samples/image/image.cpp

   1 /*
   2  * Program: image
   3  *
   4  * Author: Robert Roebling
   5  *
   6  * Copyright: (C) 1998, Robert Roebling
   7  *
   8  */
   9
  10 // For compilers that support precompilation, includes "wx/wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #ifdef __BORLANDC__
  14 #pragma hdrstop
  15 #endif
  16
  17 #ifndef WX_PRECOMP
  18 #include "wx/wx.h"
  19 #endif
  20
  21 #include "wx/image.h"
  22 #include "wx/file.h"
  23 #include "wx/mstream.h"
  24 #include "wx/wfstream.h"
  25 #include "wx/quantize.h"
  26
  27 #include "smile.xbm"
  28 #include "smile.xpm"
  29
  30
  31 // derived classes
  32
  33 class MyFrame;
  34 class MyApp;
  35
  36 // MyCanvas
  37
  38 class MyCanvas: public wxScrolledWindow
  39 {
  40 public:
  41     MyCanvas() {}
  42     MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
  43     ~MyCanvas();
  44     void OnPaint( wxPaintEvent &event );
  45     void CreateAntiAliasedBitmap();
  46
  47     wxBitmap  *my_horse_png;
  48     wxBitmap  *my_horse_jpeg;
  49     wxBitmap  *my_horse_gif;
  50     wxBitmap  *my_horse_bmp;
  51     wxBitmap  *my_horse_bmp2;
  52     wxBitmap  *my_horse_pcx;
  53     wxBitmap  *my_horse_pnm;
  54     wxBitmap  *my_horse_tiff;
  55     wxBitmap  *my_horse_xpm;
  56     wxBitmap  *my_horse_ico32;
  57     wxBitmap  *my_horse_ico16;
  58     wxBitmap  *my_horse_ico;
  59     wxBitmap  *my_horse_cur;
  60
  61     wxBitmap  *my_smile_xbm;
  62     wxBitmap  *my_square;
  63     wxBitmap  *my_anti;
  64
  65     int xH, yH ;
  66
  67 protected:
  68     wxBitmap m_bmpSmileXpm;
  69     wxIcon   m_iconSmileXpm;
  70
  71 private:
  72     DECLARE_DYNAMIC_CLASS(MyCanvas)
  73     DECLARE_EVENT_TABLE()
  74 };
  75
  76
  77 const int nChoices = 8 ;
  78 static const wxString bppchoices[nChoices] =
  79 {
  80     _T("1 bpp color"),
  81     _T("1 bpp B&W"),
  82     _T("4 bpp color"),
  83     _T("8 bpp color"),
  84     _T("8 bpp greyscale"),
  85     _T("8 bpp red"),
  86     _T("8 bpp own palette"),
  87     _T("24 bpp")
  88 };
  89
  90 static const int bppvalues[nChoices] =
  91 {
  92     wxBMP_1BPP,
  93     wxBMP_1BPP_BW,
  94     wxBMP_4BPP,
  95     wxBMP_8BPP,
  96     wxBMP_8BPP_GREY,
  97     wxBMP_8BPP_RED,
  98     wxBMP_8BPP_PALETTE,
  99     wxBMP_24BPP
 100 };
 101
 102 // MyFrame
 103
 104
 105 class MyFrame: public wxFrame
 106 {
 107 public:
 108     MyFrame();
 109
 110     void OnAbout( wxCommandEvent &event );
 111     void OnNewFrame( wxCommandEvent &event );
 112     void OnQuit( wxCommandEvent &event );
 113
 114     MyCanvas         *m_canvas;
 115
 116 private:
 117     DECLARE_DYNAMIC_CLASS(MyFrame)
 118     DECLARE_EVENT_TABLE()
 119 };
 120
 121 class MyImageFrame : public wxFrame
 122 {
 123 public:
 124     MyImageFrame(wxFrame *parent, const wxBitmap& bitmap)
 125         : wxFrame(parent, -1, _T("Double click to save"),
 126                   wxDefaultPosition, wxDefaultSize,
 127                   wxCAPTION | wxSYSTEM_MENU),
 128                   m_bitmap(bitmap)
 129     {
 130         SetClientSize(bitmap.GetWidth(), bitmap.GetHeight());
 131     }
 132
 133     void OnPaint(wxPaintEvent& WXUNUSED(event))
 134     {
 135         wxPaintDC dc( this );
 136         //TRUE for masked images
 137         dc.DrawBitmap( m_bitmap, 0, 0, TRUE );
 138     }
 139
 140     void OnSave(wxCommandEvent& WXUNUSED(event))
 141     {
 142         wxImage image = m_bitmap.ConvertToImage();
 143
 144         int bppselection = wxGetSingleChoiceIndex(_T("Set BMP BPP"),
 145                                                   _T("Set BMP BPP"),
