WebGL2RenderingContext.fenceSync()

This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The WebGL2RenderingContext.fenceSync() method of the WebGL 2 API creates a new WebGLSync object and inserts it into the GL command stream.

Syntax

WebGLSync gl.fenceSync(condition, flags);

Parameters

condition
A GLenum specifying the condition that must be met to set the sync object's state to signaled. Must be gl.SYNC_GPU_COMMANDS_COMPLETE.
flags
A GLbitfield specifying a bitwise combination of flags controlling the behavior of the sync object. Must be 0 (exists for extensions only).

Return value

A WebGLSync object.

Examples

gl must be a WebGL2RenderingContext. WebGLSync objects are not available in WebGL 1.

var sync = gl.fenceSync(gl.SYNC_GPU_COMMANDS_COMPLETE, 0);

Specifications

Specification Status Comment
WebGL 2.0
The definition of 'fenceSync' in that specification.
Editor's Draft Initial definition for WebGL.
OpenGL ES 3.0
The definition of 'glFenceSync' in that specification.
Standard Man page of the (similar) OpenGL API.

Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari Servo
Basic SupportNo support1No support51.0No supportNo supportNo supportNo support
Feature Android Chrome for Android Edge Mobile Firefox for Android IE Mobile Opera Mobile Safari Mobile
Basic SupportNo supportNo supportNo supportNo supportNo supportNo supportNo support

1. To use an experimental implementation of WebGL 2 in Chrome, you have to start Chrome with the runtime flag --enable-unsafe-es3-apis.

See also

Document Tags and Contributors

 Contributors to this page: teoli, fscholz
 Last updated by: teoli,