This is the verbatim text of the qcolor.h include file. It is is provided only for illustration; the copyright remains with Troll Tech.


/****************************************************************************
** $Id: qcolor.h,v 1.14 1995/05/08 02:34:49 hanord Exp $
**
** Definition of QColor class
**
** Author  : Haavard Nord
** Created : 940112
**
** Copyright (C) 1994,1995 by Troll Tech AS.  All rights reserved.
**
*****************************************************************************/

#ifndef QCOLOR_H
#define QCOLOR_H

#include "qwindefs.h"


const ulong RGB_DIRTY   = 0x80000000;           // flags unset color
const ulong RGB_INVALID = 0x40000000;           // flags invalid color
const ulong RGB_MASK    = 0x00ffffff;           // masks RGB values


inline int   QRED( ulong rgb )                  // get red part of RGB
{ return (int)(rgb & 0xff); }

inline int   QGREEN( ulong rgb )                // get green part of RGB
{ return (int)((rgb >> 8) & 0xff); }

inline int   QBLUE( ulong rgb )                 // get blue part of RGB
{ return (int)((rgb >> 16) & 0xff); }

inline ulong QRGB( int r, int g, int b )        // set RGB value
{ return (uchar)r | ((ushort)g << 8) | ((ulong)b << 16); }

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; }

inline int QGRAY( ulong rgb )                   // convert RGB to gray 0..255
{ return QGRAY( QRED(rgb), QGREEN(rgb), QBLUE(rgb) ); }


class QColor                                    // color class
{
public:
    QColor();                                   // default RGB=0,0,0
    QColor( int r, int g, int b );              // specify RGB
    QColor( ulong rgb, ulong pix=0xffffffff) ;  // specify RGB and/or pixel
    QColor( const char *name );                 // load color from database
    QColor( const QColor & );                   // copy color

    static bool lazyAlloc()     { return lalloc; }
    static void setLazyAlloc( bool );           // enable/disable lazy alloc

    void   alloc();                             // allocate color

    void   setNamedColor( const char *name );   // load color from database

    void   getRGB( int *r, int *g, int *b ) const; // get RGB value
    ulong  getRGB() const { return rgb & RGB_MASK; }
    void   setRGB( int r, int g, int b );       // set RGB value
    void   setRGB( ulong rgb );

    int    red()    const { return QRED(rgb); }
    int    green()  const { return QGREEN(rgb); }
    int    blue()   const { return QBLUE(rgb); }

    void   getHSV( int *h, int *s, int *v ) const; // get HSV value
    void   setHSV( int h, int s, int v );       // set HSV value
    
    bool   isValid()const { return (rgb & RGB_INVALID) == 0; }
    bool   isDirty()const { return (rgb & RGB_DIRTY) == RGB_DIRTY; }

    QColor light( int f = 112 ) const;          // get lighter color
    QColor dark( int f = 200 )  const;          // get darker color

    ulong  pixel()  const;                      // get pixel value

    bool   operator==( const QColor &c ) const;
    bool   operator!=( const QColor &c ) const;

#if defined(_WS_WIN_)
    static HANDLE hPal()  { return hpal; }
    static uint   realizePal( QWidget * );
#endif

    static void initialize();                   // initialize color system
    static void cleanup();                      // cleanup color system

private:
    static bool lalloc;
#if defined(_WS_WIN_)
    static HANDLE hpal;
    ulong  pix;
#elif defined(_WS_PM_)
    ulong  pix;
#elif defined(_WS_X11_)
    ulong  pix;
#endif
    ulong  rgb;                                 // RGB value
};


#if defined(_WS_WIN_) || defined(_WS_PM_)
inline ulong QColor::pixel() const
{
    return pix;
}
#else
inline ulong QColor::pixel() const
{
    if ( isDirty() )
        ((QColor*)this)->alloc();
    return pix;
}
#endif


inline bool QColor::operator==( const QColor &c ) const
{
    return rgb == c.rgb;
}

inline bool QColor::operator!=( const QColor &c ) const
{
    return rgb != c.rgb;
}


// --------------------------------------------------------------------------
// Global colors
//

extern const QColor color0;
extern const QColor color1;
extern const QColor black;
extern const QColor white;
extern const QColor darkGray;
extern const QColor gray;
extern const QColor lightGray;
extern const QColor red;
extern const QColor green;
extern const QColor blue;
extern const QColor cyan;
extern const QColor magenta;
extern const QColor yellow;
extern const QColor darkRed;
extern const QColor darkGreen;
extern const QColor darkBlue;
extern const QColor darkCyan;
extern const QColor darkMagenta;
extern const QColor darkYellow;


// --------------------------------------------------------------------------
// QColor stream functions
//

QDataStream &operator<<( QDataStream &, const QColor & );
QDataStream &operator>>( QDataStream &, QColor & );


#endif // QCOLOR_H


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