X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ce3ed50dbe32d118321082db84c3a9abb047d5b7..b9efe021b554fa3967d1442cf758435c5cd5ae8f:/src/common/image.cpp

diff --git a/src/common/image.cpp b/src/common/image.cpp
index 853182a888..cf35689226 100644
--- a/src/common/image.cpp
+++ b/src/common/image.cpp
@@ -7,7 +7,7 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
 #pragma implementation "image.h"
 #endif
 
@@ -15,97 +15,150 @@
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
-#pragma hdrstop
+    #pragma hdrstop
 #endif
 
+#include "wx/defs.h"
+
+#if wxUSE_IMAGE
+
 #include "wx/image.h"
 #include "wx/bitmap.h"
 #include "wx/debug.h"
 #include "wx/log.h"
 #include "wx/app.h"
-#ifdef wxUSE_LIBPNG
-#include "../png/png.h"
-#endif
 #include "wx/filefn.h"
 #include "wx/wfstream.h"
 #include "wx/intl.h"
+#include "wx/module.h"
+#include "wx/hash.h"
+#include "wx/utils.h"
+#include "wx/math.h"
 
-#ifdef __SALFORDC__
-#ifdef FAR
-#undef FAR
-#endif
+#if wxUSE_XPM
+#include "wx/xpmdecod.h"
 #endif
 
-#ifdef __WXMSW__
-#include <windows.h>
+// For memcpy
+#include <string.h>
+
+#ifdef __SALFORDC__
+    #undef FAR
 #endif
 
+
 //-----------------------------------------------------------------------------
 // wxImage
 //-----------------------------------------------------------------------------
 
 class wxImageRefData: public wxObjectRefData
 {
-
 public:
-  wxImageRefData(void);
-  ~wxImageRefData(void);
-
-  int             m_width;
-  int             m_height;
-  unsigned char  *m_data;
-  bool            m_hasMask;
-  unsigned char   m_maskRed,m_maskGreen,m_maskBlue;
-  bool            m_ok;
+    wxImageRefData();
+    virtual ~wxImageRefData();
+
+    int             m_width;
+    int             m_height;
+    unsigned char  *m_data;
+
+    bool            m_hasMask;
+    unsigned char   m_maskRed,m_maskGreen,m_maskBlue;
+
+    // alpha channel data, may be NULL for the formats without alpha support
+    unsigned char  *m_alpha;
+
+    bool            m_ok;
+
+    // if true, m_data is pointer to static data and shouldn't be freed
+    bool            m_static;
+
+    // same as m_static but for m_alpha
+    bool            m_staticAlpha;
+
+#if wxUSE_PALETTE
+    wxPalette       m_palette;
+#endif // wxUSE_PALETTE
+
+    wxArrayString   m_optionNames;
+    wxArrayString   m_optionValues;
+
+    DECLARE_NO_COPY_CLASS(wxImageRefData)
 };
 
-wxImageRefData::wxImageRefData(void)
+wxImageRefData::wxImageRefData()
 {
     m_width = 0;
     m_height = 0;
-    m_data = (unsigned char*) NULL;
-    m_ok = FALSE;
+    m_data =
+    m_alpha = (unsigned char *) NULL;
+
     m_maskRed = 0;
     m_maskGreen = 0;
     m_maskBlue = 0;
-    m_hasMask = FALSE;
+    m_hasMask = false;
+
+    m_ok = false;
+    m_static =
+    m_staticAlpha = false;
 }
 
-wxImageRefData::~wxImageRefData(void)
+wxImageRefData::~wxImageRefData()
 {
-    if (m_data) free( m_data );
+    if ( !m_static )
+        free( m_data );
+    if ( !m_staticAlpha )
+        free( m_alpha );
 }
 
 wxList wxImage::sm_handlers;
 
+wxImage wxNullImage;
+
 //-----------------------------------------------------------------------------
 
 #define M_IMGDATA ((wxImageRefData *)m_refData)
 
-#if !USE_SHARED_LIBRARIES
 IMPLEMENT_DYNAMIC_CLASS(wxImage, wxObject)
-#endif
 
-wxImage::wxImage()
+wxImage::wxImage( int width, int height, bool clear )
+{
+    Create( width, height, clear );
+}
+
+wxImage::wxImage( int width, int height, unsigned char* data, bool static_data )
+{
+    Create( width, height, data, static_data );
+}
+
+wxImage::wxImage( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data )
+{
+    Create( width, height, data, alpha, static_data );
+}
+
+wxImage::wxImage( const wxString& name, long type, int index )
 {
+    LoadFile( name, type, index );
 }
 
-wxImage::wxImage( int width, int height )
+wxImage::wxImage( const wxString& name, const wxString& mimetype, int index )
 {
-    Create( width, height );
+    LoadFile( name, mimetype, index );
 }
 
-wxImage::wxImage( const wxString& name, long type )
+#if wxUSE_STREAMS
+wxImage::wxImage( wxInputStream& stream, long type, int index )
 {
-    LoadFile( name, type );
+    LoadFile( stream, type, index );
 }
 
-wxImage::wxImage( wxInputStream& stream, long type )
+wxImage::wxImage( wxInputStream& stream, const wxString& mimetype, int index )
 {
-    LoadFile( stream, type );
+    LoadFile( stream, mimetype, index );
 }
+#endif // wxUSE_STREAMS
 
 wxImage::wxImage( const wxImage& image )
+    : wxObject()
 {
     Ref(image);
 }
@@ -115,1927 +168,2128 @@ wxImage::wxImage( const wxImage* image )
     if (image) Ref(*image);
 }
 
-void wxImage::Create( int width, int height )
+wxImage::wxImage( const char** xpmData )
 {
-    m_refData = new wxImageRefData();
-
-    M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 );
-    if (M_IMGDATA->m_data)
-    {
-        for (int l = 0; l < width*height*3; l++) M_IMGDATA->m_data[l] = 0;
-
-        M_IMGDATA->m_width = width;
-        M_IMGDATA->m_height = height;
-        M_IMGDATA->m_ok = TRUE;
-    }
-    else
-    {
-        UnRef();
-    }
+    Create(xpmData);
 }
 
-void wxImage::Destroy()
+wxImage::wxImage( char** xpmData )
 {
-    UnRef();
+    Create((const char**) xpmData);
 }
 
-wxImage wxImage::Scale( int width, int height )
+bool wxImage::Create( const char** xpmData )
 {
-    wxImage image;
-
-    wxCHECK_MSG( Ok(), image, "invlaid image" );
-
-    wxCHECK_MSG( (width > 0) && (height > 0), image, "invalid image size" );
-
-    image.Create( width, height );
-
-    char unsigned *data = image.GetData();
+#if wxUSE_XPM
+    UnRef();
 
-    wxCHECK_MSG( data, image, "unable to create image" );
+    wxXPMDecoder decoder;
+    (*this) = decoder.ReadData(xpmData);
+    return Ok();
+#else
+    return false;
+#endif
+}
 
-    if (M_IMGDATA->m_hasMask)
-        image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+bool wxImage::Create( int width, int height, bool clear )
+{
+    UnRef();
 
-    double xscale = (double)width / (double)M_IMGDATA->m_width;
-    double yscale = (double)height / (double)M_IMGDATA->m_height;
+    m_refData = new wxImageRefData();
 
-    for (int j = 0; j < height; j++)
+    M_IMGDATA->m_data = (unsigned char *) malloc( width*height*3 );
+    if (!M_IMGDATA->m_data)
     {
-        for (int i = 0; i < width; i++)
-        {
-            int new_pos = 3*(j*width + i);
-            int old_pos = 3*((long)(j/yscale)*M_IMGDATA->m_width + (long)(i/xscale));
-            data[ new_pos   ] = M_IMGDATA->m_data[ old_pos   ];
-            data[ new_pos+1 ] = M_IMGDATA->m_data[ old_pos+1 ];
-            data[ new_pos+2 ] = M_IMGDATA->m_data[ old_pos+2 ];
-        }
+        UnRef();
+        return false;
     }
 
-    return image;
-}
-
-void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
-{
-    wxCHECK_RET( Ok(), "invalid image" );
-
-    int w = M_IMGDATA->m_width;
-    int h = M_IMGDATA->m_height;
+    if (clear)
+        memset(M_IMGDATA->m_data, 0, width*height*3);
 
-    wxCHECK_RET( (x>=0) && (y>=0) && (x<w) && (y<h), "invalid image index" );
+    M_IMGDATA->m_width = width;
+    M_IMGDATA->m_height = height;
+    M_IMGDATA->m_ok = true;
 
-    long pos = (y * w + x) * 3;
-
-    M_IMGDATA->m_data[ pos   ] = r;
-    M_IMGDATA->m_data[ pos+1 ] = g;
-    M_IMGDATA->m_data[ pos+2 ] = b;
+    return true;
 }
 
-unsigned char wxImage::GetRed( int x, int y )
+bool wxImage::Create( int width, int height, unsigned char* data, bool static_data )
 {
-    wxCHECK_MSG( Ok(), 0, "invalid image" );
+    UnRef();
 
-    int w = M_IMGDATA->m_width;
-    int h = M_IMGDATA->m_height;
+    wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") );
 
-    wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, "invalid image index" );
+    m_refData = new wxImageRefData();
 
-    long pos = (y * w + x) * 3;
+    M_IMGDATA->m_data = data;
+    M_IMGDATA->m_width = width;
+    M_IMGDATA->m_height = height;
+    M_IMGDATA->m_ok = true;
+    M_IMGDATA->m_static = static_data;
 
-    return M_IMGDATA->m_data[pos];
+    return true;
 }
 
-unsigned char wxImage::GetGreen( int x, int y )
+bool wxImage::Create( int width, int height, unsigned char* data, unsigned char* alpha, bool static_data )
 {
-    wxCHECK_MSG( Ok(), 0, "invalid image" );
+    UnRef();
 
-    int w = M_IMGDATA->m_width;
-    int h = M_IMGDATA->m_height;
+    wxCHECK_MSG( data, false, _T("NULL data in wxImage::Create") );
 
-    wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, "invalid image index" );
+    m_refData = new wxImageRefData();
 
-    long pos = (y * w + x) * 3;
+    M_IMGDATA->m_data = data;
+    M_IMGDATA->m_alpha = alpha;
+    M_IMGDATA->m_width = width;
+    M_IMGDATA->m_height = height;
+    M_IMGDATA->m_ok = true;
+    M_IMGDATA->m_static = static_data;
 
-    return M_IMGDATA->m_data[pos+1];
+    return true;
 }
 
-unsigned char wxImage::GetBlue( int x, int y )
+void wxImage::Destroy()
 {
-    wxCHECK_MSG( Ok(), 0, "invalid image" );
-
-    int w = M_IMGDATA->m_width;
-    int h = M_IMGDATA->m_height;
-
-    wxCHECK_MSG( (x>=0) && (y>=0) && (x<w) && (y<h), 0, "invalid image index" );
-
-    long pos = (y * w + x) * 3;
-
-    return M_IMGDATA->m_data[pos+2];
+    UnRef();
 }
 
-bool wxImage::Ok() const
+wxImage wxImage::Copy() const
 {
-    return (M_IMGDATA && M_IMGDATA->m_ok);
-}
+    wxImage image;
 
-char unsigned *wxImage::GetData() const
-{
-    wxCHECK_MSG( Ok(), (char unsigned *)NULL, "invalid image" );
+    wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 
-    return M_IMGDATA->m_data;
-}
+    image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
 
-void wxImage::SetData( char unsigned *WXUNUSED(data) )
-{
-    wxCHECK_RET( Ok(), "invalid image" );
-}
+    unsigned char *data = image.GetData();
 
-void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
-{
-    wxCHECK_RET( Ok(), "invalid image" );
+    wxCHECK_MSG( data, image, wxT("unable to create image") );
 
-    M_IMGDATA->m_maskRed = r;
-    M_IMGDATA->m_maskGreen = g;
-    M_IMGDATA->m_maskBlue = b;
-    M_IMGDATA->m_hasMask = TRUE;
-}
+    image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
+    image.SetMask( M_IMGDATA->m_hasMask );
 
-unsigned char wxImage::GetMaskRed() const
-{
-    wxCHECK_MSG( Ok(), 0, "invalid image" );
+    memcpy( data, GetData(), M_IMGDATA->m_width*M_IMGDATA->m_height*3 );
 
-    return M_IMGDATA->m_maskRed;
+    // also copy the image options
+    wxImageRefData *imgData = (wxImageRefData *)image.m_refData;
+    imgData->m_optionNames = M_IMGDATA->m_optionNames;
+    imgData->m_optionValues = M_IMGDATA->m_optionValues;
+
+    return image;
 }
 
-unsigned char wxImage::GetMaskGreen() const
+wxImage wxImage::ShrinkBy( int xFactor , int yFactor ) const
 {
-    wxCHECK_MSG( Ok(), 0, "invalid image" );
+    if( xFactor == 1 && yFactor == 1 )
+        return Copy() ;
 
-    return M_IMGDATA->m_maskGreen;
-}
+    wxImage image;
 
-unsigned char wxImage::GetMaskBlue() const
-{
-    wxCHECK_MSG( Ok(), 0, "invalid image" );
+    wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 
-    return M_IMGDATA->m_maskBlue;
-}
+    // can't scale to/from 0 size
+    wxCHECK_MSG( (xFactor > 0) && (yFactor > 0), image,
+                 wxT("invalid new image size") );
 
-void wxImage::SetMask( bool mask )
-{
-    wxCHECK_RET( Ok(), "invalid image" );
+    long old_height = M_IMGDATA->m_height,
+         old_width  = M_IMGDATA->m_width;
 
-    M_IMGDATA->m_hasMask = mask;
-}
+    wxCHECK_MSG( (old_height > 0) && (old_width > 0), image,
+                 wxT("invalid old image size") );
 
-bool wxImage::HasMask() const
-{
-    wxCHECK_MSG( Ok(), FALSE, "invalid image" );
+    long width = old_width / xFactor ;
+    long height = old_height / yFactor ;
 
-    return M_IMGDATA->m_hasMask;
-}
+    image.Create( width, height, false );
 
-int wxImage::GetWidth() const
-{
-    wxCHECK_MSG( Ok(), 0, "invalid image" );
+    char unsigned *data = image.GetData();
 
-    return M_IMGDATA->m_width;
-}
+    wxCHECK_MSG( data, image, wxT("unable to create image") );
 
-int wxImage::GetHeight() const
-{
-    wxCHECK_MSG( Ok(), 0, "invalid image" );
+    bool hasMask = false ;
+    unsigned char maskRed = 0;
+    unsigned char maskGreen = 0;
+    unsigned char maskBlue =0 ;
 
-    return M_IMGDATA->m_height;
-}
+    unsigned char *source_data = M_IMGDATA->m_data;
+    unsigned char *target_data = data;
+    unsigned char *source_alpha = 0 ;
+    unsigned char *target_alpha = 0 ;
+    if (M_IMGDATA->m_hasMask)
+    {
+        hasMask = true ;
+        maskRed = M_IMGDATA->m_maskRed;
+        maskGreen = M_IMGDATA->m_maskGreen;
+        maskBlue =M_IMGDATA->m_maskBlue ;
+
+        image.SetMaskColour( M_IMGDATA->m_maskRed,
+                             M_IMGDATA->m_maskGreen,
+                             M_IMGDATA->m_maskBlue );
+    }
+    else
+    {
+        source_alpha = M_IMGDATA->m_alpha ;
+        if ( source_alpha )
+        {
+            image.SetAlpha() ;
+            target_alpha = image.GetAlpha() ;
+        }
+    }
 
