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