+ // calc the number of bytes per scanline and padding in the DIB
+ int bytePerLine = width*3;
+ int sizeDWORD = sizeof( DWORD );
+ int lineBoundary = bytePerLine % sizeDWORD;
+ int padding = 0;
+ if( lineBoundary > 0 )
+ {
+ padding = sizeDWORD - lineBoundary;
+ bytePerLine += padding;
+ }
+
+ // create a DIB header
+ int headersize = sizeof(BITMAPINFOHEADER);
+ BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
+ if( !lpDIBh )
+ {
+ wxFAIL_MSG( wxT("could not allocate data for DIB header") );
+ free( data );
+ return wxNullImage;
+ }
+ // Fill in the DIB header
+ lpDIBh->bmiHeader.biSize = headersize;
+ lpDIBh->bmiHeader.biWidth = width;
+ lpDIBh->bmiHeader.biHeight = -height;
+ lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
+ lpDIBh->bmiHeader.biPlanes = 1;
+ lpDIBh->bmiHeader.biBitCount = 24;
+ lpDIBh->bmiHeader.biCompression = BI_RGB;
+ lpDIBh->bmiHeader.biClrUsed = 0;
+ // These seem not really needed for our purpose here.
+ lpDIBh->bmiHeader.biClrImportant = 0;
+ lpDIBh->bmiHeader.biXPelsPerMeter = 0;
+ lpDIBh->bmiHeader.biYPelsPerMeter = 0;
+
+ // memory for DIB data is allocated by CreateDIBSection
+ void *lpBits = NULL;
+
+ // copy data from the device-dependent bitmap to the DIB
+ HDC hdc = ::GetDC(NULL);
+ HBITMAP hBitmap = (HBITMAP) GetHBITMAP();
+
+ HBITMAP hBitmapSection = ::CreateDIBSection( hdc, lpDIBh, DIB_RGB_COLORS, & lpBits, NULL, 0 );
+ if (!hBitmapSection)
+ {
+ wxFAIL_MSG( wxT("could not create a DIB section") );
+ return wxNullImage;
+ }
+
+ // Copy the image from the DDB to the DIBSection
+ // Need to copy the supplied bitmap onto the newly created DIBsection
+ HDC hMemDC = CreateCompatibleDC(hdc);
+ HDC hCopyDC = CreateCompatibleDC(hdc);
+
+ if (! hMemDC || ! hCopyDC)
+ {
+ wxFAIL_MSG( wxT("unable to create compatible DCs") );
+ return wxNullImage;
+ }
+
+#if 0
+ if (m_hPal)
+ {
+ SelectPalette(hMemDC, m_hPal, FALSE); RealizePalette(hMemDC);
+ SelectPalette(hCopyDC, m_hPal, FALSE); RealizePalette(hCopyDC);
+ }
+#endif
+
+ HBITMAP hOldMemBitmap = (HBITMAP) SelectObject(hMemDC, hBitmap);
+ HBITMAP hOldCopyBitmap = (HBITMAP) SelectObject(hCopyDC, hBitmapSection);
+
+ BitBlt(hCopyDC, 0, 0, GetWidth(), GetHeight(), hMemDC, 0, 0, SRCCOPY);
+
+ SelectObject(hMemDC, hOldMemBitmap);
+ SelectObject(hCopyDC, hOldCopyBitmap);
+ DeleteDC(hMemDC);
+ DeleteDC(hCopyDC);
+
+#if 0
+ if (m_hPal)
+ {
+ HGDIOBJ hObj = ::GetStockObject(DEFAULT_PALETTE);
+ SelectObject(hMemDC, hObj);
+ SelectObject(hCopyDC, hObj);
+ }
+#endif
+
+ ReleaseDC(NULL, hdc);
+
+ // copy DIB data into the wxImage object
+ int i, j;
+ unsigned char *ptdata = data;
+ unsigned char *ptbits = (unsigned char*) lpBits;
+ for( i=0; i<height; i++ )
+ {
+ for( j=0; j<width; j++ )
+ {
+ *(ptdata++) = *(ptbits+2);
+ *(ptdata++) = *(ptbits+1);
+ *(ptdata++) = *(ptbits );
+ ptbits += 3;
+ }
+ ptbits += padding;
+ }
+
+ // TODO
+#if 0
+ // similarly, set data according to the possible mask bitmap
+ if( GetMask() && GetMask()->GetMaskBitmap() )
+ {
+ hbitmap = (HBITMAP) GetMask()->GetMaskBitmap();
+ // memory DC created, color set, data copied, and memory DC deleted
+ HDC memdc = ::CreateCompatibleDC( hdc );
+ ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
+ ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
+ ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
+ ::DeleteDC( memdc );
+ ptdata = data;
+ ptbits = lpBits;
+ for( i=0; i<height; i++ )
+ {
+ for( j=0; j<width; j++ )
+ {
+ // is this pixel transparent?
+ if ( *ptbits != 0 )
+ {
+ if ( (ptdata[0] == MASK_RED) &&
+ (ptdata[1] == MASK_GREEN) &&
+ (ptdata[2] == MASK_BLUE) )
+ {
+ // we have to fudge the colour a bit to prevent this
+ // pixel from appearing transparent
+ ptdata[2] = MASK_BLUE_REPLACEMENT;
+ }
+ ptdata += 3;
+ }
+ else // masked pixel
+ {
+ *(ptdata++) = MASK_RED;
+ *(ptdata++) = MASK_GREEN;
+ *(ptdata++) = MASK_BLUE;
+ }
+ ptbits += 3;
+ }
+ ptbits += padding;
+ }
+
+ image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
+ image.SetMask( TRUE );
+ }
+ else
+#endif
+ {
+ image.SetMask( FALSE );
+ }
+
+ // free allocated resources
+ ::ReleaseDC(NULL, hdc);
+ free(lpDIBh);
+
+ // Delete the DIB section
+ ::DeleteObject(hBitmapSection);
+
+ return image;
+#else
+ // the colour used as transparent one in wxImage and the one it is replaced
+ // with when it really occurs in the bitmap
+ static const int MASK_RED = 1;
+ static const int MASK_GREEN = 2;
+ static const int MASK_BLUE = 3;
+ static const int MASK_BLUE_REPLACEMENT = 2;
+
+ 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;
+ }
+
+ // calc the number of bytes per scanline and padding in the DIB
+ int bytePerLine = width*3;
+ int sizeDWORD = sizeof( DWORD );
+ int lineBoundary = bytePerLine % sizeDWORD;
+ int padding = 0;
+ if( lineBoundary > 0 )
+ {
+ padding = sizeDWORD - lineBoundary;
+ bytePerLine += padding;
+ }
+
+ // create a DIB header
+ int headersize = sizeof(BITMAPINFOHEADER);
+ BITMAPINFO *lpDIBh = (BITMAPINFO *) malloc( headersize );
+ if( !lpDIBh )
+ {
+ wxFAIL_MSG( wxT("could not allocate data for DIB header") );
+ free( data );
+ return wxNullImage;
+ }
+ // Fill in the DIB header
+ lpDIBh->bmiHeader.biSize = headersize;
+ lpDIBh->bmiHeader.biWidth = width;
+ lpDIBh->bmiHeader.biHeight = -height;
+ lpDIBh->bmiHeader.biSizeImage = bytePerLine * height;
+ lpDIBh->bmiHeader.biPlanes = 1;
+ lpDIBh->bmiHeader.biBitCount = 24;
+ lpDIBh->bmiHeader.biCompression = BI_RGB;
+ lpDIBh->bmiHeader.biClrUsed = 0;
+ // These seem not really needed for our purpose here.
