/////////////////////////////////////////////////////////////////////////////// // Name: samples/image/canvas.cpp // Purpose: sample showing operations with wxImage // Author: Robert Roebling // Modified by: Francesco Montorsi // Created: 1998 // RCS-ID: $Id$ // Copyright: (c) 1998-2005 Robert Roebling // Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// // 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/filename.h" #include "wx/mstream.h" #include "wx/wfstream.h" #include "wx/quantize.h" #include "wx/stopwatch.h" #if wxUSE_CLIPBOARD #include "wx/dataobj.h" #include "wx/clipbrd.h" #endif // wxUSE_CLIPBOARD #include "smile.xbm" #include "smile.xpm" #include "canvas.h" //----------------------------------------------------------------------------- // MyCanvas //----------------------------------------------------------------------------- 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 ) , m_bmpSmileXpm(smile_xpm) , m_iconSmileXpm(smile_xpm) { my_horse_ani = NULL; m_ani_images = 0 ; SetBackgroundColour(* wxWHITE); wxBitmap bitmap( 100, 100 ); wxMemoryDC dc; dc.SelectObject( bitmap ); dc.SetBrush( wxBrush( wxT("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 = wxT("./"); else if ( wxFile::Exists(wxT("../horse.png")) ) dir = wxT("../"); else wxLogWarning(wxT("Can't find image files in either '.' or '..'!")); wxImage image = bitmap.ConvertToImage(); #if wxUSE_LIBPNG if ( !image.SaveFile( dir + wxT("test.png"), wxBITMAP_TYPE_PNG )) { wxLogError(wxT("Can't save file")); } image.Destroy(); if ( image.LoadFile( dir + wxT("test.png") ) ) my_square = wxBitmap( image ); image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.png")) ) { wxLogError(wxT("Can't load PNG image")); } else { my_horse_png = wxBitmap( image ); } if ( !image.LoadFile( dir + wxT("toucan.png")) ) { wxLogError(wxT("Can't load PNG image")); } else { my_toucan = wxBitmap(image); } my_toucan_flipped_horiz = wxBitmap(image.Mirror(true)); my_toucan_flipped_vert = wxBitmap(image.Mirror(false)); my_toucan_flipped_both = wxBitmap(image.Mirror(true).Mirror(false)); my_toucan_grey = wxBitmap(image.ConvertToGreyscale()); my_toucan_head = wxBitmap(image.GetSubImage(wxRect(40, 7, 80, 60))); my_toucan_scaled_normal = wxBitmap(image.Scale(110,90,wxIMAGE_QUALITY_NORMAL)); my_toucan_scaled_high = wxBitmap(image.Scale(110,90,wxIMAGE_QUALITY_HIGH)); my_toucan_blur = wxBitmap(image.Blur(10)); #endif // wxUSE_LIBPNG #if wxUSE_LIBJPEG image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.jpg")) ) { wxLogError(wxT("Can't load JPG image")); } else { my_horse_jpeg = wxBitmap( image ); // Colorize by rotating green hue to red wxImage::HSVValue greenHSV = wxImage::RGBtoHSV(wxImage::RGBValue(0, 255, 0)); wxImage::HSVValue redHSV = wxImage::RGBtoHSV(wxImage::RGBValue(255, 0, 0)); image.RotateHue(redHSV.hue - greenHSV.hue); colorized_horse_jpeg = wxBitmap( image ); } if ( !image.LoadFile( dir + wxT("cmyk.jpg")) ) { wxLogError(wxT("Can't load CMYK JPG image")); } else { my_cmyk_jpeg = wxBitmap(image); } #endif // wxUSE_LIBJPEG #if wxUSE_GIF image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.gif" )) ) { wxLogError(wxT("Can't load GIF image")); } else { my_horse_gif = wxBitmap( image ); } #endif #if wxUSE_PCX image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.pcx"), wxBITMAP_TYPE_PCX ) ) { wxLogError(wxT("Can't load PCX image")); } else { my_horse_pcx = wxBitmap( image ); } #endif image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.bmp"), wxBITMAP_TYPE_BMP ) ) { wxLogError(wxT("Can't load BMP image")); } else { my_horse_bmp = wxBitmap( image ); } #if wxUSE_XPM image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.xpm"), wxBITMAP_TYPE_XPM ) ) { wxLogError(wxT("Can't load XPM image")); } else { my_horse_xpm = wxBitmap( image ); } if ( !image.SaveFile( dir + wxT("test.xpm"), wxBITMAP_TYPE_XPM )) { wxLogError(wxT("Can't save file")); } #endif #if wxUSE_PNM image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.pnm"), wxBITMAP_TYPE_PNM ) ) { wxLogError(wxT("Can't load PNM image")); } else { my_horse_pnm = wxBitmap( image ); } image.Destroy(); if ( !image.LoadFile( dir + wxT("horse_ag.pnm"), wxBITMAP_TYPE_PNM ) ) { wxLogError(wxT("Can't load PNM image")); } else { my_horse_asciigrey_pnm = wxBitmap( image ); } image.Destroy(); if ( !image.LoadFile( dir + wxT("horse_rg.pnm"), wxBITMAP_TYPE_PNM ) ) { wxLogError(wxT("Can't load PNM image")); } else { my_horse_rawgrey_pnm = wxBitmap( image ); } #endif #if wxUSE_LIBTIFF image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.tif"), wxBITMAP_TYPE_TIF ) ) { wxLogError(wxT("Can't load TIFF image")); } else { my_horse_tiff = wxBitmap( image ); } #endif #if wxUSE_LIBTIFF image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.tga"), wxBITMAP_TYPE_TGA ) ) { wxLogError(wxT("Can't load TGA image")); } else { my_horse_tga = wxBitmap( image ); } #endif CreateAntiAliasedBitmap(); my_smile_xbm = wxBitmap( (const char*)smile_bits, smile_width, smile_height, 1 ); // demonstrates XPM automatically using the mask when saving if ( m_bmpSmileXpm.Ok() ) m_bmpSmileXpm.SaveFile(wxT("saved.xpm"), wxBITMAP_TYPE_XPM); #if wxUSE_ICO_CUR image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.ico"), wxBITMAP_TYPE_ICO, 0 ) ) { wxLogError(wxT("Can't load first ICO image")); } else { my_horse_ico32 = wxBitmap( image ); } image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.ico"), wxBITMAP_TYPE_ICO, 1 ) ) { wxLogError(wxT("Can't load second ICO image")); } else { my_horse_ico16 = wxBitmap( image ); } image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.ico") ) ) { wxLogError(wxT("Can't load best ICO image")); } else { my_horse_ico = wxBitmap( image ); } image.Destroy(); if ( !image.LoadFile( dir + wxT("horse.cur"), wxBITMAP_TYPE_CUR ) ) { wxLogError(wxT("Can't load best ICO image")); } else { my_horse_cur = wxBitmap( image ); xH = 30 + image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X) ; yH = 2420 + image.GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y) ; } m_ani_images = wxImage::GetImageCount ( dir + wxT("horse3.ani"), wxBITMAP_TYPE_ANI ); if (m_ani_images==0) { wxLogError(wxT("No ANI-format images found")); } else { my_horse_ani = new wxBitmap [m_ani_images]; } int i; for (i=0; i < m_ani_images; i++) { image.Destroy(); if (!image.LoadFile( dir + wxT("horse3.ani"), wxBITMAP_TYPE_ANI, i )) { wxString tmp = wxT("Can't load image number "); tmp << i ; wxLogError(tmp); } else my_horse_ani [i] = wxBitmap( image ); } #endif // wxUSE_ICO_CUR image.Destroy(); // test image loading from stream wxFile file(dir + wxT("horse.bmp")); if ( file.IsOpened() ) { wxFileOffset len = file.Length(); size_t dataSize = (size_t)len; void *data = malloc(dataSize); if ( file.Read(data, dataSize) != len ) { wxLogError(wxT("Reading bitmap file failed")); } else { wxMemoryInputStream mis(data, dataSize); if ( !image.LoadFile(mis) ) { wxLogError(wxT("Can't load BMP image from stream")); } else { my_horse_bmp2 = wxBitmap( image ); } } free(data); } } MyCanvas::~MyCanvas() { delete [] my_horse_ani; } void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) ) { wxPaintDC dc( this ); PrepareDC( dc ); dc.DrawText( wxT("Loaded image"), 30, 10 ); if (my_square.Ok()) dc.DrawBitmap( my_square, 30, 30 ); dc.DrawText( wxT("Drawn directly"), 150, 10 ); dc.SetBrush( wxBrush( wxT("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.Ok()) dc.DrawBitmap( my_anti, 280, 30 ); dc.DrawText( wxT("PNG handler"), 30, 135 ); if (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( wxT("GetSubBitmap()"), 280, 175 ); dc.DrawBitmap( sub, 280, 195 ); } dc.DrawText( wxT("JPEG handler"), 30, 365 ); if (my_horse_jpeg.Ok()) dc.DrawBitmap( my_horse_jpeg, 30, 380 ); dc.DrawText( wxT("Green rotated to red"), 280, 365 ); if (colorized_horse_jpeg.Ok()) dc.DrawBitmap( colorized_horse_jpeg, 280, 380 ); dc.DrawText( wxT("CMYK JPEG image"), 530, 365 ); if (my_cmyk_jpeg.Ok()) dc.DrawBitmap( my_cmyk_jpeg, 530, 380 ); dc.DrawText( wxT("GIF handler"), 30, 595 ); if (my_horse_gif.Ok()) dc.DrawBitmap( my_horse_gif, 30, 610 ); dc.DrawText( wxT("PCX handler"), 30, 825 ); if (my_horse_pcx.Ok()) dc.DrawBitmap( my_horse_pcx, 30, 840 ); dc.DrawText( wxT("BMP handler"), 30, 1055 ); if (my_horse_bmp.Ok()) dc.DrawBitmap( my_horse_bmp, 30, 1070 ); dc.DrawText( wxT("BMP read from memory"), 280, 1055 ); if (my_horse_bmp2.Ok()) dc.DrawBitmap( my_horse_bmp2, 280, 1070 ); dc.DrawText( wxT("PNM handler"), 30, 1285 ); if (my_horse_pnm.Ok()) dc.DrawBitmap( my_horse_pnm, 30, 1300 ); dc.DrawText( wxT("PNM handler (ascii grey)"), 280, 1285 ); if (my_horse_asciigrey_pnm.Ok()) dc.DrawBitmap( my_horse_asciigrey_pnm, 280, 1300 ); dc.DrawText( wxT("PNM handler (raw grey)"), 530, 1285 ); if (my_horse_rawgrey_pnm.Ok()) dc.DrawBitmap( my_horse_rawgrey_pnm, 530, 1300 ); dc.DrawText( wxT("TIFF handler"), 30, 1515 ); if (my_horse_tiff.Ok()) dc.DrawBitmap( my_horse_tiff, 30, 1530 ); dc.DrawText( wxT("TGA handler"), 30, 1745 ); if (my_horse_tga.Ok()) dc.DrawBitmap( my_horse_tga, 30, 1760 ); dc.DrawText( wxT("XPM handler"), 30, 1975 ); if (my_horse_xpm.Ok()) dc.DrawBitmap( my_horse_xpm, 30, 2000 ); // toucans { int x = 750, y = 10, yy = 170; dc.DrawText(wxT("Original toucan"), x+50, y); dc.DrawBitmap(my_toucan, x, y+15, true); y += yy; dc.DrawText(wxT("Flipped horizontally"), x+50, y); dc.DrawBitmap(my_toucan_flipped_horiz, x, y+15, true); y += yy; dc.DrawText(wxT("Flipped vertically"), x+50, y); dc.DrawBitmap(my_toucan_flipped_vert, x, y+15, true); y += yy; dc.DrawText(wxT("Flipped both h&v"), x+50, y); dc.DrawBitmap(my_toucan_flipped_both, x, y+15, true); y += yy; dc.DrawText(wxT("In greyscale"), x+50, y); dc.DrawBitmap(my_toucan_grey, x, y+15, true); y += yy; dc.DrawText(wxT("Toucan's head"), x+50, y); dc.DrawBitmap(my_toucan_head, x, y+15, true); y += yy; dc.DrawText(wxT("Scaled with normal quality"), x+50, y); dc.DrawBitmap(my_toucan_scaled_normal, x, y+15, true); y += yy; dc.DrawText(wxT("Scaled with high quality"), x+50, y); dc.DrawBitmap(my_toucan_scaled_high, x, y+15, true); y += yy; dc.DrawText(wxT("Blured"), x+50, y); dc.DrawBitmap(my_toucan_blur, x, y+15, true); } if (my_smile_xbm.Ok()) { 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.Ok()) { 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.Ok() ) dc.DrawBitmap(m_bmpSmileXpm, 30, 2250, true); dc.DrawText(wxT("XPM icon"), 110, 2230 ); if ( m_iconSmileXpm.Ok() ) dc.DrawIcon(m_iconSmileXpm, 110, 2250); // testing icon -> bitmap conversion wxBitmap to_blit( m_iconSmileXpm ); if (to_blit.Ok()) { dc.DrawText( wxT("SubBitmap"), 170, 2230 ); wxBitmap sub = to_blit.GetSubBitmap( wxRect(0,0,15,15) ); if (sub.Ok()) 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.Ok()) dc.DrawBitmap( my_horse_ico32, 30, 2330, true ); dc.DrawText( wxT("ICO handler (2nd image)"), 230, 2290 ); if (my_horse_ico16.Ok()) dc.DrawBitmap( my_horse_ico16, 230, 2330, true ); dc.DrawText( wxT("ICO handler (best image)"), 430, 2290 ); if (my_horse_ico.Ok()) dc.DrawBitmap( my_horse_ico, 430, 2330, true ); dc.DrawText( wxT("CUR handler"), 30, 2390 ); if (my_horse_cur.Ok()) { 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].Ok()) { dc.DrawBitmap( my_horse_ani[i], 230 + i * 2 * my_horse_ani[i].GetWidth() , 2420, true ); } } } void MyCanvas::CreateAntiAliasedBitmap() { wxBitmap bitmap( 300, 300 ); wxMemoryDC dc; dc.SelectObject( 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); }