Fix SkMatrix44::invert(...) for identity matrices and a NULL parameter
Currently, to check if an SkMatrix44 is singular, we call ::invert(NULL) and
check the result. Usually this does no more work than is necessary. One
case where we do far too much work is if |this| is an identity matrix. In
this case, we do not early out and compute a (partial) determinant (we don't
do the full shebang because there are no perspective components).
BUG=None
R=ajuma@chromium.org, reed@google.com
Author: vollick@chromium.org
Review URL: https://codereview.chromium.org/79333002
git-svn-id: http://skia.googlecode.com/svn/trunk@12327 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed