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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/webxr_test_constants.js"></script>
<script src="resources/webxr_util.js"></script>
<script src="resources/webxr_test_asserts.js"></script>
<script>
let fakeDeviceInitParams = TRACKED_IMMERSIVE_DEVICE;
let isValidViewport = function(viewport) {
// Ensure the returned object is an XRViewport object
assert_not_equals(viewport, null);
assert_true(viewport instanceof XRViewport);
// Ensure the viewport dimensions are valid
assert_greater_than_equal(viewport.x, 0);
assert_greater_than_equal(viewport.y, 0);
assert_greater_than_equal(viewport.width, 1);
assert_greater_than_equal(viewport.height, 1);
};
let containsViewport = function(outer, inner) {
assert_less_than_equal(inner.x, outer.x);
assert_less_than_equal(inner.y, outer.y);
assert_less_than_equal(inner.x + inner.width, outer.x + outer.width);
assert_less_than_equal(inner.y + inner.height, outer.y + outer.height);
};
let isSameViewport = function(a, b) {
return a.x == b.x && a.y == b.y && a.width == b.width && a.height == b.height;
};
let assertSameViewport = function(a, b) {
assert_equals(a.x, b.x, "viewport x should match");
assert_equals(a.y, b.y, "viewport y should match");
assert_equals(a.width, b.width, "viewport width should match");
assert_equals(a.height, b.height, "viewport height should match");
};
let testFunction = function(name, firstScale, nextFrame, session, fakeDeviceController, t) {
return session.requestReferenceSpace('viewer')
.then((space) => new Promise((resolve) => {
function onFrame(time, xrFrame1) {
let debug = xr_debug.bind(this, name);
debug('first frame');
let layer = xrFrame1.session.renderState.baseLayer;
let fullViewports = [];
let views1 = xrFrame1.getViewerPose(space).views;
for (view of views1) {
let viewport1a = layer.getViewport(view);
t.step(() => isValidViewport(viewport1a));
fullViewports.push(viewport1a);
}
// Now request a changed viewport scale. This must not change the
// viewports within this frame since they were already queried.
// If the UA supports viewport scaling, the change applies on the
// next frame. If it doesn't support viewport scaling, this call
// has no effect.
for (view of views1) {
view.requestViewportScale(firstScale);
}
t.step(() => {
for (let i = 0; i < views1.length; ++i) {
let viewport1b = layer.getViewport(views1[i]);
assertSameViewport(viewport1b, fullViewports[i]);
}
});
if (nextFrame) {
session.requestAnimationFrame((time, xrFrame2) =>
nextFrame(name, t, session, space, layer, fullViewports, xrFrame2, resolve));
} else {
// test is done
resolve();
}
}
session.requestAnimationFrame(onFrame);
}));
};
let testViewportValid = function(name, t, session, space, layer, fullViewports, xrFrame, resolve) {
let debug = xr_debug.bind(this, name);
debug('second frame');
let views = xrFrame.getViewerPose(space).views;
for (let i = 0; i < views.length; ++i) {
let viewport = layer.getViewport(views[i]);
t.step(() => isValidViewport(viewport));
t.step(() => containsViewport(fullViewports[i], viewport));
}
resolve();
};
let testScaleAppliedNextFrame = function(name, t, session, space, layer, fullViewports, xrFrame, resolve) {
let debug = xr_debug.bind(this, name);
debug('second frame');
let supportsScaling = false;
let views = xrFrame.getViewerPose(space).views;
for (let i = 0; i < views.length; ++i) {
let viewport = layer.getViewport(views[i]);
t.step(() => isValidViewport(viewport));
t.step(() => containsViewport(fullViewports[i], viewport));
if (!isSameViewport(fullViewports[i], viewport)) {
supportsScaling = true;
}
}
debug("supportsScaling=" + supportsScaling);
t.step(() => {
assert_implements_optional(supportsScaling, "requestViewportScale has no effect");
});
resolve();
};
let testScaleSameFrame = function(name, t, session, space, layer, fullViewports, xrFrame, resolve) {
let debug = xr_debug.bind(this, name);
debug('second frame');
let supportsScaling = false;
let views = xrFrame.getViewerPose(space).views;
let viewports2 = [];
for (let i = 0; i < views.length; ++i) {
let viewport2 = layer.getViewport(views[i]);
viewports2.push(viewport2);
if (!isSameViewport(fullViewports[i], viewport2)) {
supportsScaling = true;
}
}
debug("supportsScaling=" + supportsScaling);
if (!supportsScaling) {
// End the test early.
t.step(() => {
assert_implements_optional(false, "requestViewportScale has no effect");
resolve();
});
}
session.requestAnimationFrame((time, xrFrame3) => {
let views3 = xrFrame3.getViewerPose(space).views;
// Apply a new viewport scale before requesting viewports,
// this should take effect on the same frame.
for (view of views3) {
view.requestViewportScale(0.75);
}
for (let i = 0; i < views3.length; ++i) {
let viewport3 = layer.getViewport(views3[i]);
t.step(() => isValidViewport(viewport3));
t.step(() => containsViewport(fullViewports[i], viewport3));
t.step(() => containsViewport(viewport3, viewports2[i]));
t.step(() => {
// We don't know the exact expected size, but it should be in
// between the half-size and full-size viewports.
assert_false(isSameViewport(viewports2[i], viewport3));
assert_false(isSameViewport(fullViewports[i], viewport3));
});
}
resolve();
});
};
let testRecommendedScale = function(name, t, session, space, layer, fullViewports, xrFrame, resolve) {
let debug = xr_debug.bind(this, name);
debug('second frame');
let views = xrFrame.getViewerPose(space).views;
let haveRecommendedScale = false;
for (view of views) {
let recommended = view.recommendedViewportScale;
view.requestViewportScale(recommended);
if (recommended !== null && recommended !== undefined) {
haveRecommendedScale = true;
t.step(() => {
assert_greater_than(recommended, 0.0, "recommended scale invalid");
assert_less_than_equal(recommended, 1.0, "recommended scale invalid");
});
}
}
t.step(() => {
assert_implements_optional(haveRecommendedScale, "recommendedViewportScale not provided");
});
for (let i = 0; i < views.length; ++i) {
let viewport = layer.getViewport(views[i]);
t.step(() => isValidViewport(viewport));
t.step(() => containsViewport(fullViewports[i], viewport));
}
resolve();
};
for (let mode of ['inline', 'immersive-vr']) {
xr_session_promise_test(
"requestViewportScale valid viewport for " + mode + " session",
testFunction.bind(this, "valid viewport (0.5) " + mode, 0.5, testViewportValid),
fakeDeviceInitParams,
mode);
xr_session_promise_test(
"requestViewportScale valid viewport w/ null scale for " + mode + " session",
testFunction.bind(this, "valid viewport (null) " + mode, null, testViewportValid),
fakeDeviceInitParams,
mode);
xr_session_promise_test(
"requestViewportScale valid viewport w/ undefined scale for " + mode + " session",
testFunction.bind(this, "valid viewport (undefined) " + mode, null, testViewportValid),
fakeDeviceInitParams,
mode);
xr_session_promise_test(
"requestViewportScale valid viewport w/ very small scale for " + mode + " session",
testFunction.bind(this, "valid viewport (tiny) " + mode, 1e-6, testViewportValid),
fakeDeviceInitParams,
mode);
xr_session_promise_test(
"requestViewportScale applied next frame for " + mode + " session",
testFunction.bind(this, "scale applied next frame " + mode, 0.5, testScaleAppliedNextFrame),
fakeDeviceInitParams,
mode);
xr_session_promise_test(
"requestViewportScale same frame for " + mode + " session",
testFunction.bind(this, "same frame " + mode, 0.5, testScaleSameFrame),
fakeDeviceInitParams,
mode);
xr_session_promise_test(
"recommendedViewportScale for " + mode + " session",
testFunction.bind(this, "recommendedViewportScale " + mode, 0.5, testRecommendedScale),
fakeDeviceInitParams,
mode);
}
</script>
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