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The webglcontextrestored
event of the WebGL API is fired if the user agent restores the drawing buffer for a WebGLRenderingContext
object.
Once the context is restored, WebGL resources such as textures and buffers that were created before the context was lost are no longer valid. You need to reinitialize the state of your WebGL application and recreate resources.
Bubbles | Yes |
Cancelable | Yes |
Target objects | HTMLCanvasElement |
Interface | WebGLContextEvent |
Example
With the help of the WEBGL_lose_context
extension, you can simulate the webglcontextrestored
event:
var canvas = document.getElementById("canvas"); var gl = canvas.getContext("webgl"); canvas.addEventListener("webglcontextrestored", function(e) { console.log(e); }, false); gl.getExtension('WEBGL_lose_context').restoreContext(); // "webglcontextrestored" event is logged.
Inheritance
The webglcontextrestored
event implements the WebGLContextEvent
interface, which inherits from Event
. You can use the properties and methods defined on these interfaces.
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Specifications
Specification | Status | Comment |
---|---|---|
WebGL 1.0 The definition of 'webglcontextrestored' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | 9 | 4.0 (2.0) | 11 | 12 | 5.1 |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | ? | 25 | 4.0 (2.0) | ? | 12 | 8.0 |