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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
// Color.hh for Blackbox - an X11 Window manager
// Copyright (c) 2001 - 2005 Sean 'Shaleh' Perry <shaleh at debian.org>
// Copyright (c) 1997 - 2000, 2002 - 2005
// Bradley T Hughes <bhughes at trolltech.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
#ifndef __Color_hh
#define __Color_hh
#include <string>
namespace bt {
// forward declarations
class Display;
class PenCache;
/*
The color object. Colors are stored in rgb format (screen
independent). Screen dependent pixel values can be obtained using
the pixel() function.
*/
class Color {
public:
/*
Frees unused colors on all screens.
*/
static void clearCache(void);
/*
Returns the named color on the specified display and screen. If
the color couldn't be found, an invalid color is returned.
*/
static Color namedColor(const Display &display, unsigned int screen,
const std::string &colorname);
explicit inline Color(int r = -1, int g = -1, int b = -1)
: _red(r), _green(g), _blue(b),
_screen(~0u), _pixel(0ul)
{ }
inline Color(const Color &c)
: _red(c._red), _green(c._green), _blue(c._blue),
_screen(~0u), _pixel(0ul)
{ }
inline ~Color(void)
{ deallocate(); }
inline int red(void) const
{ return _red; }
inline int green(void) const
{ return _green; }
inline int blue(void) const
{ return _blue; }
inline void setRGB(int r, int g, int b)
{ deallocate(); _red = r; _green = g; _blue = b; }
unsigned long pixel(unsigned int screen) const;
inline bool valid(void) const
{ return _red != -1 && _green != -1 && _blue != -1; }
// operators
inline Color &operator=(const Color &c)
{ setRGB(c._red, c._green, c._blue); return *this; }
inline bool operator==(const Color &c) const
{ return _red == c._red && _green == c._green && _blue == c._blue; }
inline bool operator!=(const Color &c) const
{ return !operator==(c); }
private:
void deallocate(void);
int _red, _green, _blue;
mutable unsigned int _screen;
mutable unsigned long _pixel;
friend class PenCache;
};
} // namespace bt
#endif // __Color_hh
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