+ lpDIBh->bmiHeader.biClrImportant = 0;
+ lpDIBh->bmiHeader.biXPelsPerMeter = 0;
+ lpDIBh->bmiHeader.biYPelsPerMeter = 0;
+ // memory for DIB data
+ unsigned char *lpBits;
+ lpBits = (unsigned char *) malloc( lpDIBh->bmiHeader.biSizeImage );
+ if( !lpBits )
+ {
+ wxFAIL_MSG( wxT("could not allocate data for DIB") );
+ free( data );
+ free( lpDIBh );
+ return wxNullImage;
+ }
+
+ // copy data from the device-dependent bitmap to the DIB
+ HDC hdc = ::GetDC(NULL);
+ HBITMAP hbitmap;
+ hbitmap = (HBITMAP) GetHBITMAP();
+ ::GetDIBits( hdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
+
+ // copy DIB data into the wxImage object
+ int i, j;
+ unsigned char *ptdata = data;
+ unsigned char *ptbits = lpBits;
+ for( i=0; i<height; i++ )
+ {
+ for( j=0; j<width; j++ )
+ {
+ *(ptdata++) = *(ptbits+2);
+ *(ptdata++) = *(ptbits+1);
+ *(ptdata++) = *(ptbits );
+ ptbits += 3;
+ }
+ ptbits += padding;
+ }
+
+ // similarly, set data according to the possible mask bitmap
+ if( GetMask() && GetMask()->GetMaskBitmap() )
+ {
+ hbitmap = (HBITMAP) GetMask()->GetMaskBitmap();
+ // memory DC created, color set, data copied, and memory DC deleted
+ HDC memdc = ::CreateCompatibleDC( hdc );
+ ::SetTextColor( memdc, RGB( 0, 0, 0 ) );
+ ::SetBkColor( memdc, RGB( 255, 255, 255 ) );
+ ::GetDIBits( memdc, hbitmap, 0, height, lpBits, lpDIBh, DIB_RGB_COLORS );
+ ::DeleteDC( memdc );
+ ptdata = data;
+ ptbits = lpBits;
+ for( i=0; i<height; i++ )
+ {
+ for( j=0; j<width; j++ )
+ {
+ // is this pixel transparent?
+ if ( *ptbits != 0 )
+ {
+ if ( (ptdata[0] == MASK_RED) &&
+ (ptdata[1] == MASK_GREEN) &&
+ (ptdata[2] == MASK_BLUE) )
+ {
+ // we have to fudge the colour a bit to prevent this
+ // pixel from appearing transparent
+ ptdata[2] = MASK_BLUE_REPLACEMENT;
+ }
+ ptdata += 3;
+ }
+ else // masked pixel
+ {
+ *(ptdata++) = MASK_RED;
+ *(ptdata++) = MASK_GREEN;
+ *(ptdata++) = MASK_BLUE;
+ }
+ ptbits += 3;
+ }
+ ptbits += padding;
+ }
+
+ image.SetMaskColour( MASK_RED, MASK_GREEN, MASK_BLUE );
+ image.SetMask( TRUE );
+ }
+ else
+ {
+ image.SetMask( FALSE );
+ }
+ // free allocated resources
+ ::ReleaseDC(NULL, hdc);
+ free(lpDIBh);
+ free(lpBits);
+
+ return image;
+#endif
+}
+
+#endif // wxUSE_IMAGE
+
+// ----------------------------------------------------------------------------
+// loading and saving bitmaps
+// ----------------------------------------------------------------------------
+
+bool wxBitmap::LoadFile(const wxString& filename, long type)
+{
+ UnRef();
+
+ wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
+
+ if ( handler )
+ {
+ m_refData = new wxBitmapRefData;
+
+ return handler->LoadFile(this, filename, type, -1, -1);
+ }
+#if wxUSE_IMAGE
+ else
+ {
+ wxImage image;
+ if ( image.LoadFile( filename, type ) && image.Ok() )
+ {
+ *this = wxBitmap(image);
+
+ return TRUE;
+ }
+ }
+#endif // wxUSE_IMAGE
+
+ return FALSE;
+}
+
+bool wxBitmap::Create(void *data, long type, int width, int height, int depth)
+{
+ UnRef();
+
+ wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
+
+ if ( !handler )
+ {
+ wxLogDebug(wxT("Failed to create bitmap: no bitmap handler for type %ld defined."), type);
+
+ return FALSE;
+ }
+
+ m_refData = new wxBitmapRefData;
+
+ return handler->Create(this, data, type, width, height, depth);
+}
+
+bool wxBitmap::SaveFile(const wxString& filename,
+ int type,
+ const wxPalette *palette)
+{
+ wxBitmapHandler *handler = wxDynamicCast(FindHandler(type), wxBitmapHandler);
+
+ if ( handler )
+ {
+ return handler->SaveFile(this, filename, type, palette);
+ }
+#if wxUSE_IMAGE
+ else
+ {
+ // FIXME what about palette? shouldn't we use it?