-bool wxImage::LoadFile( const wxString& filename, long type )
-{
-    if (wxFileExists(filename))
+    for (long y = 0; y < height; y++)
     {
-        wxFileInputStream stream(filename);
-        return LoadFile(stream, type);
+        for (long x = 0; x < width; x++)
+        {
+            unsigned long avgRed = 0 ;
+            unsigned long avgGreen = 0;
+            unsigned long avgBlue = 0;
+            unsigned long avgAlpha = 0 ;
+            unsigned long counter = 0 ;
+            // determine average
+            for ( int y1 = 0 ; y1 < yFactor ; ++y1 )
+            {
+                long y_offset = (y * yFactor + y1) * old_width;
+                for ( int x1 = 0 ; x1 < xFactor ; ++x1 )
+                {
+                    unsigned char *pixel = source_data + 3 * ( y_offset + x * xFactor + x1 ) ;
+                    unsigned char red = pixel[0] ;
+                    unsigned char green = pixel[1] ;
+                    unsigned char blue = pixel[2] ;
+                    unsigned char alpha = 255  ;
+                    if ( source_alpha )
+                        alpha = *(source_alpha + y_offset + x * xFactor + x1) ;
+                    if ( !hasMask || red != maskRed || green != maskGreen || blue != maskBlue )
+                    {
+                        if ( alpha > 0 )
+                        {
+                            avgRed += red ;
+                            avgGreen += green ;
+                            avgBlue += blue ;
+                        }
+                        avgAlpha += alpha ;
+                        counter++ ;
+                    }
+                }
+            }
+            if ( counter == 0 )
+            {
+                *(target_data++) = M_IMGDATA->m_maskRed ;
+                *(target_data++) = M_IMGDATA->m_maskGreen ;
+                *(target_data++) = M_IMGDATA->m_maskBlue ;
+            }
+            else
+            {
+                if ( source_alpha )
+                    *(target_alpha++) = (unsigned char)(avgAlpha / counter ) ;
+                *(target_data++) = (unsigned char)(avgRed / counter);
+                *(target_data++) = (unsigned char)(avgGreen / counter);
+                *(target_data++) = (unsigned char)(avgBlue / counter);
+            }
+        }
     }
 
-    else {
-        wxLogWarning( "Image file does not exist." );
+    // In case this is a cursor, make sure the hotspot is scalled accordingly:
+    if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) )
+        image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X,
+                (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X))/xFactor);
+    if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) )
+        image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y,
+                (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y))/yFactor);
 
-        return FALSE;
-    }
+    return image;
 }
 
-bool wxImage::LoadFile( wxInputStream& stream, long type )
+wxImage wxImage::Scale( int width, int height ) const
 {
-    UnRef();
+    wxImage image;
 
-    m_refData = new wxImageRefData;
+    wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 
-    wxImageHandler *handler = FindHandler(type);
+    // can't scale to/from 0 size
+    wxCHECK_MSG( (width > 0) && (height > 0), image,
+                 wxT("invalid new image size") );
 
-    if (handler == NULL)
-    {
-        wxLogWarning( "No image handler for type %d defined.", type );
+    long old_height = M_IMGDATA->m_height,
+         old_width  = M_IMGDATA->m_width;
+    wxCHECK_MSG( (old_height > 0) && (old_width > 0), image,
+                 wxT("invalid old image size") );
 
-        return FALSE;
+    if ( old_width % width == 0 && old_width >= width &&
+        old_height % height == 0 && old_height >= height )
+    {
+        return ShrinkBy( old_width / width , old_height / height ) ;
     }
+    image.Create( width, height, false );
 
-    return handler->LoadFile( this, stream );
-}
+    unsigned char *data = image.GetData();
 
-bool wxImage::SaveFile( const wxString& filename, int type )
-{
-    wxFileOutputStream stream(filename);
+    wxCHECK_MSG( data, image, wxT("unable to create image") );
 
-    if ( stream.LastError() == wxStream_NOERROR )
-        return SaveFile(stream, type);
+    unsigned char *source_data = M_IMGDATA->m_data;
+    unsigned char *target_data = data;
+    unsigned char *source_alpha = 0 ;
+    unsigned char *target_alpha = 0 ;
+
+    if (M_IMGDATA->m_hasMask)
+    {
+        image.SetMaskColour( M_IMGDATA->m_maskRed,
+                             M_IMGDATA->m_maskGreen,
+                             M_IMGDATA->m_maskBlue );
+    }
     else
-        return FALSE;
-}
+    {
+        source_alpha = M_IMGDATA->m_alpha ;
+        if ( source_alpha )
+        {
+            image.SetAlpha() ;
+            target_alpha = image.GetAlpha() ;
+        }
+    }
 
-bool wxImage::SaveFile( wxOutputStream& stream, int type )
-{
-    wxCHECK_MSG( Ok(), FALSE, "invalid image" );
+    long x_delta = (old_width<<16) / width;
+    long y_delta = (old_height<<16) / height;
 
-    wxImageHandler *handler = FindHandler(type);
+    unsigned char* dest_pixel = target_data;
 
-    if (handler == NULL)
-    {
-      wxLogWarning( "No image handler for type %d defined.", type );
+    long y = 0;
+    for ( long j = 0; j < height; j++ )
+        {
+        unsigned char* src_line = &source_data[(y>>16)*old_width*3];
+        unsigned char* src_alpha_line = source_alpha ? &source_alpha[(y>>16)*old_width] : 0 ;
+
+        long x = 0;
+        for ( long i = 0; i < width; i++ )
+        {
+             unsigned char* src_pixel = &src_line[(x>>16)*3];
+             unsigned char* src_alpha_pixel = source_alpha ? &src_alpha_line[(x>>16)] : 0 ;
+             dest_pixel[0] = src_pixel[0];
+             dest_pixel[1] = src_pixel[1];
+             dest_pixel[2] = src_pixel[2];
+             dest_pixel += 3;
+             if ( source_alpha )
+                *(target_alpha++) = *src_alpha_pixel ;
+             x += x_delta;
+        }
 
-      return FALSE;
+        y += y_delta;
     }
 
-    return handler->SaveFile( this, stream );
+    // In case this is a cursor, make sure the hotspot is scalled accordingly:
+    if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_X) )
+        image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_X,
+                (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_X)*width)/old_width);
+    if ( HasOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y) )
+        image.SetOption(wxIMAGE_OPTION_CUR_HOTSPOT_Y,
+                (GetOptionInt(wxIMAGE_OPTION_CUR_HOTSPOT_Y)*height)/old_height);
+
+    return image;
 }
 
-void wxImage::AddHandler( wxImageHandler *handler )
+wxImage wxImage::Rotate90( bool clockwise ) const
 {
-    // make sure that the memory will be freed at the program end
-    sm_handlers.DeleteContents(TRUE);
+    wxImage image;
 
-    sm_handlers.Append( handler );
-}
+    wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 
-void wxImage::InsertHandler( wxImageHandler *handler )
-{
-    // make sure that the memory will be freed at the program end
-    sm_handlers.DeleteContents(TRUE);
+    image.Create( M_IMGDATA->m_height, M_IMGDATA->m_width, false );
 
-    sm_handlers.Insert( handler );
-}
+    unsigned char *data = image.GetData();
 
-bool wxImage::RemoveHandler( const wxString& name )
-{
-    wxImageHandler *handler = FindHandler(name);
-    if (handler)
+    wxCHECK_MSG( data, image, wxT("unable to create image") );
+
+    unsigned char *source_data = M_IMGDATA->m_data;
+    unsigned char *target_data;
+    unsigned char *alpha_data = 0 ;
+    unsigned char *source_alpha = 0 ;
+    unsigned char *target_alpha = 0 ;
+
+    if (M_IMGDATA->m_hasMask)
     {
-        sm_handlers.DeleteObject(handler);
-        return TRUE;
+        image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
     }
     else
-        return FALSE;
-}
-
-wxImageHandler *wxImage::FindHandler( const wxString& name )
-{
-    wxNode *node = sm_handlers.First();
-    while (node)
     {
-        wxImageHandler *handler = (wxImageHandler*)node->Data();
-        if (handler->GetName().Cmp(name) == 0) return handler;
-
-        node = node->Next();
+        source_alpha = M_IMGDATA->m_alpha ;
+        if ( source_alpha )
+        {
+            image.SetAlpha() ;
+            alpha_data = image.GetAlpha() ;
+        }
     }
-    return (wxImageHandler *)NULL;
-}
 
-wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
-{
-    wxNode *node = sm_handlers.First();
-    while (node)
-    {
-        wxImageHandler *handler = (wxImageHandler*)node->Data();
-        if ( (handler->GetExtension().Cmp(extension) == 0) &&
-            (bitmapType == -1 || handler->GetType() == bitmapType) )
-        return handler;
-        node = node->Next();
-    }
-    return (wxImageHandler*)NULL;
-}
+    long height = M_IMGDATA->m_height;
+    long width  = M_IMGDATA->m_width;
 
-wxImageHandler *wxImage::FindHandler( long bitmapType )
-{
-    wxNode *node = sm_handlers.First();
-    while (node)
+    for (long j = 0; j < height; j++)
     {
-        wxImageHandler *handler = (wxImageHandler *)node->Data();
-        if (handler->GetType() == bitmapType) return handler;
-        node = node->Next();
+        for (long i = 0; i < width; i++)
+        {
+            if (clockwise)
+            {
+                target_data = data + (((i+1)*height) - j - 1)*3;
+                if(source_alpha)
+                    target_alpha = alpha_data + (((i+1)*height) - j - 1);
+            }
+            else
+            {
+                target_data = data + ((height*(width-1)) + j - (i*height))*3;
+                if(source_alpha)
+                    target_alpha = alpha_data + ((height*(width-1)) + j - (i*height));
+            }
+            memcpy( target_data, source_data, 3 );
+            source_data += 3;
+
+            if(source_alpha)
+            {
+                memcpy( target_alpha, source_alpha, 1 );
+                source_alpha += 1;
+            }
+        }
     }
-    return NULL;
-}
 
-void wxImage::InitStandardHandlers()
-{
-    AddHandler( new wxBMPHandler );
-#ifdef wxUSE_LIBPNG
-    AddHandler( new wxPNGHandler );
-#endif
+    return image;
 }
 
-void wxImage::CleanUpHandlers()
+wxImage wxImage::Mirror( bool horizontally ) const
 {
-    wxNode *node = sm_handlers.First();
-    while (node)
-    {
-        wxImageHandler *handler = (wxImageHandler *)node->Data();
-        wxNode *next = node->Next();
-        delete handler;
-        delete node;
-        node = next;
-    }
-}
+    wxImage image;
 
-//-----------------------------------------------------------------------------
-// wxImageHandler
-//-----------------------------------------------------------------------------
+    wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 
-#if !USE_SHARED_LIBRARIES
-IMPLEMENT_DYNAMIC_CLASS(wxImageHandler,wxObject)
-#endif
+    image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
 
-bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream) )
-{
-    return FALSE;
-}
+    unsigned char *data = image.GetData();
 
-bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream) )
-{
-    return FALSE;
-}
+    wxCHECK_MSG( data, image, wxT("unable to create image") );
 
-//-----------------------------------------------------------------------------
-// wxPNGHandler
-//-----------------------------------------------------------------------------
+    if (M_IMGDATA->m_hasMask)
+        image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 
-#ifdef wxUSE_LIBPNG
-
-#if !USE_SHARED_LIBRARIES
-IMPLEMENT_DYNAMIC_CLASS(wxPNGHandler,wxImageHandler)
-#endif
+    long height = M_IMGDATA->m_height;
+    long width  = M_IMGDATA->m_width;
 
+    unsigned char *source_data = M_IMGDATA->m_data;
+    unsigned char *target_data;
 
-static void _PNG_stream_reader( png_structp png_ptr, png_bytep data, png_size_t length )
-{
-   ((wxInputStream*) png_get_io_ptr( png_ptr )) -> Read(data, length);
-}
+    if (horizontally)
+    {
+        for (long j = 0; j < height; j++)
+        {
+            data += width*3;
+            target_data = data-3;
+            for (long i = 0; i < width; i++)
+            {
+                memcpy( target_data, source_data, 3 );
+                source_data += 3;
+                target_data -= 3;
+            }
+        }
+    }
+    else
+    {
+        for (long i = 0; i < height; i++)
+        {
+            target_data = data + 3*width*(height-1-i);
+            memcpy( target_data, source_data, (size_t)3*width );
+            source_data += 3*width;
+        }
+    }
 
-static void _PNG_stream_writer( png_structp png_ptr, png_bytep data, png_size_t length )
-{
-   ((wxOutputStream*) png_get_io_ptr( png_ptr )) -> Write(data, length);
+    return image;
 }
 
-bool wxPNGHandler::LoadFile( wxImage *image, wxInputStream& stream )
+wxImage wxImage::GetSubImage( const wxRect &rect ) const
 {
-    // VZ: as this function uses setjmp() the only fool proof error handling
-    //     method is to use goto (setjmp is not really C++ dtors friendly...)
-    
-    unsigned char **lines = (unsigned char **) NULL;
-    unsigned int i;
-    png_infop info_ptr = (png_infop) NULL;
-    
-    image->Destroy();
-
-    png_structp png_ptr = png_create_read_struct( PNG_LIBPNG_VER_STRING,
-                                                  (voidp) NULL,
-                                                  (png_error_ptr) NULL,
-                                                  (png_error_ptr) NULL );
-    if (!png_ptr)
-        goto error;
-
-    info_ptr = png_create_info_struct( png_ptr );
-    if (!info_ptr)
-        goto error;
-
-    if (setjmp(png_ptr->jmpbuf))
-        goto error;
+    wxImage image;
 
-    if (info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA)
-        goto error;
+    wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 
-    png_set_read_fn( png_ptr, &stream, _PNG_stream_reader);
+    wxCHECK_MSG( (rect.GetLeft()>=0) && (rect.GetTop()>=0) && (rect.GetRight()<=GetWidth()) && (rect.GetBottom()<=GetHeight()),
+                 image, wxT("invalid subimage size") );
 
-    png_uint_32 width,height;
-    int bit_depth,color_type,interlace_type;
+    int subwidth=rect.GetWidth();
+    const int subheight=rect.GetHeight();
 
-    png_read_info( png_ptr, info_ptr );
-    png_get_IHDR( png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, (int*) NULL, (int*) NULL );
+    image.Create( subwidth, subheight, false );
 
-    if (color_type == PNG_COLOR_TYPE_PALETTE)
-        png_set_expand( png_ptr );
+    unsigned char *subdata = image.GetData(), *data=GetData();
 
-    png_set_strip_16( png_ptr );
-    png_set_packing( png_ptr );
-    if (png_get_valid( png_ptr, info_ptr, PNG_INFO_tRNS))
-        png_set_expand( png_ptr );
-    png_set_filler( png_ptr, 0xff, PNG_FILLER_AFTER );
+    wxCHECK_MSG( subdata, image, wxT("unable to create image") );
 
-    image->Create( width, height );
+    if (M_IMGDATA->m_hasMask)
+        image.SetMaskColour( M_IMGDATA->m_maskRed, M_IMGDATA->m_maskGreen, M_IMGDATA->m_maskBlue );
 
-    if (!image->Ok())
-        goto error;
+    const int subleft=3*rect.GetLeft();
+    const int width=3*GetWidth();
+    subwidth*=3;
 
-    lines = (unsigned char **)malloc( height * sizeof(unsigned char *) );
-    if (lines == NULL)
-        goto error;
+    data+=rect.GetTop()*width+subleft;
 
-    for (i = 0; i < height; i++)
+    for (long j = 0; j < subheight; ++j)
     {
-        if ((lines[i] = (unsigned char *)malloc(width * (sizeof(unsigned char) * 4))) == NULL)
-        {
-            for ( unsigned int n = 0; n < i; n++ )
-                free( lines[n] );
-            goto error;
-        }
+        memcpy( subdata, data, subwidth);
+        subdata+=subwidth;
+        data+=width;
     }
 
