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

See also

• WebGLRenderingContext.createTexture()
• WebGLRenderingContext.bindTexture()
• WebGLRenderingContext.getTexParameter()
• WebGLRenderingContext.texParameterf()
• WebGLRenderingContext.texParameteri()