Add SkPath::isLastContourClosed()

Adds a simple method for checking if the last command/verb in the
current contour is a 'close'.

This will simplify determining "closedness" for blink::Path, and aid
in the implementation of algorithms such as:

https://drafts.fxtf.org/motion-1/#motion-processing (second item in list)

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1601103006

Review URL: https://codereview.chromium.org/1601103006

1 files changed, 8 insertions, 0 deletions

diff --git a/src/core/SkPath.cpp b/src/core/SkPath.cpp
index 4af2dad526..4c148c5e4a 100644
--- a/src/core/SkPath.cpp
+++ b/src/core/SkPath.cpp
@@ -318,6 +318,14 @@ void SkPath::rewind() {
     this->resetFields();
 }
 
+bool SkPath::isLastContourClosed() const {
+    int verbCount = fPathRef->countVerbs();
+    if (0 == verbCount) {
+        return false;
+    }
+    return kClose_Verb == fPathRef->atVerb(verbCount - 1);
+}
+
 bool SkPath::isLine(SkPoint line[2]) const {
     int verbCount = fPathRef->countVerbs();