bitmap.h

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// $Id: bitmap.h 1708 2006-08-17 17:13:38Z gerry $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
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----------------------------------

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=================================XARAHEADEREND============================
 */

// kernel class to encompass bitmaps

#ifndef INC_BITMAP
#define INC_BITMAP

#include "listitem.h"
#include "doccolor.h"
#include "gradtype.h"
#include "doccomp.h"
//#include "gifutil.h"
#include "outptgif.h"
//#include "xmlutils.h"
#include "dibutil.h"

class OILBitmap;
class KernelBitmapRef;
class BitmapInfo;
class RenderRegion;
class Filter;
class FillGeometryAttribute;
class BitmapList;
class Document;
class BaseBitmapFilter;
class BaseCamelotFilter;
class CCLexFile;
class View;
class BitmapSource;
class MaskedFilter;

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

>   struct Pixel32bpp

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/7/96
    Purpose:    This structure defines the layout of a 32bpp RGB pixel value, in a nice kernel
                compatible way. They should be used for kernel access to bitmaps so that
                pixels are treated in a platform independent manner.

                The definitions of these pixels are such that a scanline of pixels is a
                packed array of bytes like this:
                    Red0 Green0 Blue0 Alpha0 Red1 Green1 Blue1 Alpha1 Red2 Green2 Blue2 Alpha2...

                When not using the Alpha channel, set its value to 0.

    SeeAlso:    OILBtmap::GetScanline32; OILBtmap::PlotPixel; OILBtmap::ReadPixel

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

typedef struct
{
    BYTE Red;
    BYTE Green;
    BYTE Blue;
    BYTE Alpha;
} Pixel32bpp;



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

>   PixelGreyscale

    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/7/96
    Purpose:    This value (a BYTE) represents an 8bpp greyscale pixel value

    SeeAlso:    OILBtmap::PlotPixel; OILBtmap::ReadPixel

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

typedef BYTE PixelGreyscale;



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

>   class OriginalBitmapRef : public CCObject

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    8/8/96
    Purpose:    A reference to the original bitmap, before it was decompressed.

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

class OriginalBitmapRef : public CCObject
{
    CC_DECLARE_DYNAMIC( OriginalBitmapRef )

public:
    OriginalBitmapRef(BitmapSource* pSource = NULL, BaseBitmapFilter* pImportFilter = NULL);
    ~OriginalBitmapRef();

    void SetOriginalSource(BitmapSource* pSource = NULL, BaseBitmapFilter* pImportFilter = NULL);
    BOOL GetOriginalSource(BitmapSource** ppSource = NULL, BaseBitmapFilter** ppImportFilter = NULL);

protected:
    BitmapSource*       m_pBitmapSource;
    BaseBitmapFilter*   m_pBitmapFilter;
};


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

>   class OILBitmap : public ListItem

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    11/8/94
    Purpose:    To encapsulate the OILy end of bitmaps. Each OIL layer inherits from this
                and puts real functionality into the class. Things defined in this class
                must remain kernel-ly.

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

class OILBitmap : public ListItem
{
    CC_DECLARE_DYNAMIC( OILBitmap )

    // These are the only classes allowed to create and delete bitmaps
    friend class KernelBitmap;
    friend class GlobalBitmapList;
//  friend class GreyscaleBitmapList;
    friend class OpDeleteBitmap;
    friend class CachedFractal;
    friend class NodeCacheCompound;
    friend class FeatherAttrValue;
    friend class MaskedFilter;
    friend class FlashRenderRegion;
    friend class CBitmapCache;

protected:
    // these are protected because hardly anyone is allowed to create these directly
    OILBitmap();
    virtual ~OILBitmap();

    // makes a bitmap of the correct type for the platform
    static OILBitmap* Create(UINT32 Width, UINT32 Height, UINT32 Depth, UINT32 dpi);

    // Remove the bitmap from the global list
    BOOL RemoveFromGlobalList();

public:
    // static member variables
    static OILBitmap* Default;
    static INT32 s_lMaxGreyscaleSize;

    // public static fns
    static OILBitmap* Create();
    static OILBitmap* Attach( OILBitmap* = Default ,BOOL Temp = FALSE );
    static BOOL Init();
    static void Deinit();

