X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/7ff64980aaae854d35260b57449dd46fb2f70954..f3ebbc0ac81967b5ef42414ffd753905075940dd:/src/msw/bitmap.cpp

diff --git a/src/msw/bitmap.cpp b/src/msw/bitmap.cpp
index 5fbb33b963..fb6d081fb6 100644
--- a/src/msw/bitmap.cpp
+++ b/src/msw/bitmap.cpp
@@ -17,10 +17,6 @@
 // headers
 // ----------------------------------------------------------------------------
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-    #pragma implementation "bitmap.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
@@ -200,7 +196,7 @@ wxBitmapRefData::wxBitmapRefData()
 #endif
 
     m_isDIB =
-    m_hasAlpha = FALSE;
+    m_hasAlpha = false;
 }
 
 wxBitmapRefData::wxBitmapRefData(const wxBitmapRefData& data)
@@ -215,7 +211,7 @@ wxBitmapRefData::wxBitmapRefData(const wxBitmapRefData& data)
 
     wxASSERT_MSG( !data.m_isDIB,
                     _T("can't copy bitmap locked for raw access!") );
-    m_isDIB = FALSE;
+    m_isDIB = false;
 
     m_hasAlpha = data.m_hasAlpha;
 }
@@ -264,7 +260,6 @@ wxObjectRefData *wxBitmap::CloneRefData(const wxObjectRefData *dataOrig) const
         return NULL;
 
     wxBitmap *self = wx_const_cast(wxBitmap *, this);
-    self->m_refData = new wxBitmapRefData(*data);
 
 #if wxUSE_WXDIB
     // copy the other bitmap
@@ -273,7 +268,12 @@ wxObjectRefData *wxBitmap::CloneRefData(const wxObjectRefData *dataOrig) const
         wxDIB dib((HBITMAP)(data->m_hBitmap));
         self->CopyFromDIB(dib);
     }
+    else
 #endif // wxUSE_WXDIB
+    {
+        // don't copy the bitmap data, but do copy the size, depth, ...
+        self->m_refData = new wxBitmapRefData(*data);
+    }
 
     return m_refData;
 }
@@ -306,10 +306,37 @@ bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
 
     refData->m_hBitmap = (WXHBITMAP)iconInfo.hbmColor;
 
-    // the mask returned by GetIconInfo() is inversed compared to the usual
-    // wxWin convention
-    refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h));
-
+#if wxUSE_WXDIB
+    // If the icon is 32 bits per pixel then it may have alpha channel data,
+    // although there are some icons that are 32 bpp but have no alpha... So
+    // convert to a DIB and manually check the 4th byte for each pixel.
+    BITMAP bm;
+    if ( ::GetObject(iconInfo.hbmColor, sizeof(BITMAP), (LPVOID)&bm)
+         && bm.bmBitsPixel == 32)
+    {
+        wxDIB dib(iconInfo.hbmColor);
+        if (dib.IsOk())
+        {
+            unsigned char* pixels = dib.GetData();
+            for (int idx=0; idx<w*h*4; idx+=4)
+            {
+                if (pixels[idx+3] != 0)
+                {
+                    // If there is an alpha byte that is non-zero then set the
+                    // alpha flag and bail out of the loop.
+                    refData->m_hasAlpha = true;
+                    break;
+                }
+            }
+        }
+    }
+#endif
+    if ( !refData->m_hasAlpha )
+    {
+        // the mask returned by GetIconInfo() is inverted compared to the usual
+        // wxWin convention
+        refData->SetMask(wxInvertMask(iconInfo.hbmMask, w, h));
+    }
 
