Added chapter on collection and container classes to contents

[wxWidgets.git] / src / gtk / bitmap.cpp

diff --git a/src/gtk/bitmap.cpp b/src/gtk/bitmap.cpp
index 80ecdcddac6ceacd6b699c80cb13e81cf796a716..ed3595f860625abc7f11e21d5f06230730e69c61 100644 (file)
--- a/src/gtk/bitmap.cpp
+++ b/src/gtk/bitmap.cpp
@@ -15,10 +15,26 @@
 #include "wx/icon.h"
 #include "wx/filefn.h"
 #include "wx/image.h"
 #include "wx/icon.h"
 #include "wx/filefn.h"
 #include "wx/image.h"

+#include "wx/dcmemory.h"

 
 

-#include "gdk/gdk.h"
-#include "gdk/gdkprivate.h"
-#include "gdk/gdkx.h"
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
+
+extern void gdk_wx_draw_bitmap     (GdkDrawable  *drawable,
+                          GdkGC               *gc,
+                          GdkDrawable  *src,
+                          gint                xsrc,
+                          gint                ysrc,
+                          gint                xdest,
+                          gint                ydest,
+                          gint                width,
+                          gint                height);
+
+//-----------------------------------------------------------------------------
+// data
+//-----------------------------------------------------------------------------
+
+extern GtkWidget *wxRootWindow;

 
 //-----------------------------------------------------------------------------
 // wxMask
 
 //-----------------------------------------------------------------------------
 // wxMask


@@ -31,24 +47,157 @@ wxMask::wxMask()
     m_bitmap = (GdkBitmap *) NULL;
 }
 
     m_bitmap = (GdkBitmap *) NULL;
 }
 

-wxMask::wxMask( const wxBitmap& WXUNUSED(bitmap), const wxColour& WXUNUSED(colour) )
+wxMask::wxMask( const wxBitmap& bitmap, const wxColour& colour )

 {
 {

+    m_bitmap = (GdkBitmap *) NULL;
+    Create( bitmap, colour );

 }
 
 }
 

-wxMask::wxMask( const wxBitmap& WXUNUSED(bitmap), int WXUNUSED(paletteIndex) )
+wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )

 {
 {

+    m_bitmap = (GdkBitmap *) NULL;
+    Create( bitmap, paletteIndex );

 }
 
 }
 

-wxMask::wxMask( const wxBitmap& WXUNUSED(bitmap) )
+wxMask::wxMask( const wxBitmap& bitmap )

 {
 {

+    m_bitmap = (GdkBitmap *) NULL;
+    Create( bitmap );

