/////////////////////////////////////////////////////////////////////////////// // Name: samples/image/canvas.cpp // Purpose: sample showing operations with wxImage // Author: Robert Roebling // Modified by: Francesco Montorsi // Created: 1998 // Copyright: (c) 1998-2005 Robert Roebling // Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// // For compilers that support precompilation, includes "wx/wx.h". #include "wx/wxprec.h" #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 "cursor_png.c" #include "canvas.h" //----------------------------------------------------------------------------- // MyCanvas //----------------------------------------------------------------------------- wxBEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow) EVT_PAINT(MyCanvas::OnPaint) wxEND_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( "orange" ) ); 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("./horse.png") ) dir = "./"; else if ( wxFile::Exists("../horse.png") ) dir = "../"; else wxLogWarning("Can't find image files in either '.' or '..'!"); wxImage image = bitmap.ConvertToImage(); #if wxUSE_LIBPNG if ( !image.SaveFile( dir + "test.png", wxBITMAP_TYPE_PNG )) { wxLogError("Can't save file"); } image.Destroy(); if ( image.LoadFile( dir + "test.png" ) ) my_square = wxBitmap( image ); image.Destroy(); if ( !image.LoadFile( dir + "horse.png") ) { wxLogError("Can't load PNG image"); } else { my_horse_png = wxBitmap( image ); } if ( !image.LoadFile( dir + "toucan.png") ) { wxLogError("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 + "horse.jpg") ) { wxLogError("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 + "cmyk.jpg") ) { wxLogError("Can't load CMYK JPG image"); } else { my_cmyk_jpeg = wxBitmap(image); } #endif // wxUSE_LIBJPEG #if wxUSE_GIF image.Destroy(); if ( !image.LoadFile( dir + "horse.gif" ) ) { wxLogError("Can't load GIF image"); } else { my_horse_gif = wxBitmap( image ); } #endif #if wxUSE_PCX image.Destroy(); if ( !image.LoadFile( dir + "horse.pcx", wxBITMAP_TYPE_PCX ) ) { wxLogError("Can't load PCX image"); } else { my_horse_pcx = wxBitmap( image ); } #endif image.Destroy(); if ( !image.LoadFile( dir + "horse.bmp", wxBITMAP_TYPE_BMP ) ) { wxLogError("Can't load BMP image"); } else { my_horse_bmp = wxBitmap( image ); } #if wxUSE_XPM image.Destroy(); if ( !image.LoadFile( dir + "horse.xpm", wxBITMAP_TYPE_XPM ) ) { wxLogError("Can't load XPM image"); } else { my_horse_xpm = wxBitmap( image ); } if ( !image.SaveFile( dir + "test.xpm", wxBITMAP_TYPE_XPM )) { wxLogError("Can't save file"); } #endif #if wxUSE_PNM image.Destroy(); if ( !image.LoadFile( dir + "horse.pnm", wxBITMAP_TYPE_PNM ) ) { wxLogError("Can't load PNM image"); } else { my_horse_pnm = wxBitmap( image ); } image.Destroy(); if ( !image.LoadFile( dir + "horse_ag.pnm", wxBITMAP_TYPE_PNM ) ) { wxLogError("Can't load PNM image"); } else { my_horse_asciigrey_pnm = wxBitmap( image ); } image.Destroy(); if ( !image.LoadFile( dir + "horse_rg.pnm", wxBITMAP_TYPE_PNM ) ) { wxLogError("Can't load PNM image"); } else { my_horse_rawgrey_pnm = wxBitmap( image ); } #endif #if wxUSE_LIBTIFF image.Destroy(); if ( !image.LoadFile( dir + "horse.tif", wxBITMAP_TYPE_TIFF ) ) { wxLogError("Can't load TIFF image"); } else { my_horse_tiff = wxBitmap( image ); } #endif #if wxUSE_TGA image.Destroy(); if ( !image.LoadFile( dir + "horse.tga", wxBITMAP_TYPE_TGA ) ) { wxLogError("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.IsOk() ) m_bmpSmileXpm.SaveFile("saved.xpm", wxBITMAP_TYPE_XPM); #if wxUSE_ICO_CUR