X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/219f895a273cdf12ded3f79dbbcd1e076fe83901..c4e43bea7b24f7b7f58e3f87786490cd81abf0a7:/src/gtk/bitmap.cpp?ds=inline

diff --git a/src/gtk/bitmap.cpp b/src/gtk/bitmap.cpp
index 05c3136acc..e5f2b669d1 100644
--- a/src/gtk/bitmap.cpp
+++ b/src/gtk/bitmap.cpp
@@ -1,392 +1,984 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        bitmap.cpp
+// Name:        src/gtk/bitmap.cpp
 // Purpose:
 // Author:      Robert Roebling
-// Created:     01/02/97
 // RCS-ID:      $Id$
-// Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
-// Licence:   	wxWindows licence
+// Copyright:   (c) 1998 Robert Roebling
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
-#pragma implementation "bitmap.h"
-#endif
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
 
 #include "wx/bitmap.h"
-#include "gdk/gdkprivate.h"
 
-#ifdef USE_GDK_IMLIB
-#include "../gdk_imlib/gdk_imlib.h"
+#ifndef WX_PRECOMP
+    #include "wx/app.h"
+    #include "wx/palette.h"
+    #include "wx/icon.h"
+    #include "wx/math.h"
+    #include "wx/image.h"
+    #include "wx/colour.h"
 #endif
 
+#include "wx/rawbmp.h"
+
+#include <gtk/gtk.h>
+
+//-----------------------------------------------------------------------------
+// data
+//-----------------------------------------------------------------------------
+
+extern GtkWidget *wxGetRootWindow();
+
 //-----------------------------------------------------------------------------
 // wxMask
 //-----------------------------------------------------------------------------
 
 IMPLEMENT_DYNAMIC_CLASS(wxMask,wxObject)
 
-wxMask::wxMask(void)
+wxMask::wxMask()
 {
-  m_bitmap = 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) )
+#if wxUSE_PALETTE
+wxMask::wxMask( const wxBitmap& bitmap, int paletteIndex )
 {
-};
+    m_bitmap = (GdkBitmap *) NULL;
+    Create( bitmap, paletteIndex );
+}
+#endif // wxUSE_PALETTE
 
-wxMask::wxMask( const wxBitmap& WXUNUSED(bitmap) )
+wxMask::wxMask( const wxBitmap& bitmap )
 {
-};
+    m_bitmap = (GdkBitmap *) NULL;
+    Create( bitmap );
+}
 
-wxMask::~wxMask(void)
+wxMask::~wxMask()
 {
-#ifdef USE_GDK_IMLIB
-  // do not delete the mask, gdk_imlib does it for you
-#else
-  if (m_bitmap) gdk_bitmap_unref( m_bitmap );
-#endif  
-};
+    if (m_bitmap)
+        g_object_unref (m_bitmap);
+}
 
-GdkBitmap *wxMask::GetBitmap(void) const
+bool wxMask::Create( const wxBitmap& bitmap,
+                     const wxColour& colour )
+{
+    if (m_bitmap)
+    {
+        g_object_unref (m_bitmap);
+        m_bitmap = (GdkBitmap*) NULL;
+    }
+
+    const int w = bitmap.GetWidth();
+    const int h = bitmap.GetHeight();
+
+    // create mask as XBM format bitmap
+
+    // one bit per pixel, each row starts on a byte boundary
+    const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
+    wxByte* out = new wxByte[out_size];
+    // set bits are unmasked
+    memset(out, 0xff, out_size);
+    unsigned bit_index = 0;
+    if (bitmap.HasPixbuf())
+    {
+        const wxByte r_mask = colour.Red();
+        const wxByte g_mask = colour.Green();
+        const wxByte b_mask = colour.Blue();
+        GdkPixbuf* pixbuf = bitmap.GetPixbuf();
+        const wxByte* in = gdk_pixbuf_get_pixels(pixbuf);
+        const int inc = 3 + int(gdk_pixbuf_get_has_alpha(pixbuf) != 0);
+        const int rowpadding = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
+        for (int y = 0; y < h; y++, in += rowpadding)
+        {
+            for (int x = 0; x < w; x++, in += inc, bit_index++)
+                if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
+                    out[bit_index >> 3] ^= 1 << (bit_index & 7);
+            // move index to next byte boundary
+            bit_index = (bit_index + 7) & ~7u;
+        }
+    }
+    else
+    {
+        GdkImage* image = gdk_drawable_get_image(bitmap.GetPixmap(), 0, 0, w, h);
+        GdkColormap* colormap = gdk_image_get_colormap(image);
+        guint32 mask_pixel;
+        if (colormap == NULL)
+            // mono bitmap, white is pixel value 0
+            mask_pixel = guint32(colour.Red() != 255 || colour.Green() != 255 || colour.Blue() != 255);
+        else
+        {
+            wxColor c(colour);
+            c.CalcPixel(colormap);
+            mask_pixel = c.GetPixel();
+        }
+        for (int y = 0; y < h; y++)
+        {
+            for (int x = 0; x < w; x++, bit_index++)
+                if (gdk_image_get_pixel(image, x, y) == mask_pixel)
+                    out[bit_index >> 3] ^= 1 << (bit_index & 7);
+            bit_index = (bit_index + 7) & ~7u;
+        }
+        g_object_unref(image);
+    }
+    m_bitmap = gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h);
+    delete[] out;
+    return true;
+}
+
+#if wxUSE_PALETTE
+bool wxMask::Create( const wxBitmap& bitmap, int paletteIndex )
 {
-  return m_bitmap;
-};
-  
+    unsigned char r,g,b;
+    wxPalette *pal = bitmap.GetPalette();
+
+    wxCHECK_MSG( pal, false, wxT("Cannot create mask from bitmap without palette") );
+
+    pal->GetRGB(paletteIndex, &r, &g, &b);
+
+    return Create(bitmap, wxColour(r, g, b));
+}
+#endif // wxUSE_PALETTE
+
+bool wxMask::Create( const wxBitmap& bitmap )
+{
+    if (m_bitmap)
+    {
+        g_object_unref (m_bitmap);
+        m_bitmap = (GdkBitmap*) NULL;
+    }
+
+    if (!bitmap.Ok()) return false;
+
+    wxCHECK_MSG( bitmap.GetDepth() == 1, false, wxT("Cannot create mask from colour bitmap") );
+
+    m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, bitmap.GetWidth(), bitmap.GetHeight(), 1 );
+
+    if (!m_bitmap) return false;
+
+    GdkGC *gc = gdk_gc_new( m_bitmap );
+    gdk_gc_set_function(gc, GDK_COPY_INVERT);
+    gdk_draw_drawable(m_bitmap, gc, bitmap.GetPixmap(), 0, 0, 0, 0, bitmap.GetWidth(), bitmap.GetHeight());
+    g_object_unref (gc);
+
+    return true;
+}
+
+GdkBitmap *wxMask::GetBitmap() const
+{
+    return m_bitmap;
+}
+
 //-----------------------------------------------------------------------------
 // wxBitmap
 //-----------------------------------------------------------------------------
 
