/*
* Program: image
- *
+ *
* Author: Robert Roebling
*
* Copyright: (C) 1998, Robert Roebling
#include "wx/image.h"
+#include "wx/file.h"
+
// derived classes
class MyFrame;
class MyCanvas: public wxScrolledWindow
{
- DECLARE_DYNAMIC_CLASS(MyCanvas)
-
- public:
-
- MyCanvas(void) {};
+public:
+ MyCanvas() {};
MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
- ~MyCanvas(void);
+ ~MyCanvas();
void OnPaint( wxPaintEvent &event );
-
- wxBitmap *my_horse;
+ void CreateAntiAliasedBitmap();
+
+ wxBitmap *my_horse_png;
+ wxBitmap *my_horse_jpeg;
+ wxBitmap *my_horse_gif;
+ wxBitmap *my_horse_bmp;
wxBitmap *my_square;
-
- DECLARE_EVENT_TABLE()
+ wxBitmap *my_anti;
+
+ DECLARE_DYNAMIC_CLASS(MyCanvas)
+ DECLARE_EVENT_TABLE()
};
// MyFrame
class MyFrame: public wxFrame
{
- DECLARE_DYNAMIC_CLASS(MyFrame)
+public:
+ MyFrame();
- public:
-
- MyFrame(void);
- void OnSize( wxSizeEvent &event );
void OnAbout( wxCommandEvent &event );
void OnQuit( wxCommandEvent &event );
-
+
MyCanvas *m_canvas;
-
- DECLARE_EVENT_TABLE()
+
+ DECLARE_DYNAMIC_CLASS(MyFrame)
+ DECLARE_EVENT_TABLE()
};
// MyApp
class MyApp: public wxApp
{
- public:
-
- MyApp(void);
- virtual bool OnInit(void);
+public:
+ virtual bool OnInit();
};
// main program
IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
-BEGIN_EVENT_TABLE(MyCanvas,wxScrolledWindow)
- EVT_PAINT (MyCanvas::OnPaint)
+BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
+ EVT_PAINT(MyCanvas::OnPaint)
END_EVENT_TABLE()
-MyCanvas::MyCanvas( wxWindow *parent, const wxWindowID id, const wxPoint &pos, const wxSize &size )
- : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
+MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
+ const wxPoint &pos, const wxSize &size )
+ : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
{
+ my_horse_png = (wxBitmap*) NULL;
+ my_horse_jpeg = (wxBitmap*) NULL;
+ my_horse_gif = (wxBitmap*) NULL;
+ my_horse_bmp = (wxBitmap*) NULL;
+ my_square = (wxBitmap*) NULL;
+ my_anti = (wxBitmap*) NULL;
+
SetBackgroundColour(* wxWHITE);
wxBitmap bitmap( 100, 100 );
-
+
wxMemoryDC dc;
dc.SelectObject( bitmap );
dc.SetBrush( wxBrush( "orange", wxSOLID ) );
dc.DrawRectangle( 0, 0, 100, 100 );
dc.SelectObject( wxNullBitmap );
- wxString dir("");
-
-#ifdef __WXGTK__
- dir = wxString("../");
-#endif
+ // try to find the directory with our images
+ wxString dir;
+ if ( wxFile::Exists("./horse.png") )
+ dir = "./";
+ else if ( wxFile::Exists("../horse.png") )
+ dir = "../";
+ else
+ wxLogWarning("Can't find image files in either '.' or '..'!");
wxImage image( bitmap );
- image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG );
- image.LoadFile( dir + wxString("horse.png"), wxBITMAP_TYPE_PNG );
- image.SetRGB( 0, 0, 250, 0, 0 );
- image.SetRGB( 1, 0, 100, 100, 100 );
- image.SetRGB( 2, 0, 250, 250, 250 );
