add countPoints() and getPoint()

git-svn-id: http://skia.googlecode.com/svn/trunk@494 2bbb7eff-a529-9590-31e7-b0007b416f81

include/core/SkPath.h

@@ -123,6 +123,18 @@ public:
     */
     bool isRect(SkRect* rect) const;
 
+    /** Return the number of points in the path
+     */
+    int countPoints() const {
+        return this->getPoints(NULL, 0);
+    }
+
+    /** Return the point at the specified index. If the index is out of range
+         (i.e. is not 0 <= index < countPoints()) then the returned coordinates
+         will be (0,0)
+     */
+    SkPoint getPoint(int index) const;
+
     /** Returns the number of points in the path. Up to max points are copied.
      
         @param points If not null, receives up to max points

src/core/SkPath.cpp

@@ -184,6 +184,13 @@ int SkPath::getPoints(SkPoint copy[], int max) const {
     return count;
 }
 
+SkPoint SkPath::getPoint(int index) const {
+    if ((unsigned)index < (unsigned)fPts.count()) {
+        return fPts[index];
+    }
+    return SkPoint::Make(0, 0);
+}
+
 void SkPath::getLastPt(SkPoint* lastPt) const {
     SkDEBUGCODE(this->validate();)