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.
Constants
ext.MAX_TEXTURE_MAX_ANISOTROPY_EXT
- This is the
pname
argument to thegl.getParameter()
call, and it returns the maximum available anisotropy. ext.TEXTURE_MAX_ANISOTROPY_EXT
- This is the
pname
argument to thegl.getTexParameter()
andgl.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
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.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
EXT_texture_filter_anisotropic | Chrome
Full support
Yes
| Edge Full support ≤18 | Firefox Full support 17 | IE ? | Opera
Full support
Yes
| Safari ? | WebView Android
Full support
Yes
| Chrome Android
Full support
Yes
| Firefox Android ? | Opera Android
Full support
Yes
| Safari iOS ? | Samsung Internet Android
Full support
Yes
|
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown
- Requires a vendor prefix or different name for use.
- Requires a vendor prefix or different name for use.