@pixi/core/lib/geometry/Buffer.js

"use strict";
var constants = require("@pixi/constants"), runner = require("@pixi/runner");
let UID = 0;
class Buffer {
  /**
   * @param {PIXI.IArrayBuffer} data - the data to store in the buffer.
   * @param _static - `true` for static buffer
   * @param index - `true` for index buffer
   */
  constructor(data, _static = !0, index = !1) {
    this.data = data || new Float32Array(1), this._glBuffers = {}, this._updateID = 0, this.index = index, this.static = _static, this.id = UID++, this.disposeRunner = new runner.Runner("disposeBuffer");
  }
  // TODO could explore flagging only a partial upload?
  /**
   * Flags this buffer as requiring an upload to the GPU.
   * @param {PIXI.IArrayBuffer|number[]} [data] - the data to update in the buffer.
   */
  update(data) {
    data instanceof Array && (data = new Float32Array(data)), this.data = data || this.data, this._updateID++;
  }
  /** Disposes WebGL resources that are connected to this geometry. */
  dispose() {
    this.disposeRunner.emit(this, !1);
  }
  /** Destroys the buffer. */
  destroy() {
    this.dispose(), this.data = null;
  }
  /**
   * Flags whether this is an index buffer.
   *
   * Index buffers are of type `ELEMENT_ARRAY_BUFFER`. Note that setting this property to false will make
   * the buffer of type `ARRAY_BUFFER`.
   *
   * For backwards compatibility.
   */
  set index(value) {
    this.type = value ? constants.BUFFER_TYPE.ELEMENT_ARRAY_BUFFER : constants.BUFFER_TYPE.ARRAY_BUFFER;
  }
  get index() {
    return this.type === constants.BUFFER_TYPE.ELEMENT_ARRAY_BUFFER;
  }
  /**
   * Helper function that creates a buffer based on an array or TypedArray
   * @param {ArrayBufferView | number[]} data - the TypedArray that the buffer will store. If this is a regular Array it will be converted to a Float32Array.
   * @returns - A new Buffer based on the data provided.
   */
  static from(data) {
    return data instanceof Array && (data = new Float32Array(data)), new Buffer(data);
  }
}
exports.Buffer = Buffer;
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