XRRenderState: layers property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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

The read-only layers property of the XRRenderState interface is an ordered array containing XRLayer objects that are displayed by the XR compositor.

Value

An ordered array containing XRLayer objects. The order of the layers is "back-to-front".

Examples

Getting render state layers

To read the WebXR layers array, use the layers property on XRRenderState. Layers can be set using the XRSession.updateRenderState() method.

const xrSession = navigator.xr.requestSession("immersive-ar", {
  optionalFeatures: ["layers"],
});

function onXRSessionStarted(xrSession) {
  const glCanvas = document.createElement("canvas");
  const gl = glCanvas.getContext("webgl", { xrCompatible: true });
  const xrGlBinding = new XRWebGLBinding(xrSession, gl);
  const projectionLayer = new XRWebGLLayer(xrSession, gl);
  const quadLayer = xrGlBinding.createQuadLayer({
    pixelWidth: 1024,
    pixelHeight: 1024,
  });

  xrSession.updateRenderState({
    layers: [projectionLayer, quadLayer],
  });

  xrSession.renderState.layers; // [projectionLayer, quadLayer]
}