+wxImage wxBitmap::ConvertToImage() const
+{
+ 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 );
+ // background color set to RGB(16,16,16) in consistent with wxGTK
+ unsigned char r=16, g=16, b=16;
+ ptdata = data;
+ ptbits = lpBits;
+ for( i=0; i<height; i++ )
+ {
+ for( j=0; j<width; j++ )
+ {
+ if( *ptbits != 0 )
+ ptdata += 3;
+ else
+ {
+ *(ptdata++) = r;
+ *(ptdata++) = g;
+ *(ptdata++) = b;
+ }
+ ptbits += 3;
+ }
+ ptbits += padding;
+ }
+ image.SetMaskColour( r, g, b );
+ image.SetMask( TRUE );
+ }
+ else
+ {
+ image.SetMask( FALSE );
+ }
+ // free allocated resources
+ ::ReleaseDC(NULL, hdc);
+ free(lpDIBh);
+ free(lpBits);
+
+ return image;
+}
+
+#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
+
+void wxBitmap::SetOk(bool isOk)
+{
+ EnsureHasData();
+
+ GetBitmapData()->m_ok = isOk;
+}
+
+#endif // WXWIN_COMPATIBILITY_2
+
+#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 ( !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;
+ }
projects / wxWidgets.git / blobdiff