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_anisotropic
The definition of 'EXT_texture_filter_anisotropic' in that specification.
Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
EXT_texture_filter_anisotropicChrome 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 47IE Full support 11Opera Full support 21
Full support 21
Full support 22
Prefixed
Prefixed Implemented with the vendor prefix: WEBKIT_
Safari Full support 7WebView 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 47Opera Android Full support 21
Full support 21
Full support 22
Prefixed
Prefixed Implemented with the vendor prefix: WEBKIT_
Safari iOS Full support 7Samsung 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.

See also