 }
 
 wxMask::~wxMask()
 {
 }
 
 wxMask::~wxMask()
 {

-    if (m_bitmap) gdk_bitmap_unref( m_bitmap );
+    if (m_bitmap)
+        gdk_bitmap_unref( m_bitmap );
+}
+
+bool wxMask::Create( const wxBitmap& bitmap,
+                     const wxColour& colour )
+{
+    if (m_bitmap)
+    {
+        gdk_bitmap_unref( m_bitmap );
+        m_bitmap = (GdkBitmap*) NULL;
+    }
+
+    wxImage image( bitmap );
+    if (!image.Ok()) return FALSE;
+
+    m_bitmap = gdk_pixmap_new( wxRootWindow->window, image.GetWidth(), image.GetHeight(), 1 );
+    GdkGC *gc = gdk_gc_new( m_bitmap );
+
+    GdkColor color;
+    color.red = 65000;
+    color.green = 65000;
+    color.blue = 65000;
+    color.pixel = 1;
+    gdk_gc_set_foreground( gc, &color );
+    gdk_gc_set_fill( gc, GDK_SOLID );
+    gdk_draw_rectangle( m_bitmap, gc, TRUE, 0, 0, image.GetWidth(), image.GetHeight() );
+
+    unsigned char *data = image.GetData();
+    int index = 0;
+
+    unsigned char red = colour.Red();
+    unsigned char green = colour.Green();
+    unsigned char blue = colour.Blue();
+
+    GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
+    wxASSERT( visual );
+    
+    int bpp = visual->depth;
+    if ((bpp == 16) && (visual->red_mask != 0xf800)) bpp = 15;
+    if (bpp == 15)
+    {
+        red = red & 0xf8;
+        green = green & 0xf8;
+        blue = blue & 0xf8;
+    }
+    if (bpp == 16)
+    {
+        red = red & 0xf8;
+        green = green & 0xfc;
+        blue = blue & 0xf8;
+    }
+
+    color.red = 0;
+    color.green = 0;
+    color.blue = 0;
+    color.pixel = 0;
+    gdk_gc_set_foreground( gc, &color );
+
+    for (int j = 0; j < image.GetHeight(); j++)
+    {
+        int start_x = -1;
+        int i;
+        for (i = 0; i < image.GetWidth(); i++)
+        {
+            if ((data[index] == red) &&
+                (data[index+1] == green) &&
+                (data[index+2] == blue))
+            {
+                if (start_x == -1)
+                start_x = i;
+            }
+            else
+            {
+                if (start_x != -1)
+                {
+                    gdk_draw_line( m_bitmap, gc, start_x, j, i-1, j );
+                    start_x = -1;
+                }
+            }
+            index += 3;
+        }
+        if (start_x != -1)
+            gdk_draw_line( m_bitmap, gc, start_x, j, i, j );
+    }
+
+    gdk_gc_unref( gc );
+
+    return TRUE;
+}
+
+bool wxMask::Create( const wxBitmap& WXUNUSED(bitmap),
+                     int WXUNUSED(paletteIndex) )
+{
+    if (m_bitmap)
+    {
+        gdk_bitmap_unref( m_bitmap );
+        m_bitmap = (GdkBitmap*) NULL;
+    }
+
+    wxFAIL_MSG( wxT("not implemented") );
+
+    return FALSE;
+}
+
+bool wxMask::Create( const wxBitmap& bitmap )
+{
+    if (m_bitmap)
+    {
+        gdk_bitmap_unref( m_bitmap );
+        m_bitmap = (GdkBitmap*) NULL;
+    }
+
+    if (!bitmap.Ok()) return FALSE;
+
+    wxCHECK_MSG( bitmap.GetBitmap(), FALSE, wxT("Cannot create mask from colour bitmap") );
+
+    m_bitmap = gdk_pixmap_new( wxRootWindow->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
+
+    if (!m_bitmap) return FALSE;
+
+    GdkGC *gc = gdk_gc_new( m_bitmap );
+
+    gdk_wx_draw_bitmap( m_bitmap, gc, bitmap.GetBitmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight() );
+
+    gdk_gc_unref( gc );
+
+    return TRUE;

 }
 
 }
 

-GdkBitmap *wxMask::GetBitmap(void) const
+GdkBitmap *wxMask::GetBitmap() const

 {
     return m_bitmap;
 }
 {
     return m_bitmap;
 }


@@ -60,16 +209,16 @@ GdkBitmap *wxMask::GetBitmap(void) const
 class wxBitmapRefData: public wxObjectRefData
 {
 public:
 class wxBitmapRefData: public wxObjectRefData
 {
 public:

-  wxBitmapRefData(void);
-  ~wxBitmapRefData(void);
-
-  GdkPixmap      *m_pixmap;
-  GdkBitmap      *m_bitmap;
-  wxMask         *m_mask;
-  int             m_width;
-  int             m_height;
-  int             m_bpp;
-  wxPalette      *m_palette;
+    wxBitmapRefData();
+    ~wxBitmapRefData();
+
+    GdkPixmap      *m_pixmap;
+    GdkBitmap      *m_bitmap;
+    wxMask         *m_mask;
+    int             m_width;
+    int             m_height;
+    int             m_bpp;
+    wxPalette      *m_palette;

 };
 
 wxBitmapRefData::wxBitmapRefData()
 };
 
 wxBitmapRefData::wxBitmapRefData()


@@ -104,13 +253,24 @@ wxBitmap::wxBitmap()
 
 wxBitmap::wxBitmap( int width, int height, int depth )
 {
 
 wxBitmap::wxBitmap( int width, int height, int depth )
 {

-    wxCHECK_RET( (width > 0) && (height > 0), _T("invalid bitmap size") )
-    
-    GdkWindow *parent = (GdkWindow*) &gdk_root_parent;
-    if (depth == -1) depth = gdk_window_get_visual( parent )->depth;
-    
-    wxCHECK_RET( (depth ==  gdk_window_get_visual( parent )->depth) ||
-                 (depth == 1), _T("invalid bitmap depth") )
+    Create( width, height, depth );
+
+    if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
+}
+
+bool wxBitmap::Create( int width, int height, int depth )
+{
+    UnRef();
+
+    wxCHECK_MSG( (width > 0) && (height > 0), FALSE, wxT("invalid bitmap size") )
+
+    GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
+    wxASSERT( visual );
+
+    if (depth == -1) depth = visual->depth;
+
+    wxCHECK_MSG( (depth == visual->depth) ||
+                 (depth == 1), FALSE, wxT("invalid bitmap depth") )

 
     m_refData = new wxBitmapRefData();
     M_BMPDATA->m_mask = (wxMask *) NULL;
 
     m_refData = new wxBitmapRefData();
     M_BMPDATA->m_mask = (wxMask *) NULL;


