/* * Program: image * * Author: Robert Roebling * * Copyright: (C) 1998, Robert Roebling * */ // For compilers that support precompilation, includes "wx/wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ #pragma hdrstop #endif #ifndef WX_PRECOMP #include "wx/wx.h" #endif #include "wx/image.h" #include "wx/file.h" #include "wx/mstream.h" #include "wx/wfstream.h" #include "wx/quantize.h" #include "smile.xbm" #include "smile.xpm" // derived classes class MyFrame; class MyApp; // MyCanvas class MyCanvas: public wxScrolledWindow { public: MyCanvas() {}; MyCanvas( wxWindow *parent, wxWindowID, const wxPoint &pos, const wxSize &size ); ~MyCanvas(); void OnPaint( wxPaintEvent &event ); void CreateAntiAliasedBitmap(); wxBitmap *my_horse_png; wxBitmap *my_horse_jpeg; wxBitmap *my_horse_gif; wxBitmap *my_horse_bmp; wxBitmap *my_horse_pcx; wxBitmap *my_horse_pnm; wxBitmap *my_horse_tiff; wxBitmap *my_horse_xpm; wxBitmap *my_smile_xbm; wxBitmap *my_square; wxBitmap *my_anti; protected: wxBitmap m_bmpSmileXpm; wxIcon m_iconSmileXpm; private: DECLARE_DYNAMIC_CLASS(MyCanvas) DECLARE_EVENT_TABLE() }; const int nChoices = 8 ; static const wxString bppchoices[nChoices] = { "1 bpp color", "1 bpp B&W", "4 bpp color", "8 bpp color", "8 bpp greyscale", "8 bpp red", "8 bpp own palette", "24 bpp" }; static const int bppvalues[nChoices] = { wxBMP_1BPP, wxBMP_1BPP_BW, wxBMP_4BPP, wxBMP_8BPP, wxBMP_8BPP_GREY, wxBMP_8BPP_RED, wxBMP_8BPP_PALETTE, wxBMP_24BPP }; // MyFrame class MyFrame: public wxFrame { public: MyFrame(); void OnAbout( wxCommandEvent &event ); void OnNewFrame( wxCommandEvent &event ); void OnQuit( wxCommandEvent &event ); MyCanvas *m_canvas; private: DECLARE_DYNAMIC_CLASS(MyFrame) DECLARE_EVENT_TABLE() }; class MyImageFrame : public wxFrame { public: MyImageFrame(wxFrame *parent, const wxBitmap& bitmap) : wxFrame(parent, -1, _T("Double click to save"), wxDefaultPosition, wxDefaultSize, wxCAPTION | wxSYSTEM_MENU), m_bitmap(bitmap) { SetClientSize(bitmap.GetWidth(), bitmap.GetHeight()); } void OnPaint(wxPaintEvent& WXUNUSED(event)) { wxPaintDC dc( this ); dc.DrawBitmap( m_bitmap, 0, 0 ); } void OnSave(wxCommandEvent& WXUNUSED(event)) { wxImage image(m_bitmap); int bppselection = wxGetSingleChoiceIndex("Set BMP BPP", "Set BMP BPP", nChoices, bppchoices, this); if ( bppselection == -1 ) { // cancelled return; } image.SetOption(wxBMP_FORMAT, bppvalues[bppselection]); wxString deffilename = bppchoices[bppselection]; deffilename.Replace(wxT(" "), wxT("_")); deffilename += wxT(".bmp"); wxString savefilename = wxFileSelector( wxT("Save Image"), wxT(""), deffilename, (const wxChar *)NULL, wxT("BMP files (*.bmp)|*.bmp|") wxT("PNG files (*.png)|*.png|") wxT("JPEG files (*.jpg)|*.jpg|") wxT("GIF files (*.gif)|*.gif|") wxT("TIFF files (*.tif)|*.tif|") wxT("PCX files (*.pcx)|*.pcx"), wxSAVE); if ( savefilename.empty() ) return; if ( image.GetOptionInt(wxBMP_FORMAT) == wxBMP_8BPP_PALETTE ) { unsigned char *cmap = new unsigned char [256]; for ( int i = 0; i < 256; i++ ) cmap[i] = i; image.SetPalette(wxPalette(256, cmap, cmap, cmap)); delete cmap; } bool saved = FALSE; wxString extension = savefilename.AfterLast('.').Lower(); if (extension == "bmp") saved=image.SaveFile(savefilename, wxBITMAP_TYPE_BMP); else