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_pcx;
  52     wxBitmap  *my_horse_pnm;
  53     wxBitmap  *my_horse_tiff;
  54     wxBitmap  *my_horse_xpm;
  55
  56     wxBitmap  *my_smile_xbm;
  57     wxBitmap  *my_square;
  58     wxBitmap  *my_anti;
  59
  60 protected:
  61     wxBitmap m_bmpSmileXpm;
  62     wxIcon   m_iconSmileXpm;
  63
  64 private:
  65     DECLARE_DYNAMIC_CLASS(MyCanvas)
  66     DECLARE_EVENT_TABLE()
  67 };
  68
  69
  70 const int nChoices = 8 ;
  71 static const wxString bppchoices[nChoices] =
  72 {
  73     "1 bpp color",
  74     "1 bpp B&W",
  75     "4 bpp color",
  76     "8 bpp color",
  77     "8 bpp greyscale",
  78     "8 bpp red",
  79     "8 bpp own palette",
  80     "24 bpp"
  81 };
  82
  83 static const int bppvalues[nChoices] =
  84 {
  85     wxBMP_1BPP,
  86     wxBMP_1BPP_BW,
  87     wxBMP_4BPP,
  88     wxBMP_8BPP,
  89     wxBMP_8BPP_GREY,
  90     wxBMP_8BPP_RED,
  91     wxBMP_8BPP_PALETTE,
  92     wxBMP_24BPP
  93 };
  94
  95 // MyFrame
  96
  97
  98 class MyFrame: public wxFrame
  99 {
 100 public:
 101     MyFrame();
 102
 103     void OnAbout( wxCommandEvent &event );
 104     void OnNewFrame( wxCommandEvent &event );
 105     void OnQuit( wxCommandEvent &event );
 106
 107     MyCanvas         *m_canvas;
 108
 109 private:
 110     DECLARE_DYNAMIC_CLASS(MyFrame)
 111     DECLARE_EVENT_TABLE()
 112 };
 113
 114 class MyImageFrame : public wxFrame
 115 {
 116 public:
 117     MyImageFrame(wxFrame *parent, const wxBitmap& bitmap)
 118         : wxFrame(parent, -1, _T("Double click to save"),
 119                   wxDefaultPosition, wxDefaultSize,
 120                   wxCAPTION | wxSYSTEM_MENU),
 121                   m_bitmap(bitmap)
 122     {
 123         SetClientSize(bitmap.GetWidth(), bitmap.GetHeight());
 124     }
 125
 126     void OnPaint(wxPaintEvent& WXUNUSED(event))
 127     {
 128         wxPaintDC dc( this );
 129         dc.DrawBitmap( m_bitmap, 0, 0 );
 130     }
 131
 132     void OnSave(wxCommandEvent& WXUNUSED(event))
 133     {
 134         wxImage image(m_bitmap);
 135
 136         int bppselection = wxGetSingleChoiceIndex("Set BMP BPP",
 137                                                   "Set BMP BPP",
 138                                                   nChoices,
 139                                                   bppchoices,
 140                                                   this);
 141         if ( bppselection == -1 )
 142         {
 143             // cancelled
 144             return;
 145         }
 146
 147         image.SetOption(wxBMP_FORMAT, bppvalues[bppselection]);
 148
 149         wxString deffilename = bppchoices[bppselection];
 150         deffilename.Replace(wxT(" "), wxT("_"));
 151         deffilename += wxT(".bmp");
 152         wxString savefilename = wxFileSelector( wxT("Save Image"),
 153                                                 wxT(""),
 154                                                 deffilename,
 155                                                 (const wxChar *)NULL,
 156                                             wxT("BMP files (*.bmp)|*.bmp|")
 157                                             wxT("PNG files (*.png)|*.png|")
 158                                             wxT("JPEG files (*.jpg)|*.jpg|")
 159                                             wxT("GIF files (*.gif)|*.gif|")
