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()) dc.DrawBitmap( *my_anti, 280, 30 );
 216
 217   dc.DrawText( "PNG handler", 30, 135 );
 218   if (my_horse_png && my_horse_png->Ok())
 219   {
 220     dc.DrawBitmap( *my_horse_png, 30, 150 );
 221     wxRect rect(0,0,100,100);
 222     wxBitmap sub( my_horse_png->GetSubBitmap(rect) );
 223     dc.DrawText( "GetSubBitmap()", 280, 190 );
 224     dc.DrawBitmap( sub, 280, 210 );
 225   }
 226
 227   dc.DrawText( "JPEG handler", 30, 365 );
 228   if (my_horse_jpeg && my_horse_jpeg->Ok()) dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
 229
 230   dc.DrawText( "GIF handler", 30, 595 );
 231   if (my_horse_gif && my_horse_gif->Ok()) dc.DrawBitmap( *my_horse_gif, 30, 610 );
 232
 233   dc.DrawText( "PCX handler", 30, 825 );
 234   if (my_horse_pcx && my_horse_pcx->Ok()) dc.DrawBitmap( *my_horse_pcx, 30, 840 );
 235
 236   dc.DrawText( "BMP handler", 30, 1055 );
 237   if (my_horse_bmp && my_horse_bmp->Ok()) dc.DrawBitmap( *my_horse_bmp, 30, 1070 );
 238
 239   dc.DrawText( "PNM handler", 30, 1285 );
 240   if (my_horse_pnm && my_horse_pnm->Ok()) dc.DrawBitmap( *my_horse_pnm, 30, 1300 );
 241
 242   dc.DrawText( "TIFF handler", 30, 1515 );
 243   if (my_horse_tiff && my_horse_tiff->Ok()) dc.DrawBitmap( *my_horse_pnm, 30, 1530 );
 244
 245   dc.DrawText( "XBM bitmap", 30, 1745 );
 246   dc.SetPen( *wxRED_PEN );
 247   if (my_smile_xbm && my_smile_xbm->Ok()) {
 248     dc.DrawBitmap( *my_smile_xbm, 30, 1760 );
 249     dc.DrawText( "..after wxImage conversion", 150, 1745 );
 250     wxImage i( *my_smile_xbm );
 251     dc.DrawBitmap( i.ConvertToBitmap(), 150, 1760 );
 252   }
 253 }
 254
 255 void MyCanvas::CreateAntiAliasedBitmap()
 256 {
 257   wxBitmap bitmap( 300, 300 );
 258
 259   wxMemoryDC dc;
 260
 261   dc.SelectObject( bitmap );
 262
 263   dc.Clear();
 264
 265   dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) );
 266   dc.SetTextForeground( "RED" );
 267   dc.DrawText( "This is anti-aliased Text.", 20, 20 );
 268   dc.DrawText( "And a Rectangle.", 20, 60 );
 269
 270   dc.SetBrush( *wxRED_BRUSH );
 271   dc.SetPen( *wxTRANSPARENT_PEN );
 272   dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
 273
 274   wxImage original( bitmap );
 275   wxImage anti( 150, 150 );
 276
 277   /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
 278
 279   for (int y = 1; y < 149; y++)
 280     for (int x = 1; x < 149; x++)
 281     {
 282        int red = original.GetRed( x*2, y*2 ) +
 283                  original.GetRed( x*2-1, y*2 ) +
 284                  original.GetRed( x*2, y*2+1 ) +
 285                  original.GetRed( x*2+1, y*2+1 );
 286        red = red/4;
 287
 288        int green = original.GetGreen( x*2, y*2 ) +
 289                    original.GetGreen( x*2-1, y*2 ) +
 290                    original.GetGreen( x*2, y*2+1 ) +
 291                    original.GetGreen( x*2+1, y*2+1 );
 292        green = green/4;
 293
 294        int blue = original.GetBlue( x*2, y*2 ) +
 295                   original.GetBlue( x*2-1, y*2 ) +
 296                   original.GetBlue( x*2, y*2+1 ) +
 297                   original.GetBlue( x*2+1, y*2+1 );
 298        blue = blue/4;
 299        anti.SetRGB( x, y, red, green, blue );
 300     }
 301   my_anti = new wxBitmap( anti.ConvertToBitmap() );
 302 }
 303
 304 // MyFrame
 305
 306 const int ID_QUIT  = 108;
 307 const int ID_ABOUT = 109;
 308
 309 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 310
 311 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 312   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 313   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 314 END_EVENT_TABLE()
 315
 316 MyFrame::MyFrame()
 317        : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
 318                   wxPoint(20,20), wxSize(470,360) )
 319 {
 320   wxMenu *file_menu = new wxMenu();
 321   file_menu->Append( ID_ABOUT, "&About..");
 322   file_menu->Append( ID_QUIT, "E&xit");
 323
 324   wxMenuBar *menu_bar = new wxMenuBar();
 325   menu_bar->Append(file_menu, "&File");
 326
 327   SetMenuBar( menu_bar );
 328
 329   CreateStatusBar(2);
 330   int widths[] = { -1, 100 };
 331   SetStatusWidths( 2, widths );
 332
 333   m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
 334
 335   // 500 width * 1900 height
 336   m_canvas->SetScrollbars( 10, 10, 50, 190 );
 337 }
 338
 339 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 340 {
 341   Close( TRUE );
 342 }
 343
 344 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 345 {
 346   (void)wxMessageBox( "wxImage demo\n"
 347                       "\n"
 348                       "Robert Roebling (c) 1998",
 349                       "About wxImage Demo", wxICON_INFORMATION | wxOK );
 350 }
 351
 352 //-----------------------------------------------------------------------------
 353 // MyApp
 354 //-----------------------------------------------------------------------------
 355
 356 bool MyApp::OnInit()
 357 {
 358 #if wxUSE_LIBPNG
 359   wxImage::AddHandler( new wxPNGHandler );
 360 #endif
 361
 362 #if wxUSE_LIBJPEG
 363   wxImage::AddHandler( new wxJPEGHandler );
 364 #endif
 365
 366 #if wxUSE_LIBTIFF
 367   wxImage::AddHandler( new wxTIFFHandler );
 368 #endif
 369
 370 #if wxUSE_GIF
 371   wxImage::AddHandler( new wxGIFHandler );
 372 #endif
 373
 374 #if wxUSE_PCX
 375   wxImage::AddHandler( new wxPCXHandler );
 376 #endif
 377
 378 #if wxUSE_PNM
 379   wxImage::AddHandler( new wxPNMHandler );
 380 #endif
 381
 382   wxFrame *frame = new MyFrame();
 383   frame->Show( TRUE );
 384
 385   return TRUE;
 386 }
 387