+ wxAntialiasMode formerAa = m_graphicContext->GetAntialiasMode();
+ if (mode == wxCOMPOSITION_XOR)
+ {
+ m_graphicContext->SetAntialiasMode(wxANTIALIAS_NONE);
+ }
+
+ if (xsrcMask == -1 && ysrcMask == -1)
+ {
+ xsrcMask = xsrc;
+ ysrcMask = ysrc;
+ }
+
+ wxRect subrect(source->LogicalToDeviceX(xsrc),
+ source->LogicalToDeviceY(ysrc),
+ source->LogicalToDeviceXRel(srcWidth),
+ source->LogicalToDeviceYRel(srcHeight));
+
+ // if needed clip the subrect down to the size of the source DC
+ wxCoord sw, sh;
+ source->GetSize(&sw, &sh);
+ sw = source->LogicalToDeviceXRel(sw);
+ sh = source->LogicalToDeviceYRel(sh);
+ if (subrect.x + subrect.width > sw)
+ subrect.width = sw - subrect.x;
+ if (subrect.y + subrect.height > sh)
+ subrect.height = sh - subrect.y;
+
+ wxBitmap blit = source->GetAsBitmap( &subrect );
+
+ if ( blit.IsOk() )
+ {
+ if ( !useMask && blit.GetMask() )
+ blit.SetMask(NULL);
+
+ m_graphicContext->DrawBitmap( blit, xdest, ydest,
+ dstWidth, dstHeight);
+ }
+ else
+ {
+ wxFAIL_MSG( wxT("Cannot Blit. Unable to get contents of DC as bitmap.") );
+ retval = false;
+ }
+
+ if (mode == wxCOMPOSITION_XOR)
+ {
+ m_graphicContext->SetAntialiasMode(formerAa);
+ }