EXT_texture_filter_anisotropic extension

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since June 2016.

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.

Note: 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

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

Specifications

Specification
WebGL EXT_texture_filter_anisotropic Khronos Ratified Extension Specification

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
EXT_texture_filter_anisotropic

Legend

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Full support
Full support
Requires a vendor prefix or different name for use.
Has more compatibility info.

See also