     // delete the old one now as we don't need it any more
     ::DeleteObject(iconInfo.hbmMask);
@@ -328,7 +355,7 @@ bool wxBitmap::CopyFromCursor(const wxCursor& cursor)
     UnRef();
 
     if ( !cursor.Ok() )
-        return FALSE;
+        return false;
 
     return CopyFromIconOrCursor(cursor);
 }
@@ -338,7 +365,7 @@ bool wxBitmap::CopyFromIcon(const wxIcon& icon)
     UnRef();
 
     if ( !icon.Ok() )
-        return FALSE;
+        return false;
 
     return CopyFromIconOrCursor(icon);
 }
@@ -347,12 +374,12 @@ bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 
 bool wxBitmap::CopyFromDIB(const wxDIB& dib)
 {
-    wxCHECK_MSG( dib.IsOk(), FALSE, _T("invalid DIB in CopyFromDIB") );
+    wxCHECK_MSG( dib.IsOk(), false, _T("invalid DIB in CopyFromDIB") );
 
 #ifdef SOMETIMES_USE_DIB
     HBITMAP hbitmap = dib.CreateDDB();
     if ( !hbitmap )
-        return FALSE;
+        return false;
 #else // ALWAYS_USE_DIB
     HBITMAP hbitmap = ((wxDIB &)dib).Detach();  // const_cast
 #endif // SOMETIMES_USE_DIB/ALWAYS_USE_DIB
@@ -378,7 +405,7 @@ bool wxBitmap::CopyFromDIB(const wxDIB& dib)
     delete palette;
 #endif // wxUSE_PALETTE
 
-    return TRUE;
+    return true;
 }
 
 #endif // NEVER_USE_DIB
@@ -404,7 +431,7 @@ wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
     {
         // we assume that it is in XBM format which is not quite the same as
         // the format CreateBitmap() wants because the order of bytes in the
-        // line is inversed!
+        // line is reversed!
         const size_t bytesPerLine = (width + 7) / 8;
         const size_t padding = bytesPerLine % 2;
         const size_t len = height * ( padding + bytesPerLine );
@@ -422,7 +449,7 @@ wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
                 for ( int bits = 0; bits < 8; bits++)
                 {
                     reversed <<= 1;
-                    reversed |= (val & 0x01);
+                    reversed |= (unsigned char)(val & 0x01);
                     val >>= 1;
                 }
                 *dst++ = reversed;
@@ -454,25 +481,22 @@ wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 }
 
 // Create from XPM data
-#if wxUSE_IMAGE && wxUSE_XPM
 bool wxBitmap::CreateFromXpm(const char **data)
-#else
-bool wxBitmap::CreateFromXpm(const char **WXUNUSED(data))
-#endif
 {
 #if wxUSE_IMAGE && wxUSE_XPM
     Init();
 
-    wxCHECK_MSG( data != NULL, FALSE, wxT("invalid bitmap data") )
+    wxCHECK_MSG( data != NULL, false, wxT("invalid bitmap data") )
 
     wxXPMDecoder decoder;
     wxImage img = decoder.ReadData(data);
-    wxCHECK_MSG( img.Ok(), FALSE, wxT("invalid bitmap data") )
+    wxCHECK_MSG( img.Ok(), false, wxT("invalid bitmap data") )
 
     *this = wxBitmap(img);
-    return TRUE;
+    return true;
 #else
-    return FALSE;
+    wxUnusedVar(data);
+    return false;
 #endif
 }
 
@@ -511,7 +535,7 @@ bool wxBitmap::Create(int width, int height, int depth)
 
 bool wxBitmap::Create(int width, int height, const wxDC& dc)
 {
-    wxCHECK_MSG( dc.Ok(), FALSE, _T("invalid HDC in wxBitmap::Create()") );
+    wxCHECK_MSG( dc.Ok(), false, _T("invalid HDC in wxBitmap::Create()") );
 
     return DoCreate(width, height, -1, dc.GetHDC());
 }
@@ -538,12 +562,12 @@ bool wxBitmap::DoCreate(int w, int h, int d, WXHDC hdc)
 
         wxDIB dib(w, h, d);
         if ( !dib.IsOk() )
-           return FALSE;
+           return false;
 
         // don't delete the DIB section in dib object dtor
         hbmp = dib.Detach();
 
