//

 //

 //

 #ifndef DISPLAY_H

 #define DISPLAY_H

 const int KMaxDisplayStringLength = 256;

 /**

 Define an interface to some basic display functionality

 */

 class DisplayBase

 	{

 public:

 	DisplayBase():iRequest(EMiniDisplayRequestNone),iPowerOn(false)

 		{	    

 		iDeviceId[0]=0;

 		iFirmwareRevision[0]=0;

 		}

 	virtual ~DisplayBase(){};

 	//

 	virtual int Open()=0;

 	virtual void Close()=0;

 	//

 	virtual int MinBrightness() const=0;

 	virtual int MaxBrightness() const=0;

 	virtual void SetBrightness(int aBrightness)=0;

 	virtual void Clear()=0;

 	virtual void Fill()=0;

 	//

 	virtual void SwapBuffers()=0;

 	//Request management

 	virtual void Request(TMiniDisplayRequest /*aRequest*/){ /*No request supported by default*/ };

 	virtual TMiniDisplayRequest AttemptRequestCompletion()=0;

 	virtual TMiniDisplayRequest CurrentRequest(){return iRequest;}

     virtual void CancelRequest(){iRequest=EMiniDisplayRequestNone;}

 	virtual bool RequestPending(){return iRequest!=EMiniDisplayRequestNone;}

     virtual bool PowerOn()	{return iPowerOn;}

 	virtual char* DeviceId() {return iDeviceId;}

 	virtual char* FirmwareRevision() {return iFirmwareRevision;}

 protected:

 	void SetRequest(TMiniDisplayRequest aRequest) { iRequest=aRequest; }

 protected:

 	char iDeviceId[KMaxDisplayStringLength];

 	char iFirmwareRevision[KMaxDisplayStringLength];

     bool iPowerOn;

 private:

 	TMiniDisplayRequest iRequest;

 	};

 /**

 */

 class GraphicDisplay : public DisplayBase

 	{

 public:

 	virtual int WidthInPixels() const=0;

 	virtual int HeightInPixels() const=0;

 	virtual void SetPixel(unsigned char aX, unsigned char aY, bool aOn)=0;

 	virtual void SetAllPixels(unsigned char aOn)=0;

 	virtual int FrameBufferSizeInBytes() const=0;

 	//virtual int BitBlit(unsigned char* aSrc, unsigned char aSrcWidth, unsigned char aSrcHeight, unsigned char aTargetX, unsigned char aTargetY) const=0;

 	};

 #endif