From 713eb632c832264f8bbfdf63525b3e42446d3998 Mon Sep 17 00:00:00 2001
From: totoro <david.rene@calexium.com>
Date: Sat, 24 Feb 2018 14:59:31 +0100
Subject: [PATCH] add brightness function which calculate the brightness of the given color. This is helpful for determine which color can readable with this color.

---
 web/color/color.anubis | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+), 0 deletions(-)
 create mode 100644 web/color/color.anubis

diff --git a/web/color/color.anubis b/web/color/color.anubis
new file mode 100644
index 0000000..f4e5948
--- /dev/null
+++ b/web/color/color.anubis
@@ -0,0 +1,32 @@
+/*
+ * Created by PyramIDE.
+ * User: フランスのトトロ aka (David RENÉ) 
+ * Date: 07/01/2018
+ * Time: 11:59
+ * © Calexium 
+ */
+
+transmit system/string.anubis
+transmit system/convert.anubis
+transmit tools/maybefloat.anubis
+
+
+public define Int
+/**
+ */
+  brightness
+  (
+    String  color //color value in hexadecimal form without any prefixed '0x' or '#'
+  )=
+  with   red = hexa_to_mb_Float(color, 0, 2),
+  with green = hexa_to_mb_Float(color, 2, 2),
+  with  blue = hexa_to_mb_Float(color, 4, 2),
+  if sqrt(red * red * success(0.241) + green * green * success(0.691) + blue * blue * success(0.068)) is
+  {
+    failure         then  /*println("brightness failure");*/255,
+    success(value)  then  
+      with result = integral_part(value),
+      //println("brightness value"+result);
+      result
+  }
+.
--
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