-    // loaded successfully!
-    {
-        int transp = 0;
-        png_read_image( png_ptr, lines );
-        png_destroy_read_struct( &png_ptr, &info_ptr, (png_infopp) NULL );
-        unsigned char *ptr = image->GetData();
-        if ((color_type == PNG_COLOR_TYPE_GRAY) ||
-            (color_type == PNG_COLOR_TYPE_GRAY_ALPHA))
-        {
-            for (unsigned int y = 0; y < height; y++)
-            {
-                unsigned char *ptr2 = lines[y];
-                for (unsigned int x = 0; x < width; x++)
-                {
-                    unsigned char r = *ptr2++;
-                    unsigned char a = *ptr2++;
-                    if (a < 128)
-                    {
-                        *ptr++ = 255;
-                        *ptr++ = 0;
-                        *ptr++ = 255;
-                        transp = 1;
-                    }
-                    else
-                    {
-                        *ptr++ = r;
-                        *ptr++ = r;
-                        *ptr++ = r;
-                    }
-                }
-            }
-        }
-        else
-        {
-            for (unsigned int y = 0; y < height; y++)
-            {
-                unsigned char *ptr2 = lines[y];
-                for (unsigned int x = 0; x < width; x++)
-                {
-                    unsigned char r = *ptr2++;
-                    unsigned char g = *ptr2++;
-                    unsigned char b = *ptr2++;
-                    unsigned char a = *ptr2++;
-                    if (a < 128)
-                    {
-                        *ptr++ = 255;
-                        *ptr++ = 0;
-                        *ptr++ = 255;
-                        transp = 1;
-                    }
-                    else
-                    {
-                        if ((r == 255) && (g == 0) && (b == 255)) r = 254;
-                        *ptr++ = r;
-                        *ptr++ = g;
-                        *ptr++ = b;
-                    }
-                }
-            }
-        }
-
-        for ( unsigned int j = 0; j < height; j++ )
-            free( lines[j] );
-        free( lines );
+    return image;
+}
 
-        if (transp)
-        {
-            image->SetMaskColour( 255, 0, 255 );
-        }
-        else
-        {
-            image->SetMask( FALSE );
-        }
-    }
+wxImage wxImage::Size( const wxSize& size, const wxPoint& pos,
+                       int r_, int g_, int b_ ) const
+{
+    wxImage image;
 
-    return TRUE;
+    wxCHECK_MSG( Ok(), image, wxT("invalid image") );
+    wxCHECK_MSG( (size.GetWidth() > 0) && (size.GetHeight() > 0), image, wxT("invalid size") );
 
-error:
-    wxLogError(_("Couldn't load a PNG image - probably file is corrupted."));
+    int width = GetWidth(), height = GetHeight();
+    image.Create(size.GetWidth(), size.GetHeight(), false);
 
-    if ( image->Ok() )
+    unsigned char r = (unsigned char)r_;
+    unsigned char g = (unsigned char)g_;
+    unsigned char b = (unsigned char)b_;
+    if ((r_ == -1) && (g_ == -1) && (b_ == -1))
     {
-        image->Destroy();
+        GetOrFindMaskColour( &r, &g, &b );
+        image.SetMaskColour(r, g, b);
     }
 
-    if ( lines )
-    {
-        free( lines );
-    }
+    image.SetRGB(wxRect(), r, g, b);
+
+    wxRect subRect(pos.x, pos.y, width, height);
+    wxRect finalRect(0, 0, size.GetWidth(), size.GetHeight());
+
+    subRect.Intersect(finalRect);
 
-    if ( png_ptr )
+    if (!subRect.IsEmpty())
     {
-        if ( info_ptr )
-        {
-            png_destroy_read_struct( &png_ptr, &info_ptr, (png_infopp) NULL );
-            free(info_ptr);
-        }
+        if ((subRect.GetWidth() == width) && (subRect.GetHeight() == height))
+            image.Paste(*this, pos.x, pos.y);
         else
-            png_destroy_read_struct( &png_ptr, (png_infopp) NULL, (png_infopp) NULL );
+            image.Paste(GetSubImage(subRect), pos.x, pos.y);
     }
-    return FALSE;
-}
 
+    return image;
+}
 
-bool wxPNGHandler::SaveFile( wxImage *image, wxOutputStream& stream )
+void wxImage::Paste( const wxImage &image, int x, int y )
 {
-  {
-    png_structp png_ptr = png_create_write_struct( PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
-    if (!png_ptr)
-    {
-      return FALSE;
-    }
+    wxCHECK_RET( Ok(), wxT("invalid image") );
+    wxCHECK_RET( image.Ok(), wxT("invalid image") );
+
+    int xx = 0;
+    int yy = 0;
+    int width = image.GetWidth();
+    int height = image.GetHeight();
 
-    png_infop info_ptr = png_create_info_struct(png_ptr);
-    if (info_ptr == NULL)
+    if (x < 0)
     {
-      png_destroy_write_struct( &png_ptr, (png_infopp)NULL );
-      return FALSE;
+        xx = -x;
+        width += x;
     }
-
-    if (setjmp(png_ptr->jmpbuf))
+    if (y < 0)
     {
-      png_destroy_write_struct( &png_ptr, (png_infopp)NULL );
-      return FALSE;
+        yy = -y;
+        height += y;
     }
 
-    png_set_write_fn( png_ptr, &stream, _PNG_stream_writer, NULL);
-
-    png_set_IHDR( png_ptr, info_ptr, image->GetWidth(), image->GetHeight(), 8,
-                  PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
-                  PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
+    if ((x+xx)+width > M_IMGDATA->m_width)
+        width = M_IMGDATA->m_width - (x+xx);
+    if ((y+yy)+height > M_IMGDATA->m_height)
+        height = M_IMGDATA->m_height - (y+yy);
 
-    png_color_8 sig_bit;
-    sig_bit.red = 8;
-    sig_bit.green = 8;
-    sig_bit.blue = 8;
-    sig_bit.alpha = 8;
-    png_set_sBIT( png_ptr, info_ptr, &sig_bit );
-    png_write_info( png_ptr, info_ptr );
-    png_set_shift( png_ptr, &sig_bit );
-    png_set_packing( png_ptr );
+    if (width < 1) return;
+    if (height < 1) return;
 
-    unsigned char *data = (unsigned char *)malloc( image->GetWidth()*4 );
-    if (!data)
+    if ((!HasMask() && !image.HasMask()) ||
+        (HasMask() && !image.HasMask()) ||
+       ((HasMask() && image.HasMask() &&
+         (GetMaskRed()==image.GetMaskRed()) &&
+         (GetMaskGreen()==image.GetMaskGreen()) &&
+         (GetMaskBlue()==image.GetMaskBlue()))))
     {
-      png_destroy_write_struct( &png_ptr, (png_infopp)NULL );
-      return FALSE;
-    }
+        width *= 3;
+        unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
+        int source_step = image.GetWidth()*3;
 
-    for (int y = 0; y < image->GetHeight(); y++)
-    {
-        unsigned char *ptr = image->GetData() + (y * image->GetWidth() * 3);
-        for (int x = 0; x < image->GetWidth(); x++)
+        unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
+        int target_step = M_IMGDATA->m_width*3;
+        for (int j = 0; j < height; j++)
         {
-            data[(x << 2) + 0] = *ptr++;
-            data[(x << 2) + 1] = *ptr++;
-            data[(x << 2) + 2] = *ptr++;
-            if ((data[(x << 2) + 0] == image->GetMaskRed()) &&
-                (data[(x << 2) + 1] == image->GetMaskGreen()) &&
-                (data[(x << 2) + 2] == image->GetMaskBlue()))
-            {
-                data[(x << 2) + 3] = 0;
-            }
-            else
-            {
-                data[(x << 2) + 3] = 255;
-            }
+            memcpy( target_data, source_data, width );
+            source_data += source_step;
+            target_data += target_step;
         }
-        png_bytep row_ptr = data;
-        png_write_rows( png_ptr, &row_ptr, 1 );
+        return;
     }
 
-    free(data);
-    png_write_end( png_ptr, info_ptr );
-    png_destroy_write_struct( &png_ptr, (png_infopp)&info_ptr );
-  }
-  return TRUE;
-}
-
-#endif
-
-  // wxUSE_LIBPNG
-
-//-----------------------------------------------------------------------------
-// wxBMPHandler
-//-----------------------------------------------------------------------------
-
-#if !USE_SHARED_LIBRARIES
-IMPLEMENT_DYNAMIC_CLASS(wxBMPHandler,wxImageHandler)
-#endif
+    if (!HasMask() && image.HasMask())
+    {
+        unsigned char r = image.GetMaskRed();
+        unsigned char g = image.GetMaskGreen();
+        unsigned char b = image.GetMaskBlue();
 
-bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream )
-{
-   unsigned char      *data, *ptr;
-   int                 done, i, bpp, planes, comp, ncolors, line, column,
-                       linesize, linepos, rshift = 0, gshift = 0, bshift = 0;
-   unsigned char       aByte;
-   short int           word;
-   long int            dbuf[4], dword, rmask = 0, gmask = 0, bmask = 0, offset,
-                       size;
-   off_t               start_offset = stream.TellI();
-   signed char         bbuf[4];
-   struct _cmap
-     {
-        unsigned char       r, g, b;
-     }
-                      *cmap = NULL;
-#ifndef BI_RGB
-#define BI_RGB       0
-#define BI_RLE8      1
-#define BI_RLE4      2
-#endif
+        width *= 3;
+        unsigned char* source_data = image.GetData() + xx*3 + yy*3*image.GetWidth();
+        int source_step = image.GetWidth()*3;
 
-#ifndef BI_BITFIELDS
-#define BI_BITFIELDS 3
-#endif
+        unsigned char* target_data = GetData() + (x+xx)*3 + (y+yy)*3*M_IMGDATA->m_width;
+        int target_step = M_IMGDATA->m_width*3;
 
