/*

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

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

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  General functions

*

*/

#ifndef M2GUTILS_H

#define M2GUTILS_H

// INCLUDE FILES

#include <gdi.h> // DisplayMode, Draw, BitBlt

#include <fbs.h> // CFbsBitmap

#include "M2GGeneral.h"

#include <QPixmap>

#include <jni.h>

M2G_NS_START

// CONSTANTS

// DATA TYPES

// MACROS

// FORWARD DECLARATIONS

class CFbsBitmapDevice;

class CFbsBitGc;

// FUNCTION PROTOTYPES

// CLASS DECLARATION

/**

 * @class M2GBitmapUtils

 * @brief Static methods for alpha blending and bitmaps

 */

class M2GBitmapUtils

{

public: // STATIC METHODS

    /**

     * Blits two bitmap

     * @since Series S60 3.0

     * @param aTarget Target bitmap.

     * @param aSource Source bitmap.

     * @param aPoint Position for the top left corner of the bitmap.

     * @param aRect  Rectangle defining the piece of the bitmap to be drawn.

     * @param aSourceMask Mask.

     * @return M2G_OK if ok

     */

    static TInt BitBlt(CFbsBitmap& aTarget,

                       const CFbsBitmap& aSource,

                       const TPoint& aPoint,

                       const TRect* aRect = NULL,

                       const CFbsBitmap* aSourceMask = NULL);

    static TInt BitBlt(CBitmapContext& aTargetContext,

                       const CFbsBitmap& aSource,

                       const TPoint& aPoint,

                       const TRect* aRect,

                       const CFbsBitmap* aSourceMask,

                       /*MSwtClient* aClientHandle,*/

                       TBool aUseNativeClear = EFalse);

    static TInt BitQBlt(QImage& aTargetQimage,

    /**

     * Checks if two bitmap are equal.

     * @since Series S60 3.0

     * @param aLhs Left side bitmap

     * @param aRhs Right side bitmap

     * @return ETrue if bitmaps are equal.

     */

    inline static TBool Equals(const CFbsBitmap& aLhs, const CFbsBitmap& aRhs)

    {

        return (aLhs.SizeInPixels() == aRhs.SizeInPixels());

    }

    /**

     * Checks if a bitmap has same values as given values.

     * @since Series S60 3.0

     * @param aBitmap Bitmap

     * @param aSz Size in pixels.

     * @param aMode Display mode.

     * @return ETrue if bitmaps are equal.

     */

    inline static TBool Equals(

        const CFbsBitmap& aBitmap,

        const TSize& aSz,

        const TDisplayMode* aMode)

    {

        return (((aBitmap.SizeInPixels() == aSz) &&

                 ((aMode == NULL) || (aBitmap.DisplayMode() == *aMode))

                ) ? ETrue : EFalse);

    }

    /**

     * Return byte per pixel

     * @since Series S60 3.1

     * @param aBitmap

     * @param aRhs Right side bitmap

     * @return ETrue if bitmaps are equal.

     */

    inline static TInt BytesPerPixel(const CFbsBitmap& aBitmap)

    {

        switch (aBitmap.DisplayMode())

        {

        case EGray256 :

        case EColor256 :

            return 1;

        case EColor64K :

            return 2;

        case EColor16M :

        case EColor16MU :

        case EColor16MA :

            return 4;

        default :

            return 0;

        }

    }

};

//-----------------------------------------------------------------------------

// Creating integer 'handles' from C++ objects for referencing them inside Java

// The shift garauntees a positive integer, so object creation native methods

// can overload the return value to be a handle or an error code

//

// Unhanding the integer requires the destination type to be known, so is

// implemented as a template function, it should be invoked as

//

//      CXyz* xyz=JavaUnhand(aHandle);

//

const TInt KJavaHandleShift=2;

inline TInt JavaMakeHandle(const TAny* aObject)

{

    return reinterpret_cast<TUint>(aObject)>>KJavaHandleShift;

}

template <typename T>

inline T* JavaUnhand(TInt aHandle)

{

    return reinterpret_cast<T*>(aHandle<<KJavaHandleShift);

}

//----------------------------------------------------------------------------

/* Takes an EPOC string and returns a Java JNI string */

inline jstring CreateJavaString(JNIEnv& aJni, const TDesC16& aString)

{

    const jchar* stringPtr = aString.Ptr();

    const jsize stringLength = aString.Length();

    jstring jniString = aJni.NewString(stringPtr, stringLength);

    return jniString;

}

/**

 * @class TM2GRenderRect

 * @brief Class for handling rendering rectangle

 */

class TM2GRenderRect : public TRect

{

private:

    // NOTE ELength should be always the last one and indexing

    // should start from 0

    enum TArrayIndexes

    {

        EAnchorX = 0,

        EAnchorY = 1,

        EClipX = 2,

        EClipY = 3,

        EClipW = 4,

        EClipH = 5,

        ELength

    };

public: // METHODS

    /**

     * Ctor

     * @since Series S60 3.0

     * @param aAnchorX X anchor

     * @param aAnchorY Y anchor

     * @param aClipX Clip x

     * @param aClipY Clip y

     * @param aClipWidth Clip width

     * @param aClipHeight Clip height

     */

    TM2GRenderRect(

        TInt aAnchorX, TInt aAnchorY,

        TInt aClipX, TInt aClipY,

        TInt aClipW, TInt aClipH);

    /**

     * Ctor

     * @since Series S60 3.0

     * @param aDimensions Dimensions. @see TArrayIndexes.

     * @param aLength Array length

     */

    TM2GRenderRect(TInt* aDimensions, TInt aLength);

    /**

     * Copy ctor

     * @since Series S60 3.0

     * @param aRd

     */

    TM2GRenderRect(const TM2GRenderRect& aRd);

    /**

     * Assignment operator

     * @since Series S60 3.0

     * @param aRd

     * @return TM2GRenderRect

     */

    TM2GRenderRect& operator=(const TM2GRenderRect& aRd);

    /**

     * Dtor

     * @since Series S60 3.0

     */

    virtual ~TM2GRenderRect();

    /**

     * Returns x anchor

     * @since Series S60 3.0

     * @return X anchor

     */

    inline TInt GetAnchorX()

    {

        return iAnchorX;

    }

    /**

     * Returns y anchor

     * @since Series S60 3.0

     * @return Y anchor

     */

    inline TInt GetAnchorY()

    {

        return iAnchorY;

    }

    /**

     * Returns clip height

     * @since Series S60 3.0

     * @return Clip height

     */

    inline TInt GetClipH()

    {

        return Height();

    }

    /**

     * Returns x clip

     * @since Series S60 3.0

     * @return X clip

     */

    inline TInt GetClipX()

    {

        return iTl.iX;

    }

    /**

     * Returns y clip

     * @since Series S60 3.0

     * @return Y clip

     */

    inline TInt GetClipY()

    {

        return iTl.iY;

    }

    /**

     * Returns clip width

     * @since Series S60 3.0

     * @return Clip width

     */

    inline TInt GetClipW()

    {

        return Width();

    }

    /**

     * Sets x anchor

     * @since Series S60 3.0

     * @param aX X anchor

     */

    inline void SetAnchorX(TInt aX)

    {

        iAnchorX = aX;

    }

    /**

     * Sets y anchor

     * @since Series S60 3.0

     * @param aY Y anchor

     */

    inline void SetAnchorY(TInt aY)

    {

        iAnchorY = aY;

    }

    /**

     * Sets clip height

     * @since Series S60 3.0

     * @param aH Clip height

     */

    inline void SetClipH(TInt aH)

    {

        SetHeight(aH);

    }

    /**

     * Sets x clip

     * @since Series S60 3.0

     * @param aX X clip

     */

    inline void SetClipX(TInt aX)

    {

        iTl.iX = aX;

    }

    /**

     * Sets y clip

     * @since Series S60 3.0

     * @param aY Y clip

     */

    inline void SetClipY(TInt aY)

    {

        iTl.iY = aY;

    }

    /**

     * Sets clip width

     * @since Series S60 3.0

     * @param aW Clip width

     */

    inline void SetClipW(TInt aW)

    {

        SetWidth(aW);

    }

public: // STATIC METHODS

    /**

     * Gets region size

     * @since Series S60 3.0

     * @param aRect Render dimensions

     * @param aSz Source surface size

     * @return Region size to be paint

     */

    static TSize GetRegionSizeInPixels(

        TM2GRenderRect& aRect,

        const TSize& aSz);

public: // VARIABLES

    TInt iAnchorX;

    TInt iAnchorY;

};

/**

 * @class TM2GBitmapLock

 * @brief Bitmap autolocker

 */

class TM2GBitmapLock

{

public: // METHODS

    /**

     * Ctor

     * @param aBitmap Bitmap

     * @param aLock If ETrue then bitmap is locked by ctor.

     */

    TM2GBitmapLock(const CFbsBitmap* aBitmap, TBool aLock = ETrue);

    /**

     * Dtor

     * @since Series S60 3.0

     */

    virtual ~TM2GBitmapLock();

    /**

     * Locks bitmap heap

     * @since Series S60 3.0

     */

    void Lock();

    /**

     * Unlocks bitmap heap

     * @since Series S60 3.0

     */

    void Unlock();

protected: // METHODS

    /**

     * Copy ctor

     * @since Series S60 3.0

     * @param aRd

     */

    TM2GBitmapLock(const TM2GBitmapLock& aRd);

    /**

     * Assignment operator

     * @since Series S60 3.0

     * @param aRd

     * @return TM2GBitmapLock

     */

    TM2GBitmapLock& operator=(const TM2GBitmapLock& aRd);

public: // VARIABLES

    const CFbsBitmap* iBitmap;

    TBool iIsLocked;

};

class TSWTBitBlt/*: public MSwtFunctor*/

{

public:

    TSWTBitBlt(CBitmapContext& aTargetContext,

               const TPoint& aPoint,

               const CFbsBitmap* aBitmap,

               const TRect* aSourceRect,

               const CFbsBitmap* aMaskBitmap,

               TBool aUseNativeClear);

    void operator()() const;

    CBitmapContext& iTargetContext;

    const TPoint iPoint;

    const CFbsBitmap* iBitmap;

    const TRect* iRect;

    const CFbsBitmap* iMaskBitmap;

    TBool iUseNativeClear;

};

M2G_NS_END

#endif // M2GUTILS_H