image.Destroy(); if ( !image.LoadFile( dir + "horse.ico", wxBITMAP_TYPE_ICO, 0 ) ) { wxLogError("Can't load first ICO image"); } else { my_horse_ico32 = wxBitmap( image ); } image.Destroy(); if ( !image.LoadFile( dir + "horse.ico", wxBITMAP_TYPE_ICO, 1 ) ) { wxLogError("Can't load second ICO image"); } else { my_horse_ico16 = wxBitmap( image ); } image.Destroy(); if ( !image.LoadFile( dir + "horse.ico" ) ) { wxLogError("Can't load best ICO image"); } else { my_horse_ico = wxBitmap( image ); } image.Destroy(); if ( !image.LoadFile( dir + "horse.cur", wxBITMAP_TYPE_CUR ) ) { wxLogError("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 + "horse3.ani", wxBITMAP_TYPE_ANI ); if (m_ani_images==0) { wxLogError("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 + "horse3.ani", wxBITMAP_TYPE_ANI, i )) { wxString tmp = "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 + "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("Reading bitmap file failed"); } else { wxMemoryInputStream mis(data, dataSize); if ( !image.LoadFile(mis) ) { wxLogError("Can't load BMP image from stream"); } else { my_horse_bmp2 = wxBitmap( image ); } } free(data); } // This macro loads PNG from either resources on the platforms that support // this (Windows and OS X) or from in-memory data (coming from cursor_png.c // included above in our case). my_png_from_res = wxBITMAP_PNG(cursor); // This one always loads PNG from memory but exists for consistency with // the above one and also because it frees you from the need to specify the // length explicitly, without it you'd have to do it and also spell the // array name in full, like this: // // my_png_from_mem = wxBitmap::NewFromPNGData(cursor_png, WXSIZEOF(cursor_png)); my_png_from_mem = wxBITMAP_PNG_FROM_DATA(cursor); } MyCanvas::~MyCanvas() { delete [] my_horse_ani; } void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) ) { wxPaintDC dc( this ); PrepareDC( dc ); dc.DrawText( "Loaded image", 30, 10 ); if (my_square.IsOk()) dc.DrawBitmap( my_square, 30, 30 ); dc.DrawText( "Drawn directly", 150, 10 ); dc.SetBrush( wxBrush( "orange" ) ); dc.SetPen( *wxBLACK_PEN ); dc.DrawRectangle( 150, 30, 100, 100 ); dc.SetBrush( *wxWHITE_BRUSH ); dc.DrawRectangle( 170, 50, 60, 60 ); if (my_anti.IsOk()) dc.DrawBitmap( my_anti, 280, 30 ); dc.DrawText( "PNG handler", 30, 135 ); if (my_horse_png.IsOk()) { dc.DrawBitmap( my_horse_png, 30, 150 ); wxRect rect(0,0,100,100); wxBitmap sub( my_horse_png.GetSubBitmap(rect) ); dc.DrawText( "GetSubBitmap()", 280, 175 ); dc.DrawBitmap( sub, 280, 195 ); } dc.DrawText( "JPEG handler", 30, 365 ); if (my_horse_jpeg.IsOk()) dc.DrawBitmap( my_horse_jpeg, 30, 380 ); dc.DrawText( "Green rotated to red", 280, 365 ); if (colorized_horse_jpeg.IsOk()) dc.DrawBitmap( colorized_horse_jpeg, 280, 380 ); dc.DrawText( "CMYK JPEG image", 530, 365 ); if (my_cmyk_jpeg.IsOk()) dc.DrawBitmap( my_cmyk_jpeg, 530, 380 ); dc.DrawText( "GIF handler", 30, 595 ); if (my_horse_gif.IsOk()) dc.DrawBitmap( my_horse_gif, 30, 610 ); dc.DrawText( "PCX handler", 30, 825 ); if (my_horse_pcx.IsOk()) dc.DrawBitmap( my_horse_pcx, 30, 840 ); dc.DrawText( "BMP handler", 30, 1055 ); if (my_horse_bmp.IsOk()) dc.DrawBitmap( my_horse_bmp, 30, 1070 ); dc.DrawText( "BMP read from memory", 280, 1055 ); if (my_horse_bmp2.IsOk()) dc.DrawBitmap( my_horse_bmp2, 280, 1070 ); dc.DrawText( "PNM handler", 30, 1285 ); if (my_horse_pnm.IsOk()) dc.DrawBitmap( my_horse_pnm, 30, 1300 ); dc.DrawText( "PNM handler (ascii grey)", 280, 1285 ); if (my_horse_asciigrey_pnm.IsOk()) dc.DrawBitmap( my_horse_asciigrey_pnm, 