@esotericsoftware/spine-webgl
Version:
The official Spine Runtimes for the web.
113 lines • 17.3 kB
JavaScript
/******************************************************************************
* Spine Runtimes License Agreement
* Last updated April 5, 2025. Replaces all prior versions.
*
* Copyright (c) 2013-2025, 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 { TimeKeeper, AssetManager, ManagedWebGLRenderingContext, SceneRenderer, Input } from "./index.js";
/** Manages the life-cycle and WebGL context of a {@link SpineCanvasApp}. The app loads
* assets and initializes itself, then updates and renders its state at the screen refresh rate. */
export class SpineCanvas {
config;
context;
/** Tracks the current time, delta, and other time related statistics. */
time = new TimeKeeper();
/** The HTML canvas to render to. */
htmlCanvas;
/** The WebGL rendering context. */
gl;
/** The scene renderer for easy drawing of skeletons, shapes, and images. */
renderer;
/** The asset manager to load assets with. */
assetManager;
/** The input processor used to listen to mouse, touch, and keyboard events. */
input;
disposed = false;
/** Constructs a new spine canvas, rendering to the provided HTML canvas. */
constructor(canvas, config) {
this.config = config;
if (!config.pathPrefix)
config.pathPrefix = "";
if (!config.app)
config.app = {
loadAssets: () => { },
initialize: () => { },
update: () => { },
render: () => { },
error: () => { },
dispose: () => { },
};
if (!config.webglConfig)
config.webglConfig = { alpha: true };
this.htmlCanvas = canvas;
this.context = new ManagedWebGLRenderingContext(canvas, config.webglConfig);
this.renderer = new SceneRenderer(canvas, this.context);
this.gl = this.context.gl;
this.assetManager = new AssetManager(this.context, config.pathPrefix);
this.input = new Input(canvas);
if (config.app.loadAssets)
config.app.loadAssets(this);
let loop = () => {
if (this.disposed)
return;
requestAnimationFrame(loop);
this.time.update();
if (config.app.update)
config.app.update(this, this.time.delta);
if (config.app.render)
config.app.render(this);
};
let waitForAssets = () => {
if (this.disposed)
return;
if (this.assetManager.isLoadingComplete()) {
if (this.assetManager.hasErrors()) {
if (config.app.error)
config.app.error(this, this.assetManager.getErrors());
}
else {
if (config.app.initialize)
config.app.initialize(this);
loop();
}
return;
}
requestAnimationFrame(waitForAssets);
};
requestAnimationFrame(waitForAssets);
}
/** Clears the canvas with the given color. The color values are given in the range [0,1]. */
clear(r, g, b, a) {
this.gl.clearColor(r, g, b, a);
this.gl.clear(this.gl.COLOR_BUFFER_BIT);
}
/** Disposes the app, so the update() and render() functions are no longer called. Calls the dispose() callback.*/
dispose() {
if (this.config.app.dispose)
this.config.app.dispose(this);
this.disposed = true;
}
}
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Replaces all prior versions.\n *\n * Copyright (c) 2013-2025, Esoteric Software LLC\n *\n * Integration of the Spine Runtimes into software or otherwise creating\n * derivative works of the Spine Runtimes is permitted under the terms and\n * conditions of Section 2 of the Spine Editor License Agreement:\n * http://esotericsoftware.com/spine-editor-license\n *\n * Otherwise, it is permitted to integrate the Spine Runtimes into software\n * or otherwise create derivative works of the Spine Runtimes (collectively,\n * \"Products\"), provided that each user of the Products must obtain their own\n * Spine Editor license and redistribution of the Products in any form must\n * include this license and copyright notice.\n *\n * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC \"AS IS\" AND ANY\n * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n * DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY\n * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,\n * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND\n * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\n * THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n *****************************************************************************/\n\nimport { TimeKeeper, AssetManager, ManagedWebGLRenderingContext, SceneRenderer, Input, StringMap } from \"./index.js\";\n\n/** An app running inside a {@link SpineCanvas}. The app life-cycle\n * is as follows:\n *\n * 1. `loadAssets()` is called. The app can queue assets for loading via {@link SpineCanvas.assetManager}.