updateBuffer()

in modules/core/src/lib/attribute/attribute.js [139:186]

• 41 lines of code
• 12 McCabe index (conditional complexity)

  updateBuffer({numInstances, data, props, context}) {
    if (!this.needsUpdate()) {
      return false;
    }

    const {
      state: {updateRanges},
      settings: {update, noAlloc}
    } = this;

    let updated = true;
    if (update) {
      // Custom updater - typically for non-instanced layers
      for (const [startRow, endRow] of updateRanges) {
        update.call(context, this, {data, startRow, endRow, props, numInstances});
      }
      if (!this.value) {
        // no value was assigned during update
      } else if (
        this.constant ||
        this.buffer.byteLength < this.value.byteLength + this.byteOffset
      ) {
        this.setData({
          value: this.value,
          constant: this.constant
        });
      } else {
        for (const [startRow, endRow] of updateRanges) {
          const startOffset = Number.isFinite(startRow) ? this.getVertexOffset(startRow) : 0;
          const endOffset = Number.isFinite(endRow)
            ? this.getVertexOffset(endRow)
            : noAlloc || !Number.isFinite(numInstances)
              ? this.value.length
              : numInstances * this.size;

          super.updateSubBuffer({startOffset, endOffset});
        }
      }
      this._checkAttributeArray();
    } else {
      updated = false;
    }

    this.clearNeedsUpdate();
    this.setNeedsRedraw();

    return updated;
  }