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