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WebGLRenderingContext.generateMipmap()

The WebGLRenderingContext.generateMipmap() method of the WebGL API generates a set of mipmaps for a WebGLTexture object.

Mipmaps are used to create distance with objects. A higher-resolution mipmap is used for objects that are closer, and a lower-resolution mipmap is used for objects that are farther away. It starts with the resolution of the texture image and halves the resolution until a 1x1 dimension texture image is created.

Syntax

void gl.generateMipmap(target);

Parameters

target
A GLenum specifying the binding point (target) of the active texture whose mipmaps will be generated. Possible values:
  • gl.TEXTURE_2D: A two-dimensional texture.
  • gl.TEXTURE_CUBE_MAP: A cube-mapped texture.
  • When using a WebGL 2 context, the following values are available additionally:
    • gl.TEXTURE_3D: A three-dimensional texture.
    • gl.TEXTURE_2D_ARRAY: A two-dimensional array texture.

Return value

None.

Examples

gl.generateMipmap(gl.TEXTURE_2D);

Specifications

Specification Status Comment
WebGL 1.0
The definition of 'generateMipmap' in that specification.
Recommendation Initial definition for WebGL.
OpenGL ES 2.0
The definition of 'glGenerateMipmap' in that specification.
Standard Man page of the (similar) OpenGL ES 2.0 API.
OpenGL ES 3.0
The definition of 'glGenerateMipmap' in that specification.
Standard Man page of the (similar) OpenGL ES 3.0 API.
Adds: gl.TEXTURE_3D and gl.TEXTURE_2D_ARRAY

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support 9 12 4.0 (2.0) 11 12 5.1
WebGL 2 No support [2] No support Nightly build [1] No support No support No support
Feature Android Chrome for Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile
Basic support ? 25 4.0 (2.0) 1.0 ? 12 8.0
WebGL 2 No support No support No support No support No support No support No support

[1] WebGL 2 is enabled by default in Firefox Nightly. To enable it in a release version of Firefox, set the preference webgl.enable-prototype-webgl2 to true in about:config.

[2] To use an experimental implementation of WebGL 2 in Chrome, you have to start Chrome with the runtime flag --enable-unsafe-es3-apis.

See also

Document Tags and Contributors

 Contributors to this page: dmotz, fscholz
 Last updated by: dmotz,