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/*
* seduservice.c: A plugin for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
* $Id: seduservice.c,v 1.3 2012/11/22 18:02:59 wendel Exp $
*/
#include <math.h>
#include "seduservice.h"
#include "common.h"
//***************************************************************************
// View Modes
//***************************************************************************
const char* cSeduService::viewModes[] =
{
"atmo",
"fixed color",
"rainbow",
"moving color wheel",
"static color wheel",
"black",
"detached",
0
};
const char* cSeduService::toName(ViewMode vm)
{
return viewModes[vm];
}
//***************************************************************************
// Color conversion functions
//***************************************************************************
void cSeduService::rgb2hsv(int r, int g, int b, double* h, double* s, double* v)
{
double minC, maxC, delta, rc, gc, bc;
rc = (double)r / 255.0;
gc = (double)g / 255.0;
bc = (double)b / 255.0;
maxC = max(rc, max(gc, bc));
minC = min(rc, min(gc, bc));
delta = maxC - minC;
*v = maxC;
if (maxC != 0)
*s = delta / maxC;
else
*s = 0;
if (*s == 0)
{
*h = 0;
}
else
{
if (rc == maxC)
*h = (gc - bc) / delta;
else if (gc == maxC)
*h = 2 + (bc - rc) / delta;
else if (bc == maxC)
*h = 4 + (rc - gc) / delta;
*h *= 60.0;
if (*h < 0)
*h += 360.0;
}
}
//***************************************************************************
//
//***************************************************************************
Pixel cSeduService::hsv2rgb(int h, double s, double v)
{
Pixel p;
double rr = 0;
double gg = 0;
double bb = 0;
int i = floor(h/60.0);
double f = h/60.0 - i;
double pv = v * (1 - s);
double qv = v * (1 - s * f);
double tv = v * (1 - s * (1-f));
switch (i)
{
case 0: // rojo dominante
rr = v;
gg = tv;
bb = pv;
break;
case 1: // verde
rr = qv;
gg = v;
bb = pv;
break;
case 2:
rr = pv;
gg = v;
bb = tv;
break;
case 3: // azul
rr = pv;
gg = qv;
bb = v;
break;
case 4:
rr = tv;
gg = pv;
bb = v;
break;
case 5: // rojo
rr = v;
gg = pv;
bb = qv;
break;
}
// set each component to a integer value between 0 and 255
p.r = minMax(255*rr, 0, 255);
p.g = minMax(255*gg, 0, 255);
p.b = minMax(255*bb, 0, 255);
return p;
}
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