/* -*- 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_BASEGFX_PIXEL_BPIXEL_HXX #define INCLUDED_BASEGFX_PIXEL_BPIXEL_HXX #include #include #include #include namespace basegfx { class BASEGFX_DLLPUBLIC BPixel { protected: union { struct { // bitfield unsigned mnR : 8; // red intensity unsigned mnG : 8; // green intensity unsigned mnB : 8; // blue intensity unsigned mnO : 8; // opacity, 0 == full transparence } maRGBO; struct { // bitfield unsigned mnValue : 32; // all values } maCombinedRGBO; } maPixelUnion; public: BPixel() { maPixelUnion.maCombinedRGBO.mnValue = 0L; } // use explicit here to make sure everyone knows what he is doing. Values range from // 0..255 integer here. explicit BPixel(sal_uInt8 nRed, sal_uInt8 nGreen, sal_uInt8 nBlue, sal_uInt8 nOpacity) { maPixelUnion.maRGBO.mnR = nRed; maPixelUnion.maRGBO.mnG = nGreen; maPixelUnion.maRGBO.mnB = nBlue; maPixelUnion.maRGBO.mnO = nOpacity; } // constructor from BColor which uses double precision color, so change it // to local integer format. It will also be clamped here. BPixel(const BColor& rColor, sal_uInt8 nOpacity) { maPixelUnion.maRGBO.mnR = sal_uInt8((rColor.getRed() * 255.0) + 0.5); maPixelUnion.maRGBO.mnG = sal_uInt8((rColor.getGreen() * 255.0) + 0.5); maPixelUnion.maRGBO.mnB = sal_uInt8((rColor.getBlue() * 255.0) + 0.5); maPixelUnion.maRGBO.mnO = nOpacity; } // copy constructor BPixel(const BPixel& rPixel) { maPixelUnion.maCombinedRGBO.mnValue = rPixel.maPixelUnion.maCombinedRGBO.mnValue; } ~BPixel() {} // assignment operator BPixel& operator=( const BPixel& rPixel ) { maPixelUnion.maCombinedRGBO.mnValue = rPixel.maPixelUnion.maCombinedRGBO.mnValue; return *this; } // data access read sal_uInt8 getRed() const { return maPixelUnion.maRGBO.mnR; } sal_uInt8 getGreen() const { return maPixelUnion.maRGBO.mnG; } sal_uInt8 getBlue() const { return maPixelUnion.maRGBO.mnB; } sal_uInt8 getOpacity() const { return maPixelUnion.maRGBO.mnO; } // data access write void setRed(sal_uInt8 nNew) { maPixelUnion.maRGBO.mnR = nNew; } void setGreen(sal_uInt8 nNew) { maPixelUnion.maRGBO.mnG = nNew; } void setBlue(sal_uInt8 nNew) { maPixelUnion.maRGBO.mnB = nNew; } void setOpacity(sal_uInt8 nNew) { maPixelUnion.maRGBO.mnO = nNew; } // comparators bool operator==( const BPixel& rPixel ) const { return (rPixel.maPixelUnion.maCombinedRGBO.mnValue == maPixelUnion.maCombinedRGBO.mnValue); } bool operator!=( const BPixel& rPixel ) const { return (rPixel.maPixelUnion.maCombinedRGBO.mnValue != maPixelUnion.maCombinedRGBO.mnValue); } }; // external operators inline BPixel minimum(const BPixel& rTupA, const BPixel& rTupB) { return BPixel( std::min(rTupB.getRed(), rTupA.getRed()), std::min(rTupB.getGreen(), rTupA.getGreen()), std::min(rTupB.getBlue(), rTupA.getBlue()), std::min(rTupB.getOpacity(), rTupA.getOpacity())); } inline BPixel maximum(const BPixel& rTupA, const BPixel& rTupB) { return BPixel( std::max(rTupB.getRed(), rTupA.getRed()), std::max(rTupB.getGreen(), rTupA.getGreen()), std::max(rTupB.getBlue(), rTupA.getBlue()), std::max(rTupB.getOpacity(), rTupA.getOpacity())); } inline BPixel interpolate(const BPixel& rOld1, const BPixel& rOld2, double t) { if(rOld1 == rOld2) { return rOld1; } else if(0.0 >= t) { return rOld1; } else if(1.0 <= t) { return rOld2; } else { const sal_uInt32 nFactor(fround(256.0 * t)); const sal_uInt32 nNegFac(256L - nFactor); return BPixel( (sal_uInt8)(((sal_uInt32)rOld1.getRed() * nNegFac + (sal_uInt32)rOld2.getRed() * nFactor) >> 8L), (sal_uInt8)(((sal_uInt32)rOld1.getGreen() * nNegFac + (sal_uInt32)rOld2.getGreen() * nFactor) >> 8L), (sal_uInt8)(((sal_uInt32)rOld1.getBlue() * nNegFac + (sal_uInt32)rOld2.getBlue() * nFactor) >> 8L), (sal_uInt8)(((sal_uInt32)rOld1.getOpacity() * nNegFac + (sal_uInt32)rOld2.getOpacity() * nFactor) >> 8L)); } } inline BPixel average(const BPixel& rOld1, const BPixel& rOld2) { return BPixel( rOld1.getRed() == rOld2.getRed() ? rOld1.getRed() : (sal_uInt8)(((sal_uInt32)rOld1.getRed() + (sal_uInt32)rOld2.getRed()) >> 1L), rOld1.getGreen() == rOld2.getGreen() ? rOld1.getGreen() : (sal_uInt8)(((sal_uInt32)rOld1.getGreen() + (sal_uInt32)rOld2.getGreen()) >> 1L), rOld1.getBlue() == rOld2.getBlue() ? rOld1.getBlue() : (sal_uInt8)(((sal_uInt32)rOld1.getBlue() + (sal_uInt32)rOld2.getBlue()) >> 1L), rOld1.getOpacity() == rOld2.getOpacity() ? rOld1.getOpacity() : (sal_uInt8)(((sal_uInt32)rOld1.getOpacity() + (sal_uInt32)rOld2.getOpacity()) >> 1L)); } inline BPixel average(const BPixel& rOld1, const BPixel& rOld2, const BPixel& rOld3) { return BPixel( (rOld1.getRed() == rOld2.getRed() && rOld2.getRed() == rOld3.getRed()) ? rOld1.getRed() : (sal_uInt8)(((sal_uInt32)rOld1.getRed() + (sal_uInt32)rOld2.getRed() + (sal_uInt32)rOld3.getRed()) / 3L), (rOld1.getGreen() == rOld2.getGreen() && rOld2.getGreen() == rOld3.getGreen()) ? rOld1.getGreen() : (sal_uInt8)(((sal_uInt32)rOld1.getGreen() + (sal_uInt32)rOld2.getGreen() + (sal_uInt32)rOld3.getGreen()) / 3L), (rOld1.getBlue() == rOld2.getBlue() && rOld2.getBlue() == rOld3.getBlue()) ? rOld1.getBlue() : (sal_uInt8)(((sal_uInt32)rOld1.getBlue() + (sal_uInt32)rOld2.getBlue() + (sal_uInt32)rOld3.getBlue()) / 3L), (rOld1.getOpacity() == rOld2.getOpacity() && rOld2.getOpacity() == rOld3.getOpacity()) ? rOld1.getOpacity() : (sal_uInt8)(((sal_uInt32)rOld1.getOpacity() + (sal_uInt32)rOld2.getOpacity() + (sal_uInt32)rOld3.getOpacity()) / 3L)); } } // end of namespace basegfx #endif // INCLUDED_BASEGFX_PIXEL_BPIXEL_HXX /* vim:set shiftwidth=4 softtabstop=4 expandtab: */