-        GetBitmapData()->m_isDIB = TRUE;
+        GetBitmapData()->m_isDIB = true;
         GetBitmapData()->m_depth = d;
     }
     else // create a DDB
@@ -618,7 +642,7 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc)
     if (hBitmap == NULL)
     {
         ::ReleaseDC(NULL, hScreenDC);
-        return FALSE;
+        return false;
     }
     HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
 
@@ -644,7 +668,7 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc)
 
         if (!hMaskBitmap)
         {
-            hasMask = FALSE;
+            hasMask = false;
         }
         else
         {
@@ -655,7 +679,7 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc)
             hOldMaskBitmap = ::SelectObject( hMaskDC, hMaskBitmap);
         }
 #else
-        hasMask = FALSE;
+        hasMask = false;
 #endif
     }
 
@@ -702,7 +726,7 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth, const wxDC& dc)
     SetPalette(image.GetPalette());
 #endif // wxUSE_PALETTE
 
-    return TRUE;
+    return true;
 }
 
 wxImage wxBitmap::ConvertToImage() const
@@ -783,7 +807,7 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth)
 
 bool wxBitmap::CreateFromImage(const wxImage& image, const wxDC& dc)
 {
-    wxCHECK_MSG( dc.Ok(), FALSE,
+    wxCHECK_MSG( dc.Ok(), false,
                     _T("invalid HDC in wxBitmap::CreateFromImage()") );
 
     return CreateFromImage(image, -1, dc.GetHDC());
@@ -791,7 +815,7 @@ bool wxBitmap::CreateFromImage(const wxImage& image, const wxDC& dc)
 
 bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc)
 {
-    wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") );
+    wxCHECK_MSG( image.Ok(), false, wxT("invalid image") );
 
     UnRef();
 
@@ -801,8 +825,9 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc)
 
     wxDIB dib(image);
     if ( !dib.IsOk() )
-        return FALSE;
-
+        return false;
+	if (depth == -1)
+		depth = dib.GetDepth();	// Get depth from image if none specified
 
     // store the bitmap parameters
     wxBitmapRefData *refData = new wxBitmapRefData;
@@ -824,15 +849,15 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc)
         // don't delete the DIB section in dib object dtor
         hbitmap = dib.Detach();
 
-        refData->m_isDIB = TRUE;
-        refData->m_depth = dib.GetDepth();
+        refData->m_isDIB = true;
+        refData->m_depth = depth;
     }
 #ifndef ALWAYS_USE_DIB
     else // we need to convert DIB to DDB
     {
         hbitmap = dib.CreateDDB((HDC)hdc);
 
-        refData->m_depth = depth == -1 ? dib.GetDepth() : depth;
+        refData->m_depth = depth;
     }
 #endif // !ALWAYS_USE_DIB
 
@@ -842,12 +867,45 @@ bool wxBitmap::CreateFromImage(const wxImage& image, int depth, WXHDC hdc)
     // finally also set the mask if we have one
     if ( image.HasMask() )
     {
-        SetMask(new wxMask(*this, wxColour(image.GetMaskRed(),
-                                           image.GetMaskGreen(),
-                                           image.GetMaskBlue())));
+        const size_t len  = 2*((w+15)/16);
+        BYTE *src  = image.GetData();
+        BYTE *data = new BYTE[h*len];
+        memset(data, 0, h*len);
+        BYTE r = image.GetMaskRed(),
+             g = image.GetMaskGreen(),
+             b = image.GetMaskBlue();
+        BYTE *dst = data;
+        for ( int y = 0; y < h; y++, dst += len )
+        {
+            BYTE *dstLine = dst;
+            BYTE mask = 0x80;
+            for ( int x = 0; x < w; x++, src += 3 )
+            {
+                if (src[0] != r || src[1] != g || src[2] != b)
+                    *dstLine |= mask;
+
+                if ( (mask >>= 1) == 0 )
+                {
+                    dstLine++;
+                    mask = 0x80;
+                }
+            }
+        }
+
+        hbitmap = ::CreateBitmap(w, h, 1, 1, data);
+        if ( !hbitmap )
+        {
+            wxLogLastError(_T("CreateBitmap(mask)"));
+        }
+        else
+        {
+            SetMask(new wxMask((WXHBITMAP)hbitmap));
+        }
+
+        delete[] data;
     }
 
-    return TRUE;
+    return true;
 }
 
 wxImage wxBitmap::ConvertToImage() const
@@ -961,12 +1019,12 @@ bool wxBitmap::LoadFile(const wxString& filename, long type)
         {
             *this = wxBitmap(image);
 
-            return TRUE;
+            return true;
         }
     }
 #endif // wxUSE_IMAGE
 
-    return FALSE;
+    return false;
 }
 
 bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
@@ -979,7 +1037,7 @@ bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
     {
         wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %ld defined."), type);
 
-        return FALSE;
+        return false;
     }
 
     m_refData = new wxBitmapRefData;
@@ -1009,7 +1067,7 @@ bool wxBitmap::SaveFile(const wxString& filename,
     }
 #endif // wxUSE_IMAGE
 
-    return FALSE;
+    return false;
 }
 
 // ----------------------------------------------------------------------------
@@ -1024,11 +1082,13 @@ wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
                  (rect.y+rect.height <= GetHeight()),
                  wxNullBitmap, wxT("Invalid bitmap or bitmap region") );
 
-    wxBitmap ret( rect.width, rect.height );
+    wxBitmap ret( rect.width, rect.height, GetDepth() );
     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 
 #ifndef __WXMICROWIN__
-    // TODO: copy alpha channel data if any
+    // handle alpha channel, if any
+    if (HasAlpha())
+        ret.UseAlpha();
 
     // copy bitmap data
     MemoryHDC dcSrc,
@@ -1089,6 +1149,15 @@ wxMask *wxBitmap::GetMask() const
     return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL;
 }
 
+wxBitmap wxBitmap::GetMaskBitmap() const
+{
+    wxBitmap bmp;
+    wxMask *mask = GetMask();
+    if ( mask )
+        bmp.SetHBITMAP(mask->GetMaskBitmap());
+    return bmp;
+}
+
 #ifdef __WXDEBUG__
 
 wxDC *wxBitmap::GetSelectedInto() const
@@ -1178,7 +1247,7 @@ void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
     HBITMAP hDIB;
     if ( !GetBitmapData()->m_isDIB )
     {
-        wxCHECK_MSG( !GetBitmapData()->m_dib, FALSE,
+        wxCHECK_MSG( !GetBitmapData()->m_dib, NULL,
                         _T("GetRawData() may be called only once") );
 
         wxDIB *dib = new wxDIB(*this);
@@ -1222,7 +1291,11 @@ void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
     data.m_height = h;
 
     // remember that DIBs are stored in top to bottom order!
-    const LONG bytesPerRow = ds.dsBm.bmWidthBytes;
+    // (We can't just use ds.dsBm.bmWidthBytes here, because it isn't always a
+    // multiple of 2, as required by the documentation.  So we use the official
+    // formula, which we already use elsewhere.)
+    const LONG bytesPerRow =
+        wxDIB::GetLineSize(ds.dsBm.bmWidth, ds.dsBm.bmBitsPixel);
     data.m_stride = -bytesPerRow;
 
     char *bits = (char *)ds.dsBm.bmBits;
@@ -1243,12 +1316,7 @@ void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
     if ( !Ok() )
         return;
 
-    // the cast is ugly but we can't do without it and without making this
-    // function template (and hence inline) unfortunately
-    typedef wxPixelData<wxBitmap, wxAlphaPixelFormat> PixelData;
-    PixelData& data = (PixelData &)dataBase;
-
-    if ( !data )
+    if ( !&dataBase )
     {
         // invalid data, don't crash -- but don't assert neither as we're
         // called automatically from wxPixelDataBase dtor and so there is no
@@ -1256,36 +1324,6 @@ void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
         return;
     }
 
