#include "wx/image.h"
+#include "wx/file.h"
+
// derived classes
class MyFrame;
MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
~MyCanvas();
void OnPaint( wxPaintEvent &event );
+ void CreateAntiAliasedBitmap();
- wxBitmap *my_horse;
+ wxBitmap *my_horse_png;
+ wxBitmap *my_horse_jpeg;
+ wxBitmap *my_horse_gif;
+ wxBitmap *my_horse_bmp;
wxBitmap *my_square;
+ wxBitmap *my_anti;
DECLARE_DYNAMIC_CLASS(MyCanvas)
DECLARE_EVENT_TABLE()
EVT_PAINT(MyCanvas::OnPaint)
END_EVENT_TABLE()
-MyCanvas::MyCanvas( wxWindow *parent, const wxWindowID id,
+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 );
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 );
- 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()
{
- 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( "Drawn directly", 150, 100 );
+ dc.DrawText( "Loaded image", 30, 10 );
+ if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
+
+ 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 );
+
+ 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 );
- if (my_horse->Ok()) dc.DrawBitmap( *my_horse, 30, 240 );
+ /* 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
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 );
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\n"
+ "\n"
"Robert Roebling (c) 1998",
"About wxImage Demo", wxICON_INFORMATION | wxOK );
}
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 );
projects / wxWidgets.git / blobdiff