{{APIRef("WebGL")}}
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 {{domxref("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 the {{domxref("WebGLRenderingContext.getParameter", "gl.getParameter()")}} call, and it returns the maximum available anisotropy. ext.TEXTURE_MAX_ANISOTROPY_EXT
- This is the
pname
argument to the {{domxref("WebGLRenderingContext.texParameter", "gl.texParameter()")}} and {{domxref("WebGLRenderingContext.getTexParameterf", "gl.getTexParameterf()")}}/{{domxref("WebGLRenderingContext.getTexParameteri", "gl.getTexParameteri()")}} 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 |
---|---|---|
{{SpecName('EXT_texture_filter_anisotropic', "", "EXT_texture_filter_anisotropic")}} | {{Spec2('EXT_texture_filter_anisotropic')}} | Initial definition. |
Browser compatibility
{{CompatibilityTable}}
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | {{CompatUnknown}} | {{CompatGeckoDesktop(17)}} [1] | {{CompatUnknown}} | {{CompatUnknown}} | {{CompatUnknown}} |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | {{CompatUnknown}} | {{CompatUnknown}} | {{CompatUnknown}} | {{CompatUnknown}} | {{CompatUnknown}} | {{CompatUnknown}} |
[1] This extension was prefixed as MOZ_EXT_texture_filter_anisotropic
in prior versions.
See also
- {{domxref("WebGLRenderingContext.getExtension()")}}