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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 { ICharacterJoinerService, ICharSizeService, ICoreBrowserService, IRenderService, IThemeService } from 'browser/services/Services';
import { ITerminal } from 'browser/Types';
import { EventEmitter, forwardEvent } from 'common/EventEmitter';
import { Disposable, toDisposable } from 'common/Lifecycle';
import { getSafariVersion, isSafari } from 'common/Platform';
import { ICoreService, IDecorationService, IOptionsService } from 'common/services/Services';
import { ITerminalAddon, Terminal } from 'xterm';
import { WebglRenderer } from './WebglRenderer';
export class WebglAddon extends Disposable implements ITerminalAddon {
private _terminal?: Terminal;
private _renderer?: WebglRenderer;
private readonly _onChangeTextureAtlas = this.register(new EventEmitter<HTMLCanvasElement>());
public readonly onChangeTextureAtlas = this._onChangeTextureAtlas.event;
private readonly _onAddTextureAtlasCanvas = this.register(new EventEmitter<HTMLCanvasElement>());
public readonly onAddTextureAtlasCanvas = this._onAddTextureAtlasCanvas.event;
private readonly _onRemoveTextureAtlasCanvas = this.register(new EventEmitter<HTMLCanvasElement>());
public readonly onRemoveTextureAtlasCanvas = this._onRemoveTextureAtlasCanvas.event;
private readonly _onContextLoss = this.register(new EventEmitter<void>());
public readonly onContextLoss = this._onContextLoss.event;
constructor(
private _preserveDrawingBuffer?: boolean
) {
if (isSafari && getSafariVersion() < 16) {
throw new Error('Webgl2 is only supported on Safari 16 and above');
}
super();
}
public activate(terminal: Terminal): void {
const core = (terminal as any)._core as ITerminal;
if (!terminal.element) {
this.register(core.onWillOpen(() => this.activate(terminal)));
return;
}
this._terminal = terminal;
const coreService: ICoreService = core.coreService;
const optionsService: IOptionsService = core.optionsService;
const unsafeCore = core as any;
const renderService: IRenderService = unsafeCore._renderService;
const characterJoinerService: ICharacterJoinerService = unsafeCore._characterJoinerService;
const charSizeService: ICharSizeService = unsafeCore._charSizeService;
const coreBrowserService: ICoreBrowserService = unsafeCore._coreBrowserService;
const decorationService: IDecorationService = unsafeCore._decorationService;
const themeService: IThemeService = unsafeCore._themeService;
this._renderer = this.register(new WebglRenderer(
terminal,
characterJoinerService,
charSizeService,
coreBrowserService,
coreService,
decorationService,
optionsService,
themeService,
this._preserveDrawingBuffer
));
this.register(forwardEvent(this._renderer.onContextLoss, this._onContextLoss));
this.register(forwardEvent(this._renderer.onChangeTextureAtlas, this._onChangeTextureAtlas));
this.register(forwardEvent(this._renderer.onAddTextureAtlasCanvas, this._onAddTextureAtlasCanvas));
this.register(forwardEvent(this._renderer.onRemoveTextureAtlasCanvas, this._onRemoveTextureAtlasCanvas));
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.handleResize(terminal.cols, terminal.rows);
}));
}
public get textureAtlas(): HTMLCanvasElement | undefined {
return this._renderer?.textureAtlas;
}
public clearTextureAtlas(): void {
this._renderer?.clearTextureAtlas();
}
}