Modify LineBench for drawing straight line

bench/StraightLineBench.cpp

Index: bench/StraightLineBench.cpp
diff --git a/bench/StraightLineBench.cpp b/bench/StraightLineBench.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..183f0548f160f41ca917bb645d060c754ed77711
--- /dev/null
+++ b/bench/StraightLineBench.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Benchmark.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 StraightLineBench : public Benchmark {
+    SkScalar    fStrokeWidth;
+    bool        fDoAA;
+    SkString    fName;
+    enum {
+        LINES = 500;
+    };
+    SkPoint     fStartPts[LINES];
+    SkPoint     fEndPts[LINES];
+
+public:
+    StraightLineBench(SkScalar width, bool doAA)  {
+        fStrokeWidth = width;
+        fDoAA = doAA;

[robertphillips, 2016/05/02 15:33:40]

I think you want this to be: straightline_%g_%s

[xidachen, 2016/05/02 15:54:10]

Thank you, changed to straightline, and compilation error is also fixed.

+        fName.printf("lines_%g_%s", width, doAA ? "AA" : "BW");
+
+        SkRandom rand;
+        for (int i = 0; i < LINES; ++i) {
+            fStartPts[i].set(rand.nextUScalar1() * 640, rand.nextUScalar1() * 480);
+            // Half of lines start straight horizontally and half of them vertically
+            if (i < LINES / 2) {
+                fEndPts[i].set(fStartPts[i].x(), rand.nextUScalar1() * 480);
+            } else {
+                fEndPts[i].set(rand.nextUScalar1() * 640, fStartPts[i].y());
+            }
+        }
+    }
+
+protected:
+    const char* onGetName() override {
+        return fName.c_str();
+    }
+
+    void onDraw(int loops, SkCanvas* canvas) override {
+        SkPaint paint;
+        this->setupPaint(&paint);
+
+        paint.setStyle(SkPaint::kStroke_Style);
+        paint.setAntiAlias(fDoAA);
+        paint.setStrokeWidth(fStrokeWidth);
+
+        for (int i = 0; i < loops; i++) {
+            canvas->drawLine(fStartPts[i].x(), fStartPts[i].y(), fEndPts[i].x(), fEndPts[i].y(), paint);
+        }
+    }
+
+private:
+    typedef Benchmark INHERITED;
+};
+
+DEF_BENCH(return new StraightLineBench(0,            false);)
+DEF_BENCH(return new StraightLineBench(SK_Scalar1,   false);)
+DEF_BENCH(return new StraightLineBench(0,            true);)
+DEF_BENCH(return new StraightLineBench(SK_Scalar1/2, true);)
+DEF_BENCH(return new StraightLineBench(SK_Scalar1,   true);)