The createQuadLayer() method of the XRWebGLBinding interface returns an XRQuadLayer object which is a layer that takes up a flat rectangular space in the virtual environment.

options

An object to configure the XRQuadLayer. It must have the space, viewPixelHeight, and viewPixelWidth properties. init has the following properties:

colorFormat Optional

A GLenum defining the data type of the color texture data. Possible values:

• gl.RGB
• gl.RGBA Additionally, for contexts with the EXT_sRGB extension enabled:
• ext.SRGB_EXT
• ext.SRGB_ALPHA_EXT Additionally, for WebGL2RenderingContext contexts:
• gl.RGBA8
• gl.RGB8
• gl.SRGB8
• gl.RGB8_ALPHA8 Additionally, for contexts with the WEBGL_compressed_texture_etc extension enabled:
• ext.COMPRESSED_RGB8_ETC2
• ext.COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2
• ext.COMPRESSED_RGBA8_ETC2_EAC
• ext.COMPRESSED_SRGB8_ETC2
• ext.COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2
• ext.COMPRESSED_SRGB8_ALPHA8_ETC2_EAC Additionally, for contexts with the WEBGL_compressed_texture_astc extension enabled:
• All of the formats the extension supports. The default value is gl.RGBA.

depthFormat Optional

A GLenum defining the data type of the depth texture data or 0 indicating that the layer should not provide a depth texture (in that case XRProjectionLayer.ignoreDepthValues will be true). Possible values within WebGLRenderingContext contexts with the WEBGL_depth_texture extension enabled, or within WebGL2RenderingContext contexts (no extension required):

• gl.DEPTH_COMPONENT
• gl.DEPTH_STENCIL Additionally, for WebGL2RenderingContext contexts:
• gl.DEPTH_COMPONENT24
• gl.DEPTH24_STENCIL24 The default value is gl.DEPTH_COMPONENT.

height Optional

A number specifying the height of the layer in meters. The default value is 1.0.

isStatic Optional

A boolean that, if true, indicates you can only draw to this layer when needsRedraw is true. The default value is false.

layout Optional

A string indicating the layout of the layer. Possible values:

default

The layer accommodates all views of the session.

mono

A single XRSubImage is allocated and presented to both eyes.

stereo

The user agent decides how it allocates the XRSubImage (one or two) and the layout (top/bottom or left/right).

stereo-left-right

A single XRSubImage is allocated. Left eye gets the left area of the texture, right eye the right.

stereo-top-bottom

A single XRSubImage is allocated. Left eye gets the top area of the texture, right eye the bottom. The default value is mono.

mipLevels Optional

A number specifying desired number of mip levels. The default value is 1.

space Required

An XRSpace object defining the layer's spatial relationship with the user's physical environment.

textureType Optional

A string defining the type of texture the layer will have. Possible values:

texture

The textures of XRWebGLSubImage will be of type gl.TEXTURE_2D.

texture-array

the textures of XRWebGLSubImage will be of type gl.TEXTURE_2D_ARRAY (WebGL 2 contexts only). The default value is texture.

transform Optional

An XRRigidTransform object defining the offset and orientation relative to space.

viewPixelHeight Required

A number specifying the pixel height of the layer view.

viewPixelWidth Required

A number specifying the pixel width of the layer view.

width Optional

A number specifying the width of the layer in meters. The default value is 1.0.

An XRQuadLayer object.

Configure the quad layer using the properties listed above in a call to createQuadLayer(). To present layers to the XR device, add them to the layers render state using XRSession.updateRenderState().

function onXRSessionStarted(xrSession) {
  const glCanvas = document.createElement("canvas");
  const gl = glCanvas.getContext("webgl2", { xrCompatible: true });
  const xrGlBinding = new XRWebGLBinding(xrSession, gl);
  const quadLayer = xrGlBinding.createQuadLayer({
    space: xrReferenceSpace,
    viewPixelHeight: 512,
    viewPixelWidth: 512,
    transform: new XRRigidTransform({ z: -2 }),
  });
  xrSession.updateRenderState({
    layers: [quadLayer],
  });
}

• XRQuadLayer
• WebGL constants