WebGLRenderingContext.hint()

The WebGLRenderingContext.hint() method of the WebGL API specifies hints for certain behaviors. The interpretation of these hints depend on the implementation.

target

Sets which behavior to be controlled. Possible values:

• gl.GENERATE_MIPMAP_HINT: Quality of filtering when generating mipmap images with WebGLRenderingContext.generateMipmap().
• When using the OES_standard_derivatives extension:
  • ext.FRAGMENT_SHADER_DERIVATIVE_HINT_OES: Accuracy of the derivative calculation for the GLSL built-in functions: dFdx, dFdy, and fwidth.
• When using a WebGL 2 context, the following values are available additionally:
  • gl.FRAGMENT_SHADER_DERIVATIVE_HINT: Same as ext.FRAGMENT_SHADER_DERIVATIVE_HINT_OES

mode

Sets the behavior. The default value is gl.DONT_CARE. The possible values are:

• gl.FASTEST: The most efficient behavior should be used.
• gl.NICEST: The most correct or the highest quality option should be used.
• gl.DONT_CARE: There is no preference for this behavior.

None.

The following example hints that the quality of filtering when generating mipmap images should be most efficient instead of best quality.

gl.hint(gl.GENERATE_MIPMAP_HINT, gl.FASTEST);

• WebGLRenderingContext.generateMipmap()
• OES_standard_derivatives