-    if ( GetBitmapData()->m_hasAlpha )
-    {
-        // AlphaBlend() wants to have premultiplied source alpha but
-        // wxRawBitmap API uses normal, not premultiplied, colours, so adjust
-        // them here now
-        PixelData::Iterator p(data);
-
-        const int w = data.GetWidth();
-        const int h = data.GetHeight();
-
-        for ( int y = 0; y < h; y++ )
-        {
-            PixelData::Iterator rowStart = p;
-
-            for ( int x = 0; x < w; x++ )
-            {
-                const unsigned alpha = p.Alpha();
-
-                p.Red() = (p.Red() * alpha + 127) / 255;
-                p.Blue() = (p.Blue() * alpha + 127) / 255;
-                p.Green() = (p.Green() * alpha + 127) / 255;
-
-                ++p;
-            }
-
-            p = rowStart;
-            p.OffsetY(data, 1);
-        }
-    }
-
     // if we're a DDB we need to convert DIB back to DDB now to make the
     // changes made via raw bitmap access effective
     if ( !GetBitmapData()->m_isDIB )
@@ -1343,7 +1381,7 @@ wxMask::~wxMask()
 bool wxMask::Create(const wxBitmap& bitmap)
 {
 #ifndef __WXMICROWIN__
-    wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, FALSE,
+    wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, false,
                  _T("can't create mask from invalid or not monochrome bitmap") );
 
     if ( m_maskBitmap )
@@ -1366,9 +1404,10 @@ bool wxMask::Create(const wxBitmap& bitmap)
     DeleteDC(srcDC);
     SelectObject(destDC, 0);
     DeleteDC(destDC);
-    return TRUE;
+    return true;
 #else
-    return FALSE;
+    wxUnusedVar(bitmap);
+    return false;
 #endif
 }
 
@@ -1394,7 +1433,7 @@ bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
     }
 #endif // wxUSE_PALETTE
 
-    return FALSE;
+    return false;
 }
 
 // Create a mask from a bitmap and a colour indicating
@@ -1402,7 +1441,7 @@ bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
 {
 #ifndef __WXMICROWIN__
-    wxCHECK_MSG( bitmap.Ok(), FALSE, _T("invalid bitmap in wxMask::Create") );
+    wxCHECK_MSG( bitmap.Ok(), false, _T("invalid bitmap in wxMask::Create") );
 
     if ( m_maskBitmap )
     {
@@ -1425,7 +1464,7 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
         wxLogLastError(wxT("CreateCompatibleDC"));
     }
 
-    bool ok = TRUE;
+    bool ok = true;
 
     // SelectObject() will fail
     wxASSERT_MSG( !bitmap.GetSelectedInto(),
@@ -1436,7 +1475,7 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
     {
         wxLogLastError(wxT("SelectObject"));
 
-        ok = FALSE;
+        ok = false;
     }
 
     HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
@@ -1444,7 +1483,7 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
     {
         wxLogLastError(wxT("SelectObject"));
 
-        ok = FALSE;
+        ok = false;
     }
 
     if ( ok )
@@ -1463,7 +1502,9 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
 
     return ok;
 #else // __WXMICROWIN__
-    return FALSE;
+    wxUnusedVar(bitmap);
+    wxUnusedVar(colour);
+    return false;
 #endif // __WXMICROWIN__/!__WXMICROWIN__
 }
 
@@ -1478,7 +1519,7 @@ bool wxBitmapHandler::Create(wxGDIImage *image,
 {
     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
 
-    return bitmap ? Create(bitmap, data, flags, width, height, depth) : FALSE;
+    return bitmap ? Create(bitmap, data, flags, width, height, depth) : false;
 }
 
 bool wxBitmapHandler::Load(wxGDIImage *image,
@@ -1488,7 +1529,7 @@ bool wxBitmapHandler::Load(wxGDIImage *image,
 {
     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
 
