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git.saurik.com Git - wxWidgets.git/blob - samples/image/image.cpp
4 * Author: Robert Roebling
6 * Copyright: (C) 1998, Robert Roebling
10 // For compilers that support precompilation, includes "wx/wx.h".
11 #include "wx/wxprec.h"
32 class MyCanvas
: public wxScrolledWindow
36 MyCanvas( wxWindow
*parent
, wxWindowID
, const wxPoint
&pos
, const wxSize
&size
);
38 void OnPaint( wxPaintEvent
&event
);
39 void CreateAntiAliasedBitmap();
41 wxBitmap
*my_horse_png
;
42 wxBitmap
*my_horse_jpeg
;
43 wxBitmap
*my_horse_gif
;
44 wxBitmap
*my_horse_bmp
;
48 DECLARE_DYNAMIC_CLASS(MyCanvas
)
54 class MyFrame
: public wxFrame
59 void OnAbout( wxCommandEvent
&event
);
60 void OnQuit( wxCommandEvent
&event
);
64 DECLARE_DYNAMIC_CLASS(MyFrame
)
70 class MyApp
: public wxApp
73 virtual bool OnInit();
82 IMPLEMENT_DYNAMIC_CLASS(MyCanvas
, wxScrolledWindow
)
84 BEGIN_EVENT_TABLE(MyCanvas
, wxScrolledWindow
)
85 EVT_PAINT(MyCanvas::OnPaint
)
88 MyCanvas::MyCanvas( wxWindow
*parent
, wxWindowID id
,
89 const wxPoint
&pos
, const wxSize
&size
)
90 : wxScrolledWindow( parent
, id
, pos
, size
, wxSUNKEN_BORDER
)
92 my_horse_png
= (wxBitmap
*) NULL
;
93 my_horse_jpeg
= (wxBitmap
*) NULL
;
94 my_horse_gif
= (wxBitmap
*) NULL
;
95 my_horse_bmp
= (wxBitmap
*) NULL
;
96 my_square
= (wxBitmap
*) NULL
;
97 my_anti
= (wxBitmap
*) NULL
;
99 SetBackgroundColour(* wxWHITE
);
101 wxBitmap
bitmap( 100, 100 );
104 dc
.SelectObject( bitmap
);
105 dc
.SetBrush( wxBrush( "orange", wxSOLID
) );
106 dc
.SetPen( *wxWHITE_PEN
);
107 dc
.DrawRectangle( 0, 0, 100, 100 );
108 dc
.SelectObject( wxNullBitmap
);
110 // try to find the directory with our images
112 if ( wxFile::Exists("./horse.png") )
114 else if ( wxFile::Exists("../horse.png") )
117 wxLogWarning("Can't find image files in either '.' or '..'!");
119 wxImage
image( bitmap
);
120 if ( !image
.SaveFile( dir
+ wxString("test.png"), wxBITMAP_TYPE_PNG
) )
121 wxLogError("Can't save file");
123 if ( !image
.LoadFile( dir
+ wxString("horse.png"), wxBITMAP_TYPE_PNG
) )
124 wxLogError("Can't load PNG image");
126 my_horse_png
= new wxBitmap( image
.ConvertToBitmap() );
128 if ( !image
.LoadFile( dir
+ wxString("horse.jpg"), wxBITMAP_TYPE_JPEG
) )
129 wxLogError("Can't load JPG image");
131 my_horse_jpeg
= new wxBitmap( image
.ConvertToBitmap() );
133 if ( !image
.LoadFile( dir
+ wxString("horse.gif"), wxBITMAP_TYPE_GIF
) )
134 wxLogError("Can't load GIF image");
136 my_horse_gif
= new wxBitmap( image
.ConvertToBitmap() );
138 if ( !image
.LoadFile( dir
+ wxString("horse.bmp"), wxBITMAP_TYPE_BMP
) )
139 wxLogError("Can't load BMP image");
141 my_horse_bmp
= new wxBitmap( image
.ConvertToBitmap() );
143 image
.LoadFile( dir
+ wxString("test.png"), wxBITMAP_TYPE_PNG
);
144 my_square
= new wxBitmap( image
.ConvertToBitmap() );
146 CreateAntiAliasedBitmap();
149 MyCanvas::~MyCanvas()
152 delete my_horse_jpeg
;
159 void MyCanvas::OnPaint( wxPaintEvent
&WXUNUSED(event
) )
161 wxPaintDC
dc( this );
164 dc
.DrawText( "Loaded image", 30, 10 );
165 if (my_square
&& my_square
->Ok()) dc
.DrawBitmap( *my_square
, 30, 30 );
167 dc
.DrawText( "Drawn directly", 150, 10 );
168 dc
.SetBrush( wxBrush( "orange", wxSOLID
) );
169 dc