- my_horse = new wxBitmap( image.ConvertToBitmap() );
+ if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG ) )
+ wxLogError("Can't save file");
+
+ if ( !image.LoadFile( dir + wxString("horse.png"), wxBITMAP_TYPE_PNG ) )
+ wxLogError("Can't load PNG image");
+ else
+ my_horse_png = new wxBitmap( image.ConvertToBitmap() );
+
+ if ( !image.LoadFile( dir + wxString("horse.jpg"), wxBITMAP_TYPE_JPEG ) )
+ wxLogError("Can't load JPG image");
+ else
+ my_horse_jpeg = new wxBitmap( image.ConvertToBitmap() );
+
+ if ( !image.LoadFile( dir + wxString("horse.gif"), wxBITMAP_TYPE_GIF ) )
+ wxLogError("Can't load GIF image");
+ else
+ my_horse_gif = new wxBitmap( image.ConvertToBitmap() );
+
+ if ( !image.LoadFile( dir + wxString("horse.bmp"), wxBITMAP_TYPE_BMP ) )
+ wxLogError("Can't load BMP image");
+ else
+ my_horse_bmp = new wxBitmap( image.ConvertToBitmap() );
image.LoadFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG );
my_square = new wxBitmap( image.ConvertToBitmap() );
+
+ CreateAntiAliasedBitmap();
}
-MyCanvas::~MyCanvas(void)
+MyCanvas::~MyCanvas()
{
- delete my_horse;
+ delete my_horse_png;
+ delete my_horse_jpeg;
+ delete my_horse_gif;
+ delete my_horse_bmp;
delete my_square;
+ delete my_anti;
}
void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
wxPaintDC dc( this );
PrepareDC( dc );
- dc.DrawText( "Loaded image", 30, 100 );
- if (my_square->Ok()) dc.DrawBitmap( *my_square, 30, 120 );
+ dc.DrawText( "Loaded image", 30, 10 );
+ if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
- dc.DrawText( "Drawn directly", 150, 100 );
+ dc.DrawText( "Drawn directly", 150, 10 );
dc.SetBrush( wxBrush( "orange", wxSOLID ) );
dc.SetPen( *wxWHITE_PEN );
- dc.DrawRectangle( 150, 120, 100, 100 );
+ dc.DrawRectangle( 150, 30, 100, 100 );
+
+ if (my_anti && my_anti->Ok()) dc.DrawBitmap( *my_anti, 250, 140 );
+
+ dc.DrawText( "PNG handler", 30, 135 );
+ if (my_horse_png && my_horse_png->Ok()) dc.DrawBitmap( *my_horse_png, 30, 150 );
- if (my_horse->Ok()) dc.DrawBitmap( *my_horse, 30, 240 );
+ dc.DrawText( "JPEG handler", 30, 365 );
+ if (my_horse_jpeg && my_horse_jpeg->Ok()) dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
+
+ dc.DrawText( "GIF handler", 30, 595 );
+ if (my_horse_gif && my_horse_gif->Ok()) dc.DrawBitmap( *my_horse_gif, 30, 610 );
+
+ dc.DrawText( "BMP handler", 30, 815 );
+ if (my_horse_bmp && my_horse_bmp->Ok()) dc.DrawBitmap( *my_horse_bmp, 30, 830 );
+}
+
+void MyCanvas::CreateAntiAliasedBitmap()
+{
+ wxBitmap bitmap( 300, 300 );
+
+ wxMemoryDC dc;
+
+ dc.SelectObject( bitmap );
+
+ dc.Clear();
+
+ dc.SetFont( wxFont( 24, wxDECORATIVE, wxDEFAULT, wxDEFAULT ) );
+ dc.SetTextForeground( "RED" );
+ dc.DrawText( "This is anti-aliased Text.", 20, 20 );
+ dc.DrawText( "And a Rectangle.", 20, 60 );
+
+ dc.SetBrush( *wxRED_BRUSH );
+ dc.SetPen( *wxTRANSPARENT_PEN );
+ dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
+
+ wxImage original( bitmap );
+ wxImage anti( 150, 150 );
+
+ /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
+
+ for (int y = 1; y < 149; y++)
+ for (int x = 1; x < 149; x++)
+ {
+ int red = original.GetRed( x*2, y*2 ) +
+ original.GetRed( x*2-1, y*2 ) +
+ original.GetRed( x*2, y*2+1 ) +
+ original.GetRed( x*2+1, y*2+1 );
+ red = red/4;
+
+ int green = original.GetGreen( x*2, y*2 ) +
+ original.GetGreen( x*2-1, y*2 ) +
+ original.GetGreen( x*2, y*2+1 ) +
+ original.GetGreen( x*2+1, y*2+1 );
+ green = green/4;
+
+ int blue = original.GetBlue( x*2, y*2 ) +
+ original.GetBlue( x*2-1, y*2 ) +
+ original.GetBlue( x*2, y*2+1 ) +
+ original.GetBlue( x*2+1, y*2+1 );
+ blue = blue/4;
+ anti.SetRGB( x, y, red, green, blue );
+ }
+ my_anti = new wxBitmap( anti.ConvertToBitmap() );
}
// MyFrame
BEGIN_EVENT_TABLE(MyFrame,wxFrame)
EVT_MENU (ID_ABOUT, MyFrame::OnAbout)
EVT_MENU (ID_QUIT, MyFrame::OnQuit)
- EVT_SIZE (MyFrame::OnSize)
END_EVENT_TABLE()
-MyFrame::MyFrame(void) :
- wxFrame( (wxFrame *) NULL, -1, "wxImage sample", wxPoint(20,20), wxSize(470,360) )
+MyFrame::MyFrame()
+ : wxFrame( (wxFrame *)NULL, -1, "wxImage sample",
+ wxPoint(20,20), wxSize(470,360) )
{
wxMenu *file_menu = new wxMenu();
- file_menu->Append( ID_ABOUT, "About..");
- file_menu->Append( ID_QUIT, "Exit");
-
+ file_menu->Append( ID_ABOUT, "&About..");
+ file_menu->Append( ID_QUIT, "E&xit");
+
wxMenuBar *menu_bar = new wxMenuBar();
- menu_bar->Append(file_menu, "File");
+ menu_bar->Append(file_menu, "&File");
SetMenuBar( menu_bar );
-
+
CreateStatusBar(2);
int widths[] = { -1, 100 };
SetStatusWidths( 2, widths );
-
+
m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
- m_canvas->SetScrollbars( 10, 10, 50, 50 );
+ m_canvas->SetScrollbars( 10, 10, 50, 100 );
}
void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
{
- (void) wxMessageBox( "wxImage demo\nRobert Roebling (c) 1998", "About wxImage Demo", wxOK );
-}
-
-void MyFrame::OnSize( wxSizeEvent &WXUNUSED(event) )
-{
- int w,h;
- GetClientSize( &w, &h );
- if (m_canvas)
- m_canvas->SetSize( w, h );
+ (void)wxMessageBox( "wxImage demo\n"
+ "\n"
+ "Robert Roebling (c) 1998",
+ "About wxImage Demo", wxICON_INFORMATION | wxOK );
}
//-----------------------------------------------------------------------------
// MyApp
//-----------------------------------------------------------------------------
-MyApp::MyApp(void) :
- wxApp( )
-{
-}
-
-bool MyApp::OnInit(void)
+bool MyApp::OnInit()
{
+#if wxUSE_LIBPNG
wxImage::AddHandler( new wxPNGHandler );
-
+#endif
+
+#if wxUSE_LIBJPEG
+ wxImage::AddHandler( new wxJPEGHandler );
+#endif
+
+ wxImage::AddHandler( new wxGIFHandler );
+
wxFrame *frame = new MyFrame();
frame->Show( TRUE );
-
+
return TRUE;
}
projects / wxWidgets.git / blobdiff