bfxpixop.h

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// $Id: bfxpixop.h 1282 2006-06-09 09:46:49Z alex $
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================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
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----------------------------------

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=================================XARAHEADEREND============================
 */
// This is the header file for the bitmap effect pixop class

/*
*/

#ifndef INC_BFXPIXOP
#define INC_BFXPIXOP

//#include "ccobject.h" - in camtypes.h [AUTOMATICALLY REMOVED]

class KernelBitmap;

typedef struct
{
    INT32 rsum;
    INT32 gsum;
    INT32 bsum;
    INT32 pixels;
    INT32 index;
} QuantisationCell;


/********************************************************************************************

>   class BfxPixelOp : public CCObject

    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/1994
    Purpose:    Pixel operator

The tracing stuff uses this class to determine whether or not a pixel should be traced or
not.

********************************************************************************************/

#define __bfxpixop_xy(x,y) Base[(x)+(y)*Width]

class BfxPixelOp : public CCObject
{
    CC_DECLARE_DYNCREATE(BfxPixelOp);

    public:

    BfxPixelOp();            /* Constructor */
    virtual ~BfxPixelOp();       /* Destructor */

    virtual BOOL Reset();

    virtual BOOL SetBitmap(KernelBitmap * pKB, DWORD theCacheStateMask, DWORD theCacheValueMask, BOOL theDefaultValue);
    
    virtual inline BOOL IsInRegion(INT32 x, INT32 y) {return DefaultValue;}

    virtual inline BOOL ClearCachedArea() {return TRUE;};
    virtual inline BOOL ClearEntireCache() {return TRUE;};
    virtual BOOL SetAuxilliaryBitmaps(KernelBitmap * pProposed /*A*/, KernelBitmap * pCurrent /*B*/,
                              KernelBitmap * pOriginal /*T*/, INT32 Threshold, DWORD theColour);

    virtual inline BOOL CheckMinimumArea(INT32 MinimumArea, INT32 InitialX, INT32 InitialY, BOOL * FoundRegion)
                            {*FoundRegion = FALSE; return TRUE;};

    virtual inline DWORD ReadPixel(void * Image, INT32 p) { return 0; }
    virtual inline void TranslateToRGB(DWORD Colour, KernelBitmap * pKB, INT32 * R, INT32 * G, INT32 * B)
        { *R = (INT32)(Colour >>16) & 0x0FF; *G = (INT32)(Colour>>8) & 0x0FF; *B = (INT32)(Colour/*>>0*/) & 0x0FF;return;};

    inline DWORD ReadOriginalPixel(INT32 x, INT32 y)
        { return ReadPixel((void *)pT, x+y*WidthRounded); };

    virtual inline DWORD ReadBPixel(INT32 x, INT32 y)
        { return ReadPixel((void *)pB, x+y*WidthRounded); };

    inline DWORD ReadPixel(void * Image, INT32 x, INT32 y) { return ReadPixel(Image, x+y*WidthRounded); };

    virtual inline void WritePixel(void * Image, INT32 p, DWORD Value) { return; }
    virtual inline DWORD TranslateToDWORD(KernelBitmap * pKB, INT32 R, INT32 G, INT32 B)
        { return ((R & 0xFF)<<16) | ((G & 0xFF)<<8) | (B & 0xFF); };

    inline void WriteOriginalPixel(INT32 x, INT32 y, DWORD Value)
        { WritePixel((void *)pT, x+y*WidthRounded, Value); return; };

    inline void WritePixel(void * Image, INT32 x, INT32 y, DWORD Value) { WritePixel(Image, x+y*WidthRounded, Value); return;};

    protected:

    virtual BOOL IsPixelReallyInRegion(INT32 x, INT32 y);

    DWORD * Base;
    INT32 Height;
    INT32 Width;
    INT32 WidthRounded;
    DWORD Size;
    BOOL DefaultValue;

    INT32 BPP;

    DWORD * pA;
    DWORD * pB;
    DWORD * pT;
    DWORD Colour;
    INT32 Value;

};

/********************************************************************************************

>   class BfxPixelOp32 : public BfxPixelOp

    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/1994
    Purpose:    32 bit Pixel operator

This class caches the state of a pixel in 2 bits of an otherwised top byte of a 32 bit bitmap.

********************************************************************************************/

#define __bfxpixop_xy(x,y) Base[(x)+(y)*Width]

class BfxPixelOp32 : public BfxPixelOp
{
    CC_DECLARE_DYNCREATE(BfxPixelOp32);

    public:

    BfxPixelOp32();          /* Constructor */
    virtual ~BfxPixelOp32();         /* Destructor */

    virtual BOOL Reset();

    virtual BOOL SetBitmap(KernelBitmap * pKB, DWORD theCacheStateMask, DWORD theCacheValueMask, BOOL theDefaultValue);
    
    inline BOOL IsCached(INT32 x, INT32 y) { return (( (DWORD)x>=(DWORD)Width ) || ( (DWORD)y>=(DWORD)Height ) || (!Base))?
                                                DefaultValue:((__bfxpixop_xy(x,y) & CacheStateMask)!=0); };
    virtual inline BOOL IsInRegion(INT32 x, INT32 y) {
        if (( (DWORD)x>=(DWORD)Width ) || ( (DWORD)y>=(DWORD)Height ) || (!Base)) return DefaultValue;
        DWORD *pix = &__bfxpixop_xy(x,y);
        BOOL val;
        return (((*pix) & CacheStateMask)!=0)?(((*pix) & CacheValueMask)!=0):
        (val=GetValueAdjustCache(x,y),(*pix)=((*pix)&~CacheValueMask) | CacheStateMask | (val?CacheValueMask:0),val);
        };
    virtual BOOL ClearCachedArea();
    virtual BOOL ClearEntireCache();

    virtual inline DWORD ReadPixel(void * Image, INT32 p)
    {
        if ((((DWORD)p)>=Size)||!Image)
        {
            ERROR3("Out of range BfxPixOp::ReadPixel()");
            return 0;
        }
        return ((DWORD *) Image)[p];
    };

    virtual inline void WritePixel(void * Image, INT32 p, DWORD Value)
    {
        if ((((DWORD)p)>=Size)||!Image)
        {
            ERROR3("Out of range BfxPixOp::WritePixel()");
            return;
        }
        ((DWORD *) Image)[p]=Value;
        return;
    };

    inline INT32 GetCacheMarks() { return CacheMarks; };

    virtual BOOL CheckMinimumArea(INT32 MinimumArea, INT32 InitialX, INT32 InitialY, BOOL * FoundRegion);

    protected:

    virtual BOOL GetValueAdjustCache(INT32 x, INT32 y);
    virtual BOOL FloodSearch(INT32 x, INT32 y, INT32 MinimumArea);

    DWORD CacheStateMask;
    DWORD CacheValueMask;
    INT32 CacheMarks;

    INT32 MinX;
    INT32 MinY;
    INT32 MaxX;
    INT32 MaxY;
};

/********************************************************************************************

>   class BfxPixelOpPseudo : public BfxPixelOp

    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/1994
    Purpose:    32 bit Pixel operator

This pixcel op handles pseudocolour bitmaps on an equality basis

********************************************************************************************/

#define __bfxpixopl2_xy(x,y) (((Base[(x>>Log2BPP)+(y)*WidthRounded]) >> (x & XMask)) & BPPMask)

// this is the maximum minimum area that can be used
#define BFX_PSEUDOFLOODSIZE 256

class BfxPixelOpPseudo : public BfxPixelOp
{
    CC_DECLARE_DYNCREATE(BfxPixelOpPseudo);

    public:

