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
  24 #include "smile.xbm"
  25 #include "smile.xpm"
  26
  27 // derived classes
  28
  29 class MyFrame;
  30 class MyApp;
  31
  32 // MyCanvas
  33
  34 class MyCanvas: public wxScrolledWindow
  35 {
  36 public:
  37     MyCanvas() {};
  38     MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
  39     ~MyCanvas();
  40     void OnPaint( wxPaintEvent &event );
  41     void CreateAntiAliasedBitmap();
  42
  43     wxBitmap  *my_horse_png;
  44     wxBitmap  *my_horse_jpeg;
  45     wxBitmap  *my_horse_gif;
  46     wxBitmap  *my_horse_bmp;
  47     wxBitmap  *my_horse_pcx;
  48     wxBitmap  *my_horse_pnm;
  49     wxBitmap  *my_horse_tiff;
  50     wxBitmap  *my_smile_xbm;
  51     wxBitmap  *my_square;
  52     wxBitmap  *my_anti;
  53
  54 protected:
  55     wxBitmap m_bmpSmileXpm;
  56     wxIcon   m_iconSmileXpm;
  57
  58 private:
  59     DECLARE_DYNAMIC_CLASS(MyCanvas)
  60     DECLARE_EVENT_TABLE()
  61 };
  62
  63 // MyFrame
  64
  65 class MyFrame: public wxFrame
  66 {
  67 public:
  68     MyFrame();
  69
  70     void OnAbout( wxCommandEvent &event );
  71     void OnQuit( wxCommandEvent &event );
  72
  73     MyCanvas         *m_canvas;
  74
  75 private:
  76     DECLARE_DYNAMIC_CLASS(MyFrame)
  77     DECLARE_EVENT_TABLE()
  78 };
  79
  80 // MyApp
  81
  82 class MyApp: public wxApp
  83 {
  84 public:
  85     virtual bool OnInit();
  86 };
  87
  88 // main program
  89
  90 IMPLEMENT_APP(MyApp)
  91
  92 // MyCanvas
  93
  94 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
  95
  96 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
  97   EVT_PAINT(MyCanvas::OnPaint)
  98 END_EVENT_TABLE()
  99
 100 MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
 101                     const wxPoint &pos, const wxSize &size )
 102         : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
 103 #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
 104           , m_bmpSmileXpm((const char **) smile_xpm)
 105           , m_iconSmileXpm((const char **) smile_xpm)
 106 #endif
 107 {
 108     my_horse_png = (wxBitmap*) NULL;
 109     my_horse_jpeg = (wxBitmap*) NULL;
 110     my_horse_gif = (wxBitmap*) NULL;
 111     my_horse_bmp = (wxBitmap*) NULL;
 112     my_horse_pcx = (wxBitmap*) NULL;
 113     my_horse_pnm = (wxBitmap*) NULL;
 114     my_horse_tiff = (wxBitmap*) NULL;
 115     my_smile_xbm = (wxBitmap*) NULL;
 116     my_square = (wxBitmap*) NULL;
 117     my_anti = (wxBitmap*) NULL;
 118
 119     SetBackgroundColour(* wxWHITE);
 120
 121     wxBitmap bitmap( 100, 100 );
 122
 123     wxMemoryDC dc;
 124     dc.SelectObject( bitmap );
 125     dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 126     dc.SetPen( *wxBLACK_PEN );
 127     dc.DrawRectangle( 0, 0, 100, 100 );
 128     dc.SetBrush( *wxWHITE_BRUSH );
 129     dc.DrawRectangle( 20, 20, 60, 60 );
 130     dc.SelectObject( wxNullBitmap );
 131
 132     // try to find the directory with our images
 133     wxString dir;
 134     if ( wxFile::Exists("./horse.png") )
 135         dir = "./";
 136     else if ( wxFile::Exists("../horse.png") )
 137         dir = "../";
 138     else
 139         wxLogWarning("Can't find image files in either '.' or '..'!");
 140
 141     wxImage image( bitmap );
 142
 143 #if wxUSE_LIBPNG
 144     if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG ))
 145         wxLogError("Can't save file");
 146
 147     image.Destroy();
 148
 149     image.LoadFile( dir + wxString("test.png") );
 150     my_square = new wxBitmap( image.ConvertToBitmap() );
 151
 152     image.Destroy();
 153
 154     if ( !image.LoadFile( dir + wxString("horse.png")) )
 155         wxLogError("Can't load PNG image");
