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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the QtGui module of the Qt Toolkit.

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    13 ** contained in the Technology Preview License Agreement accompanying

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #ifndef QRGB_H

    43 #define QRGB_H

    44 

    45 #include <QtCore/qglobal.h>

    46 

    47 QT_BEGIN_HEADER

    48 

    49 QT_BEGIN_NAMESPACE

    50 

    51 QT_MODULE(Gui)

    52 

    53 typedef unsigned int QRgb;                        // RGB triplet

    54 

    55 const QRgb  RGB_MASK    = 0x00ffffff;                // masks RGB values

    56 

    57 Q_GUI_EXPORT_INLINE int qRed(QRgb rgb)                // get red part of RGB

    58 { return ((rgb >> 16) & 0xff); }

    59 

    60 Q_GUI_EXPORT_INLINE int qGreen(QRgb rgb)                // get green part of RGB

    61 { return ((rgb >> 8) & 0xff); }

    62 

    63 Q_GUI_EXPORT_INLINE int qBlue(QRgb rgb)                // get blue part of RGB

    64 { return (rgb & 0xff); }

    65 

    66 Q_GUI_EXPORT_INLINE int qAlpha(QRgb rgb)                // get alpha part of RGBA

    67 { return ((rgb >> 24) & 0xff); }

    68 

    69 Q_GUI_EXPORT_INLINE QRgb qRgb(int r, int g, int b)// set RGB value

    70 { return (0xffu << 24) | ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff); }

    71 

    72 Q_GUI_EXPORT_INLINE QRgb qRgba(int r, int g, int b, int a)// set RGBA value

    73 { return ((a & 0xff) << 24) | ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff); }

    74 

    75 Q_GUI_EXPORT_INLINE int qGray(int r, int g, int b)// convert R,G,B to gray 0..255

    76 { return (r*11+g*16+b*5)/32; }

    77 

    78 Q_GUI_EXPORT_INLINE int qGray(QRgb rgb)                // convert RGB to gray 0..255

    79 { return qGray(qRed(rgb), qGreen(rgb), qBlue(rgb)); }

    80 

    81 Q_GUI_EXPORT_INLINE bool qIsGray(QRgb rgb)

    82 { return qRed(rgb) == qGreen(rgb) && qRed(rgb) == qBlue(rgb); }

    83 

    84 QT_END_NAMESPACE

    85 

    86 QT_END_HEADER

    87 

    88 #endif // QRGB_H