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add onContextLoss to webgl addon #3276

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Merged
meganrogge merged 6 commits into from
Apr 2, 2021
Merged

add onContextLoss to webgl addon #3276

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fa7889c
add onRecovercontext event
meganrogge Apr 1, 2021
47ac4dd
Merge branch 'master' into webgl
meganrogge Apr 1, 2021
b1877b4
onRecoverContext -> onContextLoss
meganrogge Apr 1, 2021
c533911
Add note to readme on handling context loss
Tyriar Apr 1, 2021
113086f
tweak readme, expose API
meganrogge Apr 1, 2021
6f59b56
Merge branch 'master' into webgl
meganrogge Apr 1, 2021
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6 changes: 5 additions & 1 deletion addons/xterm-addon-webgl/src/WebglAddon.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,14 +3,17 @@
* @license MIT
*/

import { Terminal, ITerminalAddon } from 'xterm';
import { Terminal, ITerminalAddon, IEvent } from 'xterm';
import { WebglRenderer } from './WebglRenderer';
import { IRenderService } from 'browser/services/Services';
import { IColorSet } from 'browser/Types';
import { EventEmitter } from 'common/EventEmitter';

export class WebglAddon implements ITerminalAddon {
private _terminal?: Terminal;
private _renderer?: WebglRenderer;
private _onContextLoss = new EventEmitter<void>();
public get onContextLoss(): IEvent<void> { return this._onContextLoss.event; }

constructor(
private _preserveDrawingBuffer?: boolean
Expand All @@ -24,6 +27,7 @@ export class WebglAddon implements ITerminalAddon {
const renderService: IRenderService = (<any>terminal)._core._renderService;
const colors: IColorSet = (<any>terminal)._core._colorManager.colors;
this._renderer = new WebglRenderer(terminal, colors, this._preserveDrawingBuffer);
this._renderer.onContextLoss(() => this._onContextLoss.fire());
renderService.setRenderer(this._renderer);
}

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7 changes: 7 additions & 0 deletions addons/xterm-addon-webgl/src/WebglRenderer.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ import { IRenderDimensions, IRenderer, IRequestRedrawEvent } from 'browser/rende
import { ITerminal, IColorSet } from 'browser/Types';
import { EventEmitter } from 'common/EventEmitter';
import { CellData } from 'common/buffer/CellData';
import { addDisposableDomListener } from 'browser/Lifecycle';

export class WebglRenderer extends Disposable implements IRenderer {
private _renderLayers: IRenderLayer[];
Expand All @@ -41,6 +42,9 @@ export class WebglRenderer extends Disposable implements IRenderer {
private _onRequestRedraw = new EventEmitter<IRequestRedrawEvent>();
public get onRequestRedraw(): IEvent<IRequestRedrawEvent> { return this._onRequestRedraw.event; }

private _onContextLoss = new EventEmitter<void>();
public get onContextLoss(): IEvent<void> { return this._onContextLoss.event; }

constructor(
private _terminal: Terminal,
private _colors: IColorSet,
Expand Down Expand Up @@ -82,6 +86,9 @@ export class WebglRenderer extends Disposable implements IRenderer {
if (!this._gl) {
throw new Error('WebGL2 not supported ' + this._gl);
}

this.register(addDisposableDomListener(this._canvas, 'webglcontextlost', (e) => { this._onContextLoss.fire(e); }));

this._core.screenElement!.appendChild(this._canvas);

this._rectangleRenderer = new RectangleRenderer(this._terminal, this._colors, this._gl, this.dimensions);
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