    BfxPixelOpPseudo();          /* Constructor */
    virtual ~BfxPixelOpPseudo();         /* Destructor */

    virtual BOOL Reset();

    virtual BOOL SetBitmap(KernelBitmap * pKB, DWORD theCacheStateMask, DWORD theCacheValueMask, BOOL theDefaultValue);
    
    virtual inline BOOL IsInRegion(INT32 x, INT32 y) {
        if (( (DWORD)x>=(DWORD)Width ) || ( (DWORD)y>=(DWORD)Height ) ) return DefaultValue;
        else return IsPixelReallyInRegion(x, y);};

    virtual void TranslateToRGB(DWORD Colour, KernelBitmap * pKB, INT32 * R, INT32 * G, INT32 * B);

    virtual inline DWORD ReadPixel(void * Image, INT32 p)
    {
        if ( (((DWORD)p)>=Size)||!Image)
        {
            ERROR3("Out of range BfxPixOp::ReadPixel()");
            return 0;
        }
        return (DWORD)(((((BYTE *) Image)[p>>XShift])>>((XMask-(p & XMask))<<Log2BPP))&BPPMask);
    };

    virtual inline void WritePixel(void * Image, INT32 p, DWORD Value)
    {
        if ( (((DWORD)p)>=Size)||!Image)
        {
            ERROR3("Out of range BfxPixOp::ReadPixel()");
            return;
        }
        BYTE * thebyte = &(((BYTE *) Image)[p>>XShift]);
        INT32 shift = ((XMask-(p & XMask))<<Log2BPP);
        *thebyte = (BYTE)(((*thebyte) & ~(BPPMask<<shift)) | ((Value & BPPMask)<<shift));
        return;
    };

    virtual BOOL CheckMinimumArea(INT32 MinimumArea, INT32 InitialX, INT32 InitialY, BOOL * FoundRegion);

    protected:

    BOOL FloodSearch(INT32 x, INT32 y, INT32 MinimumArea,
                  INT32 FloodArray[BFX_PSEUDOFLOODSIZE][2], INT32 * FloodTop);


    INT32 Log2BPP;
    INT32 XShift;
    INT32 XMask;
    INT32 BPPMask;
};

/********************************************************************************************

>   class BfxPixelOp24 : public BfxPixelOp

    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/1994
    Purpose:    32 bit Pixel operator

This pixcel op handles pseudocolour bitmaps on an equality basis

THIS PIXEL OP IS ONLY VERY PARTIALLY IMPLEMENTED - IT ONLY READS B PIXELS

********************************************************************************************/

#define __bfxpixopl2_xy(x,y) (((Base[(x>>Log2BPP)+(y)*WidthRounded]) >> (x & XMask)) & BPPMask)

class BfxPixelOp24 : public BfxPixelOp
{
    CC_DECLARE_DYNCREATE(BfxPixelOp24);

    BfxPixelOp24() : BfxPixelOp() { BPP=24; };

    public:

    virtual inline DWORD ReadBPixel(INT32 x, INT32 y)
        { return *((DWORD *)&( ((BYTE *)(pB))[y*(((Width*3)+3)&~3)+(x*3)] ) ) &0x00FFFFFF; };
    
};

/********************************************************************************************

>   class BfxPositivePixelOp : public BfxPixelOp32

    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/1994
    Purpose:    Pixel operator

PixelOp that determines whether a pixel is better by more than a given amount in one bitmap
than in another

********************************************************************************************/

class BfxPositivePixelOp : public BfxPixelOp32
{
    CC_DECLARE_DYNCREATE(BfxPositivePixelOp);

    protected:
    
    virtual BOOL IsPixelReallyInRegion(INT32 x, INT32 y);
    
};

/********************************************************************************************

>   class BfxThresholdPixelOp : public BfxPixelOp32

    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/1994
    Purpose:    Pixel operator

PixelOp that determines whether a pixel is better by more than a given amount in one bitmap
than in another

********************************************************************************************/

class BfxThresholdPixelOp : public BfxPixelOp32
{
    CC_DECLARE_DYNCREATE(BfxThresholdPixelOp);

    protected:

    virtual BOOL IsPixelReallyInRegion(INT32 x, INT32 y);

};

/********************************************************************************************

>   class BfxColourThresholdPixelOp : public BfxPixelOp32

    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/1994
    Purpose:    Pixel operator

