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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 05:54:39 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 05:54:39 +0000 |
commit | 267c6f2ac71f92999e969232431ba04678e7437e (patch) | |
tree | 358c9467650e1d0a1d7227a21dac2e3d08b622b2 /include/basegfx/utils/rectcliptools.hxx | |
parent | Initial commit. (diff) | |
download | libreoffice-267c6f2ac71f92999e969232431ba04678e7437e.tar.xz libreoffice-267c6f2ac71f92999e969232431ba04678e7437e.zip |
Adding upstream version 4:24.2.0.upstream/4%24.2.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/basegfx/utils/rectcliptools.hxx')
-rw-r--r-- | include/basegfx/utils/rectcliptools.hxx | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/include/basegfx/utils/rectcliptools.hxx b/include/basegfx/utils/rectcliptools.hxx new file mode 100644 index 0000000000..af6be75bfc --- /dev/null +++ b/include/basegfx/utils/rectcliptools.hxx @@ -0,0 +1,72 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#pragma once + +#include <sal/types.h> +#include <basegfx/range/b2ibox.hxx> + + +namespace basegfx::utils +{ + namespace RectClipFlags + { + const sal_uInt32 LEFT = sal_Int32(0x01); + const sal_uInt32 RIGHT = sal_Int32(0x02); + const sal_uInt32 TOP = sal_Int32(0x04); + const sal_uInt32 BOTTOM = sal_Int32(0x08); + } + + /** Calc clip mask for Cohen-Sutherland rectangle clip + + This function returns a clip mask used for the + Cohen-Sutherland rectangle clip method, where one or more + of the lower four bits are set, if the given point is + outside one or more of the four half planes defining the + rectangle (see RectClipFlags for possible values) + */ + template< class Point, class Rect > inline + sal_uInt32 getCohenSutherlandClipFlags( const Point& rP, + const Rect& rR ) + { + // maxY | minY | maxX | minX + sal_uInt32 clip; + clip = (rP.getX() < rR.getMinX()) << 0; + clip |= (rP.getX() > rR.getMaxX()) << 1; + clip |= (rP.getY() < rR.getMinY()) << 2; + clip |= (rP.getY() > rR.getMaxY()) << 3; + return clip; + } + + /// Cohen-Sutherland mask calculation - overload for boxes. + template< class Point > inline + sal_uInt32 getCohenSutherlandClipFlags( const Point& rP, + const B2IBox& rB ) + { + // maxY | minY | maxX | minX + sal_uInt32 clip; + clip = (rP.getX() < rB.getMinX()) << 0; + clip |= (rP.getX() >= rB.getMaxX()) << 1; + clip |= (rP.getY() < rB.getMinY()) << 2; + clip |= (rP.getY() >= rB.getMaxY()) << 3; + return clip; + } +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |