include/wx/image.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/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 #include "wx/defs.h"
  14
  15 #if wxUSE_IMAGE
  16
  17 #include "wx/object.h"
  18 #include "wx/string.h"
  19 #include "wx/gdicmn.h"
  20 #include "wx/hashmap.h"
  21
  22 #if wxUSE_STREAMS
  23 #  include "wx/stream.h"
  24 #endif
  25
  26 // on some systems (Unixware 7.x) index is defined as a macro in the headers
  27 // which breaks the compilation below
  28 #undef index
  29
  30 #define wxIMAGE_OPTION_QUALITY  wxString(_T("quality"))
  31 #define wxIMAGE_OPTION_FILENAME wxString(_T("FileName"))
  32
  33 #define wxIMAGE_OPTION_RESOLUTION            wxString(_T("Resolution"))
  34 #define wxIMAGE_OPTION_RESOLUTIONX           wxString(_T("ResolutionX"))
  35 #define wxIMAGE_OPTION_RESOLUTIONY           wxString(_T("ResolutionY"))
  36
  37 #define wxIMAGE_OPTION_RESOLUTIONUNIT        wxString(_T("ResolutionUnit"))
  38
  39 #define wxIMAGE_OPTION_MAX_WIDTH             wxString(_T("MaxWidth"))
  40 #define wxIMAGE_OPTION_MAX_HEIGHT            wxString(_T("MaxHeight"))
  41
  42 // constants used with wxIMAGE_OPTION_RESOLUTIONUNIT
  43 //
  44 // NB: don't change these values, they correspond to libjpeg constants
  45 enum wxImageResolution
  46 {
  47     // Resolution not specified
  48     wxIMAGE_RESOLUTION_NONE = 0,
  49
  50     // Resolution specified in inches
  51     wxIMAGE_RESOLUTION_INCHES = 1,
  52
  53     // Resolution specified in centimeters
  54     wxIMAGE_RESOLUTION_CM = 2
  55 };
  56
  57 // Constants for wxImage::Scale() for determining the level of quality
  58 enum
  59 {
  60     wxIMAGE_QUALITY_NORMAL = 0,
  61     wxIMAGE_QUALITY_HIGH = 1
  62 };
  63
  64 // alpha channel values: fully transparent, default threshold separating
  65 // transparent pixels from opaque for a few functions dealing with alpha and
  66 // fully opaque
  67 const unsigned char wxIMAGE_ALPHA_TRANSPARENT = 0;
  68 const unsigned char wxIMAGE_ALPHA_THRESHOLD = 0x80;
  69 const unsigned char wxIMAGE_ALPHA_OPAQUE = 0xff;
  70
  71 //-----------------------------------------------------------------------------
  72 // classes
  73 //-----------------------------------------------------------------------------
  74
  75 class WXDLLIMPEXP_FWD_CORE wxImageHandler;
  76 class WXDLLIMPEXP_FWD_CORE wxImage;
  77 class WXDLLIMPEXP_FWD_CORE wxPalette;
  78
  79 //-----------------------------------------------------------------------------
  80 // wxVariant support
  81 //-----------------------------------------------------------------------------
  82
  83 #if wxUSE_VARIANT
  84 #include "wx/variant.h"
  85 DECLARE_VARIANT_OBJECT_EXPORTED(wxImage,WXDLLIMPEXP_CORE)
  86 #endif
  87
  88 //-----------------------------------------------------------------------------
  89 // wxImageHandler
  90 //-----------------------------------------------------------------------------
  91
  92 class WXDLLIMPEXP_CORE wxImageHandler: public wxObject
  93 {
  94 public:
  95     wxImageHandler()
  96         : m_name(wxEmptyString), m_extension(wxEmptyString), m_mime(), m_type(wxBITMAP_TYPE_INVALID)
  97         { }
  98
  99 #if wxUSE_STREAMS
 100     virtual bool LoadFile( wxImage *image, wxInputStream& stream, bool verbose=true, int index=-1 );
 101     virtual bool SaveFile( wxImage *image, wxOutputStream& stream, bool verbose=true );
 102
 103     virtual int GetImageCount( wxInputStream& stream );
 104
 105     bool CanRead( wxInputStream& stream ) { return CallDoCanRead(stream); }
 106     bool CanRead( const wxString& name );
 107 #endif // wxUSE_STREAMS
 108
 109     void SetName(const wxString& name) { m_name = name; }
 110     void SetExtension(const wxString& ext) { m_extension = ext; }
 111     void SetAlExtensions(const wxArrayString& exts) { m_altExtensions = exts; }
 112     void SetType(wxBitmapType type) { m_type = type; }
 113     void SetMimeType(const wxString& type) { m_mime = type; }
 114     const wxString& GetName() const { return m_name; }
 115     const wxString& GetExtension() const { return m_extension; }
 116     const wxArrayString& GetAltExtensions() const { return m_altExtensions; }
 117     wxBitmapType GetType() const { return m_type; }
 118     const wxString& GetMimeType() const { return m_mime; }