PixelOp that determines whether a pixel is better by more than a given amount in one bitmap
than in another

********************************************************************************************/

class BfxColourThresholdPixelOp : public BfxPixelOp32
{
    CC_DECLARE_DYNCREATE(BfxColourThresholdPixelOp);

    protected:

    virtual BOOL IsPixelReallyInRegion(INT32 x, INT32 y);

};

/********************************************************************************************

>   class BfxPositivePixelOpPseudo : public BfxPixelOpPseudo

    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/1994
    Purpose:    Pixel operator

PixelOp that determines whether a pixel is better by more than a given amount in one bitmap
than in another

********************************************************************************************/

class BfxPositivePixelOpPseudo : public BfxPixelOpPseudo
{
    CC_DECLARE_DYNCREATE(BfxPositivePixelOpPseudo);

    protected:
    
    virtual BOOL IsPixelReallyInRegion(INT32 x, INT32 y);
    
};

/********************************************************************************************

>   class BfxThresholdPixelOpPseudo : public BfxPixelOpPseudo

    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/1994
    Purpose:    Pixel operator

PixelOp that determines whether a pixel is better by more than a given amount in one bitmap
than in another

********************************************************************************************/

class BfxThresholdPixelOpPseudo : public BfxPixelOpPseudo
{
    CC_DECLARE_DYNCREATE(BfxThresholdPixelOpPseudo);

    protected:

    virtual BOOL IsPixelReallyInRegion(INT32 x, INT32 y);

};

/********************************************************************************************

>   class BfxColourThresholdPixelOpPseudo : public BfxPixelOpPseudo

    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/1994
    Purpose:    Pixel operator

PixelOp that determines whether a pixel is better by more than a given amount in one bitmap
than in another

********************************************************************************************/

class BfxColourThresholdPixelOpPseudo : public BfxPixelOpPseudo
{
    CC_DECLARE_DYNCREATE(BfxColourThresholdPixelOpPseudo);

    protected:

    virtual BOOL IsPixelReallyInRegion(INT32 x, INT32 y);

};

/********************************************************************************************

>   class Octree : public CCObject

    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/10/1994
    Purpose:    Colour octree

********************************************************************************************/

class OctreeElement : public SimpleCCObject
{
    public:

    OctreeElement() { pParent=pListNext=pListPrev=NULL; for (INT32 c=0; c<8; c++) pChildren[c]=NULL;
                      Pixels=Depth=R=G=B=NumChildren=0;Index=-1;};
    ~OctreeElement() {
            for (INT32 c=0; c<8; c++) if (pChildren[c])
            {
                delete (pChildren[c]);
                pChildren[c]=NULL;
            }
            pParent=pListNext=pListPrev=NULL;Pixels=Depth=R=G=B=NumChildren=0;Index=-1;
        };

    INT32 Depth;
    INT32 R;
    INT32 G;
    INT32 B;
    INT32 Index;
    INT32 Pixels;
    INT32 NumChildren;
    OctreeElement * pChildren[8];
    OctreeElement * pParent;
    OctreeElement * pListNext;
    OctreeElement * pListPrev;
};

class Octree : public CCObject
{
    CC_DECLARE_DYNCREATE(Octree);

    public:

    Octree();            /* Constructor */
    ~Octree();       /* Destructor */

    BOOL Init(INT32 NumColours);
    BOOL Insert(INT32 r, INT32 g, INT32 b);
    BOOL Index(RGBQUAD * Palette, OctreeElement * pEl=NULL);
    INT32 GetIndex(INT32 r, INT32 g, INT32 b);

    private:

    OctreeElement * GetElement(INT32 r, INT32 g, INT32 b);
    void CheckIntegrity();
    void Unlink(OctreeElement * pEl);
    void Link(OctreeElement * pEl);

    INT32 MaxLeaves;
    INT32 CurrentLeaves;
    OctreeElement * pTopElement;
    INT32 CurrentIndex;

    OctreeElement * ListHead[9 /*depth 0-8*/ ][9 /*children 0-8*/ ];

};




#endif

---