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<!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>
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