-// CMB 20/5/98: added m_bitmap for GdkBitmaps
 class wxBitmapRefData: public wxObjectRefData
 {
-  public:
-  
-    wxBitmapRefData(void);
-    ~wxBitmapRefData(void);
-  
+public:
+    wxBitmapRefData();
+    virtual ~wxBitmapRefData();
+
     GdkPixmap      *m_pixmap;
-    GdkBitmap      *m_bitmap;
+    GdkPixbuf      *m_pixbuf;
     wxMask         *m_mask;
     int             m_width;
     int             m_height;
     int             m_bpp;
-#ifdef USE_GDK_IMLIB
-    GdkImlibImage  *m_image;
-#endif
+#if wxUSE_PALETTE
     wxPalette      *m_palette;
+#endif // wxUSE_PALETTE
 };
 
-wxBitmapRefData::wxBitmapRefData(void)
+wxBitmapRefData::wxBitmapRefData()
 {
-  m_pixmap = NULL;
-  m_bitmap = NULL;
-  m_mask = NULL;
-  m_width = 0;
-  m_height = 0;
-  m_bpp = 0;
-  m_palette = NULL;
-};
+    m_pixmap = (GdkPixmap *) NULL;
+    m_pixbuf = (GdkPixbuf *) NULL;
+    m_mask = (wxMask *) NULL;
+    m_width = 0;
+    m_height = 0;
+    m_bpp = 0;
+#if wxUSE_PALETTE
+    m_palette = (wxPalette *) NULL;
+#endif // wxUSE_PALETTE
+}
 
-wxBitmapRefData::~wxBitmapRefData(void)
+wxBitmapRefData::~wxBitmapRefData()
 {
-#ifdef USE_GDK_IMLIB
-  if (m_pixmap) gdk_imlib_free_pixmap( m_pixmap );
-  if (m_image) gdk_imlib_destroy_image( m_image );
-#else
-  if (m_pixmap) gdk_pixmap_unref( m_pixmap );
-#endif
-  if (m_bitmap) gdk_bitmap_unref( m_bitmap );
-  if (m_mask) delete m_mask;
-  if (m_palette) delete m_palette;
-};
+    if (m_pixmap)
+        g_object_unref (m_pixmap);
+    if (m_pixbuf)
+        g_object_unref (m_pixbuf);
+    delete m_mask;
+#if wxUSE_PALETTE
+    delete m_palette;
+#endif // wxUSE_PALETTE
+}
 
 //-----------------------------------------------------------------------------
 
-#define M_BMPDATA ((wxBitmapRefData *)m_refData)
+#define M_BMPDATA wx_static_cast(wxBitmapRefData*, m_refData)
 
 IMPLEMENT_DYNAMIC_CLASS(wxBitmap,wxGDIObject)
 
-wxBitmap::wxBitmap(void)
+wxBitmap::wxBitmap(int width, int height, int depth)
 {
-  if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
-};
-  
-wxBitmap::wxBitmap( int width, int height, int depth )
-{
-  m_refData = new wxBitmapRefData();
-  M_BMPDATA->m_mask = NULL;
-  M_BMPDATA->m_pixmap = 
-    gdk_pixmap_new( (GdkWindow*) &gdk_root_parent, width, height, depth );
-  gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
-  M_BMPDATA->m_bpp = depth;
-   
-  if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
-};
+    Create(width, height, depth);
+}
 
-wxBitmap::wxBitmap( char **bits )
+wxBitmap::wxBitmap(const wxString &filename, wxBitmapType type)
 {
-  m_refData = new wxBitmapRefData();
+    LoadFile(filename, type);
+}
 
-#ifndef USE_GDK_IMLIB
+wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
+{
+    wxASSERT(depth == 1);
+    if (width > 0 && height > 0 && depth == 1)
+    {
+        SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, bits, width, height));
 
-  GdkBitmap *mask = NULL;
-  
-  M_BMPDATA->m_pixmap = 
-    gdk_pixmap_create_from_xpm_d( (GdkWindow*) &gdk_root_parent, &mask, NULL, (gchar **) bits );
-    
-  if (mask)
-  {
-    M_BMPDATA->m_mask = new wxMask();
-    M_BMPDATA->m_mask->m_bitmap = mask;
-  };
-  
-#else
+        wxASSERT_MSG( M_BMPDATA->m_pixmap, wxT("couldn't create bitmap") );
+    }
+}
 
-  M_BMPDATA->m_image = gdk_imlib_create_image_from_xpm_data( bits );
-  Render();
-  
-#endif
-				  
-  gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
-  M_BMPDATA->m_bpp = 24; // ?
-   
-  if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
-};
-  
-wxBitmap::wxBitmap( const wxBitmap& bmp )
+wxBitmap::wxBitmap(const char* const* bits)
 {
-  Ref( bmp );
-   
-  if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
-};
-  
-wxBitmap::wxBitmap( const wxBitmap* bmp )
+    wxCHECK2_MSG(bits != NULL, return, wxT("invalid bitmap data"));
+
+    GdkBitmap* mask = NULL;
+    SetPixmap(gdk_pixmap_create_from_xpm_d(wxGetRootWindow()->window, &mask, NULL, wx_const_cast(char**, bits)));
+
+    if (M_BMPDATA->m_pixmap != NULL && mask != NULL)
+    {
+        M_BMPDATA->m_mask = new wxMask;
+        M_BMPDATA->m_mask->m_bitmap = mask;
+    }
+}
+
+wxBitmap::~wxBitmap()
 {
-  if (bmp) Ref( *bmp );
-   
-  if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
-};
+}
 
-wxBitmap::wxBitmap( const wxString &filename, int type )
+bool wxBitmap::Create( int width, int height, int depth )
 {
-  LoadFile( filename, type );
-};
+    UnRef();
+
+    if ( width <= 0 || height <= 0 )
+    {
+        return false;
+    }
+
+    if (depth == 32)
+    {
+        SetPixbuf(gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8, width, height), 32);
+    }
+    else
+    {
+        if (depth != 1)
+        {
+            const GdkVisual* visual = wxTheApp->GetGdkVisual();
+            if (depth == -1)
+                depth = visual->depth;
+
+            wxCHECK_MSG(depth == visual->depth, false, wxT("invalid bitmap depth"));
+        }
+
+        SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, width, height, depth));
+    }
+
+    return Ok();
+}
+
+wxBitmap wxBitmap::Rescale(int clipx, int clipy, int clipwidth, int clipheight, int newx, int newy) const
+{
+    wxBitmap bmp;
+
+    wxCHECK_MSG(Ok(), bmp, wxT("invalid bitmap"));
+
+    int width = wxMax(newx, 1);
+    int height = wxMax(newy, 1);
+    width = wxMin(width, clipwidth);
+    height = wxMin(height, clipheight);
+
+    const double scale_x = double(newx) / M_BMPDATA->m_width;
+    const double scale_y = double(newy) / M_BMPDATA->m_height;
+
+    // Converting to pixbuf, scaling with gdk_pixbuf_scale, and converting
+    // back, is faster than scaling pixmap ourselves.
+
+    // use pixbuf if already available,
+    // otherwise create temporary pixbuf from pixmap
+    GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
+    if (pixbuf)
+        g_object_ref(pixbuf);
+    else
+        pixbuf = gdk_pixbuf_get_from_drawable(
+            NULL, M_BMPDATA->m_pixmap, NULL,
+            0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
+
+    // new pixbuf for scaled wxBitmap
+    GdkPixbuf* pixbuf_scaled = gdk_pixbuf_new(
+        GDK_COLORSPACE_RGB, gdk_pixbuf_get_has_alpha(pixbuf), 8, width, height);
+
+    // GDK_INTERP_NEAREST is the lowest-quality method for continuous-tone
+    // images, but the only one which preserves sharp edges
+    gdk_pixbuf_scale(
+        pixbuf, pixbuf_scaled,
+        0, 0, width, height, -clipx, -clipy, scale_x, scale_y,
+        GDK_INTERP_NEAREST);
+
+    g_object_unref(pixbuf);
+    bmp.SetPixbuf(pixbuf_scaled, M_BMPDATA->m_bpp);
+
+    if (M_BMPDATA->m_mask)
+    {
+        pixbuf = gdk_pixbuf_get_from_drawable(
+            NULL, M_BMPDATA->m_mask->m_bitmap, NULL,
+            0, 0, 0, 0, M_BMPDATA->m_width, M_BMPDATA->m_height);
+
+        pixbuf_scaled = gdk_pixbuf_new(
+            GDK_COLORSPACE_RGB, false, 8, width, height);
+
+        gdk_pixbuf_scale(
+            pixbuf, pixbuf_scaled,
+            0, 0, width, height, -clipx, -clipy, scale_x, scale_y,
+            GDK_INTERP_NEAREST);
+
+        g_object_unref(pixbuf);
+
+        // use existing functionality to create mask from scaled pixbuf
+        wxBitmap maskbmp;
+        maskbmp.SetPixbuf(pixbuf_scaled);
+        bmp.SetMask(new wxMask(maskbmp, *wxBLACK));
+    }
+    return bmp;
+}
 
-// CMB 15/5/98: add constructor for xbm bitmaps
-wxBitmap::wxBitmap( const char bits[], int width, int height, int WXUNUSED(depth))
+#if wxUSE_IMAGE
+
+bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 {
-  m_refData = new wxBitmapRefData();
+    UnRef();
+
+    wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
+    wxCHECK_MSG( depth == -1 || depth == 1, false, wxT("invalid bitmap depth") );
 
