/*! \file color.cpp
** \brief Color Class
**
-** $Id: color.cpp,v 1.2 2005/01/23 04:03:21 darco Exp $
+** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+** Copyright (c) 2007 Chris Moore
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
#include <ETL/angle>
#include "color.h"
#include <cstdio>
+#include <sstream>
+#include <iostream>
+#include <iomanip>
#endif
+ColorReal
+Color::hex2real(String s)
+{
+ std::istringstream i(s);
+ int n;
+ i.fill('0');
+ if (!(i >> hex >> n))
+ throw String("bad conversion from hex string \"") + s + String("\"");
+ return n / 255.0f;
+}
+
+const String
+Color::real2hex(ColorReal c)
+{
+ std::ostringstream o;
+ o.width(2);
+ o.fill('0');
+ if (c<0) c = 0;
+ if (c>1) c = 1;
+ o << hex << int(c*255.0f);
+ return o.str();
+}
+
+void
+Color::set_hex(String& hex)
+{
+ value_type r, g, b;
+ try
+ {
+ if (hex.size() == 1)
+ {
+ r = hex2real(hex.substr(0,1)+hex.substr(0,1));
+ r_ = g_ = b_ = r;
+ }
+ else if (hex.size() == 3)
+ {
+ r = hex2real(hex.substr(0,1)+hex.substr(0,1));
+ g = hex2real(hex.substr(1,1)+hex.substr(1,1));
+ b = hex2real(hex.substr(2,1)+hex.substr(2,1));
+ r_ = r; g_ = g; b_ = b;
+ }
+ else if (hex.size() == 6)
+ {
+ r = hex2real(hex.substr(0,2));
+ g = hex2real(hex.substr(2,2));
+ b = hex2real(hex.substr(4,2));
+ r_ = r; g_ = g; b_ = b;
+ }
+ }
+ catch (string s)
+ {
+ printf("caught <%s>\n", s.c_str());
+ return;
+ }
+}
+
+const String
+Color::get_string(void)const
+{
+ std::ostringstream o;
+ o << std::fixed << std::setprecision(3) << "#" << get_hex() << " : " << std::setw(6) << a_;
+ return String(o.str().c_str());
+}
+
#if 0
Color&
Color::rotate_uv(const Angle& theta)const
// We add COLOR_EPSILON in order to avoid a divide-by-zero condition.
// This causes DIVIDE to bias toward positive values, but the effect is
- // really neglegable. There is a reason why we use COLOR_EPSILON--we
+ // really negligible. There is a reason why we use COLOR_EPSILON--we
// want the change to be imperceptable.
b.set_r(((b.get_r()/(a.get_r()+COLOR_EPSILON))-b.get_r())*(amount)+b.get_r());