+ wxImage image = ConvertToImage();
+ if ( image.Ok() )
+ {
+ return image.SaveFile(filename, type);
+ }
+ }
+#endif // wxUSE_IMAGE
+
+ return FALSE;
+}
+
+// ----------------------------------------------------------------------------
+// sub bitmap extraction
+// ----------------------------------------------------------------------------
+
+wxBitmap wxBitmap::GetSubBitmap( const wxRect& rect) const
+{
+ wxCHECK_MSG( Ok() &&
+ (rect.x >= 0) && (rect.y >= 0) &&
+ (rect.x+rect.width <= GetWidth()) &&
+ (rect.y+rect.height <= GetHeight()),
+ wxNullBitmap, wxT("Invalid bitmap or bitmap region") );
+
+ wxBitmap ret( rect.width, rect.height );
+ wxASSERT_MSG( ret.Ok(), wxT("GetSubBitmap error") );
+
+#ifndef __WXMICROWIN__
+ // TODO: copy alpha channel data if any
+
+ // copy bitmap data
+ MemoryHDC dcSrc,
+ dcDst;
+
+ {
+ SelectInHDC selectSrc(dcSrc, GetHbitmap()),
+ selectDst(dcDst, GetHbitmapOf(ret));
+
+ if ( !selectSrc || !selectDst )
+ {
+ wxLogLastError(_T("SelectObjct(hBitmap)"));
+ }
+
+ 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() )
+ {
+ HBITMAP hbmpMask = ::CreateBitmap(rect.width, rect.height, 1, 1, 0);
+
+ 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);
+ }
+#endif // !__WXMICROWIN__
+
+ return ret;
+}
+
+// ----------------------------------------------------------------------------
+// wxBitmap accessors
+// ----------------------------------------------------------------------------
+
+#if wxUSE_PALETTE
+wxPalette* wxBitmap::GetPalette() const
+{
+ return GetBitmapData() ? &GetBitmapData()->m_bitmapPalette
+ : (wxPalette *) NULL;
+}
+#endif
+
+wxMask *wxBitmap::GetMask() const
+{
+ return GetBitmapData() ? GetBitmapData()->GetMask() : (wxMask *) NULL;
+}
+
+#ifdef __WXDEBUG__
+
+wxDC *wxBitmap::GetSelectedInto() const
+{
+ return GetBitmapData() ? GetBitmapData()->m_selectedInto : (wxDC *) NULL;
+}
+
+#endif
+
+#if WXWIN_COMPATIBILITY_2_4
+
+int wxBitmap::GetQuality() const
+{
+ return 0;
+}
+
+#endif // WXWIN_COMPATIBILITY_2_4
+
+void wxBitmap::UseAlpha()
+{
+ if ( GetBitmapData() )
+ GetBitmapData()->m_hasAlpha = true;
+}
+
+bool wxBitmap::HasAlpha() const
+{
+ return GetBitmapData() && GetBitmapData()->m_hasAlpha;
+}
+
+// ----------------------------------------------------------------------------
+// wxBitmap setters
+// ----------------------------------------------------------------------------
+
+#ifdef __WXDEBUG__
+
+void wxBitmap::SetSelectedInto(wxDC *dc)
+{
+ if ( GetBitmapData() )
+ GetBitmapData()->m_selectedInto = dc;
+}
+
+#endif
+
+#if wxUSE_PALETTE
+
+void wxBitmap::SetPalette(const wxPalette& palette)
+{
+ EnsureHasData();
+
+ GetBitmapData()->m_bitmapPalette = palette;
+}
+
+#endif // wxUSE_PALETTE
+
+void wxBitmap::SetMask(wxMask *mask)
+{
+ EnsureHasData();
+
+ GetBitmapData()->SetMask(mask);
+}
+
+#if WXWIN_COMPATIBILITY_2_4
+
+void wxBitmap::SetQuality(int WXUNUSED(quality))
+{
+}
+
+#endif // WXWIN_COMPATIBILITY_2_4
+