    // public member variables
    virtual INT32 operator==(const OILBitmap&) = 0;
    virtual BOOL GetInfo(BitmapInfo* Info, RenderRegion* pRegion = NULL) = 0;

    virtual UINT32 GetWidth() = 0;
    virtual UINT32 GetHeight() = 0;
    virtual UINT32 GetBPP(RenderRegion* pRegion = NULL) = 0;
    virtual UINT32 GetNumPaletteEntries() = 0;
    virtual ADDR GetBitmapBits() = 0;

    virtual UINT32 GetScanlineSize() = 0;
    UINT32 GetBitmapSize();

    void SetName(String_256& NewName)       { m_BitmapName = NewName; }
    String_256& GetName()                   { return m_BitmapName; }

    void SetBitmapAnimDelay (UINT32 Delay)  { m_BitmapAnimDelay = Delay; }
    UINT32 GetBitmapAnimDelay ()                { return m_BitmapAnimDelay; }

    void SetInterpolation(BOOL Value)       { m_bInterpolation = Value; }
    BOOL GetInterpolation()                 { return m_bInterpolation ; }

    void SetHidden(BOOL Value)              { m_bHidden = Value; }
    BOOL IsHidden() const                   { return m_bHidden ; }
    BOOL IsHiddenInGallery();

    void SetAnimationRestoreType(GIFDisposalMethod Type)    { m_AnimationRestoreType = Type; }
    GIFDisposalMethod GetAnimationRestoreType ()            { return m_AnimationRestoreType; }  
    void SetLeftOffset(UINT32 LeftOffset)   { m_LeftOffset = LeftOffset; }
    UINT32 GetLeftOffset()              { return m_LeftOffset; }
    void SetTopOffset(UINT32 TopOffset) { m_TopOffset = TopOffset; }
    UINT32 GetTopOffset()                   { return m_TopOffset; }

    BOOL InvalidateAllReferences(Document*);
    BOOL IsUsedInDocument(Document* pDoc, BOOL bIncludeHidden = FALSE);
    BOOL IsUsedByChildren(Node* pNode, BOOL bIncludeHidden = FALSE);
    BOOL IsUsedByNode(Node* pNode);

    // for loading/saving bitmaps to EPS RenderRegions
    virtual BOOL ExportBitmap(RenderRegion *pRegion) = 0;
    virtual BOOL ExportBitmapPalette(RenderRegion *pRegion) = 0;
    virtual BOOL ExportBitmapData(RenderRegion *pRegion) = 0;

    virtual INT32 GetRecommendedWidth() = 0;
    virtual INT32 GetRecommendedHeight() = 0;
    virtual void SetRecommendedWidth(INT32) = 0;
    virtual void SetRecommendedHeight(INT32) = 0;

    virtual BOOL SetTransparencyIndex(INT32) = 0;
    virtual BOOL GetTransparencyIndex(INT32*) = 0;
    virtual BOOL IsTransparent() = 0;

    // For exporting bitmaps to postscript with colour-separation
    virtual BOOL ExportSeparatedData(RenderRegion *pRegion, BYTE *SepTables) = 0;
    virtual BOOL ExportSeparatedPalette(RenderRegion *pRegion) = 0;

    // Helper function used by ExportSeparatedData - this retrieves one scanline of the
    // bitmap as generic 32bpp RGB data.
    virtual BOOL GetScanline32bpp(UINT32 YPos, BOOL UsePalette, Pixel32bpp *Scanline) = 0;

    // Function used when exporting an 8bpp JPEG into the web file
    virtual BOOL WritePalette(BaseCamelotFilter *pFilter) = 0;
    // Function used when importing that 24bpp JPEG back in and wanting it in 8bpp format
    virtual BOOL Convert24To8(RGBTRIPLE *pPalette, UINT32 NumberOfPaletteEntries) = 0;

    // Function used by the native/web filters to pull a bitmap from inside a bitmap
    // definition record
    virtual BOOL ImportBitmap(CCLexFile* pFile, BaseBitmapFilter* pBitmapFilter,
                              BaseCamelotFilter* pFilter, BOOL IsCompressed) = 0;