-  M_BMPDATA->m_mask = NULL;
-  M_BMPDATA->m_bitmap = 
-    gdk_bitmap_create_from_data( (GdkWindow*) &gdk_root_parent, (gchar *) bits, width, height );
-  gdk_window_get_size( M_BMPDATA->m_bitmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
-  M_BMPDATA->m_bpp = 1;
+    if (image.GetWidth() <= 0 || image.GetHeight() <= 0)
+        return false;
+
+    // create pixbuf if image has alpha and requested depth is compatible
+    if (image.HasAlpha() && (depth == -1 || depth == 32))
+        return CreateFromImageAsPixbuf(image);
+
+    // otherwise create pixmap, if alpha is present it will be converted to mask
+    return CreateFromImageAsPixmap(image, depth);
+}
 
-  if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
+bool wxBitmap::CreateFromImageAsPixmap(const wxImage& image, int depth)
+{
+    const int w = image.GetWidth();
+    const int h = image.GetHeight();
+    if (depth == 1)
+    {
+        // create XBM format bitmap
+
+        // one bit per pixel, each row starts on a byte boundary
+        const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
+        wxByte* out = new wxByte[out_size];
+        // set bits are black
+        memset(out, 0xff, out_size);
+        const wxByte* in = image.GetData();
+        unsigned bit_index = 0;
+        for (int y = 0; y < h; y++)
+        {
+            for (int x = 0; x < w; x++, in += 3, bit_index++)
+                if (in[0] == 255 && in[1] == 255 && in[2] == 255)
+                    out[bit_index >> 3] ^= 1 << (bit_index & 7);
+            // move index to next byte boundary
+            bit_index = (bit_index + 7) & ~7u;
+        }
+        SetPixmap(gdk_bitmap_create_from_data(wxGetRootWindow()->window, (char*)out, w, h));
+        delete[] out;
+    }
+    else
+    {
+        SetPixmap(gdk_pixmap_new(wxGetRootWindow()->window, w, h, depth));
+        GdkGC* gc = gdk_gc_new(M_BMPDATA->m_pixmap);
+        gdk_draw_rgb_image(
+            M_BMPDATA->m_pixmap, gc,
+            0, 0, w, h,
+            GDK_RGB_DITHER_NONE, image.GetData(), w * 3);
+        g_object_unref(gc);
+    }
+
+    const wxByte* alpha = image.GetAlpha();
+    if (alpha != NULL || image.HasMask())
+    {
+        // create mask as XBM format bitmap
+
+        const size_t out_size = size_t((w + 7) / 8) * unsigned(h);
+        wxByte* out = new wxByte[out_size];
+        memset(out, 0xff, out_size);
+        unsigned bit_index = 0;
+        if (alpha != NULL)
+        {
+            for (int y = 0; y < h; y++)
+            {
+                for (int x = 0; x < w; x++, bit_index++)
+                    if (*alpha++ < wxIMAGE_ALPHA_THRESHOLD)
+                        out[bit_index >> 3] ^= 1 << (bit_index & 7);
+                bit_index = (bit_index + 7) & ~7u;
+            }
+        }
+        else
+        {
+            const wxByte r_mask = image.GetMaskRed();
+            const wxByte g_mask = image.GetMaskGreen();
+            const wxByte b_mask = image.GetMaskBlue();
+            const wxByte* in = image.GetData();
+            for (int y = 0; y < h; y++)
+            {
+                for (int x = 0; x < w; x++, in += 3, bit_index++)
+                    if (in[0] == r_mask && in[1] == g_mask && in[2] == b_mask)
+                        out[bit_index >> 3] ^= 1 << (bit_index & 7);
+                bit_index = (bit_index + 7) & ~7u;
+            }
+        }
+        wxMask* mask = new wxMask;
+        mask->m_bitmap = gdk_bitmap_create_from_data(M_BMPDATA->m_pixmap, (char*)out, w, h);
+        SetMask(mask);
+        delete[] out;
+    }
+    return true;
 }
-  
-wxBitmap::~wxBitmap(void)
+
+bool wxBitmap::CreateFromImageAsPixbuf(const wxImage& image)
 {
-  if (wxTheBitmapList) wxTheBitmapList->DeleteObject(this);
-};
-  
-wxBitmap& wxBitmap::operator = ( const wxBitmap& bmp )
+    wxASSERT(image.HasAlpha());
+
+    int width = image.GetWidth();
+    int height = image.GetHeight();
+
+    Create(width, height, 32);
+    GdkPixbuf* pixbuf = M_BMPDATA->m_pixbuf;
+    if (!pixbuf)
+        return false;
+
+    // Copy the data:
+    const unsigned char* in = image.GetData();
+    unsigned char *out = gdk_pixbuf_get_pixels(pixbuf);
+    unsigned char *alpha = image.GetAlpha();
+
+    int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
+
+    for (int y = 0; y < height; y++, out += rowpad)
+    {
+        for (int x = 0; x < width; x++, alpha++, out += 4, in += 3)
+        {
+            out[0] = in[0];
+            out[1] = in[1];
+            out[2] = in[2];
+            out[3] = *alpha;
+        }
+    }
+
+    return true;
+}
+
+wxImage wxBitmap::ConvertToImage() const
+{
+    wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
