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.

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_info The definition of 'WEBGL_debug_renderer_info' in that specification.	Recommendation	Initial definition.

Browser compatibility

1. This extension is available behind the prefix webgl.enable-debug-renderer-info and webgl.enable-privileged-extension that has to be set to true to activate the extension (since Firefox 19). From Firefox 42, they are enabled by default in Aurora and Nightly channels.

See also

• WebGLRenderingContext.getExtension()