.stackInfo.lowerVoxelBound);
    vec3.multiply(chunkSize, chunkSize, voxelSize);
    chunkSize[2] = voxelSize[2];

    const spec = VectorGraphicsChunkSpecification.make({
      voxelSize,
      chunkSize,
      lowerChunkBound: vec3.fromValues(0, 0, this.stackInfo.lowerVoxelBound[2]),
      upperChunkBound: vec3.fromValues(1, 1, this.stackInfo.upperVoxelBound[2]),
      vectorGraphicsSourceOptions
    });
    const source = this.chunkManager.getChunkSource(PointMatchSource, {
      spec,
      parameters: {
        'baseUrls': this.baseUrls,
        'owner': this.ownerInfo.owner,
        'project': this.stackInfo.project,
        'stack': this.stack,
        'encoding': 'points',
        'matchCollection': this.matchCollection,
        'zoffset': this.zoffset
      }
    });

    return [[source]];
  }

 .map(spec => this.chunkManager.getChunkSource(PrecomputedVolumeChunkSource, {
   spec,
   parameters: {
     'baseUrls': this.baseUrls,
     'path': `${this.path}/${scaleInfo.key}`,
     'encoding': scaleInfo.encoding
   }
 }));

 .map(spec => {
   let path = `${this.path}/${scaleInfo.key}`;
   let cacheKey = stableStringify({
     'spec': spec,
     'baseUrls': this.baseUrls,
     'path': path,
     'encoding': scaleInfo.encoding
   });
   return chunkManager.getChunkSource(
       VolumeChunkSource, cacheKey,
       () => new VolumeChunkSource(
           chunkManager, spec, this.baseUrls, path, scaleInfo.encoding));
 });