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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 // derived classes
24
25 class MyFrame;
26 class MyApp;
27
28 // MyCanvas
29
30 class MyCanvas: public wxScrolledWindow
31 {
32 public:
33 MyCanvas() {};
34 MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
35 ~MyCanvas();
36 void OnPaint( wxPaintEvent &event );
37 void CreateAntiAliasedBitmap();
38
39 wxBitmap *my_horse;
40 wxBitmap *my_square;
41 wxBitmap *my_anti;
42
43 DECLARE_DYNAMIC_CLASS(MyCanvas)
44 DECLARE_EVENT_TABLE()
45 };
46
47 // MyFrame
48
49 class MyFrame: public wxFrame
50 {
51 public:
52 MyFrame();
53
54 void OnAbout( wxCommandEvent &event );
55 void OnQuit( wxCommandEvent &event );
56
57 MyCanvas *m_canvas;
58
59 DECLARE_DYNAMIC_CLASS(MyFrame)
60 DECLARE_EVENT_TABLE()
61 };
62
63 // MyApp
64
65 class MyApp: public wxApp
66 {
67 public:
68 virtual bool OnInit();
69 };
70
71 // main program
72
73 IMPLEMENT_APP(MyApp)
74
75 // MyCanvas
76
77 IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
78
79 BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
80 EVT_PAINT(MyCanvas::OnPaint)
81 END_EVENT_TABLE()
82
83 MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
84 const wxPoint &pos, const wxSize &size )
85 : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
86 {
87 my_horse = (wxBitmap*) NULL;
88 my_square = (wxBitmap*) NULL;
89 my_anti = (wxBitmap*) NULL;
90
91 SetBackgroundColour(* wxWHITE);
92
93 wxBitmap bitmap( 100, 100 );
94
95 wxMemoryDC dc;
96 dc.SelectObject( bitmap );
97 dc.SetBrush( wxBrush( "orange", wxSOLID ) );
98 dc.SetPen( *wxWHITE_PEN );
99 dc.DrawRectangle( 0, 0, 100, 100 );
100 dc.SelectObject( wxNullBitmap );
101
102 wxString dir("");
103
104 #ifdef __WXGTK__
105 dir = wxString("../");
106 #endif
107
108 wxImage image( bitmap );
109 image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG );
110
111 image.LoadFile( dir + wxString("horse.png"), wxBITMAP_TYPE_PNG );
112 my_horse = new wxBitmap( image.ConvertToBitmap() );
113
114 image.LoadFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG );
115 my_square = new wxBitmap( image.ConvertToBitmap() );
116
117 CreateAntiAliasedBitmap();
118 }
119
120 MyCanvas::~MyCanvas()
121 {
122 delete my_horse;
123 delete my_square;
124 delete my_anti;
125 }
126
127 void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
128 {
129 wxPaintDC dc( this );
130 PrepareDC( dc );
131
132 dc.DrawText( "Loaded image", 30, 10 );
133 if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
134
135 dc.DrawText( "Drawn directly", 150, 10 );
136 dc.SetBrush( wxBrush( "orange", wxSOLID ) );
137 dc.SetPen( *wxWHITE_PEN );
138 dc.DrawRectangle( 150, 30, 100, 100 );
139
140 if (my_anti && my_anti->Ok()) dc.DrawBitmap( *my_anti, 250, 140 );
141
142 if (my_horse && my_horse->Ok()) dc.DrawBitmap( *my_horse, 30, 140 );
143 }
144
145 void MyCanvas::CreateAntiAliasedBitmap()
146 {
147 wxBitmap bitmap( 300, 300 );
148
149 wxMemoryDC dc;
150
151 dc.SelectObject( bitmap );
152
153 dc.Clear();
154
155 dc.SetFont( wxFont( 24, wxDECORATIVE, wxDEFAULT, wxDEFAULT ) );
156 dc.SetTextForeground( "RED" );
157 dc.DrawText( "This is anti-aliased Text.", 20, 20 );
158 dc.DrawText( "And a Rectangle.", 20, 60 );
159
160 dc.SetBrush( *wxRED_BRUSH );
161 dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
162
163 wxImage original( bitmap );
164 wxImage anti( 150, 150 );
165
166 /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
167
168 for (int y = 1; y < 149; y++)
169 for (int x = 1; x < 149; x++)
170 {
171 int red = original.GetRed( x*2, y*2 ) +
172 original.GetRed( x*2-1, y*2 ) +
173 original.GetRed( x*2, y*2+1 ) +
174 original.GetRed( x*2+1, y*2+1 );
175 red = red/4;
176
177 int green = original.GetGreen( x*2, y*2 ) +
178 original.GetGreen( x*2-1, y*2 ) +
179 original.GetGreen( x*2, y*2+1 ) +
180 original.GetGreen( x*2+1, y*2+1 );
181 green = green/4;
182
183 int blue = original.GetBlue( x*2, y*2 ) +
184 original.GetBlue( x*2-1, y*2 ) +
185 original.GetBlue( x*2, y*2+1 ) +
186 original.GetBlue( x*2+1, y*2+1 );
187 blue = blue/4;
188 anti.SetRGB( x, y, red, green, blue );
189 }
190 my_anti = new wxBitmap( anti.ConvertToBitmap() );
191 }
192
193 // MyFrame
194
195 const int ID_QUIT = 108;
196 const int ID_ABOUT = 109;
197
198 IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame )
199
200 BEGIN_EVENT_TABLE(MyFrame,wxFrame)
201 EVT_MENU (ID_ABOUT, MyFrame::OnAbout)
202 EVT_MENU (ID_QUIT, MyFrame::OnQuit)
203 END_EVENT_TABLE()
204
205 MyFrame::MyFrame()
206 : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
207 wxPoint(20,20), wxSize(470,360) )
208 {
209 wxMenu *file_menu = new wxMenu();
210 file_menu->Append( ID_ABOUT, "About..");
211 file_menu->Append( ID_QUIT, "Exit");
212
213 wxMenuBar *menu_bar = new wxMenuBar();
214 menu_bar->Append(file_menu, "File");
215
216 SetMenuBar( menu_bar );
217
218 CreateStatusBar(2);
219 int widths[] = { -1, 100 };
220 SetStatusWidths( 2, widths );
221
222 m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
223 m_canvas->SetScrollbars( 10, 10, 50, 50 );
224 }
225
226 void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
227 {
228 Close( TRUE );
229 }
230
231 void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
232 {
233 (void)wxMessageBox( "wxImage demo\n"
234 "Robert Roebling (c) 1998",
235 "About wxImage Demo", wxICON_INFORMATION | wxOK );
236 }
237
238 //-----------------------------------------------------------------------------
239 // MyApp
240 //-----------------------------------------------------------------------------
241
242 bool MyApp::OnInit()
243 {
244 wxFrame *frame = new MyFrame();
245 frame->Show( TRUE );
246
247 return TRUE;
248 }
249