include/cppcanvas/color.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
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   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
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  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #pragma once
  21
  22 #include <sal/types.h>
  23
  24 /* Definition of Color class */
  25
  26 namespace cppcanvas
  27 {
  28     /** Color in the sRGB color space, plus alpha channel
  29
  30         The four bytes of the sal_uInt32 are allocated as follows
  31         to the color channels and alpha: 0xRRGGBBAA.
  32      */
  33     typedef sal_uInt32 IntSRGBA;
  34
  35     inline sal_uInt8 getRed( IntSRGBA nCol )
  36     {
  37         return static_cast<sal_uInt8>( (nCol&0xFF000000U) >> 24U );
  38     }
  39
  40     inline sal_uInt8 getGreen( IntSRGBA nCol )
  41     {
  42         return static_cast<sal_uInt8>( (nCol&0x00FF0000U) >> 16U );
  43     }
  44
  45     inline sal_uInt8 getBlue( IntSRGBA nCol )
  46     {
  47         return static_cast<sal_uInt8>( (nCol&0x0000FF00U) >> 8U );
  48     }
  49
  50     inline sal_uInt8 getAlpha( IntSRGBA nCol )
  51     {
  52         return static_cast<sal_uInt8>( nCol&0x000000FFU );
  53     }
  54
  55     inline IntSRGBA makeColor( sal_uInt8 nRed, sal_uInt8 nGreen, sal_uInt8 nBlue, sal_uInt8 nAlpha )
  56     {
  57         return (nRed << 24U)|(nGreen << 16U)|(nBlue << 8U)|nAlpha;
  58     }
  59
  60     inline sal_Int32 makeColorARGB( sal_uInt8 nAlpha, sal_uInt8 nRed, sal_uInt8 nGreen, sal_uInt8 nBlue)
  61     {
  62         return (nAlpha << 24U)|(nRed << 16U)|(nGreen << 8U)|nBlue;
  63     }
  64
  65 }
  66
  67 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */