'use strict';
exports.__esModule = true;
var _core = require('../core');
var core = _interopRequireWildcard(_core);
var _CountLimiter = require('./limiters/CountLimiter');
var _CountLimiter2 = _interopRequireDefault(_CountLimiter);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
var SharedTicker = core.ticker.shared;
var DEFAULT_UPLOADS_PER_FRAME = 4;
/**
* The prepare manager provides functionality to upload content to the GPU. BasePrepare handles
* basic queuing functionality and is extended by {@link PIXI.prepare.WebGLPrepare} and {@link PIXI.prepare.CanvasPrepare}
* to provide preparation capabilities specific to their respective renderers.
*
* @abstract
* @class
* @memberof PIXI
*/
var BasePrepare = function () {
/**
* @param {PIXI.SystemRenderer} renderer - A reference to the current renderer
*/
function BasePrepare(renderer) {
var _this = this;
_classCallCheck(this, BasePrepare);
/**
* The limiter to be used to control how quickly items are prepared.
* @type {PIXI.prepare.CountLimiter|PIXI.prepare.TimeLimiter}
*/
this.limiter = new _CountLimiter2.default(DEFAULT_UPLOADS_PER_FRAME);
/**
* Reference to the renderer.
* @type {PIXI.SystemRenderer}
* @protected
*/
this.renderer = renderer;
/**
* The only real difference between CanvasPrepare and WebGLPrepare is what they pass
* to upload hooks. That different parameter is stored here.
* @type {PIXI.prepare.CanvasPrepare|PIXI.WebGLRenderer}
* @protected
*/
this.uploadHookHelper = null;
/**
* Collection of items to uploads at once.
* @type {Array<*>}
* @private
*/
this.queue = [];
/**
* Collection of additional hooks for finding assets.
* @type {Array<Function>}
* @private
*/
this.addHooks = [];
/**
* Collection of additional hooks for processing assets.
* @type {Array<Function>}
* @private
*/
this.uploadHooks = [];
/**
* Callback to call after completed.
* @type {Array<Function>}
* @private
*/
this.completes = [];
/**
* If prepare is ticking (running).
* @type {boolean}
* @private
*/
this.ticking = false;
/**
* 'bound' call for prepareItems().
* @type {Function}
* @private
*/
this.delayedTick = function () {
// unlikely, but in case we were destroyed between tick() and delayedTick()
if (!_this.queue) {
return;
}
_this.prepareItems();
};
this.register(findText, drawText);
this.register(findTextStyle, calculateTextStyle);
}
/**
* Upload all the textures and graphics to the GPU.
*
* @param {Function|PIXI.DisplayObject|PIXI.Container} item - Either
* the container or display object to search for items to upload or
* the callback function, if items have been added using `prepare.add`.
* @param {Function} [done] - Optional callback when all queued uploads have completed
*/
BasePrepare.prototype.upload = function upload(item, done) {
if (typeof item === 'function') {
done = item;
item = null;
}
// If a display object, search for items
// that we could upload
if (item) {
this.add(item);
}
// Get the items for upload from the display
if (this.queue.length) {
if (done) {
this.completes.push(done);
}
if (!this.ticking) {
this.ticking = true;
SharedTicker.addOnce(this.tick, this);
}
} else if (done) {
done();
}
};
/**
* Handle tick update
*
* @private
*/
BasePrepare.prototype.tick = function tick() {
setTimeout(this.delayedTick, 0);
};
/**
* Actually prepare items. This is handled outside of the tick because it will take a while
* and we do NOT want to block the current animation frame from rendering.
*
* @private
*/
BasePrepare.prototype.prepareItems = function prepareItems() {
this.limiter.beginFrame();
// Upload the graphics
while (this.queue.length && this.limiter.allowedToUpload()) {
var item = this.queue[0];
var uploaded = false;
for (var i = 0, len = this.uploadHooks.length; i < len; i++) {
if (this.uploadHooks[i](this.uploadHookHelper, item)) {
this.queue.shift();
uploaded = true;
break;
}
}
if (!uploaded) {
this.queue.shift();
}
}
// We're finished
if (!this.queue.length) {
this.ticking = false;
var completes = this.completes.slice(0);
this.completes.length = 0;
for (var _i = 0, _len = completes.length; _i < _len; _i++) {
completes[_i]();
}
} else {
// if we are not finished, on the next rAF do this again
SharedTicker.addOnce(this.tick, this);
}
};
/**
* Adds hooks for finding and uploading items.