+// ----------------------------------------------------------------------------
+// raw bitmap access support
+// ----------------------------------------------------------------------------
+
+#ifdef wxHAVE_RAW_BITMAP
+void *wxBitmap::GetRawData(wxPixelDataBase& data, int bpp)
+{
+#if wxUSE_WXDIB
+ if ( !Ok() )
+ {
+ // no bitmap, no data (raw or otherwise)
+ return NULL;
+ }
+
+ // if we're already a DIB we can access our data directly, but if not we
+ // need to convert this DDB to a DIB section and use it for raw access and
+ // then convert it back
+ HBITMAP hDIB;
+ if ( !GetBitmapData()->m_isDIB )
+ {
+ wxCHECK_MSG( !GetBitmapData()->m_dib, FALSE,
+ _T("GetRawData() may be called only once") );
+
+ wxDIB *dib = new wxDIB(*this);
+ if ( !dib->IsOk() )
+ {
+ delete dib;
+
+ return NULL;
+ }
+
+ // we'll free it in UngetRawData()
+ GetBitmapData()->m_dib = dib;
+
+ hDIB = dib->GetHandle();
+ }
+ else // we're a DIB
+ {
+ hDIB = GetHbitmap();
+ }
+
+ DIBSECTION ds;
+ if ( ::GetObject(hDIB, sizeof(ds), &ds) != sizeof(DIBSECTION) )
+ {
+ wxFAIL_MSG( _T("failed to get DIBSECTION from a DIB?") );
+
+ return NULL;
+ }
+
+ // check that the bitmap is in correct format
+ if ( ds.dsBm.bmBitsPixel != bpp )
+ {
+ wxFAIL_MSG( _T("incorrect bitmap type in wxBitmap::GetRawData()") );
+
+ return NULL;
+ }
+
+ // ok, store the relevant info in wxPixelDataBase
+ const LONG h = ds.dsBm.bmHeight;
+
+ data.m_width = ds.dsBm.bmWidth;
+ data.m_height = h;
+
+ // remember that DIBs are stored in top to bottom order!
+ const LONG bytesPerRow = ds.dsBm.bmWidthBytes;
+ data.m_stride = -bytesPerRow;
+
+ char *bits = (char *)ds.dsBm.bmBits;
+ if ( h > 1 )
+ {
+ bits += (h - 1)*bytesPerRow;
+ }
+
+ return bits;
+#else
+ return NULL;
+#endif
+}
+
+void wxBitmap::UngetRawData(wxPixelDataBase& dataBase)
+{
+#if wxUSE_WXDIB
+ 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 )
+ {
+ // invalid data, don't crash -- but don't assert neither as we're
+ // called automatically from wxPixelDataBase dtor and so there is no
+ // way to prevent this from happening
+ 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 )
+ {
+ wxDIB *dib = GetBitmapData()->m_dib;
+ GetBitmapData()->m_dib = NULL;
+
+ // TODO: convert
+
+ delete dib;
+ }
+#endif // wxUSE_WXDIB
+}
+#endif // #ifdef wxHAVE_RAW_BITMAP
+
+// ----------------------------------------------------------------------------
+// wxMask
+// ----------------------------------------------------------------------------
+
+wxMask::wxMask()
+{
+ m_maskBitmap = 0;
+}
+
+// Construct a mask from a bitmap and a colour indicating
+// the transparent area
+wxMask::wxMask(const wxBitmap& bitmap, const wxColour& colour)
+{
+ m_maskBitmap = 0;
+ Create(bitmap, colour);
+}
+
+// Construct a mask from a bitmap and a palette index indicating
+// the transparent area
+wxMask::wxMask(const wxBitmap& bitmap, int paletteIndex)
+{
+ m_maskBitmap = 0;
+ Create(bitmap, paletteIndex);
+}
+
+// Construct a mask from a mono bitmap (copies the bitmap).
