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EXT_disjoint_timer_query: queryCounterEXT() method

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The EXT_disjoint_timer_query.queryCounterEXT() method of the WebGL API records the current time into the corresponding query object.

Syntax

queryCounterEXT(query, target)

Parameters

query: A WebGLQuery object for which to record the current time.
target: A GLenum specifying the target of the time query. Must be ext.TIMESTAMP_EXT.

Return value

None (undefined).

Examples

const ext = gl.getExtension("EXT_disjoint_timer_query");
const startQuery = ext.createQueryEXT();
const endQuery = ext.createQueryEXT();
ext.queryCounterEXT(startQuery, ext.TIMESTAMP_EXT);

// …

ext.queryCounterEXT(endQuery, ext.TIMESTAMP_EXT);

Specifications

Specification
WebGL EXT_disjoint_timer_query Extension Specification>

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS
`queryCounterEXT`	70 Only supported on macOS. 47–65 Removed due to the GLitch exploit.	79 Only supported on macOS.	51–59 Removed due to the GLitch exploit.	57 Only supported on macOS. 34–52 Removed due to the GLitch exploit.	No	47–65 Removed due to the GLitch exploit.	No	34–47 Removed due to the GLitch exploit.	No	5.0–9.0 Removed due to the GLitch exploit.	47–65 Removed due to the GLitch exploit.	No