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+/************************************************************************************
+
+Filename    :   OVR_Linux_HMDDevice.h
+Content     :   Linux HMDDevice implementation
+Created     :   June 17, 2013
+Authors     :   Brant Lewis
+
+Copyright   :   Copyright 2014 Oculus VR, Inc. All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.1 (the "License"); 
+you may not use the Oculus VR Rift SDK except in compliance with the License, 
+which is provided at the time of installation or download, or which 
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.1 
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK 
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+*************************************************************************************/
+
+#ifndef OVR_Linux_HMDDevice_h
+#define OVR_Linux_HMDDevice_h
+
+#include "OVR_Linux_DeviceManager.h"
+#include "OVR_Profile.h"
+
+namespace OVR { namespace Linux {
+
+class HMDDevice;
+
+//-------------------------------------------------------------------------------------
+
+// HMDDeviceFactory enumerates attached Oculus HMD devices.
+//
+// This is currently done by matching monitor device strings.
+
+class HMDDeviceFactory : public DeviceFactory
+{
+public:
+    static HMDDeviceFactory &GetInstance();
+
+    // Enumerates devices, creating and destroying relevant objects in manager.
+    virtual void EnumerateDevices(EnumerateVisitor& visitor);
+
+protected:
+    DeviceManager* getManager() const { return (DeviceManager*) pManager; }
+};
+
+
+class HMDDeviceCreateDesc : public DeviceCreateDesc
+{
+    friend class HMDDevice;
+
+protected:
+    enum
+    {
+        Contents_Screen     = 1,
+        Contents_Distortion = 2,
+    };
+    String              DeviceId;
+    String              DisplayDeviceName;
+    struct
+    {
+        int             X, Y;
+    }                   Desktop;
+    unsigned int        Contents;
+
+    Sizei               ResolutionInPixels;
+    Sizef               ScreenSizeInMeters;
+    float               VCenterFromTopInMeters;
+    float               LensSeparationInMeters;
+
+    // TODO: update these to splines.
+    DistortionEqnType   DistortionEqn;
+    float               DistortionK[4];
+
+    long                DisplayId;
+
+public:
+    HMDDeviceCreateDesc(DeviceFactory* factory,
+                        const String& displayDeviceName, long dispId);
+    HMDDeviceCreateDesc(const HMDDeviceCreateDesc& other);
+
+    virtual DeviceCreateDesc* Clone() const
+    {
+        return new HMDDeviceCreateDesc(*this);
+    }
+
+    virtual DeviceBase* NewDeviceInstance();
+
+    virtual MatchResult MatchDevice(const DeviceCreateDesc& other,
+                                    DeviceCreateDesc**) const;
+
+    // Matches device by path.
+    virtual bool        MatchDevice(const String& path);
+
+    virtual bool        UpdateMatchedCandidate(const DeviceCreateDesc&, bool* newDeviceFlag = NULL);
+
+    virtual bool GetDeviceInfo(DeviceInfo* info) const;
+
+    void  SetScreenParameters(int x, int y,
+                              int hres, int vres,
+                              float hsize, float vsize,
+                              float vCenterFromTopInMeters, float lensSeparationInMeters);
+    void SetDistortion(const float* dks);
+   
+    HmdTypeEnum GetHmdType() const;
+};
+
+
+//-------------------------------------------------------------------------------------
+
+// HMDDevice represents an Oculus HMD device unit. An instance of this class
+// is typically created from the DeviceManager.
+//  After HMD device is created, we its sensor data can be obtained by 
+//  first creating a Sensor object and then wrappig it in SensorFusion.
+
+class HMDDevice : public DeviceImpl<OVR::HMDDevice>
+{
+public:
+    HMDDevice(HMDDeviceCreateDesc* createDesc);
+    ~HMDDevice();    
+
+    virtual bool Initialize(DeviceBase* parent);
+    virtual void Shutdown();
+
+    // Requests the currently used default profile. This profile affects the
+    // settings reported by HMDInfo. 
+    virtual Profile*    GetProfile();
+    virtual const char* GetProfileName();
+    virtual bool        SetProfileName(const char* name);
+
+    // Query associated sensor.
+    virtual OVR::SensorDevice* GetSensor();  
+
+protected:
+    HMDDeviceCreateDesc* getDesc() const { return (HMDDeviceCreateDesc*)pCreateDesc.GetPtr(); }
+
+    // User name for the profile used with this device.
+    String               ProfileName;
+    mutable Ptr<Profile> pCachedProfile;
+};
+
+
+}} // namespace OVR::Linux
+
+#endif // OVR_Linux_HMDDevice_h
+