#define SHIFT_RIGHT17 (1.0 / 131072.0)
#define SHIFT_RIGHT18 (1.0 / 262144.0)
#define SHIFT_RIGHT19 (1.0 / 524288.0)
#define SHIFT_RIGHT20 (1.0 / 1048576.0)
#define SHIFT_RIGHT21 (1.0 / 2097152.0)
#define SHIFT_RIGHT22 (1.0 / 4194304.0)
#define SHIFT_RIGHT23 (1.0 / 8388608.0)
#define SHIFT_RIGHT24 (1.0 / 16777216.0)

#define SHIFT_LEFT17 (131072.0)
#define SHIFT_LEFT18 (262144.0)
#define SHIFT_LEFT19 (524288.0)
#define SHIFT_LEFT20 (1048576.0)
#define SHIFT_LEFT21 (2097152.0)
#define SHIFT_LEFT22 (4194304.0)
#define SHIFT_LEFT23 (8388608.0)
#define SHIFT_LEFT24 (16777216.0)

vec2 unpack_float(float packedValue) {
  int packedIntValue = int(packedValue);
  int v0 = packedIntValue / 256;
  return vec2(v0, packedIntValue - v0 * 256);
}

vec4 decode_color(vec2 encodedColor) {
  return vec4(unpack_float(encodedColor[0]) / 255.0, unpack_float(encodedColor[1]) / 255.0);
}