Add SkPath::getVerbs/countVerbs

Review URL: http://codereview.appspot.com/6306053/


git-svn-id: http://skia.googlecode.com/svn/trunk@4209 2bbb7eff-a529-9590-31e7-b0007b416f81

2 files changed, 34 insertions, 0 deletions

diff --git a/include/core/SkPath.h b/include/core/SkPath.h
index 4e987c0a20..e6989f2838 100644
--- a/include/core/SkPath.h
+++ b/include/core/SkPath.h
@@ -259,6 +259,21 @@ public:
     */
     int getPoints(SkPoint points[], int max) const;
 
+    /** Return the number of verbs in the path
+     */
+    int countVerbs() const {
+        return this->getVerbs(NULL, 0);
+    }
+
+    /** Returns the number of verbs in the path. Up to max verbs are copied. The
+        verbs are copied as one byte per verb.
+        
+        @param verbs If not null, receives up to max verbs
+        @param max The maximum number of verbs to copy into verbs
+        @return the actual number of verbs in the path
+    */
+    int getVerbs(uint8_t verbs[], int max) const;
+
     //! Swap contents of this and other. Guaranteed not to throw
     void swap(SkPath& other);
 
diff --git a/include/core/SkTDArray.h b/include/core/SkTDArray.h
index f0f94494f3..426bb6d303 100644
--- a/include/core/SkTDArray.h
+++ b/include/core/SkTDArray.h
@@ -228,6 +228,25 @@ public:
         return -1;
     }
 
+    /**
+     * Copies up to max elements into dst. The number of items copied is
+     * capped by count - index. The actual number copied is returned.
+     */
+    int copyRange(T* dst, size_t index, int max) const {
+        SkASSERT(max >= 0);
+        SkASSERT(!max || dst);
+        if (index >= fCount) {
+            return 0;
+        }
+        int count = SkMin32(max, fCount - index);
+        memcpy(dst, fArray + index, sizeof(T) * count);
+        return count;
+    }
+
+    void copy(T* dst) const {
+        this->copyRange(0, fCount, dst);
+    }
+
     // routines to treat the array like a stack
     T*          push() { return this->append(); }
     void        push(const T& elem) { *this->append() = elem; }