inline vec3 HslToRgb(vec3 In)
{
float v1, v2;
vec3 Out;
if(In.s == 0)
{
Out.r = In.l;
Out.g = In.l;
Out.b = In.l;
}
else
{
if(In.l < 0.5f)
v2 = In.l * (1 + In.s);
else
v2 = (In.l+In.s) - (In.s*In.l);
v1 = 2 * In.l - v2;
Out.r = HueToRgb(v1, v2, In.h + (1.0f/3.0f));
Out.g = HueToRgb(v1, v2, In.h);
Out.b = HueToRgb(v1, v2, In.h - (1.0f/3.0f));
}
return Out;
}
/**
Auxilliary function for TestCaseID tbrdrcol-DrawColorCubeBackgroundNow
This method converts a HSL colour to TRgb format.
*/
TRgb ColorConverter::HslToRgb(THsl aHsl)
{
TInt r, g, b;
TInt m1, m2;
const TInt hue = aHsl.Hue();
const TInt sat = aHsl.Saturation();
const TInt lum = aHsl.Lumen();
if (sat==0)
{
r=g=b=lum;
}
else
{
if (lum<=(255/2))
{
m2=lum*(255+sat)/255;
}
else
{
m2=lum+sat-(lum*sat/255);
}
m1=2*lum-m2;
r = HueToRgb(m1, m2, hue+255/3 );
g = HueToRgb(m1, m2, hue );
b = HueToRgb(m1, m2, hue-255/3 );
}
return TRgb(r, g, b);
}
inline vec3 HslToRgb(vec3 HSL)
{
if(HSL.s == 0.0f)
return vec3(HSL.l, HSL.l, HSL.l);
else
{
float v2 = HSL.l < 0.5f ? HSL.l * (1.0f + HSL.s) : (HSL.l+HSL.s) - (HSL.s*HSL.l);
float v1 = 2.0f * HSL.l - v2;
return vec3(HueToRgb(v1, v2, HSL.h + (1.0f/3.0f)), HueToRgb(v1, v2, HSL.h), HueToRgb(v1, v2, HSL.h - (1.0f/3.0f)));
}
}
