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/* -*- 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 .
*/
#ifndef INCLUDED_VCL_INC_IMPOCTREE_HXX
#define INCLUDED_VCL_INC_IMPOCTREE_HXX
#include <vcl/BitmapColor.hxx>
class ImpErrorQuad
{
sal_Int16 nRed;
sal_Int16 nGreen;
sal_Int16 nBlue;
public:
ImpErrorQuad()
: nRed(0)
, nGreen(0)
, nBlue(0)
{
}
ImpErrorQuad(const BitmapColor& rColor)
: nRed(rColor.GetRed() << 5)
, nGreen(rColor.GetGreen() << 5)
, nBlue(rColor.GetBlue() << 5)
{
}
inline void operator=(const BitmapColor& rColor);
inline ImpErrorQuad& operator-=(const BitmapColor& rColor);
inline void ImplAddColorError1(const ImpErrorQuad& rErrQuad);
inline void ImplAddColorError3(const ImpErrorQuad& rErrQuad);
inline void ImplAddColorError5(const ImpErrorQuad& rErrQuad);
inline void ImplAddColorError7(const ImpErrorQuad& rErrQuad);
inline BitmapColor ImplGetColor() const;
};
inline void ImpErrorQuad::operator=(const BitmapColor& rColor)
{
nRed = rColor.GetRed() << 5;
nGreen = rColor.GetGreen() << 5;
nBlue = rColor.GetBlue() << 5;
}
inline ImpErrorQuad& ImpErrorQuad::operator-=(const BitmapColor& rColor)
{
nRed -= rColor.GetRed() << 5;
nGreen -= rColor.GetGreen() << 5;
nBlue -= rColor.GetBlue() << 5;
return *this;
}
inline void ImpErrorQuad::ImplAddColorError1(const ImpErrorQuad& rErrQuad)
{
nRed += rErrQuad.nRed >> 4;
nGreen += rErrQuad.nGreen >> 4;
nBlue += rErrQuad.nBlue >> 4;
}
inline void ImpErrorQuad::ImplAddColorError3(const ImpErrorQuad& rErrQuad)
{
nRed += rErrQuad.nRed * 3L >> 4;
nGreen += rErrQuad.nGreen * 3L >> 4;
nBlue += rErrQuad.nBlue * 3L >> 4;
}
inline void ImpErrorQuad::ImplAddColorError5(const ImpErrorQuad& rErrQuad)
{
nRed += rErrQuad.nRed * 5L >> 4;
nGreen += rErrQuad.nGreen * 5L >> 4;
nBlue += rErrQuad.nBlue * 5L >> 4;
}
inline void ImpErrorQuad::ImplAddColorError7(const ImpErrorQuad& rErrQuad)
{
nRed += rErrQuad.nRed * 7L >> 4;
nGreen += rErrQuad.nGreen * 7L >> 4;
nBlue += rErrQuad.nBlue * 7L >> 4;
}
inline BitmapColor ImpErrorQuad::ImplGetColor() const
{
return BitmapColor(std::clamp(nRed, sal_Int16(0), sal_Int16(8160)) >> 5,
std::clamp(nGreen, sal_Int16(0), sal_Int16(8160)) >> 5,
std::clamp(nBlue, sal_Int16(0), sal_Int16(8160)) >> 5);
}
#endif // INCLUDED_VCL_INC_IMPOCTREE_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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