WebGL2RenderingContext.getQuery() - Web APIs 编辑

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

Syntax

WebGLQuery gl.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 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 be gl.CURRENT_QUERY.

Return value

A WebGLQuery object.

Examples

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

Specifications

Browser compatibility

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See also

• WebGLQuery