+wxMask::wxMask(const wxBitmap& bitmap)
+{
+ m_maskBitmap = 0;
+ Create(bitmap);
+}
+
+wxMask::~wxMask()
+{
+ if ( m_maskBitmap )
+ ::DeleteObject((HBITMAP) m_maskBitmap);
+}
+
+// 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") );
+
+ if ( m_maskBitmap )
+ {
+ ::DeleteObject((HBITMAP) m_maskBitmap);
+ m_maskBitmap = 0;
+ }
+
+ m_maskBitmap = (WXHBITMAP) CreateBitmap(
+ bitmap.GetWidth(),
+ bitmap.GetHeight(),
+ 1, 1, 0
+ );
+ HDC srcDC = CreateCompatibleDC(0);
+ SelectObject(srcDC, (HBITMAP) bitmap.GetHBITMAP());
+ HDC destDC = CreateCompatibleDC(0);
+ SelectObject(destDC, (HBITMAP) m_maskBitmap);
+ BitBlt(destDC, 0, 0, bitmap.GetWidth(), bitmap.GetHeight(), srcDC, 0, 0, SRCCOPY);
+ SelectObject(srcDC, 0);
+ DeleteDC(srcDC);
+ SelectObject(destDC, 0);
+ DeleteDC(destDC);
+ return TRUE;
+#else
+ return FALSE;
+#endif
+}
+
+// Create a mask from a bitmap and a palette index indicating
+// the transparent area
+bool wxMask::Create(const wxBitmap& bitmap, int paletteIndex)
+{
+ if ( m_maskBitmap )
+ {
+ ::DeleteObject((HBITMAP) m_maskBitmap);
+ m_maskBitmap = 0;
+ }
+
+#if wxUSE_PALETTE
+ if (bitmap.Ok() && bitmap.GetPalette()->Ok())
+ {
+ unsigned char red, green, blue;
+ if (bitmap.GetPalette()->GetRGB(paletteIndex, &red, &green, &blue))
+ {
+ wxColour transparentColour(red, green, blue);
+ return Create(bitmap, transparentColour);
+ }
+ }
+#endif // wxUSE_PALETTE
+
+ return FALSE;
+}
+
+// Create a mask from a bitmap and a colour indicating
+// 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 )
+ {
+ ::DeleteObject((HBITMAP) m_maskBitmap);
+ m_maskBitmap = 0;
+ }
+
+ int width = bitmap.GetWidth(),
+ height = bitmap.GetHeight();
+
+ // scan the bitmap for the transparent colour and set the corresponding
+ // pixels in the mask to BLACK and the rest to WHITE
+ COLORREF maskColour = wxColourToPalRGB(colour);
+ m_maskBitmap = (WXHBITMAP)::CreateBitmap(width, height, 1, 1, 0);
+
+ HDC srcDC = ::CreateCompatibleDC(NULL);
+ HDC destDC = ::CreateCompatibleDC(NULL);
+ if ( !srcDC || !destDC )
+ {
+ wxLogLastError(wxT("CreateCompatibleDC"));
+ }
+
+ bool ok = TRUE;
+
+ // SelectObject() will fail
+ wxASSERT_MSG( !bitmap.GetSelectedInto(),
+ _T("bitmap can't be selected in another DC") );
+
+ HGDIOBJ hbmpSrcOld = ::SelectObject(srcDC, GetHbitmapOf(bitmap));
+ if ( !hbmpSrcOld )
+ {
+ wxLogLastError(wxT("SelectObject"));
+
+ ok = FALSE;
+ }
+
+ HGDIOBJ hbmpDstOld = ::SelectObject(destDC, (HBITMAP)m_maskBitmap);
+ if ( !hbmpDstOld )
+ {
+ wxLogLastError(wxT("SelectObject"));
+
+ ok = FALSE;
+ }
+
+ if ( ok )
+ {
+ // 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);
+ ::DeleteDC(srcDC);
+ ::SelectObject(destDC, hbmpDstOld);
+ ::DeleteDC(destDC);
+
+ return ok;
+#else // __WXMICROWIN__
+ return FALSE;
+#endif // __WXMICROWIN__/!__WXMICROWIN__
+}
+
+// ----------------------------------------------------------------------------
+// wxBitmapHandler
+// ----------------------------------------------------------------------------
+
+bool wxBitmapHandler::Create(wxGDIImage *image,
+ void *data,
+ long flags,
+ int width, int height, int depth)
+{
+ wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
+
+ return bitmap ? Create(bitmap, data, flags, width, height, depth) : FALSE;
+}
+
+bool wxBitmapHandler::Load(wxGDIImage *image,
+ const wxString& name,
+ long flags,
+ int width, int height)
+{
+ wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
+
+ return bitmap ? LoadFile(bitmap, name, flags, width, height) : FALSE;
+}
+
+bool wxBitmapHandler::Save(wxGDIImage *image,
+ const wxString& name,
+ int type)
+{
+ wxBitmap *bitmap = wxDynamicCast(image, wxBitmap);
+
+ return bitmap ? SaveFile(bitmap, name, type) : FALSE;
+}
+
+bool wxBitmapHandler::Create(wxBitmap *WXUNUSED(bitmap),
+ void *WXUNUSED(data),
+ long WXUNUSED(type),
+ int WXUNUSED(width),
+ int WXUNUSED(height),
+ int WXUNUSED(depth))
+{
+ return FALSE;
+}
+
+bool wxBitmapHandler::LoadFile(wxBitmap *WXUNUSED(bitmap),
+ const wxString& WXUNUSED(name),
+ long WXUNUSED(type),
+ int WXUNUSED(desiredWidth),
+ int WXUNUSED(desiredHeight))
+{
+ return FALSE;
+}
+
+bool wxBitmapHandler::SaveFile(wxBitmap *WXUNUSED(bitmap),
+ const wxString& WXUNUSED(name),
+ int WXUNUSED(type),
+ const wxPalette *WXUNUSED(palette))
+{
+ return FALSE;
+}
+
+// ----------------------------------------------------------------------------
+// DIB functions
+// ----------------------------------------------------------------------------
+
+#ifndef __WXMICROWIN__
+bool wxCreateDIB(long xSize, long ySize, long bitsPerPixel,
+ HPALETTE hPal, LPBITMAPINFO* lpDIBHeader)
+{
+ unsigned long i, headerSize;
+
+ // Allocate space for a DIB header
+ headerSize = (sizeof(BITMAPINFOHEADER) + (256 * sizeof(PALETTEENTRY)));
+ LPBITMAPINFO lpDIBheader = (BITMAPINFO *) malloc(headerSize);
+ LPPALETTEENTRY lpPe = (PALETTEENTRY *)((BYTE*)lpDIBheader + sizeof(BITMAPINFOHEADER));
+
+ GetPaletteEntries(hPal, 0, 256, lpPe);
+
+ memset(lpDIBheader, 0x00, sizeof(BITMAPINFOHEADER));
+
+ // Fill in the static parts of the DIB header
+ lpDIBheader->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+ lpDIBheader->bmiHeader.biWidth = xSize;
+ lpDIBheader->bmiHeader.biHeight = ySize;
+ lpDIBheader->bmiHeader.biPlanes = 1;
+
+ // 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.biClrUsed = 256;
+
+
+ // Initialize the DIB palette
+ for (i = 0; i < 256; i++) {
+ lpDIBheader->bmiColors[i].rgbReserved = lpPe[i].peFlags;
+ lpDIBheader->bmiColors[i].rgbRed = lpPe[i].peRed;
+ lpDIBheader->bmiColors[i].rgbGreen = lpPe[i].peGreen;
+ lpDIBheader->bmiColors[i].rgbBlue = lpPe[i].peBlue;
+ }
+
+ *lpDIBHeader = lpDIBheader;
+
+ return TRUE;
+}
+
+void wxFreeDIB(LPBITMAPINFO lpDIBHeader)
+{
+ free(lpDIBHeader);
+}
+#endif
+
+// ----------------------------------------------------------------------------
+// global helper functions implemented here
+// ----------------------------------------------------------------------------
+
+// helper of wxBitmapToHICON/HCURSOR
+static
+HICON wxBitmapToIconOrCursor(const wxBitmap& bmp,
+ bool iconWanted,
+ int hotSpotX,
+ int hotSpotY)
+{
+ if ( !bmp.Ok() )
+ {
+ // we can't create an icon/cursor form nothing
+ return 0;
+ }
+
+ wxMask *mask = bmp.GetMask();
+ if ( !mask )
+ {
+ // we must have a mask for an icon, so even if it's probably incorrect,
+ // do create it (grey is the "standard" transparent colour)
+ mask = new wxMask(bmp, *wxLIGHT_GREY);
+ }
+
+ ICONINFO iconInfo;
+ wxZeroMemory(iconInfo);
+ iconInfo.fIcon = iconWanted; // do we want an icon or a cursor?