-    return bitmap ? LoadFile(bitmap, name, flags, width, height) : FALSE;
+    return bitmap ? LoadFile(bitmap, name, flags, width, height) : false;
 }
 
 bool wxBitmapHandler::Save(wxGDIImage *image,
@@ -1497,7 +1538,7 @@ bool wxBitmapHandler::Save(wxGDIImage *image,
 {
     wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
 
-    return bitmap ? SaveFile(bitmap, name, type) : FALSE;
+    return bitmap ? SaveFile(bitmap, name, type) : false;
 }
 
 bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
@@ -1507,7 +1548,7 @@ bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
                              int WXUNUSED(height),
                              int WXUNUSED(depth))
 {
-    return FALSE;
+    return false;
 }
 
 bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
@@ -1516,7 +1557,7 @@ bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
                                int WXUNUSED(desiredWidth),
                                int WXUNUSED(desiredHeight))
 {
-    return FALSE;
+    return false;
 }
 
 bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
@@ -1524,7 +1565,7 @@ bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
                                int WXUNUSED(type),
                                const wxPalette *WXUNUSED(palette))
 {
-    return FALSE;
+    return false;
 }
 
 // ----------------------------------------------------------------------------
@@ -1555,7 +1596,7 @@ bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
    // this value must be 1, 4, 8 or 24 so PixelDepth can only be
    lpDIBheader->bmiHeader.biBitCount = (WORD)(bitsPerPixel);
    lpDIBheader->bmiHeader.biCompression = BI_RGB;
-   lpDIBheader->bmiHeader.biSizeImage = xSize * abs(ySize) * bitsPerPixel >> 3;
+   lpDIBheader->bmiHeader.biSizeImage = (xSize * abs(ySize) * bitsPerPixel) >> 3;
    lpDIBheader->bmiHeader.biClrUsed = 256;
 
 
@@ -1569,7 +1610,7 @@ bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
 
    *lpDIBHeader = lpDIBheader;
 
-   return TRUE;
+   return true;
 }
 
 void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
@@ -1595,7 +1636,23 @@ HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
         return 0;
     }
 
-    wxMask *mask = bmp.GetMask();
+    wxMask* mask;
+    wxBitmap newbmp;
+    if ( bmp.HasAlpha() )
+    {
+        // Convert alpha to a mask.  NOTE: It would be better to actually put
+        // the alpha into the icon instead of making a mask, but I don't have
+        // time to figure that out today.
+        wxImage img = bmp.ConvertToImage();
+        img.ConvertAlphaToMask();
+        newbmp = wxBitmap(img);
+        mask = newbmp.GetMask();
+    }
+    else
+    {
+        mask = bmp.GetMask();
+    }
+
     if ( !mask )
     {
         // we must have a mask for an icon, so even if it's probably incorrect,
@@ -1632,7 +1689,7 @@ HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
 
     HICON hicon = ::CreateIconIndirect(&iconInfo);
 
-    if ( !bmp.GetMask() )
+    if ( !bmp.GetMask() && !bmp.HasAlpha() )
     {
         // we created the mask, now delete it
         delete mask;
@@ -1646,12 +1703,12 @@ HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
 
 HICON wxBitmapToHICON(const wxBitmap& bmp)
 {
-    return wxBitmapToIconOrCursor(bmp, TRUE, 0, 0);
+    return wxBitmapToIconOrCursor(bmp, true, 0, 0);
 }
 
 HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY)
 {
-    return (HCURSOR)wxBitmapToIconOrCursor(bmp, FALSE, hotSpotX, hotSpotY);
+    return (HCURSOR)wxBitmapToIconOrCursor(bmp, false, hotSpotX, hotSpotY);
 }
 
 HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
@@ -1693,7 +1750,7 @@ HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
     // Deselect objects
     SelectObject(hdcSrc,srcTmp);
     SelectObject(hdcDst,dstTmp);
-    
+
     ::DeleteDC(hdcSrc);
     ::DeleteDC(hdcDst);