Source: render/RenderTargetBase.js

  1. import { EventDispatcher } from '../EventDispatcher.js';
  3. /**
  4.  * Render Target is the wrapping class of gl.framebuffer.
  5.  * @constructor
  6.  * @memberof zen3d
  7.  * @extends zen3d.EventDispatcher
  8.  * @abstract
  9.  * @param {number} width - The width of the render target.
  10.  * @param {number} height - The height of the render target.
  11.  */
  12. function RenderTargetBase(width, height) {
  13. 	EventDispatcher.call(this);
  15. 	/**
  16.      * The width of the render target.
  17.      * @type {number}
  18.      */
  19. 	this.width = width;
  21. 	/**
  22.      * The height of the render target.
  23.      * @type {number}
  24.      */
  25. 	this.height = height;
  26. }
  28. RenderTargetBase.prototype = Object.assign(Object.create(EventDispatcher.prototype), /** @lends zen3d.RenderTargetBase.prototype */{
  30. 	constructor: RenderTargetBase,
  32. 	isRenderTarget: true,
  34. 	/**
  35.      * Resize the render target.
  36.      * @param {number} width - The width of the render target.
  37.      * @param {number} height - The height of the render target.
  38.      * @return {boolean} - If size changed.
  39.      */
  40. 	resize: function(width, height) {
  41. 		if (this.width !== width || this.height !== height) {
  42. 			this.dispose();
  43. 			this.width = width;
  44. 			this.height = height;
  46. 			return true;
  47. 		}
  49. 		return false;
  50. 	},
  52. 	/**
  53.      * Dispatches a dispose event.
  54.      */
  55. 	dispose: function() {
  56. 		this.dispatchEvent({ type: 'dispose' });
  57. 	}
  59. });
  61. export { RenderTargetBase };