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/*
* mogltk
* Copyright (C) 1999-2004 Nicolas "Pixel" Noble
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* $Id: mcolor.cc,v 1.11 2007-07-27 14:10:20 pixel Exp $ */
#include <SDL.h>
#include <SDL_opengl.h>
#include "engine.h"
#include "mcolor.h"
Color mogltk::ColorP::Min(0, 0, 0, 0), mogltk::ColorP::Max = WHITE;
mogltk::ColorP::ColorP(const Color & ac) : c(ac) {
}
mogltk::ColorP::ColorP(Uint8 ar, Uint8 ag, Uint8 ab, Uint8 aa) : c(ar, ag, ab, aa) {
}
void mogltk::ColorP::Bind() {
glColor4d((double) MIN(MAX(c.R, Min.R), Max.R) / 255, (double) MIN(MAX(c.G, Min.G), Max.G) / 255, (double) MIN(MAX(c.B, Min.B), Max.B) / 255, (double) MIN(MAX(c.A, Min.A), Max.A) / 255);
}
Uint32 mogltk::ColorP::toSDL(SDL_PixelFormat * f) {
if (!f)
f = mogltk::engine::base_o->getsurface()->format;
return SDL_MapRGBA(f, MIN(MAX(c.R, Min.R), Max.R), MIN(MAX(c.G, Min.G), Max.G), MIN(MAX(c.B, Min.B), Max.B), MIN(MAX(c.A, Min.A), Max.A));
}
void mogltk::ColorP::fromSDL(Uint32 p, SDL_PixelFormat * f) {
if (!f)
f = mogltk::engine::base_o->getsurface()->format;
SDL_GetRGBA(p, f, &c.R, &c.G, &c.B, &c.A);
}
void mogltk::ColorP::fromHSV(double H, double S, double V) {
H = H / 60.0;
int Hi = ((int) H) % 6;
double f = H - Hi;
double p = V * (1 - S);
double q = V * (1 - f * S);
double t = V * (1 - (1 - f) * S);
double R, G, B;
switch (Hi) {
case 0: R = V; G = t; B = p; break;
case 1: R = q; G = V; B = p; break;
case 2: R = p; G = V; B = t; break;
case 3: R = p; G = q; B = V; break;
case 4: R = t; G = p; B = V; break;
case 5: R = V; G = p; B = q; break;
}
c.R = R * 255; c.G = G * 255; c.B = B * 255;
}
void mogltk::ColorP::toHSV(double * H, double * S, double * V) {
double R, G, B, cMAX, cMIN;
R = ((double) c.R) / 255;
G = ((double) c.G) / 255;
B = ((double) c.B) / 255;
cMAX = MAX(MAX(R, G), B);
cMIN = MIN(MIN(R, G), B);
if (cMAX == cMIN) {
*H = 0;
*S = 0;
*V = cMAX;
return;
}
if ((cMAX == R) && (G >= B)) {
*H = 60 * ((G - B) / (cMAX - cMIN));
} else if ((cMAX == R) && (G < B)) {
*H = 60 * ((G - B) / (cMAX - cMIN)) + 360;
} else if (cMAX == G) {
*H = 60 * ((B - R) / (cMAX - cMIN)) + 120;
} else {
*H = 60 * ((R - G) / (cMAX - cMIN)) + 240;
}
if (cMAX == 0) {
*S = 0;
} else {
*S = (cMAX - cMIN) / cMAX;
}
*V = cMAX;
}
void mogltk::ColorP::Norm() {
c.R = MIN(MAX(c.R, Min.R), Max.R);
c.G = MIN(MAX(c.R, Min.G), Max.G);
c.B = MIN(MAX(c.R, Min.B), Max.B);
c.A = MIN(MAX(c.R, Min.A), Max.A);
}
bool mogltk::ColorP::operator==(const ColorP & nc) {
return c == nc.c;
}
Color * mogltk::ColorP::operator->() {
return &c;
}
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