if (extension == "png") saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PNG); else if (extension == "pcx") saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PCX); else if ((extension == "tif") || (extension == "tiff")) saved=image.SaveFile(savefilename, wxBITMAP_TYPE_TIF); else if (extension == "jpg") saved=image.SaveFile(savefilename, wxBITMAP_TYPE_JPEG); else if (extension == "pnm") saved=image.SaveFile(savefilename, wxBITMAP_TYPE_PNM); else wxMessageBox("Unknown file type, see options in file selector.", "Unknown file type", wxOK|wxCENTRE, this); } private: wxBitmap m_bitmap; DECLARE_EVENT_TABLE() }; // MyApp class MyApp: public wxApp { public: virtual bool OnInit(); }; // main program IMPLEMENT_APP(MyApp) // MyCanvas IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow) BEGIN_EVENT_TABLE(MyImageFrame, wxFrame) EVT_PAINT(MyImageFrame::OnPaint) EVT_LEFT_DCLICK(MyImageFrame::OnSave) END_EVENT_TABLE() BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow) EVT_PAINT(MyCanvas::OnPaint) END_EVENT_TABLE() MyCanvas::MyCanvas( wxWindow *parent, wxWindowID id, const wxPoint &pos, const wxSize &size ) : wxScrolledWindow( parent, id, pos, size, wxSUNKEN_BORDER ) #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW , m_bmpSmileXpm((const char **) smile_xpm) , m_iconSmileXpm((const char **) smile_xpm) #endif { my_horse_png = (wxBitmap*) NULL; my_horse_jpeg = (wxBitmap*) NULL; my_horse_gif = (wxBitmap*) NULL; my_horse_bmp = (wxBitmap*) NULL; my_horse_pcx = (wxBitmap*) NULL; my_horse_pnm = (wxBitmap*) NULL; my_horse_tiff = (wxBitmap*) NULL; my_horse_xpm = (wxBitmap*) NULL; my_smile_xbm = (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.SetPen( *wxBLACK_PEN ); dc.DrawRectangle( 0, 0, 100, 100 ); dc.SetBrush( *wxWHITE_BRUSH ); dc.DrawRectangle( 20, 20, 60, 60 ); dc.SelectObject( wxNullBitmap ); // try to find the directory with our images wxString dir; if ( wxFile::Exists(wxT("./horse.png")) ) dir = "./"; else if ( wxFile::Exists(wxT("../horse.png")) ) dir = "../"; else wxLogWarning(wxT("Can't find image files in either '.' or '..'!")); wxImage image = bitmap.ConvertToImage(); #if wxUSE_LIBPNG if ( !image.SaveFile( dir + wxString("test.png"), wxBITMAP_TYPE_PNG )) wxLogError(wxT("Can't save file")); image.Destroy(); image.LoadFile( dir + wxString("test.png") ); my_square = new wxBitmap( image ); image.Destroy(); if ( !image.LoadFile( dir + wxString("horse.png")) ) wxLogError(wxT("Can't load PNG image")); else my_horse_png = new wxBitmap( image ); #endif // wxUSE_LIBPNG #if wxUSE_LIBJPEG image.Destroy(); if ( !image.LoadFile( dir + wxString("horse.jpg")) ) wxLogError(wxT("Can't load JPG image")); else my_horse_jpeg = new wxBitmap( image ); #endif // wxUSE_LIBJPEG #if wxUSE_GIF image.Destroy(); if ( !image.LoadFile( dir + wxString("horse.gif")) ) wxLogError(wxT("Can't load GIF image")); else my_horse_gif = new wxBitmap( image ); #endif #if wxUSE_PCX image.Destroy(); if ( !image.LoadFile( dir + wxString("horse.pcx"), wxBITMAP_TYPE_PCX ) ) wxLogError(wxT("Can't load PCX image")); else my_horse_pcx = new wxBitmap( image ); #endif image.Destroy(); if ( !image.LoadFile( dir + wxString("horse.bmp"), wxBITMAP_TYPE_BMP ) ) wxLogError(wxT("Can't load BMP image")); else my_horse_bmp = new wxBitmap( image ); #if wxUSE_XPM image.Destroy(); if ( !image.LoadFile( dir + wxString("horse.xpm"), wxBITMAP_TYPE_XPM ) ) wxLogError(wxT("Can't load XPM image")); else my_horse_xpm = new wxBitmap( image ); if ( !image.SaveFile( dir + wxString("test.xpm"), wxBITMAP_TYPE_XPM )) wxLogError(wxT("Can't save file")); #endif #if wxUSE_PNM image.Destroy(); if ( !image.LoadFile( dir + wxString("horse.pnm"), wxBITMAP_TYPE_PNM ) ) wxLogError(wxT("Can't load PNM image")); else my_horse_pnm = new wxBitmap( image ); #endif #if wxUSE_LIBTIFF image.Destroy(); if ( !image.LoadFile( dir + wxString("horse.tif"), wxBITMAP_TYPE_TIF ) ) wxLogError(wxT("Can't load TIFF image")); else my_horse_tiff = new wxBitmap( image ); #endif CreateAntiAliasedBitmap(); my_smile_xbm = new wxBitmap( (const char*)smile_bits, smile_width, smile_height, 1 ); #if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW // demonstrates XPM automatically using the mask when saving if ( m_bmpSmileXpm.Ok() ) m_bmpSmileXpm.SaveFile("saved.xpm", wxBITMAP_TYPE_XPM); #endif } MyCanvas::~MyCanvas() { delete my_horse_pnm; delete my_horse_png; delete my_horse_jpeg; delete my_horse_gif; delete my_horse_bmp; delete my_horse_pcx; delete my_horse_tiff; delete my_horse_xpm; delete my_smile_xbm; delete my_square; delete my_anti; } void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) ) { wxPaintDC dc( this ); PrepareDC( dc ); 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( *wxBLACK_PEN ); dc.DrawRectangle( 150, 30, 100, 100 ); dc.SetBrush( *wxWHITE_BRUSH ); dc.DrawRectangle( 170, 50, 60, 60 ); if (my_anti && my_anti->Ok()) dc.DrawBitmap( *my_anti, 280, 30 ); dc.DrawText( "PNG handler", 30, 135 ); if (my_horse_png && my_horse_png->Ok()) { dc.DrawBitmap( *my_horse_png, 30, 150 ); wxRect rect(0,0,100,100); wxBitmap sub( my_horse_png->GetSubBitmap(rect) ); dc.DrawText( "GetSubBitmap()", 280, 190 ); dc.DrawBitmap( sub, 280, 210 ); } 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( "PCX handler", 30, 825 ); if (my_horse_pcx && my_horse_pcx->Ok()) dc.DrawBitmap( *my_horse_pcx, 30, 840 ); dc.DrawText( "BMP handler", 30, 1055 ); if (my_horse_bmp && my_horse_bmp->Ok()) dc.DrawBitmap( *my_horse_bmp, 30, 1070 ); dc.DrawText( "PNM handler", 30, 1285 ); if (my_horse_pnm && my_horse_pnm->Ok()) dc.DrawBitmap( *my_horse_pnm, 30, 1300 ); dc.DrawText( "TIFF handler", 30, 1515 ); if (my_horse_tiff && my_horse_tiff->Ok()) dc.DrawBitmap( *my_horse_tiff, 30, 1530 ); dc.DrawText( "XPM handler", 30, 1745 ); if (my_horse_xpm && my_horse_xpm->Ok()) dc.DrawBitmap( *my_horse_xpm, 30, 1760 ); if (my_smile_xbm && my_smile_xbm->Ok()) { dc.DrawText( "XBM bitmap", 30, 1975 ); dc.DrawText( "(green on red)", 30, 1990 ); dc.SetTextForeground( "GREEN" ); dc.SetTextBackground( "RED" ); dc.DrawBitmap( *my_smile_xbm, 30, 2010 ); dc.SetTextForeground( "BLACK" ); dc.DrawText( "After wxImage conversion", 150, 1975 ); dc.DrawText( "(red on white)", 150, 1990 ); dc.SetTextForeground( "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( i.ConvertToBitmap(), 150, 2010, TRUE ); dc.SetTextForeground( "BLACK" ); } 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 ); memdc.DrawText( "Hi!", 5, 5 ); 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.Ok()) { dc.DrawText( "Mono bitmap", 30, 2095 ); dc.DrawText( "(red on green)", 30, 2110 ); dc.SetTextForeground( "RED" ); dc.SetTextBackground( "GREEN" ); dc.DrawBitmap( mono, 30, 2130 ); dc.SetTextForeground( "BLACK" ); dc.DrawText( "After wxImage conversion", 150, 2095 ); dc.DrawText( "(red on white)", 150, 2110 ); dc.SetTextForeground( "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( i.ConvertToBitmap(), 150, 2130, TRUE ); dc.SetTextForeground( "BLACK" ); } dc.DrawText("XPM bitmap", 30, 2230); if ( m_bmpSmileXpm.Ok() ) { dc.DrawBitmap(m_bmpSmileXpm, 30, 2250, TRUE); } dc.DrawText("XPM icon", 150, 2230); if ( m_iconSmileXpm.Ok() ) { dc.DrawIcon(m_iconSmileXpm, 150, 2250); } } void MyCanvas::CreateAntiAliasedBitmap() { wxBitmap bitmap( 300, 300 ); wxMemoryDC dc; dc.SelectObject( bitmap ); dc.Clear(); dc.SetFont( wxFont( 24, wxDECORATIVE, wxNORMAL, wxNORMAL) ); 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.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, red, green, blue ); } my_anti = new wxBitmap( anti.ConvertToBitmap() ); } // MyFrame const int ID_QUIT = 108; const int ID_ABOUT = 109; const int ID_NEW = 110; IMPLEMENT_DYNAMIC_CLASS( MyFrame, wxFrame ) BEGIN_EVENT_TABLE(MyFrame,wxFrame) EVT_MENU (ID_ABOUT, MyFrame::OnAbout) EVT_MENU (ID_QUIT, MyFrame::OnQuit) EVT_MENU (ID_NEW, MyFrame::OnNewFrame) END_EVENT_TABLE() MyFrame::MyFrame() : wxFrame( (wxFrame *)NULL, -1, "wxImage sample", wxPoint(20,20), wxSize(470,360) ) { wxMenu *file_menu = new wxMenu(); file_menu->Append( ID_NEW, "&Show image..."); file_menu->AppendSeparator(); file_menu->Append( ID_ABOUT, "&About..."); file_menu->AppendSeparator(); file_menu->Append( ID_QUIT, "E&xit"); wxMenuBar *menu_bar = new wxMenuBar(); 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) ); // 500 width * 2100 height m_canvas->SetScrollbars( 10, 10, 50, 220 ); } void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) ) { Close( TRUE ); } void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) ) { (void)wxMessageBox( "wxImage demo\n" "Robert Roebling (c) 1998,2000", "About wxImage Demo", wxICON_INFORMATION | wxOK ); } void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) ) { wxString filename = wxFileSelector(_T("Select image file")); if ( !filename ) return; wxImage image; if ( !image.LoadFile(filename) ) { wxLogError(_T("Couldn't load image from '%s'."), filename.c_str()); return; } (new MyImageFrame(this, image.ConvertToBitmap()))->Show(); } //----------------------------------------------------------------------------- // MyApp //----------------------------------------------------------------------------- bool MyApp::OnInit() { #if wxUSE_LIBPNG wxImage::AddHandler( new wxPNGHandler ); #endif #if wxUSE_LIBJPEG wxImage::AddHandler( new wxJPEGHandler ); #endif #if wxUSE_LIBTIFF wxImage::AddHandler( new wxTIFFHandler ); #endif #if wxUSE_GIF wxImage::AddHandler( new wxGIFHandler ); #endif #if wxUSE_PCX wxImage::AddHandler( new wxPCXHandler ); #endif #if wxUSE_PNM wxImage::AddHandler( new wxPNMHandler ); #endif #if wxUSE_XPM wxImage::AddHandler( new wxXPMHandler ); #endif wxFrame *frame = new MyFrame(); frame->Show( TRUE ); return TRUE; }