 160                                             wxT("TIFF files (*.tif)|*.tif|")
 161                                             wxT("PCX files (*.pcx)|*.pcx"),
 162                                                 wxSAVE);
 163
 164         if ( savefilename.empty() )
 165             return;
 166
 167         if ( image.GetOptionInt(wxBMP_FORMAT) == wxBMP_8BPP_PALETTE )
 168         {
 169             unsigned char *cmap = new unsigned char [256];
 170             for ( int i = 0; i < 256; i++ )
 171                 cmap[i] = i;
 172             image.SetPalette(wxPalette(256, cmap, cmap, cmap));
 173
 174             delete cmap;
 175         }
 176
 177         bool saved = FALSE;
 178
 179         wxString extension = savefilename.AfterLast('.').Lower();
 180
 181         if (extension == "bmp")
 182             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_BMP);
 183         else if (extension == "png")
 184             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PNG);
 185         else if (extension == "pcx")
 186             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PCX);
 187         else if ((extension == "tif") || (extension == "tiff"))
 188             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_TIF);
 189         else if (extension == "jpg")
 190             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_JPEG);
 191         else if (extension == "pnm")
 192             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PNM);
 193         else
 194             wxMessageBox("Unknown file type, see options in file selector.",
 195                          "Unknown file type",
 196                          wxOK|wxCENTRE, this);
 197     }
 198
 199 private:
 200     wxBitmap m_bitmap;
 201
 202     DECLARE_EVENT_TABLE()
 203 };
 204
 205 // MyApp
 206
 207 class MyApp: public wxApp
 208 {
 209 public:
 210     virtual bool OnInit();
 211 };
 212
 213 // main program
 214
 215 IMPLEMENT_APP(MyApp)
 216
 217 // MyCanvas
 218
 219 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
 220
 221 BEGIN_EVENT_TABLE(MyImageFrame, wxFrame)
 222   EVT_PAINT(MyImageFrame::OnPaint)
 223   EVT_LEFT_DCLICK(MyImageFrame::OnSave)
 224 END_EVENT_TABLE()
 225
 226 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 227   EVT_PAINT(MyCanvas::OnPaint)
 228 END_EVENT_TABLE()
 229
 230 MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
 231                     const wxPoint &pos, const wxSize &size )
 232         : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
 233 #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
 234           , m_bmpSmileXpm((const char **) smile_xpm)
 235           , m_iconSmileXpm((const char **) smile_xpm)
 236 #endif
 237 {
 238     my_horse_png = (wxBitmap*) NULL;
 239     my_horse_jpeg = (wxBitmap*) NULL;
 240     my_horse_gif = (wxBitmap*) NULL;
 241     my_horse_bmp = (wxBitmap*) NULL;
 242     my_horse_pcx = (wxBitmap*) NULL;
 243     my_horse_pnm = (wxBitmap*) NULL;
 244     my_horse_tiff = (wxBitmap*) NULL;
 245     my_horse_xpm = (wxBitmap*) NULL;
 246     my_smile_xbm = (wxBitmap*) NULL;
 247     my_square = (wxBitmap*) NULL;
 248     my_anti = (wxBitmap*) NULL;
 249
 250     SetBackgroundColour(* wxWHITE);
 251
 252     wxBitmap bitmap( 100, 100 );
 253
 254     wxMemoryDC dc;
 255     dc.SelectObject( bitmap );
