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);
 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 saved = FALSE;
 187
 188         wxString extension = savefilename.AfterLast('.').Lower();
 189
 190         if (extension == "bmp")
 191             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_BMP);
 192         else if (extension == "png")
 193             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PNG);
 194         else if (extension == "pcx")
 195             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PCX);
 196         else if ((extension == "tif") || (extension == "tiff"))
 197             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_TIF);
 198         else if (extension == "jpg")
 199             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_JPEG);
 200         else if (extension == "pnm")
 201             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PNM);
 202         else if (extension == "ico")
 203             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_ICO);
 204         else if (extension == "cur")
 205             {
 206             image.Rescale(32,32);
 207             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0);
 208             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 0);
 209             saved=image.SaveFile(savefilename, wxBITMAP_TYPE_CUR);
 210             }
 211         else
 212             wxMessageBox("Unknown file type, see options in file selector.",
 213                          "Unknown file type",
 214                          wxOK|wxCENTRE, this);
 215     }
 216
 217 private:
 218     wxBitmap m_bitmap;
 219
 220     DECLARE_EVENT_TABLE()
 221 };
 222
 223 // MyApp
 224
 225 class MyApp: public wxApp
 226 {
 227 public:
 228     virtual bool OnInit();
 229 };
 230
 231 // main program
 232
 233 IMPLEMENT_APP(MyApp)
 234
 235 // MyCanvas
 236
 237 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
 238
 239 BEGIN_EVENT_TABLE(MyImageFrame, wxFrame)
 240   EVT_PAINT(MyImageFrame::OnPaint)
 241   EVT_LEFT_DCLICK(MyImageFrame::OnSave)
 242 END_EVENT_TABLE()
 243
 244 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
 245   EVT_PAINT(MyCanvas::OnPaint)
 246 END_EVENT_TABLE()
 247
 248 MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
 249                     const wxPoint &pos, const wxSize &size )
 250         : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
 251 #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
 252           , m_bmpSmileXpm((const char **) smile_xpm)
 253           , m_iconSmileXpm((const char **) smile_xpm)
 254 #endif
 255 {
 256     my_horse_png = (wxBitmap*) NULL;
 257     my_horse_jpeg = (wxBitmap*) NULL;
 258     my_horse_gif = (wxBitmap*) NULL;
 259     my_horse_bmp = (wxBitmap*) NULL;
 260     my_horse_pcx = (wxBitmap*) NULL;
 261     my_horse_pnm = (wxBitmap*) NULL;
 262     my_horse_tiff = (wxBitmap*) NULL;
 263     my_horse_xpm = (wxBitmap*) NULL;
 264     my_horse_ico32 = (wxBitmap*) NULL;
 265     my_horse_ico16 = (wxBitmap*) NULL;
 266     my_horse_ico = (wxBitmap*) NULL;
 267     my_horse_cur = (wxBitmap*) NULL;
 268
 269     my_smile_xbm = (wxBitmap*) NULL;
 270     my_square = (wxBitmap*) NULL;
 271     my_anti = (wxBitmap*) NULL;
 272
 273     SetBackgroundColour(* wxWHITE);
 274
 275     wxBitmap bitmap( 100, 100 );
 276
 277     wxMemoryDC dc;
 278     dc.SelectObject( bitmap );
 279     dc.SetBrush( wxBrush( wxT("orange"), wxSOLID ) );
 280     dc.SetPen( *wxBLACK_PEN );
 281     dc.DrawRectangle( 0, 0, 100, 100 );
 282     dc.SetBrush( *wxWHITE_BRUSH );
 283     dc.DrawRectangle( 20, 20, 60, 60 );
 284     dc.SelectObject( wxNullBitmap );
 285
 286     // try to find the directory with our images
 287     wxString dir;
 288     if ( wxFile::Exists(wxT("./horse.png")) )
 289         dir = "./";
 290     else if ( wxFile::Exists(wxT("../horse.png")) )
 291         dir = "../";
 292     else
 293         wxLogWarning(wxT("Can't find image files in either '.' or '..'!"));
 294
 295     wxImage image = bitmap.ConvertToImage();
 296
 297 #if wxUSE_LIBPNG
 298     if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG ))
 299         wxLogError(wxT("Can't save file"));
 300
 301     image.Destroy();
 302
 303     image.LoadFile( dir + wxString("test.png") );
 304     my_square = new wxBitmap( image );
 305
 306     image.Destroy();
 307
 308     if ( !image.LoadFile( dir + wxString("horse.png")) )
 309         wxLogError(wxT("Can't load PNG image"));
 310     else
 311         my_horse_png = new wxBitmap( image );
 312 #endif // wxUSE_LIBPNG
 313
 314 #if wxUSE_LIBJPEG
 315     image.Destroy();
 316
 317     if ( !image.LoadFile( dir + wxString("horse.jpg")) )
 318         wxLogError(wxT("Can't load JPG image"));
 319     else
 320         my_horse_jpeg = new wxBitmap( image );
 321 #endif // wxUSE_LIBJPEG
 322
 323 #if wxUSE_GIF
 324     image.Destroy();
 325
 326     if ( !image.LoadFile( dir + wxString("horse.gif")) )
 327         wxLogError(wxT("Can't load GIF image"));
 328     else
 329         my_horse_gif = new wxBitmap( image );
 330 #endif
 331
 332 #if wxUSE_PCX
 333     image.Destroy();
 334
 335     if ( !image.LoadFile( dir + wxString("horse.pcx"), wxBITMAP_TYPE_PCX ) )
 336         wxLogError(wxT("Can't load PCX image"));
 337     else
 338         my_horse_pcx = new wxBitmap( image );
 339 #endif
 340
 341     image.Destroy();
 342
 343     if ( !image.LoadFile( dir + wxString("horse.bmp"), wxBITMAP_TYPE_BMP ) )
 344         wxLogError(wxT("Can't load BMP image"));
 345     else
 346         my_horse_bmp = new wxBitmap( image );
 347
 348 #if wxUSE_XPM
 349     image.Destroy();
 350
 351     if ( !image.LoadFile( dir + wxString("horse.xpm"), wxBITMAP_TYPE_XPM ) )
 352         wxLogError(wxT("Can't load XPM image"));
 353     else
 354         my_horse_xpm = new wxBitmap( image );
 355
 356     if ( !image.SaveFile( dir + wxString("test.xpm"), wxBITMAP_TYPE_XPM ))
 357         wxLogError(wxT("Can't save file"));
 358 #endif
 359
 360 #if wxUSE_PNM
 361     image.Destroy();
 362
 363     if ( !image.LoadFile( dir + wxString("horse.pnm"), wxBITMAP_TYPE_PNM ) )
 364         wxLogError(wxT("Can't load PNM image"));
 365     else
 366         my_horse_pnm = new wxBitmap( image );
 367 #endif
 368
 369 #if wxUSE_LIBTIFF
 370     image.Destroy();
 371
 372     if ( !image.LoadFile( dir + wxString("horse.tif"), wxBITMAP_TYPE_TIF ) )
 373         wxLogError(wxT("Can't load TIFF image"));
 374     else
 375         my_horse_tiff = new wxBitmap( image );
 376 #endif
 377
 378     CreateAntiAliasedBitmap();
 379
 380     my_smile_xbm = new wxBitmap( (const char*)smile_bits, smile_width,
 381                                  smile_height, 1 );
 382
 383 #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
 384     // demonstrates XPM automatically using the mask when saving
 385     if ( m_bmpSmileXpm.Ok() )
 386         m_bmpSmileXpm.SaveFile("saved.xpm", wxBITMAP_TYPE_XPM);
 387 #endif
 388
 389 #if wxUSE_ICO_CUR
 390     image.Destroy();
 391
 392     if ( !image.LoadFile( dir + wxString("horse.ico"), wxBITMAP_TYPE_ICO, 0 ) )
 393         wxLogError(wxT("Can't load first ICO image"));
 394     else
 395         my_horse_ico32 = new wxBitmap( image );
 396
 397     image.Destroy();
 398
 399     if ( !image.LoadFile( dir + wxString("horse.ico"), wxBITMAP_TYPE_ICO, 1 ) )
 400         wxLogError(wxT("Can't load second ICO image"));
 401     else
 402         my_horse_ico16 = new wxBitmap( image );
 403
 404     image.Destroy();
 405
 406     if ( !image.LoadFile( dir + wxString("horse.ico") ) )
 407         wxLogError(wxT("Can't load best ICO image"));
 408     else
