commit 1ff3d1e3cd851aff1e20fcb8958bbf3784d8f922
author chaviw <chaviw@google.com> Wed Jul 01 15:53:47 2020 -0700
committer chaviw <chaviw@google.com> Tue Jul 21 11:26:55 2020 -0700
tree 931707079d6f4305e6fce7453c13d8d853386e06
parent dc07032296a6cd8525b5c7c1648ed7aed6f7769c

Use Transform in InputDispatcher

Modified InputDispatcher to use the Transform object instead of offset
and scale values.

Bug: 158476194
Test: /data/nativetest64/inputflinger_tests/inputflinger_tests
Test: /data/nativetest64/libinput_tests/libinput_tests
Change-Id: I31242fa6af92b02158ccb0d292c208a4a21c9e43

libs/ui/Transform.cpp

diff --git a/libs/ui/Transform.cpp b/libs/ui/Transform.cpp
index 3bf3903..5424a3c 100644
--- a/libs/ui/Transform.cpp
+++ b/libs/ui/Transform.cpp
@@ -133,6 +133,14 @@
     return mMatrix[1][1];
 }
 
+float Transform::getScaleX() const {
+    return sqrt(dsdx() * dsdx()) + (dtdx() * dtdx());
+}
+
+float Transform::getScaleY() const {
+    return sqrt((dtdy() * dtdy()) + (dsdy() * dsdy()));
+}
+
 void Transform::reset() {
     mType = IDENTITY;
     for(size_t i = 0; i < 3; i++) {