 256     dc.SetBrush( wxBrush( wxT("orange"), wxSOLID ) );
 257     dc.SetPen( *wxBLACK_PEN );
 258     dc.DrawRectangle( 0, 0, 100, 100 );
 259     dc.SetBrush( *wxWHITE_BRUSH );
 260     dc.DrawRectangle( 20, 20, 60, 60 );
 261     dc.SelectObject( wxNullBitmap );
 262
 263     // try to find the directory with our images
 264     wxString dir;
 265     if ( wxFile::Exists(wxT("./horse.png")) )
 266         dir = "./";
 267     else if ( wxFile::Exists(wxT("../horse.png")) )
 268         dir = "../";
 269     else
 270         wxLogWarning(wxT("Can't find image files in either '.' or '..'!"));
 271
 272     wxImage image = bitmap.ConvertToImage();
 273
 274 #if wxUSE_LIBPNG
 275     if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG ))
 276         wxLogError(wxT("Can't save file"));
 277
 278     image.Destroy();
 279
 280     image.LoadFile( dir + wxString("test.png") );
 281     my_square = new wxBitmap( image );
 282
 283     image.Destroy();
 284
 285     if ( !image.LoadFile( dir + wxString("horse.png")) )
 286         wxLogError(wxT("Can't load PNG image"));
 287     else
 288         my_horse_png = new wxBitmap( image );
 289 #endif // wxUSE_LIBPNG
 290
 291 #if wxUSE_LIBJPEG
 292     image.Destroy();
 293
 294     if ( !image.LoadFile( dir + wxString("horse.jpg")) )
 295         wxLogError(wxT("Can't load JPG image"));
 296     else
 297         my_horse_jpeg = new wxBitmap( image );
 298 #endif // wxUSE_LIBJPEG
 299
 300 #if wxUSE_GIF
 301     image.Destroy();
 302
 303     if ( !image.LoadFile( dir + wxString("horse.gif")) )
 304         wxLogError(wxT("Can't load GIF image"));
 305     else
 306         my_horse_gif = new wxBitmap( image );
 307 #endif
 308
 309 #if wxUSE_PCX
 310     image.Destroy();
 311
 312     if ( !image.LoadFile( dir + wxString("horse.pcx"), wxBITMAP_TYPE_PCX ) )
 313         wxLogError(wxT("Can't load PCX image"));
 314     else
 315         my_horse_pcx = new wxBitmap( image );
 316 #endif
 317
 318     image.Destroy();
 319
 320     if ( !image.LoadFile( dir + wxString("horse.bmp"), wxBITMAP_TYPE_BMP ) )
 321         wxLogError(wxT("Can't load BMP image"));
 322     else
 323         my_horse_bmp = new wxBitmap( image );
 324
 325 #if wxUSE_XPM
 326     image.Destroy();
 327
 328     if ( !image.LoadFile( dir + wxString("horse.xpm"), wxBITMAP_TYPE_XPM ) )
 329         wxLogError(wxT("Can't load XPM image"));
 330     else
 331         my_horse_xpm = new wxBitmap( image );
 332
 333     if ( !image.SaveFile( dir + wxString("test.xpm"), wxBITMAP_TYPE_XPM ))
 334         wxLogError(wxT("Can't save file"));
 335 #endif
 336
 337 #if wxUSE_PNM
 338     image.Destroy();
 339
 340     if ( !image.LoadFile( dir + wxString("horse.pnm"), wxBITMAP_TYPE_PNM ) )
 341         wxLogError(wxT("Can't load PNM image"));
 342     else
 343         my_horse_pnm = new wxBitmap( image );
 344 #endif
 345
 346 #if wxUSE_LIBTIFF
 347     image.Destroy();
 348
 349     if ( !image.LoadFile( dir + wxString("horse.tif"), wxBITMAP_TYPE_TIF ) )
 350         wxLogError(wxT("Can't load TIFF image"));
 351     else
 352         my_horse_tiff = new wxBitmap( image );
 353 #endif
 354
 355     CreateAntiAliasedBitmap();
 356
 357     my_smile_xbm = new wxBitmap( (const char*)smile_bits, smile_width,
 358                                  smile_height, 1 );
 359
 360 #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
