/// <summary>
/// Gets the color from the scale at position 'pos'.
/// </summary>
/// <remarks>If the position is outside the scale [0..1] only the fractional part
/// is used (in other words the scale restarts for each integer-part).</remarks>
/// <param name="pos">Position on scale between 0.0f and 1.0f</param>
/// <returns>Color on scale</returns>
public StyleColor GetColor(Single pos)
{
if (_colors.Length != _positions.Length)
{
throw (new ArgumentException("Colors and Positions arrays must be of equal length"));
}
if (_colors.Length < 2)
{
throw (new ArgumentException("At least two colors must be defined in the ColorBlend"));
}
if (_positions[0] != 0f)
{
throw (new ArgumentException("First position value must be 0.0f"));
}
if (_positions[_positions.Length - 1] != 1f)
{
throw (new ArgumentException("Last position value must be 1.0f"));
}
if (pos > 1 || pos < 0)
{
pos -= (Single)Math.Floor(pos);
}
Int32 i = 1;
while (i < _positions.Length && _positions[i] < pos)
{
i++;
}
Single frac = (pos - _positions[i - 1]) / (_positions[i] - _positions[i - 1]);
Int32 r = (Int32)Math.Round((_colors[i - 1].R * (1 - frac) + _colors[i].R * frac));
Int32 g = (Int32)Math.Round((_colors[i - 1].G * (1 - frac) + _colors[i].G * frac));
Int32 b = (Int32)Math.Round((_colors[i - 1].B * (1 - frac) + _colors[i].B * frac));
Int32 a = (Int32)Math.Round((_colors[i - 1].A * (1 - frac) + _colors[i].A * frac));
return(StyleColor.FromBgra(b, g, r, a));
}
public static StyleColor Convert(GdiColor color)
{
return(StyleColor.FromBgra(color.B, color.G, color.R, color.A));
}