1 // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // CWsGc and associated classes definitions

    15 // 

    16 //

    17 

    18 #ifndef __GC_H__

    19 #define __GC_H__

    20 

    21 #include "wnredraw.h"

    22 #include "cliwin.h"

    23 #include "graphicscontextstate.h"

    24 

    25 class CWsFbsFont;

    26 

    27 class CWsGc : public CWsObject

    28 	{

    29 	enum {ETextPtrBufLen=0x100};	// Buffer of TText, used on stack

    30 // Functions

    31 public:

    32 	static CWsGc* NewL(CWsClient *aOwner);

    33 	~CWsGc();

    34 	static void InitStaticsL();

    35 	static void DeleteStatics();

    36 	void CommandL(TInt aOpcode, const TAny *aCmdData);

    37 	void Deactivate();

    38 	inline void SetNextWinGc(CWsGc *aGc);

    39 	inline CWsGc *NextWinGc() const;

    40 	TInt ExternalizeL(CBufBase& aBuffer, TInt aStartPos);

    41 	TInt ExternalizeClippingRegionL(RWriteStream& aWriteStreem);

    42 	TInt FbsBitmapHandle(TInt aOpcode, const TWsGcCmdUnion &pData, TInt& aMaskHandle);

    43 	TInt WsBitmapHandle(TInt aOpcode, const TWsGcCmdUnion &pData, TInt& aMaskHandle);

    44 	TInt WsDrawableSourceHandle(TInt aOpcode, const TWsGcCmdUnion &aData);

    45 	void Reactivate();

    46 private:

    47 	CWsGc(CWsClient *aOwner);

    48 	void ConstructL();

    49 	void Activate(CWsClientWindow *win);

    50 	void DoDrawing2(TWsGcOpcodes aOpcode, const TWsGcCmdUnion &pData);

    51 	void SetGcAttribute(TInt aOpcode, TWsGcCmdUnion pData);

    52 	void SetOrigin(const TPoint &aOrigin);

    53 

    54 	void DoDrawing0L(TWsGcOpcodes aOpcode, const TWsGcCmdUnion &pData);

    55 	void DoDrawing1(TWsGcOpcodes aOpcode, const TWsGcCmdUnion &pData);

    56 	void Activate(const TInt &aHandle);

    57 	void DoDrawCommand(TWsGcOpcodes aOpcode, const TWsGcCmdUnion &pData);

    58 	void SetClippingRegionL(TInt aCountRegion);

    59 	void SetClippingRect(const TRect &aRect);

    60 	void CancelClippingRegion();

    61 	void DoDrawPolygon(const TWsGcCmdDrawPolygon *aDrawPolygon);

    62 	void DoDrawPolyLine(const TWsGcCmdDrawPolyLine *aDrawPolyLine, TBool aContinued);

    63 	void GcOwnerPanic(TClientPanic aPanic);

    64 	void ResetClippingRect();

    65 	void EndSegmentedPolygon();

    66 	void StartSegmentedDrawPolygonL(const TWsGcCmdStartSegmentedDrawPolygon* aDrawPolygon);

    67 	void SegmentedDrawPolygonData(const TWsGcCmdSegmentedDrawPolygonData* aDrawPolygon);

    68 	void UpdateJustification(TText* aText,TInt aLen);

    69 	void UpdateJustification(TText* aText,TInt aLen,CGraphicsContext::TTextParameters* aParam);

    70 #if defined(_DEBUG)

    71 	inline TBool IsPolyPointData() {return(iPolyPointListSize>0 || iPolyPoints!=NULL);}

    72 #endif

    73 	void ExternalizeAlphaValueL(RWriteStream& aWriteStream);

    74 	TPtrC BufferTPtr(TText* aStart,TInt aLen);

    75 	void CheckPolyData(const TAny* aDataPtr, TInt aHeaderSize, TInt aNumPoints);

    76 // Data

    77 private:

    78 	CFbsBitGc *iBackedUpWinGc;

    79 	CWsClientWindow *iWin;

    80 	CWsGc *iNextWinGc;

    81 	CWsFbsFont *iFont;

    82 	RWsRegion* iUserDefinedClippingRegion; //Clipping region that is set explicitly by the user.

    83 	TRect iClippingRect;	// All drawing clipped to this rectangle in addition to other clipping

    84 	TBool iClippingRectSet;	// ETrue if the iClippingRect is in use

    85 	TPoint iOrigin;			// User defined origin, relative to the top left of the window

    86 	TPoint iLinePos;		// Current line position for LineBy, LineTo etc

    87 	TPoint *iPolyPoints;

    88 	TInt iPolyPointListSize;

    89 	//member used for storing graphics context data for Internalize/Externalize

    90 	TInternalGcStatus iInternalStatus;

    91 	// static variables

    92 	static CFbsBitmap *iScratchBitmap;

    93 	static CFbsBitmap *iScratchMaskBitmap;

    94 	};

    95 

    96 inline void CWsGc::SetNextWinGc(CWsGc *aGc)

    97 	{

    98 	iNextWinGc=aGc;

    99 	}

   100 

   101 inline CWsGc *CWsGc::NextWinGc() const

   102 	{

   103 	return(iNextWinGc);

   104 	}

   105 

   106 #endif