 119
 120 #if WXWIN_COMPATIBILITY_2_8
 121     wxDEPRECATED(
 122         void SetType(long type) { SetType((wxBitmapType)type); }
 123     )
 124 #endif // WXWIN_COMPATIBILITY_2_8
 125
 126 protected:
 127 #if wxUSE_STREAMS
 128     virtual bool DoCanRead( wxInputStream& stream ) = 0;
 129
 130     // save the stream position, call DoCanRead() and restore the position
 131     bool CallDoCanRead(wxInputStream& stream);
 132 #endif // wxUSE_STREAMS
 133
 134     // helper for the derived classes SaveFile() implementations: returns the
 135     // values of x- and y-resolution options specified as the image options if
 136     // any
 137     static wxImageResolution
 138     GetResolutionFromOptions(const wxImage& image, int *x, int *y);
 139
 140
 141     wxString  m_name;
 142     wxString  m_extension;
 143     wxArrayString m_altExtensions;
 144     wxString  m_mime;
 145     wxBitmapType m_type;
 146
 147 private:
 148     DECLARE_CLASS(wxImageHandler)
 149 };
 150
 151 //-----------------------------------------------------------------------------
 152 // wxImageHistogram
 153 //-----------------------------------------------------------------------------
 154
 155 class WXDLLIMPEXP_CORE wxImageHistogramEntry
 156 {
 157 public:
 158     wxImageHistogramEntry() { index = value = 0; }
 159     unsigned long index;
 160     unsigned long value;
 161 };
 162
 163 WX_DECLARE_EXPORTED_HASH_MAP(unsigned long, wxImageHistogramEntry,
 164                              wxIntegerHash, wxIntegerEqual,
 165                              wxImageHistogramBase);
 166
 167 class WXDLLIMPEXP_CORE wxImageHistogram : public wxImageHistogramBase
 168 {
 169 public:
 170     wxImageHistogram() : wxImageHistogramBase(256) { }
 171
 172     // get the key in the histogram for the given RGB values
 173     static unsigned long MakeKey(unsigned char r,
 174                                  unsigned char g,
 175                                  unsigned char b)
 176     {
 177         return (r << 16) | (g << 8) | b;
 178     }
 179
 180     // find first colour that is not used in the image and has higher
 181     // RGB values than RGB(startR, startG, startB)
 182     //
 183     // returns true and puts this colour in r, g, b (each of which may be NULL)
 184     // on success or returns false if there are no more free colours
 185     bool FindFirstUnusedColour(unsigned char *r,
 186                                unsigned char *g,
 187                                unsigned char *b,
 188                                unsigned char startR = 1,
 189                                unsigned char startG = 0,
 190                                unsigned char startB = 0 ) const;
 191 };
 192
 193 //-----------------------------------------------------------------------------
 194 // wxImage
 195 //-----------------------------------------------------------------------------
 196
 197 class WXDLLIMPEXP_CORE wxImage: public wxObject
 198 {
 199 public:
 200     // red, green and blue are 8 bit unsigned integers in the range of 0..255
 201     // We use the identifier RGBValue instead of RGB, since RGB is #defined
 202     class RGBValue
 203     {
 204     public:
 205       RGBValue(unsigned char r=0, unsigned char g=0, unsigned char b=0)
 206         : red(r), green(g), blue(b) {}
 207         unsigned char red;
 208         unsigned char green;
 209         unsigned char blue;
 210     };
 211
 212     // hue, saturation and value are doubles in the range 0.0..1.0
 213     class HSVValue
 214     {
 215     public:
 216         HSVValue(double h=0.0, double s=0.0, double v=0.0)
 217             : hue(h), saturation(s), value(v) {}
 218         double hue;
 219         double saturation;
 220         double value;
 221     };
 222
 223     wxImage() {}
 224     wxImage( int width, int height, bool clear = true )
 225         { Create( width, height, clear ); }
 226     wxImage( int width, int height, unsigned char* data, bool static_data = false )
 227         { Create( width, height, data, static_data ); }
 228     wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data = false )
 229         { Create( width, height, data, alpha, static_data ); }
 230
 231     // ctor variants using wxSize:
 232     wxImage( const wxSize& sz, bool clear = true )
 233         { Create( sz, clear ); }
 234     wxImage( const wxSize& sz, unsigned char* data, bool static_data = false )
 235         { Create( sz, data, static_data ); }
 236     wxImage( const wxSize& sz, unsigned char* data, unsigned char* alpha, bool static_data = false )
 237         { Create( sz, data, alpha, static_data ); }
 238
 239     wxImage( const wxString& name, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 )
 240         { LoadFile( name, type, index ); }
 241     wxImage( const wxString& name, const wxString& mimetype, int index = -1 )
 242         { LoadFile( name, mimetype, index ); }
 243     wxImage( const char* const* xpmData )
 244         { Create(xpmData); }
 245
 246 #if wxUSE_STREAMS
 247     wxImage( wxInputStream& stream, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 )
 248         { LoadFile( stream, type, index ); }
 249     wxImage( wxInputStream& stream, const wxString& mimetype, int index = -1 )
 250         { LoadFile( stream, mimetype, index ); }
 251 #endif // wxUSE_STREAMS
 252
 253     bool Create( const char* const* xpmData );
 254 #ifdef __BORLANDC__
 255     // needed for Borland 5.5
 256     wxImage( char** xpmData ) { Create(const_cast<const char* const*>(xpmData)); }
 257     bool Create( char** xpmData ) { return Create(const_cast<const char* const*>(xpmData)); }
 258 #endif
 259
 260     bool Create( int width, int height, bool clear = true );
 261     bool Create( int width, int height, unsigned char* data, bool static_data = false );
 262     bool Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data = false );
 263
 264     // Create() variants using wxSize:
 265     bool Create( const wxSize& sz, bool clear = true )
 266         { return Create(sz.GetWidth(), sz.GetHeight(), clear); }
 267     bool Create( const wxSize& sz, unsigned char* data, bool static_data = false )
 268         { return Create(sz.GetWidth(), sz.GetHeight(), data, static_data); }
 269     bool Create( const wxSize& sz, unsigned char* data, unsigned char* alpha, bool static_data = false )
 270         { return Create(sz.GetWidth(), sz.GetHeight(), data, alpha, static_data); }
 271
 272     void Destroy();
 273
 274     // initialize the image data with zeroes
 275     void Clear(unsigned char value = 0);
 276
 277     // creates an identical copy of the image (the = operator
 278     // just raises the ref count)
 279     wxImage Copy() const;
 280
 281     // return the new image with size width*height
 282     wxImage GetSubImage( const wxRect& rect) const;
 283
 284     // Paste the image or part of this image into an image of the given size at the pos
 285     //  any newly exposed areas will be filled with the rgb colour
 286     //  by default if r = g = b = -1 then fill with this image's mask colour or find and
 287     //  set a suitable mask colour
 288     wxImage Size( const wxSize& size, const wxPoint& pos,
 289                   int r = -1, int g = -1, int b = -1 ) const;
 290
 291     // pastes image into this instance and takes care of
 292     // the mask colour and out of bounds problems
 293     void Paste( const wxImage &image, int x, int y );
 294
 295     // return the new image with size width*height
 296     wxImage Scale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) const;
 297
 298     // box averager and bicubic filters for up/down sampling
 299     wxImage ResampleBox(int width, int height) const;
 300     wxImage ResampleBicubic(int width, int height) const;
 301
 302     // blur the image according to the specified pixel radius
 303     wxImage Blur(int radius) const;
 304     wxImage BlurHorizontal(int radius) const;
 305     wxImage BlurVertical(int radius) const;
 306
 307     wxImage ShrinkBy( int xFactor , int yFactor ) const ;
 308
 309     // rescales the image in place
 310     wxImage& Rescale( int width, int height, int quality = wxIMAGE_QUALITY_NORMAL ) { return *this = Scale(width, height, quality); }
 311
 312     // resizes the image in place
 313     wxImage& Resize( const wxSize& size, const wxPoint& pos,
 314                      int r = -1, int g = -1, int b = -1 ) { return *this = Size(size, pos, r, g, b); }
 315
 316     // Rotates the image about the given point, 'angle' radians.
