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 #include "wx/arrstr.h"
  22
  23 #if wxUSE_STREAMS
  24 #  include "wx/stream.h"
  25 #endif
  26
  27 // on some systems (Unixware 7.x) index is defined as a macro in the headers
  28 // which breaks the compilation below
  29 #undef index
  30
  31 #define wxIMAGE_OPTION_QUALITY  wxString(wxT("quality"))
  32 #define wxIMAGE_OPTION_FILENAME wxString(wxT("FileName"))
  33
  34 #define wxIMAGE_OPTION_RESOLUTION            wxString(wxT("Resolution"))
  35 #define wxIMAGE_OPTION_RESOLUTIONX           wxString(wxT("ResolutionX"))
  36 #define wxIMAGE_OPTION_RESOLUTIONY           wxString(wxT("ResolutionY"))
  37
  38 #define wxIMAGE_OPTION_RESOLUTIONUNIT        wxString(wxT("ResolutionUnit"))
  39
  40 #define wxIMAGE_OPTION_MAX_WIDTH             wxString(wxT("MaxWidth"))
  41 #define wxIMAGE_OPTION_MAX_HEIGHT            wxString(wxT("MaxHeight"))
  42
  43 // constants used with wxIMAGE_OPTION_RESOLUTIONUNIT
  44 //
  45 // NB: don't change these values, they correspond to libjpeg constants
  46 enum wxImageResolution
  47 {
  48     // Resolution not specified
  49     wxIMAGE_RESOLUTION_NONE = 0,
  50
  51     // Resolution specified in inches
  52     wxIMAGE_RESOLUTION_INCHES = 1,
  53
  54     // Resolution specified in centimeters
  55     wxIMAGE_RESOLUTION_CM = 2
  56 };
  57
  58 // Constants for wxImage::Scale() for determining the level of quality
  59 enum wxImageResizeQuality
  60 {
  61     // different image resizing algorithms used by Scale() and Rescale()
  62     wxIMAGE_QUALITY_NEAREST = 0,
  63     wxIMAGE_QUALITY_BILINEAR = 1,
  64     wxIMAGE_QUALITY_BICUBIC = 2,
  65
  66     // default quality is low (but fast)
  67     wxIMAGE_QUALITY_NORMAL = wxIMAGE_QUALITY_NEAREST,
  68
  69     // highest (but best) quality
  70     wxIMAGE_QUALITY_HIGH = wxIMAGE_QUALITY_BICUBIC
  71 };
  72
  73 // alpha channel values: fully transparent, default threshold separating
  74 // transparent pixels from opaque for a few functions dealing with alpha and
  75 // fully opaque
  76 const unsigned char wxIMAGE_ALPHA_TRANSPARENT = 0;
  77 const unsigned char wxIMAGE_ALPHA_THRESHOLD = 0x80;
  78 const unsigned char wxIMAGE_ALPHA_OPAQUE = 0xff;
  79
  80 //-----------------------------------------------------------------------------
  81 // classes
  82 //-----------------------------------------------------------------------------
  83
  84 class WXDLLIMPEXP_FWD_CORE wxImageHandler;
  85 class WXDLLIMPEXP_FWD_CORE wxImage;
  86 class WXDLLIMPEXP_FWD_CORE wxPalette;
  87
  88 //-----------------------------------------------------------------------------
  89 // wxVariant support
  90 //-----------------------------------------------------------------------------
  91
  92 #if wxUSE_VARIANT
  93 #include "wx/variant.h"
  94 DECLARE_VARIANT_OBJECT_EXPORTED(wxImage,WXDLLIMPEXP_CORE)
  95 #endif
  96
  97 //-----------------------------------------------------------------------------
  98 // wxImageHandler
  99 //-----------------------------------------------------------------------------
 100
 101 class WXDLLIMPEXP_CORE wxImageHandler: public wxObject
 102 {
 103 public:
 104     wxImageHandler()
 105         : m_name(wxEmptyString), m_extension(wxEmptyString), m_mime(), m_type(wxBITMAP_TYPE_INVALID)
 106         { }
 107
 108 #if wxUSE_STREAMS
 109     // NOTE: LoadFile and SaveFile are not pure virtuals to allow derived classes
 110     //       to implement only one of the two
 111     virtual bool LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream),
 112                            bool WXUNUSED(verbose)=true, int WXUNUSED(index)=-1 )
 113         { return false; }
 114     virtual bool SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream),
 115                            bool WXUNUSED(verbose)=true )
