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//------------------------------------------------------------------------
// Packed RGB Colors
//------------------------------------------------------------------------
//
// Z C++ Lib (C) 2001-2002 Andrew Apted
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
//------------------------------------------------------------------------
using namespace std;
#include "z_config.h"
#include "z_rgb.h"
float PackCol::Intensity() const
{
float r2 = r / 255.0;
float g2 = g / 255.0;
float b2 = b / 255.0;
return sqrt(r2 * r2 * 0.30 + g2 * g2 * 0.50 + b2 * b2 * 0.20);
}
PackCol& PackCol::ToHue()
{
int maxval = MAX(r, MAX(g, b));
// prevent division by zero (black --> black)
if (maxval != 0)
{
r = int(r) * 255 / maxval;
g = int(g) * 255 / maxval;
b = int(b) * 255 / maxval;
}
a = 255;
return *this;
}
const PackCol PackCol::BLACK (0, 0, 0);
const PackCol PackCol::BLUE (0, 0, 255);
const PackCol PackCol::CYAN (0, 255, 255);
const PackCol PackCol::GREEN (0, 255, 0);
const PackCol PackCol::RED (255, 0, 0);
const PackCol PackCol::PURPLE (255, 0, 255);
const PackCol PackCol::YELLOW (255, 255, 0);
const PackCol PackCol::WHITE (255, 255, 255);
const PackCol PackCol::D_GREY (63, 63, 63);
const PackCol PackCol::M_GREY (127, 127, 127);
const PackCol PackCol::L_GREY (191, 191, 191);
const PackCol PackCol::ORANGE (255, 191, 0);
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