add bench for hairlines

git-svn-id: http://skia.googlecode.com/svn/trunk@6118 2bbb7eff-a529-9590-31e7-b0007b416f81

bench/LineBench.cpp

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2012 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"
+#include "SkTArray.h"
+
+
+class LineBench : public SkBenchmark {
+    SkScalar    fStrokeWidth;
+    bool        fDoAA;
+    SkString    fName;
+    enum {
+        PTS = 500,
+        N = SkBENCHLOOP(10)
+    };
+    SkPoint fPts[PTS];
+
+public:
+    LineBench(void* param, SkScalar width, bool doAA) : INHERITED(param) {
+        fStrokeWidth = width;
+        fDoAA = doAA;
+        fName.printf("lines_%g_%s", width, doAA ? "AA" : "BW");
+
+        SkRandom rand;
+        for (int i = 0; i < PTS; ++i) {
+            fPts[i].set(rand.nextUScalar1() * 640, rand.nextUScalar1() * 480);
+        }
+    }
+
+protected:
+    virtual const char* onGetName() SK_OVERRIDE {
+        return fName.c_str();
+    }
+
+    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+        SkPaint paint;
+        this->setupPaint(&paint);
+
+        paint.setStyle(SkPaint::kStroke_Style);
+        paint.setAntiAlias(fDoAA);
+        paint.setStrokeWidth(fStrokeWidth);
+
+        for (int i = 0; i < N; i++) {
+            canvas->drawPoints(SkCanvas::kLines_PointMode, PTS, fPts, paint);
+        }
+    }
+
+private:
+    typedef SkBenchmark INHERITED;
+};
+
+DEF_BENCH(return new LineBench(p, 0,            false);)
+DEF_BENCH(return new LineBench(p, SK_Scalar1,   false);)
+DEF_BENCH(return new LineBench(p, 0,            true);)
+DEF_BENCH(return new LineBench(p, SK_Scalar1/2, true);)
+DEF_BENCH(return new LineBench(p, SK_Scalar1,   true);)

bench/SkBenchmark.h

@@ -13,12 +13,6 @@
 #include "SkTDict.h"
 #include "SkTRegistry.h"
 
-
-#define SK_MACRO_CONCAT(X, Y)       SK_MACRO_CONCAT_IMPL(X, Y)
-#define SK_MACRO_CONCAT_IMPL(X, Y)  X ## Y
-
-#define SK_MACRO_APPEND_LINE(name)  SK_MACRO_CONCAT(name, __LINE__)
-
 #define DEF_BENCH(code) \
 static SkBenchmark* SK_MACRO_APPEND_LINE(F_)(void* p) { code; } \
 static BenchRegistry SK_MACRO_APPEND_LINE(R_)(SK_MACRO_APPEND_LINE(F_));

gyp/bench.gypi

@@ -19,6 +19,7 @@
     '../bench/GradientBench.cpp',
     '../bench/GrMemoryPoolBench.cpp',
     '../bench/InterpBench.cpp',
+    '../bench/LineBench.cpp',
     '../bench/MathBench.cpp',
     '../bench/MatrixBench.cpp',
     '../bench/MatrixConvolutionBench.cpp',