fix vertical mouse wheel event rotation value, sign was reversed in r74805

[wxWidgets.git] / samples / image / image.cpp

diff --git a/samples/image/image.cpp b/samples/image/image.cpp
index 7d6f8acd753a1cadf87a773884add33c6426a36d..3c614c322930476fc0d86852b3f1a715dbdbdbf8 100644 (file)
--- a/samples/image/image.cpp
+++ b/samples/image/image.cpp
@@ -1,11 +1,13 @@
-/*
- * Program: image
- *
- * Author: Robert Roebling
- *
- * Copyright: (C) 1998, Robert Roebling
- *
- */
+///////////////////////////////////////////////////////////////////////////////
+// Name:        samples/image/image.cpp
+// Purpose:     sample showing operations with wxImage
+// Author:      Robert Roebling
+// Modified by: Francesco Montorsi
+// Created:     1998
+// Copyright:   (c) 1998-2005 Robert Roebling
+//              (c) 2005-2009 Vadim Zeitlin
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////

 
 // For compilers that support precompilation, includes "wx/wx.h".
 #include "wx/wxprec.h"
 
 // For compilers that support precompilation, includes "wx/wx.h".
 #include "wx/wxprec.h"


@@ -15,107 +17,59 @@
 #endif
 
 #ifndef WX_PRECOMP
 #endif
 
 #ifndef WX_PRECOMP

-#include "wx/wx.h"
+    #include "wx/wx.h"

 #endif
 
 #include "wx/image.h"
 #include "wx/file.h"
 #endif
 
 #include "wx/image.h"
 #include "wx/file.h"

+#include "wx/filename.h"
+#include "wx/graphics.h"

 #include "wx/mstream.h"
 #include "wx/wfstream.h"
 #include "wx/quantize.h"
 #include "wx/mstream.h"
 #include "wx/wfstream.h"
 #include "wx/quantize.h"

+#include "wx/scopedptr.h"
+#include "wx/stopwatch.h"
+#include "wx/versioninfo.h"

 
 #if wxUSE_CLIPBOARD
     #include "wx/dataobj.h"
     #include "wx/clipbrd.h"
 #endif // wxUSE_CLIPBOARD
 
 
 #if wxUSE_CLIPBOARD
     #include "wx/dataobj.h"
     #include "wx/clipbrd.h"
 #endif // wxUSE_CLIPBOARD
 

-#include "smile.xbm"
-
-#if !defined(__WINDOWS__) || wxUSE_XPM_IN_MSW
-    #include "smile.xpm"
-#endif
-
-#if defined(__WXMSW__) || defined(__WXMAC__)
+#if defined(__WXMSW__)

     #ifdef wxHAVE_RAW_BITMAP
     #include "wx/rawbmp.h"
     #endif
 #endif
 
     #ifdef wxHAVE_RAW_BITMAP
     #include "wx/rawbmp.h"
     #endif
 #endif
 

-// derived classes
-
-class MyFrame;
-class MyApp;
-
-// MyCanvas
+#if defined(__WXMAC__) || defined(__WXGTK__)
+    #define wxHAVE_RAW_BITMAP
+    #include "wx/rawbmp.h"
+#endif

 
 

-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_bmp2;
-    wxBitmap  *my_horse_pcx;
-    wxBitmap  *my_horse_pnm;
-    wxBitmap  *my_horse_tiff;
-    wxBitmap  *my_horse_xpm;
-    wxBitmap  *my_horse_ico32;
-    wxBitmap  *my_horse_ico16;
-    wxBitmap  *my_horse_ico;
-    wxBitmap  *my_horse_cur;
-    wxBitmap  *my_horse_ani;
-
-    wxBitmap  *my_smile_xbm;
-    wxBitmap  *my_square;
-    wxBitmap  *my_anti;
-
-    int xH, yH ;
-    int m_ani_images ;
-
-protected:
-    wxBitmap m_bmpSmileXpm;
-    wxIcon   m_iconSmileXpm;
+#include "canvas.h"

 
 

-private:
-    DECLARE_DYNAMIC_CLASS(MyCanvas)
-    DECLARE_EVENT_TABLE()
-};
+#ifndef wxHAS_IMAGES_IN_RESOURCES
+    #include "../sample.xpm"
+#endif

 
 

+// ============================================================================
+// declarations
+// ============================================================================

 
 

-const int nChoices = 8 ;
-static const wxString bppchoices[nChoices] =
-{
-    _T("1 bpp color"),
-    _T("1 bpp B&W"),
-    _T("4 bpp color"),
-    _T("8 bpp color"),
-    _T("8 bpp greyscale"),
-    _T("8 bpp red"),
-    _T("8 bpp own palette"),
-    _T("24 bpp")
-};
+//-----------------------------------------------------------------------------
+// MyApp
+//-----------------------------------------------------------------------------

 
 

-static const int bppvalues[nChoices] =
+class MyApp: public wxApp

 {
 {

-    wxBMP_1BPP,
-    wxBMP_1BPP_BW,
-    wxBMP_4BPP,
-    wxBMP_8BPP,
-    wxBMP_8BPP_GREY,
-    wxBMP_8BPP_RED,
-    wxBMP_8BPP_PALETTE,
-    wxBMP_24BPP
+public:
+    virtual bool OnInit();

 };
 
 };
 

+// ----------------------------------------------------------------------------

 // MyFrame
 // MyFrame

-
+// ----------------------------------------------------------------------------

 
 class MyFrame: public wxFrame
 {
 
 class MyFrame: public wxFrame
 {


@@ -124,9 +78,15 @@ public:
 
     void OnAbout( wxCommandEvent &event );
     void OnNewFrame( wxCommandEvent &event );
 
     void OnAbout( wxCommandEvent &event );
     void OnNewFrame( wxCommandEvent &event );

+    void OnImageInfo( wxCommandEvent &event );
+    void OnThumbnail( wxCommandEvent &event );
+

 #ifdef wxHAVE_RAW_BITMAP
     void OnTestRawBitmap( wxCommandEvent &event );
 #endif // wxHAVE_RAW_BITMAP
 #ifdef wxHAVE_RAW_BITMAP
     void OnTestRawBitmap( wxCommandEvent &event );
 #endif // wxHAVE_RAW_BITMAP

+#if wxUSE_GRAPHICS_CONTEXT
+    void OnTestGraphics(wxCommandEvent& event);
+#endif // wxUSE_GRAPHICS_CONTEXT

     void OnQuit( wxCommandEvent &event );
 
 #if wxUSE_CLIPBOARD
     void OnQuit( wxCommandEvent &event );
 
 #if wxUSE_CLIPBOARD


@@ -137,20 +97,88 @@ public:
     MyCanvas         *m_canvas;
 
 private:
     MyCanvas         *m_canvas;
 
 private:

+    // ask user for the file name and try to load an image from it
+    //
+    // return the file path on success, empty string if we failed to load the
+    // image or were cancelled by user
+    static wxString LoadUserImage(wxImage& image);
+
+

     DECLARE_DYNAMIC_CLASS(MyFrame)
     DECLARE_EVENT_TABLE()
 };
 
     DECLARE_DYNAMIC_CLASS(MyFrame)
     DECLARE_EVENT_TABLE()
 };
 

+// ----------------------------------------------------------------------------
+// Frame used for showing a standalone image
+// ----------------------------------------------------------------------------
+
+enum
+{
+    ID_ROTATE_LEFT = wxID_HIGHEST+1,
+    ID_ROTATE_RIGHT,
+    ID_RESIZE,
+    ID_PAINT_BG
+};
+

 class MyImageFrame : public wxFrame
 {
 public:
 class MyImageFrame : public wxFrame
 {
 public:

-    MyImageFrame(wxFrame *parent, const wxBitmap& bitmap)
-        : wxFrame(parent, -1, _T("Double click to save"),
-                  wxDefaultPosition, wxDefaultSize,
-                  wxCAPTION | wxSYSTEM_MENU | wxCLOSE_BOX),
-                  m_bitmap(bitmap)
+    MyImageFrame(wxFrame *parent, const wxString& desc, const wxImage& image)
+    {
+        Create(parent, desc, wxBitmap(image), image.GetImageCount(desc));
+    }
+
+    MyImageFrame(wxFrame *parent, const wxString& desc, const wxBitmap& bitmap)

     {
     {

+        Create(parent, desc, bitmap);
+    }
+
+private:
+    bool Create(wxFrame *parent,
+                const wxString& desc,
+                const wxBitmap& bitmap,
+                int numImages = 1)
+    {
+        if ( !wxFrame::Create(parent, wxID_ANY,
+                              wxString::Format(wxT("Image from %s"), desc),
+                              wxDefaultPosition, wxDefaultSize,
+                              wxDEFAULT_FRAME_STYLE | wxFULL_REPAINT_ON_RESIZE) )
+            return false;
+
+        m_bitmap = bitmap;
+        m_zoom = 1.;
+
+        wxMenu *menu = new wxMenu;
+        menu->Append(wxID_SAVEAS);
+        menu->AppendSeparator();
+        menu->AppendCheckItem(ID_PAINT_BG, wxT("&Paint background"),
+                              "Uncheck this for transparent images");
+        menu->AppendSeparator();
+        menu->Append(ID_RESIZE, wxT("&Fit to window\tCtrl-F"));
+        menu->Append(wxID_ZOOM_IN, "Zoom &in\tCtrl-+");
+        menu->Append(wxID_ZOOM_OUT, "Zoom &out\tCtrl--");
+        menu->Append(wxID_ZOOM_100, "Reset zoom to &100%\tCtrl-1");
+        menu->AppendSeparator();
+        menu->Append(ID_ROTATE_LEFT, wxT("Rotate &left\tCtrl-L"));
+        menu->Append(ID_ROTATE_RIGHT, wxT("Rotate &right\tCtrl-R"));
+
+        wxMenuBar *mbar = new wxMenuBar;
+        mbar->Append(menu, wxT("&Image"));
+        SetMenuBar(mbar);
+
+        mbar->Check(ID_PAINT_BG, true);
+
+        CreateStatusBar(2);
+        if ( numImages != 1 )
+            SetStatusText(wxString::Format("%d images", numImages), 1);
+

         SetClientSize(bitmap.GetWidth(), bitmap.GetHeight());
         SetClientSize(bitmap.GetWidth(), bitmap.GetHeight());

+
+        UpdateStatusBar();
+
+        Show();
+
+        return true;

     }
 
     void OnEraseBackground(wxEraseEvent& WXUNUSED(event))
     }
 
     void OnEraseBackground(wxEraseEvent& WXUNUSED(event))


@@ -160,84 +188,254 @@ public:
 
     void OnPaint(wxPaintEvent& WXUNUSED(event))
     {
 
     void OnPaint(wxPaintEvent& WXUNUSED(event))
     {

-        wxPaintDC dc( this );
-        dc.DrawBitmap( m_bitmap, 0, 0, TRUE /* use mask */ );
+        wxPaintDC dc(this);
+
+        if ( GetMenuBar()->IsChecked(ID_PAINT_BG) )
+            dc.Clear();
+
+        dc.SetUserScale(m_zoom, m_zoom);
+
+        const wxSize size = GetClientSize();
+        dc.DrawBitmap
+           (
+                m_bitmap,
+                dc.DeviceToLogicalX((size.x - m_zoom*m_bitmap.GetWidth())/2),
+                dc.DeviceToLogicalY((size.y - m_zoom*m_bitmap.GetHeight())/2),
+                true /* use mask */
+           );

     }
 
     }
 

-    void OnSave(wxMouseEvent& WXUNUSED(event))
+    void OnSave(wxCommandEvent& WXUNUSED(event))

     {
     {

+#if wxUSE_FILEDLG

         wxImage image = m_bitmap.ConvertToImage();
 
         wxImage image = m_bitmap.ConvertToImage();
 

-        int bppselection = wxGetSingleChoiceIndex(_T("Set BMP BPP"),
-                                                  _T("Set BMP BPP"),
-                                                  nChoices,
-                                                  bppchoices,
-                                                  this);
-        if ( bppselection == -1 )
-        {
-            // cancelled
-            return;
-        }
-
-        image.SetOption(wxIMAGE_OPTION_BMP_FORMAT, bppvalues[bppselection]);
-
-        wxString deffilename = bppchoices[bppselection];
-        deffilename.Replace(wxT(" "), wxT("_"));
-        deffilename += wxT(".bmp");

         wxString savefilename = wxFileSelector( wxT("Save Image"),
         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|")
-                                            wxT("ICO files (*.ico)|*.ico|")
-                                            wxT("CUR files (*.cur)|*.cur"),
-                                                wxSAVE);
+                                                wxEmptyString,
+                                                wxEmptyString,
+                                                wxEmptyString,
+                                                wxT("BMP files (*.bmp)|*.bmp|")
+#if wxUSE_LIBPNG
+                                                wxT("PNG files (*.png)|*.png|")
+#endif
+#if wxUSE_LIBJPEG
+                                                wxT("JPEG files (*.jpg)|*.jpg|")
+#endif
+#if wxUSE_GIF
+                                                wxT("GIF files (*.gif)|*.gif|")
+#endif
+#if wxUSE_LIBTIFF
+                                                wxT("TIFF files (*.tif)|*.tif|")
+#endif
+#if wxUSE_PCX
+                                                wxT("PCX files (*.pcx)|*.pcx|")
+#endif
+#if wxUSE_XPM
+                                                wxT("X PixMap files (*.xpm)|*.xpm|")
+#endif
+                                                wxT("ICO files (*.ico)|*.ico|")
+                                                wxT("CUR files (*.cur)|*.cur"),
+                                                wxFD_SAVE | wxFD_OVERWRITE_PROMPT,
+                                                this);

 
         if ( savefilename.empty() )
             return;
 
 
         if ( savefilename.empty() )
             return;
 

-        if ( image.GetOptionInt(wxIMAGE_OPTION_BMP_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));
+        wxString extension;
+        wxFileName::SplitPath(savefilename, NULL, NULL, &extension);

 
 

-            delete cmap;
+        bool saved = false;
+        if ( extension == wxT("bmp") )
+        {
+            static const int bppvalues[] =
+            {
+                wxBMP_1BPP,
+                wxBMP_1BPP_BW,
+                wxBMP_4BPP,
+                wxBMP_8BPP,
+                wxBMP_8BPP_GREY,
+                wxBMP_8BPP_RED,
+                wxBMP_8BPP_PALETTE,
+                wxBMP_24BPP
+            };
+
+            const wxString bppchoices[] =
+            {
+                wxT("1 bpp color"),
+                wxT("1 bpp B&W"),
+                wxT("4 bpp color"),
+                wxT("8 bpp color"),
+                wxT("8 bpp greyscale"),
+                wxT("8 bpp red"),
+                wxT("8 bpp own palette"),
+                wxT("24 bpp")
+            };
+
+            int bppselection = wxGetSingleChoiceIndex(wxT("Set BMP BPP"),
+                                                    wxT("Image sample: save file"),
+                                                    WXSIZEOF(bppchoices),
+                                                    bppchoices,
+                                                    this);
+            if ( bppselection != -1 )
+            {
+                int format = bppvalues[bppselection];
+                image.SetOption(wxIMAGE_OPTION_BMP_FORMAT, format);
+
+                if ( format == wxBMP_8BPP_PALETTE )
+                {
+                    unsigned char *cmap = new unsigned char [256];
+                    for ( int i = 0; i < 256; i++ )
+                        cmap[i] = (unsigned char)i;
+                    image.SetPalette(wxPalette(256, cmap, cmap, cmap));
+
+                    delete[] cmap;
+                }
+            }

         }
         }

-
-        bool loaded;
-        wxString extension = savefilename.AfterLast('.').Lower();
-
-        if (extension == _T("cur"))
+#if wxUSE_LIBPNG
+        else if ( extension == wxT("png") )
+        {
+            static const int pngvalues[] =
+            {
+                wxPNG_TYPE_COLOUR,
+                wxPNG_TYPE_COLOUR,
+                wxPNG_TYPE_GREY,
+                wxPNG_TYPE_GREY,
+                wxPNG_TYPE_GREY_RED,
+                wxPNG_TYPE_GREY_RED,
+            };
+
+            const wxString pngchoices[] =
+            {
+                wxT("Colour 8bpp"),
+                wxT("Colour 16bpp"),
+                wxT("Grey 8bpp"),
+                wxT("Grey 16bpp"),
+                wxT("Grey red 8bpp"),
+                wxT("Grey red 16bpp"),
+            };
+
+            int sel = wxGetSingleChoiceIndex(wxT("Set PNG format"),
+                                            wxT("Image sample: save file"),
+                                            WXSIZEOF(pngchoices),
+                                            pngchoices,
+                                            this);
+            if ( sel != -1 )
+            {
+                image.SetOption(wxIMAGE_OPTION_PNG_FORMAT, pngvalues[sel]);
+                image.SetOption(wxIMAGE_OPTION_PNG_BITDEPTH, sel % 2 ? 16 : 8);
+
+                // these values are taken from OptiPNG with -o3 switch
+                const wxString compressionChoices[] =
+                {
+                    wxT("compression = 9, memory = 8, strategy = 0, filter = 0"),
+                    wxT("compression = 9, memory = 9, strategy = 0, filter = 0"),
+                    wxT("compression = 9, memory = 8, strategy = 1, filter = 0"),
+                    wxT("compression = 9, memory = 9, strategy = 1, filter = 0"),
+                    wxT("compression = 1, memory = 8, strategy = 2, filter = 0"),
+                    wxT("compression = 1, memory = 9, strategy = 2, filter = 0"),
+                    wxT("compression = 9, memory = 8, strategy = 0, filter = 5"),
+                    wxT("compression = 9, memory = 9, strategy = 0, filter = 5"),
+                    wxT("compression = 9, memory = 8, strategy = 1, filter = 5"),
+                    wxT("compression = 9, memory = 9, strategy = 1, filter = 5"),
+                    wxT("compression = 1, memory = 8, strategy = 2, filter = 5"),
+                    wxT("compression = 1, memory = 9, strategy = 2, filter = 5"),
+                };
+
+                int sel = wxGetSingleChoiceIndex(wxT("Select compression option (Cancel to use default)\n"),
+                                                 wxT("PNG Compression Options"),
+                                                 WXSIZEOF(compressionChoices),
+                                                 compressionChoices,
+                                                 this);
+                if (sel != -1)
+                {
+                    const int zc[] = {9, 9, 9, 9, 1, 1, 9, 9, 9, 9, 1, 1};
+                    const int zm[] = {8, 9, 8, 9, 8, 9, 8, 9, 8, 9, 8, 9};
+                    const int zs[] = {0, 0, 1, 1, 2, 2, 0, 0, 1, 1, 2, 2};
+                    const int f[]  = {0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+                                      0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8};
+
+                    image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_LEVEL      , zc[sel]);
+                    image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_MEM_LEVEL  , zm[sel]);
+                    image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_STRATEGY   , zs[sel]);
+                    image.SetOption(wxIMAGE_OPTION_PNG_FILTER                 , f[sel]);
+                    image.SetOption(wxIMAGE_OPTION_PNG_COMPRESSION_BUFFER_SIZE, 1048576); // 1 MB
+                }
+            }
+        }
+#endif // wxUSE_LIBPNG
+        else if ( extension == wxT("cur") )

         {
             image.Rescale(32,32);
             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0);
             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 0);
             // This shows how you can save an image with explicitly
             // specified image format:
         {
             image.Rescale(32,32);
             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X, 0);
             image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y, 0);
             // This shows how you can save an image with explicitly
             // specified image format:

-            loaded = image.SaveFile(savefilename, wxBITMAP_TYPE_CUR);
+            saved = image.SaveFile(savefilename, wxBITMAP_TYPE_CUR);

         }
         }

-        else
+
+        if ( !saved )

         {
             // This one guesses image format from filename extension
             // (it may fail if the extension is not recognized):
         {
             // This one guesses image format from filename extension
             // (it may fail if the extension is not recognized):

-            loaded = image.SaveFile(savefilename);
+            image.SaveFile(savefilename);

         }
         }

+#endif // wxUSE_FILEDLG
+    }

 
 

-        if ( !loaded )
-            wxMessageBox(_T("No handler for this file type."),
-                         _T("File was not saved"),
-                         wxOK|wxCENTRE, this);
+    void OnResize(wxCommandEvent& WXUNUSED(event))
+    {
+        wxImage img(m_bitmap.ConvertToImage());
+
+        const wxSize size = GetClientSize();
+        img.Rescale(size.x, size.y, wxIMAGE_QUALITY_HIGH);
+        m_bitmap = wxBitmap(img);
+
+        UpdateStatusBar();
+    }
+
+    void OnZoom(wxCommandEvent& event)
+    {
+        if ( event.GetId() == wxID_ZOOM_IN )
+            m_zoom *= 1.2;
+        else if ( event.GetId() == wxID_ZOOM_OUT )
+            m_zoom /= 1.2;
+        else // wxID_ZOOM_100
+            m_zoom = 1.;
+
+        UpdateStatusBar();
+    }
+
+    void OnRotate(wxCommandEvent& event)
+    {
+        double angle = 5;
+        if ( event.GetId() == ID_ROTATE_LEFT )
+            angle = -angle;
+
+        wxImage img(m_bitmap.ConvertToImage());
+        img = img.Rotate(angle, wxPoint(img.GetWidth() / 2, img.GetHeight() / 2));
+        if ( !img.IsOk() )
+        {
+            wxLogWarning(wxT("Rotation failed"));
+            return;
+        }
+
+        m_bitmap = wxBitmap(img);
+
+        UpdateStatusBar();
+    }
+
+    void UpdateStatusBar()
+    {
+        wxLogStatus(this, wxT("Image size: (%d, %d), zoom %.2f"),
+                    m_bitmap.GetWidth(),
+                    m_bitmap.GetHeight(),
+                    m_zoom);
+        Refresh();

     }
 
     }
 

-private:

     wxBitmap m_bitmap;
     wxBitmap m_bitmap;

+    double m_zoom;

 
     DECLARE_EVENT_TABLE()
 };
 
     DECLARE_EVENT_TABLE()
 };


@@ -257,41 +455,101 @@ public:
     };
 
     MyRawBitmapFrame(wxFrame *parent)
     };
 
     MyRawBitmapFrame(wxFrame *parent)

-        : wxFrame(parent, -1, _T("Raw bitmaps (how exciting)")),
-          m_bitmap(SIZE, SIZE, 32)
+        : wxFrame(parent, wxID_ANY, wxT("Raw bitmaps (how exciting)")),
+        m_bitmap(SIZE, SIZE, 24),
+        m_alphaBitmap(SIZE, SIZE, 32)

     {
     {

-        SetClientSize(SIZE, SIZE);
+        SetClientSize(SIZE, SIZE*2+25);
+
+        InitAlphaBitmap();
+        InitBitmap();

 
 

-        // another possibility: wxNativePixelData (don't forget to remove code
-        // setting alpha in the loop below then)
-        typedef wxAlphaPixelData Data;
+    }

 
 

