+ if ( GetBitmapData() )
+ GetBitmapData()->m_selectedInto = dc;
+}
+
+#endif
+
+#if wxUSE_PALETTE
+
+void wxBitmap::SetPalette(const wxPalette& palette)
+{
+ AllocExclusive();
+
+ GetBitmapData()->m_bitmapPalette = palette;
+}
+
+#endif // wxUSE_PALETTE
+
+void wxBitmap::SetMask(wxMask *mask)
+{
+ AllocExclusive();
+
+ 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
projects / wxWidgets.git / blobdiff