 361     // demonstrates XPM automatically using the mask when saving
 362     if ( m_bmpSmileXpm.Ok() )
 363         m_bmpSmileXpm.SaveFile("saved.xpm", wxBITMAP_TYPE_XPM);
 364 #endif
 365 }
 366
 367 MyCanvas::~MyCanvas()
 368 {
 369     delete my_horse_pnm;
 370     delete my_horse_png;
 371     delete my_horse_jpeg;
 372     delete my_horse_gif;
 373     delete my_horse_bmp;
 374     delete my_horse_pcx;
 375     delete my_horse_tiff;
 376     delete my_horse_xpm;
 377     delete my_smile_xbm;
 378     delete my_square;
 379     delete my_anti;
 380 }
 381
 382 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 383 {
 384     wxPaintDC dc( this );
 385     PrepareDC( dc );
 386
 387     dc.DrawText( "Loaded image", 30, 10 );
 388     if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
 389
 390     dc.DrawText( "Drawn directly", 150, 10 );
 391     dc.SetBrush( wxBrush( wxT("orange"), wxSOLID ) );
 392     dc.SetPen( *wxBLACK_PEN );
 393     dc.DrawRectangle( 150, 30, 100, 100 );
 394     dc.SetBrush( *wxWHITE_BRUSH );
 395     dc.DrawRectangle( 170, 50, 60, 60 );
 396
 397     if (my_anti && my_anti->Ok())
 398         dc.DrawBitmap( *my_anti, 280, 30 );
 399
 400     dc.DrawText( "PNG handler", 30, 135 );
 401     if (my_horse_png && my_horse_png->Ok())
 402     {
 403         dc.DrawBitmap( *my_horse_png, 30, 150 );
 404         wxRect rect(0,0,100,100);
 405         wxBitmap sub( my_horse_png->GetSubBitmap(rect) );
 406         dc.DrawText( "GetSubBitmap()", 280, 190 );
 407         dc.DrawBitmap( sub, 280, 210 );
 408     }
 409
 410     dc.DrawText( "JPEG handler", 30, 365 );
 411     if (my_horse_jpeg && my_horse_jpeg->Ok())
 412         dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
 413
 414     dc.DrawText( "GIF handler", 30, 595 );
 415     if (my_horse_gif && my_horse_gif->Ok())
 416         dc.DrawBitmap( *my_horse_gif, 30, 610 );
 417
 418     dc.DrawText( "PCX handler", 30, 825 );
 419     if (my_horse_pcx && my_horse_pcx->Ok())
 420         dc.DrawBitmap( *my_horse_pcx, 30, 840 );
 421
 422     dc.DrawText( "BMP handler", 30, 1055 );
 423     if (my_horse_bmp && my_horse_bmp->Ok())
 424         dc.DrawBitmap( *my_horse_bmp, 30, 1070 );
 425
 426     dc.DrawText( "PNM handler", 30, 1285 );
 427     if (my_horse_pnm && my_horse_pnm->Ok())
 428         dc.DrawBitmap( *my_horse_pnm, 30, 1300 );
 429
 430     dc.DrawText( "TIFF handler", 30, 1515 );
 431     if (my_horse_tiff && my_horse_tiff->Ok())
 432         dc.DrawBitmap( *my_horse_tiff, 30, 1530 );
 433
 434     dc.DrawText( "XPM handler", 30, 1745 );
 435     if (my_horse_xpm && my_horse_xpm->Ok())
 436         dc.DrawBitmap( *my_horse_xpm, 30, 1760 );
 437
 438     if (my_smile_xbm && my_smile_xbm->Ok())
 439     {
 440         dc.DrawText( "XBM bitmap", 30, 1975 );
 441         dc.DrawText( "(green on red)", 30, 1990 );
 442         dc.SetTextForeground( wxT("GREEN") );
 443         dc.SetTextBackground( wxT("RED") );
 444         dc.DrawBitmap( *my_smile_xbm, 30, 2010 );
 445
 446         dc.SetTextForeground( wxT("BLACK") );
 447         dc.DrawText( "After wxImage conversion", 150, 1975 );
 448         dc.DrawText( "(red on white)", 150, 1990 );
 449         dc.SetTextForeground( wxT("RED") );
 450         wxImage i = my_smile_xbm->ConvertToImage();
 451         i.SetMaskColour( 255, 255, 255 );
 452         i.Replace( 0, 0, 0,