.SetPen( *wxWHITE_PEN
);
170 dc
.DrawRectangle( 150, 30, 100, 100 );
172 if (my_anti
&& my_anti
->Ok()) dc
.DrawBitmap( *my_anti
, 250, 140 );
174 dc
.DrawText( "PNG handler", 30, 135 );
175 if (my_horse_png
&& my_horse_png
->Ok()) dc
.DrawBitmap( *my_horse_png
, 30, 150 );
177 dc
.DrawText( "JPEG handler", 30, 365 );
178 if (my_horse_jpeg
&& my_horse_jpeg
->Ok()) dc
.DrawBitmap( *my_horse_jpeg
, 30, 380 );
180 dc
.DrawText( "GIF handler", 30, 595 );
181 if (my_horse_gif
&& my_horse_gif
->Ok()) dc
.DrawBitmap( *my_horse_gif
, 30, 610 );
183 dc
.DrawText( "BMP handler", 30, 815 );
184 if (my_horse_bmp
&& my_horse_bmp
->Ok()) dc
.DrawBitmap( *my_horse_bmp
, 30, 830 );
187 void MyCanvas::CreateAntiAliasedBitmap()
189 wxBitmap
bitmap( 300, 300 );
193 dc
.SelectObject( bitmap
);
197 dc
.SetFont( wxFont( 24, wxDECORATIVE
, wxDEFAULT
, wxDEFAULT
) );
198 dc
.SetTextForeground( "RED" );
199 dc
.DrawText( "This is anti-aliased Text.", 20, 20 );
200 dc
.DrawText( "And a Rectangle.", 20, 60 );
202 dc
.SetBrush( *wxRED_BRUSH
);
203 dc
.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
205 wxImage
original( bitmap
);
206 wxImage
anti( 150, 150 );
208 /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
210 for (int y
= 1; y
< 149; y
++)
211 for (int x
= 1; x
< 149; x
++)
213 int red
= original
.GetRed( x
*2, y
*2 ) +
214 original
.GetRed( x
*2-1, y
*2 ) +
215 original
.GetRed( x
*2, y
*2+1 ) +
216 original
.GetRed( x
*2+1, y
*2+1 );
219 int green
= original
.GetGreen( x
*2, y
*2 ) +
220 original
.GetGreen( x
*2-1, y
*2 ) +
221 original
.GetGreen( x
*2, y
*2+1 ) +
222 original
.GetGreen( x
*2+1, y
*2+1 );
225 int blue
= original
.GetBlue( x
*2, y
*2 ) +
226 original
.GetBlue( x
*2-1, y
*2 ) +
227 original
.GetBlue( x
*2, y
*2+1 ) +
228 original
.GetBlue( x
*2+1, y
*2+1 );
230 anti
.SetRGB( x
, y
, red
, green
, blue
);
232 my_anti
= new wxBitmap( anti
.ConvertToBitmap() );
237 const int ID_QUIT
= 108;
238 const int ID_ABOUT
= 109;
240 IMPLEMENT_DYNAMIC_CLASS( MyFrame
, wxFrame
)
242 BEGIN_EVENT_TABLE(MyFrame
,wxFrame
)
243 EVT_MENU (ID_ABOUT
, MyFrame::OnAbout
)
244 EVT_MENU (ID_QUIT
, MyFrame::OnQuit
)
248 : wxFrame( (wxFrame
*)NULL
, -1, "wxImage sample",
249 wxPoint(20,20), wxSize(470,360) )
251 wxMenu
*file_menu
= new wxMenu();
252 file_menu
->Append( ID_ABOUT
, "&About..");
253 file_menu
->Append( ID_QUIT
, "E&xit");
255 wxMenuBar
*menu_bar
= new wxMenuBar();
256 menu_bar
->Append(file_menu
, "&File");
258 SetMenuBar( menu_bar
);
261 int widths
[] = { -1, 100 };
262 SetStatusWidths( 2, widths
);
264 m_canvas
= new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
265 m_canvas
->SetScrollbars( 10, 10, 50, 100 );
268 void MyFrame::OnQuit( wxCommandEvent
&WXUNUSED(event
) )
273 void MyFrame::OnAbout( wxCommandEvent
&WXUNUSED(event
) )
275 (void)wxMessageBox( "wxImage demo\n"
276 "Robert Roebling (c) 1998",
277 "About wxImage Demo", wxICON_INFORMATION
| wxOK
);
280 //-----------------------------------------------------------------------------
282 //-----------------------------------------------------------------------------
287 wxImage::AddHandler( new wxPNGHandler
);
291 wxImage::AddHandler( new wxJPEGHandler
);
294 wxImage::AddHandler( new wxGIFHandler
);
296 wxFrame
*frame
= new MyFrame();