EXT_disjoint_timer_query: getQueryObjectEXT() 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.getQueryObjectEXT() method of the WebGL API returns the state of a query object.
Syntax
js
getQueryObjectEXT(query, pname) Parameters
query-
A
WebGLQueryobject from which to return information. pname-
A
GLenumspecifying which information to return. Must beext.QUERY_RESULT_EXTorext.QUERY_RESULT_AVAILABLE_EXT.
Return value
Depends on pname:
- If
pnameisext.QUERY_RESULT_EXT: AGLuint64EXTcontaining the query result. - If
pnameisext.QUERY_RESULT_AVAILABLE_EXT: AGLbooleanindicating whether or not a query result is available.
Examples
js
const ext = gl.getExtension("EXT_disjoint_timer_query"); const query = ext.createQueryEXT(); ext.beginQueryEXT(ext.TIME_ELAPSED_EXT, query); // Draw ext.endQueryEXT(ext.TIME_ELAPSED_EXT); // At some point in the future, after returning control to the browser const available = ext.getQueryObjectEXT(query, ext.QUERY_RESULT_AVAILABLE_EXT); const disjoint = gl.getParameter(ext.GPU_DISJOINT_EXT); if (available && !disjoint) { // See how much time the rendering of the object took in nanoseconds. const timeElapsed = ext.getQueryObjectEXT(query, ext.QUERY_RESULT_EXT); } Specifications
| Specification |
|---|
| WebGL EXT_disjoint_timer_query Extension Specification |