WebGL2RenderingContext: getQuery() method
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.
Note: This feature is available in Web Workers.
The WebGL2RenderingContext.getQuery()
method of the WebGL 2 API returns the currently active
WebGLQuery
for the target
, or null
.
Syntax
getQuery(target, pname)
Parameters
target
-
A
GLenum
specifying the target of the query. Possible values:gl.ANY_SAMPLES_PASSED
-
Specifies an occlusion query: these queries detect whether an object is visible (whether the scoped drawing commands pass the depth test and if so, how many samples pass).
gl.ANY_SAMPLES_PASSED_CONSERVATIVE
-
Same as above, but less accurate and faster version.
gl.TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN
-
Number of primitives that are written to transform feedback buffers.
pname
-
A
GLenum
specifying the query object target. Must begl.CURRENT_QUERY
.
Return value
A WebGLQuery
object.
Examples
const currentQuery = gl.getQuery(gl.ANY_SAMPLES_PASSED, gl.CURRENT_QUERY);
Specifications
Specification |
---|
WebGL 2.0 Specification # 3.7.12 |
Browser compatibility
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