include/cppcanvas/color.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   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
  13  *   with this work for additional information regarding copyright
  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 #ifndef INCLUDED_CPPCANVAS_COLOR_HXX
  21 #define INCLUDED_CPPCANVAS_COLOR_HXX
  22
  23 #include <com/sun/star/uno/Sequence.hxx>
  24 #include <memory>
  25
  26 /* Definition of Color class */
  27
  28 namespace cppcanvas
  29 {
  30     class Color
  31     {
  32     public:
  33         /** Color in the sRGB color space, plus alpha channel
  34
  35             The four bytes of the sal_uInt32 are allocated as follows
  36             to the color channels and alpha: 0xRRGGBBAA.
  37          */
  38         typedef sal_uInt32 IntSRGBA;
  39
  40         virtual ~Color() {}
  41
  42         virtual css::uno::Sequence< double >   getDeviceColor( IntSRGBA aSRGBA ) const = 0;
  43     };
  44
  45     typedef std::shared_ptr< ::cppcanvas::Color > ColorSharedPtr;
  46
  47     inline sal_uInt8 getRed( Color::IntSRGBA nCol )
  48     {
  49         return static_cast<sal_uInt8>( (nCol&0xFF000000U) >> 24U );
  50     }
  51
  52     inline sal_uInt8 getGreen( Color::IntSRGBA nCol )
  53     {
  54         return static_cast<sal_uInt8>( (nCol&0x00FF0000U) >> 16U );
  55     }
  56
  57     inline sal_uInt8 getBlue( Color::IntSRGBA nCol )
  58     {
  59         return static_cast<sal_uInt8>( (nCol&0x0000FF00U) >> 8U );
  60     }
  61
  62     inline sal_uInt8 getAlpha( Color::IntSRGBA nCol )
  63     {
  64         return static_cast<sal_uInt8>( nCol&0x000000FFU );
  65     }
  66
  67     inline Color::IntSRGBA makeColor( sal_uInt8 nRed, sal_uInt8 nGreen, sal_uInt8 nBlue, sal_uInt8 nAlpha )
  68     {
  69         return (nRed << 24U)|(nGreen << 16U)|(nBlue << 8U)|(nAlpha);
  70     }
  71
  72     inline sal_Int32 makeColorARGB( sal_uInt8 nAlpha, sal_uInt8 nRed, sal_uInt8 nGreen, sal_uInt8 nBlue)
  73     {
  74         return (nAlpha << 24U)|(nRed << 16U)|(nGreen << 8U)|(nBlue);
  75     }
  76
  77 }
  78
  79 #endif // INCLUDED_CPPCANVAS_COLOR_HXX
  80
  81 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */