static inline void HSL_2_RGB(const float *HSL, float *RGB)
{
float H = HSL[0];
float S = HSL[1];
float L = HSL[2];
float var_1, var_2;
if(S < 1e-6f)
{
RGB[0] = RGB[1] = RGB[2] = L;
}
else
{
if(L < 0.5f)
var_2 = L * (1.0f + S);
else
var_2 = (L + S) - (S * L);
var_1 = 2.0f * L - var_2;
RGB[0] = Hue_2_RGB(var_1, var_2, H + (1.0f / 3.0f));
RGB[1] = Hue_2_RGB(var_1, var_2, H);
RGB[2] = Hue_2_RGB(var_1, var_2, H - (1.0f / 3.0f));
}
}
void HSL(float H, float S, float L, float& Rval, float& Gval, float& Bval)
{
if (H < 0) {H = 0;}
else if (H > 1) {
while (H>1) {H = H - 1;}
}
if (S < 0) {S = 0;}
else if (S > 1) {S = 1;}
float var_1;
float var_2;
float Hu=H+.33;
float Hd=H-.33;
if ( S == 0 ) //HSL from 0 to 1
{
Rval = L * 255; //RGB results from 0 to 255
Gval = L * 255;
Bval = L * 255;
}
else
{
if ( L < 0.5 )
var_2 = L * ( 1 + S );
else
var_2 = ( L + S ) - ( S * L );
var_1 = 2 * L - var_2;
Rval = round(255 * Hue_2_RGB( var_1, var_2, Hu ));
// Serial.print("Rval:");
// Serial.println(Hue_2_RGB( var_1, var_2, Hu ));
Gval = round(255 * Hue_2_RGB( var_1, var_2, H ));
Bval = round(255 * Hue_2_RGB( var_1, var_2, Hd ));
}
}
int CRotate::HSLtoRGB(double h, double s, double l, double* r, double* g, double* b)
{
double v1, v2;
if ( s == 0 ) // HSL values = From 0 to 1
{
*r = l ; // RGB results = From 0 to 1
*g = l ;
*b = l ;
}
else
{
if ( l < 0.5 )
v2 = l * ( 1 + s );
else
v2 = ( l + s ) - ( s * l );
v1 = 2 * l - v2;
*r = Hue_2_RGB( v1, v2, h + ( 1.0/3.0 ) );
*g = Hue_2_RGB( v1, v2, h );
*b = Hue_2_RGB( v1, v2, h - ( 1.0/3.0 ) );
}
return 1;
}
t_rgba hsla_to_rgba(t_hsla color)
{
float var1, var2;
t_rgba ncolor;
if(color.saturation == 0.f)
{
ncolor.red = color.lightness;
ncolor.green = color.lightness;
ncolor.blue = color.lightness;
}
else
{
if(color.lightness < 0.5f)
var2 = color.lightness * (1.f + color.saturation);
else
var2 = (color.lightness + color.saturation) - (color.saturation * color.lightness);
var1 = 2.f * color.lightness - var2;
ncolor.red = Hue_2_RGB(var1, var2, color.hue + (1.f / 3.f));
ncolor.green = Hue_2_RGB(var1, var2, color.hue);
ncolor.blue = Hue_2_RGB(var1, var2, color.hue - (1.f / 3.f));
}
ncolor.alpha = color.alpha;
return ncolor;
}
// documented in /docs/sdk/script/fn
global func HSL2RGB(int hsl)
{
var hue = GetRGBaValue(hsl, 1), sat = GetRGBaValue(hsl, 2), lightness = GetRGBaValue(hsl, 3);
var red, green, blue;
var var1, var2;
if (sat == 0)
{
red = green = blue = lightness;
}
else
{
if (lightness < 128)
var2 = lightness * (255 + sat) / 255;
else
var2 = lightness + sat - lightness * sat / 255;
var1 = 2 * lightness - var2;
red = Hue_2_RGB(var1, var2, hue + 85);
green = Hue_2_RGB(var1, var2, hue);
blue = Hue_2_RGB(var1, var2, hue - 85);
}
return RGB(red, green, blue);
}
static void HSL_2_RGB(float h, float s, float l, float *r, float *g, float *b)
{
if ( s == 0 ) { //HSL from 0 to 1
*r = l * 255.0; //RGB results from 0 to 255
*g = l * 255.0;
*b = l * 255.0;
} else {
float var_2;
if ( l < 0.5 ) var_2 = l * ( 1.0 + s );
else var_2 = ( l + s ) - ( s * l );
float var_1 = 2.0 * l - var_2;
*r = 255.0 * Hue_2_RGB( var_1, var_2, h + ( 1.0 / 3.0 ) );
*g = 255.0 * Hue_2_RGB( var_1, var_2, h );
*b = 255.0 * Hue_2_RGB( var_1, var_2, h - ( 1.0 / 3.0 ) );
}
}
/**
* HSL to RGB.
*/
Color HSL2RGB(ColorHSL col) {
Color ncol(0, 0, 0, 0);
if (col.s == 0) {
ncol.red = (unsigned char)(col.l * 255);
ncol.green = (unsigned char)(col.l * 255);
ncol.blue = (unsigned char)(col.l * 255);
} else {
double v1, v2;
if (col.l < 0.5) {
v2 = col.l * (1 + col.s);
} else {
v2 = (col.l + col.s) - (col.s * col.l);
}
v1 = 2 * col.l - v2;
ncol.red = (unsigned char)(255 * Hue_2_RGB(v1, v2, col.h + (1.0 / 3)));
ncol.green = (unsigned char)(255 * Hue_2_RGB(v1, v2, col.h));
ncol.blue = (unsigned char)(255 * Hue_2_RGB(v1, v2, col.h - (1.0 / 3)));
}
return ncol;
}