 156     else
 157         my_horse_png = new wxBitmap( image.ConvertToBitmap() );
 158 #endif // wxUSE_LIBPNG
 159
 160 #if wxUSE_LIBJPEG
 161     image.Destroy();
 162
 163     if ( !image.LoadFile( dir + wxString("horse.jpg")) )
 164         wxLogError("Can't load JPG image");
 165     else
 166         my_horse_jpeg = new wxBitmap( image.ConvertToBitmap() );
 167 #endif // wxUSE_LIBJPEG
 168
 169 #if wxUSE_GIF
 170     image.Destroy();
 171
 172     if ( !image.LoadFile( dir + wxString("horse.gif")) )
 173         wxLogError("Can't load GIF image");
 174     else
 175         my_horse_gif = new wxBitmap( image.ConvertToBitmap() );
 176 #endif
 177
 178 #if wxUSE_PCX
 179     image.Destroy();
 180
 181     if ( !image.LoadFile( dir + wxString("horse.pcx"), wxBITMAP_TYPE_PCX ) )
 182         wxLogError("Can't load PCX image");
 183     else
 184         my_horse_pcx = new wxBitmap( image.ConvertToBitmap() );
 185 #endif
 186
 187     image.Destroy();
 188
 189     if ( !image.LoadFile( dir + wxString("horse.bmp"), wxBITMAP_TYPE_BMP ) )
 190         wxLogError("Can't load BMP image");
 191     else
 192         my_horse_bmp = new wxBitmap( image.ConvertToBitmap() );
 193
 194 #if wxUSE_PNM
 195     image.Destroy();
 196
 197     if ( !image.LoadFile( dir + wxString("horse.pnm"), wxBITMAP_TYPE_PNM ) )
 198         wxLogError("Can't load PNM image");
 199     else
 200         my_horse_pnm = new wxBitmap( image.ConvertToBitmap() );
 201 #endif
 202
 203 #if wxUSE_LIBTIFF
 204     image.Destroy();
 205
 206     if ( !image.LoadFile( dir + wxString("horse.tif"), wxBITMAP_TYPE_TIF ) )
 207         wxLogError("Can't load TIFF image");
 208     else
 209         my_horse_tiff = new wxBitmap( image.ConvertToBitmap() );
 210 #endif
 211
 212     CreateAntiAliasedBitmap();
 213
 214     my_smile_xbm = new wxBitmap( (const char*)smile_bits, smile_width,
 215                                  smile_height, 1 );
 216
 217 #ifndef __WXGTK__
 218 #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
 219     // demonstrates XPM automatically using the mask when saving
 220     if ( m_bmpSmileXpm.Ok() )
 221         m_bmpSmileXpm.SaveFile("saved.xpm", wxBITMAP_TYPE_XPM);
 222 #endif
 223 #endif
 224 }
 225
 226 MyCanvas::~MyCanvas()
 227 {
 228     delete my_horse_pnm;
 229     delete my_horse_png;
 230     delete my_horse_jpeg;
 231     delete my_horse_gif;
 232     delete my_horse_bmp;
 233     delete my_horse_pcx;
 234     delete my_horse_tiff;
 235     delete my_smile_xbm;
 236     delete my_square;
 237     delete my_anti;
 238 }
 239
 240 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 241 {
 242     wxPaintDC dc( this );
 243     PrepareDC( dc );
 244
 245     dc.DrawText( "Loaded image", 30, 10 );
 246     if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
 247
 248     dc.DrawText( "Drawn directly", 150, 10 );
 249     dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 250     dc.SetPen( *wxBLACK_PEN );
 251     dc.DrawRectangle( 150, 30, 100, 100 );
 252     dc.SetBrush( *wxWHITE_BRUSH );
 253     dc.DrawRectangle( 170, 50, 60, 60 );
 254
 255     if (my_anti && my_anti->Ok())
 256         dc.DrawBitmap( *my_anti, 280, 30 );
 257
 258     dc.DrawText( "PNG handler", 30, 135 );
 259     if (my_horse_png && my_horse_png->Ok())
 260     {
 261         dc.DrawBitmap( *my_horse_png, 30, 150 );
 262         wxRect rect(0,0,100,100);
 263         wxBitmap sub( my_horse_png->GetSubBitmap(rect) );
 264         dc.DrawText( "GetSubBitmap()", 280, 190 );
 265         dc.DrawBitmap( sub, 280, 210 );
 266     }
 267
 268     dc.DrawText( "JPEG handler", 30, 365 );
 269     if (my_horse_jpeg && my_horse_jpeg->Ok())