 317     // Returns the rotated image, leaving this image intact.
 318     wxImage Rotate(double angle, const wxPoint & centre_of_rotation,
 319                    bool interpolating = true, wxPoint * offset_after_rotation = NULL) const;
 320
 321     wxImage Rotate90( bool clockwise = true ) const;
 322     wxImage Mirror( bool horizontally = true ) const;
 323
 324     // replace one colour with another
 325     void Replace( unsigned char r1, unsigned char g1, unsigned char b1,
 326                   unsigned char r2, unsigned char g2, unsigned char b2 );
 327
 328     // Convert to greyscale image. Uses the luminance component (Y) of the image.
 329     // The luma value (YUV) is calculated using (R * lr) + (G * lg) + (B * lb), defaults to ITU-T BT.601
 330     wxImage ConvertToGreyscale( double lr = 0.299, double lg = 0.587, double lb = 0.114 ) const;
 331
 332     // convert to monochrome image (<r,g,b> will be replaced by white,
 333     // everything else by black)
 334     wxImage ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const;
 335
 336     // these routines are slow but safe
 337     void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
 338     void SetRGB( const wxRect& rect, unsigned char r, unsigned char g, unsigned char b );
 339     unsigned char GetRed( int x, int y ) const;
 340     unsigned char GetGreen( int x, int y ) const;
 341     unsigned char GetBlue( int x, int y ) const;
 342
 343     void SetAlpha(int x, int y, unsigned char alpha);
 344     unsigned char GetAlpha(int x, int y) const;
 345
 346     // find first colour that is not used in the image and has higher
 347     // RGB values than <startR,startG,startB>
 348     bool FindFirstUnusedColour( unsigned char *r, unsigned char *g, unsigned char *b,
 349                                 unsigned char startR = 1, unsigned char startG = 0,
 350                                 unsigned char startB = 0 ) const;
 351     // Set image's mask to the area of 'mask' that has <r,g,b> colour
 352     bool SetMaskFromImage(const wxImage & mask,
 353                           unsigned char mr, unsigned char mg, unsigned char mb);
 354
 355     // converts image's alpha channel to mask (choosing mask colour
 356     // automatically or using the specified colour for the mask), if it has
 357     // any, does nothing otherwise:
 358     bool ConvertAlphaToMask(unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
 359     void ConvertAlphaToMask(unsigned char mr, unsigned char mg, unsigned char mb,
 360                             unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
 361
 362
 363     // This method converts an image where the original alpha
 364     // information is only available as a shades of a colour
 365     // (actually shades of grey) typically when you draw anti-
 366     // aliased text into a bitmap. The DC drawinf routines
 367     // draw grey values on the black background although they
 368     // actually mean to draw white with differnt alpha values.
 369     // This method reverses it, assuming a black (!) background
 370     // and white text (actually only the red channel is read).
 371     // The method will then fill up the whole image with the
 372     // colour given.
