XRWebGLLayerInit.antialias - Web APIs 编辑

Secure context

This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The Boolean antialias property, if present and set to true in the XRWebGLLayerInit object provided as the XRWebGLLayer() constructor's layerInit parameter, requests that the new WebGL rendering layer support anti-aliasing. If this property is missing or is false, anti-aliasing is not desired.

There is no way to request a specific anti-aliasing format or level; this decision is left up to the user agent.

Syntax

let layerInit = {
  antialias: boolValue
};
let glLayer = new XRWebGLLayer(xrSession, gl, layerInit);

let glLayer = new XRWebGLLayer(xrSession, gl, { antialias: boolValue });

Value

A Boolean value which can be set to true to request anti-aliasing support in the new WebGL rendering layer. If false, anti-aliasing is not desired.

Usage notes

The state of anti-aliasing for the context after being created can be read from the XRWebGLLayer property antialias.

Example

In this example, before creating a new XRWebGLLayer to use for rendering, the value of a user preference from a configuration interface is obtained using a function called getPreferenceValue() to determine whether the user has enabled or disabled anti-aliasing support; this is passed into the constructor.

let options = {
  antialias: getPreferenceValue("antialiasing")
};

let glLayer = new XRWebGLLayer(xrSession, gl, options);
if (glLayer) {
  xrSession.updateRenderState({ baseLayer: glLayer });
}

Offering the user features such as the ability to enable or disable things like anti-aliasing can provide them with optiions to try when your app isn't performing as well as they'd like. Disabling anti-aliasing may improve performance to some extent.

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• WebXR Device API
• Getting started with WebGL
• XRWebGLLayer.antialias