de91443612
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73091 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
710 lines
20 KiB
C++
710 lines
20 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: samples/image/canvas.cpp
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// Purpose: sample showing operations with wxImage
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// Author: Robert Roebling
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// Modified by: Francesco Montorsi
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// Created: 1998
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// RCS-ID: $Id$
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// Copyright: (c) 1998-2005 Robert Roebling
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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// For compilers that support precompilation, includes "wx/wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#include "wx/wx.h"
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#endif
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#include "wx/image.h"
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#include "wx/file.h"
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#include "wx/filename.h"
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#include "wx/mstream.h"
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#include "wx/wfstream.h"
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#include "wx/quantize.h"
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#include "wx/stopwatch.h"
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#if wxUSE_CLIPBOARD
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#include "wx/dataobj.h"
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#include "wx/clipbrd.h"
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#endif // wxUSE_CLIPBOARD
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#include "smile.xbm"
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#include "smile.xpm"
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#include "cursor_png.c"
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#include "canvas.h"
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//-----------------------------------------------------------------------------
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// MyCanvas
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//-----------------------------------------------------------------------------
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BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
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EVT_PAINT(MyCanvas::OnPaint)
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END_EVENT_TABLE()
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MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id,
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const wxPoint &pos, const wxSize &size )
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: wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER )
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, m_bmpSmileXpm(smile_xpm)
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, m_iconSmileXpm(smile_xpm)
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{
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my_horse_ani = NULL;
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m_ani_images = 0 ;
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SetBackgroundColour(* wxWHITE);
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wxBitmap bitmap( 100, 100 );
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wxMemoryDC dc;
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dc.SelectObject( bitmap );
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dc.SetBrush( wxBrush( wxS("orange") ) );
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dc.SetPen( *wxBLACK_PEN );
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dc.DrawRectangle( 0, 0, 100, 100 );
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dc.SetBrush( *wxWHITE_BRUSH );
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dc.DrawRectangle( 20, 20, 60, 60 );
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dc.SelectObject( wxNullBitmap );
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// try to find the directory with our images
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wxString dir;
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if ( wxFile::Exists(wxT("./horse.png")) )
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dir = wxT("./");
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else if ( wxFile::Exists(wxT("../horse.png")) )
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dir = wxT("../");
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else
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wxLogWarning(wxT("Can't find image files in either '.' or '..'!"));
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wxImage image = bitmap.ConvertToImage();
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#if wxUSE_LIBPNG
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if ( !image.SaveFile( dir + wxT("test.png"), wxBITMAP_TYPE_PNG ))
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{
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wxLogError(wxT("Can't save file"));
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}
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image.Destroy();
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if ( image.LoadFile( dir + wxT("test.png") ) )
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my_square = wxBitmap( image );
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.png")) )
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{
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wxLogError(wxT("Can't load PNG image"));
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}
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else
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{
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my_horse_png = wxBitmap( image );
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}