-  image->Destroy();
-
-   done = 0;
-   /*
-    * Reading the bmp header
-    */
-
-   stream.Read(&bbuf, 2);
-
-   stream.Read(dbuf, 4 * 4);
-
-   size = dbuf[0];
-   offset = dbuf[2];
-
-   stream.Read(dbuf, 4 * 2);
-   int width = (int)dbuf[0];
-   int height = (int)dbuf[1];
-   if (width > 32767)
-     {
-        wxLogError( "Image width > 32767 pixels for file\n" );
-        return FALSE;
-     }
-   if (height > 32767)
-     {
-        wxLogError( "Image height > 32767 pixels for file\n" );
-        return FALSE;
-     }
-   stream.Read(&word, 2);
-   planes = (int)word;
-   stream.Read(&word, 2);
-   bpp = (int)word;
-   if (bpp != 1 && bpp != 4 && bpp != 8 && bpp && 16 && bpp != 24 && bpp != 32)
-     {
-        wxLogError( "unknown bitdepth in file\n" );
-        return FALSE;
-     }
-   stream.Read(dbuf, 4 * 4);
-   comp = (int)dbuf[0];
-   if (comp != BI_RGB && comp != BI_RLE4 && comp != BI_RLE8 && comp != BI_BITFIELDS)
-     {
-        wxLogError( "unknown encoding in Windows BMP file\n" );
-        return FALSE;
-     }
-   stream.Read(dbuf, 4 * 2);
-   ncolors = (int)dbuf[0];
-   if (ncolors == 0)
-      ncolors = 1 << bpp;
-   /* some more sanity checks */
-   if (((comp == BI_RLE4) && (bpp != 4)) || ((comp == BI_RLE8) && (bpp != 8)) || ((comp == BI_BITFIELDS) && (bpp != 16 && bpp != 32)))
-     {
-        wxLogError( "encoding of BMP doesn't match bitdepth\n" );
-        return FALSE;
-     }
-   if (bpp < 16)
-     {
-        cmap = (struct _cmap *)malloc(sizeof(struct _cmap) * ncolors);
-
-        if (!cmap)
-          {
-             wxLogError( "Cannot allocate RAM for color map in BMP file\n" );
-             return FALSE;
-          }
-     }
-   else
-      cmap = NULL;
-
-   image->Create( width, height );
-   ptr = image->GetData();
-   if (!ptr)
-     {
-        wxLogError( "Cannot allocate RAM for RGB data in file\n" );
-        if (cmap)
-           free(cmap);
-        return FALSE;
-     }
-
-   /*
-    * Reading the palette, if it exists.
-    */
-   if (bpp < 16 && ncolors != 0)
-     {
-        for (i = 0; i < ncolors; i++)
-          {
-             stream.Read(bbuf, 4);
-             cmap[i].b = bbuf[0];
-             cmap[i].g = bbuf[1];
-             cmap[i].r = bbuf[2];
-          }
-     }
-   else if (bpp == 16 || bpp == 32)
-     {
-        if (comp == BI_BITFIELDS)
-          {
-             int                 bit = 0;
-
-             stream.Read(dbuf, 4 * 3);
-             bmask = dbuf[0];
-             gmask = dbuf[1];
-             rmask = dbuf[2];
-             /* find shift amount.. ugly, but i can't think of a better way */
-             for (bit = 0; bit < bpp; bit++)
-               {
-                  if (bmask & (1 << bit))
-                     bshift = bit;
-                  if (gmask & (1 << bit))
-                     gshift = bit;
-                  if (rmask & (1 << bit))
-                     rshift = bit;
-               }
-          }
-        else if (bpp == 16)
-          {
-             rmask = 0x7C00;
-             gmask = 0x03E0;
-             bmask = 0x001F;
-             rshift = 10;
-             gshift = 5;
-             bshift = 0;
-          }
-        else if (bpp == 32)
-          {
-             rmask = 0x00FF0000;
-             gmask = 0x0000FF00;
-             bmask = 0x000000FF;
-             rshift = 16;
-             gshift = 8;
-             bshift = 0;
-          }
-     }
-
-   /*
-    * Reading the image data
-    */
-   stream.SeekI(start_offset + offset);
-   data = ptr;
-
-   /* set the whole image to the background color */
-   if (bpp < 16 && (comp == BI_RLE4 || comp == BI_RLE8))
-     {
-        for (i = 0; i < width * height; i++)
-          {
-             *ptr++ = cmap[0].r;
-             *ptr++ = cmap[0].g;
-             *ptr++ = cmap[0].b;
-          }
-        ptr = data;
-     }
-   line = 0;
-   column = 0;
-#define poffset (line * width * 3 + column * 3)
-
-   /*
-    * BMPs are stored upside down... hmmmmmmmmmm....
-    */
-
-   linesize = ((width * bpp + 31) / 32) * 4;
-   for (line = (height - 1); line >= 0; line--)
-     {
-        linepos = 0;
-        for (column = 0; column < width;)
-          {
-             if (bpp < 16)
-               {
-                  int                 index;
-
-                  linepos++;
-                  aByte = stream.GetC();
-                  if (bpp == 1)
-                    {
-                       int                 bit = 0;
-
-                       for (bit = 0; bit < 8; bit++)
-                         {
-                            index = ((aByte & (0x80 >> bit)) ? 1 : 0);
-                            ptr[poffset] = cmap[index].r;
-                            ptr[poffset + 1] = cmap[index].g;
-                            ptr[poffset + 2] = cmap[index].b;
-                            column++;
-                         }
-                    }
-                  else if (bpp == 4)
-                    {
-                       if (comp == BI_RLE4)
-                         {
-                            wxLogError( "can't deal with 4bit encoded yet.\n");
-                            image->Destroy();
-                            free(cmap);
-                            return FALSE;
-                         }
-                       else
-                         {
-                            int                 nibble = 0;
-
-                            for (nibble = 0; nibble < 2; nibble++)
-                              {
-                                 index = ((aByte & (0xF0 >> nibble * 4)) >> (!nibble * 4));
-                                 if (index >= 16)
-                                    index = 15;
-                                 ptr[poffset] = cmap[index].r;
-                                 ptr[poffset + 1] = cmap[index].g;
-                                 ptr[poffset + 2] = cmap[index].b;
-                                 column++;
-                              }
-                         }
-                    }
-                  else if (bpp == 8)
-                    {
-                       if (comp == BI_RLE8)
-                         {
-                            unsigned char       first;
-
-                            first = aByte;
-                            aByte = stream.GetC();
-                            if (first == 0)
-                              {
-                                 if (aByte == 0)
-                                   {
-/*                                    column = width; */
-                                   }
-                                 else if (aByte == 1)
-                                   {
-                                      column = width;
-                                      line = -1;
-                                   }
-                                 else if (aByte == 2)
-                                   {
-                                      aByte = stream.GetC();
-                                      column += aByte;
-                                      linepos = column * bpp / 8;
-                                      aByte = stream.GetC();
-                                      line += aByte;
-                                   }
-                                 else
-                                   {
-                                      int                 absolute = aByte;
-
-                                      for (i = 0; i < absolute; i++)
-                                        {
-                                           linepos++;
-                                           aByte = stream.GetC();
-                                           ptr[poffset] = cmap[aByte].r;
-                                           ptr[poffset + 1] = cmap[aByte].g;
-                                           ptr[poffset + 2] = cmap[aByte].b;
-                                           column++;
-                                        }
-                                      if (absolute & 0x01)
-                                         aByte = stream.GetC();
-                                   }
-                              }
-                            else
-                              {
-                                 for (i = 0; i < first; i++)
-                                   {
-                                      ptr[poffset] = cmap[aByte].r;
-                                      ptr[poffset + 1] = cmap[aByte].g;
-                                      ptr[poffset + 2] = cmap[aByte].b;
-                                      column++;
-                                      linepos++;
-                                   }
-                              }
-                         }
-                       else
-                         {
-                            ptr[poffset] = cmap[aByte].r;
-                            ptr[poffset + 1] = cmap[aByte].g;
-                            ptr[poffset + 2] = cmap[aByte].b;
-                            column++;
-                            linepos += size;
-                         }
-                    }
-               }
-             else if (bpp == 24)
-               {
-              stream.Read(&bbuf, 3);
-                  linepos += 3;
-                  ptr[poffset] = (unsigned char)bbuf[2];
-                  ptr[poffset + 1] = (unsigned char)bbuf[1];
-                  ptr[poffset + 2] = (unsigned char)bbuf[0];
-                  column++;
-               }
-             else if (bpp == 16)
-               {
-                  unsigned char       temp;
-
-                  stream.Read(&word, 2);
-                  linepos += 2;
-                  temp = (word & rmask) >> rshift;
-                  ptr[poffset] = temp;
-                  temp = (word & gmask) >> gshift;
-                  ptr[poffset + 1] = temp;
-                  temp = (word & bmask) >> gshift;
-                  ptr[poffset + 2] = temp;
-                  column++;
-               }
-             else
-               {
-                  unsigned char       temp;
-
-                  stream.Read(&dword, 4);
-                  linepos += 4;
-                  temp = (dword & rmask) >> rshift;
-                  ptr[poffset] = temp;
-                  temp = (dword & gmask) >> gshift;
-                  ptr[poffset + 1] = temp;
-                  temp = (dword & bmask) >> bshift;
-                  ptr[poffset + 2] = temp;
-                  column++;
-               }
-          }
-        while ((linepos < linesize) && (comp != 1) && (comp != 2))
-          {
-             stream.Read(&aByte, 1);
-             linepos += 1;
-             if (stream.LastError() != wxStream_NOERROR)
-                break;
-          }
-     }
-   if (cmap) free(cmap);
-
-   image->SetMask( FALSE );
-
-   return TRUE;
-}
-
-#ifdef __WXMSW__
-
-wxBitmap wxImage::ConvertToBitmap() const
-{
-// sizeLimit is the MS upper limit for the DIB size
-    int sizeLimit = 1024*768*3; 
-
-// width and height of the device-dependent bitmap
-    int width = GetWidth();
-    int bmpHeight = GetHeight();
-
-// calc the number of bytes per scanline and padding
-    int bytePerLine = width*3;
-    int sizeDWORD = sizeof( DWORD );
-    div_t lineBoundary = div( bytePerLine, sizeDWORD );
-    int padding = 0;
-    if( lineBoundary.rem > 0 )  
-    {
-        padding = sizeDWORD - lineBoundary.rem;
-        bytePerLine += padding;
-    }
-// calc the number of DIBs and heights of DIBs
-    int numDIB = 1;
-    int hRemain = 0;
-    int height = sizeLimit/bytePerLine;
-    if( height >= bmpHeight )
-        height = bmpHeight; 
-    else
-    {
-        div_t result = div( bmpHeight, height );
-        numDIB = result.quot;
-	hRemain = result.rem;
-	if( hRemain >0 )  numDIB++;
-    }
-
-// set bitmap parameters
-    wxBitmap bitmap;
-    wxCHECK_MSG( Ok(), bitmap, "invalid image" );
-    bitmap.SetWidth( width );
-    bitmap.SetHeight( bmpHeight );
-    bitmap.SetDepth( wxDisplayDepth() );
-
-// create a DIB header
-    int headersize = sizeof(BITMAPINFOHEADER);
-    LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize );
-    wxCHECK_MSG( lpDIBh, bitmap, "could not allocate memory for DIB header" );
-// Fill in the DIB header
-    lpDIBh->bmiHeader.biSize = headersize;
-    lpDIBh->bmiHeader.biWidth = (DWORD)width;
-    lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
-    lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
-//   the general formula for biSizeImage:
-//      ( ( ( ((DWORD)width*24) +31 ) & ~31 ) >> 3 ) * height;
-    lpDIBh->bmiHeader.biPlanes = 1;
-    lpDIBh->bmiHeader.biBitCount = 24;
-    lpDIBh->bmiHeader.biCompression = BI_RGB;
-    lpDIBh->bmiHeader.biClrUsed = 0;
-// These seem not really needed for our purpose here.
-    lpDIBh->bmiHeader.biClrImportant = 0;
-    lpDIBh->bmiHeader.biXPelsPerMeter = 0;
-    lpDIBh->bmiHeader.biYPelsPerMeter = 0;
-// memory for DIB data
-    unsigned char *lpBits;
-    lpBits = (unsigned char *)malloc( lpDIBh->bmiHeader.biSizeImage );
-    if( !lpBits )
-    {
-        wxFAIL_MSG( "could not allocate memory for DIB" );
-        free( lpDIBh );
-        return bitmap;
-    }
-
-// create and set the device-dependent bitmap
-    HDC hdc = ::GetDC(NULL);
-    HDC memdc = ::CreateCompatibleDC( hdc );
-    HBITMAP hbitmap;
-    hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight );
-    ::SelectObject( memdc, hbitmap); 
-
-// copy image data into DIB data and then into DDB (in a loop)
-    unsigned char *data = GetData();
-    int i, j, n;
-    int origin = 0;
-    unsigned char *ptdata = data;
-    unsigned char *ptbits;
-
-    for( n=0; n<numDIB; n++ )
-    {
-	if( numDIB > 1 && n == numDIB-1 && hRemain > 0 )
-	{
-	    // redefine height and size of the (possibly) last smaller DIB
-	    // memory is not reallocated
-	    height = hRemain; 
-            lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
-            lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
-	}
-        ptbits = lpBits;
-
-        for( j=0; j<height; j++ )
-        {
-            for( i=0; i<width; i++ )
-            {
-                *(ptbits++) = *(ptdata+2);
-                *(ptbits++) = *(ptdata+1);
-                *(ptbits++) = *(ptdata  );
-                ptdata += 3;
-	    }
-	    for( i=0; i< padding; i++ )   *(ptbits++) = 0;
-        }
-        ::StretchDIBits( memdc, 0, origin, width, height,\
-	    0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
-	origin += height;
-// if numDIB = 1,  lines below can also be used
-//    hbitmap = CreateDIBitmap( hdc, &(lpDIBh->bmiHeader), CBM_INIT, lpBits, lpDIBh, DIB_RGB_COLORS );
-// The above line is equivalent to the following two lines.
-//    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
-//    ::SetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS);
-// or the following lines
-//    hbitmap = ::CreateCompatibleBitmap( hdc, width, height );
-//    HDC memdc = ::CreateCompatibleDC( hdc );
-//    ::SelectObject( memdc, hbitmap); 
-//    ::SetDIBitsToDevice( memdc, 0, 0, width, height,
-//	    0, 0, 0, height, (void *)lpBits, lpDIBh, DIB_RGB_COLORS);
-//    ::SelectObject( memdc, 0 ); 
-//    ::DeleteDC( memdc ); 
-    }
-    bitmap.SetHBITMAP( (WXHBITMAP) hbitmap );
-
-// similarly, created an mono-bitmap for the possible mask
-    if( HasMask() )
-    {
-        hbitmap = ::CreateBitmap( (WORD)width, (WORD)bmpHeight, 1, 1, NULL );
-        ::SelectObject( memdc, hbitmap); 
-        if( numDIB == 1 )   height = bmpHeight; 
-        else                height = sizeLimit/bytePerLine;
-        lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
-        lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
-        origin = 0;
-        unsigned char r = GetMaskRed();
-        unsigned char g = GetMaskGreen();
-        unsigned char b = GetMaskBlue();
-        unsigned char zero = 0, one = 255;
-        ptdata = data;
-        for( n=0; n<numDIB; n++ )
+        for (int j = 0; j < height; j++)
         {
-            if( numDIB > 1 && n == numDIB - 1 && hRemain > 0 )
+            for (int i = 0; i < width; i+=3)
             {
-	        // redefine height and size of the (possibly) last smaller DIB
-	        // memory is not reallocated
-	        height = hRemain; 
-                lpDIBh->bmiHeader.biHeight = (DWORD)(-height);
-                lpDIBh->bmiHeader.biSizeImage = bytePerLine*height;
-	    }
-            ptbits = lpBits;
-            for( int j=0; j<height; j++ )
-            {
-                for( int i=0; i<width; i++ )
+                if ((source_data[i]   != r) &&
+                    (source_data[i+1] != g) &&
+                    (source_data[i+2] != b))
                 {
-                    if( (*(ptdata++)!=r) | (*(ptdata++)!=g) | (*(ptdata++)!=b) )
-                    {
-                        *(ptbits++) = one;
-                        *(ptbits++) = one;
-                        *(ptbits++) = one;
-                    }
-                    else
-                    {
-                        *(ptbits++) = zero;
-                        *(ptbits++) = zero;
-                        *(ptbits++) = zero;
-                    }
+                    memcpy( target_data+i, source_data+i, 3 );
                 }
-	        for( i=0; i< padding; i++ )   *(ptbits++) = zero;
             }
-            ::StretchDIBits( memdc, 0, origin, width, height,\
-	        0, 0, width, height, lpBits, lpDIBh, DIB_RGB_COLORS, SRCCOPY);
-	    origin += height;
-	}
-// create a wxMask object
-        wxMask *mask = new wxMask();
-        mask->SetMaskBitmap( (WXHBITMAP) hbitmap );
-        bitmap.SetMask( mask );
-// It will be deleted when the wxBitmap object is deleted (as of 01/1999)
-/* The following can also be used but is slow to run
-        wxColour colour( GetMaskRed(), GetMaskGreen(), GetMaskBlue());
-        wxMask *mask = new wxMask( bitmap, colour );
-        bitmap.SetMask( mask );
-*/
-    }
-
-// free allocated resources  
-    ::SelectObject( memdc, 0 ); 
-    ::DeleteDC( memdc ); 
-    ::ReleaseDC(NULL, hdc);   
-    free(lpDIBh);
-    free(lpBits);
-
-// check the wxBitmap object
-    if( bitmap.GetHBITMAP() )
-        bitmap.SetOk( TRUE );
-    else
-        bitmap.SetOk( FALSE );
-   
-    return bitmap;
+            source_data += source_step;
+            target_data += target_step;
+        }
+    }
 }
 
-wxImage::wxImage( const wxBitmap &bitmap )
+void wxImage::Replace( unsigned char r1, unsigned char g1, unsigned char b1,
+                       unsigned char r2, unsigned char g2, unsigned char b2 )
 {
-// check the bitmap
-    if( !bitmap.Ok() )
-    {
-        wxFAIL_MSG( "invalid bitmap" );
-        return;
-    }
+    wxCHECK_RET( Ok(), wxT("invalid image") );
 
-// create an wxImage object
-    int width = bitmap.GetWidth();
-    int height = bitmap.GetHeight();
-    Create( width, height ); 
     unsigned char *data = GetData();
-    if( !data )
-    {
-        wxFAIL_MSG( "could not allocate data for image" );
-        return;
-    }
 
-// calc the number of bytes per scanline and padding in the DIB
-    int bytePerLine = width*3;
-    int sizeDWORD = sizeof( DWORD );
-    div_t lineBoundary = div( bytePerLine, sizeDWORD );
-    int padding = 0;
-    if( lineBoundary.rem > 0 )  
-    {
-        padding = sizeDWORD - lineBoundary.rem;
-        bytePerLine += padding;
-    }
+    const int w = GetWidth();
+    const int h = GetHeight();
 
-// create a DIB header
-    int headersize = sizeof(BITMAPINFOHEADER);
-    LPBITMAPINFO lpDIBh = (BITMAPINFO *) malloc( headersize );
-    if( !lpDIBh )
-    {
-        wxFAIL_MSG( "could not allocate data for DIB header" );
-        free( data );
-        return;
-    }
-// Fill in the DIB header
-    lpDIBh->bmiHeader.biSize = headersize;
-    lpDIBh->bmiHeader.biWidth = width;
-    lpDIBh->bmiHeader.biHeight = -height;
-    lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
-    lpDIBh->bmiHeader.biPlanes = 1;
-    lpDIBh->bmiHeader.biBitCount = 24;
-    lpDIBh->bmiHeader.biCompression = BI_RGB;
-    lpDIBh->bmiHeader.biClrUsed = 0;
-// These seem not really needed for our purpose here.
-    lpDIBh->bmiHeader.biClrImportant = 0;
-    lpDIBh->bmiHeader.biXPelsPerMeter = 0;
-    lpDIBh->bmiHeader.biYPelsPerMeter = 0;
-// memory for DIB data
-    unsigned char *lpBits;
-    lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage );
-    if( !lpBits )
-    {
-        wxFAIL_MSG( "could not allocate data for DIB" );
-        free( data );
-        free( lpDIBh );
-        return;
-    }
-    
-// copy data from the device-dependent bitmap to the DIB
-    HDC hdc = ::GetDC(NULL);
-    HBITMAP hbitmap;
-    hbitmap = (HBITMAP) bitmap.GetHBITMAP();
-    ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
-	
-// copy DIB data into the wxImage object
-    int i, j;
-    unsigned char *ptdata = data;
-    unsigned char *ptbits = lpBits;
-    for( i=0; i<height; i++ )
-    {
-        for( j=0; j<width; j++ )
+    for (int j = 0; j < h; j++)
+        for (int i = 0; i < w; i++)
         {
-            *(ptdata++) = *(ptbits+2);
-            *(ptdata++) = *(ptbits+1);
-            *(ptdata++) = *(ptbits  );
-            ptbits += 3;
-	}
-        ptbits += padding;
-    }	
-      
-// similarly, set data according to the possible mask bitmap
-    if( bitmap.GetMask() && bitmap.GetMask()->GetMaskBitmap() )
-    {
-        hbitmap = (HBITMAP) bitmap.GetMask()->GetMaskBitmap();
-	// memory DC created, color set, data copied, and memory DC deleted
-        HDC memdc = ::CreateCompatibleDC( hdc );
-        ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
-        ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
-        ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
-        ::DeleteDC( memdc ); 
-// background color set to RGB(16,16,16) in consistent with wxGTK
-        unsigned char r=16, g=16, b=16;  
-        ptdata = data;
-        ptbits = lpBits;
-        for( i=0; i<height; i++ )
-        {
-            for( j=0; j<width; j++ )
+            if ((data[0] == r1) && (data[1] == g1) && (data[2] == b1))
             {
-                if( *ptbits != 0 )
-		    ptdata += 3;
-		else
-                {
-                    *(ptdata++)  = r;
-                    *(ptdata++)  = g;
-                    *(ptdata++)  = b;
-		}
-                ptbits += 3;
+                data[0] = r2;
+                data[1] = g2;
+                data[2] = b2;
             }
-            ptbits += padding;
-        }       
-        SetMaskColour( r, g, b );
-        SetMask( TRUE );
-    }	
-    else
-    {
-        SetMask( FALSE );
-    }	
-// free allocated resources      
-    ::ReleaseDC(NULL, hdc);   
-    free(lpDIBh);
-    free(lpBits);
+            data += 3;
+        }
 }
 
-#endif
-
-#ifdef __WXGTK__
+wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const
+{
+    wxImage image;
 
-#include "gtk/gtk.h"
-#include "gdk/gdk.h"
-#include "gdk/gdkx.h"
+    wxCHECK_MSG( Ok(), image, wxT("invalid image") );
 
