forked from xtermjs/xterm.js
/
WebglAddon.ts
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/
WebglAddon.ts
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/**
* Copyright (c) 2017 The xterm.js authors. All rights reserved.
* @license MIT
*/
import { Terminal, ITerminalAddon, IEvent } from 'xterm';
import { WebglRenderer } from './WebglRenderer';
import { ICharacterJoinerService, ICoreBrowserService, IRenderService } from 'browser/services/Services';
import { IColorSet } from 'browser/Types';
import { EventEmitter, forwardEvent } from 'common/EventEmitter';
import { isSafari } from 'common/Platform';
import { ICoreService, IDecorationService } from 'common/services/Services';
import { Disposable, toDisposable } from 'common/Lifecycle';
export class WebglAddon extends Disposable implements ITerminalAddon {
private _terminal?: Terminal;
private _renderer?: WebglRenderer;
private readonly _onChangeTextureAtlas = this.register(new EventEmitter<HTMLElement>());
public readonly onChangeTextureAtlas = this._onChangeTextureAtlas.event;
private readonly _onContextLoss = this.register(new EventEmitter<void>());
public readonly onContextLoss = this._onContextLoss.event;
constructor(
private _preserveDrawingBuffer?: boolean
) {
super();
}
public activate(terminal: Terminal): void {
if (isSafari) {
throw new Error('Webgl is not currently supported on Safari');
}
const core = (terminal as any)._core;
if (!terminal.element) {
this.register(core.onWillOpen(() => this.activate(terminal)));
return;
}
this._terminal = terminal;
const renderService: IRenderService = core._renderService;
const characterJoinerService: ICharacterJoinerService = core._characterJoinerService;
const coreBrowserService: ICoreBrowserService = core._coreBrowserService;
const coreService: ICoreService = core.coreService;
const decorationService: IDecorationService = core._decorationService;
const colors: IColorSet = core._colorManager.colors;
this._renderer = this.register(new WebglRenderer(terminal, colors, characterJoinerService, coreBrowserService, coreService, decorationService, this._preserveDrawingBuffer));
this.register(forwardEvent(this._renderer.onContextLoss, this._onContextLoss));
this.register(forwardEvent(this._renderer.onChangeTextureAtlas, this._onChangeTextureAtlas));
renderService.setRenderer(this._renderer);
this.register(toDisposable(() => {
const renderService: IRenderService = (this._terminal as any)._core._renderService;
renderService.setRenderer((this._terminal as any)._core._createRenderer());
renderService.onResize(terminal.cols, terminal.rows);
}));
}
public get textureAtlas(): HTMLCanvasElement | undefined {
return this._renderer?.textureAtlas;
}
public clearTextureAtlas(): void {
this._renderer?.clearTextureAtlas();
}
}