add benchmark for stroked drawRect/drawOval/drawRRect, to prepare for optimizing

those based on special-casing stroking for single-contour-convex shapes.



git-svn-id: http://skia.googlecode.com/svn/trunk@7537 2bbb7eff-a529-9590-31e7-b0007b416f81

bench/StrokeBench.cpp

@@ -0,0 +1,105 @@
+/*
+ * Copyright 2013 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 "SkPaint.h"
+#include "SkRRect.h"
+#include "SkString.h"
+
+struct RRectRec {
+    SkCanvas*   fCanvas;
+    SkRRect     fRRect;
+    SkPaint     fPaint;
+};
+
+typedef const char* (*DrawProc)(const RRectRec*, int);
+
+static const char* draw_rect(const RRectRec* rec, int count) {
+    if (rec) {
+        const SkRect& r = rec->fRRect.getBounds();
+        for (int i = 0; i < count; ++i) {
+            rec->fCanvas->drawRect(r, rec->fPaint);
+        }
+    }
+    return "rect";
+}
+
+static const char* draw_rrect(const RRectRec* rec, int count) {
+    if (rec) {
+        for (int i = 0; i < count; ++i) {
+            rec->fCanvas->drawRRect(rec->fRRect, rec->fPaint);
+        }
+    }
+    return "rrect";
+}
+
+static const char* draw_oval(const RRectRec* rec, int count) {
+    if (rec) {
+        const SkRect& r = rec->fRRect.getBounds();
+        for (int i = 0; i < count; ++i) {
+            rec->fCanvas->drawOval(r, rec->fPaint);
+        }
+    }
+    return "oval";
+}
+
+// Handles rect, rrect, and oval
+//
+// Test drawing a small stroked version to see the effect of special-casing
+// our stroke code for these convex single-contour shapes.
+//
+class StrokeRRectBench : public SkBenchmark {
+    SkString fName;
+    SkPaint::Join fJoin;
+    RRectRec fRec;
+    DrawProc fProc;
+    enum { N = SkBENCHLOOP(500) };
+public:
+    StrokeRRectBench(void* param, SkPaint::Join j, DrawProc proc) : SkBenchmark(param) {
+        static const char* gJoinName[] = {
+            "miter", "round", "bevel"
+        };
+
+        fJoin = j;
+        fProc = proc;
+        fName.printf("draw_stroke_%s_%s", proc(NULL, 0), gJoinName[j]);
+        
+        SkRect r = { 20, 20, 40, 40 };
+        SkScalar rad = 4;
+        fRec.fRRect.setRectXY(r, rad, rad);
+    }
+
+protected:
+    virtual const char* onGetName() {
+        return fName.c_str();
+    }
+
+    virtual void onDraw(SkCanvas* canvas) {
+        fRec.fCanvas = canvas;
+        this->setupPaint(&fRec.fPaint);
+        fRec.fPaint.setStyle(SkPaint::kStroke_Style);
+        fRec.fPaint.setStrokeJoin(fJoin);
+        fRec.fPaint.setStrokeWidth(5);
+        fProc(&fRec, N);
+    }
+
+private:
+    typedef SkBenchmark INHERITED;
+};
+
+DEF_BENCH( return new StrokeRRectBench(p, SkPaint::kRound_Join, draw_rect); )
+DEF_BENCH( return new StrokeRRectBench(p, SkPaint::kBevel_Join, draw_rect); )
+DEF_BENCH( return new StrokeRRectBench(p, SkPaint::kMiter_Join, draw_rect); )
+
+DEF_BENCH( return new StrokeRRectBench(p, SkPaint::kRound_Join, draw_rrect); )
+DEF_BENCH( return new StrokeRRectBench(p, SkPaint::kBevel_Join, draw_rrect); )
+DEF_BENCH( return new StrokeRRectBench(p, SkPaint::kMiter_Join, draw_rrect); )
+
+DEF_BENCH( return new StrokeRRectBench(p, SkPaint::kRound_Join, draw_oval); )
+DEF_BENCH( return new StrokeRRectBench(p, SkPaint::kBevel_Join, draw_oval); )
+DEF_BENCH( return new StrokeRRectBench(p, SkPaint::kMiter_Join, draw_oval); )

gyp/bench.gypi

@@ -42,6 +42,7 @@
     '../bench/ScalarBench.cpp',
     '../bench/ShaderMaskBench.cpp',
     '../bench/SortBench.cpp',
+    '../bench/StrokeBench.cpp',
     '../bench/TableBench.cpp',
     '../bench/TextBench.cpp',
     '../bench/TileBench.cpp',