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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) {
let pose = xrFrame.getViewerPose(referenceSpace);
assert_not_equals(pose, null);
assert_not_equals(pose.views, null);
assert_equals(pose.views.length, 2);
let leftView = pose.views[0];
let rightView = pose.views[1];
let leftViewport = webglLayer.getViewport(leftView);
let rightViewport = webglLayer.getViewport(rightView);
t.step(() => {
// Ensure the views report the expected viewports into the WebGL layer.
assert_true(leftViewport instanceof XRViewport);
assert_true(rightViewport instanceof XRViewport);
assert_not_equals(leftViewport, null);
assert_not_equals(rightViewport, null);
// Exact viewport values don't matter, but they must pass several tests:
// Viewports have non-zero widths and heights.
assert_greater_than(leftViewport.width, 0);
assert_greater_than(leftViewport.height, 0);
assert_greater_than(rightViewport.width, 0);
assert_greater_than(rightViewport.height, 0);
// Viewports are located within the framebuffer.
assert_greater_than_equal(leftViewport.x, 0);
assert_greater_than_equal(leftViewport.y, 0);
assert_greater_than_equal(leftViewport.x, 0);
assert_greater_than_equal(leftViewport.y, 0);
assert_less_than_equal(
leftViewport.x + leftViewport.width, webglLayer.framebufferWidth);
assert_less_than_equal(
leftViewport.y + leftViewport.height, webglLayer.framebufferHeight);
assert_less_than_equal(
rightViewport.x + rightViewport.width, webglLayer.framebufferWidth);
assert_less_than_equal(
rightViewport.y + rightViewport.height, webglLayer.framebufferHeight);
// Assumes that the left viewport will always be physically to the left
// of the right viewport.
assert_less_than_equal(leftViewport.x + leftViewport.width, rightViewport.x);
});
resolve();
}
session.requestAnimationFrame(onFrame);
}));
};
xr_session_promise_test(
testName, testFunction, fakeDeviceInitParams, 'immersive-vr');
</script>
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