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
  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 private:
  55     DECLARE_DYNAMIC_CLASS(MyCanvas)
  56     DECLARE_EVENT_TABLE()
  57 };
  58
  59 // MyFrame
  60
  61 class MyFrame: public wxFrame
  62 {
  63 public:
  64     MyFrame();
  65
  66     void OnAbout( wxCommandEvent &event );
  67     void OnQuit( wxCommandEvent &event );
  68
  69     MyCanvas         *m_canvas;
  70
  71 private:
  72     DECLARE_DYNAMIC_CLASS(MyFrame)
  73     DECLARE_EVENT_TABLE()
  74 };
  75
  76 // MyApp
  77
  78 class MyApp: public wxApp
  79 {
  80 public:
  81     virtual bool OnInit();
  82 };
  83
  84 // main program
  85
  86 IMPLEMENT_APP(MyApp)
  87
  88 // MyCanvas
  89
  90 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
  91
  92 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
  93   EVT_PAINT(MyCanvas::OnPaint)
  94 END_EVENT_TABLE()
  95
  96 MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
  97                     const wxPoint &pos, const wxSize &size )
  98         : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
  99 {
 100     my_horse_png = (wxBitmap*) NULL;
 101     my_horse_jpeg = (wxBitmap*) NULL;
 102     my_horse_gif = (wxBitmap*) NULL;
 103     my_horse_bmp = (wxBitmap*) NULL;
 104     my_horse_pcx = (wxBitmap*) NULL;
 105     my_horse_pnm = (wxBitmap*) NULL;
 106     my_horse_tiff = (wxBitmap*) NULL;
 107     my_smile_xbm = (wxBitmap*) NULL;
 108     my_square = (wxBitmap*) NULL;
 109     my_anti = (wxBitmap*) NULL;
 110
 111     SetBackgroundColour(* wxWHITE);
 112
 113     wxBitmap bitmap( 100, 100 );
 114
 115     wxMemoryDC dc;
 116     dc.SelectObject( bitmap );
 117     dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 118     dc.SetPen( *wxWHITE_PEN );
 119     dc.DrawRectangle( 0, 0, 100, 100 );
 120     dc.SelectObject( wxNullBitmap );
 121
 122     // try to find the directory with our images
 123     wxString dir;
 124     if ( wxFile::Exists("./horse.png") )
 125         dir = "./";
 126     else if ( wxFile::Exists("../horse.png") )
 127         dir = "../";
 128     else
 129         wxLogWarning("Can't find image files in either '.' or '..'!");
 130
 131     wxImage image( bitmap );
 132
 133     if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG ) )
 134         wxLogError("Can't save file");
 135
 136     if ( !image.LoadFile( dir + wxString("horse.png"), wxBITMAP_TYPE_PNG ) )
 137         wxLogError("Can't load PNG image");
 138     else
 139         my_horse_png = new wxBitmap( image.ConvertToBitmap() );
 140
 141     if ( !image.LoadFile( dir + wxString("horse.jpg") ) )
 142         wxLogError("Can't load JPG image");
 143     else
 144         my_horse_jpeg = new wxBitmap( image.ConvertToBitmap() );
 145
 146 #if wxUSE_GIF
 147     if ( !image.LoadFile( dir + wxString("horse.gif") ) )
 148         wxLogError("Can't load GIF image");
 149     else
 150         my_horse_gif = new wxBitmap( image.ConvertToBitmap() );
 151 #endif
 152
 153 #if wxUSE_PCX
 154     if ( !image.LoadFile( dir + wxString("horse.pcx"), wxBITMAP_TYPE_PCX ) )
 155         wxLogError("Can't load PCX image");
 156     else
 157         my_horse_pcx = new wxBitmap( image.ConvertToBitmap() );
 158 #endif
 159
 160     if ( !image.LoadFile( dir + wxString("horse.bmp"), wxBITMAP_TYPE_BMP ) )
 161         wxLogError("Can't load BMP image");
 162     else
 163         my_horse_bmp = new wxBitmap( image.ConvertToBitmap() );
 164
 165 #if wxUSE_PNM
 166     if ( !image.LoadFile( dir + wxString("horse.pnm"), wxBITMAP_TYPE_PNM ) )
 167         wxLogError("Can't load PNM image");
 168     else
 169         my_horse_pnm = new wxBitmap( image.ConvertToBitmap() );
