Add bench for hairline paths

bench/HairlinePathBench.cpp

Index: bench/HairlinePathBench.cpp
diff --git a/bench/HairlinePathBench.cpp b/bench/HairlinePathBench.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..5830128950af83d389de69115b7716ed631a6c62
--- /dev/null
+++ b/bench/HairlinePathBench.cpp
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2011 Google Inc.

[bsalomon, 2013/07/15 17:42:56]

2013

+ *
+ * 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 "SkPaint.h"
+#include "SkShader.h"
+#include "SkString.h"
+
+#define HYPERBOLA 2.0f 

[tfarina, 2013/07/16 02:03:16]

can these be const floats instead?

+#define ELLIPSE  0.5f
+
+static const int points[] = {
+            10, 10, 15, 5, 20, 20

[tfarina, 2013/07/16 02:03:16]

indent 4 spaces only?

+        };

[tfarina, 2013/07/16 02:03:16]

mv to first column?

+
+class HairlinePathBench : public SkBenchmark {
+    SkPaint     fPaint;

[bsalomon, 2013/07/15 17:42:56]

Move these down to private below?

+    SkString    fName;
+    enum { N = SkBENCHLOOP(1000) };
+public:
+    HairlinePathBench(void* param) : INHERITED(param) {
+        fPaint.setStyle(SkPaint::kStroke_Style);
+        fPaint.setStrokeWidth(SkIntToScalar(0));
+    }
+

[tfarina, 2013/07/16 02:03:16]

virtual destructor?

+    virtual void appendName(SkString*) = 0;

[bsalomon, 2013/07/15 17:42:56]

do these need to be public?

+    virtual void makePath(SkPath*) = 0;
+    virtual int complexity() { return 0; }

[tfarina, 2013/07/16 02:03:16]

const?

+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        fName.printf("path_hairline_");
+        this->appendName(&fName);
+        return fName.c_str();
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkPaint paint(fPaint);
+        this->setupPaint(&paint);
+
+        SkPath path;
+        this->makePath(&path);
+
+        int count = N;
+        for (int i = 0; i < count; i++) {
+            canvas->drawPath(path, paint);
+        }
+    }
+
+private:
+    typedef SkBenchmark INHERITED;
+};
+
+class LinePathBench : public HairlinePathBench {
+public:
+    LinePathBench(void* param) : INHERITED(param) {}
+
+    virtual void appendName(SkString* name) SK_OVERRIDE {
+        name->append("line");
+    }
+    virtual void makePath(SkPath* path) SK_OVERRIDE {
+        path->moveTo(SkIntToScalar(points[0]), SkIntToScalar(points[1]));
+        path->lineTo(SkIntToScalar(points[2]), SkIntToScalar(points[3]));
+        path->lineTo(SkIntToScalar(points[4]), SkIntToScalar(points[5]));
+    }
+private:
+    typedef HairlinePathBench INHERITED;
+};
+
+class QuadPathBench : public HairlinePathBench {
+public:
+    QuadPathBench(void* param) : INHERITED(param) {}
+
+    virtual void appendName(SkString* name) SK_OVERRIDE {
+        name->append("quad");
+    }
+    virtual void makePath(SkPath* path) SK_OVERRIDE {
+        path->moveTo(SkIntToScalar(points[0]), SkIntToScalar(points[1]));
+        path->quadTo(SkIntToScalar(points[2]), SkIntToScalar(points[3]),
+                     SkIntToScalar(points[4]), SkIntToScalar(points[5]));
+    }
+private:
+    typedef HairlinePathBench INHERITED;
+};
+
+class ConicPathBench : public HairlinePathBench {
+public:
+    ConicPathBench(void* param, const SkScalar weight) : INHERITED(param), fWeight(weight) {}

[tfarina, 2013/07/16 02:03:16]

can we try to keep these in 80 columns (I know we don't stay adhere to this much
though)?

[bsalomon, 2013/07/16 12:57:17]

Skia's rough limit is 100 cols.

+
+    virtual void appendName(SkString* name) SK_OVERRIDE {
+        name->append("conic");
+        if (fWeight == HYPERBOLA) {

[tfarina, 2013/07/16 02:03:16]

I think in skia people do comparisons in the reverse other, i.e., HYPEROLA ==
fWeight

+            name->append("_hyperbola");
+        } else if (fWeight == ELLIPSE) {
+            name->append("_ellipse");
+        };

[tfarina, 2013/07/16 02:03:16]

micronit: no need of ; here

+    }
+    virtual void makePath(SkPath* path) SK_OVERRIDE {
+        path->moveTo(SkIntToScalar(points[0]), SkIntToScalar(points[1]));
+        path->conicTo(SkIntToScalar(points[2]), SkIntToScalar(points[3]),
+                     SkIntToScalar(points[4]), SkIntToScalar(points[5]),
+                     fWeight);
+    }
+private:
+    SkScalar fWeight;
+    typedef HairlinePathBench INHERITED;
+};
+
+DEF_BENCH( return new LinePathBench(p); )
+DEF_BENCH( return new QuadPathBench(p); )
+DEF_BENCH( return new ConicPathBench(p, ELLIPSE); )    // ellipse weight 0.5
+DEF_BENCH( return new ConicPathBench(p, HYPERBOLA); )  // hyperbola weight 2.0