Web/API/EXT texture filter anisotropic

The EXT_texture_filter_anisotropic extension is part of the WebGL API and exposes two constants for anisotropic filtering (AF).

AF improves the quality of mipmapped texture access when viewing a textured primitive at an oblique angle. Using just mipmapping, these lookups have a tendency to average to grey.

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

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

Constants

ext.MAX_TEXTURE_MAX_ANISOTROPY_EXT: This is the pname argument to the gl.getParameter() call, and it returns the maximum available anisotropy.
ext.TEXTURE_MAX_ANISOTROPY_EXT: This is the pname argument to the gl.getTexParameter() and gl.texParameterf() / gl.texParameteri() calls and sets the desired maximum anisotropy for a texture.

Examples

var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
var ext = (
  gl.getExtension('EXT_texture_filter_anisotropic') ||
  gl.getExtension('MOZ_EXT_texture_filter_anisotropic') ||
  gl.getExtension('WEBKIT_EXT_texture_filter_anisotropic')
);
if (ext){
  var max = gl.getParameter(ext.MAX_TEXTURE_MAX_ANISOTROPY_EXT);
  gl.texParameterf(gl.TEXTURE_2D, ext.TEXTURE_MAX_ANISOTROPY_EXT, max);
}

Specifications

Specification	Status	Comment
EXT_texture_filter_anisotropicThe definition of 'EXT_texture_filter_anisotropic' 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
`EXT_texture_filter_anisotropic`	Chrome Full support 34 Full support 34 Full support 35 Prefixed' Prefixed' Implemented with the vendor prefix: WEBKIT_	Edge Full support 12 Full support 12 Full support 79 Prefixed' Prefixed' Implemented with the vendor prefix: WEBKIT_	Firefox Full support 47	IE Full support 11	Opera Full support 21 Full support 21 Full support 22 Prefixed' Prefixed' Implemented with the vendor prefix: WEBKIT_	Safari Full support 7	WebView Android Full support 37 Full support 37 Full support 37 Prefixed' Prefixed' Implemented with the vendor prefix: WEBKIT_	Chrome Android Full support 34 Full support 34 Full support 35 Prefixed' Prefixed' Implemented with the vendor prefix: WEBKIT_	Firefox Android Full support 47	Opera Android Full support 21 Full support 21 Full support 22 Prefixed' Prefixed' Implemented with the vendor prefix: WEBKIT_	Safari iOS Full support 7	Samsung Internet Android Full support 3.0 Full support 3.0 Full support 4.0 Prefixed' Prefixed' Implemented with the vendor prefix: WEBKIT_

Legend

Full support: Full support
Requires a vendor prefix or different name for use.': Requires a vendor prefix or different name for use.