maskfilt.h

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// $Id: maskfilt.h 809 2006-04-13 11:28:42Z phil $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
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              respective authors. See AUTHORS file for details.

LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

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

#ifndef INC_MASKEDFILTER
#define INC_MASKEDFILTER

#include "bitfilt.h"
//#include "bmpprefs.h"     // SelectionType
#include "exphint.h"

class CXaraFileRecord;
class KernelBitmap;
class OutputDIB;

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

>   class MaskedFilterExportOptions : public BitmapExportOptions

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    30/10/96
    Purpose:    Base class for storing information about the bitmap we're exporting.

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

class MaskedFilterExportOptions : public BitmapExportOptions
{
    CC_DECLARE_DYNAMIC(MaskedFilterExportOptions)

public:

    static BOOL Declare();

    MaskedFilterExportOptions();
    MaskedFilterExportOptions(const CDlgResID& Dialog, 
                              const FilterType FilterID, const StringBase* pFilterName);

    virtual BOOL    RetrieveDefaults();
    virtual BOOL    SetAsDefaults() const;

    // Save and load from named export set properties.
    virtual BOOL Write(CXaraFileRecord* pRec);
    virtual BOOL Read(CXaraFileRecord* pRec);

    virtual DITHER  GetDither() const { return m_Dither; }
    virtual BOOL    SetDither(const DITHER& Dither);

    BOOL    WantTransparent() const;
    BOOL    WantInterlaced() const { return m_bInterlaced; }
    BOOL    SetMakeInterlaced(BOOL bInterlaced);

    void    SetFilterType(FilterType ID)    {   m_FilterID = ID;    }

// WEBSTER - markn 21/1/97
    virtual BOOL UseSpecificNumColsInPalette();

    // for object copying and comparing
    virtual BOOL CopyFrom(BitmapExportOptions *pOther);

    //  Same as above, except it is used to copy information when changing file types
    virtual BOOL FileTypeChangeCopyFrom(BitmapExportOptions *pOther);
//  virtual BOOL Equal(BitmapExportOptions *pOther);

    // needed for the make bitmap copy options preview dialog
    BOOL CopyFromMasked(MaskedFilterExportOptions *pOther);

protected:

    // Parameters that the dialog can set
    DITHER  m_Dither;                   // Dither type
    BOOL    m_bInterlaced;

    // Persistant buffer
    static DITHER   g_Dither;
    static PALETTE  g_Palette;
    static BOOL     g_bTransparent;
    static BOOL     g_bInterlaced;

};

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

>   class MaskedFilter : public BitmapFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    26/4/96
    Purpose:    Encapsulates a masked filter which provides funcitonality for doing masked
                bitmap export and import.

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

class MaskedFilter : public BaseBitmapFilter
{
    CC_DECLARE_DYNAMIC(MaskedFilter);
    
public:

    MaskedFilter();
    BOOL Init();

    INT32   SetTransColour(INT32 NewColour);
    INT32   GetTransColour() { return TransColour; }

    // SMFIX - Sets All the appropriate colour to being Transparent!
    BOOL ApplyTransparentColoursToBitmap(KernelBitmap* pExportBitmap = NULL, BitmapExportOptions* pExportOptions = NULL);
    BOOL ApplyTransparentColoursToBitmap(BITMAPINFOHEADER* pInfoHeader = NULL, BYTE* pBMPBits = NULL,
                                         BitmapExportOptions* pExportOptions = NULL, UINT32 YOffset = 0,
                                         UINT32 StripHeight = 0);

    // Virtual overrides
    virtual UINT32 GetNumReservedColours();
    virtual BOOL ExportSelectionOnly(BOOL MaskedRender = FALSE); 

    virtual BOOL CheckSingleBitmapsOnSpread ( Spread    *pSpread,
                                              BOOL      *pSamePalettes,
                                              BOOL      *pOurBrowserPalette,
                                              BOOL      *pAllHaveBitmaps,
                                              BOOL      *pAllWithinCount,
                                              UINT32        *pPaletteEntries = NULL );

protected:

    // Export a bitmap.
    virtual BOOL WriteToFile ( BOOL End );

    // Get a pointer to the OutputDIB.
    virtual OutputDIB* GetOutputDIB(void) { return NULL; }

    // Base Class version - See PNG Filter
    virtual void InvertAlpha(LPBITMAPINFO lpBitmapInfo, LPBYTE lpBits) { return; }

    INT32 FindUnusedColour(LPBITMAPINFO pBMInfo, LPBYTE pBMBits);

    UINT32 Compression;         // Compression to use (JPEG = %, others = TRUE, FALSE)

    BOOL SecondPass;            // flag for whether we are rendering second pass on export
    BOOL DoingMask;             // flag for whether we are rendering the mask or not

    // Storage for the 8bpp mask that is made up in the first pass rendering on export
    LPBITMAPINFO pDestBMInfo;   
    LPBYTE pDestBMBytes;
    BYTE* pTempBitmapMask;              // WhiteArea mask generated during 1st pass render
    UINT32 CurrentScanline;             // Current scanline in the WhiteArea mask.

    INT32 TransColour;                  // -1 == none, or the transparent colour.

    virtual BOOL SetExportHint(Document* pDoc);
    
    // Override this to provide the correct hint type
    virtual UINT32 GetHintType(void) { return(HINTTYPE_BAD); }

    INT32 m_BandNumber; //  Tells you which band of the bitmap we are working on.
    //  Tells you if the user made a selection before opening the export dialog.
    BOOL m_bSelection;  
};

#endif // INC_MASKEDFILTER

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