wxWidgets/include/wx/imagbmp.h

/////////////////////////////////////////////////////////////////////////////
// Name:        imagbmp.h
// Purpose:     wxImage BMP handler
// Author:      Robert Roebling
// RCS-ID:      $Id$
// Copyright:   (c) Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_IMAGBMP_H_
#define _WX_IMAGBMP_H_

#ifdef __GNUG__
#pragma interface "imagbmp.h"
#endif

#include "wx/image.h"

// defines for saving the BMP file in different formats, Bits Per Pixel
// USE: wximage.SetOption( wxBMP_FORMAT, wxBMP_xBPP );
#define wxBMP_FORMAT wxString(_T("wxBMP_FORMAT"))

enum
{
    wxBMP_24BPP        = 24, // default, do not need to set
    //wxBMP_16BPP      = 16, // wxQuantize can only do 236 colors?
    wxBMP_8BPP         =  8, // 8bpp, quantized colors
    wxBMP_8BPP_GREY    =  9, // 8bpp, rgb averaged to greys
    wxBMP_8BPP_GRAY    =  wxBMP_8BPP_GREY,
    wxBMP_8BPP_RED     = 10, // 8bpp, red used as greyscale
    wxBMP_8BPP_PALETTE = 11, // 8bpp, use the wxImage's palette
    wxBMP_4BPP         =  4, // 4bpp, quantized colors
    wxBMP_1BPP         =  1, // 1bpp, quantized "colors"
    wxBMP_1BPP_BW      =  2  // 1bpp, black & white from red
};

// ----------------------------------------------------------------------------
// wxBMPHandler
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxBMPHandler : public wxImageHandler
{
public:
    wxBMPHandler()
    {
        m_name = _T("BMP file");
        m_extension = _T("bmp");
        m_type = wxBITMAP_TYPE_BMP;
        m_mime = _T("image/bmp");
    };

#if wxUSE_STREAMS

  virtual bool SaveFile( wxImage *image, wxOutputStream& stream, bool verbose=TRUE );
  virtual bool LoadFile( wxImage *image, wxInputStream& stream, bool verbose=TRUE, int index=0 );
  virtual bool DoCanRead( wxInputStream& stream );
                                
protected:
  bool DoLoadDib (wxImage * image, int width, int height, int bpp, int ncolors, int comp,
                off_t bmpOffset, wxInputStream& stream,
                bool verbose, bool IsBmp, bool hasPalette  ) ;
  bool LoadDib( wxImage *image, wxInputStream& stream, bool verbose, bool IsBmp  ) ;

#endif // wxUSE_STREAMS

private:
     DECLARE_DYNAMIC_CLASS(wxBMPHandler)
};


// ----------------------------------------------------------------------------
// wxICOHandler
// ----------------------------------------------------------------------------

class WXDLLEXPORT wxICOHandler : public wxBMPHandler
{
public:
    wxICOHandler()
    {
        m_name = _T("ICO file");
        m_extension = _T("ico");
        m_type = wxBITMAP_TYPE_ICO;
        m_mime = _T("image/icon");
    };

#if wxUSE_STREAMS

  virtual bool SaveFile( wxImage *image, wxOutputStream& stream, bool verbose=TRUE );
  virtual bool LoadFile( wxImage *image, wxInputStream& stream, bool verbose=TRUE, int index=0 );
  virtual bool DoCanRead( wxInputStream& stream );
                
#endif // wxUSE_STREAMS

private:
    DECLARE_DYNAMIC_CLASS(wxBMPHandler)
};


#endif
  // _WX_IMAGBMP_H_