-wxBitmap wxImage::ConvertToBitmap() const
-{
-    wxBitmap bitmap;
+    image.Create( M_IMGDATA->m_width, M_IMGDATA->m_height, false );
 
-    wxCHECK_MSG( Ok(), bitmap, "invalid image" );
+    unsigned char *data = image.GetData();
 
-    int width = GetWidth();
-    int height = GetHeight();
+    wxCHECK_MSG( data, image, wxT("unable to create image") );
 
-    bitmap.SetHeight( height );
-    bitmap.SetWidth( width );
+    if (M_IMGDATA->m_hasMask)
+    {
+        if (M_IMGDATA->m_maskRed == r && M_IMGDATA->m_maskGreen == g &&
+                                         M_IMGDATA->m_maskBlue == b)
+            image.SetMaskColour( 255, 255, 255 );
+        else
+            image.SetMaskColour( 0, 0, 0 );
+    }
 
-    // Create picture
+    long size = M_IMGDATA->m_height * M_IMGDATA->m_width;
 
-    GdkImage *data_image =
-      gdk_image_new( GDK_IMAGE_FASTEST, gdk_visual_get_system(), width, height );
+    unsigned char *srcd = M_IMGDATA->m_data;
+    unsigned char *tard = image.GetData();
 
-    bitmap.SetPixmap( gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, -1 ) );
+    for ( long i = 0; i < size; i++, srcd += 3, tard += 3 )
+    {
+        if (srcd[0] == r && srcd[1] == g && srcd[2] == b)
+            tard[0] = tard[1] = tard[2] = 255;
+        else
+            tard[0] = tard[1] = tard[2] = 0;
+    }
 
-    // Create mask
+    return image;
+}
 
-    GdkImage *mask_image = (GdkImage*) NULL;
+int wxImage::GetWidth() const
+{
+    wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
 
-    if (HasMask())
-    {
-        unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
+    return M_IMGDATA->m_width;
+}
 
-        mask_image =  gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height );
+int wxImage::GetHeight() const
+{
+    wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
 
-        wxMask *mask = new wxMask();
-        mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 );
+    return M_IMGDATA->m_height;
+}
 
-        bitmap.SetMask( mask );
+long wxImage::XYToIndex(int x, int y) const
+{
+    if ( Ok() &&
+            x >= 0 && y >= 0 &&
+                x < M_IMGDATA->m_width && y < M_IMGDATA->m_height )
+    {
+        return y*M_IMGDATA->m_width + x;
     }
 
-    // Retrieve depth
-
-    GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() );
-    if (visual == NULL) visual = gdk_window_get_visual( (GdkWindow*) &gdk_root_parent );
-    int bpp = visual->depth;
+    return -1;
+}
 
-    bitmap.SetDepth( bpp );
+void wxImage::SetRGB( int x, int y, unsigned char r, unsigned char g, unsigned char b )
+{
+    long pos = XYToIndex(x, y);
+    wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
 
-    if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
-    if (bpp < 8) bpp = 8;
+    pos *= 3;
 
-    // Render
+    M_IMGDATA->m_data[ pos   ] = r;
+    M_IMGDATA->m_data[ pos+1 ] = g;
+    M_IMGDATA->m_data[ pos+2 ] = b;
+}
 
-    enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
-    byte_order b_o = RGB;
+void wxImage::SetRGB( const wxRect& rect_, unsigned char r, unsigned char g, unsigned char b )
+{
+    wxCHECK_RET( Ok(), wxT("invalid image") );
 
-    if (bpp >= 24)
+    wxRect rect(rect_);
+    wxRect imageRect(0, 0, GetWidth(), GetHeight());
+    if ( rect == wxRect() )
     {
-        GdkVisual *visual = gdk_visual_get_system();
-        if ((visual->red_mask > visual->green_mask) && (visual->green_mask > visual->blue_mask))      b_o = RGB;
-        else if ((visual->red_mask > visual->blue_mask) && (visual->blue_mask > visual->green_mask))  b_o = RGB;
-        else if ((visual->blue_mask > visual->red_mask) && (visual->red_mask > visual->green_mask))   b_o = BRG;
-        else if ((visual->blue_mask > visual->green_mask) && (visual->green_mask > visual->red_mask)) b_o = BGR;
-        else if ((visual->green_mask > visual->red_mask) && (visual->red_mask > visual->blue_mask))   b_o = GRB;
-        else if ((visual->green_mask > visual->blue_mask) && (visual->blue_mask > visual->red_mask))  b_o = GBR;
+        rect = imageRect;
+    }
+    else
+    {
+        wxCHECK_RET( imageRect.Inside(rect.GetTopLeft()) &&
+                     imageRect.Inside(rect.GetBottomRight()),
+                     wxT("invalid bounding rectangle") );
     }
 
-    int r_mask = GetMaskRed();
-    int g_mask = GetMaskGreen();
-    int b_mask = GetMaskBlue();
-
-    unsigned char* data = GetData();
+    int x1 = rect.GetLeft(),
+        y1 = rect.GetTop(),
+        x2 = rect.GetRight() + 1,
+        y2 = rect.GetBottom() + 1;
 
-    int index = 0;
-    for (int y = 0; y < height; y++)
+    unsigned char *data wxDUMMY_INITIALIZE(NULL);
+    int x, y, width = GetWidth();
+    for (y = y1; y < y2; y++)
     {
-        for (int x = 0; x < width; x++)
+        data = M_IMGDATA->m_data + (y*width + x1)*3;
+        for (x = x1; x < x2; x++)
         {
-            int r = data[index];
-            index++;
-            int g = data[index];
-            index++;
-            int b = data[index];
-            index++;
-
-            if (HasMask())
-            {
-                if ((r == r_mask) && (b == b_mask) && (g == g_mask))
-                    gdk_image_put_pixel( mask_image, x, y, 1 );
-                else
-                    gdk_image_put_pixel( mask_image, x, y, 0 );
-            }
-
-            if (HasMask())
-            {
-                if ((r == r_mask) && (b == b_mask) && (g == g_mask))
-                    gdk_image_put_pixel( mask_image, x, y, 1 );
-                else
-                    gdk_image_put_pixel( mask_image, x, y, 0 );
-            }
-
-            switch (bpp)
-            {
-                case 8:
-                {
-                    int pixel = -1;
-                    if (wxTheApp->m_colorCube)
-                    {
-                        pixel = wxTheApp->m_colorCube[ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];
-                    }
-                    else
-                    {
-                        GdkColormap *cmap = gtk_widget_get_default_colormap();
-                        GdkColor *colors = cmap->colors;
-                        int max = 3 * (65536);
+            *data++ = r;
+            *data++ = g;
+            *data++ = b;
+        }
+    }
+}
 
-                        for (int i = 0; i < cmap->size; i++)
-                        {
-                            int rdiff = (r << 8) - colors[i].red;
-                            int gdiff = (g << 8) - colors[i].green;
-                            int bdiff = (b << 8) - colors[i].blue;
-                            int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
-                            if (sum < max) { pixel = i; max = sum; }
-                        }
-                    }
+unsigned char wxImage::GetRed( int x, int y ) const
+{
+    long pos = XYToIndex(x, y);
+    wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
 
-                    gdk_image_put_pixel( data_image, x, y, pixel );
+    pos *= 3;
 
-                    break;
-                }
-                case 15:
-                {
-                    guint32 pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3);
-                    gdk_image_put_pixel( data_image, x, y, pixel );
-                    break;
-                }
-                case 16:
-                {
-                    guint32 pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3);
-                    gdk_image_put_pixel( data_image, x, y, pixel );
-                    break;
-                }
-                case 32:
-                case 24:
-                {
-                    guint32 pixel = 0;
-                    switch (b_o)
-                    {
-                        case RGB: pixel = (r << 16) | (g << 8) | b; break;
-                        case RBG: pixel = (r << 16) | (b << 8) | g; break;
-                        case BRG: pixel = (b << 16) | (r << 8) | g; break;
-                        case BGR: pixel = (b << 16) | (g << 8) | r; break;
-                        case GRB: pixel = (g << 16) | (r << 8) | b; break;
-                        case GBR: pixel = (g << 16) | (b << 8) | r; break;
-                    }
-                    gdk_image_put_pixel( data_image, x, y, pixel );
-                }
-                default: break;
-            }
-        } // for
-    }  // for
+    return M_IMGDATA->m_data[pos];
+}
 
-    // Blit picture
+unsigned char wxImage::GetGreen( int x, int y ) const
+{
+    long pos = XYToIndex(x, y);
+    wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
 
-    GdkGC *data_gc = gdk_gc_new( bitmap.GetPixmap() );
+    pos *= 3;
 
-    gdk_draw_image( bitmap.GetPixmap(), data_gc, data_image, 0, 0, 0, 0, width, height );
+    return M_IMGDATA->m_data[pos+1];
+}
 
-    gdk_image_destroy( data_image );
-    gdk_gc_unref( data_gc );
+unsigned char wxImage::GetBlue( int x, int y ) const
+{
+    long pos = XYToIndex(x, y);
+    wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
 
-    // Blit mask
+    pos *= 3;
 
-    if (HasMask())
-    {
-        GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() );
+    return M_IMGDATA->m_data[pos+2];
+}
 
-        gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
+bool wxImage::Ok() const
+{
+    // image of 0 width or height can't be considered ok - at least because it
+    // causes crashes in ConvertToBitmap() if we don't catch it in time
+    wxImageRefData *data = M_IMGDATA;
+    return data && data->m_ok && data->m_width && data->m_height;
+}
 
-        gdk_image_destroy( mask_image );
-        gdk_gc_unref( mask_gc );
-    }
+unsigned char *wxImage::GetData() const
+{
+    wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") );
 
-    return bitmap;
+    return M_IMGDATA->m_data;
 }
 
-wxImage::wxImage( const wxBitmap &bitmap )
+void wxImage::SetData( unsigned char *data, bool static_data  )
 {
-    wxCHECK_RET( bitmap.Ok(), "invalid bitmap" );
+    wxCHECK_RET( Ok(), wxT("invalid image") );
+
+    wxImageRefData *newRefData = new wxImageRefData();
 
-    GdkImage *gdk_image = gdk_image_get( bitmap.GetPixmap(),
-                                         0, 0,
-                                         bitmap.GetWidth(), bitmap.GetHeight() );
+    newRefData->m_width = M_IMGDATA->m_width;
+    newRefData->m_height = M_IMGDATA->m_height;
+    newRefData->m_data = data;
+    newRefData->m_ok = true;
+    newRefData->m_maskRed = M_IMGDATA->m_maskRed;
+    newRefData->m_maskGreen = M_IMGDATA->m_maskGreen;
+    newRefData->m_maskBlue = M_IMGDATA->m_maskBlue;
+    newRefData->m_hasMask = M_IMGDATA->m_hasMask;
+    newRefData->m_static = static_data;
 
-    wxCHECK_RET( gdk_image, "couldn't create image" );
+    UnRef();
+
+    m_refData = newRefData;
+}
 
-    Create( bitmap.GetWidth(), bitmap.GetHeight() );
-    char unsigned *data = GetData();
+void wxImage::SetData( unsigned char *data, int new_width, int new_height, bool static_data )
+{
+    wxImageRefData *newRefData = new wxImageRefData();
 
-    if (!data)
+    if (m_refData)
     {
-        gdk_image_destroy( gdk_image );
-        wxFAIL_MSG( "couldn't create image" );
-        return;
+        newRefData->m_width = new_width;
+        newRefData->m_height = new_height;
+        newRefData->m_data = data;
+        newRefData->m_ok = true;
+        newRefData->m_maskRed = M_IMGDATA->m_maskRed;
+        newRefData->m_maskGreen = M_IMGDATA->m_maskGreen;
+        newRefData->m_maskBlue = M_IMGDATA->m_maskBlue;
+        newRefData->m_hasMask = M_IMGDATA->m_hasMask;
     }
-
-    GdkImage *gdk_image_mask = (GdkImage*) NULL;
-    if (bitmap.GetMask())
+    else
     {
-        gdk_image_mask = gdk_image_get( bitmap.GetMask()->GetBitmap(),
-                                        0, 0,
-                                        bitmap.GetWidth(), bitmap.GetHeight() );
-
-        SetMaskColour( 16, 16, 16 );  // anything unlikely and dividable
+        newRefData->m_width = new_width;
+        newRefData->m_height = new_height;
+        newRefData->m_data = data;
+        newRefData->m_ok = true;
     }
+    newRefData->m_static = static_data;
 
-    GdkVisual *visual = gdk_window_get_visual( bitmap.GetPixmap() );
-    if (visual == NULL) visual = gdk_window_get_visual( (GdkWindow*) &gdk_root_parent );
-    int bpp = visual->depth;
-    if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
+    UnRef();
 
-    GdkColormap *cmap = gtk_widget_get_default_colormap();
+    m_refData = newRefData;
+}
 
-    long pos = 0;
-    for (int j = 0; j < bitmap.GetHeight(); j++)
-    {
-        for (int i = 0; i < bitmap.GetWidth(); i++)
-        {
-            int pixel = gdk_image_get_pixel( gdk_image, i, j );
-            if (bpp <= 8)
-            {
-                data[pos] = cmap->colors[pixel].red >> 8;
-                data[pos+1] = cmap->colors[pixel].green >> 8;
-                data[pos+2] = cmap->colors[pixel].blue >> 8;
-            } else if (bpp == 15)
-            {
-                data[pos] = (pixel >> 7) & 0xf8;
-                data[pos+1] = (pixel >> 2) & 0xf8;
-                data[pos+2] = (pixel << 3) & 0xf8;
-            } else if (bpp == 16)
-            {
-                data[pos] = (pixel >> 8) & 0xf8;
-                data[pos+1] = (pixel >> 3) & 0xfc;
-                data[pos+2] = (pixel << 3) & 0xf8;
-            } else
-            {
-                data[pos] = (pixel >> 16) & 0xff;
-                data[pos+1] = (pixel >> 8) & 0xff;
-                data[pos+2] = pixel & 0xff;
-            }
+// ----------------------------------------------------------------------------
+// alpha channel support
+// ----------------------------------------------------------------------------
 
-            if (gdk_image_mask)
-            {
-                int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
-                if (mask_pixel == 0)
-                {
-                    data[pos] = 16;
-                    data[pos+1] = 16;
-                    data[pos+2] = 16;
-               }
-            }
+void wxImage::SetAlpha(int x, int y, unsigned char alpha)
+{
+    wxCHECK_RET( HasAlpha(), wxT("no alpha channel") );
 
-            pos += 3;
-        }
-    }
+    long pos = XYToIndex(x, y);
+    wxCHECK_RET( pos != -1, wxT("invalid image coordinates") );
 
-    gdk_image_destroy( gdk_image );
-    if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
+    M_IMGDATA->m_alpha[pos] = alpha;
 }
 
-#endif
+unsigned char wxImage::GetAlpha(int x, int y) const
+{
+    wxCHECK_MSG( HasAlpha(), 0, wxT("no alpha channel") );
 
-#ifdef __WXMOTIF__
+    long pos = XYToIndex(x, y);
+    wxCHECK_MSG( pos != -1, 0, wxT("invalid image coordinates") );
 
-#include <Xm/Xm.h>
-#include "wx/utils.h"
-#include <math.h>
+    return M_IMGDATA->m_alpha[pos];
+}
 
-wxBitmap wxImage::ConvertToBitmap() const
+bool
+wxImage::ConvertColourToAlpha(unsigned char r, unsigned char g, unsigned char b)
 {
-    wxBitmap bitmap;
+    SetAlpha(NULL);
 
-    wxCHECK_MSG( Ok(), bitmap, "invalid image" );
+    const int w = M_IMGDATA->m_width;
+    const int h = M_IMGDATA->m_height;
 
-    int width = GetWidth();
-    int height = GetHeight();
+    unsigned char *alpha = GetAlpha();
+    unsigned char *data = GetData();
 
-    bitmap.SetHeight( height );
-    bitmap.SetWidth( width );
+    for ( int y = 0; y < h; y++ )
+    {
+        for ( int x = 0; x < w; x++ )
+        {
+            *alpha++ = *data;
+            *data++ = r;
+            *data++ = g;
+            *data++ = b;
+        }
+    }
 