 270         dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
 271
 272     dc.DrawText( "GIF handler", 30, 595 );
 273     if (my_horse_gif && my_horse_gif->Ok())
 274         dc.DrawBitmap( *my_horse_gif, 30, 610 );
 275
 276     dc.DrawText( "PCX handler", 30, 825 );
 277     if (my_horse_pcx && my_horse_pcx->Ok())
 278         dc.DrawBitmap( *my_horse_pcx, 30, 840 );
 279
 280     dc.DrawText( "BMP handler", 30, 1055 );
 281     if (my_horse_bmp && my_horse_bmp->Ok())
 282         dc.DrawBitmap( *my_horse_bmp, 30, 1070 );
 283
 284     dc.DrawText( "PNM handler", 30, 1285 );
 285     if (my_horse_pnm && my_horse_pnm->Ok())
 286         dc.DrawBitmap( *my_horse_pnm, 30, 1300 );
 287
 288     dc.DrawText( "TIFF handler", 30, 1515 );
 289     if (my_horse_tiff && my_horse_tiff->Ok())
 290         dc.DrawBitmap( *my_horse_tiff, 30, 1530 );
 291
 292     if (my_smile_xbm && my_smile_xbm->Ok())
 293     {
 294         dc.DrawText( "XBM bitmap", 30, 1745 );
 295         dc.DrawText( "(green on red)", 30, 1760 );
 296         dc.SetTextForeground( "GREEN" );
 297         dc.SetTextBackground( "RED" );
 298         dc.DrawBitmap( *my_smile_xbm, 30, 1780 );
 299
 300         dc.SetTextForeground( "BLACK" );
 301         dc.DrawText( "After wxImage conversion", 150, 1745 );
 302         dc.DrawText( "(red on white)", 150, 1760 );
 303         dc.SetTextForeground( "RED" );
 304         wxImage i( *my_smile_xbm );
 305         i.SetMaskColour( 255, 255, 255 );
 306         i.Replace( 0, 0, 0,
 307                wxRED_PEN->GetColour().Red(),
 308                wxRED_PEN->GetColour().Green(),
 309                wxRED_PEN->GetColour().Blue() );
 310         dc.DrawBitmap( i.ConvertToBitmap(), 150, 1780, TRUE );
 311         dc.SetTextForeground( "BLACK" );
 312     }
 313
 314
 315     wxBitmap mono( 60,50,1 );
 316     wxMemoryDC memdc;
 317     memdc.SelectObject( mono );
 318     memdc.SetPen( *wxBLACK_PEN );
 319     memdc.SetBrush( *wxWHITE_BRUSH );
 320     memdc.DrawRectangle( 0,0,60,50 );
 321     memdc.SetTextForeground( *wxBLACK );
 322     memdc.DrawText( "Hi!", 5, 5 );
 323     memdc.SetBrush( *wxBLACK_BRUSH );
 324     memdc.DrawRectangle( 33,5,20,20 );
 325     memdc.SetPen( *wxRED_PEN );
 326     memdc.DrawLine( 5, 42, 50, 42 );
 327     memdc.SelectObject( wxNullBitmap );
 328
 329     if (mono.Ok())
 330     {
 331         dc.DrawText( "Mono bitmap", 30, 1865 );
 332         dc.DrawText( "(red on green)", 30, 1880 );
 333         dc.SetTextForeground( "RED" );
 334         dc.SetTextBackground( "GREEN" );
 335         dc.DrawBitmap( mono, 30, 1900 );
 336
 337         dc.SetTextForeground( "BLACK" );
 338         dc.DrawText( "After wxImage conversion", 150, 1865 );
 339         dc.DrawText( "(red on white)", 150, 1880 );
 340         dc.SetTextForeground( "RED" );
 341         wxImage i( mono );
 342         i.SetMaskColour( 255,255,255 );
 343         i.Replace( 0,0,0,
 344                wxRED_PEN->GetColour().Red(),
 345                wxRED_PEN->GetColour().Green(),
 346                wxRED_PEN->GetColour().Blue() );
 347         dc.DrawBitmap( i.ConvertToBitmap(), 150, 1900, TRUE );
 348         dc.SetTextForeground( "BLACK" );
 349     }
 350
 351     dc.DrawText("XPM bitmap", 30, 2000);
 352     if ( m_bmpSmileXpm.Ok() )
 353     {
 354         dc.DrawBitmap(m_bmpSmileXpm, 30, 2020, TRUE);
 355     }
 356
 357     dc.DrawText("XPM icon", 150, 2000);
 358     if ( m_iconSmileXpm.Ok() )
 359     {
 360         dc.DrawIcon(m_iconSmileXpm, 150, 2020);
 361     }
 362 }
 363
 364 void MyCanvas::CreateAntiAliasedBitmap()
 365 {
 366   wxBitmap bitmap( 300, 300 );
 367
 368   wxMemoryDC dc;
 369
 370   dc.SelectObject( bitmap );
 371
 372   dc.Clear();
 373