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if ( !image.LoadFile( dir + wxT("toucan.png")) )
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{
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wxLogError(wxT("Can't load PNG image"));
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}
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else
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{
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my_toucan = wxBitmap(image);
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}
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my_toucan_flipped_horiz = wxBitmap(image.Mirror(true));
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my_toucan_flipped_vert = wxBitmap(image.Mirror(false));
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my_toucan_flipped_both = wxBitmap(image.Mirror(true).Mirror(false));
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my_toucan_grey = wxBitmap(image.ConvertToGreyscale());
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my_toucan_head = wxBitmap(image.GetSubImage(wxRect(40, 7, 80, 60)));
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my_toucan_scaled_normal = wxBitmap(image.Scale(110,90,wxIMAGE_QUALITY_NORMAL));
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my_toucan_scaled_high = wxBitmap(image.Scale(110,90,wxIMAGE_QUALITY_HIGH));
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my_toucan_blur = wxBitmap(image.Blur(10));
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#endif // wxUSE_LIBPNG
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#if wxUSE_LIBJPEG
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.jpg")) )
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{
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wxLogError(wxT("Can't load JPG image"));
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}
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else
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{
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my_horse_jpeg = wxBitmap( image );
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// Colorize by rotating green hue to red
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wxImage::HSVValue greenHSV = wxImage::RGBtoHSV(wxImage::RGBValue(0, 255, 0));
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wxImage::HSVValue redHSV = wxImage::RGBtoHSV(wxImage::RGBValue(255, 0, 0));
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image.RotateHue(redHSV.hue - greenHSV.hue);
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colorized_horse_jpeg = wxBitmap( image );
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}
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if ( !image.LoadFile( dir + wxT("cmyk.jpg")) )
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{
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wxLogError(wxT("Can't load CMYK JPG image"));
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}
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else
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{
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my_cmyk_jpeg = wxBitmap(image);
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}
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#endif // wxUSE_LIBJPEG
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#if wxUSE_GIF
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.gif" )) )
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{
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wxLogError(wxT("Can't load GIF image"));
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}
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else
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{
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my_horse_gif = wxBitmap( image );
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}
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#endif
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#if wxUSE_PCX
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.pcx"), wxBITMAP_TYPE_PCX ) )
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{
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wxLogError(wxT("Can't load PCX image"));
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}
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else
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{
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my_horse_pcx = wxBitmap( image );
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}
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#endif
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.bmp"), wxBITMAP_TYPE_BMP ) )
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{
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wxLogError(wxT("Can't load BMP image"));
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}
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else
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{
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my_horse_bmp = wxBitmap( image );
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}
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#if wxUSE_XPM
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.xpm"), wxBITMAP_TYPE_XPM ) )
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{
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wxLogError(wxT("Can't load XPM image"));
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}
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else
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{
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my_horse_xpm = wxBitmap( image );
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}
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if ( !image.SaveFile( dir + wxT("test.xpm"), wxBITMAP_TYPE_XPM ))
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{
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wxLogError(wxT("Can't save file"));
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}
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#endif
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#if wxUSE_PNM
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.pnm"), wxBITMAP_TYPE_PNM ) )
