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