 116         { return false; }
 117
 118     int GetImageCount( wxInputStream& stream );
 119         // save the stream position, call DoGetImageCount() and restore the position
 120
 121     bool CanRead( wxInputStream& stream ) { return CallDoCanRead(stream); }
 122     bool CanRead( const wxString& name );
 123 #endif // wxUSE_STREAMS
 124
 125     void SetName(const wxString& name) { m_name = name; }
 126     void SetExtension(const wxString& ext) { m_extension = ext; }
 127     void SetAltExtensions(const wxArrayString& exts) { m_altExtensions = exts; }
 128     void SetType(wxBitmapType type) { m_type = type; }
 129     void SetMimeType(const wxString& type) { m_mime = type; }
 130     const wxString& GetName() const { return m_name; }
 131     const wxString& GetExtension() const { return m_extension; }
 132     const wxArrayString& GetAltExtensions() const { return m_altExtensions; }
 133     wxBitmapType GetType() const { return m_type; }
 134     const wxString& GetMimeType() const { return m_mime; }
 135
 136 #if WXWIN_COMPATIBILITY_2_8
 137     wxDEPRECATED(
 138         void SetType(long type) { SetType((wxBitmapType)type); }
 139     )
 140 #endif // WXWIN_COMPATIBILITY_2_8
 141
 142 protected:
 143 #if wxUSE_STREAMS
 144     // NOTE: this function is allowed to change the current stream position
 145     //       since GetImageCount() will take care of restoring it later
 146     virtual int DoGetImageCount( wxInputStream& WXUNUSED(stream) )
 147         { return 1; }       // default return value is 1 image
 148
 149     // NOTE: this function is allowed to change the current stream position
 150     //       since CallDoCanRead() will take care of restoring it later
 151     virtual bool DoCanRead( wxInputStream& stream ) = 0;
 152
 153     // save the stream position, call DoCanRead() and restore the position
 154     bool CallDoCanRead(wxInputStream& stream);
 155 #endif // wxUSE_STREAMS
 156
 157     // helper for the derived classes SaveFile() implementations: returns the
 158     // values of x- and y-resolution options specified as the image options if
 159     // any
 160     static wxImageResolution
 161     GetResolutionFromOptions(const wxImage& image, int *x, int *y);
 162
 163
 164     wxString  m_name;
 165     wxString  m_extension;
 166     wxArrayString m_altExtensions;
 167     wxString  m_mime;
 168     wxBitmapType m_type;
 169
 170 private:
 171     DECLARE_CLASS(wxImageHandler)
 172 };
 173
 174 //-----------------------------------------------------------------------------
 175 // wxImageHistogram
 176 //-----------------------------------------------------------------------------
 177
 178 class WXDLLIMPEXP_CORE wxImageHistogramEntry
 179 {
 180 public:
 181     wxImageHistogramEntry() { index = value = 0; }
 182     unsigned long index;
 183     unsigned long value;
 184 };
 185
 186 WX_DECLARE_EXPORTED_HASH_MAP(unsigned long, wxImageHistogramEntry,
 187                              wxIntegerHash, wxIntegerEqual,
 188                              wxImageHistogramBase);
 189
 190 class WXDLLIMPEXP_CORE wxImageHistogram : public wxImageHistogramBase
 191 {
 192 public:
 193     wxImageHistogram() : wxImageHistogramBase(256) { }
 194
 195     // get the key in the histogram for the given RGB values
 196     static unsigned long MakeKey(unsigned char r,
 197                                  unsigned char g,
 198                                  unsigned char b)
 199     {
 200         return (r << 16) | (g << 8) | b;
 201     }
 202
 203     // find first colour that is not used in the image and has higher
 204     // RGB values than RGB(startR, startG, startB)
 205     //
 206     // returns true and puts this colour in r, g, b (each of which may be NULL)
 207     // on success or returns false if there are no more free colours
