Adding my Bitmap2Path sample for 1on1 meeting.

bench/PathUtilsBench.cpp

Index: bench/PathUtilsBench.cpp
diff --git a/bench/PathUtilsBench.cpp b/bench/PathUtilsBench.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..6cbbb315aca3fcbadb643cf1b55941cccda5cb14
--- /dev/null
+++ b/bench/PathUtilsBench.cpp
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "SkBenchmark.h"
+#include "SkCanvas.h"
+#include "SkPathUtils.h"
+#include "SkRandom.h"
+#include "SkTime.h"
+#include "SkString.h"
+
+#define H 16
+#define W 16
+#define STRIDE 2
+
+//this function is redefined for sample, test, and bench. is there anywhere
+// I can put it to avoid code duplcation?           
+static void fillRandomBits( int chars, char* bits ){
+    SkTime time;
+    SkMWCRandom rand = SkMWCRandom( time.GetMSecs() );
+
+    for (int i = 0; i < chars; ++i){
+        bits[i] = rand.nextU();
+    }
+}           
+
+static void path_proc(char* bits, SkPath* path) {
+    SkPathUtils::BitsToPath_Path(path, bits, H, W, STRIDE);
+}
+
+static void region_proc(char* bits, SkPath* path) {
+    SkPathUtils::BitsToPath_Region(path, bits, H, W, STRIDE);
+}
+
+/// Emulates the mix of rects blitted by gmail during scrolling
+class PathUtilsBench : public SkBenchmark {
+    typedef void (*Proc)(char*, SkPath*);
+
+    Proc fProc;
+    int fH, fW, fStride;
+    SkString fName;
+    char* bits[H * STRIDE];
+    
+    enum { N = SkBENCHLOOP(20) };
+
+public:
+    PathUtilsBench(void* param, Proc proc, const char name[]) : INHERITED(param) {
+        fProc = proc;
+        fName.printf("pathUtils_%s", name);
+        
+
+    }
+
+protected:
+    virtual const char* onGetName() { return fName.c_str(); }
+
+    virtual void onDraw(SkCanvas* canvas) {
+
+        for (int i = 0; i < N; ++i){
+            //create a random 16x16 bitmap
+            fillRandomBits(H * STRIDE, (char*) &bits);
+            
+            //use passed function pointer to handle it
+            SkPath path;
+            fProc( (char*) &bits, &path);
+        }
+    }
+
+private:
+    typedef SkBenchmark INHERITED;
+};
+
+static SkBenchmark* PU_path(void* p) { return SkNEW_ARGS(PathUtilsBench, (p, path_proc, "path")); } 
+static SkBenchmark* PU_region(void* p) { return SkNEW_ARGS(PathUtilsBench, (p, region_proc, "region")); } 
+
+static BenchRegistry PU_Path(PU_path);
+static BenchRegistry PU_Region(PU_region);