Split up source files

src/core/iridescence.Cielab.scala

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+/*
+    Iridescence, version [unreleased]. Copyright 2024 Jon Pretty, Propensive OÜ.
+
+    The primary distribution site is: https://propensive.com/
+
+    Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
+    file except in compliance with the License. You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software distributed under the
+    License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+    either express or implied. See the License for the specific language governing permissions
+    and limitations under the License.
+*/
+
+package iridescence
+
+import language.experimental.captureChecking
+
+import scala.util.chaining.*
+
+import anticipation.*
+import hypotenuse.*
+
+object Cielab:
+  given (using ColorProfile) => Cielab is RgbColor = _.srgb.rgb24.asInt
+
+case class Cielab(l: Double, a: Double, b: Double):
+  def srgb(using ColorProfile): Srgb = xyz.srgb
+
+  def xyz(using profile: ColorProfile): Xyz =
+    def limit(v: Double): Double = if v*v*v > 0.008856 then v*v*v else (v - 16.0/116)/7.787
+
+    val y = limit((l + 16)/116)*profile.y2
+    val x = limit(a/500 + (l + 16)/116)*profile.x2
+    val z = limit((l + 16)/116 - b/200)*profile.z2
+
+    Xyz(x, y, z)
+
+  def mix(that: Cielab, ratio: Double = 0.5): Cielab =
+    Cielab(l*(1 - ratio) + ratio*that.l, a*(1 - ratio) + ratio*that.a, b*(1 - ratio) + ratio*that.b)
+
+  def delta(that: Cielab): Double = (hyp(F64(that.a), F64(that.b)) - hyp(F64(a), F64(b))).double

src/core/iridescence.Cmy.scala

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+/*
+    Iridescence, version [unreleased]. Copyright 2024 Jon Pretty, Propensive OÜ.
+
+    The primary distribution site is: https://propensive.com/
+
+    Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
+    file except in compliance with the License. You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software distributed under the
+    License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+    either express or implied. See the License for the specific language governing permissions
+    and limitations under the License.
+*/
+
+package iridescence
+
+import language.experimental.captureChecking
+
+import scala.util.chaining.*
+
+import anticipation.*
+
+object Cmy:
+  given Cmy is RgbColor = _.srgb.rgb24.asInt
+
+case class Cmy(cyan: Double, magenta: Double, yellow: Double):
+  def srgb: Srgb = Srgb((1 - cyan), (1 - magenta), (1 - yellow))
+
+  def cmyk: Cmyk =
+    val key = List(1, cyan, magenta, yellow).min
+
+    if key == 1 then Cmyk(0, 0, 0, 1)
+    else Cmyk((cyan - key)/(1 - key), (magenta - key)/(1 - key), (yellow - key)/(1 - key), key)