    // Function used by the EPS filters to import bitmaps and by the bitmap filter
    // to import a bitmap directly from a bitmap file
    virtual BOOL ImportBitmap(Filter*, const BitmapInfo*, INT32) = 0;

    virtual BOOL LoadBitmap(UINT32 BitmapResourceID) = 0;

    virtual BOOL GetPaletteUsage(INT32 *) = 0;
    virtual BOOL PrepareMask(INT32 PaletteEntry) = 0;
    virtual BOOL GetScanlineMaskBits(INT32 ScanlineY, LPBYTE ScanlineBuf) = 0;
    virtual BOOL DestroyMask() = 0;

    virtual BOOL BuildContonePalette(DocColour &Start, DocColour &End, EFFECTTYPE Effect, View *ScopeView);
    virtual BOOL ExportContonePalette(RenderRegion *) = 0;
    virtual DocColour GetContonePaletteEntry(UINT32 PaletteIndex);
    virtual BOOL DestroyContonePalette();

    virtual void PlotPixel(INT32 x, INT32 y, Pixel32bpp NewValue) = 0;
    virtual void PlotPixel(INT32 x, INT32 y, PixelGreyscale NewValue) = 0;
    virtual Pixel32bpp ReadPixel32bpp (INT32 x, INT32 y, BOOL UsePalette = TRUE) = 0;
    virtual INT32 ReturnPaletteIndexUsed( INT32 x, INT32 y ) = 0;
    virtual PixelGreyscale ReadPixelGreyscale (INT32 x, INT32 y) = 0;

    // New function to free the actual bitmap memory
    virtual void DeleteData(BOOL bResetToDefault = TRUE) = 0;
    virtual BOOL HasBeenDeleted() = 0;

    // Functions to access the orginal bitmap file
    virtual void SetOriginalSource(BitmapSource* pSource = NULL, BaseBitmapFilter* pImportFilter = NULL);
    virtual BOOL GetOriginalSource(BitmapSource** ppSource = NULL, BaseBitmapFilter** ppImportFilter = NULL);

    // Functions for contoning
    virtual BOOL SetGreyscaleVersion(OILBitmap*);
    virtual BOOL DestroyGreyscaleVersion();
    virtual OILBitmap* GetGreyscaleVersion() { return m_pGreyscaleVersion; }

    virtual void GenerateGreyscaleTable() = 0;
    BYTE* GetGreyscaleTable() { return m_pGreyscaleTable; }

    BOOL IsGreyscale() { return m_bIsGreyscale; }
    BOOL IsDefaultBitmap() { return this == OILBitmap::Default || HasBeenDeleted(); }
    BOOL IsTemp() { return m_bTemp; }       
    BOOL IsInGlobalList() { return !m_bTemp; }
    BOOL IsLossy() { return m_bIsLossy; }

    void SetAsFractal() { m_bIsAFractal = TRUE;
                          m_bIsGreyscale = TRUE; }

    void SetAsGreyscale() { m_bIsGreyscale = TRUE; };
        // Informs this object that the bitmap it contains *is* a greyscale 8bpp bitmap, and that
        // it therefore doesn't need to make a copy in GetGreyscaleVersion()

    void SetAsLossy(BOOL bLossy = TRUE) { m_bIsLossy = bLossy; };
    BOOL IsAFractal() { return m_bIsAFractal; }

    virtual BOOL IsBrowserPalette() = 0;
    virtual BOOL ArePalettesTheSame(const LPLOGPALETTE pLogPalette, const INT32 TransColour = -1) = 0;

    virtual UINT32 GetHorizontalDPI() = 0;
    virtual UINT32 GetVerticalDPI() = 0;

    virtual LPBITMAPINFO        GetBitmapInfo()         = 0;
    virtual LPRGBQUAD           GetPaletteForBitmap()   = 0;
    virtual LPBITMAPINFOHEADER  GetBitmapInfoHeader()   = 0;
    virtual void                ReplaceBitmap(LPBYTE pBytes, LPBITMAPINFO pInfo) = 0;

    virtual OILBitmap* MakeCopy() = 0;

    void SetUsedByBrush(BOOL Used) { m_bUsedByBrush = Used;}
    BOOL IsUsedByBrush() { return m_bUsedByBrush; }

