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This is the verbatim text of the qcolor.h include file. It is provided only for illustration; the copyright remains with Trolltech.
/****************************************************************************
** $Id: qt/qcolor.h 3.2.0b2 edited May 13 09:08 $
**
** Definition of QColor class
**
** Created : 940112
**
** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
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** information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
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**********************************************************************/
#ifndef QCOLOR_H
#define QCOLOR_H
#ifndef QT_H
#include "qwindowdefs.h"
#include "qstringlist.h"
#endif // QT_H
const QRgb RGB_MASK = 0x00ffffff; // masks RGB values
Q_EXPORT inline int qRed( QRgb rgb ) // get red part of RGB
{ return (int)((rgb >> 16) & 0xff); }
Q_EXPORT inline int qGreen( QRgb rgb ) // get green part of RGB
{ return (int)((rgb >> 8) & 0xff); }
Q_EXPORT inline int qBlue( QRgb rgb ) // get blue part of RGB
{ return (int)(rgb & 0xff); }
Q_EXPORT inline int qAlpha( QRgb rgb ) // get alpha part of RGBA
{ return (int)((rgb >> 24) & 0xff); }
Q_EXPORT inline QRgb qRgb( int r, int g, int b )// set RGB value
{ return (0xff << 24) | ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff); }
Q_EXPORT inline QRgb qRgba( int r, int g, int b, int a )// set RGBA value
{ return ((a & 0xff) << 24) | ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff); }
Q_EXPORT inline int qGray( int r, int g, int b )// convert R,G,B to gray 0..255
{ return (r*11+g*16+b*5)/32; }
Q_EXPORT inline int qGray( QRgb rgb ) // convert RGB to gray 0..255
{ return qGray( qRed(rgb), qGreen(rgb), qBlue(rgb) ); }
class Q_EXPORT QColor
{
public:
enum Spec { Rgb, Hsv };
QColor();
QColor( int r, int g, int b );
QColor( int x, int y, int z, Spec );
QColor( QRgb rgb, uint pixel=0xffffffff);
QColor( const QString& name );
QColor( const char *name );
QColor( const QColor & );
QColor &operator=( const QColor & );
bool isValid() const;
bool isDirty() const;
QString name() const;
void setNamedColor( const QString& name );
QRgb rgb() const;
void setRgb( int r, int g, int b );
void setRgb( QRgb rgb );
void getRgb( int *r, int *g, int *b ) const { rgb( r, g, b ); }
void rgb( int *r, int *g, int *b ) const; // obsolete
int red() const;
int green() const;
int blue() const;
void setHsv( int h, int s, int v );
void getHsv( int *h, int *s, int *v ) const { hsv( h, s, v ); }
void hsv( int *h, int *s, int *v ) const; // obsolete
void getHsv( int &h, int &s, int &v ) const { hsv( &h, &s, &v ); } // obsolete
QColor light( int f = 150 ) const;
QColor dark( int f = 200 ) const;
bool operator==( const QColor &c ) const;
bool operator!=( const QColor &c ) const;
uint alloc();
uint pixel() const;
#if defined(Q_WS_X11)
// ### in 4.0, make this take a default argument of -1 for default screen?
uint alloc( int screen );
uint pixel( int screen ) const;
#endif
static int maxColors();
static int numBitPlanes();
static int enterAllocContext();
static void leaveAllocContext();
static int currentAllocContext();
static void destroyAllocContext( int );
#if defined(Q_WS_WIN)
static const QRgb* palette( int* numEntries = 0 );
static int setPaletteEntries( const QRgb* entries, int numEntries,
int base = -1 );
static HPALETTE hPal() { return hpal; }
static uint realizePal( QWidget * );
#endif
static void initialize();
static void cleanup();
#ifndef QT_NO_STRINGLIST
static QStringList colorNames();
#endif
enum { Dirt = 0x44495254, Invalid = 0x49000000 };
private:
void setSystemNamedColor( const QString& name );
void setPixel( uint pixel );
static void initGlobalColors();
static uint argbToPix32(QRgb);
static QColor* globalColors();
static bool color_init;
static bool globals_init;
#if defined(Q_WS_WIN)
static HPALETTE hpal;
#endif
static enum ColorModel { d8, d32 } colormodel;
union {
QRgb argb;
struct D8 {
QRgb argb;
uchar pix;
uchar invalid;
uchar dirty;
uchar direct;
} d8;
struct D32 {
QRgb argb;
uint pix;
bool invalid() const { return argb == QColor::Invalid && pix == QColor::Dirt; }
bool probablyDirty() const { return pix == QColor::Dirt; }
} d32;
} d;
};
inline QColor::QColor()
{ d.d32.argb = Invalid; d.d32.pix = Dirt; }
inline QColor::QColor( int r, int g, int b )
{ setRgb( r, g, b ); }
inline QRgb QColor::rgb() const
{ return d.argb; }
inline int QColor::red() const
{ return qRed(d.argb); }
inline int QColor::green() const
{ return qGreen(d.argb); }
inline int QColor::blue() const
{ return qBlue(d.argb); }
inline bool QColor::isValid() const
{
if ( colormodel == d8 )
return !d.d8.invalid;
else
return !d.d32.invalid();
}
inline bool QColor::operator==( const QColor &c ) const
{
return d.argb == c.d.argb && isValid() == c.isValid();
}
inline bool QColor::operator!=( const QColor &c ) const
{
return !operator==(c);
}
/*****************************************************************************
QColor stream functions
*****************************************************************************/
#ifndef QT_NO_DATASTREAM
Q_EXPORT QDataStream &operator<<( QDataStream &, const QColor & );
Q_EXPORT QDataStream &operator>>( QDataStream &, QColor & );
#endif
#endif // QCOLOR_H
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