@pixi/core/lib/textures/resources/Resource.js

"use strict";
var runner = require("@pixi/runner");
class Resource {
  /**
   * @param width - Width of the resource
   * @param height - Height of the resource
   */
  constructor(width = 0, height = 0) {
    this._width = width, this._height = height, this.destroyed = !1, this.internal = !1, this.onResize = new runner.Runner("setRealSize"), this.onUpdate = new runner.Runner("update"), this.onError = new runner.Runner("onError");
  }
  /**
   * Bind to a parent BaseTexture
   * @param baseTexture - Parent texture
   */
  bind(baseTexture) {
    this.onResize.add(baseTexture), this.onUpdate.add(baseTexture), this.onError.add(baseTexture), (this._width || this._height) && this.onResize.emit(this._width, this._height);
  }
  /**
   * Unbind to a parent BaseTexture
   * @param baseTexture - Parent texture
   */
  unbind(baseTexture) {
    this.onResize.remove(baseTexture), this.onUpdate.remove(baseTexture), this.onError.remove(baseTexture);
  }
  /**
   * Trigger a resize event
   * @param width - X dimension
   * @param height - Y dimension
   */
  resize(width, height) {
    (width !== this._width || height !== this._height) && (this._width = width, this._height = height, this.onResize.emit(width, height));
  }
  /**
   * Has been validated
   * @readonly
   */
  get valid() {
    return !!this._width && !!this._height;
  }
  /** Has been updated trigger event. */
  update() {
    this.destroyed || this.onUpdate.emit();
  }
  /**
   * This can be overridden to start preloading a resource
   * or do any other prepare step.
   * @protected
   * @returns Handle the validate event
   */
  load() {
    return Promise.resolve(this);
  }
  /**
   * The width of the resource.
   * @readonly
   */
  get width() {
    return this._width;
  }
  /**
   * The height of the resource.
   * @readonly
   */
  get height() {
    return this._height;
  }
  /**
   * Set the style, optional to override
   * @param _renderer - yeah, renderer!
   * @param _baseTexture - the texture
   * @param _glTexture - texture instance for this webgl context
   * @returns - `true` is success
   */
  style(_renderer, _baseTexture, _glTexture) {
    return !1;
  }
  /** Clean up anything, this happens when destroying is ready. */
  dispose() {
  }
  /**
   * Call when destroying resource, unbind any BaseTexture object
   * before calling this method, as reference counts are maintained
   * internally.
   */
  destroy() {
    this.destroyed || (this.destroyed = !0, this.dispose(), this.onError.removeAll(), this.onError = null, this.onResize.removeAll(), this.onResize = null, this.onUpdate.removeAll(), this.onUpdate = null);
  }
  /**
   * Abstract, used to auto-detect resource type.
   * @param {*} _source - The source object
   * @param {string} _extension - The extension of source, if set
   */
  static test(_source, _extension) {
    return !1;
  }
}
exports.Resource = Resource;
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