X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/6c9a19aabab3a878b565e6c2a5f2a3824277c4dc..e4a8a172020d5e3ee08660420142e702799c7878:/src/msw/dcclient.cpp?ds=sidebyside diff --git a/src/msw/dcclient.cpp b/src/msw/dcclient.cpp index c03897cf2a..0bfd4b112f 100644 --- a/src/msw/dcclient.cpp +++ b/src/msw/dcclient.cpp @@ -17,7 +17,7 @@ // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation "dcclient.h" #endif @@ -65,6 +65,7 @@ WX_DEFINE_OBJARRAY(wxArrayDCInfo); IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC) IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxWindowDC) IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxClientDC) +IMPLEMENT_CLASS(wxPaintDCEx, wxPaintDC) // ---------------------------------------------------------------------------- // global variables @@ -292,11 +293,10 @@ wxPaintDCInfo *wxPaintDC::FindInCache(size_t *index) const // find the entry for this DC in the cache (keyed by the window) WXHDC wxPaintDC::FindDCInCache(wxWindow* win) { - wxPaintDCInfo *info = NULL; size_t nCache = ms_cache.GetCount(); for ( size_t n = 0; n < nCache; n++ ) { - info = &ms_cache[n]; + wxPaintDCInfo *info = &ms_cache[n]; if ( info->hwnd == win->GetHWND() ) { return info->hdc; @@ -305,3 +305,52 @@ WXHDC wxPaintDC::FindDCInCache(wxWindow* win) return 0; } +/* + * wxPaintDCEx + */ + +// TODO: don't duplicate wxPaintDC code here!! + +wxPaintDCEx::wxPaintDCEx(wxWindow *canvas, WXHDC dc) : saveState(0) +{ + wxCHECK_RET( dc, wxT("wxPaintDCEx requires an existing device context") ); + + m_canvas = canvas; + + wxPaintDCInfo *info = FindInCache(); + if ( info ) + { + m_hDC = info->hdc; + info->count++; + } + else // not in cache, create a new one + { + m_hDC = dc; + ms_cache.Add(new wxPaintDCInfo(m_canvas, this)); + saveState = SaveDC((HDC) dc); + } +} + +wxPaintDCEx::~wxPaintDCEx() +{ + size_t index; + wxPaintDCInfo *info = FindInCache(&index); + + wxCHECK_RET( info, wxT("existing DC should have a cache entry") ); + + if ( !--info->count ) + { + RestoreDC((HDC) m_hDC, saveState); + ms_cache.RemoveAt(index); + + // Reduce the number of bogus reports of non-freed memory + // at app exit + if (ms_cache.IsEmpty()) + ms_cache.Clear(); + } + //else: cached DC entry is still in use + + // prevent the base class dtor from ReleaseDC()ing it again + m_hDC = 0; +} +