-    Display *dpy = (Display*) wxGetDisplay();
-    Visual* vis = DefaultVisual( dpy, DefaultScreen( dpy ) );
-    int bpp = DefaultDepth( dpy, DefaultScreen( dpy ) );
+    return true;
+}
 
-    // Create image
-    
-    XImage *data_image = XCreateImage( dpy, vis, bpp, ZPixmap, 0, 0, width, height, 32, 0 );
-    data_image->data = new char[ data_image->bytes_per_line * data_image->height ];
+void wxImage::SetAlpha( unsigned char *alpha, bool static_data )
+{
+    wxCHECK_RET( Ok(), wxT("invalid image") );
 
-    bitmap.Create( width, height, bpp );
+    if ( !alpha )
+    {
+        alpha = (unsigned char *)malloc(M_IMGDATA->m_width*M_IMGDATA->m_height);
+    }
 
-/*
-    // Create mask
+    free(M_IMGDATA->m_alpha);
+    M_IMGDATA->m_alpha = alpha;
+    M_IMGDATA->m_staticAlpha = static_data;
+}
+
+unsigned char *wxImage::GetAlpha() const
+{
+    wxCHECK_MSG( Ok(), (unsigned char *)NULL, wxT("invalid image") );
+
+    return M_IMGDATA->m_alpha;
+}
+
+void wxImage::InitAlpha()
+{
+    wxCHECK_RET( !HasAlpha(), wxT("image already has an alpha channel") );
+
+    // initialize memory for alpha channel
+    SetAlpha();
+
+    unsigned char *alpha = M_IMGDATA->m_alpha;
+    const size_t lenAlpha = M_IMGDATA->m_width * M_IMGDATA->m_height;
+
+    if ( HasMask() )
+    {
+        // use the mask to initialize the alpha channel.
+        const unsigned char * const alphaEnd = alpha + lenAlpha;
+
+        const unsigned char mr = M_IMGDATA->m_maskRed;
+        const unsigned char mg = M_IMGDATA->m_maskGreen;
+        const unsigned char mb = M_IMGDATA->m_maskBlue;
+        for ( unsigned char *src = M_IMGDATA->m_data;
+              alpha < alphaEnd;
+              src += 3, alpha++ )
+        {
+            *alpha = (src[0] == mr && src[1] == mg && src[2] == mb)
+                            ? wxIMAGE_ALPHA_TRANSPARENT
+                            : wxIMAGE_ALPHA_OPAQUE;
+        }
+
+        M_IMGDATA->m_hasMask = false;
+    }
+    else // no mask
+    {
+        // make the image fully opaque
+        memset(alpha, wxIMAGE_ALPHA_OPAQUE, lenAlpha);
+    }
+}
+
+// ----------------------------------------------------------------------------
+// mask support
+// ----------------------------------------------------------------------------
+
+void wxImage::SetMaskColour( unsigned char r, unsigned char g, unsigned char b )
+{
+    wxCHECK_RET( Ok(), wxT("invalid image") );
+
+    M_IMGDATA->m_maskRed = r;
+    M_IMGDATA->m_maskGreen = g;
+    M_IMGDATA->m_maskBlue = b;
+    M_IMGDATA->m_hasMask = true;
+}
+
+bool wxImage::GetOrFindMaskColour( unsigned char *r, unsigned char *g, unsigned char *b ) const
+{
+    wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+    if (M_IMGDATA->m_hasMask)
+    {
+        if (r) *r = M_IMGDATA->m_maskRed;
+        if (g) *g = M_IMGDATA->m_maskGreen;
+        if (b) *b = M_IMGDATA->m_maskBlue;
+        return true;
+    }
+    else
+    {
+        FindFirstUnusedColour(r, g, b);
+        return false;
+    }
+}
+
+unsigned char wxImage::GetMaskRed() const
+{
+    wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+    return M_IMGDATA->m_maskRed;
+}
+
+unsigned char wxImage::GetMaskGreen() const
+{
+    wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+    return M_IMGDATA->m_maskGreen;
+}
+
+unsigned char wxImage::GetMaskBlue() const
+{
+    wxCHECK_MSG( Ok(), 0, wxT("invalid image") );
+
+    return M_IMGDATA->m_maskBlue;
+}
+
+void wxImage::SetMask( bool mask )
+{
+    wxCHECK_RET( Ok(), wxT("invalid image") );
+
+    M_IMGDATA->m_hasMask = mask;
+}
+
+bool wxImage::HasMask() const
+{
+    wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+    return M_IMGDATA->m_hasMask;
+}
+
+bool wxImage::IsTransparent(int x, int y, unsigned char threshold) const
+{
+    long pos = XYToIndex(x, y);
+    wxCHECK_MSG( pos != -1, false, wxT("invalid image coordinates") );
+
+    // check mask
+    if ( M_IMGDATA->m_hasMask )
+    {
+        const unsigned char *p = M_IMGDATA->m_data + 3*pos;
+        if ( p[0] == M_IMGDATA->m_maskRed &&
+                p[1] == M_IMGDATA->m_maskGreen &&
+                    p[2] == M_IMGDATA->m_maskBlue )
+        {
+            return true;
+        }
+    }
+
+    // then check alpha
+    if ( M_IMGDATA->m_alpha )
+    {
+        if ( M_IMGDATA->m_alpha[pos] < threshold )
+        {
+            // transparent enough
+            return true;
+        }
+    }
+
+    // not transparent
+    return false;
+}
+
+bool wxImage::SetMaskFromImage(const wxImage& mask,
+                               unsigned char mr, unsigned char mg, unsigned char mb)
+{
+    // check that the images are the same size
+    if ( (M_IMGDATA->m_height != mask.GetHeight() ) || (M_IMGDATA->m_width != mask.GetWidth () ) )
+    {
+        wxLogError( _("Image and mask have different sizes.") );
+        return false;
+    }
+
+    // find unused colour
+    unsigned char r,g,b ;
+    if (!FindFirstUnusedColour(&r, &g, &b))
+    {
+        wxLogError( _("No unused colour in image being masked.") );
+        return false ;
+    }
+
+    unsigned char *imgdata = GetData();
+    unsigned char *maskdata = mask.GetData();
+
+    const int w = GetWidth();
+    const int h = GetHeight();
+
+    for (int j = 0; j < h; j++)
+    {
+        for (int i = 0; i < w; i++)
+        {
+            if ((maskdata[0] == mr) && (maskdata[1]  == mg) && (maskdata[2] == mb))
+            {
+                imgdata[0] = r;
+                imgdata[1] = g;
+                imgdata[2] = b;
+            }
+            imgdata  += 3;
+            maskdata += 3;
+        }
+    }
+
+    SetMaskColour(r, g, b);
+    SetMask(true);
+
+    return true;
+}
+
+bool wxImage::ConvertAlphaToMask(unsigned char threshold)
+{
+    if (!HasAlpha())
+        return true;
+
+    unsigned char mr, mg, mb;
+    if (!FindFirstUnusedColour(&mr, &mg, &mb))
+    {
+        wxLogError( _("No unused colour in image being masked.") );
+        return false;
+    }
+
+    SetMask(true);
+    SetMaskColour(mr, mg, mb);
+
+    unsigned char *imgdata = GetData();
+    unsigned char *alphadata = GetAlpha();
+
+    int w = GetWidth();
+    int h = GetHeight();
+
+    for (int y = 0; y < h; y++)
+    {
+        for (int x = 0; x < w; x++, imgdata += 3, alphadata++)
+        {
+            if (*alphadata < threshold)
+            {
+                imgdata[0] = mr;
+                imgdata[1] = mg;
+                imgdata[2] = mb;
+            }
+        }
+    }
+
+    free(M_IMGDATA->m_alpha);
+    M_IMGDATA->m_alpha = NULL;
+
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+// Palette functions
+// ----------------------------------------------------------------------------
+
+#if wxUSE_PALETTE
+
+bool wxImage::HasPalette() const
+{
+    if (!Ok())
+        return false;
+
+    return M_IMGDATA->m_palette.Ok();
+}
+
+const wxPalette& wxImage::GetPalette() const
+{
+    wxCHECK_MSG( Ok(), wxNullPalette, wxT("invalid image") );
+
+    return M_IMGDATA->m_palette;
+}
+
+void wxImage::SetPalette(const wxPalette& palette)
+{
+    wxCHECK_RET( Ok(), wxT("invalid image") );
+
+    M_IMGDATA->m_palette = palette;
+}
+
+#endif // wxUSE_PALETTE
+
+// ----------------------------------------------------------------------------
+// Option functions (arbitrary name/value mapping)
+// ----------------------------------------------------------------------------
+
+void wxImage::SetOption(const wxString& name, const wxString& value)
+{
+    wxCHECK_RET( Ok(), wxT("invalid image") );
+
+    int idx = M_IMGDATA->m_optionNames.Index(name, false);
+    if (idx == wxNOT_FOUND)
+    {
+        M_IMGDATA->m_optionNames.Add(name);
+        M_IMGDATA->m_optionValues.Add(value);
+    }
+    else
+    {
+        M_IMGDATA->m_optionNames[idx] = name;
+        M_IMGDATA->m_optionValues[idx] = value;
+    }
+}
+
+void wxImage::SetOption(const wxString& name, int value)
+{
+    wxString valStr;
+    valStr.Printf(wxT("%d"), value);
+    SetOption(name, valStr);
+}
+
+wxString wxImage::GetOption(const wxString& name) const
+{
+    wxCHECK_MSG( Ok(), wxEmptyString, wxT("invalid image") );
+
+    int idx = M_IMGDATA->m_optionNames.Index(name, false);
+    if (idx == wxNOT_FOUND)
+        return wxEmptyString;
+    else
+        return M_IMGDATA->m_optionValues[idx];
+}
+
+int wxImage::GetOptionInt(const wxString& name) const
+{
+    return wxAtoi(GetOption(name));
+}
+
+bool wxImage::HasOption(const wxString& name) const
+{
+    wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+    return (M_IMGDATA->m_optionNames.Index(name, false) != wxNOT_FOUND);
+}
+
+// ----------------------------------------------------------------------------
+// image I/O
+// ----------------------------------------------------------------------------
+
+bool wxImage::LoadFile( const wxString& filename, long type, int index )
+{
+#if wxUSE_STREAMS
+    if (wxFileExists(filename))
+    {
+        wxFileInputStream stream(filename);
+        wxBufferedInputStream bstream( stream );
+        return LoadFile(bstream, type, index);
+    }
+    else
+    {
+        wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
+
+        return false;
+    }
+#else // !wxUSE_STREAMS
+    return false;
+#endif // wxUSE_STREAMS
+}
+
+bool wxImage::LoadFile( const wxString& filename, const wxString& mimetype, int index )
+{
+#if wxUSE_STREAMS
+    if (wxFileExists(filename))
+    {
+        wxFileInputStream stream(filename);
+        wxBufferedInputStream bstream( stream );
+        return LoadFile(bstream, mimetype, index);
+    }
+    else
+    {
+        wxLogError( _("Can't load image from file '%s': file does not exist."), filename.c_str() );
+
+        return false;
+    }
+#else // !wxUSE_STREAMS
+    return false;
+#endif // wxUSE_STREAMS
+}
+
+
+
+bool wxImage::SaveFile( const wxString& filename ) const
+{
+    wxString ext = filename.AfterLast('.').Lower();
+
+    wxImageHandler * pHandler = FindHandler(ext, -1);
+    if (pHandler)
+    {
+        SaveFile(filename, pHandler->GetType());
+        return true;
+    }
+
+    wxLogError(_("Can't save image to file '%s': unknown extension."), filename.c_str());
+
+    return false;
+}
+
+bool wxImage::SaveFile( const wxString& filename, int type ) const
+{
+#if wxUSE_STREAMS
+    wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+    ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
+
+    wxFileOutputStream stream(filename);
+
+    if ( stream.IsOk() )
+    {
+        wxBufferedOutputStream bstream( stream );
+        return SaveFile(bstream, type);
+    }
+#endif // wxUSE_STREAMS
+
+    return false;
+}
+
+bool wxImage::SaveFile( const wxString& filename, const wxString& mimetype ) const
+{
+#if wxUSE_STREAMS
+    wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+    ((wxImage*)this)->SetOption(wxIMAGE_OPTION_FILENAME, filename);
+
+    wxFileOutputStream stream(filename);
+
+    if ( stream.IsOk() )
+    {
+        wxBufferedOutputStream bstream( stream );
+        return SaveFile(bstream, mimetype);
+    }
+#endif // wxUSE_STREAMS
+
+    return false;
+}
+
+bool wxImage::CanRead( const wxString &name )
+{
+#if wxUSE_STREAMS
+  wxFileInputStream stream(name);
+  return CanRead(stream);
+#else
+  return false;
+#endif
+}
+
+int wxImage::GetImageCount( const wxString &name, long type )
+{
+#if wxUSE_STREAMS
+  wxFileInputStream stream(name);
+  if (stream.Ok())
+      return GetImageCount(stream, type);
+#endif
+
+  return 0;
+}
+
+#if wxUSE_STREAMS
+
+bool wxImage::CanRead( wxInputStream &stream )
+{
+    const wxList& list = GetHandlers();
+
+    for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() )
+    {
+        wxImageHandler *handler=(wxImageHandler*)node->GetData();
+        if (handler->CanRead( stream ))
+            return true;
+    }
+
+    return false;
+}
+
+int wxImage::GetImageCount( wxInputStream &stream, long type )
+{
+    wxImageHandler *handler;
+
+    if ( type == wxBITMAP_TYPE_ANY )
+    {
+        wxList &list=GetHandlers();
+
+        for (wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext())
+        {
+             handler=(wxImageHandler*)node->GetData();
+             if ( handler->CanRead(stream) )
+                 return handler->GetImageCount(stream);
+
+        }
+
+        wxLogWarning(_("No handler found for image type."));
+        return 0;
+    }
+
+    handler = FindHandler(type);
+
+    if ( !handler )
+    {
+        wxLogWarning(_("No image handler for type %d defined."), type);
+        return false;
+    }
+
+    if ( handler->CanRead(stream) )
+    {
+        return handler->GetImageCount(stream);
+    }
+    else
+    {
+        wxLogError(_("Image file is not of type %d."), type);
+        return 0;
+    }
+}
+
+bool wxImage::LoadFile( wxInputStream& stream, long type, int index )
+{
+    UnRef();
+
+    m_refData = new wxImageRefData;
+
+    wxImageHandler *handler;
+
+    if ( type == wxBITMAP_TYPE_ANY )
+    {
+        wxList &list=GetHandlers();
+
+        for ( wxList::compatibility_iterator node = list.GetFirst(); node; node = node->GetNext() )
+        {
+             handler=(wxImageHandler*)node->GetData();
+             if ( handler->CanRead(stream) )
+                 return handler->LoadFile(this, stream, true/*verbose*/, index);
+
+        }
+
+        wxLogWarning( _("No handler found for image type.") );
+        return false;
+    }
+
+    handler = FindHandler(type);
+
+    if (handler == 0)
+    {
+        wxLogWarning( _("No image handler for type %d defined."), type );
+
+        return false;
+    }
+
+    return handler->LoadFile(this, stream, true/*verbose*/, index);
+}
+
+bool wxImage::LoadFile( wxInputStream& stream, const wxString& mimetype, int index )
+{
+    UnRef();
+
+    m_refData = new wxImageRefData;
+
+    wxImageHandler *handler = FindHandlerMime(mimetype);
+
+    if (handler == 0)
+    {
+        wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
+
+        return false;
+    }
+
+    return handler->LoadFile( this, stream, true/*verbose*/, index );
+}
+
+bool wxImage::SaveFile( wxOutputStream& stream, int type ) const
+{
+    wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+    wxImageHandler *handler = FindHandler(type);
+    if ( !handler )
+    {
+        wxLogWarning( _("No image handler for type %d defined."), type );
+
+        return false;
+    }
+
+    return handler->SaveFile( (wxImage*)this, stream );
+}
+
+bool wxImage::SaveFile( wxOutputStream& stream, const wxString& mimetype ) const
+{
+    wxCHECK_MSG( Ok(), false, wxT("invalid image") );
+
+    wxImageHandler *handler = FindHandlerMime(mimetype);
+    if ( !handler )
+    {
+        wxLogWarning( _("No image handler for type %s defined."), mimetype.GetData() );
+
+        return false;
+    }
+
+    return handler->SaveFile( (wxImage*)this, stream );
+}
+#endif // wxUSE_STREAMS
 