 146                                                   nChoices,
 147                                                   bppchoices,
 148                                                   this);
 149         if ( bppselection == -1 )
 150         {
 151             // cancelled
 152             return;
 153         }
 154
 155         image.SetOption(wxIMAGE_OPTION_BMP_FORMAT, bppvalues[bppselection]);
 156
 157         wxString deffilename = bppchoices[bppselection];
 158         deffilename.Replace(wxT(" "), wxT("_"));
 159         deffilename += wxT(".bmp");
 160         wxString savefilename = wxFileSelector( wxT("Save Image"),
 161                                                 wxT(""),
 162                                                 deffilename,
 163                                                 (const wxChar *)NULL,
 164                                             wxT("BMP files (*.bmp)|*.bmp|")
 165                                             wxT("PNG files (*.png)|*.png|")
 166                                             wxT("JPEG files (*.jpg)|*.jpg|")
 167                                             wxT("GIF files (*.gif)|*.gif|")
 168                                             wxT("TIFF files (*.tif)|*.tif|")
 169                                             wxT("PCX files (*.pcx)|*.pcx|")
 170                                             wxT("ICO files (*.ico)|*.ico|")
 171                                             wxT("CUR files (*.cur)|*.cur"),
 172                                                 wxSAVE);
 173
 174         if ( savefilename.empty() )
 175             return;
 176
 177         if ( image.GetOptionInt(wxIMAGE_OPTION_BMP_FORMAT) == wxBMP_8BPP_PALETTE )
 178         {
 179             unsigned char *cmap = new unsigned char [256];
 180             for ( int i = 0; i < 256; i++ )
 181                 cmap[i] = i;
 182             image.SetPalette(wxPalette(256, cmap, cmap, cmap));
 183
 184             delete cmap;
 185         }
 186
 187         bool loaded;
 188         wxString extension = savefilename.AfterLast('.').Lower();
 189
 190         if (extension == _T("cur"))
 191         {
 192             image.Rescale(32,32);
 193             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0);
 194             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 0);
 195             // This shows how you can save an image with explicitly
 196             // specified image format:
 197             loaded = image.SaveFile(savefilename, wxBITMAP_TYPE_CUR);
 198         }
 199         else
 200         {
 201             // This one guesses image format from filename extension
 202             // (it may fail if the extension is not recognized):
 203             loaded = image.SaveFile(savefilename);
 204         }
 205
 206         if ( !loaded )
 207             wxMessageBox(_T("No handler for this file type."),
 208                          _T("File was not saved"),
 209                          wxOK|wxCENTRE, this);
 210     }
 211
 212 private:
 213     wxBitmap m_bitmap;
 214
 215     DECLARE_EVENT_TABLE()
 216 };
 217
 218 // MyApp
 219
 220 class MyApp: public wxApp
 221 {
 222 public:
 223     virtual bool OnInit();
 224 };
 225
 226 // main program
 227
 228 IMPLEMENT_APP(MyApp)
 229
 230 // MyCanvas
 231
 232 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
 233
 234 BEGIN_EVENT_TABLE(MyImageFrame, wxFrame)
 235   EVT_PAINT(MyImageFrame::OnPaint)
 236   EVT_LEFT_DCLICK(MyImageFrame::OnSave)
 237 END_EVENT_TABLE()
 238
 239 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 240   EVT_PAINT(MyCanvas::OnPaint)
 241 END_EVENT_TABLE()
 242
 243 MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
 244                     const wxPoint &pos, const wxSize &size )
 245         : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
 246 #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
 247           , m_bmpSmileXpm((const char **) smile_xpm)
 248           , m_iconSmileXpm((const char **) smile_xpm)
 249 #endif
 250 {
 251     my_horse_png = (wxBitmap*) NULL;
 252     my_horse_jpeg = (wxBitmap*) NULL;
 253     my_horse_gif = (wxBitmap*) NULL;
 254     my_horse_bmp = (wxBitmap*) NULL;
 255     my_horse_bmp2 = (wxBitmap*) NULL;
 256     my_horse_pcx = (wxBitmap*) NULL;
 257     my_horse_pnm = (wxBitmap*) NULL;
 258     my_horse_tiff = (wxBitmap*) NULL;
 259     my_horse_xpm = (wxBitmap*) NULL;
 260     my_horse_ico32 = (wxBitmap*) NULL;
 261     my_horse_ico16 = (wxBitmap*) NULL;
 262     my_horse_ico = (wxBitmap*) NULL;
 263     my_horse_cur = (wxBitmap*) NULL;
 264
 265     my_smile_xbm = (wxBitmap*) NULL;
 266     my_square = (wxBitmap*) NULL;
 267     my_anti = (wxBitmap*) NULL;
 268
 269     SetBackgroundColour(* wxWHITE);
 270
 271     wxBitmap bitmap( 100, 100 );
 272
 273     wxMemoryDC dc;
 274     dc.SelectObject( bitmap );
 275     dc.SetBrush( wxBrush( wxT("orange"), wxSOLID ) );
 276     dc.SetPen( *wxBLACK_PEN );
 277     dc.DrawRectangle( 0, 0, 100, 100 );
 278     dc.SetBrush( *wxWHITE_BRUSH );
 279     dc.DrawRectangle( 20, 20, 60, 60 );
 280     dc.SelectObject( wxNullBitmap );
 281
 282     // try to find the directory with our images
 283     wxString dir;
 284     if ( wxFile::Exists(wxT("./horse.png")) )
 285         dir = "./";
 286     else if ( wxFile::Exists(wxT("../horse.png")) )
 287         dir = "../";
 288     else
 289         wxLogWarning(wxT("Can't find image files in either '.' or '..'!"));
 290
 291     wxImage image = bitmap.ConvertToImage();
 292
 293 #if wxUSE_LIBPNG
 294     if ( !image.SaveFile( dir + _T("test.png"), wxBITMAP_TYPE_PNG ))
 295         wxLogError(wxT("Can't save file"));
 296
 297     image.Destroy();
 298
 299     image.LoadFile( dir + _T("test.png") );
 300     my_square = new wxBitmap( image );
 301
 302     image.Destroy();
 303
 304     if ( !image.LoadFile( dir + _T("horse.png")) )
 305         wxLogError(wxT("Can't load PNG image"));
 306     else
 307         my_horse_png = new wxBitmap( image );
 308 #endif // wxUSE_LIBPNG
 309
 310 #if wxUSE_LIBJPEG
 311     image.Destroy();
 312
 313     if ( !image.LoadFile( dir + _T("horse.jpg")) )
 314         wxLogError(wxT("Can't load JPG image"));
 315     else
 316         my_horse_jpeg = new wxBitmap( image );
 317 #endif // wxUSE_LIBJPEG
 318
 319 #if wxUSE_GIF
 320     image.Destroy();
 321
 322     if ( !image.LoadFile( dir + wxString("horse.gif")))
 323         wxLogError(wxT("Can't load GIF image"));
 324     else
 325         my_horse_gif = new wxBitmap( image );
 326 #endif
 327
 328 #if wxUSE_PCX
 329     image.Destroy();
 330
 331     if ( !image.LoadFile( dir + _T("horse.pcx"), wxBITMAP_TYPE_PCX ) )
 332         wxLogError(wxT("Can't load PCX image"));
 333     else
 334         my_horse_pcx = new wxBitmap( image );
 335 #endif
 336
 337     image.Destroy();
 338
 339     if ( !image.LoadFile( dir + _T("horse.bmp"), wxBITMAP_TYPE_BMP ) )
 340         wxLogError(wxT("Can't load BMP image"));
 341     else
 342         my_horse_bmp = new wxBitmap( image );
 343
 344 #if wxUSE_XPM
 345     image.Destroy();
 346
 347     if ( !image.LoadFile( dir + _T("horse.xpm"), wxBITMAP_TYPE_XPM ) )