\n * 2. `initialize()` is called when all assets are loaded. The app can setup anything it needs to enter the main application logic.\n * 3. `update()` is called periodically at screen refresh rate. The app can update its state.\n * 4. `render()` is called periodically at screen refresh rate. The app can render its state via {@link SpineCanvas.renderer} or directly via the WebGL context in {@link SpineCanvas.gl}.\n *\n * The `error()` method is called in case the assets could not be loaded. The `dispose()` method is called in case the canvas has been disposed via {@link SpineCanvas.dispose}.\n */\nexport interface SpineCanvasApp {\n\tloadAssets?(canvas: SpineCanvas): void;\n\tinitialize?(canvas: SpineCanvas): void;\n\tupdate?(canvas: SpineCanvas, delta: number): void;\n\trender?(canvas: SpineCanvas): void;\n\terror?(canvas: SpineCanvas, errors: StringMap<string>): void;\n\tdispose?(canvas: SpineCanvas): void;\n}\n\n/** Configuration passed to the {@link SpineCanvas} constructor */\nexport interface SpineCanvasConfig {\n\t/* The {@link SpineCanvasApp} to be run in the canvas. */\n\tapp: SpineCanvasApp;\n\t/* The path prefix to be used by the {@link AssetManager}. */\n\tpathPrefix?: string;\n\t/* The WebGL context configuration */\n\twebglConfig?: any;\n}\n\n/** Manages the life-cycle and WebGL context of a {@link SpineCanvasApp}. The app loads\n * assets and initializes itself, then updates and renders its state at the screen refresh rate. */\nexport class SpineCanvas {\n\treadonly context: ManagedWebGLRenderingContext;\n\n\t/** Tracks the current time, delta, and other time related statistics. */\n\treadonly time = new TimeKeeper();\n\t/** The HTML canvas to render to. */\n\treadonly htmlCanvas: HTMLCanvasElement;\n\t/** The WebGL rendering context. */\n\treadonly gl: WebGLRenderingContext;\n\t/** The scene renderer for easy drawing of skeletons, shapes, and images. */\n\treadonly renderer: SceneRenderer;\n\t/** The asset manager to load assets with. */\n\treadonly assetManager: AssetManager;\n\t/** The input processor used to listen to mouse, touch, and keyboard events. */\n\treadonly input: Input;\n\n\tprivate disposed = false;\n\n\t/** Constructs a new spine canvas, rendering to the provided HTML canvas. */\n\tconstructor (canvas: HTMLCanvasElement, private config: SpineCanvasConfig) {\n\t\tif (!config.pathPrefix) config.pathPrefix = \"\";\n\t\tif (!config.app) config.app = {\n\t\t\tloadAssets: () => { },\n\t\t\tinitialize: () => { },\n\t\t\tupdate: () => { },\n\t\t\trender: () => { },\n\t\t\terror: () => { },\n\t\t\tdispose: () => { },\n\t\t}\n\t\tif (!config.webglConfig) config.webglConfig = { alpha: true };\n\n\t\tthis.htmlCanvas = canvas;\n\t\tthis.context = new ManagedWebGLRenderingContext(canvas, config.webglConfig);\n\t\tthis.renderer = new SceneRenderer(canvas, this.context);\n\t\tthis.gl = this.context.gl;\n\t\tthis.assetManager = new AssetManager(this.context, config.pathPrefix);\n\t\tthis.input = new Input(canvas);\n\n\t\tif (config.app.loadAssets) config.app.loadAssets(this);\n\n\t\tlet loop = () => {\n\t\t\tif (this.disposed) return;\n\t\t\trequestAnimationFrame(loop);\n\t\t\tthis.time.update();\n\t\t\tif (config.app.update) config.app.update(this, this.time.delta);\n\t\t\tif (config.app.render) config.app.render(this);\n\t\t}\n\n\t\tlet waitForAssets = () => {\n\t\t\tif (this.disposed) return;\n\t\t\tif (this.assetManager.isLoadingComplete()) {\n\t\t\t\tif (this.assetManager.hasErrors()) {\n\t\t\t\t\tif (config.app.error) config.app.error(this, this.assetManager.getErrors());\n\t\t\t\t} else {\n\t\t\t\t\tif (config.app.initialize) config.app.initialize(this);\n\t\t\t\t\tloop();\n\t\t\t\t}\n\t\t\t\treturn;\n\t\t\t}\n\t\t\trequestAnimationFrame(waitForAssets);\n\t\t}\n\t\trequestAnimationFrame(waitForAssets);\n\t}\n\n\t/** Clears the canvas with the given color. The color values are given in the range [0,1]. */\n\tclear (r: number, g: number, b: number, a: number) {\n\t\tthis.gl.clearColor(r, g, b, a);\n\t\tthis.gl.clear(this.gl.COLOR_BUFFER_BIT);\n\t}\n\n\t/** Disposes the app, so the update() and render() functions are no longer called. Calls the dispose() callback.*/\n\tdispose () {\n\t\tif (this.config.app.dispose) this.config.app.dispose(this);\n\t\tthis.disposed = true;\n\t}\n}\n"]}