add getTypes() to SkMatrix44, to cache how complex the matrix is.
add bench

optimize operator== by performing 4 compares in a row before checking
optimize setconcat by noting when we can write the answer directly into this

At least on this macbook, I had to mark helpers like isIdentity() as inline to get them inlined.
Review URL: https://codereview.appspot.com/6863053

git-svn-id: http://skia.googlecode.com/svn/trunk@6655 2bbb7eff-a529-9590-31e7-b0007b416f81
6 files changed