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 #if wxUSE_IMAGE
  28
  29 //-----------------------------------------------------------------------------
  30 // classes
  31 //-----------------------------------------------------------------------------
  32
  33 class WXDLLEXPORT wxImageHandler;
  34 class WXDLLEXPORT wxImage;
  35
  36 //-----------------------------------------------------------------------------
  37 // wxImageHandler
  38 //-----------------------------------------------------------------------------
  39
  40 class WXDLLEXPORT wxImageHandler: public wxObject
  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 private:
  75     DECLARE_CLASS(wxImageHandler)
  76 };
  77
  78 //-----------------------------------------------------------------------------
  79 // wxImage
  80 //-----------------------------------------------------------------------------
  81
  82 class WXDLLEXPORT wxHNode
  83 {
  84 public:
  85     unsigned long index;
  86     unsigned long value;
  87 };
  88
  89 class WXDLLEXPORT wxImage: public wxObject
  90 {
  91 public:
  92     wxImage();
  93     wxImage( int width, int height );
  94     wxImage( int width, int height, unsigned char* data, bool static_data = FALSE );
  95     wxImage( const wxString& name, long type = wxBITMAP_TYPE_ANY );
  96     wxImage( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
  97     wxImage( const wxString& name, const wxString& mimetype );
  98     wxImage( wxInputStream& stream, const wxString& mimetype );
  99
 100     wxImage( const wxImage& image );
 101     wxImage( const wxImage* image );
 102
 103 #if wxUSE_GUI
 104     // convertion to/from wxBitmap (deprecated, use wxBitmap's methods instead):
 105     wxImage( const wxBitmap &bitmap );
 106     wxBitmap ConvertToBitmap() const;
 107 #ifdef __WXGTK__
 108     wxBitmap ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue ) const;
 109 #endif
 110 #endif
 111
 112     void Create( int width, int height );
 113     void Create( int width, int height, unsigned char* data, bool static_data = FALSE );
 114     void Destroy();
 115
 116     // creates an identical copy of the image (the = operator
 117     // just raises the ref count)
 118     wxImage Copy() const;
 119
 120     // return the new image with size width*height
 121     wxImage GetSubImage( const wxRect& ) const;
 122
 123     // pastes image into this instance and takes care of
 124     // the mask colour and out of bounds problems
 125     void Paste( const wxImage &image, int x, int y );
 126
 127     // return the new image with size width*height
 128     wxImage Scale( int width, int height ) const;
 129
 130     // rescales the image in place
 131     wxImage& Rescale( int width, int height ) { return *this = Scale(width, height); }
 132
 133     // Rotates the image about the given point, 'angle' radians.
 134     // Returns the rotated image, leaving this image intact.
 135     wxImage Rotate(double angle, const wxPoint & centre_of_rotation,
 136                    bool interpolating = TRUE, wxPoint * offset_after_rotation = (wxPoint*) NULL) const;
 137
 138     wxImage Rotate90( bool clockwise = TRUE ) const;
 139     wxImage Mirror( bool horizontally = TRUE ) const;
 140
 141     // replace one colour with another
 142     void Replace( unsigned char r1, unsigned char g1, unsigned char b1,
 143                   unsigned char r2, unsigned char g2, unsigned char b2 );
 144
 145     // convert to monochrome image (<r,g,b> will be replaced by white, everything else by black)
 146     wxImage ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const;
 147
 148     // these routines are slow but safe
 149     void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
 150     unsigned char GetRed( int x, int y ) const;
 151     unsigned char GetGreen( int x, int y ) const;
 152     unsigned char GetBlue( int x, int y ) const;
 153
 154     // find first colour that is not used in the image and has higher
 155     // RGB values than <startR,startG,startB>
 156     bool FindFirstUnusedColour( unsigned char *r, unsigned char *g, unsigned char *b,
 157                                 unsigned char startR = 1, unsigned char startG = 0,