 170 #endif
 171
 172 #if wxUSE_LIBTIFF
 173     if ( !image.LoadFile( dir + wxString("horse.tif"), wxBITMAP_TYPE_TIF ) )
 174         wxLogError("Can't load TIFF image");
 175     else
 176         my_horse_tiff = new wxBitmap( image.ConvertToBitmap() );
 177 #endif
 178
 179     image.LoadFile( dir + wxString("test.png") );
 180     my_square = new wxBitmap( image.ConvertToBitmap() );
 181
 182     CreateAntiAliasedBitmap();
 183
 184     my_smile_xbm = new wxBitmap( (const char*)smile_bits, smile_width,
 185                                  smile_height, 1 );
 186 }
 187
 188 MyCanvas::~MyCanvas()
 189 {
 190     delete my_horse_pnm;
 191     delete my_horse_png;
 192     delete my_horse_jpeg;
 193     delete my_horse_gif;
 194     delete my_horse_bmp;
 195     delete my_horse_pcx;
 196     delete my_horse_tiff;
 197     delete my_smile_xbm;
 198     delete my_square;
 199     delete my_anti;
 200 }
 201
 202 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 203 {
 204     wxPaintDC dc( this );
 205     PrepareDC( dc );
 206
 207     dc.DrawText( "Loaded image", 30, 10 );
 208     if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
 209
 210     dc.DrawText( "Drawn directly", 150, 10 );
 211     dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 212     dc.SetPen( *wxWHITE_PEN );
 213     dc.DrawRectangle( 150, 30, 100, 100 );
 214
 215     if (my_anti && my_anti->Ok())
 216         dc.DrawBitmap( *my_anti, 280, 30 );
 217
 218     dc.DrawText( "PNG handler", 30, 135 );
 219     if (my_horse_png && my_horse_png->Ok())
 220     {
 221         dc.DrawBitmap( *my_horse_png, 30, 150 );
 222         wxRect rect(0,0,100,100);
 223         wxBitmap sub( my_horse_png->GetSubBitmap(rect) );
 224         dc.DrawText( "GetSubBitmap()", 280, 190 );
 225         dc.DrawBitmap( sub, 280, 210 );
 226     }
 227
 228     dc.DrawText( "JPEG handler", 30, 365 );
 229     if (my_horse_jpeg && my_horse_jpeg->Ok())
 230         dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
 231
 232     dc.DrawText( "GIF handler", 30, 595 );
 233     if (my_horse_gif && my_horse_gif->Ok())
 234         dc.DrawBitmap( *my_horse_gif, 30, 610 );
 235
 236     dc.DrawText( "PCX handler", 30, 825 );
 237     if (my_horse_pcx && my_horse_pcx->Ok())
 238         dc.DrawBitmap( *my_horse_pcx, 30, 840 );
 239
 240     dc.DrawText( "BMP handler", 30, 1055 );
 241     if (my_horse_bmp && my_horse_bmp->Ok())
 242         dc.DrawBitmap( *my_horse_bmp, 30, 1070 );
 243
 244     dc.DrawText( "PNM handler", 30, 1285 );
 245     if (my_horse_pnm && my_horse_pnm->Ok())
 246         dc.DrawBitmap( *my_horse_pnm, 30, 1300 );
 247
 248     dc.DrawText( "TIFF handler", 30, 1515 );
 249     if (my_horse_tiff && my_horse_tiff->Ok())
 250         dc.DrawBitmap( *my_horse_pnm, 30, 1530 );
 251
 252     if (my_smile_xbm && my_smile_xbm->Ok())
 253     {
 254         dc.DrawText( "XBM bitmap", 30, 1745 );
 255         dc.SetPen( *wxRED_PEN );
 256         dc.DrawBitmap( *my_smile_xbm, 30, 1760 );
 257
 258         dc.DrawText( "After wxImage conversion", 150, 1745 );
 259         wxImage i( *my_smile_xbm );
 260         i.SetMaskColour( 0,0,0 );
 261         i.Replace( 255,255,255,
 262                wxRED_PEN->GetColour().Red(),
 263                wxRED_PEN->GetColour().Green(),
 264                wxRED_PEN->GetColour().Blue() );
 265         dc.DrawBitmap( i.ConvertToBitmap(), 150, 1760, TRUE );
 266     }
 267 }
 268
 269 void MyCanvas::CreateAntiAliasedBitmap()
 270 {
 271   wxBitmap bitmap( 300, 300 );
 272
 273   wxMemoryDC dc;
 274
 275   dc.SelectObject( bitmap );
 276
 277   dc.Clear();
 278
 279   dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) );
