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( *wxBLACK_PEN );
 119     dc.DrawRectangle( 0, 0, 100, 100 );
 120     dc.SetBrush( *wxWHITE_BRUSH );
 121     dc.DrawRectangle( 20, 20, 60, 60 );
 122     dc.SelectObject( wxNullBitmap );
 123
 124     // try to find the directory with our images
 125     wxString dir;
 126     if ( wxFile::Exists("./horse.png") )
 127         dir = "./";
 128     else if ( wxFile::Exists("../horse.png") )
 129         dir = "../";
 130     else
 131         wxLogWarning("Can't find image files in either '.' or '..'!");
 132
 133     wxImage image( bitmap );
 134
 135     if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG ) )
 136         wxLogError("Can't save file");
 137
 138     if ( !image.LoadFile( dir + wxString("horse.png"), wxBITMAP_TYPE_PNG ) )
 139         wxLogError("Can't load PNG image");
 140     else
 141         my_horse_png = new wxBitmap( image.ConvertToBitmap() );
 142
 143     if ( !image.LoadFile( dir + wxString("horse.jpg") ) )
 144         wxLogError("Can't load JPG image");
 145     else
 146         my_horse_jpeg = new wxBitmap( image.ConvertToBitmap() );
 147
 148 #if wxUSE_GIF
 149     if ( !image.LoadFile( dir + wxString("horse.gif") ) )
 150         wxLogError("Can't load GIF image");
 151     else
 152         my_horse_gif = new wxBitmap( image.ConvertToBitmap() );
 153 #endif
 154
 155 #if wxUSE_PCX
 156     if ( !image.LoadFile( dir + wxString("horse.pcx"), wxBITMAP_TYPE_PCX ) )
 157         wxLogError("Can't load PCX image");
 158     else
 159         my_horse_pcx = new wxBitmap( image.ConvertToBitmap() );
 160 #endif
 161
 162     if ( !image.LoadFile( dir + wxString("horse.bmp"), wxBITMAP_TYPE_BMP ) )
 163         wxLogError("Can't load BMP image");
 164     else
 165         my_horse_bmp = new wxBitmap( image.ConvertToBitmap() );
 166
 167 #if wxUSE_PNM
 168     if ( !image.LoadFile( dir + wxString("horse.pnm"), wxBITMAP_TYPE_PNM ) )
 169         wxLogError("Can't load PNM image");
 170     else
 171         my_horse_pnm = new wxBitmap( image.ConvertToBitmap() );
 172 #endif
 173
 174 #if wxUSE_LIBTIFF
 175     if ( !image.LoadFile( dir + wxString("horse.tif"), wxBITMAP_TYPE_TIF ) )
 176         wxLogError("Can't load TIFF image");
 177     else
 178         my_horse_tiff = new wxBitmap( image.ConvertToBitmap() );
 179 #endif
 180
 181     image.LoadFile( dir + wxString("test.png") );
 182     my_square = new wxBitmap( image.ConvertToBitmap() );
 183
 184     CreateAntiAliasedBitmap();
 185
 186     my_smile_xbm = new wxBitmap( (const char*)smile_bits, smile_width,
 187                                  smile_height, 1 );
 188 }
 189
 190 MyCanvas::~MyCanvas()
 191 {
 192     delete my_horse_pnm;
 193     delete my_horse_png;
 194     delete my_horse_jpeg;
 195     delete my_horse_gif;
 196     delete my_horse_bmp;
 197     delete my_horse_pcx;
 198     delete my_horse_tiff;
 199     delete my_smile_xbm;
 200     delete my_square;
 201     delete my_anti;
 202 }
 203
 204 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
 205 {
 206     wxPaintDC dc( this );
 207     PrepareDC( dc );
 208
 209     dc.DrawText( "Loaded image", 30, 10 );
 210     if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
 211
 212     dc.DrawText( "Drawn directly", 150, 10 );
 213     dc.SetBrush( wxBrush( "orange", wxSOLID ) );
 214     dc.SetPen( *wxBLACK_PEN );
 215     dc.DrawRectangle( 150, 30, 100, 100 );
 216     dc.SetBrush( *wxWHITE_BRUSH );
 217     dc.DrawRectangle( 170, 50, 60, 60 );
 218
 219     if (my_anti && my_anti->Ok())
 220         dc.DrawBitmap( *my_anti, 280, 30 );
 221
 222     dc.DrawText( "PNG handler", 30, 135 );
 223     if (my_horse_png && my_horse_png->Ok())
 224     {
 225         dc.DrawBitmap( *my_horse_png, 30, 150 );
 226         wxRect rect(0,0,100,100);
 227         wxBitmap sub( my_horse_png->GetSubBitmap(rect) );
 228         dc.DrawText( "GetSubBitmap()", 280, 190 );
 229         dc.DrawBitmap( sub, 280, 210 );
 230     }
 231
 232     dc.DrawText( "JPEG handler", 30, 365 );
 233     if (my_horse_jpeg && my_horse_jpeg->Ok())
 234         dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
 235
 236     dc.DrawText( "GIF handler", 30, 595 );
 237     if (my_horse_gif && my_horse_gif->Ok())
 238         dc.DrawBitmap( *my_horse_gif, 30, 610 );
 239
 240     dc.DrawText( "PCX handler", 30, 825 );
 241     if (my_horse_pcx && my_horse_pcx->Ok())
 242         dc.DrawBitmap( *my_horse_pcx, 30, 840 );
 243
 244     dc.DrawText( "BMP handler", 30, 1055 );
 245     if (my_horse_bmp && my_horse_bmp->Ok())
 246         dc.DrawBitmap( *my_horse_bmp, 30, 1070 );
 247
 248     dc.DrawText( "PNM handler", 30, 1285 );
 249     if (my_horse_pnm && my_horse_pnm->Ok())
 250         dc.DrawBitmap( *my_horse_pnm, 30, 1300 );
 251
 252     dc.DrawText( "TIFF handler", 30, 1515 );
 253     if (my_horse_tiff && my_horse_tiff->Ok())
 254         dc.DrawBitmap( *my_horse_tiff, 30, 1530 );
 255
 256     if (my_smile_xbm && my_smile_xbm->Ok())
 257     {
 258         dc.DrawText( "XBM bitmap", 30, 1745 );
 259         dc.SetTextForeground( "RED" );
 260         dc.SetTextBackground( "GREEN" );
 261         dc.DrawBitmap( *my_smile_xbm, 30, 1760 );
 262
 263         dc.DrawText( "After wxImage conversion", 150, 1745 );
 264         wxImage i( *my_smile_xbm );
 265         i.SetMaskColour( 0,0,0 );
 266         i.Replace( 255,255,255,
 267                wxRED_PEN->GetColour().Red(),
 268                wxRED_PEN->GetColour().Green(),
 269                wxRED_PEN->GetColour().Blue() );
 270         dc.DrawBitmap( i.ConvertToBitmap(), 150, 1760, TRUE );
 271     }
 272     dc.SetTextForeground( "BLACK" );
 273
 274     wxBitmap mono( 60,50,1 );
 275     wxMemoryDC memdc;
 276     memdc.SelectObject( mono );
 277     memdc.SetPen( *wxTRANSPARENT_PEN );
 278     memdc.SetBrush( *wxWHITE_BRUSH );
 279     memdc.DrawRectangle( 0,0,60,50 );
 280     memdc.SetTextForeground( *wxBLACK );
 281     memdc.DrawText( "Hi!", 5, 5 );
 282     memdc.SetBrush( *wxBLACK_BRUSH );
 283     memdc.DrawRectangle( 33,5,20,20 );
 284     memdc.SetPen( *wxRED_PEN );
 285     memdc.DrawLine( 5, 42, 50, 42 );
 286     memdc.SelectObject( wxNullBitmap );
 287     if (mono.Ok())
 288     {
 289         dc.DrawText( "Mono bitmap", 30, 1845 );
 290         dc.SetTextForeground( "RED" );
 291         dc.SetTextBackground( "GREEN" );
 292         dc.DrawBitmap( mono, 30, 1860 );
 293
 294         dc.DrawText( "After wxImage conversion", 150, 1845 );
 295         wxImage i( mono );
 296         i.SetMaskColour( 255,255,255 );
 297         i.Replace( 0,0,0,
 298                wxRED_PEN->GetColour().Red(),
 299                wxRED_PEN->GetColour().Green(),
 300                wxRED_PEN->GetColour().Blue() );
 301         dc.DrawBitmap( i.ConvertToBitmap(), 150, 1860, TRUE );
 302     }
 303 }
 304
 305 void MyCanvas::CreateAntiAliasedBitmap()
 306 {
 307   wxBitmap bitmap( 300, 300 );
 308
 309   wxMemoryDC dc;
 310
 311   dc.SelectObject( bitmap );
 312
 313   dc.Clear();
 314
 315   dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) );
 316   dc.SetTextForeground( "RED" );
