add bench for SkPath::Iter and SkPath::RawIter

git-svn-id: http://skia.googlecode.com/svn/trunk@3844 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 96 insertions, 0 deletions

diff --git a/bench/PathIterBench.cpp b/bench/PathIterBench.cpp
new file mode 100644
index 0000000000..8e4308ef13
--- /dev/null
+++ b/bench/PathIterBench.cpp
@@ -0,0 +1,96 @@
+
+/*
+ * 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 "SkBitmap.h"
+#include "SkCanvas.h"
+#include "SkColorPriv.h"
+#include "SkPaint.h"
+#include "SkRandom.h"
+#include "SkShader.h"
+#include "SkString.h"
+
+static int rand_pts(SkRandom& rand, SkPoint pts[4]) {
+    int n = rand.nextU() & 3;
+    n += 1;
+
+    for (int i = 0; i < n; ++i) {
+        pts[i].fX = rand.nextSScalar1();
+        pts[i].fY = rand.nextSScalar1();
+    }
+    return n;
+}
+
+class PathIterBench : public SkBenchmark {
+    SkString    fName;
+    SkPath      fPath;
+    bool        fRaw;
+
+    enum { N = SkBENCHLOOP(500) };
+
+public:
+    PathIterBench(void* param, bool raw) : INHERITED(param) {
+        fName.printf("pathiter_%s", raw ? "raw" : "consume");
+        fRaw = raw;
+
+        SkRandom rand;
+        for (int i = 0; i < 1000; ++i) {
+            SkPoint pts[4];
+            int n = rand_pts(rand, pts);
+            switch (n) {
+                case 1:
+                    fPath.moveTo(pts[0]);
+                    break;
+                case 2:
+                    fPath.lineTo(pts[1]);
+                    break;
+                case 3:
+                    fPath.quadTo(pts[1], pts[2]);
+                    break;
+                case 4:
+                    fPath.cubicTo(pts[1], pts[2], pts[3]);
+                    break;
+            }
+        }
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return fName.c_str();
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        if (fRaw) {
+            for (int i = 0; i < N; ++i) {
+                SkPath::RawIter iter(fPath);
+                SkPath::Verb verb;
+                SkPoint      pts[4];
+                
+                while ((verb = iter.next(pts)) != SkPath::kDone_Verb);
+            }
+        } else {
+            for (int i = 0; i < N; ++i) {
+                SkPath::Iter iter(fPath, false);
+                SkPath::Verb verb;
+                SkPoint      pts[4];
+                
+                while ((verb = iter.next(pts)) != SkPath::kDone_Verb);
+            }
+        }
+    }
+
+private:
+    typedef SkBenchmark INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+static SkBenchmark* F0(void* p) { return new PathIterBench(p, false); }
+static SkBenchmark* F1(void* p) { return new PathIterBench(p, true); }
+
+static BenchRegistry gR0(F0);
+static BenchRegistry gR1(F1);