-        Data data(m_bitmap, wxPoint(BORDER, BORDER), wxSize(REAL_SIZE, REAL_SIZE));
+    void InitAlphaBitmap()
+    {
+        // First, clear the whole bitmap by making it alpha
+        {
+            wxAlphaPixelData data( m_alphaBitmap, wxPoint(0,0), wxSize(SIZE, SIZE) );
+            if ( !data )
+            {
+                wxLogError(wxT("Failed to gain raw access to bitmap data"));
+                return;
+            }
+            wxAlphaPixelData::Iterator p(data);
+            for ( int y = 0; y < SIZE; ++y )
+            {
+                wxAlphaPixelData::Iterator rowStart = p;
+                for ( int x = 0; x < SIZE; ++x )
+                {
+                    p.Alpha() = 0;
+                    ++p; // same as p.OffsetX(1)
+                }
+                p = rowStart;
+                p.OffsetY(data, 1);
+            }
+        }
+
+        // Then, draw colourful alpha-blended stripes
+        wxAlphaPixelData data(m_alphaBitmap, wxPoint(BORDER, BORDER),
+                            wxSize(REAL_SIZE, REAL_SIZE));

         if ( !data )
         {
         if ( !data )
         {

-            wxLogError(_T("Failed to gain raw access to bitmap data"));
+            wxLogError(wxT("Failed to gain raw access to bitmap data"));

             return;
         }
 
             return;
         }
 

-        data.UseAlpha();
-
-        Data::Iterator p(data);
+        wxAlphaPixelData::Iterator p(data);

 
         for ( int y = 0; y < REAL_SIZE; ++y )
         {
 
         for ( int y = 0; y < REAL_SIZE; ++y )
         {

-            Data::Iterator rowStart = p;
+            wxAlphaPixelData::Iterator rowStart = p;

 
             int r = y < REAL_SIZE/3 ? 255 : 0,
                 g = (REAL_SIZE/3 <= y) && (y < 2*(REAL_SIZE/3)) ? 255 : 0,
                 b = 2*(REAL_SIZE/3) <= y ? 255 : 0;
 
             for ( int x = 0; x < REAL_SIZE; ++x )
 
             int r = y < REAL_SIZE/3 ? 255 : 0,
                 g = (REAL_SIZE/3 <= y) && (y < 2*(REAL_SIZE/3)) ? 255 : 0,
                 b = 2*(REAL_SIZE/3) <= y ? 255 : 0;
 
             for ( int x = 0; x < REAL_SIZE; ++x )

+            {
+                // note that RGB must be premultiplied by alpha
+                unsigned a = (wxAlphaPixelData::Iterator::ChannelType)((x*255.)/REAL_SIZE);
+                p.Red() = r * a / 256;
+                p.Green() = g * a / 256;
+                p.Blue() = b * a / 256;
+                p.Alpha() = a;
+
+                ++p; // same as p.OffsetX(1)
+            }
+
+            p = rowStart;
+            p.OffsetY(data, 1);
+        }
+    }
+
+    void InitBitmap()
+    {
+        // draw some colourful stripes without alpha
+        wxNativePixelData data(m_bitmap);
+        if ( !data )
+        {
+            wxLogError(wxT("Failed to gain raw access to bitmap data"));
+            return;
+        }
+
+        wxNativePixelData::Iterator p(data);
+        for ( int y = 0; y < SIZE; ++y )
+        {
+            wxNativePixelData::Iterator rowStart = p;
+
+            int r = y < SIZE/3 ? 255 : 0,
+                g = (SIZE/3 <= y) && (y < 2*(SIZE/3)) ? 255 : 0,
+                b = 2*(SIZE/3) <= y ? 255 : 0;
+
+            for ( int x = 0; x < SIZE; ++x )

             {
                 p.Red() = r;
                 p.Green() = g;
                 p.Blue() = b;
             {
                 p.Red() = r;
                 p.Green() = g;
                 p.Blue() = b;

-                p.Alpha() = (Data::Iterator::ChannelType)((x*255.)/REAL_SIZE);
-

                 ++p; // same as p.OffsetX(1)
             }
 
                 ++p; // same as p.OffsetX(1)
             }
 


@@ -303,42 +561,50 @@ public:
     void OnPaint(wxPaintEvent& WXUNUSED(event))
     {
         wxPaintDC dc( this );
     void OnPaint(wxPaintEvent& WXUNUSED(event))
     {
         wxPaintDC dc( this );

-        dc.DrawText(_T("This is alpha and raw bitmap test"), 0, BORDER);
-        dc.DrawText(_T("This is alpha and raw bitmap test"), 0, SIZE/2 - BORDER);
-        dc.DrawText(_T("This is alpha and raw bitmap test"), 0, SIZE - 2*BORDER);
-        dc.DrawBitmap( m_bitmap, 0, 0, TRUE /* use mask */ );
+        dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, BORDER);
+        dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, SIZE/2 - BORDER);
+        dc.DrawText(wxT("This is alpha and raw bitmap test"), 0, SIZE - 2*BORDER);
+        dc.DrawBitmap( m_alphaBitmap, 0, 0, true /* use mask */ );
+
+        dc.DrawText(wxT("Raw bitmap access without alpha"), 0, SIZE+5);
+        dc.DrawBitmap( m_bitmap, 0, SIZE+5+dc.GetCharHeight());

     }
 
 private:
     wxBitmap m_bitmap;
     }
 
 private:
     wxBitmap m_bitmap;

+    wxBitmap m_alphaBitmap;

 
     DECLARE_EVENT_TABLE()
 };
 
 #endif // wxHAVE_RAW_BITMAP
 
 
     DECLARE_EVENT_TABLE()
 };
 
 #endif // wxHAVE_RAW_BITMAP
 

-// MyApp

 
 

-class MyApp: public wxApp
-{
-public:
-    virtual bool OnInit();
-};
+// ============================================================================
+// implementations
+// ============================================================================

 
 

-// main program
-
-IMPLEMENT_APP(MyApp)
-
-// MyCanvas
-
-IMPLEMENT_DYNAMIC_CLASS(MyCanvas, wxScrolledWindow)
+//-----------------------------------------------------------------------------
+// MyImageFrame
+//-----------------------------------------------------------------------------

 
 BEGIN_EVENT_TABLE(MyImageFrame, wxFrame)
     EVT_ERASE_BACKGROUND(MyImageFrame::OnEraseBackground)
     EVT_PAINT(MyImageFrame::OnPaint)
 
 BEGIN_EVENT_TABLE(MyImageFrame, wxFrame)
     EVT_ERASE_BACKGROUND(MyImageFrame::OnEraseBackground)
     EVT_PAINT(MyImageFrame::OnPaint)

-    EVT_LEFT_DCLICK(MyImageFrame::OnSave)
+
+    EVT_MENU(wxID_SAVEAS, MyImageFrame::OnSave)
+    EVT_MENU_RANGE(ID_ROTATE_LEFT, ID_ROTATE_RIGHT, MyImageFrame::OnRotate)
+    EVT_MENU(ID_RESIZE, MyImageFrame::OnResize)
+
+    EVT_MENU(wxID_ZOOM_IN, MyImageFrame::OnZoom)
+    EVT_MENU(wxID_ZOOM_OUT, MyImageFrame::OnZoom)
+    EVT_MENU(wxID_ZOOM_100, MyImageFrame::OnZoom)

 END_EVENT_TABLE()
 
 END_EVENT_TABLE()
 

+//-----------------------------------------------------------------------------
+// MyRawBitmapFrame
+//-----------------------------------------------------------------------------
+

 #ifdef wxHAVE_RAW_BITMAP
 
 BEGIN_EVENT_TABLE(MyRawBitmapFrame, wxFrame)
 #ifdef wxHAVE_RAW_BITMAP
 
 BEGIN_EVENT_TABLE(MyRawBitmapFrame, wxFrame)


@@ -347,602 +613,295 @@ END_EVENT_TABLE()
 
 #endif // wxHAVE_RAW_BITMAP
 
 
 #endif // wxHAVE_RAW_BITMAP
 

-BEGIN_EVENT_TABLE(MyCanvas, wxScrolledWindow)
-  EVT_PAINT(MyCanvas::OnPaint)
-END_EVENT_TABLE()
+//-----------------------------------------------------------------------------
+// MyFrame
+//-----------------------------------------------------------------------------

 
 