 208     bool FindFirstUnusedColour(unsigned char *r,
 209                                unsigned char *g,
 210                                unsigned char *b,
 211                                unsigned char startR = 1,
 212                                unsigned char startG = 0,
 213                                unsigned char startB = 0 ) const;
 214 };
 215
 216 //-----------------------------------------------------------------------------
 217 // wxImage
 218 //-----------------------------------------------------------------------------
 219
 220 class WXDLLIMPEXP_CORE wxImage: public wxObject
 221 {
 222 public:
 223     // red, green and blue are 8 bit unsigned integers in the range of 0..255
 224     // We use the identifier RGBValue instead of RGB, since RGB is #defined
 225     class RGBValue
 226     {
 227     public:
 228       RGBValue(unsigned char r=0, unsigned char g=0, unsigned char b=0)
 229         : red(r), green(g), blue(b) {}
 230         unsigned char red;
 231         unsigned char green;
 232         unsigned char blue;
 233     };
 234
 235     // hue, saturation and value are doubles in the range 0.0..1.0
 236     class HSVValue
 237     {
 238     public:
 239         HSVValue(double h=0.0, double s=0.0, double v=0.0)
 240             : hue(h), saturation(s), value(v) {}
 241         double hue;
 242         double saturation;
 243         double value;
 244     };
 245
 246     wxImage() {}
 247     wxImage( int width, int height, bool clear = true )
 248         { Create( width, height, clear ); }
 249     wxImage( int width, int height, unsigned char* data, bool static_data = false )
 250         { Create( width, height, data, static_data ); }
 251     wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data = false )
 252         { Create( width, height, data, alpha, static_data ); }
 253
 254     // ctor variants using wxSize:
 255     wxImage( const wxSize& sz, bool clear = true )
 256         { Create( sz, clear ); }
 257     wxImage( const wxSize& sz, unsigned char* data, bool static_data = false )
 258         { Create( sz, data, static_data ); }
 259     wxImage( const wxSize& sz, unsigned char* data, unsigned char* alpha, bool static_data = false )
 260         { Create( sz, data, alpha, static_data ); }
 261
 262     wxImage( const wxString& name, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 )
 263         { LoadFile( name, type, index ); }
 264     wxImage( const wxString& name, const wxString& mimetype, int index = -1 )
 265         { LoadFile( name, mimetype, index ); }
 266     wxImage( const char* const* xpmData )
 267         { Create(xpmData); }
 268
 269 #if wxUSE_STREAMS
 270     wxImage( wxInputStream& stream, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 )
 271         { LoadFile( stream, type, index ); }
 272     wxImage( wxInputStream& stream, const wxString& mimetype, int index = -1 )
 273         { LoadFile( stream, mimetype, index ); }
 274 #endif // wxUSE_STREAMS
 275
 276     bool Create( const char* const* xpmData );
 277 #ifdef __BORLANDC__
 278     // needed for Borland 5.5
 279     wxImage( char** xpmData ) { Create(const_cast<const char* const*>(xpmData)); }
 280     bool Create( char** xpmData ) { return Create(const_cast<const char* const*>(xpmData)); }
 281 #endif
 282
 283     bool Create( int width, int height, bool clear = true );
 284     bool Create( int width, int height, unsigned char* data, bool static_data = false );
 285     bool Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data = false );
 286
 287     // Create() variants using wxSize:
 288     bool Create( const wxSize& sz, bool clear = true )
 289         { return Create(sz.GetWidth(), sz.GetHeight(), clear); }
 290     bool Create( const wxSize& sz, unsigned char* data, bool static_data = false )
 291         { return Create(sz.GetWidth(), sz.GetHeight(), data, static_data); }
 292     bool Create( const wxSize& sz, unsigned char* data, unsigned char* alpha, bool static_data = false )
 293         { return Create(sz.GetWidth(), sz.GetHeight(), data, alpha, static_data); }
 294
 295     void Destroy();
 296
 297     // initialize the image data with zeroes
 298     void Clear(unsigned char value = 0);
 299
 300     // creates an identical copy of the image (the = operator
 301     // just raises the ref count)
 302     wxImage Copy() const;
 303
 304     // return the new image with size width*height
 305     wxImage GetSubImage( const wxRect& rect) const;
 306
 307     // Paste the image or part of this image into an image of the given size at the pos
 308     //  any newly exposed areas will be filled with the rgb colour
 309     //  by default if r = g = b = -1 then fill with this image's mask colour or find and
 310     //  set a suitable mask colour
 311     wxImage Size( const wxSize& size, const wxPoint& pos,
 312                   int r = -1, int g = -1, int b = -1 ) const;
 313
 314     // pastes image into this instance and takes care of
 315     // the mask colour and out of bounds problems
 316     void Paste( const wxImage &image, int x, int y );
 317
 318     // return the new image with size width*height
 319     wxImage Scale( int width, int height,
 320                    wxImageResizeQuality quality = wxIMAGE_QUALITY_NORMAL ) const;
 321
 322     // box averager and bicubic filters for up/down sampling
 323     wxImage ResampleNearest(int width, int height) const;
 324     wxImage ResampleBox(int width, int height) const;
 325     wxImage ResampleBilinear(int width, int height) const;
 326     wxImage ResampleBicubic(int width, int height) const;
 327
 328     // blur the image according to the specified pixel radius
 329     wxImage Blur(int radius) const;
 330     wxImage BlurHorizontal(int radius) const;
 331     wxImage BlurVertical(int radius) const;
 332
 333     wxImage ShrinkBy( int xFactor , int yFactor ) const ;
 334
 335     // rescales the image in place
 336     wxImage& Rescale( int width, int height,
 337                       wxImageResizeQuality quality = wxIMAGE_QUALITY_NORMAL )
 338         { return *this = Scale(width, height, quality); }
 339
 340     // resizes the image in place
 341     wxImage& Resize( const wxSize& size, const wxPoint& pos,
 342                      int r = -1, int g = -1, int b = -1 ) { return *this = Size(size, pos, r, g, b); }
 343
 344     // Rotates the image about the given point, 'angle' radians.
 345     // Returns the rotated image, leaving this image intact.
 346     wxImage Rotate(double angle, const wxPoint & centre_of_rotation,
 347                    bool interpolating = true, wxPoint * offset_after_rotation = NULL) const;
 348
 349     wxImage Rotate90( bool clockwise = true ) const;
 350     wxImage Rotate180() const;
 351     wxImage Mirror( bool horizontally = true ) const;
 352
 353     // replace one colour with another
 354     void Replace( unsigned char r1, unsigned char g1, unsigned char b1,
 355                   unsigned char r2, unsigned char g2, unsigned char b2 );
 356
 357     // Convert to greyscale image. Uses the luminance component (Y) of the image.
 358     // The luma value (YUV) is calculated using (R * weight_r) + (G * weight_g) + (B * weight_b), defaults to ITU-T BT.601
 359     wxImage ConvertToGreyscale(double weight_r, double weight_g, double weight_b) const;
 360     wxImage ConvertToGreyscale(void) const;
 361
 362     // convert to monochrome image (<r,g,b> will be replaced by white,
 363     // everything else by black)
 364     wxImage ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const;
 365
 366     // Convert to disabled (dimmed) image.
