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Diffstat (limited to 'basegfx/inc/basegfx/polygon/b2dpolypolygonfillrule.hxx')
-rw-r--r-- | basegfx/inc/basegfx/polygon/b2dpolypolygonfillrule.hxx | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/basegfx/inc/basegfx/polygon/b2dpolypolygonfillrule.hxx b/basegfx/inc/basegfx/polygon/b2dpolypolygonfillrule.hxx new file mode 100644 index 000000000000..2517a9c423e9 --- /dev/null +++ b/basegfx/inc/basegfx/polygon/b2dpolypolygonfillrule.hxx @@ -0,0 +1,63 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +#ifndef _BGFX_POLYGON_B2DPOLYPOLYGONFILLRULE_HXX +#define _BGFX_POLYGON_B2DPOLYPOLYGONFILLRULE_HXX + +#include <sal/types.h> + +////////////////////////////////////////////////////////////////////////////// + +namespace basegfx +{ + /** Fill rule to use for poly-polygon filling. + + The fill rule determines which areas are inside, and which are + outside the poly-polygon. + */ + enum FillRule + { + /** Areas, for which a scanline has crossed an odd number of + vertices, are regarded 'inside', the remainder 'outside' + of the poly-polygon. + */ + FillRule_EVEN_ODD, + + /** For each edge a scanline crosses, a current winding number + is updated. Downward edges count +1, upward edges count + -1. If the total accumulated winding number for one area + is not zero, this area is regarded 'inside', otherwise, + 'outside'. + */ + FillRule_NONZERO_WINDING_NUMBER + }; +} + +#endif /* _BGFX_POLYGON_B2DPOLYPOLYGONFILLRULE_HXX */ + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |