EXT_disjoint_timer_query.getQueryObjectEXT()
The EXT_disjoint_timer_query.getQueryObjectEXT()
method
of the WebGL API returns the state of a
query object.
Syntax
any ext.getQueryObjectEXT(query, pname);
Parameters
query
-
A
WebGLQuery
object from which to return information. pname
-
A
GLenum
specifying which information to return. Must beext.QUERY_RESULT_EXT
orext.QUERY_RESULT_AVAILABLE_EXT
.
Return value
Depends on pname
:
-
If
pname
isext.QUERY_RESULT_EXT
: AGLuint64EXT
containing the query result. -
If
pname
isext.QUERY_RESULT_AVAILABLE_EXT
: AGLboolean
indicating whether or not a query result is available.
Examples
var ext = gl.getExtension('EXT_disjoint_timer_query');
var query = ext.createQueryEXT();
ext.beginQueryEXT(ext.TIME_ELAPSED_EXT, query);
// ... drawing ...
ext.endQueryEXT(ext.TIME_ELAPSED_EXT);
// At some point in the future, after returning control to the browser
var available = ext.getQueryObjectEXT(query, ext.QUERY_RESULT_AVAILABLE_EXT);
var disjoint = gl.getParameter(ext.GPU_DISJOINT_EXT);
if (available && !disjoint) {
// See how much time the rendering of the object took in nanoseconds.
var timeElapsed = ext.getQueryObjectEXT(query, ext.QUERY_RESULT_EXT);
}
Specifications
Specification |
---|
WebGL EXT_disjoint_timer_query Extension Specification |
Browser compatibility
BCD tables only load in the browser