'use strict';

exports.__esModule = true;

var _BaseTexture2 = require('./BaseTexture');

var _BaseTexture3 = _interopRequireDefault(_BaseTexture2);

var _settings = require('../settings');

var _settings2 = _interopRequireDefault(_settings);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var RESOLUTION = _settings2.default.RESOLUTION,
    SCALE_MODE = _settings2.default.SCALE_MODE;

/**
 * A BaseRenderTexture is a special texture that allows any Pixi display object to be rendered to it.
 *
 * __Hint__: All DisplayObjects (i.e. Sprites) that render to a BaseRenderTexture should be preloaded
 * otherwise black rectangles will be drawn instead.
 *
 * A BaseRenderTexture takes a snapshot of any Display Object given to its render method. The position
 * and rotation of the given Display Objects is ignored. For example:
 *
 * ```js
 * let renderer = PIXI.autoDetectRenderer(1024, 1024, { view: canvas, ratio: 1 });
 * let baseRenderTexture = new PIXI.BaseRenderTexture(renderer, 800, 600);
 * let sprite = PIXI.Sprite.fromImage("spinObj_01.png");
 *
 * sprite.position.x = 800/2;
 * sprite.position.y = 600/2;
 * sprite.anchor.x = 0.5;
 * sprite.anchor.y = 0.5;
 *
 * baseRenderTexture.render(sprite);
 * ```
 *
 * The Sprite in this case will be rendered to a position of 0,0. To render this sprite at its actual
 * position a Container should be used:
 *
 * ```js
 * let doc = new PIXI.Container();
 *
 * doc.addChild(sprite);
 *
 * let baseRenderTexture = new PIXI.BaseRenderTexture(100, 100);
 * let renderTexture = new PIXI.RenderTexture(baseRenderTexture);
 *
 * renderer.render(doc, renderTexture);  // Renders to center of RenderTexture
 * ```
 *
 * @class
 * @extends PIXI.BaseTexture
 * @memberof PIXI
 */

var BaseRenderTexture = function (_BaseTexture) {
  _inherits(BaseRenderTexture, _BaseTexture);

  /**
   * @param {number} [width=100] - The width of the base render texture
   * @param {number} [height=100] - The height of the base render texture
   * @param {number} [scaleMode=PIXI.settings.SCALE_MODE] - See {@link PIXI.SCALE_MODES} for possible values
   * @param {number} [resolution=1] - The resolution / device pixel ratio of the texture being generated
   */
  function BaseRenderTexture() {
    var width = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 100;
    var height = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 100;
    var scaleMode = arguments[2];
    var resolution = arguments[3];

    _classCallCheck(this, BaseRenderTexture);

    var _this = _possibleConstructorReturn(this, _BaseTexture.call(this, null, scaleMode));

    _this.resolution = resolution || RESOLUTION;

    _this.width = width;
    _this.height = height;

    _this.realWidth = _this.width * _this.resolution;
    _this.realHeight = _this.height * _this.resolution;

    _this.scaleMode = scaleMode || SCALE_MODE;
    _this.hasLoaded = true;

    /**
     * A map of renderer IDs to webgl renderTargets
     *
     * @private
     * @member {object<number, WebGLTexture>}
     */
    _this._glRenderTargets = {};

    /**
     * A reference to the canvas render target (we only need one as this can be shared across renderers)
     *
     * @private
     * @member {object<number, WebGLTexture>}
     */
    _this._canvasRenderTarget = null;

    /**
     * This will let the renderer know if the texture is valid. If it's not then it cannot be rendered.
     *
     * @member {boolean}
     */
    _this.valid = false;
    return _this;
  }

  /**
   * Resizes the BaseRenderTexture.
   *
   * @param {number} width - The width to resize to.
   * @param {number} height - The height to resize to.
   */


  BaseRenderTexture.prototype.resize = function resize(width, height) {
    if (width === this.width && height === this.height) {
      return;
    }

    this.valid = width > 0 && height > 0;

    this.width = width;
    this.height = height;

    this.realWidth = this.width * this.resolution;
    this.realHeight = this.height * this.resolution;

    if (!this.valid) {
      return;
    }

    this.emit('update', this);
  };

  /**
   * Destroys this texture
   *
   */


  BaseRenderTexture.prototype.destroy = function destroy() {
    _BaseTexture.prototype.destroy.call(this, true);
    this.renderer = null;
  };

  return BaseRenderTexture;
}(_BaseTexture3.default);

exports.default = BaseRenderTexture;
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