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handle webgl context loss/restore

This commit is contained in:
Haowei Wen 2021-09-19 13:17:52 +08:00
parent f60abb91da
commit 7e3c0025e3
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GPG Key ID: 5BC167F73EA558E4
1 changed files with 39 additions and 8 deletions
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47
src/viewer.ts
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@ -65,6 +65,10 @@ export class SkinViewer {
private _disposed: boolean = false;
private _renderPaused: boolean = false;
private animationID: number | null;
private onContextLost: (event: Event) => void;
private onContextRestored: () => void;
constructor(options: SkinViewerOptions = {}) {
this.canvas = options.canvas === undefined ? document.createElement("canvas") : options.canvas;
@ -115,9 +119,27 @@ export class SkinViewer {
if (options.renderPaused === true) {
this._renderPaused = true;
this.animationID = null;
} else {
window.requestAnimationFrame(() => this.draw());
this.animationID = window.requestAnimationFrame(() => this.draw());
}
this.onContextLost = (event: Event) => {
event.preventDefault();
if (this.animationID !== null) {
window.cancelAnimationFrame(this.animationID);
this.animationID = null;
}
};
this.onContextRestored = () => {
if (!this._renderPaused && !this._disposed && this.animationID === null) {
this.animationID = window.requestAnimationFrame(() => this.draw());
}
};
this.canvas.addEventListener("webglcontextlost", this.onContextLost, false);
this.canvas.addEventListener("webglcontextrestored", this.onContextRestored, false);
}
loadSkin(empty: null): void;
@ -179,12 +201,9 @@ export class SkinViewer {
}
private draw(): void {
if (this.disposed || this._renderPaused) {
return;
}
this.animations.runAnimationLoop(this.playerObject);
this.render();
window.requestAnimationFrame(() => this.draw());
this.animationID = window.requestAnimationFrame(() => this.draw());
}
/**
@ -203,6 +222,15 @@ export class SkinViewer {
dispose(): void {
this._disposed = true;
this.canvas.removeEventListener("webglcontextlost", this.onContextLost, false);
this.canvas.removeEventListener("webglcontextrestored", this.onContextRestored, false);
if (this.animationID !== null) {
window.cancelAnimationFrame(this.animationID);
this.animationID = null;
}
this.renderer.dispose();
this.skinTexture.dispose();
this.capeTexture.dispose();
@ -222,10 +250,13 @@ export class SkinViewer {
}
set renderPaused(value: boolean) {
const toResume = !this.disposed && !value && this._renderPaused;
this._renderPaused = value;
if (toResume) {
window.requestAnimationFrame(() => this.draw());
if (this._renderPaused && this.animationID !== null) {
window.cancelAnimationFrame(this.animationID);
this.animationID = null;
} else if (!this._renderPaused && !this._disposed && !this.renderer.getContext().isContextLost() && this.animationID == null) {
this.animationID = window.requestAnimationFrame(() => this.draw());
}
}