// This function converts the "color" object to the equivalent RGB values of
// the hue, saturation, and luminance passed as h, s, and l respectively
unsigned int HSLtoRGB(const unsigned int& h, const unsigned int& s, const unsigned int& l)
{
unsigned int r = 0;
unsigned int g = 0;
unsigned int b = 0;
float L = ((float)l)/100;
float S = ((float)s)/100;
float H = ((float)h)/360;
if(s == 0)
{
r = l;
g = l;
b = l;
}
else
{
float temp1 = 0;
if(L < .50)
{
temp1 = L*(1 + S);
}
else
{
temp1 = L + S - (L*S);
}
float temp2 = 2*L - temp1;
float temp3 = 0;
for(int i = 0 ; i < 3 ; i++)
{
switch(i)
{
case 0: // red
{
temp3 = H + .33333f;
if(temp3 > 1)
temp3 -= 1;
HSLtoRGB_Subfunction(r,temp1,temp2,temp3);
break;
}
case 1: // green
{
temp3 = H;
HSLtoRGB_Subfunction(g,temp1,temp2,temp3);
break;
}
case 2: // blue
{
temp3 = H - .33333f;
if(temp3 < 0)
temp3 += 1;
HSLtoRGB_Subfunction(b,temp1,temp2,temp3);
break;
}
default:
{
}
}
}
}
r = (unsigned int)((((float)r)/100)*255);
g = (unsigned int)((((float)g)/100)*255);
b = (unsigned int)((((float)b)/100)*255);
return RGB(r,g,b);
}
// This function converts the "color" object to the equivalent RGB values of
// the hue, saturation, and luminance passed as h, s, and l respectively
rgb_color hsl_to_rgb(hsl_color hsl)
{
uint r = 0;
uint g = 0;
uint b = 0;
hsl.l /= 100;
hsl.s /= 100;
hsl.h /= 360;
if(hsl.s == 0)
{
r = hsl.l;
g = hsl.l;
b = hsl.l;
}
else
{
double temp1 = 0;
if(hsl.l < .50)
{
temp1 = hsl.l*(1 + hsl.s);
}
else
{
temp1 = hsl.l + hsl.s - (hsl.l*hsl.s);
}
double temp2 = 2*hsl.l - temp1;
double temp3 = 0;
for(int i = 0 ; i < 3 ; i++)
{
switch(i)
{
case 0: // red
{
temp3 = hsl.h + .33333;
if(temp3 > 1)
temp3 -= 1;
HSLtoRGB_Subfunction(r,temp1,temp2,temp3);
break;
}
case 1: // green
{
temp3 = hsl.h;
HSLtoRGB_Subfunction(g,temp1,temp2,temp3);
break;
}
case 2: // blue
{
temp3 = hsl.h - .33333;
if(temp3 < 0)
temp3 += 1;
HSLtoRGB_Subfunction(b,temp1,temp2,temp3);
break;
}
default:
{
break;
}
}
}
}
rgb_color rgb;
rgb.r = ((((double)r)/100)*255);
rgb.g = ((((double)g)/100)*255);
rgb.b = ((((double)b)/100)*255);
return rgb;
}
/**
* credit: <http://www.duatiu.com/HSL2RGB.cpp>
* This function converts the "color" object to the equivalent RGB values of
* the hue, saturation, and luminance passed as h, s, and l respectively
*/
static void HSLtoRGB(const unsigned int h, const unsigned int s, const unsigned int l,
unsigned int *rr, unsigned int *rg, unsigned int *rb)
{
unsigned int r = 0;
unsigned int g = 0;
unsigned int b = 0;
float L = ((float)l)/100;
float S = ((float)s)/100;
float H = ((float)h)/360;
float temp1, temp2, temp3;
int i;
if(s == 0)
{
r = l;
g = l;
b = l;
}
else
{
temp1 = 0;
if(L < .50)
{
temp1 = L*(1 + S);
}
else
{
temp1 = L + S - (L*S);
}
temp2 = 2*L - temp1;
temp3 = 0;
for(i = 0 ; i < 3 ; i++)
{
switch(i)
{
case 0: // red
{
temp3 = H + .33333f;
if(temp3 > 1)
temp3 -= 1;
r = HSLtoRGB_Subfunction(temp1,temp2,temp3);
break;
}
case 1: // green
{
temp3 = H;
g = HSLtoRGB_Subfunction(temp1,temp2,temp3);
break;
}
case 2: // blue
{
temp3 = H - .33333f;
if(temp3 < 0)
temp3 += 1;
b = HSLtoRGB_Subfunction(temp1,temp2,temp3);
break;
}
default:
{
}
}
}
}
*rr = (unsigned int)((((float)r)/100)*255);
*rg = (unsigned int)((((float)g)/100)*255);
*rb = (unsigned int)((((float)b)/100)*255);
}
