////  Created by Bradley Austin Davis on 2015/06/12//  Copyright 2015 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html//#pragma once #include <QtGlobal> #include <openvr.h> #include <display-plugins/hmd/HmdDisplayPlugin.h> #include <graphics/Geometry.h> const float TARGET_RATE_OpenVr = 90.0f;  // FIXME: get from sdk tracked device property? This number is vive-only. namespace gl {    class OffscreenContext;}class OpenVrSubmitThread;class OffscreenGLCanvas;static const size_t COMPOSITING_BUFFER_SIZE = 3; struct CompositeInfo {    using Queue = std::queue<CompositeInfo>;    using Array = std::array<CompositeInfo, COMPOSITING_BUFFER_SIZE>;        gpu::TexturePointer texture;    uint32_t textureID { 0 };    glm::mat4 pose;    void* fence{ 0 };}; class OpenVrDisplayPlugin : public HmdDisplayPlugin {    using Parent = HmdDisplayPlugin;public:    bool isSupported() const override;    const QString getName() const override;    bool getSupportsAutoSwitch() override final { return true; }     glm::mat4 getEyeProjection(Eye eye, const glm::mat4& baseProjection) const override;    glm::mat4 getCullingProjection(const glm::mat4& baseProjection) const override;     void init() override;     float getTargetFrameRate() const override;    bool hasAsyncReprojection() const override { return _asyncReprojectionActive; }     void customizeContext() override;    void uncustomizeContext() override;     // Stereo specific methods    void resetSensors() override;    bool beginFrameRender(uint32_t frameIndex) override;    void cycleDebugOutput() override { _lockCurrentTexture = !_lockCurrentTexture; }     bool suppressKeyboard() override;    void unsuppressKeyboard() override;    bool isKeyboardVisible() override;     // Possibly needs an additional thread for VR submission    int getRequiredThreadCount() const override;     QString getPreferredAudioInDevice() const override;    QString getPreferredAudioOutDevice() const override;     QRectF getPlayAreaRect() override;     virtual StencilMaskMode getStencilMaskMode() const override { return StencilMaskMode::MESH; }    virtual StencilMaskMeshOperator getStencilMaskMeshOperator() override;     virtual void updateParameters(float visionSqueezeX, float visionSqueezeY, float visionSqueezeTransition,                                  int visionSqueezePerEye, float visionSqueezeGroundPlaneY,                                  float visionSqueezeSpotlightSize) override;     glm::mat4 getSensorResetMatrix() const { return _sensorResetMat; } protected:    bool internalActivate() override;    void internalDeactivate() override;    void updatePresentPose() override;     void compositeLayers() override;    void hmdPresent() override;    bool isHmdMounted() const override;    void postPreview() override; private:    vr::IVRSystem* _system { nullptr };    std::atomic<uint32_t> _keyboardSupressionCount{ 0 };     vr::HmdMatrix34_t _lastGoodHMDPose;    mat4 _sensorResetMat;    bool _threadedSubmit { true };     CompositeInfo::Array _compositeInfos;    size_t _renderingIndex { 0 };    std::shared_ptr<OpenVrSubmitThread> _submitThread;    std::shared_ptr<gl::OffscreenContext> _submitCanvas;    friend class OpenVrSubmitThread;     bool _asyncReprojectionActive { false };     bool _hmdMounted { false };     std::array<graphics::MeshPointer, 2> _stencilMeshes;    bool _stencilMeshesInitialized { false };     float _visionSqueezeX;    float _visionSqueezeY;    float _visionSqueezeTransition;    int _visionSqueezePerEye;    float _visionSqueezeGroundPlaneY;    float _visionSqueezeSpotlightSize;};