 374   dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) );
 375   dc.SetTextForeground( "RED" );
 376   dc.DrawText( "This is anti-aliased Text.", 20, 20 );
 377   dc.DrawText( "And a Rectangle.", 20, 60 );
 378
 379   dc.SetBrush( *wxRED_BRUSH );
 380   dc.SetPen( *wxTRANSPARENT_PEN );
 381   dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
 382
 383   wxImage original( bitmap );
 384   wxImage anti( 150, 150 );
 385
 386   /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
 387
 388   for (int y = 1; y < 149; y++)
 389     for (int x = 1; x < 149; x++)
 390     {
 391        int red = original.GetRed( x*2, y*2 ) +
 392                  original.GetRed( x*2-1, y*2 ) +
 393                  original.GetRed( x*2, y*2+1 ) +
 394                  original.GetRed( x*2+1, y*2+1 );
 395        red = red/4;
 396
 397        int green = original.GetGreen( x*2, y*2 ) +
 398                    original.GetGreen( x*2-1, y*2 ) +
 399                    original.GetGreen( x*2, y*2+1 ) +
 400                    original.GetGreen( x*2+1, y*2+1 );
 401        green = green/4;
 402
 403        int blue = original.GetBlue( x*2, y*2 ) +
 404                   original.GetBlue( x*2-1, y*2 ) +
 405                   original.GetBlue( x*2, y*2+1 ) +
 406                   original.GetBlue( x*2+1, y*2+1 );
 407        blue = blue/4;
 408        anti.SetRGB( x, y, red, green, blue );
 409     }
 410   my_anti = new wxBitmap( anti.ConvertToBitmap() );
 411 }
 412
 413 // MyFrame
 414
 415 const int ID_QUIT  = 108;
 416 const int ID_ABOUT = 109;
 417
 418 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 419
 420 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 421   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 422   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 423 END_EVENT_TABLE()
 424
 425 MyFrame::MyFrame()
 426        : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
 427                   wxPoint(20,20), wxSize(470,360) )
 428 {
 429   wxMenu *file_menu = new wxMenu();
 430   file_menu->Append( ID_ABOUT, "&About...");
 431   file_menu->Append( ID_QUIT, "E&xit");
 432
 433   wxMenuBar *menu_bar = new wxMenuBar();
 434   menu_bar->Append(file_menu, "&File");
 435
 436   SetMenuBar( menu_bar );
 437
 438   CreateStatusBar(2);
 439   int widths[] = { -1, 100 };
 440   SetStatusWidths( 2, widths );
 441
 442   m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
 443
 444   // 500 width * 2100 height
 445   m_canvas->SetScrollbars( 10, 10, 50, 220 );
 446 }
 447
 448 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 449 {
 450   Close( TRUE );
 451 }
 452
 453 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 454 {
 455   (void)wxMessageBox( "wxImage demo\n"
 456                       "Robert Roebling (c) 1998,2000",
 457                       "About wxImage Demo", wxICON_INFORMATION | wxOK );
 458 }
 459
 460 //-----------------------------------------------------------------------------
 461 // MyApp
 462 //-----------------------------------------------------------------------------
 463
 464 bool MyApp::OnInit()
 465 {
 466 #if wxUSE_LIBPNG
 467   wxImage::AddHandler( new wxPNGHandler );
 468 #endif
 469
 470 #if wxUSE_LIBJPEG
 471   wxImage::AddHandler( new wxJPEGHandler );
 472 #endif
 473
 474 #if wxUSE_LIBTIFF
 475   wxImage::AddHandler( new wxTIFFHandler );
 476 #endif
 477
 478 #if wxUSE_GIF
 479   wxImage::AddHandler( new wxGIFHandler );
 480 #endif
 481
 482 #if wxUSE_PCX
 483   wxImage::AddHandler( new wxPCXHandler );
 484 #endif
 485
 486 #if wxUSE_PNM
 487   wxImage::AddHandler( new wxPNMHandler );
 488 #endif
 489
 490   wxFrame *frame = new MyFrame();
 491   frame->Show( TRUE );
 492
 493   return TRUE;
 494 }
 495