ppmfiltr.h

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// $Id: ppmfiltr.h 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
       Copyright on certain contributions may be held in joint with their
              respective authors. See AUTHORS file for details.

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

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under the terms of the GNU General Public License version 2 as published
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Franklin St, Fifth Floor, Boston, MA  02110-1301 USA


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-----------------

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License described above, Xara Group Ltd grants to you certain additional
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The additional rights are to use, modify, and distribute the software
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=================================XARAHEADEREND============================
 */
//

#ifndef INC_PPMFILTR
#define INC_PPMFILTR

#include "bitfilt.h"
//#include "outptdib.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "bmpprefs.h"   // SelectionType
#include "maskedrr.h"   // MaskedRenderRegion derived off GRenderBitmap
//#include "oilfltrs.h" - in camtypes.h [AUTOMATICALLY REMOVED]

class KernelBitmap;
//class OILFilter;

enum PMFileType
{
    PPM_BAD,
    PPM_BINARY,
    PPM_ASCII,  
    PGM_BINARY,
    PGM_ASCII,  
    PBM_BINARY,
    PBM_ASCII,  
};  

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

>   class BasePMFilter : public BitmapFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    30/11/95
    Purpose:    Provides most of the the handling for the PPM, PGM and PBM filters.

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

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

    BOOL Init();

    virtual INT32 HowCompatible( PathName& Filename, ADDR HeaderStart, UINT32 HeaderSize,
                               UINT32 FileSize );
    // Import related functions
    virtual BOOL ReadFromFile(OILBitmap* pOilBitmap);

protected:
    //
    // Import related functions
    //
    //virtual BOOL PrepareToImport();
    //virtual void CleanUpAfterImport();

    BOOL ReadFromFile( CCLexFile *File, LPBITMAPINFO *Info, LPBYTE *Bits, String_64 *ProgressString = NULL);

    BOOL ReadASCIIFromFile( CCLexFile *pLexFile, LPBYTE pBits,
                            INT32   Width, INT32 Height, INT32 ColoursPerRGB, INT32 BitsPerRGB,
                            INT32 WidthOfLine,
                            String_64 *ProgressString = NULL, BOOL Forwards = TRUE);
    BOOL ReadBinaryFromFile( CCLexFile *pFile, LPBYTE pBits,
                             INT32 Width, INT32 Height, INT32 ColoursPerRGB, INT32 BitsPerRGB,
                             INT32 WidthOfLine,
                             String_64 *ProgressString = NULL, BOOL Forwards = TRUE);

    // Useful palette functions
    void PokePaletteEntry(LPRGBQUAD * Palette, BYTE red, BYTE green, BYTE blue);
    void MakeGreyScalePalette(LPRGBQUAD Palette);
    void Make16GreyScalePalette(LPRGBQUAD Palette);
    void MakeBlackAndWhitePalette(LPRGBQUAD Palette);

    // Functions that a filter derived off this must provide
    virtual BOOL CheckString(TCHAR * pHeader);
    virtual BOOL ReadDataIntoBitmap(INT32 Number, INT32 * Count, LPBYTE * pData, BOOL * NextPixel);

    // What the file type we are reading is
    PMFileType TypeOfPPM;

    // This is so we can remember what we thought of the GIF file.
    INT32 PPMHowCompatible; 

    INT32 x;                    // current x position across bitmap
    INT32 y;                    // current y position down bitmap
    INT32 TotalWidth;           // width in pixels of bitmap
    INT32 TotalHeight;      // height in pixels of bitmap
    INT32 TotalWidthOfLine; // width of lien rounded to required word boundaries
    INT32 RGBColours;           // number of colours per colour component
    INT32 RGBBits;          // bits per colour component e.g. R, G and B
    INT32 PixelCounter;     // how many pixels we get per read

    INT32 Red;              // red component for 24bit files
    INT32 Green;                // green component for 24bit files
    INT32 Blue;             // blue component for 24bit files

    BYTE Bits;              // accumulator for bits in 1bpp files

public:
    // Check if this Bitmap filter can cope with saving at this Bpp/Colour depth
    virtual BOOL IsThisBppOk(UINT32 Bpp);
};

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

>   class PPMFilter : public BitmapFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    30/11/95
    Purpose:    Encapsulates a Unix PPM import filter.

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

class PPMFilter : public BasePMFilter
{
    CC_DECLARE_DYNAMIC(PPMFilter);
    
public:
    PPMFilter();

    BOOL Init();

protected:
    virtual BOOL CheckString(TCHAR * pHeader);
    virtual BOOL ReadDataIntoBitmap(INT32 Number, INT32 * Count, LPBYTE * pData, BOOL * NextPixel);
};

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

>   class PPMFilter : public BitmapFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    30/11/95
    Purpose:    Encapsulates a Unix PGM import filter.

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

class PGMFilter : public BasePMFilter
{
    CC_DECLARE_DYNAMIC(PGMFilter);
    
public:
    PGMFilter();

    BOOL Init();

protected:
    virtual BOOL CheckString(TCHAR * pHeader);
    virtual BOOL ReadDataIntoBitmap(INT32 Number, INT32 * Count, LPBYTE * pData, BOOL * NextPixel);
};

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

>   class PBMFilter : public BitmapFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    30/11/95
    Purpose:    Encapsulates a Unix PBM import filter.

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

class PBMFilter : public BasePMFilter
{
    CC_DECLARE_DYNAMIC(PBMFilter);
    
public:
    PBMFilter();

    BOOL Init();

protected:
    virtual BOOL CheckString(TCHAR * pHeader);
    virtual BOOL ReadDataIntoBitmap(INT32 Number, INT32 * Count, LPBYTE * pData, BOOL * NextPixel);
};


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

>   class PPMOILFilter : public OILFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/11/95
    Purpose:    Provide the OIL parts of the PPM filter which loads in the file as a BMP.
    SeeAlso:    PPMFilter

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

class PPMOILFilter : public OILFilter
{
public:
    PPMOILFilter(Filter *pFilter);
};

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

>   class PGMOILFilter : public OILFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/11/95
    Purpose:    Provide the OIL parts of the PGM filter which loads in the file as a BMP.
    SeeAlso:    PGMFilter

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

class PGMOILFilter : public OILFilter
{
public:
    PGMOILFilter(Filter *pFilter);
};

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

>   class PBMOILFilter : public OILFilter

    Author:     Neville_Humphrys (Xara Group Ltd) <camelotdev@xara.com>
    Created:    28/11/95
    Purpose:    Provide the OIL parts of the PBM filter which loads in the file as a BMP.
    SeeAlso:    PBMFilter

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

class PBMOILFilter : public OILFilter
{
public:
    PBMOILFilter(Filter *pFilter);
};



#endif // INC_PPMFILTR

---