PORTNOTE("other","Removed XML stuff")
#ifndef EXCLUDE_FROM_XARALX
    virtual void        SetXPEInfo(OILBitmap* pMasterBitmap, IXMLDOMDocumentPtr pNewEditList);
    virtual void        GetXPEInfo(OILBitmap*& refMasterBitmap,
                                   IXMLDOMDocumentPtr& refEditList,
                                   BOOL bEnsureList = FALSE);
#endif
    virtual BOOL        IsXPEMaster();
    virtual BOOL        DestroyXPEInfo();
    virtual BOOL        RemoveXPEBitmap();
    virtual BOOL        RebuildXPEBitmap();
    virtual BOOL        NeedsXPERebuild();

    virtual void CopyFullyTransparentFrom(OILBitmap* pBitmap) = 0;

protected:
    String_256 m_BitmapName;
    UINT32 m_BitmapAnimDelay;
    BOOL m_bInterpolation;          // 'smooth when scaled up' property
    GIFDisposalMethod   m_AnimationRestoreType;
    UINT32 m_LeftOffset;
    UINT32 m_TopOffset;

    // Link to the original version of the bitmap
    OriginalBitmapRef m_OriginalBitmap;

    // Contoning stuff
    OILBitmap*  m_pColourVersion;
    OILBitmap*  m_pGreyscaleVersion;
    RGBQUAD*    m_pContonePalette;
    BYTE*       m_pGreyscaleTable;

    // XPE stuff
    OILBitmap* m_pMasterBitmap;
PORTNOTE("other","Removed XML stuff")
#ifndef EXCLUDE_FROM_XARALX
    IXMLDOMDocumentPtr m_pEditList;
#endif
    // Flags
    BOOL m_bTemp : 1;               // This is a temp bitmap (ie. It's not in the global bitmap list)
    BOOL m_bIsAFractal : 1;
    BOOL m_bIsGreyscale : 1;
    BOOL m_bUsedByBrush : 1;
    BOOL m_bNeedsXPERebuild : 1;    // Bitmap data has been removed from memory, can be rebuilt from m_pMasterBitmap and m_pEditList
    BOOL m_bHidden : 1;             // Should not show up in bitmap gallery
    BOOL m_bIsLossy : 1;

#ifdef _DEBUG
    // Debug flag, so we can detect multiple references to temp bitmaps
    BOOL m_bIsAttached : 1;
#endif
};


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

>   class KernelBmpListItem : public ListItem

    Author:     Gerry_Iles (Xara Group Ltd) <camelotdev@xara.com>
    Created:    19/09/05
    Purpose:    Holds a pointer to a KernelBitmap for tracking the creation of
                bitmaps for cleanup purposes.  This class should be eliminated 
                by modifying the bitmap classes to correctly reference count and 
                handle the concept of temporary bitmaps.

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

class KernelBmpListItem : public ListItem
{
public:
    CC_DECLARE_DYNAMIC( KernelBmpListItem )
    KernelBmpListItem(KernelBitmap* pBmp = NULL)
    {
        m_pBmp = pBmp;
    }
    
    KernelBitmap* m_pBmp;           // pointer to bitmap
};

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

>   class KernelBitmap : public ListItem

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    11/8/94
    Purpose:    To encapsulate bitmaps, which are implemented in the OIL layer. Kernel code
                is only allowed to use this interface. OIL code is allowed to use the
                specific OILy functions that can be done via the OILBitmap pointer.

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


class KernelBitmap : public ListItem
{
    friend class BitmapList;

    CC_DECLARE_DYNAMIC( KernelBitmap )

public:
    KernelBitmap( OILBitmap *pBitmap = NULL, BOOL Temp = FALSE );
    KernelBitmap( const KernelBitmap& );
    KernelBitmap( UINT32, UINT32, UINT32, UINT32, BOOL Temp = FALSE );
    ~KernelBitmap();

    static KernelBitmap* MakeKernelBitmap(OILBitmap *pBitmap = NULL,
                                          Document *pDoc = NULL,
                                          BOOL bAlwaysNew = FALSE);

    static void SetCreateTracker(List* pList)
    {
        s_pTrackerList = pList;
    }
    static List* s_pTrackerList;

    INT32 operator==(const KernelBitmap&);
    KernelBitmap& operator=(const KernelBitmap&);

    inline OILBitmap* GetActualBitmap() const { return ActualBitmap; }

    BOOL IsOK() const;

