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WEBGL_lose_context

The WEBGL_lose_context extension is part of the WebGL API and exposes functions to simulate losing and restoring a WebGLRenderingContext.

WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also Using Extensions in the WebGL tutorial.

Availability: This extension is available to both, WebGL1 and WebGL2 contexts.

Methods

WEBGL_lose_context.loseContext()
Simulates losing the context.
WEBGL_lose_context.restoreContext()
Simulates restoring the context.

Examples

With this extension, you can simulate the webglcontextlost and webglcontextrestored events:

var canvas = document.getElementById("canvas");
var gl = canvas.getContext("webgl");

canvas.addEventListener("webglcontextlost", function(e) {
  console.log(e); 
}, false);

gl.getExtension('WEBGL_lose_context').loseContext();

// WebGLContextEvent event with type "webglcontextlost" is logged.

Specifications

Specification Status Comment
WEBGL_lose_context
The definition of 'WEBGL_lose_context' in that specification.
Recommendation Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support ? 22 (22) [1] ? ? ?
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? ? ? ? ?

[1] This extension was prefixed with MOZ_ from version 19 to version 21.

See also

Document Tags and Contributors

 Contributors to this page: fscholz
 Last updated by: fscholz,