 409         my_horse_ico = new wxBitmap( image );
 410
 411     image.Destroy();
 412
 413     if ( !image.LoadFile( dir + wxString("horse.cur"), wxBITMAP_TYPE_CUR ) )
 414         wxLogError(wxT("Can't load best ICO image"));
 415     else
 416         {
 417         my_horse_cur = new wxBitmap( image );
 418         xH = 30 + image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X) ;
 419         yH = 2420 + image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ;
 420         }
 421
 422 #endif
 423
 424 }
 425
 426 MyCanvas::~MyCanvas()
 427 {
 428     delete my_horse_pnm;
 429     delete my_horse_png;
 430     delete my_horse_jpeg;
 431     delete my_horse_gif;
 432     delete my_horse_bmp;
 433     delete my_horse_pcx;
 434     delete my_horse_tiff;
 435     delete my_horse_xpm;
 436     delete my_horse_ico32;
 437     delete my_horse_ico16;
 438     delete my_horse_ico;
 439     delete my_smile_xbm;
 440     delete my_square;
 441     delete my_anti;
 442 }
 443
 444 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 445 {
 446     wxPaintDC dc( this );
 447     PrepareDC( dc );
 448
 449     dc.DrawText( "Loaded image", 30, 10 );
 450     if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
 451
 452     dc.DrawText( "Drawn directly", 150, 10 );
 453     dc.SetBrush( wxBrush( wxT("orange"), wxSOLID ) );
 454     dc.SetPen( *wxBLACK_PEN );
 455     dc.DrawRectangle( 150, 30, 100, 100 );
 456     dc.SetBrush( *wxWHITE_BRUSH );
 457     dc.DrawRectangle( 170, 50, 60, 60 );
 458
 459     if (my_anti && my_anti->Ok())
 460         dc.DrawBitmap( *my_anti, 280, 30 );
 461
 462     dc.DrawText( "PNG handler", 30, 135 );
 463     if (my_horse_png && my_horse_png->Ok())
 464     {
 465         dc.DrawBitmap( *my_horse_png, 30, 150 );
 466         wxRect rect(0,0,100,100);
 467         wxBitmap sub( my_horse_png->GetSubBitmap(rect) );
 468         dc.DrawText( "GetSubBitmap()", 280, 190 );
 469         dc.DrawBitmap( sub, 280, 210 );
 470     }
 471
 472     dc.DrawText( "JPEG handler", 30, 365 );
 473     if (my_horse_jpeg && my_horse_jpeg->Ok())
 474         dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
 475
 476     dc.DrawText( "GIF handler", 30, 595 );
 477     if (my_horse_gif && my_horse_gif->Ok())
 478         dc.DrawBitmap( *my_horse_gif, 30, 610 );
 479
 480     dc.DrawText( "PCX handler", 30, 825 );
 481     if (my_horse_pcx && my_horse_pcx->Ok())
 482         dc.DrawBitmap( *my_horse_pcx, 30, 840 );
 483
 484     dc.DrawText( "BMP handler", 30, 1055 );
 485     if (my_horse_bmp && my_horse_bmp->Ok())
 486         dc.DrawBitmap( *my_horse_bmp, 30, 1070 );
 487
 488     dc.DrawText( "PNM handler", 30, 1285 );
 489     if (my_horse_pnm && my_horse_pnm->Ok())
 490         dc.DrawBitmap( *my_horse_pnm, 30, 1300 );
 491
 492     dc.DrawText( "TIFF handler", 30, 1515 );
 493     if (my_horse_tiff && my_horse_tiff->Ok())
 494         dc.DrawBitmap( *my_horse_tiff, 30, 1530 );
 495
 496     dc.DrawText( "XPM handler", 30, 1745 );
 497     if (my_horse_xpm && my_horse_xpm->Ok())
 498         dc.DrawBitmap( *my_horse_xpm, 30, 1760 );
 499
 500
 501     if (my_smile_xbm && my_smile_xbm->Ok())
 502     {
 503         dc.DrawText( "XBM bitmap", 30, 1975 );
 504         dc.DrawText( "(green on red)", 30, 1990 );
 505         dc.SetTextForeground( wxT("GREEN") );
 506         dc.SetTextBackground( wxT("RED") );
 507         dc.DrawBitmap( *my_smile_xbm, 30, 2010 );
 508
 509         dc.SetTextForeground( wxT("BLACK") );
 510         dc.DrawText( "After wxImage conversion", 150, 1975 );
 511         dc.DrawText( "(red on white)", 150, 1990 );
 512         dc.SetTextForeground( wxT("RED") );
 513         wxImage i = my_smile_xbm->ConvertToImage();
 514         i.SetMaskColour( 255, 255, 255 );
 515         i.Replace( 0, 0, 0,
 516                wxRED_PEN->GetColour().Red(),