@@ -118,53 +278,31 @@ wxBitmap::wxBitmap( int width, int height, int depth )
     M_BMPDATA->m_height = height;
     if (depth == 1)
     {
     M_BMPDATA->m_height = height;
     if (depth == 1)
     {

-        M_BMPDATA->m_bitmap = gdk_pixmap_new( parent, width, height, 1 );
+        M_BMPDATA->m_bitmap = gdk_pixmap_new( wxRootWindow->window, width, height, 1 );

         M_BMPDATA->m_bpp = 1;
     }
     else
     {
         M_BMPDATA->m_bpp = 1;
     }
     else
     {

-        M_BMPDATA->m_pixmap = gdk_pixmap_new( parent, width, height, depth );
-        M_BMPDATA->m_bpp = gdk_window_get_visual( parent )->depth;
-    }
-
-    if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
-}
-
-wxBitmap::wxBitmap( const char **bits )
-{
-    wxCHECK_RET( bits != NULL, _T("invalid bitmap data") )
-
-    m_refData = new wxBitmapRefData();
-
-    GdkBitmap *mask = (GdkBitmap*) NULL;
-    GdkWindow *parent = (GdkWindow*) &gdk_root_parent;
-
-    M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( parent, &mask, NULL, (gchar **) bits );
-
-    if (mask)
-    {
-        M_BMPDATA->m_mask = new wxMask();
-        M_BMPDATA->m_mask->m_bitmap = mask;
+        M_BMPDATA->m_pixmap = gdk_pixmap_new( wxRootWindow->window, width, height, depth );
+        M_BMPDATA->m_bpp = visual->depth;

     }
 
     }
 

-    gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
-
-    M_BMPDATA->m_bpp = gdk_window_get_visual( parent )->depth;  // ?
-    if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
+    return Ok();

 }
 }

-
-wxBitmap::wxBitmap( char **bits )
+bool wxBitmap::CreateFromXpm( const char **bits )

 {
 {

-    wxCHECK_RET( bits != NULL, _T("invalid bitmap data") )
+    wxCHECK_MSG( bits != NULL, FALSE, wxT("invalid bitmap data") )

 
 

+    GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
+    wxASSERT( visual );
+    

     m_refData = new wxBitmapRefData();
 
     GdkBitmap *mask = (GdkBitmap*) NULL;
     m_refData = new wxBitmapRefData();
 
     GdkBitmap *mask = (GdkBitmap*) NULL;

-    GdkWindow *parent = (GdkWindow*) &gdk_root_parent;

 
 

-    M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( parent, &mask, NULL, (gchar **) bits );
+    M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm_d( wxRootWindow->window, &mask, NULL, (gchar **) bits );

 
 

-    wxCHECK_RET( M_BMPDATA->m_pixmap, _T("couldn't create pixmap") );
+    wxCHECK_MSG( M_BMPDATA->m_pixmap, FALSE, wxT("couldn't create pixmap") );

 
     if (mask)
     {
 
     if (mask)
     {


@@ -174,8 +312,11 @@ wxBitmap::wxBitmap( char **bits )
 
     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 
 
     gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
 

-    M_BMPDATA->m_bpp = gdk_window_get_visual( parent )->depth;  // ?
+    M_BMPDATA->m_bpp = visual->depth;  // ?
+    

     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);

+
+    return TRUE;

 }
 
 wxBitmap::wxBitmap( const wxBitmap& bmp )
 }
 
 wxBitmap::wxBitmap( const wxBitmap& bmp )


@@ -198,12 +339,12 @@ wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth
 
     M_BMPDATA->m_mask = (wxMask *) NULL;
     M_BMPDATA->m_bitmap =
 
     M_BMPDATA->m_mask = (wxMask *) NULL;
     M_BMPDATA->m_bitmap =

-      gdk_bitmap_create_from_data( (GdkWindow*) &gdk_root_parent, (gchar *) bits, width, height );
+      gdk_bitmap_create_from_data( wxRootWindow->window, (gchar *) bits, width, height );

     M_BMPDATA->m_width = width;
     M_BMPDATA->m_height = height;
     M_BMPDATA->m_bpp = 1;
 
