WebGL2RenderingContext: getQuery() method

{{APIRef("WebGL")}}{{AvailableInWorkers}}

The WebGL2RenderingContext.getQuery() method of the WebGL 2 API returns the currently active {{domxref("WebGLQuery")}} for the target, or null.

Syntax

getQuery(target, pname)

Parameters

• target

  • : A {{domxref("WebGL_API/Types", "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 {{domxref("WebGL_API/Types", "GLenum")}} specifying the query object target. Must be gl.CURRENT_QUERY.

Return value

A {{domxref("WebGLQuery")}} object.

Examples

const currentQuery = gl.getQuery(gl.ANY_SAMPLES_PASSED, gl.CURRENT_QUERY);

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{domxref("WebGLQuery")}}