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The Image sample now does anti-aliasing, oh well.

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Made internal use of OnIdle - er - internal. (I.e.
    it doesn't use EVT_IDLE anymore and thus cannot
    be overridden by users)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1450 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robert Roebling
1999-01-22 18:08:54 +00:00
parent 7c3d7e2d77
commit 9390a202a8
11 changed files with 112 additions and 49 deletions
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65
samples/image/image.cpp
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@@ -34,9 +34,11 @@ public:
MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size );
~MyCanvas();
void OnPaint( wxPaintEvent &event );
void CreateAntiAliasedBitmap();
wxBitmap *my_horse;
wxBitmap *my_square;
wxBitmap *my_anti;
DECLARE_DYNAMIC_CLASS(MyCanvas)
DECLARE_EVENT_TABLE()
@@ -107,12 +109,15 @@ MyCanvas::MyCanvas( wxWindow *parent, const wxWindowID id,
image.LoadFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG );
my_square = new wxBitmap( image.ConvertToBitmap() );
CreateAntiAliasedBitmap();
}
MyCanvas::~MyCanvas()
{
delete my_horse;
delete my_square;
delete my_anti;
}
void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
@@ -120,15 +125,65 @@ 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->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_horse->Ok()) dc.DrawBitmap( *my_horse, 30, 240 );
if (my_horse->Ok()) dc.DrawBitmap( *my_horse, 30, 140 );
if (my_anti->Ok()) dc.DrawBitmap( *my_anti, 250, 140 );
}
void MyCanvas::CreateAntiAliasedBitmap()
{
wxBitmap bitmap( 300, 300 );
wxMemoryDC dc;
dc.SelectObject( bitmap );
dc.SetPen( *wxTRANSPARENT_PEN );
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.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