     M_BMPDATA->m_width = width;
     M_BMPDATA->m_height = height;
     M_BMPDATA->m_bpp = 1;
 

-    wxCHECK_RET( M_BMPDATA->m_bitmap, _T("couldn't create bitmap") );
+    wxCHECK_RET( M_BMPDATA->m_bitmap, wxT("couldn't create bitmap") );

 
     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 }
 
     if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
 }


@@ -220,66 +361,104 @@ wxBitmap& wxBitmap::operator = ( const wxBitmap& bmp )
     return *this;
 }
 
     return *this;
 }
 

-bool wxBitmap::operator == ( const wxBitmap& bmp )
+bool wxBitmap::operator == ( const wxBitmap& bmp ) const

 {
     return m_refData == bmp.m_refData;
 }
 
 {
     return m_refData == bmp.m_refData;
 }
 

-bool wxBitmap::operator != ( const wxBitmap& bmp )
+bool wxBitmap::operator != ( const wxBitmap& bmp ) const

 {
     return m_refData != bmp.m_refData;
 }
 
 {
     return m_refData != bmp.m_refData;
 }
 

-bool wxBitmap::Ok(void) const
+bool wxBitmap::Ok() const

 {
     return (m_refData != NULL);
 }
 
 {
     return (m_refData != NULL);
 }
 

-int wxBitmap::GetHeight(void) const
+int wxBitmap::GetHeight() const

 {
 {

-    wxCHECK_MSG( Ok(), -1, _T("invalid bitmap") );
+    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );

 
     return M_BMPDATA->m_height;
 }
 
 
     return M_BMPDATA->m_height;
 }
 

-int wxBitmap::GetWidth(void) const
+int wxBitmap::GetWidth() const

 {
 {

-    wxCHECK_MSG( Ok(), -1, _T("invalid bitmap") );
+    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );

 
     return M_BMPDATA->m_width;
 }
 
 
     return M_BMPDATA->m_width;
 }
 

-int wxBitmap::GetDepth(void) const
+int wxBitmap::GetDepth() const

 {
 {

-    wxCHECK_MSG( Ok(), -1, _T("invalid bitmap") );
+    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );

 
     return M_BMPDATA->m_bpp;
 }
 
 
     return M_BMPDATA->m_bpp;
 }
 

-wxMask *wxBitmap::GetMask(void) const
+wxMask *wxBitmap::GetMask() const

 {
 {

-    wxCHECK_MSG( Ok(), (wxMask *) NULL, _T("invalid bitmap") );
+    wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );

 
     return M_BMPDATA->m_mask;
 }
 
 void wxBitmap::SetMask( wxMask *mask )
 {
 
     return M_BMPDATA->m_mask;
 }
 
 void wxBitmap::SetMask( wxMask *mask )
 {

-    wxCHECK_RET( Ok(), _T("invalid bitmap") );
+    wxCHECK_RET( Ok(), wxT("invalid bitmap") );

 
     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
 
     M_BMPDATA->m_mask = mask;
 }
 
 
     if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
 
     M_BMPDATA->m_mask = mask;
 }
 

+wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
+{
+    wxCHECK_MSG( Ok() &&
+                 (rect.x >= 0) && (rect.y >= 0) &&
+                 (rect.x+rect.width <= M_BMPDATA->m_width) && (rect.y+rect.height <= M_BMPDATA->m_height),
+                 wxNullBitmap, wxT("invalid bitmap or bitmap region") );
+
+    wxBitmap ret( rect.width, rect.height, M_BMPDATA->m_bpp );
+    wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
+
+    if (ret.GetPixmap())
+    {
+        GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
+        gdk_draw_pixmap( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
+        gdk_gc_destroy( gc );
+    }
+    else
+    {
+        GdkGC *gc = gdk_gc_new( ret.GetBitmap() );
+        gdk_wx_draw_bitmap( ret.GetBitmap(), gc, GetBitmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
+        gdk_gc_destroy( gc );
+    }
+
+    if (GetMask())
+    {
+        wxMask *mask = new wxMask;
+        mask->m_bitmap = gdk_pixmap_new( wxRootWindow->window, rect.width, rect.height, 1 );
+
+        GdkGC *gc = gdk_gc_new( mask->m_bitmap );
+        gdk_wx_draw_bitmap( mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, 0, 0, rect.x, rect.y, rect.width, rect.height );
+        gdk_gc_destroy( gc );
+
+        ret.SetMask( mask );
+    }
+
+    return ret;
+}
+

 bool wxBitmap::SaveFile( const wxString &name, int type, wxPalette *WXUNUSED(palette) )
 {
 bool wxBitmap::SaveFile( const wxString &name, int type, wxPalette *WXUNUSED(palette) )
 {

