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 Internet Explorer Opera Safari Servo
Basic Support9124.011125.1No support
WebGL2No support1No support51.0No supportNo supportNo supportNo support
Feature Android Chrome for Android Edge Mobile Firefox for Android IE Mobile Opera Mobile Safari Mobile
Basic Support(Yes)25(Yes)4.011128.1
WebGL2No supportNo support(Yes)51.0No supportNo supportNo support

1. 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: teoli, dmotz, fscholz
 Last updated by: teoli,