 517                wxRED_PEN->GetColour().Green(),
 518                wxRED_PEN->GetColour().Blue() );
 519         dc.DrawBitmap( i.ConvertToBitmap(), 150, 2010, TRUE );
 520         dc.SetTextForeground( wxT("BLACK") );
 521     }
 522
 523
 524     wxBitmap mono( 60,50,1 );
 525     wxMemoryDC memdc;
 526     memdc.SelectObject( mono );
 527     memdc.SetPen( *wxBLACK_PEN );
 528     memdc.SetBrush( *wxWHITE_BRUSH );
 529     memdc.DrawRectangle( 0,0,60,50 );
 530     memdc.SetTextForeground( *wxBLACK );
 531     memdc.DrawText( "Hi!", 5, 5 );
 532     memdc.SetBrush( *wxBLACK_BRUSH );
 533     memdc.DrawRectangle( 33,5,20,20 );
 534     memdc.SetPen( *wxRED_PEN );
 535     memdc.DrawLine( 5, 42, 50, 42 );
 536     memdc.SelectObject( wxNullBitmap );
 537
 538     if (mono.Ok())
 539     {
 540         dc.DrawText( "Mono bitmap", 30, 2095 );
 541         dc.DrawText( "(red on green)", 30, 2110 );
 542         dc.SetTextForeground( wxT("RED") );
 543         dc.SetTextBackground( wxT("GREEN") );
 544         dc.DrawBitmap( mono, 30, 2130 );
 545
 546         dc.SetTextForeground( wxT("BLACK") );
 547         dc.DrawText( "After wxImage conversion", 150, 2095 );
 548         dc.DrawText( "(red on white)", 150, 2110 );
 549         dc.SetTextForeground( wxT("RED") );
 550         wxImage i = mono.ConvertToImage();
 551         i.SetMaskColour( 255,255,255 );
 552         i.Replace( 0,0,0,
 553                wxRED_PEN->GetColour().Red(),
 554                wxRED_PEN->GetColour().Green(),
 555                wxRED_PEN->GetColour().Blue() );
 556         dc.DrawBitmap( i.ConvertToBitmap(), 150, 2130, TRUE );
 557         dc.SetTextForeground( wxT("BLACK") );
 558     }
 559
 560     dc.DrawText("XPM bitmap", 30, 2230);
 561     if ( m_bmpSmileXpm.Ok() )
 562     {
 563         dc.DrawBitmap(m_bmpSmileXpm, 30, 2250, TRUE);
 564     }
 565
 566     dc.DrawText("XPM icon", 150, 2230);
 567     if ( m_iconSmileXpm.Ok() )
 568     {
 569         dc.DrawIcon(m_iconSmileXpm, 150, 2250);
 570     }
 571
 572     dc.DrawText( "ICO handler (1st image)", 30, 2290 );
 573     if (my_horse_ico32 && my_horse_ico32->Ok())
 574         dc.DrawBitmap( *my_horse_ico32, 30, 2330, TRUE );
 575
 576     dc.DrawText( "ICO handler (2nd image)", 230, 2290 );
 577     if (my_horse_ico16 && my_horse_ico16->Ok())
 578         dc.DrawBitmap( *my_horse_ico16, 230, 2330, TRUE );
 579
 580     dc.DrawText( "ICO handler (best image)", 430, 2290 );
 581     if (my_horse_ico && my_horse_ico->Ok())
 582         dc.DrawBitmap( *my_horse_ico, 430, 2330, TRUE );
 583
 584     dc.DrawText( "CUR handler", 30, 2390 );
 585     if (my_horse_cur && my_horse_cur->Ok())
 586         {
 587         dc.DrawBitmap( *my_horse_cur, 30, 2420, TRUE );
 588         dc.SetPen (*wxRED_PEN);
 589         dc.DrawLine (xH-10,yH,xH+10,yH);
 590         dc.DrawLine (xH,yH-10,xH,yH+10);
 591         }
 592 }
 593
 594 void MyCanvas::CreateAntiAliasedBitmap()
 595 {
 596   wxBitmap bitmap( 300, 300 );
 597
 598   wxMemoryDC dc;
 599
 600   dc.SelectObject( bitmap );
 601
 602   dc.Clear();
 603
 604   dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) );
 605   dc.SetTextForeground( wxT("RED") );
 606   dc.DrawText( "This is anti-aliased Text.", 20, 20 );
 607   dc.DrawText( "And a Rectangle.", 20, 60 );
 608
 609   dc.SetBrush( *wxRED_BRUSH );
 610   dc.SetPen( *wxTRANSPARENT_PEN );
 611   dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
 612
 613   wxImage original= bitmap.ConvertToImage();
 614   wxImage anti( 150, 150 );
 615
 616   /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
 617
 618   for (int y = 1; y < 149; y++)
 619     for (int x = 1; x < 149; x++)
 620     {
 621        int red = original.GetRed( x*2, y*2 ) +
 622                  original.GetRed( x*2-1, y*2 ) +
 623                  original.GetRed( x*2, y*2+1 ) +
