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AssetManagerBase.ts
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AssetManagerBase.ts
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/******************************************************************************
* Spine Runtimes License Agreement
* Last updated January 1, 2020. Replaces all prior versions.
*
* Copyright (c) 2013-2020, Esoteric Software LLC
*
* Integration of the Spine Runtimes into software or otherwise creating
* derivative works of the Spine Runtimes is permitted under the terms and
* conditions of Section 2 of the Spine Editor License Agreement:
* http://esotericsoftware.com/spine-editor-license
*
* Otherwise, it is permitted to integrate the Spine Runtimes into software
* or otherwise create derivative works of the Spine Runtimes (collectively,
* "Products"), provided that each user of the Products must obtain their own
* Spine Editor license and redistribution of the Products in any form must
* include this license and copyright notice.
*
* THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
* BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
import { Texture } from "./Texture";
import { TextureAtlas } from "./TextureAtlas";
import { Disposable, StringMap } from "./Utils";
export class AssetManagerBase implements Disposable {
private pathPrefix: string = null;
private textureLoader: (image: HTMLImageElement | ImageBitmap) => Texture;
private downloader: Downloader;
private assets: StringMap<any> = {};
private errors: StringMap<string> = {};
private toLoad = 0;
private loaded = 0;
constructor (textureLoader: (image: HTMLImageElement | ImageBitmap) => Texture, pathPrefix: string = "", downloader: Downloader = null) {
this.textureLoader = textureLoader;
this.pathPrefix = pathPrefix;
this.downloader = downloader || new Downloader();
}
private start (path: string): string {
this.toLoad++;
return this.pathPrefix + path;
}
private success (callback: (path: string, data: any) => void, path: string, asset: any) {
this.toLoad--;
this.loaded++;
this.assets[path] = asset;
if (callback) callback(path, asset);
}
private error (callback: (path: string, message: string) => void, path: string, message: string) {
this.toLoad--;
this.loaded++;
this.errors[path] = message;
if (callback) callback(path, message);
}
loadAll () {
let promise = new Promise((resolve: (assetManager: AssetManagerBase) => void, reject: (errors: StringMap<string>) => void) => {
let check = () => {
if (this.isLoadingComplete()) {
if (this.hasErrors()) reject(this.errors);
else resolve(this);
return;
}
requestAnimationFrame(check);
}
requestAnimationFrame(check);
});
return promise;
}
setRawDataURI (path: string, data: string) {
this.downloader.rawDataUris[this.pathPrefix + path] = data;
}
loadBinary (path: string,
success: (path: string, binary: Uint8Array) => void = null,
error: (path: string, message: string) => void = null) {
path = this.start(path);
this.downloader.downloadBinary(path, (data: Uint8Array): void => {
this.success(success, path, data);
}, (status: number, responseText: string): void => {
this.error(error, path, `Couldn't load binary ${path}: status ${status}, ${responseText}`);
});
}
loadText (path: string,
success: (path: string, text: string) => void = null,
error: (path: string, message: string) => void = null) {
path = this.start(path);
this.downloader.downloadText(path, (data: string): void => {
this.success(success, path, data);
}, (status: number, responseText: string): void => {
this.error(error, path, `Couldn't load text ${path}: status ${status}, ${responseText}`);
});
}
loadJson (path: string,
success: (path: string, object: object) => void = null,
error: (path: string, message: string) => void = null) {
path = this.start(path);
this.downloader.downloadJson(path, (data: object): void => {
this.success(success, path, data);
}, (status: number, responseText: string): void => {
this.error(error, path, `Couldn't load JSON ${path}: status ${status}, ${responseText}`);
});
}
loadTexture (path: string,
success: (path: string, texture: Texture) => void = null,
error: (path: string, message: string) => void = null) {
path = this.start(path);
let isBrowser = !!(typeof window !== 'undefined' && typeof navigator !== 'undefined' && window.document);
let isWebWorker = !isBrowser; // && typeof importScripts !== 'undefined';
if (isWebWorker) {
fetch(path, { mode: <RequestMode>"cors" }).then((response) => {
if (response.ok) return response.blob();
this.error(error, path, `Couldn't load image: ${path}`);
return null;
}).then((blob) => {
return blob ? createImageBitmap(blob, { premultiplyAlpha: "none", colorSpaceConversion: "none" }) : null;
}).then((bitmap) => {
if (bitmap) this.success(success, path, this.textureLoader(bitmap));
});
} else {
let image = new Image();
image.crossOrigin = "anonymous";
image.onload = () => {
this.success(success, path, this.textureLoader(image));
};
image.onerror = () => {
this.error(error, path, `Couldn't load image: ${path}`);
};
if (this.downloader.rawDataUris[path]) path = this.downloader.rawDataUris[path];
image.src = path;
