From: Jiyoun Park <jy0703.park@samsung.com>

From: Jiyoun Park <jy0703.park@samsung.com>
Subject: [E-devel] [Patch] Add scale down decoding feature to evas png loader

I add scale down decoding feature to evas png loader. 5515X3986 size png image need 80~90M memory,
but scale down(scale num=2) option can reduce memory to 25~30M.

I use down sample method for scale down.
(there is more efficient algorithm for scale down, I'll add this to my
todo list)

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/evas@64170 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33