    // Function used when exporting an 8bpp JPEG into the web file
    virtual BOOL WritePalette(BaseCamelotFilter *pFilter);
    // Function used when importing that 24bpp JPEG back in and wanting it in 8bpp format
    virtual BOOL Convert24To8(RGBTRIPLE *pPalette, UINT32 NumberOfPaletteEntries);

    // Function used by the native/web filters to pull a bitmap from inside a bitmap
    // definition record
    static BOOL ImportBitmap(CCLexFile* pFile, BaseBitmapFilter *pBitmapFilter, BaseCamelotFilter *pFilter,
                             BOOL IsCompressed,
                             RGBTRIPLE *pPalette, UINT32 NumberOfPaletteEntries,
                             KernelBitmap** ppImportedBitmap, BOOL* IsNew);
    // Function used by the EPS filters to import bitmaps and by the bitmap filter
    // to import a bitmap directly from a bitmap file
    static BOOL ImportBitmap(Filter *pFilter, const BitmapInfo *pInfo, INT32 BitmapType,
                             KernelBitmap**, BOOL*);

    static KernelBitmap* TryAndUseExistingBitmap(OILBitmap* pOILBitmap, Document* pDoc, 
                                                 BOOL* IsNew);

    inline void PlotPixel(INT32 x, INT32 y, Pixel32bpp NewValue);
    inline void PlotPixel(INT32 x, INT32 y, PixelGreyscale NewValue);
    inline Pixel32bpp ReadPixel32bpp(INT32 x, INT32 y, BOOL UsePalette = TRUE) const;
    inline INT32 ReturnPaletteIndexUsed( INT32 x, INT32 y ) const;
    inline PixelGreyscale ReadPixelGreyscale(INT32 x, INT32 y) const;
    ADDR GetBitmapBits() const;

    BitmapList* GetParentBitmapList() { return m_pParentList; }
    BOOL IsUsedInDocument(Document* pDoc, BOOL bIncludeHidden = FALSE);

    void Attach(BitmapList* = NULL);
    void Detach();

    UINT32 GetWidth() const;
    UINT32 GetHeight() const;
    UINT32 GetBPP();
    UINT32 GetNumPaletteEntries() const;

    INT32 GetRecommendedWidth();
    INT32 GetRecommendedHeight();
    void SetRecommendedWidth(INT32);
    void SetRecommendedHeight(INT32);

    BOOL SetTransparencyIndex(INT32);
    BOOL GetTransparencyIndex(INT32* pIndex);
    BOOL IsTransparent();

    BOOL IsDefaultBitmap();
    BOOL HasBeenDeleted();
    BOOL IsGreyscale();
    BOOL IsLossy();

    // Functions to access the orginal bitmap file
    void SetOriginalSource(BitmapSource* pFileBuffer = NULL, BaseBitmapFilter* pImportFilter = NULL);
    BOOL GetOriginalSource(BitmapSource** ppFileBuffer = NULL, BaseBitmapFilter** ppImportFilter = NULL);

    // Functions for contoning
    BOOL CreateGreyscaleVersion(BOOL ForceGreyBmp = FALSE);
    BOOL DestroyGreyscaleVersion();
    OILBitmap* GetGreyscaleVersion(BOOL ForceGreyBmp = FALSE);

    OILBitmap* ExtractOILBitmap();
    void GenerateGreyscaleTable();

    BOOL SetAsFractal();
    BOOL SetAsGreyscale();
    BOOL SetAsLossy(BOOL bLossy = TRUE);

    UINT32 GetDelay();
    void SetDelay(UINT32 Delay);

    BOOL GetInterpolation();
    void SetInterpolation(BOOL bInterpolation);

    void SetAnimationRestoreType(GIFDisposalMethod Type);
    GIFDisposalMethod GetAnimationRestoreType() const;

    void SetLeftOffset(UINT32 LeftOffset);
    UINT32 GetLeftOffset() const;
    void SetTopOffset(UINT32 TopOffset);
    UINT32 GetTopOffset() const;

    BOOL IsBrowserPalette() const;
    BOOL ArePalettesTheSame(const LPLOGPALETTE pLogPalette, const INT32 TransColour = -1);

