Kenneth Russell
9459553665
If the context is restored within a brief period of time (3 seconds), recreate members dependent on WebGL state, and fire onRequestRedraw to the renderer's listeners. Handle changes to the char atlas better in the demo client. Tested in Chrome Canary on macOS by running the demo in one window, and visiting the internal URL about:gpucrash in another window. The terminal now recovers and redraws properly.
xterm-addon-webgl
An addon for xterm.js that enables a WebGL2-based renderer. This addon requires xterm.js v4+.
Install
npm install --save xterm-addon-webgl
Usage
import { Terminal } from 'xterm';
import { WebglAddon } from 'xterm-addon-webgl';
const terminal = new Terminal();
terminal.open(element);
terminal.loadAddon(new WebglAddon());
See the full API for more advanced usage.
Handling Context Loss
The browser may drop WebGL contexts for various reasons like OOM or after the system has been suspended. There is an API exposed that fires the webglcontextlost event fired on the canvas so embedders can handle it however they wish. An easy, but suboptimal way, to handle this is by disposing of WebglAddon when the event fires:
const terminal = new Terminal();
const addon = new WebglAddon();
addon.onContextLoss(e => {
addon.dispose();
});
terminal.loadAddon(addon);
Read more about handling WebGL context losses on the Khronos wiki.
See also
- xterm-addon-canvas A renderer for xterm.js that uses a 2d canvas that can be used as a fallback when WebGL is not available