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
  23 #include "wx/file.h"
  24
  25 #include "smile.xbm"
  26 #include "smile.xpm"
  27
  28 // derived classes
  29
  30 class MyFrame;
  31 class MyApp;
  32
  33 // MyCanvas
  34
  35 class MyCanvas: public wxScrolledWindow
  36 {
  37 public:
  38     MyCanvas() {};
  39     MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
  40     ~MyCanvas();
  41     void OnPaint( wxPaintEvent &event );
  42     void CreateAntiAliasedBitmap();
  43
  44     wxBitmap  *my_horse_png;
  45     wxBitmap  *my_horse_jpeg;
  46     wxBitmap  *my_horse_gif;
  47     wxBitmap  *my_horse_bmp;
  48     wxBitmap  *my_horse_pcx;
  49     wxBitmap  *my_horse_pnm;
  50     wxBitmap  *my_horse_tiff;
  51     wxBitmap  *my_smile_xbm;
  52     wxBitmap  *my_square;
  53     wxBitmap  *my_anti;
  54
  55 protected:
  56     wxBitmap m_bmpSmileXpm;
  57     wxIcon   m_iconSmileXpm;
  58
  59 private:
  60     DECLARE_DYNAMIC_CLASS(MyCanvas)
  61     DECLARE_EVENT_TABLE()
  62 };
  63
  64 // MyFrame
  65
  66 class MyFrame: public wxFrame
  67 {
  68 public:
  69     MyFrame();
  70
  71     void OnAbout( wxCommandEvent &event );
  72     void OnQuit( wxCommandEvent &event );
  73
  74     MyCanvas         *m_canvas;
  75
  76 private:
  77     DECLARE_DYNAMIC_CLASS(MyFrame)
  78     DECLARE_EVENT_TABLE()
  79 };
  80
  81 // MyApp
  82
  83 class MyApp: public wxApp
  84 {
  85 public:
  86     virtual bool OnInit();
  87 };
  88
  89 // main program
  90
  91 IMPLEMENT_APP(MyApp)
  92
  93 // MyCanvas
  94
  95 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
  96
  97 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
  98   EVT_PAINT(MyCanvas::OnPaint)
  99 END_EVENT_TABLE()
 100
 101 MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
 102                     const wxPoint &pos, const wxSize &size )
 103         : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
 104 #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
 105           , m_bmpSmileXpm((const char **) smile_xpm)
 106           , m_iconSmileXpm((const char **) smile_xpm)
 107 #endif
 108 {
 109     my_horse_png = (wxBitmap*) NULL;
 110     my_horse_jpeg = (wxBitmap*) NULL;
 111     my_horse_gif = (wxBitmap*) NULL;
 112     my_horse_bmp = (wxBitmap*) NULL;
 113     my_horse_pcx = (wxBitmap*) NULL;
 114     my_horse_pnm = (wxBitmap*) NULL;
 115     my_horse_tiff = (wxBitmap*) NULL;
 116     my_smile_xbm = (wxBitmap*) NULL;
 117     my_square = (wxBitmap*) NULL;
 118     my_anti = (wxBitmap*) NULL;
 119
 120     SetBackgroundColour(* wxWHITE);
 121
 122     wxBitmap bitmap( 100, 100 );
 123
 124     wxMemoryDC dc;
 125     dc.SelectObject( bitmap );
 126     dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 127     dc.SetPen( *wxBLACK_PEN );
 128     dc.DrawRectangle( 0, 0, 100, 100 );
 129     dc.SetBrush( *wxWHITE_BRUSH );
 130     dc.DrawRectangle( 20, 20, 60, 60 );
 131     dc.SelectObject( wxNullBitmap );
 132
 133     // try to find the directory with our images
 134     wxString dir;
 135     if ( wxFile::Exists("./horse.png") )
 136         dir = "./";
 137     else if ( wxFile::Exists("../horse.png") )
 138         dir = "../";
 139     else
 140         wxLogWarning("Can't find image files in either '.' or '..'!");
 141
 142     wxImage image( bitmap );
 143
 144 #if wxUSE_LIBPNG
 145     if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG ) )
 146         wxLogError("Can't save file");
 147
 148     if ( !image.LoadFile( dir + wxString("horse.png"), wxBITMAP_TYPE_PNG ) )
 149         wxLogError("Can't load PNG image");
 150     else
 151         my_horse_png = new wxBitmap( image.ConvertToBitmap() );
 152 #endif // wxUSE_LIBPNG
 153
 154 #if wxUSE_LIBJPEG
 155     if ( !image.LoadFile( dir + wxString("horse.jpg") ) )
 156         wxLogError("Can't load JPG image");
 157     else
 158         my_horse_jpeg = new wxBitmap( image.ConvertToBitmap() );
 159 #endif // wxUSE_LIBJPEG
 160
 161 #if wxUSE_GIF
 162     if ( !image.LoadFile( dir + wxString("horse.gif") ) )
 163         wxLogError("Can't load GIF image");
 164     else
 165         my_horse_gif = new wxBitmap( image.ConvertToBitmap() );
 166 #endif
 167
 168 #if wxUSE_PCX
 169     if ( !image.LoadFile( dir + wxString("horse.pcx"), wxBITMAP_TYPE_PCX ) )
 170         wxLogError("Can't load PCX image");
 171     else
 172         my_horse_pcx = new wxBitmap( image.ConvertToBitmap() );
 173
 174     image.LoadFile( dir + wxString("test.pcx") );
 175     my_square = new wxBitmap( image.ConvertToBitmap() );
 176 #endif
 177
 178     if ( !image.LoadFile( dir + wxString("horse.bmp"), wxBITMAP_TYPE_BMP ) )
 179         wxLogError("Can't load BMP image");
 180     else
 181         my_horse_bmp = new wxBitmap( image.ConvertToBitmap() );
 182
 183 #if wxUSE_PNM
 184     if ( !image.LoadFile( dir + wxString("horse.pnm"), wxBITMAP_TYPE_PNM ) )
 185         wxLogError("Can't load PNM image");
 186     else
 187         my_horse_pnm = new wxBitmap( image.ConvertToBitmap() );
 188 #endif
 189
 190 #if wxUSE_LIBTIFF
 191     if ( !image.LoadFile( dir + wxString("horse.tif"), wxBITMAP_TYPE_TIF ) )
 192         wxLogError("Can't load TIFF image");
 193     else
 194         my_horse_tiff = new wxBitmap( image.ConvertToBitmap() );
 195 #endif
 196
 197     CreateAntiAliasedBitmap();
 198
 199     my_smile_xbm = new wxBitmap( (const char*)smile_bits, smile_width,
 200                                  smile_height, 1 );
 201
 202 #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
 203     // demonstrates XPM automatically using the mask when saving
 204     if ( m_bmpSmileXpm.Ok() )
 205         m_bmpSmileXpm.SaveFile("saved.xpm", wxBITMAP_TYPE_XPM);
 206 #endif
 207 }
 208
 209 MyCanvas::~MyCanvas()
 210 {
 211     delete my_horse_pnm;
 212     delete my_horse_png;
 213     delete my_horse_jpeg;
 214     delete my_horse_gif;
 215     delete my_horse_bmp;
 216     delete my_horse_pcx;
 217     delete my_horse_tiff;
 218     delete my_smile_xbm;
 219     delete my_square;
 220     delete my_anti;
 221 }
 222
 223 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 224 {
 225     wxPaintDC dc( this );
 226     PrepareDC( dc );
 227
 228     dc.DrawText( "Loaded image", 30, 10 );
 229     if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
 230
 231     dc.DrawText( "Drawn directly", 150, 10 );
 232     dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 233     dc.SetPen( *wxBLACK_PEN );
 234     dc.DrawRectangle( 150, 30, 100, 100 );
 235     dc.SetBrush( *wxWHITE_BRUSH );
 236     dc.DrawRectangle( 170, 50, 60, 60 );
 237
 238     if (my_anti && my_anti->Ok())
 239         dc.DrawBitmap( *my_anti, 280, 30 );
 240
 241     dc.DrawText( "PNG handler", 30, 135 );
 242     if (my_horse_png && my_horse_png->Ok())
 243     {
 244         dc.DrawBitmap( *my_horse_png, 30, 150 );
 245         wxRect rect(0,0,100,100);
 246         wxBitmap sub( my_horse_png->GetSubBitmap(rect) );
 247         dc.DrawText( "GetSubBitmap()", 280, 190 );
 248         dc.DrawBitmap( sub, 280, 210 );
 249     }
 250
 251     dc.DrawText( "JPEG handler", 30, 365 );