+
+    const int w = GetWidth();
+    const int h = GetHeight();
+    wxImage image(w, h, false);
+    unsigned char *data = image.GetData();
+
+    wxCHECK_MSG(data != NULL, wxNullImage, wxT("couldn't create image") );
+
+    // prefer pixbuf if available, it will preserve alpha and should be quicker
+    if (HasPixbuf())
+    {
+        GdkPixbuf *pixbuf = GetPixbuf();
+        unsigned char* alpha = NULL;
+        if (gdk_pixbuf_get_has_alpha(pixbuf))
+        {
+            image.SetAlpha();
+            alpha = image.GetAlpha();
+        }
+        const unsigned char* in = gdk_pixbuf_get_pixels(pixbuf);
+        unsigned char *out = data;
+        const int inc = 3 + int(alpha != NULL);
+        const int rowpad = gdk_pixbuf_get_rowstride(pixbuf) - inc * w;
+
+        for (int y = 0; y < h; y++, in += rowpad)
+        {
+            for (int x = 0; x < w; x++, in += inc, out += 3)
+            {
+                out[0] = in[0];
+                out[1] = in[1];
+                out[2] = in[2];
+                if (alpha != NULL)
+                    *alpha++ = in[3];
+            }
+        }
+    }
+    else
+    {
+        GdkPixmap* pixmap = GetPixmap();
+        GdkPixmap* pixmap_invert = NULL;
+        if (GetDepth() == 1)
+        {
+            // mono bitmaps are inverted, i.e. 0 is white
+            pixmap_invert = gdk_pixmap_new(pixmap, w, h, 1);
+            GdkGC* gc = gdk_gc_new(pixmap_invert);
+            gdk_gc_set_function(gc, GDK_COPY_INVERT);
+            gdk_draw_drawable(pixmap_invert, gc, pixmap, 0, 0, 0, 0, w, h);
+            g_object_unref(gc);
+            pixmap = pixmap_invert;
+        }
+        // create a pixbuf which shares data with the wxImage
+        GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data(
+            data, GDK_COLORSPACE_RGB, false, 8, w, h, 3 * w, NULL, NULL);
+
+        gdk_pixbuf_get_from_drawable(pixbuf, pixmap, NULL, 0, 0, 0, 0, w, h);
+
+        g_object_unref(pixbuf);
+        if (pixmap_invert != NULL)
+            g_object_unref(pixmap_invert);
+    }
+    // convert mask, unless there is already alpha
+    if (GetMask() && !image.HasAlpha())
+    {
+        // we hard code the mask colour for now but we could also make an
+        // effort (and waste time) to choose a colour not present in the
+        // image already to avoid having to fudge the pixels below --
+        // whether it's worth to do it is unclear however
+        const int MASK_RED = 1;
+        const int MASK_GREEN = 2;
+        const int MASK_BLUE = 3;
+        const int MASK_BLUE_REPLACEMENT = 2;
+
+        image.SetMaskColour(MASK_RED, MASK_GREEN, MASK_BLUE);
+        GdkImage* image_mask = gdk_drawable_get_image(GetMask()->GetBitmap(), 0, 0, w, h);
+
+        for (int y = 0; y < h; y++)
+        {
+            for (int x = 0; x < w; x++, data += 3)
+            {
+                if (gdk_image_get_pixel(image_mask, x, y) == 0)
+                {
+                    data[0] = MASK_RED;
+                    data[1] = MASK_GREEN;
+                    data[2] = MASK_BLUE;
+                }
+                else if (data[0] == MASK_RED && data[1] == MASK_GREEN && data[2] == MASK_BLUE)
+                {
+                    // we have to fudge the colour a bit to prevent
+                    // this pixel from appearing transparent
+                    data[2] = MASK_BLUE_REPLACEMENT;
+                }
+            }
+        }
+        g_object_unref(image_mask);
+    }
+
+    return image;
+}
+
+#endif // wxUSE_IMAGE
+
+bool wxBitmap::IsOk() const
 {
-  if (*this == bmp) return (*this); 
-  Ref( bmp ); 
-  return *this; 
-};
-  
-bool wxBitmap::operator == ( const wxBitmap& bmp )
+    return (m_refData != NULL) &&
+           (
+              M_BMPDATA->m_pixbuf ||
+              M_BMPDATA->m_pixmap
+           );
+}
+
+int wxBitmap::GetHeight() const
 {
-  return m_refData == bmp.m_refData; 
-};
-  
-bool wxBitmap::operator != ( const wxBitmap& bmp )
+    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
+
+    return M_BMPDATA->m_height;
+}
+
+int wxBitmap::GetWidth() const
 {
-  return m_refData != bmp.m_refData; 
-};
-  
-bool wxBitmap::Ok(void) const
+    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
+
+    return M_BMPDATA->m_width;
+}
+
+int wxBitmap::GetDepth() const
 {
-  return m_refData != NULL;
-};
-  
-int wxBitmap::GetHeight(void) const
+    wxCHECK_MSG( Ok(), -1, wxT("invalid bitmap") );
+
+    return M_BMPDATA->m_bpp;
+}
+
+wxMask *wxBitmap::GetMask() const
 {
-  if (!Ok()) return 0;
-  return M_BMPDATA->m_height;
-};
+    wxCHECK_MSG( Ok(), (wxMask *) NULL, wxT("invalid bitmap") );
 
