Add helper SkMatrix44::hasPerspective()

include/utils/SkMatrix44.h

Index: include/utils/SkMatrix44.h
diff --git a/include/utils/SkMatrix44.h b/include/utils/SkMatrix44.h
index 26247a01e99c0aa19dad0152d61309d1c75b577e..513ff96471146331e150bae4f6fa41fe29232173 100644
--- a/include/utils/SkMatrix44.h
+++ b/include/utils/SkMatrix44.h
@@ -198,6 +198,10 @@ public:
         return !(this->getType() & ~(kScale_Mask | kTranslate_Mask));
     }
 
+    inline bool hasPerspective() const {
+        return !(this->getType() & ~kPerspective_Mask);

[danakj, 2014/08/28 19:37:41]

Don't you want (getType() & kPerspective_mask) ?

[reed1, 2014/08/28 20:47:17]

We use SkToBool(predicate) for this sort of thing.

    return SkToBool(this->getType() & kPerspective_Mask);

[tomhudson, 2014/08/29 15:32:56]

Done.

+    }
+
     void setIdentity();
     inline void reset() { this->setIdentity();}