 348         wxLogError(wxT("Can't load XPM image"));
 349     else
 350         my_horse_xpm = new wxBitmap( image );
 351
 352     if ( !image.SaveFile( dir + _T("test.xpm"), wxBITMAP_TYPE_XPM ))
 353         wxLogError(wxT("Can't save file"));
 354 #endif
 355
 356 #if wxUSE_PNM
 357     image.Destroy();
 358
 359     if ( !image.LoadFile( dir + _T("horse.pnm"), wxBITMAP_TYPE_PNM ) )
 360         wxLogError(wxT("Can't load PNM image"));
 361     else
 362         my_horse_pnm = new wxBitmap( image );
 363 #endif
 364
 365 #if wxUSE_LIBTIFF
 366     image.Destroy();
 367
 368     if ( !image.LoadFile( dir + _T("horse.tif"), wxBITMAP_TYPE_TIF ) )
 369         wxLogError(wxT("Can't load TIFF image"));
 370     else
 371         my_horse_tiff = new wxBitmap( image );
 372 #endif
 373
 374     CreateAntiAliasedBitmap();
 375
 376     my_smile_xbm = new wxBitmap( (const char*)smile_bits, smile_width,
 377                                  smile_height, 1 );
 378
 379 #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
 380     // demonstrates XPM automatically using the mask when saving
 381     if ( m_bmpSmileXpm.Ok() )
 382         m_bmpSmileXpm.SaveFile(_T("saved.xpm"), wxBITMAP_TYPE_XPM);
 383 #endif
 384
 385 #if wxUSE_ICO_CUR
 386     image.Destroy();
 387
 388     if ( !image.LoadFile( dir + _T("horse.ico"), wxBITMAP_TYPE_ICO, 0 ) )
 389         wxLogError(wxT("Can't load first ICO image"));
 390     else
 391         my_horse_ico32 = new wxBitmap( image );
 392
 393     image.Destroy();
 394
 395     if ( !image.LoadFile( dir + _T("horse.ico"), wxBITMAP_TYPE_ICO, 1 ) )
 396         wxLogError(wxT("Can't load second ICO image"));
 397     else
 398         my_horse_ico16 = new wxBitmap( image );
 399
 400     image.Destroy();
 401
 402     if ( !image.LoadFile( dir + _T("horse.ico") ) )
 403         wxLogError(wxT("Can't load best ICO image"));
 404     else
 405         my_horse_ico = new wxBitmap( image );
 406
 407     image.Destroy();
 408
 409     if ( !image.LoadFile( dir + _T("horse.cur"), wxBITMAP_TYPE_CUR ) )
 410         wxLogError(wxT("Can't load best ICO image"));
 411     else
 412     {
 413         my_horse_cur = new wxBitmap( image );
 414         xH = 30 + image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X) ;
 415         yH = 2420 + image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ;
 416     }
 417 #endif
 418
 419     image.Destroy();
 420
 421     // test image loading from stream
 422     wxFile file(dir + _T("horse.bmp"));
 423     off_t len = file.Length();
 424     void *data = malloc(len);
 425     if ( file.Read(data, len) != len )
 426         wxLogError(_T("Reading bitmap file failed"));
 427     else
 428     {
 429         wxMemoryInputStream mis(data, len);
 430         if ( !image.LoadFile(mis) )
 431             wxLogError(wxT("Can't load BMP image from stream"));
 432         else
 433             my_horse_bmp2 = new wxBitmap( image );
 434     }
 435
 436     free(data);
 437 }
 438
 439 MyCanvas::~MyCanvas()
 440 {
 441     delete my_horse_pnm;
 442     delete my_horse_png;
 443     delete my_horse_jpeg;
 444     delete my_horse_gif;
 445     delete my_horse_bmp;
 446     delete my_horse_bmp2;
 447     delete my_horse_pcx;
 448     delete my_horse_tiff;
 449     delete my_horse_xpm;
 450     delete my_horse_ico32;
 451     delete my_horse_ico16;
 452     delete my_horse_ico;
 453     delete my_horse_cur;
 454     delete my_smile_xbm;
 455     delete my_square;
 456     delete my_anti;
 457 }
 458
 459 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 460 {
 461     wxPaintDC dc( this );
 462     PrepareDC( dc );
 463
 464     dc.DrawText( _T("Loaded image"), 30, 10 );
 465     if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
 466
 467     dc.DrawText( _T("Drawn directly"), 150, 10 );
 468     dc.SetBrush( wxBrush( wxT("orange"), wxSOLID ) );
 469     dc.SetPen( *wxBLACK_PEN );
 470     dc.DrawRectangle( 150, 30, 100, 100 );
 471     dc.SetBrush( *wxWHITE_BRUSH );
 472     dc.DrawRectangle( 170, 50, 60, 60 );
 473
 474     if (my_anti && my_anti->Ok())
 475         dc.DrawBitmap( *my_anti, 280, 30 );
 476
 477     dc.DrawText( _T("PNG handler"), 30, 135 );
 478     if (my_horse_png && my_horse_png->Ok())
 479     {
 480         dc.DrawBitmap( *my_horse_png, 30, 150 );
 481         wxRect rect(0,0,100,100);
 482         wxBitmap sub( my_horse_png->GetSubBitmap(rect) );
 483         dc.DrawText( _T("GetSubBitmap()"), 280, 190 );
 484         dc.DrawBitmap( sub, 280, 210 );
 485     }
 486
 487     dc.DrawText( _T("JPEG handler"), 30, 365 );
 488     if (my_horse_jpeg && my_horse_jpeg->Ok())
 489         dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
 490
 491     dc.DrawText( _T("GIF handler"), 30, 595 );
 492     if (my_horse_gif && my_horse_gif->Ok())
 493         dc.DrawBitmap( *my_horse_gif, 30, 610 );
 494
 495     dc.DrawText( _T("PCX handler"), 30, 825 );
 496     if (my_horse_pcx && my_horse_pcx->Ok())
 497         dc.DrawBitmap( *my_horse_pcx, 30, 840 );
 498
 499     dc.DrawText( _T("BMP handler"), 30, 1055 );
 500     if (my_horse_bmp && my_horse_bmp->Ok())
 501         dc.DrawBitmap( *my_horse_bmp, 30, 1070 );
 502
 503     dc.DrawText( _T("BMP read from memory"), 280, 1055 );
 504     if (my_horse_bmp2 && my_horse_bmp2->Ok())
 505         dc.DrawBitmap( *my_horse_bmp2, 280, 1070 );
 506
 507     dc.DrawText( _T("PNM handler"), 30, 1285 );
 508     if (my_horse_pnm && my_horse_pnm->Ok())
 509         dc.DrawBitmap( *my_horse_pnm, 30, 1300 );
 510
 511     dc.DrawText( _T("TIFF handler"), 30, 1515 );
 512     if (my_horse_tiff && my_horse_tiff->Ok())
 513         dc.DrawBitmap( *my_horse_tiff, 30, 1530 );
 514
 515     dc.DrawText( _T("XPM handler"), 30, 1745 );
 516     if (my_horse_xpm && my_horse_xpm->Ok())
 517         dc.DrawBitmap( *my_horse_xpm, 30, 1760 );
 518
 519
 520     if (my_smile_xbm && my_smile_xbm->Ok())
 521     {
 522         dc.DrawText( _T("XBM bitmap"), 30, 1975 );
 523         dc.DrawText( _T("(green on red)"), 30, 1990 );
 524         dc.SetTextForeground( _T("GREEN") );
 525         dc.SetTextBackground( _T("RED") );
 526         dc.DrawBitmap( *my_smile_xbm, 30, 2010 );
 527
 528         dc.SetTextForeground( wxT("BLACK") );
 529         dc.DrawText( _T("After wxImage conversion"), 150, 1975 );
 530         dc.DrawText( _T("(red on white)"), 150, 1990 );
 531         dc.SetTextForeground( wxT("RED") );
 532         wxImage i = my_smile_xbm->ConvertToImage();
 533         i.SetMaskColour( 255, 255, 255 );
 534         i.Replace( 0, 0, 0,
 535                wxRED_PEN->GetColour().Red(),
 536                wxRED_PEN->GetColour().Green(),
 537                wxRED_PEN->GetColour().Blue() );
 538         dc.DrawBitmap( wxBitmap(i), 150, 2010, TRUE );
 539         dc.SetTextForeground( wxT("BLACK") );
 540     }
 541
 542
 543     wxBitmap mono( 60,50,1 );
 544     wxMemoryDC memdc;
 545     memdc.SelectObject( mono );
 546     memdc.SetPen( *wxBLACK_PEN );
 547     memdc.SetBrush( *wxWHITE_BRUSH );
 548     memdc.DrawRectangle( 0,0,60,50 );
 549     memdc.SetTextForeground( *wxBLACK );
 550     memdc.DrawText( _T("Hi!"), 5, 5 );
 551     memdc.SetBrush( *wxBLACK_BRUSH );
 552     memdc.DrawRectangle( 33,5,20,20 );
 553     memdc.SetPen( *wxRED_PEN );
 554     memdc.DrawLine( 5, 42, 50, 42 );
 555     memdc.SelectObject( wxNullBitmap );
 556
 557     if (mono.Ok())
 558     {
 559         dc.DrawText( _T("Mono bitmap"), 30, 2095 );
 560         dc.DrawText( _T("(red on green)"), 30, 2110 );
 561         dc.SetTextForeground( wxT("RED") );
 562         dc.SetTextBackground( wxT("GREEN") );
 563         dc.DrawBitmap( mono, 30, 2130 );
 564
 565         dc.SetTextForeground( wxT("BLACK") );
 566         dc.DrawText( _T("After wxImage conversion"), 150, 2095 );
 567         dc.DrawText( _T("(red on white)"), 150, 2110 );
 568         dc.SetTextForeground( wxT("RED") );
 569         wxImage i = mono.ConvertToImage();
 570         i.SetMaskColour( 255,255,255 );
 571         i.Replace( 0,0,0,
 572                wxRED_PEN->GetColour().Red(),
 573                wxRED_PEN->GetColour().Green(),
 574                wxRED_PEN->GetColour().Blue() );
 575         dc.DrawBitmap( wxBitmap(i), 150, 2130, TRUE );
 576         dc.SetTextForeground( wxT("BLACK") );
 577     }
 578
 579     dc.DrawText(_T("XPM bitmap"), 30, 2230);
 580     if ( m_bmpSmileXpm.Ok() )
 581     {
 582         dc.DrawBitmap(m_bmpSmileXpm, 30, 2250, TRUE);
 583     }
 584
 585     dc.DrawText(_T("XPM icon"), 150, 2230);
 586     if ( m_iconSmileXpm.Ok() )
 587     {
 588         dc.DrawIcon(m_iconSmileXpm, 150, 2250);
 589     }
 590
 591     dc.DrawText( _T("ICO handler (1st image)"), 30, 2290 );
 592     if (my_horse_ico32 && my_horse_ico32->Ok())
 593         dc.DrawBitmap( *my_horse_ico32, 30, 2330, TRUE );
 594
 595     dc.DrawText( _T("ICO handler (2nd image)"), 230, 2290 );
 596     if (my_horse_ico16 && my_horse_ico16->Ok())
 597         dc.DrawBitmap( *my_horse_ico16, 230, 2330, TRUE );
 598
 599     dc.DrawText( _T("ICO handler (best image)"), 430, 2290 );
 600     if (my_horse_ico && my_horse_ico->Ok())
 601         dc.DrawBitmap( *my_horse_ico, 430, 2330, TRUE );
 602
 603     dc.DrawText( _T("CUR handler"), 30, 2390 );
 604     if (my_horse_cur && my_horse_cur->Ok())
 605     {
 606         dc.DrawBitmap( *my_horse_cur, 30, 2420, TRUE );
 607         dc.SetPen (*wxRED_PEN);
 608         dc.DrawLine (xH-10,yH,xH+10,yH);
 609         dc.DrawLine (xH,yH-10,xH,yH+10);
 610     }
 611 }
 612
 613 void MyCanvas::CreateAntiAliasedBitmap()
 614 {
 615   wxBitmap bitmap( 300, 300 );
 616
 617   wxMemoryDC dc;
 618
 619   dc.SelectObject( bitmap );
 620
 621   dc.Clear();
 622
 623   dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) );
 624   dc.SetTextForeground( wxT("RED") );
 625   dc.DrawText( _T("This is anti-aliased Text."), 20, 20 );
 626   dc.DrawText( _T("And a Rectangle."), 20, 60 );
 627
 628   dc.SetBrush( *wxRED_BRUSH );
 629   dc.SetPen( *wxTRANSPARENT_PEN );
 630   dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
 631
 632   wxImage original= bitmap.ConvertToImage();
 633   wxImage anti( 150, 150 );
 634
 635   /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
 636
 637   for (int y = 1; y < 149; y++)
 638     for (int x = 1; x < 149; x++)
 639     {
 640        int red = original.GetRed( x*2, y*2 ) +
 641                  original.GetRed( x*2-1, y*2 ) +
 642                  original.GetRed( x*2, y*2+1 ) +
 643                  original.GetRed( x*2+1, y*2+1 );
 644        red = red/4;
 645
 646        int green = original.GetGreen( x*2, y*2 ) +
 647                    original.GetGreen( x*2-1, y*2 ) +
 648                    original.GetGreen( x*2, y*2+1 ) +
 649                    original.GetGreen( x*2+1, y*2+1 );
 650        green = green/4;
 651
 652        int blue = original.GetBlue( x*2, y*2 ) +
 653                   original.GetBlue( x*2-1, y*2 ) +
 654                   original.GetBlue( x*2, y*2+1 ) +
 655                   original.GetBlue( x*2+1, y*2+1 );
 656        blue = blue/4;
 657        anti.SetRGB( x, y, red, green, blue );
 658     }
 659   my_anti = new wxBitmap(anti);
 660 }
 661
 662 // MyFrame
 663
 664 const int ID_QUIT  = 108;
 665 const int ID_ABOUT = 109;
 666 const int ID_NEW = 110;
 667
 668 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 669
 670 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 671   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 672   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 673   EVT_MENU    (ID_NEW,  MyFrame::OnNewFrame)
 674 END_EVENT_TABLE()
 675
 676 MyFrame::MyFrame()
 677        : wxFrame( (wxFrame *)NULL, -1, _T("wxImage sample"),
 678                   wxPoint(20,20), wxSize(470,360) )
 679 {
 680   wxMenu *file_menu = new wxMenu();
 681   file_menu->Append( ID_NEW, _T("&Show image..."));
 682   file_menu->AppendSeparator();
 683   file_menu->Append( ID_ABOUT, _T("&About..."));
 684   file_menu->AppendSeparator();
 685   file_menu->Append( ID_QUIT, _T("E&xit"));
 686
 687   wxMenuBar *menu_bar = new wxMenuBar();
 688   menu_bar->Append(file_menu, _T("&File"));
 689
 690   SetMenuBar( menu_bar );
 691
 692   CreateStatusBar(2);
 693   int widths[] = { -1, 100 };
 694   SetStatusWidths( 2, widths );
 695
 696   m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
 697
 698   // 500 width * 2500 height
 699   m_canvas->SetScrollbars( 10, 10, 50, 250 );
 700 }
 701
 702 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 703 {
 704   Close( TRUE );
 705 }
 706
 707 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 708 {
 709   (void)wxMessageBox( _T("wxImage demo\n")
 710                       _T("Robert Roebling (c) 1998,2000"),
 711                       _T("About wxImage Demo"), wxICON_INFORMATION | wxOK );
 712 }
 713
 714 void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) )
 715 {
 716     wxString filename = wxFileSelector(_T("Select image file"));
 717     if ( !filename )
 718         return;
 719
 720     wxImage image;
 721     if ( !image.LoadFile(filename) )
 722     {
 723         wxLogError(_T("Couldn't load image from '%s'."), filename.c_str());
 724
 725         return;
 726     }
 727
 728     (new MyImageFrame(this, wxBitmap(image)))->Show();
 729 }
 730
 731 //-----------------------------------------------------------------------------
 732 // MyApp
 733 //-----------------------------------------------------------------------------
 734
 735 bool MyApp::OnInit()
 736 {
 737 #if wxUSE_LIBPNG
 738   wxImage::AddHandler( new wxPNGHandler );
 739 #endif
 740
 741 #if wxUSE_LIBJPEG
 742   wxImage::AddHandler( new wxJPEGHandler );
 743 #endif
 744
 745 #if wxUSE_LIBTIFF
 746   wxImage::AddHandler( new wxTIFFHandler );
 747 #endif
 748
 749 #if wxUSE_GIF
 750   wxImage::AddHandler( new wxGIFHandler );
 751 #endif
 752
 753 #if wxUSE_PCX
 754   wxImage::AddHandler( new wxPCXHandler );
 755 #endif
 756
 757 #if wxUSE_PNM
 758   wxImage::AddHandler( new wxPNMHandler );
 759 #endif
 760
 761 #if wxUSE_XPM
 762   wxImage::AddHandler( new wxXPMHandler );
 763 #endif
 764
 765 #if wxUSE_ICO_CUR
 766   wxImage::AddHandler( new wxICOHandler );
 767   wxImage::AddHandler( new wxCURHandler );
 768 #endif
 769
 770   wxFrame *frame = new MyFrame();
 771   frame->Show( TRUE );
 772
 773   return TRUE;
 774 }
 775