-int wxBitmap::GetWidth(void) const
+    return M_BMPDATA->m_mask;
+}
+
+void wxBitmap::SetMask( wxMask *mask )
 {
-  if (!Ok()) return 0;
-  return M_BMPDATA->m_width;
-};
+    wxCHECK_RET( Ok(), wxT("invalid bitmap") );
+
+    AllocExclusive();
+    delete M_BMPDATA->m_mask;
+    M_BMPDATA->m_mask = mask;
+}
 
-int wxBitmap::GetDepth(void) const
+bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 {
-  if (!Ok()) return 0;
-  return M_BMPDATA->m_bpp;
-};
+    *this = icon;
+    return Ok();
+}
 
-void wxBitmap::SetHeight( int height )
+wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
+{
+    wxBitmap ret;
+
+    wxCHECK_MSG(Ok(), ret, wxT("invalid bitmap"));
+    wxCHECK_MSG(rect.x >= 0 && rect.y >= 0 &&
+                rect.x + rect.width <= M_BMPDATA->m_width &&
+                rect.y + rect.height <= M_BMPDATA->m_height,
+                ret, wxT("invalid bitmap region"));
+
+    if (HasPixbuf() || M_BMPDATA->m_bpp == 32)
+    {
+        GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
+                                           gdk_pixbuf_get_has_alpha(GetPixbuf()),
+                                           8, rect.width, rect.height);
+        ret.SetPixbuf(pixbuf, M_BMPDATA->m_bpp);
+        gdk_pixbuf_copy_area(GetPixbuf(),
+                             rect.x, rect.y, rect.width, rect.height,
+                             pixbuf, 0, 0);
+    }
+    else
+    {
+        ret.Create(rect.width, rect.height, M_BMPDATA->m_bpp);
+        GdkGC *gc = gdk_gc_new( ret.GetPixmap() );
+        gdk_draw_drawable( ret.GetPixmap(), gc, GetPixmap(), rect.x, rect.y, 0, 0, rect.width, rect.height );
+        g_object_unref (gc);
+    }
+    // make mask, unless there is already alpha
+    if (GetMask() && !HasAlpha())
+    {
+        wxMask *mask = new wxMask;
+        mask->m_bitmap = gdk_pixmap_new( wxGetRootWindow()->window, rect.width, rect.height, 1 );
+
+        GdkGC *gc = gdk_gc_new( mask->m_bitmap );
+        gdk_draw_drawable(mask->m_bitmap, gc, M_BMPDATA->m_mask->m_bitmap, rect.x, rect.y, 0, 0, rect.width, rect.height);
+        g_object_unref (gc);
+
+        ret.SetMask( mask );
+    }
+
+    return ret;
+}
+
+bool wxBitmap::SaveFile( const wxString &name, wxBitmapType type, const wxPalette *WXUNUSED(palette) ) const
 {
-  if (!Ok()) return;
-  M_BMPDATA->m_height = height;
-};
+    wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 
-void wxBitmap::SetWidth( int width )
+#if wxUSE_IMAGE
+    // Try to save the bitmap via wxImage handlers:
+    wxImage image = ConvertToImage();
+    return image.Ok() && image.SaveFile(name, type);
+#else // !wxUSE_IMAGE
+    return false;
+#endif // wxUSE_IMAGE
+}
+
+bool wxBitmap::LoadFile( const wxString &name, wxBitmapType type )
 {
-  if (!Ok()) return;
-  M_BMPDATA->m_width = width;
-};
+    UnRef();
 
-void wxBitmap::SetDepth( int depth )
+    if (type == wxBITMAP_TYPE_XPM)
+    {
+        GdkBitmap *mask = (GdkBitmap*) NULL;
+        SetPixmap(gdk_pixmap_create_from_xpm(wxGetRootWindow()->window, &mask, NULL, name.fn_str()));
+
+        if (mask)
+        {
+            M_BMPDATA->m_mask = new wxMask;
+            M_BMPDATA->m_mask->m_bitmap = mask;
+        }
+    }
+#if wxUSE_IMAGE
+    else // try if wxImage can load it
+    {
+        wxImage image;
+        if (image.LoadFile(name, type) && image.Ok())
+            CreateFromImage(image, -1);
+    }
+#endif // wxUSE_IMAGE
+
+    return Ok();
+}
+
+#if wxUSE_PALETTE
+wxPalette *wxBitmap::GetPalette() const
 {
-  if (!Ok()) return;
-  M_BMPDATA->m_bpp = depth;
-};
+    wxCHECK_MSG(Ok(), NULL, wxT("invalid bitmap"));
 
-wxMask *wxBitmap::GetMask(void) const
+    return M_BMPDATA->m_palette;
+}
+
+void wxBitmap::SetPalette(const wxPalette& WXUNUSED(palette))
 {
-  if (!Ok()) return NULL;
-  
-  return M_BMPDATA->m_mask;
-};
+    // TODO
+}
+#endif // wxUSE_PALETTE
 
-void wxBitmap::SetMask( wxMask *mask )
+void wxBitmap::SetHeight( int height )
 {
-  if (!Ok()) return;
-  
-  if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
-  M_BMPDATA->m_mask = mask;
-};
+    AllocExclusive();
+    M_BMPDATA->m_height = height;
+}
 
-void wxBitmap::Resize( int height, int width )
-{
-  if (!Ok()) return;
-  
-  return;
-  
-#ifdef USE_GDK_IMLIB
-  
-  if (M_BMPDATA->m_bitmap) return;  // not supported for bitmaps
-  
-  if (!M_BMPDATA->m_image) RecreateImage();
-  
-  if (M_BMPDATA->m_pixmap) gdk_imlib_free_pixmap( M_BMPDATA->m_pixmap );
-  if (M_BMPDATA->m_mask) delete M_BMPDATA->m_mask;
-  
-  GdkImlibImage* image = gdk_imlib_clone_scaled_image( M_BMPDATA->m_image, height, width );
-  gdk_imlib_destroy_image( M_BMPDATA->m_image );
-  M_BMPDATA->m_image = image;
-  M_BMPDATA->m_height = height;
-  M_BMPDATA->m_width = width;
-  
-  Render();
-  
-#endif
-};
+void wxBitmap::SetWidth( int width )
+{
+    AllocExclusive();
+    M_BMPDATA->m_width = width;
+}
 
-bool wxBitmap::SaveFile( const wxString &name, int WXUNUSED(type), 
-  wxPalette *WXUNUSED(palette) )
+void wxBitmap::SetDepth( int depth )
 {
-#ifdef USE_GDK_IMLIB
+    AllocExclusive();
+    M_BMPDATA->m_bpp = depth;
+}
 