 367     wxImage ConvertToDisabled(unsigned char brightness = 255) const;
 368
 369     // these routines are slow but safe
 370     void SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b );
 371     void SetRGB( const wxRect& rect, unsigned char r, unsigned char g, unsigned char b );
 372     unsigned char GetRed( int x, int y ) const;
 373     unsigned char GetGreen( int x, int y ) const;
 374     unsigned char GetBlue( int x, int y ) const;
 375
 376     void SetAlpha(int x, int y, unsigned char alpha);
 377     unsigned char GetAlpha(int x, int y) const;
 378
 379     // find first colour that is not used in the image and has higher
 380     // RGB values than <startR,startG,startB>
 381     bool FindFirstUnusedColour( unsigned char *r, unsigned char *g, unsigned char *b,
 382                                 unsigned char startR = 1, unsigned char startG = 0,
 383                                 unsigned char startB = 0 ) const;
 384     // Set image's mask to the area of 'mask' that has <r,g,b> colour
 385     bool SetMaskFromImage(const wxImage & mask,
 386                           unsigned char mr, unsigned char mg, unsigned char mb);
 387
 388     // converts image's alpha channel to mask (choosing mask colour
 389     // automatically or using the specified colour for the mask), if it has
 390     // any, does nothing otherwise:
 391     bool ConvertAlphaToMask(unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
 392     bool ConvertAlphaToMask(unsigned char mr, unsigned char mg, unsigned char mb,
 393                             unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD);
 394
 395
 396     // This method converts an image where the original alpha
 397     // information is only available as a shades of a colour
 398     // (actually shades of grey) typically when you draw anti-
 399     // aliased text into a bitmap. The DC drawinf routines
 400     // draw grey values on the black background although they
 401     // actually mean to draw white with differnt alpha values.
 402     // This method reverses it, assuming a black (!) background
 403     // and white text (actually only the red channel is read).
 404     // The method will then fill up the whole image with the
 405     // colour given.
 406     bool ConvertColourToAlpha( unsigned char r, unsigned char g, unsigned char b );
 407
 408     static bool CanRead( const wxString& name );
 409     static int GetImageCount( const wxString& name, wxBitmapType type = wxBITMAP_TYPE_ANY );
 410     virtual bool LoadFile( const wxString& name, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 );
 411     virtual bool LoadFile( const wxString& name, const wxString& mimetype, int index = -1 );
 412
 413 #if wxUSE_STREAMS
 414     static bool CanRead( wxInputStream& stream );
 415     static int GetImageCount( wxInputStream& stream, wxBitmapType type = wxBITMAP_TYPE_ANY );
 416     virtual bool LoadFile( wxInputStream& stream, wxBitmapType type = wxBITMAP_TYPE_ANY, int index = -1 );
 417     virtual bool LoadFile( wxInputStream& stream, const wxString& mimetype, int index = -1 );
 418 #endif
 419
 420     virtual bool SaveFile( const wxString& name ) const;
 421     virtual bool SaveFile( const wxString& name, wxBitmapType type ) const;
 422     virtual bool SaveFile( const wxString& name, const wxString& mimetype ) const;
 423
 424 #if wxUSE_STREAMS
 425     virtual bool SaveFile( wxOutputStream& stream, wxBitmapType type ) const;
 426     virtual bool SaveFile( wxOutputStream& stream, const wxString& mimetype ) const;
 427 #endif
 428
 429     bool Ok() const { return IsOk(); }
 430     bool IsOk() const;
 431     int GetWidth() const;
 432     int GetHeight() const;
 433
 434     wxSize GetSize() const
 435         { return wxSize(GetWidth(), GetHeight()); }
 436
 437     // Gets the type of image found by LoadFile or specified with SaveFile
 438     wxBitmapType GetType() const;
 439
 440     // Set the image type, this is normally only called if the image is being
 441     // created from data in the given format but not using LoadFile() (e.g.
 442     // wxGIFDecoder uses this)
 443     void SetType(wxBitmapType type);
 444
 445     // these functions provide fastest access to wxImage data but should be
 446     // used carefully as no checks are done
 447     unsigned char *GetData() const;
 448     void SetData( unsigned char *data, bool static_data=false );
 449     void SetData( unsigned char *data, int new_width, int new_height, bool static_data=false );
 450
 451     unsigned char *GetAlpha() const;    // may return NULL!