-    GdkImage *mask_image = (GdkImage*) NULL;
+// ----------------------------------------------------------------------------
+// image I/O handlers
+// ----------------------------------------------------------------------------
 
-    if (HasMask())
+void wxImage::AddHandler( wxImageHandler *handler )
+{
+    // Check for an existing handler of the type being added.
+    if (FindHandler( handler->GetType() ) == 0)
+    {
+        sm_handlers.Append( handler );
+    }
+    else
+    {
+        // This is not documented behaviour, merely the simplest 'fix'
+        // for preventing duplicate additions.  If someone ever has
+        // a good reason to add and remove duplicate handlers (and they
+        // may) we should probably refcount the duplicates.
+        //   also an issue in InsertHandler below.
+
+        wxLogDebug( _T("Adding duplicate image handler for '%s'"),
+                    handler->GetName().c_str() );
+        delete handler;
+    }
+}
+
+void wxImage::InsertHandler( wxImageHandler *handler )
+{
+    // Check for an existing handler of the type being added.
+    if (FindHandler( handler->GetType() ) == 0)
+    {
+        sm_handlers.Insert( handler );
+    }
+    else
     {
-        unsigned char *mask_data = (unsigned char*)malloc( ((width >> 3)+8) * height );
+        // see AddHandler for additional comments.
+        wxLogDebug( _T("Inserting duplicate image handler for '%s'"),
+                    handler->GetName().c_str() );
+        delete handler;
+    }
+}
 
-        mask_image =  gdk_image_new_bitmap( gdk_visual_get_system(), mask_data, width, height );
+bool wxImage::RemoveHandler( const wxString& name )
+{
+    wxImageHandler *handler = FindHandler(name);
+    if (handler)
+    {
+        sm_handlers.DeleteObject(handler);
+        delete handler;
+        return true;
+    }
+    else
+        return false;
+}
 
-	wxMask *mask = new wxMask();
-	mask->m_bitmap = gdk_pixmap_new( (GdkWindow*)&gdk_root_parent, width, height, 1 );
+wxImageHandler *wxImage::FindHandler( const wxString& name )
+{
+    wxList::compatibility_iterator node = sm_handlers.GetFirst();
+    while (node)
+    {
+        wxImageHandler *handler = (wxImageHandler*)node->GetData();
+        if (handler->GetName().Cmp(name) == 0) return handler;
 
-	bitmap.SetMask( mask );
+        node = node->GetNext();
     }
-*/
+    return 0;
+}
 
-    // Retrieve depth info
-    
-    XVisualInfo vinfo_template;
-    XVisualInfo *vi;
-    
-    vinfo_template.visual = vis;
-    vinfo_template.visualid = XVisualIDFromVisual( vis );
-    vinfo_template.depth = bpp;
-    int nitem = 0;
-    
-    vi = XGetVisualInfo( dpy, VisualIDMask|VisualDepthMask, &vinfo_template, &nitem );
-    
-    if (!vi) 
+wxImageHandler *wxImage::FindHandler( const wxString& extension, long bitmapType )
+{
+    wxList::compatibility_iterator node = sm_handlers.GetFirst();
+    while (node)
     {
-        printf("no visual.\n" );
-        return wxNullBitmap;
+        wxImageHandler *handler = (wxImageHandler*)node->GetData();
+        if ( (handler->GetExtension().Cmp(extension) == 0) &&
+            (bitmapType == -1 || handler->GetType() == bitmapType) )
+            return handler;
+        node = node->GetNext();
     }
-	
-    XFree( vi );
+    return 0;
+}
 
-    if ((bpp == 16) && (vi->red_mask != 0xf800)) bpp = 15;
-    if (bpp < 8) bpp = 8;
+wxImageHandler *wxImage::FindHandler( long bitmapType )
+{
+    wxList::compatibility_iterator node = sm_handlers.GetFirst();
+    while (node)
+    {
+        wxImageHandler *handler = (wxImageHandler *)node->GetData();
+        if (handler->GetType() == bitmapType) return handler;
+        node = node->GetNext();
+    }
+    return 0;
+}
 
-    // Render
+wxImageHandler *wxImage::FindHandlerMime( const wxString& mimetype )
+{
+    wxList::compatibility_iterator node = sm_handlers.GetFirst();
+    while (node)
+    {
+        wxImageHandler *handler = (wxImageHandler *)node->GetData();
+        if (handler->GetMimeType().IsSameAs(mimetype, false)) return handler;
+        node = node->GetNext();
+    }
+    return 0;
+}
 
-    enum byte_order { RGB, RBG, BRG, BGR, GRB, GBR };
-    byte_order b_o = RGB;
+void wxImage::InitStandardHandlers()
+{
+#if wxUSE_STREAMS
+    AddHandler(new wxBMPHandler);
+#endif // wxUSE_STREAMS
+}
 
-    if (bpp >= 24)
+void wxImage::CleanUpHandlers()
+{
+    wxList::compatibility_iterator node = sm_handlers.GetFirst();
+    while (node)
     {
-        if ((vi->red_mask > vi->green_mask) && (vi->green_mask > vi->blue_mask))      b_o = RGB;
-        else if ((vi->red_mask > vi->blue_mask) && (vi->blue_mask > vi->green_mask))  b_o = RGB;
-        else if ((vi->blue_mask > vi->red_mask) && (vi->red_mask > vi->green_mask))   b_o = BRG;
-        else if ((vi->blue_mask > vi->green_mask) && (vi->green_mask > vi->red_mask)) b_o = BGR;
-        else if ((vi->green_mask > vi->red_mask) && (vi->red_mask > vi->blue_mask))   b_o = GRB;
-        else if ((vi->green_mask > vi->blue_mask) && (vi->blue_mask > vi->red_mask))  b_o = GBR;
+        wxImageHandler *handler = (wxImageHandler *)node->GetData();
+        wxList::compatibility_iterator next = node->GetNext();
+        delete handler;
+        node = next;
     }
 
-/*
-    int r_mask = GetMaskRed();
-    int g_mask = GetMaskGreen();
-    int b_mask = GetMaskBlue();
-*/
+    sm_handlers.Clear();
+}
+
+wxString wxImage::GetImageExtWildcard()
+{
+    wxString fmts;
 
-    XColor colors[256];
-    if (bpp == 8)
+    wxList& Handlers = wxImage::GetHandlers();
+    wxList::compatibility_iterator Node = Handlers.GetFirst();
+    while ( Node )
     {
-	Colormap cmap = (Colormap) wxTheApp->GetMainColormap( dpy );
-	
-        for (int i = 0; i < 256; i++) colors[i].pixel = i;
-	XQueryColors( dpy, cmap, colors, 256 );
+        wxImageHandler* Handler = (wxImageHandler*)Node->GetData();
+        fmts += wxT("*.") + Handler->GetExtension();
+        Node = Node->GetNext();
+        if ( Node ) fmts += wxT(";");
     }
 
-    unsigned char* data = GetData();
+    return wxT("(") + fmts + wxT(")|") + fmts;
+}
+
+//-----------------------------------------------------------------------------
+// wxImageHandler
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_ABSTRACT_CLASS(wxImageHandler,wxObject)
+
+#if wxUSE_STREAMS
+bool wxImageHandler::LoadFile( wxImage *WXUNUSED(image), wxInputStream& WXUNUSED(stream), bool WXUNUSED(verbose), int WXUNUSED(index) )
+{
+    return false;
+}
+
+bool wxImageHandler::SaveFile( wxImage *WXUNUSED(image), wxOutputStream& WXUNUSED(stream), bool WXUNUSED(verbose) )
+{
+    return false;
+}
+
+int wxImageHandler::GetImageCount( wxInputStream& WXUNUSED(stream) )
+{
+    return 1;
+}
 
-    int index = 0;
-    for (int y = 0; y < height; y++)
+bool wxImageHandler::CanRead( const wxString& name )
+{
+    if (wxFileExists(name))
     {
-        for (int x = 0; x < width; x++)
-        {
-            int r = data[index];
-	    index++;
-            int g = data[index];
-	    index++;
-            int b = data[index];
-	    index++;
+        wxFileInputStream stream(name);
+        return CanRead(stream);
+    }
 
-/*
-	    if (HasMask())
-	    {
-	        if ((r == r_mask) && (b == b_mask) && (g == g_mask))
-	            gdk_image_put_pixel( mask_image, x, y, 1 );
-	        else
-	            gdk_image_put_pixel( mask_image, x, y, 0 );
-	    }
-*/
-
-	    switch (bpp)
-	    {
-	        case 8:
-	        {
-                    int pixel = -1;
-/*
-		    if (wxTheApp->m_colorCube)
-		    {
-		        pixel = wxTheApp->m_colorCube
-                           [ ((r & 0xf8) << 7) + ((g & 0xf8) << 2) + ((b & 0xf8) >> 3) ];  		      
-                    } 		    
-                    else
-		    {
-*/
-                        int max = 3 * (65536);
-                        for (int i = 0; i < 256; i++)
-                        {
-                            int rdiff = (r << 8) - colors[i].red;
-                            int gdiff = (g << 8) - colors[i].green;
-                            int bdiff = (b << 8) - colors[i].blue;
-                            int sum = abs (rdiff) + abs (gdiff) + abs (bdiff);
-                            if (sum < max) { pixel = i; max = sum; }
-			}
-/*
-		    }
-*/
-		    XPutPixel( data_image, x, y, pixel );
-	            break;
-	        }
-	        case 15:
-	        {
-	            int pixel = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3);
-		    XPutPixel( data_image, x, y, pixel );
-	            break;
-	        }
-	        case 16:
-	        {
-	            int pixel = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3);
-		    XPutPixel( data_image, x, y, pixel );
-	            break;
-	        }
-	        case 32:
-	        case 24:
-	        {
-	            int pixel = 0;
-	            switch (b_o)
-	            {
-	                case RGB: pixel = (r << 16) | (g << 8) | b; break;
-	                case RBG: pixel = (r << 16) | (b << 8) | g; break;
-	                case BRG: pixel = (b << 16) | (r << 8) | g; break;
-	                case BGR: pixel = (b << 16) | (g << 8) | r; break;
-	                case GRB: pixel = (g << 16) | (r << 8) | b; break;
-	                case GBR: pixel = (g << 16) | (b << 8) | r; break;
-	            }
-		    XPutPixel( data_image, x, y, pixel );
-	        }
-	        default: break;
-	    }
-        } // for
-    }  // for
-
-    // Blit picture
-
-    XGCValues gcvalues;
-    gcvalues.foreground = BlackPixel( dpy, DefaultScreen( dpy ) );
-    GC gc = XCreateGC( dpy, RootWindow ( dpy, DefaultScreen(dpy) ), GCForeground, &gcvalues );
-    XPutImage( dpy, (Drawable)bitmap.GetPixmap(), gc, data_image, 0, 0, 0, 0, width, height );
-
-    XDestroyImage( data_image );
-    XFreeGC( dpy, gc );
+    wxLogError( _("Can't check image format of file '%s': file does not exist."), name.c_str() );
 
-/*
-    // Blit mask
+    return false;
+}
 
-    if (HasMask())
+bool wxImageHandler::CallDoCanRead(wxInputStream& stream)
+{
+    wxFileOffset posOld = stream.TellI();
+    if ( posOld == wxInvalidOffset )
+    {
+        // can't test unseekable stream
+        return false;
+    }
+
+    bool ok = DoCanRead(stream);
+
+    // restore the old position to be able to test other formats and so on
+    if ( stream.SeekI(posOld) == wxInvalidOffset )
     {
-        GdkGC *mask_gc = gdk_gc_new( bitmap.GetMask()->GetBitmap() );
+        wxLogDebug(_T("Failed to rewind the stream in wxImageHandler!"));
 
-        gdk_draw_image( bitmap.GetMask()->GetBitmap(), mask_gc, mask_image, 0, 0, 0, 0, width, height );
+        // reading would fail anyhow as we're not at the right position
+        return false;
+    }
+
+    return ok;
+}
+
+#endif // wxUSE_STREAMS
+
+// ----------------------------------------------------------------------------
+// image histogram stuff
+// ----------------------------------------------------------------------------
+
+bool
+wxImageHistogram::FindFirstUnusedColour(unsigned char *r,
+                                        unsigned char *g,
+                                        unsigned char *b,
+                                        unsigned char r2,
+                                        unsigned char b2,
+                                        unsigned char g2) const
+{
+    unsigned long key = MakeKey(r2, g2, b2);
+
+    while ( find(key) != end() )
+    {
+        // color already used
+        r2++;
+        if ( r2 >= 255 )
+        {
+            r2 = 0;
+            g2++;
+            if ( g2 >= 255 )
+            {
+                g2 = 0;
+                b2++;
+                if ( b2 >= 255 )
+                {
+                    wxLogError(_("No unused colour in image.") );
+                    return false;
+                }
+            }
+        }
 
-        gdk_image_destroy( mask_image );
-        gdk_gc_unref( mask_gc );
+        key = MakeKey(r2, g2, b2);
     }
-*/
 
-    return bitmap;
+    if ( r )
+        *r = r2;
+    if ( g )
+        *g = g2;
+    if ( b )
+        *b = b2;
+
+    return true;
 }
 
-wxImage::wxImage( const wxBitmap &bitmap )
+bool
+wxImage::FindFirstUnusedColour(unsigned char *r,
+                               unsigned char *g,
+                               unsigned char *b,
+                               unsigned char r2,
+                               unsigned char b2,
+                               unsigned char g2) const
 {
-    wxCHECK_RET( bitmap.Ok(), "invalid bitmap" );
+    wxImageHistogram histogram;
 
-    Display *dpy = (Display*) wxGetDisplay();
-    Visual* vis = DefaultVisual( dpy, DefaultScreen( dpy ) );
-    int bpp = DefaultDepth( dpy, DefaultScreen( dpy ) );
-    
-    XImage *ximage = XGetImage( dpy,
-                                (Drawable)bitmap.GetPixmap(),
-                                0, 0,
-                                bitmap.GetWidth(), bitmap.GetHeight(),
-				AllPlanes, ZPixmap );
+    ComputeHistogram(histogram);
 
-    wxCHECK_RET( ximage, "couldn't create image" );
+    return histogram.FindFirstUnusedColour(r, g, b, r2, g2, b2);
+}
+
+
+
+// GRG, Dic/99
+// Counts and returns the number of different colours. Optionally stops
+// when it exceeds 'stopafter' different colours. This is useful, for
+// example, to see if the image can be saved as 8-bit (256 colour or
+// less, in this case it would be invoked as CountColours(256)). Default
+// value for stopafter is -1 (don't care).
+//
+unsigned long wxImage::CountColours( unsigned long stopafter ) const
+{
+    wxHashTable h;
+    wxObject dummy;
+    unsigned char r, g, b;
+    unsigned char *p;
+    unsigned long size, nentries, key;
 
-    Create( bitmap.GetWidth(), bitmap.GetHeight() );
-    char unsigned *data = GetData();
+    p = GetData();
+    size = GetWidth() * GetHeight();
+    nentries = 0;
 
-    if (!data)
+    for (unsigned long j = 0; (j < size) && (nentries <= stopafter) ; j++)
     {
-        XDestroyImage( ximage );
-        wxFAIL_MSG( "couldn't create image" );
-        return;
+        r = *(p++);
+        g = *(p++);
+        b = *(p++);
+        key = wxImageHistogram::MakeKey(r, g, b);
+
+        if (h.Get(key) == NULL)
+        {
+            h.Put(key, &dummy);
+            nentries++;
+        }
+    }
+
+    return nentries;
+}
+
+
+unsigned long wxImage::ComputeHistogram( wxImageHistogram &h ) const
+{
+    unsigned char *p = GetData();
+    unsigned long nentries = 0;
+
+    h.clear();
+
+    const unsigned long size = GetWidth() * GetHeight();
+
+    unsigned char r, g, b;
+    for ( unsigned long n = 0; n < size; n++ )
+    {
+        r = *p++;
+        g = *p++;
+        b = *p++;
+
+        wxImageHistogramEntry& entry = h[wxImageHistogram::MakeKey(r, g, b)];
+
+        if ( entry.value++ == 0 )
+            entry.index = nentries++;
     }
 
+    return nentries;
+}
+
 /*
-    GdkImage *gdk_image_mask = (GdkImage*) NULL;
-    if (bitmap.GetMask())
-    {
-        gdk_image_mask = gdk_image_get( bitmap.GetMask()->GetBitmap(),
-                                        0, 0,
-                                        bitmap.GetWidth(), bitmap.GetHeight() );
-
-        SetMaskColour( 16, 16, 16 );  // anything unlikely and dividable
-    }
-*/
-
-    // Retrieve depth info
-    
-    XVisualInfo vinfo_template;
-    XVisualInfo *vi;
-    
-    vinfo_template.visual = vis;
-    vinfo_template.visualid = XVisualIDFromVisual( vis );
-    vinfo_template.depth = bpp;
-    int nitem = 0;
-    
-    vi = XGetVisualInfo( dpy, VisualIDMask|VisualDepthMask, &vinfo_template, &nitem );
-    
-    if (!vi) 
-    {
-        printf("no visual.\n" );
-        return;
+ * Rotation code by Carlos Moreno
+ */
+
+// GRG: I've removed wxRotationPoint - we already have wxRealPoint which
+//      does exactly the same thing. And I also got rid of wxRotationPixel
+//      bacause of potential problems in architectures where alignment
+//      is an issue, so I had to rewrite parts of the code.
+
+static const double gs_Epsilon = 1e-10;
+
+static inline int wxCint (double x)
+{
+    return (x > 0) ? (int) (x + 0.5) : (int) (x - 0.5);
+}
+
+
+// Auxiliary function to rotate a point (x,y) with respect to point p0
+// make it inline and use a straight return to facilitate optimization
+// also, the function receives the sine and cosine of the angle to avoid
+// repeating the time-consuming calls to these functions -- sin/cos can
+// be computed and stored in the calling function.
+
+inline wxRealPoint rotated_point (const wxRealPoint & p, double cos_angle, double sin_angle, const wxRealPoint & p0)
+{
+    return wxRealPoint (p0.x + (p.x - p0.x) * cos_angle - (p.y - p0.y) * sin_angle,
+                        p0.y + (p.y - p0.y) * cos_angle + (p.x - p0.x) * sin_angle);
+}
+
+inline wxRealPoint rotated_point (double x, double y, double cos_angle, double sin_angle, const wxRealPoint & p0)
+{
+    return rotated_point (wxRealPoint(x,y), cos_angle, sin_angle, p0);
+}
+
+wxImage wxImage::Rotate(double angle, const wxPoint & centre_of_rotation, bool interpolating, wxPoint * offset_after_rotation) const
+{
+    int i;
+    angle = -angle;     // screen coordinates are a mirror image of "real" coordinates
+
+    bool has_alpha = HasAlpha();
+
+    // Create pointer-based array to accelerate access to wxImage's data
+    unsigned char ** data = new unsigned char * [GetHeight()];
+    data[0] = GetData();
+    for (i = 1; i < GetHeight(); i++)
+        data[i] = data[i - 1] + (3 * GetWidth());
+
+    // Same for alpha channel
+    unsigned char ** alpha = NULL;
+    if (has_alpha)
+    {
+        alpha = new unsigned char * [GetHeight()];
+        alpha[0] = GetAlpha();
+        for (i = 1; i < GetHeight(); i++)
+            alpha[i] = alpha[i - 1] + GetWidth();
+    }
+
+    // precompute coefficients for rotation formula
+    // (sine and cosine of the angle)
+    const double cos_angle = cos(angle);
+    const double sin_angle = sin(angle);
+
+    // Create new Image to store the result
+    // First, find rectangle that covers the rotated image;  to do that,
+    // rotate the four corners
+
+    const wxRealPoint p0(centre_of_rotation.x, centre_of_rotation.y);
+
+    wxRealPoint p1 = rotated_point (0, 0, cos_angle, sin_angle, p0);
+    wxRealPoint p2 = rotated_point (0, GetHeight(), cos_angle, sin_angle, p0);
+    wxRealPoint p3 = rotated_point (GetWidth(), 0, cos_angle, sin_angle, p0);
+    wxRealPoint p4 = rotated_point (GetWidth(), GetHeight(), cos_angle, sin_angle, p0);
+
+    int x1 = (int) floor (wxMin (wxMin(p1.x, p2.x), wxMin(p3.x, p4.x)));
+    int y1 = (int) floor (wxMin (wxMin(p1.y, p2.y), wxMin(p3.y, p4.y)));
+    int x2 = (int) ceil (wxMax (wxMax(p1.x, p2.x), wxMax(p3.x, p4.x)));
+    int y2 = (int) ceil (wxMax (wxMax(p1.y, p2.y), wxMax(p3.y, p4.y)));
+
+    // Create rotated image
+    wxImage rotated (x2 - x1 + 1, y2 - y1 + 1, false);
+    // With alpha channel
+    if (has_alpha)
+        rotated.SetAlpha();
+
+    if (offset_after_rotation != NULL)
+    {
+        *offset_after_rotation = wxPoint (x1, y1);
     }
-	
-    if ((bpp == 16) && (vi->red_mask != 0xf800)) bpp = 15;
-    
-    XFree( vi );
 
-    XColor colors[256];
-    if (bpp == 8)
+    // GRG: The rotated (destination) image is always accessed
+    //      sequentially, so there is no need for a pointer-based
+    //      array here (and in fact it would be slower).
+    //
+    unsigned char * dst = rotated.GetData();
+
+    unsigned char * alpha_dst = NULL;
+    if (has_alpha)
+        alpha_dst = rotated.GetAlpha();
+
+    // GRG: if the original image has a mask, use its RGB values
+    //      as the blank pixel, else, fall back to default (black).
+    //
+    unsigned char blank_r = 0;
+    unsigned char blank_g = 0;
+    unsigned char blank_b = 0;
+
+    if (HasMask())
     {
-	Colormap cmap = (Colormap)wxTheApp->GetMainColormap( dpy );
-	
-        for (int i = 0; i < 256; i++) colors[i].pixel = i;
-	XQueryColors( dpy, cmap, colors, 256 );
+        blank_r = GetMaskRed();
+        blank_g = GetMaskGreen();
+        blank_b = GetMaskBlue();
+        rotated.SetMaskColour( blank_r, blank_g, blank_b );
     }
 
-    long pos = 0;
-    for (int j = 0; j < bitmap.GetHeight(); j++)
+    // Now, for each point of the rotated image, find where it came from, by
+    // performing an inverse rotation (a rotation of -angle) and getting the
+    // pixel at those coordinates
+
+    // GRG: I've taken the (interpolating) test out of the loops, so that
+    //      it is done only once, instead of repeating it for each pixel.
+
+    int x;
+    if (interpolating)
     {
-        for (int i = 0; i < bitmap.GetWidth(); i++)
+        for (int y = 0; y < rotated.GetHeight(); y++)
         {
-	    int pixel = XGetPixel( ximage, i, j );
-            if (bpp <= 8)
-            {
-                data[pos] = colors[pixel].red >> 8;
-                data[pos+1] = colors[pixel].green >> 8;
-                data[pos+2] = colors[pixel].blue >> 8;
-            } else if (bpp == 15)
-            {
-                data[pos] = (pixel >> 7) & 0xf8;
-                data[pos+1] = (pixel >> 2) & 0xf8;
-                data[pos+2] = (pixel << 3) & 0xf8;
-            } else if (bpp == 16)
+            for (x = 0; x < rotated.GetWidth(); x++)
             {
-                data[pos] = (pixel >> 8) & 0xf8;
-                data[pos+1] = (pixel >> 3) & 0xfc;
-                data[pos+2] = (pixel << 3) & 0xf8;
-            } else
-            {
-                data[pos] = (pixel >> 16) & 0xff;
-                data[pos+1] = (pixel >> 8) & 0xff;
-                data[pos+2] = pixel & 0xff;
-            }
+                wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
 
-/*
-            if (gdk_image_mask)
-            {
-                int mask_pixel = gdk_image_get_pixel( gdk_image_mask, i, j );
-                if (mask_pixel == 0)
+                if (-0.25 < src.x && src.x < GetWidth() - 0.75 &&
+                    -0.25 < src.y && src.y < GetHeight() - 0.75)
+                {
+                    // interpolate using the 4 enclosing grid-points.  Those
+                    // points can be obtained using floor and ceiling of the
+                    // exact coordinates of the point
+                        // C.M. 2000-02-17:  when the point is near the border, special care is required.
+
+                    int x1, y1, x2, y2;
+
+                    if (0 < src.x && src.x < GetWidth() - 1)
+                    {
+                        x1 = wxCint(floor(src.x));
+                        x2 = wxCint(ceil(src.x));
+                    }
+                    else    // else means that x is near one of the borders (0 or width-1)
+                    {
+                        x1 = x2 = wxCint (src.x);
+                    }
+
+                    if (0 < src.y && src.y < GetHeight() - 1)
+                    {
+                        y1 = wxCint(floor(src.y));
+                        y2 = wxCint(ceil(src.y));
+                    }
+                    else
+                    {
+                        y1 = y2 = wxCint (src.y);
+                    }
+
+                    // get four points and the distances (square of the distance,
+                    // for efficiency reasons) for the interpolation formula
+
+                    // GRG: Do not calculate the points until they are
+                    //      really needed -- this way we can calculate
+                    //      just one, instead of four, if d1, d2, d3
+                    //      or d4 are < gs_Epsilon
+
+                    const double d1 = (src.x - x1) * (src.x - x1) + (src.y - y1) * (src.y - y1);
+                    const double d2 = (src.x - x2) * (src.x - x2) + (src.y - y1) * (src.y - y1);
+                    const double d3 = (src.x - x2) * (src.x - x2) + (src.y - y2) * (src.y - y2);
+                    const double d4 = (src.x - x1) * (src.x - x1) + (src.y - y2) * (src.y - y2);
+
+                    // Now interpolate as a weighted average of the four surrounding
+                    // points, where the weights are the distances to each of those points
+
+                    // If the point is exactly at one point of the grid of the source
+                    // image, then don't interpolate -- just assign the pixel
+
+                    if (d1 < gs_Epsilon)        // d1,d2,d3,d4 are positive -- no need for abs()
+                    {
+                        unsigned char *p = data[y1] + (3 * x1);
+                        *(dst++) = *(p++);
+                        *(dst++) = *(p++);
+                        *(dst++) = *p;
+
+                        if (has_alpha)
+                        {
+                            unsigned char *p = alpha[y1] + x1;
+                            *(alpha_dst++) = *p;
+                        }
+                    }
+                    else if (d2 < gs_Epsilon)
+                    {
+                        unsigned char *p = data[y1] + (3 * x2);
+                        *(dst++) = *(p++);
+                        *(dst++) = *(p++);
+                        *(dst++) = *p;
+
+                        if (has_alpha)
+                        {
+                            unsigned char *p = alpha[y1] + x2;
+                            *(alpha_dst++) = *p;
+                        }
+                    }
+                    else if (d3 < gs_Epsilon)
+                    {
+                        unsigned char *p = data[y2] + (3 * x2);
+                        *(dst++) = *(p++);
+                        *(dst++) = *(p++);
+                        *(dst++) = *p;
+
+                        if (has_alpha)
+                        {
+                            unsigned char *p = alpha[y2] + x2;
+                            *(alpha_dst++) = *p;
+                        }
+                    }
+                    else if (d4 < gs_Epsilon)
+                    {
+                        unsigned char *p = data[y2] + (3 * x1);
+                        *(dst++) = *(p++);
+                        *(dst++) = *(p++);
+                        *(dst++) = *p;
+
+                        if (has_alpha)
+                        {
+                            unsigned char *p = alpha[y2] + x1;
+                            *(alpha_dst++) = *p;
+                        }
+                    }
+                    else
+                    {
+                        // weights for the weighted average are proportional to the inverse of the distance
+                        unsigned char *v1 = data[y1] + (3 * x1);
+                        unsigned char *v2 = data[y1] + (3 * x2);
+                        unsigned char *v3 = data[y2] + (3 * x2);
+                        unsigned char *v4 = data[y2] + (3 * x1);
+
+                        const double w1 = 1/d1, w2 = 1/d2, w3 = 1/d3, w4 = 1/d4;
+
+                        // GRG: Unrolled.
+
+                        *(dst++) = (unsigned char)
+                            ( (w1 * *(v1++) + w2 * *(v2++) +
+                               w3 * *(v3++) + w4 * *(v4++)) /
+                              (w1 + w2 + w3 + w4) );
+                        *(dst++) = (unsigned char)
+                            ( (w1 * *(v1++) + w2 * *(v2++) +
+                               w3 * *(v3++) + w4 * *(v4++)) /
+                              (w1 + w2 + w3 + w4) );
+                        *(dst++) = (unsigned char)
+                            ( (w1 * *v1 + w2 * *v2 +
+                               w3 * *v3 + w4 * *v4) /
+                              (w1 + w2 + w3 + w4) );
+
+                        if (has_alpha)
+                        {
+                            unsigned char *v1 = alpha[y1] + (x1);
+                            unsigned char *v2 = alpha[y1] + (x2);
+                            unsigned char *v3 = alpha[y2] + (x2);
+                            unsigned char *v4 = alpha[y2] + (x1);
+
+                            *(alpha_dst++) = (unsigned char)
+                                ( (w1 * *v1 + w2 * *v2 +
+                                   w3 * *v3 + w4 * *v4) /
+                                  (w1 + w2 + w3 + w4) );
+                        }
+                    }
+                }
+                else
                 {
-                    data[pos] = 16;
-                    data[pos+1] = 16;
-                    data[pos+2] = 16;
-               }
+                    *(dst++) = blank_r;
+                    *(dst++) = blank_g;
+                    *(dst++) = blank_b;
+
+                    if (has_alpha)
+                        *(alpha_dst++) = 0;
+                }
             }
-*/
+        }
+    }
+    else    // not interpolating
+    {
+        for (int y = 0; y < rotated.GetHeight(); y++)
+        {
+            for (x = 0; x < rotated.GetWidth(); x++)
+            {
+                wxRealPoint src = rotated_point (x + x1, y + y1, cos_angle, -sin_angle, p0);
+
+                const int xs = wxCint (src.x);      // wxCint rounds to the
+                const int ys = wxCint (src.y);      // closest integer
+
+                if (0 <= xs && xs < GetWidth() &&
+                    0 <= ys && ys < GetHeight())
+                {
+                    unsigned char *p = data[ys] + (3 * xs);
+                    *(dst++) = *(p++);
+                    *(dst++) = *(p++);
+                    *(dst++) = *p;
 
-            pos += 3;
+                    if (has_alpha)
+                    {
+                        unsigned char *p = alpha[ys] + (xs);
+                        *(alpha_dst++) = *p;
+                    }
+                }
+                else
+                {
+                    *(dst++) = blank_r;
+                    *(dst++) = blank_g;
+                    *(dst++) = blank_b;
+
+                    if (has_alpha)
+                        *(alpha_dst++) = 255;
+                }
+            }
         }
     }
 
-    XDestroyImage( ximage );
-/*
-    if (gdk_image_mask) gdk_image_destroy( gdk_image_mask );
-*/
+    delete [] data;
+
+    if (has_alpha)
+        delete [] alpha;
+
+    return rotated;
 }
-#endif
+
+
+
+
+
+// A module to allow wxImage initialization/cleanup
+// without calling these functions from app.cpp or from
+// the user's application.
+
+class wxImageModule: public wxModule
+{
+DECLARE_DYNAMIC_CLASS(wxImageModule)
+public:
+    wxImageModule() {}
+    bool OnInit() { wxImage::InitStandardHandlers(); return true; };
+    void OnExit() { wxImage::CleanUpHandlers(); };
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxImageModule, wxModule)
+
+
+#endif // wxUSE_IMAGE