import EventEmitter from 'eventemitter3';
import {hex2string, hex2rgb} from '../utils';
import {Matrix, Rectangle} from '../math';
import {RENDERER_TYPE, WIN_SIZE} from '../const';
import settings from '../settings';
import Container from '../display/Container';
import RenderTexture from '../textures/RenderTexture';
const tempMatrix = new Matrix();
/**
* The SystemRenderer is the base for a Tiny Renderer. It is extended by the {@link Tiny.CanvasRenderer}
* and {@link Tiny.WebGLRenderer} which can be used for rendering a Tiny scene.
*
* @abstract
* @class
* @extends EventEmitter
* @memberof Tiny
*/
export default class SystemRenderer extends EventEmitter {
/**
* @param {string} system - The name of the system this renderer is for.
* @param {number} width - the width of the screen
* @param {number} height - the height of the screen
* @param {object} options - The optional renderer parameters
* @param {HTMLCanvasElement} options.view - the canvas to use as a view, optional
* @param {boolean} options.antialias=false - sets antialias (only applicable in chrome at the moment)
* @param {boolean} options.autoResize=false - If the render view is automatically resized, default false
* @param {number} options.backgroundColor=0x000000 - The background color of the rendered area (shown if not transparent).
* @param {boolean} options.clearBeforeRender=true - This sets if the CanvasRenderer will clear the canvas or not before the new render pass.
* @param {number} options.resolution=1 - The resolution / device pixel ratio of the renderer. The resolution of the renderer retina would be 2.
* @param {boolean} options.roundPixels=false - If true Tiny will Math.floor() x/y values when rendering, stopping pixel interpolation.
* @param {boolean} options.transparent=false - If the render view is transparent, default false
*/
constructor(system, width, height, options) {
super();
options = Object.assign({
width,
height,
}, options);
// Add the default render options
options = Object.assign({}, settings.RENDER_OPTIONS, options);
/**
* The supplied constructor options.
*
* @member {Object}
* @readOnly
*/
this.options = options;
// console.log(options);
/**
* The type of the renderer.
*
* @member {number}
* @default Tiny.RENDERER_TYPE.UNKNOWN
* @see Tiny.RENDERER_TYPE
*/
this.type = RENDERER_TYPE.UNKNOWN;
/**
* Measurements of the screen. (0, 0, screenWidth, screenHeight)
*
* Its safe to use as filterArea or hitArea for whole stage
*
* @member {Tiny.Rectangle}
*/
this.screen = new Rectangle(0, 0, options.width, options.height);
/**
* The canvas element that everything is drawn to
*
* @member {HTMLCanvasElement}
*/
this.view = options.view || document.createElement('canvas');
/**
* The resolution / device pixel ratio of the renderer
*
* @member {number}
* @default 1
*/
this.resolution = options.resolution || settings.RESOLUTION;
/**
* Whether the render view is transparent
*
* @member {boolean}
*/
this.transparent = options.transparent;
/**
* Whether css dimensions of canvas view should be resized to screen dimensions automatically
*
* @member {boolean}
*/
this.autoResize = options.autoResize || false;
/**
* Tracks the blend modes useful for this renderer.
*
* @member {object<string, mixed>}
*/
this.blendModes = null;
/**
* The value of the preserveDrawingBuffer flag affects whether or not the contents of
* the stencil buffer is retained after rendering.
*
* @member {boolean}
*/
this.preserveDrawingBuffer = options.preserveDrawingBuffer;
/**
* This sets if the CanvasRenderer will clear the canvas or not before the new render pass.
* If the scene is NOT transparent Tiny will use a canvas sized fillRect operation every
* frame to set the canvas background color. If the scene is transparent Tiny will use clearRect
* to clear the canvas every frame. Disable this by setting this to false. For example if
* your game has a canvas filling background image you often don't need this set.
*
* @member {boolean}
* @default
*/
this.clearBeforeRender = options.clearBeforeRender;
/**
* If true Tiny will Math.floor() x/y values when rendering, stopping pixel interpolation.
