Add SkMatrix44 constructor that allows user to control the initialization
method. Preliminary results using Chromium's cc_perftests
show that we can avoid almost half of the default constructors from
redundantly/unnecessarily initializing the matrix to identity.
Review URL: https://codereview.appspot.com/6872056
git-svn-id: http://skia.googlecode.com/svn/trunk@6742 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/utils/SkMatrix44.h b/include/utils/SkMatrix44.h
index af61a11..4789e7e2 100644
--- a/include/utils/SkMatrix44.h
+++ b/include/utils/SkMatrix44.h
@@ -103,6 +103,17 @@
class SK_API SkMatrix44 {
public:
+
+ enum Uninitialized_Constructor {
+ kUninitialized_Constructor
+ };
+ enum Identity_Constructor {
+ kIdentity_Constructor
+ };
+
+ SkMatrix44(Uninitialized_Constructor) { }
+ SkMatrix44(Identity_Constructor) { this->setIdentity(); }
+
SkMatrix44() { this->setIdentity(); }
SkMatrix44(const SkMatrix44&);
SkMatrix44(const SkMatrix44& a, const SkMatrix44& b);