280, 1300 ); dc.DrawText( "PNM handler (raw grey)", 530, 1285 ); if (my_horse_rawgrey_pnm.IsOk()) dc.DrawBitmap( my_horse_rawgrey_pnm, 530, 1300 ); dc.DrawText( "TIFF handler", 30, 1515 ); if (my_horse_tiff.IsOk()) dc.DrawBitmap( my_horse_tiff, 30, 1530 ); dc.DrawText( "TGA handler", 30, 1745 ); if (my_horse_tga.IsOk()) dc.DrawBitmap( my_horse_tga, 30, 1760 ); dc.DrawText( "XPM handler", 30, 1975 ); if (my_horse_xpm.IsOk()) dc.DrawBitmap( my_horse_xpm, 30, 2000 ); // toucans { int x = 750, y = 10, yy = 170; dc.DrawText("Original toucan", x+50, y); dc.DrawBitmap(my_toucan, x, y+15, true); y += yy; dc.DrawText("Flipped horizontally", x+50, y); dc.DrawBitmap(my_toucan_flipped_horiz, x, y+15, true); y += yy; dc.DrawText("Flipped vertically", x+50, y); dc.DrawBitmap(my_toucan_flipped_vert, x, y+15, true); y += yy; dc.DrawText("Flipped both h&v", x+50, y); dc.DrawBitmap(my_toucan_flipped_both, x, y+15, true); y += yy; dc.DrawText("In greyscale", x+50, y); dc.DrawBitmap(my_toucan_grey, x, y+15, true); y += yy; dc.DrawText("Toucan's head", x+50, y); dc.DrawBitmap(my_toucan_head, x, y+15, true); y += yy; dc.DrawText("Scaled with normal quality", x+50, y); dc.DrawBitmap(my_toucan_scaled_normal, x, y+15, true); y += yy; dc.DrawText("Scaled with high quality", x+50, y); dc.DrawBitmap(my_toucan_scaled_high, x, y+15, true); y += yy; dc.DrawText("Blured", x+50, y); dc.DrawBitmap(my_toucan_blur, x, y+15, true); } if (my_smile_xbm.IsOk()) { int x = 300, y = 1800; dc.DrawText( "XBM bitmap", x, y ); dc.DrawText( "(green on red)", x, y + 15 ); dc.SetTextForeground( "GREEN" ); dc.SetTextBackground( "RED" ); dc.DrawBitmap( my_smile_xbm, x, y + 30 ); dc.SetTextForeground( *wxBLACK ); dc.DrawText( "After wxImage conversion", x + 120, y ); dc.DrawText( "(red on white)", x + 120, y + 15 ); 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( 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( "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( "Mono bitmap", x, y ); dc.DrawText( "(red on green)", x, y + 15 ); dc.SetTextForeground( "RED" ); dc.SetTextBackground( "GREEN" ); dc.DrawBitmap( mono, x, y + 30 ); dc.SetTextForeground( *wxBLACK ); dc.DrawText( "After wxImage conversion", x + 120, y ); dc.DrawText( "(red on white)", x + 120, y + 15 ); 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( 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("XPM bitmap", 30, 2230 ); if ( m_bmpSmileXpm.IsOk() ) dc.DrawBitmap(m_bmpSmileXpm, 30, 2250, true); dc.DrawText("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( "SubBitmap", 170, 2230 ); wxBitmap sub = to_blit.GetSubBitmap( wxRect(0,0,15,15) ); if (sub.IsOk()) dc.DrawBitmap( sub, 170, 2250, true ); dc.DrawText( "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( "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( "ICO handler (1st image)", 30, 2290 ); if (my_horse_ico32.IsOk()) dc.DrawBitmap( my_horse_ico32, 30, 2330, true ); dc.DrawText( "ICO handler (2nd image)", 230, 2290 ); if (my_horse_ico16.IsOk()) dc.DrawBitmap( my_horse_ico16, 230, 2330, true ); dc.DrawText( "ICO handler (best image)", 430, 2290 ); if (my_horse_ico.IsOk()) dc.DrawBitmap( my_horse_ico, 430, 2330, true ); dc.DrawText( "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( "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( wxFontInfo(24).Family(wxFONTFAMILY_DECORATIVE) ); dc.SetTextForeground( "RED" ); dc.DrawText( "This is anti-aliased Text.", 20, 5 ); dc.DrawText( "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); }