* Handy for crisp pixel art and speed on legacy devices.
*
* @member {boolean}
*/
this.roundPixels = options.roundPixels;
/**
* The background color as a number.
*
* @member {number}
* @private
*/
this._backgroundColor = 0x000000;
/**
* The background color as an [R, G, B] array.
*
* @member {number[]}
* @private
*/
this._backgroundColorRgba = [0, 0, 0, 0];
/**
* The background color as a string.
*
* @member {string}
* @private
*/
this._backgroundColorString = '#000000';
this.backgroundColor = options.backgroundColor || this._backgroundColor; // run bg color setter
/**
* This temporary display object used as the parent of the currently being rendered item
*
* @member {Tiny.DisplayObject}
* @private
*/
this._tempDisplayObjectParent = new Container();
/**
* The last root object that the renderer tried to render.
*
* @member {Tiny.DisplayObject}
* @private
*/
this._lastObjectRendered = this._tempDisplayObjectParent;
}
/**
* Same as view.width, actual number of pixels in the canvas by horizontal
*
* @member {number}
* @readonly
* @default 800
*/
get width() {
return this.view.width;
}
/**
* Same as view.height, actual number of pixels in the canvas by vertical
*
* @member {number}
* @readonly
* @default 600
*/
get height() {
return this.view.height;
}
/**
* Resizes the screen and canvas to the specified width and height
* Canvas dimensions are multiplied by resolution
*
* @param {number} screenWidth - the new width of the screen
* @param {number} screenHeight - the new height of the screen
*/
resize(screenWidth, screenHeight) {
this.screen.width = screenWidth;
this.screen.height = screenHeight;
this.view.width = screenWidth * this.resolution;
this.view.height = screenHeight * this.resolution;
if (this.autoResize) {
this.view.style.width = `${screenWidth}px`;
this.view.style.height = `${screenHeight}px`;
WIN_SIZE.width = Math.round(this.width);
WIN_SIZE.height = Math.round(this.height);
}
}
/**
* Useful function that returns a texture of the display object that can then be used to create sprites
* This can be quite useful if your displayObject is complicated and needs to be reused multiple times.
*
* @param {Tiny.DisplayObject} displayObject - The displayObject the object will be generated from
* @param {number} scaleMode - Should be one of the scaleMode consts
* @param {number} resolution - The resolution / device pixel ratio of the texture being generated
* @return {Tiny.Texture} a texture of the graphics object
*/
generateTexture(displayObject, scaleMode, resolution) {
const bounds = displayObject.getLocalBounds();
const renderTexture = RenderTexture.create(bounds.width | 0, bounds.height | 0, scaleMode, resolution);
tempMatrix.tx = -bounds.x;
tempMatrix.ty = -bounds.y;
this.render(displayObject, renderTexture, false, tempMatrix, true);
return renderTexture;
}
/**
* Removes everything from the renderer and optionally removes the Canvas DOM element.
*
* @param {boolean} [removeView=false] - Removes the Canvas element from the DOM.
*/
destroy(removeView) {
if (removeView && this.view.parentNode) {
this.view.parentNode.removeChild(this.view);
}
this.type = RENDERER_TYPE.UNKNOWN;
this.view = null;
this.screen = null;
this.resolution = 0;
this.transparent = false;
this.autoResize = false;
this.blendModes = null;
this.options = null;
this.preserveDrawingBuffer = false;
this.clearBeforeRender = false;
this.roundPixels = false;
this._backgroundColor = 0;
this._backgroundColorRgba = null;
this._backgroundColorString = null;
this.backgroundColor = 0;
this._tempDisplayObjectParent = null;
this._lastObjectRendered = null;
}
/**
* The background color to fill if not transparent
*
* @member {number}
*/
get backgroundColor() {
return this._backgroundColor;
}
set backgroundColor(value) {
this._backgroundColor = value;
this._backgroundColorString = hex2string(value);
hex2rgb(value, this._backgroundColorRgba);
}
}