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| -rw-r--r-- | include/basegfx/pixel/bpixel.hxx | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/include/basegfx/pixel/bpixel.hxx b/include/basegfx/pixel/bpixel.hxx new file mode 100644 index 000000000..50209ec2c --- /dev/null +++ b/include/basegfx/pixel/bpixel.hxx @@ -0,0 +1,98 @@ +/* -*- 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 <sal/types.h> +#include <basegfx/color/bcolor.hxx> + +namespace basegfx +{ + class BPixel final + { + union + { + struct + { + unsigned mnR : 8; // red intensity + unsigned mnG : 8; // green intensity + unsigned mnB : 8; // blue intensity + unsigned mnA : 8; // opacity, 0 == full transparence + } maRGBA; + + struct + { + unsigned mnValue : 32; // all values + } maCombinedRGBA; + } maPixelUnion; + + public: + BPixel() + { + maPixelUnion.maCombinedRGBA.mnValue = 0; + } + + // 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 nAlpha) + { + maPixelUnion.maRGBA.mnR = nRed; + maPixelUnion.maRGBA.mnG = nGreen; + maPixelUnion.maRGBA.mnB = nBlue; + maPixelUnion.maRGBA.mnA = nAlpha; + } + + // 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 nAlpha) + { + maPixelUnion.maRGBA.mnR = sal_uInt8((rColor.getRed() * 255.0) + 0.5); + maPixelUnion.maRGBA.mnG = sal_uInt8((rColor.getGreen() * 255.0) + 0.5); + maPixelUnion.maRGBA.mnB = sal_uInt8((rColor.getBlue() * 255.0) + 0.5); + maPixelUnion.maRGBA.mnA = nAlpha; + } + + // data access read + sal_uInt8 getRed() const { return maPixelUnion.maRGBA.mnR; } + sal_uInt8 getGreen() const { return maPixelUnion.maRGBA.mnG; } + sal_uInt8 getBlue() const { return maPixelUnion.maRGBA.mnB; } + sal_uInt8 getAlpha() const { return maPixelUnion.maRGBA.mnA; } + + // data access write + void setRed(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnR = nNew; } + void setGreen(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnG = nNew; } + void setBlue(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnB = nNew; } + void setAlpha(sal_uInt8 nNew) { maPixelUnion.maRGBA.mnA = nNew; } + + // comparators + bool operator==( const BPixel& rPixel ) const + { + return (rPixel.maPixelUnion.maCombinedRGBA.mnValue == maPixelUnion.maCombinedRGBA.mnValue); + } + + bool operator!=( const BPixel& rPixel ) const + { + return (rPixel.maPixelUnion.maCombinedRGBA.mnValue != maPixelUnion.maCombinedRGBA.mnValue); + } + }; + + +} // end of namespace basegfx + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |