mirror of
https://github.com/EsotericSoftware/spine-runtimes.git
synced 2026-02-04 14:24:53 +08:00
108 lines
4.4 KiB
TypeScript
108 lines
4.4 KiB
TypeScript
/******************************************************************************
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* Spine Runtimes License Agreement
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* Last updated January 1, 2020. Replaces all prior versions.
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*
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* Copyright (c) 2013-2020, Esoteric Software LLC
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*
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* Integration of the Spine Runtimes into software or otherwise creating
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* derivative works of the Spine Runtimes is permitted under the terms and
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* conditions of Section 2 of the Spine Editor License Agreement:
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* http://esotericsoftware.com/spine-editor-license
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*
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* Otherwise, it is permitted to integrate the Spine Runtimes into software
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* or otherwise create derivative works of the Spine Runtimes (collectively,
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* "Products"), provided that each user of the Products must obtain their own
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* Spine Editor license and redistribution of the Products in any form must
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* include this license and copyright notice.
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*
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* THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
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* BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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import { Restorable, BlendMode } from "@esotericsoftware/spine-core";
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export class ManagedWebGLRenderingContext {
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public canvas: HTMLCanvasElement | OffscreenCanvas;
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public gl: WebGLRenderingContext;
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private restorables = new Array<Restorable>();
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constructor (canvasOrContext: HTMLCanvasElement | WebGLRenderingContext | EventTarget, contextConfig: any = { alpha: "true" }) {
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if (!((canvasOrContext instanceof WebGLRenderingContext) || (typeof WebGL2RenderingContext !== 'undefined' && canvasOrContext instanceof WebGL2RenderingContext)))
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this.setupCanvas(canvasOrContext, contextConfig);
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else {
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this.gl = canvasOrContext;
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this.canvas = this.gl.canvas;
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}
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}
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private setupCanvas (canvas: any, contextConfig: any) {
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this.gl = <WebGLRenderingContext>(canvas.getContext("webgl2", contextConfig) || canvas.getContext("webgl", contextConfig));
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this.canvas = canvas;
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canvas.addEventListener("webglcontextlost", (e: any) => {
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let event = <WebGLContextEvent>e;
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if (e) e.preventDefault();
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});
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canvas.addEventListener("webglcontextrestored", (e: any) => {
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for (let i = 0, n = this.restorables.length; i < n; i++)
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this.restorables[i].restore();
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});
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}
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addRestorable (restorable: Restorable) {
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this.restorables.push(restorable);
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}
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removeRestorable (restorable: Restorable) {
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let index = this.restorables.indexOf(restorable);
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if (index > -1) this.restorables.splice(index, 1);
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}
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}
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const ONE = 1;
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const ONE_MINUS_SRC_COLOR = 0x0301;
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const SRC_ALPHA = 0x0302;
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const ONE_MINUS_SRC_ALPHA = 0x0303;
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const ONE_MINUS_DST_ALPHA = 0x0305;
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const DST_COLOR = 0x0306;
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export class WebGLBlendModeConverter {
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static getDestGLBlendMode (blendMode: BlendMode) {
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switch (blendMode) {
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case BlendMode.Normal: return ONE_MINUS_SRC_ALPHA;
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case BlendMode.Additive: return ONE;
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case BlendMode.Multiply: return ONE_MINUS_SRC_ALPHA;
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case BlendMode.Screen: return ONE_MINUS_SRC_ALPHA;
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default: throw new Error("Unknown blend mode: " + blendMode);
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}
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}
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static getSourceColorGLBlendMode (blendMode: BlendMode, premultipliedAlpha: boolean = false) {
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switch (blendMode) {
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case BlendMode.Normal: return premultipliedAlpha ? ONE : SRC_ALPHA;
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case BlendMode.Additive: return premultipliedAlpha ? ONE : SRC_ALPHA;
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case BlendMode.Multiply: return DST_COLOR;
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case BlendMode.Screen: return ONE;
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default: throw new Error("Unknown blend mode: " + blendMode);
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}
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}
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static getSourceAlphaGLBlendMode (blendMode: BlendMode) {
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switch (blendMode) {
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case BlendMode.Normal: return ONE;
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case BlendMode.Additive: return ONE;
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case BlendMode.Multiply: return ONE_MINUS_SRC_ALPHA;
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case BlendMode.Screen: return ONE_MINUS_SRC_COLOR;
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default: throw new Error("Unknown blend mode: " + blendMode);
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}
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}
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}
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