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.

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

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

See also

• WebGLRenderingContext.isContextLost()
• Events: webglcontextlost, webglcontextrestored, webglcontextcreationerror