    UINT32 GetHorizontalDPI() const;
    UINT32 GetVerticalDPI() const;

    void SetName(String_256& NewName);
    String_256& GetName();

    // These should only really be used by Winoil code
    LPBITMAPINFO        GetBitmapInfo();
    LPRGBQUAD           GetPaletteForBitmap();
    LPBITMAPINFOHEADER  GetBitmapInfoHeader();

    void SetUsedByBrush(BOOL Used) { m_bUsedByBrush = Used;}
    BOOL IsUsedByBrush() { return m_bUsedByBrush;}

PORTNOTE("other","Removed XML stuff")
#ifndef EXCLUDE_FROM_XARALX
    virtual void        SetXPEInfo(KernelBitmap* pMasterBitmap, IXMLDOMDocumentPtr pNewEditList);
    virtual void        GetXPEInfo(KernelBitmap*& refMasterBitmap,
                                   IXMLDOMDocumentPtr& refEditList,
                                   BOOL bEnsureList = FALSE);
#endif
    virtual BOOL        IsXPEMaster();
    virtual BOOL        DestroyXPEInfo();
    virtual void        ReplaceOILBitmap(LPBYTE pBits, LPBITMAPINFO pInfo);

    // attach a copy of this bitmap to the current doc's bitmap gallery.
    // see method definition for more info.
#ifdef _DEBUG
public:
    BOOL AttachDebugCopyToCurrentDocument(String_256 strName);
#endif

public:
    OILBitmap *ActualBitmap;

protected:
    BitmapList* m_pParentList;

    BOOL m_bDontDeleteActualBitmap : 1;
    BOOL m_bFractalAttached : 1;
    BOOL m_bUsedByBrush : 1;

};

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

>   class KernelBitmapRef : public CCObject

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/12/94
    Purpose:    A reference to a KernelBitmap object.

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

class KernelBitmapRef : public CCObject
{
    CC_DECLARE_DYNAMIC( KernelBitmapRef )

public:
    KernelBitmapRef();
    ~KernelBitmapRef();

    INT32 operator==(const KernelBitmapRef&);
    KernelBitmapRef& operator=(KernelBitmapRef&);

    void Attach(KernelBitmap*, Document* Doc = NULL);
    void Detach(BOOL bTryRemoveFromDoc = FALSE);
    void DeleteBmp();

    void RemoveFromTree();
    void AddtoTree();
    BOOL IsHidden() { return m_bHidden; }

    KernelBitmap* GetBitmap() { return m_pTheBitmap; }
    void SetBitmap(KernelBitmap*);

protected:
    KernelBitmap* m_pTheBitmap;

    BOOL m_bHidden;     // Is this ref in a hidden sub-tree
};


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

>   class BitmapPtr : public ListItem

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    12/12/94
    Purpose:    A simple class containing a pointer to a kernel bitmap, so we can build
                lists with them.

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

class BitmapPtr : public ListItem
{
    CC_DECLARE_DYNAMIC( BitmapPtr )

public:
    KernelBitmap* m_TheBitmap;
};

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

>   inline void KernelBitmap::PlotPixel(INT32 x, INT32 y, Pixel32bpp NewValue)
                    
    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com> (Jason)
    Created:    13/9/94 (3/7/96)
    Inputs:     x, y - coordinates within the bitmap of the pixel to plot
                NewValue - a 32bpp pixel value.

    Outputs:    (changes attached oil bitmap)
    Returns:    Nothing
    Purpose:    Plots a 32bpp pixel to a deep bitmap (16, 24, or 32bpp)

    Notes:      In debug builds, will check all kinds of stuff, but in release
                builds, it assumes that you are providing legal offsets in the bitmap,
                and are only using this call where it will work - this is to reduce
                retail overhead on each pixel operation.
        
    Errors:     ERROR3 if the bitmap is not 16, 24, or 32bpp

    SeeAlso:    OILBitmap::PlotPixel

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

inline void KernelBitmap::PlotPixel(INT32 x, INT32 y, Pixel32bpp NewValue)
{
    ERROR3IF(ActualBitmap == NULL, "PlotPixel with no bitmap!");
    ActualBitmap->PlotPixel(x, y, NewValue);
}



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

>   inline void KernelBitmap::PlotPixel(INT32 x, INT32 y, PixelGreyscale NewValue)
                    
    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/7/96
    Inputs:     x, y - coordinates within the bitmap of the pixel to plot
                NewValue - an 8bpp pixel value, presumed to be a greyscale.

