この記事はまだボランティアによって 日本語 に翻訳されていません。ぜひ MDN に参加して翻訳を手伝ってください！
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
| 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.