The EXT_disjoint_timer_query.getQueryObjectEXT() method of the WebGL API returns the state of a query object.
getQueryObjectEXT(query, pname)queryA WebGLQuery object from which to return information.
pnameA GLenum specifying which information to return. Must be ext.QUERY_RESULT_EXT or ext.QUERY_RESULT_AVAILABLE_EXT.
Depends on pname:
pname is ext.QUERY_RESULT_EXT: A GLuint64EXT containing the query result.pname is ext.QUERY_RESULT_AVAILABLE_EXT: A GLboolean indicating whether or not a query result is available.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);
}