 373     bool ConvertColourToAlpha( unsigned char r, unsigned char g, unsigned char b );
 374
 375     static bool CanRead( const wxString& name );
 376     static int GetImageCount( const wxString& name, wxBitmapType type = wxBITMAP_TYPE_ANY );
 377     virtual bool LoadFile( const wxString& name, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 );
 378     virtual bool LoadFile( const wxString& name, const wxString& mimetype, int index = -1 );
 379
 380 #if wxUSE_STREAMS
 381     static bool CanRead( wxInputStream& stream );
 382     static int GetImageCount( wxInputStream& stream, wxBitmapType type = wxBITMAP_TYPE_ANY );
 383     virtual bool LoadFile( wxInputStream& stream, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 );
 384     virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype, int index = -1 );
 385 #endif
 386
 387     virtual bool SaveFile( const wxString& name ) const;
 388     virtual bool SaveFile( const wxString& name, wxBitmapType type ) const;
 389     virtual bool SaveFile( const wxString& name, const wxString& mimetype ) const;
 390
 391 #if wxUSE_STREAMS
 392     virtual bool SaveFile( wxOutputStream& stream, wxBitmapType type ) const;
 393     virtual bool SaveFile( wxOutputStream& stream, const wxString& mimetype ) const;
 394 #endif
 395
 396     bool Ok() const { return IsOk(); }
 397     bool IsOk() const;
 398     int GetWidth() const;
 399     int GetHeight() const;
 400
 401     wxSize GetSize() const
 402         { return wxSize(GetWidth(), GetHeight()); }
 403
 404     // Gets the type of image found by LoadFile or specified with SaveFile
 405     wxBitmapType GetType() const;
 406
 407     // Set the image type, this is normally only called if the image is being
 408     // created from data in the given format but not using LoadFile() (e.g.
 409     // wxGIFDecoder uses this)
 410     void SetType(wxBitmapType type);
 411
 412     // these functions provide fastest access to wxImage data but should be
 413     // used carefully as no checks are done
 414     unsigned char *GetData() const;
 415     void SetData( unsigned char *data, bool static_data=false );
 416     void SetData( unsigned char *data, int new_width, int new_height, bool static_data=false );
 417
 418     unsigned char *GetAlpha() const;    // may return NULL!
 419     bool HasAlpha() const { return GetAlpha() != NULL; }
 420     void SetAlpha(unsigned char *alpha = NULL, bool static_data=false);
 421     void InitAlpha();
 422
 423     // return true if this pixel is masked or has alpha less than specified
 424     // threshold
 425     bool IsTransparent(int x, int y,
 426                        unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD) const;
 427
 428     // Mask functions
 429     void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
 430     // Get the current mask colour or find a suitable colour
 431     // returns true if using current mask colour
 432     bool GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const;
 433     unsigned char GetMaskRed() const;
 434     unsigned char GetMaskGreen() const;
 435     unsigned char GetMaskBlue() const;
 436     void SetMask( bool mask = true );
 437     bool HasMask() const;
 438
 439 #if wxUSE_PALETTE
 440     // Palette functions
 441     bool HasPalette() const;
 442     const wxPalette& GetPalette() const;
 443     void SetPalette(const wxPalette& palette);
 444 #endif // wxUSE_PALETTE
 445
 446     // Option functions (arbitrary name/value mapping)
 447     void SetOption(const wxString& name, const wxString& value);
 448     void SetOption(const wxString& name, int value);
 449     wxString GetOption(const wxString& name) const;
 450     int GetOptionInt(const wxString& name) const;
 451     bool HasOption(const wxString& name) const;
 452
 453     unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 ) const;
 454
 455     // Computes the histogram of the image and fills a hash table, indexed
 456     // with integer keys built as 0xRRGGBB, containing wxImageHistogramEntry
 457     // objects. Each of them contains an 'index' (useful to build a palette
 458     // with the image colours) and a 'value', which is the number of pixels
 459     // in the image with that colour.