 624                  original.GetRed( x*2+1, y*2+1 );
 625        red = red/4;
 626
 627        int green = original.GetGreen( x*2, y*2 ) +
 628                    original.GetGreen( x*2-1, y*2 ) +
 629                    original.GetGreen( x*2, y*2+1 ) +
 630                    original.GetGreen( x*2+1, y*2+1 );
 631        green = green/4;
 632
 633        int blue = original.GetBlue( x*2, y*2 ) +
 634                   original.GetBlue( x*2-1, y*2 ) +
 635                   original.GetBlue( x*2, y*2+1 ) +
 636                   original.GetBlue( x*2+1, y*2+1 );
 637        blue = blue/4;
 638        anti.SetRGB( x, y, red, green, blue );
 639     }
 640   my_anti = new wxBitmap( anti.ConvertToBitmap() );
 641 }
 642
 643 // MyFrame
 644
 645 const int ID_QUIT  = 108;
 646 const int ID_ABOUT = 109;
 647 const int ID_NEW = 110;
 648
 649 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 650
 651 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 652   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 653   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 654   EVT_MENU    (ID_NEW,  MyFrame::OnNewFrame)
 655 END_EVENT_TABLE()
 656
 657 MyFrame::MyFrame()
 658        : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
 659                   wxPoint(20,20), wxSize(470,360) )
 660 {
 661   wxMenu *file_menu = new wxMenu();
 662   file_menu->Append( ID_NEW, "&Show image...");
 663   file_menu->AppendSeparator();
 664   file_menu->Append( ID_ABOUT, "&About...");
 665   file_menu->AppendSeparator();
 666   file_menu->Append( ID_QUIT, "E&xit");
 667
 668   wxMenuBar *menu_bar = new wxMenuBar();
 669   menu_bar->Append(file_menu, "&File");
 670
 671   SetMenuBar( menu_bar );
 672
 673   CreateStatusBar(2);
 674   int widths[] = { -1, 100 };
 675   SetStatusWidths( 2, widths );
 676
 677   m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
 678
 679   // 500 width * 2500 height
 680   m_canvas->SetScrollbars( 10, 10, 50, 250 );
 681 }
 682
 683 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 684 {
 685   Close( TRUE );
 686 }
 687
 688 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 689 {
 690   (void)wxMessageBox( "wxImage demo\n"
 691                       "Robert Roebling (c) 1998,2000",
 692                       "About wxImage Demo", wxICON_INFORMATION | wxOK );
 693 }
 694
 695 void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) )
 696 {
 697     wxString filename = wxFileSelector(_T("Select image file"));
 698     if ( !filename )
 699         return;
 700
 701     wxImage image;
 702     if ( !image.LoadFile(filename) )
 703     {
 704         wxLogError(_T("Couldn't load image from '%s'."), filename.c_str());
 705
 706         return;
 707     }
 708
 709     (new MyImageFrame(this, image.ConvertToBitmap()))->Show();
 710 }
 711
 712 //-----------------------------------------------------------------------------
 713 // MyApp
 714 //-----------------------------------------------------------------------------
 715
 716 bool MyApp::OnInit()
 717 {
 718 #if wxUSE_LIBPNG
 719   wxImage::AddHandler( new wxPNGHandler );
 720 #endif
 721
 722 #if wxUSE_LIBJPEG
 723   wxImage::AddHandler( new wxJPEGHandler );
 724 #endif
 725
 726 #if wxUSE_LIBTIFF
 727   wxImage::AddHandler( new wxTIFFHandler );
 728 #endif
 729
 730 #if wxUSE_GIF
 731   wxImage::AddHandler( new wxGIFHandler );
 732 #endif
 733
 734 #if wxUSE_PCX
 735   wxImage::AddHandler( new wxPCXHandler );
 736 #endif
 737
 738 #if wxUSE_PNM
 739   wxImage::AddHandler( new wxPNMHandler );
 740 #endif
 741
 742 #if wxUSE_XPM
 743   wxImage::AddHandler( new wxXPMHandler );
 744 #endif
 745
 746 #if wxUSE_ICO_CUR
 747   wxImage::AddHandler( new wxICOHandler );
 748   wxImage::AddHandler( new wxCURHandler );
 749 #endif
 750
 751   wxFrame *frame = new MyFrame();
 752   frame->Show( TRUE );
 753
 754   return TRUE;
 755 }
 756