*
* @param {Function} [addHook] - Function call that takes two parameters: `item:*, queue:Array`
function must return `true` if it was able to add item to the queue.
* @param {Function} [uploadHook] - Function call that takes two parameters: `prepare:CanvasPrepare, item:*` and
* function must return `true` if it was able to handle upload of item.
* @return {PIXI.CanvasPrepare} Instance of plugin for chaining.
*/
BasePrepare.prototype.register = function register(addHook, uploadHook) {
if (addHook) {
this.addHooks.push(addHook);
}
if (uploadHook) {
this.uploadHooks.push(uploadHook);
}
return this;
};
/**
* Manually add an item to the uploading queue.
*
* @param {PIXI.DisplayObject|PIXI.Container|*} item - Object to add to the queue
* @return {PIXI.CanvasPrepare} Instance of plugin for chaining.
*/
BasePrepare.prototype.add = function add(item) {
// Add additional hooks for finding elements on special
// types of objects that
for (var i = 0, len = this.addHooks.length; i < len; i++) {
if (this.addHooks[i](item, this.queue)) {
break;
}
}
// Get childen recursively
if (item instanceof core.Container) {
for (var _i2 = item.children.length - 1; _i2 >= 0; _i2--) {
this.add(item.children[_i2]);
}
}
return this;
};
/**
* Destroys the plugin, don't use after this.
*
*/
BasePrepare.prototype.destroy = function destroy() {
if (this.ticking) {
SharedTicker.remove(this.tick, this);
}
this.ticking = false;
this.addHooks = null;
this.uploadHooks = null;
this.renderer = null;
this.completes = null;
this.queue = null;
this.limiter = null;
this.uploadHookHelper = null;
};
return BasePrepare;
}();
/**
* Built-in hook to draw PIXI.Text to its texture.
*
* @private
* @param {PIXI.WebGLRenderer|PIXI.CanvasPrepare} helper - Not used by this upload handler
* @param {PIXI.DisplayObject} item - Item to check
* @return {boolean} If item was uploaded.
*/
exports.default = BasePrepare;
function drawText(helper, item) {
if (item instanceof core.Text) {
// updating text will return early if it is not dirty
item.updateText(true);
return true;
}
return false;
}
/**
* Built-in hook to calculate a text style for a PIXI.Text object.
*
* @private
* @param {PIXI.WebGLRenderer|PIXI.CanvasPrepare} helper - Not used by this upload handler
* @param {PIXI.DisplayObject} item - Item to check
* @return {boolean} If item was uploaded.
*/
function calculateTextStyle(helper, item) {
if (item instanceof core.TextStyle) {
var font = core.Text.getFontStyle(item);
if (!core.Text.fontPropertiesCache[font]) {
core.Text.calculateFontProperties(font);
}
return true;
}
return false;
}
/**
* Built-in hook to find Text objects.
*
* @private
* @param {PIXI.DisplayObject} item - Display object to check
* @param {Array<*>} queue - Collection of items to upload
* @return {boolean} if a PIXI.Text object was found.
*/
function findText(item, queue) {
if (item instanceof core.Text) {
// push the text style to prepare it - this can be really expensive
if (queue.indexOf(item.style) === -1) {
queue.push(item.style);
}
// also push the text object so that we can render it (to canvas/texture) if needed
if (queue.indexOf(item) === -1) {
queue.push(item);
}
// also push the Text's texture for upload to GPU
var texture = item._texture.baseTexture;
if (queue.indexOf(texture) === -1) {
queue.push(texture);
}
return true;
}
return false;
}
/**
* Built-in hook to find TextStyle objects.
*
* @private
* @param {PIXI.TextStyle} item - Display object to check
* @param {Array<*>} queue - Collection of items to upload
* @return {boolean} if a PIXI.TextStyle object was found.
*/
function findTextStyle(item, queue) {
if (item instanceof core.TextStyle) {
if (queue.indexOf(item) === -1) {
queue.push(item);
}
return true;
}
return false;
}
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