-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
+enum

 {
 {

-    my_horse_png = (wxBitmap*) NULL;
-    my_horse_jpeg = (wxBitmap*) NULL;
-    my_horse_gif = (wxBitmap*) NULL;
-    my_horse_bmp = (wxBitmap*) NULL;
-    my_horse_bmp2 = (wxBitmap*) NULL;
-    my_horse_pcx = (wxBitmap*) NULL;
-    my_horse_pnm = (wxBitmap*) NULL;
-    my_horse_tiff = (wxBitmap*) NULL;
-    my_horse_xpm = (wxBitmap*) NULL;
-    my_horse_ico32 = (wxBitmap*) NULL;
-    my_horse_ico16 = (wxBitmap*) NULL;
-    my_horse_ico = (wxBitmap*) NULL;
-    my_horse_cur = (wxBitmap*) NULL;
-    my_horse_ani = (wxBitmap*) NULL;
-
-    my_smile_xbm = (wxBitmap*) NULL;
-    my_square = (wxBitmap*) NULL;
-    my_anti = (wxBitmap*) 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();
+    ID_QUIT  = wxID_EXIT,
+    ID_ABOUT = wxID_ABOUT,
+    ID_NEW = 100,
+    ID_INFO,
+    ID_SHOWRAW,
+    ID_GRAPHICS,
+    ID_SHOWTHUMBNAIL
+};

 
 

-#if wxUSE_LIBPNG
-    if ( !image.SaveFile( dir + _T("test.png"), wxBITMAP_TYPE_PNG ))
-        wxLogError(wxT("Can't save file"));
+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)
+    EVT_MENU    (ID_INFO,  MyFrame::OnImageInfo)
+    EVT_MENU    (ID_SHOWTHUMBNAIL, MyFrame::OnThumbnail)
+#ifdef wxHAVE_RAW_BITMAP
+    EVT_MENU    (ID_SHOWRAW, MyFrame::OnTestRawBitmap)
+#endif
+#if wxUSE_GRAPHICS_CONTEXT
+    EVT_MENU    (ID_GRAPHICS, MyFrame::OnTestGraphics)
+#endif // wxUSE_GRAPHICS_CONTEXT
+#if wxUSE_CLIPBOARD
+    EVT_MENU(wxID_COPY, MyFrame::OnCopy)
+    EVT_MENU(wxID_PASTE, MyFrame::OnPaste)
+#endif // wxUSE_CLIPBOARD
+END_EVENT_TABLE()

 
 

-    image.Destroy();
+MyFrame::MyFrame()
+    : wxFrame( (wxFrame *)NULL, wxID_ANY, wxT("wxImage sample"),
+                wxPoint(20, 20), wxSize(950, 700) )
+{
+    SetIcon(wxICON(sample));

 
 

-    if ( image.LoadFile( dir + _T("test.png") ) )
-        my_square = new wxBitmap( image );
+    wxMenuBar *menu_bar = new wxMenuBar();

 
 

-    image.Destroy();
+    wxMenu *menuImage = new wxMenu;
+    menuImage->Append( ID_NEW, wxT("&Show any image...\tCtrl-O"));
+    menuImage->Append( ID_INFO, wxT("Show image &information...\tCtrl-I"));
+#ifdef wxHAVE_RAW_BITMAP
+    menuImage->AppendSeparator();
+    menuImage->Append( ID_SHOWRAW, wxT("Test &raw bitmap...\tCtrl-R"));
+#endif
+#if wxUSE_GRAPHICS_CONTEXT
+    menuImage->AppendSeparator();
+    menuImage->Append(ID_GRAPHICS, "Test &graphics context...\tCtrl-G");
+#endif // wxUSE_GRAPHICS_CONTEXT
+    menuImage->AppendSeparator();
+    menuImage->Append( ID_SHOWTHUMBNAIL, wxT("Test &thumbnail...\tCtrl-T"),
+                        "Test scaling the image during load (try with JPEG)");
+    menuImage->AppendSeparator();
+    menuImage->Append( ID_ABOUT, wxT("&About\tF1"));
+    menuImage->AppendSeparator();
+    menuImage->Append( ID_QUIT, wxT("E&xit\tCtrl-Q"));
+    menu_bar->Append(menuImage, wxT("&Image"));

 
 

-    if ( !image.LoadFile( dir + _T("horse.png")) )
-        wxLogError(wxT("Can't load PNG image"));
-    else
-        my_horse_png = new wxBitmap( image );
-#endif // wxUSE_LIBPNG
+#if wxUSE_CLIPBOARD
+    wxMenu *menuClipboard = new wxMenu;
+    menuClipboard->Append(wxID_COPY, wxT("&Copy test image\tCtrl-C"));
+    menuClipboard->Append(wxID_PASTE, wxT("&Paste image\tCtrl-V"));
+    menu_bar->Append(menuClipboard, wxT("&Clipboard"));
+#endif // wxUSE_CLIPBOARD

 
 

-#if wxUSE_LIBJPEG
-    image.Destroy();
+    SetMenuBar( menu_bar );

 
 

-    if ( !image.LoadFile( dir + _T("horse.jpg")) )
-        wxLogError(wxT("Can't load JPG image"));
-    else
-        my_horse_jpeg = new wxBitmap( image );
-#endif // wxUSE_LIBJPEG
+#if wxUSE_STATUSBAR
+    CreateStatusBar(2);
+    int widths[] = { -1, 100 };
+    SetStatusWidths( 2, widths );
+#endif // wxUSE_STATUSBAR

 
 

-#if wxUSE_GIF
-    image.Destroy();
+    m_canvas = new MyCanvas( this, wxID_ANY, wxPoint(0,0), wxSize(10,10) );

 
 

-    if ( !image.LoadFile( dir + _T("horse.gif" )) )
-        wxLogError(wxT("Can't load GIF image"));
-    else
-        my_horse_gif = new wxBitmap( image );
-#endif
+    // 500 width * 2750 height
+    m_canvas->SetScrollbars( 10, 10, 50, 275 );
+    m_canvas->SetCursor(wxImage("cursor.png"));
+}

 
 

-#if wxUSE_PCX
-    image.Destroy();
+void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
+{
+    Close( true );
+}

 
 

-    if ( !image.LoadFile( dir + _T("horse.pcx"), wxBITMAP_TYPE_PCX ) )
-        wxLogError(wxT("Can't load PCX image"));
-    else
-        my_horse_pcx = new wxBitmap( image );
+#if wxUSE_ZLIB && wxUSE_STREAMS
+#include "wx/zstream.h"

 #endif
 
 #endif
 

-    image.Destroy();
-
-    if ( !image.LoadFile( dir + _T("horse.bmp"), wxBITMAP_TYPE_BMP ) )
-        wxLogError(wxT("Can't load BMP image"));
-    else
-        my_horse_bmp = new wxBitmap( image );
+void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
+{
+    wxArrayString array;

 
 

-#if wxUSE_XPM
-    image.Destroy();
+    array.Add("wxImage demo");
+    array.Add("(c) Robert Roebling 1998-2005");
+    array.Add("(c) Vadim Zeitlin 2005-2009");

 
 

-    if ( !image.LoadFile( dir + _T("horse.xpm"), wxBITMAP_TYPE_XPM ) )
-        wxLogError(wxT("Can't load XPM image"));
-    else
-        my_horse_xpm = new wxBitmap( image );
+    array.Add(wxEmptyString);
+    array.Add("Version of the libraries used:");

 
 

-    if ( !image.SaveFile( dir + _T("test.xpm"), wxBITMAP_TYPE_XPM ))
-        wxLogError(wxT("Can't save file"));
+#if wxUSE_LIBPNG
+    array.Add(wxPNGHandler::GetLibraryVersionInfo().ToString());

 #endif
 #endif

-
-#if wxUSE_PNM
-    image.Destroy();
-
-    if ( !image.LoadFile( dir + _T("horse.pnm"), wxBITMAP_TYPE_PNM ) )
-        wxLogError(wxT("Can't load PNM image"));
-    else
-        my_horse_pnm = new wxBitmap( image );
+#if wxUSE_LIBJPEG
+    array.Add(wxJPEGHandler::GetLibraryVersionInfo().ToString());

 #endif
 #endif

-

 #if wxUSE_LIBTIFF
 #if wxUSE_LIBTIFF

-    image.Destroy();
-
-    if ( !image.LoadFile( dir + _T("horse.tif"), wxBITMAP_TYPE_TIF ) )
-        wxLogError(wxT("Can't load TIFF image"));
-    else
-        my_horse_tiff = new wxBitmap( image );
+    array.Add(wxTIFFHandler::GetLibraryVersionInfo().ToString());

 #endif
 #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(_T("saved.xpm"), wxBITMAP_TYPE_XPM);
+#if wxUSE_ZLIB && wxUSE_STREAMS
+    // zlib is used by libpng
+    array.Add(wxGetZlibVersionInfo().ToString());

 #endif
 #endif

+    (void)wxMessageBox( wxJoin(array, '\n'),
+                        "About wxImage Demo",
+                        wxICON_INFORMATION | wxOK );
+}

 
 

-#if wxUSE_ICO_CUR
-    image.Destroy();
-
-    if ( !image.LoadFile( dir + _T("horse.ico"), wxBITMAP_TYPE_ICO, 0 ) )
-        wxLogError(wxT("Can't load first ICO image"));
-    else
-        my_horse_ico32 = new wxBitmap( image );
-
-    image.Destroy();
-
-    if ( !image.LoadFile( dir + _T("horse.ico"), wxBITMAP_TYPE_ICO, 1 ) )
-        wxLogError(wxT("Can't load second ICO image"));
-    else
-        my_horse_ico16 = new wxBitmap( image );
-
-    image.Destroy();
-
-    if ( !image.LoadFile( dir + _T("horse.ico") ) )
-        wxLogError(wxT("Can't load best ICO image"));
-    else
-        my_horse_ico = new wxBitmap( image );
-
-    image.Destroy();
+wxString MyFrame::LoadUserImage(wxImage& image)
+{
+    wxString filename;

 
 

-    if ( !image.LoadFile( dir + _T("horse.cur"), wxBITMAP_TYPE_CUR ) )
-        wxLogError(wxT("Can't load best ICO image"));
-    else
+#if wxUSE_FILEDLG
+    filename = wxLoadFileSelector(wxT("image"), wxEmptyString);
+    if ( !filename.empty() )

     {
     {

-        my_horse_cur = new 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 + _T("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 + _T("horse3.ani"), wxBITMAP_TYPE_ANI, i ))
+        if ( !image.LoadFile(filename) )

         {
         {

-            wxString tmp = wxT("Can't load image number ");
-            tmp << i ;
-            wxLogError(tmp);
-        }
-        else    
-            my_horse_ani [i] = wxBitmap( image );
-    }
-#endif // wxUSE_ICO_CUR
+            wxLogError(wxT("Couldn't load image from '%s'."), filename.c_str());

 
 

-    image.Destroy();
-
-    // test image loading from stream
-    wxFile file(dir + _T("horse.bmp"));
-    if ( file.IsOpened() )
-    {
-        off_t len = file.Length();
-        void *data = malloc(len);
-        if ( file.Read(data, len) != len )
-            wxLogError(_T("Reading bitmap file failed"));
-        else
-        {
-            wxMemoryInputStream mis(data, len);
-            if ( !image.LoadFile(mis) )
-                wxLogError(wxT("Can't load BMP image from stream"));
-            else
-                my_horse_bmp2 = new wxBitmap( image );
+            return wxEmptyString;

         }
         }

-
-        free(data);

     }
     }

+#endif // wxUSE_FILEDLG
+
+    return filename;

 }
 
 }
 

-MyCanvas::~MyCanvas()
+void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) )

 {
 {

-    delete my_horse_pnm;
-    delete my_horse_png;
-    delete my_horse_jpeg;
-    delete my_horse_gif;
-    delete my_horse_bmp;
-    delete my_horse_bmp2;
-    delete my_horse_pcx;
-    delete my_horse_tiff;
-    delete my_horse_xpm;
-    delete my_horse_ico32;
-    delete my_horse_ico16;
-    delete my_horse_ico;
-    delete my_horse_cur;
-    delete [] my_horse_ani;
-    delete my_smile_xbm;
-    delete my_square;
-    delete my_anti;
+    wxImage image;
+    wxString filename = LoadUserImage(image);
+    if ( !filename.empty() )
+        new MyImageFrame(this, filename, image);

 }
 
 }
 

-void MyCanvas::OnPaint( wxPaintEvent &WXUNUSED(event) )
+void MyFrame::OnImageInfo( wxCommandEvent &WXUNUSED(event) )

 {
 {

-    wxPaintDC dc( this );
-    PrepareDC( dc );
-
-    dc.DrawText( _T("Loaded image"), 30, 10 );
-    if (my_square && my_square->Ok()) dc.DrawBitmap( *my_square, 30, 30 );
-
-    dc.DrawText( _T("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 && my_anti->Ok())
-        dc.DrawBitmap( *my_anti, 280, 30 );
-
-    dc.DrawText( _T("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( _T("GetSubBitmap()"), 280, 190 );
-        dc.DrawBitmap( sub, 280, 210 );
-    }
-
-    dc.DrawText( _T("JPEG handler"), 30, 365 );
-    if (my_horse_jpeg && my_horse_jpeg->Ok())
-        dc.DrawBitmap( *my_horse_jpeg, 30, 380 );
-
-    dc.DrawText( _T("GIF handler"), 30, 595 );
-    if (my_horse_gif && my_horse_gif->Ok())
-        dc.DrawBitmap( *my_horse_gif, 30, 610 );
-
-    dc.DrawText( _T("PCX handler"), 30, 825 );
-    if (my_horse_pcx && my_horse_pcx->Ok())
-        dc.DrawBitmap( *my_horse_pcx, 30, 840 );
-
-    dc.DrawText( _T("BMP handler"), 30, 1055 );
-    if (my_horse_bmp && my_horse_bmp->Ok())
-        dc.DrawBitmap( *my_horse_bmp, 30, 1070 );
-
-    dc.DrawText( _T("BMP read from memory"), 280, 1055 );
-    if (my_horse_bmp2 && my_horse_bmp2->Ok())
-        dc.DrawBitmap( *my_horse_bmp2, 280, 1070 );
-
-    dc.DrawText( _T("PNM handler"), 30, 1285 );
-    if (my_horse_pnm && my_horse_pnm->Ok())
-        dc.DrawBitmap( *my_horse_pnm, 30, 1300 );
-
-    dc.DrawText( _T("TIFF handler"), 30, 1515 );
-    if (my_horse_tiff && my_horse_tiff->Ok())
-        dc.DrawBitmap( *my_horse_tiff, 30, 1530 );
-
-    dc.DrawText( _T("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( _T("XBM bitmap"), 30, 1975 );
-        dc.DrawText( _T("(green on red)"), 30, 1990 );
-        dc.SetTextForeground( _T("GREEN") );
-        dc.SetTextBackground( _T("RED") );
-        dc.DrawBitmap( *my_smile_xbm, 30, 2010 );
-
-        dc.SetTextForeground( wxT("BLACK") );
-        dc.DrawText( _T("After wxImage conversion"), 150, 1975 );
-        dc.DrawText( _T("(red on white)"), 150, 1990 );
-        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), 150, 2010, TRUE );
-        dc.SetTextForeground( wxT("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 );
-#ifndef __WXGTK20__
-    // I cannot convince GTK2 to draw into mono bitmaps
-    memdc.DrawText( _T("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())
-    {
-        dc.DrawText( _T("Mono bitmap"), 30, 2095 );
-        dc.DrawText( _T("(red on green)"), 30, 2110 );
-        dc.SetTextForeground( wxT("RED") );
-        dc.SetTextBackground( wxT("GREEN") );
-        dc.DrawBitmap( mono, 30, 2130 );
-
-        dc.SetTextForeground( wxT("BLACK") );
-        dc.DrawText( _T("After wxImage conversion"), 150, 2095 );
-        dc.DrawText( _T("(red on white)"), 150, 2110 );
-        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), 150, 2130, TRUE );
-        dc.SetTextForeground( wxT("BLACK") );
-    }
-
-    // For testing transparency
-    dc.SetBrush( *wxRED_BRUSH );
-    dc.DrawRectangle( 20, 2220, 560, 68 );
-    
-    dc.DrawText(_T("XPM bitmap"), 30, 2230 );
-    if ( m_bmpSmileXpm.Ok() )
-        dc.DrawBitmap(m_bmpSmileXpm, 30, 2250, TRUE);
-
-    dc.DrawText(_T("XPM icon"), 110, 2230 );
-    if ( m_iconSmileXpm.Ok() )
-        dc.DrawIcon(m_iconSmileXpm, 110, 2250);
-    
-    // testing icon -> bitmap conversion    
-    wxBitmap to_blit( m_iconSmileXpm );
-
-    dc.DrawText( _T("SubBitmap"), 170, 2230 );
-    wxBitmap sub = to_blit.GetSubBitmap( wxRect(0,0,15,15) );
-    dc.DrawBitmap( sub, 170, 2250, TRUE );
-
-    dc.DrawText( _T("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( _T("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( _T("ICO handler (1st image)"), 30, 2290 );
-    if (my_horse_ico32 && my_horse_ico32->Ok())
-        dc.DrawBitmap( *my_horse_ico32, 30, 2330, TRUE );
-
-    dc.DrawText( _T("ICO handler (2nd image)"), 230, 2290 );
-    if (my_horse_ico16 && my_horse_ico16->Ok())
-        dc.DrawBitmap( *my_horse_ico16, 230, 2330, TRUE );
-
-    dc.DrawText( _T("ICO handler (best image)"), 430, 2290 );
-    if (my_horse_ico && my_horse_ico->Ok())
-        dc.DrawBitmap( *my_horse_ico, 430, 2330, TRUE );
-
-    dc.DrawText( _T("CUR handler"), 30, 2390 );
-    if (my_horse_cur && my_horse_cur->Ok())
+    wxImage image;
+    if ( !LoadUserImage(image).empty() )