-  if (!Ok()) return FALSE;
-  
-  if (!M_BMPDATA->m_image) RecreateImage();
-  
-  return gdk_imlib_save_image( M_BMPDATA->m_image, WXSTRINGCAST name, NULL );
+void wxBitmap::SetPixmap( GdkPixmap *pixmap )
+{
+    if (!m_refData)
+        m_refData = new wxBitmapRefData;
 
-#endif
+    // AllocExclusive should not be needed for this internal function
+    wxASSERT(m_refData->GetRefCount() == 1);
+    wxASSERT(M_BMPDATA->m_pixmap == NULL);
+    M_BMPDATA->m_pixmap = pixmap;
+    gdk_drawable_get_size(pixmap, &M_BMPDATA->m_width, &M_BMPDATA->m_height);
+    M_BMPDATA->m_bpp = gdk_drawable_get_depth(pixmap);
+    PurgeOtherRepresentations(Pixmap);
+}
 
-  return FALSE;
-};
+GdkPixmap *wxBitmap::GetPixmap() const
+{
+    wxCHECK_MSG( Ok(), (GdkPixmap *) NULL, wxT("invalid bitmap") );
+
+    // create the pixmap on the fly if we use Pixbuf representation:
+    if (M_BMPDATA->m_pixmap == NULL)
+    {
+        GdkPixmap** pmask = NULL;
+        if (gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf))
+        {
+            // make new mask from alpha
+            delete M_BMPDATA->m_mask;
+            M_BMPDATA->m_mask = new wxMask;
+            pmask = &M_BMPDATA->m_mask->m_bitmap;
+        }
+        gdk_pixbuf_render_pixmap_and_mask(M_BMPDATA->m_pixbuf,
+                                          &M_BMPDATA->m_pixmap,
+                                          pmask,
+                                          0x80 /* alpha threshold */);
+    }
+
+    return M_BMPDATA->m_pixmap;
+}
 
-bool wxBitmap::LoadFile( const wxString &name, int WXUNUSED(type) )
+bool wxBitmap::HasPixmap() const
 {
-#ifdef USE_GDK_IMLIB
+    wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
 
-  UnRef();
-  m_refData = new wxBitmapRefData();
-  
-  M_BMPDATA->m_image = gdk_imlib_load_image( WXSTRINGCAST name );
+    return M_BMPDATA->m_pixmap != NULL;
+}
 
-  if (!M_BMPDATA->m_image)
-  {
-    UnRef();
-    return FALSE;
-  };
-
-  Render();
-				  
-  gdk_window_get_size( M_BMPDATA->m_pixmap, &(M_BMPDATA->m_width), &(M_BMPDATA->m_height) );
-  M_BMPDATA->m_bpp = 24; // ?
-  
-  return TRUE;
-#endif
+GdkPixbuf *wxBitmap::GetPixbuf() const
+{
+    wxCHECK_MSG( Ok(), NULL, wxT("invalid bitmap") );
+
+    if (M_BMPDATA->m_pixbuf == NULL)
+    {
+        int width = GetWidth();
+        int height = GetHeight();
+
+        GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
+                                           GetMask() != NULL,
+                                           8, width, height);
+        M_BMPDATA->m_pixbuf = pixbuf;
+        gdk_pixbuf_get_from_drawable(pixbuf, M_BMPDATA->m_pixmap, NULL,
+                                     0, 0, 0, 0, width, height);
+
+        // apply the mask to created pixbuf:
+        if (M_BMPDATA->m_pixbuf && M_BMPDATA->m_mask)
+        {
+            GdkPixbuf *pmask =
+                gdk_pixbuf_get_from_drawable(NULL,
+                                             M_BMPDATA->m_mask->GetBitmap(),
+                                             NULL,
+                                             0, 0, 0, 0, width, height);
+            if (pmask)
+            {
+                guchar *bmp = gdk_pixbuf_get_pixels(pixbuf);
+                guchar *mask = gdk_pixbuf_get_pixels(pmask);
+                int bmprowinc = gdk_pixbuf_get_rowstride(pixbuf) - 4 * width;
+                int maskrowinc = gdk_pixbuf_get_rowstride(pmask) - 3 * width;
+
+                for (int y = 0; y < height;
+                     y++, bmp += bmprowinc, mask += maskrowinc)
+                {
+                    for (int x = 0; x < width; x++, bmp += 4, mask += 3)
+                    {
+                        if (mask[0] == 0 /*black pixel*/)
+                            bmp[3] = 0;
+                    }
+                }
+
+                g_object_unref (pmask);
+            }
+        }
+    }
+
+    return M_BMPDATA->m_pixbuf;
+}
 
-  return FALSE;
-};
-        
-wxPalette *wxBitmap::GetPalette(void) const
+bool wxBitmap::HasPixbuf() const
 {
-  if (!Ok()) return NULL;
-  return M_BMPDATA->m_palette;
-};
+    wxCHECK_MSG( Ok(), false, wxT("invalid bitmap") );
+
+    return M_BMPDATA->m_pixbuf != NULL;
+}
+
+void wxBitmap::SetPixbuf(GdkPixbuf* pixbuf, int depth)
+{
+    if (!m_refData)
+        m_refData = new wxBitmapRefData;
+
+    // AllocExclusive should not be needed for this internal function
+    wxASSERT(m_refData->GetRefCount() == 1);
+    wxASSERT(M_BMPDATA->m_pixbuf == NULL);
+    M_BMPDATA->m_pixbuf = pixbuf;
+    M_BMPDATA->m_width = gdk_pixbuf_get_width(pixbuf);
+    M_BMPDATA->m_height = gdk_pixbuf_get_height(pixbuf);
+    // if depth specified
+    if (depth != 0)
+        M_BMPDATA->m_bpp = depth;
+    else if (M_BMPDATA->m_bpp == 0)
+        // use something reasonable
+        M_BMPDATA->m_bpp = wxTheApp->GetGdkVisual()->depth;
+    PurgeOtherRepresentations(Pixbuf);
+}
+
+void wxBitmap::PurgeOtherRepresentations(wxBitmap::Representation keep)
+{
+    if (keep == Pixmap && HasPixbuf())
+    {
+        g_object_unref (M_BMPDATA->m_pixbuf);
+        M_BMPDATA->m_pixbuf = NULL;
+    }
+    if (keep == Pixbuf && HasPixmap())
+    {
+        g_object_unref (M_BMPDATA->m_pixmap);
+        M_BMPDATA->m_pixmap = NULL;
+    }
+}
 
