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# qrgb.h

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    00001 /****************************************************************************
    00002 **
    00003 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
    00004 ** All rights reserved.
    00005 ** Contact: Nokia Corporation (qt-info@nokia.com)
    00006 **
    00007 ** This file is part of the QtGui module of the Qt Toolkit.
    00008 **
    00009 ** $QT_BEGIN_LICENSE:LGPL$
    00010 ** Commercial Usage
    00011 ** Licensees holding valid Qt Commercial licenses may use this file in
    00012 ** accordance with the Qt Commercial License Agreement provided with the
    00013 ** Software or, alternatively, in accordance with the terms contained in
    00014 ** a written agreement between you and Nokia.
    00015 **
    00016 ** GNU Lesser General Public License Usage
    00017 ** Alternatively, this file may be used under the terms of the GNU Lesser
    00018 ** General Public License version 2.1 as published by the Free Software
    00019 ** Foundation and appearing in the file LICENSE.LGPL included in the
    00020 ** packaging of this file.  Please review the following information to
    00021 ** ensure the GNU Lesser General Public License version 2.1 requirements
    00022 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    00023 **
    00024 ** In addition, as a special exception, Nokia gives you certain additional
    00025 ** rights.  These rights are described in the Nokia Qt LGPL Exception
    00026 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this module.
    00027 **
    00028 ** GNU General Public License Usage
    00029 ** Alternatively, this file may be used under the terms of the GNU
    00030 ** General Public License version 3.0 as published by the Free Software
    00031 ** Foundation and appearing in the file LICENSE.GPL included in the
    00032 ** packaging of this file.  Please review the following information to
    00033 ** ensure the GNU General Public License version 3.0 requirements will be
    00034 ** met: http://www.gnu.org/copyleft/gpl.html.
    00035 **
    00036 ** If you have questions regarding the use of this file, please contact
    00037 ** Nokia at qt-info@nokia.com.
    00038 ** $QT_END_LICENSE$
    00039 **
    00040 ****************************************************************************/
    00041
    00042 #ifndef QRGB_H
    00043 #define QRGB_H
    00044
    00045 #include <QtCore/qglobal.h>
    00046
    00047 QT_BEGIN_HEADER
    00048
    00049 QT_BEGIN_NAMESPACE
    00050
    00051 QT_MODULE(Gui)
    00052
    00053 typedef unsigned int QRgb;                        // RGB triplet
    00054
    00055 const QRgb  RGB_MASK    = 0x00ffffff;                // masks RGB values
    00056
    00057 Q_GUI_EXPORT_INLINE int qRed(QRgb rgb)                // get red part of RGB
    00058 { return ((rgb >> 16) & 0xff); }
    00059
    00060 Q_GUI_EXPORT_INLINE int qGreen(QRgb rgb)                // get green part of RGB
    00061 { return ((rgb >> 8) & 0xff); }
    00062
    00063 Q_GUI_EXPORT_INLINE int qBlue(QRgb rgb)                // get blue part of RGB
    00064 { return (rgb & 0xff); }
    00065
    00066 Q_GUI_EXPORT_INLINE int qAlpha(QRgb rgb)                // get alpha part of RGBA
    00067 { return rgb >> 24; }
    00068
    00069 Q_GUI_EXPORT_INLINE QRgb qRgb(int r, int g, int b)// set RGB value
    00070 { return (0xffu << 24) | ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff); }
    00071
    00072 Q_GUI_EXPORT_INLINE QRgb qRgba(int r, int g, int b, int a)// set RGBA value
    00073 { return ((a & 0xff) << 24) | ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff); }
    00074
    00075 Q_GUI_EXPORT_INLINE int qGray(int r, int g, int b)// convert R,G,B to gray 0..255
    00076 { return (r*11+g*16+b*5)/32; }
    00077
    00078 Q_GUI_EXPORT_INLINE int qGray(QRgb rgb)                // convert RGB to gray 0..255
    00079 { return qGray(qRed(rgb), qGreen(rgb), qBlue(rgb)); }
    00080
    00081 Q_GUI_EXPORT_INLINE bool qIsGray(QRgb rgb)
    00082 { return qRed(rgb) == qGreen(rgb) && qRed(rgb) == qBlue(rgb); }
    00083
    00084 QT_END_NAMESPACE
    00085
    00086 QT_END_HEADER
    00087
    00088 #endif // QRGB_H