Web/API/WEBGL debug renderer info

The WEBGL_debug_renderer_info extension is part of the WebGL API and exposes two constants with information about the graphics driver for debugging purposes.

Depending on the privacy settings of the browser, this extension might only be available to privileged contexts. Generally, the graphics driver information should only be used in edge cases to optimize your WebGL content or to debug GPU problems. The WebGLRenderingContext.getParameter() method can help you to detect which features are supported and the failIfMajorPerformanceCaveat context attribute lets you control if a context should be returned at all, if the performance would be dramatically slow.

WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also Using Extensions in the WebGL tutorial.

Availability: Depending on the privacy settings of the browser, this extension might only be available to privileged contexts or not work at all. In Firefox, if privacy.resistFingerprinting is set to true, this extensions is disabled.

This extension is available to both, WebGL1 and WebGL2 contexts.

Constants

ext.UNMASKED_VENDOR_WEBGL: Vendor string of the graphics driver.
ext.UNMASKED_RENDERER_WEBGL: Renderer string of the graphics driver.

Examples

With the help of this extension, privileged contexts are able to retrieve debugging information about about the user's graphic driver:

var canvas = document.getElementById('canvas');
var gl = canvas.getContext('webgl');

var debugInfo = gl.getExtension('WEBGL_debug_renderer_info');
var vendor = gl.getParameter(debugInfo.UNMASKED_VENDOR_WEBGL);
var renderer = gl.getParameter(debugInfo.UNMASKED_RENDERER_WEBGL);

console.log(vendor);
console.log(renderer);

Specifications

Specification	Status	Comment
WEBGL_debug_renderer_infoThe definition of 'WEBGL_debug_renderer_info' in that specification.	Recommendation	Initial definition.

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`WEBGL_debug_renderer_info`	Chrome Full support 33	Edge Full support ≤18	Firefox Full support 53 Full support 53 No support ? — 53 Disabled' Disabled' Until version 53 (exclusive): this feature is behind the `webgl.enable-debug-renderer-info` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support Yes	Safari Full support Yes	WebView Android Full support 37	Chrome Android Full support 33	Firefox Android ?	Opera Android ?	Safari iOS ?	Samsung Internet Android Full support 2.0

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown
User must explicitly enable this feature.': User must explicitly enable this feature.