FEATURE: new letter avatars algorithm

lib/letter_avatar.rb

@@ -1,13 +1,13 @@
 class LetterAvatar
 
   # BUMP UP if avatar algorithm changes
-  VERSION = 3
+  VERSION = 4
 
-  # Largest avatar generated, one day when pixel ratio hit 3
-  # we will need to change this
-  FULLSIZE = 240
+  # CHANGE these values to support more pixel ratios
+  FULLSIZE  = 120 * 3
+  POINTSIZE = 280
 
-  class<<self
+  class << self
 
     class Identity
       attr_accessor :color, :letter
@@ -46,6 +46,7 @@ class LetterAvatar
         generate_fullsize(identity) if !cache || !File.exists?(fullsize)
 
         OptimizedImage.resize(fullsize, filename, size, size)
+
         filename
       end
     end
@@ -53,7 +54,6 @@ class LetterAvatar
     def cached_path(identity, size)
       dir = "#{cache_path}/#{identity.letter}/#{identity.color.join("_")}"
       FileUtils.mkdir_p(dir)
-
       "#{dir}/#{size}.png"
     end
 
@@ -66,18 +66,15 @@ class LetterAvatar
       letter = identity.letter
 
       filename = fullsize_path(identity)
-      stroke = darken(color, 0.8)
 
       instructions = %W{
         -size #{FULLSIZE}x#{FULLSIZE}
         xc:#{to_rgb(color)}
-        -pointsize 180
-        -fill white
-        -gravity Center
+        -pointsize #{POINTSIZE}
+        -fill 'rgba(255,255,255,0.8)'
         -font 'Helvetica'
-        -stroke #{to_rgb(stroke)}
-        -strokewidth 2
-        -annotate -0+20 '#{letter}'
+        -gravity Center
+        -annotate -0+26 '#{letter}'
         -depth 8
         '#{filename}'
       }
@@ -89,12 +86,6 @@ class LetterAvatar
       filename
     end
 
-    def darken(color,pct)
-      color.map do |n|
-        (n.to_f * pct).to_i
-      end
-    end
-
     def to_rgb(color)
       r,g,b = color
       "'rgb(#{r},#{g},#{b})'"