The read-only colorTexture
property of the XRWebGLSubImage
interface represents the color WebGLTexture
object for the XRCompositionLayer
to render.
The colorTexture
property can be passed to WebGL2RenderingContext.framebufferTextureLayer()
to attach the color texture to a framebuffer.
const xrGlBinding = new XRWebGLBinding(xrSession, gl);
const layer = xrGlBinding.createProjectionLayer({
textureType: "texture-array",
});
const framebuffer = gl.createFramebuffer();
xrSession.updateRenderState({ layers: [layer] });
xrSession.requestAnimationFrame(onXRFrame);
function onXRFrame(time, xrFrame) {
xrSession.requestAnimationFrame(onXRFrame);
gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);
const viewport = xrGlBinding.getSubImage(layer, xrFrame).viewport;
gl.viewport(viewport.x, viewport.y, viewport.width, viewport.height);
for (const view in xrViewerPose.views) {
const subImage = xrGlBinding.getViewSubImage(layer, view);
gl.framebufferTextureLayer(
gl.FRAMEBUFFER,
gl.COLOR_ATTACHMENT0,
subImage.colorTexture,
0,
subImage.imageIndex,
);
gl.framebufferTextureLayer(
gl.FRAMEBUFFER,
gl.DEPTH_ATTACHMENT,
subImage.depthStencilTexture,
0,
subImage.imageIndex,
);
}
}