include/wx/imagpng.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/imagpng.h
   3 // Purpose:     wxImage PNG handler
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifndef _WX_IMAGPNG_H_
  11 #define _WX_IMAGPNG_H_
  12
  13 #include "wx/defs.h"
  14
  15 //-----------------------------------------------------------------------------
  16 // wxPNGHandler
  17 //-----------------------------------------------------------------------------
  18
  19 #if wxUSE_LIBPNG
  20
  21 #include "wx/image.h"
  22 #include "wx/versioninfo.h"
  23
  24 #define wxIMAGE_OPTION_PNG_FORMAT    wxT("PngFormat")
  25 #define wxIMAGE_OPTION_PNG_BITDEPTH  wxT("PngBitDepth")
  26 #define wxIMAGE_OPTION_PNG_FILTER    wxT("PngF")
  27 #define wxIMAGE_OPTION_PNG_COMPRESSION_LEVEL       wxT("PngZL")
  28 #define wxIMAGE_OPTION_PNG_COMPRESSION_MEM_LEVEL   wxT("PngZM")
  29 #define wxIMAGE_OPTION_PNG_COMPRESSION_STRATEGY    wxT("PngZS")
  30 #define wxIMAGE_OPTION_PNG_COMPRESSION_BUFFER_SIZE wxT("PngZB")
  31
  32 enum
  33 {
  34     wxPNG_TYPE_COLOUR = 0,
  35     wxPNG_TYPE_GREY = 2,
  36     wxPNG_TYPE_GREY_RED = 3,
  37     wxPNG_TYPE_PALETTE = 4
  38 };
  39
  40 class WXDLLIMPEXP_CORE wxPNGHandler: public wxImageHandler
  41 {
  42 public:
  43     inline wxPNGHandler()
  44     {
  45         m_name = wxT("PNG file");
  46         m_extension = wxT("png");
  47         m_type = wxBITMAP_TYPE_PNG;
  48         m_mime = wxT("image/png");
  49     }
  50
  51     static wxVersionInfo GetLibraryVersionInfo();
  52
  53 #if wxUSE_STREAMS
  54     virtual bool LoadFile( wxImage *image, wxInputStream& stream, bool verbose=true, int index=-1 );
  55     virtual bool SaveFile( wxImage *image, wxOutputStream& stream, bool verbose=true );
  56 protected:
  57     virtual bool DoCanRead( wxInputStream& stream );
  58 #endif
  59
  60 private:
  61     DECLARE_DYNAMIC_CLASS(wxPNGHandler)
  62 };
  63
  64 #endif
  65   // wxUSE_LIBPNG
  66
  67 #endif
  68   // _WX_IMAGPNG_H_
  69