//

//

//

#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