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{
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wxLogError(wxT("Can't load PNM image"));
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}
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else
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{
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my_horse_pnm = wxBitmap( image );
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}
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse_ag.pnm"), wxBITMAP_TYPE_PNM ) )
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{
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wxLogError(wxT("Can't load PNM image"));
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}
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else
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{
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my_horse_asciigrey_pnm = wxBitmap( image );
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}
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse_rg.pnm"), wxBITMAP_TYPE_PNM ) )
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{
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wxLogError(wxT("Can't load PNM image"));
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}
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else
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{
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my_horse_rawgrey_pnm = wxBitmap( image );
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}
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#endif
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#if wxUSE_LIBTIFF
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.tif"), wxBITMAP_TYPE_TIFF ) )
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{
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wxLogError(wxT("Can't load TIFF image"));
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}
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else
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{
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my_horse_tiff = wxBitmap( image );
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}
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#endif
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#if wxUSE_LIBTIFF
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.tga"), wxBITMAP_TYPE_TGA ) )
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{
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wxLogError(wxT("Can't load TGA image"));
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}
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else
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{
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my_horse_tga = wxBitmap( image );
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}
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#endif
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CreateAntiAliasedBitmap();
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my_smile_xbm = wxBitmap( (const char*)smile_bits, smile_width,
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smile_height, 1 );
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// demonstrates XPM automatically using the mask when saving
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if ( m_bmpSmileXpm.IsOk() )
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m_bmpSmileXpm.SaveFile(wxT("saved.xpm"), wxBITMAP_TYPE_XPM);
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#if wxUSE_ICO_CUR
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.ico"), wxBITMAP_TYPE_ICO, 0 ) )
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{
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wxLogError(wxT("Can't load first ICO image"));
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}
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else
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{
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my_horse_ico32 = wxBitmap( image );
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}
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.ico"), wxBITMAP_TYPE_ICO, 1 ) )
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{
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wxLogError(wxT("Can't load second ICO image"));
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}
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else
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{
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my_horse_ico16 = wxBitmap( image );
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}
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.ico") ) )
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{
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wxLogError(wxT("Can't load best ICO image"));
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}
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else
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{
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my_horse_ico = wxBitmap( image );
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}
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image.Destroy();
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if ( !image.LoadFile( dir + wxT("horse.cur"), wxBITMAP_TYPE_CUR ) )
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{
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wxLogError(wxT("Can't load best ICO image"));
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}
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else
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{
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my_horse_cur = wxBitmap( image );
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xH = 30 + image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X) ;
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yH = 2420 + image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ;
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}
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m_ani_images = wxImage::GetImageCount ( dir + wxT("horse3.ani"), wxBITMAP_TYPE_ANI );
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if (m_ani_images==0)
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{
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wxLogError(wxT("No ANI-format images found"));
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}
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else
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{
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my_horse_ani = new wxBitmap [m_ani_images];
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}
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int i;
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for (i=0; i < m_ani_images; i++)
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{
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image.Destroy();
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if (!image.LoadFile( dir + wxT("horse3.ani"), wxBITMAP_TYPE_ANI, i ))
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{
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wxString tmp = wxT("Can't load image number ");
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tmp << i ;
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wxLogError(tmp);
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}
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else
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my_horse_ani [i] = wxBitmap( image );
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}
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#endif // wxUSE_ICO_CUR
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image.Destroy();
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// test image loading from stream
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wxFile file(dir + wxT("horse.bmp"));
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if ( file.IsOpened() )
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{
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wxFileOffset len = file.Length();
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size_t dataSize = (size_t)len;
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void *data = malloc(dataSize);
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if ( file.Read(data, dataSize) != len )
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{
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wxLogError(wxT("Reading bitmap file failed"));
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}
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else
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{
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wxMemoryInputStream mis(data, dataSize);
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if ( !image.LoadFile(mis) )
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{
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wxLogError(wxT("Can't load BMP image from stream"));
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}
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else
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{
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my_horse_bmp2 = wxBitmap( image );
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}
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}
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free(data);
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}
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// This macro loads PNG from either resources on the platforms that support
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// this (Windows and OS X) or from in-memory data (coming from cursor_png.c
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// included above in our case).
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my_png_from_res = wxBITMAP_PNG(cursor);
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// This one always loads PNG from memory but exists for consistency with
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// the above one and also because it frees you from the need to specify the
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// length explicitly, without it you'd have to do it and also spell the
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// array name in full, like this:
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//
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// my_png_from_mem = wxBitmap::NewFromPNGData(cursor_png, WXSIZEOF(cursor_png));
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my_png_from_mem = wxBITMAP_PNG_FROM_DATA(cursor);
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}
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MyCanvas::~MyCanvas()
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{
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delete [] my_horse_ani;
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}
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void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
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{
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wxPaintDC dc( this );
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PrepareDC( dc );
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dc.DrawText( wxT("Loaded image"), 30, 10 );
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if (my_square.IsOk())
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dc.DrawBitmap( my_square, 30, 30 );
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dc.DrawText( wxT("Drawn directly"), 150, 10 );
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dc.SetBrush( wxBrush( wxS("orange") ) );
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dc.SetPen( *wxBLACK_PEN );
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dc.DrawRectangle( 150, 30, 100, 100 );
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dc.SetBrush( *wxWHITE_BRUSH );
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dc.DrawRectangle( 170, 50, 60, 60 );
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if (my_anti.IsOk())
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dc.DrawBitmap( my_anti, 280, 30 );
