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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 compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	9	12	4	11	12	5.1
`WebGL2`	56	No	51	No	43	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	Yes	25	Yes	Yes	12	8.1	Yes
`WebGL2`	58	58	No	51	43	No	7.0