    Outputs:    (changes attached oil bitmap)
    Returns:    Nothing

    Purpose:    Plots an 8bpp (0..255) pixel to any type of bitmap
                The pixel is taken to be a greyscale, and is truncated or expanded
                as appropriate to fit the greyscale value into the destination bitmap
                pixel format.

    Notes:      In debug builds, will check all kinds of stuff, but in release
                builds, it assumes that you are providing legal offsets in the bitmap,
                and are only using this call where it will work - this is to reduce
                retail overhead on each pixel operation.

    SeeAlso:    OILBitmap::PlotPixel

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

inline void KernelBitmap::PlotPixel(INT32 x, INT32 y, PixelGreyscale NewValue)
{
    ERROR3IF(ActualBitmap == NULL, "PlotPixel with no bitmap!");
    ActualBitmap->PlotPixel(x, y, NewValue);
}



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

>   inline Pixel32bpp KernelBitmap::ReadPixel32bpp(INT32 x, INT32 y, BOOL UsePalette = TRUE) const
                    
    Author:     Alex_Bligh (Xara Group Ltd) <camelotdev@xara.com> (Jason)
    Created:    13/9/94 (3/7/96)
    Inputs:     x, y - coordinates of the pixel to read
                UsePalette -Ignored for deep bitmaps
                            For <=8bpp bitmaps, if this value is:
                                FALSE, the bitmap's palette will be ignored, and the actual pixel
                                (palette index) value will be returned as a greyscale RGB value
                                TRUE, the pixel index value will be used to retrieve the 24bpp
                                palette entry for the pixel, if a palette is available.

    Outputs:    (changes attached oil bitmap)
    Returns:    The pixel value of the given pixel

    Purpose:    reads a pixel

    Notes:      In debug builds, will check all kinds of stuff, but in release
                builds, it assumes that you are providing legal offsets in the bitmap,
                and are only using this call where it will work - this is to reduce
                retail overhead on each pixel operation.

    Errors:     -
    SeeAlso:    OILBitmap::ReadPixel32bpp

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

inline Pixel32bpp KernelBitmap::ReadPixel32bpp(INT32 x, INT32 y, BOOL UsePalette) const
{
    ERROR3IF(ActualBitmap == NULL, "PlotPixel with no bitmap!");
    return(ActualBitmap->ReadPixel32bpp(x, y));
}


// ap 29/9/99
inline INT32 KernelBitmap::ReturnPaletteIndexUsed( INT32 x, INT32 y ) const
{
    ERROR3IF(ActualBitmap == NULL, "Can't do anything without a bitmap");
    return(ActualBitmap->ReturnPaletteIndexUsed(x, y));
}



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

>   inline PixelGreyscale KernelBitmap::ReadPixelGreyscale(INT32 x, INT32 y) const
                    
    Author:     Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>
    Created:    3/7/96
    Inputs:     x, y - coordinates of the pixel to read
    Outputs:    (changes attached oil bitmap)
    Returns:    The pixel value of the given pixel

    Purpose:    Reads a pixel as a greyscale intensity value (0..255)

    Notes:      When reading a pixel from <8bpp bitmaps, the pixel value will be assumed
                to be a greyscale, and will be expanded up to 8bpp.
                When reading a pixel from a deep bitmap, the RGB value will be converted
                into a greyscale intensity value.

                In debug builds, will check all kinds of stuff, but in release
                builds, it assumes that you are providing legal offsets in the bitmap,
                and are only using this call where it will work - this is to reduce
                retail overhead on each pixel operation.

    Errors:     -
    SeeAlso:    OILBitmap::ReadPixelGreyscale

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

inline PixelGreyscale KernelBitmap::ReadPixelGreyscale(INT32 x, INT32 y) const
{
    ERROR3IF(ActualBitmap == NULL, "PlotPixel with no bitmap!");
    return(ActualBitmap->ReadPixelGreyscale(x, y));
}


#endif

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