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dc.DrawText( wxT("PNG handler"), 30, 135 );
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if (my_horse_png.IsOk())
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{
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dc.DrawBitmap( my_horse_png, 30, 150 );
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wxRect rect(0,0,100,100);
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wxBitmap sub( my_horse_png.GetSubBitmap(rect) );
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dc.DrawText( wxT("GetSubBitmap()"), 280, 175 );
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dc.DrawBitmap( sub, 280, 195 );
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}
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dc.DrawText( wxT("JPEG handler"), 30, 365 );
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if (my_horse_jpeg.IsOk())
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dc.DrawBitmap( my_horse_jpeg, 30, 380 );
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dc.DrawText( wxT("Green rotated to red"), 280, 365 );
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if (colorized_horse_jpeg.IsOk())
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dc.DrawBitmap( colorized_horse_jpeg, 280, 380 );
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dc.DrawText( wxT("CMYK JPEG image"), 530, 365 );
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if (my_cmyk_jpeg.IsOk())
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dc.DrawBitmap( my_cmyk_jpeg, 530, 380 );
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dc.DrawText( wxT("GIF handler"), 30, 595 );
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if (my_horse_gif.IsOk())
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dc.DrawBitmap( my_horse_gif, 30, 610 );
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dc.DrawText( wxT("PCX handler"), 30, 825 );
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if (my_horse_pcx.IsOk())
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dc.DrawBitmap( my_horse_pcx, 30, 840 );
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dc.DrawText( wxT("BMP handler"), 30, 1055 );
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if (my_horse_bmp.IsOk())
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dc.DrawBitmap( my_horse_bmp, 30, 1070 );
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dc.DrawText( wxT("BMP read from memory"), 280, 1055 );
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if (my_horse_bmp2.IsOk())
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dc.DrawBitmap( my_horse_bmp2, 280, 1070 );
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dc.DrawText( wxT("PNM handler"), 30, 1285 );
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if (my_horse_pnm.IsOk())
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dc.DrawBitmap( my_horse_pnm, 30, 1300 );
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dc.DrawText( wxT("PNM handler (ascii grey)"), 280, 1285 );
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if (my_horse_asciigrey_pnm.IsOk())
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dc.DrawBitmap( my_horse_asciigrey_pnm, 280, 1300 );
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dc.DrawText( wxT("PNM handler (raw grey)"), 530, 1285 );
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if (my_horse_rawgrey_pnm.IsOk())
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dc.DrawBitmap( my_horse_rawgrey_pnm, 530, 1300 );
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dc.DrawText( wxT("TIFF handler"), 30, 1515 );
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if (my_horse_tiff.IsOk())
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dc.DrawBitmap( my_horse_tiff, 30, 1530 );
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dc.DrawText( wxT("TGA handler"), 30, 1745 );
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if (my_horse_tga.IsOk())
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dc.DrawBitmap( my_horse_tga, 30, 1760 );
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dc.DrawText( wxT("XPM handler"), 30, 1975 );
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if (my_horse_xpm.IsOk())
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dc.DrawBitmap( my_horse_xpm, 30, 2000 );
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// toucans
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{
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int x = 750, y = 10, yy = 170;
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dc.DrawText(wxT("Original toucan"), x+50, y);
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dc.DrawBitmap(my_toucan, x, y+15, true);
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y += yy;
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dc.DrawText(wxT("Flipped horizontally"), x+50, y);
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dc.DrawBitmap(my_toucan_flipped_horiz, x, y+15, true);
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y += yy;
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dc.DrawText(wxT("Flipped vertically"), x+50, y);
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dc.DrawBitmap(my_toucan_flipped_vert, x, y+15, true);
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y += yy;
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dc.DrawText(wxT("Flipped both h&v"), x+50, y);
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dc.DrawBitmap(my_toucan_flipped_both, x, y+15, true);
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y += yy;
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dc.DrawText(wxT("In greyscale"), x+50, y);
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dc.DrawBitmap(my_toucan_grey, x, y+15, true);
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y += yy;
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dc.DrawText(wxT("Toucan's head"), x+50, y);
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dc.DrawBitmap(my_toucan_head, x, y+15, true);
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y += yy;
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dc.DrawText(wxT("Scaled with normal quality"), x+50, y);
