web api instance method

WebGLRenderingContext: enable() method

Available in workers

The WebGLRenderingContext.enable() method of the WebGL API enables specific WebGL capabilities for this context.

Syntax

enable(cap)

cap

: A GLenum specifying which WebGL capability to enable. Possible values:

Constant	Description
`gl.BLEND`	Activates blending of the computed fragment color values. See `blendFunc()`.
`gl.CULL_FACE`	Activates culling of polygons. See `cullFace()`.
`gl.DEPTH_TEST`	Activates depth comparisons and updates to the depth buffer. See `depthFunc()`.
`gl.DITHER`	Activates dithering of color components before they get written to the color buffer.
`gl.POLYGON_OFFSET_FILL`	Activates adding an offset to depth values of polygon’s fragments. See `polygonOffset()`.
`gl.SAMPLE_ALPHA_TO_COVERAGE`	Activates the computation of a temporary coverage value determined by the alpha value.
`gl.SAMPLE_COVERAGE`	Activates ANDing the fragment’s coverage with the temporary coverage value. See `sampleCoverage()`.
`gl.SCISSOR_TEST`	Activates the scissor test that discards fragments that are outside of the scissor rectangle. See `scissor()`.
`gl.STENCIL_TEST`	Activates stencil testing and updates to the stencil buffer. See `stencilFunc()`.

When using a WebGL 2 context, the following values are available additionally:

Constant	Description
`gl.RASTERIZER_DISCARD`	Primitives are discarded immediately before the rasterization stage, but after the optional transform feedback stage. `gl.clear()` commands are ignored.

gl.enable(gl.DITHER);

To check if a capability is enabled, use the isEnabled() method:

gl.isEnabled(gl.DITHER);
// true

SpecificationsStandards references are available on the canonical MDN page.

Browser compatibilityCompatibility data is available on the canonical MDN page.