 317   dc.DrawText( "This is anti-aliased Text.", 20, 20 );
 318   dc.DrawText( "And a Rectangle.", 20, 60 );
 319
 320   dc.SetBrush( *wxRED_BRUSH );
 321   dc.SetPen( *wxTRANSPARENT_PEN );
 322   dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
 323
 324   wxImage original( bitmap );
 325   wxImage anti( 150, 150 );
 326
 327   /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
 328
 329   for (int y = 1; y < 149; y++)
 330     for (int x = 1; x < 149; x++)
 331     {
 332        int red = original.GetRed( x*2, y*2 ) +
 333                  original.GetRed( x*2-1, y*2 ) +
 334                  original.GetRed( x*2, y*2+1 ) +
 335                  original.GetRed( x*2+1, y*2+1 );
 336        red = red/4;
 337
 338        int green = original.GetGreen( x*2, y*2 ) +
 339                    original.GetGreen( x*2-1, y*2 ) +
 340                    original.GetGreen( x*2, y*2+1 ) +
 341                    original.GetGreen( x*2+1, y*2+1 );
 342        green = green/4;
 343
 344        int blue = original.GetBlue( x*2, y*2 ) +
 345                   original.GetBlue( x*2-1, y*2 ) +
 346                   original.GetBlue( x*2, y*2+1 ) +
 347                   original.GetBlue( x*2+1, y*2+1 );
 348        blue = blue/4;
 349        anti.SetRGB( x, y, red, green, blue );
 350     }
 351   my_anti = new wxBitmap( anti.ConvertToBitmap() );
 352 }
 353
 354 // MyFrame
 355
 356 const int ID_QUIT  = 108;
 357 const int ID_ABOUT = 109;
 358
 359 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
 360
 361 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
 362   EVT_MENU    (ID_ABOUT, MyFrame::OnAbout)
 363   EVT_MENU    (ID_QUIT,  MyFrame::OnQuit)
 364 END_EVENT_TABLE()
 365
 366 MyFrame::MyFrame()
 367        : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
 368                   wxPoint(20,20), wxSize(470,360) )
 369 {
 370   wxMenu *file_menu = new wxMenu();
 371   file_menu->Append( ID_ABOUT, "&About..");
 372   file_menu->Append( ID_QUIT, "E&xit");
 373
 374   wxMenuBar *menu_bar = new wxMenuBar();
 375   menu_bar->Append(file_menu, "&File");
 376
 377   SetMenuBar( menu_bar );
 378
 379   CreateStatusBar(2);
 380   int widths[] = { -1, 100 };
 381   SetStatusWidths( 2, widths );
 382
 383   m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
 384
 385   // 500 width * 1900 height
 386   m_canvas->SetScrollbars( 10, 10, 50, 200 );
 387 }
 388
 389 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
 390 {
 391   Close( TRUE );
 392 }
 393
 394 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
 395 {
 396   (void)wxMessageBox( "wxImage demo\n"
 397                       "Robert Roebling (c) 1998,2000",
 398                       "About wxImage Demo", wxICON_INFORMATION | wxOK );
 399 }
 400
 401 //-----------------------------------------------------------------------------
 402 // MyApp
 403 //-----------------------------------------------------------------------------
 404
 405 bool MyApp::OnInit()
 406 {
 407 #if wxUSE_LIBPNG
 408   wxImage::AddHandler( new wxPNGHandler );
 409 #endif
 410
 411 #if wxUSE_LIBJPEG
 412   wxImage::AddHandler( new wxJPEGHandler );
 413 #endif
 414
 415 #if wxUSE_LIBTIFF
 416   wxImage::AddHandler( new wxTIFFHandler );
 417 #endif
 418
 419 #if wxUSE_GIF
 420   wxImage::AddHandler( new wxGIFHandler );
 421 #endif
 422
 423 #if wxUSE_PCX
 424   wxImage::AddHandler( new wxPCXHandler );
 425 #endif
 426
 427 #if wxUSE_PNM
 428   wxImage::AddHandler( new wxPNMHandler );
 429 #endif
 430
 431   wxFrame *frame = new MyFrame();
 432   frame->Show( TRUE );
 433
 434   return TRUE;
 435 }
 436