WebGLRenderingContext.disable() - Web APIs 编辑

The WebGLRenderingContext.disable() method of the WebGL API disables specific WebGL capabilities for this context.

Syntax

void gl.disable(cap);

cap

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

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

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

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

None.

gl.disable(gl.DITHER);

To check if a capability is disabled, use the WebGLRenderingContext.isEnabled() method:

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

Specification	Status	Comment
WebGL 1.0 The definition of 'disable' in that specification.	Recommendation	Initial definition for WebGL.
OpenGL ES 2.0 The definition of 'glDisable' in that specification.	Standard	Man page of the (similar) OpenGL ES 2.0 API.
OpenGL ES 3.0 The definition of 'glDisable' in that specification.	Standard	Man page of the (similar) OpenGL ES 3.0 API.

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