 453                wxRED_PEN->GetColour().Red(),
 454                wxRED_PEN->GetColour().Green(),
 455                wxRED_PEN->GetColour().Blue() );
 456         dc.DrawBitmap( i.ConvertToBitmap(), 150, 2010, TRUE );
 457         dc.SetTextForeground( wxT("BLACK") );
 458     }
 459
 460
 461     wxBitmap mono( 60,50,1 );
 462     wxMemoryDC memdc;
 463     memdc.SelectObject( mono );
 464     memdc.SetPen( *wxBLACK_PEN );
 465     memdc.SetBrush( *wxWHITE_BRUSH );
 466     memdc.DrawRectangle( 0,0,60,50 );
 467     memdc.SetTextForeground( *wxBLACK );
 468     memdc.DrawText( "Hi!", 5, 5 );
 469     memdc.SetBrush( *wxBLACK_BRUSH );
 470     memdc.DrawRectangle( 33,5,20,20 );
 471     memdc.SetPen( *wxRED_PEN );
 472     memdc.DrawLine( 5, 42, 50, 42 );
 473     memdc.SelectObject( wxNullBitmap );
 474
 475     if (mono.Ok())
 476     {
 477         dc.DrawText( "Mono bitmap", 30, 2095 );
 478         dc.DrawText( "(red on green)", 30, 2110 );
 479         dc.SetTextForeground( wxT("RED") );
 480         dc.SetTextBackground( wxT("GREEN") );
 481         dc.DrawBitmap( mono, 30, 2130 );
 482
 483         dc.SetTextForeground( wxT("BLACK") );
 484         dc.DrawText( "After wxImage conversion", 150, 2095 );
 485         dc.DrawText( "(red on white)", 150, 2110 );
 486         dc.SetTextForeground( wxT("RED") );
 487         wxImage i = mono.ConvertToImage();
 488         i.SetMaskColour( 255,255,255 );
 489         i.Replace( 0,0,0,
 490                wxRED_PEN->GetColour().Red(),
 491                wxRED_PEN->GetColour().Green(),
 492                wxRED_PEN->GetColour().Blue() );
 493         dc.DrawBitmap( i.ConvertToBitmap(), 150, 2130, TRUE );
 494         dc.SetTextForeground( wxT("BLACK") );
 495     }
 496
 497     dc.DrawText("XPM bitmap", 30, 2230);
 498     if ( m_bmpSmileXpm.Ok() )
 499     {
 500         dc.DrawBitmap(m_bmpSmileXpm, 30, 2250, TRUE);
 501     }
 502
 503     dc.DrawText("XPM icon", 150, 2230);
 504     if ( m_iconSmileXpm.Ok() )
 505     {
 506         dc.DrawIcon(m_iconSmileXpm, 150, 2250);
 507     }
 508 }
 509
 510 void MyCanvas::CreateAntiAliasedBitmap()
 511 {
 512   wxBitmap bitmap( 300, 300 );
 513
 514   wxMemoryDC dc;
 515
 516   dc.SelectObject( bitmap );
 517
 518   dc.Clear();
 519
 520   dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) );
 521   dc.SetTextForeground( wxT("RED") );
 522   dc.DrawText( "This is anti-aliased Text.", 20, 20 );
 523   dc.DrawText( "And a Rectangle.", 20, 60 );
 524
 525   dc.SetBrush( *wxRED_BRUSH );
 526   dc.SetPen( *wxTRANSPARENT_PEN );
 527   dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
 528
 529   wxImage original= bitmap.ConvertToImage();
 530   wxImage anti( 150, 150 );
 531
 532   /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
 533
 534   for (int y = 1; y < 149; y++)
 535     for (int x = 1; x < 149; x++)
 536     {
 537        int red = original.GetRed( x*2, y*2 ) +
 538                  original.GetRed( x*2-1, y*2 ) +
 539                  original.GetRed( x*2, y*2+1 ) +
 540                  original.GetRed( x*2+1, y*2+1 );
 541        red = red/4;
 542
 543        int green = original.GetGreen( x*2, y*2 ) +
 544                    original.GetGreen( x*2-1, y*2 ) +
 545                    original.GetGreen( x*2, y*2+1 ) +
 546                    original.GetGreen( x*2+1, y*2+1 );
 547        green = green/4;
 548
 549        int blue = original.GetBlue( x*2, y*2 ) +
 550                   original.GetBlue( x*2-1, y*2 ) +
 551                   original.GetBlue( x*2, y*2+1 ) +
 552                   original.GetBlue( x*2+1, y*2+1 );
 553        blue = blue/4;
 554        anti.SetRGB( x, y, red, green, blue );
 555     }
 556   my_anti = new wxBitmap( anti.ConvertToBitmap() );
 557 }
 558
 559 // MyFrame
 560
 561 const int ID_QUIT  = 108;
 562 const int ID_ABOUT = 109;
 563 const int ID_NEW = 110;
 564
 565 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 566
 567 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 568   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 569   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 570   EVT_MENU    (ID_NEW,  MyFrame::OnNewFrame)
 571 END_EVENT_TABLE()
 572
 573 MyFrame::MyFrame()
 574        : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
 575                   wxPoint(20,20), wxSize(470,360) )
 576 {
 577   wxMenu *file_menu = new wxMenu();
 578   file_menu->Append( ID_NEW, "&Show image...");
 579   file_menu->AppendSeparator();
 580   file_menu->Append( ID_ABOUT, "&About...");
 581   file_menu->AppendSeparator();
 582   file_menu->Append( ID_QUIT, "E&xit");
 583
 584   wxMenuBar *menu_bar = new wxMenuBar();
 585   menu_bar->Append(file_menu, "&File");
 586
 587   SetMenuBar( menu_bar );
 588
 589   CreateStatusBar(2);
 590   int widths[] = { -1, 100 };
 591   SetStatusWidths( 2, widths );
 592
 593   m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
 594
 595   // 500 width * 2100 height
 596   m_canvas->SetScrollbars( 10, 10, 50, 220 );
 597 }
 598
 599 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 600 {
 601   Close( TRUE );
 602 }
 603
 604 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 605 {
 606   (void)wxMessageBox( "wxImage demo\n"
 607                       "Robert Roebling (c) 1998,2000",
 608                       "About wxImage Demo", wxICON_INFORMATION | wxOK );
 609 }
 610
 611 void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) )
 612 {
 613     wxString filename = wxFileSelector(_T("Select image file"));
 614     if ( !filename )
 615         return;
 616
 617     wxImage image;
 618     if ( !image.LoadFile(filename) )
 619     {
 620         wxLogError(_T("Couldn't load image from '%s'."), filename.c_str());
 621
 622         return;
 623     }
 624
 625     (new MyImageFrame(this, image.ConvertToBitmap()))->Show();
 626 }
 627
 628 //-----------------------------------------------------------------------------
 629 // MyApp
 630 //-----------------------------------------------------------------------------
 631
 632 bool MyApp::OnInit()
 633 {
 634 #if wxUSE_LIBPNG
 635   wxImage::AddHandler( new wxPNGHandler );
 636 #endif
 637
 638 #if wxUSE_LIBJPEG
 639   wxImage::AddHandler( new wxJPEGHandler );
 640 #endif
 641
 642 #if wxUSE_LIBTIFF
 643   wxImage::AddHandler( new wxTIFFHandler );
 644 #endif
 645
 646 #if wxUSE_GIF
 647   wxImage::AddHandler( new wxGIFHandler );
 648 #endif
 649
 650 #if wxUSE_PCX
 651   wxImage::AddHandler( new wxPCXHandler );
 652 #endif
 653
 654 #if wxUSE_PNM
 655   wxImage::AddHandler( new wxPNMHandler );
 656 #endif
 657
 658 #if wxUSE_XPM
 659   wxImage::AddHandler( new wxXPMHandler );
 660 #endif
 661
 662   wxFrame *frame = new MyFrame();
 663   frame->Show( TRUE );
 664
 665   return TRUE;
 666 }
 667