public RGBA_Doubles(RGBA_Doubles c, double a_)
{
m_r = c.m_r;
m_g = c.m_g;
m_b = c.m_b;
m_a = a_;
}
//--------------------------------------------------------------------
public RGBA_Doubles(RGBA_Doubles c)
: this(c, 1)
{
}
public RGBA_Bytes(RGBA_Doubles c)
{
m_R = ((byte)agg_basics.uround(c.m_r * (double)base_mask));
m_G = ((byte)agg_basics.uround(c.m_g * (double)base_mask));
m_B = ((byte)agg_basics.uround(c.m_b * (double)base_mask));
m_A = ((byte)agg_basics.uround(c.m_a * (double)base_mask));
}
public static RGBA_Doubles GetTweenColor(RGBA_Doubles Color1, RGBA_Doubles Color2, double RatioOf2)
{
if (RatioOf2 <= 0)
{
return new RGBA_Doubles(Color1);
}
if (RatioOf2 >= 1.0)
{
return new RGBA_Doubles(Color2);
}
// figure out how much of each color we should be.
double RatioOf1 = 1.0 - RatioOf2;
return new RGBA_Doubles(
Color1.m_r * RatioOf1 + Color2.m_r * RatioOf2,
Color1.m_g * RatioOf1 + Color2.m_g * RatioOf2,
Color1.m_b * RatioOf1 + Color2.m_b * RatioOf2);
}
public static RGBA_Doubles rgba_pre(RGBA_Doubles c, double a)
{
return new RGBA_Doubles(c, a).premultiply();
}
public static RGBA_Doubles from_wavelength(double wl, double gamma)
{
RGBA_Doubles t = new RGBA_Doubles(0.0, 0.0, 0.0);
if (wl >= 380.0 && wl <= 440.0)
{
t.m_r = -1.0 * (wl - 440.0) / (440.0 - 380.0);
t.m_b = 1.0;
}
else
if (wl >= 440.0 && wl <= 490.0)
{
t.m_g = (wl - 440.0) / (490.0 - 440.0);
t.m_b = 1.0;
}
else
if (wl >= 490.0 && wl <= 510.0)
{
t.m_g = 1.0;
t.m_b = -1.0 * (wl - 510.0) / (510.0 - 490.0);
}
else
if (wl >= 510.0 && wl <= 580.0)
{
t.m_r = (wl - 510.0) / (580.0 - 510.0);
t.m_g = 1.0;
}
else
if (wl >= 580.0 && wl <= 645.0)
{
t.m_r = 1.0;
t.m_g = -1.0 * (wl - 645.0) / (645.0 - 580.0);
}
else
if (wl >= 645.0 && wl <= 780.0)
{
t.m_r = 1.0;
}
double s = 1.0;
if (wl > 700.0) s = 0.3 + 0.7 * (780.0 - wl) / (780.0 - 700.0);
else if (wl < 420.0) s = 0.3 + 0.7 * (wl - 380.0) / (420.0 - 380.0);
t.m_r = Math.Pow(t.m_r * s, gamma);
t.m_g = Math.Pow(t.m_g * s, gamma);
t.m_b = Math.Pow(t.m_b * s, gamma);
return t;
}