// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// https://immersive-web.github.io/webxr/#xrsession-interface

enum XRSessionMode {
  "inline",
  "immersive-vr",
  "immersive-ar",
};

enum XREnvironmentBlendMode {
  "opaque",
  "additive",
  "alpha-blend",
};

enum XRVisibilityState {
  "visible",
  "visible-blurred",
  "hidden",
};

enum XRInteractionMode {
  "screen-space",
  "world-space"
};

enum XRImageTrackingScore {
  "untrackable",
  "trackable",
};

enum XRReflectionFormat {
  "srgba8",
  "rgba16f",
};

[
    ActiveScriptWrappable,
    SecureContext,
    Exposed=Window,
    RuntimeEnabled=WebXR
] interface XRSession : EventTarget {
  readonly attribute XREnvironmentBlendMode environmentBlendMode;
  readonly attribute XRInteractionMode interactionMode;
  readonly attribute XRVisibilityState visibilityState;
  [RuntimeEnabled=WebXRFrameRate] readonly attribute float? frameRate;
  [RuntimeEnabled=WebXRFrameRate] readonly attribute Float32Array? supportedFrameRates;
  [SameObject] readonly attribute XRRenderState renderState;
  [CallWith=ScriptState, MeasureAs=XRSessionGetInputSources, SameObject] readonly attribute XRInputSourceArray inputSources;
  [SameObject] readonly attribute XRDOMOverlayState domOverlayState;
  readonly attribute XRReflectionFormat preferredReflectionFormat;
  [RuntimeEnabled=WebXREnabledFeatures] readonly attribute FrozenArray<DOMString> enabledFeatures;
  [RuntimeEnabled=WebXRSpecParity] readonly attribute boolean isSystemKeyboardSupported;
  [RuntimeEnabled=WebXRLayers] readonly attribute unsigned short maxRenderLayers;

  attribute EventHandler onend;
  attribute EventHandler onselect;
  attribute EventHandler oninputsourceschange;
  attribute EventHandler onselectstart;
  attribute EventHandler onselectend;
  attribute EventHandler onvisibilitychange;
  attribute EventHandler onsqueeze;
  attribute EventHandler onsqueezestart;
  attribute EventHandler onsqueezeend;
  [RuntimeEnabled=WebXRVisibilityMask] attribute EventHandler onvisibilitymaskchange;
  [RuntimeEnabled=WebXRFrameRate] attribute EventHandler onframeratechange;

  [RaisesException] void updateRenderState(optional XRRenderStateInit init = {});
  [RuntimeEnabled=WebXRFrameRate, RaisesException] Promise<undefined> updateTargetFrameRate(float rate);
  [CallWith=ScriptState, RaisesException] Promise<XRReferenceSpace> requestReferenceSpace(XRReferenceSpaceType type);

  unsigned long requestAnimationFrame(XRFrameRequestCallback callback);
  void cancelAnimationFrame(unsigned long handle);

  [CallWith=ScriptState, Measure, RaisesException] Promise<undefined> end();

  // https://github.com/immersive-web/hit-test/blob/master/hit-testing-explainer.md
  [CallWith=ScriptState, MeasureAs=XRSessionRequestHitTestSource, RaisesException]
  Promise<XRHitTestSource> requestHitTestSource(XRHitTestOptionsInit options);
  [CallWith=ScriptState, MeasureAs=XRSessionRequestHitTestSourceForTransientInput, RaisesException]
  Promise<XRTransientInputHitTestSource> requestHitTestSourceForTransientInput(XRTransientInputHitTestOptionsInit options);

  [CallWith=ScriptState, MeasureAs=XRSessionRequestLightProbe, RaisesException]
  Promise<XRLightProbe> requestLightProbe(optional XRLightProbeInit options = {});

  [RuntimeEnabled=WebXRImageTracking, CallWith=ScriptState, MeasureAs=XRSessionGetTrackedImageScores, RaisesException]
  Promise<FrozenArray<XRImageTrackingScore>> getTrackedImageScores();

  [RaisesException]
  undefined pauseDepthSensing();
  [RaisesException]
  undefined resumeDepthSensing();

  [RuntimeEnabled=WebXRPlaneDetection, CallWith=ScriptState, RaisesException]
  Promise<undefined> initiateRoomCapture();

  [RaisesException]
  readonly attribute XRDepthUsage? depthUsage;
  [RaisesException]
  readonly attribute XRDepthDataFormat? depthDataFormat;
  [RaisesException]
  readonly attribute XRDepthType? depthType;
  [RaisesException]
  readonly attribute boolean? depthActive;
};