commit 043d23a8a8e8fe214df0d10c4341c4ad55e7b2aa
author Haoyu Zhang <haoyuchang@google.com> Wed Feb 22 11:20:09 2023 -0800
committer Haoyu Zhang <haoyuchang@google.com> Sat Mar 04 05:55:34 2023 -0800
tree 40b3c458c29cadeed4852729a0f20a4790f6df1f
parent baf281de2be4e8118edf3766d39cb654860e41f1

Optimize GraphemeClusterSegmentFinder performance

This CL utilized minikin:isGraphemeBreak to compute all grapheme break indices when creating GraphemeClusterSegmentFinder. This makes all methods (such as #nextStartBoundary) of GraphemeClusterSegmentFinder O(1) instead of O(n).

Bug: 271004887
Test: atest TextViewHandwritingGestureTest
Change-Id: I61c1f2c45123a584456b4860b72cd4fdc84c5f1c

libs/hwui/Android.bp

diff --git a/libs/hwui/Android.bp b/libs/hwui/Android.bp
index bcbe706..baf2d8d 100644
--- a/libs/hwui/Android.bp
+++ b/libs/hwui/Android.bp
@@ -374,6 +374,7 @@
         "jni/text/LineBreaker.cpp",
         "jni/text/MeasuredText.cpp",
         "jni/text/TextShaper.cpp",
+        "jni/text/GraphemeBreak.cpp",
     ],
 
     header_libs: [