X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1e6feb95a79834836e88143b15d9f424ebe79621..19e30148e18cc99296b26503c155e5cef59045f4:/src/msw/bitmap.cpp

diff --git a/src/msw/bitmap.cpp b/src/msw/bitmap.cpp
index 437a6c4452..3d725cfea2 100644
--- a/src/msw/bitmap.cpp
+++ b/src/msw/bitmap.cpp
@@ -40,10 +40,15 @@
     #include "wx/icon.h"
 #endif
 
+//#include "device.h"
+
 #include "wx/msw/private.h"
 #include "wx/log.h"
 
+#if !defined(__WXMICROWIN__)
 #include "wx/msw/dib.h"
+#endif
+
 #include "wx/image.h"
 #include "wx/xpmdecod.h"
 
@@ -85,10 +90,13 @@ void wxBitmapRefData::Free()
 
     if ( m_hBitmap)
     {
+        //        printf("About to delete bitmap %d\n", (int) (HBITMAP) m_hBitmap);
+#if 1
         if ( !::DeleteObject((HBITMAP)m_hBitmap) )
         {
             wxLogLastError(wxT("DeleteObject(hbitmap)"));
         }
+#endif
     }
 
     delete m_bitmapMask;
@@ -104,14 +112,13 @@ void wxBitmap::Init()
 {
     // m_refData = NULL; done in the base class ctor
 
-    if ( wxTheBitmapList )
-        wxTheBitmapList->AddBitmap(this);
 }
 
 #ifdef __WIN32__
 
 bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
 {
+#ifndef __WXMICROWIN__
     // it may be either HICON or HCURSOR
     HICON hicon = (HICON)icon.GetHandle();
 
@@ -140,11 +147,18 @@ bool wxBitmap::CopyFromIconOrCursor(const wxGDIImage& icon)
     refData->m_bitmapMask = new wxMask((WXHBITMAP)
                                         wxInvertMask(iconInfo.hbmMask, w, h));
 
+
+    // delete the old one now as we don't need it any more
+    ::DeleteObject(iconInfo.hbmMask);
+
 #if WXWIN_COMPATIBILITY_2
     refData->m_ok = TRUE;
 #endif // WXWIN_COMPATIBILITY_2
 
     return TRUE;
+#else
+    return FALSE;
+#endif
 }
 
 #endif // Win32
@@ -211,14 +225,13 @@ bool wxBitmap::CopyFromIcon(const wxIcon& icon)
 
 wxBitmap::~wxBitmap()
 {
-    if (wxTheBitmapList)
-        wxTheBitmapList->DeleteObject(this);
 }
 
 wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
 {
     Init();
 
+#ifndef __WXMICROWIN__
     wxBitmapRefData *refData = new wxBitmapRefData;
     m_refData = refData;
 
@@ -234,9 +247,9 @@ 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!
-        static const size_t bytesPerLine = (width + 7) / 8;
-        static const size_t padding = bytesPerLine % 2;
-        static const size_t len = height * ( padding + bytesPerLine );
+        const size_t bytesPerLine = (width + 7) / 8;
+        const size_t padding = bytesPerLine % 2;
+        const size_t len = height * ( padding + bytesPerLine );
         data = (char *)malloc(len);
         const char *src = bits;
         char *dst = data;
@@ -279,6 +292,7 @@ wxBitmap::wxBitmap(const char bits[], int width, int height, int depth)
     }
 
     SetHBITMAP((WXHBITMAP)hbmp);
+#endif
 }
 
 // Create from XPM data
@@ -288,15 +302,15 @@ bool wxBitmap::CreateFromXpm(const char **data)
     Init();
 
     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") )
-    
+
     *this = wxBitmap(img);
     return TRUE;
 #else
-	return FALSE;
+    return FALSE;
 #endif
 }
 
@@ -332,7 +346,7 @@ bool wxBitmap::Create(int w, int h, int d)
     GetBitmapData()->m_depth = d;
 
     HBITMAP hbmp;
-
+#ifndef __WXMICROWIN__
     if ( d > 0 )
     {
         hbmp = ::CreateBitmap(w, h, 1, d, NULL);
@@ -342,6 +356,7 @@ bool wxBitmap::Create(int w, int h, int d)
         }
     }
     else
+#endif
     {
         ScreenHDC dc;
         hbmp = ::CreateCompatibleBitmap(dc, w, h);
@@ -358,7 +373,6 @@ bool wxBitmap::Create(int w, int h, int d)
 #if WXWIN_COMPATIBILITY_2
     GetBitmapData()->m_ok = hbmp != 0;
 #endif // WXWIN_COMPATIBILITY_2
-
     return Ok();
 }
 
