Dilate & Erode benchmarks. Unlike the blur benchmarks (which test

Convolution), they show no improvement from unrolling the GLSL loops
in src/gpu/effects/GrMorphologyEffect.cpp

http://codereview.appspot.com/6299067/



git-svn-id: http://skia.googlecode.com/svn/trunk@4230 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 109 insertions, 0 deletions

diff --git a/bench/MorphologyBench.cpp b/bench/MorphologyBench.cpp
new file mode 100644
index 0000000000..5f3af5819e
--- /dev/null
+++ b/bench/MorphologyBench.cpp
@@ -0,0 +1,109 @@
+/*
+ * 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 "SkCanvas.h"
+#include "SkPaint.h"
+#include "SkRandom.h"
+#include "SkShader.h"
+#include "SkString.h"
+#include "SkMorphologyImageFilter.h"
+
+#define SMALL   SkIntToScalar(2)
+#define REAL    SkFloatToScalar(1.5f)
+#define BIG     SkIntToScalar(10)
+
+namespace {
+
+enum MorphologyType {
+    kErode_MT,
+    kDilate_MT
+};
+
+}
+
+static const char* gStyleName[] = {
+    "erode",
+    "dilate"
+};
+
+class MorphologyBench : public SkBenchmark {
+    SkScalar       fRadius;
+    MorphologyType fStyle;
+    SkString       fName;
+
+public:
+    MorphologyBench(void* param, SkScalar rad, MorphologyType style)
+        :  INHERITED(param) {
+        fRadius = rad;
+        fStyle = style;
+        const char* name = rad > 0 ? gStyleName[style] : "none";
+        if (SkScalarFraction(rad) != 0) {
+            fName.printf("morph_%.2f_%s", SkScalarToFloat(rad), name);
+        } else {
+            fName.printf("morph_%d_%s", SkScalarRound(rad), name);
+        }
+    }
+    
+protected:
+    virtual const char* onGetName() {
+        return fName.c_str();
+    }
+    
+    virtual void onDraw(SkCanvas* canvas) {
+        SkPaint paint;
+        this->setupPaint(&paint);
+
+        paint.setAntiAlias(true);
+
+        SkRandom rand;
+        for (int i = 0; i < SkBENCHLOOP(3); i++) {
+            SkRect r = SkRect::MakeWH(rand.nextUScalar1() * 400,
+                                      rand.nextUScalar1() * 400);
+            r.offset(fRadius, fRadius);
+
+            if (fRadius > 0) {
+                SkMorphologyImageFilter* mf = NULL;
+                switch (fStyle) {
+                case kDilate_MT:
+                    mf = new SkDilateImageFilter(fRadius, fRadius);
+                    break;
+                case kErode_MT:
+                    mf = new SkErodeImageFilter(fRadius, fRadius);
+                    break;
+                }
+                paint.setImageFilter(mf)->unref();
+            }
+            canvas->drawOval(r, paint);
+        }
+    }
+    
+private:
+    typedef SkBenchmark INHERITED;
+};
+
+static SkBenchmark* Fact00(void* p) { return new MorphologyBench(p, SMALL, kErode_MT); }
+static SkBenchmark* Fact01(void* p) { return new MorphologyBench(p, SMALL, kDilate_MT); }
+
+static SkBenchmark* Fact10(void* p) { return new MorphologyBench(p, BIG, kErode_MT); }
+static SkBenchmark* Fact11(void* p) { return new MorphologyBench(p, BIG, kDilate_MT); }
+
+static SkBenchmark* Fact20(void* p) { return new MorphologyBench(p, REAL, kErode_MT); }
+static SkBenchmark* Fact21(void* p) { return new MorphologyBench(p, REAL, kDilate_MT); }
+
+static SkBenchmark* FactNone(void* p) { return new MorphologyBench(p, 0, kErode_MT); }
+
+static BenchRegistry gReg00(Fact00);
+static BenchRegistry gReg01(Fact01);
+
+static BenchRegistry gReg10(Fact10);
+static BenchRegistry gReg11(Fact11);
+
+static BenchRegistry gReg20(Fact20);
+static BenchRegistry gReg21(Fact21);
+
+static BenchRegistry gRegNone(FactNone);
+