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wxWidgets/samples/image/image.cpp
Mattia Barbon 4693b20c75 Unicode compilation fixes. 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11661 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2001-09-21 20:21:44 +00:00

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/*
* 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()
};
// 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);
static const wxString bppchoices[8] =
{
"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[WXSIZEOF(bppchoices)] =
{
wxBMP_1BPP,
wxBMP_1BPP_BW,
wxBMP_4BPP,
wxBMP_8BPP,
wxBMP_8BPP_GREY,
wxBMP_8BPP_RED,
wxBMP_8BPP_PALETTE,
wxBMP_24BPP
};
int bppselection = wxGetSingleChoiceIndex("Set BMP BPP",
"Set BMP BPP",
WXSIZEOF(bppchoices),
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;
}
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