-    wxCHECK_MSG( Ok(), FALSE, _T("invalid bitmap") );
+    wxCHECK_MSG( Ok(), FALSE, wxT("invalid bitmap") );

 
 

-    if (type == wxBITMAP_TYPE_PNG)
+    // Try to save the bitmap via wxImage handlers:

     {
         wxImage image( *this );
     {
         wxImage image( *this );

-       if (image.Ok()) return image.SaveFile( name, type );
+        if (image.Ok()) return image.SaveFile( name, type );

     }
 
     return FALSE;
     }
 
     return FALSE;


@@ -291,14 +470,16 @@ bool wxBitmap::LoadFile( const wxString &name, int type )
 
     if (!wxFileExists(name)) return FALSE;
 
 
     if (!wxFileExists(name)) return FALSE;
 

+    GdkVisual *visual = gdk_window_get_visual( wxRootWindow->window );
+    wxASSERT( visual );
+    

     if (type == wxBITMAP_TYPE_XPM)
     {
         m_refData = new wxBitmapRefData();
 
         GdkBitmap *mask = (GdkBitmap*) NULL;
     if (type == wxBITMAP_TYPE_XPM)
     {
         m_refData = new wxBitmapRefData();
 
         GdkBitmap *mask = (GdkBitmap*) NULL;

-        GdkWindow *parent = (GdkWindow*) &gdk_root_parent;

 
 

-        M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm( parent, &mask, NULL, name.fn_str() );
+        M_BMPDATA->m_pixmap = gdk_pixmap_create_from_xpm( wxRootWindow->window, &mask, NULL, name.fn_str() );

 
         if (mask)
         {
 
         if (mask)
         {


@@ -307,27 +488,21 @@ bool wxBitmap::LoadFile( const wxString &name, int type )
         }
 
         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
         }
 
         gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );

-        M_BMPDATA->m_bpp = gdk_window_get_visual( parent )->depth;
-    }
-    else if (type == wxBITMAP_TYPE_PNG)
-    {
-        wxImage image;
-        image.LoadFile( name, type );
-        if (image.Ok()) *this = image.ConvertToBitmap();
+        
+        M_BMPDATA->m_bpp = visual->depth;

     }
     }

-    else if (type == wxBITMAP_TYPE_BMP)
+    else // try if wxImage can load it

     {
         wxImage image;
     {
         wxImage image;

-        image.LoadFile( name, type );
+        if (!image.LoadFile( name, type )) return FALSE;

         if (image.Ok()) *this = image.ConvertToBitmap();
         if (image.Ok()) *this = image.ConvertToBitmap();

+        else return FALSE;

     }
     }

-    else
-        return FALSE;

 
     return TRUE;
 }
 
 
     return TRUE;
 }
 

-wxPalette *wxBitmap::GetPalette(void) const
+wxPalette *wxBitmap::GetPalette() const

 {
     if (!Ok()) return (wxPalette *) NULL;
 
 {
     if (!Ok()) return (wxPalette *) NULL;
 


@@ -362,16 +537,23 @@ void wxBitmap::SetPixmap( GdkPixmap *pixmap )
     M_BMPDATA->m_pixmap = pixmap;
 }
 
     M_BMPDATA->m_pixmap = pixmap;
 }
 

-GdkPixmap *wxBitmap::GetPixmap(void) const
+void wxBitmap::SetBitmap( GdkPixmap *bitmap )
+{
+    if (!m_refData) m_refData = new wxBitmapRefData();
+
+    M_BMPDATA->m_bitmap = bitmap;
+}
+
+GdkPixmap *wxBitmap::GetPixmap() const

 {
 {

-    wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, _T("invalid bitmap") );
+    wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );

 
     return M_BMPDATA->m_pixmap;
 }
 
 
     return M_BMPDATA->m_pixmap;
 }
 

-GdkBitmap *wxBitmap::GetBitmap(void) const
+GdkBitmap *wxBitmap::GetBitmap() const

 {
 {

-    wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, _T("invalid bitmap") );
+    wxCHECK_MSG( Ok(), (GdkBitmap *) NULL, wxT("invalid bitmap") );

 
     return M_BMPDATA->m_bitmap;
 }
 
     return M_BMPDATA->m_bitmap;
 }