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dc.DrawBitmap(my_toucan_scaled_normal, x, y+15, true);
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y += yy;
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dc.DrawText(wxT("Scaled with high quality"), x+50, y);
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dc.DrawBitmap(my_toucan_scaled_high, x, y+15, true);
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y += yy;
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dc.DrawText(wxT("Blured"), x+50, y);
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dc.DrawBitmap(my_toucan_blur, x, y+15, true);
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}
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if (my_smile_xbm.IsOk())
|
|
{
|
|
int x = 300, y = 1800;
|
|
|
|
dc.DrawText( wxT("XBM bitmap"), x, y );
|
|
dc.DrawText( wxT("(green on red)"), x, y + 15 );
|
|
dc.SetTextForeground( wxT("GREEN") );
|
|
dc.SetTextBackground( wxT("RED") );
|
|
dc.DrawBitmap( my_smile_xbm, x, y + 30 );
|
|
|
|
dc.SetTextForeground( *wxBLACK );
|
|
dc.DrawText( wxT("After wxImage conversion"), x + 120, y );
|
|
dc.DrawText( wxT("(red on white)"), x + 120, y + 15 );
|
|
dc.SetTextForeground( wxT("RED") );
|
|
wxImage i = my_smile_xbm.ConvertToImage();
|
|
i.SetMaskColour( 255, 255, 255 );
|
|
i.Replace( 0, 0, 0,
|
|
wxRED_PEN->GetColour().Red(),
|
|
wxRED_PEN->GetColour().Green(),
|
|
wxRED_PEN->GetColour().Blue() );
|
|
dc.DrawBitmap( wxBitmap(i), x + 120, y + 30, true );
|
|
dc.SetTextForeground( *wxBLACK );
|
|
}
|
|
|
|
|
|
wxBitmap mono( 60,50,1 );
|
|
wxMemoryDC memdc;
|
|
memdc.SelectObject( mono );
|
|
memdc.SetPen( *wxBLACK_PEN );
|
|
memdc.SetBrush( *wxWHITE_BRUSH );
|
|
memdc.DrawRectangle( 0,0,60,50 );
|
|
memdc.SetTextForeground( *wxBLACK );
|
|
#ifndef __WXGTK20__
|
|
// I cannot convince GTK2 to draw into mono bitmaps
|
|
memdc.DrawText( wxT("Hi!"), 5, 5 );
|
|
#endif
|
|
memdc.SetBrush( *wxBLACK_BRUSH );
|
|
memdc.DrawRectangle( 33,5,20,20 );
|
|
memdc.SetPen( *wxRED_PEN );
|
|
memdc.DrawLine( 5, 42, 50, 42 );
|
|
memdc.SelectObject( wxNullBitmap );
|
|
|
|
if (mono.IsOk())
|
|
{
|
|
int x = 300, y = 1900;
|
|
|
|
dc.DrawText( wxT("Mono bitmap"), x, y );
|
|
dc.DrawText( wxT("(red on green)"), x, y + 15 );
|
|
dc.SetTextForeground( wxT("RED") );
|
|
dc.SetTextBackground( wxT("GREEN") );
|
|
dc.DrawBitmap( mono, x, y + 30 );
|
|
|
|
dc.SetTextForeground( *wxBLACK );
|
|
dc.DrawText( wxT("After wxImage conversion"), x + 120, y );
|
|
dc.DrawText( wxT("(red on white)"), x + 120, y + 15 );
|
|
dc.SetTextForeground( wxT("RED") );
|
|
wxImage i = mono.ConvertToImage();
|
|
i.SetMaskColour( 255,255,255 );
|
|
i.Replace( 0,0,0,
|
|
wxRED_PEN->GetColour().Red(),
|
|
wxRED_PEN->GetColour().Green(),
|
|
wxRED_PEN->GetColour().Blue() );
|
|
dc.DrawBitmap( wxBitmap(i), x + 120, y + 30, true );
|
|
dc.SetTextForeground( *wxBLACK );
|
|
}
|
|
|
|
// For testing transparency
|
|
dc.SetBrush( *wxRED_BRUSH );
|
|
dc.DrawRectangle( 20, 2220, 560, 68 );
|
|
|
|
dc.DrawText(wxT("XPM bitmap"), 30, 2230 );
|
|
if ( m_bmpSmileXpm.IsOk() )
|
|
dc.DrawBitmap(m_bmpSmileXpm, 30, 2250, true);
|
|
|
|
dc.DrawText(wxT("XPM icon"), 110, 2230 );
|
|
if ( m_iconSmileXpm.IsOk() )
|
|
dc.DrawIcon(m_iconSmileXpm, 110, 2250);
|
|
|
|
// testing icon -> bitmap conversion
|
|
wxBitmap to_blit( m_iconSmileXpm );
|
|
if (to_blit.IsOk())
|
|
{
|
|
dc.DrawText( wxT("SubBitmap"), 170, 2230 );
|
|
wxBitmap sub = to_blit.GetSubBitmap( wxRect(0,0,15,15) );
|
|
if (sub.IsOk())
|
|
dc.DrawBitmap( sub, 170, 2250, true );
|
|
|
|
dc.DrawText( wxT("Enlarged"), 250, 2230 );
|
|
dc.SetUserScale( 1.5, 1.5 );
|
|
dc.DrawBitmap( to_blit, (int)(250/1.5), (int)(2250/1.5), true );
|
|
dc.SetUserScale( 2, 2 );
|
|
dc.DrawBitmap( to_blit, (int)(300/2), (int)(2250/2), true );
|
|
dc.SetUserScale( 1.0, 1.0 );
|
|
|
|
dc.DrawText( wxT("Blit"), 400, 2230);
|
|
wxMemoryDC blit_dc;
|
|
blit_dc.SelectObject( to_blit );
|
|
dc.Blit( 400, 2250, to_blit.GetWidth(), to_blit.GetHeight(), &blit_dc, 0, 0, wxCOPY, true );
|
|
dc.SetUserScale( 1.5, 1.5 );
|
|
dc.Blit( (int)(450/1.5), (int)(2250/1.5), to_blit.GetWidth(), to_blit.GetHeight(), &blit_dc, 0, 0, wxCOPY, true );
|
|
dc.SetUserScale( 2, 2 );
|
|
dc.Blit( (int)(500/2), (int)(2250/2), to_blit.GetWidth(), to_blit.GetHeight(), &blit_dc, 0, 0, wxCOPY, true );
|
|
dc.SetUserScale( 1.0, 1.0 );
|
|
}
|
|
|
|
dc.DrawText( wxT("ICO handler (1st image)"), 30, 2290 );
|
|
if (my_horse_ico32.IsOk())
|
|
dc.DrawBitmap( my_horse_ico32, 30, 2330, true );
|
|
|
|
dc.DrawText( wxT("ICO handler (2nd image)"), 230, 2290 );
|
|
if (my_horse_ico16.IsOk())
|
|
dc.DrawBitmap( my_horse_ico16, 230, 2330, true );
|
|
|
|
dc.DrawText( wxT("ICO handler (best image)"), 430, 2290 );
|
|
if (my_horse_ico.IsOk())
|
|
dc.DrawBitmap( my_horse_ico, 430, 2330, true );
|
|
|
|
dc.DrawText( wxT("CUR handler"), 30, 2390 );
|
|
if (my_horse_cur.IsOk())
|
|
{
|
|
dc.DrawBitmap( my_horse_cur, 30, 2420, true );
|
|
dc.SetPen (*wxRED_PEN);
|
|
dc.DrawLine (xH-10,yH,xH+10,yH);
|
|
dc.DrawLine (xH,yH-10,xH,yH+10);
|
|
}
|
|
|
|
dc.DrawText( wxT("ANI handler"), 230, 2390 );
|
|
for ( int i=0; i < m_ani_images; i++ )
|
|
{
|
|
if (my_horse_ani[i].IsOk())
|
|
{
|
|
dc.DrawBitmap( my_horse_ani[i], 230 + i * 2 * my_horse_ani[i].GetWidth() , 2420, true );
|
|
}
|
|
}
|
|
|
|
dc.DrawText("PNG from resources", 30, 2460);
|
|
if ( my_png_from_res.IsOk() )
|
|
dc.DrawBitmap(my_png_from_res, 30, 2480, true);
|
|
dc.DrawText("PNG from memory", 230, 2460);
|
|
if ( my_png_from_mem.IsOk() )
|
|
dc.DrawBitmap(my_png_from_mem, 230, 2480, true);
|
|
}
|
|
|
|
void MyCanvas::CreateAntiAliasedBitmap()
|
|
{
|
|
wxBitmap bitmap( 300, 300 );
|
|
|
|
{
|
|
wxMemoryDC dc(bitmap);
|
|
|
|
dc.Clear();
|
|
|
|
dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) );
|
|
dc.SetTextForeground( wxT("RED") );
|
|
dc.DrawText( wxT("This is anti-aliased Text."), 20, 5 );
|
|
dc.DrawText( wxT("And a Rectangle."), 20, 45 );
|
|
|
|
dc.SetBrush( *wxRED_BRUSH );
|
|
dc.SetPen( *wxTRANSPARENT_PEN );
|
|
dc.DrawRoundedRectangle( 20, 85, 200, 180, 20 );
|
|
}
|
|
|
|
wxImage original = bitmap.ConvertToImage();
|
|
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, (unsigned char)red, (unsigned char)green, (unsigned char)blue );
|
|
}
|
|
|
|
my_anti = wxBitmap(anti);
|
|
}
|