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gecko-dev/dom/vr/VRDisplay.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_VRDisplay_h_
#define mozilla_dom_VRDisplay_h_
#include <stdint.h>
#include "mozilla/dom/TypedArray.h"
#include "mozilla/dom/VRDisplayBinding.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "mozilla/dom/DOMPoint.h"
#include "mozilla/dom/DOMRect.h"
#include "mozilla/dom/Pose.h"
#include "mozilla/TimeStamp.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsTArray.h"
#include "gfxVR.h"
namespace mozilla {
class ErrorResult;
namespace gfx {
class VRDisplayClient;
class VRDisplayPresentation;
struct VRFieldOfView;
enum class VRDisplayCapabilityFlags : uint16_t;
struct VRHMDSensorState;
} // namespace gfx
namespace dom {
class Navigator;
class VRFieldOfView final : public nsWrapperCache {
public:
VRFieldOfView(nsISupports* aParent, double aUpDegrees, double aRightDegrees,
double aDownDegrees, double aLeftDegrees);
VRFieldOfView(nsISupports* aParent, const gfx::VRFieldOfView& aSrc);
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(VRFieldOfView)
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(VRFieldOfView)
double UpDegrees() const { return mUpDegrees; }
double RightDegrees() const { return mRightDegrees; }
double DownDegrees() const { return mDownDegrees; }
double LeftDegrees() const { return mLeftDegrees; }
nsISupports* GetParentObject() const { return mParent; }
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
protected:
virtual ~VRFieldOfView() = default;
nsCOMPtr<nsISupports> mParent;
double mUpDegrees;
double mRightDegrees;
double mDownDegrees;
double mLeftDegrees;
};
class VRDisplayCapabilities final : public nsWrapperCache {
public:
VRDisplayCapabilities(nsISupports* aParent,
const gfx::VRDisplayCapabilityFlags& aFlags)
: mParent(aParent), mFlags(aFlags) {}
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(VRDisplayCapabilities)
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(VRDisplayCapabilities)
nsISupports* GetParentObject() const { return mParent; }
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
bool HasPosition() const;
bool HasOrientation() const;
bool HasExternalDisplay() const;
bool CanPresent() const;
uint32_t MaxLayers() const;
protected:
~VRDisplayCapabilities() = default;
nsCOMPtr<nsISupports> mParent;
gfx::VRDisplayCapabilityFlags mFlags;
};
class VRPose final : public Pose {
public:
VRPose(nsISupports* aParent, const gfx::VRHMDSensorState& aState);
explicit VRPose(nsISupports* aParent);
virtual void GetPosition(JSContext* aCx, JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv) override;
virtual void GetLinearVelocity(JSContext* aCx,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv) override;
virtual void GetLinearAcceleration(JSContext* aCx,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv) override;
virtual void GetOrientation(JSContext* aCx,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv) override;
virtual void GetAngularVelocity(JSContext* aCx,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv) override;
virtual void GetAngularAcceleration(JSContext* aCx,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv) override;
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
void Update(const gfx::VRHMDSensorState& aState);
protected:
~VRPose();
gfx::VRHMDSensorState mVRState;
};
struct VRFrameInfo {
VRFrameInfo();
void Update(const gfx::VRDisplayInfo& aInfo,
const gfx::VRHMDSensorState& aState, float aDepthNear,
float aDepthFar);
void Clear();
bool IsDirty();
gfx::VRHMDSensorState mVRState;
gfx::Matrix4x4 mLeftProjection;
gfx::Matrix4x4 mLeftView;
gfx::Matrix4x4 mRightProjection;
gfx::Matrix4x4 mRightView;
/**
* In order to avoid leaking information related to the duration of
* the user's VR session, we re-base timestamps.
* mTimeStampOffset is added to the actual timestamp returned by the
* underlying VR platform API when returned through WebVR API's.
