8792ec7b21
Conflicts: include/framework/preventduplicateinteraction.hxx include/sfx2/sfxbasecontroller.hxx include/sfx2/sfxbasemodel.hxx include/toolkit/awt/vclxtabpagemodel.hxx include/vcl/field.hxx include/vcl/settings.hxx Change-Id: Ibccf9f88c68267a3d7e656012b51eaf644c418c2 Reviewed-on: https://gerrit.libreoffice.org/8272 Reviewed-by: Caolán McNamara <caolanm@redhat.com> Tested-by: Caolán McNamara <caolanm@redhat.com>
97 lines
3.8 KiB
C++
97 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_BASEGFX_TOOLS_RECTCLIPTOOLS_HXX
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#define INCLUDED_BASEGFX_TOOLS_RECTCLIPTOOLS_HXX
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#include <sal/types.h>
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#include <basegfx/range/b2ibox.hxx>
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namespace basegfx
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{
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namespace tools
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{
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namespace RectClipFlags
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{
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static const sal_uInt32 LEFT = (sal_Int32)0x01;
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static const sal_uInt32 RIGHT = (sal_Int32)0x02;
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static const sal_uInt32 TOP = (sal_Int32)0x04;
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static const sal_uInt32 BOTTOM = (sal_Int32)0x08;
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}
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/** Calc clip mask for Cohen-Sutherland rectangle clip
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This function returns a clip mask used for the
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Cohen-Sutherland rectangle clip method, where one or more
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of the lower four bits are set, if the given point is
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outside one or more of the four half planes defining the
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rectangle (see RectClipFlags for possible values)
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*/
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template< class Point, class Rect > inline
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sal_uInt32 getCohenSutherlandClipFlags( const Point& rP,
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const Rect& rR )
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{
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// maxY | minY | maxX | minX
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sal_uInt32 clip = (rP.getX() < rR.getMinX()) << 0;
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clip |= (rP.getX() > rR.getMaxX()) << 1;
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clip |= (rP.getY() < rR.getMinY()) << 2;
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clip |= (rP.getY() > rR.getMaxY()) << 3;
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return clip;
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}
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/// Cohen-Sutherland mask calculation - overload for boxes.
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template< class Point > inline
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sal_uInt32 getCohenSutherlandClipFlags( const Point& rP,
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const B2IBox& rB )
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{
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// maxY | minY | maxX | minX
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sal_uInt32 clip = (rP.getX() < rB.getMinX()) << 0;
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clip |= (rP.getX() >= rB.getMaxX()) << 1;
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clip |= (rP.getY() < rB.getMinY()) << 2;
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clip |= (rP.getY() >= rB.getMaxY()) << 3;
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return clip;
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}
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/** Determine number of clip planes hit by given clip mask
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This method returns the number of one bits in the four
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least significant bits of the argument, which amounts to
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the number of clip planes hit within the
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getCohenSutherlandClipFlags() method.
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*/
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inline sal_uInt32 getNumberOfClipPlanes( sal_uInt32 nFlags )
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{
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// classic bit count algo, see e.g. Reingold, Nievergelt,
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// Deo: Combinatorial Algorithms, Theory and Practice,
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// Prentice-Hall 1977
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nFlags = (nFlags & 0x05) + ((nFlags >> 1) & 0x05);
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nFlags = (nFlags & 0x03) + (nFlags >> 2); // no need for &
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// 0x03, can't
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// overflow
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return nFlags;
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}
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}
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}
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#endif // INCLUDED_BASEGFX_TOOLS_RECTCLIPTOOLS_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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