@@ -370,6 +384,126 @@ bool wxBitmap::Create(int w, int h, int d)
 
 bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
 {
+#ifdef __WXMICROWIN__
+
+  // Set this to 1 to experiment with mask code,
+  // which currently doesn't work
+#define USE_MASKS 0
+
+    m_refData = new wxBitmapRefData();
+
+    // Initial attempt at a simple-minded implementation.
+    // The bitmap will always be created at the screen depth,
+    // so the 'depth' argument is ignored.
+
+    HDC hScreenDC = ::GetDC(NULL);
+    //    printf("Screen planes = %d, bpp = %d\n", hScreenDC->psd->planes, hScreenDC->psd->bpp);
+    int screenDepth = ::GetDeviceCaps(hScreenDC, BITSPIXEL);
+
+    HBITMAP hBitmap = ::CreateCompatibleBitmap(hScreenDC, image.GetWidth(), image.GetHeight());
+    HBITMAP hMaskBitmap = NULL;
+    HBITMAP hOldMaskBitmap = NULL;
+    HDC hMaskDC = NULL;
+    unsigned char maskR = 0;
+    unsigned char maskG = 0;
+    unsigned char maskB = 0;
+
+    //    printf("Created bitmap %d\n", (int) hBitmap);
+    if (hBitmap == NULL)
+    {
+        ::ReleaseDC(NULL, hScreenDC);
+        return FALSE;
+    }
+    HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
+
+    HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap);
+    ::ReleaseDC(NULL, hScreenDC);
+
+    // created an mono-bitmap for the possible mask
+    bool hasMask = image.HasMask();
+
+    if ( hasMask )
+    {
+#if USE_MASKS
+        // FIXME: we should be able to pass bpp = 1, but
+        // GdBlit can't handle a different depth
+#if 0
+        hMaskBitmap = ::CreateBitmap( (WORD)image.GetWidth(), (WORD)image.GetHeight(), 1, 1, NULL );
+#else
+        hMaskBitmap = ::CreateCompatibleBitmap( hMemDC, (WORD)image.GetWidth(), (WORD)image.GetHeight());
+#endif
+        maskR = image.GetMaskRed();
+        maskG = image.GetMaskGreen();
+        maskB = image.GetMaskBlue();
+
+        if (!hMaskBitmap)
+        {
+            hasMask = FALSE;
+        }
+        else
+        {
+            hScreenDC = ::GetDC(NULL);
+            hMaskDC = ::CreateCompatibleDC(hScreenDC);
+           ::ReleaseDC(NULL, hScreenDC);
+
+            hOldMaskBitmap = ::SelectObject( hMaskDC, hMaskBitmap);
+        }
+#else
+        hasMask = FALSE;
+#endif
+    }
+
+    int i, j;
+    for (i = 0; i < image.GetWidth(); i++)
+    {
+        for (j = 0; j < image.GetHeight(); j++)
+        {
+            unsigned char red = image.GetRed(i, j);
+            unsigned char green = image.GetGreen(i, j);
+            unsigned char blue = image.GetBlue(i, j);
+
+            ::SetPixel(hMemDC, i, j, PALETTERGB(red, green, blue));
+
+            if (hasMask)
+            {
+                // scan the bitmap for the transparent colour and set the corresponding
+                // pixels in the mask to BLACK and the rest to WHITE
+                if (maskR == red && maskG == green && maskB == blue)
+                    ::SetPixel(hMaskDC, i, j, PALETTERGB(0, 0, 0));
+                else
+                    ::SetPixel(hMaskDC, i, j, PALETTERGB(255, 255, 255));
+            }
+        }
+    }
+
+    ::SelectObject(hMemDC, hOldBitmap);
+    ::DeleteDC(hMemDC);
+    if (hasMask)
+    {
+        ::SelectObject(hMaskDC, hOldMaskBitmap);
+        ::DeleteDC(hMaskDC);
+
+        ((wxBitmapRefData*)m_refData)->m_bitmapMask = new wxMask((WXHBITMAP) hMaskBitmap);
+    }
+
+    SetWidth(image.GetWidth());
+    SetHeight(image.GetHeight());
+    SetDepth(screenDepth);
+    SetHBITMAP( (WXHBITMAP) hBitmap );
+
+#if wxUSE_PALETTE
+    // Copy the palette from the source image
+    SetPalette(image.GetPalette());
+#endif // wxUSE_PALETTE
+
+#if WXWIN_COMPATIBILITY_2
+    // check the wxBitmap object
+    GetBitmapData()->SetOk();
+#endif // WXWIN_COMPATIBILITY_2
+
+    return TRUE;
+
+#else
     wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
 
     m_refData = new wxBitmapRefData();
@@ -415,6 +549,11 @@ bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
     if (depth == -1) depth = wxDisplayDepth();
     SetDepth( depth );
 
+#if wxUSE_PALETTE
+    // Copy the palette from the source image
+    SetPalette(image.GetPalette());
+#endif // wxUSE_PALETTE
+
     // create a DIB header
     int headersize = sizeof(BITMAPINFOHEADER);
     BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
@@ -451,12 +590,14 @@ bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
     hbitmap = ::CreateCompatibleBitmap( hdc, width, bmpHeight );
     ::SelectObject( memdc, hbitmap);
 
+#if wxUSE_PALETTE
     HPALETTE hOldPalette = 0;
     if (image.GetPalette().Ok())
     {
         hOldPalette = ::SelectPalette(memdc, (HPALETTE) image.GetPalette().GetHPALETTE(), FALSE);
         ::RealizePalette(memdc);
     }
+#endif // wxUSE_PALETTE
 
     // copy image data into DIB data and then into DDB (in a loop)
     unsigned char *data = image.GetData();
@@ -507,8 +648,10 @@ bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
     }
     SetHBITMAP( (WXHBITMAP) hbitmap );
 
+#if wxUSE_PALETTE
     if (hOldPalette)
         SelectPalette(memdc, hOldPalette, FALSE);
+#endif // wxUSE_PALETTE
 
     // similarly, created an mono-bitmap for the possible mask
     if( image.HasMask() )
@@ -589,13 +732,75 @@ bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
     GetBitmapData()->SetOk();
 #endif // WXWIN_COMPATIBILITY_2
 
-    if (wxTheBitmapList) wxTheBitmapList->AddBitmap(this);
-
     return TRUE;
+#endif
 }
 
 wxImage wxBitmap::ConvertToImage() const
 {
+#ifdef __WXMICROWIN__
+    // Initial attempt at a simple-minded implementation.
+    // The bitmap will always be created at the screen depth,
+    // so the 'depth' argument is ignored.
+    // TODO: transparency (create a mask image)
+
+    if (!Ok())
+    {
+        wxFAIL_MSG( wxT("bitmap is invalid") );
+        return wxNullImage;
+    }
+
+    wxImage image;
+
+    wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
+
+    // create an wxImage object
+    int width = GetWidth();
+    int height = GetHeight();
+    image.Create( width, height );
+    unsigned char *data = image.GetData();
+    if( !data )
+    {
+        wxFAIL_MSG( wxT("could not allocate data for image") );
+        return wxNullImage;
+    }
+
+    HDC hScreenDC = ::GetDC(NULL);
+
+    HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
+    ::ReleaseDC(NULL, hScreenDC);
+
+    HBITMAP hBitmap = (HBITMAP) GetHBITMAP();
+
+    HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap);
+
+    int i, j;
+    for (i = 0; i < GetWidth(); i++)
+    {
+        for (j = 0; j < GetHeight(); j++)
+        {
+            COLORREF color = ::GetPixel(hMemDC, i, j);
+            unsigned char red = GetRValue(color);
+            unsigned char green = GetGValue(color);
+            unsigned char blue = GetBValue(color);
+
+            image.SetRGB(i, j, red, green, blue);
+        }
+    }
+
+    ::SelectObject(hMemDC, hOldBitmap);
+    ::DeleteDC(hMemDC);
+
+#if wxUSE_PALETTE
+    // Copy the palette from the source image
+    if (GetPalette())
+        image.SetPalette(* GetPalette());
+#endif // wxUSE_PALETTE
+
+    return image;
+
+#else // __MICROWIN__
+
     wxImage image;
 
     wxCHECK_MSG( Ok(), wxNullImage, wxT("invalid bitmap") );
@@ -720,6 +925,7 @@ wxImage wxBitmap::ConvertToImage() const
     free(lpBits);
 
     return image;
+#endif
 }
 
 #endif // wxUSE_IMAGE
@@ -742,7 +948,7 @@ bool wxBitmap::LoadFile(const wxString& filename, long type)
         wxImage image;
         if ( image.LoadFile( filename, type ) && image.Ok() )
         {
-            *this = image.ConvertToBitmap();
+            *this = wxBitmap(image);
 
             return TRUE;
         }
@@ -770,7 +976,9 @@ bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
     return handler->Create(this, data, type, width, height, depth);
 }
 
-bool wxBitmap::SaveFile(const wxString& filename, int type, const wxPalette *palette)
+bool wxBitmap::SaveFile(const wxString& filename,
+                        int type,
+                        const wxPalette *palette)
 {
     wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
 
@@ -782,7 +990,7 @@ bool wxBitmap::SaveFile(const wxString& filename, int type, const wxPalette *pal
     else
     {
         // FIXME what about palette? shouldn't we use it?
-        wxImage image( *this );
+        wxImage image = ConvertToImage();
         if ( image.Ok() )
         {
             return image.SaveFile(filename, type);
@@ -808,30 +1016,39 @@ wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
     wxBitmap ret( rect.width, rect.height, GetDepth() );
     wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
 
+#ifndef __WXMICROWIN__
     // copy bitmap data
-    HDC dcSrc = ::CreateCompatibleDC(NULL);
-    HDC dcDst = ::CreateCompatibleDC(NULL);
-    SelectObject(dcSrc, (HBITMAP) GetHBITMAP());
-    SelectObject(dcDst, (HBITMAP) ret.GetHBITMAP());
-    BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
+    MemoryHDC dcSrc, dcDst;
+
+    {
+        SelectInHDC selectSrc(dcSrc, GetHbitmap()),
+                    selectDst(dcDst, GetHbitmapOf(ret));
+
+        if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
+                       dcSrc, rect.x, rect.y, SRCCOPY) )
+        {
+            wxLogLastError(_T("BitBlt"));
+        }
+    }
 
     // copy mask if there is one
-    if (GetMask())
+    if ( GetMask() )
     {
         HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
 
-        SelectObject(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap());
-        SelectObject(dcDst, (HBITMAP) hbmpMask);
-        BitBlt(dcDst, 0, 0, rect.width, rect.height, dcSrc, rect.x, rect.y, SRCCOPY);
+        SelectInHDC selectSrc(dcSrc, (HBITMAP) GetMask()->GetMaskBitmap()),
+                    selectDst(dcDst, hbmpMask);
+
+        if ( !::BitBlt(dcDst, 0, 0, rect.width, rect.height,
+                       dcSrc, rect.x, rect.y, SRCCOPY) )
+        {
+            wxLogLastError(_T("BitBlt"));
+        }
 
         wxMask *mask = new wxMask((WXHBITMAP) hbmpMask);
         ret.SetMask(mask);
     }
-
-    SelectObject(dcDst, NULL);
-    SelectObject(dcSrc, NULL);
-    DeleteDC(dcDst);
-    DeleteDC(dcSrc);
+#endif // !__WXMICROWIN__
 
     return ret;
 }
@@ -856,6 +1073,8 @@ void wxBitmap::SetOk(bool isOk)
 }
 #endif // WXWIN_COMPATIBILITY_2
 
+#if wxUSE_PALETTE
+
 void wxBitmap::SetPalette(const wxPalette& palette)
 {
     EnsureHasData();
@@ -863,6 +1082,8 @@ void wxBitmap::SetPalette(const wxPalette& palette)
     GetBitmapData()->m_bitmapPalette = palette;
 }
 
+#endif // wxUSE_PALETTE
+
 void wxBitmap::SetMask(wxMask *mask)
 {
     EnsureHasData();
@@ -876,12 +1097,16 @@ void wxBitmap::SetMask(wxMask *mask)
 // Contributed by Frederic Villeneuve <frederic.villeneuve@natinst.com>
 wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
 {
+#ifdef __WXMICROWIN__
+    return *this;
+#else
     wxMemoryDC      memDC;
     wxBitmap        tmpBitmap(GetWidth(), GetHeight(), dc.GetDepth());
     HPALETTE        hPal = (HPALETTE) NULL;
     LPBITMAPINFO    lpDib;
     void            *lpBits = (void*) NULL;
 
+#if wxUSE_PALETTE
     if( GetPalette() && GetPalette()->Ok() )
     {
         tmpBitmap.SetPalette(*GetPalette());
@@ -898,6 +1123,9 @@ wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
         memDC.SelectObject(tmpBitmap);
         memDC.SetPalette( palette );
     }
+#else // !wxUSE_PALETTE
+    hPal = (HPALETTE) ::GetStockObject(DEFAULT_PALETTE);
+#endif // wxUSE_PALETTE/!wxUSE_PALETTE
 
     // set the height negative because in a DIB the order of the lines is
     // reversed
@@ -920,6 +1148,7 @@ wxBitmap wxBitmap::GetBitmapForDC(wxDC& dc) const
     wxFreeDIB(lpDib);
 
     return tmpBitmap;
+#endif
 }
 
 // ----------------------------------------------------------------------------
@@ -963,6 +1192,7 @@ wxMask::~wxMask()
 // Create a mask from a mono bitmap (copies the bitmap).
 bool wxMask::Create(const wxBitmap& bitmap)
 {
+#ifndef __WXMICROWIN__
     wxCHECK_MSG( bitmap.Ok() && bitmap.GetDepth() == 1, FALSE,
                  _T("can't create mask from invalid or not monochrome bitmap") );
 
@@ -987,6 +1217,9 @@ bool wxMask::Create(const wxBitmap& bitmap)
     SelectObject(destDC, 0);
     DeleteDC(destDC);
     return TRUE;
+#else
+    return FALSE;
+#endif
 }
 
 // Create a mask from a bitmap and a palette index indicating
@@ -998,6 +1231,8 @@ bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
         ::DeleteObject((HBITMAP) m_maskBitmap);
         m_maskBitmap = 0;
     }
+
+#if wxUSE_PALETTE
     if (bitmap.Ok() && bitmap.GetPalette()->Ok())
     {
         unsigned char red, green, blue;
@@ -1007,6 +1242,8 @@ bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
             return Create(bitmap, transparentColour);
         }
     }
+#endif // wxUSE_PALETTE
+
     return FALSE;
 }
 
@@ -1014,6 +1251,7 @@ bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
 // the transparent area
 bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
 {
+#ifndef __WXMICROWIN__
     wxCHECK_MSG( bitmap.Ok(), FALSE, _T("invalid bitmap in wxMask::Create") );
 
     if ( m_maskBitmap )
@@ -1027,7 +1265,7 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
 
     // scan the bitmap for the transparent colour and set the corresponding
     // pixels in the mask to BLACK and the rest to WHITE
-    COLORREF maskColour = wxColourToRGB(colour);
+    COLORREF maskColour = wxColourToPalRGB(colour);
     m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0);
 
     HDC srcDC = ::CreateCompatibleDC(NULL);
@@ -1059,32 +1297,13 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
         ok = FALSE;
     }
 
-    // this is not very efficient, but I can't think of a better way of doing
-    // it
-    for ( int w = 0; ok && (w < width); w++ )
+    if ( ok )
     {
-        for ( int h = 0; ok && (h < height); h++ )
-        {
-            COLORREF col = GetPixel(srcDC, w, h);
-            if ( col == CLR_INVALID )
-            {
-                wxLogLastError(wxT("GetPixel"));
-
-                // doesn't make sense to continue
-                ok = FALSE;
-
-                break;
-            }
-
-            if ( col == maskColour )
-            {
-                ::SetPixel(destDC, w, h, RGB(0, 0, 0));
-            }
-            else
-            {
-                ::SetPixel(destDC, w, h, RGB(255, 255, 255));
-            }
-        }
+        // this will create a monochrome bitmap with 0 points for the pixels
+        // which have the same value as the background colour and 1 for the
+        // others
+        ::SetBkColor(srcDC, maskColour);
+        ::BitBlt(destDC, 0, 0, width, height, srcDC, 0, 0, NOTSRCCOPY);
     }
 
     ::SelectObject(srcDC, hbmpSrcOld);
@@ -1093,6 +1312,9 @@ bool wxMask::Create(const wxBitmap& bitmap, const wxColour& colour)
     ::DeleteDC(destDC);
 
     return ok;
+#else // __WXMICROWIN__
+    return FALSE;
+#endif // __WXMICROWIN__/!__WXMICROWIN__
 }
 
 // ----------------------------------------------------------------------------
@@ -1159,6 +1381,7 @@ bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
 // DIB functions
 // ----------------------------------------------------------------------------
 
+#ifndef __WXMICROWIN__
 bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
                  HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
 {
@@ -1206,6 +1429,7 @@ void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
 {
     free(lpDIBHeader);
 }
+#endif
 
 // ----------------------------------------------------------------------------
 // other helper functions
@@ -1213,6 +1437,7 @@ void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
 
 extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
 {
+#ifndef __WXMICROWIN__
     wxCHECK_MSG( hbmpMask, 0, _T("invalid bitmap in wxInvertMask") );
 
     // get width/height from the bitmap if not given
@@ -1250,4 +1475,7 @@ extern HBITMAP wxInvertMask(HBITMAP hbmpMask, int w, int h)
     ::DeleteDC(hdcDst);
 
     return hbmpInvMask;
+#else
+    return 0;
+#endif
 }