/**
* Moves the colors in the specified array to non-linear space. The original
* colors are not modified.
*
* @param color an array of colors in linear space
* @return a new array of the same colors in non-linear space
*/
public static Color[] unlinearize(Color[] color)
{
Color[] output = new Color[color.Length];
for (int i = 0; i < color.Length; i++)
output[i] = color[i].copy().toNonLinear();
return output;
}
/**
* Encode the specified colors using Ward's RGBE technique. The returned
* array contains one int for each color in the original array.
*
* @param color array of colors to encode
* @return array of encoded colors
*/
public static int[] encodeRGBE(Color[] color)
{
int[] output = new int[color.Length];
for (int i = 0; i < color.Length; i++)
output[i] = color[i].toRGBE();
return output;
}
/**
* Quantize the specified colors to 8-bit RGB format. The returned array
* contains 3 bytes for each color in the original array.
*
* @param color array of colors to quantize
* @return array of quantized RGB values
*/
public static byte[] quantizeRGB8(Color[] color)
{
byte[] output = new byte[color.Length * 3];
for (int i = 0, index = 0; i < color.Length; i++, index += 3) {
float[] rgb = color[i].getRGB();
output[index + 0] = (byte) MathUtils.clamp((int) (rgb[0] * 255 + 0.5f), 0, 255);
output[index + 1] = (byte) MathUtils.clamp((int) (rgb[1] * 255 + 0.5f), 0, 255);
output[index + 2] = (byte) MathUtils.clamp((int) (rgb[2] * 255 + 0.5f), 0, 255);
}
return output;
}
public bool Update(ParameterList pl, SunflowAPI api)
{
c = pl.getColor("color", c);
return true;
}
public void ScatterPhoton(ShadingState state, Color power)
{
}
public ConstantShader()
{
c = Color.WHITE;
}
/**
* Undoes the premultiplication of the specified color array. The original
* colors are not modified.
*
* @param color an array of premultiplied colors
* @param alpha alpha values corresponding to the colors
* @return an array of unpremultiplied colors
*/
public static Color[] unpremult(Color[] color, float[] alpha)
{
Color[] output = new Color[color.Length];
for (int i = 0; i < color.Length; i++)
output[i] = color[i].copy().mul(1 / alpha[i]);
return output;
}