# HG changeset patch
# User Jason Maltzen <jason@hiddenachievement.com>
# Date 2018-05-18 00:19:38
# Node ID 2f97b4ec280b5416fec41926fac36465dfcec926
# Parent  5db137e7ce9040653d7abbea76ba6b27a0e7c900

Use value from HSV for determining whether text should be white or black in exported wiki format recipes.

diff --git a/PlayerProfile.cs b/PlayerProfile.cs
--- a/PlayerProfile.cs
+++ b/PlayerProfile.cs
@@ -508,7 +508,57 @@ namespace DesertPaintLab
         {
             ExportWikiFormat(writer, this.ribbonRecipes);
         }
-        
+
+        static public PaintColor RgbToHsv(PaintColor color)
+        {
+            float h = 0;
+            float s = 0;
+            float r = color.Red / 255.0f;
+            float g = color.Green / 255.0f;
+            float b = color.Blue / 255.0f;
+            float cmax = Math.Max(Math.Max(r, g), b);
+            float cmin = Math.Min(Math.Min(r, g), b);
+            float cd = cmax - cmin;
+            if (cd == 0)
+            {
+                h = 0;
+            }
+            else if (cmax == r)
+            {
+                h = (((g - b) / cd) % 6) / 6f;
+            }
+            else if (cmax == g)
+            {
+                h = (((b - r) / cd) + 2) / 6f;
+            }
+            else
+            {
+                h = (((r - g) / cd) + 4) / 6f;
+            }
+
+            if (cmax == 0)
+            {
+                s = 0;
+            }
+            else
+            {
+                s = cd / cmax;
+            }
+
+            if (h < 0)
+            {
+                h = 1 + h;
+            }
+
+            if (h >= 1)
+            {
+                h = 0;
+            }
+
+
+            return new PaintColor((byte)(h * 255), (byte)(s * 255), (byte)(cmax * 255));
+        }
+
         public void ExportWikiFormat(TextWriter writer, SortedDictionary<string, PaintRecipe> recipeDict)
         {
             PaintRecipe recipe;
@@ -522,17 +572,16 @@ namespace DesertPaintLab
                     writer.WriteLine("|-");
                     string colorLine = "| ";
                     colorLine += "style=\"font-weight: bold; background-color: #" + color.Red.ToString("X2") + color.Green.ToString("X2") + color.Blue.ToString("X2") + ";";
-                    float rPortion = color.Red / 255.0f;
-                    float gPortion = color.Green / 255.0f;
-                    float bPortion = color.Blue / 255.0f;
-                    float maxColor = Math.Max(rPortion, Math.Max(gPortion, bPortion));
-                    float minColor = Math.Min(rPortion, Math.Min(gPortion, bPortion));
-                    float luminance = (maxColor - minColor) * 0.5f;
-                    if (luminance < 0.5f)
+                    PaintColor hsvColor = RgbToHsv(color);
+                    if (hsvColor.Blue < 200) // value
                     {
                         // dark color gets light text
                         colorLine += " color: #FFFFFF;";
                     }
+                    else
+                    {
+                        colorLine += "color: #000000;";
+                    }
                     colorLine += "\" | " + color.Name + " || ";
                     if (recipeDict.TryGetValue(color.Name, out recipe))
                     {