}
}
loadTextureAtlas (path: string,
success: (path: string, atlas: TextureAtlas) => void = null,
error: (path: string, message: string) => void = null,
fileAlias: { [keyword: string]: string } = null
) {
let index = path.lastIndexOf("/");
let parent = index >= 0 ? path.substring(0, index + 1) : "";
path = this.start(path);
this.downloader.downloadText(path, (atlasText: string): void => {
try {
let atlas = new TextureAtlas(atlasText);
let toLoad = atlas.pages.length, abort = false;
for (let page of atlas.pages) {
this.loadTexture(fileAlias == null ? parent + page.name : fileAlias[page.name],
(imagePath: string, texture: Texture) => {
if (!abort) {
page.setTexture(texture);
if (--toLoad == 0) this.success(success, path, atlas);
}
},
(imagePath: string, message: string) => {
if (!abort) this.error(error, path, `Couldn't load texture atlas ${path} page image: ${imagePath}`);
abort = true;
}
);
}
} catch (e) {
this.error(error, path, `Couldn't parse texture atlas ${path}: ${e.message}`);
}
}, (status: number, responseText: string): void => {
this.error(error, path, `Couldn't load texture atlas ${path}: status ${status}, ${responseText}`);
});
}
get (path: string) {
return this.assets[this.pathPrefix + path];
}
require (path: string) {
path = this.pathPrefix + path;
let asset = this.assets[path];
if (asset) return asset;
let error = this.errors[path];
throw Error("Asset not found: " + path + (error ? "\n" + error : ""));
}
remove (path: string) {
path = this.pathPrefix + path;
let asset = this.assets[path];
if ((<any>asset).dispose) (<any>asset).dispose();
delete this.assets[path];
return asset;
}
removeAll () {
for (let key in this.assets) {
let asset = this.assets[key];
if ((<any>asset).dispose) (<any>asset).dispose();
}
this.assets = {};
}
isLoadingComplete (): boolean {
return this.toLoad == 0;
}
getToLoad (): number {
return this.toLoad;
}
getLoaded (): number {
return this.loaded;
}
dispose () {
this.removeAll();
}
hasErrors () {
return Object.keys(this.errors).length > 0;
}
getErrors () {
return this.errors;
}
}
export class Downloader {
private callbacks: StringMap<Array<Function>> = {};
rawDataUris: StringMap<string> = {};
dataUriToString (dataUri: string) {
if (!dataUri.startsWith("data:")) {
throw new Error("Not a data URI.");
}
let base64Idx = dataUri.indexOf("base64,");
if (base64Idx != -1) {
base64Idx += "base64,".length;
return atob(dataUri.substr(base64Idx));
} else {
return dataUri.substr(dataUri.indexOf(",") + 1);
}
}
base64ToUint8Array (base64: string) {
var binary_string = window.atob(base64);
var len = binary_string.length;
var bytes = new Uint8Array(len);
for (var i = 0; i < len; i++) {
bytes[i] = binary_string.charCodeAt(i);
}
return bytes;
}
dataUriToUint8Array (dataUri: string) {
if (!dataUri.startsWith("data:")) {
throw new Error("Not a data URI.");
}
let base64Idx = dataUri.indexOf("base64,");
if (base64Idx == -1) throw new Error("Not a binary data URI.");
base64Idx += "base64,".length;
return this.base64ToUint8Array(dataUri.substr(base64Idx));
}
downloadText (url: string, success: (data: string) => void, error: (status: number, responseText: string) => void) {
if (this.start(url, success, error)) return;
if (this.rawDataUris[url]) {
try {
let dataUri = this.rawDataUris[url];
this.finish(url, 200, this.dataUriToString(dataUri));
} catch (e) {
this.finish(url, 400, JSON.stringify(e));
}
return;
}
let request = new XMLHttpRequest();
request.overrideMimeType("text/html");
request.open("GET", url, true);
let done = () => {
this.finish(url, request.status, request.responseText);
};
request.onload = done;
request.onerror = done;
request.send();
}
downloadJson (url: string, success: (data: object) => void, error: (status: number, responseText: string) => void) {
this.downloadText(url, (data: string): void => {
success(JSON.parse(data));
}, error);
}
downloadBinary (url: string, success: (data: Uint8Array) => void, error: (status: number, responseText: string) => void) {
if (this.start(url, success, error)) return;
if (this.rawDataUris[url]) {
try {
let dataUri = this.rawDataUris[url];
this.finish(url, 200, this.dataUriToUint8Array(dataUri));
} catch (e) {
this.finish(url, 400, JSON.stringify(e));
}
return;
}
let request = new XMLHttpRequest();
request.open("GET", url, true);
request.responseType = "arraybuffer";
let onerror = () => {
this.finish(url, request.status, request.response);
};
request.onload = () => {
if (request.status == 200 || request.status == 0)
this.finish(url, 200, new Uint8Array(request.response as ArrayBuffer));
else
onerror();
};
request.onerror = onerror;
request.send();
}
private start (url: string, success: any, error: any) {
let callbacks = this.callbacks[url];
try {
if (callbacks) return true;
this.callbacks[url] = callbacks = [];
} finally {
callbacks.push(success, error);
}
}
private finish (url: string, status: number, data: any) {
let callbacks = this.callbacks[url];
delete this.callbacks[url];
let args = status == 200 || status == 0 ? [data] : [status, data];
for (let i = args.length - 1, n = callbacks.length; i < n; i += 2)
callbacks[i].apply(null, args);
}
}