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 #include "wx/hashmap.h"
  23
  24 #if wxUSE_STREAMS
  25 #  include "wx/stream.h"
  26 #endif
  27
  28 #if wxUSE_IMAGE
  29
  30 #define wxIMAGE_OPTION_FILENAME wxString(_T("FileName"))
  31
  32 //-----------------------------------------------------------------------------
  33 // classes
  34 //-----------------------------------------------------------------------------
  35
  36 class WXDLLEXPORT wxImageHandler;
  37 class WXDLLEXPORT wxImage;
  38
  39 //-----------------------------------------------------------------------------
  40 // wxImageHandler
  41 //-----------------------------------------------------------------------------
  42
  43 class WXDLLEXPORT wxImageHandler: public wxObject
  44 {
  45 public:
  46     wxImageHandler() { m_name = ""; m_extension = ""; m_type = 0; }
  47
  48 #if wxUSE_STREAMS
  49     virtual bool LoadFile( wxImage *image, wxInputStream& stream, bool verbose=TRUE, int index=-1 );
  50     virtual bool SaveFile( wxImage *image, wxOutputStream& stream, bool verbose=TRUE );
  51
  52     virtual int GetImageCount( wxInputStream& stream );
  53
  54     bool CanRead( wxInputStream& stream ) { return DoCanRead(stream); }
  55     bool CanRead( const wxString& name );
  56 #endif // wxUSE_STREAMS
  57
  58     void SetName(const wxString& name) { m_name = name; }
  59     void SetExtension(const wxString& ext) { m_extension = ext; }
  60     void SetType(long type) { m_type = type; }
  61     void SetMimeType(const wxString& type) { m_mime = type; }
  62     wxString GetName() const { return m_name; }
  63     wxString GetExtension() const { return m_extension; }
  64     long GetType() const { return m_type; }
  65     wxString GetMimeType() const { return m_mime; }
  66
  67 protected:
  68 #if wxUSE_STREAMS
  69     virtual bool DoCanRead( wxInputStream& stream ) = 0;
  70 #endif // wxUSE_STREAMS
  71
  72     wxString  m_name;
  73     wxString  m_extension;
  74     wxString  m_mime;
  75     long      m_type;
  76
  77 private:
  78     DECLARE_CLASS(wxImageHandler)
  79 };
  80
  81 //-----------------------------------------------------------------------------
  82 // wxImageHistogram
  83 //-----------------------------------------------------------------------------
  84
  85 class WXDLLEXPORT wxImageHistogramEntry
  86 {
  87 public:
  88     wxImageHistogramEntry() : index(0), value(0) {}
  89     unsigned long index;
  90     unsigned long value;
  91 };
  92
  93 WX_DECLARE_EXPORTED_HASH_MAP(unsigned long, wxImageHistogramEntry,
  94                              wxIntegerHash, wxIntegerEqual,
  95                              wxImageHistogram);
  96
  97 //-----------------------------------------------------------------------------
  98 // wxImage
  99 //-----------------------------------------------------------------------------
 100
 101 class WXDLLEXPORT wxImage: public wxObject
 102 {
 103 public:
 104     wxImage();
 105     wxImage( int width, int height );
 106     wxImage( int width, int height, unsigned char* data, bool static_data = FALSE );
 107     wxImage( const wxString& name, long type = wxBITMAP_TYPE_ANY, int index = -1 );
 108     wxImage( const wxString& name, const wxString& mimetype, int index = -1 );
 109
 110 #if wxUSE_STREAMS
 111     wxImage( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY, int index = -1 );
 112     wxImage( wxInputStream& stream, const wxString& mimetype, int index = -1 );
 113 #endif // wxUSE_STREAMS
 114
 115     wxImage( const wxImage& image );
 116     wxImage( const wxImage* image );
 117
 118 #if WXWIN_COMPATIBILITY_2_2 && wxUSE_GUI
 119     // convertion to/from wxBitmap (deprecated, use wxBitmap's methods instead):
 120     wxImage( const wxBitmap &bitmap );
 121     wxBitmap ConvertToBitmap() const;
 122 #ifdef __WXGTK__
 123     wxBitmap ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue ) const;
 124 #endif
 125 #endif
 126
 127     void Create( int width, int height );
 128     void Create( int width, int height, unsigned char* data, bool static_data = FALSE );
 129     void Destroy();
 130
 131     // creates an identical copy of the image (the = operator
 132     // just raises the ref count)
 133     wxImage Copy() const;
 134
 135     // return the new image with size width*height
 136     wxImage GetSubImage( const wxRect& ) const;
 137
 138     // pastes image into this instance and takes care of
 139     // the mask colour and out of bounds problems
 140     void Paste( const wxImage &image, int x, int y );
 141
 142     // return the new image with size width*height
 143     wxImage Scale( int width, int height ) const;
 144
 145     // rescales the image in place
 146     wxImage& Rescale( int width, int height ) { return *this = Scale(width, height); }
 147
 148     // Rotates the image about the given point, 'angle' radians.
 149     // Returns the rotated image, leaving this image intact.