 452     bool HasAlpha() const { return GetAlpha() != NULL; }
 453     void SetAlpha(unsigned char *alpha = NULL, bool static_data=false);
 454     void InitAlpha();
 455     void ClearAlpha();
 456
 457     // return true if this pixel is masked or has alpha less than specified
 458     // threshold
 459     bool IsTransparent(int x, int y,
 460                        unsigned char threshold = wxIMAGE_ALPHA_THRESHOLD) const;
 461
 462     // Mask functions
 463     void SetMaskColour( unsigned char r, unsigned char g, unsigned char b );
 464     // Get the current mask colour or find a suitable colour
 465     // returns true if using current mask colour
 466     bool GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const;
 467     unsigned char GetMaskRed() const;
 468     unsigned char GetMaskGreen() const;
 469     unsigned char GetMaskBlue() const;
 470     void SetMask( bool mask = true );
 471     bool HasMask() const;
 472
 473 #if wxUSE_PALETTE
 474     // Palette functions
 475     bool HasPalette() const;
 476     const wxPalette& GetPalette() const;
 477     void SetPalette(const wxPalette& palette);
 478 #endif // wxUSE_PALETTE
 479
 480     // Option functions (arbitrary name/value mapping)
 481     void SetOption(const wxString& name, const wxString& value);
 482     void SetOption(const wxString& name, int value);
 483     wxString GetOption(const wxString& name) const;
 484     int GetOptionInt(const wxString& name) const;
 485     bool HasOption(const wxString& name) const;
 486
 487     unsigned long CountColours( unsigned long stopafter = (unsigned long) -1 ) const;
 488
 489     // Computes the histogram of the image and fills a hash table, indexed
 490     // with integer keys built as 0xRRGGBB, containing wxImageHistogramEntry
 491     // objects. Each of them contains an 'index' (useful to build a palette
 492     // with the image colours) and a 'value', which is the number of pixels
 493     // in the image with that colour.
 494     // Returned value: # of entries in the histogram
 495     unsigned long ComputeHistogram( wxImageHistogram &h ) const;
 496
 497     // Rotates the hue of each pixel of the image. angle is a double in the range
 498     // -1.0..1.0 where -1.0 is -360 degrees and 1.0 is 360 degrees
 499     void RotateHue(double angle);
 500
 501     static wxList& GetHandlers() { return sm_handlers; }
 502     static void AddHandler( wxImageHandler *handler );
 503     static void InsertHandler( wxImageHandler *handler );
 504     static bool RemoveHandler( const wxString& name );
 505     static wxImageHandler *FindHandler( const wxString& name );
 506     static wxImageHandler *FindHandler( const wxString& extension, wxBitmapType imageType );
 507     static wxImageHandler *FindHandler( wxBitmapType imageType );
 508
 509     static wxImageHandler *FindHandlerMime( const wxString& mimetype );
 510
 511     static wxString GetImageExtWildcard();
 512
 513     static void CleanUpHandlers();
 514     static void InitStandardHandlers();
 515
 516     static HSVValue RGBtoHSV(const RGBValue& rgb);
 517     static RGBValue HSVtoRGB(const HSVValue& hsv);
 518
 519 #if WXWIN_COMPATIBILITY_2_8
 520     wxDEPRECATED_CONSTRUCTOR(
 521         wxImage(const wxString& name, long type, int index = -1)
 522         {
 523             LoadFile(name, (wxBitmapType)type, index);
 524         }
 525     )
 526
 527 #if wxUSE_STREAMS
 528     wxDEPRECATED_CONSTRUCTOR(
 529         wxImage(wxInputStream& stream, long type, int index = -1)
 530         {
 531             LoadFile(stream, (wxBitmapType)type, index);
 532         }
 533     )
 534
 535     wxDEPRECATED(
 536         bool LoadFile(wxInputStream& stream, long type, int index = -1)
 537         {