     {
     {

-        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( _T("ANI handler"), 230, 2390 );
-    int i ;
-    for (i=0; i < m_ani_images; i ++)
-        if (my_horse_ani[i].Ok())
+        // TODO: show more information about the file
+        wxString info = wxString::Format("Image size: %dx%d",
+                                        image.GetWidth(),
+                                        image.GetHeight());
+
+        int xres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONX),
+            yres = image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONY);
+        if ( xres || yres )

         {
         {

-            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( _T("This is anti-aliased Text."), 20, 20 );
-  dc.DrawText( _T("And a Rectangle."), 20, 60 );
+            info += wxString::Format("\nResolution: %dx%d", xres, yres);
+            switch ( image.GetOptionInt(wxIMAGE_OPTION_RESOLUTIONUNIT) )
+            {
+                default:
+                    wxFAIL_MSG( "unknown image resolution units" );
+                    // fall through

 
 

-  dc.SetBrush( *wxRED_BRUSH );
-  dc.SetPen( *wxTRANSPARENT_PEN );
-  dc.DrawRoundedRectangle( 20, 100, 200, 180, 20 );
+                case wxIMAGE_RESOLUTION_NONE:
+                    info += " in default units";
+                    break;

 
 

-  wxImage original= bitmap.ConvertToImage();
-  wxImage anti( 150, 150 );
+                case wxIMAGE_RESOLUTION_INCHES:
+                    info += " in";
+                    break;

 
 

-  /* This is quite slow, but safe. Use wxImage::GetData() for speed instead. */
+                case wxIMAGE_RESOLUTION_CM:
+                    info += " cm";
+                    break;
+            }
+        }

 
 

-  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 );
+        wxLogMessage("%s", info);

     }
     }

-  my_anti = new wxBitmap(anti);

 }
 
 }
 

-// MyFrame
-
-enum
-{
-    ID_QUIT  = 108,
-    ID_ABOUT,
-    ID_NEW,
-    ID_SHOWRAW
-};
-
-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)

 #ifdef wxHAVE_RAW_BITMAP
 #ifdef wxHAVE_RAW_BITMAP

-  EVT_MENU    (ID_SHOWRAW,  MyFrame::OnTestRawBitmap)
-#endif
-
-#if wxUSE_CLIPBOARD
-    EVT_MENU(wxID_COPY, MyFrame::OnCopy)
-    EVT_MENU(wxID_PASTE, MyFrame::OnPaste)
-#endif // wxUSE_CLIPBOARD
-END_EVENT_TABLE()

 
 

-MyFrame::MyFrame()
-       : wxFrame( (wxFrame *)NULL, -1, _T("wxImage sample"),
-                  wxPoint(20,20), wxSize(470,360) )
+void MyFrame::OnTestRawBitmap( wxCommandEvent &WXUNUSED(event) )

 {
 {

-  wxMenuBar *menu_bar = new wxMenuBar();
-
-  wxMenu *menuImage = new wxMenu;
-  menuImage->Append( ID_NEW, _T("&Show any image...\tCtrl-O"));
+    (new MyRawBitmapFrame(this))->Show();
+}

 
 

-#ifdef wxHAVE_RAW_BITMAP
-  menuImage->Append( ID_SHOWRAW, _T("Test &raw bitmap...\tCtrl-R"));
-#endif
-  menuImage->AppendSeparator();
-  menuImage->Append( ID_ABOUT, _T("&About..."));
-  menuImage->AppendSeparator();
-  menuImage->Append( ID_QUIT, _T("E&xit\tCtrl-Q"));
-  menu_bar->Append(menuImage, _T("&Image"));
+#endif // wxHAVE_RAW_BITMAP

 
 

-#if wxUSE_CLIPBOARD
-  wxMenu *menuClipboard = new wxMenu;
-  menuClipboard->Append(wxID_COPY, _T("&Copy test image\tCtrl-C"));
-  menuClipboard->Append(wxID_PASTE, _T("&Paste image\tCtrl-V"));
-  menu_bar->Append(menuClipboard, _T("&Clipboard"));
-#endif // wxUSE_CLIPBOARD
+#if wxUSE_GRAPHICS_CONTEXT

 
 

-  SetMenuBar( menu_bar );
+class MyGraphicsFrame : public wxFrame
+{
+public:
+    enum
+    {
+        WIDTH = 256,
+        HEIGHT = 90
+    };

 
 

-  CreateStatusBar(2);
-  int widths[] = { -1, 100 };
-  SetStatusWidths( 2, widths );
+    MyGraphicsFrame(wxWindow* parent) :
+        wxFrame(parent, wxID_ANY, "Graphics context test"),
+        m_image(WIDTH, HEIGHT, false)
+    {
+        // Create a test image: it has 3 horizontal primary colour bands with
+        // alpha increasing from left to right.
+        m_image.SetAlpha();
+        unsigned char* alpha = m_image.GetAlpha();
+        unsigned char* data = m_image.GetData();

 
 

-  m_canvas = new MyCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
+        for ( int y = 0; y < HEIGHT; y++ )
+        {
+            unsigned char r = 0,
+                          g = 0,
+                          b = 0;
+            if ( y < HEIGHT/3 )
+                r = 0xff;
+            else if ( y < (2*HEIGHT)/3 )
+                g = 0xff;
+            else
+                b = 0xff;

 
 

-  // 500 width * 2500 height
-  m_canvas->SetScrollbars( 10, 10, 50, 250 );
-}
+            for ( int x = 0; x < WIDTH; x++ )
+            {
+                *alpha++ = x;
+                *data++ = r;
+                *data++ = g;
+                *data++ = b;
+            }
+        }

 
 