 252     if (my_horse_jpeg && my_horse_jpeg->Ok())
 253         dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
 254
 255     dc.DrawText( "GIF handler", 30, 595 );
 256     if (my_horse_gif && my_horse_gif->Ok())
 257         dc.DrawBitmap( *my_horse_gif, 30, 610 );
 258
 259     dc.DrawText( "PCX handler", 30, 825 );
 260     if (my_horse_pcx && my_horse_pcx->Ok())
 261         dc.DrawBitmap( *my_horse_pcx, 30, 840 );
 262
 263     dc.DrawText( "BMP handler", 30, 1055 );
 264     if (my_horse_bmp && my_horse_bmp->Ok())
 265         dc.DrawBitmap( *my_horse_bmp, 30, 1070 );
 266
 267     dc.DrawText( "PNM handler", 30, 1285 );
 268     if (my_horse_pnm && my_horse_pnm->Ok())
 269         dc.DrawBitmap( *my_horse_pnm, 30, 1300 );
 270
 271     dc.DrawText( "TIFF handler", 30, 1515 );
 272     if (my_horse_tiff && my_horse_tiff->Ok())
 273         dc.DrawBitmap( *my_horse_tiff, 30, 1530 );
 274
 275     if (my_smile_xbm && my_smile_xbm->Ok())
 276     {
 277         dc.DrawText( "XBM bitmap", 30, 1745 );
 278         dc.SetTextForeground( "RED" );
 279         dc.SetTextBackground( "GREEN" );
 280         dc.DrawBitmap( *my_smile_xbm, 30, 1760 );
 281
 282         dc.DrawText( "After wxImage conversion", 150, 1745 );
 283         wxImage i( *my_smile_xbm );
 284         i.SetMaskColour( 0,0,0 );
 285         i.Replace( 255,255,255,
 286                wxRED_PEN->GetColour().Red(),
 287                wxRED_PEN->GetColour().Green(),
 288                wxRED_PEN->GetColour().Blue() );
 289         dc.DrawBitmap( i.ConvertToBitmap(), 150, 1760, TRUE );
 290     }
 291     dc.SetTextForeground( "BLACK" );
 292
 293     wxBitmap mono( 60,50,1 );
 294     wxMemoryDC memdc;
 295     memdc.SelectObject( mono );
 296     memdc.SetPen( *wxBLACK_PEN );
 297     memdc.SetBrush( *wxWHITE_BRUSH );
 298     memdc.DrawRectangle( 0,0,60,50 );
 299     memdc.SetTextForeground( *wxBLACK );
 300     memdc.DrawText( "Hi!", 5, 5 );
 301     memdc.SetBrush( *wxBLACK_BRUSH );
 302     memdc.DrawRectangle( 33,5,20,20 );
 303     memdc.SetPen( *wxRED_PEN );
 304     memdc.DrawLine( 5, 42, 50, 42 );
 305     memdc.SelectObject( wxNullBitmap );
 306     if (mono.Ok())
 307     {
 308         dc.DrawText( "Mono bitmap", 30, 1845 );
 309         dc.SetTextForeground( "RED" );
 310         dc.SetTextBackground( "GREEN" );
 311         dc.DrawBitmap( mono, 30, 1860 );
 312
 313         dc.SetTextForeground( "BLACK" );
 314         dc.DrawText( "After wxImage conversion", 150, 1845 );
 315         dc.SetTextForeground( "RED" );
 316         wxImage i( mono );
 317         i.SetMaskColour( 255,255,255 );
 318         i.Replace( 0,0,0,
 319                wxRED_PEN->GetColour().Red(),
 320                wxRED_PEN->GetColour().Green(),
 321                wxRED_PEN->GetColour().Blue() );
 322         dc.DrawBitmap( i.ConvertToBitmap(), 150, 1860, TRUE );
 323         dc.SetTextForeground( "BLACK" );
 324     }
 325
 326     dc.DrawText("XPM bitmap", 30, 1950);
 327     if ( m_bmpSmileXpm.Ok() )
 328     {
 329         dc.DrawBitmap(m_bmpSmileXpm, 30, 1975, TRUE);
 330     }
 331
 332     dc.DrawText("XPM icon", 150, 1950);
 333     if ( m_iconSmileXpm.Ok() )
 334     {
 335         dc.DrawIcon(m_iconSmileXpm, 150, 1975);
 336     }
 337 }
 338
 339 void MyCanvas::CreateAntiAliasedBitmap()
 340 {
 341   wxBitmap bitmap( 300, 300 );
 342
 343   wxMemoryDC dc;
 344
 345   dc.SelectObject( bitmap );
 346
 347   dc.Clear();
 348
 349   dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) );
 350   dc.SetTextForeground( "RED" );
 351   dc.DrawText( "This is anti-aliased Text.", 20, 20 );
