include/wx/image.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        image.h
   3 // Purpose:     wxImage class
   4 // Author:      Robert Roebling
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifndef _WX_IMAGE_H_
  11 #define _WX_IMAGE_H_
  12
  13 #ifdef __GNUG__
  14 #pragma interface "image.h"
  15 #endif
  16
  17 #include "wx/setup.h"
  18 #include "wx/object.h"
  19 #include "wx/string.h"
  20 #include "wx/gdicmn.h"
  21 #include "wx/bitmap.h"
  22
  23 #if wxUSE_STREAMS
  24 #  include "wx/stream.h"
  25 #endif
  26
  27 //-----------------------------------------------------------------------------
  28 // classes
  29 //-----------------------------------------------------------------------------
  30
  31 class WXDLLEXPORT wxImageHandler;
  32 class WXDLLEXPORT wxImage;
  33
  34 //-----------------------------------------------------------------------------
  35 // wxImageHandler
  36 //-----------------------------------------------------------------------------
  37
  38 class WXDLLEXPORT wxImageHandler: public wxObject
  39 {
  40 public:
  41     wxImageHandler() { m_name = ""; m_extension = ""; m_type = 0; }
  42
  43 #if wxUSE_STREAMS
  44     virtual bool LoadFile( wxImage *image, wxInputStream& stream, bool verbose=TRUE, int index=0 );
  45     virtual bool SaveFile( wxImage *image, wxOutputStream& stream, bool verbose=TRUE );
  46
  47     virtual int GetImageCount( wxInputStream& stream );
  48
  49     bool CanRead( wxInputStream& stream ) { return DoCanRead(stream); }
  50     bool CanRead( const wxString& name );
  51 #endif // wxUSE_STREAMS
  52
  53     void SetName(const wxString& name) { m_name = name; }
  54     void SetExtension(const wxString& ext) { m_extension = ext; }
  55     void SetType(long type) { m_type = type; }
  56     void SetMimeType(const wxString& type) { m_mime = type; }
  57     wxString GetName() const { return m_name; }
  58     wxString GetExtension() const { return m_extension; }
  59     long GetType() const { return m_type; }
  60     wxString GetMimeType() const { return m_mime; }
  61
  62 protected:
  63 #if wxUSE_STREAMS
  64     virtual bool DoCanRead( wxInputStream& stream ) = 0;
  65 #endif // wxUSE_STREAMS
  66
  67     wxString  m_name;
  68     wxString  m_extension;
  69     wxString  m_mime;
  70     long      m_type;
  71
  72 private:
  73     DECLARE_CLASS(wxImageHandler)
  74 };
  75
  76 //-----------------------------------------------------------------------------
  77 // wxImage
  78 //-----------------------------------------------------------------------------
  79
  80 class WXDLLEXPORT wxHNode
  81 {
  82 public:
  83     unsigned long index;
  84     unsigned long value;
  85 };
  86
  87 class WXDLLEXPORT wxImage: public wxObject
  88 {
  89 public:
  90     wxImage();
  91     wxImage( int width, int height );
  92     wxImage( const wxString& name, long type = wxBITMAP_TYPE_ANY );
  93     wxImage( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
  94     wxImage( const wxString& name, const wxString& mimetype );
  95     wxImage( wxInputStream& stream, const wxString& mimetype );
  96
  97     wxImage( const wxImage& image );
  98     wxImage( const wxImage* image );
  99
 100     // these functions get implemented in /src/(platform)/bitmap.cpp
 101     wxImage( const wxBitmap &bitmap );
 102     operator wxBitmap() const { return ConvertToBitmap(); }
 103     wxBitmap ConvertToBitmap() const;
 104 #ifdef __WXGTK__
 105     wxBitmap ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue );
 106 #endif
 107
 108     void Create( int width, int height );
 109     void Destroy();
 110
 111     // return the new image with size width*height
 112     wxImage GetSubImage( const wxRect& ) const;
 113
 114     // return the new image with size width*height
 115     wxImage Scale( int width, int height ) const;
 116
 117     // rescales the image in place
 118     wxImage& Rescale( int width, int height ) { return *this = Scale(width, height); }
 119
 120     // replace one colour with another
 121     void Replace( unsigned char r1, unsigned char g1, unsigned char b1,
 122                   unsigned char r2, unsigned char g2, unsigned char b2 );
 123
 124     // these routines are slow but safe
 125     void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
 126     unsigned char GetRed( int x, int y );
 127     unsigned char GetGreen( int x, int y );
 128     unsigned char GetBlue( int x, int y );
 129
 130     static bool CanRead( const wxString& name );
 131     virtual bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_ANY );
 132     virtual bool LoadFile( const wxString& name, const wxString& mimetype );
 133
 134 #if wxUSE_STREAMS
 135     static bool CanRead( wxInputStream& stream );
 136     virtual bool LoadFile( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
 137     virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype );
 138 #endif
 139
 140     virtual bool SaveFile( const wxString& name, int type );
 141     virtual bool SaveFile( const wxString& name, const wxString& mimetype );
 142
 143 #if wxUSE_STREAMS
 144     virtual bool SaveFile( wxOutputStream& stream, int type );
 145     virtual bool SaveFile( wxOutputStream& stream, const wxString& mimetype );
 146 #endif
 147
 148     bool Ok() const;
 149     int GetWidth() const;
 150     int GetHeight() const;
 151
 152     char unsigned *GetData() const;
 153     void SetData( char unsigned *data );
 154
 155     void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
 156     unsigned char GetMaskRed() const;
 157     unsigned char GetMaskGreen() const;
 158     unsigned char GetMaskBlue() const;
 159     void SetMask( bool mask = TRUE );
 160     bool HasMask() const;
 161
 162     unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 );
 163     unsigned long ComputeHistogram( wxHashTable &h );
 164
 165     wxImage& operator = (const wxImage& image)
 166     {
 167         if ( (*this) != image )
 168             Ref(image);
 169         return *this;
 170     }
 171
 172     bool operator == (const wxImage& image)
 173         { return m_refData == image.m_refData; }
 174     bool operator != (const wxImage& image)
 175         { return m_refData != image.m_refData; }
 176
 177     static wxList& GetHandlers() { return sm_handlers; }
 178     static void AddHandler( wxImageHandler *handler );
 179     static void InsertHandler( wxImageHandler *handler );
 180     static bool RemoveHandler( const wxString& name );
 181     static wxImageHandler *FindHandler( const wxString& name );
 182     static wxImageHandler *FindHandler( const wxString& extension, long imageType );
 183     static wxImageHandler *FindHandler( long imageType );
 184     static wxImageHandler *FindHandlerMime( const wxString& mimetype );
 185
 186     static void CleanUpHandlers();
 187     static void InitStandardHandlers();
 188
 189 protected:
 190     static wxList sm_handlers;
 191
 192 private:
 193     friend class WXDLLEXPORT wxImageHandler;
 194
 195     DECLARE_DYNAMIC_CLASS(wxImage)
 196 };
 197
 198
 199 extern void WXDLLEXPORT wxInitAllImageHandlers();
 200
 201
 202 //-----------------------------------------------------------------------------
 203 // wxImage handlers
 204 //-----------------------------------------------------------------------------
 205
 206 #include "wx/imagbmp.h"
 207 #include "wx/imagpng.h"
 208 #include "wx/imaggif.h"
 209 #include "wx/imagpcx.h"
 210 #include "wx/imagjpeg.h"
 211 #include "wx/imagtiff.h"
 212 #include "wx/imagpnm.h"
 213
 214 #endif
 215   // _WX_IMAGE_H_
 216