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