xrViewport_valid.https.html

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This test has a WPT meta file that expects 4 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /webxr/xrViewport_valid.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="resources/webxr_util.js"></script>

<script src="resources/webxr_test_constants.js"></script>

<script>

let testName = "XRViewport attributes are valid";

let fakeDeviceInitParams = TRACKED_IMMERSIVE_DEVICE;

let testFunction = function(session, fakeDeviceController, t, sessionObjects) {

  return session.requestReferenceSpace('local')

    .then((referenceSpace) => new Promise((resolve) =>{

      let webglLayer = sessionObjects.glLayer;

      function onFrame(time, xrFrame) {

        t.step(() => {

          let pose = xrFrame.getViewerPose(referenceSpace);

          assert_not_equals(pose, null);

          assert_not_equals(pose.views, null);

          if (session.sessionInit['optionalFeatures'].includes('secondary-views')) {

            assert_equals(pose.views.length, 3);

          } else {

            assert_equals(pose.views.length, 2);

          // Ensure the views report the expected viewports into the WebGL layer.

          for (let i = 0; i < pose.views.length; i++) {

            let view = pose.views[i];

            let viewport = webglLayer.getViewport(view);

            assert_not_equals(viewport, null);

            assert_true(viewport instanceof XRViewport);

            // Exact viewport values don't matter, but they must pass several tests:

            // Viewports have non-zero widths and heights.

            assert_greater_than(viewport.width, 0);

            assert_greater_than(viewport.height, 0);

            // Viewports are located within the framebuffer.

            assert_greater_than_equal(viewport.x, 0);

            assert_greater_than_equal(viewport.y, 0);

            assert_less_than_equal(

              viewport.x + viewport.width, webglLayer.framebufferWidth);

            assert_less_than_equal(

              viewport.y + viewport.height, webglLayer.framebufferHeight);

              // Assume that the viewports are ordered from left to right. This is

            // not a requirement by the WebXR spec, but is a sanity check since

            // this is how Blink orders them.

            if (i != 0) {

              let previousView = pose.views[i - 1];

              let previousViewport = webglLayer.getViewport(previousView);

              assert_less_than_equal(previousViewport.x + previousViewport.width, viewport.x);

});

        resolve();

      session.requestAnimationFrame(onFrame);

  }));

};

xr_session_promise_test(

  testName, testFunction, fakeDeviceInitParams, 'immersive-vr',

  {'optionalFeatures': []});

xr_session_promise_test(

  testName + ' with secondary views requested', testFunction, fakeDeviceInitParams, 'immersive-vr',

  {'optionalFeatures': ['secondary-views']});

</script>