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Diffstat (limited to 'basegfx/inc/basegfx/pixel/bpixel.hxx')
| -rw-r--r-- | basegfx/inc/basegfx/pixel/bpixel.hxx | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/basegfx/inc/basegfx/pixel/bpixel.hxx b/basegfx/inc/basegfx/pixel/bpixel.hxx new file mode 100644 index 000000000000..2684ff44e5d6 --- /dev/null +++ b/basegfx/inc/basegfx/pixel/bpixel.hxx @@ -0,0 +1,222 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +#ifndef _BGFX_PIXEL_BPIXEL_HXX +#define _BGFX_PIXEL_BPIXEL_HXX + +#include <sal/types.h> +#include <basegfx/numeric/ftools.hxx> +#include <basegfx/color/bcolor.hxx> + +////////////////////////////////////////////////////////////////////////////// +// predeclarations + +////////////////////////////////////////////////////////////////////////////// + +namespace basegfx +{ + class 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; } + sal_uInt32 getRedGreenBlueOpacity() const { return maPixelUnion.maCombinedRGBO.mnValue; } + + // 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; } + void setRedGreenBlueOpacity(sal_uInt32 nRedGreenBlueOpacity) { maPixelUnion.maCombinedRGBO.mnValue = nRedGreenBlueOpacity; } + void setRedGreenBlue(sal_uInt8 nR, sal_uInt8 nG, sal_uInt8 nB) { maPixelUnion.maRGBO.mnR = nR; maPixelUnion.maRGBO.mnG = nG; maPixelUnion.maRGBO.mnB = nB; } + + // comparators + bool isInvisible() const { return (0 == maPixelUnion.maRGBO.mnO); } + bool isVisible() const { return (0 != maPixelUnion.maRGBO.mnO); } + bool isEmpty() const { return isInvisible(); } + bool isUsed() const { return isVisible(); } + + 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); + } + + // empty element + static const BPixel& getEmptyBPixel(); + }; + + ////////////////////////////////////////////////////////////////////////// + // external operators + + inline BPixel minimum(const BPixel& rTupA, const BPixel& rTupB) + { + BPixel aMin( + (rTupB.getRed() < rTupA.getRed()) ? rTupB.getRed() : rTupA.getRed(), + (rTupB.getGreen() < rTupA.getGreen()) ? rTupB.getGreen() : rTupA.getGreen(), + (rTupB.getBlue() < rTupA.getBlue()) ? rTupB.getBlue() : rTupA.getBlue(), + (rTupB.getOpacity() < rTupA.getOpacity()) ? rTupB.getOpacity() : rTupA.getOpacity()); + return aMin; + } + + inline BPixel maximum(const BPixel& rTupA, const BPixel& rTupB) + { + BPixel aMax( + (rTupB.getRed() > rTupA.getRed()) ? rTupB.getRed() : rTupA.getRed(), + (rTupB.getGreen() > rTupA.getGreen()) ? rTupB.getGreen() : rTupA.getGreen(), + (rTupB.getBlue() > rTupA.getBlue()) ? rTupB.getBlue() : rTupA.getBlue(), + (rTupB.getOpacity() > rTupA.getOpacity()) ? rTupB.getOpacity() : rTupA.getOpacity()); + return aMax; + } + + 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) + { + if(rOld1 == rOld2) + { + return rOld1; + } + else + { + return BPixel( + (sal_uInt8)(((sal_uInt32)rOld1.getRed() + (sal_uInt32)rOld2.getRed()) >> 1L), + (sal_uInt8)(((sal_uInt32)rOld1.getGreen() + (sal_uInt32)rOld2.getGreen()) >> 1L), + (sal_uInt8)(((sal_uInt32)rOld1.getBlue() + (sal_uInt32)rOld2.getBlue()) >> 1L), + (sal_uInt8)(((sal_uInt32)rOld1.getOpacity() + (sal_uInt32)rOld2.getOpacity()) >> 1L)); + } + } + + inline BPixel average(const BPixel& rOld1, const BPixel& rOld2, const BPixel& rOld3) + { + if(rOld1 == rOld2 && rOld2 == rOld3) + { + return rOld1; + } + else + { + return BPixel( + (sal_uInt8)(((sal_uInt32)rOld1.getRed() + (sal_uInt32)rOld2.getRed() + (sal_uInt32)rOld3.getRed()) / 3L), + (sal_uInt8)(((sal_uInt32)rOld1.getGreen() + (sal_uInt32)rOld2.getGreen() + (sal_uInt32)rOld3.getGreen()) / 3L), + (sal_uInt8)(((sal_uInt32)rOld1.getBlue() + (sal_uInt32)rOld2.getBlue() + (sal_uInt32)rOld3.getBlue()) / 3L), + (sal_uInt8)(((sal_uInt32)rOld1.getOpacity() + (sal_uInt32)rOld2.getOpacity() + (sal_uInt32)rOld3.getOpacity()) / 3L)); + } + } +} // end of namespace basegfx + +#endif /* _BGFX_PIXEL_BPIXEL_HXX */ |