98 lines
3.7 KiB
C++
98 lines
3.7 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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#pragma once
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#include <sal/types.h>
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#include <basegfx/color/bcolor.hxx>
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namespace basegfx
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{
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class BPixel final
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{
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union
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{
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struct
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{
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unsigned mnR : 8; // red intensity
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unsigned mnG : 8; // green intensity
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unsigned mnB : 8; // blue intensity
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unsigned mnA : 8; // opacity, 0 == full transparence
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} maRGBA;
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struct
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{
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unsigned mnValue : 32; // all values
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} maCombinedRGBA;
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} maPixelUnion;
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public:
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BPixel()
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{
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maPixelUnion.maCombinedRGBA.mnValue = 0;
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}
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// use explicit here to make sure everyone knows what he is doing. Values range from
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// 0..255 integer here.
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explicit BPixel(sal_uInt8 nRed, sal_uInt8 nGreen, sal_uInt8 nBlue, sal_uInt8 nAlpha)
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{
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maPixelUnion.maRGBA.mnR = nRed;
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maPixelUnion.maRGBA.mnG = nGreen;
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maPixelUnion.maRGBA.mnB = nBlue;
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maPixelUnion.maRGBA.mnA = nAlpha;
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}
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// constructor from BColor which uses double precision color, so change it
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// to local integer format. It will also be clamped here.
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BPixel(const BColor& rColor, sal_uInt8 nAlpha)
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{
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maPixelUnion.maRGBA.mnR = sal_uInt8((rColor.getRed() * 255.0) + 0.5);
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maPixelUnion.maRGBA.mnG = sal_uInt8((rColor.getGreen() * 255.0) + 0.5);
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maPixelUnion.maRGBA.mnB = sal_uInt8((rColor.getBlue() * 255.0) + 0.5);
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maPixelUnion.maRGBA.mnA = nAlpha;
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}
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// data access read
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sal_uInt8 getRed() const { return maPixelUnion.maRGBA.mnR; }
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sal_uInt8 getGreen() const { return maPixelUnion.maRGBA.mnG; }
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sal_uInt8 getBlue() const { return maPixelUnion.maRGBA.mnB; }
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sal_uInt8 getAlpha() const { return maPixelUnion.maRGBA.mnA; }
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// data access write
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void setRed(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnR = nNew; }
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void setGreen(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnG = nNew; }
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void setBlue(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnB = nNew; }
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void setAlpha(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnA = nNew; }
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// comparators
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bool operator==( const BPixel& rPixel ) const
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{
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return (rPixel.maPixelUnion.maCombinedRGBA.mnValue == maPixelUnion.maCombinedRGBA.mnValue);
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}
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bool operator!=( const BPixel& rPixel ) const
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{
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return (rPixel.maPixelUnion.maCombinedRGBA.mnValue != maPixelUnion.maCombinedRGBA.mnValue);
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}
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};
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} // end of namespace basegfx
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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