+ if ( !iconWanted )
+ {
+ iconInfo.xHotspot = hotSpotX;
+ iconInfo.yHotspot = hotSpotY;
+ }
+
+ iconInfo.hbmMask = wxInvertMask((HBITMAP)mask->GetMaskBitmap());
+ iconInfo.hbmColor = GetHbitmapOf(bmp);
+
+ // black out the transparent area to preserve background colour, because
+ // Windows blits the original bitmap using SRCINVERT (XOR) after applying
+ // the mask to the dest rect.
+ {
+ MemoryHDC dcSrc, dcDst;
+ SelectInHDC selectMask(dcSrc, (HBITMAP)mask->GetMaskBitmap()),
+ selectBitmap(dcDst, iconInfo.hbmColor);
+
+ if ( !::BitBlt(dcDst, 0, 0, bmp.GetWidth(), bmp.GetHeight(),
+ dcSrc, 0, 0, SRCAND) )
+ {
+ wxLogLastError(_T("BitBlt"));
+ }
+ }
+
+ HICON hicon = ::CreateIconIndirect(&iconInfo);
+
+ if ( !bmp.GetMask() )
+ {
+ // we created the mask, now delete it
+ delete mask;
+ }
+
+ // delete the inverted mask bitmap we created as well
+ ::DeleteObject(iconInfo.hbmMask);
+
+ return hicon;
+}
+
+HICON wxBitmapToHICON(const wxBitmap& bmp)
+{
+ return wxBitmapToIconOrCursor(bmp, TRUE, 0, 0);
+}
+
+HCURSOR wxBitmapToHCURSOR(const wxBitmap& bmp, int hotSpotX, int hotSpotY)
+{
+ return (HCURSOR)wxBitmapToIconOrCursor(bmp, FALSE, hotSpotX, hotSpotY);
+}
+
+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
+ if ( !w || !h )
+ {
+ BITMAP bm;
+ ::GetObject(hbmpMask, sizeof(BITMAP), (LPVOID)&bm);
+ w = bm.bmWidth;
+ h = bm.bmHeight;
+ }
+
+ HDC hdcSrc = ::CreateCompatibleDC(NULL);
+ HDC hdcDst = ::CreateCompatibleDC(NULL);
+ if ( !hdcSrc || !hdcDst )
+ {
+ wxLogLastError(wxT("CreateCompatibleDC"));
+ }
+
+ HBITMAP hbmpInvMask = ::CreateBitmap(w, h, 1, 1, 0);
+ if ( !hbmpInvMask )
+ {
+ wxLogLastError(wxT("CreateBitmap"));
+ }
+
+ HGDIOBJ srcTmp = ::SelectObject(hdcSrc, hbmpMask);
+ HGDIOBJ dstTmp = ::SelectObject(hdcDst, hbmpInvMask);
+ if ( !::BitBlt(hdcDst, 0, 0, w, h,
+ hdcSrc, 0, 0,
+ NOTSRCCOPY) )
+ {
+ wxLogLastError(wxT("BitBlt"));
+ }
+
+ // Deselect objects
+ SelectObject(hdcSrc,srcTmp);
+ SelectObject(hdcDst,dstTmp);
+
+ ::DeleteDC(hdcSrc);
+ ::DeleteDC(hdcDst);
+
+ return hbmpInvMask;
+#else
+ return 0;
+#endif
+}
projects / wxWidgets.git / blobdiff