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   DECLARE_CLASS(wxImageHandler)
  41
  42 public:
  43   wxImageHandler() { m_name = ""; m_extension = ""; m_type = 0; }
  44
  45 #if wxUSE_STREAMS
  46   virtual bool LoadFile( wxImage *image, wxInputStream& stream, bool verbose=TRUE, int index=0 );
  47   virtual bool SaveFile( wxImage *image, wxOutputStream& stream, bool verbose=TRUE );
  48
  49   virtual int GetImageCount( wxInputStream& stream );
  50
  51   bool CanRead( wxInputStream& stream ) { return DoCanRead(stream); }
  52   bool CanRead( const wxString& name );
  53 #endif // wxUSE_STREAMS
  54
  55   void SetName(const wxString& name) { m_name = name; }
  56   void SetExtension(const wxString& ext) { m_extension = ext; }
  57   void SetType(long type) { m_type = type; }
  58   void SetMimeType(const wxString& type) { m_mime = type; }
  59   wxString GetName() const { return m_name; }
  60   wxString GetExtension() const { return m_extension; }
  61   long GetType() const { return m_type; }
  62   wxString GetMimeType() const { return m_mime; }
  63
  64 protected:
  65 #if wxUSE_STREAMS
  66   virtual bool DoCanRead( wxInputStream& stream ) = 0;
  67 #endif // wxUSE_STREAMS
  68
  69   wxString  m_name;
  70   wxString  m_extension;
  71   wxString  m_mime;
  72   long      m_type;
  73 };
  74
  75
  76 //-----------------------------------------------------------------------------
  77 // wxImage
  78 //-----------------------------------------------------------------------------
  79
  80
  81 // GRG: Dic/99
  82 class WXDLLEXPORT wxHNode
  83 {
  84 public:
  85     unsigned long index;
  86     unsigned long value;
  87 };
  88
  89
  90 class WXDLLEXPORT wxImage: public wxObject
  91 {
  92   DECLARE_DYNAMIC_CLASS(wxImage)
  93
  94   friend class WXDLLEXPORT wxImageHandler;
  95
  96 public:
  97
  98   wxImage();
  99   wxImage( int width, int height );
 100   wxImage( const wxString& name, long type = wxBITMAP_TYPE_ANY );
 101   wxImage( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
 102   wxImage( const wxString& name, const wxString& mimetype );
 103   wxImage( wxInputStream& stream, const wxString& mimetype );
 104
 105   wxImage( const wxImage& image );
 106   wxImage( const wxImage* image );
 107
 108   // these functions get implemented in /src/(platform)/bitmap.cpp
 109   wxImage( const wxBitmap &bitmap );
 110   operator wxBitmap() const { return ConvertToBitmap(); }
 111   wxBitmap ConvertToBitmap() const;
 112
 113   void Create( int width, int height );
 114   void Destroy();
 115
 116   // return the new image with size width*height
 117   wxImage GetSubImage( const wxRect& ) const;
 118
 119   // return the new image with size width*height
 120   wxImage Scale( int width, int height ) const;
 121
 122   // rescales the image in place
 123   wxImage& Rescale( int width, int height ) { return *this = Scale(width, height); }
 124
 125   // these routines are slow but safe
 126   void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
 127   unsigned char GetRed( int x, int y );
 128   unsigned char GetGreen( int x, int y );
 129   unsigned char GetBlue( int x, int y );
 130
 131   static bool CanRead( const wxString& name );
 132   virtual bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_ANY );
 133   virtual bool LoadFile( const wxString& name, const wxString& mimetype );
 134
 135 #if wxUSE_STREAMS
 136   static bool CanRead( wxInputStream& stream );
 137   virtual bool LoadFile( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
 138   virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype );
 139 #endif
 140
 141   virtual bool SaveFile( const wxString& name, int type );
 142   virtual bool SaveFile( const wxString& name, const wxString& mimetype );
 143
 144 #if wxUSE_STREAMS
 145   virtual bool SaveFile( wxOutputStream& stream, int type );
 146   virtual bool SaveFile( wxOutputStream& stream, const wxString& mimetype );
 147 #endif
 148
 149   bool Ok() const;
 150   int GetWidth() const;
 151   int GetHeight() const;
 152
 153   char unsigned *GetData() const;
 154   void SetData( char unsigned *data );
 155
 156   void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
 157   unsigned char GetMaskRed() const;
 158   unsigned char GetMaskGreen() const;
 159   unsigned char GetMaskBlue() const;
 160   void SetMask( bool mask = TRUE );
 161   bool HasMask() const;
 162
 163   wxImage& operator = (const wxImage& image)
 164   {
 165     if ( (*this) != image )
 166       Ref(image);
 167     return *this;
 168   }
 169
 170   bool operator == (const wxImage& image)
 171     { return m_refData == image.m_refData; }
 172   bool operator != (const wxImage& image)
 173     { return m_refData != image.m_refData; }
 174
 175   static wxList& GetHandlers() { return sm_handlers; }
 176   static void AddHandler( wxImageHandler *handler );
 177   static void InsertHandler( wxImageHandler *handler );
 178   static bool RemoveHandler( const wxString& name );
 179   static wxImageHandler *FindHandler( const wxString& name );
 180   static wxImageHandler *FindHandler( const wxString& extension, long imageType );
 181   static wxImageHandler *FindHandler( long imageType );
 182   static wxImageHandler *FindHandlerMime( const wxString& mimetype );
 183
 184   static void CleanUpHandlers();
 185   static void InitStandardHandlers();
 186
 187   // GRG: Dic/99
 188   unsigned long CountColours( unsigned long stopafter = -1 );
 189   unsigned long ComputeHistogram( wxHashTable &h );
 190
 191
 192 protected:
 193
 194   static wxList sm_handlers;
 195
 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