-GdkPixmap *wxBitmap::GetPixmap(void) const
+void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
+{
+    void* bits = NULL;
+    GdkPixbuf *pixbuf = GetPixbuf();
+    const bool hasAlpha = HasAlpha();
+    // allow access if bpp is valid and matches existence of alpha
+    if (pixbuf != NULL && (
+        bpp == 24 && !hasAlpha ||
+        bpp == 32 && hasAlpha))
+    {
+        data.m_height = gdk_pixbuf_get_height( pixbuf );
+        data.m_width = gdk_pixbuf_get_width( pixbuf );
+        data.m_stride = gdk_pixbuf_get_rowstride( pixbuf );
+        bits = gdk_pixbuf_get_pixels(pixbuf);
+    }
+    return bits;
+}
+
+void wxBitmap::UngetRawData(wxPixelDataBase& WXUNUSED(data))
 {
-  if (!Ok()) return NULL;
-  return M_BMPDATA->m_pixmap;
-};
-  
-GdkBitmap *wxBitmap::GetBitmap(void) const
+}
+
+bool wxBitmap::HasAlpha() const
 {
-  if (!Ok()) return NULL;
-  
-  return M_BMPDATA->m_bitmap;
-};
-  
-void wxBitmap::DestroyImage(void)
-{
-  if (!Ok()) return;
-  
-  if (M_BMPDATA->m_image)
-  {
-    gdk_imlib_destroy_image( M_BMPDATA->m_image );
-    M_BMPDATA->m_image = NULL;
-  };
-};
+    return m_refData != NULL && M_BMPDATA->m_pixbuf != NULL &&
+        gdk_pixbuf_get_has_alpha(M_BMPDATA->m_pixbuf);
+}
 
-void wxBitmap::RecreateImage(void)
+wxObjectRefData* wxBitmap::CreateRefData() const
 {
-};
+    return new wxBitmapRefData;
+}
 
-void wxBitmap::Render(void)
-{
-  if (!Ok()) return;
-  
-#ifdef USE_GDK_IMLIB
-
-  gdk_imlib_render( M_BMPDATA->m_image, M_BMPDATA->m_image->rgb_width, M_BMPDATA->m_image->rgb_height );
-  
-  M_BMPDATA->m_pixmap = gdk_imlib_move_image( M_BMPDATA->m_image );
-  GdkBitmap *mask = gdk_imlib_move_mask( M_BMPDATA->m_image );
-  if (mask)
-  {
-    M_BMPDATA->m_mask = new wxMask();
-    M_BMPDATA->m_mask->m_bitmap = mask;
-  };
-  
+wxObjectRefData* wxBitmap::CloneRefData(const wxObjectRefData* data) const
+{
+    const wxBitmapRefData* oldRef = wx_static_cast(const wxBitmapRefData*, data);
+    wxBitmapRefData* newRef = new wxBitmapRefData;
+    newRef->m_width = oldRef->m_width;
+    newRef->m_height = oldRef->m_height;
+    newRef->m_bpp = oldRef->m_bpp;
+    if (oldRef->m_pixmap != NULL)
+    {
+        newRef->m_pixmap = gdk_pixmap_new(
+            oldRef->m_pixmap, oldRef->m_width, oldRef->m_height,
+            // use pixmap depth, m_bpp may not match
+            gdk_drawable_get_depth(oldRef->m_pixmap));
+        GdkGC* gc = gdk_gc_new(newRef->m_pixmap);
+        gdk_draw_drawable(
+            newRef->m_pixmap, gc, oldRef->m_pixmap, 0, 0, 0, 0, -1, -1);
+        g_object_unref(gc);
+    }
+    if (oldRef->m_pixbuf != NULL)
+    {
+        newRef->m_pixbuf = gdk_pixbuf_copy(oldRef->m_pixbuf);
+    }
+    if (oldRef->m_mask != NULL)
+    {
+        newRef->m_mask = new wxMask;
+        newRef->m_mask->m_bitmap = gdk_pixmap_new(
+            oldRef->m_mask->m_bitmap, oldRef->m_width, oldRef->m_height, 1);
+        GdkGC* gc = gdk_gc_new(newRef->m_mask->m_bitmap);
+        gdk_draw_drawable(newRef->m_mask->m_bitmap,
+            gc, oldRef->m_mask->m_bitmap, 0, 0, 0, 0, -1, -1);
+        g_object_unref(gc);
+    }
+#if wxUSE_PALETTE
+    // implement this if SetPalette is ever implemented
+    wxASSERT(oldRef->m_palette == NULL);
 #endif
-};
 
+    return newRef;
+}
+
+//-----------------------------------------------------------------------------
+// wxBitmapHandler
+//-----------------------------------------------------------------------------
+
+IMPLEMENT_ABSTRACT_CLASS(wxBitmapHandler, wxBitmapHandlerBase)
 
+/* static */ void wxBitmap::InitStandardHandlers()
+{
+    // TODO: Insert handler based on GdkPixbufs handler later
+}