183 lines
5.1 KiB
JavaScript
183 lines
5.1 KiB
JavaScript
importScripts('rlottie-wasm.js');
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function RLottieItem(reqId, jsString, width, height, fps) {
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this.stringOnWasmHeap = null;
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this.handle = null;
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this.frameCount = 0;
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this.reqId = reqId;
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this.width = width;
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this.height = height;
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this.fps = Math.max(1, Math.min(60, fps || 60));
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this.dead = false;
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this.init(jsString, width, height);
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reply('loaded', this.reqId, this.frameCount, this.fps);
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}
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RLottieItem.prototype.init = function(jsString) {
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try {
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this.handle = RLottieWorker.Api.init();
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this.stringOnWasmHeap = allocate(intArrayFromString(jsString), 'i8', 0);
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this.frameCount = RLottieWorker.Api.loadFromData(this.handle, this.stringOnWasmHeap);
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RLottieWorker.Api.resize(this.handle, this.width, this.height);
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} catch(e) {
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console.error('init RLottieItem error:', e);
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}
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};
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RLottieItem.prototype.render = function(frameNo, clamped) {
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if(this.dead) return;
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//return;
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if(this.frameCount < frameNo || frameNo < 0) {
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return;
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}
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try {
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RLottieWorker.Api.render(this.handle, frameNo);
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var bufferPointer = RLottieWorker.Api.buffer(this.handle);
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var data = Module.HEAPU8.subarray(bufferPointer, bufferPointer + (this.width * this.height * 4));
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if(!clamped) {
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clamped = new Uint8ClampedArray(data);
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} else {
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clamped.set(data);
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}
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reply('frame', this.reqId, frameNo, clamped);
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} catch(e) {
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console.error('Render error:', e);
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this.dead = true;
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}
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};
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RLottieItem.prototype.destroy = function() {
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this.dead = true;
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RLottieWorker.Api.destroy(this.handle);
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};
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var RLottieWorker = (function() {
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var worker = {};
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worker.Api = {};
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//worker.lottieHandle = null;
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function initApi() {
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worker.Api = {
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init: Module.cwrap('lottie_init', '', []),
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destroy: Module.cwrap('lottie_destroy', '', ['number']),
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resize: Module.cwrap('lottie_resize', '', ['number', 'number', 'number']),
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buffer: Module.cwrap('lottie_buffer', 'number', ['number']),
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render: Module.cwrap('lottie_render', '', ['number', 'number']),
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loadFromData: Module.cwrap('lottie_load_from_data', 'number', ['number', 'number']),
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};
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}
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worker.init = function() {
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initApi();
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reply('ready');
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};
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return worker;
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}());
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Module.onRuntimeInitialized = function() {
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RLottieWorker.init();
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};
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var items = {};
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var queryableFunctions = {
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loadFromData: function(reqId, jsString, width, height) {
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try {
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var json_parsed = jsString;//JSON.parse(jsString);
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if(!json_parsed.tgs) {
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throw new Error('Invalid file');
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}
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items[reqId] = new RLottieItem(reqId, JSON.stringify(jsString), width, height, json_parsed.fr);
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} catch(e) {}
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},
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destroy: function(reqId) {
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items[reqId].destroy();
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delete items[reqId];
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},
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renderFrame: function(reqId, frameNo, clamped) {
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//console.log('worker renderFrame', reqId, frameNo, clamped);
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items[reqId].render(frameNo, clamped);
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}
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};
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function defaultReply(message) {
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// your default PUBLIC function executed only when main page calls the queryableWorker.postMessage() method directly
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// do something
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}
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/**
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* Returns true when run in WebKit derived browsers.
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* This is used as a workaround for a memory leak in Safari caused by using Transferable objects to
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* transfer data between WebWorkers and the main thread.
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* https://github.com/mapbox/mapbox-gl-js/issues/8771
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*
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* This should be removed once the underlying Safari issue is fixed.
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*
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* @private
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* @param scope {WindowOrWorkerGlobalScope} Since this function is used both on the main thread and WebWorker context,
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* let the calling scope pass in the global scope object.
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* @returns {boolean}
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*/
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var _isSafari = null;
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function isSafari(scope) {
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if(_isSafari == null) {
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var userAgent = scope.navigator ? scope.navigator.userAgent : null;
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_isSafari = !!scope.safari ||
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!!(userAgent && (/\b(iPad|iPhone|iPod)\b/.test(userAgent) || (!!userAgent.match('Safari') && !userAgent.match('Chrome'))));
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}
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return _isSafari;
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}
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function reply() {
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if(arguments.length < 1) {
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throw new TypeError('reply - not enough arguments');
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}
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//if(arguments[0] == 'frame') return;
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var args = Array.prototype.slice.call(arguments, 1);
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if(isSafari(self)) {
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postMessage({ 'queryMethodListener': arguments[0], 'queryMethodArguments': args });
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} else {
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var transfer = [];
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for(var i = 0; i < args.length; i++) {
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if(args[i] instanceof ArrayBuffer) {
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transfer.push(args[i]);
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}
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if(args[i].buffer && args[i].buffer instanceof ArrayBuffer) {
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transfer.push(args[i].buffer);
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//args[i] = args[i].buffer;
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}
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}
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postMessage({ 'queryMethodListener': arguments[0], 'queryMethodArguments': args }, transfer);
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}
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//postMessage({ 'queryMethodListener': arguments[0], 'queryMethodArguments': Array.prototype.slice.call(arguments, 1) });
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//console.error(transfer, args);
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}
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onmessage = function(oEvent) {
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if(oEvent.data instanceof Object && oEvent.data.hasOwnProperty('queryMethod') && oEvent.data.hasOwnProperty('queryMethodArguments')) {
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queryableFunctions[oEvent.data.queryMethod].apply(self, oEvent.data.queryMethodArguments);
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} else {
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defaultReply(oEvent.data);
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}
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};
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