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The WebGLTimerQueryEXT interface is part of the WebGL EXT_disjoint_timer_query extension and exposes a timer query object.
WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also Using Extensions in the WebGL tutorial.
When working with WebGLTimerQueryEXT objects, the following methods of the EXT_disjoint_timer_query extension are useful:
ext.createQueryEXT()ext.deleteQueryEXT()ext.isQueryEXT()ext.beginQueryEXT()ext.endQueryEXT()ext.queryCounterEXT()ext.getQueryEXT()ext.getQueryObjectEXT()
Examples
var ext = gl.getExtension("EXT_disjoint_timer_query");
var query = ext.createQueryEXT(); // creates a WebGLTimerQueryEXT object
Specifications
| Specification | Status | Comment |
|---|---|---|
| EXT_disjoint_timer_query The definition of 'EXT_disjoint_timer_query' in that specification. |
Working Draft | Initial definition. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | ? | 41 (41) [1] | ? | ? | ? |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | ? | ? | ? | ? | ? | ? |
[1] Toggling the webgl.enable-draft-extensions preference in about:config is required.