*/
double mTimeStampOffset;
};
class VRFrameData final : public nsWrapperCache {
public:
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(VRFrameData)
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(VRFrameData)
explicit VRFrameData(nsISupports* aParent);
static already_AddRefed<VRFrameData> Constructor(const GlobalObject& aGlobal);
void Update(const VRFrameInfo& aFrameInfo);
// WebIDL Members
double Timestamp() const;
void GetLeftProjectionMatrix(JSContext* aCx,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv);
void GetLeftViewMatrix(JSContext* aCx, JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv);
void GetRightProjectionMatrix(JSContext* aCx,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv);
void GetRightViewMatrix(JSContext* aCx, JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv);
VRPose* Pose();
// WebIDL Boilerplate
nsISupports* GetParentObject() const { return mParent; }
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
protected:
~VRFrameData();
nsCOMPtr<nsISupports> mParent;
VRFrameInfo mFrameInfo;
RefPtr<VRPose> mPose;
JS::Heap<JSObject*> mLeftProjectionMatrix;
JS::Heap<JSObject*> mLeftViewMatrix;
JS::Heap<JSObject*> mRightProjectionMatrix;
JS::Heap<JSObject*> mRightViewMatrix;
void LazyCreateMatrix(JS::Heap<JSObject*>& aArray, gfx::Matrix4x4& aMat,
JSContext* aCx, JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv);
};
class VRStageParameters final : public nsWrapperCache {
public:
VRStageParameters(nsISupports* aParent,
const gfx::Matrix4x4& aSittingToStandingTransform,
const gfx::Size& aSize);
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(VRStageParameters)
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(VRStageParameters)
void GetSittingToStandingTransform(JSContext* aCx,
JS::MutableHandle<JSObject*> aRetval,
ErrorResult& aRv);
float SizeX() const { return mSize.width; }
float SizeZ() const { return mSize.height; }
nsISupports* GetParentObject() const { return mParent; }
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
protected:
~VRStageParameters();
nsCOMPtr<nsISupports> mParent;
gfx::Matrix4x4 mSittingToStandingTransform;
JS::Heap<JSObject*> mSittingToStandingTransformArray;
gfx::Size mSize;
};
class VREyeParameters final : public nsWrapperCache {
public:
VREyeParameters(nsISupports* aParent, const gfx::Point3D& aEyeTranslation,
const gfx::VRFieldOfView& aFOV,
const gfx::IntSize& aRenderSize);
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(VREyeParameters)
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(VREyeParameters)
void GetOffset(JSContext* aCx, JS::MutableHandle<JSObject*> aRetVal,
ErrorResult& aRv);
VRFieldOfView* FieldOfView();
uint32_t RenderWidth() const { return mRenderSize.width; }
uint32_t RenderHeight() const { return mRenderSize.height; }
nsISupports* GetParentObject() const { return mParent; }
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
protected:
~VREyeParameters();
nsCOMPtr<nsISupports> mParent;
gfx::Point3D mEyeTranslation;
gfx::IntSize mRenderSize;
JS::Heap<JSObject*> mOffset;
RefPtr<VRFieldOfView> mFOV;
};
class VRDisplay final : public DOMEventTargetHelper, public nsIObserver {
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIOBSERVER
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(VRDisplay, DOMEventTargetHelper)
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
uint32_t PresentingGroups() const;
uint32_t GroupMask() const;
void SetGroupMask(const uint32_t& aGroupMask);
bool IsAnyPresenting(uint32_t aGroupMask) const;
bool IsPresenting() const;
bool IsConnected() const;
VRDisplayCapabilities* Capabilities();
VRStageParameters* GetStageParameters();
uint32_t DisplayId() const;
void GetDisplayName(nsAString& aDisplayName) const;
// Replacing the old VRDisplayClient with the newest one to avoid
// JS needs to reload to recover VRDisplay when VRService is shutdown at the
// backend.
void UpdateDisplayClient(already_AddRefed<gfx::VRDisplayClient> aClient);
static bool RefreshVRDisplays(uint64_t aWindowId);
static void UpdateVRDisplays(nsTArray<RefPtr<VRDisplay> >& aDisplays,
nsPIDOMWindowInner* aWindow);
gfx::VRDisplayClient* GetClient() { return mClient; }
virtual already_AddRefed<VREyeParameters> GetEyeParameters(VREye aEye);
bool GetFrameData(VRFrameData& aFrameData);
already_AddRefed<VRPose> GetPose();
void ResetPose();
double DepthNear() { return mDepthNear; }
double DepthFar() { return mDepthFar; }
void SetDepthNear(double aDepthNear) {
// XXX When we start sending depth buffers to VRLayer's we will want
// to communicate this with the VRDisplayHost
mDepthNear = aDepthNear;
}
void SetDepthFar(double aDepthFar) {
// XXX When we start sending depth buffers to VRLayer's we will want
// to communicate this with the VRDisplayHost
mDepthFar = aDepthFar;
}
already_AddRefed<Promise> RequestPresent(const nsTArray<VRLayer>& aLayers,
CallerType aCallerType,
ErrorResult& aRv);
already_AddRefed<Promise> ExitPresent(ErrorResult& aRv);
void GetLayers(nsTArray<VRLayer>& result);
void SubmitFrame();
int32_t RequestAnimationFrame(mozilla::dom::FrameRequestCallback& aCallback,
mozilla::ErrorResult& aError);
void CancelAnimationFrame(int32_t aHandle, mozilla::ErrorResult& aError);
void StartVRNavigation();
void StartHandlingVRNavigationEvent();
void StopHandlingVRNavigationEvent();
bool IsHandlingVRNavigationEvent();
void OnPresentationGenerationChanged();
protected:
VRDisplay(nsPIDOMWindowInner* aWindow, gfx::VRDisplayClient* aClient);
virtual ~VRDisplay();
virtual void LastRelease() override;
void ExitPresentInternal();
void Shutdown();
void UpdateFrameInfo();
RefPtr<gfx::VRDisplayClient> mClient;
RefPtr<VRDisplayCapabilities> mCapabilities;
RefPtr<VRStageParameters> mStageParameters;
double mDepthNear;
double mDepthFar;
RefPtr<gfx::VRDisplayPresentation> mPresentation;
/**
* The WebVR 1.1 spec Requires that VRDisplay.getPose and
* VRDisplay.getFrameData must return the same values until the next
* VRDisplay.submitFrame. mFrameInfo is updated only on the first call to
* either function within one frame. Subsequent calls before the next
* SubmitFrame or ExitPresent call will use these cached values.
*/
VRFrameInfo mFrameInfo;
// Time at which we began expecting VR navigation.
TimeStamp mHandlingVRNavigationEventStart;
int32_t mVRNavigationEventDepth;
bool mShutdown;
};
} // namespace dom
} // namespace mozilla
#endif
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