-void MyFrame::OnQuit( wxCommandEvent &WXUNUSED(event) )
-{
-  Close( TRUE );
-}
+        m_bitmap = wxBitmap(m_image);

 
 

-void MyFrame::OnAbout( wxCommandEvent &WXUNUSED(event) )
-{
-  (void)wxMessageBox( _T("wxImage demo\n")
-                      _T("Robert Roebling (c) 1998,2000"),
-                      _T("About wxImage Demo"), wxICON_INFORMATION | wxOK );
-}
+        Connect(wxEVT_PAINT, wxPaintEventHandler(MyGraphicsFrame::OnPaint));

 
 

-void MyFrame::OnNewFrame( wxCommandEvent &WXUNUSED(event) )
-{
-    wxString filename = wxFileSelector(_T("Select image file"));
-    if ( !filename )
-        return;
+        Show();
+    }

 
 

-    wxImage image;
-    if ( !image.LoadFile(filename) )
+private:
+    void OnPaint(wxPaintEvent& WXUNUSED(event))

     {
     {

-        wxLogError(_T("Couldn't load image from '%s'."), filename.c_str());
-
-        return;
+        wxPaintDC dc(this);
+        wxScopedPtr<wxGraphicsContext> gc(wxGraphicsContext::Create(dc));
+        wxGraphicsBitmap gb(gc->CreateBitmapFromImage(m_image));
+
+        gc->SetFont(*wxNORMAL_FONT, *wxBLACK);
+        gc->DrawText("Bitmap", 0, HEIGHT/2);
+        gc->DrawBitmap(m_bitmap, 0, 0, WIDTH, HEIGHT);
+
+        wxGraphicsFont gf = gc->CreateFont(wxNORMAL_FONT->GetPixelSize().y, "");
+        gc->SetFont(gf);
+        gc->DrawText("Graphics bitmap", 0, (3*HEIGHT)/2);
+        gc->DrawBitmap(gb, 0, HEIGHT, WIDTH, HEIGHT);

     }
 
     }
 

-    (new MyImageFrame(this, wxBitmap(image)))->Show();
-}
+    wxImage m_image;
+    wxBitmap m_bitmap;

 
 

-#ifdef wxHAVE_RAW_BITMAP
+    wxDECLARE_NO_COPY_CLASS(MyGraphicsFrame);
+};

 
 

-void MyFrame::OnTestRawBitmap( wxCommandEvent &WXUNUSED(event) )
+void MyFrame::OnTestGraphics(wxCommandEvent& WXUNUSED(event))

 {
 {

-    (new MyRawBitmapFrame(this))->Show();
+    new MyGraphicsFrame(this);

 }
 
 }
 

-#endif // wxHAVE_RAW_BITMAP
+#endif // wxUSE_GRAPHICS_CONTEXT

 
 #if wxUSE_CLIPBOARD
 
 void MyFrame::OnCopy(wxCommandEvent& WXUNUSED(event))
 {
     wxBitmapDataObject *dobjBmp = new wxBitmapDataObject;
 
 #if wxUSE_CLIPBOARD
 
 void MyFrame::OnCopy(wxCommandEvent& WXUNUSED(event))
 {
     wxBitmapDataObject *dobjBmp = new wxBitmapDataObject;

-    dobjBmp->SetBitmap(*m_canvas->my_horse_png);
+    dobjBmp->SetBitmap(m_canvas->my_horse_png);

 
     wxTheClipboard->Open();
 
     if ( !wxTheClipboard->SetData(dobjBmp) )
     {
 
     wxTheClipboard->Open();
 
     if ( !wxTheClipboard->SetData(dobjBmp) )
     {

-        wxLogError(_T("Failed to copy bitmap to clipboard"));
+        wxLogError(wxT("Failed to copy bitmap to clipboard"));

     }
 
     wxTheClipboard->Close();
     }
 
     wxTheClipboard->Close();


@@ -955,60 +914,67 @@ void MyFrame::OnPaste(wxCommandEvent& WXUNUSED(event))
     wxTheClipboard->Open();
     if ( !wxTheClipboard->GetData(dobjBmp) )
     {
     wxTheClipboard->Open();
     if ( !wxTheClipboard->GetData(dobjBmp) )
     {

-        wxLogMessage(_T("No bitmap data in the clipboard"));
+        wxLogMessage(wxT("No bitmap data in the clipboard"));

     }
     else
     {
     }
     else
     {

-        (new MyImageFrame(this, dobjBmp.GetBitmap()))->Show();
+        new MyImageFrame(this, wxT("Clipboard"), dobjBmp.GetBitmap());

     }
     wxTheClipboard->Close();
 }
 
 #endif // wxUSE_CLIPBOARD
 
     }
     wxTheClipboard->Close();
 }
 
 #endif // wxUSE_CLIPBOARD
 

-//-----------------------------------------------------------------------------
-// MyApp
-//-----------------------------------------------------------------------------
-
-bool MyApp::OnInit()
+void MyFrame::OnThumbnail( wxCommandEvent &WXUNUSED(event) )

 {
 {

-#if wxUSE_LIBPNG
-  wxImage::AddHandler( new wxPNGHandler );
-#endif
+#if wxUSE_FILEDLG
+    wxString filename = wxLoadFileSelector(wxT("image"), wxEmptyString, wxEmptyString, this);
+    if ( filename.empty() )
+        return;

 
 

-#if wxUSE_LIBJPEG
-  wxImage::AddHandler( new wxJPEGHandler );
-#endif
+    static const int THUMBNAIL_WIDTH = 320;
+    static const int THUMBNAIL_HEIGHT = 240;

 
 

-#if wxUSE_LIBTIFF
-  wxImage::AddHandler( new wxTIFFHandler );
-#endif
+    wxImage image;
+    image.SetOption(wxIMAGE_OPTION_MAX_WIDTH, THUMBNAIL_WIDTH);
+    image.SetOption(wxIMAGE_OPTION_MAX_HEIGHT, THUMBNAIL_HEIGHT);

 
 

-#if wxUSE_GIF
-  wxImage::AddHandler( new wxGIFHandler );
-#endif
+    wxStopWatch sw;
+    if ( !image.LoadFile(filename) )
+    {
+        wxLogError(wxT("Couldn't load image from '%s'."), filename.c_str());
+        return;
+    }

 
 

-#if wxUSE_PCX
-  wxImage::AddHandler( new wxPCXHandler );
-#endif
+    int origWidth = image.GetOptionInt( wxIMAGE_OPTION_ORIGINAL_WIDTH );
+    int origHeight = image.GetOptionInt( wxIMAGE_OPTION_ORIGINAL_HEIGHT );

 
 

-#if wxUSE_PNM
-  wxImage::AddHandler( new wxPNMHandler );
-#endif
+    const long loadTime = sw.Time();

 
 

-#if wxUSE_XPM
-  wxImage::AddHandler( new wxXPMHandler );
-#endif
+    MyImageFrame * const frame = new MyImageFrame(this, filename, image);
+    wxLogStatus(frame, "Loaded \"%s\" in %ldms; original size was (%d, %d)",
+                filename, loadTime, origWidth, origHeight);
+#else
+    wxLogError( wxT("Couldn't create file selector dialog") );
+    return;
+#endif // wxUSE_FILEDLG
+}

 
 

-#if wxUSE_ICO_CUR
-  wxImage::AddHandler( new wxICOHandler );
-  wxImage::AddHandler( new wxCURHandler );
-  wxImage::AddHandler( new wxANIHandler );
-#endif
+//-----------------------------------------------------------------------------
+// MyApp
+//-----------------------------------------------------------------------------

 
 

-  wxFrame *frame = new MyFrame();
-  frame->Show( TRUE );
+IMPLEMENT_APP(MyApp)

 
 

-  return TRUE;
-}
+bool MyApp::OnInit()
+{
+    if ( !wxApp::OnInit() )
+        return false;
+
+    wxInitAllImageHandlers();

 
 

+    wxFrame *frame = new MyFrame();
+    frame->Show( true );
+
+    return true;
+}