 158                                 unsigned char startB = 0 );
 159     // Set image's mask to the area of 'mask' that has <r,g,b> colour
 160     bool SetMaskFromImage(const wxImage & mask,
 161                           unsigned char mr, unsigned char mg, unsigned char mb);
 162
 163     static bool CanRead( const wxString& name );
 164     virtual bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_ANY );
 165     virtual bool LoadFile( const wxString& name, const wxString& mimetype );
 166
 167 #if wxUSE_STREAMS
 168     static bool CanRead( wxInputStream& stream );
 169     virtual bool LoadFile( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
 170     virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype );
 171 #endif
 172
 173     virtual bool SaveFile( const wxString& name, int type );
 174     virtual bool SaveFile( const wxString& name, const wxString& mimetype );
 175
 176 #if wxUSE_STREAMS
 177     virtual bool SaveFile( wxOutputStream& stream, int type );
 178     virtual bool SaveFile( wxOutputStream& stream, const wxString& mimetype );
 179 #endif
 180
 181     bool Ok() const;
 182     int GetWidth() const;
 183     int GetHeight() const;
 184
 185     char unsigned *GetData() const;
 186     void SetData( char unsigned *data );
 187     void SetData( char unsigned *data, int new_width, int new_height );
 188
 189     // Mask functions
 190     void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
 191     unsigned char GetMaskRed() const;
 192     unsigned char GetMaskGreen() const;
 193     unsigned char GetMaskBlue() const;
 194     void SetMask( bool mask = TRUE );
 195     bool HasMask() const;
 196
 197 #if wxUSE_PALETTE
 198     // Palette functions
 199     bool HasPalette() const;
 200     const wxPalette& GetPalette() const;
 201     void SetPalette(const wxPalette& palette);
 202 #endif // wxUSE_PALETTE
 203
 204     // Option functions (arbitrary name/value mapping)
 205     void SetOption(const wxString& name, const wxString& value);
 206     void SetOption(const wxString& name, int value);
 207     wxString GetOption(const wxString& name) const;
 208     int GetOptionInt(const wxString& name) const;
 209     bool HasOption(const wxString& name) const;
 210
 211     unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 );
 212     unsigned long ComputeHistogram( wxHashTable &h );
 213
 214     wxImage& operator = (const wxImage& image)
 215     {
 216         if ( (*this) != image )
 217             Ref(image);
 218         return *this;
 219     }
 220
 221     bool operator == (const wxImage& image)
 222         { return m_refData == image.m_refData; }
 223     bool operator != (const wxImage& image)
 224         { return m_refData != image.m_refData; }
 225
 226     static wxList& GetHandlers() { return sm_handlers; }
 227     static void AddHandler( wxImageHandler *handler );
 228     static void InsertHandler( wxImageHandler *handler );
 229     static bool RemoveHandler( const wxString& name );
 230     static wxImageHandler *FindHandler( const wxString& name );
 231     static wxImageHandler *FindHandler( const wxString& extension, long imageType );
 232     static wxImageHandler *FindHandler( long imageType );
 233     static wxImageHandler *FindHandlerMime( const wxString& mimetype );
 234
 235     static void CleanUpHandlers();
 236     static void InitStandardHandlers();
 237
 238 protected:
 239     static wxList   sm_handlers;
 240
 241 private:
 242     friend class WXDLLEXPORT wxImageHandler;
 243
 244     DECLARE_DYNAMIC_CLASS(wxImage)
 245 };
 246
 247
 248 extern void WXDLLEXPORT wxInitAllImageHandlers();
 249
 250 WXDLLEXPORT_DATA(extern wxImage)    wxNullImage;
 251
 252 //-----------------------------------------------------------------------------
 253 // wxImage handlers
 254 //-----------------------------------------------------------------------------
 255
 256 #include "wx/imagbmp.h"
 257 #include "wx/imagpng.h"
 258 #include "wx/imaggif.h"
 259 #include "wx/imagpcx.h"
 260 #include "wx/imagjpeg.h"
 261 #include "wx/imagtiff.h"
 262 #include "wx/imagpnm.h"
 263 #include "wx/imagxpm.h"
 264
 265 #endif // wxUSE_IMAGE
 266
 267 #endif
 268   // _WX_IMAGE_H_
 269