 280   dc.SetTextForeground( "RED" );
 281   dc.DrawText( "This is anti-aliased Text.", 20, 20 );
 282   dc.DrawText( "And a Rectangle.", 20, 60 );
 283
 284   dc.SetBrush( *wxRED_BRUSH );
 285   dc.SetPen( *wxTRANSPARENT_PEN );
 286   dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
 287
 288   wxImage original( bitmap );
 289   wxImage anti( 150, 150 );
 290
 291   /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
 292
 293   for (int y = 1; y < 149; y++)
 294     for (int x = 1; x < 149; x++)
 295     {
 296        int red = original.GetRed( x*2, y*2 ) +
 297                  original.GetRed( x*2-1, y*2 ) +
 298                  original.GetRed( x*2, y*2+1 ) +
 299                  original.GetRed( x*2+1, y*2+1 );
 300        red = red/4;
 301
 302        int green = original.GetGreen( x*2, y*2 ) +
 303                    original.GetGreen( x*2-1, y*2 ) +
 304                    original.GetGreen( x*2, y*2+1 ) +
 305                    original.GetGreen( x*2+1, y*2+1 );
 306        green = green/4;
 307
 308        int blue = original.GetBlue( x*2, y*2 ) +
 309                   original.GetBlue( x*2-1, y*2 ) +
 310                   original.GetBlue( x*2, y*2+1 ) +
 311                   original.GetBlue( x*2+1, y*2+1 );
 312        blue = blue/4;
 313        anti.SetRGB( x, y, red, green, blue );
 314     }
 315   my_anti = new wxBitmap( anti.ConvertToBitmap() );
 316 }
 317
 318 // MyFrame
 319
 320 const int ID_QUIT  = 108;
 321 const int ID_ABOUT = 109;
 322
 323 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 324
 325 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 326   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 327   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 328 END_EVENT_TABLE()
 329
 330 MyFrame::MyFrame()
 331        : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
 332                   wxPoint(20,20), wxSize(470,360) )
 333 {
 334   wxMenu *file_menu = new wxMenu();
 335   file_menu->Append( ID_ABOUT, "&About..");
 336   file_menu->Append( ID_QUIT, "E&xit");
 337
 338   wxMenuBar *menu_bar = new wxMenuBar();
 339   menu_bar->Append(file_menu, "&File");
 340
 341   SetMenuBar( menu_bar );
 342
 343   CreateStatusBar(2);
 344   int widths[] = { -1, 100 };
 345   SetStatusWidths( 2, widths );
 346
 347   m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
 348
 349   // 500 width * 1900 height
 350   m_canvas->SetScrollbars( 10, 10, 50, 190 );
 351 }
 352
 353 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 354 {
 355   Close( TRUE );
 356 }
 357
 358 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 359 {
 360   (void)wxMessageBox( "wxImage demo\n"
 361                       "\n"
 362                       "Robert Roebling (c) 1998",
 363                       "About wxImage Demo", wxICON_INFORMATION | wxOK );
 364 }
 365
 366 //-----------------------------------------------------------------------------
 367 // MyApp
 368 //-----------------------------------------------------------------------------
 369
 370 bool MyApp::OnInit()
 371 {
 372 #if wxUSE_LIBPNG
 373   wxImage::AddHandler( new wxPNGHandler );
 374 #endif
 375
 376 #if wxUSE_LIBJPEG
 377   wxImage::AddHandler( new wxJPEGHandler );
 378 #endif
 379
 380 #if wxUSE_LIBTIFF
 381   wxImage::AddHandler( new wxTIFFHandler );
 382 #endif
 383
 384 #if wxUSE_GIF
 385   wxImage::AddHandler( new wxGIFHandler );
 386 #endif
 387
 388 #if wxUSE_PCX
 389   wxImage::AddHandler( new wxPCXHandler );
 390 #endif
 391
 392 #if wxUSE_PNM
 393   wxImage::AddHandler( new wxPNMHandler );
 394 #endif
 395
 396   wxFrame *frame = new MyFrame();
 397   frame->Show( TRUE );
 398
 399   return TRUE;
 400 }
 401