rgbToXyz function

List<num> rgbToXyz (
  1. num r,
  2. num g,
  3. num b
)

Convert a RGB color to XYZ.

Implementation

List<num> rgbToXyz(num r, num g, num b) {
  r = r / 255.0;
  g = g / 255.0;
  b = b / 255.0;

  if (r > 0.04045) {
    r = pow((r + 0.055) / 1.055, 2.4);
  } else {
    r = r / 12.92;
  }
  if (g > 0.04045) {
    g = pow((g + 0.055) / 1.055, 2.4);
  } else {
    g = g / 12.92;
  }
  if (b > 0.04045) {
    b = pow((b + 0.055) / 1.055, 2.4);
  } else {
    b = b / 12.92;
  }

  r = r * 100.0;
  g = g * 100.0;
  b = b * 100.0;

  return [
    r * 0.4124 + g * 0.3576 + b * 0.1805,
    r * 0.2126 + g * 0.7152 + b * 0.0722,
    r * 0.0193 + g * 0.1192 + b * 0.9505
  ];
}