 150     wxImage Rotate(double angle, const wxPoint & centre_of_rotation,
 151                    bool interpolating = TRUE, wxPoint * offset_after_rotation = (wxPoint*) NULL) const;
 152
 153     wxImage Rotate90( bool clockwise = TRUE ) const;
 154     wxImage Mirror( bool horizontally = TRUE ) const;
 155
 156     // replace one colour with another
 157     void Replace( unsigned char r1, unsigned char g1, unsigned char b1,
 158                   unsigned char r2, unsigned char g2, unsigned char b2 );
 159
 160     // convert to monochrome image (<r,g,b> will be replaced by white, everything else by black)
 161     wxImage ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const;
 162
 163     // these routines are slow but safe
 164     void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
 165     unsigned char GetRed( int x, int y ) const;
 166     unsigned char GetGreen( int x, int y ) const;
 167     unsigned char GetBlue( int x, int y ) const;
 168
 169     // find first colour that is not used in the image and has higher
 170     // RGB values than <startR,startG,startB>
 171     bool FindFirstUnusedColour( unsigned char *r, unsigned char *g, unsigned char *b,
 172                                 unsigned char startR = 1, unsigned char startG = 0,
 173                                 unsigned char startB = 0 ) const;
 174     // Set image's mask to the area of 'mask' that has <r,g,b> colour
 175     bool SetMaskFromImage(const wxImage & mask,
 176                           unsigned char mr, unsigned char mg, unsigned char mb);
 177
 178     static bool CanRead( const wxString& name );
 179     static int GetImageCount( const wxString& name, long type = wxBITMAP_TYPE_ANY );
 180     virtual bool LoadFile( const wxString& name, long type = wxBITMAP_TYPE_ANY, int index = -1 );
 181     virtual bool LoadFile( const wxString& name, const wxString& mimetype, int index = -1 );
 182
 183 #if wxUSE_STREAMS
 184     static bool CanRead( wxInputStream& stream );
 185     static int GetImageCount( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY );
 186     virtual bool LoadFile( wxInputStream& stream, long type = wxBITMAP_TYPE_ANY, int index = -1 );
 187     virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype, int index = -1 );
 188 #endif
 189
 190     virtual bool SaveFile( const wxString& name ) const;
 191     virtual bool SaveFile( const wxString& name, int type ) const;
 192     virtual bool SaveFile( const wxString& name, const wxString& mimetype ) const;
 193
 194 #if wxUSE_STREAMS
 195     virtual bool SaveFile( wxOutputStream& stream, int type ) const;
 196     virtual bool SaveFile( wxOutputStream& stream, const wxString& mimetype ) const;
 197 #endif
 198
 199     bool Ok() const;
 200     int GetWidth() const;
 201     int GetHeight() const;
 202
 203     char unsigned *GetData() const;
 204     void SetData( char unsigned *data );
 205     void SetData( char unsigned *data, int new_width, int new_height );
 206
 207     // Mask functions
 208     void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
 209     unsigned char GetMaskRed() const;
 210     unsigned char GetMaskGreen() const;
 211     unsigned char GetMaskBlue() const;
 212     void SetMask( bool mask = TRUE );
 213     bool HasMask() const;
 214
 215 #if wxUSE_PALETTE
 216     // Palette functions
 217     bool HasPalette() const;
 218     const wxPalette& GetPalette() const;
 219     void SetPalette(const wxPalette& palette);
 220 #endif // wxUSE_PALETTE
 221
 222     // Option functions (arbitrary name/value mapping)
 223     void SetOption(const wxString& name, const wxString& value);
 224     void SetOption(const wxString& name, int value);
 225     wxString GetOption(const wxString& name) const;
 226     int GetOptionInt(const wxString& name) const;
 227     bool HasOption(const wxString& name) const;
 228
 229     unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 ) const;
 230
 231     // Computes the histogram of the image and fills a hash table, indexed
 232     // with integer keys built as 0xRRGGBB, containing wxImageHistogramEntry
 233     // objects. Each of them contains an 'index' (useful to build a palette
 234     // with the image colours) and a 'value', which is the number of pixels
 235     // in the image with that colour.
 236     // Returned value: # of entries in the histogram
 237     unsigned long ComputeHistogram( wxImageHistogram &h ) const;
 238
 239     wxImage& operator = (const wxImage& image)
 240     {
 241         if ( (*this) != image )
 242             Ref(image);
 243         return *this;
 244     }
 245
 246     bool operator == (const wxImage& image)
 247         { return m_refData == image.m_refData; }
 248     bool operator != (const wxImage& image)
 249         { return m_refData != image.m_refData; }
 250
 251     static wxList& GetHandlers() { return sm_handlers; }
 252     static void AddHandler( wxImageHandler *handler );
 253     static void InsertHandler( wxImageHandler *handler );
 254     static bool RemoveHandler( const wxString& name );
 255     static wxImageHandler *FindHandler( const wxString& name );
 256     static wxImageHandler *FindHandler( const wxString& extension, long imageType );
 257     static wxImageHandler *FindHandler( long imageType );
 258     static wxImageHandler *FindHandlerMime( const wxString& mimetype );
 259
 260     static void CleanUpHandlers();
 261     static void InitStandardHandlers();
 262
 263 protected:
 264     static wxList   sm_handlers;
 265
 266 private:
 267     friend class WXDLLEXPORT wxImageHandler;
 268
 269     DECLARE_DYNAMIC_CLASS(wxImage)
 270 };
 271
 272
 273 extern void WXDLLEXPORT wxInitAllImageHandlers();
 274
 275 WXDLLEXPORT_DATA(extern wxImage)    wxNullImage;
 276
 277 //-----------------------------------------------------------------------------
 278 // wxImage handlers
 279 //-----------------------------------------------------------------------------
 280
 281 #include "wx/imagbmp.h"
 282 #include "wx/imagpng.h"
 283 #include "wx/imaggif.h"
 284 #include "wx/imagpcx.h"
 285 #include "wx/imagjpeg.h"
 286 #include "wx/imagtiff.h"
 287 #include "wx/imagpnm.h"
 288 #include "wx/imagxpm.h"
 289 #include "wx/imagiff.h"
 290
 291 #endif // wxUSE_IMAGE
 292
 293 #endif
 294   // _WX_IMAGE_H_
 295