/* -*- 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 <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 * 3 L >> 4 ;
nGreen += rErrQuad.nGreen * 3 L >> 4 ;
nBlue += rErrQuad.nBlue * 3 L >> 4 ;
}
inline void ImpErrorQuad::ImplAddColorError5(const ImpErrorQuad& rErrQuad)
{
nRed += rErrQuad.nRed * 5 L >> 4 ;
nGreen += rErrQuad.nGreen * 5 L >> 4 ;
nBlue += rErrQuad.nBlue * 5 L >> 4 ;
}
inline void ImpErrorQuad::ImplAddColorError7(const ImpErrorQuad& rErrQuad)
{
nRed += rErrQuad.nRed * 7 L >> 4 ;
nGreen += rErrQuad.nGreen * 7 L >> 4 ;
nBlue += rErrQuad.nBlue * 7 L >> 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 );
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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