The EXT_disjoint_timer_query.beginQueryEXT() method of the WebGL API starts a timer query.
void ext.beginQueryEXT(target, query);
GLenum specifying the target of the time query. Must be ext.TIME_ELAPSED_EXT.queryWebGLQuery object for which to start the time querying.None.
var ext = gl.getExtension('EXT_disjoint_timer_query');
var query = ext.createQueryEXT();
ext.beginQueryEXT(ext.TIME_ELAPSED_EXT, query);
// ...
| Specification | Status | Comment |
|---|---|---|
| EXT_disjoint_timer_query The definition of 'EXT_disjoint_timer_query' in that specification. | Working Draft | Initial definition. |
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 47 | No | 51 | ? | ? | ? |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
|---|---|---|---|---|---|---|---|
| Basic support | ? | 47 | No | No | ? | ? | ? |
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https://developer.mozilla.org/en-US/docs/Web/API/EXT_disjoint_timer_query/beginQueryEXT