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