 352   dc.DrawText( "And a Rectangle.", 20, 60 );
 353
 354   dc.SetBrush( *wxRED_BRUSH );
 355   dc.SetPen( *wxTRANSPARENT_PEN );
 356   dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
 357
 358   wxImage original( bitmap );
 359   wxImage anti( 150, 150 );
 360
 361   /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
 362
 363   for (int y = 1; y < 149; y++)
 364     for (int x = 1; x < 149; x++)
 365     {
 366        int red = original.GetRed( x*2, y*2 ) +
 367                  original.GetRed( x*2-1, y*2 ) +
 368                  original.GetRed( x*2, y*2+1 ) +
 369                  original.GetRed( x*2+1, y*2+1 );
 370        red = red/4;
 371
 372        int green = original.GetGreen( x*2, y*2 ) +
 373                    original.GetGreen( x*2-1, y*2 ) +
 374                    original.GetGreen( x*2, y*2+1 ) +
 375                    original.GetGreen( x*2+1, y*2+1 );
 376        green = green/4;
 377
 378        int blue = original.GetBlue( x*2, y*2 ) +
 379                   original.GetBlue( x*2-1, y*2 ) +
 380                   original.GetBlue( x*2, y*2+1 ) +
 381                   original.GetBlue( x*2+1, y*2+1 );
 382        blue = blue/4;
 383        anti.SetRGB( x, y, red, green, blue );
 384     }
 385   my_anti = new wxBitmap( anti.ConvertToBitmap() );
 386 }
 387
 388 // MyFrame
 389
 390 const int ID_QUIT  = 108;
 391 const int ID_ABOUT = 109;
 392
 393 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 394
 395 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 396   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 397   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 398 END_EVENT_TABLE()
 399
 400 MyFrame::MyFrame()
 401        : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
 402                   wxPoint(20,20), wxSize(470,360) )
 403 {
 404   wxMenu *file_menu = new wxMenu();
 405   file_menu->Append( ID_ABOUT, "&About...");
 406   file_menu->Append( ID_QUIT, "E&xit");
 407
 408   wxMenuBar *menu_bar = new wxMenuBar();
 409   menu_bar->Append(file_menu, "&File");
 410
 411   SetMenuBar( menu_bar );
 412
 413   CreateStatusBar(2);
 414   int widths[] = { -1, 100 };
 415   SetStatusWidths( 2, widths );
 416
 417   m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
 418
 419   // 500 width * 2100 height
 420   m_canvas->SetScrollbars( 10, 10, 50, 210 );
 421 }
 422
 423 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 424 {
 425   Close( TRUE );
 426 }
 427
 428 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 429 {
 430   (void)wxMessageBox( "wxImage demo\n"
 431                       "Robert Roebling (c) 1998,2000",
 432                       "About wxImage Demo", wxICON_INFORMATION | wxOK );
 433 }
 434
 435 //-----------------------------------------------------------------------------
 436 // MyApp
 437 //-----------------------------------------------------------------------------
 438
 439 bool MyApp::OnInit()
 440 {
 441 #if wxUSE_LIBPNG
 442   wxImage::AddHandler( new wxPNGHandler );
 443 #endif
 444
 445 #if wxUSE_LIBJPEG
 446   wxImage::AddHandler( new wxJPEGHandler );
 447 #endif
 448
 449 #if wxUSE_LIBTIFF
 450   wxImage::AddHandler( new wxTIFFHandler );
 451 #endif
 452
 453 #if wxUSE_GIF
 454   wxImage::AddHandler( new wxGIFHandler );
 455 #endif
 456
 457 #if wxUSE_PCX
 458   wxImage::AddHandler( new wxPCXHandler );
 459 #endif
 460
 461 #if wxUSE_PNM
 462   wxImage::AddHandler( new wxPNMHandler );
 463 #endif
 464
 465   wxFrame *frame = new MyFrame();
 466   frame->Show( TRUE );
 467
 468   return TRUE;
 469 }
 470