 460     // Returned value: # of entries in the histogram
 461     unsigned long ComputeHistogram( wxImageHistogram &h ) const;
 462
 463     // Rotates the hue of each pixel of the image. angle is a double in the range
 464     // -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees
 465     void RotateHue(double angle);
 466
 467     static wxList& GetHandlers() { return sm_handlers; }
 468     static void AddHandler( wxImageHandler *handler );
 469     static void InsertHandler( wxImageHandler *handler );
 470     static bool RemoveHandler( const wxString& name );
 471     static wxImageHandler *FindHandler( const wxString& name );
 472     static wxImageHandler *FindHandler( const wxString& extension, wxBitmapType imageType );
 473     static wxImageHandler *FindHandler( wxBitmapType imageType );
 474
 475     static wxImageHandler *FindHandlerMime( const wxString& mimetype );
 476
 477     static wxString GetImageExtWildcard();
 478
 479     static void CleanUpHandlers();
 480     static void InitStandardHandlers();
 481
 482     static HSVValue RGBtoHSV(const RGBValue& rgb);
 483     static RGBValue HSVtoRGB(const HSVValue& hsv);
 484
 485 #if WXWIN_COMPATIBILITY_2_8
 486     wxDEPRECATED_CONSTRUCTOR(
 487         wxImage(const wxString& name, long type, int index = -1)
 488         {
 489             LoadFile(name, (wxBitmapType)type, index);
 490         }
 491     )
 492
 493 #if wxUSE_STREAMS
 494     wxDEPRECATED_CONSTRUCTOR(
 495         wxImage(wxInputStream& stream, long type, int index = -1)
 496         {
 497             LoadFile(stream, (wxBitmapType)type, index);
 498         }
 499     )
 500
 501     wxDEPRECATED(
 502         bool LoadFile(wxInputStream& stream, long type, int index = -1)
 503         {
 504             return LoadFile(stream, (wxBitmapType)type, index);
 505         }
 506     )
 507
 508     wxDEPRECATED(
 509         bool SaveFile(wxOutputStream& stream, long type) const
 510         {
 511             return SaveFile(stream, (wxBitmapType)type);
 512         }
 513     )
 514 #endif // wxUSE_STREAMS
 515
 516     wxDEPRECATED(
 517         bool LoadFile(const wxString& name, long type, int index = -1)
 518         {
 519             return LoadFile(name, (wxBitmapType)type, index);
 520         }
 521     )
 522
 523     wxDEPRECATED(
 524         bool SaveFile(const wxString& name, long type) const
 525         {
 526             return SaveFile(name, (wxBitmapType)type);
 527         }
 528     )
 529
 530     wxDEPRECATED(
 531         static wxImageHandler *FindHandler(const wxString& ext, long type)
 532         {
 533             return FindHandler(ext, (wxBitmapType)type);
 534         }
 535     )
 536
 537     wxDEPRECATED(
 538         static wxImageHandler *FindHandler(long imageType)
 539         {
 540             return FindHandler((wxBitmapType)imageType);
 541         }
 542     )
 543 #endif // WXWIN_COMPATIBILITY_2_8
 544
 545 protected:
 546     static wxList   sm_handlers;
 547
 548     // return the index of the point with the given coordinates or -1 if the
 549     // image is invalid of the coordinates are out of range
 550     //
 551     // note that index must be multiplied by 3 when using it with RGB array
 552     long XYToIndex(int x, int y) const;
 553
 554     virtual wxObjectRefData* CreateRefData() const;
 555     virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
 556
 557 private:
 558     friend class WXDLLIMPEXP_FWD_CORE wxImageHandler;
 559
 560 #if wxUSE_STREAMS
 561     // read the image from the specified stream updating image type if
 562     // successful
 563     bool DoLoad(wxImageHandler& handler, wxInputStream& stream, int index);
 564
 565     // write the image to the specified stream and also update the image type
 566     // if successful
 567     bool DoSave(wxImageHandler& handler, wxOutputStream& stream) const;
 568 #endif // wxUSE_STREAMS
 569
 570     DECLARE_DYNAMIC_CLASS(wxImage)
 571 };
 572
 573
 574 extern void WXDLLIMPEXP_CORE wxInitAllImageHandlers();
 575
 576 extern WXDLLIMPEXP_DATA_CORE(wxImage)    wxNullImage;
 577
 578 //-----------------------------------------------------------------------------
 579 // wxImage handlers
 580 //-----------------------------------------------------------------------------
 581
 582 #include "wx/imagbmp.h"
 583 #include "wx/imagpng.h"
 584 #include "wx/imaggif.h"
 585 #include "wx/imagpcx.h"
 586 #include "wx/imagjpeg.h"
 587 #include "wx/imagtga.h"
 588 #include "wx/imagtiff.h"
 589 #include "wx/imagpnm.h"
 590 #include "wx/imagxpm.h"
 591 #include "wx/imagiff.h"
 592
 593 #endif // wxUSE_IMAGE
 594
 595 #endif
 596   // _WX_IMAGE_H_