From 3e92bf0fc62c3728cf1c3ae2ea579596cd363c43 Mon Sep 17 00:00:00 2001
From: Andy Meneely <andy@se.rit.edu>
Date: Fri, 1 Aug 2014 15:44:23 -0400
Subject: [PATCH] Added a (currently infinite) cache of loaded pngs

---
 lib/squib/graphics/image.rb | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib/squib/graphics/image.rb b/lib/squib/graphics/image.rb
index 5119ce8..505e656 100644
--- a/lib/squib/graphics/image.rb
+++ b/lib/squib/graphics/image.rb
@@ -1,4 +1,15 @@
 module Squib
+
+  # Cache all pngs we've already loaded
+  # 
+  # :nodoc:
+  # @api private
+  def cache_load_image(file)
+    @img_cache ||= {}
+    @img_cache[file] || @img_cache[file] = Cairo::ImageSurface.from_png(file)
+  end
+  module_function :cache_load_image
+
   class Card
 
     # :nodoc:
@@ -6,7 +17,7 @@ module Squib
     def png(file, x, y, alpha)
       return if file.nil? or file.eql? ''
       cc = cairo_context
-      png = Cairo::ImageSurface.from_png(file)
+      png = Squib.cache_load_image(file)
       cc.set_source(png, x, y)
       cc.paint(alpha)
     end