Added ColorSpectrum function

Author: photonstorm

src/display/color/ColorSpectrum.js

@@ -0,0 +1,62 @@
+/**
+ * @author       Richard Davey <rich@photonstorm.com>
+ * @copyright    2020 Photon Storm Ltd.
+ * @license      {@link https://opensource.org/licenses/MIT|MIT License}
+ */
+
+var GetColor = require('./GetColor');
+
+/**
+ * Return an array of Colors in a Color Spectrum.
+ *
+ * @function Phaser.Display.Color.ColorSpectrum
+ * @since 3.50.0
+ *
+ * @return {Phaser.Types.Display.ColorObject[]} An array containing 1024 elements, where each contains a Color Object.
+ */
+var ColorSpectrum = function ()
+{
+    var colors = [];
+
+    var range = 255;
+
+    var i;
+    var r = 255;
+    var g = 0;
+    var b = 0;
+
+    //  Red to Yellow
+    for (i = 0; i <= range; i++)
+    {
+        colors.push({ r: r, g: i, b: b, color: GetColor(r, i, b) });
+    }
+
+    g = 255;
+
+    //  Yellow to Green
+    for (i = range; i >= 0; i--)
+    {
+        colors.push({ r: i, g: g, b: b, color: GetColor(i, g, b) });
+    }
+
+    r = 0;
+
+    //  Green to Blue
+    for (i = 0; i <= range; i++, g--)
+    {
+        colors.push({ r: r, g: g, b: i, color: GetColor(r, g, i) });
+    }
+
+    g = 0;
+    b = 255;
+
+    //  Blue to Red
+    for (i = 0; i <= range; i++, b--, r++)
+    {
+        colors.push({ r: r, g: g, b: b, color: GetColor(r, g, b) });
+    }
+
+    return colors;
+};
+
+module.exports = ColorSpectrum;

src/display/color/index.js

@@ -6,6 +6,7 @@
 
 var Color = require('./Color');
 
+Color.ColorSpectrum = require('./ColorSpectrum');
 Color.ColorToRGBA = require('./ColorToRGBA');
 Color.ComponentToHex = require('./ComponentToHex');
 Color.GetColor = require('./GetColor');