 538             return LoadFile(stream, (wxBitmapType)type, index);
 539         }
 540     )
 541
 542     wxDEPRECATED(
 543         bool SaveFile(wxOutputStream& stream, long type) const
 544         {
 545             return SaveFile(stream, (wxBitmapType)type);
 546         }
 547     )
 548 #endif // wxUSE_STREAMS
 549
 550     wxDEPRECATED(
 551         bool LoadFile(const wxString& name, long type, int index = -1)
 552         {
 553             return LoadFile(name, (wxBitmapType)type, index);
 554         }
 555     )
 556
 557     wxDEPRECATED(
 558         bool SaveFile(const wxString& name, long type) const
 559         {
 560             return SaveFile(name, (wxBitmapType)type);
 561         }
 562     )
 563
 564     wxDEPRECATED(
 565         static wxImageHandler *FindHandler(const wxString& ext, long type)
 566         {
 567             return FindHandler(ext, (wxBitmapType)type);
 568         }
 569     )
 570
 571     wxDEPRECATED(
 572         static wxImageHandler *FindHandler(long imageType)
 573         {
 574             return FindHandler((wxBitmapType)imageType);
 575         }
 576     )
 577 #endif // WXWIN_COMPATIBILITY_2_8
 578
 579 protected:
 580     static wxList   sm_handlers;
 581
 582     // return the index of the point with the given coordinates or -1 if the
 583     // image is invalid of the coordinates are out of range
 584     //
 585     // note that index must be multiplied by 3 when using it with RGB array
 586     long XYToIndex(int x, int y) const;
 587
 588     virtual wxObjectRefData* CreateRefData() const;
 589     virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
 590
 591 private:
 592     friend class WXDLLIMPEXP_FWD_CORE wxImageHandler;
 593
 594     // Possible values for MakeEmptyClone() flags.
 595     enum
 596     {
 597         // Create an image with the same orientation as this one. This is the
 598         // default and only exists for symmetry with SwapOrientation.
 599         Clone_SameOrientation = 0,
 600
 601         // Create an image with the same height as this image width and the
 602         // same width as this image height.
 603         Clone_SwapOrientation = 1
 604     };
 605
 606     // Returns a new blank image with the same dimensions (or with width and
 607     // height swapped if Clone_SwapOrientation flag is given), alpha, and mask
 608     // as this image itself. This is used by several functions creating
 609     // modified versions of this image.
 610     wxImage MakeEmptyClone(int flags = Clone_SameOrientation) const;
 611
 612 #if wxUSE_STREAMS
 613     // read the image from the specified stream updating image type if
 614     // successful
 615     bool DoLoad(wxImageHandler& handler, wxInputStream& stream, int index);
 616
 617     // write the image to the specified stream and also update the image type
 618     // if successful
 619     bool DoSave(wxImageHandler& handler, wxOutputStream& stream) const;
 620 #endif // wxUSE_STREAMS
 621
 622     DECLARE_DYNAMIC_CLASS(wxImage)
 623 };
 624
 625
 626 extern void WXDLLIMPEXP_CORE wxInitAllImageHandlers();
 627
 628 extern WXDLLIMPEXP_DATA_CORE(wxImage)    wxNullImage;
 629
 630 //-----------------------------------------------------------------------------
 631 // wxImage handlers
 632 //-----------------------------------------------------------------------------
 633
 634 #include "wx/imagbmp.h"
 635 #include "wx/imagpng.h"
 636 #include "wx/imaggif.h"
 637 #include "wx/imagpcx.h"
 638 #include "wx/imagjpeg.h"
 639 #include "wx/imagtga.h"
 640 #include "wx/imagtiff.h"
 641 #include "wx/imagpnm.h"
 642 #include "wx/imagxpm.h"
 643 #include "wx/imagiff.h"
 644
 645 #endif // wxUSE_IMAGE
 646
 647 #endif
 648   // _WX_IMAGE_H_